X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fboot.c;h=0da40e3d8f4b11d6f13b20c2147ef5a3dfd521a3;hp=c922fb62c8de28587e9b893990c3bfec36914529;hb=0460a745e355158559c01b25f8138404f21b5d92;hpb=c11bcba9a99e858e618f4d872a5be7d52dcaaa5a;ds=sidebyside

diff --git a/discover/boot.c b/discover/boot.c
index c922fb6..0da40e3 100644
--- a/discover/boot.c
+++ b/discover/boot.c
@@ -1,68 +1,150 @@
 
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
+
+#include <stdbool.h>
+#include <stdlib.h>
 #include <assert.h>
+#include <dirent.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/types.h>
 
 #include <log/log.h>
 #include <pb-protocol/pb-protocol.h>
+#include <process/process.h>
 #include <system/system.h>
 #include <talloc/talloc.h>
 #include <url/url.h>
+#include <util/util.h>
+#include <i18n/i18n.h>
 
 #include "device-handler.h"
 #include "boot.h"
 #include "paths.h"
 #include "resource.h"
+#include "platform.h"
+
+#include <security/gpg.h>
+
+static const char *boot_hook_dir = PKG_SYSCONF_DIR "/boot.d";
+enum {
+	BOOT_HOOK_EXIT_OK	= 0,
+	BOOT_HOOK_EXIT_UPDATE	= 2,
+};
+
+static void __attribute__((format(__printf__, 4, 5))) update_status(
+		boot_status_fn fn, void *arg, int type, char *fmt, ...)
+{
+	struct status status;
+	va_list ap;
+
+	va_start(ap, fmt);
+	status.message = talloc_vasprintf(NULL, fmt, ap);
+	va_end(ap);
+
+	status.type = type;
+	status.backlog = false;
+
+	pb_debug("boot status: [%d] %s\n", type, status.message);
+
+	fn(arg, &status);
+
+	talloc_free(status.message);
+}
 
 /**
  * kexec_load - kexec load helper.
- * @l_image: The local image file for kexec to execute.
- * @l_initrd: Optional local initrd file for kexec --initrd, can be NULL.
- * @l_dtb: Optional local dtb file for kexec --dtb, can be NULL.
- * @args: Optional command line args for kexec --append, can be NULL.
  */
-
-static int kexec_load(const char *l_image, const char *l_initrd,
-	const char *l_dtb, const char *args, int dry_run)
+static int kexec_load(struct boot_task *boot_task)
 {
-	int result;
-	const char *argv[7];
-	const char **p;
+	struct process *process;
 	char *s_initrd = NULL;
-	char *s_dtb = NULL;
 	char *s_args = NULL;
+	const char *argv[7];
+	char *s_dtb = NULL;
+	const char **p;
+	int result;
+
+
+	boot_task->local_initrd_override = NULL;
+	boot_task->local_dtb_override = NULL;
+	boot_task->local_image_override = NULL;
+
+	if ((result = gpg_validate_boot_files(boot_task))) {
+		if (result == KEXEC_LOAD_DECRYPTION_FALURE) {
+			pb_log("%s: Aborting kexec due to"
+				" decryption failure\n", __func__);
+			goto abort_kexec;
+		}
+		if (result == KEXEC_LOAD_SIGNATURE_FAILURE) {
+			pb_log("%s: Aborting kexec due to signature"
+				" verification failure\n", __func__);
+			goto abort_kexec;
+		}
+	}
+
+	const char* local_initrd = (boot_task->local_initrd_override) ?
+		boot_task->local_initrd_override : boot_task->local_initrd;
+	const char* local_dtb = (boot_task->local_dtb_override) ?
+		boot_task->local_dtb_override : boot_task->local_dtb;
+	const char* local_image = (boot_task->local_image_override) ?
+		boot_task->local_image_override : boot_task->local_image;
+
+	process = process_create(boot_task);
+	if (!process) {
+		pb_log("%s: failed to create process\n", __func__);
+		return -1;
+	}
+
+	process->path = pb_system_apps.kexec;
+	process->argv = argv;
+	process->keep_stdout = true;
+	process->add_stderr = true;
 
 	p = argv;
 	*p++ = pb_system_apps.kexec;	/* 1 */
 	*p++ = "-l";			/* 2 */
 
-	if (l_initrd) {
-		s_initrd = talloc_asprintf(NULL, "--initrd=%s", l_initrd);
+	if (local_initrd) {
+		s_initrd = talloc_asprintf(boot_task, "--initrd=%s",
+				local_initrd);
 		assert(s_initrd);
 		*p++ = s_initrd;	 /* 3 */
 	}
 
