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| 1 | 9aebd98a | Stefan Weil | /*
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| 2 | 9aebd98a | Stefan Weil | * Block driver for the Virtual Disk Image (VDI) format
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| 3 | 9aebd98a | Stefan Weil | *
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| 4 | 9aebd98a | Stefan Weil | * Copyright (c) 2009 Stefan Weil
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| 5 | 9aebd98a | Stefan Weil | *
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| 6 | 9aebd98a | Stefan Weil | * This program is free software: you can redistribute it and/or modify
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| 7 | 9aebd98a | Stefan Weil | * it under the terms of the GNU General Public License as published by
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| 8 | 9aebd98a | Stefan Weil | * the Free Software Foundation, either version 2 of the License, or
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| 9 | 9aebd98a | Stefan Weil | * (at your option) version 3 or any later version.
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| 10 | 9aebd98a | Stefan Weil | *
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| 11 | 9aebd98a | Stefan Weil | * This program is distributed in the hope that it will be useful,
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| 12 | 9aebd98a | Stefan Weil | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | 9aebd98a | Stefan Weil | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | 9aebd98a | Stefan Weil | * GNU General Public License for more details.
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| 15 | 9aebd98a | Stefan Weil | *
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| 16 | 9aebd98a | Stefan Weil | * You should have received a copy of the GNU General Public License
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| 17 | 9aebd98a | Stefan Weil | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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| 18 | 9aebd98a | Stefan Weil | *
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| 19 | 9aebd98a | Stefan Weil | * Reference:
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| 20 | 9aebd98a | Stefan Weil | * http://forums.virtualbox.org/viewtopic.php?t=8046
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| 21 | 9aebd98a | Stefan Weil | *
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| 22 | 9aebd98a | Stefan Weil | * This driver supports create / read / write operations on VDI images.
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| 23 | 9aebd98a | Stefan Weil | *
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| 24 | 9aebd98a | Stefan Weil | * Todo (see also TODO in code):
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| 25 | 9aebd98a | Stefan Weil | *
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| 26 | 9aebd98a | Stefan Weil | * Some features like snapshots are still missing.
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| 27 | 9aebd98a | Stefan Weil | *
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| 28 | 9aebd98a | Stefan Weil | * Deallocation of zero-filled blocks and shrinking images are missing, too
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| 29 | 9aebd98a | Stefan Weil | * (might be added to common block layer).
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| 30 | 9aebd98a | Stefan Weil | *
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| 31 | 9aebd98a | Stefan Weil | * Allocation of blocks could be optimized (less writes to block map and
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| 32 | 9aebd98a | Stefan Weil | * header).
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| 33 | 9aebd98a | Stefan Weil | *
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| 34 | 9aebd98a | Stefan Weil | * Read and write of adjacents blocks could be done in one operation
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| 35 | 9aebd98a | Stefan Weil | * (current code uses one operation per block (1 MiB).
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| 36 | 9aebd98a | Stefan Weil | *
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| 37 | 9aebd98a | Stefan Weil | * The code is not thread safe (missing locks for changes in header and
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| 38 | 9aebd98a | Stefan Weil | * block table, no problem with current QEMU).
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| 39 | 9aebd98a | Stefan Weil | *
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| 40 | 9aebd98a | Stefan Weil | * Hints:
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| 41 | 9aebd98a | Stefan Weil | *
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| 42 | 9aebd98a | Stefan Weil | * Blocks (VDI documentation) correspond to clusters (QEMU).
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| 43 | 9aebd98a | Stefan Weil | * QEMU's backing files could be implemented using VDI snapshot files (TODO).
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| 44 | 9aebd98a | Stefan Weil | * VDI snapshot files may also contain the complete machine state.
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| 45 | 9aebd98a | Stefan Weil | * Maybe this machine state can be converted to QEMU PC machine snapshot data.
