btrfs: Make btrfs handle security mount options internally to avoid losing security...

[cascardo/linux.git] / fs / btrfs / sysfs.c

diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index a1c1088..b2e7bb4 100644 (file)
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -377,6 +377,9 @@ static ssize_t btrfs_label_store(struct kobject *kobj,
        int ret;
        size_t p_len;
 
+       if (fs_info->sb->s_flags & MS_RDONLY)
+               return -EROFS;
+
        /*
         * p_len is the len until the first occurrence of either
         * '\n' or '\0'
@@ -401,7 +404,7 @@ static ssize_t btrfs_label_store(struct kobject *kobj,
 
        return ret;
 }
-BTRFS_ATTR_RW(label, 0644, btrfs_label_show, btrfs_label_store);
+BTRFS_ATTR_RW(label, btrfs_label_show, btrfs_label_store);
 
 static ssize_t btrfs_nodesize_show(struct kobject *kobj,
                                struct kobj_attribute *a, char *buf)