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rgw_replica_log.cc
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rgw_replica_log.cc
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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
*
* 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.
* Copyright 2013 Inktank
*/
#include "common/ceph_json.h"
#include "rgw_replica_log.h"
#include "cls/replica_log/cls_replica_log_client.h"
#include "cls/rgw/cls_rgw_client.h"
#include "rgw_rados.h"
#define dout_subsys ceph_subsys_rgw
void RGWReplicaBounds::dump(Formatter *f) const
{
encode_json("marker", marker, f);
encode_json("oldest_time", oldest_time, f);
encode_json("markers", markers, f);
}
void RGWReplicaBounds::decode_json(JSONObj *obj) {
JSONDecoder::decode_json("marker", marker, obj);
JSONDecoder::decode_json("oldest_time", oldest_time, obj);
JSONDecoder::decode_json("markers", markers, obj);
}
RGWReplicaLogger::RGWReplicaLogger(RGWRados *_store) :
cct(_store->cct), store(_store) {}
int RGWReplicaLogger::open_ioctx(librados::IoCtx& ctx, const string& pool)
{
int r = store->get_rados_handle()->ioctx_create(pool.c_str(), ctx);
if (r == -ENOENT) {
rgw_bucket p(pool.c_str());
r = store->create_pool(p);
if (r < 0)
return r;
// retry
r = store->get_rados_handle()->ioctx_create(pool.c_str(), ctx);
}
if (r < 0) {
lderr(cct) << "ERROR: could not open rados pool " << pool << dendl;
}
return r;
}
int RGWReplicaLogger::update_bound(const string& oid, const string& pool,
const string& daemon_id,
const string& marker, const utime_t& time,
const list<RGWReplicaItemMarker> *entries,
bool need_to_exist)
{
cls_replica_log_progress_marker progress;
progress.entity_id = daemon_id;
progress.position_marker = marker;
progress.position_time = time;
progress.items = *entries;
librados::IoCtx ioctx;
int r = open_ioctx(ioctx, pool);
if (r < 0) {
return r;
}
librados::ObjectWriteOperation opw;
if (need_to_exist) {
opw.assert_exists();
}
cls_replica_log_update_bound(opw, progress);
return ioctx.operate(oid, &opw);
}
int RGWReplicaLogger::write_bounds(const string& oid, const string& pool,
RGWReplicaBounds& bounds)
{
librados::IoCtx ioctx;
int r = open_ioctx(ioctx, pool);
if (r < 0) {
return r;
}
librados::ObjectWriteOperation opw;
list<RGWReplicaProgressMarker>::iterator iter = bounds.markers.begin();
for (; iter != bounds.markers.end(); ++iter) {
RGWReplicaProgressMarker& progress = *iter;
cls_replica_log_update_bound(opw, progress);
}
r = ioctx.operate(oid, &opw);
if (r < 0) {
return r;
}
return 0;
}
int RGWReplicaLogger::delete_bound(const string& oid, const string& pool,
const string& daemon_id, bool purge_all,
bool need_to_exist)
{
librados::IoCtx ioctx;
int r = open_ioctx(ioctx, pool);
if (r < 0) {
return r;
}
librados::ObjectWriteOperation opw;
if (need_to_exist) {
opw.assert_exists();
}
if (purge_all) {
opw.remove();
} else {
cls_replica_log_delete_bound(opw, daemon_id);
}
return ioctx.operate(oid, &opw);
}
int RGWReplicaLogger::get_bounds(const string& oid, const string& pool,
RGWReplicaBounds& bounds)
{
librados::IoCtx ioctx;
int r = open_ioctx(ioctx, pool);
if (r < 0) {
return r;
}
return cls_replica_log_get_bounds(ioctx, oid, bounds.marker, bounds.oldest_time, bounds.markers);
}
RGWReplicaObjectLogger::
RGWReplicaObjectLogger(RGWRados *_store,
const string& _pool,
const string& _prefix) : RGWReplicaLogger(_store),
pool(_pool), prefix(_prefix) {
if (pool.empty())
store->get_log_pool_name(pool);
}
int RGWReplicaObjectLogger::create_log_objects(int shards)
{
librados::IoCtx ioctx;
int r = open_ioctx(ioctx, pool);
if (r < 0) {
return r;
}
for (int i = 0; i < shards; ++i) {
string oid;
