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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Test that drain sections are correctly propagated through the graph.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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If bdrv_do_drained_begin/end() are called in coroutine context, they
first use a BH to get out of the coroutine context. Call some existing
tests again from a coroutine to cover this code path.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Add a subtree drain version to the existing test cases.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Block jobs are already paused using the BdrvChildRole drain callbacks,
so we don't need an additional block_job_pause_all() call.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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Block jobs must be paused if any of the involved nodes are drained.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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This is currently only working correctly for bdrv_drain(), not for
bdrv_drain_all(). Leave a comment for the drain_all case, we'll address
it later.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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The existing test is for bdrv_drain_all_begin/end() only. Generalise the
test case so that it can be run for the other variants as well. At the
moment this is only bdrv_drain_begin/end(), but in a while, we'll add
another one.
Also, add a backing file to the test node to test whether the operations
work recursively.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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This adds a test case that the BlockDriver callbacks for drain are
called in bdrv_drained_all_begin/end(), and that both of them are called
exactly once.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
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