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[TCP]: Introduce tcp_hdrlen() and tcp_optlen() 

The ip_hdrlen() buddy, created to reduce the number of skb->h.th-> uses and to
avoid the longer, open coded equivalent.

Ditched a no-op in bnx2 in the process.

I wonder if we should have a BUG_ON(skb->h.th->doff < 5) in tcp_optlen()...

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-03-18 17:43:48 -07:00 committed by David S. Miller
parent 88c7664f13
commit ab6a5bb6b2
14 changed files with 32 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/net/atl1/atl1_main.c
View File

@ -1307,7 +1307,7 @@ static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
tso->tsopl |= (iph->ihl &
CSUM_PARAM_IPHL_MASK) << CSUM_PARAM_IPHL_SHIFT;
tso->tsopl |= ((skb->h.th->doff << 2) &
tso->tsopl |= (tcp_hdrlen(skb) &
TSO_PARAM_TCPHDRLEN_MASK) << TSO_PARAM_TCPHDRLEN_SHIFT;
tso->tsopl |= (skb_shinfo(skb)->gso_size &
TSO_PARAM_MSS_MASK) << TSO_PARAM_MSS_SHIFT;
@ -1369,8 +1369,7 @@ static void atl1_tx_map(struct atl1_adapter *adapter,
if (tcp_seg) {
/* TSO/GSO */
proto_hdr_len = (skb_transport_offset(skb) +
(skb->h.th->doff << 2));
proto_hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
buffer_info->length = proto_hdr_len;
page = virt_to_page(skb->data);
offset = (unsigned long)skb->data & ~PAGE_MASK;
@ -1563,7 +1562,7 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
if (mss) {
if (skb->protocol == htons(ETH_P_IP)) {
proto_hdr_len = (skb_transport_offset(skb) +
(skb->h.th->doff << 2));
tcp_hdrlen(skb));
if (unlikely(proto_hdr_len > len)) {
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;

7
drivers/net/bnx2.c
View File

@ -4521,13 +4521,12 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK;
}
tcp_opt_len = ((skb->h.th->doff - 5) * 4);
vlan_tag_flags |= TX_BD_FLAGS_SW_LSO;
tcp_opt_len = 0;
if (skb->h.th->doff > 5) {
tcp_opt_len = (skb->h.th->doff - 5) << 2;
}
if (skb->h.th->doff > 5)
tcp_opt_len = tcp_optlen(skb);
ip_tcp_len = ip_hdrlen(skb) + sizeof(struct tcphdr);
iph = ip_hdr(skb);

4
drivers/net/e1000/e1000_main.c
View File

@ -2887,7 +2887,7 @@ e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
return err;
}
hdr_len = (skb_transport_offset(skb) + (skb->h.th->doff << 2));
hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
mss = skb_shinfo(skb)->gso_size;
if (skb->protocol == htons(ETH_P_IP)) {
struct iphdr *iph = ip_hdr(skb);
@ -3292,7 +3292,7 @@ e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
/* TSO Workaround for 82571/2/3 Controllers -- if skb->data
* points to just header, pull a few bytes of payload from
* frags into skb->data */
hdr_len = (skb_transport_offset(skb) + (skb->h.th->doff << 2));
hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
switch (adapter->hw.mac_type) {
unsigned int pull_size;

2
drivers/net/ehea/ehea_main.c
View File

@ -1300,7 +1300,7 @@ static void write_swqe2_TSO(struct sk_buff *skb,
/* copy only eth/ip/tcp headers to immediate data and
* the rest of skb->data to sg1entry
*/
headersize = ETH_HLEN + ip_hdrlen(skb) + (skb->h.th->doff * 4);
headersize = ETH_HLEN + ip_hdrlen(skb) + tcp_hdrlen(skb);
skb_data_size = skb->len - skb->data_len;

2
drivers/net/ixgb/ixgb_main.c
View File

@ -1190,7 +1190,7 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
return err;
}
hdr_len = (skb_transport_offset(skb) + (skb->h.th->doff << 2));
hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
mss = skb_shinfo(skb)->gso_size;
iph = ip_hdr(skb);
iph->tot_len = 0;

3
drivers/net/myri10ge/myri10ge.c
View File

@ -2054,8 +2054,7 @@ again:
* send loop that we are still in the
* header portion of the TSO packet.
* TSO header must be at most 134 bytes long */
cum_len = -(skb_transport_offset(skb) +
(skb->h.th->doff << 2));
cum_len = -(skb_transport_offset(skb) + tcp_hdrlen(skb));
/* for TSO, pseudo_hdr_offset holds mss.
* The firmware figures out where to put

