From patchwork Mon Aug 30 16:32:32 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 63083 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 91795B6F0D for ; Tue, 31 Aug 2010 02:50:34 +1000 (EST) Received: from localhost ([127.0.0.1]:46661 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Oq7Yi-0007aP-Rj for incoming@patchwork.ozlabs.org; Mon, 30 Aug 2010 12:50:12 -0400 Received: from [140.186.70.92] (port=42352 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Oq7Je-0001qP-Sq for qemu-devel@nongnu.org; Mon, 30 Aug 2010 12:34:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1Oq7Hf-00055S-8E for qemu-devel@nongnu.org; Mon, 30 Aug 2010 12:32:36 -0400 Received: from mx1.redhat.com ([209.132.183.28]:65416) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1Oq7Hf-00055I-1W for qemu-devel@nongnu.org; Mon, 30 Aug 2010 12:32:35 -0400 Received: from int-mx08.intmail.prod.int.phx2.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o7UGWXIm005762 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 30 Aug 2010 12:32:33 -0400 Received: from dhcp-5-188.str.redhat.com (dhcp-5-175.str.redhat.com [10.32.5.175]) by int-mx08.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o7UGWKtj029322; Mon, 30 Aug 2010 12:32:32 -0400 From: Kevin Wolf To: anthony@codemonkey.ws Date: Mon, 30 Aug 2010 18:32:32 +0200 Message-Id: <1283185953-30639-10-git-send-email-kwolf@redhat.com> In-Reply-To: <1283185953-30639-1-git-send-email-kwolf@redhat.com> References: <1283185953-30639-1-git-send-email-kwolf@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.21 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [Qemu-devel] [PATCH 09/10] monitor: make 'info snapshots' show only fully available snapshots X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Miguel Di Ciurcio Filho The output generated by 'info snapshots' shows only snapshots that exist on the block device that saves the VM state. This output can cause an user to erroneously try to load an snapshot that is not available on all block devices. $ qemu-img snapshot -l xxtest.qcow2 Snapshot list: ID TAG VM SIZE DATE VM CLOCK 1 1.5M 2010-07-26 16:51:52 00:00:08.599 2 1.5M 2010-07-26 16:51:53 00:00:09.719 3 1.5M 2010-07-26 17:26:49 00:00:13.245 4 1.5M 2010-07-26 19:01:00 00:00:46.763 $ qemu-img snapshot -l xxtest2.qcow2 Snapshot list: ID TAG VM SIZE DATE VM CLOCK 3 0 2010-07-26 17:26:49 00:00:13.245 4 0 2010-07-26 19:01:00 00:00:46.763 Current output: $ qemu -hda xxtest.qcow2 -hdb xxtest2.qcow2 -monitor stdio -vnc :0 QEMU 0.12.4 monitor - type 'help' for more information (qemu) info snapshots Snapshot devices: ide0-hd0 Snapshot list (from ide0-hd0): ID TAG VM SIZE DATE VM CLOCK 1 1.5M 2010-07-26 16:51:52 00:00:08.599 2 1.5M 2010-07-26 16:51:53 00:00:09.719 3 1.5M 2010-07-26 17:26:49 00:00:13.245 4 1.5M 2010-07-26 19:01:00 00:00:46.763 Snapshots 1 and 2 do not exist on xxtest2.qcow, but they are displayed anyway. This patch sumarizes the output to only show fully available snapshots. New output: (qemu) info snapshots ID TAG VM SIZE DATE VM CLOCK 3 1.5M 2010-07-26 17:26:49 00:00:13.245 4 1.5M 2010-07-26 19:01:00 00:00:46.763 Signed-off-by: Miguel Di Ciurcio Filho Signed-off-by: Kevin Wolf --- savevm.c | 59 +++++++++++++++++++++++++++++++++++++++++++---------------- 1 files changed, 43 insertions(+), 16 deletions(-) diff --git a/savevm.c b/savevm.c index 99e4949..d286592 100644 --- a/savevm.c +++ b/savevm.c @@ -2039,8 +2039,10 @@ void do_delvm(Monitor *mon, const QDict *qdict) void do_info_snapshots(Monitor *mon) { BlockDriverState *bs, *bs1; - QEMUSnapshotInfo *sn_tab, *sn; - int nb_sns, i; + QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s; + int nb_sns, i, ret, available; + int total; + int *available_snapshots; char buf[256]; bs = bdrv_snapshots(); @@ -2048,27 +2050,52 @@ void do_info_snapshots(Monitor *mon) monitor_printf(mon, "No available block device supports snapshots\n"); return; } - monitor_printf(mon, "Snapshot devices:"); - bs1 = NULL; - while ((bs1 = bdrv_next(bs1))) { - if (bdrv_can_snapshot(bs1)) { - if (bs == bs1) - monitor_printf(mon, " %s", bdrv_get_device_name(bs1)); - } - } - monitor_printf(mon, "\n"); nb_sns = bdrv_snapshot_list(bs, &sn_tab); if (nb_sns < 0) { monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns); return; } - monitor_printf(mon, "Snapshot list (from %s):\n", - bdrv_get_device_name(bs)); - monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); - for(i = 0; i < nb_sns; i++) { + + if (nb_sns == 0) { + monitor_printf(mon, "There is no snapshot available.\n"); + return; + } + + available_snapshots = qemu_mallocz(sizeof(int) * nb_sns); + total = 0; + for (i = 0; i < nb_sns; i++) { sn = &sn_tab[i]; - monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); + available = 1; + bs1 = NULL; + + while ((bs1 = bdrv_next(bs1))) { + if (bdrv_can_snapshot(bs1) && bs1 != bs) { + ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str); + if (ret < 0) { + available = 0; + break; + } + } + } + + if (available) { + available_snapshots[total] = i; + total++; + } } + + if (total > 0) { + monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL)); + for (i = 0; i < total; i++) { + sn = &sn_tab[available_snapshots[i]]; + monitor_printf(mon, "%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn)); + } + } else { + monitor_printf(mon, "There is no suitable snapshot available\n"); + } + qemu_free(sn_tab); + qemu_free(available_snapshots); + }