diff options
Diffstat (limited to 'drivers/vhost/tcm_vhost.c')
| -rw-r--r-- | drivers/vhost/tcm_vhost.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c index 5340fd759c6e..07217d818ad7 100644 --- a/drivers/vhost/tcm_vhost.c +++ b/drivers/vhost/tcm_vhost.c @@ -1200,8 +1200,11 @@ static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl, struct vhost_scsi_target backend; void __user *argp = (void __user *)arg; u64 __user *featurep = argp; + u32 __user *eventsp = argp; + u32 events_missed; u64 features; int r, abi_version = VHOST_SCSI_ABI_VERSION; + struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT]; switch (ioctl) { case VHOST_SCSI_SET_ENDPOINT: @@ -1222,6 +1225,20 @@ static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl, if (copy_to_user(argp, &abi_version, sizeof abi_version)) return -EFAULT; return 0; + case VHOST_SCSI_SET_EVENTS_MISSED: + if (get_user(events_missed, eventsp)) + return -EFAULT; + mutex_lock(&vq->mutex); + vs->vs_events_missed = events_missed; + mutex_unlock(&vq->mutex); + return 0; + case VHOST_SCSI_GET_EVENTS_MISSED: + mutex_lock(&vq->mutex); + events_missed = vs->vs_events_missed; + mutex_unlock(&vq->mutex); + if (put_user(events_missed, eventsp)) + return -EFAULT; + return 0; case VHOST_GET_FEATURES: features = VHOST_SCSI_FEATURES; if (copy_to_user(featurep, &features, sizeof features)) |