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-rw-r--r--fs/ext4/hash.c34
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);
+}