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[SK_BUFF]: Introduce skb_transport_offset() 

For the quite common 'skb->h.raw - skb->data' sequence.

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 2007-04-25 17:55:53 -07:00 committed by David S. Miller
parent badff6d01a
commit ea2ae17d64
26 changed files with 64 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/net/atl1/atl1_main.c
View File

@ -1326,8 +1326,8 @@ static int atl1_tx_csum(struct atl1_adapter *adapter, struct sk_buff *skb,
u8 css, cso;
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
cso = skb->h.raw - skb->data;
css = (skb->h.raw + skb->csum_offset) - skb->data;
cso = skb_transport_offset(skb);
css = cso + skb->csum;
if (unlikely(cso & 0x1)) {
printk(KERN_DEBUG "%s: payload offset != even number\n",
atl1_driver_name);
@ -1369,8 +1369,8 @@ static void atl1_tx_map(struct atl1_adapter *adapter,
if (tcp_seg) {
/* TSO/GSO */
proto_hdr_len =
((skb->h.raw - skb->data) + (skb->h.th->doff << 2));
proto_hdr_len = (skb_transport_offset(skb) +
(skb->h.th->doff << 2));
buffer_info->length = proto_hdr_len;
page = virt_to_page(skb->data);
offset = (unsigned long)skb->data & ~PAGE_MASK;
@ -1562,7 +1562,7 @@ static int atl1_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
mss = skb_shinfo(skb)->gso_size;
if (mss) {
if (skb->protocol == htons(ETH_P_IP)) {
proto_hdr_len = ((skb->h.raw - skb->data) +
proto_hdr_len = (skb_transport_offset(skb) +
(skb->h.th->doff << 2));
if (unlikely(proto_hdr_len > len)) {
dev_kfree_skb_any(skb);

6
drivers/net/cassini.c
View File

@ -2821,10 +2821,8 @@ static inline int cas_xmit_tx_ringN(struct cas *cp, int ring,
ctrl = 0;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
u64 csum_start_off, csum_stuff_off;
csum_start_off = (u64) (skb->h.raw - skb->data);
csum_stuff_off = csum_start_off + skb->csum_offset;
const u64 csum_start_off = skb_transport_offset(skb);
const u64 csum_stuff_off = csum_start_off + skb->csum_offset;
ctrl = TX_DESC_CSUM_EN |
CAS_BASE(TX_DESC_CSUM_START, csum_start_off) |

7
drivers/net/cxgb3/sge.c
View File

@ -1319,9 +1319,10 @@ static void write_ofld_wr(struct adapter *adap, struct sk_buff *skb,
/* Only TX_DATA builds SGLs */
from = (struct work_request_hdr *)skb->data;
memcpy(&d->flit[1], &from[1], skb->h.raw - skb->data - sizeof(*from));
memcpy(&d->flit[1], &from[1],
skb_transport_offset(skb) - sizeof(*from));
flits = (skb->h.raw - skb->data) / 8;
flits = skb_transport_offset(skb) / 8;
sgp = ndesc == 1 ? (struct sg_ent *)&d->flit[flits] : sgl;
sgl_flits = make_sgl(skb, sgp, skb->h.raw, skb->tail - skb->h.raw,
adap->pdev);
@ -1349,7 +1350,7 @@ static inline unsigned int calc_tx_descs_ofld(const struct sk_buff *skb)
if (skb->len <= WR_LEN && cnt == 0)
return 1; /* packet fits as immediate data */
flits = (skb->h.raw - skb->data) / 8; /* headers */
flits = skb_transport_offset(skb) / 8; /* headers */
if (skb->tail != skb->h.raw)
cnt++;
return flits_to_desc(flits + sgl_len(cnt));

10
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->h.raw - skb->data) + (skb->h.th->doff << 2));
hdr_len = (skb_transport_offset(skb) + (skb->h.th->doff << 2));
mss = skb_shinfo(skb)->gso_size;
if (skb->protocol == htons(ETH_P_IP)) {
struct iphdr *iph = ip_hdr(skb);
@ -2897,7 +2897,7 @@ e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
iph->daddr, 0,
IPPROTO_TCP, 0);
cmd_length = E1000_TXD_CMD_IP;
ipcse = skb->h.raw - skb->data - 1;
ipcse = skb_transport_offset(skb) - 1;
} else if (skb->protocol == htons(ETH_P_IPV6)) {
ipv6_hdr(skb)->payload_len = 0;
skb->h.th->check =
@ -2908,7 +2908,7 @@ e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
}
ipcss = skb_network_offset(skb);
ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
tucss = skb->h.raw - skb->data;
tucss = skb_transport_offset(skb);
tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
tucse = 0;
@ -2950,7 +2950,7 @@ e1000_tx_csum(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
uint8_t css;
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
css = skb->h.raw - skb->data;
css = skb_transport_offset(skb);
i = tx_ring->next_to_use;
buffer_info = &tx_ring->buffer_info[i];
@ -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->h.raw - skb->data) + (skb->h.th->doff << 2));
hdr_len = (skb_transport_offset(skb) + (skb->h.th->doff << 2));
if (skb->data_len && (hdr_len == (skb->len - skb->data_len))) {
switch (adapter->hw.mac_type) {
unsigned int pull_size;

