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         size_t len = 0;
  55         bool found = false;
  56
  57         if (initramfs)
  58                 return "initramfs";
  59
  60         if (fstype[0])
  61                 return fstype;
  62
  63         mounts = fopen(proc_mounts, "r");
  64         if (!mounts)
  65                 return NULL;
  66
  67         while (getline(&mountstr, &len, mounts) != -1) {
  68                 pos = strchr(mountstr, ' ');
  69                 if (!pos)
  70                         continue;
  71
  72                 tmp = pos + 1;
  73                 pos = strchr(tmp, ' ');
  74                 if (!pos)
  75                         continue;
  76
  77                 *pos = '\0';
  78                 if (strcmp(tmp, mp))
  79                         continue;
  80
  81                 tmp = pos + 1;
  82                 pos = strchr(tmp, ' ');
  83                 if (!pos)
  84                         continue;
  85
  86                 *pos = '\0';
  87
  88                 if (!strcmp(tmp, "overlay")) {
  89                         /*
  90                          * there is no point in parsing overlay option string for
  91                          * lowerdir, as that can point to "/" being a previous
  92                          * overlay mount (after firstboot or sysuprade config
  93                          * restore). Hence just assume the lowerdir is "/rom" and
  94                          * restart searching for that instead if that's not
  95                          * already the case.
  96                          */
  97                         if (!strcmp(mp, "/rom"))
  98                                 break;
  99
 100                         mp = "/rom";
 101                         fseek(mounts, 0, SEEK_SET);
 102                         continue;
 103                 }
 104
 105                 found = true;
 106                 break;
 107         }
 108
 109         if (found)
 110                 strncpy(fstype, tmp, sizeof(fstype) - 1);
 111
 112         fstype[sizeof(fstype) - 1]= '\0';
 113         free(mountstr);
 114         fclose(mounts);
 115
 116         if (found)
 117                 return fstype;
 118         else
 119                 return NULL;
 120 }
 121
 122 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
 123                  struct ubus_request_data *req, const char *method,
 124                  struct blob_attr *msg)
 125 {
 126         void *c;
 127         char line[256];
 128         char *key, *val, *next;
 129         const char *rootfs_type = system_rootfs_type();
 130         struct utsname utsname;
 131         FILE *f;
 132
 133         blob_buf_init(&b, 0);
 134
 135         if (uname(&utsname) >= 0)
 136         {
 137                 blobmsg_add_string(&b, "kernel", utsname.release);
 138                 blobmsg_add_string(&b, "hostname", utsname.nodename);
 139         }
 140
 141         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
 142         {
 143                 while(fgets(line, sizeof(line), f))
 144                 {
 145                         key = strtok(line, "\t:");
 146                         val = strtok(NULL, "\t\n");
 147
 148                         if (!key || !val)
 149                                 continue;
 150
 151 #ifdef __aarch64__
 152                         if (!strcasecmp(key, "CPU revision")) {
 153                                 snprintf(line, sizeof(line), "ARMv8 Processor rev %lu", strtoul(val + 2, NULL, 16));
 154                                 blobmsg_add_string(&b, "system", line);
 155                                 break;
 156                         }
 157 #elif __riscv
 158                         if (!strcasecmp(key, "isa")) {
 159                                 snprintf(line, sizeof(line), "RISC-V (%s)", val + 2);
 160                                 blobmsg_add_string(&b, "system", line);
 161                                 break;
 162                         }
 163 #else
 164                         if (!strcasecmp(key, "system type") ||
 165                             !strcasecmp(key, "processor") ||
 166                             !strcasecmp(key, "cpu") ||
 167                             !strcasecmp(key, "model name"))
 168                         {
 169                                 strtoul(val + 2, &key, 0);
 170
 171                                 if (key == (val + 2) || *key != 0)
 172                                 {
 173                                         blobmsg_add_string(&b, "system", val + 2);
