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         if (config->boot_device)
  66                 pb_log("  boot device %s\n", config->boot_device);
  67
  68         if (config->n_boot_priorities)
  69                 pb_log(" boot priority order:\n");
  70
  71         for (i = 0; i < config->n_boot_priorities; i++) {
  72                 struct boot_priority *prio = &config->boot_priorities[i];
  73                 pb_log(" %10s: %d\n", device_type_name(prio->type),
  74                                         prio->priority);
  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->boot_device = NULL;
 113         config->safe_mode = false;
 114         config->lang = NULL;
 115
 116         config->n_boot_priorities = 2;
 117         config->boot_priorities = talloc_array(config, struct boot_priority,
 118                                                 config->n_boot_priorities);
 119         config->boot_priorities[0].type = DEVICE_TYPE_NETWORK;
 120         config->boot_priorities[0].priority = 0;
 121         config->boot_priorities[1].type = DEVICE_TYPE_ANY;
 122         config->boot_priorities[1].priority = 1;
 123
 124         config->ipmi_bootdev = 0;
 125         config->ipmi_bootdev_persistent = false;
 126
 127         config->debug = config_debug_on_cmdline();
 128 }
 129
 130 int platform_init(void *ctx)
 131 {
 132         extern struct platform *__start_platforms,  *__stop_platforms;
 133         struct platform **p;
 134
 135         platform_ctx = talloc_new(ctx);
 136
 137         for (p = &__start_platforms; p < &__stop_platforms; p++) {
 138                 if (!(*p)->probe(*p, platform_ctx))
 139                         continue;
 140                 platform = *p;
 141                 break;
 142         }
 143
 144         config = talloc(platform_ctx, struct config);
 145         config_set_defaults(config);
 146
 147         if (platform) {
 148                 pb_log("Detected platform type: %s\n", platform->name);
 149                 if (platform->load_config)
 150                         platform->load_config(platform, config);
 151         } else {
 152                 pb_log("No platform type detected, some platform-specific "
 153                                 "functionality will be disabled\n");
 154         }
 155
 156         dump_config(config);
 157
 158         return 0;
 159 }
 160
 161 const struct platform *platform_get(void)
 162 {
 163         return platform;
 164 }
 165
 166 void platform_pre_boot(void)
 167 {
 168         const struct config *config = config_get();
 169
 170         if (platform && config && platform->pre_boot)
 171                 platform->pre_boot(platform, config);
 172 }
 173
 174 int platform_get_sysinfo(struct system_info *info)
 175 {
 176         if (platform && platform->get_sysinfo)
 177                 return platform->get_sysinfo(platform, info);
 178         return -1;
 179 }
 180
 181 int config_set(struct config *newconfig)
 182 {
 183         int rc;
 184
 185         if (!platform || !platform->save_config)
 186                 return -1;
 187
 188         if (newconfig == config)
 189                 return 0;
 190
 191         pb_log("new configuration data received\n");
 192         dump_config(newconfig);
 193
 194         rc = platform->save_config(platform, newconfig);
 195
 196         if (!rc)
 197                 config = talloc_steal(platform_ctx, newconfig);
 198         else
 199                 pb_log("error saving new configuration; changes lost\n");
 200
 201         return rc;
 202 }
 203
 204 /* A non-exported function to allow the test infrastructure to initialise
 205  * (and change) the configuration variables */
 206 struct parser_test;
 207 struct config __attribute__((unused)) *test_config_init(
 208                 struct parser_test *test);
 209 struct config *test_config_init(struct parser_test *test)
 210 {
 211         config = talloc(test, struct config);
 212         config_set_defaults(config);
 213         return config;
 214 }
 215
 216 const struct config *config_get(void)
 217 {
 218         return config;
 219 }
 220
 221 void config_set_autoboot(bool autoboot_enabled)
 222 {
 223         config->autoboot_enabled = autoboot_enabled;
 224
 225         pb_log("set autoboot: %s\n",
 226                         config->autoboot_enabled ? "enabled" : "disabled");
 227 }
 228
 229 int platform_fini(void)
 230 {
 231         talloc_free(platform_ctx);
 232         return 0;
 233 }