3
drivers/net/netxen/netxen_nic_hw.c
View File

@ -374,8 +374,7 @@ void netxen_tso_check(struct netxen_adapter *adapter,
{
if (desc->mss) {
desc->total_hdr_length = (sizeof(struct ethhdr) +
ip_hdrlen(skb) +
skb->h.th->doff * 4);
ip_hdrlen(skb) + tcp_hdrlen(skb));
netxen_set_cmd_desc_opcode(desc, TX_TCP_LSO);
} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
if (ip_hdr(skb)->protocol == IPPROTO_TCP) {

2
drivers/net/netxen/netxen_nic_main.c
View File

@ -779,7 +779,7 @@ static int netxen_nic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
if (skb_shinfo(skb)->gso_size > 0) {
no_of_desc++;
if ((ip_hdrlen(skb) + skb->h.th->doff * 4 +
if ((ip_hdrlen(skb) + tcp_hdrlen(skb) +
sizeof(struct ethhdr)) >
(sizeof(struct cmd_desc_type0) - 2)) {
no_of_desc++;

2
drivers/net/sky2.c
View File

@ -1392,7 +1392,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
/* Check for TCP Segmentation Offload */
mss = skb_shinfo(skb)->gso_size;
if (mss != 0) {
mss += ((skb->h.th->doff - 5) * 4); /* TCP options */
mss += tcp_optlen(skb); /* TCP options */
mss += ip_hdrlen(skb) + sizeof(struct tcphdr);
mss += ETH_HLEN;

4
drivers/net/tg3.c
View File

@ -3911,7 +3911,7 @@ static int tg3_start_xmit(struct sk_buff *skb, struct net_device *dev)
else {
struct iphdr *iph = ip_hdr(skb);
tcp_opt_len = ((skb->h.th->doff - 5) * 4);
tcp_opt_len = tcp_optlen(skb);
ip_tcp_len = ip_hdrlen(skb) + sizeof(struct tcphdr);
iph->check = 0;
@ -4065,7 +4065,7 @@ static int tg3_start_xmit_dma_bug(struct sk_buff *skb, struct net_device *dev)
goto out_unlock;
}
tcp_opt_len = ((skb->h.th->doff - 5) * 4);
tcp_opt_len = tcp_optlen(skb);
ip_tcp_len = ip_hdrlen(skb) + sizeof(struct tcphdr);
hdr_len = ip_tcp_len + tcp_opt_len;

8
drivers/s390/net/qeth_eddp.c
View File

@ -477,13 +477,13 @@ qeth_eddp_fill_context_tcp(struct qeth_eddp_context *ctx,
skb_network_header(skb),
ip_hdrlen(skb),
skb->h.raw,
skb->h.th->doff * 4);
tcp_hdrlen(skb));
else
eddp = qeth_eddp_create_eddp_data(qhdr,
skb_network_header(skb),
sizeof(struct ipv6hdr),
skb->h.raw,
skb->h.th->doff * 4);
tcp_hdrlen(skb));
if (eddp == NULL) {
QETH_DBF_TEXT(trace, 2, "eddpfcnm");
@ -596,11 +596,11 @@ qeth_eddp_create_context_tcp(struct qeth_card *card, struct sk_buff *skb,
ctx = qeth_eddp_create_context_generic(card, skb,
(sizeof(struct qeth_hdr) +
ip_hdrlen(skb) +
skb->h.th->doff * 4));
tcp_hdrlen(skb)));
else if (skb->protocol == htons(ETH_P_IPV6))
ctx = qeth_eddp_create_context_generic(card, skb,
sizeof(struct qeth_hdr) + sizeof(struct ipv6hdr) +
skb->h.th->doff*4);
tcp_hdrlen(skb));
else
QETH_DBF_TEXT(trace, 2, "cetcpinv");

10
include/linux/tcp.h
View File

@ -178,6 +178,16 @@ struct tcp_md5sig {
#include <net/inet_connection_sock.h>
#include <net/inet_timewait_sock.h>
static inline unsigned int tcp_hdrlen(const struct sk_buff *skb)
{
return skb->h.th->doff * 4;
}
static inline unsigned int tcp_optlen(const struct sk_buff *skb)
{
return (skb->h.th->doff - 5) * 4;
}
/* This defines a selective acknowledgement block. */
struct tcp_sack_block_wire {
__be32 start_seq;

2
net/ipv4/tcp_ipv4.c
View File

@ -1564,7 +1564,7 @@ int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
}
if (skb->len < (skb->h.th->doff << 2) || tcp_checksum_complete(skb))
if (skb->len < tcp_hdrlen(skb) || tcp_checksum_complete(skb))
goto csum_err;
if (sk->sk_state == TCP_LISTEN) {

2
net/ipv6/tcp_ipv6.c
View File

@ -1609,7 +1609,7 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
return 0;
}
if (skb->len < (skb->h.th->doff<<2) || tcp_checksum_complete(skb))
if (skb->len < tcp_hdrlen(skb) || tcp_checksum_complete(skb))
goto csum_err;
if (sk->sk_state == TCP_LISTEN) {