#include "event.h"
#include "parser.h"
#include "resource.h"
-#include "udev.h"
#include "paths.h"
#include "boot.h"
struct list unresolved_boot_options;
};
+static int mount_device(struct discover_device *dev);
+static int umount_device(struct discover_device *dev);
+
void discover_context_add_boot_option(struct discover_context *ctx,
struct discover_boot_option *boot_option)
{
return opt;
}
-static int device_match_path(struct discover_device *dev, const char *path)
-{
- return dev->device_path && !strcmp(dev->device_path, path);
-}
-
static int device_match_uuid(struct discover_device *dev, const char *uuid)
{
return dev->uuid && !strcmp(dev->uuid, uuid);
struct discover_device *device_lookup_by_name(struct device_handler *handler,
const char *name)
{
- struct discover_device *dev;
- char *path;
-
- if (strncmp(name, "/dev/", strlen("/dev/")))
- path = talloc_asprintf(NULL, "/dev/%s", name);
- else
- path = talloc_strdup(NULL, name);
+ if (!strncmp(name, "/dev/", strlen("/dev/")))
+ name += strlen("/dev/");
- dev = device_lookup_by_path(handler, path);
-
- talloc_free(path);
-
- return dev;
-}
-
-struct discover_device *device_lookup_by_path(
- struct device_handler *device_handler,
- const char *path)
-{
- return device_lookup(device_handler, device_match_path, path);
+ return device_lookup_by_id(handler, name);
}
struct discover_device *device_lookup_by_uuid(
talloc_free(handler);
}
-#ifdef PETITBOOT_TEST
-
-/* we have a simplified interface for petitboot testing, but still want
- * to keep struct device_handler opaque. */
-struct device_handler *device_handler_init(
- struct discover_server *server __attribute__((unused)),
- struct waitset *waitset __attribute__((unused)),
- int dry_run __attribute__((unused)))
+static int destroy_device(void *arg)
{
- struct device_handler *handler;
+ struct discover_device *dev = arg;
- handler = talloc_zero(NULL, struct device_handler);
- list_init(&handler->unresolved_boot_options);
+ umount_device(dev);
- return handler;
+ return 0;
}
-void device_handler_add_device(struct device_handler *handler,
- struct discover_device *dev)
+struct discover_device *discover_device_create(struct device_handler *handler,
+ const char *id)
{
- handler->n_devices++;
- handler->devices = talloc_realloc(handler, handler->devices,
- struct discover_device *, handler->n_devices);
- handler->devices[handler->n_devices - 1] = dev;
-}
-
-#else
+ struct discover_device *dev;
-static int mount_device(struct discover_device *dev)
-{
- int rc;
+ dev = device_lookup_by_id(handler, id);
+ if (dev)
+ return dev;
- if (!dev->device_path)
- return -1;
+ dev = talloc_zero(handler, struct discover_device);
+ dev->device = talloc_zero(dev, struct device);
+ dev->device->id = talloc_strdup(dev->device, id);
+ list_init(&dev->params);
+ list_init(&dev->boot_options);
- if (!dev->mount_path)
- dev->mount_path = join_paths(dev, mount_base(),
- dev->device_path);
+ talloc_set_destructor(dev, destroy_device);
- if (pb_mkdir_recursive(dev->mount_path))
- pb_log("couldn't create mount directory %s: %s\n",
- dev->mount_path, strerror(errno));
+ return dev;
+}
- rc = process_run_simple(dev, pb_system_apps.mount,
- dev->device_path, dev->mount_path,
- "-o", "ro", NULL);
+struct discover_device_param {
