[linux-block.git] / net / sched / act_pedit.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * net/sched/act_pedit.c	Generic packet editor
 *
 * Authors:	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 <linux/slab.h>
#include <net/netlink.h>
#include <net/pkt_sched.h>
#include <linux/tc_act/tc_pedit.h>
#include <net/tc_act/tc_pedit.h>
#include <uapi/linux/tc_act/tc_pedit.h>
#include <net/pkt_cls.h>
#include <net/tc_wrapper.h>

static struct tc_action_ops act_pedit_ops;

static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = {
	[TCA_PEDIT_PARMS]	= { .len = sizeof(struct tc_pedit) },
	[TCA_PEDIT_KEYS_EX]   = { .type = NLA_NESTED },
};

static const struct nla_policy pedit_key_ex_policy[TCA_PEDIT_KEY_EX_MAX + 1] = {
	[TCA_PEDIT_KEY_EX_HTYPE] =
		NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_HDR_TYPE_MAX),
	[TCA_PEDIT_KEY_EX_CMD] = NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_CMD_MAX),
};

static struct tcf_pedit_key_ex *tcf_pedit_keys_ex_parse(struct nlattr *nla,
							u8 n, struct netlink_ext_ack *extack)
{
	struct tcf_pedit_key_ex *keys_ex;
	struct tcf_pedit_key_ex *k;
	const struct nlattr *ka;
	int err = -EINVAL;
	int rem;

	if (!nla)
		return NULL;

	keys_ex = kcalloc(n, sizeof(*k), GFP_KERNEL);
	if (!keys_ex)
		return ERR_PTR(-ENOMEM);

	k = keys_ex;

	nla_for_each_nested(ka, nla, rem) {
		struct nlattr *tb[TCA_PEDIT_KEY_EX_MAX + 1];

		if (!n) {
			NL_SET_ERR_MSG_MOD(extack, "Can't parse more extended keys than requested");
			err = -EINVAL;
			goto err_out;
		}
		n--;

		if (nla_type(ka) != TCA_PEDIT_KEY_EX) {
			NL_SET_ERR_MSG_ATTR(extack, ka, "Unknown attribute, expected extended key");
			err = -EINVAL;
			goto err_out;
		}

		err = nla_parse_nested_deprecated(tb, TCA_PEDIT_KEY_EX_MAX,
						  ka, pedit_key_ex_policy,
						  NULL);
		if (err)
			goto err_out;

		if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_HTYPE)) {
			NL_SET_ERR_MSG(extack, "Missing required attribute");
			err = -EINVAL;
			goto err_out;
		}

		if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_CMD)) {
			NL_SET_ERR_MSG(extack, "Missing required attribute");
			err = -EINVAL;
			goto err_out;
		}

		k->htype = nla_get_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]);
		k->cmd = nla_get_u16(tb[TCA_PEDIT_KEY_EX_CMD]);

		k++;
	}

	if (n) {
		NL_SET_ERR_MSG_MOD(extack, "Not enough extended keys to parse");
		err = -EINVAL;
		goto err_out;
	}

	return keys_ex;

err_out:
	kfree(keys_ex);
	return ERR_PTR(err);
}

static int tcf_pedit_key_ex_dump(struct sk_buff *skb,
				 struct tcf_pedit_key_ex *keys_ex, int n)
{
	struct nlattr *keys_start = nla_nest_start_noflag(skb,
							  TCA_PEDIT_KEYS_EX);

	if (!keys_start)
		goto nla_failure;
	for (; n > 0; n--) {
		struct nlattr *key_start;

		key_start = nla_nest_start_noflag(skb, TCA_PEDIT_KEY_EX);
		if (!key_start)
			goto nla_failure;

		if (nla_put_u16(skb, TCA_PEDIT_KEY_EX_HTYPE, keys_ex->htype) ||
		    nla_put_u16(skb, TCA_PEDIT_KEY_EX_CMD, keys_ex->cmd))
			goto nla_failure;

		nla_nest_end(skb, key_start);

		keys_ex++;
	}

	nla_nest_end(skb, keys_start);

	return 0;
nla_failure:
	nla_nest_cancel(skb, keys_start);
	return -EINVAL;
}

static void tcf_pedit_cleanup_rcu(struct rcu_head *head)
{
	struct tcf_pedit_parms *parms =
		container_of(head, struct tcf_pedit_parms, rcu);

	kfree(parms->tcfp_keys_ex);
	kfree(parms->tcfp_keys);

	kfree(parms);
}

static int tcf_pedit_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_pedit_ops.net_id);
	bool bind = flags & TCA_ACT_FLAGS_BIND;
	struct tcf_chain *goto_ch = NULL;
	struct tcf_pedit_parms *oparms, *nparms;
	struct nlattr *tb[TCA_PEDIT_MAX + 1];
	struct tc_pedit *parm;
	struct nlattr *pattr;
	struct tcf_pedit *p;
	int ret = 0, err;
	int i, ksize;
	u32 index;

	if (!nla) {
		NL_SET_ERR_MSG_MOD(extack, "Pedit requires attributes to be passed");
		return -EINVAL;
	}

	err = nla_parse_nested_deprecated(tb, TCA_PEDIT_MAX, nla,
					  pedit_policy, NULL);
	if (err < 0)
		return err;

	pattr = tb[TCA_PEDIT_PARMS];
	if (!pattr)
		pattr = tb[TCA_PEDIT_PARMS_EX];
	if (!pattr) {
		NL_SET_ERR_MSG_MOD(extack, "Missing required TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute");
		return -EINVAL;
	}

	parm = nla_data(pattr);

	index = parm->index;
	err = tcf_idr_check_alloc(tn, &index, a, bind);
	if (!err) {
		ret = tcf_idr_create_from_flags(tn, index, est, a,
						&act_pedit_ops, bind, flags);
		if (ret) {
			tcf_idr_cleanup(tn, index);
			return ret;
		}
		ret = ACT_P_CREATED;
	} else if (err > 0) {
		if (bind)
			return 0;
		if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
			ret = -EEXIST;
			goto out_release;
		}
	} else {
		return err;
	}

