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block: switch bdrv_aio_writev() to coroutines 

More sync, aio, and coroutine unification.  Make bdrv_aio_writev() go
through coroutine request processing.

Remove the dirty block callback mechanism which was needed only for aio
processing and can be done more naturally in coroutine context.

Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2011-10-13 13:08:25 +01:00 committed by Kevin Wolf
parent 6b7cb2479b
commit 1a6e115b19
1 changed files with 2 additions and 64 deletions
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66
block.c
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@ -2385,76 +2385,14 @@ BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num,
cb, opaque, false, bdrv_co_do_rw); cb, opaque, false, bdrv_co_do_rw);
} }
typedef struct BlockCompleteData {
BlockDriverCompletionFunc *cb;
void *opaque;
BlockDriverState *bs;
int64_t sector_num;
int nb_sectors;
} BlockCompleteData;
static void block_complete_cb(void *opaque, int ret)
{
BlockCompleteData *b = opaque;
if (b->bs->dirty_bitmap) {
set_dirty_bitmap(b->bs, b->sector_num, b->nb_sectors, 1);
}
b->cb(b->opaque, ret);
g_free(b);
}
static BlockCompleteData *blk_dirty_cb_alloc(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors,
BlockDriverCompletionFunc *cb,
void *opaque)
{
BlockCompleteData *blkdata = g_malloc0(sizeof(BlockCompleteData));
blkdata->bs = bs;
blkdata->cb = cb;
blkdata->opaque = opaque;
blkdata->sector_num = sector_num;
blkdata->nb_sectors = nb_sectors;
return blkdata;
}
BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num,
QEMUIOVector *qiov, int nb_sectors, QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque) BlockDriverCompletionFunc *cb, void *opaque)
{ {
BlockDriver *drv = bs->drv;
BlockDriverAIOCB *ret;
BlockCompleteData *blk_cb_data;
trace_bdrv_aio_writev(bs, sector_num, nb_sectors, opaque); trace_bdrv_aio_writev(bs, sector_num, nb_sectors, opaque);
if (!drv) return bdrv_co_aio_rw_vector(bs, sector_num, qiov, nb_sectors,
return NULL; cb, opaque, true, bdrv_co_do_rw);
if (bs->read_only)
return NULL;
if (bdrv_check_request(bs, sector_num, nb_sectors))
return NULL;
if (bs->dirty_bitmap) {
blk_cb_data = blk_dirty_cb_alloc(bs, sector_num, nb_sectors, cb,
opaque);
cb = &block_complete_cb;
opaque = blk_cb_data;
}
ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors,
cb, opaque);
if (ret) {
if (bs->wr_highest_sector < sector_num + nb_sectors - 1) {
bs->wr_highest_sector = sector_num + nb_sectors - 1;
}
}
return ret;
} }