Release 4.7 net/ipv4/ip_tunnel_core.c
/*
* Copyright (c) 2013 Nicira, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/in.h>
#include <linux/if_arp.h>
#include <linux/init.h>
#include <linux/in6.h>
#include <linux/inetdevice.h>
#include <linux/netfilter_ipv4.h>
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
#include <linux/static_key.h>
#include <net/ip.h>
#include <net/icmp.h>
#include <net/protocol.h>
#include <net/ip_tunnels.h>
#include <net/ip6_tunnel.h>
#include <net/arp.h>
#include <net/checksum.h>
#include <net/dsfield.h>
#include <net/inet_ecn.h>
#include <net/xfrm.h>
#include <net/net_namespace.h>
#include <net/netns/generic.h>
#include <net/rtnetlink.h>
#include <net/dst_metadata.h>
const struct ip_tunnel_encap_ops __rcu *
iptun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly;
EXPORT_SYMBOL(iptun_encaps);
const struct ip6_tnl_encap_ops __rcu *
ip6tun_encaps[MAX_IPTUN_ENCAP_OPS] __read_mostly;
EXPORT_SYMBOL(ip6tun_encaps);
void iptunnel_xmit(struct sock *sk, struct rtable *rt, struct sk_buff *skb,
__be32 src, __be32 dst, __u8 proto,
__u8 tos, __u8 ttl, __be16 df, bool xnet)
{
int pkt_len = skb->len - skb_inner_network_offset(skb);
struct net *net = dev_net(rt->dst.dev);
struct net_device *dev = skb->dev;
struct iphdr *iph;
int err;
skb_scrub_packet(skb, xnet);
skb_clear_hash(skb);
skb_dst_set(skb, &rt->dst);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
/* Push down and install the IP header. */
skb_push(skb, sizeof(struct iphdr));
skb_reset_network_header(skb);
iph = ip_hdr(skb);
iph->version = 4;
iph->ihl = sizeof(struct iphdr) >> 2;
iph->frag_off = df;
iph->protocol = proto;
iph->tos = tos;
iph->daddr = dst;
iph->saddr = src;
iph->ttl = ttl;
__ip_select_ident(net, iph, skb_shinfo(skb)->gso_segs ?: 1);
err = ip_local_out(net, sk, skb);
if (unlikely(net_xmit_eval(err)))
pkt_len = 0;
iptunnel_xmit_stats(dev, pkt_len);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pravin b shelar | pravin b shelar | 211 | 83.73% | 3 | 25.00% |
eric w. biederman | eric w. biederman | 18 | 7.14% | 3 | 25.00% |
nicolas dichtel | nicolas dichtel | 11 | 4.37% | 2 | 16.67% |
eric dumazet | eric dumazet | 7 | 2.78% | 1 | 8.33% |
tom herbert | tom herbert | 3 | 1.19% | 1 | 8.33% |
hannes frederic sowa | hannes frederic sowa | 1 | 0.40% | 1 | 8.33% |
steffen klassert | steffen klassert | 1 | 0.40% | 1 | 8.33% |
| Total | 252 | 100.00% | 12 | 100.00% |
EXPORT_SYMBOL_GPL(iptunnel_xmit);
int __iptunnel_pull_header(struct sk_buff *skb, int hdr_len,
__be16 inner_proto, bool raw_proto, bool xnet)
{
if (unlikely(!pskb_may_pull(skb, hdr_len)))
return -ENOMEM;
skb_pull_rcsum(skb, hdr_len);
if (!raw_proto && inner_proto == htons(ETH_P_TEB)) {
struct ethhdr *eh;
if (unlikely(!pskb_may_pull(skb, ETH_HLEN)))
return -ENOMEM;
eh = (struct ethhdr *)skb->data;
if (likely(eth_proto_is_802_3(eh->h_proto)))
skb->protocol = eh->h_proto;
else
skb->protocol = htons(ETH_P_802_2);
} else {
skb->protocol = inner_proto;
}
skb_clear_hash_if_not_l4(skb);
skb->vlan_tci = 0;
skb_set_queue_mapping(skb, 0);
skb_scrub_packet(skb, xnet);
return iptunnel_pull_offloads(skb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pravin b shelar | pravin b shelar | 129 | 79.14% | 1 | 14.29% |
