knfsd: fix callback rpc cred

It doesn't make sense to make the callback with credentials that the
client made the setclientid with.  Instead the spec requires that the
callback occur with the credentials the client authenticated *to*.
It probably doesn't matter what we use for auth_unix, and some more
infrastructure will be needed for auth_gss, so let's just remove the
cred lookup for now.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Acked-by:  Neil Brown <neilb@suse.de>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index c17a5202ee3f3c6e9a6ecef4597509febcab97f9..c1cb7e009c1ef54fc3391b933564f872f769c2b7 100644 (file)
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -344,28 +344,6 @@ static struct rpc_version *        nfs_cb_version[] = {
        &nfs_cb_version4,
 };
 
-/*
- * Use the SETCLIENTID credential
- */
-static struct rpc_cred *
-nfsd4_lookupcred(struct nfs4_client *clp, int taskflags)
-{
-        struct auth_cred acred;
-       struct rpc_clnt *clnt = clp->cl_callback.cb_client;
-       struct rpc_cred *ret;
-
-        get_group_info(clp->cl_cred.cr_group_info);
-        acred.uid = clp->cl_cred.cr_uid;
-        acred.gid = clp->cl_cred.cr_gid;
-        acred.group_info = clp->cl_cred.cr_group_info;
-
-        dprintk("NFSD:     looking up %s cred\n",
-                clnt->cl_auth->au_ops->au_name);
-        ret = rpcauth_lookup_credcache(clnt->cl_auth, &acred, taskflags);
-        put_group_info(clp->cl_cred.cr_group_info);
-        return ret;
-}
-
 /* Reference counting, callback cleanup, etc., all look racy as heck.
  * And why is cb_set an atomic? */
 
@@ -379,18 +357,13 @@ static int do_probe_callback(void *data)
        };
        int status;
 
-       msg.rpc_cred = nfsd4_lookupcred(clp, 0);
-       if (IS_ERR(msg.rpc_cred))
-               goto out;
        status = rpc_call_sync(cb->cb_client, &msg, RPC_TASK_SOFT);
-       put_rpccred(msg.rpc_cred);
 
        if (status) {
                rpc_shutdown_client(cb->cb_client);
                cb->cb_client = NULL;
        } else
                atomic_set(&cb->cb_set, 1);
-out:
        put_nfs4_client(clp);
        return 0;
 }
@@ -488,10 +461,6 @@ nfsd4_cb_recall(struct nfs4_delegation *dp)
        if ((!atomic_read(&clp->cl_callback.cb_set)) || !clnt)
                return;
 
-       msg.rpc_cred = nfsd4_lookupcred(clp, 0);
-       if (IS_ERR(msg.rpc_cred))
-               goto out;
-
        cbr->cbr_trunc = 0; /* XXX need to implement truncate optimization */
        cbr->cbr_dp = dp;
 
@@ -512,8 +481,6 @@ nfsd4_cb_recall(struct nfs4_delegation *dp)
                status = rpc_call_sync(clnt, &msg, RPC_TASK_SOFT);
        }
 out_put_cred:
-       put_rpccred(msg.rpc_cred);
-out:
        if (status == -EIO)
                atomic_set(&clp->cl_callback.cb_set, 0);
        /* Success or failure, now we're either waiting for lease expiration