95a905d6ec82eac746c1bd6d38f928d34c4f4aa1
[petitboot] / discover / platform.c
1
2 #define _GNU_SOURCE
3
4 #include <fcntl.h>
5 #include <string.h>
6 #include <locale.h>
7
8 #include <log/log.h>
9 #include <file/file.h>
10 #include <types/types.h>
11 #include <talloc/talloc.h>
12
13 #include "platform.h"
14
15 void                    *platform_ctx;
16 static struct platform  *platform;
17 static struct config    *config;
18
19 static const char *kernel_cmdline_debug = "petitboot.debug";
20
21 static void dump_config(struct config *config)
22 {
23         unsigned int i;
24
25         pb_log("configuration:\n");
26
27         if (config->autoboot_enabled)
28                 pb_log(" autoboot: enabled, %d sec\n",
29                                 config->autoboot_timeout_sec);
30         else
31                 pb_log(" autoboot: disabled\n");
32
33         if (config->network.n_interfaces || config->network.n_dns_servers)
34                 pb_log(" network configuration:\n");
35
36         if (config->safe_mode)
37                 pb_log(" safe mode: active\n");
38
39         if (config->disable_snapshots)
40                 pb_log(" dm-snapshots disabled\n");
41
42         for (i = 0; i < config->network.n_interfaces; i++) {
43                 struct interface_config *ifconf =
44                         config->network.interfaces[i];
45
46                 pb_log("  interface %02x:%02x:%02x:%02x:%02x:%02x\n",
47                                 ifconf->hwaddr[0], ifconf->hwaddr[1],
48                                 ifconf->hwaddr[2], ifconf->hwaddr[3],
49                                 ifconf->hwaddr[4], ifconf->hwaddr[5]);
50
51                 if (ifconf->ignore) {
52                         pb_log("   ignore\n");
53                         continue;
54                 }
55
56                 if (ifconf->method == CONFIG_METHOD_DHCP) {
57                         pb_log("   dhcp\n");
58
59                 } else if (ifconf->method == CONFIG_METHOD_STATIC) {
60                         pb_log("   static:\n");
61                         pb_log("    ip:  %s\n", ifconf->static_config.address);
62                         pb_log("    gw:  %s\n", ifconf->static_config.gateway);
63                         pb_log("    url:  %s\n", ifconf->static_config.url);
64
65                 }
66         }
67         for (i = 0; i < config->network.n_dns_servers; i++)
68                 pb_log("  dns server %s\n", config->network.dns_servers[i]);
69
70         for (i = 0; i < config->n_autoboot_opts; i++) {
71                 if (config->autoboot_opts[i].boot_type == BOOT_DEVICE_TYPE)
72                         pb_log("  boot device %d: %s\n", i,
73                                device_type_name(config->autoboot_opts[i].type));
74                 else
75                         pb_log("  boot device %d: uuid: %s\n",
76                                i, config->autoboot_opts[i].uuid);
77         }
78
79         pb_log("  IPMI boot device 0x%02x%s\n", config->ipmi_bootdev,
80                         config->ipmi_bootdev_persistent ? " (persistent)" : "");
81
82         pb_log("  Modifications allowed to disks: %s\n",
83                         config->allow_writes ? "yes" : "no");
84
85         pb_log("  Default UI to boot on: %s\n",
86                 config->boot_console ?: "none set");
87
88
89         pb_log(" language: %s\n", config->lang ?: "");
90 }
91
92 static bool config_debug_on_cmdline(void)
93 {
94         char buf[600];
95         int rc, fd;
96
97         fd = open("/proc/cmdline", O_RDONLY);
98         if (fd < 0)
99                 return false;
100
101         rc = read(fd, buf, sizeof(buf));
102         close(fd);
103
104         if (rc <= 0)
105                 return false;
106
107         return memmem(buf, rc, kernel_cmdline_debug,
108                         strlen(kernel_cmdline_debug)) != NULL;
109 }
110
111 void config_set_defaults(struct config *config)
112 {
113         const char *lang;
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->safe_mode = false;
123         config->allow_writes = true;
