X-Git-Url: http://git.ozlabs.org/?p=petitboot;a=blobdiff_plain;f=discover%2Fboot.c;h=29aefa916a8e149b973c69baccbb52b6a6bef799;hp=ddb9e7dc367539343e09cb28d321388c5fecb452;hb=ee329cc09cfbeefac95efeda31bb9ef839dd1382;hpb=b8122dc9340e2f208220f0c88b4d71f91b78774f

diff --git a/discover/boot.c b/discover/boot.c
index ddb9e7d..29aefa9 100644
--- a/discover/boot.c
+++ b/discover/boot.c
@@ -1,14 +1,218 @@
 
+#include <assert.h>
+
+#include <log/log.h>
+#include <pb-protocol/pb-protocol.h>
+#include <system/system.h>
+#include <talloc/talloc.h>
+#include <url/url.h>
+
+#include "device-handler.h"
 #include "boot.h"
+#include "paths.h"
+#include "resource.h"
+
+/**
+ * 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.
+ * @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 *args, int dry_run)
+{
+	int result;
+	const char *argv[6];
+	const char **p;
+	char *s_initrd = NULL;
+	char *s_args = NULL;
+
+	p = argv;
+	*p++ = pb_system_apps.kexec;	/* 1 */
+	*p++ = "-l";			/* 2 */
+
+	if (l_initrd) {
+		s_initrd = talloc_asprintf(NULL, "--initrd=%s", l_initrd);
+		assert(s_initrd);
+		*p++ = s_initrd;	 /* 3 */
+	}
+
+	if (args) {
+		s_args = talloc_asprintf(NULL, "--append=%s", args);
+		assert(s_args);
+		*p++ = s_args;		/* 4 */
+	}
+
+	*p++ = l_image;			/* 5 */
+	*p++ = NULL;			/* 6 */
+
+	result = pb_run_cmd(argv, 1, dry_run);
+
+	if (result)
+		pb_log("%s: failed: (%d)\n", __func__, result);
+
+	talloc_free(s_initrd);
+	talloc_free(s_args);
+
+	return result;
+}
+
+/**
+ * kexec_reboot - Helper to boot the new kernel.
+ *
+ * Must only be called after a successful call to kexec_load().
+ */
+
+static int kexec_reboot(int dry_run)
+{
+	int result = 0;
+	const char *argv[4];
+	const char **p;
+
+	/* 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);
+
+	/* 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);
+	}
+
+	if (result)
+		pb_log("%s: failed: (%d)\n", __func__, result);
+
+	/* okay, kexec -e -f */
+	if (result) {
+		p = argv;
+		*p++ = pb_system_apps.kexec;	/* 1 */
+		*p++ = "-e";			/* 2 */
+		*p++ = "-f";			/* 3 */
+		*p++ = NULL;			/* 4 */
 
-int boot(void *ctx, struct boot_option *opt, struct boot_command *cmd,
-		int dry_run)
+		result = pb_run_cmd(argv, 1, 0);
+	}
+
+	if (result)
+		pb_log("%s: failed: (%d)\n", __func__, result);
+
+
+	return result;
+}
+
+static void update_status(boot_status_fn fn, void *arg, int type,
+		char *message)
 {
-	/* todo: run kexec with options from opt & cmd */
-	(void)ctx;
-	(void)opt;
-	(void)cmd;
-	(void)dry_run;
+	struct boot_status status;
+
+	status.type = type;
+	status.message = message;
+	status.progress = -1;
+	status.detail = NULL;
+
+	fn(arg, &status);
+}
+
+int boot(void *ctx, struct discover_boot_option *opt, struct boot_command *cmd,
+		int dry_run, boot_status_fn status_fn, void *status_arg)
+{
+	char *local_image, *local_initrd;
+	unsigned int clean_image = 0;
+	unsigned int clean_initrd = 0;
+	struct pb_url *image, *initrd;
+	char *args;
+	int result;
+
+	local_initrd = NULL;
+	image = NULL;
+	initrd = NULL;
+	args = NULL;
+
+	if (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;
+	}
+
+	if (cmd->initrd_file) {
+		initrd = pb_url_parse(opt, cmd->initrd_file);
+	} else if (opt && opt->initrd) {
+		initrd = opt->initrd->url;
+	}
+
+	if (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);
+	}
+
+	result = -1;
+
+	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 (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;
+		}
+	}
+
+	update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+			"performing kexec_load");
+
+	result = kexec_load(local_image, local_initrd, args, dry_run);
+
+	if (result) {
+		update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
+				"kexec load failed");
+	}
+
+no_load:
+	if (clean_image)
+		unlink(local_image);
+	if (clean_initrd)
+		unlink(local_initrd);
+
+	talloc_free(local_image);
+	talloc_free(local_initrd);
+
+	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");
+		}
+	}
 
-	return 0;
+	return result;
 }