ceph/src/crimson/os/seastore/segment_manager/ephemeral.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 <boost/intrusive_ptr.hpp>
   7 #include <boost/smart_ptr/intrusive_ref_counter.hpp>
   8 #include <seastar/core/future.hh>
   9
  10 #include "crimson/os/seastore/segment_manager.h"
  11
  12 #include "crimson/os/seastore/segment_manager/ephemeral.h"
  13
  14 namespace crimson::os::seastore::segment_manager {
  15
  16 class EphemeralSegmentManager;
  17 using EphemeralSegmentManagerRef = std::unique_ptr<EphemeralSegmentManager>;
  18
  19 struct ephemeral_config_t {
  20   size_t size = 0;
  21   size_t block_size = 0;
  22   size_t segment_size = 0;
  23
  24   void validate() const {
  25     ceph_assert_always(size > 0);
  26     ceph_assert_always(size <= DEVICE_OFF_MAX);
  27     ceph_assert_always(segment_size > 0);
  28     ceph_assert_always(segment_size <= SEGMENT_OFF_MAX);
  29     ceph_assert_always(size / segment_size > 0);
  30     ceph_assert_always(size / segment_size <= DEVICE_SEGMENT_ID_MAX);
  31   }
  32 };
  33
  34 constexpr ephemeral_config_t DEFAULT_TEST_EPHEMERAL = {
  35   1 << 30,
  36   4 << 10,
  37   8 << 20
  38 };
  39
  40 std::ostream &operator<<(std::ostream &, const ephemeral_config_t &);
  41
  42 EphemeralSegmentManagerRef create_test_ephemeral();
  43
  44 device_config_t get_ephemeral_device_config(
  45     std::size_t index,
  46     std::size_t num_main_devices,
  47     std::size_t num_cold_devices);
  48
  49 class EphemeralSegment final : public Segment {
  50   friend class EphemeralSegmentManager;
  51   EphemeralSegmentManager &manager;
  52   const segment_id_t id;
  53   segment_off_t write_pointer = 0;
  54 public:
  55   EphemeralSegment(EphemeralSegmentManager &manager, segment_id_t id);
  56
  57   segment_id_t get_segment_id() const final { return id; }
  58   segment_off_t get_write_capacity() const final;
  59   segment_off_t get_write_ptr() const final { return write_pointer; }
  60   close_ertr::future<> close() final;
  61   write_ertr::future<> write(segment_off_t offset, ceph::bufferlist bl) final;
  62   write_ertr::future<> advance_wp(segment_off_t offset) final;
  63
  64   ~EphemeralSegment() {}
  65 };
  66
  67 class EphemeralSegmentManager final : public SegmentManager {
  68   friend class EphemeralSegment;
  69   using segment_state_t = Segment::segment_state_t;
  70
  71   const ephemeral_config_t config;
  72   std::optional<device_config_t> device_config;
  73
  74   device_type_t get_device_type() const final {
  75     assert(device_config);
  76     return device_config->spec.dtype;
  77   }
  78
  79   size_t get_offset(paddr_t addr) {
  80     auto& seg_addr = addr.as_seg_paddr();
  81     return (seg_addr.get_segment_id().device_segment_id() * config.segment_size) +
  82              seg_addr.get_segment_off();
  83   }
  84
  85   std::vector<segment_state_t> segment_state;
  86
  87   char *buffer = nullptr;
  88
  89   Segment::close_ertr::future<> segment_close(segment_id_t id);
  90
  91 public:
  92   EphemeralSegmentManager(
  93     ephemeral_config_t config)
  94     : config(config) {
  95     config.validate();
  96   }
  97
  98   ~EphemeralSegmentManager();
  99
 100   close_ertr::future<> close() final {
 101     return close_ertr::now();
 102   }
 103
 104   device_id_t get_device_id() const final {
 105     assert(device_config);
 106     return device_config->spec.id;
 107   }
 108
 109   mount_ret mount() final {
 110     return mount_ertr::now();
 111   }
 112
 113   mkfs_ret mkfs(device_config_t) final;
 114
 115   open_ertr::future<SegmentRef> open(segment_id_t id) final;
 116
 117   release_ertr::future<> release(segment_id_t id) final;
 118
 119   read_ertr::future<> read(
 120     paddr_t addr,
 121     size_t len,
 122     ceph::bufferptr &out) final;
 123
 124   size_t get_available_size() const final {
 125     return config.size;
 126   }
 127   extent_len_t get_block_size() const final {
 128     return config.block_size;
 129   }
 130   segment_off_t get_segment_size() const final {
 131     return config.segment_size;
 132   }
 133
 134   const seastore_meta_t &get_meta() const final {
 135     assert(device_config);
 136     return device_config->meta;
 137   }
 138
 139   secondary_device_set_t& get_secondary_devices() final {
 140     assert(device_config);
 141     return device_config->secondary_devices;
 142   }
 143
 144   magic_t get_magic() const final {
 145     return device_config->spec.magic;
 146   }
 147
 148   using init_ertr = crimson::errorator<
 149     crimson::ct_error::enospc,
 150     crimson::ct_error::invarg>;
 151   init_ertr::future<> init();
 152
 153   void remount();
 154
 155   // public so tests can bypass segment interface when simpler
 156   Segment::write_ertr::future<> segment_write(
 157     paddr_t addr,
 158     ceph::bufferlist bl,
 159     bool ignore_check=false);
 160 };
 161
 162 }
 163
 164 #if FMT_VERSION >= 90000
 165 template <> struct fmt::formatter<crimson::os::seastore::segment_manager::ephemeral_config_t> : fmt::ostream_formatter {};
 166 #endif