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 <json-c/json_tokener.h>
  29 #include <libubox/blobmsg_json.h>
  30 #include <libubox/uloop.h>
  31
  32 #include "procd.h"
  33 #include "sysupgrade.h"
  34 #include "watchdog.h"
  35
  36 static struct blob_buf b;
  37 static int notify;
  38 static struct ubus_context *_ctx;
  39
  40 enum vjson_state {
  41         VJSON_ERROR,
  42         VJSON_CONTINUE,
  43         VJSON_SUCCESS,
  44 };
  45
  46 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
  47                  struct ubus_request_data *req, const char *method,
  48                  struct blob_attr *msg)
  49 {
  50         void *c;
  51         char line[256];
  52         char *key, *val, *next;
  53         struct utsname utsname;
  54         FILE *f;
  55
  56         blob_buf_init(&b, 0);
  57
  58         if (uname(&utsname) >= 0)
  59         {
  60                 blobmsg_add_string(&b, "kernel", utsname.release);
  61                 blobmsg_add_string(&b, "hostname", utsname.nodename);
  62         }
  63
  64         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  65         {
  66                 while(fgets(line, sizeof(line), f))
  67                 {
  68                         key = strtok(line, "\t:");
  69                         val = strtok(NULL, "\t\n");
  70
  71                         if (!key || !val)
  72                                 continue;
  73
  74 #ifdef __aarch64__
  75                         if (!strcasecmp(key, "CPU revision")) {
  76                                 snprintf(line, sizeof(line), "ARMv8 Processor rev %lu", strtoul(val + 2, NULL, 16));
  77                                 blobmsg_add_string(&b, "system", line);
  78                                 break;
  79                         }
  80 #else
  81                         if (!strcasecmp(key, "system type") ||
  82                             !strcasecmp(key, "processor") ||
  83                             !strcasecmp(key, "cpu") ||
  84                             !strcasecmp(key, "model name"))
  85                         {
  86                                 strtoul(val + 2, &key, 0);
  87
  88                                 if (key == (val + 2) || *key != 0)
  89                                 {
  90                                         blobmsg_add_string(&b, "system", val + 2);
  91                                         break;
  92                                 }
  93                         }
  94 #endif
  95                 }
  96
  97                 fclose(f);
  98         }
  99
 100         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL ||
 101             (f = fopen("/proc/device-tree/model", "r")) != NULL)
 102         {
 103                 if (fgets(line, sizeof(line), f))
 104                 {
 105                         val = strtok(line, "\t\n");
 106
 107                         if (val)
 108                                 blobmsg_add_string(&b, "model", val);
 109                 }
 110
 111                 fclose(f);
 112         }
 113         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
 114         {
 115                 while(fgets(line, sizeof(line), f))
 116                 {
 117                         key = strtok(line, "\t:");
 118                         val = strtok(NULL, "\t\n");
 119
 120                         if (!key || !val)
 121                                 continue;
 122
 123                         if (!strcasecmp(key, "machine") ||
 124                             !strcasecmp(key, "hardware"))
 125                         {
 126                                 blobmsg_add_string(&b, "model", val + 2);
 127                                 break;
 128                         }
 129                 }
 130
 131                 fclose(f);
 132         }
 133
 134         if ((f = fopen("/tmp/sysinfo/board_name", "r")) != NULL)
 135         {
 136                 if (fgets(line, sizeof(line), f))
 137                 {
 138                         val = strtok(line, "\t\n");
 139
 140                         if (val)
 141                                 blobmsg_add_string(&b, "board_name", val);
 142                 }
 143
 144                 fclose(f);
 145         }
 146         else if ((f = fopen("/proc/device-tree/compatible", "r")) != NULL)
 147         {
 148                 if (fgets(line, sizeof(line), f))
 149                 {
 150                         val = strtok(line, "\t\n");
 151
 152                         if (val)
 153                         {
 154                                 next = val;
 155                                 while ((next = strchr(next, ',')) != NULL)
 156                                 {
 157                                         *next = '-';
 158                                         next++;
 159                                 }
 160
 161                                 blobmsg_add_string(&b, "board_name", val);
 162                         }
 163                 }
 164
 165                 fclose(f);
