Contributors: 37
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Steffen Klassert |
1268 |
59.67% |
16 |
17.58% |
| Xin Long |
213 |
10.02% |
5 |
5.49% |
| Herbert Xu |
140 |
6.59% |
15 |
16.48% |
| Yossi Kuperman |
113 |
5.32% |
1 |
1.10% |
| Florian Westphal |
94 |
4.42% |
4 |
4.40% |
| Linus Torvalds (pre-git) |
31 |
1.46% |
7 |
7.69% |
| Kazunori Miyazawa |
28 |
1.32% |
1 |
1.10% |
| Sabrina Dubroca |
28 |
1.32% |
2 |
2.20% |
| Christian Langrock |
17 |
0.80% |
1 |
1.10% |
| Sebastian Andrzej Siewior |
16 |
0.75% |
1 |
1.10% |
| Hideaki Yoshifuji / 吉藤英明 |
15 |
0.71% |
2 |
2.20% |
| Alexey Kuznetsov |
15 |
0.71% |
2 |
2.20% |
| Ilan Tayari |
14 |
0.66% |
3 |
3.30% |
| Ulrich Weber |
13 |
0.61% |
1 |
1.10% |
| Masahide Nakamura |
11 |
0.52% |
2 |
2.20% |
| Jamal Hadi Salim |
11 |
0.52% |
1 |
1.10% |
| Alexander Duyck |
11 |
0.52% |
2 |
2.20% |
| Shannon Nelson |
9 |
0.42% |
1 |
1.10% |
| Patrick McHardy |
8 |
0.38% |
1 |
1.10% |
| Alexey Dobriyan |
6 |
0.28% |
1 |
1.10% |
| Huy Nguyen |
6 |
0.28% |
1 |
1.10% |
| Sridhar Samudrala |
6 |
0.28% |
1 |
1.10% |
| Arnaldo Carvalho de Melo |
6 |
0.28% |
3 |
3.30% |
| Eric Dumazet |
6 |
0.28% |
2 |
2.20% |
| Rusty Russell |
5 |
0.24% |
1 |
1.10% |
| Myungho Jung |
5 |
0.24% |
1 |
1.10% |
| Willem de Bruijn |
5 |
0.24% |
1 |
1.10% |
| Rob Gill |
5 |
0.24% |
1 |
1.10% |
| Mathias Krause |
4 |
0.19% |
1 |
1.10% |
| David S. Miller |
3 |
0.14% |
2 |
2.20% |
| James Chapman |
3 |
0.14% |
1 |
1.10% |
| Linus Torvalds |
3 |
0.14% |
2 |
2.20% |
| Alexey Kodanev |
2 |
0.09% |
1 |
1.10% |
| Thomas Gleixner |
2 |
0.09% |
1 |
1.10% |
| Eric W. Biedermann |
1 |
0.05% |
1 |
1.10% |
| Joe Perches |
1 |
0.05% |
1 |
1.10% |
| Colin Ian King |
1 |
0.05% |
1 |
1.10% |
| Total |
2125 |
|
91 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* IPV6 GSO/GRO offload support
* Linux INET implementation
*
* Copyright (C) 2016 secunet Security Networks AG
* Author: Steffen Klassert <steffen.klassert@secunet.com>
*
* ESP GRO support
*/
#include <linux/skbuff.h>
#include <linux/init.h>
#include <net/protocol.h>
#include <crypto/aead.h>
#include <crypto/authenc.h>
#include <linux/err.h>
#include <linux/module.h>
#include <net/gro.h>
#include <net/gso.h>
#include <net/ip.h>
#include <net/xfrm.h>
#include <net/esp.h>
#include <linux/scatterlist.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <net/ip6_route.h>
#include <net/ipv6.h>
#include <linux/icmpv6.h>
static __u16 esp6_nexthdr_esp_offset(struct ipv6hdr *ipv6_hdr, int nhlen)
{
int off = sizeof(struct ipv6hdr);
struct ipv6_opt_hdr *exthdr;
/* ESP or ESPINUDP */
if (likely(ipv6_hdr->nexthdr == NEXTHDR_ESP ||
ipv6_hdr->nexthdr == NEXTHDR_UDP))
return offsetof(struct ipv6hdr, nexthdr);
while (off < nhlen) {
exthdr = (void *)ipv6_hdr + off;
