1/*
2 * Copyright (c) 2006	Jiri Benc <jbenc@suse.cz>
3 * Copyright 2007	Johannes Berg <johannes@sipsolutions.net>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10#include <linux/kernel.h>
11#include <linux/device.h>
12#include <linux/if.h>
13#include <linux/interrupt.h>
14#include <linux/netdevice.h>
15#include <linux/rtnetlink.h>
16#include <linux/notifier.h>
17#include <net/mac80211.h>
18#include <net/cfg80211.h>
19#include "ieee80211_i.h"
20#include "ieee80211_rate.h"
21#include "debugfs.h"
22#include "debugfs_netdev.h"
23
24static ssize_t ieee80211_if_read(
25	struct ieee80211_sub_if_data *sdata,
26	char __user *userbuf,
27	size_t count, loff_t *ppos,
28	ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
29{
30	char buf[70];
31	ssize_t ret = -EINVAL;
32
33	read_lock(&dev_base_lock);
34	if (sdata->dev->reg_state == NETREG_REGISTERED) {
35		ret = (*format)(sdata, buf, sizeof(buf));
36		ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
37	}
38	read_unlock(&dev_base_lock);
39	return ret;
40}
41
42#define IEEE80211_IF_FMT(name, field, format_string)			\
43static ssize_t ieee80211_if_fmt_##name(					\
44	const struct ieee80211_sub_if_data *sdata, char *buf,		\
45	int buflen)							\
46{									\
47	return scnprintf(buf, buflen, format_string, sdata->field);	\
48}
49#define IEEE80211_IF_FMT_DEC(name, field)				\
50		IEEE80211_IF_FMT(name, field, "%d\n")
51#define IEEE80211_IF_FMT_HEX(name, field)				\
52		IEEE80211_IF_FMT(name, field, "%#x\n")
53#define IEEE80211_IF_FMT_SIZE(name, field)				\
54		IEEE80211_IF_FMT(name, field, "%zd\n")
55
56#define IEEE80211_IF_FMT_ATOMIC(name, field)				\
57static ssize_t ieee80211_if_fmt_##name(					\
58	const struct ieee80211_sub_if_data *sdata,			\
59	char *buf, int buflen)						\
60{									\
61	return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
62}
63
64#define IEEE80211_IF_FMT_MAC(name, field)				\
65static ssize_t ieee80211_if_fmt_##name(					\
66	const struct ieee80211_sub_if_data *sdata, char *buf,		\
67	int buflen)							\
68{									\
69	return scnprintf(buf, buflen, MAC_FMT "\n", MAC_ARG(sdata->field));\
70}
71
72#define __IEEE80211_IF_FILE(name)					\
73static ssize_t ieee80211_if_read_##name(struct file *file,		\
74					char __user *userbuf,		\
75					size_t count, loff_t *ppos)	\
76{									\
77	return ieee80211_if_read(file->private_data,			\
78				 userbuf, count, ppos,			\
79				 ieee80211_if_fmt_##name);		\
80}									\
81static const struct file_operations name##_ops = {			\
82	.read = ieee80211_if_read_##name,				\
83	.open = mac80211_open_file_generic,				\
84}
85
86#define IEEE80211_IF_FILE(name, field, format)				\
87		IEEE80211_IF_FMT_##format(name, field)			\
88		__IEEE80211_IF_FILE(name)
89
90/* common attributes */
91IEEE80211_IF_FILE(channel_use, channel_use, DEC);
92IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
93IEEE80211_IF_FILE(eapol, eapol, DEC);
94IEEE80211_IF_FILE(ieee8021_x, ieee802_1x, DEC);
95
96/* STA/IBSS attributes */
97IEEE80211_IF_FILE(state, u.sta.state, DEC);
98IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
99IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
100IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
101IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
102IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
103IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
104IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
105IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
106IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
107IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
108IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
109IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
110
111static ssize_t ieee80211_if_fmt_flags(
112	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
113{
114	return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
115			 sdata->u.sta.ssid_set ? "SSID\n" : "",
116			 sdata->u.sta.bssid_set ? "BSSID\n" : "",
117			 sdata->u.sta.prev_bssid_set ? "prev BSSID\n" : "",
118			 sdata->u.sta.authenticated ? "AUTH\n" : "",
119			 sdata->u.sta.associated ? "ASSOC\n" : "",
120			 sdata->u.sta.probereq_poll ? "PROBEREQ POLL\n" : "",
121			 sdata->u.sta.use_protection ? "CTS prot\n" : "");
122}
123__IEEE80211_IF_FILE(flags);
124
125/* AP attributes */
126IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
127IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
128IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
129IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
130IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
131IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
132
133static ssize_t ieee80211_if_fmt_num_buffered_multicast(
134	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
135{
136	return scnprintf(buf, buflen, "%u\n",
137			 skb_queue_len(&sdata->u.ap.ps_bc_buf));
138}
139__IEEE80211_IF_FILE(num_buffered_multicast);
140
141static ssize_t ieee80211_if_fmt_beacon_head_len(
142	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
143{
144	if (sdata->u.ap.beacon_head)
145		return scnprintf(buf, buflen, "%d\n",
146				 sdata->u.ap.beacon_head_len);
147	return scnprintf(buf, buflen, "\n");
148}
149__IEEE80211_IF_FILE(beacon_head_len);
150
151static ssize_t ieee80211_if_fmt_beacon_tail_len(
152	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
153{
154	if (sdata->u.ap.beacon_tail)
155		return scnprintf(buf, buflen, "%d\n",
156				 sdata->u.ap.beacon_tail_len);
157	return scnprintf(buf, buflen, "\n");
158}
159__IEEE80211_IF_FILE(beacon_tail_len);
160
161/* WDS attributes */
162IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
163
164/* VLAN attributes */
165IEEE80211_IF_FILE(vlan_id, u.vlan.id, DEC);
166
167/* MONITOR attributes */
168static ssize_t ieee80211_if_fmt_mode(
169	const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
170{
171	struct ieee80211_local *local = sdata->local;
172
173	return scnprintf(buf, buflen, "%s\n",
174			 ((local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) ||
175			  local->open_count == local->monitors) ?
176			 "hard" : "soft");
177}
178__IEEE80211_IF_FILE(mode);
179
180
181#define DEBUGFS_ADD(name, type)\
182	sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
183		sdata->debugfsdir, sdata, &name##_ops);
184
185static void add_sta_files(struct ieee80211_sub_if_data *sdata)
186{
187	DEBUGFS_ADD(channel_use, sta);
188	DEBUGFS_ADD(drop_unencrypted, sta);
189	DEBUGFS_ADD(eapol, sta);
190	DEBUGFS_ADD(ieee8021_x, sta);