jiri benc | jiri benc | 15 | 9.20% | 2 | 28.57% |
li rongqing | li rongqing | 11 | 6.75% | 1 | 14.29% |
jesse gross | jesse gross | 4 | 2.45% | 1 | 14.29% |
tom herbert | tom herbert | 3 | 1.84% | 1 | 14.29% |
alexander duyck | alexander duyck | 1 | 0.61% | 1 | 14.29% |
| Total | 163 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL_GPL(__iptunnel_pull_header);
struct metadata_dst *iptunnel_metadata_reply(struct metadata_dst *md,
gfp_t flags)
{
struct metadata_dst *res;
struct ip_tunnel_info *dst, *src;
if (!md || md->u.tun_info.mode & IP_TUNNEL_INFO_TX)
return NULL;
res = metadata_dst_alloc(0, flags);
if (!res)
return NULL;
dst = &res->u.tun_info;
src = &md->u.tun_info;
dst->key.tun_id = src->key.tun_id;
if (src->mode & IP_TUNNEL_INFO_IPV6)
memcpy(&dst->key.u.ipv6.dst, &src->key.u.ipv6.src,
sizeof(struct in6_addr));
else
dst->key.u.ipv4.dst = src->key.u.ipv4.src;
dst->mode = src->mode | IP_TUNNEL_INFO_TX;
return res;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jiri benc | jiri benc | 166 | 100.00% | 1 | 100.00% |
| Total | 166 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(iptunnel_metadata_reply);
int iptunnel_handle_offloads(struct sk_buff *skb,
int gso_type_mask)
{
int err;
if (likely(!skb->encapsulation)) {
skb_reset_inner_headers(skb);
skb->encapsulation = 1;
}
if (skb_is_gso(skb)) {
err = skb_header_unclone(skb, GFP_ATOMIC);
if (unlikely(err))
return err;
skb_shinfo(skb)->gso_type |= gso_type_mask;
return 0;
}
if (skb->ip_summed != CHECKSUM_PARTIAL) {
skb->ip_summed = CHECKSUM_NONE;
/* We clear encapsulation here to prevent badly-written
* drivers potentially deciding to offload an inner checksum
* if we set CHECKSUM_PARTIAL on the outer header.
* This should go away when the drivers are all fixed.
*/
skb->encapsulation = 0;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
eric dumazet | eric dumazet | 90 | 85.71% | 2 | 40.00% |
edward cree | edward cree | 9 | 8.57% | 2 | 40.00% |
alexander duyck | alexander duyck | 6 | 5.71% | 1 | 20.00% |
| Total | 105 | 100.00% | 5 | 100.00% |
EXPORT_SYMBOL_GPL(iptunnel_handle_offloads);
/* Often modified stats are per cpu, other are shared (netdev->stats) */
struct rtnl_link_stats64 *ip_tunnel_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *tot)
{
int i;
netdev_stats_to_stats64(tot, &dev->stats);
for_each_possible_cpu(i) {
const struct pcpu_sw_netstats *tstats =
per_cpu_ptr(dev->tstats, i);
u64 rx_packets, rx_bytes, tx_packets, tx_bytes;
unsigned int start;
do {
start = u64_stats_fetch_begin_irq(&tstats->syncp);
rx_packets = tstats->rx_packets;
tx_packets = tstats->tx_packets;
rx_bytes = tstats->rx_bytes;
tx_bytes = tstats->tx_bytes;
} while (u64_stats_fetch_retry_irq(&tstats->syncp, start));
tot->rx_packets += rx_packets;
tot->tx_packets += tx_packets;
tot->rx_bytes += rx_bytes;
tot->tx_bytes += tx_bytes;
}
return tot;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 129 | 91.49% | 1 | 33.33% |
alexander duyck | alexander duyck | 10 | 7.09% | 1 | 33.33% |
eric w. biederman | eric w. biederman | 2 | 1.42% | 1 | 33.33% |
| Total | 141 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL_GPL(ip_tunnel_get_stats64);
