[IPV4]: Add 'rtable' field in struct sk_buff to alias 'dst' and avoid casts

[deliverable/linux.git] / net / ipv4 / ip_output.c

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 18070ca65771c853dea40e08b02bb1e809b70535..dc494ea594a7f00ee7243f55d2f43350936a53ff 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -142,7 +142,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
                          __be32 saddr, __be32 daddr, struct ip_options *opt)
 {
        struct inet_sock *inet = inet_sk(sk);
-       struct rtable *rt = (struct rtable *)skb->dst;
+       struct rtable *rt = skb->rtable;
        struct iphdr *iph;
 
        /* Build the IP header. */
@@ -168,6 +168,7 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
        }
 
        skb->priority = sk->sk_priority;
+       skb->mark = sk->sk_mark;
 
        /* Send it out. */
        return ip_local_out(skb);
@@ -239,7 +240,7 @@ static int ip_finish_output(struct sk_buff *skb)
 int ip_mc_output(struct sk_buff *skb)
 {
        struct sock *sk = skb->sk;
-       struct rtable *rt = (struct rtable*)skb->dst;
+       struct rtable *rt = skb->rtable;
        struct net_device *dev = rt->u.dst.dev;
 
        /*
@@ -320,7 +321,7 @@ int ip_queue_xmit(struct sk_buff *skb, int ipfragok)
        /* Skip all of this if the packet is already routed,
         * f.e. by something like SCTP.
         */
-       rt = (struct rtable *) skb->dst;
+       rt = skb->rtable;
        if (rt != NULL)
                goto packet_routed;
 
@@ -385,6 +386,7 @@ packet_routed:
                             (skb_shinfo(skb)->gso_segs ?: 1) - 1);
 
        skb->priority = sk->sk_priority;
+       skb->mark = sk->sk_mark;
 
        return ip_local_out(skb);
 
@@ -439,7 +441,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
        unsigned int mtu, hlen, left, len, ll_rs, pad;
        int offset;
        __be16 not_last_frag;
-       struct rtable *rt = (struct rtable*)skb->dst;
+       struct rtable *rt = skb->rtable;
        int err = 0;
 
        dev = rt->u.dst.dev;
@@ -476,6 +478,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
        if (skb_shinfo(skb)->frag_list) {
                struct sk_buff *frag;
                int first_len = skb_pagelen(skb);
+               int truesizes = 0;
 
                if (first_len - hlen > mtu ||
                    ((first_len - hlen) & 7) ||
@@ -499,7 +502,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
                                sock_hold(skb->sk);
                                frag->sk = skb->sk;
                                frag->destructor = sock_wfree;
-                               skb->truesize -= frag->truesize;
+                               truesizes += frag->truesize;
                        }
                }
 
@@ -510,6 +513,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff*))
                frag = skb_shinfo(skb)->frag_list;
                skb_shinfo(skb)->frag_list = NULL;
                skb->data_len = first_len - skb_headlen(skb);
+               skb->truesize -= truesizes;
                skb->len = first_len;
                iph->tot_len = htons(first_len);
                iph->frag_off = htons(IP_MF);
@@ -1284,6 +1288,7 @@ int ip_push_pending_frames(struct sock *sk)
        iph->daddr = rt->rt_dst;
 
        skb->priority = sk->sk_priority;
+       skb->mark = sk->sk_mark;
        skb->dst = dst_clone(&rt->u.dst);
 
        if (iph->protocol == IPPROTO_ICMP)
@@ -1352,7 +1357,7 @@ void ip_send_reply(struct sock *sk, struct sk_buff *skb, struct ip_reply_arg *ar
        } replyopts;
        struct ipcm_cookie ipc;
        __be32 daddr;
-       struct rtable *rt = (struct rtable*)skb->dst;
+       struct rtable *rt = skb->rtable;
 
        if (ip_options_echo(&replyopts.opt, skb))
                return;