[net-next-2.6.git] / net / ieee802154 / nl-phy.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/netlink.h>
#include <net/genetlink.h>
#include <net/wpan-phy.h>
#include <net/af_ieee802154.h>
#include <net/ieee802154_netdev.h>
#include <net/rtnetlink.h> /* for rtnl_{un,}lock */
#include <linux/nl802154.h>

#include "ieee802154.h"

static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 pid,
	u32 seq, int flags, struct wpan_phy *phy)
{
	void *hdr;
	int i, pages = 0;
	uint32_t *buf = kzalloc(32 * sizeof(uint32_t), GFP_KERNEL);

	pr_debug("%s\n", __func__);

	if (!buf)
		goto out;

	hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
		IEEE802154_LIST_PHY);
	if (!hdr)
		goto out;

	mutex_lock(&phy->pib_lock);
	NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy));

	NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, phy->current_page);
	NLA_PUT_U8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel);
	for (i = 0; i < 32; i++) {
		if (phy->channels_supported[i])
			buf[pages++] = phy->channels_supported[i] | (i << 27);
	}
	if (pages)
		NLA_PUT(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST,
				pages * sizeof(uint32_t), buf);

	mutex_unlock(&phy->pib_lock);
	return genlmsg_end(msg, hdr);

nla_put_failure:
	mutex_unlock(&phy->pib_lock);
	genlmsg_cancel(msg, hdr);
out:
	kfree(buf);
	return -EMSGSIZE;
}

static int ieee802154_list_phy(struct sk_buff *skb,
	struct genl_info *info)
{
	/* Request for interface name, index, type, IEEE address,
	   PAN Id, short address */
	struct sk_buff *msg;
	struct wpan_phy *phy;
	const char *name;
	int rc = -ENOBUFS;

	pr_debug("%s\n", __func__);

	if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
		return -EINVAL;

	name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
	if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
		return -EINVAL; /* phy name should be null-terminated */


	phy = wpan_phy_find(name);
	if (!phy)
		return -ENODEV;

	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
	if (!msg)
		goto out_dev;

	rc = ieee802154_nl_fill_phy(msg, info->snd_pid, info->snd_seq,
			0, phy);
	if (rc < 0)
		goto out_free;

	wpan_phy_put(phy);

	return genlmsg_reply(msg, info);
out_free:
	nlmsg_free(msg);
out_dev:
	wpan_phy_put(phy);
	return rc;

}

struct dump_phy_data {
	struct sk_buff *skb;
	struct netlink_callback *cb;
	int idx, s_idx;
};

static int ieee802154_dump_phy_iter(struct wpan_phy *phy, void *_data)
{
	int rc;
	struct dump_phy_data *data = _data;

	pr_debug("%s\n", __func__);

	if (data->idx++ < data->s_idx)
		return 0;

	rc = ieee802154_nl_fill_phy(data->skb,
			NETLINK_CB(data->cb->skb).pid,
			data->cb->nlh->nlmsg_seq,
			NLM_F_MULTI,
			phy);

	if (rc < 0) {
		data->idx--;
		return rc;
	}

	return 0;
}

static int ieee802154_dump_phy(struct sk_buff *skb,
	struct netlink_callback *cb)
{
	struct dump_phy_data data = {
		.cb = cb,
		.skb = skb,
		.s_idx = cb->args[0],
		.idx = 0,
	};

	pr_debug("%s\n", __func__);

	wpan_phy_for_each(ieee802154_dump_phy_iter, &data);

	cb->args[0] = data.idx;

	return skb->len;
}

static int ieee802154_add_iface(struct sk_buff *skb,
		struct genl_info *info)
{
	struct sk_buff *msg;
	struct wpan_phy *phy;
	const char *name;
	const char *devname;
	int rc = -ENOBUFS;
	struct net_device *dev;

	pr_debug("%s\n", __func__);

	if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
		return -EINVAL;

	name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
	if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
		return -EINVAL; /* phy name should be null-terminated */

	if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
		devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
		if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1]
				!= '\0')
			return -EINVAL; /* phy name should be null-terminated */
	} else  {
		devname = "wpan%d";
	}

	if (strlen(devname) >= IFNAMSIZ)
		return -ENAMETOOLONG;

	phy = wpan_phy_find(name);
	if (!phy)
		return -ENODEV;

	msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE);
	if (!msg)
		goto out_dev;

	if (!phy->add_iface) {
		rc = -EINVAL;
		goto nla_put_failure;
	}

	dev = phy->add_iface(phy, devname);
	if (IS_ERR(dev)) {
		rc = PTR_ERR(dev);
		goto nla_put_failure;
	}

	NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy));
	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);

	dev_put(dev);

	wpan_phy_put(phy);

	return ieee802154_nl_reply(msg, info);

nla_put_failure:
	nlmsg_free(msg);
out_dev:
	wpan_phy_put(phy);
	return rc;
}

static int ieee802154_del_iface(struct sk_buff *skb,
		struct genl_info *info)
{
	struct sk_buff *msg;
	struct wpan_phy *phy;
	const char *name;
	int rc;
	struct net_device *dev;

	pr_debug("%s\n", __func__);

	if (!info->attrs[IEEE802154_ATTR_DEV_NAME])
		return -EINVAL;

	name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
	if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0')
		return -EINVAL; /* name should be null-terminated */

	dev = dev_get_by_name(genl_info_net(info), name);
	if (!dev)
		return -ENODEV;

	phy = ieee802154_mlme_ops(dev)->get_phy(dev);
	BUG_ON(!phy);

	rc = -EINVAL;
	/* phy name is optional, but should be checked if it's given */
	if (info->attrs[IEEE802154_ATTR_PHY_NAME]) {
		struct wpan_phy *phy2;

		const char *pname =
			nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
		if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1]
				!= '\0')
			/* name should be null-terminated */
			goto out_dev;

		phy2 = wpan_phy_find(pname);
		if (!phy2)
			goto out_dev;

		if (phy != phy2) {
			wpan_phy_put(phy2);
			goto out_dev;
		}
	}

	rc = -ENOBUFS;

	msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE);
	if (!msg)
		goto out_dev;

	if (!phy->del_iface) {
		rc = -EINVAL;
		goto nla_put_failure;
	}

	rtnl_lock();
	phy->del_iface(phy, dev);

	/* We don't have device anymore */
	dev_put(dev);
	dev = NULL;

	rtnl_unlock();


	NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy));
	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, name);

	wpan_phy_put(phy);

	return ieee802154_nl_reply(msg, info);

nla_put_failure:
	nlmsg_free(msg);
out_dev:
	wpan_phy_put(phy);
	if (dev)
		dev_put(dev);

	return rc;
}

static struct genl_ops ieee802154_phy_ops[] = {
	IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
							ieee802154_dump_phy),
	IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
	IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
};

/*
 * No need to unregister as family unregistration will do it.
 */
int nl802154_phy_register(void)
{
	int i;
	int rc;

	for (i = 0; i < ARRAY_SIZE(ieee802154_phy_ops); i++) {
		rc = genl_register_ops(&nl802154_family,
				&ieee802154_phy_ops[i]);
		if (rc)
			return rc;
	}

