Commit 11c63418 authored by Asias He's avatar Asias He Committed by Nicholas Bellinger
Browse files

tcm_vhost: Add ioctl to get and set events missed flag 



Signed-off-by: default avatarAsias He <asias@redhat.com>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarNicholas Bellinger <nab@linux-iscsi.org>
parent a6c9af87

drivers/vhost/tcm_vhost.c

+17 −0
Original line number Diff line number Diff line
@@ -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))

drivers/vhost/tcm_vhost.h

+3 −0
Original line number Diff line number Diff line
@@ -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, __u32)

#define VHOST_SCSI_GET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x44, __u32)