X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fxfrm%2Fxfrm_state.c;h=93a2f36ad3db7b30a681f726e31c6240d030d6ed;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=dc70df79f9cb45340776c4687a500d8870205cb1;hpb=5273a3df6485dc2ad6aa7ddd441b9a21970f003b;p=linux-2.6.git

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index dc70df79f..93a2f36ad 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -10,15 +10,25 @@
  * 		Split up af-specific functions
  *	Derek Atkins <derek@ihtfp.com>
  *		Add UDP Encapsulation
- * 	
+ *
  */
 
 #include <linux/workqueue.h>
 #include <net/xfrm.h>
 #include <linux/pfkeyv2.h>
 #include <linux/ipsec.h>
+#include <linux/module.h>
 #include <asm/uaccess.h>
 
+struct sock *xfrm_nl;
+EXPORT_SYMBOL(xfrm_nl);
+
+u32 sysctl_xfrm_aevent_etime = XFRM_AE_ETIME;
+EXPORT_SYMBOL(sysctl_xfrm_aevent_etime);
+
+u32 sysctl_xfrm_aevent_rseqth = XFRM_AE_SEQT_SIZE;
+EXPORT_SYMBOL(sysctl_xfrm_aevent_rseqth);
+
 /* Each xfrm_state may be linked to two tables:
 
    1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl)
@@ -26,7 +36,7 @@
       destination/tunnel endpoint. (output)
  */
 
-static spinlock_t xfrm_state_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(xfrm_state_lock);
 
 /* Hash table to find appropriate SA towards given target (endpoint
  * of tunnel or destination of transport mode) allowed by selector.
@@ -38,34 +48,41 @@ static struct list_head xfrm_state_bydst[XFRM_DST_HSIZE];
 static struct list_head xfrm_state_byspi[XFRM_DST_HSIZE];
 
 DECLARE_WAIT_QUEUE_HEAD(km_waitq);
+EXPORT_SYMBOL(km_waitq);
 
-static rwlock_t xfrm_state_afinfo_lock = RW_LOCK_UNLOCKED;
+static DEFINE_RWLOCK(xfrm_state_afinfo_lock);
 static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO];
 
 static struct work_struct xfrm_state_gc_work;
 static struct list_head xfrm_state_gc_list = LIST_HEAD_INIT(xfrm_state_gc_list);
-static spinlock_t xfrm_state_gc_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(xfrm_state_gc_lock);
+
+static int xfrm_state_gc_flush_bundles;
+
+int __xfrm_state_delete(struct xfrm_state *x);
 
-static void __xfrm_state_delete(struct xfrm_state *x);
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family);
+static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo);
+
+int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol);
+void km_state_expired(struct xfrm_state *x, int hard, u32 pid);
 
 static void xfrm_state_gc_destroy(struct xfrm_state *x)
 {
 	if (del_timer(&x->timer))
 		BUG();
-	if (x->aalg)
-		kfree(x->aalg);
-	if (x->ealg)
-		kfree(x->ealg);
-	if (x->calg)
-		kfree(x->calg);
-	if (x->encap)
-		kfree(x->encap);
+	if (del_timer(&x->rtimer))
+		BUG();
+	kfree(x->aalg);
+	kfree(x->ealg);
+	kfree(x->calg);
+	kfree(x->encap);
 	if (x->type) {
 		x->type->destructor(x);
 		xfrm_put_type(x->type);
 	}
+	security_xfrm_state_free(x);
 	kfree(x);
-	wake_up(&km_waitq);
 }
 
 static void xfrm_state_gc_task(void *data)
@@ -74,6 +91,11 @@ static void xfrm_state_gc_task(void *data)
 	struct list_head *entry, *tmp;
 	struct list_head gc_list = LIST_HEAD_INIT(gc_list);
 
+	if (xfrm_state_gc_flush_bundles) {
+		xfrm_state_gc_flush_bundles = 0;
+		xfrm_flush_bundles();
+	}
+
 	spin_lock_bh(&xfrm_state_gc_lock);
 	list_splice_init(&xfrm_state_gc_list, &gc_list);
 	spin_unlock_bh(&xfrm_state_gc_lock);
@@ -82,6 +104,7 @@ static void xfrm_state_gc_task(void *data)
 		x = list_entry(entry, struct xfrm_state, bydst);
 		xfrm_state_gc_destroy(x);
 	}
+	wake_up(&km_waitq);
 }
 
 static inline unsigned long make_jiffies(long secs)
@@ -139,8 +162,9 @@ static void xfrm_timer_handler(unsigned long data)
 			next = tmo;
 	}
 
