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| author | Asias He <asias@redhat.com> | 2013-04-25 15:35:22 +0800 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2013-04-25 01:07:45 -0700 |
| commit | 11c634183961c1f22a44167a676d0610cee3edaa (patch) | |
| tree | 6859bbb05a027e080e16389f9ea2c039021466ad /drivers/vhost | |
| parent | a6c9af87363c5e964d981fe0ec4aa73061a0c793 (diff) | |
| download | linux-stable-11c634183961c1f22a44167a676d0610cee3edaa.tar.gz linux-stable-11c634183961c1f22a44167a676d0610cee3edaa.tar.bz2 linux-stable-11c634183961c1f22a44167a676d0610cee3edaa.zip | |
tcm_vhost: Add ioctl to get and set events missed flag
Signed-off-by: Asias He <asias@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/tcm_vhost.c | 17 | ||||
| -rw-r--r-- | drivers/vhost/tcm_vhost.h | 3 |
2 files changed, 20 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)) diff --git a/drivers/vhost/tcm_vhost.h b/drivers/vhost/tcm_vhost.h index a545a5b766a3..514b9fda230e 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, __u32) +#define VHOST_SCSI_GET_EVENTS_MISSED _IOW(VHOST_VIRTIO, 0x44, __u32) |