diff options
| author | David S. Miller <davem@davemloft.net> | 2012-07-10 14:58:16 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-11 09:40:11 +0400 |
| commit | 1d861aa4b3fb08822055345f480850205ffe6170 (patch) | |
| tree | 072c23dcde7766274464c75e51e820649301ad82 /net/ipv6 | |
| parent | 16d1839907e695387654901995f9286b65fbbc6a (diff) | |
| download | linux-1d861aa4b3fb08822055345f480850205ffe6170.tar.xz | |
inet: Minimize use of cached route inetpeer.
Only use it in the absolutely required cases:
1) COW'ing metrics
2) ipv4 PMTU
3) ipv4 redirects
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/icmp.c | 4 | ||||
| -rw-r--r-- | net/ipv6/ip6_output.c | 10 | ||||
| -rw-r--r-- | net/ipv6/ndisc.c | 8 |
3 files changed, 17 insertions, 5 deletions
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index c7da1422cbde..a113f7d7e938 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -194,8 +194,10 @@ static inline bool icmpv6_xrlim_allow(struct sock *sk, u8 type, if (rt->rt6i_dst.plen < 128) tmo >>= ((128 - rt->rt6i_dst.plen)>>5); - peer = rt6_get_peer_create(rt); + peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1); res = inet_peer_xrlim_allow(peer, tmo); + if (peer) + inet_putpeer(peer); } dst_release(dst); return res; diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index c6af5963a202..5b2d63ed793e 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -466,13 +466,15 @@ int ip6_forward(struct sk_buff *skb) else target = &hdr->daddr; - peer = rt6_get_peer_create(rt); + peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1); /* Limit redirects both by destination (here) and by source (inside ndisc_send_redirect) */ if (inet_peer_xrlim_allow(peer, 1*HZ)) ndisc_send_redirect(skb, target); + if (peer) + inet_putpeer(peer); } else { int addrtype = ipv6_addr_type(&hdr->saddr); @@ -592,10 +594,14 @@ void ipv6_select_ident(struct frag_hdr *fhdr, struct rt6_info *rt) int old, new; if (rt && !(rt->dst.flags & DST_NOPEER)) { - struct inet_peer *peer = rt6_get_peer_create(rt); + struct inet_peer *peer; + struct net *net; + net = dev_net(rt->dst.dev); + peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1); if (peer) { fhdr->identification = htonl(inet_getid(peer, 0)); + inet_putpeer(peer); return; } } diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c index 69a6330dea91..0fddd571400d 100644 --- a/net/ipv6/ndisc.c +++ b/net/ipv6/ndisc.c @@ -1486,6 +1486,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target) int rd_len; int err; u8 ha_buf[MAX_ADDR_LEN], *ha = NULL; + bool ret; if (ipv6_get_lladdr(dev, &saddr_buf, IFA_F_TENTATIVE)) { ND_PRINTK(2, warn, "Redirect: no link-local address on %s\n", @@ -1519,8 +1520,11 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target) "Redirect: destination is not a neighbour\n"); goto release; } - peer = rt6_get_peer_create(rt); - if (!inet_peer_xrlim_allow(peer, 1*HZ)) + peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1); + ret = inet_peer_xrlim_allow(peer, 1*HZ); + if (peer) + inet_putpeer(peer); + if (!ret) goto release; if (dev->addr_len) { |