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| 46 | 9aebd98a | Stefan Weil | *
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| 47 | 9aebd98a | Stefan Weil | * The driver keeps a block cache (little endian entries) in memory.
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| 48 | 9aebd98a | Stefan Weil | * For the standard block size (1 MiB), a 1 TiB disk will use 4 MiB RAM,
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| 49 | 9aebd98a | Stefan Weil | * so this seems to be reasonable.
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| 50 | 9aebd98a | Stefan Weil | */
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| 51 | 9aebd98a | Stefan Weil | |
| 52 | 9aebd98a | Stefan Weil | #include "qemu-common.h" |
| 53 | 9aebd98a | Stefan Weil | #include "block_int.h" |
| 54 | 9aebd98a | Stefan Weil | #include "module.h" |
| 55 | 9aebd98a | Stefan Weil | |
| 56 | ee682d27 | Stefan Weil | #if defined(CONFIG_UUID)
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| 57 | 9aebd98a | Stefan Weil | #include <uuid/uuid.h> |
| 58 | 9aebd98a | Stefan Weil | #else
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| 59 | 9aebd98a | Stefan Weil | /* TODO: move uuid emulation to some central place in QEMU. */
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| 60 | 9aebd98a | Stefan Weil | #include "sysemu.h" /* UUID_FMT */ |
| 61 | 9aebd98a | Stefan Weil | typedef unsigned char uuid_t[16]; |
| 62 | 9aebd98a | Stefan Weil | void uuid_generate(uuid_t out);
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| 63 | 9aebd98a | Stefan Weil | int uuid_is_null(const uuid_t uu); |
| 64 | 9aebd98a | Stefan Weil | void uuid_unparse(const uuid_t uu, char *out); |
| 65 | 9aebd98a | Stefan Weil | #endif
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| 66 | 9aebd98a | Stefan Weil | |
| 67 | 9aebd98a | Stefan Weil | /* Code configuration options. */
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| 68 | 9aebd98a | Stefan Weil | |
| 69 | 9aebd98a | Stefan Weil | /* Enable debug messages. */
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| 70 | 9aebd98a | Stefan Weil | //~ #define CONFIG_VDI_DEBUG
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| 71 | 9aebd98a | Stefan Weil | |
| 72 | 9aebd98a | Stefan Weil | /* Support write operations on VDI images. */
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| 73 | 9aebd98a | Stefan Weil | #define CONFIG_VDI_WRITE
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| 74 | 9aebd98a | Stefan Weil | |
| 75 | 9aebd98a | Stefan Weil | /* Support non-standard block (cluster) size. This is untested.
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| 76 | 9aebd98a | Stefan Weil | * Maybe it will be needed for very large images.
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| 77 | 9aebd98a | Stefan Weil | */
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| 78 | 9aebd98a | Stefan Weil | //~ #define CONFIG_VDI_BLOCK_SIZE
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| 79 | 9aebd98a | Stefan Weil | |
| 80 | 9aebd98a | Stefan Weil | /* Support static (fixed, pre-allocated) images. */
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| 81 | 9aebd98a | Stefan Weil | #define CONFIG_VDI_STATIC_IMAGE
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| 82 | 9aebd98a | Stefan Weil | |
| 83 | 9aebd98a | Stefan Weil | /* Command line option for static images. */
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| 84 | 9aebd98a | Stefan Weil | #define BLOCK_OPT_STATIC "static" |
| 85 | 9aebd98a | Stefan Weil | |
| 86 | 9aebd98a | Stefan Weil | #define KiB 1024 |
| 87 | 9aebd98a | Stefan Weil | #define MiB (KiB * KiB)
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| 88 | 9aebd98a | Stefan Weil | |
| 89 | 9aebd98a | Stefan Weil | #define SECTOR_SIZE 512 |
| 90 | 99cce9fa | Kevin Wolf | #define DEFAULT_CLUSTER_SIZE (1 * MiB) |
