Remove inlines of large functions to decrease code size (saved 1543
bytes).
Signed-off-by: NJan Kara <jack@suse.cz>

Remove bogus typedef which is just a definition of char *.
Remove unnecessary type casts.
Substitute freedqbuf() with kfree.
Signed-off-by: NJan Kara <jack@suse.cz>

Quota subsystem has more and more files. It's time to create a dir for it.
Signed-off-by: NJan Kara <jack@suse.cz>

There is going to be a new version of quota format having 64-bit
quota limits and a new quota format for OCFS2. They are both
going to use the same tree structure as VFSv0 quota format. So
split out tree handling into a separate file and make size of
leaf blocks, amount of space usable in each block (needed for
checksumming) and structures contained in them configurable
so that the code can be shared.
Signed-off-by: NJan Kara <jack@suse.cz>
Signed-off-by: NMark Fasheh <mfasheh@suse.com>