Re: [PATCH v8 1/4] Move bootorder and bootoption apis to lib

On Tue, Jun 06, 2023 at 09:37:18AM -0700, Raymond Mao wrote:

Rename and move bootorder and bootoption apis from cmd to lib for re-use between eficonfig and bootmgr Fix 'unexpected indentation' when 'make htmldocs' after functions are moved

Signed-off-by: Raymond Mao raymond.mao@linaro.org

Changes in v3

• Split the patch into moving and renaming functions and individual patches for each changed functionality

Changes in v6

• Revert v3 changes in function efi_bootmgr_update_media_device_boot_option and efi_bootmgr_delete_invalid_boot_option

Changes in v8

• Fix 'unexpected indentation' when 'make htmldocs'

cmd/bootmenu.c | 2 +- cmd/eficonfig.c | 408 +---------------------------------- include/efi_config.h | 5 - include/efi_loader.h | 11 + lib/efi_loader/efi_bootmgr.c | 375 ++++++++++++++++++++++++++++++++ lib/efi_loader/efi_helper.c | 25 +++ 6 files changed, 418 insertions(+), 408 deletions(-)

diff --git a/cmd/bootmenu.c b/cmd/bootmenu.c index 6baeedc69f..01daddca7b 100644 --- a/cmd/bootmenu.c +++ b/cmd/bootmenu.c @@ -351,7 +351,7 @@ static struct bootmenu_data *bootmenu_create(int delay) * UEFI specification requires booting from removal media using * a architecture-specific default image name such as BOOTAA64.EFI. */

• efi_ret = eficonfig_generate_media_device_boot_option();
  

• efi_ret = efi_bootmgr_update_media_device_boot_option();
  

  if (efi_ret != EFI_SUCCESS && efi_ret != EFI_NOT_FOUND) goto cleanup;

diff --git a/cmd/eficonfig.c b/cmd/eficonfig.c index 720f52b48b..82a80306f4 100644 --- a/cmd/eficonfig.c +++ b/cmd/eficonfig.c @@ -1134,43 +1134,6 @@ out: return ret; }

-/**

• • eficonfig_get_unused_bootoption() - get unused "Boot####" index
• • @buf: pointer to the buffer to store boot option variable name
• • @buf_size: buffer size
• • @index: pointer to store the index in the BootOrder variable
• • Return: status code
• */

-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;

-}

/**

• eficonfig_set_boot_option() - set boot option

@@ -1208,46 +1171,6 @@ static efi_status_t eficonfig_set_boot_option(u16 *varname, struct efi_device_pa return ret; }

-/**

• • eficonfig_append_bootorder() - append new boot option in BootOrder variable
• • @index: "Boot####" index to append to BootOrder variable
• • Return: status code
• */

-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;

-}

/**

• create_boot_option_entry() - create boot option entry

@@ -1619,7 +1542,7 @@ static efi_status_t eficonfig_process_add_boot_option(void *data) if (!bo) return EFI_OUT_OF_RESOURCES;

• ret = eficonfig_get_unused_bootoption(varname, sizeof(varname), &bo->boot_index);

• ret = efi_bootmgr_get_unused_bootoption(varname, sizeof(varname), &bo->boot_index); if (ret != EFI_SUCCESS) return ret;

@@ -1627,7 +1550,7 @@ static efi_status_t eficonfig_process_add_boot_option(void *data) if (ret != EFI_SUCCESS) goto out;

• ret = eficonfig_append_bootorder((u16)bo->boot_index);

• ret = efi_bootmgr_append_bootorder((u16)bo->boot_index); if (ret != EFI_SUCCESS) goto out;

@@ -1656,31 +1579,6 @@ static efi_status_t eficonfig_process_boot_selected(void *data) return EFI_SUCCESS; }

-/**

• • search_bootorder() - search the boot option index in BootOrder
• • @bootorder: pointer to the BootOrder variable
• • @num: number of BootOrder entry
• • @target: target boot option index to search
• • @index: pointer to store the index of BootOrder variable
• • Return: true if exists, false otherwise
• */

