efi_loader: capsule: add capsule_on_disk support
Capsule data can be loaded into the system either via UpdateCapsule runtime service or files on a file system (of boot device). The latter case is called "capsules on disk", and actual updates will take place at the next boot time. In this commit, we will support capsule on disk mechanism. Please note that U-Boot itself has no notion of "boot device" and all the capsule files to be executed will be detected only if they are located in a specific directory, \EFI\UpdateCapsule, on a device that is identified as a boot device by "BootXXXX" variables. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
This commit is contained in:
AKASHI Takahiro
Heinrich Schuchardt
parent
2bc27ca8a0
commit
c74cd8bd08
@ -16,6 +16,7 @@
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#include <init.h>
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#include <net.h>
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#include <version.h>
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#include <efi_loader.h>
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static void run_preboot_environment_command(void)
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{
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@ -53,6 +54,9 @@ void main_loop(void)
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if (IS_ENABLED(CONFIG_UPDATE_TFTP))
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update_tftp(0UL, NULL, NULL);
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if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK_EARLY))
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efi_launch_capsules();
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s = bootdelay_process();
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if (cli_process_fdt(&s))
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cli_secure_boot_cmd(s);
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@ -825,6 +825,11 @@ efi_status_t EFIAPI efi_query_capsule_caps(
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u64 *maximum_capsule_size,
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u32 *reset_type);
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#define EFI_CAPSULE_DIR L"\\EFI\\UpdateCapsule\\"
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/* Hook at initialization */
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efi_status_t efi_launch_capsules(void);
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#else /* CONFIG_IS_ENABLED(EFI_LOADER) */
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/* Without CONFIG_EFI_LOADER we don't have a runtime section, stub it out */
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@ -841,6 +846,10 @@ static inline void efi_set_bootdev(const char *dev, const char *devnr,
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const char *path) { }
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static inline void efi_net_set_dhcp_ack(void *pkt, int len) { }
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static inline void efi_print_image_infos(void *pc) { }
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static inline efi_status_t efi_launch_capsules(void)
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{
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return EFI_SUCCESS;
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}
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#endif /* CONFIG_IS_ENABLED(EFI_LOADER) */
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@ -105,6 +105,28 @@ config EFI_RUNTIME_UPDATE_CAPSULE
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Select this option if you want to use UpdateCapsule and
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QueryCapsuleCapabilities API's.
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config EFI_CAPSULE_ON_DISK
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bool "Enable capsule-on-disk support"
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select EFI_HAVE_CAPSULE_SUPPORT
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default n
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help
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Select this option if you want to use capsule-on-disk feature,
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that is, capsules can be fetched and executed from files
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under a specific directory on UEFI system partition instead of
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via UpdateCapsule API.
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config EFI_CAPSULE_ON_DISK_EARLY
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bool "Initiate capsule-on-disk at U-Boot boottime"
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depends on EFI_CAPSULE_ON_DISK
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default n
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select EFI_SETUP_EARLY
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help
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Normally, without this option enabled, capsules will be
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executed only at the first time of invoking one of efi command.
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If this option is enabled, capsules will be enforced to be
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executed as part of U-Boot initialisation so that they will
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surely take place whatever is set to distro_bootcmd.
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config EFI_DEVICE_PATH_TO_TEXT
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bool "Device path to text protocol"
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default y
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@ -11,10 +11,16 @@
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#include <efi_variable.h>
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#include <fs.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <sort.h>
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const efi_guid_t efi_guid_capsule_report = EFI_CAPSULE_REPORT_GUID;
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#ifdef CONFIG_EFI_CAPSULE_ON_DISK
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/* for file system access */
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static struct efi_file_handle *bootdev_root;
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#endif
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/**
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* get_last_capsule - get the last capsule index
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*
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@ -163,3 +169,495 @@ efi_status_t EFIAPI efi_query_capsule_caps(
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out:
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return EFI_EXIT(ret);
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}
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#ifdef CONFIG_EFI_CAPSULE_ON_DISK
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/**
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* get_dp_device - retrieve a device path from boot variable
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* @boot_var: Boot variable name
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* @device_dp Device path
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*
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* Retrieve a device patch from boot variable, @boot_var.
