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quorum: implement .bdrv_detach/attach_aio_context()

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Implement .bdrv_detach/attach_aio_context() interfaces to propagate
detach/attach to BDRVQuorumState->bs[] children.  The block layer takes
care of ->file and ->backing_hd but doesn't know about our ->bs[]
BlockDriverStates, which is also part of the graph.

Reviewed-by: Benoît Canet <benoit.canet@irqsave.net>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2014-05-08 16:34:46 +02:00
parent a8c868c386
commit e3625d3d6a
1 changed files with 36 additions and 12 deletions
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48
block/quorum.c
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@ -848,25 +848,49 @@ static void quorum_close(BlockDriverState *bs)
g_free(s->bs);
}
static void quorum_detach_aio_context(BlockDriverState *bs)
{
BDRVQuorumState *s = bs->opaque;
int i;
for (i = 0; i < s->num_children; i++) {
bdrv_detach_aio_context(s->bs[i]);
}
}
static void quorum_attach_aio_context(BlockDriverState *bs,
AioContext *new_context)
{
BDRVQuorumState *s = bs->opaque;
int i;
for (i = 0; i < s->num_children; i++) {
bdrv_attach_aio_context(s->bs[i], new_context);
}
}
static BlockDriver bdrv_quorum = {
.format_name = "quorum",
.protocol_name = "quorum",
.format_name = "quorum",
.protocol_name = "quorum",
.instance_size = sizeof(BDRVQuorumState),
.instance_size = sizeof(BDRVQuorumState),
.bdrv_file_open = quorum_open,
.bdrv_close = quorum_close,
.bdrv_file_open = quorum_open,
.bdrv_close = quorum_close,
.bdrv_co_flush_to_disk = quorum_co_flush,
.bdrv_co_flush_to_disk = quorum_co_flush,
.bdrv_getlength = quorum_getlength,
.bdrv_getlength = quorum_getlength,
.bdrv_aio_readv = quorum_aio_readv,
.bdrv_aio_writev = quorum_aio_writev,
.bdrv_invalidate_cache = quorum_invalidate_cache,
.bdrv_aio_readv = quorum_aio_readv,
.bdrv_aio_writev = quorum_aio_writev,
.bdrv_invalidate_cache = quorum_invalidate_cache,
.is_filter = true,
.bdrv_recurse_is_first_non_filter = quorum_recurse_is_first_non_filter,
.bdrv_detach_aio_context = quorum_detach_aio_context,
.bdrv_attach_aio_context = quorum_attach_aio_context,
.is_filter = true,
.bdrv_recurse_is_first_non_filter = quorum_recurse_is_first_non_filter,
};
static void bdrv_quorum_init(void)