static const struct nla_policy ip_tun_policy[LWTUNNEL_IP_MAX + 1] = {
[LWTUNNEL_IP_ID] = { .type = NLA_U64 },
[LWTUNNEL_IP_DST] = { .type = NLA_U32 },
[LWTUNNEL_IP_SRC] = { .type = NLA_U32 },
[LWTUNNEL_IP_TTL] = { .type = NLA_U8 },
[LWTUNNEL_IP_TOS] = { .type = NLA_U8 },
[LWTUNNEL_IP_FLAGS] = { .type = NLA_U16 },
};
static int ip_tun_build_state(struct net_device *dev, struct nlattr *attr,
unsigned int family, const void *cfg,
struct lwtunnel_state **ts)
{
struct ip_tunnel_info *tun_info;
struct lwtunnel_state *new_state;
struct nlattr *tb[LWTUNNEL_IP_MAX + 1];
int err;
err = nla_parse_nested(tb, LWTUNNEL_IP_MAX, attr, ip_tun_policy);
if (err < 0)
return err;
new_state = lwtunnel_state_alloc(sizeof(*tun_info));
if (!new_state)
return -ENOMEM;
new_state->type = LWTUNNEL_ENCAP_IP;
tun_info = lwt_tun_info(new_state);
if (tb[LWTUNNEL_IP_ID])
tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP_ID]);
if (tb[LWTUNNEL_IP_DST])
tun_info->key.u.ipv4.dst = nla_get_in_addr(tb[LWTUNNEL_IP_DST]);
if (tb[LWTUNNEL_IP_SRC])
tun_info->key.u.ipv4.src = nla_get_in_addr(tb[LWTUNNEL_IP_SRC]);
if (tb[LWTUNNEL_IP_TTL])
tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP_TTL]);
if (tb[LWTUNNEL_IP_TOS])
tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP_TOS]);
if (tb[LWTUNNEL_IP_FLAGS])
tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP_FLAGS]);
tun_info->mode = IP_TUNNEL_INFO_TX;
tun_info->options_len = 0;
*ts = new_state;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 224 | 85.17% | 1 | 14.29% |
jiri benc | jiri benc | 26 | 9.89% | 3 | 42.86% |
tom herbert | tom herbert | 9 | 3.42% | 1 | 14.29% |
lance richardson | lance richardson | 2 | 0.76% | 1 | 14.29% |
haishuang yan | haishuang yan | 2 | 0.76% | 1 | 14.29% |
| Total | 263 | 100.00% | 7 | 100.00% |
static int ip_tun_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
if (nla_put_be64(skb, LWTUNNEL_IP_ID, tun_info->key.tun_id,
LWTUNNEL_IP_PAD) ||
nla_put_in_addr(skb, LWTUNNEL_IP_DST, tun_info->key.u.ipv4.dst) ||
nla_put_in_addr(skb, LWTUNNEL_IP_SRC, tun_info->key.u.ipv4.src) ||
nla_put_u8(skb, LWTUNNEL_IP_TOS, tun_info->key.tos) ||
nla_put_u8(skb, LWTUNNEL_IP_TTL, tun_info->key.ttl) ||
nla_put_be16(skb, LWTUNNEL_IP_FLAGS, tun_info->key.tun_flags))
return -ENOMEM;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 99 | 80.49% | 1 | 14.29% |
jiri benc | jiri benc | 18 | 14.63% | 3 | 42.86% |
nicolas dichtel | nicolas dichtel | 2 | 1.63% | 1 | 14.29% |
lance richardson | lance richardson | 2 | 1.63% | 1 | 14.29% |
haishuang yan | haishuang yan | 2 | 1.63% | 1 | 14.29% |
| Total | 123 | 100.00% | 7 | 100.00% |
static int ip_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
{
return nla_total_size_64bit(8) /* LWTUNNEL_IP_ID */
+ nla_total_size(4) /* LWTUNNEL_IP_DST */
+ nla_total_size(4) /* LWTUNNEL_IP_SRC */
+ nla_total_size(1) /* LWTUNNEL_IP_TOS */
+ nla_total_size(1) /* LWTUNNEL_IP_TTL */
+ nla_total_size(2); /* LWTUNNEL_IP_FLAGS */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 41 | 85.42% | 1 | 33.33% |
jiri benc | jiri benc | 6 | 12.50% | 1 | 33.33% |
nicolas dichtel | nicolas dichtel | 1 | 2.08% | 1 | 33.33% |
| Total | 48 | 100.00% | 3 | 100.00% |
