5d9c797635a914cd66de471b7330ad058d5e9c52
[linux-2.6.git] / net / mac80211 / debugfs_netdev.c
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 "rate.h"
21 #include "debugfs.h"
22 #include "debugfs_netdev.h"
23
24 static 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         read_unlock(&dev_base_lock);
37
38         if (ret != -EINVAL)
39                 ret = simple_read_from_buffer(userbuf, count, ppos, buf, ret);
40
41         return ret;
42 }
43
44 #define IEEE80211_IF_FMT(name, field, format_string)                    \
45 static ssize_t ieee80211_if_fmt_##name(                                 \
46         const struct ieee80211_sub_if_data *sdata, char *buf,           \
47         int buflen)                                                     \
48 {                                                                       \
49         return scnprintf(buf, buflen, format_string, sdata->field);     \
50 }
51 #define IEEE80211_IF_FMT_DEC(name, field)                               \
52                 IEEE80211_IF_FMT(name, field, "%d\n")
53 #define IEEE80211_IF_FMT_HEX(name, field)                               \
54                 IEEE80211_IF_FMT(name, field, "%#x\n")
55 #define IEEE80211_IF_FMT_SIZE(name, field)                              \
56                 IEEE80211_IF_FMT(name, field, "%zd\n")
57
58 #define IEEE80211_IF_FMT_ATOMIC(name, field)                            \
59 static ssize_t ieee80211_if_fmt_##name(                                 \
60         const struct ieee80211_sub_if_data *sdata,                      \
61         char *buf, int buflen)                                          \
62 {                                                                       \
63         return scnprintf(buf, buflen, "%d\n", atomic_read(&sdata->field));\
64 }
65
66 #define IEEE80211_IF_FMT_MAC(name, field)                               \
67 static ssize_t ieee80211_if_fmt_##name(                                 \
68         const struct ieee80211_sub_if_data *sdata, char *buf,           \
69         int buflen)                                                     \
70 {                                                                       \
71         return scnprintf(buf, buflen, "%pM\n", sdata->field);           \
72 }
73
74 #define __IEEE80211_IF_FILE(name)                                       \
75 static ssize_t ieee80211_if_read_##name(struct file *file,              \
76                                         char __user *userbuf,           \
77                                         size_t count, loff_t *ppos)     \
78 {                                                                       \
79         return ieee80211_if_read(file->private_data,                    \
80                                  userbuf, count, ppos,                  \
81                                  ieee80211_if_fmt_##name);              \
82 }                                                                       \
83 static const struct file_operations name##_ops = {                      \
84         .read = ieee80211_if_read_##name,                               \
85         .open = mac80211_open_file_generic,                             \
86 }
87
88 #define IEEE80211_IF_FILE(name, field, format)                          \
89                 IEEE80211_IF_FMT_##format(name, field)                  \
90                 __IEEE80211_IF_FILE(name)
91
92 /* common attributes */
93 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC);
94 IEEE80211_IF_FILE(force_unicast_rateidx, force_unicast_rateidx, DEC);
95 IEEE80211_IF_FILE(max_ratectrl_rateidx, max_ratectrl_rateidx, DEC);
96
97 /* STA attributes */
98 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC);
99 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC);
100 IEEE80211_IF_FILE(capab, u.mgd.capab, HEX);
101
102 /* AP attributes */
103 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC);
104 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC);
105
106 static ssize_t ieee80211_if_fmt_num_buffered_multicast(
107         const struct ieee80211_sub_if_data *sdata, char *buf, int buflen)
108 {
109         return scnprintf(buf, buflen, "%u\n",
110                          skb_queue_len(&sdata->u.ap.ps_bc_buf));
111 }
112 __IEEE80211_IF_FILE(num_buffered_multicast);
113
114 /* WDS attributes */
115 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC);
116
117 #ifdef CONFIG_MAC80211_MESH
118 /* Mesh stats attributes */
119 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC);
120 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC);
121 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC);
122 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC);
123 IEEE80211_IF_FILE(dropped_frames_no_route,
124                 u.mesh.mshstats.dropped_frames_no_route, DEC);
125 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC);
126
127 /* Mesh parameters */
128 IEEE80211_IF_FILE(dot11MeshMaxRetries,
129                 u.mesh.mshcfg.dot11MeshMaxRetries, DEC);
130 IEEE80211_IF_FILE(dot11MeshRetryTimeout,
131                 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC);
132 IEEE80211_IF_FILE(dot11MeshConfirmTimeout,
133                 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC);
134 IEEE80211_IF_FILE(dot11MeshHoldingTimeout,
135                 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC);
136 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC);
137 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC);
138 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks,
139                 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC);
140 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout,
141                 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC);
142 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval,
143                 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC);
144 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime,
