-#define _GNU_SOURCE
+#if defined(HAVE_CONFIG_H)
+#include "config.h"
+#endif
#include <stdbool.h>
#include <stdlib.h>
#include <system/system.h>
#include <talloc/talloc.h>
#include <url/url.h>
+#include <util/util.h>
#include "device-handler.h"
#include "boot.h"
BOOT_HOOK_EXIT_UPDATE = 2,
};
-
struct boot_task {
- char *local_image;
- char *local_initrd;
- char *local_dtb;
- char *args;
-
+ struct load_url_result *image;
+ struct load_url_result *initrd;
+ struct load_url_result *dtb;
+ const char *local_image;
+ const char *local_initrd;
+ const char *local_dtb;
+ const char *args;
+ boot_status_fn status_fn;
+ void *status_arg;
bool dry_run;
+ bool cancelled;
};
/**
return result;
}
-static void update_status(boot_status_fn fn, void *arg, int type,
- char *message)
+static void __attribute__((format(__printf__, 4, 5))) update_status(
+ boot_status_fn fn, void *arg, int type, char *fmt, ...)
{
struct boot_status status;
+ va_list ap;
+
+ va_start(ap, fmt);
+ status.message = talloc_vasprintf(NULL, fmt, ap);
+ va_end(ap);
status.type = type;
- status.message = message;
status.progress = -1;
status.detail = NULL;
+ pb_debug("boot status: [%d] %s\n", type, status.message);
+
fn(arg, &status);
+
+ talloc_free(status.message);
}
static void boot_hook_update_param(void *ctx, struct boot_task *task,
{
struct p {
const char *name;
- char **p;
+ const char **p;
} *param, params[] = {
{ "boot_image", &task->local_image },
{ "boot_initrd", &task->local_initrd },
return strcmp((*a)->d_name, (*b)->d_name);
}
-static void run_boot_hooks(struct boot_task *task, boot_status_fn status_fn,
- void *status_arg)
+static void run_boot_hooks(struct boot_task *task)
{
struct dirent **hooks;
int i, n;
if (n < 1)
return;
- update_status(status_fn, status_arg, BOOT_STATUS_INFO,
+ update_status(task->status_fn, task->status_arg, BOOT_STATUS_INFO,
"running boot hooks");
boot_hook_setenv(task);
/* 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(task, hooks[i]->d_name,
- process->stdout_buf);
- boot_hook_setenv(task);
- }
+ boot_hook_update(task, hooks[i]->d_name,
+ process->stdout_buf);
+ boot_hook_setenv(task);
}
process_release(process);
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)
+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)
+ return 0;
+
+ update_status(task->status_fn, task->status_arg,
+ BOOT_STATUS_ERROR,
+ "Couldn't load %s", name);
+ 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 load_url_result *result, **results[] = {
+ &task->image, &task->initrd, &task->dtb,
+ };
+ bool pending = false;
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(results); i++) {
+ result = *results[i];
+
+ 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);
+ talloc_free(result);
+ *results[i] = NULL;
+
+ /* ... 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 (!pending)
+ talloc_free(task);
+}
+
+static void boot_process(struct load_url_result *result, void *data)
+{
+ struct boot_task *task = data;
+ int rc = -1;
+
+ if (task->cancelled) {
+ cleanup_cancellations(task, result);
+ return;
+ }
+
+ if (load_pending(task->image) ||
+ load_pending(task->initrd) ||
+ load_pending(task->dtb))
+ return;
+
+ if (check_load(task, "kernel image", task->image) ||
+ check_load(task, "initrd", task->initrd) ||
+ check_load(task, "dtb", task->dtb))
+ goto no_load;
+
+ /* we make a copy of the local paths, as the boot hooks might update
+ * and/or create these */
+ task->local_image = task->image ? task->image->local : NULL;
+ task->local_initrd = task->initrd ? task->initrd->local : NULL;
+ task->local_dtb = task->dtb ? task->dtb->local : NULL;
+
+ run_boot_hooks(task);
+
+ update_status(task->status_fn, task->status_arg, BOOT_STATUS_INFO,
+ "performing kexec_load");
+
+ rc = kexec_load(task);
+ if (rc) {
+ update_status(task->status_fn, task->status_arg,
+ BOOT_STATUS_ERROR, "kexec load failed");
+ }
+
+no_load:
+ cleanup_load(task->image);
+ cleanup_load(task->initrd);
+ cleanup_load(task->dtb);
+
+ if (!rc) {
+ update_status(task->status_fn, task->status_arg,
+ BOOT_STATUS_INFO,
+ "performing kexec reboot");
+
+ rc = kexec_reboot(task);
+ if (rc) {
+ update_status(task->status_fn, task->status_arg,
+ BOOT_STATUS_ERROR,
+ "kexec reboot failed");
+ }
+ }
+}
+
+static int start_url_load(struct boot_task *task, const char *name,
+ struct pb_url *url, struct load_url_result **result)
+{
+ if (!url)
+ return 0;
+
+ *result = load_url_async(task, url, boot_process, task);
+ if (!*result) {
+ update_status(task->status_fn, task->status_arg,
+ BOOT_STATUS_ERROR,
+ "Error loading %s", name);
+ return -1;
+ }
+ return 0;
+}
+
+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 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;
+ const char *boot_desc;
+ int rc;
+
+ 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)";
- image = NULL;
- initrd = NULL;
- dtb = NULL;
+ update_status(status_fn, status_arg, BOOT_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, BOOT_STATUS_INFO,
+ "Boot failed: no image specified");
+ return NULL;
}
- boot_task = talloc_zero(ctx, struct boot_task);
- boot_task->dry_run = dry_run;
-
if (cmd && cmd->initrd_file) {
initrd = pb_url_parse(opt, cmd->initrd_file);
} else if (opt && opt->initrd) {
dtb = opt->dtb->url;
}
+ 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;
+
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 = NULL;
}
- result = -1;
-
- 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(boot_task, status_fn, status_arg);
-
- update_status(status_fn, status_arg, BOOT_STATUS_INFO,
- "performing kexec_load");
-
- result = kexec_load(boot_task);
+ /* start async loads for boot resources */
+ rc = start_url_load(boot_task, "kernel image", image, &boot_task->image)
+ || start_url_load(boot_task, "initrd", initrd, &boot_task->initrd)
+ || start_url_load(boot_task, "dtb", dtb, &boot_task->dtb);
- if (result) {
- update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
- "kexec load failed");
+ /* If all URLs are local, we may be done. */
+ if (rc) {
+ talloc_free(boot_task);
+ return NULL;
}
-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);
-
- if (!result) {
- update_status(status_fn, status_arg, BOOT_STATUS_INFO,
- "performing kexec reboot");
+ boot_process(NULL, boot_task);
- result = kexec_reboot(boot_task);
+ return boot_task;
+}
- if (result) {
- update_status(status_fn, status_arg, BOOT_STATUS_ERROR,
- "kexec reboot failed");
- }
- }
+void boot_cancel(struct boot_task *task)
+{
+ task->cancelled = true;
- talloc_free(boot_task);
+ update_status(task->status_fn, task->status_arg, BOOT_STATUS_INFO,
+ "Boot cancelled");
- return result;
+ cleanup_cancellations(task, NULL);
}
projects / petitboot / blobdiff