10 #include <sys/types.h>
13 #include <pb-protocol/pb-protocol.h>
14 #include <process/process.h>
15 #include <system/system.h>
16 #include <talloc/talloc.h>
19 #include "device-handler.h"
24 static const char *boot_hook_dir = PKG_SYSCONF_DIR "/boot.d";
26 BOOT_HOOK_EXIT_OK = 0,
27 BOOT_HOOK_EXIT_UPDATE = 2,
41 * kexec_load - kexec load helper.
43 static int kexec_load(struct boot_task *boot_task)
48 char *s_initrd = NULL;
53 *p++ = pb_system_apps.kexec; /* 1 */
56 if (boot_task->local_initrd) {
57 s_initrd = talloc_asprintf(boot_task, "--initrd=%s",
58 boot_task->local_initrd);
60 *p++ = s_initrd; /* 3 */
63 if (boot_task->local_dtb) {
64 s_dtb = talloc_asprintf(boot_task, "--dtb=%s",
65 boot_task->local_dtb);
70 if (boot_task->args) {
71 s_args = talloc_asprintf(boot_task, "--append=%s",
74 *p++ = s_args; /* 5 */
77 *p++ = boot_task->local_image; /* 6 */
80 result = pb_run_cmd(argv, 1, boot_task->dry_run);
83 pb_log("%s: failed: (%d)\n", __func__, result);
89 * kexec_reboot - Helper to boot the new kernel.
91 * Must only be called after a successful call to kexec_load().
94 static int kexec_reboot(bool dry_run)
100 /* First try running shutdown. Init scripts should run 'exec -e' */
103 *p++ = pb_system_apps.shutdown; /* 1 */
105 *p++ = "now"; /* 3 */
108 result = pb_run_cmd(argv, 1, dry_run);
110 /* On error, force a kexec with the -e option */
114 *p++ = pb_system_apps.kexec; /* 1 */
118 result = pb_run_cmd(argv, 1, 0);
122 pb_log("%s: failed: (%d)\n", __func__, result);
124 /* okay, kexec -e -f */
127 *p++ = pb_system_apps.kexec; /* 1 */
132 result = pb_run_cmd(argv, 1, 0);
136 pb_log("%s: failed: (%d)\n", __func__, result);
142 static void update_status(boot_status_fn fn, void *arg, int type,
145 struct boot_status status;
148 status.message = message;
149 status.progress = -1;
150 status.detail = NULL;
155 static void boot_hook_update_param(void *ctx, struct boot_task *task,
156 const char *name, const char *value)
161 } *param, params[] = {
162 { "boot_image", &task->local_image },
163 { "boot_initrd", &task->local_initrd },
164 { "boot_dtb", &task->local_dtb },
165 { "boot_args", &task->args },
169 for (param = params; param->name; param++) {
170 if (strcmp(param->name, name))
173 *param->p = talloc_strdup(ctx, value);
178 static void boot_hook_update(struct boot_task *task, const char *hookname,
181 char *line, *name, *val, *sep;
184 for (;; buf = NULL) {
186 line = strtok_r(buf, "\n", &saveptr);
190 sep = strchr(line, '=');
198 boot_hook_update_param(task, task, name, val);
200 pb_log("boot hook %s specified %s=%s\n",
201 hookname, name, val);
205 static void boot_hook_setenv(struct boot_task *task)
207 unsetenv("boot_image");
208 unsetenv("boot_initrd");
209 unsetenv("boot_dtb");
210 unsetenv("boot_args");
212 setenv("boot_image", task->local_image, 1);
213 if (task->local_initrd)
214 setenv("boot_initrd", task->local_initrd, 1);
216 setenv("boot_dtb", task->local_dtb, 1);
218 setenv("boot_args", task->args, 1);
221 static int hook_filter(const struct dirent *dirent)
223 return dirent->d_type == DT_REG || dirent->d_type == DT_LNK;
226 static int hook_cmp(const struct dirent **a, const struct dirent **b)
228 return strcmp((*a)->d_name, (*b)->d_name);
231 static void run_boot_hooks(struct boot_task *task, boot_status_fn status_fn,
234 struct dirent **hooks;
237 n = scandir(boot_hook_dir, &hooks, hook_filter, hook_cmp);
241 update_status(status_fn, status_arg, BOOT_STATUS_INFO,