 166         }
 167
 168         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 169         {
 170                 c = blobmsg_open_table(&b, "release");
 171
 172                 while (fgets(line, sizeof(line), f))
 173                 {
 174                         char *dest;
 175                         char ch;
 176
 177                         key = line;
 178                         val = strchr(line, '=');
 179                         if (!val)
 180                                 continue;
 181
 182                         *(val++) = 0;
 183
 184                         if (!strcasecmp(key, "DISTRIB_ID"))
 185                                 key = "distribution";
 186                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 187                                 key = "version";
 188                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 189                                 key = "revision";
 190                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 191                                 key = "codename";
 192                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 193                                 key = "target";
 194                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 195                                 key = "description";
 196                         else
 197                                 continue;
 198
 199                         dest = blobmsg_alloc_string_buffer(&b, key, strlen(val));
 200                         if (!dest) {
 201                                 ERROR("Failed to allocate blob.\n");
 202                                 continue;
 203                         }
 204
 205                         while (val && (ch = *(val++)) != 0) {
 206                                 switch (ch) {
 207                                 case '\'':
 208                                 case '"':
 209                                         next = strchr(val, ch);
 210                                         if (next)
 211                                                 *next = 0;
 212
 213                                         strcpy(dest, val);
 214
 215                                         if (next)
 216                                                 val = next + 1;
 217
 218                                         dest += strlen(dest);
 219                                         break;
 220                                 case '\\':
 221                                         *(dest++) = *(val++);
 222                                         break;
 223                                 }
 224                         }
 225                         blobmsg_add_string_buffer(&b);
 226                 }
 227
 228                 blobmsg_close_array(&b, c);
 229
 230                 fclose(f);
 231         }
 232
 233         ubus_send_reply(ctx, req, b.head);
 234
 235         return UBUS_STATUS_OK;
 236 }
 237
 238 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 239                 struct ubus_request_data *req, const char *method,
 240                 struct blob_attr *msg)
 241 {
 242         time_t now;
 243         struct tm *tm;
 244 #ifdef linux
 245         struct sysinfo info;
 246         void *c;
 247         char line[256];
 248         char *key, *val;
 249         unsigned long long available, cached;
 250         FILE *f;
 251
 252         if (sysinfo(&info))
 253                 return UBUS_STATUS_UNKNOWN_ERROR;
 254
 255         if ((f = fopen("/proc/meminfo", "r")) == NULL)
 256                 return UBUS_STATUS_UNKNOWN_ERROR;
 257
 258         /* if linux < 3.14 MemAvailable is not in meminfo */
 259         available = 0;
 260         cached = 0;
 261
 262         while (fgets(line, sizeof(line), f))
 263         {
 264                 key = strtok(line, " :");
 265                 val = strtok(NULL, " ");
 266
 267                 if (!key || !val)
 268                         continue;
 269
 270                 if (!strcasecmp(key, "MemAvailable"))
 271                         available = 1024 * atoll(val);
 272                 else if (!strcasecmp(key, "Cached"))
 273                         cached = 1024 * atoll(val);
 274         }
 275
 276         fclose(f);
 277 #endif
 278
 279         now = time(NULL);
 280
 281         if (!(tm = localtime(&now)))
 282                 return UBUS_STATUS_UNKNOWN_ERROR;
 283
 284         blob_buf_init(&b, 0);
 285
 286         blobmsg_add_u32(&b, "localtime", now + tm->tm_gmtoff);
 287
 288 #ifdef linux
 289         blobmsg_add_u32(&b, "uptime",    info.uptime);
 290
 291         c = blobmsg_open_array(&b, "load");
 292         blobmsg_add_u32(&b, NULL, info.loads[0]);
 293         blobmsg_add_u32(&b, NULL, info.loads[1]);
 294         blobmsg_add_u32(&b, NULL, info.loads[2]);
 295         blobmsg_close_array(&b, c);
 296
 297         c = blobmsg_open_table(&b, "memory");
 298         blobmsg_add_u64(&b, "total",
 299                         (uint64_t)info.mem_unit * (uint64_t)info.totalram);