-static bool search_bootorder(u16 *bootorder, efi_uintn_t num, u32 target, u32 *index) -{

• u32 i;
• for (i = 0; i < num; i++) {

• if (target == bootorder[i]) {
  

• 	if (index)
  

• 		*index = i;
  

• 	return true;
  

• }
  

• }
• return false;

-}

/**

• eficonfig_add_boot_selection_entry() - add boot option menu entry

@@ -1805,7 +1703,7 @@ static efi_status_t eficonfig_show_boot_selection(unsigned int *selected)

if (efi_varname_is_load_option(var_name16, &index)) {
	/* If the index is included in the BootOrder, skip it */

• 	if (search_bootorder(bootorder, num, index, NULL))
  

• 	if (efi_search_bootorder(bootorder, num, index, NULL))
  	continue;
  
  ret = eficonfig_add_boot_selection_entry(efi_menu, index, selected);
  

@@ -2202,7 +2100,7 @@ static efi_status_t eficonfig_create_change_boot_order_entry(struct efimenu *efi

if (efi_varname_is_load_option(var_name16, &index)) {
	/* If the index is included in the BootOrder, skip it */

• 	if (search_bootorder(bootorder, num, index, NULL))
  

• 	if (efi_search_bootorder(bootorder, num, index, NULL))
  	continue;
  
  ret = eficonfig_add_change_boot_order_entry(efi_menu, index, false);
  

@@ -2304,50 +2202,6 @@ out: return ret; }

-/**

• • delete_boot_option() - delete selected boot option
• • @boot_index: boot option index to delete
• • Return: status code
• */

-static efi_status_t delete_boot_option(u16 boot_index) -{

• u16 *bootorder;
• u16 varname[9];
• efi_status_t ret;
• unsigned int index;
• efi_uintn_t num, size;
• efi_create_indexed_name(varname, sizeof(varname),

• 		"Boot", boot_index);
  

• ret = efi_set_variable_int(varname, &efi_global_variable_guid,

• 		   0, 0, NULL, false);
  

• if (ret != EFI_SUCCESS) {

• log_err("delete boot option(%ls) failed\n", varname);
  

• return ret;
  

• }
• /* update BootOrder if necessary */
• bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
• if (!bootorder)

• return EFI_SUCCESS;
  

• num = size / sizeof(u16);
• if (!search_bootorder(bootorder, num, boot_index, &index))

• return EFI_SUCCESS;
  

• memmove(&bootorder[index], &bootorder[index + 1],

• (num - index - 1) * sizeof(u16));
  

• size -= sizeof(u16);
• ret = efi_set_variable_int(u"BootOrder", &efi_global_variable_guid,

• 		   EFI_VARIABLE_NON_VOLATILE |
  

• 		   EFI_VARIABLE_BOOTSERVICE_ACCESS |
  

• 		   EFI_VARIABLE_RUNTIME_ACCESS,
  

• 		   size, bootorder, false);
  

• return ret;

-}

/**

• eficonfig_process_delete_boot_option() - handler to delete boot option

@@ -2362,7 +2216,7 @@ static efi_status_t eficonfig_process_delete_boot_option(void *data) while (1) { ret = eficonfig_show_boot_selection(&selected); if (ret == EFI_SUCCESS)

• 	ret = delete_boot_option(selected);
  

• 	ret = efi_bootmgr_delete_boot_option(selected);
  
  

  if (ret != EFI_SUCCESS) break;

@@ -2374,256 +2228,6 @@ static efi_status_t eficonfig_process_delete_boot_option(void *data) return ret; }

-/**

• • eficonfig_enumerate_boot_option() - enumerate the possible bootable media
• • @opt: pointer to the media boot option structure
• • @volume_handles: pointer to the efi handles
• • @count: number of efi handle
• • Return: status code
• */

