RPCSEC_GSS: Clean up upcall message allocation

Optimise away gss_encode_msg: we don't need to look up the pipe
version a second time.

Save the gss target name in struct gss_auth. It is a property of the
auth cache itself, and doesn't really belong in the rpc_client.

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

1 files changed, 19 insertions, 18 deletions

diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index fc2f78d6a9b4..b62812a224a8 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -84,6 +84,7 @@ struct gss_auth {
          * backwards-compatibility with older gssd's.
          */
         struct rpc_pipe *pipe[2];
+        const char *target_name;
 };
 
 /* pipe_version >= 0 if and only if someone has a pipe open. */
@@ -406,8 +407,8 @@ static void gss_encode_v0_msg(struct gss_upcall_msg *gss_msg)
 }
 
 static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg,
-                                struct rpc_clnt *clnt,
-                                const char *service_name)
+                                const char *service_name,
+                                const char *target_name)
 {
         struct gss_api_mech *mech = gss_msg->auth->mech;
         char *p = gss_msg->databuf;
@@ -417,8 +418,8 @@ static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg,
                                    mech->gm_name,
                                    from_kuid(&init_user_ns, gss_msg->uid));
         p += gss_msg->msg.len;
-        if (clnt->cl_principal) {
-                len = sprintf(p, "target=%s ", clnt->cl_principal);
+        if (target_name) {
+                len = sprintf(p, "target=%s ", target_name);
                 p += len;
                 gss_msg->msg.len += len;
         }
@@ -439,19 +440,6 @@ static void gss_encode_v1_msg(struct gss_upcall_msg *gss_msg,
         BUG_ON(gss_msg->msg.len > UPCALL_BUF_LEN);
 }
 
-static void gss_encode_msg(struct gss_upcall_msg *gss_msg,
-                                struct rpc_clnt *clnt,
-                                const char *service_name)
-{
-        struct net *net = rpc_net_ns(clnt);
-        struct sunrpc_net *sn = net_generic(net, sunrpc_net_id);
-
-        if (sn->pipe_version == 0)
-                gss_encode_v0_msg(gss_msg);
-        else /* pipe_version == 1 */
-                gss_encode_v1_msg(gss_msg, clnt, service_name);
-}
-
 static struct gss_upcall_msg *
 gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt,
                 kuid_t uid, const char *service_name)
@@ -474,7 +462,12 @@ gss_alloc_msg(struct gss_auth *gss_auth, struct rpc_clnt *clnt,
         atomic_set(&gss_msg->count, 1);
         gss_msg->uid = uid;
         gss_msg->auth = gss_auth;
-        gss_encode_msg(gss_msg, clnt, service_name);
+        switch (vers) {
+        case 0:
+                gss_encode_v0_msg(gss_msg);
+        default:
+                gss_encode_v1_msg(gss_msg, service_name, gss_auth->target_name);
+        };
         return gss_msg;
 }
 
@@ -883,6 +876,12 @@ gss_create(struct rpc_clnt *clnt, rpc_authflavor_t flavor)
                 return ERR_PTR(err);
         if (!(gss_auth = kmalloc(sizeof(*gss_auth), GFP_KERNEL)))
                 goto out_dec;
+        gss_auth->target_name = NULL;
+        if (clnt->cl_principal) {
+                gss_auth->target_name = kstrdup(clnt->cl_principal, GFP_KERNEL);
+                if (gss_auth->target_name == NULL)
+                        goto err_free;
+        }
         gss_auth->client = clnt;
         err = -EINVAL;
         gss_auth->mech = gss_mech_get_by_pseudoflavor(flavor);
@@ -937,6 +936,7 @@ err_destroy_pipe_1:
 err_put_mech:
         gss_mech_put(gss_auth->mech);
 err_free:
+        kfree(gss_auth->target_name);
         kfree(gss_auth);
 out_dec:
         module_put(THIS_MODULE);
@@ -950,6 +950,7 @@ gss_free(struct gss_auth *gss_auth)
         rpc_destroy_pipe_data(gss_auth->pipe[0]);
         rpc_destroy_pipe_data(gss_auth->pipe[1]);
         gss_mech_put(gss_auth->mech);
+        kfree(gss_auth->target_name);
 
         kfree(gss_auth);
         module_put(THIS_MODULE);