NFSv4: Don't ignore the NFS_INO_REVAL_FORCED flag in nfs_revalidate_inode()

If the NFS_INO_REVAL_FORCED flag is set, that means that we don't yet have
an up to date attribute cache. Even if we hold a delegation, we must
put a GETATTR on the wire.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org

3 files changed, 8 insertions, 2 deletions

diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index 944b627..69e7b814 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -71,4 +71,10 @@ static inline int nfs_inode_return_delegation(struct inode *inode)
 }
 #endif
 
+static inline int nfs_have_delegated_attributes(struct inode *inode)
+{
+	return nfs_have_delegation(inode, FMODE_READ) &&
+		!(NFS_I(inode)->cache_validity & NFS_INO_REVAL_FORCED);
+}
+
 #endif
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index a1f6b44..c6f2750 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1789,7 +1789,7 @@ static int nfs_access_get_cached(struct inode *inode, struct rpc_cred *cred, str
 	cache = nfs_access_search_rbtree(inode, cred);
 	if (cache == NULL)
 		goto out;
-	if (!nfs_have_delegation(inode, FMODE_READ) &&
+	if (!nfs_have_delegated_attributes(inode) &&
 	    !time_in_range_open(jiffies, cache->jiffies, cache->jiffies + nfsi->attrtimeo))
 		goto out_stale;
 	res->jiffies = cache->jiffies;
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 657201a..e358df7 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -729,7 +729,7 @@ int nfs_attribute_timeout(struct inode *inode)
 {
 	struct nfs_inode *nfsi = NFS_I(inode);
 
-	if (nfs_have_delegation(inode, FMODE_READ))
+	if (nfs_have_delegated_attributes(inode))
 		return 0;
 	return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
 }