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Release 4.11 net/sched/cls_cgroup.c

Directory: net/sched
/*
 * 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

PersonTokensPropCommitsCommitProp
Thomas Graf6972.63%116.67%
Paul Menage1616.84%116.67%
Daniel Borkmann44.21%116.67%
John Fastabend33.16%116.67%
Herbert Xu22.11%116.67%
Eric Dumazet11.05%116.67%
Total95100.00%6100.00%


static unsigned long cls_cgroup_get(struct tcf_proto *tp, u32 handle) { return 0UL; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf18100.00%1100.00%
Total18100.00%1100.00%


static int cls_cgroup_init(struct tcf_proto *tp) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf14100.00%1100.00%
Total14100.00%1100.00%

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

PersonTokensPropCommitsCommitProp
John Fastabend47100.00%1100.00%
Total47100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Thomas Graf19152.91%110.00%
John Fastabend9325.76%330.00%
Américo Wang4813.30%220.00%
Minoru Usui123.32%110.00%
Benjamin LaHaise71.94%110.00%
Eric W. Biedermann51.39%110.00%
Cong Wang51.39%110.00%
Total361100.00%10100.00%


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

PersonTokensPropCommitsCommitProp
Thomas Graf2548.08%116.67%
Cong Wang1528.85%116.67%
John Fastabend917.31%233.33%
Patrick McHardy23.85%116.67%
Daniel Borkmann11.92%116.67%
Total52100.00%6100.00%


static int cls_cgroup_delete(struct tcf_proto *tp, unsigned long arg) { return -EOPNOTSUPP; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf19100.00%1100.00%
Total19100.00%1100.00%


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

PersonTokensPropCommitsCommitProp
Thomas Graf7396.05%150.00%
John Fastabend33.95%150.00%
Total76100.00%2100.00%


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

PersonTokensPropCommitsCommitProp
Thomas Graf13693.15%125.00%
Américo Wang53.42%125.00%
John Fastabend32.05%125.00%
Jiri Pirko21.37%125.00%
Total146100.00%4100.00%

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

PersonTokensPropCommitsCommitProp
Thomas Graf1062.50%125.00%
Ben Blum318.75%125.00%
Herbert Xu212.50%125.00%
Daniel Borkmann16.25%125.00%
Total16100.00%4100.00%


static void __exit exit_cgroup_cls(void) { unregister_tcf_proto_ops(&cls_cgroup_ops); }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf15100.00%1100.00%
Total15100.00%1100.00%

module_init(init_cgroup_cls); module_exit(exit_cgroup_cls); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Thomas Graf69669.18%14.35%
John Fastabend16716.60%417.39%
Américo Wang535.27%313.04%
Cong Wang201.99%28.70%
Paul Menage161.59%14.35%
Herbert Xu131.29%14.35%
Minoru Usui121.19%14.35%
Benjamin LaHaise70.70%14.35%
Daniel Borkmann60.60%313.04%
Eric W. Biedermann50.50%14.35%
Tejun Heo30.30%14.35%
Ben Blum30.30%14.35%
Jiri Pirko20.20%14.35%
Patrick McHardy20.20%14.35%
Eric Dumazet10.10%14.35%
Total1006100.00%23100.00%
Directory: net/sched
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