ceph/src/messages/MLock.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15
  16 #ifndef CEPH_MLOCK_H
  17 #define CEPH_MLOCK_H
  18
  19 #include "msg/Message.h"
  20 #include "mds/locks.h"
  21
  22 class MLock : public Message {
  23   int32_t     action;  // action type
  24   int32_t     asker;  // who is initiating this request
  25   metareqid_t reqid;  // for remote lock requests
  26
  27   __u16      lock_type;  // lock object type
  28   MDSCacheObjectInfo object_info;
  29
  30   bufferlist lockdata;  // and possibly some data
  31
  32 public:
  33   bufferlist& get_data() { return lockdata; }
  34   int get_asker() { return asker; }
  35   int get_action() { return action; }
  36   metareqid_t get_reqid() { return reqid; }
  37
  38   int get_lock_type() { return lock_type; }
  39   MDSCacheObjectInfo &get_object_info() { return object_info; }
  40
  41   MLock() : Message(MSG_MDS_LOCK) {}
  42   MLock(int ac, int as) :
  43     Message(MSG_MDS_LOCK),
  44     action(ac), asker(as),
  45     lock_type(0) { }
  46   MLock(SimpleLock *lock, int ac, int as) :
  47     Message(MSG_MDS_LOCK),
  48     action(ac), asker(as),
  49     lock_type(lock->get_type()) {
  50     lock->get_parent()->set_object_info(object_info);
  51   }
  52   MLock(SimpleLock *lock, int ac, int as, bufferlist& bl) :
  53     Message(MSG_MDS_LOCK),
  54     action(ac), asker(as), lock_type(lock->get_type()) {
  55     lock->get_parent()->set_object_info(object_info);
  56     lockdata.claim(bl);
  57   }
  58 private:
  59   ~MLock() override {}
  60
  61 public:
  62   const char *get_type_name() const override { return "ILock"; }
  63   void print(ostream& out) const override {
  64     out << "lock(a=" << get_lock_action_name(action)
  65         << " " << get_lock_type_name(lock_type)
  66         << " " << object_info
  67         << ")";
  68   }
  69
  70   void set_reqid(metareqid_t ri) { reqid = ri; }
  71   void set_data(const bufferlist& lockdata) {
  72     this->lockdata = lockdata;
  73   }
  74
  75   void decode_payload() override {
  76     bufferlist::iterator p = payload.begin();
  77     ::decode(asker, p);
  78     ::decode(action, p);
  79     ::decode(reqid, p);
  80     ::decode(lock_type, p);
  81     ::decode(object_info, p);
  82     ::decode(lockdata, p);
  83   }
  84   void encode_payload(uint64_t features) override {
  85     ::encode(asker, payload);
  86     ::encode(action, payload);
  87     ::encode(reqid, payload);
  88     ::encode(lock_type, payload);
  89     ::encode(object_info, payload);
  90     ::encode(lockdata, payload);
  91   }
  92
  93 };
  94
  95 #endif