fabrics: Filter discovery ctrls out during application context check

We also need to filter out the well known discovery controllers when
using the execution context filtering. Obviously, we can't use the
subsystem name, thus match on the host and target address instead.

Signed-off-by: Daniel Wagner <[email protected]>

Author: dwsuse

src/nvme/fabrics.c

@@ -860,15 +860,33 @@ int nvmf_add_ctrl(nvme_host_t h, nvme_ctrl_t c,
 	}
 
 	root_app = nvme_root_get_application(h->r);
-	app = nvme_subsystem_get_application(s);
 	if (root_app) {
+		app = nvme_subsystem_get_application(s);
+		if (!app && nvme_ctrl_is_discovery_ctrl(c)) {
+			nvme_subsystem_t s;
+			nvme_ctrl_t fc;
+
+			nvme_for_each_subsystem(h, s) {
+				fc = __nvme_lookup_ctrl(s, nvme_ctrl_get_transport(c),
+							nvme_ctrl_get_traddr(c),
+							nvme_ctrl_get_host_traddr(c),
+							nvme_ctrl_get_host_iface(c),
+							nvme_ctrl_get_trsvcid(c),
+							NULL);
+
+				if (fc) {
+					app = nvme_subsystem_get_application(s);
+					break;
+				}
+			}
+		}
 		/*
 		 * configuration is managed by an application,
 		 * refuse to act on subsystems which either have
 		 * no application set or which habe a different
 		 * application string.
 		 */
-		if (!app || strcmp(app, root_app)) {
+		if (app && strcmp(app, root_app)) {
 			nvme_msg(h->r, LOG_INFO, "skip %s, not managed by %s\n",
 				 nvme_subsystem_get_nqn(s), root_app);
 			errno = ENVME_CONNECT_IGNORED;