Release 4.14 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;
union {
struct work_struct work;
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 void *cls_cgroup_get(struct tcf_proto *tp, u32 handle)
{
return NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Graf | 15 | 83.33% | 1 | 50.00% |
| Américo Wang | 3 | 16.67% | 1 | 50.00% |
| Total | 18 | 100.00% | 2 | 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(struct cls_cgroup_head *head)
{
tcf_exts_destroy(&head->exts);
tcf_em_tree_destroy(&head->ematches);
tcf_exts_put_net(&head->exts);
kfree(head);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Américo Wang | 40 | 100.00% | 1 | 100.00% |
| Total | 40 | 100.00% | 1 | 100.00% |
static void cls_cgroup_destroy_work(struct work_struct *work)
{
struct cls_cgroup_head *head = container_of(work,
struct cls_cgroup_head,
work);
rtnl_lock();
__cls_cgroup_destroy(head);
rtnl_unlock();
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| John Fastabend | 24 | 64.86% | 1 | 33.33% |
| Américo Wang | 13 | 35.14% | 2 | 66.67% |
| Total | 37 | 100.00% | 3 | 100.00% |
static void cls_cgroup_destroy_rcu(struct rcu_head *root)
{
struct cls_cgroup_head *head = container_of(root,
struct cls_cgroup_head,
rcu);
INIT_WORK(&head->work, cls_cgroup_destroy_work);
tcf_queue_work(&head->work);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Américo Wang | 43 | 97.73% | 1 | 50.00% |
| John Fastabend | 1 | 2.27% | 1 | 50.00% |
| Total | 44 | 100.00% | 2 | 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,
void **arg, bool ovr)
{
struct nlattr *tb[TCA_CGROUP_MAX + 1];
struct cls_cgroup_head *head = rtnl_dereference(tp->root);
struct cls_cgroup_head *new;
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, NULL);
if (err < 0)
goto errout;
err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &new->exts, ovr);
if (err < 0)
goto errout;
err = tcf_em_tree_validate(tp, tb[TCA_CGROUP_EMATCHES], &new->ematches);
if (err < 0)
goto errout;
rcu_assign_pointer(tp->root, new);
if (head) {
tcf_exts_get_net(&head->exts);
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 | 153 | 50.00% | 1 | 7.14% |
| John Fastabend | 83 | 27.12% | 3 | 21.43% |
| Américo Wang | 33 | 10.78% | 3 | 21.43% |
| Minoru Usui | 12 | 3.92% | 1 | 7.14% |
| Benjamin LaHaise | 7 | 2.29% | 1 | 7.14% |
| Jiri Pirko | 6 | 1.96% | 2 | 14.29% |
| Cong Wang | 5 | 1.63% | 1 | 7.14% |
| Eric W. Biedermann | 5 | 1.63% | 1 | 7.14% |
| Johannes Berg | 2 | 0.65% | 1 | 7.14% |
| Total | 306 | 100.00% | 14 | 100.00% |
static void cls_cgroup_destroy(struct tcf_proto *tp)
{
struct cls_cgroup_head *head = rtnl_dereference(tp->root);
/* Head can still be NULL due to cls_cgroup_init(). */
if (head) {
if (tcf_exts_get_net(&head->exts))
call_rcu(&head->rcu, cls_cgroup_destroy_rcu);
else
__cls_cgroup_destroy(head);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Graf | 23 | 41.07% | 1 | 12.50% |
| Américo Wang | 19 | 33.93% | 2 | 25.00% |
| John Fastabend | 9 | 16.07% | 2 | 25.00% |
| Cong Wang | 2 | 3.57% | 1 | 12.50% |
| Patrick McHardy | 2 | 3.57% | 1 | 12.50% |
| Daniel Borkmann | 1 | 1.79% | 1 | 12.50% |
| Total | 56 | 100.00% | 8 | 100.00% |
static int cls_cgroup_delete(struct tcf_proto *tp, void *arg, bool *last)
{
return -EOPNOTSUPP;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Graf | 17 | 73.91% | 1 | 33.33% |
| Américo Wang | 6 | 26.09% | 2 | 66.67% |
| Total | 23 | 100.00% | 3 | 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, head, arg) < 0) {
arg->stop = 1;
return;
}
skip:
arg->count++;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Thomas Graf | 69 | 95.83% | 1 | 50.00% |
| John Fastabend | 3 | 4.17% | 1 | 50.00% |
| Total | 72 | 100.00% | 2 | 100.00% |
static int cls_cgroup_dump(struct net *net, struct tcf_proto *tp, void *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 | 134 | 91.78% | 1 | 20.00% |
| Américo Wang | 7 | 4.79% | 2 | 40.00% |
| John Fastabend | 3 | 2.05% | 1 | 20.00% |
| Jiri Pirko | 2 | 1.37% | 1 | 20.00% |
| Total | 146 | 100.00% | 5 | 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 | 645 | 62.20% | 1 | 3.45% |
| Américo Wang | 172 | 16.59% | 6 | 20.69% |
| John Fastabend | 135 | 13.02% | 4 | 13.79% |
| Paul Menage | 16 | 1.54% | 1 | 3.45% |
| Herbert Xu | 13 | 1.25% | 1 | 3.45% |
| Minoru Usui | 12 | 1.16% | 1 | 3.45% |
| Jiri Pirko | 8 | 0.77% | 3 | 10.34% |
| Cong Wang | 7 | 0.68% | 2 | 6.90% |
| Benjamin LaHaise | 7 | 0.68% | 1 | 3.45% |
| Daniel Borkmann | 6 | 0.58% | 3 | 10.34% |
| Eric W. Biedermann | 5 | 0.48% | 1 | 3.45% |
| Ben Blum | 3 | 0.29% | 1 | 3.45% |
| Tejun Heo | 3 | 0.29% | 1 | 3.45% |
| Patrick McHardy | 2 | 0.19% | 1 | 3.45% |
| Johannes Berg | 2 | 0.19% | 1 | 3.45% |
| Eric Dumazet | 1 | 0.10% | 1 | 3.45% |
| Total | 1037 | 100.00% | 29 | 100.00% |
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