if (exthdr->nexthdr == NEXTHDR_ESP)
return off;
off += ipv6_optlen(exthdr);
}
return 0;
}
static struct sk_buff *esp6_gro_receive(struct list_head *head,
struct sk_buff *skb)
{
int offset = skb_gro_offset(skb);
struct xfrm_offload *xo;
struct xfrm_state *x;
int encap_type = 0;
__be32 seq;
__be32 spi;
int nhoff;
if (NAPI_GRO_CB(skb)->proto == IPPROTO_UDP)
encap_type = UDP_ENCAP_ESPINUDP;
if (!pskb_pull(skb, offset))
return NULL;
if (xfrm_parse_spi(skb, IPPROTO_ESP, &spi, &seq) != 0)
goto out;
xo = xfrm_offload(skb);
if (!xo || !(xo->flags & CRYPTO_DONE)) {
struct sec_path *sp = secpath_set(skb);
if (!sp)
goto out;
if (sp->len == XFRM_MAX_DEPTH)
goto out_reset;
x = xfrm_state_lookup(dev_net(skb->dev), skb->mark,
(xfrm_address_t *)&ipv6_hdr(skb)->daddr,
spi, IPPROTO_ESP, AF_INET6);
if (!x)
goto out_reset;
skb->mark = xfrm_smark_get(skb->mark, x);
sp->xvec[sp->len++] = x;
sp->olen++;
xo = xfrm_offload(skb);
if (!xo)
goto out_reset;
}
xo->flags |= XFRM_GRO;
nhoff = esp6_nexthdr_esp_offset(ipv6_hdr(skb), offset);
if (!nhoff)
goto out;
IP6CB(skb)->nhoff = nhoff;
XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = NULL;
XFRM_SPI_SKB_CB(skb)->family = AF_INET6;
XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
XFRM_SPI_SKB_CB(skb)->seq = seq;
/* We don't need to handle errors from xfrm_input, it does all
* the error handling and frees the resources on error. */
xfrm_input(skb, IPPROTO_ESP, spi, encap_type);
return ERR_PTR(-EINPROGRESS);
out_reset:
secpath_reset(skb);
out:
skb_push(skb, offset);
NAPI_GRO_CB(skb)->same_flow = 0;
NAPI_GRO_CB(skb)->flush = 1;
return NULL;
}
static void esp6_gso_encap(struct xfrm_state *x, struct sk_buff *skb)
{
struct ip_esp_hdr *esph;
struct ipv6hdr *iph = ipv6_hdr(skb);
struct xfrm_offload *xo = xfrm_offload(skb);
u8 proto = iph->nexthdr;
skb_push(skb, -skb_network_offset(skb));
if (x->outer_mode.encap == XFRM_MODE_TRANSPORT) {
__be16 frag;
ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &proto, &frag);
}
esph = ip_esp_hdr(skb);
*skb_mac_header(skb) = IPPROTO_ESP;
esph->spi = x->id.spi;
esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
xo->proto = proto;
}
static struct sk_buff *xfrm6_tunnel_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
__be16 type = x->inner_mode.family == AF_INET ? htons(ETH_P_IP)
: htons(ETH_P_IPV6);
return skb_eth_gso_segment(skb, features, type);
}
static struct sk_buff *xfrm6_transport_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
const struct net_offload *ops;
struct sk_buff *segs = ERR_PTR(-EINVAL);
struct xfrm_offload *xo = xfrm_offload(skb);
skb->transport_header += x->props.header_len;
ops = rcu_dereference(inet6_offloads[xo->proto]);
if (likely(ops && ops->callbacks.gso_segment))
segs = ops->callbacks.gso_segment(skb, features);
return segs;
