| 1 | /* |
| 2 | * Copyright © 2009 Julien Cristau |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 21 | * DEALINGS IN THE SOFTWARE. |
| 22 | * |
| 23 | * Author: Julien Cristau <jcristau@debian.org> |
| 24 | */ |
| 25 | |
| 26 | #ifdef HAVE_DIX_CONFIG_H |
| 27 | #include <dix-config.h> |
| 28 | #endif |
| 29 | |
| 30 | #include <libudev.h> |
| 31 | #include <ctype.h> |
| 32 | |
| 33 | #include "input.h" |
| 34 | #include "inputstr.h" |
| 35 | #include "hotplug.h" |
| 36 | #include "config-backends.h" |
| 37 | #include "os.h" |
| 38 | #include "globals.h" |
| 39 | |
| 40 | #define UDEV_XKB_PROP_KEY "xkb" |
| 41 | |
| 42 | #define LOG_PROPERTY(path, prop, val) \ |
| 43 | LogMessageVerb(X_INFO, 10, \ |
| 44 | "config/udev: getting property %s on %s " \ |
| 45 | "returned \"%s\"\n", \ |
| 46 | (prop), (path), (val) ? (val) : "(null)") |
| 47 | #define LOG_SYSATTR(path, attr, val) \ |
| 48 | LogMessageVerb(X_INFO, 10, \ |
| 49 | "config/udev: getting attribute %s on %s " \ |
| 50 | "returned \"%s\"\n", \ |
| 51 | (attr), (path), (val) ? (val) : "(null)") |
| 52 | |
| 53 | static struct udev_monitor *udev_monitor; |
| 54 | |
| 55 | #ifdef CONFIG_UDEV_KMS |
| 56 | static Bool |
| 57 | config_udev_odev_setup_attribs(const char *path, const char *syspath, |
| 58 | config_odev_probe_proc_ptr probe_callback); |
| 59 | #endif |
| 60 | |
| 61 | static void |
| 62 | device_added(struct udev_device *udev_device) |
| 63 | { |
| 64 | const char *path, *name = NULL; |
| 65 | char *config_info = NULL; |
| 66 | const char *syspath; |
| 67 | const char *tags_prop; |
| 68 | const char *key, *value, *tmp; |
| 69 | InputOption *input_options; |
| 70 | InputAttributes attrs = { }; |
| 71 | DeviceIntPtr dev = NULL; |
| 72 | struct udev_list_entry *set, *entry; |
| 73 | struct udev_device *parent; |
| 74 | int rc; |
| 75 | const char *dev_seat; |
| 76 | |
| 77 | path = udev_device_get_devnode(udev_device); |
| 78 | |
| 79 | syspath = udev_device_get_syspath(udev_device); |
| 80 | |
| 81 | if (!path || !syspath) |
| 82 | return; |
| 83 | |
| 84 | dev_seat = udev_device_get_property_value(udev_device, "ID_SEAT"); |
| 85 | if (!dev_seat) |
| 86 | dev_seat = "seat0"; |
| 87 | |
| 88 | if (SeatId && strcmp(dev_seat, SeatId)) |
| 89 | return; |
| 90 | |
| 91 | if (!SeatId && strcmp(dev_seat, "seat0")) |
| 92 | return; |
| 93 | |
| 94 | #ifdef CONFIG_UDEV_KMS |
| 95 | if (!strcmp(udev_device_get_subsystem(udev_device), "drm")) { |
| 96 | const char *sysname = udev_device_get_sysname(udev_device); |
| 97 | |
| 98 | if (strncmp(sysname, "card", 4) != 0) |
| 99 | return; |
| 100 | |
| 101 | LogMessage(X_INFO, "config/udev: Adding drm device (%s)\n", path); |
| 102 | |
| 103 | config_udev_odev_setup_attribs(path, syspath, NewGPUDeviceRequest); |
| 104 | return; |
| 105 | } |
| 106 | #endif |
| 107 | |
| 108 | if (!udev_device_get_property_value(udev_device, "ID_INPUT")) { |
| 109 | LogMessageVerb(X_INFO, 10, |
| 110 | "config/udev: ignoring device %s without " |
| 111 | "property ID_INPUT set\n", path); |
| 112 | return; |
| 113 | } |
| 114 | |
| 115 | input_options = input_option_new(NULL, "_source", "server/udev"); |
| 116 | if (!input_options) |
| 117 | return; |
| 118 | |
| 119 | parent = udev_device_get_parent(udev_device); |
| 120 | if (parent) { |
| 121 | const char *ppath = udev_device_get_devnode(parent); |
