NFS: don't negotiate when user specifies sec flavor

We were always attempting sec flavor negotiation, even if the user
told us a specific sec flavor to use.  If that sec flavor fails,
we should return an error rather than continuing with sec flavor
negotiation.

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

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 7e27ebf..b8e1ac6 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -46,6 +46,7 @@
 #include <linux/nfs4.h>
 #include <linux/nfs_fs.h>
 #include <linux/nfs_page.h>
+#include <linux/nfs_mount.h>
 #include <linux/namei.h>
 #include <linux/mount.h>
 #include <linux/module.h>
@@ -2234,7 +2235,7 @@ static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
                              struct nfs_fsinfo *info)
 {
        int status = nfs4_lookup_root(server, fhandle, info);
-       if (status == -EPERM)
+       if ((status == -EPERM) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
                status = nfs4_find_root_sec(server, fhandle, info);
        if (status == 0)
                status = nfs4_server_capabilities(server, fhandle);

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 685a8a7..75bcc3f 100644 (file)
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1004,6 +1004,7 @@ static int nfs_parse_security_flavors(char *value,
                return 0;
        }
 
+       mnt->flags |= NFS_MOUNT_SECFLAVOUR;
        mnt->auth_flavor_len = 1;
        return 1;
 }