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f2fs: introduce f2fs_match_name() for cleanup 

This patch introduces f2fs_match_name() for cleanup.

BTW, it avoids to fallback to normal comparison once it doesn't
match casefolded name.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2019-08-21 23:13:34 +08:00 committed by Jaegeuk Kim
parent bbf9f7d90f
commit fe76a166a1
1 changed files with 30 additions and 19 deletions
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49
fs/f2fs/dir.c
View File

@ -136,6 +136,34 @@ int f2fs_ci_compare(const struct inode *parent, const struct qstr *name,
}
#endif
static inline bool f2fs_match_name(struct f2fs_dentry_ptr *d,
struct f2fs_dir_entry *de,
struct fscrypt_name *fname,
unsigned long bit_pos,
f2fs_hash_t namehash)
{
#ifdef CONFIG_UNICODE
struct inode *parent = d->inode;
struct f2fs_sb_info *sbi = F2FS_I_SB(parent);
struct qstr entry;
#endif
if (de->hash_code != namehash)
return false;
#ifdef CONFIG_UNICODE
entry.name = d->filename[bit_pos];
entry.len = de->name_len;
if (sbi->s_encoding && IS_CASEFOLDED(parent))
return !f2fs_ci_compare(parent, fname->usr_fname, &entry);
#endif
if (fscrypt_match_name(fname, d->filename[bit_pos],
le16_to_cpu(de->name_len)))
return true;
return false;
}
struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname,
f2fs_hash_t namehash, int *max_slots,
struct f2fs_dentry_ptr *d)
@ -143,9 +171,6 @@ struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname,
struct f2fs_dir_entry *de;
unsigned long bit_pos = 0;
int max_len = 0;
#ifdef CONFIG_UNICODE
struct qstr entry;
#endif
if (max_slots)
*max_slots = 0;
@ -157,28 +182,14 @@ struct f2fs_dir_entry *f2fs_find_target_dentry(struct fscrypt_name *fname,
}
de = &d->dentry[bit_pos];
#ifdef CONFIG_UNICODE
entry.name = d->filename[bit_pos];
entry.len = de->name_len;
#endif
if (unlikely(!de->name_len)) {
bit_pos++;
continue;
}
if (de->hash_code == namehash) {
#ifdef CONFIG_UNICODE
if (F2FS_SB(d->inode->i_sb)->s_encoding &&
IS_CASEFOLDED(d->inode) &&
!f2fs_ci_compare(d->inode,
fname->usr_fname, &entry))
goto found;
#endif
if (fscrypt_match_name(fname, d->filename[bit_pos],
le16_to_cpu(de->name_len)))
goto found;
}
if (f2fs_match_name(d, de, fname, bit_pos, namehash))
goto found;
if (max_slots && max_len > *max_slots)
*max_slots = max_len;