Release 4.7 net/ipv4/fib_rules.c
/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* IPv4 Forwarding Information Base: policy rules.
*
* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
* Thomas Graf <tgraf@suug.ch>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Fixes:
* Rani Assaf : local_rule cannot be deleted
* Marc Boucher : routing by fwmark
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <linux/netlink.h>
#include <linux/inetdevice.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/rcupdate.h>
#include <linux/export.h>
#include <net/ip.h>
#include <net/route.h>
#include <net/tcp.h>
#include <net/ip_fib.h>
#include <net/fib_rules.h>
struct fib4_rule {
struct fib_rule common;
u8 dst_len;
u8 src_len;
u8 tos;
__be32 src;
__be32 srcmask;
__be32 dst;
__be32 dstmask;
#ifdef CONFIG_IP_ROUTE_CLASSID
u32 tclassid;
#endif
};
int __fib_lookup(struct net *net, struct flowi4 *flp,
struct fib_result *res, unsigned int flags)
{
struct fib_lookup_arg arg = {
.result = res,
.flags = flags,
};
int err;
err = fib_rules_lookup(net->ipv4.rules_ops, flowi4_to_flowi(flp), 0, &arg);
#ifdef CONFIG_IP_ROUTE_CLASSID
if (arg.rule)
res->tclassid = ((struct fib4_rule *)arg.rule)->tclassid;
else
res->tclassid = 0;
#endif
if (err == -ESRCH)
err = -ENETUNREACH;
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 36 | 31.58% | 1 | 10.00% |
david s. miller | david s. miller | 33 | 28.95% | 3 | 30.00% |
pre-git | pre-git | 14 | 12.28% | 1 | 10.00% |
panu matilainen | panu matilainen | 12 | 10.53% | 1 | 10.00% |
denis v. lunev | denis v. lunev | 10 | 8.77% | 2 | 20.00% |
andy gospodarek | andy gospodarek | 5 | 4.39% | 1 | 10.00% |
eric dumazet | eric dumazet | 4 | 3.51% | 1 | 10.00% |
| Total | 114 | 100.00% | 10 | 100.00% |
EXPORT_SYMBOL_GPL(__fib_lookup);
static int fib4_rule_action(struct fib_rule *rule, struct flowi *flp,
int flags, struct fib_lookup_arg *arg)
{
int err = -EAGAIN;
struct fib_table *tbl;
switch (rule->action) {
case FR_ACT_TO_TBL:
break;
case FR_ACT_UNREACHABLE:
return -ENETUNREACH;
case FR_ACT_PROHIBIT:
return -EACCES;
case FR_ACT_BLACKHOLE:
default:
return -EINVAL;
}
rcu_read_lock();
tbl = fib_get_table(rule->fr_net, rule->table);
if (tbl)
err = fib_table_lookup(tbl, &flp->u.ip4,
(struct fib_result *)arg->result,
arg->flags);
rcu_read_unlock();
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
pre-git | pre-git | 46 | 37.70% | 3 | 21.43% |
thomas graf | thomas graf | 44 | 36.07% | 1 | 7.14% |
alexander duyck | alexander duyck | 11 | 9.02% | 1 | 7.14% |
eric dumazet | eric dumazet | 8 | 6.56% | 2 | 14.29% |
david s. miller | david s. miller | 6 | 4.92% | 2 | 14.29% |
denis v. lunev | denis v. lunev | 4 | 3.28% | 2 | 14.29% |
robert olsson | robert olsson | 1 | 0.82% | 1 | 7.14% |
adrian bunk | adrian bunk | 1 | 0.82% | 1 | 7.14% |
stephen hemminger | stephen hemminger | 1 | 0.82% | 1 | 7.14% |
| Total | 122 | 100.00% | 14 | 100.00% |
static bool fib4_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg)
{
struct fib_result *result = (struct fib_result *) arg->result;
struct net_device *dev = NULL;
if (result->fi)
dev = result->fi->fib_dev;
/* do not accept result if the route does
* not meet the required prefix length
*/
if (result->prefixlen <= rule->suppress_prefixlen)
goto suppress_route;
/* do not accept result if the route uses a device
