Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 921 insertions, 0 deletions

diff --git a/src/rgw/rgw_sal_dbstore.h b/src/rgw/rgw_sal_dbstore.h
new file mode 100644
index 000000000..3acdb4ba3
--- /dev/null
+++ b/src/rgw/rgw_sal_dbstore.h
@@ -0,0 +1,921 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab ft=cpp
+
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2021 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.
+ *
+ */
+
+#pragma once
+
+#include "rgw_sal_store.h"
+#include "rgw_oidc_provider.h"
+#include "rgw_role.h"
+#include "rgw_lc.h"
+#include "rgw_multi.h"
+
+#include "driver/dbstore/common/dbstore.h"
+#include "driver/dbstore/dbstore_mgr.h"
+
+namespace rgw { namespace sal {
+
+  class DBStore;
+
+class LCDBSerializer : public StoreLCSerializer {
+
+public:
+  LCDBSerializer(DBStore* store, const std::string& oid, const std::string& lock_name, const std::string& cookie) {}
+
+  virtual int try_lock(const DoutPrefixProvider *dpp, utime_t dur, optional_yield y) override { return 0; }
+  virtual int unlock() override {
+    return 0;
+  }
+};
+
+class DBLifecycle : public StoreLifecycle {
+  DBStore* store;
+
+public:
+  DBLifecycle(DBStore* _st) : store(_st) {}
+
+  using StoreLifecycle::get_entry;
+  virtual int get_entry(const std::string& oid, const std::string& marker, std::unique_ptr<LCEntry>* entry) override;
+  virtual int get_next_entry(const std::string& oid, const std::string& marker, std::unique_ptr<LCEntry>* entry) override;
+  virtual int set_entry(const std::string& oid, LCEntry& entry) override;
+  virtual int list_entries(const std::string& oid, const std::string& marker,
+			   uint32_t max_entries,
+			   std::vector<std::unique_ptr<LCEntry>>& entries) override;
+  virtual int rm_entry(const std::string& oid, LCEntry& entry) override;
+  virtual int get_head(const std::string& oid, std::unique_ptr<LCHead>* head) override;
+  virtual int put_head(const std::string& oid, LCHead& head) override;
+  virtual std::unique_ptr<LCSerializer> get_serializer(const std::string& lock_name,
+						       const std::string& oid,
+						       const std::string& cookie) override;
+};
+
+class DBNotification : public StoreNotification {
+protected:
+  public:
+  DBNotification(Object* _obj, Object* _src_obj, rgw::notify::EventType _type)
+    : StoreNotification(_obj, _src_obj, _type) {}
+    ~DBNotification() = default;
+
+    virtual int publish_reserve(const DoutPrefixProvider *dpp, RGWObjTags* obj_tags = nullptr) override { return 0;}
+    virtual int publish_commit(const DoutPrefixProvider* dpp, uint64_t size,
+			       const ceph::real_time& mtime, const std::string& etag, const std::string& version) override { return 0; }
+};
+
+  class DBUser : public StoreUser {
+    private:
+      DBStore *store;
+
+    public:
+      DBUser(DBStore *_st, const rgw_user& _u) : StoreUser(_u), store(_st) { }
+      DBUser(DBStore *_st, const RGWUserInfo& _i) : StoreUser(_i), store(_st) { }
+      DBUser(DBStore *_st) : store(_st) { }
+      DBUser(DBUser& _o) = default;
+      DBUser() {}
+
+      virtual std::unique_ptr<User> clone() override {
+        return std::unique_ptr<User>(new DBUser(*this));
+      }
+      int list_buckets(const DoutPrefixProvider *dpp, const std::string& marker, const std::string& end_marker,
+          uint64_t max, bool need_stats, BucketList& buckets, optional_yield y) override;
+      virtual int create_bucket(const DoutPrefixProvider* dpp,
+          const rgw_bucket& b,
+          const std::string& zonegroup_id,
+          rgw_placement_rule& placement_rule,
+          std::string& swift_ver_location,
+          const RGWQuotaInfo* pquota_info,
+          const RGWAccessControlPolicy& policy,
+          Attrs& attrs,
+          RGWBucketInfo& info,
+          obj_version& ep_objv,
+          bool exclusive,
+          bool obj_lock_enabled,
+          bool* existed,
+          req_info& req_info,
+          std::unique_ptr<Bucket>* bucket,
+          optional_yield y) override;
+      virtual int read_attrs(const DoutPrefixProvider* dpp, optional_yield y) override;
+      virtual int read_stats(const DoutPrefixProvider *dpp,
+          optional_yield y, RGWStorageStats* stats,
+          ceph::real_time *last_stats_sync = nullptr,
+          ceph::real_time *last_stats_update = nullptr) override;
+      virtual int read_stats_async(const DoutPrefixProvider *dpp, RGWGetUserStats_CB* cb) override;
+      virtual int complete_flush_stats(const DoutPrefixProvider *dpp, optional_yield y) override;
+      virtual int read_usage(const DoutPrefixProvider *dpp, uint64_t start_epoch, uint64_t end_epoch, uint32_t max_entries,
+          bool* is_truncated, RGWUsageIter& usage_iter,
+          std::map<rgw_user_bucket, rgw_usage_log_entry>& usage) override;
+      virtual int trim_usage(const DoutPrefixProvider *dpp, uint64_t start_epoch, uint64_t end_epoch) override;
+
+      /* Placeholders */
+      virtual int merge_and_store_attrs(const DoutPrefixProvider* dpp, Attrs& new_attrs, optional_yield y) override;
+      virtual int load_user(const DoutPrefixProvider* dpp, optional_yield y) override;
+      virtual int store_user(const DoutPrefixProvider* dpp, optional_yield y, bool exclusive, RGWUserInfo* old_info = nullptr) override;
+      virtual int remove_user(const DoutPrefixProvider* dpp, optional_yield y) override;
+      virtual int verify_mfa(const std::string& mfa_str, bool* verified, const DoutPrefixProvider* dpp, optional_yield y) override;
+
+      friend class DBBucket;
+  };
+
+  class DBBucket : public StoreBucket {