| 122 | const char *product = udev_device_get_property_value(parent, "PRODUCT"); |
| 123 | const char *pnp_id = udev_device_get_sysattr_value(parent, "id"); |
| 124 | unsigned int usb_vendor, usb_model; |
| 125 | |
| 126 | name = udev_device_get_sysattr_value(parent, "name"); |
| 127 | LOG_SYSATTR(ppath, "name", name); |
| 128 | if (!name) { |
| 129 | name = udev_device_get_property_value(parent, "NAME"); |
| 130 | LOG_PROPERTY(ppath, "NAME", name); |
| 131 | } |
| 132 | |
| 133 | /* construct USB ID in lowercase hex - "0000:ffff" */ |
| 134 | if (product && |
| 135 | sscanf(product, "%*x/%4x/%4x/%*x", &usb_vendor, &usb_model) == 2) { |
| 136 | if (asprintf(&attrs.usb_id, "%04x:%04x", usb_vendor, usb_model) |
| 137 | == -1) |
| 138 | attrs.usb_id = NULL; |
| 139 | else |
| 140 | LOG_PROPERTY(ppath, "PRODUCT", product); |
| 141 | } |
| 142 | |
| 143 | while (!pnp_id && (parent = udev_device_get_parent(parent))) { |
| 144 | pnp_id = udev_device_get_sysattr_value(parent, "id"); |
| 145 | if (!pnp_id) |
| 146 | continue; |
| 147 | |
| 148 | attrs.pnp_id = strdup(pnp_id); |
| 149 | ppath = udev_device_get_devnode(parent); |
| 150 | LOG_SYSATTR(ppath, "id", pnp_id); |
| 151 | } |
| 152 | |
| 153 | } |
| 154 | if (!name) |
| 155 | name = "(unnamed)"; |
| 156 | else |
| 157 | attrs.product = strdup(name); |
| 158 | input_options = input_option_new(input_options, "name", name); |
| 159 | input_options = input_option_new(input_options, "path", path); |
| 160 | input_options = input_option_new(input_options, "device", path); |
| 161 | if (path) |
| 162 | attrs.device = strdup(path); |
| 163 | |
| 164 | tags_prop = udev_device_get_property_value(udev_device, "ID_INPUT.tags"); |
| 165 | LOG_PROPERTY(path, "ID_INPUT.tags", tags_prop); |
| 166 | attrs.tags = xstrtokenize(tags_prop, ","); |
| 167 | |
| 168 | if (asprintf(&config_info, "udev:%s", syspath) == -1) { |
| 169 | config_info = NULL; |
| 170 | goto unwind; |
| 171 | } |
| 172 | |
| 173 | if (device_is_duplicate(config_info)) { |
| 174 | LogMessage(X_WARNING, "config/udev: device %s already added. " |
| 175 | "Ignoring.\n", name); |
| 176 | goto unwind; |
| 177 | } |
| 178 | |
| 179 | set = udev_device_get_properties_list_entry(udev_device); |
| 180 | udev_list_entry_foreach(entry, set) { |
| 181 | key = udev_list_entry_get_name(entry); |
| 182 | if (!key) |
| 183 | continue; |
| 184 | value = udev_list_entry_get_value(entry); |
| 185 | if (!strncasecmp(key, UDEV_XKB_PROP_KEY, sizeof(UDEV_XKB_PROP_KEY) - 1)) { |
| 186 | LOG_PROPERTY(path, key, value); |
| 187 | tmp = key + sizeof(UDEV_XKB_PROP_KEY) - 1; |
| 188 | if (!strcasecmp(tmp, "rules")) |
| 189 | input_options = |
| 190 | input_option_new(input_options, "xkb_rules", value); |
| 191 | else if (!strcasecmp(tmp, "layout")) |
| 192 | input_options = |
| 193 | input_option_new(input_options, "xkb_layout", value); |
| 194 | else if (!strcasecmp(tmp, "variant")) |
| 195 | input_options = |
| 196 | input_option_new(input_options, "xkb_variant", value); |
| 197 | else if (!strcasecmp(tmp, "model")) |
| 198 | input_options = |
| 199 | input_option_new(input_options, "xkb_model", value); |
| 200 | else if (!strcasecmp(tmp, "options")) |
| 201 | input_options = |
| 202 | input_option_new(input_options, "xkb_options", value); |
| 203 | } |
