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| author | Daniel Lee <chullee@google.com> | 2025-08-04 23:52:27 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2025-08-11 17:03:53 +0000 |
| commit | 1bd119da0b93d6d61891edf2b9d036800aba687f (patch) | |
| tree | be6508188b447198f65db855294314e6c34eec43 /Documentation/ABI | |
| parent | 632f0b6c3e32758e5c93d4e3c2860a3708b9853e (diff) | |
| download | linux-next-1bd119da0b93d6d61891edf2b9d036800aba687f.tar.gz linux-next-1bd119da0b93d6d61891edf2b9d036800aba687f.zip | |
f2fs: add sysfs entry for effective lookup mode
This commit introduces a new read-only sysfs entry at
/sys/fs/f2fs/<device>/effective_lookup_mode.
This entry displays the actual directory lookup mode F2FS is
currently using. This is needed for debugging and verification,
as the behavior is determined by both on-disk flags and mount
options.
Signed-off-by: Daniel Lee <chullee@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index bc0e7fefc39d..ce189acd1908 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -883,3 +883,18 @@ Date: June 2025 Contact: "Daeho Jeong" <daehojeong@google.com> Description: Control GC algorithm for boost GC. 0: cost benefit, 1: greedy Default: 1 + +What: /sys/fs/f2fs/<disk>/effective_lookup_mode +Date: August 2025 +Contact: "Daniel Lee" <chullee@google.com> +Description: + This is a read-only entry to show the effective directory lookup mode + F2FS is currently using for casefolded directories. + This considers both the "lookup_mode" mount option and the on-disk + encoding flag, SB_ENC_NO_COMPAT_FALLBACK_FL. + + Possible values are: + - "perf": Hash-only lookup. + - "compat": Hash-based lookup with a linear search fallback enabled + - "auto:perf": lookup_mode is auto and fallback is disabled on-disk + - "auto:compat": lookup_mode is auto and fallback is enabled on-disk |