For the common sequence "skb->h.raw - skb->nh.raw", similar to skb->mac_len,
that is precalculated tho, don't think we need to bloat skb with one more
member, so just use this new helper, reducing the number of non-skbuff.h
references to the layer headers even more.
Signed-off-by: Arnaldo Carvalho de Melo <[EMAIL PROTECTED]>
---
drivers/net/gianfar.c | 2 +-
drivers/net/pasemi_mac.c | 4 ++--
include/linux/skbuff.h | 5 +++++
net/core/skbuff.c | 2 +-
net/ipv4/ip_output.c | 2 +-
net/ipv6/esp6.c | 3 +--
net/ipv6/exthdrs.c | 8 ++++----
net/ipv6/ip6_input.c | 2 +-
net/ipv6/ip6_output.c | 4 ++--
net/ipv6/mcast.c | 2 +-
net/ipv6/netfilter/nf_conntrack_reasm.c | 2 +-
net/ipv6/raw.c | 2 +-
net/ipv6/reassembly.c | 8 +++++---
net/ipv6/xfrm6_policy.c | 2 +-
14 files changed, 27 insertions(+), 21 deletions(-)
From b6564bd274bbce72ae5d4d1b892c4a0385ab204a Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <[EMAIL PROTECTED]>
Date: Fri, 16 Mar 2007 17:26:39 -0300
Subject: [PATCH 2/4] [SK_BUFF]: Introduce skb_network_header_len
For the common sequence "skb->h.raw - skb->nh.raw", similar to skb->mac_len,
that is precalculated tho, don't think we need to bloat skb with one more
member, so just use this new helper, reducing the number of non-skbuff.h
references to the layer headers even more.
Signed-off-by: Arnaldo Carvalho de Melo <[EMAIL PROTECTED]>
---
drivers/net/gianfar.c | 2 +-
drivers/net/pasemi_mac.c | 4 ++--
include/linux/skbuff.h | 5 +++++
net/core/skbuff.c | 2 +-
net/ipv4/ip_output.c | 2 +-
net/ipv6/esp6.c | 3 +--
net/ipv6/exthdrs.c | 8 ++++----
net/ipv6/ip6_input.c | 2 +-
net/ipv6/ip6_output.c | 4 ++--
net/ipv6/mcast.c | 2 +-
net/ipv6/netfilter/nf_conntrack_reasm.c | 2 +-
net/ipv6/raw.c | 2 +-
net/ipv6/reassembly.c | 8 +++++---
net/ipv6/xfrm6_policy.c | 2 +-
14 files changed, 27 insertions(+), 21 deletions(-)
diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index b9f4460..b666a0c 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -953,7 +953,7 @@ static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
* l4os is the distance between the start of the
* l3 hdr and the l4 hdr */
fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
- fcb->l4os = (u16)(skb->h.raw - skb->nh.raw);
+ fcb->l4os = skb_network_header_len(skb);
fcb->flags = flags;
}
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 1d81299..76fe9dd 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -734,12 +734,12 @@ static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev)
switch (ip_hdr(skb)->protocol) {
case IPPROTO_TCP:
dflags |= XCT_MACTX_CSUM_TCP;
- dflags |= XCT_MACTX_IPH((skb->h.raw - skb->nh.raw) >> 2);
+ dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
dflags |= XCT_MACTX_IPO(nh - skb->data);
break;
case IPPROTO_UDP:
dflags |= XCT_MACTX_CSUM_UDP;
- dflags |= XCT_MACTX_IPH((skb->h.raw - skb->nh.raw) >> 2);
+ dflags |= XCT_MACTX_IPH(skb_network_header_len(skb) >> 2);
dflags |= XCT_MACTX_IPO(nh - skb->data);
break;
}
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index a8b2110..e49a5ce 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -990,6 +990,11 @@ static inline int skb_network_offset(const struct sk_buff *skb)
return skb->nh.raw - skb->data;
}
+static inline u32 skb_network_header_len(const struct sk_buff *skb)
+{
+ return skb->h.raw - skb->nh.raw;
+}
+
static inline unsigned char *skb_mac_header(const struct sk_buff *skb)
{
return skb->mac.raw;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 100fb2f..39ba583 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1960,7 +1960,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int features)
skb_reserve(nskb, headroom);
skb_reset_mac_header(nskb);
skb_set_network_header(nskb, skb->mac_len);
- nskb->h.raw = nskb->nh.raw + (skb->h.raw - skb->nh.raw);
+ nskb->h.raw = nskb->nh.raw + skb_network_header_len(skb);
memcpy(skb_put(nskb, doffset), skb->data, doffset);
if (!sg) {
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 11a6ac7..02988fb 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1187,7 +1187,7 @@ int ip_push_pending_frames(struct sock *sk)
if (skb->data < skb_network_header(skb))
__skb_pull(skb, skb_network_offset(skb));
while ((tmp_skb = __skb_dequeue(&sk->sk_write_queue)) != NULL) {
- __skb_pull(tmp_skb, skb->h.raw - skb->nh.raw);
+ __skb_pull(tmp_skb, skb_network_header_len(skb));
*tail_skb = tmp_skb;
tail_skb = &(tmp_skb->next);
skb->len += tmp_skb->len;
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 436eb9e..7fdf84d 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -147,8 +147,7 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
int blksize = ALIGN(crypto_blkcipher_blocksize(tfm), 4);
int alen = esp->auth.icv_trunc_len;
int elen = skb->len - sizeof(struct ipv6_esp_hdr) - esp->conf.ivlen - alen;
-
- int hdr_len = skb->h.raw - skb->nh.raw;
+ int hdr_len = skb_network_header_len(skb);
int nfrags;
int ret = 0;
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index ac64555..d6bce53 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -143,7 +143,7 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
struct sk_buff *skb = *skbp;
struct tlvtype_proc *curr;
const unsigned char *nh = skb_network_header(skb);
- int off = skb->h.raw - skb->nh.raw;
+ int off = skb_network_header_len(skb);
int len = (skb_transport_header(skb)[1] + 1) << 3;
if (skb_transport_offset(skb) + len > skb_headlen(skb))
@@ -297,7 +297,7 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
return -1;
}
- opt->lastopt = opt->dst1 = skb->h.raw - skb->nh.raw;
+ opt->lastopt = opt->dst1 = skb_network_header_len(skb);
#ifdef CONFIG_IPV6_MIP6
dstbuf = opt->dst1;
#endif
@@ -409,7 +409,7 @@ looped_back:
break;
}
- opt->lastopt = opt->srcrt = skb->h.raw - skb->nh.raw;
+ opt->lastopt = opt->srcrt = skb_network_header_len(skb);
skb->h.raw += (hdr->hdrlen + 1) << 3;
opt->dst0 = opt->dst1;
opt->dst1 = 0;
@@ -710,7 +710,7 @@ int ipv6_parse_hopopts(struct sk_buff **skbp)
/*
* skb_network_header(skb) is equal to skb->data, and
- * skb->h.raw - skb->nh.raw is always equal to
+ * skb_network_header_len(skb) is always equal to
* sizeof(struct ipv6hdr) by definition of
* hop-by-hop options.
