rgw: add rgw::sal::ConfigStore

Signed-off-by: Casey Bodley <cbodley@redhat.com>

diff --git a/src/rgw/rgw_sal_config.h b/src/rgw/rgw_sal_config.h
new file mode 100644 (file)
index 0000000..7050940
--- /dev/null
+++ b/src/rgw/rgw_sal_config.h
@@ -0,0 +1,301 @@
+// -*- 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) 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.
+ *
+ */
+
+#pragma once
+
+#include <memory>
+#include <optional>
+#include <span>
+#include <string>
+#include "rgw_sal_fwd.h"
+
+class DoutPrefixProvider;
+class optional_yield;
+struct RGWPeriod;
+struct RGWPeriodConfig;
+struct RGWRealm;
+struct RGWZoneGroup;
+struct RGWZoneParams;
+
+namespace rgw::sal {
+
+/// Results of a listing operation
+template <typename T>
+struct ListResult {
+  /// The subspan of the input entries that contain results
+  std::span<T> entries;
+  /// The next marker to resume listing, or empty
+  std::string next;
+};
+
+/// Storage abstraction for realm/zonegroup/zone configuration
+class ConfigStore {
+ public:
+  virtual ~ConfigStore() {}
+
+  /// @group Realm
+  ///@{
+
+  /// Set the cluster-wide default realm id
+  virtual int write_default_realm_id(const DoutPrefixProvider* dpp,
+                                     optional_yield y, bool exclusive,
+                                     std::string_view realm_id) = 0;
+  /// Read the cluster's default realm id
+  virtual int read_default_realm_id(const DoutPrefixProvider* dpp,
+                                    optional_yield y,
+                                    std::string& realm_id) = 0;
+  /// Delete the cluster's default realm id
+  virtual int delete_default_realm_id(const DoutPrefixProvider* dpp,
+                                      optional_yield y) = 0;
+
+  /// Create a realm
+  virtual int create_realm(const DoutPrefixProvider* dpp,
+                           optional_yield y, bool exclusive,
+                           const RGWRealm& info,
+                           std::unique_ptr<RealmWriter>* writer) = 0;
+  /// Read a realm by id
+  virtual int read_realm_by_id(const DoutPrefixProvider* dpp,
+                               optional_yield y,
+                               std::string_view realm_id,
+                               RGWRealm& info,
+                               std::unique_ptr<RealmWriter>* writer) = 0;
+  /// Read a realm by name
+  virtual int read_realm_by_name(const DoutPrefixProvider* dpp,
+                                 optional_yield y,
+                                 std::string_view realm_name,
+                                 RGWRealm& info,
+                                 std::unique_ptr<RealmWriter>* writer) = 0;
+  /// Read the cluster's default realm
+  virtual int read_default_realm(const DoutPrefixProvider* dpp,
+                                 optional_yield y,
+                                 RGWRealm& info,
+                                 std::unique_ptr<RealmWriter>* writer) = 0;
+  /// Look up a realm id by its name
+  virtual int read_realm_id(const DoutPrefixProvider* dpp,
+                            optional_yield y, std::string_view realm_name,
+                            std::string& realm_id) = 0;
+  /// Notify the cluster of a new period, so radosgws can reload with the new
+  /// configuration
+  virtual int realm_notify_new_period(const DoutPrefixProvider* dpp,
+                                      optional_yield y,
+                                      const RGWPeriod& period) = 0;
+  /// List up to 'entries.size()' realm names starting from the given marker
+  virtual int list_realm_names(const DoutPrefixProvider* dpp,
+                               optional_yield y, const std::string& marker,
+                               std::span<std::string> entries,
+                               ListResult<std::string>& result) = 0;
+  ///@}
+
+  /// @group Period
+  ///@{
+
+  /// Write a period and advance its latest epoch
+  virtual int create_period(const DoutPrefixProvider* dpp,
+                            optional_yield y, bool exclusive,
+                            const RGWPeriod& info) = 0;
+  /// Read a period by id and epoch. If no epoch is given, read the latest
+  virtual int read_period(const DoutPrefixProvider* dpp,
+                          optional_yield y, std::string_view period_id,
+                          std::optional<uint32_t> epoch, RGWPeriod& info) = 0;
+  /// Delete all period epochs with the given period id
+  virtual int delete_period(const DoutPrefixProvider* dpp,
+                            optional_yield y,
+                            std::string_view period_id) = 0;
+  /// List up to 'entries.size()' period ids starting from the given marker
+  virtual int list_period_ids(const DoutPrefixProvider* dpp,
+                              optional_yield y, const std::string& marker,
+                              std::span<std::string> entries,
+                              ListResult<std::string>& result) = 0;
+  ///@}
+
+  /// @group ZoneGroup
+  ///@{
+
+  /// Set the cluster-wide default zonegroup id
+  virtual int write_default_zonegroup_id(const DoutPrefixProvider* dpp,
+                                         optional_yield y, bool exclusive,
+                                         std::string_view realm_id,
+                                         std::string_view zonegroup_id) = 0;
+  /// Read the cluster's default zonegroup id
+  virtual int read_default_zonegroup_id(const DoutPrefixProvider* dpp,
+                                        optional_yield y,
+                                        std::string_view realm_id,
