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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/slab.h> |
17 | #include <linux/notifier.h> |
18 | #include <net/mac80211.h> |
19 | #include <net/cfg80211.h> |
20 | #include "ieee80211_i.h" |
21 | #include "rate.h" |
22 | #include "debugfs.h" |
23 | #include "debugfs_netdev.h" |
24 | |
25 | static ssize_t ieee80211_if_read( |
26 | struct ieee80211_sub_if_data *sdata, |
27 | char __user *userbuf, |
28 | size_t count, loff_t *ppos, |
29 | ssize_t (*format)(const struct ieee80211_sub_if_data *, char *, int)) |
30 | { |
31 | char buf[70]; |
32 | ssize_t ret = -EINVAL; |
33 | |
34 | read_lock(&dev_base_lock); |
35 | if (sdata->dev->reg_state == NETREG_REGISTERED) |
36 | ret = (*format)(sdata, buf, sizeof(buf)); |
37 | read_unlock(&dev_base_lock); |
38 | |
39 | if (ret != -EINVAL) |
40 | ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret); |
41 | |
42 | return ret; |
43 | } |
44 | |
45 | static ssize_t ieee80211_if_write( |
46 | struct ieee80211_sub_if_data *sdata, |
47 | const char __user *userbuf, |
48 | size_t count, loff_t *ppos, |
49 | ssize_t (*write)(struct ieee80211_sub_if_data *, const char *, int)) |
50 | { |
51 | u8 *buf; |
52 | ssize_t ret; |
53 | |
54 | buf = kmalloc(count, GFP_KERNEL); |
55 | if (!buf) |
56 | return -ENOMEM; |
57 | |
58 | ret = -EFAULT; |
59 | if (copy_from_user(buf, userbuf, count)) |
60 | goto freebuf; |
61 | |
62 | ret = -ENODEV; |
63 | rtnl_lock(); |
64 | if (sdata->dev->reg_state == NETREG_REGISTERED) |
65 | ret = (*write)(sdata, buf, count); |
66 | rtnl_unlock(); |
67 | |
68 | freebuf: |
69 | kfree(buf); |
70 | return ret; |
71 | } |
72 | |
73 | #define IEEE80211_IF_FMT(name, field, format_string) \ |
74 | static ssize_t ieee80211_if_fmt_##name( \ |
75 | const struct ieee80211_sub_if_data *sdata, char *buf, \ |
76 | int buflen) \ |
77 | { \ |
78 | return scnprintf(buf, buflen, format_string, sdata->field); \ |
79 | } |
80 | #define IEEE80211_IF_FMT_DEC(name, field) \ |
81 | IEEE80211_IF_FMT(name, field, "%d\n") |
82 | #define IEEE80211_IF_FMT_HEX(name, field) \ |
83 | IEEE80211_IF_FMT(name, field, "%#x\n") |
84 | #define IEEE80211_IF_FMT_SIZE(name, field) \ |
85 | IEEE80211_IF_FMT(name, field, "%zd\n") |
86 | |
87 | #define IEEE80211_IF_FMT_ATOMIC(name, field) \ |
88 | static ssize_t ieee80211_if_fmt_##name( \ |
89 | const struct ieee80211_sub_if_data *sdata, \ |
90 | char *buf, int buflen) \ |
91 | { \ |
92 | return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\ |
93 | } |
94 | |
95 | #define IEEE80211_IF_FMT_MAC(name, field) \ |
96 | static ssize_t ieee80211_if_fmt_##name( \ |
97 | const struct ieee80211_sub_if_data *sdata, char *buf, \ |
98 | int buflen) \ |
99 | { \ |
100 | return scnprintf(buf, buflen, "%pM\n", sdata->field); \ |
101 | } |
102 | |
103 | #define __IEEE80211_IF_FILE(name, _write) \ |
104 | static ssize_t ieee80211_if_read_##name(struct file *file, \ |
105 | char __user *userbuf, \ |
106 | size_t count, loff_t *ppos) \ |
107 | { \ |
108 | return ieee80211_if_read(file->private_data, \ |
109 | userbuf, count, ppos, \ |
110 | ieee80211_if_fmt_##name); \ |
111 | } \ |
112 | static const struct file_operations name##_ops = { \ |
113 | .read = ieee80211_if_read_##name, \ |
114 | .write = (_write), \ |
115 | .open = mac80211_open_file_generic, \ |
116 | } |
117 | |
118 | #define __IEEE80211_IF_FILE_W(name) \ |
119 | static ssize_t ieee80211_if_write_##name(struct file *file, \ |
120 | const char __user *userbuf, \ |
121 | size_t count, loff_t *ppos) \ |
122 | { \ |
