]> pilppa.org Git - linux-2.6-omap-h63xx.git/blobdiff - net/ipv6/route.c
[NET]: Make rtnetlink infrastructure network namespace aware (v3)
[linux-2.6-omap-h63xx.git] / net / ipv6 / route.c
index 95f8e4a62f68f6048f01e964ae1b619d9e90a947..d7ec4c9ffc4baa35a091d907652dae923715210d 100644 (file)
 #include <linux/in6.h>
 #include <linux/init.h>
 #include <linux/if_arp.h>
-
-#ifdef         CONFIG_PROC_FS
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
-#endif
-
 #include <net/net_namespace.h>
 #include <net/snmp.h>
 #include <net/ipv6.h>
@@ -117,6 +113,7 @@ static struct dst_ops ip6_dst_ops = {
        .negative_advice        =       ip6_negative_advice,
        .link_failure           =       ip6_link_failure,
        .update_pmtu            =       ip6_rt_update_pmtu,
+       .local_out              =       ip6_local_out,
        .entry_size             =       sizeof(struct rt6_info),
 };
 
@@ -156,7 +153,6 @@ struct rt6_info ip6_null_entry = {
 
 static int ip6_pkt_prohibit(struct sk_buff *skb);
 static int ip6_pkt_prohibit_out(struct sk_buff *skb);
-static int ip6_pkt_blk_hole(struct sk_buff *skb);
 
 struct rt6_info ip6_prohibit_entry = {
        .u = {
@@ -185,8 +181,8 @@ struct rt6_info ip6_blk_hole_entry = {
                        .obsolete       = -1,
                        .error          = -EINVAL,
                        .metrics        = { [RTAX_HOPLIMIT - 1] = 255, },
-                       .input          = ip6_pkt_blk_hole,
-                       .output         = ip6_pkt_blk_hole,
+                       .input          = dst_discard,
+                       .output         = dst_discard,
                        .ops            = &ip6_dst_ops,
                        .path           = (struct dst_entry*)&ip6_blk_hole_entry,
                }
@@ -333,7 +329,7 @@ static inline int rt6_check_dev(struct rt6_info *rt, int oif)
 static inline int rt6_check_neigh(struct rt6_info *rt)
 {
        struct neighbour *neigh = rt->rt6i_nexthop;
-       int m = 0;
+       int m;
        if (rt->rt6i_flags & RTF_NONEXTHOP ||
            !(rt->rt6i_flags & RTF_GATEWAY))
                m = 1;
@@ -341,10 +337,15 @@ static inline int rt6_check_neigh(struct rt6_info *rt)
                read_lock_bh(&neigh->lock);
                if (neigh->nud_state & NUD_VALID)
                        m = 2;
-               else if (!(neigh->nud_state & NUD_FAILED))
+#ifdef CONFIG_IPV6_ROUTER_PREF
+               else if (neigh->nud_state & NUD_FAILED)
+                       m = 0;
+#endif
+               else
                        m = 1;
                read_unlock_bh(&neigh->lock);
-       }
+       } else
+               m = 0;
        return m;
 }
 
@@ -548,12 +549,8 @@ restart:
        rt = rt6_device_match(rt, fl->oif, flags);
        BACKTRACK(&fl->fl6_src);
 out:
-       dst_hold(&rt->u.dst);
+       dst_use(&rt->u.dst, jiffies);
        read_unlock_bh(&table->tb6_lock);
-
-       rt->u.dst.lastuse = jiffies;
-       rt->u.dst.__use++;
-
        return rt;
 
 }
@@ -785,12 +782,6 @@ struct dst_entry * ip6_route_output(struct sock *sk, struct flowi *fl)
 
 EXPORT_SYMBOL(ip6_route_output);
 
