[PATCH] SYSV fs: test in sysv_hash() is backwards

René Scharfe (l.s.r@web.de)
Sat, 24 May 2003 13:32:13 +0200


Hi all,

it seems sysvfs will compute a filename hash only in the case where
that name is too long.

After applying the patch below it will always update the hash, and
truncate too-long filenames beforehand. Also use full_name_hash() to
simplify the code.

René

--- linux/fs/sysv/namei.c.orig 2003-05-24 12:49:57.000000000 +0200
+++ linux/fs/sysv/namei.c 2003-05-24 13:08:45.000000000 +0200
@@ -42,21 +42,11 @@

static int sysv_hash(struct dentry *dentry, struct qstr *qstr)
{
- unsigned long hash;
- int i;
- const unsigned char *name;
-
- i = SYSV_NAMELEN;
- if (i >= qstr->len)
- return 0;
/* Truncate the name in place, avoids having to define a compare
function. */
- qstr->len = i;
- name = qstr->name;
- hash = init_name_hash();
- while (i--)
- hash = partial_name_hash(*name++, hash);
- qstr->hash = end_name_hash(hash);
+ if (qstr->len > SYSV_NAMELEN)
+ qstr->len = SYSV_NAMELEN;
+ qstr->hash = full_name_hash(qstr->name, qstr->len);
return 0;
}

-
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