8
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->h.raw - skb->data) + (skb->h.th->doff << 2));
hdr_len = (skb_transport_offset(skb) + (skb->h.th->doff << 2));
mss = skb_shinfo(skb)->gso_size;
iph = ip_hdr(skb);
iph->tot_len = 0;
@ -1199,8 +1199,8 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
0, IPPROTO_TCP, 0);
ipcss = skb_network_offset(skb);
ipcso = (void *)&(iph->check) - (void *)skb->data;
ipcse = skb->h.raw - skb->data - 1;
tucss = skb->h.raw - skb->data;
ipcse = skb_transport_offset(skb) - 1;
tucss = skb_transport_offset(skb);
tucso = (void *)&(skb->h.th->check) - (void *)skb->data;
tucse = 0;
@ -1245,7 +1245,7 @@ ixgb_tx_csum(struct ixgb_adapter *adapter, struct sk_buff *skb)
if(likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
struct ixgb_buffer *buffer_info;
css = skb->h.raw - skb->data;
css = skb_transport_offset(skb);
cso = css + skb->csum_offset;
i = adapter->tx_ring.next_to_use;

5
drivers/net/myri10ge/myri10ge.c
View File

@ -2029,7 +2029,7 @@ again:
odd_flag = 0;
flags = (MXGEFW_FLAGS_NO_TSO | MXGEFW_FLAGS_FIRST);
if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
cksum_offset = (skb->h.raw - skb->data);
cksum_offset = skb_transport_offset(skb);
pseudo_hdr_offset = cksum_offset + skb->csum_offset;
/* If the headers are excessively large, then we must
* fall back to a software checksum */
@ -2054,7 +2054,8 @@ 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->h.raw - skb->data) + (skb->h.th->doff << 2));
cum_len = -(skb_transport_offset(skb) +
(skb->h.th->doff << 2));
/* for TSO, pseudo_hdr_offset holds mss.
* The firmware figures out where to put

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

@ -387,7 +387,7 @@ void netxen_tso_check(struct netxen_adapter *adapter,
}
}
adapter->stats.xmitcsummed++;
desc->tcp_hdr_offset = skb->h.raw - skb->data;
desc->tcp_hdr_offset = skb_transport_offset(skb);
desc->ip_hdr_offset = skb_network_offset(skb);
}

4
drivers/net/sk98lin/skge.c
View File

@ -1562,7 +1562,7 @@ struct sk_buff *pMessage) /* pointer to send-message */
pTxd->pMBuf = pMessage;
if (pMessage->ip_summed == CHECKSUM_PARTIAL) {
u16 hdrlen = pMessage->h.raw - pMessage->data;
u16 hdrlen = skb_transport_offset(pMessage);
u16 offset = hdrlen + pMessage->csum_offset;
if ((pMessage->h.ipiph->protocol == IPPROTO_UDP ) &&
@ -1681,7 +1681,7 @@ struct sk_buff *pMessage) /* pointer to send-message */
** Does the HW need to evaluate checksum for TCP or UDP packets?
*/
if (pMessage->ip_summed == CHECKSUM_PARTIAL) {
u16 hdrlen = pMessage->h.raw - pMessage->data;
u16 hdrlen = skb_transport_offset(pMessage);
u16 offset = hdrlen + pMessage->csum_offset;
Control = BMU_STFWD;

2
drivers/net/skge.c
View File

@ -2654,7 +2654,7 @@ static int skge_xmit_frame(struct sk_buff *skb, struct net_device *dev)
td->dma_hi = map >> 32;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
int offset = skb->h.raw - skb->data;
const int offset = skb_transport_offset(skb);
/* This seems backwards, but it is what the sk98lin
* does. Looks like hardware is wrong?

