From: Qu Wenruo <quwenruo@cn.fujitsu.com>
Date: Thu, 16 Apr 2015 07:37:33 +0000 (+0800)
Subject: btrfs: qgroup: Add new qgroup calculation function
X-Git-Tag: omap-for-v4.3/legacy-v2-signed~98^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=550d7a2ed5db35756222ec17cff3376ff38d78e2;p=pandora-kernel.git

btrfs: qgroup: Add new qgroup calculation function
btrfs_qgroup_account_extents().

The new btrfs_qgroup_account_extents() function should be called in
btrfs_commit_transaction() and it will update all the qgroup according
to delayed_ref_root->dirty_extent_root.

The new function can handle both normal operation during
commit_transaction() or in rescan in a unified method with clearer
logic.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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