// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2016 Namjae Jeon * Copyright (C) 2018 Samsung Electronics Co., Ltd. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "glob.h" #include "../common/smbfsctl.h" #include "oplock.h" #include "smbacl.h" #include "auth.h" #include "asn1.h" #include "connection.h" #include "transport_ipc.h" #include "transport_rdma.h" #include "vfs.h" #include "vfs_cache.h" #include "misc.h" #include "server.h" #include "smb_common.h" #include "../common/smb2status.h" #include "ksmbd_work.h" #include "mgmt/user_config.h" #include "mgmt/share_config.h" #include "mgmt/tree_connect.h" #include "mgmt/user_session.h" #include "mgmt/ksmbd_ida.h" #include "ndr.h" #include "stats.h" #include "transport_tcp.h" #include "compress.h" static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) { if (work->next_smb2_rcv_hdr_off) { *req = ksmbd_req_buf_next(work); *rsp = ksmbd_resp_buf_next(work); } else { *req = smb_get_msg(work->request_buf); *rsp = smb_get_msg(work->response_buf); } } static struct ksmbd_work *smb2_notify_cancel_claim(void **argv); static void smb2_notify_cancel_fn(void **argv); static void smb2_complete_notify_cancel(struct ksmbd_work *in_work); #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) #define SMB2_CREATE_FILE_ATTRIBUTE_MASK \ (FILE_ATTRIBUTE_MASK & ~(FILE_ATTRIBUTE_INTEGRITY_STREAM | \ FILE_ATTRIBUTE_NO_SCRUB_DATA)) /* Windows reports automatic write-time updates at roughly 15 ms resolution. */ #define KSMBD_WRITE_TIME_RESOLUTION (15ULL * 10000) /* MAXFILESIZE in [MS-FSA] 2.1.5.3 Server Requests a Write. */ #define SMB2_MAX_FILE_SIZE 0xfffffff0000ULL struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) { struct channel *chann; down_read(&sess->chann_lock); chann = xa_load(&sess->ksmbd_chann_list, (long)conn); up_read(&sess->chann_lock); return chann; } #define KSMBD_MAX_CHANNELS 32 static int register_session_channel(struct ksmbd_session *sess, struct ksmbd_conn *conn, const char *sess_key) { struct channel *chann, *old; unsigned long index; unsigned int count = 0; int rc = 0; down_write(&sess->chann_lock); if (sess->tearing_down) { rc = -ESHUTDOWN; goto out; } if (xa_load(&sess->ksmbd_chann_list, (long)conn)) goto out; xa_for_each(&sess->ksmbd_chann_list, index, chann) count++; if (count >= KSMBD_MAX_CHANNELS) { rc = -ENOSPC; goto out; } chann = kmalloc_obj(struct channel, KSMBD_DEFAULT_GFP); if (!chann) { rc = -ENOMEM; goto out; } chann->conn = conn; memcpy(chann->sess_key, sess_key, sizeof(chann->sess_key)); old = xa_store(&sess->ksmbd_chann_list, (long)conn, chann, KSMBD_DEFAULT_GFP); if (xa_is_err(old)) { kfree_sensitive(chann); rc = xa_err(old); } out: up_write(&sess->chann_lock); return rc; } /** * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. * @work: smb work * * Return: 0 if there is a tree connection matched or these are * skipable commands, otherwise error */ int smb2_get_ksmbd_tcon(struct ksmbd_work *work) { struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); unsigned int cmd = le16_to_cpu(req_hdr->Command); unsigned int tree_id; if (cmd == SMB2_TREE_CONNECT_HE || cmd == SMB2_CANCEL_HE || cmd == SMB2_LOGOFF_HE) { ksmbd_debug(SMB, "skip to check tree connect request\n"); return 0; } if (xa_empty(&work->sess->tree_conns)) { ksmbd_debug(SMB, "NO tree connected\n"); return -ENOENT; } tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); /* * If request is not the first in Compound request, * Just validate tree id in header with work->tcon->id. */ if (work->next_smb2_rcv_hdr_off) { if (!work->tcon) { pr_err("The first operation in the compound does not have tcon\n"); return -EINVAL; } if (work->tcon->t_state != TREE_CONNECTED) return -ENOENT; if (tree_id != UINT_MAX && work->tcon->id != tree_id) { pr_err("tree id(%u) is different with id(%u) in first operation\n", tree_id, work->tcon->id); return -EINVAL; } return 1; } work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); if (!work->tcon) { pr_err("Invalid tid %d\n", tree_id); return -ENOENT; } return 1; } /** * smb2_set_err_rsp() - set error response code on smb response * @work: smb work containing response buffer */ void smb2_set_err_rsp(struct ksmbd_work *work) { struct smb2_err_rsp *err_rsp; if (work->next_smb2_rcv_hdr_off) err_rsp = ksmbd_resp_buf_next(work); else err_rsp = smb_get_msg(work->response_buf); if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { int err; err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; err_rsp->ErrorContextCount = 0; err_rsp->Reserved = 0; err_rsp->ByteCount = 0; err_rsp->ErrorData[0] = 0; err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, __SMB2_HEADER_STRUCTURE_SIZE + SMB2_ERROR_STRUCTURE_SIZE2); if (err) work->send_no_response = 1; } } /** * is_smb2_neg_cmd() - is it smb2 negotiation command * @work: smb work containing smb header * * Return: true if smb2 negotiation command, otherwise false */ bool is_smb2_neg_cmd(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb_get_msg(work->request_buf); /* is it SMB2 header ? */ if (hdr->ProtocolId != SMB2_PROTO_NUMBER) return false; /* make sure it is request not response message */ if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) return false; if (hdr->Command != SMB2_NEGOTIATE) return false; return true; } /** * is_smb2_rsp() - is it smb2 response * @work: smb work containing smb response buffer * * Return: true if smb2 response, otherwise false */ bool is_smb2_rsp(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb_get_msg(work->response_buf); /* is it SMB2 header ? */ if (hdr->ProtocolId != SMB2_PROTO_NUMBER) return false; /* make sure it is response not request message */ if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) return false; return true; } /** * get_smb2_cmd_val() - get smb command code from smb header * @work: smb work containing smb request buffer * * Return: smb2 request command value */ u16 get_smb2_cmd_val(struct ksmbd_work *work) { struct smb2_hdr *rcv_hdr; if (work->next_smb2_rcv_hdr_off) rcv_hdr = ksmbd_req_buf_next(work); else rcv_hdr = smb_get_msg(work->request_buf); return le16_to_cpu(rcv_hdr->Command); } /** * set_smb2_rsp_status() - set error response code on smb2 header * @work: smb work containing response buffer * @err: error response code */ void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) { struct smb2_hdr *rsp_hdr; if (work->next_smb2_rcv_hdr_off) { rsp_hdr = ksmbd_resp_buf_next(work); rsp_hdr->Status = err; smb2_set_err_rsp(work); return; } rsp_hdr = smb_get_msg(work->response_buf); rsp_hdr->Status = err; work->iov_idx = 0; work->iov_cnt = 0; work->next_smb2_rcv_hdr_off = 0; smb2_set_err_rsp(work); } /** * init_smb2_neg_rsp() - initialize smb2 response for negotiate command * @work: smb work containing smb request buffer * * smb2 negotiate response is sent in reply of smb1 negotiate command for * dialect auto-negotiation. */ int init_smb2_neg_rsp(struct ksmbd_work *work) { struct smb2_hdr *rsp_hdr; struct smb2_negotiate_rsp *rsp; struct ksmbd_conn *conn = work->conn; int err; rsp_hdr = smb_get_msg(work->response_buf); memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->CreditRequest = cpu_to_le16(2); rsp_hdr->Command = SMB2_NEGOTIATE; rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); rsp_hdr->NextCommand = 0; rsp_hdr->MessageId = 0; rsp_hdr->Id.SyncId.ProcessId = 0; rsp_hdr->Id.SyncId.TreeId = 0; rsp_hdr->SessionId = 0; memset(rsp_hdr->Signature, 0, 16); rsp = smb_get_msg(work->response_buf); WARN_ON(ksmbd_conn_good(conn)); rsp->StructureSize = cpu_to_le16(65); ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); rsp->DialectRevision = cpu_to_le16(conn->dialect); /* Not setting conn guid rsp->ServerGUID, as it * not used by client for identifying connection */ rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); /* Default Max Message Size till SMB2.0, 64K*/ rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); rsp->SystemTime = cpu_to_le64(ksmbd_systime()); rsp->ServerStartTime = 0; rsp->SecurityBufferOffset = cpu_to_le16(128); rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + le16_to_cpu(rsp->SecurityBufferOffset)); rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); if (err) return err; conn->use_spnego = true; ksmbd_conn_set_need_negotiate(conn); return 0; } /** * smb2_set_rsp_credits() - set number of credits in response buffer * @work: smb work containing smb response buffer */ int smb2_set_rsp_credits(struct ksmbd_work *work) { struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); struct ksmbd_conn *conn = work->conn; unsigned short credits_requested, aux_max; unsigned short credit_charge, credits_granted = 0; u64 window_room, i; if (work->send_no_response) return 0; hdr->CreditCharge = req_hdr->CreditCharge; if (conn->total_credits > conn->vals->max_credits) { hdr->CreditRequest = 0; pr_err("Total credits overflow: %d\n", conn->total_credits); return -EINVAL; } credit_charge = max_t(unsigned short, le16_to_cpu(req_hdr->CreditCharge), 1); if (credit_charge > conn->total_credits) { ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", credit_charge, conn->total_credits); return -EINVAL; } conn->total_credits -= credit_charge; conn->outstanding_credits -= credit_charge; work->credit_charge = 0; credits_requested = max_t(unsigned short, le16_to_cpu(req_hdr->CreditRequest), 1); /* according to smb2.credits smbtorture, Windows server * 2016 or later grant up to 8192 credits at once. * * TODO: Need to adjuct CreditRequest value according to * current cpu load */ if (hdr->Command == SMB2_NEGOTIATE) aux_max = 1; else aux_max = conn->vals->max_credits - conn->total_credits; /* * The command sequence window must not grow beyond * KSMBD_CMD_SEQ_WINDOW sequence numbers ahead of the oldest one still * outstanding. Cap the grant by the room left in the window so that * credits are withheld until the client consumes the low end (and so * that seq_bitmap stays usable as a ring). */ window_room = conn->seq_low + KSMBD_CMD_SEQ_WINDOW - conn->seq_high; aux_max = min_t(unsigned short, aux_max, window_room); credits_granted = min_t(unsigned short, credits_requested, aux_max); conn->total_credits += credits_granted; work->credits_granted += credits_granted; /* Extend the sequence window to cover the newly granted credits. */ for (i = conn->seq_high; i < conn->seq_high + credits_granted; i++) __set_bit(i & (KSMBD_CMD_SEQ_WINDOW - 1), conn->seq_bitmap); conn->seq_high += credits_granted; if (!req_hdr->NextCommand) { /* Update CreditRequest in last request */ hdr->CreditRequest = cpu_to_le16(work->credits_granted); } ksmbd_debug(SMB, "credits: requested[%d] granted[%d] total_granted[%d]\n", credits_requested, credits_granted, conn->total_credits); return 0; } /** * init_chained_smb2_rsp() - initialize smb2 chained response * @work: smb work containing smb response buffer */ static void init_chained_smb2_rsp(struct ksmbd_work *work) { struct smb2_hdr *req = ksmbd_req_buf_next(work); struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); struct smb2_hdr *rsp_hdr; struct smb2_hdr *rcv_hdr; int next_hdr_offset = 0; int len, new_len; /* Len of this response = updated RFC len - offset of previous cmd * in the compound rsp */ /* Storing the current local FID which may be needed by subsequent * command in the compound request */ if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; work->compound_sid = le64_to_cpu(rsp->SessionId); work->compound_status = STATUS_SUCCESS; } else if ((req->Command == SMB2_FLUSH || req->Command == SMB2_READ || req->Command == SMB2_WRITE) && rsp->Status == STATUS_SUCCESS) { u64 volatile_id = KSMBD_NO_FID; u64 persistent_id = KSMBD_NO_FID; if (req->Command == SMB2_FLUSH) { struct smb2_flush_req *flush_req = (struct smb2_flush_req *)req; volatile_id = flush_req->VolatileFileId; persistent_id = flush_req->PersistentFileId; } else if (req->Command == SMB2_READ) { struct smb2_read_req *read_req = (struct smb2_read_req *)req; volatile_id = read_req->VolatileFileId; persistent_id = read_req->PersistentFileId; } else { struct smb2_write_req *write_req = (struct smb2_write_req *)req; volatile_id = write_req->VolatileFileId; persistent_id = write_req->PersistentFileId; } if (has_file_id(volatile_id)) { work->compound_fid = volatile_id; work->compound_pfid = persistent_id; work->compound_sid = le64_to_cpu(rsp->SessionId); work->compound_status = STATUS_SUCCESS; } } else if (req->Command == SMB2_CREATE) { work->compound_fid = KSMBD_NO_FID; work->compound_pfid = KSMBD_NO_FID; work->compound_sid = le64_to_cpu(rsp->SessionId); work->compound_status = rsp->Status; } else if (rsp->Status != STATUS_SUCCESS) { work->compound_sid = le64_to_cpu(rsp->SessionId); /* * Only carry the failed status forward when the failing command * was itself part of the related chain. An unrelated command * that fails (e.g. a standalone request with a bad session id) * must not seed the status for a following related command, * which has to be evaluated on its own (and may legitimately * fail with a different status such as INVALID_PARAMETER). The * compound session id is still tracked so a following related * command can validate it. */ if (req->Flags & SMB2_FLAGS_RELATED_OPERATIONS) work->compound_status = rsp->Status; } len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; next_hdr_offset = le32_to_cpu(req->NextCommand); new_len = ALIGN(len, 8); work->iov[work->iov_idx].iov_len += (new_len - len); inc_rfc1001_len(work->response_buf, new_len - len); rsp->NextCommand = cpu_to_le32(new_len); work->next_smb2_rcv_hdr_off += next_hdr_offset; work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; work->next_smb2_rsp_hdr_off += new_len; ksmbd_debug(SMB, "Compound req new_len = %d rcv off = %d rsp off = %d\n", new_len, work->next_smb2_rcv_hdr_off, work->next_smb2_rsp_hdr_off); rsp_hdr = ksmbd_resp_buf_next(work); rcv_hdr = ksmbd_req_buf_next(work); if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { ksmbd_debug(SMB, "related flag should be set\n"); work->compound_fid = KSMBD_NO_FID; work->compound_pfid = KSMBD_NO_FID; work->compound_status = STATUS_SUCCESS; } memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->Command = rcv_hdr->Command; /* * Message is response. We don't grant oplock yet. */ rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | SMB2_FLAGS_RELATED_OPERATIONS); if (rcv_hdr->Flags & SMB2_FLAGS_REPLAY_OPERATION) rsp_hdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; rsp_hdr->NextCommand = 0; rsp_hdr->MessageId = rcv_hdr->MessageId; rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; rsp_hdr->SessionId = rcv_hdr->SessionId; memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); } static bool smb2_compound_has_failed(struct ksmbd_work *work, struct smb2_hdr *rsp) { if (!work->next_smb2_rcv_hdr_off || has_file_id(work->compound_fid) || work->compound_status == STATUS_SUCCESS) return false; rsp->Status = work->compound_status; smb2_set_err_rsp(work); return true; } /** * is_chained_smb2_message() - check for chained command * @work: smb work containing smb request buffer * * Return: true if chained request, otherwise false */ bool is_chained_smb2_message(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb_get_msg(work->request_buf); unsigned int len, next_cmd; if (hdr->ProtocolId != SMB2_PROTO_NUMBER) return false; hdr = ksmbd_req_buf_next(work); next_cmd = le32_to_cpu(hdr->NextCommand); if (next_cmd > 0) { if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + __SMB2_HEADER_STRUCTURE_SIZE > get_rfc1002_len(work->request_buf)) { pr_err("next command(%u) offset exceeds smb msg size\n", next_cmd); return false; } if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > work->response_sz) { pr_err("next response offset exceeds response buffer size\n"); return false; } ksmbd_debug(SMB, "got SMB2 chained command\n"); init_chained_smb2_rsp(work); return true; } else if (work->next_smb2_rcv_hdr_off) { /* * This is last request in chained command, * align response to 8 byte */ len = ALIGN(get_rfc1002_len(work->response_buf), 8); len = len - get_rfc1002_len(work->response_buf); if (len) { ksmbd_debug(SMB, "padding len %u\n", len); work->iov[work->iov_idx].iov_len += len; inc_rfc1001_len(work->response_buf, len); } work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; } return false; } /** * init_smb2_rsp_hdr() - initialize smb2 response * @work: smb work containing smb request buffer * * Return: 0 */ int init_smb2_rsp_hdr(struct ksmbd_work *work) { struct smb2_hdr *rsp_hdr = smb_get_msg(work->response_buf); struct smb2_hdr *rcv_hdr = smb_get_msg(work->request_buf); memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->Command = rcv_hdr->Command; /* * Message is response. We don't grant oplock yet. */ rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); if (rcv_hdr->Flags & SMB2_FLAGS_REPLAY_OPERATION) rsp_hdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; rsp_hdr->NextCommand = 0; rsp_hdr->MessageId = rcv_hdr->MessageId; rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; rsp_hdr->SessionId = rcv_hdr->SessionId; memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); return 0; } static __le16 smb3_hdr_channel_sequence(struct smb2_hdr *hdr) { return ((struct smb3_hdr_req *)hdr)->ChannelSequence; } static bool smb3_hdr_replay(struct smb2_hdr *hdr) { return hdr->Flags & SMB2_FLAGS_REPLAY_OPERATION; } static int smb3_verify_channel_sequence(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_hdr *hdr, bool allow_stale) { __le16 chseq_le; u16 chseq, old_chseq; int ret = 0; if (work->conn->dialect < SMB30_PROT_ID) return 0; chseq_le = smb3_hdr_channel_sequence(hdr); chseq = le16_to_cpu(chseq_le); spin_lock(&fp->f_lock); old_chseq = le16_to_cpu(fp->channel_sequence); if (smb3_hdr_replay(hdr)) { if (chseq == old_chseq && fp->outstanding_pre_requests == 0) { fp->outstanding_requests++; } else if ((u16)(chseq - old_chseq) <= 0x7fff && fp->outstanding_pre_requests == 0) { fp->outstanding_pre_requests += fp->outstanding_requests; fp->outstanding_requests = 1; fp->channel_sequence = chseq_le; } else if (allow_stale) { fp->outstanding_pre_requests++; } else { ret = -EAGAIN; } } else { if (chseq == old_chseq) { fp->outstanding_requests++; } else if ((u16)(chseq - old_chseq) <= 0x7fff) { fp->outstanding_pre_requests += fp->outstanding_requests; fp->outstanding_requests = 1; fp->channel_sequence = chseq_le; } else if (allow_stale) { fp->outstanding_pre_requests++; } else { ret = -EAGAIN; } } spin_unlock(&fp->f_lock); return ret; } static void smb3_complete_channel_sequence(struct ksmbd_work *work, struct ksmbd_file *fp, __le16 chseq_le) { u16 chseq; if (work->conn->dialect < SMB30_PROT_ID) return; chseq = le16_to_cpu(chseq_le); spin_lock(&fp->f_lock); if (chseq == le16_to_cpu(fp->channel_sequence)) { if (fp->outstanding_requests) fp->outstanding_requests--; } else { if (fp->outstanding_pre_requests) fp->outstanding_pre_requests--; } spin_unlock(&fp->f_lock); } static int smb2_set_request_open(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_hdr *hdr, bool verify_chseq, bool allow_stale_chseq) { struct ksmbd_file *open; int ret; smb2_complete_request_open(work); open = ksmbd_file_get(fp); if (!open) return -ESTALE; if (verify_chseq) { ret = smb3_verify_channel_sequence(work, fp, hdr, allow_stale_chseq); if (ret) { ksmbd_fd_put(work, open); return ret; } work->request_open_chseq_tracked = true; } work->request_open = open; work->request_open_chseq = smb3_hdr_channel_sequence(hdr); return 0; } void smb2_complete_request_open(struct ksmbd_work *work) { struct ksmbd_file *open = work->request_open; if (!open) return; if (work->request_open_chseq_tracked) smb3_complete_channel_sequence(work, open, work->request_open_chseq); work->request_open = NULL; work->request_open_chseq_tracked = false; ksmbd_fd_put(work, open); } static bool smb2_lock_sequence_applicable(struct ksmbd_work *work, struct ksmbd_file *fp) { return fp->is_resilient || fp->is_durable || fp->is_persistent || (work->conn->dialect >= SMB30_PROT_ID && (work->conn->vals->req_capabilities & SMB2_GLOBAL_CAP_MULTI_CHANNEL)); } static bool smb2_verify_lock_sequence(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_lock_req *req) { u32 val, index; u8 sequence; bool replay = false; if (work->conn->dialect == SMB20_PROT_ID || !smb2_lock_sequence_applicable(work, fp)) return false; val = le32_to_cpu(req->LockSequenceNumber); sequence = val & 0xf; index = val >> 4; if (!index || index > KSMBD_LOCK_SEQ_ARRAY_SIZE) return false; spin_lock(&fp->f_lock); if (fp->lock_seq[index - 1].valid) { if (fp->lock_seq[index - 1].sequence == sequence) replay = true; else fp->lock_seq[index - 1].valid = false; } spin_unlock(&fp->f_lock); return replay; } static void smb2_update_lock_sequence(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_lock_req *req) { u32 val, index; u8 sequence; if (work->conn->dialect == SMB20_PROT_ID || !smb2_lock_sequence_applicable(work, fp)) return; val = le32_to_cpu(req->LockSequenceNumber); sequence = val & 0xf; index = val >> 4; if (!index || index > KSMBD_LOCK_SEQ_ARRAY_SIZE) return; spin_lock(&fp->f_lock); fp->lock_seq[index - 1].valid = true; fp->lock_seq[index - 1].sequence = sequence; spin_unlock(&fp->f_lock); } /** * smb2_allocate_rsp_buf() - allocate smb2 response buffer * @work: smb work containing smb request buffer * * Return: 0 on success, otherwise error */ int smb2_allocate_rsp_buf(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb_get_msg(work->request_buf); size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; size_t large_sz = small_sz + work->conn->vals->max_trans_size; size_t sz = small_sz; int cmd = le16_to_cpu(hdr->Command); if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) sz = large_sz; if (cmd == SMB2_QUERY_INFO_HE) { struct smb2_query_info_req *req; if (get_rfc1002_len(work->request_buf) < offsetof(struct smb2_query_info_req, OutputBufferLength)) return -EINVAL; req = smb_get_msg(work->request_buf); if ((req->InfoType == SMB2_O_INFO_FILE && (req->FileInfoClass == FILE_FULL_EA_INFORMATION || req->FileInfoClass == FILE_ALL_INFORMATION || req->FileInfoClass == FILE_NORMALIZED_NAME_INFORMATION)) || req->InfoType == SMB2_O_INFO_SECURITY) sz = large_sz; } /* allocate large response buf for chained commands */ if (le32_to_cpu(hdr->NextCommand) > 0) sz = large_sz; work->response_buf = kvzalloc(sz, KSMBD_DEFAULT_GFP); if (!work->response_buf) return -ENOMEM; work->response_sz = sz; return 0; } static bool smb2_session_expired_cmd_allowed(struct ksmbd_work *work, unsigned int cmd) { struct smb2_lock_req *req; unsigned int len, lock_count, i; if (cmd == SMB2_CANCEL_HE || cmd == SMB2_CLOSE_HE || cmd == SMB2_LOGOFF_HE) return true; if (cmd != SMB2_LOCK_HE) return false; req = ksmbd_req_buf_next(work); if (req->hdr.NextCommand) len = le32_to_cpu(req->hdr.NextCommand); else { len = get_rfc1002_len(work->request_buf); if (len < work->next_smb2_rcv_hdr_off) return false; len -= work->next_smb2_rcv_hdr_off; } lock_count = le16_to_cpu(req->LockCount); if (!lock_count || len < offsetof(struct smb2_lock_req, locks) || lock_count > (len - offsetof(struct smb2_lock_req, locks)) / sizeof(struct smb2_lock_element)) return false; for (i = 0; i < lock_count; i++) { if (le32_to_cpu(req->locks[i].Flags) != SMB2_LOCKFLAG_UNLOCK) return false; } return true; } static bool smb2_session_kerberos_expired(struct ksmbd_session *sess) { return sess->kerberos_expiry && ktime_get_real_seconds() >= sess->kerberos_expiry; } /** * smb2_check_user_session() - check for valid session for a user * @work: smb work containing smb request buffer * * Return: 0 on success, otherwise error */ int smb2_check_user_session(struct ksmbd_work *work) { struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); struct ksmbd_conn *conn = work->conn; unsigned int cmd = le16_to_cpu(req_hdr->Command); unsigned long long sess_id; /* * SMB2_NEGOTIATE and SMB2_SESSION_SETUP do not require a session id. * SMB2_ECHO may omit it, but an echo carrying a session id still needs * the session attached to work so that its signature can be checked and * the response can be signed, including after Kerberos expiry. */ if (cmd == SMB2_NEGOTIATE_HE || cmd == SMB2_SESSION_SETUP_HE) return 0; sess_id = le64_to_cpu(req_hdr->SessionId); if (cmd == SMB2_ECHO_HE) { /* * ECHO remains valid without a live session, including after * LOGOFF. Attach an existing session only to authenticate a signed * ECHO and sign its response; a stale SessionId is not an error. */ if (!work->next_smb2_rcv_hdr_off && sess_id) work->sess = ksmbd_session_lookup_all_states(conn, sess_id); if (work->sess) { if (smb2_session_kerberos_expired(work->sess)) { work->sess->state = SMB2_SESSION_EXPIRED; } else if (work->sess->state != SMB2_SESSION_VALID) { ksmbd_user_session_put(work->sess); work->sess = NULL; } } return 0; } if (!ksmbd_conn_good(conn)) return -EIO; /* * If request is not the first in Compound request, * Just validate session id in header with work->sess->id. */ if (work->next_smb2_rcv_hdr_off) { if (!work->sess) { pr_err("The first operation in the compound does not have sess\n"); return -EINVAL; } if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { pr_err("session id(%llu) is different with the first operation(%lld)\n", sess_id, work->sess->id); return -EINVAL; } if (smb2_session_kerberos_expired(work->sess)) work->sess->state = SMB2_SESSION_EXPIRED; if (work->sess->state != SMB2_SESSION_VALID) { pr_err("compound request on a non-valid session (state %d)\n", work->sess->state); if (smb2_session_kerberos_expired(work->sess) && smb2_session_expired_cmd_allowed(work, cmd)) return 1; return smb2_session_kerberos_expired(work->sess) ? -EKEYEXPIRED : -EINVAL; } return 1; } /* Check for validity of user session */ work->sess = ksmbd_session_lookup_all_states(conn, sess_id); if (work->sess) { if (smb2_session_kerberos_expired(work->sess)) { work->sess->state = SMB2_SESSION_EXPIRED; return smb2_session_expired_cmd_allowed(work, cmd) ? 1 : -EKEYEXPIRED; } if (work->sess->state != SMB2_SESSION_VALID) { /* * Keep the reference for an encrypted request so the caller can * return STATUS_USER_SESSION_DELETED encrypted with the old key. */ if (work->encrypted && work->sess->state == SMB2_SESSION_EXPIRED && work->sess->enc) return -ENOENT; ksmbd_user_session_put(work->sess); work->sess = NULL; return -ENOENT; } return 1; } ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); return -ENOENT; } /** * smb2_get_name() - get filename string from on the wire smb format * @src: source buffer * @maxlen: maxlen of source string * @local_nls: nls_table pointer * * Return: matching converted filename on success, otherwise error ptr */ static char * smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) { char *name; name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); if (IS_ERR(name)) { pr_err("failed to get name %ld\n", PTR_ERR(name)); return name; } if (*name == '\0') { kfree(name); return ERR_PTR(-EINVAL); } if (*name == '\\') { pr_err("not allow directory name included leading slash\n"); kfree(name); return ERR_PTR(-EINVAL); } ksmbd_conv_path_to_unix(name); ksmbd_strip_last_slash(name); return name; } /* Link a fully initialized async work item unless the connection is closing. */ static bool ksmbd_conn_link_async_request(struct ksmbd_conn *conn, struct ksmbd_work *work) { bool linked = false; spin_lock(&conn->request_lock); if (!ksmbd_conn_exiting(conn) && !ksmbd_conn_releasing(conn)) { if (list_empty(&work->async_request_entry)) list_add_tail(&work->async_request_entry, &conn->async_requests); linked = true; } spin_unlock(&conn->request_lock); return linked; } int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) { struct ksmbd_conn *conn = work->conn; int id; id = ksmbd_acquire_async_msg_id(&conn->async_ida); if (id < 0) { pr_err("Failed to alloc async message id\n"); return id; } work->asynchronous = true; work->async_id = id; work->cancel_fn = fn; work->cancel_argv = arg; if (!ksmbd_conn_link_async_request(conn, work)) { work->asynchronous = false; work->async_id = 0; work->cancel_fn = NULL; work->cancel_argv = NULL; ksmbd_release_id(&conn->async_ida, id); return -ESHUTDOWN; } ksmbd_debug(SMB, "Send interim Response to inform async request id : %d\n", work->async_id); return 0; } void release_async_work(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; spin_lock(&conn->request_lock); list_del_init(&work->async_request_entry); spin_unlock(&conn->request_lock); work->asynchronous = 0; work->cancel_fn = NULL; kfree(work->cancel_argv); work->cancel_argv = NULL; if (work->async_id) { ksmbd_release_id(&conn->async_ida, work->async_id); work->async_id = 0; } } static int smb2_send_interim_work(struct ksmbd_work *in_work, struct ksmbd_work *work, bool eor) { int err = 0; in_work->encrypted = work->encrypted; if (work->encrypted && work->sess && work->sess->enc && work->conn->ops->encrypt_resp) { in_work->sess = work->sess; err = work->conn->ops->encrypt_resp(in_work); in_work->sess = NULL; } if (err) return err; return eor ? ksmbd_conn_write_eor(in_work) : ksmbd_conn_write(in_work); } static int smb2_send_interim_prefix_work(struct ksmbd_work *work) { struct ksmbd_work *in_work; unsigned int len, copied = 0; char *dst; int err = -ENOMEM; int i; len = get_rfc1002_len(work->iov[0].iov_base); in_work = ksmbd_alloc_work_struct(); if (!in_work) return err; in_work->response_buf = kvzalloc(len + 4, KSMBD_DEFAULT_GFP); if (!in_work->response_buf) goto out; in_work->response_sz = len + 4; in_work->conn = work->conn; dst = in_work->response_buf + 4; for (i = 1; i <= work->iov_idx; i++) { if (work->iov[i].iov_len > len - copied) { err = -EINVAL; goto out; } memcpy(dst + copied, work->iov[i].iov_base, work->iov[i].iov_len); copied += work->iov[i].iov_len; } if (copied != len) { err = -EINVAL; goto out; } err = ksmbd_iov_pin_rsp(in_work, dst, len); if (!err) err = smb2_send_interim_work(in_work, work, true); out: ksmbd_free_work_struct(in_work); return err; } static void smb2_send_interim_compound_prefix(struct ksmbd_work *work) { struct smb2_hdr *req_hdr; struct smb2_hdr *rsp_hdr; int err; if (!work->next_smb2_rcv_hdr_off || !work->next_smb2_rsp_hdr_off || work->curr_smb2_rsp_hdr_off == work->next_smb2_rsp_hdr_off || !work->iov_idx) return; req_hdr = ksmbd_req_buf_next(work); /* Detach only the final async command from the completed prefix. */ if (req_hdr->NextCommand) return; /* * The responses before the async command are sent as a standalone * compound response. The last response in this prefix must terminate * the chain. */ rsp_hdr = ksmbd_resp_buf_curr(work); rsp_hdr->NextCommand = 0; if ((rsp_hdr->Flags & SMB2_FLAGS_SIGNED) && work->sess && work->conn->ops->set_sign_rsp) work->conn->ops->set_sign_rsp(work); err = smb2_send_interim_prefix_work(work); if (err) ksmbd_debug(SMB, "failed to send compound interim prefix: %d\n", err); work->iov_idx = 0; work->iov_cnt = 0; work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; *(__be32 *)work->response_buf = 0; rsp_hdr = ksmbd_resp_buf_next(work); rsp_hdr->Flags &= ~SMB2_FLAGS_RELATED_OPERATIONS; } void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) { struct smb2_hdr *rsp_hdr; struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); if (!in_work) return; if (allocate_interim_rsp_buf(in_work)) { pr_err("smb_allocate_rsp_buf failed!\n"); ksmbd_free_work_struct(in_work); return; } if (status == STATUS_PENDING) smb2_send_interim_compound_prefix(work); in_work->conn = work->conn; memcpy(smb_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), __SMB2_HEADER_STRUCTURE_SIZE); rsp_hdr = smb_get_msg(in_work->response_buf); rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); smb2_set_err_rsp(in_work); rsp_hdr->Status = status; if (smb2_send_interim_work(in_work, work, true)) ksmbd_debug(SMB, "failed to send interim response\n"); ksmbd_free_work_struct(in_work); } static __le32 smb2_get_reparse_tag_special_file(umode_t mode) { if (S_ISDIR(mode) || S_ISREG(mode)) return 0; if (S_ISLNK(mode)) return IO_REPARSE_TAG_LX_SYMLINK_LE; else if (S_ISFIFO(mode)) return IO_REPARSE_TAG_LX_FIFO_LE; else if (S_ISSOCK(mode)) return IO_REPARSE_TAG_AF_UNIX_LE; else if (S_ISCHR(mode)) return IO_REPARSE_TAG_LX_CHR_LE; else if (S_ISBLK(mode)) return IO_REPARSE_TAG_LX_BLK_LE; return 0; } /** * smb2_get_dos_mode() - get file mode in dos format from unix mode * @stat: kstat containing file mode * @attribute: attribute flags * * Return: converted dos mode */ static int smb2_get_dos_mode(struct kstat *stat, int attribute) { int attr = 0; if (S_ISDIR(stat->mode)) { attr = FILE_ATTRIBUTE_DIRECTORY | (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); } else { attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; attr &= ~(FILE_ATTRIBUTE_DIRECTORY); if (smb2_get_reparse_tag_special_file(stat->mode)) attr |= FILE_ATTRIBUTE_REPARSE_POINT; } return attr; } static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, __le16 hash_id) { pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; pneg_ctxt->DataLength = cpu_to_le16(38); pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); pneg_ctxt->Reserved = cpu_to_le32(0); pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); pneg_ctxt->HashAlgorithms = hash_id; } static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, __le16 cipher_type) { pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; pneg_ctxt->DataLength = cpu_to_le16(4); pneg_ctxt->Reserved = cpu_to_le32(0); pneg_ctxt->CipherCount = cpu_to_le16(1); pneg_ctxt->Ciphers[0] = cipher_type; } static void build_compress_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt, __le16 compress_algorithm, bool compress_chained, bool compress_pattern) { /* * Return only algorithms implemented by ksmbd. Pattern_V1 is advertised * as a second ID when the client also enabled chained transforms. */ pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES; pneg_ctxt->DataLength = cpu_to_le16(compress_pattern ? 12 : 10); pneg_ctxt->Reserved = cpu_to_le32(0); pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(compress_pattern ? 2 : 1); pneg_ctxt->Padding = cpu_to_le16(0); pneg_ctxt->Flags = compress_chained ? SMB2_COMPRESSION_CAPABILITIES_FLAG_CHAINED : SMB2_COMPRESSION_CAPABILITIES_FLAG_NONE; pneg_ctxt->CompressionAlgorithms[0] = compress_algorithm; pneg_ctxt->CompressionAlgorithms[1] = compress_pattern ? SMB3_COMPRESS_PATTERN : 0; pneg_ctxt->CompressionAlgorithms[2] = 0; pneg_ctxt->CompressionAlgorithms[3] = 0; } /** * build_rdma_ctx() - build an RDMA transform negotiate response context * @ctxt: response context header to populate * @transform_ids: bitmap of transforms common to the client and server * * Return: encoded negotiate context length */ static int build_rdma_ctx(struct smb2_neg_context *ctxt, unsigned long transform_ids) { struct smb2_rdma_transform_capabilities_context *pneg_ctxt; int count = 0; pneg_ctxt = (void *)ctxt; pneg_ctxt->ContextType = SMB2_RDMA_TRANSFORM_CAPABILITIES; pneg_ctxt->Reserved = 0; pneg_ctxt->Reserved1 = 0; pneg_ctxt->Reserved2 = 0; if (transform_ids & BIT(SMB2_RDMA_TRANSFORM_ENCRYPTION)) pneg_ctxt->RDMATransformIds[count++] = cpu_to_le16(SMB2_RDMA_TRANSFORM_ENCRYPTION); if (!count) pneg_ctxt->RDMATransformIds[count++] = cpu_to_le16(SMB2_RDMA_TRANSFORM_NONE); pneg_ctxt->TransformCount = cpu_to_le16(count); pneg_ctxt->DataLength = cpu_to_le16(8 + count * sizeof(__le16)); return sizeof(struct smb2_neg_context) + le16_to_cpu(pneg_ctxt->DataLength); } static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, __le16 sign_algo) { pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; pneg_ctxt->DataLength = cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) - sizeof(struct smb2_neg_context)); pneg_ctxt->Reserved = cpu_to_le32(0); pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); pneg_ctxt->SigningAlgorithms[0] = sign_algo; } static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) { pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ pneg_ctxt->Name[0] = 0x93; pneg_ctxt->Name[1] = 0xAD; pneg_ctxt->Name[2] = 0x25; pneg_ctxt->Name[3] = 0x50; pneg_ctxt->Name[4] = 0x9C; pneg_ctxt->Name[5] = 0xB4; pneg_ctxt->Name[6] = 0x11; pneg_ctxt->Name[7] = 0xE7; pneg_ctxt->Name[8] = 0xB4; pneg_ctxt->Name[9] = 0x23; pneg_ctxt->Name[10] = 0x83; pneg_ctxt->Name[11] = 0xDE; pneg_ctxt->Name[12] = 0x96; pneg_ctxt->Name[13] = 0x8B; pneg_ctxt->Name[14] = 0xCD; pneg_ctxt->Name[15] = 0x7C; } static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, struct smb2_negotiate_rsp *rsp) { char * const pneg_ctxt = (char *)rsp + le32_to_cpu(rsp->NegotiateContextOffset); int neg_ctxt_cnt = 1; int ctxt_size; ksmbd_debug(SMB, "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, conn->preauth_info->Preauth_HashId); ctxt_size = sizeof(struct smb2_preauth_neg_context); if (conn->cipher_type) { /* Round to 8 byte boundary */ ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); build_encrypt_ctxt((struct smb2_encryption_neg_context *) (pneg_ctxt + ctxt_size), conn->cipher_type); neg_ctxt_cnt++; ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; } if (conn->compress_algorithm != SMB3_COMPRESS_NONE) { ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_COMPRESSION_CAPABILITIES context\n"); build_compress_ctxt((struct smb2_compression_capabilities_context *) (pneg_ctxt + ctxt_size), conn->compress_algorithm, conn->compress_chained, conn->compress_pattern); neg_ctxt_cnt++; ctxt_size += sizeof(struct smb2_neg_context) + (conn->compress_pattern ? 