2 #if defined(HAVE_CONFIG_H)
12 #include <sys/types.h>
15 #include <pb-protocol/pb-protocol.h>
16 #include <process/process.h>
17 #include <system/system.h>
18 #include <talloc/talloc.h>
20 #include <util/util.h>
21 #include <i18n/i18n.h>
23 #include "device-handler.h"
29 #include <security/gpg.h>
31 static const char *boot_hook_dir = PKG_SYSCONF_DIR "/boot.d";
33 BOOT_HOOK_EXIT_OK = 0,
34 BOOT_HOOK_EXIT_UPDATE = 2,
37 static void __attribute__((format(__printf__, 4, 5))) update_status(
38 boot_status_fn fn, void *arg, int type, char *fmt, ...)
44 status.message = talloc_vasprintf(NULL, fmt, ap);
48 status.backlog = false;
50 pb_debug("boot status: [%d] %s\n", type, status.message);
54 talloc_free(status.message);
58 * kexec_load - kexec load helper.
60 static int kexec_load(struct boot_task *boot_task)
62 struct process *process;
63 char *s_initrd = NULL;
71 boot_task->local_initrd_override = NULL;
72 boot_task->local_dtb_override = NULL;
73 boot_task->local_image_override = NULL;
75 if ((result = gpg_validate_boot_files(boot_task))) {
76 if (result == KEXEC_LOAD_DECRYPTION_FALURE) {
77 pb_log("%s: Aborting kexec due to"
78 " decryption failure\n", __func__);
81 if (result == KEXEC_LOAD_SIGNATURE_FAILURE) {
82 pb_log("%s: Aborting kexec due to signature"
83 " verification failure\n", __func__);
88 const char* local_initrd = (boot_task->local_initrd_override) ?
89 boot_task->local_initrd_override : boot_task->local_initrd;
90 const char* local_dtb = (boot_task->local_dtb_override) ?
91 boot_task->local_dtb_override : boot_task->local_dtb;
92 const char* local_image = (boot_task->local_image_override) ?
93 boot_task->local_image_override : boot_task->local_image;
95 process = process_create(boot_task);
97 pb_log("%s: failed to create process\n", __func__);
101 process->path = pb_system_apps.kexec;
102 process->argv = argv;
103 process->keep_stdout = true;
104 process->add_stderr = true;
107 *p++ = pb_system_apps.kexec; /* 1 */
111 s_initrd = talloc_asprintf(boot_task, "--initrd=%s",
114 *p++ = s_initrd; /* 3 */
118 s_dtb = talloc_asprintf(boot_task, "--dtb=%s",
121 *p++ = s_dtb; /* 4 */
124 s_args = talloc_asprintf(boot_task, "--append=%s",
125 boot_task->args ?: "\"\"");
127 *p++ = s_args; /* 5 */
129 *p++ = local_image; /* 6 */
132 result = process_run_sync(process);
134 pb_log("%s: failed to run process\n", __func__);
138 result = process->exit_status;
141 pb_log("%s: failed: (%d)\n", __func__, result);
142 update_status(boot_task->status_fn, boot_task->status_arg,
143 STATUS_ERROR, "%s", process->stdout_buf);
147 gpg_validate_boot_files_cleanup(boot_task);
153 * kexec_reboot - Helper to boot the new kernel.
155 * Must only be called after a successful call to kexec_load().
