diff options
| author | David S. Miller <davem@davemloft.net> | 2011-02-05 02:55:25 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-02-05 02:59:53 +0300 |
| commit | 92d8682926342d2b6aa5b2ecc02221e00e1573a0 (patch) | |
| tree | 7f70b9cc2975716ab60ddd632b9fecf0a51b828d /net/ipv6 | |
| parent | 0131ba451e20239c5dc701027c1a2edef95e1a6e (diff) | |
| download | linux-92d8682926342d2b6aa5b2ecc02221e00e1573a0.tar.xz | |
inetpeer: Move ICMP rate limiting state into inet_peer entries.
Like metrics, the ICMP rate limiting bits are cached state about
a destination. So move it into the inet_peer entries.
If an inet_peer cannot be bound (the reason is memory allocation
failure or similar), the policy is to allow.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/icmp.c | 16 | ||||
| -rw-r--r-- | net/ipv6/ip6_output.c | 5 | ||||
| -rw-r--r-- | net/ipv6/ndisc.c | 4 |
3 files changed, 16 insertions, 9 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 03e62f94ff8e..a31d91b04c87 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -157,20 +157,20 @@ static int is_ineligible(struct sk_buff *skb) /* * Check the ICMP output rate limit */ -static inline int icmpv6_xrlim_allow(struct sock *sk, u8 type, - struct flowi *fl) +static inline bool icmpv6_xrlim_allow(struct sock *sk, u8 type, + struct flowi *fl) { struct dst_entry *dst; struct net *net = sock_net(sk); - int res = 0; + bool res = false; /* Informational messages are not limited. */ if (type & ICMPV6_INFOMSG_MASK) - return 1; + return true; /* Do not limit pmtu discovery, it would break it. */ if (type == ICMPV6_PKT_TOOBIG) - return 1; + return true; /* * Look up the output route. @@ -182,7 +182,7 @@ static inline int icmpv6_xrlim_allow(struct sock *sk, u8 type, IP6_INC_STATS(net, ip6_dst_idev(dst), IPSTATS_MIB_OUTNOROUTES); } else if (dst->dev && (dst->dev->flags&IFF_LOOPBACK)) { - res = 1; + res = true; } else { struct rt6_info *rt = (struct rt6_info *)dst; int tmo = net->ipv6.sysctl.icmpv6_time; @@ -191,7 +191,9 @@ static inline int icmpv6_xrlim_allow(struct sock *sk, u8 type, if (rt->rt6i_dst.plen < 128) tmo >>= ((128 - rt->rt6i_dst.plen)>>5); - res = xrlim_allow(dst, tmo); + if (!rt->rt6i_peer) + rt6_bind_peer(rt, 1); + res = inet_peer_xrlim_allow(rt->rt6i_peer, tmo); } dst_release(dst); return res; diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 5f8d242be3f3..2600e2288724 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -479,10 +479,13 @@ int ip6_forward(struct sk_buff *skb) else target = &hdr->daddr; + if (!rt->rt6i_peer) + rt6_bind_peer(rt, 1); + /* Limit redirects both by destination (here) and by source (inside ndisc_send_redirect) */ - if (xrlim_allow(dst, 1*HZ)) + if (inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ)) ndisc_send_redirect(skb, n, target); } else { int addrtype = ipv6_addr_type(&hdr->saddr); diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 2342545a5ee9..7254ce364006 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1553,7 +1553,9 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh, "ICMPv6 Redirect: destination is not a neighbour.\n"); goto release; } - if (!xrlim_allow(dst, 1*HZ)) + if (!rt->rt6i_peer) + rt6_bind_peer(rt, 1); + if (inet_peer_xrlim_allow(rt->rt6i_peer, 1*HZ)) goto release; if (dev->addr_len) { |