-efi_status_t eficonfig_enumerate_boot_option(struct eficonfig_media_boot_option *opt,

• 			     efi_handle_t *volume_handles, efi_status_t count)
  

-{

• u32 i;
• struct efi_handler *handler;
• efi_status_t ret = EFI_SUCCESS;
• for (i = 0; i < count; i++) {

• u16 *p;
  

• u16 dev_name[BOOTMENU_DEVICE_NAME_MAX];
  

• char *optional_data;
  

• struct efi_load_option lo;
  

• char buf[BOOTMENU_DEVICE_NAME_MAX];
  

• struct efi_device_path *device_path;
  

• 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_disk_get_device_name(volume_handles[i], buf, BOOTMENU_DEVICE_NAME_MAX);
  

• if (ret != EFI_SUCCESS)
  

• 	continue;
  

• p = dev_name;
  

• utf8_utf16_strncpy(&p, buf, strlen(buf));
  

• lo.label = dev_name;
  

• lo.attributes = LOAD_OPTION_ACTIVE;
  

• lo.file_path = device_path;
  

• lo.file_path_length = efi_dp_size(device_path) + sizeof(END);
  

• /*
  

•  * Set the dedicated guid to optional_data, it is used to identify
  

•  * the boot option that automatically generated by the bootmenu.
  

•  * efi_serialize_load_option() expects optional_data is null-terminated
  

•  * utf8 string, so set the "1234567" string to allocate enough space
  

•  * to store guid, instead of realloc the load_option.
  

•  */
  

• lo.optional_data = "1234567";
  

• opt[i].size = efi_serialize_load_option(&lo, (u8 **)&opt[i].lo);
  

• if (!opt[i].size) {
  

• 	ret = EFI_OUT_OF_RESOURCES;
  

• 	goto out;
  

• }
  

• /* set the guid */
  

• optional_data = (char *)opt[i].lo + (opt[i].size - u16_strsize(u"1234567"));
  

• memcpy(optional_data, &efi_guid_bootmenu_auto_generated, sizeof(efi_guid_t));
  

• }

-out:

• return ret;

-}

-/**

• • eficonfig_delete_invalid_boot_option() - delete non-existing boot option
• • @opt: pointer to the media boot option structure
• • @count: number of media boot option structure
• • Return: status code
• */

-efi_status_t eficonfig_delete_invalid_boot_option(struct eficonfig_media_boot_option *opt,

• 				  efi_status_t count)
  

-{

• efi_uintn_t size;
• void *load_option;
• u32 i, list_size = 0;
• struct efi_load_option lo;
• u16 *var_name16 = NULL;
• u16 varname[] = u"Boot####";
• efi_status_t ret = EFI_SUCCESS;
• u16 *delete_index_list = NULL, *p;
• efi_uintn_t buf_size;
• buf_size = 128;
• var_name16 = malloc(buf_size);
• if (!var_name16)

• return EFI_OUT_OF_RESOURCES;
  

• var_name16[0] = 0;
• for (;;) {

• int index;
  

• efi_guid_t guid;
  

• efi_uintn_t tmp;
  

• ret = efi_next_variable_name(&buf_size, &var_name16, &guid);
  

• if (ret == EFI_NOT_FOUND) {
  

• 	/*
  

• 	 * EFI_NOT_FOUND indicates we retrieved all EFI variables.
  

• 	 * This should be treated as success.
  

