[v2,1/3] NFSv4.1/pnfs: Don't ask for a read layout for an empty file.

Commit Message

Trond Myklebust Aug. 31, 2015, 9:08 a.m. UTC

Signed-off-by: Trond Myklebust <[e-mail]>
---
 fs/nfs/pnfs.c | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 4eec540de9ea..c4f918eca3d2 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1494,6 +1494,9 @@  pnfs_update_layout(struct inode *ino,
 	if (!pnfs_enabled_sb(NFS_SERVER(ino)))
 		goto out;
 
+	if (iomode == IOMODE_READ && i_size_read(ino) == 0)
+		goto out;
+
 	if (pnfs_within_mdsthreshold(ctx, ino, iomode))
 		goto out;