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
 112         config->n_autoboot_opts = 2;
 113         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 114                                                 config->n_autoboot_opts);
 115         config->autoboot_opts[0].boot_type = BOOT_DEVICE_TYPE;
 116         config->autoboot_opts[0].type = DEVICE_TYPE_NETWORK;
 117         config->autoboot_opts[1].boot_type = BOOT_DEVICE_TYPE;
 118         config->autoboot_opts[1].type = DEVICE_TYPE_ANY;
 119
 120         config->ipmi_bootdev = 0;
 121         config->ipmi_bootdev_persistent = false;
 122
 123         config->debug = config_debug_on_cmdline();
 124 }
 125
 126 int platform_init(void *ctx)
 127 {
 128         extern struct platform *__start_platforms,  *__stop_platforms;
 129         struct platform **p;
 130
 131         platform_ctx = talloc_new(ctx);
 132
 133         for (p = &__start_platforms; p < &__stop_platforms; p++) {
 134                 if (!(*p)->probe(*p, platform_ctx))
 135                         continue;
 136                 platform = *p;
 137                 break;
 138         }
 139
 140         config = talloc(platform_ctx, struct config);
 141         config_set_defaults(config);
 142
 143         if (platform) {
 144                 pb_log("Detected platform type: %s\n", platform->name);
 145                 if (platform->load_config)
 146                         platform->load_config(platform, config);
 147         } else {
 148                 pb_log("No platform type detected, some platform-specific "
 149                                 "functionality will be disabled\n");
 150         }
 151
 152         dump_config(config);
 153
 154         return 0;
 155 }
 156
 157 const struct platform *platform_get(void)
 158 {
 159         return platform;
 160 }
 161
 162 void platform_pre_boot(void)
 163 {
 164         const struct config *config = config_get();
 165
 166         if (platform && config && platform->pre_boot)
 167                 platform->pre_boot(platform, config);
 168 }
 169
 170 int platform_get_sysinfo(struct system_info *info)
 171 {
 172         if (platform && platform->get_sysinfo)
 173                 return platform->get_sysinfo(platform, info);
 174         return -1;
 175 }
 176
 177 int config_set(struct config *newconfig)
 178 {
 179         int rc;
 180
 181         if (!platform || !platform->save_config)
 182                 return -1;
 183
 184         if (newconfig == config)
 185                 return 0;
 186
 187         pb_log("new configuration data received\n");
 188         dump_config(newconfig);
 189
 190         rc = platform->save_config(platform, newconfig);
 191
 192         if (!rc)
 193                 config = talloc_steal(platform_ctx, newconfig);
 194         else
 195                 pb_log("error saving new configuration; changes lost\n");
 196
 197         return rc;
 198 }
 199
 200 /* A non-exported function to allow the test infrastructure to initialise
 201  * (and change) the configuration variables */
 202 struct parser_test;
 203 struct config __attribute__((unused)) *test_config_init(
 204                 struct parser_test *test);
 205 struct config *test_config_init(struct parser_test *test)
 206 {
 207         config = talloc(test, struct config);
 208         config_set_defaults(config);
 209         return config;
 210 }
 211
 212 const struct config *config_get(void)
 213 {
 214         return config;
 215 }
 216
 217 void config_set_autoboot(bool autoboot_enabled)
 218 {
 219         config->autoboot_enabled = autoboot_enabled;
 220
 221         pb_log("set autoboot: %s\n",
 222                         config->autoboot_enabled ? "enabled" : "disabled");
 223 }
 224
 225 int platform_fini(void)
 226 {
 227         talloc_free(platform_ctx);
 228         return 0;
 229 }