123 | return ieee80211_if_write(file->private_data, userbuf, count, \ |
124 | ppos, ieee80211_if_parse_##name); \ |
125 | } \ |
126 | __IEEE80211_IF_FILE(name, ieee80211_if_write_##name) |
127 | |
128 | |
129 | #define IEEE80211_IF_FILE(name, field, format) \ |
130 | IEEE80211_IF_FMT_##format(name, field) \ |
131 | __IEEE80211_IF_FILE(name, NULL) |
132 | |
133 | /* common attributes */ |
134 | IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC); |
135 | IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ], |
136 | HEX); |
137 | IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ], |
138 | HEX); |
139 | |
140 | /* STA attributes */ |
141 | IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC); |
142 | IEEE80211_IF_FILE(aid, u.mgd.aid, DEC); |
143 | |
144 | static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata, |
145 | enum ieee80211_smps_mode smps_mode) |
146 | { |
147 | struct ieee80211_local *local = sdata->local; |
148 | int err; |
149 | |
150 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) && |
151 | smps_mode == IEEE80211_SMPS_STATIC) |
152 | return -EINVAL; |
153 | |
154 | /* auto should be dynamic if in PS mode */ |
155 | if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) && |
156 | (smps_mode == IEEE80211_SMPS_DYNAMIC || |
157 | smps_mode == IEEE80211_SMPS_AUTOMATIC)) |
158 | return -EINVAL; |
159 | |
160 | /* supported only on managed interfaces for now */ |
161 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
162 | return -EOPNOTSUPP; |
163 | |
164 | mutex_lock(&local->iflist_mtx); |
165 | err = __ieee80211_request_smps(sdata, smps_mode); |
166 | mutex_unlock(&local->iflist_mtx); |
167 | |
168 | return err; |
169 | } |
170 | |
171 | static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = { |
172 | [IEEE80211_SMPS_AUTOMATIC] = "auto", |
173 | [IEEE80211_SMPS_OFF] = "off", |
174 | [IEEE80211_SMPS_STATIC] = "static", |
175 | [IEEE80211_SMPS_DYNAMIC] = "dynamic", |
176 | }; |
177 | |
178 | static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata, |
179 | char *buf, int buflen) |
180 | { |
181 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
182 | return -EOPNOTSUPP; |
183 | |
184 | return snprintf(buf, buflen, "request: %s\nused: %s\n", |
185 | smps_modes[sdata->u.mgd.req_smps], |
186 | smps_modes[sdata->u.mgd.ap_smps]); |
187 | } |
188 | |
189 | static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata, |
190 | const char *buf, int buflen) |
191 | { |
192 | enum ieee80211_smps_mode mode; |
193 | |
194 | for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) { |
195 | if (strncmp(buf, smps_modes[mode], buflen) == 0) { |
196 | int err = ieee80211_set_smps(sdata, mode); |
197 | if (!err) |
198 | return buflen; |
199 | return err; |
200 | } |
201 | } |
202 | |
203 | return -EINVAL; |
204 | } |
205 | |
206 | __IEEE80211_IF_FILE_W(smps); |
207 | |
208 | /* AP attributes */ |
209 | IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC); |
210 | IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC); |
211 | |
212 | static ssize_t ieee80211_if_fmt_num_buffered_multicast( |
213 | const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) |
214 | { |
215 | return scnprintf(buf, buflen, "%u\n", |
216 | skb_queue_len(&sdata->u.ap.ps_bc_buf)); |
217 | } |
218 | __IEEE80211_IF_FILE(num_buffered_multicast, NULL); |
219 | |
220 | /* WDS attributes */ |
221 | IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC); |
222 | |
223 | #ifdef CONFIG_MAC80211_MESH |
224 | /* Mesh stats attributes */ |
225 | IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC); |
