From nobody Mon Sep 15 19:52:08 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=ispras.ru ARC-Seal: i=1; a=rsa-sha256; t=1601745322; cv=none; d=zohomail.com; s=zohoarc; b=Nq/WcJ9KGo0Ode2B+mPj8c4kj+VTLEcu7ZPxU5Lf+qtzK/oKTkX0tPnVmNuB41JHGiHuS58OdnBDkatkzxnSfKohP/QAFrx1FkAfOgu6TOFbJRummZIVSzJ/3g3V7Q5xrpseIx5GluUlk2KkJECUU6LLoKb7tZOQ/bc/ZsA2tZE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1601745322; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=AMZuxPcwrezh21NWGzspNcB+RZpsb08kki7hQFR1yCw=; b=lEcPmADgWukknHVQLmPes/IBNZvbNZLA+xN7TjSCb4Jtabl6LO2h/vG2OyTuzPo8t28lluLiSYZ2RADZmw/c42eLscFtBt7iPhyOHR+eMk22s5H4I5c4iIv/IJKhMYfgZeWLb/d9wqUMpNRG1v2ZNre3LUo4SyR6hO96qa3oPpg= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1601745322722592.1408256370427; Sat, 3 Oct 2020 10:15:22 -0700 (PDT) Received: from localhost ([::1]:47488 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kOl7x-0003di-73 for importer@patchew.org; Sat, 03 Oct 2020 13:15:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:43100) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kOl5o-00029D-7k for qemu-devel@nongnu.org; Sat, 03 Oct 2020 13:13:08 -0400 Received: from mail.ispras.ru ([83.149.199.84]:35970) by eggs.gnu.org with esmtps (TLS1.2:DHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kOl5m-0008Ee-2W for qemu-devel@nongnu.org; Sat, 03 Oct 2020 13:13:07 -0400 Received: from [127.0.1.1] (unknown [62.118.151.149]) by mail.ispras.ru (Postfix) with ESMTPSA id 008B740A1DB0; Sat, 3 Oct 2020 17:13:03 +0000 (UTC) Subject: [PATCH v7 03/14] qcow2: introduce icount field for snapshots From: Pavel Dovgalyuk To: qemu-devel@nongnu.org Date: Sat, 03 Oct 2020 20:13:02 +0300 Message-ID: <160174518284.12451.2301137308458777398.stgit@pasha-ThinkPad-X280> In-Reply-To: <160174516520.12451.10785284392438702137.stgit@pasha-ThinkPad-X280> References: <160174516520.12451.10785284392438702137.stgit@pasha-ThinkPad-X280> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=83.149.199.84; envelope-from=pavel.dovgalyuk@ispras.ru; helo=mail.ispras.ru X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/03 13:12:47 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kwolf@redhat.com, wrampazz@redhat.com, pavel.dovgalyuk@ispras.ru, ehabkost@redhat.com, alex.bennee@linaro.org, mtosatti@redhat.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, crosa@redhat.com, pbonzini@redhat.com, philmd@redhat.com, zhiwei_liu@c-sky.com, rth@twiddle.net Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" This patch introduces the icount field for saving within the snapshot. It is required for navigation between the snapshots in record/replay mode. Signed-off-by: Pavel Dovgalyuk Acked-by: Kevin Wolf -- v7 changes: - also fix the test which checks qcow2 snapshot extra data --- block/qcow2-snapshot.c | 7 ++++++ block/qcow2.h | 3 +++ docs/interop/qcow2.txt | 5 ++++ tests/qemu-iotests/261 | 15 ++++++++----- tests/qemu-iotests/261.out | 51 +++++++++++++++++++++++++++++-----------= ---- 5 files changed, 58 insertions(+), 23 deletions(-) diff --git a/block/qcow2-snapshot.c b/block/qcow2-snapshot.c index 9b68690f56..d68b25e0c5 100644 --- a/block/qcow2-snapshot.c +++ b/block/qcow2-snapshot.c @@ -164,6 +164,12 @@ static int qcow2_do_read_snapshots(BlockDriverState *b= s, bool repair, sn->disk_size =3D bs->total_sectors * BDRV_SECTOR_SIZE; } =20 + if (sn->extra_data_size >=3D endof(QCowSnapshotExtraData, icount))= { + sn->icount =3D be64_to_cpu(extra.icount); + } else { + sn->icount =3D -1ULL; + } + if (sn->extra_data_size > sizeof(extra)) { uint64_t extra_data_end; size_t unknown_extra_data_size; @@ -333,6 +339,7 @@ int qcow2_write_snapshots(BlockDriverState *bs) memset(&extra, 0, sizeof(extra)); extra.vm_state_size_large =3D cpu_to_be64(sn->vm_state_size); extra.disk_size =3D cpu_to_be64(sn->disk_size); + extra.icount =3D cpu_to_be64(sn->icount); =20 id_str_size =3D strlen(sn->id_str); name_size =3D strlen(sn->name); diff --git a/block/qcow2.h b/block/qcow2.h index b71e444fca..125ea9679b 100644 --- a/block/qcow2.h +++ b/block/qcow2.h @@ -206,6 +206,7 @@ typedef struct QEMU_PACKED QCowSnapshotHeader { typedef struct QEMU_PACKED QCowSnapshotExtraData { uint64_t vm_state_size_large; uint64_t disk_size; + uint64_t icount; } QCowSnapshotExtraData; =20 =20 @@ -219,6 +220,8 @@ typedef struct QCowSnapshot { uint32_t date_sec; uint32_t date_nsec; uint64_t vm_clock_nsec; + /* icount value for the moment when snapshot was taken */ + uint64_t icount; /* Size of all extra data, including QCowSnapshotExtraData if availabl= e */ uint32_t