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// vim: ts=8 sw=2 smarttab ft=cpp
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2022 Red Hat, Inc.
*
* 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 "common/dout.h"
#include "common/errno.h"
#include "rgw_zone.h"
#include "driver/rados/config/store.h"
#include "impl.h"
namespace rgw::rados {
// zonegroup oids
constexpr std::string_view zonegroup_names_oid_prefix = "zonegroups_names.";
constexpr std::string_view zonegroup_info_oid_prefix = "zonegroup_info.";
constexpr std::string_view default_zonegroup_info_oid = "default.zonegroup";
static std::string zonegroup_info_oid(std::string_view zonegroup_id)
{
return string_cat_reserve(zonegroup_info_oid_prefix, zonegroup_id);
}
static std::string zonegroup_name_oid(std::string_view zonegroup_id)
{
return string_cat_reserve(zonegroup_names_oid_prefix, zonegroup_id);
}
static std::string default_zonegroup_oid(const ceph::common::ConfigProxy& conf,
std::string_view realm_id)
{
const auto prefix = name_or_default(conf->rgw_default_zonegroup_info_oid,
default_zonegroup_info_oid);
return fmt::format("{}.{}", prefix, realm_id);
}
int RadosConfigStore::write_default_zonegroup_id(const DoutPrefixProvider* dpp,
optional_yield y,
bool exclusive,
std::string_view realm_id,
std::string_view zonegroup_id)
{
const auto& pool = impl->zonegroup_pool;
const auto oid = default_zonegroup_oid(dpp->get_cct()->_conf, realm_id);
const auto create = exclusive ? Create::MustNotExist : Create::MayExist;
RGWDefaultSystemMetaObjInfo default_info;
default_info.default_id = zonegroup_id;
return impl->write(dpp, y, pool, oid, create, default_info, nullptr);
}
int RadosConfigStore::read_default_zonegroup_id(const DoutPrefixProvider* dpp,
optional_yield y,
std::string_view realm_id,
std::string& zonegroup_id)
{
const auto& pool = impl->zonegroup_pool;
const auto oid = default_zonegroup_oid(dpp->get_cct()->_conf, realm_id);
RGWDefaultSystemMetaObjInfo default_info;
int r = impl->read(dpp, y, pool, oid, default_info, nullptr);
if (r >= 0) {
zonegroup_id = default_info.default_id;
}
return r;
}
int RadosConfigStore::delete_default_zonegroup_id(const DoutPrefixProvider* dpp,
optional_yield y,
std::string_view realm_id)
{
const auto& pool = impl->zonegroup_pool;
const auto oid = default_zonegroup_oid(dpp->get_cct()->_conf, realm_id);
return impl->remove(dpp, y, pool, oid, nullptr);
}
class RadosZoneGroupWriter : public sal::ZoneGroupWriter {
ConfigImpl* impl;
RGWObjVersionTracker objv;
std::string zonegroup_id;
std::string zonegroup_name;
public:
RadosZoneGroupWriter(ConfigImpl* impl, RGWObjVersionTracker objv,
std::string_view zonegroup_id,
std::string_view zonegroup_name)
: impl(impl), objv(std::move(objv)),
zonegroup_id(zonegroup_id), zonegroup_name(zonegroup_name)
{
}
int write(const DoutPrefixProvider* dpp, optional_yield y,
const RGWZoneGroup& info) override
{
if (zonegroup_id != info.get_id() || zonegroup_name != info.get_name()) {
return -EINVAL; // can't modify zonegroup id or name directly
}
const auto& pool = impl->zonegroup_pool;
const auto info_oid = zonegroup_info_oid(info.get_id());
return impl->write(dpp, y, pool, info_oid, Create::MustExist, info, &objv);
}
int rename(const DoutPrefixProvider* dpp, optional_yield y,
RGWZoneGroup& info, std::string_view new_name) override
{
if (zonegroup_id != info.get_id() || zonegroup_name != info.get_name()) {
return -EINVAL; // can't modify zonegroup id or name directly
}
if (new_name.empty()) {
ldpp_dout(dpp, 0) << "zonegroup cannot have an empty name" << dendl;
return -EINVAL;
}
const auto& pool = impl->zonegroup_pool;
const auto name = RGWNameToId{info.get_id()};
const auto info_oid = zonegroup_info_oid(info.get_id());
const auto old_oid = zonegroup_name_oid(info.get_name());
const auto new_oid = zonegroup_name_oid(new_name);
// link the new name
RGWObjVersionTracker new_objv;
new_objv.generate_new_write_ver(dpp->get_cct());
int r = impl->write(dpp, y, pool, new_oid, Create::MustNotExist,
name, &new_objv);
if (r < 0) {
return r;
}
// write the info with updated name
info.set_name(std::string{new_name});
r = impl->write(dpp, y, pool, info_oid, Create::MustExist, info, &objv);
if (r < 0) {
// on failure, unlink the new name
(void) impl->remove(dpp, y, pool, new_oid, &new_objv);
return r;
}
// unlink the old name
(void) impl->remove(dpp, y, pool, old_oid, nullptr);