+	x->km.dying = warn;
 	if (warn)
-		km_state_expired(x, 0);
+		km_state_expired(x, 0, 0);
 resched:
 	if (next != LONG_MAX &&
 	    !mod_timer(&x->timer, jiffies + make_jiffies(next)))
@@ -154,15 +178,16 @@ expired:
 		next = 2;
 		goto resched;
 	}
-	if (x->id.spi != 0)
-		km_state_expired(x, 1);
-	__xfrm_state_delete(x);
+	if (!__xfrm_state_delete(x) && x->id.spi)
+		km_state_expired(x, 1, 0);
 
 out:
 	spin_unlock(&x->lock);
 	xfrm_state_put(x);
 }
 
+static void xfrm_replay_timer_handler(unsigned long data);
+
 struct xfrm_state *xfrm_state_alloc(void)
 {
 	struct xfrm_state *x;
@@ -178,15 +203,21 @@ struct xfrm_state *xfrm_state_alloc(void)
 		init_timer(&x->timer);
 		x->timer.function = xfrm_timer_handler;
 		x->timer.data	  = (unsigned long)x;
+		init_timer(&x->rtimer);
+		x->rtimer.function = xfrm_replay_timer_handler;
+		x->rtimer.data     = (unsigned long)x;
 		x->curlft.add_time = (unsigned long)xtime.tv_sec;
 		x->lft.soft_byte_limit = XFRM_INF;
 		x->lft.soft_packet_limit = XFRM_INF;
 		x->lft.hard_byte_limit = XFRM_INF;
 		x->lft.hard_packet_limit = XFRM_INF;
-		x->lock = SPIN_LOCK_UNLOCKED;
+		x->replay_maxage = 0;
+		x->replay_maxdiff = 0;
+		spin_lock_init(&x->lock);
 	}
 	return x;
 }
+EXPORT_SYMBOL(xfrm_state_alloc);
 
 void __xfrm_state_destroy(struct xfrm_state *x)
 {
@@ -197,49 +228,60 @@ void __xfrm_state_destroy(struct xfrm_state *x)
 	spin_unlock_bh(&xfrm_state_gc_lock);
 	schedule_work(&xfrm_state_gc_work);
 }
+EXPORT_SYMBOL(__xfrm_state_destroy);
 
-static void __xfrm_state_delete(struct xfrm_state *x)
+int __xfrm_state_delete(struct xfrm_state *x)
 {
+	int err = -ESRCH;
+
 	if (x->km.state != XFRM_STATE_DEAD) {
 		x->km.state = XFRM_STATE_DEAD;
 		spin_lock(&xfrm_state_lock);
 		list_del(&x->bydst);
-		atomic_dec(&x->refcnt);
+		__xfrm_state_put(x);
 		if (x->id.spi) {
 			list_del(&x->byspi);
-			atomic_dec(&x->refcnt);
+			__xfrm_state_put(x);
 		}
 		spin_unlock(&xfrm_state_lock);
 		if (del_timer(&x->timer))
-			atomic_dec(&x->refcnt);
+			__xfrm_state_put(x);
+		if (del_timer(&x->rtimer))
+			__xfrm_state_put(x);
 
 		/* The number two in this test is the reference
 		 * mentioned in the comment below plus the reference
 		 * our caller holds.  A larger value means that
 		 * there are DSTs attached to this xfrm_state.
 		 */
-		if (atomic_read(&x->refcnt) > 2)
-			xfrm_flush_bundles();
-
-		/* All xfrm_state objects are created by one of two possible
-		 * paths:
-		 *
-		 * 2) xfrm_state_lookup --> xfrm_state_insert
-		 *
-		 * The xfrm_state_lookup or xfrm_state_alloc call gives a
-		 * reference, and that is what we are dropping here.
+		if (atomic_read(&x->refcnt) > 2) {
+			xfrm_state_gc_flush_bundles = 1;
+			schedule_work(&xfrm_state_gc_work);
+		}
+
+		/* All xfrm_state objects are created by xfrm_state_alloc.
+		 * The xfrm_state_alloc call gives a reference, and that
+		 * is what we are dropping here.
 		 */
-		atomic_dec(&x->refcnt);
+		__xfrm_state_put(x);
+		err = 0;
 	}
+
+	return err;
 }
+EXPORT_SYMBOL(__xfrm_state_delete);
 
