handle map fd not found

Signed-off-by: Ric Li <[email protected]>
OpenVisualCloud · Nov 3, 2023 · 9bace79 · 9bace79
1 parent 27dd729
commit 9bace79
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/tools/ebpf/et.c b/tools/ebpf/et.c
@@ -169,7 +169,7 @@ static int et_xdp_loop(struct et_ctx* ctx) {
       continue;
     }
     char ifname[IFNAMSIZ];
-    int map_fd;
+    int map_fd = -1;
     recv(conn, ifname, sizeof(ifname), 0);
     printf("request xsk_map_fd for ifname %s\n", ifname);
     int ifindex = if_nametoindex(ifname);
@@ -179,6 +179,10 @@ static int et_xdp_loop(struct et_ctx* ctx) {
         break;
       }
     }
+    if (map_fd < 0) {
+      printf("xsk_map_fd not found for %s\n", ifname);
+      goto cleanup;
+    }
     send_fd(conn, map_fd);
     close(conn);
     printf("map_fd %d sent, close conn\n", map_fd);