+
+/* Incoming dhcp event */
+int device_handler_dhcp(struct device_handler *handler,
+ struct discover_device *dev, struct event *event)
+{
+ struct discover_context *ctx;
+
+ /* create our context */
+ ctx = device_handler_discover_context_create(handler, dev);
+ ctx->event = event;
+
+ iterate_parsers(ctx);
+
+ device_handler_discover_context_commit(handler, ctx);
+
+ talloc_free(ctx);
+
+ return 0;
+}
+
+/* incoming conf event */
+int device_handler_conf(struct device_handler *handler,
+ struct discover_device *dev, struct pb_url *url)
+{
+ struct discover_context *ctx;
+
+ /* create our context */
+ ctx = device_handler_discover_context_create(handler, dev);
+ ctx->conf_url = url;
+
+ iterate_parsers(ctx);
+
+ device_handler_discover_context_commit(handler, ctx);
+
+ talloc_free(ctx);
+
+ return 0;
+}
+
+static struct discover_boot_option *find_boot_option_by_id(
+ struct device_handler *handler, const char *id)
+{
+ unsigned int i;
+
+ for (i = 0; i < handler->n_devices; i++) {
+ struct discover_device *dev = handler->devices[i];
+ struct discover_boot_option *opt;
+
+ list_for_each_entry(&dev->boot_options, opt, list)
+ if (!strcmp(opt->option->id, id))
+ return opt;
+ }
+
+ return NULL;
+}
+
+void device_handler_boot(struct device_handler *handler,
+ struct boot_command *cmd)
+{
+ struct discover_boot_option *opt = NULL;
+
+ if (cmd->option_id && strlen(cmd->option_id))
+ opt = find_boot_option_by_id(handler, cmd->option_id);
+
+ if (handler->pending_boot)
+ boot_cancel(handler->pending_boot);
+ handler->pending_boot = boot(handler, opt, cmd, handler->dry_run,
+ boot_status, handler);
+ handler->pending_boot_is_default = false;
+}
+
+void device_handler_cancel_default(struct device_handler *handler)
+{
+ struct boot_status status;
+
+ if (handler->timeout_waiter)
+ waiter_remove(handler->timeout_waiter);
+
+ handler->timeout_waiter = NULL;
+ handler->autoboot_enabled = false;
+
+ /* we only send status if we had a default boot option queued */
+ if (!handler->default_boot_option)
+ return;
+
+ pb_log("Cancelling default boot option\n");
+
+ if (handler->pending_boot && handler->pending_boot_is_default) {
+ boot_cancel(handler->pending_boot);
+ handler->pending_boot = NULL;
+ handler->pending_boot_is_default = false;
+ }
+
+ handler->default_boot_option = NULL;
+
+ status.type = BOOT_STATUS_INFO;
+ status.progress = -1;
+ status.detail = NULL;
+ status.message = "Default boot cancelled";
+
+ discover_server_notify_boot_status(handler->server, &status);
+}
+
+void device_handler_update_config(struct device_handler *handler,
+ struct config *config)
+{
+ config_set(config);
+ discover_server_notify_config(handler->server, config);
+ device_handler_reinit(handler);
+}
+
+#ifndef PETITBOOT_TEST
+
+static int device_handler_init_sources(struct device_handler *handler)
+{
+ /* init our device sources: udev, network and user events */
+ handler->udev = udev_init(handler, handler->waitset);
+ if (!handler->udev)
+ return -1;
+
+ handler->network = network_init(handler, handler->waitset,
+ handler->dry_run);
+ if (!handler->network)
+ return -1;
+
+ handler->user_event = user_event_init(handler, handler->waitset);
+ if (!handler->user_event)
+ return -1;
+
+ return 0;
+}
+
+static void device_handler_reinit_sources(struct device_handler *handler)
+{
+ udev_reinit(handler->udev);
+
+ network_shutdown(handler->network);
+ handler->network = network_init(handler, handler->waitset,
+ handler->dry_run);
+}
+
+static bool check_existing_mount(struct discover_device *dev)
+{
