[thirdparty/linux.git] / net / sched / act_gact.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * net/sched/act_gact.c		Generic actions
 *
 * copyright 	Jamal Hadi Salim (2002-4)
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/rtnetlink.h>
#include <linux/module.h>
#include <linux/init.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <net/pkt_cls.h>
#include <linux/tc_act/tc_gact.h>
#include <net/tc_act/tc_gact.h>

static struct tc_action_ops act_gact_ops;

#ifdef CONFIG_GACT_PROB
static int gact_net_rand(struct tcf_gact *gact)
{
	smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */
	if (get_random_u32_below(gact->tcfg_pval))
		return gact->tcf_action;
	return gact->tcfg_paction;
}

static int gact_determ(struct tcf_gact *gact)
{
	u32 pack = atomic_inc_return(&gact->packets);

	smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */
	if (pack % gact->tcfg_pval)
		return gact->tcf_action;
	return gact->tcfg_paction;
}

typedef int (*g_rand)(struct tcf_gact *gact);
static g_rand gact_rand[MAX_RAND] = { NULL, gact_net_rand, gact_determ };
#endif /* CONFIG_GACT_PROB */

static const struct nla_policy gact_policy[TCA_GACT_MAX + 1] = {
	[TCA_GACT_PARMS]	= { .len = sizeof(struct tc_gact) },
	[TCA_GACT_PROB]		= { .len = sizeof(struct tc_gact_p) },
};

static int tcf_gact_init(struct net *net, struct nlattr *nla,
			 struct nlattr *est, struct tc_action **a,
			 struct tcf_proto *tp, u32 flags,
			 struct netlink_ext_ack *extack)
{
	struct tc_action_net *tn = net_generic(net, act_gact_ops.net_id);
	bool bind = flags & TCA_ACT_FLAGS_BIND;
	struct nlattr *tb[TCA_GACT_MAX + 1];
	struct tcf_chain *goto_ch = NULL;
	struct tc_gact *parm;
	struct tcf_gact *gact;
	int ret = 0;
	u32 index;
	int err;
#ifdef CONFIG_GACT_PROB
	struct tc_gact_p *p_parm = NULL;
#endif

	if (nla == NULL)
		return -EINVAL;

	err = nla_parse_nested_deprecated(tb, TCA_GACT_MAX, nla, gact_policy,
					  NULL);
	if (err < 0)
		return err;

	if (tb[TCA_GACT_PARMS] == NULL)
		return -EINVAL;
	parm = nla_data(tb[TCA_GACT_PARMS]);
	index = parm->index;

#ifndef CONFIG_GACT_PROB
	if (tb[TCA_GACT_PROB] != NULL)
		return -EOPNOTSUPP;
#else
	if (tb[TCA_GACT_PROB]) {
		p_parm = nla_data(tb[TCA_GACT_PROB]);
		if (p_parm->ptype >= MAX_RAND)
			return -EINVAL;
		if (TC_ACT_EXT_CMP(p_parm->paction, TC_ACT_GOTO_CHAIN)) {
			NL_SET_ERR_MSG(extack,
				       "goto chain not allowed on fallback");
			return -EINVAL;
		}
	}
#endif

	err = tcf_idr_check_alloc(tn, &index, a, bind);
	if (!err) {
		ret = tcf_idr_create_from_flags(tn, index, est, a,
						&act_gact_ops, bind, flags);
		if (ret) {
			tcf_idr_cleanup(tn, index);
			return ret;
		}
		ret = ACT_P_CREATED;
	} else if (err > 0) {
		if (bind)/* dont override defaults */
			return 0;
		if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
			tcf_idr_release(*a, bind);
			return -EEXIST;
		}
	} else {
		return err;
	}

