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

   1
   2 #define _GNU_SOURCE
   3
   4 #include <fcntl.h>
   5 #include <string.h>
   6
   7 #include <log/log.h>
   8 #include <file/file.h>
   9 #include <types/types.h>
  10 #include <talloc/talloc.h>
  11
  12 #include "platform.h"
  13
  14 void                    *platform_ctx;
  15 static struct platform  *platform;
  16 static struct config    *config;
  17
  18 static const char *kernel_cmdline_debug = "petitboot.debug";
  19
  20 static const char *device_type_name(enum device_type type)
  21 {
  22         switch (type) {
  23         case DEVICE_TYPE_DISK:
  24                 return "disk";
  25         case DEVICE_TYPE_OPTICAL:
  26                 return "optical";
  27         case DEVICE_TYPE_NETWORK:
  28                 return "network";
  29         case DEVICE_TYPE_ANY:
  30                 return "any";
  31         case DEVICE_TYPE_UNKNOWN:
  32         default:
  33                 return "unknown";
  34         }
  35 }
  36
  37 static void dump_config(struct config *config)
  38 {
  39         unsigned int i;
  40
  41         pb_log("configuration:\n");
  42
  43         if (config->autoboot_enabled)
  44                 pb_log(" autoboot: enabled, %d sec\n",
  45                                 config->autoboot_timeout_sec);
  46         else
  47                 pb_log(" autoboot: disabled\n");
  48
  49         if (config->network.n_interfaces || config->network.n_dns_servers)
  50                 pb_log(" network configuration:\n");
  51
  52         if (config->safe_mode)
  53                 pb_log(" safe mode: active\n");
  54
  55         for (i = 0; i < config->network.n_interfaces; i++) {
  56                 struct interface_config *ifconf =
  57                         config->network.interfaces[i];
  58
  59                 pb_log("  interface %02x:%02x:%02x:%02x:%02x:%02x\n",
  60                                 ifconf->hwaddr[0], ifconf->hwaddr[1],
  61                                 ifconf->hwaddr[2], ifconf->hwaddr[3],
  62                                 ifconf->hwaddr[4], ifconf->hwaddr[5]);
  63
  64                 if (ifconf->ignore) {
  65                         pb_log("   ignore\n");
  66                         continue;
  67                 }
  68
  69                 if (ifconf->method == CONFIG_METHOD_DHCP) {
  70                         pb_log("   dhcp\n");
  71
  72                 } else if (ifconf->method == CONFIG_METHOD_STATIC) {
  73                         pb_log("   static:\n");
  74                         pb_log("    ip:  %s\n", ifconf->static_config.address);
  75                         pb_log("    gw:  %s\n", ifconf->static_config.gateway);
  76
  77                 }
  78         }
  79         for (i = 0; i < config->network.n_dns_servers; i++)
  80                 pb_log("  dns server %s\n", config->network.dns_servers[i]);
  81
  82         if (config->boot_device)
  83                 pb_log("  boot device %s\n", config->boot_device);
  84
  85         if (config->n_boot_priorities)
  86                 pb_log(" boot priority order:\n");
  87
  88         for (i = 0; i < config->n_boot_priorities; i++) {
  89                 struct boot_priority *prio = &config->boot_priorities[i];
  90                 pb_log(" %10s: %d\n", device_type_name(prio->type),
  91                                         prio->priority);
  92         }
  93
  94         pb_log("  IPMI boot device 0x%02x%s\n", config->ipmi_bootdev,
  95                         config->ipmi_bootdev_persistent ? " (persistent)" : "");
  96
  97
  98         pb_log(" language: %s\n", config->lang ?: "");
  99 }
 100
 101 static bool config_debug_on_cmdline(void)
 102 {
 103         char buf[600];
 104         int rc, fd;
 105
 106         fd = open("/proc/cmdline", O_RDONLY);
 107         if (fd < 0)
 108                 return false;
 109
 110         rc = read(fd, buf, sizeof(buf));
 111         close(fd);
 112
 113         if (rc <= 0)
 114                 return false;
 115
 116         return memmem(buf, rc, kernel_cmdline_debug,
 117                         strlen(kernel_cmdline_debug)) != NULL;
 118 }
 119
 120 void config_set_defaults(struct config *config)
 121 {