zonegroup_name = new_name;
return 0;
}
int remove(const DoutPrefixProvider* dpp, optional_yield y) override
{
const auto& pool = impl->zonegroup_pool;
const auto info_oid = zonegroup_info_oid(zonegroup_id);
int r = impl->remove(dpp, y, pool, info_oid, &objv);
if (r < 0) {
return r;
}
const auto name_oid = zonegroup_name_oid(zonegroup_name);
(void) impl->remove(dpp, y, pool, name_oid, nullptr);
return 0;
}
}; // RadosZoneGroupWriter
int RadosConfigStore::create_zonegroup(const DoutPrefixProvider* dpp,
optional_yield y, bool exclusive,
const RGWZoneGroup& info,
std::unique_ptr<sal::ZoneGroupWriter>* writer)
{
if (info.get_id().empty()) {
ldpp_dout(dpp, 0) << "zonegroup cannot have an empty id" << dendl;
return -EINVAL;
}
if (info.get_name().empty()) {
ldpp_dout(dpp, 0) << "zonegroup cannot have an empty name" << dendl;
return -EINVAL;
}
const auto& pool = impl->zonegroup_pool;
const auto create = exclusive ? Create::MustNotExist : Create::MayExist;
// write the zonegroup info
const auto info_oid = zonegroup_info_oid(info.get_id());
RGWObjVersionTracker objv;
objv.generate_new_write_ver(dpp->get_cct());
int r = impl->write(dpp, y, pool, info_oid, create, info, &objv);
if (r < 0) {
return r;
}
// write the zonegroup name
const auto name_oid = zonegroup_name_oid(info.get_name());
const auto name = RGWNameToId{info.get_id()};
RGWObjVersionTracker name_objv;
name_objv.generate_new_write_ver(dpp->get_cct());
r = impl->write(dpp, y, pool, name_oid, create, name, &name_objv);
if (r < 0) {
(void) impl->remove(dpp, y, pool, info_oid, &objv);
return r;
}
if (writer) {
*writer = std::make_unique<RadosZoneGroupWriter>(
impl.get(), std::move(objv), info.get_id(), info.get_name());
}
return 0;
}
int RadosConfigStore::read_zonegroup_by_id(const DoutPrefixProvider* dpp,
optional_yield y,
std::string_view zonegroup_id,
RGWZoneGroup& info,
std::unique_ptr<sal::ZoneGroupWriter>* writer)
{
const auto& pool = impl->zonegroup_pool;
const auto info_oid = zonegroup_info_oid(zonegroup_id);
RGWObjVersionTracker objv;
int r = impl->read(dpp, y, pool, info_oid, info, &objv);
if (r < 0) {
return r;
}
if (writer) {
*writer = std::make_unique<RadosZoneGroupWriter>(
impl.get(), std::move(objv), info.get_id(), info.get_name());
}
return 0;
}
int RadosConfigStore::read_zonegroup_by_name(const DoutPrefixProvider* dpp,
optional_yield y,
std::string_view zonegroup_name,
RGWZoneGroup& info,
std::unique_ptr<sal::ZoneGroupWriter>* writer)
{
const auto& pool = impl->zonegroup_pool;
// look up zonegroup id by name
RGWNameToId name;
const auto name_oid = zonegroup_name_oid(zonegroup_name);
int r = impl->read(dpp, y, pool, name_oid, name, nullptr);
if (r < 0) {
return r;
}
const auto info_oid = zonegroup_info_oid(name.obj_id);
RGWObjVersionTracker objv;
r = impl->read(dpp, y, pool, info_oid, info, &objv);
if (r < 0) {
return r;
}
if (writer) {
*writer = std::make_unique<RadosZoneGroupWriter>(
impl.get(), std::move(objv), info.get_id(), info.get_name());
}
return 0;
}
int RadosConfigStore::read_default_zonegroup(const DoutPrefixProvider* dpp,
optional_yield y,
std::string_view realm_id,
RGWZoneGroup& info,
std::unique_ptr<sal::ZoneGroupWriter>* writer)
{
const auto& pool = impl->zonegroup_pool;
// read default zonegroup id
RGWDefaultSystemMetaObjInfo default_info;
const auto default_oid = default_zonegroup_oid(dpp->get_cct()->_conf, realm_id);
int r = impl->read(dpp, y, pool, default_oid, default_info, nullptr);
if (r < 0) {
return r;
}
const auto info_oid = zonegroup_info_oid(default_info.default_id);
RGWObjVersionTracker objv;
r = impl->read(dpp, y, pool, info_oid, info, &objv);
if (r < 0) {
return r;
}
if (writer) {
*writer = std::make_unique<RadosZoneGroupWriter>(
impl.get(), std::move(objv), info.get_id(), info.get_name());
}
return 0;
}
int RadosConfigStore::list_zonegroup_names(const DoutPrefixProvider* dpp,
optional_yield y,
const std::string& marker,
std::span<std::string> entries,
sal::ListResult<std::string>& result)
{
const auto& pool = impl->zonegroup_pool;
constexpr auto prefix = [] (std::string oid) -> std::string {
if (!oid.starts_with(zonegroup_names_oid_prefix)) {
return {};
}
return oid.substr(zonegroup_names_oid_prefix.size());
};
return impl->list(dpp, y, pool, marker, prefix, entries, result);
}
} // namespace rgw::rados
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