X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=net%2Fxfrm%2Fxfrm_policy.c;h=841b32a2e680818aae4b3eb6d8d3d5504acb616c;hb=00e9028a95fb8a4d79f2fb695a853f33ea7d3b57;hp=47219f98053f86217027245dc81b42fbdf4d57e5;hpb=c1f3ee120bb61045b1c0a3ead620d1d65af47130;p=linux-2.6

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 47219f9805..841b32a2e6 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -46,6 +46,7 @@ EXPORT_SYMBOL(xfrm_cfg_mutex);
 
 static DEFINE_RWLOCK(xfrm_policy_lock);
 
+static struct list_head xfrm_policy_bytype[XFRM_POLICY_TYPE_MAX];
 unsigned int xfrm_policy_count[XFRM_POLICY_MAX*2];
 EXPORT_SYMBOL(xfrm_policy_count);
 
@@ -96,25 +97,52 @@ int xfrm_selector_match(struct xfrm_selector *sel, struct flowi *fl,
 	return 0;
 }
 
+static inline struct dst_entry *__xfrm_dst_lookup(int tos,
+						  xfrm_address_t *saddr,
+						  xfrm_address_t *daddr,
+						  int family)
+{
+	struct xfrm_policy_afinfo *afinfo;
+	struct dst_entry *dst;
+
+	afinfo = xfrm_policy_get_afinfo(family);
+	if (unlikely(afinfo == NULL))
+		return ERR_PTR(-EAFNOSUPPORT);
+
+	dst = afinfo->dst_lookup(tos, saddr, daddr);
+
+	xfrm_policy_put_afinfo(afinfo);
+
+	return dst;
+}
+
 static inline struct dst_entry *xfrm_dst_lookup(struct xfrm_state *x, int tos,
+						xfrm_address_t *prev_saddr,
+						xfrm_address_t *prev_daddr,
 						int family)
 {
 	xfrm_address_t *saddr = &x->props.saddr;
 	xfrm_address_t *daddr = &x->id.daddr;
-	struct xfrm_policy_afinfo *afinfo;
 	struct dst_entry *dst;
 
-	if (x->type->flags & XFRM_TYPE_LOCAL_COADDR)
+	if (x->type->flags & XFRM_TYPE_LOCAL_COADDR) {
 		saddr = x->coaddr;
-	if (x->type->flags & XFRM_TYPE_REMOTE_COADDR)
+		daddr = prev_daddr;
+	}
+	if (x->type->flags & XFRM_TYPE_REMOTE_COADDR) {
+		saddr = prev_saddr;
 		daddr = x->coaddr;
+	}
 
-	afinfo = xfrm_policy_get_afinfo(family);
-	if (unlikely(afinfo == NULL))
-		return ERR_PTR(-EAFNOSUPPORT);
+	dst = __xfrm_dst_lookup(tos, saddr, daddr, family);
+
+	if (!IS_ERR(dst)) {
+		if (prev_saddr != saddr)
+			memcpy(prev_saddr, saddr,  sizeof(*prev_saddr));
+		if (prev_daddr != daddr)
+			memcpy(prev_daddr, daddr,  sizeof(*prev_daddr));
+	}
 
-	dst = afinfo->dst_lookup(tos, saddr, daddr);
-	xfrm_policy_put_afinfo(afinfo);
 	return dst;
 }
 
@@ -208,6 +236,7 @@ struct xfrm_policy *xfrm_policy_alloc(gfp_t gfp)
 	policy = kzalloc(sizeof(struct xfrm_policy), gfp);
 
 	if (policy) {
+		INIT_LIST_HEAD(&policy->bytype);
 		INIT_HLIST_NODE(&policy->bydst);
 		INIT_HLIST_NODE(&policy->byidx);
 		rwlock_init(&policy->lock);
@@ -230,7 +259,11 @@ void xfrm_policy_destroy(struct xfrm_policy *policy)
 	if (del_timer(&policy->timer))
 		BUG();
 
-	security_xfrm_policy_free(policy);
+	write_lock_bh(&xfrm_policy_lock);
+	list_del(&policy->bytype);
+	write_unlock_bh(&xfrm_policy_lock);
+
+	security_xfrm_policy_free(policy->security);
 	kfree(policy);
 }
 EXPORT_SYMBOL(xfrm_policy_destroy);
@@ -331,15 +364,31 @@ static void xfrm_dst_hash_transfer(struct hlist_head *list,
 				   struct hlist_head *ndsttable,
 				   unsigned int nhashmask)
 {
-	struct hlist_node *entry, *tmp;
+	struct hlist_node *entry, *tmp, *entry0 = NULL;
 	struct xfrm_policy *pol;
+	unsigned int h0 = 0;
 
