git.ozlabs.org Git - petitboot/blob - discover/platform.c

   1
   2 #define _GNU_SOURCE
   3
   4 #include <fcntl.h>
   5 #include <string.h>
   6 #include <locale.h>
   7
   8 #include <log/log.h>
   9 #include <file/file.h>
  10 #include <types/types.h>
  11 #include <talloc/talloc.h>
  12
  13 #include "platform.h"
  14
  15 void                    *platform_ctx;
  16 static struct platform  *platform;
  17 static struct config    *config;
  18
  19 static const char *kernel_cmdline_debug = "petitboot.debug";
  20
  21 static void dump_config(struct config *config)
  22 {
  23         unsigned int i;
  24
  25         pb_log("configuration:\n");
  26
  27         if (config->autoboot_enabled)
  28                 pb_log(" autoboot: enabled, %d sec\n",
  29                                 config->autoboot_timeout_sec);
  30         else
  31                 pb_log(" autoboot: disabled\n");
  32
  33         if (config->network.n_interfaces || config->network.n_dns_servers)
  34                 pb_log(" network configuration:\n");
  35
  36         if (config->safe_mode)
  37                 pb_log(" safe mode: active\n");
  38
  39         if (config->disable_snapshots)
  40                 pb_log(" dm-snapshots disabled\n");
  41
  42         for (i = 0; i < config->network.n_interfaces; i++) {
  43                 struct interface_config *ifconf =
  44                         config->network.interfaces[i];
  45
  46                 pb_log("  interface %02x:%02x:%02x:%02x:%02x:%02x\n",
  47                                 ifconf->hwaddr[0], ifconf->hwaddr[1],
  48                                 ifconf->hwaddr[2], ifconf->hwaddr[3],
  49                                 ifconf->hwaddr[4], ifconf->hwaddr[5]);
  50
  51                 if (ifconf->ignore) {
  52                         pb_log("   ignore\n");
  53                         continue;
  54                 }
  55
  56                 if (ifconf->method == CONFIG_METHOD_DHCP) {
  57                         pb_log("   dhcp\n");
  58
  59                 } else if (ifconf->method == CONFIG_METHOD_STATIC) {
  60                         pb_log("   static:\n");
  61                         pb_log("    ip:  %s\n", ifconf->static_config.address);
  62                         pb_log("    gw:  %s\n", ifconf->static_config.gateway);
  63                         pb_log("    url:  %s\n", ifconf->static_config.url);
  64
  65                 }
  66         }
  67         for (i = 0; i < config->network.n_dns_servers; i++)
  68                 pb_log("  dns server %s\n", config->network.dns_servers[i]);
  69
  70         for (i = 0; i < config->n_autoboot_opts; i++) {
  71                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
  72                         pb_log("  boot device %d: %s\n", i,
  73                                device_type_name(config->autoboot_opts[i].type));
  74                 else
  75                         pb_log("  boot device %d: uuid: %s\n",
  76                                i, config->autoboot_opts[i].uuid);
  77         }
  78
  79         pb_log("  IPMI boot device 0x%02x%s\n", config->ipmi_bootdev,
  80                         config->ipmi_bootdev_persistent ? " (persistent)" : "");
  81
  82         pb_log("  Modifications allowed to disks: %s\n",
  83                         config->allow_writes ? "yes" : "no");
  84
  85         pb_log("  Default UI to boot on: %s\n",
  86                 config->boot_console ?: "none set");
  87         if (config->manual_console)
  88                 pb_log("    (Manually set)\n");
  89
  90
  91         pb_log(" language: %s\n", config->lang ?: "");
  92 }
  93
  94 static bool config_debug_on_cmdline(void)
  95 {
  96         char buf[600];
  97         int rc, fd;
  98
  99         fd = open("/proc/cmdline", O_RDONLY);
 100         if (fd < 0)
 101                 return false;
 102
 103         rc = read(fd, buf, sizeof(buf));
 104         close(fd);
 105
 106         if (rc <= 0)
 107                 return false;
 108
 109         return memmem(buf, rc, kernel_cmdline_debug,
 110                         strlen(kernel_cmdline_debug)) != NULL;
 111 }
 112
 113 void config_set_defaults(struct config *config)
 114 {
 115         const char *lang;
 116
 117         config->autoboot_enabled = true;
 118         config->autoboot_timeout_sec = 10;
 119         config->autoboot_enabled = true;
 120         config->network.interfaces = NULL;