 174                                         break;
 175                                 }
 176                         }
 177 #endif
 178                 }
 179
 180                 fclose(f);
 181         }
 182
 183         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL ||
 184             (f = fopen("/proc/device-tree/model", "r")) != NULL)
 185         {
 186                 if (fgets(line, sizeof(line), f))
 187                 {
 188                         val = strtok(line, "\t\n");
 189
 190                         if (val)
 191                                 blobmsg_add_string(&b, "model", val);
 192                 }
 193
 194                 fclose(f);
 195         }
 196         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
 197         {
 198                 while(fgets(line, sizeof(line), f))
 199                 {
 200                         key = strtok(line, "\t:");
 201                         val = strtok(NULL, "\t\n");
 202
 203                         if (!key || !val)
 204                                 continue;
 205
 206                         if (!strcasecmp(key, "machine") ||
 207                             !strcasecmp(key, "hardware"))
 208                         {
 209                                 blobmsg_add_string(&b, "model", val + 2);
 210                                 break;
 211                         }
 212                 }
 213
 214                 fclose(f);
 215         }
 216
 217         if ((f = fopen("/tmp/sysinfo/board_name", "r")) != NULL)
 218         {
 219                 if (fgets(line, sizeof(line), f))
 220                 {
 221                         val = strtok(line, "\t\n");
 222
 223                         if (val)
 224                                 blobmsg_add_string(&b, "board_name", val);
 225                 }
 226
 227                 fclose(f);
 228         }
 229         else if ((f = fopen("/proc/device-tree/compatible", "r")) != NULL)
 230         {
 231                 if (fgets(line, sizeof(line), f))
 232                 {
 233                         val = strtok(line, "\t\n");
 234
 235                         if (val)
 236                         {
 237                                 next = val;
 238                                 while ((next = strchr(next, ',')) != NULL)
 239                                 {
 240                                         *next = '-';
 241                                         next++;
 242                                 }
 243
 244                                 blobmsg_add_string(&b, "board_name", val);
 245                         }
 246                 }
 247
 248                 fclose(f);
 249         }
 250
 251         if (rootfs_type)
 252                 blobmsg_add_string(&b, "rootfs_type", rootfs_type);
 253
 254         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 255         {
 256                 c = blobmsg_open_table(&b, "release");
 257
 258                 while (fgets(line, sizeof(line), f))
 259                 {
 260                         char *dest;
 261                         char ch;
 262
 263                         key = line;
 264                         val = strchr(line, '=');
 265                         if (!val)
 266                                 continue;
 267
 268                         *(val++) = 0;
 269
 270                         if (!strcasecmp(key, "DISTRIB_ID"))
 271                                 key = "distribution";
 272                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 273                                 key = "version";
 274                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 275                                 key = "revision";
 276                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 277                                 key = "codename";
 278                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 279                                 key = "target";
 280                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 281                                 key = "description";
 282                         else
 283                                 continue;
 284
 285                         dest = blobmsg_alloc_string_buffer(&b, key, strlen(val));
 286                         if (!dest) {
 287                                 ERROR("Failed to allocate blob.\n");
 288                                 continue;
 289                         }
 290
