2 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
3 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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.
10 #include <linux/kernel.h>
11 #include <linux/device.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"
22 #include "debugfs_netdev.h"
24 static ssize_t ieee80211_if_read(
25 struct ieee80211_sub_if_data *sdata,
27 size_t count, loff_t *ppos,
28 ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int))
31 ssize_t ret = -EINVAL;
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);
38 read_unlock(&dev_base_lock);
42 #define IEEE80211_IF_FMT(name, field, format_string) \
43 static ssize_t ieee80211_if_fmt_##name( \
44 const struct ieee80211_sub_if_data *sdata, char *buf, \
47 return scnprintf(buf, buflen, format_string, sdata->field); \
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")
56 #define IEEE80211_IF_FMT_ATOMIC(name, field) \
57 static ssize_t ieee80211_if_fmt_##name( \
58 const struct ieee80211_sub_if_data *sdata, \
59 char *buf, int buflen) \
61 return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
64 #define IEEE80211_IF_FMT_MAC(name, field) \
65 static ssize_t ieee80211_if_fmt_##name( \
66 const struct ieee80211_sub_if_data *sdata, char *buf, \
69 return scnprintf(buf, buflen, MAC_FMT "\n", MAC_ARG(sdata->field));\
72 #define __IEEE80211_IF_FILE(name) \
73 static ssize_t ieee80211_if_read_##name(struct file *file, \
74 char __user *userbuf, \
75 size_t count, loff_t *ppos) \
77 return ieee80211_if_read(file->private_data, \
78 userbuf, count, ppos, \
79 ieee80211_if_fmt_##name); \
81 static const struct file_operations name##_ops = { \
82 .read = ieee80211_if_read_##name, \
83 .open = mac80211_open_file_generic, \
86 #define IEEE80211_IF_FILE(name, field, format) \
87 IEEE80211_IF_FMT_##format(name, field) \
88 __IEEE80211_IF_FILE(name)
90 /* common attributes */
91 IEEE80211_IF_FILE(channel_use, channel_use, DEC);
92 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
93 IEEE80211_IF_FILE(eapol, eapol, DEC);
94 IEEE80211_IF_FILE(ieee8021_x, ieee802_1x, DEC);
96 /* STA/IBSS attributes */
97 IEEE80211_IF_FILE(state, u.sta.state, DEC);
98 IEEE80211_IF_FILE(bssid, u.sta.bssid, MAC);
99 IEEE80211_IF_FILE(prev_bssid, u.sta.prev_bssid, MAC);
100 IEEE80211_IF_FILE(ssid_len, u.sta.ssid_len, SIZE);
101 IEEE80211_IF_FILE(aid, u.sta.aid, DEC);
102 IEEE80211_IF_FILE(ap_capab, u.sta.ap_capab, HEX);
103 IEEE80211_IF_FILE(capab, u.sta.capab, HEX);
104 IEEE80211_IF_FILE(extra_ie_len, u.sta.extra_ie_len, SIZE);
105 IEEE80211_IF_FILE(auth_tries, u.sta.auth_tries, DEC);
106 IEEE80211_IF_FILE(assoc_tries, u.sta.assoc_tries, DEC);
107 IEEE80211_IF_FILE(auth_algs, u.sta.auth_algs, HEX);
108 IEEE80211_IF_FILE(auth_alg, u.sta.auth_alg, DEC);
109 IEEE80211_IF_FILE(auth_transaction, u.sta.auth_transaction, DEC);
111 static ssize_t ieee80211_if_fmt_flags(
112 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
114 return scnprintf(buf, buflen, "%s%s%s%s%s%s%s\n",
115 sdata->u.sta.flags & IEEE80211_STA_SSID_SET ? "SSID\n" : "",
116 sdata->u.sta.flags & IEEE80211_STA_BSSID_SET ? "BSSID\n" : "",
117 sdata->u.sta.flags & IEEE80211_STA_PREV_BSSID_SET ? "prev BSSID\n" : "",
118 sdata->u.sta.flags & IEEE80211_STA_AUTHENTICATED ? "AUTH\n" : "",
119 sdata->u.sta.flags & IEEE80211_STA_ASSOCIATED ? "ASSOC\n" : "",
