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 <sys/statvfs.h>
  24 #include <fcntl.h>
  25 #include <signal.h>
  26 #include <unistd.h>
  27 #include <stdlib.h>
  28
  29 #include <json-c/json_tokener.h>
  30 #include <libubox/blobmsg_json.h>
  31 #include <libubox/uloop.h>
  32
  33 #include "procd.h"
  34 #include "sysupgrade.h"
  35 #include "watchdog.h"
  36 #include "service/service.h"
  37
  38 static struct blob_buf b;
  39 static int notify;
  40 static struct ubus_context *_ctx;
  41 static int initramfs;
  42
  43 enum vjson_state {
  44         VJSON_ERROR,
  45         VJSON_CONTINUE,
  46         VJSON_SUCCESS,
  47 };
  48
  49 static const char *system_rootfs_type(void) {
  50         const char proc_mounts[] = "/proc/self/mounts";
  51         static char fstype[16] = { 0 };
  52         char *mountstr = NULL, *mp = "/", *pos, *tmp;
  53         FILE *mounts;
  54         ssize_t nread;
  55         size_t len = 0;
  56         bool found;
  57
  58         if (initramfs)
  59                 return "initramfs";
  60
  61         if (fstype[0])
  62                 return fstype;
  63
  64         mounts = fopen(proc_mounts, "r");
  65         if (!mounts)
  66                 return NULL;
  67
  68         while ((nread = getline(&mountstr, &len, mounts)) != -1) {
  69                 found = false;
  70
  71                 pos = strchr(mountstr, ' ');
  72                 if (!pos)
  73                         continue;
  74
  75                 tmp = pos + 1;
  76                 pos = strchr(tmp, ' ');
  77                 if (!pos)
  78                         continue;
  79
  80                 *pos = '\0';
  81                 if (strcmp(tmp, mp))
  82                         continue;
  83
  84                 tmp = pos + 1;
  85                 pos = strchr(tmp, ' ');
  86                 if (!pos)
  87                         continue;
  88
  89                 *pos = '\0';
  90
  91                 if (!strcmp(tmp, "overlay")) {
  92                         /*
  93                          * there is no point in parsing overlay option string for
  94                          * lowerdir, as that can point to "/" being a previous
  95                          * overlay mount (after firstboot or sysuprade config
  96                          * restore). Hence just assume the lowerdir is "/rom" and
  97                          * restart searching for that instead.
  98                          */
  99                         mp = "/rom";
 100                         fseek(mounts, 0, SEEK_SET);
 101                         continue;
 102                 }
 103
 104                 found = true;
 105                 break;
 106         }
 107
 108         if (found)
 109                 strncpy(fstype, tmp, sizeof(fstype) - 1);
 110
 111         fstype[sizeof(fstype) - 1]= '\0';
 112         free(mountstr);
 113         fclose(mounts);
 114
 115         if (found)
 116                 return fstype;
 117         else
 118                 return NULL;
 119 }
 120
 121 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
 122                  struct ubus_request_data *req, const char *method,
 123                  struct blob_attr *msg)
 124 {
 125         void *c;
 126         char line[256];
 127         char *key, *val, *next;
 128         const char *rootfs_type = system_rootfs_type();
 129         struct utsname utsname;
 130         FILE *f;
 131
 132         blob_buf_init(&b, 0);
 133
 134         if (uname(&utsname) >= 0)
 135         {
 136                 blobmsg_add_string(&b, "kernel", utsname.release);
 137                 blobmsg_add_string(&b, "hostname", utsname.nodename);
 138         }
 139
 140         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
 141         {
 142                 while(fgets(line, sizeof(line), f))
 143                 {
 144                         key = strtok(line, "\t:");
 145                         val = strtok(NULL, "\t\n");
 146
 147                         if (!key || !val)
 148                                 continue;
