[linux-2.6-block.git] / net / sched / cls_matchall.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * net/sched/cls_matchll.c		Match-all classifier
 *
 * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/percpu.h>

#include <net/sch_generic.h>
#include <net/pkt_cls.h>

struct cls_mall_head {
	struct tcf_exts exts;
	struct tcf_result res;
	u32 handle;
	u32 flags;
	unsigned int in_hw_count;
	struct tc_matchall_pcnt __percpu *pf;
	struct rcu_work rwork;
};

static int mall_classify(struct sk_buff *skb, const struct tcf_proto *tp,
			 struct tcf_result *res)
{
	struct cls_mall_head *head = rcu_dereference_bh(tp->root);

	if (unlikely(!head))
		return -1;

	if (tc_skip_sw(head->flags))
		return -1;

	*res = head->res;
	__this_cpu_inc(head->pf->rhit);
	return tcf_exts_exec(skb, &head->exts, res);
}

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

static void __mall_destroy(struct cls_mall_head *head)
{
	tcf_exts_destroy(&head->exts);
	tcf_exts_put_net(&head->exts);
	free_percpu(head->pf);
	kfree(head);
}

static void mall_destroy_work(struct work_struct *work)
{
	struct cls_mall_head *head = container_of(to_rcu_work(work),
						  struct cls_mall_head,
						  rwork);
	rtnl_lock();
	__mall_destroy(head);
	rtnl_unlock();
}

static void mall_destroy_hw_filter(struct tcf_proto *tp,
				   struct cls_mall_head *head,
				   unsigned long cookie,
				   struct netlink_ext_ack *extack)
{
	struct tc_cls_matchall_offload cls_mall = {};
	struct tcf_block *block = tp->chain->block;

	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
	cls_mall.command = TC_CLSMATCHALL_DESTROY;
	cls_mall.cookie = cookie;

	tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, false);
	tcf_block_offload_dec(block, &head->flags);
}

static int mall_replace_hw_filter(struct tcf_proto *tp,
				  struct cls_mall_head *head,
				  unsigned long cookie,
				  struct netlink_ext_ack *extack)
{
	struct tc_cls_matchall_offload cls_mall = {};
	struct tcf_block *block = tp->chain->block;
	bool skip_sw = tc_skip_sw(head->flags);
	int err;

	cls_mall.rule =	flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	if (!cls_mall.rule)
		return -ENOMEM;

	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
	cls_mall.command = TC_CLSMATCHALL_REPLACE;
	cls_mall.cookie = cookie;

	err = tc_setup_flow_action(&cls_mall.rule->action, &head->exts);
	if (err) {
		kfree(cls_mall.rule);
		mall_destroy_hw_filter(tp, head, cookie, NULL);
		if (skip_sw)
			NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
		else
			err = 0;

		return err;
	}

	err = tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, skip_sw);
	kfree(cls_mall.rule);

	if (err < 0) {
		mall_destroy_hw_filter(tp, head, cookie, NULL);
		return err;
	} else if (err > 0) {
		head->in_hw_count = err;
		tcf_block_offload_inc(block, &head->flags);
	}

	if (skip_sw && !(head->flags & TCA_CLS_FLAGS_IN_HW))
		return -EINVAL;

	return 0;
}

static void mall_destroy(struct tcf_proto *tp, bool rtnl_held,
			 struct netlink_ext_ack *extack)
{
	struct cls_mall_head *head = rtnl_dereference(tp->root);

	if (!head)
		return;

	tcf_unbind_filter(tp, &head->res);

	if (!tc_skip_hw(head->flags))
		mall_destroy_hw_filter(tp, head, (unsigned long) head, extack);

	if (tcf_exts_get_net(&head->exts))
		tcf_queue_work(&head->rwork, mall_destroy_work);
	else
		__mall_destroy(head);
}

static void *mall_get(struct tcf_proto *tp, u32 handle)
{
	struct cls_mall_head *head = rtnl_dereference(tp->root);

	if (head && head->handle == handle)
		return head;

	return NULL;
}

static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
	[TCA_MATCHALL_UNSPEC]		= { .type = NLA_UNSPEC },
	[TCA_MATCHALL_CLASSID]		= { .type = NLA_U32 },
};

