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efi_loader: implement EFI_FILE_SYSTEM_INFO

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Implement the information type EFI_FILE_SYSTEM_INFO in the service
GetInfo() of the EFI_FILE_PROTOCOL.

The volume label is not available in U-Boot. As a work-around use the
partition name instead.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2018-04-04 15:42:11 +02:00 • committed by Alexander Graf
parent c412166de2
commit 9e6835e6ba
3 changed files with 53 additions and 0 deletions
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38
lib/efi_loader/efi_file.c
View file

@ -12,6 +12,9 @@
#include <malloc.h>
#include <fs.h>
/* GUID for file system information */
const efi_guid_t efi_file_system_info_guid = EFI_FILE_SYSTEM_INFO_GUID;
struct file_system {
struct efi_simple_file_system_protocol base;
struct efi_device_path *dp;
@ -472,6 +475,41 @@ static efi_status_t EFIAPI efi_file_getinfo(struct efi_file_handle *file,
info->attribute |= EFI_FILE_DIRECTORY;
ascii2unicode((u16 *)info->file_name, filename);
} else if (!guidcmp(info_type, &efi_file_system_info_guid)) {
struct efi_file_system_info *info = buffer;
disk_partition_t part;
efi_uintn_t required_size;
int r;
if (fh->fs->part >= 1)
r = part_get_info(fh->fs->desc, fh->fs->part, &part);
else
r = part_get_info_whole_disk(fh->fs->desc, &part);
if (r < 0) {
ret = EFI_DEVICE_ERROR;
goto error;
}
required_size = sizeof(info) + 2 *
(strlen((const char *)part.name) + 1);
if (*buffer_size < required_size) {
*buffer_size = required_size;
ret = EFI_BUFFER_TOO_SMALL;
goto error;
}
memset(info, 0, required_size);
info->size = required_size;
info->read_only = true;
info->volume_size = part.size * part.blksz;
info->free_space = 0;
info->block_size = part.blksz;
/*
* TODO: The volume label is not available in U-Boot.
* Use the partition name as substitute.
*/
ascii2unicode((u16 *)info->volume_label,
(const char *)part.name);
} else {
ret = EFI_UNSUPPORTED;
}