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[SK_BUFF]: Introduce skb_network_offset() 

For the quite common 'skb->nh.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 2007-03-10 22:16:10 -03:00 committed by David S. Miller
parent e7dd65dafd
commit bbe735e424
18 changed files with 33 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/isdn/i4l/isdn_net.c
View File

@ -1121,7 +1121,7 @@ isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
if (!skb) if (!skb)
return; return;
if (lp->p_encap == ISDN_NET_ENCAP_ETHER) { if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
int pullsize = (ulong)skb->nh.raw - (ulong)skb->data - ETH_HLEN; const int pullsize = skb_network_offset(skb) - ETH_HLEN;
if (pullsize > 0) { if (pullsize > 0) {
printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize); printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
skb_pull(skb, pullsize); skb_pull(skb, pullsize);

2
drivers/net/atl1/atl1_main.c
View File

@ -1300,7 +1300,7 @@ static int atl1_tso(struct atl1_adapter *adapter, struct sk_buff *skb,
~csum_tcpudp_magic(skb->nh.iph->saddr, ~csum_tcpudp_magic(skb->nh.iph->saddr,
skb->nh.iph->daddr, 0, skb->nh.iph->daddr, 0,
IPPROTO_TCP, 0); IPPROTO_TCP, 0);
ipofst = skb->nh.raw - skb->data; ipofst = skb_network_offset(skb);
if (ipofst != ENET_HEADER_SIZE) /* 802.3 frame */ if (ipofst != ENET_HEADER_SIZE) /* 802.3 frame */
tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT; tso->tsopl |= 1 << TSO_PARAM_ETHTYPE_SHIFT;

2
drivers/net/chelsio/sge.c
View File

@ -1865,7 +1865,7 @@ int t1_start_xmit(struct sk_buff *skb, struct net_device *dev)
++st->tx_tso; ++st->tx_tso;
eth_type = skb->nh.raw - skb->data == ETH_HLEN ? eth_type = skb_network_offset(skb) == ETH_HLEN ?
CPL_ETH_II : CPL_ETH_II_VLAN; CPL_ETH_II : CPL_ETH_II_VLAN;
hdr = (struct cpl_tx_pkt_lso *)skb_push(skb, sizeof(*hdr)); hdr = (struct cpl_tx_pkt_lso *)skb_push(skb, sizeof(*hdr));

2
drivers/net/cxgb3/sge.c
View File

@ -897,7 +897,7 @@ static void write_tx_pkt_wr(struct adapter *adap, struct sk_buff *skb,
d->flit[2] = 0; d->flit[2] = 0;
cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT_LSO); cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT_LSO);
hdr->cntrl = htonl(cntrl); hdr->cntrl = htonl(cntrl);
eth_type = skb->nh.raw - skb->data == ETH_HLEN ? eth_type = skb_network_offset(skb) == ETH_HLEN ?
CPL_ETH_II : CPL_ETH_II_VLAN; CPL_ETH_II : CPL_ETH_II_VLAN;
tso_info |= V_LSO_ETH_TYPE(eth_type) | tso_info |= V_LSO_ETH_TYPE(eth_type) |
V_LSO_IPHDR_WORDS(skb->nh.iph->ihl) | V_LSO_IPHDR_WORDS(skb->nh.iph->ihl) |

2
drivers/net/e1000/e1000_main.c
View File

@ -2910,7 +2910,7 @@ e1000_tso(struct e1000_adapter *adapter, struct e1000_tx_ring *tx_ring,
0); 0);
ipcse = 0; ipcse = 0;
} }
ipcss = skb->nh.raw - skb->data; ipcss = skb_network_offset(skb);
ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data; ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
tucss = skb->h.raw - skb->data; tucss = skb->h.raw - skb->data;
tucso = (void *)&(skb->h.th->check) - (void *)skb->data; tucso = (void *)&(skb->h.th->check) - (void *)skb->data;

2
drivers/net/gianfar.c
View File

@ -952,7 +952,7 @@ static inline void gfar_tx_checksum(struct sk_buff *skb, struct txfcb *fcb)
* frame (skb->data) and the start of the IP hdr. * frame (skb->data) and the start of the IP hdr.
* l4os is the distance between the start of the * l4os is the distance between the start of the
* l3 hdr and the l4 hdr */ * l3 hdr and the l4 hdr */
fcb->l3os = (u16)(skb->nh.raw - skb->data - GMAC_FCB_LEN); fcb->l3os = (u16)(skb_network_offset(skb) - GMAC_FCB_LEN);
fcb->l4os = (u16)(skb->h.raw - skb->nh.raw); fcb->l4os = (u16)(skb->h.raw - skb->nh.raw);
fcb->flags = flags; fcb->flags = flags;

