NFS: Map minor mismatch error to protocol not support error.

Sservers that only have NFSv4.1 support the
NFS4ERR_MINOR_VERS_MISMATCH error is return on
v4.0 mounts. Mapping that error to EPROTONOSUPPORT
will cause the mount to back off to v3 instead of
failing.

Signed-off-by: Steve Dickson <steved@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 7c218fd..bfc919f 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -105,6 +105,8 @@ static int nfs4_map_errors(int err)
                return -EINVAL;
        case -NFS4ERR_SHARE_DENIED:
                return -EACCES;
+       case -NFS4ERR_MINOR_VERS_MISMATCH:
+               return -EPROTONOSUPPORT;
        default:
                dprintk("%s could not handle NFSv4 error %d\n",
                                __func__, -err);