ceph/src/librbd/managed_lock/Utils.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #include "include/assert.h"
   5 #include "librbd/managed_lock/Utils.h"
   6 #include <sstream>
   7
   8 namespace librbd {
   9 namespace managed_lock {
  10 namespace util {
  11
  12 namespace {
  13
  14 const std::string WATCHER_LOCK_COOKIE_PREFIX = "auto";
  15 const std::string WATCHER_LOCK_TAG("internal");
  16
  17 } // anonymous namespace
  18
  19 const std::string &get_watcher_lock_tag() {
  20   return WATCHER_LOCK_TAG;
  21 }
  22
  23 bool decode_lock_cookie(const std::string &tag, uint64_t *handle) {
  24   std::string prefix;
  25   std::istringstream ss(tag);
  26   if (!(ss >> prefix >> *handle) || prefix != WATCHER_LOCK_COOKIE_PREFIX) {
  27     return false;
  28   }
  29   return true;
  30 }
  31
  32 std::string encode_lock_cookie(uint64_t watch_handle) {
  33   assert(watch_handle != 0);
  34   std::ostringstream ss;
  35   ss << WATCHER_LOCK_COOKIE_PREFIX << " " << watch_handle;
  36   return ss.str();
  37 }
  38
  39 } // namespace util
  40 } // namespace managed_lock
  41 } // namespace librbd
  42
  43