Release 4.11 net/sched/cls_cgroup.c
/*
* net/sched/cls_cgroup.c Control Group Classifier
*
* 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.
*
* Authors: Thomas Graf <tgraf@suug.ch>
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/rcupdate.h>
#include <net/rtnetlink.h>
#include <net/pkt_cls.h>
#include <net/sock.h>
#include <net/cls_cgroup.h>
struct cls_cgroup_head {
u32 handle;
struct tcf_exts exts;
struct tcf_ematch_tree ematches;
struct tcf_proto *tp;
struct rcu_head rcu;
};
static int cls_cgroup_classify(struct sk_buff *skb, const struct tcf_proto *tp,
struct tcf_result *res)
{
struct cls_cgroup_head *head = rcu_dereference_bh(tp->root);
u32 classid = task_get_classid(skb);
if (!classid)
return -1;
if (!tcf_em_tree_match(skb, &head->ematches, NULL))
return -1;
res->classid = classid;
res->class = 0;
return tcf_exts_exec(skb, &head->exts, res);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 69 | 72.63% | 1 | 16.67% |
Paul Menage | 16 | 16.84% | 1 | 16.67% |
Daniel Borkmann | 4 | 4.21% | 1 | 16.67% |
John Fastabend | 3 | 3.16% | 1 | 16.67% |
Herbert Xu | 2 | 2.11% | 1 | 16.67% |
Eric Dumazet | 1 | 1.05% | 1 | 16.67% |
Total | 95 | 100.00% | 6 | 100.00% |
static unsigned long cls_cgroup_get(struct tcf_proto *tp, u32 handle)
{
return 0UL;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 18 | 100.00% | 1 | 100.00% |
Total | 18 | 100.00% | 1 | 100.00% |
static int cls_cgroup_init(struct tcf_proto *tp)
{
return 0;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 14 | 100.00% | 1 | 100.00% |
Total | 14 | 100.00% | 1 | 100.00% |
static const struct nla_policy cgroup_policy[TCA_CGROUP_MAX + 1] = {
[TCA_CGROUP_EMATCHES] = { .type = NLA_NESTED },
};
static void cls_cgroup_destroy_rcu(struct rcu_head *root)
{
struct cls_cgroup_head *head = container_of(root,
struct cls_cgroup_head,
rcu);
tcf_exts_destroy(&head->exts);
tcf_em_tree_destroy(&head->ematches);
kfree(head);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
John Fastabend | 47 | 100.00% | 1 | 100.00% |
Total | 47 | 100.00% | 1 | 100.00% |
static int cls_cgroup_change(struct net *net, struct sk_buff *in_skb,
struct tcf_proto *tp, unsigned long base,
u32 handle, struct nlattr **tca,
unsigned long *arg, bool ovr)
{
struct nlattr *tb[TCA_CGROUP_MAX + 1];
struct cls_cgroup_head *head = rtnl_dereference(tp->root);
struct cls_cgroup_head *new;
struct tcf_ematch_tree t;
struct tcf_exts e;
int err;
if (!tca[TCA_OPTIONS])
return -EINVAL;
if (!head && !handle)
return -EINVAL;
if (head && handle != head->handle)
return -ENOENT;
new = kzalloc(sizeof(*head), GFP_KERNEL);
if (!new)
return -ENOBUFS;
err = tcf_exts_init(&new->exts, TCA_CGROUP_ACT, TCA_CGROUP_POLICE);
if (err < 0)
goto errout;
new->handle = handle;
new->tp = tp;
err = nla_parse_nested(tb, TCA_CGROUP_MAX, tca[TCA_OPTIONS],
cgroup_policy);
if (err < 0)
goto errout;
err = tcf_exts_init(&e, TCA_CGROUP_ACT, TCA_CGROUP_POLICE);
if (err < 0)
goto errout;
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr);
if (err < 0) {
tcf_exts_destroy(&e);
goto errout;
}
err = tcf_em_tree_validate(tp, tb[TCA_CGROUP_EMATCHES], &t);
if (err < 0) {
tcf_exts_destroy(&e);
goto errout;
}
tcf_exts_change(tp, &new->exts, &e);
tcf_em_tree_change(tp, &new->ematches, &t);
rcu_assign_pointer(tp->root, new);
if (head)
call_rcu(&head->rcu, cls_cgroup_destroy_rcu);
return 0;
errout:
tcf_exts_destroy(&new->exts);
kfree(new);
return err;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 191 | 52.91% | 1 | 10.00% |
John Fastabend | 93 | 25.76% | 3 | 30.00% |
Américo Wang | 48 | 13.30% | 2 | 20.00% |
Minoru Usui | 12 | 3.32% | 1 | 10.00% |
Benjamin LaHaise | 7 | 1.94% | 1 | 10.00% |
Eric W. Biedermann | 5 | 1.39% | 1 | 10.00% |
Cong Wang | 5 | 1.39% | 1 | 10.00% |
Total | 361 | 100.00% | 10 | 100.00% |
