X-Git-Url: https://git.karo-electronics.de/?a=blobdiff_plain;f=net%2Fipv4%2Fip_output.c;h=04b69896df5fc743021efd4d4a1705b7de146333;hb=c0068c85897f06205d4c35cf4bf9161be90690e9;hp=9a4a6c96cb0d634414691da197bf9e337fe18f81;hpb=8b108c609adefd98577c35f0a41497a610041a6c;p=karo-tx-linux.git

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 9a4a6c96cb0d..04b69896df5f 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -89,6 +89,7 @@ __inline__ void ip_send_check(struct iphdr *iph)
 	iph->check = 0;
 	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
 }
+EXPORT_SYMBOL(ip_send_check);
 
 int __ip_local_out(struct sk_buff *skb)
 {
@@ -151,15 +152,15 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
 	iph->version  = 4;
 	iph->ihl      = 5;
 	iph->tos      = inet->tos;
-	if (ip_dont_fragment(sk, &rt->u.dst))
+	if (ip_dont_fragment(sk, &rt->dst))
 		iph->frag_off = htons(IP_DF);
 	else
 		iph->frag_off = 0;
-	iph->ttl      = ip_select_ttl(inet, &rt->u.dst);
+	iph->ttl      = ip_select_ttl(inet, &rt->dst);
 	iph->daddr    = rt->rt_dst;
 	iph->saddr    = rt->rt_src;
 	iph->protocol = sk->sk_protocol;
-	ip_select_ident(iph, &rt->u.dst, sk);
+	ip_select_ident(iph, &rt->dst, sk);
 
 	if (opt && opt->optlen) {
 		iph->ihl += opt->optlen>>2;
@@ -172,7 +173,6 @@ int ip_build_and_send_pkt(struct sk_buff *skb, struct sock *sk,
 	/* Send it out. */
 	return ip_local_out(skb);
 }
-
 EXPORT_SYMBOL_GPL(ip_build_and_send_pkt);
 
 static inline int ip_finish_output2(struct sk_buff *skb)
@@ -240,7 +240,7 @@ int ip_mc_output(struct sk_buff *skb)
 {
 	struct sock *sk = skb->sk;
 	struct rtable *rt = skb_rtable(skb);
-	struct net_device *dev = rt->u.dst.dev;
+	struct net_device *dev = rt->dst.dev;
 
 	/*
 	 *	If the indicated interface is up and running, send the packet.
@@ -359,9 +359,9 @@ int ip_queue_xmit(struct sk_buff *skb)
 			if (ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 0))
 				goto no_route;
 		}
-		sk_setup_caps(sk, &rt->u.dst);
+		sk_setup_caps(sk, &rt->dst);
 	}
-	skb_dst_set_noref(skb, &rt->u.dst);
+	skb_dst_set_noref(skb, &rt->dst);
 
 packet_routed:
 	if (opt && opt->is_strictroute && rt->rt_dst != rt->rt_gateway)
@@ -372,11 +372,11 @@ packet_routed:
 	skb_reset_network_header(skb);
 	iph = ip_hdr(skb);
 	*((__be16 *)iph) = htons((4 << 12) | (5 << 8) | (inet->tos & 0xff));
-	if (ip_dont_fragment(sk, &rt->u.dst) && !skb->local_df)
+	if (ip_dont_fragment(sk, &rt->dst) && !skb->local_df)
 		iph->frag_off = htons(IP_DF);
 	else
 		iph->frag_off = 0;
-	iph->ttl      = ip_select_ttl(inet, &rt->u.dst);
+	iph->ttl      = ip_select_ttl(inet, &rt->dst);
 	iph->protocol = sk->sk_protocol;
 	iph->saddr    = rt->rt_src;
 	iph->daddr    = rt->rt_dst;
@@ -387,7 +387,7 @@ packet_routed:
 		ip_options_build(skb, opt, inet->inet_daddr, rt, 0);
 	}
 
-	ip_select_ident_more(iph, &rt->u.dst, sk,
+	ip_select_ident_more(iph, &rt->dst, sk,
 			     (skb_shinfo(skb)->gso_segs ?: 1) - 1);
 
 	skb->priority = sk->sk_priority;
@@ -403,6 +403,7 @@ no_route:
 	kfree_skb(skb);
 	return -EHOSTUNREACH;
 }
+EXPORT_SYMBOL(ip_queue_xmit);
 
 
 static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
@@ -411,7 +412,7 @@ static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
 	to->priority = from->priority;
 	to->protocol = from->protocol;
 	skb_dst_drop(to);
-	skb_dst_set(to, dst_clone(skb_dst(from)));
+	skb_dst_copy(to, from);
 	to->dev = from->dev;
 	to->mark = from->mark;
 
