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