158 static int kexec_reboot(struct boot_task *task)
162 /* First try running shutdown. Init scripts should run 'exec -e' */
163 result = process_run_simple(task, pb_system_apps.shutdown, "-r",
166 /* On error, force a kexec with the -e option */
168 result = process_run_simple(task, pb_system_apps.kexec,
173 pb_log("%s: failed: (%d)\n", __func__, result);
175 /* okay, kexec -e -f */
177 result = process_run_simple(task, pb_system_apps.kexec,
182 pb_log("%s: failed: (%d)\n", __func__, result);
188 static void boot_hook_update_param(void *ctx, struct boot_task *task,
189 const char *name, const char *value)
194 } *param, params[] = {
195 { "boot_image", &task->local_image },
196 { "boot_initrd", &task->local_initrd },
197 { "boot_dtb", &task->local_dtb },
198 { "boot_args", &task->args },
202 for (param = params; param->name; param++) {
203 if (strcmp(param->name, name))
206 *param->p = talloc_strdup(ctx, value);
211 static void boot_hook_update(struct boot_task *task, const char *hookname,
214 char *line, *name, *val, *sep;
215 char *saveptr = NULL;
217 for (;; buf = NULL) {
219 line = strtok_r(buf, "\n", &saveptr);
223 sep = strchr(line, '=');
231 boot_hook_update_param(task, task, name, val);
233 pb_log("boot hook %s specified %s=%s\n",
234 hookname, name, val);
238 static void boot_hook_setenv(struct boot_task *task)
240 unsetenv("boot_image");
241 unsetenv("boot_initrd");
242 unsetenv("boot_dtb");
243 unsetenv("boot_args");
244 unsetenv("boot_console");
246 setenv("boot_image", task->local_image, 1);
247 if (task->local_initrd)
248 setenv("boot_initrd", task->local_initrd, 1);
250 setenv("boot_dtb", task->local_dtb, 1);
252 setenv("boot_args", task->args, 1);
253 if (task->boot_console)
254 setenv("boot_console", task->boot_console, 1);
257 static int hook_filter(const struct dirent *dirent)
259 return dirent->d_type == DT_REG || dirent->d_type == DT_LNK;
262 static int hook_cmp(const struct dirent **a, const struct dirent **b)
264 return strcmp((*a)->d_name, (*b)->d_name);
267 static void run_boot_hooks(struct boot_task *task)
269 struct dirent **hooks;
272 n = scandir(boot_hook_dir, &hooks, hook_filter, hook_cmp);
276 update_status(task->status_fn, task->status_arg, STATUS_INFO,
277 _("Running boot hooks"));
279 boot_hook_setenv(task);
281 for (i = 0; i < n; i++) {
282 const char *argv[2] = { NULL, NULL };
283 struct process *process;
287 path = join_paths(task, boot_hook_dir, hooks[i]->d_name);
289 if (access(path, X_OK)) {
294 process = process_create(task);
297 process->path = path;
298 process->argv = argv;
299 process->keep_stdout = true;
301 pb_log("running boot hook %s\n", hooks[i]->d_name);
303 rc = process_run_sync(process);
305 pb_log("boot hook exec failed!\n");
307 } else if (WIFEXITED(process->exit_status) &&
308 WEXITSTATUS(process->exit_status)
309 == BOOT_HOOK_EXIT_UPDATE) {
310 /* if the hook returned with BOOT_HOOK_EXIT_UPDATE,
311 * then we process stdout to look for updated params
313 boot_hook_update(task, hooks[i]->d_name,
314 process->stdout_buf);
315 boot_hook_setenv(task);
318 process_release(process);
325 static bool load_pending(struct load_url_result *result)
327 return !result || result->status == LOAD_ASYNC;
330 static int check_load(struct boot_task *task, const char *name,
331 struct load_url_result *result)
336 if (result->status != LOAD_ERROR) {
337 update_status(task->status_fn, task->status_arg,
339 _("Loaded %s from %s"), name,
340 pb_url_to_string(result->url));
344 update_status(task->status_fn, task->status_arg,
346 _("Couldn't load %s from %s"), name,
347 pb_url_to_string(result->url));
351 static void cleanup_load(struct load_url_result *result)
355 if (result->status != LOAD_OK)
357 if (!result->cleanup_local)
359 unlink(result->local);
