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Backup: don't do copy-on-read in before_write_notifier
authorWen Congyang <[email protected]>
Tue, 8 Sep 2015 03:28:33 +0000 (11:28 +0800)
committerJeff Cody <[email protected]>
Fri, 25 Sep 2015 12:37:07 +0000 (08:37 -0400)
commit06c3916b35a1cf6db548450a0cfb96983c33c82f
tree25f33565d45bed4614ba63dbfc361f74ff153a13tree | snapshot
parent9568b511c9f91c3d21ea3e83426d4ee7168c98bbcommit | diff
Backup: don't do copy-on-read in before_write_notifier

We will copy data in before_write_notifier to do backup.
It is a nested I/O request, so we cannot do copy-on-read.

The steps to reproduce it:
1. -drive copy-on-read=on,...  // qemu option
2. drive_backup -f disk0 /path_to_backup.img // monitor command

Signed-off-by: Wen Congyang <[email protected]>
Tested-by: Jeff Cody <[email protected]>
Message-id: 1441682913[email protected]
Signed-off-by: Jeff Cody <[email protected]>
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