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authorHerbert Xu <herbert@gondor.apana.org.au>2007-11-13 21:33:32 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-28 14:53:37 -0800
commitb4ce92775c2e7ff9cf79cca4e0a19c8c5fd6287b (patch)
treec057ff62b03582493b74005f7959a0207e748468
parent[IPSEC]: Use dst->header_len when resizing on output (diff)
downloadlinux-dev-b4ce92775c2e7ff9cf79cca4e0a19c8c5fd6287b.tar.xz
linux-dev-b4ce92775c2e7ff9cf79cca4e0a19c8c5fd6287b.zip
[IPV6]: Move nfheader_len into rt6_info
The dst member nfheader_len is only used by IPv6. It's also currently creating a rather ugly alignment hole in struct dst. Therefore this patch moves it from there into struct rt6_info. It also reorders the fields in rt6_info to minimize holes. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/net/dst.h1
-rw-r--r--include/net/ip6_fib.h11
-rw-r--r--net/ipv4/xfrm4_policy.c1
-rw-r--r--net/ipv6/ip6_output.c5
-rw-r--r--net/ipv6/xfrm6_policy.c3
5 files changed, 13 insertions, 8 deletions
diff --git a/include/net/dst.h b/include/net/dst.h
index 2f65e894b829..69888f1502b1 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -50,7 +50,6 @@ struct dst_entry
unsigned long expires;
unsigned short header_len; /* more space at head required */
- unsigned short nfheader_len; /* more non-fragment space at head required */
unsigned short trailer_len; /* space to reserve at tail */
u32 metrics[RTAX_MAX];
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index 857821360bb6..4cefcffe773e 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -99,16 +99,21 @@ struct rt6_info
u32 rt6i_flags;
u32 rt6i_metric;
atomic_t rt6i_ref;
- struct fib6_table *rt6i_table;
- struct rt6key rt6i_dst;
- struct rt6key rt6i_src;
+ /* more non-fragment space at head required */
+ unsigned short nfheader_len;
u8 rt6i_protocol;
+ struct fib6_table *rt6i_table;
+
+ struct rt6key rt6i_dst;
+
#ifdef CONFIG_XFRM
u32 rt6i_flow_cache_genid;
#endif
+
+ struct rt6key rt6i_src;
};
static inline struct inet6_dev *ip6_dst_idev(struct dst_entry *dst)
diff --git a/net/ipv4/xfrm4_policy.c b/net/ipv4/xfrm4_policy.c
index cc86fb110dd8..5ee3a2f9fb27 100644
--- a/net/ipv4/xfrm4_policy.c
+++ b/net/ipv4/xfrm4_policy.c
@@ -161,7 +161,6 @@ __xfrm4_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
dst_prev->flags |= DST_HOST;
dst_prev->lastuse = jiffies;
dst_prev->header_len = header_len;
- dst_prev->nfheader_len = 0;
dst_prev->trailer_len = trailer_len;
memcpy(&dst_prev->metrics, &x->route->metrics, sizeof(dst_prev->metrics));
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 150615758fdc..387030d2483c 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1099,7 +1099,7 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
sk->sk_sndmsg_page = NULL;
sk->sk_sndmsg_off = 0;
exthdrlen = rt->u.dst.header_len + (opt ? opt->opt_flen : 0) -
- rt->u.dst.nfheader_len;
+ rt->nfheader_len;
length += exthdrlen;
transhdrlen += exthdrlen;
} else {
@@ -1114,7 +1114,8 @@ int ip6_append_data(struct sock *sk, int getfrag(void *from, char *to,
hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
- fragheaderlen = sizeof(struct ipv6hdr) + rt->u.dst.nfheader_len + (opt ? opt->opt_nflen : 0);
+ fragheaderlen = sizeof(struct ipv6hdr) + rt->nfheader_len +
+ (opt ? opt->opt_nflen : 0);
maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen - sizeof(struct frag_hdr);
if (mtu <= sizeof(struct ipv6hdr) + IPV6_MAXPLEN) {
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index 3cad3e8dc4da..5b02f0efd38e 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -157,7 +157,8 @@ __xfrm6_bundle_create(struct xfrm_policy *policy, struct xfrm_state **xfrm, int
dst_prev = dst1;
if (xfrm[i]->type->flags & XFRM_TYPE_NON_FRAGMENT)
- dst->nfheader_len += xfrm[i]->props.header_len;
+ ((struct rt6_info *)dst)->nfheader_len +=
+ xfrm[i]->props.header_len;
header_len += xfrm[i]->props.header_len;
trailer_len += xfrm[i]->props.trailer_len;