	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	if (err < 0)
		goto release_idr;
	gact = to_gact(*a);

	spin_lock_bh(&gact->tcf_lock);
	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
#ifdef CONFIG_GACT_PROB
	if (p_parm) {
		gact->tcfg_paction = p_parm->paction;
		gact->tcfg_pval    = max_t(u16, 1, p_parm->pval);
		/* Make sure tcfg_pval is written before tcfg_ptype
		 * coupled with smp_rmb() in gact_net_rand() & gact_determ()
		 */
		smp_wmb();
		gact->tcfg_ptype   = p_parm->ptype;
	}
#endif
	spin_unlock_bh(&gact->tcf_lock);

	if (goto_ch)
		tcf_chain_put_by_act(goto_ch);

	return ret;
release_idr:
	tcf_idr_release(*a, bind);
	return err;
}

static int tcf_gact_act(struct sk_buff *skb, const struct tc_action *a,
			struct tcf_result *res)
{
	struct tcf_gact *gact = to_gact(a);
	int action = READ_ONCE(gact->tcf_action);

#ifdef CONFIG_GACT_PROB
	{
	u32 ptype = READ_ONCE(gact->tcfg_ptype);

	if (ptype)
		action = gact_rand[ptype](gact);
	}
#endif
	tcf_action_update_bstats(&gact->common, skb);
	if (action == TC_ACT_SHOT)
		tcf_action_inc_drop_qstats(&gact->common);

	tcf_lastuse_update(&gact->tcf_tm);

	return action;
}

static void tcf_gact_stats_update(struct tc_action *a, u64 bytes, u64 packets,
				  u64 drops, u64 lastuse, bool hw)
{
	struct tcf_gact *gact = to_gact(a);
	int action = READ_ONCE(gact->tcf_action);
	struct tcf_t *tm = &gact->tcf_tm;

	tcf_action_update_stats(a, bytes, packets,
				action == TC_ACT_SHOT ? packets : drops, hw);
	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
}

static int tcf_gact_dump(struct sk_buff *skb, struct tc_action *a,
			 int bind, int ref)
{
	unsigned char *b = skb_tail_pointer(skb);
	struct tcf_gact *gact = to_gact(a);
	struct tc_gact opt = {
		.index   = gact->tcf_index,
		.refcnt  = refcount_read(&gact->tcf_refcnt) - ref,
		.bindcnt = atomic_read(&gact->tcf_bindcnt) - bind,
	};
	struct tcf_t t;

	spin_lock_bh(&gact->tcf_lock);
	opt.action = gact->tcf_action;
	if (nla_put(skb, TCA_GACT_PARMS, sizeof(opt), &opt))
		goto nla_put_failure;
#ifdef CONFIG_GACT_PROB
	if (gact->tcfg_ptype) {
		struct tc_gact_p p_opt = {
			.paction = gact->tcfg_paction,
			.pval    = gact->tcfg_pval,
			.ptype   = gact->tcfg_ptype,
		};

		if (nla_put(skb, TCA_GACT_PROB, sizeof(p_opt), &p_opt))
			goto nla_put_failure;
	}
#endif
	tcf_tm_dump(&t, &gact->tcf_tm);
	if (nla_put_64bit(skb, TCA_GACT_TM, sizeof(t), &t, TCA_GACT_PAD))
		goto nla_put_failure;
	spin_unlock_bh(&gact->tcf_lock);

	return skb->len;

nla_put_failure:
	spin_unlock_bh(&gact->tcf_lock);
	nlmsg_trim(skb, b);
	return -1;
}

static size_t tcf_gact_get_fill_size(const struct tc_action *act)
{
	size_t sz = nla_total_size(sizeof(struct tc_gact)); /* TCA_GACT_PARMS */

#ifdef CONFIG_GACT_PROB
	if (to_gact(act)->tcfg_ptype)
		/* TCA_GACT_PROB */
		sz += nla_total_size(sizeof(struct tc_gact_p));
#endif

	return sz;
}

static int tcf_gact_offload_act_setup(struct tc_action *act, void *entry_data,
				      u32 *index_inc, bool bind,
				      struct netlink_ext_ack *extack)
{
	if (bind) {
		struct flow_action_entry *entry = entry_data;