| 91 | 9aebd98a | Stefan Weil | |
| 92 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
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| 93 | 9aebd98a | Stefan Weil | #define logout(fmt, ...) \
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| 94 | 9aebd98a | Stefan Weil | fprintf(stderr, "vdi\t%-24s" fmt, __func__, ##__VA_ARGS__) |
| 95 | 9aebd98a | Stefan Weil | #else
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| 96 | 9aebd98a | Stefan Weil | #define logout(fmt, ...) ((void)0) |
| 97 | 9aebd98a | Stefan Weil | #endif
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| 98 | 9aebd98a | Stefan Weil | |
| 99 | 9aebd98a | Stefan Weil | /* Image signature. */
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| 100 | 9aebd98a | Stefan Weil | #define VDI_SIGNATURE 0xbeda107f |
| 101 | 9aebd98a | Stefan Weil | |
| 102 | 9aebd98a | Stefan Weil | /* Image version. */
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| 103 | 9aebd98a | Stefan Weil | #define VDI_VERSION_1_1 0x00010001 |
| 104 | 9aebd98a | Stefan Weil | |
| 105 | 9aebd98a | Stefan Weil | /* Image type. */
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| 106 | 9aebd98a | Stefan Weil | #define VDI_TYPE_DYNAMIC 1 |
| 107 | 9aebd98a | Stefan Weil | #define VDI_TYPE_STATIC 2 |
| 108 | 9aebd98a | Stefan Weil | |
| 109 | 9aebd98a | Stefan Weil | /* Innotek / SUN images use these strings in header.text:
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| 110 | 9aebd98a | Stefan Weil | * "<<< innotek VirtualBox Disk Image >>>\n"
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| 111 | 9aebd98a | Stefan Weil | * "<<< Sun xVM VirtualBox Disk Image >>>\n"
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| 112 | 9aebd98a | Stefan Weil | * "<<< Sun VirtualBox Disk Image >>>\n"
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| 113 | 9aebd98a | Stefan Weil | * The value does not matter, so QEMU created images use a different text.
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| 114 | 9aebd98a | Stefan Weil | */
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| 115 | 9aebd98a | Stefan Weil | #define VDI_TEXT "<<< QEMU VM Virtual Disk Image >>>\n" |
| 116 | 9aebd98a | Stefan Weil | |
| 117 | c794b4e0 | Eric Sunshine | /* A never-allocated block; semantically arbitrary content. */
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| 118 | c794b4e0 | Eric Sunshine | #define VDI_UNALLOCATED 0xffffffffU |
| 119 | c794b4e0 | Eric Sunshine | |
| 120 | c794b4e0 | Eric Sunshine | /* A discarded (no longer allocated) block; semantically zero-filled. */
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| 121 | c794b4e0 | Eric Sunshine | #define VDI_DISCARDED 0xfffffffeU |
| 122 | c794b4e0 | Eric Sunshine | |
| 123 | c794b4e0 | Eric Sunshine | #define VDI_IS_ALLOCATED(X) ((X) < VDI_DISCARDED)
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| 124 | 9aebd98a | Stefan Weil | |
| 125 | ee682d27 | Stefan Weil | #if !defined(CONFIG_UUID)
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| 126 | 9aebd98a | Stefan Weil | void uuid_generate(uuid_t out)
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| 127 | 9aebd98a | Stefan Weil | {
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| 128 | 4f3669ea | Stefan Weil | memset(out, 0, sizeof(uuid_t)); |
| 129 | 9aebd98a | Stefan Weil | } |
| 130 | 9aebd98a | Stefan Weil | |
| 131 | 9aebd98a | Stefan Weil | int uuid_is_null(const uuid_t uu) |
| 132 | 9aebd98a | Stefan Weil | {
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| 133 | 9aebd98a | Stefan Weil | uuid_t null_uuid = { 0 };
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| 134 | 4f3669ea | Stefan Weil | return memcmp(uu, null_uuid, sizeof(uuid_t)) == 0; |
| 135 | 9aebd98a | Stefan Weil | } |
| 136 | 9aebd98a | Stefan Weil | |
