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| author | Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> | 2019-09-20 11:25:43 +0300 |
|---|---|---|
| committer | John Snow <jsnow@redhat.com> | 2019-10-17 17:02:32 -0400 |
| commit | d2c3080e41fd2c9bc36c996cc9d33804462ba803 (patch) | |
| tree | faa16eec6452d036d5762ca0329a4ecdcb0b1ab2 /scripts/qapi/source.py | |
| parent | b56a1e31759b750e111b4dd35171007bf493fc89 (diff) | |
| download | focaccia-qemu-d2c3080e41fd2c9bc36c996cc9d33804462ba803.tar.gz focaccia-qemu-d2c3080e41fd2c9bc36c996cc9d33804462ba803.zip | |
block/qcow2: proper locking on bitmap add/remove paths
qmp_block_dirty_bitmap_add and do_block_dirty_bitmap_remove do acquire aio context since 0a6c86d024c52b. But this is not enough: we also must lock qcow2 mutex when access in-image metadata. Especially it concerns freeing qcow2 clusters. To achieve this, move qcow2_can_store_new_dirty_bitmap and qcow2_remove_persistent_dirty_bitmap to coroutine context. Since we work in coroutines in correct aio context, we don't need context acquiring in blockdev.c anymore, drop it. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: John Snow <jsnow@redhat.com> Message-id: 20190920082543.23444-4-vsementsov@virtuozzo.com Signed-off-by: John Snow <jsnow@redhat.com>
Diffstat (limited to 'scripts/qapi/source.py')
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