 121         config->network.n_interfaces = 0;
 122         config->network.dns_servers = NULL;
 123         config->network.n_dns_servers = 0;
 124         config->safe_mode = false;
 125         config->allow_writes = true;
 126         config->disable_snapshots = false;
 127
 128         config->n_consoles = 0;
 129         config->consoles = NULL;
 130         config->boot_console = NULL;
 131
 132         config->n_autoboot_opts = 2;
 133         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 134                                                 config->n_autoboot_opts);
 135         config->autoboot_opts[0].boot_type = BOOT_DEVICE_TYPE;
 136         config->autoboot_opts[0].type = DEVICE_TYPE_NETWORK;
 137         config->autoboot_opts[1].boot_type = BOOT_DEVICE_TYPE;
 138         config->autoboot_opts[1].type = DEVICE_TYPE_ANY;
 139
 140         config->ipmi_bootdev = 0;
 141         config->ipmi_bootdev_persistent = false;
 142
 143         config->debug = config_debug_on_cmdline();
 144
 145         lang = setlocale(LC_ALL, NULL);
 146         pb_log("lang: %s\n", lang);
 147         if (lang && strlen(lang))
 148                 config->lang = talloc_strdup(config, lang);
 149         else
 150                 config->lang = NULL;
 151
 152 }
 153
 154 int platform_init(void *ctx)
 155 {
 156         extern struct platform *__start_platforms,  *__stop_platforms;
 157         struct platform **p;
 158
 159         platform_ctx = talloc_new(ctx);
 160
 161         for (p = &__start_platforms; p < &__stop_platforms; p++) {
 162                 if (!(*p)->probe(*p, platform_ctx))
 163                         continue;
 164                 platform = *p;
 165                 break;
 166         }
 167
 168         config = talloc(platform_ctx, struct config);
 169         config_set_defaults(config);
 170
 171         if (platform) {
 172                 pb_log("Detected platform type: %s\n", platform->name);
 173                 if (platform->load_config)
 174                         platform->load_config(platform, config);
 175         } else {
 176                 pb_log("No platform type detected, some platform-specific "
 177                                 "functionality will be disabled\n");
 178         }
 179
 180         dump_config(config);
 181
 182         return 0;
 183 }
 184
 185 const struct platform *platform_get(void)
 186 {
 187         return platform;
 188 }
 189
 190 void platform_pre_boot(void)
 191 {
 192         const struct config *config = config_get();
 193
 194         if (platform && config && platform->pre_boot)
 195                 platform->pre_boot(platform, config);
 196 }
 197
 198 int platform_get_sysinfo(struct system_info *info)
 199 {
 200         if (platform && platform->get_sysinfo)
 201                 return platform->get_sysinfo(platform, info);
 202         return -1;
 203 }
 204
 205 int config_set(struct config *newconfig)
 206 {
 207         int rc;
 208
 209         if (!platform || !platform->save_config)
 210                 return -1;
 211
 212         if (newconfig == config)
 213                 return 0;
 214
 215         pb_log("new configuration data received\n");
 216         dump_config(newconfig);
 217
 218         rc = platform->save_config(platform, newconfig);
 219
 220         if (!rc)
 221                 config = talloc_steal(platform_ctx, newconfig);
 222         else
 223                 pb_log("error saving new configuration; changes lost\n");
 224
 225         return rc;
 226 }
 227
 228 /* A non-exported function to allow the test infrastructure to initialise
 229  * (and change) the configuration variables */
 230 struct parser_test;
 231 struct config __attribute__((unused)) *test_config_init(
 232                 struct parser_test *test);
 233 struct config *test_config_init(struct parser_test *test)
 234 {
 235         config = talloc(test, struct config);
 236         config_set_defaults(config);
 237         return config;
 238 }
 239
 240 const struct config *config_get(void)
 241 {
 242         return config;
 243 }
 244
 245 void config_set_autoboot(bool autoboot_enabled)
 246 {
 247         config->autoboot_enabled = autoboot_enabled;
 248
 249         pb_log("set autoboot: %s\n",
 250                         config->autoboot_enabled ? "enabled" : "disabled");
 251 }
 252
 253 int platform_fini(void)
 254 {
 255         talloc_free(platform_ctx);
 256         return 0;
 257 }