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*
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* Return: status code
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*/
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static efi_status_t get_dp_device(u16 *boot_var,
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struct efi_device_path **device_dp)
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{
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void *buf = NULL;
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efi_uintn_t size;
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struct efi_load_option lo;
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struct efi_device_path *file_dp;
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efi_status_t ret;
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size = 0;
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ret = efi_get_variable_int(boot_var, &efi_global_variable_guid,
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NULL, &size, NULL, NULL);
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if (ret == EFI_BUFFER_TOO_SMALL) {
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buf = malloc(size);
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if (!buf)
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return EFI_OUT_OF_RESOURCES;
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ret = efi_get_variable_int(boot_var, &efi_global_variable_guid,
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NULL, &size, buf, NULL);
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}
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if (ret != EFI_SUCCESS)
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return ret;
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efi_deserialize_load_option(&lo, buf, &size);
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if (lo.attributes & LOAD_OPTION_ACTIVE) {
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efi_dp_split_file_path(lo.file_path, device_dp, &file_dp);
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efi_free_pool(file_dp);
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ret = EFI_SUCCESS;
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} else {
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ret = EFI_NOT_FOUND;
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}
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free(buf);
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return ret;
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}
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/**
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* device_is_present_and_system_part - check if a device exists
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* @dp Device path
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*
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* Check if a device pointed to by the device path, @dp, exists and is
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* located in UEFI system partition.
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*
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* Return: true - yes, false - no
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*/
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static bool device_is_present_and_system_part(struct efi_device_path *dp)
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{
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efi_handle_t handle;
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handle = efi_dp_find_obj(dp, NULL);
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if (!handle)
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return false;
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return efi_disk_is_system_part(handle);
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}
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/**
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* find_boot_device - identify the boot device
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*
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* Identify the boot device from boot-related variables as UEFI
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* specification describes and put its handle into bootdev_root.
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*
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* Return: status code
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*/
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static efi_status_t find_boot_device(void)
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{
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char boot_var[9];
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u16 boot_var16[9], *p, bootnext, *boot_order = NULL;
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efi_uintn_t size;
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int i, num;
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struct efi_simple_file_system_protocol *volume;
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struct efi_device_path *boot_dev = NULL;
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efi_status_t ret;
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/* find active boot device in BootNext */
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bootnext = 0;
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size = sizeof(bootnext);
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ret = efi_get_variable_int(L"BootNext",
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(efi_guid_t *)&efi_global_variable_guid,
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NULL, &size, &bootnext, NULL);
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if (ret == EFI_SUCCESS || ret == EFI_BUFFER_TOO_SMALL) {
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/* BootNext does exist here */
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if (ret == EFI_BUFFER_TOO_SMALL || size != sizeof(u16)) {
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printf("BootNext must be 16-bit integer\n");
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goto skip;
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}
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sprintf((char *)boot_var, "Boot%04X", bootnext);
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p = boot_var16;
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utf8_utf16_strcpy(&p, boot_var);
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ret = get_dp_device(boot_var16, &boot_dev);
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if (ret == EFI_SUCCESS) {
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if (device_is_present_and_system_part(boot_dev)) {
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goto out;
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} else {
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efi_free_pool(boot_dev);
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boot_dev = NULL;
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}
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}
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}
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skip:
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/* find active boot device in BootOrder */
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size = 0;
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ret = efi_get_variable_int(L"BootOrder", &efi_global_variable_guid,
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NULL, &size, NULL, NULL);
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if (ret == EFI_BUFFER_TOO_SMALL) {
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boot_order = malloc(size);
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if (!boot_order) {
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ret = EFI_OUT_OF_RESOURCES;
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goto out;
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}
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ret = efi_get_variable_int(L"BootOrder",
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&efi_global_variable_guid,
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NULL, &size, boot_order, NULL);
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}
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if (ret != EFI_SUCCESS)
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goto out;
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/* check in higher order */
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num = size / sizeof(u16);
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for (i = 0; i < num; i++) {
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sprintf((char *)boot_var, "Boot%04X", boot_order[i]);
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p = boot_var16;
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utf8_utf16_strcpy(&p, boot_var);
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ret = get_dp_device(boot_var16, &boot_dev);
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if (ret != EFI_SUCCESS)
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continue;
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if (device_is_present_and_system_part(boot_dev))
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break;
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efi_free_pool(boot_dev);
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boot_dev = NULL;
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}
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out:
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if (boot_dev) {
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u16 *path_str;
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path_str = efi_dp_str(boot_dev);
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EFI_PRINT("EFI Capsule: bootdev is %ls\n", path_str);
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efi_free_pool(path_str);
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volume = efi_fs_from_path(boot_dev);
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if (!volume)
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ret = EFI_DEVICE_ERROR;
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else
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ret = EFI_CALL(volume->open_volume(volume,
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&bootdev_root));
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efi_free_pool(boot_dev);
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} else {
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ret = EFI_NOT_FOUND;
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}
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free(boot_order);
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return ret;
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}
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/**
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* efi_capsule_scan_dir - traverse a capsule directory in boot device
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* @files: Array of file names
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* @num: Number of elements in @files
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*
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* Traverse a capsule directory in boot device.
