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authorTrond Myklebust <Trond.Myklebust@netapp.com>2007-10-02 12:54:39 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2007-10-09 17:19:58 -0400
commitf2c77f4e62a2290ae46b5b0449eb72d72afe691e (patch)
treef0b68a5be10fdebf477c3b5af1dbdce3a6150301 /fs/nfs/dir.c
parent6d2b2966869142660f46d1e06cf9d15c3debcf77 (diff)
NFS: Optimise nfs_lookup_revalidate()
We don't need to call nfs_revalidate_inode() on the directory if we already know that the verifiers don't match. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/dir.c')
-rw-r--r--fs/nfs/dir.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 34da4858682..cf80cf234e2 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -646,9 +646,14 @@ static int nfs_check_verifier(struct inode *dir, struct dentry *dentry)
{
if (IS_ROOT(dentry))
return 1;
- if (nfs_verify_change_attribute(dir, dentry->d_time))
- return 1;
- return 0;
+ if (!nfs_verify_change_attribute(dir, dentry->d_time))
+ return 0;
+ /* Revalidate nfsi->cache_change_attribute before we declare a match */
+ if (nfs_revalidate_inode(NFS_SERVER(dir), dir) < 0)
+ return 0;
+ if (!nfs_verify_change_attribute(dir, dentry->d_time))
+ return 0;
+ return 1;
}
static inline void nfs_set_verifier(struct dentry * dentry, unsigned long verf)
@@ -742,10 +747,6 @@ static int nfs_lookup_revalidate(struct dentry * dentry, struct nameidata *nd)
nfs_inc_stats(dir, NFSIOS_DENTRYREVALIDATE);
inode = dentry->d_inode;
- /* Revalidate parent directory attribute cache */
- if (nfs_revalidate_inode(NFS_SERVER(dir), dir) < 0)
- goto out_zap_parent;
-
if (!inode) {
if (nfs_neg_need_reval(dir, dentry, nd))
goto out_bad;