	if (!parm->nkeys) {
		NL_SET_ERR_MSG_MOD(extack, "Pedit requires keys to be passed");
		ret = -EINVAL;
		goto out_release;
	}
	ksize = parm->nkeys * sizeof(struct tc_pedit_key);
	if (nla_len(pattr) < sizeof(*parm) + ksize) {
		NL_SET_ERR_MSG_ATTR(extack, pattr, "Length of TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute is invalid");
		ret = -EINVAL;
		goto out_release;
	}

	nparms = kzalloc(sizeof(*nparms), GFP_KERNEL);
	if (!nparms) {
		ret = -ENOMEM;
		goto out_release;
	}

	nparms->tcfp_keys_ex =
		tcf_pedit_keys_ex_parse(tb[TCA_PEDIT_KEYS_EX], parm->nkeys, extack);
	if (IS_ERR(nparms->tcfp_keys_ex)) {
		ret = PTR_ERR(nparms->tcfp_keys_ex);
		goto out_free;
	}

	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	if (err < 0) {
		ret = err;
		goto out_free_ex;
	}

	nparms->tcfp_off_max_hint = 0;
	nparms->tcfp_flags = parm->flags;
	nparms->tcfp_nkeys = parm->nkeys;

	nparms->tcfp_keys = kmalloc(ksize, GFP_KERNEL);
	if (!nparms->tcfp_keys) {
		ret = -ENOMEM;
		goto put_chain;
	}

	memcpy(nparms->tcfp_keys, parm->keys, ksize);

	for (i = 0; i < nparms->tcfp_nkeys; ++i) {
		u32 offmask = nparms->tcfp_keys[i].offmask;
		u32 cur = nparms->tcfp_keys[i].off;

		/* The AT option can be added to static offsets in the datapath */
		if (!offmask && cur % 4) {
			NL_SET_ERR_MSG_MOD(extack, "Offsets must be on 32bit boundaries");
			ret = -EINVAL;
			goto out_free_keys;
		}

		/* sanitize the shift value for any later use */
		nparms->tcfp_keys[i].shift = min_t(size_t,
						   BITS_PER_TYPE(int) - 1,
						   nparms->tcfp_keys[i].shift);

		/* The AT option can read a single byte, we can bound the actual
		 * value with uchar max.
		 */
		cur += (0xff & offmask) >> nparms->tcfp_keys[i].shift;

		/* Each key touches 4 bytes starting from the computed offset */
		nparms->tcfp_off_max_hint =
			max(nparms->tcfp_off_max_hint, cur + 4);
	}

	p = to_pedit(*a);

	spin_lock_bh(&p->tcf_lock);
	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
	oparms = rcu_replace_pointer(p->parms, nparms, 1);
	spin_unlock_bh(&p->tcf_lock);

	if (oparms)
		call_rcu(&oparms->rcu, tcf_pedit_cleanup_rcu);

	if (goto_ch)
		tcf_chain_put_by_act(goto_ch);

	return ret;

out_free_keys:
	kfree(nparms->tcfp_keys);
put_chain:
	if (goto_ch)
		tcf_chain_put_by_act(goto_ch);
out_free_ex:
	kfree(nparms->tcfp_keys_ex);
out_free:
	kfree(nparms);
out_release:
	tcf_idr_release(*a, bind);
	return ret;
}

static void tcf_pedit_cleanup(struct tc_action *a)
{
	struct tcf_pedit *p = to_pedit(a);
	struct tcf_pedit_parms *parms;

	parms = rcu_dereference_protected(p->parms, 1);

	if (parms)
		call_rcu(&parms->rcu, tcf_pedit_cleanup_rcu);
}

static bool offset_valid(struct sk_buff *skb, int offset)
{
	if (offset > 0 && offset > skb->len)
		return false;

	if  (offset < 0 && -offset > skb_headroom(skb))
		return false;

	return true;
}

static void pedit_skb_hdr_offset(struct sk_buff *skb,
				 enum pedit_header_type htype, int *hoffset)
{
	/* 'htype' is validated in the netlink parsing */
	switch (htype) {
	case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
		if (skb_mac_header_was_set(skb))
			*hoffset = skb_mac_offset(skb);
		break;
	case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK:
	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
		*hoffset = skb_network_offset(skb);
		break;
	case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
	case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
		if (skb_transport_header_was_set(skb))
			*hoffset = skb_transport_offset(skb);
		break;
	default:
		break;
	}
}

TC_INDIRECT_SCOPE int tcf_pedit_act(struct sk_buff *skb,
				    const struct tc_action *a,
				    struct tcf_result *res)
{
	enum pedit_header_type htype = TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
	enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET;
	struct tcf_pedit *p = to_pedit(a);
	struct tcf_pedit_key_ex *tkey_ex;
	struct tcf_pedit_parms *parms;
	struct tc_pedit_key *tkey;
	u32 max_offset;
	int i;

	parms = rcu_dereference_bh(p->parms);

	max_offset = (skb_transport_header_was_set(skb) ?
		      skb_transport_offset(skb) :
		      skb_network_offset(skb)) +
		     parms->tcfp_off_max_hint;
	if (skb_ensure_writable(skb, min(skb->len, max_offset)))
		goto done;

	tcf_lastuse_update(&p->tcf_tm);
	tcf_action_update_bstats(&p->common, skb);

	tkey = parms->tcfp_keys;
	tkey_ex = parms->tcfp_keys_ex;

	for (i = parms->tcfp_nkeys; i > 0; i--, tkey++) {
		int offset = tkey->off;
		int hoffset = 0;
		u32 *ptr, hdata;
		u32 val;

		if (tkey_ex) {
			htype = tkey_ex->htype;
			cmd = tkey_ex->cmd;

			tkey_ex++;
		}

		pedit_skb_hdr_offset(skb, htype, &hoffset);

