diff mbox

[1/3] btrfs: add read-only check to sysfs handler of features

Message ID b35d435987ef7e1374f4144d9488dc87eb248486.1461681045.git.dsterba@suse.com (mailing list archive)
State Accepted
Headers show

Commit Message

David Sterba April 26, 2016, 2:32 p.m. UTC 
From: David Sterba <dsterba@suse.cz>

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@suse.cz>
---
 fs/btrfs/sysfs.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox

Patch

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;