[PATCH v8 2/9] eficonfig: menu-driven addition of UEFI boot option
Takahiro Akashi
takahiro.akashi at linaro.org
Thu Jul 14 04:07:13 CEST 2022
Heinrich,
On Sun, Jul 10, 2022 at 11:03:43AM +0200, Heinrich Schuchardt wrote:
> On 6/19/22 06:56, Masahisa Kojima wrote:
> > This commit add the "eficonfig" command.
> > The "eficonfig" command implements the menu-driven UEFI boot option
> > maintenance feature. This commit implements the addition of
> > new boot option. User can select the block device volume having
> > efi_simple_file_system_protocol and select the file corresponding
> > to the Boot#### variable. User can also enter the description and
> > optional_data of the BOOT#### variable in utf8.
> >
> > This commit adds "include/efi_config.h", it contains the common
> > definition to be used from other menus such as UEFI Secure Boot
> > key management.
> >
> > Signed-off-by: Masahisa Kojima <masahisa.kojima at linaro.org>
> > ---
> > Changes in v8:
> > - command name is change from "efimenu" to "eficonfig"
> > - function and struct prefixes is changed to "eficonfig"
> > - fix menu header string
> >
> > Changes in v7:
> > - add "efimenu" command and uefi variable maintenance code
> > moved into cmd/efimenu.c
> > - create include/efimenu.h to define the common definition for
> > the other menu such as UEFI Secure Boot key management
> > - update boot option edit UI, user can select description, file,
> > and optional_data to edit in the same menu like following.
> >
> > ** Edit Boot Option **
> >
> > Description: debian
> > File: virtio 0:1/EFI\debian\grubaa64.efi
> > Optional Data: test
> > Save
> > Quit
> >
> > - remove exit parameter from efimenu_process_common()
> > - menu title type is changed from u16 to char
> > - efimenu_process_common() add menu title string
> > - reduce printf/puts function call for displaying the menu
> > - efi_console_get_u16_string() accept 0 length to allow
> > optional_data is empty
> > - efi_console_get_u16_string() the "size" parameter name is changes to "count"
> > - efimenu is now designed to maintain the UEFI variables, remove autoboot related code
> > - remove one empty line before "Quit" entry
> > - efimenu_init() processes only the first time
> >
> > Changes in v6:
> > - fix typos
> > - modify volume name to match U-Boot syntax
> > - compile in CONFIG_EFI_LOADER=n and CONFIG_CMD_BOOTEFI_BOOTMGR=n
> > - simplify u16_strncmp() usage
> > - support "a\b.efi" file path, use link list to handle filepath
> > - modify length check condition
> > - UEFI related menu items only appears with CONFIG_AUTOBOOT_MENU_SHOW=y
> >
> > Changes in v5:
> > - remove forward declarations
> > - add const qualifier for menu items
> > - fix the possible unaligned access for directory info access
> > - split into three commit 1)add boot option 2) delete boot option 3)change boot order
> > This commit is 1)add boot option.
> > - fix file name buffer allocation size, it should be EFI_BOOTMENU_FILE_PATH_MAX * sizeof(u16)
> > - fix wrong size checking for file selection
> >
> > Chanes in v4:
> > - UEFI boot option maintenance menu is integrated into bootmenu
> > - display the simplified volume name(e.g. usb0:1, nvme1:2) for the
> > volume selection
> > - instead of extending lib/efi_loader/efi_bootmgr.c, newly create
> > lib/efi_loader/efi_bootmenu_maintenance.c and implement boot
> > variable maintenance into it.
> >
> > Changes in RFC v3:
> > not included in v3 series
> >
> > Changes in RFC v2:
> > - enable utf8 user input for boot option name
> > - create lib/efi_loader/efi_console.c::efi_console_get_u16_string() for
> > utf8 user input handling
> > - use u16_strlcat instead of u16_strcat
> > - remove the EFI_CALLs, and newly create or expose the following
> > xxx_int() functions.
> > efi_locate_handle_buffer_int(), efi_open_volume_int(),
> > efi_file_open_int(), efi_file_close_int(), efi_file_read_int() and
> > efi_file_setpos_int().
> > Note that EFI_CALLs still exist for EFI_DEVICE_PATH_TO_TEXT_PROTOCOL
> > and EFI_SIMPLE_TEXT_INPUT/OUTPUT_PROTOCOL
> > - use efi_search_protocol() instead of calling locate_protocol() to get
> > the device_path_to_text_protocol interface.
> > - remove unnecessary puts(ANSI_CLEAR_LINE), this patch is still depends on
> > puts(ANSI_CLEAR_CONSOLE)
> > - skip SetVariable() if the bootorder is not changed
> >
> > cmd/Kconfig | 7 +
> > cmd/Makefile | 1 +
> > cmd/eficonfig.c | 1270 +++++++++++++++++++++++++++++++++
> > include/efi_config.h | 91 +++
> > include/efi_loader.h | 40 ++
> > lib/efi_loader/efi_boottime.c | 52 +-
> > lib/efi_loader/efi_console.c | 78 ++
> > lib/efi_loader/efi_disk.c | 11 +
> > lib/efi_loader/efi_file.c | 75 +-
> > 9 files changed, 1578 insertions(+), 47 deletions(-)
> > create mode 100644 cmd/eficonfig.c
> > create mode 100644 include/efi_config.h
> >
> > diff --git a/cmd/Kconfig b/cmd/Kconfig
> > index 09193b61b9..bb7f1d0463 100644
> > --- a/cmd/Kconfig
> > +++ b/cmd/Kconfig
> > @@ -1870,6 +1870,13 @@ config CMD_EFIDEBUG
> > particularly for managing boot parameters as well as examining
> > various EFI status for debugging.
> >
> > +config CMD_EFICONFIG
> > + bool "eficonfig - provide menu-driven uefi variables maintenance interface"
> > + depends on CMD_BOOTEFI_BOOTMGR
> > + help
> > + Enable the 'eficonfig' command which provides the menu-driven UEFI
> > + variable maintenance interface.
> > +
> > config CMD_EXCEPTION
> > bool "exception - raise exception"
> > depends on ARM || RISCV || SANDBOX || X86
> > diff --git a/cmd/Makefile b/cmd/Makefile
> > index 5e43a1e022..0afa687e94 100644
> > --- a/cmd/Makefile
> > +++ b/cmd/Makefile
> > @@ -63,6 +63,7 @@ obj-$(CONFIG_ENV_IS_IN_EEPROM) += eeprom.o
> > obj-$(CONFIG_CMD_EEPROM) += eeprom.o
> > obj-$(CONFIG_EFI) += efi.o
> > obj-$(CONFIG_CMD_EFIDEBUG) += efidebug.o
> > +obj-$(CONFIG_CMD_EFICONFIG) += eficonfig.o
> > obj-$(CONFIG_CMD_ELF) += elf.o
> > obj-$(CONFIG_CMD_EROFS) += erofs.o
> > obj-$(CONFIG_HUSH_PARSER) += exit.o
> > diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c
> > new file mode 100644
> > index 0000000000..20747db115
> > --- /dev/null
> > +++ b/cmd/eficonfig.c
> > @@ -0,0 +1,1270 @@
> > +// SPDX-License-Identifier: GPL-2.0+
> > +/*
> > + * Menu-driven UEFI Variable maintenance
> > + *
> > + * Copyright (c) 2022 Masahisa Kojima, Linaro Limited
> > + */
> > +
> > +#include <ansi.h>
> > +#include <common.h>
> > +#include <charset.h>
> > +#include <efi_loader.h>
> > +#include <efi_config.h>
> > +#include <efi_variable.h>
> > +#include <log.h>
> > +#include <malloc.h>
> > +#include <menu.h>
> > +#include <watchdog.h>
> > +#include <asm/unaligned.h>
> > +#include <linux/delay.h>
> > +
> > +static struct efi_simple_text_input_protocol *cin;
> > +static struct efi_simple_text_output_protocol *cout;
> > +
> > +#define EFICONFIG_DESCRIPTION_MAX 32
> > +#define EFICONFIG_OPTIONAL_DATA_MAX 64
> > +#define EFICONFIG_EDIT_BOOT_OPTION_MENU_ENTRY 5
> > +
> > +#define EFICONFIG_AUTO_GENERATED_ENTRY_GUID \
> > + EFI_GUID(0x38c1acc1, 0x9fc0, 0x41f0, \
> > + 0xb9, 0x01, 0xfa, 0x74, 0xd6, 0xd6, 0xe4, 0xde)
> > +const efi_guid_t efi_guid_bootmenu_auto_generated =
> > + EFICONFIG_AUTO_GENERATED_ENTRY_GUID;
> > +
> > +struct eficonfig_boot_selection_data {
> > + u16 bootorder_index;
> > + int *selected;
> > +};
> > +
> > +struct eficonfig_filepath_info {
> > + u16 *name;
> > + struct list_head list;
> > +};
> > +
> > +/**
> > + * struct eficonfig_boot_option - structure to be used for uefi boot option update
> > + *
> > + * @file_info: user selected file info
> > + * @boot_index: index of the uefi BootOrder variable
> > + * @description: pointer to the description string
> > + * @optional_data: pointer to the optional_data
> > + * @edit_completed: flag indicates edit complete
> > + */
> > +struct eficonfig_boot_option {
> > + struct eficonfig_select_file_info file_info;
> > + unsigned int boot_index;
> > + u16 *description;
> > + u16 *optional_data;
> > + bool edit_completed;
> > +};
> > +
> > +struct eficonfig_volume_entry_data {
> > + struct eficonfig_select_file_info *file_info;
> > + struct efi_simple_file_system_protocol *v;
> > + struct efi_device_path *dp;
> > +};
> > +
> > +struct eficonfig_file_entry_data {
> > + struct eficonfig_select_file_info *file_info;
> > + bool is_directory;
> > + u16 *file_name;
> > +};
> > +
> > +/**
> > + * eficonfig_print_msg() - print message
> > + *
> > + * display the message to the user, user proceeds the screen
> > + * with ENTER key press.