		if (is_tcf_gact_ok(act)) {
			entry->id = FLOW_ACTION_ACCEPT;
		} else if (is_tcf_gact_shot(act)) {
			entry->id = FLOW_ACTION_DROP;
		} else if (is_tcf_gact_trap(act)) {
			entry->id = FLOW_ACTION_TRAP;
		} else if (is_tcf_gact_goto_chain(act)) {
			entry->id = FLOW_ACTION_GOTO;
			entry->chain_index = tcf_gact_goto_chain_index(act);
		} else if (is_tcf_gact_continue(act)) {
			NL_SET_ERR_MSG_MOD(extack, "Offload of \"continue\" action is not supported");
			return -EOPNOTSUPP;
		} else if (is_tcf_gact_reclassify(act)) {
			NL_SET_ERR_MSG_MOD(extack, "Offload of \"reclassify\" action is not supported");
			return -EOPNOTSUPP;
		} else if (is_tcf_gact_pipe(act)) {
			NL_SET_ERR_MSG_MOD(extack, "Offload of \"pipe\" action is not supported");
			return -EOPNOTSUPP;
		} else {
			NL_SET_ERR_MSG_MOD(extack, "Unsupported generic action offload");
			return -EOPNOTSUPP;
		}
		*index_inc = 1;
	} else {
		struct flow_offload_action *fl_action = entry_data;

		if (is_tcf_gact_ok(act))
			fl_action->id = FLOW_ACTION_ACCEPT;
		else if (is_tcf_gact_shot(act))
			fl_action->id = FLOW_ACTION_DROP;
		else if (is_tcf_gact_trap(act))
			fl_action->id = FLOW_ACTION_TRAP;
		else if (is_tcf_gact_goto_chain(act))
			fl_action->id = FLOW_ACTION_GOTO;
		else
			return -EOPNOTSUPP;
	}

	return 0;
}

static struct tc_action_ops act_gact_ops = {
	.kind		=	"gact",
	.id		=	TCA_ID_GACT,
	.owner		=	THIS_MODULE,
	.act		=	tcf_gact_act,
	.stats_update	=	tcf_gact_stats_update,
	.dump		=	tcf_gact_dump,
	.init		=	tcf_gact_init,
	.get_fill_size	=	tcf_gact_get_fill_size,
	.offload_act_setup =	tcf_gact_offload_act_setup,
	.size		=	sizeof(struct tcf_gact),
};

static __net_init int gact_init_net(struct net *net)
{
	struct tc_action_net *tn = net_generic(net, act_gact_ops.net_id);

	return tc_action_net_init(net, tn, &act_gact_ops);
}

static void __net_exit gact_exit_net(struct list_head *net_list)
{
	tc_action_net_exit(net_list, act_gact_ops.net_id);
}

static struct pernet_operations gact_net_ops = {
	.init = gact_init_net,
	.exit_batch = gact_exit_net,
	.id   = &act_gact_ops.net_id,
	.size = sizeof(struct tc_action_net),
};

MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
MODULE_DESCRIPTION("Generic Classifier actions");
MODULE_LICENSE("GPL");

static int __init gact_init_module(void)
{
#ifdef CONFIG_GACT_PROB
	pr_info("GACT probability on\n");
#else
	pr_info("GACT probability NOT on\n");
#endif

	return tcf_register_action(&act_gact_ops, &gact_net_ops);
}

static void __exit gact_cleanup_module(void)
{
	tcf_unregister_action(&act_gact_ops, &gact_net_ops);
}