• 	 */
  

• 	ret = EFI_SUCCESS;
  

• 	break;
  

• }
  

• if (ret != EFI_SUCCESS)
  

• 	goto out;
  

• if (!efi_varname_is_load_option(var_name16, &index))
  

• 	continue;
  

• efi_create_indexed_name(varname, sizeof(varname), "Boot", index);
  

• load_option = efi_get_var(varname, &efi_global_variable_guid, &size);
  

• if (!load_option)
  

• 	continue;
  

• tmp = size;
  

• ret = efi_deserialize_load_option(&lo, load_option, &size);
  

• if (ret != EFI_SUCCESS)
  

• 	goto next;
  

• if (size >= sizeof(efi_guid_bootmenu_auto_generated) &&
  

•     !guidcmp(lo.optional_data, &efi_guid_bootmenu_auto_generated)) {
  

• 	for (i = 0; i < count; i++) {
  

• 		if (opt[i].size == tmp &&
  

• 		    memcmp(opt[i].lo, load_option, tmp) == 0) {
  

• 			opt[i].exist = true;
  

• 			break;
  

• 		}
  

• 	}
  

• 	/*
  

• 	 * The entire list of variables must be retrieved by
  

• 	 * efi_get_next_variable_name_int() before deleting the invalid
  

• 	 * boot option, just save the index here.
  

• 	 */
  

• 	if (i == count) {
  

• 		p = realloc(delete_index_list, sizeof(u32) *
  

• 			    (list_size + 1));
  

• 		if (!p) {
  

• 			ret = EFI_OUT_OF_RESOURCES;
  

• 			goto out;
  

• 		}
  

• 		delete_index_list = p;
  

• 		delete_index_list[list_size++] = index;
  

• 	}
  

• }
  

-next:

• free(load_option);
  

• }
• /* delete all invalid boot options */
• for (i = 0; i < list_size; i++) {

• ret = delete_boot_option(delete_index_list[i]);
  

• if (ret != EFI_SUCCESS)
  

• 	goto out;
  

• }

-out:

• free(var_name16);
• free(delete_index_list);
• return ret;

-}

-/**

• • eficonfig_generate_media_device_boot_option() - generate the media device boot option
• • This function enumerates all devices supporting EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
• • and generate the bootmenu entries.
• • This function also provide the BOOT#### variable maintenance for
• • the media device entries.
• • • Automatically create the BOOT#### variable for the newly detected device,

• • this BOOT#### variable is distinguished by the special GUID
    

• • stored in the EFI_LOAD_OPTION.optional_data
    

• • • If the device is not attached to the system, the associated BOOT#### variable

• • is automatically deleted.
    

• • Return: status code
• */

-efi_status_t eficonfig_generate_media_device_boot_option(void) -{

• u32 i;
• efi_status_t ret;
• efi_uintn_t count;
• efi_handle_t *volume_handles = NULL;
• struct eficonfig_media_boot_option *opt = NULL;
• 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)

• return ret;
  

• opt = calloc(count, sizeof(struct eficonfig_media_boot_option));
• if (!opt)

• goto out;
  

• /* enumerate all devices supporting EFI_SIMPLE_FILE_SYSTEM_PROTOCOL */
• ret = eficonfig_enumerate_boot_option(opt, volume_handles, count);
• if (ret != EFI_SUCCESS)

• goto out;
  

• /*

• * System hardware configuration may vary depending on the user setup.
  

• * The boot option is automatically added by the bootmenu.
  

• * If the device is not attached to the system, the boot option needs
  

• * to be deleted.
  

• */
  

• ret = eficonfig_delete_invalid_boot_option(opt, count);
• if (ret != EFI_SUCCESS)

• goto out;
  

• /* add non-existent boot option */
• for (i = 0; i < count; i++) {

• u32 boot_index;
  

• u16 var_name[9];
  

• if (!opt[i].exist) {
  

• 	ret = eficonfig_get_unused_bootoption(var_name, sizeof(var_name),
  

• 					      &boot_index);
  

• 	if (ret != EFI_SUCCESS)
  

• 		goto out;
  

• 	ret = efi_set_variable_int(var_name, &efi_global_variable_guid,
  

• 				   EFI_VARIABLE_NON_VOLATILE |
  

• 				   EFI_VARIABLE_BOOTSERVICE_ACCESS |
  

• 				   EFI_VARIABLE_RUNTIME_ACCESS,
  

• 				   opt[i].size, opt[i].lo, false);
  