 149
 150 #ifdef __aarch64__
 151                         if (!strcasecmp(key, "CPU revision")) {
 152                                 snprintf(line, sizeof(line), "ARMv8 Processor rev %lu", strtoul(val + 2, NULL, 16));
 153                                 blobmsg_add_string(&b, "system", line);
 154                                 break;
 155                         }
 156 #elif __riscv
 157                         if (!strcasecmp(key, "isa")) {
 158                                 snprintf(line, sizeof(line), "RISC-V (%s)", val + 2);
 159                                 blobmsg_add_string(&b, "system", line);
 160                                 break;
 161                         }
 162 #else
 163                         if (!strcasecmp(key, "system type") ||
 164                             !strcasecmp(key, "processor") ||
 165                             !strcasecmp(key, "cpu") ||
 166                             !strcasecmp(key, "model name"))
 167                         {
 168                                 strtoul(val + 2, &key, 0);
 169
 170                                 if (key == (val + 2) || *key != 0)
 171                                 {
 172                                         blobmsg_add_string(&b, "system", val + 2);
 173                                         break;
 174                                 }
 175                         }
 176 #endif
 177                 }
 178
 179                 fclose(f);
 180         }
 181
 182         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL ||
 183             (f = fopen("/proc/device-tree/model", "r")) != NULL)
 184         {
 185                 if (fgets(line, sizeof(line), f))
 186                 {
 187                         val = strtok(line, "\t\n");
 188
 189                         if (val)
 190                                 blobmsg_add_string(&b, "model", val);
 191                 }
 192
 193                 fclose(f);
 194         }
 195         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
 196         {
 197                 while(fgets(line, sizeof(line), f))
 198                 {
 199                         key = strtok(line, "\t:");
 200                         val = strtok(NULL, "\t\n");
 201
 202                         if (!key || !val)
 203                                 continue;
 204
 205                         if (!strcasecmp(key, "machine") ||
 206                             !strcasecmp(key, "hardware"))
 207                         {
 208                                 blobmsg_add_string(&b, "model", val + 2);
 209                                 break;
 210                         }
 211                 }
 212
 213                 fclose(f);
 214         }
 215
 216         if ((f = fopen("/tmp/sysinfo/board_name", "r")) != NULL)
 217         {
 218                 if (fgets(line, sizeof(line), f))
 219                 {
 220                         val = strtok(line, "\t\n");
 221
 222                         if (val)
 223                                 blobmsg_add_string(&b, "board_name", val);
 224                 }
 225
 226                 fclose(f);
 227         }
 228         else if ((f = fopen("/proc/device-tree/compatible", "r")) != NULL)
 229         {
 230                 if (fgets(line, sizeof(line), f))
 231                 {
 232                         val = strtok(line, "\t\n");
 233
 234                         if (val)
 235                         {
 236                                 next = val;
 237                                 while ((next = strchr(next, ',')) != NULL)
 238                                 {
 239                                         *next = '-';
 240                                         next++;
 241                                 }
 242
 243                                 blobmsg_add_string(&b, "board_name", val);
 244                         }
 245                 }
 246
 247                 fclose(f);
 248         }
 249
 250         if (rootfs_type)
 251                 blobmsg_add_string(&b, "rootfs_type", rootfs_type);
