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[Qemu-devel] [PATCH V17 05/12] quorum: Add quorum_aio_readv.
From: |
Benoît Canet |
Subject: |
[Qemu-devel] [PATCH V17 05/12] quorum: Add quorum_aio_readv. |
Date: |
Wed, 12 Feb 2014 23:06:32 +0100 |
From: Benoît Canet <address@hidden>
Add code to do num_children reads in parallel and cleanup the structures
afterward.
Signed-off-by: Benoit Canet <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
---
block/quorum.c | 39 ++++++++++++++++++++++++++++++++++++++-
1 file changed, 38 insertions(+), 1 deletion(-)
diff --git a/block/quorum.c b/block/quorum.c
index 197cdca..c7a5d79 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, &acb->qcrs[i].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,
};
--
1.8.3.2
- [Qemu-devel] [PATCH V17 00/12] quorum block filter, Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 02/12] quorum: Create BDRVQuorumState and BlkDriver and do init., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 03/12] quorum: Add quorum_aio_writev and its dependencies., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 01/12] quorum: Create quorum.c, add QuorumChildRequest and QuorumAIOCB., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 05/12] quorum: Add quorum_aio_readv.,
Benoît Canet <=
- [Qemu-devel] [PATCH V17 08/12] quorum: Add quorum_invalidate_cache()., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 04/12] blkverify: Extract qemu_iovec_clone() and qemu_iovec_compare() from blkverify., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 12/12] quorum: Add unit test., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 07/12] quorum: Add quorum_getlength()., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 10/12] quorum: Implement recursive .bdrv_recurse_is_first_non_filter in quorum., Benoît Canet, 2014/02/12
- [Qemu-devel] [PATCH V17 09/12] quorum: Add quorum_co_flush()., Benoît Canet, 2014/02/12