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1 #ifndef BLOCK_DIRTY_BITMAP_H
2 #define BLOCK_DIRTY_BITMAP_H
3
4 #include "block/block-common.h"
5 #include "block/graph-lock.h"
6 #include "qapi/qapi-types-block-core.h"
7 #include "qemu/hbitmap.h"
8
9 typedef enum BitmapCheckFlags {
10 BDRV_BITMAP_BUSY = 1,
11 BDRV_BITMAP_RO = 2,
12 BDRV_BITMAP_INCONSISTENT = 4,
13 } BitmapCheckFlags;
14
15 #define BDRV_BITMAP_DEFAULT (BDRV_BITMAP_BUSY | BDRV_BITMAP_RO | \
16 BDRV_BITMAP_INCONSISTENT)
17 #define BDRV_BITMAP_ALLOW_RO (BDRV_BITMAP_BUSY | BDRV_BITMAP_INCONSISTENT)
18
19 #define BDRV_BITMAP_MAX_NAME_SIZE 1023
20
21 bool bdrv_supports_persistent_dirty_bitmap(BlockDriverState *bs);
22 BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
23 uint32_t granularity,
24 const char *name,
25 Error **errp);
26 int bdrv_dirty_bitmap_create_successor(BdrvDirtyBitmap *bitmap,
27 Error **errp);
28 BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BdrvDirtyBitmap *bitmap,
29 Error **errp);
30 BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BdrvDirtyBitmap *bitmap,
31 Error **errp);
32 void bdrv_dirty_bitmap_enable_successor(BdrvDirtyBitmap *bitmap);
33 BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs,
34 const char *name);
35 int bdrv_dirty_bitmap_check(const BdrvDirtyBitmap *bitmap, uint32_t flags,
36 Error **errp);
37 void bdrv_release_dirty_bitmap(BdrvDirtyBitmap *bitmap);
38 void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs);
39
40 int coroutine_fn GRAPH_RDLOCK
41 bdrv_co_remove_persistent_dirty_bitmap(BlockDriverState *bs, const char *name,
42 Error **errp);
43 int co_wrapper_bdrv_rdlock
44 bdrv_remove_persistent_dirty_bitmap(BlockDriverState *bs, const char *name,
45 Error **errp);
46
47 void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
48 void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap);
49 void bdrv_enable_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap);
50 BlockDirtyInfoList *bdrv_query_dirty_bitmaps(BlockDriverState *bs);
51 uint32_t bdrv_get_default_bitmap_granularity(BlockDriverState *bs);
52 uint32_t bdrv_dirty_bitmap_granularity(const BdrvDirtyBitmap *bitmap);
53 bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap);
54 bool bdrv_dirty_bitmap_has_successor(BdrvDirtyBitmap *bitmap);
55 const char *bdrv_dirty_bitmap_name(const BdrvDirtyBitmap *bitmap);
56 int64_t bdrv_dirty_bitmap_size(const BdrvDirtyBitmap *bitmap);
57 void bdrv_set_dirty_bitmap(BdrvDirtyBitmap *bitmap,
58 int64_t offset, int64_t bytes);
59 void bdrv_reset_dirty_bitmap(BdrvDirtyBitmap *bitmap,
60 int64_t offset, int64_t bytes);
61 BdrvDirtyBitmapIter *bdrv_dirty_iter_new(BdrvDirtyBitmap *bitmap);
62 void bdrv_dirty_iter_free(BdrvDirtyBitmapIter *iter);
63
64 uint64_t bdrv_dirty_bitmap_serialization_size(const BdrvDirtyBitmap *bitmap,
65 uint64_t offset, uint64_t bytes);
66 uint64_t bdrv_dirty_bitmap_serialization_align(const BdrvDirtyBitmap *bitmap);
67 uint64_t bdrv_dirty_bitmap_serialization_coverage(int serialized_chunk_size,
68 const BdrvDirtyBitmap *bitmap);
69 void bdrv_dirty_bitmap_serialize_part(const BdrvDirtyBitmap *bitmap,
70 uint8_t *buf, uint64_t offset,
