commit d639996a74fa71a9553bcef7cb2b2e9bb0fd5203
Author: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Date:   Fri Jan 29 12:58:02 2016 +0800

    vhost: enable log_shmfd protocol feature

    To claim that we support vhost-user live migration support:
    SET_LOG_BASE request will be send only when this feature flag
    is set.

    Besides this flag, we actually need another feature flag set
    to make vhost-user live migration work: VHOST_F_LOG_ALL.
    Which, however, has been enabled long time ago.

    Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
    Tested-by: Pavel Fedin <p.fedin@samsung.com>

Index: dpdk-2.2.0/lib/librte_vhost/vhost_user/virtio-net-user.h
===================================================================
--- dpdk-2.2.0.orig/lib/librte_vhost/vhost_user/virtio-net-user.h
+++ dpdk-2.2.0/lib/librte_vhost/vhost_user/virtio-net-user.h
@@ -38,8 +38,10 @@
 #include "vhost-net-user.h"
 
 #define VHOST_USER_PROTOCOL_F_MQ	0
+#define VHOST_USER_PROTOCOL_F_LOG_SHMFD		1
 
-#define VHOST_USER_PROTOCOL_FEATURES	(1ULL << VHOST_USER_PROTOCOL_F_MQ)
+#define VHOST_USER_PROTOCOL_FEATURES   ((1ULL << VHOST_USER_PROTOCOL_F_MQ) | \
+                                        (1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD))
 
 int user_set_mem_table(struct vhost_device_ctx, struct VhostUserMsg *);