 291                         while (val && (ch = *(val++)) != 0) {
 292                                 switch (ch) {
 293                                 case '\'':
 294                                 case '"':
 295                                         next = strchr(val, ch);
 296                                         if (next)
 297                                                 *next = 0;
 298
 299                                         strcpy(dest, val);
 300
 301                                         if (next)
 302                                                 val = next + 1;
 303
 304                                         dest += strlen(dest);
 305                                         break;
 306                                 case '\\':
 307                                         *(dest++) = *(val++);
 308                                         break;
 309                                 }
 310                         }
 311                         blobmsg_add_string_buffer(&b);
 312                 }
 313
 314                 blobmsg_close_array(&b, c);
 315
 316                 fclose(f);
 317         }
 318
 319         ubus_send_reply(ctx, req, b.head);
 320
 321         return UBUS_STATUS_OK;
 322 }
 323
 324 static unsigned long
 325 kscale(unsigned long b, unsigned long bs)
 326 {
 327         return (b * (unsigned long long) bs + 1024/2) / 1024;
 328 }
 329
 330 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 331                 struct ubus_request_data *req, const char *method,
 332                 struct blob_attr *msg)
 333 {
 334         time_t now;
 335         struct tm *tm;
 336 #ifdef linux
 337         struct sysinfo info;
 338         void *c;
 339         char line[256];
 340         char *key, *val;
 341         unsigned long long available, cached;
 342         FILE *f;
 343         int i;
 344         struct statvfs s;
 345         const char *fslist[] = {
 346                 "/",    "root",
 347                 "/tmp", "tmp",
 348         };
 349
 350         if (sysinfo(&info))
 351                 return UBUS_STATUS_UNKNOWN_ERROR;
 352
 353         if ((f = fopen("/proc/meminfo", "r")) == NULL)
 354                 return UBUS_STATUS_UNKNOWN_ERROR;
 355
 356         /* if linux < 3.14 MemAvailable is not in meminfo */
 357         available = 0;
 358         cached = 0;
 359
 360         while (fgets(line, sizeof(line), f))
 361         {
 362                 key = strtok(line, " :");
 363                 val = strtok(NULL, " ");
 364
 365                 if (!key || !val)
 366                         continue;
 367
 368                 if (!strcasecmp(key, "MemAvailable"))
 369                         available = 1024 * atoll(val);
 370                 else if (!strcasecmp(key, "Cached"))
 371                         cached = 1024 * atoll(val);
 372         }
 373
 374         fclose(f);
 375 #endif
 376
 377         now = time(NULL);
 378
 379         if (!(tm = localtime(&now)))
 380                 return UBUS_STATUS_UNKNOWN_ERROR;
 381
 382         blob_buf_init(&b, 0);
 383
 384         blobmsg_add_u32(&b, "localtime", now + tm->tm_gmtoff);
 385
 386 #ifdef linux
 387         blobmsg_add_u32(&b, "uptime",    info.uptime);
 388
 389         c = blobmsg_open_array(&b, "load");
 390         blobmsg_add_u32(&b, NULL, info.loads[0]);
 391         blobmsg_add_u32(&b, NULL, info.loads[1]);
 392         blobmsg_add_u32(&b, NULL, info.loads[2]);
 393         blobmsg_close_array(&b, c);
 394
 395         c = blobmsg_open_table(&b, "memory");
 396         blobmsg_add_u64(&b, "total",
 397                         (uint64_t)info.mem_unit * (uint64_t)info.totalram);
 398         blobmsg_add_u64(&b, "free",
 399                         (uint64_t)info.mem_unit * (uint64_t)info.freeram);
 400         blobmsg_add_u64(&b, "shared",
 401                         (uint64_t)info.mem_unit * (uint64_t)info.sharedram);
 402         blobmsg_add_u64(&b, "buffered",
 403                         (uint64_t)info.mem_unit * (uint64_t)info.bufferram);
 404         blobmsg_add_u64(&b, "available", available);
 405         blobmsg_add_u64(&b, "cached", cached);
 406         blobmsg_close_table(&b, c);
 407
 408         for (i = 0; i < sizeof(fslist) / sizeof(fslist[0]); i += 2) {
 409                 if (statvfs(fslist[i], &s))
 410                         continue;
 411
 412                 c = blobmsg_open_table(&b, fslist[i+1]);
 413
 414                 if (!s.f_frsize)
 415                         s.f_frsize = s.f_bsize;
 416