| 137 | 9aebd98a | Stefan Weil | void uuid_unparse(const uuid_t uu, char *out) |
| 138 | 9aebd98a | Stefan Weil | {
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| 139 | 9aebd98a | Stefan Weil | snprintf(out, 37, UUID_FMT,
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| 140 | 9aebd98a | Stefan Weil | uu[0], uu[1], uu[2], uu[3], uu[4], uu[5], uu[6], uu[7], |
| 141 | 9aebd98a | Stefan Weil | uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]); |
| 142 | 9aebd98a | Stefan Weil | } |
| 143 | 9aebd98a | Stefan Weil | #endif
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| 144 | 9aebd98a | Stefan Weil | |
| 145 | 9aebd98a | Stefan Weil | typedef struct { |
| 146 | 9aebd98a | Stefan Weil | BlockDriverAIOCB common; |
| 147 | 9aebd98a | Stefan Weil | int64_t sector_num; |
| 148 | 9aebd98a | Stefan Weil | QEMUIOVector *qiov; |
| 149 | 9aebd98a | Stefan Weil | uint8_t *buf; |
| 150 | 9aebd98a | Stefan Weil | /* Total number of sectors. */
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| 151 | 9aebd98a | Stefan Weil | int nb_sectors;
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| 152 | 9aebd98a | Stefan Weil | /* Number of sectors for current AIO. */
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| 153 | 9aebd98a | Stefan Weil | int n_sectors;
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| 154 | 9aebd98a | Stefan Weil | /* New allocated block map entry. */
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| 155 | 9aebd98a | Stefan Weil | uint32_t bmap_first; |
| 156 | 9aebd98a | Stefan Weil | uint32_t bmap_last; |
| 157 | 9aebd98a | Stefan Weil | /* Buffer for new allocated block. */
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| 158 | 9aebd98a | Stefan Weil | void *block_buffer;
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| 159 | 9aebd98a | Stefan Weil | void *orig_buf;
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| 160 | e67a64a8 | Kevin Wolf | bool is_write;
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| 161 | 9aebd98a | Stefan Weil | int header_modified;
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| 162 | 9aebd98a | Stefan Weil | BlockDriverAIOCB *hd_aiocb; |
| 163 | 9aebd98a | Stefan Weil | struct iovec hd_iov;
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| 164 | 9aebd98a | Stefan Weil | QEMUIOVector hd_qiov; |
| 165 | 9aebd98a | Stefan Weil | QEMUBH *bh; |
| 166 | 9aebd98a | Stefan Weil | } VdiAIOCB; |
| 167 | 9aebd98a | Stefan Weil | |
| 168 | 9aebd98a | Stefan Weil | typedef struct { |
| 169 | 9aebd98a | Stefan Weil | char text[0x40]; |
| 170 | 9aebd98a | Stefan Weil | uint32_t signature; |
| 171 | 9aebd98a | Stefan Weil | uint32_t version; |
| 172 | 9aebd98a | Stefan Weil | uint32_t header_size; |
| 173 | 9aebd98a | Stefan Weil | uint32_t image_type; |
| 174 | 9aebd98a | Stefan Weil | uint32_t image_flags; |
| 175 | 9aebd98a | Stefan Weil | char description[256]; |
| 176 | 9aebd98a | Stefan Weil | uint32_t offset_bmap; |
| 177 | 9aebd98a | Stefan Weil | uint32_t offset_data; |
| 178 | 9aebd98a | Stefan Weil | uint32_t cylinders; /* disk geometry, unused here */
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| 179 | 9aebd98a | Stefan Weil | uint32_t heads; /* disk geometry, unused here */
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| 180 | 9aebd98a | Stefan Weil | uint32_t sectors; /* disk geometry, unused here */
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| 181 | 9aebd98a | Stefan Weil | uint32_t sector_size; |
| 182 | 9aebd98a | Stefan Weil | uint32_t unused1; |
| 183 | 9aebd98a | Stefan Weil | uint64_t disk_size; |
| 184 | 9aebd98a | Stefan Weil | uint32_t block_size; |
| 185 | 9aebd98a | Stefan Weil | uint32_t block_extra; /* unused here */
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| 186 | 9aebd98a | Stefan Weil | uint32_t blocks_in_image; |
| 187 | 9aebd98a | Stefan Weil | uint32_t blocks_allocated; |
