[NETNS]: Process /proc/net/rt_cache inside a namespace.

Show routing cache for a particular namespace only.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 3 deletions

diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index f9654f2ae5b3..af0b23ad93ba 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -273,6 +273,7 @@ static unsigned int rt_hash_code(u32 daddr, u32 saddr)
 
 #ifdef CONFIG_PROC_FS
 struct rt_cache_iter_state {
+        struct seq_net_private p;
         int bucket;
         int genid;
 };
@@ -285,7 +286,8 @@ static struct rtable *rt_cache_get_first(struct rt_cache_iter_state *st)
                 rcu_read_lock_bh();
                 r = rcu_dereference(rt_hash_table[st->bucket].chain);
                 while (r) {
-                        if (r->rt_genid == st->genid)
+                        if (r->u.dst.dev->nd_net == st->p.net &&
+                            r->rt_genid == st->genid)
                                 return r;
                         r = rcu_dereference(r->u.dst.rt_next);
                 }
@@ -312,6 +314,8 @@ static struct rtable *rt_cache_get_next(struct rt_cache_iter_state *st,
                                         struct rtable *r)
 {
         while ((r = __rt_cache_get_next(st, r)) != NULL) {
+                if (r->u.dst.dev->nd_net != st->p.net)
+                        continue;
                 if (r->rt_genid == st->genid)
                         break;
         }
@@ -398,7 +402,7 @@ static const struct seq_operations rt_cache_seq_ops = {
 
 static int rt_cache_seq_open(struct inode *inode, struct file *file)
 {
-        return seq_open_private(file, &rt_cache_seq_ops,
+        return seq_open_net(inode, file, &rt_cache_seq_ops,
                         sizeof(struct rt_cache_iter_state));
 }
 
@@ -407,7 +411,7 @@ static const struct file_operations rt_cache_seq_fops = {
         .open    = rt_cache_seq_open,
         .read    = seq_read,
         .llseek  = seq_lseek,
-        .release = seq_release_private,
+        .release = seq_release_net,
 };