-static int ip6_blackhole_output(struct sk_buff *skb)
-{
-       kfree_skb(skb);
-       return 0;
-}
-
 int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl)
 {
        struct rt6_info *ort = (struct rt6_info *) *dstp;
@@ -803,8 +794,8 @@ int ip6_dst_blackhole(struct sock *sk, struct dst_entry **dstp, struct flowi *fl
 
                atomic_set(&new->__refcnt, 1);
                new->__use = 1;
-               new->input = ip6_blackhole_output;
-               new->output = ip6_blackhole_output;
+               new->input = dst_discard;
+               new->output = dst_discard;
 
                memcpy(new->metrics, ort->u.dst.metrics, RTAX_MAX*sizeof(u32));
                new->dev = ort->u.dst.dev;
@@ -1814,12 +1805,6 @@ static int ip6_pkt_prohibit_out(struct sk_buff *skb)
        return ip6_pkt_drop(skb, ICMPV6_ADM_PROHIBITED, IPSTATS_MIB_OUTNOROUTES);
 }
 
-static int ip6_pkt_blk_hole(struct sk_buff *skb)
-{
-       kfree_skb(skb);
-       return 0;
-}
-
 #endif
 
 /*
@@ -2018,9 +2003,13 @@ errout:
 
 static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 {
+       struct net *net = skb->sk->sk_net;
        struct fib6_config cfg;
        int err;
 
+       if (net != &init_net)
+               return -EINVAL;
+
        err = rtm_to_fib6_config(skb, nlh, &cfg);
        if (err < 0)
                return err;
@@ -2030,9 +2019,13 @@ static int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *a
 
 static int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg)
 {
+       struct net *net = skb->sk->sk_net;
        struct fib6_config cfg;
        int err;
 
+       if (net != &init_net)
+               return -EINVAL;
+
        err = rtm_to_fib6_config(skb, nlh, &cfg);
        if (err < 0)
                return err;
@@ -2167,6 +2160,7 @@ int rt6_dump_route(struct rt6_info *rt, void *p_arg)
 
 static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 {
+       struct net *net = in_skb->sk->sk_net;
        struct nlattr *tb[RTA_MAX+1];
        struct rt6_info *rt;
        struct sk_buff *skb;
@@ -2174,6 +2168,9 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
        struct flowi fl;
        int err, iif = 0;
 
+       if (net != &init_net)
+               return -EINVAL;
+
        err = nlmsg_parse(nlh, sizeof(*rtm), tb, RTA_MAX, rtm_ipv6_policy);
        if (err < 0)
                goto errout;
@@ -2233,7 +2230,7 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
                goto errout;
        }
 
-       err = rtnl_unicast(skb, NETLINK_CB(in_skb).pid);
+       err = rtnl_unicast(skb, &init_net, NETLINK_CB(in_skb).pid);
 errout:
        return err;
 }
@@ -2263,10 +2260,10 @@ void inet6_rt_notify(int event, struct rt6_info *rt, struct nl_info *info)
                kfree_skb(skb);
                goto errout;
        }
-       err = rtnl_notify(skb, pid, RTNLGRP_IPV6_ROUTE, nlh, gfp_any());
+       err = rtnl_notify(skb, &init_net, pid, RTNLGRP_IPV6_ROUTE, nlh, gfp_any());
 errout:
        if (err < 0)
-               rtnl_set_sk_err(RTNLGRP_IPV6_ROUTE, err);
+               rtnl_set_sk_err(&init_net, RTNLGRP_IPV6_ROUTE, err);
 }
 
 /*
@@ -2288,71 +2285,50 @@ struct rt6_proc_arg
 
 static int rt6_info_route(struct rt6_info *rt, void *p_arg)
 {
-       struct rt6_proc_arg *arg = (struct rt6_proc_arg *) p_arg;
+       struct seq_file *m = p_arg;
 
-       if (arg->skip < arg->offset / RT6_INFO_LEN) {
-               arg->skip++;
-               return 0;
-       }
-
-       if (arg->len >= arg->length)
-               return 0;
-
-       arg->len += sprintf(arg->buffer + arg->len,
-                           NIP6_SEQFMT " %02x ",
-                           NIP6(rt->rt6i_dst.addr),
-                           rt->rt6i_dst.plen);
+       seq_printf(m, NIP6_SEQFMT " %02x ", NIP6(rt->rt6i_dst.addr),
+                  rt->rt6i_dst.plen);
 