| 204 | else if (!strcmp(key, "ID_VENDOR")) { |
| 205 | LOG_PROPERTY(path, key, value); |
| 206 | attrs.vendor = strdup(value); |
| 207 | } |
| 208 | else if (!strcmp(key, "ID_INPUT_KEY")) { |
| 209 | LOG_PROPERTY(path, key, value); |
| 210 | attrs.flags |= ATTR_KEYBOARD; |
| 211 | } |
| 212 | else if (!strcmp(key, "ID_INPUT_MOUSE")) { |
| 213 | LOG_PROPERTY(path, key, value); |
| 214 | attrs.flags |= ATTR_POINTER; |
| 215 | } |
| 216 | else if (!strcmp(key, "ID_INPUT_JOYSTICK")) { |
| 217 | LOG_PROPERTY(path, key, value); |
| 218 | attrs.flags |= ATTR_JOYSTICK; |
| 219 | } |
| 220 | else if (!strcmp(key, "ID_INPUT_TABLET")) { |
| 221 | LOG_PROPERTY(path, key, value); |
| 222 | attrs.flags |= ATTR_TABLET; |
| 223 | } |
| 224 | else if (!strcmp(key, "ID_INPUT_TOUCHPAD")) { |
| 225 | LOG_PROPERTY(path, key, value); |
| 226 | attrs.flags |= ATTR_TOUCHPAD; |
| 227 | } |
| 228 | else if (!strcmp(key, "ID_INPUT_TOUCHSCREEN")) { |
| 229 | LOG_PROPERTY(path, key, value); |
| 230 | attrs.flags |= ATTR_TOUCHSCREEN; |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | input_options = input_option_new(input_options, "config_info", config_info); |
| 235 | |
| 236 | /* Default setting needed for non-seat0 seats */ |
| 237 | if (ServerIsNotSeat0()) |
| 238 | input_options = input_option_new(input_options, "GrabDevice", "on"); |
| 239 | |
| 240 | LogMessage(X_INFO, "config/udev: Adding input device %s (%s)\n", |
| 241 | name, path); |
| 242 | rc = NewInputDeviceRequest(input_options, &attrs, &dev); |
| 243 | if (rc != Success) |
| 244 | goto unwind; |
| 245 | |
| 246 | unwind: |
| 247 | free(config_info); |
| 248 | input_option_free_list(&input_options); |
| 249 | |
| 250 | free(attrs.usb_id); |
| 251 | free(attrs.pnp_id); |
| 252 | free(attrs.product); |
| 253 | free(attrs.device); |
| 254 | free(attrs.vendor); |
| 255 | if (attrs.tags) { |
| 256 | char **tag = attrs.tags; |
| 257 | |
| 258 | while (*tag) { |
| 259 | free(*tag); |
| 260 | tag++; |
| 261 | } |
| 262 | free(attrs.tags); |
| 263 | } |
| 264 | |
| 265 | return; |
| 266 | } |
| 267 | |
| 268 | static void |
| 269 | device_removed(struct udev_device *device) |
| 270 | { |
| 271 | char *value; |
| 272 | const char *syspath = udev_device_get_syspath(device); |
| 273 | |
| 274 | #ifdef CONFIG_UDEV_KMS |
| 275 | if (!strcmp(udev_device_get_subsystem(device), "drm")) { |
| 276 | const char *sysname = udev_device_get_sysname(device); |
| 277 | const char *path = udev_device_get_devnode(device); |
| 278 | |
| 279 | if (strncmp(sysname,"card", 4) != 0) |
| 280 | return; |
| 281 | ErrorF("removing GPU device %s %s\n", syspath, path); |
| 282 | if (!path) |
| 283 | return; |
| 284 | |
| 285 | config_udev_odev_setup_attribs(path, syspath, DeleteGPUDeviceRequest); |
| 286 | return; |
| 287 | } |
| 288 | #endif |
| 289 | |
| 290 | if (asprintf(&value, "udev:%s", syspath) == -1) |
| 291 | return; |
| 292 | |
| 293 | remove_devices("udev", value); |
| 294 | |
| 295 | free(value); |
| 296 | } |
| 297 | |
| 298 | static void |
| 299 | wakeup_handler(pointer data, int err, pointer read_mask) |
| 300 | { |
| 301 | int udev_fd = udev_monitor_get_fd(udev_monitor); |
| 302 | struct udev_device *udev_device; |
| 303 | const char *action; |
| 304 | |
| 305 | if (err < 0) |
| 306 | return; |
| 307 | |
| 308 | if (FD_ISSET(udev_fd, (fd_set *) read_mask)) { |