		if (tkey->offmask) {
			u8 *d, _d;

			if (!offset_valid(skb, hoffset + tkey->at)) {
				pr_info_ratelimited("tc action pedit 'at' offset %d out of bounds\n",
						    hoffset + tkey->at);
				goto bad;
			}
			d = skb_header_pointer(skb, hoffset + tkey->at,
					       sizeof(_d), &_d);
			if (!d)
				goto bad;

			offset += (*d & tkey->offmask) >> tkey->shift;
			if (offset % 4) {
				pr_info_ratelimited("tc action pedit offset must be on 32 bit boundaries\n");
				goto bad;
			}
		}

		if (!offset_valid(skb, hoffset + offset)) {
			pr_info_ratelimited("tc action pedit offset %d out of bounds\n", hoffset + offset);
			goto bad;
		}

		ptr = skb_header_pointer(skb, hoffset + offset,
					 sizeof(hdata), &hdata);
		if (!ptr)
			goto bad;
		/* just do it, baby */
		switch (cmd) {
		case TCA_PEDIT_KEY_EX_CMD_SET:
			val = tkey->val;
			break;
		case TCA_PEDIT_KEY_EX_CMD_ADD:
			val = (*ptr + tkey->val) & ~tkey->mask;
			break;
		default:
			pr_info_ratelimited("tc action pedit bad command (%d)\n", cmd);
			goto bad;
		}

		*ptr = ((*ptr & tkey->mask) ^ val);
		if (ptr == &hdata)
			skb_store_bits(skb, hoffset + offset, ptr, 4);
	}

	goto done;

bad:
	tcf_action_inc_overlimit_qstats(&p->common);
done:
	return p->tcf_action;
}

static void tcf_pedit_stats_update(struct tc_action *a, u64 bytes, u64 packets,
				   u64 drops, u64 lastuse, bool hw)
{
	struct tcf_pedit *d = to_pedit(a);
	struct tcf_t *tm = &d->tcf_tm;

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

static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a,
			  int bind, int ref)
{
	unsigned char *b = skb_tail_pointer(skb);
	struct tcf_pedit *p = to_pedit(a);
	struct tcf_pedit_parms *parms;
	struct tc_pedit *opt;
	struct tcf_t t;
	int s;

	spin_lock_bh(&p->tcf_lock);
	parms = rcu_dereference_protected(p->parms, 1);
	s = struct_size(opt, keys, parms->tcfp_nkeys);

	opt = kzalloc(s, GFP_ATOMIC);
	if (unlikely(!opt)) {
		spin_unlock_bh(&p->tcf_lock);
		return -ENOBUFS;
	}

	memcpy(opt->keys, parms->tcfp_keys,
	       flex_array_size(opt, keys, parms->tcfp_nkeys));
	opt->index = p->tcf_index;
	opt->nkeys = parms->tcfp_nkeys;
	opt->flags = parms->tcfp_flags;
	opt->action = p->tcf_action;
	opt->refcnt = refcount_read(&p->tcf_refcnt) - ref;
	opt->bindcnt = atomic_read(&p->tcf_bindcnt) - bind;

	if (parms->tcfp_keys_ex) {
		if (tcf_pedit_key_ex_dump(skb, parms->tcfp_keys_ex,
					  parms->tcfp_nkeys))
			goto nla_put_failure;

		if (nla_put(skb, TCA_PEDIT_PARMS_EX, s, opt))
			goto nla_put_failure;
	} else {
		if (nla_put(skb, TCA_PEDIT_PARMS, s, opt))
			goto nla_put_failure;
	}

	tcf_tm_dump(&t, &p->tcf_tm);
	if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD))
		goto nla_put_failure;
	spin_unlock_bh(&p->tcf_lock);

	kfree(opt);
	return skb->len;

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

static int tcf_pedit_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;
		int k;

		for (k = 0; k < tcf_pedit_nkeys(act); k++) {
			switch (tcf_pedit_cmd(act, k)) {
			case TCA_PEDIT_KEY_EX_CMD_SET:
				entry->id = FLOW_ACTION_MANGLE;
				break;
			case TCA_PEDIT_KEY_EX_CMD_ADD:
				entry->id = FLOW_ACTION_ADD;
				break;
			default:
				NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
				return -EOPNOTSUPP;
			}
			entry->mangle.htype = tcf_pedit_htype(act, k);
			entry->mangle.mask = tcf_pedit_mask(act, k);
			entry->mangle.val = tcf_pedit_val(act, k);
			entry->mangle.offset = tcf_pedit_offset(act, k);
			entry->hw_stats = tc_act_hw_stats(act->hw_stats);
			entry++;
		}
		*index_inc = k;
	} else {
		struct flow_offload_action *fl_action = entry_data;
		u32 cmd = tcf_pedit_cmd(act, 0);
		int k;

		switch (cmd) {
		case TCA_PEDIT_KEY_EX_CMD_SET:
			fl_action->id = FLOW_ACTION_MANGLE;
			break;
		case TCA_PEDIT_KEY_EX_CMD_ADD:
			fl_action->id = FLOW_ACTION_ADD;
			break;
		default:
			NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
			return -EOPNOTSUPP;
		}

		for (k = 1; k < tcf_pedit_nkeys(act); k++) {
			if (cmd != tcf_pedit_cmd(act, k)) {
				NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
				return -EOPNOTSUPP;
			}
		}
	}

	return 0;
}

static struct tc_action_ops act_pedit_ops = {
	.kind		=	"pedit",
	.id		=	TCA_ID_PEDIT,
	.owner		=	THIS_MODULE,
	.act		=	tcf_pedit_act,
	.stats_update	=	tcf_pedit_stats_update,
	.dump		=	tcf_pedit_dump,
	.cleanup	=	tcf_pedit_cleanup,
	.init		=	tcf_pedit_init,
	.offload_act_setup =	tcf_pedit_offload_act_setup,
	.size		=	sizeof(struct tcf_pedit),
};

