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_FMT_DEC_DIV_16(name, field) \ 104 static ssize_t ieee80211_if_fmt_##name( \ 105 const struct ieee80211_sub_if_data *sdata, \ 106 char *buf, int buflen) \ 107 { \ 108 return scnprintf(buf, buflen, "%d\n", sdata->field / 16); \ 109 } 110 111 #define __IEEE80211_IF_FILE(name, _write) \ 112 static ssize_t ieee80211_if_read_##name(struct file *file, \ 113 char __user *userbuf, \ 114 size_t count, loff_t *ppos) \ 115 { \ 116 return ieee80211_if_read(file->private_data, \ 117 userbuf, count, ppos, \ 118 ieee80211_if_fmt_##name); \ 119 } \ 120 static const struct file_operations name##_ops = { \ 121 .read = ieee80211_if_read_##name, \ 122 .write = (_write), \ 123 .open = mac80211_open_file_generic, \ 124 .llseek = generic_file_llseek, \ 125 } 126 127 #define __IEEE80211_IF_FILE_W(name) \ 128 static ssize_t ieee80211_if_write_##name(struct file *file, \ 129 const char __user *userbuf, \ 130 size_t count, loff_t *ppos) \ 131 { \ 132 return ieee80211_if_write(file->private_data, userbuf, count, \ 133 ppos, ieee80211_if_parse_##name); \ 134 } \ 135 __IEEE80211_IF_FILE(name, ieee80211_if_write_##name) 136 137 138 #define IEEE80211_IF_FILE(name, field, format) \ 139 IEEE80211_IF_FMT_##format(name, field) \ 140 __IEEE80211_IF_FILE(name, NULL) 141 142 /* common attributes */ 143 IEEE80211_IF_FILE(drop_unencrypted, drop_unencrypted, DEC); 144 IEEE80211_IF_FILE(rc_rateidx_mask_2ghz, rc_rateidx_mask[IEEE80211_BAND_2GHZ], 145 HEX); 146 IEEE80211_IF_FILE(rc_rateidx_mask_5ghz, rc_rateidx_mask[IEEE80211_BAND_5GHZ], 147 HEX); 148 149 /* STA attributes */ 150 IEEE80211_IF_FILE(bssid, u.mgd.bssid, MAC); 151 IEEE80211_IF_FILE(aid, u.mgd.aid, DEC); 152 IEEE80211_IF_FILE(last_beacon, u.mgd.last_beacon_signal, DEC); 153 IEEE80211_IF_FILE(ave_beacon, u.mgd.ave_beacon_signal, DEC_DIV_16); 154 155 static int ieee80211_set_smps(struct ieee80211_sub_if_data *sdata, 156 enum ieee80211_smps_mode smps_mode) 157 { 158 struct ieee80211_local *local = sdata->local; 159 int err; 160 161 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_STATIC_SMPS) && 162 smps_mode == IEEE80211_SMPS_STATIC) 163 return -EINVAL; 164 165 /* auto should be dynamic if in PS mode */ 166 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS) && 167 (smps_mode == IEEE80211_SMPS_DYNAMIC || 168 smps_mode == IEEE80211_SMPS_AUTOMATIC)) 169 return -EINVAL; 170 171 /* supported only on managed interfaces for now */ 172 if (sdata->vif.type != NL80211_IFTYPE_STATION) 173 return -EOPNOTSUPP; 174 175 mutex_lock(&local->iflist_mtx); 176 err = __ieee80211_request_smps(sdata, smps_mode); 177 mutex_unlock(&local->iflist_mtx); 