*/
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 9a29dab..48689dc 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -182,7 +182,7 @@ resubmit:
nf_reset(skb);
skb_postpull_rcsum(skb, skb_network_header(skb),
- skb->h.raw - skb->nh.raw);
+ skb_network_header_len(skb));
hdr = ipv6_hdr(skb);
if (ipv6_addr_is_multicast(&hdr->daddr) &&
!ipv6_chk_mcast_addr(skb->dev, &hdr->daddr,
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 32e8c3f..57a3260 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1325,7 +1325,7 @@ int ip6_push_pending_frames(struct sock *sk)
if (skb->data < skb_network_header(skb))
__skb_pull(skb, skb_network_offset(skb));
while ((tmp_skb = __skb_dequeue(&sk->sk_write_queue)) != NULL) {
- __skb_pull(tmp_skb, skb->h.raw - skb->nh.raw);
+ __skb_pull(tmp_skb, skb_network_header_len(skb));
*tail_skb = tmp_skb;
tail_skb = &(tmp_skb->next);
skb->len += tmp_skb->len;
@@ -1337,7 +1337,7 @@ int ip6_push_pending_frames(struct sock *sk)
}
ipv6_addr_copy(final_dst, &fl->fl6_dst);
- __skb_pull(skb, skb->h.raw - skb->nh.raw);
+ __skb_pull(skb, skb_network_header_len(skb));
if (opt && opt->opt_flen)
ipv6_push_frag_opts(skb, opt, &proto);
if (opt && opt->opt_nflen)
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 07e86eb..4c45bcc 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1168,7 +1168,7 @@ int igmp6_event_query(struct sk_buff *skb)
/* compute payload length excluding extension headers */
len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
- len -= skb->h.raw - skb->nh.raw;
+ len -= skb_network_header_len(skb);
/* Drop queries with not link local source */
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL))
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 84ce5b3..490e7e1 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -657,7 +657,7 @@ nf_ct_frag6_reasm(struct nf_ct_frag6_queue *fq, struct net_device *dev)
/* Yes, and fold redundant checksum back. 8) */
if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_partial(skb_network_header(head),
- head->h.raw - head->nh.raw,
+ skb_network_header_len(head),
head->csum);
fq->fragments = NULL;
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 6fc2f4b..bca1d0f 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -362,7 +362,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
if (skb->ip_summed == CHECKSUM_COMPLETE) {
skb_postpull_rcsum(skb, skb_network_header(skb),
- skb->h.raw - skb->nh.raw);
+ skb_network_header_len(skb));
if (!csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
&ipv6_hdr(skb)->daddr,
skb->len, inet->num, skb->csum))
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 31d4271..6dfacfa 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -679,7 +679,7 @@ static int ip6_frag_reasm(struct frag_queue *fq, struct sk_buff **skb_in,
/* Yes, and fold redundant checksum back. 8) */
if (head->ip_summed == CHECKSUM_COMPLETE)
head->csum = csum_partial(skb_network_header(head),
- head->h.raw - head->nh.raw,
+ skb_network_header_len(head),
head->csum);
rcu_read_lock();
@@ -715,13 +715,15 @@ static int ipv6_frag_rcv(struct sk_buff **skbp)
/* Jumbo payload inhibits frag. header */
if (hdr->payload_len==0) {
IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
- icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb->h.raw-skb->nh.raw);
+ icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
+ skb_network_header_len(skb));
return -1;
}
if (!pskb_may_pull(skb, (skb_transport_offset(skb) +
sizeof(struct frag_hdr)))) {
IP6_INC_STATS(ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
- icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb->h.raw-skb->nh.raw);
+ icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
+ skb_network_header_len(skb));
return -1;
}
diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index b93bfb8..ef746d4 100644
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -270,7 +270,7 @@ error:
static inline void
_decode_session6(struct sk_buff *skb, struct flowi *fl)
{
- u16 offset = skb->h.raw - skb->nh.raw;
+ u16 offset = skb_network_header_len(skb);
struct ipv6hdr *hdr = ipv6_hdr(skb);
struct ipv6_opt_hdr *exthdr;
const unsigned char *nh = skb_network_header(skb);
--
1.5.0.3
