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[zen-stable.git] / net / mac80211 / debugfs_key.c
blob59edcd95a58dbcec31833568f9d5f8bd8893da09
1 /*
2 * Copyright 2003-2005 Devicescape Software, Inc.
3 * Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
4 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
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 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/kobject.h>
12 #include <linux/slab.h>
13 #include "ieee80211_i.h"
14 #include "key.h"
15 #include "debugfs.h"
16 #include "debugfs_key.h"
17
18 #define KEY_READ(name, prop, format_string) \
19 static ssize_t key_##name##_read(struct file *file, \
20 char __user *userbuf, \
21 size_t count, loff_t *ppos) \
22 { \
23 struct ieee80211_key *key = file->private_data; \
24 return mac80211_format_buffer(userbuf, count, ppos, \
25 format_string, key->prop); \
26 }
27 #define KEY_READ_D(name) KEY_READ(name, name, "%d\n")
28 #define KEY_READ_X(name) KEY_READ(name, name, "0x%x\n")
29
30 #define KEY_OPS(name) \
31 static const struct file_operations key_ ##name## _ops = { \
32 .read = key_##name##_read, \
33 .open = mac80211_open_file_generic, \
34 .llseek = generic_file_llseek, \
35 }
36
37 #define KEY_FILE(name, format) \
38 KEY_READ_##format(name) \
39 KEY_OPS(name)
40
41 #define KEY_CONF_READ(name, format_string) \
42 KEY_READ(conf_##name, conf.name, format_string)
43 #define KEY_CONF_READ_D(name) KEY_CONF_READ(name, "%d\n")
44
45 #define KEY_CONF_OPS(name) \
46 static const struct file_operations key_ ##name## _ops = { \
47 .read = key_conf_##name##_read, \
48 .open = mac80211_open_file_generic, \
49 .llseek = generic_file_llseek, \
50 }
51
52 #define KEY_CONF_FILE(name, format) \
53 KEY_CONF_READ_##format(name) \
54 KEY_CONF_OPS(name)
55
56 KEY_CONF_FILE(keylen, D);
57 KEY_CONF_FILE(keyidx, D);
58 KEY_CONF_FILE(hw_key_idx, D);
59 KEY_FILE(flags, X);
60 KEY_FILE(tx_rx_count, D);
61 KEY_READ(ifindex, sdata->name, "%s\n");
62 KEY_OPS(ifindex);
63
64 static ssize_t key_algorithm_read(struct file *file,
65 char __user *userbuf,
66 size_t count, loff_t *ppos)
67 {
68 char buf[15];
69 struct ieee80211_key *key = file->private_data;
70 u32 c = key->conf.cipher;
71
72 sprintf(buf, "%.2x-%.2x-%.2x:%d\n",
73 c >> 24, (c >> 16) & 0xff, (c >> 8) & 0xff, c & 0xff);
74 return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
75 }
76 KEY_OPS(algorithm);
77
78 static ssize_t key_tx_spec_read(struct file *file, char __user *userbuf,
79 size_t count, loff_t *ppos)
80 {
81 u64 pn;
82 char buf[20];
83 int len;
84 struct ieee80211_key *key = file->private_data;
85
86 switch (key->conf.cipher) {
87 case WLAN_CIPHER_SUITE_WEP40:
88 case WLAN_CIPHER_SUITE_WEP104:
89 len = scnprintf(buf, sizeof(buf), "\n");
90 break;
91 case WLAN_CIPHER_SUITE_TKIP:
92 len = scnprintf(buf, sizeof(buf), "%08x %04x\n",
93 key->u.tkip.tx.iv32,
94 key->u.tkip.tx.iv16);
95 break;
96 case WLAN_CIPHER_SUITE_CCMP:
97 pn = atomic64_read(&key->u.ccmp.tx_pn);
98 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
99 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
100 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
101 break;
102 case WLAN_CIPHER_SUITE_AES_CMAC:
103 pn = atomic64_read(&key->u.aes_cmac.tx_pn);
