[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>
#include <net/tc_wrapper.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;
	bool deleting;
};

TC_INDIRECT_SCOPE 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_destroy(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall, false,
			    &head->flags, &head->in_hw_count, true);
}

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_offload_action(&cls_mall.rule->action, &head->exts,
				      cls_mall.common.extack);
	if (err) {
		kfree(cls_mall.rule);
		mall_destroy_hw_filter(tp, head, cookie, NULL);

		return skip_sw ? err : 0;
	}

	err = tc_setup_cb_add(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall,
			      skip_sw, &head->flags, &head->in_hw_count, true);
	tc_cleanup_offload_action(&cls_mall.rule->action);
	kfree(cls_mall.rule);

	if (err) {
		mall_destroy_hw_filter(tp, head, cookie, NULL);
		return err;
	}

	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 },
	[TCA_MATCHALL_FLAGS]		= { .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, u32 flags, u32 fl_flags,
			  struct netlink_ext_ack *extack)
{
	int err;

	err = tcf_exts_validate_ex(net, tp, tb, est, &head->exts, flags,
				   fl_flags, 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, u32 flags,
		       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 userflags = 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]) {
		userflags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]);
		if (!tc_flags_valid(userflags))
			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 = userflags;
	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],
			     flags, new->flags, 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)
{
	struct cls_mall_head *head = rtnl_dereference(tp->root);

	head->deleting = true;
	*last = true;
	return 0;
}

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

static int mall_reoffload(struct tcf_proto *tp, bool add, flow_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_offload_action(&cls_mall.rule->action, &head->exts,
				      cls_mall.common.extack);
	if (err) {
		kfree(cls_mall.rule);

		return add && tc_skip_sw(head->flags) ? err : 0;
	}

	err = tc_setup_cb_reoffload(block, tp, add, cb, TC_SETUP_CLSMATCHALL,
				    &cls_mall, cb_priv, &head->flags,
				    &head->in_hw_count);
	tc_cleanup_offload_action(&cls_mall.rule->action);
	kfree(cls_mall.rule);

	return err;
}

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, true);

	tcf_exts_hw_stats_update(&head->exts, &cls_mall.stats);
}

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, void *q,
			    unsigned long base)
{
	struct cls_mall_head *head = fh;

