[NETNS][IPV6]: inet6_addr - make ipv6_chk_home_addr namespace aware

[powerpc.git] / net / ipv6 / fib6_rules.c

diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c
index ea3035b..76437a1 100644 (file)
--- a/net/ipv6/fib6_rules.c
+++ b/net/ipv6/fib6_rules.c
@@ -17,6 +17,7 @@
 
 #include <net/fib_rules.h>
 #include <net/ipv6.h>
+#include <net/addrconf.h>
 #include <net/ip6_route.h>
 #include <net/netlink.h>
 
@@ -30,27 +31,6 @@ struct fib6_rule
 
 static struct fib_rules_ops fib6_rules_ops;
 
-static struct fib6_rule main_rule = {
-       .common = {
-               .refcnt =       ATOMIC_INIT(2),
-               .pref =         0x7FFE,
-               .action =       FR_ACT_TO_TBL,
-               .table =        RT6_TABLE_MAIN,
-       },
-};
-
-static struct fib6_rule local_rule = {
-       .common = {
-               .refcnt =       ATOMIC_INIT(2),
-               .pref =         0,
-               .action =       FR_ACT_TO_TBL,
-               .table =        RT6_TABLE_LOCAL,
-               .flags =        FIB_RULE_PERMANENT,
-       },
-};
-
-static LIST_HEAD(fib6_rules);
-
 struct dst_entry *fib6_rule_lookup(struct flowi *fl, int flags,
                                   pol_lookup_t lookup)
 {
@@ -95,8 +75,27 @@ static int fib6_rule_action(struct fib_rule *rule, struct flowi *flp,
        if (table)
                rt = lookup(table, flp, flags);
 
-       if (rt != &ip6_null_entry)
+       if (rt != &ip6_null_entry) {
+               struct fib6_rule *r = (struct fib6_rule *)rule;
+
+               /*
+                * If we need to find a source address for this traffic,
+                * we check the result if it meets requirement of the rule.
+                */
+               if ((rule->flags & FIB_RULE_FIND_SADDR) &&
+                   r->src.plen && !(flags & RT6_LOOKUP_F_HAS_SADDR)) {
+                       struct in6_addr saddr;
+                       if (ipv6_get_saddr(&rt->u.dst, &flp->fl6_dst,
+                                          &saddr))
+                               goto again;
+                       if (!ipv6_prefix_equal(&saddr, &r->src.addr,
+                                              r->src.plen))
+                               goto again;
+                       ipv6_addr_copy(&flp->fl6_src, &saddr);
+               }
                goto out;
+       }
+again:
        dst_release(&rt->u.dst);
        rt = NULL;
        goto out;
@@ -117,9 +116,17 @@ static int fib6_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
            !ipv6_prefix_equal(&fl->fl6_dst, &r->dst.addr, r->dst.plen))
                return 0;
 
+       /*
+        * If FIB_RULE_FIND_SADDR is set and we do not have a
+        * source address for the traffic, we defer check for
+        * source address.
+        */
        if (r->src.plen) {
-               if (!(flags & RT6_LOOKUP_F_HAS_SADDR) ||
-                   !ipv6_prefix_equal(&fl->fl6_src, &r->src.addr, r->src.plen))
+               if (flags & RT6_LOOKUP_F_HAS_SADDR) {
+                       if (!ipv6_prefix_equal(&fl->fl6_src, &r->src.addr,
+                                              r->src.plen))
+                               return 0;
+               } else if (!(r->common.flags & FIB_RULE_FIND_SADDR))
                        return 0;
        }
 
@@ -129,7 +136,7 @@ static int fib6_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
        return 1;
 }
 
-static struct nla_policy fib6_rule_policy[FRA_MAX+1] __read_mostly = {
+static const struct nla_policy fib6_rule_policy[FRA_MAX+1] = {
        FRA_GENERIC_POLICY,
 };
 
@@ -216,12 +223,7 @@ nla_put_failure:
        return -ENOBUFS;
 }
 
-int fib6_rules_dump(struct sk_buff *skb, struct netlink_callback *cb)
-{
-       return fib_rules_dump(skb, cb, AF_INET6);
-}
-
-static u32 fib6_rule_default_pref(void)
+static u32 fib6_rule_default_pref(struct fib_rules_ops *ops)
 {
        return 0x3FFF;
 }
@@ -245,19 +247,44 @@ static struct fib_rules_ops fib6_rules_ops = {
        .nlmsg_payload          = fib6_rule_nlmsg_payload,
        .nlgroup                = RTNLGRP_IPV6_RULE,
        .policy                 = fib6_rule_policy,
-       .rules_list             = &fib6_rules,
+       .rules_list             = LIST_HEAD_INIT(fib6_rules_ops.rules_list),
        .owner                  = THIS_MODULE,
 };
 
-void __init fib6_rules_init(void)
+static int __init fib6_default_rules_init(void)
 {
-       list_add_tail(&local_rule.common.list, &fib6_rules);
-       list_add_tail(&main_rule.common.list, &fib6_rules);
+       int err;
+
+       err = fib_default_rule_add(&fib6_rules_ops, 0,
+                                  RT6_TABLE_LOCAL, FIB_RULE_PERMANENT);
+       if (err < 0)
+               return err;
+       err = fib_default_rule_add(&fib6_rules_ops, 0x7FFE, RT6_TABLE_MAIN, 0);
+       if (err < 0)
+               return err;
+       return 0;
+}
 
-       fib_rules_register(&fib6_rules_ops);
+int __init fib6_rules_init(void)
+{
+       int ret;
+
+       ret = fib6_default_rules_init();
+       if (ret)
+               goto out;
+
+       ret = fib_rules_register(&init_net, &fib6_rules_ops);
+       if (ret)
+               goto out_default_rules_init;
+out:
+       return ret;
+
+out_default_rules_init:
+       fib_rules_cleanup_ops(&fib6_rules_ops);
+       goto out;
 }
 
 void fib6_rules_cleanup(void)
 {
-       fib_rules_unregister(&fib6_rules_ops);
+       fib_rules_unregister(&init_net, &fib6_rules_ops);
 }