[Xen-changelog] [qemu-xen-3.4-testing] Use vectored aiocb storage to store vector translation state (Avi Kivity)

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

commit db13ae2103aab010584bb54f4a1f269a2755f54c
Author: aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>
Date:   Fri Mar 20 18:26:12 2009 +0000

    Use vectored aiocb storage to store vector translation state (Avi Kivity)
    
    Now that we have a dedicated acb pool for vector translation acbs, we can
    store the vector translation state in the acbs instead of in an external
    structure.
    
    Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
    Signed-off-by: Anthony Liguori <aliguori@xxxxxxxxxx>
    
    git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6873 
c046a42c-6fe2-441c-8c8c-71466251a162
    (cherry picked from commit 3fb94d56c6adc96ffc4a81b58c752cc4ccfae39c)
    (cherry picked from commit 62813efd17d7e04b7b32af38ca3959f82c8d02bc)
---
 block.c |   29 ++++++++++++++---------------
 1 files changed, 14 insertions(+), 15 deletions(-)

diff --git a/block.c b/block.c
index 0d15fdd..701a56b 100644
--- a/block.c
+++ b/block.c
@@ -1363,31 +1363,32 @@ char *bdrv_snapshot_dump(char *buf, int buf_size, 
QEMUSnapshotInfo *sn)
 /**************************************************************/
 /* async I/Os */
 
-typedef struct VectorTranslationState {
+typedef struct VectorTranslationAIOCB {
+    BlockDriverAIOCB common;
     QEMUIOVector *iov;
     uint8_t *bounce;
     int is_write;
     BlockDriverAIOCB *aiocb;
-    BlockDriverAIOCB *this_aiocb;
-} VectorTranslationState;
+} VectorTranslationAIOCB;
 
-static void bdrv_aio_cancel_vector(BlockDriverAIOCB *acb)
+static void bdrv_aio_cancel_vector(BlockDriverAIOCB *_acb)
 {
-    VectorTranslationState *s = acb->opaque;
+    VectorTranslationAIOCB *acb
+        = container_of(_acb, VectorTranslationAIOCB, common);
 
-    bdrv_aio_cancel(s->aiocb);
+    bdrv_aio_cancel(acb->aiocb);
 }
 
 static void bdrv_aio_rw_vector_cb(void *opaque, int ret)
 {
-    VectorTranslationState *s = opaque;
+    VectorTranslationAIOCB *s = (VectorTranslationAIOCB *)opaque;
 
     if (!s->is_write) {
         qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size);
     }
     qemu_vfree(s->bounce);
-    s->this_aiocb->cb(s->this_aiocb->opaque, ret);
-    qemu_aio_release(s->this_aiocb);
+    s->common.cb(s->common.opaque, ret);
+    qemu_aio_release(s);
 }
 
 static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs,
@@ -1399,11 +1400,9 @@ static BlockDriverAIOCB 
*bdrv_aio_rw_vector(BlockDriverState *bs,
                                             int is_write)
 
 {
-    VectorTranslationState *s = qemu_mallocz(sizeof(*s));
-    BlockDriverAIOCB *aiocb = qemu_aio_get_pool(&vectored_aio_pool, bs,
-                                                cb, opaque);
+    VectorTranslationAIOCB *s = qemu_aio_get_pool(&vectored_aio_pool, bs,
+                                                  cb, opaque);
 
-    s->this_aiocb = aiocb;
     s->iov = iov;
     s->bounce = qemu_memalign(512, nb_sectors * 512);
     s->is_write = is_write;
@@ -1415,7 +1414,7 @@ static BlockDriverAIOCB 
*bdrv_aio_rw_vector(BlockDriverState *bs,
         s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors,
                                  bdrv_aio_rw_vector_cb, s);
     }
-    return aiocb;
+    return &s->common;
 }
 
 BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
@@ -1616,7 +1615,7 @@ static BlockDriverAIOCB 
*bdrv_aio_flush_em(BlockDriverState *bs,
 
 void bdrv_init(void)
 {
-    aio_pool_init(&vectored_aio_pool, sizeof(BlockDriverAIOCB),
+    aio_pool_init(&vectored_aio_pool, sizeof(VectorTranslationAIOCB),
                   bdrv_aio_cancel_vector);
 
     bdrv_register(&bdrv_raw);
--
generated by git-patchbot for /home/xen/git/qemu-xen-3.4-testing.git

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