	tc_cls_bind_class(classid, cl, q, &head->res, base);
}

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>
9f3101dc	15	#include <net/tc_wrapper.h>
bf3994d2	16
fd62d9f5	17	struct cls_mall_head {
bf3994d2 JP	18	struct tcf_exts exts;
	19	struct tcf_result res;
	20	u32 handle;
b87f7936	21	u32 flags;
0efd1b3a	22	unsigned int in_hw_count;
f88c19aa	23	struct tc_matchall_pcnt __percpu *pf;
aaa908ff	24	struct rcu_work rwork;
f517f271	25	bool deleting;
bf3994d2 JP	26	};
bf3994d2 JP	27
9f3101dc PT	28	TC_INDIRECT_SCOPE int mall_classify(struct sk_buff *skb,
	29	const struct tcf_proto *tp,
	30	struct tcf_result *res)
bf3994d2 JP	31	{
bf3994d2 JP	32	struct cls_mall_head *head = rcu_dereference_bh(tp->root);
bf3994d2	33
25426043 MC	34	if (unlikely(!head))
	35	return -1;
	36
fd62d9f5	37	if (tc_skip_sw(head->flags))
b87f7936 YG	38	return -1;
b87f7936 YG	39
3ff4cbec	40	*res = head->res;
f88c19aa	41	__this_cpu_inc(head->pf->rhit);
fd62d9f5	42	return tcf_exts_exec(skb, &head->exts, res);
bf3994d2 JP	43	}
	44
	45	static int mall_init(struct tcf_proto *tp)
	46	{
bf3994d2 JP	47	return 0;
	48	}
	49
57767e78 CW	50	static void __mall_destroy(struct cls_mall_head *head)
	51	{
	52	tcf_exts_destroy(&head->exts);
	53	tcf_exts_put_net(&head->exts);
f88c19aa	54	free_percpu(head->pf);
57767e78 CW	55	kfree(head);
	56	}
	57
df2735ee CW	58	static void mall_destroy_work(struct work_struct *work)
df2735ee CW	59	{
aaa908ff CW	60	struct cls_mall_head *head = container_of(to_rcu_work(work),
	61	struct cls_mall_head,
	62	rwork);
df2735ee	63	rtnl_lock();
57767e78	64	__mall_destroy(head);
df2735ee CW	65	rtnl_unlock();
	66	}
	67
2447a96f JP	68	static void mall_destroy_hw_filter(struct tcf_proto *tp,
2447a96f JP	69	struct cls_mall_head *head,
b505b29f JK	70	unsigned long cookie,
b505b29f JK	71	struct netlink_ext_ack *extack)
b87f7936	72	{
de4784ca	73	struct tc_cls_matchall_offload cls_mall = {};
2447a96f	74	struct tcf_block *block = tp->chain->block;
b87f7936	75
d6787147	76	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
2447a96f	77	cls_mall.command = TC_CLSMATCHALL_DESTROY;
de4784ca	78	cls_mall.cookie = cookie;
b87f7936	79
40119211 VB	80	tc_setup_cb_destroy(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall, false,
40119211 VB	81	&head->flags, &head->in_hw_count, true);
b87f7936 YG	82	}
b87f7936 YG	83
2447a96f JP	84	static int mall_replace_hw_filter(struct tcf_proto *tp,
2447a96f JP	85	struct cls_mall_head *head,
02798140 QM	86	unsigned long cookie,
02798140 QM	87	struct netlink_ext_ack *extack)
b87f7936	88	{
de4784ca	89	struct tc_cls_matchall_offload cls_mall = {};
2447a96f JP	90	struct tcf_block *block = tp->chain->block;
	91	bool skip_sw = tc_skip_sw(head->flags);
	92	int err;
b87f7936	93
f00cbf19 PJV	94	cls_mall.rule = flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	95	if (!cls_mall.rule)
	96	return -ENOMEM;
	97
d6787147	98	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
2447a96f	99	cls_mall.command = TC_CLSMATCHALL_REPLACE;
de4784ca	100	cls_mall.cookie = cookie;
b87f7936	101
c2ccf84e IS	102	err = tc_setup_offload_action(&cls_mall.rule->action, &head->exts,
c2ccf84e IS	103	cls_mall.common.extack);
f00cbf19 PJV	104	if (err) {
	105	kfree(cls_mall.rule);
	106	mall_destroy_hw_filter(tp, head, cookie, NULL);
f00cbf19	107
4c096ea2	108	return skip_sw ? err : 0;
f00cbf19 PJV	109	}
f00cbf19 PJV	110
40119211 VB	111	err = tc_setup_cb_add(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall,
40119211 VB	112	skip_sw, &head->flags, &head->in_hw_count, true);
9c1c0e12	113	tc_cleanup_offload_action(&cls_mall.rule->action);
f00cbf19 PJV	114	kfree(cls_mall.rule);
f00cbf19 PJV	115
40119211	116	if (err) {
b505b29f	117	mall_destroy_hw_filter(tp, head, cookie, NULL);
2447a96f	118	return err;
2447a96f JP	119	}
	120
	121	if (skip_sw && !(head->flags & TCA_CLS_FLAGS_IN_HW))
	122	return -EINVAL;
	123
	124	return 0;
b87f7936 YG	125	}
