[linux-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;
	bool deleting;
};

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_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.bytes,
				 cls_mall.stats.pkts, cls_mall.stats.drops,
				 cls_mall.stats.lastused,
				 cls_mall.stats.used_hw_stats,
				 cls_mall.stats.used_hw_stats_valid);
}

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>
	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;
f517f271	24	bool deleting;
bf3994d2 JP	25	};
	26
	27	static int mall_classify(struct sk_buff skb, const struct tcf_proto tp,
	28	struct tcf_result *res)
	29	{
	30	struct cls_mall_head *head = rcu_dereference_bh(tp->root);
bf3994d2	31
25426043 MC	32	if (unlikely(!head))
	33	return -1;
	34
fd62d9f5	35	if (tc_skip_sw(head->flags))
b87f7936 YG	36	return -1;
b87f7936 YG	37
3ff4cbec	38	*res = head->res;
f88c19aa	39	__this_cpu_inc(head->pf->rhit);
fd62d9f5	40	return tcf_exts_exec(skb, &head->exts, res);
bf3994d2 JP	41	}
	42
	43	static int mall_init(struct tcf_proto *tp)
	44	{
bf3994d2 JP	45	return 0;
	46	}
	47
57767e78 CW	48	static void __mall_destroy(struct cls_mall_head *head)
	49	{
	50	tcf_exts_destroy(&head->exts);
	51	tcf_exts_put_net(&head->exts);
f88c19aa	52	free_percpu(head->pf);
57767e78 CW	53	kfree(head);
	54	}
	55
df2735ee CW	56	static void mall_destroy_work(struct work_struct *work)
df2735ee CW	57	{
aaa908ff CW	58	struct cls_mall_head *head = container_of(to_rcu_work(work),
	59	struct cls_mall_head,
	60	rwork);
df2735ee	61	rtnl_lock();
57767e78	62	__mall_destroy(head);
df2735ee CW	63	rtnl_unlock();
	64	}
	65
2447a96f JP	66	static void mall_destroy_hw_filter(struct tcf_proto *tp,
2447a96f JP	67	struct cls_mall_head *head,
b505b29f JK	68	unsigned long cookie,
b505b29f JK	69	struct netlink_ext_ack *extack)
b87f7936	70	{
de4784ca	71	struct tc_cls_matchall_offload cls_mall = {};
2447a96f	72	struct tcf_block *block = tp->chain->block;
b87f7936	73
d6787147	74	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
2447a96f	75	cls_mall.command = TC_CLSMATCHALL_DESTROY;
de4784ca	76	cls_mall.cookie = cookie;
b87f7936	77
40119211 VB	78	tc_setup_cb_destroy(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall, false,
40119211 VB	79	&head->flags, &head->in_hw_count, true);
b87f7936 YG	80	}
b87f7936 YG	81
2447a96f JP	82	static int mall_replace_hw_filter(struct tcf_proto *tp,
2447a96f JP	83	struct cls_mall_head *head,
02798140 QM	84	unsigned long cookie,
02798140 QM	85	struct netlink_ext_ack *extack)
b87f7936	86	{
de4784ca	87	struct tc_cls_matchall_offload cls_mall = {};
2447a96f JP	88	struct tcf_block *block = tp->chain->block;
	89	bool skip_sw = tc_skip_sw(head->flags);
	90	int err;
b87f7936	91
f00cbf19 PJV	92	cls_mall.rule = flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	93	if (!cls_mall.rule)
