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
  83         pb_log(" language: %s\n", config->lang ?: "");
  84 }
  85
  86 static bool config_debug_on_cmdline(void)
  87 {
  88         char buf[600];
  89         int rc, fd;
  90
  91         fd = open("/proc/cmdline", O_RDONLY);
  92         if (fd < 0)
  93                 return false;
  94
  95         rc = read(fd, buf, sizeof(buf));
  96         close(fd);
  97
  98         if (rc <= 0)
  99                 return false;
 100
 101         return memmem(buf, rc, kernel_cmdline_debug,
 102                         strlen(kernel_cmdline_debug)) != NULL;
 103 }
 104
 105 void config_set_defaults(struct config *config)
 106 {
 107         const char *lang;
 108
 109         config->autoboot_enabled = true;
 110         config->autoboot_timeout_sec = 10;
 111         config->autoboot_enabled = true;
 112         config->network.interfaces = NULL;
 113         config->network.n_interfaces = 0;
 114         config->network.dns_servers = NULL;
 115         config->network.n_dns_servers = 0;
 116         config->safe_mode = false;
 117         config->allow_writes = true;
 118         config->disable_snapshots = false;
 119
 120         config->n_autoboot_opts = 2;
 121         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 122                                                 config->n_autoboot_opts);
 123         config->autoboot_opts[0].boot_type = BOOT_DEVICE_TYPE;
 124         config->autoboot_opts[0].type = DEVICE_TYPE_NETWORK;
 125         config->autoboot_opts[1].boot_type = BOOT_DEVICE_TYPE;
 126         config->autoboot_opts[1].type = DEVICE_TYPE_ANY;
 127
 128         config->ipmi_bootdev = 0;
 129         config->ipmi_bootdev_persistent = false;
 130
 131         config->debug = config_debug_on_cmdline();
 132
 133         lang = setlocale(LC_ALL, NULL);
 134         pb_log("lang: %s\n", lang);
 135         if (lang && strlen(lang))
 136                 config->lang = talloc_strdup(config, lang);
 137         else
 138                 config->lang = NULL;
 139
 140 }
 141
 142 int platform_init(void *ctx)
 143 {
 144         extern struct platform *__start_platforms,  *__stop_platforms;
 145         struct platform **p;
 146
 147         platform_ctx = talloc_new(ctx);
 148
 149         for (p = &__start_platforms; p < &__stop_platforms; p++) {
 150                 if (!(*p)->probe(*p, platform_ctx))
 151                         continue;
 152                 platform = *p;
 153                 break;
 154         }
 155
 156         config = talloc(platform_ctx, struct config);
 157         config_set_defaults(config);
 158
 159         if (platform) {
 160                 pb_log("Detected platform type: %s\n", platform->name);
 161                 if (platform->load_config)
 162                         platform->load_config(platform, config);
 163         } else {
 164                 pb_log("No platform type detected, some platform-specific "
 165                                 "functionality will be disabled\n");
 166         }
 167
 168         dump_config(config);
 169
 170         return 0;
 171 }
 172
 173 const struct platform *platform_get(void)
 174 {
 175         return platform;
 176 }
 177
 178 void platform_pre_boot(void)
 179 {
 180         const struct config *config = config_get();
 181
 182         if (platform && config && platform->pre_boot)
 183                 platform->pre_boot(platform, config);
 184 }
 185
 186 int platform_get_sysinfo(struct system_info *info)
 187 {
 188         if (platform && platform->get_sysinfo)
 189                 return platform->get_sysinfo(platform, info);
 190         return -1;
 191 }
 192
 193 int config_set(struct config *newconfig)
 194 {
 195         int rc;
 196
 197         if (!platform || !platform->save_config)
 198                 return -1;
 199
 200         if (newconfig == config)
 201                 return 0;
 202
 203         pb_log("new configuration data received\n");
 204         dump_config(newconfig);
 205
 206         rc = platform->save_config(platform, newconfig);
 207
 208         if (!rc)
 209                 config = talloc_steal(platform_ctx, newconfig);
 210         else
 211                 pb_log("error saving new configuration; changes lost\n");
 212
 213         return rc;
 214 }
 215
 216 /* A non-exported function to allow the test infrastructure to initialise
 217  * (and change) the configuration variables */
 218 struct parser_test;
 219 struct config __attribute__((unused)) *test_config_init(
 220                 struct parser_test *test);
 221 struct config *test_config_init(struct parser_test *test)
 222 {
 223         config = talloc(test, struct config);
 224         config_set_defaults(config);
 225         return config;
 226 }
 227
 228 const struct config *config_get(void)
 229 {
 230         return config;
 231 }
 232
 233 void config_set_autoboot(bool autoboot_enabled)
 234 {
 235         config->autoboot_enabled = autoboot_enabled;
 236
 237         pb_log("set autoboot: %s\n",
 238                         config->autoboot_enabled ? "enabled" : "disabled");
 239 }
 240
 241 int platform_fini(void)
 242 {
 243         talloc_free(platform_ctx);
 244         return 0;
 245 }