msg/async: bug fix 23600. After listen_socket was closed, it entered …

…the start() process magically. so I think we should make '_fd = -1' when listen_socket was closed. And in the start process, determine the value of listen_socket, if it equal to -1, return the process

Fixes: https://tracker.ceph.com/issues/23600

Signed-off-by: shangfufei <shangfufei@inspur.com>

src/msg/async/AsyncMessenger.cc

@@ -153,6 +153,10 @@ void Processor::start()
 
   // start thread
   if (listen_socket) {
+    if (listen_socket.fd() == -1) {
+      ldout(msgr->cct, 1) << __func__ << " Erro: processor restart after listen_socket.fd closed. " << this << dendl;
+      return;
+    }
     worker->center.submit_to(worker->center.get_id(), [this]() {
       worker->center.create_file_event(listen_socket.fd(), EVENT_READABLE, listen_handler); }, false);
   }

src/msg/async/PosixStack.cc

@@ -173,6 +173,7 @@ class PosixServerSocketImpl : public ServerSocketImpl {
   int accept(ConnectedSocket *sock, const SocketOptions &opts, entity_addr_t *out, Worker *w) override;
   void abort_accept() override {
     ::close(_fd);
+    _fd = -1;
   }
   int fd() const override {
     return _fd;