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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 XSky <haomai@xsky.com>
*
* Author: Haomai Wang <haomaiwang@gmail.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.
*
*/
#include <libgen.h>
#include <unistd.h>
#include "BlockDevice.h"
#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
#include "kernel/KernelDevice.h"
#endif
#if defined(HAVE_SPDK)
#include "spdk/NVMEDevice.h"
#endif
#if defined(HAVE_BLUESTORE_PMEM)
#include "pmem/PMEMDevice.h"
#endif
#if defined(HAVE_LIBZBD)
#include "zoned/HMSMRDevice.h"
#endif
#include "common/debug.h"
#include "common/EventTrace.h"
#include "common/errno.h"
#include "include/compat.h"
#define dout_context cct
#define dout_subsys ceph_subsys_bdev
#undef dout_prefix
#define dout_prefix *_dout << "bdev "
using std::string;
void IOContext::aio_wait()
{
std::unique_lock l(lock);
// see _aio_thread for waker logic
while (num_running.load() > 0) {
dout(10) << __func__ << " " << this
<< " waiting for " << num_running.load() << " aios to complete"
<< dendl;
cond.wait(l);
}
dout(20) << __func__ << " " << this << " done" << dendl;
}
uint64_t IOContext::get_num_ios() const
{
// this is about the simplest model for transaction cost you can
// imagine. there is some fixed overhead cost by saying there is a
// minimum of one "io". and then we have some cost per "io" that is
// a configurable (with different hdd and ssd defaults), and add
// that to the bytes value.
uint64_t ios = 0;
#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
ios += pending_aios.size();
#endif
#ifdef HAVE_SPDK
ios += total_nseg;
#endif
return ios;
}
void IOContext::release_running_aios()
{
ceph_assert(!num_running);
#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
// release aio contexts (including pinned buffers).
running_aios.clear();
#endif
}
BlockDevice::block_device_t
BlockDevice::detect_device_type(const std::string& path)
{
#if defined(HAVE_SPDK)
if (NVMEDevice::support(path)) {
return block_device_t::spdk;
}
#endif
#if defined(HAVE_BLUESTORE_PMEM)
if (PMEMDevice::support(path)) {
return block_device_t::pmem;
}
#endif
#if (defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)) && defined(HAVE_LIBZBD)
if (HMSMRDevice::support(path)) {
return block_device_t::hm_smr;
}
#endif
return block_device_t::aio;
}
BlockDevice::block_device_t
BlockDevice::device_type_from_name(const std::string& blk_dev_name)
{
#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
if (blk_dev_name == "aio") {
return block_device_t::aio;
}
#endif
#if defined(HAVE_SPDK)
if (blk_dev_name == "spdk") {
return block_device_t::spdk;
}
#endif
#if defined(HAVE_BLUESTORE_PMEM)
if (blk_dev_name == "pmem") {
return block_device_t::pmem;
}
#endif
#if (defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)) && defined(HAVE_LIBZBD)
if (blk_dev_name == "hm_smr") {
return block_device_t::hm_smr;
}
#endif
return block_device_t::unknown;
}
BlockDevice* BlockDevice::create_with_type(block_device_t device_type,
CephContext* cct, const std::string& path, aio_callback_t cb,
void *cbpriv, aio_callback_t d_cb, void *d_cbpriv)
{
switch (device_type) {
#if defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)
case block_device_t::aio:
return new KernelDevice(cct, cb, cbpriv, d_cb, d_cbpriv);
#endif
#if defined(HAVE_SPDK)
case block_device_t::spdk:
return new NVMEDevice(cct, cb, cbpriv);
#endif
#if defined(HAVE_BLUESTORE_PMEM)
case block_device_t::pmem:
return new PMEMDevice(cct, cb, cbpriv);
#endif
#if (defined(HAVE_LIBAIO) || defined(HAVE_POSIXAIO)) && defined(HAVE_LIBZBD)
case block_device_t::hm_smr:
return new HMSMRDevice(cct, cb, cbpriv, d_cb, d_cbpriv);
#endif
default:
ceph_abort_msg("unsupported device");
return nullptr;
}
}
BlockDevice *BlockDevice::create(
CephContext* cct, const string& path, aio_callback_t cb,
void *cbpriv, aio_callback_t d_cb, void *d_cbpriv)
{
const string blk_dev_name = cct->_conf.get_val<string>("bdev_type");
block_device_t device_type = block_device_t::unknown;
if (blk_dev_name.empty()) {
device_type = detect_device_type(path);
} else {
device_type = device_type_from_name(blk_dev_name);
}
return create_with_type(device_type, cct, path, cb, cbpriv, d_cb, d_cbpriv);
}
void BlockDevice::queue_reap_ioc(IOContext *ioc)
{
std::lock_guard l(ioc_reap_lock);
if (ioc_reap_count.load() == 0)
++ioc_reap_count;
ioc_reap_queue.push_back(ioc);
}
void BlockDevice::reap_ioc()
{
if (ioc_reap_count.load()) {
std::lock_guard l(ioc_reap_lock);
for (auto p : ioc_reap_queue) {
dout(20) << __func__ << " reap ioc " << p << dendl;
delete p;
}
ioc_reap_queue.clear();
--ioc_reap_count;
}
}
bool BlockDevice::is_valid_io(uint64_t off, uint64_t len) const {
bool ret = (off % block_size == 0 &&
len % block_size == 0 &&
len > 0 &&
off < size &&
off + len <= size);
if (!ret) {
derr << __func__ << " " << std::hex
<< off << "~" << len
<< " block_size " << block_size
<< " size " << size
<< std::dec << dendl;
}
return ret;
}
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