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
  64                 }
  65         }
  66         for (i = 0; i < config->network.n_dns_servers; i++)
  67                 pb_log("  dns server %s\n", config->network.dns_servers[i]);
  68
  69         for (i = 0; i < config->n_autoboot_opts; i++) {
  70                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
  71                         pb_log("  boot device %d: %s\n", i,
  72                                device_type_name(config->autoboot_opts[i].type));
  73                 else
  74                         pb_log("  boot device %d: uuid: %s\n",
  75                                i, config->autoboot_opts[i].uuid);
  76         }
  77
  78         pb_log("  IPMI boot device 0x%02x%s\n", config->ipmi_bootdev,
  79                         config->ipmi_bootdev_persistent ? " (persistent)" : "");
  80
  81
  82         pb_log(" language: %s\n", config->lang ?: "");
  83 }
  84
  85 static bool config_debug_on_cmdline(void)
  86 {
  87         char buf[600];
  88         int rc, fd;
  89
  90         fd = open("/proc/cmdline", O_RDONLY);
  91         if (fd < 0)
  92                 return false;
  93
  94         rc = read(fd, buf, sizeof(buf));
  95         close(fd);
  96
  97         if (rc <= 0)
  98                 return false;
  99
 100         return memmem(buf, rc, kernel_cmdline_debug,
 101                         strlen(kernel_cmdline_debug)) != NULL;
 102 }
 103
 104 void config_set_defaults(struct config *config)
 105 {
 106         const char *lang;
 107
 108         config->autoboot_enabled = true;
 109         config->autoboot_timeout_sec = 10;
 110         config->autoboot_enabled = true;
 111         config->network.interfaces = NULL;
 112         config->network.n_interfaces = 0;
 113         config->network.dns_servers = NULL;
 114         config->network.n_dns_servers = 0;
 115         config->safe_mode = false;
 116         config->allow_writes = true;
 117         config->disable_snapshots = false;
 118
 119         config->n_autoboot_opts = 2;
 120         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 121                                                 config->n_autoboot_opts);
 122         config->autoboot_opts[0].boot_type = BOOT_DEVICE_TYPE;
 123         config->autoboot_opts[0].type = DEVICE_TYPE_NETWORK;
 124         config->autoboot_opts[1].boot_type = BOOT_DEVICE_TYPE;
 125         config->autoboot_opts[1].type = DEVICE_TYPE_ANY;
 126
 127         config->ipmi_bootdev = 0;
 128         config->ipmi_bootdev_persistent = false;
 129
 130         config->debug = config_debug_on_cmdline();
 131
 132         lang = setlocale(LC_ALL, NULL);
 133         pb_log("lang: %s\n", lang);
 134         if (lang && strlen(lang))
 135                 config->lang = talloc_strdup(config, lang);
 136         else
 137                 config->lang = NULL;
 138
 139 }
 140
 141 int platform_init(void *ctx)
 142 {
 143         extern struct platform *__start_platforms,  *__stop_platforms;
 144         struct platform **p;
 145
 146         platform_ctx = talloc_new(ctx);
 147
 148         for (p = &__start_platforms; p < &__stop_platforms; p++) {
 149                 if (!(*p)->probe(*p, platform_ctx))
 150                         continue;
 151                 platform = *p;
 152                 break;
 153         }
 154
 155         config = talloc(platform_ctx, struct config);
 156         config_set_defaults(config);
 157
 158         if (platform) {
 159                 pb_log("Detected platform type: %s\n", platform->name);
 160                 if (platform->load_config)
 161                         platform->load_config(platform, config);
 162         } else {
 163                 pb_log("No platform type detected, some platform-specific "
 164                                 "functionality will be disabled\n");
 165         }
 166
 167         dump_config(config);
 168
 169         return 0;
 170 }
 171
 172 const struct platform *platform_get(void)
 173 {
 174         return platform;
 175 }
 176
 177 void platform_pre_boot(void)
 178 {
 179         const struct config *config = config_get();
 180
 181         if (platform && config && platform->pre_boot)
 182                 platform->pre_boot(platform, config);
 183 }
 184
 185 int platform_get_sysinfo(struct system_info *info)
 186 {
 187         if (platform && platform->get_sysinfo)
 188                 return platform->get_sysinfo(platform, info);
 189         return -1;
 190 }
 191
 192 int config_set(struct config *newconfig)
 193 {
 194         int rc;
 195
 196         if (!platform || !platform->save_config)
 197                 return -1;
 198
 199         if (newconfig == config)
 200                 return 0;
 201
 202         pb_log("new configuration data received\n");
 203         dump_config(newconfig);
 204
 205         rc = platform->save_config(platform, newconfig);
 206
 207         if (!rc)
 208                 config = talloc_steal(platform_ctx, newconfig);
 209         else
 210                 pb_log("error saving new configuration; changes lost\n");
 211
 212         return rc;
 213 }
 214
 215 /* A non-exported function to allow the test infrastructure to initialise
 216  * (and change) the configuration variables */
 217 struct parser_test;
 218 struct config __attribute__((unused)) *test_config_init(
 219                 struct parser_test *test);
 220 struct config *test_config_init(struct parser_test *test)
 221 {
 222         config = talloc(test, struct config);
 223         config_set_defaults(config);
 224         return config;
 225 }
 226
 227 const struct config *config_get(void)
 228 {
 229         return config;
 230 }
 231
 232 void config_set_autoboot(bool autoboot_enabled)
 233 {
 234         config->autoboot_enabled = autoboot_enabled;
 235
 236         pb_log("set autoboot: %s\n",
 237                         config->autoboot_enabled ? "enabled" : "disabled");
 238 }
 239
 240 int platform_fini(void)
 241 {
 242         talloc_free(platform_ctx);
 243         return 0;
 244 }