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Diffstat (limited to 'net/ipv4/route.c')
-rw-r--r--net/ipv4/route.c54
1 files changed, 33 insertions, 21 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index 28205e5bfa9b..cd76b3cb7092 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -131,8 +131,8 @@ static int ip_rt_min_advmss __read_mostly = 256;
static int ip_rt_secret_interval __read_mostly = 10 * 60 * HZ;
static int rt_chain_length_max __read_mostly = 20;
-static void rt_worker_func(struct work_struct *work);
-static DECLARE_DELAYED_WORK(expires_work, rt_worker_func);
+static struct delayed_work expires_work;
+static unsigned long expires_ljiffies;
/*
* Interface to generic destination cache.
@@ -787,9 +787,12 @@ static void rt_check_expire(void)
struct rtable *rth, *aux, **rthp;
unsigned long samples = 0;
unsigned long sum = 0, sum2 = 0;
+ unsigned long delta;
u64 mult;
- mult = ((u64)ip_rt_gc_interval) << rt_hash_log;
+ delta = jiffies - expires_ljiffies;
+ expires_ljiffies = jiffies;
+ mult = ((u64)delta) << rt_hash_log;
if (ip_rt_gc_timeout > 1)
do_div(mult, ip_rt_gc_timeout);
goal = (unsigned int)mult;
@@ -1064,7 +1067,8 @@ work_done:
out: return 0;
}
-static int rt_intern_hash(unsigned hash, struct rtable *rt, struct rtable **rp)
+static int rt_intern_hash(unsigned hash, struct rtable *rt,
+ struct rtable **rp, struct sk_buff *skb)
{
struct rtable *rth, **rthp;
unsigned long now;
@@ -1114,7 +1118,10 @@ restart:
spin_unlock_bh(rt_hash_lock_addr(hash));
rt_drop(rt);
- *rp = rth;
+ if (rp)
+ *rp = rth;
+ else
+ skb_dst_set(skb, &rth->u.dst);
return 0;
}
@@ -1210,7 +1217,10 @@ restart:
rcu_assign_pointer(rt_hash_table[hash].chain, rt);
spin_unlock_bh(rt_hash_lock_addr(hash));
- *rp = rt;
+ if (rp)
+ *rp = rt;
+ else
+ skb_dst_set(skb, &rt->u.dst);
return 0;
}
@@ -1407,7 +1417,7 @@ void ip_rt_redirect(__be32 old_gw, __be32 daddr, __be32 new_gw,
&netevent);
rt_del(hash, rth);
- if (!rt_intern_hash(hash, rt, &rt))
+ if (!rt_intern_hash(hash, rt, &rt, NULL))
ip_rt_put(rt);
goto do_next;
}
@@ -1473,7 +1483,7 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
void ip_rt_send_redirect(struct sk_buff *skb)
{
- struct rtable *rt = skb->rtable;
+ struct rtable *rt = skb_rtable(skb);
struct in_device *in_dev = in_dev_get(rt->u.dst.dev);
if (!in_dev)
@@ -1521,7 +1531,7 @@ out:
static int ip_error(struct sk_buff *skb)
{
- struct rtable *rt = skb->rtable;
+ struct rtable *rt = skb_rtable(skb);
unsigned long now;
int code;
@@ -1698,7 +1708,7 @@ static void ipv4_link_failure(struct sk_buff *skb)
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0);
- rt = skb->rtable;
+ rt = skb_rtable(skb);
if (rt)
dst_set_expires(&rt->u.dst, 0);
}
@@ -1858,7 +1868,7 @@ static int ip_route_input_mc(struct sk_buff *skb, __be32 daddr, __be32 saddr,
in_dev_put(in_dev);
hash = rt_hash(daddr, saddr, dev->ifindex, rt_genid(dev_net(dev)));
- return rt_intern_hash(hash, rth, &skb->rtable);
+ return rt_intern_hash(hash, rth, NULL, skb);
e_nobufs:
in_dev_put(in_dev);
@@ -2019,7 +2029,7 @@ static int ip_mkroute_input(struct sk_buff *skb,
/* put it into the cache */
hash = rt_hash(daddr, saddr, fl->iif,
rt_genid(dev_net(rth->u.dst.dev)));
- return rt_intern_hash(hash, rth, &skb->rtable);
+ return rt_intern_hash(hash, rth, NULL, skb);
}
/*
@@ -2175,7 +2185,7 @@ local_input:
}
rth->rt_type = res.type;
hash = rt_hash(daddr, saddr, fl.iif, rt_genid(net));
- err = rt_intern_hash(hash, rth, &skb->rtable);
+ err = rt_intern_hash(hash, rth, NULL, skb);
goto done;
no_route:
@@ -2244,7 +2254,7 @@ int ip_route_input(struct sk_buff *skb, __be32 daddr, __be32 saddr,
dst_use(&rth->u.dst, jiffies);
RT_CACHE_STAT_INC(in_hit);
rcu_read_unlock();
- skb->rtable = rth;
+ skb_dst_set(skb, &rth->u.dst);
return 0;
}
RT_CACHE_STAT_INC(in_hlist_search);
@@ -2420,7 +2430,7 @@ static int ip_mkroute_output(struct rtable **rp,
if (err == 0) {
hash = rt_hash(oldflp->fl4_dst, oldflp->fl4_src, oldflp->oif,
rt_genid(dev_net(dev_out)));
- err = rt_intern_hash(hash, rth, rp);
+ err = rt_intern_hash(hash, rth, rp, NULL);
}
return err;
@@ -2763,7 +2773,7 @@ static int rt_fill_info(struct net *net,
struct sk_buff *skb, u32 pid, u32 seq, int event,
int nowait, unsigned int flags)
{
- struct rtable *rt = skb->rtable;
+ struct rtable *rt = skb_rtable(skb);
struct rtmsg *r;
struct nlmsghdr *nlh;
long expires;
@@ -2907,7 +2917,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
err = ip_route_input(skb, dst, src, rtm->rtm_tos, dev);
local_bh_enable();
- rt = skb->rtable;
+ rt = skb_rtable(skb);
if (err == 0 && rt->u.dst.error)
err = -rt->u.dst.error;
} else {
@@ -2927,7 +2937,7 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void
if (err)
goto errout_free;
- skb->rtable = rt;
+ skb_dst_set(skb, &rt->u.dst);
if (rtm->rtm_flags & RTM_F_NOTIFY)
rt->rt_flags |= RTCF_NOTIFY;
@@ -2968,15 +2978,15 @@ int ip_rt_dump(struct sk_buff *skb, struct netlink_callback *cb)
continue;
if (rt_is_expired(rt))
continue;
- skb->dst = dst_clone(&rt->u.dst);
+ skb_dst_set(skb, dst_clone(&rt->u.dst));
if (rt_fill_info(net, skb, NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq, RTM_NEWROUTE,
1, NLM_F_MULTI) <= 0) {
- dst_release(xchg(&skb->dst, NULL));
+ skb_dst_drop(skb);
rcu_read_unlock_bh();
goto done;
}
- dst_release(xchg(&skb->dst, NULL));
+ skb_dst_drop(skb);
}
rcu_read_unlock_bh();
}
@@ -3390,6 +3400,8 @@ int __init ip_rt_init(void)
/* All the timers, started at system startup tend
to synchronize. Perturb it a bit.
*/
+ INIT_DELAYED_WORK_DEFERRABLE(&expires_work, rt_worker_func);
+ expires_ljiffies = jiffies;
schedule_delayed_work(&expires_work,
net_random() % ip_rt_gc_interval + ip_rt_gc_interval);
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-28 09:49:57 +0000