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authorAndreas Färber <afaerber@suse.de>2013-06-07 16:18:50 +0200
committerPaolo Bonzini <pbonzini@redhat.com>2013-12-09 21:46:48 +0100
commit3ffeeef735fdb52ffee2eed4fb398f3a1199728f (patch)
treec3f5b340b9cc8cd68740a6b8c18024c0a65056b5
parent06a1307379fcd6c551185ad87679cd7ed896b9ea (diff)
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>
-rw-r--r--hw/block/dataplane/virtio-blk.c30
-rw-r--r--hw/block/dataplane/virtio-blk.h5
-rw-r--r--hw/block/virtio-blk.c15
3 files changed, 32 insertions, 18 deletions
diff --git a/hw/block/dataplane/virtio-blk.c b/hw/block/dataplane/virtio-blk.c
index f2d7350a50..1e57f3aabd 100644
--- a/hw/block/dataplane/virtio-blk.c
+++ b/hw/block/dataplane/virtio-blk.c
@@ -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)
diff --git a/hw/block/dataplane/virtio-blk.h b/hw/block/dataplane/virtio-blk.h
index c90e99f48f..1750c9905b 100644
--- a/hw/block/dataplane/virtio-blk.h
+++ b/hw/block/dataplane/virtio-blk.h
@@ -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);
diff --git a/hw/block/virtio-blk.c b/hw/block/virtio-blk.c
index 7f0440f3a8..7552ce357a 100644
--- a/hw/block/virtio-blk.c
+++ b/hw/block/virtio-blk.c
@@ -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;
}