Ping....
On 03/11/2016 06:34 PM, Changlong Xie wrote: > 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/2016-03/msg02319.html > > Patch status: > 1. Acked patches: none > 2. Reviewed patches: patch 4 > 3. Updated patches: patch 7, 8 > > You can get the patch here: > https://github.com/Pating/qemu/tree/changlox/block-replication-v16 > > You can get the patch with framework here: > https://github.com/Pating/qemu/tree/changlox/colo_framework_v15 > > TODO: > 1. Continuous block replication. It will be started after basic functions > are accepted. > > Changs Log: > V16: > 1. Rebase to the newest codes > 2. Address comments from Stefan & hailiang > p3: we don't need this patch now > p4: add "top-id" parameters for secondary > p6: fix NULL pointer in replication callbacks, remove unnecessary typedefs, > add doc comments that explain the semantics of Replication > p7: Refactor AioContext for thread-safe, remove unnecessary get_top_bs() > *Note*: I'm working on replication testcase now, will send out in V17 > V15: > 1. Rebase to the newest codes > 2. Fix typos and coding style addresed Eric's comments > 3. Address Stefan's comments > 1) Make backup_do_checkpoint public, drop the changes on BlockJobDriver > 2) Update the message and description for [PATCH 4/9] > 3) Make replication_(start/stop/do_checkpoint)_all as global interfaces > 4) Introduce AioContext lock to protect start/stop/do_checkpoint callbacks > 5) Use BdrvChild instead of holding on to BlockDriverState * pointers > 4. Clear BDRV_O_INACTIVE for hidden disk's open_flags since commit 09e0c771 > 5. Introduce replication_get_error_all to check replication status > 6. Remove useless discard interface > 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 > > Changlong Xie (1): > Introduce new APIs to do replication operation > > Wen Congyang (7): > unblock backup operations in backing file > Backup: clear all bitmap when doing block checkpoint > Link backup into block core > docs: block replication's description > auto complete active commit > Implement new driver for block replication > support replication driver in blockdev-add > > Makefile.objs | 1 + > block.c | 18 ++ > block/Makefile.objs | 3 +- > block/backup.c | 15 ++ > block/mirror.c | 13 +- > block/replication.c | 619 > +++++++++++++++++++++++++++++++++++++++++++++ > blockdev.c | 2 +- > docs/block-replication.txt | 238 +++++++++++++++++ > include/block/block_int.h | 5 +- > qapi/block-core.json | 33 ++- > qemu-img.c | 2 +- > replication.c | 94 +++++++ > replication.h | 175 +++++++++++++ > 13 files changed, 1208 insertions(+), 10 deletions(-) > create mode 100644 block/replication.c > create mode 100644 docs/block-replication.txt > create mode 100644 replication.c > create mode 100644 replication.h >