static int mall_set_parms(struct net *net, struct tcf_proto *tp,
			  struct cls_mall_head *head,
			  unsigned long base, struct nlattr **tb,
			  struct nlattr *est, bool ovr,
			  struct netlink_ext_ack *extack)
{
	int err;

	err = tcf_exts_validate(net, tp, tb, est, &head->exts, ovr, true,
				extack);
	if (err < 0)
		return err;

	if (tb[TCA_MATCHALL_CLASSID]) {
		head->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]);
		tcf_bind_filter(tp, &head->res, base);
	}
	return 0;
}

static int mall_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, bool rtnl_held,
		       struct netlink_ext_ack *extack)
{
	struct cls_mall_head *head = rtnl_dereference(tp->root);
	struct nlattr *tb[TCA_MATCHALL_MAX + 1];
	struct cls_mall_head *new;
	u32 flags = 0;
	int err;

	if (!tca[TCA_OPTIONS])
		return -EINVAL;

	if (head)
		return -EEXIST;

	err = nla_parse_nested_deprecated(tb, TCA_MATCHALL_MAX,
					  tca[TCA_OPTIONS], mall_policy, NULL);
	if (err < 0)
		return err;

	if (tb[TCA_MATCHALL_FLAGS]) {
		flags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]);
		if (!tc_flags_valid(flags))
			return -EINVAL;
	}

	new = kzalloc(sizeof(*new), GFP_KERNEL);
	if (!new)
		return -ENOBUFS;

	err = tcf_exts_init(&new->exts, net, TCA_MATCHALL_ACT, 0);
	if (err)
		goto err_exts_init;

	if (!handle)
		handle = 1;
	new->handle = handle;
	new->flags = flags;
	new->pf = alloc_percpu(struct tc_matchall_pcnt);
	if (!new->pf) {
		err = -ENOMEM;
		goto err_alloc_percpu;
	}

	err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE], ovr,
			     extack);
	if (err)
		goto err_set_parms;

	if (!tc_skip_hw(new->flags)) {
		err = mall_replace_hw_filter(tp, new, (unsigned long)new,
					     extack);
		if (err)
			goto err_replace_hw_filter;
	}

	if (!tc_in_hw(new->flags))
		new->flags |= TCA_CLS_FLAGS_NOT_IN_HW;

	*arg = head;
	rcu_assign_pointer(tp->root, new);
	return 0;

err_replace_hw_filter:
err_set_parms:
	free_percpu(new->pf);
err_alloc_percpu:
	tcf_exts_destroy(&new->exts);
err_exts_init:
	kfree(new);
	return err;
}

static int mall_delete(struct tcf_proto *tp, void *arg, bool *last,
		       bool rtnl_held, struct netlink_ext_ack *extack)
{
	return -EOPNOTSUPP;
}

static void mall_walk(struct tcf_proto *tp, struct tcf_walker *arg,
		      bool rtnl_held)
{
	struct cls_mall_head *head = rtnl_dereference(tp->root);

	if (arg->count < arg->skip)
		goto skip;

	if (!head)
		return;
	if (arg->fn(tp, head, arg) < 0)
		arg->stop = 1;
skip:
	arg->count++;
}

static int mall_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
			  void *cb_priv, struct netlink_ext_ack *extack)
{
	struct cls_mall_head *head = rtnl_dereference(tp->root);
	struct tc_cls_matchall_offload cls_mall = {};
	struct tcf_block *block = tp->chain->block;
	int err;

	if (tc_skip_hw(head->flags))
		return 0;

	cls_mall.rule =	flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	if (!cls_mall.rule)
		return -ENOMEM;

	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
	cls_mall.command = add ?
		TC_CLSMATCHALL_REPLACE : TC_CLSMATCHALL_DESTROY;
	cls_mall.cookie = (unsigned long)head;

	err = tc_setup_flow_action(&cls_mall.rule->action, &head->exts);
	if (err) {
		kfree(cls_mall.rule);
		if (add && tc_skip_sw(head->flags)) {
			NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
			return err;
		}
		return 0;
	}

	err = cb(TC_SETUP_CLSMATCHALL, &cls_mall, cb_priv);
	kfree(cls_mall.rule);

	if (err) {
		if (add && tc_skip_sw(head->flags))
			return err;
		return 0;
	}

	tc_cls_offload_cnt_update(block, &head->in_hw_count, &head->flags, add);

	return 0;
}

static void mall_stats_hw_filter(struct tcf_proto *tp,
				 struct cls_mall_head *head,
				 unsigned long cookie)
{
	struct tc_cls_matchall_offload cls_mall = {};
	struct tcf_block *block = tp->chain->block;

