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