module_init(gact_init_module);
module_exit(gact_cleanup_module);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4	2	/*
0c6965dd	3	* net/sched/act_gact.c Generic actions
1da177e4	4	*
1da177e4	5	* copyright Jamal Hadi Salim (2002-4)
1da177e4 LT	6	*/
1da177e4 LT	7
1da177e4 LT	8	#include <linux/types.h>
1da177e4 LT	9	#include <linux/kernel.h>
1da177e4	10	#include <linux/string.h>
1da177e4	11	#include <linux/errno.h>
1da177e4 LT	12	#include <linux/skbuff.h>
	13	#include <linux/rtnetlink.h>
	14	#include <linux/module.h>
	15	#include <linux/init.h>
dc5fc579	16	#include <net/netlink.h>
1da177e4	17	#include <net/pkt_sched.h>
0da2dbd6	18	#include <net/pkt_cls.h>
1da177e4 LT	19	#include <linux/tc_act/tc_gact.h>
	20	#include <net/tc_act/tc_gact.h>
	21
a85a970a	22	static struct tc_action_ops act_gact_ops;
ddf97ccd	23
1da177e4	24	#ifdef CONFIG_GACT_PROB
e9ce1cd3	25	static int gact_net_rand(struct tcf_gact *gact)
1da177e4	26	{
cef5ecf9	27	smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */
8032bf12	28	if (get_random_u32_below(gact->tcfg_pval))
e9ce1cd3 DM	29	return gact->tcf_action;
e9ce1cd3 DM	30	return gact->tcfg_paction;
1da177e4 LT	31	}
1da177e4 LT	32
e9ce1cd3	33	static int gact_determ(struct tcf_gact *gact)
1da177e4	34	{
cc6510a9 ED	35	u32 pack = atomic_inc_return(&gact->packets);
cc6510a9 ED	36
cef5ecf9	37	smp_rmb(); /* coupled with smp_wmb() in tcf_gact_init() */
cc6510a9	38	if (pack % gact->tcfg_pval)
e9ce1cd3 DM	39	return gact->tcf_action;
e9ce1cd3 DM	40	return gact->tcfg_paction;
1da177e4 LT	41	}
1da177e4 LT	42
e9ce1cd3	43	typedef int (g_rand)(struct tcf_gact gact);
cc7ec456	44	static g_rand gact_rand[MAX_RAND] = { NULL, gact_net_rand, gact_determ };
e9ce1cd3	45	#endif /* CONFIG_GACT_PROB */
1da177e4	46
53b2bf3f PM	47	static const struct nla_policy gact_policy[TCA_GACT_MAX + 1] = {
	48	[TCA_GACT_PARMS] = { .len = sizeof(struct tc_gact) },
	49	[TCA_GACT_PROB] = { .len = sizeof(struct tc_gact_p) },
	50	};
	51
c1b52739	52	static int tcf_gact_init(struct net net, struct nlattr nla,
a85a970a	53	struct nlattr est, struct tc_action *a,
abbb0d33 VB	54	struct tcf_proto *tp, u32 flags,
abbb0d33 VB	55	struct netlink_ext_ack *extack)
1da177e4	56	{
acd0a7ab	57	struct tc_action_net *tn = net_generic(net, act_gact_ops.net_id);
695176bf	58	bool bind = flags & TCA_ACT_FLAGS_BIND;
7ba699c6	59	struct nlattr *tb[TCA_GACT_MAX + 1];
0da2dbd6	60	struct tcf_chain *goto_ch = NULL;
1da177e4	61	struct tc_gact *parm;
e9ce1cd3	62	struct tcf_gact *gact;
1da177e4	63	int ret = 0;
7be8ef2c	64	u32 index;
cee63723	65	int err;
696ecdc1 HS	66	#ifdef CONFIG_GACT_PROB
	67	struct tc_gact_p *p_parm = NULL;
	68	#endif
1da177e4	69
cee63723	70	if (nla == NULL)
1da177e4 LT	71	return -EINVAL;
1da177e4 LT	72
8cb08174 JB	73	err = nla_parse_nested_deprecated(tb, TCA_GACT_MAX, nla, gact_policy,
8cb08174 JB	74	NULL);
cee63723 PM	75	if (err < 0)
	76	return err;
	77
53b2bf3f	78	if (tb[TCA_GACT_PARMS] == NULL)
1da177e4	79	return -EINVAL;
7ba699c6	80	parm = nla_data(tb[TCA_GACT_PARMS]);
