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[IPV4]: encapsulation annotations

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Al Viro
2006-11-08 00:23:14 -08:00
committed by David S. Miller
부모 4806126d78
커밋 d5a0a1e310
6개의 변경된 파일과 44개의 추가작업 그리고 44개의 파일을 삭제
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52
net/ipv4/ip_gre.c
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@@ -144,7 +144,7 @@ static struct net_device *ipgre_fb_tunnel_dev;
*/
#define HASH_SIZE 16
#define HASH(addr) ((addr^(addr>>4))&0xF)
#define HASH(addr) (((__force u32)addr^((__force u32)addr>>4))&0xF)
static struct ip_tunnel *tunnels[4][HASH_SIZE];
@@ -157,7 +157,7 @@ static DEFINE_RWLOCK(ipgre_lock);
/* Given src, dst and key, find appropriate for input tunnel. */
static struct ip_tunnel * ipgre_tunnel_lookup(u32 remote, u32 local, u32 key)
static struct ip_tunnel * ipgre_tunnel_lookup(__be32 remote, __be32 local, __be32 key)
{
unsigned h0 = HASH(remote);
unsigned h1 = HASH(key);
@@ -194,9 +194,9 @@ static struct ip_tunnel * ipgre_tunnel_lookup(u32 remote, u32 local, u32 key)
static struct ip_tunnel **ipgre_bucket(struct ip_tunnel *t)
{
u32 remote = t->parms.iph.daddr;
u32 local = t->parms.iph.saddr;
u32 key = t->parms.i_key;
__be32 remote = t->parms.iph.daddr;
__be32 local = t->parms.iph.saddr;
__be32 key = t->parms.i_key;
unsigned h = HASH(key);
int prio = 0;
@@ -236,9 +236,9 @@ static void ipgre_tunnel_unlink(struct ip_tunnel *t)
static struct ip_tunnel * ipgre_tunnel_locate(struct ip_tunnel_parm *parms, int create)
{
u32 remote = parms->iph.daddr;
u32 local = parms->iph.saddr;
u32 key = parms->i_key;
__be32 remote = parms->iph.daddr;
__be32 local = parms->iph.saddr;
__be32 key = parms->i_key;
struct ip_tunnel *t, **tp, *nt;
struct net_device *dev;
unsigned h = HASH(key);
@@ -319,12 +319,12 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
*/
struct iphdr *iph = (struct iphdr*)skb->data;
u16 *p = (u16*)(skb->data+(iph->ihl<<2));
__be16 *p = (__be16*)(skb->data+(iph->ihl<<2));
int grehlen = (iph->ihl<<2) + 4;
int type = skb->h.icmph->type;
int code = skb->h.icmph->code;
struct ip_tunnel *t;
u16 flags;
__be16 flags;
flags = p[0];
if (flags&(GRE_CSUM|GRE_KEY|GRE_SEQ|GRE_ROUTING|GRE_VERSION)) {
@@ -370,7 +370,7 @@ static void ipgre_err(struct sk_buff *skb, u32 info)
}
read_lock(&ipgre_lock);
t = ipgre_tunnel_lookup(iph->daddr, iph->saddr, (flags&GRE_KEY) ? *(((u32*)p) + (grehlen>>2) - 1) : 0);
t = ipgre_tunnel_lookup(iph->daddr, iph->saddr, (flags&GRE_KEY) ? *(((__be32*)p) + (grehlen>>2) - 1) : 0);
if (t == NULL || t->parms.iph.daddr == 0 || MULTICAST(t->parms.iph.daddr))
goto out;
@@ -388,14 +388,14 @@ out:
#else
struct iphdr *iph = (struct iphdr*)dp;
struct iphdr *eiph;
u16 *p = (u16*)(dp+(iph->ihl<<2));
__be16 *p = (__be16*)(dp+(iph->ihl<<2));
int type = skb->h.icmph->type;
int code = skb->h.icmph->code;
int rel_type = 0;
int rel_code = 0;
__be32 rel_info = 0;
__u32 n = 0;
u16 flags;
__be16 flags;
int grehlen = (iph->ihl<<2) + 4;
struct sk_buff *skb2;
struct flowi fl;
@@ -556,9 +556,9 @@ static int ipgre_rcv(struct sk_buff *skb)
{
struct iphdr *iph;
u8 *h;
u16 flags;
__be16 flags;
u16 csum = 0;
u32 key = 0;
__be32 key = 0;
u32 seqno = 0;
struct ip_tunnel *tunnel;
int offset = 4;
@@ -568,7 +568,7 @@ static int ipgre_rcv(struct sk_buff *skb)
iph = skb->nh.iph;
h = skb->data;
flags = *(u16*)h;
flags = *(__be16*)h;
if (flags&(GRE_CSUM|GRE_KEY|GRE_ROUTING|GRE_SEQ|GRE_VERSION)) {
/* - Version must be 0.