 300         blobmsg_add_u64(&b, "free",
 301                         (uint64_t)info.mem_unit * (uint64_t)info.freeram);
 302         blobmsg_add_u64(&b, "shared",
 303                         (uint64_t)info.mem_unit * (uint64_t)info.sharedram);
 304         blobmsg_add_u64(&b, "buffered",
 305                         (uint64_t)info.mem_unit * (uint64_t)info.bufferram);
 306         blobmsg_add_u64(&b, "available", available);
 307         blobmsg_add_u64(&b, "cached", cached);
 308         blobmsg_close_table(&b, c);
 309
 310         c = blobmsg_open_table(&b, "swap");
 311         blobmsg_add_u64(&b, "total",
 312                         (uint64_t)info.mem_unit * (uint64_t)info.totalswap);
 313         blobmsg_add_u64(&b, "free",
 314                         (uint64_t)info.mem_unit * (uint64_t)info.freeswap);
 315         blobmsg_close_table(&b, c);
 316 #endif
 317
 318         ubus_send_reply(ctx, req, b.head);
 319
 320         return UBUS_STATUS_OK;
 321 }
 322
 323 static int system_reboot(struct ubus_context *ctx, struct ubus_object *obj,
 324                          struct ubus_request_data *req, const char *method,
 325                          struct blob_attr *msg)
 326 {
 327         procd_shutdown(RB_AUTOBOOT);
 328         return 0;
 329 }
 330
 331 enum {
 332         WDT_FREQUENCY,
 333         WDT_TIMEOUT,
 334         WDT_MAGICCLOSE,
 335         WDT_STOP,
 336         __WDT_MAX
 337 };
 338
 339 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 340         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 341         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 342         [WDT_MAGICCLOSE] = { .name = "magicclose", .type = BLOBMSG_TYPE_BOOL },
 343         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 344 };
 345
 346 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 347                         struct ubus_request_data *req, const char *method,
 348                         struct blob_attr *msg)
 349 {
 350         struct blob_attr *tb[__WDT_MAX];
 351         const char *status;
 352
 353         if (!msg)
 354                 return UBUS_STATUS_INVALID_ARGUMENT;
 355
 356         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 357         if (tb[WDT_FREQUENCY]) {
 358                 unsigned int timeout = tb[WDT_TIMEOUT] ? blobmsg_get_u32(tb[WDT_TIMEOUT]) :
 359                                                 watchdog_timeout(0);
 360                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 361
 362                 if (freq) {
 363                         if (freq > timeout / 2)
 364                                 freq = timeout / 2;
 365                         watchdog_frequency(freq);
 366                 }
 367         }
 368
 369         if (tb[WDT_TIMEOUT]) {
 370                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 371                 unsigned int frequency = watchdog_frequency(0);
 372
 373                 if (timeout <= frequency)
 374                         timeout = frequency * 2;
 375                 watchdog_timeout(timeout);
 376         }
 377
 378         if (tb[WDT_MAGICCLOSE])
 379                 watchdog_set_magicclose(blobmsg_get_bool(tb[WDT_MAGICCLOSE]));
 380
 381         if (tb[WDT_STOP])
 382                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 383
 384         if (watchdog_fd() == NULL)
 385                 status = "offline";
 386         else if (watchdog_get_stopped())
 387                 status = "stopped";
 388         else
 389                 status = "running";
 390
 391         blob_buf_init(&b, 0);
 392         blobmsg_add_string(&b, "status", status);
 393         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 394         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 395         blobmsg_add_u8(&b, "magicclose", watchdog_get_magicclose());
 396         ubus_send_reply(ctx, req, b.head);
 397
 398         return 0;
 399 }
 400
 401 enum {
 402         SIGNAL_PID,
 403         SIGNAL_NUM,
 404         __SIGNAL_MAX
 405 };
 406
 407 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
 408         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 409         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 410 };
 411
 412 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 413                         struct ubus_request_data *req, const char *method,
 414                         struct blob_attr *msg)
 415 {
 416         struct blob_attr *tb[__SIGNAL_MAX];
 417
 418         if (!msg)
 419                 return UBUS_STATUS_INVALID_ARGUMENT;
 420
 421         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 422         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 423                 return UBUS_STATUS_INVALID_ARGUMENT;
 424
 425         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 426
 427         return 0;
 428 }
 429
 430 __attribute__((format (printf, 2, 3)))
 431 static enum vjson_state vjson_error(char **b, const char *fmt, ...)
