[TCP]: Remove lost_retrans zero seqno special cases

[linux-2.6-omap-h63xx.git] / net / ipv4 / ipip.c

diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 3ec5ce0f5498cb17deead77b228e0408e3f9c050..5cd5bbe1379aa10c343631bdd05dfa322041d347 100644 (file)
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -157,10 +157,10 @@ static struct ip_tunnel * ipip_tunnel_lookup(__be32 remote, __be32 local)
        return NULL;
 }
 
-static struct ip_tunnel **ipip_bucket(struct ip_tunnel *t)
+static struct ip_tunnel **__ipip_bucket(struct ip_tunnel_parm *parms)
 {
-       __be32 remote = t->parms.iph.daddr;
-       __be32 local = t->parms.iph.saddr;
+       __be32 remote = parms->iph.daddr;
+       __be32 local = parms->iph.saddr;
        unsigned h = 0;
        int prio = 0;
 
@@ -175,6 +175,10 @@ static struct ip_tunnel **ipip_bucket(struct ip_tunnel *t)
        return &tunnels[prio][h];
 }
 
+static inline struct ip_tunnel **ipip_bucket(struct ip_tunnel *t)
+{
+       return __ipip_bucket(&t->parms);
+}
 
 static void ipip_tunnel_unlink(struct ip_tunnel *t)
 {
@@ -206,19 +210,9 @@ static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int c
        __be32 local = parms->iph.saddr;
        struct ip_tunnel *t, **tp, *nt;
        struct net_device *dev;
-       unsigned h = 0;
-       int prio = 0;
        char name[IFNAMSIZ];
 
-       if (remote) {
-               prio |= 2;
-               h ^= HASH(remote);
-       }
-       if (local) {
-               prio |= 1;
-               h ^= HASH(local);
-       }
-       for (tp = &tunnels[prio][h]; (t = *tp) != NULL; tp = &t->next) {
+       for (tp = __ipip_bucket(parms); (t = *tp) != NULL; tp = &t->next) {
                if (local == t->parms.iph.saddr && remote == t->parms.iph.daddr)
                        return t;
        }
@@ -231,7 +225,7 @@ static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int c
                int i;
                for (i=1; i<100; i++) {
                        sprintf(name, "tunl%d", i);
-                       if (__dev_get_by_name(name) == NULL)
+                       if (__dev_get_by_name(&init_net, name) == NULL)
                                break;
                }
                if (i==100)
@@ -243,7 +237,6 @@ static struct ip_tunnel * ipip_tunnel_locate(struct ip_tunnel_parm *parms, int c
                return NULL;
 
        nt = netdev_priv(dev);
-       SET_MODULE_OWNER(dev);
        dev->init = ipip_tunnel_init;
        nt->parms = *parms;
 
@@ -280,8 +273,8 @@ static int ipip_err(struct sk_buff *skb, u32 info)
    ICMP in the real Internet is absolutely infeasible.
  */
        struct iphdr *iph = (struct iphdr*)skb->data;
-       int type = skb->h.icmph->type;
-       int code = skb->h.icmph->code;
+       const int type = icmp_hdr(skb)->type;
+       const int code = icmp_hdr(skb)->code;
        struct ip_tunnel *t;
        int err;
 
@@ -336,8 +329,8 @@ out:
        struct iphdr *iph = (struct iphdr*)dp;
        int hlen = iph->ihl<<2;
        struct iphdr *eiph;
-       int type = skb->h.icmph->type;
-       int code = skb->h.icmph->code;
+       const int type = icmp_hdr(skb)->type;
+       const int code = icmp_hdr(skb)->code;
        int rel_type = 0;
        int rel_code = 0;
        __be32 rel_info = 0;
@@ -354,7 +347,7 @@ out:
        default:
                return 0;
        case ICMP_PARAMETERPROB:
-               n = ntohl(skb->h.icmph->un.gateway) >> 24;
+               n = ntohl(icmp_hdr(skb)->un.gateway) >> 24;
                if (n < hlen)
                        return 0;
 
@@ -373,7 +366,7 @@ out:
                        return 0;
                case ICMP_FRAG_NEEDED:
                        /* And it is the only really necessary thing :-) */
-                       n = ntohs(skb->h.icmph->un.frag.mtu);
+                       n = ntohs(icmp_hdr(skb)->un.frag.mtu);
                        if (n < hlen+68)
                                return 0;
                        n -= hlen;
@@ -405,7 +398,7 @@ out:
        dst_release(skb2->dst);
        skb2->dst = NULL;
        skb_pull(skb2, skb->data - (u8*)eiph);
-       skb2->nh.raw = skb2->data;
+       skb_reset_network_header(skb2);
 