 122         config->autoboot_enabled = true;
 123         config->autoboot_timeout_sec = 10;
 124         config->autoboot_enabled = true;
 125         config->network.interfaces = NULL;
 126         config->network.n_interfaces = 0;
 127         config->network.dns_servers = NULL;
 128         config->network.n_dns_servers = 0;
 129         config->boot_device = NULL;
 130         config->safe_mode = false;
 131         config->lang = NULL;
 132
 133         config->n_boot_priorities = 2;
 134         config->boot_priorities = talloc_array(config, struct boot_priority,
 135                                                 config->n_boot_priorities);
 136         config->boot_priorities[0].type = DEVICE_TYPE_NETWORK;
 137         config->boot_priorities[0].priority = 0;
 138         config->boot_priorities[1].type = DEVICE_TYPE_ANY;
 139         config->boot_priorities[1].priority = 1;
 140
 141         config->ipmi_bootdev = 0;
 142         config->ipmi_bootdev_persistent = false;
 143
 144         config->debug = config_debug_on_cmdline();
 145 }
 146
 147 int platform_init(void *ctx)
 148 {
 149         extern struct platform *__start_platforms,  *__stop_platforms;
 150         struct platform **p;
 151
 152         platform_ctx = talloc_new(ctx);
 153
 154         for (p = &__start_platforms; p < &__stop_platforms; p++) {
 155                 if (!(*p)->probe(*p, platform_ctx))
 156                         continue;
 157                 platform = *p;
 158                 break;
 159         }
 160
 161         config = talloc(platform_ctx, struct config);
 162         config_set_defaults(config);
 163
 164         if (platform) {
 165                 pb_log("Detected platform type: %s\n", platform->name);
 166                 if (platform->load_config)
 167                         platform->load_config(platform, config);
 168         } else {
 169                 pb_log("No platform type detected, some platform-specific "
 170                                 "functionality will be disabled\n");
 171         }
 172
 173         dump_config(config);
 174
 175         return 0;
 176 }
 177
 178 const struct platform *platform_get(void)
 179 {
 180         return platform;
 181 }
 182
 183 void platform_finalise_config(void)
 184 {
 185         const struct config *config = config_get();
 186
 187         if (platform && config && platform->finalise_config)
 188                 platform->finalise_config(platform, config);
 189 }
 190
 191 int platform_get_sysinfo(struct system_info *info)
 192 {
 193         if (platform && platform->get_sysinfo)
 194                 return platform->get_sysinfo(platform, info);
 195         return -1;
 196 }
 197
 198 int config_set(struct config *newconfig)
 199 {
 200         int rc;
 201
 202         if (!platform || !platform->save_config)
 203                 return -1;
 204
 205         if (newconfig == config)
 206                 return 0;
 207
 208         pb_log("new configuration data received\n");
 209         dump_config(newconfig);
 210
 211         rc = platform->save_config(platform, newconfig);
 212
 213         if (!rc)
 214                 config = talloc_steal(platform_ctx, newconfig);
 215         else
 216                 pb_log("error saving new configuration; changes lost\n");
 217
 218         return rc;
 219 }
 220
 221 /* A non-exported function to allow the test infrastructure to initialise
 222  * (and change) the configuration variables */
 223 struct parser_test;
 224 struct config __attribute__((unused)) *test_config_init(
 225                 struct parser_test *test);
 226 struct config *test_config_init(struct parser_test *test)
 227 {
 228         config = talloc(test, struct config);
 229         config_set_defaults(config);
 230         return config;
 231 }
 232
 233 const struct config *config_get(void)
 234 {
 235         return config;
 236 }
 237
 238 void config_set_autoboot(bool autoboot_enabled)
 239 {
 240         config->autoboot_enabled = autoboot_enabled;
 241
 242         pb_log("set autoboot: %s\n",
 243                         config->autoboot_enabled ? "enabled" : "disabled");
 244 }
 245
 246 int platform_fini(void)
 247 {
 248         talloc_free(platform_ctx);
 249         return 0;
 250 }