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Message-Id: <11769449823097-git-send-email-jheffner@psc.edu>
Date: Wed, 18 Apr 2007 21:09:39 -0400
From: John Heffner <jheffner@....edu>
To: David Miller <davem@...emloft.net>
Cc: Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org,
John Heffner <jheffner@....edu>
Subject: [PATCH 1/4] Revert "[NET] Add IP(V6)_PMTUDISC_RPOBE"
This reverts commit d21d2a90b879c0cf159df5944847e6d9833816eb.
Must be backed out because commit 87e927a0583bd4a8ba9e97cd75b58d8aa1c76e37
does not work.
Signed-off-by: John Heffner <jheffner@....edu>
---
include/linux/in.h | 1 -
include/linux/in6.h | 1 -
include/linux/skbuff.h | 3 +--
include/net/ip.h | 2 +-
net/core/skbuff.c | 2 --
net/ipv4/ip_output.c | 14 ++++----------
net/ipv4/ip_sockglue.c | 2 +-
net/ipv4/raw.c | 3 ---
net/ipv6/ip6_output.c | 12 ++++--------
net/ipv6/ipv6_sockglue.c | 2 +-
net/ipv6/raw.c | 3 ---
11 files changed, 12 insertions(+), 33 deletions(-)
diff --git a/include/linux/in.h b/include/linux/in.h
index 2dc1f8a..1912e7c 100644
--- a/include/linux/in.h
+++ b/include/linux/in.h
@@ -83,7 +83,6 @@ struct in_addr {
#define IP_PMTUDISC_DONT 0 /* Never send DF frames */
#define IP_PMTUDISC_WANT 1 /* Use per route hints */
#define IP_PMTUDISC_DO 2 /* Always DF */
-#define IP_PMTUDISC_PROBE 3 /* Ignore dst pmtu */
#define IP_MULTICAST_IF 32
#define IP_MULTICAST_TTL 33
diff --git a/include/linux/in6.h b/include/linux/in6.h
index d559fac..4e8350a 100644
--- a/include/linux/in6.h
+++ b/include/linux/in6.h
@@ -179,7 +179,6 @@ struct in6_flowlabel_req
#define IPV6_PMTUDISC_DONT 0
#define IPV6_PMTUDISC_WANT 1
#define IPV6_PMTUDISC_DO 2
-#define IPV6_PMTUDISC_PROBE 3
/* Flowlabel */
#define IPV6_FLOWLABEL_MGR 32
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 8bf9b9f..7f17cfc 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -277,8 +277,7 @@ struct sk_buff {
nfctinfo:3;
__u8 pkt_type:3,
fclone:2,
- ipvs_property:1,
- ign_dst_mtu:1;
+ ipvs_property:1;
__be16 protocol;
void (*destructor)(struct sk_buff *skb);
diff --git a/include/net/ip.h b/include/net/ip.h
index 6a08b65..75f226d 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -206,7 +206,7 @@ int ip_decrease_ttl(struct iphdr *iph)
static inline
int ip_dont_fragment(struct sock *sk, struct dst_entry *dst)
{
- return (inet_sk(sk)->pmtudisc >= IP_PMTUDISC_DO ||
+ return (inet_sk(sk)->pmtudisc == IP_PMTUDISC_DO ||
(inet_sk(sk)->pmtudisc == IP_PMTUDISC_WANT &&
!(dst_metric(dst, RTAX_LOCK)&(1<<RTAX_MTU))));
}
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 2391cdf..f0d986a 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -479,7 +479,6 @@ struct sk_buff *skb_clone(struct sk_buff *skb, gfp_t gfp_mask)
#if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
C(ipvs_property);
#endif
- C(ign_dst_mtu);
C(protocol);
n->destructor = NULL;
C(mark);
@@ -543,7 +542,6 @@ static void copy_skb_header(struct sk_buff *new, const struct sk_buff *old)
#if defined(CONFIG_IP_VS) || defined(CONFIG_IP_VS_MODULE)
new->ipvs_property = old->ipvs_property;
#endif
- new->ign_dst_mtu = old->ign_dst_mtu;
#ifdef CONFIG_NET_SCHED
#ifdef CONFIG_NET_CLS_ACT
new->tc_verd = old->tc_verd;
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 704bc44..79e71ee 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -198,8 +198,7 @@ static inline int ip_finish_output(struct sk_buff *skb)
return dst_output(skb);
}
#endif
- if (skb->len > dst_mtu(skb->dst) &&
- !skb->ign_dst_mtu && !skb_is_gso(skb))
+ if (skb->len > dst_mtu(skb->dst) && !skb_is_gso(skb))
return ip_fragment(skb, ip_finish_output2);
else
return ip_finish_output2(skb);
@@ -788,9 +787,7 @@ int ip_append_data(struct sock *sk,
inet->cork.addr = ipc->addr;
}
dst_hold(&rt->u.dst);
- inet->cork.fragsize = mtu = inet->pmtudisc == IP_PMTUDISC_PROBE ?