* belonging to a forbidden interface group
*/
if (rule->suppress_ifgroup != -1 && dev && dev->group == rule->suppress_ifgroup)
goto suppress_route;
return false;
suppress_route:
if (!(arg->flags & FIB_LOOKUP_NOREF))
fib_info_put(result->fi);
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
stefan tomanek | stefan tomanek | 114 | 100.00% | 4 | 100.00% |
| Total | 114 | 100.00% | 4 | 100.00% |
static int fib4_rule_match(struct fib_rule *rule, struct flowi *fl, int flags)
{
struct fib4_rule *r = (struct fib4_rule *) rule;
struct flowi4 *fl4 = &fl->u.ip4;
__be32 daddr = fl4->daddr;
__be32 saddr = fl4->saddr;
if (((saddr ^ r->src) & r->srcmask) ||
((daddr ^ r->dst) & r->dstmask))
return 0;
if (r->tos && (r->tos != fl4->flowi4_tos))
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 76 | 67.86% | 1 | 25.00% |
david s. miller | david s. miller | 18 | 16.07% | 1 | 25.00% |
pre-git | pre-git | 16 | 14.29% | 1 | 25.00% |
al viro | al viro | 2 | 1.79% | 1 | 25.00% |
| Total | 112 | 100.00% | 4 | 100.00% |
static struct fib_table *fib_empty_table(struct net *net)
{
u32 id;
for (id = 1; id <= RT_TABLE_MAX; id++)
if (!fib_get_table(net, id))
return fib_new_table(net, id);
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 28 | 56.00% | 1 | 16.67% |
denis v. lunev | denis v. lunev | 8 | 16.00% | 1 | 16.67% |
pre-git | pre-git | 8 | 16.00% | 1 | 16.67% |
patrick mchardy | patrick mchardy | 5 | 10.00% | 2 | 33.33% |
ian morris | ian morris | 1 | 2.00% | 1 | 16.67% |
| Total | 50 | 100.00% | 6 | 100.00% |
static const struct nla_policy fib4_rule_policy[FRA_MAX+1] = {
FRA_GENERIC_POLICY,
[FRA_FLOW] = { .type = NLA_U32 },
};
static int fib4_rule_configure(struct fib_rule *rule, struct sk_buff *skb,
struct fib_rule_hdr *frh,
struct nlattr **tb)
{
struct net *net = sock_net(skb->sk);
int err = -EINVAL;
struct fib4_rule *rule4 = (struct fib4_rule *) rule;
if (frh->tos & ~IPTOS_TOS_MASK)
goto errout;
/* split local/main if they are not already split */
err = fib_unmerge(net);
if (err)
goto errout;
if (rule->table == RT_TABLE_UNSPEC) {
if (rule->action == FR_ACT_TO_TBL) {
struct fib_table *table;
table = fib_empty_table(net);
if (!table) {
err = -ENOBUFS;
goto errout;
}
rule->table = table->tb_id;
}
}
if (frh->src_len)
rule4->src = nla_get_in_addr(tb[FRA_SRC]);
if (frh->dst_len)
rule4->dst = nla_get_in_addr(tb[FRA_DST]);
#ifdef CONFIG_IP_ROUTE_CLASSID
if (tb[FRA_FLOW]) {
rule4->tclassid = nla_get_u32(tb[FRA_FLOW]);
if (rule4->tclassid)
net->ipv4.fib_num_tclassid_users++;
}
#endif
rule4->src_len = frh->src_len;
rule4->srcmask = inet_make_mask(rule4->src_len);
rule4->dst_len = frh->dst_len;
rule4->dstmask = inet_make_mask(rule4->dst_len);
rule4->tos = frh->tos;
net->ipv4.fib_has_custom_rules = true;
fib_flush_external(rule->fr_net);
err = 0;
errout:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 166 | 58.45% | 2 | 12.50% |
pre-git | pre-git | 53 | 18.66% | 3 | 18.75% |
david s. miller | david s. miller | 23 | 8.10% | 2 | 12.50% |
alexander duyck | alexander duyck | 15 | 5.28% | 1 | 6.25% |
denis v. lunev | denis v. lunev | 12 | 4.23% | 2 | 12.50% |
scott feldman | scott feldman | 7 | 2.46% | 1 | 6.25% |
hideaki yoshifuji | hideaki yoshifuji | 3 | 1.06% | 1 | 6.25% |
jiri benc | jiri benc | 2 | 0.70% | 1 | 6.25% |
linus torvalds | linus torvalds | 1 | 0.35% | 1 | 6.25% |