> > + *
> > + * @items: pointer to the structure of each menu entry
> > + * @count: the number of menu entry
> > + * @menu_header: pointer to the menu header string
> > + * Return: status code
> > + */
> > +void eficonfig_print_msg(char *msg)
>
> None of you patches adds this function to an include. So it should be
> static.
>
> > +{
> > + char c;
> > +
> > + puts(ANSI_CURSOR_HIDE);
> > + puts(ANSI_CLEAR_CONSOLE);
> > + printf(ANSI_CURSOR_POSITION, 3, 4);
> > + printf(msg);
> > +
> > + /* Flush input */
> > + while (tstc())
> > + getchar();
> > +
> > + printf("\n\n Press ENTER to continue");
>
> We want to minimize the size of the U-Boot binary.
>
> Isn't the following single function call good enough?
>
> printf(ANSI_CURSOR_HIDE ANSI_CLEAR_CONSOLE ANSI_CURSOR_POSITION msg
> "\n\n Press ENTER to continue", 3, 4);
>
> > + while (1) {
> > + while (!tstc()) {
> > + WATCHDOG_RESET();
>
> If there is no user to hit a key, why should be stop the watchdog reset?
>
> > + mdelay(10);
>
> There is no benefit of calling mdelay here.
>
> > + }
> > + c = getchar();
> > + if (c == '\r')
> > + break;
> > + }
> > +}
>
> We should replace the whole loop by:
>
> getchar();
>
> > +
>
>
> Please, provide Sphinx style function descriptions for all functions.
>
>
> > +static void eficonfig_print_entry(void *data)
> > +{
> > + struct eficonfig_entry *entry = data;
> > + int reverse = (entry->efi_menu->active == entry->num);
> > +
> > + /* TODO: support scroll or page for many entries */
> > +
> > + /*
> > + * Move cursor to line where the entry will be drawn (entry->count)
> > + * First 3 lines(menu header) + one empty line
> > + */
> > + printf(ANSI_CURSOR_POSITION " ", entry->num + 4, 1);
> > +
> > + if (reverse)
> > + puts(ANSI_COLOR_REVERSE);
> > +
> > + printf("%s", entry->title);
> > +
> > + if (reverse)
> > + puts(ANSI_COLOR_RESET);
> > +}
> > +
> > +static void eficonfig_display_statusline(struct menu *m)
> > +{
> > + struct eficonfig_entry *entry;
> > +
> > + if (menu_default_choice(m, (void *)&entry) < 0)
> > + return;
> > +
> > + printf(ANSI_CURSOR_POSITION
> > + "\n%s\n"
> > + ANSI_CURSOR_POSITION
> > + "\n"
> > + " Press UP/DOWN to move, ENTER to select, ESC/CTRL+C to quit",
> > + 0, 1, entry->efi_menu->menu_header, entry->efi_menu->count + 5, 1);
> > +}
> > +
> > +static char *eficonfig_choice_entry(void *data)
> > +{
> > + int i;
> > + int esc = 0;
> > + struct eficonfig_entry *iter;
> > + enum bootmenu_key key = KEY_NONE;
> > + struct efimenu *efi_menu = data;
> > +
> > + while (1) {
> > + bootmenu_loop((struct bootmenu_data *)efi_menu, &key, &esc);
> > +
> > + switch (key) {
> > + case KEY_UP:
> > + if (efi_menu->active > 0)
> > + --efi_menu->active;
> > + /* no menu key selected, regenerate menu */
> > + return NULL;
> > + case KEY_DOWN:
> > + if (efi_menu->active < efi_menu->count - 1)
> > + ++efi_menu->active;
> > + /* no menu key selected, regenerate menu */
> > + return NULL;
> > + case KEY_SELECT:
> > + iter = efi_menu->first;
> > + for (i = 0; i < efi_menu->active; ++i)
> > + iter = iter->next;
> > + return iter->key;
> > + case KEY_QUIT:
> > + /* Quit by choosing the last entry */
> > + iter = efi_menu->first;
> > + while (iter->next)
> > + iter = iter->next;
> > + return iter->key;
> > + default:
> > + break;
> > + }
> > + }
> > +
> > + /* never happens */
> > + debug("eficonfig: this should not happen");
>
> This comment and message is wrong.
> key = KEY_NONE is an expected value for key.
>
> > + return NULL;
> > +}
> > +
> > +static void eficonfig_destroy(struct efimenu *efi_menu)
> > +{
> > + struct eficonfig_entry *next;
> > + struct eficonfig_entry *iter = efi_menu->first;
> > +
> > + while (iter) {
> > + next = iter->next;
> > + free(iter);
> > + iter = next;
> > + }
> > + free(efi_menu->menu_header);
> > + free(efi_menu);
> > +}
> > +
> > +/**
> > + * eficonfig_process_quit() - callback function for "Quit" entry
> > + *
> > + * @data: pointer to the data
> > + * Return: status code
> > + */
> > +efi_status_t eficonfig_process_quit(void *data)
> > +{
> > + return EFI_ABORTED;
> > +}
> > +
> > +/**
> > + * eficonfig_process_common() - main handler for uefi menu
>
> %s/uefi/UEFI/
>
> > + *
> > + * Construct the structures required to show the menu, then handle
> > + * the user input intracting with u-boot menu functions.
> > + *
> > + * @items: pointer to the structure of each menu entry
> > + * @count: the number of menu entry
> > + * @menu_header: pointer to the menu header string
> > + * Return: status code
> > + */
> > +efi_status_t eficonfig_process_common(const struct eficonfig_item *items, int count,
> > + char *menu_header)
> > +{
> > + u32 i;
> > + efi_status_t ret;
> > + struct menu *menu;
> > + void *choice = NULL;
> > + struct eficonfig_entry *entry;
> > + struct efimenu *efi_menu;
> > + struct eficonfig_entry *iter = NULL;
> > +
> > + if (count > EFICONFIG_ENTRY_NUM_MAX)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + efi_menu = calloc(1, sizeof(struct efimenu));
> > + if (!efi_menu)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + efi_menu->delay = -1;
> > + efi_menu->active = 0;
> > + efi_menu->first = NULL;
> > +
> > + if (menu_header) {
> > + efi_menu->menu_header = strdup(menu_header);
> > + if (!efi_menu->menu_header) {
> > + free(efi_menu);
> > + return EFI_OUT_OF_RESOURCES;
> > + }
> > + }
> > +
> > + for (i = 0; i < count; i++) {
> > + entry = calloc(1, sizeof(struct eficonfig_entry));
> > + if (!entry) {
> > + ret = EFI_LOAD_ERROR;
> > + goto out;
> > + }
> > +
> > + entry->num = i;
> > + entry->title = items->title;
> > + sprintf(entry->key, "%d", i);
> > + entry->efi_menu = efi_menu;
> > + entry->func = items->func;
> > + entry->data = items->data;
> > + entry->next = NULL;
> > +
> > + if (!iter)
> > + efi_menu->first = entry;
> > + else
> > + iter->next = entry;
> > +
> > + iter = entry;
> > + items++;
> > + }
> > + efi_menu->count = count;
> > +
> > + menu = menu_create(NULL, 0, 1, eficonfig_display_statusline,
> > + eficonfig_print_entry, eficonfig_choice_entry,
> > + efi_menu);
> > + if (!menu) {
> > + ret = EFI_INVALID_PARAMETER;
> > + goto out;
> > + }
> > +
> > + for (entry = efi_menu->first; entry; entry = entry->next) {
> > + if (!menu_item_add(menu, entry->key, entry)) {
> > + ret = EFI_INVALID_PARAMETER;
> > + goto out;
> > + }
> > + }
> > +
> > + menu_default_set(menu, efi_menu->first->key);
> > +
> > + puts(ANSI_CURSOR_HIDE);
> > + puts(ANSI_CLEAR_CONSOLE);
> > + printf(ANSI_CURSOR_POSITION, 1, 1);
>
> Please, use a single function call.