-	if (l_dtb) {
-		s_dtb = talloc_asprintf(NULL, "--dtb=%s", l_dtb);
+	if (local_dtb) {
+		s_dtb = talloc_asprintf(boot_task, "--dtb=%s",
+						local_dtb);
 		assert(s_dtb);
 		*p++ = s_dtb;		 /* 4 */
 	}
 
-	if (args) {
-		s_args = talloc_asprintf(NULL, "--append=%s", args);
-		assert(s_args);
-		*p++ = s_args;		/* 5 */
-	}
+	s_args = talloc_asprintf(boot_task, "--append=%s",
+				boot_task->args ?: "\"\"");
+	assert(s_args);
+	*p++ = s_args;		/* 5 */
 
-	*p++ = l_image;			/* 6*/
+	*p++ = local_image;		/* 6 */
 	*p++ = NULL;			/* 7 */
 
-	result = pb_run_cmd(argv, 1, dry_run);
+	result = process_run_sync(process);
+	if (result) {
+		pb_log("%s: failed to run process\n", __func__);
+		goto abort_kexec;
+	}
+
+	result = process->exit_status;
 
-	if (result)
+	if (result) {
 		pb_log("%s: failed: (%d)\n", __func__, result);
+		update_status(boot_task->status_fn, boot_task->status_arg,
+				STATUS_ERROR, "%s", process->stdout_buf);
+	}
 
-	talloc_free(s_initrd);
-	talloc_free(s_dtb);
-	talloc_free(s_args);
+abort_kexec:
+	gpg_validate_boot_files_cleanup(boot_task);
 
 	return result;
 }
@@ -73,31 +155,18 @@ static int kexec_load(const char *l_image, const char *l_initrd,
  * Must only be called after a successful call to kexec_load().
  */
 
-static int kexec_reboot(int dry_run)
+static int kexec_reboot(struct boot_task *task)
 {
-	int result = 0;
-	const char *argv[4];
-	const char **p;
+	int result;
 
 	/* First try running shutdown.  Init scripts should run 'exec -e' */
-
-	p = argv;
-	*p++ = pb_system_apps.shutdown;	/* 1 */
-	*p++ =  "-r";			/* 2 */
-	*p++ =  "now";			/* 3 */
-	*p++ =  NULL;			/* 4 */
-
-	result = pb_run_cmd(argv, 1, dry_run);
+	result = process_run_simple(task, pb_system_apps.shutdown, "-r",
+			"now", NULL);
 
 	/* On error, force a kexec with the -e option */
-
 	if (result) {
-		p = argv;
-		*p++ = pb_system_apps.kexec;	/* 1 */
-		*p++ = "-e";			/* 2 */
-		*p++ = NULL;			/* 3 */
-
-		result = pb_run_cmd(argv, 1, 0);
+		result = process_run_simple(task, pb_system_apps.kexec,
+						"-e", NULL);
 	}
 
 	if (result)
@@ -105,13 +174,8 @@ static int kexec_reboot(int dry_run)
 
 	/* okay, kexec -e -f */
 	if (result) {
-		p = argv;
-		*p++ = pb_system_apps.kexec;	/* 1 */
-		*p++ = "-e";			/* 2 */
-		*p++ = "-f";			/* 3 */
-		*p++ = NULL;			/* 4 */
-
-		result = pb_run_cmd(argv, 1, 0);
+		result = process_run_simple(task, pb_system_apps.kexec,
+						"-e", "-f", NULL);
 	}
 
 	if (result)
@@ -121,43 +185,345 @@ static int kexec_reboot(int dry_run)
 	return result;
 }
 
