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authorKevin Wolf <kwolf@redhat.com>2017-12-06 17:05:44 +0100
committerKevin Wolf <kwolf@redhat.com>2017-12-22 15:05:32 +0100
commitb0165585900f050f403cecba9d89adeccf35dd6c (patch)
tree82a19acb79e687005a43bdaed32f8c34fdcde05f /qemu-io-cmds.c
parent0152bf400fe3ca7facb382683bfcccda70ebf51a (diff)
downloadfocaccia-qemu-b0165585900f050f403cecba9d89adeccf35dd6c.tar.gz
focaccia-qemu-b0165585900f050f403cecba9d89adeccf35dd6c.zip
block: Add bdrv_subtree_drained_begin/end()
bdrv_drained_begin() waits for the completion of requests in the whole
subtree, but it only actually keeps its immediate bs parameter quiesced
until bdrv_drained_end().

Add a version that keeps the whole subtree drained. As of this commit,
graph changes cannot be allowed during a subtree drained section, but
this will be fixed soon.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-io-cmds.c')
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