12 : 10); } if (conn->rdma_transform_negotiated) { struct smb2_neg_context *rdma_ctxt; ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_RDMA_TRANSFORM_CAPABILITIES context\n"); rdma_ctxt = (void *)(pneg_ctxt + ctxt_size); ctxt_size += build_rdma_ctx(rdma_ctxt, conn->rdma_transform_ids); neg_ctxt_cnt++; } if (conn->posix_ext_supported) { ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); build_posix_ctxt((struct smb2_posix_neg_context *) (pneg_ctxt + ctxt_size)); neg_ctxt_cnt++; ctxt_size += sizeof(struct smb2_posix_neg_context); } if (conn->signing_negotiated) { ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_SIGNING_CAPABILITIES context\n"); build_sign_cap_ctxt((struct smb2_signing_capabilities *) (pneg_ctxt + ctxt_size), conn->signing_algorithm); neg_ctxt_cnt++; ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; } rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); return ctxt_size + AUTH_GSS_PADDING; } static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, struct smb2_preauth_neg_context *pneg_ctxt, int ctxt_len) { /* * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, * which may not be present. Only check for used HashAlgorithms[1]. */ if (ctxt_len < sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) return STATUS_INVALID_PARAMETER; if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) return STATUS_SMB_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; return STATUS_SUCCESS; } static void decode_encrypt_ctxt(struct ksmbd_conn *conn, struct smb2_encryption_neg_context *pneg_ctxt, int ctxt_len) { int cph_cnt; int i, cphs_size; if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); return; } conn->cipher_type = 0; cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); cphs_size = cph_cnt * sizeof(__le16); if (sizeof(struct smb2_encryption_neg_context) + cphs_size > ctxt_len) { pr_err("Invalid cipher count(%d)\n", cph_cnt); return; } if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) return; for (i = 0; i < cph_cnt; i++) { if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { ksmbd_debug(SMB, "Cipher ID = 0x%x\n", pneg_ctxt->Ciphers[i]); conn->cipher_type = pneg_ctxt->Ciphers[i]; break; } } } /** * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption * @conn: smb connection * * Return: true if connection should be encrypted, else false */ bool smb3_encryption_negotiated(struct ksmbd_conn *conn) { if (!conn->ops->generate_encryptionkey) return false; /* * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. * SMB 3.1.1 uses the cipher_type field. */ return (conn->vals->req_capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || conn->cipher_type; } static __le32 decode_compress_ctxt(struct ksmbd_conn *conn, struct smb2_compression_capabilities_context *pneg_ctxt, int ctxt_len) { int alg_cnt, algs_size, i; __le16 *algs; if (sizeof(struct smb2_neg_context) + 10 > ctxt_len) { pr_err("Invalid SMB2_COMPRESSION_CAPABILITIES context length\n"); return STATUS_INVALID_PARAMETER; } conn->compress_algorithm = SMB3_COMPRESS_NONE; conn->compress_chained = false; conn->compress_pattern = false; alg_cnt = le16_to_cpu(pneg_ctxt->CompressionAlgorithmCount); if (!alg_cnt) return STATUS_INVALID_PARAMETER; if (pneg_ctxt->Flags != SMB2_COMPRESSION_CAPABILITIES_FLAG_NONE && pneg_ctxt->Flags != SMB2_COMPRESSION_CAPABILITIES_FLAG_CHAINED) return STATUS_INVALID_PARAMETER; algs_size = alg_cnt * sizeof(__le16); if (sizeof(struct smb2_neg_context) + 8 + algs_size > ctxt_len) { pr_err("Invalid compression algorithm count(%d)\n", alg_cnt); return STATUS_INVALID_PARAMETER; } /* * CompressionAlgorithms[] is declared as a fixed 4-element array, but * the actual element count is variable (clients such as Windows may * advertise more). The on-wire length was validated above, so walk the * algorithms through a pointer to avoid a fixed-array bounds check. */ algs = pneg_ctxt->CompressionAlgorithms; for (i = 0; i < alg_cnt; i++) { __le16 alg = algs[i]; /* * LZ77 is the required general-purpose codec. Pattern_V1 is an * optional chained payload type and cannot stand alone. */ if (alg == SMB3_COMPRESS_LZ77) { conn->compress_algorithm = alg; conn->compress_chained = pneg_ctxt->Flags == SMB2_COMPRESSION_CAPABILITIES_FLAG_CHAINED; ksmbd_debug(SMB, "Compression Algorithm ID = 0x%x\n", le16_to_cpu(alg)); } else if (alg == SMB3_COMPRESS_PATTERN) { conn->compress_pattern = true; } } if (conn->compress_algorithm == SMB3_COMPRESS_NONE || !conn->compress_chained) conn->compress_pattern = false; return STATUS_SUCCESS; } static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, struct smb2_signing_capabilities *pneg_ctxt, int ctxt_len) { int sign_algo_cnt; int i, sign_alos_size; if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); return; } conn->signing_negotiated = false; sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); sign_alos_size = sign_algo_cnt * sizeof(__le16); if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > ctxt_len) { pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); return; } for (i = 0; i < sign_algo_cnt; i++) { if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", pneg_ctxt->SigningAlgorithms[i]); conn->signing_negotiated = true; conn->signing_algorithm = pneg_ctxt->SigningAlgorithms[i]; break; } } } /** * decode_rdma_ctx() - decode an RDMA transform negotiate request context * @conn: connection being negotiated * @ctxt: request context header to decode * @ctxt_len: total context length, including the negotiate context header * * Record transforms supported by both peers only for SMB Direct connections. * * Return: NT status describing the decode result */ static __le32 decode_rdma_ctx(struct ksmbd_conn *conn, struct smb2_neg_context *ctxt, int ctxt_len) { struct smb2_rdma_transform_capabilities_context *pneg_ctxt; unsigned int count, i; pneg_ctxt = (void *)ctxt; /* RDMA transforms are a node capability, not just a transport capability. */ if (!ksmbd_rdma_enabled()) return STATUS_SUCCESS; if (ctxt_len < sizeof(*pneg_ctxt)) return STATUS_INVALID_PARAMETER; count = le16_to_cpu(pneg_ctxt->TransformCount); if (!count || count > (ctxt_len - sizeof(*pneg_ctxt)) / sizeof(__le16)) return STATUS_INVALID_PARAMETER; conn->rdma_transform_negotiated = true; conn->rdma_transform_ids = 0; for (i = 0; i < count; i++) { u16 id = le16_to_cpu(pneg_ctxt->RDMATransformIds[i]); if (id == SMB2_RDMA_TRANSFORM_ENCRYPTION) conn->rdma_transform_ids |= BIT(id); } return STATUS_SUCCESS; } static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, struct smb2_negotiate_req *req, unsigned int len_of_smb) { /* +4 is to account for the RFC1001 len field */ struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; int i = 0, len_of_ctxts; unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); __le32 status = STATUS_INVALID_PARAMETER; int compress_ctxt_cnt = 0, rdma_transform_ctxt_cnt = 0; ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); if (len_of_smb <= offset) { ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); return status; } len_of_ctxts = len_of_smb - offset; while (i++ < neg_ctxt_cnt) { int clen, ctxt_len; if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) break; pctx = (struct smb2_neg_context *)((char *)pctx + offset); clen = le16_to_cpu(pctx->DataLength); ctxt_len = clen + sizeof(struct smb2_neg_context); if (ctxt_len > len_of_ctxts) break; if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); if (conn->preauth_info->Preauth_HashId) break; status = decode_preauth_ctxt(conn, (struct smb2_preauth_neg_context *)pctx, ctxt_len); if (status != STATUS_SUCCESS) break; } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); if (conn->cipher_type) break; decode_encrypt_ctxt(conn, (struct smb2_encryption_neg_context *)pctx, ctxt_len); } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); if (compress_ctxt_cnt++) { status = STATUS_INVALID_PARAMETER; break; } status = decode_compress_ctxt(conn, (struct smb2_compression_capabilities_context *) pctx, ctxt_len); if (status != STATUS_SUCCESS) break; } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { ksmbd_debug(SMB, "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); } else if (pctx->ContextType == SMB2_RDMA_TRANSFORM_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_RDMA_TRANSFORM_CAPABILITIES context\n"); if (ksmbd_rdma_enabled() && rdma_transform_ctxt_cnt++) { status = STATUS_INVALID_PARAMETER; break; } status = decode_rdma_ctx(conn, pctx, ctxt_len); if (status != STATUS_SUCCESS) break; } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { ksmbd_debug(SMB, "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); conn->posix_ext_supported = true; } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_SIGNING_CAPABILITIES context\n"); decode_sign_cap_ctxt(conn, (struct smb2_signing_capabilities *)pctx, ctxt_len); } /* offsets must be 8 byte aligned */ offset = (ctxt_len + 7) & ~0x7; len_of_ctxts -= offset; } return status; } /** * smb2_handle_negotiate() - handler for smb2 negotiate command * @work: smb work containing smb request buffer * * The caller holds conn->srv_mutex. * * Return: 0 */ int smb2_handle_negotiate(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_negotiate_req *req = smb_get_msg(work->request_buf); struct smb2_negotiate_rsp *rsp = smb_get_msg(work->response_buf); int rc = 0; unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; __le32 status; ksmbd_debug(SMB, "Received negotiate request\n"); conn->need_neg = false; smb2_buf_len = get_rfc1002_len(work->request_buf); smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); if (smb2_neg_size > smb2_buf_len) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (req->DialectCount == 0) { pr_err("malformed packet\n"); rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (conn->dialect == SMB311_PROT_ID) { unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); if (smb2_buf_len < nego_ctxt_off) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (smb2_neg_size > nego_ctxt_off) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > nego_ctxt_off) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } } else { if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > smb2_buf_len) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } } conn->cli_cap = le32_to_cpu(req->Capabilities); switch (conn->dialect) { case SMB311_PROT_ID: conn->preauth_info = kzalloc_obj(struct preauth_integrity_info, KSMBD_DEFAULT_GFP); if (!conn->preauth_info) { rc = -ENOMEM; rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; goto err_out; } status = deassemble_neg_contexts(conn, req, get_rfc1002_len(work->request_buf)); if (status != STATUS_SUCCESS) { pr_err("deassemble_neg_contexts error(0x%x)\n", status); rsp->hdr.Status = status; rc = -EINVAL; kfree(conn->preauth_info); conn->preauth_info = NULL; goto err_out; } if (!conn->cipher_type) conn->rdma_transform_ids &= ~BIT(SMB2_RDMA_TRANSFORM_ENCRYPTION); ksmbd_debug(RDMA, "RDMA transform negotiation: transport=%s context=%s encryption=%s cipher=0x%04x\n", conn->transport->ops->rdma_read ? "rdma" : "tcp", conn->rdma_transform_negotiated ? "present" : "absent", conn->rdma_transform_ids & BIT(SMB2_RDMA_TRANSFORM_ENCRYPTION) ? "enabled" : "disabled", le16_to_cpu(conn->cipher_type)); rc = init_smb3_11_server(conn); if (rc < 0) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; kfree(conn->preauth_info); conn->preauth_info = NULL; goto err_out; } ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, conn->preauth_info->Preauth_HashValue); rsp->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT); neg_ctxt_len = assemble_neg_contexts(conn, rsp); break; case SMB302_PROT_ID: init_smb3_02_server(conn); break; case SMB30_PROT_ID: init_smb3_0_server(conn); break; case SMB21_PROT_ID: init_smb2_1_server(conn); break; case SMB2X_PROT_ID: case BAD_PROT_ID: default: ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", conn->dialect); rsp->hdr.Status = STATUS_NOT_SUPPORTED; rc = -EINVAL; goto err_out; } rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); /* For stats */ conn->connection_type = conn->dialect; rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); memcpy(conn->ClientGUID, req->ClientGUID, SMB2_CLIENT_GUID_SIZE); conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); rsp->StructureSize = cpu_to_le16(65); rsp->DialectRevision = cpu_to_le16(conn->dialect); /* Not setting conn guid rsp->ServerGUID, as it * not used by client for identifying server */ memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); rsp->SystemTime = cpu_to_le64(ksmbd_systime()); rsp->ServerStartTime = 0; ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", le32_to_cpu(rsp->NegotiateContextOffset), le16_to_cpu(rsp->NegotiateContextCount)); rsp->SecurityBufferOffset = cpu_to_le16(128); rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + le16_to_cpu(rsp->SecurityBufferOffset)); rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; conn->use_spnego = true; if (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) conn->sign = true; if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { server_conf.enforced_signing = true; rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; conn->sign = true; } conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); ksmbd_conn_set_need_setup(conn); err_out: if (rc && rsp->hdr.Status == STATUS_SUCCESS) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; if (!rc) rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH + neg_ctxt_len); if (rc < 0) smb2_set_err_rsp(work); return rc; } static int alloc_preauth_hash(struct ksmbd_session *sess, struct ksmbd_conn *conn) { if (sess->Preauth_HashValue) return 0; if (!conn->preauth_info) return -ENOMEM; sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, PREAUTH_HASHVALUE_SIZE, KSMBD_DEFAULT_GFP); if (!sess->Preauth_HashValue) return -ENOMEM; return 0; } static int generate_preauth_hash(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; u8 *preauth_hash; if (conn->dialect != SMB311_PROT_ID) return 0; if (conn->binding) { struct preauth_session *preauth_sess; preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); if (!preauth_sess) { preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); if (!preauth_sess) return -ENOMEM; } preauth_hash = preauth_sess->Preauth_HashValue; } else { if (!sess->Preauth_HashValue) if (alloc_preauth_hash(sess, conn)) return -ENOMEM; preauth_hash = sess->Preauth_HashValue; } ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); return 0; } static int decode_negotiation_token(struct ksmbd_conn *conn, struct negotiate_message *negblob, size_t sz) { if (!conn->use_spnego) return -EINVAL; if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; conn->use_spnego = false; } } return 0; } static int ntlm_negotiate(struct ksmbd_work *work, struct negotiate_message *negblob, size_t negblob_len, struct smb2_sess_setup_rsp *rsp) { struct challenge_message *chgblob; unsigned char *spnego_blob = NULL; u16 spnego_blob_len; char *neg_blob; int sz, rc; ksmbd_debug(SMB, "negotiate phase\n"); rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); if (rc) return rc; sz = le16_to_cpu(rsp->SecurityBufferOffset); chgblob = (struct challenge_message *)rsp->Buffer; memset(chgblob, 0, sizeof(struct challenge_message)); if (!work->conn->use_spnego) { sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); if (sz < 0) return -ENOMEM; rsp->SecurityBufferLength = cpu_to_le16(sz); return 0; } sz = sizeof(struct challenge_message); sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; neg_blob = kzalloc(sz, KSMBD_DEFAULT_GFP); if (!neg_blob) return -ENOMEM; chgblob = (struct challenge_message *)neg_blob; sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); if (sz < 0) { rc = -ENOMEM; goto out; } rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, neg_blob, sz); if (rc) { rc = -ENOMEM; goto out; } memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); out: kfree(spnego_blob); kfree(neg_blob); return rc; } static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, struct smb2_sess_setup_req *req) { int sz; if (conn->use_spnego && conn->mechToken) return (struct authenticate_message *)conn->mechToken; sz = le16_to_cpu(req->SecurityBufferOffset); return (struct authenticate_message *)((char *)&req->hdr.ProtocolId + sz); } static struct ksmbd_user *session_user(struct ksmbd_conn *conn, struct smb2_sess_setup_req *req) { struct authenticate_message *authblob; struct ksmbd_user *user; char *name; unsigned int name_off, name_len, secbuf_len; if (conn->use_spnego && conn->mechToken) secbuf_len = conn->mechTokenLen; else secbuf_len = le16_to_cpu(req->SecurityBufferLength); if (secbuf_len < sizeof(struct authenticate_message)) { ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); return NULL; } authblob = user_authblob(conn, req); name_off = le32_to_cpu(authblob->UserName.BufferOffset); name_len = le16_to_cpu(authblob->UserName.Length); if (secbuf_len < (u64)name_off + name_len) return NULL; name = smb_strndup_from_utf16((const char *)authblob + name_off, name_len, true, conn->local_nls); if (IS_ERR(name)) { pr_err("cannot allocate memory\n"); return NULL; } ksmbd_debug(SMB, "session setup request for user %s\n", name); user = ksmbd_login_user(name); kfree(name); return user; } static int ntlm_authenticate(struct ksmbd_work *work, struct smb2_sess_setup_req *req, struct smb2_sess_setup_rsp *rsp) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct ksmbd_user *user; char channel_key[CIFS_KEY_SIZE] = {}; char *auth_key = conn->binding ? channel_key : sess->sess_key; u64 prev_id; bool binding = conn->binding; int sz, rc; ksmbd_debug(SMB, "authenticate phase\n"); if (conn->use_spnego) { unsigned char *spnego_blob; u16 spnego_blob_len; rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, &spnego_blob_len, 0); if (rc) return -ENOMEM; memcpy(rsp->Buffer, spnego_blob, spnego_blob_len); rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); kfree(spnego_blob); } user = session_user(conn, req); if (!user) { ksmbd_debug(SMB, "Unknown user name or an error\n"); return -EPERM; } if (sess->state == SMB2_SESSION_VALID) { /* * Reuse session if anonymous try to connect * on reauthetication. */ if (conn->binding == false && ksmbd_anonymous_user(user)) { ksmbd_free_user(user); return 0; } if (!ksmbd_compare_user(sess->user, user)) { ksmbd_free_user(user); return -EKEYREJECTED; } ksmbd_free_user(user); } else { sess->user = user; } if (conn->binding == false && user_guest(sess->user)) { rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; } else { struct authenticate_message *authblob; authblob = user_authblob(conn, req); if (conn->use_spnego && conn->mechToken) sz = conn->mechTokenLen; else sz = le16_to_cpu(req->SecurityBufferLength); rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess, auth_key); if (rc) { set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); ksmbd_debug(SMB, "authentication failed\n"); rc = -EPERM; goto out; } } prev_id = le64_to_cpu(req->PreviousSessionId); if (prev_id && prev_id != sess->id) destroy_previous_session(conn, sess->user, prev_id); /* * If session state is SMB2_SESSION_VALID, We can assume * that it is reauthentication. And the user/password * has been verified, so return it here. */ if (sess->state == SMB2_SESSION_VALID) { if (conn->binding) goto binding_session; return 0; } if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && (conn->sign || server_conf.enforced_signing)) || (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) sess->sign = true; if (smb3_encryption_negotiated(conn) && !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { conn->ops->generate_encryptionkey(conn, sess); sess->enc = true; if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; /* * signing is disable if encryption is enable * on this session */ sess->sign = false; } binding_session: if (conn->dialect >= SMB30_PROT_ID) { rc = register_session_channel(sess, conn, auth_key); if (rc) goto out; } if (conn->ops->generate_signingkey) { rc = conn->ops->generate_signingkey(sess, conn); if (rc) { ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); rc = -EINVAL; goto out; } } if (!ksmbd_conn_lookup_dialect(conn)) { pr_err("fail to verify the dialect\n"); rc = -ENOENT; goto out; } rc = 0; out: if (binding) memzero_explicit(channel_key, sizeof(channel_key)); return rc; } #ifdef CONFIG_SMB_SERVER_KERBEROS5 static int krb5_authenticate(struct ksmbd_work *work, struct smb2_sess_setup_req *req, struct smb2_sess_setup_rsp *rsp) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; char *in_blob, *out_blob; char channel_key[CIFS_KEY_SIZE] = {}; char reauth_key[CIFS_KEY_SIZE] = {}; char *auth_key = conn->binding ? channel_key : (work->session_setup_reauth ? reauth_key : sess->sess_key); u64 prev_sess_id; bool binding = conn->binding; int in_len, out_len; int retval; in_blob = (char *)&req->hdr.ProtocolId + le16_to_cpu(req->SecurityBufferOffset); in_len = le16_to_cpu(req->SecurityBufferLength); out_blob = (char *)&rsp->hdr.ProtocolId + le16_to_cpu(rsp->SecurityBufferOffset); out_len = work->response_sz - work->next_smb2_rsp_hdr_off - (le16_to_cpu(rsp->SecurityBufferOffset) + 4); retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, out_blob, &out_len, auth_key); if (retval) { ksmbd_debug(SMB, "krb5 authentication failed\n"); if (retval != -EKEYREJECTED) retval = -EPERM; goto out; } /* Check previous session */ prev_sess_id = le64_to_cpu(req->PreviousSessionId); if (prev_sess_id && prev_sess_id != sess->id) destroy_previous_session(conn, sess->user, prev_sess_id); rsp->SecurityBufferLength = cpu_to_le16(out_len); /* * If session state is SMB2_SESSION_VALID, We can assume * that it is reauthentication. And the user/password * has been verified, so return it here. */ if (sess->state == SMB2_SESSION_VALID && !work->session_setup_reauth) { if (conn->binding) goto binding_session; return 0; } /* * Reauthentication verifies the new Kerberos credentials but keeps * the established SMB session keys. */ if (work->session_setup_reauth) { retval = 0; goto out; } if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && (conn->sign || server_conf.enforced_signing)) || (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) sess->sign = true; if (smb3_encryption_negotiated(conn) && !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { conn->ops->generate_encryptionkey(conn, sess); sess->enc = true; if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; sess->sign = false; } binding_session: if (conn->dialect >= SMB30_PROT_ID) { retval = register_session_channel(sess, conn, auth_key); if (retval) goto out; } if (conn->ops->generate_signingkey) { retval = conn->ops->generate_signingkey(sess, conn); if (retval) { ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); retval = -EINVAL; goto out; } } if (!ksmbd_conn_lookup_dialect(conn)) { pr_err("fail to verify the dialect\n"); retval = -ENOENT; goto out; } retval = 0; out: memzero_explicit(reauth_key, sizeof(reauth_key)); if (binding) memzero_explicit(channel_key, sizeof(channel_key)); return retval; } #else static int krb5_authenticate(struct ksmbd_work *work, struct smb2_sess_setup_req *req, struct smb2_sess_setup_rsp *rsp) { return -EOPNOTSUPP; } #endif int smb2_sess_setup(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_sess_setup_req *req; struct smb2_sess_setup_rsp *rsp; struct ksmbd_session *sess; struct negotiate_message *negblob; unsigned int negblob_len, negblob_off; int rc = 0; ksmbd_debug(SMB, "Received smb2 session setup request\n"); if (!ksmbd_conn_need_setup(conn) && !ksmbd_conn_good(conn)) { work->send_no_response = 1; return rc; } WORK_BUFFERS(work, req, rsp); rsp->StructureSize = cpu_to_le16(9); rsp->SessionFlags = 0; rsp->SecurityBufferOffset = cpu_to_le16(72); rsp->SecurityBufferLength = 0; ksmbd_conn_lock(conn); if (!req->hdr.SessionId) { sess = ksmbd_smb2_session_create(); if (!sess) { rc = -ENOMEM; goto out_err; } rsp->hdr.SessionId = cpu_to_le64(sess->id); rc = ksmbd_session_register(conn, sess); if (rc) goto out_err; conn->binding = false; } else if (conn->dialect >= SMB30_PROT_ID && (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { u64 sess_id = le64_to_cpu(req->hdr.SessionId); sess = ksmbd_session_lookup_slowpath(sess_id); if (!sess) { rc = -ENOENT; goto out_err; } if (conn->dialect != sess->dialect) { rc = -EINVAL; goto out_err; } if (conn->dialect == SMB311_PROT_ID) { struct channel *chann; unsigned long index; down_read(&sess->chann_lock); xa_for_each(&sess->ksmbd_chann_list, index, chann) { if (conn->cipher_type != chann->conn->cipher_type) rc = -EINVAL; break; } up_read(&sess->chann_lock); if (rc) goto out_err; } if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { rc = -EINVAL; goto out_err; } if (memcmp(conn->ClientGUID, sess->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { rc = -ENOENT; goto out_err; } if (sess->state == SMB2_SESSION_IN_PROGRESS) { rc = -EACCES; goto out_err; } if (sess->state == SMB2_SESSION_EXPIRED) { rc = -EFAULT; goto out_err; } if (ksmbd_conn_need_reconnect(conn)) { rc = -EFAULT; ksmbd_user_session_put(sess); sess = NULL; goto out_err; } if (is_ksmbd_session_in_connection(conn, sess_id)) { rc = -EACCES; goto out_err; } if (user_guest(sess->user)) { rc = -EOPNOTSUPP; goto out_err; } conn->binding = true; } else if ((conn->dialect < SMB30_PROT_ID || server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { sess = ksmbd_session_lookup_slowpath(le64_to_cpu(req->hdr.SessionId)); if (sess) { int sign_ret; work->sess = sess; if (sess->dialect >= SMB30_PROT_ID) sign_ret = smb3_check_sign_req(work); else sign_ret = smb2_check_sign_req(work); if (sess->state != SMB2_SESSION_VALID || !(req->hdr.Flags & SMB2_FLAGS_SIGNED) || !sign_ret) { ksmbd_user_session_put(sess); work->sess = NULL; sess = NULL; } } rc = -EACCES; goto out_err; } else { sess = ksmbd_session_lookup(conn, le64_to_cpu(req->hdr.SessionId)); if (!sess) { sess = ksmbd_session_lookup_slowpath(le64_to_cpu(req->hdr.SessionId)); if (sess && !lookup_chann_list(sess, conn)) { ksmbd_user_session_put(sess); sess = NULL; } } if (!sess) { rc = -ENOENT; goto out_err; } if (sess->state == SMB2_SESSION_EXPIRED) { if (sess->kerberos_expiry && ktime_get_real_seconds() >= sess->kerberos_expiry) { work->session_setup_reauth = true; } else { rc = -EFAULT; goto out_err; } } if (ksmbd_conn_need_reconnect(conn)) { rc = -EFAULT; ksmbd_user_session_put(sess); sess = NULL; goto out_err; } conn->binding = false; } work->sess = sess; negblob_off = le16_to_cpu(req->SecurityBufferOffset); negblob_len = le16_to_cpu(req->SecurityBufferLength); if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { rc = -EINVAL; goto out_err; } negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + negblob_off); if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { if (conn->mechToken) { negblob = (struct negotiate_message *)conn->mechToken; negblob_len = conn->mechTokenLen; } } if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { rc = -EINVAL; goto out_err; } if (server_conf.auth_mechs & conn->auth_mechs) { rc = generate_preauth_hash(work); if (rc) goto out_err; if (conn->preferred_auth_mech & (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { rc = krb5_authenticate(work, req, rsp); if (rc) goto out_err; if (!ksmbd_conn_need_reconnect(conn)) { ksmbd_conn_set_good(conn); sess->state = SMB2_SESSION_VALID; } } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { if (negblob->MessageType == NtLmNegotiate) { rc = ntlm_negotiate(work, negblob, negblob_len, rsp); if (rc) goto out_err; rsp->hdr.Status = STATUS_MORE_PROCESSING_REQUIRED; } else if (negblob->MessageType == NtLmAuthenticate) { rc = ntlm_authenticate(work, req, rsp); if (rc) goto out_err; if (!ksmbd_conn_need_reconnect(conn)) { ksmbd_conn_set_good(conn); sess->state = SMB2_SESSION_VALID; } if (conn->binding) { struct preauth_session *preauth_sess; preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); if (preauth_sess) { list_del(&preauth_sess->preauth_entry); kfree_sensitive(preauth_sess); } } } else { pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", le32_to_cpu(negblob->MessageType)); rc = -EINVAL; } } else { /* TODO: need one more negotiation */ pr_err("Not support the preferred authentication\n"); rc = -EINVAL; } } else { pr_err("Not support authentication\n"); rc = -EINVAL; } out_err: if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_USER_SESSION_DELETED; else if (rc == -EACCES) rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; else if (rc == -EFAULT) rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; else if (rc == -ENOMEM || rc == -ENOSPC) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; else if (rc == -EOPNOTSUPP) rsp->hdr.Status = STATUS_NOT_SUPPORTED; else if (rc == -EKEYREJECTED) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (rc) rsp->hdr.Status = STATUS_LOGON_FAILURE; if ((rsp->hdr.Status == STATUS_USER_SESSION_DELETED || (rsp->hdr.Status == STATUS_INVALID_PARAMETER && (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING))) && (req->hdr.Flags & SMB2_FLAGS_SIGNED)) rsp->hdr.Flags |= SMB2_FLAGS_SIGNED; if (conn->mechToken) { kfree(conn->mechToken); conn->mechToken = NULL; } if (rc < 0) { if (sess && conn->dialect == SMB311_PROT_ID && (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { struct preauth_session *preauth_sess; preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); if (preauth_sess) { list_del(&preauth_sess->preauth_entry); kfree_sensitive(preauth_sess); } } /* * SecurityBufferOffset should be set to zero * in session setup error response. */ rsp->SecurityBufferOffset = 0; if (sess) { bool try_delay = false; /* * To avoid dictionary attacks (repeated session setups rapidly sent) to * connect to server, ksmbd make a delay of a 5 seconds on session setup * failure to make it harder to send enough random connection requests * to break into a server. */ if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) try_delay = true; /* * For binding requests, session belongs to another * connection. Do not expire it. */ if (!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { sess->last_active = jiffies; sess->kerberos_expiry = 0; sess->state = SMB2_SESSION_EXPIRED; } /* * Keep the binding session reference until the response is * signed and sent. Error responses for a signed binding * request are signed with the existing session signing key. */ if (!(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) || work->sess != sess) { ksmbd_user_session_put(sess); work->sess = NULL; } if (try_delay) { ksmbd_conn_set_need_reconnect(conn); ssleep(5); ksmbd_conn_set_need_setup(conn); } } smb2_set_err_rsp(work); conn->binding = false; } else { unsigned int iov_len; if (rsp->SecurityBufferLength) iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + le16_to_cpu(rsp->SecurityBufferLength); else iov_len = sizeof(struct smb2_sess_setup_rsp); rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); if (rc) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; } ksmbd_conn_unlock(conn); return rc; } /** * smb2_tree_connect() - handler for smb2 tree connect command * @work: smb work containing smb request buffer * * Return: 0 on success, otherwise error */ int smb2_tree_connect(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_tree_connect_req *req; struct smb2_tree_connect_rsp *rsp; struct ksmbd_session *sess = work->sess; char *treename = NULL, *name = NULL; struct ksmbd_tree_conn_status status; struct ksmbd_tree_connect *tree_conn = NULL; struct ksmbd_share_config *share = NULL; int rc = -EINVAL; ksmbd_debug(SMB, "Received smb2 tree connect request\n"); WORK_BUFFERS(work, req, rsp); treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset), le16_to_cpu(req->PathLength), true, conn->local_nls); if (IS_ERR(treename)) { pr_err("treename is NULL\n"); status.ret = KSMBD_TREE_CONN_STATUS_ERROR; goto out_err1; } name = ksmbd_extract_sharename(conn->um, treename); if (IS_ERR(name)) { status.ret = KSMBD_TREE_CONN_STATUS_ERROR; goto out_err1; } ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", name, treename); status = ksmbd_tree_conn_connect(work, name); if (status.ret == KSMBD_TREE_CONN_STATUS_OK) { tree_conn = status.tree_conn; rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); share = status.tree_conn->share_conf; /* A share that requires encryption needs a negotiated SMB3 cipher. */ if (test_share_config_flag(share, KSMBD_SHARE_FLAG_ENCRYPT_DATA) && !smb3_encryption_negotiated(conn)) { ksmbd_tree_conn_disconnect(sess, status.tree_conn); status.tree_conn = NULL; share = NULL; status.ret = KSMBD_TREE_CONN_STATUS_ERROR; goto out_err1; } } else goto out_err1; if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC share path request\n"); rsp->ShareType = SMB2_SHARE_TYPE_PIPE; rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | FILE_DELETE_LE | FILE_READ_CONTROL_LE | FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | FILE_SYNCHRONIZE_LE; } else { rsp->ShareType = SMB2_SHARE_TYPE_DISK; rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; if (test_tree_conn_flag(status.tree_conn, KSMBD_TREE_CONN_FLAG_WRITABLE)) { rsp->MaximalAccess |= FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | FILE_SYNCHRONIZE_LE; } } status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); if (conn->posix_ext_supported) status.tree_conn->posix_extensions = true; down_write(&sess->tree_conns_lock); if (status.tree_conn->t_state == TREE_DISCONNECTED) { status.ret = KSMBD_TREE_CONN_STATUS_ERROR; share = NULL; } else { status.tree_conn->t_state = TREE_CONNECTED; } up_write(&sess->tree_conns_lock); if (status.ret != KSMBD_TREE_CONN_STATUS_OK) goto out_err1; rsp->StructureSize = cpu_to_le16(16); out_err1: /* * A configured CA share is not continuously available until persistent * open recovery, ownership fencing, and failover are implemented. */ rsp->Capabilities = 0; rsp->Reserved = 0; /* default manual caching */ rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; /* Tell the client that READ requests may request compressed responses. */ if (conn->dialect == SMB311_PROT_ID && conn->compress_algorithm != SMB3_COMPRESS_NONE) rsp->ShareFlags |= cpu_to_le32(SMB2_SHAREFLAG_COMPRESS_DATA); if (share && test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_UNREADABLE)) rsp->ShareFlags |= cpu_to_le32(SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM); if (share && test_share_config_flag(share, KSMBD_SHARE_FLAG_ENCRYPT_DATA)) rsp->ShareFlags |= cpu_to_le32(SMB2_SHAREFLAG_ENCRYPT_DATA); rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); if (rc) { if (status.ret == KSMBD_TREE_CONN_STATUS_OK) { ksmbd_tree_conn_disconnect(sess, status.tree_conn); status.tree_conn = NULL; } status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; } if (!IS_ERR(treename)) kfree(treename); if (!IS_ERR(name)) kfree(name); switch (status.ret) { case KSMBD_TREE_CONN_STATUS_OK: rsp->hdr.Status = STATUS_SUCCESS; rc = 0; break; case -ESTALE: case -ENOENT: case KSMBD_TREE_CONN_STATUS_NO_SHARE: rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; break; case -ENOMEM: case KSMBD_TREE_CONN_STATUS_NOMEM: rsp->hdr.Status = STATUS_NO_MEMORY; break; case KSMBD_TREE_CONN_STATUS_ERROR: case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: rsp->hdr.Status = STATUS_ACCESS_DENIED; break; case -EINVAL: rsp->hdr.Status = STATUS_INVALID_PARAMETER; break; default: rsp->hdr.Status = STATUS_ACCESS_DENIED; } if (status.ret != KSMBD_TREE_CONN_STATUS_OK) smb2_set_err_rsp(work); if (tree_conn) ksmbd_tree_connect_put(tree_conn); return rc; } /** * smb2_create_open_flags() - convert smb open flags to unix open flags * @file_present: is file already present * @access: file access flags * @disposition: file disposition flags * @may_flags: set with MAY_ flags * @coptions: file creation options * @mode: file mode * * Return: file open flags */ static int smb2_create_open_flags(bool file_present, __le32 access, __le32 disposition, int *may_flags, __le32 coptions, umode_t mode) { int oflags = O_NONBLOCK | O_LARGEFILE; if (coptions & FILE_DIRECTORY_FILE_LE || S_ISDIR(mode)) { access &= ~FILE_WRITE_DESIRE_ACCESS_LE; ksmbd_debug(SMB, "Discard write access to a directory\n"); } if (access & FILE_READ_DESIRED_ACCESS_LE && access & FILE_WRITE_DESIRE_ACCESS_LE) { oflags |= O_RDWR; *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { oflags |= O_WRONLY; *may_flags = MAY_OPEN | MAY_WRITE; } else { oflags |= O_RDONLY; *may_flags = MAY_OPEN | MAY_READ; } if (access == FILE_READ_ATTRIBUTES_LE || S_ISBLK(mode) || S_ISCHR(mode)) oflags |= O_PATH; if (file_present) { switch (disposition & FILE_CREATE_MASK_LE) { case FILE_OPEN_LE: case FILE_CREATE_LE: break; case FILE_SUPERSEDE_LE: case FILE_OVERWRITE_LE: case FILE_OVERWRITE_IF_LE: oflags |= O_TRUNC; break; default: break; } } else { switch (disposition & FILE_CREATE_MASK_LE) { case FILE_SUPERSEDE_LE: case FILE_CREATE_LE: case FILE_OPEN_IF_LE: case FILE_OVERWRITE_IF_LE: oflags |= O_CREAT; break; case FILE_OPEN_LE: case FILE_OVERWRITE_LE: oflags &= ~O_CREAT; break; default: break; } } return oflags; } /** * smb2_tree_disconnect() - handler for smb tree connect request * @work: smb work containing request buffer * * Return: 0 on success, otherwise error */ int smb2_tree_disconnect(struct ksmbd_work *work) { struct smb2_tree_disconnect_rsp *rsp; struct smb2_tree_disconnect_req *req; struct ksmbd_session *sess = work->sess; struct ksmbd_tree_connect *tcon = work->tcon; int err; ksmbd_debug(SMB, "Received smb2 tree disconnect request\n"); WORK_BUFFERS(work, req, rsp); if (!tcon) { ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; err = -ENOENT; goto err_out; } ksmbd_close_tree_conn_fds(work); err = ksmbd_tree_conn_disconnect(sess, tcon); if (err) { rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; goto err_out; } rsp->StructureSize = cpu_to_le16(4); err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_disconnect_rsp)); if (err) { rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; goto err_out; } return 0; err_out: smb2_set_err_rsp(work); return err; } /** * smb2_session_logoff() - handler for session log off request * @work: smb work containing request buffer * * Return: 0 on success, otherwise error */ int smb2_session_logoff(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct smb2_logoff_req *req; struct smb2_logoff_rsp *rsp; int err; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "Received smb2 session logoff request\n"); ksmbd_conn_lock(conn); if (!ksmbd_conn_good(conn)) { ksmbd_conn_unlock(conn); rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; smb2_set_err_rsp(work); return -ENOENT; } down_write(&sess->chann_lock); if (sess->tearing_down) { up_write(&sess->chann_lock); ksmbd_conn_unlock(conn); rsp->hdr.Status = STATUS_USER_SESSION_DELETED; smb2_set_err_rsp(work); return -ENOENT; } sess->tearing_down = true; up_write(&sess->chann_lock); ksmbd_all_conn_set_status(sess, KSMBD_SESS_NEED_RECONNECT); ksmbd_conn_unlock(conn); err = ksmbd_conn_wait_idle_sess(conn, sess); if (err) { down_write(&sess->chann_lock); sess->tearing_down = false; up_write(&sess->chann_lock); ksmbd_all_conn_set_status(sess, KSMBD_SESS_GOOD); rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; smb2_set_err_rsp(work); return err; } ksmbd_close_session_fds(work); if (ksmbd_tree_conn_session_logoff(sess)) { ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; smb2_set_err_rsp(work); err = -ENOENT; } else { err = 0; } down_write(&conn->session_lock); sess->kerberos_expiry = 0; sess->state = SMB2_SESSION_EXPIRED; up_write(&conn->session_lock); ksmbd_all_conn_set_status(sess, KSMBD_SESS_NEED_SETUP); if (err) return err; rsp->StructureSize = cpu_to_le16(4); err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); if (err) { rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; smb2_set_err_rsp(work); return err; } return 0; } /** * create_smb2_pipe() - create IPC pipe * @work: smb work containing request buffer * * Return: 0 on success, otherwise error */ static noinline int create_smb2_pipe(struct ksmbd_work *work) { struct smb2_create_rsp *rsp; struct smb2_create_req *req; int id = -1; int err; char *name; WORK_BUFFERS(work, req, rsp); name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 1, work->conn->local_nls); if (IS_ERR(name)) { rsp->hdr.Status = STATUS_NO_MEMORY; err = PTR_ERR(name); goto out; } id = ksmbd_session_rpc_open(work->sess, name); if (id < 0) { /* * mdssvc (Spotlight) is a routine, expected probe from macOS * that we deliberately don't support -- it's disabled at the * __rpc_method() level (mgmt/user_session.c), but this * generic failure log would otherwise still fire on every * single probe regardless. */ if (!