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);
}
static int __lro_proc_skb(struct net_lro_mgr *lro_mgr, struct sk_buff *skb,
struct vlan_group *vgrp, u16 vlan_tag, void *priv)
{
struct net_lro_desc *lro_desc;
struct iphdr *iph;
struct tcphdr *tcph;
u64 flags;
int vlan_hdr_len = 0;
if (!lro_mgr->get_skb_header
|| lro_mgr->get_skb_header(skb, (void *)&iph, (void *)&tcph,
&flags, priv))
goto out;
if (!(flags & LRO_IPV4) || !(flags & LRO_TCP))
goto out;
lro_desc = lro_get_desc(lro_mgr, lro_mgr->lro_arr, iph, tcph);
if (!lro_desc)
goto out;
if ((skb->protocol == htons(ETH_P_8021Q))
&& !(lro_mgr->features & LRO_F_EXTRACT_VLAN_ID))
vlan_hdr_len = VLAN_HLEN;
if (!lro_desc->active) { /* start new lro session */
if (lro_tcp_ip_check(iph, tcph, skb->len - vlan_hdr_len, NULL))
goto out;
skb->ip_summed = lro_mgr->ip_summed_aggr;
lro_init_desc(lro_desc, skb, iph, tcph, vlan_tag, vgrp);
LRO_INC_STATS(lro_mgr, aggregated);
return 0;
}
if (lro_desc->tcp_next_seq != ntohl(tcph->seq))
goto out2;
if (lro_tcp_ip_check(iph, tcph, skb->len, lro_desc))
goto out2;
lro_add_packet(lro_desc, skb, iph, tcph);
LRO_INC_STATS(lro_mgr, aggregated);
if ((lro_desc->pkt_aggr_cnt >= lro_mgr->max_aggr) ||
lro_desc->parent->len > (0xFFFF - lro_mgr->dev->mtu))
lro_flush(lro_mgr, lro_desc);
return 0;
out2: /* send aggregated SKBs to stack */
lro_flush(lro_mgr, lro_desc);
out: /* Original SKB has to be posted to stack */
skb->ip_summed = lro_mgr->ip_summed;
return 1;
}
static struct sk_buff *__lro_proc_segment(struct net_lro_mgr *lro_mgr,
struct skb_frag_struct *frags,
int len, int true_size,
struct vlan_group *vgrp,
u16 vlan_tag, 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 = page_address(frags->page) + frags->page_offset;
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, 0, NULL);
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;
}
static int __lro_proc_skb(struct net_lro_mgr *lro_mgr, struct sk_buff *skb,
void *priv)
{
struct net_lro_desc *lro_desc;
struct iphdr *iph;
struct tcphdr *tcph;
u64 flags;
int vlan_hdr_len = 0;
#if defined(CONFIG_MV_ETHERNET) && defined(CONFIG_ARCH_FEROCEON)
/* Only BSP net driver has this request(No this call back but support LRO...) */
/*
if (!lro_mgr->get_skb_header
|| lro_mgr->get_skb_header(skb, (void *)&iph, (void *)&tcph,
&flags, priv))
goto out;
*/
if (!lro_mgr->get_skb_header) {
skb_reset_network_header(skb);
skb_set_transport_header(skb, ip_hdrlen(skb));
iph = ip_hdr(skb);
tcph = tcp_hdr(skb);
flags = LRO_IPV4 | LRO_TCP;
}
else if (lro_mgr->get_skb_header(skb, (void *)&iph, (void *)&tcph,
&flags, priv))
goto out;
#else
if (!lro_mgr->get_skb_header
|| lro_mgr->get_skb_header(skb, (void *)&iph, (void *)&tcph,
&flags, priv))
goto out;
#endif
if (!(flags & LRO_IPV4) || !(flags & LRO_TCP))
goto out;
lro_desc = lro_get_desc(lro_mgr, lro_mgr->lro_arr, iph, tcph);
if (!lro_desc)
goto out;
if ((skb->protocol == htons(ETH_P_8021Q)) &&
!(lro_mgr->features & LRO_F_EXTRACT_VLAN_ID))
vlan_hdr_len = VLAN_HLEN;
if (!lro_desc->active) { /* start new lro session */
if (lro_tcp_ip_check(iph, tcph, skb->len - vlan_hdr_len, NULL))
goto out;
skb->ip_summed = lro_mgr->ip_summed_aggr;
lro_init_desc(lro_desc, skb, iph, tcph);
LRO_INC_STATS(lro_mgr, aggregated);
return 0;
}
if (lro_desc->tcp_next_seq != ntohl(tcph->seq))
goto out2;
if (lro_tcp_ip_check(iph, tcph, skb->len, lro_desc))
goto out2;
lro_add_packet(lro_desc, skb, iph, tcph);
LRO_INC_STATS(lro_mgr, aggregated);
if ((lro_desc->pkt_aggr_cnt >= lro_mgr->max_aggr) ||
lro_desc->parent->len > (0xFFFF - lro_mgr->dev->mtu))
lro_flush(lro_mgr, lro_desc);
return 0;
out2: /* send aggregated SKBs to stack */
lro_flush(lro_mgr, lro_desc);
out:
return 1;
}