Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 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" |
Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 35 | |
Klim Kireev | 908b1c8 | 2018-01-12 12:01:21 +0300 | [diff] [blame] | 36 | #define HEADS_NUMBER 16 |
| 37 | #define SEC_IN_CYL 32 |
Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 38 | #define DEFAULT_CLUSTER_SIZE 1048576 /* 1 MiB */ |
| 39 | |
| 40 | /* always little-endian */ |
| 41 | typedef struct ParallelsHeader { |
| 42 | char magic[16]; /* "WithoutFreeSpace" */ |
| 43 | uint32_t version; |
| 44 | uint32_t heads; |
| 45 | uint32_t cylinders; |
| 46 | uint32_t tracks; |
| 47 | uint32_t bat_entries; |
| 48 | uint64_t nb_sectors; |
| 49 | uint32_t inuse; |
| 50 | uint32_t data_off; |
Vladimir Sementsov-Ogievskiy | baefd97 | 2021-02-24 13:47:05 +0300 | [diff] [blame] | 51 | uint32_t flags; |
| 52 | uint64_t ext_off; |
Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 53 | } QEMU_PACKED ParallelsHeader; |
| 54 | |
| 55 | typedef enum ParallelsPreallocMode { |
| 56 | PRL_PREALLOC_MODE_FALLOCATE = 0, |
| 57 | PRL_PREALLOC_MODE_TRUNCATE = 1, |
| 58 | PRL_PREALLOC_MODE__MAX = 2, |
| 59 | } ParallelsPreallocMode; |
| 60 | |
| 61 | typedef struct BDRVParallelsState { |
| 62 | /** Locking is conservative, the lock protects |
| 63 | * - image file extending (truncate, fallocate) |
| 64 | * - any access to block allocation table |
| 65 | */ |
| 66 | CoMutex lock; |
| 67 | |
| 68 | ParallelsHeader *header; |
| 69 | uint32_t header_size; |
| 70 | bool header_unclean; |
| 71 | |
| 72 | unsigned long *bat_dirty_bmap; |
| 73 | unsigned int bat_dirty_block; |
| 74 | |
Denis V. Lunev | e185100 | 2023-09-18 20:00:50 +0200 | [diff] [blame] | 75 | unsigned long *used_bmap; |
| 76 | unsigned long used_bmap_size; |
| 77 | |
Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 78 | uint32_t *bat_bitmap; |
| 79 | unsigned int bat_size; |
| 80 | |
Alexander Ivanov | c0b1545 | 2023-07-18 12:44:27 +0200 | [diff] [blame] | 81 | int64_t data_start; |
Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 82 | int64_t data_end; |
| 83 | uint64_t prealloc_size; |
| 84 | ParallelsPreallocMode prealloc_mode; |
| 85 | |
| 86 | unsigned int tracks; |
Vladimir Sementsov-Ogievskiy | e0b5207 | 2021-02-24 13:47:04 +0300 | [diff] [blame] | 87 | unsigned int cluster_size; |
Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 88 | |
| 89 | unsigned int off_multiplier; |
| 90 | Error *migration_blocker; |
| 91 | } BDRVParallelsState; |
| 92 | |
Kevin Wolf | 1f051dc | 2023-10-27 17:53:33 +0200 | [diff] [blame] | 93 | int GRAPH_RDLOCK |
| 94 | parallels_read_format_extension(BlockDriverState *bs, int64_t ext_off, |
| 95 | Error **errp); |
Vladimir Sementsov-Ogievskiy | baefd97 | 2021-02-24 13:47:05 +0300 | [diff] [blame] | 96 | |
Klim Kireev | 90fe66f | 2018-01-12 12:01:20 +0300 | [diff] [blame] | 97 | #endif |