7be8ef2c	81	index = parm->index;
1da177e4	82
53b2bf3f	83	#ifndef CONFIG_GACT_PROB
7ba699c6	84	if (tb[TCA_GACT_PROB] != NULL)
1da177e4	85	return -EOPNOTSUPP;
696ecdc1 HS	86	#else
	87	if (tb[TCA_GACT_PROB]) {
	88	p_parm = nla_data(tb[TCA_GACT_PROB]);
	89	if (p_parm->ptype >= MAX_RAND)
	90	return -EINVAL;
9469f375 DC	91	if (TC_ACT_EXT_CMP(p_parm->paction, TC_ACT_GOTO_CHAIN)) {
	92	NL_SET_ERR_MSG(extack,
	93	"goto chain not allowed on fallback");
	94	return -EINVAL;
	95	}
696ecdc1	96	}
1da177e4 LT	97	#endif
1da177e4 LT	98
7be8ef2c	99	err = tcf_idr_check_alloc(tn, &index, a, bind);
0190c1d4	100	if (!err) {
e3822678 VB	101	ret = tcf_idr_create_from_flags(tn, index, est, a,
e3822678 VB	102	&act_gact_ops, bind, flags);
0190c1d4	103	if (ret) {
7be8ef2c	104	tcf_idr_cleanup(tn, index);
86062033	105	return ret;
0190c1d4	106	}
1da177e4	107	ret = ACT_P_CREATED;
0190c1d4	108	} else if (err > 0) {
1a29321e JHS	109	if (bind)/* dont override defaults */
1a29321e JHS	110	return 0;
695176bf	111	if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
4e8ddd7f	112	tcf_idr_release(*a, bind);
1da177e4	113	return -EEXIST;
4e8ddd7f	114	}
0190c1d4 VB	115	} else {
0190c1d4 VB	116	return err;
1da177e4 LT	117	}
1da177e4 LT	118
0da2dbd6 DC	119	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	120	if (err < 0)
	121	goto release_idr;
a85a970a	122	gact = to_gact(*a);
e9ce1cd3	123
653cd284	124	spin_lock_bh(&gact->tcf_lock);
0da2dbd6	125	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
1da177e4	126	#ifdef CONFIG_GACT_PROB
696ecdc1	127	if (p_parm) {
e9ce1cd3	128	gact->tcfg_paction = p_parm->paction;
cef5ecf9 ED	129	gact->tcfg_pval = max_t(u16, 1, p_parm->pval);
	130	/* Make sure tcfg_pval is written before tcfg_ptype
	131	* coupled with smp_rmb() in gact_net_rand() & gact_determ()
	132	*/
	133	smp_wmb();
e9ce1cd3	134	gact->tcfg_ptype = p_parm->ptype;
1da177e4 LT	135	}
1da177e4 LT	136	#endif
653cd284	137	spin_unlock_bh(&gact->tcf_lock);
e8917f43	138
0da2dbd6 DC	139	if (goto_ch)
	140	tcf_chain_put_by_act(goto_ch);
	141
1da177e4	142	return ret;
0da2dbd6 DC	143	release_idr:
	144	tcf_idr_release(*a, bind);
	145	return err;
1da177e4 LT	146	}
1da177e4 LT	147
1740005e JHS	148	static int tcf_gact_act(struct sk_buff skb, const struct tc_action a,
1740005e JHS	149	struct tcf_result *res)
1da177e4	150	{
a85a970a	151	struct tcf_gact *gact = to_gact(a);
56e5d1ca	152	int action = READ_ONCE(gact->tcf_action);
1da177e4	153
1da177e4	154	#ifdef CONFIG_GACT_PROB
8f2ae965 ED	155	{
	156	u32 ptype = READ_ONCE(gact->tcfg_ptype);
	157
	158	if (ptype)
	159	action = gact_rand[ptype](gact);
	160	}
1da177e4	161	#endif
5e1ad95b	162	tcf_action_update_bstats(&gact->common, skb);
1da177e4	163	if (action == TC_ACT_SHOT)
26b537a8	164	tcf_action_inc_drop_qstats(&gact->common);
56e5d1ca ED	165
56e5d1ca ED	166	tcf_lastuse_update(&gact->tcf_tm);
1da177e4 LT	167
	168	return action;
	169	}
	170
4b61d3e8 PL	171	static void tcf_gact_stats_update(struct tc_action *a, u64 bytes, u64 packets,
