initial code repo

[stor4nfv.git] / src / ceph / src / mds / events / EFragment.h

diff --git a/src/ceph/src/mds/events/EFragment.h b/src/ceph/src/mds/events/EFragment.h
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+++ b/src/ceph/src/mds/events/EFragment.h
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+// -*- 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_MDS_EFRAGMENT_H
+#define CEPH_MDS_EFRAGMENT_H
+
+#include "../LogEvent.h"
+#include "EMetaBlob.h"
+
+struct dirfrag_rollback {
+  fnode_t fnode;
+  dirfrag_rollback() { }
+  void encode(bufferlist& bl) const;
+  void decode(bufferlist::iterator& bl);
+};
+WRITE_CLASS_ENCODER(dirfrag_rollback)
+
+class EFragment : public LogEvent {
+public:
+  EMetaBlob metablob;
+  __u8 op{0};
+  inodeno_t ino;
+  frag_t basefrag;
+  __s32 bits{0};         // positive for split (from basefrag), negative for merge (to basefrag)
+  list<frag_t> orig_frags;
+  bufferlist rollback;
+
+  EFragment() : LogEvent(EVENT_FRAGMENT) { }
+  EFragment(MDLog *mdlog, int o, dirfrag_t df, int b) :
+    LogEvent(EVENT_FRAGMENT), metablob(mdlog), 
+    op(o), ino(df.ino), basefrag(df.frag), bits(b) { }
+
+  void print(ostream& out) const override {
+    out << "EFragment " << op_name(op) << " " << ino << " " << basefrag << " by " << bits << " " << metablob;
+  }
+
+  enum {
+    OP_PREPARE = 1,
+    OP_COMMIT = 2,
+    OP_ROLLBACK = 3,
+    OP_FINISH = 4 // finish deleting orphan dirfrags
+  };
+  static const char *op_name(int o) {
+    switch (o) {
+    case OP_PREPARE: return "prepare";
+    case OP_COMMIT: return "commit";
+    case OP_ROLLBACK: return "rollback";
+    case OP_FINISH: return "finish";
+    default: return "???";
+    }
+  }
+
+  void add_orig_frag(frag_t df, dirfrag_rollback *drb=NULL) {
+    orig_frags.push_back(df);
+    if (drb)
+      ::encode(*drb, rollback);
+  }
+
+  EMetaBlob *get_metablob() override { return &metablob; }
+
+  void encode(bufferlist &bl, uint64_t features) const override;
+  void decode(bufferlist::iterator &bl) override;
+  void dump(Formatter *f) const override;
+  static void generate_test_instances(list<EFragment*>& ls);
+  void replay(MDSRank *mds) override;
+};
+WRITE_CLASS_ENCODER_FEATURES(EFragment)
+
+#endif