| 188 | 9aebd98a | Stefan Weil | uuid_t uuid_image; |
| 189 | 9aebd98a | Stefan Weil | uuid_t uuid_last_snap; |
| 190 | 9aebd98a | Stefan Weil | uuid_t uuid_link; |
| 191 | 9aebd98a | Stefan Weil | uuid_t uuid_parent; |
| 192 | 9aebd98a | Stefan Weil | uint64_t unused2[7];
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| 193 | 9aebd98a | Stefan Weil | } VdiHeader; |
| 194 | 9aebd98a | Stefan Weil | |
| 195 | 9aebd98a | Stefan Weil | typedef struct { |
| 196 | 9aebd98a | Stefan Weil | /* The block map entries are little endian (even in memory). */
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| 197 | 9aebd98a | Stefan Weil | uint32_t *bmap; |
| 198 | 9aebd98a | Stefan Weil | /* Size of block (bytes). */
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| 199 | 9aebd98a | Stefan Weil | uint32_t block_size; |
| 200 | 9aebd98a | Stefan Weil | /* Size of block (sectors). */
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| 201 | 9aebd98a | Stefan Weil | uint32_t block_sectors; |
| 202 | 9aebd98a | Stefan Weil | /* First sector of block map. */
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| 203 | 9aebd98a | Stefan Weil | uint32_t bmap_sector; |
| 204 | 4ff9786c | Stefan Weil | /* VDI header (converted to host endianness). */
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| 205 | 9aebd98a | Stefan Weil | VdiHeader header; |
| 206 | 9aebd98a | Stefan Weil | } BDRVVdiState; |
| 207 | 9aebd98a | Stefan Weil | |
| 208 | 9aebd98a | Stefan Weil | /* Change UUID from little endian (IPRT = VirtualBox format) to big endian
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| 209 | 9aebd98a | Stefan Weil | * format (network byte order, standard, see RFC 4122) and vice versa.
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| 210 | 9aebd98a | Stefan Weil | */
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| 211 | 9aebd98a | Stefan Weil | static void uuid_convert(uuid_t uuid) |
| 212 | 9aebd98a | Stefan Weil | {
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| 213 | 9aebd98a | Stefan Weil | bswap32s((uint32_t *)&uuid[0]);
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| 214 | 9aebd98a | Stefan Weil | bswap16s((uint16_t *)&uuid[4]);
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| 215 | 9aebd98a | Stefan Weil | bswap16s((uint16_t *)&uuid[6]);
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| 216 | 9aebd98a | Stefan Weil | } |
| 217 | 9aebd98a | Stefan Weil | |
| 218 | 9aebd98a | Stefan Weil | static void vdi_header_to_cpu(VdiHeader *header) |
| 219 | 9aebd98a | Stefan Weil | {
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| 220 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->signature); |
| 221 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->version); |
| 222 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->header_size); |
| 223 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->image_type); |
| 224 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->image_flags); |
| 225 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->offset_bmap); |
| 226 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->offset_data); |
| 227 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->cylinders); |
| 228 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->heads); |
| 229 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->sectors); |
| 230 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->sector_size); |
| 231 | 9aebd98a | Stefan Weil | le64_to_cpus(&header->disk_size); |
| 232 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->block_size); |
| 233 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->block_extra); |
| 234 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->blocks_in_image); |
| 235 | 9aebd98a | Stefan Weil | le32_to_cpus(&header->blocks_allocated); |
