2 * net/sched/cls_matchll.c Match-all classifier
4 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
12 #include <linux/kernel.h>
13 #include <linux/init.h>
14 #include <linux/module.h>
16 #include <net/sch_generic.h>
17 #include <net/pkt_cls.h>
19 struct cls_mall_head {
21 struct tcf_result res;
24 unsigned int in_hw_count;
25 struct rcu_work rwork;
28 static int mall_classify(struct sk_buff *skb, const struct tcf_proto *tp,
29 struct tcf_result *res)
31 struct cls_mall_head *head = rcu_dereference_bh(tp->root);
33 if (tc_skip_sw(head->flags))
37 return tcf_exts_exec(skb, &head->exts, res);
40 static int mall_init(struct tcf_proto *tp)
45 static void __mall_destroy(struct cls_mall_head *head)
47 tcf_exts_destroy(&head->exts);
48 tcf_exts_put_net(&head->exts);
52 static void mall_destroy_work(struct work_struct *work)
54 struct cls_mall_head *head = container_of(to_rcu_work(work),
62 static void mall_destroy_hw_filter(struct tcf_proto *tp,
63 struct cls_mall_head *head,
65 struct netlink_ext_ack *extack)
67 struct tc_cls_matchall_offload cls_mall = {};
68 struct tcf_block *block = tp->chain->block;
70 tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
71 cls_mall.command = TC_CLSMATCHALL_DESTROY;
72 cls_mall.cookie = cookie;
74 tc_setup_cb_call(block, NULL, TC_SETUP_CLSMATCHALL, &cls_mall, false);
75 tcf_block_offload_dec(block, &head->flags);
78 static int mall_replace_hw_filter(struct tcf_proto *tp,
79 struct cls_mall_head *head,
81 struct netlink_ext_ack *extack)
83 struct tc_cls_matchall_offload cls_mall = {};
84 struct tcf_block *block = tp->chain->block;
85 bool skip_sw = tc_skip_sw(head->flags);
88 tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
89 cls_mall.command = TC_CLSMATCHALL_REPLACE;
90 cls_mall.exts = &head->exts;
91 cls_mall.cookie = cookie;
93 err = tc_setup_cb_call(block, NULL, TC_SETUP_CLSMATCHALL,
96 mall_destroy_hw_filter(tp, head, cookie, NULL);
99 head->in_hw_count = err;
100 tcf_block_offload_inc(block, &head->flags);
103 if (skip_sw && !(head->flags & TCA_CLS_FLAGS_IN_HW))
109 static void mall_destroy(struct tcf_proto *tp, struct netlink_ext_ack *extack)
111 struct cls_mall_head *head = rtnl_dereference(tp->root);
116 tcf_unbind_filter(tp, &head->res);
118 if (!tc_skip_hw(head->flags))
119 mall_destroy_hw_filter(tp, head, (unsigned long) head, extack);
121 if (tcf_exts_get_net(&head->exts))
122 tcf_queue_work(&head->rwork, mall_destroy_work);
124 __mall_destroy(head);
127 static void *mall_get(struct tcf_proto *tp, u32 handle)
132 static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
133 [TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC },
134 [TCA_MATCHALL_CLASSID] = { .type = NLA_U32 },
137 static int mall_set_parms(struct net *net, struct tcf_proto *tp,
138 struct cls_mall_head *head,
139 unsigned long base, struct nlattr **tb,
140 struct nlattr *est, bool ovr,
141 struct netlink_ext_ack *extack)
145 err = tcf_exts_validate(net, tp, tb, est, &head->exts, ovr, extack);
149 if (tb[TCA_MATCHALL_CLASSID]) {
150 head->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]);
151 tcf_bind_filter(tp, &head->res, base);
156 static int mall_change(struct net *net, struct sk_buff *in_skb,
157 struct tcf_proto *tp, unsigned long base,
158 u32 handle, struct nlattr **tca,
159 void **arg, bool ovr, struct netlink_ext_ack *extack)