ian morris | ian morris | 1 | 0.35% | 1 | 6.25% |
patrick mchardy | patrick mchardy | 1 | 0.35% | 1 | 6.25% |
| Total | 284 | 100.00% | 16 | 100.00% |
static int fib4_rule_delete(struct fib_rule *rule)
{
struct net *net = rule->fr_net;
int err;
/* split local/main if they are not already split */
err = fib_unmerge(net);
if (err)
goto errout;
#ifdef CONFIG_IP_ROUTE_CLASSID
if (((struct fib4_rule *)rule)->tclassid)
net->ipv4.fib_num_tclassid_users--;
#endif
net->ipv4.fib_has_custom_rules = true;
fib_flush_external(rule->fr_net);
errout:
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
david s. miller | david s. miller | 48 | 57.83% | 2 | 50.00% |
alexander duyck | alexander duyck | 28 | 33.73% | 1 | 25.00% |
scott feldman | scott feldman | 7 | 8.43% | 1 | 25.00% |
| Total | 83 | 100.00% | 4 | 100.00% |
static int fib4_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh,
struct nlattr **tb)
{
struct fib4_rule *rule4 = (struct fib4_rule *) rule;
if (frh->src_len && (rule4->src_len != frh->src_len))
return 0;
if (frh->dst_len && (rule4->dst_len != frh->dst_len))
return 0;
if (frh->tos && (rule4->tos != frh->tos))
return 0;
#ifdef CONFIG_IP_ROUTE_CLASSID
if (tb[FRA_FLOW] && (rule4->tclassid != nla_get_u32(tb[FRA_FLOW])))
return 0;
#endif
if (frh->src_len && (rule4->src != nla_get_in_addr(tb[FRA_SRC])))
return 0;
if (frh->dst_len && (rule4->dst != nla_get_in_addr(tb[FRA_DST])))
return 0;
return 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 134 | 79.29% | 2 | 33.33% |
pre-git | pre-git | 32 | 18.93% | 2 | 33.33% |
jiri benc | jiri benc | 2 | 1.18% | 1 | 16.67% |
patrick mchardy | patrick mchardy | 1 | 0.59% | 1 | 16.67% |
| Total | 169 | 100.00% | 6 | 100.00% |
static int fib4_rule_fill(struct fib_rule *rule, struct sk_buff *skb,
struct fib_rule_hdr *frh)
{
struct fib4_rule *rule4 = (struct fib4_rule *) rule;
frh->dst_len = rule4->dst_len;
frh->src_len = rule4->src_len;
frh->tos = rule4->tos;
if ((rule4->dst_len &&
nla_put_in_addr(skb, FRA_DST, rule4->dst)) ||
(rule4->src_len &&
nla_put_in_addr(skb, FRA_SRC, rule4->src)))
goto nla_put_failure;
#ifdef CONFIG_IP_ROUTE_CLASSID
if (rule4->tclassid &&
nla_put_u32(skb, FRA_FLOW, rule4->tclassid))
goto nla_put_failure;
#endif
return 0;
nla_put_failure:
return -ENOBUFS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 81 | 62.31% | 1 | 20.00% |
patrick mchardy | patrick mchardy | 30 | 23.08% | 2 | 40.00% |
david s. miller | david s. miller | 17 | 13.08% | 1 | 20.00% |
jiri benc | jiri benc | 2 | 1.54% | 1 | 20.00% |
| Total | 130 | 100.00% | 5 | 100.00% |
static size_t fib4_rule_nlmsg_payload(struct fib_rule *rule)
{
return nla_total_size(4) /* dst */
+ nla_total_size(4) /* src */
+ nla_total_size(4); /* flow */
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
static void fib4_rule_flush_cache(struct fib_rules_ops *ops)
{
rt_cache_flush(ops->fro_net);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 11 | 61.11% | 1 | 50.00% |
denis v. lunev | denis v. lunev | 7 | 38.89% | 1 | 50.00% |
| Total | 18 | 100.00% | 2 | 100.00% |
static const struct fib_rules_ops __net_initconst fib4_rules_ops_template = {
.family = AF_INET,
.rule_size = sizeof(struct fib4_rule),
.addr_size = sizeof(u32),
.action = fib4_rule_action,
.suppress = fib4_rule_suppress,
.match = fib4_rule_match,
.configure = fib4_rule_configure,
.delete = fib4_rule_delete,
