Signed-off-by: Asias He <asias@xxxxxxxxxx> --- drivers/vhost/tcm_vhost.c | 16 ++++++++++++++++ drivers/vhost/tcm_vhost.h | 3 +++ 2 files changed, 19 insertions(+) diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c index def0c57..11fca73 100644 --- a/drivers/vhost/tcm_vhost.c +++ b/drivers/vhost/tcm_vhost.c @@ -1204,6 +1204,8 @@ static long vhost_scsi_ioctl(struct file *f, unsigned int ioctl, u64 __user *featurep = argp; u64 features; int r, abi_version = VHOST_SCSI_ABI_VERSION; + struct vhost_virtqueue *vq = &vs->vqs[VHOST_SCSI_VQ_EVT]; + bool events_missed; switch (ioctl) { case VHOST_SCSI_SET_ENDPOINT: @@ -1224,6 +1226,20 @@ 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 (copy_from_user(&events_missed, argp, sizeof(events_missed))) + 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 (copy_to_user(argp, &events_missed, sizeof(events_missed))) + return -EFAULT; + return 0; case VHOST_GET_FEATURES: features = VHOST_SCSI_FEATURES; if (copy_to_user(featurep, &features, sizeof features)) diff --git a/drivers/vhost/tcm_vhost.h b/drivers/vhost/tcm_vhost.h index 94e9ee53..b473e25 100644 --- a/drivers/vhost/tcm_vhost.h +++ b/drivers/vhost/tcm_vhost.h @@ -123,3 +123,6 @@ struct vhost_scsi_target { #define VHOST_SCSI_CLEAR_ENDPOINT _IOW(VHOST_VIRTIO, 0x41, struct vhost_scsi_target) /* Changing this breaks userspace. */ #define VHOST_SCSI_GET_ABI_VERSION _IOW(VHOST_VIRTIO, 0x42, int) +/* Set and get the events missed flag */ +#define VHOST_SCSI_SET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x43, bool) +#define VHOST_SCSI_GET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x44, bool) -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html