Re: [PATCH v10 03/10] eficonfig: add "Edit Boot Option" menu entry

[Heinrich Schuchardt <xypron.glpk@gmx.de>]

On 7/22/22 04:39, Masahisa Kojima wrote:
> This commit adds the menu entry to edit the existing
> BOOT#### variable contents.
> User selects the item from the boot option list, then
> user can edit the description, file path and optional_data.
>
> Note that automatically generated boot option entry by bootmenu
> to support the removable media device is filtered out and user
> can not edit the automatically generated entry.
>
> Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
> ---
> Changes in v10:
> - update eficonfig_edit_boot_option() argument
>
> Changes in v9:
> - add function comment
>
> Changes in v8:
> - fix menu header string
> - fix function and structure prefix to "eficonfig"
>
> Newly created in v7
>
>   cmd/eficonfig.c | 193 ++++++++++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 193 insertions(+)
>
> diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
> index a58c5a66ff..dc552e7ae1 100644
> --- a/cmd/eficonfig.c
> +++ b/cmd/eficonfig.c
> @@ -81,6 +81,17 @@ struct eficonfig_file_entry_data {
>   	u16 *file_name;
>   };
>
> +/**
> + * struct eficonfig_boot_selection_data - structure to be used to select the boot option entry
> + *
> + * @bootorder_index:	index in the BootOrder variable

I have defined multiple boot options. But the efidebug command does not
allow to edit them. I just get an error message

BootOrder is not defined!

When BootOrder is defined I can only edit the BootOptions defined by
boot order.

Editing boot options *must not* depend on variable BootOrder. The only
BootOptions that shall not be editable are the autogenerated ones media.