| 236 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_image); |
| 237 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_last_snap); |
| 238 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_link); |
| 239 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_parent); |
| 240 | 9aebd98a | Stefan Weil | } |
| 241 | 9aebd98a | Stefan Weil | |
| 242 | 9aebd98a | Stefan Weil | static void vdi_header_to_le(VdiHeader *header) |
| 243 | 9aebd98a | Stefan Weil | {
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| 244 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->signature); |
| 245 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->version); |
| 246 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->header_size); |
| 247 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->image_type); |
| 248 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->image_flags); |
| 249 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->offset_bmap); |
| 250 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->offset_data); |
| 251 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->cylinders); |
| 252 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->heads); |
| 253 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->sectors); |
| 254 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->sector_size); |
| 255 | 9aebd98a | Stefan Weil | cpu_to_le64s(&header->disk_size); |
| 256 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->block_size); |
| 257 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->block_extra); |
| 258 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->blocks_in_image); |
| 259 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->blocks_allocated); |
| 260 | 9aebd98a | Stefan Weil | cpu_to_le32s(&header->blocks_allocated); |
| 261 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_image); |
| 262 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_last_snap); |
| 263 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_link); |
| 264 | 9aebd98a | Stefan Weil | uuid_convert(header->uuid_parent); |
| 265 | 9aebd98a | Stefan Weil | } |
| 266 | 9aebd98a | Stefan Weil | |
| 267 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
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| 268 | 9aebd98a | Stefan Weil | static void vdi_header_print(VdiHeader *header) |
| 269 | 9aebd98a | Stefan Weil | {
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| 270 | 9aebd98a | Stefan Weil | char uuid[37]; |
| 271 | 9aebd98a | Stefan Weil | logout("text %s", header->text);
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| 272 | 9aebd98a | Stefan Weil | logout("signature 0x%04x\n", header->signature);
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| 273 | 9aebd98a | Stefan Weil | logout("header size 0x%04x\n", header->header_size);
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| 274 | 9aebd98a | Stefan Weil | logout("image type 0x%04x\n", header->image_type);
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| 275 | 9aebd98a | Stefan Weil | logout("image flags 0x%04x\n", header->image_flags);
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| 276 | 9aebd98a | Stefan Weil | logout("description %s\n", header->description);
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| 277 | 9aebd98a | Stefan Weil | logout("offset bmap 0x%04x\n", header->offset_bmap);
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| 278 | 9aebd98a | Stefan Weil | logout("offset data 0x%04x\n", header->offset_data);
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| 279 | 9aebd98a | Stefan Weil | logout("cylinders 0x%04x\n", header->cylinders);
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| 280 | 9aebd98a | Stefan Weil | logout("heads 0x%04x\n", header->heads);
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| 281 | 9aebd98a | Stefan Weil | logout("sectors 0x%04x\n", header->sectors);