-void xfrm_state_delete(struct xfrm_state *x)
+int xfrm_state_delete(struct xfrm_state *x)
 {
-	xfrm_state_delete_tunnel(x);
+	int err;
+
 	spin_lock_bh(&x->lock);
-	__xfrm_state_delete(x);
+	err = __xfrm_state_delete(x);
 	spin_unlock_bh(&x->lock);
+
+	return err;
 }
+EXPORT_SYMBOL(xfrm_state_delete);
 
 void xfrm_state_flush(u8 proto)
 {
@@ -266,6 +308,7 @@ restart:
 	spin_unlock_bh(&xfrm_state_lock);
 	wake_up(&km_waitq);
 }
+EXPORT_SYMBOL(xfrm_state_flush);
 
 static int
 xfrm_init_tempsel(struct xfrm_state *x, struct flowi *fl,
@@ -288,10 +331,17 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 		unsigned short family)
 {
 	unsigned h = xfrm_dst_hash(daddr, family);
-	struct xfrm_state *x;
+	struct xfrm_state *x, *x0;
 	int acquire_in_progress = 0;
 	int error = 0;
 	struct xfrm_state *best = NULL;
+	struct xfrm_state_afinfo *afinfo;
+	
+	afinfo = xfrm_state_get_afinfo(family);
+	if (afinfo == NULL) {
+		*err = -EAFNOSUPPORT;
+		return NULL;
+	}
 
 	spin_lock_bh(&xfrm_state_lock);
 	list_for_each_entry(x, xfrm_state_bydst+h, bydst) {
@@ -299,7 +349,8 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 		    x->props.reqid == tmpl->reqid &&
 		    xfrm_state_addr_check(x, daddr, saddr, family) &&
 		    tmpl->mode == x->props.mode &&
-		    tmpl->id.proto == x->id.proto) {
+		    tmpl->id.proto == x->id.proto &&
+		    (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) {
 			/* Resolution logic:
 			   1. There is a valid state with matching selector.
 			      Done.
@@ -314,7 +365,8 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 			      selector.
 			 */
 			if (x->km.state == XFRM_STATE_VALID) {
-				if (!xfrm_selector_match(&x->sel, fl, family))
+				if (!xfrm_selector_match(&x->sel, fl, family) ||
+				    !xfrm_sec_ctx_match(pol->security, x->security))
 					continue;
 				if (!best ||
 				    best->km.dying > x->km.dying ||
@@ -325,21 +377,27 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 				acquire_in_progress = 1;
 			} else if (x->km.state == XFRM_STATE_ERROR ||
 				   x->km.state == XFRM_STATE_EXPIRED) {
-				if (xfrm_selector_match(&x->sel, fl, family))
-					error = 1;
+ 				if (xfrm_selector_match(&x->sel, fl, family) &&
+				    xfrm_sec_ctx_match(pol->security, x->security))
+					error = -ESRCH;
 			}
 		}
 	}
 
-	if (best) {
-		xfrm_state_hold(best);
-		spin_unlock_bh(&xfrm_state_lock);
-		return best;
-	}
-
-	x = NULL;
-	if (!error && !acquire_in_progress &&
-	    ((x = xfrm_state_alloc()) != NULL)) {
+	x = best;
+	if (!x && !error && !acquire_in_progress) {
+		if (tmpl->id.spi &&
+		    (x0 = afinfo->state_lookup(daddr, tmpl->id.spi,
+		                               tmpl->id.proto)) != NULL) {
+			xfrm_state_put(x0);
+			error = -EEXIST;
+			goto out;
+		}
+		x = xfrm_state_alloc();
+		if (x == NULL) {
+			error = -ENOMEM;
+			goto out;
+		}
 		/* Initialize temporary selector matching only
 		 * to current session. */
 		xfrm_init_tempsel(x, fl, tmpl, daddr, saddr, family);
@@ -355,18 +413,22 @@ xfrm_state_find(xfrm_address_t *daddr, xfrm_address_t *saddr,
 			}
 			x->lft.hard_add_expires_seconds = XFRM_ACQ_EXPIRES;
 			xfrm_state_hold(x);
-			mod_timer(&x->timer, XFRM_ACQ_EXPIRES*HZ);
+			x->timer.expires = jiffies + XFRM_ACQ_EXPIRES*HZ;
+			add_timer(&x->timer);
 		} else {
 			x->km.state = XFRM_STATE_DEAD;
 			xfrm_state_put(x);
 			x = NULL;
-			error = 1;
+			error = -ESRCH;
 		}
 	}
+out:
+	if (x)
+		xfrm_state_hold(x);
+	else
+		*err = acquire_in_progress ? -EAGAIN : error;
 	spin_unlock_bh(&xfrm_state_lock);
-	if (!x)
-		*err = acquire_in_progress ? -EAGAIN :
-			(error ? -ESRCH : -ENOMEM);
+	xfrm_state_put_afinfo(afinfo);
 	return x;
 }
 