120 sdata->u.sta.flags & IEEE80211_STA_PROBEREQ_POLL ? "PROBEREQ POLL\n" : "",
121 sdata->flags & IEEE80211_SDATA_USE_PROTECTION ? "CTS prot\n" : "");
123 __IEEE80211_IF_FILE(flags);
126 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
127 IEEE80211_IF_FILE(dtim_period, u.ap.dtim_period, DEC);
128 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
129 IEEE80211_IF_FILE(num_beacons, u.ap.num_beacons, DEC);
130 IEEE80211_IF_FILE(force_unicast_rateidx, u.ap.force_unicast_rateidx, DEC);
131 IEEE80211_IF_FILE(max_ratectrl_rateidx, u.ap.max_ratectrl_rateidx, DEC);
133 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
134 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
136 return scnprintf(buf, buflen, "%u\n",
137 skb_queue_len(&sdata->u.ap.ps_bc_buf));
139 __IEEE80211_IF_FILE(num_buffered_multicast);
141 static ssize_t ieee80211_if_fmt_beacon_head_len(
142 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
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");
149 __IEEE80211_IF_FILE(beacon_head_len);
151 static ssize_t ieee80211_if_fmt_beacon_tail_len(
152 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
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");
159 __IEEE80211_IF_FILE(beacon_tail_len);
162 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
164 /* VLAN attributes */
165 IEEE80211_IF_FILE(vlan_id, u.vlan.id, DEC);
167 /* MONITOR attributes */
168 static ssize_t ieee80211_if_fmt_mode(
169 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
171 struct ieee80211_local *local = sdata->local;
173 return scnprintf(buf, buflen, "%s\n",
174 ((local->hw.flags & IEEE80211_HW_MONITOR_DURING_OPER) ||
175 local->open_count == local->monitors) ?
178 __IEEE80211_IF_FILE(mode);
181 #define DEBUGFS_ADD(name, type)\
182 sdata->debugfs.type.name = debugfs_create_file(#name, 0444,\
183 sdata->debugfsdir, sdata, &name##_ops);
185 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
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);
207 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
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);
224 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
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);
233 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
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);
242 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
244 DEBUGFS_ADD(mode, monitor);
247 static void add_files(struct ieee80211_sub_if_data *sdata)
249 if (!sdata->debugfsdir)
252 switch (sdata->type) {
253 case IEEE80211_IF_TYPE_STA:
254 case IEEE80211_IF_TYPE_IBSS:
255 add_sta_files(sdata);
257 case IEEE80211_IF_TYPE_AP:
260 case IEEE80211_IF_TYPE_WDS:
261 add_wds_files(sdata);
263 case IEEE80211_IF_TYPE_MNTR:
264 add_monitor_files(sdata);
266 case IEEE80211_IF_TYPE_VLAN:
267 add_vlan_files(sdata);
274 #define DEBUGFS_DEL(name, type) \
276 debugfs_remove(sdata->debugfs.type.name); \
277 sdata->debugfs.type.name = NULL; \
280 static void del_sta_files(struct ieee80211_sub_if_data *sdata)
282 DEBUGFS_DEL(channel_use, sta);
283 DEBUGFS_DEL(drop_unencrypted, sta);
284 DEBUGFS_DEL(eapol, sta);
285 DEBUGFS_DEL(ieee8021_x, sta);
286 DEBUGFS_DEL(state, sta);
287 DEBUGFS_DEL(bssid, sta);
288 DEBUGFS_DEL(prev_bssid, sta);
289 DEBUGFS_DEL(ssid_len, sta);
290 DEBUGFS_DEL(aid, sta);
291 DEBUGFS_DEL(ap_capab, sta);