+    private:
+      DBStore *store;
+      RGWAccessControlPolicy acls;
+
+    public:
+      DBBucket(DBStore *_st)
+        : store(_st),
+        acls() {
+        }
+
+      DBBucket(DBStore *_st, User* _u)
+        : StoreBucket(_u),
+        store(_st),
+        acls() {
+        }
+
+      DBBucket(DBStore *_st, const rgw_bucket& _b)
+        : StoreBucket(_b),
+        store(_st),
+        acls() {
+        }
+
+      DBBucket(DBStore *_st, const RGWBucketEnt& _e)
+        : StoreBucket(_e),
+        store(_st),
+        acls() {
+        }
+
+      DBBucket(DBStore *_st, const RGWBucketInfo& _i)
+        : StoreBucket(_i),
+        store(_st),
+        acls() {
+        }
+
+      DBBucket(DBStore *_st, const rgw_bucket& _b, User* _u)
+        : StoreBucket(_b, _u),
+        store(_st),
+        acls() {
+        }
+
+      DBBucket(DBStore *_st, const RGWBucketEnt& _e, User* _u)
+        : StoreBucket(_e, _u),
+        store(_st),
+        acls() {
+        }
+
+      DBBucket(DBStore *_st, const RGWBucketInfo& _i, User* _u)
+        : StoreBucket(_i, _u),
+        store(_st),
+        acls() {
+        }
+
+      ~DBBucket() { }
+
+      virtual std::unique_ptr<Object> get_object(const rgw_obj_key& k) override;
+      virtual int list(const DoutPrefixProvider *dpp, ListParams&, int, ListResults&, optional_yield y) override;
+      virtual int remove_bucket(const DoutPrefixProvider *dpp, bool delete_children, bool forward_to_master, req_info* req_info, optional_yield y) override;
+      virtual int remove_bucket_bypass_gc(int concurrent_max, bool
+					keep_index_consistent,
+					optional_yield y, const
+					DoutPrefixProvider *dpp) override;
+      virtual RGWAccessControlPolicy& get_acl(void) override { return acls; }
+      virtual int set_acl(const DoutPrefixProvider *dpp, RGWAccessControlPolicy& acl, optional_yield y) override;
+      virtual int load_bucket(const DoutPrefixProvider *dpp, optional_yield y, bool get_stats = false) override;
+      virtual int read_stats(const DoutPrefixProvider *dpp,
+			     const bucket_index_layout_generation& idx_layout,
+			     int shard_id,
+          std::string *bucket_ver, std::string *master_ver,
+          std::map<RGWObjCategory, RGWStorageStats>& stats,
+          std::string *max_marker = nullptr,
+          bool *syncstopped = nullptr) override;
+      virtual int read_stats_async(const DoutPrefixProvider *dpp, const bucket_index_layout_generation& idx_layout, int shard_id, RGWGetBucketStats_CB* ctx) override;
+      virtual int sync_user_stats(const DoutPrefixProvider *dpp, optional_yield y) override;
+      virtual int update_container_stats(const DoutPrefixProvider *dpp) override;
+      virtual int check_bucket_shards(const DoutPrefixProvider *dpp) override;
+      virtual int chown(const DoutPrefixProvider *dpp, User& new_user, optional_yield y) override;
+      virtual int put_info(const DoutPrefixProvider *dpp, bool exclusive, ceph::real_time mtime) override;
+      virtual bool is_owner(User* user) override;
+      virtual int check_empty(const DoutPrefixProvider *dpp, optional_yield y) override;
+      virtual int check_quota(const DoutPrefixProvider *dpp, RGWQuota& quota, uint64_t obj_size, optional_yield y, bool check_size_only = false) override;
+      virtual int merge_and_store_attrs(const DoutPrefixProvider *dpp, Attrs& attrs, optional_yield y) override;
+      virtual int try_refresh_info(const DoutPrefixProvider *dpp, ceph::real_time *pmtime) override;
+      virtual int read_usage(const DoutPrefixProvider *dpp, uint64_t start_epoch, uint64_t end_epoch, uint32_t max_entries,
+          bool *is_truncated, RGWUsageIter& usage_iter,
+          std::map<rgw_user_bucket, rgw_usage_log_entry>& usage) override;
+      virtual int trim_usage(const DoutPrefixProvider *dpp, uint64_t start_epoch, uint64_t end_epoch) override;
+      virtual int remove_objs_from_index(const DoutPrefixProvider *dpp, std::list<rgw_obj_index_key>& objs_to_unlink) override;
+      virtual int check_index(const DoutPrefixProvider *dpp, std::map<RGWObjCategory, RGWStorageStats>& existing_stats, std::map<RGWObjCategory, RGWStorageStats>& calculated_stats) override;
+      virtual int rebuild_index(const DoutPrefixProvider *dpp) override;
+      virtual int set_tag_timeout(const DoutPrefixProvider *dpp, uint64_t timeout) override;
+      virtual int purge_instance(const DoutPrefixProvider *dpp) override;
+      virtual std::unique_ptr<Bucket> clone() override {
+        return std::make_unique<DBBucket>(*this);
+      }
+      virtual std::unique_ptr<MultipartUpload> get_multipart_upload(
+				const std::string& oid, std::optional<std::string> upload_id,
+				ACLOwner owner={}, ceph::real_time mtime=ceph::real_clock::now()) override;
+      virtual int list_multiparts(const DoutPrefixProvider *dpp,
+				const std::string& prefix,
+				std::string& marker,
+				const std::string& delim,
+				const int& max_uploads,
+				std::vector<std::unique_ptr<MultipartUpload>>& uploads,
+				std::map<std::string, bool> *common_prefixes,
+				bool *is_truncated) override;
+      virtual int abort_multiparts(const DoutPrefixProvider* dpp,
+				   CephContext* cct) override;
+
+      friend class DBStore;
+  };
+
+  class DBPlacementTier: public StorePlacementTier {
+    DBStore* store;
+    RGWZoneGroupPlacementTier tier;
+  public:
+    DBPlacementTier(DBStore* _store, const RGWZoneGroupPlacementTier& _tier) : store(_store), tier(_tier) {}
+    virtual ~DBPlacementTier() = default;
+
+    virtual const std::string& get_tier_type() { return tier.tier_type; }
