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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) 2011 New Dream Network
*
* 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 "rados_sync.h"
#include "common/errno.h"
#include "common/strtol.h"
#include "include/rados/librados.hpp"
#include <dirent.h>
#include <errno.h>
#include <fstream>
#include <inttypes.h>
#include <iostream>
#include <sstream>
#include <stdlib.h>
#include <string>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "include/compat.h"
#include "common/xattr.h"
using namespace librados;
class ExportLocalFileWQ : public RadosSyncWQ {
public:
ExportLocalFileWQ(IoCtxDistributor *io_ctx_dist, time_t ti,
ThreadPool *tp, ExportDir *export_dir, bool force)
: RadosSyncWQ(io_ctx_dist, ti, 0, tp),
m_export_dir(export_dir),
m_force(force)
{
}
private:
void _process(std::string *s) {
IoCtx &io_ctx(m_io_ctx_dist->get_ioctx());
int flags = 0;
auto_ptr <BackedUpObject> sobj;
auto_ptr <BackedUpObject> dobj;
const std::string &rados_name(*s);
std::list < std::string > only_in_a;
std::list < std::string > only_in_b;
std::list < std::string > diff;
int ret = BackedUpObject::from_rados(io_ctx, rados_name.c_str(), sobj);
if (ret) {
cerr << ERR_PREFIX << "couldn't get '" << rados_name << "' from rados: error "
<< ret << std::endl;
_exit(ret);
}
std::string obj_path(sobj->get_fs_path(m_export_dir));
if (m_force) {
flags |= (CHANGED_CONTENTS | CHANGED_XATTRS);
}
else {
ret = BackedUpObject::from_path(obj_path.c_str(), dobj);
if (ret == ENOENT) {
sobj->get_xattrs(only_in_a);
flags |= CHANGED_CONTENTS;
}
else if (ret) {
cerr << ERR_PREFIX << "BackedUpObject::from_path returned "
<< ret << std::endl;
_exit(ret);
}
else {
sobj->xattr_diff(dobj.get(), only_in_a, only_in_b, diff);
if ((sobj->get_rados_size() == dobj->get_rados_size()) &&
(sobj->get_mtime() == dobj->get_mtime())) {
flags |= CHANGED_CONTENTS;
}
}
}
if (flags & CHANGED_CONTENTS) {
ret = sobj->download(io_ctx, obj_path.c_str());
if (ret) {
cerr << ERR_PREFIX << "download error: " << ret << std::endl;
_exit(ret);
}
}
diff.splice(diff.begin(), only_in_a);
for (std::list < std::string >::const_iterator x = diff.begin();
x != diff.end(); ++x) {
flags |= CHANGED_XATTRS;
const Xattr *xattr = sobj->get_xattr(*x);
if (xattr == NULL) {
cerr << ERR_PREFIX << "internal error on line: " << __LINE__ << std::endl;
_exit(ret);
}
std::string xattr_fs_name(USER_XATTR_PREFIX);
xattr_fs_name += x->c_str();
ret = ceph_os_setxattr(obj_path.c_str(), xattr_fs_name.c_str(),
xattr->data, xattr->len);
if (ret) {
ret = errno;
cerr << ERR_PREFIX << "setxattr error: " << cpp_strerror(ret) << std::endl;
_exit(ret);
}
}
for (std::list < std::string >::const_iterator x = only_in_b.begin();
x != only_in_b.end(); ++x) {
flags |= CHANGED_XATTRS;
ret = ceph_os_removexattr(obj_path.c_str(), x->c_str());
if (ret) {
ret = errno;
cerr << ERR_PREFIX << "removexattr error: " << cpp_strerror(ret) << std::endl;
_exit(ret);
}
}
if (m_force) {
cout << "[force] " << rados_name << std::endl;
}
else if (flags & CHANGED_CONTENTS) {
