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virtio-blk-dataplane: Improve error reporting 

Return an Error so that it can be propagated later.

Tested-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
[AF: Rebased]
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andreas Färber 2013-06-07 16:18:50 +02:00 committed by Paolo Bonzini
parent 06a1307379
commit 3ffeeef735
3 changed files with 32 additions and 18 deletions
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30
hw/block/dataplane/virtio-blk.c
View File

@ -380,8 +380,9 @@ static void start_data_plane_bh(void *opaque)
s, QEMU_THREAD_JOINABLE);
}
bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
VirtIOBlockDataPlane **dataplane)
void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
VirtIOBlockDataPlane **dataplane,
Error **errp)
{
VirtIOBlockDataPlane *s;
int fd;
@ -389,33 +390,35 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
*dataplane = NULL;
if (!blk->data_plane) {
return true;
return;
}
if (blk->scsi) {
error_report("device is incompatible with x-data-plane, use scsi=off");
return false;
error_setg(errp,
"device is incompatible with x-data-plane, use scsi=off");
return;
}
if (blk->config_wce) {
error_report("device is incompatible with x-data-plane, "
"use config-wce=off");
return false;
error_setg(errp, "device is incompatible with x-data-plane, "
"use config-wce=off");
return;
}
/* If dataplane is (re-)enabled while the guest is running there could be
* block jobs that can conflict.
*/
if (bdrv_in_use(blk->conf.bs)) {
error_report("cannot start dataplane thread while device is in use");
return false;
error_setg(errp,
"cannot start dataplane thread while device is in use");
return;
}
fd = raw_get_aio_fd(blk->conf.bs);
if (fd < 0) {
error_report("drive is incompatible with x-data-plane, "
"use format=raw,cache=none,aio=native");
return false;
error_setg(errp, "drive is incompatible with x-data-plane, "
"use format=raw,cache=none,aio=native");
return;
}
s = g_new0(VirtIOBlockDataPlane, 1);
@ -427,7 +430,6 @@ bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
bdrv_set_in_use(blk->conf.bs, 1);
*dataplane = s;
return true;
}
void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s)

5
hw/block/dataplane/virtio-blk.h
View File

@ -19,8 +19,9 @@
typedef struct VirtIOBlockDataPlane VirtIOBlockDataPlane;
bool virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
VirtIOBlockDataPlane **dataplane);
void virtio_blk_data_plane_create(VirtIODevice *vdev, VirtIOBlkConf *blk,
VirtIOBlockDataPlane **dataplane,
Error **errp);
void virtio_blk_data_plane_destroy(VirtIOBlockDataPlane *s);
void virtio_blk_data_plane_start(VirtIOBlockDataPlane *s);
void virtio_blk_data_plane_stop(VirtIOBlockDataPlane *s);

15
hw/block/virtio-blk.c
View File

@ -657,6 +657,7 @@ static void virtio_blk_migration_state_changed(Notifier *notifier, void *data)
VirtIOBlock *s = container_of(notifier, VirtIOBlock,
migration_state_notifier);
MigrationState *mig = data;
Error *err = NULL;
if (migration_in_setup(mig)) {
if (!s->dataplane) {
@ -671,7 +672,11 @@ static void virtio_blk_migration_state_changed(Notifier *notifier, void *data)
}
bdrv_drain_all(); /* complete in-flight non-dataplane requests */
virtio_blk_data_plane_create(VIRTIO_DEVICE(s), &s->blk,
&s->dataplane);
&s->dataplane, &err);
if (err != NULL) {
error_report("%s", error_get_pretty(err));
error_free(err);
}
}
}
#endif /* CONFIG_VIRTIO_BLK_DATA_PLANE */
@ -681,6 +686,9 @@ static int virtio_blk_device_init(VirtIODevice *vdev)
DeviceState *qdev = DEVICE(vdev);
VirtIOBlock *s = VIRTIO_BLK(vdev);
VirtIOBlkConf *blk = &(s->blk);
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
Error *err = NULL;
#endif
static int virtio_blk_id;
if (!blk->conf.bs) {
@ -708,7 +716,10 @@ static int virtio_blk_device_init(VirtIODevice *vdev)
s->vq = virtio_add_queue(vdev, 128, virtio_blk_handle_output);
#ifdef CONFIG_VIRTIO_BLK_DATA_PLANE
if (!virtio_blk_data_plane_create(vdev, blk, &s->dataplane)) {
virtio_blk_data_plane_create(vdev, blk, &s->dataplane, &err);
if (err != NULL) {
error_report("%s", error_get_pretty(err));
error_free(err);
virtio_cleanup(vdev);
return -1;
}