NFS: Allow text-based mounts via compat_sys_mount
The compat_sys_mount() system call throws EINVAL for text-based NFSv4
mounts.
The text-based mount interface assumes that any mount option blob that
doesn't set the version field to "1" is a C string (ie not a legacy
mount request). The compat_sys_mount() call treats blobs that don't
set the version field to "1" as an error. We just relax the check in
compat_sys_mount() a bit to allow C strings to be passed down to the NFSv4
client.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/compat.c b/fs/compat.c
index ee80ff3..439292a 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -702,9 +702,6 @@
real->flags = raw->flags;
real->version = raw->version;
}
- else {
- return -EINVAL;
- }
return 0;
}