From: Fam Zheng <f...@redhat.com>
The previous patch dropped all op blockers from virtio-blk data plane.
The situation of virtio-scsi is exactly the same it can drop them too.
Signed-off-by: Fam Zheng <f...@redhat.com>
Acked-by: Michael S. Tsirkin <m...@redhat.com>
Message-id: 1463969978-24970-5-git-send-email-f...@redhat.com
Signed-off-by: Stefan Hajnoczi <stefa...@redhat.com>
---
hw/scsi/virtio-scsi.c | 62 -----------------------------------------
include/hw/virtio/virtio-scsi.h | 11 --------
2 files changed, 73 deletions(-)
diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c
index 30415c6..d26f490 100644
--- a/hw/scsi/virtio-scsi.c
+++ b/hw/scsi/virtio-scsi.c
@@ -773,22 +773,6 @@ static void virtio_scsi_change(SCSIBus *bus, SCSIDevice
*dev, SCSISense sense)
}
}
-static void virtio_scsi_blk_insert_notifier(Notifier *n, void *data)
-{
- VirtIOSCSIBlkChangeNotifier *cn = DO_UPCAST(VirtIOSCSIBlkChangeNotifier,
- n, n);
- assert(cn->sd->conf.blk == data);
- blk_op_block_all(cn->sd->conf.blk, cn->s->blocker);
-}
-
-static void virtio_scsi_blk_remove_notifier(Notifier *n, void *data)
-{
- VirtIOSCSIBlkChangeNotifier *cn = DO_UPCAST(VirtIOSCSIBlkChangeNotifier,
- n, n);
- assert(cn->sd->conf.blk == data);
- blk_op_unblock_all(cn->sd->conf.blk, cn->s->blocker);
-}
-
static void virtio_scsi_hotplug(HotplugHandler *hotplug_dev, DeviceState *dev,
Error **errp)
{
@@ -797,29 +781,13 @@ static void virtio_scsi_hotplug(HotplugHandler
*hotplug_dev, DeviceState *dev,
SCSIDevice *sd = SCSI_DEVICE(dev);
if (s->ctx && !s->dataplane_fenced) {
- VirtIOSCSIBlkChangeNotifier *insert_notifier, *remove_notifier;
-
if (blk_op_is_blocked(sd->conf.blk, BLOCK_OP_TYPE_DATAPLANE, errp)) {
return;
}
- blk_op_block_all(sd->conf.blk, s->blocker);
aio_context_acquire(s->ctx);
blk_set_aio_context(sd->conf.blk, s->ctx);
aio_context_release(s->ctx);
- insert_notifier = g_new0(VirtIOSCSIBlkChangeNotifier, 1);
- insert_notifier->n.notify = virtio_scsi_blk_insert_notifier;
- insert_notifier->s = s;
- insert_notifier->sd = sd;
- blk_add_insert_bs_notifier(sd->conf.blk, &insert_notifier->n);
- QTAILQ_INSERT_TAIL(&s->insert_notifiers, insert_notifier, next);
-
- remove_notifier = g_new0(VirtIOSCSIBlkChangeNotifier, 1);
- remove_notifier->n.notify = virtio_scsi_blk_remove_notifier;
- remove_notifier->s = s;
- remove_notifier->sd = sd;
- blk_add_remove_bs_notifier(sd->conf.blk, &remove_notifier->n);
- QTAILQ_INSERT_TAIL(&s->remove_notifiers, remove_notifier, next);
}
if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) {
@@ -835,7 +803,6 @@ static void virtio_scsi_hotunplug(HotplugHandler
*hotplug_dev, DeviceState *dev,
VirtIODevice *vdev = VIRTIO_DEVICE(hotplug_dev);
VirtIOSCSI *s = VIRTIO_SCSI(vdev);
SCSIDevice *sd = SCSI_DEVICE(dev);
- VirtIOSCSIBlkChangeNotifier *insert_notifier, *remove_notifier;
if (virtio_vdev_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG)) {
virtio_scsi_push_event(s, sd,
@@ -843,28 +810,6 @@ static void virtio_scsi_hotunplug(HotplugHandler
*hotplug_dev, DeviceState *dev,
VIRTIO_SCSI_EVT_RESET_REMOVED);
}
- if (s->ctx) {
- blk_op_unblock_all(sd->conf.blk, s->blocker);
- }
-
- QTAILQ_FOREACH(insert_notifier, &s->insert_notifiers, next) {
- if (insert_notifier->sd == sd) {
- notifier_remove(&insert_notifier->n);
- QTAILQ_REMOVE(&s->insert_notifiers, insert_notifier, next);
- g_free(insert_notifier);
- break;
- }
- }
-
- QTAILQ_FOREACH(remove_notifier, &s->remove_notifiers, next) {
- if (remove_notifier->sd == sd) {
- notifier_remove(&remove_notifier->n);
- QTAILQ_REMOVE(&s->remove_notifiers, remove_notifier, next);
- g_free(remove_notifier);
- break;
- }
- }
-
qdev_simple_device_unplug_cb(hotplug_dev, dev, errp);
}
@@ -950,11 +895,6 @@ static void virtio_scsi_device_realize(DeviceState *dev,
Error **errp)
register_savevm(dev, "virtio-scsi", virtio_scsi_id++, 1,
virtio_scsi_save, virtio_scsi_load, s);
-
- error_setg(&s->blocker, "block device is in use by data plane");
-
- QTAILQ_INIT(&s->insert_notifiers);
- QTAILQ_INIT(&s->remove_notifiers);
}
static void virtio_scsi_instance_init(Object *obj)
@@ -980,8 +920,6 @@ static void virtio_scsi_device_unrealize(DeviceState *dev,
Error **errp)
{
VirtIOSCSI *s = VIRTIO_SCSI(dev);
- error_free(s->blocker);
-
unregister_savevm(dev, "virtio-scsi", s);
virtio_scsi_common_unrealize(dev, errp);
}
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index ba2f5ce..b515669 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -68,13 +68,6 @@ typedef struct VirtIOSCSICommon {
VirtQueue **cmd_vqs;
} VirtIOSCSICommon;
-typedef struct VirtIOSCSIBlkChangeNotifier {
- Notifier n;
- struct VirtIOSCSI *s;
- SCSIDevice *sd;
- QTAILQ_ENTRY(VirtIOSCSIBlkChangeNotifier) next;
-} VirtIOSCSIBlkChangeNotifier;
-
typedef struct VirtIOSCSI {
VirtIOSCSICommon parent_obj;
@@ -85,14 +78,10 @@ typedef struct VirtIOSCSI {
/* Fields for dataplane below */
AioContext *ctx; /* one iothread per virtio-scsi-pci for now */
- QTAILQ_HEAD(, VirtIOSCSIBlkChangeNotifier) insert_notifiers;
- QTAILQ_HEAD(, VirtIOSCSIBlkChangeNotifier) remove_notifiers;
-
bool dataplane_started;
bool dataplane_starting;
bool dataplane_stopping;
bool dataplane_fenced;
- Error *blocker;
uint32_t host_features;
} VirtIOSCSI;
--
2.5.5