+                                        std::string& zonegroup_id) = 0;
+  /// Delete the cluster's default zonegroup id
+  virtual int delete_default_zonegroup_id(const DoutPrefixProvider* dpp,
+                                          optional_yield y,
+                                          std::string_view realm_id) = 0;
+
+  /// Create a zonegroup
+  virtual int create_zonegroup(const DoutPrefixProvider* dpp,
+                               optional_yield y, bool exclusive,
+                               const RGWZoneGroup& info,
+                               std::unique_ptr<ZoneGroupWriter>* writer) = 0;
+  /// Read a zonegroup by id
+  virtual int read_zonegroup_by_id(const DoutPrefixProvider* dpp,
+                                   optional_yield y,
+                                   std::string_view zonegroup_id,
+                                   RGWZoneGroup& info,
+                                   std::unique_ptr<ZoneGroupWriter>* writer) = 0;
+  /// Read a zonegroup by name
+  virtual int read_zonegroup_by_name(const DoutPrefixProvider* dpp,
+                                     optional_yield y,
+                                     std::string_view zonegroup_name,
+                                     RGWZoneGroup& info,
+                                     std::unique_ptr<ZoneGroupWriter>* writer) = 0;
+  /// Read the cluster's default zonegroup
+  virtual int read_default_zonegroup(const DoutPrefixProvider* dpp,
+                                     optional_yield y,
+                                     std::string_view realm_id,
+                                     RGWZoneGroup& info,
+                                     std::unique_ptr<ZoneGroupWriter>* writer) = 0;
+  /// List up to 'entries.size()' zonegroup names starting from the given marker
+  virtual int list_zonegroup_names(const DoutPrefixProvider* dpp,
+                                   optional_yield y, const std::string& marker,
+                                   std::span<std::string> entries,
+                                   ListResult<std::string>& result) = 0;
+  ///@}
+
+  /// @group Zone
+  ///@{
+
+  /// Set the realm-wide default zone id
+  virtual int write_default_zone_id(const DoutPrefixProvider* dpp,
+                                    optional_yield y, bool exclusive,
+                                    std::string_view realm_id,
+                                    std::string_view zone_id) = 0;
+  /// Read the realm's default zone id
+  virtual int read_default_zone_id(const DoutPrefixProvider* dpp,
+                                   optional_yield y,
+                                   std::string_view realm_id,
+                                   std::string& zone_id) = 0;
+  /// Delete the realm's default zone id
+  virtual int delete_default_zone_id(const DoutPrefixProvider* dpp,
+                                     optional_yield y,
+                                     std::string_view realm_id) = 0;
+
+  /// Create a zone
+  virtual int create_zone(const DoutPrefixProvider* dpp,
+                          optional_yield y, bool exclusive,
+                          const RGWZoneParams& info,
+                          std::unique_ptr<ZoneWriter>* writer) = 0;
+  /// Read a zone by id
+  virtual int read_zone_by_id(const DoutPrefixProvider* dpp,
+                              optional_yield y,
+                              std::string_view zone_id,
+                              RGWZoneParams& info,
+                              std::unique_ptr<ZoneWriter>* writer) = 0;
+  /// Read a zone by id or name. If both are empty, try to load the
+  /// cluster's default zone
+  virtual int read_zone_by_name(const DoutPrefixProvider* dpp,
+                                optional_yield y,
+                                std::string_view zone_name,
+                                RGWZoneParams& info,
+                                std::unique_ptr<ZoneWriter>* writer) = 0;
+  /// Read the realm's default zone
+  virtual int read_default_zone(const DoutPrefixProvider* dpp,
+                                optional_yield y,
+                                std::string_view realm_id,
+                                RGWZoneParams& info,
+                                std::unique_ptr<ZoneWriter>* writer) = 0;
+  /// List up to 'entries.size()' zone names starting from the given marker
+  virtual int list_zone_names(const DoutPrefixProvider* dpp,
+                              optional_yield y, const std::string& marker,
+                              std::span<std::string> entries,
+                              ListResult<std::string>& result) = 0;
+  ///@}
+
+  /// @group PeriodConfig
+  ///@{
+
+  /// Read period config object
+  virtual int read_period_config(const DoutPrefixProvider* dpp,
+                                 optional_yield y,
+                                 std::string_view realm_id,
+                                 RGWPeriodConfig& info) = 0;
+  /// Write period config object
+  virtual int write_period_config(const DoutPrefixProvider* dpp,
+                                  optional_yield y, bool exclusive,
+                                  std::string_view realm_id,
+                                  const RGWPeriodConfig& info) = 0;
+  ///@}
+
+}; // ConfigStore
+
+
+/// A handle to manage the atomic updates of an existing realm object. This
+/// is initialized on read, and any subsequent writes through this handle will
+/// fail with -ECANCELED if another writer updates the object in the meantime.
