diff options
| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-01-16 16:09:44 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2007-02-04 00:35:04 +0100 |
| commit | ef75c7974b383769ae5741cf930b8aa4dcaef395 (patch) | |
| tree | 4ed78762d171e41badb94c1bca93ae0be3e5af16 /fs/nfs | |
| parent | NFS: Fix a readdir/lookup inefficiency. (diff) | |
| download | linux-ef75c7974b383769ae5741cf930b8aa4dcaef395.tar.xz linux-ef75c7974b383769ae5741cf930b8aa4dcaef395.zip | |
NFS: Also use readdir info to revalidate positive dentries
If the fileid of the cached dentry fails to match that returned by
the readdir call, then we should also d_drop. Try to take into account the
fact that on NFSv4, readdir may return the "mounted_on_fileid" by looking
for submounts.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs')
| -rw-r--r-- | fs/nfs/dir.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index db29c7fa9620..062e108fac50 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1124,9 +1124,16 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc) name.hash = full_name_hash(name.name, name.len); dentry = d_lookup(parent, &name); if (dentry != NULL) { - /* Is this a positive dentry? */ - if (dentry->d_inode != NULL) - return dentry; + /* Is this a positive dentry that matches the readdir info? */ + if (dentry->d_inode != NULL && + (NFS_FILEID(dentry->d_inode) == entry->ino || + d_mountpoint(dentry))) { + if (!desc->plus || entry->fh->size == 0) + return dentry; + if (nfs_compare_fh(NFS_FH(dentry->d_inode), + entry->fh) == 0) + goto out_renew; + } /* No, so d_drop to allow one to be created */ d_drop(dentry); dput(dentry); @@ -1152,6 +1159,7 @@ static struct dentry *nfs_readdir_lookup(nfs_readdir_descriptor_t *desc) dentry = alias; } +out_renew: nfs_renew_times(dentry); nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); return dentry; |