From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753514AbcIBLJ5 (ORCPT ); Fri, 2 Sep 2016 07:09:57 -0400 Received: from p3plsmtps2ded04.prod.phx3.secureserver.net ([208.109.80.198]:53508 "EHLO p3plsmtps2ded04.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752858AbcIBLJ4 (ORCPT ); Fri, 2 Sep 2016 07:09:56 -0400 x-originating-ip: 72.167.245.219 From: kys@exchange.microsoft.com To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, devel@linuxdriverproject.org, olaf@aepfle.de, apw@canonical.com, vkuznets@redhat.com, jasowang@redhat.com, leann.ogasawara@canonical.com, alexng@microsoft.com Cc: Alex Ng , "K. Y. Srinivasan" Subject: [PATCH 7/7] Drivers: hv: utils: Check VSS daemon is listening before a hot backup Date: Fri, 2 Sep 2016 05:58:25 -0700 Message-Id: <1472821105-7150-7-git-send-email-kys@exchange.microsoft.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1472821105-7150-1-git-send-email-kys@exchange.microsoft.com> References: <1472821013-7106-1-git-send-email-kys@exchange.microsoft.com> <1472821105-7150-1-git-send-email-kys@exchange.microsoft.com> Reply-To: kys@microsoft.com X-CMAE-Envelope: MS4wfGK8zhsVVYb1TxsPR0Eq2hQPvrwv0golr0ucLdj8ExHUX1ggk5WImBgxGjD5nlFRjVeFAlwQRhhKvssIorHuiSlc+yJJhhZcj5Be4gGyKanriWHEUsBb gXPTANquKhUPWCSyS+lCTvCYdfKOPV1MnvuHNEtgWcKdA6kUEODlR7/uQ18gA2bQD2/wPcTX2iJUtZK888xpr5rJc//s9lRnuoBwWEdsZ8q9vf9Hdosen9R7 ovO9gcr/8EycaN5hm3sl16vrmgdqFrA7c7/YI5mO4fdEC2bReUZD1t1tLXrO/q0gi2meJj5QIH29smT4zTpb8jHcrPARpgQPdiEpPMLyIAiZPWpawL/DT8pP OdW0ptuuPosgaX+WWSvEy01D1Bd0fJrxdX59idz96JvacsLyCOKcLT8PRNahVlXgQuO45Wgnyw85h7CxVbe+g8165v8Jf2fzFzxtLfHT9pJyXL120QdNxkOx +CZpogy81gu6QDUbMFP5nZCtexuf/QCNwOMGcAF+oyY1QHc5NX+YU60MWW/r31i9yqidRcUk0PybT0NY Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Alex Ng Hyper-V host will send a VSS_OP_HOT_BACKUP request to check if guest is ready for a live backup/snapshot. The driver should respond to the check only if the daemon is running and listening to requests. This allows the host to fallback to standard snapshots in case the VSS daemon is not running. Signed-off-by: Alex Ng Signed-off-by: K. Y. Srinivasan --- drivers/hv/hv_snapshot.c | 9 ++++++--- tools/hv/hv_vss_daemon.c | 3 +++ 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c index c4013c8..a670713 100644 --- a/drivers/hv/hv_snapshot.c +++ b/drivers/hv/hv_snapshot.c @@ -142,6 +142,11 @@ static int vss_on_msg(void *msg, int len) return vss_handle_handshake(vss_msg); } else if (vss_transaction.state == HVUTIL_USERSPACE_REQ) { vss_transaction.state = HVUTIL_USERSPACE_RECV; + + if (vss_msg->vss_hdr.operation == VSS_OP_HOT_BACKUP) + vss_transaction.msg->vss_cf.flags = + VSS_HBU_NO_AUTO_RECOVERY; + if (cancel_delayed_work_sync(&vss_timeout_work)) { vss_respond_to_host(vss_msg->error); /* Transaction is finished, reset the state. */ @@ -202,6 +207,7 @@ static void vss_handle_request(struct work_struct *dummy) */ case VSS_OP_THAW: case VSS_OP_FREEZE: + case VSS_OP_HOT_BACKUP: if (vss_transaction.state < HVUTIL_READY) { /* Userspace is not registered yet */ vss_respond_to_host(HV_E_FAIL); @@ -210,9 +216,6 @@ static void vss_handle_request(struct work_struct *dummy) vss_transaction.state = HVUTIL_HOSTMSG_RECEIVED; vss_send_op(); return; - case VSS_OP_HOT_BACKUP: - vss_transaction.msg->vss_cf.flags = VSS_HBU_NO_AUTO_RECOVERY; - break; case VSS_OP_GET_DM_INFO: vss_transaction.msg->dm_info.flags = 0; break; diff --git a/tools/hv/hv_vss_daemon.c b/tools/hv/hv_vss_daemon.c index 5d51d6f..e082980 100644 --- a/tools/hv/hv_vss_daemon.c +++ b/tools/hv/hv_vss_daemon.c @@ -250,6 +250,9 @@ int main(int argc, char *argv[]) syslog(LOG_ERR, "/etc/fstab and /proc/mounts"); } break; + case VSS_OP_HOT_BACKUP: + syslog(LOG_INFO, "VSS: op=CHECK HOT BACKUP\n"); + break; default: syslog(LOG_ERR, "Illegal op:%d\n", op); } -- 1.7.4.1