1f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf/* 2f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * net/sched/cls_cgroup.c Control Group Classifier 3f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * 4f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * This program is free software; you can redistribute it and/or 5f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * modify it under the terms of the GNU General Public License 6f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * as published by the Free Software Foundation; either version 7f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * 2 of the License, or (at your option) any later version. 8f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * 9f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * Authors: Thomas Graf <tgraf@suug.ch> 10f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf */ 11f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 12f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf#include <linux/module.h> 135a0e3ad6af8660be21ca98a971cd00f331318c05Tejun Heo#include <linux/slab.h> 14f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf#include <linux/skbuff.h> 15f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu#include <linux/rcupdate.h> 16f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf#include <net/rtnetlink.h> 17f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf#include <net/pkt_cls.h> 18f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu#include <net/sock.h> 19f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu#include <net/cls_cgroup.h> 20f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 21cc7ec456f82da7f89a5b376e613b3ac4311b3e9aEric Dumazetstruct cls_cgroup_head { 22f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf u32 handle; 23f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf struct tcf_exts exts; 24f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf struct tcf_ematch_tree ematches; 25952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct tcf_proto *tp; 26952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct rcu_head rcu; 27f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf}; 28f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 29dc7f9f6e8838556f226c2ebd1da7bb305cb25654Eric Dumazetstatic int cls_cgroup_classify(struct sk_buff *skb, const struct tcf_proto *tp, 30f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf struct tcf_result *res) 31f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 32952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head *head = rcu_dereference_bh(tp->root); 33e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage u32 classid; 34f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 35f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu classid = task_cls_state(current)->classid; 36f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu 37f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf /* 38f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * Due to the nature of the classifier it is required to ignore all 39f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * packets originating from softirq context as accessing `current' 40f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * would lead to false results. 41f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * 42f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * This test assumes that all callers of dev_queue_xmit() explicitely 43f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * disable bh. Knowing this, it is possible to detect softirq based 44f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * calls by looking at the number of nested bh disable calls because 45f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf * softirqs always disables bh. 46f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf */ 4775e1056f5c57050415b64cb761a3acc35d91f013Venkatesh Pallipadi if (in_serving_softirq()) { 48f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu /* If there is an sk_classid we'll use that. */ 49f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu if (!skb->sk) 50f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu return -1; 51f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu classid = skb->sk->sk_classid; 52f845172531fb7410c7fb7780b1a6e51ee6df7d52Herbert Xu } 53f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 54e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage if (!classid) 55e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage return -1; 56e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage 57e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage if (!tcf_em_tree_match(skb, &head->ematches, NULL)) 58e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage return -1; 59e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage 60e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage res->classid = classid; 61e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage res->class = 0; 62e65fcfd63a9a62baa5708484ff8edbe56eb3e7ecPaul Menage return tcf_exts_exec(skb, &head->exts, res); 63f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 64f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 65f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic unsigned long cls_cgroup_get(struct tcf_proto *tp, u32 handle) 66f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 67f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf return 0UL; 68f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 69f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 70f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic void cls_cgroup_put(struct tcf_proto *tp, unsigned long f) 71f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 72f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 73f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 74f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic int cls_cgroup_init(struct tcf_proto *tp) 75f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 76f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf return 0; 77f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 78f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 79f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic const struct nla_policy cgroup_policy[TCA_CGROUP_MAX + 1] = { 80f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf [TCA_CGROUP_EMATCHES] = { .type = NLA_NESTED }, 81f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf}; 82f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 83952313bd62589cae216a579bb7ebc76f8e290817John Fastabendstatic void cls_cgroup_destroy_rcu(struct rcu_head *root) 84952313bd62589cae216a579bb7ebc76f8e290817John Fastabend{ 85952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head *head = container_of(root, 86952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head, 87952313bd62589cae216a579bb7ebc76f8e290817John Fastabend rcu); 88952313bd62589cae216a579bb7ebc76f8e290817John Fastabend 8918d0264f630e200772bf236ac5747c47e908501eWANG Cong tcf_exts_destroy(&head->exts); 9082a470f1119eb7d2e4941b915bf9cd6fd8d54494John Fastabend tcf_em_tree_destroy(&head->ematches); 91952313bd62589cae216a579bb7ebc76f8e290817John Fastabend kfree(head); 92952313bd62589cae216a579bb7ebc76f8e290817John Fastabend} 93952313bd62589cae216a579bb7ebc76f8e290817John Fastabend 94c1b52739e45f5969b208ebc377f52468280af11eBenjamin LaHaisestatic int cls_cgroup_change(struct net *net, struct sk_buff *in_skb, 95af4c6641f5ad445fe6d0832da42406dbd9a37ce4Eric W. Biederman struct tcf_proto *tp, unsigned long base, 96f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf u32 handle, struct nlattr **tca, 972f7ef2f8790f5bf53db4fc6b2310943139285827Cong Wang unsigned long *arg, bool ovr) 98f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 99cc7ec456f82da7f89a5b376e613b3ac4311b3e9aEric Dumazet struct nlattr *tb[TCA_CGROUP_MAX + 1]; 100952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head *head = rtnl_dereference(tp->root); 101952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head *new; 102f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf struct tcf_ematch_tree t; 103f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf struct tcf_exts e; 104f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf int err; 105f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 10652ea3a56a3268bc2a5a7c75e98c81463004e38efMinoru Usui if (!tca[TCA_OPTIONS]) 10752ea3a56a3268bc2a5a7c75e98c81463004e38efMinoru Usui return -EINVAL; 10852ea3a56a3268bc2a5a7c75e98c81463004e38efMinoru Usui 109952313bd62589cae216a579bb7ebc76f8e290817John Fastabend if (!head && !handle) 110952313bd62589cae216a579bb7ebc76f8e290817John Fastabend return -EINVAL; 111f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 112952313bd62589cae216a579bb7ebc76f8e290817John Fastabend if (head && handle != head->handle) 113952313bd62589cae216a579bb7ebc76f8e290817John Fastabend return -ENOENT; 114f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 115952313bd62589cae216a579bb7ebc76f8e290817John Fastabend new = kzalloc(sizeof(*head), GFP_KERNEL); 116952313bd62589cae216a579bb7ebc76f8e290817John Fastabend if (!new) 117952313bd62589cae216a579bb7ebc76f8e290817John Fastabend return -ENOBUFS; 118f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 1199f6c38e70b6c7ea379394a755fe76e09996f5370John Fastabend tcf_exts_init(&new->exts, TCA_CGROUP_ACT, TCA_CGROUP_POLICE); 1209f6c38e70b6c7ea379394a755fe76e09996f5370John Fastabend if (head) 121952313bd62589cae216a579bb7ebc76f8e290817John Fastabend new->handle = head->handle; 1229f6c38e70b6c7ea379394a755fe76e09996f5370John Fastabend else 123952313bd62589cae216a579bb7ebc76f8e290817John Fastabend new->handle = handle; 124f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 125952313bd62589cae216a579bb7ebc76f8e290817John Fastabend new->tp = tp; 126f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf err = nla_parse_nested(tb, TCA_CGROUP_MAX, tca[TCA_OPTIONS], 127f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf cgroup_policy); 128f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf if (err < 0) 129d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabend goto errout; 130f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 1315da57f422d89c504a1d72dadd4e19d3dca8e974eWANG Cong tcf_exts_init(&e, TCA_CGROUP_ACT, TCA_CGROUP_POLICE); 1322f7ef2f8790f5bf53db4fc6b2310943139285827Cong Wang err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr); 133f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf if (err < 0) 134d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabend goto errout; 135f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 136f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf err = tcf_em_tree_validate(tp, tb[TCA_CGROUP_EMATCHES], &t); 137d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabend if (err < 0) { 13818d0264f630e200772bf236ac5747c47e908501eWANG Cong tcf_exts_destroy(&e); 139d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabend goto errout; 140d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabend } 141f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 142952313bd62589cae216a579bb7ebc76f8e290817John Fastabend tcf_exts_change(tp, &new->exts, &e); 143952313bd62589cae216a579bb7ebc76f8e290817John Fastabend tcf_em_tree_change(tp, &new->ematches, &t); 144f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 145952313bd62589cae216a579bb7ebc76f8e290817John Fastabend rcu_assign_pointer(tp->root, new); 146952313bd62589cae216a579bb7ebc76f8e290817John Fastabend if (head) 147952313bd62589cae216a579bb7ebc76f8e290817John Fastabend call_rcu(&head->rcu, cls_cgroup_destroy_rcu); 148f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf return 0; 149d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabenderrout: 150d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabend kfree(new); 151d14cbfc88ff87e5054d67fde3ba5f4c20b773dabJohn Fastabend return err; 152f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 153f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 154f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic void cls_cgroup_destroy(struct tcf_proto *tp) 155f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 156952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head *head = rtnl_dereference(tp->root); 157f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 158f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf if (head) { 159952313bd62589cae216a579bb7ebc76f8e290817John Fastabend