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 #include "hotplug.h"
  29
  30 static struct blob_buf b;
  31
  32 int upgrade_running = 0;
  33
  34 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
  35                  struct ubus_request_data *req, const char *method,
  36                  struct blob_attr *msg)
  37 {
  38         void *c;
  39         char line[256];
  40         char *key, *val;
  41         struct utsname utsname;
  42         FILE *f;
  43
  44         blob_buf_init(&b, 0);
  45
  46         if (uname(&utsname) >= 0)
  47         {
  48                 blobmsg_add_string(&b, "kernel", utsname.release);
  49                 blobmsg_add_string(&b, "hostname", utsname.nodename);
  50         }
  51
  52         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  53         {
  54                 while(fgets(line, sizeof(line), f))
  55                 {
  56                         key = strtok(line, "\t:");
  57                         val = strtok(NULL, "\t\n");
  58
  59                         if (!key || !val)
  60                                 continue;
  61
  62                         if (!strcasecmp(key, "system type") ||
  63                             !strcasecmp(key, "processor") ||
  64                             !strcasecmp(key, "model name"))
  65                         {
  66                                 blobmsg_add_string(&b, "system", val + 2);
  67                                 break;
  68                         }
  69                 }
  70
  71                 fclose(f);
  72         }
  73
  74         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL)
  75         {
  76                 if (fgets(line, sizeof(line), f))
  77                 {
  78                         val = strtok(line, "\t\n");
  79
  80                         if (val)
  81                                 blobmsg_add_string(&b, "model", val);
  82                 }
  83
  84                 fclose(f);
  85         }
  86         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  87         {
  88                 while(fgets(line, sizeof(line), f))
  89                 {
  90                         key = strtok(line, "\t:");
  91                         val = strtok(NULL, "\t\n");
  92
  93                         if (!key || !val)
  94                                 continue;
  95
  96                         if (!strcasecmp(key, "machine") ||
  97                             !strcasecmp(key, "hardware"))
  98                         {
  99                                 blobmsg_add_string(&b, "model", val + 2);
 100                                 break;
 101                         }
 102                 }
 103
 104                 fclose(f);
 105         }
 106
 107         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 108         {
 109                 c = blobmsg_open_table(&b, "release");
 110
 111                 while (fgets(line, sizeof(line), f))
 112                 {
 113                         key = strtok(line, "=\"");
 114                         val = strtok(NULL, "\"\n");
 115
 116                         if (!key || !val)
 117                                 continue;
 118
 119                         if (!strcasecmp(key, "DISTRIB_ID"))
 120                                 blobmsg_add_string(&b, "distribution", val);
 121                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 122                                 blobmsg_add_string(&b, "version", val);
 123                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 124                                 blobmsg_add_string(&b, "revision", val);
 125                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 126                                 blobmsg_add_string(&b, "codename", val);
 127                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 128                                 blobmsg_add_string(&b, "target", val);
 129                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 130                                 blobmsg_add_string(&b, "description", val);
 131                 }
 132
 133                 blobmsg_close_array(&b, c);
 134
 135                 fclose(f);
 136         }
 137
 138         ubus_send_reply(ctx, req, b.head);
 139
 140         return UBUS_STATUS_OK;
 141 }
 142
 143 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 144                 struct ubus_request_data *req, const char *method,
 145                 struct blob_attr *msg)
 146 {
 147         void *c;
 148         time_t now;
 149         struct tm *tm;
 150         struct sysinfo info;
 151
 152         now = time(NULL);
 153
 154         if (!(tm = localtime(&now)))
 155                 return UBUS_STATUS_UNKNOWN_ERROR;
 156
 157         if (sysinfo(&info))
 158                 return UBUS_STATUS_UNKNOWN_ERROR;
 159
 160         blob_buf_init(&b, 0);
 161
 162         blobmsg_add_u32(&b, "uptime",    info.uptime);
 163         blobmsg_add_u32(&b, "localtime", mktime(tm));
 164
 165         c = blobmsg_open_array(&b, "load");
 166         blobmsg_add_u32(&b, NULL, info.loads[0]);
 167         blobmsg_add_u32(&b, NULL, info.loads[1]);
 168         blobmsg_add_u32(&b, NULL, info.loads[2]);
 169         blobmsg_close_array(&b, c);
 170