+    virtual const std::string& get_storage_class() { return tier.storage_class; }
+    virtual bool retain_head_object() { return tier.retain_head_object; }
+    RGWZoneGroupPlacementTier& get_rt() { return tier; }
+  };
+
+  class DBZoneGroup : public StoreZoneGroup {
+    DBStore* store;
+    std::unique_ptr<RGWZoneGroup> group;
+    std::string empty;
+  public:
+    DBZoneGroup(DBStore* _store, std::unique_ptr<RGWZoneGroup> _group) : store(_store), group(std::move(_group)) {}
+    virtual ~DBZoneGroup() = default;
+
+    virtual const std::string& get_id() const override { return group->get_id(); };
+    virtual const std::string& get_name() const override { return group->get_name(); };
+    virtual int equals(const std::string& other_zonegroup) const override {
+      return group->equals(other_zonegroup);
+    };
+    /** Get the endpoint from zonegroup, or from master zone if not set */
+    virtual const std::string& get_endpoint() const override;
+    virtual bool placement_target_exists(std::string& target) const override;
+    virtual bool is_master_zonegroup() const override {
+      return group->is_master_zonegroup();
+    };
+    virtual const std::string& get_api_name() const override { return group->api_name; };
+    virtual void get_placement_target_names(std::set<std::string>& names) const override;
+    virtual const std::string& get_default_placement_name() const override {
+      return group->default_placement.name; };
+    virtual int get_hostnames(std::list<std::string>& names) const override {
+      names = group->hostnames;
+      return 0;
+    };
+    virtual int get_s3website_hostnames(std::list<std::string>& names) const override {
+      names = group->hostnames_s3website;
+      return 0;
+    };
+    virtual int get_zone_count() const override {
+      /* currently only 1 zone supported */
+      return 1;
+    }
+    virtual int get_placement_tier(const rgw_placement_rule& rule,
+				   std::unique_ptr<PlacementTier>* tier) {
+      return -1;
+    }
+    virtual int get_zone_by_id(const std::string& id, std::unique_ptr<Zone>* zone) override {
+      return -1;
+    }
+    virtual int get_zone_by_name(const std::string& name, std::unique_ptr<Zone>* zone) override {
+      return -1;
+    }
+    virtual int list_zones(std::list<std::string>& zone_ids) override {
+      zone_ids.clear();
+      return 0;
+    }
+    bool supports(std::string_view feature) const override {
+      return group->supports(feature);
+    }
+    virtual std::unique_ptr<ZoneGroup> clone() override {
+      std::unique_ptr<RGWZoneGroup>zg = std::make_unique<RGWZoneGroup>(*group.get());
+      return std::make_unique<DBZoneGroup>(store, std::move(zg));
+    }
+  };
+
+  class DBZone : public StoreZone {
+    protected:
+      DBStore* store;
+      RGWRealm *realm{nullptr};
+      DBZoneGroup *zonegroup{nullptr};
+      RGWZone *zone_public_config{nullptr}; /* external zone params, e.g., entrypoints, log flags, etc. */
+      RGWZoneParams *zone_params{nullptr}; /* internal zone params, e.g., rados pools */
+      RGWPeriod *current_period{nullptr};
+
+    public:
+      DBZone(DBStore* _store) : store(_store) {
+	realm = new RGWRealm();
+        zonegroup = new DBZoneGroup(store, std::make_unique<RGWZoneGroup>());
+        zone_public_config = new RGWZone();
+        zone_params = new RGWZoneParams();
+        current_period = new RGWPeriod();
+
+        // XXX: only default and STANDARD supported for now
+        RGWZonePlacementInfo info;
+        RGWZoneStorageClasses sc;
+        sc.set_storage_class("STANDARD", nullptr, nullptr);
+        info.storage_classes = sc;
+        zone_params->placement_pools["default"] = info;
+      }
+      ~DBZone() {
+	delete realm;
+	delete zonegroup;
+	delete zone_public_config;
+	delete zone_params;
+	delete current_period;
+      }
+
+      virtual std::unique_ptr<Zone> clone() override {
+	return std::make_unique<DBZone>(store);
+      }
+      virtual ZoneGroup& get_zonegroup() override;
+      const RGWZoneParams& get_rgw_params();
+      virtual const std::string& get_id() override;
+      virtual const std::string& get_name() const override;
+      virtual bool is_writeable() override;
+      virtual bool get_redirect_endpoint(std::string* endpoint) override;
+      virtual bool has_zonegroup_api(const std::string& api) const override;
+      virtual const std::string& get_current_period_id() override;
+      virtual const RGWAccessKey& get_system_key() override;
+      virtual const std::string& get_realm_name() override;
+      virtual const std::string& get_realm_id() override;
+      virtual const std::string_view get_tier_type() override { return "rgw"; }
+      virtual RGWBucketSyncPolicyHandlerRef get_sync_policy_handler() override;
+  };
+
+  class DBLuaManager : public StoreLuaManager {
+    DBStore* store;
+
+    public:
+    DBLuaManager(DBStore* _s) : store(_s)
+    {
+    }
+    virtual ~DBLuaManager() = default;
+
+    /** Get a script named with the given key from the backing store */
+    virtual int get_script(const DoutPrefixProvider* dpp, optional_yield y, const std::string& key, std::string& script) override;
+    /** Put a script named with the given key to the backing store */
+    virtual int put_script(const DoutPrefixProvider* dpp, optional_yield y, const std::string& key, const std::string& script) override;
+    /** Delete a script named with the given key from the backing store */
+    virtual int del_script(const DoutPrefixProvider* dpp, optional_yield y, const std::string& key) override;