-static void update_status(boot_status_fn fn, void *arg, int type,
-		char *message)
+static void boot_hook_update_param(void *ctx, struct boot_task *task,
+		const char *name, const char *value)
+{
+	struct p {
+		const char *name;
+		const char **p;
+	} *param, params[] = {
+		{ "boot_image",		&task->local_image },
+		{ "boot_initrd",	&task->local_initrd },
+		{ "boot_dtb",		&task->local_dtb },
+		{ "boot_args",		&task->args },
+		{ NULL, NULL },
+	};
+
+	for (param = params; param->name; param++) {
+		if (strcmp(param->name, name))
+			continue;
+
+		*param->p = talloc_strdup(ctx, value);
+		return;
+	}
+}
+
+static void boot_hook_update(struct boot_task *task, const char *hookname,
+		char *buf)
 {
-	struct boot_status status;
+	char *line, *name, *val, *sep;
+	char *saveptr = NULL;
 
-	status.type = type;
-	status.message = message;
-	status.progress = -1;
-	status.detail = NULL;
+	for (;; buf = NULL) {
 
-	fn(arg, &status);
+		line = strtok_r(buf, "\n", &saveptr);
+		if (!line)
+			break;
+
+		sep = strchr(line, '=');
+		if (!sep)
+			continue;
+
+		*sep = '\0';
+		name = line;
+		val = sep + 1;
+
+		boot_hook_update_param(task, task, name, val);
+
+		pb_log("boot hook %s specified %s=%s\n",
+				hookname, name, val);
+	}
 }
 
-int boot(void *ctx, struct discover_boot_option *opt, struct boot_command *cmd,
-		int dry_run, boot_status_fn status_fn, void *status_arg)
+static void boot_hook_setenv(struct boot_task *task)
 {
-	char *local_image, *local_initrd, *local_dtb;
-	struct pb_url *image, *initrd, *dtb;
-	unsigned int clean_image = 0;
-	unsigned int clean_initrd = 0;
-	unsigned int clean_dtb = 0;
-	char *args;
-	int result;
+	unsetenv("boot_image");
+	unsetenv("boot_initrd");
+	unsetenv("boot_dtb");
+	unsetenv("boot_args");
+	unsetenv("boot_console");
+
+	setenv("boot_image", task->local_image, 1);
+	if (task->local_initrd)
+		setenv("boot_initrd", task->local_initrd, 1);
+	if (task->local_dtb)
+		setenv("boot_dtb", task->local_dtb, 1);
+	if (task->args)
+		setenv("boot_args", task->args, 1);
+	if (task->boot_console)
+		setenv("boot_console", task->boot_console, 1);
+}
+
+static int hook_filter(const struct dirent *dirent)
+{
+	return dirent->d_type == DT_REG || dirent->d_type == DT_LNK;
+}
+
+static int hook_cmp(const struct dirent **a, const struct dirent **b)
+{
+	return strcmp((*a)->d_name, (*b)->d_name);
+}
+
+static void run_boot_hooks(struct boot_task *task)
+{
+	struct dirent **hooks;
+	int i, n;
+
+	n = scandir(boot_hook_dir, &hooks, hook_filter, hook_cmp);
+	if (n < 1)
+		return;
+
+	update_status(task->status_fn, task->status_arg, STATUS_INFO,
+			_("Running boot hooks"));
+
+	boot_hook_setenv(task);
+
+	for (i = 0; i < n; i++) {
+		const char *argv[2] = { NULL, NULL };
+		struct process *process;
+		char *path;
+		int rc;
+
+		path = join_paths(task, boot_hook_dir, hooks[i]->d_name);
+
+		if (access(path, X_OK)) {
+			talloc_free(path);
+			continue;
+		}
+
+		process = process_create(task);
+
+		argv[0] = path;
+		process->path = path;
+		process->argv = argv;
+		process->keep_stdout = true;
+
+		pb_log("running boot hook %s\n", hooks[i]->d_name);
 