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* Called by initialization code, and returns an array of capsule file
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* names in @files.
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*
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* Return: status code
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*/
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static efi_status_t efi_capsule_scan_dir(u16 ***files, unsigned int *num)
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{
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struct efi_file_handle *dirh;
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struct efi_file_info *dirent;
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efi_uintn_t dirent_size, tmp_size;
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unsigned int count;
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u16 **tmp_files;
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efi_status_t ret;
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ret = find_boot_device();
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if (ret == EFI_NOT_FOUND) {
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EFI_PRINT("EFI Capsule: bootdev is not set\n");
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*num = 0;
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return EFI_SUCCESS;
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} else if (ret != EFI_SUCCESS) {
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return EFI_DEVICE_ERROR;
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}
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/* count capsule files */
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ret = EFI_CALL((*bootdev_root->open)(bootdev_root, &dirh,
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EFI_CAPSULE_DIR,
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EFI_FILE_MODE_READ, 0));
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if (ret != EFI_SUCCESS) {
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*num = 0;
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return EFI_SUCCESS;
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}
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dirent_size = 256;
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dirent = malloc(dirent_size);
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if (!dirent)
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return EFI_OUT_OF_RESOURCES;
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count = 0;
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while (1) {
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tmp_size = dirent_size;
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ret = EFI_CALL((*dirh->read)(dirh, &tmp_size, dirent));
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if (ret == EFI_BUFFER_TOO_SMALL) {
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dirent = realloc(dirent, tmp_size);
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if (!dirent) {
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ret = EFI_OUT_OF_RESOURCES;
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goto err;
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}
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dirent_size = tmp_size;
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ret = EFI_CALL((*dirh->read)(dirh, &tmp_size, dirent));
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}
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if (ret != EFI_SUCCESS)
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goto err;
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if (!tmp_size)
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break;
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if (!(dirent->attribute & EFI_FILE_DIRECTORY) &&
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u16_strcmp(dirent->file_name, L".") &&
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u16_strcmp(dirent->file_name, L".."))
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count++;
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}
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ret = EFI_CALL((*dirh->setpos)(dirh, 0));
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if (ret != EFI_SUCCESS)
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goto err;
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/* make a list */
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tmp_files = malloc(count * sizeof(*files));
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if (!tmp_files) {
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ret = EFI_OUT_OF_RESOURCES;
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goto err;
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}
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count = 0;
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while (1) {
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tmp_size = dirent_size;
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ret = EFI_CALL((*dirh->read)(dirh, &tmp_size, dirent));
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if (ret != EFI_SUCCESS)
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goto err;
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if (!tmp_size)
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break;
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if (!(dirent->attribute & EFI_FILE_DIRECTORY) &&
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u16_strcmp(dirent->file_name, L".") &&
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u16_strcmp(dirent->file_name, L".."))
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tmp_files[count++] = u16_strdup(dirent->file_name);
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}
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/* ignore an error */
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EFI_CALL((*dirh->close)(dirh));
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/* in ascii order */
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/* FIXME: u16 version of strcasecmp */
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qsort(tmp_files, count, sizeof(*tmp_files),
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(int (*)(const void *, const void *))strcasecmp);
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*files = tmp_files;
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*num = count;
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ret = EFI_SUCCESS;
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err:
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free(dirent);
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return ret;
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}
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/**
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* efi_capsule_read_file - read in a capsule file
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* @filename: File name
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* @capsule: Pointer to buffer for capsule
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*
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* Read a capsule file and put its content in @capsule.