        /* Try to guess incoming interface */
        memset(&fl, 0, sizeof(fl));
@@ -461,9 +454,10 @@ out:
 #endif
 }
 
-static inline void ipip_ecn_decapsulate(struct iphdr *outer_iph, struct sk_buff *skb)
+static inline void ipip_ecn_decapsulate(const struct iphdr *outer_iph,
+                                       struct sk_buff *skb)
 {
-       struct iphdr *inner_iph = skb->nh.iph;
+       struct iphdr *inner_iph = ip_hdr(skb);
 
        if (INET_ECN_is_ce(outer_iph->tos))
                IP_ECN_set_ce(inner_iph);
@@ -471,10 +465,8 @@ static inline void ipip_ecn_decapsulate(struct iphdr *outer_iph, struct sk_buff
 
 static int ipip_rcv(struct sk_buff *skb)
 {
-       struct iphdr *iph;
        struct ip_tunnel *tunnel;
-
-       iph = skb->nh.iph;
+       const struct iphdr *iph = ip_hdr(skb);
 
        read_lock(&ipip_lock);
        if ((tunnel = ipip_tunnel_lookup(iph->saddr, iph->daddr)) != NULL) {
@@ -486,8 +478,8 @@ static int ipip_rcv(struct sk_buff *skb)
 
                secpath_reset(skb);
 
-               skb->mac.raw = skb->nh.raw;
-               skb->nh.raw = skb->data;
+               skb->mac_header = skb->network_header;
+               skb_reset_network_header(skb);
                skb->protocol = htons(ETH_P_IP);
                skb->pkt_type = PACKET_HOST;
 
@@ -521,7 +513,7 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
        __be16 df = tiph->frag_off;
        struct rtable *rt;                      /* Route to the other host */
        struct net_device *tdev;                        /* Device to other host */
-       struct iphdr  *old_iph = skb->nh.iph;
+       struct iphdr  *old_iph = ip_hdr(skb);
        struct iphdr  *iph;                     /* Our new IP header */
        int    max_headroom;                    /* The extra header space needed */
        __be32 dst = tiph->daddr;
@@ -602,7 +594,8 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
         */
        max_headroom = (LL_RESERVED_SPACE(tdev)+sizeof(struct iphdr));
 
-       if (skb_headroom(skb) < max_headroom || skb_cloned(skb) || skb_shared(skb)) {
+       if (skb_headroom(skb) < max_headroom || skb_shared(skb) ||
+           (skb_cloned(skb) && !skb_clone_writable(skb, 0))) {
                struct sk_buff *new_skb = skb_realloc_headroom(skb, max_headroom);
                if (!new_skb) {
                        ip_rt_put(rt);
@@ -615,11 +608,12 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
                        skb_set_owner_w(new_skb, skb->sk);
                dev_kfree_skb(skb);
                skb = new_skb;
-               old_iph = skb->nh.iph;
+               old_iph = ip_hdr(skb);
        }
 
-       skb->h.raw = skb->nh.raw;
-       skb->nh.raw = skb_push(skb, sizeof(struct iphdr));
+       skb->transport_header = skb->network_header;
+       skb_push(skb, sizeof(struct iphdr));
+       skb_reset_network_header(skb);
        memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
        IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED |
                              IPSKB_REROUTED);
@@ -630,7 +624,7 @@ static int ipip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
         *      Push down and install the IPIP header.
         */
 
-       iph                     =       skb->nh.iph;
+       iph                     =       ip_hdr(skb);
        iph->version            =       4;
        iph->ihl                =       sizeof(struct iphdr)>>2;
        iph->frag_off           =       df;
@@ -780,7 +774,6 @@ static int ipip_tunnel_change_mtu(struct net_device *dev, int new_mtu)
 
 static void ipip_tunnel_setup(struct net_device *dev)
 {
-       SET_MODULE_OWNER(dev);
        dev->uninit             = ipip_tunnel_uninit;
        dev->hard_start_xmit    = ipip_tunnel_xmit;
        dev->get_stats          = ipip_tunnel_get_stats;
@@ -827,7 +820,7 @@ static int ipip_tunnel_init(struct net_device *dev)
        }
 
        if (!tdev && tunnel->parms.link)
-               tdev = __dev_get_by_index(tunnel->parms.link);
+               tdev = __dev_get_by_index(&init_net, tunnel->parms.link);
 
        if (tdev) {
                dev->hard_header_len = tdev->hard_header_len + sizeof(struct iphdr);