kernel/git/next/linux-next.git/fs/f2fs/node.c, branch master

f2fs: parameterize block size and mask macros

2026-09-04T16:19:21+00:00

Block size constants, shift counts, masks, and page-to-block ratios were globally defined assuming a fixed 4KB block size. Parameterize F2FS_BLKSIZE, F2FS_BLKSIZE_BITS, F2FS_BLKSIZE_MASK, F2FS_BLKS_PER_PAGE, and CP_CHKSUM_OFFSET with struct f2fs_sb_info *sbi to reference sbi->blocksize, sbi->log_blocksize, and runtime masks. Update call sites across metadata operations, data I/O, file operations, garbage collection, inline data, and sysfs information. Signed-off-by: Kelvin Zhang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: describe node tree geometry dynamically

2026-09-04T16:19:04+00:00

The file indexing tree boundaries separating direct, indirect, and double-indirect node blocks depend on the number of data block addresses and node IDs contained in each node block. Parameterize index boundary macros (NODE_DIR1_BLOCK, NODE_DIR2_BLOCK, NODE_IND1_BLOCK, NODE_IND2_BLOCK, and NODE_DIND_BLOCK) and address capacity helpers (DEF_ADDRS_PER_BLOCK, NIDS_PER_BLOCK, cur_addrs_per_inode, addrs_per_page, and addrs_per_folio) with struct f2fs_sb_info *sbi. Update file mapping, block allocation, truncate, garbage collection, and recovery paths to compute indexing tree offsets from the runtime geometry. Signed-off-by: Kelvin Zhang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: parameterize byte and block conversion macros

2026-09-04T16:18:43+00:00

Byte-to-block and block-to-byte conversion helpers previously relied on global PAGE_SIZE, PAGE_SHIFT, or F2FS_BLKSIZE_BITS. Parameterize F2FS_BYTES_TO_BLK, F2FS_BLK_TO_BYTES, F2FS_BLK_END_BYTES, F2FS_BLK_ALIGN, and max_file_blocks with struct f2fs_sb_info *sbi using sbi->log_blocksize. Update all call sites across data mapping, file operations, fiemap queries, fsverity checks, NAT bitmap allocations, and truncate paths. Signed-off-by: Kelvin Zhang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: describe xattr block layout dynamically

2026-09-04T16:17:59+00:00

The usable capacity of dedicated on-disk extended attribute blocks and inline xattr regions scales with the filesystem block size. Parameterize VALID_XATTR_BLOCK_SIZE and MAX_INLINE_XATTR_SIZE to calculate usable xattr limits dynamically from sbi->blocksize rather than hardcoding PAGE_SIZE or DEF_ADDRS_PER_INODE. Update mount option consistency validation for inline_xattr_size to evaluate allowed boundaries dynamically against the runtime block size. Signed-off-by: Kelvin Zhang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: describe {i,d,id}node block layout dynamically

2026-09-04T16:17:23+00:00

An inode block ends with five i_nid entries followed by a node footer. Data block address pointers (i_addr[]) precede them. Similarly, direct and indirect node blocks contain data addresses or node IDs followed by a node footer at the end of the block. Describe struct f2fs_inode, struct direct_node, and struct indirect_node using flexible array members. Compute the locations of i_nid and node footers dynamically from the filesystem block size. Introduce F2FS_INODE_NIDS() and F2FS_NODE_FOOTER() helpers to access these tail fields. Compute sbi->addrs_per_inode, sbi->addrs_per_block, and sbi->nids_per_block in init_sb_info(), and update node management, file mapping, and recovery paths accordingly. Signed-off-by: Kelvin Zhang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: describe NAT block layout dynamically

2026-09-04T16:14:28+00:00

A NAT block is a filesystem-block-sized array of struct f2fs_nat_entry elements. The compile-time NAT_ENTRY_PER_BLOCK definition hardcodes the NAT capacity to a 4KB block size. Replace the fixed array in struct f2fs_nat_block with a C flexible array member, and calculate sbi->nat_entries_per_block dynamically in init_sb_info(). Parameterize NAT geometry helpers (NAT_ENTRY_PER_BLOCK, NAT_BLOCK_OFFSET, f2fs_start_nid, NAT_BLK_CNT, and f2fs_nat_bitmap_size) with sbi. Update call sites across node management, checkpointing, GC, and sysfs. This is a layout-only change without behavioral differences for 4KB blocks. Signed-off-by: Kelvin Zhang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix to avoid potential deadloop in f2fs_fsync_node_pages()

