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f2fs: introduce dot and dotdot name check 

This patch adds an inline function to check dot and dotdot names.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
hifive-unleashed-5.1
Jaegeuk Kim 2015-04-26 00:15:29 -07:00
parent c879f90da9
commit eaa693f4dc
2 changed files with 12 additions and 2 deletions
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11
fs/f2fs/f2fs.h
View File

@ -1454,6 +1454,17 @@ static inline void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi)
sbi->sb->s_flags |= MS_RDONLY;
}
static inline bool is_dot_dotdot(const struct qstr *str)
{
if (str->len == 1 && str->name[0] == '.')
return true;
if (str->len == 2 && str->name[0] == '.' && str->name[1] == '.')
return true;
return false;
}
#define get_inode_mode(i) \
((is_inode_flag_set(F2FS_I(i), FI_ACL_MODE)) ? \
(F2FS_I(i)->i_acl_mode) : ((i)->i_mode))

3
fs/f2fs/hash.c
View File

@ -79,8 +79,7 @@ f2fs_hash_t f2fs_dentry_hash(const struct qstr *name_info)
const unsigned char *name = name_info->name;
size_t len = name_info->len;
if ((len <= 2) && (name[0] == '.') &&
(name[1] == '.' || name[1] == '\0'))
if (is_dot_dotdot(name_info))
return 0;
/* Initialize the default seed for the hash checksum functions */