From: Liu Bo <liubo2009@cn.fujitsu.com>
Date: Thu, 10 May 2012 10:10:38 +0000 (+0800)
Subject: Btrfs: fix wrong error returned by adding a device
X-Git-Tag: v3.5-rc1~17^2~1^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f8c5d0b443ff87c43ba690fa2b5bd2c9387d8624;p=pandora-kernel.git

Btrfs: fix wrong error returned by adding a device

Reproduce:
$ mkfs.btrfs /dev/sdb7
$ mount /dev/sdb7 /mnt/btrfs -o ro
$ btrfs dev add /dev/sdb8 /mnt/btrfs
ERROR: error adding the device '/dev/sdb8' - Invalid argument

Since we mount with readonly options, and /dev/sdb7 is not a seeding one,
a readonly notification is preferred.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Reviewed-by: Josef Bacik <josef@redhat.com>
---

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