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