2
drivers/net/sky2.c
View File

@ -1421,7 +1421,7 @@ static int sky2_xmit_frame(struct sk_buff *skb, struct net_device *dev)
/* Handle TCP checksum offload */
if (skb->ip_summed == CHECKSUM_PARTIAL) {
unsigned offset = skb->h.raw - skb->data;
const unsigned offset = skb_transport_offset(skb);
u32 tcpsum;
tcpsum = offset << 16; /* sum start */

6
drivers/net/sungem.c
View File

@ -1028,10 +1028,8 @@ static int gem_start_xmit(struct sk_buff *skb, struct net_device *dev)
ctrl = 0;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
u64 csum_start_off, csum_stuff_off;
csum_start_off = (u64) (skb->h.raw - skb->data);
csum_stuff_off = csum_start_off + skb->csum_offset;
const u64 csum_start_off = skb_transport_offset(skb);
const u64 csum_stuff_off = csum_start_off + skb->csum_offset;
ctrl = (TXDCTRL_CENAB |
(csum_start_off << 15) |

6
drivers/net/sunhme.c
View File

@ -2269,10 +2269,8 @@ static int happy_meal_start_xmit(struct sk_buff *skb, struct net_device *dev)
tx_flags = TXFLAG_OWN;
if (skb->ip_summed == CHECKSUM_PARTIAL) {
u32 csum_start_off, csum_stuff_off;
csum_start_off = (u32) (skb->h.raw - skb->data);
csum_stuff_off = csum_start_off + skb->csum_offset;
const u32 csum_start_off = skb_transport_offset(skb);
const u32 csum_stuff_off = csum_start_off + skb->csum_offset;
tx_flags = (TXFLAG_OWN | TXFLAG_CSENABLE |
((csum_start_off << 14) & TXFLAG_CSBUFBEGIN) |

5
include/linux/skbuff.h
View File

@ -962,6 +962,11 @@ static inline void skb_reset_transport_header(struct sk_buff *skb)
skb->h.raw = skb->data;
}
static inline int skb_transport_offset(const struct sk_buff *skb)
{
return skb->h.raw - skb->data;
}
static inline unsigned char *skb_network_header(const struct sk_buff *skb)
{
return skb->nh.raw;

6
include/net/udplite.h
View File

@ -101,14 +101,14 @@ static inline int udplite_sender_cscov(struct udp_sock *up, struct udphdr *uh)
static inline __wsum udplite_csum_outgoing(struct sock *sk, struct sk_buff *skb)
{
int off, len, cscov = udplite_sender_cscov(udp_sk(sk), skb->h.uh);
int cscov = udplite_sender_cscov(udp_sk(sk), skb->h.uh);
__wsum csum = 0;
skb->ip_summed = CHECKSUM_NONE; /* no HW support for checksumming */
skb_queue_walk(&sk->sk_write_queue, skb) {
off = skb->h.raw - skb->data;
len = skb->len - off;
const int off = skb_transport_offset(skb);
const int len = skb->len - off;
csum = skb_checksum(skb, off, (cscov > len)? len : cscov, csum);

2
net/core/dev.c
View File

@ -1156,7 +1156,7 @@ EXPORT_SYMBOL(netif_device_attach);
int skb_checksum_help(struct sk_buff *skb)
{
__wsum csum;
int ret = 0, offset = skb->h.raw - skb->data;
int ret = 0, offset = skb_transport_offset(skb);
if (skb->ip_summed == CHECKSUM_COMPLETE)
goto out_set_summed;

2
net/core/skbuff.c
View File

@ -1348,7 +1348,7 @@ void skb_copy_and_csum_dev(const struct sk_buff *skb, u8 *to)
long csstart;
if (skb->ip_summed == CHECKSUM_PARTIAL)
csstart = skb->h.raw - skb->data;
csstart = skb_transport_offset(skb);
else
csstart = skb_headlen(skb);

2
net/ipv4/esp4.c
View File

@ -27,7 +27,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
int nfrags;
/* Strip IP+ESP header. */
__skb_pull(skb, skb->h.raw - skb->data);
__skb_pull(skb, skb_transport_offset(skb));
/* Now skb is pure payload to encrypt */
err = -ENOMEM;

2
net/ipv4/udp.c
View File

@ -435,7 +435,7 @@ static void udp4_hwcsum_outgoing(struct sock *sk, struct sk_buff *skb,
* fragments on the socket so that all csums of sk_buffs
* should be together
*/
offset = skb->h.raw - skb->data;
offset = skb_transport_offset(skb);
skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
skb->ip_summed = CHECKSUM_NONE;

9
net/ipv6/esp6.c
View File

@ -42,21 +42,18 @@
static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
{
int err;
int hdr_len;
struct ipv6hdr *top_iph;
struct ipv6_esp_hdr *esph;
struct crypto_blkcipher *tfm;
struct blkcipher_desc desc;
struct esp_data *esp;
struct sk_buff *trailer;
int blksize;
int clen;
int alen;
int nfrags;
esp = x->data;
hdr_len = skb->h.raw - skb->data +
sizeof(*esph) + esp->conf.ivlen;
struct esp_data *esp = x->data;
int hdr_len = (skb_transport_offset(skb) +
sizeof(*esph) + esp->conf.ivlen);
/* Strip IP+ESP header. */
__skb_pull(skb, hdr_len);

