If a blockcommit is aborted the base image remains in RW mode, that leads
to a fail of subsequent live migration.
How to reproduce:
$ virsh snapshot-create-as vm snp1 --disk-only
*** write something to the disk ***
$ virsh blockcommit vm vda --active --shallow && virsh blockjob vm vda
--abort
$ lsof /vzt/vm.qcow2
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
qemu-syst 433203 root 45u REG 253,0 1724776448 133 /vzt/vm.qcow2
$ cat /proc/433203/fdinfo/45
pos: 0
flags: 02140002
Reopen the base image in RO mode in mirror_exit_common() if the blockjob
is aborted.
Signed-off-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
---
block/mirror.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/block/mirror.c b/block/mirror.c
index dcd88de2e3..50a2825b1c 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -789,6 +789,10 @@ static int mirror_exit_common(Job *job)
block_job_remove_all_bdrv(bjob);
bdrv_replace_node(mirror_top_bs, mirror_top_bs->backing->bs,
&error_abort);
+ if (abort && !bdrv_is_read_only(target_bs)) {
+ bdrv_reopen_set_read_only(target_bs, true, NULL);
+ }
+
bs_opaque->job = NULL;
bdrv_drained_end(src);