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ipvs: allow transmit of GRO aggregated skbs

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Attempt at allowing LVS to transmit skbs of greater than MTU length that
have been aggregated by GRO and can thus be deaggregated by GSO.

Cc: Julian Anastasov <ja@ssi.bg>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Simon Horman
2010-11-09 10:08:49 +09:00
parent a333e2ec05
commit 8f1b03a4c1
1 changed files with 15 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

25
net/netfilter/ipvs/ip_vs_xmit.c
View File

@@ -407,7 +407,8 @@ ip_vs_bypass_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* MTU checking */ /* MTU checking */
mtu = dst_mtu(&rt->dst); mtu = dst_mtu(&rt->dst);
if ((skb->len > mtu) && (iph->frag_off & htons(IP_DF))) { if ((skb->len > mtu) && (iph->frag_off & htons(IP_DF)) &&
!skb_is_gso(skb)) {
ip_rt_put(rt); ip_rt_put(rt);
icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu)); icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
IP_VS_DBG_RL("%s(): frag needed\n", __func__); IP_VS_DBG_RL("%s(): frag needed\n", __func__);
@@ -460,7 +461,7 @@ ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
/* MTU checking */ /* MTU checking */
mtu = dst_mtu(&rt->dst); mtu = dst_mtu(&rt->dst);
if (skb->len > mtu) { if (skb->len > mtu && !skb_is_gso(skb)) {
if (!skb->dev) { if (!skb->dev) {
struct net *net = dev_net(skb_dst(skb)->dev); struct net *net = dev_net(skb_dst(skb)->dev);
@@ -560,7 +561,8 @@ ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* MTU checking */ /* MTU checking */
mtu = dst_mtu(&rt->dst); mtu = dst_mtu(&rt->dst);
if ((skb->len > mtu) && (iph->frag_off & htons(IP_DF))) { if ((skb->len > mtu) && (iph->frag_off & htons(IP_DF)) &&
!skb_is_gso(skb)) {
icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu)); icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
IP_VS_DBG_RL_PKT(0, AF_INET, pp, skb, 0, IP_VS_DBG_RL_PKT(0, AF_INET, pp, skb, 0,
"ip_vs_nat_xmit(): frag needed for"); "ip_vs_nat_xmit(): frag needed for");
@@ -675,7 +677,7 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
/* MTU checking */ /* MTU checking */
mtu = dst_mtu(&rt->dst); mtu = dst_mtu(&rt->dst);
if (skb->len > mtu) { if (skb->len > mtu && !skb_is_gso(skb)) {
if (!skb->dev) { if (!skb->dev) {
struct net *net = dev_net(skb_dst(skb)->dev); struct net *net = dev_net(skb_dst(skb)->dev);
@@ -790,8 +792,8 @@ ip_vs_tunnel_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
df |= (old_iph->frag_off & htons(IP_DF)); df |= (old_iph->frag_off & htons(IP_DF));
if ((old_iph->frag_off & htons(IP_DF)) if ((old_iph->frag_off & htons(IP_DF) &&
&& mtu < ntohs(old_iph->tot_len)) { mtu < ntohs(old_iph->tot_len) && !skb_is_gso(skb))) {
icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu)); icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
IP_VS_DBG_RL("%s(): frag needed\n", __func__); IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error_put; goto tx_error_put;
@@ -903,7 +905,8 @@ ip_vs_tunnel_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
if (skb_dst(skb)) if (skb_dst(skb))
skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu); skb_dst(skb)->ops->update_pmtu(skb_dst(skb), mtu);
if (mtu < ntohs(old_iph->payload_len) + sizeof(struct ipv6hdr)) { if (mtu < ntohs(old_iph->payload_len) + sizeof(struct ipv6hdr) &&
!skb_is_gso(skb)) {
if (!skb->dev) { if (!skb->dev) {
struct net *net = dev_net(skb_dst(skb)->dev); struct net *net = dev_net(skb_dst(skb)->dev);
@@ -1008,7 +1011,8 @@ ip_vs_dr_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* MTU checking */ /* MTU checking */
mtu = dst_mtu(&rt->dst); mtu = dst_mtu(&rt->dst);
if ((iph->frag_off & htons(IP_DF)) && skb->len > mtu) { if ((iph->frag_off & htons(IP_DF)) && skb->len > mtu &&
!skb_is_gso(skb)) {
icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu)); icmp_send(skb, ICMP_DEST_UNREACH,ICMP_FRAG_NEEDED, htonl(mtu));
ip_rt_put(rt); ip_rt_put(rt);
IP_VS_DBG_RL("%s(): frag needed\n", __func__); IP_VS_DBG_RL("%s(): frag needed\n", __func__);
@@ -1175,7 +1179,8 @@ ip_vs_icmp_xmit(struct sk_buff *skb, struct ip_vs_conn *cp,
/* MTU checking */ /* MTU checking */
mtu = dst_mtu(&rt->dst); mtu = dst_mtu(&rt->dst);
if ((skb->len > mtu) && (ip_hdr(skb)->frag_off & htons(IP_DF))) { if ((skb->len > mtu) && (ip_hdr(skb)->frag_off & htons(IP_DF)) &&
!skb_is_gso(skb)) {
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu)); icmp_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED, htonl(mtu));
IP_VS_DBG_RL("%s(): frag needed\n", __func__); IP_VS_DBG_RL("%s(): frag needed\n", __func__);
goto tx_error_put; goto tx_error_put;
@@ -1289,7 +1294,7 @@ ip_vs_icmp_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp,
/* MTU checking */ /* MTU checking */
mtu = dst_mtu(&rt->dst); mtu = dst_mtu(&rt->dst);
if (skb->len > mtu) { if (skb->len > mtu && !skb_is_gso(skb)) {
if (!skb->dev) { if (!skb->dev) {
struct net *net = dev_net(skb_dst(skb)->dev); struct net *net = dev_net(skb_dst(skb)->dev);