SUNRPC: Fix a lock recursion in the auth_gss downcall

 When we look up a new cred in the auth_gss downcall so that we can stuff
 the credcache, we do not want that lookup to queue up an upcall in order
 to initialise it. To do an upcall here not only redundant, but since we
 are already holding the inode->i_mutex, it will trigger a lock recursion.

 This patch allows rpcauth cache searches to indicate that they can cope
 with uninitialised credentials.

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

1 files changed, 3 insertions, 3 deletions

diff --git a/net/sunrpc/auth_unix.c b/net/sunrpc/auth_unix.c
index 1b3ed4fd1987..df14b6bfbf10 100644
--- a/net/sunrpc/auth_unix.c
+++ b/net/sunrpc/auth_unix.c
@@ -75,7 +75,7 @@ unx_create_cred(struct rpc_auth *auth, struct auth_cred *acred, int flags)
 
         atomic_set(&cred->uc_count, 1);
         cred->uc_flags = RPCAUTH_CRED_UPTODATE;
-        if (flags & RPC_TASK_ROOTCREDS) {
+        if (flags & RPCAUTH_LOOKUP_ROOTCREDS) {
                 cred->uc_uid = 0;
                 cred->uc_gid = 0;
                 cred->uc_gids[0] = NOGROUP;
@@ -108,12 +108,12 @@ unx_destroy_cred(struct rpc_cred *cred)
  * request root creds (e.g. for NFS swapping).
  */
 static int
-unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int taskflags)
+unx_match(struct auth_cred *acred, struct rpc_cred *rcred, int flags)
 {
         struct unx_cred *cred = (struct unx_cred *) rcred;
         int             i;
 
-        if (!(taskflags & RPC_TASK_ROOTCREDS)) {
+        if (!(flags & RPCAUTH_LOOKUP_ROOTCREDS)) {
                 int groups;
 
                 if (cred->uc_uid != acred->uid