(id == -ENOENT && (!strcmp(name, "\\mdssvc") || !strcmp(name, "mdssvc")))) pr_err("Unable to open RPC pipe: %d\n", id); err = id; goto out; } rsp->hdr.Status = STATUS_SUCCESS; rsp->StructureSize = cpu_to_le16(89); rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; rsp->Flags = 0; rsp->CreateAction = cpu_to_le32(FILE_OPENED); rsp->CreationTime = cpu_to_le64(0); rsp->LastAccessTime = cpu_to_le64(0); rsp->ChangeTime = cpu_to_le64(0); rsp->AllocationSize = cpu_to_le64(0); rsp->EndofFile = cpu_to_le64(0); rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; rsp->Reserved2 = 0; rsp->VolatileFileId = id; rsp->PersistentFileId = 0; rsp->CreateContextsOffset = 0; rsp->CreateContextsLength = 0; err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); if (err) goto out; kfree(name); return 0; out: switch (err) { case -EINVAL: rsp->hdr.Status = STATUS_INVALID_PARAMETER; break; case -ENOENT: rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; break; case -ENOSPC: case -ENOMEM: rsp->hdr.Status = STATUS_NO_MEMORY; break; } if (id >= 0) ksmbd_session_rpc_close(work->sess, id); if (!IS_ERR(name)) kfree(name); smb2_set_err_rsp(work); return err; } static bool smb2_is_private_ea(const char *name, size_t name_len) { if (name_len == SD_PREFIX_LEN && !strncasecmp(name, SD_PREFIX, SD_PREFIX_LEN)) return true; if (name_len == DOS_ATTRIBUTE_PREFIX_LEN && !strncasecmp(name, DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) return true; if (name_len >= STREAM_PREFIX_LEN && !strncasecmp(name, STREAM_PREFIX, STREAM_PREFIX_LEN)) return true; return false; } /** * smb2_set_ea() - handler for setting extended attributes using set * info command * @eabuf: set info command buffer * @buf_len: set info command buffer length * @path: dentry path for get ea * @get_write: get write access to a mount * * Return: 0 on success, otherwise error */ static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, const struct path *path, bool get_write) { struct mnt_idmap *idmap = mnt_idmap(path->mnt); char *attr_name = NULL, *value; int rc = 0; unsigned int next = 0; if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + le16_to_cpu(eabuf->EaValueLength)) return -EINVAL; attr_name = kmalloc(XATTR_NAME_MAX + 1, KSMBD_DEFAULT_GFP); if (!attr_name) return -ENOMEM; do { if (!eabuf->EaNameLength) goto next; ksmbd_debug(SMB, "name : <%s>, name_len : %u, value_len : %u, next : %u\n", eabuf->name, eabuf->EaNameLength, le16_to_cpu(eabuf->EaValueLength), le32_to_cpu(eabuf->NextEntryOffset)); if (eabuf->EaNameLength > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { rc = -EINVAL; break; } if (smb2_is_private_ea(eabuf->name, eabuf->EaNameLength)) { rc = -EACCES; break; } memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, eabuf->EaNameLength); attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; value = (char *)&eabuf->name + eabuf->EaNameLength + 1; if (!eabuf->EaValueLength) { rc = ksmbd_vfs_casexattr_len(idmap, path->dentry, attr_name, XATTR_USER_PREFIX_LEN + eabuf->EaNameLength); /* delete the EA only when it exits */ if (rc > 0) { rc = ksmbd_vfs_remove_xattr(idmap, path, attr_name, get_write); if (rc < 0) { ksmbd_debug(SMB, "remove xattr failed(%d)\n", rc); break; } } /* if the EA doesn't exist, just do nothing. */ rc = 0; } else { rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, le16_to_cpu(eabuf->EaValueLength), 0, get_write); if (rc < 0) { ksmbd_debug(SMB, "ksmbd_vfs_setxattr is failed(%d)\n", rc); break; } } next: next = le32_to_cpu(eabuf->NextEntryOffset); if (next == 0 || buf_len < next) break; buf_len -= next; eabuf = (struct smb2_ea_info *)((char *)eabuf + next); if (buf_len < sizeof(struct smb2_ea_info)) { rc = -EINVAL; break; } if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + 1 + le16_to_cpu(eabuf->EaValueLength)) { rc = -EINVAL; break; } } while (next != 0); kfree(attr_name); return rc; } static noinline int smb2_set_stream_name_xattr(const struct path *path, struct ksmbd_file *fp, char *stream_name, int s_type) { struct mnt_idmap *idmap = mnt_idmap(path->mnt); size_t xattr_stream_size; char *xattr_stream_name; int rc; rc = ksmbd_vfs_xattr_stream_name(stream_name, &xattr_stream_name, &xattr_stream_size, s_type); if (rc) return rc; fp->stream.name = xattr_stream_name; fp->stream.size = xattr_stream_size; /* Check if there is stream prefix in xattr space */ rc = ksmbd_vfs_casexattr_len(idmap, path->dentry, xattr_stream_name, xattr_stream_size); if (rc >= 0) return 0; if (fp->cdoption == FILE_OPEN_LE) { if (!strcmp(stream_name, "AFP_AfpInfo") && test_share_config_flag(fp->tcon->share_conf, KSMBD_SHARE_FLAG_TIME_MACHINE)) { /* * Synthesize an empty AFP_AfpInfo xattr on first access. * type=0/creator=0 tells macOS to use the file extension * for icon and type detection. * * Scoped to TIME_MACHINE shares, matching the rest of * the AAPL series -- conn->is_aapl alone isn't a safe * gate here, since the pre-existing narrow UniqueId=0 * path can also set it on ordinary, non-Time-Machine * shares whenever a Mac client happens to negotiate * AAPL there too. */ static const u8 afpinfo_empty[60] = { 0x00, 0x05, 0x16, 0x07, /* magic 0x00051607 BE */ 0x00, 0x02, 0x00, 0x00, /* version 0x00020000 BE */ }; rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, (void *)afpinfo_empty, sizeof(afpinfo_empty), 0, false); return rc < 0 ? rc : 0; } ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); return -EBADF; } rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); if (rc < 0) pr_err("Failed to store XATTR stream name :%d\n", rc); return 0; } /* * fp->stream.size is the byte length of the mangled xattr *name* * (used as attr_name_len when looking the xattr up), not the size of * the xattr's value. Reporting it as EndOfFile/AllocationSize for a * stream handle is wrong -- query the xattr's actual value length * instead. */ static loff_t ksmbd_stream_eof(struct ksmbd_file *fp) { ssize_t slen = ksmbd_vfs_casexattr_len(file_mnt_idmap(fp->filp), fp->filp->f_path.dentry, fp->stream.name, fp->stream.size); return slen < 0 ? 0 : (loff_t)slen; } static int smb2_remove_smb_xattrs(const struct path *path) { struct mnt_idmap *idmap = mnt_idmap(path->mnt); char *name, *xattr_list = NULL; ssize_t xattr_list_len; int err = 0; xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (xattr_list_len < 0) { goto out; } else if (!xattr_list_len) { ksmbd_debug(SMB, "empty xattr in the file\n"); goto out; } for (name = xattr_list; name - xattr_list < xattr_list_len; name += strlen(name) + 1) { ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN)) { err = ksmbd_vfs_remove_xattr(idmap, path, name, true); if (err) ksmbd_debug(SMB, "remove xattr failed : %s\n", name); } } out: kvfree(xattr_list); return err; } static int smb2_create_truncate(const struct path *path) { int rc = vfs_truncate(path, 0); if (rc) { pr_err("vfs_truncate failed, rc %d\n", rc); return rc; } rc = smb2_remove_smb_xattrs(path); if (rc == -EOPNOTSUPP) rc = 0; if (rc) ksmbd_debug(SMB, "ksmbd_truncate_stream_name_xattr failed, rc %d\n", rc); return rc; } static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, struct ksmbd_file *fp) { struct xattr_dos_attrib da = {0}; int rc; if (!test_share_config_flag(tcon->share_conf, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) return; da.version = 4; da.attr = le32_to_cpu(fp->f_ci->m_fattr); da.itime = da.create_time = fp->create_time; da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | XATTR_DOSINFO_ITIME; rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); if (rc) ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); } static bool smb2_parent_compressed(struct ksmbd_tree_connect *tcon, const struct path *path) { struct dentry *parent = dget_parent(path->dentry); struct file_kattr fa = { .flags_valid = true }; struct xattr_dos_attrib da; bool compressed = false; int rc; rc = vfs_fileattr_get(parent, &fa); if (!rc && fa.flags & FS_COMPR_FL) { compressed = true; goto out; } rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), parent, &da); if (rc > 0 && da.attr & FILE_ATTRIBUTE_COMPRESSED) compressed = true; out: dput(parent); return compressed; } static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, struct ksmbd_file *fp) { struct xattr_dos_attrib da = {}; bool store_dos_attrs = test_share_config_flag(tcon->share_conf, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS); int rc; fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), path->dentry, &da); if (rc > 0) { if (store_dos_attrs) { fp->f_ci->m_fattr = cpu_to_le32(da.attr); fp->create_time = da.create_time; fp->itime = da.itime; } else { fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_COMPRESSED_LE | FILE_ATTRIBUTE_SPARSE_FILE_LE); fp->f_ci->m_fattr |= cpu_to_le32(da.attr & (FILE_ATTRIBUTE_COMPRESSED | FILE_ATTRIBUTE_SPARSE_FILE)); } } } static int smb2_creat(struct ksmbd_work *work, struct path *path, char *name, int open_flags, umode_t posix_mode, bool is_dir) { struct ksmbd_tree_connect *tcon = work->tcon; struct ksmbd_share_config *share = tcon->share_conf; umode_t mode; int rc; if (!(open_flags & O_CREAT)) return -EBADF; ksmbd_debug(SMB, "file does not exist, so creating\n"); if (is_dir == true) { ksmbd_debug(SMB, "creating directory\n"); mode = share_config_directory_mode(share, posix_mode); rc = ksmbd_vfs_mkdir(work, name, mode); if (rc) return rc; } else { ksmbd_debug(SMB, "creating regular file\n"); mode = share_config_create_mode(share, posix_mode); rc = ksmbd_vfs_create(work, name, mode); if (rc) return rc; } rc = ksmbd_vfs_kern_path(work, name, 0, path, 0); if (rc) { pr_err("cannot get linux path (%s), err = %d\n", name, rc); return rc; } return 0; } static int smb2_create_sd_buffer(struct ksmbd_work *work, struct smb2_create_req *req, const struct path *path) { struct create_context *context; struct create_sd_buf_req *sd_buf; if (!req->CreateContextsOffset) return -ENOENT; /* Parse SD BUFFER create contexts */ context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); if (!context) return -ENOENT; else if (IS_ERR(context)) return PTR_ERR(context); ksmbd_debug(SMB, "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); sd_buf = (struct create_sd_buf_req *)context; if (le16_to_cpu(context->DataOffset) + le32_to_cpu(context->DataLength) < sizeof(struct create_sd_buf_req)) return -EINVAL; return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, le32_to_cpu(sd_buf->ccontext.DataLength), true, false); } static void ksmbd_acls_fattr(struct smb_fattr *fattr, struct mnt_idmap *idmap, struct inode *inode) { vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); fattr->cf_uid = vfsuid_into_kuid(vfsuid); fattr->cf_gid = vfsgid_into_kgid(vfsgid); fattr->cf_mode = inode->i_mode; fattr->cf_acls = NULL; fattr->cf_dacls = NULL; if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); if (S_ISDIR(inode->i_mode)) fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); } } enum { DURABLE_RECONN_V2 = 1, DURABLE_RECONN, DURABLE_REQ_V2, DURABLE_REQ, }; struct durable_info { struct ksmbd_file *fp; unsigned short int type; bool persistent; bool reconnected; bool replay; bool replay_consumed; bool app_instance_id; bool app_instance_version_valid; unsigned int timeout; char *CreateGuid; char AppInstanceId[SMB2_CREATE_GUID_SIZE]; u64 app_instance_version_high; u64 app_instance_version_low; }; static int smb2_check_durable_replay(struct ksmbd_work *work, struct ksmbd_file *fp, struct lease_ctx_info *lc, bool persistent) { struct oplock_info *opinfo; int ret = 0; if (!fp->is_durable && !fp->is_persistent) return -EACCES; if (ksmbd_vfs_compare_durable_owner(fp, work->sess->user) == false) return -EACCES; if (fp->is_persistent && !persistent) return -EINVAL; opinfo = opinfo_get(fp); if (!opinfo) return 0; if (opinfo->sess && opinfo->sess->id != work->sess->id) { ret = -ENOEXEC; goto out; } if (opinfo->is_lease) { if (!lc || memcmp(opinfo->o_lease->lease_key, lc->lease_key, SMB2_LEASE_KEY_SIZE)) { ret = -EACCES; goto out; } } else { if (lc) { ret = -EACCES; goto out; } if (fp->is_durable && opinfo->level != SMB2_OPLOCK_LEVEL_BATCH) ret = -EACCES; } out: opinfo_put(opinfo); return ret; } static bool smb2_durable_replay_consumed(struct ksmbd_file *fp) { bool consumed; spin_lock(&fp->f_lock); consumed = fp->durable_replay_consumed; spin_unlock(&fp->f_lock); return consumed; } static void smb2_mark_durable_replay_consumed(struct ksmbd_file *fp) { spin_lock(&fp->f_lock); fp->durable_replay_consumed = true; spin_unlock(&fp->f_lock); } static bool smb2_durable_replay_differs(struct ksmbd_file *fp, struct smb2_create_req *req) { return fp->cdoption != req->CreateDisposition || fp->create_file_attributes != req->FileAttributes; } static int parse_durable_handle_context(struct ksmbd_work *work, struct smb2_create_req *req, struct lease_ctx_info *lc, struct durable_info *dh_info) { struct ksmbd_conn *conn = work->conn; struct create_context *context; int dh_idx, err = 0; u64 persistent_id = 0; int req_op_level; static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"}; req_op_level = req->RequestedOplockLevel; for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr); dh_idx++) { context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4); if (IS_ERR(context)) { err = PTR_ERR(context); goto out; } if (!context) continue; switch (dh_idx) { case DURABLE_RECONN_V2: { struct create_durable_handle_reconnect_v2 *recon_v2; u32 flags; if (dh_info->type == DURABLE_RECONN || dh_info->type == DURABLE_REQ_V2) { err = -EINVAL; goto out; } if (le32_to_cpu(context->DataLength) < sizeof(recon_v2->dcontext)) { err = -EINVAL; goto out; } recon_v2 = (struct create_durable_handle_reconnect_v2 *)context; flags = le32_to_cpu(recon_v2->dcontext.Flags); if (flags & ~SMB2_DHANDLE_FLAG_PERSISTENT) { err = -EINVAL; goto out; } dh_info->persistent = flags & SMB2_DHANDLE_FLAG_PERSISTENT; persistent_id = recon_v2->dcontext.Fid.PersistentFileId; dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); if (!dh_info->fp) { ksmbd_debug(SMB, "Failed to get durable handle state\n"); err = -EBADF; goto out; } /* A zero VolatileFileId means that the client did not specify it. */ if (recon_v2->dcontext.Fid.VolatileFileId && dh_info->fp->durable_volatile_id != recon_v2->dcontext.Fid.VolatileFileId) { err = -EBADF; ksmbd_put_durable_fd(dh_info->fp); goto out; } if (memcmp(dh_info->fp->create_guid, recon_v2->dcontext.CreateGuid, SMB2_CREATE_GUID_SIZE)) { err = -EBADF; ksmbd_put_durable_fd(dh_info->fp); goto out; } /* A persistent reconnect must match the original open type. */ if (dh_info->fp->is_persistent != dh_info->persistent) { err = dh_info->persistent ? -EINVAL : -EBADF; ksmbd_put_durable_fd(dh_info->fp); goto out; } dh_info->type = dh_idx; dh_info->reconnected = true; ksmbd_debug(SMB, "reconnect v2 Persistent-id from reconnect = %llu\n", persistent_id); break; } case DURABLE_RECONN: { create_durable_reconn_t *recon; if (dh_info->type == DURABLE_RECONN_V2 || dh_info->type == DURABLE_REQ_V2) { err = -EINVAL; goto out; } if (le32_to_cpu(context->DataLength) < sizeof(recon->Data)) { err = -EINVAL; goto out; } recon = (create_durable_reconn_t *)context; persistent_id = recon->Data.Fid.PersistentFileId; dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); if (!dh_info->fp) { ksmbd_debug(SMB, "Failed to get durable handle state\n"); err = -EBADF; goto out; } /* A zero VolatileFileId means that the client did not specify it. */ if (recon->Data.Fid.VolatileFileId && dh_info->fp->durable_volatile_id != recon->Data.Fid.VolatileFileId) { err = -EBADF; ksmbd_put_durable_fd(dh_info->fp); goto out; } dh_info->type = dh_idx; dh_info->reconnected = true; ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n", persistent_id); break; } case DURABLE_REQ_V2: { struct create_durable_req_v2 *durable_v2_blob; if (dh_info->type == DURABLE_RECONN || dh_info->type == DURABLE_RECONN_V2) { err = -EINVAL; goto out; } if (le32_to_cpu(context->DataLength) < sizeof(durable_v2_blob->dcontext)) { err = -EINVAL; goto out; } durable_v2_blob = (struct create_durable_req_v2 *)context; if (le32_to_cpu(durable_v2_blob->dcontext.Flags) & ~SMB2_DHANDLE_FLAG_PERSISTENT) { err = -EINVAL; goto out; } ksmbd_debug(SMB, "Request for durable v2 open\n"); dh_info->CreateGuid = durable_v2_blob->dcontext.CreateGuid; dh_info->persistent = le32_to_cpu(durable_v2_blob->dcontext.Flags) & SMB2_DHANDLE_FLAG_PERSISTENT; dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->dcontext.CreateGuid); if (dh_info->fp) { if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid, SMB2_CLIENT_GUID_SIZE)) { if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) { err = -ENOEXEC; ksmbd_put_durable_fd(dh_info->fp); goto out; } if (dh_info->fp->f_state == FP_NEW) { /* Original CREATE is still pending. */ ksmbd_put_durable_fd(dh_info->fp); err = -EAGAIN; goto out; } if (!dh_info->fp->is_durable && !dh_info->fp->is_persistent) { /* * A DurableHandleReqV2 CREATE can complete * without granting durability (for example, if * it requested no oplock). Its CreateGuid still * identifies a completed CREATE for replay. */ if (dh_info->fp->conn && ksmbd_vfs_compare_durable_owner( dh_info->fp, work->sess->user)) { if (smb2_durable_replay_consumed( dh_info->fp)) { ksmbd_put_durable_fd(dh_info->fp); dh_info->fp = NULL; dh_info->type = dh_idx; dh_info->replay_consumed = true; break; } if (smb2_durable_replay_differs( dh_info->fp, req)) smb2_mark_durable_replay_consumed( dh_info->fp); dh_info->replay = true; dh_info->type = dh_idx; goto out; } ksmbd_put_durable_fd(dh_info->fp); err = -EACCES; goto out; } if (dh_info->fp->conn && smb2_durable_replay_consumed(dh_info->fp)) { ksmbd_put_durable_fd(dh_info->fp); dh_info->fp = NULL; dh_info->type = dh_idx; dh_info->replay_consumed = true; break; } err = smb2_check_durable_replay(work, dh_info->fp, lc, dh_info->persistent); if (err) { ksmbd_put_durable_fd(dh_info->fp); goto out; } if (dh_info->fp->conn) { if (smb2_durable_replay_differs(dh_info->fp, req)) smb2_mark_durable_replay_consumed( dh_info->fp); dh_info->replay = true; } else { dh_info->reconnected = true; } dh_info->type = dh_idx; goto out; } ksmbd_put_durable_fd(dh_info->fp); dh_info->fp = NULL; } if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { dh_info->timeout = le32_to_cpu(durable_v2_blob->dcontext.Timeout); dh_info->type = dh_idx; } break; } case DURABLE_REQ: if (dh_info->type == DURABLE_RECONN) goto out; if (dh_info->type == DURABLE_RECONN_V2 || dh_info->type == DURABLE_REQ_V2) { err = -EINVAL; goto out; } if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { ksmbd_debug(SMB, "Request for durable open\n"); dh_info->type = dh_idx; } } } out: return err; } static int parse_app_instance_id(struct smb2_create_req *req, struct durable_info *dh_info) { struct create_context *context; char *data; context = smb2_find_context_vals(req, SMB2_CREATE_APP_INSTANCE_ID, SMB2_CREATE_GUID_SIZE); if (IS_ERR(context)) return PTR_ERR(context); if (!context) return 0; if (le32_to_cpu(context->DataLength) < 20) return -EINVAL; data = (char *)context + le16_to_cpu(context->DataOffset); if (data[0] != 20 || data[1]) return -EINVAL; memcpy(dh_info->AppInstanceId, data + 4, SMB2_CREATE_GUID_SIZE); dh_info->app_instance_id = true; return 0; } static int parse_app_instance_version(struct smb2_create_req *req, struct durable_info *dh_info) { struct create_context *context; char *data; context = smb2_find_context_vals(req, SMB2_CREATE_APP_INSTANCE_VERSION, SMB2_CREATE_GUID_SIZE); if (IS_ERR(context)) return PTR_ERR(context); if (!context) return 0; if (le32_to_cpu(context->DataLength) < 24) return -EINVAL; data = (char *)context + le16_to_cpu(context->DataOffset); if (get_unaligned_le16(data) != 24 || get_unaligned_le16(data + 2) != 0) return -EINVAL; dh_info->app_instance_version_high = get_unaligned_le64(data + 8); dh_info->app_instance_version_low = get_unaligned_le64(data + 16); dh_info->app_instance_version_valid = true; return 0; } static int smb2_handle_app_instance_id(struct smb2_create_rsp *rsp, struct durable_info *dh_info) { struct ksmbd_file *old_fp; bool reject = false; if (!dh_info->app_instance_id) return 0; old_fp = ksmbd_lookup_fd_app_instance_id(dh_info->AppInstanceId); if (!old_fp) return 0; if (dh_info->app_instance_version_valid) { if (old_fp->app_instance_version_valid && (dh_info->app_instance_version_high < old_fp->app_instance_version_high || (dh_info->app_instance_version_high == old_fp->app_instance_version_high && dh_info->app_instance_version_low <= old_fp->app_instance_version_low))) reject = true; } else if (old_fp->app_instance_version_valid) { reject = true; } ksmbd_put_durable_fd(old_fp); if (reject) { rsp->hdr.Status = STATUS_FILE_FORCED_CLOSED; return -EIO; } return ksmbd_close_fd_app_instance_id(dh_info->AppInstanceId); } /** * smb2_open() - handler for smb file open request * @work: smb work containing request buffer * * Return: 0 on success, otherwise error */ int smb2_open(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct ksmbd_tree_connect *tcon = work->tcon; struct smb2_create_req *req; struct smb2_create_rsp *rsp; struct path path; struct ksmbd_share_config *share = tcon->share_conf; struct ksmbd_file *fp = NULL; struct file *filp = NULL; struct mnt_idmap *idmap = NULL; struct kstat stat; struct create_context *context; struct lease_ctx_info *lc = NULL; struct create_ea_buf_req *ea_buf = NULL; struct oplock_info *opinfo; struct durable_info dh_info = {0}; __le32 *next_ptr = NULL; int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; int rc = 0; int contxt_cnt = 0, query_disk_id = 0; bool maximal_access_ctxt = false, posix_ctxt = false; bool aapl_ctxt = false; bool durable_rsp = true; __u64 aapl_req_bitmap = 0, aapl_client_caps = 0; int s_type = 0; int next_off = 0; char *name = NULL; char *stream_name = NULL; bool file_present = false, created = false, already_permitted = false; int share_ret, need_truncate = 0; u64 time, alloc_size = 0; umode_t posix_mode = 0; __le32 daccess, maximal_access = 0; u32 dos_attr; int iov_len = 0; ksmbd_debug(SMB, "Received smb2 create request\n"); WORK_BUFFERS(work, req, rsp); if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { ksmbd_debug(SMB, "invalid flag in chained command\n"); rsp->hdr.Status = STATUS_INVALID_PARAMETER; smb2_set_err_rsp(work); return -EINVAL; } if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe create request\n"); return create_smb2_pipe(work); } if (req->CreateContextsOffset && tcon->posix_extensions) { context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { struct create_posix *posix = (struct create_posix *)context; if (le16_to_cpu(context->DataOffset) + le32_to_cpu(context->DataLength) < sizeof(struct create_posix) - 4) { rc = -EINVAL; goto err_out2; } ksmbd_debug(SMB, "get posix context\n"); posix_mode = le32_to_cpu(posix->Mode); posix_ctxt = true; } } if (req->NameLength) { name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), le16_to_cpu(req->NameLength), work->conn->local_nls); if (IS_ERR(name)) { rc = PTR_ERR(name); name = NULL; goto err_out2; } ksmbd_debug(SMB, "converted name = %s\n", name); if (posix_ctxt == false) { if (strchr(name, ':')) { if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_STREAMS)) { rc = -EBADF; goto err_out2; } rc = parse_stream_name(name, &stream_name, &s_type); if (rc < 0) goto err_out2; } rc = ksmbd_validate_filename(name); if (rc < 0) goto err_out2; } if (ksmbd_share_veto_filename(share, name)) { rc = -ENOENT; ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", name); goto err_out2; } } else { name = kstrdup("", KSMBD_DEFAULT_GFP); if (!name) { rc = -ENOMEM; goto err_out2; } } req_op_level = req->RequestedOplockLevel; if (req->CreateContextsOffset) { rc = parse_app_instance_id(req, &dh_info); if (rc) goto err_out2; rc = parse_app_instance_version(req, &dh_info); if (rc) goto err_out2; } if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && req->CreateContextsOffset) { lc = parse_lease_state(req); if (IS_ERR(lc)) { rc = PTR_ERR(lc); lc = NULL; goto err_out2; } if (lc && lc->version == 2 && conn->dialect < SMB30_PROT_ID) { kfree(lc); lc = NULL; if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) req_op_level = SMB2_OPLOCK_LEVEL_NONE; } rc = parse_durable_handle_context(work, req, lc, &dh_info); if (rc) { ksmbd_debug(SMB, "error parsing durable handle context\n"); goto err_out2; } if (dh_info.replay == true) { fp = dh_info.fp; if (ksmbd_override_fsids(work)) { rc = -ENOMEM; goto err_out2; } file_info = FILE_OPENED; rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); if (rc) goto err_out2; goto reconnected_fp; } if (dh_info.reconnected == true) { rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, sess->user, name); if (rc) goto err_out2; rc = ksmbd_reopen_durable_fd(work, dh_info.fp); if (rc) goto err_out2; fp = dh_info.fp; if (ksmbd_override_fsids(work)) { rc = -ENOMEM; goto err_out2; } file_info = FILE_OPENED; rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); if (rc) goto err_out2; goto reconnected_fp; } } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) { lc = parse_lease_state(req); if (IS_ERR(lc)) { rc = PTR_ERR(lc); lc = NULL; goto err_out2; } if (lc && lc->version == 2 && conn->dialect < SMB30_PROT_ID) { kfree(lc); lc = NULL; req_op_level = SMB2_OPLOCK_LEVEL_NONE; } } if (dh_info.app_instance_id && !dh_info.reconnected && !dh_info.replay) { rc = smb2_handle_app_instance_id(rsp, &dh_info); if (rc) goto err_out2; } if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { pr_err("Invalid impersonationlevel : 0x%x\n", le32_to_cpu(req->ImpersonationLevel)); rc = -EIO; rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; goto err_out2; } if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { pr_err("Invalid create options : 0x%x\n", le32_to_cpu(req->CreateOptions)); rc = -EINVAL; goto err_out2; } else { if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && req->CreateOptions & FILE_RANDOM_ACCESS_LE) req->CreateOptions &= ~FILE_SEQUENTIAL_ONLY_LE; if (req->CreateOptions & (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | FILE_RESERVE_OPFILTER_LE)) { rc = -EOPNOTSUPP; goto err_out2; } if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { rc = -EINVAL; goto err_out2; } } } if (le32_to_cpu(req->CreateDisposition) > le32_to_cpu(FILE_OVERWRITE_IF_LE)) { pr_err("Invalid create disposition : 0x%x\n", le32_to_cpu(req->CreateDisposition)); rc = -EINVAL; goto err_out2; } if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { pr_err("Invalid desired access : 0x%x\n", le32_to_cpu(req->DesiredAccess)); rc = -EACCES; goto err_out2; } if (req->DesiredAccess == FILE_SYNCHRONIZE_LE && req->CreateDisposition == FILE_OPEN_IF_LE && !req->FileAttributes) { rc = -EACCES; goto err_out2; } if (req->FileAttributes && (req->FileAttributes & ~cpu_to_le32(SMB2_CREATE_FILE_ATTRIBUTE_MASK))) { pr_err("Invalid file attribute : 0x%x\n", le32_to_cpu(req->FileAttributes)); rc = -EINVAL; goto err_out2; } if (req->CreateContextsOffset) { /* Parse non-durable handle create contexts */ context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { ea_buf = (struct create_ea_buf_req *)context; if (le16_to_cpu(context->DataOffset) + le32_to_cpu(context->DataLength) < sizeof(struct create_ea_buf_req)) { rc = -EINVAL; goto err_out2; } if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { rsp->hdr.Status = STATUS_ACCESS_DENIED; rc = -EACCES; goto err_out2; } } context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { ksmbd_debug(SMB, "get query maximal access context\n"); maximal_access_ctxt = 1; } context = smb2_find_context_vals(req, SMB2_CREATE_TIMEWARP_REQUEST, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { ksmbd_debug(SMB, "get timewarp context\n"); rc = -EBADF; goto err_out2; } } if (ksmbd_override_fsids(work)) { rc = -ENOMEM; goto err_out2; } rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1); /* * A durable handle opened with delete-on-close is preserved across a * disconnect so it can be reclaimed by a durable reconnect. When a new * delete-on-close open for the same name arrives instead, the * disconnected handle must give way: close it so its delete-on-close * removes the file, then re-resolve so this open can create a fresh one. */ if (!rc && (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) && (req->CreateDisposition == FILE_OVERWRITE_IF_LE || req->CreateDisposition == FILE_OPEN_IF_LE) && ksmbd_close_disconnected_durable_delete_on_close(path.dentry)) { path_put(&path); rc = ksmbd_vfs_kern_path(work, name, LOOKUP_NO_SYMLINKS, &path, 1); } if (!rc) { file_present = true; if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { struct xattr_dos_attrib da; /* * If file exists with under flags, return access * denied error. */ if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || req->CreateDisposition == FILE_OPEN_IF_LE) { rc = -EACCES; goto err_out; } if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); rc = -EACCES; goto err_out; } if (test_share_config_flag(tcon->share_conf, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path.mnt), path.dentry, &da) > 0 && da.attr & FILE_ATTRIBUTE_READONLY) { rsp->hdr.Status = STATUS_CANNOT_DELETE; rc = -EACCES; goto err_out; } } else if (d_is_symlink(path.dentry)) { rc = -EACCES; goto err_out; } idmap = mnt_idmap(path.mnt); } else { if (rc != -ENOENT) goto err_out; ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", name, rc); rc = 0; } if (!file_present && req->CreateOptions & FILE_DELETE_ON_CLOSE_LE && req->FileAttributes & FILE_ATTRIBUTE_READONLY_LE) { rsp->hdr.Status = STATUS_CANNOT_DELETE; rc = -EACCES; goto err_out; } /* * An explicit ::$DATA suffix names the unnamed data stream and is * canonicalized to a NULL stream name (base file), but the request * still has to be validated against the data-stream type, e.g. opening * ::$DATA with FILE_DIRECTORY_FILE must fail with * STATUS_NOT_A_DIRECTORY. */ if (stream_name || s_type == DATA_STREAM) { if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { if (s_type == DATA_STREAM) { rc = -EIO; rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; } } else { if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && !stream_name && s_type == DATA_STREAM) { rc = -EIO; rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; } } if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; rc = -EIO; } if (rc < 0) goto err_out; } if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && S_ISDIR(d_inode(path.dentry)->i_mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", name, req->CreateOptions); rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; rc = -EIO; goto err_out; } if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && !(req->CreateDisposition == FILE_CREATE_LE) && !S_ISDIR(d_inode(path.dentry)->i_mode)) { rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; rc = -EIO; goto err_out; } if (!stream_name && file_present && req->CreateDisposition == FILE_CREATE_LE) { rc = -EEXIST; goto err_out; } daccess = smb_map_generic_desired_access(req->DesiredAccess); if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { rc = smb_check_perm_dacl(conn, &path, &daccess, req->DesiredAccess, sess->user->uid, false); if (rc) goto err_out; if (maximal_access_ctxt) { maximal_access = FILE_MAXIMAL_ACCESS_LE; rc = smb_check_perm_dacl(conn, &path, &maximal_access, 0, sess->user->uid, false); if (rc) goto err_out; /* * smb_check_perm_dacl() returns success without * touching *pdaccess when the object has no stored * NT ACL, leaving maximal_access as the * FILE_MAXIMAL_ACCESS_LE request sentinel instead of * a real access mask. */ if (maximal_access == FILE_MAXIMAL_ACCESS_LE) ksmbd_vfs_query_maximal_access(idmap, path.dentry, &maximal_access); } } if (daccess & FILE_MAXIMAL_ACCESS_LE) { if (!file_present) { daccess = cpu_to_le32(GENERIC_ALL_FLAGS); } else { ksmbd_vfs_query_maximal_access(idmap, path.dentry, &daccess); already_permitted = true; } maximal_access = daccess; } open_flags = smb2_create_open_flags(file_present, daccess, req->CreateDisposition, &may_flags, req->CreateOptions, file_present ? d_inode(path.dentry)->i_mode : 0); if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { if (open_flags & (O_CREAT | O_TRUNC)) { ksmbd_debug(SMB, "User does not have write permission\n"); rc = -EACCES; goto err_out; } } /*create file if not present */ if (!file_present) { rc = smb2_creat(work, &path, name, open_flags, posix_mode, req->CreateOptions & FILE_DIRECTORY_FILE_LE); if (rc) { if (rc == -ENOENT) { rc = -EIO; rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; } goto err_out; } created = true; idmap = mnt_idmap(path.mnt); if (ea_buf) { if (le32_to_cpu(ea_buf->ccontext.DataLength) < sizeof(struct smb2_ea_info)) { rc = -EINVAL; goto err_out; } rc = smb2_set_ea(&ea_buf->ea, le32_to_cpu(ea_buf->ccontext.DataLength), &path, false); if (rc == -EOPNOTSUPP) rc = 0; else if (rc) goto err_out; } } else if (!already_permitted) { /* FILE_READ_ATTRIBUTE is allowed without inode_permission, * because execute(search) permission on a parent directory, * is already granted. */ if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { rc = inode_permission(idmap, d_inode(path.dentry), may_flags); if (rc) goto err_out; if ((daccess & FILE_DELETE_LE) || (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { rc = inode_permission(idmap, d_inode(path.dentry->d_parent), MAY_EXEC | MAY_WRITE); if (rc) goto err_out; } } } rc = ksmbd_query_inode_status(path.dentry->d_parent); if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { rc = -EBUSY; goto err_out; } rc = 0; filp = dentry_open(&path, open_flags, current_cred()); if (IS_ERR(filp)) { rc = PTR_ERR(filp); pr_err("dentry open for dir failed, rc %d\n", rc); goto err_out; } if (file_present) { if (!