- rt->u.dst.dev->mtu :
- dst_mtu(rt->u.dst.path);
+ inet->cork.fragsize = mtu = dst_mtu(rt->u.dst.path);
inet->cork.rt = rt;
inet->cork.length = 0;
sk->sk_sndmsg_page = NULL;
@@ -1208,16 +1205,13 @@ int ip_push_pending_frames(struct sock *sk)
* to fragment the frame generated here. No matter, what transforms
* how transforms change size of the packet, it will come out.
*/
- if (inet->pmtudisc < IP_PMTUDISC_DO)
+ if (inet->pmtudisc != IP_PMTUDISC_DO)
skb->local_df = 1;
- if (inet->pmtudisc == IP_PMTUDISC_PROBE)
- skb->ign_dst_mtu = 1;
-
/* DF bit is set when we want to see DF on outgoing frames.
* If local_df is set too, we still allow to fragment this frame
* locally. */
- if (inet->pmtudisc >= IP_PMTUDISC_DO ||
+ if (inet->pmtudisc == IP_PMTUDISC_DO ||
(skb->len <= dst_mtu(&rt->u.dst) &&
ip_dont_fragment(sk, &rt->u.dst)))
df = htons(IP_DF);
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 4d54457..c199d23 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -542,7 +542,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
inet->hdrincl = val ? 1 : 0;
break;
case IP_MTU_DISCOVER:
- if (val<0 || val>3)
+ if (val<0 || val>2)
goto e_inval;
inet->pmtudisc = val;
break;
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index addb786..c60aadf 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -304,9 +304,6 @@ static int raw_send_hdrinc(struct sock *sk, void *from, size_t length,
if (err)
goto error_fault;
- if (inet->pmtudisc == IP_PMTUDISC_PROBE)
- skb->ign_dst_mtu = 1;
-
/* We don't modify invalid header */
if (length >= sizeof(*iph) && iph->ihl * 4U <= length) {
if (!iph->saddr)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 78317a4..b8e307a 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -139,8 +139,8 @@ static int ip6_output2(struct sk_buff *skb)
int ip6_output(struct sk_buff *skb)
{
- if ((skb->len > dst_mtu(skb->dst) && !skb->ign_dst_mtu &&
- !skb_is_gso(skb)) || dst_allfrag(skb->dst))
+ if ((skb->len > dst_mtu(skb->dst) && !skb_is_gso(skb)) ||
+ dst_allfrag(skb->dst))
return ip6_fragment(skb, ip6_output2);
else
return ip6_output2(skb);
@@ -566,7 +566,7 @@ static int ip6_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
hlen = ip6_find_1stfragopt(skb, &prevhdr);
nexthdr = *prevhdr;
- mtu = skb->ign_dst_mtu ? skb->len : dst_mtu(&rt->u.dst);
+ mtu = dst_mtu(&rt->u.dst);
if (np && np->frag_size < mtu) {
if (np->frag_size)
mtu = np->frag_size;
@@ -1050,8 +1050,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
inet->cork.fl = *fl;
np->cork.hop_limit = hlimit;
np->cork.tclass = tclass;
- mtu = np->pmtudisc == IPV6_PMTUDISC_PROBE ?
- rt->u.dst.dev->mtu : dst_mtu(rt->u.dst.path);
+ mtu = dst_mtu(rt->u.dst.path);
if (np->frag_size < mtu) {
if (np->frag_size)
mtu = np->frag_size;
@@ -1339,9 +1338,6 @@ int ip6_push_pending_frames(struct sock *sk)
tmp_skb->sk = NULL;
}
- if (np->pmtudisc == IPV6_PMTUDISC_PROBE)
- skb->ign_dst_mtu = 1;
-
ipv6_addr_copy(final_dst, &fl->fl6_dst);
__skb_pull(skb, skb_network_header_len(skb));
if (opt && opt->opt_flen)
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index aa3d07c..da930fa 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -694,7 +694,7 @@ done:
retv = ip6_ra_control(sk, val, NULL);
break;
case IPV6_MTU_DISCOVER:
- if (val<0 || val>3)
+ if (val<0 || val>2)
goto e_inval;
np->pmtudisc = val;
retv = 0;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 86c9943..f4cd90b 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -591,9 +591,6 @@ static int rawv6_send_hdrinc(struct sock *sk, void *from, int length,
if (err)
goto error_fault;
- if (np->pmtudisc == IPV6_PMTUDISC_PROBE)
- skb->ign_dst_mtu = 1;
-
IP6_INC_STATS(rt->rt6i_idev, IPSTATS_MIB_OUTREQUESTS);
err = NF_HOOK(PF_INET6, NF_IP6_LOCAL_OUT, skb, NULL, rt->u.dst.dev,
dst_output);
--
1.5.1.rc3.30.ga8f4-dirty
-
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