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| author | Kelvin Zhang <zhangxp1998@gmail.com> | 2026-09-03 16:56:15 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2026-09-14 15:21:46 +0000 |
| commit | d8ee1a56fe732a4a380a84c793370edc47bb501c (patch) | |
| tree | 69f53491e7ba01fa67fec806a034463f5dca7545 /include/linux | |
| parent | b13241d96b16648c0e2f110efb59df9c8e573df3 (diff) | |
| download | linux-next-d8ee1a56fe732a4a380a84c793370edc47bb501c.tar.gz linux-next-d8ee1a56fe732a4a380a84c793370edc47bb501c.zip | |
f2fs: describe NAT block layout dynamically
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 <zhangxp1998@gmail.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/f2fs_fs.h | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/include/linux/f2fs_fs.h b/include/linux/f2fs_fs.h index ecd6694af572..061f906a7b94 100644 --- a/include/linux/f2fs_fs.h +++ b/include/linux/f2fs_fs.h @@ -375,8 +375,6 @@ struct f2fs_node { /* * For NAT entries */ -#define NAT_ENTRY_PER_BLOCK (F2FS_BLKSIZE / sizeof(struct f2fs_nat_entry)) - struct f2fs_nat_entry { __u8 version; /* latest version of cached nat entry */ __le32 ino; /* inode number */ @@ -384,7 +382,8 @@ struct f2fs_nat_entry { } __packed; struct f2fs_nat_block { - struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK]; + /* The entry count depends on the filesystem block size. */ + DECLARE_FLEX_ARRAY(struct f2fs_nat_entry, entries); } __packed; /* |