178 179 return err; 180 } 181 182 static const char *smps_modes[IEEE80211_SMPS_NUM_MODES] = { 183 [IEEE80211_SMPS_AUTOMATIC] = "auto", 184 [IEEE80211_SMPS_OFF] = "off", 185 [IEEE80211_SMPS_STATIC] = "static", 186 [IEEE80211_SMPS_DYNAMIC] = "dynamic", 187 }; 188 189 static ssize_t ieee80211_if_fmt_smps(const struct ieee80211_sub_if_data *sdata, 190 char *buf, int buflen) 191 { 192 if (sdata->vif.type != NL80211_IFTYPE_STATION) 193 return -EOPNOTSUPP; 194 195 return snprintf(buf, buflen, "request: %s\nused: %s\n", 196 smps_modes[sdata->u.mgd.req_smps], 197 smps_modes[sdata->u.mgd.ap_smps]); 198 } 199 200 static ssize_t ieee80211_if_parse_smps(struct ieee80211_sub_if_data *sdata, 201 const char *buf, int buflen) 202 { 203 enum ieee80211_smps_mode mode; 204 205 for (mode = 0; mode < IEEE80211_SMPS_NUM_MODES; mode++) { 206 if (strncmp(buf, smps_modes[mode], buflen) == 0) { 207 int err = ieee80211_set_smps(sdata, mode); 208 if (!err) 209 return buflen; 210 return err; 211 } 212 } 213 214 return -EINVAL; 215 } 216 217 __IEEE80211_IF_FILE_W(smps); 218 219 /* AP attributes */ 220 IEEE80211_IF_FILE(num_sta_ps, u.ap.num_sta_ps, ATOMIC); 221 IEEE80211_IF_FILE(dtim_count, u.ap.dtim_count, DEC); 222 223 static ssize_t ieee80211_if_fmt_num_buffered_multicast( 224 const struct ieee80211_sub_if_data *sdata, char *buf, int buflen) 225 { 226 return scnprintf(buf, buflen, "%u\n", 227 skb_queue_len(&sdata->u.ap.ps_bc_buf)); 228 } 229 __IEEE80211_IF_FILE(num_buffered_multicast, NULL); 230 231 /* WDS attributes */ 232 IEEE80211_IF_FILE(peer, u.wds.remote_addr, MAC); 233 234 #ifdef CONFIG_MAC80211_MESH 235 /* Mesh stats attributes */ 236 IEEE80211_IF_FILE(fwded_mcast, u.mesh.mshstats.fwded_mcast, DEC); 237 IEEE80211_IF_FILE(fwded_unicast, u.mesh.mshstats.fwded_unicast, DEC); 238 IEEE80211_IF_FILE(fwded_frames, u.mesh.mshstats.fwded_frames, DEC); 239 IEEE80211_IF_FILE(dropped_frames_ttl, u.mesh.mshstats.dropped_frames_ttl, DEC); 240 IEEE80211_IF_FILE(dropped_frames_no_route, 241 u.mesh.mshstats.dropped_frames_no_route, DEC); 242 IEEE80211_IF_FILE(estab_plinks, u.mesh.mshstats.estab_plinks, ATOMIC); 243 244 /* Mesh parameters */ 245 IEEE80211_IF_FILE(dot11MeshMaxRetries, 246 u.mesh.mshcfg.dot11MeshMaxRetries, DEC); 247 IEEE80211_IF_FILE(dot11MeshRetryTimeout, 248 u.mesh.mshcfg.dot11MeshRetryTimeout, DEC); 249 IEEE80211_IF_FILE(dot11MeshConfirmTimeout, 250 u.mesh.mshcfg.dot11MeshConfirmTimeout, DEC); 251 IEEE80211_IF_FILE(dot11MeshHoldingTimeout, 252 u.mesh.mshcfg.dot11MeshHoldingTimeout, DEC); 253 IEEE80211_IF_FILE(dot11MeshTTL, u.mesh.mshcfg.dot11MeshTTL, DEC); 254 IEEE80211_IF_FILE(auto_open_plinks, u.mesh.mshcfg.auto_open_plinks, DEC); 