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

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

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

static struct pernet_operations pedit_net_ops = {
	.init = pedit_init_net,
	.exit_batch = pedit_exit_net,
	.id   = &act_pedit_ops.net_id,
	.size = sizeof(struct tc_action_net),
};

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

static int __init pedit_init_module(void)
{
	return tcf_register_action(&act_pedit_ops, &pedit_net_ops);
}

static void __exit pedit_cleanup_module(void)
{
	tcf_unregister_action(&act_pedit_ops, &pedit_net_ops);
}

module_init(pedit_init_module);
module_exit(pedit_cleanup_module);
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4	2	/*
0c6965dd	3	* net/sched/act_pedit.c Generic packet editor
1da177e4	4	*
1da177e4 LT	5	* Authors: Jamal Hadi Salim (2002-4)
	6	*/
	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>
5a0e3ad6	16	#include <linux/slab.h>
dc5fc579	17	#include <net/netlink.h>
1da177e4 LT	18	#include <net/pkt_sched.h>
	19	#include <linux/tc_act/tc_pedit.h>
	20	#include <net/tc_act/tc_pedit.h>
71d0ed70	21	#include <uapi/linux/tc_act/tc_pedit.h>
6ac86ca3	22	#include <net/pkt_cls.h>
871cf386	23	#include <net/tc_wrapper.h>
1da177e4	24
a85a970a	25	static struct tc_action_ops act_pedit_ops;
ddf97ccd	26
53b2bf3f	27	static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = {
53f7e35f	28	[TCA_PEDIT_PARMS] = { .len = sizeof(struct tc_pedit) },
71d0ed70	29	[TCA_PEDIT_KEYS_EX] = { .type = NLA_NESTED },
53b2bf3f PM	30	};
53b2bf3f PM	31
71d0ed70	32	static const struct nla_policy pedit_key_ex_policy[TCA_PEDIT_KEY_EX_MAX + 1] = {
50360345 PT	33	[TCA_PEDIT_KEY_EX_HTYPE] =
	34	NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_HDR_TYPE_MAX),
	35	[TCA_PEDIT_KEY_EX_CMD] = NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_CMD_MAX),
71d0ed70 AV	36	};
	37
	38	static struct tcf_pedit_key_ex tcf_pedit_keys_ex_parse(struct nlattr nla,
0c83c521	39	u8 n, struct netlink_ext_ack *extack)
71d0ed70 AV	40	{
	41	struct tcf_pedit_key_ex *keys_ex;
	42	struct tcf_pedit_key_ex *k;
	43	const struct nlattr *ka;
	44	int err = -EINVAL;
	45	int rem;
	46
f67169fe	47	if (!nla)
71d0ed70 AV	48	return NULL;
	49
	50	keys_ex = kcalloc(n, sizeof(*k), GFP_KERNEL);
	51	if (!keys_ex)
	52	return ERR_PTR(-ENOMEM);
	53
	54	k = keys_ex;
	55
	56	nla_for_each_nested(ka, nla, rem) {
	57	struct nlattr *tb[TCA_PEDIT_KEY_EX_MAX + 1];
	58
	59	if (!n) {
0c83c521	60	NL_SET_ERR_MSG_MOD(extack, "Can't parse more extended keys than requested");
71d0ed70 AV	61	err = -EINVAL;
	62	goto err_out;
	63	}
	64	n--;
	65
	66	if (nla_type(ka) != TCA_PEDIT_KEY_EX) {
0c83c521	67	NL_SET_ERR_MSG_ATTR(extack, ka, "Unknown attribute, expected extended key");
71d0ed70 AV	68	err = -EINVAL;
	69	goto err_out;
	70	}
	71
8cb08174 JB	72	err = nla_parse_nested_deprecated(tb, TCA_PEDIT_KEY_EX_MAX,
	73	ka, pedit_key_ex_policy,
	74	NULL);
71d0ed70 AV	75	if (err)
	76	goto err_out;
	77
0c83c521 PT	78	if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_HTYPE)) {
	79	NL_SET_ERR_MSG(extack, "Missing required attribute");
	80	err = -EINVAL;
	81	goto err_out;
	82	}
	83
	84	if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_CMD)) {
	85	NL_SET_ERR_MSG(extack, "Missing required attribute");
71d0ed70 AV	86	err = -EINVAL;
	87	goto err_out;
	88	}
	89
	90	k->htype = nla_get_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]);
853a14ba	91	k->cmd = nla_get_u16(tb[TCA_PEDIT_KEY_EX_CMD]);
71d0ed70	92
71d0ed70 AV	93	k++;
	94	}
	95
c4f65b09	96	if (n) {
0c83c521	97	NL_SET_ERR_MSG_MOD(extack, "Not enough extended keys to parse");
c4f65b09	98	err = -EINVAL;
71d0ed70	99	goto err_out;
c4f65b09	100	}
71d0ed70 AV	101
	102	return keys_ex;
	103
	104	err_out:
	105	kfree(keys_ex);
	106	return ERR_PTR(err);
	107	}
	108
	109	static int tcf_pedit_key_ex_dump(struct sk_buff *skb,
	110	struct tcf_pedit_key_ex *keys_ex, int n)
	111	{
ae0be8de MK	112	struct nlattr *keys_start = nla_nest_start_noflag(skb,
ae0be8de MK	113	TCA_PEDIT_KEYS_EX);
71d0ed70	114
85eb9af1 DC	115	if (!keys_start)
85eb9af1 DC	116	goto nla_failure;
71d0ed70 AV	117	for (; n > 0; n--) {
	118	struct nlattr *key_start;
	119
ae0be8de	120	key_start = nla_nest_start_noflag(skb, TCA_PEDIT_KEY_EX);
