ceph/src/crimson/os/seastore/extentmap_manager/btree/btree_extentmap_manager.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 <iostream>
   7
   8 #include <boost/intrusive_ptr.hpp>
   9 #include <boost/smart_ptr/intrusive_ref_counter.hpp>
  10 #include <seastar/core/future.hh>
  11
  12 #include "include/ceph_assert.h"
  13 #include "crimson/osd/exceptions.h"
  14
  15 #include "crimson/os/seastore/extentmap_manager.h"
  16 #include "crimson/os/seastore/extentmap_manager/btree/extentmap_btree_node.h"
  17 #include "crimson/os/seastore/seastore_types.h"
  18 #include "crimson/os/seastore/transaction_manager.h"
  19
  20 namespace crimson::os::seastore::extentmap_manager {
  21 /**
  22  * BtreeExtentMapManager
  23  *
  24  * Uses a btree to track :
  25  * objaddr_t -> laddr_t mapping for each onode extentmap
  26  */
  27
  28 class BtreeExtentMapManager : public ExtentMapManager {
  29   TransactionManager &tm;
  30
  31   ext_context_t get_ext_context(Transaction &t) {
  32     return ext_context_t{tm,t};
  33   }
  34
  35   /* get_extmap_root
  36    *
  37    * load extent map tree root node
  38    */
  39   using get_root_ertr = TransactionManager::read_extent_ertr;
  40   using get_root_ret = get_root_ertr::future<ExtMapNodeRef>;
  41   get_root_ret get_extmap_root(const extmap_root_t &extmap_root, Transaction &t);
  42
  43   using insert_lextent_ertr = TransactionManager::read_extent_ertr;
  44   using insert_lextent_ret = insert_lextent_ertr::future<extent_mapping_t >;
  45   insert_lextent_ret insert_lextent(extmap_root_t &extmap_root, Transaction &t,
  46                                     ExtMapNodeRef extent, objaddr_t lo,
  47                                     lext_map_val_t val);
  48
  49 public:
  50   explicit BtreeExtentMapManager(TransactionManager &tm);
  51
  52   initialize_extmap_ret initialize_extmap(Transaction &t) final;
  53
  54   find_lextent_ret find_lextent(const extmap_root_t &extmap_root, Transaction &t, objaddr_t lo, extent_len_t len) final;
  55
  56   add_lextent_ret add_lextent(extmap_root_t &extmap_root, Transaction &t, objaddr_t lo, lext_map_val_t val) final;
  57
  58   rm_lextent_ret rm_lextent(extmap_root_t &extmap_root, Transaction &t, objaddr_t lo, lext_map_val_t val) final;
  59
  60
  61 };
  62 using BtreeExtentMapManagerRef = std::unique_ptr<BtreeExtentMapManager>;
  63
  64 }