 252
 253         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 254         {
 255                 c = blobmsg_open_table(&b, "release");
 256
 257                 while (fgets(line, sizeof(line), f))
 258                 {
 259                         char *dest;
 260                         char ch;
 261
 262                         key = line;
 263                         val = strchr(line, '=');
 264                         if (!val)
 265                                 continue;
 266
 267                         *(val++) = 0;
 268
 269                         if (!strcasecmp(key, "DISTRIB_ID"))
 270                                 key = "distribution";
 271                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 272                                 key = "version";
 273                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 274                                 key = "revision";
 275                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 276                                 key = "codename";
 277                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 278                                 key = "target";
 279                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 280                                 key = "description";
 281                         else
 282                                 continue;
 283
 284                         dest = blobmsg_alloc_string_buffer(&b, key, strlen(val));
 285                         if (!dest) {
 286                                 ERROR("Failed to allocate blob.\n");
 287                                 continue;
 288                         }
 289
 290                         while (val && (ch = *(val++)) != 0) {
 291                                 switch (ch) {
 292                                 case '\'':
 293                                 case '"':
 294                                         next = strchr(val, ch);
 295                                         if (next)
 296                                                 *next = 0;
 297
 298                                         strcpy(dest, val);
 299
 300                                         if (next)
 301                                                 val = next + 1;
 302
 303                                         dest += strlen(dest);
 304                                         break;
 305                                 case '\\':
 306                                         *(dest++) = *(val++);
 307                                         break;
 308                                 }
 309                         }
 310                         blobmsg_add_string_buffer(&b);
 311                 }
 312
 313                 blobmsg_close_array(&b, c);
 314
 315                 fclose(f);
 316         }
 317
 318         ubus_send_reply(ctx, req, b.head);
 319
 320         return UBUS_STATUS_OK;
 321 }
 322
 323 static unsigned long
 324 kscale(unsigned long b, unsigned long bs)
 325 {
 326         return (b * (unsigned long long) bs + 1024/2) / 1024;
 327 }
 328
 329 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 330                 struct ubus_request_data *req, const char *method,
 331                 struct blob_attr *msg)
 332 {
 333         time_t now;
 334         struct tm *tm;
 335 #ifdef linux
 336         struct sysinfo info;
 337         void *c;
 338         char line[256];
 339         char *key, *val;
 340         unsigned long long available, cached;
 341         FILE *f;
 342         int i;
 343         struct statvfs s;
 344         const char *fslist[] = {
 345                 "/",    "root",
 346                 "/tmp", "tmp",
 347         };
 348
 349         if (sysinfo(&info))
 350                 return UBUS_STATUS_UNKNOWN_ERROR;
 351
 352         if ((f = fopen("/proc/meminfo", "r")) == NULL)
 353                 return UBUS_STATUS_UNKNOWN_ERROR;
 354
 355         /* if linux < 3.14 MemAvailable is not in meminfo */
 356         available = 0;
 357         cached = 0;
 358
