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