 171         c = blobmsg_open_table(&b, "memory");
 172         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalram);
 173         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeram);
 174         blobmsg_add_u32(&b, "shared",   info.mem_unit * info.sharedram);
 175         blobmsg_add_u32(&b, "buffered", info.mem_unit * info.bufferram);
 176         blobmsg_close_table(&b, c);
 177
 178         c = blobmsg_open_table(&b, "swap");
 179         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalswap);
 180         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeswap);
 181         blobmsg_close_table(&b, c);
 182
 183         ubus_send_reply(ctx, req, b.head);
 184
 185         return UBUS_STATUS_OK;
 186 }
 187
 188 static int system_upgrade(struct ubus_context *ctx, struct ubus_object *obj,
 189                         struct ubus_request_data *req, const char *method,
 190                         struct blob_attr *msg)
 191 {
 192         procd_reconnect_ubus(0);
 193         log_shutdown();
 194         hotplug_shutdown();
 195
 196         upgrade_running = 1;
 197
 198         return 0;
 199 }
 200
 201 enum {
 202         WDT_FREQUENCY,
 203         WDT_TIMEOUT,
 204         WDT_STOP,
 205         __WDT_MAX
 206 };
 207
 208 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 209         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 210         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 211         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 212 };
 213
 214 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 215                         struct ubus_request_data *req, const char *method,
 216                         struct blob_attr *msg)
 217 {
 218         struct blob_attr *tb[__WDT_MAX];
 219         const char *status;
 220
 221         if (!msg)
 222                 return UBUS_STATUS_INVALID_ARGUMENT;
 223
 224         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 225         if (tb[WDT_FREQUENCY]) {
 226                 unsigned int timeout = watchdog_timeout(0);
 227                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 228
 229                 if (freq) {
 230                         if (freq > timeout / 2)
 231                                 freq = timeout / 2;
 232                         watchdog_frequency(freq);
 233                 }
 234         }
 235
 236         if (tb[WDT_TIMEOUT]) {
 237                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 238                 unsigned int frequency = watchdog_frequency(0);
 239
 240                 if (timeout <= frequency)
 241                         timeout = frequency * 2;
 242                  watchdog_timeout(timeout);
 243         }
 244
 245         if (tb[WDT_STOP])
 246                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 247
 248         if (watchdog_fd() < 0)
 249                 status = "offline";
 250         else if (watchdog_get_stopped())
 251                 status = "stopped";
 252         else
 253                 status = "running";
 254
 255         blob_buf_init(&b, 0);
 256         blobmsg_add_string(&b, "status", status);
 257         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 258         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 259         ubus_send_reply(ctx, req, b.head);
 260
 261         return 0;
 262 }
 263
 264 enum {
 265         SIGNAL_PID,
 266         SIGNAL_NUM,
 267         __SIGNAL_MAX
 268 };
 269
 270 static const struct blobmsg_policy signal_policy[__WDT_MAX] = {
 271         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 272         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 273 };
 274
 275 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 276                         struct ubus_request_data *req, const char *method,
 277                         struct blob_attr *msg)
 278 {
 279         struct blob_attr *tb[__SIGNAL_MAX];
 280
 281         if (!msg)
 282                 return UBUS_STATUS_INVALID_ARGUMENT;
 283
 284         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 285         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 286                 return UBUS_STATUS_INVALID_ARGUMENT;
 287
 288         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 289
 290         return 0;
 291 }
 292
 293 static const struct ubus_method system_methods[] = {
 294         UBUS_METHOD_NOARG("board", system_board),
 295         UBUS_METHOD_NOARG("info",  system_info),
 296         UBUS_METHOD_NOARG("upgrade", system_upgrade),
 297         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 298         UBUS_METHOD("signal", proc_signal, signal_policy),
 299 };
 300
 301 static struct ubus_object_type system_object_type =
 302         UBUS_OBJECT_TYPE("system", system_methods);
 303
 304 static struct ubus_object system_object = {
 305         .name = "system",
 306         .type = &system_object_type,
 307         .methods = system_methods,
 308         .n_methods = ARRAY_SIZE(system_methods),
 309 };
 310
 311 void ubus_init_system(struct ubus_context *ctx)
 312 {
 313         int ret;
 314
 315         ret = ubus_add_object(ctx, &system_object);
 316         if (ret)
 317                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 318 }