Release 4.11 net/ipv6/ila/ila_lwt.c
#include <linux/errno.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/socket.h>
#include <linux/types.h>
#include <net/checksum.h>
#include <net/dst_cache.h>
#include <net/ip.h>
#include <net/ip6_fib.h>
#include <net/ip6_route.h>
#include <net/lwtunnel.h>
#include <net/protocol.h>
#include <uapi/linux/ila.h>
#include "ila.h"
struct ila_lwt {
struct ila_params p;
struct dst_cache dst_cache;
u32 connected : 1;
};
static inline struct ila_lwt *ila_lwt_lwtunnel(
struct lwtunnel_state *lwt)
{
return (struct ila_lwt *)lwt->data;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 24 | 100.00% | 2 | 100.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
static inline struct ila_params *ila_params_lwtunnel(
struct lwtunnel_state *lwt)
{
return &ila_lwt_lwtunnel(lwt)->p;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
static int ila_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct dst_entry *orig_dst = skb_dst(skb);
struct rt6_info *rt = (struct rt6_info *)orig_dst;
struct ila_lwt *ilwt = ila_lwt_lwtunnel(orig_dst->lwtstate);
struct dst_entry *dst;
int err = -EINVAL;
if (skb->protocol != htons(ETH_P_IPV6))
goto drop;
ila_update_ipv6_locator(skb, ila_params_lwtunnel(orig_dst->lwtstate),
true);
if (rt->rt6i_flags & (RTF_GATEWAY | RTF_CACHE)) {
/* Already have a next hop address in route, no need for
* dest cache route.
*/
return orig_dst->lwtstate->orig_output(net, sk, skb);
}
dst = dst_cache_get(&ilwt->dst_cache);
if (unlikely(!dst)) {
struct ipv6hdr *ip6h = ipv6_hdr(skb);
struct flowi6 fl6;
/* Lookup a route for the new destination. Take into
* account that the base route may already have a gateway.
*/
memset(&fl6, 0, sizeof(fl6));
fl6.flowi6_oif = orig_dst->dev->ifindex;
fl6.flowi6_iif = LOOPBACK_IFINDEX;
fl6.daddr = *rt6_nexthop((struct rt6_info *)orig_dst,
&ip6h->daddr);
dst = ip6_route_output(net, NULL, &fl6);
if (dst->error) {
err = -EHOSTUNREACH;
dst_release(dst);
goto drop;
}
dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), NULL, 0);
if (IS_ERR(dst)) {
err = PTR_ERR(dst);
goto drop;
}
if (ilwt->connected)
dst_cache_set_ip6(&ilwt->dst_cache, dst, &fl6.saddr);
}
skb_dst_set(skb, dst);
return dst_output(net, sk, skb);
drop:
kfree_skb(skb);
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 318 | 97.25% | 5 | 71.43% |
| Eric W. Biedermann | 7 | 2.14% | 1 | 14.29% |
| Jiri Benc | 2 | 0.61% | 1 | 14.29% |
| Total | 327 | 100.00% | 7 | 100.00% |
static int ila_input(struct sk_buff *skb)
{
struct dst_entry *dst = skb_dst(skb);
if (skb->protocol != htons(ETH_P_IPV6))
goto drop;
ila_update_ipv6_locator(skb, ila_params_lwtunnel(dst->lwtstate), false);
return dst->lwtstate->orig_input(skb);
drop:
kfree_skb(skb);
return -EINVAL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 66 | 94.29% | 3 | 75.00% |
| Jiri Benc | 4 | 5.71% | 1 | 25.00% |
| Total | 70 | 100.00% | 4 | 100.00% |
static const struct nla_policy ila_nl_policy[ILA_ATTR_MAX + 1] = {
[ILA_ATTR_LOCATOR] = { .type = NLA_U64, },
[ILA_ATTR_CSUM_MODE] = { .type = NLA_U8, },
};
static int ila_build_state(struct nlattr *nla,
unsigned int family, const void *cfg,
struct lwtunnel_state **ts)
{
struct ila_lwt *ilwt;
struct ila_params *p;
struct nlattr *tb[ILA_ATTR_MAX + 1];
struct lwtunnel_state *newts;
const struct fib6_config *cfg6 = cfg;
struct ila_addr *iaddr;
int ret;
if (family != AF_INET6)
return -EINVAL;
if (cfg6->fc_dst_len < 8 * sizeof(struct ila_locator) + 3) {
/* Need to have full locator and at least type field
* included in destination
*/
return -EINVAL;
}
iaddr = (struct ila_addr *)&cfg6->fc_dst;
if (!ila_addr_is_ila(iaddr) || ila_csum_neutral_set(iaddr->ident)) {
/* Don't allow translation for a non-ILA address or checksum
* neutral flag to be set.