	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, NULL);
	cls_mall.command = TC_CLSMATCHALL_STATS;
	cls_mall.cookie = cookie;

	tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, false);

	tcf_exts_stats_update(&head->exts, cls_mall.stats.bytes,
			      cls_mall.stats.pkts, cls_mall.stats.lastused);
}

static int mall_dump(struct net *net, struct tcf_proto *tp, void *fh,
		     struct sk_buff *skb, struct tcmsg *t, bool rtnl_held)
{
	struct tc_matchall_pcnt gpf = {};
	struct cls_mall_head *head = fh;
	struct nlattr *nest;
	int cpu;

	if (!head)
		return skb->len;

	if (!tc_skip_hw(head->flags))
		mall_stats_hw_filter(tp, head, (unsigned long)head);

	t->tcm_handle = head->handle;

	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
	if (!nest)
		goto nla_put_failure;

	if (head->res.classid &&
	    nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid))
		goto nla_put_failure;

	if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags))
		goto nla_put_failure;

	for_each_possible_cpu(cpu) {
		struct tc_matchall_pcnt *pf = per_cpu_ptr(head->pf, cpu);

		gpf.rhit += pf->rhit;
	}

	if (nla_put_64bit(skb, TCA_MATCHALL_PCNT,
			  sizeof(struct tc_matchall_pcnt),
			  &gpf, TCA_MATCHALL_PAD))
		goto nla_put_failure;

	if (tcf_exts_dump(skb, &head->exts))
		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;
}

static void mall_bind_class(void *fh, u32 classid, unsigned long cl)
{
	struct cls_mall_head *head = fh;

	if (head && head->res.classid == classid)
		head->res.class = cl;
}

static struct tcf_proto_ops cls_mall_ops __read_mostly = {
	.kind		= "matchall",
	.classify	= mall_classify,
	.init		= mall_init,
	.destroy	= mall_destroy,
	.get		= mall_get,
	.change		= mall_change,
	.delete		= mall_delete,
	.walk		= mall_walk,
	.reoffload	= mall_reoffload,
	.dump		= mall_dump,
	.bind_class	= mall_bind_class,
	.owner		= THIS_MODULE,
};

static int __init cls_mall_init(void)
{
	return register_tcf_proto_ops(&cls_mall_ops);
}

static void __exit cls_mall_exit(void)
{
	unregister_tcf_proto_ops(&cls_mall_ops);
}

module_init(cls_mall_init);
module_exit(cls_mall_exit);

MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
MODULE_DESCRIPTION("Match-all classifier");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
bf3994d2 JP	2	/*
	3	* net/sched/cls_matchll.c Match-all classifier
	4	*
	5	* Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com>
bf3994d2 JP	6	*/
	7
	8	#include <linux/kernel.h>
	9	#include <linux/init.h>
	10	#include <linux/module.h>
f88c19aa	11	#include <linux/percpu.h>
bf3994d2 JP	12
	13	#include <net/sch_generic.h>
	14	#include <net/pkt_cls.h>
	15
fd62d9f5	16	struct cls_mall_head {
bf3994d2 JP	17	struct tcf_exts exts;
	18	struct tcf_result res;
	19	u32 handle;
b87f7936	20	u32 flags;
0efd1b3a	21	unsigned int in_hw_count;
f88c19aa	22	struct tc_matchall_pcnt __percpu *pf;
aaa908ff	23	struct rcu_work rwork;
bf3994d2 JP	24	};
	25
	26	static int mall_classify(struct sk_buff skb, const struct tcf_proto tp,
	27	struct tcf_result *res)
	28	{
	29	struct cls_mall_head *head = rcu_dereference_bh(tp->root);
bf3994d2	30
25426043 MC	31	if (unlikely(!head))
	32	return -1;
	33
fd62d9f5	34	if (tc_skip_sw(head->flags))
b87f7936 YG	35	return -1;
b87f7936 YG	36
3ff4cbec	37	*res = head->res;
f88c19aa	38	__this_cpu_inc(head->pf->rhit);
fd62d9f5	39	return tcf_exts_exec(skb, &head->exts, res);
bf3994d2 JP	40	}
	41
	42	static int mall_init(struct tcf_proto *tp)
	43	{
bf3994d2 JP	44	return 0;
	45	}
	46
57767e78 CW	47	static void __mall_destroy(struct cls_mall_head *head)
	48	{
	49	tcf_exts_destroy(&head->exts);
	50	tcf_exts_put_net(&head->exts);
f88c19aa	51	free_percpu(head->pf);
57767e78 CW	52	kfree(head);
	53	}
	54
df2735ee CW	55	static void mall_destroy_work(struct work_struct *work)
df2735ee CW	56	{
aaa908ff CW	57	struct cls_mall_head *head = container_of(to_rcu_work(work),
	58	struct cls_mall_head,
	59	rwork);
df2735ee	60	rtnl_lock();
57767e78	61	__mall_destroy(head);
df2735ee CW	62	rtnl_unlock();
	63	}
	64
2447a96f JP	65	static void mall_destroy_hw_filter(struct tcf_proto *tp,
2447a96f JP	66	struct cls_mall_head *head,
b505b29f JK	67	unsigned long cookie,
b505b29f JK	68	struct netlink_ext_ack *extack)
b87f7936	69	{
de4784ca	70	struct tc_cls_matchall_offload cls_mall = {};
2447a96f	71	struct tcf_block *block = tp->chain->block;
b87f7936	72
d6787147	73	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
2447a96f	74	cls_mall.command = TC_CLSMATCHALL_DESTROY;
de4784ca	75	cls_mall.cookie = cookie;
b87f7936	76
aeb3fecd	77	tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, false);
caa72601	78	tcf_block_offload_dec(block, &head->flags);
b87f7936 YG	79	}
b87f7936 YG	80
2447a96f JP	81	static int mall_replace_hw_filter(struct tcf_proto *tp,
2447a96f JP	82	struct cls_mall_head *head,
02798140 QM	83	unsigned long cookie,
02798140 QM	84	struct netlink_ext_ack *extack)
b87f7936	85	{
de4784ca	86	struct tc_cls_matchall_offload cls_mall = {};
2447a96f JP	87	struct tcf_block *block = tp->chain->block;
	88	bool skip_sw = tc_skip_sw(head->flags);
	89	int err;
b87f7936	90
f00cbf19 PJV	91	cls_mall.rule = flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	92	if (!cls_mall.rule)
	93	return -ENOMEM;
	94
d6787147	95	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
2447a96f	96	cls_mall.command = TC_CLSMATCHALL_REPLACE;
de4784ca	97	cls_mall.cookie = cookie;
b87f7936	98
f00cbf19 PJV	99	err = tc_setup_flow_action(&cls_mall.rule->action, &head->exts);
	100	if (err) {
	101	kfree(cls_mall.rule);
	102	mall_destroy_hw_filter(tp, head, cookie, NULL);
	103	if (skip_sw)
