diff mbox

[v12,06/19] block: Check blockers in all nodes involved in a block-commit job

Message ID ae4744164bcb2d9d441806b86d33d10c2540c97c.1477476553.git.berto@igalia.com (mailing list archive)
State New, archived
Headers show

Commit Message

Alberto Garcia Oct. 26, 2016, 10:29 a.m. UTC
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 <berto@igalia.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
---
 blockdev.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)
diff mbox

Patch

diff --git a/blockdev.c b/blockdev.c
index d11a74f..de5b5f5 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);