+ char *name;
+ char *value;
+ struct list_item list;
+};
- if (!rc)
- return 0;
+void discover_device_set_param(struct discover_device *device,
+ const char *name, const char *value)
+{
+ struct discover_device_param *param;
+ bool found = false;
- /* Retry mount without ro option. */
- rc = process_run_simple(dev, pb_system_apps.mount,
- dev->device_path, dev->mount_path, NULL);
+ list_for_each_entry(&device->params, param, list) {
+ if (!strcmp(param->name, name)) {
+ found = true;
+ break;
+ }
+ }
- if (!rc)
- return 0;
+ if (!found) {
+ if (!value)
+ return;
+ param = talloc(device, struct discover_device_param);
+ param->name = talloc_strdup(param, name);
+ list_add(&device->params, ¶m->list);
+ } else {
+ if (!value) {
+ list_remove(¶m->list);
+ talloc_free(param);
+ return;
+ }
+ talloc_free(param->value);
+ }
- pb_rmdir_recursive(mount_base(), dev->mount_path);
- return -1;
+ param->value = talloc_strdup(param, value);
}
-static int umount_device(struct discover_device *dev)
+const char *discover_device_get_param(struct discover_device *device,
+ const char *name)
{
- int status;
-
- if (!dev->mount_path)
- return 0;
-
- status = process_run_simple(dev, pb_system_apps.umount,
- dev->mount_path, NULL);
-
- if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
- return -1;
-
- pb_rmdir_recursive(mount_base(), dev->mount_path);
+ struct discover_device_param *param;
- return 0;
+ list_for_each_entry(&device->params, param, list) {
+ if (!strcmp(param->name, name))
+ return param->name;
+ }
+ return NULL;
}
struct device_handler *device_handler_init(struct discover_server *server,
{
struct device_handler *handler;
- handler = talloc(NULL, struct device_handler);
- handler->devices = NULL;
- handler->n_devices = 0;
+ handler = talloc_zero(NULL, struct device_handler);
handler->server = server;
handler->waitset = waitset;
handler->dry_run = dry_run;
- handler->default_boot_option = NULL;
handler->autoboot_enabled = config_get()->autoboot_enabled;
+
list_init(&handler->unresolved_boot_options);
/* set up our mount point base */
return handler;
}
-static int destroy_device(void *arg)
-{
- struct discover_device *dev = arg;
-
- umount_device(dev);
-
- return 0;
-}
-
-static struct discover_device *find_device(struct device_handler *handler,
- const char *id)
-{
- struct discover_device *dev;
- unsigned int i;
-
- for (i = 0; i < handler->n_devices; i++) {
- dev = handler->devices[i];
- if (!strcmp(dev->device->id, id))
- return dev;
- }
-
- return NULL;
-}
-
-static struct discover_device *discover_device_create(
- struct device_handler *handler,
- struct discover_context *ctx,
- struct event *event)
-{
- struct discover_device *dev;
- const char *devname;
-
- dev = find_device(handler, event->device);
- if (dev)
- return dev;
-
- dev = talloc_zero(ctx, struct discover_device);
- dev->device = talloc_zero(dev, struct device);
- list_init(&dev->boot_options);
-
- devname = event_get_param(ctx->event, "DEVNAME");
- if (devname)
- dev->device_path = talloc_strdup(dev, devname);
-
- dev->device->id = talloc_strdup(dev, event->device);
-
- talloc_set_destructor(dev, destroy_device);
-
- return dev;
-}
-
-/**
- * device_handler_remove - Remove a device from the handler device array.
