Message ID | 20210804131750.127574-11-vsementsov@virtuozzo.com |
---|---|
State | New |
Headers | show
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dkim=none (message not signed) header.d=none;nongnu.org; dmarc=none action=none header.from=virtuozzo.com; Received: from AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) by AS8PR08MB6216.eurprd08.prod.outlook.com (2603:10a6:20b:29c::14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4373.21; Wed, 4 Aug 2021 13:18:15 +0000 Received: from AM7PR08MB5494.eurprd08.prod.outlook.com ([fe80::44b9:68ac:bdc7:e23c]) by AM7PR08MB5494.eurprd08.prod.outlook.com ([fe80::44b9:68ac:bdc7:e23c%8]) with mapi id 15.20.4373.026; Wed, 4 Aug 2021 13:18:14 +0000 From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> To: qemu-block@nongnu.org Cc: qemu-devel@nongnu.org, eblake@redhat.com, mreitz@redhat.com, vsementsov@virtuozzo.com, jsnow@redhat.com, kwolf@redhat.com Subject: [PATCH 10/11] block/copy-before-write: add cbw_snapshot_discard() Date: Wed, 4 Aug 2021 16:17:49 +0300 Message-Id: <20210804131750.127574-11-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210804131750.127574-1-vsementsov@virtuozzo.com> References: <20210804131750.127574-1-vsementsov@virtuozzo.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: HE1P192CA0003.EURP192.PROD.OUTLOOK.COM (2603:10a6:3:fe::13) To AM7PR08MB5494.eurprd08.prod.outlook.com (2603:10a6:20b:dc::15) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from localhost.localdomain (185.215.60.211) by HE1P192CA0003.EURP192.PROD.OUTLOOK.COM (2603:10a6:3:fe::13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4394.15 via Frontend Transport; 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Series |
Make image fleecing more usable
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expand
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diff --git a/block/copy-before-write.h b/block/copy-before-write.h index a7e286620c..5809ffc7d0 100644 --- a/block/copy-before-write.h +++ b/block/copy-before-write.h @@ -40,5 +40,6 @@ void bdrv_cbw_drop(BlockDriverState *bs); int cbw_snapshot_read_lock(BlockDriverState *bs, int64_t offset, int64_t bytes, const BlockReq **req, int64_t *pnum); void cbw_snapshot_read_unlock(BlockDriverState *bs, const BlockReq *req); +void cbw_snapshot_discard(BlockDriverState *bs, int64_t offset, int64_t bytes); #endif /* COPY_BEFORE_WRITE_H */ diff --git a/block/copy-before-write.c b/block/copy-before-write.c index a96131358e..a9fc8e34e9 100644 --- a/block/copy-before-write.c +++ b/block/copy-before-write.c @@ -103,6 +103,17 @@ void cbw_snapshot_read_unlock(BlockDriverState *bs, const BlockReq *req) drop_read_req(s, (BlockReq *)req); } +void cbw_snapshot_discard(BlockDriverState *bs, int64_t offset, int64_t bytes) +{ + BDRVCopyBeforeWriteState *s = bs->opaque; + + WITH_QEMU_LOCK_GUARD(&s->lock) { + bdrv_reset_dirty_bitmap(s->access_bitmap, offset, bytes); + } + + block_copy_reset(s->bcs, offset, bytes); +} + static coroutine_fn int cbw_co_preadv( BlockDriverState *bs, uint64_t offset, uint64_t bytes, QEMUIOVector *qiov, int flags)
To be used soon. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> --- block/copy-before-write.h | 1 + block/copy-before-write.c | 11 +++++++++++ 2 files changed, 12 insertions(+)