xfrm: Make xfrm_state timer monotonic

Fan Du · klassert · commit 99565a6c471c · 2013-08-16T06:53:28.000+02:00
xfrm_state timer should be independent of system clock change, so switch to CLOCK_BOOTTIME base which is not only monotonic but also counting suspend time. Thus issue reported in commit: 9e0d57f ("xfrm: SAD entries do not expire correctly after suspend-resume") could ALSO be avoided. v2: Use CLOCK_BOOTTIME to count suspend time, but still monotonic. Signed-off-by: Fan Du <fan.du@windriver.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
@@ -499,7 +499,8 @@ struct xfrm_state *xfrm_state_alloc(struct net *net)
 		INIT_HLIST_NODE(&x->bydst);
 		INIT_HLIST_NODE(&x->bysrc);
 		INIT_HLIST_NODE(&x->byspi);
-		tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS);
+		tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler,
+					CLOCK_BOOTTIME, HRTIMER_MODE_ABS);
 		setup_timer(&x->rtimer, xfrm_replay_timer_handler,
 				(unsigned long)x);
 		x->curlft.add_time = get_seconds();
