system.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <sys/utsname.h>
  16 #ifdef linux
  17 #include <sys/sysinfo.h>
  18 #endif
  19 #include <sys/ioctl.h>
  20 #include <sys/types.h>
  21 #include <sys/reboot.h>
  22 #include <sys/stat.h>
  23 #include <fcntl.h>
  24 #include <signal.h>
  25 #include <unistd.h>
  26 #include <stdlib.h>
  27
  28 #include <libubox/uloop.h>
  29
  30 #include "procd.h"
  31 #include "watchdog.h"
  32
  33 static struct blob_buf b;
  34 static int notify;
  35 static struct ubus_context *_ctx;
  36
  37 int upgrade_running = 0;
  38
  39 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
  40                  struct ubus_request_data *req, const char *method,
  41                  struct blob_attr *msg)
  42 {
  43         void *c;
  44         char line[256];
  45         char *key, *val, *next;
  46         struct utsname utsname;
  47         FILE *f;
  48
  49         blob_buf_init(&b, 0);
  50
  51         if (uname(&utsname) >= 0)
  52         {
  53                 blobmsg_add_string(&b, "kernel", utsname.release);
  54                 blobmsg_add_string(&b, "hostname", utsname.nodename);
  55         }
  56
  57         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  58         {
  59                 while(fgets(line, sizeof(line), f))
  60                 {
  61                         key = strtok(line, "\t:");
  62                         val = strtok(NULL, "\t\n");
  63
  64                         if (!key || !val)
  65                                 continue;
  66
  67                         if (!strcasecmp(key, "system type") ||
  68                             !strcasecmp(key, "processor") ||
  69                             !strcasecmp(key, "model name"))
  70                         {
  71                                 strtoul(val + 2, &key, 0);
  72
  73                                 if (key == (val + 2) || *key != 0)
  74                                 {
  75                                         blobmsg_add_string(&b, "system", val + 2);
  76                                         break;
  77                                 }
  78                         }
  79                 }
  80
  81                 fclose(f);
  82         }
  83
  84         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL ||
  85             (f = fopen("/proc/device-tree/model", "r")) != NULL)
  86         {
  87                 if (fgets(line, sizeof(line), f))
  88                 {
  89                         val = strtok(line, "\t\n");
  90
  91                         if (val)
  92                                 blobmsg_add_string(&b, "model", val);
  93                 }
  94
  95                 fclose(f);
  96         }
  97         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  98         {
  99                 while(fgets(line, sizeof(line), f))
 100                 {
 101                         key = strtok(line, "\t:");
 102                         val = strtok(NULL, "\t\n");
 103
 104                         if (!key || !val)
 105                                 continue;
 106
 107                         if (!strcasecmp(key, "machine") ||
 108                             !strcasecmp(key, "hardware"))
 109                         {
 110                                 blobmsg_add_string(&b, "model", val + 2);
 111                                 break;
 112                         }
 113                 }
 114
 115                 fclose(f);
 116         }
 117
 118         if ((f = fopen("/tmp/sysinfo/board_name", "r")) != NULL)
 119         {
 120                 if (fgets(line, sizeof(line), f))
 121                 {
 122                         val = strtok(line, "\t\n");
 123
 124                         if (val)
 125                                 blobmsg_add_string(&b, "board_name", val);
 126                 }
 127
 128                 fclose(f);
 129         }
 130         else if ((f = fopen("/proc/device-tree/compatible", "r")) != NULL)
 131         {
 132                 if (fgets(line, sizeof(line), f))
 133                 {
 134                         val = strtok(line, "\t\n");
 135
 136                         if (val)
 137                         {
 138                                 next = val;
 139                                 while ((next = strchr(next, ',')) != NULL)
 140                                 {
 141                                         *next = '-';
 142                                         next++;
 143                                 }
 144
 145                                 blobmsg_add_string(&b, "board_name", val);
 146                         }
 147                 }
 148
 149                 fclose(f);
 150         }
 151
 152         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 153         {
 154                 c = blobmsg_open_table(&b, "release");
 155
 156                 while (fgets(line, sizeof(line), f))
 157                 {
 158                         char *dest;
 159                         char ch;
 160
 161                         key = line;
 162                         val = strchr(line, '=');
 163                         if (!val)
 164                                 continue;
 165
 166                         *(val++) = 0;
 167
 168                         if (!strcasecmp(key, "DISTRIB_ID"))
 169                                 key = "distribution";
 170                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 171                                 key = "version";
