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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 {
CDir::fnode_const_ptr fnode;
dirfrag_rollback() { }
void encode(bufferlist& bl) const;
void decode(bufferlist::const_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)
frag_vec_t orig_frags;
bufferlist rollback;
EFragment() : LogEvent(EVENT_FRAGMENT) { }
EFragment(MDLog *mdlog, int o, dirfrag_t df, int b) :
LogEvent(EVENT_FRAGMENT),
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 std::string_view 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) {
using ceph::encode;
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::const_iterator &bl) override;
void dump(Formatter *f) const override;
static void generate_test_instances(std::list<EFragment*>& ls);
void replay(MDSRank *mds) override;
};
WRITE_CLASS_ENCODER_FEATURES(EFragment)
#endif
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