.compare = fib4_rule_compare,
.fill = fib4_rule_fill,
.nlmsg_payload = fib4_rule_nlmsg_payload,
.flush_cache = fib4_rule_flush_cache,
.nlgroup = RTNLGRP_IPV4_RULE,
.policy = fib4_rule_policy,
.owner = THIS_MODULE,
};
static int fib_default_rules_init(struct fib_rules_ops *ops)
{
int err;
err = fib_default_rule_add(ops, 0, RT_TABLE_LOCAL, 0);
if (err < 0)
return err;
err = fib_default_rule_add(ops, 0x7FFE, RT_TABLE_MAIN, 0);
if (err < 0)
return err;
err = fib_default_rule_add(ops, 0x7FFF, RT_TABLE_DEFAULT, 0);
if (err < 0)
return err;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
denis v. lunev | denis v. lunev | 72 | 86.75% | 2 | 33.33% |
robert olsson | robert olsson | 7 | 8.43% | 1 | 16.67% |
pre-git | pre-git | 3 | 3.61% | 2 | 33.33% |
patrick mchardy | patrick mchardy | 1 | 1.20% | 1 | 16.67% |
| Total | 83 | 100.00% | 6 | 100.00% |
int __net_init fib4_rules_init(struct net *net)
{
int err;
struct fib_rules_ops *ops;
ops = fib_rules_register(&fib4_rules_ops_template, net);
if (IS_ERR(ops))
return PTR_ERR(ops);
err = fib_default_rules_init(ops);
if (err < 0)
goto fail;
net->ipv4.rules_ops = ops;
net->ipv4.fib_has_custom_rules = false;
return 0;
fail:
/* also cleans all rules already added */
fib_rules_unregister(ops);
return err;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
denis v. lunev | denis v. lunev | 70 | 79.55% | 4 | 57.14% |
david s. miller | david s. miller | 8 | 9.09% | 1 | 14.29% |
eric w. biederman | eric w. biederman | 7 | 7.95% | 1 | 14.29% |
thomas graf | thomas graf | 3 | 3.41% | 1 | 14.29% |
| Total | 88 | 100.00% | 7 | 100.00% |
void __net_exit fib4_rules_exit(struct net *net)
{
fib_rules_unregister(net->ipv4.rules_ops);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
denis v. lunev | denis v. lunev | 20 | 100.00% | 2 | 100.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
thomas graf | thomas graf | 722 | 44.57% | 5 | 8.06% |
pre-git | pre-git | 223 | 13.77% | 7 | 11.29% |
denis v. lunev | denis v. lunev | 204 | 12.59% | 8 | 12.90% |
david s. miller | david s. miller | 159 | 9.81% | 7 | 11.29% |
stefan tomanek | stefan tomanek | 119 | 7.35% | 4 | 6.45% |
alexander duyck | alexander duyck | 54 | 3.33% | 2 | 3.23% |
patrick mchardy | patrick mchardy | 42 | 2.59% | 8 | 12.90% |
scott feldman | scott feldman | 14 | 0.86% | 1 | 1.61% |
robert olsson | robert olsson | 14 | 0.86% | 1 | 1.61% |
eric dumazet | eric dumazet | 13 | 0.80% | 2 | 3.23% |
panu matilainen | panu matilainen | 12 | 0.74% | 1 | 1.61% |
eric w. biederman | eric w. biederman | 7 | 0.43% | 1 | 1.61% |
al viro | al viro | 6 | 0.37% | 1 | 1.61% |
jiri benc | jiri benc | 6 | 0.37% | 2 | 3.23% |
andy gospodarek | andy gospodarek | 5 | 0.31% | 1 | 1.61% |
florian westphal | florian westphal | 4 | 0.25% | 1 | 1.61% |
paul gortmaker | paul gortmaker | 3 | 0.19% | 1 | 1.61% |
hideaki yoshifuji | hideaki yoshifuji | 3 | 0.19% | 1 | 1.61% |
adrian bunk | adrian bunk | 2 | 0.12% | 2 | 3.23% |
rusty russell | rusty russell | 2 | 0.12% | 1 | 1.61% |
linus torvalds | linus torvalds | 2 | 0.12% | 2 | 3.23% |
ian morris | ian morris | 2 | 0.12% | 1 | 1.61% |
andi kleen | andi kleen | 1 | 0.06% | 1 | 1.61% |
stephen hemminger | stephen hemminger | 1 | 0.06% | 1 | 1.61% |
| Total | 1620 | 100.00% | 62 | 100.00% |
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