From: Amir Goldstein <amir73il@gmail.com>
Date: Mon, 21 Mar 2011 01:13:43 +0000 (-0400)
Subject: jbd2: add COW fields to struct jbd2_journal_handle
X-Git-Tag: v2.6.39-rc1~73^2~10
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=93737456d68ddcb86232f669b83da673dd12e351;p=pandora-kernel.git

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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