extra_data_size; /* Data beyond QCowSnapshotExtraData, if any */ diff --git a/docs/interop/qcow2.txt b/docs/interop/qcow2.txt index 7da0d81df8..0463f761ef 100644 --- a/docs/interop/qcow2.txt +++ b/docs/interop/qcow2.txt @@ -707,6 +707,11 @@ Snapshot table entry: =20 Byte 48 - 55: Virtual disk size of the snapshot in b= ytes =20 + Byte 56 - 63: icount value which corresponds to + the record/replay instruction count + when the snapshot was taken. Set to -1 + if icount was disabled + Version 3 images must include extra data at least up to byte 55. =20 diff --git a/tests/qemu-iotests/261 b/tests/qemu-iotests/261 index ddcb04f285..848ffa760d 100755 --- a/tests/qemu-iotests/261 +++ b/tests/qemu-iotests/261 @@ -91,7 +91,10 @@ print_snapshot_table() if [ $extra_len -ge 16 ]; then echo " Disk size: $(peek_file_be "$1" $((extra_ofs + 8)) 8)" fi - if [ $extra_len -gt 16 ]; then + if [ $extra_len -ge 24 ]; then + echo " Icount: $(peek_file_be "$1" $((extra_ofs + 16)) 8)" + fi + if [ $extra_len -gt 24 ]; then echo ' Unknown extra data:' \ "$(peek_file_raw "$1" $((extra_ofs + 16)) $((extra_len - 1= 6)) \ | tr -d '\0')" @@ -198,12 +201,12 @@ truncate -s 0 "$TEST_DIR/sn0-extra" truncate -s $(($(snapshot_table_entry_size "$TEST_DIR/sn0-pre") - 40)) \ "$TEST_DIR/sn0-post" =20 -# Set sn1's extra data size to 42 -poke_file "$TEST_DIR/sn1-pre" 36 '\x00\x00\x00\x2a' -truncate -s 42 "$TEST_DIR/sn1-extra" -poke_file "$TEST_DIR/sn1-extra" 16 'very important data' +# Set sn1's extra data size to 50 +poke_file "$TEST_DIR/sn1-pre" 36 '\x00\x00\x00\x32' +truncate -s 50 "$TEST_DIR/sn1-extra" +poke_file "$TEST_DIR/sn1-extra" 24 'very important data' # Grow sn1-post to pad -truncate -s $(($(snapshot_table_entry_size "$TEST_DIR/sn1-pre") - 82)) \ +truncate -s $(($(snapshot_table_entry_size "$TEST_DIR/sn1-pre") - 90)) \ "$TEST_DIR/sn1-post" =20 # Set sn2's extra data size to 8 diff --git a/tests/qemu-iotests/261.out b/tests/qemu-iotests/261.out index 2600354566..612433ae40 100644 --- a/tests/qemu-iotests/261.out +++ b/tests/qemu-iotests/261.out @@ -12,9 +12,10 @@ Snapshots in TEST_DIR/t.IMGFMT.v2.orig: [1] ID: 2 Name: sn1 - Extra data size: 42 + Extra data size: 50 VM state size: 0 Disk size: 67108864 + Icount: 0 Unknown extra data: very important data [2] ID: 3 @@ -29,22 +30,25 @@ Snapshots in TEST_DIR/t.IMGFMT.v3.orig: [0] ID: 1 Name: sn0 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 [1] ID: 2 Name: sn1 - Extra data size: 42 + Extra data size: 50 VM state size: 0 Disk size: 67108864 + Icount: 0 Unknown extra data: very important data [2] ID: 3 Name: sn2 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 =20 =3D=3D=3D Repair botched v3 =3D=3D=3D =20 @@ -61,22 +65,25 @@ Snapshots in TEST_DIR/t.IMGFMT: [0] ID: 1 Name: sn0 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 [1] ID: 2 Name: sn1 - Extra data size: 42 + Extra data size: 50 VM state size: 0 Disk size: 67108864 + Icount: 0 Unknown extra data: very important data [2] ID: 3 Name: sn2 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 =20 =3D=3D=3D Add new snapshot =3D=3D=3D =20 @@ -85,28 +92,32 @@ Snapshots in TEST_DIR/t.IMGFMT: [0] ID: 1 Name: sn0 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 [1] ID: 2 Name: sn1 - Extra data size: 42 + Extra data size: 50 VM state size: 0 Disk size: 67108864 + Icount: 0 Unknown extra data: very important data [2] ID: 3 Name: sn2 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 [3] ID: 4 Name: sn3 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 0 =20 =3D=3D=3D Remove different snapshots =3D=3D=3D =20 @@ -116,16 +127,18 @@ Snapshots in TEST_DIR/t.IMGFMT: [0] ID: 2 Name: sn1 - Extra data size: 42 + Extra data size: 50 VM state size: 0 Disk size: 67108864 + Icount: 0 Unknown extra data: very important data [1] ID: 3 Name: sn2 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 =20 --- sn1 --- No errors were found on the image. @@ -133,15 +146,17 @@ Snapshots in TEST_DIR/t.IMGFMT: [0] ID: 1 Name: sn0 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 [1] ID: 3 Name: sn2 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 =20 --- sn2 --- No errors were found on the image. @@ -149,15 +164,17 @@ Snapshots in TEST_DIR/t.IMGFMT: [0] ID: 1 Name: sn0 - Extra data size: 16 + Extra data size: 24 VM state size: 0 Disk size: 67108864 + Icount: 18446744073709551615 [1] ID: 2 Name: sn1 - Extra data size: 42 + Extra data size: 50 VM state size: 0 Disk size: 67108864 + Icount: 0 Unknown extra data: very important data =20 =3D=3D=3D Reject too much unknown extra data =3D=3D=3D