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NFS: Kill fscache warnings when mounting without -ofsc

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The fscache code will currently bleat a "non-unique superblock keys"
warning even if the user is mounting without the 'fsc' option.

There should be no reason to even initialise the superblock cache cookie
unless we're planning on using fscache for something, so ensure that we
check for the NFS_OPTION_FSCACHE flag before calling into the fscache
code.

Reported-by: Paweł Sikora <pawel.sikora@agmk.net>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Trond Myklebust 2012-12-21 11:02:32 -05:00 committed by Linus Torvalds
parent c129c29347
commit c4271c6e37
1 changed files with 15 additions and 4 deletions
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19
fs/nfs/super.c
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@ -2375,19 +2375,30 @@ static void nfs_get_cache_cookie(struct super_block *sb,
struct nfs_parsed_mount_data *parsed,
struct nfs_clone_mount *cloned)
{
struct nfs_server *nfss = NFS_SB(sb);
char *uniq = NULL;
int ulen = 0;
if (parsed && parsed->fscache_uniq) {
uniq = parsed->fscache_uniq;
ulen = strlen(parsed->fscache_uniq);
nfss->fscache_key = NULL;
nfss->fscache = NULL;
if (parsed) {
if (!(parsed->options & NFS_OPTION_FSCACHE))
return;
if (parsed->fscache_uniq) {
uniq = parsed->fscache_uniq;
ulen = strlen(parsed->fscache_uniq);
}
} else if (cloned) {
struct nfs_server *mnt_s = NFS_SB(cloned->sb);
if (!(mnt_s->options & NFS_OPTION_FSCACHE))
return;
if (mnt_s->fscache_key) {
uniq = mnt_s->fscache_key->key.uniquifier;
ulen = mnt_s->fscache_key->key.uniq_len;
};
}
} else
return;
nfs_fscache_get_super_cookie(sb, uniq, ulen);
}