b87f7936 YG	126
12db03b6 VB	127	static void mall_destroy(struct tcf_proto *tp, bool rtnl_held,
12db03b6 VB	128	struct netlink_ext_ack *extack)
bf3994d2 JP	129	{
	130	struct cls_mall_head *head = rtnl_dereference(tp->root);
	131
fd62d9f5	132	if (!head)
763dbf63	133	return;
bf3994d2	134
a51c76b4 HL	135	tcf_unbind_filter(tp, &head->res);
a51c76b4 HL	136
2447a96f	137	if (!tc_skip_hw(head->flags))
b505b29f	138	mall_destroy_hw_filter(tp, head, (unsigned long) head, extack);
b87f7936	139
57767e78	140	if (tcf_exts_get_net(&head->exts))
aaa908ff	141	tcf_queue_work(&head->rwork, mall_destroy_work);
57767e78 CW	142	else
57767e78 CW	143	__mall_destroy(head);
bf3994d2 JP	144	}
bf3994d2 JP	145
8113c095	146	static void mall_get(struct tcf_proto tp, u32 handle)
bf3994d2	147	{
0db6f8be ND	148	struct cls_mall_head *head = rtnl_dereference(tp->root);
	149
	150	if (head && head->handle == handle)
	151	return head;
	152
8113c095	153	return NULL;
bf3994d2 JP	154	}
	155
	156	static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
	157	[TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC },
	158	[TCA_MATCHALL_CLASSID] = { .type = NLA_U32 },
1afa3cc9	159	[TCA_MATCHALL_FLAGS] = { .type = NLA_U32 },
bf3994d2 JP	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,
c86e0209	165	struct nlattr *est, u32 flags, u32 fl_flags,
50a56190	166	struct netlink_ext_ack *extack)
bf3994d2	167	{
bf3994d2 JP	168	int err;
bf3994d2 JP	169
c86e0209 BZ	170	err = tcf_exts_validate_ex(net, tp, tb, est, &head->exts, flags,
c86e0209 BZ	171	fl_flags, 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,
695176bf	185	void **arg, u32 flags,
12db03b6	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;
695176bf	191	u32 userflags = 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	205	if (tb[TCA_MATCHALL_FLAGS]) {
695176bf CW	206	userflags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]);
695176bf CW	207	if (!tc_flags_valid(userflags))
b87f7936 YG	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	221	new->handle = handle;
695176bf	222	new->flags = userflags;
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
c86e0209 BZ	229	err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE],
c86e0209 BZ	230	flags, new->flags, 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	{
f517f271 JP	261	struct cls_mall_head *head = rtnl_dereference(tp->root);
	262
	263	head->deleting = true;
	264	*last = true;
	265	return 0;
bf3994d2 JP	266	}
bf3994d2 JP	267
12db03b6 VB	268	static void mall_walk(struct tcf_proto tp, struct tcf_walker arg,
12db03b6 VB	269	bool rtnl_held)
bf3994d2 JP	270	{
bf3994d2 JP	271	struct cls_mall_head *head = rtnl_dereference(tp->root);
bf3994d2 JP	272
	273	if (arg->count < arg->skip)
	274	goto skip;
d66022cd	275
f517f271	276	if (!head \|\| head->deleting)
d66022cd	277	return;
8113c095	278	if (arg->fn(tp, head, arg) < 0)
bf3994d2 JP	279	arg->stop = 1;
	280	skip:
	281	arg->count++;
	282	}
	283
a7323311	284	static int mall_reoffload(struct tcf_proto tp, bool add, flow_setup_cb_t cb,
0efd1b3a JH	285	void cb_priv, struct netlink_ext_ack extack)
	286	{
	287	struct cls_mall_head *head = rtnl_dereference(tp->root);
	288	struct tc_cls_matchall_offload cls_mall = {};
	289	struct tcf_block *block = tp->chain->block;
	290	int err;
	291
	292	if (tc_skip_hw(head->flags))
	293	return 0;
	294
f00cbf19 PJV	295	cls_mall.rule = flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	296	if (!cls_mall.rule)
	297	return -ENOMEM;
	298
d6787147	299	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
0efd1b3a JH	300	cls_mall.command = add ?
0efd1b3a JH	301	TC_CLSMATCHALL_REPLACE : TC_CLSMATCHALL_DESTROY;
0efd1b3a JH	302	cls_mall.cookie = (unsigned long)head;
0efd1b3a JH	303
c2ccf84e IS	304	err = tc_setup_offload_action(&cls_mall.rule->action, &head->exts,
c2ccf84e IS	305	cls_mall.common.extack);
f00cbf19 PJV	306	if (err) {