+    /** Add a lua package */
+    virtual int add_package(const DoutPrefixProvider* dpp, optional_yield y, const std::string& package_name) override;
+    /** Remove a lua package */
+    virtual int remove_package(const DoutPrefixProvider* dpp, optional_yield y, const std::string& package_name) override;
+    /** List lua packages */
+    virtual int list_packages(const DoutPrefixProvider* dpp, optional_yield y, rgw::lua::packages_t& packages) override;
+  };
+
+  class DBOIDCProvider : public RGWOIDCProvider {
+    DBStore* store;
+    public:
+    DBOIDCProvider(DBStore* _store) : store(_store) {}
+    ~DBOIDCProvider() = default;
+
+    virtual int store_url(const DoutPrefixProvider *dpp, const std::string& url, bool exclusive, optional_yield y) override { return 0; }
+    virtual int read_url(const DoutPrefixProvider *dpp, const std::string& url, const std::string& tenant) override { return 0; }
+    virtual int delete_obj(const DoutPrefixProvider *dpp, optional_yield y) override { return 0;}
+
+    void encode(bufferlist& bl) const {
+      RGWOIDCProvider::encode(bl);
+    }
+    void decode(bufferlist::const_iterator& bl) {
+      RGWOIDCProvider::decode(bl);
+    }
+  };
+
+  /*
+   * For multipart upload, below is the process flow -
+   *
+   * MultipartUpload::Init - create head object of meta obj (src_obj_name + "." + upload_id)
+   *                     [ Meta object stores all the parts upload info]
+   * MultipartWriter::process - create all data/tail objects with obj_name same as
+   *                        meta obj (so that they can all be identified & deleted
+   *                        during abort)
+   * MultipartUpload::Abort - Just delete meta obj .. that will indirectly delete all the
+   *                     uploads associated with that upload id / meta obj so far.
+   * MultipartUpload::Complete - create head object of the original object (if not exists) &
+   *                     rename all data/tail objects to orig object name and update
+   *                     metadata of the orig object.
+   */
+  class DBMultipartPart : public StoreMultipartPart {
+  protected:
+    RGWUploadPartInfo info; /* XXX: info contains manifest also which is not needed */
+
+  public:
+    DBMultipartPart() = default;
+    virtual ~DBMultipartPart() = default;
+
+    virtual RGWUploadPartInfo& get_info() { return info; }
+    virtual void set_info(const RGWUploadPartInfo& _info) { info = _info; }
+    virtual uint32_t get_num() { return info.num; }
+    virtual uint64_t get_size() { return info.accounted_size; }
+    virtual const std::string& get_etag() { return info.etag; }
+    virtual ceph::real_time& get_mtime() { return info.modified; }
+
+  };
+
+  class DBMPObj {
+    std::string oid; // object name
+    std::string upload_id;
+    std::string meta; // multipart meta object = <oid>.<upload_id>
+  public:
+    DBMPObj() {}
+    DBMPObj(const std::string& _oid, const std::string& _upload_id) {
+      init(_oid, _upload_id, _upload_id);
+    }
+    DBMPObj(const std::string& _oid, std::optional<std::string> _upload_id) {
+      if (_upload_id) {
+        init(_oid, *_upload_id, *_upload_id);
+      } else {
+        from_meta(_oid);
+      }
+    }
+    void init(const std::string& _oid, const std::string& _upload_id) {
+      init(_oid, _upload_id, _upload_id);
+    }
+    void init(const std::string& _oid, const std::string& _upload_id, const std::string& part_unique_str) {
+      if (_oid.empty()) {
+        clear();
+        return;
+      }
+      oid = _oid;
+      upload_id = _upload_id;
+      meta = oid + "." + upload_id;
+    }
+    const std::string& get_upload_id() const {
+      return upload_id;
+    }
+    const std::string& get_key() const {
+      return oid;
+    }
+    const std::string& get_meta() const { return meta; }
+    bool from_meta(const std::string& meta) {
+      int end_pos = meta.length();
+      int mid_pos = meta.rfind('.', end_pos - 1); // <key>.<upload_id>
+      if (mid_pos < 0)
+        return false;
+      oid = meta.substr(0, mid_pos);
+      upload_id = meta.substr(mid_pos + 1, end_pos - mid_pos - 1);
+      init(oid, upload_id, upload_id);
+      return true;
+    }
+    void clear() {
+      oid = "";
+      meta = "";
+      upload_id = "";
+    }
+  };
+
+  class DBMultipartUpload : public StoreMultipartUpload {
+    DBStore* store;
+    DBMPObj mp_obj;
+    ACLOwner owner;
+    ceph::real_time mtime;
+    rgw_placement_rule placement;
+
+  public:
+    DBMultipartUpload(DBStore* _store, Bucket* _bucket, const std::string& oid, std::optional<std::string> upload_id, ACLOwner _owner, ceph::real_time _mtime) : StoreMultipartUpload(_bucket), store(_store), mp_obj(oid, upload_id), owner(_owner), mtime(_mtime) {}
+    virtual ~DBMultipartUpload() = default;
+
+    virtual const std::string& get_meta() const { return mp_obj.get_meta(); }
+    virtual const std::string& get_key() const { return mp_obj.get_key(); }
+    virtual const std::string& get_upload_id() const { return mp_obj.get_upload_id(); }
+    virtual const ACLOwner& get_owner() const override { return owner; }
+    virtual ceph::real_time& get_mtime() { return mtime; }
+    virtual std::unique_ptr<rgw::sal::Object> get_meta_obj() override;
+    virtual int init(const DoutPrefixProvider* dpp, optional_yield y, ACLOwner& owner, rgw_placement_rule& dest_placement, rgw::sal::Attrs& attrs) override;
+    virtual int list_parts(const DoutPrefixProvider* dpp, CephContext* cct,
+			 int num_parts, int marker,
+			 int* next_marker, bool* truncated,
+			 bool assume_unsorted = false) override;