 359         while (fgets(line, sizeof(line), f))
 360         {
 361                 key = strtok(line, " :");
 362                 val = strtok(NULL, " ");
 363
 364                 if (!key || !val)
 365                         continue;
 366
 367                 if (!strcasecmp(key, "MemAvailable"))
 368                         available = 1024 * atoll(val);
 369                 else if (!strcasecmp(key, "Cached"))
 370                         cached = 1024 * atoll(val);
 371         }
 372
 373         fclose(f);
 374 #endif
 375
 376         now = time(NULL);
 377
 378         if (!(tm = localtime(&now)))
 379                 return UBUS_STATUS_UNKNOWN_ERROR;
 380
 381         blob_buf_init(&b, 0);
 382
 383         blobmsg_add_u32(&b, "localtime", now + tm->tm_gmtoff);
 384
 385 #ifdef linux
 386         blobmsg_add_u32(&b, "uptime",    info.uptime);
 387
 388         c = blobmsg_open_array(&b, "load");
 389         blobmsg_add_u32(&b, NULL, info.loads[0]);
 390         blobmsg_add_u32(&b, NULL, info.loads[1]);
 391         blobmsg_add_u32(&b, NULL, info.loads[2]);
 392         blobmsg_close_array(&b, c);
 393
 394         c = blobmsg_open_table(&b, "memory");
 395         blobmsg_add_u64(&b, "total",
 396                         (uint64_t)info.mem_unit * (uint64_t)info.totalram);
 397         blobmsg_add_u64(&b, "free",
 398                         (uint64_t)info.mem_unit * (uint64_t)info.freeram);
 399         blobmsg_add_u64(&b, "shared",
 400                         (uint64_t)info.mem_unit * (uint64_t)info.sharedram);
 401         blobmsg_add_u64(&b, "buffered",
 402                         (uint64_t)info.mem_unit * (uint64_t)info.bufferram);
 403         blobmsg_add_u64(&b, "available", available);
 404         blobmsg_add_u64(&b, "cached", cached);
 405         blobmsg_close_table(&b, c);
 406
 407         for (i = 0; i < sizeof(fslist) / sizeof(fslist[0]); i += 2) {
 408                 if (statvfs(fslist[i], &s))
 409                         continue;
 410
 411                 c = blobmsg_open_table(&b, fslist[i+1]);
 412
 413                 if (!s.f_frsize)
 414                         s.f_frsize = s.f_bsize;
 415
 416                 blobmsg_add_u64(&b, "total", kscale(s.f_blocks, s.f_frsize));
 417                 blobmsg_add_u64(&b, "free",  kscale(s.f_bfree, s.f_frsize));
 418                 blobmsg_add_u64(&b, "used", kscale(s.f_blocks - s.f_bfree, s.f_frsize));
 419                 blobmsg_add_u64(&b, "avail", kscale(s.f_bavail, s.f_frsize));
 420
 421                 blobmsg_close_table(&b, c);
 422         }
 423
 424         c = blobmsg_open_table(&b, "swap");
 425         blobmsg_add_u64(&b, "total",
 426                         (uint64_t)info.mem_unit * (uint64_t)info.totalswap);
 427         blobmsg_add_u64(&b, "free",
 428                         (uint64_t)info.mem_unit * (uint64_t)info.freeswap);
 429         blobmsg_close_table(&b, c);
 430 #endif
 431
 432         ubus_send_reply(ctx, req, b.head);
 433
 434         return UBUS_STATUS_OK;
 435 }
 436
 437 static int system_reboot(struct ubus_context *ctx, struct ubus_object *obj,
 438                          struct ubus_request_data *req, const char *method,
 439                          struct blob_attr *msg)
 440 {
 441         procd_shutdown(RB_AUTOBOOT);
 442         return 0;
 443 }
 444
 445 enum {
 446         WDT_FREQUENCY,
 447         WDT_TIMEOUT,
 448         WDT_MAGICCLOSE,
 449         WDT_STOP,
 450         __WDT_MAX
 451 };
 452
 453 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 454         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 455         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 456         [WDT_MAGICCLOSE] = { .name = "magicclose", .type = BLOBMSG_TYPE_BOOL },
 457         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 458 };
 459
 460 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 461                         struct ubus_request_data *req, const char *method,
 462                         struct blob_attr *msg)
 463 {
 464         struct blob_attr *tb[__WDT_MAX];