124         config->disable_snapshots = false;
125
126         config->n_consoles = 0;
127         config->consoles = NULL;
128         config->boot_console = NULL;
129
130         config->n_autoboot_opts = 2;
131         config->autoboot_opts = talloc_array(config, struct autoboot_option,
132                                                 config->n_autoboot_opts);
133         config->autoboot_opts[0].boot_type = BOOT_DEVICE_TYPE;
134         config->autoboot_opts[0].type = DEVICE_TYPE_NETWORK;
135         config->autoboot_opts[1].boot_type = BOOT_DEVICE_TYPE;
136         config->autoboot_opts[1].type = DEVICE_TYPE_ANY;
137
138         config->ipmi_bootdev = 0;
139         config->ipmi_bootdev_persistent = false;
140
141         config->debug = config_debug_on_cmdline();
142
143         lang = setlocale(LC_ALL, NULL);
144         pb_log("lang: %s\n", lang);
145         if (lang && strlen(lang))
146                 config->lang = talloc_strdup(config, lang);
147         else
148                 config->lang = NULL;
149
150 }
151
152 int platform_init(void *ctx)
153 {
154         extern struct platform *__start_platforms,  *__stop_platforms;
155         struct platform **p;
156
157         platform_ctx = talloc_new(ctx);
158
159         for (p = &__start_platforms; p < &__stop_platforms; p++) {
160                 if (!(*p)->probe(*p, platform_ctx))
161                         continue;
162                 platform = *p;
163                 break;
164         }
165
166         config = talloc(platform_ctx, struct config);
167         config_set_defaults(config);
168
169         if (platform) {
170                 pb_log("Detected platform type: %s\n", platform->name);
171                 if (platform->load_config)
172                         platform->load_config(platform, config);
173         } else {
174                 pb_log("No platform type detected, some platform-specific "
175                                 "functionality will be disabled\n");
176         }
177
178         dump_config(config);
179
180         return 0;
181 }
182
183 const struct platform *platform_get(void)
184 {
185         return platform;
186 }
187
188 void platform_pre_boot(void)
189 {
190         const struct config *config = config_get();
191
192         if (platform && config && platform->pre_boot)
193                 platform->pre_boot(platform, config);
194 }
195
196 int platform_get_sysinfo(struct system_info *info)
197 {
198         if (platform && platform->get_sysinfo)
199                 return platform->get_sysinfo(platform, info);
200         return -1;
201 }
202
203 int config_set(struct config *newconfig)
204 {
205         int rc;
206
207         if (!platform || !platform->save_config)
208                 return -1;
209
210         if (newconfig == config)
211                 return 0;
212
213         pb_log("new configuration data received\n");
214         dump_config(newconfig);
215
216         rc = platform->save_config(platform, newconfig);
217
218         if (!rc)
219                 config = talloc_steal(platform_ctx, newconfig);
220         else
221                 pb_log("error saving new configuration; changes lost\n");
222
223         return rc;
224 }
225
226 /* A non-exported function to allow the test infrastructure to initialise
227  * (and change) the configuration variables */
228 struct parser_test;
229 struct config __attribute__((unused)) *test_config_init(
230                 struct parser_test *test);
231 struct config *test_config_init(struct parser_test *test)
232 {
233         config = talloc(test, struct config);
234         config_set_defaults(config);
235         return config;
236 }
237
238 const struct config *config_get(void)
239 {
240         return config;
241 }
242
243 void config_set_autoboot(bool autoboot_enabled)
244 {
245         config->autoboot_enabled = autoboot_enabled;
246
247         pb_log("set autoboot: %s\n",
248                         config->autoboot_enabled ? "enabled" : "disabled");
249 }
250
251 int platform_fini(void)
252 {
253         talloc_free(platform_ctx);
254         return 0;
255 }