summaryrefslogtreecommitdiffstats
path: root/net/ipv4/route.c
diff options
context:
space:
mode:
Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c34
1 files changed, 23 insertions, 11 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 6ee5354..a6d7c58 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -282,6 +282,8 @@ 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 (!rt_hash_table[st->bucket].chain)
+ continue;
rcu_read_lock_bh();
r = rcu_dereference(rt_hash_table[st->bucket].chain);
while (r) {
@@ -299,11 +301,14 @@ static struct rtable *__rt_cache_get_next(struct seq_file *seq,
struct rtable *r)
{
struct rt_cache_iter_state *st = seq->private;
+
r = r->u.dst.rt_next;
while (!r) {
rcu_read_unlock_bh();
- if (--st->bucket < 0)
- break;
+ do {
+ if (--st->bucket < 0)
+ return NULL;
+ } while (!rt_hash_table[st->bucket].chain);
rcu_read_lock_bh();
r = rt_hash_table[st->bucket].chain;
}
@@ -2356,11 +2361,6 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
ipv4_is_zeronet(oldflp->fl4_src))
goto out;
- /* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
- dev_out = ip_dev_find(net, oldflp->fl4_src);
- if (dev_out == NULL)
- goto out;
-
/* I removed check for oif == dev_out->oif here.
It was wrong for two reasons:
1. ip_dev_find(net, saddr) can return wrong iface, if saddr
@@ -2372,6 +2372,11 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
if (oldflp->oif == 0
&& (ipv4_is_multicast(oldflp->fl4_dst) ||
oldflp->fl4_dst == htonl(0xFFFFFFFF))) {
+ /* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
+ dev_out = ip_dev_find(net, oldflp->fl4_src);
+ if (dev_out == NULL)
+ goto out;
+
/* Special hack: user can direct multicasts
and limited broadcast via necessary interface
without fiddling with IP_MULTICAST_IF or IP_PKTINFO.
@@ -2390,9 +2395,15 @@ static int ip_route_output_slow(struct net *net, struct rtable **rp,
fl.oif = dev_out->ifindex;
goto make_route;
}
- if (dev_out)
+
+ if (!(oldflp->flags & FLOWI_FLAG_ANYSRC)) {
+ /* It is equivalent to inet_addr_type(saddr) == RTN_LOCAL */
+ dev_out = ip_dev_find(net, oldflp->fl4_src);
+ if (dev_out == NULL)
+ goto out;
dev_put(dev_out);
- dev_out = NULL;
+ dev_out = NULL;
+ }
}
@@ -2840,7 +2851,9 @@ int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb)
if (s_h < 0)
s_h = 0;
s_idx = idx = cb->args[1];
- for (h = s_h; h <= rt_hash_mask; h++) {
+ for (h = s_h; h <= rt_hash_mask; h++, s_idx = 0) {
+ if (!rt_hash_table[h].chain)
+ continue;
rcu_read_lock_bh();
for (rt = rcu_dereference(rt_hash_table[h].chain), idx = 0; rt;
rt = rcu_dereference(rt->u.dst.rt_next), idx++) {
@@ -2859,7 +2872,6 @@ int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb)
dst_release(xchg(&skb->dst, NULL));
}
rcu_read_unlock_bh();
- s_idx = 0;
}
done:
OpenPOWER on IntegriCloud