From: Joe Thornber <ejt@redhat.com>
Date: Tue, 7 Jan 2014 15:47:59 +0000 (+0000)
Subject: dm space map common: make sure new space is used during extend
X-Git-Tag: v3.14-rc1~130^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12c91a5c2d2a8e8cc40a9552313e1e7b0a2d9ee3;p=pandora-kernel.git

dm space map common: make sure new space is used during extend

When extending a low level space map we should update nr_blocks at
the start so the new space is used for the index entries.

Otherwise extend can fail, e.g.: sm_metadata_extend call sequence
that fails:
 -> sm_ll_extend
    -> dm_tm_new_block -> dm_sm_new_block -> sm_bootstrap_new_block
    => returns -ENOSPC because smm->begin == smm->ll.nr_blocks

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
---

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