>
> > +
> > + if (menu_get_choice(menu, &choice)) {
> > + entry = choice;
> > + if (entry->func)
> > + ret = entry->func(entry->data);
> > + }
> > +
> > +out:
> > + menu_destroy(menu);
> > + eficonfig_destroy(efi_menu);
> > +
> > + puts(ANSI_CLEAR_CONSOLE);
> > + printf(ANSI_CURSOR_POSITION, 1, 1);
> > + puts(ANSI_CURSOR_SHOW);
>
> ditto
>
> > +
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_volume_selected(void *data)
> > +{
> > + struct eficonfig_volume_entry_data *info = data;
> > +
> > + if (info) {
> > + info->file_info->current_volume = info->v;
> > + info->file_info->dp_volume = info->dp;
> > + }
> > +
> > + return EFI_SUCCESS;
> > +}
> > +
> > +static efi_status_t eficonfig_file_selected(void *data)
> > +{
> > + struct eficonfig_file_entry_data *info = data;
> > +
> > + if (!info)
> > + return EFI_INVALID_PARAMETER;
> > +
> > + if (u16_strcmp(info->file_name, u".") == 0 &&
> > + u16_strlen(info->file_name) == 1) {
> > + /* stay current path */
> > + } else if (u16_strcmp(info->file_name, u"..") == 0 &&
> > + u16_strlen(info->file_name) == 2) {
> > + struct eficonfig_filepath_info *iter;
> > + struct list_head *pos, *n;
> > + int is_last;
> > +
> > + memset(info->file_info->current_path, 0, EFICONFIG_FILE_PATH_BUF_SIZE);
> > + list_for_each_safe(pos, n, &info->file_info->filepath_list) {
> > + iter = list_entry(pos, struct eficonfig_filepath_info, list);
> > +
> > + is_last = list_is_last(&iter->list, &info->file_info->filepath_list);
> > + if (is_last) {
> > + list_del(&iter->list);
> > + free(iter->name);
> > + free(iter);
> > + break;
> > + }
> > + u16_strlcat(info->file_info->current_path, iter->name,
> > + EFICONFIG_FILE_PATH_MAX);
> > + u16_strlcat(info->file_info->current_path, u"\\",
> > + EFICONFIG_FILE_PATH_MAX);
> > + }
> > + } else {
> > + size_t new_len;
> > + struct eficonfig_filepath_info *filepath;
> > +
> > + new_len = u16_strlen(info->file_info->current_path) +
> > + u16_strlen(info->file_name);
> > + if (new_len >= EFICONFIG_FILE_PATH_MAX) {
> > + eficonfig_print_msg("File path is too long!");
> > + return EFI_INVALID_PARAMETER;
> > + }
> > + u16_strlcat(info->file_info->current_path, info->file_name,
> > + EFICONFIG_FILE_PATH_MAX);
> > +
> > + filepath = calloc(1, sizeof(struct eficonfig_filepath_info));
> > + if (!filepath)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + filepath->name = u16_strdup(info->file_name);
> > + if (!filepath->name) {
> > + free(filepath);
> > + return EFI_OUT_OF_RESOURCES;
> > + }
> > + list_add_tail(&filepath->list, &info->file_info->filepath_list);
> > +
> > + if (info->is_directory) {
> > + /*
> > + * Remainig buffer should have enough space to contain u"\\" and
> > + * at least one character for file name
> > + */
> > + if (new_len + 2 >= EFICONFIG_FILE_PATH_MAX) {
> > + eficonfig_print_msg("Directory path is too long!");
> > + return EFI_INVALID_PARAMETER;
> > + }
> > + u16_strlcat(info->file_info->current_path, u"\\",
> > + EFICONFIG_FILE_PATH_MAX);
> > + } else {
> > + info->file_info->file_selected = true;
> > + }
> > + }
> > + return EFI_SUCCESS;
> > +}
> > +
> > +static efi_status_t eficonfig_select_volume(struct eficonfig_select_file_info *file_info)
> > +{
> > + u32 i;
> > + efi_status_t ret;
> > + efi_uintn_t count;
> > + struct efi_handler *handler;
> > + struct efi_device_path *device_path;
> > + efi_handle_t *volume_handles = NULL;
> > + struct eficonfig_item *menu_item, *iter;
> > + struct efi_simple_file_system_protocol *v;
> > +
> > + ret = efi_locate_handle_buffer_int(BY_PROTOCOL, &efi_simple_file_system_protocol_guid,
> > + NULL, &count, (efi_handle_t **)&volume_handles);
> > + if (ret != EFI_SUCCESS) {
> > + eficonfig_print_msg("No block device found!");
> > + return ret;
> > + }
> > +
> > + menu_item = calloc(count + 1, sizeof(struct eficonfig_item));
> > + if (!menu_item) {
> > + efi_free_pool(volume_handles);
> > + return EFI_OUT_OF_RESOURCES;
> > + }
> > +
> > + iter = menu_item;
> > + for (i = 0; i < count; i++) {
> > + char *devname;
> > + struct efi_block_io *block_io;
> > + struct eficonfig_volume_entry_data *info;
> > +
> > + ret = efi_search_protocol(volume_handles[i],
> > + &efi_simple_file_system_protocol_guid, &handler);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > + ret = efi_protocol_open(handler, (void **)&v, efi_root, NULL,
> > + EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > +
> > + ret = efi_search_protocol(volume_handles[i], &efi_guid_device_path, &handler);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > + ret = efi_protocol_open(handler, (void **)&device_path,
> > + efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > +
> > + ret = efi_search_protocol(volume_handles[i], &efi_block_io_guid, &handler);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > + ret = efi_protocol_open(handler, (void **)&block_io,
> > + efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > +
> > + info = calloc(1, sizeof(struct eficonfig_volume_entry_data));
> > + if (!info) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto out;
> > + }
> > +
> > + devname = calloc(1, BOOTMENU_DEVICE_NAME_MAX);
> > + if (!devname) {
> > + free(info);
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto out;
> > + }
> > + efi_disk_get_device_name(block_io, devname, BOOTMENU_DEVICE_NAME_MAX);
> > +
> > + info->v = v;
> > + info->dp = device_path;
> > + info->file_info = file_info;
> > + iter->title = devname;
> > + iter->func = eficonfig_volume_selected;
> > + iter->data = info;
> > + iter++;
> > + }
> > +
> > + iter->title = strdup("Quit");
> > + iter->func = eficonfig_process_quit;
> > + iter->data = NULL;
> > + count += 1;
> > +
> > + ret = eficonfig_process_common(menu_item, count, " ** Select Volume **");
> > +
> > +out:
> > + iter = menu_item;
> > + for (i = 0; i < count; i++, iter++) {
> > + free(iter->data);
> > + free(iter->title);
> > + }
> > +
> > + free(menu_item);
> > +
> > + efi_free_pool(volume_handles);
> > +
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_select_file(struct eficonfig_select_file_info *file_info,
> > + struct efi_file_handle *root)
> > +{
> > + u32 i;
> > + u32 count = 0;
> > + efi_uintn_t len;
> > + efi_status_t ret;
> > + struct efi_file_handle *f;
> > + struct efi_file_info *buf;
> > + struct eficonfig_item *menu_item, *iter;
> > +
> > + buf = calloc(1, sizeof(struct efi_file_info) + EFICONFIG_FILE_PATH_BUF_SIZE);
> > + if (!buf)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + while (!file_info->file_selected) {
> > + count = 0;
> > +
> > + ret = efi_file_open_int(root, &f, file_info->current_path, EFI_FILE_MODE_READ, 0);
> > + if (ret != EFI_SUCCESS) {
> > + /* TODO: need to fileter out non-FAT partition? */
>
> %s/fileter/filter/
>
> > + eficonfig_print_msg("Reading volume failed! Please make sure the selected\n"
> > + " volume is FAT12/FAT16/FAT32 partition.");
>
> Who cares if the file is on FAT, ext4, or any other file system else if
> U-Boot can read it?
>
> > + ret = EFI_ABORTED;
> > + goto out;
> > + }
> > +
> > + /* calculate directory information total count */
>
> /* Count the number of directory entries */
>
> > + for (;;) {
> > + len = sizeof(struct efi_file_info) + EFICONFIG_FILE_PATH_BUF_SIZE;
> > + ret = efi_file_read_int(f, &len, buf);
> > + if (ret != EFI_SUCCESS || len == 0)
> > + break;
> > +
> > + count++;
> > + }
> > +
> > + menu_item = calloc(count + 1, sizeof(struct eficonfig_item));
> > + if (!menu_item) {
> > + efi_file_close_int(f);
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto out;
> > + }
> > +
> > + /* read directory and construct menu structure */
> > + efi_file_setpos_int(f, 0);
> > + iter = menu_item;
> > + for (i = 0; i < count; i++) {
> > + char *name, *p;
> > + int name_len;
> > + struct eficonfig_file_entry_data *info;
> > +
> > + len = sizeof(struct efi_file_info) + EFICONFIG_FILE_PATH_BUF_SIZE;
> > + ret = efi_file_read_int(f, &len, buf);
> > + if (ret != EFI_SUCCESS || len == 0)
> > + goto err;
> > +
> > + info = calloc(1, sizeof(struct eficonfig_file_entry_data));
> > + if (!info) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto err;
> > + }
> > +
> > + if (buf->attribute & EFI_FILE_DIRECTORY) {
>
> Should we filter out '.' and '..'?