}
static struct sk_buff *xfrm6_beet_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
struct xfrm_offload *xo = xfrm_offload(skb);
struct sk_buff *segs = ERR_PTR(-EINVAL);
const struct net_offload *ops;
u8 proto = xo->proto;
skb->transport_header += x->props.header_len;
if (x->sel.family != AF_INET6) {
skb->transport_header -=
(sizeof(struct ipv6hdr) - sizeof(struct iphdr));
if (proto == IPPROTO_BEETPH) {
struct ip_beet_phdr *ph =
(struct ip_beet_phdr *)skb->data;
skb->transport_header += ph->hdrlen * 8;
proto = ph->nexthdr;
} else {
skb->transport_header -= IPV4_BEET_PHMAXLEN;
}
if (proto == IPPROTO_TCP)
skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6;
} else {
__be16 frag;
skb->transport_header +=
ipv6_skip_exthdr(skb, 0, &proto, &frag);
}
if (proto == IPPROTO_IPIP)
skb_shinfo(skb)->gso_type |= SKB_GSO_IPXIP6;
__skb_pull(skb, skb_transport_offset(skb));
ops = rcu_dereference(inet6_offloads[proto]);
if (likely(ops && ops->callbacks.gso_segment))
segs = ops->callbacks.gso_segment(skb, features);
return segs;
}
static struct sk_buff *xfrm6_outer_mode_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
{
switch (x->outer_mode.encap) {
case XFRM_MODE_TUNNEL:
return xfrm6_tunnel_gso_segment(x, skb, features);
case XFRM_MODE_TRANSPORT:
return xfrm6_transport_gso_segment(x, skb, features);
case XFRM_MODE_BEET:
return xfrm6_beet_gso_segment(x, skb, features);
}
return ERR_PTR(-EOPNOTSUPP);
}
static struct sk_buff *esp6_gso_segment(struct sk_buff *skb,
netdev_features_t features)
{
struct xfrm_state *x;
struct ip_esp_hdr *esph;
struct crypto_aead *aead;
netdev_features_t esp_features = features;
struct xfrm_offload *xo = xfrm_offload(skb);
struct sec_path *sp;
if (!xo)
return ERR_PTR(-EINVAL);
if (!(skb_shinfo(skb)->gso_type & SKB_GSO_ESP))
return ERR_PTR(-EINVAL);
sp = skb_sec_path(skb);
x = sp->xvec[sp->len - 1];
aead = x->data;
esph = ip_esp_hdr(skb);
if (esph->spi != x->id.spi)
return ERR_PTR(-EINVAL);
if (!pskb_may_pull(skb, sizeof(*esph) + crypto_aead_ivsize(aead)))
return ERR_PTR(-EINVAL);
__skb_pull(skb, sizeof(*esph) + crypto_aead_ivsize(aead));
skb->encap_hdr_csum = 1;
if (!(features & NETIF_F_HW_ESP) || x->xso.dev != skb->dev)
esp_features = features & ~(NETIF_F_SG | NETIF_F_CSUM_MASK |
NETIF_F_SCTP_CRC);
else if (!(features & NETIF_F_HW_ESP_TX_CSUM))
esp_features = features & ~(NETIF_F_CSUM_MASK |
NETIF_F_SCTP_CRC);
xo->flags |= XFRM_GSO_SEGMENT;
return xfrm6_outer_mode_gso_segment(x, skb, esp_features);
}
static int esp6_input_tail(struct xfrm_state *x, struct sk_buff *skb)
{
struct crypto_aead *aead = x->data;
struct xfrm_offload *xo = xfrm_offload(skb);
if (!pskb_may_pull(skb, sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead)))
return -EINVAL;
if (!(xo->flags & CRYPTO_DONE))