+redo:
 	hlist_for_each_entry_safe(pol, entry, tmp, list, bydst) {
 		unsigned int h;
 
 		h = __addr_hash(&pol->selector.daddr, &pol->selector.saddr,
 				pol->family, nhashmask);
-		hlist_add_head(&pol->bydst, ndsttable+h);
+		if (!entry0) {
+			hlist_del(entry);
+			hlist_add_head(&pol->bydst, ndsttable+h);
+			h0 = h;
+		} else {
+			if (h != h0)
+				continue;
+			hlist_del(entry);
+			hlist_add_after(entry0, &pol->bydst);
+		}
+		entry0 = entry;
+	}
+	if (!hlist_empty(list)) {
+		entry0 = NULL;
+		goto redo;
 	}
 }
 
@@ -568,6 +617,7 @@ int xfrm_policy_insert(int dir, struct xfrm_policy *policy, int excl)
 	policy->curlft.use_time = 0;
 	if (!mod_timer(&policy->timer, jiffies + HZ))
 		xfrm_pol_hold(policy);
+	list_add_tail(&policy->bytype, &xfrm_policy_bytype[policy->type]);
 	write_unlock_bh(&xfrm_policy_lock);
 
 	if (delpol)
@@ -626,7 +676,8 @@ struct xfrm_policy *xfrm_policy_bysel_ctx(u8 type, int dir,
 		    xfrm_sec_ctx_match(ctx, pol->security)) {
 			xfrm_pol_hold(pol);
 			if (delete) {
-				*err = security_xfrm_policy_delete(pol);
+				*err = security_xfrm_policy_delete(
+								pol->security);
 				if (*err) {
 					write_unlock_bh(&xfrm_policy_lock);
 					return pol;
@@ -668,7 +719,8 @@ struct xfrm_policy *xfrm_policy_byid(u8 type, int dir, u32 id, int delete,
 		if (pol->type == type && pol->index == id) {
 			xfrm_pol_hold(pol);
 			if (delete) {
-				*err = security_xfrm_policy_delete(pol);
+				*err = security_xfrm_policy_delete(
+								pol->security);
 				if (*err) {
 					write_unlock_bh(&xfrm_policy_lock);
 					return pol;
@@ -706,10 +758,11 @@ xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
 				     &xfrm_policy_inexact[dir], bydst) {
 			if (pol->type != type)
 				continue;
-			err = security_xfrm_policy_delete(pol);
+			err = security_xfrm_policy_delete(pol->security);
 			if (err) {
 				xfrm_audit_policy_delete(pol, 0,
 							 audit_info->loginuid,
+							 audit_info->sessionid,
 							 audit_info->secid);
 				return err;
 			}
@@ -720,10 +773,12 @@ xfrm_policy_flush_secctx_check(u8 type, struct xfrm_audit *audit_info)
 					     bydst) {
 				if (pol->type != type)
 					continue;
-				err = security_xfrm_policy_delete(pol);
+				err = security_xfrm_policy_delete(
+								pol->security);
 				if (err) {
 					xfrm_audit_policy_delete(pol, 0,
 							audit_info->loginuid,
+							audit_info->sessionid,
 							audit_info->secid);
 					return err;
 				}
@@ -766,6 +821,7 @@ int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
 			write_unlock_bh(&xfrm_policy_lock);
 
 			xfrm_audit_policy_delete(pol, 1, audit_info->loginuid,
+						 audit_info->sessionid,
 						 audit_info->secid);
 
 			xfrm_policy_kill(pol);
@@ -788,6 +844,7 @@ int xfrm_policy_flush(u8 type, struct xfrm_audit *audit_info)
 
 				xfrm_audit_policy_delete(pol, 1,
 							 audit_info->loginuid,
+							 audit_info->sessionid,
 							 audit_info->secid);
 				xfrm_policy_kill(pol);
 				killed++;
@@ -806,57 +863,60 @@ out:
 }
 EXPORT_SYMBOL(xfrm_policy_flush);
 