>
> > + /* append u'/' at the end of directory name */
> > + name_len = utf16_utf8_strlen(buf->file_name) + 2;
> > + name = calloc(1, name_len);
> > + if (!name) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto err;
> > + }
> > + p = name;
> > + utf16_utf8_strcpy(&p, buf->file_name);
> > + name[u16_strlen(buf->file_name)] = u'/';
> > +
> > + info->is_directory = true;
> > + } else {
> > + name_len = utf16_utf8_strlen(buf->file_name) + 1;
> > + name = calloc(1, name_len);
> > + if (!name) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto err;
> > + }
> > + p = name;
> > + utf16_utf8_strcpy(&p, buf->file_name);
> > + }
> > +
> > + info->file_name = u16_strdup(buf->file_name);
> > + info->file_info = file_info;
> > + iter->title = name;
> > + iter->func = eficonfig_file_selected;
> > + iter->data = info;
> > + iter++;
> > + }
> > +
> > + /* add "Quit" entry */
> > + iter->title = "Quit";
> > + iter->func = eficonfig_process_quit;
> > + iter->data = NULL;
> > + count += 1;
>
> We want to reduce code size. Start the function with
>
> unsigned int count = 1;
>
> > +
> > + ret = eficonfig_process_common(menu_item, count, " ** Select File **");
> > +err:
> > + efi_file_close_int(f);
> > + iter = menu_item;
> > + for (i = 0; i < count - 1; i++, iter++) {
> > + free(((struct eficonfig_file_entry_data *)(iter->data))->file_name);
> > + free(iter->title);
> > + free(iter->data);
> > + }
> > +
> > + free(menu_item);
> > +
> > + if (ret != EFI_SUCCESS)
> > + break;
> > + }
> > +
> > +out:
> > + free(buf);
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_boot_add_enter_description(void *data)
> > +{
> > + u16 *tmp;
> > + efi_status_t ret;
> > + struct eficonfig_boot_option *bo = data;
> > +
> > + printf(ANSI_CLEAR_CONSOLE
> > + ANSI_CURSOR_POSITION
> > + "\n ** Edit Description **\n"
> > + "\n"
> > + " enter description: "
> > + ANSI_CURSOR_POSITION
> > + " Press ENTER to complete, ESC/CTRL+C to quit",
> > + 0, 1, 8, 1);
> > +
> > + tmp = calloc(1, EFICONFIG_DESCRIPTION_MAX * sizeof(u16));
> > + if (!tmp)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + ret = efi_console_get_u16_string(cin, cout, tmp,
> > + EFICONFIG_DESCRIPTION_MAX, NULL, 4, 22);
> > + if (ret == EFI_SUCCESS)
> > + u16_strcpy(bo->description, tmp);
> > +
> > + free(tmp);
> > +
> > + /* to stay the parent menu */
> > + ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> > +
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_boot_add_optional_data(void *data)
> > +{
> > + u16 *tmp;
> > + efi_status_t ret;
> > + struct eficonfig_boot_option *bo = data;
> > +
> > + printf(ANSI_CLEAR_CONSOLE
> > + ANSI_CURSOR_POSITION
> > + "\n ** Edit Optional Data **\n"
> > + "\n"
> > + " enter optional data:"
> > + ANSI_CURSOR_POSITION
> > + " Press ENTER to complete, ESC/CTRL+C to quit",
> > + 0, 1, 8, 1);
> > +
> > + tmp = calloc(1, EFICONFIG_OPTIONAL_DATA_MAX * sizeof(u16));
> > + ret = efi_console_get_u16_string(cin, cout, tmp,
> > + EFICONFIG_OPTIONAL_DATA_MAX, NULL, 4, 24);
> > +
> > + if (ret == EFI_SUCCESS)
> > + u16_strcpy(bo->optional_data, tmp);
> > +
> > + free(tmp);
> > +
> > + /* to stay the parent menu */
> > + ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> > +
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_boot_edit_save(void *data)
> > +{
> > + struct eficonfig_boot_option *bo = data;
> > +
> > + if (u16_strlen(bo->description) == 0) {
> > + eficonfig_print_msg("Boot Description is empty!");
> > + bo->edit_completed = false;
> > + return EFI_NOT_READY;
> > + }
> > + if (u16_strlen(bo->file_info.current_path) == 0) {
> > + eficonfig_print_msg("File is not selected!");
> > + bo->edit_completed = false;
> > + return EFI_NOT_READY;
> > + }
> > +
> > + bo->edit_completed = true;
> > +
> > + return EFI_SUCCESS;
> > +}
> > +
> > +static efi_status_t eficonfig_boot_edit_quit(void *data)
> > +{
> > + return EFI_ABORTED;
> > +}
> > +
> > +/**
> > + * eficonfig_select_file_handler() - handle user file selection
> > + *
> > + * @data: pointer to the data
> > + * Return: status code
> > + */
> > +efi_status_t eficonfig_select_file_handler(void *data)
> > +{
> > + size_t len;
> > + efi_status_t ret;
> > + struct list_head *pos, *n;
> > + struct efi_file_handle *root;
> > + struct eficonfig_filepath_info *item;
> > + struct eficonfig_select_file_info *file_info = data;
> > + struct eficonfig_select_file_info *tmp = NULL;
> > +
> > + tmp = calloc(1, sizeof(struct eficonfig_select_file_info));
> > + if (!tmp)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + tmp->current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> > + if (!tmp->current_path) {
> > + free(tmp);
> > + return EFI_OUT_OF_RESOURCES;
> > + }
> > + INIT_LIST_HEAD(&tmp->filepath_list);
> > +
> > + while (!tmp->file_selected) {
> > + tmp->current_volume = NULL;
> > + memset(tmp->current_path, 0, EFICONFIG_FILE_PATH_BUF_SIZE);
> > +
> > + ret = eficonfig_select_volume(tmp);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + if (!tmp->current_volume)
> > + return EFI_INVALID_PARAMETER;
> > +
> > + ret = efi_open_volume_int(tmp->current_volume, &root);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + ret = eficonfig_select_file(tmp, root);
> > + if (ret == EFI_ABORTED)
> > + continue;
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > + }
> > +
> > +out:
> > + if (ret == EFI_SUCCESS) {
> > + len = u16_strlen(tmp->current_path);
> > + len = (len >= EFICONFIG_FILE_PATH_MAX) ? (EFICONFIG_FILE_PATH_MAX - 1) : len;
> > + memcpy(file_info->current_path, tmp->current_path, len * sizeof(u16));
> > + file_info->current_path[len] = u'\0';
> > + file_info->current_volume = tmp->current_volume;
> > + file_info->dp_volume = tmp->dp_volume;
> > + }
> > +
> > + list_for_each_safe(pos, n, &tmp->filepath_list) {
> > + item = list_entry(pos, struct eficonfig_filepath_info, list);
> > + list_del(&item->list);
> > + free(item->name);
> > + free(item);
> > + }
> > + free(tmp->current_path);
> > + free(tmp);
> > +
> > + /* to stay the parent menu */
> > + ret = (ret == EFI_ABORTED) ? EFI_NOT_READY : ret;
> > +
> > + return ret;
> > +}
> > +
> > +efi_status_t eficonfig_get_unused_bootoption(u16 *buf, efi_uintn_t buf_size,
> > + unsigned int *index)
> > +{
> > + u32 i;
> > + efi_status_t ret;
> > + efi_uintn_t size;
> > +
> > + if (buf_size < u16_strsize(u"Boot####"))
> > + return EFI_BUFFER_TOO_SMALL;
> > +
> > + for (i = 0; i <= 0xFFFF; i++) {
> > + size = 0;
> > + efi_create_indexed_name(buf, buf_size, "Boot", i);
> > + ret = efi_get_variable_int(buf, &efi_global_variable_guid,
> > + NULL, &size, NULL, NULL);
> > + if (ret == EFI_BUFFER_TOO_SMALL)
> > + continue;
> > + else
> > + break;
> > + }
> > +
> > + if (i > 0xFFFF)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + *index = i;
> > +
> > + return EFI_SUCCESS;
> > +}
> > +
> > +static efi_status_t eficonfig_set_boot_option(u16 *varname, struct efi_device_path *dp,
> > + u16 *label, char *optional_data)
> > +{
> > + void *p = NULL;
> > + efi_status_t ret;
> > + efi_uintn_t size;
> > + struct efi_load_option lo;
> > +
> > + lo.file_path = dp;
> > + lo.file_path_length = efi_dp_size(dp) + sizeof(END);
> > + lo.attributes = LOAD_OPTION_ACTIVE;
> > + lo.optional_data = optional_data;
> > + lo.label = label;
> > +
> > + size = efi_serialize_load_option(&lo, (u8 **)&p);
> > + if (!size)
> > + return EFI_INVALID_PARAMETER;
> > +
> > + ret = efi_set_variable_int(varname, &efi_global_variable_guid,
> > + EFI_VARIABLE_NON_VOLATILE |
> > + EFI_VARIABLE_BOOTSERVICE_ACCESS |
> > + EFI_VARIABLE_RUNTIME_ACCESS,
> > + size, p, false);
> > + free(p);
> > +
> > + return ret;
> > +}
> > +
> > +efi_status_t eficonfig_append_bootorder(u16 index)
> > +{
> > + u16 *bootorder;
> > + efi_status_t ret;
> > + u16 *new_bootorder = NULL;
> > + efi_uintn_t last, size, new_size;
> > +
> > + /* append new boot option */
> > + bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
> > + last = size / sizeof(u16);
> > + new_size = size + sizeof(u16);
> > + new_bootorder = calloc(1, new_size);
> > + if (!new_bootorder) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto out;
> > + }
> > + memcpy(new_bootorder, bootorder, size);
> > + new_bootorder[last] = index;
> > +
> > + ret = efi_set_variable_int(u"BootOrder", &efi_global_variable_guid,
> > + EFI_VARIABLE_NON_VOLATILE |
> > + EFI_VARIABLE_BOOTSERVICE_ACCESS |
> > + EFI_VARIABLE_RUNTIME_ACCESS,
> > + new_size, new_bootorder, false);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > +out:
> > + free(bootorder);
> > + free(new_bootorder);
> > +
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_convert_dp_to_device_name(struct efi_device_path *dp,
> > + char *buf, int size)
>
> This function seems to be generic enough to live in lib/efi_loader/ as a
> library function.
