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de08c606 WX |
1 | /* |
2 | * Block layer snapshot related functions | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | ||
25 | #ifndef SNAPSHOT_H | |
26 | #define SNAPSHOT_H | |
27 | ||
a32e7818 | 28 | #include "block/graph-lock.h" |
cf3a74c9 | 29 | #include "qapi/qapi-builtin-types.h" |
8c116b0e WX |
30 | |
31 | #define SNAPSHOT_OPT_BASE "snapshot." | |
32 | #define SNAPSHOT_OPT_ID "snapshot.id" | |
33 | #define SNAPSHOT_OPT_NAME "snapshot.name" | |
34 | ||
35 | extern QemuOptsList internal_snapshot_opts; | |
de08c606 WX |
36 | |
37 | typedef struct QEMUSnapshotInfo { | |
38 | char id_str[128]; /* unique snapshot id */ | |
39 | /* the following fields are informative. They are not needed for | |
40 | the consistency of the snapshot */ | |
41 | char name[256]; /* user chosen name */ | |
42 | uint64_t vm_state_size; /* VM state info size */ | |
43 | uint32_t date_sec; /* UTC date of the snapshot */ | |
44 | uint32_t date_nsec; | |
45 | uint64_t vm_clock_nsec; /* VM clock relative to boot */ | |
b39847a5 | 46 | uint64_t icount; /* record/replay step */ |
de08c606 WX |
47 | } QEMUSnapshotInfo; |
48 | ||
6b573efe EGE |
49 | /* |
50 | * Global state (GS) API. These functions run under the BQL. | |
51 | * | |
52 | * See include/block/block-global-state.h for more information about | |
53 | * the GS API. | |
54 | */ | |
55 | ||
de08c606 WX |
56 | int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info, |
57 | const char *name); | |
2ea1dd75 WX |
58 | bool bdrv_snapshot_find_by_id_and_name(BlockDriverState *bs, |
59 | const char *id, | |
60 | const char *name, | |
61 | QEMUSnapshotInfo *sn_info, | |
62 | Error **errp); | |
a32e7818 KW |
63 | |
64 | int GRAPH_RDLOCK bdrv_can_snapshot(BlockDriverState *bs); | |
65 | ||
66 | int GRAPH_RDLOCK | |
67 | bdrv_snapshot_create(BlockDriverState *bs, QEMUSnapshotInfo *sn_info); | |
68 | ||
69 | int GRAPH_UNLOCKED | |
70 | bdrv_snapshot_goto(BlockDriverState *bs, const char *snapshot_id, Error **errp); | |
71 | ||
72 | int GRAPH_RDLOCK | |
73 | bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id, | |
74 | const char *name, Error **errp); | |
75 | ||
de08c606 WX |
76 | int bdrv_snapshot_list(BlockDriverState *bs, |
77 | QEMUSnapshotInfo **psn_info); | |
78 | int bdrv_snapshot_load_tmp(BlockDriverState *bs, | |
7b4c4781 WX |
79 | const char *snapshot_id, |
80 | const char *name, | |
81 | Error **errp); | |
82 | int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs, | |
83 | const char *id_or_name, | |
84 | Error **errp); | |
e9ff957a DL |
85 | |
86 | ||
6b573efe EGE |
87 | /* |
88 | * Group operations. All block drivers are involved. | |
e9ff957a | 89 | * These functions will properly handle dataplane (take aio_context_acquire |
6b573efe EGE |
90 | * when appropriate for appropriate block drivers |
91 | */ | |
e9ff957a | 92 | |
cf3a74c9 DB |
93 | bool bdrv_all_can_snapshot(bool has_devices, strList *devices, |
94 | Error **errp); | |
95 | int bdrv_all_delete_snapshot(const char *name, | |
96 | bool has_devices, strList *devices, | |
97 | Error **errp); | |
98 | int bdrv_all_goto_snapshot(const char *name, | |
99 | bool has_devices, strList *devices, | |
100 | Error **errp); | |
3d3e9b1f DB |
101 | int bdrv_all_has_snapshot(const char *name, |
102 | bool has_devices, strList *devices, | |
103 | Error **errp); | |
a9085f9b DL |
104 | int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn, |
105 | BlockDriverState *vm_state_bs, | |
106 | uint64_t vm_state_size, | |
cf3a74c9 DB |
107 | bool has_devices, |
108 | strList *devices, | |
e26f98e2 | 109 | Error **errp); |
e9ff957a | 110 | |
c22d644c DB |
111 | BlockDriverState *bdrv_all_find_vmstate_bs(const char *vmstate_bs, |
112 | bool has_devices, strList *devices, | |
cf3a74c9 | 113 | Error **errp); |
7cb14481 | 114 | |
de08c606 | 115 | #endif |