diff options
Diffstat (limited to 'fs/ext4/hash.c')
| -rw-r--r-- | fs/ext4/hash.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c index 46b24da33a28..d358bfcb6b3f 100644 --- a/fs/ext4/hash.c +++ b/fs/ext4/hash.c @@ -6,6 +6,7 @@ */ #include <linux/fs.h> +#include <linux/unicode.h> #include <linux/compiler.h> #include <linux/bitops.h> #include "ext4.h" @@ -196,7 +197,8 @@ static void str2hashbuf_unsigned(const char *msg, int len, __u32 *buf, int num) * represented, and whether or not the returned hash is 32 bits or 64 * bits. 32 bit hashes will return 0 for the minor hash. */ -int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo) +static int __ext4fs_dirhash(const char *name, int len, + struct dx_hash_info *hinfo) { __u32 hash; __u32 minor_hash = 0; @@ -268,3 +270,33 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo) hinfo->minor_hash = minor_hash; return 0; } + +int ext4fs_dirhash(const struct inode *dir, const char *name, int len, + struct dx_hash_info *hinfo) +{ +#ifdef CONFIG_UNICODE + const struct unicode_map *um = EXT4_SB(dir->i_sb)->s_encoding; + int r, dlen; + unsigned char *buff; + struct qstr qstr = {.name = name, .len = len }; + + if (len && IS_CASEFOLDED(dir)) { + buff = kzalloc(sizeof(char) * PATH_MAX, GFP_KERNEL); + if (!buff) + return -ENOMEM; + + dlen = utf8_casefold(um, &qstr, buff, PATH_MAX); + if (dlen < 0) { + kfree(buff); + goto opaque_seq; + } + + r = __ext4fs_dirhash(buff, dlen, hinfo); + + kfree(buff); + return r; + } +opaque_seq: +#endif + return __ext4fs_dirhash(name, len, hinfo); +} |