- */
-
-static void device_handler_remove(struct device_handler *handler,
- struct discover_device *device)
+void device_handler_remove(struct device_handler *handler,
+ struct discover_device *device)
{
unsigned int i;
break;
if (i == handler->n_devices) {
- assert(0 && "unknown device");
+ talloc_free(device);
return;
}
handler->devices = talloc_realloc(handler, handler->devices,
struct discover_device *, handler->n_devices);
- discover_server_notify_device_remove(handler->server, device->device);
+ if (device->notified)
+ discover_server_notify_device_remove(handler->server,
+ device->device);
talloc_free(device);
}
return 0;
}
+ handler->timeout_waiter = NULL;
+
pb_log("Timeout expired, booting default option %s\n", opt->option->id);
boot(handler, handler->default_boot_option, NULL,
return 0;
}
+static bool priority_match(struct boot_priority *prio,
+ struct discover_boot_option *opt)
+{
+ return prio->type == opt->device->device->type;
+}
+
+static int default_option_priority(struct discover_boot_option *opt)
+{
+ const struct config *config;
+ struct boot_priority *prio;
+ int i;
+
+ config = config_get();
+
+ for (i = 0; i < config->n_boot_priorities; i++) {
+ prio = &config->boot_priorities[i];
+ if (priority_match(prio, opt))
+ break;
+ }
+
+ return i;
+}
+
static void set_default(struct device_handler *handler,
struct discover_boot_option *opt)
{
- if (handler->default_boot_option)
+ if (!handler->autoboot_enabled)
return;
- if (!handler->autoboot_enabled)
+ /* Resolve any conflicts: if we have a new default option, it only
+ * replaces the current if it has a higher priority. */
+ if (handler->default_boot_option) {
+ int new_prio, cur_prio;
+
+ new_prio = default_option_priority(opt);
+ cur_prio = default_option_priority(
+ handler->default_boot_option);
+
+ if (new_prio < cur_prio) {
+ handler->default_boot_option = opt;
+ /* extend the timeout a little, so the user sees some
+ * indication of the change */
+ handler->sec_to_boot += 2;
+ }
+
return;
+ }
- handler->default_boot_option = opt;
handler->sec_to_boot = config_get()->autoboot_timeout_sec;
+ handler->default_boot_option = opt;
pb_log("Boot option %s set as default, timeout %u sec.\n",
opt->option->id, handler->sec_to_boot);
set_default(handler, opt);
}
+static void notify_boot_option(struct device_handler *handler,
+ struct discover_boot_option *opt)
+{
+ struct discover_device *dev = opt->device;
+
+ if (!dev->notified)
+ discover_server_notify_device_add(handler->server,
+ opt->device->device);
+ dev->notified = true;
+ discover_server_notify_boot_option_add(handler->server, opt->option);
+}
+
static void process_boot_option_queue(struct device_handler *handler)
{
struct discover_boot_option *opt, *tmp;
list_add_tail(&opt->device->boot_options, &opt->list);
talloc_steal(opt->device, opt);
boot_option_finalise(handler, opt);
- discover_server_notify_boot_option_add(handler->server,
- opt->option);
+ notify_boot_option(handler, opt);
}
}
+struct discover_context *device_handler_discover_context_create(
+ struct device_handler *handler,
+ struct discover_device *device)
+{
+ struct discover_context *ctx;
+
+ ctx = talloc(handler, struct discover_context);
+ ctx->device = device;
+ ctx->conf_url = NULL;
+ list_init(&ctx->boot_options);
+
+ return ctx;
+}
+
/**
* context_commit - Commit a temporary discovery context to the handler,
* and notify the clients about any new options / devices
*/
-static void context_commit(struct device_handler *handler,
+void device_handler_discover_context_commit(struct device_handler *handler,
struct discover_context *ctx)
{
struct discover_device *dev = ctx->device;
struct discover_boot_option *opt, *tmp;
- unsigned int i, existing_device = 0;
-
- /* do we already have this device? */
- for (i = 0; i < handler->n_devices; i++) {
- if (ctx->device == handler->devices[i]) {
- existing_device = 1;
- break;
