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net: Remove gso_send_check as an offload callback

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The send_check logic was only interesting in cases of TCP offload and
UDP UFO where the checksum needed to be initialized to the pseudo
header checksum. Now we've moved that logic into the related
gso_segment functions so gso_send_check is no longer needed.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2014-09-20 14:52:30 -07:00 committed by David S. Miller
parent f71470b37e
commit 53e5039896
10 changed files with 3 additions and 113 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/netdevice.h
View File

@ -1911,7 +1911,6 @@ struct packet_type {
struct offload_callbacks {
struct sk_buff *(*gso_segment)(struct sk_buff *skb,
netdev_features_t features);
int (*gso_send_check)(struct sk_buff *skb);
struct sk_buff **(*gro_receive)(struct sk_buff **head,
struct sk_buff *skb);
int (*gro_complete)(struct sk_buff *skb, int nhoff);

10
net/core/dev.c
View File

@ -2422,16 +2422,6 @@ struct sk_buff *skb_mac_gso_segment(struct sk_buff *skb,
rcu_read_lock();
list_for_each_entry_rcu(ptype, &offload_base, list) {
if (ptype->type == type && ptype->callbacks.gso_segment) {
if (unlikely(skb->ip_summed != CHECKSUM_PARTIAL)) {
int err;
err = ptype->callbacks.gso_send_check(skb);
segs = ERR_PTR(err);
if (err || skb_gso_ok(skb, features))
break;
__skb_push(skb, (skb->data -
skb_network_header(skb)));
}
segs = ptype->callbacks.gso_segment(skb, features);
break;
}

36
net/ipv4/af_inet.c
View File

@ -1197,40 +1197,6 @@ int inet_sk_rebuild_header(struct sock *sk)
}
EXPORT_SYMBOL(inet_sk_rebuild_header);
static int inet_gso_send_check(struct sk_buff *skb)
{
const struct net_offload *ops;
const struct iphdr *iph;
int proto;
int ihl;
int err = -EINVAL;
if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
goto out;
iph = ip_hdr(skb);
ihl = iph->ihl * 4;
if (ihl < sizeof(*iph))
goto out;
proto = iph->protocol;
/* Warning: after this point, iph might be no longer valid */
if (unlikely(!pskb_may_pull(skb, ihl)))
goto out;
__skb_pull(skb, ihl);
skb_reset_transport_header(skb);
err = -EPROTONOSUPPORT;
ops = rcu_dereference(inet_offloads[proto]);
if (likely(ops && ops->callbacks.gso_send_check))
err = ops->callbacks.gso_send_check(skb);
out:
return err;
}
static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
@ -1655,7 +1621,6 @@ static int ipv4_proc_init(void);
static struct packet_offload ip_packet_offload __read_mostly = {
.type = cpu_to_be16(ETH_P_IP),
.callbacks = {
.gso_send_check = inet_gso_send_check,
.gso_segment = inet_gso_segment,
.gro_receive = inet_gro_receive,
.gro_complete = inet_gro_complete,
@ -1664,7 +1629,6 @@ static struct packet_offload ip_packet_offload __read_mostly = {
static const struct net_offload ipip_offload = {
.callbacks = {
.gso_send_check = inet_gso_send_check,
.gso_segment = inet_gso_segment,
.gro_receive = inet_gro_receive,
.gro_complete = inet_gro_complete,

11
net/ipv4/gre_offload.c
View File

@ -15,13 +15,6 @@
#include <net/protocol.h>
#include <net/gre.h>
static int gre_gso_send_check(struct sk_buff *skb)
{
if (!skb->encapsulation)
return -EINVAL;
return 0;
}
static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
@ -46,6 +39,9 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb,
SKB_GSO_IPIP)))
goto out;
if (!skb->encapsulation)
goto out;
if (unlikely(!pskb_may_pull(skb, sizeof(*greh))))
goto out;
@ -256,7 +252,6 @@ static int gre_gro_complete(struct sk_buff *skb, int nhoff)
static const struct net_offload gre_offload = {
.callbacks = {
.gso_send_check = gre_gso_send_check,
.gso_segment = gre_gso_segment,
.gro_receive = gre_gro_receive,
.gro_complete = gre_gro_complete,

6
net/ipv4/tcp_offload.c
View File

@ -288,11 +288,6 @@ int tcp_gro_complete(struct sk_buff *skb)
}
EXPORT_SYMBOL(tcp_gro_complete);
static int tcp_v4_gso_send_check(struct sk_buff *skb)
{
return 0;
}
static struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb)
{
/* Don't bother verifying checksum if we're going to flush anyway. */
@ -320,7 +315,6 @@ static int tcp4_gro_complete(struct sk_buff *skb, int thoff)
static const struct net_offload tcpv4_offload = {
.callbacks = {
.gso_send_check = tcp_v4_gso_send_check,
.gso_segment = tcp4_gso_segment,
.gro_receive = tcp4_gro_receive,
.gro_complete = tcp4_gro_complete,

