diff options
| author | Ming Lei <ming.lei@canonical.com> | 2014-06-19 16:12:00 +0800 |
|---|---|---|
| committer | Michael Roth <mdroth@linux.vnet.ibm.com> | 2014-08-05 13:58:37 -0500 |
| commit | aa69eda237ccac63c355d8520ea11175900ace78 (patch) | |
| tree | 61d9317af45736229c31ad8fae04dc9c8a161918 | |
| parent | 8dedaf0f7037baa6c5b0b06a6eccfb120dcead44 (diff) | |
| download | qemu-aa69eda237ccac63c355d8520ea11175900ace78.tar.gz | |
virtio-scsi: define dummy handle_output for vhost-scsi vqs
vhost userspace needn't to handle vq's notification from guest,
so define dummy handle_output callback for all vqs of vhost-scsi.
In some corner cases(such as when handling vq's reset from VM), virtio-pci
still trys to handle pending virtio-scsi events, then object check failure
inside virtio_scsi_handle_event() for vhost-scsi can be triggered.
The issue can be reproduced by 'rmmod virtio-scsi', 'system sleep' or reboot
inside VM.
Cc: qemu-stable@nongnu.org
Cc: Anthony Liguori <aliguori@amazon.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ming Lei <ming.lei@canonical.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 91d670fbf9945ca4ecbd123affb36889e7fe8a5d)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
| -rw-r--r-- | hw/scsi/vhost-scsi.c | 8 | ||||
| -rw-r--r-- | hw/scsi/virtio-scsi.c | 14 | ||||
| -rw-r--r-- | include/hw/virtio/virtio-scsi.h | 7 |
3 files changed, 22 insertions, 7 deletions
diff --git a/hw/scsi/vhost-scsi.c b/hw/scsi/vhost-scsi.c index 3983a5b464..9099192356 100644 --- a/hw/scsi/vhost-scsi.c +++ b/hw/scsi/vhost-scsi.c @@ -196,6 +196,10 @@ static void vhost_scsi_set_status(VirtIODevice *vdev, uint8_t val) } } +static void vhost_dummy_handle_output(VirtIODevice *vdev, VirtQueue *vq) +{ +} + static void vhost_scsi_realize(DeviceState *dev, Error **errp) { VirtIOSCSICommon *vs = VIRTIO_SCSI_COMMON(dev); @@ -217,7 +221,9 @@ static void vhost_scsi_realize(DeviceState *dev, Error **errp) } } - virtio_scsi_common_realize(dev, &err); + virtio_scsi_common_realize(dev, &err, vhost_dummy_handle_output, + vhost_dummy_handle_output, + vhost_dummy_handle_output); if (err != NULL) { error_propagate(errp, err); return; diff --git a/hw/scsi/virtio-scsi.c b/hw/scsi/virtio-scsi.c index 14261fb1a7..d183cd04cf 100644 --- a/hw/scsi/virtio-scsi.c +++ b/hw/scsi/virtio-scsi.c @@ -605,7 +605,9 @@ static struct SCSIBusInfo virtio_scsi_scsi_info = { .load_request = virtio_scsi_load_request, }; -void virtio_scsi_common_realize(DeviceState *dev, Error **errp) +void virtio_scsi_common_realize(DeviceState *dev, Error **errp, + HandleOutput ctrl, HandleOutput evt, + HandleOutput cmd) { VirtIODevice *vdev = VIRTIO_DEVICE(dev); VirtIOSCSICommon *s = VIRTIO_SCSI_COMMON(dev); @@ -619,12 +621,12 @@ void virtio_scsi_common_realize(DeviceState *dev, Error **errp) s->cdb_size = VIRTIO_SCSI_CDB_SIZE; s->ctrl_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, - virtio_scsi_handle_ctrl); + ctrl); s->event_vq = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, - virtio_scsi_handle_event); + evt); for (i = 0; i < s->conf.num_queues; i++) { s->cmd_vqs[i] = virtio_add_queue(vdev, VIRTIO_SCSI_VQ_SIZE, - virtio_scsi_handle_cmd); + cmd); } } @@ -635,7 +637,9 @@ static void virtio_scsi_device_realize(DeviceState *dev, Error **errp) static int virtio_scsi_id; Error *err = NULL; - virtio_scsi_common_realize(dev, &err); + virtio_scsi_common_realize(dev, &err, virtio_scsi_handle_ctrl, + virtio_scsi_handle_event, + virtio_scsi_handle_cmd); if (err != NULL) { error_propagate(errp, err); return; diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h index 42b102487a..e81a643074 100644 --- a/include/hw/virtio/virtio-scsi.h +++ b/include/hw/virtio/virtio-scsi.h @@ -186,7 +186,12 @@ typedef struct { DEFINE_PROP_BIT("param_change", _state, _feature_field, \ VIRTIO_SCSI_F_CHANGE, true) -void virtio_scsi_common_realize(DeviceState *dev, Error **errp); +typedef void (*HandleOutput)(VirtIODevice *, VirtQueue *); + +void virtio_scsi_common_realize(DeviceState *dev, Error **errp, + HandleOutput ctrl, HandleOutput evt, + HandleOutput cmd); + void virtio_scsi_common_unrealize(DeviceState *dev, Error **errp); #endif /* _QEMU_VIRTIO_SCSI_H */ |