362 static void cleanup_cancellations(struct boot_task *task,
363 struct load_url_result *cur_result)
365 struct load_url_result *result, **results[] = {
366 &task->image, &task->initrd, &task->dtb,
368 bool pending = false;
371 for (i = 0; i < ARRAY_SIZE(results); i++) {
372 result = *results[i];
377 /* We need to cleanup and free any completed loads */
378 if (result == cur_result || result->status == LOAD_OK
379 || result->status == LOAD_ERROR) {
380 cleanup_load(result);
384 /* ... and cancel any pending loads, which we'll free in
385 * the completion callback */
386 } else if (result->status == LOAD_ASYNC) {
387 load_url_async_cancel(result);
390 /* if we're waiting for a cancellation, we still need to
391 * wait for the completion before freeing the boot task */
392 } else if (result->status == LOAD_CANCELLED) {
401 static void boot_process(struct load_url_result *result, void *data)
403 struct boot_task *task = data;
404 struct boot_resource *resource;
407 if (task->cancelled) {
408 cleanup_cancellations(task, result);
412 list_for_each_entry(&task->resources, resource, list)
413 if (load_pending(resource->result))
416 list_for_each_entry(&task->resources, resource, list) {
417 if (check_load(task, resource->name, resource->result))
419 *resource->local_path = resource->result->local;
422 run_boot_hooks(task);
424 update_status(task->status_fn, task->status_arg, STATUS_INFO,
425 _("Performing kexec load"));
427 rc = kexec_load(task);
428 pb_log("%s: kexec_load returned %d\n", __func__, rc);
429 if (rc == KEXEC_LOAD_DECRYPTION_FALURE) {
430 update_status(task->status_fn, task->status_arg,
431 STATUS_ERROR, _("Decryption failed"));
433 else if (rc == KEXEC_LOAD_SIGNATURE_FAILURE) {
434 update_status(task->status_fn, task->status_arg,
436 _("Signature verification failed"));
438 else if (rc == KEXEC_LOAD_SIG_SETUP_INVALID) {
439 update_status(task->status_fn, task->status_arg,
441 _("Invalid signature configuration"));
445 list_for_each_entry(&task->resources, resource, list)
446 cleanup_load(resource->result);
449 update_status(task->status_fn, task->status_arg,
450 STATUS_INFO, _("Performing kexec reboot"));
452 rc = kexec_reboot(task);
454 update_status(task->status_fn, task->status_arg,
456 _("kexec reboot failed"));
461 static int start_url_load(struct boot_task *task, struct boot_resource *res)
466 res->result = load_url_async(task, res->url, boot_process,
467 task, NULL, task->status_arg);
469 update_status(task->status_fn, task->status_arg,
470 STATUS_ERROR, _("Error loading %s"),
477 static struct boot_resource *add_boot_resource(struct boot_task *task,
478 const char *name, struct pb_url *url,
479 const char **local_path)
481 struct boot_resource *res;
486 res = talloc_zero(task, struct boot_resource);
490 res->name = talloc_strdup(res, name);
491 res->url = pb_url_copy(res, url);
492 res->local_path = local_path;
494 list_add(&task->resources, &res->list);
498 struct boot_task *boot(void *ctx, struct discover_boot_option *opt,
499 struct boot_command *cmd, int dry_run,
500 boot_status_fn status_fn, void *status_arg)
502 struct pb_url *image = NULL, *initrd = NULL, *dtb = NULL;
503 struct pb_url *image_sig = NULL, *initrd_sig = NULL, *dtb_sig = NULL,
505 struct boot_resource *image_res, *initrd_res, *dtb_res, *tmp;
506 const struct config *config = config_get();
507 struct boot_task *boot_task;
508 const char *boot_desc;
512 if (opt && opt->option->name)
513 boot_desc = opt->option->name;
514 else if (cmd && cmd->boot_image_file)
515 boot_desc = cmd->boot_image_file;
517 boot_desc = _("(unknown)");
519 update_status(status_fn, status_arg, STATUS_INFO,
520 _("Booting %s"), boot_desc);
522 if (cmd && cmd->boot_image_file) {
523 image = pb_url_parse(opt, cmd->boot_image_file);
