This is a note to let you know that I've just added the patch titled
btrfs: add read-only check to sysfs handler of features
to the 4.5-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-add-read-only-check-to-sysfs-handler-of-features.patch
and it can be found in the queue-4.5 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ee6111386a1b304f8bf589d36810d53e3b27ee20 Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@xxxxxxx>
Date: Fri, 23 Jan 2015 18:43:31 +0100
Subject: btrfs: add read-only check to sysfs handler of features
From: David Sterba <dsterba@xxxxxxx>
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 <dsterba@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/sysfs.c | 3 +++
1 file changed, 3 insertions(+)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -120,6 +120,9 @@ static ssize_t btrfs_feature_attr_store(
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;
Patches currently in stable-queue which might be from dsterba@xxxxxxx are
queue-4.5/btrfs-add-read-only-check-to-sysfs-handler-of-features.patch
queue-4.5/btrfs-add-write-protection-to-set_features-ioctl.patch
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