>
> > +{
> > + u32 i;
> > + efi_status_t ret;
> > + struct efi_handler *handler;
> > + efi_uintn_t count, dp_size, iter_dp_size;
> > + efi_handle_t *volume_handles = NULL;
> > + struct efi_device_path *iter_dp;
> > +
> > + if (!dp || !buf || !size)
> > + return EFI_INVALID_PARAMETER;
> > +
> > + ret = efi_locate_handle_buffer_int(BY_PROTOCOL, &efi_simple_file_system_protocol_guid,
> > + NULL, &count, (efi_handle_t **)&volume_handles);
>
> Please, use efi_dp_find_obj() to retrieve the handle.
>
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + dp_size = efi_dp_size(dp);
> > +
> > + for (i = 0; i < count; i++) {
> > + struct efi_block_io *block_io;
> > +
> > + ret = efi_search_protocol(volume_handles[i],
> > + &efi_simple_file_system_protocol_guid, &handler);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > +
> > + ret = efi_search_protocol(volume_handles[i], &efi_guid_device_path, &handler);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > + ret = efi_protocol_open(handler, (void **)&iter_dp,
> > + efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > +
> > + ret = efi_search_protocol(volume_handles[i], &efi_block_io_guid, &handler);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > + ret = efi_protocol_open(handler, (void **)&block_io,
> > + efi_root, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + continue;
> > +
> > + iter_dp_size = efi_dp_size(iter_dp);
> > + if (dp_size == iter_dp_size) {
> > + if (memcmp(dp, iter_dp, dp_size) == 0) {
> > + efi_disk_get_device_name(block_io, buf, size);
> > + return EFI_SUCCESS;
> > + }
> > + }
> > + }
> > +
> > + return EFI_NOT_FOUND;
> > +}
> > +
> > +static efi_status_t create_boot_option_entry(void *data, char *title, u16 *val,
> > + eficonfig_entry_func func, struct eficonfig_item *iter)
> > +{
> > + u32 len;
> > + char *p;
> > +
> > + len = strlen(title) + 1;
> > + if (val)
> > + len += utf16_utf8_strlen(val);
> > + iter->title = calloc(1, len);
> > + if (!iter->title)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + strcpy(iter->title, title);
> > + if (val) {
> > + p = iter->title + strlen(title);
> > + utf16_utf8_strcpy(&p, val);
> > + }
> > +
> > + iter->func = func;
> > + iter->data = data;
> > +
> > + return EFI_SUCCESS;
> > +}
> > +
> > +/**
> > + * eficonfig_show_boot_option() - prepare menu entry for editing boot option
> > + *
> > + * Construct the structures to create edit boot option menu
> > + *
> > + * @bo: pointer to the boot option
> > + * @header_str: pointer to the header string
> > + * Return: status code
> > + */
> > +static efi_status_t eficonfig_show_boot_option(struct eficonfig_boot_option *bo,
> > + char *header_str)
> > +{
> > + u32 i, len;
> > + u16 *file_name, *p;
> > + struct eficonfig_item *menu_item, *iter;
> > + efi_status_t ret = EFI_OUT_OF_RESOURCES;
> > + char devname[BOOTMENU_DEVICE_NAME_MAX] = {0};
> > +
> > + menu_item = calloc(EFICONFIG_EDIT_BOOT_OPTION_MENU_ENTRY, sizeof(struct eficonfig_item));
> > + if (!menu_item)
> > + goto out;
> > +
> > + iter = menu_item;
> > +
> > + ret = create_boot_option_entry(bo, "Description: ", bo->description,
> > + eficonfig_boot_add_enter_description, iter++);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + /* file name */
> > + eficonfig_convert_dp_to_device_name(bo->file_info.dp_volume, devname,
> > + BOOTMENU_DEVICE_NAME_MAX);
> > + /*
> > + * efi_convert_device_path_to_text() automatically adds u'/' at the beginning of
> > + * file name, add manually u'/' at the last of device name if there is no u'/'
>
> There is nothing manual here.
>
> %s/add manually u'\/' at the last of device name/append u'\/'/
>
> > + * at bo->file_info.current_path[0].
> > + */
> > + if (bo->file_info.current_path[0] != u'\0' && bo->file_info.current_path[0] != u'/')
> > + strlcat(devname, "/", BOOTMENU_DEVICE_NAME_MAX);
> > +
> > + len = strlen(devname);
> > + len += utf16_utf8_strlen(bo->file_info.current_path) + 1;
> > + file_name = calloc(1, len * sizeof(u16));
> > + if (!file_name)
> > + goto out;
> > +
> > + p = file_name;
> > + utf8_utf16_strcpy(&p, devname);
> > + u16_strlcat(file_name, bo->file_info.current_path, len);
> > + ret = create_boot_option_entry(&bo->file_info, "File: ", file_name,
> > + eficonfig_select_file_handler, iter++);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + ret = create_boot_option_entry(bo, "Optional Data: ", bo->optional_data,
> > + eficonfig_boot_add_optional_data, iter++);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + ret = create_boot_option_entry(bo, "Save", NULL,
> > + eficonfig_boot_edit_save, iter++);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + ret = create_boot_option_entry(bo, "Quit", NULL,
> > + eficonfig_boot_edit_quit, iter++);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + ret = eficonfig_process_common(menu_item, EFICONFIG_EDIT_BOOT_OPTION_MENU_ENTRY,
> > + header_str);
> > +
> > +out:
> > + iter = menu_item;
> > + for (i = 0; i < EFICONFIG_EDIT_BOOT_OPTION_MENU_ENTRY; i++) {
> > + free(iter->title);
> > + iter++;
> > + }
> > +
> > + free(file_name);
> > + free(menu_item);
> > +
> > + return ret;
> > +}
> > +
> > +/**
> > + * eficonfig_edit_boot_option() - prepare boot option structure for editing
> > + *
> > + * Construct the boot option structure and copy the existing value
> > + *
> > + * @varname: pointer to the uefi variable name
> > + * @bo: pointer to the boot option
> > + * @description: pointer to the description
> > + * @optional_data: pointer to the optional_data
> > + * @optional_data_size: optional_data_size
> > + * @dp: pointer to the device path
> > + * @header_str: pointer to the header string
> > + * Return : status code
> > + */
> > +static efi_status_t eficonfig_edit_boot_option(u16 *varname, struct eficonfig_boot_option *bo,
> > + u16 *description, const u8 *optional_data,
> > + efi_uintn_t optional_data_size,
> > + struct efi_device_path *dp,
> > + char *header_str)
> > +{
> > + size_t len;
> > + char *buf = NULL;
> > + efi_status_t ret;
> > + char *iter = NULL;
> > + char *tmp = NULL, *p;
> > + efi_uintn_t dp_size, fp_size;
> > + struct efi_device_path *device_dp = NULL;
> > + struct efi_device_path_file_path *fp;
> > +
> > + bo->file_info.current_path = calloc(1, EFICONFIG_FILE_PATH_BUF_SIZE);
> > + if (!bo->file_info.current_path) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto out;
> > + }
> > +
> > + bo->description = calloc(1, EFICONFIG_DESCRIPTION_MAX * sizeof(u16));
> > + if (!bo->description) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto out;
> > + }
> > +
> > + bo->optional_data = calloc(1, EFICONFIG_OPTIONAL_DATA_MAX * sizeof(u16));
> > + if (!bo->optional_data) {
> > + ret = EFI_OUT_OF_RESOURCES;
> > + goto out;
> > + }
> > +
> > + if (description && u16_strlen(description) >= EFICONFIG_DESCRIPTION_MAX) {
> > + ret = EFI_INVALID_PARAMETER;
> > + goto out;
> > + }
> > + if (description)
> > + u16_strcpy(bo->description, description);
> > +
> > + if (dp) {
> > + u16 *file_str;
> > + struct efi_device_path *file_dp = NULL;
> > +
> > + efi_dp_split_file_path(dp, &device_dp, &file_dp);
> > + bo->file_info.dp_volume = device_dp;
> > + file_str = efi_dp_str(file_dp);
> > + u16_strcpy(bo->file_info.current_path, file_str);
> > + efi_free_pool(file_dp);