 172                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 173                                 key = "revision";
 174                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 175                                 key = "codename";
 176                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 177                                 key = "target";
 178                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 179                                 key = "description";
 180                         else
 181                                 continue;
 182
 183                         dest = blobmsg_alloc_string_buffer(&b, key, strlen(val));
 184                         if (!dest) {
 185                                 ERROR("Failed to allocate blob.\n");
 186                                 continue;
 187                         }
 188
 189                         while (val && (ch = *(val++)) != 0) {
 190                                 switch (ch) {
 191                                 case '\'':
 192                                 case '"':
 193                                         next = strchr(val, ch);
 194                                         if (next)
 195                                                 *next = 0;
 196
 197                                         strcpy(dest, val);
 198
 199                                         if (next)
 200                                                 val = next + 1;
 201
 202                                         dest += strlen(dest);
 203                                         break;
 204                                 case '\\':
 205                                         *(dest++) = *(val++);
 206                                         break;
 207                                 }
 208                         }
 209                         blobmsg_add_string_buffer(&b);
 210                 }
 211
 212                 blobmsg_close_array(&b, c);
 213
 214                 fclose(f);
 215         }
 216
 217         ubus_send_reply(ctx, req, b.head);
 218
 219         return UBUS_STATUS_OK;
 220 }
 221
 222 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 223                 struct ubus_request_data *req, const char *method,
 224                 struct blob_attr *msg)
 225 {
 226         time_t now;
 227         struct tm *tm;
 228 #ifdef linux
 229         struct sysinfo info;
 230         void *c;
 231
 232         if (sysinfo(&info))
 233                 return UBUS_STATUS_UNKNOWN_ERROR;
 234 #endif
 235
 236         now = time(NULL);
 237
 238         if (!(tm = localtime(&now)))
 239                 return UBUS_STATUS_UNKNOWN_ERROR;
 240
 241         blob_buf_init(&b, 0);
 242
 243         blobmsg_add_u32(&b, "localtime", now + tm->tm_gmtoff);
 244
 245 #ifdef linux
 246         blobmsg_add_u32(&b, "uptime",    info.uptime);
 247
 248         c = blobmsg_open_array(&b, "load");
 249         blobmsg_add_u32(&b, NULL, info.loads[0]);
 250         blobmsg_add_u32(&b, NULL, info.loads[1]);
 251         blobmsg_add_u32(&b, NULL, info.loads[2]);
 252         blobmsg_close_array(&b, c);
 253
 254         c = blobmsg_open_table(&b, "memory");
 255         blobmsg_add_u64(&b, "total",    info.mem_unit * info.totalram);
 256         blobmsg_add_u64(&b, "free",     info.mem_unit * info.freeram);
 257         blobmsg_add_u64(&b, "shared",   info.mem_unit * info.sharedram);
 258         blobmsg_add_u64(&b, "buffered", info.mem_unit * info.bufferram);
 259         blobmsg_close_table(&b, c);
 260
 261         c = blobmsg_open_table(&b, "swap");
 262         blobmsg_add_u64(&b, "total",    info.mem_unit * info.totalswap);
 263         blobmsg_add_u64(&b, "free",     info.mem_unit * info.freeswap);
 264         blobmsg_close_table(&b, c);
 265 #endif
 266
 267         ubus_send_reply(ctx, req, b.head);
 268
 269         return UBUS_STATUS_OK;
 270 }
 271
 272 static int system_upgrade(struct ubus_context *ctx, struct ubus_object *obj,
 273                         struct ubus_request_data *req, const char *method,
 274                         struct blob_attr *msg)
 275 {
 276         upgrade_running = 1;
 277         return 0;
 278 }
 279
 280 static int system_reboot(struct ubus_context *ctx, struct ubus_object *obj,
 281                          struct ubus_request_data *req, const char *method,
 282                          struct blob_attr *msg)
 283 {
 284         procd_shutdown(RB_AUTOBOOT);
 285         return 0;
 286 }
 287
 288 enum {
 289         WDT_FREQUENCY,
 290         WDT_TIMEOUT,
 291         WDT_STOP,
 292         __WDT_MAX
 293 };
 294
 295 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 296         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 297         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 298         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 299 };
 300
 301 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 302                         struct ubus_request_data *req, const char *method,
 303                         struct blob_attr *msg)
 304 {
 305         struct blob_attr *tb[__WDT_MAX];
 306         const char *status;
 307
 308         if (!msg)
 309                 return UBUS_STATUS_INVALID_ARGUMENT;
 310
 311         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 312         if (tb[WDT_FREQUENCY]) {
 313                 unsigned int timeout = watchdog_timeout(0);
