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git.proxmox.com Git - ceph.git/blob - ceph/src/librbd/ObjectMap.h
1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
4 #ifndef CEPH_LIBRBD_OBJECT_MAP_H
5 #define CEPH_LIBRBD_OBJECT_MAP_H
7 #include "include/int_types.h"
8 #include "include/fs_types.h"
9 #include "include/rbd/object_map_types.h"
10 #include "common/bit_vector.hpp"
11 #include "librbd/Utils.h"
12 #include <boost/optional.hpp>
16 namespace librados
{ class IoCtx
; }
17 namespace ZTracer
{ struct Trace
; }
21 template <typename Op
> class BlockGuard
;
22 struct BlockGuardCell
;
25 template <typename ImageCtxT
= ImageCtx
>
28 static ObjectMap
*create(ImageCtxT
&image_ctx
, uint64_t snap_id
) {
29 return new ObjectMap(image_ctx
, snap_id
);
32 ObjectMap(ImageCtxT
&image_ctx
, uint64_t snap_id
);
35 static int aio_remove(librados::IoCtx
&io_ctx
, const std::string
&image_id
, librados::AioCompletion
*c
);
36 static std::string
object_map_name(const std::string
&image_id
,
39 static bool is_compatible(const file_layout_t
& layout
, uint64_t size
);
41 ceph::BitVector
<2u>::Reference
operator[](uint64_t object_no
);
42 uint8_t operator[](uint64_t object_no
) const;
43 inline uint64_t size() const {
44 return m_object_map
.size();
47 void open(Context
*on_finish
);
48 void close(Context
*on_finish
);
50 bool object_may_exist(uint64_t object_no
) const;
52 void aio_save(Context
*on_finish
);
53 void aio_resize(uint64_t new_size
, uint8_t default_object_state
,
56 template <typename T
, void(T::*MF
)(int) = &T::complete
>
57 bool aio_update(uint64_t snap_id
, uint64_t start_object_no
, uint8_t new_state
,
58 const boost::optional
<uint8_t> ¤t_state
,
59 const ZTracer::Trace
&parent_trace
, T
*callback_object
) {
60 return aio_update
<T
, MF
>(snap_id
, start_object_no
, start_object_no
+ 1,
61 new_state
, current_state
, parent_trace
,
65 template <typename T
, void(T::*MF
)(int) = &T::complete
>
66 bool aio_update(uint64_t snap_id
, uint64_t start_object_no
,
67 uint64_t end_object_no
, uint8_t new_state
,
68 const boost::optional
<uint8_t> ¤t_state
,
69 const ZTracer::Trace
&parent_trace
, T
*callback_object
) {
70 assert(start_object_no
< end_object_no
);
71 if (snap_id
== CEPH_NOSNAP
) {
72 auto it
= m_object_map
.begin() + start_object_no
;
73 auto end_it
= m_object_map
.begin() + end_object_no
;
74 for (; it
!= end_it
; ++it
) {
75 if (update_required(it
, new_state
)) {
84 UpdateOperation
update_operation(start_object_no
, end_object_no
,
85 new_state
, current_state
, parent_trace
,
86 util::create_context_callback
<T
, MF
>(
88 detained_aio_update(std::move(update_operation
));
90 aio_update(snap_id
, start_object_no
, end_object_no
, new_state
,
91 current_state
, parent_trace
,
92 util::create_context_callback
<T
, MF
>(callback_object
));
97 void rollback(uint64_t snap_id
, Context
*on_finish
);
98 void snapshot_add(uint64_t snap_id
, Context
*on_finish
);
99 void snapshot_remove(uint64_t snap_id
, Context
*on_finish
);
102 struct UpdateOperation
{
103 uint64_t start_object_no
;
104 uint64_t end_object_no
;
106 boost::optional
<uint8_t> current_state
;
107 ZTracer::Trace parent_trace
;
110 UpdateOperation(uint64_t start_object_no
, uint64_t end_object_no
,
112 const boost::optional
<uint8_t> ¤t_state
,
113 const ZTracer::Trace
&parent_trace
, Context
*on_finish
)
114 : start_object_no(start_object_no
), end_object_no(end_object_no
),
115 new_state(new_state
), current_state(current_state
),
116 parent_trace(parent_trace
), on_finish(on_finish
) {
120 typedef BlockGuard
<UpdateOperation
> UpdateGuard
;
122 ImageCtxT
&m_image_ctx
;
123 ceph::BitVector
<2> m_object_map
;
126 UpdateGuard
*m_update_guard
= nullptr;
128 void detained_aio_update(UpdateOperation
&&update_operation
);
129 void handle_detained_aio_update(BlockGuardCell
*cell
, int r
,
132 void aio_update(uint64_t snap_id
, uint64_t start_object_no
,
133 uint64_t end_object_no
, uint8_t new_state
,
134 const boost::optional
<uint8_t> ¤t_state
,
135 const ZTracer::Trace
&parent_trace
, Context
*on_finish
);
136 bool update_required(const ceph::BitVector
<2>::Iterator
&it
,
141 } // namespace librbd
143 extern template class librbd::ObjectMap
<librbd::ImageCtx
>;
145 #endif // CEPH_LIBRBD_OBJECT_MAP_H