Best regards

Heinrich

> + * @selected:		pointer to store the selected index in the BootOrder variable
> + */
> +struct eficonfig_boot_selection_data {
> +	u16 bootorder_index;
> +	int *selected;
> +};
> +
>   /**
>    * eficonfig_print_msg() - print message
>    *
> @@ -1356,6 +1367,187 @@ out:
>   	return ret;
>   }
>
> +/**
> + * eficonfig_process_boot_selected() - handler to select boot option entry
> + *
> + * @data:	pointer to the data for each entry
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_process_boot_selected(void *data)
> +{
> +	struct eficonfig_boot_selection_data *info = data;
> +
> +	if (info)
> +		*info->selected = info->bootorder_index;
> +
> +	return EFI_SUCCESS;
> +}
> +
> +/**
> + * eficonfig_show_boot_selection() - construct boot option menu entry
> + *
> + * @bootorder:	pointer to the BootOrder variable
> + * @count:	the number of BootOrder
> + * @selected:	pointer to store the selected index of BootOrder variable
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_show_boot_selection(u16 *bootorder, efi_uintn_t count,
> +						  int *selected)
> +{
> +	u32 i;
> +	efi_status_t ret;
> +	efi_uintn_t size, actual_count = 1; /* include "Quit" entry */
> +	void *load_option;
> +	struct efi_load_option lo;
> +	u16 varname[] = u"Boot####";
> +	struct eficonfig_item *menu_item, *iter;
> +
> +	menu_item = calloc(count + 1, sizeof(struct eficonfig_item));
> +	if (!menu_item) {
> +		ret = EFI_OUT_OF_RESOURCES;
> +		goto out;
> +	}
> +
> +	iter = menu_item;
> +	for (i = 0; i < count; i++) {
> +		efi_create_indexed_name(varname, sizeof(varname),
> +					"Boot", bootorder[i]);
> +		load_option = efi_get_var(varname, &efi_global_variable_guid, &size);
> +		if (!load_option)
> +			continue;
> +
> +		ret = efi_deserialize_load_option(&lo, load_option, &size);
> +		if (ret != EFI_SUCCESS) {
> +			log_warning("Invalid load option for %ls\n", varname);
> +			free(load_option);
> +			continue;
> +		}
> +
> +		if (size >= sizeof(efi_guid_t) &&
> +		    !guidcmp(lo.optional_data, &efi_guid_bootmenu_auto_generated)) {
> +			/*
> +			 * auto generated entry has GUID in optional_data,
> +			 * skip auto generated entry because it will be generated
> +			 * again even if it is edited or deleted.
> +			 */
> +			free(load_option);
> +			continue;
> +		}
> +
> +		if (lo.attributes & LOAD_OPTION_ACTIVE) {
> +			char *buf, *p;
> +			struct eficonfig_boot_selection_data *info;
> +
> +			info = calloc(1, sizeof(struct eficonfig_boot_selection_data));
> +			if (!info) {
> +				free(load_option);
> +				ret = EFI_OUT_OF_RESOURCES;
> +				goto out;
> +			}
> +
> +			buf = calloc(1, utf16_utf8_strlen(lo.label) + 1);
> +			if (!buf) {
> +				free(load_option);
> +				free(info);
> +				ret = EFI_OUT_OF_RESOURCES;
> +				goto out;
> +			}
> +			p = buf;
> +			utf16_utf8_strcpy(&p, lo.label);
> +			info->bootorder_index = i;
> +			info->selected = selected;
> +			iter->title = buf;
> +			iter->func = eficonfig_process_boot_selected;
> +			iter->data = info;
> +			iter++;
> +			actual_count++;
> +		}
> +		free(load_option);
> +	}
> +
> +	/* add "Quit" entry */
> +	iter->title = strdup("Quit");
> +	iter->func = eficonfig_process_quit;
> +	iter->data = NULL;
> +
> +	ret = eficonfig_process_common(menu_item, actual_count, "  ** Select Boot Option **");
> +
> +out:
> +	iter = menu_item;
> +	for (i = 0; i < actual_count; i++, iter++) {
> +		free(iter->title);
> +		free(iter->data);
> +	}
> +
> +	free(menu_item);
> +
> +	return ret;
> +}
> +
> +/**
> + * eficonfig_process_edit_boot_option() - handler to edit boot option
> + *
> + * @data:	pointer to the data for each entry
> + * Return:	status code
> + */
> +static efi_status_t eficonfig_process_edit_boot_option(void *data)
> +{
> +	u16 *bootorder;
> +	efi_status_t ret;
> +	efi_uintn_t num, size;
> +	struct eficonfig_boot_option *bo = NULL;
> +
> +	bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
> +	if (!bootorder) {
> +		eficonfig_print_msg("BootOrder is not defined!");
> +		ret = EFI_NOT_FOUND;
> +		return ret;
> +	}
> +
> +	num = size / sizeof(u16);
> +	while (1) {
> +		int selected;
> +		void *load_option;
> +		u16 varname[] = u"Boot####";
> +
> +		ret = eficonfig_show_boot_selection(bootorder, num, &selected);
> +		if (ret != EFI_SUCCESS)
> +			break;
> +
> +		bo = calloc(1, sizeof(struct eficonfig_boot_option));
> +		if (!bo) {
> +			ret = EFI_OUT_OF_RESOURCES;
> +			goto out;
> +		}
> +
> +		bo->boot_index = selected;
> +		efi_create_indexed_name(varname, sizeof(varname),
> +					"Boot", bootorder[selected]);
> +		load_option = efi_get_var(varname, &efi_global_variable_guid, &size);
> +		if (!load_option) {
> +			free(bo);
> +			ret = EFI_NOT_FOUND;
> +			goto out;
> +		}
> +
> +		ret = eficonfig_edit_boot_option(varname, bo, load_option, size,
> +						 "  ** Edit Boot Option ** ");
> +
> +		free(load_option);
> +		free(bo);
> +		if (ret != EFI_SUCCESS && ret != EFI_ABORTED)
> +			break;
> +	}
> +
> +out:
> +	free(bootorder);
> +
> +	/* to stay the parent menu */
> +	ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> +
> +	return ret;
> +}
> +
>   /**
>    * eficonfig_init() - do required initialization for eficonfig command
>    *
> @@ -1385,6 +1577,7 @@ static efi_status_t eficonfig_init(void)
>
>   static const struct eficonfig_item maintenance_menu_items[] = {
>   	{"Add Boot Option", eficonfig_process_add_boot_option},
> +	{"Edit Boot Option", eficonfig_process_edit_boot_option},
>   	{"Quit", eficonfig_process_quit},
>   };
>