#include <linux/blkdev.h>
#include <linux/random.h>
#include <linux/iocontext.h>
+#include <linux/capability.h>
#include <asm/div64.h>
#include "compat.h"
#include "ctree.h"
if (dev_root->fs_info->sb->s_flags & MS_RDONLY)
return -EROFS;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
mutex_lock(&dev_root->fs_info->volume_mutex);
dev_root = dev_root->fs_info->dev_root;