[e2fsprogs] ext2_dir_entry To ext2_dir_entry_2 Casting

[Wade Cline <clinew@linux.vnet.ibm.com>]

Hello Theodore Ts'o,

Is there a function similar to ext2fs_dir_iterate2() that will call a hook
function on an ext2_dir_entry_2 structure and not an ext2_dir_entry
structure?

The reason I ask is because btrfs-convert currently tries to do a cast
between the two structures as such:

	static int dir_iterate_proc(..., struct ext2_dir_entry *old, ...)
	{
	...
		struct ext2_dir_entry_2 *dirent = (struct ext2_dir_entry_2 *)old;

which works fine on little-endian machines, but breaks on big-endian machines.

If there isn't, would you be interested in a patch that adds a function, say,
ext2_dir_entry_upgrade(struct ext2_dir_entry *old, struct ext2_dir_entry_2 *new)
that will convert one structure to the other and take into account the endianness
of the machine? This would be better than just ad-hoc fixing the code in btrfs.

Thank you,
Wade Cline