cout << "[exported] " << rados_name << std::endl;
}
else if (flags & CHANGED_XATTRS) {
cout << "[xattr] " << rados_name << std::endl;
}
}
ExportDir *m_export_dir;
bool m_force;
};
class ExportValidateExistingWQ : public RadosSyncWQ {
public:
ExportValidateExistingWQ(IoCtxDistributor *io_ctx_dist, time_t ti,
ThreadPool *tp, const char *dir_name)
: RadosSyncWQ(io_ctx_dist, ti, 0, tp),
m_dir_name(dir_name)
{
}
private:
void _process(std::string *s) {
IoCtx &io_ctx(m_io_ctx_dist->get_ioctx());
auto_ptr <BackedUpObject> lobj;
const std::string &local_name(*s);
int ret = BackedUpObject::from_file(local_name.c_str(), m_dir_name, lobj);
if (ret) {
cout << ERR_PREFIX << "BackedUpObject::from_file: delete loop: "
<< "got error " << ret << std::endl;
_exit(ret);
}
auto_ptr <BackedUpObject> robj;
ret = BackedUpObject::from_rados(io_ctx, lobj->get_rados_name(), robj);
if (ret == -ENOENT) {
// The entry doesn't exist on the remote server; delete it locally
char path[strlen(m_dir_name) + local_name.size() + 2];
snprintf(path, sizeof(path), "%s/%s", m_dir_name, local_name.c_str());
if (unlink(path)) {
ret = errno;
cerr << ERR_PREFIX << "error unlinking '" << path << "': "
<< cpp_strerror(ret) << std::endl;
_exit(ret);
}
cout << "[deleted] " << "removed '" << local_name << "'" << std::endl;
}
else if (ret) {
cerr << ERR_PREFIX << "BackedUpObject::from_rados: delete loop: "
<< "got error " << ret << std::endl;
_exit(ret);
}
}
const char *m_dir_name;
};
int do_rados_export(ThreadPool *tp, IoCtx& io_ctx,
IoCtxDistributor *io_ctx_dist, const char *dir_name,
bool create, bool force, bool delete_after)
{
int ret;
librados::ObjectIterator oi = io_ctx.objects_begin();
librados::ObjectIterator oi_end = io_ctx.objects_end();
auto_ptr <ExportDir> export_dir;
export_dir.reset(ExportDir::create_for_writing(dir_name, 1, create));
if (!export_dir.get())
return -EIO;
ExportLocalFileWQ export_object_wq(io_ctx_dist, time(NULL),
tp, export_dir.get(), force);
for (; oi != oi_end; ++oi) {
export_object_wq.queue(new std::string((*oi).first));
}
export_object_wq.drain();
if (delete_after) {
ExportValidateExistingWQ export_val_wq(io_ctx_dist, time(NULL),
tp, dir_name);
DirHolder dh;
int err = dh.opendir(dir_name);
if (err) {
cerr << ERR_PREFIX << "opendir(" << dir_name << ") error: "
<< cpp_strerror(err) << std::endl;
return err;
}
while (true) {
struct dirent *de = readdir(dh.dp);
if (!de)
break;
if ((strcmp(de->d_name, ".") == 0) || (strcmp(de->d_name, "..") == 0))
continue;
if (is_suffix(de->d_name, RADOS_SYNC_TMP_SUFFIX)) {
char path[strlen(dir_name) + strlen(de->d_name) + 2];
snprintf(path, sizeof(path), "%s/%s", dir_name, de->d_name);
if (unlink(path)) {
ret = errno;
cerr << ERR_PREFIX << "error unlinking temporary file '" << path << "': "
<< cpp_strerror(ret) << std::endl;
return ret;
}
cout << "[deleted] " << "removed temporary file '" << de->d_name << "'" << std::endl;
continue;
}
export_val_wq.queue(new std::string(de->d_name));
}
export_val_wq.drain();
}
cout << "[done]" << std::endl;
return 0;
}
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