static efi_status_t EFIAPI efi_file_write(struct efi_file_handle *file,
efi_uintn_t *buffer_size,
void *buffer)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
loff_t actwrite;
EFI_ENTRY("%p, %p, %p", file, buffer_size, buffer);
if (set_blk_dev(fh)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
if (fs_write(fh->path, (ulong)buffer, fh->offset, *buffer_size,
&actwrite)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
*buffer_size = actwrite;
fh->offset += actwrite;
error:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_delete(struct efi_file_handle *file)
{
struct file_handle *fh = to_fh(file);
EFI_ENTRY("%p", file);
file_close(fh);
return EFI_EXIT(EFI_WARN_DELETE_FAILURE);
}
static efi_status_t EFIAPI efi_file_read(struct efi_file_handle *file,
efi_uintn_t *buffer_size, void *buffer)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
u64 bs;
EFI_ENTRY("%p, %p, %p", file, buffer_size, buffer);
if (!buffer_size || !buffer) {
ret = EFI_INVALID_PARAMETER;
goto error;
}
if (set_blk_dev(fh)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
bs = *buffer_size;
if (fh->isdir)
ret = dir_read(fh, &bs, buffer);
else
ret = file_read(fh, &bs, buffer);
if (bs <= SIZE_MAX)
*buffer_size = bs;
else
*buffer_size = SIZE_MAX;
error:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_getpos(struct efi_file_handle *file,
efi_uintn_t *pos)
{
struct file_handle *fh = to_fh(file);
EFI_ENTRY("%p, %p", file, pos);
if (fh->offset <= SIZE_MAX) {
*pos = fh->offset;
return EFI_EXIT(EFI_SUCCESS);
} else {
return EFI_EXIT(EFI_DEVICE_ERROR);
}
}
static efi_status_t EFIAPI efi_file_open(struct efi_file_handle *file,
struct efi_file_handle **new_handle,
s16 *file_name, u64 open_mode, u64 attributes)
{
struct file_handle *fh = to_fh(file);
EFI_ENTRY("%p, %p, \"%ls\", %llx, %llu", file, new_handle, file_name,
open_mode, attributes);
*new_handle = file_open(fh->fs, fh, file_name, open_mode);
if (!*new_handle)
return EFI_EXIT(EFI_NOT_FOUND);
return EFI_EXIT(EFI_SUCCESS);
}
/**
* efi_file_getpos() - get current position in file
*
* This function implements the GetPosition service of the EFI file protocol.
* See the UEFI spec for details.
*
* @file: file handle
* @pos: pointer to file position
* Return: status code
*/
static efi_status_t EFIAPI efi_file_getpos(struct efi_file_handle *file,
u64 *pos)
{
efi_status_t ret = EFI_SUCCESS;
struct file_handle *fh = to_fh(file);
EFI_ENTRY("%p, %p", file, pos);
if (fh->isdir) {
ret = EFI_UNSUPPORTED;
goto out;
}
*pos = fh->offset;
out:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_open(struct efi_file_handle *file,
struct efi_file_handle **new_handle,
u16 *file_name, u64 open_mode, u64 attributes)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret;
EFI_ENTRY("%p, %p, \"%ls\", %llx, %llu", file, new_handle,
(wchar_t *)file_name, open_mode, attributes);
/* Check parameters */
if (!file || !new_handle || !file_name) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
if (open_mode != EFI_FILE_MODE_READ &&
open_mode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE) &&
open_mode != (EFI_FILE_MODE_READ | EFI_FILE_MODE_WRITE |
EFI_FILE_MODE_CREATE)) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
/*
* The UEFI spec requires that attributes are only set in create mode.
* The SCT does not care about this and sets EFI_FILE_DIRECTORY in
* read mode. EDK2 does not check that attributes are zero if not in
* create mode.
*
* So here we only check attributes in create mode and do not check
* that they are zero otherwise.
*/
if ((open_mode & EFI_FILE_MODE_CREATE) &&
(attributes & (EFI_FILE_READ_ONLY | ~EFI_FILE_VALID_ATTR))) {
ret = EFI_INVALID_PARAMETER;
goto out;
}
/* Open file */
*new_handle = file_open(fh->fs, fh, file_name, open_mode, attributes);
if (*new_handle)
ret = EFI_SUCCESS;
else
ret = EFI_NOT_FOUND;
out:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_delete(struct efi_file_handle *file)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p", file);
if (set_blk_dev(fh)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
if (fs_unlink(fh->path))
ret = EFI_DEVICE_ERROR;
file_close(fh);
error:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_setpos(struct efi_file_handle *file,
efi_uintn_t pos)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p, %zu", file, pos);
if (fh->isdir) {
if (pos != 0) {
ret = EFI_UNSUPPORTED;
goto error;
}
fs_closedir(fh->dirs);
fh->dirs = NULL;
}
if (pos == ~0ULL) {
loff_t file_size;
if (set_blk_dev(fh)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
if (fs_size(fh->path, &file_size)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
pos = file_size;
}
fh->offset = pos;
error:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_getinfo(struct efi_file_handle *file,
const efi_guid_t *info_type,
efi_uintn_t *buffer_size,
void *buffer)
{
struct file_handle *fh = to_fh(file);
efi_status_t ret = EFI_SUCCESS;
EFI_ENTRY("%p, %p, %p, %p", file, info_type, buffer_size, buffer);
if (!guidcmp(info_type, &efi_file_info_guid)) {
struct efi_file_info *info = buffer;
char *filename = basename(fh);
unsigned int required_size;
loff_t file_size;
/* check buffer size: */
required_size = sizeof(*info) + 2 * (strlen(filename) + 1);
if (*buffer_size < required_size) {
*buffer_size = required_size;
ret = EFI_BUFFER_TOO_SMALL;
goto error;
}
if (set_blk_dev(fh)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
if (fs_size(fh->path, &file_size)) {
ret = EFI_DEVICE_ERROR;
goto error;
}
memset(info, 0, required_size);
info->size = required_size;
info->file_size = file_size;
info->physical_size = file_size;
if (fh->isdir)
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;
}
error:
return EFI_EXIT(ret);
}
static efi_status_t EFIAPI efi_file_close(struct efi_file_handle *file)
{
struct file_handle *fh = to_fh(file);
EFI_ENTRY("%p", file);
return EFI_EXIT(file_close(fh));
}