static int ip_tun_cmp_encap(struct lwtunnel_state *a, struct lwtunnel_state *b)
{
return memcmp(lwt_tun_info(a), lwt_tun_info(b),
sizeof(struct ip_tunnel_info));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jiri benc | jiri benc | 36 | 100.00% | 1 | 100.00% |
| Total | 36 | 100.00% | 1 | 100.00% |
static const struct lwtunnel_encap_ops ip_tun_lwt_ops = {
.build_state = ip_tun_build_state,
.fill_encap = ip_tun_fill_encap_info,
.get_encap_size = ip_tun_encap_nlsize,
.cmp_encap = ip_tun_cmp_encap,
};
static const struct nla_policy ip6_tun_policy[LWTUNNEL_IP6_MAX + 1] = {
[LWTUNNEL_IP6_ID] = { .type = NLA_U64 },
[LWTUNNEL_IP6_DST] = { .len = sizeof(struct in6_addr) },
[LWTUNNEL_IP6_SRC] = { .len = sizeof(struct in6_addr) },
[LWTUNNEL_IP6_HOPLIMIT] = { .type = NLA_U8 },
[LWTUNNEL_IP6_TC] = { .type = NLA_U8 },
[LWTUNNEL_IP6_FLAGS] = { .type = NLA_U16 },
};
static int ip6_tun_build_state(struct net_device *dev, struct nlattr *attr,
unsigned int family, const void *cfg,
struct lwtunnel_state **ts)
{
struct ip_tunnel_info *tun_info;
struct lwtunnel_state *new_state;
struct nlattr *tb[LWTUNNEL_IP6_MAX + 1];
int err;
err = nla_parse_nested(tb, LWTUNNEL_IP6_MAX, attr, ip6_tun_policy);
if (err < 0)
return err;
new_state = lwtunnel_state_alloc(sizeof(*tun_info));
if (!new_state)
return -ENOMEM;
new_state->type = LWTUNNEL_ENCAP_IP6;
tun_info = lwt_tun_info(new_state);
if (tb[LWTUNNEL_IP6_ID])
tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]);
if (tb[LWTUNNEL_IP6_DST])
tun_info->key.u.ipv6.dst = nla_get_in6_addr(tb[LWTUNNEL_IP6_DST]);
if (tb[LWTUNNEL_IP6_SRC])
tun_info->key.u.ipv6.src = nla_get_in6_addr(tb[LWTUNNEL_IP6_SRC]);
if (tb[LWTUNNEL_IP6_HOPLIMIT])
tun_info->key.ttl = nla_get_u8(tb[LWTUNNEL_IP6_HOPLIMIT]);
if (tb[LWTUNNEL_IP6_TC])
tun_info->key.tos = nla_get_u8(tb[LWTUNNEL_IP6_TC]);
if (tb[LWTUNNEL_IP6_FLAGS])
tun_info->key.tun_flags = nla_get_be16(tb[LWTUNNEL_IP6_FLAGS]);
tun_info->mode = IP_TUNNEL_INFO_TX | IP_TUNNEL_INFO_IPV6;
tun_info->options_len = 0;
*ts = new_state;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jiri benc | jiri benc | 254 | 95.85% | 2 | 50.00% |
tom herbert | tom herbert | 9 | 3.40% | 1 | 25.00% |
lance richardson | lance richardson | 2 | 0.75% | 1 | 25.00% |
| Total | 265 | 100.00% | 4 | 100.00% |
static int ip6_tun_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
struct ip_tunnel_info *tun_info = lwt_tun_info(lwtstate);
if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id,
LWTUNNEL_IP6_PAD) ||
nla_put_in6_addr(skb, LWTUNNEL_IP6_DST, &tun_info->key.u.ipv6.dst) ||
nla_put_in6_addr(skb, LWTUNNEL_IP6_SRC, &tun_info->key.u.ipv6.src) ||
nla_put_u8(skb, LWTUNNEL_IP6_TC, tun_info->key.tos) ||
nla_put_u8(skb, LWTUNNEL_IP6_HOPLIMIT, tun_info->key.ttl) ||
nla_put_be16(skb, LWTUNNEL_IP6_FLAGS, tun_info->key.tun_flags))
return -ENOMEM;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jiri benc | jiri benc | 119 | 95.20% | 1 | 25.00% |
lance richardson | lance richardson | 2 | 1.60% | 1 | 25.00% |
nicolas dichtel | nicolas dichtel | 2 | 1.60% | 1 | 25.00% |
quentin armitage | quentin armitage | 2 | 1.60% | 1 | 25.00% |
| Total | 125 | 100.00% | 4 | 100.00% |