-int xfrm_policy_walk(u8 type, int (*func)(struct xfrm_policy *, int, int, void*),
+int xfrm_policy_walk(struct xfrm_policy_walk *walk,
+		     int (*func)(struct xfrm_policy *, int, int, void*),
 		     void *data)
 {
-	struct xfrm_policy *pol, *last = NULL;
-	struct hlist_node *entry;
-	int dir, last_dir = 0, count, error;
+	struct xfrm_policy *old, *pol, *last = NULL;
+	int error = 0;
+
+	if (walk->type >= XFRM_POLICY_TYPE_MAX &&
+	    walk->type != XFRM_POLICY_TYPE_ANY)
+		return -EINVAL;
+
+	if (walk->policy == NULL && walk->count != 0)
+		return 0;
 
+	old = pol = walk->policy;
+	walk->policy = NULL;
 	read_lock_bh(&xfrm_policy_lock);
-	count = 0;
 
-	for (dir = 0; dir < 2*XFRM_POLICY_MAX; dir++) {
-		struct hlist_head *table = xfrm_policy_bydst[dir].table;
-		int i;
+	for (; walk->cur_type < XFRM_POLICY_TYPE_MAX; walk->cur_type++) {
+		if (walk->type != walk->cur_type &&
+		    walk->type != XFRM_POLICY_TYPE_ANY)
+			continue;
 
-		hlist_for_each_entry(pol, entry,
-				     &xfrm_policy_inexact[dir], bydst) {
-			if (pol->type != type)
+		if (pol == NULL) {
+			pol = list_first_entry(&xfrm_policy_bytype[walk->cur_type],
+					       struct xfrm_policy, bytype);
+		}
+		list_for_each_entry_from(pol, &xfrm_policy_bytype[walk->cur_type], bytype) {
+			if (pol->dead)
 				continue;
 			if (last) {
-				error = func(last, last_dir % XFRM_POLICY_MAX,
-					     count, data);
-				if (error)
+				error = func(last, xfrm_policy_id2dir(last->index),
+					     walk->count, data);
+				if (error) {
+					xfrm_pol_hold(last);
+					walk->policy = last;
 					goto out;
-			}
-			last = pol;
-			last_dir = dir;
-			count++;
-		}
-		for (i = xfrm_policy_bydst[dir].hmask; i >= 0; i--) {
-			hlist_for_each_entry(pol, entry, table + i, bydst) {
-				if (pol->type != type)
-					continue;
-				if (last) {
-					error = func(last, last_dir % XFRM_POLICY_MAX,
-						     count, data);
-					if (error)
-						goto out;
 				}
-				last = pol;
-				last_dir = dir;
-				count++;
 			}
+			last = pol;
+			walk->count++;
 		}
+		pol = NULL;
 	}
-	if (count == 0) {
+	if (walk->count == 0) {
 		error = -ENOENT;
 		goto out;
 	}
-	error = func(last, last_dir % XFRM_POLICY_MAX, 0, data);
+	if (last)
+		error = func(last, xfrm_policy_id2dir(last->index), 0, data);
 out:
 	read_unlock_bh(&xfrm_policy_lock);
+	if (old != NULL)
+		xfrm_pol_put(old);
 	return error;
 }
 EXPORT_SYMBOL(xfrm_policy_walk);
@@ -878,7 +938,8 @@ static int xfrm_policy_match(struct xfrm_policy *pol, struct flowi *fl,
 
 	match = xfrm_selector_match(sel, fl, family);
 	if (match)
-		ret = security_xfrm_policy_lookup(pol, fl->secid, dir);
+		ret = security_xfrm_policy_lookup(pol->security, fl->secid,
+						  dir);
 
 	return ret;
 }
@@ -995,8 +1056,9 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struc
 		int err = 0;
 
 		if (match) {
-			err = security_xfrm_policy_lookup(pol, fl->secid,
-					policy_to_flow_dir(dir));
+			err = security_xfrm_policy_lookup(pol->security,
+						      fl->secid,
+						      policy_to_flow_dir(dir));
 			if (!err)
 				xfrm_pol_hold(pol);
 			else if (err == -ESRCH)
@@ -1085,7 +1147,8 @@ static struct xfrm_policy *clone_policy(struct xfrm_policy *old, int dir)
 
 	if (newp) {
 		newp->selector = old->selector;
-		if (security_xfrm_policy_clone(old, newp)) {
+		if (security_xfrm_policy_clone(old->security,
+					       &newp->security)) {
 			kfree(newp);
 			return NULL;  /* ENOMEM */
 		}
@@ -1328,6 +1391,9 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
 	int trailer_len = 0;
 	int tos;
 	int family = policy->selector.family;
+	xfrm_address_t saddr, daddr;
+
+	xfrm_flowi_addr_get(fl, &saddr, &daddr, family);
 