 465         const char *status;
 466
 467         if (!msg)
 468                 return UBUS_STATUS_INVALID_ARGUMENT;
 469
 470         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 471         if (tb[WDT_FREQUENCY]) {
 472                 unsigned int timeout = tb[WDT_TIMEOUT] ? blobmsg_get_u32(tb[WDT_TIMEOUT]) :
 473                                                 watchdog_timeout(0);
 474                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 475
 476                 if (freq) {
 477                         if (freq > timeout / 2)
 478                                 freq = timeout / 2;
 479                         watchdog_frequency(freq);
 480                 }
 481         }
 482
 483         if (tb[WDT_TIMEOUT]) {
 484                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 485                 unsigned int frequency = watchdog_frequency(0);
 486
 487                 if (timeout <= frequency)
 488                         timeout = frequency * 2;
 489                 watchdog_timeout(timeout);
 490         }
 491
 492         if (tb[WDT_MAGICCLOSE])
 493                 watchdog_set_magicclose(blobmsg_get_bool(tb[WDT_MAGICCLOSE]));
 494
 495         if (tb[WDT_STOP])
 496                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 497
 498         if (watchdog_fd() == NULL)
 499                 status = "offline";
 500         else if (watchdog_get_stopped())
 501                 status = "stopped";
 502         else
 503                 status = "running";
 504
 505         blob_buf_init(&b, 0);
 506         blobmsg_add_string(&b, "status", status);
 507         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 508         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 509         blobmsg_add_u8(&b, "magicclose", watchdog_get_magicclose());
 510         ubus_send_reply(ctx, req, b.head);
 511
 512         return 0;
 513 }
 514
 515 enum {
 516         SIGNAL_PID,
 517         SIGNAL_NUM,
 518         __SIGNAL_MAX
 519 };
 520
 521 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
 522         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 523         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 524 };
 525
 526 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 527                         struct ubus_request_data *req, const char *method,
 528                         struct blob_attr *msg)
 529 {
 530         struct blob_attr *tb[__SIGNAL_MAX];
 531
 532         if (!msg)
 533                 return UBUS_STATUS_INVALID_ARGUMENT;
 534
 535         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 536         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 537                 return UBUS_STATUS_INVALID_ARGUMENT;
 538
 539         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 540
 541         return 0;
 542 }
 543
 544 __attribute__((format (printf, 2, 3)))
 545 static enum vjson_state vjson_error(char **b, const char *fmt, ...)
 546 {
 547         static char buf[256] = { 0 };
 548         const char *pfx = "Firmware image couldn't be validated: ";
 549         va_list va;
 550         int r;
 551
 552         r = snprintf(buf, sizeof(buf), "%s", pfx);
 553         if (r < 0) {
 554                 *b = "vjson_error() snprintf failed";
 555                 return VJSON_ERROR;
 556         }
 557
 558         va_start(va, fmt);
 559         r = vsnprintf(buf+r, sizeof(buf)-r, fmt, va);
 560         if (r < 0) {
 561                 *b = "vjson_error() vsnprintf failed";
 562                 return VJSON_ERROR;
 563         }
 564         va_end(va);
 565
 566         *b = buf;
 567         return VJSON_ERROR;
 568 }
 569
 570 static enum vjson_state vjson_parse_token(json_tokener *tok, char *buf, ssize_t len, char **err)
 571 {
 572         json_object *jsobj = NULL;
 573
 574         jsobj = json_tokener_parse_ex(tok, buf, len);
 575         if (json_tokener_get_error(tok) == json_tokener_continue)
 576                 return VJSON_CONTINUE;
 577
 578         if (json_tokener_get_error(tok) == json_tokener_success) {
