X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fxfrm%2Fxfrm_state.c;h=5dcc10b93c861df1e675589947137bf0006d392e;hb=78c6146f16d45f52c33ddb6b48c10fc6cfc53659;hp=7ba65e82941c4f7794f6ada15a418d60606dbba4;hpb=4f4ae0d42680889c62db4e1f3e6b4aa7787a7257;p=linux-2.6

diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index 7ba65e8294..5dcc10b93c 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -50,6 +50,7 @@ static DEFINE_SPINLOCK(xfrm_state_lock);
  * Main use is finding SA after policy selected tunnel or transport mode.
  * Also, it can be used by ah/esp icmp error handler to find offending SA.
  */
+static LIST_HEAD(xfrm_state_all);
 static struct hlist_head *xfrm_state_bydst __read_mostly;
 static struct hlist_head *xfrm_state_bysrc __read_mostly;
 static struct hlist_head *xfrm_state_byspi __read_mostly;
@@ -388,6 +389,8 @@ static void xfrm_state_gc_destroy(struct xfrm_state *x)
 	kfree(x->coaddr);
 	if (x->inner_mode)
 		xfrm_put_mode(x->inner_mode);
+	if (x->inner_mode_iaf)
+		xfrm_put_mode(x->inner_mode_iaf);
 	if (x->outer_mode)
 		xfrm_put_mode(x->outer_mode);
 	if (x->type) {
@@ -510,6 +513,7 @@ struct xfrm_state *xfrm_state_alloc(void)
 	if (x) {
 		atomic_set(&x->refcnt, 1);
 		atomic_set(&x->tunnel_users, 0);
+		INIT_LIST_HEAD(&x->all);
 		INIT_HLIST_NODE(&x->bydst);
 		INIT_HLIST_NODE(&x->bysrc);
 		INIT_HLIST_NODE(&x->byspi);
@@ -523,6 +527,8 @@ struct xfrm_state *xfrm_state_alloc(void)
 		x->lft.hard_packet_limit = XFRM_INF;
 		x->replay_maxage = 0;
 		x->replay_maxdiff = 0;
+		x->inner_mode = NULL;
+		x->inner_mode_iaf = NULL;
 		spin_lock_init(&x->lock);
 	}
 	return x;
@@ -533,6 +539,10 @@ void __xfrm_state_destroy(struct xfrm_state *x)
 {
 	BUG_TRAP(x->km.state == XFRM_STATE_DEAD);
 
+	spin_lock_bh(&xfrm_state_lock);
+	list_del(&x->all);
+	spin_unlock_bh(&xfrm_state_lock);
+
 	spin_lock_bh(&xfrm_state_gc_lock);
 	hlist_add_head(&x->bydst, &xfrm_state_gc_list);
 	spin_unlock_bh(&xfrm_state_gc_lock);
@@ -796,7 +806,7 @@ 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, x->sel.family) ||
+				if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) ||
 				    !security_xfrm_state_pol_flow_match(x, pol, fl))
 					continue;
 				if (!best ||
@@ -909,6 +919,8 @@ static void __xfrm_state_insert(struct xfrm_state *x)
 
 	x->genid = ++xfrm_state_genid;
 
+	list_add_tail(&x->all, &xfrm_state_all);
+
 	h = xfrm_dst_hash(&x->id.daddr, &x->props.saddr,
 			  x->props.reqid, x->props.family);
 	hlist_add_head(&x->bydst, xfrm_state_bydst+h);
@@ -1518,36 +1530,47 @@ unlock:
 }
 EXPORT_SYMBOL(xfrm_alloc_spi);
 
-int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*),
+int xfrm_state_walk(struct xfrm_state_walk *walk,
+		    int (*func)(struct xfrm_state *, int, void*),
 		    void *data)
 {
-	int i;
-	struct xfrm_state *x, *last = NULL;
-	struct hlist_node *entry;
-	int count = 0;
+	struct xfrm_state *old, *x, *last = NULL;
 	int err = 0;
 
+	if (walk->state == NULL && walk->count != 0)
+		return 0;
+
+	old = x = walk->state;
+	walk->state = NULL;
 	spin_lock_bh(&xfrm_state_lock);
-	for (i = 0; i <= xfrm_state_hmask; i++) {
-		hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
-			if (!xfrm_id_proto_match(x->id.proto, proto))
-				continue;
-			if (last) {
-				err = func(last, count, data);
-				if (err)
-					goto out;
+	if (x == NULL)
+		x = list_first_entry(&xfrm_state_all, struct xfrm_state, all);
+	list_for_each_entry_from(x, &xfrm_state_all, all) {
+		if (x->km.state == XFRM_STATE_DEAD)
+			continue;
+		if (!xfrm_id_proto_match(x->id.proto, walk->proto))
+			continue;
+		if (last) {
+			err = func(last, walk->count, data);
+			if (err) {
+				xfrm_state_hold(last);
+				walk->state = last;
+				goto out;
 			}
-			last = x;
-			count++;
 		}
+		last = x;
+		walk->count++;
 	}
-	if (count == 0) {
+	if (walk->count == 0) {
 		err = -ENOENT;
 		goto out;
 	}
-	err = func(last, 0, data);
+	if (last)
+		err = func(last, 0, data);
 out:
 	spin_unlock_bh(&xfrm_state_lock);
+	if (old != NULL)
+		xfrm_state_put(old);
 	return err;
 }
 EXPORT_SYMBOL(xfrm_state_walk);
@@ -1944,6 +1967,7 @@ int xfrm_state_mtu(struct xfrm_state *x, int mtu)
 int xfrm_init_state(struct xfrm_state *x)
 {
 	struct xfrm_state_afinfo *afinfo;
+	struct xfrm_mode *inner_mode;
 	int family = x->props.family;
 	int err;
 
@@ -1962,13 +1986,48 @@ int xfrm_init_state(struct xfrm_state *x)
 		goto error;
 
 	err = -EPROTONOSUPPORT;
-	x->inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
-	if (x->inner_mode == NULL)
-		goto error;
 
-	if (!(x->inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
-	    family != x->sel.family)
-		goto error;
+	if (x->sel.family != AF_UNSPEC) {
+		inner_mode = xfrm_get_mode(x->props.mode, x->sel.family);
+		if (inner_mode == NULL)
+			goto error;
+
+		if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) &&
+		    family != x->sel.family) {
+			xfrm_put_mode(inner_mode);
+			goto error;
+		}
+
+		x->inner_mode = inner_mode;
+	} else {
+		struct xfrm_mode *inner_mode_iaf;
+
+		inner_mode = xfrm_get_mode(x->props.mode, AF_INET);
+		if (inner_mode == NULL)
+			goto error;
+
+		if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) {
+			xfrm_put_mode(inner_mode);
+			goto error;
+		}
+
+		inner_mode_iaf = xfrm_get_mode(x->props.mode, AF_INET6);
+		if (inner_mode_iaf == NULL)
+			goto error;
+
+		if (!(inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL)) {
+			xfrm_put_mode(inner_mode_iaf);
+			goto error;
+		}
+
+		if (x->props.family == AF_INET) {
+			x->inner_mode = inner_mode;
+			x->inner_mode_iaf = inner_mode_iaf;
+		} else {
+			x->inner_mode = inner_mode_iaf;
+			x->inner_mode_iaf = inner_mode;
+		}
+	}
 
 	x->type = xfrm_get_type(x->id.proto, family);
 	if (x->type == NULL)