skb->ip_summed = CHECKSUM_NONE;
return esp6_input_done2(skb, 0);
}
static int esp6_xmit(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features)
{
int len;
int err;
int alen;
int blksize;
struct xfrm_offload *xo;
struct crypto_aead *aead;
struct esp_info esp;
bool hw_offload = true;
__u32 seq;
esp.inplace = true;
xo = xfrm_offload(skb);
if (!xo)
return -EINVAL;
if (!(features & NETIF_F_HW_ESP) || x->xso.dev != skb->dev) {
xo->flags |= CRYPTO_FALLBACK;
hw_offload = false;
}
esp.proto = xo->proto;
/* skb is pure payload to encrypt */
aead = x->data;
alen = crypto_aead_authsize(aead);
esp.tfclen = 0;
/* XXX: Add support for tfc padding here. */
blksize = ALIGN(crypto_aead_blocksize(aead), 4);
esp.clen = ALIGN(skb->len + 2 + esp.tfclen, blksize);
esp.plen = esp.clen - skb->len - esp.tfclen;
esp.tailen = esp.tfclen + esp.plen + alen;
if (!hw_offload || !skb_is_gso(skb)) {
esp.nfrags = esp6_output_head(x, skb, &esp);
if (esp.nfrags < 0)
return esp.nfrags;
}
seq = xo->seq.low;
esp.esph = ip_esp_hdr(skb);
esp.esph->spi = x->id.spi;
skb_push(skb, -skb_network_offset(skb));
if (xo->flags & XFRM_GSO_SEGMENT) {
esp.esph->seq_no = htonl(seq);
if (!skb_is_gso(skb))
xo->seq.low++;
else
xo->seq.low += skb_shinfo(skb)->gso_segs;
}
if (xo->seq.low < seq)
xo->seq.hi++;
esp.seqno = cpu_to_be64(xo->seq.low + ((u64)xo->seq.hi << 32));
len = skb->len - sizeof(struct ipv6hdr);
if (len > IPV6_MAXPLEN)
len = 0;
ipv6_hdr(skb)->payload_len = htons(len);
if (hw_offload) {
if (!skb_ext_add(skb, SKB_EXT_SEC_PATH))
return -ENOMEM;
xo = xfrm_offload(skb);
if (!xo)
return -EINVAL;
xo->flags |= XFRM_XMIT;
return 0;
}
err = esp6_output_tail(x, skb, &esp);
if (err)
return err;
secpath_reset(skb);
if (skb_needs_linearize(skb, skb->dev->features) &&
__skb_linearize(skb))
return -ENOMEM;
return 0;
}
static const struct net_offload esp6_offload = {
.callbacks = {
.gro_receive = esp6_gro_receive,
.gso_segment = esp6_gso_segment,
},
};
static const struct xfrm_type_offload esp6_type_offload = {
.owner = THIS_MODULE,
.proto = IPPROTO_ESP,
.input_tail = esp6_input_tail,
.xmit = esp6_xmit,
.encap = esp6_gso_encap,
};
static int __init esp6_offload_init(void)
{
if (xfrm_register_type_offload(&esp6_type_offload, AF_INET6) < 0) {
pr_info("%s: can't add xfrm type offload\n", __func__);
return -EAGAIN;
}
return inet6_add_offload(&esp6_offload, IPPROTO_ESP);
}
static void __exit esp6_offload_exit(void)
{
xfrm_unregister_type_offload(&esp6_type_offload, AF_INET6);
inet6_del_offload(&esp6_offload, IPPROTO_ESP);
}
module_init(esp6_offload_init);
module_exit(esp6_offload_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Steffen Klassert <steffen.klassert@secunet.com>");
MODULE_ALIAS_XFRM_OFFLOAD_TYPE(AF_INET6, XFRM_PROTO_ESP);
MODULE_DESCRIPTION("IPV6 GSO/GRO offload support");