#!/usr/bin/stap

global ATTR_MODE = 1

probe kernel.function("setattr_copy")!,
      kernel.function("generic_setattr")!,
      kernel.function("inode_setattr") {
  dev_nr = $inode->i_sb->s_dev
  inode_nr = $inode->i_ino

  if (dev_nr == MKDEV($1,$2) # major/minor device
      && inode_nr == $3
      && $attr->ia_valid & ATTR_MODE)
    printf ("%s(%d) %s 0x%x/%u %o %d\n",
      execname(), pid(), probefunc(), dev_nr, inode_nr, $attr->ia_mode, uid())
}