| 309 | udev_device = udev_monitor_receive_device(udev_monitor); |
| 310 | if (!udev_device) |
| 311 | return; |
| 312 | action = udev_device_get_action(udev_device); |
| 313 | if (action) { |
| 314 | if (!strcmp(action, "add")) { |
| 315 | device_removed(udev_device); |
| 316 | device_added(udev_device); |
| 317 | } else if (!strcmp(action, "change")) { |
| 318 | /* ignore change for the drm devices */ |
| 319 | if (strcmp(udev_device_get_subsystem(udev_device), "drm")) { |
| 320 | device_removed(udev_device); |
| 321 | device_added(udev_device); |
| 322 | } |
| 323 | } |
| 324 | else if (!strcmp(action, "remove")) |
| 325 | device_removed(udev_device); |
| 326 | } |
| 327 | udev_device_unref(udev_device); |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | static void |
| 332 | block_handler(pointer data, struct timeval **tv, pointer read_mask) |
| 333 | { |
| 334 | } |
| 335 | |
| 336 | int |
| 337 | config_udev_pre_init(void) |
| 338 | { |
| 339 | struct udev *udev; |
| 340 | |
| 341 | udev = udev_new(); |
| 342 | if (!udev) |
| 343 | return 0; |
| 344 | |
| 345 | udev_monitor = udev_monitor_new_from_netlink(udev, "udev"); |
| 346 | if (!udev_monitor) |
| 347 | return 0; |
| 348 | |
| 349 | udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "input", |
| 350 | NULL); |
| 351 | /* For Wacom serial devices */ |
| 352 | udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL); |
| 353 | #ifdef CONFIG_UDEV_KMS |
| 354 | /* For output GPU devices */ |
| 355 | udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "drm", NULL); |
| 356 | #endif |
| 357 | |
| 358 | #ifdef HAVE_UDEV_MONITOR_FILTER_ADD_MATCH_TAG |
| 359 | if (ServerIsNotSeat0()) |
| 360 | udev_monitor_filter_add_match_tag(udev_monitor, SeatId); |
| 361 | #endif |
| 362 | if (udev_monitor_enable_receiving(udev_monitor)) { |
| 363 | ErrorF("config/udev: failed to bind the udev monitor\n"); |
| 364 | return 0; |
| 365 | } |
| 366 | return 1; |
| 367 | } |
| 368 | |
| 369 | int |
| 370 | config_udev_init(void) |
| 371 | { |
| 372 | struct udev *udev; |
| 373 | struct udev_enumerate *enumerate; |
| 374 | struct udev_list_entry *devices, *device; |
| 375 | |
| 376 | udev = udev_monitor_get_udev(udev_monitor); |
| 377 | enumerate = udev_enumerate_new(udev); |
| 378 | if (!enumerate) |
| 379 | return 0; |
| 380 | |
| 381 | udev_enumerate_add_match_subsystem(enumerate, "input"); |
| 382 | udev_enumerate_add_match_subsystem(enumerate, "tty"); |
| 383 | #ifdef CONFIG_UDEV_KMS |
| 384 | udev_enumerate_add_match_subsystem(enumerate, "drm"); |
| 385 | #endif |
| 386 | |
| 387 | #ifdef HAVE_UDEV_ENUMERATE_ADD_MATCH_TAG |
| 388 | if (ServerIsNotSeat0()) |
| 389 | udev_enumerate_add_match_tag(enumerate, SeatId); |
| 390 | #endif |
| 391 | |
| 392 | udev_enumerate_scan_devices(enumerate); |
| 393 | devices = udev_enumerate_get_list_entry(enumerate); |
| 394 | udev_list_entry_foreach(device, devices) { |
| 395 | const char *syspath = udev_list_entry_get_name(device); |
| 396 | struct udev_device *udev_device = |
| 397 | udev_device_new_from_syspath(udev, syspath); |
| 398 | |
| 399 | /* Device might be gone by the time we try to open it */ |
| 400 | if (!udev_device) |
| 401 | continue; |
| 402 | |
| 403 | device_added(udev_device); |
| 404 | udev_device_unref(udev_device); |
