SUNRPC: Add an rpc_credop callback for binding a credential to an rpc_task

We need the ability to treat 'generic' creds specially, since they want to
bind instances of the auth cred instead of binding themselves.

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

1 files changed, 15 insertions, 0 deletions

diff --git a/net/sunrpc/auth_generic.c b/net/sunrpc/auth_generic.c
index 6f129b1b20a0..6a3f77c9e4d3 100644
--- a/net/sunrpc/auth_generic.c
+++ b/net/sunrpc/auth_generic.c
@@ -35,6 +35,20 @@ struct rpc_cred *rpc_lookup_cred(void)
 }
 EXPORT_SYMBOL_GPL(rpc_lookup_cred);
 
+static void
+generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred)
+{
+        struct rpc_auth *auth = task->tk_client->cl_auth;
+        struct auth_cred *acred = &container_of(cred, struct generic_cred, gc_base)->acred;
+        struct rpc_cred *ret;
+
+        ret = auth->au_ops->lookup_cred(auth, acred, 0);
+        if (!IS_ERR(ret))
+                task->tk_msg.rpc_cred = ret;
+        else
+                task->tk_status = PTR_ERR(ret);
+}
+
 /*
  * Lookup generic creds for current process
  */
@@ -138,5 +152,6 @@ static struct rpc_auth generic_auth = {
 static const struct rpc_credops generic_credops = {
         .cr_name = "Generic cred",
         .crdestroy = generic_destroy_cred,
+        .crbind = generic_bind_cred,
         .crmatch = generic_match,
 };