> > + efi_free_pool(file_str);
> > + }
> > +
> > + if (optional_data && optional_data_size >= EFICONFIG_OPTIONAL_DATA_MAX * sizeof(u16)) {
> > + ret = EFI_INVALID_PARAMETER;
> > + goto out;
> > + }
> > + if (optional_data && optional_data_size > 0)
> > + memcpy(bo->optional_data, optional_data, optional_data_size);
> > +
> > + while (1) {
> > + ret = eficonfig_show_boot_option(bo, header_str);
> > + if (ret == EFI_SUCCESS && bo->edit_completed)
> > + break;
> > + if (ret == EFI_NOT_READY)
> > + continue;
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > + }
> > +
> > + dp_size = efi_dp_size(bo->file_info.dp_volume);
> > + fp_size = sizeof(struct efi_device_path) +
> > + ((u16_strlen(bo->file_info.current_path) + 1) * sizeof(u16));
> > + buf = calloc(1, dp_size + fp_size + sizeof(END));
> > + if (!buf)
> > + goto out;
> > +
> > + iter = buf;
> > + memcpy(iter, bo->file_info.dp_volume, dp_size);
> > + iter += dp_size;
> > +
> > + fp = (struct efi_device_path_file_path *)iter;
> > + fp->dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE;
> > + fp->dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH;
> > + fp->dp.length = (u16)fp_size;
> > + u16_strcpy(fp->str, bo->file_info.current_path);
> > + iter += fp_size;
> > + *((struct efi_device_path *)iter) = END;
> > +
> > + len = utf16_utf8_strlen(bo->optional_data) + 1;
> > + tmp = calloc(1, len);
> > + if (!tmp)
> > + goto out;
> > + p = tmp;
> > + utf16_utf8_strncpy(&p, bo->optional_data, u16_strlen(bo->optional_data));
> > +
> > + ret = eficonfig_set_boot_option(varname, (struct efi_device_path *)buf,
> > + bo->description, tmp);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > +out:
> > + free(tmp);
> > + free(buf);
> > + free(bo->optional_data);
> > + free(bo->description);
> > + free(bo->file_info.current_path);
> > + efi_free_pool(device_dp);
> > +
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_process_add_boot_option(void *data)
> > +{
> > + u16 varname[9];
> > + efi_status_t ret;
> > + struct eficonfig_boot_option *bo = NULL;
> > +
> > + bo = calloc(1, sizeof(struct eficonfig_boot_option));
> > + if (!bo)
> > + return EFI_OUT_OF_RESOURCES;
> > +
> > + ret = eficonfig_get_unused_bootoption(varname, sizeof(varname), &bo->boot_index);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + ret = eficonfig_edit_boot_option(varname, bo, NULL, NULL, 0, NULL,
> > + " ** Add Boot Option ** ");
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > + ret = eficonfig_append_bootorder((u16)bo->boot_index);
> > + if (ret != EFI_SUCCESS)
> > + goto out;
> > +
> > +out:
> > + free(bo);
> > +
> > + /* to stay the parent menu */
> > + ret = (ret == EFI_ABORTED) ? EFI_SUCCESS : ret;
> > +
> > + return ret;
> > +}
> > +
> > +static efi_status_t eficonfig_init(void)
> > +{
> > + efi_status_t ret;
> > + static bool init;
> > + struct efi_handler *handler;
> > +
> > + if (!init) {
> > + ret = efi_search_protocol(efi_root, &efi_guid_text_input_protocol, &handler);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + ret = efi_protocol_open(handler, (void **)&cin, efi_root, NULL,
> > + EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + ret = efi_search_protocol(efi_root, &efi_guid_text_output_protocol, &handler);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + ret = efi_protocol_open(handler, (void **)&cout, efi_root, NULL,
> > + EFI_OPEN_PROTOCOL_GET_PROTOCOL);
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > + }
> > +
> > + init = true;
> > +
> > + return ret;
> > +}
> > +
> > +static const struct eficonfig_item maintenance_menu_items[] = {
> > + {"Add Boot Option", eficonfig_process_add_boot_option},
> > + {"Quit", eficonfig_process_quit},
> > +};
> > +
> > +int do_eficonfig(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> > +{
> > + efi_status_t ret;
> > +
> > + if (argc > 1)
> > + return CMD_RET_USAGE;
> > +
> > + ret = efi_init_obj_list();
>
> We should add efi_init_obj_list() to init_sequence_r[] in a future patch
> to avoid calling it it in many different places.
Should we?
The reason that the function is called in every efi-related command is,
I believe, that UEFI subsystem is optional and so it is expected to be
started only if users expect so (to avoid increase start-up time?).
-Takahiro Akashi
> > + if (ret != EFI_SUCCESS) {
> > + log_err("Error: Cannot initialize UEFI sub-system, r = %lu\n",
> > + ret & ~EFI_ERROR_MASK);
> > +
> > + return CMD_RET_FAILURE;
> > + }
> > +
> > + ret = eficonfig_init();
> > + if (ret != EFI_SUCCESS)
> > + return CMD_RET_FAILURE;
> > +
> > + while (1) {
> > + ret = eficonfig_process_common(maintenance_menu_items,
> > + ARRAY_SIZE(maintenance_menu_items),
> > + " ** UEFI Maintenance Menu **");
> > + if (ret == EFI_ABORTED)
> > + break;
> > + }
> > +
> > + return CMD_RET_SUCCESS;
> > +}
> > +
> > +U_BOOT_CMD(
> > + eficonfig, 1, 0, do_eficonfig,
> > + "provide menu-driven UEFI variable maintenance interface",
> > + ""
> > +);
> > diff --git a/include/efi_config.h b/include/efi_config.h
> > new file mode 100644
> > index 0000000000..1b48e47c48
> > --- /dev/null
> > +++ b/include/efi_config.h
> > @@ -0,0 +1,91 @@
> > +/* SPDX-License-Identifier: GPL-2.0+ */
> > +/*
> > + * Menu-driven UEFI Variable maintenance
> > + *
> > + * Copyright (c) 2022 Masahisa Kojima, Linaro Limited
> > + */
> > +
> > +#ifndef _EFI_CONFIG_H
> > +#define _EFI_CONFIG_H
> > +
> > +#define EFICONFIG_ENTRY_NUM_MAX 99
> > +#define EFICONFIG_FILE_PATH_MAX 512
> > +#define EFICONFIG_FILE_PATH_BUF_SIZE (EFICONFIG_FILE_PATH_MAX * sizeof(u16))
> > +
> > +typedef efi_status_t (*eficonfig_entry_func)(void *data);
> > +
> > +/**
> > + * struct eficonfig_entry - menu entry structure
> > + *
> > + * @num: menu entry index
> > + * @title: title of entry
> > + * @key: unique key
> > + * @efi_menu: pointer to the menu structure
> > + * @next: pointer to the next entry
> > + * @func: callback function to be called when this entry is selected
> > + * @data: data to be passed to the callback function
> > + */
> > +struct eficonfig_entry {
> > + u32 num;
> > + char *title;
> > + char key[3];
> > + struct efimenu *efi_menu;
> > + struct eficonfig_entry *next;
> > + eficonfig_entry_func func;
> > + void *data;
> > +};
> > +
> > +/**
> > + * struct efimenu - efi menu structure
> > + *
> > + * @delay: delay for autoboot
> > + * @active: active menu entry index
> > + * @count: total count of menu entry
> > + * @menu_header: menu header string
> > + * @first: pointer to the first menu entry
> > + */
> > +struct efimenu {
> > + int delay;
> > + int active;
> > + int count;
> > + char *menu_header;
> > + struct eficonfig_entry *first;
> > +};
> > +
> > +/**
> > + * struct eficonfig_item - structure to construct eficonfig_entry
> > + *
> > + * @title: title of entry
> > + * @func: callback function to be called when this entry is selected
> > + * @data: data to be passed to the callback function
> > + */
> > +struct eficonfig_item {
> > + char *title;
> > + eficonfig_entry_func func;
> > + void *data;
> > +};
> > +
> > +/**
> > + * struct eficonfig_select_file_info - structure to be used for file selection
> > + *
> > + * @current_volume: pointer to the efi_simple_file_system_protocol
> > + * @dp_volume: pointer to device path of the selected device