RCU_INIT_POINTER(tp->root, NULL); 16013990f8156862fe945a1a226850a6550c8988a33John Fastabend call_rcu(&head->rcu, cls_cgroup_destroy_rcu); 161f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf } 162f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 163f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 164f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic int cls_cgroup_delete(struct tcf_proto *tp, unsigned long arg) 165f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 166f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf return -EOPNOTSUPP; 167f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 168f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 169f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic void cls_cgroup_walk(struct tcf_proto *tp, struct tcf_walker *arg) 170f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 171952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head *head = rtnl_dereference(tp->root); 172f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 173f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf if (arg->count < arg->skip) 174f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf goto skip; 175f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 176f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf if (arg->fn(tp, (unsigned long) head, arg) < 0) { 177f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf arg->stop = 1; 178f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf return; 179f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf } 180f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafskip: 181f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf arg->count++; 182f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 183f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 184832d1d5bfaefafa5aa40282f6765c6d996fe384eWANG Congstatic int cls_cgroup_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, 185f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf struct sk_buff *skb, struct tcmsg *t) 186f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 187952313bd62589cae216a579bb7ebc76f8e290817John Fastabend struct cls_cgroup_head *head = rtnl_dereference(tp->root); 188f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf unsigned char *b = skb_tail_pointer(skb); 189f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf struct nlattr *nest; 190f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 191f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf t->tcm_handle = head->handle; 192f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 193f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf nest = nla_nest_start(skb, TCA_OPTIONS); 194f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf if (nest == NULL) 195f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf goto nla_put_failure; 196f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 1975da57f422d89c504a1d72dadd4e19d3dca8e974eWANG Cong if (tcf_exts_dump(skb, &head->exts) < 0 || 198f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf tcf_em_tree_dump(skb, &head->ematches, TCA_CGROUP_EMATCHES) < 0) 199f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf goto nla_put_failure; 200f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 201f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf nla_nest_end(skb, nest); 202f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 2035da57f422d89c504a1d72dadd4e19d3dca8e974eWANG Cong if (tcf_exts_dump_stats(skb, &head->exts) < 0) 204f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf goto nla_put_failure; 205f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 206f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf return skb->len; 207f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 208f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafnla_put_failure: 209f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf nlmsg_trim(skb, b); 210f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf return -1; 211f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 212f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 213f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic struct tcf_proto_ops cls_cgroup_ops __read_mostly = { 214f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .kind = "cgroup", 215f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .init = cls_cgroup_init, 216f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .change = cls_cgroup_change, 217f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .classify = cls_cgroup_classify, 218f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .destroy = cls_cgroup_destroy, 219f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .get = cls_cgroup_get, 220f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .put = cls_cgroup_put, 221f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .delete = cls_cgroup_delete, 222f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .walk = cls_cgroup_walk, 223f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .dump = cls_cgroup_dump, 224f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf .owner = THIS_MODULE, 225f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf}; 226f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 227f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic int __init init_cgroup_cls(void) 228f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 229fe1217c4f3f7d7cbf8efdd8dd5fdc7204a1d65a8Daniel Borkmann return register_tcf_proto_ops(&cls_cgroup_ops); 230f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 231f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 232f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafstatic void __exit exit_cgroup_cls(void) 233f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf{ 234f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf unregister_tcf_proto_ops(&cls_cgroup_ops); 235f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf} 236f400923735ecbb67cbe4a3606c9479f694754f51Thomas Graf 237f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafmodule_init(init_cgroup_cls); 238f400923735ecbb67cbe4a3606c9479f694754f51Thomas Grafmodule_exit(exit_cgroup_cls); 239f400923735ecbb67cbe4a3606c9479f694754f51Thomas GrafMODULE_LICENSE("GPL"); 240