+++ /dev/null
-// -*- 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) 2014 Red Hat
- *
- * 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_OS_BLUESTORE_KERNELDEVICE_H
-#define CEPH_OS_BLUESTORE_KERNELDEVICE_H
-
-#include <atomic>
-
-#include "os/fs/FS.h"
-#include "include/interval_set.h"
-
-#include "aio.h"
-#include "BlockDevice.h"
-
-class KernelDevice : public BlockDevice {
- int fd_direct, fd_buffered;
- uint64_t size;
- uint64_t block_size;
- std::string path;
- FS *fs;
- bool aio, dio;
-
- Mutex debug_lock;
- interval_set<uint64_t> debug_inflight;
-
- std::atomic<bool> io_since_flush = {false};
- std::mutex flush_mutex;
-
- aio_queue_t aio_queue;
- aio_callback_t aio_callback;
- void *aio_callback_priv;
- bool aio_stop;
-
- struct AioCompletionThread : public Thread {
- KernelDevice *bdev;
- explicit AioCompletionThread(KernelDevice *b) : bdev(b) {}
- void *entry() override {
- bdev->_aio_thread();
- return NULL;
- }
- } aio_thread;
-
- std::atomic_int injecting_crash;
-
- void _aio_thread();
- int _aio_start();
- void _aio_stop();
-
- void _aio_log_start(IOContext *ioc, uint64_t offset, uint64_t length);
- void _aio_log_finish(IOContext *ioc, uint64_t offset, uint64_t length);
-
- int _sync_write(uint64_t off, bufferlist& bl, bool buffered);
-
- int _lock();
-
- int direct_read_unaligned(uint64_t off, uint64_t len, char *buf);
-
- // stalled aio debugging
- aio_list_t debug_queue;
- std::mutex debug_queue_lock;
- aio_t *debug_oldest = nullptr;
- utime_t debug_stall_since;
- void debug_aio_link(aio_t& aio);
- void debug_aio_unlink(aio_t& aio);
-
-public:
- KernelDevice(CephContext* cct, aio_callback_t cb, void *cbpriv);
-
- void aio_submit(IOContext *ioc) override;
-
- uint64_t get_size() const override {
- return size;
- }
- uint64_t get_block_size() const override {
- return block_size;
- }
-
- int collect_metadata(std::string prefix, map<std::string,std::string> *pm) const override;
-
- 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) override;
- int aio_write(uint64_t off, bufferlist& bl,
- IOContext *ioc,
- bool buffered) 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;
-};
-
-#endif