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[Qemu-devel] [PATCH v10 05/16] block: Check blockers in all nodes involv
From: |
Alberto Garcia |
Subject: |
[Qemu-devel] [PATCH v10 05/16] block: Check blockers in all nodes involved in a block-commit job |
Date: |
Thu, 6 Oct 2016 16:02:48 +0300 |
qmp_block_commit() checks for op blockers in the active and
destination (base) images. However all nodes between top_bs and base
are also involved, and they are removed from the chain afterwards.
In addition to that, if top_bs is not the active layer then top_bs's
overlay also needs to be checked because it's involved in the job (its
backing image string needs to be updated to point to 'base').
This patch checks that none of those nodes are blocked.
Signed-off-by: Alberto Garcia <address@hidden>
---
blockdev.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/blockdev.c b/blockdev.c
index 07ec733..f13fc69 100644
--- a/blockdev.c
+++ b/blockdev.c
@@ -3001,6 +3001,7 @@ void qmp_block_commit(bool has_job_id, const char
*job_id, const char *device,
Error **errp)
{
BlockDriverState *bs;
+ BlockDriverState *iter;
BlockDriverState *base_bs, *top_bs;
AioContext *aio_context;
Error *local_err = NULL;
@@ -3067,8 +3068,10 @@ void qmp_block_commit(bool has_job_id, const char
*job_id, const char *device,
assert(bdrv_get_aio_context(base_bs) == aio_context);
- if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
- goto out;
+ for (iter = top_bs; iter != backing_bs(base_bs); iter = backing_bs(iter)) {
+ if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
+ goto out;
+ }
}
/* Do not allow attempts to commit an image into itself */
@@ -3086,6 +3089,10 @@ void qmp_block_commit(bool has_job_id, const char
*job_id, const char *device,
commit_active_start(has_job_id ? job_id : NULL, bs, base_bs, speed,
on_error, block_job_cb, bs, &local_err, false);
} else {
+ BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
+ if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp))
{
+ goto out;
+ }
commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, speed,
on_error, block_job_cb, bs,
has_backing_file ? backing_file : NULL, &local_err);
--
2.9.3
[Qemu-devel] [PATCH v10 05/16] block: Check blockers in all nodes involved in a block-commit job,
Alberto Garcia <=
[Qemu-devel] [PATCH v10 03/16] block: Use block_job_add_bdrv() in mirror_start_job(), Alberto Garcia, 2016/10/06
[Qemu-devel] [PATCH v10 04/16] block: Use block_job_add_bdrv() in backup_start(), Alberto Garcia, 2016/10/06
[Qemu-devel] [PATCH v10 16/16] qemu-iotests: Test streaming to a Quorum child, Alberto Garcia, 2016/10/06