85eb9af1 DC	121	if (!key_start)
85eb9af1 DC	122	goto nla_failure;
71d0ed70	123
853a14ba	124	if (nla_put_u16(skb, TCA_PEDIT_KEY_EX_HTYPE, keys_ex->htype) \|\|
85eb9af1 DC	125	nla_put_u16(skb, TCA_PEDIT_KEY_EX_CMD, keys_ex->cmd))
85eb9af1 DC	126	goto nla_failure;
71d0ed70 AV	127
	128	nla_nest_end(skb, key_start);
	129
	130	keys_ex++;
	131	}
	132
	133	nla_nest_end(skb, keys_start);
	134
	135	return 0;
85eb9af1 DC	136	nla_failure:
	137	nla_nest_cancel(skb, keys_start);
	138	return -EINVAL;
71d0ed70 AV	139	}
71d0ed70 AV	140
52cf89f7 PT	141	static void tcf_pedit_cleanup_rcu(struct rcu_head *head)
	142	{
	143	struct tcf_pedit_parms *parms =
	144	container_of(head, struct tcf_pedit_parms, rcu);
	145
	146	kfree(parms->tcfp_keys_ex);
	147	kfree(parms->tcfp_keys);
	148
	149	kfree(parms);
	150	}
	151
c1b52739	152	static int tcf_pedit_init(struct net net, struct nlattr nla,
a85a970a	153	struct nlattr est, struct tc_action *a,
abbb0d33 VB	154	struct tcf_proto *tp, u32 flags,
abbb0d33 VB	155	struct netlink_ext_ack *extack)
1da177e4	156	{
acd0a7ab	157	struct tc_action_net *tn = net_generic(net, act_pedit_ops.net_id);
695176bf	158	bool bind = flags & TCA_ACT_FLAGS_BIND;
6ac86ca3	159	struct tcf_chain *goto_ch = NULL;
52cf89f7 PT	160	struct tcf_pedit_parms oparms, nparms;
52cf89f7 PT	161	struct nlattr *tb[TCA_PEDIT_MAX + 1];
80f0f574 RM	162	struct tc_pedit *parm;
	163	struct nlattr *pattr;
	164	struct tcf_pedit *p;
	165	int ret = 0, err;
8b796475	166	int i, ksize;
7be8ef2c	167	u32 index;
1da177e4	168
9868c0b2 RM	169	if (!nla) {
9868c0b2 RM	170	NL_SET_ERR_MSG_MOD(extack, "Pedit requires attributes to be passed");
1da177e4	171	return -EINVAL;
9868c0b2	172	}
1da177e4	173
8cb08174 JB	174	err = nla_parse_nested_deprecated(tb, TCA_PEDIT_MAX, nla,
8cb08174 JB	175	pedit_policy, NULL);
cee63723 PM	176	if (err < 0)
	177	return err;
	178
71d0ed70 AV	179	pattr = tb[TCA_PEDIT_PARMS];
	180	if (!pattr)
	181	pattr = tb[TCA_PEDIT_PARMS_EX];
9868c0b2 RM	182	if (!pattr) {
9868c0b2 RM	183	NL_SET_ERR_MSG_MOD(extack, "Missing required TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute");
1da177e4	184	return -EINVAL;
9868c0b2	185	}
71d0ed70 AV	186
71d0ed70 AV	187	parm = nla_data(pattr);
71d0ed70	188
7be8ef2c DL	189	index = parm->index;
7be8ef2c DL	190	err = tcf_idr_check_alloc(tn, &index, a, bind);
0190c1d4	191	if (!err) {
52cf89f7 PT	192	ret = tcf_idr_create_from_flags(tn, index, est, a,
52cf89f7 PT	193	&act_pedit_ops, bind, flags);
0190c1d4	194	if (ret) {
7be8ef2c	195	tcf_idr_cleanup(tn, index);
e9e42292	196	return ret;
0190c1d4	197	}
1da177e4	198	ret = ACT_P_CREATED;
0190c1d4	199	} else if (err > 0) {
1a29321e	200	if (bind)
e9e42292	201	return 0;
695176bf	202	if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
30e99ed6	203	ret = -EEXIST;
67b0c1a3	204	goto out_release;
1da177e4	205	}
0190c1d4	206	} else {
e9e42292 PT	207	return err;
	208	}
	209
	210	if (!parm->nkeys) {
	211	NL_SET_ERR_MSG_MOD(extack, "Pedit requires keys to be passed");
	212	ret = -EINVAL;
	213	goto out_release;
	214	}
	215	ksize = parm->nkeys * sizeof(struct tc_pedit_key);
	216	if (nla_len(pattr) < sizeof(*parm) + ksize) {
	217	NL_SET_ERR_MSG_ATTR(extack, pattr, "Length of TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute is invalid");
	218	ret = -EINVAL;
	219	goto out_release;
	220	}
	221
	222	nparms = kzalloc(sizeof(*nparms), GFP_KERNEL);
	223	if (!nparms) {
	224	ret = -ENOMEM;
	225	goto out_release;
	226	}
	227
	228	nparms->tcfp_keys_ex =
0c83c521	229	tcf_pedit_keys_ex_parse(tb[TCA_PEDIT_KEYS_EX], parm->nkeys, extack);
e9e42292 PT	230	if (IS_ERR(nparms->tcfp_keys_ex)) {
	231	ret = PTR_ERR(nparms->tcfp_keys_ex);
	232	goto out_free;
1da177e4 LT	233	}
1da177e4 LT	234
6ac86ca3 DC	235	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
	236	if (err < 0) {
	237	ret = err;
e9e42292	238	goto out_free_ex;
6ac86ca3	239	}
67b0c1a3	240
52cf89f7 PT	241	nparms->tcfp_off_max_hint = 0;
	242	nparms->tcfp_flags = parm->flags;
	243	nparms->tcfp_nkeys = parm->nkeys;
	244
	245	nparms->tcfp_keys = kmalloc(ksize, GFP_KERNEL);
	246	if (!nparms->tcfp_keys) {
	247	ret = -ENOMEM;
	248	goto put_chain;
1da177e4	249	}
52cf89f7 PT	250
	251	memcpy(nparms->tcfp_keys, parm->keys, ksize);
