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