@@ -385,6 +447,10 @@ static void __xfrm_state_insert(struct xfrm_state *x)
 	if (!mod_timer(&x->timer, jiffies + HZ))
 		xfrm_state_hold(x);
 
+	if (x->replay_maxage &&
+	    !mod_timer(&x->rtimer, jiffies + x->replay_maxage))
+		xfrm_state_hold(x);
+
 	wake_up(&km_waitq);
 }
 
@@ -393,38 +459,48 @@ void xfrm_state_insert(struct xfrm_state *x)
 	spin_lock_bh(&xfrm_state_lock);
 	__xfrm_state_insert(x);
 	spin_unlock_bh(&xfrm_state_lock);
+
+	xfrm_flush_all_bundles();
 }
+EXPORT_SYMBOL(xfrm_state_insert);
+
+static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq);
 
 int xfrm_state_add(struct xfrm_state *x)
 {
 	struct xfrm_state_afinfo *afinfo;
 	struct xfrm_state *x1;
+	int family;
 	int err;
 
-	afinfo = xfrm_state_get_afinfo(x->props.family);
+	family = x->props.family;
+	afinfo = xfrm_state_get_afinfo(family);
 	if (unlikely(afinfo == NULL))
 		return -EAFNOSUPPORT;
 
 	spin_lock_bh(&xfrm_state_lock);
 
 	x1 = afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
-	if (!x1) {
-		x1 = afinfo->find_acq(
-			x->props.mode, x->props.reqid, x->id.proto,
-			&x->id.daddr, &x->props.saddr, 0);
-		if (x1 && x1->id.spi != x->id.spi && x1->id.spi) {
-			xfrm_state_put(x1);
-			x1 = NULL;
-		}
-	}
-
-	if (x1 && x1->id.spi) {
+	if (x1) {
 		xfrm_state_put(x1);
 		x1 = NULL;
 		err = -EEXIST;
 		goto out;
 	}
 
+	if (x->km.seq) {
+		x1 = __xfrm_find_acq_byseq(x->km.seq);
+		if (x1 && xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family)) {
+			xfrm_state_put(x1);
+			x1 = NULL;
+		}
+	}
+
+	if (!x1)
+		x1 = afinfo->find_acq(
+			x->props.mode, x->props.reqid, x->id.proto,
+			&x->id.daddr, &x->props.saddr, 0);
+
 	__xfrm_state_insert(x);
 	err = 0;
 
@@ -432,6 +508,9 @@ out:
 	spin_unlock_bh(&xfrm_state_lock);
 	xfrm_state_put_afinfo(afinfo);
 
+	if (!err)
+		xfrm_flush_all_bundles();
+
 	if (x1) {
 		xfrm_state_delete(x1);
 		xfrm_state_put(x1);
@@ -439,6 +518,7 @@ out:
 
 	return err;
 }
+EXPORT_SYMBOL(xfrm_state_add);
 
 int xfrm_state_update(struct xfrm_state *x)
 {
@@ -489,19 +569,21 @@ out:
 			memcpy(x1->encap, x->encap, sizeof(*x1->encap));
 		memcpy(&x1->lft, &x->lft, sizeof(x1->lft));
 		x1->km.dying = 0;
+
+		if (!mod_timer(&x1->timer, jiffies + HZ))
+			xfrm_state_hold(x1);
+		if (x1->curlft.use_time)
+			xfrm_state_check_expire(x1);
+
 		err = 0;
 	}
 	spin_unlock_bh(&x1->lock);
 