2026-08-25T02:04:36+00:00

There is potential deadloop in race condition: Thread A Thread B - fsync - f2fs_do_sync_file - f2fs_fsync_node_pages - last_fsync_dnode - folio_get(last_folio) - f2fs_setattr - f2fs_truncate - f2fs_truncate_blocks - f2fs_do_truncate_blocks - f2fs_truncate_inode_blocks - truncate_dnode - truncate_node - invalidate_mapping_pages - folio->mapping = NULL - is_node_folio alwasy return false - atomic && !marked is always true, then goto retry Cc: stable@kernel.org Fixes: 608514deba38 ("f2fs: set fsync mark only for the last dnode") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: use f2fs_{down, up}_(read, write}_trace() for nat_tree_lock

2026-08-21T23:42:31+00:00

Under heavy workloads or during background GC/fallocate operations, nat_tree_lock can experience high lock contention between background readers (e.g. f2fs_get_node_info() in gc_data_segment) and writers (e.g. flush_nat_entries, set_node_addr, shrinker). [375067.327986][T13777] schedule+0x4c/0x114 [375067.327997][T13777] f2fs_get_node_info+0x438/0x5c4 [375067.328002][T13777] f2fs_get_inode_page+0x1e0/0x3f0 [375067.328013][T13777] f2fs_iget+0x88/0x1180 [375067.328024][T13777] f2fs_lookup+0x168/0x3a8 [375067.328035][T13777] path_openat+0xa28/0x1b04 [375067.328046][T13777] do_filp_open+0xac/0x130 [375067.328056][T13777] do_sys_openat2+0x140/0x21c [375067.328066][T13777] __arm64_sys_openat+0x70/0x9c [375067.330299][T13777] schedule+0x4c/0x114 [375067.330310][T13777] schedule_preempt_disabled+0x24/0x40 [375067.330321][T13777] rwsem_down_write_slowpath+0x3b4/0x9d0 [375067.330332][T13777] down_write+0x98/0x170 [375067.330343][T13777] set_node_addr+0x74/0x4b4 [375067.330354][T13777] f2fs_new_node_page+0xb0/0x280 [375067.330444][T13777] f2fs_new_inode_page+0x3c/0x64 [375067.330455][T13777] f2fs_init_inode_metadata+0x4c/0x47c [375067.330461][T13777] f2fs_add_regular_entry+0x258/0x5b8 [375067.330471][T13777] f2fs_add_dentry+0x100/0x158 [375067.330476][T13777] f2fs_do_add_link+0x84/0x140 [375067.330487][T13777] f2fs_create+0xec/0x250 [375067.331759][T13777] schedule+0x4c/0x114 [375067.331770][T13777] f2fs_down_read+0x9c/0xc4 [375067.331781][T13777] f2fs_need_inode_block_update+0x20/0x10c [375067.331792][T13777] f2fs_do_sync_file+0x478/0x830 [375067.331802][T13777] f2fs_sync_file+0x2c/0x40 This patch converts nat_tree_lock to use the f2fs_{down,up}_{read,write}_trace infrastructure. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix to pass folio->index to f2fs_sanity_check_node_footer()

2026-08-07T23:00:44+00:00

Otherwise in f2fs_sanity_check_node_footer(), it will check the same nid incorrectly. Cc: stable@kernel.org Fixes: 0a736109c9d2 ("f2fs: fix to do sanity check on node footer in __write_node_folio()") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: fix to clear dirty flag on folio in error path

2026-08-05T21:20:15+00:00

If node block is corrupted due to chksum mismatch or inconsistent footer info, it needs to drop clear flag of node folio, in order to persist inconsistent node data to storage. Cc: stable@kernel.org Fixes: b42b179bda9f ("f2fs: fix to do checksum even if inode page is uptodate") Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim