* include/grub/disk.h (grub_disk_read_hook_t): New type.
	(struct grub_disk): Add read_hook_data member.
	* include/grub/file.h (struct grub_file): Likewise.
	* include/grub/fshelp.h (grub_fshelp_read_file): Add read_hook_data
	argument.

	Update all callers.

* 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/ext2.c (grub_ext2_mount): Likewise.
	* grub-core/fs/hfs.c (grub_hfs_mount): Likewise.
	* grub-core/fs/hfsplus.c (grub_hfsplus_mount): Likewise.
	* grub-core/fs/jfs.c (grub_jfs_mount): Likewise.
	* grub-core/fs/minix.c (grub_minix_mount): Likewise.
	* grub-core/fs/ntfs.c (grub_ntfs_mount): Likewise.
	* grub-core/fs/romfs.c (grub_romfs_mount): Likewise.
	* grub-core/fs/xfs.c (grub_xfs_mount): Likewise.

	Fix source dir check.

	over the sector.

	overflow.

	name for checksum and fix allocation algorithm.

	* 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/romfs.c: Likewise.
	* grub-core/lib/ia64/setjmp.S: Likewise.
	* grub-core/loader/i386/pc/freedos.c: Likewise.
	* grub-core/loader/ia64/efi/linux.c: Likewise.
	* grub-core/video/colors.c: Likewise.
	* include/grub/dl.h (GRUB_MOD_DEP): New macro.