 417                 blobmsg_add_u64(&b, "total", kscale(s.f_blocks, s.f_frsize));
 418                 blobmsg_add_u64(&b, "free",  kscale(s.f_bfree, s.f_frsize));
 419                 blobmsg_add_u64(&b, "used", kscale(s.f_blocks - s.f_bfree, s.f_frsize));
 420                 blobmsg_add_u64(&b, "avail", kscale(s.f_bavail, s.f_frsize));
 421
 422                 blobmsg_close_table(&b, c);
 423         }
 424
 425         c = blobmsg_open_table(&b, "swap");
 426         blobmsg_add_u64(&b, "total",
 427                         (uint64_t)info.mem_unit * (uint64_t)info.totalswap);
 428         blobmsg_add_u64(&b, "free",
 429                         (uint64_t)info.mem_unit * (uint64_t)info.freeswap);
 430         blobmsg_close_table(&b, c);
 431 #endif
 432
 433         ubus_send_reply(ctx, req, b.head);
 434
 435         return UBUS_STATUS_OK;
 436 }
 437
 438 static int system_reboot(struct ubus_context *ctx, struct ubus_object *obj,
 439                          struct ubus_request_data *req, const char *method,
 440                          struct blob_attr *msg)
 441 {
 442         procd_shutdown(RB_AUTOBOOT);
 443         return 0;
 444 }
 445
 446 enum {
 447         WDT_FREQUENCY,
 448         WDT_TIMEOUT,
 449         WDT_MAGICCLOSE,
 450         WDT_STOP,
 451         __WDT_MAX
 452 };
 453
 454 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 455         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 456         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 457         [WDT_MAGICCLOSE] = { .name = "magicclose", .type = BLOBMSG_TYPE_BOOL },
 458         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 459 };
 460
 461 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 462                         struct ubus_request_data *req, const char *method,
 463                         struct blob_attr *msg)
 464 {
 465         struct blob_attr *tb[__WDT_MAX];
 466         const char *status;
 467
 468         if (!msg)
 469                 return UBUS_STATUS_INVALID_ARGUMENT;
 470
 471         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 472         if (tb[WDT_FREQUENCY]) {
 473                 unsigned int timeout = tb[WDT_TIMEOUT] ? blobmsg_get_u32(tb[WDT_TIMEOUT]) :
 474                                                 watchdog_timeout(0);
 475                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 476
 477                 if (freq) {
 478                         if (freq > timeout / 2)
 479                                 freq = timeout / 2;
 480                         watchdog_frequency(freq);
 481                 }
 482         }
 483
 484         if (tb[WDT_TIMEOUT]) {
 485                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 486                 unsigned int frequency = watchdog_frequency(0);
 487
 488                 if (timeout <= frequency)
 489                         timeout = frequency * 2;
 490                 watchdog_timeout(timeout);
 491         }
 492
 493         if (tb[WDT_MAGICCLOSE])
 494                 watchdog_set_magicclose(blobmsg_get_bool(tb[WDT_MAGICCLOSE]));
 495
 496         if (tb[WDT_STOP])
 497                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 498
 499         if (watchdog_fd() == NULL)
 500                 status = "offline";
 501         else if (watchdog_get_stopped())
 502                 status = "stopped";
 503         else
 504                 status = "running";
 505
 506         blob_buf_init(&b, 0);
 507         blobmsg_add_string(&b, "status", status);
 508         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 509         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 510         blobmsg_add_u8(&b, "magicclose", watchdog_get_magicclose());
 511         ubus_send_reply(ctx, req, b.head);
 512
 513         return 0;
 514 }
 515
 516 enum {
 517         SIGNAL_PID,
 518         SIGNAL_NUM,
 519         __SIGNAL_MAX
 520 };
 521
 522 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
 523         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 524         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 525 };
 526
 527 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 528                         struct ubus_request_data *req, const char *method,
 529                         struct blob_attr *msg)
 530 {
 531         struct blob_attr *tb[__SIGNAL_MAX];
 532
 533         if (!msg)
 534                 return UBUS_STATUS_INVALID_ARGUMENT;
 535