@@ -442,17 +443,16 @@ static void ip_copy_metadata(struct sk_buff *to, struct sk_buff *from)
 int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 {
 	struct iphdr *iph;
-	int raw = 0;
 	int ptr;
 	struct net_device *dev;
 	struct sk_buff *skb2;
-	unsigned int mtu, hlen, left, len, ll_rs, pad;
+	unsigned int mtu, hlen, left, len, ll_rs;
 	int offset;
 	__be16 not_last_frag;
 	struct rtable *rt = skb_rtable(skb);
 	int err = 0;
 
-	dev = rt->u.dst.dev;
+	dev = rt->dst.dev;
 
 	/*
 	 *	Point into the IP datagram header.
@@ -473,7 +473,7 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 	 */
 
 	hlen = iph->ihl * 4;
-	mtu = dst_mtu(&rt->u.dst) - hlen;	/* Size of data space */
+	mtu = dst_mtu(&rt->dst) - hlen;	/* Size of data space */
 #ifdef CONFIG_BRIDGE_NETFILTER
 	if (skb->nf_bridge)
 		mtu -= nf_bridge_mtu_reduction(skb);
@@ -580,14 +580,12 @@ int ip_fragment(struct sk_buff *skb, int (*output)(struct sk_buff *))
 
 slow_path:
 	left = skb->len - hlen;		/* Space per frame */
-	ptr = raw + hlen;		/* Where to start from */
+	ptr = hlen;		/* Where to start from */
 
 	/* for bridged IP traffic encapsulated inside f.e. a vlan header,
 	 * we need to make room for the encapsulating header
 	 */
-	pad = nf_bridge_pad(skb);
-	ll_rs = LL_RESERVED_SPACE_EXTRA(rt->u.dst.dev, pad);
-	mtu -= pad;
+	ll_rs = LL_RESERVED_SPACE_EXTRA(rt->dst.dev, nf_bridge_pad(skb));
 
 	/*
 	 *	Fragment the datagram.
@@ -697,7 +695,6 @@ fail:
 	IP_INC_STATS(dev_net(dev), IPSTATS_MIB_FRAGFAILS);
 	return err;
 }
-
 EXPORT_SYMBOL(ip_fragment);
 
 int
@@ -716,6 +713,7 @@ ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk
 	}
 	return 0;
 }
+EXPORT_SYMBOL(ip_generic_getfrag);
 
 static inline __wsum
 csum_page(struct page *page, int offset, int copy)
@@ -833,13 +831,13 @@ int ip_append_data(struct sock *sk,
 		 */
 		*rtp = NULL;
 		inet->cork.fragsize = mtu = inet->pmtudisc == IP_PMTUDISC_PROBE ?
-					    rt->u.dst.dev->mtu :
-					    dst_mtu(rt->u.dst.path);
-		inet->cork.dst = &rt->u.dst;
+					    rt->dst.dev->mtu :
+					    dst_mtu(rt->dst.path);
+		inet->cork.dst = &rt->dst;
 		inet->cork.length = 0;
 		sk->sk_sndmsg_page = NULL;
 		sk->sk_sndmsg_off = 0;
-		if ((exthdrlen = rt->u.dst.header_len) != 0) {
+		if ((exthdrlen = rt->dst.header_len) != 0) {
 			length += exthdrlen;
 			transhdrlen += exthdrlen;
 		}
@@ -852,7 +850,7 @@ int ip_append_data(struct sock *sk,
 		exthdrlen = 0;
 		mtu = inet->cork.fragsize;
 	}
-	hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
+	hh_len = LL_RESERVED_SPACE(rt->dst.dev);
 
 	fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0);
 	maxfraglen = ((mtu - fragheaderlen) & ~7) + fragheaderlen;
@@ -869,14 +867,16 @@ int ip_append_data(struct sock *sk,
 	 */
 	if (transhdrlen &&
 	    length + fragheaderlen <= mtu &&
-	    rt->u.dst.dev->features & NETIF_F_V4_CSUM &&
+	    rt->dst.dev->features & NETIF_F_V4_CSUM &&
 	    !exthdrlen)
 		csummode = CHECKSUM_PARTIAL;
 
+	skb = skb_peek_tail(&sk->sk_write_queue);
+
 	inet->cork.length += length;
-	if (((length> mtu) || !skb_queue_empty(&sk->sk_write_queue)) &&
+	if (((length > mtu) || (skb && skb_is_gso(skb))) &&
 	    (sk->sk_protocol == IPPROTO_UDP) &&
-	    (rt->u.dst.dev->features & NETIF_F_UFO)) {
+	    (rt->dst.dev->features & NETIF_F_UFO)) {
 		err = ip_ufo_append_data(sk, getfrag, from, length, hh_len,
 					 fragheaderlen, transhdrlen, mtu,
 					 flags);
@@ -892,7 +892,7 @@ int ip_append_data(struct sock *sk,
 	 * adding appropriate IP header.
 	 */
 