(open_flags & O_TRUNC)) file_info = FILE_OPENED; else file_info = FILE_OVERWRITTEN; if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == FILE_SUPERSEDE_LE) file_info = FILE_SUPERSEDED; } else if (open_flags & O_CREAT) { file_info = FILE_CREATED; } ksmbd_vfs_set_fadvise(filp, req->CreateOptions); /* Obtain Volatile-ID */ fp = ksmbd_open_fd(work, filp); if (IS_ERR(fp)) { fput(filp); rc = PTR_ERR(fp); fp = NULL; goto err_out; } /* Get Persistent-ID */ ksmbd_open_durable_fd(fp); if (!has_file_id(fp->persistent_id)) { rc = -ENOMEM; goto err_out; } /* * Publish the client and create GUID before an oplock/lease break can * make this CREATE pending. A replay of that in-flight CREATE must find * this FP_NEW handle and fail with STATUS_FILE_NOT_AVAILABLE instead of * waiting on the same break again. */ memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); if (dh_info.app_instance_id) { memcpy(fp->app_instance_id, dh_info.AppInstanceId, SMB2_CREATE_GUID_SIZE); fp->has_app_instance_id = true; } if (dh_info.app_instance_version_valid) { fp->app_instance_version_high = dh_info.app_instance_version_high; fp->app_instance_version_low = dh_info.app_instance_version_low; fp->app_instance_version_valid = true; } if (dh_info.CreateGuid) { memcpy(fp->create_guid, dh_info.CreateGuid, SMB2_CREATE_GUID_SIZE); fp->durable_replay_consumed = dh_info.replay_consumed; rc = ksmbd_vfs_set_durable_owner(fp, sess->user); if (rc) goto err_out; } fp->cdoption = req->CreateDisposition; fp->create_file_attributes = req->FileAttributes; fp->daccess = daccess; fp->saccess = req->ShareAccess; fp->coption = req->CreateOptions; /* Set default windows and posix acls if creating new file */ if (created) { int posix_acl_rc; struct inode *inode = d_inode(path.dentry); posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, &path, d_inode(path.dentry->d_parent)); if (posix_acl_rc) ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); rc = smb2_create_sd_buffer(work, req, &path); if (rc && rc != -ENOENT) goto err_out; if (rc == -ENOENT) { if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_ACL_XATTR)) { rc = smb_inherit_dacl(conn, &path, sess->user->uid, sess->user->gid); } if (rc) { if (posix_acl_rc) ksmbd_vfs_set_init_posix_acl(idmap, &path); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_ACL_XATTR)) { struct smb_fattr fattr; struct smb_ntsd *pntsd; int pntsd_size; size_t scratch_len; ksmbd_acls_fattr(&fattr, idmap, inode); scratch_len = smb_acl_sec_desc_scratch_len(&fattr, NULL, 0, OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO); if (!scratch_len || scratch_len == SIZE_MAX) { rc = -EFBIG; posix_acl_release(fattr.cf_acls); posix_acl_release(fattr.cf_dacls); goto err_out; } pntsd = kvzalloc(scratch_len, KSMBD_DEFAULT_GFP); if (!pntsd) { rc = -ENOMEM; posix_acl_release(fattr.cf_acls); posix_acl_release(fattr.cf_dacls); goto err_out; } rc = build_sec_desc(idmap, pntsd, NULL, 0, OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO, &pntsd_size, &fattr); posix_acl_release(fattr.cf_acls); posix_acl_release(fattr.cf_dacls); if (rc) { kvfree(pntsd); goto err_out; } rc = ksmbd_vfs_set_sd_xattr(conn, idmap, &path, pntsd, pntsd_size, false); kvfree(pntsd); if (rc) pr_err("failed to store ntacl in xattr : %d\n", rc); } } } rc = 0; } if (stream_name) { rc = smb2_set_stream_name_xattr(&path, fp, stream_name, s_type); if (rc) goto err_out; file_info = FILE_CREATED; } fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); fp->is_posix_ctxt = posix_ctxt; /* fp should be searchable through ksmbd_inode.m_fp_list * after daccess, saccess, attrib_only, and stream are * initialized. */ down_write(&fp->f_ci->m_lock); list_add(&fp->node, &fp->f_ci->m_fp_list); up_write(&fp->f_ci->m_lock); /* Check delete pending among previous fp before oplock break */ if (ksmbd_inode_pending_delete(fp)) { rc = -EBUSY; goto err_out; } if (!stream_name && daccess & FILE_DELETE_LE && ksmbd_has_stream_without_delete_share(fp)) { rc = -EPERM; goto err_out; } if (file_present || created) path_put(&path); if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && !fp->attrib_only && !stream_name) { smb_break_all_oplock(work, fp); need_truncate = 1; } share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && !(conn->vals->req_capabilities & SMB2_GLOBAL_CAP_LEASING))) { if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { rc = share_ret; goto err_out1; } } else { if (created && !lc) smb_send_parent_lease_break_noti(fp, NULL); if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { if (S_ISDIR(file_inode(filp)->i_mode)) { lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; lc->is_dir = true; } /* * Compare parent lease using parent key. If there is no * a lease that has same parent key, Send lease break * notification. */ smb_send_parent_lease_break_noti(fp, lc); req_op_level = smb2_map_lease_to_oplock(lc->req_state); ksmbd_debug(SMB, "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", name, req_op_level, lc->req_state); rc = find_same_lease_key(conn, fp->f_ci, lc); if (rc) goto err_out1; } else if (open_flags == O_RDONLY && (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) req_op_level = SMB2_OPLOCK_LEVEL_II; rc = smb_grant_oplock(work, req_op_level, fp->persistent_id, fp, le32_to_cpu(req->hdr.Id.SyncId.TreeId), lc, share_ret, smb3_hdr_replay(&req->hdr)); if (rc < 0) goto err_out1; } if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { smb_break_all_levII_oplock_for_delete(work, fp); ksmbd_fd_set_delete_on_close(fp, file_info); } if (need_truncate) { rc = smb2_create_truncate(&fp->filp->f_path); if (rc) goto err_out1; } if (req->CreateContextsOffset) { struct create_alloc_size_req *az_req; az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, SMB2_CREATE_ALLOCATION_SIZE, 4); if (IS_ERR(az_req)) { rc = PTR_ERR(az_req); goto err_out1; } else if (az_req) { int err; if (le16_to_cpu(az_req->ccontext.DataOffset) + le32_to_cpu(az_req->ccontext.DataLength) < sizeof(struct create_alloc_size_req)) { rc = -EINVAL; goto err_out1; } alloc_size = le64_to_cpu(az_req->AllocationSize); fp->allocation_size_set = true; ksmbd_debug(SMB, "request smb2 create allocate size : %llu\n", alloc_size); /* * fp->filp is the base file's data fork for a stream * handle (streams are xattr-backed on the same * underlying file) -- fallocate has no meaning for a * stream and would otherwise pre-allocate storage on * the base file's data instead. */ if (!ksmbd_stream_fd(fp)) { smb_break_all_levII_oplock(work, fp, 1); err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, alloc_size); if (err < 0) ksmbd_debug(SMB, "vfs_fallocate is failed : %d\n", err); } } context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out1; } else if (context) { ksmbd_debug(SMB, "get query on disk id context\n"); query_disk_id = 1; } if (test_share_config_flag(share, KSMBD_SHARE_FLAG_TIME_MACHINE)) { context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out1; } else if (context) { struct aapl_server_query_req *aapl_req; if (le32_to_cpu(context->DataLength) < sizeof(struct aapl_server_query_req)) { rc = -EINVAL; goto err_out1; } aapl_req = (struct aapl_server_query_req *) ((char *)context + le16_to_cpu(context->DataOffset)); if (le32_to_cpu(aapl_req->cmd) == SMB2_CRTCTX_AAPL_SERVER_QUERY) { conn->is_aapl = true; aapl_ctxt = true; aapl_req_bitmap = le64_to_cpu(aapl_req->req_bitmap); aapl_client_caps = le64_to_cpu(aapl_req->client_caps); } } } else if (conn->is_aapl == false) { context = smb2_find_context_vals(req, SMB2_CREATE_AAPL, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out1; } else if (context) conn->is_aapl = true; } } rc = ksmbd_vfs_getattr(&path, &stat); if (rc) goto err_out1; if (stat.result_mask & STATX_BTIME) fp->create_time = ksmbd_UnixTimeToNT(stat.btime); else fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); fp->change_time = ksmbd_UnixTimeToNT(stat.ctime); fp->allocation_size = S_ISDIR(stat.mode) ? 0 : (alloc_size ?: stat.blocks << 9); if (created || fp->f_ci->m_fattr == 0) fp->f_ci->m_fattr = cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); if (!created) smb2_update_xattrs(tcon, &path, fp); if (need_truncate && req->FileAttributes) { dos_attr = le32_to_cpu(req->FileAttributes); fp->f_ci->m_fattr = cpu_to_le32(smb2_get_dos_mode(&stat, dos_attr)); smb2_new_xattrs(tcon, &path, fp); } ksmbd_vfs_update_compressed_fattr(path.dentry, &fp->f_ci->m_fattr); if (created) { if (fp->coption & FILE_NO_COMPRESSION_LE) { rc = ksmbd_vfs_set_compression_create(work, fp, COMPRESSION_FORMAT_NONE); if (rc) fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_COMPRESSED_LE; rc = 0; } else if (smb2_parent_compressed(tcon, &path)) { rc = ksmbd_vfs_set_compression_create(work, fp, COMPRESSION_FORMAT_LZNT1); if (rc) fp->f_ci->m_fattr |= FILE_ATTRIBUTE_COMPRESSED_LE; rc = 0; } } if (created) smb2_new_xattrs(tcon, &path, fp); fp->create_action = cpu_to_le32(file_info); if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY) && (conn->vals->req_capabilities & SMB2_GLOBAL_CAP_PERSISTENT_HANDLES)) { /* MS-SMB2 3.3.5.9.10: a persistent open is durable too. */ fp->is_durable = true; fp->is_persistent = true; } else { fp->is_durable = true; } if (dh_info.type == DURABLE_REQ_V2) { if (dh_info.app_instance_id) memcpy(fp->app_instance_id, dh_info.AppInstanceId, SMB2_CREATE_GUID_SIZE); if (dh_info.timeout) fp->durable_timeout = min_t(unsigned int, dh_info.timeout, DURABLE_HANDLE_MAX_TIMEOUT); else fp->durable_timeout = 60000; } } /* * conn->is_aapl detection above (this function's create-context * parsing) is skipped on the reconnect path below, since a * reconnect always arrives on a fresh connection -- if the client * cares, it sends its own AAPL context on this same CREATE, which * this function's normal (non-reconnect) parsing already handles. */ reconnected_fp: if (dh_info.replay) file_info = le32_to_cpu(fp->create_action); rsp->StructureSize = cpu_to_le16(89); opinfo = opinfo_get(fp); rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; /* * A durable CREATE replay does not modify the existing open. When * replayed without an oplock, however, its response reflects that * request and cannot include a new durable-handle response context. */ if (dh_info.replay && !lc && req_op_level == SMB2_OPLOCK_LEVEL_NONE) { rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; durable_rsp = false; } rsp->Flags = 0; rsp->CreateAction = cpu_to_le32(file_info); rsp->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); rsp->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); fp->open_mtime = time; rsp->LastWriteTime = cpu_to_le64(time); rsp->ChangeTime = cpu_to_le64(fp->change_time); /* * The cached allocation size hides filesystem rounding for the * requested allocation, but it can go stale when the file grows past * it via writes (e.g. across a durable reconnect). Refresh it once the * file exceeds the cached value, rounding the end of file up to the * volume allocation unit (the filesystem block size, matching the * SectorsPerAllocationUnit/BytesPerSector ksmbd advertises) rather than * using the raw on-disk block count, which can include filesystem * preallocation and metadata rounding. */ if (ksmbd_stream_fd(fp)) { loff_t seof = ksmbd_stream_eof(fp); rsp->AllocationSize = cpu_to_le64((u64)seof); rsp->EndofFile = cpu_to_le64((u64)seof); } else { if (!S_ISDIR(stat.mode) && stat.size > fp->allocation_size) fp->allocation_size = round_up(stat.size, stat.blksize); rsp->AllocationSize = cpu_to_le64(fp->allocation_size); rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); } rsp->FileAttributes = fp->f_ci->m_fattr; rsp->Reserved2 = 0; rsp->PersistentFileId = fp->persistent_id; rsp->VolatileFileId = fp->volatile_id; rsp->CreateContextsOffset = 0; rsp->CreateContextsLength = 0; iov_len = offsetof(struct smb2_create_rsp, Buffer); /* If lease is request send lease context response */ if (opinfo && opinfo->is_lease) { struct create_context *lease_ccontext; ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", name, opinfo->o_lease->state); rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; lease_ccontext = (struct create_context *)rsp->Buffer; contxt_cnt++; create_lease_buf(rsp->Buffer, opinfo->o_lease); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_lease_size); iov_len += conn->vals->create_lease_size; next_ptr = &lease_ccontext->Next; next_off = conn->vals->create_lease_size; } opinfo_put(opinfo); if (maximal_access_ctxt) { struct create_context *mxac_ccontext; if (maximal_access == 0) ksmbd_vfs_query_maximal_access(idmap, path.dentry, &maximal_access); mxac_ccontext = (struct create_context *)(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); contxt_cnt++; create_mxac_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), le32_to_cpu(maximal_access)); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_mxac_size); iov_len += conn->vals->create_mxac_size; if (next_ptr) *next_ptr = cpu_to_le32(next_off); next_ptr = &mxac_ccontext->Next; next_off = conn->vals->create_mxac_size; } if (query_disk_id) { struct create_context *disk_id_ccontext; disk_id_ccontext = (struct create_context *)(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); contxt_cnt++; create_disk_id_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), stat.ino, tcon->id); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_disk_id_size); iov_len += conn->vals->create_disk_id_size; if (next_ptr) *next_ptr = cpu_to_le32(next_off); next_ptr = &disk_id_ccontext->Next; next_off = conn->vals->create_disk_id_size; } if (durable_rsp && (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2)) { struct create_context *durable_ccontext; durable_ccontext = (struct create_context *)(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); contxt_cnt++; if (dh_info.type == DURABLE_REQ) { create_durable_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_durable_size); iov_len += conn->vals->create_durable_size; } else { create_durable_v2_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), fp); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_durable_v2_size); iov_len += conn->vals->create_durable_v2_size; } if (next_ptr) *next_ptr = cpu_to_le32(next_off); next_ptr = &durable_ccontext->Next; next_off = dh_info.type == DURABLE_REQ ? conn->vals->create_durable_size : conn->vals->create_durable_v2_size; } if (posix_ctxt) { struct create_context *posix_ccontext; posix_ccontext = (struct create_context *)(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); contxt_cnt++; create_posix_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), fp); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_posix_size); iov_len += conn->vals->create_posix_size; if (next_ptr) *next_ptr = cpu_to_le32(next_off); next_ptr = &posix_ccontext->Next; next_off = conn->vals->create_posix_size; } /* * AAPL create context response: see smb2pdu.h for the capability * rationale. Scoped to TIME_MACHINE shares only. */ if (aapl_ctxt) { if (aapl_client_caps & SMB2_CRTCTX_AAPL_SUPPORTS_READ_DIR_ATTR) conn->aapl_readdir_attr = true; /* * V2 extends the same inline-FinderInfo mechanism (see * smb2pdu.h), so a V2-requesting client also gets * aapl_readdir_attr treatment -- the reply just advertises * the V2 bit instead of the V1 one (create_aapl_rsp_buf). */ if (aapl_client_caps & SMB2_CRTCTX_AAPL_SUPPORTS_READ_DIR_ATTR_V2) { conn->aapl_readdir_attr = true; conn->aapl_readdir_attr_v2 = true; } contxt_cnt++; create_aapl_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), SMB2_CRTCTX_AAPL_FULL_SYNC, aapl_req_bitmap, conn->aapl_readdir_attr_v2); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_aapl_size); iov_len += conn->vals->create_aapl_size; if (next_ptr) *next_ptr = cpu_to_le32(next_off); /* AAPL is last; next_ptr need not be updated */ } if (contxt_cnt > 0) { rsp->CreateContextsOffset = cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); } err_out: if (rc && (file_present || created)) path_put(&path); err_out1: ksmbd_revert_fsids(work); err_out2: if (!rc) { if (!dh_info.replay) rc = ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); if (!rc) rc = smb2_set_request_open(work, fp, &req->hdr, false, false); if (!rc) rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); } if (rc) { if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -EOPNOTSUPP) rsp->hdr.Status = STATUS_NOT_SUPPORTED; else if ((rc == -EACCES || rc == -ESTALE || rc == -EXDEV) && !rsp->hdr.Status) { if (req->DesiredAccess & FILE_ACCESS_SYSTEM_SECURITY_LE) rsp->hdr.Status = STATUS_PRIVILEGE_NOT_HELD; else rsp->hdr.Status = STATUS_ACCESS_DENIED; } else if (rc == -ENOENT) rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; else if (rc == -EPERM) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (rc == -EBUSY) rsp->hdr.Status = STATUS_DELETE_PENDING; else if (rc == -EBADF) rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; else if (rc == -ENOEXEC) rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; else if (rc == -ENXIO) rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; else if (rc == -EEXIST) rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; else if (rc == -EMFILE) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; else if (rc == -EINPROGRESS) rsp->hdr.Status = STATUS_FILE_NOT_AVAILABLE; else if (rc == -EAGAIN) rsp->hdr.Status = STATUS_FILE_NOT_AVAILABLE; if (!rsp->hdr.Status) rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; if (fp && !dh_info.replay) ksmbd_fd_put(work, fp); smb2_set_err_rsp(work); ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); } if (dh_info.replay) ksmbd_put_durable_fd(dh_info.fp); if (dh_info.reconnected) { /* * If reconnect succeeded, fp was republished in the * session file table. On a later error, ksmbd_fd_put() * above drops the session reference; drop the durable * lookup reference through the same session-aware path so * final close removes the volatile id before freeing fp. */ if (rc && fp == dh_info.fp) ksmbd_fd_put(work, dh_info.fp); else ksmbd_put_durable_fd(dh_info.fp); } kfree(name); kfree(lc); return rc; } static int readdir_info_level_struct_sz(int info_level) { switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: return sizeof(FILE_FULL_DIRECTORY_INFO); case FILE_BOTH_DIRECTORY_INFORMATION: return sizeof(FILE_BOTH_DIRECTORY_INFO); case FILE_DIRECTORY_INFORMATION: return sizeof(FILE_DIRECTORY_INFO); case FILE_NAMES_INFORMATION: return sizeof(struct file_names_info); case FILEID_FULL_DIRECTORY_INFORMATION: return sizeof(FILE_ID_FULL_DIR_INFO); case FILEID_BOTH_DIRECTORY_INFORMATION: return sizeof(struct file_id_both_directory_info); case SMB_FIND_FILE_POSIX_INFO: return sizeof(struct smb2_posix_info); default: return -EOPNOTSUPP; } } static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) { switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: { FILE_FULL_DIRECTORY_INFO *ffdinfo; ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->rptr; d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); d_info->name = ffdinfo->FileName; d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); return 0; } case FILE_BOTH_DIRECTORY_INFORMATION: { FILE_BOTH_DIRECTORY_INFO *fbdinfo; fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->rptr; d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); d_info->name = fbdinfo->FileName; d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); return 0; } case FILE_DIRECTORY_INFORMATION: { FILE_DIRECTORY_INFO *fdinfo; fdinfo = (FILE_DIRECTORY_INFO *)d_info->rptr; d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); d_info->name = fdinfo->FileName; d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); return 0; } case FILE_NAMES_INFORMATION: { struct file_names_info *fninfo; fninfo = (struct file_names_info *)d_info->rptr; d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); d_info->name = fninfo->FileName; d_info->name_len = le32_to_cpu(fninfo->FileNameLength); return 0; } case FILEID_FULL_DIRECTORY_INFORMATION: { FILE_ID_FULL_DIR_INFO *dinfo; dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->rptr; d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); d_info->name = dinfo->FileName; d_info->name_len = le32_to_cpu(dinfo->FileNameLength); return 0; } case FILEID_BOTH_DIRECTORY_INFORMATION: { struct file_id_both_directory_info *fibdinfo; fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); d_info->name = fibdinfo->FileName; d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); return 0; } case SMB_FIND_FILE_POSIX_INFO: { struct smb2_posix_info *posix_info; posix_info = (struct smb2_posix_info *)d_info->rptr; d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); d_info->name = posix_info->name; d_info->name_len = le32_to_cpu(posix_info->name_len); return 0; } default: return -EINVAL; } } /** * smb2_populate_readdir_entry() - encode directory entry in smb2 response * buffer * @conn: connection instance * @info_level: smb information level * @d_info: structure included variables for query dir * @ksmbd_kstat: ksmbd wrapper of dirent stat information * * if directory has many entries, find first can't read it fully. * find next might be called multiple times to read remaining dir entries * * Return: 0 on success, otherwise error */ static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, struct ksmbd_dir_info *d_info, struct ksmbd_kstat *ksmbd_kstat) { int next_entry_offset = 0; char *conv_name; int conv_len; void *kstat; int struct_sz, rc = 0; conv_name = ksmbd_convert_dir_info_name(d_info, conn->local_nls, &conv_len); if (!conv_name) return -ENOMEM; /* Somehow the name has only terminating NULL bytes */ if (conv_len < 0) { rc = -EINVAL; goto free_conv_name; } struct_sz = readdir_info_level_struct_sz(info_level); if (struct_sz == -EOPNOTSUPP) { rc = -EINVAL; goto free_conv_name; } struct_sz += conv_len; next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); d_info->last_entry_off_align = next_entry_offset - struct_sz; if (next_entry_offset > d_info->out_buf_len) { d_info->out_buf_len = 0; rc = -ENOSPC; goto free_conv_name; } kstat = d_info->wptr; if (info_level != FILE_NAMES_INFORMATION) kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: { FILE_FULL_DIRECTORY_INFO *ffdinfo; ffdinfo = (FILE_FULL_DIRECTORY_INFO *)kstat; ffdinfo->FileNameLength = cpu_to_le32(conv_len); ffdinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (ffdinfo->EaSize) ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; if (d_info->hide_dot_file && d_info->name[0] == '.') ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(ffdinfo->FileName, conv_name, conv_len); ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_BOTH_DIRECTORY_INFORMATION: { FILE_BOTH_DIRECTORY_INFO *fbdinfo; fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)kstat; fbdinfo->FileNameLength = cpu_to_le32(conv_len); fbdinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (fbdinfo->EaSize) fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; fbdinfo->ShortNameLength = 0; fbdinfo->Reserved = 0; if (d_info->hide_dot_file && d_info->name[0] == '.') fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(fbdinfo->FileName, conv_name, conv_len); fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_DIRECTORY_INFORMATION: { FILE_DIRECTORY_INFO *fdinfo; fdinfo = (FILE_DIRECTORY_INFO *)kstat; fdinfo->FileNameLength = cpu_to_le32(conv_len); if (d_info->hide_dot_file && d_info->name[0] == '.') fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(fdinfo->FileName, conv_name, conv_len); fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_NAMES_INFORMATION: { struct file_names_info *fninfo; fninfo = (struct file_names_info *)kstat; fninfo->FileNameLength = cpu_to_le32(conv_len); memcpy(fninfo->FileName, conv_name, conv_len); fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_FULL_DIRECTORY_INFORMATION: { FILE_ID_FULL_DIR_INFO *dinfo; dinfo = (FILE_ID_FULL_DIR_INFO *)kstat; dinfo->FileNameLength = cpu_to_le32(conv_len); dinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (dinfo->EaSize) dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; dinfo->Reserved = 0; if (conn->is_aapl) dinfo->UniqueId = 0; else dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); if (d_info->hide_dot_file && d_info->name[0] == '.') dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(dinfo->FileName, conv_name, conv_len); dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_BOTH_DIRECTORY_INFORMATION: { struct file_id_both_directory_info *fibdinfo; fibdinfo = (struct file_id_both_directory_info *)kstat; fibdinfo->FileNameLength = cpu_to_le32(conv_len); if (conn->is_aapl) fibdinfo->UniqueId = 0; else fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); fibdinfo->ShortNameLength = 0; fibdinfo->Reserved = 0; if (conn->aapl_readdir_attr) { /* * READDIR_ATTR wire format, confirmed against reference server's * reference implementation marshalling (reference implementation behavior): * EaSize = max_access (expanded specific * rights, simplified to "grant all") * ShortNameLength = 24 (fixed; not 0, despite the spec) * ShortName[0..7] = resource fork size (uint64 LE, 0 = no rfork) * ShortName[8..23] = compressed FinderInfo (type+creator+flags+ * ext_flags+date_added, 16 bytes LE; all * zeros means type=0/creator=0, i.e. use * the file extension for icon lookup) * Reserved2 = Unix mode bits (uint16 LE) * Reparse-point tag is indicated via ExtFileAttributes, not EaSize. * * V2 (conn->aapl_readdir_attr_v2): ShortNameLength+Reserved * are read as a single flags field instead of being ignored * -- see smb2pdu.h for the wire-format confirmation and * AAPL_READDIR_ATTR_V2_NO_XATTR's meaning. */ __le32 reparse_tag = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (reparse_tag) fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; /* * FILE_GENERIC_ALL_LE (0x10000000) is the raw * "generic all" meta-bit -- valid only in a * client's requested access mask, for the server * to expand. It has none of the specific FILE_* * rights bits set (FILE_LIST_DIRECTORY, FILE_TRAVERSE, * etc.), so reporting it here as max_access would make * macOS's bit-by-bit access checks fail on every * entry -> permanent "no entry" badges in Finder. * Report the actual expanded rights instead, same * as smb_map_generic_desired_access() does when * translating a client's GENERIC_ALL request. */ fibdinfo->EaSize = cpu_to_le32(GENERIC_ALL_FLAGS); /* * The spec says ShortNameLength should be 0 when * there's no short name; 24 here instead matches * reference implementation marshalling (reference * behavior) for server-to-server wire parity. * V2 repurposes it as a flags field that is * interpreted; V1 doesn't. Either value is safe * here, so keep 24 for parity. */ if (conn->aapl_readdir_attr_v2) { /* * V2 repurposes this field as flags (see comment * above) -- 24 is a V1-only convention that real * macOS clients ignore outright, so don't reuse it * here as a base value for a field V2 clients * actually interpret. */ fibdinfo->ShortNameLength = 0; if (!ksmbd_kstat->has_ads_stream) fibdinfo->ShortNameLength = AAPL_READDIR_ATTR_V2_NO_XATTR; } else { fibdinfo->ShortNameLength = 24; } memset(fibdinfo->ShortName, 0, sizeof(fibdinfo->ShortName)); fibdinfo->Reserved2 = cpu_to_le16(ksmbd_kstat->kstat->mode & 0xffff); } else { fibdinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (fibdinfo->EaSize) fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; fibdinfo->Reserved2 = cpu_to_le16(0); } if (d_info->hide_dot_file && d_info->name[0] == '.') fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(fibdinfo->FileName, conv_name, conv_len); fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case SMB_FIND_FILE_POSIX_INFO: { struct smb2_posix_info *posix_info; u64 time; posix_info = (struct smb2_posix_info *)kstat; posix_info->Ignored = 0; posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); posix_info->ChangeTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); posix_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); posix_info->LastWriteTime = cpu_to_le64(time); posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); switch (ksmbd_kstat->kstat->mode & S_IFMT) { case S_IFDIR: posix_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); break; case S_IFLNK: posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); break; case S_IFCHR: posix_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); break; case S_IFBLK: posix_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); break; case S_IFIFO: posix_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); break; case S_IFSOCK: posix_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); } posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); posix_info->DosAttributes = S_ISDIR(ksmbd_kstat->kstat->mode) ? FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; if (d_info->hide_dot_file && d_info->name[0] == '.') posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; /* * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + * sub_auth(4 * 1(num_subauth)) + RID(4). */ id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); memcpy(posix_info->name, conv_name, conv_len); posix_info->name_len = cpu_to_le32(conv_len); posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } } /* switch (info_level) */ d_info->last_entry_offset = d_info->data_count; d_info->data_count += next_entry_offset; d_info->out_buf_len -= next_entry_offset; d_info->wptr += next_entry_offset; ksmbd_debug(SMB, "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", info_level, d_info->out_buf_len, next_entry_offset, d_info->data_count); free_conv_name: kfree(conv_name); return rc; } struct smb2_query_dir_private { struct ksmbd_work *work; char *search_pattern; struct ksmbd_file *dir_fp; struct ksmbd_dir_info *d_info; int info_level; }; static int process_query_dir_entries(struct smb2_query_dir_private *priv) { struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); struct kstat kstat; struct ksmbd_kstat ksmbd_kstat; int rc; int i; for (i = 0; i < priv->d_info->num_entry; i++) { struct dentry *dent; struct path path; if (dentry_name(priv->d_info, priv->info_level)) return -EINVAL; dent = lookup_one_unlocked(idmap, &QSTR_LEN(priv->d_info->name, priv->d_info->name_len), priv->dir_fp->filp->f_path.dentry); if (IS_ERR(dent)) { ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", priv->d_info->name, PTR_ERR(dent)); continue; } if (unlikely(d_is_negative(dent))) { dput(dent); ksmbd_debug(SMB, "Negative dentry `%s'\n", priv->d_info->name); continue; } if (test_share_config_flag(priv->work->tcon->share_conf, KSMBD_SHARE_FLAG_HIDE_UNREADABLE)) { __le32 daccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | FILE_READ_ATTRIBUTES_LE; path.mnt = priv->dir_fp->filp->f_path.mnt; path.dentry = dent; rc = smb_check_perm_dacl(priv->work->conn, &path, &daccess, daccess, priv->work->sess->user->uid, true); if (rc) { dput(dent); continue; } } ksmbd_kstat.kstat = &kstat; if (priv->info_level != FILE_NAMES_INFORMATION) { rc = ksmbd_vfs_fill_dentry_attrs(priv->work, idmap, dent, &ksmbd_kstat); if (rc) { dput(dent); continue; } } rc = smb2_populate_readdir_entry(priv->work->conn, priv->info_level, priv->d_info, &ksmbd_kstat); dput(dent); if (rc) return rc; } return 0; } static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, int info_level) { int struct_sz; int conv_len; int next_entry_offset; struct_sz = readdir_info_level_struct_sz(info_level); if (struct_sz == -EOPNOTSUPP) return -EOPNOTSUPP; conv_len = (d_info->name_len + 1) * 2; next_entry_offset = ALIGN(struct_sz + conv_len, KSMBD_DIR_INFO_ALIGNMENT); if (next_entry_offset > d_info->out_buf_len) { d_info->out_buf_len = 0; return -ENOSPC; } switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: { FILE_FULL_DIRECTORY_INFO *ffdinfo; ffdinfo = (FILE_FULL_DIRECTORY_INFO *)d_info->wptr; memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); ffdinfo->FileName[d_info->name_len] = 0x00; ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_BOTH_DIRECTORY_INFORMATION: { FILE_BOTH_DIRECTORY_INFO *fbdinfo; fbdinfo = (FILE_BOTH_DIRECTORY_INFO *)d_info->wptr; memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); fbdinfo->FileName[d_info->name_len] = 0x00; fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_DIRECTORY_INFORMATION: { FILE_DIRECTORY_INFO *fdinfo; fdinfo = (FILE_DIRECTORY_INFO *)d_info->wptr; memcpy(fdinfo->FileName, d_info->name, d_info->name_len); fdinfo->FileName[d_info->name_len] = 0x00; fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_NAMES_INFORMATION: { struct file_names_info *fninfo; fninfo = (struct file_names_info *)d_info->wptr; memcpy(fninfo->FileName, d_info->name, d_info->name_len); fninfo->FileName[d_info->name_len] = 0x00; fninfo->FileNameLength = cpu_to_le32(d_info->name_len); fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_FULL_DIRECTORY_INFORMATION: { FILE_ID_FULL_DIR_INFO *dinfo; dinfo = (FILE_ID_FULL_DIR_INFO *)d_info->wptr; memcpy(dinfo->FileName, d_info->name, d_info->name_len); dinfo->FileName[d_info->name_len] = 0x00; dinfo->FileNameLength = cpu_to_le32(d_info->name_len); dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_BOTH_DIRECTORY_INFORMATION: { struct file_id_both_directory_info *fibdinfo; fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); fibdinfo->FileName[d_info->name_len] = 0x00; fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case SMB_FIND_FILE_POSIX_INFO: { struct smb2_posix_info *posix_info; posix_info = (struct smb2_posix_info *)d_info->wptr; memcpy(posix_info->name, d_info->name, d_info->name_len); posix_info->name[d_info->name_len] = 0x00; posix_info->name_len = cpu_to_le32(d_info->name_len); posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } } /* switch (info_level) */ d_info->num_entry++; d_info->out_buf_len -= next_entry_offset; d_info->wptr += next_entry_offset; return 0; } static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, loff_t offset, u64 ino, unsigned int d_type) { struct ksmbd_readdir_data *buf; struct smb2_query_dir_private *priv; struct ksmbd_dir_info *d_info; int rc; buf = container_of(ctx, struct ksmbd_readdir_data, ctx); priv = buf->private; d_info = priv->d_info; /* dot and dotdot entries are already reserved */ if (!strcmp(".", name) || !strcmp("..", name)) return true; d_info->num_scan++; if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) return true; if (!match_pattern(name, namlen, priv->search_pattern)) return true; d_info->name = name; d_info->name_len = namlen; rc = reserve_populate_dentry(d_info, priv->info_level); if (rc) return false; if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) d_info->out_buf_len = 0; return true; } static int verify_info_level(int info_level) { switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: case FILE_BOTH_DIRECTORY_INFORMATION: case FILE_DIRECTORY_INFORMATION: case FILE_NAMES_INFORMATION: case FILEID_FULL_DIRECTORY_INFORMATION: case FILEID_BOTH_DIRECTORY_INFORMATION: case SMB_FIND_FILE_POSIX_INFO: break; default: return -EOPNOTSUPP; } return 0; } static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) { int free_len; free_len = (int)(work->response_sz - (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; return free_len; } static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, unsigned short hdr2_len, unsigned int out_buf_len) { int free_len; if (out_buf_len > work->conn->vals->max_trans_size) return -EINVAL; free_len = smb2_resp_buf_len(work, hdr2_len); if (free_len < 0) return -EINVAL; return min_t(int, out_buf_len, free_len); } int smb2_query_dir(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_query_directory_req *req; struct smb2_query_directory_rsp *rsp; struct ksmbd_share_config *share = work->tcon->share_conf; struct ksmbd_file *dir_fp = NULL; struct ksmbd_dir_info d_info; int rc = 0; char *srch_ptr = NULL; unsigned char srch_flag; int buffer_sz; struct smb2_query_dir_private query_dir_private = {NULL, }; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; ksmbd_debug(SMB, "Received smb2 query directory request\n"); WORK_BUFFERS(work, req, rsp); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (work->next_smb2_rcv_hdr_off && !has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } if (ksmbd_override_fsids(work)) { rsp->hdr.Status = STATUS_NO_MEMORY; smb2_set_err_rsp(work); return -ENOMEM; } rc = verify_info_level(req->FileInformationClass); if (rc) { rc = -EFAULT; goto err_out2; } dir_fp = ksmbd_lookup_fd_slow(work, id, pid); if (!dir_fp) { rc = -EBADF; goto err_out2; } if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || inode_permission(file_mnt_idmap(dir_fp->filp), file_inode(dir_fp->filp), MAY_READ | MAY_EXEC)) { pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); rc = -EACCES; goto err_out2; } if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { pr_err("can't do query dir for a file\n"); rc = -EINVAL; goto err_out2; } srch_flag = req->Flags; srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), le16_to_cpu(req->FileNameLength), 1, conn->local_nls); if (IS_ERR(srch_ptr)) { ksmbd_debug(SMB, "Search Pattern not found\n"); rc = -EINVAL; goto err_out2; } else { ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); } mutex_lock(&dir_fp->readdir_lock); if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { ksmbd_debug(SMB, "Restart directory scan\n"); generic_file_llseek(dir_fp->filp, 0, SEEK_SET); } memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); d_info.wptr = (char *)rsp->Buffer; d_info.rptr = (char *)rsp->Buffer; d_info.out_buf_len = smb2_calc_max_out_buf_len(work, offsetof(struct smb2_query_directory_rsp, Buffer), le32_to_cpu(req->OutputBufferLength)); if (d_info.out_buf_len < 0) { rc = -EINVAL; goto err_out; } d_info.flags = srch_flag; /* * reserve dot and dotdot entries in head of buffer * in first response */ rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, dir_fp, &d_info, srch_ptr, smb2_populate_readdir_entry); if (rc == -ENOSPC) rc = 0; else if (rc) goto err_out; if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) d_info.hide_dot_file = true; buffer_sz = d_info.out_buf_len; d_info.rptr = d_info.wptr; query_dir_private.work = work; query_dir_private.search_pattern = srch_ptr; query_dir_private.dir_fp = dir_fp; query_dir_private.d_info = &d_info; query_dir_private.info_level = req->FileInformationClass; dir_fp->readdir_data.private = &query_dir_private; set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); again: d_info.num_scan = 0; rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); /* * num_entry can be 0 if the directory iteration stops before reaching * the end of the directory and no file is matched with the search * pattern. */ if (rc >= 0 && !d_info.num_entry && d_info.num_scan && d_info.out_buf_len > 0) goto again; /* * req->OutputBufferLength is too small to contain even one entry. * In this case, it immediately returns OutputBufferLength 0 to client. */ if (!d_info.out_buf_len && !d_info.num_entry) goto no_buf_len; if (rc > 0 || rc == -ENOSPC) rc = 0; else if (rc) goto err_out; d_info.wptr = d_info.rptr; d_info.out_buf_len = buffer_sz; rc = process_query_dir_entries(&query_dir_private); if (rc) goto err_out; if (!d_info.data_count && d_info.out_buf_len >= 0) { if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { rsp->hdr.Status = STATUS_NO_SUCH_FILE; } else { dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; rsp->hdr.Status = STATUS_NO_MORE_FILES; } rsp->StructureSize = cpu_to_le16(9); rsp->OutputBufferOffset = cpu_to_le16(0); rsp->OutputBufferLength = cpu_to_le32(0); rsp->Buffer[0] = 0; rc = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_query_directory_rsp, Buffer) + 1); if (rc) goto err_out; } else { no_buf_len: ((FILE_DIRECTORY_INFO *) ((char *)rsp->Buffer + d_info.last_entry_offset)) ->NextEntryOffset = 0; if (d_info.data_count >= d_info.last_entry_off_align) d_info.data_count -= d_info.last_entry_off_align; rsp->StructureSize = cpu_to_le16(9); rsp->OutputBufferOffset = cpu_to_le16(72); rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); rc = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_query_directory_rsp, Buffer) + d_info.data_count); if (rc) goto err_out; } mutex_unlock(&dir_fp->readdir_lock); kfree(srch_ptr); ksmbd_fd_put(work, dir_fp); ksmbd_revert_fsids(work); return 0; err_out: pr_err("error while processing smb2 query dir rc = %d\n", rc); mutex_unlock(&dir_fp->readdir_lock); kfree(srch_ptr); err_out2: if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_NO_SUCH_FILE; else if (rc == -EBADF) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (rc == -ENOMEM) rsp->hdr.Status = STATUS_NO_MEMORY; else if (rc == -EFAULT) rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; else if (rc == -EIO) rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; if (!rsp->hdr.Status) rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; smb2_set_err_rsp(work); ksmbd_fd_put(work, dir_fp); ksmbd_revert_fsids(work); return rc; } /** * buffer_check_err() - helper function to check buffer errors * @reqOutputBufferLength: max buffer length expected in command response * @fixed_len: minimum fixed response length * @rsp: query info response buffer contains output buffer length * @rsp_org: base response buffer pointer in case of chained response * * Return: 0 on success, otherwise error */ static int buffer_check_err(int reqOutputBufferLength, unsigned int fixed_len, struct smb2_query_info_rsp *rsp, void *rsp_org) { unsigned int output_len = le32_to_cpu(rsp->OutputBufferLength); if (reqOutputBufferLength < fixed_len) { pr_err("Invalid Buffer Size Requested\n"); rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); return -EINVAL; } if (reqOutputBufferLength < output_len) { rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; rsp->OutputBufferLength = cpu_to_le32(reqOutputBufferLength); } return 0; } static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_file_standard_info *sinfo; sinfo = (struct smb2_file_standard_info *)rsp->Buffer; sinfo->AllocationSize = cpu_to_le64(4096); sinfo->EndOfFile = cpu_to_le64(0); sinfo->NumberOfLinks = cpu_to_le32(1); sinfo->DeletePending = 1; sinfo->Directory = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_standard_info)); } static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, void *rsp_org) { struct smb2_file_internal_info *file_info; file_info = (struct smb2_file_internal_info *)rsp->Buffer; /* any unique number */ file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_internal_info)); } static int smb2_get_info_file_pipe(struct ksmbd_session *sess, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp, void *rsp_org) { u64 id; int rc; /* * Windows can sometime send query file info request on * pipe without opening it, checking error condition here */ id = req->VolatileFileId; lockdep_assert_not_held(&sess->rpc_lock); down_read(&sess->rpc_lock); if (!ksmbd_session_rpc_method(sess, id)) { up_read(&sess->rpc_lock); return -ENOENT; } up_read(&sess->rpc_lock); ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", req->FileInfoClass, req->VolatileFileId); switch (req->FileInfoClass) { case FILE_STANDARD_INFORMATION: get_standard_info_pipe(rsp, rsp_org); rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), le32_to_cpu(rsp->OutputBufferLength), rsp, rsp_org); break; case FILE_INTERNAL_INFORMATION: get_internal_info_pipe(rsp, id, rsp_org); rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), le32_to_cpu(rsp->OutputBufferLength), rsp, rsp_org); break; default: ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", req->FileInfoClass); rc = -EOPNOTSUPP; } return rc; } /** * smb2_get_ea() - handler for smb2 get extended attribute command * @work: smb work containing query info command buffer * @fp: ksmbd_file pointer * @req: get extended attribute request * @rsp: response buffer pointer * @rsp_org: base response buffer pointer in case of chained response * * Return: 0 on success, otherwise error */ static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_ea_info *eainfo, *prev_eainfo; char *name, *ptr, *xattr_list = NULL, *buf; int rc, name_len, value_len, xattr_list_len, idx; ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; struct smb2_ea_info_req *ea_req = NULL; const struct path *path; struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); if (!