-	local_initrd = NULL;
-	image = NULL;
-	initrd = NULL;
-	dtb = NULL;
-	args = NULL;
+		rc = process_run_sync(process);
+		if (rc) {
+			pb_log("boot hook exec failed!\n");
+
+		} else if (WIFEXITED(process->exit_status) &&
+			   WEXITSTATUS(process->exit_status)
+				== BOOT_HOOK_EXIT_UPDATE) {
+			/* if the hook returned with BOOT_HOOK_EXIT_UPDATE,
+			 * then we process stdout to look for updated params
+			 */
+			boot_hook_update(task, hooks[i]->d_name,
+					process->stdout_buf);
+			boot_hook_setenv(task);
+		}
+
+		process_release(process);
+		talloc_free(path);
+	}
+
+	free(hooks);
+}
+
+static bool load_pending(struct load_url_result *result)
+{
+	return !result || result->status == LOAD_ASYNC;
+}
+
+static int check_load(struct boot_task *task, const char *name,
+		struct load_url_result *result)
+{
+	if (!result)
+		return 0;
+
+	if (result->status != LOAD_ERROR) {
+		update_status(task->status_fn, task->status_arg,
+				STATUS_ERROR,
+				_("Loaded %s from %s"), name,
+				pb_url_to_string(result->url));
+		return 0;
+	}
+
+	update_status(task->status_fn, task->status_arg,
+			STATUS_ERROR,
+			_("Couldn't load %s from %s"), name,
+			pb_url_to_string(result->url));
+	return -1;
+}
+
+static void cleanup_load(struct load_url_result *result)
+{
+	if (!result)
+		return;
+	if (result->status != LOAD_OK)
+		return;
+	if (!result->cleanup_local)
+		return;
+	unlink(result->local);
+}
+
+static void cleanup_cancellations(struct boot_task *task,
+		struct load_url_result *cur_result)
+{
+	struct boot_resource *resource;
+	struct load_url_result *result;
+	bool pending = false;
+
+	list_for_each_entry(&task->resources, resource, list) {
+		result = resource->result;
+
+		/* Nothing to do if a load hasn't actually started yet */
+		if (!result)
+			continue;
+
+		/* We need to cleanup and free any completed loads */
+		if (result == cur_result || result->status == LOAD_OK
+				|| result->status == LOAD_ERROR) {
+			cleanup_load(result);
+		/* ... and cancel any pending loads, which we'll free in
+		 * the completion callback */
+		} else if (result->status == LOAD_ASYNC) {
+			load_url_async_cancel(result);
+			pending = true;
+
+		/* if we're waiting for a cancellation, we still need to
+		 * wait for the completion before freeing the boot task */
+		} else if (result->status == LOAD_CANCELLED) {
+			pending = true;
+		}
+	}
+
+	if (!pending)
+		talloc_free(task);
+}
+
+static void boot_process(struct load_url_result *result, void *data)
+{
+	struct boot_task *task = data;
+	struct boot_resource *resource;
+	int rc = -1;
+
+	if (task->cancelled) {
+		cleanup_cancellations(task, result);
+		return;
+	}
+
+	list_for_each_entry(&task->resources, resource, list)
+		if (load_pending(resource->result))
+			return;
+
+	list_for_each_entry(&task->resources, resource, list) {
+		if (check_load(task, resource->name, resource->result))
+			goto no_load;
+		*resource->local_path = resource->result->local;
+	}
+
+	run_boot_hooks(task);
+
+	update_status(task->status_fn, task->status_arg, STATUS_INFO,
+			_("Performing kexec load"));
+
+	rc = kexec_load(task);
+	pb_log("%s: kexec_load returned %d\n", __func__, rc);
+	if (rc == KEXEC_LOAD_DECRYPTION_FALURE) {
+		update_status(task->status_fn, task->status_arg,
+				STATUS_ERROR, _("Decryption failed"));
+	}
+	else if (rc == KEXEC_LOAD_SIGNATURE_FAILURE) {
+		update_status(task->status_fn, task->status_arg,
+				STATUS_ERROR,
+				_("Signature verification failed"));
+	}
+	else if (rc == KEXEC_LOAD_SIG_SETUP_INVALID) {
+		update_status(task->status_fn, task->status_arg,
+				STATUS_ERROR,
+				_("Invalid signature configuration"));
+	}
+
+no_load:
+	list_for_each_entry(&task->resources, resource, list)
+		cleanup_load(resource->result);
+
+	if (!rc) {
+		update_status(task->status_fn, task->status_arg,
+				STATUS_INFO, _("Performing kexec reboot"));
+
+		rc = kexec_reboot(task);
+		if (rc) {
+			update_status(task->status_fn, task->status_arg,
+					STATUS_ERROR,
+					_("kexec reboot failed"));
+		}
+	}
+}
+
+static int start_url_load(struct boot_task *task, struct boot_resource *res)
+{
+	if (!res)
+		return 0;
+
+	res->result = load_url_async(task, res->url, boot_process,
+				 task, NULL, task->status_arg);
+	if (!res->result) {
+		update_status(task->status_fn, task->status_arg,
+				STATUS_ERROR, _("Error loading %s"),
+				res->name);
+		return -1;
+	}
+	return 0;
+}
+
+static struct boot_resource *add_boot_resource(struct boot_task *task,
+		const char *name, struct pb_url *url,
+		const char **local_path)
+{
+	struct boot_resource *res;
+
+	if (!url)
+		return NULL;
+
+	res = talloc_zero(task, struct boot_resource);
+	if (!res)
+		return NULL;
+
+	res->name = talloc_strdup(res, name);
+	res->url = pb_url_copy(res, url);
+	res->local_path = local_path;
+
+	list_add(&task->resources, &res->list);
+	return res;
+}
+
+struct boot_task *boot(void *ctx, struct discover_boot_option *opt,
+		struct boot_command *cmd, int dry_run,
+		boot_status_fn status_fn, void *status_arg)
+{
+	struct pb_url *image = NULL, *initrd = NULL, *dtb = NULL;
+	struct pb_url *image_sig = NULL, *initrd_sig = NULL, *dtb_sig = NULL,
+		*cmdline_sig = NULL;
+	struct boot_resource *image_res, *initrd_res, *dtb_res, *tmp;
+	const struct config *config = config_get();
+	struct boot_task *boot_task;
+	const char *boot_desc;
+	int rc;
+	int lockdown_type;
+
+	if (opt && opt->option->name)
+		boot_desc = opt->option->name;
+	else if (cmd && cmd->boot_image_file)
+		boot_desc = cmd->boot_image_file;
+	else
+		boot_desc = _("(unknown)");
+
+	update_status(status_fn, status_arg, STATUS_INFO,
+			_("Booting %s"), boot_desc);
 
