Revision c87c0672 block-qcow.c
| b/block-qcow.c | ||
|---|---|---|
| 530 | 530 |
int n; |
| 531 | 531 |
uint64_t cluster_offset; |
| 532 | 532 |
uint8_t *cluster_data; |
| 533 |
struct iovec hd_iov; |
|
| 534 |
QEMUIOVector hd_qiov; |
|
| 533 | 535 |
BlockDriverAIOCB *hd_aiocb; |
| 534 | 536 |
} QCowAIOCB; |
| 535 | 537 |
|
| ... | ... | |
| 584 | 586 |
if (!acb->cluster_offset) {
|
| 585 | 587 |
if (bs->backing_hd) {
|
| 586 | 588 |
/* read from the base image */ |
| 587 |
acb->hd_aiocb = bdrv_aio_read(bs->backing_hd, |
|
| 588 |
acb->sector_num, acb->buf, acb->n, qcow_aio_read_cb, acb); |
|
| 589 |
acb->hd_iov.iov_base = acb->buf; |
|
| 590 |
acb->hd_iov.iov_len = acb->n * 512; |
|
| 591 |
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1); |
|
| 592 |
acb->hd_aiocb = bdrv_aio_readv(bs->backing_hd, acb->sector_num, |
|
| 593 |
&acb->hd_qiov, acb->n, qcow_aio_read_cb, acb); |
|
| 589 | 594 |
if (acb->hd_aiocb == NULL) |
| 590 | 595 |
goto fail; |
| 591 | 596 |
} else {
|
| ... | ... | |
| 605 | 610 |
ret = -EIO; |
| 606 | 611 |
goto fail; |
| 607 | 612 |
} |
| 608 |
acb->hd_aiocb = bdrv_aio_read(s->hd, |
|
| 613 |
acb->hd_iov.iov_base = acb->buf; |
|
| 614 |
acb->hd_iov.iov_len = acb->n * 512; |
|
| 615 |
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1); |
|
| 616 |
acb->hd_aiocb = bdrv_aio_readv(s->hd, |
|
| 609 | 617 |
(acb->cluster_offset >> 9) + index_in_cluster, |
| 610 |
acb->buf, acb->n, qcow_aio_read_cb, acb);
|
|
| 618 |
&acb->hd_qiov, acb->n, qcow_aio_read_cb, acb);
|
|
| 611 | 619 |
if (acb->hd_aiocb == NULL) |
| 612 | 620 |
goto fail; |
| 613 | 621 |
} |
| ... | ... | |
| 687 | 695 |
} else {
|
| 688 | 696 |
src_buf = acb->buf; |
| 689 | 697 |
} |
| 690 |
acb->hd_aiocb = bdrv_aio_write(s->hd, |
|
| 691 |
(cluster_offset >> 9) + index_in_cluster, |
|
| 692 |
src_buf, acb->n, |
|
| 693 |
qcow_aio_write_cb, acb); |
|
| 698 |
|
|
| 699 |
acb->hd_iov.iov_base = (void *)src_buf; |
|
| 700 |
acb->hd_iov.iov_len = acb->n * 512; |
|
| 701 |
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1); |
|
| 702 |
acb->hd_aiocb = bdrv_aio_writev(s->hd, |
|
| 703 |
(cluster_offset >> 9) + index_in_cluster, |
|
| 704 |
&acb->hd_qiov, acb->n, |
|
| 705 |
qcow_aio_write_cb, acb); |
|
| 694 | 706 |
if (acb->hd_aiocb == NULL) |
| 695 | 707 |
goto fail; |
| 696 | 708 |
} |
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