 579                 if (json_object_get_type(jsobj) != json_type_object) {
 580                         json_object_put(jsobj);
 581                         return vjson_error(err, "result is not an JSON object");
 582                 }
 583
 584                 blobmsg_add_object(&b, jsobj);
 585                 json_object_put(jsobj);
 586                 return VJSON_SUCCESS;
 587         }
 588
 589         return vjson_error(err, "failed to parse JSON: %s (%d)",
 590                            json_tokener_error_desc(json_tokener_get_error(tok)),
 591                            json_tokener_get_error(tok));
 592 }
 593
 594 static enum vjson_state vjson_parse(int fd, char **err)
 595 {
 596         enum vjson_state r = VJSON_ERROR;
 597         size_t read_count = 0;
 598         char buf[64] = { 0 };
 599         json_tokener *tok;
 600         ssize_t len;
 601         int _errno;
 602
 603         tok = json_tokener_new();
 604         if (!tok)
 605                 return vjson_error(err, "json_tokener_new() failed");
 606
 607         vjson_error(err, "incomplete JSON input");
 608
 609         while ((len = read(fd, buf, sizeof(buf)))) {
 610                 if (len < 0 && errno == EINTR)
 611                         continue;
 612
 613                 if (len < 0) {
 614                         _errno = errno;
 615                         json_tokener_free(tok);
 616                         return vjson_error(err, "read() failed: %s (%d)",
 617                                            strerror(_errno), _errno);
 618                 }
 619
 620                 read_count += len;
 621                 r = vjson_parse_token(tok, buf, len, err);
 622                 if (r != VJSON_CONTINUE)
 623                         break;
 624
 625                 memset(buf, 0, sizeof(buf));
 626         }
 627
 628         if (read_count == 0)
 629                 vjson_error(err, "no JSON input");
 630
 631         json_tokener_free(tok);
 632         return r;
 633 }
 634
 635 /**
 636  * validate_firmware_image_call - perform validation & store result in global b
 637  *
 638  * @file: firmware image path
 639  */
 640 static enum vjson_state validate_firmware_image_call(const char *file, char **err)
 641 {
 642         const char *path = "/usr/libexec/validate_firmware_image";
 643         enum vjson_state ret = VJSON_ERROR;
 644         int _errno;
 645         int fds[2];
 646         int fd;
 647
 648         blob_buf_init(&b, 0);
 649         vjson_error(err, "unhandled error");
 650
 651         if (pipe(fds)) {
 652                 _errno = errno;
 653                 return vjson_error(err, "pipe() failed: %s (%d)",
 654                                    strerror(_errno), _errno);
 655         }
 656
 657         switch (fork()) {
 658         case -1:
 659                 _errno = errno;
 660
 661                 close(fds[0]);
 662                 close(fds[1]);
 663
 664                 return vjson_error(err, "fork() failed: %s (%d)",
 665                                    strerror(_errno), _errno);
 666         case 0:
 667                 /* Set stdin & stderr to /dev/null */
 668                 fd = open("/dev/null", O_RDWR);
 669                 if (fd >= 0) {
 670                         dup2(fd, 0);
 671                         dup2(fd, 2);
 672                         close(fd);
 673                 }
 674
 675                 /* Set stdout to the shared pipe */
 676                 dup2(fds[1], 1);
 677                 close(fds[0]);
 678                 close(fds[1]);
 679
 680                 execl(path, path, file, NULL);
 681                 exit(errno);
 682         }
 683
 684         /* Parent process */
 685         close(fds[1]);
 686
 687         ret = vjson_parse(fds[0], err);
 688         close(fds[0]);
 689
 690         return ret;
 691 }
 692
 693 enum {
 694         VALIDATE_FIRMWARE_IMAGE_PATH,
 695         __VALIDATE_FIRMWARE_IMAGE_MAX,
 696 };
 697
 698 static const struct blobmsg_policy validate_firmware_image_policy[__VALIDATE_FIRMWARE_IMAGE_MAX] = {