-	if (!mod_timer(&x1->timer, jiffies + HZ))
-		xfrm_state_hold(x1);
-	if (x1->curlft.use_time)
-		xfrm_state_check_expire(x1);
-
 	xfrm_state_put(x1);
 
 	return err;
 }
+EXPORT_SYMBOL(xfrm_state_update);
 
 int xfrm_state_check_expire(struct xfrm_state *x)
 {
@@ -513,20 +595,23 @@ int xfrm_state_check_expire(struct xfrm_state *x)
 
 	if (x->curlft.bytes >= x->lft.hard_byte_limit ||
 	    x->curlft.packets >= x->lft.hard_packet_limit) {
-		km_state_expired(x, 1);
-		if (!mod_timer(&x->timer, jiffies + XFRM_ACQ_EXPIRES*HZ))
+		x->km.state = XFRM_STATE_EXPIRED;
+		if (!mod_timer(&x->timer, jiffies))
 			xfrm_state_hold(x);
 		return -EINVAL;
 	}
 
 	if (!x->km.dying &&
 	    (x->curlft.bytes >= x->lft.soft_byte_limit ||
-	     x->curlft.packets >= x->lft.soft_packet_limit))
-		km_state_expired(x, 0);
+	     x->curlft.packets >= x->lft.soft_packet_limit)) {
+		x->km.dying = 1;
+		km_state_expired(x, 0, 0);
+	}
 	return 0;
 }
+EXPORT_SYMBOL(xfrm_state_check_expire);
 
-int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb)
+static int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb)
 {
 	int nhead = x->props.header_len + LL_RESERVED_SPACE(skb->dst->dev)
 		- skb_headroom(skb);
@@ -538,6 +623,17 @@ int xfrm_state_check_space(struct xfrm_state *x, struct sk_buff *skb)
 	return 0;
 }
 
+int xfrm_state_check(struct xfrm_state *x, struct sk_buff *skb)
+{
+	int err = xfrm_state_check_expire(x);
+	if (err < 0)
+		goto err;
+	err = xfrm_state_check_space(x, skb);
+err:
+	return err;
+}
+EXPORT_SYMBOL(xfrm_state_check);
+
 struct xfrm_state *
 xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto,
 		  unsigned short family)
@@ -553,6 +649,7 @@ xfrm_state_lookup(xfrm_address_t *daddr, u32 spi, u8 proto,
 	xfrm_state_put_afinfo(afinfo);
 	return x;
 }
+EXPORT_SYMBOL(xfrm_state_lookup);
 
 struct xfrm_state *
 xfrm_find_acq(u8 mode, u32 reqid, u8 proto, 
@@ -570,39 +667,49 @@ xfrm_find_acq(u8 mode, u32 reqid, u8 proto,
 	xfrm_state_put_afinfo(afinfo);
 	return x;
 }
+EXPORT_SYMBOL(xfrm_find_acq);
 
 /* Silly enough, but I'm lazy to build resolution list */
 
-struct xfrm_state * xfrm_find_acq_byseq(u32 seq)
+static struct xfrm_state *__xfrm_find_acq_byseq(u32 seq)
 {
 	int i;
 	struct xfrm_state *x;
 
-	spin_lock_bh(&xfrm_state_lock);
 	for (i = 0; i < XFRM_DST_HSIZE; i++) {
 		list_for_each_entry(x, xfrm_state_bydst+i, bydst) {
-			if (x->km.seq == seq) {
+			if (x->km.seq == seq && x->km.state == XFRM_STATE_ACQ) {
 				xfrm_state_hold(x);
-				spin_unlock_bh(&xfrm_state_lock);
 				return x;
 			}
 		}
 	}
-	spin_unlock_bh(&xfrm_state_lock);
 	return NULL;
 }
- 
+
+struct xfrm_state *xfrm_find_acq_byseq(u32 seq)
+{
+	struct xfrm_state *x;
+
+	spin_lock_bh(&xfrm_state_lock);
+	x = __xfrm_find_acq_byseq(seq);
+	spin_unlock_bh(&xfrm_state_lock);
+	return x;
+}
+EXPORT_SYMBOL(xfrm_find_acq_byseq);
+
 u32 xfrm_get_acqseq(void)
 {
 	u32 res;
 	static u32 acqseq;
-	static spinlock_t acqseq_lock = SPIN_LOCK_UNLOCKED;
+	static DEFINE_SPINLOCK(acqseq_lock);
 
 	spin_lock_bh(&acqseq_lock);
 	res = (++acqseq ? : ++acqseq);
 	spin_unlock_bh(&acqseq_lock);
 	return res;
 }
+EXPORT_SYMBOL(xfrm_get_acqseq);
 