	104	NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
	105	else
	106	err = 0;
	107
	108	return err;
	109	}
	110
aeb3fecd	111	err = tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, skip_sw);
f00cbf19 PJV	112	kfree(cls_mall.rule);
f00cbf19 PJV	113
2447a96f	114	if (err < 0) {
b505b29f	115	mall_destroy_hw_filter(tp, head, cookie, NULL);
2447a96f JP	116	return err;
2447a96f JP	117	} else if (err > 0) {
0efd1b3a	118	head->in_hw_count = err;
caa72601	119	tcf_block_offload_inc(block, &head->flags);
2447a96f JP	120	}
	121
	122	if (skip_sw && !(head->flags & TCA_CLS_FLAGS_IN_HW))
	123	return -EINVAL;
	124
	125	return 0;
b87f7936 YG	126	}
b87f7936 YG	127
12db03b6 VB	128	static void mall_destroy(struct tcf_proto *tp, bool rtnl_held,
12db03b6 VB	129	struct netlink_ext_ack *extack)
bf3994d2 JP	130	{
	131	struct cls_mall_head *head = rtnl_dereference(tp->root);
	132
fd62d9f5	133	if (!head)
763dbf63	134	return;
bf3994d2	135
a51c76b4 HL	136	tcf_unbind_filter(tp, &head->res);
a51c76b4 HL	137
2447a96f	138	if (!tc_skip_hw(head->flags))
b505b29f	139	mall_destroy_hw_filter(tp, head, (unsigned long) head, extack);
b87f7936	140
57767e78	141	if (tcf_exts_get_net(&head->exts))
aaa908ff	142	tcf_queue_work(&head->rwork, mall_destroy_work);
57767e78 CW	143	else
57767e78 CW	144	__mall_destroy(head);
bf3994d2 JP	145	}
bf3994d2 JP	146
8113c095	147	static void mall_get(struct tcf_proto tp, u32 handle)
bf3994d2	148	{
0db6f8be ND	149	struct cls_mall_head *head = rtnl_dereference(tp->root);
	150
	151	if (head && head->handle == handle)
	152	return head;
	153
8113c095	154	return NULL;
bf3994d2 JP	155	}
	156
	157	static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
	158	[TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC },
	159	[TCA_MATCHALL_CLASSID] = { .type = NLA_U32 },
	160	};
	161
	162	static int mall_set_parms(struct net net, struct tcf_proto tp,
fd62d9f5	163	struct cls_mall_head *head,
bf3994d2	164	unsigned long base, struct nlattr **tb,
50a56190 AA	165	struct nlattr *est, bool ovr,
50a56190 AA	166	struct netlink_ext_ack *extack)
bf3994d2	167	{
bf3994d2 JP	168	int err;
bf3994d2 JP	169
ec6743a1 VB	170	err = tcf_exts_validate(net, tp, tb, est, &head->exts, ovr, true,
ec6743a1 VB	171	extack);
bf3994d2	172	if (err < 0)
a74cb369	173	return err;
bf3994d2 JP	174
bf3994d2 JP	175	if (tb[TCA_MATCHALL_CLASSID]) {
fd62d9f5 YG	176	head->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]);
fd62d9f5 YG	177	tcf_bind_filter(tp, &head->res, base);
bf3994d2	178	}
bf3994d2 JP	179	return 0;
	180	}
	181
	182	static int mall_change(struct net net, struct sk_buff in_skb,
	183	struct tcf_proto *tp, unsigned long base,
	184	u32 handle, struct nlattr **tca,
12db03b6 VB	185	void **arg, bool ovr, bool rtnl_held,
12db03b6 VB	186	struct netlink_ext_ack *extack)
bf3994d2 JP	187	{
bf3994d2 JP	188	struct cls_mall_head *head = rtnl_dereference(tp->root);
bf3994d2	189	struct nlattr *tb[TCA_MATCHALL_MAX + 1];
fd62d9f5	190	struct cls_mall_head *new;
b87f7936	191	u32 flags = 0;
bf3994d2 JP	192	int err;
	193
	194	if (!tca[TCA_OPTIONS])
	195	return -EINVAL;
	196
fd62d9f5 YG	197	if (head)
fd62d9f5 YG	198	return -EEXIST;
bf3994d2	199
8cb08174 JB	200	err = nla_parse_nested_deprecated(tb, TCA_MATCHALL_MAX,
8cb08174 JB	201	tca[TCA_OPTIONS], mall_policy, NULL);
bf3994d2 JP	202	if (err < 0)
	203	return err;
	204
b87f7936 YG	205	if (tb[TCA_MATCHALL_FLAGS]) {
	206	flags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]);