 536         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 537         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 538                 return UBUS_STATUS_INVALID_ARGUMENT;
 539
 540         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 541
 542         return 0;
 543 }
 544
 545 __attribute__((format (printf, 2, 3)))
 546 static enum vjson_state vjson_error(char **b, const char *fmt, ...)
 547 {
 548         static char buf[256] = { 0 };
 549         const char *pfx = "Firmware image couldn't be validated: ";
 550         va_list va;
 551         int r;
 552
 553         r = snprintf(buf, sizeof(buf), "%s", pfx);
 554         if (r < 0) {
 555                 *b = "vjson_error() snprintf failed";
 556                 return VJSON_ERROR;
 557         }
 558
 559         va_start(va, fmt);
 560         r = vsnprintf(buf+r, sizeof(buf)-r, fmt, va);
 561         if (r < 0) {
 562                 *b = "vjson_error() vsnprintf failed";
 563                 return VJSON_ERROR;
 564         }
 565         va_end(va);
 566
 567         *b = buf;
 568         return VJSON_ERROR;
 569 }
 570
 571 static enum vjson_state vjson_parse_token(json_tokener *tok, char *buf, ssize_t len, char **err)
 572 {
 573         json_object *jsobj = NULL;
 574
 575         jsobj = json_tokener_parse_ex(tok, buf, len);
 576         if (json_tokener_get_error(tok) == json_tokener_continue)
 577                 return VJSON_CONTINUE;
 578
 579         if (json_tokener_get_error(tok) == json_tokener_success) {
 580                 if (json_object_get_type(jsobj) != json_type_object) {
 581                         json_object_put(jsobj);
 582                         return vjson_error(err, "result is not an JSON object");
 583                 }
 584
 585                 blobmsg_add_object(&b, jsobj);
 586                 json_object_put(jsobj);
 587                 return VJSON_SUCCESS;
 588         }
 589
 590         return vjson_error(err, "failed to parse JSON: %s (%d)",
 591                            json_tokener_error_desc(json_tokener_get_error(tok)),
 592                            json_tokener_get_error(tok));
 593 }
 594
 595 static enum vjson_state vjson_parse(int fd, char **err)
 596 {
 597         enum vjson_state r = VJSON_ERROR;
 598         size_t read_count = 0;
 599         char buf[64] = { 0 };
 600         json_tokener *tok;
 601         ssize_t len;
 602         int _errno;
 603
 604         tok = json_tokener_new();
 605         if (!tok)
 606                 return vjson_error(err, "json_tokener_new() failed");
 607
 608         vjson_error(err, "incomplete JSON input");
 609
 610         while ((len = read(fd, buf, sizeof(buf)))) {
 611                 if (len < 0 && errno == EINTR)
 612                         continue;
 613
 614                 if (len < 0) {
 615                         _errno = errno;
 616                         json_tokener_free(tok);
 617                         return vjson_error(err, "read() failed: %s (%d)",
 618                                            strerror(_errno), _errno);
 619                 }
 620
 621                 read_count += len;
 622                 r = vjson_parse_token(tok, buf, len, err);
 623                 if (r != VJSON_CONTINUE)
 624                         break;
 625
 626                 memset(buf, 0, sizeof(buf));
 627         }
 628
 629         if (read_count == 0)
 630                 vjson_error(err, "no JSON input");
 631
 632         json_tokener_free(tok);
 633         return r;
 634 }
 635
 636 /**
 637  * validate_firmware_image_call - perform validation & store result in global b
 638  *
 639  * @file: firmware image path
 640  */
 641 static enum vjson_state validate_firmware_image_call(const char *file, char **err)
 642 {
 643         const char *path = "/usr/libexec/validate_firmware_image";
 644         enum vjson_state ret = VJSON_ERROR;
 645         int _errno;
 646         int fds[2];
 647         int fd;
 648
 649         blob_buf_init(&b, 0);
 650         vjson_error(err, "unhandled error");
 651
 652         if (pipe(fds)) {
 653                 _errno = errno;
 654                 return vjson_error(err, "pipe() failed: %s (%d)",
 655                                    strerror(_errno), _errno);
 656         }
 657
 658         switch (fork()) {
 659         case -1:
 660                 _errno = errno;
 661
 662                 close(fds[0]);
 663                 close(fds[1]);
 664
 665                 return vjson_error(err, "fork() failed: %s (%d)",
 666                                    strerror(_errno), _errno);
 667         case 0:
 668                 /* Set stdin & stderr to /dev/null */
 669                 fd = open("/dev/null", O_RDWR);
 670                 if (fd >= 0) {
 671                         dup2(fd, 0);
 672                         dup2(fd, 2);
 673                         close(fd);
 674                 }
 675
 676                 /* Set stdout to the shared pipe */
 677                 dup2(fds[1], 1);
 678                 close(fds[0]);
 679                 close(fds[1]);
 680
 681                 execl(path, path, file, NULL);
 682                 exit(errno);
 683         }
 684
 685         /* Parent process */
 686         close(fds[1]);
 687
 688         ret = vjson_parse(fds[0], err);
 689         close(fds[0]);
 690
 691         return ret;
 692 }
 693
 694 enum {
 695         VALIDATE_FIRMWARE_IMAGE_PATH,
 696         __VALIDATE_FIRMWARE_IMAGE_MAX,
 697 };
 698
 699 static const struct blobmsg_policy validate_firmware_image_policy[__VALIDATE_FIRMWARE_IMAGE_MAX] = {
 700         [VALIDATE_FIRMWARE_IMAGE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 701 };
 702
 703 static int validate_firmware_image(struct ubus_context *ctx,
 704                                    struct ubus_object *obj,
 705                                    struct ubus_request_data *req,
 706                                    const char *method, struct blob_attr *msg)
 707 {
 708         struct blob_attr *tb[__VALIDATE_FIRMWARE_IMAGE_MAX];
 709         enum vjson_state ret = VJSON_ERROR;
 710         char *err;
 711
 712         if (!msg)
 713                 return UBUS_STATUS_INVALID_ARGUMENT;
 714
 715         blobmsg_parse(validate_firmware_image_policy, __VALIDATE_FIRMWARE_IMAGE_MAX, tb, blob_data(msg), blob_len(msg));
 716         if (!tb[VALIDATE_FIRMWARE_IMAGE_PATH])
 717                 return UBUS_STATUS_INVALID_ARGUMENT;
 718
 719         ret = validate_firmware_image_call(blobmsg_get_string(tb[VALIDATE_FIRMWARE_IMAGE_PATH]), &err);
 720         if (ret != VJSON_SUCCESS)
 721                 return UBUS_STATUS_UNKNOWN_ERROR;
 722
 723         ubus_send_reply(ctx, req, b.head);
 724
 725         return UBUS_STATUS_OK;
 726 }
 727
 728 enum {
 729         SYSUPGRADE_PATH,
 730         SYSUPGRADE_FORCE,
 731         SYSUPGRADE_BACKUP,
 732         SYSUPGRADE_PREFIX,
 733         SYSUPGRADE_COMMAND,
 734         SYSUPGRADE_OPTIONS,
 735         __SYSUPGRADE_MAX
 736 };
 737
 738 static const struct blobmsg_policy sysupgrade_policy[__SYSUPGRADE_MAX] = {
 739         [SYSUPGRADE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 740         [SYSUPGRADE_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_BOOL },
 741         [SYSUPGRADE_BACKUP] = { .name = "backup", .type = BLOBMSG_TYPE_STRING },
 742         [SYSUPGRADE_PREFIX] = { .name = "prefix", .type = BLOBMSG_TYPE_STRING },
 743         [SYSUPGRADE_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_STRING },
 744         [SYSUPGRADE_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_TABLE },
 745 };
 746
 747 static void sysupgrade_error(struct ubus_context *ctx,
 748                              struct ubus_request_data *req,
 749                              const char *message)
 750 {
 751         void *c;
 752
 753         blob_buf_init(&b, 0);
 754
 755         c = blobmsg_open_table(&b, "error");
 756         blobmsg_add_string(&b, "message", message);
 757         blobmsg_close_table(&b, c);
 758
 759         ubus_send_reply(ctx, req, b.head);
 760 }
 761
 762 static int sysupgrade(struct ubus_context *ctx, struct ubus_object *obj,
 763                       struct ubus_request_data *req, const char *method,
 764                       struct blob_attr *msg)
 765 {
 766         enum {
 767                 VALIDATION_VALID,
 768                 VALIDATION_FORCEABLE,
 769                 VALIDATION_ALLOW_BACKUP,
 770                 __VALIDATION_MAX
 771         };
 772         static const struct blobmsg_policy validation_policy[__VALIDATION_MAX] = {
 773                 [VALIDATION_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_BOOL },
 774                 [VALIDATION_FORCEABLE] = { .name = "forceable", .type = BLOBMSG_TYPE_BOOL },
 775                 [VALIDATION_ALLOW_BACKUP] = { .name = "allow_backup", .type = BLOBMSG_TYPE_BOOL },
 776         };
 777         struct blob_attr *validation[__VALIDATION_MAX];
 778         struct blob_attr *tb[__SYSUPGRADE_MAX];
 779         bool valid, forceable, allow_backup;
 780         enum vjson_state ret = VJSON_ERROR;
 781         char *err;
 782
 783         if (!msg)