- }
- }
-
- /* if not already present, add the device to the handler's array */
- if (!existing_device) {
- handler->n_devices++;
- handler->devices = talloc_realloc(handler, handler->devices,
- struct discover_device *, handler->n_devices);
- handler->devices[handler->n_devices - 1] = dev;
- talloc_steal(handler, dev);
-
- discover_server_notify_device_add(handler->server, dev->device);
-
- /* this new device might be able to resolve existing boot
- * options */
- pb_log("New device %s, processing queue\n", dev->device->id);
- process_boot_option_queue(handler);
- }
+ if (!device_lookup_by_id(handler, dev->device->id))
+ device_handler_add_device(handler, dev);
/* move boot options from the context to the device */
list_for_each_entry_safe(&ctx->boot_options, opt, tmp, list) {
list_add_tail(&dev->boot_options, &opt->list);
talloc_steal(dev, opt);
boot_option_finalise(handler, opt);
- discover_server_notify_boot_option_add(handler->server,
- opt->option);
+ notify_boot_option(handler, opt);
} else {
if (!opt->source->resolve_resource) {
pb_log("parser %s gave us an unresolved "
}
}
-static int handle_add_udev_event(struct device_handler *handler,
- struct event *event)
-{
- struct discover_context *ctx;
- struct discover_device *dev;
- const char *param;
- int rc;
-
- /* create our context */
- ctx = talloc(handler, struct discover_context);
- ctx->event = event;
- list_init(&ctx->boot_options);
-
- /* create our top-level device */
- dev = discover_device_create(handler, ctx, event);
-
- ctx->device = dev;
-
- /* try to parse UUID and labels */
- param = event_get_param(ctx->event, "ID_FS_UUID");
- if (param)
- dev->uuid = talloc_strdup(dev, param);
-
- param = event_get_param(ctx->event, "ID_FS_LABEL");
- if (param)
- dev->label = talloc_strdup(dev, param);
-
- rc = mount_device(dev);
- if (rc) {
- talloc_free(ctx);
- return 0;
- }
-
- /* run the parsers. This will populate the ctx's boot_option list. */
- iterate_parsers(ctx, CONF_METHOD_LOCAL_FILE);
-
- /* add discovered stuff to the handler */
- context_commit(handler, ctx);
-
- talloc_free(ctx);
-
- return 0;
-}
-
-static int handle_remove_udev_event(struct device_handler *handler,
- struct event *event)
+void device_handler_add_device(struct device_handler *handler,
+ struct discover_device *device)
{
- struct discover_device *dev;
-
- dev = find_device(handler, event->device);
- if (!dev)
- return 0;
-
- /* remove device from handler device array */
- device_handler_remove(handler, dev);
+ handler->n_devices++;
+ handler->devices = talloc_realloc(handler, handler->devices,
+ struct discover_device *, handler->n_devices);
+ handler->devices[handler->n_devices - 1] = device;
- return 0;
}
-static int handle_add_user_event(struct device_handler *handler,
- struct event *event)
+/* Start discovery on a hotplugged device. The device will be in our devices
+ * array, but has only just been initialised by the hotplug source.
+ */
+int device_handler_discover(struct device_handler *handler,
+ struct discover_device *dev, enum conf_method method)
{
struct discover_context *ctx;
- struct discover_device *dev;
- int rc;
-
- assert(event->device);
-
- ctx = talloc(handler, struct discover_context);
- ctx->event = event;
- list_init(&ctx->boot_options);
- dev = discover_device_create(handler, ctx, event);
- ctx->device = dev;
+ process_boot_option_queue(handler);
- rc = parse_user_event(ctx, event);
+ /* create our context */
+ ctx = device_handler_discover_context_create(handler, dev);
- if (!rc)
- context_commit(handler, ctx);
+ mount_device(dev);
- return rc;
-}
-
-static int handle_remove_user_event(struct device_handler *handler,
- struct event *event)
-{
- struct discover_device *dev = find_device(handler, event->device);
+ /* run the parsers. This will populate the ctx's boot_option list. */
+ iterate_parsers(ctx, method);
- if (!dev)
- return 0;
