tree ded5f48f6cf82db976f30d5f0f4d44b941f60f44
parent bbbd0eb34bf801dee01e345785959a75258f6567
author Jan Kara <jack@suse.cz> 1219687010 +0200
committer Mark Fasheh <mfasheh@suse.com> 1231173623 -0800

ocfs2: Implementation of local and global quota file handling

For each quota type each node has local quota file. In this file it stores
changes users have made to disk usage via this node. Once in a while this
information is synced to global file (and thus with other nodes) so that
limits enforcement at least aproximately works.

Global quota files contain all the information about usage and limits. It's
mostly handled by the generic VFS code (which implements a trie of structures
inside a quota file). We only have to provide functions to convert structures
from on-disk format to in-memory one. We also have to provide wrappers for
various quota functions starting transactions and acquiring necessary cluster
locks before the actual IO is really started.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>