(fp->daccess & FILE_READ_EA_LE)) { pr_err("Not permitted to read ext attr : 0x%x\n", fp->daccess); return -EACCES; } path = &fp->filp->f_path; /* single EA entry is requested with given user.* name */ if (req->InputBufferLength) { if (le32_to_cpu(req->InputBufferLength) <= sizeof(struct smb2_ea_info_req)) return -EINVAL; ea_req = (struct smb2_ea_info_req *)((char *)req + le16_to_cpu(req->InputBufferOffset)); if (le32_to_cpu(req->InputBufferLength) < offsetof(struct smb2_ea_info_req, name) + ea_req->EaNameLength) return -EINVAL; } else { /* need to send all EAs, if no specific EA is requested*/ if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) ksmbd_debug(SMB, "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", le32_to_cpu(req->Flags)); } buf_free_len = smb2_calc_max_out_buf_len(work, offsetof(struct smb2_query_info_rsp, Buffer), le32_to_cpu(req->OutputBufferLength)); if (buf_free_len < 0) return -EINVAL; rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (rc < 0) { rsp->hdr.Status = STATUS_INVALID_HANDLE; goto out; } else if (!rc) { /* there is no EA in the file */ ksmbd_debug(SMB, "no ea data in the file\n"); goto done; } xattr_list_len = rc; ptr = (char *)rsp->Buffer; eainfo = (struct smb2_ea_info *)ptr; prev_eainfo = eainfo; idx = 0; while (idx < xattr_list_len) { name = xattr_list + idx; name_len = strlen(name); ksmbd_debug(SMB, "%s, len %d\n", name, name_len); idx += name_len + 1; /* * CIFS does not support EA other than user.* namespace, * still keep the framework generic, to list other attrs * in future. */ if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) continue; if (req->InputBufferLength && strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, ea_req->EaNameLength)) continue; if (smb2_is_private_ea(&name[XATTR_USER_PREFIX_LEN], name_len - XATTR_USER_PREFIX_LEN)) continue; if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) name_len -= XATTR_USER_PREFIX_LEN; ptr = eainfo->name + name_len + 1; buf_free_len -= (offsetof(struct smb2_ea_info, name) + name_len + 1); /* bailout if xattr can't fit in buf_free_len */ value_len = ksmbd_vfs_getxattr(idmap, path->dentry, name, &buf); if (value_len <= 0) { rc = -ENOENT; rsp->hdr.Status = STATUS_INVALID_HANDLE; goto out; } buf_free_len -= value_len; if (buf_free_len < 0) { kfree(buf); break; } memcpy(ptr, buf, value_len); kfree(buf); ptr += value_len; eainfo->Flags = 0; eainfo->EaNameLength = name_len; if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], name_len); else memcpy(eainfo->name, name, name_len); eainfo->name[name_len] = '\0'; eainfo->EaValueLength = cpu_to_le16(value_len); next_offset = offsetof(struct smb2_ea_info, name) + name_len + 1 + value_len; /* align next xattr entry at 4 byte bundary */ alignment_bytes = ((next_offset + 3) & ~3) - next_offset; if (alignment_bytes) { if (buf_free_len < alignment_bytes) break; memset(ptr, '\0', alignment_bytes); ptr += alignment_bytes; next_offset += alignment_bytes; buf_free_len -= alignment_bytes; } eainfo->NextEntryOffset = cpu_to_le32(next_offset); prev_eainfo = eainfo; eainfo = (struct smb2_ea_info *)ptr; rsp_data_cnt += next_offset; if (req->InputBufferLength) { ksmbd_debug(SMB, "single entry requested\n"); break; } } /* no more ea entries */ prev_eainfo->NextEntryOffset = 0; done: rc = 0; if (rsp_data_cnt == 0) rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); out: kvfree(xattr_list); return rc; } static void get_file_access_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_access_info *file_info; file_info = (struct smb2_file_access_info *)rsp->Buffer; file_info->AccessFlags = fp->daccess; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_access_info)); } static int get_file_basic_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct file_basic_info *basic_info; struct kstat stat; u64 time; int ret; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { pr_err("no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; basic_info = (struct file_basic_info *)rsp->Buffer; basic_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); basic_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); basic_info->LastWriteTime = cpu_to_le64(time); basic_info->ChangeTime = cpu_to_le64(fp->change_time); basic_info->Attributes = fp->f_ci->m_fattr; basic_info->Pad = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct file_basic_info)); return 0; } static int get_file_allocation_stat(struct ksmbd_file *fp, struct kstat *stat) { int ret; /* * Buffered writes can leave delayed allocation in a state where two * consecutive queries report different block counts even when the * second write only overwrites the first one. Complete writeback before * reporting the filesystem allocation for an ordinary open. */ if (!fp->allocation_size_set) { ret = file_write_and_wait(fp->filp); if (ret) return ret; } ret = vfs_getattr(&fp->filp->f_path, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (!ret && !fp->allocation_size_set) fp->allocation_size = S_ISDIR(stat->mode) ? 0 : stat->blocks << 9; return ret; } static int get_file_standard_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_standard_info *sinfo; unsigned int delete_pending; struct kstat stat; int ret; ret = get_file_allocation_stat(fp, &stat); if (ret) return ret; sinfo = (struct smb2_file_standard_info *)rsp->Buffer; delete_pending = ksmbd_inode_pending_delete(fp); if (ksmbd_stream_fd(fp) == false) { sinfo->AllocationSize = cpu_to_le64(fp->allocation_size); sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); } else { loff_t seof = ksmbd_stream_eof(fp); sinfo->AllocationSize = cpu_to_le64((u64)seof); sinfo->EndOfFile = cpu_to_le64((u64)seof); } sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); sinfo->DeletePending = delete_pending; sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_standard_info)); return 0; } static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_file_alignment_info *file_info; file_info = (struct smb2_file_alignment_info *)rsp->Buffer; file_info->AlignmentRequirement = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_alignment_info)); } static int get_file_all_info(struct ksmbd_work *work, struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct ksmbd_conn *conn = work->conn; struct smb2_file_all_info *file_info; unsigned int delete_pending; struct kstat stat; int conv_len; char *filename; u64 time; int ret, buf_free_len, filename_len; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); if (IS_ERR(filename)) return PTR_ERR(filename); filename_len = strlen(filename); buf_free_len = smb2_resp_buf_len(work, offsetof(struct smb2_query_info_rsp, Buffer) + offsetof(struct smb2_file_all_info, FileName)); if (buf_free_len < (filename_len + 1) * 2) { kfree(filename); return -EINVAL; } ret = get_file_allocation_stat(fp, &stat); if (ret) { kfree(filename); return ret; } ksmbd_debug(SMB, "filename = %s\n", filename); delete_pending = ksmbd_inode_pending_delete(fp); file_info = (struct smb2_file_all_info *)rsp->Buffer; file_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); file_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); file_info->LastWriteTime = cpu_to_le64(time); file_info->ChangeTime = cpu_to_le64(fp->change_time); file_info->Attributes = fp->f_ci->m_fattr; file_info->Pad1 = 0; if (ksmbd_stream_fd(fp) == false) { file_info->AllocationSize = cpu_to_le64(fp->allocation_size); file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); } else { loff_t seof = ksmbd_stream_eof(fp); file_info->AllocationSize = cpu_to_le64((u64)seof); file_info->EndOfFile = cpu_to_le64((u64)seof); } file_info->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); file_info->DeletePending = delete_pending; file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; file_info->Pad2 = 0; file_info->IndexNumber = cpu_to_le64(stat.ino); file_info->EASize = 0; file_info->AccessFlags = fp->daccess; if (ksmbd_stream_fd(fp) == false) file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); else file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); file_info->Mode = fp->coption; file_info->AlignmentRequirement = 0; conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, min(filename_len, PATH_MAX), conn->local_nls, 0); conv_len *= 2; file_info->FileNameLength = cpu_to_le32(conv_len); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); kfree(filename); return 0; } static void get_file_alternate_info(struct ksmbd_work *work, struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct ksmbd_conn *conn = work->conn; struct smb2_file_alt_name_info *file_info; struct dentry *dentry = fp->filp->f_path.dentry; int conv_len; spin_lock(&dentry->d_lock); file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; conv_len = ksmbd_extract_shortname(conn, dentry->d_name.name, file_info->FileName); spin_unlock(&dentry->d_lock); file_info->FileNameLength = cpu_to_le32(conv_len); rsp->OutputBufferLength = cpu_to_le32(struct_size(file_info, FileName, conv_len)); } static char *smb2_get_normalized_stream_name(struct ksmbd_file *fp) { char *name, *stream_name = NULL, *xattr_list = NULL; ssize_t xattr_list_len; if (!ksmbd_stream_fd(fp)) return NULL; xattr_list_len = ksmbd_vfs_listxattr(fp->filp->f_path.dentry, &xattr_list); if (xattr_list_len <= 0) goto out; for (name = xattr_list; name - xattr_list < xattr_list_len; name += strlen(name) + 1) { char *type; if (strlen(name) + 1 != fp->stream.size || strncasecmp(name, fp->stream.name, fp->stream.size - 1)) continue; name += XATTR_NAME_STREAM_LEN; type = strrchr(name, ':'); if (type) stream_name = kstrndup(name, type - name, KSMBD_DEFAULT_GFP); break; } out: kvfree(xattr_list); return stream_name; } static int get_file_normalized_name_info(struct ksmbd_work *work, struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp) { struct smb2_file_alt_name_info *file_info; char *filename, *normalized, *stream_name; int buf_free_len, conv_len, filename_len; if (work->conn->dialect < SMB311_PROT_ID) { rsp->hdr.Status = STATUS_NOT_SUPPORTED; return -EOPNOTSUPP; } filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); if (IS_ERR(filename)) return PTR_ERR(filename); if (filename[0] == '\\') memmove(filename, filename + 1, strlen(filename)); stream_name = smb2_get_normalized_stream_name(fp); normalized = kasprintf(KSMBD_DEFAULT_GFP, "%s%s%s", filename, stream_name ? ":" : "", stream_name ? stream_name : ""); kfree(stream_name); kfree(filename); if (!normalized) return -ENOMEM; filename_len = strlen(normalized); buf_free_len = smb2_resp_buf_len(work, sizeof(*rsp) + sizeof(*file_info)); if (buf_free_len < 0 || (size_t)buf_free_len < (filename_len + 1) * sizeof(__le16)) { kfree(normalized); return -EINVAL; } file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, normalized, filename_len, work->conn->local_nls, 0); kfree(normalized); conv_len *= 2; file_info->FileNameLength = cpu_to_le32(conv_len); rsp->OutputBufferLength = cpu_to_le32(sizeof(*file_info) + conv_len); return 0; } static int get_file_stream_info(struct ksmbd_work *work, struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct ksmbd_conn *conn = work->conn; struct smb2_file_stream_info *file_info; char *stream_name, *xattr_list = NULL, *stream_buf; struct kstat stat; const struct path *path = &fp->filp->f_path; ssize_t xattr_list_len; ssize_t slen; loff_t ssize; int nbytes = 0, streamlen, stream_name_len, next, idx = 0; int buf_free_len; int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; file_info = (struct smb2_file_stream_info *)rsp->Buffer; buf_free_len = smb2_resp_buf_len(work, offsetof(struct smb2_query_info_rsp, Buffer)); if (buf_free_len < 0) goto out; xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (xattr_list_len < 0) { goto out; } else if (!xattr_list_len) { ksmbd_debug(SMB, "empty xattr in the file\n"); goto out; } while (idx < xattr_list_len) { stream_name = xattr_list + idx; streamlen = strlen(stream_name); idx += streamlen + 1; ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN)) continue; stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + STREAM_PREFIX_LEN); streamlen = stream_name_len; /* plus : size */ streamlen += 1; stream_buf = kmalloc(streamlen + 1, KSMBD_DEFAULT_GFP); if (!stream_buf) break; streamlen = snprintf(stream_buf, streamlen + 1, ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); next = sizeof(struct smb2_file_stream_info) + streamlen * 2; if (next > buf_free_len) { kfree(stream_buf); break; } file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, stream_buf, streamlen, conn->local_nls, 0); streamlen *= 2; kfree(stream_buf); file_info->StreamNameLength = cpu_to_le32(streamlen); /* * stream_name_len is the byte length of the xattr's *name*, * not its value -- same class of bug ksmbd_stream_eof() * (smb2pdu.c) already fixes for EndOfFile/AllocationSize on * a stream handle; this enumeration path needs the same * real xattr value length, not the name length reused as a * size. */ slen = ksmbd_vfs_casexattr_len(file_mnt_idmap(fp->filp), path->dentry, stream_name, strlen(stream_name) + 1); ssize = slen < 0 ? 0 : (loff_t)slen; file_info->StreamSize = cpu_to_le64(ssize); file_info->StreamAllocationSize = cpu_to_le64(ssize); nbytes += next; buf_free_len -= next; file_info->NextEntryOffset = cpu_to_le32(next); } out: if (!S_ISDIR(stat.mode) && buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { file_info = (struct smb2_file_stream_info *) &rsp->Buffer[nbytes]; streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, "::$DATA", 7, conn->local_nls, 0); streamlen *= 2; file_info->StreamNameLength = cpu_to_le32(streamlen); file_info->StreamSize = cpu_to_le64(stat.size); file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); nbytes += sizeof(struct smb2_file_stream_info) + streamlen; } /* last entry offset should be 0 */ file_info->NextEntryOffset = 0; kvfree(xattr_list); rsp->OutputBufferLength = cpu_to_le32(nbytes); return 0; } static int get_file_internal_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_internal_info *file_info; struct kstat stat; int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; file_info = (struct smb2_file_internal_info *)rsp->Buffer; file_info->IndexNumber = cpu_to_le64(stat.ino); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_internal_info)); return 0; } static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_network_open_info *file_info; struct kstat stat; u64 time; int ret; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { pr_err("no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } ret = get_file_allocation_stat(fp, &stat); if (ret) return ret; file_info = (struct smb2_file_network_open_info *)rsp->Buffer; file_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); file_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); file_info->LastWriteTime = cpu_to_le64(time); file_info->ChangeTime = cpu_to_le64(fp->change_time); file_info->Attributes = fp->f_ci->m_fattr; if (ksmbd_stream_fd(fp) == false) { file_info->AllocationSize = cpu_to_le64(fp->allocation_size); file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); } else { loff_t seof = ksmbd_stream_eof(fp); file_info->AllocationSize = cpu_to_le64((u64)seof); file_info->EndOfFile = cpu_to_le64((u64)seof); } file_info->Reserved = cpu_to_le32(0); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_network_open_info)); return 0; } static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_file_ea_info *file_info; file_info = (struct smb2_file_ea_info *)rsp->Buffer; file_info->EASize = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_ea_info)); } static void get_file_position_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_pos_info *file_info; file_info = (struct smb2_file_pos_info *)rsp->Buffer; if (ksmbd_stream_fd(fp) == false) file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); else file_info->CurrentByteOffset = cpu_to_le64(fp->stream.pos); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_pos_info)); } static void get_file_mode_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_mode_info *file_info; file_info = (struct smb2_file_mode_info *)rsp->Buffer; file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_mode_info)); } static int get_file_compression_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_comp_info *file_info; struct kstat stat; u16 fmt; int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; ret = ksmbd_vfs_get_compression(fp, &fmt); if (ret) return ret; file_info = (struct smb2_file_comp_info *)rsp->Buffer; file_info->CompressedFileSize = cpu_to_le64(min_t(u64, stat.blocks << 9, stat.size)); file_info->CompressionFormat = cpu_to_le16(fmt); file_info->CompressionUnitShift = 0; file_info->ChunkShift = 0; file_info->ClusterShift = 0; memset(&file_info->Reserved[0], 0, 3); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_comp_info)); return 0; } static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_attr_tag_info *file_info; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { pr_err("no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; file_info->FileAttributes = fp->f_ci->m_fattr; file_info->ReparseTag = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); return 0; } static int find_file_posix_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb311_posix_qinfo *file_info; struct inode *inode = file_inode(fp->filp); struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); struct kstat stat; u64 time; int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; int ret; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { pr_err("no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } ret = get_file_allocation_stat(fp, &stat); if (ret) return ret; file_info = (struct smb311_posix_qinfo *)rsp->Buffer; file_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); file_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); file_info->LastWriteTime = cpu_to_le64(time); file_info->ChangeTime = cpu_to_le64(fp->change_time); file_info->DosAttributes = fp->f_ci->m_fattr; file_info->Inode = cpu_to_le64(stat.ino); if (ksmbd_stream_fd(fp) == false) { file_info->EndOfFile = cpu_to_le64(stat.size); file_info->AllocationSize = cpu_to_le64(fp->allocation_size); } else { loff_t seof = ksmbd_stream_eof(fp); file_info->EndOfFile = cpu_to_le64((u64)seof); file_info->AllocationSize = cpu_to_le64((u64)seof); } file_info->HardLinks = cpu_to_le32(stat.nlink); file_info->Mode = cpu_to_le32(stat.mode & 0777); switch (stat.mode & S_IFMT) { case S_IFDIR: file_info->Mode |= cpu_to_le32(POSIX_TYPE_DIR << POSIX_FILETYPE_SHIFT); break; case S_IFLNK: file_info->Mode |= cpu_to_le32(POSIX_TYPE_SYMLINK << POSIX_FILETYPE_SHIFT); break; case S_IFCHR: file_info->Mode |= cpu_to_le32(POSIX_TYPE_CHARDEV << POSIX_FILETYPE_SHIFT); break; case S_IFBLK: file_info->Mode |= cpu_to_le32(POSIX_TYPE_BLKDEV << POSIX_FILETYPE_SHIFT); break; case S_IFIFO: file_info->Mode |= cpu_to_le32(POSIX_TYPE_FIFO << POSIX_FILETYPE_SHIFT); break; case S_IFSOCK: file_info->Mode |= cpu_to_le32(POSIX_TYPE_SOCKET << POSIX_FILETYPE_SHIFT); } file_info->DeviceId = cpu_to_le32(stat.rdev); /* * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + * sub_auth(4 * 1(num_subauth)) + RID(4). */ id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); rsp->OutputBufferLength = cpu_to_le32(out_buf_len); return 0; } static int smb2_get_info_file(struct ksmbd_work *work, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp) { struct ksmbd_file *fp; int fileinfoclass = 0; int rc = 0; unsigned int fixed_len; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { /* smb2 info file called for pipe */ rc = smb2_get_info_file_pipe(work->sess, req, rsp, work->response_buf); goto iov_pin_out; } if (work->next_smb2_rcv_hdr_off) { if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) return -ENOENT; fileinfoclass = req->FileInfoClass; switch (fileinfoclass) { case FILE_ACCESS_INFORMATION: get_file_access_info(rsp, fp, work->response_buf); break; case FILE_BASIC_INFORMATION: rc = get_file_basic_info(rsp, fp, work->response_buf); break; case FILE_STANDARD_INFORMATION: rc = get_file_standard_info(rsp, fp, work->response_buf); break; case FILE_ALIGNMENT_INFORMATION: get_file_alignment_info(rsp, work->response_buf); break; case FILE_ALL_INFORMATION: rc = get_file_all_info(work, rsp, fp, work->response_buf); break; case FILE_ALTERNATE_NAME_INFORMATION: get_file_alternate_info(work, rsp, fp, work->response_buf); break; case FILE_NORMALIZED_NAME_INFORMATION: rc = get_file_normalized_name_info(work, rsp, fp); break; case FILE_STREAM_INFORMATION: rc = get_file_stream_info(work, rsp, fp, work->response_buf); break; case FILE_INTERNAL_INFORMATION: rc = get_file_internal_info(rsp, fp, work->response_buf); break; case FILE_NETWORK_OPEN_INFORMATION: rc = get_file_network_open_info(rsp, fp, work->response_buf); break; case FILE_EA_INFORMATION: get_file_ea_info(rsp, work->response_buf); break; case FILE_FULL_EA_INFORMATION: rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); break; case FILE_POSITION_INFORMATION: get_file_position_info(rsp, fp, work->response_buf); break; case FILE_MODE_INFORMATION: get_file_mode_info(rsp, fp, work->response_buf); break; case FILE_COMPRESSION_INFORMATION: rc = get_file_compression_info(rsp, fp, work->response_buf); break; case FILE_ATTRIBUTE_TAG_INFORMATION: rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); break; case SMB_FIND_FILE_POSIX_INFO: if (!work->tcon->posix_extensions) { pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); rc = -EOPNOTSUPP; } else { rc = find_file_posix_info(rsp, fp, work->response_buf); } break; default: ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", fileinfoclass); rc = -EOPNOTSUPP; } if (!rc) { fixed_len = le32_to_cpu(rsp->OutputBufferLength); switch (fileinfoclass) { case FILE_ALL_INFORMATION: fixed_len = FILE_ALL_INFORMATION_SIZE; break; case FILE_ALTERNATE_NAME_INFORMATION: fixed_len = FILE_ALTERNATE_NAME_INFORMATION_SIZE; break; case FILE_STREAM_INFORMATION: fixed_len = FILE_STREAM_INFORMATION_SIZE; break; } rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), fixed_len, rsp, work->response_buf); } ksmbd_fd_put(work, fp); iov_pin_out: if (!rc) rc = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_query_info_rsp, Buffer) + le32_to_cpu(rsp->OutputBufferLength)); return rc; } static int smb2_get_info_filesystem(struct ksmbd_work *work, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp) { struct ksmbd_conn *conn = work->conn; struct ksmbd_share_config *share = work->tcon->share_conf; int fsinfoclass = 0; struct kstatfs stfs; struct path path; int rc = 0, len; unsigned int fixed_len = 0; if (!share->path) return -EIO; scoped_with_init_fs() rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); if (rc) { pr_err("cannot create vfs path\n"); return -EIO; } rc = vfs_statfs(&path, &stfs); if (rc) { pr_err("cannot do stat of path %s\n", share->path); path_put(&path); return -EIO; } fsinfoclass = req->FileInfoClass; switch (fsinfoclass) { case FS_DEVICE_INFORMATION: { FILE_SYSTEM_DEVICE_INFO *info; info = (FILE_SYSTEM_DEVICE_INFO *)rsp->Buffer; info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); info->DeviceCharacteristics = cpu_to_le32(FILE_DEVICE_IS_MOUNTED); if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) info->DeviceCharacteristics |= cpu_to_le32(FILE_READ_ONLY_DEVICE); rsp->OutputBufferLength = cpu_to_le32(8); fixed_len = 8; break; } case FS_ATTRIBUTE_INFORMATION: { FILE_SYSTEM_ATTRIBUTE_INFO *info; struct file_kattr fa = {}; size_t sz; u32 attrs; int err; info = (FILE_SYSTEM_ATTRIBUTE_INFO *)rsp->Buffer; attrs = FILE_SUPPORTS_OBJECT_IDS | FILE_PERSISTENT_ACLS | FILE_UNICODE_ON_DISK | FILE_FILE_COMPRESSION | FILE_SUPPORTS_SPARSE_FILES | FILE_SUPPORTS_BLOCK_REFCOUNTING; err = vfs_fileattr_get(path.dentry, &fa); /* * -EINVAL, -EOPNOTSUPP: ntfs-3g and other FUSE * filesystems that lack FS_IOC_FSGETXATTR support. */ if (err && err != -ENOIOCTLCMD && err != -ENOTTY && err != -EINVAL && err != -EOPNOTSUPP) { path_put(&path); return err; } if (!(fa.fsx_xflags & FS_XFLAG_CASEFOLD)) attrs |= FILE_CASE_SENSITIVE_SEARCH; if (!(fa.fsx_xflags & FS_XFLAG_CASENONPRESERVING)) attrs |= FILE_CASE_PRESERVED_NAMES; info->Attributes = cpu_to_le32(attrs); info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_STREAMS)) info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); /* * some application(potableapp) can not run on ksmbd share * because only NTFS handle security setting on windows. * So Although local fs(EXT4 or F2fs, etc) is not NTFS, * ksmbd should show share as NTFS. Later, If needed, we can add * fs type(s) parameter to change fs type user wanted. */ len = smbConvertToUTF16((__le16 *)info->FileSystemName, "NTFS", PATH_MAX, conn->local_nls, 0); len = len * 2; info->FileSystemNameLen = cpu_to_le32(len); sz = sizeof(FILE_SYSTEM_ATTRIBUTE_INFO) + len; rsp->OutputBufferLength = cpu_to_le32(sz); fixed_len = 16; break; } case FS_VOLUME_INFORMATION: { struct filesystem_vol_info *info; size_t sz; unsigned int serial_crc = 0; info = (struct filesystem_vol_info *)(rsp->Buffer); info->VolumeCreationTime = 0; serial_crc = crc32_le(serial_crc, share->name, strlen(share->name)); serial_crc = crc32_le(serial_crc, share->path, strlen(share->path)); serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), strlen(ksmbd_netbios_name())); /* Taking dummy value of serial number*/ info->VolumeSerialNumber = cpu_to_le32(serial_crc); len = smbConvertToUTF16((__le16 *)info->VolumeLabel, share->name, PATH_MAX, conn->local_nls, 0); len = len * 2; info->VolumeLabelLength = cpu_to_le32(len); info->Reserved = 0; info->SupportsObjects = 0; sz = sizeof(struct filesystem_vol_info) + len; rsp->OutputBufferLength = cpu_to_le32(sz); fixed_len = 24; break; } case FS_SIZE_INFORMATION: { FILE_SYSTEM_SIZE_INFO *info; info = (FILE_SYSTEM_SIZE_INFO *)(rsp->Buffer); info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); info->AvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); info->SectorsPerAllocationUnit = cpu_to_le32(1); info->BytesPerSector = cpu_to_le32(stfs.f_bsize); rsp->OutputBufferLength = cpu_to_le32(24); fixed_len = 24; break; } case FS_FULL_SIZE_INFORMATION: { struct smb2_fs_full_size_info *info; info = (struct smb2_fs_full_size_info *)(rsp->Buffer); info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); info->CallerAvailableAllocationUnits = cpu_to_le64(stfs.f_bavail); info->ActualAvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); info->SectorsPerAllocationUnit = cpu_to_le32(1); info->BytesPerSector = cpu_to_le32(stfs.f_bsize); rsp->OutputBufferLength = cpu_to_le32(32); fixed_len = 32; break; } case FS_OBJECT_ID_INFORMATION: { struct object_id_info *info; info = (struct object_id_info *)(rsp->Buffer); memset(info, 0, sizeof(*info)); if (path.mnt->mnt_sb->s_uuid_len == 16) memcpy(info->objid, path.mnt->mnt_sb->s_uuid.b, path.mnt->mnt_sb->s_uuid_len); else memcpy(info->objid, &stfs.f_fsid, sizeof(stfs.f_fsid)); info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); info->extended_info.version = cpu_to_le32(1); info->extended_info.release = cpu_to_le32(1); info->extended_info.rel_date = 0; memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); rsp->OutputBufferLength = cpu_to_le32(64); fixed_len = 64; break; } case FS_SECTOR_SIZE_INFORMATION: { struct smb3_fs_ss_info *info; unsigned int sector_size = min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); info = (struct smb3_fs_ss_info *)(rsp->Buffer); info->LogicalBytesPerSector = cpu_to_le32(sector_size); info->PhysicalBytesPerSectorForAtomicity = cpu_to_le32(sector_size); info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); info->FSEffPhysicalBytesPerSectorForAtomicity = cpu_to_le32(sector_size); info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE | SSINFO_FLAGS_TRIM_ENABLED); info->ByteOffsetForSectorAlignment = 0; info->ByteOffsetForPartitionAlignment = 0; rsp->OutputBufferLength = cpu_to_le32(28); fixed_len = 28; break; } case FS_CONTROL_INFORMATION: { /* * TODO : The current implementation is based on * test result with win7(NTFS) server. It's need to * modify this to get valid Quota values * from Linux kernel */ struct smb2_fs_control_info *info; info = (struct smb2_fs_control_info *)(rsp->Buffer); info->FreeSpaceStartFiltering = 0; info->FreeSpaceThreshold = 0; info->FreeSpaceStopFiltering = 0; info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); info->FileSystemControlFlags = 0; info->Padding = 0; rsp->OutputBufferLength = cpu_to_le32(48); fixed_len = 48; break; } case FS_POSIX_INFORMATION: { FILE_SYSTEM_POSIX_INFO *info; if (!work->tcon->posix_extensions) { pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); path_put(&path); return -EOPNOTSUPP; } else { info = (FILE_SYSTEM_POSIX_INFO *)(rsp->Buffer); info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); info->BlockSize = cpu_to_le32(stfs.f_bsize); info->TotalBlocks = cpu_to_le64(stfs.f_blocks); info->BlocksAvail = cpu_to_le64(stfs.f_bfree); info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); info->TotalFileNodes = cpu_to_le64(stfs.f_files); info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); info->FileSysIdentifier = cpu_to_le64((u64)(u32)stfs.f_fsid.val[1] << 32 | (u32)stfs.f_fsid.val[0]); rsp->OutputBufferLength = cpu_to_le32(56); fixed_len = 56; } break; } default: path_put(&path); return -EOPNOTSUPP; } rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), fixed_len, rsp, work->response_buf); path_put(&path); if (!rc) rc = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_query_info_rsp, Buffer) + le32_to_cpu(rsp->OutputBufferLength)); return rc; } static int smb2_get_info_sec(struct ksmbd_work *work, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp) { struct ksmbd_file *fp; struct mnt_idmap *idmap; struct smb_ntsd *pntsd = NULL, *ppntsd = NULL; struct smb_fattr fattr = {{0}}; struct inode *inode; __u32 secdesclen = 0; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; int addition_info = le32_to_cpu(req->AdditionalInformation); int rc = 0, ppntsd_size = 0, max_len; size_t scratch_len = 0; if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | PROTECTED_DACL_SECINFO | UNPROTECTED_DACL_SECINFO)) { ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", addition_info); rsp->hdr.Status = STATUS_NOT_SUPPORTED; return -EINVAL; } if (work->next_smb2_rcv_hdr_off) { if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) return -ENOENT; if (addition_info & (OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO) && !