-	if ((skb = skb_peek_tail(&sk->sk_write_queue)) == NULL)
+	if (!skb)
 		goto alloc_new_skb;
 
 	while (length > 0) {
@@ -924,7 +924,7 @@ alloc_new_skb:
 			fraglen = datalen + fragheaderlen;
 
 			if ((flags & MSG_MORE) &&
-			    !(rt->u.dst.dev->features&NETIF_F_SG))
+			    !(rt->dst.dev->features&NETIF_F_SG))
 				alloclen = mtu;
 			else
 				alloclen = datalen + fragheaderlen;
@@ -935,7 +935,7 @@ alloc_new_skb:
 			 * the last.
 			 */
 			if (datalen == length + fraggap)
-				alloclen += rt->u.dst.trailer_len;
+				alloclen += rt->dst.trailer_len;
 
 			if (transhdrlen) {
 				skb = sock_alloc_send_skb(sk,
@@ -1008,7 +1008,7 @@ alloc_new_skb:
 		if (copy > length)
 			copy = length;
 
-		if (!(rt->u.dst.dev->features&NETIF_F_SG)) {
+		if (!(rt->dst.dev->features&NETIF_F_SG)) {
 			unsigned int off;
 
 			off = skb->len;
@@ -1103,10 +1103,10 @@ ssize_t	ip_append_page(struct sock *sk, struct page *page,
 	if (inet->cork.flags & IPCORK_OPT)
 		opt = inet->cork.opt;
 
-	if (!(rt->u.dst.dev->features&NETIF_F_SG))
+	if (!(rt->dst.dev->features&NETIF_F_SG))
 		return -EOPNOTSUPP;
 
-	hh_len = LL_RESERVED_SPACE(rt->u.dst.dev);
+	hh_len = LL_RESERVED_SPACE(rt->dst.dev);
 	mtu = inet->cork.fragsize;
 
 	fragheaderlen = sizeof(struct iphdr) + (opt ? opt->optlen : 0);
@@ -1121,8 +1121,9 @@ ssize_t	ip_append_page(struct sock *sk, struct page *page,
 		return -EINVAL;
 
 	inet->cork.length += size;
-	if ((sk->sk_protocol == IPPROTO_UDP) &&
-	    (rt->u.dst.dev->features & NETIF_F_UFO)) {
+	if ((size + skb->len > mtu) &&
+	    (sk->sk_protocol == IPPROTO_UDP) &&
+	    (rt->dst.dev->features & NETIF_F_UFO)) {
 		skb_shinfo(skb)->gso_size = mtu - fragheaderlen;
 		skb_shinfo(skb)->gso_type = SKB_GSO_UDP;
 	}
@@ -1274,8 +1275,8 @@ int ip_push_pending_frames(struct sock *sk)
 	 * If local_df is set too, we still allow to fragment this frame
 	 * locally. */
 	if (inet->pmtudisc >= IP_PMTUDISC_DO ||
-	    (skb->len <= dst_mtu(&rt->u.dst) &&
-	     ip_dont_fragment(sk, &rt->u.dst)))
+	    (skb->len <= dst_mtu(&rt->dst) &&
+	     ip_dont_fragment(sk, &rt->dst)))
 		df = htons(IP_DF);
 
 	if (inet->cork.flags & IPCORK_OPT)
@@ -1284,7 +1285,7 @@ int ip_push_pending_frames(struct sock *sk)
 	if (rt->rt_type == RTN_MULTICAST)
 		ttl = inet->mc_ttl;
 	else
-		ttl = ip_select_ttl(inet, &rt->u.dst);
+		ttl = ip_select_ttl(inet, &rt->dst);
 
 	iph = (struct iphdr *)skb->data;
 	iph->version = 4;
@@ -1295,7 +1296,7 @@ int ip_push_pending_frames(struct sock *sk)
 	}
 	iph->tos = inet->tos;
 	iph->frag_off = df;
-	ip_select_ident(iph, &rt->u.dst, sk);
+	ip_select_ident(iph, &rt->dst, sk);
 	iph->ttl = ttl;
 	iph->protocol = sk->sk_protocol;
 	iph->saddr = rt->rt_src;
@@ -1308,7 +1309,7 @@ int ip_push_pending_frames(struct sock *sk)
 	 * on dst refcount
 	 */
 	inet->cork.dst = NULL;
-	skb_dst_set(skb, &rt->u.dst);
+	skb_dst_set(skb, &rt->dst);
 
 	if (iph->protocol == IPPROTO_ICMP)
 		icmp_out_count(net, ((struct icmphdr *)
@@ -1445,7 +1446,3 @@ void __init ip_init(void)
 	igmp_mc_proc_init();
 #endif
 }
-
-EXPORT_SYMBOL(ip_generic_getfrag);
-EXPORT_SYMBOL(ip_queue_xmit);
-EXPORT_SYMBOL(ip_send_check);