From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by passt.top (Postfix, from userid 1000) id D88A75A0641; Fri, 31 Jan 2025 20:39:53 +0100 (CET) From: Stefano Brivio To: passt-dev@passt.top Subject: [PATCH v3 17/20] vhost_user: Make source quit after reporting migration state Date: Fri, 31 Jan 2025 20:39:50 +0100 Message-ID: <20250131193953.3034031-18-sbrivio@redhat.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250131193953.3034031-1-sbrivio@redhat.com> References: <20250131193953.3034031-1-sbrivio@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID-Hash: JXCVMINEIYYRCPTKUSGQK2SRC4JMI3FP X-Message-ID-Hash: JXCVMINEIYYRCPTKUSGQK2SRC4JMI3FP X-MailFrom: sbrivio@passt.top X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header CC: Laurent Vivier , David Gibson X-Mailman-Version: 3.3.8 Precedence: list List-Id: Development discussion and patches for passt Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On migration, the source process asks passt-helper to set TCP sockets in repair mode, dumps the information we need to migrate connections, and closes them. At this point, we can't pass them back to passt-helper using SCM_RIGHTS, because they are closed, from that perspective, and sendmsg() will give us EBADF. But if we don't clear repair mode, the port they are bound to will not be available for binding in the target. Terminate once we're done with the migration and we reported the state. This is equivalent to clearing repair mode on the sockets we just closed. Signed-off-by: Stefano Brivio --- vhost_user.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/vhost_user.c b/vhost_user.c index 1092387..19ede8a 100644 --- a/vhost_user.c +++ b/vhost_user.c @@ -997,6 +997,8 @@ static bool vu_send_rarp_exec(struct vu_dev *vdev, return false; } +static bool quit_on_device_state = false; + /** * vu_set_device_state_fd_exec() - Set the device state migration channel * @vdev: vhost-user device @@ -1024,6 +1026,9 @@ static bool vu_set_device_state_fd_exec(struct vu_dev *vdev, migrate_request(vdev->context, msg->fds[0], direction == VHOST_USER_TRANSFER_STATE_DIRECTION_LOAD); + if (direction == VHOST_USER_TRANSFER_STATE_DIRECTION_SAVE) + quit_on_device_state = true; + /* We don't provide a new fd for the data transfer */ vmsg_set_reply_u64(msg, VHOST_USER_VRING_NOFD_MASK); @@ -1201,4 +1206,10 @@ void vu_control_handler(struct vu_dev *vdev, int fd, uint32_t events) if (reply_requested) vu_send_reply(fd, &msg); + + if (quit_on_device_state && + msg.hdr.request == VHOST_USER_CHECK_DEVICE_STATE) { + info("Migration complete, exiting"); + exit(EXIT_SUCCESS); + } } -- 2.43.0