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

@ -1195,7 +1195,7 @@ ixgb_tso(struct ixgb_adapter *adapter, struct sk_buff *skb)
skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr, skb->h.th->check = ~csum_tcpudp_magic(skb->nh.iph->saddr,
skb->nh.iph->daddr, skb->nh.iph->daddr,
0, IPPROTO_TCP, 0); 0, IPPROTO_TCP, 0);
ipcss = skb->nh.raw - skb->data; ipcss = skb_network_offset(skb);
ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data; ipcso = (void *)&(skb->nh.iph->check) - (void *)skb->data;
ipcse = skb->h.raw - skb->data - 1; ipcse = skb->h.raw - skb->data - 1;
tucss = skb->h.raw - skb->data; tucss = skb->h.raw - skb->data;

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

@ -386,7 +386,7 @@ void netxen_tso_check(struct netxen_adapter *adapter,
} }
adapter->stats.xmitcsummed++; adapter->stats.xmitcsummed++;
desc->tcp_hdr_offset = skb->h.raw - skb->data; desc->tcp_hdr_offset = skb->h.raw - skb->data;
desc->ip_hdr_offset = skb->nh.raw - skb->data; desc->ip_hdr_offset = skb_network_offset(skb);
} }
int netxen_is_flash_supported(struct netxen_adapter *adapter) int netxen_is_flash_supported(struct netxen_adapter *adapter)

5
include/linux/skbuff.h
View File

@ -965,6 +965,11 @@ static inline void skb_reset_network_header(struct sk_buff *skb)
skb->nh.raw = skb->data; skb->nh.raw = skb->data;
} }
static inline int skb_network_offset(const struct sk_buff *skb)
{
return skb->nh.raw - skb->data;
}
static inline unsigned char *skb_mac_header(const struct sk_buff *skb) static inline unsigned char *skb_mac_header(const struct sk_buff *skb)
{ {
return skb->mac.raw; return skb->mac.raw;

4
net/ax25/ax25_out.c
View File

@ -148,7 +148,7 @@ void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
if (ka9qfrag == 1) { if (ka9qfrag == 1) {
skb_reserve(skbn, frontlen + 2); skb_reserve(skbn, frontlen + 2);
skbn->nh.raw = skbn->data + (skb->nh.raw - skb->data); skbn->nh.raw = skbn->data + skb_network_offset(skb);
memcpy(skb_put(skbn, len), skb->data, len); memcpy(skb_put(skbn, len), skb->data, len);
p = skb_push(skbn, 2); p = skb_push(skbn, 2);
@ -161,7 +161,7 @@ void ax25_output(ax25_cb *ax25, int paclen, struct sk_buff *skb)
} }
} else { } else {
skb_reserve(skbn, frontlen + 1); skb_reserve(skbn, frontlen + 1);
skbn->nh.raw = skbn->data + (skb->nh.raw - skb->data); skbn->nh.raw = skbn->data + skb_network_offset(skb);
memcpy(skb_put(skbn, len), skb->data, len); memcpy(skb_put(skbn, len), skb->data, len);
p = skb_push(skbn, 1); p = skb_push(skbn, 1);
*p = AX25_P_TEXT; *p = AX25_P_TEXT;

6
net/core/neighbour.c
View File

@ -1125,7 +1125,7 @@ int neigh_compat_output(struct sk_buff *skb)
{ {
struct net_device *dev = skb->dev; struct net_device *dev = skb->dev;
__skb_pull(skb, skb->nh.raw - skb->data); __skb_pull(skb, skb_network_offset(skb));
if (dev->hard_header && if (dev->hard_header &&
dev->hard_header(skb, dev, ntohs(skb->protocol), NULL, NULL, dev->hard_header(skb, dev, ntohs(skb->protocol), NULL, NULL,
@ -1147,7 +1147,7 @@ int neigh_resolve_output(struct sk_buff *skb)
if (!dst || !(neigh = dst->neighbour)) if (!dst || !(neigh = dst->neighbour))
goto discard; goto discard;
__skb_pull(skb, skb->nh.raw - skb->data); __skb_pull(skb, skb_network_offset(skb));
if (!neigh_event_send(neigh, skb)) { if (!neigh_event_send(neigh, skb)) {
int err; int err;
@ -1190,7 +1190,7 @@ int neigh_connected_output(struct sk_buff *skb)
struct neighbour *neigh = dst->neighbour; struct neighbour *neigh = dst->neighbour;
struct net_device *dev = neigh->dev; struct net_device *dev = neigh->dev;
__skb_pull(skb, skb->nh.raw - skb->data); __skb_pull(skb, skb_network_offset(skb));
read_lock_bh(&neigh->lock); read_lock_bh(&neigh->lock);
err = dev->hard_header(skb, dev, ntohs(skb->protocol), err = dev->hard_header(skb, dev, ntohs(skb->protocol),