 void
 xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi)
@@ -627,11 +734,12 @@ xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi)
 		for (h=0; h<maxspi-minspi+1; h++) {
 			spi = minspi + net_random()%(maxspi-minspi+1);
 			x0 = xfrm_state_lookup(&x->id.daddr, htonl(spi), x->id.proto, x->props.family);
-			if (x0 == NULL)
+			if (x0 == NULL) {
+				x->id.spi = htonl(spi);
 				break;
+			}
 			xfrm_state_put(x0);
 		}
-		x->id.spi = htonl(spi);
 	}
 	if (x->id.spi) {
 		spin_lock_bh(&xfrm_state_lock);
@@ -642,6 +750,7 @@ xfrm_alloc_spi(struct xfrm_state *x, u32 minspi, u32 maxspi)
 		wake_up(&km_waitq);
 	}
 }
+EXPORT_SYMBOL(xfrm_alloc_spi);
 
 int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*),
 		    void *data)
@@ -676,7 +785,75 @@ out:
 	spin_unlock_bh(&xfrm_state_lock);
 	return err;
 }
+EXPORT_SYMBOL(xfrm_state_walk);
+
+
+void xfrm_replay_notify(struct xfrm_state *x, int event)
+{
+	struct km_event c;
+	/* we send notify messages in case
+	 *  1. we updated on of the sequence numbers, and the seqno difference
+	 *     is at least x->replay_maxdiff, in this case we also update the
+	 *     timeout of our timer function
+	 *  2. if x->replay_maxage has elapsed since last update,
+	 *     and there were changes
+	 *
+	 *  The state structure must be locked!
+	 */
+
+	switch (event) {
+	case XFRM_REPLAY_UPDATE:
+		if (x->replay_maxdiff &&
+		    (x->replay.seq - x->preplay.seq < x->replay_maxdiff) &&
+		    (x->replay.oseq - x->preplay.oseq < x->replay_maxdiff)) {
+			if (x->xflags & XFRM_TIME_DEFER)
+				event = XFRM_REPLAY_TIMEOUT;
+			else
+				return;
+		}
 
+		break;
+
+	case XFRM_REPLAY_TIMEOUT:
+		if ((x->replay.seq == x->preplay.seq) &&
+		    (x->replay.bitmap == x->preplay.bitmap) &&
+		    (x->replay.oseq == x->preplay.oseq)) {
+			x->xflags |= XFRM_TIME_DEFER;
+			return;
+		}
+
+		break;
+	}
+
+	memcpy(&x->preplay, &x->replay, sizeof(struct xfrm_replay_state));
+	c.event = XFRM_MSG_NEWAE;
+	c.data.aevent = event;
+	km_state_notify(x, &c);
+
+	if (x->replay_maxage &&
+	    !mod_timer(&x->rtimer, jiffies + x->replay_maxage)) {
+		xfrm_state_hold(x);
+		x->xflags &= ~XFRM_TIME_DEFER;
+	}
+}
+EXPORT_SYMBOL(xfrm_replay_notify);
+
+static void xfrm_replay_timer_handler(unsigned long data)
+{
+	struct xfrm_state *x = (struct xfrm_state*)data;
+
+	spin_lock(&x->lock);
+
+	if (x->km.state == XFRM_STATE_VALID) {
+		if (xfrm_aevent_is_on())
+			xfrm_replay_notify(x, XFRM_REPLAY_TIMEOUT);
+		else
+			x->xflags |= XFRM_TIME_DEFER;
+	}
+
+	spin_unlock(&x->lock);
+	xfrm_state_put(x);
+}
 
 int xfrm_replay_check(struct xfrm_state *x, u32 seq)
 {
@@ -702,6 +879,7 @@ int xfrm_replay_check(struct xfrm_state *x, u32 seq)
 	}
 	return 0;
 }
+EXPORT_SYMBOL(xfrm_replay_check);
 
 void xfrm_replay_advance(struct xfrm_state *x, u32 seq)
 {
@@ -720,56 +898,72 @@ void xfrm_replay_advance(struct xfrm_state *x, u32 seq)
 		diff = x->replay.seq - seq;
 		x->replay.bitmap |= (1U << diff);
 	}
-}
 
