ceph/src/crimson/os/alienstore/alien_store.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #pragma once
   5
   6 #include <seastar/core/future.hh>
   7 #include <seastar/core/shared_mutex.hh>
   8
   9 #include "common/ceph_context.h"
  10 #include "os/ObjectStore.h"
  11 #include "osd/osd_types.h"
  12
  13 #include "crimson/os/futurized_collection.h"
  14 #include "crimson/os/futurized_store.h"
  15 #include "crimson/thread/ThreadPool.h"
  16
  17 namespace ceph::os {
  18 class Transaction;
  19 }
  20
  21 namespace crimson::os {
  22 class AlienStore final : public FuturizedStore {
  23 public:
  24   mutable std::unique_ptr<crimson::thread::ThreadPool> tp;
  25   AlienStore(const std::string& path, const ConfigValues& values);
  26   ~AlienStore() final;
  27
  28   seastar::future<> start() final;
  29   seastar::future<> stop() final;
  30   seastar::future<> mount() final;
  31   seastar::future<> umount() final;
  32
  33   seastar::future<> mkfs(uuid_d new_osd_fsid) final;
  34   read_errorator::future<ceph::bufferlist> read(CollectionRef c,
  35                                    const ghobject_t& oid,
  36                                    uint64_t offset,
  37                                    size_t len,
  38                                    uint32_t op_flags = 0) final;
  39
  40   get_attr_errorator::future<ceph::bufferptr> get_attr(CollectionRef c,
  41                                             const ghobject_t& oid,
  42                                             std::string_view name) const final;
  43   get_attrs_ertr::future<attrs_t> get_attrs(CollectionRef c,
  44                                      const ghobject_t& oid) final;
  45
  46   seastar::future<omap_values_t> omap_get_values(
  47     CollectionRef c,
  48     const ghobject_t& oid,
  49     const omap_keys_t& keys) final;
  50
  51   seastar::future<std::vector<ghobject_t>, ghobject_t> list_objects(
  52     CollectionRef c,
  53     const ghobject_t& start,
  54     const ghobject_t& end,
  55     uint64_t limit) const final;
  56
  57   /// Retrieves paged set of values > start (if present)
  58   seastar::future<bool, omap_values_t> omap_get_values(
  59     CollectionRef c,           ///< [in] collection
  60     const ghobject_t &oid,     ///< [in] oid
  61     const std::optional<std::string> &start ///< [in] start, empty for begin
  62     ) final; ///< @return <done, values> values.empty() iff done
  63
  64   seastar::future<CollectionRef> create_new_collection(const coll_t& cid) final;
  65   seastar::future<CollectionRef> open_collection(const coll_t& cid) final;
  66   seastar::future<std::vector<coll_t>> list_collections() final;
  67
  68   seastar::future<> do_transaction(CollectionRef c,
  69                                    ceph::os::Transaction&& txn) final;
  70
  71   seastar::future<> write_meta(const std::string& key,
  72                   const std::string& value) final;
  73   seastar::future<int, std::string> read_meta(const std::string& key) final;
  74   uuid_d get_fsid() const final;
  75   seastar::future<store_statfs_t> stat() const final;
  76   unsigned get_max_attr_name_length() const final;
  77
  78 private:
  79   constexpr static unsigned MAX_KEYS_PER_OMAP_GET_CALL = 32;
  80   const std::string path;
  81   uint64_t used_bytes = 0;
  82   uuid_d osd_fsid;
  83   std::unique_ptr<ObjectStore> store;
  84   std::unique_ptr<CephContext> cct;
  85   seastar::gate transaction_gate;
  86   std::unordered_map<coll_t, CollectionRef> coll_map;
  87   seastar::shared_mutex tp_mutex;
  88 };
  89 }