 	tos = xfrm_get_tos(fl, family);
 	err = tos;
@@ -1358,7 +1424,8 @@ static struct dst_entry *xfrm_bundle_create(struct xfrm_policy *policy,
 
 		if (xfrm[i]->props.mode != XFRM_MODE_TRANSPORT) {
 			family = xfrm[i]->props.family;
-			dst = xfrm_dst_lookup(xfrm[i], tos, family);
+			dst = xfrm_dst_lookup(xfrm[i], tos, &saddr, &daddr,
+					      family);
 			err = PTR_ERR(dst);
 			if (IS_ERR(dst))
 				goto put_states;
@@ -1756,7 +1823,7 @@ xfrm_state_ok(struct xfrm_tmpl *tmpl, struct xfrm_state *x,
 		(x->id.spi == tmpl->id.spi || !tmpl->id.spi) &&
 		(x->props.reqid == tmpl->reqid || !tmpl->reqid) &&
 		x->props.mode == tmpl->mode &&
-		((tmpl->aalgos & (1<<x->props.aalgo)) ||
+		(tmpl->allalgs || (tmpl->aalgos & (1<<x->props.aalgo)) ||
 		 !(xfrm_id_proto_match(tmpl->id.proto, IPSEC_PROTO_ANY))) &&
 		!(x->props.mode != XFRM_MODE_TRANSPORT &&
 		  xfrm_state_addr_cmp(tmpl, x, family));
@@ -2022,7 +2089,7 @@ static int stale_bundle(struct dst_entry *dst)
 void xfrm_dst_ifdown(struct dst_entry *dst, struct net_device *dev)
 {
 	while ((dst = dst->child) && dst->xfrm && dst->dev == dev) {
-		dst->dev = dev->nd_net->loopback_dev;
+		dst->dev = dev_net(dev)->loopback_dev;
 		dev_hold(dst->dev);
 		dev_put(dev);
 	}
@@ -2293,7 +2360,7 @@ static int xfrm_dev_event(struct notifier_block *this, unsigned long event, void
 {
 	struct net_device *dev = ptr;
 
-	if (dev->nd_net != &init_net)
+	if (!net_eq(dev_net(dev), &init_net))
 		return NOTIFY_DONE;
 
 	switch (event) {
@@ -2349,6 +2416,9 @@ static void __init xfrm_policy_init(void)
 			panic("XFRM: failed to allocate bydst hash\n");
 	}
 
+	for (dir = 0; dir < XFRM_POLICY_TYPE_MAX; dir++)
+		INIT_LIST_HEAD(&xfrm_policy_bytype[dir]);
+
 	INIT_WORK(&xfrm_policy_gc_work, xfrm_policy_gc_task);
 	register_netdevice_notifier(&xfrm_dev_notifier);
 }
@@ -2406,14 +2476,14 @@ static void xfrm_audit_common_policyinfo(struct xfrm_policy *xp,
 }
 
 void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
-			   u32 auid, u32 secid)
+			   uid_t auid, u32 sessionid, u32 secid)
 {
 	struct audit_buffer *audit_buf;
 
 	audit_buf = xfrm_audit_start("SPD-add");
 	if (audit_buf == NULL)
 		return;
-	xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+	xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
 	audit_log_format(audit_buf, " res=%u", result);
 	xfrm_audit_common_policyinfo(xp, audit_buf);
 	audit_log_end(audit_buf);
@@ -2421,14 +2491,14 @@ void xfrm_audit_policy_add(struct xfrm_policy *xp, int result,
 EXPORT_SYMBOL_GPL(xfrm_audit_policy_add);
 
 void xfrm_audit_policy_delete(struct xfrm_policy *xp, int result,
-			      u32 auid, u32 secid)
+			      uid_t auid, u32 sessionid, u32 secid)
 {
 	struct audit_buffer *audit_buf;
 
 	audit_buf = xfrm_audit_start("SPD-delete");
 	if (audit_buf == NULL)
 		return;
-	xfrm_audit_helper_usrinfo(auid, secid, audit_buf);
+	xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf);
 	audit_log_format(audit_buf, " res=%u", result);
 	xfrm_audit_common_policyinfo(xp, audit_buf);
 	audit_log_end(audit_buf);