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