 	if (cmd && cmd->boot_image_file) {
 		image = pb_url_parse(opt, cmd->boot_image_file);
 	} else if (opt && opt->boot_image) {
 		image = opt->boot_image->url;
 	} else {
-		pb_log("%s: no image specified", __func__);
-		return -1;
+		pb_log("%s: no image specified\n", __func__);
+		update_status(status_fn, status_arg, STATUS_INFO,
+				_("Boot failed: no image specified"));
+		return NULL;
 	}
 
 	if (cmd && cmd->initrd_file) {
@@ -172,80 +538,114 @@ int boot(void *ctx, struct discover_boot_option *opt, struct boot_command *cmd,
 		dtb = opt->dtb->url;
 	}
 
-	if (cmd && cmd->boot_args) {
-		args = talloc_strdup(ctx, cmd->boot_args);
-	} else if (opt && opt->option->boot_args) {
-		args = talloc_strdup(ctx, opt->option->boot_args);
+	if (opt && opt->proxy) {
+		setenv("http_proxy", opt->proxy, 1);
+		setenv("https_proxy", opt->proxy, 1);
 	}
 
-	result = -1;
+	boot_task = talloc_zero(ctx, struct boot_task);
+	boot_task->dry_run = dry_run;
+	boot_task->status_fn = status_fn;
+	boot_task->status_arg = status_arg;
+	list_init(&boot_task->resources);
+
+	lockdown_type = lockdown_status();
+	boot_task->verify_signature = (lockdown_type == PB_LOCKDOWN_SIGN);
+	boot_task->decrypt_files = (lockdown_type == PB_LOCKDOWN_DECRYPT);
 
-	update_status(status_fn, status_arg, BOOT_STATUS_INFO,
-			"loading kernel");
-	local_image = load_url(NULL, image, &clean_image);
-	if (!local_image) {
-		update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
-				"Couldn't load kernel image");
-		goto no_load;
+	if (cmd && cmd->boot_args) {
+		boot_task->args = talloc_strdup(boot_task, cmd->boot_args);
+	} else if (opt && opt->option->boot_args) {
+		boot_task->args = talloc_strdup(boot_task,
+						opt->option->boot_args);
+	} else {
+		boot_task->args = NULL;
 	}
 
