4 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index b53f799189af..1d8c1f22c12d 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -236,6 +236,7 @@ enum xfrm_attr_type_t {
         XFRMA_ETIMER_THRESH,
         XFRMA_SRCADDR,          /* xfrm_address_t */
         XFRMA_COADDR,           /* xfrm_address_t */
+        XFRMA_LASTUSED,
         __XFRMA_MAX
 
 #define XFRMA_MAX (__XFRMA_MAX - 1)
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 872a2a4022b2..248874ecf8df 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -167,6 +167,9 @@ struct xfrm_state
         struct xfrm_lifetime_cur curlft;
         struct timer_list       timer;
 
+        /* Last used time */
+        u64                     lastused;
+
         /* Reference to data common to all the instances of this
          * transformer. */
         struct xfrm_type        *type;
diff --git a/net/ipv6/xfrm6_output.c b/net/ipv6/xfrm6_output.c
index b4628fbf8ff5..db58104e710b 100644
--- a/net/ipv6/xfrm6_output.c
+++ b/net/ipv6/xfrm6_output.c
@@ -75,6 +75,8 @@ static int xfrm6_output_one(struct sk_buff *skb)
 
                 x->curlft.bytes += skb->len;
                 x->curlft.packets++;
+                if (x->props.mode == XFRM_MODE_ROUTEOPTIMIZATION)
+                        x->lastused = (u64)xtime.tv_sec;
 
                 spin_unlock_bh(&x->lock);
 
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 939808de9e20..f643063a1cbd 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -595,6 +595,9 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr)
         if (x->coaddr)
                 RTA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr);
 
+        if (x->lastused)
+                RTA_PUT(skb, XFRMA_LASTUSED, sizeof(x->lastused), &x->lastused);
+
         nlh->nlmsg_len = skb->tail - b;
 out:
         sp->this_idx++;