From: Josef Bacik <josef@redhat.com>
Date: Tue, 14 Jun 2011 19:16:14 +0000 (-0400)
Subject: Btrfs: protect the pending_snapshots list with trans_lock
X-Git-Tag: v3.0-rc4~9^2~5^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8351583e3f6e430ce8f71913909a96ad5cc6a2f6;p=pandora-kernel.git

Btrfs: protect the pending_snapshots list with trans_lock

Currently there is nothing protecting the pending_snapshots list on the
transaction.  We only hold the directory mutex that we are snapshotting and a
read lock on the subvol_sem, so we could race with somebody else creating a
snapshot in a different directory and end up with list corruption.  So protect
this list with the trans_lock.  Thanks,

Signed-off-by: Josef Bacik <josef@redhat.com>
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