255 IEEE80211_IF_FILE(dot11MeshMaxPeerLinks, 256 u.mesh.mshcfg.dot11MeshMaxPeerLinks, DEC); 257 IEEE80211_IF_FILE(dot11MeshHWMPactivePathTimeout, 258 u.mesh.mshcfg.dot11MeshHWMPactivePathTimeout, DEC); 259 IEEE80211_IF_FILE(dot11MeshHWMPpreqMinInterval, 260 u.mesh.mshcfg.dot11MeshHWMPpreqMinInterval, DEC); 261 IEEE80211_IF_FILE(dot11MeshHWMPnetDiameterTraversalTime, 262 u.mesh.mshcfg.dot11MeshHWMPnetDiameterTraversalTime, DEC); 263 IEEE80211_IF_FILE(dot11MeshHWMPmaxPREQretries, 264 u.mesh.mshcfg.dot11MeshHWMPmaxPREQretries, DEC); 265 IEEE80211_IF_FILE(path_refresh_time, 266 u.mesh.mshcfg.path_refresh_time, DEC); 267 IEEE80211_IF_FILE(min_discovery_timeout, 268 u.mesh.mshcfg.min_discovery_timeout, DEC); 269 IEEE80211_IF_FILE(dot11MeshHWMPRootMode, 270 u.mesh.mshcfg.dot11MeshHWMPRootMode, DEC); 271 #endif 272 273 274 #define DEBUGFS_ADD(name) \ 275 debugfs_create_file(#name, 0400, sdata->debugfs.dir, \ 276 sdata, &name##_ops); 277 278 #define DEBUGFS_ADD_MODE(name, mode) \ 279 debugfs_create_file(#name, mode, sdata->debugfs.dir, \ 280 sdata, &name##_ops); 281 282 static void add_sta_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(bssid); 289 DEBUGFS_ADD(aid); 290 DEBUGFS_ADD(last_beacon); 291 DEBUGFS_ADD(ave_beacon); 292 DEBUGFS_ADD_MODE(smps, 0600); 293 } 294 295 static void add_ap_files(struct ieee80211_sub_if_data *sdata) 296 { 297 DEBUGFS_ADD(drop_unencrypted); 298 DEBUGFS_ADD(rc_rateidx_mask_2ghz); 299 DEBUGFS_ADD(rc_rateidx_mask_5ghz); 300 301 DEBUGFS_ADD(num_sta_ps); 302 DEBUGFS_ADD(dtim_count); 303 DEBUGFS_ADD(num_buffered_multicast); 304 } 305 306 static void add_wds_files(struct ieee80211_sub_if_data *sdata) 307 { 308 DEBUGFS_ADD(drop_unencrypted); 309 DEBUGFS_ADD(rc_rateidx_mask_2ghz); 310 DEBUGFS_ADD(rc_rateidx_mask_5ghz); 311 312 DEBUGFS_ADD(peer); 313 } 314 315 static void add_vlan_files(struct ieee80211_sub_if_data *sdata) 316 { 317 DEBUGFS_ADD(drop_unencrypted); 318 DEBUGFS_ADD(rc_rateidx_mask_2ghz); 319 DEBUGFS_ADD(rc_rateidx_mask_5ghz); 320 } 321 322 static void add_monitor_files(struct ieee80211_sub_if_data *sdata) 323 { 324 } 325 326 #ifdef CONFIG_MAC80211_MESH 327 328 static void add_mesh_stats(struct ieee80211_sub_if_data *sdata) 329 { 330 struct dentry *dir = debugfs_create_dir("mesh_stats", 331 sdata->debugfs.dir); 332 333 #define MESHSTATS_ADD(name)\ 334 debugfs_create_file(#name, 0400, dir, sdata, &name##_ops); 335 336 MESHSTATS_ADD(fwded_mcast); 337 MESHSTATS_ADD(fwded_unicast); 338 MESHSTATS_ADD(fwded_frames); 339 MESHSTATS_ADD(dropped_frames_ttl); 340 MESHSTATS_ADD(dropped_frames_no_route); 341 MESHSTATS_ADD(estab_plinks); 342 #undef MESHSTATS_ADD 343 } 344 345 static