 #ifdef CONFIG_IPV6_SUBTREES
-       arg->len += sprintf(arg->buffer + arg->len,
-                           NIP6_SEQFMT " %02x ",
-                           NIP6(rt->rt6i_src.addr),
-                           rt->rt6i_src.plen);
+       seq_printf(m, NIP6_SEQFMT " %02x ", NIP6(rt->rt6i_src.addr),
+                  rt->rt6i_src.plen);
 #else
-       arg->len += sprintf(arg->buffer + arg->len,
-                           "00000000000000000000000000000000 00 ");
+       seq_puts(m, "00000000000000000000000000000000 00 ");
 #endif
 
        if (rt->rt6i_nexthop) {
-               arg->len += sprintf(arg->buffer + arg->len,
-                                   NIP6_SEQFMT,
-                                   NIP6(*((struct in6_addr *)rt->rt6i_nexthop->primary_key)));
+               seq_printf(m, NIP6_SEQFMT,
+                          NIP6(*((struct in6_addr *)rt->rt6i_nexthop->primary_key)));
        } else {
-               arg->len += sprintf(arg->buffer + arg->len,
-                                   "00000000000000000000000000000000");
+               seq_puts(m, "00000000000000000000000000000000");
        }
-       arg->len += sprintf(arg->buffer + arg->len,
-                           " %08x %08x %08x %08x %8s\n",
-                           rt->rt6i_metric, atomic_read(&rt->u.dst.__refcnt),
-                           rt->u.dst.__use, rt->rt6i_flags,
-                           rt->rt6i_dev ? rt->rt6i_dev->name : "");
+       seq_printf(m, " %08x %08x %08x %08x %8s\n",
+                  rt->rt6i_metric, atomic_read(&rt->u.dst.__refcnt),
+                  rt->u.dst.__use, rt->rt6i_flags,
+                  rt->rt6i_dev ? rt->rt6i_dev->name : "");
        return 0;
 }
 
-static int rt6_proc_info(char *buffer, char **start, off_t offset, int length)
+static int ipv6_route_show(struct seq_file *m, void *v)
 {
-       struct rt6_proc_arg arg = {
-               .buffer = buffer,
-               .offset = offset,
-               .length = length,
-       };
-
-       fib6_clean_all(rt6_info_route, 0, &arg);
-
-       *start = buffer;
-       if (offset)
-               *start += offset % RT6_INFO_LEN;
-
-       arg.len -= offset % RT6_INFO_LEN;
-
-       if (arg.len > length)
-               arg.len = length;
-       if (arg.len < 0)
-               arg.len = 0;
+       fib6_clean_all(rt6_info_route, 0, m);
+       return 0;
+}
 
-       return arg.len;
+static int ipv6_route_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, ipv6_route_show, NULL);
 }
 
+static const struct file_operations ipv6_route_proc_fops = {
+       .owner          = THIS_MODULE,
+       .open           = ipv6_route_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+};
+
 static int rt6_stats_seq_show(struct seq_file *seq, void *v)
 {
        seq_printf(seq, "%04x %04x %04x %04x %04x %04x %04x\n",
@@ -2489,22 +2465,14 @@ ctl_table ipv6_route_table[] = {
 
 void __init ip6_route_init(void)
 {
-#ifdef         CONFIG_PROC_FS
-       struct proc_dir_entry *p;
-#endif
        ip6_dst_ops.kmem_cachep =
                kmem_cache_create("ip6_dst_cache", sizeof(struct rt6_info), 0,
                                  SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
        ip6_dst_blackhole_ops.kmem_cachep = ip6_dst_ops.kmem_cachep;
 
        fib6_init();
-#ifdef         CONFIG_PROC_FS
-       p = proc_net_create(&init_net, "ipv6_route", 0, rt6_proc_info);
-       if (p)
-               p->owner = THIS_MODULE;
-
+       proc_net_fops_create(&init_net, "ipv6_route", 0, &ipv6_route_proc_fops);
        proc_net_fops_create(&init_net, "rt6_stats", S_IRUGO, &rt6_stats_seq_fops);
-#endif
 #ifdef CONFIG_XFRM
        xfrm6_init();
 #endif