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         if (config->disable_snapshots)
  39                 pb_log(" dm-snapshots disabled\n");
  40
  41         for (i = 0; i < config->network.n_interfaces; i++) {
  42                 struct interface_config *ifconf =
  43                         config->network.interfaces[i];
  44
  45                 pb_log("  interface %02x:%02x:%02x:%02x:%02x:%02x\n",
  46                                 ifconf->hwaddr[0], ifconf->hwaddr[1],
  47                                 ifconf->hwaddr[2], ifconf->hwaddr[3],
  48                                 ifconf->hwaddr[4], ifconf->hwaddr[5]);
  49
  50                 if (ifconf->ignore) {
  51                         pb_log("   ignore\n");
  52                         continue;
  53                 }
  54
  55                 if (ifconf->method == CONFIG_METHOD_DHCP) {
  56                         pb_log("   dhcp\n");
  57
  58                 } else if (ifconf->method == CONFIG_METHOD_STATIC) {
  59                         pb_log("   static:\n");
  60                         pb_log("    ip:  %s\n", ifconf->static_config.address);
  61                         pb_log("    gw:  %s\n", ifconf->static_config.gateway);
  62
  63                 }
  64         }
  65         for (i = 0; i < config->network.n_dns_servers; i++)
  66                 pb_log("  dns server %s\n", config->network.dns_servers[i]);
  67
  68         for (i = 0; i < config->n_autoboot_opts; i++) {
  69                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
  70                         pb_log("  boot device %d: %s\n", i,
  71                                device_type_name(config->autoboot_opts[i].type));
  72                 else
  73                         pb_log("  boot device %d: uuid: %s\n",
  74                                i, config->autoboot_opts[i].uuid);
  75         }
  76
  77         pb_log("  IPMI boot device 0x%02x%s\n", config->ipmi_bootdev,
  78                         config->ipmi_bootdev_persistent ? " (persistent)" : "");
  79
  80
  81         pb_log(" language: %s\n", config->lang ?: "");
  82 }
  83
  84 static bool config_debug_on_cmdline(void)
  85 {
  86         char buf[600];
  87         int rc, fd;
  88
  89         fd = open("/proc/cmdline", O_RDONLY);
  90         if (fd < 0)
  91                 return false;
  92
  93         rc = read(fd, buf, sizeof(buf));
  94         close(fd);
  95
  96         if (rc <= 0)
  97                 return false;
  98
  99         return memmem(buf, rc, kernel_cmdline_debug,
 100                         strlen(kernel_cmdline_debug)) != NULL;
 101 }
 102
 103 void config_set_defaults(struct config *config)
 104 {
 105         config->autoboot_enabled = true;
 106         config->autoboot_timeout_sec = 10;
 107         config->autoboot_enabled = true;
 108         config->network.interfaces = NULL;
 109         config->network.n_interfaces = 0;
 110         config->network.dns_servers = NULL;
 111         config->network.n_dns_servers = 0;
 112         config->safe_mode = false;
 113         config->lang = NULL;
 114         config->allow_writes = true;
 115         config->disable_snapshots = false;
 116
 117         config->n_autoboot_opts = 2;
 118         config->autoboot_opts = talloc_array(config, struct autoboot_option,
 119                                                 config->n_autoboot_opts);
 120         config->autoboot_opts[0].boot_type = BOOT_DEVICE_TYPE;
 121         config->autoboot_opts[0].type = DEVICE_TYPE_NETWORK;
 122         config->autoboot_opts[1].boot_type = BOOT_DEVICE_TYPE;
 123         config->autoboot_opts[1].type = DEVICE_TYPE_ANY;
 124
 125         config->ipmi_bootdev = 0;
 126         config->ipmi_bootdev_persistent = false;
 127
 128         config->debug = config_debug_on_cmdline();
 129 }
 130
 131 int platform_init(void *ctx)
 132 {
 133         extern struct platform *__start_platforms,  *__stop_platforms;
 134         struct platform **p;
 135
 136         platform_ctx = talloc_new(ctx);
 137
 138         for (p = &__start_platforms; p < &__stop_platforms; p++) {
 139                 if (!(*p)->probe(*p, platform_ctx))
 140                         continue;
 141                 platform = *p;
 142                 break;
 143         }
 144
 145         config = talloc(platform_ctx, struct config);
 146         config_set_defaults(config);
 147
 148         if (platform) {
 149                 pb_log("Detected platform type: %s\n", platform->name);
 150                 if (platform->load_config)
 151                         platform->load_config(platform, config);
 152         } else {
 153                 pb_log("No platform type detected, some platform-specific "
 154                                 "functionality will be disabled\n");
 155         }
 156
 157         dump_config(config);
 158
 159         return 0;
 160 }
 161
 162 const struct platform *platform_get(void)
 163 {
 164         return platform;
 165 }
 166
 167 void platform_pre_boot(void)
 168 {
 169         const struct config *config = config_get();
 170
 171         if (platform && config && platform->pre_boot)
 172                 platform->pre_boot(platform, config);
 173 }
 174
 175 int platform_get_sysinfo(struct system_info *info)
 176 {
 177         if (platform && platform->get_sysinfo)
 178                 return platform->get_sysinfo(platform, info);
 179         return -1;
 180 }
 181
 182 int config_set(struct config *newconfig)
 183 {
 184         int rc;
 185
 186         if (!platform || !platform->save_config)
 187                 return -1;
 188
 189         if (newconfig == config)
 190                 return 0;
 191
 192         pb_log("new configuration data received\n");
 193         dump_config(newconfig);
 194
 195         rc = platform->save_config(platform, newconfig);
 196
 197         if (!rc)
 198                 config = talloc_steal(platform_ctx, newconfig);
 199         else
 200                 pb_log("error saving new configuration; changes lost\n");
 201
 202         return rc;
 203 }
 204
 205 /* A non-exported function to allow the test infrastructure to initialise
 206  * (and change) the configuration variables */
 207 struct parser_test;
 208 struct config __attribute__((unused)) *test_config_init(
 209                 struct parser_test *test);
 210 struct config *test_config_init(struct parser_test *test)
 211 {
 212         config = talloc(test, struct config);
 213         config_set_defaults(config);
 214         return config;
 215 }
 216
 217 const struct config *config_get(void)
 218 {
 219         return config;
 220 }
 221
 222 void config_set_autoboot(bool autoboot_enabled)
 223 {
 224         config->autoboot_enabled = autoboot_enabled;
 225
 226         pb_log("set autoboot: %s\n",
 227                         config->autoboot_enabled ? "enabled" : "disabled");
 228 }
 229
 230 int platform_fini(void)
 231 {
 232         talloc_free(platform_ctx);
 233         return 0;
 234 }