diff options
| 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 /fs/f2fs | |
| parent | 632f0b6c3e32758e5c93d4e3c2860a3708b9853e (diff) | |
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 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/sysfs.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c index f736052dea50..82489c78aeda 100644 --- a/fs/f2fs/sysfs.c +++ b/fs/f2fs/sysfs.c @@ -281,6 +281,22 @@ static ssize_t encoding_flags_show(struct f2fs_attr *a, le16_to_cpu(F2FS_RAW_SUPER(sbi)->s_encoding_flags)); } +static ssize_t effective_lookup_mode_show(struct f2fs_attr *a, + struct f2fs_sb_info *sbi, char *buf) +{ + switch (F2FS_OPTION(sbi).lookup_mode) { + case LOOKUP_PERF: + return sysfs_emit(buf, "perf\n"); + case LOOKUP_COMPAT: + return sysfs_emit(buf, "compat\n"); + case LOOKUP_AUTO: + if (sb_no_casefold_compat_fallback(sbi->sb)) + return sysfs_emit(buf, "auto:perf\n"); + return sysfs_emit(buf, "auto:compat\n"); + } + return 0; +} + static ssize_t mounted_time_sec_show(struct f2fs_attr *a, struct f2fs_sb_info *sbi, char *buf) { @@ -1211,6 +1227,7 @@ F2FS_GENERAL_RO_ATTR(current_reserved_blocks); F2FS_GENERAL_RO_ATTR(unusable); F2FS_GENERAL_RO_ATTR(encoding); F2FS_GENERAL_RO_ATTR(encoding_flags); +F2FS_GENERAL_RO_ATTR(effective_lookup_mode); F2FS_GENERAL_RO_ATTR(mounted_time_sec); F2FS_GENERAL_RO_ATTR(main_blkaddr); F2FS_GENERAL_RO_ATTR(pending_discard); @@ -1329,6 +1346,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(current_reserved_blocks), ATTR_LIST(encoding), ATTR_LIST(encoding_flags), + ATTR_LIST(effective_lookup_mode), ATTR_LIST(mounted_time_sec), #ifdef CONFIG_F2FS_STAT_FS ATTR_LIST(cp_foreground_calls), |