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Commit 24245a1b authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

lro: remove dead code 



Remove leftover code that is not used anywhere in current tree.

Signed-off-by: default avatarStephen Hemminger <stephen@networkplumber.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent da131ddb

include/linux/inet_lro.h

+0 −23
Original line number Diff line number Diff line
@@ -133,33 +133,10 @@ struct net_lro_mgr { 
void lro_receive_skb(struct net_lro_mgr *lro_mgr,

		     struct sk_buff *skb,

		     void *priv);



/*

 * Processes a fragment list

 *

 * This functions aggregate fragments and generate SKBs do pass

 * the packets to the stack.

 *

 * @lro_mgr: LRO manager to use

 * @frags: Fragment to be processed. Must contain entire header in first

 *         element.

 * @len: Length of received data

 * @true_size: Actual size of memory the fragment is consuming

 * @priv: Private data that may be used by driver functions

 *        (for example get_tcp_ip_hdr)

 */



void lro_receive_frags(struct net_lro_mgr *lro_mgr,

		       struct skb_frag_struct *frags,

		       int len, int true_size, void *priv, __wsum sum);



/*

 * Forward all aggregated SKBs held by lro_mgr to network stack

 */



void lro_flush_all(struct net_lro_mgr *lro_mgr);



void lro_flush_pkt(struct net_lro_mgr *lro_mgr,

		   struct iphdr *iph, struct tcphdr *tcph);



#endif

net/ipv4/inet_lro.c

+0 −173
Original line number Diff line number Diff line
@@ -230,29 +230,6 @@ static void lro_add_packet(struct net_lro_desc *lro_desc, struct sk_buff *skb, 
	lro_desc->last_skb = skb;

}



static void lro_add_frags(struct net_lro_desc *lro_desc,

			  int len, int hlen, int truesize,

			  struct skb_frag_struct *skb_frags,

			  struct iphdr *iph, struct tcphdr *tcph)

{

	struct sk_buff *skb = lro_desc->parent;

	int tcp_data_len = TCP_PAYLOAD_LENGTH(iph, tcph);



	lro_add_common(lro_desc, iph, tcph, tcp_data_len);



	skb->truesize += truesize;



	skb_frags[0].page_offset += hlen;

	skb_frag_size_sub(&skb_frags[0], hlen);



	while (tcp_data_len > 0) {

		*(lro_desc->next_frag) = *skb_frags;

		tcp_data_len -= skb_frag_size(skb_frags);

		lro_desc->next_frag++;

		skb_frags++;

		skb_shinfo(skb)->nr_frags++;

	}

}



static int lro_check_tcp_conn(struct net_lro_desc *lro_desc,

			      struct iphdr *iph,
@@ -371,128 +348,6 @@ static int __lro_proc_skb(struct net_lro_mgr *lro_mgr, struct sk_buff *skb, 
	return 1;

}





static struct sk_buff *lro_gen_skb(struct net_lro_mgr *lro_mgr,

				   struct skb_frag_struct *frags,

				   int len, int true_size,

				   void *mac_hdr,

				   int hlen, __wsum sum,

				   u32 ip_summed)

{

	struct sk_buff *skb;

	struct skb_frag_struct *skb_frags;

	int data_len = len;

	int hdr_len = min(len, hlen);



	skb = netdev_alloc_skb(lro_mgr->dev, hlen + lro_mgr->frag_align_pad);

	if (!skb)

		return NULL;



	skb_reserve(skb, lro_mgr->frag_align_pad);

	skb->len = len;

	skb->data_len = len - hdr_len;

	skb->truesize += true_size;

	skb->tail += hdr_len;



	memcpy(skb->data, mac_hdr, hdr_len);



	skb_frags = skb_shinfo(skb)->frags;

	while (data_len > 0) {

		*skb_frags = *frags;

		data_len -= skb_frag_size(frags);

		skb_frags++;

		frags++;

		skb_shinfo(skb)->nr_frags++;

	}



	skb_shinfo(skb)->frags[0].page_offset += hdr_len;

	skb_frag_size_sub(&skb_shinfo(skb)->frags[0], hdr_len);



	skb->ip_summed = ip_summed;

	skb->csum = sum;

	skb->protocol = eth_type_trans(skb, lro_mgr->dev);

	return skb;

}



static struct sk_buff *__lro_proc_segment(struct net_lro_mgr *lro_mgr,

					  struct skb_frag_struct *frags,

					  int len, int true_size,

					  void *priv, __wsum sum)

