From: Jan Schmidt <list.btrfs@jan-o-sch.net>
Date: Fri, 23 Mar 2012 16:32:28 +0000 (+0100)
Subject: Btrfs: fix regression in scrub path resolving
X-Git-Tag: v3.4-rc1~22^2~11^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a3ae2f8c8c8432e65467b7fc84d5deab04061a0;p=pandora-kernel.git

Btrfs: fix regression in scrub path resolving

In commit 4692cf58 we introduced new backref walking code for btrfs. This
assumes we're searching live roots, which requires a transaction context.
While scrubbing, however, we must not join a transaction because this could
deadlock with the commit path. Additionally, what scrub really wants to do
is resolving a logical address in the commit root it's currently checking.

This patch adds support for logical to path resolving on commit roots and
makes scrub use that.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
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