	207	if (!tc_flags_valid(flags))
	208	return -EINVAL;
	209	}
	210
fd62d9f5 YG	211	new = kzalloc(sizeof(*new), GFP_KERNEL);
fd62d9f5 YG	212	if (!new)
bf3994d2 JP	213	return -ENOBUFS;
bf3994d2 JP	214
14215108	215	err = tcf_exts_init(&new->exts, net, TCA_MATCHALL_ACT, 0);
ec2507d2 YG	216	if (err)
ec2507d2 YG	217	goto err_exts_init;
bf3994d2 JP	218
	219	if (!handle)
	220	handle = 1;
fd62d9f5 YG	221	new->handle = handle;
fd62d9f5 YG	222	new->flags = flags;
f88c19aa CW	223	new->pf = alloc_percpu(struct tc_matchall_pcnt);
	224	if (!new->pf) {
	225	err = -ENOMEM;
	226	goto err_alloc_percpu;
	227	}
bf3994d2	228
50a56190 AA	229	err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE], ovr,
50a56190 AA	230	extack);
bf3994d2	231	if (err)
ec2507d2	232	goto err_set_parms;
bf3994d2	233
2447a96f	234	if (!tc_skip_hw(new->flags)) {
02798140 QM	235	err = mall_replace_hw_filter(tp, new, (unsigned long)new,
02798140 QM	236	extack);
2447a96f JP	237	if (err)
2447a96f JP	238	goto err_replace_hw_filter;
b87f7936	239	}
c7d2b2f5 OG	240
	241	if (!tc_in_hw(new->flags))
	242	new->flags \|= TCA_CLS_FLAGS_NOT_IN_HW;
b87f7936	243
8113c095	244	*arg = head;
fd62d9f5	245	rcu_assign_pointer(tp->root, new);
bf3994d2 JP	246	return 0;
bf3994d2 JP	247
ec2507d2 YG	248	err_replace_hw_filter:
ec2507d2 YG	249	err_set_parms:
f88c19aa CW	250	free_percpu(new->pf);
f88c19aa CW	251	err_alloc_percpu:
e2160156	252	tcf_exts_destroy(&new->exts);
ec2507d2	253	err_exts_init:
fd62d9f5	254	kfree(new);
bf3994d2 JP	255	return err;
	256	}
	257
571acf21	258	static int mall_delete(struct tcf_proto tp, void arg, bool *last,
12db03b6	259	bool rtnl_held, struct netlink_ext_ack *extack)
bf3994d2	260	{
fd62d9f5	261	return -EOPNOTSUPP;
bf3994d2 JP	262	}
bf3994d2 JP	263
12db03b6 VB	264	static void mall_walk(struct tcf_proto tp, struct tcf_walker arg,
12db03b6 VB	265	bool rtnl_held)
bf3994d2 JP	266	{
bf3994d2 JP	267	struct cls_mall_head *head = rtnl_dereference(tp->root);
bf3994d2 JP	268
	269	if (arg->count < arg->skip)
	270	goto skip;
d66022cd VB	271
	272	if (!head)
	273	return;
8113c095	274	if (arg->fn(tp, head, arg) < 0)
bf3994d2 JP	275	arg->stop = 1;
	276	skip:
	277	arg->count++;
	278	}
	279
0efd1b3a JH	280	static int mall_reoffload(struct tcf_proto tp, bool add, tc_setup_cb_t cb,
	281	void cb_priv, struct netlink_ext_ack extack)
	282	{
	283	struct cls_mall_head *head = rtnl_dereference(tp->root);
	284	struct tc_cls_matchall_offload cls_mall = {};
	285	struct tcf_block *block = tp->chain->block;
	286	int err;
	287
	288	if (tc_skip_hw(head->flags))
	289	return 0;
	290
f00cbf19 PJV	291	cls_mall.rule = flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	292	if (!cls_mall.rule)
	293	return -ENOMEM;
	294
d6787147	295	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
0efd1b3a JH	296	cls_mall.command = add ?
0efd1b3a JH	297	TC_CLSMATCHALL_REPLACE : TC_CLSMATCHALL_DESTROY;
0efd1b3a JH	298	cls_mall.cookie = (unsigned long)head;
0efd1b3a JH	299
f00cbf19 PJV	300	err = tc_setup_flow_action(&cls_mall.rule->action, &head->exts);
	301	if (err) {
	302	kfree(cls_mall.rule);
	303	if (add && tc_skip_sw(head->flags)) {
	304	NL_SET_ERR_MSG_MOD(extack, "Failed to setup flow action");
	305	return err;
	306	}
5f058368	307	return 0;
f00cbf19 PJV	308	}
f00cbf19 PJV	309
0efd1b3a	310	err = cb(TC_SETUP_CLSMATCHALL, &cls_mall, cb_priv);
f00cbf19 PJV	311	kfree(cls_mall.rule);
f00cbf19 PJV	312
0efd1b3a JH	313	if (err) {
	314	if (add && tc_skip_sw(head->flags))
	315	return err;
	316	return 0;