> > + * @current_path: pointer to the selected file path string
> > + * @file_selectred: flag indicates file selecting status
> > + * @filepath_list: list_head structure for file path list
> > + */
> > +struct eficonfig_select_file_info {
> > + struct efi_simple_file_system_protocol *current_volume;
> > + struct efi_device_path *dp_volume;
> > + u16 *current_path;
> > + struct list_head filepath_list;
> > + bool file_selected;
> > +};
> > +
> > +void eficonfig_print_msg(char *msg);
> > +efi_status_t eficonfig_process_quit(void *data);
> > +efi_status_t eficonfig_process_common(const struct eficonfig_item *items, int count,
> > + char *menu_header);
> > +efi_status_t eficonfig_select_file_handler(void *data);
> > +
> > +#endif
> > diff --git a/include/efi_loader.h b/include/efi_loader.h
> > index c6df29993c..365ce9493e 100644
> > --- a/include/efi_loader.h
> > +++ b/include/efi_loader.h
> > @@ -226,6 +226,9 @@ const char *__efi_nesting_dec(void);
> > #define EFI_CACHELINE_SIZE 128
> > #endif
> >
> > +/* max bootmenu title size for volume selection */
> > +#define BOOTMENU_DEVICE_NAME_MAX 16
> > +
> > /* Key identifying current memory map */
> > extern efi_uintn_t efi_memory_map_key;
> >
> > @@ -249,6 +252,9 @@ extern const struct efi_hii_string_protocol efi_hii_string;
> >
> > uint16_t *efi_dp_str(struct efi_device_path *dp);
> >
> > +/* GUID for the auto generated boot menu entry */
> > +extern const efi_guid_t efi_guid_bootmenu_auto_generated;
> > +
> > /* GUID of the U-Boot root node */
> > extern const efi_guid_t efi_u_boot_guid;
> > #ifdef CONFIG_SANDBOX
> > @@ -314,6 +320,9 @@ extern const efi_guid_t efi_guid_firmware_management_protocol;
> > extern const efi_guid_t efi_esrt_guid;
> > /* GUID of the SMBIOS table */
> > extern const efi_guid_t smbios_guid;
> > +/*GUID of console */
> > +extern const efi_guid_t efi_guid_text_input_protocol;
> > +extern const efi_guid_t efi_guid_text_output_protocol;
> >
> > extern char __efi_runtime_start[], __efi_runtime_stop[];
> > extern char __efi_runtime_rel_start[], __efi_runtime_rel_stop[];
> > @@ -883,6 +892,8 @@ efi_status_t efi_set_load_options(efi_handle_t handle,
> > void *load_options);
> > efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options);
> >
> > +efi_status_t efi_bootmenu_show_maintenance_menu(void);
> > +
> > /**
> > * struct efi_image_regions - A list of memory regions
> > *
> > @@ -1054,4 +1065,33 @@ efi_status_t efi_esrt_populate(void);
> > efi_status_t efi_load_capsule_drivers(void);
> >
> > efi_status_t platform_get_eventlog(struct udevice *dev, u64 *addr, u32 *sz);
> > +
> > +efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
> > + const efi_guid_t *protocol, void *search_key,
> > + efi_uintn_t *no_handles, efi_handle_t **buffer);
> > +
> > +efi_status_t efi_open_volume_int(struct efi_simple_file_system_protocol *this,
> > + struct efi_file_handle **root);
> > +efi_status_t efi_file_open_int(struct efi_file_handle *this,
> > + struct efi_file_handle **new_handle,
> > + u16 *file_name, u64 open_mode,
> > + u64 attributes);
> > +efi_status_t efi_file_close_int(struct efi_file_handle *file);
> > +efi_status_t efi_file_read_int(struct efi_file_handle *this,
> > + efi_uintn_t *buffer_size, void *buffer);
> > +efi_status_t efi_file_setpos_int(struct efi_file_handle *file, u64 pos);
> > +
> > +typedef efi_status_t (*efi_console_filter_func)(struct efi_input_key *key);
> > +efi_status_t efi_console_get_u16_string
> > + (struct efi_simple_text_input_protocol *cin,
> > + struct efi_simple_text_output_protocol *cout,
> > + u16 *buf, efi_uintn_t count, efi_console_filter_func filer_func,
> > + int row, int col);
> > +
> > +efi_status_t eficonfig_get_unused_bootoption(u16 *buf,
> > + efi_uintn_t buf_size, u32 *index);
> > +efi_status_t eficonfig_append_bootorder(u16 index);
> > +
> > +efi_status_t efi_disk_get_device_name(struct efi_block_io *this, char *buf, int size);
> > +
> > #endif /* _EFI_LOADER_H */
> > diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
> > index 4da64b5d29..1233418e77 100644
> > --- a/lib/efi_loader/efi_boottime.c
> > +++ b/lib/efi_loader/efi_boottime.c
> > @@ -2453,6 +2453,35 @@ static efi_status_t EFIAPI efi_protocols_per_handle(
> > return EFI_EXIT(EFI_SUCCESS);
> > }
> >
> > +efi_status_t efi_locate_handle_buffer_int(enum efi_locate_search_type search_type,
> > + const efi_guid_t *protocol, void *search_key,
> > + efi_uintn_t *no_handles, efi_handle_t **buffer)
> > +{
> > + efi_status_t r;
> > + efi_uintn_t buffer_size = 0;
> > +
> > + if (!no_handles || !buffer) {
> > + r = EFI_INVALID_PARAMETER;
> > + goto out;
> > + }
> > + *no_handles = 0;
> > + *buffer = NULL;
> > + r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > + *buffer);
> > + if (r != EFI_BUFFER_TOO_SMALL)
> > + goto out;
> > + r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
> > + (void **)buffer);
> > + if (r != EFI_SUCCESS)
> > + goto out;
> > + r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > + *buffer);
> > + if (r == EFI_SUCCESS)
> > + *no_handles = buffer_size / sizeof(efi_handle_t);
> > +out:
> > + return r;
> > +}
> > +
> > /**
> > * efi_locate_handle_buffer() - locate handles implementing a protocol
> > * @search_type: selection criterion
> > @@ -2474,30 +2503,13 @@ efi_status_t EFIAPI efi_locate_handle_buffer(
> > efi_uintn_t *no_handles, efi_handle_t **buffer)
> > {
> > efi_status_t r;
> > - efi_uintn_t buffer_size = 0;
> >
> > EFI_ENTRY("%d, %pUs, %p, %p, %p", search_type, protocol, search_key,
> > no_handles, buffer);
> >
> > - if (!no_handles || !buffer) {
> > - r = EFI_INVALID_PARAMETER;
> > - goto out;
> > - }
> > - *no_handles = 0;
> > - *buffer = NULL;
> > - r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > - *buffer);
> > - if (r != EFI_BUFFER_TOO_SMALL)
> > - goto out;
> > - r = efi_allocate_pool(EFI_BOOT_SERVICES_DATA, buffer_size,
> > - (void **)buffer);
> > - if (r != EFI_SUCCESS)
> > - goto out;
> > - r = efi_locate_handle(search_type, protocol, search_key, &buffer_size,
> > - *buffer);
> > - if (r == EFI_SUCCESS)
> > - *no_handles = buffer_size / sizeof(efi_handle_t);
> > -out:
> > + r = efi_locate_handle_buffer_int(search_type, protocol, search_key,
> > + no_handles, buffer);
> > +
> > return EFI_EXIT(r);
> > }
> >
> > diff --git a/lib/efi_loader/efi_console.c b/lib/efi_loader/efi_console.c
> > index 60a3fc85ac..ca8e38b8eb 100644
> > --- a/lib/efi_loader/efi_console.c
> > +++ b/lib/efi_loader/efi_console.c
> > @@ -5,6 +5,7 @@
> > * Copyright (c) 2016 Alexander Graf
> > */
> >
> > +#include <ansi.h>
> > #include <common.h>
> > #include <charset.h>
> > #include <malloc.h>
> > @@ -1312,3 +1313,80 @@ out_of_memory:
> > printf("ERROR: Out of memory\n");
> > return r;
> > }
> > +
> > +/**
> > + * efi_console_get_u16_string() - get user input string
> > + *
> > + * @cin: protocol interface to EFI_SIMPLE_TEXT_INPUT_PROTOCOL
> > + * @cout: protocol interface to EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL
> > + * @buf: buffer to store user input string in UTF16
> > + * @count: number of u16 string including NULL terminator that buf has
> > + * @filter_func: callback to filter user input
> > + * @row: row number to locate user input form
> > + * @col: column number to locate user input form