+class RealmWriter {
+ public:
+  virtual ~RealmWriter() {}
+
+  /// Overwrite an existing realm. Must not change id or name
+  virtual int write(const DoutPrefixProvider* dpp,
+                    optional_yield y,
+                    const RGWRealm& info) = 0;
+  /// Rename an existing realm. Must not change id
+  virtual int rename(const DoutPrefixProvider* dpp,
+                     optional_yield y,
+                     RGWRealm& info,
+                     std::string_view new_name) = 0;
+  /// Delete an existing realm
+  virtual int remove(const DoutPrefixProvider* dpp,
+                     optional_yield y) = 0;
+};
+
+/// A handle to manage the atomic updates of an existing zonegroup object. This
+/// is initialized on read, and any subsequent writes through this handle will
+/// fail with -ECANCELED if another writer updates the object in the meantime.
+class ZoneGroupWriter {
+ public:
+  virtual ~ZoneGroupWriter() {}
+
+  /// Overwrite an existing zonegroup. Must not change id or name
+  virtual int write(const DoutPrefixProvider* dpp,
+                    optional_yield y,
+                    const RGWZoneGroup& info) = 0;
+  /// Rename an existing zonegroup. Must not change id
+  virtual int rename(const DoutPrefixProvider* dpp,
+                     optional_yield y,
+                     RGWZoneGroup& info,
+                     std::string_view new_name) = 0;
+  /// Delete an existing zonegroup
+  virtual int remove(const DoutPrefixProvider* dpp,
+                     optional_yield y) = 0;
+};
+
+/// A handle to manage the atomic updates of an existing zone object. This
+/// is initialized on read, and any subsequent writes through this handle will
+/// fail with -ECANCELED if another writer updates the object in the meantime.
+class ZoneWriter {
+ public:
+  virtual ~ZoneWriter() {}
+
+  /// Overwrite an existing zone. Must not change id or name
+  virtual int write(const DoutPrefixProvider* dpp,
+                    optional_yield y,
+                    const RGWZoneParams& info) = 0;
+  /// Rename an existing zone. Must not change id
+  virtual int rename(const DoutPrefixProvider* dpp,
+                     optional_yield y,
+                     RGWZoneParams& info,
+                     std::string_view new_name) = 0;
+  /// Delete an existing zone
+  virtual int remove(const DoutPrefixProvider* dpp,
+                     optional_yield y) = 0;
+};
+
+} // namespace rgw::sal

diff --git a/src/rgw/rgw_sal_fwd.h b/src/rgw/rgw_sal_fwd.h
index a4fb859a30e95eff6cfc21a538227fcdbe6c1cbf..23d132cf3d4ff2db897fc3ba976c8a84d2d550ef 100644 (file)
--- a/src/rgw/rgw_sal_fwd.h
+++ b/src/rgw/rgw_sal_fwd.h
@@ -33,4 +33,9 @@ namespace rgw { namespace sal {
   class LuaManager;
   struct RGWRoleInfo;
 
+  class ConfigStore;
+  class RealmWriter;
+  class ZoneGroupWriter;
+  class ZoneWriter;
+
 } } // namespace rgw::sal