(fp->daccess & FILE_READ_CONTROL_LE)) { ksmbd_fd_put(work, fp); return -EACCES; } if (le32_to_cpu(req->OutputBufferLength) < sizeof(struct smb_ntsd)) { rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; ksmbd_fd_put(work, fp); return -ENOSPC; } idmap = file_mnt_idmap(fp->filp); inode = file_inode(fp->filp); ksmbd_acls_fattr(&fattr, idmap, inode); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_ACL_XATTR)) ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, fp->filp->f_path.dentry, &ppntsd); /* Check if sd buffer size exceeds response buffer size */ max_len = smb2_calc_max_out_buf_len(work, offsetof(struct smb2_query_info_rsp, Buffer), le32_to_cpu(req->OutputBufferLength)); if (max_len < 0) { rc = -EINVAL; goto release_acl; } scratch_len = smb_acl_sec_desc_scratch_len(&fattr, ppntsd, ppntsd_size, addition_info); if (!scratch_len || scratch_len == SIZE_MAX) { rc = -EFBIG; goto release_acl; } pntsd = kvzalloc(scratch_len, KSMBD_DEFAULT_GFP); if (!pntsd) { rc = -ENOMEM; goto release_acl; } rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, addition_info, &secdesclen, &fattr); release_acl: posix_acl_release(fattr.cf_acls); posix_acl_release(fattr.cf_dacls); kfree(ppntsd); ksmbd_fd_put(work, fp); if (!rc && ALIGN(secdesclen, 8) > scratch_len) rc = -EFBIG; if (rc) goto err_out; rsp->OutputBufferLength = cpu_to_le32(secdesclen); rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), le32_to_cpu(rsp->OutputBufferLength), rsp, work->response_buf); if (rc) goto err_out; rc = ksmbd_iov_pin_rsp_read(work, (void *)rsp, offsetof(struct smb2_query_info_rsp, Buffer), pntsd, secdesclen); err_out: if (rc) { rsp->OutputBufferLength = 0; kvfree(pntsd); } return rc; } /** * smb2_query_info() - handler for smb2 query info command * @work: smb work containing query info request buffer * * Return: 0 on success, otherwise error */ int smb2_query_info(struct ksmbd_work *work) { struct smb2_query_info_req *req; struct smb2_query_info_rsp *rsp; int rc = 0; ksmbd_debug(SMB, "Received request smb2 query info request\n"); WORK_BUFFERS(work, req, rsp); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (ksmbd_override_fsids(work)) { rc = -ENOMEM; goto err_out; } rsp->StructureSize = cpu_to_le16(9); rsp->OutputBufferOffset = cpu_to_le16(72); switch (req->InfoType) { case SMB2_O_INFO_FILE: ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); rc = smb2_get_info_file(work, req, rsp); break; case SMB2_O_INFO_FILESYSTEM: ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); rc = smb2_get_info_filesystem(work, req, rsp); break; case SMB2_O_INFO_SECURITY: ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); rc = smb2_get_info_sec(work, req, rsp); break; default: ksmbd_debug(SMB, "InfoType %d not supported yet\n", req->InfoType); rc = -EOPNOTSUPP; } ksmbd_revert_fsids(work); err_out: if (rc < 0) { if (rc == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (rc == -EIO) rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; else if (rc == -ENOMEM) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; else if (rc == -EINVAL && rsp->hdr.Status == 0) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rsp->hdr.Status == 0) rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; smb2_set_err_rsp(work); ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); return rc; } return 0; } /** * smb2_close_pipe() - handler for closing IPC pipe * @work: smb work containing close request buffer * * Return: 0 */ static noinline int smb2_close_pipe(struct ksmbd_work *work) { u64 id; struct smb2_close_req *req; struct smb2_close_rsp *rsp; WORK_BUFFERS(work, req, rsp); id = req->VolatileFileId; ksmbd_session_rpc_close(work->sess, id); rsp->StructureSize = cpu_to_le16(60); rsp->Flags = 0; rsp->Reserved = 0; rsp->CreationTime = 0; rsp->LastAccessTime = 0; rsp->LastWriteTime = 0; rsp->ChangeTime = 0; rsp->AllocationSize = 0; rsp->EndOfFile = 0; rsp->Attributes = 0; return ksmbd_iov_pin_rsp(work, (void *)rsp, sizeof(struct smb2_close_rsp)); } /** * smb2_close() - handler for smb2 close file command * @work: smb work containing close request buffer * * Return: 0 on success, otherwise error */ int smb2_close(struct ksmbd_work *work) { u64 volatile_id = KSMBD_NO_FID; u64 sess_id; struct smb2_close_req *req; struct smb2_close_rsp *rsp; struct ksmbd_file *fp; u64 time; int err = 0; ksmbd_debug(SMB, "Received smb2 close request\n"); WORK_BUFFERS(work, req, rsp); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe close request\n"); return smb2_close_pipe(work); } sess_id = le64_to_cpu(req->hdr.SessionId); if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) sess_id = work->compound_sid; work->compound_sid = 0; if (work->sess && work->sess->id == sess_id) { work->compound_sid = sess_id; } else { rsp->hdr.Status = STATUS_USER_SESSION_DELETED; if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) rsp->hdr.Status = STATUS_INVALID_PARAMETER; err = -EBADF; goto out; } if (work->next_smb2_rcv_hdr_off && !has_file_id(req->VolatileFileId)) { if (!has_file_id(work->compound_fid)) { /* file already closed, return FILE_CLOSED */ ksmbd_debug(SMB, "file already closed\n"); rsp->hdr.Status = STATUS_FILE_CLOSED; err = -EBADF; goto out; } else { ksmbd_debug(SMB, "Compound request set FID = %llu:%llu\n", work->compound_fid, work->compound_pfid); volatile_id = work->compound_fid; /* file closed, stored id is not valid anymore */ work->compound_fid = KSMBD_NO_FID; work->compound_pfid = KSMBD_NO_FID; } } else { volatile_id = req->VolatileFileId; } ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); rsp->StructureSize = cpu_to_le16(60); rsp->Reserved = 0; if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { struct kstat stat; int ret; fp = ksmbd_lookup_fd_fast(work, volatile_id); if (!fp) { err = -ENOENT; goto out; } ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) { ksmbd_fd_put(work, fp); goto out; } rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; rsp->AllocationSize = cpu_to_le64(fp->allocation_size); rsp->EndOfFile = cpu_to_le64(stat.size); rsp->Attributes = fp->f_ci->m_fattr; rsp->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); rsp->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); if (time > fp->open_mtime && time - fp->open_mtime < KSMBD_WRITE_TIME_RESOLUTION) time = fp->open_mtime; rsp->LastWriteTime = cpu_to_le64(time); rsp->ChangeTime = cpu_to_le64(fp->change_time); ksmbd_fd_put(work, fp); } else { rsp->Flags = 0; rsp->AllocationSize = 0; rsp->EndOfFile = 0; rsp->Attributes = 0; rsp->CreationTime = 0; rsp->LastAccessTime = 0; rsp->LastWriteTime = 0; rsp->ChangeTime = 0; } err = ksmbd_close_fd(work, volatile_id); out: if (!err) err = ksmbd_iov_pin_rsp(work, (void *)rsp, sizeof(struct smb2_close_rsp)); if (err) { if (rsp->hdr.Status == 0) rsp->hdr.Status = STATUS_FILE_CLOSED; smb2_set_err_rsp(work); } return err; } /** * smb2_echo() - handler for smb2 echo(ping) command * @work: smb work containing echo request buffer * * Return: 0 on success, otherwise error */ int smb2_echo(struct ksmbd_work *work) { struct smb2_echo_rsp *rsp = smb_get_msg(work->response_buf); ksmbd_debug(SMB, "Received smb2 echo request\n"); if (work->next_smb2_rcv_hdr_off) rsp = ksmbd_resp_buf_next(work); rsp->StructureSize = cpu_to_le16(4); rsp->Reserved = 0; return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); } static int smb2_rename(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_rename_info *file_info, struct nls_table *local_nls) { struct ksmbd_share_config *share = fp->tcon->share_conf; char *new_name = NULL; int rc, flags = 0; ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); new_name = smb2_get_name(file_info->FileName, le32_to_cpu(file_info->FileNameLength), local_nls); if (IS_ERR(new_name)) return PTR_ERR(new_name); if (fp->is_posix_ctxt == false && strchr(new_name, ':')) { int s_type; char *xattr_stream_name, *stream_name = NULL; size_t xattr_stream_size; int len; rc = parse_stream_name(new_name, &stream_name, &s_type); if (rc < 0) goto out; len = strlen(new_name); if (len > 0 && new_name[len - 1] != '/') { pr_err("not allow base filename in rename\n"); rc = -ESHARE; goto out; } rc = ksmbd_vfs_xattr_stream_name(stream_name, &xattr_stream_name, &xattr_stream_size, s_type); if (rc) goto out; rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), &fp->filp->f_path, xattr_stream_name, NULL, 0, 0, true); if (rc < 0) { pr_err("failed to store stream name in xattr: %d\n", rc); rc = -EINVAL; } kfree(xattr_stream_name); goto out; } ksmbd_debug(SMB, "new name %s\n", new_name); if (ksmbd_share_veto_filename(share, new_name)) { rc = -ENOENT; ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); goto out; } if (!file_info->ReplaceIfExists) flags = RENAME_NOREPLACE; rc = ksmbd_vfs_check_rename_share(work, &fp->filp->f_path); if (rc) goto out; smb_break_all_levII_oplock_rename(work, fp); rc = ksmbd_vfs_rename(work, fp, new_name, flags); out: kfree(new_name); return rc; } static int smb2_create_link(struct ksmbd_work *work, struct ksmbd_share_config *share, struct smb2_file_link_info *file_info, unsigned int buf_len, struct file *filp, struct nls_table *local_nls) { char *link_name = NULL, *target_name = NULL, *pathname = NULL; struct path path; int rc; if (buf_len < (u64)sizeof(struct smb2_file_link_info) + le32_to_cpu(file_info->FileNameLength)) return -EINVAL; ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); pathname = kmalloc(PATH_MAX, KSMBD_DEFAULT_GFP); if (!pathname) return -ENOMEM; link_name = smb2_get_name(file_info->FileName, le32_to_cpu(file_info->FileNameLength), local_nls); if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { rc = -EINVAL; goto out; } ksmbd_debug(SMB, "link name is %s\n", link_name); target_name = file_path(filp, pathname, PATH_MAX); if (IS_ERR(target_name)) { rc = -EINVAL; goto out; } ksmbd_debug(SMB, "target name is %s\n", target_name); rc = ksmbd_vfs_kern_path_start_removing(work, link_name, LOOKUP_NO_SYMLINKS, &path, 0); if (rc) { if (rc != -ENOENT) goto out; } else { if (file_info->ReplaceIfExists) { rc = ksmbd_vfs_remove_file(work, &path); if (rc) { rc = -EINVAL; ksmbd_debug(SMB, "cannot delete %s\n", link_name); } } else { rc = -EEXIST; ksmbd_debug(SMB, "link already exists\n"); } ksmbd_vfs_kern_path_end_removing(&path); if (rc) goto out; } rc = ksmbd_vfs_link(work, target_name, link_name); if (rc) rc = -EINVAL; out: if (!IS_ERR(link_name)) kfree(link_name); kfree(pathname); return rc; } static int set_file_basic_info(struct ksmbd_file *fp, struct file_basic_info *file_info, struct ksmbd_share_config *share) { struct iattr attrs; struct file *filp; struct inode *inode; struct mnt_idmap *idmap; __le32 attrs_mask = FILE_ATTRIBUTE_DIRECTORY_LE | FILE_ATTRIBUTE_COMPRESSED_LE; int rc = 0; if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) return -EACCES; attrs.ia_valid = 0; filp = fp->filp; inode = file_inode(filp); idmap = file_mnt_idmap(filp); if (file_info->CreationTime) fp->create_time = le64_to_cpu(file_info->CreationTime); if (file_info->LastAccessTime) { attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); } if (file_info->ChangeTime) { fp->change_time = le64_to_cpu(file_info->ChangeTime); inode_set_ctime_to_ts(inode, ksmbd_NTtimeToUnix(file_info->ChangeTime)); } if (file_info->LastWriteTime) { attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET | ATTR_CTIME); } if (file_info->Attributes) { if (!S_ISDIR(inode->i_mode) && file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { pr_err("can't change a file to a directory\n"); return -EINVAL; } if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) fp->f_ci->m_fattr = (file_info->Attributes & ~FILE_ATTRIBUTE_COMPRESSED_LE) | (fp->f_ci->m_fattr & attrs_mask); } if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && (file_info->CreationTime || file_info->Attributes)) { struct xattr_dos_attrib da = {0}; da.version = 4; da.itime = fp->itime; da.create_time = fp->create_time; da.attr = le32_to_cpu(fp->f_ci->m_fattr); da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | XATTR_DOSINFO_ITIME; rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, true); if (rc) ksmbd_debug(SMB, "failed to restore file attribute in EA\n"); rc = 0; } if (attrs.ia_valid) { struct dentry *dentry = filp->f_path.dentry; struct inode *inode = d_inode(dentry); if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) return -EACCES; inode_lock(inode); rc = notify_change(idmap, dentry, &attrs, NULL); inode_unlock(inode); } return rc; } static int set_file_allocation_info(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_alloc_info *file_alloc_info) { /* * TODO : It's working fine only when store dos attributes * is not yes. need to implement a logic which works * properly with any smb.conf option */ loff_t alloc_blks; u64 alloc_size; struct inode *inode; struct kstat stat; int rc; if (!(fp->daccess & FILE_WRITE_DATA_LE)) return -EACCES; if (ksmbd_stream_fd(fp) == true) return 0; rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (rc) return rc; /* * AllocationSize is fully client-controlled (the caller only * validates the fixed 8-byte buffer length). Reject values that * would overflow the "round up to 512-byte blocks" conversion * below instead of silently wrapping it to a tiny block count, * which would truncate the file to a size the client never * asked for. */ alloc_size = le64_to_cpu(file_alloc_info->AllocationSize); if (alloc_size > MAX_LFS_FILESIZE - 511) return -EINVAL; alloc_blks = (alloc_size + 511) >> 9; inode = file_inode(fp->filp); if (alloc_blks > stat.blocks) { smb_break_all_levII_oplock(work, fp, 1); rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, alloc_blks * 512); if (rc && rc != -EOPNOTSUPP) { pr_err("vfs_fallocate is failed : %d\n", rc); return rc; } } else if (alloc_blks < stat.blocks) { loff_t size; /* * Allocation size could be smaller than original one * which means allocated blocks in file should be * deallocated. use truncate to cut out it, but inode * size is also updated with truncate offset. * inode size is retained by backup inode size. */ size = i_size_read(inode); rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); if (rc) { pr_err("truncate failed!, err %d\n", rc); return rc; } if (size < alloc_blks * 512) i_size_write(inode, size); } fp->allocation_size = le64_to_cpu(file_alloc_info->AllocationSize); fp->allocation_size_set = true; return 0; } static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_eof_info *file_eof_info) { loff_t newsize; struct inode *inode; int rc; if (!(fp->daccess & FILE_WRITE_DATA_LE)) return -EACCES; newsize = le64_to_cpu(file_eof_info->EndOfFile); inode = file_inode(fp->filp); /* * If FILE_END_OF_FILE_INFORMATION of set_info_file is called * on FAT32 shared device, truncate execution time is too long * and network error could cause from windows client. because * truncate of some filesystem like FAT32 fill zero data in * truncated range. */ if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC && ksmbd_stream_fd(fp) == false) { ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); rc = ksmbd_vfs_truncate(work, fp, newsize); if (rc) { ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); if (rc != -EAGAIN) rc = -EBADF; return rc; } } return 0; } static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_rename_info *rename_info, unsigned int buf_len) { if (!(fp->daccess & FILE_DELETE_LE)) { pr_err("no right to delete : 0x%x\n", fp->daccess); return -EACCES; } if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + le32_to_cpu(rename_info->FileNameLength)) return -EINVAL; if (!le32_to_cpu(rename_info->FileNameLength)) return -EINVAL; return smb2_rename(work, fp, rename_info, work->conn->local_nls); } static int set_file_disposition_info(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_disposition_info *file_info) { struct inode *inode; if (!(fp->daccess & FILE_DELETE_LE)) { pr_err("no right to delete : 0x%x\n", fp->daccess); return -EACCES; } if (fp->f_ci->m_fattr & FILE_ATTRIBUTE_READONLY_LE) return -EACCES; inode = file_inode(fp->filp); if (file_info->DeletePending) { if (ksmbd_has_stream_without_delete_share(fp)) return -ESHARE; if (S_ISDIR(inode->i_mode) && !ksmbd_stream_fd(fp) && ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) return -EBUSY; smb_break_all_levII_oplock_for_delete(work, fp); ksmbd_fd_set_delete_pending(fp); } else { ksmbd_fd_clear_delete_pending(fp); } return 0; } static int set_file_position_info(struct ksmbd_file *fp, struct smb2_file_pos_info *file_info) { loff_t current_byte_offset; unsigned long sector_size; struct inode *inode; inode = file_inode(fp->filp); current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); sector_size = inode->i_sb->s_blocksize; if (current_byte_offset < 0 || (fp->coption & FILE_NO_INTERMEDIATE_BUFFERING_LE && current_byte_offset & (sector_size - 1))) { pr_err("CurrentByteOffset is not valid : %llu\n", current_byte_offset); return -EINVAL; } if (ksmbd_stream_fd(fp) == false) fp->filp->f_pos = current_byte_offset; else { if (current_byte_offset > XATTR_SIZE_MAX) current_byte_offset = XATTR_SIZE_MAX; fp->stream.pos = current_byte_offset; } return 0; } static int set_file_mode_info(struct ksmbd_file *fp, struct smb2_file_mode_info *file_info) { __le32 mode; mode = file_info->Mode; if ((mode & ~FILE_MODE_INFO_MASK)) { pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); return -EINVAL; } /* * TODO : need to implement consideration for * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT */ ksmbd_vfs_set_fadvise(fp->filp, mode); fp->coption = mode; return 0; } /** * smb2_set_info_file() - handler for smb2 set info command * @work: smb work containing set info command buffer * @fp: ksmbd_file pointer * @req: request buffer pointer * @share: ksmbd_share_config pointer * * Return: 0 on success, otherwise error */ static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_set_info_req *req, struct ksmbd_share_config *share) { unsigned int buf_len = le32_to_cpu(req->BufferLength); char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); switch (req->FileInfoClass) { case FILE_BASIC_INFORMATION: { if (buf_len < sizeof(struct file_basic_info)) return -EMSGSIZE; return set_file_basic_info(fp, (struct file_basic_info *)buffer, share); } case FILE_ALLOCATION_INFORMATION: { if (buf_len < sizeof(struct smb2_file_alloc_info)) return -EMSGSIZE; return set_file_allocation_info(work, fp, (struct smb2_file_alloc_info *)buffer); } case FILE_END_OF_FILE_INFORMATION: { if (buf_len < sizeof(struct smb2_file_eof_info)) return -EMSGSIZE; return set_end_of_file_info(work, fp, (struct smb2_file_eof_info *)buffer); } case FILE_RENAME_INFORMATION: { if (buf_len < sizeof(struct smb2_file_rename_info)) return -EMSGSIZE; return set_rename_info(work, fp, (struct smb2_file_rename_info *)buffer, buf_len); } case FILE_LINK_INFORMATION: { struct smb2_file_link_info *file_info; if (buf_len < sizeof(struct smb2_file_link_info)) return -EMSGSIZE; file_info = (struct smb2_file_link_info *)buffer; if (file_info->ReplaceIfExists && !(fp->daccess & FILE_DELETE_LE)) { pr_err("no right to delete : 0x%x\n", fp->daccess); return -EACCES; } return smb2_create_link(work, work->tcon->share_conf, file_info, buf_len, fp->filp, work->conn->local_nls); } case FILE_DISPOSITION_INFORMATION: { if (buf_len < sizeof(struct smb2_file_disposition_info)) return -EMSGSIZE; return set_file_disposition_info(work, fp, (struct smb2_file_disposition_info *)buffer); } case FILE_FULL_EA_INFORMATION: { if (!(fp->daccess & FILE_WRITE_EA_LE)) { pr_err("Not permitted to write ext attr: 0x%x\n", fp->daccess); return -EACCES; } if (buf_len < sizeof(struct smb2_ea_info)) return -EMSGSIZE; return smb2_set_ea((struct smb2_ea_info *)buffer, buf_len, &fp->filp->f_path, true); } case FILE_POSITION_INFORMATION: { if (buf_len < sizeof(struct smb2_file_pos_info)) return -EMSGSIZE; return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); } case FILE_MODE_INFORMATION: { if (buf_len < sizeof(struct smb2_file_mode_info)) return -EMSGSIZE; return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); } } pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); return -EOPNOTSUPP; } static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, char *buffer, int buf_len) { struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; fp->saccess |= FILE_SHARE_DELETE_LE; if (!(fp->daccess & (FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE))) return -EACCES; return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, buf_len, false, true); } /** * smb2_set_info() - handler for smb2 set info command handler * @work: smb work containing set info request buffer * * Return: 0 on success, otherwise error */ int smb2_set_info(struct ksmbd_work *work) { const struct cred *saved_cred; struct smb2_set_info_req *req; struct smb2_set_info_rsp *rsp; struct ksmbd_file *fp = NULL; int rc = 0; bool chseq_err = false; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; ksmbd_debug(SMB, "Received smb2 set info request\n"); if (work->next_smb2_rcv_hdr_off) { req = ksmbd_req_buf_next(work); rsp = ksmbd_resp_buf_next(work); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } else { req = smb_get_msg(work->request_buf); rsp = smb_get_msg(work->response_buf); } if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); pr_err("User does not have write permission\n"); rc = -EACCES; goto err_out; } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) { ksmbd_debug(SMB, "Invalid id for close: %u\n", id); rc = -ENOENT; goto err_out; } rc = smb2_set_request_open(work, fp, &req->hdr, true, false); if (rc) { rsp->hdr.Status = STATUS_FILE_NOT_AVAILABLE; chseq_err = true; goto err_out; } saved_cred = override_creds(fp->filp->f_cred); switch (req->InfoType) { case SMB2_O_INFO_FILE: ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); break; case SMB2_O_INFO_SECURITY: ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); rc = smb2_set_info_sec(fp, le32_to_cpu(req->AdditionalInformation), (char *)req + le16_to_cpu(req->BufferOffset), le32_to_cpu(req->BufferLength)); break; default: rc = -EOPNOTSUPP; } revert_creds(saved_cred); if (rc < 0) goto err_out; rsp->StructureSize = cpu_to_le16(2); rc = ksmbd_iov_pin_rsp(work, (void *)rsp, sizeof(struct smb2_set_info_rsp)); if (rc) goto err_out; ksmbd_fd_put(work, fp); return 0; err_out: if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) { if (fp && req->InfoType == SMB2_O_INFO_FILE && req->FileInfoClass == FILE_DISPOSITION_INFORMATION && fp->f_ci->m_fattr & FILE_ATTRIBUTE_READONLY_LE) rsp->hdr.Status = STATUS_CANNOT_DELETE; else rsp->hdr.Status = STATUS_ACCESS_DENIED; } else if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -EMSGSIZE) rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; else if (rc == -ENOSPC || rc == -EFBIG) rsp->hdr.Status = STATUS_DISK_FULL; else if (rc == -ESHARE) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; else if (rc == -EBUSY || rc == -ENOTEMPTY) rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; else if (rc == -EAGAIN && !chseq_err) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (rc == -EBADF || rc == -ESTALE) rsp->hdr.Status = STATUS_INVALID_HANDLE; else if (rc == -EEXIST) rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); return rc; } /** * smb2_read_pipe() - handler for smb2 read from IPC pipe * @work: smb work containing read IPC pipe command buffer * * Return: 0 on success, otherwise error */ static noinline int smb2_read_pipe(struct ksmbd_work *work) { int nbytes = 0, err; u64 id; struct ksmbd_rpc_command *rpc_resp; struct smb2_read_req *req; struct smb2_read_rsp *rsp; WORK_BUFFERS(work, req, rsp); id = req->VolatileFileId; rpc_resp = ksmbd_rpc_read(work->sess, id); if (rpc_resp) { void *aux_payload_buf; if (rpc_resp->flags != KSMBD_RPC_OK) { err = -EINVAL; goto out; } aux_payload_buf = kvmalloc(ALIGN(rpc_resp->payload_sz, 8), KSMBD_DEFAULT_GFP); if (!aux_payload_buf) { err = -ENOMEM; goto out; } memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); if (rpc_resp->payload_sz & 7) memset(aux_payload_buf + rpc_resp->payload_sz, 0, ALIGN(rpc_resp->payload_sz, 8) - rpc_resp->payload_sz); nbytes = rpc_resp->payload_sz; err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, offsetof(struct smb2_read_rsp, Buffer), aux_payload_buf, nbytes); if (err) { kvfree(aux_payload_buf); goto out; } kvfree(rpc_resp); } else { err = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_read_rsp, Buffer)); if (err) goto out; } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 80; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(nbytes); rsp->DataRemaining = 0; rsp->Flags = 0; return 0; out: rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; smb2_set_err_rsp(work); kvfree(rpc_resp); return err; } /** * smb2_set_rdma_key() - validate descriptors and save invalidation state * @work: request work item * @desc: first RDMA buffer descriptor * @Channel: nested RDMA channel type * @channel_info_len: descriptor array length * * Return: 0 on success, otherwise -EINVAL */ static int smb2_set_rdma_key(struct ksmbd_work *work, struct smbdirect_buffer_descriptor_v1 *desc, __le32 Channel, __le16 channel_info_len) { unsigned int i, ch_count; if (Channel != SMB2_CHANNEL_RDMA_V1 && Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) return -EINVAL; if (work->conn->dialect == SMB30_PROT_ID && Channel != SMB2_CHANNEL_RDMA_V1) return -EINVAL; if (le16_to_cpu(channel_info_len) % sizeof(*desc)) return -EINVAL; ch_count = le16_to_cpu(channel_info_len) / sizeof(*desc); if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { for (i = 0; i < ch_count; i++) { pr_info("RDMA r/w request %#x: token %#x, length %#x\n", i, le32_to_cpu(desc[i].token), le32_to_cpu(desc[i].length)); } } if (!ch_count) return -EINVAL; work->need_invalidate_rkey = (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) work->remote_key = le32_to_cpu(desc->token); return 0; } /** * smb2_prep_rdma_read() - transform an RDMA READ payload * @work: request work item * @req: READ request controlling encryption or signing * @rsp: READ response receiving transform metadata * @data: data that will be transferred through RDMA * @datalen: data length * * Encrypt the payload in place and encode the detached crypto metadata in * the response buffer. * * Return: metadata length, zero when no transform applies, or negative errno */ static int smb2_prep_rdma_read(struct ksmbd_work *work, struct smb2_read_req *req, struct smb2_read_rsp *rsp, void *data, unsigned int datalen) { struct ksmbd_conn *conn = work->conn; struct smb2_rdma_transform *transform; struct smb2_rdma_crypto_transform *crypto; u8 *nonce; unsigned int nonce_len = 0, transform_len; u16 transform_type; int err; if (!work->encrypted || !(conn->rdma_transform_ids & BIT(SMB2_RDMA_TRANSFORM_ENCRYPTION))) return 0; transform_type = SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION; nonce_len = (conn->cipher_type == SMB2_ENCRYPTION_AES128_GCM || conn->cipher_type == SMB2_ENCRYPTION_AES256_GCM) ? SMB3_AES_GCM_NONCE : SMB3_AES_CCM_NONCE; transform = (struct smb2_rdma_transform *)rsp->Buffer; crypto = (struct smb2_rdma_crypto_transform *)(transform + 1); memset(transform, 0, sizeof(*transform) + sizeof(*crypto) + SMB2_SIGNATURE_SIZE + nonce_len); transform->Channel = SMB2_CHANNEL_NONE; transform->TransformCount = cpu_to_le16(1); crypto->TransformType = cpu_to_le16(transform_type); crypto->SignatureLength = cpu_to_le16(SMB2_SIGNATURE_SIZE); crypto->NonceLength = cpu_to_le16(nonce_len); nonce = crypto->Signature + SMB2_SIGNATURE_SIZE; get_random_bytes(nonce, nonce_len); err = ksmbd_crypt_rdma(conn, work->sess->smb3encryptionkey, data, datalen, nonce, nonce_len, crypto->Signature, SMB2_SIGNATURE_SIZE, true); if (err) { pr_err("RDMA READ encryption failed: session=%llu payload=%u rc=%d\n", work->sess->id, datalen, err); return err; } transform_len = sizeof(*transform) + sizeof(*crypto) + SMB2_SIGNATURE_SIZE + nonce_len; rsp->Flags = SMB2_READFLAG_RESPONSE_RDMA_TRANSFORM; rsp->DataLength = cpu_to_le32(transform_len); ksmbd_debug(RDMA, "RDMA READ encryption prepared: session=%llu cipher=0x%04x payload=%u transform=%u nonce=%u tag=%u\n", work->sess->id, le16_to_cpu(conn->cipher_type), datalen, transform_len, nonce_len, SMB2_SIGNATURE_SIZE); return transform_len; } struct smb2_rdma_write_transform { struct smbdirect_buffer_descriptor_v1 *desc; struct smb2_rdma_crypto_transform *crypto; u8 *nonce; unsigned int desc_len; unsigned int nonce_len; unsigned int signature_len; u16 type; __le32 channel; }; /** * smb2_current_req_len() - return the current compound request element size * @work: request work item * @hdr: current SMB2 header * * Return: current request element length measured from the SMB2 header */ static unsigned int smb2_current_req_len(struct ksmbd_work *work, struct smb2_hdr *hdr) { if (hdr->NextCommand) return le32_to_cpu(hdr->NextCommand); return get_rfc1002_len(work->request_buf) - work->next_smb2_rcv_hdr_off; } /** * check_rdma_desc() - validate an RDMA descriptor array * @desc: descriptor array * @desc_len: descriptor array length * @required_len: minimum aggregate buffer length * * Return: 0 when the descriptors cover the transfer, otherwise -EINVAL */ static int check_rdma_desc(struct smbdirect_buffer_descriptor_v1 *desc, unsigned int desc_len, unsigned int required_len) { unsigned int i, count; u64 described_len = 0; if (!desc_len || desc_len % sizeof(*desc)) return -EINVAL; count = desc_len / sizeof(*desc); if (!le32_to_cpu(desc[0].length)) return -EINVAL; for (i = 0; i < count; i++) described_len += le32_to_cpu(desc[i].length); return described_len < required_len ? -EINVAL : 0; } /** * smb2_parse_rdma_write_transform() - validate RDMA WRITE transform metadata * @work: request work item * @req: WRITE request containing the transform * @info: parsed transform information * * Validate transform counts, crypto fields, descriptor alignment and bounds, * negotiated algorithms, and the nested RDMA channel. * * Return: 0 on success, otherwise a negative errno */ static int smb2_parse_rdma_write_transform(struct ksmbd_work *work, struct smb2_write_req *req, struct smb2_rdma_write_transform *info) { struct smb2_rdma_transform *transform; struct smb2_rdma_crypto_transform *crypto; unsigned int req_len = smb2_current_req_len(work, &req->hdr); unsigned int offset = le16_to_cpu(req->WriteChannelInfoOffset); unsigned int length = le16_to_cpu(req->WriteChannelInfoLength); unsigned int desc_offset, desc_len, crypto_len, expected_desc_offset; int err; if (!work->conn->rdma_transform_ids || offset < offsetof(struct smb2_write_req, Buffer) || length < sizeof(*transform) || offset > req_len || length > req_len - offset) return -EINVAL; transform = (struct smb2_rdma_transform *)((char *)req + offset); if (le16_to_cpu(transform->TransformCount) != 1 || (transform->Channel != SMB2_CHANNEL_RDMA_V1 && transform->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE)) return -EINVAL; desc_offset = le16_to_cpu(transform->RdmaDescriptorOffset); desc_len = le16_to_cpu(transform->RdmaDescriptorLength); if (!desc_len || desc_len % sizeof(*info->desc) || desc_offset < sizeof(*transform) || desc_offset > length || desc_len > length - desc_offset) return -EINVAL; crypto = (struct smb2_rdma_crypto_transform *)(transform + 1); if (length - sizeof(*transform) < sizeof(*crypto)) return -EINVAL; info->type = le16_to_cpu(crypto->TransformType); info->signature_len = le16_to_cpu(crypto->SignatureLength); info->nonce_len = le16_to_cpu(crypto->NonceLength); if (!info->signature_len) return info->type == SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION ? -EBADMSG : -EINVAL; if (info->signature_len > SMB2_SIGNATURE_SIZE) return info->type == SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION ? -EBADMSG : -EINVAL; if (info->signature_len > length - sizeof(*transform) - sizeof(*crypto) || info->nonce_len > length - sizeof(*transform) - sizeof(*crypto) - info->signature_len) return -EINVAL; crypto_len = sizeof(*crypto) + info->signature_len + info->nonce_len; expected_desc_offset = ALIGN(sizeof(*transform) + crypto_len, 8); if (desc_offset != expected_desc_offset) return -EINVAL; if (info->type == SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION) { unsigned int expected_nonce_len; if (!(work->conn->rdma_transform_ids & BIT(SMB2_RDMA_TRANSFORM_ENCRYPTION)) || !work->encrypted) return -EINVAL; expected_nonce_len = (work->conn->cipher_type == SMB2_ENCRYPTION_AES128_GCM || work->conn->cipher_type == SMB2_ENCRYPTION_AES256_GCM) ? SMB3_AES_GCM_NONCE : SMB3_AES_CCM_NONCE; if (info->nonce_len != expected_nonce_len) return -EBADMSG; } else { return -EINVAL; } info->desc = (struct smbdirect_buffer_descriptor_v1 *) ((char *)transform + desc_offset); info->desc_len = desc_len; info->crypto = crypto; info->nonce = crypto->Signature + info->signature_len; info->channel = transform->Channel; err = check_rdma_desc(info->desc, info->desc_len, le32_to_cpu(req->RemainingBytes)); if (err) return err; ksmbd_debug(RDMA, "RDMA WRITE encryption metadata: session=%llu cipher=0x%04x payload=%u channel=0x%x descriptors=%zu nonce=%u tag=%u\n", work->sess->id, le16_to_cpu(work->conn->cipher_type), le32_to_cpu(req->RemainingBytes), le32_to_cpu(info->channel), info->desc_len / sizeof(*info->desc), info->nonce_len, info->signature_len); return 0; } /** * smb2_read_rdma() - transfer READ data to client RDMA buffers * @work: request work item * @req: READ request containing client descriptors * @data_buf: data to transfer * @length: data length * * Return: transferred length on success, otherwise a negative errno */ static ssize_t smb2_read_rdma(struct ksmbd_work *work, struct smb2_read_req *req, void *data_buf, size_t length) { int err; err = ksmbd_conn_rdma_write(work->conn, data_buf, length, (struct smbdirect_buffer_descriptor_v1 *) ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), le16_to_cpu(req->ReadChannelInfoLength)); if (err) return err; return length; } /** * smb2_read() - handler for smb2 read from file * @work: smb work containing read command buffer * * Return: 0 on success, otherwise error */ int smb2_read(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_read_req *req; struct smb2_read_rsp *rsp; struct ksmbd_file *fp = NULL; loff_t offset; size_t length, mincount; ssize_t nbytes = 0, remain_bytes = 0; int err = 0; int rdma_transform_len = 0; bool is_rdma_channel = false, async_interim = false; unsigned int max_read_size = conn->vals->max_read_size; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; void *aux_payload_buf; ksmbd_debug(SMB, "Received smb2 read request\n"); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe read request\n"); return smb2_read_pipe(work); } if (work->next_smb2_rcv_hdr_off) { req = ksmbd_req_buf_next(work); rsp = ksmbd_resp_buf_next(work); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } else { req = smb_get_msg(work->request_buf); rsp = smb_get_msg(work->response_buf); } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } if (req->Channel != SMB2_CHANNEL_NONE && req->Channel != SMB2_CHANNEL_RDMA_V1 && req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE) { err = -EINVAL; goto out; } if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || req->Channel == SMB2_CHANNEL_RDMA_V1) { is_rdma_channel = true; max_read_size = get_smbd_max_read_write_size(work->conn->transport); if (max_read_size == 0) { err = -EINVAL; goto out; } } if (is_rdma_channel == true) { unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); unsigned int ch_len = le16_to_cpu(req->ReadChannelInfoLength); unsigned int req_len = smb2_current_req_len(work, &req->hdr); struct smbdirect_buffer_descriptor_v1 *desc; if (!le32_to_cpu(req->Length) || ch_offset < offsetof(struct smb2_read_req, Buffer) || ch_offset > req_len || ch_len > req_len - ch_offset) { err = -EINVAL; goto out; } desc = (struct smbdirect_buffer_descriptor_v1 *) ((char *)req + ch_offset); err = check_rdma_desc(desc, ch_len, le32_to_cpu(req->Length)); if (err) goto out; err = smb2_set_rdma_key(work, desc, req->Channel, req->ReadChannelInfoLength); if (err) goto out; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) { err = -ENOENT; goto out; } err = smb2_set_request_open(work, fp, &req->hdr, true, true); if (err) goto out; if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { pr_err("Not permitted to read : 0x%x\n", fp->daccess); err = -EACCES; goto out; } if (work->next_smb2_rcv_hdr_off && !req->hdr.NextCommand) { err = setup_async_work(work, NULL, NULL); if (err) goto out; smb2_send_interim_resp(work, STATUS_PENDING); async_interim = true; } offset = le64_to_cpu(req->Offset); if (offset < 0) { err = -EINVAL; goto out; } length = le32_to_cpu(req->Length); mincount = le32_to_cpu(req->MinimumCount); if (length > max_read_size) { ksmbd_debug(SMB, "limiting read size to max size(%u)\n", max_read_size); err = -EINVAL; goto out; } ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", fp->filp, offset, length); aux_payload_buf = kvmalloc(ALIGN(length, 8), KSMBD_DEFAULT_GFP); if (!aux_payload_buf) { err = -ENOMEM; goto out; } nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); if (nbytes < 0) { kvfree(aux_payload_buf); err = nbytes; goto out; } /* * ksmbd_vfs_read() fills only nbytes; the [nbytes, ALIGN(nbytes, 8)) * tail of the un-zeroed buffer is transmitted as compound-response * alignment padding, leaking uninitialized kernel memory to the * client. Zero just that tail. */ if (nbytes & 7) memset(aux_payload_buf + nbytes, 0, ALIGN(nbytes, 8) - nbytes); if ((nbytes == 0 && length != 0) || nbytes < mincount) { kvfree(aux_payload_buf); rsp->hdr.Status = STATUS_END_OF_FILE; smb2_set_err_rsp(work); if (async_interim) release_async_work(work); ksmbd_fd_put(work, fp); return -ENODATA; } ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", nbytes, offset, mincount); if (is_rdma_channel == true) { rdma_transform_len = smb2_prep_rdma_read(work, req, rsp, aux_payload_buf, nbytes); if (rdma_transform_len < 0) { kvfree(aux_payload_buf); err = rdma_transform_len; goto out; } /* write data to the client using rdma channel */ remain_bytes = smb2_read_rdma(work, req, aux_payload_buf, nbytes); if (remain_bytes < 0) pr_err("RDMA READ transfer failed: session=%llu payload=%zu transform=%d rc=%zd\n", work->sess ? work->sess->id : 0, nbytes, rdma_transform_len, remain_bytes); else ksmbd_debug(RDMA, "RDMA READ transfer completed: session=%llu payload=%zu transform=%d\n", work->sess ? work->sess->id : 0, nbytes, rdma_transform_len); kvfree(aux_payload_buf); aux_payload_buf = NULL; nbytes = 0; if (remain_bytes < 0) { err = (int)remain_bytes; goto out; } } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 80; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(rdma_transform_len ?: nbytes); rsp->DataRemaining = cpu_to_le32(remain_bytes); rsp->Flags = rdma_transform_len ? SMB2_READFLAG_RESPONSE_RDMA_TRANSFORM : 0; err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, offsetof(struct smb2_read_rsp, Buffer) + rdma_transform_len, aux_payload_buf, nbytes); if (err) { kvfree(aux_payload_buf); goto out; } if (async_interim) release_async_work(work); /* * RDMA responses are transferred through channel buffers and encrypted * responses use the encryption transform, so only normal SMB transport * responses are candidates for compression. */ if (!is_rdma_channel && nbytes && (req->Flags & SMB2_READFLAG_REQUEST_COMPRESSED) && conn->compress_algorithm != SMB3_COMPRESS_NONE) work->compress_response = true; ksmbd_fd_put(work, fp); return 0; out: if (async_interim) release_async_work(work); if (err) { if (err == -EISDIR) rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; else if (err == -EAGAIN) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (err == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (err == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (err == -ESHARE) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (err == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); } ksmbd_fd_put(work, fp); return err; } /** * smb2_write_pipe() - handler for smb2 write on IPC pipe * @work: smb work containing write IPC pipe command buffer * * Return: 0 on success, otherwise error */ static noinline int smb2_write_pipe(struct ksmbd_work *work) { struct smb2_write_req *req; struct smb2_write_rsp *rsp; struct ksmbd_rpc_command *rpc_resp; u64 id = 0; int err = 0, ret = 0; char *data_buf; size_t length; WORK_BUFFERS(work, req, rsp); length = le32_to_cpu(req->Length); id = req->VolatileFileId; if ((u64)le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(work->request_buf)) { pr_err("invalid write data offset %u, smb_len %u\n", le16_to_cpu(req->DataOffset), get_rfc1002_len(work->request_buf)); err = -EINVAL; goto out; } data_buf = (char *)(((char *)&req->hdr.ProtocolId) + le16_to_cpu(req->DataOffset)); rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); if (rpc_resp) { if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { rsp->hdr.Status = STATUS_NOT_SUPPORTED; kvfree(rpc_resp); smb2_set_err_rsp(work); return -EOPNOTSUPP; } if (rpc_resp->flags != KSMBD_RPC_OK) { rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); kvfree(rpc_resp); return ret; } kvfree(rpc_resp); } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 0; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(length); rsp->DataRemaining = 0; rsp->Reserved2 = 0; err = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_write_rsp, Buffer)); out: if (err) { rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); } return err; } /** * smb2_write_rdma() - receive and store an RDMA WRITE payload * @work: request work item * @desc: client RDMA buffer descriptors * @desc_len: descriptor array length * @transform: parsed transform, or NULL for an untransformed transfer * @fp: target open file * @offset: target file offset * @length: transfer length * @sync: request synchronous storage completion * * Receive the payload, authenticate or decrypt it when required, and write it * to the target file. * * Return: written byte count on success, otherwise a negative errno */ static ssize_t smb2_write_rdma(struct ksmbd_work *work, struct smbdirect_buffer_descriptor_v1 *desc, unsigned int desc_len, struct smb2_rdma_write_transform *transform, struct ksmbd_file *fp, loff_t offset, size_t length, bool sync) { char *data_buf; int ret; ssize_t nbytes; data_buf = kvzalloc(length, KSMBD_DEFAULT_GFP); if (!data_buf) return -ENOMEM; ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, desc, desc_len); if (ret < 0) { if (transform) pr_err("RDMA WRITE encrypted transfer failed: session=%llu payload=%zu rdma_read_rc=%d\n", work->sess->id, length, ret); kvfree(data_buf); return ret; } if (transform && transform->type == SMB2_RDMA_TRANSFORM_TYPE_ENCRYPTION) { ret = ksmbd_crypt_rdma(work->conn, work->sess->smb3decryptionkey, data_buf, length, transform->nonce, transform->nonce_len, transform->crypto->Signature, transform->signature_len, false); if (ret) { pr_err("RDMA WRITE decryption failed: session=%llu payload=%zu rc=%d\n", work->sess->id, length, ret); kvfree(data_buf); return ret == -ENOMEM ? ret : -EBADMSG; } } ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); kvfree(data_buf); if (ret < 0) { if (transform) pr_err("RDMA WRITE encrypted file write failed: session=%llu payload=%zu rc=%d\n", work->sess->id, length, ret); return ret; } ksmbd_debug(RDMA, "RDMA WRITE transfer completed: session=%llu payload=%zu transformed=%u written=%zd\n", work->sess ? work->sess->id : 0, length, !!transform, nbytes); return nbytes; } /** * smb2_write() - handler for smb2 write from file * @work: smb work containing write command buffer * * Return: 0 on success, otherwise error */ int smb2_write(struct ksmbd_work *work) { struct smb2_write_req *req; struct smb2_write_rsp *rsp; struct smb2_rdma_write_transform rdma_transform = {}; struct smb2_rdma_write_transform *rdma_info = NULL; struct smbdirect_buffer_descriptor_v1 *rdma_desc = NULL; unsigned int rdma_desc_len = 0; struct ksmbd_file *fp = NULL; loff_t offset; size_t length; ssize_t nbytes; char *data_buf; bool writethrough = false, is_rdma_channel = false; bool async_interim = false; bool chseq_err = false; int err = 0; unsigned int max_write_size = work->conn->vals->max_write_size; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; ksmbd_debug(SMB, "Received smb2 write request\n"); WORK_BUFFERS(work, req, rsp); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (work->next_smb2_rcv_hdr_off && !has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe write request\n"); return smb2_write_pipe(work); } offset = le64_to_cpu(req->Offset); if (offset < 0) { err = -EINVAL; goto out; } length = le32_to_cpu(req->Length); if (req->Channel != SMB2_CHANNEL_NONE && req->Channel != SMB2_CHANNEL_RDMA_V1 && req->Channel != SMB2_CHANNEL_RDMA_V1_INVALIDATE && req->Channel != SMB2_CHANNEL_RDMA_TRANSFORM) { err = -EINVAL; goto out; } if (req->Channel == SMB2_CHANNEL_RDMA_TRANSFORM && work->conn->dialect != SMB311_PROT_ID) { err = -EINVAL; goto out; } if (req->Channel == SMB2_CHANNEL_RDMA_V1 || req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || req->Channel == SMB2_CHANNEL_RDMA_TRANSFORM) { is_rdma_channel = true; max_write_size = get_smbd_max_read_write_size(work->conn->transport); if (max_write_size == 0) { err = -EINVAL; goto out; } length = le32_to_cpu(req->RemainingBytes); } if (length) { u64 end = (u64)offset + length; if (end > SMB2_MAX_FILE_SIZE) { err = -EINVAL; goto out; } if (end == SMB2_MAX_FILE_SIZE) { err = -EFBIG; goto out; } } if (is_rdma_channel == true) { unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); unsigned int ch_len = le16_to_cpu(req->WriteChannelInfoLength); unsigned int req_len = smb2_current_req_len(work, &req->hdr); if (!length || req->Length != 0 || req->DataOffset != 0 || ch_offset < offsetof(struct smb2_write_req, Buffer) || ch_offset > req_len || ch_len > req_len - ch_offset) { err = -EINVAL; goto out; } if (req->Channel == SMB2_CHANNEL_RDMA_TRANSFORM) { err = smb2_parse_rdma_write_transform(work, req, &rdma_transform); if (err) { pr_err("RDMA WRITE encryption metadata rejected: session=%llu rc=%d\n", work->sess ? work->sess->id : 0, err); goto out; } rdma_desc = rdma_transform.desc; rdma_desc_len = rdma_transform.desc_len; rdma_info = &rdma_transform; err = smb2_set_rdma_key(work, rdma_desc, rdma_transform.channel, cpu_to_le16(rdma_desc_len)); } else { rdma_desc = (struct smbdirect_buffer_descriptor_v1 *) ((char *)req + ch_offset); rdma_desc_len = ch_len; err = check_rdma_desc(rdma_desc, rdma_desc_len, length); if (err) goto out; err = smb2_set_rdma_key(work, rdma_desc, req->Channel, req->WriteChannelInfoLength); } if (err) goto out; } if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); err = -EACCES; goto out; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) { err = -ENOENT; goto out; } err = smb2_set_request_open(work, fp, &req->hdr, true, false); if (err) { rsp->hdr.Status = STATUS_FILE_NOT_AVAILABLE; chseq_err = true; goto out; } if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { pr_err("Not permitted to write : 0x%x\n", fp->daccess); err = -EACCES; goto out; } if (work->next_smb2_rcv_hdr_off && !req->hdr.NextCommand) { err = setup_async_work(work, NULL, NULL); if (err) goto out; smb2_send_interim_resp(work, STATUS_PENDING); async_interim = true; } if (length > max_write_size) { ksmbd_debug(SMB, "limiting write size to max size(%u)\n", max_write_size); err = -EINVAL; goto out; } ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) writethrough = true; if (is_rdma_channel == false) { if (le16_to_cpu(req->DataOffset) < offsetof(struct smb2_write_req, Buffer)) { err = -EINVAL; goto out; } data_buf = (char *)(((char *)&req->hdr.ProtocolId) + le16_to_cpu(req->DataOffset)); ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", fp->filp, offset, length); err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, writethrough, &nbytes); if (err < 0) goto out; } else { /* read data from the client using rdma channel, and * write the data. */ nbytes = smb2_write_rdma(work, rdma_desc, rdma_desc_len, rdma_info, fp, offset, length, writethrough); if (nbytes < 0) { err = (int)nbytes; goto out; } } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 0; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(nbytes); rsp->DataRemaining = 0; rsp->Reserved2 = 0; err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); if (err) goto out; if (async_interim) release_async_work(work); ksmbd_fd_put(work, fp); return 0; out: if (async_interim) release_async_work(work); if (err == -EAGAIN && !chseq_err) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (err == -ENOSPC || err == -EFBIG) rsp->hdr.Status = STATUS_DISK_FULL; else if (err == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (err == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (err == -ESHARE) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (err == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (err == -EBADMSG) rsp->hdr.Status = STATUS_AUTH_TAG_MISMATCH; else if (err == -EKEYREJECTED) rsp->hdr.Status = STATUS_INVALID_SIGNATURE; else if (rsp->hdr.Status == 0) rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return err; } /** * smb2_flush() - handler for smb2 flush file - fsync * @work: smb work containing flush command buffer * * Return: 0 on success, otherwise error */ int smb2_flush(struct ksmbd_work *work) { struct smb2_flush_req *req; struct smb2_flush_rsp *rsp; u64 id = KSMBD_NO_FID, pid = KSMBD_NO_FID; int err; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "Received smb2 flush request(fid : %llu)\n", req->VolatileFileId); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (work->next_smb2_rcv_hdr_off && !has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } err = ksmbd_vfs_fsync(work, id, pid); if (err) goto out; rsp->StructureSize = cpu_to_le16(4); rsp->Reserved = 0; return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); out: rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); return err; } /** * smb2_cancel() - handler for smb2 cancel command * @work: smb work containing cancel command buffer * * Return: 0 on success, otherwise error */ int smb2_cancel(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_hdr *hdr = smb_get_msg(work->request_buf); struct smb2_hdr *chdr; struct ksmbd_work *iter; struct ksmbd_work *cancelled_notify = NULL; struct list_head *command_list; if (work->next_smb2_rcv_hdr_off) hdr = ksmbd_resp_buf_next(work); ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", le64_to_cpu(hdr->MessageId), le32_to_cpu(hdr->Flags)); if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { command_list = &conn->async_requests; spin_lock(&conn->request_lock); list_for_each_entry(iter, command_list, async_request_entry) { chdr = smb_get_msg(iter->request_buf); if (iter->async_id != le64_to_cpu(hdr->Id.AsyncId)) continue; /* * Only an ACTIVE deferred work may have its cancel_fn * fired. A CANCELLED or CLOSED work already took the * smb2_lock() non-ACTIVE early-exit that frees the * file_lock and skips release_async_work(), so it is * still on conn->async_requests with a live cancel_fn * pointing at the freed file_lock. */ if (cmpxchg(&iter->state, KSMBD_WORK_ACTIVE, KSMBD_WORK_CANCELLED) != KSMBD_WORK_ACTIVE) break; ksmbd_debug(SMB, "smb2 with AsyncId %llu cancelled command = 0x%x\n", le64_to_cpu(hdr->Id.AsyncId), le16_to_cpu(chdr->Command)); if (iter->cancel_fn == smb2_notify_cancel_fn) cancelled_notify = smb2_notify_cancel_claim(iter->cancel_argv); else if (iter->cancel_fn) iter->cancel_fn(iter->cancel_argv); break; } spin_unlock(&conn->request_lock); /* * Complete a cancelled notify before this CANCEL handler returns. * Deferring it to the system workqueue lets a following request and * its response overtake STATUS_CANCELLED, leaving clients waiting * for the original notify even though the cancellation was accepted. */ if (cancelled_notify) smb2_complete_notify_cancel(cancelled_notify); } else { command_list = &conn->requests; spin_lock(&conn->request_lock); list_for_each_entry(iter, command_list, request_entry) { chdr = smb_get_msg(iter->request_buf); if (chdr->MessageId != hdr->MessageId || iter == work) continue; if (cmpxchg(&iter->state, KSMBD_WORK_ACTIVE, KSMBD_WORK_CANCELLED) != KSMBD_WORK_ACTIVE) break; ksmbd_debug(SMB, "smb2 with mid %llu cancelled command = 0x%x\n", le64_to_cpu(hdr->MessageId), le16_to_cpu(chdr->Command)); if (iter->cancel_fn) iter->cancel_fn(iter->cancel_argv); break; } spin_unlock(&conn->request_lock); } /* For SMB2_CANCEL command itself send no response*/ work->send_no_response = 1; return 0; } struct file_lock *smb_flock_init(struct file *f) { struct file_lock *fl; fl = locks_alloc_lock(); if (!fl) goto out; locks_init_lock(fl); fl->c.flc_owner = f; fl->c.flc_pid = current->tgid; fl->c.flc_file = f; fl->c.flc_flags = FL_POSIX; fl->fl_ops = NULL; fl->fl_lmops = NULL; out: return fl; } static int smb2_set_flock_flags(struct file_lock *flock, int flags) { int cmd = -EINVAL; /* Checking for wrong flag combination during lock request*/ switch (flags) { case SMB2_LOCKFLAG_SHARED: ksmbd_debug(SMB, "received shared request\n"); cmd = F_SETLKW; flock->c.flc_type = F_RDLCK; flock->c.flc_flags |= FL_SLEEP; break; case SMB2_LOCKFLAG_EXCLUSIVE: ksmbd_debug(SMB, "received exclusive request\n"); cmd = F_SETLKW; flock->c.flc_type = F_WRLCK; flock->c.flc_flags |= FL_SLEEP; break; case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: ksmbd_debug(SMB, "received shared & fail immediately request\n"); cmd = F_SETLK; flock->c.flc_type = F_RDLCK; break; case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: ksmbd_debug(SMB, "received exclusive & fail immediately request\n"); cmd = F_SETLK; flock->c.flc_type = F_WRLCK; break; case SMB2_LOCKFLAG_UNLOCK: ksmbd_debug(SMB, "received unlock request\n"); flock->c.flc_type = F_UNLCK; cmd = F_SETLK; break; } return cmd; } static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, unsigned int cmd, int flags, bool zero_len, struct list_head *lock_list) { struct ksmbd_lock *lock; lock = kzalloc_obj(struct ksmbd_lock, KSMBD_DEFAULT_GFP); if (!lock) return NULL; lock->cmd = cmd; lock->fl = flock; lock->start = flock->fl_start; lock->end = flock->fl_end; lock->flags = flags; lock->zero_len = zero_len; INIT_LIST_HEAD(&lock->clist); INIT_LIST_HEAD(&lock->flist); INIT_LIST_HEAD(&lock->llist); list_add_tail(&lock->llist, lock_list); return lock; } static void smb2_remove_blocked_lock(void **argv) { struct file_lock *flock = (struct file_lock *)argv[0]; ksmbd_vfs_posix_lock_unblock(flock); locks_wake_up(flock); } static void smb2_free_lock(struct file_lock *flock) { ksmbd_vfs_posix_lock_unblock(flock); locks_free_lock(flock); } static void smb2_free_blocked_lock(struct file_lock *flock) { ksmbd_vfs_posix_lock_unblock(flock); locks_wake_up(flock); locks_free_lock(flock); } static inline bool lock_defer_pending(struct file_lock *fl) { /* check pending lock waiters */ return waitqueue_active(&fl->c.flc_wait); } /** * smb2_lock() - handler for smb2 file lock command * @work: smb work containing lock command buffer * * Return: 0 on success, otherwise error */ int smb2_lock(struct ksmbd_work *work) { struct smb2_lock_req *req; struct smb2_lock_rsp *rsp; struct smb2_lock_element *lock_ele; struct ksmbd_file *fp = NULL; struct file_lock *flock = NULL; struct file *filp = NULL; int lock_count; int flags = 0; int cmd = 0; int err = -EIO, i, rc = 0; u64 lock_start, lock_length; struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; struct ksmbd_conn *conn; int nolock = 0; LIST_HEAD(lock_list); LIST_HEAD(rollback_list); int prior_lock = 0, bkt; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; bool lock_replayed; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "Received smb2 lock request\n"); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (work->next_smb2_rcv_hdr_off && !has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) { ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); err = -ENOENT; goto out2; } err = smb2_set_request_open(work, fp, &req->hdr, false, false); if (err) goto out2; lock_replayed = smb2_verify_lock_sequence(work, fp, req); if (lock_replayed) goto lock_success; filp = fp->filp; lock_count = le16_to_cpu(req->LockCount); lock_ele = req->locks; ksmbd_debug(SMB, "lock count is %d\n", lock_count); /* * Cap lock_count at 64. The MS-SMB2 spec defines Open.LockSequenceArray * as exactly 64 entries so 64 is the intended ceiling. No real workload * comes close to this in a single request. */ if (!lock_count || lock_count > 64) { err = -EINVAL; goto out2; } for (i = 0; i < lock_count; i++) { flags = le32_to_cpu(lock_ele[i].Flags); flock = smb_flock_init(filp); if (!flock) goto out; cmd = smb2_set_flock_flags(flock, flags); lock_start = le64_to_cpu(lock_ele[i].Offset); lock_length = le64_to_cpu(lock_ele[i].Length); if (lock_start > OFFSET_MAX || (lock_length && lock_length - 1 > OFFSET_MAX - lock_start)) { pr_err("Invalid lock range requested\n"); rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; locks_free_lock(flock); goto out; } flock->fl_start = lock_start; flock->fl_end = lock_length ? flock->fl_start + lock_length - 1 : flock->fl_start; /* Check conflict locks in one request */ list_for_each_entry(cmp_lock, &lock_list, llist) { if (cmp_lock->fl->fl_start <= flock->fl_start && cmp_lock->fl->fl_end >= flock->fl_end) { if (cmp_lock->fl->c.flc_type != F_UNLCK && flock->c.flc_type != F_UNLCK) { pr_err("conflict two locks in one request\n"); err = -EINVAL; locks_free_lock(flock); goto out; } } } smb_lock = smb2_lock_init(flock, cmd, flags, !lock_length, &lock_list); if (!smb_lock) { err = -EINVAL; locks_free_lock(flock); goto out; } } list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { if (lock_count > 1 && !(le32_to_cpu(lock_ele[0].Flags) & SMB2_LOCKFLAG_UNLOCK) && !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) { err = -EINVAL; goto out; } if (smb_lock->cmd < 0) { err = -EINVAL; goto out; } if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { err = -EINVAL; goto out; } if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || (prior_lock == SMB2_LOCKFLAG_UNLOCK && !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { err = -EINVAL; goto out; } prior_lock = smb_lock->flags; if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) goto no_check_cl; nolock = 1; /* check locks in connection list */ down_read(&conn_list_lock); hash_for_each(conn_list, bkt, conn, hlist) { spin_lock(&conn->llist_lock); list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { if (file_inode(cmp_lock->fl->c.flc_file) != file_inode(smb_lock->fl->c.flc_file)) continue; if (lock_is_unlock(smb_lock->fl)) { if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && cmp_lock->start == smb_lock->start && cmp_lock->end == smb_lock->end && !lock_defer_pending(cmp_lock->fl)) { nolock = 0; list_del_init(&cmp_lock->flist); list_del_init(&cmp_lock->clist); cmp_lock->conn = NULL; spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); ksmbd_conn_put(conn); smb2_free_lock(cmp_lock->fl); kfree(cmp_lock); goto out_check_cl; } continue; } if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) continue; } else { if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) continue; } /* check zero byte lock range */ if (cmp_lock->zero_len && !smb_lock->zero_len && cmp_lock->start > smb_lock->start && cmp_lock->start <= smb_lock->end) { spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); pr_err("previous lock conflict with zero byte lock range\n"); goto out; } if (smb_lock->zero_len && !cmp_lock->zero_len && smb_lock->start > cmp_lock->start && smb_lock->start <= cmp_lock->end) { spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); pr_err("current lock conflict with zero byte lock range\n"); goto out; } if (cmp_lock->start <= smb_lock->end && smb_lock->start <= cmp_lock->end && !cmp_lock->zero_len && !smb_lock->zero_len) { spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); pr_err("Not allow lock operation on exclusive lock range\n"); goto out; } } spin_unlock(&conn->llist_lock); } up_read(&conn_list_lock); out_check_cl: if (lock_is_unlock(smb_lock->fl) && nolock) { pr_err("Try to unlock nolocked range\n"); rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; goto out; } no_check_cl: flock = smb_lock->fl; list_del(&smb_lock->llist); if (smb_lock->zero_len) { err = 0; goto skip; } retry: rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); skip: if (smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) { locks_free_lock(flock); kfree(smb_lock); if (!rc) { ksmbd_debug(SMB, "File unlocked\n"); } else if (rc == -ENOENT) { rsp->hdr.Status = STATUS_NOT_LOCKED; err = rc; goto out; } } else { if (rc == FILE_LOCK_DEFERRED) { void **argv; ksmbd_debug(SMB, "would have to wait for getting lock\n"); argv = kmalloc(sizeof(void *), KSMBD_DEFAULT_GFP); if (!argv) { err = -ENOMEM; smb2_free_blocked_lock(flock); kfree(smb_lock); goto out; } argv[0] = flock; rc = setup_async_work(work, smb2_remove_blocked_lock, argv); if (rc) { kfree(argv); err = -ENOMEM; smb2_free_blocked_lock(flock); kfree(smb_lock); goto out; } list_add(&smb_lock->llist, &rollback_list); spin_lock(&fp->f_lock); list_add(&work->fp_entry, &fp->blocked_works); spin_unlock(&fp->f_lock); smb2_send_interim_resp(work, STATUS_PENDING); ksmbd_vfs_posix_lock_wait(flock); spin_lock(&fp->f_lock); list_del(&work->fp_entry); spin_unlock(&fp->f_lock); list_del(&smb_lock->llist); if (work->state == KSMBD_WORK_CANCELLED) { rsp->hdr.Status = STATUS_CANCELLED; kfree(smb_lock); smb2_send_interim_resp(work, STATUS_CANCELLED); release_async_work(work); locks_free_lock(flock); work->send_no_response = 1; goto out; } release_async_work(work); if (work->state == KSMBD_WORK_ACTIVE) goto retry; locks_free_lock(flock); rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; kfree(smb_lock); /* rollback_list may still hold earlier grants */ goto out; } else if (!rc) { list_add(&smb_lock->llist, &rollback_list); ksmbd_debug(SMB, "successful in taking lock\n"); } else { locks_free_lock(flock); kfree(smb_lock); err = rc; goto out; } } } if (atomic_read(&fp->f_ci->op_count) > 1) smb_break_all_oplock(work, fp); lock_success: rsp->StructureSize = cpu_to_le16(4); ksmbd_debug(SMB, "successful in taking lock\n"); rsp->hdr.Status = STATUS_SUCCESS; rsp->Reserved = 0; err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); if (err) goto out; /* publish only once the whole batch has committed */ if (!list_empty(&rollback_list)) { spin_lock(&work->conn->llist_lock); list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { list_del_init(&smb_lock->llist); smb_lock->conn = ksmbd_conn_get(work->conn); list_add_tail(&smb_lock->clist, &work->conn->lock_list); list_add_tail(&smb_lock->flist, &fp->lock_list); } spin_unlock(&work->conn->llist_lock); } if (!lock_replayed) smb2_update_lock_sequence(work, fp, req); ksmbd_fd_put(work, fp); return 0; out: list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { locks_free_lock(smb_lock->fl); list_del(&smb_lock->llist); kfree(smb_lock); } list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { struct file_lock *rlock = NULL; rlock = smb_flock_init(filp); if (rlock) { rlock->c.flc_type = F_UNLCK; rlock->fl_start = smb_lock->start; rlock->fl_end = smb_lock->end; rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); if (rc) pr_err("rollback unlock fail : %d\n", rc); } else { pr_err("rollback unlock alloc failed\n"); } list_del(&smb_lock->llist); smb2_free_lock(smb_lock->fl); if (rlock) locks_free_lock(rlock); kfree(smb_lock); } out2: ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); if (!rsp->hdr.Status) { if (err == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (err == -ENOMEM) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; else if (err == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; } smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return err; } static int fsctl_copychunk(struct ksmbd_work *work, struct copychunk_ioctl_req *ci_req, unsigned int cnt_code, unsigned int input_count, unsigned long long volatile_id, unsigned long long persistent_id, struct smb2_ioctl_rsp *rsp) { struct copychunk_ioctl_rsp *ci_rsp; struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; struct srv_copychunk *chunks; unsigned int i, chunk_count, chunk_count_written = 0; unsigned int chunk_size_written = 0; loff_t total_size_written = 0; int ret = 0; ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; rsp->VolatileFileId = volatile_id; rsp->PersistentFileId = persistent_id; ci_rsp->ChunksWritten = cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); ci_rsp->ChunkBytesWritten = cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); ci_rsp->TotalBytesWritten = cpu_to_le32(ksmbd_server_side_copy_max_total_size()); chunk_count = le32_to_cpu(ci_req->ChunkCount); /* * ChunkCount=0 is the standard SMB2 "query my copy limits" request * (no data copied) -- but macOS Finder's Cmd+D duplicate sends * FSCTL_SRV_COPYCHUNK with ChunkCount=0 meaning "copy the whole * file", relying on the AAPL-negotiated server to do a full copy * instead. Keep the standard no-op behavior for everyone else. * * Gate on the TIME_MACHINE share flag, not just conn->is_aapl: * that flag alone has ambiguous provenance -- the pre-existing * narrow UniqueId=0 path can also set it on ordinary, * non-Time-Machine shares, and this series' stated design keeps * every AAPL-driven behavior opt-in per share. */ if (chunk_count == 0 && !(work->conn->is_aapl && test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_TIME_MACHINE))) goto out; total_size_written = 0; i = 0; if (chunk_count) { /* verify the SRV_COPYCHUNK_COPY packet */ if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || input_count < struct_size(ci_req, Chunks, chunk_count)) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; return -EINVAL; } chunks = &ci_req->Chunks[0]; for (i = 0; i < chunk_count; i++) { if (le32_to_cpu(chunks[i].Length) == 0 || le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) break; total_size_written += le32_to_cpu(chunks[i].Length); } } else { chunks = &ci_req->Chunks[0]; } if (i < chunk_count || total_size_written > ksmbd_server_side_copy_max_total_size()) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; return -EINVAL; } src_fp = ksmbd_lookup_foreign_fd(work, le64_to_cpu(ci_req->SourceKeyU64[0])); dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); ret = -EINVAL; if (!src_fp || src_fp->persistent_id != le64_to_cpu(ci_req->SourceKeyU64[1])) { rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; goto out; } if (!dst_fp) { rsp->hdr.Status = STATUS_FILE_CLOSED; goto out; } /* * FILE_READ_DATA should only be included in * the FSCTL_SRV_COPYCHUNK case */ if (cnt_code == FSCTL_SRV_COPYCHUNK && !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { rsp->hdr.Status = STATUS_ACCESS_DENIED; goto out; } ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, chunks, chunk_count, &chunk_count_written, &chunk_size_written, &total_size_written); if (ret < 0) { if (ret == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (ret == -EAGAIN) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (ret == -EBADF) rsp->hdr.Status = STATUS_INVALID_HANDLE; else if (ret == -EFBIG || ret == -ENOSPC) rsp->hdr.Status = STATUS_DISK_FULL; else if (ret == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (ret == -EISDIR) rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; else if (ret == -E2BIG) rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; else rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; } ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); out: ksmbd_fd_put(work, src_fp); ksmbd_fd_put(work, dst_fp); return ret; } static __be32 idev_ipv4_address(struct in_device *idev) { __be32 addr = 0; struct in_ifaddr *ifa; rcu_read_lock(); in_dev_for_each_ifa_rcu(ifa, idev) { if (ifa->ifa_flags & IFA_F_SECONDARY) continue; addr = ifa->ifa_address; break; } rcu_read_unlock(); return addr; } static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, struct smb2_ioctl_rsp *rsp, unsigned int out_buf_len) { struct network_interface_info_ioctl_rsp *nii_rsp = NULL; int nbytes = 0; struct net_device *netdev; struct sockaddr_storage_rsp *sockaddr_storage; unsigned int flags; unsigned long long speed; rtnl_lock(); for_each_netdev(&init_net, netdev) { bool ipv4_set = false; if (netdev->type == ARPHRD_LOOPBACK) continue; if (!ksmbd_find_netdev_name_iface_list(netdev->name)) continue; flags = netif_get_flags(netdev); if (!(flags & IFF_RUNNING)) continue; ipv6_retry: if (out_buf_len < nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { rtnl_unlock(); return -ENOSPC; } nii_rsp = (struct network_interface_info_ioctl_rsp *) &rsp->Buffer[nbytes]; nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); nii_rsp->Capability = 0; if (netdev->real_num_tx_queues > 1) nii_rsp->Capability |= RSS_CAPABLE; if (ksmbd_rdma_capable_netdev(netdev)) nii_rsp->Capability |= RDMA_CAPABLE; nii_rsp->Next = cpu_to_le32(152); nii_rsp->Reserved = 0; if (netdev->ethtool_ops->get_link_ksettings) { struct ethtool_link_ksettings cmd; netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); speed = cmd.base.speed; } else { ksmbd_debug(SMB, "%s %s\n", netdev->name, "speed is unknown, defaulting to 1Gb/sec"); speed = SPEED_1000; } speed *= 1000000; nii_rsp->LinkSpeed = cpu_to_le64(speed); sockaddr_storage = (struct sockaddr_storage_rsp *) nii_rsp->SockAddr_Storage; memset(sockaddr_storage, 0, 128); if (!ipv4_set) { struct in_device *idev; sockaddr_storage->Family = INTERNETWORK; sockaddr_storage->addr4.Port = 0; idev = __in_dev_get_rtnl(netdev); if (!idev) continue; sockaddr_storage->addr4.IPv4Address = idev_ipv4_address(idev); nbytes += sizeof(struct network_interface_info_ioctl_rsp); ipv4_set = true; goto ipv6_retry; } else { struct inet6_dev *idev6; struct inet6_ifaddr *ifa; __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6Address; sockaddr_storage->Family = INTERNETWORKV6; sockaddr_storage->addr6.Port = 0; sockaddr_storage->addr6.FlowInfo = 0; idev6 = __in6_dev_get(netdev); if (!idev6) continue; list_for_each_entry(ifa, &idev6->addr_list, if_list) { if (ifa->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED)) continue; memcpy(ipv6_addr, ifa->addr.s6_addr, 16); break; } sockaddr_storage->addr6.ScopeId = 0; nbytes += sizeof(struct network_interface_info_ioctl_rsp); } } rtnl_unlock(); /* zero if this is last one */ if (nii_rsp) nii_rsp->Next = 0; rsp->PersistentFileId = SMB2_NO_FID; rsp->VolatileFileId = SMB2_NO_FID; return nbytes; } static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, struct validate_negotiate_info_req *neg_req, struct validate_negotiate_info_rsp *neg_rsp, unsigned int in_buf_len) { int ret = 0; int dialect; if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) return -EINVAL; dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, neg_req->DialectCount); if (dialect == BAD_PROT_ID || dialect != conn->dialect) { ret = -EINVAL; goto err_out; } if (memcmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { ret = -EINVAL; goto err_out; } if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { ret = -EINVAL; goto err_out; } if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { ret = -EINVAL; goto err_out; } neg_rsp->Capabilities = cpu_to_le32(conn->vals->req_capabilities); memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); neg_rsp->Dialect = cpu_to_le16(conn->dialect); err_out: return ret; } static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, struct file_allocated_range_buffer *qar_req, struct file_allocated_range_buffer *qar_rsp, unsigned int in_count, unsigned int *out_count) { struct ksmbd_file *fp; loff_t start, length; int ret = 0; *out_count = 0; start = le64_to_cpu(qar_req->file_offset); length = le64_to_cpu(qar_req->length); if (start < 0 || length < 0) return -EINVAL; fp = ksmbd_lookup_fd_fast(work, id); if (!fp) return -ENOENT; if (!