 699         [VALIDATE_FIRMWARE_IMAGE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 700 };
 701
 702 static int validate_firmware_image(struct ubus_context *ctx,
 703                                    struct ubus_object *obj,
 704                                    struct ubus_request_data *req,
 705                                    const char *method, struct blob_attr *msg)
 706 {
 707         struct blob_attr *tb[__VALIDATE_FIRMWARE_IMAGE_MAX];
 708         enum vjson_state ret = VJSON_ERROR;
 709         char *err;
 710
 711         if (!msg)
 712                 return UBUS_STATUS_INVALID_ARGUMENT;
 713
 714         blobmsg_parse(validate_firmware_image_policy, __VALIDATE_FIRMWARE_IMAGE_MAX, tb, blob_data(msg), blob_len(msg));
 715         if (!tb[VALIDATE_FIRMWARE_IMAGE_PATH])
 716                 return UBUS_STATUS_INVALID_ARGUMENT;
 717
 718         ret = validate_firmware_image_call(blobmsg_get_string(tb[VALIDATE_FIRMWARE_IMAGE_PATH]), &err);
 719         if (ret != VJSON_SUCCESS)
 720                 return UBUS_STATUS_UNKNOWN_ERROR;
 721
 722         ubus_send_reply(ctx, req, b.head);
 723
 724         return UBUS_STATUS_OK;
 725 }
 726
 727 enum {
 728         SYSUPGRADE_PATH,
 729         SYSUPGRADE_FORCE,
 730         SYSUPGRADE_BACKUP,
 731         SYSUPGRADE_PREFIX,
 732         SYSUPGRADE_COMMAND,
 733         SYSUPGRADE_OPTIONS,
 734         __SYSUPGRADE_MAX
 735 };
 736
 737 static const struct blobmsg_policy sysupgrade_policy[__SYSUPGRADE_MAX] = {
 738         [SYSUPGRADE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 739         [SYSUPGRADE_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_BOOL },
 740         [SYSUPGRADE_BACKUP] = { .name = "backup", .type = BLOBMSG_TYPE_STRING },
 741         [SYSUPGRADE_PREFIX] = { .name = "prefix", .type = BLOBMSG_TYPE_STRING },
 742         [SYSUPGRADE_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_STRING },
 743         [SYSUPGRADE_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_TABLE },
 744 };
 745
 746 static void sysupgrade_error(struct ubus_context *ctx,
 747                              struct ubus_request_data *req,
 748                              const char *message)
 749 {
 750         void *c;
 751
 752         blob_buf_init(&b, 0);
 753
 754         c = blobmsg_open_table(&b, "error");
 755         blobmsg_add_string(&b, "message", message);
 756         blobmsg_close_table(&b, c);
 757
 758         ubus_send_reply(ctx, req, b.head);
 759 }
 760
 761 static int sysupgrade(struct ubus_context *ctx, struct ubus_object *obj,
 762                       struct ubus_request_data *req, const char *method,
 763                       struct blob_attr *msg)
 764 {
 765         enum {
 766                 VALIDATION_VALID,
 767                 VALIDATION_FORCEABLE,
 768                 VALIDATION_ALLOW_BACKUP,
 769                 __VALIDATION_MAX
 770         };
 771         static const struct blobmsg_policy validation_policy[__VALIDATION_MAX] = {
 772                 [VALIDATION_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_BOOL },
 773                 [VALIDATION_FORCEABLE] = { .name = "forceable", .type = BLOBMSG_TYPE_BOOL },
 774                 [VALIDATION_ALLOW_BACKUP] = { .name = "allow_backup", .type = BLOBMSG_TYPE_BOOL },
 775         };
 776         struct blob_attr *validation[__VALIDATION_MAX];
 777         struct blob_attr *tb[__SYSUPGRADE_MAX];
 778         bool valid, forceable, allow_backup;
 779         enum vjson_state ret = VJSON_ERROR;
 780         char *err;
 781
 782         if (!msg)
 783                 return UBUS_STATUS_INVALID_ARGUMENT;
 784
 785         blobmsg_parse(sysupgrade_policy, __SYSUPGRADE_MAX, tb, blob_data(msg), blob_len(msg));
 786         if (!tb[SYSUPGRADE_PATH] || !tb[SYSUPGRADE_PREFIX])
 787                 return UBUS_STATUS_INVALID_ARGUMENT;
 788
 789         ret = validate_firmware_image_call(blobmsg_get_string(tb[SYSUPGRADE_PATH]), &err);
 790         if (ret != VJSON_SUCCESS) {
 791                 sysupgrade_error(ctx, req, err);
