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btrfs: add read-only check to sysfs handler of features 

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>
steinar/wifi_calib_4_9_kernel
David Sterba 2015-01-23 18:43:31 +01:00 committed by David Sterba
parent e6c11f9a46
commit ee6111386a
1 changed files with 3 additions and 0 deletions
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3
fs/btrfs/sysfs.c
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@ -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;