(fp->daccess & FILE_READ_DATA_LE)) { ret = -EACCES; goto out; } if (!in_count) { struct file_allocated_range_buffer range; ret = ksmbd_vfs_query_allocated_ranges(fp, start, length, &range, 1, out_count); if ((!ret || ret == -E2BIG) && *out_count) ret = -ENOSPC; *out_count = 0; } else { ret = ksmbd_vfs_query_allocated_ranges(fp, start, length, qar_rsp, in_count, out_count); } if (ret && ret != -E2BIG) *out_count = 0; out: ksmbd_fd_put(work, fp); return ret; } static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, unsigned int out_buf_len, struct smb2_ioctl_req *req, struct smb2_ioctl_rsp *rsp) { struct ksmbd_rpc_command *rpc_resp; char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); int nbytes = 0; rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, le32_to_cpu(req->InputCount)); if (rpc_resp) { if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { /* * set STATUS_SOME_NOT_MAPPED response * for unknown domain sid. */ rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { rsp->hdr.Status = STATUS_NOT_SUPPORTED; goto out; } else if (rpc_resp->flags != KSMBD_RPC_OK) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; goto out; } nbytes = rpc_resp->payload_sz; if (rpc_resp->payload_sz > out_buf_len) { rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; nbytes = out_buf_len; } if (!rpc_resp->payload_sz) { rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; goto out; } memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); } out: kvfree(rpc_resp); return nbytes; } static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, struct file_sparse *sparse) { struct ksmbd_file *fp; struct mnt_idmap *idmap; int ret = 0; __le32 old_fattr; if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); return -EACCES; } fp = ksmbd_lookup_fd_fast(work, id); if (!fp) return -ENOENT; if (S_ISDIR(file_inode(fp->filp)->i_mode)) { ret = -EINVAL; goto out; } if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE | FILE_WRITE_ATTRIBUTES_LE))) { ret = -EACCES; goto out; } idmap = file_mnt_idmap(fp->filp); old_fattr = fp->f_ci->m_fattr; if (!sparse->SetSparse && (old_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE)) { ret = ksmbd_vfs_zero_holes(fp); if (ret) goto out; } if (sparse->SetSparse) fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; else fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; if (fp->f_ci->m_fattr != old_fattr) { const struct cred *saved_cred; struct xattr_dos_attrib da = {0}; ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, fp->filp->f_path.dentry, &da); if (ret <= 0) { da.version = 4; da.itime = fp->itime; da.create_time = fp->create_time; da.flags = XATTR_DOSINFO_CREATE_TIME | XATTR_DOSINFO_ITIME; } da.attr = le32_to_cpu(fp->f_ci->m_fattr); da.flags |= XATTR_DOSINFO_ATTRIB; saved_cred = override_creds(fp->filp->f_cred); ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, &fp->filp->f_path, &da, true); revert_creds(saved_cred); if (ret) fp->f_ci->m_fattr = old_fattr; } out: ksmbd_fd_put(work, fp); return ret; } static int fsctl_request_resume_key(struct ksmbd_work *work, struct smb2_ioctl_req *req, struct resume_key_ioctl_rsp *key_rsp) { struct ksmbd_file *fp; fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); if (!fp) return -ENOENT; memset(key_rsp, 0, sizeof(*key_rsp)); key_rsp->ResumeKeyU64[0] = req->VolatileFileId; key_rsp->ResumeKeyU64[1] = req->PersistentFileId; ksmbd_fd_put(work, fp); return 0; } /** * smb2_ioctl() - handler for smb2 ioctl command * @work: smb work containing ioctl command buffer * * Return: 0 on success, otherwise error */ int smb2_ioctl(struct ksmbd_work *work) { struct smb2_ioctl_req *req; struct smb2_ioctl_rsp *rsp; unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; u64 id = KSMBD_NO_FID, pid = KSMBD_NO_FID; struct ksmbd_conn *conn = work->conn; int ret = 0; char *buffer; bool no_fileid_ioctl = false; bool chseq_err = false; ksmbd_debug(SMB, "Received smb2 ioctl request\n"); if (work->next_smb2_rcv_hdr_off) { req = ksmbd_req_buf_next(work); rsp = ksmbd_resp_buf_next(work); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } else { req = smb_get_msg(work->request_buf); rsp = smb_get_msg(work->response_buf); } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { ret = -EOPNOTSUPP; goto out; } buffer = (char *)req + le32_to_cpu(req->InputOffset); cnt_code = le32_to_cpu(req->CtlCode); switch (cnt_code) { case FSCTL_DFS_GET_REFERRALS: case FSCTL_DFS_GET_REFERRALS_EX: case FSCTL_QUERY_NETWORK_INTERFACE_INFO: case FSCTL_VALIDATE_NEGOTIATE_INFO: case FSCTL_PIPE_WAIT: case FSCTL_PIPE_TRANSCEIVE: no_fileid_ioctl = true; break; default: break; } if (!no_fileid_ioctl && has_file_id(id)) { struct ksmbd_file *fp; fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) { if (cnt_code == FSCTL_DUPLICATE_EXTENTS_TO_FILE) { rsp->hdr.Status = STATUS_FILE_CLOSED; goto out2; } ret = -ENOENT; goto out; } ret = smb2_set_request_open(work, fp, &req->hdr, true, false); ksmbd_fd_put(work, fp); if (ret) { rsp->hdr.Status = STATUS_FILE_NOT_AVAILABLE; chseq_err = true; goto out; } } ret = smb2_calc_max_out_buf_len(work, offsetof(struct smb2_ioctl_rsp, Buffer), le32_to_cpu(req->MaxOutputResponse)); if (ret < 0) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; goto out; } out_buf_len = (unsigned int)ret; in_buf_len = le32_to_cpu(req->InputCount); switch (cnt_code) { case FSCTL_SRV_ENUM_SNAPS: { struct srv_snapshot_array *snap_rsp; struct ksmbd_file *fp; if (out_buf_len < sizeof(*snap_rsp)) { ret = -EINVAL; goto out; } fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { ret = -ENOENT; goto out; } ksmbd_fd_put(work, fp); snap_rsp = (struct srv_snapshot_array *)rsp->Buffer; snap_rsp->NumberOfSnapShots = 0; snap_rsp->NumberOfSnapShotsReturned = 0; snap_rsp->SnapShotArraySize = cpu_to_le32(2); snap_rsp->Reserved = 0; nbytes = sizeof(*snap_rsp); break; } case FSCTL_DFS_GET_REFERRALS: case FSCTL_DFS_GET_REFERRALS_EX: /* Not support DFS yet */ ret = -EOPNOTSUPP; rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; goto out2; case FSCTL_GET_COMPRESSION: { struct compress_ioctl *cmpr_rsp; struct ksmbd_file *fp; u16 fmt; if (out_buf_len < sizeof(struct compress_ioctl)) { ret = -EINVAL; goto out; } fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { ret = -ENOENT; goto out; } ret = ksmbd_vfs_get_compression(fp, &fmt); ksmbd_fd_put(work, fp); if (ret < 0) goto out; cmpr_rsp = (struct compress_ioctl *)&rsp->Buffer[0]; cmpr_rsp->CompressionState = cpu_to_le16(fmt); nbytes = sizeof(struct compress_ioctl); rsp->PersistentFileId = req->PersistentFileId; rsp->VolatileFileId = req->VolatileFileId; break; } case FSCTL_SET_COMPRESSION: { struct compress_ioctl *cmpr_req; struct ksmbd_file *fp; if (in_buf_len < sizeof(struct compress_ioctl)) { ret = -EINVAL; goto out; } if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); ret = -EACCES; goto out; } cmpr_req = (struct compress_ioctl *)buffer; fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { ret = -ENOENT; goto out; } ret = ksmbd_vfs_set_compression(work, fp, le16_to_cpu(cmpr_req->CompressionState)); ksmbd_fd_put(work, fp); if (ret) goto out; break; } case FSCTL_CREATE_OR_GET_OBJECT_ID: { struct file_object_buf_type1_ioctl_rsp *obj_buf; struct ksmbd_file *fp; fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { ret = -EBADF; rsp->hdr.Status = STATUS_FILE_CLOSED; goto out2; } if (out_buf_len < sizeof(struct file_object_buf_type1_ioctl_rsp)) { ksmbd_fd_put(work, fp); ret = -EINVAL; goto out; } ksmbd_fd_put(work, fp); nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); obj_buf = (struct file_object_buf_type1_ioctl_rsp *) &rsp->Buffer[0]; /* * TODO: This is dummy implementation to pass smbtorture * Need to check correct response later */ memset(obj_buf->ObjectId, 0x0, 16); memset(obj_buf->BirthVolumeId, 0x0, 16); memset(obj_buf->BirthObjectId, 0x0, 16); memset(obj_buf->DomainId, 0x0, 16); break; } case FSCTL_PIPE_TRANSCEIVE: out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); break; case FSCTL_VALIDATE_NEGOTIATE_INFO: if (conn->dialect < SMB30_PROT_ID) { ret = -EOPNOTSUPP; goto out; } if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects)) { ret = -EINVAL; goto out; } if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { ret = -EINVAL; goto out; } ret = fsctl_validate_negotiate_info(conn, (struct validate_negotiate_info_req *)buffer, (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], in_buf_len); if (ret < 0) goto out; nbytes = sizeof(struct validate_negotiate_info_rsp); rsp->PersistentFileId = SMB2_NO_FID; rsp->VolatileFileId = SMB2_NO_FID; break; case FSCTL_QUERY_NETWORK_INTERFACE_INFO: if (req->PersistentFileId != SMB2_NO_FID || req->VolatileFileId != SMB2_NO_FID) { ret = -EINVAL; goto out; } ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); if (ret < 0) goto out; nbytes = ret; break; case FSCTL_SRV_REQUEST_RESUME_KEY: if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { ret = -EINVAL; goto out; } ret = fsctl_request_resume_key(work, req, (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); if (ret < 0) goto out; rsp->PersistentFileId = req->PersistentFileId; rsp->VolatileFileId = req->VolatileFileId; nbytes = sizeof(struct resume_key_ioctl_rsp); break; case FSCTL_SRV_COPYCHUNK: case FSCTL_SRV_COPYCHUNK_WRITE: if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); ret = -EACCES; goto out; } if (in_buf_len < offsetof(struct copychunk_ioctl_req, Chunks)) { ret = -EINVAL; goto out; } if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { ret = -EINVAL; goto out; } nbytes = sizeof(struct copychunk_ioctl_rsp); rsp->VolatileFileId = req->VolatileFileId; rsp->PersistentFileId = req->PersistentFileId; fsctl_copychunk(work, (struct copychunk_ioctl_req *)buffer, le32_to_cpu(req->CtlCode), le32_to_cpu(req->InputCount), req->VolatileFileId, req->PersistentFileId, rsp); break; case FSCTL_SET_SPARSE: { struct file_sparse sparse = {0}; if (in_buf_len && in_buf_len < sizeof(struct file_sparse)) { ret = -EINVAL; goto out; } *(u8 *)&sparse = 1; ret = fsctl_set_sparse(work, id, in_buf_len ? (struct file_sparse *)buffer : &sparse); if (ret < 0) goto out; break; } case FSCTL_SET_ZERO_DATA: { struct file_zero_data_information *zero_data; struct ksmbd_file *fp; loff_t off, len, bfz; if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); ret = -EACCES; goto out; } if (in_buf_len < sizeof(struct file_zero_data_information)) { ret = -EINVAL; goto out; } zero_data = (struct file_zero_data_information *)buffer; off = le64_to_cpu(zero_data->FileOffset); bfz = le64_to_cpu(zero_data->BeyondFinalZero); if (off < 0 || bfz < 0 || off > bfz) { ret = -EINVAL; goto out; } len = bfz - off; if (len) { fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { ret = -ENOENT; goto out; } if (!(fp->daccess & FILE_WRITE_DATA_LE)) { ksmbd_fd_put(work, fp); ret = -EACCES; goto out; } ret = ksmbd_vfs_zero_data(work, fp, off, len); ksmbd_fd_put(work, fp); if (ret == -EAGAIN) { rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; ret = 0; goto out; } else if (ret < 0) { goto out; } } break; } case FSCTL_FILE_LEVEL_TRIM: { struct file_level_trim *trim_req; struct file_level_trim_output *trim_rsp; struct ksmbd_file *fp; u32 i, num_ranges; if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); ret = -EACCES; goto out; } if (in_buf_len < offsetof(struct file_level_trim, Ranges)) { ret = -EINVAL; goto out; } if (out_buf_len < sizeof(struct file_level_trim_output)) { ret = -EINVAL; goto out; } trim_req = (struct file_level_trim *)buffer; num_ranges = le32_to_cpu(trim_req->NumRanges); if (num_ranges > (in_buf_len - offsetof(struct file_level_trim, Ranges)) / sizeof(struct file_level_trim_range)) { ret = -EINVAL; goto out; } fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { ret = -ENOENT; goto out; } if (!(fp->daccess & FILE_WRITE_DATA_LE)) { ksmbd_fd_put(work, fp); ret = -EACCES; goto out; } trim_rsp = (struct file_level_trim_output *)&rsp->Buffer[0]; trim_rsp->NumRangesProcessed = 0; for (i = 0; i < num_ranges; i++) { loff_t off = le64_to_cpu(trim_req->Ranges[i].Offset); loff_t len = le64_to_cpu(trim_req->Ranges[i].Length); if (off < 0 || len < 0) { ret = -EINVAL; break; } if (!len) { trim_rsp->NumRangesProcessed = cpu_to_le32(i + 1); continue; } ret = ksmbd_vfs_trim_data(work, fp, off, len); if (ret) break; trim_rsp->NumRangesProcessed = cpu_to_le32(i + 1); } ksmbd_fd_put(work, fp); if (ret == -EAGAIN) { rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; ret = 0; goto out; } else if (ret < 0) { goto out; } nbytes = sizeof(struct file_level_trim_output); break; } case FSCTL_QUERY_ALLOCATED_RANGES: if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { ret = -EINVAL; goto out; } ret = fsctl_query_allocated_ranges(work, id, (struct file_allocated_range_buffer *)buffer, (struct file_allocated_range_buffer *)&rsp->Buffer[0], out_buf_len / sizeof(struct file_allocated_range_buffer), &nbytes); if (ret == -E2BIG) { rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; } else if (ret < 0) { nbytes = 0; goto out; } nbytes *= sizeof(struct file_allocated_range_buffer); break; case FSCTL_GET_REPARSE_POINT: { struct reparse_data_buffer *reparse_ptr; struct ksmbd_file *fp; if (out_buf_len < sizeof(struct reparse_data_buffer)) { ret = -EINVAL; goto out; } reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { pr_err("not found fp!!\n"); ret = -ENOENT; goto out; } reparse_ptr->ReparseTag = smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); reparse_ptr->ReparseDataLength = 0; ksmbd_fd_put(work, fp); nbytes = sizeof(struct reparse_data_buffer); break; } case FSCTL_DUPLICATE_EXTENTS_TO_FILE: { struct ksmbd_file *fp_in, *fp_out = NULL; struct duplicate_extents_to_file *dup_ext; loff_t src_off, dst_off, length, cloned; if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { ret = -EINVAL; goto out; } dup_ext = (struct duplicate_extents_to_file *)buffer; fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, dup_ext->PersistentFileHandle); if (!fp_in) { pr_err("not found file handle in duplicate extent to file\n"); ret = -EBADF; rsp->hdr.Status = STATUS_INVALID_HANDLE; goto out2; } fp_out = ksmbd_lookup_fd_fast(work, id); if (!fp_out) { pr_err("not found fp\n"); ret = -EBADF; rsp->hdr.Status = STATUS_FILE_CLOSED; ksmbd_fd_put(work, fp_in); goto out2; } if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ret = -EACCES; goto dup_ext_out; } if (!(fp_out->daccess & FILE_WRITE_DATA_LE)) { ret = -EACCES; goto dup_ext_out; } if (!(fp_in->daccess & FILE_READ_DATA_LE)) { ret = -EACCES; goto dup_ext_out; } src_off = le64_to_cpu(dup_ext->SourceFileOffset); dst_off = le64_to_cpu(dup_ext->TargetFileOffset); length = le64_to_cpu(dup_ext->ByteCount); if (src_off < 0 || dst_off < 0 || length < 0 || src_off + length < src_off || dst_off + length < dst_off) { ret = -EINVAL; goto dup_ext_out; } if (src_off + length > i_size_read(file_inode(fp_in->filp))) { ret = -EOPNOTSUPP; goto dup_ext_out; } if (dst_off + length > i_size_read(file_inode(fp_out->filp))) goto dup_ext_out; if ((fp_in->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE) && !(fp_out->f_ci->m_fattr & FILE_ATTRIBUTE_SPARSE_FILE_LE)) { ret = -EOPNOTSUPP; goto dup_ext_out; } if (file_inode(fp_in->filp) == file_inode(fp_out->filp) && dst_off + length > src_off && dst_off < src_off + length) { ret = -EOPNOTSUPP; goto dup_ext_out; } cloned = vfs_clone_file_range(fp_in->filp, src_off, fp_out->filp, dst_off, length, 0); if (cloned != length) { cloned = vfs_copy_file_range(fp_in->filp, src_off, fp_out->filp, dst_off, length, 0); if (cloned != length) { if (cloned < 0) ret = cloned; else ret = -EINVAL; } } dup_ext_out: ksmbd_fd_put(work, fp_in); ksmbd_fd_put(work, fp_out); if (ret < 0) goto out; break; } default: ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", cnt_code); ret = -EOPNOTSUPP; goto out; } rsp->CtlCode = cpu_to_le32(cnt_code); rsp->InputCount = cpu_to_le32(0); rsp->InputOffset = cpu_to_le32(112); rsp->OutputOffset = cpu_to_le32(112); rsp->OutputCount = cpu_to_le32(nbytes); rsp->StructureSize = cpu_to_le16(49); rsp->Reserved = cpu_to_le16(0); rsp->Flags = cpu_to_le32(0); rsp->Reserved2 = cpu_to_le32(0); ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); if (!ret) return ret; out: if (ret == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (ret == -ENOENT) rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; else if (ret == -EOPNOTSUPP) rsp->hdr.Status = STATUS_NOT_SUPPORTED; else if (ret == -ENOSPC) rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; else if (!chseq_err && (ret < 0 || rsp->hdr.Status == 0)) rsp->hdr.Status = STATUS_INVALID_PARAMETER; out2: smb2_set_err_rsp(work); return ret; } /** * smb20_oplock_break_ack() - handler for smb2.0 oplock break command * @work: smb work containing oplock break command buffer * * Return: 0 */ static void smb20_oplock_break_ack(struct ksmbd_work *work) { struct smb2_oplock_break *req; struct smb2_oplock_break *rsp; struct ksmbd_file *fp; struct oplock_info *opinfo = NULL; __le32 status = STATUS_SUCCESS; int ret; u64 volatile_id, persistent_id; char req_oplevel = 0, rsp_oplevel = 0; WORK_BUFFERS(work, req, rsp); volatile_id = req->VolatileFid; persistent_id = req->PersistentFid; req_oplevel = req->OplockLevel; ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", volatile_id, persistent_id, req_oplevel); fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); if (!fp) { rsp->hdr.Status = STATUS_FILE_CLOSED; smb2_set_err_rsp(work); return; } ret = smb2_set_request_open(work, fp, &req->hdr, false, false); if (ret) { rsp->hdr.Status = STATUS_FILE_CLOSED; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return; } opinfo = opinfo_get(fp); if (!opinfo) { pr_err("unexpected null oplock_info\n"); rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return; } if (opinfo->op_state != OPLOCK_ACK_WAIT) { ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); if (smb3_hdr_replay(&req->hdr) && opinfo->op_state == OPLOCK_STATE_NONE) { rsp->StructureSize = cpu_to_le16(24); rsp->OplockLevel = opinfo->level; rsp->Reserved = 0; rsp->Reserved2 = 0; rsp->VolatileFid = volatile_id; rsp->PersistentFid = persistent_id; ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); if (ret) ksmbd_debug(SMB, "failed to pin replayed oplock break response: %d\n", ret); goto out_no_state_change; } if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) status = STATUS_INVALID_OPLOCK_PROTOCOL; else status = STATUS_INVALID_DEVICE_STATE; goto err_out; } if (req_oplevel == SMB2_OPLOCK_LEVEL_LEASE) { opinfo->level = SMB2_OPLOCK_LEVEL_NONE; status = STATUS_INVALID_PARAMETER; goto err_out; } if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { status = STATUS_INVALID_OPLOCK_PROTOCOL; goto err_out; } if (opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE && req_oplevel != SMB2_OPLOCK_LEVEL_II && req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { opinfo->level = SMB2_OPLOCK_LEVEL_NONE; status = STATUS_INVALID_OPLOCK_PROTOCOL; goto err_out; } if (opinfo->level == SMB2_OPLOCK_LEVEL_BATCH && req_oplevel != SMB2_OPLOCK_LEVEL_II && req_oplevel != SMB2_OPLOCK_LEVEL_NONE && req_oplevel != SMB2_OPLOCK_LEVEL_EXCLUSIVE) { opinfo->level = SMB2_OPLOCK_LEVEL_NONE; status = STATUS_INVALID_OPLOCK_PROTOCOL; goto err_out; } if (opinfo->level == SMB2_OPLOCK_LEVEL_II && req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { opinfo->level = SMB2_OPLOCK_LEVEL_NONE; status = STATUS_INVALID_OPLOCK_PROTOCOL; goto err_out; } if (req_oplevel == SMB2_OPLOCK_LEVEL_EXCLUSIVE) rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; else rsp_oplevel = req_oplevel; opinfo->level = rsp_oplevel; rsp->StructureSize = cpu_to_le16(24); rsp->OplockLevel = rsp_oplevel; rsp->Reserved = 0; rsp->Reserved2 = 0; rsp->VolatileFid = volatile_id; rsp->PersistentFid = persistent_id; ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); if (ret) ksmbd_debug(SMB, "failed to pin oplock break response: %d\n", ret); goto out; err_out: rsp->hdr.Status = status; smb2_set_err_rsp(work); out: spin_lock(&opinfo->state_lock); if (opinfo->op_state != OPLOCK_CLOSING) opinfo->op_state = OPLOCK_STATE_NONE; spin_unlock(&opinfo->state_lock); wake_up_interruptible_all(&opinfo->oplock_q); out_no_state_change: opinfo_put(opinfo); ksmbd_fd_put(work, fp); } static bool smb2_lease_state_valid(__le32 state) { return !(state & ~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_WRITE_CACHING_LE)); } static int check_lease_state(struct lease *lease, __le32 req_state) { if (smb2_lease_state_valid(req_state) && !(req_state & ~lease->new_state)) return 0; return 1; } /** * smb21_lease_break_ack() - handler for smb2.1 lease break command * @work: smb work containing lease break command buffer * * Return: 0 */ static void smb21_lease_break_ack(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_lease_ack *req; struct smb2_lease_ack *rsp; struct oplock_info *opinfo; int ret = 0; __le32 lease_state; struct lease *lease; WORK_BUFFERS(work, req, rsp); ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", le32_to_cpu(req->LeaseState)); opinfo = lookup_lease_in_table(conn, req->LeaseKey); if (!opinfo) { ksmbd_debug(OPLOCK, "file not opened\n"); smb2_set_err_rsp(work); rsp->hdr.Status = STATUS_UNSUCCESSFUL; return; } lease = opinfo->o_lease; if (opinfo->op_state == OPLOCK_STATE_NONE) { pr_err("unexpected lease break state 0x%x\n", opinfo->op_state); if (smb3_hdr_replay(&req->hdr)) goto replay_rsp; rsp->hdr.Status = STATUS_UNSUCCESSFUL; goto err_out; } if (!atomic_read(&opinfo->breaking_cnt)) { if (smb3_hdr_replay(&req->hdr)) goto replay_rsp; rsp->hdr.Status = STATUS_UNSUCCESSFUL; goto err_out; } if (check_lease_state(lease, req->LeaseState)) { rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; ksmbd_debug(OPLOCK, "req lease state: 0x%x, expected state: 0x%x\n", req->LeaseState, lease->new_state); goto err_out; } lease_state = req->LeaseState; lease->state = lease_state; lease->new_state = SMB2_LEASE_NONE_LE; lease_update_oplock_levels(lease); rsp->StructureSize = cpu_to_le16(36); rsp->Reserved = 0; rsp->Flags = 0; memcpy(rsp->LeaseKey, req->LeaseKey, 16); rsp->LeaseState = lease_state; rsp->LeaseDuration = 0; ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); if (ret) goto err_out; spin_lock(&opinfo->state_lock); if (opinfo->op_state != OPLOCK_CLOSING) opinfo->op_state = OPLOCK_STATE_NONE; spin_unlock(&opinfo->state_lock); wake_up_interruptible_all(&opinfo->oplock_q); atomic_dec_if_positive(&opinfo->breaking_cnt); wake_up_interruptible_all(&opinfo->oplock_brk); opinfo_put(opinfo); return; replay_rsp: rsp->StructureSize = cpu_to_le16(36); rsp->Reserved = 0; rsp->Flags = 0; memcpy(rsp->LeaseKey, req->LeaseKey, 16); rsp->LeaseState = lease->state; rsp->LeaseDuration = 0; ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); if (ret) goto err_out; opinfo_put(opinfo); return; err_out: smb2_set_err_rsp(work); opinfo_put(opinfo); return; } /** * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break * @work: smb work containing oplock/lease break command buffer * * Return: 0 on success, otherwise error */ int smb2_oplock_break(struct ksmbd_work *work) { struct smb2_oplock_break *req; struct smb2_oplock_break *rsp; ksmbd_debug(SMB, "Received smb2 oplock break acknowledgment request\n"); WORK_BUFFERS(work, req, rsp); switch (le16_to_cpu(req->StructureSize)) { case OP_BREAK_STRUCT_SIZE_20: smb20_oplock_break_ack(work); break; case OP_BREAK_STRUCT_SIZE_21: smb21_lease_break_ack(work); break; default: ksmbd_debug(OPLOCK, "invalid break cmd %d\n", le16_to_cpu(req->StructureSize)); rsp->hdr.Status = STATUS_INVALID_PARAMETER; smb2_set_err_rsp(work); return -EINVAL; } return 0; } /* * Cancel handler for a deferred CHANGE_NOTIFY. Races against * __ksmbd_close_fd()'s notify_pendings drain (vfs_cache.c), which can run * concurrently on a different connection closing the same handle -- only * one of the two may claim and free in_work, so both sides check * list_empty() under fp->f_lock before touching it (list_del_init() * leaves a node empty, so whichever side removes it first is the owner; * the loser must not touch in_work again, since the winner may already be * freeing it). * * smb2_cancel() holds conn->request_lock (a spinlock) for the entire * time it walks conn->async_requests and calls this function -- so this * runs with preemption disabled and must not sleep or re-acquire that * same lock. release_async_work() does both (it takes conn->request_lock * itself, and frees things that can involve sleeping paths), so calling * it from here would self-deadlock the very thread processing the * client's CANCEL command. ksmbd_conn_write() can also sleep (it takes * conn's write mutex). So: do only the non-sleeping, no-relock cleanup * inline here. smb2_cancel() sends and frees the claimed notify after it * drops request_lock, preserving response order for a client CANCEL. The * connection teardown caller has no such post-unlock path, so its wrapper * defers the send and free to a workqueue. */ struct notify_cancel_ctx { struct work_struct work; struct ksmbd_work *in_work; }; static void smb2_send_notify_cancelled(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb_get_msg(work->response_buf); struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess; sess = ksmbd_session_lookup(conn, le64_to_cpu(hdr->SessionId)); if (sess) { work->sess = sess; if (work->encrypted && sess->enc && conn->ops->encrypt_resp) { conn->ops->encrypt_resp(work); } else if (conn->ops->is_sign_req && conn->ops->set_sign_rsp && conn->ops->is_sign_req(work, conn->ops->get_cmd_val(work))) { conn->ops->set_sign_rsp(work); } } ksmbd_conn_write(work); if (sess) { ksmbd_user_session_put(sess); work->sess = NULL; } } static void smb2_notify_cancel_deferred(struct work_struct *w) { struct notify_cancel_ctx *ctx = container_of(w, struct notify_cancel_ctx, work); struct ksmbd_conn *conn = ctx->in_work->conn; smb2_complete_notify_cancel(ctx->in_work); kfree(ctx); /* * The connection teardown waits for r_count before destroying * connection sessions and their proc entries. */ ksmbd_conn_r_count_dec(conn); } static struct ksmbd_work *smb2_notify_cancel_claim(void **argv) { struct ksmbd_work *in_work = (struct ksmbd_work *)argv[0]; struct ksmbd_file *fp = (struct ksmbd_file *)argv[1]; bool claimed; spin_lock(&fp->f_lock); claimed = !list_empty(&in_work->notify_entry); if (claimed) list_del_init(&in_work->notify_entry); spin_unlock(&fp->f_lock); if (!claimed) return NULL; /* conn->request_lock is held by smb2_cancel() or connection teardown. */ in_work->cancel_fn = NULL; kfree(in_work->cancel_argv); in_work->cancel_argv = NULL; return in_work; } static void smb2_complete_notify_cancel(struct ksmbd_work *in_work) { struct smb2_hdr *in_hdr = smb_get_msg(in_work->response_buf); in_hdr->Status = STATUS_CANCELLED; smb2_send_notify_cancelled(in_work); release_async_work(in_work); ksmbd_free_work_struct(in_work); } static void smb2_notify_cancel_fn(void **argv) { struct ksmbd_work *in_work = smb2_notify_cancel_claim(argv); struct ksmbd_conn *conn; struct notify_cancel_ctx *ctx; if (!in_work) return; conn = in_work->conn; ctx = kmalloc_obj(*ctx, GFP_ATOMIC); if (!ctx) { /* Can't defer the response -- free without sending one. */ list_del_init(&in_work->async_request_entry); in_work->asynchronous = false; if (in_work->async_id) { ksmbd_release_id(&conn->async_ida, in_work->async_id); in_work->async_id = 0; } ksmbd_free_work_struct(in_work); return; } ctx->in_work = in_work; INIT_WORK(&ctx->work, smb2_notify_cancel_deferred); /* * This deferred work can outlive the connection handler's receive loop. * Keep teardown from destroying the connection's sessions until the * deferred response has finished using them. */ ksmbd_conn_r_count_inc(conn); schedule_work(&ctx->work); } /** * smb2_notify() - handler for smb2 notify request * @work: smb work containing notify command buffer * * Return: 0 on success, otherwise error */ int smb2_notify(struct ksmbd_work *work) { struct smb2_change_notify_req *req; struct smb2_change_notify_rsp *rsp; struct ksmbd_work *in_work; struct smb2_hdr *in_hdr; struct ksmbd_file *fp; ksmbd_debug(SMB, "Received smb2 notify\n"); WORK_BUFFERS(work, req, rsp); if (smb2_compound_has_failed(work, &rsp->hdr)) return -EACCES; if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { rsp->hdr.Status = STATUS_INTERNAL_ERROR; smb2_set_err_rsp(work); return -EIO; } /* * macOS backupd sends CHANGE_NOTIFY with FileId=FFFF...FFFF (share-root * sentinel) to watch for changes on the share root without holding an * open handle. Respond STATUS_PENDING + STATUS_NOTIFY_CLEANUP immediately; * without this, backupd aborts Time Machine setup on STATUS_FILE_CLOSED. */ if (req->VolatileFileId == SMB2_NO_FID && req->PersistentFileId == SMB2_NO_FID) { in_work = ksmbd_alloc_work_struct(); if (!in_work || allocate_interim_rsp_buf(in_work)) { if (in_work) ksmbd_free_work_struct(in_work); rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; smb2_set_err_rsp(work); return 0; } if (setup_async_work(work, NULL, NULL)) { ksmbd_free_work_struct(in_work); rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; smb2_set_err_rsp(work); return 0; } smb2_send_interim_resp(work, STATUS_PENDING); in_work->conn = work->conn; in_hdr = smb_get_msg(in_work->response_buf); memcpy(in_hdr, ksmbd_resp_buf_next(work), __SMB2_HEADER_STRUCTURE_SIZE); in_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; in_hdr->Id.AsyncId = cpu_to_le64(work->async_id); smb2_set_err_rsp(in_work); in_hdr->Status = STATUS_NOTIFY_CLEANUP; in_work->async_id = work->async_id; work->async_id = 0; release_async_work(work); if (smb2_send_interim_work(in_work, work, false)) ksmbd_debug(SMB, "failed to send notify cleanup\n"); ksmbd_free_work_struct(in_work); work->send_no_response = 1; return 0; } /* * KSMBD does not implement a real change-notification backend. * Genuine SMB2 servers (and macOS smbfs) never complete a * CHANGE_NOTIFY spontaneously: it is satisfied only by a real * directory change, or with STATUS_NOTIFY_CLEANUP when the watched * handle is closed. Completing it early (e.g. on a timer) makes * Finder treat the cleanup as "directory changed" and re-enumerate * the directory forever, leaving items unopenable. Returning * STATUS_NOT_IMPLEMENTED here (like stock ksmbd) makes macOS smbfs * hard-freeze on unmount, so this must stay deferred. */ fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); if (!fp) { rsp->hdr.Status = STATUS_FILE_CLOSED; smb2_set_err_rsp(work); return 0; } in_work = ksmbd_alloc_work_struct(); if (!in_work || allocate_interim_rsp_buf(in_work)) { if (in_work) ksmbd_free_work_struct(in_work); ksmbd_fd_put(work, fp); rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; smb2_set_err_rsp(work); return 0; } /* * in_work is synthetic (not from the normal request-receiving * pipeline), so it has no request_buf of its own. It gets registered * into conn->async_requests below, and smb2_cancel() unconditionally * computes smb_get_msg(iter->request_buf) for every entry in that * list while searching for a match -- give it its own small buffer * (not an alias of response_buf: ksmbd_free_work_struct() kvfree()s * both separately, so aliasing them would double-free) so that stays * a harmless read instead of a near-NULL dereference. */ in_work->request_buf = kzalloc(MAX_CIFS_SMALL_BUFFER_SIZE, KSMBD_DEFAULT_GFP); if (!in_work->request_buf) { ksmbd_free_work_struct(in_work); ksmbd_fd_put(work, fp); rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; smb2_set_err_rsp(work); return 0; } memcpy(smb_get_msg(in_work->request_buf), req, __SMB2_HEADER_STRUCTURE_SIZE); if (setup_async_work(work, NULL, NULL)) { ksmbd_free_work_struct(in_work); ksmbd_fd_put(work, fp); rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; smb2_set_err_rsp(work); return 0; } smb2_send_interim_resp(work, STATUS_PENDING); /* Keep the async IDA alive until the deferred work is released. */ in_work->conn = ksmbd_conn_get(work->conn); in_work->owns_conn_ref = true; in_work->encrypted = work->encrypted; in_hdr = smb_get_msg(in_work->response_buf); memcpy(in_hdr, ksmbd_resp_buf_next(work), __SMB2_HEADER_STRUCTURE_SIZE); in_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; in_hdr->Id.AsyncId = cpu_to_le64(work->async_id); smb2_set_err_rsp(in_work); in_hdr->Status = STATUS_NOTIFY_CLEANUP; /* * Transfer ownership of the async id to in_work; it stays reserved * until in_work is freed after the deferred response is sent on * close, so it can't be reused for an unrelated async response. */ in_work->async_id = work->async_id; work->async_id = 0; release_async_work(work); /* * work itself is about to be recycled by the normal request-processing * pipeline, so it can't stay the target of a future CANCEL -- register * in_work instead, reusing the same async_id, so a client-sent CANCEL * for this notify actually finds something to cancel instead of * silently doing nothing until the handle eventually closes. */ in_work->asynchronous = true; in_work->cancel_argv = kmalloc_array(2, sizeof(void *), KSMBD_DEFAULT_GFP); if (in_work->cancel_argv) { in_work->cancel_argv[0] = in_work; in_work->cancel_argv[1] = fp; in_work->cancel_fn = smb2_notify_cancel_fn; } if (!ksmbd_conn_link_async_request(work->conn, in_work)) { kfree(in_work->cancel_argv); in_work->cancel_argv = NULL; in_work->cancel_fn = NULL; in_work->asynchronous = false; ksmbd_fd_put(work, fp); if (smb2_send_interim_work(in_work, work, false)) ksmbd_debug(SMB, "failed to send notify cleanup\n"); ksmbd_free_work_struct(in_work); work->send_no_response = 1; return 0; } spin_lock(&fp->f_lock); list_add_tail(&in_work->notify_entry, &fp->notify_pendings); spin_unlock(&fp->f_lock); ksmbd_fd_put(work, fp); work->send_no_response = 1; return 0; } /** * smb2_is_sign_req() - handler for checking packet signing status * @work: smb work containing notify command buffer * @command: SMB2 command id * * Return: true if packed is signed, false otherwise */ bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) { struct smb2_hdr *rcv_hdr2 = smb_get_msg(work->request_buf); if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && command != SMB2_NEGOTIATE_HE) return true; return false; } /** * smb2_check_sign_req() - handler for req packet sign processing * @work: smb work containing notify command buffer * * Return: 1 on success, 0 otherwise */ int smb2_check_sign_req(struct ksmbd_work *work) { struct smb2_hdr *hdr; char signature_req[SMB2_SIGNATURE_SIZE]; char signature[SMB2_HMACSHA256_SIZE]; struct kvec iov[1]; size_t len; hdr = smb_get_msg(work->request_buf); if (work->next_smb2_rcv_hdr_off) hdr = ksmbd_req_buf_next(work); if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) len = get_rfc1002_len(work->request_buf); else if (hdr->NextCommand) len = le32_to_cpu(hdr->NextCommand); else len = get_rfc1002_len(work->request_buf) - work->next_smb2_rcv_hdr_off; memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); iov[0].iov_base = (char *)&hdr->ProtocolId; iov[0].iov_len = len; ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, signature); if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { pr_err("bad smb2 signature\n"); return 0; } return 1; } /** * smb2_get_sign_rsp_iov() - get the iovecs used to sign a response * @work: work that has the response iovecs * @hdr: SMB2 header of the response * @n_vec: set to the number of iovecs to sign * * Response data may be in another buffer. In this case, the response uses * more than one iovec. Find the iovec that starts with @hdr. Sign this * iovec and all iovecs after it. * * Return: The first iovec to sign. */ static struct kvec *smb2_get_sign_rsp_iov(struct ksmbd_work *work, struct smb2_hdr *hdr, int *n_vec) { int i; /* * iov[0] has the RFC1002 message length. It is not part of the SMB2 * message, so do not sign it. */ for (i = 1; i <= work->iov_idx; i++) { if (work->iov[i].iov_base == hdr) { *n_vec = work->iov_idx - i + 1; return &work->iov[i]; } } WARN_ON_ONCE(1); *n_vec = 1; return &work->iov[work->iov_idx]; } /** * smb2_set_sign_rsp() - handler for rsp packet sign processing * @work: smb work containing notify command buffer * */ void smb2_set_sign_rsp(struct ksmbd_work *work) { struct smb2_hdr *hdr; char signature[SMB2_HMACSHA256_SIZE]; struct kvec *iov; int n_vec; hdr = ksmbd_resp_buf_curr(work); hdr->Flags |= SMB2_FLAGS_SIGNED; memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); iov = smb2_get_sign_rsp_iov(work, hdr, &n_vec); ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, signature); memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); } /** * smb3_check_sign_req() - handler for req packet sign processing * @work: smb work containing notify command buffer * * Return: 1 on success, 0 otherwise */ int smb3_check_sign_req(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; char *signing_key; struct smb2_hdr *hdr; struct channel *chann; char signature_req[SMB2_SIGNATURE_SIZE]; char signature[SMB2_CMACAES_SIZE]; struct kvec iov[1]; size_t len; hdr = smb_get_msg(work->request_buf); if (work->next_smb2_rcv_hdr_off) hdr = ksmbd_req_buf_next(work); if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) len = get_rfc1002_len(work->request_buf); else if (hdr->NextCommand) len = le32_to_cpu(hdr->NextCommand); else len = get_rfc1002_len(work->request_buf) - work->next_smb2_rcv_hdr_off; if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { signing_key = work->sess->smb3signingkey; } else { chann = lookup_chann_list(work->sess, conn); if (!chann) { if (le16_to_cpu(hdr->Command) != SMB2_SESSION_SETUP_HE || !(hdr->Flags & SMB2_FLAGS_SIGNED)) return 0; signing_key = work->sess->smb3signingkey; } else { signing_key = chann->smb3signingkey; } } if (!signing_key) { pr_err("SMB3 signing key is not generated\n"); return 0; } memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); iov[0].iov_base = (char *)&hdr->ProtocolId; iov[0].iov_len = len; ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature); if (crypto_memneq(signature, signature_req, SMB2_SIGNATURE_SIZE)) { pr_err("bad smb2 signature\n"); return 0; } return 1; } /** * smb3_set_sign_rsp() - handler for rsp packet sign processing * @work: smb work containing notify command buffer * */ void smb3_set_sign_rsp(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_hdr *hdr; struct channel *chann; char signature[SMB2_CMACAES_SIZE]; struct kvec *iov; u16 command = conn->ops->get_cmd_val(work); int n_vec; char *signing_key; hdr = ksmbd_resp_buf_curr(work); if (command == SMB2_SESSION_SETUP_HE && (!conn->binding || hdr->Status != STATUS_SUCCESS)) { signing_key = work->sess->smb3signingkey; } else { chann = lookup_chann_list(work->sess, work->conn); if (!chann) { return; } signing_key = chann->smb3signingkey; } if (!signing_key) return; hdr->Flags |= SMB2_FLAGS_SIGNED; memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); iov = smb2_get_sign_rsp_iov(work, hdr, &n_vec); ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature); memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); } /** * smb3_preauth_hash_rsp() - handler for computing preauth hash on response * @work: smb work containing response buffer * */ void smb3_preauth_hash_rsp(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct smb2_hdr *req, *rsp; if (conn->dialect != SMB311_PROT_ID) return; WORK_BUFFERS(work, req, rsp); if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE) { ksmbd_conn_lock(conn); if (conn->preauth_info) ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, conn->preauth_info->Preauth_HashValue); ksmbd_conn_unlock(conn); } if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { ksmbd_conn_lock(conn); if (conn->binding) { struct preauth_session *preauth_sess; preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); if (preauth_sess) ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, preauth_sess->Preauth_HashValue); } else if (sess->Preauth_HashValue) { ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, sess->Preauth_HashValue); } ksmbd_conn_unlock(conn); } } static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) { struct smb2_transform_hdr *tr_hdr = tr_buf + 4; struct smb2_hdr *hdr = smb_get_msg(old_buf); unsigned int orig_len = get_rfc1002_len(old_buf); /* tr_buf must be cleared by the caller */ tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || cipher_type == SMB2_ENCRYPTION_AES256_GCM) get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); else get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); inc_rfc1001_len(tr_buf, orig_len); } int smb3_encrypt_resp(struct ksmbd_work *work) { struct kvec *iov = work->iov; int rc = -ENOMEM; void *tr_buf; tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, KSMBD_DEFAULT_GFP); if (!tr_buf) return rc; /* fill transform header */ fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); iov[0].iov_base = tr_buf; iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; work->tr_buf = tr_buf; return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); } bool smb3_is_transform_hdr(void *buf) { struct smb2_transform_hdr *trhdr = smb_get_msg(buf); return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; } int smb3_decrypt_req(struct ksmbd_work *work) { char *buf = work->request_buf; unsigned int pdu_length = get_rfc1002_len(buf); struct kvec iov[2]; unsigned int buf_data_size; struct smb2_transform_hdr *tr_hdr = smb_get_msg(buf); unsigned int original_msg_size; int rc = 0; if (pdu_length < sizeof(struct smb2_transform_hdr)) { pr_err("Transform message is too small (%u)\n", pdu_length); return -ECONNABORTED; } buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); original_msg_size = le32_to_cpu(tr_hdr->OriginalMessageSize); if (buf_data_size < sizeof(struct smb2_compression_hdr) || original_msg_size < sizeof(struct smb2_compression_hdr)) { pr_err("Transform message is too small (%u)\n", pdu_length); return -ECONNABORTED; } if (buf_data_size < original_msg_size) { pr_err("Transform message is broken\n"); return -ECONNABORTED; } iov[0].iov_base = buf; iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; iov[1].iov_len = buf_data_size; rc = ksmbd_crypt_message(work, iov, 2, 0); if (rc) return rc; /* Drop the AEAD authentication tag from the inner RFC1002 frame. */ memmove(buf + 4, iov[1].iov_base, original_msg_size); *(__be32 *)buf = cpu_to_be32(original_msg_size); return rc; } bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct smb2_hdr *rsp = smb_get_msg(work->response_buf); if (conn->dialect < SMB30_PROT_ID) return false; if (work->next_smb2_rcv_hdr_off) rsp = ksmbd_resp_buf_next(work); if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess->user && !user_guest(sess->user) && rsp->Status == STATUS_SUCCESS) return true; return false; }