 432 {
 433         static char buf[256] = { 0 };
 434         const char *pfx = "Firmware image couldn't be validated: ";
 435         va_list va;
 436         int r;
 437
 438         r = snprintf(buf, sizeof(buf), "%s", pfx);
 439         if (r < 0) {
 440                 *b = "vjson_error() snprintf failed";
 441                 return VJSON_ERROR;
 442         }
 443
 444         va_start(va, fmt);
 445         r = vsnprintf(buf+r, sizeof(buf)-r, fmt, va);
 446         if (r < 0) {
 447                 *b = "vjson_error() vsnprintf failed";
 448                 return VJSON_ERROR;
 449         }
 450         va_end(va);
 451
 452         *b = buf;
 453         return VJSON_ERROR;
 454 }
 455
 456 static enum vjson_state vjson_parse_token(json_tokener *tok, char *buf, ssize_t len, char **err)
 457 {
 458         json_object *jsobj = NULL;
 459
 460         jsobj = json_tokener_parse_ex(tok, buf, len);
 461         if (json_tokener_get_error(tok) == json_tokener_continue)
 462                 return VJSON_CONTINUE;
 463
 464         if (json_tokener_get_error(tok) == json_tokener_success) {
 465                 if (json_object_get_type(jsobj) != json_type_object) {
 466                         json_object_put(jsobj);
 467                         return vjson_error(err, "result is not an JSON object");
 468                 }
 469
 470                 blobmsg_add_object(&b, jsobj);
 471                 json_object_put(jsobj);
 472                 return VJSON_SUCCESS;
 473         }
 474
 475         return vjson_error(err, "failed to parse JSON: %s (%d)",
 476                            json_tokener_error_desc(json_tokener_get_error(tok)),
 477                            json_tokener_get_error(tok));
 478 }
 479
 480 static enum vjson_state vjson_parse(int fd, char **err)
 481 {
 482         enum vjson_state r = VJSON_ERROR;
 483         size_t read_count = 0;
 484         char buf[64] = { 0 };
 485         json_tokener *tok;
 486         ssize_t len;
 487         int _errno;
 488
 489         tok = json_tokener_new();
 490         if (!tok)
 491                 return vjson_error(err, "json_tokener_new() failed");
 492
 493         vjson_error(err, "incomplete JSON input");
 494
 495         while ((len = read(fd, buf, sizeof(buf)))) {
 496                 if (len < 0 && errno == EINTR)
 497                         continue;
 498
 499                 if (len < 0) {
 500                         _errno = errno;
 501                         json_tokener_free(tok);
 502                         return vjson_error(err, "read() failed: %s (%d)",
 503                                            strerror(_errno), _errno);
 504                 }
 505
 506                 read_count += len;
 507                 r = vjson_parse_token(tok, buf, len, err);
 508                 if (r != VJSON_CONTINUE)
 509                         break;
 510
 511                 memset(buf, 0, sizeof(buf));
 512         }
 513
 514         if (read_count == 0)
 515                 vjson_error(err, "no JSON input");
 516
 517         json_tokener_free(tok);
 518         return r;
 519 }
 520
 521 /**
 522  * validate_firmware_image_call - perform validation & store result in global b
 523  *
 524  * @file: firmware image path
 525  */
 526 static enum vjson_state validate_firmware_image_call(const char *file, char **err)
 527 {
 528         const char *path = "/usr/libexec/validate_firmware_image";
 529         enum vjson_state ret = VJSON_ERROR;
 530         int _errno;
 531         int fds[2];
 532         int fd;
 533
 534         blob_buf_init(&b, 0);
 535         vjson_error(err, "unhandled error");
 536
 537         if (pipe(fds)) {
 538                 _errno = errno;
 539                 return vjson_error(err, "pipe() failed: %s (%d)",
 540                                    strerror(_errno), _errno);
 541         }
 542
 543         switch (fork()) {
 544         case -1:
 545                 _errno = errno;
 546
 547                 close(fds[0]);
 548                 close(fds[1]);
 549
 550                 return vjson_error(err, "fork() failed: %s (%d)",
 551                                    strerror(_errno), _errno);
 552         case 0:
 553                 /* Set stdin & stderr to /dev/null */
 554                 fd = open("/dev/null", O_RDWR);
 555                 if (fd >= 0) {
 556                         dup2(fd, 0);