145                 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC);
146 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries,
147                 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC);
148 IEEE80211_IF_FILE(path_refresh_time,
149                 u.mesh.mshcfg.path_refresh_time, DEC);
150 IEEE80211_IF_FILE(min_discovery_timeout,
151                 u.mesh.mshcfg.min_discovery_timeout, DEC);
152 IEEE80211_IF_FILE(dot11MeshHWMPRootMode,
153                 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC);
154 #endif
155
156
157 #define DEBUGFS_ADD(name, type) \
158         debugfs_create_file(#name, 0400, sdata->debugfs.dir, \
159                             sdata, &name##_ops);
160
161 static void add_sta_files(struct ieee80211_sub_if_data *sdata)
162 {
163         DEBUGFS_ADD(drop_unencrypted, sta);
164         DEBUGFS_ADD(force_unicast_rateidx, sta);
165         DEBUGFS_ADD(max_ratectrl_rateidx, sta);
166
167         DEBUGFS_ADD(bssid, sta);
168         DEBUGFS_ADD(aid, sta);
169         DEBUGFS_ADD(capab, sta);
170 }
171
172 static void add_ap_files(struct ieee80211_sub_if_data *sdata)
173 {
174         DEBUGFS_ADD(drop_unencrypted, ap);
175         DEBUGFS_ADD(force_unicast_rateidx, ap);
176         DEBUGFS_ADD(max_ratectrl_rateidx, ap);
177
178         DEBUGFS_ADD(num_sta_ps, ap);
179         DEBUGFS_ADD(dtim_count, ap);
180         DEBUGFS_ADD(num_buffered_multicast, ap);
181 }
182
183 static void add_wds_files(struct ieee80211_sub_if_data *sdata)
184 {
185         DEBUGFS_ADD(drop_unencrypted, wds);
186         DEBUGFS_ADD(force_unicast_rateidx, wds);
187         DEBUGFS_ADD(max_ratectrl_rateidx, wds);
188
189         DEBUGFS_ADD(peer, wds);
190 }
191
192 static void add_vlan_files(struct ieee80211_sub_if_data *sdata)
193 {
194         DEBUGFS_ADD(drop_unencrypted, vlan);
195         DEBUGFS_ADD(force_unicast_rateidx, vlan);
196         DEBUGFS_ADD(max_ratectrl_rateidx, vlan);
197 }
198
199 static void add_monitor_files(struct ieee80211_sub_if_data *sdata)
200 {
201 }
202
203 #ifdef CONFIG_MAC80211_MESH
204
205 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata)
206 {
207         struct dentry *dir = debugfs_create_dir("mesh_stats",
208                                                 sdata->debugfs.dir);
209
210 #define MESHSTATS_ADD(name)\
211         debugfs_create_file(#name, 0400, dir, sdata, &name##_ops);
212
213         MESHSTATS_ADD(fwded_mcast);
214         MESHSTATS_ADD(fwded_unicast);
215         MESHSTATS_ADD(fwded_frames);
216         MESHSTATS_ADD(dropped_frames_ttl);
217         MESHSTATS_ADD(dropped_frames_no_route);
218         MESHSTATS_ADD(estab_plinks);
219 #undef MESHSTATS_ADD
220 }
221
222 static void add_mesh_config(struct ieee80211_sub_if_data *sdata)
223 {
224         struct dentry *dir = debugfs_create_dir("mesh_config",
225                                                 sdata->debugfs.dir);
226
227 #define MESHPARAMS_ADD(name) \
228         debugfs_create_file(#name, 0600, dir, sdata, &name##_ops);
229
230         MESHPARAMS_ADD(dot11MeshMaxRetries);
231         MESHPARAMS_ADD(dot11MeshRetryTimeout);
232         MESHPARAMS_ADD(dot11MeshConfirmTimeout);
233         MESHPARAMS_ADD(dot11MeshHoldingTimeout);
234         MESHPARAMS_ADD(dot11MeshTTL);
235         MESHPARAMS_ADD(auto_open_plinks);
236         MESHPARAMS_ADD(dot11MeshMaxPeerLinks);
237         MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout);
238         MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval);
239         MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime);
240         MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries);
241         MESHPARAMS_ADD(path_refresh_time);
242         MESHPARAMS_ADD(min_discovery_timeout);
243
244 #undef MESHPARAMS_ADD
245 }
246 #endif
247
248 static void add_files(struct ieee80211_sub_if_data *sdata)
249 {
250         if (!sdata->debugfs.dir)
251                 return;
252
253         switch (sdata->vif.type) {
254         case NL80211_IFTYPE_MESH_POINT:
255 #ifdef CONFIG_MAC80211_MESH
256                 add_mesh_stats(sdata);
257                 add_mesh_config(sdata);
258 #endif
259                 break;
260         case NL80211_IFTYPE_STATION:
261                 add_sta_files(sdata);
262                 break;
263         case NL80211_IFTYPE_ADHOC:
264                 /* XXX */
265                 break;
266         case NL80211_IFTYPE_AP:
267                 add_ap_files(sdata);
268                 break;
269         case NL80211_IFTYPE_WDS:
270                 add_wds_files(sdata);
271                 break;
272         case NL80211_IFTYPE_MONITOR:
273                 add_monitor_files(sdata);
274                 break;
275         case NL80211_IFTYPE_AP_VLAN:
276                 add_vlan_files(sdata);
277                 break;
278         default:
279                 break;
280         }
281 }
282
283 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata)
284 {
285         char buf[10+IFNAMSIZ];
286
287         sprintf(buf, "netdev:%s", sdata->name);
288         sdata->debugfs.dir = debugfs_create_dir(buf,
289                 sdata->local->hw.wiphy->debugfsdir);
290         add_files(sdata);
291 }
292
293 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata)
294 {
295         if (!sdata->debugfs.dir)
296                 return;
297
298         debugfs_remove_recursive(sdata->debugfs.dir);
299         sdata->debugfs.dir = NULL;
300 }
301
302 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata)
303 {
304         struct dentry *dir;
305         char buf[10 + IFNAMSIZ];
306
307         dir = sdata->debugfs.dir;
308
309         if (!dir)
310                 return;
311
312         sprintf(buf, "netdev:%s", sdata->name);
313         if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf))
314                 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs "
315                        "dir to %s\n", buf);
316 }