> > + * Return: status code
> > + */
> > +efi_status_t efi_console_get_u16_string(struct efi_simple_text_input_protocol *cin,
> > + struct efi_simple_text_output_protocol *cout,
> > + u16 *buf, efi_uintn_t count,
> > + efi_console_filter_func filter_func,
> > + int row, int col)
> > +{
> > + efi_status_t ret;
> > + efi_uintn_t len = 0;
> > + struct efi_input_key key;
> > +
> > + printf(ANSI_CURSOR_POSITION, row, col);
> > + puts(ANSI_CLEAR_LINE_TO_END);
> > + puts(ANSI_CURSOR_SHOW);
>
> One printf() statement is enough and reduces code size:
>
> printf(ANSI_CURSOR_POSITION ANSI_CLEAR_LINE_TO_END ANSI_CURSOR_SHOW,
> row col);
>
> > +
> > + ret = EFI_CALL(cin->reset(cin, false));
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + for (;;) {
> > + do {
> > + ret = EFI_CALL(cin->read_key_stroke(cin, &key));
> > + mdelay(10);
> > + } while (ret == EFI_NOT_READY);
> > +
> > + if (key.unicode_char == u'\b') {
> > + if (len > 0)
> > + buf[--len] = u'\0';
> > +
> > + printf(ANSI_CURSOR_POSITION, row, col);
> > + ret = EFI_CALL(cout->output_string(cout, buf));
>
> Please, use %ls to print u16 strings:
>
> printf("ANSI_CURSOR_POSITION "%ls" ANSI_CLEAR_LINE_TO_END,
> row, col, buf);
>
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > +
> > + puts(ANSI_CLEAR_LINE_TO_END);
> > + continue;
> > + } else if (key.unicode_char == u'\r') {
> > + buf[len] = u'\0';
> > + return EFI_SUCCESS;
> > + } else if (key.unicode_char == 0x3 || key.scan_code == 23) {
> > + return EFI_ABORTED;
> > + } else if (key.unicode_char < 0x20) {
> > + /* ignore control codes other than Ctrl+C, '\r' and '\b' */
> > + continue;
> > + } else if (key.scan_code != 0) {
> > + /* only accept single ESC press for cancel */
> > + continue;
> > + }
> > +
> > + if (filter_func) {
> > + if (filter_func(&key) != EFI_SUCCESS)
> > + continue;
> > + }
> > +
> > + if (len >= (count - 1))
> > + continue;
> > +
> > + buf[len] = key.unicode_char;
> > + len++;
> > + printf(ANSI_CURSOR_POSITION, row, col);
> > + ret = EFI_CALL(cout->output_string(cout, buf));
>
> Please use %ls:
>
> printf(ANSI_CURSOR_POSITION "%ls", row, col, buf);
>
> > + if (ret != EFI_SUCCESS)
> > + return ret;
> > + }
> > +}
> > diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c
> > index 1e82f52dc0..efc2f20ff0 100644
> > --- a/lib/efi_loader/efi_disk.c
> > +++ b/lib/efi_loader/efi_disk.c
> > @@ -778,3 +778,14 @@ efi_status_t efi_disk_init(void)
> >
> > return EFI_SUCCESS;
> > }
> > +
> > +efi_status_t efi_disk_get_device_name(struct efi_block_io *this, char *buf, int size)
> > +{
> > + struct efi_disk_obj *diskobj;
> > +
> > + diskobj = container_of(this, struct efi_disk_obj, ops);
>
> This will fail if the EFI_BLOCK_IO_PROTOCOL is provided by a driver
> loaded via the bootefi command.
>
> Handles can only be created by U-Boot in contrast to protocol
> interfaces. What you need is the udevice as a field in struct efi_object
> instead of struct efi_disk_obj. See Takahiro's comment in
> lib/efi_loader/efi_disk.c:49:
>
> struct udevice *dev; /* TODO: move it to efi_object */
>
> Best regards
>
> Heinrich
>
> > +
> > + snprintf(buf, size, "%s %d:%d", diskobj->ifname, diskobj->dev_index, diskobj->part);
> > +
> > + return EFI_SUCCESS;
> > +}
> > diff --git a/lib/efi_loader/efi_file.c b/lib/efi_loader/efi_file.c
> > index 7a7077e6d0..c96a7f7ca3 100644
> > --- a/lib/efi_loader/efi_file.c
> > +++ b/lib/efi_loader/efi_file.c
> > @@ -246,10 +246,10 @@ error:
> > return NULL;
> > }
> >
> > -static efi_status_t efi_file_open_int(struct efi_file_handle *this,
> > - struct efi_file_handle **new_handle,
> > - u16 *file_name, u64 open_mode,
> > - u64 attributes)
> > +efi_status_t efi_file_open_int(struct efi_file_handle *this,
> > + struct efi_file_handle **new_handle,
> > + u16 *file_name, u64 open_mode,
> > + u64 attributes)
> > {
> > struct file_handle *fh = to_fh(this);
> > efi_status_t ret;
> > @@ -369,11 +369,17 @@ static efi_status_t file_close(struct file_handle *fh)
> > return EFI_SUCCESS;
> > }
> >
> > -static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
> > +efi_status_t efi_file_close_int(struct efi_file_handle *file)
> > {
> > struct file_handle *fh = to_fh(file);
> > +
> > + return file_close(fh);
> > +}
> > +
> > +static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
> > +{
> > EFI_ENTRY("%p", file);
> > - return EFI_EXIT(file_close(fh));
> > + return EFI_EXIT(efi_file_close_int(file));
> > }
> >
> > static efi_status_t EFIAPI efi_file_delete(struct efi_file_handle *file)
> > @@ -562,8 +568,8 @@ static efi_status_t dir_read(struct file_handle *fh, u64 *buffer_size,
> > return EFI_SUCCESS;
> > }
> >
> > -static efi_status_t efi_file_read_int(struct efi_file_handle *this,
> > - efi_uintn_t *buffer_size, void *buffer)
> > +efi_status_t efi_file_read_int(struct efi_file_handle *this,
> > + efi_uintn_t *buffer_size, void *buffer)
> > {
> > struct file_handle *fh = to_fh(this);
> > efi_status_t ret = EFI_SUCCESS;
> > @@ -773,24 +779,11 @@ out:
> > return EFI_EXIT(ret);
> > }
> >
> > -/**
> > - * efi_file_setpos() - set current position in file
> > - *
> > - * This function implements the SetPosition service of the EFI file protocol.
> > - * See the UEFI spec for details.
> > - *
> > - * @file: file handle
> > - * @pos: new file position
> > - * Return: status code
> > - */
> > -static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> > - u64 pos)
> > +efi_status_t efi_file_setpos_int(struct efi_file_handle *file, u64 pos)
> > {
> > struct file_handle *fh = to_fh(file);
> > efi_status_t ret = EFI_SUCCESS;
> >
> > - EFI_ENTRY("%p, %llu", file, pos);
> > -
> > if (fh->isdir) {
> > if (pos != 0) {
> > ret = EFI_UNSUPPORTED;
> > @@ -812,6 +805,28 @@ static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> > fh->offset = pos;
> >
> > error:
> > + return ret;
> > +}
> > +
> > +/**
> > + * efi_file_setpos() - set current position in file
> > + *
> > + * This function implements the SetPosition service of the EFI file protocol.
> > + * See the UEFI spec for details.
> > + *
> > + * @file: file handle
> > + * @pos: new file position
> > + * Return: status code
> > + */
> > +static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
> > + u64 pos)
> > +{
> > + efi_status_t ret = EFI_SUCCESS;
> > +
> > + EFI_ENTRY("%p, %llu", file, pos);
> > +
> > + ret = efi_file_setpos_int(file, pos);
> > +
> > return EFI_EXIT(ret);
> > }
> >
> > @@ -1138,17 +1153,23 @@ struct efi_file_handle *efi_file_from_path(struct efi_device_path *fp)
> > return f;
> > }
> >
> > +efi_status_t efi_open_volume_int(struct efi_simple_file_system_protocol *this,
> > + struct efi_file_handle **root)
> > +{
> > + struct file_system *fs = to_fs(this);
> > +
> > + *root = file_open(fs, NULL, NULL, 0, 0);
> > +
> > + return EFI_SUCCESS;
> > +}
> > +
> > static efi_status_t EFIAPI
> > efi_open_volume(struct efi_simple_file_system_protocol *this,
> > struct efi_file_handle **root)
> > {
> > - struct file_system *fs = to_fs(this);
> > -
> > EFI_ENTRY("%p, %p", this, root);
> >
> > - *root = file_open(fs, NULL, NULL, 0, 0);
> > -
> > - return EFI_EXIT(EFI_SUCCESS);
> > + return EFI_EXIT(efi_open_volume_int(this, root));
> > }
> >
> > struct efi_simple_file_system_protocol *
>
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