 557                         dup2(fd, 2);
 558                         close(fd);
 559                 }
 560
 561                 /* Set stdout to the shared pipe */
 562                 dup2(fds[1], 1);
 563                 close(fds[0]);
 564                 close(fds[1]);
 565
 566                 execl(path, path, file, NULL);
 567                 exit(errno);
 568         }
 569
 570         /* Parent process */
 571         close(fds[1]);
 572
 573         ret = vjson_parse(fds[0], err);
 574         close(fds[0]);
 575
 576         return ret;
 577 }
 578
 579 enum {
 580         VALIDATE_FIRMWARE_IMAGE_PATH,
 581         __VALIDATE_FIRMWARE_IMAGE_MAX,
 582 };
 583
 584 static const struct blobmsg_policy validate_firmware_image_policy[__VALIDATE_FIRMWARE_IMAGE_MAX] = {
 585         [VALIDATE_FIRMWARE_IMAGE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 586 };
 587
 588 static int validate_firmware_image(struct ubus_context *ctx,
 589                                    struct ubus_object *obj,
 590                                    struct ubus_request_data *req,
 591                                    const char *method, struct blob_attr *msg)
 592 {
 593         struct blob_attr *tb[__VALIDATE_FIRMWARE_IMAGE_MAX];
 594         enum vjson_state ret = VJSON_ERROR;
 595         char *err;
 596
 597         if (!msg)
 598                 return UBUS_STATUS_INVALID_ARGUMENT;
 599
 600         blobmsg_parse(validate_firmware_image_policy, __VALIDATE_FIRMWARE_IMAGE_MAX, tb, blob_data(msg), blob_len(msg));
 601         if (!tb[VALIDATE_FIRMWARE_IMAGE_PATH])
 602                 return UBUS_STATUS_INVALID_ARGUMENT;
 603
 604         ret = validate_firmware_image_call(blobmsg_get_string(tb[VALIDATE_FIRMWARE_IMAGE_PATH]), &err);
 605         if (ret != VJSON_SUCCESS)
 606                 return UBUS_STATUS_UNKNOWN_ERROR;
 607
 608         ubus_send_reply(ctx, req, b.head);
 609
 610         return UBUS_STATUS_OK;
 611 }
 612
 613 enum {
 614         SYSUPGRADE_PATH,
 615         SYSUPGRADE_FORCE,
 616         SYSUPGRADE_BACKUP,
 617         SYSUPGRADE_PREFIX,
 618         SYSUPGRADE_COMMAND,
 619         SYSUPGRADE_OPTIONS,
 620         __SYSUPGRADE_MAX
 621 };
 622
 623 static const struct blobmsg_policy sysupgrade_policy[__SYSUPGRADE_MAX] = {
 624         [SYSUPGRADE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 625         [SYSUPGRADE_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_BOOL },
 626         [SYSUPGRADE_BACKUP] = { .name = "backup", .type = BLOBMSG_TYPE_STRING },
 627         [SYSUPGRADE_PREFIX] = { .name = "prefix", .type = BLOBMSG_TYPE_STRING },
 628         [SYSUPGRADE_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_STRING },
 629         [SYSUPGRADE_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_TABLE },
 630 };
 631
 632 static void sysupgrade_error(struct ubus_context *ctx,
 633                              struct ubus_request_data *req,
 634                              const char *message)
 635 {
 636         void *c;
 637
 638         blob_buf_init(&b, 0);
 639
 640         c = blobmsg_open_table(&b, "error");
 641         blobmsg_add_string(&b, "message", message);
 642         blobmsg_close_table(&b, c);
 643
 644         ubus_send_reply(ctx, req, b.head);
 645 }
 646
 647 static int sysupgrade(struct ubus_context *ctx, struct ubus_object *obj,
 648                       struct ubus_request_data *req, const char *method,
 649                       struct blob_attr *msg)
 650 {
 651         enum {
 652                 VALIDATION_VALID,
 653                 VALIDATION_FORCEABLE,
 654                 VALIDATION_ALLOW_BACKUP,
 655                 __VALIDATION_MAX
 656         };
 657         static const struct blobmsg_policy validation_policy[__VALIDATION_MAX] = {
 658                 [VALIDATION_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_BOOL },
 659                 [VALIDATION_FORCEABLE] = { .name = "forceable", .type = BLOBMSG_TYPE_BOOL },
 660                 [VALIDATION_ALLOW_BACKUP] = { .name = "allow_backup", .type = BLOBMSG_TYPE_BOOL },
 661         };
 662         struct blob_attr *validation[__VALIDATION_MAX];
 663         struct blob_attr *tb[__SYSUPGRADE_MAX];
 664         bool valid, forceable, allow_backup;
 665         enum vjson_state ret = VJSON_ERROR;
 666         char *err;
 667
 668         if (!msg)
