Esempio n. 1
0
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);
}
Esempio n. 2
0
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);
}
Esempio n. 3
0
/* NOTE: despite what you would expect, 'file_name' is actually a path.
 * With windoze style backlashes, ofc.
 */
static struct efi_file_handle *file_open(struct file_system *fs,
		struct file_handle *parent, s16 *file_name, u64 mode)
{
	struct file_handle *fh;
	char f0[MAX_UTF8_PER_UTF16] = {0};
	int plen = 0;
	int flen = 0;

	if (file_name) {
		utf16_to_utf8((u8 *)f0, (u16 *)file_name, 1);
		flen = utf16_strlen((u16 *)file_name);
	}

	/* we could have a parent, but also an absolute path: */
	if (f0[0] == '\\') {
		plen = 0;
	} else if (parent) {
		plen = strlen(parent->path) + 1;
	}

	/* +2 is for null and '/' */
	fh = calloc(1, sizeof(*fh) + plen + (flen * MAX_UTF8_PER_UTF16) + 2);

	fh->base = efi_file_handle_protocol;
	fh->fs = fs;

	if (parent) {
		char *p = fh->path;

		if (plen > 0) {
			strcpy(p, parent->path);
			p += plen - 1;
			*p++ = '/';
		}

		utf16_to_utf8((u8 *)p, (u16 *)file_name, flen);

		if (sanitize_path(fh->path))
			goto error;

		/* check if file exists: */
		if (set_blk_dev(fh))
			goto error;

		if (!((mode & EFI_FILE_MODE_CREATE) || fs_exists(fh->path)))
			goto error;

		/* figure out if file is a directory: */
		fh->isdir = is_dir(fh);
	} else {
		fh->isdir = 1;
		strcpy(fh->path, "");
	}

	return &fh->base;

error:
	free(fh);
	return NULL;
}
Esempio n. 4
0
static int is_dir(struct file_handle *fh)
{
	struct fs_dir_stream *dirs;

	set_blk_dev(fh);
	dirs = fs_opendir(fh->path);
	if (!dirs)
		return 0;

	fs_closedir(dirs);

	return 1;
}
Esempio n. 5
0
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);
}
Esempio n. 6
0
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);
}
Esempio n. 7
0
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);
}