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diff --git a/src/ceph/src/messages/MPoolOp.h b/src/ceph/src/messages/MPoolOp.h
new file mode 100644
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--- /dev/null
+++ b/src/ceph/src/messages/MPoolOp.h
@@ -0,0 +1,101 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software 
+ * Foundation.  See file COPYING.
+ * 
+ */
+
+#ifndef CEPH_MPOOLOP_H
+#define CEPH_MPOOLOP_H
+
+#include "messages/PaxosServiceMessage.h"
+
+
+class MPoolOp : public PaxosServiceMessage {
+
+  static const int HEAD_VERSION = 4;
+  static const int COMPAT_VERSION = 2;
+
+public:
+  uuid_d fsid;
+  __u32 pool = 0;
+  string name;
+  __u32 op = 0;
+  uint64_t auid = 0;
+  snapid_t snapid;
+  __s16 crush_rule = 0;
+
+  MPoolOp()
+    : PaxosServiceMessage(CEPH_MSG_POOLOP, 0, HEAD_VERSION, COMPAT_VERSION) { }
+  MPoolOp(const uuid_d& f, ceph_tid_t t, int p, string& n, int o, version_t v)
+    : PaxosServiceMessage(CEPH_MSG_POOLOP, v, HEAD_VERSION, COMPAT_VERSION),
+      fsid(f), pool(p), name(n), op(o),
+      auid(0), snapid(0), crush_rule(0) {
+    set_tid(t);
+  }
+  MPoolOp(const uuid_d& f, ceph_tid_t t, int p, string& n,
+	  int o, uint64_t uid, version_t v)
+    : PaxosServiceMessage(CEPH_MSG_POOLOP, v, HEAD_VERSION, COMPAT_VERSION),
+      fsid(f), pool(p), name(n), op(o),
+      auid(uid), snapid(0), crush_rule(0) {
+    set_tid(t);
+  }
+
+private:
+  ~MPoolOp() override {}
+
+public:
+  const char *get_type_name() const override { return "poolop"; }
+  void print(ostream& out) const override {
+    out << "pool_op(" << ceph_pool_op_name(op) << " pool " << pool
+	<< " auid " << auid
+	<< " tid " << get_tid()
+	<< " name " << name
+	<< " v" << version << ")";
+  }
+
+  void encode_payload(uint64_t features) override {
+    paxos_encode();
+    ::encode(fsid, payload);
+    ::encode(pool, payload);
+    ::encode(op, payload);
+    ::encode(auid, payload);
+    ::encode(snapid, payload);
+    ::encode(name, payload);
+    __u8 pad = 0;
+    ::encode(pad, payload);  /* for v3->v4 encoding change */
+    ::encode(crush_rule, payload);
+  }
+  void decode_payload() override {
+    bufferlist::iterator p = payload.begin();
+    paxos_decode(p);
+    ::decode(fsid, p);
+    ::decode(pool, p);
+    if (header.version < 2)
+      ::decode(name, p);
+    ::decode(op, p);
+    ::decode(auid, p);
+    ::decode(snapid, p);
+    if (header.version >= 2)
+      ::decode(name, p);
+
+    if (header.version >= 3) {
+      __u8 pad;
+      ::decode(pad, p);
+      if (header.version >= 4)
+	::decode(crush_rule, p);
+      else
+	crush_rule = pad;
+    } else
+      crush_rule = -1;
+  }
+};
+
+#endif