12
net/ipv6/exthdrs.c
View File

@ -146,7 +146,7 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
int off = skb->h.raw - skb->nh.raw;
int len = ((skb->h.raw[1]+1)<<3);
if ((skb->h.raw + len) - skb->data > skb_headlen(skb))
if (skb_transport_offset(skb) + len > skb_headlen(skb))
goto bad;
off += 2;
@ -288,8 +288,9 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
#endif
struct dst_entry *dst;
if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
!pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
!pskb_may_pull(skb, (skb_transport_offset(skb) +
((skb->h.raw[1] + 1) << 3)))) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INHDRERRORS);
kfree_skb(skb);
@ -387,8 +388,9 @@ static int ipv6_rthdr_rcv(struct sk_buff **skbp)
in6_dev_put(idev);
if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+8) ||
!pskb_may_pull(skb, (skb->h.raw-skb->data)+((skb->h.raw[1]+1)<<3))) {
if (!pskb_may_pull(skb, skb_transport_offset(skb) + 8) ||
!pskb_may_pull(skb, (skb_transport_offset(skb) +
((skb->h.raw[1] + 1) << 3)))) {
IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
IPSTATS_MIB_INHDRERRORS);
kfree_skb(skb);

2
net/ipv6/ip6_input.c
View File

@ -160,7 +160,7 @@ static inline int ip6_input_finish(struct sk_buff *skb)
rcu_read_lock();
resubmit:
idev = ip6_dst_idev(skb->dst);
if (!pskb_pull(skb, skb->h.raw - skb->data))
if (!pskb_pull(skb, skb_transport_offset(skb)))
goto discard;
nhoff = IP6CB(skb)->nhoff;
nexthdr = skb_network_header(skb)[nhoff];

4
net/ipv6/ipcomp6.c
View File

@ -124,15 +124,13 @@ static int ipcomp6_output(struct xfrm_state *x, struct sk_buff *skb)
{
int err;
struct ipv6hdr *top_iph;
int hdr_len;
struct ipv6_comp_hdr *ipch;
struct ipcomp_data *ipcd = x->data;
int plen, dlen;
u8 *start, *scratch;
struct crypto_comp *tfm;
int cpu;
hdr_len = skb->h.raw - skb->data;
int hdr_len = skb_transport_offset(skb);
/* check whether datagram len is larger than threshold */
if ((skb->len - hdr_len) < ipcd->threshold) {

5
net/ipv6/mip6.c
View File

@ -90,8 +90,9 @@ int mip6_mh_filter(struct sock *sk, struct sk_buff *skb)
{
struct ip6_mh *mh;
if (!pskb_may_pull(skb, (skb->h.raw - skb->data) + 8) ||
!pskb_may_pull(skb, (skb->h.raw - skb->data) + ((skb->h.raw[1] + 1) << 3)))
if (!pskb_may_pull(skb, (skb_transport_offset(skb)) + 8) ||
!pskb_may_pull(skb, (skb_transport_offset(skb) +
((skb->h.raw[1] + 1) << 3))))
return -1;
mh = (struct ip6_mh *)skb->h.raw;

4
net/ipv6/raw.c
View File

@ -513,7 +513,7 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
if (csum_skb)
continue;
len = skb->len - (skb->h.raw - skb->data);
len = skb->len - skb_transport_offset(skb);
if (offset >= len) {
offset -= len;
continue;
@ -525,7 +525,7 @@ static int rawv6_push_pending_frames(struct sock *sk, struct flowi *fl,
skb = csum_skb;
}
offset += skb->h.raw - skb->data;
offset += skb_transport_offset(skb);
if (skb_copy_bits(skb, offset, &csum, 2))
BUG();

3
net/ipv6/reassembly.c
View File

@ -718,7 +718,8 @@ static int ipv6_frag_rcv(struct sk_buff **skbp)
icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb->h.raw-skb->nh.raw);
return -1;
}
if (!pskb_may_pull(skb, (skb->h.raw-skb->data)+sizeof(struct frag_hdr))) {
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);
return -1;

2
net/sctp/input.c
View File

@ -141,7 +141,7 @@ int sctp_rcv(struct sk_buff *skb)
sh = (struct sctphdr *) skb->h.raw;
/* Pull up the IP and SCTP headers. */
__skb_pull(skb, skb->h.raw - skb->data);
__skb_pull(skb, skb_transport_offset(skb));
if (skb->len < sizeof(struct sctphdr))
goto discard_it;
if ((skb->ip_summed != CHECKSUM_UNNECESSARY) &&