From: Nagendra S Tomar <natomar@xxxxxxxxxxxxx>
If NFS_INO_INVALID_DATA cache_validity flag is set, a subsequent call
to nfs_invalidate_mapping() does the following two things:
1. Clears mapping.
2. Resets cookieverf to 0, if inode refers to a directory.
If there are no mapped pages, we don't need #1, but we still need #2.
Signed-off-by: Nagendra S Tomar <natomar@xxxxxxxxxxxxx>
---
fs/nfs/inode.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index aa6493905bbe..40f2bfaa4e46 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -209,8 +209,13 @@ static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
| NFS_INO_INVALID_XATTR);
}
- if (inode->i_mapping->nrpages == 0)
+ if (inode->i_mapping->nrpages == 0) {
+ if (S_ISDIR(inode->i_mode) &&
+ (flags & (NFS_INO_INVALID_DATA | NFS_INO_DATA_INVAL_DEFER)))
+ memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
flags &= ~(NFS_INO_INVALID_DATA|NFS_INO_DATA_INVAL_DEFER);
+ }
+
nfsi->cache_validity |= flags;
if (flags & NFS_INO_INVALID_DATA)
nfs_fscache_invalidate(inode);