void add_mesh_config(struct ieee80211_sub_if_data *sdata) 346 { 347 struct dentry *dir = debugfs_create_dir("mesh_config", 348 sdata->debugfs.dir); 349 350 #define MESHPARAMS_ADD(name) \ 351 debugfs_create_file(#name, 0600, dir, sdata, &name##_ops); 352 353 MESHPARAMS_ADD(dot11MeshMaxRetries); 354 MESHPARAMS_ADD(dot11MeshRetryTimeout); 355 MESHPARAMS_ADD(dot11MeshConfirmTimeout); 356 MESHPARAMS_ADD(dot11MeshHoldingTimeout); 357 MESHPARAMS_ADD(dot11MeshTTL); 358 MESHPARAMS_ADD(auto_open_plinks); 359 MESHPARAMS_ADD(dot11MeshMaxPeerLinks); 360 MESHPARAMS_ADD(dot11MeshHWMPactivePathTimeout); 361 MESHPARAMS_ADD(dot11MeshHWMPpreqMinInterval); 362 MESHPARAMS_ADD(dot11MeshHWMPnetDiameterTraversalTime); 363 MESHPARAMS_ADD(dot11MeshHWMPmaxPREQretries); 364 MESHPARAMS_ADD(path_refresh_time); 365 MESHPARAMS_ADD(min_discovery_timeout); 366 367 #undef MESHPARAMS_ADD 368 } 369 #endif 370 371 static void add_files(struct ieee80211_sub_if_data *sdata) 372 { 373 if (!sdata->debugfs.dir) 374 return; 375 376 switch (sdata->vif.type) { 377 case NL80211_IFTYPE_MESH_POINT: 378 #ifdef CONFIG_MAC80211_MESH 379 add_mesh_stats(sdata); 380 add_mesh_config(sdata); 381 #endif 382 break; 383 case NL80211_IFTYPE_STATION: 384 add_sta_files(sdata); 385 break; 386 case NL80211_IFTYPE_ADHOC: 387 /* XXX */ 388 break; 389 case NL80211_IFTYPE_AP: 390 add_ap_files(sdata); 391 break; 392 case NL80211_IFTYPE_WDS: 393 add_wds_files(sdata); 394 break; 395 case NL80211_IFTYPE_MONITOR: 396 add_monitor_files(sdata); 397 break; 398 case NL80211_IFTYPE_AP_VLAN: 399 add_vlan_files(sdata); 400 break; 401 default: 402 break; 403 } 404 } 405 406 void ieee80211_debugfs_add_netdev(struct ieee80211_sub_if_data *sdata) 407 { 408 char buf[10+IFNAMSIZ]; 409 410 sprintf(buf, "netdev:%s", sdata->name); 411 sdata->debugfs.dir = debugfs_create_dir(buf, 412 sdata->local->hw.wiphy->debugfsdir); 413 if (sdata->debugfs.dir) 414 sdata->debugfs.subdir_stations = debugfs_create_dir("stations", 415 sdata->debugfs.dir); 416 add_files(sdata); 417 } 418 419 void ieee80211_debugfs_remove_netdev(struct ieee80211_sub_if_data *sdata) 420 { 421 if (!sdata->debugfs.dir) 422 return; 423 424 debugfs_remove_recursive(sdata->debugfs.dir); 425 sdata->debugfs.dir = NULL; 426 } 427 428 void ieee80211_debugfs_rename_netdev(struct ieee80211_sub_if_data *sdata) 429 { 430 struct dentry *dir; 431 char buf[10 + IFNAMSIZ]; 432 433 dir = sdata->debugfs.dir; 434 435 if (!dir) 436 return; 437 438 sprintf(buf, "netdev:%s", sdata->name); 439 if (!debugfs_rename(dir->d_parent, dir, dir->d_parent, buf)) 440 printk(KERN_ERR "mac80211: debugfs: failed to rename debugfs " 441 "dir to %s\n", buf); 442 } 443