commit 49f9a0fafd844c32f2abada047c0b9a5ba0d6255
author Trond Myklebust <Trond.Myklebust@netapp.com> Fri Mar 15 16:44:28 2013 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> Mon Mar 25 12:04:11 2013 -0400
tree 6d9e04bc2b73c16dfefa58362cfa3d5e200cddb2
parent d9fc6619ca98943d56d2931ce9e4caa4039fd0f1

NFSv4.1: Enable open-by-filehandle

Sometimes, we actually _want_ to do open-by-filehandle, for instance
when recovering opens after a network partition, or when called
from nfs4_file_open.
Enable that functionality using a new capability NFS_CAP_ATOMIC_OPEN_V1,
and which is only enabled for NFSv4.1 servers that support it.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/dir.c

diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index f23f455..e093e73 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1486,6 +1486,8 @@
 		goto no_open;
 	if (d_mountpoint(dentry))
 		goto no_open;
+	if (NFS_SB(dentry->d_sb)->caps & NFS_CAP_ATOMIC_OPEN_V1)
+		goto no_open;
 
 	inode = dentry->d_inode;
 	parent = dget_parent(dentry);