4b61d3e8 PL	172	u64 drops, u64 lastuse, bool hw)
9fea47d9	173	{
a85a970a	174	struct tcf_gact *gact = to_gact(a);
9fea47d9 AV	175	int action = READ_ONCE(gact->tcf_action);
	176	struct tcf_t *tm = &gact->tcf_tm;
	177
4b61d3e8 PL	178	tcf_action_update_stats(a, bytes, packets,
4b61d3e8 PL	179	action == TC_ACT_SHOT ? packets : drops, hw);
3bb23421	180	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
9fea47d9 AV	181	}
9fea47d9 AV	182
0b0f43fe JHS	183	static int tcf_gact_dump(struct sk_buff skb, struct tc_action a,
0b0f43fe JHS	184	int bind, int ref)
1da177e4	185	{
27a884dc	186	unsigned char *b = skb_tail_pointer(skb);
a85a970a	187	struct tcf_gact *gact = to_gact(a);
1c40be12 ED	188	struct tc_gact opt = {
1c40be12 ED	189	.index = gact->tcf_index,
036bb443 VB	190	.refcnt = refcount_read(&gact->tcf_refcnt) - ref,
036bb443 VB	191	.bindcnt = atomic_read(&gact->tcf_bindcnt) - bind,
1c40be12	192	};
1da177e4 LT	193	struct tcf_t t;
1da177e4 LT	194
653cd284	195	spin_lock_bh(&gact->tcf_lock);
e8917f43	196	opt.action = gact->tcf_action;
1b34ec43 DM	197	if (nla_put(skb, TCA_GACT_PARMS, sizeof(opt), &opt))
1b34ec43 DM	198	goto nla_put_failure;
1da177e4	199	#ifdef CONFIG_GACT_PROB
e9ce1cd3	200	if (gact->tcfg_ptype) {
1c40be12 ED	201	struct tc_gact_p p_opt = {
	202	.paction = gact->tcfg_paction,
	203	.pval = gact->tcfg_pval,
	204	.ptype = gact->tcfg_ptype,
	205	};
	206
1b34ec43 DM	207	if (nla_put(skb, TCA_GACT_PROB, sizeof(p_opt), &p_opt))
1b34ec43 DM	208	goto nla_put_failure;
1da177e4 LT	209	}
1da177e4 LT	210	#endif
48d8ee16	211	tcf_tm_dump(&t, &gact->tcf_tm);
9854518e	212	if (nla_put_64bit(skb, TCA_GACT_TM, sizeof(t), &t, TCA_GACT_PAD))
1b34ec43	213	goto nla_put_failure;
653cd284	214	spin_unlock_bh(&gact->tcf_lock);
e8917f43	215
1da177e4 LT	216	return skb->len;
1da177e4 LT	217
7ba699c6	218	nla_put_failure:
653cd284	219	spin_unlock_bh(&gact->tcf_lock);
dc5fc579	220	nlmsg_trim(skb, b);
1da177e4 LT	221	return -1;
	222	}
	223
9c5c9c57 RM	224	static size_t tcf_gact_get_fill_size(const struct tc_action *act)
	225	{
	226	size_t sz = nla_total_size(sizeof(struct tc_gact)); /* TCA_GACT_PARMS */
	227
	228	#ifdef CONFIG_GACT_PROB
	229	if (to_gact(act)->tcfg_ptype)
	230	/* TCA_GACT_PROB */
	231	sz += nla_total_size(sizeof(struct tc_gact_p));
	232	#endif
	233
	234	return sz;
	235	}
	236
c54e1d92	237	static int tcf_gact_offload_act_setup(struct tc_action act, void entry_data,
c2ccf84e IS	238	u32 *index_inc, bool bind,
c2ccf84e IS	239	struct netlink_ext_ack *extack)
c54e1d92 BZ	240	{
	241	if (bind) {
	242	struct flow_action_entry *entry = entry_data;
	243
	244	if (is_tcf_gact_ok(act)) {
	245	entry->id = FLOW_ACTION_ACCEPT;
	246	} else if (is_tcf_gact_shot(act)) {
	247	entry->id = FLOW_ACTION_DROP;
	248	} else if (is_tcf_gact_trap(act)) {
	249	entry->id = FLOW_ACTION_TRAP;
	250	} else if (is_tcf_gact_goto_chain(act)) {
	251	entry->id = FLOW_ACTION_GOTO;
	252	entry->chain_index = tcf_gact_goto_chain_index(act);
69642c2a IS	253	} else if (is_tcf_gact_continue(act)) {