+    virtual int abort(const DoutPrefixProvider* dpp, CephContext* cct) override;
+    virtual int complete(const DoutPrefixProvider* dpp,
+		       optional_yield y, CephContext* cct,
+		       std::map<int, std::string>& part_etags,
+		       std::list<rgw_obj_index_key>& remove_objs,
+		       uint64_t& accounted_size, bool& compressed,
+		       RGWCompressionInfo& cs_info, off_t& ofs,
+		       std::string& tag, ACLOwner& owner,
+		       uint64_t olh_epoch,
+		       rgw::sal::Object* target_obj) override;
+    virtual int get_info(const DoutPrefixProvider *dpp, optional_yield y, rgw_placement_rule** rule, rgw::sal::Attrs* attrs = nullptr) override;
+    virtual std::unique_ptr<Writer> get_writer(const DoutPrefixProvider *dpp,
+			  optional_yield y,
+			  rgw::sal::Object* obj,
+			  const rgw_user& owner,
+			  const rgw_placement_rule *ptail_placement_rule,
+			  uint64_t part_num,
+			  const std::string& part_num_str) override;
+  };
+
+  class DBObject : public StoreObject {
+    private:
+      DBStore* store;
+      RGWAccessControlPolicy acls;
+
+    public:
+      struct DBReadOp : public ReadOp {
+        private:
+          DBObject* source;
+          RGWObjectCtx* rctx;
+          DB::Object op_target;
+          DB::Object::Read parent_op;
+
+        public:
+          DBReadOp(DBObject *_source, RGWObjectCtx *_rctx);
+
+          virtual int prepare(optional_yield y, const DoutPrefixProvider* dpp) override;
+
+	  /*
+	   * Both `read` and `iterate` read up through index `end`
+	   * *inclusive*. The number of bytes that could be returned is
+	   * `end - ofs + 1`.
+	   */
+	  virtual int read(int64_t ofs, int64_t end, bufferlist& bl,
+			   optional_yield y,
+			   const DoutPrefixProvider* dpp) override;
+	  virtual int iterate(const DoutPrefixProvider* dpp, int64_t ofs,
+			      int64_t end, RGWGetDataCB* cb,
+			      optional_yield y) override;
+
+	  virtual int get_attr(const DoutPrefixProvider* dpp, const char* name, bufferlist& dest, optional_yield y) override;
+      };
+
+      struct DBDeleteOp : public DeleteOp {
+        private:
+          DBObject* source;
+          DB::Object op_target;
+          DB::Object::Delete parent_op;
+
+        public:
+          DBDeleteOp(DBObject* _source);
+
+          virtual int delete_obj(const DoutPrefixProvider* dpp, optional_yield y) override;
+      };
+
+      DBObject() = default;
+
+      DBObject(DBStore *_st, const rgw_obj_key& _k)
+        : StoreObject(_k),
+        store(_st),
+        acls() {}
+
+      DBObject(DBStore *_st, const rgw_obj_key& _k, Bucket* _b)
+        : StoreObject(_k, _b),
+        store(_st),
+        acls() {}
+
+      DBObject(DBObject& _o) = default;
+
+      virtual int delete_object(const DoutPrefixProvider* dpp,
+          optional_yield y,
+          bool prevent_versioning = false) override;
+      virtual int delete_obj_aio(const DoutPrefixProvider* dpp, RGWObjState* astate, Completions* aio,
+          bool keep_index_consistent, optional_yield y) override;
+      virtual int copy_object(User* user,
+          req_info* info, const rgw_zone_id& source_zone,
+          rgw::sal::Object* dest_object, rgw::sal::Bucket* dest_bucket,
+          rgw::sal::Bucket* src_bucket,
+          const rgw_placement_rule& dest_placement,
+          ceph::real_time* src_mtime, ceph::real_time* mtime,
+          const ceph::real_time* mod_ptr, const ceph::real_time* unmod_ptr,
+          bool high_precision_time,
+          const char* if_match, const char* if_nomatch,
+          AttrsMod attrs_mod, bool copy_if_newer, Attrs& attrs,
+          RGWObjCategory category, uint64_t olh_epoch,
+          boost::optional<ceph::real_time> delete_at,
+          std::string* version_id, std::string* tag, std::string* etag,
+          void (*progress_cb)(off_t, void *), void* progress_data,
+          const DoutPrefixProvider* dpp, optional_yield y) override;
+      virtual RGWAccessControlPolicy& get_acl(void) override { return acls; }
+      virtual int set_acl(const RGWAccessControlPolicy& acl) override { acls = acl; return 0; }
+
+      virtual int get_obj_state(const DoutPrefixProvider* dpp, RGWObjState **state, optional_yield y, bool follow_olh = true) override;
+      virtual int set_obj_attrs(const DoutPrefixProvider* dpp, Attrs* setattrs, Attrs* delattrs, optional_yield y) override;
+      virtual int get_obj_attrs(optional_yield y, const DoutPrefixProvider* dpp, rgw_obj* target_obj = NULL) override;
+      virtual int modify_obj_attrs(const char* attr_name, bufferlist& attr_val, optional_yield y, const DoutPrefixProvider* dpp) override;
+      virtual int delete_obj_attrs(const DoutPrefixProvider* dpp, const char* attr_name, optional_yield y) override;
+      virtual bool is_expired() override;
+      virtual void gen_rand_obj_instance_name() override;
+      virtual std::unique_ptr<Object> clone() override {
+        return std::unique_ptr<Object>(new DBObject(*this));
+      }
+      virtual std::unique_ptr<MPSerializer> get_serializer(const DoutPrefixProvider *dpp,
+							   const std::string& lock_name) override;
+      virtual int transition(Bucket* bucket,
+          const rgw_placement_rule& placement_rule,
+          const real_time& mtime,
+          uint64_t olh_epoch,
+          const DoutPrefixProvider* dpp,
+          optional_yield y) override;
+      virtual bool placement_rules_match(rgw_placement_rule& r1, rgw_placement_rule& r2) override;
+      virtual int dump_obj_layout(const DoutPrefixProvider *dpp, optional_yield y, Formatter* f) override;
+
