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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.
*
*/
#include <ctype.h>
#include <sstream>
#include "ObjectStore.h"
#include "common/Formatter.h"
#include "common/safe_io.h"
#include "memstore/MemStore.h"
#if defined(WITH_BLUESTORE)
#include "bluestore/BlueStore.h"
#endif
#ifndef WITH_SEASTAR
#include "kstore/KStore.h"
#endif
using std::string;
std::unique_ptr<ObjectStore> ObjectStore::create(
CephContext *cct,
const string& type,
const string& data)
{
if (type == "memstore") {
return std::make_unique<MemStore>(cct, data);
}
#if defined(WITH_BLUESTORE)
if (type == "bluestore" || type == "random") {
return std::make_unique<BlueStore>(cct, data);
}
#endif
return nullptr;
}
#ifndef WITH_SEASTAR
std::unique_ptr<ObjectStore> ObjectStore::create(
CephContext *cct,
const string& type,
const string& data,
const string& journal,
osflagbits_t flags)
{
if (type == "filestore") {
lgeneric_derr(cct) << __func__ << ": FileStore has been deprecated and is no longer supported" << dendl;
return nullptr;
}
if (type == "kstore" &&
cct->check_experimental_feature_enabled("kstore")) {
return std::make_unique<KStore>(cct, data);
}
return create(cct, type, data);
}
#endif
int ObjectStore::probe_block_device_fsid(
CephContext *cct,
const string& path,
uuid_d *fsid)
{
int r;
#if defined(WITH_BLUESTORE)
// first try bluestore -- it has a crc on its header and will fail
// reliably.
r = BlueStore::get_block_device_fsid(cct, path, fsid);
if (r == 0) {
lgeneric_dout(cct, 0) << __func__ << " " << path << " is bluestore, "
<< *fsid << dendl;
return r;
}
#endif
return -EINVAL;
}
int ObjectStore::write_meta(const std::string& key,
const std::string& value)
{
string v = value;
v += "\n";
int r = safe_write_file(path.c_str(), key.c_str(),
v.c_str(), v.length(), 0600);
if (r < 0)
return r;
return 0;
}
int ObjectStore::read_meta(const std::string& key,
std::string *value)
{
char buf[4096];
int r = safe_read_file(path.c_str(), key.c_str(),
buf, sizeof(buf));
if (r <= 0)
return r;
// drop trailing newlines
while (r && isspace(buf[r-1])) {
--r;
}
*value = string(buf, r);
return 0;
}
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