Consolidate petitboot,tty and petitboot,console
[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         if (config->manual_console)
88                 pb_log("    (Manually set)\n");
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         const char *lang;
116
117         config->autoboot_enabled = true;
118         config->autoboot_timeout_sec = 10;
119         config->autoboot_enabled = true;
120         config->network.interfaces = NULL;
121         config->network.n_interfaces = 0;
122         config->network.dns_servers = NULL;
123         config->network.n_dns_servers = 0;
124         config->safe_mode = false;
125         config->allow_writes = true;
126         config->disable_snapshots = false;
127
128         config->n_consoles = 0;
129         config->consoles = NULL;
130         config->boot_console = NULL;
131
132         config->n_autoboot_opts = 2;
133         config->autoboot_opts = talloc_array(config, struct autoboot_option,
134                                                 config->n_autoboot_opts);
135         config->autoboot_opts[0].boot_type = BOOT_DEVICE_TYPE;
136         config->autoboot_opts[0].type = DEVICE_TYPE_NETWORK;
137         config->autoboot_opts[1].boot_type = BOOT_DEVICE_TYPE;
138         config->autoboot_opts[1].type = DEVICE_TYPE_ANY;
139
140         config->ipmi_bootdev = 0;
141         config->ipmi_bootdev_persistent = false;
142
143         config->debug = config_debug_on_cmdline();
144
145         lang = setlocale(LC_ALL, NULL);
146         pb_log("lang: %s\n", lang);
147         if (lang && strlen(lang))
148                 config->lang = talloc_strdup(config, lang);
149         else
150                 config->lang = NULL;
151
152 }
153
154 int platform_init(void *ctx)
155 {
156         extern struct platform *__start_platforms,  *__stop_platforms;
157         struct platform **p;
158
159         platform_ctx = talloc_new(ctx);
160
161         for (p = &__start_platforms; p < &__stop_platforms; p++) {
162                 if (!(*p)->probe(*p, platform_ctx))
163                         continue;
164                 platform = *p;
165                 break;
166         }
167
168         config = talloc(platform_ctx, struct config);
169         config_set_defaults(config);
170
171         if (platform) {
172                 pb_log("Detected platform type: %s\n", platform->name);
173                 if (platform->load_config)
174                         platform->load_config(platform, config);
175         } else {
176                 pb_log("No platform type detected, some platform-specific "
177                                 "functionality will be disabled\n");
178         }
179
180         dump_config(config);
181
182         return 0;
183 }
184
185 const struct platform *platform_get(void)
186 {
187         return platform;
188 }
189
190 void platform_pre_boot(void)
191 {
192         const struct config *config = config_get();
193
194         if (platform && config && platform->pre_boot)
195                 platform->pre_boot(platform, config);
196 }
197
198 int platform_get_sysinfo(struct system_info *info)
199 {
200         if (platform && platform->get_sysinfo)
201                 return platform->get_sysinfo(platform, info);
202         return -1;
203 }
204
205 int config_set(struct config *newconfig)
206 {
207         int rc;
208
209         if (!platform || !platform->save_config)
210                 return -1;
211
212         if (newconfig == config)
213                 return 0;
214
215         pb_log("new configuration data received\n");
216         dump_config(newconfig);
217
218         rc = platform->save_config(platform, newconfig);
219
220         if (!rc)
221                 config = talloc_steal(platform_ctx, newconfig);
222         else
223                 pb_log("error saving new configuration; changes lost\n");
224
225         return rc;
226 }
227
228 /* A non-exported function to allow the test infrastructure to initialise
229  * (and change) the configuration variables */
230 struct parser_test;
231 struct config __attribute__((unused)) *test_config_init(
232                 struct parser_test *test);
233 struct config *test_config_init(struct parser_test *test)
234 {
235         config = talloc(test, struct config);
236         config_set_defaults(config);
237         return config;
238 }
239
240 const struct config *config_get(void)
241 {
242         return config;
243 }
244
245 void config_set_autoboot(bool autoboot_enabled)
246 {
247         config->autoboot_enabled = autoboot_enabled;
248
249         pb_log("set autoboot: %s\n",
250                         config->autoboot_enabled ? "enabled" : "disabled");
251 }
252
253 int platform_fini(void)
254 {
255         talloc_free(platform_ctx);
256         return 0;
257 }