226 | IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC); |
227 | IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC); |
228 | IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC); |
229 | IEEE80211_IF_FILE(dropped_frames_no_route, |
230 | u.mesh.mshstats.dropped_frames_no_route, DEC); |
231 | IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC); |
232 | |
233 | /* Mesh parameters */ |
234 | IEEE80211_IF_FILE(dot11MeshMaxRetries, |
235 | u.mesh.mshcfg.dot11MeshMaxRetries, DEC); |
236 | IEEE80211_IF_FILE(dot11MeshRetryTimeout, |
237 | u.mesh.mshcfg.dot11MeshRetryTimeout, DEC); |
238 | IEEE80211_IF_FILE(dot11MeshConfirmTimeout, |
239 | u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC); |
240 | IEEE80211_IF_FILE(dot11MeshHoldingTimeout, |
241 | u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC); |
242 | IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC); |
243 | IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC); |
244 | IEEE80211_IF_FILE(dot11MeshMaxPeerLinks, |
245 | u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC); |
246 | IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout, |
247 | u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC); |
248 | IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval, |
249 | u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC); |
250 | IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime, |
251 | u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC); |
252 | IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries, |
253 | u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC); |
254 | IEEE80211_IF_FILE(path_refresh_time, |
255 | u.mesh.mshcfg.path_refresh_time, DEC); |
256 | IEEE80211_IF_FILE(min_discovery_timeout, |
257 | u.mesh.mshcfg.min_discovery_timeout, DEC); |
258 | IEEE80211_IF_FILE(dot11MeshHWMPRootMode, |
259 | u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC); |
260 | #endif |
261 | |
262 | |
263 | #define DEBUGFS_ADD(name) \ |
264 | debugfs_create_file(#name, 0400, sdata->debugfs.dir, \ |
265 | sdata, &name##_ops); |
266 | |
267 | #define DEBUGFS_ADD_MODE(name, mode) \ |
268 | debugfs_create_file(#name, mode, sdata->debugfs.dir, \ |
269 | sdata, &name##_ops); |
270 | |
271 | static void add_sta_files(struct ieee80211_sub_if_data *sdata) |
272 | { |
273 | DEBUGFS_ADD(drop_unencrypted); |
274 | DEBUGFS_ADD(rc_rateidx_mask_2ghz); |
275 | DEBUGFS_ADD(rc_rateidx_mask_5ghz); |
276 | |
277 | DEBUGFS_ADD(bssid); |
278 | DEBUGFS_ADD(aid); |
279 | DEBUGFS_ADD_MODE(smps, 0600); |
280 | } |
281 | |
282 | static void add_ap_files(struct ieee80211_sub_if_data *sdata) |
283 | { |
284 | DEBUGFS_ADD(drop_unencrypted); |
285 | DEBUGFS_ADD(rc_rateidx_mask_2ghz); |
286 | DEBUGFS_ADD(rc_rateidx_mask_5ghz); |
287 | |
288 | DEBUGFS_ADD(num_sta_ps); |
289 | DEBUGFS_ADD(dtim_count); |
290 | DEBUGFS_ADD(num_buffered_multicast); |
291 | } |
292 | |
293 | static void add_wds_files(struct ieee80211_sub_if_data *sdata) |
294 | { |
295 | DEBUGFS_ADD(drop_unencrypted); |
296 | DEBUGFS_ADD(rc_rateidx_mask_2ghz); |
297 | DEBUGFS_ADD(rc_rateidx_mask_5ghz); |
298 | |
299 | DEBUGFS_ADD(peer); |
300 | } |
301 | |
302 | static void add_vlan_files(struct ieee80211_sub_if_data *sdata) |
303 | { |
304 | DEBUGFS_ADD(drop_unencrypted); |
305 | DEBUGFS_ADD(rc_rateidx_mask_2ghz); |
306 | DEBUGFS_ADD(rc_rateidx_mask_5ghz); |
307 | } |
308 | |
309 | static void add_monitor_files(struct ieee80211_sub_if_data *sdata) |
310 | { |
311 | } |
312 | |
313 | #ifdef CONFIG_MAC80211_MESH |
314 | |
315 | static void add_mesh_stats(struct ieee80211_sub_if_data *sdata) |
316 | { |
317 | struct dentry *dir = debugfs_create_dir("mesh_stats", |
318 | sdata->debugfs.dir); |
319 | |
320 | #define MESHSTATS_ADD(name)\ |
321 | debugfs_create_file(#name, 0400, dir, sdata, &name##_ops); |
322 | |
323 | MESHSTATS_ADD(fwded_mcast); |
324 | MESHSTATS_ADD(fwded_unicast); |
325 | MESHSTATS_ADD(fwded_frames); |
326 | MESHSTATS_ADD(dropped_frames_ttl); |
327 | MESHSTATS_ADD(dropped_frames_no_route); |
328 | MESHSTATS_ADD(estab_plinks); |
329 | #undef MESHSTATS_ADD |
330 | } |
331 | |
332 | static void add_mesh_config(struct ieee80211_sub_if_data *sdata) |
333 | { |
334 | struct dentry *dir = debugfs_create_dir("mesh_config", |
335 | sdata->debugfs.dir); |
336 | |
337 | #define MESHPARAMS_ADD(name) \ |
338 | debugfs_create_file(#name, 0600, dir, sdata, &name##_ops); |
339 | |
340 | MESHPARAMS_ADD(dot11MeshMaxRetries); |
341 | MESHPARAMS_ADD(dot11MeshRetryTimeout); |
342 | MESHPARAMS_ADD(dot11MeshConfirmTimeout); |
343 | MESHPARAMS_ADD(dot11MeshHoldingTimeout); |
344 | MESHPARAMS_ADD(dot11MeshTTL); |
345 | MESHPARAMS_ADD(auto_open_plinks); |
346 | MESHPARAMS_ADD(dot11MeshMaxPeerLinks); |
347 | MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout); |
348 | MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval); |
349 | MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime); |
350 | MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries); |
351 | MESHPARAMS_ADD(path_refresh_time); |
352 | MESHPARAMS_ADD(min_discovery_timeout); |
353 | |
354 | #undef MESHPARAMS_ADD |
355 | } |
356 | #endif |
357 | |
358 | static void add_files(struct ieee80211_sub_if_data *sdata) |
359 | { |
360 | if (!sdata->debugfs.dir) |
361 | return; |
362 | |
363 | switch (sdata->vif.type) { |
364 | case NL80211_IFTYPE_MESH_POINT: |
365 | #ifdef CONFIG_MAC80211_MESH |
366 | add_mesh_stats(sdata); |
367 | add_mesh_config(sdata); |
368 | #endif |
369 | break; |
370 | case NL80211_IFTYPE_STATION: |
371 | add_sta_files(sdata); |
372 | break; |
373 | case NL80211_IFTYPE_ADHOC: |
374 | /* XXX */ |
375 | break; |
376 | case NL80211_IFTYPE_AP: |
377 | add_ap_files(sdata); |
378 | break; |
379 | case NL80211_IFTYPE_WDS: |
380 | add_wds_files(sdata); |
381 | break; |
382 | case NL80211_IFTYPE_MONITOR: |
383 | add_monitor_files(sdata); |
384 | break; |
385 | case NL80211_IFTYPE_AP_VLAN: |
386 | add_vlan_files(sdata); |
387 | break; |
388 | default: |
389 | break; |
390 | } |
391 | } |
392 | |
393 | void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata) |
394 | { |
395 | char buf[10+IFNAMSIZ]; |
396 | |
397 | sprintf(buf, "netdev:%s", sdata->name); |
398 | sdata->debugfs.dir = debugfs_create_dir(buf, |
399 | sdata->local->hw.wiphy->debugfsdir); |
400 | add_files(sdata); |
401 | } |
402 | |
403 | void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata) |
404 | { |
405 | if (!sdata->debugfs.dir) |
406 | return; |
407 | |
408 | debugfs_remove_recursive(sdata->debugfs.dir); |
409 | sdata->debugfs.dir = NULL; |
410 | } |
411 | |
412 | void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata) |
413 | { |
414 | struct dentry *dir; |
415 | char buf[10 + IFNAMSIZ]; |
416 | |
417 | dir = sdata->debugfs.dir; |
418 | |
419 | if (!dir) |
420 | return; |
421 | |
422 | sprintf(buf, "netdev:%s", sdata->name); |
423 | if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf)) |
424 | printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs " |
425 | "dir to %s\n", buf); |
426 | } |
427 |
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