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Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c53
1 files changed, 35 insertions, 18 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 075212e41b83..155138d8ec8b 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -120,7 +120,6 @@
static int ip_rt_max_size;
static int ip_rt_gc_timeout __read_mostly = RT_GC_TIMEOUT;
-static int ip_rt_gc_interval __read_mostly = 60 * HZ;
static int ip_rt_gc_min_interval __read_mostly = HZ / 2;
static int ip_rt_redirect_number __read_mostly = 9;
static int ip_rt_redirect_load __read_mostly = HZ / 50;
@@ -324,7 +323,7 @@ static struct rtable *rt_cache_get_first(struct seq_file *seq)
struct rtable *r = NULL;
for (st->bucket = rt_hash_mask; st->bucket >= 0; --st->bucket) {
- if (!rcu_dereference_raw(rt_hash_table[st->bucket].chain))
+ if (!rcu_access_pointer(rt_hash_table[st->bucket].chain))
continue;
rcu_read_lock_bh();
r = rcu_dereference_bh(rt_hash_table[st->bucket].chain);
@@ -350,7 +349,7 @@ static struct rtable *__rt_cache_get_next(struct seq_file *seq,
do {
if (--st->bucket < 0)
return NULL;
- } while (!rcu_dereference_raw(rt_hash_table[st->bucket].chain));
+ } while (!rcu_access_pointer(rt_hash_table[st->bucket].chain));
rcu_read_lock_bh();
r = rcu_dereference_bh(rt_hash_table[st->bucket].chain);
}
@@ -761,7 +760,7 @@ static void rt_do_flush(struct net *net, int process_context)
if (process_context && need_resched())
cond_resched();
- rth = rcu_dereference_raw(rt_hash_table[i].chain);
+ rth = rcu_access_pointer(rt_hash_table[i].chain);
if (!rth)
continue;
@@ -1309,7 +1308,12 @@ static void rt_del(unsigned hash, struct rtable *rt)
void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
__be32 saddr, struct net_device *dev)
{
+ int s, i;
struct in_device *in_dev = __in_dev_get_rcu(dev);
+ struct rtable *rt;
+ __be32 skeys[2] = { saddr, 0 };
+ int ikeys[2] = { dev->ifindex, 0 };
+ struct flowi4 fl4;
struct inet_peer *peer;
struct net *net;
@@ -1332,13 +1336,34 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
goto reject_redirect;
}
- peer = inet_getpeer_v4(daddr, 1);
- if (peer) {
- peer->redirect_learned.a4 = new_gw;
+ memset(&fl4, 0, sizeof(fl4));
+ fl4.daddr = daddr;
+ for (s = 0; s < 2; s++) {
+ for (i = 0; i < 2; i++) {
+ fl4.flowi4_oif = ikeys[i];
+ fl4.saddr = skeys[s];
+ rt = __ip_route_output_key(net, &fl4);
+ if (IS_ERR(rt))
+ continue;
- inet_putpeer(peer);
+ if (rt->dst.error || rt->dst.dev != dev ||
+ rt->rt_gateway != old_gw) {
+ ip_rt_put(rt);
+ continue;
+ }
+
+ if (!rt->peer)
+ rt_bind_peer(rt, rt->rt_dst, 1);
+
+ peer = rt->peer;
+ if (peer) {
+ peer->redirect_learned.a4 = new_gw;
+ atomic_inc(&__rt_peer_genid);
+ }
- atomic_inc(&__rt_peer_genid);
+ ip_rt_put(rt);
+ return;
+ }
}
return;
@@ -1568,11 +1593,10 @@ unsigned short ip_rt_frag_needed(struct net *net, const struct iphdr *iph,
est_mtu = mtu;
peer->pmtu_learned = mtu;
peer->pmtu_expires = pmtu_expires;
+ atomic_inc(&__rt_peer_genid);
}
inet_putpeer(peer);
-
- atomic_inc(&__rt_peer_genid);
}
return est_mtu ? : new_mtu;
}
@@ -3121,13 +3145,6 @@ static ctl_table ipv4_route_table[] = {
.proc_handler = proc_dointvec_jiffies,
},
{
- .procname = "gc_interval",
- .data = &ip_rt_gc_interval,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_jiffies,
- },
- {
.procname = "redirect_load",
.data = &ip_rt_redirect_load,
.maxlen = sizeof(int),