161 struct cls_mall_head *head = rtnl_dereference(tp->root);
162 struct nlattr *tb[TCA_MATCHALL_MAX + 1];
163 struct cls_mall_head *new;
167 if (!tca[TCA_OPTIONS])
173 err = nla_parse_nested(tb, TCA_MATCHALL_MAX, tca[TCA_OPTIONS],
178 if (tb[TCA_MATCHALL_FLAGS]) {
179 flags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]);
180 if (!tc_flags_valid(flags))
184 new = kzalloc(sizeof(*new), GFP_KERNEL);
188 err = tcf_exts_init(&new->exts, TCA_MATCHALL_ACT, 0);
194 new->handle = handle;
197 err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE], ovr,
202 if (!tc_skip_hw(new->flags)) {
203 err = mall_replace_hw_filter(tp, new, (unsigned long)new,
206 goto err_replace_hw_filter;
209 if (!tc_in_hw(new->flags))
210 new->flags |= TCA_CLS_FLAGS_NOT_IN_HW;
213 rcu_assign_pointer(tp->root, new);
216 err_replace_hw_filter:
218 tcf_exts_destroy(&new->exts);
224 static int mall_delete(struct tcf_proto *tp, void *arg, bool *last,
225 struct netlink_ext_ack *extack)
230 static void mall_walk(struct tcf_proto *tp, struct tcf_walker *arg)
232 struct cls_mall_head *head = rtnl_dereference(tp->root);
234 if (arg->count < arg->skip)
236 if (arg->fn(tp, head, arg) < 0)
242 static int mall_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
243 void *cb_priv, struct netlink_ext_ack *extack)
245 struct cls_mall_head *head = rtnl_dereference(tp->root);
246 struct tc_cls_matchall_offload cls_mall = {};
247 struct tcf_block *block = tp->chain->block;
250 if (tc_skip_hw(head->flags))
253 tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
254 cls_mall.command = add ?
255 TC_CLSMATCHALL_REPLACE : TC_CLSMATCHALL_DESTROY;
256 cls_mall.exts = &head->exts;
257 cls_mall.cookie = (unsigned long)head;
259 err = cb(TC_SETUP_CLSMATCHALL, &cls_mall, cb_priv);
261 if (add && tc_skip_sw(head->flags))
266 tc_cls_offload_cnt_update(block, &head->in_hw_count, &head->flags, add);
271 static int mall_dump(struct net *net, struct tcf_proto *tp, void *fh,
272 struct sk_buff *skb, struct tcmsg *t)
274 struct cls_mall_head *head = fh;
280 t->tcm_handle = head->handle;
282 nest = nla_nest_start(skb, TCA_OPTIONS);
284 goto nla_put_failure;
286 if (head->res.classid &&
287 nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid))
288 goto nla_put_failure;
290 if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags))
291 goto nla_put_failure;
293 if (tcf_exts_dump(skb, &head->exts))
294 goto nla_put_failure;
296 nla_nest_end(skb, nest);
298 if (tcf_exts_dump_stats(skb, &head->exts) < 0)
299 goto nla_put_failure;
304 nla_nest_cancel(skb, nest);
308 static void mall_bind_class(void *fh, u32 classid, unsigned long cl)
310 struct cls_mall_head *head = fh;
312 if (head && head->res.classid == classid)
313 head->res.class = cl;
316 static struct tcf_proto_ops cls_mall_ops __read_mostly = {
318 .classify = mall_classify,
320 .destroy = mall_destroy,
322 .change = mall_change,
323 .delete = mall_delete,
325 .reoffload = mall_reoffload,
327 .bind_class = mall_bind_class,
328 .owner = THIS_MODULE,
331 static int __init cls_mall_init(void)
333 return register_tcf_proto_ops(&cls_mall_ops);
336 static void __exit cls_mall_exit(void)
338 unregister_tcf_proto_ops(&cls_mall_ops);
341 module_init(cls_mall_init);
342 module_exit(cls_mall_exit);
344 MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
345 MODULE_DESCRIPTION("Match-all classifier");
346 MODULE_LICENSE("GPL v2");