	252
	253	for (i = 0; i < nparms->tcfp_nkeys; ++i) {
e1201bc7	254	u32 offmask = nparms->tcfp_keys[i].offmask;
52cf89f7	255	u32 cur = nparms->tcfp_keys[i].off;
8b796475	256
e1201bc7 PT	257	/* The AT option can be added to static offsets in the datapath */
	258	if (!offmask && cur % 4) {
	259	NL_SET_ERR_MSG_MOD(extack, "Offsets must be on 32bit boundaries");
	260	ret = -EINVAL;
1b483d9f	261	goto out_free_keys;
e1201bc7 PT	262	}
e1201bc7 PT	263
4d42d54a	264	/* sanitize the shift value for any later use */
52cf89f7 PT	265	nparms->tcfp_keys[i].shift = min_t(size_t,
	266	BITS_PER_TYPE(int) - 1,
	267	nparms->tcfp_keys[i].shift);
4d42d54a	268
8b796475 PA	269	/* The AT option can read a single byte, we can bound the actual
	270	* value with uchar max.
	271	*/
e1201bc7	272	cur += (0xff & offmask) >> nparms->tcfp_keys[i].shift;
8b796475 PA	273
8b796475 PA	274	/* Each key touches 4 bytes starting from the computed offset */
52cf89f7 PT	275	nparms->tcfp_off_max_hint =
52cf89f7 PT	276	max(nparms->tcfp_off_max_hint, cur + 4);
8b796475	277	}
71d0ed70	278
52cf89f7 PT	279	p = to_pedit(*a);
	280
	281	spin_lock_bh(&p->tcf_lock);
6ac86ca3	282	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
52cf89f7 PT	283	oparms = rcu_replace_pointer(p->parms, nparms, 1);
52cf89f7 PT	284	spin_unlock_bh(&p->tcf_lock);
67b0c1a3	285
52cf89f7 PT	286	if (oparms)
52cf89f7 PT	287	call_rcu(&oparms->rcu, tcf_pedit_cleanup_rcu);
71d0ed70	288
6ac86ca3 DC	289	if (goto_ch)
6ac86ca3 DC	290	tcf_chain_put_by_act(goto_ch);
52cf89f7	291
1da177e4	292	return ret;
67b0c1a3	293
1b483d9f PT	294	out_free_keys:
1b483d9f PT	295	kfree(nparms->tcfp_keys);
6ac86ca3 DC	296	put_chain:
	297	if (goto_ch)
	298	tcf_chain_put_by_act(goto_ch);
52cf89f7 PT	299	out_free_ex:
52cf89f7 PT	300	kfree(nparms->tcfp_keys_ex);
30e99ed6	301	out_free:
52cf89f7	302	kfree(nparms);
e9e42292 PT	303	out_release:
e9e42292 PT	304	tcf_idr_release(*a, bind);
30e99ed6	305	return ret;
1da177e4 LT	306	}
1da177e4 LT	307
9a63b255	308	static void tcf_pedit_cleanup(struct tc_action *a)
1da177e4	309	{
a85a970a	310	struct tcf_pedit *p = to_pedit(a);
52cf89f7	311	struct tcf_pedit_parms *parms;
80f0f574	312
52cf89f7 PT	313	parms = rcu_dereference_protected(p->parms, 1);
	314
	315	if (parms)
	316	call_rcu(&parms->rcu, tcf_pedit_cleanup_rcu);
1da177e4 LT	317	}
1da177e4 LT	318
95c2027b AV	319	static bool offset_valid(struct sk_buff *skb, int offset)
	320	{
	321	if (offset > 0 && offset > skb->len)
	322	return false;
	323
	324	if (offset < 0 && -offset > skb_headroom(skb))
	325	return false;
	326
	327	return true;
	328	}
	329
57714018 PT	330	static void pedit_skb_hdr_offset(struct sk_buff *skb,
57714018 PT	331	enum pedit_header_type htype, int *hoffset)
71d0ed70	332	{
57714018	333	/* 'htype' is validated in the netlink parsing */
71d0ed70 AV	334	switch (htype) {
71d0ed70 AV	335	case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
57714018	336	if (skb_mac_header_was_set(skb))
71d0ed70	337	*hoffset = skb_mac_offset(skb);
71d0ed70 AV	338	break;
	339	case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK:
	340	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
	341	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
	342	*hoffset = skb_network_offset(skb);
71d0ed70 AV	343	break;
	344	case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
	345	case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
57714018	346	if (skb_transport_header_was_set(skb))
71d0ed70	347	*hoffset = skb_transport_offset(skb);
71d0ed70 AV	348	break;
71d0ed70 AV	349	default:
71d0ed70	350	break;
0a80848e	351	}
71d0ed70 AV	352	}
71d0ed70 AV	353
871cf386 PT	354	TC_INDIRECT_SCOPE int tcf_pedit_act(struct sk_buff *skb,
	355	const struct tc_action *a,
	356	struct tcf_result *res)
1da177e4	357	{
95b06938 PT	358	enum pedit_header_type htype = TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
95b06938 PT	359	enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET;
a85a970a	360	struct tcf_pedit *p = to_pedit(a);
95b06938	361	struct tcf_pedit_key_ex *tkey_ex;
52cf89f7	362	struct tcf_pedit_parms *parms;
95b06938	363	struct tc_pedit_key *tkey;
8b796475	364	u32 max_offset;
4749c3ef	365	int i;
1da177e4	366
52cf89f7	367	parms = rcu_dereference_bh(p->parms);