 784                 return UBUS_STATUS_INVALID_ARGUMENT;
 785
 786         blobmsg_parse(sysupgrade_policy, __SYSUPGRADE_MAX, tb, blob_data(msg), blob_len(msg));
 787         if (!tb[SYSUPGRADE_PATH] || !tb[SYSUPGRADE_PREFIX])
 788                 return UBUS_STATUS_INVALID_ARGUMENT;
 789
 790         ret = validate_firmware_image_call(blobmsg_get_string(tb[SYSUPGRADE_PATH]), &err);
 791         if (ret != VJSON_SUCCESS) {
 792                 sysupgrade_error(ctx, req, err);
 793                 return UBUS_STATUS_UNKNOWN_ERROR;
 794         }
 795
 796         blobmsg_parse(validation_policy, __VALIDATION_MAX, validation, blob_data(b.head), blob_len(b.head));
 797
 798         if (!validation[VALIDATION_VALID] || !validation[VALIDATION_FORCEABLE] ||
 799             !validation[VALIDATION_ALLOW_BACKUP]) {
 800                 sysupgrade_error(ctx, req, "Validation script provided invalid input");
 801                 return UBUS_STATUS_INVALID_ARGUMENT;
 802         }
 803
 804         valid = validation[VALIDATION_VALID] && blobmsg_get_bool(validation[VALIDATION_VALID]);
 805         forceable = validation[VALIDATION_FORCEABLE] && blobmsg_get_bool(validation[VALIDATION_FORCEABLE]);
 806         allow_backup = validation[VALIDATION_ALLOW_BACKUP] && blobmsg_get_bool(validation[VALIDATION_ALLOW_BACKUP]);
 807
 808         if (!valid) {
 809                 if (!forceable) {
 810                         sysupgrade_error(ctx, req, "Firmware image is broken and cannot be installed");
 811                         return UBUS_STATUS_NOT_SUPPORTED;
 812                 } else if (!tb[SYSUPGRADE_FORCE] || !blobmsg_get_bool(tb[SYSUPGRADE_FORCE])) {
 813                         sysupgrade_error(ctx, req, "Firmware image is invalid");
 814                         return UBUS_STATUS_NOT_SUPPORTED;
 815                 }
 816         } else if (!allow_backup && tb[SYSUPGRADE_BACKUP]) {
 817                 sysupgrade_error(ctx, req, "Firmware image doesn't allow preserving a backup");
 818                 return UBUS_STATUS_NOT_SUPPORTED;
 819         }
 820
 821         service_stop_all();
 822
 823         sysupgrade_exec_upgraded(blobmsg_get_string(tb[SYSUPGRADE_PREFIX]),
 824                                  blobmsg_get_string(tb[SYSUPGRADE_PATH]),
 825                                  tb[SYSUPGRADE_BACKUP] ? blobmsg_get_string(tb[SYSUPGRADE_BACKUP]) : NULL,
 826                                  tb[SYSUPGRADE_COMMAND] ? blobmsg_get_string(tb[SYSUPGRADE_COMMAND]) : NULL,
 827                                  tb[SYSUPGRADE_OPTIONS]);
 828
 829         /* sysupgrade_exec_upgraded() will never return unless something has gone wrong */
 830         return UBUS_STATUS_UNKNOWN_ERROR;
 831 }
 832
 833 static void
 834 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
 835 {
 836         notify = obj->has_subscribers;
 837 }
 838
 839
 840 static const struct ubus_method system_methods[] = {
 841         UBUS_METHOD_NOARG("board", system_board),
 842         UBUS_METHOD_NOARG("info",  system_info),
 843         UBUS_METHOD_NOARG("reboot", system_reboot),
 844         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 845         UBUS_METHOD("signal", proc_signal, signal_policy),
 846         UBUS_METHOD("validate_firmware_image", validate_firmware_image, validate_firmware_image_policy),
 847         UBUS_METHOD("sysupgrade", sysupgrade, sysupgrade_policy),
 848 };
 849
 850 static struct ubus_object_type system_object_type =
 851         UBUS_OBJECT_TYPE("system", system_methods);
 852
 853 static struct ubus_object system_object = {
 854         .name = "system",
 855         .type = &system_object_type,
 856         .methods = system_methods,
 857         .n_methods = ARRAY_SIZE(system_methods),
 858         .subscribe_cb = procd_subscribe_cb,
 859 };
 860
 861 void
 862 procd_bcast_event(char *event, struct blob_attr *msg)
 863 {
 864         int ret;
 865
 866         if (!notify)
 867                 return;
 868
 869         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
 870         if (ret)
 871                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
 872 }
 873
 874 void ubus_init_system(struct ubus_context *ctx)
 875 {
 876         int ret;
 877
 878         _ctx = ctx;
 879
 880         initramfs = !!getenv("INITRAMFS");
 881         if (initramfs)
 882                 unsetenv("INITRAMFS");
 883
 884         ret = ubus_add_object(ctx, &system_object);
 885         if (ret)
 886                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 887 }