f00cbf19 PJV	307	kfree(cls_mall.rule);
4c096ea2 IS	308
4c096ea2 IS	309	return add && tc_skip_sw(head->flags) ? err : 0;
f00cbf19 PJV	310	}
f00cbf19 PJV	311
40119211 VB	312	err = tc_setup_cb_reoffload(block, tp, add, cb, TC_SETUP_CLSMATCHALL,
	313	&cls_mall, cb_priv, &head->flags,
	314	&head->in_hw_count);
9c1c0e12	315	tc_cleanup_offload_action(&cls_mall.rule->action);
f00cbf19 PJV	316	kfree(cls_mall.rule);
f00cbf19 PJV	317
2801f30e	318	return err;
0efd1b3a JH	319	}
0efd1b3a JH	320
b7fe4ab8 PJV	321	static void mall_stats_hw_filter(struct tcf_proto *tp,
	322	struct cls_mall_head *head,
	323	unsigned long cookie)
	324	{
	325	struct tc_cls_matchall_offload cls_mall = {};
	326	struct tcf_block *block = tp->chain->block;
	327
d6787147	328	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, NULL);
b7fe4ab8 PJV	329	cls_mall.command = TC_CLSMATCHALL_STATS;
	330	cls_mall.cookie = cookie;
	331
40119211	332	tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, false, true);
b7fe4ab8	333
ac7d2790	334	tcf_exts_hw_stats_update(&head->exts, &cls_mall.stats);
b7fe4ab8 PJV	335	}
b7fe4ab8 PJV	336
8113c095	337	static int mall_dump(struct net net, struct tcf_proto tp, void *fh,
12db03b6	338	struct sk_buff skb, struct tcmsg t, bool rtnl_held)
bf3994d2	339	{
f88c19aa	340	struct tc_matchall_pcnt gpf = {};
8113c095	341	struct cls_mall_head *head = fh;
bf3994d2	342	struct nlattr *nest;
f88c19aa	343	int cpu;
bf3994d2	344
fd62d9f5	345	if (!head)
bf3994d2 JP	346	return skb->len;
bf3994d2 JP	347
b7fe4ab8 PJV	348	if (!tc_skip_hw(head->flags))
	349	mall_stats_hw_filter(tp, head, (unsigned long)head);
	350
fd62d9f5	351	t->tcm_handle = head->handle;
bf3994d2	352
ae0be8de	353	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
bf3994d2 JP	354	if (!nest)
	355	goto nla_put_failure;
	356
fd62d9f5 YG	357	if (head->res.classid &&
fd62d9f5 YG	358	nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid))
bf3994d2 JP	359	goto nla_put_failure;
bf3994d2 JP	360
7a335ada OG	361	if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags))
	362	goto nla_put_failure;
	363
f88c19aa CW	364	for_each_possible_cpu(cpu) {
	365	struct tc_matchall_pcnt *pf = per_cpu_ptr(head->pf, cpu);
	366
	367	gpf.rhit += pf->rhit;
	368	}
	369
	370	if (nla_put_64bit(skb, TCA_MATCHALL_PCNT,
	371	sizeof(struct tc_matchall_pcnt),
	372	&gpf, TCA_MATCHALL_PAD))
	373	goto nla_put_failure;
	374
fd62d9f5	375	if (tcf_exts_dump(skb, &head->exts))
bf3994d2 JP	376	goto nla_put_failure;
	377
	378	nla_nest_end(skb, nest);
	379
fd62d9f5	380	if (tcf_exts_dump_stats(skb, &head->exts) < 0)
bf3994d2 JP	381	goto nla_put_failure;
	382
	383	return skb->len;
	384
	385	nla_put_failure:
	386	nla_nest_cancel(skb, nest);
	387	return -1;
	388	}
	389
2e24cd75 CW	390	static void mall_bind_class(void fh, u32 classid, unsigned long cl, void q,
2e24cd75 CW	391	unsigned long base)
07d79fc7 CW	392	{
	393	struct cls_mall_head *head = fh;
	394
cc9039a1	395	tc_cls_bind_class(classid, cl, q, &head->res, base);
07d79fc7 CW	396	}
07d79fc7 CW	397
bf3994d2 JP	398	static struct tcf_proto_ops cls_mall_ops __read_mostly = {
	399	.kind = "matchall",
	400	.classify = mall_classify,
	401	.init = mall_init,
	402	.destroy = mall_destroy,
	403	.get = mall_get,
	404	.change = mall_change,
	405	.delete = mall_delete,
	406	.walk = mall_walk,
0efd1b3a	407	.reoffload = mall_reoffload,
bf3994d2	408	.dump = mall_dump,
07d79fc7	409	.bind_class = mall_bind_class,
bf3994d2 JP	410	.owner = THIS_MODULE,
	411	};
	412
	413	static int __init cls_mall_init(void)
	414	{
	415	return register_tcf_proto_ops(&cls_mall_ops);
	416	}
	417
	418	static void __exit cls_mall_exit(void)
	419	{
	420	unregister_tcf_proto_ops(&cls_mall_ops);
	421	}
	422
	423	module_init(cls_mall_init);
	424	module_exit(cls_mall_exit);
	425
	426	MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
	427	MODULE_DESCRIPTION("Match-all classifier");
	428	MODULE_LICENSE("GPL v2");