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Re: [Qemu-devel] [PATCH v5 02/11] block: add bdrv_add_before_write_notif
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH v5 02/11] block: add bdrv_add_before_write_notifier() |
Date: |
Thu, 30 May 2013 16:47:39 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
On 05/30/2013 06:34 AM, Stefan Hajnoczi wrote:
> The bdrv_add_before_write_notifier() function installs a callback that
> is invoked before a write request is processed. This will be used to
> implement copy-on-write point-in-time snapshots where we need to copy
> out old data before overwriting it.
>
> Note that BdrvTrackedRequest is moved to block_int.h since it is passed
> to .notify() functions.
>
> Signed-off-by: Stefan Hajnoczi <address@hidden>
> ---
> block.c | 23 ++++++++++++-----------
> include/block/block_int.h | 23 ++++++++++++++++++++++-
> 2 files changed, 34 insertions(+), 12 deletions(-)
Reviewed-by: Eric Blake <address@hidden>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- Re: [Qemu-devel] [PATCH v5 08/11] blockdev: allow BdrvActionOps->commit() to be NULL, (continued)
- [Qemu-devel] [PATCH v5 09/11] blockdev: add DriveBackup transaction, Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 10/11] blockdev: add Abort transaction, Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 04/11] blockdev: drop redundant proto_drv check, Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 07/11] blockdev: rename BlkTransactionStates to singular, Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 05/11] blockdev: use bdrv_getlength() in qmp_drive_mirror(), Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 02/11] block: add bdrv_add_before_write_notifier(), Stefan Hajnoczi, 2013/05/30
- Re: [Qemu-devel] [PATCH v5 02/11] block: add bdrv_add_before_write_notifier(),
Eric Blake <=
- [Qemu-devel] [PATCH v5 11/11] qemu-iotests: add 055 drive-backup test case, Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 01/11] notify: add NotiferWithReturn so notifier list can abort, Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 06/11] block: add drive-backup QMP command, Stefan Hajnoczi, 2013/05/30
- [Qemu-devel] [PATCH v5 03/11] block: add basic backup support to block driver, Stefan Hajnoczi, 2013/05/30