ceph/src/crimson/os/seastore/onode_manager/simple-fltree/onode_delta.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:nil -*-
   2 // vim: ts=8 sw=2 smarttab
   3
   4 #pragma once
   5
   6 #include <cstdint>
   7
   8 #include "common/hobject.h"
   9 #include "include/buffer_fwd.h"
  10
  11 #include "crimson/os/seastore/onode.h"
  12 #include "crimson/os/seastore/seastore_types.h"
  13
  14 using crimson::os::seastore::OnodeRef;
  15
  16 struct delta_t {
  17   enum class op_t : uint8_t {
  18     nop,
  19     insert_onode,
  20     update_onode,
  21     insert_child,
  22     update_key,
  23     shift_left,
  24     trim_right,
  25     insert_front,
  26     insert_back,
  27     remove_from,
  28     // finer grained op?
  29     //  - changing the embedded extent map of given oid
  30     //  - mutating the embedded xattrs of given oid
  31   } op = op_t::nop;
  32
  33   unsigned n = 0;
  34   ghobject_t oid;
  35   crimson::os::seastore::laddr_t addr = 0;
  36   OnodeRef onode;
  37   ceph::bufferptr keys;
  38   ceph::bufferptr cells;
  39
  40   delta_t() = default;
  41   delta_t(op_t op)
  42     : op{op}
  43   {}
  44   delta_t(delta_t&& delta);
  45   delta_t& operator=(delta_t&& delta);
  46
  47   static delta_t nop();
  48   static delta_t insert_onode(unsigned slot, const ghobject_t& oid, OnodeRef onode);
  49   static delta_t update_onode(unsigned slot, const ghobject_t& oid, OnodeRef onode);
  50   static delta_t insert_child(unsigned slot, const ghobject_t& oid, crimson::os::seastore::laddr_t addr);
  51   static delta_t update_key(unsigned slot, const ghobject_t& oid);
  52   static delta_t shift_left(unsigned n);
  53   static delta_t trim_right(unsigned n);
  54   static delta_t insert_front(ceph::buffer::ptr keys,
  55                               ceph::buffer::ptr cells);
  56   static delta_t insert_back(ceph::buffer::ptr keys,
  57                              ceph::buffer::ptr cells);
  58   static delta_t remove_from(unsigned slot);
  59
  60   // shortcuts
  61   static delta_t insert_item(unsigned slot, const ghobject_t& oid, OnodeRef onode) {
  62     return insert_onode(slot, oid, onode);
  63   }
  64   static delta_t insert_item(unsigned slot, const ghobject_t& oid, crimson::os::seastore::laddr_t addr) {
  65     return insert_child(slot, oid, addr);
  66   }
  67
  68   void encode(ceph::bufferlist& bl);
  69   void decode(ceph::bufferlist::const_iterator& p);
  70 };