+ struct stat devstat, mntstat;
+ struct mntent *mnt;
+ FILE *fp;
+ int rc;
+
+ rc = stat(dev->device_path, &devstat);
+ if (rc) {
+ pb_debug("%s: stat failed: %s\n", __func__, strerror(errno));
+ return false;
+ }
+
+ if (!S_ISBLK(devstat.st_mode)) {
+ pb_debug("%s: %s isn't a block device?\n", __func__,
+ dev->device_path);
+ return false;
+ }
+
+ fp = fopen("/proc/self/mounts", "r");
+
+ for (;;) {
+ mnt = getmntent(fp);
+ if (!mnt)
+ break;
+
+ if (!mnt->mnt_fsname || mnt->mnt_fsname[0] != '/')
+ continue;
+
+ rc = stat(mnt->mnt_fsname, &mntstat);
+ if (rc)
+ continue;
+
+ if (!S_ISBLK(mntstat.st_mode))
+ continue;
+
+ if (mntstat.st_rdev == devstat.st_rdev) {
+ dev->mount_path = talloc_strdup(dev, mnt->mnt_dir);
+ dev->mounted_rw = !!hasmntopt(mnt, "rw");
+ dev->mounted = true;
+ dev->unmount = false;
+
+ pb_debug("%s: %s is already mounted (r%c) at %s\n",
+ __func__, dev->device_path,
+ dev->mounted_rw ? 'w' : 'o',
+ mnt->mnt_dir);
+ break;
+ }
+ }
+
+ fclose(fp);
+
+ return mnt != NULL;
+}
+
+static int mount_device(struct discover_device *dev)
+{
+ const char *fstype;
+ int rc;
+
+ if (!dev->device_path)
+ return -1;
+
+ if (dev->mounted)
+ return 0;
+
+ if (check_existing_mount(dev))
+ return 0;
+
+ fstype = discover_device_get_param(dev, "ID_FS_TYPE");
+ if (!fstype)
+ return 0;
+
+ 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));
+ goto err_free;
+ }
+
+ pb_log("mounting device %s read-only\n", dev->device_path);
+ errno = 0;
+ rc = mount(dev->device_path, dev->mount_path, fstype,
+ MS_RDONLY | MS_SILENT, "");
+ if (!rc) {
+ dev->mounted = true;
+ dev->mounted_rw = false;
+ dev->unmount = true;
+ return 0;
+ }
+
+ pb_log("couldn't mount device %s: mount failed: %s\n",
+ dev->device_path, strerror(errno));
+
+ pb_rmdir_recursive(mount_base(), dev->mount_path);
+err_free:
+ talloc_free(dev->mount_path);
+ dev->mount_path = NULL;
+ return -1;
+}
+
+static int umount_device(struct discover_device *dev)
+{
+ int rc;
+
+ if (!dev->mounted || !dev->unmount)
+ return 0;
+
+ pb_log("unmounting device %s\n", dev->device_path);
+ rc = umount(dev->mount_path);
+ if (rc)
+ return -1;
+
+ dev->mounted = false;
+
+ pb_rmdir_recursive(mount_base(), dev->mount_path);
+
+ talloc_free(dev->mount_path);
+ dev->mount_path = NULL;
+
+ return 0;
+}
+
+int device_request_write(struct discover_device *dev, bool *release)
+{
+ int rc;
+
+ *release = false;
+
+ if (!dev->mounted)
+ return -1;
+
+ if (dev->mounted_rw)
+ return 0;
+
+ pb_log("remounting device %s read-write\n", dev->device_path);
+ rc = mount(dev->device_path, dev->mount_path, "",
+ MS_REMOUNT | MS_SILENT, "");
+ if (rc)
+ return -1;
+
+ dev->mounted_rw = true;
+ *release = true;
+ return 0;
+}
+
+void device_release_write(struct discover_device *dev, bool release)
+{
+ if (!release)
+ return;
+
+ pb_log("remounting device %s read-only\n", dev->device_path);
+ mount(dev->device_path, dev->mount_path, "",
+ MS_REMOUNT | MS_RDONLY | MS_SILENT, "");
+ dev->mounted_rw = false;
+}
+
+#else
+
+static int device_handler_init_sources(
+ struct device_handler *handler __attribute__((unused)))
+{
+ return 0;
+}
+
+static void device_handler_reinit_sources(
+ struct device_handler *handler __attribute__((unused)))
+{
+}
+
+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;
+}
+
+int device_request_write(struct discover_device *dev __attribute__((unused)),
+ bool *release)
+{
+ *release = true;
+ return 0;
+}
+
+void device_release_write(struct discover_device *dev __attribute__((unused)),
+ bool release __attribute__((unused)))
+{
+}
+
+#endif
+