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*
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* Return: status code
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*/
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static efi_status_t efi_capsule_read_file(const u16 *filename,
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struct efi_capsule_header **capsule)
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{
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struct efi_file_handle *dirh, *fh;
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struct efi_file_info *file_info = NULL;
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struct efi_capsule_header *buf = NULL;
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efi_uintn_t size;
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efi_status_t ret;
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ret = EFI_CALL((*bootdev_root->open)(bootdev_root, &dirh,
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EFI_CAPSULE_DIR,
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EFI_FILE_MODE_READ, 0));
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if (ret != EFI_SUCCESS)
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return ret;
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ret = EFI_CALL((*dirh->open)(dirh, &fh, (u16 *)filename,
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EFI_FILE_MODE_READ, 0));
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/* ignore an error */
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EFI_CALL((*dirh->close)(dirh));
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if (ret != EFI_SUCCESS)
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return ret;
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/* file size */
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size = 0;
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ret = EFI_CALL((*fh->getinfo)(fh, &efi_file_info_guid,
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&size, file_info));
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if (ret == EFI_BUFFER_TOO_SMALL) {
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file_info = malloc(size);
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if (!file_info) {
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ret = EFI_OUT_OF_RESOURCES;
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goto err;
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}
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ret = EFI_CALL((*fh->getinfo)(fh, &efi_file_info_guid,
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&size, file_info));
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}
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if (ret != EFI_SUCCESS)
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goto err;
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size = file_info->file_size;
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free(file_info);
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buf = malloc(size);
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if (!buf) {
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ret = EFI_OUT_OF_RESOURCES;
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goto err;
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}
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/* fetch data */
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ret = EFI_CALL((*fh->read)(fh, &size, buf));
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if (ret == EFI_SUCCESS) {
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if (size >= buf->capsule_image_size) {
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*capsule = buf;
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} else {
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free(buf);
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ret = EFI_INVALID_PARAMETER;
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}
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} else {
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free(buf);
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}
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err:
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EFI_CALL((*fh->close)(fh));
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return ret;
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}
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/**
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* efi_capsule_delete_file - delete a capsule file
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* @filename: File name
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*
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* Delete a capsule file from capsule directory.
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*
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* Return: status code
|
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*/
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static efi_status_t efi_capsule_delete_file(const u16 *filename)
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{
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struct efi_file_handle *dirh, *fh;
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efi_status_t ret;
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|
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ret = EFI_CALL((*bootdev_root->open)(bootdev_root, &dirh,
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EFI_CAPSULE_DIR,
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EFI_FILE_MODE_READ, 0));
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if (ret != EFI_SUCCESS)
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return ret;
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ret = EFI_CALL((*dirh->open)(dirh, &fh, (u16 *)filename,
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EFI_FILE_MODE_READ, 0));
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/* ignore an error */
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EFI_CALL((*dirh->close)(dirh));
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|
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ret = EFI_CALL((*fh->delete)(fh));
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return ret;
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}
|
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/**
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* efi_capsule_scan_done - reset a scan help function
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*
|
||||
* Reset a scan help function
|
||||
*/
|
||||
static void efi_capsule_scan_done(void)
|
||||
{
|
||||
EFI_CALL((*bootdev_root->close)(bootdev_root));
|
||||
bootdev_root = NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* arch_efi_load_capsule_drivers - initialize capsule drivers
|
||||
*
|
||||
* Architecture or board specific initialization routine
|
||||
*
|
||||
* Return: status code
|
||||
*/
|
||||
efi_status_t __weak arch_efi_load_capsule_drivers(void)
|
||||
{
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
* efi_launch_capsule - launch capsules
|
||||
*
|
||||
* Launch all the capsules in system at boot time.
