+ int result;
+ const char *argv[7];
+ const char **p;
+ char *s_initrd = NULL;
+ char *s_dtb = NULL;
+ char *s_args = NULL;
+
+ p = argv;
+ *p++ = pb_system_apps.kexec; /* 1 */
+ *p++ = "-l"; /* 2 */
+
+ if (boot_task->local_initrd) {
+ s_initrd = talloc_asprintf(NULL, "--initrd=%s",
+ boot_task->local_initrd);
+ assert(s_initrd);
+ *p++ = s_initrd; /* 3 */
+ }
+
+ if (boot_task->local_dtb) {
+ s_dtb = talloc_asprintf(NULL, "--dtb=%s", boot_task->local_dtb);
+ assert(s_dtb);
+ *p++ = s_dtb; /* 4 */
+ }
+
+ if (boot_task->args) {
+ s_args = talloc_asprintf(NULL, "--append=%s", boot_task->args);
+ assert(s_args);
+ *p++ = s_args; /* 5 */
+ }
+
+ *p++ = boot_task->local_image; /* 6 */
+ *p++ = NULL; /* 7 */
+
+ result = pb_run_cmd(argv, 1, boot_task->dry_run);
+
+ if (result)
+ pb_log("%s: failed: (%d)\n", __func__, result);
+
+ talloc_free(s_initrd);
+ talloc_free(s_dtb);
+ 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(bool 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 */
+
+ 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)
+{
+ struct boot_status status;
+
+ status.type = type;
+ status.message = message;
+ status.progress = -1;
+ status.detail = NULL;
+
+ fn(arg, &status);
+}
+
+static void boot_hook_update_param(void *ctx, struct boot_task *task,
+ const char *name, const char *value)
+{
+ struct p {
+ const char *name;
+ 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(void *ctx, const char *hookname,
+ struct boot_task *task, char *buf)
+{
+ char *line, *name, *val, *sep;
+ char *saveptr;
+
+ for (;; buf = NULL) {
+
+ 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(ctx, task, name, val);
+
+ pb_log("boot hook %s specified %s=%s\n",
+ hookname, name, val);
+ }
+}
+
+static void boot_hook_setenv(struct boot_task *task)
+{
+ unsetenv("boot_image");
+ unsetenv("boot_initrd");
+ unsetenv("boot_dtb");
+ unsetenv("boot_args");
+
+ 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);
+}
+
+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(void *ctx, struct boot_task *task,
+ boot_status_fn status_fn, void *status_arg)
+{
+ struct dirent **hooks;
+ int i, n;
+
+ n = scandir(boot_hook_dir, &hooks, hook_filter, hook_cmp);
+ if (n < 1)
+ return;
+
+ update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ "running boot hooks");
+
+ boot_hook_setenv(task);
+
+ for (i = 0; i < n; i++) {
+ const char *argv[2] = { NULL, NULL };
+ char *path, *buf;
+ int buf_len, rc;
+
+ path = join_paths(ctx, boot_hook_dir, hooks[i]->d_name);
+
+ if (access(path, X_OK))
+ continue;
+
+ pb_log("running boot hook %s\n", hooks[i]->d_name);
+
+ argv[0] = path;
+ rc = pb_run_cmd_pipe(argv, 1, task->dry_run, ctx,
+ &buf, &buf_len);
+
+ /* if the hook returned with BOOT_HOOK_EXIT_UPDATE,
+ * then we process stdout to look for updated params
+ */
+ if (rc == BOOT_HOOK_EXIT_UPDATE) {
+ boot_hook_update(ctx, hooks[i]->d_name, task, buf);
+ boot_hook_setenv(task);
+ }
+
+ talloc_free(buf);
+ talloc_free(path);
+ }
+
+ free(hooks);
+}
+
+int boot(void *ctx, struct discover_boot_option *opt, struct boot_command *cmd,
+ int dry_run, boot_status_fn status_fn, void *status_arg)
+{
+ struct boot_task boot_task;
+ struct pb_url *image, *initrd, *dtb;
+ unsigned int clean_image = 0;
+ unsigned int clean_initrd = 0;
+ unsigned int clean_dtb = 0;
+ int result;
+
+ image = NULL;
+ initrd = NULL;
+ dtb = NULL;
+ boot_task.dry_run = dry_run;
+
+ 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;
+ }
+
+ if (cmd && cmd->initrd_file) {
+ initrd = pb_url_parse(opt, cmd->initrd_file);
+ } else if (opt && opt->initrd) {
+ initrd = opt->initrd->url;
+ }
+
+ if (cmd && cmd->dtb_file) {
+ dtb = pb_url_parse(opt, cmd->dtb_file);
+ } else if (opt && opt->dtb) {
+ dtb = opt->dtb->url;
+ }
+
+ if (cmd && cmd->boot_args) {
+ boot_task.args = talloc_strdup(ctx, cmd->boot_args);
+ } else if (opt && opt->option->boot_args) {
+ boot_task.args = talloc_strdup(ctx, opt->option->boot_args);
+ } else {
+ boot_task.args = NULL;
+ }
+
+ result = -1;
+
+ boot_task.local_initrd = NULL;
+ boot_task.local_dtb = NULL;
+
+ update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ "loading kernel");
+ boot_task.local_image = load_url(NULL, image, &clean_image);
+ if (!boot_task.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");
+ boot_task.local_initrd = load_url(NULL, initrd, &clean_initrd);
+ if (!boot_task.local_initrd) {
+ update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
+ "Couldn't load initrd image");
+ goto no_load;
+ }
+ }
+
+ if (dtb) {
+ update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ "loading device tree");
+ boot_task.local_dtb = load_url(NULL, dtb, &clean_dtb);
+ if (!boot_task.local_dtb) {
+ update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
+ "Couldn't load device tree");
+ goto no_load;
+ }
+ }
+
+ run_boot_hooks(ctx, &boot_task, status_fn, status_arg);
+
+ update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ "performing kexec_load");
+
+ result = kexec_load(&boot_task);
+
+ if (result) {
+ update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
+ "kexec load failed");
+ }
+
+no_load:
+ if (clean_image)
+ unlink(boot_task.local_image);
+ if (clean_initrd)
+ unlink(boot_task.local_initrd);
+ if (clean_dtb)
+ unlink(boot_task.local_dtb);
+
+ talloc_free(boot_task.local_image);
+ talloc_free(boot_task.local_initrd);
+ talloc_free(boot_task.local_dtb);
+
+ if (!result) {
+ update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ "performing kexec reboot");
+
+ result = kexec_reboot(boot_task.dry_run);
+
+ if (result) {
+ update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
+ "kexec reboot failed");
+ }
+ }
projects / petitboot / blobdiff