191	DEBUGFS_ADD(state, sta);
192	DEBUGFS_ADD(bssid, sta);
193	DEBUGFS_ADD(prev_bssid, sta);
194	DEBUGFS_ADD(ssid_len, sta);
195	DEBUGFS_ADD(aid, sta);
196	DEBUGFS_ADD(ap_capab, sta);
197	DEBUGFS_ADD(capab, sta);
198	DEBUGFS_ADD(extra_ie_len, sta);
199	DEBUGFS_ADD(auth_tries, sta);
200	DEBUGFS_ADD(assoc_tries, sta);
201	DEBUGFS_ADD(auth_algs, sta);
202	DEBUGFS_ADD(auth_alg, sta);
203	DEBUGFS_ADD(auth_transaction, sta);
204	DEBUGFS_ADD(flags, sta);
205}
206
207static void add_ap_files(struct ieee80211_sub_if_data *sdata)
208{
209	DEBUGFS_ADD(channel_use, ap);
210	DEBUGFS_ADD(drop_unencrypted, ap);
211	DEBUGFS_ADD(eapol, ap);
212	DEBUGFS_ADD(ieee8021_x, ap);
213	DEBUGFS_ADD(num_sta_ps, ap);
214	DEBUGFS_ADD(dtim_period, ap);
215	DEBUGFS_ADD(dtim_count, ap);
216	DEBUGFS_ADD(num_beacons, ap);
217	DEBUGFS_ADD(force_unicast_rateidx, ap);
218	DEBUGFS_ADD(max_ratectrl_rateidx, ap);
219	DEBUGFS_ADD(num_buffered_multicast, ap);
220	DEBUGFS_ADD(beacon_head_len, ap);
221	DEBUGFS_ADD(beacon_tail_len, ap);
222}
223
224static void add_wds_files(struct ieee80211_sub_if_data *sdata)
225{
226	DEBUGFS_ADD(channel_use, wds);
227	DEBUGFS_ADD(drop_unencrypted, wds);
228	DEBUGFS_ADD(eapol, wds);
229	DEBUGFS_ADD(ieee8021_x, wds);
230	DEBUGFS_ADD(peer, wds);
231}
232
233static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
234{
235	DEBUGFS_ADD(channel_use, vlan);
236	DEBUGFS_ADD(drop_unencrypted, vlan);
237	DEBUGFS_ADD(eapol, vlan);
238	DEBUGFS_ADD(ieee8021_x, vlan);
239	DEBUGFS_ADD(vlan_id, vlan);
240}
241
242static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
243{
244	DEBUGFS_ADD(mode, monitor);
245}
246
247static void add_files(struct ieee80211_sub_if_data *sdata)
248{
249	if (!sdata->debugfsdir)
250		return;
251
252	switch (sdata->type) {
253	case IEEE80211_IF_TYPE_STA:
254	case IEEE80211_IF_TYPE_IBSS:
255		add_sta_files(sdata);
256		break;
257	case IEEE80211_IF_TYPE_AP:
258		add_ap_files(sdata);
259		break;
260	case IEEE80211_IF_TYPE_WDS:
261		add_wds_files(sdata);
262		break;
263	case IEEE80211_IF_TYPE_MNTR:
264		add_monitor_files(sdata);
265		break;
266	case IEEE80211_IF_TYPE_VLAN:
267		add_vlan_files(sdata);
268		break;
269	default:
270		break;
271	}
272}
273
274#define DEBUGFS_DEL(name, type)\
275	debugfs_remove(sdata->debugfs.type.name);\
276	sdata->debugfs.type.name = NULL;
277
278static void del_sta_files(struct ieee80211_sub_if_data *sdata)
279{
280	DEBUGFS_DEL(channel_use, sta);
281	DEBUGFS_DEL(drop_unencrypted, sta);
282	DEBUGFS_DEL(eapol, sta);
283	DEBUGFS_DEL(ieee8021_x, sta);
284	DEBUGFS_DEL(state, sta);
285	DEBUGFS_DEL(bssid, sta);
286	DEBUGFS_DEL(prev_bssid, sta);
287	DEBUGFS_DEL(ssid_len, sta);
288	DEBUGFS_DEL(aid, sta);
289	DEBUGFS_DEL(ap_capab, sta);
290	DEBUGFS_DEL(capab, sta);
291	DEBUGFS_DEL(extra_ie_len, sta);
292	DEBUGFS_DEL(auth_tries, sta);
293	DEBUGFS_DEL(assoc_tries, sta);
294	DEBUGFS_DEL(auth_algs, sta);
295	DEBUGFS_DEL(auth_alg, sta);
296	DEBUGFS_DEL(auth_transaction, sta);
297	DEBUGFS_DEL(flags, sta);
298}
299
300static void del_ap_files(struct ieee80211_sub_if_data *sdata)
301{
302	DEBUGFS_DEL(channel_use, ap);
303	DEBUGFS_DEL(drop_unencrypted, ap);
304	DEBUGFS_DEL(eapol, ap);
305	DEBUGFS_DEL(ieee8021_x, ap);
306	DEBUGFS_DEL(num_sta_ps, ap);
307	DEBUGFS_DEL(dtim_period, ap);
