Hello.
In article <[EMAIL PROTECTED]> (at Thu, 23 Feb 2006 17:10:18 -0800 (PST)),
"David S. Miller" <[EMAIL PROTECTED]> says:
> From: YOSHIFUJI Hideaki <[EMAIL PROTECTED]>
> Date: Fri, 24 Feb 2006 00:23:51 +0900 (JST)
>
> > David, please apply. Thank you.
>
> Can you please resend the patch with a full changelog
> entry and Signed-off-by lines for me? Thank you.
>
> This is for net-2.6 right? Or net-2.6.17?
Here it is. I think net-2.6 is fine. Thanks.
---
2.6.x have ignored IPV6_MTU socket option, which control per-socket
Path MTU. This patch, for net-2.6, implements that.
Based on patch by Hoerdt Mickael <[EMAIL PROTECTED]>.
Signed-off-by: YOSHIFUJI Hideaki <[EMAIL PROTECTED]>
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index efa3e72..f999edd 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -494,6 +494,7 @@ static int ip6_fragment(struct sk_buff *
struct net_device *dev;
struct sk_buff *frag;
struct rt6_info *rt = (struct rt6_info*)skb->dst;
+ struct ipv6_pinfo *np = skb->sk ? inet6_sk(skb->sk) : NULL;
struct ipv6hdr *tmp_hdr;
struct frag_hdr *fh;
unsigned int mtu, hlen, left, len;
@@ -505,7 +506,12 @@ static int ip6_fragment(struct sk_buff *
hlen = ip6_find_1stfragopt(skb, &prevhdr);
nexthdr = *prevhdr;
- mtu = dst_mtu(&rt->u.dst) - hlen - sizeof(struct frag_hdr);
+ mtu = dst_mtu(&rt->u.dst);
+ if (np && np->frag_size < mtu) {
+ if (np->frag_size)
+ mtu = np->frag_size;
+ }
+ mtu -= hlen + sizeof(struct frag_hdr);
if (skb_shinfo(skb)->frag_list) {
int first_len = skb_pagelen(skb);
@@ -882,7 +888,12 @@ int ip6_append_data(struct sock *sk, int
inet->cork.fl = *fl;
np->cork.hop_limit = hlimit;
np->cork.tclass = tclass;
- inet->cork.fragsize = mtu = dst_mtu(rt->u.dst.path);
+ mtu = dst_mtu(rt->u.dst.path);
+ if (np && np->frag_size < mtu) {
+ if (np->frag_size)
+ mtu = np->frag_size;
+ }
+ inet->cork.fragsize = mtu;
if (dst_allfrag(rt->u.dst.path))
inet->cork.flags |= IPCORK_ALLFRAG;
inet->cork.length = 0;
--
YOSHIFUJI Hideaki @ USAGI Project <[EMAIL PROTECTED]>
GPG-FP : 9022 65EB 1ECF 3AD1 0BDF 80D8 4807 F894 E062 0EEA
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