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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6
[pandora-kernel.git]
/
net
/
ipv4
/
route.c
diff --git
a/net/ipv4/route.c
b/net/ipv4/route.c
index
6ee5354
..
2ea6dcc
100644
(file)
--- 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) {
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) {
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;
struct rtable *r)
{
struct rt_cache_iter_state *st = seq->private;
+
r = r->u.dst.rt_next;
while (!r) {
rcu_read_unlock_bh();
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;
}
rcu_read_lock_bh();
r = rt_hash_table[st->bucket].chain;
}
@@
-1104,7
+1109,12
@@
restart:
printk("\n");
}
#endif
printk("\n");
}
#endif
- rt_hash_table[hash].chain = rt;
+ /*
+ * Since lookup is lockfree, we must make sure
+ * previous writes to rt are comitted to memory
+ * before making rt visible to other CPUS.
+ */
+ rcu_assign_pointer(rt_hash_table[hash].chain, rt);
spin_unlock_bh(rt_hash_lock_addr(hash));
*rp = rt;
return 0;
spin_unlock_bh(rt_hash_lock_addr(hash));
*rp = rt;
return 0;
@@
-2356,11
+2366,6
@@
static int ip_route_output_slow(struct net *net, struct rtable **rp,
ipv4_is_zeronet(oldflp->fl4_src))
goto out;
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
/* 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
+2377,11
@@
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))) {
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.
/* Special hack: user can direct multicasts
and limited broadcast via necessary interface
without fiddling with IP_MULTICAST_IF or IP_PKTINFO.
@@
-2390,9
+2400,15
@@
static int ip_route_output_slow(struct net *net, struct rtable **rp,
fl.oif = dev_out->ifindex;
goto make_route;
}
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_put(dev_out);
- dev_out = NULL;
+ dev_out = NULL;
+ }
}
}
@@
-2840,7
+2856,9
@@
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];
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++) {
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
+2877,6
@@
int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb)
dst_release(xchg(&skb->dst, NULL));
}
rcu_read_unlock_bh();
dst_release(xchg(&skb->dst, NULL));
}
rcu_read_unlock_bh();
- s_idx = 0;
}
done:
}
done:
@@
-2896,8
+2913,6
@@
static int ipv4_sysctl_rtcache_flush(ctl_table *__ctl, int write,
}
static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table,
}
static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table,
- int __user *name,
- int nlen,
void __user *oldval,
size_t __user *oldlenp,
void __user *newval,
void __user *oldval,
size_t __user *oldlenp,
void __user *newval,
@@
-2960,16
+2975,13
@@
static int ipv4_sysctl_rt_secret_interval(ctl_table *ctl, int write,
}
static int ipv4_sysctl_rt_secret_interval_strategy(ctl_table *table,
}
static int ipv4_sysctl_rt_secret_interval_strategy(ctl_table *table,
- int __user *name,
- int nlen,
void __user *oldval,
size_t __user *oldlenp,
void __user *newval,
size_t newlen)
{
int old = ip_rt_secret_interval;
void __user *oldval,
size_t __user *oldlenp,
void __user *newval,
size_t newlen)
{
int old = ip_rt_secret_interval;
- int ret = sysctl_jiffies(table, name, nlen, oldval, oldlenp, newval,
- newlen);
+ int ret = sysctl_jiffies(table, oldval, oldlenp, newval, newlen);
rt_secret_reschedule(old);
rt_secret_reschedule(old);