308	DEBUGFS_DEL(dtim_count, ap);
309	DEBUGFS_DEL(num_beacons, ap);
310	DEBUGFS_DEL(force_unicast_rateidx, ap);
311	DEBUGFS_DEL(max_ratectrl_rateidx, ap);
312	DEBUGFS_DEL(num_buffered_multicast, ap);
313	DEBUGFS_DEL(beacon_head_len, ap);
314	DEBUGFS_DEL(beacon_tail_len, ap);
315}
316
317static void del_wds_files(struct ieee80211_sub_if_data *sdata)
318{
319	DEBUGFS_DEL(channel_use, wds);
320	DEBUGFS_DEL(drop_unencrypted, wds);
321	DEBUGFS_DEL(eapol, wds);
322	DEBUGFS_DEL(ieee8021_x, wds);
323	DEBUGFS_DEL(peer, wds);
324}
325
326static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
327{
328	DEBUGFS_DEL(channel_use, vlan);
329	DEBUGFS_DEL(drop_unencrypted, vlan);
330	DEBUGFS_DEL(eapol, vlan);
331	DEBUGFS_DEL(ieee8021_x, vlan);
332	DEBUGFS_DEL(vlan_id, vlan);
333}
334
335static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
336{
337	DEBUGFS_DEL(mode, monitor);
338}
339
340static void del_files(struct ieee80211_sub_if_data *sdata, int type)
341{
342	if (!sdata->debugfsdir)
343		return;
344
345	switch (type) {
346	case IEEE80211_IF_TYPE_STA:
347	case IEEE80211_IF_TYPE_IBSS:
348		del_sta_files(sdata);
349		break;
350	case IEEE80211_IF_TYPE_AP:
351		del_ap_files(sdata);
352		break;
353	case IEEE80211_IF_TYPE_WDS:
354		del_wds_files(sdata);
355		break;
356	case IEEE80211_IF_TYPE_MNTR:
357		del_monitor_files(sdata);
358		break;
359	case IEEE80211_IF_TYPE_VLAN:
360		del_vlan_files(sdata);
361		break;
362	default:
363		break;
364	}
365}
366
367static int notif_registered;
368
369void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
370{
371	char buf[10+IFNAMSIZ];
372
373	if (!notif_registered)
374		return;
375
376	sprintf(buf, "netdev:%s", sdata->dev->name);
377	sdata->debugfsdir = debugfs_create_dir(buf,
378		sdata->local->hw.wiphy->debugfsdir);
379}
380
381void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
382{
383	del_files(sdata, sdata->type);
384	debugfs_remove(sdata->debugfsdir);
385	sdata->debugfsdir = NULL;
386}
387
388void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
389				      int oldtype)
390{
391	del_files(sdata, oldtype);
392	add_files(sdata);
393}
394
395static int netdev_notify(struct notifier_block * nb,
396			 unsigned long state,
397			 void *ndev)
398{
399	struct net_device *dev = ndev;
400	char buf[10+IFNAMSIZ];
401
402	if (state != NETDEV_CHANGENAME)
403		return 0;
404
405	if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
406		return 0;
407
408	if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
409		return 0;
410
411	/* TODO
412	sprintf(buf, "netdev:%s", dev->name);
413	debugfs_rename(IEEE80211_DEV_TO_SUB_IF(dev)->debugfsdir, buf);
414	*/
415
416	return 0;
417}
418
419static struct notifier_block mac80211_debugfs_netdev_notifier = {
420	.notifier_call = netdev_notify,
421};
422
423void ieee80211_debugfs_netdev_init(void)
424{
425	int err;
426
427	err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
428	if (err) {
429		printk(KERN_ERR
430		       "mac80211: failed to install netdev notifier,"
431		       " disabling per-netdev debugfs!\n");
432	} else
433		notif_registered = 1;
434}
435
436void ieee80211_debugfs_netdev_exit(void)
437{
438	unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
439	notif_registered = 0;
440}
441