*/
return -EINVAL;
}
ret = nla_parse_nested(tb, ILA_ATTR_MAX, nla,
ila_nl_policy);
if (ret < 0)
return ret;
if (!tb[ILA_ATTR_LOCATOR])
return -EINVAL;
newts = lwtunnel_state_alloc(sizeof(*ilwt));
if (!newts)
return -ENOMEM;
ilwt = ila_lwt_lwtunnel(newts);
ret = dst_cache_init(&ilwt->dst_cache, GFP_ATOMIC);
if (ret) {
kfree(newts);
return ret;
}
p = ila_params_lwtunnel(newts);
p->locator.v64 = (__force __be64)nla_get_u64(tb[ILA_ATTR_LOCATOR]);
/* Precompute checksum difference for translation since we
* know both the old locator and the new one.
*/
p->locator_match = iaddr->loc;
p->csum_diff = compute_csum_diff8(
(__be32 *)&p->locator_match, (__be32 *)&p->locator);
if (tb[ILA_ATTR_CSUM_MODE])
p->csum_mode = nla_get_u8(tb[ILA_ATTR_CSUM_MODE]);
ila_init_saved_csum(p);
newts->type = LWTUNNEL_ENCAP_ILA;
newts->flags |= LWTUNNEL_STATE_OUTPUT_REDIRECT |
LWTUNNEL_STATE_INPUT_REDIRECT;
if (cfg6->fc_dst_len == 8 * sizeof(struct in6_addr))
ilwt->connected = 1;
*ts = newts;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 341 | 98.55% | 6 | 85.71% |
| Thomas Graf | 5 | 1.45% | 1 | 14.29% |
| Total | 346 | 100.00% | 7 | 100.00% |
static void ila_destroy_state(struct lwtunnel_state *lwt)
{
dst_cache_destroy(&ila_lwt_lwtunnel(lwt)->dst_cache);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
static int ila_fill_encap_info(struct sk_buff *skb,
struct lwtunnel_state *lwtstate)
{
struct ila_params *p = ila_params_lwtunnel(lwtstate);
if (nla_put_u64_64bit(skb, ILA_ATTR_LOCATOR, (__force u64)p->locator.v64,
ILA_ATTR_PAD))
goto nla_put_failure;
if (nla_put_u8(skb, ILA_ATTR_CSUM_MODE, (__force u8)p->csum_mode))
goto nla_put_failure;
return 0;
nla_put_failure:
return -EMSGSIZE;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 76 | 96.20% | 4 | 80.00% |
| Nicolas Dichtel | 3 | 3.80% | 1 | 20.00% |
| Total | 79 | 100.00% | 5 | 100.00% |
static int ila_encap_nlsize(struct lwtunnel_state *lwtstate)
{
return nla_total_size_64bit(sizeof(u64)) + /* ILA_ATTR_LOCATOR */
nla_total_size(sizeof(u8)) + /* ILA_ATTR_CSUM_MODE */
0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 25 | 78.12% | 2 | 66.67% |
| Nicolas Dichtel | 7 | 21.88% | 1 | 33.33% |
| Total | 32 | 100.00% | 3 | 100.00% |
static int ila_encap_cmp(struct lwtunnel_state *a, struct lwtunnel_state *b)
{
struct ila_params *a_p = ila_params_lwtunnel(a);
struct ila_params *b_p = ila_params_lwtunnel(b);
return (a_p->locator.v64 != b_p->locator.v64);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 51 | 100.00% | 2 | 100.00% |
| Total | 51 | 100.00% | 2 | 100.00% |
static const struct lwtunnel_encap_ops ila_encap_ops = {
.build_state = ila_build_state,
.destroy_state = ila_destroy_state,
.output = ila_output,
.input = ila_input,
.fill_encap = ila_fill_encap_info,
.get_encap_size = ila_encap_nlsize,
.cmp_encap = ila_encap_cmp,
.owner = THIS_MODULE,
};
int ila_lwt_init(void)
{
return lwtunnel_encap_add_ops(&ila_encap_ops, LWTUNNEL_ENCAP_ILA);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 16 | 100.00% | 2 | 100.00% |
| Total | 16 | 100.00% | 2 | 100.00% |
void ila_lwt_fini(void)
{
lwtunnel_encap_del_ops(&ila_encap_ops, LWTUNNEL_ENCAP_ILA);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 15 | 100.00% | 2 | 100.00% |
| Total | 15 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Tom Herbert | 1120 | 97.05% | 10 | 58.82% |
| Nicolas Dichtel | 10 | 0.87% | 2 | 11.76% |
| Eric W. Biedermann | 7 | 0.61% | 1 | 5.88% |
| Jiri Benc | 6 | 0.52% | 1 | 5.88% |
| Thomas Graf | 5 | 0.43% | 1 | 5.88% |
| Robert Shearman | 5 | 0.43% | 1 | 5.88% |
| Stephen Hemminger | 1 | 0.09% | 1 | 5.88% |
| Total | 1154 | 100.00% | 17 | 100.00% |
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