	return 0;
}
Commit	Line	Data
1eaa9d03 DES	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>
	22	* Maxim Osipov <maxim.osipov@siemens.com>
	23	*/
	24
	25	#include <linux/kernel.h>
	26	#include <net/netlink.h>
	27	#include <net/genetlink.h>
	28	#include <net/wpan-phy.h>
bb1cafb8 DES	29	#include <net/af_ieee802154.h>
	30	#include <net/ieee802154_netdev.h>
	31	#include <net/rtnetlink.h> /* for rtnl_{un,}lock */
1eaa9d03 DES	32	#include <linux/nl802154.h>
	33
	34	#include "ieee802154.h"
	35
	36	static int ieee802154_nl_fill_phy(struct sk_buff *msg, u32 pid,
	37	u32 seq, int flags, struct wpan_phy *phy)
	38	{
	39	void *hdr;
	40	int i, pages = 0;
	41	uint32_t buf = kzalloc(32 sizeof(uint32_t), GFP_KERNEL);
	42
	43	pr_debug("%s\n", __func__);
	44
	45	if (!buf)
	46	goto out;
	47
	48	hdr = genlmsg_put(msg, 0, seq, &nl802154_family, flags,
	49	IEEE802154_LIST_PHY);
	50	if (!hdr)
	51	goto out;
	52
	53	mutex_lock(&phy->pib_lock);
	54	NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy));
	55
	56	NLA_PUT_U8(msg, IEEE802154_ATTR_PAGE, phy->current_page);
	57	NLA_PUT_U8(msg, IEEE802154_ATTR_CHANNEL, phy->current_channel);
	58	for (i = 0; i < 32; i++) {
	59	if (phy->channels_supported[i])
	60	buf[pages++] = phy->channels_supported[i] \| (i << 27);
	61	}
	62	if (pages)
	63	NLA_PUT(msg, IEEE802154_ATTR_CHANNEL_PAGE_LIST,
	64	pages * sizeof(uint32_t), buf);
	65
	66	mutex_unlock(&phy->pib_lock);
	67	return genlmsg_end(msg, hdr);
	68
	69	nla_put_failure:
	70	mutex_unlock(&phy->pib_lock);
	71	genlmsg_cancel(msg, hdr);
	72	out:
	73	kfree(buf);
	74	return -EMSGSIZE;
	75	}
	76
	77	static int ieee802154_list_phy(struct sk_buff *skb,
	78	struct genl_info *info)
	79	{
	80	/* Request for interface name, index, type, IEEE address,
	81	PAN Id, short address */
	82	struct sk_buff *msg;
	83	struct wpan_phy *phy;
	84	const char *name;
	85	int rc = -ENOBUFS;
	86
	87	pr_debug("%s\n", __func__);
	88
	89	if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
	90	return -EINVAL;
	91
	92	name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
	93	if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
	94	return -EINVAL; /* phy name should be null-terminated */
	95
96
97	phy = wpan_phy_find(name);
98	if (!phy)
99	return -ENODEV;
100
101	msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
102	if (!msg)
103	goto out_dev;
104
105	rc = ieee802154_nl_fill_phy(msg, info->snd_pid, info->snd_seq,
106	0, phy);
107	if (rc < 0)
108	goto out_free;
109
110	wpan_phy_put(phy);
111
112	return genlmsg_reply(msg, info);
113	out_free:
114	nlmsg_free(msg);
115	out_dev:
116	wpan_phy_put(phy);
117	return rc;
118
119	}
120
121	struct dump_phy_data {
122	struct sk_buff *skb;
123	struct netlink_callback *cb;
124	int idx, s_idx;
125	};
126
127	static int ieee802154_dump_phy_iter(struct wpan_phy phy, void _data)
128	{
129	int rc;
130	struct dump_phy_data *data = _data;
131
132	pr_debug("%s\n", __func__);
133
134	if (data->idx++ < data->s_idx)
135	return 0;
136
137	rc = ieee802154_nl_fill_phy(data->skb,
138	NETLINK_CB(data->cb->skb).pid,
139	data->cb->nlh->nlmsg_seq,
140	NLM_F_MULTI,
141	phy);
142
143	if (rc < 0) {
144	data->idx--;
145	return rc;
146	}
147
148	return 0;
149	}
150
151	static int ieee802154_dump_phy(struct sk_buff *skb,
152	struct netlink_callback *cb)
153	{
154	struct dump_phy_data data = {
155	.cb = cb,
156	.skb = skb,
157	.s_idx = cb->args[0],
158	.idx = 0,
159	};
160
161	pr_debug("%s\n", __func__);
162
163	wpan_phy_for_each(ieee802154_dump_phy_iter, &data);
164
165	cb->args[0] = data.idx;
166
167	return skb->len;
168	}
169
bb1cafb8 DES	170	static int ieee802154_add_iface(struct sk_buff *skb,
	171	struct genl_info *info)
	172	{
	173	struct sk_buff *msg;
	174	struct wpan_phy *phy;
	175	const char *name;
	176	const char *devname;
	177	int rc = -ENOBUFS;
	178	struct net_device *dev;
	179
	180	pr_debug("%s\n", __func__);
	181
	182	if (!info->attrs[IEEE802154_ATTR_PHY_NAME])
	183	return -EINVAL;
	184