-int xfrm_check_selectors(struct xfrm_state **x, int n, struct flowi *fl)
-{
-	int i;
-
-	for (i=0; i<n; i++) {
-		int match;
-		match = xfrm_selector_match(&x[i]->sel, fl, x[i]->props.family);
-		if (!match)
-			return -EINVAL;
-	}
-	return 0;
+	if (xfrm_aevent_is_on())
+		xfrm_replay_notify(x, XFRM_REPLAY_UPDATE);
 }
+EXPORT_SYMBOL(xfrm_replay_advance);
 
 static struct list_head xfrm_km_list = LIST_HEAD_INIT(xfrm_km_list);
-static rwlock_t		xfrm_km_lock = RW_LOCK_UNLOCKED;
+static DEFINE_RWLOCK(xfrm_km_lock);
 
-void km_state_expired(struct xfrm_state *x, int hard)
+void km_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c)
 {
 	struct xfrm_mgr *km;
 
-	if (hard)
-		x->km.state = XFRM_STATE_EXPIRED;
-	else
-		x->km.dying = 1;
+	read_lock(&xfrm_km_lock);
+	list_for_each_entry(km, &xfrm_km_list, list)
+		if (km->notify_policy)
+			km->notify_policy(xp, dir, c);
+	read_unlock(&xfrm_km_lock);
+}
 
+void km_state_notify(struct xfrm_state *x, struct km_event *c)
+{
+	struct xfrm_mgr *km;
 	read_lock(&xfrm_km_lock);
 	list_for_each_entry(km, &xfrm_km_list, list)
-		km->notify(x, hard);
+		if (km->notify)
+			km->notify(x, c);
 	read_unlock(&xfrm_km_lock);
+}
+
+EXPORT_SYMBOL(km_policy_notify);
+EXPORT_SYMBOL(km_state_notify);
+
+void km_state_expired(struct xfrm_state *x, int hard, u32 pid)
+{
+	struct km_event c;
+
+	c.data.hard = hard;
+	c.pid = pid;
+	c.event = XFRM_MSG_EXPIRE;
+	km_state_notify(x, &c);
 
 	if (hard)
 		wake_up(&km_waitq);
 }
 
+EXPORT_SYMBOL(km_state_expired);
+/*
+ * We send to all registered managers regardless of failure
+ * We are happy with one success
+*/
 int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol)
 {
-	int err = -EINVAL;
+	int err = -EINVAL, acqret;
 	struct xfrm_mgr *km;
 
 	read_lock(&xfrm_km_lock);
 	list_for_each_entry(km, &xfrm_km_list, list) {
-		err = km->acquire(x, t, pol, XFRM_POLICY_OUT);
-		if (!err)
-			break;
+		acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT);
+		if (!acqret)
+			err = acqret;
 	}
 	read_unlock(&xfrm_km_lock);
 	return err;
 }
+EXPORT_SYMBOL(km_query);
 
 int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
 {
@@ -786,22 +980,23 @@ int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, u16 sport)
 	read_unlock(&xfrm_km_lock);
 	return err;
 }
+EXPORT_SYMBOL(km_new_mapping);
 
-void km_policy_expired(struct xfrm_policy *pol, int dir, int hard)
+void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid)
 {
-	struct xfrm_mgr *km;
+	struct km_event c;
 
-	read_lock(&xfrm_km_lock);
-	list_for_each_entry(km, &xfrm_km_list, list)
-		if (km->notify_policy)
-			km->notify_policy(pol, dir, hard);
-	read_unlock(&xfrm_km_lock);
+	c.data.hard = hard;
+	c.pid = pid;
+	c.event = XFRM_MSG_POLEXPIRE;
+	km_policy_notify(pol, dir, &c);
 
 	if (hard)
 		wake_up(&km_waitq);
 }
+EXPORT_SYMBOL(km_policy_expired);
 
-int xfrm_user_policy(struct sock *sk, int optname, u8 *optval, int optlen)
+int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen)
 {
 	int err;
 	u8 *data;
@@ -839,6 +1034,7 @@ out:
 	kfree(data);
 	return err;
 }
+EXPORT_SYMBOL(xfrm_user_policy);
 
 int xfrm_register_km(struct xfrm_mgr *km)
 {
@@ -847,6 +1043,7 @@ int xfrm_register_km(struct xfrm_mgr *km)
 	write_unlock_bh(&xfrm_km_lock);
 	return 0;
 }
+EXPORT_SYMBOL(xfrm_register_km);
 
