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;
  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                         key = strtok(line, "=\"");
 115                         val = strtok(NULL, "\"\n");
 116
 117                         if (!key || !val)
 118                                 continue;
 119
 120                         if (!strcasecmp(key, "DISTRIB_ID"))
 121                                 blobmsg_add_string(&b, "distribution", val);
 122                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 123                                 blobmsg_add_string(&b, "version", val);
 124                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 125                                 blobmsg_add_string(&b, "revision", val);
 126                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 127                                 blobmsg_add_string(&b, "codename", val);
 128                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 129                                 blobmsg_add_string(&b, "target", val);
 130                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 131                                 blobmsg_add_string(&b, "description", val);
 132                 }
 133
 134                 blobmsg_close_array(&b, c);
 135
 136                 fclose(f);
 137         }
 138
 139         ubus_send_reply(ctx, req, b.head);
 140
 141         return UBUS_STATUS_OK;
 142 }
 143
 144 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 145                 struct ubus_request_data *req, const char *method,
 146                 struct blob_attr *msg)
 147 {
 148         void *c;
 149         time_t now;
 150         struct tm *tm;
 151         struct sysinfo info;
 152
 153         now = time(NULL);
 154
 155         if (!(tm = localtime(&now)))
 156                 return UBUS_STATUS_UNKNOWN_ERROR;
 157
 158         if (sysinfo(&info))
 159                 return UBUS_STATUS_UNKNOWN_ERROR;
 160
 161         blob_buf_init(&b, 0);
 162
 163         blobmsg_add_u32(&b, "uptime",    info.uptime);
 164         blobmsg_add_u32(&b, "localtime", mktime(tm));
 165
 166         c = blobmsg_open_array(&b, "load");
 167         blobmsg_add_u32(&b, NULL, info.loads[0]);
 168         blobmsg_add_u32(&b, NULL, info.loads[1]);
 169         blobmsg_add_u32(&b, NULL, info.loads[2]);
 170         blobmsg_close_array(&b, c);
 171
 172         c = blobmsg_open_table(&b, "memory");
 173         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalram);
 174         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeram);
 175         blobmsg_add_u32(&b, "shared",   info.mem_unit * info.sharedram);
 176         blobmsg_add_u32(&b, "buffered", info.mem_unit * info.bufferram);
 177         blobmsg_close_table(&b, c);
 178
 179         c = blobmsg_open_table(&b, "swap");
 180         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalswap);
 181         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeswap);
 182         blobmsg_close_table(&b, c);
 183
 184         ubus_send_reply(ctx, req, b.head);
 185
 186         return UBUS_STATUS_OK;
 187 }
 188
 189 static int system_upgrade(struct ubus_context *ctx, struct ubus_object *obj,
 190                         struct ubus_request_data *req, const char *method,
 191                         struct blob_attr *msg)
 192 {
 193         upgrade_running = 1;
 194         return 0;
 195 }
 196
 197 enum {
 198         WDT_FREQUENCY,
 199         WDT_TIMEOUT,
 200         WDT_STOP,
 201         __WDT_MAX
 202 };
 203
 204 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 205         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 206         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 207         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 208 };
 209
 210 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 211                         struct ubus_request_data *req, const char *method,
 212                         struct blob_attr *msg)
 213 {
 214         struct blob_attr *tb[__WDT_MAX];
 215         const char *status;
 216
 217         if (!msg)
 218                 return UBUS_STATUS_INVALID_ARGUMENT;
 219
 220         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 221         if (tb[WDT_FREQUENCY]) {
 222                 unsigned int timeout = watchdog_timeout(0);
 223                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 224
 225                 if (freq) {
 226                         if (freq > timeout / 2)
 227                                 freq = timeout / 2;
 228                         watchdog_frequency(freq);
 229                 }
 230         }
 231
 232         if (tb[WDT_TIMEOUT]) {
 233                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 234                 unsigned int frequency = watchdog_frequency(0);
 235
 236                 if (timeout <= frequency)
 237                         timeout = frequency * 2;
 238                  watchdog_timeout(timeout);
 239         }
 240
 241         if (tb[WDT_STOP])
 242                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 243
 244         if (watchdog_fd() < 0)
 245                 status = "offline";
 246         else if (watchdog_get_stopped())
 247                 status = "stopped";
 248         else
 249                 status = "running";
 250
 251         blob_buf_init(&b, 0);
 252         blobmsg_add_string(&b, "status", status);
 253         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 254         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 255         ubus_send_reply(ctx, req, b.head);
 256
 257         return 0;
 258 }
 259
 260 enum {
 261         SIGNAL_PID,
 262         SIGNAL_NUM,
 263         __SIGNAL_MAX
 264 };
 265
 266 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
 267         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 268         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 269 };
 270
 271 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 272                         struct ubus_request_data *req, const char *method,
 273                         struct blob_attr *msg)
 274 {
 275         struct blob_attr *tb[__SIGNAL_MAX];
 276
 277         if (!msg)
 278                 return UBUS_STATUS_INVALID_ARGUMENT;
 279
 280         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 281         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 282                 return UBUS_STATUS_INVALID_ARGUMENT;
 283
 284         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 285
 286         return 0;
 287 }
 288
 289 static void
 290 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
 291 {
 292         notify = obj->has_subscribers;
 293 }
 294
 295 static const struct ubus_method system_methods[] = {
 296         UBUS_METHOD_NOARG("board", system_board),
 297         UBUS_METHOD_NOARG("info",  system_info),
 298         UBUS_METHOD_NOARG("upgrade", system_upgrade),
 299         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 300         UBUS_METHOD("signal", proc_signal, signal_policy),
 301 };
 302
 303 static struct ubus_object_type system_object_type =
 304         UBUS_OBJECT_TYPE("system", system_methods);
 305
 306 static struct ubus_object system_object = {
 307         .name = "system",
 308         .type = &system_object_type,
 309         .methods = system_methods,
 310         .n_methods = ARRAY_SIZE(system_methods),
 311         .subscribe_cb = procd_subscribe_cb,
 312 };
 313
 314 void
 315 procd_bcast_event(char *event, struct blob_attr *msg)
 316 {
 317         int ret;
 318
 319         if (!notify)
 320                 return;
 321
 322         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
 323         if (ret)
 324                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
 325 }
 326
 327 void ubus_init_system(struct ubus_context *ctx)
 328 {
 329         int ret;
 330
 331         _ctx = ctx;
 332         ret = ubus_add_object(ctx, &system_object);
 333         if (ret)
 334                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 335 }