 669                 return UBUS_STATUS_INVALID_ARGUMENT;
 670
 671         blobmsg_parse(sysupgrade_policy, __SYSUPGRADE_MAX, tb, blob_data(msg), blob_len(msg));
 672         if (!tb[SYSUPGRADE_PATH] || !tb[SYSUPGRADE_PREFIX])
 673                 return UBUS_STATUS_INVALID_ARGUMENT;
 674
 675         ret = validate_firmware_image_call(blobmsg_get_string(tb[SYSUPGRADE_PATH]), &err);
 676         if (ret != VJSON_SUCCESS) {
 677                 sysupgrade_error(ctx, req, err);
 678                 return UBUS_STATUS_UNKNOWN_ERROR;
 679         }
 680
 681         blobmsg_parse(validation_policy, __VALIDATION_MAX, validation, blob_data(b.head), blob_len(b.head));
 682
 683         if (!validation[VALIDATION_VALID] || !validation[VALIDATION_FORCEABLE] ||
 684             !validation[VALIDATION_ALLOW_BACKUP]) {
 685                 sysupgrade_error(ctx, req, "Validation script provided invalid input");
 686                 return UBUS_STATUS_INVALID_ARGUMENT;
 687         }
 688
 689         valid = validation[VALIDATION_VALID] && blobmsg_get_bool(validation[VALIDATION_VALID]);
 690         forceable = validation[VALIDATION_FORCEABLE] && blobmsg_get_bool(validation[VALIDATION_FORCEABLE]);
 691         allow_backup = validation[VALIDATION_ALLOW_BACKUP] && blobmsg_get_bool(validation[VALIDATION_ALLOW_BACKUP]);
 692
 693         if (!valid) {
 694                 if (!forceable) {
 695                         sysupgrade_error(ctx, req, "Firmware image is broken and cannot be installed");
 696                         return UBUS_STATUS_NOT_SUPPORTED;
 697                 } else if (!tb[SYSUPGRADE_FORCE] || !blobmsg_get_bool(tb[SYSUPGRADE_FORCE])) {
 698                         sysupgrade_error(ctx, req, "Firmware image is invalid");
 699                         return UBUS_STATUS_NOT_SUPPORTED;
 700                 }
 701         } else if (!allow_backup && tb[SYSUPGRADE_BACKUP]) {
 702                 sysupgrade_error(ctx, req, "Firmware image doesn't allow preserving a backup");
 703                 return UBUS_STATUS_NOT_SUPPORTED;
 704         }
 705
 706         sysupgrade_exec_upgraded(blobmsg_get_string(tb[SYSUPGRADE_PREFIX]),
 707                                  blobmsg_get_string(tb[SYSUPGRADE_PATH]),
 708                                  tb[SYSUPGRADE_BACKUP] ? blobmsg_get_string(tb[SYSUPGRADE_BACKUP]) : NULL,
 709                                  tb[SYSUPGRADE_COMMAND] ? blobmsg_get_string(tb[SYSUPGRADE_COMMAND]) : NULL,
 710                                  tb[SYSUPGRADE_OPTIONS]);
 711
 712         /* sysupgrade_exec_upgraded() will never return unless something has gone wrong */
 713         return UBUS_STATUS_UNKNOWN_ERROR;
 714 }
 715
 716 static void
 717 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
 718 {
 719         notify = obj->has_subscribers;
 720 }
 721
 722
 723 static const struct ubus_method system_methods[] = {
 724         UBUS_METHOD_NOARG("board", system_board),
 725         UBUS_METHOD_NOARG("info",  system_info),
 726         UBUS_METHOD_NOARG("reboot", system_reboot),
 727         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 728         UBUS_METHOD("signal", proc_signal, signal_policy),
 729         UBUS_METHOD("validate_firmware_image", validate_firmware_image, validate_firmware_image_policy),
 730         UBUS_METHOD("sysupgrade", sysupgrade, sysupgrade_policy),
 731 };
 732
 733 static struct ubus_object_type system_object_type =
 734         UBUS_OBJECT_TYPE("system", system_methods);
 735
 736 static struct ubus_object system_object = {
 737         .name = "system",
 738         .type = &system_object_type,
 739         .methods = system_methods,
 740         .n_methods = ARRAY_SIZE(system_methods),
 741         .subscribe_cb = procd_subscribe_cb,
 742 };
 743
 744 void
 745 procd_bcast_event(char *event, struct blob_attr *msg)
 746 {
 747         int ret;
 748
 749         if (!notify)
 750                 return;
 751
 752         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
 753         if (ret)
 754                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
 755 }
 756
 757 void ubus_init_system(struct ubus_context *ctx)
 758 {
 759         int ret;
 760
 761         _ctx = ctx;
 762         ret = ubus_add_object(ctx, &system_object);
 763         if (ret)
 764                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 765 }