1da177e4	368
8b796475 PA	369	max_offset = (skb_transport_header_was_set(skb) ?
	370	skb_transport_offset(skb) :
	371	skb_network_offset(skb)) +
52cf89f7	372	parms->tcfp_off_max_hint;
8b796475	373	if (skb_ensure_writable(skb, min(skb->len, max_offset)))
52cf89f7	374	goto done;
8b796475	375
9c4a4e48	376	tcf_lastuse_update(&p->tcf_tm);
52cf89f7	377	tcf_action_update_bstats(&p->common, skb);
1da177e4	378
95b06938 PT	379	tkey = parms->tcfp_keys;
95b06938 PT	380	tkey_ex = parms->tcfp_keys_ex;
71d0ed70	381
95b06938 PT	382	for (i = parms->tcfp_nkeys; i > 0; i--, tkey++) {
95b06938 PT	383	int offset = tkey->off;
57714018	384	int hoffset = 0;
95b06938	385	u32 *ptr, hdata;
95b06938	386	u32 val;
1da177e4	387
95b06938 PT	388	if (tkey_ex) {
	389	htype = tkey_ex->htype;
	390	cmd = tkey_ex->cmd;
1da177e4	391
95b06938 PT	392	tkey_ex++;
95b06938 PT	393	}
95c2027b	394
57714018	395	pedit_skb_hdr_offset(skb, htype, &hoffset);
1da177e4	396
95b06938 PT	397	if (tkey->offmask) {
	398	u8 *d, _d;
	399
	400	if (!offset_valid(skb, hoffset + tkey->at)) {
e3c9673e PT	401	pr_info_ratelimited("tc action pedit 'at' offset %d out of bounds\n",
e3c9673e PT	402	hoffset + tkey->at);
853a14ba AV	403	goto bad;
853a14ba AV	404	}
95b06938 PT	405	d = skb_header_pointer(skb, hoffset + tkey->at,
	406	sizeof(_d), &_d);
	407	if (!d)
	408	goto bad;
853a14ba	409
e1201bc7 PT	410	offset += (*d & tkey->offmask) >> tkey->shift;
e1201bc7 PT	411	if (offset % 4) {
e3c9673e	412	pr_info_ratelimited("tc action pedit offset must be on 32 bit boundaries\n");
e1201bc7 PT	413	goto bad;
e1201bc7 PT	414	}
1da177e4	415	}
10297b99	416
95b06938	417	if (!offset_valid(skb, hoffset + offset)) {
e3c9673e	418	pr_info_ratelimited("tc action pedit offset %d out of bounds\n", hoffset + offset);
95b06938 PT	419	goto bad;
	420	}
	421
	422	ptr = skb_header_pointer(skb, hoffset + offset,
	423	sizeof(hdata), &hdata);
	424	if (!ptr)
	425	goto bad;
	426	/* just do it, baby */
	427	switch (cmd) {
	428	case TCA_PEDIT_KEY_EX_CMD_SET:
	429	val = tkey->val;
	430	break;
	431	case TCA_PEDIT_KEY_EX_CMD_ADD:
	432	val = (*ptr + tkey->val) & ~tkey->mask;
	433	break;
	434	default:
e3c9673e	435	pr_info_ratelimited("tc action pedit bad command (%d)\n", cmd);
95b06938 PT	436	goto bad;
	437	}
	438
	439	ptr = ((ptr & tkey->mask) ^ val);
	440	if (ptr == &hdata)
	441	skb_store_bits(skb, hoffset + offset, ptr, 4);
80f0f574	442	}
1da177e4	443
95b06938 PT	444	goto done;
95b06938 PT	445
1da177e4	446	bad:
2d2e75d2	447	tcf_action_inc_overlimit_qstats(&p->common);
52cf89f7	448	done:
e9ce1cd3	449	return p->tcf_action;
1da177e4 LT	450	}
1da177e4 LT	451
4b61d3e8 PL	452	static void tcf_pedit_stats_update(struct tc_action *a, u64 bytes, u64 packets,
4b61d3e8 PL	453	u64 drops, u64 lastuse, bool hw)
d4d9d9c5 PM	454	{
	455	struct tcf_pedit *d = to_pedit(a);
	456	struct tcf_t *tm = &d->tcf_tm;
	457
4b61d3e8	458	tcf_action_update_stats(a, bytes, packets, drops, hw);
d4d9d9c5 PM	459	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
	460	}
	461
e9ce1cd3 DM	462	static int tcf_pedit_dump(struct sk_buff skb, struct tc_action a,
e9ce1cd3 DM	463	int bind, int ref)
1da177e4	464	{
27a884dc	465	unsigned char *b = skb_tail_pointer(skb);
a85a970a	466	struct tcf_pedit *p = to_pedit(a);
52cf89f7	467	struct tcf_pedit_parms *parms;
1da177e4	468	struct tc_pedit *opt;
1da177e4	469	struct tcf_t t;
10297b99 YH	470	int s;
10297b99 YH	471
52cf89f7 PT	472	spin_lock_bh(&p->tcf_lock);
	473	parms = rcu_dereference_protected(p->parms, 1);
	474	s = struct_size(opt, keys, parms->tcfp_nkeys);
1da177e4	475
0da974f4	476	opt = kzalloc(s, GFP_ATOMIC);
52cf89f7 PT	477	if (unlikely(!opt)) {
52cf89f7 PT	478	spin_unlock_bh(&p->tcf_lock);
1da177e4	479	return -ENOBUFS;
52cf89f7	480	}
1da177e4	481
52cf89f7 PT	482	memcpy(opt->keys, parms->tcfp_keys,
52cf89f7 PT	483	flex_array_size(opt, keys, parms->tcfp_nkeys));
e9ce1cd3	484	opt->index = p->tcf_index;
52cf89f7 PT	485	opt->nkeys = parms->tcfp_nkeys;
52cf89f7 PT	486	opt->flags = parms->tcfp_flags;
e9ce1cd3	487	opt->action = p->tcf_action;
036bb443 VB	488	opt->refcnt = refcount_read(&p->tcf_refcnt) - ref;
036bb443 VB	489	opt->bindcnt = atomic_read(&p->tcf_bindcnt) - bind;
1da177e4	490
52cf89f7 PT	491	if (parms->tcfp_keys_ex) {
