提交 65d6b3d8 编写于 作者: K Kevin Wolf 提交者: Anthony Liguori

block: Use new AsyncContext for bdrv_read/write emulation

bdrv_read/write emulation is used as the perfect example why we need something
like AsyncContexts. So maybe they better start using it.
Signed-off-by: NKevin Wolf <kwolf@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
上级 9a1e9481
......@@ -1696,19 +1696,26 @@ static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num,
struct iovec iov;
QEMUIOVector qiov;
async_context_push();
async_ret = NOT_DONE;
iov.iov_base = (void *)buf;
iov.iov_len = nb_sectors * 512;
qemu_iovec_init_external(&qiov, &iov, 1);
acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors,
bdrv_rw_em_cb, &async_ret);
if (acb == NULL)
return -1;
if (acb == NULL) {
async_ret = -1;
goto fail;
}
while (async_ret == NOT_DONE) {
qemu_aio_wait();
}
fail:
async_context_pop();
return async_ret;
}
......@@ -1720,17 +1727,24 @@ static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num,
struct iovec iov;
QEMUIOVector qiov;
async_context_push();
async_ret = NOT_DONE;
iov.iov_base = (void *)buf;
iov.iov_len = nb_sectors * 512;
qemu_iovec_init_external(&qiov, &iov, 1);
acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors,
bdrv_rw_em_cb, &async_ret);
if (acb == NULL)
return -1;
if (acb == NULL) {
async_ret = -1;
goto fail;
}
while (async_ret == NOT_DONE) {
qemu_aio_wait();
}
fail:
async_context_pop();
return async_ret;
}
......
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