6
net/ipv4/udp_offload.c
View File

@ -25,11 +25,6 @@ struct udp_offload_priv {
struct udp_offload_priv __rcu *next;
};
static int udp4_ufo_send_check(struct sk_buff *skb)
{
return 0;
}
struct sk_buff *skb_udp_tunnel_segment(struct sk_buff *skb,
netdev_features_t features)
{
@ -346,7 +341,6 @@ static int udp4_gro_complete(struct sk_buff *skb, int nhoff)
static const struct net_offload udpv4_offload = {
.callbacks = {
.gso_send_check = udp4_ufo_send_check,
.gso_segment = udp4_ufo_fragment,
.gro_receive = udp4_gro_receive,
.gro_complete = udp4_gro_complete,

27
net/ipv6/ip6_offload.c
View File

@ -53,31 +53,6 @@ static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
return proto;
}
static int ipv6_gso_send_check(struct sk_buff *skb)
{
const struct ipv6hdr *ipv6h;
const struct net_offload *ops;
int err = -EINVAL;
if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
goto out;
ipv6h = ipv6_hdr(skb);
__skb_pull(skb, sizeof(*ipv6h));
err = -EPROTONOSUPPORT;
ops = rcu_dereference(inet6_offloads[
ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
if (likely(ops && ops->callbacks.gso_send_check)) {
skb_reset_transport_header(skb);
err = ops->callbacks.gso_send_check(skb);
}
out:
return err;
}
static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
@ -306,7 +281,6 @@ out_unlock:
static struct packet_offload ipv6_packet_offload __read_mostly = {
.type = cpu_to_be16(ETH_P_IPV6),
.callbacks = {
.gso_send_check = ipv6_gso_send_check,
.gso_segment = ipv6_gso_segment,
.gro_receive = ipv6_gro_receive,
.gro_complete = ipv6_gro_complete,
@ -315,7 +289,6 @@ static struct packet_offload ipv6_packet_offload __read_mostly = {
static const struct net_offload sit_offload = {
.callbacks = {
.gso_send_check = ipv6_gso_send_check,
.gso_segment = ipv6_gso_segment,
.gro_receive = ipv6_gro_receive,
.gro_complete = ipv6_gro_complete,

6
net/ipv6/tcpv6_offload.c
View File

@ -15,11 +15,6 @@
#include <net/ip6_checksum.h>
#include "ip6_offload.h"
static int tcp_v6_gso_send_check(struct sk_buff *skb)
{
return 0;
}
static struct sk_buff **tcp6_gro_receive(struct sk_buff **head,
struct sk_buff *skb)
{
@ -71,7 +66,6 @@ struct sk_buff *tcp6_gso_segment(struct sk_buff *skb,
}
static const struct net_offload tcpv6_offload = {
.callbacks = {
.gso_send_check = tcp_v6_gso_send_check,
.gso_segment = tcp6_gso_segment,
.gro_receive = tcp6_gro_receive,
.gro_complete = tcp6_gro_complete,

6
net/ipv6/udp_offload.c
View File

@ -17,11 +17,6 @@
#include <net/ip6_checksum.h>
#include "ip6_offload.h"
static int udp6_ufo_send_check(struct sk_buff *skb)
{
return 0;
}
static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
netdev_features_t features)
{
@ -166,7 +161,6 @@ static int udp6_gro_complete(struct sk_buff *skb, int nhoff)
static const struct net_offload udpv6_offload = {
.callbacks = {
.gso_send_check = udp6_ufo_send_check,
.gso_segment = udp6_ufo_fragment,
.gro_receive = udp6_gro_receive,
.gro_complete = udp6_gro_complete,

7
net/mpls/mpls_gso.c
View File

@ -65,15 +65,9 @@ out:
return segs;
}
static int mpls_gso_send_check(struct sk_buff *skb)
{
return 0;
}
static struct packet_offload mpls_mc_offload = {
.type = cpu_to_be16(ETH_P_MPLS_MC),
.callbacks = {
.gso_send_check = mpls_gso_send_check,
.gso_segment = mpls_gso_segment,
},
};
@ -81,7 +75,6 @@ static struct packet_offload mpls_mc_offload = {
static struct packet_offload mpls_uc_offload = {
.type = cpu_to_be16(ETH_P_MPLS_UC),
.callbacks = {
.gso_send_check = mpls_gso_send_check,
.gso_segment = mpls_gso_segment,
},
};