Signed-off-by: Asias He <as...@redhat.com>
---
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
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