get_shard_oid(i, oid);
r = ioctx.create(oid, false);
if (r < 0)
return r;
}
return r;
}
RGWReplicaBucketLogger::RGWReplicaBucketLogger(RGWRados *_store) :
RGWReplicaLogger(_store)
{
store->get_log_pool_name(pool);
prefix = _store->ctx()->_conf->rgw_replica_log_obj_prefix;
prefix.append(".");
}
string RGWReplicaBucketLogger::obj_name(const rgw_bucket& bucket, int shard_id, bool index_by_instance)
{
string s;
if (index_by_instance) {
s = prefix + bucket.name + ":" + bucket.bucket_id;
} else {
s = prefix + bucket.name;
}
if (shard_id >= 0) {
char buf[16];
snprintf(buf, sizeof(buf), ".%d", shard_id);
s += buf;
}
return s;
}
int RGWReplicaBucketLogger::update_bound(const rgw_bucket& bucket, int shard_id, const string& daemon_id,
const string& marker, const utime_t& time,
const list<RGWReplicaItemMarker> *entries)
{
if (shard_id >= 0 ||
!BucketIndexShardsManager::is_shards_marker(marker)) {
return RGWReplicaLogger::update_bound(obj_name(bucket, shard_id, true), pool,
daemon_id, marker, time, entries,
false);
}
BucketIndexShardsManager sm;
int ret = sm.from_string(marker, shard_id);
if (ret < 0) {
ldout(cct, 0) << "ERROR: could not parse shards marker: " << marker << dendl;
return ret;
}
map<int, string>& vals = sm.get();
ret = 0;
map<int, string>::iterator iter;
for (iter = vals.begin(); iter != vals.end(); ++iter) {
ldout(cct, 20) << "updating bound: bucket=" << bucket << " shard=" << iter->first << " marker=" << marker << dendl;
int r = RGWReplicaLogger::update_bound(obj_name(bucket, iter->first, true), pool,
daemon_id, iter->second, time, entries,
true /* need to exist */);
if (r == -ENOENT) {
RGWReplicaBounds bounds;
r = convert_old_bounds(bucket, -1, bounds);
if (r < 0 && r != -ENOENT) {
return r;
}
r = RGWReplicaLogger::update_bound(obj_name(bucket, iter->first, true), pool,
daemon_id, marker, time, entries, false);
}
if (r < 0) {
ldout(cct, 0) << "failed to update bound: bucket=" << bucket << " shard=" << iter->first << " marker=" << marker << dendl;
ret = r;
}
}
return ret;
}
int RGWReplicaBucketLogger::delete_bound(const rgw_bucket& bucket, int shard_id, const string& daemon_id, bool purge_all)
{
int r = RGWReplicaLogger::delete_bound(obj_name(bucket, shard_id, true), pool, daemon_id, purge_all, true /* need to exist */);
if (r != -ENOENT) {
return r;
}
/*
* can only get here if need_to_exist == true,
* entry is not found, let's convert old entry if exists
*/
RGWReplicaBounds bounds;
r = convert_old_bounds(bucket, shard_id, bounds);
if (r < 0 && r != -ENOENT) {
return r;
}
return RGWReplicaLogger::delete_bound(obj_name(bucket, shard_id, true), pool, daemon_id, purge_all, false);
}
int RGWReplicaBucketLogger::get_bounds(const rgw_bucket& bucket, int shard_id, RGWReplicaBounds& bounds) {
int r = RGWReplicaLogger::get_bounds(obj_name(bucket, shard_id, true), pool, bounds);
if (r != -ENOENT) {
return r;
}
r = convert_old_bounds(bucket, shard_id, bounds);
if (r < 0) {
return r;
}
return RGWReplicaLogger::get_bounds(obj_name(bucket, shard_id, true), pool, bounds);
}
int RGWReplicaBucketLogger::convert_old_bounds(const rgw_bucket& bucket, int shard_id, RGWReplicaBounds& bounds) {
string old_key = obj_name(bucket, shard_id, false);
string new_key = obj_name(bucket, shard_id, true);
/* couldn't find when indexed by instance, retry with old key by bucket name only */
int r = RGWReplicaLogger::get_bounds(old_key, pool, bounds);
if (r < 0) {
return r;
}
/* convert to new keys */
r = RGWReplicaLogger::write_bounds(new_key, pool, bounds);
if (r < 0) {
return r;
}
string daemon_id;
r = RGWReplicaLogger::delete_bound(old_key, pool, daemon_id, true, false); /* purge all */
if (r < 0) {
return r;
}
return 0;
}