104 len = scnprintf(buf, sizeof(buf), "%02x%02x%02x%02x%02x%02x\n",
105 (u8)(pn >> 40), (u8)(pn >> 32), (u8)(pn >> 24),
106 (u8)(pn >> 16), (u8)(pn >> 8), (u8)pn);
107 break;
108 default:
109 return 0;
110 }
111 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
112 }
113 KEY_OPS(tx_spec);
114
115 static ssize_t key_rx_spec_read(struct file *file, char __user *userbuf,
116 size_t count, loff_t *ppos)
117 {
118 struct ieee80211_key *key = file->private_data;
119 char buf[14*NUM_RX_DATA_QUEUES+1], *p = buf;
120 int i, len;
121 const u8 *rpn;
122
123 switch (key->conf.cipher) {
124 case WLAN_CIPHER_SUITE_WEP40:
125 case WLAN_CIPHER_SUITE_WEP104:
126 len = scnprintf(buf, sizeof(buf), "\n");
127 break;
128 case WLAN_CIPHER_SUITE_TKIP:
129 for (i = 0; i < NUM_RX_DATA_QUEUES; i++)
130 p += scnprintf(p, sizeof(buf)+buf-p,
131 "%08x %04x\n",
132 key->u.tkip.rx[i].iv32,
133 key->u.tkip.rx[i].iv16);
134 len = p - buf;
135 break;
136 case WLAN_CIPHER_SUITE_CCMP:
137 for (i = 0; i < NUM_RX_DATA_QUEUES + 1; i++) {
138 rpn = key->u.ccmp.rx_pn[i];
139 p += scnprintf(p, sizeof(buf)+buf-p,
140 "%02x%02x%02x%02x%02x%02x\n",
141 rpn[0], rpn[1], rpn[2],
142 rpn[3], rpn[4], rpn[5]);
143 }
144 len = p - buf;
145 break;
146 case WLAN_CIPHER_SUITE_AES_CMAC:
147 rpn = key->u.aes_cmac.rx_pn;
148 p += scnprintf(p, sizeof(buf)+buf-p,
149 "%02x%02x%02x%02x%02x%02x\n",
150 rpn[0], rpn[1], rpn[2],
151 rpn[3], rpn[4], rpn[5]);
152 len = p - buf;
153 break;
154 default:
155 return 0;
156 }
157 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
158 }
159 KEY_OPS(rx_spec);
160
161 static ssize_t key_replays_read(struct file *file, char __user *userbuf,
162 size_t count, loff_t *ppos)
163 {
164 struct ieee80211_key *key = file->private_data;
165 char buf[20];
166 int len;
167
168 switch (key->conf.cipher) {
169 case WLAN_CIPHER_SUITE_CCMP:
170 len = scnprintf(buf, sizeof(buf), "%u\n", key->u.ccmp.replays);
171 break;
172 case WLAN_CIPHER_SUITE_AES_CMAC:
173 len = scnprintf(buf, sizeof(buf), "%u\n",
174 key->u.aes_cmac.replays);
175 break;
176 default:
177 return 0;
178 }
179 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
180 }
181 KEY_OPS(replays);
182
183 static ssize_t key_icverrors_read(struct file *file, char __user *userbuf,
184 size_t count, loff_t *ppos)
185 {
186 struct ieee80211_key *key = file->private_data;
187 char buf[20];
188 int len;
189
190 switch (key->conf.cipher) {
191 case WLAN_CIPHER_SUITE_AES_CMAC:
192 len = scnprintf(buf, sizeof(buf), "%u\n",
193 key->u.aes_cmac.icverrors);
194 break;
195 default:
196 return 0;
197 }
198 return simple_read_from_buffer(userbuf, count, ppos, buf, len);
199 }
200 KEY_OPS(icverrors);
201
202 static ssize_t key_key_read(struct file *file, char __user *userbuf,
203 size_t count, loff_t *ppos)
204 {
205 struct ieee80211_key *key = file->private_data;
206 int i, bufsize = 2 * key->conf.keylen + 2;
207 char *buf = kmalloc(bufsize, GFP_KERNEL);
208 char *p = buf;
209 ssize_t res;
210
211 if (!buf)
212 return -ENOMEM;
213
214 for (i = 0; i < key->conf.keylen; i++)
215 p += scnprintf(p, bufsize + buf - p, "%02x", key->conf.key[i]);
216 p += scnprintf(p, bufsize+buf-p, "\n");
217 res = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
218 kfree(buf);
219 return res;
220 }
221 KEY_OPS(key);
222
