if (bs->backing) {
int64_t nb_cow_sectors = to_allocate * s->tracks;
int64_t nb_cow_bytes = nb_cow_sectors << BDRV_SECTOR_BITS;
- QEMUIOVector qiov;
- struct iovec iov = {
- .iov_len = nb_cow_bytes,
- .iov_base = qemu_blockalign(bs, nb_cow_bytes)
- };
- qemu_iovec_init_external(&qiov, &iov, 1);
-
- ret = bdrv_co_readv(bs->backing, idx * s->tracks, nb_cow_sectors,
- &qiov);
+ QEMUIOVector qiov =
+ QEMU_IOVEC_INIT_BUF(qiov, qemu_blockalign(bs, nb_cow_bytes),
+ nb_cow_bytes);
+
+ ret = bdrv_co_preadv(bs->backing, idx * s->tracks * BDRV_SECTOR_SIZE,
+ nb_cow_bytes, &qiov, 0);
if (ret < 0) {
- qemu_vfree(iov.iov_base);
+ qemu_vfree(qemu_iovec_buf(&qiov));
return ret;
}
- ret = bdrv_co_writev(bs->file, s->data_end, nb_cow_sectors, &qiov);
- qemu_vfree(iov.iov_base);
+ ret = bdrv_co_pwritev(bs->file, s->data_end * BDRV_SECTOR_SIZE,
+ nb_cow_bytes, &qiov, 0);
+ qemu_vfree(qemu_iovec_buf(&qiov));
if (ret < 0) {
return ret;
}
qemu_iovec_reset(&hd_qiov);
qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes);
- ret = bdrv_co_writev(bs->file, position, n, &hd_qiov);
+ ret = bdrv_co_pwritev(bs->file, position * BDRV_SECTOR_SIZE, nbytes,
+ &hd_qiov, 0);
if (ret < 0) {
break;
}
if (position < 0) {
if (bs->backing) {
- ret = bdrv_co_readv(bs->backing, sector_num, n, &hd_qiov);
+ ret = bdrv_co_preadv(bs->backing, sector_num * BDRV_SECTOR_SIZE,
+ nbytes, &hd_qiov, 0);
if (ret < 0) {
break;
}
qemu_iovec_memset(&hd_qiov, 0, 0, nbytes);
}
} else {
- ret = bdrv_co_readv(bs->file, position, n, &hd_qiov);
+ ret = bdrv_co_preadv(bs->file, position * BDRV_SECTOR_SIZE, nbytes,
+ &hd_qiov, 0);
if (ret < 0) {
break;
}