static bool cls_cgroup_destroy(struct tcf_proto *tp, bool force)
{
struct cls_cgroup_head *head = rtnl_dereference(tp->root);
if (!force)
return false;
/* Head can still be NULL due to cls_cgroup_init(). */
if (head)
call_rcu(&head->rcu, cls_cgroup_destroy_rcu);
return true;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 25 | 48.08% | 1 | 16.67% |
Cong Wang | 15 | 28.85% | 1 | 16.67% |
John Fastabend | 9 | 17.31% | 2 | 33.33% |
Patrick McHardy | 2 | 3.85% | 1 | 16.67% |
Daniel Borkmann | 1 | 1.92% | 1 | 16.67% |
Total | 52 | 100.00% | 6 | 100.00% |
static int cls_cgroup_delete(struct tcf_proto *tp, unsigned long arg)
{
return -EOPNOTSUPP;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 19 | 100.00% | 1 | 100.00% |
Total | 19 | 100.00% | 1 | 100.00% |
static void cls_cgroup_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
struct cls_cgroup_head *head = rtnl_dereference(tp->root);
if (arg->count < arg->skip)
goto skip;
if (arg->fn(tp, (unsigned long) head, arg) < 0) {
arg->stop = 1;
return;
}
skip:
arg->count++;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 73 | 96.05% | 1 | 50.00% |
John Fastabend | 3 | 3.95% | 1 | 50.00% |
Total | 76 | 100.00% | 2 | 100.00% |
static int cls_cgroup_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
struct sk_buff *skb, struct tcmsg *t)
{
struct cls_cgroup_head *head = rtnl_dereference(tp->root);
struct nlattr *nest;
t->tcm_handle = head->handle;
nest = nla_nest_start(skb, TCA_OPTIONS);
if (nest == NULL)
goto nla_put_failure;
if (tcf_exts_dump(skb, &head->exts) < 0 ||
tcf_em_tree_dump(skb, &head->ematches, TCA_CGROUP_EMATCHES) < 0)
goto nla_put_failure;
nla_nest_end(skb, nest);
if (tcf_exts_dump_stats(skb, &head->exts) < 0)
goto nla_put_failure;
return skb->len;
nla_put_failure:
nla_nest_cancel(skb, nest);
return -1;
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 136 | 93.15% | 1 | 25.00% |
Américo Wang | 5 | 3.42% | 1 | 25.00% |
John Fastabend | 3 | 2.05% | 1 | 25.00% |
Jiri Pirko | 2 | 1.37% | 1 | 25.00% |
Total | 146 | 100.00% | 4 | 100.00% |
static struct tcf_proto_ops cls_cgroup_ops __read_mostly = {
.kind = "cgroup",
.init = cls_cgroup_init,
.change = cls_cgroup_change,
.classify = cls_cgroup_classify,
.destroy = cls_cgroup_destroy,
.get = cls_cgroup_get,
.delete = cls_cgroup_delete,
.walk = cls_cgroup_walk,
.dump = cls_cgroup_dump,
.owner = THIS_MODULE,
};
static int __init init_cgroup_cls(void)
{
return register_tcf_proto_ops(&cls_cgroup_ops);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 10 | 62.50% | 1 | 25.00% |
Ben Blum | 3 | 18.75% | 1 | 25.00% |
Herbert Xu | 2 | 12.50% | 1 | 25.00% |
Daniel Borkmann | 1 | 6.25% | 1 | 25.00% |
Total | 16 | 100.00% | 4 | 100.00% |
static void __exit exit_cgroup_cls(void)
{
unregister_tcf_proto_ops(&cls_cgroup_ops);
}
Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 15 | 100.00% | 1 | 100.00% |
Total | 15 | 100.00% | 1 | 100.00% |
module_init(init_cgroup_cls);
module_exit(exit_cgroup_cls);
MODULE_LICENSE("GPL");
Overall Contributors
Person | Tokens | Prop | Commits | CommitProp |
Thomas Graf | 696 | 69.18% | 1 | 4.35% |
John Fastabend | 167 | 16.60% | 4 | 17.39% |
Américo Wang | 53 | 5.27% | 3 | 13.04% |
Cong Wang | 20 | 1.99% | 2 | 8.70% |
Paul Menage | 16 | 1.59% | 1 | 4.35% |
Herbert Xu | 13 | 1.29% | 1 | 4.35% |
Minoru Usui | 12 | 1.19% | 1 | 4.35% |
Benjamin LaHaise | 7 | 0.70% | 1 | 4.35% |
Daniel Borkmann | 6 | 0.60% | 3 | 13.04% |
Eric W. Biedermann | 5 | 0.50% | 1 | 4.35% |
Tejun Heo | 3 | 0.30% | 1 | 4.35% |
Ben Blum | 3 | 0.30% | 1 | 4.35% |
Jiri Pirko | 2 | 0.20% | 1 | 4.35% |
Patrick McHardy | 2 | 0.20% | 1 | 4.35% |
Eric Dumazet | 1 | 0.10% | 1 | 4.35% |
Total | 1006 | 100.00% | 23 | 100.00% |
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