• 	if (ret != EFI_SUCCESS)
  

• 		goto out;
  

• 	ret = eficonfig_append_bootorder(boot_index);
  

• 	if (ret != EFI_SUCCESS) {
  

• 		efi_set_variable_int(var_name, &efi_global_variable_guid,
  

• 				     0, 0, NULL, false);
  

• 		goto out;
  

• 	}
  

• }
  

• }

-out:

• if (opt) {

• for (i = 0; i < count; i++)
  

• 	free(opt[i].lo);
  

• }
• free(opt);
• efi_free_pool(volume_handles);
• return ret;

-}

/**

• eficonfig_init() - do required initialization for eficonfig command

@@ -2709,7 +2313,7 @@ static int do_eficonfig(struct cmd_tbl *cmdtp, int flag, int argc, char *const a if (ret != EFI_SUCCESS) return CMD_RET_FAILURE;

• ret = eficonfig_generate_media_device_boot_option();

• ret = efi_bootmgr_update_media_device_boot_option(); if (ret != EFI_SUCCESS && ret != EFI_NOT_FOUND) return ret;

diff --git a/include/efi_config.h b/include/efi_config.h index 01ce9b2b06..d7c1601137 100644 --- a/include/efi_config.h +++ b/include/efi_config.h @@ -105,11 +105,6 @@ efi_status_t eficonfig_process_common(struct efimenu *efi_menu, void (*item_data_print)(void *), char *(*item_choice)(void *)); efi_status_t eficonfig_process_select_file(void *data); -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 eficonfig_generate_media_device_boot_option(void);

efi_status_t eficonfig_append_menu_entry(struct efimenu *efi_menu, char *title, eficonfig_entry_func func, void *data); diff --git a/include/efi_loader.h b/include/efi_loader.h index 1542b4b625..31ca1f5d1d 100644 --- a/include/efi_loader.h +++ b/include/efi_loader.h @@ -516,6 +516,17 @@ extern struct list_head efi_register_notify_events; int efi_init_early(void); /* Initialize efi execution environment */ efi_status_t efi_init_obj_list(void); +/* Append new boot option in BootOrder variable */ +efi_status_t efi_bootmgr_append_bootorder(u16 index); +/* Get unused "Boot####" index */ +efi_status_t efi_bootmgr_get_unused_bootoption(u16 *buf,

• 			       efi_uintn_t buf_size, u32 *index);
  

+/* Generate the media device boot option */ +efi_status_t efi_bootmgr_update_media_device_boot_option(void); +/* Delete selected boot option */ +efi_status_t efi_bootmgr_delete_boot_option(u16 boot_index); +/* search the boot option index in BootOrder */ +bool efi_search_bootorder(u16 *bootorder, efi_uintn_t num, u32 target, u32 *index); /* Set up console modes */ void efi_setup_console_size(void); /* Install device tree */ diff --git a/lib/efi_loader/efi_bootmgr.c b/lib/efi_loader/efi_bootmgr.c index 4b24b41047..97d5b8dc2b 100644 --- a/lib/efi_loader/efi_bootmgr.c +++ b/lib/efi_loader/efi_bootmgr.c @@ -347,3 +347,378 @@ efi_status_t efi_bootmgr_load(efi_handle_t *handle, void **load_options) error: return ret; }

+/**

• • efi_bootmgr_enumerate_boot_option() - enumerate the possible bootable media
• • @opt: pointer to the media boot option structure
• • @volume_handles: pointer to the efi handles
• • @count: number of efi handle
• • Return: status code
• */

+static efi_status_t efi_bootmgr_enumerate_boot_option(struct eficonfig_media_boot_option *opt,

• 				      efi_handle_t *volume_handles,
  

• 				      efi_status_t count)
  

+{

• u32 i;
• struct efi_handler *handler;
• efi_status_t ret = EFI_SUCCESS;
• for (i = 0; i < count; i++) {

• u16 *p;
  

• u16 dev_name[BOOTMENU_DEVICE_NAME_MAX];
  

