kernel/git/stable/linux.git/fs/smb/server/proc.c, branch master

smb/server: abort initialization when proc setup fails

2026-08-17T06:00:58+00:00

ksmbd_server_init() calls ksmbd_proc_init() before creating the remaining proc entries and server subsystems. ksmbd_proc_init() tears down partial state on a procfs or percpu_counter allocation failure, but returns void, so ksmbd_server_init() continues as if the counters were usable. Once userspace starts the server, server_ctrl_handle_init() calls ksmbd_proc_reset(), which reaches percpu_counter_set() with a NULL per-CPU counters pointer on SMP systems. The later ksmbd_proc_create() calls also receive a NULL parent and may create entries in the /proc root; ksmbd_proc_cleanup() cannot remove those entries because ksmbd_proc_fs is NULL. Fixes: b38f99c1217a ("ksmbd: add procfs interface for runtime monitoring and statistics") Signed-off-by: ZhangGuoDong Reviewed-by: ChenXiaoSong Signed-off-by: Namjae Jeon

ksmbd: extend procfs server statistics

2026-08-17T06:00:48+00:00

The server proc entry does not expose configured limits or enough outcome data to distinguish protocol errors from transport stalls. Report the server state, listener and signing configuration, connection limits, timeout values, current client and open-file totals, IPC activity, and durable scavenger state. Classify processed SMB2 response statuses by NTSTATUS severity and provide counters for common error groups while retaining the per-command counters. Signed-off-by: Namjae Jeon

ksmbd: fix malformed procfs status output

2026-08-17T06:00:47+00:00

The ksmbd procfs monitoring files produce misleading or malformed output. The constant-name helper uses a bitwise test for enum values. This omits zero-valued constants and can print multiple names for one lease state. It also unconditionally emits a newline, splitting entries in the open-file table across two lines. Session capabilities are printed as numeric flag values even though a table of descriptive names is available. Use exact matching for enum values. Print flag names as a comma-separated list, preserving unknown bits as hexadecimal values. Let callers control line termination so each open-file entry remains on one line. Print common session properties once, and report signing and encryption independently. Adjust client and open-file column widths for IPv6 addresses and 64-bit file IDs, and fix the misspelled OPLOCK_EXCLUSIVE name. Also expose and maintain the total request count alongside the per-command counters. Signed-off-by: Namjae Jeon

ksmbd: add procfs interface for runtime monitoring and statistics

2026-02-09T02:25:16+00:00

This patch introduces a /proc filesystem interface to ksmbd, providing visibility into the internal state of the SMB server. This allows administrators and developers to monitor active connections, user sessions, and opened files in real-time without relying on external tools or heavy debugging. Key changes include: - Connection Monitoring (/proc/fs/ksmbd/clients): Displays a list of active network connections, including client IP addresses, SMB dialects, credits, and last active timestamps. - Session Management (/proc/fs/ksmbd/sessions/): Adds a global sessions file to list all authenticated users and their session IDs. - Creates individual session entries (e.g., /proc/fs/ksmbd/sessions/) detailing capabilities (DFS, Multi-channel, etc.), signing/encryption algorithms, and connected tree shares. - File Tracking (/proc/fs/ksmbd/files): Shows all currently opened files across the server, including tree IDs, process IDs (PID), access modes (daccess/saccess), and oplock/lease states. - Statistics & Counters: Implements internal counters for global server metrics, such as the number of tree connections, total sessions, and processed read/write bytes. Signed-off-by: Hyunchul Lee Signed-off-by: Bahubali B Gumaji Signed-off-by: Sang-Soo Lee Signed-off-by: Namjae Jeon Signed-off-by: Steve French