[mirror_ubuntu-jammy-kernel.git] / net / ieee802154 / netlink.c

/*
 * Netlink inteface for IEEE 802.15.4 stack
 *
 * Copyright 2007, 2008 Siemens AG
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Written by:
 * Sergey Lapin <slapin@ossfans.org>
 * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
 * Maxim Osipov <maxim.osipov@siemens.com>
 */

#include <linux/kernel.h>
#include <net/genetlink.h>
#include <linux/nl802154.h>

#include "ieee802154.h"

static unsigned int ieee802154_seq_num;
static DEFINE_SPINLOCK(ieee802154_seq_lock);

struct genl_family nl802154_family = {
	.id		= GENL_ID_GENERATE,
	.hdrsize	= 0,
	.name		= IEEE802154_NL_NAME,
	.version	= 1,
	.maxattr	= IEEE802154_ATTR_MAX,
};

/* Requests to userspace */
struct sk_buff *ieee802154_nl_create(int flags, u8 req)
{
	void *hdr;
	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
	unsigned long f;

	if (!msg)
		return NULL;

	spin_lock_irqsave(&ieee802154_seq_lock, f);
	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
			&nl802154_family, flags, req);
	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
	if (!hdr) {
		nlmsg_free(msg);
		return NULL;
	}

	return msg;
}

int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
{
	/* XXX: nlh is right at the start of msg */
	void *hdr = genlmsg_data(NLMSG_DATA(msg->data));

	if (genlmsg_end(msg, hdr) < 0)
		goto out;

	return genlmsg_multicast(msg, 0, group, GFP_ATOMIC);
out:
	nlmsg_free(msg);
	return -ENOBUFS;
}

int __init ieee802154_nl_init(void)
{
	int rc;

	rc = genl_register_family(&nl802154_family);
	if (rc)
		goto fail;

	rc = nl802154_mac_register();
	if (rc)
		goto fail;

	rc = nl802154_phy_register();
	if (rc)
		goto fail;

	return 0;

fail:
	genl_unregister_family(&nl802154_family);
	return rc;
}

void __exit ieee802154_nl_exit(void)
{
	genl_unregister_family(&nl802154_family);
}
Commit	Line	Data
2c21d115 SL	1	/*
	2	* Netlink inteface for IEEE 802.15.4 stack
	3	*
	4	* Copyright 2007, 2008 Siemens AG
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*
	19	* Written by:
	20	* Sergey Lapin <slapin@ossfans.org>
	21	* Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
8e753dd0	22	* Maxim Osipov <maxim.osipov@siemens.com>
2c21d115 SL	23	*/
	24
	25	#include <linux/kernel.h>
2c21d115 SL	26	#include <net/genetlink.h>
2c21d115 SL	27	#include <linux/nl802154.h>
78fe738d DB	28
78fe738d DB	29	#include "ieee802154.h"
2c21d115 SL	30
2c21d115 SL	31	static unsigned int ieee802154_seq_num;
c4835d81	32	static DEFINE_SPINLOCK(ieee802154_seq_lock);
2c21d115	33
78fe738d	34	struct genl_family nl802154_family = {
2c21d115 SL	35	.id = GENL_ID_GENERATE,
	36	.hdrsize = 0,
	37	.name = IEEE802154_NL_NAME,
	38	.version = 1,
	39	.maxattr = IEEE802154_ATTR_MAX,
	40	};
	41
2c21d115	42	/* Requests to userspace */
78fe738d	43	struct sk_buff *ieee802154_nl_create(int flags, u8 req)
2c21d115 SL	44	{
	45	void *hdr;
	46	struct sk_buff *msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
c4835d81	47	unsigned long f;
2c21d115 SL	48
	49	if (!msg)
	50	return NULL;
	51
c4835d81	52	spin_lock_irqsave(&ieee802154_seq_lock, f);
2c21d115	53	hdr = genlmsg_put(msg, 0, ieee802154_seq_num++,
78fe738d	54	&nl802154_family, flags, req);
c4835d81	55	spin_unlock_irqrestore(&ieee802154_seq_lock, f);
2c21d115 SL	56	if (!hdr) {
	57	nlmsg_free(msg);
	58	return NULL;
	59	}
	60
	61	return msg;
	62	}
	63
78fe738d	64	int ieee802154_nl_mcast(struct sk_buff *msg, unsigned int group)
2c21d115 SL	65	{
	66	/* XXX: nlh is right at the start of msg */
	67	void *hdr = genlmsg_data(NLMSG_DATA(msg->data));
	68
8e753dd0	69	if (genlmsg_end(msg, hdr) < 0)
2c21d115 SL	70	goto out;
2c21d115 SL	71
78fe738d	72	return genlmsg_multicast(msg, 0, group, GFP_ATOMIC);
2c21d115 SL	73	out:
	74	nlmsg_free(msg);
	75	return -ENOBUFS;
	76	}
	77
cb6b3763	78	int __init ieee802154_nl_init(void)
2c21d115 SL	79	{
2c21d115 SL	80	int rc;
2c21d115	81
78fe738d	82	rc = genl_register_family(&nl802154_family);
2c21d115 SL	83	if (rc)
	84	goto fail;
	85
78fe738d	86	rc = nl802154_mac_register();
2c21d115 SL	87	if (rc)
	88	goto fail;
	89
1eaa9d03 DB	90	rc = nl802154_phy_register();
	91	if (rc)
	92	goto fail;
	93
2c21d115 SL	94	return 0;
	95
	96	fail:
78fe738d	97	genl_unregister_family(&nl802154_family);
2c21d115 SL	98	return rc;
2c21d115 SL	99	}
2c21d115	100
cb6b3763	101	void __exit ieee802154_nl_exit(void)
2c21d115	102	{
78fe738d	103	genl_unregister_family(&nl802154_family);
2c21d115	104	}
dfd06fe8	105