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
  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 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
  33                  struct ubus_request_data *req, const char *method,
  34                  struct blob_attr *msg)
  35 {
  36         void *c;
  37         char line[256];
  38         char *key, *val;
  39         struct utsname utsname;
  40         FILE *f;
  41
  42         blob_buf_init(&b, 0);
  43
  44         if (uname(&utsname) >= 0)
  45         {
  46                 blobmsg_add_string(&b, "kernel", utsname.release);
  47                 blobmsg_add_string(&b, "hostname", utsname.nodename);
  48         }
  49
  50         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  51         {
  52                 while(fgets(line, sizeof(line), f))
  53                 {
  54                         key = strtok(line, "\t:");
  55                         val = strtok(NULL, "\t\n");
  56
  57                         if (!key || !val)
  58                                 continue;
  59
  60                         if (!strcasecmp(key, "system type") ||
  61                             !strcasecmp(key, "processor") ||
  62                             !strcasecmp(key, "model name"))
  63                         {
  64                                 blobmsg_add_string(&b, "system", val + 2);
  65                                 break;
  66                         }
  67                 }
  68
  69                 fclose(f);
  70         }
  71
  72         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL)
  73         {
  74                 if (fgets(line, sizeof(line), f))
  75                 {
  76                         val = strtok(line, "\t\n");
  77
  78                         if (val)
  79                                 blobmsg_add_string(&b, "model", val);
  80                 }
  81
  82                 fclose(f);
  83         }
  84         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  85         {
  86                 while(fgets(line, sizeof(line), f))
  87                 {
  88                         key = strtok(line, "\t:");
  89                         val = strtok(NULL, "\t\n");
  90
  91                         if (!key || !val)
  92                                 continue;
  93
  94                         if (!strcasecmp(key, "machine") ||
  95                             !strcasecmp(key, "hardware"))
  96                         {
  97                                 blobmsg_add_string(&b, "model", val + 2);
  98                                 break;
  99                         }
 100                 }
 101
 102                 fclose(f);
 103         }
 104
 105         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 106         {
 107                 c = blobmsg_open_table(&b, "release");
 108
 109                 while (fgets(line, sizeof(line), f))
 110                 {
 111                         key = strtok(line, "=\"");
 112                         val = strtok(NULL, "\"\n");
 113
 114                         if (!key || !val)
 115                                 continue;
 116
 117                         if (!strcasecmp(key, "DISTRIB_ID"))
 118                                 blobmsg_add_string(&b, "distribution", val);
 119                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 120                                 blobmsg_add_string(&b, "version", val);
 121                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 122                                 blobmsg_add_string(&b, "revision", val);
 123                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 124                                 blobmsg_add_string(&b, "codename", val);
 125                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 126                                 blobmsg_add_string(&b, "target", val);
 127                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 128                                 blobmsg_add_string(&b, "description", val);
 129                 }
 130
 131                 blobmsg_close_array(&b, c);
 132
 133                 fclose(f);
 134         }
 135
 136         ubus_send_reply(ctx, req, b.head);
 137
 138         return UBUS_STATUS_OK;
 139 }
 140
 141 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 142                 struct ubus_request_data *req, const char *method,
 143                 struct blob_attr *msg)
 144 {
 145         void *c;
 146         time_t now;
 147         struct tm *tm;
 148         struct sysinfo info;
 149
 150         now = time(NULL);
 151
 152         if (!(tm = localtime(&now)))
 153                 return UBUS_STATUS_UNKNOWN_ERROR;
 154
 155         if (sysinfo(&info))
 156                 return UBUS_STATUS_UNKNOWN_ERROR;
 157
 158         blob_buf_init(&b, 0);
 159
 160         blobmsg_add_u32(&b, "uptime",    info.uptime);
 161         blobmsg_add_u32(&b, "localtime", mktime(tm));
 162
 163         c = blobmsg_open_array(&b, "load");
 164         blobmsg_add_u32(&b, NULL, info.loads[0]);
 165         blobmsg_add_u32(&b, NULL, info.loads[1]);
 166         blobmsg_add_u32(&b, NULL, info.loads[2]);
 167         blobmsg_close_array(&b, c);
 168
 169         c = blobmsg_open_table(&b, "memory");
 170         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalram);
 171         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeram);
 172         blobmsg_add_u32(&b, "shared",   info.mem_unit * info.sharedram);
 173         blobmsg_add_u32(&b, "buffered", info.mem_unit * info.bufferram);
 174         blobmsg_close_table(&b, c);
 175
 176         c = blobmsg_open_table(&b, "swap");
 177         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalswap);
 178         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeswap);
 179         blobmsg_close_table(&b, c);
 180
 181         ubus_send_reply(ctx, req, b.head);
 182
 183         return UBUS_STATUS_OK;
 184 }
 185
 186 static int system_upgrade(struct ubus_context *ctx, struct ubus_object *obj,
 187                         struct ubus_request_data *req, const char *method,
 188                         struct blob_attr *msg)
 189 {
 190         procd_reconnect_ubus(0);
 191         log_shutdown();
 192         hotplug_shutdown();
 193
 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 static const struct ubus_method system_methods[] = {
 261         UBUS_METHOD_NOARG("board", system_board),
 262         UBUS_METHOD_NOARG("info",  system_info),
 263         UBUS_METHOD_NOARG("upgrade", system_upgrade),
 264         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 265 };
 266
 267 static struct ubus_object_type system_object_type =
 268         UBUS_OBJECT_TYPE("system", system_methods);
 269
 270 static struct ubus_object system_object = {
 271         .name = "system",
 272         .type = &system_object_type,
 273         .methods = system_methods,
 274         .n_methods = ARRAY_SIZE(system_methods),
 275 };
 276
 277 void ubus_init_system(struct ubus_context *ctx)
 278 {
 279         int ret;
 280
 281         ret = ubus_add_object(ctx, &system_object);
 282         if (ret)
 283                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 284 }