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[Qemu-devel] [RFC V3 8/9] quorum: Add quorum_aio_readv.
From: |
Benoît Canet |
Subject: |
[Qemu-devel] [RFC V3 8/9] quorum: Add quorum_aio_readv. |
Date: |
Tue, 14 Aug 2012 16:14:10 +0200 |
Signed-off-by: Benoit Canet <address@hidden>
---
block/quorum.c | 35 ++++++++++++++++++++++++++++++++++-
1 file changed, 34 insertions(+), 1 deletion(-)
diff --git a/block/quorum.c b/block/quorum.c
index 86962b4..8b449fb 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -190,10 +190,16 @@ static void quorum_aio_bh(void *opaque)
{
QuorumAIOCB *acb = opaque;
BDRVQuorumState *s = acb->bqs;
- int ret;
+ int i, ret;
ret = s->n <= acb->success_count ? 0 : -EIO;
+ for (i = 0; i < s->m; i++) {
+ qemu_vfree(acb->aios[i].buf);
+ acb->aios[i].buf = NULL;
+ acb->aios[i].ret = 0;
+ }
+
qemu_bh_delete(acb->bh);
acb->common.cb(acb->common.opaque, ret);
if (acb->finished) {
@@ -258,6 +264,32 @@ static void quorum_aio_cb(void *opaque, int ret)
qemu_bh_schedule(acb->bh);
}
+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;
+
+ for (i = 0; i < s->m; i++) {
+ acb->aios[i].buf = qemu_blockalign(bs->file, qiov->size);
+ qemu_iovec_init(&acb->qiovs[i], qiov->niov);
+ qemu_iovec_clone(&acb->qiovs[i], qiov, acb->aios[i].buf);
+ }
+
+ for (i = 0; i < s->m; i++) {
+ bdrv_aio_readv(s->bs[i], sector_num, qiov, nb_sectors,
+ quorum_aio_cb, &acb->aios[i]);
+ }
+
+ return &acb->common;
+}
+
static BlockDriverAIOCB *quorum_aio_writev(BlockDriverState *bs,
int64_t sector_num,
QEMUIOVector *qiov,
@@ -306,6 +338,7 @@ static BlockDriver bdrv_quorum = {
.bdrv_close = quorum_close,
.bdrv_co_flush_to_disk = quorum_co_flush,
+ .bdrv_aio_readv = quorum_aio_readv,
.bdrv_aio_writev = quorum_aio_writev,
};
--
1.7.9.5
- [Qemu-devel] [RFC V3 5/9] quorum: Add quorum_aio_writev and its dependencies., (continued)
- [Qemu-devel] [RFC V3 5/9] quorum: Add quorum_aio_writev and its dependencies., Benoît Canet, 2012/08/14
- [Qemu-devel] [RFC V3 6/9] blkverify: Extract qemu_iovec_clone() and qemu_iovec_compare() from blkverify., Benoît Canet, 2012/08/14
- [Qemu-devel] [RFC V3 2/9] quorum: Create BDRVQuorumState and BlkDriver and do init., Benoît Canet, 2012/08/14
- [Qemu-devel] [RFC V3 4/9] quorum: Add quorum_getlength()., Benoît Canet, 2012/08/14
- [Qemu-devel] [RFC V3 7/9] quorum: Add quorum_co_flush()., Benoît Canet, 2012/08/14
- [Qemu-devel] [RFC V3 9/9] quorum: Add quorum mechanism., Benoît Canet, 2012/08/14
- [Qemu-devel] [RFC V3 8/9] quorum: Add quorum_aio_readv.,
Benoît Canet <=
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Blue Swirl, 2012/08/14
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Stefan Hajnoczi, 2012/08/15
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Benoît Canet, 2012/08/20
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Stefan Hajnoczi, 2012/08/20
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Stefan Hajnoczi, 2012/08/20
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Benoît Canet, 2012/08/20
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Stefan Hajnoczi, 2012/08/20
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Benoît Canet, 2012/08/20
- Re: [Qemu-devel] [RFC V3 0/9] Quorum disk image corruption resiliency, Stefan Hajnoczi, 2012/08/20