	492	if (tcf_pedit_key_ex_dump(skb, parms->tcfp_keys_ex,
	493	parms->tcfp_nkeys))
85eb9af1	494	goto nla_put_failure;
71d0ed70 AV	495
	496	if (nla_put(skb, TCA_PEDIT_PARMS_EX, s, opt))
	497	goto nla_put_failure;
	498	} else {
	499	if (nla_put(skb, TCA_PEDIT_PARMS, s, opt))
	500	goto nla_put_failure;
	501	}
48d8ee16 JHS	502
48d8ee16 JHS	503	tcf_tm_dump(&t, &p->tcf_tm);
9854518e	504	if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD))
1b34ec43	505	goto nla_put_failure;
67b0c1a3	506	spin_unlock_bh(&p->tcf_lock);
48d8ee16	507
541673c8	508	kfree(opt);
1da177e4 LT	509	return skb->len;
1da177e4 LT	510
7ba699c6	511	nla_put_failure:
67b0c1a3	512	spin_unlock_bh(&p->tcf_lock);
dc5fc579	513	nlmsg_trim(skb, b);
541673c8	514	kfree(opt);
1da177e4 LT	515	return -1;
	516	}
	517
c54e1d92	518	static int tcf_pedit_offload_act_setup(struct tc_action act, void entry_data,
c2ccf84e IS	519	u32 *index_inc, bool bind,
c2ccf84e IS	520	struct netlink_ext_ack *extack)
c54e1d92 BZ	521	{
	522	if (bind) {
	523	struct flow_action_entry *entry = entry_data;
	524	int k;
	525
	526	for (k = 0; k < tcf_pedit_nkeys(act); k++) {
	527	switch (tcf_pedit_cmd(act, k)) {
	528	case TCA_PEDIT_KEY_EX_CMD_SET:
	529	entry->id = FLOW_ACTION_MANGLE;
	530	break;
	531	case TCA_PEDIT_KEY_EX_CMD_ADD:
	532	entry->id = FLOW_ACTION_ADD;
	533	break;
	534	default:
bf3b99e4	535	NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
c54e1d92 BZ	536	return -EOPNOTSUPP;
	537	}
	538	entry->mangle.htype = tcf_pedit_htype(act, k);
	539	entry->mangle.mask = tcf_pedit_mask(act, k);
	540	entry->mangle.val = tcf_pedit_val(act, k);
	541	entry->mangle.offset = tcf_pedit_offset(act, k);
	542	entry->hw_stats = tc_act_hw_stats(act->hw_stats);
	543	entry++;
	544	}
	545	*index_inc = k;
	546	} else {
3320f36f OS	547	struct flow_offload_action *fl_action = entry_data;
	548	u32 cmd = tcf_pedit_cmd(act, 0);
	549	int k;
	550
	551	switch (cmd) {
	552	case TCA_PEDIT_KEY_EX_CMD_SET:
	553	fl_action->id = FLOW_ACTION_MANGLE;
	554	break;
	555	case TCA_PEDIT_KEY_EX_CMD_ADD:
	556	fl_action->id = FLOW_ACTION_ADD;
	557	break;
	558	default:
	559	NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
	560	return -EOPNOTSUPP;
	561	}
	562
	563	for (k = 1; k < tcf_pedit_nkeys(act); k++) {
	564	if (cmd != tcf_pedit_cmd(act, k)) {
	565	NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
	566	return -EOPNOTSUPP;
	567	}
	568	}
c54e1d92 BZ	569	}
	570
	571	return 0;
	572	}
	573
e9ce1cd3	574	static struct tc_action_ops act_pedit_ops = {
1da177e4	575	.kind = "pedit",
eddd2cf1	576	.id = TCA_ID_PEDIT,
1da177e4	577	.owner = THIS_MODULE,
6a2b401c	578	.act = tcf_pedit_act,
d4d9d9c5	579	.stats_update = tcf_pedit_stats_update,
1da177e4 LT	580	.dump = tcf_pedit_dump,
1da177e4 LT	581	.cleanup = tcf_pedit_cleanup,
1da177e4	582	.init = tcf_pedit_init,
c54e1d92	583	.offload_act_setup = tcf_pedit_offload_act_setup,
a85a970a	584	.size = sizeof(struct tcf_pedit),
ddf97ccd WC	585	};
	586
	587	static __net_init int pedit_init_net(struct net *net)
	588	{
acd0a7ab	589	struct tc_action_net *tn = net_generic(net, act_pedit_ops.net_id);
ddf97ccd	590
981471bd	591	return tc_action_net_init(net, tn, &act_pedit_ops);
ddf97ccd WC	592	}
ddf97ccd WC	593
039af9c6	594	static void __net_exit pedit_exit_net(struct list_head *net_list)
ddf97ccd	595	{
acd0a7ab	596	tc_action_net_exit(net_list, act_pedit_ops.net_id);
ddf97ccd WC	597	}
	598
	599	static struct pernet_operations pedit_net_ops = {
	600	.init = pedit_init_net,
039af9c6	601	.exit_batch = pedit_exit_net,
acd0a7ab	602	.id = &act_pedit_ops.net_id,
ddf97ccd	603	.size = sizeof(struct tc_action_net),
1da177e4 LT	604	};
	605
	606	MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
	607	MODULE_DESCRIPTION("Generic Packet Editor actions");
	608	MODULE_LICENSE("GPL");
	609
e9ce1cd3	610	static int __init pedit_init_module(void)
1da177e4	611	{
ddf97ccd	612	return tcf_register_action(&act_pedit_ops, &pedit_net_ops);
1da177e4 LT	613	}
1da177e4 LT	614
e9ce1cd3	615	static void __exit pedit_cleanup_module(void)
1da177e4	616	{
ddf97ccd	617	tcf_unregister_action(&act_pedit_ops, &pedit_net_ops);
1da177e4 LT	618	}
	619
	620	module_init(pedit_init_module);
	621	module_exit(pedit_cleanup_module);