From 93737456d68ddcb86232f669b83da673dd12e351 Mon Sep 17 00:00:00 2001
From: Amir Goldstein <amir73il@gmail.com>
Date: Sun, 20 Mar 2011 21:13:43 -0400
Subject: [PATCH] jbd2: add COW fields to struct jbd2_journal_handle

Add fields needed for the copy-on-write ext4 development work.

The h_cowing flag is used by ext4 snapshots code to mark the task in
COWING state.

The h_XXX_credits fields are used to track buffer credits usage
(accounted by COW and non-COW operations).

The h_cow_XXX fields are used as per task debugging counters.

Merging this commit into mainline will allow users to test ext4
snapshots as a standalone module, without the need to patch and
install a development kernel.

Signed-off-by: Amir Goldstein <amir73il@users.sf.net>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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