+ /* add discovered stuff to the handler */
+ device_handler_discover_context_commit(handler, ctx);
- /* remove device from handler device array */
- device_handler_remove(handler, dev);
+ talloc_free(ctx);
return 0;
}
-static enum conf_method parse_conf_method(const char *str)
-{
-
- if (!strcasecmp(str, "dhcp")) {
- return CONF_METHOD_DHCP;
- }
- return CONF_METHOD_UNKNOWN;
-}
-
-static int handle_conf_user_event(struct device_handler *handler,
- struct event *event)
+/* incoming conf event */
+int device_handler_conf(struct device_handler *handler,
+ struct discover_device *dev, struct pb_url *url,
+ enum conf_method method)
{
struct discover_context *ctx;
- struct discover_device *dev;
- enum conf_method method;
- const char *val;
-
- ctx = talloc(handler, struct discover_context);
- ctx->event = event;
- list_init(&ctx->boot_options);
-
- val = event_get_param(event, "url");
- if (!val) {
- talloc_free(ctx);
- return 0;
- }
-
- ctx->conf_url = pb_url_parse(ctx, val);
- if (!ctx->conf_url) {
- talloc_free(ctx);
- return 0;
- }
- val = event_get_param(event, "method");
- if (!val) {
- talloc_free(ctx);
- return 0;
- }
-
- method = parse_conf_method(val);
- if (method == CONF_METHOD_UNKNOWN) {
- talloc_free(ctx);
- return 0;
- }
-
- dev = discover_device_create(handler, ctx, event);
- ctx->device = dev;
+ /* create our context */
+ ctx = device_handler_discover_context_create(handler, dev);
+ ctx->conf_url = url;
iterate_parsers(ctx, method);
- context_commit(handler, ctx);
-
- return 0;
-}
-
-typedef int (*event_handler)(struct device_handler *, struct event *);
+ device_handler_discover_context_commit(handler, ctx);
-static event_handler handlers[EVENT_TYPE_MAX][EVENT_ACTION_MAX] = {
- [EVENT_TYPE_UDEV] = {
- [EVENT_ACTION_ADD] = handle_add_udev_event,
- [EVENT_ACTION_REMOVE] = handle_remove_udev_event,
- },
- [EVENT_TYPE_USER] = {
- [EVENT_ACTION_ADD] = handle_add_user_event,
- [EVENT_ACTION_REMOVE] = handle_remove_user_event,
- [EVENT_ACTION_CONF] = handle_conf_user_event,
- }
-};
-
-int device_handler_event(struct device_handler *handler,
- struct event *event)
-{
- if (event->type >= EVENT_TYPE_MAX ||
- event->action >= EVENT_ACTION_MAX ||
- !handlers[event->type][event->action]) {
- pb_log("%s unknown type/action: %d/%d\n", __func__,
- event->type, event->action);
- return 0;
- }
+ talloc_free(ctx);
- return handlers[event->type][event->action](handler, event);
+ return 0;
}
static struct discover_boot_option *find_boot_option_by_id(
discover_server_notify_boot_status(handler->server, &status);
}
+
+#ifndef PETITBOOT_TEST
+static int mount_device(struct discover_device *dev)
+{
+ int rc;
+
+ if (!dev->device_path)
+ return -1;
+
+ if (!dev->mount_path)
+ dev->mount_path = join_paths(dev, mount_base(),
+ dev->device_path);
+
+ if (pb_mkdir_recursive(dev->mount_path))
+ pb_log("couldn't create mount directory %s: %s\n",
+ dev->mount_path, strerror(errno));
+
+ rc = process_run_simple(dev, pb_system_apps.mount,
+ dev->device_path, dev->mount_path,
+ "-o", "ro", NULL);
+
+ if (!rc)
+ return 0;
+
+ /* Retry mount without ro option. */
+ rc = process_run_simple(dev, pb_system_apps.mount,
+ dev->device_path, dev->mount_path, NULL);
+
+ if (!rc)
+ return 0;
+
+ pb_rmdir_recursive(mount_base(), dev->mount_path);
+ return -1;
+}
+
+static int umount_device(struct discover_device *dev)
+{
+ int status;
+
+ if (!dev->mount_path)
+ return 0;
+
+ status = process_run_simple(dev, pb_system_apps.umount,
+ dev->mount_path, NULL);
+
+ if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
+ return -1;
+
+ pb_rmdir_recursive(mount_base(), dev->mount_path);
+
+ return 0;
+}
+#else
+
+static int umount_device(struct discover_device *dev __attribute__((unused)))
+{
+ return 0;
+}
+
+static int __attribute__((unused)) mount_device(
+ struct discover_device *dev __attribute__((unused)))
+{
+ return 0;
+}
+
#endif
+