• char *optional_data;
  

• struct efi_load_option lo;
  

• char buf[BOOTMENU_DEVICE_NAME_MAX];
  

• struct efi_device_path *device_path;
  

• 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_disk_get_device_name(volume_handles[i], buf, BOOTMENU_DEVICE_NAME_MAX);
  

• if (ret != EFI_SUCCESS)
  

• 	continue;
  

• p = dev_name;
  

• utf8_utf16_strncpy(&p, buf, strlen(buf));
  

• lo.label = dev_name;
  

• lo.attributes = LOAD_OPTION_ACTIVE;
  

• lo.file_path = device_path;
  

• lo.file_path_length = efi_dp_size(device_path) + sizeof(END);
  

• /*
  

•  * Set the dedicated guid to optional_data, it is used to identify
  

•  * the boot option that automatically generated by the bootmenu.
  

•  * efi_serialize_load_option() expects optional_data is null-terminated
  

•  * utf8 string, so set the "1234567" string to allocate enough space
  

•  * to store guid, instead of realloc the load_option.
  

•  */
  

• lo.optional_data = "1234567";
  

• opt[i].size = efi_serialize_load_option(&lo, (u8 **)&opt[i].lo);
  

• if (!opt[i].size) {
  

• 	ret = EFI_OUT_OF_RESOURCES;
  

• 	goto out;
  

• }
  

• /* set the guid */
  

• optional_data = (char *)opt[i].lo + (opt[i].size - u16_strsize(u"1234567"));
  

• memcpy(optional_data, &efi_guid_bootmenu_auto_generated, sizeof(efi_guid_t));
  

• }

+out:

• return ret;

+}

+/**

• • efi_bootmgr_delete_invalid_boot_option() - delete non-existing boot option
• • @opt: pointer to the media boot option structure
• • @count: number of media boot option structure
• • Return: status code
• */

+static efi_status_t efi_bootmgr_delete_invalid_boot_option(struct eficonfig_media_boot_option *opt,

• 					   efi_status_t count)
  

+{

• efi_uintn_t size;
• void *load_option;
• u32 i, list_size = 0;
• struct efi_load_option lo;
• u16 *var_name16 = NULL;
• u16 varname[] = u"Boot####";
• efi_status_t ret = EFI_SUCCESS;
• u16 *delete_index_list = NULL, *p;
• efi_uintn_t buf_size;
• buf_size = 128;
• var_name16 = malloc(buf_size);
• if (!var_name16)

• return EFI_OUT_OF_RESOURCES;
  

• var_name16[0] = 0;
• for (;;) {

• int index;
  

• efi_guid_t guid;
  

• efi_uintn_t tmp;
  

• ret = efi_next_variable_name(&buf_size, &var_name16, &guid);
  

• if (ret == EFI_NOT_FOUND) {
  

• 	/*
  

• 	 * EFI_NOT_FOUND indicates we retrieved all EFI variables.
  

• 	 * This should be treated as success.
  

• 	 */
  

• 	ret = EFI_SUCCESS;
  

• 	break;
  

• }
  

• if (ret != EFI_SUCCESS)
  

• 	goto out;
  

• if (!efi_varname_is_load_option(var_name16, &index))
  

• 	continue;
  

• efi_create_indexed_name(varname, sizeof(varname), "Boot", index);
  

• load_option = efi_get_var(varname, &efi_global_variable_guid, &size);
  

• if (!load_option)
  

• 	continue;
  

• tmp = size;
  

• ret = efi_deserialize_load_option(&lo, load_option, &size);
  

• if (ret != EFI_SUCCESS)
  

• 	goto next;
  

• if (size >= sizeof(efi_guid_bootmenu_auto_generated) &&
  

•     !guidcmp(lo.optional_data, &efi_guid_bootmenu_auto_generated)) {
  

• 	for (i = 0; i < count; i++) {
  

• 		if (opt[i].size == tmp &&
  

• 		    memcmp(opt[i].lo, load_option, tmp) == 0) {
  

• 			opt[i].exist = true;
  

• 			break;
  

• 		}
  

• 	}
  

• 	/*
  

• 	 * The entire list of variables must be retrieved by
  

• 	 * efi_get_next_variable_name_int() before deleting the invalid
  

• 	 * boot option, just save the index here.
  