4
net/ipv4/ip_output.c
View File

@ -96,7 +96,7 @@ __inline__ void ip_send_check(struct iphdr *iph)
static int ip_dev_loopback_xmit(struct sk_buff *newskb) static int ip_dev_loopback_xmit(struct sk_buff *newskb)
{ {
skb_reset_mac_header(newskb); skb_reset_mac_header(newskb);
__skb_pull(newskb, newskb->nh.raw - newskb->data); __skb_pull(newskb, skb_network_offset(newskb));
newskb->pkt_type = PACKET_LOOPBACK; newskb->pkt_type = PACKET_LOOPBACK;
newskb->ip_summed = CHECKSUM_UNNECESSARY; newskb->ip_summed = CHECKSUM_UNNECESSARY;
BUG_TRAP(newskb->dst); BUG_TRAP(newskb->dst);
@ -1199,7 +1199,7 @@ int ip_push_pending_frames(struct sock *sk)
/* move skb->data to ip header from ext header */ /* move skb->data to ip header from ext header */
if (skb->data < skb->nh.raw) if (skb->data < skb->nh.raw)
__skb_pull(skb, skb->nh.raw - skb->data); __skb_pull(skb, skb_network_offset(skb));
while ((tmp_skb = __skb_dequeue(&sk->sk_write_queue)) != NULL) { 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->h.raw - skb->nh.raw);
*tail_skb = tmp_skb; *tail_skb = tmp_skb;

4
net/ipv6/icmp.c
View File

@ -206,7 +206,7 @@ static __inline__ int opt_unrec(struct sk_buff *skb, __u32 offset)
{ {
u8 _optval, *op; u8 _optval, *op;
offset += skb->nh.raw - skb->data; offset += skb_network_offset(skb);
op = skb_header_pointer(skb, offset, sizeof(_optval), &_optval); op = skb_header_pointer(skb, offset, sizeof(_optval), &_optval);
if (op == NULL) if (op == NULL)
return 1; return 1;
@ -431,7 +431,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
tclass = 0; tclass = 0;
msg.skb = skb; msg.skb = skb;
msg.offset = skb->nh.raw - skb->data; msg.offset = skb_network_offset(skb);
msg.type = type; msg.type = type;
len = skb->len - msg.offset; len = skb->len - msg.offset;

4
net/ipv6/ip6_output.c
View File

@ -89,7 +89,7 @@ static inline int ip6_output_finish(struct sk_buff *skb)
static int ip6_dev_loopback_xmit(struct sk_buff *newskb) static int ip6_dev_loopback_xmit(struct sk_buff *newskb)
{ {
skb_reset_mac_header(newskb); skb_reset_mac_header(newskb);
__skb_pull(newskb, newskb->nh.raw - newskb->data); __skb_pull(newskb, skb_network_offset(newskb));
newskb->pkt_type = PACKET_LOOPBACK; newskb->pkt_type = PACKET_LOOPBACK;
newskb->ip_summed = CHECKSUM_UNNECESSARY; newskb->ip_summed = CHECKSUM_UNNECESSARY;
BUG_TRAP(newskb->dst); BUG_TRAP(newskb->dst);
@ -1330,7 +1330,7 @@ int ip6_push_pending_frames(struct sock *sk)
/* move skb->data to ip header from ext header */ /* move skb->data to ip header from ext header */
if (skb->data < skb->nh.raw) if (skb->data < skb->nh.raw)
__skb_pull(skb, skb->nh.raw - skb->data); __skb_pull(skb, skb_network_offset(skb));
while ((tmp_skb = __skb_dequeue(&sk->sk_write_queue)) != NULL) { 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->h.raw - skb->nh.raw);
*tail_skb = tmp_skb; *tail_skb = tmp_skb;

4
net/netfilter/nf_conntrack_core.c
View File

@ -768,7 +768,7 @@ resolve_normal_ct(struct sk_buff *skb,
struct nf_conntrack_tuple_hash *h; struct nf_conntrack_tuple_hash *h;
struct nf_conn *ct; struct nf_conn *ct;
if (!nf_ct_get_tuple(skb, (unsigned int)(skb->nh.raw - skb->data), if (!nf_ct_get_tuple(skb, skb_network_offset(skb),
dataoff, l3num, protonum, &tuple, l3proto, dataoff, l3num, protonum, &tuple, l3proto,
l4proto)) { l4proto)) {
DEBUGP("resolve_normal_ct: Can't get tuple\n"); DEBUGP("resolve_normal_ct: Can't get tuple\n");
@ -960,7 +960,7 @@ void __nf_ct_refresh_acct(struct nf_conn *ct,
if (do_acct) { if (do_acct) {
ct->counters[CTINFO2DIR(ctinfo)].packets++; ct->counters[CTINFO2DIR(ctinfo)].packets++;
ct->counters[CTINFO2DIR(ctinfo)].bytes += ct->counters[CTINFO2DIR(ctinfo)].bytes +=
skb->len - (unsigned int)(skb->nh.raw - skb->data); skb->len - skb_network_offset(skb);
if ((ct->counters[CTINFO2DIR(ctinfo)].packets & 0x80000000) if ((ct->counters[CTINFO2DIR(ctinfo)].packets & 0x80000000)
|| (ct->counters[CTINFO2DIR(ctinfo)].bytes & 0x80000000)) || (ct->counters[CTINFO2DIR(ctinfo)].bytes & 0x80000000))

