+int vsock_bind_dgram_generic(struct vsock_sock *vsk, struct sockaddr_vm *addr)
+{
+ static u32 port = LAST_RESERVED_PORT + 1;
+ struct sockaddr_vm new_addr;
+
+ vsock_addr_init(&new_addr, addr->svm_cid, addr->svm_port);
+
+ if (addr->svm_port == VMADDR_PORT_ANY) {
+ bool found = false;
+ unsigned int i;
+
+ for (i = 0; i < MAX_PORT_RETRIES; i++) {
+ if (port <= LAST_RESERVED_PORT)
+ port = LAST_RESERVED_PORT + 1;
+
+ new_addr.svm_port = port++;
+
+ if (!__vsock_find_unbound_socket(&new_addr)) {
+ found = true;
+ break;
+ }
+ }
+
+ if (!found)
+ return -EADDRNOTAVAIL;
+ } else {
+ /* If port is in reserved range, ensure caller
+ * has necessary privileges.
+ */
+ if (addr->svm_port <= LAST_RESERVED_PORT &&
+ !capable(CAP_NET_BIND_SERVICE)) {
+ return -EACCES;
+ }
+
+ if (__vsock_find_unbound_socket(&new_addr))
+ return -EADDRINUSE;
+ }
+
+ vsock_addr_init(&vsk->local_addr, new_addr.svm_cid, new_addr.svm_port);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(vsock_bind_dgram_generic);
+