static int ip6_tun_encap_nlsize(struct lwtunnel_state *lwtstate)
{
return nla_total_size_64bit(8) /* LWTUNNEL_IP6_ID */
+ nla_total_size(16) /* LWTUNNEL_IP6_DST */
+ nla_total_size(16) /* LWTUNNEL_IP6_SRC */
+ nla_total_size(1) /* LWTUNNEL_IP6_HOPLIMIT */
+ nla_total_size(1) /* LWTUNNEL_IP6_TC */
+ nla_total_size(2); /* LWTUNNEL_IP6_FLAGS */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jiri benc | jiri benc | 47 | 97.92% | 1 | 50.00% |
nicolas dichtel | nicolas dichtel | 1 | 2.08% | 1 | 50.00% |
| Total | 48 | 100.00% | 2 | 100.00% |
static const struct lwtunnel_encap_ops ip6_tun_lwt_ops = {
.build_state = ip6_tun_build_state,
.fill_encap = ip6_tun_fill_encap_info,
.get_encap_size = ip6_tun_encap_nlsize,
.cmp_encap = ip_tun_cmp_encap,
};
void __init ip_tunnel_core_init(void)
{
/* If you land here, make sure whether increasing ip_tunnel_info's
* options_len is a reasonable choice with its usage in front ends
* (f.e., it's part of flow keys, etc).
*/
BUILD_BUG_ON(IP_TUNNEL_OPTS_MAX != 255);
lwtunnel_encap_add_ops(&ip_tun_lwt_ops, LWTUNNEL_ENCAP_IP);
lwtunnel_encap_add_ops(&ip6_tun_lwt_ops, LWTUNNEL_ENCAP_IP6);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 16 | 50.00% | 2 | 50.00% |
daniel borkmann | daniel borkmann | 8 | 25.00% | 1 | 25.00% |
jiri benc | jiri benc | 8 | 25.00% | 1 | 25.00% |
| Total | 32 | 100.00% | 4 | 100.00% |
struct static_key ip_tunnel_metadata_cnt = STATIC_KEY_INIT_FALSE;
EXPORT_SYMBOL(ip_tunnel_metadata_cnt);
void ip_tunnel_need_metadata(void)
{
static_key_slow_inc(&ip_tunnel_metadata_cnt);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 13 | 100.00% | 1 | 100.00% |
| Total | 13 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(ip_tunnel_need_metadata);
void ip_tunnel_unneed_metadata(void)
{
static_key_slow_dec(&ip_tunnel_metadata_cnt);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 13 | 100.00% | 1 | 100.00% |
| Total | 13 | 100.00% | 1 | 100.00% |
EXPORT_SYMBOL_GPL(ip_tunnel_unneed_metadata);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
jiri benc | jiri benc | 831 | 38.01% | 9 | 20.45% |
thomas graf | thomas graf | 525 | 24.02% | 3 | 6.82% |
pravin b shelar | pravin b shelar | 432 | 19.76% | 4 | 9.09% |
david s. miller | david s. miller | 135 | 6.18% | 1 | 2.27% |
eric dumazet | eric dumazet | 102 | 4.67% | 3 | 6.82% |
tom herbert | tom herbert | 59 | 2.70% | 4 | 9.09% |
eric w. biederman | eric w. biederman | 20 | 0.91% | 4 | 9.09% |
alexander duyck | alexander duyck | 17 | 0.78% | 3 | 6.82% |
nicolas dichtel | nicolas dichtel | 17 | 0.78% | 3 | 6.82% |
li rongqing | li rongqing | 11 | 0.50% | 1 | 2.27% |
edward cree | edward cree | 9 | 0.41% | 2 | 4.55% |
lance richardson | lance richardson | 8 | 0.37% | 1 | 2.27% |
daniel borkmann | daniel borkmann | 8 | 0.37% | 1 | 2.27% |
jesse gross | jesse gross | 4 | 0.18% | 1 | 2.27% |
haishuang yan | haishuang yan | 4 | 0.18% | 1 | 2.27% |
quentin armitage | quentin armitage | 2 | 0.09% | 1 | 2.27% |
hannes frederic sowa | hannes frederic sowa | 1 | 0.05% | 1 | 2.27% |
steffen klassert | steffen klassert | 1 | 0.05% | 1 | 2.27% |
| Total | 2186 | 100.00% | 44 | 100.00% |
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