1 | /* |
2 | * Block driver for Parallels disk image format |
3 | * |
4 | * Copyright (c) 2015-2017 Virtuozzo, Inc. |
5 | * Authors: |
6 | * 2016-2017 Klim S. Kireev <klim.kireev@virtuozzo.com> |
7 | * 2015 Denis V. Lunev <den@openvz.org> |
8 | * |
9 | * This code was originally based on comparing different disk images created |
10 | * by Parallels. Currently it is based on opened OpenVZ sources |
11 | * available at |
12 | * https://github.com/OpenVZ/ploop |
13 | * |
14 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
15 | * of this software and associated documentation files (the "Software"), to deal |
16 | * in the Software without restriction, including without limitation the rights |
17 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
18 | * copies of the Software, and to permit persons to whom the Software is |
19 | * furnished to do so, subject to the following conditions: |
20 | * |
21 | * The above copyright notice and this permission notice shall be included in |
22 | * all copies or substantial portions of the Software. |
23 | * |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
27 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
28 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
29 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
30 | * THE SOFTWARE. |
31 | */ |
32 | #ifndef BLOCK_PARALLELS_H |
33 | #define BLOCK_PARALLELS_H |
34 | #include "qemu/coroutine.h" |
35 | |
36 | #define HEADS_NUMBER 16 |
37 | #define SEC_IN_CYL 32 |
38 | #define DEFAULT_CLUSTER_SIZE 1048576 /* 1 MiB */ |
39 | |
40 | /* always little-endian */ |
41 | typedef struct { |
42 | char [16]; /* "WithoutFreeSpace" */ |
43 | uint32_t ; |
44 | uint32_t ; |
45 | uint32_t ; |
46 | uint32_t ; |
47 | uint32_t ; |
48 | uint64_t ; |
49 | uint32_t ; |
50 | uint32_t ; |
51 | char [12]; |
52 | } QEMU_PACKED ; |
53 | |
54 | typedef enum ParallelsPreallocMode { |
55 | PRL_PREALLOC_MODE_FALLOCATE = 0, |
56 | PRL_PREALLOC_MODE_TRUNCATE = 1, |
57 | PRL_PREALLOC_MODE__MAX = 2, |
58 | } ParallelsPreallocMode; |
59 | |
60 | typedef struct BDRVParallelsState { |
61 | /** Locking is conservative, the lock protects |
62 | * - image file extending (truncate, fallocate) |
63 | * - any access to block allocation table |
64 | */ |
65 | CoMutex lock; |
66 | |
67 | ParallelsHeader *; |
68 | uint32_t ; |
69 | bool ; |
70 | |
71 | unsigned long *bat_dirty_bmap; |
72 | unsigned int bat_dirty_block; |
73 | |
74 | uint32_t *bat_bitmap; |
75 | unsigned int bat_size; |
76 | |
77 | int64_t data_end; |
78 | uint64_t prealloc_size; |
79 | ParallelsPreallocMode prealloc_mode; |
80 | |
81 | unsigned int tracks; |
82 | |
83 | unsigned int off_multiplier; |
84 | Error *migration_blocker; |
85 | } BDRVParallelsState; |
86 | |
87 | #endif |
88 | |