From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx2.suse.de ([195.135.220.15]:51482 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932172AbcFCPnB (ORCPT ); Fri, 3 Jun 2016 11:43:01 -0400 Received: from relay1.suse.de (charybdis-ext.suse.de [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 99153AD2E for ; Fri, 3 Jun 2016 15:43:00 +0000 (UTC) From: David Sterba To: stable@vger.kernel.org Subject: [PATCH 07/21] btrfs: add read-only check to sysfs handler of features Date: Fri, 3 Jun 2016 17:42:21 +0200 Message-Id: <1464968541-6494-1-git-send-email-dsterba@suse.com> In-Reply-To: <20160603154006.GP29147@suse.cz> References: <20160603154006.GP29147@suse.cz> Sender: stable-owner@vger.kernel.org List-ID: From: David Sterba commit ee6111386a1b304f8bf589d36810d53e3b27ee20 upstream. We don't want to trigger the change on a read-only filesystem, similar to what the label handler does. Signed-off-by: David Sterba --- fs/btrfs/sysfs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 539e7b5e3f86..6a6bb600b1ff 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -120,6 +120,9 @@ static ssize_t btrfs_feature_attr_store(struct kobject *kobj, if (!fs_info) return -EPERM; + if (fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + ret = kstrtoul(skip_spaces(buf), 0, &val); if (ret) return ret; -- 2.7.1