8
net/packet/af_packet.c
View File

@ -491,7 +491,7 @@ static int packet_rcv(struct sk_buff *skb, struct net_device *dev, struct packet
skb_push(skb, skb->data - skb_mac_header(skb)); skb_push(skb, skb->data - skb_mac_header(skb));
else if (skb->pkt_type == PACKET_OUTGOING) { else if (skb->pkt_type == PACKET_OUTGOING) {
/* Special case: outgoing packets have ll header at head */ /* Special case: outgoing packets have ll header at head */
skb_pull(skb, skb->nh.raw - skb->data); skb_pull(skb, skb_network_offset(skb));
} }
} }
@ -595,7 +595,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
skb_push(skb, skb->data - skb_mac_header(skb)); skb_push(skb, skb->data - skb_mac_header(skb));
else if (skb->pkt_type == PACKET_OUTGOING) { else if (skb->pkt_type == PACKET_OUTGOING) {
/* Special case: outgoing packets have ll header at head */ /* Special case: outgoing packets have ll header at head */
skb_pull(skb, skb->nh.raw - skb->data); skb_pull(skb, skb_network_offset(skb));
} }
} }
@ -613,7 +613,7 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev, struct packe
if (sk->sk_type == SOCK_DGRAM) { if (sk->sk_type == SOCK_DGRAM) {
macoff = netoff = TPACKET_ALIGN(TPACKET_HDRLEN) + 16; macoff = netoff = TPACKET_ALIGN(TPACKET_HDRLEN) + 16;
} else { } else {
unsigned maclen = skb->nh.raw - skb->data; unsigned maclen = skb_network_offset(skb);
netoff = TPACKET_ALIGN(TPACKET_HDRLEN + (maclen < 16 ? 16 : maclen)); netoff = TPACKET_ALIGN(TPACKET_HDRLEN + (maclen < 16 ? 16 : maclen));
macoff = netoff - maclen; macoff = netoff - maclen;
} }
@ -1145,7 +1145,7 @@ static int packet_recvmsg(struct kiocb *iocb, struct socket *sock,
aux.tp_len = PACKET_SKB_CB(skb)->origlen; aux.tp_len = PACKET_SKB_CB(skb)->origlen;
aux.tp_snaplen = skb->len; aux.tp_snaplen = skb->len;
aux.tp_mac = 0; aux.tp_mac = 0;
aux.tp_net = skb->nh.raw - skb->data; aux.tp_net = skb_network_offset(skb);
put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux); put_cmsg(msg, SOL_PACKET, PACKET_AUXDATA, sizeof(aux), &aux);
} }

2
net/sched/sch_teql.c
View File

@ -323,7 +323,7 @@ restart:
nores = 1; nores = 1;
break; break;
} }
__skb_pull(skb, skb->nh.raw - skb->data); __skb_pull(skb, skb_network_offset(skb));
} while ((q = NEXT_SLAVE(q)) != start); } while ((q = NEXT_SLAVE(q)) != start);
if (nores && skb_res == NULL) { if (nores && skb_res == NULL) {

4
security/selinux/hooks.c
View File

@ -2944,7 +2944,7 @@ static int selinux_parse_skb_ipv4(struct sk_buff *skb,
int offset, ihlen, ret = -EINVAL; int offset, ihlen, ret = -EINVAL;
struct iphdr _iph, *ih; struct iphdr _iph, *ih;
offset = skb->nh.raw - skb->data; offset = skb_network_offset(skb);
ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph); ih = skb_header_pointer(skb, offset, sizeof(_iph), &_iph);
if (ih == NULL) if (ih == NULL)
goto out; goto out;
@ -3026,7 +3026,7 @@ static int selinux_parse_skb_ipv6(struct sk_buff *skb,
int ret = -EINVAL, offset; int ret = -EINVAL, offset;
struct ipv6hdr _ipv6h, *ip6; struct ipv6hdr _ipv6h, *ip6;
offset = skb->nh.raw - skb->data; offset = skb_network_offset(skb);
ip6 = skb_header_pointer(skb, offset, sizeof(_ipv6h), &_ipv6h); ip6 = skb_header_pointer(skb, offset, sizeof(_ipv6h), &_ipv6h);
if (ip6 == NULL) if (ip6 == NULL)
goto out; goto out;