From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37568) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aJHZR-0004mX-Kp for qemu-devel@nongnu.org; Wed, 13 Jan 2016 04:18:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aJHZN-0001DS-AE for qemu-devel@nongnu.org; Wed, 13 Jan 2016 04:18:25 -0500 Received: from [59.151.112.132] (port=13669 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aJHZM-0001B2-Ji for qemu-devel@nongnu.org; Wed, 13 Jan 2016 04:18:21 -0500 From: Changlong Xie Date: Wed, 13 Jan 2016 17:18:24 +0800 Message-ID: <1452676712-24239-1-git-send-email-xiecl.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v14 0/8] Block replication for continuous checkpoints List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu devel , Fam Zheng , Max Reitz , Paolo Bonzini , Kevin Wolf , Stefan Hajnoczi Cc: fnstml-hwcolo@cn.fujitsu.com Block replication is a very important feature which is used for continuous checkpoints(for example: COLO). You can get the detailed information about block replication from here: http://wiki.qemu.org/Features/BlockReplication Usage: Please refer to docs/block-replication.txt This patch series is based on the following patch series: 1. http://lists.nongnu.org/archive/html/qemu-devel/2015-12/msg04570.html You can get the patch here: https://github.com/Pating/qemu/tree/changlox/block-replication-v14 You can get the patch with framework here: https://github.com/Pating/qemu/tree/changlox/colo_framework_v13 TODO: 1. Continuous block replication. It will be started after basic functions are accepted. Changs Log: V14: 1. Implement auto complete active commit 2. Implement active commit block job for replication.c 3. Address the comments from Stefan, add replication-specific API and data structure, also remove old block layer APIs V13: 1. Rebase to the newest codes 2. Remove redundant marcos and semicolon in replication.c 3. Fix typos in block-replication.txt V12: 1. Rebase to the newest codes 2. Use backing reference to replcace 'allow-write-backing-file' V11: 1. Reopen the backing file when starting blcok replication if it is not opened in R/W mode 2. Unblock BLOCK_OP_TYPE_BACKUP_SOURCE and BLOCK_OP_TYPE_BACKUP_TARGET when opening backing file 3. Block the top BDS so there is only one block job for the top BDS and its backing chain. V10: 1. Use blockdev-remove-medium and blockdev-insert-medium to replace backing reference. 2. Address the comments from Eric Blake V9: 1. Update the error messages 2. Rebase to the newest qemu 3. Split child add/delete support. These patches are sent in another patchset. V8: 1. Address Alberto Garcia's comments V7: 1. Implement adding/removing quorum child. Remove the option non-connect. 2. Simplify the backing refrence option according to Stefan Hajnoczi's suggestion V6: 1. Rebase to the newest qemu. V5: 1. Address the comments from Gong Lei 2. Speed the failover up. The secondary vm can take over very quickly even if there are too many I/O requests. V4: 1. Introduce a new driver replication to avoid touch nbd and qcow2. V3: 1: use error_setg() instead of error_set() 2. Add a new block job API 3. Active disk, hidden disk and nbd target uses the same AioContext 4. Add a testcase to test new hbitmap API V2: 1. Redesign the secondary qemu(use image-fleecing) 2. Use Error objects to return error message 3. Address the comments from Max Reitz and Eric Blake Wen Congyang (8): unblock backup operations in backing file Store parent BDS in BdrvChild Backup: clear all bitmap when doing block checkpoint Allow creating backup jobs when opening BDS docs: block replication's description auto complete active commit Implement new driver for block replication support replication driver in blockdev-add block.c | 19 ++ block/Makefile.objs | 3 +- block/backup.c | 14 + block/mirror.c | 13 +- block/replication-comm.c | 66 +++++ block/replication.c | 590 +++++++++++++++++++++++++++++++++++++++ blockdev.c | 2 +- blockjob.c | 11 + docs/block-replication.txt | 229 +++++++++++++++ include/block/block_int.h | 4 +- include/block/blockjob.h | 12 + include/block/replication-comm.h | 50 ++++ qapi/block-core.json | 33 ++- qemu-img.c | 2 +- 14 files changed, 1038 insertions(+), 10 deletions(-) create mode 100644 block/replication-comm.c create mode 100644 block/replication.c create mode 100644 docs/block-replication.txt create mode 100644 include/block/replication-comm.h -- 1.9.3