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authorTrond Myklebust <Trond.Myklebust@netapp.com>2010-04-16 16:42:46 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2010-05-14 15:09:30 -0400
commitd7cf8dd01289b3c64057e38d34c2857f6633d52c (patch)
tree600143a42314da064fc0b8dec236c85f2f45d16b /fs/nfs/file.c
parenta8ce4a8f37fef0a09a1e920c2e09f67a80426c7e (diff)
NFSv4: Allow attribute caching with 'noac' mounts if client holds a delegation
If the server has given us a delegation on a file, we _know_ that we can cache the attribute information even when the user has specified 'noac'. Reviewed-by: Chuck Lever <chuck.lever@oracle.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/file.c')
-rw-r--r--fs/nfs/file.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 8d965bddb87e..cac96bcc91e4 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -161,14 +161,17 @@ static int nfs_revalidate_file_size(struct inode *inode, struct file *filp)
struct nfs_server *server = NFS_SERVER(inode);
struct nfs_inode *nfsi = NFS_I(inode);
- if (server->flags & NFS_MOUNT_NOAC)
- goto force_reval;
+ if (nfs_have_delegated_attributes(inode))
+ goto out_noreval;
+
if (filp->f_flags & O_DIRECT)
goto force_reval;
- if (nfsi->npages != 0)
- return 0;
- if (!(nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) && !nfs_attribute_timeout(inode))
- return 0;
+ if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
+ goto force_reval;
+ if (nfs_attribute_timeout(inode))
+ goto force_reval;
+out_noreval:
+ return 0;
force_reval:
return __nfs_revalidate_inode(server, inode);
}