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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_LIBRBDWRITEBACKHANDLER_H
#define CEPH_LIBRBD_LIBRBDWRITEBACKHANDLER_H
#include "include/types.h"
#include "osd/osd_types.h"
#include "include/Context.h"
#include "include/rados/librados.hpp"
#include "osdc/WritebackHandler.h"
class Mutex;
namespace librbd {
class ImageCtx;
class LibrbdWriteback : public WritebackHandler {
public:
LibrbdWriteback(ImageCtx *ictx, Mutex& lock);
virtual ~LibrbdWriteback() {}
// Note that oloc, trunc_size, and trunc_seq are ignored
virtual tid_t read(const object_t& oid, const object_locator_t& oloc,
uint64_t off, uint64_t len, snapid_t snapid,
bufferlist *pbl, uint64_t trunc_size, __u32 trunc_seq,
Context *onfinish);
// Determine whether a read to this extent could be affected by a write-triggered copy-on-write
virtual bool may_copy_on_write(const object_t& oid, uint64_t read_off, uint64_t read_len, snapid_t snapid);
// Note that oloc, trunc_size, and trunc_seq are ignored
virtual tid_t write(const object_t& oid, const object_locator_t& oloc,
uint64_t off, uint64_t len, const SnapContext& snapc,
const bufferlist &bl, utime_t mtime, uint64_t trunc_size,
__u32 trunc_seq, Context *oncommit);
private:
int m_tid;
Mutex& m_lock;
librbd::ImageCtx *m_ictx;
};
}
#endif
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