+      /* Swift versioning */
+      virtual int swift_versioning_restore(bool& restored,
+          const DoutPrefixProvider* dpp) override;
+      virtual int swift_versioning_copy(const DoutPrefixProvider* dpp,
+          optional_yield y) override;
+
+      /* OPs */
+      virtual std::unique_ptr<ReadOp> get_read_op() override;
+      virtual std::unique_ptr<DeleteOp> get_delete_op() override;
+
+      /* OMAP */
+      virtual int omap_get_vals(const DoutPrefixProvider *dpp, const std::string& marker, uint64_t count,
+          std::map<std::string, bufferlist> *m,
+          bool* pmore, optional_yield y) override;
+      virtual int omap_get_all(const DoutPrefixProvider *dpp, std::map<std::string, bufferlist> *m,
+          optional_yield y) override;
+      virtual int omap_get_vals_by_keys(const DoutPrefixProvider *dpp, const std::string& oid,
+          const std::set<std::string>& keys,
+          Attrs* vals) override;
+      virtual int omap_set_val_by_key(const DoutPrefixProvider *dpp, const std::string& key, bufferlist& val,
+          bool must_exist, optional_yield y) override;
+      virtual int chown(User& new_user, const DoutPrefixProvider* dpp, optional_yield y) override;
+    private:
+      int read_attrs(const DoutPrefixProvider* dpp, DB::Object::Read &read_op, optional_yield y, rgw_obj* target_obj = nullptr);
+  };
+
+  class MPDBSerializer : public StoreMPSerializer {
+
+  public:
+    MPDBSerializer(const DoutPrefixProvider *dpp, DBStore* store, DBObject* obj, const std::string& lock_name) {}
+
+    virtual int try_lock(const DoutPrefixProvider *dpp, utime_t dur, optional_yield y) override {return 0; }
+    virtual int unlock() override { return 0;}
+  };
+
+  class DBAtomicWriter : public StoreWriter {
+    protected:
+    rgw::sal::DBStore* store;
+    const rgw_user& owner;
+	const rgw_placement_rule *ptail_placement_rule;
+	uint64_t olh_epoch;
+	const std::string& unique_tag;
+    DBObject obj;
+    DB::Object op_target;
+    DB::Object::Write parent_op;
+    uint64_t total_data_size = 0; /* for total data being uploaded */
+    bufferlist head_data;
+    bufferlist tail_part_data;
+    uint64_t tail_part_offset;
+    uint64_t tail_part_size = 0; /* corresponds to each tail part being
+                                  written to dbstore */
+
+    public:
+    DBAtomicWriter(const DoutPrefixProvider *dpp,
+	    	    optional_yield y,
+		        rgw::sal::Object* obj,
+		        DBStore* _store,
+    		    const rgw_user& _owner,
+	    	    const rgw_placement_rule *_ptail_placement_rule,
+		        uint64_t _olh_epoch,
+		        const std::string& _unique_tag);
+    ~DBAtomicWriter() = default;
+
+    // prepare to start processing object data
+    virtual int prepare(optional_yield y) override;
+
+    // Process a bufferlist
+    virtual int process(bufferlist&& data, uint64_t offset) override;
+
+    // complete the operation and make its result visible to clients
+    virtual int complete(size_t accounted_size, const std::string& etag,
+                         ceph::real_time *mtime, ceph::real_time set_mtime,
+                         std::map<std::string, bufferlist>& attrs,
+                         ceph::real_time delete_at,
+                         const char *if_match, const char *if_nomatch,
+                         const std::string *user_data,
+                         rgw_zone_set *zones_trace, bool *canceled,
+                         optional_yield y) override;
+  };
+
+  class DBMultipartWriter : public StoreWriter {
+  protected:
+    rgw::sal::DBStore* store;
+    const rgw_user& owner;
+	const rgw_placement_rule *ptail_placement_rule;
+	uint64_t olh_epoch;
+    rgw::sal::Object* head_obj;
+    std::string upload_id;
+    int part_num;
+    std::string oid; /* object->name() + "." + "upload_id" + "." + part_num */
+    std::unique_ptr<rgw::sal::Object> meta_obj;
+    DB::Object op_target;
+    DB::Object::Write parent_op;
+    std::string part_num_str;
+    uint64_t total_data_size = 0; /* for total data being uploaded */
+    bufferlist head_data;
+    bufferlist tail_part_data;
+    uint64_t tail_part_offset;
+    uint64_t tail_part_size = 0; /* corresponds to each tail part being
+                                  written to dbstore */
+
+public:
+    DBMultipartWriter(const DoutPrefixProvider *dpp,
+		       optional_yield y, MultipartUpload* upload,
+		       rgw::sal::Object* obj,
+		       DBStore* _store,
+		       const rgw_user& owner,
+		       const rgw_placement_rule *ptail_placement_rule,
+		       uint64_t part_num, const std::string& part_num_str);
+    ~DBMultipartWriter() = default;
+
+    // prepare to start processing object data
+    virtual int prepare(optional_yield y) override;
+
+    // Process a bufferlist
+    virtual int process(bufferlist&& data, uint64_t offset) override;
+
+    // complete the operation and make its result visible to clients
+    virtual int complete(size_t accounted_size, const std::string& etag,
+                       ceph::real_time *mtime, ceph::real_time set_mtime,
+                       std::map<std::string, bufferlist>& attrs,
+                       ceph::real_time delete_at,
+                       const char *if_match, const char *if_nomatch,
+                       const std::string *user_data,
+                       rgw_zone_set *zones_trace, bool *canceled,
+                       optional_yield y) override;
+  };
+
+  class DBStore : public StoreDriver {
+    private:
+      /* DBStoreManager is used in case multiple
+       * connections are needed one for each tenant.