	94	return -ENOMEM;
	95
d6787147	96	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
2447a96f	97	cls_mall.command = TC_CLSMATCHALL_REPLACE;
de4784ca	98	cls_mall.cookie = cookie;
b87f7936	99
c2ccf84e IS	100	err = tc_setup_offload_action(&cls_mall.rule->action, &head->exts,
c2ccf84e IS	101	cls_mall.common.extack);
f00cbf19 PJV	102	if (err) {
	103	kfree(cls_mall.rule);
	104	mall_destroy_hw_filter(tp, head, cookie, NULL);
f00cbf19	105
4c096ea2	106	return skip_sw ? err : 0;
f00cbf19 PJV	107	}
f00cbf19 PJV	108
40119211 VB	109	err = tc_setup_cb_add(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall,
40119211 VB	110	skip_sw, &head->flags, &head->in_hw_count, true);
9c1c0e12	111	tc_cleanup_offload_action(&cls_mall.rule->action);
f00cbf19 PJV	112	kfree(cls_mall.rule);
f00cbf19 PJV	113
40119211	114	if (err) {
b505b29f	115	mall_destroy_hw_filter(tp, head, cookie, NULL);
2447a96f	116	return err;
2447a96f JP	117	}
	118
	119	if (skip_sw && !(head->flags & TCA_CLS_FLAGS_IN_HW))
	120	return -EINVAL;
	121
	122	return 0;
b87f7936 YG	123	}
b87f7936 YG	124
12db03b6 VB	125	static void mall_destroy(struct tcf_proto *tp, bool rtnl_held,
12db03b6 VB	126	struct netlink_ext_ack *extack)
bf3994d2 JP	127	{
	128	struct cls_mall_head *head = rtnl_dereference(tp->root);
	129
fd62d9f5	130	if (!head)
763dbf63	131	return;
bf3994d2	132
a51c76b4 HL	133	tcf_unbind_filter(tp, &head->res);
a51c76b4 HL	134
2447a96f	135	if (!tc_skip_hw(head->flags))
b505b29f	136	mall_destroy_hw_filter(tp, head, (unsigned long) head, extack);
b87f7936	137
57767e78	138	if (tcf_exts_get_net(&head->exts))
aaa908ff	139	tcf_queue_work(&head->rwork, mall_destroy_work);
57767e78 CW	140	else
57767e78 CW	141	__mall_destroy(head);
bf3994d2 JP	142	}
bf3994d2 JP	143
8113c095	144	static void mall_get(struct tcf_proto tp, u32 handle)
bf3994d2	145	{
0db6f8be ND	146	struct cls_mall_head *head = rtnl_dereference(tp->root);
	147
	148	if (head && head->handle == handle)
	149	return head;
	150
8113c095	151	return NULL;
bf3994d2 JP	152	}
	153
	154	static const struct nla_policy mall_policy[TCA_MATCHALL_MAX + 1] = {
	155	[TCA_MATCHALL_UNSPEC] = { .type = NLA_UNSPEC },
	156	[TCA_MATCHALL_CLASSID] = { .type = NLA_U32 },
1afa3cc9	157	[TCA_MATCHALL_FLAGS] = { .type = NLA_U32 },
bf3994d2 JP	158	};
	159
	160	static int mall_set_parms(struct net net, struct tcf_proto tp,
fd62d9f5	161	struct cls_mall_head *head,
bf3994d2	162	unsigned long base, struct nlattr **tb,
c86e0209	163	struct nlattr *est, u32 flags, u32 fl_flags,
50a56190	164	struct netlink_ext_ack *extack)
bf3994d2	165	{
bf3994d2 JP	166	int err;
bf3994d2 JP	167
c86e0209 BZ	168	err = tcf_exts_validate_ex(net, tp, tb, est, &head->exts, flags,
c86e0209 BZ	169	fl_flags, extack);
bf3994d2	170	if (err < 0)
a74cb369	171	return err;
bf3994d2 JP	172
bf3994d2 JP	173	if (tb[TCA_MATCHALL_CLASSID]) {
fd62d9f5 YG	174	head->res.classid = nla_get_u32(tb[TCA_MATCHALL_CLASSID]);
fd62d9f5 YG	175	tcf_bind_filter(tp, &head->res, base);
bf3994d2	176	}
bf3994d2 JP	177	return 0;
	178	}
	179
	180	static int mall_change(struct net net, struct sk_buff in_skb,
	181	struct tcf_proto *tp, unsigned long base,
	182	u32 handle, struct nlattr **tca,
695176bf	183	void **arg, u32 flags,
12db03b6	184	struct netlink_ext_ack *extack)
bf3994d2 JP	185	{
bf3994d2 JP	186	struct cls_mall_head *head = rtnl_dereference(tp->root);
bf3994d2	187	struct nlattr *tb[TCA_MATCHALL_MAX + 1];
fd62d9f5	188	struct cls_mall_head *new;
695176bf	189	u32 userflags = 0;
bf3994d2 JP	190	int err;
	191
	192	if (!tca[TCA_OPTIONS])
	193	return -EINVAL;
	194
fd62d9f5 YG	195	if (head)
fd62d9f5 YG	196	return -EEXIST;
bf3994d2	197
8cb08174 JB	198	err = nla_parse_nested_deprecated(tb, TCA_MATCHALL_MAX,
8cb08174 JB	199	tca[TCA_OPTIONS], mall_policy, NULL);
bf3994d2 JP	200	if (err < 0)
	201	return err;
	202
b87f7936	203	if (tb[TCA_MATCHALL_FLAGS]) {
695176bf CW	204	userflags = nla_get_u32(tb[TCA_MATCHALL_FLAGS]);
695176bf CW	205	if (!tc_flags_valid(userflags))
b87f7936 YG	206	return -EINVAL;
	207	}
	208
fd62d9f5 YG	209	new = kzalloc(sizeof(*new), GFP_KERNEL);
fd62d9f5 YG	210	if (!new)
bf3994d2 JP	211	return -ENOBUFS;
bf3994d2 JP	212
14215108	213	err = tcf_exts_init(&new->exts, net, TCA_MATCHALL_ACT, 0);
ec2507d2 YG	214	if (err)
ec2507d2 YG	215	goto err_exts_init;
bf3994d2 JP	216
	217	if (!handle)
	218	handle = 1;
fd62d9f5	219	new->handle = handle;
695176bf	220	new->flags = userflags;
f88c19aa CW	221	new->pf = alloc_percpu(struct tc_matchall_pcnt);
	222	if (!new->pf) {
	223	err = -ENOMEM;
	224	goto err_alloc_percpu;
	225	}
bf3994d2	226
c86e0209 BZ	227	err = mall_set_parms(net, tp, new, base, tb, tca[TCA_RATE],
c86e0209 BZ	228	flags, new->flags, extack);
bf3994d2	229	if (err)
ec2507d2	230	goto err_set_parms;
bf3994d2	231
2447a96f	232	if (!tc_skip_hw(new->flags)) {
02798140 QM	233	err = mall_replace_hw_filter(tp, new, (unsigned long)new,
02798140 QM	234	extack);
2447a96f JP	235	if (err)
2447a96f JP	236	goto err_replace_hw_filter;
b87f7936	237	}
c7d2b2f5 OG	238
	239	if (!tc_in_hw(new->flags))
	240	new->flags \|= TCA_CLS_FLAGS_NOT_IN_HW;
b87f7936	241
8113c095	242	*arg = head;
fd62d9f5	243	rcu_assign_pointer(tp->root, new);
bf3994d2 JP	244	return 0;
bf3994d2 JP	245
ec2507d2 YG	246	err_replace_hw_filter:
ec2507d2 YG	247	err_set_parms:
f88c19aa CW	248	free_percpu(new->pf);
f88c19aa CW	249	err_alloc_percpu:
e2160156	250	tcf_exts_destroy(&new->exts);
ec2507d2	251	err_exts_init:
fd62d9f5	252	kfree(new);
bf3994d2 JP	253	return err;
	254	}
	255
571acf21	256	static int mall_delete(struct tcf_proto tp, void arg, bool *last,
12db03b6	257	bool rtnl_held, struct netlink_ext_ack *extack)
bf3994d2	258	{
f517f271 JP	259	struct cls_mall_head *head = rtnl_dereference(tp->root);
	260
	261	head->deleting = true;
	262	*last = true;
	263	return 0;
bf3994d2 JP	264	}
bf3994d2 JP	265
12db03b6 VB	266	static void mall_walk(struct tcf_proto tp, struct tcf_walker arg,
12db03b6 VB	267	bool rtnl_held)
bf3994d2 JP	268	{
bf3994d2 JP	269	struct cls_mall_head *head = rtnl_dereference(tp->root);
bf3994d2 JP	270
	271	if (arg->count < arg->skip)
	272	goto skip;
d66022cd	273
f517f271	274	if (!head \|\| head->deleting)
d66022cd	275	return;
8113c095	276	if (arg->fn(tp, head, arg) < 0)
bf3994d2 JP	277	arg->stop = 1;
	278	skip:
	279	arg->count++;
	280	}
	281
a7323311	282	static int mall_reoffload(struct tcf_proto tp, bool add, flow_setup_cb_t cb,
0efd1b3a JH	283	void cb_priv, struct netlink_ext_ack extack)
	284	{
	285	struct cls_mall_head *head = rtnl_dereference(tp->root);
	286	struct tc_cls_matchall_offload cls_mall = {};
	287	struct tcf_block *block = tp->chain->block;
	288	int err;
	289
	290	if (tc_skip_hw(head->flags))
	291	return 0;
	292
f00cbf19 PJV	293	cls_mall.rule = flow_rule_alloc(tcf_exts_num_actions(&head->exts));
	294	if (!cls_mall.rule)
	295	return -ENOMEM;
	296
d6787147	297	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
0efd1b3a JH	298	cls_mall.command = add ?
0efd1b3a JH	299	TC_CLSMATCHALL_REPLACE : TC_CLSMATCHALL_DESTROY;
0efd1b3a JH	300	cls_mall.cookie = (unsigned long)head;
0efd1b3a JH	301
c2ccf84e IS	302	err = tc_setup_offload_action(&cls_mall.rule->action, &head->exts,
c2ccf84e IS	303	cls_mall.common.extack);
f00cbf19 PJV	304	if (err) {
f00cbf19 PJV	305	kfree(cls_mall.rule);
4c096ea2 IS	306
4c096ea2 IS	307	return add && tc_skip_sw(head->flags) ? err : 0;
f00cbf19 PJV	308	}
f00cbf19 PJV	309
40119211 VB	310	err = tc_setup_cb_reoffload(block, tp, add, cb, TC_SETUP_CLSMATCHALL,
	311	&cls_mall, cb_priv, &head->flags,
	312	&head->in_hw_count);
9c1c0e12	313	tc_cleanup_offload_action(&cls_mall.rule->action);
f00cbf19 PJV	314	kfree(cls_mall.rule);
f00cbf19 PJV	315
2801f30e	316	return err;
0efd1b3a JH	317	}
0efd1b3a JH	318
b7fe4ab8 PJV	319	static void mall_stats_hw_filter(struct tcf_proto *tp,
	320	struct cls_mall_head *head,
	321	unsigned long cookie)
	322	{
	323	struct tc_cls_matchall_offload cls_mall = {};
	324	struct tcf_block *block = tp->chain->block;
	325
d6787147	326	tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, NULL);
b7fe4ab8 PJV	327	cls_mall.command = TC_CLSMATCHALL_STATS;
	328	cls_mall.cookie = cookie;
	329
40119211	330	tc_setup_cb_call(block, TC_SETUP_CLSMATCHALL, &cls_mall, false, true);
b7fe4ab8	331
bcd64368 BZ	332	tcf_exts_hw_stats_update(&head->exts, cls_mall.stats.bytes,
	333	cls_mall.stats.pkts, cls_mall.stats.drops,
	334	cls_mall.stats.lastused,
	335	cls_mall.stats.used_hw_stats,
	336	cls_mall.stats.used_hw_stats_valid);
b7fe4ab8 PJV	337	}
b7fe4ab8 PJV	338
8113c095	339	static int mall_dump(struct net net, struct tcf_proto tp, void *fh,
12db03b6	340	struct sk_buff skb, struct tcmsg t, bool rtnl_held)
bf3994d2	341	{
f88c19aa	342	struct tc_matchall_pcnt gpf = {};
8113c095	343	struct cls_mall_head *head = fh;
bf3994d2	344	struct nlattr *nest;
f88c19aa	345	int cpu;
bf3994d2	346
fd62d9f5	347	if (!head)
bf3994d2 JP	348	return skb->len;
bf3994d2 JP	349
b7fe4ab8 PJV	350	if (!tc_skip_hw(head->flags))
	351	mall_stats_hw_filter(tp, head, (unsigned long)head);
	352
fd62d9f5	353	t->tcm_handle = head->handle;
bf3994d2	354
ae0be8de	355	nest = nla_nest_start_noflag(skb, TCA_OPTIONS);
bf3994d2 JP	356	if (!nest)
	357	goto nla_put_failure;
	358
fd62d9f5 YG	359	if (head->res.classid &&
fd62d9f5 YG	360	nla_put_u32(skb, TCA_MATCHALL_CLASSID, head->res.classid))
bf3994d2 JP	361	goto nla_put_failure;
bf3994d2 JP	362
7a335ada OG	363	if (head->flags && nla_put_u32(skb, TCA_MATCHALL_FLAGS, head->flags))
	364	goto nla_put_failure;
	365
f88c19aa CW	366	for_each_possible_cpu(cpu) {
	367	struct tc_matchall_pcnt *pf = per_cpu_ptr(head->pf, cpu);
	368
	369	gpf.rhit += pf->rhit;
	370	}
	371
	372	if (nla_put_64bit(skb, TCA_MATCHALL_PCNT,
	373	sizeof(struct tc_matchall_pcnt),
	374	&gpf, TCA_MATCHALL_PAD))
	375	goto nla_put_failure;
	376
fd62d9f5	377	if (tcf_exts_dump(skb, &head->exts))
bf3994d2 JP	378	goto nla_put_failure;
	379
	380	nla_nest_end(skb, nest);
	381
fd62d9f5	382	if (tcf_exts_dump_stats(skb, &head->exts) < 0)
bf3994d2 JP	383	goto nla_put_failure;
	384
	385	return skb->len;
	386
	387	nla_put_failure:
	388	nla_nest_cancel(skb, nest);
	389	return -1;
	390	}
	391
2e24cd75 CW	392	static void mall_bind_class(void fh, u32 classid, unsigned long cl, void q,
2e24cd75 CW	393	unsigned long base)
07d79fc7 CW	394	{
	395	struct cls_mall_head *head = fh;
	396
cc9039a1	397	tc_cls_bind_class(classid, cl, q, &head->res, base);
07d79fc7 CW	398	}
07d79fc7 CW	399
bf3994d2 JP	400	static struct tcf_proto_ops cls_mall_ops __read_mostly = {
	401	.kind = "matchall",
	402	.classify = mall_classify,
	403	.init = mall_init,
	404	.destroy = mall_destroy,
	405	.get = mall_get,
	406	.change = mall_change,
	407	.delete = mall_delete,
	408	.walk = mall_walk,
0efd1b3a	409	.reoffload = mall_reoffload,
bf3994d2	410	.dump = mall_dump,
07d79fc7	411	.bind_class = mall_bind_class,
bf3994d2 JP	412	.owner = THIS_MODULE,
	413	};
	414
	415	static int __init cls_mall_init(void)
	416	{
	417	return register_tcf_proto_ops(&cls_mall_ops);
	418	}
	419
	420	static void __exit cls_mall_exit(void)
	421	{
	422	unregister_tcf_proto_ops(&cls_mall_ops);
	423	}
	424
	425	module_init(cls_mall_init);
	426	module_exit(cls_mall_exit);
	427
	428	MODULE_AUTHOR("Jiri Pirko <jiri@mellanox.com>");
	429	MODULE_DESCRIPTION("Match-all classifier");
	430	MODULE_LICENSE("GPL v2");