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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; From: Vladimir Sementsov-Ogievskiy To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, armbru@redhat.com, eblake@redhat.com, crosa@redhat.com, ehabkost@redhat.com, berrange@redhat.com, pbonzini@redhat.com, vsementsov@virtuozzo.com, jsnow@redhat.com, mreitz@redhat.com, kwolf@redhat.com Subject: [PATCH v6 19/33] block/copy-before-write: initialize block-copy bitmap Date: Wed, 21 Jul 2021 13:05:41 +0300 Message-Id: <20210721100555.45594-20-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210721100555.45594-1-vsementsov@virtuozzo.com> References: <20210721100555.45594-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: HE1PR0701CA0068.eurprd07.prod.outlook.com (2603:10a6:3:64::12) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: c77f767e-8627-4092-e823-08d94c2f39dc X-MS-TrafficTypeDiagnostic: AM7PR08MB5494: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:194; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.8.132; envelope-from=vsementsov@virtuozzo.com; helo=EUR04-VI1-obe.outbound.protection.outlook.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @virtuozzo.com) X-ZM-MESSAGEID: 1626863867344100001 Content-Type: text/plain; charset="utf-8" We are going to publish copy-before-write filter to be used in separate of backup. Future step would support bitmap for the filter. But let's start from full set bitmap. We have to modify backup, as bitmap is first initialized by copy-before-write filter, and then backup modifies it. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Max Reitz --- block/backup.c | 16 +++++++--------- block/copy-before-write.c | 4 ++++ 2 files changed, 11 insertions(+), 9 deletions(-) diff --git a/block/backup.c b/block/backup.c index 4869f1e5da..687d2882bc 100644 --- a/block/backup.c +++ b/block/backup.c @@ -233,18 +233,16 @@ static void backup_init_bcs_bitmap(BackupBlockJob *jo= b) BdrvDirtyBitmap *bcs_bitmap =3D block_copy_dirty_bitmap(job->bcs); =20 if (job->sync_mode =3D=3D MIRROR_SYNC_MODE_BITMAP) { + bdrv_clear_dirty_bitmap(bcs_bitmap, NULL); ret =3D bdrv_dirty_bitmap_merge_internal(bcs_bitmap, job->sync_bit= map, NULL, true); assert(ret); - } else { - if (job->sync_mode =3D=3D MIRROR_SYNC_MODE_TOP) { - /* - * We can't hog the coroutine to initialize this thoroughly. - * Set a flag and resume work when we are able to yield safely. - */ - block_copy_set_skip_unallocated(job->bcs, true); - } - bdrv_set_dirty_bitmap(bcs_bitmap, 0, job->len); + } else if (job->sync_mode =3D=3D MIRROR_SYNC_MODE_TOP) { + /* + * We can't hog the coroutine to initialize this thoroughly. + * Set a flag and resume work when we are able to yield safely. + */ + block_copy_set_skip_unallocated(job->bcs, true); } =20 estimate =3D bdrv_get_dirty_count(bcs_bitmap); diff --git a/block/copy-before-write.c b/block/copy-before-write.c index 1cefcade78..2efe098aae 100644 --- a/block/copy-before-write.c +++ b/block/copy-before-write.c @@ -147,6 +147,7 @@ static void cbw_child_perm(BlockDriverState *bs, BdrvCh= ild *c, static int cbw_init(BlockDriverState *bs, QDict *options, Error **errp) { BDRVCopyBeforeWriteState *s =3D bs->opaque; + BdrvDirtyBitmap *copy_bitmap; =20 bs->file =3D bdrv_open_child(NULL, options, "file", bs, &child_of_bds, BDRV_CHILD_FILTERED | BDRV_CHILD_PRIMARY, @@ -174,6 +175,9 @@ static int cbw_init(BlockDriverState *bs, QDict *option= s, Error **errp) return -EINVAL; } =20 + copy_bitmap =3D block_copy_dirty_bitmap(s->bcs); + bdrv_set_dirty_bitmap(copy_bitmap, 0, bdrv_dirty_bitmap_size(copy_bitm= ap)); + return 0; } =20 --=20 2.29.2