+       */
+      DBStoreManager *dbsm;
+      /* default db (single connection). If needed
+       * multiple db handles (for eg., one for each tenant),
+       * use dbsm->getDB(tenant) */
+      DB *db;
+      DBZone zone;
+      RGWSyncModuleInstanceRef sync_module;
+      RGWLC* lc;
+      CephContext *cct;
+      const DoutPrefixProvider *dpp;
+      bool use_lc_thread;
+
+    public:
+      DBStore(): dbsm(nullptr), zone(this), cct(nullptr), dpp(nullptr),
+                 use_lc_thread(false) {}
+      ~DBStore() { delete dbsm; }
+
+      DBStore& set_run_lc_thread(bool _use_lc_thread) {
+        use_lc_thread = _use_lc_thread;
+        return *this;
+      }
+
+      virtual int initialize(CephContext *cct, const DoutPrefixProvider *dpp) override;
+
+      virtual const std::string get_name() const override {
+        return "dbstore";
+      }
+
+      virtual std::unique_ptr<User> get_user(const rgw_user& u) override;
+      virtual int get_user_by_access_key(const DoutPrefixProvider *dpp, const std::string& key, optional_yield y, std::unique_ptr<User>* user) override;
+      virtual int get_user_by_email(const DoutPrefixProvider *dpp, const std::string& email, optional_yield y, std::unique_ptr<User>* user) override;
+      virtual int get_user_by_swift(const DoutPrefixProvider *dpp, const std::string& user_str, optional_yield y, std::unique_ptr<User>* user) override;
+      virtual std::unique_ptr<Object> get_object(const rgw_obj_key& k) override;
+      virtual std::string get_cluster_id(const DoutPrefixProvider* dpp, optional_yield y);
+      virtual int get_bucket(const DoutPrefixProvider *dpp, User* u, const rgw_bucket& b, std::unique_ptr<Bucket>* bucket, optional_yield y) override;
+      virtual int get_bucket(User* u, const RGWBucketInfo& i, std::unique_ptr<Bucket>* bucket) override;
+      virtual int get_bucket(const DoutPrefixProvider *dpp, User* u, const std::string& tenant, const std::string&name, std::unique_ptr<Bucket>* bucket, optional_yield y) override;
+      virtual bool is_meta_master() override;
+      virtual int forward_request_to_master(const DoutPrefixProvider *dpp, User* user, obj_version* objv,
+          bufferlist& in_data, JSONParser *jp, req_info& info,
+          optional_yield y) override;
+      virtual int forward_iam_request_to_master(const DoutPrefixProvider *dpp, const RGWAccessKey& key, obj_version* objv,
+					     bufferlist& in_data,
+					     RGWXMLDecoder::XMLParser* parser, req_info& info,
+					     optional_yield y) override;
+      virtual Zone* get_zone() { return &zone; }
+      virtual std::string zone_unique_id(uint64_t unique_num) override;
+      virtual std::string zone_unique_trans_id(const uint64_t unique_num) override;
+      virtual int get_zonegroup(const std::string& id, std::unique_ptr<ZoneGroup>* zonegroup) override;
+      virtual int list_all_zones(const DoutPrefixProvider* dpp, std::list<std::string>& zone_ids) override;
+      virtual int cluster_stat(RGWClusterStat& stats) override;
+      virtual std::unique_ptr<Lifecycle> get_lifecycle(void) override;
+      virtual std::unique_ptr<Completions> get_completions(void) override;
+
+  virtual std::unique_ptr<Notification> get_notification(
+    rgw::sal::Object* obj, rgw::sal::Object* src_obj, req_state* s,
+    rgw::notify::EventType event_type, optional_yield y, const std::string* object_name) override;
+
+  virtual std::unique_ptr<Notification> get_notification(
+    const DoutPrefixProvider* dpp, rgw::sal::Object* obj,
+    rgw::sal::Object* src_obj,
+    rgw::notify::EventType event_type, rgw::sal::Bucket* _bucket,
+    std::string& _user_id, std::string& _user_tenant, std::string& _req_id,
+    optional_yield y) override;
+
+      virtual RGWLC* get_rgwlc(void) override;
+      virtual RGWCoroutinesManagerRegistry* get_cr_registry() override { return NULL; }
+      virtual int log_usage(const DoutPrefixProvider *dpp, std::map<rgw_user_bucket, RGWUsageBatch>& usage_info) override;
+      virtual int log_op(const DoutPrefixProvider *dpp, std::string& oid, bufferlist& bl) override;
+      virtual int register_to_service_map(const DoutPrefixProvider *dpp, const std::string& daemon_type,
+          const std::map<std::string, std::string>& meta) override;
+      virtual void get_ratelimit(RGWRateLimitInfo& bucket_ratelimit, RGWRateLimitInfo& user_ratelimit, RGWRateLimitInfo& anon_ratelimit) override;
+      virtual void get_quota(RGWQuota& quota) override;
