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