| 405 | } |
| 406 | udev_enumerate_unref(enumerate); |
| 407 | |
| 408 | RegisterBlockAndWakeupHandlers(block_handler, wakeup_handler, NULL); |
| 409 | AddGeneralSocket(udev_monitor_get_fd(udev_monitor)); |
| 410 | |
| 411 | return 1; |
| 412 | } |
| 413 | |
| 414 | void |
| 415 | config_udev_fini(void) |
| 416 | { |
| 417 | struct udev *udev; |
| 418 | |
| 419 | if (!udev_monitor) |
| 420 | return; |
| 421 | |
| 422 | udev = udev_monitor_get_udev(udev_monitor); |
| 423 | |
| 424 | RemoveGeneralSocket(udev_monitor_get_fd(udev_monitor)); |
| 425 | RemoveBlockAndWakeupHandlers(block_handler, wakeup_handler, NULL); |
| 426 | udev_monitor_unref(udev_monitor); |
| 427 | udev_monitor = NULL; |
| 428 | udev_unref(udev); |
| 429 | } |
| 430 | |
| 431 | #ifdef CONFIG_UDEV_KMS |
| 432 | |
| 433 | static Bool |
| 434 | config_udev_odev_setup_attribs(const char *path, const char *syspath, |
| 435 | config_odev_probe_proc_ptr probe_callback) |
| 436 | { |
| 437 | struct OdevAttributes *attribs = config_odev_allocate_attribute_list(); |
| 438 | int ret; |
| 439 | |
| 440 | if (!attribs) |
| 441 | return FALSE; |
| 442 | |
| 443 | ret = config_odev_add_attribute(attribs, ODEV_ATTRIB_PATH, path); |
| 444 | if (ret == FALSE) |
| 445 | goto fail; |
| 446 | |
| 447 | ret = config_odev_add_attribute(attribs, ODEV_ATTRIB_SYSPATH, syspath); |
| 448 | if (ret == FALSE) |
| 449 | goto fail; |
| 450 | |
| 451 | /* ownership of attribs is passed to probe layer */ |
| 452 | probe_callback(attribs); |
| 453 | return TRUE; |
| 454 | fail: |
| 455 | config_odev_free_attributes(attribs); |
| 456 | free(attribs); |
| 457 | return FALSE; |
| 458 | } |
| 459 | |
| 460 | void |
| 461 | config_udev_odev_probe(config_odev_probe_proc_ptr probe_callback) |
| 462 | { |
| 463 | struct udev *udev; |
| 464 | struct udev_enumerate *enumerate; |
| 465 | struct udev_list_entry *devices, *device; |
| 466 | |
| 467 | udev = udev_monitor_get_udev(udev_monitor); |
| 468 | enumerate = udev_enumerate_new(udev); |
| 469 | if (!enumerate) |
| 470 | return; |
| 471 | |
| 472 | udev_enumerate_add_match_subsystem(enumerate, "drm"); |
| 473 | udev_enumerate_add_match_sysname(enumerate, "card[0-9]*"); |
| 474 | #ifdef HAVE_UDEV_ENUMERATE_ADD_MATCH_TAG |
| 475 | if (ServerIsNotSeat0()) |
| 476 | udev_enumerate_add_match_tag(enumerate, SeatId); |
| 477 | #endif |
| 478 | udev_enumerate_scan_devices(enumerate); |
| 479 | devices = udev_enumerate_get_list_entry(enumerate); |
| 480 | udev_list_entry_foreach(device, devices) { |
| 481 | const char *syspath = udev_list_entry_get_name(device); |
| 482 | struct udev_device *udev_device = udev_device_new_from_syspath(udev, syspath); |
| 483 | const char *path = udev_device_get_devnode(udev_device); |
| 484 | const char *sysname = udev_device_get_sysname(udev_device); |
| 485 | |
| 486 | if (!path || !syspath) |
| 487 | goto no_probe; |
| 488 | else if (strcmp(udev_device_get_subsystem(udev_device), "drm") != 0) |
| 489 | goto no_probe; |
| 490 | else if (strncmp(sysname, "card", 4) != 0) |
| 491 | goto no_probe; |
| 492 | |
| 493 | config_udev_odev_setup_attribs(path, syspath, probe_callback); |
| 494 | |
| 495 | no_probe: |
| 496 | udev_device_unref(udev_device); |
| 497 | } |
| 498 | udev_enumerate_unref(enumerate); |
| 499 | return; |
| 500 | } |
| 501 | #endif |
| 502 | |