71 uint64_t bytes);
72 void bdrv_dirty_bitmap_deserialize_part(BdrvDirtyBitmap *bitmap,
73 uint8_t *buf, uint64_t offset,
74 uint64_t bytes, bool finish);
75 void bdrv_dirty_bitmap_deserialize_zeroes(BdrvDirtyBitmap *bitmap,
76 uint64_t offset, uint64_t bytes,
77 bool finish);
78 void bdrv_dirty_bitmap_deserialize_ones(BdrvDirtyBitmap *bitmap,
79 uint64_t offset, uint64_t bytes,
80 bool finish);
81 void bdrv_dirty_bitmap_deserialize_finish(BdrvDirtyBitmap *bitmap);
82
83 void bdrv_dirty_bitmap_set_readonly(BdrvDirtyBitmap *bitmap, bool value);
84 void bdrv_dirty_bitmap_set_persistence(BdrvDirtyBitmap *bitmap,
85 bool persistent);
86 void bdrv_dirty_bitmap_set_inconsistent(BdrvDirtyBitmap *bitmap);
87 void bdrv_dirty_bitmap_set_busy(BdrvDirtyBitmap *bitmap, bool busy);
88 bool bdrv_merge_dirty_bitmap(BdrvDirtyBitmap *dest, const BdrvDirtyBitmap *src,
89 HBitmap **backup, Error **errp);
90 void bdrv_dirty_bitmap_skip_store(BdrvDirtyBitmap *bitmap, bool skip);
91 bool bdrv_dirty_bitmap_get(BdrvDirtyBitmap *bitmap, int64_t offset);
92
93 /* Functions that require manual locking. */
94 void bdrv_dirty_bitmap_lock(BdrvDirtyBitmap *bitmap);
95 void bdrv_dirty_bitmap_unlock(BdrvDirtyBitmap *bitmap);
96 bool bdrv_dirty_bitmap_get_locked(BdrvDirtyBitmap *bitmap, int64_t offset);
97 void bdrv_set_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,
98 int64_t offset, int64_t bytes);
99 void bdrv_reset_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,
100 int64_t offset, int64_t bytes);
101 int64_t bdrv_dirty_iter_next(BdrvDirtyBitmapIter *iter);
102 void bdrv_set_dirty_iter(BdrvDirtyBitmapIter *hbi, int64_t offset);
103 int64_t bdrv_get_dirty_count(BdrvDirtyBitmap *bitmap);
104 void bdrv_dirty_bitmap_truncate(BlockDriverState *bs, int64_t bytes);
105 bool bdrv_dirty_bitmap_readonly(const BdrvDirtyBitmap *bitmap);
106 bool bdrv_has_readonly_bitmaps(BlockDriverState *bs);
107 bool bdrv_has_named_bitmaps(BlockDriverState *bs);
108 bool bdrv_dirty_bitmap_get_autoload(const BdrvDirtyBitmap *bitmap);
109 bool bdrv_dirty_bitmap_get_persistence(BdrvDirtyBitmap *bitmap);
110 bool bdrv_dirty_bitmap_inconsistent(const BdrvDirtyBitmap *bitmap);
111
112 BdrvDirtyBitmap *bdrv_dirty_bitmap_first(BlockDriverState *bs);
113 BdrvDirtyBitmap *bdrv_dirty_bitmap_next(BdrvDirtyBitmap *bitmap);
114 #define FOR_EACH_DIRTY_BITMAP(bs, bitmap) \
115 for (bitmap = bdrv_dirty_bitmap_first(bs); bitmap; \
116 bitmap = bdrv_dirty_bitmap_next(bitmap))
117
118 char *bdrv_dirty_bitmap_sha256(const BdrvDirtyBitmap *bitmap, Error **errp);
119 int64_t bdrv_dirty_bitmap_next_dirty(BdrvDirtyBitmap *bitmap, int64_t offset,
120 int64_t bytes);
121 int64_t bdrv_dirty_bitmap_next_zero(BdrvDirtyBitmap *bitmap, int64_t offset,
122 int64_t bytes);
123 bool bdrv_dirty_bitmap_next_dirty_area(BdrvDirtyBitmap *bitmap,
124 int64_t start, int64_t end, int64_t max_dirty_count,
125 int64_t *dirty_start, int64_t *dirty_count);
126 bool bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap, int64_t offset,
127 int64_t bytes, int64_t *count);
128 BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap_locked(BdrvDirtyBitmap *bitmap,
129 Error **errp);
130
131 #endif