	317	}
	318
	319	tc_cls_offload_cnt_update(block, &head->in_hw_count, &head->flags, add);
	320
	321	return 0;
	322	}
	323
b7fe4ab8 PJV	324	static void mall_stats_hw_filter(struct tcf_proto *tp,
	325	struct cls_mall_head *head,
	326	unsigned long cookie)
	327	{
	328	struct tc_cls_matchall_offload cls_mall = {};
	329	struct tcf_block *block = tp->chain->block;
	330
d6787147	331	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, NULL);
b7fe4ab8 PJV	332	cls_mall.command = TC_CLSMATCHALL_STATS;
	333	cls_mall.cookie = cookie;
	334
	335	tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, false);
	336
	337	tcf_exts_stats_update(&head->exts, cls_mall.stats.bytes,
	338	cls_mall.stats.pkts, cls_mall.stats.lastused);
	339	}
	340
8113c095	341	static int mall_dump(struct net net, struct tcf_proto tp, void *fh,
12db03b6	342	struct sk_buff skb, struct tcmsg t, bool rtnl_held)
bf3994d2	343	{
f88c19aa	344	struct tc_matchall_pcnt gpf = {};
8113c095	345	struct cls_mall_head *head = fh;
bf3994d2	346	struct nlattr *nest;
f88c19aa	347	int cpu;
bf3994d2	348
fd62d9f5	349	if (!head)
bf3994d2 JP	350	return skb->len;
bf3994d2 JP	351
b7fe4ab8 PJV	352	if (!tc_skip_hw(head->flags))
	353	mall_stats_hw_filter(tp, head, (unsigned long)head);
	354
fd62d9f5	355	t->tcm_handle = head->handle;
bf3994d2	356
ae0be8de	357	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
bf3994d2 JP	358	if (!nest)
	359	goto nla_put_failure;
	360
fd62d9f5 YG	361	if (head->res.classid &&
fd62d9f5 YG	362	nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid))
bf3994d2 JP	363	goto nla_put_failure;
bf3994d2 JP	364
7a335ada OG	365	if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags))
	366	goto nla_put_failure;
	367
f88c19aa CW	368	for_each_possible_cpu(cpu) {
	369	struct tc_matchall_pcnt *pf = per_cpu_ptr(head->pf, cpu);
	370
	371	gpf.rhit += pf->rhit;
	372	}
	373
	374	if (nla_put_64bit(skb, TCA_MATCHALL_PCNT,
	375	sizeof(struct tc_matchall_pcnt),
	376	&gpf, TCA_MATCHALL_PAD))
	377	goto nla_put_failure;
	378
fd62d9f5	379	if (tcf_exts_dump(skb, &head->exts))
bf3994d2 JP	380	goto nla_put_failure;
	381
	382	nla_nest_end(skb, nest);
	383
fd62d9f5	384	if (tcf_exts_dump_stats(skb, &head->exts) < 0)
bf3994d2 JP	385	goto nla_put_failure;
	386
	387	return skb->len;
	388
	389	nla_put_failure:
	390	nla_nest_cancel(skb, nest);
	391	return -1;
	392	}
	393
07d79fc7 CW	394	static void mall_bind_class(void *fh, u32 classid, unsigned long cl)
	395	{
	396	struct cls_mall_head *head = fh;
	397
	398	if (head && head->res.classid == classid)
	399	head->res.class = cl;
	400	}
	401
bf3994d2 JP	402	static struct tcf_proto_ops cls_mall_ops __read_mostly = {
	403	.kind = "matchall",
	404	.classify = mall_classify,
	405	.init = mall_init,
	406	.destroy = mall_destroy,
	407	.get = mall_get,
	408	.change = mall_change,
	409	.delete = mall_delete,
	410	.walk = mall_walk,
0efd1b3a	411	.reoffload = mall_reoffload,
bf3994d2	412	.dump = mall_dump,
07d79fc7	413	.bind_class = mall_bind_class,
bf3994d2 JP	414	.owner = THIS_MODULE,
	415	};
	416
	417	static int __init cls_mall_init(void)
	418	{
	419	return register_tcf_proto_ops(&cls_mall_ops);
	420	}
	421
	422	static void __exit cls_mall_exit(void)
	423	{
	424	unregister_tcf_proto_ops(&cls_mall_ops);
	425	}
	426
	427	module_init(cls_mall_init);
	428	module_exit(cls_mall_exit);
	429
	430	MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
	431	MODULE_DESCRIPTION("Match-all classifier");
	432	MODULE_LICENSE("GPL v2");