Just "packed" doesn't always pack the way we expect.

* include/grub/fs.h (grub_fs_dir_hook_t): New type.
(struct grub_fs.dir): Add hook_data argument.

Update all implementations and callers.

	* grub-core/fs/squash4.c (grub_fshelp_node): New field stsize.
	Make inode numbers into stack.
	(grub_squash_read_symlink): Use stack.
	(grub_squash_iterate_dir): Use stack. Create "." and ".." nodes.
	(make_root_node): Fill stack.
	(grub_squash_open): Use stack.

	(grub_squash_read_data): Fix offset byte-swapping.

	Allocate at lest 8192 for temporary buffer as required for lzo.

	Fix source dir check.

	avoid shadowing.

	(direct_read): Use correct compressed size.
	(grub_squash_read_data): Likewise.

	case statements as compile-time one.
	(direct_read): Prevent spurious warnings.
	(grub_squash_read_data): Likewise.

	* Makefile.util.def (libgrubmods.a): Add xzembed directory to cppflags.
	Add xzembed source files.
	* grub-core/Makefile.core.def (squash4): Add xzembed and minilzo flags.
	* grub-core/fs/squash4.c (grub_squash_super): New field compression.
	(grub_squash_inode): New subtype long_dir.
	(SQUASH_TYPE_LONG_DIR): New inode type.
	(COMPRESSION): New enum.
	(XZBUFSIZ): New const.
	(grub_squash_data): New fields blksz, decompress, xzdec, xzbuf.
	(read_chunk): Use data->decompress.
	(zlib_decompress): New function.
	(lzo_decompress): Likewise.
	(xz_decompress): Likewise.
	(squash_mount): Set new data fields.
	(grub_squash_iterate_dir): Handle long dir.
	(squash_unmount): Free xzdec and xzbuf.
	(grub_squash_open): Check ino type.
	(direct_read): Stylistic fixes. Use data->decompress.
	(grub_squash_read_data): Likewise.
	* grub-core/io/gzio.c (grub_gzio): Remove disk_input.
	(get_byte): Likewise.
	(grub_zlib_disk_read): Removed.
	* grub-core/lib/posix_wrap/sys/types.h (ssize_t): New type.
	(GRUB_POSIX_BOOL_DEFINED): New define.
	* grub-core/lib/posix_wrap/unistd.h: Include sys/types.h.
	* grub-core/lib/xzembed/xz.h: Addmissing includes.
	[!GRUB_POSIX_BOOL_DEFINED]: Define bool.
	* include/grub/deflate.h (grub_zlib_disk_read): Removed.

	(grub_squash_dirent_header): Likewise.
	(read_chunk): Don't double swap.
	(grub_squash_iterate_dir): Fix swap sizes.

	* grub-core/fs/btrfs.c (grub_btrfs_dir): Fix memory leak.
	* grub-core/fs/cpio.c (grub_cpio_find_file): Likewise.
	(grub_cpio_dir): Likewise.
	* grub-core/fs/fat.c (grub_fat_label): Likewise.
	* grub-core/fs/jfs.c (grub_jfs_label): Likewise.
	* grub-core/fs/romfs.c (grub_romfs_close): Likewise.
	(grub_romfs_label): Likewise.
	* grub-core/fs/squash4.c (squash_mount): Use zalloc for safety.
	(squash_unmount): New function.
	(grub_squash_dir): Fix memory leak.
	(grub_squash_open): Likewise.
	(grub_squash_read): Likewise.
	(grub_squash_mtime): Likewise.
	* grub-core/fs/xfs.c (grub_xfs_open): Likewise.
	* grub-core/fs/zfs/zfs.c (check_pool_label): Likewise.
	* util/grub-fstest.c (fstest): Likewise.

	* grub-core/fs/squash4.c (grub_squash_data): New field log2_blksz.
	(squash_mount): Check block size and take logarithm.
	(direct_read): Use shifts.

	* grub-core/fs/squash4.c (grub_squash_super): Add block_size. Remove
	unused flags.
	(grub_squash_inode): Add long_file and block_size.
	(grub_squash_cache_inode): New struct.
	(grub_squash_dirent): Make types into enum.
	(SQUASH_TYPE_LONG_REGULAR): New type.
	(grub_squash_frag_desc): Add field size.
	(SQUASH_BLOCK_FLAGS): New enum.
	(grub_squash_data): Use grub_squash_cache_inode.
	(grub_fshelp_node): Make ino_chunk 64-bit.
	(read_chunk): Minor argument change. All users updated.
	(squash_mount): Use correct le_to_cpu.
	(grub_squash_open): Handle LONG_REGULAR.
	(direct_read): New function.
	(grub_squash_read_data): Handle blocks correctly.