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