{

	struct net_lro_desc *lro_desc;

	struct iphdr *iph;

	struct tcphdr *tcph;

	struct sk_buff *skb;

	u64 flags;

	void *mac_hdr;

	int mac_hdr_len;

	int hdr_len = LRO_MAX_PG_HLEN;

	int vlan_hdr_len = 0;



	if (!lro_mgr->get_frag_header ||

	    lro_mgr->get_frag_header(frags, (void *)&mac_hdr, (void *)&iph,

				     (void *)&tcph, &flags, priv)) {

		mac_hdr = skb_frag_address(frags);

		goto out1;

	}



	if (!(flags & LRO_IPV4) || !(flags & LRO_TCP))

		goto out1;



	hdr_len = (int)((void *)(tcph) + TCP_HDR_LEN(tcph) - mac_hdr);

	mac_hdr_len = (int)((void *)(iph) - mac_hdr);



	lro_desc = lro_get_desc(lro_mgr, lro_mgr->lro_arr, iph, tcph);

	if (!lro_desc)

		goto out1;



	if (!lro_desc->active) { /* start new lro session */

		if (lro_tcp_ip_check(iph, tcph, len - mac_hdr_len, NULL))

			goto out1;



		skb = lro_gen_skb(lro_mgr, frags, len, true_size, mac_hdr,

				  hdr_len, 0, lro_mgr->ip_summed_aggr);

		if (!skb)

			goto out;



		if ((skb->protocol == htons(ETH_P_8021Q)) &&

		    !(lro_mgr->features & LRO_F_EXTRACT_VLAN_ID))

			vlan_hdr_len = VLAN_HLEN;



		iph = (void *)(skb->data + vlan_hdr_len);

		tcph = (void *)((u8 *)skb->data + vlan_hdr_len

				+ IP_HDR_LEN(iph));



		lro_init_desc(lro_desc, skb, iph, tcph);

		LRO_INC_STATS(lro_mgr, aggregated);

		return NULL;

	}



	if (lro_desc->tcp_next_seq != ntohl(tcph->seq))

		goto out2;



	if (lro_tcp_ip_check(iph, tcph, len - mac_hdr_len, lro_desc))

		goto out2;



	lro_add_frags(lro_desc, len, hdr_len, true_size, frags, iph, tcph);

	LRO_INC_STATS(lro_mgr, aggregated);



	if ((skb_shinfo(lro_desc->parent)->nr_frags >= lro_mgr->max_aggr) ||

	    lro_desc->parent->len > (0xFFFF - lro_mgr->dev->mtu))

		lro_flush(lro_mgr, lro_desc);



	return NULL;



out2: /* send aggregated packets to the stack */

	lro_flush(lro_mgr, lro_desc);



out1:  /* Original packet has to be posted to the stack */

	skb = lro_gen_skb(lro_mgr, frags, len, true_size, mac_hdr,

			  hdr_len, sum, lro_mgr->ip_summed);

out:

	return skb;

}



void lro_receive_skb(struct net_lro_mgr *lro_mgr,

		     struct sk_buff *skb,

		     void *priv)
@@ -506,23 +361,6 @@ void lro_receive_skb(struct net_lro_mgr *lro_mgr, 
}

EXPORT_SYMBOL(lro_receive_skb);



void lro_receive_frags(struct net_lro_mgr *lro_mgr,

		       struct skb_frag_struct *frags,

		       int len, int true_size, void *priv, __wsum sum)

{

	struct sk_buff *skb;



	skb = __lro_proc_segment(lro_mgr, frags, len, true_size, priv, sum);

	if (!skb)

		return;



	if (lro_mgr->features & LRO_F_NAPI)

		netif_receive_skb(skb);

	else

		netif_rx(skb);

}

EXPORT_SYMBOL(lro_receive_frags);



void lro_flush_all(struct net_lro_mgr *lro_mgr)

{

	int i;
@@ -534,14 +372,3 @@ void lro_flush_all(struct net_lro_mgr *lro_mgr) 
	}

}

EXPORT_SYMBOL(lro_flush_all);
 


void lro_flush_pkt(struct net_lro_mgr *lro_mgr,

		  struct iphdr *iph, struct tcphdr *tcph)

{

	struct net_lro_desc *lro_desc;



	lro_desc = lro_get_desc(lro_mgr, lro_mgr->lro_arr, iph, tcph);

	if (lro_desc->active)

		lro_flush(lro_mgr, lro_desc);

}

EXPORT_SYMBOL(lro_flush_pkt);