+    virtual int set_buckets_enabled(const DoutPrefixProvider *dpp, std::vector<rgw_bucket>& buckets, bool enabled) override;
+      virtual int get_sync_policy_handler(const DoutPrefixProvider *dpp,
+          std::optional<rgw_zone_id> zone,
+          std::optional<rgw_bucket> bucket,
+          RGWBucketSyncPolicyHandlerRef *phandler,
+          optional_yield y) override;
+      virtual RGWDataSyncStatusManager* get_data_sync_manager(const rgw_zone_id& source_zone) override;
+      virtual void wakeup_meta_sync_shards(std::set<int>& shard_ids) override { return; }
+      virtual void wakeup_data_sync_shards(const DoutPrefixProvider *dpp,
+					   const rgw_zone_id& source_zone,
+					   boost::container::flat_map<
+					     int,
+					   boost::container::flat_set<rgw_data_notify_entry>>& shard_ids) override { return; }
+      virtual int clear_usage(const DoutPrefixProvider *dpp) override { return 0; }
+      virtual int read_all_usage(const DoutPrefixProvider *dpp, uint64_t start_epoch, uint64_t end_epoch,
+          uint32_t max_entries, bool *is_truncated,
+          RGWUsageIter& usage_iter,
+          std::map<rgw_user_bucket, rgw_usage_log_entry>& usage) override;
+      virtual int trim_all_usage(const DoutPrefixProvider *dpp, uint64_t start_epoch, uint64_t end_epoch) override;
+      virtual int get_config_key_val(std::string name, bufferlist* bl) override;
+      virtual int meta_list_keys_init(const DoutPrefixProvider *dpp, const std::string& section, const std::string& marker, void** phandle) override;
+      virtual int meta_list_keys_next(const DoutPrefixProvider *dpp, void* handle, int max, std::list<std::string>& keys, bool* truncated) override;
+      virtual void meta_list_keys_complete(void* handle) override;
+      virtual std::string meta_get_marker(void *handle) override;
+      virtual int meta_remove(const DoutPrefixProvider *dpp, std::string& metadata_key, optional_yield y) override;
+
+      virtual const RGWSyncModuleInstanceRef& get_sync_module() { return sync_module; }
+      virtual std::string get_host_id() { return ""; }
+
+      virtual std::unique_ptr<LuaManager> get_lua_manager() override;
+      virtual std::unique_ptr<RGWRole> get_role(std::string name,
+          std::string tenant,
+          std::string path="",
+          std::string trust_policy="",
+          std::string max_session_duration_str="",
+          std::multimap<std::string,std::string> tags={}) override;
+      virtual std::unique_ptr<RGWRole> get_role(std::string id) override;
+      virtual std::unique_ptr<RGWRole> get_role(const RGWRoleInfo& info) override;
+      virtual int get_roles(const DoutPrefixProvider *dpp,
+          optional_yield y,
+          const std::string& path_prefix,
+          const std::string& tenant,
+          std::vector<std::unique_ptr<RGWRole>>& roles) override;
+      virtual std::unique_ptr<RGWOIDCProvider> get_oidc_provider() override;
+      virtual int get_oidc_providers(const DoutPrefixProvider *dpp,
+          const std::string& tenant,
+          std::vector<std::unique_ptr<RGWOIDCProvider>>& providers) override;
+      virtual std::unique_ptr<Writer> get_append_writer(const DoutPrefixProvider *dpp,
+				  optional_yield y,
+				  rgw::sal::Object* obj,
+				  const rgw_user& owner,
+				  const rgw_placement_rule *ptail_placement_rule,
+				  const std::string& unique_tag,
+				  uint64_t position,
+				  uint64_t *cur_accounted_size) override;
+      virtual std::unique_ptr<Writer> get_atomic_writer(const DoutPrefixProvider *dpp,
+				  optional_yield y,
+				  rgw::sal::Object* obj,
+				  const rgw_user& owner,
+				  const rgw_placement_rule *ptail_placement_rule,
+				  uint64_t olh_epoch,
+				  const std::string& unique_tag) override;
+
+      virtual const std::string& get_compression_type(const rgw_placement_rule& rule) override;
+      virtual bool valid_placement(const rgw_placement_rule& rule) override;
+
+      virtual void finalize(void) override;
+
+      virtual CephContext *ctx(void) override {
+        return db->ctx();
+      }
+
+      virtual void register_admin_apis(RGWRESTMgr* mgr) override { };
+
+      /* Unique to DBStore */
+      void setDBStoreManager(DBStoreManager *stm) { dbsm = stm; }
+      DBStoreManager *getDBStoreManager(void) { return dbsm; }
+
+      void setDB(DB * st) { db = st; }
+      DB *getDB(void) { return db; }
+
+      DB *getDB(std::string tenant) { return dbsm->getDB(tenant, false); }
+  };
+
+} } // namespace rgw::sal