Changes for complying to EFI spec §3.5.1.1 'Removable Media Boot Behavior'. Boot variables can be automatically generated during a removable media is probed. At the same time, unused boot variables will be detected and removed. Related APIs are renamed and moved from cmd to lib for re-use between eficonfig and bootmgr.

Signed-off-by: Raymond Mao raymond.mao@linaro.org --- cmd/bootmenu.c | 2 +- cmd/eficonfig.c | 408 +----------------------------- include/efi_config.h | 5 - include/efi_loader.h | 11 + lib/efi_loader/efi_bootmgr.c | 380 ++++++++++++++++++++++++++++ lib/efi_loader/efi_disk.c | 7 + lib/efi_loader/efi_helper.c | 25 ++ lib/efi_loader/efi_variable.c | 6 +- lib/efi_loader/efi_variable_tee.c | 3 +- 9 files changed, 437 insertions(+), 410 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..c329428973 100644 --- a/lib/efi_loader/efi_bootmgr.c +++ b/lib/efi_loader/efi_bootmgr.c @@ -347,3 +347,383 @@ 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) { + log_debug("last efi var\n"); + /* + * 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) { + log_debug("found index %d can be deleted\n", index); + 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++) { + log_debug("deleting index %d\n", delete_index_list[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++) { + if (opt[i].lo) + free(opt[i].lo); + } + free(opt); + } + efi_free_pool(volume_handles); + + return ret; +} diff --git a/lib/efi_loader/efi_disk.c b/lib/efi_loader/efi_disk.c index d2256713a8..1309e28134 100644 --- a/lib/efi_loader/efi_disk.c +++ b/lib/efi_loader/efi_disk.c @@ -687,6 +687,13 @@ int efi_disk_probe(void *ctx, struct event *event) return -1; }

+ /* only do the boot option management when UEFI sub-system is initialized */ + if (efi_obj_list_initialized == EFI_SUCCESS) { + ret = efi_bootmgr_update_media_device_boot_option(); + if (ret) + return -1; + } + return 0; }

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; +} diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c index be95ed44e6..2f251553e1 100644 --- a/lib/efi_loader/efi_variable.c +++ b/lib/efi_loader/efi_variable.c @@ -476,6 +476,10 @@ efi_status_t efi_init_variables(void) log_err("Invalid EFI variable seed\n"); }

+ ret = efi_init_secure_state(); + if (ret != EFI_SUCCESS) + return ret;

- return efi_init_secure_state(); + /* update boot option management after variable service initialized */ + return efi_bootmgr_update_media_device_boot_option(); } diff --git a/lib/efi_loader/efi_variable_tee.c b/lib/efi_loader/efi_variable_tee.c index dfef18435d..a48d313ef0 100644 --- a/lib/efi_loader/efi_variable_tee.c +++ b/lib/efi_loader/efi_variable_tee.c @@ -748,5 +748,6 @@ efi_status_t efi_init_variables(void) if (ret != EFI_SUCCESS) return ret;

- return EFI_SUCCESS; + /* update boot option management after variable service initialized */ + return efi_bootmgr_update_media_device_boot_option(); }