524 } else if (opt && opt->boot_image) {
525 image = opt->boot_image->url;
527 pb_log("%s: no image specified\n", __func__);
528 update_status(status_fn, status_arg, STATUS_INFO,
529 _("Boot failed: no image specified"));
533 if (cmd && cmd->initrd_file) {
534 initrd = pb_url_parse(opt, cmd->initrd_file);
535 } else if (opt && opt->initrd) {
536 initrd = opt->initrd->url;
539 if (cmd && cmd->dtb_file) {
540 dtb = pb_url_parse(opt, cmd->dtb_file);
541 } else if (opt && opt->dtb) {
545 if (opt && opt->proxy) {
546 setenv("http_proxy", opt->proxy, 1);
547 setenv("https_proxy", opt->proxy, 1);
550 boot_task = talloc_zero(ctx, struct boot_task);
551 boot_task->dry_run = dry_run;
552 boot_task->status_fn = status_fn;
553 boot_task->status_arg = status_arg;
554 list_init(&boot_task->resources);
556 lockdown_type = lockdown_status();
557 boot_task->verify_signature = (lockdown_type == PB_LOCKDOWN_SIGN);
558 boot_task->decrypt_files = (lockdown_type == PB_LOCKDOWN_DECRYPT);
560 if (cmd && cmd->boot_args) {
561 boot_task->args = talloc_strdup(boot_task, cmd->boot_args);
562 } else if (opt && opt->option->boot_args) {
563 boot_task->args = talloc_strdup(boot_task,
564 opt->option->boot_args);
566 boot_task->args = NULL;
569 if (cmd && cmd->console && !config->manual_console)
570 boot_task->boot_console = talloc_strdup(boot_task, cmd->console);
572 boot_task->boot_console = config ? config->boot_console : NULL;
574 if (boot_task->verify_signature || boot_task->decrypt_files) {
575 if (cmd && cmd->args_sig_file) {
576 cmdline_sig = pb_url_parse(opt, cmd->args_sig_file);
577 } else if (opt && opt->args_sig_file) {
578 cmdline_sig = opt->args_sig_file->url;
580 pb_log("%s: no command line signature file"
581 " specified\n", __func__);
582 update_status(status_fn, status_arg, STATUS_INFO,
583 _("Boot failed: no command line"
584 " signature file specified"));
585 talloc_free(boot_task);
590 image_res = add_boot_resource(boot_task, _("kernel image"), image,
591 &boot_task->local_image);
592 initrd_res = add_boot_resource(boot_task, _("initrd"), initrd,
593 &boot_task->local_initrd);
594 dtb_res = add_boot_resource(boot_task, _("dtb"), dtb,
595 &boot_task->local_dtb);
597 /* start async loads for boot resources */
598 rc = start_url_load(boot_task, image_res)
599 || start_url_load(boot_task, initrd_res)
600 || start_url_load(boot_task, dtb_res);
602 if (boot_task->verify_signature) {
603 /* Generate names of associated signature files and load */
605 image_sig = gpg_get_signature_url(ctx, image);
606 tmp = add_boot_resource(boot_task,
607 _("kernel image signature"), image_sig,
608 &boot_task->local_image_signature);
609 rc |= start_url_load(boot_task, tmp);
612 initrd_sig = gpg_get_signature_url(ctx, initrd);
613 tmp = add_boot_resource(boot_task,
614 _("initrd signature"), initrd_sig,
615 &boot_task->local_initrd_signature);
616 rc |= start_url_load(boot_task, tmp);
619 dtb_sig = gpg_get_signature_url(ctx, dtb);
620 tmp = add_boot_resource(boot_task,
621 _("dtb signature"), dtb_sig,
622 &boot_task->local_dtb_signature);
623 rc |= start_url_load(boot_task, tmp);
627 if (boot_task->verify_signature || boot_task->decrypt_files) {
628 tmp = add_boot_resource(boot_task,
629 _("kernel command line signature"), cmdline_sig,
630 &boot_task->local_cmdline_signature);
631 rc |= start_url_load(boot_task, tmp);
634 /* If all URLs are local, we may be done. */
636 /* Don't call boot_cancel() to preserve the status update */
637 boot_task->cancelled = true;
638 cleanup_cancellations(boot_task, NULL);
642 boot_process(NULL, boot_task);
647 void boot_cancel(struct boot_task *task)
649 task->cancelled = true;
651 update_status(task->status_fn, task->status_arg, STATUS_INFO,
652 _("Boot cancelled"));
654 cleanup_cancellations(task, NULL);