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 <dste...@suse.cz>
---
This emerged during the discussions about pending changes problems.
fs/btrfs/sysfs.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 92db3f648df4..00b9c46e351c 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -119,6 +119,9 @@ 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;
--
2.1.3
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