292 DEBUGFS_DEL(capab, sta);
293 DEBUGFS_DEL(extra_ie_len, sta);
294 DEBUGFS_DEL(auth_tries, sta);
295 DEBUGFS_DEL(assoc_tries, sta);
296 DEBUGFS_DEL(auth_algs, sta);
297 DEBUGFS_DEL(auth_alg, sta);
298 DEBUGFS_DEL(auth_transaction, sta);
299 DEBUGFS_DEL(flags, sta);
302 static void del_ap_files(struct ieee80211_sub_if_data *sdata)
304 DEBUGFS_DEL(channel_use, ap);
305 DEBUGFS_DEL(drop_unencrypted, ap);
306 DEBUGFS_DEL(eapol, ap);
307 DEBUGFS_DEL(ieee8021_x, ap);
308 DEBUGFS_DEL(num_sta_ps, ap);
309 DEBUGFS_DEL(dtim_period, ap);
310 DEBUGFS_DEL(dtim_count, ap);
311 DEBUGFS_DEL(num_beacons, ap);
312 DEBUGFS_DEL(force_unicast_rateidx, ap);
313 DEBUGFS_DEL(max_ratectrl_rateidx, ap);
314 DEBUGFS_DEL(num_buffered_multicast, ap);
315 DEBUGFS_DEL(beacon_head_len, ap);
316 DEBUGFS_DEL(beacon_tail_len, ap);
319 static void del_wds_files(struct ieee80211_sub_if_data *sdata)
321 DEBUGFS_DEL(channel_use, wds);
322 DEBUGFS_DEL(drop_unencrypted, wds);
323 DEBUGFS_DEL(eapol, wds);
324 DEBUGFS_DEL(ieee8021_x, wds);
325 DEBUGFS_DEL(peer, wds);
328 static void del_vlan_files(struct ieee80211_sub_if_data *sdata)
330 DEBUGFS_DEL(channel_use, vlan);
331 DEBUGFS_DEL(drop_unencrypted, vlan);
332 DEBUGFS_DEL(eapol, vlan);
333 DEBUGFS_DEL(ieee8021_x, vlan);
334 DEBUGFS_DEL(vlan_id, vlan);
337 static void del_monitor_files(struct ieee80211_sub_if_data *sdata)
339 DEBUGFS_DEL(mode, monitor);
342 static void del_files(struct ieee80211_sub_if_data *sdata, int type)
344 if (!sdata->debugfsdir)
348 case IEEE80211_IF_TYPE_STA:
349 case IEEE80211_IF_TYPE_IBSS:
350 del_sta_files(sdata);
352 case IEEE80211_IF_TYPE_AP:
355 case IEEE80211_IF_TYPE_WDS:
356 del_wds_files(sdata);
358 case IEEE80211_IF_TYPE_MNTR:
359 del_monitor_files(sdata);
361 case IEEE80211_IF_TYPE_VLAN:
362 del_vlan_files(sdata);
369 static int notif_registered;
371 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
373 char buf[10+IFNAMSIZ];
375 if (!notif_registered)
378 sprintf(buf, "netdev:%s", sdata->dev->name);
379 sdata->debugfsdir = debugfs_create_dir(buf,
380 sdata->local->hw.wiphy->debugfsdir);
383 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
385 del_files(sdata, sdata->type);
386 debugfs_remove(sdata->debugfsdir);
387 sdata->debugfsdir = NULL;
390 void ieee80211_debugfs_change_if_type(struct ieee80211_sub_if_data *sdata,
393 del_files(sdata, oldtype);
397 static int netdev_notify(struct notifier_block * nb,
401 struct net_device *dev = ndev;
403 struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
404 char buf[10+IFNAMSIZ];
406 if (state != NETDEV_CHANGENAME)
409 if (!dev->ieee80211_ptr || !dev->ieee80211_ptr->wiphy)
412 if (dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid)
415 sprintf(buf, "netdev:%s", dev->name);
416 dir = sdata->debugfsdir;
417 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
418 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
424 static struct notifier_block mac80211_debugfs_netdev_notifier = {
425 .notifier_call = netdev_notify,
428 void ieee80211_debugfs_netdev_init(void)
432 err = register_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
435 "mac80211: failed to install netdev notifier,"
436 " disabling per-netdev debugfs!\n");
438 notif_registered = 1;
441 void ieee80211_debugfs_netdev_exit(void)
443 unregister_netdevice_notifier(&mac80211_debugfs_netdev_notifier);
444 notif_registered = 0;