242 "running boot hooks");
244 boot_hook_setenv(task);
246 for (i = 0; i < n; i++) {
247 const char *argv[2] = { NULL, NULL };
248 struct process *process;
252 path = join_paths(task, boot_hook_dir, hooks[i]->d_name);
254 if (access(path, X_OK)) {
259 process = process_create(task);
262 process->path = path;
263 process->argv = argv;
264 process->keep_stdout = true;
266 pb_log("running boot hook %s\n", hooks[i]->d_name);
268 rc = process_run_sync(process);
270 pb_log("boot hook exec failed!\n");
272 } else if (WIFEXITED(process->exit_status) &&
273 WEXITSTATUS(process->exit_status)
274 == BOOT_HOOK_EXIT_UPDATE) {
275 /* if the hook returned with BOOT_HOOK_EXIT_UPDATE,
276 * then we process stdout to look for updated params
278 if (rc == BOOT_HOOK_EXIT_UPDATE) {
279 boot_hook_update(task, hooks[i]->d_name,
280 process->stdout_buf);
281 boot_hook_setenv(task);
285 process_release(process);
292 int boot(void *ctx, struct discover_boot_option *opt, struct boot_command *cmd,
293 int dry_run, boot_status_fn status_fn, void *status_arg)
295 struct boot_task *boot_task;
296 struct pb_url *image, *initrd, *dtb;
297 unsigned int clean_image = 0;
298 unsigned int clean_initrd = 0;
299 unsigned int clean_dtb = 0;
306 if (cmd && cmd->boot_image_file) {
307 image = pb_url_parse(opt, cmd->boot_image_file);
308 } else if (opt && opt->boot_image) {
309 image = opt->boot_image->url;
311 pb_log("%s: no image specified", __func__);
315 boot_task = talloc_zero(ctx, struct boot_task);
316 boot_task->dry_run = dry_run;
318 if (cmd && cmd->initrd_file) {
319 initrd = pb_url_parse(opt, cmd->initrd_file);
320 } else if (opt && opt->initrd) {
321 initrd = opt->initrd->url;
324 if (cmd && cmd->dtb_file) {
325 dtb = pb_url_parse(opt, cmd->dtb_file);
326 } else if (opt && opt->dtb) {
330 if (cmd && cmd->boot_args) {
331 boot_task->args = talloc_strdup(boot_task, cmd->boot_args);
332 } else if (opt && opt->option->boot_args) {
333 boot_task->args = talloc_strdup(boot_task,
334 opt->option->boot_args);
336 boot_task->args = NULL;
341 update_status(status_fn, status_arg, BOOT_STATUS_INFO,
343 boot_task->local_image = load_url(NULL, image, &clean_image);
344 if (!boot_task->local_image) {
345 update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
346 "Couldn't load kernel image");
351 update_status(status_fn, status_arg, BOOT_STATUS_INFO,
353 boot_task->local_initrd = load_url(NULL, initrd, &clean_initrd);
354 if (!boot_task->local_initrd) {
355 update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
356 "Couldn't load initrd image");
362 update_status(status_fn, status_arg, BOOT_STATUS_INFO,
363 "loading device tree");
364 boot_task->local_dtb = load_url(NULL, dtb, &clean_dtb);
365 if (!boot_task->local_dtb) {
366 update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
367 "Couldn't load device tree");
372 run_boot_hooks(boot_task, status_fn, status_arg);
374 update_status(status_fn, status_arg, BOOT_STATUS_INFO,
375 "performing kexec_load");
377 result = kexec_load(boot_task);
380 update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
381 "kexec load failed");
386 unlink(boot_task->local_image);
388 unlink(boot_task->local_initrd);
390 unlink(boot_task->local_dtb);
392 talloc_free(boot_task);
395 update_status(status_fn, status_arg, BOOT_STATUS_INFO,
396 "performing kexec reboot");
398 result = kexec_reboot(boot_task->dry_run);
401 update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
402 "kexec reboot failed");