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| author | Stefan Hajnoczi | 2013-06-24 17:13:10 +0200 |
|---|---|---|
| committer | Kevin Wolf | 2013-06-28 09:20:26 +0200 |
| commit | d616b224745b2c522f965cf8de7da17b553b959a (patch) | |
| tree | df5c6f5b8e13823d4c202782eec90c93b55997a6 /blockdev.c | |
| parent | notify: add NotiferWithReturn so notifier list can abort (diff) | |
| download | qemu-d616b224745b2c522f965cf8de7da17b553b959a.tar.gz qemu-d616b224745b2c522f965cf8de7da17b553b959a.tar.xz qemu-d616b224745b2c522f965cf8de7da17b553b959a.zip | |
block: add bdrv_add_before_write_notifier()
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.
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'blockdev.c')
0 files changed, 0 insertions, 0 deletions