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quorum: Implement recursive .bdrv_recurse_is_first_non_filter in quorum. 

This is used to activate quorum snapshot.

Signed-off-by: Benoit Canet <benoit@irqsave.net>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Benoît Canet 2014-02-21 22:21:19 +01:00 committed by Kevin Wolf
parent 1c508d174d
commit 98a7a38f81
1 changed files with 19 additions and 0 deletions
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19
block/quorum.c
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@ -655,6 +655,23 @@ static coroutine_fn int quorum_co_flush(BlockDriverState *bs)
return result; return result;
} }
static bool quorum_recurse_is_first_non_filter(BlockDriverState *bs,
BlockDriverState *candidate)
{
BDRVQuorumState *s = bs->opaque;
int i;
for (i = 0; i < s->num_children; i++) {
bool perm = bdrv_recurse_is_first_non_filter(s->bs[i],
candidate);
if (perm) {
return true;
}
}
return false;
}
static BlockDriver bdrv_quorum = { static BlockDriver bdrv_quorum = {
.format_name = "quorum", .format_name = "quorum",
.protocol_name = "quorum", .protocol_name = "quorum",
@ -668,6 +685,8 @@ static BlockDriver bdrv_quorum = {
.bdrv_aio_readv = quorum_aio_readv, .bdrv_aio_readv = quorum_aio_readv,
.bdrv_aio_writev = quorum_aio_writev, .bdrv_aio_writev = quorum_aio_writev,
.bdrv_invalidate_cache = quorum_invalidate_cache, .bdrv_invalidate_cache = quorum_invalidate_cache,
.bdrv_recurse_is_first_non_filter = quorum_recurse_is_first_non_filter,
}; };
static void bdrv_quorum_init(void) static void bdrv_quorum_init(void)