@@ -287,6 +287,22 @@ static int quorum_sha256_compare(QuorumVoteValue *a, QuorumVoteValue *b)
return memcmp(a, b, HASH_LENGTH);
}
+static int quorum_long_compare(QuorumVoteValue *a, QuorumVoteValue *b)
+{
+ unsigned long i = a->l;
+ unsigned long j = b->l;
+
+ if (i < j) {
+ return -1;
+ }
+
+ if (i > j) {
+ return 1;
+ }
+
+ return 0;
+}
+
static QuorumAIOCB *quorum_aio_get(BDRVQuorumState *s,
BlockDriverState *bs,
QEMUIOVector *qiov,
@@ -679,6 +695,42 @@ static void quorum_invalidate_cache(BlockDriverState *bs)
}
}
+static int coroutine_fn quorum_co_is_allocated(BlockDriverState *bs,
+ int64_t sector_num,
+ int nb_sectors,
+ int *pnum)
+{
+ BDRVQuorumState *s = bs->opaque;
+ QuorumVoteVersion *winner = NULL;
+ QuorumVotes result_votes, num_votes;
+ QuorumVoteValue result_value, num_value;
+ int i, result = 0, num;
+
+ QLIST_INIT(&result_votes.vote_list);
+ QLIST_INIT(&num_votes.vote_list);
+ result_votes.compare = quorum_long_compare;
+ num_votes.compare = quorum_long_compare;
+
+ for (i = 0; i < s->total; i++) {
+ result = bdrv_co_is_allocated(s->bs[i], sector_num, nb_sectors, &num);
+ result_value.l = result;
+ num_value.l = num;
+ quorum_count_vote(&result_votes, &result_value, i);
+ quorum_count_vote(&num_votes, &num_value, i);
+ }
+
+ winner = quorum_get_vote_winner(&result_votes);
+ result = winner->value.l;
+
+ winner = quorum_get_vote_winner(&num_votes);
+ *pnum = winner->value.l;
+
+ quorum_free_vote_list(&result_votes);
+ quorum_free_vote_list(&num_votes);
+
+ return result;
+}
+
static BlockDriver bdrv_quorum = {
.format_name = "quorum",
.protocol_name = "quorum",
@@ -693,6 +745,7 @@ static BlockDriver bdrv_quorum = {
.bdrv_aio_readv = quorum_aio_readv,
.bdrv_aio_writev = quorum_aio_writev,
.bdrv_invalidate_cache = quorum_invalidate_cache,
+ .bdrv_co_is_allocated = quorum_co_is_allocated,
};
static void bdrv_quorum_init(void)
Signed-off-by: Benoit Canet <benoit@irqsave.net> --- block/quorum.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+)