 int xfrm_unregister_km(struct xfrm_mgr *km)
 {
@@ -855,6 +1052,7 @@ int xfrm_unregister_km(struct xfrm_mgr *km)
 	write_unlock_bh(&xfrm_km_lock);
 	return 0;
 }
+EXPORT_SYMBOL(xfrm_unregister_km);
 
 int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
 {
@@ -863,7 +1061,7 @@ int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
 		return -EINVAL;
 	if (unlikely(afinfo->family >= NPROTO))
 		return -EAFNOSUPPORT;
-	write_lock(&xfrm_state_afinfo_lock);
+	write_lock_bh(&xfrm_state_afinfo_lock);
 	if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL))
 		err = -ENOBUFS;
 	else {
@@ -871,9 +1069,10 @@ int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo)
 		afinfo->state_byspi = xfrm_state_byspi;
 		xfrm_state_afinfo[afinfo->family] = afinfo;
 	}
-	write_unlock(&xfrm_state_afinfo_lock);
+	write_unlock_bh(&xfrm_state_afinfo_lock);
 	return err;
 }
+EXPORT_SYMBOL(xfrm_state_register_afinfo);
 
 int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
 {
@@ -882,7 +1081,7 @@ int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
 		return -EINVAL;
 	if (unlikely(afinfo->family >= NPROTO))
 		return -EAFNOSUPPORT;
-	write_lock(&xfrm_state_afinfo_lock);
+	write_lock_bh(&xfrm_state_afinfo_lock);
 	if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) {
 		if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo))
 			err = -EINVAL;
@@ -892,11 +1091,12 @@ int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo)
 			afinfo->state_bydst = NULL;
 		}
 	}
-	write_unlock(&xfrm_state_afinfo_lock);
+	write_unlock_bh(&xfrm_state_afinfo_lock);
 	return err;
 }
+EXPORT_SYMBOL(xfrm_state_unregister_afinfo);
 
-struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family)
+static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family)
 {
 	struct xfrm_state_afinfo *afinfo;
 	if (unlikely(family >= NPROTO))
@@ -909,7 +1109,7 @@ struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned short family)
 	return afinfo;
 }
 
-void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
+static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo)
 {
 	if (unlikely(afinfo == NULL))
 		return;
@@ -929,7 +1129,81 @@ void xfrm_state_delete_tunnel(struct xfrm_state *x)
 		x->tunnel = NULL;
 	}
 }
+EXPORT_SYMBOL(xfrm_state_delete_tunnel);
+
+/*
+ * This function is NOT optimal.  For example, with ESP it will give an
+ * MTU that's usually two bytes short of being optimal.  However, it will
+ * usually give an answer that's a multiple of 4 provided the input is
+ * also a multiple of 4.
+ */
+int xfrm_state_mtu(struct xfrm_state *x, int mtu)
+{
+	int res = mtu;
+
+	res -= x->props.header_len;
+
+	for (;;) {
+		int m = res;
+
+		if (m < 68)
+			return 68;
+
+		spin_lock_bh(&x->lock);
+		if (x->km.state == XFRM_STATE_VALID &&
+		    x->type && x->type->get_max_size)
+			m = x->type->get_max_size(x, m);
+		else
+			m += x->props.header_len;
+		spin_unlock_bh(&x->lock);
+
+		if (m <= mtu)
+			break;
+		res -= (m - mtu);
+	}
+
+	return res;
+}
+
+EXPORT_SYMBOL(xfrm_state_mtu);
+
+int xfrm_init_state(struct xfrm_state *x)
+{
+	struct xfrm_state_afinfo *afinfo;
+	int family = x->props.family;
+	int err;
+
+	err = -EAFNOSUPPORT;
+	afinfo = xfrm_state_get_afinfo(family);
+	if (!afinfo)
+		goto error;
+
+	err = 0;
+	if (afinfo->init_flags)
+		err = afinfo->init_flags(x);
+
+	xfrm_state_put_afinfo(afinfo);
+
+	if (err)
+		goto error;
+
+	err = -EPROTONOSUPPORT;
+	x->type = xfrm_get_type(x->id.proto, family);
+	if (x->type == NULL)
+		goto error;
+
+	err = x->type->init_state(x);
+	if (err)
+		goto error;
+
+	x->km.state = XFRM_STATE_VALID;
+
+error:
+	return err;
+}
 
+EXPORT_SYMBOL(xfrm_init_state);
+ 
 void __init xfrm_state_init(void)
 {
 	int i;