summaryrefslogtreecommitdiffstats
path: root/fs/f2fs/hash.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/f2fs/hash.c')
-rw-r--r--fs/f2fs/hash.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/fs/f2fs/hash.c b/fs/f2fs/hash.c
index a60f04200f8b..6eb8d269b53b 100644
--- a/fs/f2fs/hash.c
+++ b/fs/f2fs/hash.c
@@ -42,7 +42,7 @@ static void TEA_transform(unsigned int buf[4], unsigned int const in[])
buf[1] += b1;
}
-static void str2hashbuf(const char *msg, int len, unsigned int *buf, int num)
+static void str2hashbuf(const char *msg, size_t len, unsigned int *buf, int num)
{
unsigned pad, val;
int i;
@@ -69,13 +69,17 @@ static void str2hashbuf(const char *msg, int len, unsigned int *buf, int num)
*buf++ = pad;
}
-f2fs_hash_t f2fs_dentry_hash(const char *name, int len)
+f2fs_hash_t f2fs_dentry_hash(const char *name, size_t len)
{
- __u32 hash, minor_hash;
+ __u32 hash;
f2fs_hash_t f2fs_hash;
const char *p;
__u32 in[8], buf[4];
+ if ((len <= 2) && (name[0] == '.') &&
+ (name[1] == '.' || name[1] == '\0'))
+ return 0;
+
/* Initialize the default seed for the hash checksum functions */
buf[0] = 0x67452301;
buf[1] = 0xefcdab89;
@@ -83,15 +87,15 @@ f2fs_hash_t f2fs_dentry_hash(const char *name, int len)
buf[3] = 0x10325476;
p = name;
- while (len > 0) {
+ while (1) {
str2hashbuf(p, len, in, 4);
TEA_transform(buf, in);
- len -= 16;
p += 16;
+ if (len <= 16)
+ break;
+ len -= 16;
}
hash = buf[0];
- minor_hash = buf[1];
-
f2fs_hash = cpu_to_le32(hash & ~F2FS_HASH_COL_BIT);
return f2fs_hash;
}