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path: root/net/ipv6/ip6_offload.c
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Diffstat (limited to 'net/ipv6/ip6_offload.c')
-rw-r--r--net/ipv6/ip6_offload.c94
1 files changed, 68 insertions, 26 deletions
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index 82e9f3076..22e90e56b 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -16,6 +16,7 @@
#include <net/protocol.h>
#include <net/ipv6.h>
+#include <net/inet_common.h>
#include "ip6_offload.h"
@@ -63,27 +64,12 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
int proto;
struct frag_hdr *fptr;
unsigned int unfrag_ip6hlen;
+ unsigned int payload_len;
u8 *prevhdr;
int offset = 0;
bool encap, udpfrag;
int nhoff;
- if (unlikely(skb_shinfo(skb)->gso_type &
- ~(SKB_GSO_TCPV4 |
- SKB_GSO_UDP |
- SKB_GSO_DODGY |
- SKB_GSO_TCP_ECN |
- SKB_GSO_GRE |
- SKB_GSO_GRE_CSUM |
- SKB_GSO_IPIP |
- SKB_GSO_SIT |
- SKB_GSO_UDP_TUNNEL |
- SKB_GSO_UDP_TUNNEL_CSUM |
- SKB_GSO_TUNNEL_REMCSUM |
- SKB_GSO_TCPV6 |
- 0)))
- goto out;
-
skb_reset_network_header(skb);
nhoff = skb_network_header(skb) - skb_mac_header(skb);
if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
@@ -101,7 +87,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
if (skb->encapsulation &&
- skb_shinfo(skb)->gso_type & (SKB_GSO_SIT|SKB_GSO_IPIP))
+ skb_shinfo(skb)->gso_type & (SKB_GSO_IPXIP4 | SKB_GSO_IPXIP6))
udpfrag = proto == IPPROTO_UDP && encap;
else
udpfrag = proto == IPPROTO_UDP && !skb->encapsulation;
@@ -117,7 +103,13 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
for (skb = segs; skb; skb = skb->next) {
ipv6h = (struct ipv6hdr *)(skb_mac_header(skb) + nhoff);
- ipv6h->payload_len = htons(skb->len - nhoff - sizeof(*ipv6h));
+ if (skb_is_gso(skb))
+ payload_len = skb_shinfo(skb)->gso_size +
+ SKB_GSO_CB(skb)->data_offset +
+ skb->head - (unsigned char *)(ipv6h + 1);
+ else
+ payload_len = skb->len - nhoff - sizeof(*ipv6h);
+ ipv6h->payload_len = htons(payload_len);
skb->network_header = (u8 *)ipv6h - skb->head;
if (udpfrag) {
@@ -239,10 +231,14 @@ static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
NAPI_GRO_CB(p)->flush |= !!(first_word & htonl(0x0FF00000));
NAPI_GRO_CB(p)->flush |= flush;
- /* Clear flush_id, there's really no concept of ID in IPv6. */
- NAPI_GRO_CB(p)->flush_id = 0;
+ /* If the previous IP ID value was based on an atomic
+ * datagram we can overwrite the value and ignore it.
+ */
+ if (NAPI_GRO_CB(skb)->is_atomic)
+ NAPI_GRO_CB(p)->flush_id = 0;
}
+ NAPI_GRO_CB(skb)->is_atomic = true;
NAPI_GRO_CB(skb)->flush |= flush;
skb_gro_postpull_rcsum(skb, iph, nlen);
@@ -258,9 +254,11 @@ out:
return pp;
}
-static struct sk_buff **sit_gro_receive(struct sk_buff **head,
- struct sk_buff *skb)
+static struct sk_buff **sit_ip6ip6_gro_receive(struct sk_buff **head,
+ struct sk_buff *skb)
{
+ /* Common GRO receive for SIT and IP6IP6 */
+
if (NAPI_GRO_CB(skb)->encap_mark) {
NAPI_GRO_CB(skb)->flush = 1;
return NULL;
@@ -271,6 +269,21 @@ static struct sk_buff **sit_gro_receive(struct sk_buff **head,
return ipv6_gro_receive(head, skb);
}
+static struct sk_buff **ip4ip6_gro_receive(struct sk_buff **head,
+ struct sk_buff *skb)
+{
+ /* Common GRO receive for SIT and IP6IP6 */
+
+ if (NAPI_GRO_CB(skb)->encap_mark) {
+ NAPI_GRO_CB(skb)->flush = 1;
+ return NULL;
+ }
+
+ NAPI_GRO_CB(skb)->encap_mark = 1;
+
+ return inet_gro_receive(head, skb);
+}
+
static int ipv6_gro_complete(struct sk_buff *skb, int nhoff)
{
const struct net_offload *ops;
@@ -299,10 +312,24 @@ out_unlock:
static int sit_gro_complete(struct sk_buff *skb, int nhoff)
{
skb->encapsulation = 1;
- skb_shinfo(skb)->gso_type |= SKB_GSO_SIT;
+ skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP4;
+ return ipv6_gro_complete(skb, nhoff);
+}
+
+static int ip6ip6_gro_complete(struct sk_buff *skb, int nhoff)
+{
+ skb->encapsulation = 1;
+ skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP6;
return ipv6_gro_complete(skb, nhoff);
}
+static int ip4ip6_gro_complete(struct sk_buff *skb, int nhoff)
+{
+ skb->encapsulation = 1;
+ skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP6;
+ return inet_gro_complete(skb, nhoff);
+}
+
static struct packet_offload ipv6_packet_offload __read_mostly = {
.type = cpu_to_be16(ETH_P_IPV6),
.callbacks = {
@@ -315,24 +342,39 @@ static struct packet_offload ipv6_packet_offload __read_mostly = {
static const struct net_offload sit_offload = {
.callbacks = {
.gso_segment = ipv6_gso_segment,
- .gro_receive = sit_gro_receive,
+ .gro_receive = sit_ip6ip6_gro_receive,
.gro_complete = sit_gro_complete,
},
};
+static const struct net_offload ip4ip6_offload = {
+ .callbacks = {
+ .gso_segment = inet_gso_segment,
+ .gro_receive = ip4ip6_gro_receive,
+ .gro_complete = ip4ip6_gro_complete,
+ },
+};
+
+static const struct net_offload ip6ip6_offload = {
+ .callbacks = {
+ .gso_segment = ipv6_gso_segment,
+ .gro_receive = sit_ip6ip6_gro_receive,
+ .gro_complete = ip6ip6_gro_complete,
+ },
+};
static int __init ipv6_offload_init(void)
{
if (tcpv6_offload_init() < 0)
pr_crit("%s: Cannot add TCP protocol offload\n", __func__);
- if (udp_offload_init() < 0)
- pr_crit("%s: Cannot add UDP protocol offload\n", __func__);
if (ipv6_exthdrs_offload_init() < 0)
pr_crit("%s: Cannot add EXTHDRS protocol offload\n", __func__);
dev_add_offload(&ipv6_packet_offload);
inet_add_offload(&sit_offload, IPPROTO_IPV6);
+ inet6_add_offload(&ip6ip6_offload, IPPROTO_IPV6);
+ inet6_add_offload(&ip4ip6_offload, IPPROTO_IPIP);
return 0;
}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-09 05:28:40 +0000