-	if (initrd) {
-		update_status(status_fn, status_arg, BOOT_STATUS_INFO,
-				"loading initrd");
-		local_initrd = load_url(NULL, initrd, &clean_initrd);
-		if (!local_initrd) {
-			update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
-					"Couldn't load initrd image");
-			goto no_load;
+	if (cmd && cmd->console && !config->manual_console)
+		boot_task->boot_console = talloc_strdup(boot_task, cmd->console);
+	else
+		boot_task->boot_console = config ? config->boot_console : NULL;
+
+	if (boot_task->verify_signature || boot_task->decrypt_files) {
+		if (cmd && cmd->args_sig_file) {
+			cmdline_sig = pb_url_parse(opt, cmd->args_sig_file);
+		} else if (opt && opt->args_sig_file) {
+			cmdline_sig = opt->args_sig_file->url;
+		} else {
+			pb_log("%s: no command line signature file"
+				" specified\n", __func__);
+			update_status(status_fn, status_arg, STATUS_INFO,
+					_("Boot failed: no command line"
+						" signature file specified"));
+			talloc_free(boot_task);
+			return NULL;
 		}
 	}
 
-	local_dtb = NULL;
-	if (dtb) {
-		update_status(status_fn, status_arg, BOOT_STATUS_INFO,
-				"loading device tree");
-		local_dtb = load_url(NULL, dtb, &clean_dtb);
-		if (!local_dtb) {
-			update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
-					"Couldn't load device tree");
-			goto no_load;
+	image_res = add_boot_resource(boot_task, _("kernel image"), image,
+			&boot_task->local_image);
+	initrd_res = add_boot_resource(boot_task, _("initrd"), initrd,
+			&boot_task->local_initrd);
+	dtb_res = add_boot_resource(boot_task, _("dtb"), dtb,
+			&boot_task->local_dtb);
+
+	/* start async loads for boot resources */
+	rc = start_url_load(boot_task, image_res)
+	  || start_url_load(boot_task, initrd_res)
+	  || start_url_load(boot_task, dtb_res);
+
+	if (boot_task->verify_signature) {
+		/* Generate names of associated signature files and load */
+		if (image) {
+			image_sig = gpg_get_signature_url(ctx, image);
+			tmp = add_boot_resource(boot_task,
+					_("kernel image signature"), image_sig,
+					&boot_task->local_image_signature);
+			rc |= start_url_load(boot_task, tmp);
+		}
+		if (initrd) {
+			initrd_sig = gpg_get_signature_url(ctx, initrd);
+			tmp = add_boot_resource(boot_task,
+					_("initrd signature"), initrd_sig,
+					&boot_task->local_initrd_signature);
+			rc |= start_url_load(boot_task, tmp);
+		}
+		if (dtb) {
+			dtb_sig = gpg_get_signature_url(ctx, dtb);
+			tmp = add_boot_resource(boot_task,
+					_("dtb signature"), dtb_sig,
+					&boot_task->local_dtb_signature);
+			rc |= start_url_load(boot_task, tmp);
 		}
 	}
 
-	update_status(status_fn, status_arg, BOOT_STATUS_INFO,
-			"performing kexec_load");
-
-	result = kexec_load(local_image, local_initrd, local_dtb,
-				args, dry_run);
-
-	if (result) {
-		update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
-				"kexec load failed");
+	if (boot_task->verify_signature || boot_task->decrypt_files) {
+		tmp = add_boot_resource(boot_task,
+				_("kernel command line signature"), cmdline_sig,
+				&boot_task->local_cmdline_signature);
+		rc |= start_url_load(boot_task, tmp);
 	}
 
-no_load:
-	if (clean_image)
-		unlink(local_image);
-	if (clean_initrd)
-		unlink(local_initrd);
-	if (clean_dtb)
-		unlink(local_dtb);
-
-	talloc_free(local_image);
-	talloc_free(local_initrd);
-	talloc_free(local_dtb);
-
-	if (!result) {
-		update_status(status_fn, status_arg, BOOT_STATUS_INFO,
-				"performing kexec reboot");
-
-		result = kexec_reboot(dry_run);
-
-		if (result) {
-			update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
-					"kexec reboot failed");
-		}
+	/* If all URLs are local, we may be done. */
+	if (rc) {
+		/* Don't call boot_cancel() to preserve the status update */
+		boot_task->cancelled = true;
+		cleanup_cancellations(boot_task, NULL);
+		return NULL;
 	}
 
-	return result;
+	boot_process(NULL, boot_task);
+
+	return boot_task;
+}
+
+void boot_cancel(struct boot_task *task)
+{
+	task->cancelled = true;
+
+	update_status(task->status_fn, task->status_arg, STATUS_INFO,
+			_("Boot cancelled"));
+
+	cleanup_cancellations(task, NULL);
 }