	254	NL_SET_ERR_MSG_MOD(extack, "Offload of \"continue\" action is not supported");
	255	return -EOPNOTSUPP;
	256	} else if (is_tcf_gact_reclassify(act)) {
	257	NL_SET_ERR_MSG_MOD(extack, "Offload of \"reclassify\" action is not supported");
	258	return -EOPNOTSUPP;
	259	} else if (is_tcf_gact_pipe(act)) {
	260	NL_SET_ERR_MSG_MOD(extack, "Offload of \"pipe\" action is not supported");
	261	return -EOPNOTSUPP;
c54e1d92	262	} else {
69642c2a	263	NL_SET_ERR_MSG_MOD(extack, "Unsupported generic action offload");
c54e1d92 BZ	264	return -EOPNOTSUPP;
	265	}
	266	*index_inc = 1;
	267	} else {
8cbfe939 BZ	268	struct flow_offload_action *fl_action = entry_data;
	269
	270	if (is_tcf_gact_ok(act))
	271	fl_action->id = FLOW_ACTION_ACCEPT;
	272	else if (is_tcf_gact_shot(act))
	273	fl_action->id = FLOW_ACTION_DROP;
	274	else if (is_tcf_gact_trap(act))
	275	fl_action->id = FLOW_ACTION_TRAP;
	276	else if (is_tcf_gact_goto_chain(act))
	277	fl_action->id = FLOW_ACTION_GOTO;
	278	else
	279	return -EOPNOTSUPP;
c54e1d92 BZ	280	}
	281
	282	return 0;
	283	}
	284
1da177e4 LT	285	static struct tc_action_ops act_gact_ops = {
1da177e4 LT	286	.kind = "gact",
eddd2cf1	287	.id = TCA_ID_GACT,
1da177e4	288	.owner = THIS_MODULE,
1740005e	289	.act = tcf_gact_act,
9fea47d9	290	.stats_update = tcf_gact_stats_update,
1da177e4	291	.dump = tcf_gact_dump,
1da177e4	292	.init = tcf_gact_init,
9c5c9c57	293	.get_fill_size = tcf_gact_get_fill_size,
c54e1d92	294	.offload_act_setup = tcf_gact_offload_act_setup,
a85a970a	295	.size = sizeof(struct tcf_gact),
ddf97ccd WC	296	};
	297
	298	static __net_init int gact_init_net(struct net *net)
	299	{
acd0a7ab	300	struct tc_action_net *tn = net_generic(net, act_gact_ops.net_id);
ddf97ccd	301
981471bd	302	return tc_action_net_init(net, tn, &act_gact_ops);
ddf97ccd WC	303	}
ddf97ccd WC	304
039af9c6	305	static void __net_exit gact_exit_net(struct list_head *net_list)
ddf97ccd	306	{
acd0a7ab	307	tc_action_net_exit(net_list, act_gact_ops.net_id);
ddf97ccd WC	308	}
	309
	310	static struct pernet_operations gact_net_ops = {
	311	.init = gact_init_net,
039af9c6	312	.exit_batch = gact_exit_net,
acd0a7ab	313	.id = &act_gact_ops.net_id,
ddf97ccd	314	.size = sizeof(struct tc_action_net),
1da177e4 LT	315	};
	316
	317	MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
	318	MODULE_DESCRIPTION("Generic Classifier actions");
	319	MODULE_LICENSE("GPL");
	320
e9ce1cd3	321	static int __init gact_init_module(void)
1da177e4 LT	322	{
1da177e4 LT	323	#ifdef CONFIG_GACT_PROB
cc7ec456	324	pr_info("GACT probability on\n");
1da177e4	325	#else
cc7ec456	326	pr_info("GACT probability NOT on\n");
1da177e4	327	#endif
ddf97ccd WC	328
ddf97ccd WC	329	return tcf_register_action(&act_gact_ops, &gact_net_ops);
1da177e4 LT	330	}
1da177e4 LT	331
e9ce1cd3	332	static void __exit gact_cleanup_module(void)
1da177e4	333	{
ddf97ccd	334	tcf_unregister_action(&act_gact_ops, &gact_net_ops);
1da177e4 LT	335	}
	336
	337	module_init(gact_init_module);
	338	module_exit(gact_cleanup_module);