• 	 */
  

• 	if (i == count) {
  

• 		p = realloc(delete_index_list, sizeof(u32) *
  

• 			    (list_size + 1));
  

• 		if (!p) {
  

• 			ret = EFI_OUT_OF_RESOURCES;
  

• 			goto out;
  

• 		}
  

• 		delete_index_list = p;
  

• 		delete_index_list[list_size++] = index;
  

• 	}
  

• }
  

+next:

• free(load_option);
  

• }
• /* delete all invalid boot options */
• for (i = 0; i < list_size; i++) {

• ret = efi_bootmgr_delete_boot_option(delete_index_list[i]);
  

• if (ret != EFI_SUCCESS)
  

• 	goto out;
  

• }

+out:

• free(var_name16);
• free(delete_index_list);
• return ret;

+}

+/**

• • efi_bootmgr_get_unused_bootoption() - get unused "Boot####" index
• • @buf: pointer to the buffer to store boot option variable name
• • @buf_size: buffer size
• • @index: pointer to store the index in the BootOrder variable
• • Return: status code
• */

+efi_status_t efi_bootmgr_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;

+}

+/**

• • efi_bootmgr_append_bootorder() - append new boot option in BootOrder variable
• • @index: "Boot####" index to append to BootOrder variable
• • Return: status code
• */

+efi_status_t efi_bootmgr_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;

+}

+/**

• • efi_bootmgr_delete_boot_option() - delete selected boot option
• • @boot_index: boot option index to delete
• • Return: status code
• */

+efi_status_t efi_bootmgr_delete_boot_option(u16 boot_index) +{

• u16 *bootorder;
• u16 varname[9];
• efi_status_t ret;
• unsigned int index;
• efi_uintn_t num, size;
• efi_create_indexed_name(varname, sizeof(varname),

• 		"Boot", boot_index);
  

• ret = efi_set_variable_int(varname, &efi_global_variable_guid,

• 		   0, 0, NULL, false);
  

• if (ret != EFI_SUCCESS) {

• log_err("delete boot option(%ls) failed\n", varname);
  

• return ret;
  

• }
• /* update BootOrder if necessary */
• bootorder = efi_get_var(u"BootOrder", &efi_global_variable_guid, &size);
• if (!bootorder)

• return EFI_SUCCESS;
  

• num = size / sizeof(u16);
• if (!efi_search_bootorder(bootorder, num, boot_index, &index))

• return EFI_SUCCESS;
  

• memmove(&bootorder[index], &bootorder[index + 1],

• (num - index - 1) * sizeof(u16));
  

• size -= sizeof(u16);
• ret = efi_set_variable_int(u"BootOrder", &efi_global_variable_guid,

• 		   EFI_VARIABLE_NON_VOLATILE |
  

• 		   EFI_VARIABLE_BOOTSERVICE_ACCESS |
  

• 		   EFI_VARIABLE_RUNTIME_ACCESS,
  

• 		   size, bootorder, false);
  

• return ret;

+}

+/**

• • efi_bootmgr_update_media_device_boot_option() - generate the media device boot option
• • This function enumerates all devices supporting EFI_SIMPLE_FILE_SYSTEM_PROTOCOL
• • and generate the bootmenu entries.
• • This function also provide the BOOT#### variable maintenance for
• • the media device entries.
• • • Automatically create the BOOT#### variable for the newly detected device,
• • this BOOT#### variable is distinguished by the special GUID
• • stored in the EFI_LOAD_OPTION.optional_data
• • • If the device is not attached to the system, the associated BOOT#### variable
• • is automatically deleted.
• • Return: status code
• */

