Method caps_issued_mask

src/client/Inode.cc:301–344

* caps_issued_mask - check whether we have all of the caps in the mask * @mask: mask to check against * @allow_impl: whether the caller can also use caps that are implemented but not issued * * This is the bog standard "check whether we have the required caps" operation. * Typically, we only check against the capset that is currently "issued". * In other words, we ignore caps that have been

 * caps!
 */
bool Inode::caps_issued_mask(unsigned mask, bool allow_impl)
{
  int c = snap_caps;
  int i = 0;

  if ((c & mask) == mask)
    return true;
  // prefer auth cap
  if (auth_cap &&
      cap_is_valid(*auth_cap) &&
      (auth_cap->issued & mask) == mask) {
    auth_cap->touch();
    client->cap_hit();
    return true;
  }
  // try any cap
  for (auto &pair : caps) {
    Cap &cap = pair.second;
    if (cap_is_valid(cap)) {
      if ((cap.issued & mask) == mask) {
        cap.touch();
	client->cap_hit();
	return true;
      }
      c |= cap.issued;
      i |= cap.implemented;
    }
  }

  if (allow_impl)
    c |= i;

  if ((c & mask) == mask) {
    // bah.. touch them all
    for (auto &pair : caps) {
      pair.second.touch();
    }
    client->cap_hit();
    return true;
  }

  client->cap_miss();
  return false;
}

int Inode::caps_used()
{