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block/qcow: Don't ignore immediate read/write and other failures 

This patch is similar to 171e3d6b99
which fixed qcow2:

Returning -EIO is far from optimal, but at least it's an error code.

In addition to read/write failures, -EIO is also returned when
decompress_cluster failed.

Cc: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Weil 2011-02-19 22:18:12 +01:00 committed by Kevin Wolf
parent 40a892b78c
commit 5614c188c6
1 changed files with 12 additions and 4 deletions
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16
block/qcow.c
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@ -589,8 +589,10 @@ static void qcow_aio_read_cb(void *opaque, int ret)
qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
acb->hd_aiocb = bdrv_aio_readv(bs->backing_hd, acb->sector_num,
&acb->hd_qiov, acb->n, qcow_aio_read_cb, acb);
if (acb->hd_aiocb == NULL)
if (acb->hd_aiocb == NULL) {
ret = -EIO;
goto done;
}
} else {
/* Note: in this case, no need to wait */
memset(acb->buf, 0, 512 * acb->n);
@ -598,8 +600,10 @@ static void qcow_aio_read_cb(void *opaque, int ret)
}
} else if (acb->cluster_offset & QCOW_OFLAG_COMPRESSED) {
/* add AIO support for compressed blocks ? */
if (decompress_cluster(bs, acb->cluster_offset) < 0)
if (decompress_cluster(bs, acb->cluster_offset) < 0) {
ret = -EIO;
goto done;
}
memcpy(acb->buf,
s->cluster_cache + index_in_cluster * 512, 512 * acb->n);
goto redo;
@ -614,8 +618,10 @@ static void qcow_aio_read_cb(void *opaque, int ret)
acb->hd_aiocb = bdrv_aio_readv(bs->file,
(acb->cluster_offset >> 9) + index_in_cluster,
&acb->hd_qiov, acb->n, qcow_aio_read_cb, acb);
if (acb->hd_aiocb == NULL)
if (acb->hd_aiocb == NULL) {
ret = -EIO;
goto done;
}
}
return;
@ -700,8 +706,10 @@ static void qcow_aio_write_cb(void *opaque, int ret)
(cluster_offset >> 9) + index_in_cluster,
&acb->hd_qiov, acb->n,
qcow_aio_write_cb, acb);
if (acb->hd_aiocb == NULL)
if (acb->hd_aiocb == NULL) {
ret = -EIO;
goto done;
}
return;
done: