diff options
| author | Daniel Lee <chullee@google.com> | 2024-12-20 15:41:31 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2025-01-08 18:31:45 +0000 |
| commit | 91b587ba79e1b68bb718d12b0758dbcdab4e9cb7 (patch) | |
| tree | 35ca197d567c54d26370ff37475ed1852c09b2c5 /fs/f2fs/inline.c | |
| parent | d217b5cea488c0f644c189f91b636aeefa12deb9 (diff) | |
f2fs: Introduce linear search for dentries
This patch addresses an issue where some files in case-insensitive
directories become inaccessible due to changes in how the kernel function,
utf8_casefold(), generates case-folded strings from the commit 5c26d2f1d3f5
("unicode: Don't special case ignorable code points").
F2FS uses these case-folded names to calculate hash values for locating
dentries and stores them on disk. Since utf8_casefold() can produce
different output across kernel versions, stored hash values and newly
calculated hash values may differ. This results in affected files no
longer being found via the hash-based lookup.
To resolve this, the patch introduces a linear search fallback.
If the initial hash-based search fails, F2FS will sequentially scan the
directory entries.
Fixes: 5c26d2f1d3f5 ("unicode: Don't special case ignorable code points")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=219586
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/inline.c')
| -rw-r--r-- | fs/f2fs/inline.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c index cbd2a0d34804..3e3c35d4c98b 100644 --- a/fs/f2fs/inline.c +++ b/fs/f2fs/inline.c @@ -352,7 +352,8 @@ process_inline: struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir, const struct f2fs_filename *fname, - struct page **res_page) + struct page **res_page, + bool use_hash) { struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); struct f2fs_dir_entry *de; @@ -369,7 +370,7 @@ struct f2fs_dir_entry *f2fs_find_in_inline_dir(struct inode *dir, inline_dentry = inline_data_addr(dir, ipage); make_dentry_ptr_inline(dir, &d, inline_dentry); - de = f2fs_find_target_dentry(&d, fname, NULL); + de = f2fs_find_target_dentry(&d, fname, NULL, use_hash); unlock_page(ipage); if (IS_ERR(de)) { *res_page = ERR_CAST(de); |