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