 314                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 315
 316                 if (freq) {
 317                         if (freq > timeout / 2)
 318                                 freq = timeout / 2;
 319                         watchdog_frequency(freq);
 320                 }
 321         }
 322
 323         if (tb[WDT_TIMEOUT]) {
 324                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 325                 unsigned int frequency = watchdog_frequency(0);
 326
 327                 if (timeout <= frequency)
 328                         timeout = frequency * 2;
 329                  watchdog_timeout(timeout);
 330         }
 331
 332         if (tb[WDT_STOP])
 333                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 334
 335         if (watchdog_fd() == NULL)
 336                 status = "offline";
 337         else if (watchdog_get_stopped())
 338                 status = "stopped";
 339         else
 340                 status = "running";
 341
 342         blob_buf_init(&b, 0);
 343         blobmsg_add_string(&b, "status", status);
 344         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 345         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 346         ubus_send_reply(ctx, req, b.head);
 347
 348         return 0;
 349 }
 350
 351 enum {
 352         SIGNAL_PID,
 353         SIGNAL_NUM,
 354         __SIGNAL_MAX
 355 };
 356
 357 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
 358         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 359         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 360 };
 361
 362 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 363                         struct ubus_request_data *req, const char *method,
 364                         struct blob_attr *msg)
 365 {
 366         struct blob_attr *tb[__SIGNAL_MAX];
 367
 368         if (!msg)
 369                 return UBUS_STATUS_INVALID_ARGUMENT;
 370
 371         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 372         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 373                 return UBUS_STATUS_INVALID_ARGUMENT;
 374
 375         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 376
 377         return 0;
 378 }
 379
 380 enum {
 381         NAND_PATH,
 382         __NAND_MAX
 383 };
 384
 385 static const struct blobmsg_policy nand_policy[__NAND_MAX] = {
 386         [NAND_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 387 };
 388
 389 static void
 390 procd_spawn_upgraded(char *path)
 391 {
 392         char *wdt_fd = watchdog_fd();
 393         char *argv[] = { "/tmp/upgraded", NULL, NULL};
 394
 395         argv[1] = path;
 396
 397         DEBUG(2, "Exec to upgraded now\n");
 398         if (wdt_fd) {
 399                 watchdog_no_cloexec();
 400                 setenv("WDTFD", wdt_fd, 1);
 401         }
 402         execvp(argv[0], argv);
 403 }
 404
 405 static int nand_set(struct ubus_context *ctx, struct ubus_object *obj,
 406                         struct ubus_request_data *req, const char *method,
 407                         struct blob_attr *msg)
 408 {
 409         struct blob_attr *tb[__NAND_MAX];
 410
 411         if (!msg)
 412                 return UBUS_STATUS_INVALID_ARGUMENT;
 413
 414         blobmsg_parse(nand_policy, __NAND_MAX, tb, blob_data(msg), blob_len(msg));
 415         if (!tb[NAND_PATH])
 416                 return UBUS_STATUS_INVALID_ARGUMENT;
 417
 418         procd_spawn_upgraded(blobmsg_get_string(tb[NAND_PATH]));
 419         fprintf(stderr, "Yikees, something went wrong. no /sbin/upgraded ?\n");
 420         return 0;
 421 }
 422
 423 static void
 424 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
 425 {
 426         notify = obj->has_subscribers;
 427 }
 428
 429
 430 static const struct ubus_method system_methods[] = {
 431         UBUS_METHOD_NOARG("board", system_board),
 432         UBUS_METHOD_NOARG("info",  system_info),
 433         UBUS_METHOD_NOARG("upgrade", system_upgrade),
 434         UBUS_METHOD_NOARG("reboot", system_reboot),
 435         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 436         UBUS_METHOD("signal", proc_signal, signal_policy),
 437
 438         /* must remain at the end as it ia not always loaded */
 439         UBUS_METHOD("nandupgrade", nand_set, nand_policy),
 440 };
 441
 442 static struct ubus_object_type system_object_type =
 443         UBUS_OBJECT_TYPE("system", system_methods);
 444
 445 static struct ubus_object system_object = {
 446         .name = "system",
 447         .type = &system_object_type,
 448         .methods = system_methods,
 449         .n_methods = ARRAY_SIZE(system_methods),
 450         .subscribe_cb = procd_subscribe_cb,
 451 };
 452
 453 void
 454 procd_bcast_event(char *event, struct blob_attr *msg)
 455 {
 456         int ret;
 457
 458         if (!notify)
 459                 return;
 460
 461         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
 462         if (ret)
 463                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
 464 }
 465
 466 void ubus_init_system(struct ubus_context *ctx)
 467 {
 468         struct stat s;
 469         int ret;
 470
 471         if (stat("/sbin/upgraded", &s))
 472                 system_object.n_methods -= 1;
 473
 474         _ctx = ctx;
 475         ret = ubus_add_object(ctx, &system_object);
 476         if (ret)
 477                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 478 }