[Qemu-devel] [PATCH V14 05/13] quorum: Add quorum_aio_readv.

[Benoît Canet]

From: Benoît Canet <address@hidden>

Signed-off-by: Benoit Canet <address@hidden>
Reviewed-by: Max Reitz <address@hidden>
---
 block/quorum.c | 40 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 39 insertions(+), 1 deletion(-)

diff --git a/block/quorum.c b/block/quorum.c
index 7d0f123..5b11ac1 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -101,14 +101,23 @@ static int quorum_get_first_error(QuorumAIOCB *acb)
 static void quorum_aio_finalize(QuorumAIOCB *acb)
 {
     BDRVQuorumState *s = acb->bqs;
-    int ret;
+    int i, ret;
 
     ret = s->threshold <= acb->success_count ? 0 : quorum_get_first_error(acb);
 
+    for (i = 0; i < s->total; i++) {
+        qemu_vfree(acb->aios[i].buf);
+        acb->aios[i].buf = NULL;
+        acb->aios[i].ret = 0;
+    }
+
     acb->common.cb(acb->common.opaque, ret);
     if (acb->finished) {
         *acb->finished = true;
     }
+    for (i = 0; acb->is_read && i < s->total; i++) {
+        qemu_iovec_destroy(&acb->aios[i].qiov);
+    }
     g_free(acb->aios);
     qemu_aio_release(acb);
 }
@@ -164,6 +173,34 @@ 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->total; i++) {
+        acb->aios[i].buf = qemu_blockalign(bs->file, qiov->size);
+        qemu_iovec_init(&acb->aios[i].qiov, qiov->niov);
+        qemu_iovec_clone(&acb->aios[i].qiov, qiov, acb->aios[i].buf);
+    }
+
+    for (i = 0; i < s->total; 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,
@@ -191,6 +228,7 @@ static BlockDriver bdrv_quorum = {
 
     .instance_size      = sizeof(BDRVQuorumState),
 
+    .bdrv_aio_readv     = quorum_aio_readv,
     .bdrv_aio_writev    = quorum_aio_writev,
 };
 
-- 
1.8.3.2