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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) 2015 Intel <jianpeng.ma@intel.com>
*
* Author: Jianpeng Ma <jianpeng.ma@intel.com>
*
* 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_BLK_PMEMDEVICE_H
#define CEPH_BLK_PMEMDEVICE_H
#include <atomic>
#include "os/fs/FS.h"
#include "include/interval_set.h"
#include "aio/aio.h"
#include "BlockDevice.h"
class PMEMDevice : public BlockDevice {
int fd;
char *addr; //the address of mmap
std::string path;
ceph::mutex debug_lock = ceph::make_mutex("PMEMDevice::debug_lock");
interval_set<uint64_t> debug_inflight;
std::atomic_int injecting_crash;
int _lock();
public:
PMEMDevice(CephContext *cct, aio_callback_t cb, void *cbpriv);
void aio_submit(IOContext *ioc) override;
int collect_metadata(const std::string& prefix, map<std::string,std::string> *pm) const override;
static bool support(const std::string& path);
int read(uint64_t off, uint64_t len, bufferlist *pbl,
IOContext *ioc,
bool buffered) override;
int aio_read(uint64_t off, uint64_t len, bufferlist *pbl,
IOContext *ioc) override;
int read_random(uint64_t off, uint64_t len, char *buf, bool buffered) override;
int write(uint64_t off, bufferlist& bl, bool buffered, int write_hint = WRITE_LIFE_NOT_SET) override;
int aio_write(uint64_t off, bufferlist& bl,
IOContext *ioc,
bool buffered,
int write_hint = WRITE_LIFE_NOT_SET) override;
int flush() override;
// for managing buffered readers/writers
int invalidate_cache(uint64_t off, uint64_t len) override;
int open(const std::string &path) override;
void close() override;
private:
bool is_valid_io(uint64_t off, uint64_t len) const {
return (len > 0 &&
off < size &&
off + len <= size);
}
};
#endif
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