	185	name = nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
	186	if (name[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1] != '\0')
	187	return -EINVAL; /* phy name should be null-terminated */
	188
	189	if (info->attrs[IEEE802154_ATTR_DEV_NAME]) {
	190	devname = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
	191	if (devname[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1]
	192	!= '\0')
	193	return -EINVAL; /* phy name should be null-terminated */
	194	} else {
	195	devname = "wpan%d";
	196	}
	197
	198	if (strlen(devname) >= IFNAMSIZ)
	199	return -ENAMETOOLONG;
	200
	201	phy = wpan_phy_find(name);
	202	if (!phy)
	203	return -ENODEV;
	204
	205	msg = ieee802154_nl_new_reply(info, 0, IEEE802154_ADD_IFACE);
	206	if (!msg)
	207	goto out_dev;
	208
	209	if (!phy->add_iface) {
	210	rc = -EINVAL;
	211	goto nla_put_failure;
	212	}
	213
	214	dev = phy->add_iface(phy, devname);
	215	if (IS_ERR(dev)) {
	216	rc = PTR_ERR(dev);
	217	goto nla_put_failure;
	218	}
	219
	220	NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy));
	221	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, dev->name);
	222
	223	dev_put(dev);
	224
	225	wpan_phy_put(phy);
	226
	227	return ieee802154_nl_reply(msg, info);
	228
	229	nla_put_failure:
	230	nlmsg_free(msg);
	231	out_dev:
	232	wpan_phy_put(phy);
	233	return rc;
234	}
235
236	static int ieee802154_del_iface(struct sk_buff *skb,
237	struct genl_info *info)
238	{
239	struct sk_buff *msg;
240	struct wpan_phy *phy;
241	const char *name;
242	int rc;
243	struct net_device *dev;
244
245	pr_debug("%s\n", __func__);
246
247	if (!info->attrs[IEEE802154_ATTR_DEV_NAME])
248	return -EINVAL;
249
250	name = nla_data(info->attrs[IEEE802154_ATTR_DEV_NAME]);
251	if (name[nla_len(info->attrs[IEEE802154_ATTR_DEV_NAME]) - 1] != '\0')
252	return -EINVAL; /* name should be null-terminated */
253
254	dev = dev_get_by_name(genl_info_net(info), name);
255	if (!dev)
256	return -ENODEV;
257
258	phy = ieee802154_mlme_ops(dev)->get_phy(dev);
259	BUG_ON(!phy);
260
261	rc = -EINVAL;
262	/* phy name is optional, but should be checked if it's given */
263	if (info->attrs[IEEE802154_ATTR_PHY_NAME]) {
264	struct wpan_phy *phy2;
265
266	const char *pname =
267	nla_data(info->attrs[IEEE802154_ATTR_PHY_NAME]);
268	if (pname[nla_len(info->attrs[IEEE802154_ATTR_PHY_NAME]) - 1]
269	!= '\0')
270	/* name should be null-terminated */
271	goto out_dev;
272
273	phy2 = wpan_phy_find(pname);
274	if (!phy2)
275	goto out_dev;
276
277	if (phy != phy2) {
278	wpan_phy_put(phy2);
279	goto out_dev;
280	}
281	}
282
283	rc = -ENOBUFS;
284
285	msg = ieee802154_nl_new_reply(info, 0, IEEE802154_DEL_IFACE);
286	if (!msg)
287	goto out_dev;
288
289	if (!phy->del_iface) {
290	rc = -EINVAL;
291	goto nla_put_failure;
292	}
293
294	rtnl_lock();
295	phy->del_iface(phy, dev);
296
297	/* We don't have device anymore */
298	dev_put(dev);
299	dev = NULL;
300
301	rtnl_unlock();
302
303
304	NLA_PUT_STRING(msg, IEEE802154_ATTR_PHY_NAME, wpan_phy_name(phy));
305	NLA_PUT_STRING(msg, IEEE802154_ATTR_DEV_NAME, name);
306
307	wpan_phy_put(phy);
308
309	return ieee802154_nl_reply(msg, info);
310
311	nla_put_failure:
312	nlmsg_free(msg);
313	out_dev:
314	wpan_phy_put(phy);
315	if (dev)
316	dev_put(dev);
317
318	return rc;
319	}
320
1eaa9d03 DES	321	static struct genl_ops ieee802154_phy_ops[] = {
	322	IEEE802154_DUMP(IEEE802154_LIST_PHY, ieee802154_list_phy,
	323	ieee802154_dump_phy),
bb1cafb8 DES	324	IEEE802154_OP(IEEE802154_ADD_IFACE, ieee802154_add_iface),
bb1cafb8 DES	325	IEEE802154_OP(IEEE802154_DEL_IFACE, ieee802154_del_iface),
1eaa9d03 DES	326	};
	327
	328	/*
	329	* No need to unregister as family unregistration will do it.
	330	*/
	331	int nl802154_phy_register(void)
	332	{
	333	int i;
	334	int rc;
	335
	336	for (i = 0; i < ARRAY_SIZE(ieee802154_phy_ops); i++) {
	337	rc = genl_register_ops(&nl802154_family,
	338	&ieee802154_phy_ops[i]);
	339	if (rc)
	340	return rc;
	341	}
	342
	343	return 0;
	344	}