223 #define DEBUGFS_ADD(name) \
224 debugfs_create_file(#name, 0400, key->debugfs.dir, \
225 key, &key_##name##_ops);
226
227 void ieee80211_debugfs_key_add(struct ieee80211_key *key)
228 {
229 static int keycount;
230 char buf[100];
231 struct sta_info *sta;
232
233 if (!key->local->debugfs.keys)
234 return;
235
236 sprintf(buf, "%d", keycount);
237 key->debugfs.cnt = keycount;
238 keycount++;
239 key->debugfs.dir = debugfs_create_dir(buf,
240 key->local->debugfs.keys);
241
242 if (!key->debugfs.dir)
243 return;
244
245 sta = key->sta;
246 if (sta) {
247 sprintf(buf, "../../netdev:%s/stations/%pM",
248 sta->sdata->name, sta->sta.addr);
249 key->debugfs.stalink =
250 debugfs_create_symlink("station", key->debugfs.dir, buf);
251 }
252
253 DEBUGFS_ADD(keylen);
254 DEBUGFS_ADD(flags);
255 DEBUGFS_ADD(keyidx);
256 DEBUGFS_ADD(hw_key_idx);
257 DEBUGFS_ADD(tx_rx_count);
258 DEBUGFS_ADD(algorithm);
259 DEBUGFS_ADD(tx_spec);
260 DEBUGFS_ADD(rx_spec);
261 DEBUGFS_ADD(replays);
262 DEBUGFS_ADD(icverrors);
263 DEBUGFS_ADD(key);
264 DEBUGFS_ADD(ifindex);
265 };
266
267 void ieee80211_debugfs_key_remove(struct ieee80211_key *key)
268 {
269 if (!key)
270 return;
271
272 debugfs_remove_recursive(key->debugfs.dir);
273 key->debugfs.dir = NULL;
274 }
275
276 void ieee80211_debugfs_key_update_default(struct ieee80211_sub_if_data *sdata)
277 {
278 char buf[50];
279 struct ieee80211_key *key;
280
281 if (!sdata->debugfs.dir)
282 return;
283
284 lockdep_assert_held(&sdata->local->key_mtx);
285
286 if (sdata->default_unicast_key) {
287 key = key_mtx_dereference(sdata->local,
288 sdata->default_unicast_key);
289 sprintf(buf, "../keys/%d", key->debugfs.cnt);
290 sdata->debugfs.default_unicast_key =
291 debugfs_create_symlink("default_unicast_key",
292 sdata->debugfs.dir, buf);
293 } else {
294 debugfs_remove(sdata->debugfs.default_unicast_key);
295 sdata->debugfs.default_unicast_key = NULL;
296 }
297
298 if (sdata->default_multicast_key) {
299 key = key_mtx_dereference(sdata->local,
300 sdata->default_multicast_key);
301 sprintf(buf, "../keys/%d", key->debugfs.cnt);
302 sdata->debugfs.default_multicast_key =
303 debugfs_create_symlink("default_multicast_key",
304 sdata->debugfs.dir, buf);
305 } else {
306 debugfs_remove(sdata->debugfs.default_multicast_key);
307 sdata->debugfs.default_multicast_key = NULL;
308 }
309 }
310
311 void ieee80211_debugfs_key_add_mgmt_default(struct ieee80211_sub_if_data *sdata)
312 {
313 char buf[50];
314 struct ieee80211_key *key;
315
316 if (!sdata->debugfs.dir)
317 return;
318
319 key = key_mtx_dereference(sdata->local,
320 sdata->default_mgmt_key);
321 if (key) {
322 sprintf(buf, "../keys/%d", key->debugfs.cnt);
323 sdata->debugfs.default_mgmt_key =
324 debugfs_create_symlink("default_mgmt_key",
325 sdata->debugfs.dir, buf);
326 } else
327 ieee80211_debugfs_key_remove_mgmt_default(sdata);
328 }
329
330 void ieee80211_debugfs_key_remove_mgmt_default(struct ieee80211_sub_if_data *sdata)
331 {
332 if (!sdata)
333 return;
334
335 debugfs_remove(sdata->debugfs.default_mgmt_key);
336 sdata->debugfs.default_mgmt_key = NULL;
337 }
338
339 void ieee80211_debugfs_key_sta_del(struct ieee80211_key *key,
340 struct sta_info *sta)
341 {
342 debugfs_remove(key->debugfs.stalink);
343 key->debugfs.stalink = NULL;
344 }