Signed-off-by: Asias He <as...@redhat.com>
---
drivers/vhost/tcm_vhost.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/drivers/vhost/tcm_vhost.c b/drivers/vhost/tcm_vhost.c
index 88ebb79..8f05528 100644
--- a/drivers/vhost/tcm_vhost.c
+++ b/drivers/vhost/tcm_vhost.c
@@ -111,6 +111,24 @@ static bool tcm_vhost_check_feature(struct vhost_scsi *vs,
int feature)
return ret;
}
+static bool tcm_vhost_check_endpoint(struct vhost_virtqueue *vq)
+{
+ bool ret = false;
+
+ /*
+ * We can handle the vq only after the endpoint is setup by calling the
+ * VHOST_SCSI_SET_ENDPOINT ioctl.
+ *
+ * TODO: Check that we are running from vhost_worker which acts
+ * as read-side critical section for vhost kind of RCU.
+ * See the comments in struct vhost_virtqueue in drivers/vhost/vhost.h
+ */
+ if (rcu_dereference_check(vq->private_data, 1))
+ ret = true;
+
+ return ret;
+}
+
static int tcm_vhost_check_true(struct se_portal_group *se_tpg)
{
return 1;
--
1.8.1.4
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