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authorBenoƮt Canet <benoit@irqsave.net>2014-02-21 22:21:14 +0100
committerKevin Wolf <kwolf@redhat.com>2014-02-21 22:29:49 +0100
commit7db6982a19f61e3668397b5e31ebfb16a477c414 (patch)
tree9733769d83a38e50a1a6f4e587296e562233bc09 /block
parentf70d7f7e4d05b7a7797815afdcb83f4375740838 (diff)
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quorum: Add quorum_aio_readv.
Add code to do num_children reads in parallel and cleanup the structures afterwards. Signed-off-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/quorum.c39
1 files changed, 38 insertions, 1 deletions
diff --git a/block/quorum.c b/block/quorum.c
index 99e0e03..fd19662 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -91,10 +91,18 @@ static AIOCBInfo quorum_aiocb_info = {
static void quorum_aio_finalize(QuorumAIOCB *acb)
{
- int ret = 0;
+ BDRVQuorumState *s = acb->common.bs->opaque;
+ int i, ret = 0;
acb->common.cb(acb->common.opaque, ret);
+ if (acb->is_read) {
+ for (i = 0; i < s->num_children; i++) {
+ qemu_vfree(acb->qcrs[i].buf);
+ qemu_iovec_destroy(&acb->qcrs[i].qiov);
+ }
+ }
+
g_free(acb->qcrs);
qemu_aio_release(acb);
}
@@ -149,6 +157,34 @@ static void quorum_aio_cb(void *opaque, int ret)
quorum_aio_finalize(acb);
}
+static BlockDriverAIOCB *quorum_aio_readv(BlockDriverState *bs,
+ int64_t sector_num,
+ QEMUIOVector *qiov,
+ int nb_sectors,
+ BlockDriverCompletionFunc *cb,
+ void *opaque)
+{
+ BDRVQuorumState *s = bs->opaque;
+ QuorumAIOCB *acb = quorum_aio_get(s, bs, qiov, sector_num,
+ nb_sectors, cb, opaque);
+ int i;
+
+ acb->is_read = true;
+
+ for (i = 0; i < s->num_children; i++) {
+ acb->qcrs[i].buf = qemu_blockalign(s->bs[i], qiov->size);
+ qemu_iovec_init(&acb->qcrs[i].qiov, qiov->niov);
+ qemu_iovec_clone(&acb->qcrs[i].qiov, qiov, acb->qcrs[i].buf);
+ }
+
+ for (i = 0; i < s->num_children; i++) {
+ bdrv_aio_readv(s->bs[i], sector_num, qiov, nb_sectors,
+ quorum_aio_cb, &acb->qcrs[i]);
+ }
+
+ return &acb->common;
+}
+
static BlockDriverAIOCB *quorum_aio_writev(BlockDriverState *bs,
int64_t sector_num,
QEMUIOVector *qiov,
@@ -176,6 +212,7 @@ static BlockDriver bdrv_quorum = {
.instance_size = sizeof(BDRVQuorumState),
+ .bdrv_aio_readv = quorum_aio_readv,
.bdrv_aio_writev = quorum_aio_writev,
};