+efi_status_t efi_bootmgr_update_media_device_boot_option(void) +{

• u32 i;
• efi_status_t ret;
• efi_uintn_t count;
• efi_handle_t *volume_handles = NULL;
• struct eficonfig_media_boot_option *opt = NULL;
• 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)

• return ret;
  

• opt = calloc(count, sizeof(struct eficonfig_media_boot_option));
• if (!opt)

• goto out;
  

• /* enumerate all devices supporting EFI_SIMPLE_FILE_SYSTEM_PROTOCOL */
• ret = efi_bootmgr_enumerate_boot_option(opt, volume_handles, count);
• if (ret != EFI_SUCCESS)

• goto out;
  

• /*

• * System hardware configuration may vary depending on the user setup.
  

• * The boot option is automatically added by the bootmenu.
  

• * If the device is not attached to the system, the boot option needs
  

• * to be deleted.
  

• */
  

• ret = efi_bootmgr_delete_invalid_boot_option(opt, count);
• if (ret != EFI_SUCCESS)

• goto out;
  

• /* add non-existent boot option */
• for (i = 0; i < count; i++) {

• u32 boot_index;
  

• u16 var_name[9];
  

• if (!opt[i].exist) {
  

• 	ret = efi_bootmgr_get_unused_bootoption(var_name, sizeof(var_name),
  

• 						&boot_index);
  

• 	if (ret != EFI_SUCCESS)
  

• 		goto out;
  

• 	ret = efi_set_variable_int(var_name, &efi_global_variable_guid,
  

• 				   EFI_VARIABLE_NON_VOLATILE |
  

• 				   EFI_VARIABLE_BOOTSERVICE_ACCESS |
  

• 				   EFI_VARIABLE_RUNTIME_ACCESS,
  

• 				   opt[i].size, opt[i].lo, false);
  

• 	if (ret != EFI_SUCCESS)
  

• 		goto out;
  

• 	ret = efi_bootmgr_append_bootorder(boot_index);
  

• 	if (ret != EFI_SUCCESS) {
  

• 		efi_set_variable_int(var_name, &efi_global_variable_guid,
  

• 				     0, 0, NULL, false);
  

• 		goto out;
  

• 	}
  

• }
  

• }

+out:

• if (opt) {

• for (i = 0; i < count; i++)
  

• 	free(opt[i].lo);
  

• }
• free(opt);
• efi_free_pool(volume_handles);
• return ret;

+} diff --git a/lib/efi_loader/efi_helper.c b/lib/efi_loader/efi_helper.c index 1f4ab2b419..cdfd16ea77 100644 --- a/lib/efi_loader/efi_helper.c +++ b/lib/efi_loader/efi_helper.c @@ -257,3 +257,28 @@ efi_status_t efi_next_variable_name(efi_uintn_t *size, u16 **buf, efi_guid_t *gu

return ret; }

+/**

• • efi_search_bootorder() - search the boot option index in BootOrder
• • @bootorder: pointer to the BootOrder variable
• • @num: number of BootOrder entry
• • @target: target boot option index to search
• • @index: pointer to store the index of BootOrder variable
• • Return: true if exists, false otherwise
• */

+bool efi_search_bootorder(u16 *bootorder, efi_uintn_t num, u32 target, u32 *index) +{

• u32 i;
• for (i = 0; i < num; i++) {

• if (target == bootorder[i]) {
  

• 	if (index)
  

• 		*index = i;
  

• 	return true;
  

• }
  

• }
• return false;

+}

2.25.1

One nitpick when moving around efi_bootmgr_get_unused_bootoption(). The unused boot option number has nothing to do with the boot manager. I think moving it to lib/efi_loader/efi_helper.c is a better option. In any case we can do it in a future patch since this one is moves code around from eficonfig to the efibootmgr.

Reviewed-by: Ilias Apalodimas ilias.apalodimas@linaro.org