@@ -592,11 +592,11 @@ static int ipgre_rcv(struct sk_buff *skb)
offset += 4;
}
if (flags&GRE_KEY) {
key = *(u32*)(h + offset);
key = *(__be32*)(h + offset);
offset += 4;
}
if (flags&GRE_SEQ) {
seqno = ntohl(*(u32*)(h + offset));
seqno = ntohl(*(__be32*)(h + offset));
offset += 4;
}
}
@@ -605,7 +605,7 @@ static int ipgre_rcv(struct sk_buff *skb)
if ((tunnel = ipgre_tunnel_lookup(iph->saddr, iph->daddr, key)) != NULL) {
secpath_reset(skb);
skb->protocol = *(u16*)(h + 2);
skb->protocol = *(__be16*)(h + 2);
/* WCCP version 1 and 2 protocol decoding.
* - Change protocol to IP
* - When dealing with WCCPv2, Skip extra 4 bytes in GRE header
@@ -673,13 +673,13 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
struct iphdr *old_iph = skb->nh.iph;
struct iphdr *tiph;
u8 tos;
u16 df;
__be16 df;
struct rtable *rt; /* Route to the other host */
struct net_device *tdev; /* Device to other host */
struct iphdr *iph; /* Our new IP header */
int max_headroom; /* The extra header space needed */
int gre_hlen;
u32 dst;
__be32 dst;
int mtu;
if (tunnel->recursion++) {
@@ -860,11 +860,11 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
iph->ttl = dst_metric(&rt->u.dst, RTAX_HOPLIMIT);
}
((u16*)(iph+1))[0] = tunnel->parms.o_flags;
((u16*)(iph+1))[1] = skb->protocol;
((__be16*)(iph+1))[0] = tunnel->parms.o_flags;
((__be16*)(iph+1))[1] = skb->protocol;
if (tunnel->parms.o_flags&(GRE_KEY|GRE_CSUM|GRE_SEQ)) {
u32 *ptr = (u32*)(((u8*)iph) + tunnel->hlen - 4);
__be32 *ptr = (__be32*)(((u8*)iph) + tunnel->hlen - 4);
if (tunnel->parms.o_flags&GRE_SEQ) {
++tunnel->o_seqno;
@@ -877,7 +877,7 @@ static int ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
}
if (tunnel->parms.o_flags&GRE_CSUM) {
*ptr = 0;
*(__u16*)ptr = ip_compute_csum((void*)(iph+1), skb->len - sizeof(struct iphdr));
*(__be16*)ptr = ip_compute_csum((void*)(iph+1), skb->len - sizeof(struct iphdr));
}
}
@@ -1068,7 +1068,7 @@ static int ipgre_header(struct sk_buff *skb, struct net_device *dev, unsigned sh
{
struct ip_tunnel *t = netdev_priv(dev);
struct iphdr *iph = (struct iphdr *)skb_push(skb, t->hlen);
u16 *p = (u16*)(iph+1);
__be16 *p = (__be16*)(iph+1);
memcpy(iph, &t->parms.iph, sizeof(struct iphdr));
p[0] = t->parms.o_flags;