 792                 return UBUS_STATUS_UNKNOWN_ERROR;
 793         }
 794
 795         blobmsg_parse(validation_policy, __VALIDATION_MAX, validation, blob_data(b.head), blob_len(b.head));
 796
 797         if (!validation[VALIDATION_VALID] || !validation[VALIDATION_FORCEABLE] ||
 798             !validation[VALIDATION_ALLOW_BACKUP]) {
 799                 sysupgrade_error(ctx, req, "Validation script provided invalid input");
 800                 return UBUS_STATUS_INVALID_ARGUMENT;
 801         }
 802
 803         valid = validation[VALIDATION_VALID] && blobmsg_get_bool(validation[VALIDATION_VALID]);
 804         forceable = validation[VALIDATION_FORCEABLE] && blobmsg_get_bool(validation[VALIDATION_FORCEABLE]);
 805         allow_backup = validation[VALIDATION_ALLOW_BACKUP] && blobmsg_get_bool(validation[VALIDATION_ALLOW_BACKUP]);
 806
 807         if (!valid) {
 808                 if (!forceable) {
 809                         sysupgrade_error(ctx, req, "Firmware image is broken and cannot be installed");
 810                         return UBUS_STATUS_NOT_SUPPORTED;
 811                 } else if (!tb[SYSUPGRADE_FORCE] || !blobmsg_get_bool(tb[SYSUPGRADE_FORCE])) {
 812                         sysupgrade_error(ctx, req, "Firmware image is invalid");
 813                         return UBUS_STATUS_NOT_SUPPORTED;
 814                 }
 815         } else if (!allow_backup && tb[SYSUPGRADE_BACKUP]) {
 816                 sysupgrade_error(ctx, req, "Firmware image doesn't allow preserving a backup");
 817                 return UBUS_STATUS_NOT_SUPPORTED;
 818         }
 819
 820         service_stop_all();
 821
 822         sysupgrade_exec_upgraded(blobmsg_get_string(tb[SYSUPGRADE_PREFIX]),
 823                                  blobmsg_get_string(tb[SYSUPGRADE_PATH]),
 824                                  tb[SYSUPGRADE_BACKUP] ? blobmsg_get_string(tb[SYSUPGRADE_BACKUP]) : NULL,
 825                                  tb[SYSUPGRADE_COMMAND] ? blobmsg_get_string(tb[SYSUPGRADE_COMMAND]) : NULL,
 826                                  tb[SYSUPGRADE_OPTIONS]);
 827
 828         /* sysupgrade_exec_upgraded() will never return unless something has gone wrong */
 829         return UBUS_STATUS_UNKNOWN_ERROR;
 830 }
 831
 832 static void
 833 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
 834 {
 835         notify = obj->has_subscribers;
 836 }
 837
 838
 839 static const struct ubus_method system_methods[] = {
 840         UBUS_METHOD_NOARG("board", system_board),
 841         UBUS_METHOD_NOARG("info",  system_info),
 842         UBUS_METHOD_NOARG("reboot", system_reboot),
 843         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 844         UBUS_METHOD("signal", proc_signal, signal_policy),
 845         UBUS_METHOD("validate_firmware_image", validate_firmware_image, validate_firmware_image_policy),
 846         UBUS_METHOD("sysupgrade", sysupgrade, sysupgrade_policy),
 847 };
 848
 849 static struct ubus_object_type system_object_type =
 850         UBUS_OBJECT_TYPE("system", system_methods);
 851
 852 static struct ubus_object system_object = {
 853         .name = "system",
 854         .type = &system_object_type,
 855         .methods = system_methods,
 856         .n_methods = ARRAY_SIZE(system_methods),
 857         .subscribe_cb = procd_subscribe_cb,
 858 };
 859
 860 void
 861 procd_bcast_event(char *event, struct blob_attr *msg)
 862 {
 863         int ret;
 864
 865         if (!notify)
 866                 return;
 867
 868         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
 869         if (ret)
 870                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
 871 }
 872
 873 void ubus_init_system(struct ubus_context *ctx)
 874 {
 875         int ret;
 876
 877         _ctx = ctx;
 878
 879         initramfs = !!getenv("INITRAMFS");
 880         if (initramfs)
 881                 unsetenv("INITRAMFS");
 882
 883         ret = ubus_add_object(ctx, &system_object);
 884         if (ret)
 885                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 886 }