pNFS: Actively set attributes as invalid if LAYOUTCOMMIT is outstanding

A LAYOUTCOMMIT then subsequent GETATTR may both return the same attributes,
and in that case NFS_INO_INVALID_ATTR is never set on the second pass
through nfs_update_inode().  The existing check to skip the clearing of
NFS_INO_INVALID_ATTR if a LAYOUTCOMMIT is outstanding does not help in this
case (see commit 10b7e9ad4488: "pNFS: Don't mark the inode as revalidated
if a LAYOUTCOMMIT is outstanding").  We know that if a LAYOUTCOMMIT is
outstanding then attributes will need upating, so always set
NFS_INO_INVALID_ATTR.

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index f108d58101f8..bf4ec5ecc97e 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1665,7 +1665,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
         unsigned long now = jiffies;
         unsigned long save_cache_validity;
         bool have_writers = nfs_file_has_buffered_writers(nfsi);
-        bool cache_revalidated;
+        bool cache_revalidated = true;
 
         dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
                         __func__, inode->i_sb->s_id, inode->i_ino,
@@ -1714,8 +1714,10 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
         /* Do atomic weak cache consistency updates */
         invalid |= nfs_wcc_update_inode(inode, fattr);
 
-
-        cache_revalidated = !pnfs_layoutcommit_outstanding(inode);
+        if (pnfs_layoutcommit_outstanding(inode)) {
+                nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR;
+                cache_revalidated = false;
+        }
 
         /* More cache consistency checks */
         if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {