net/sched/cls_matchall.c - linux/torvalds/linux - Git at Google

 // 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_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_add(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall,
 			      skip_sw, &head->flags, &head->in_hw_count, true);
 	tc_cleanup_flow_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, 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)
 {
 	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_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 = tc_setup_cb_reoffload(block, tp, add, cb, TC_SETUP_CLSMATCHALL,
 				    &cls_mall, cb_priv, &head->flags,
 				    &head->in_hw_count);
 	tc_cleanup_flow_action(&cls_mall.rule->action);
 	kfree(cls_mall.rule);

 	if (err)
 		return err;

 	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, true);

 	tcf_exts_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;

 	if (head && head->res.classid == classid) {
 		if (cl)
 			__tcf_bind_filter(q, &head->res, base);
 		else
 			__tcf_unbind_filter(q, &head->res);
 	}
 }

 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");
	// 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_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_add(block, tp, TC_SETUP_CLSMATCHALL, &cls_mall,
	skip_sw, &head->flags, &head->in_hw_count, true);
	tc_cleanup_flow_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, 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)
	{
	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_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 = tc_setup_cb_reoffload(block, tp, add, cb, TC_SETUP_CLSMATCHALL,
	&cls_mall, cb_priv, &head->flags,
	&head->in_hw_count);
	tc_cleanup_flow_action(&cls_mall.rule->action);
	kfree(cls_mall.rule);

	if (err)
	return err;

	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, true);

	tcf_exts_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;

	if (head && head->res.classid == classid) {
	if (cl)
	__tcf_bind_filter(q, &head->res, base);
	else
	__tcf_unbind_filter(q, &head->res);
	}
	}

	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");