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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-10-02 12:54:39 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-10-09 17:19:58 -0400 |
| commit | f2c77f4e62a2290ae46b5b0449eb72d72afe691e (patch) | |
| tree | f0b68a5be10fdebf477c3b5af1dbdce3a6150301 /fs/nfs | |
| parent | 6d2b2966869142660f46d1e06cf9d15c3debcf77 (diff) | |
| download | blackbird-obmc-linux-f2c77f4e62a2290ae46b5b0449eb72d72afe691e.tar.gz blackbird-obmc-linux-f2c77f4e62a2290ae46b5b0449eb72d72afe691e.zip | |
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')
| -rw-r--r-- | fs/nfs/dir.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 34da48586829..cf80cf234e27 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; |