|
||||
* Called by efi init code
|
||||
*
|
||||
* Return: status codde
|
||||
*/
|
||||
efi_status_t efi_launch_capsules(void)
|
||||
{
|
||||
u64 os_indications;
|
||||
efi_uintn_t size;
|
||||
struct efi_capsule_header *capsule = NULL;
|
||||
u16 **files;
|
||||
unsigned int nfiles, index, i;
|
||||
u16 variable_name16[12];
|
||||
efi_status_t ret;
|
||||
|
||||
size = sizeof(os_indications);
|
||||
ret = efi_get_variable_int(L"OsIndications", &efi_global_variable_guid,
|
||||
NULL, &size, &os_indications, NULL);
|
||||
if (ret != EFI_SUCCESS ||
|
||||
!(os_indications
|
||||
& EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED))
|
||||
return EFI_SUCCESS;
|
||||
|
||||
index = get_last_capsule();
|
||||
|
||||
/* Load capsule drivers */
|
||||
ret = arch_efi_load_capsule_drivers();
|
||||
if (ret != EFI_SUCCESS)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* Find capsules on disk.
|
||||
* All the capsules are collected at the beginning because
|
||||
* capsule files will be removed instantly.
|
||||
*/
|
||||
nfiles = 0;
|
||||
files = NULL;
|
||||
ret = efi_capsule_scan_dir(&files, &nfiles);
|
||||
if (ret != EFI_SUCCESS)
|
||||
return ret;
|
||||
if (!nfiles)
|
||||
return EFI_SUCCESS;
|
||||
|
||||
/* Launch capsules */
|
||||
for (i = 0, ++index; i < nfiles; i++, index++) {
|
||||
EFI_PRINT("capsule from %ls ...\n", files[i]);
|
||||
if (index > 0xffff)
|
||||
index = 0;
|
||||
ret = efi_capsule_read_file(files[i], &capsule);
|
||||
if (ret == EFI_SUCCESS) {
|
||||
ret = EFI_CALL(efi_update_capsule(&capsule, 1, 0));
|
||||
if (ret != EFI_SUCCESS)
|
||||
printf("EFI Capsule update failed at %ls\n",
|
||||
files[i]);
|
||||
|
||||
free(capsule);
|
||||
} else {
|
||||
printf("EFI: reading capsule failed: %ls\n",
|
||||
files[i]);
|
||||
}
|
||||
/* create CapsuleXXXX */
|
||||
set_capsule_result(index, capsule, ret);
|
||||
|
||||
/* delete a capsule either in case of success or failure */
|
||||
ret = efi_capsule_delete_file(files[i]);
|
||||
if (ret != EFI_SUCCESS)
|
||||
printf("EFI: deleting a capsule file failed: %ls\n",
|
||||
files[i]);
|
||||
}
|
||||
efi_capsule_scan_done();
|
||||
|
||||
for (i = 0; i < nfiles; i++)
|
||||
free(files[i]);
|
||||
free(files);
|
||||
|
||||
/* CapsuleLast */
|
||||
efi_create_indexed_name(variable_name16, "Capsule", index - 1);
|
||||
efi_set_variable_int(L"CapsuleLast", &efi_guid_capsule_report,
|
||||
EFI_VARIABLE_READ_ONLY |
|
||||
EFI_VARIABLE_NON_VOLATILE |
|
||||
EFI_VARIABLE_BOOTSERVICE_ACCESS |
|
||||
EFI_VARIABLE_RUNTIME_ACCESS,
|
||||
22, variable_name16, false);
|
||||
|
||||
return ret;
|
||||
}
|
||||
#endif /* CONFIG_EFI_CAPSULE_ON_DISK */
|
||||
|
||||
@ -155,6 +155,10 @@ static efi_status_t efi_init_os_indications(void)
|
||||
os_indications_supported |=
|
||||
EFI_OS_INDICATIONS_CAPSULE_RESULT_VAR_SUPPORTED;
|
||||
|
||||
if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK))
|
||||
os_indications_supported |=
|
||||
EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED;
|
||||
|
||||
return efi_set_variable_int(L"OsIndicationsSupported",
|
||||
&efi_global_variable_guid,
|
||||
EFI_VARIABLE_BOOTSERVICE_ACCESS |
|
||||
@ -282,6 +286,10 @@ efi_status_t efi_init_obj_list(void)
|
||||
if (ret != EFI_SUCCESS)
|
||||
goto out;
|
||||
|
||||
/* Execute capsules after reboot */
|
||||
if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK) &&
|
||||
!IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK_EARLY))
|
||||
ret = efi_launch_capsules();
|
||||
out:
|
||||
efi_obj_list_initialized = ret;
|
||||
return ret;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user