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| 282 | 9aebd98a | Stefan Weil | logout("sector size 0x%04x\n", header->sector_size);
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| 283 | 9aebd98a | Stefan Weil | logout("image size 0x%" PRIx64 " B (%" PRIu64 " MiB)\n", |
| 284 | 9aebd98a | Stefan Weil | header->disk_size, header->disk_size / MiB); |
| 285 | 9aebd98a | Stefan Weil | logout("block size 0x%04x\n", header->block_size);
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| 286 | 9aebd98a | Stefan Weil | logout("block extra 0x%04x\n", header->block_extra);
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| 287 | 9aebd98a | Stefan Weil | logout("blocks tot. 0x%04x\n", header->blocks_in_image);
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| 288 | 9aebd98a | Stefan Weil | logout("blocks all. 0x%04x\n", header->blocks_allocated);
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| 289 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_image, uuid); |
| 290 | 9aebd98a | Stefan Weil | logout("uuid image %s\n", uuid);
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| 291 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_last_snap, uuid); |
| 292 | 9aebd98a | Stefan Weil | logout("uuid snap %s\n", uuid);
|
| 293 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_link, uuid); |
| 294 | 9aebd98a | Stefan Weil | logout("uuid link %s\n", uuid);
|
| 295 | 9aebd98a | Stefan Weil | uuid_unparse(header->uuid_parent, uuid); |
| 296 | 9aebd98a | Stefan Weil | logout("uuid parent %s\n", uuid);
|
| 297 | 9aebd98a | Stefan Weil | } |
| 298 | 9aebd98a | Stefan Weil | #endif
|
| 299 | 9aebd98a | Stefan Weil | |
| 300 | 9ac228e0 | Kevin Wolf | static int vdi_check(BlockDriverState *bs, BdrvCheckResult *res) |
| 301 | 9aebd98a | Stefan Weil | {
|
| 302 | 9aebd98a | Stefan Weil | /* TODO: additional checks possible. */
|
| 303 | 9aebd98a | Stefan Weil | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; |
| 304 | 9aebd98a | Stefan Weil | uint32_t blocks_allocated = 0;
|
| 305 | 9aebd98a | Stefan Weil | uint32_t block; |
| 306 | 9aebd98a | Stefan Weil | uint32_t *bmap; |
| 307 | 9aebd98a | Stefan Weil | logout("\n");
|
| 308 | 9aebd98a | Stefan Weil | |
| 309 | 7267c094 | Anthony Liguori | bmap = g_malloc(s->header.blocks_in_image * sizeof(uint32_t));
|
| 310 | 9aebd98a | Stefan Weil | memset(bmap, 0xff, s->header.blocks_in_image * sizeof(uint32_t)); |
| 311 | 9aebd98a | Stefan Weil | |
| 312 | 9aebd98a | Stefan Weil | /* Check block map and value of blocks_allocated. */
|
| 313 | 9aebd98a | Stefan Weil | for (block = 0; block < s->header.blocks_in_image; block++) { |
| 314 | 9aebd98a | Stefan Weil | uint32_t bmap_entry = le32_to_cpu(s->bmap[block]); |
| 315 | c794b4e0 | Eric Sunshine | if (VDI_IS_ALLOCATED(bmap_entry)) {
|
| 316 | 9aebd98a | Stefan Weil | if (bmap_entry < s->header.blocks_in_image) {
|
| 317 | 9aebd98a | Stefan Weil | blocks_allocated++; |
| 318 | c794b4e0 | Eric Sunshine | if (!VDI_IS_ALLOCATED(bmap[bmap_entry])) {
|
| 319 | 9aebd98a | Stefan Weil | bmap[bmap_entry] = bmap_entry; |
| 320 | 9aebd98a | Stefan Weil | } else {
|
| 321 | 9aebd98a | Stefan Weil | fprintf(stderr, "ERROR: block index %" PRIu32
|
| 322 | 9aebd98a | Stefan Weil | " also used by %" PRIu32 "\n", bmap[bmap_entry], bmap_entry); |
| 323 | 9ac228e0 | Kevin Wolf | res->corruptions++; |
| 324 | 9aebd98a | Stefan Weil | } |
| 325 | 9aebd98a | Stefan Weil | } else {
|
| 326 | 9aebd98a | Stefan Weil | fprintf(stderr, "ERROR: block index %" PRIu32
|
| 327 | 9aebd98a | Stefan Weil | " too large, is %" PRIu32 "\n", block, bmap_entry); |
| 328 | 9ac228e0 | Kevin Wolf | res->corruptions++; |
| 329 | 9aebd98a | Stefan Weil | } |
| 330 | 9aebd98a | Stefan Weil | } |
| 331 | 9aebd98a | Stefan Weil | } |
| 332 | 9aebd98a | Stefan Weil | if (blocks_allocated != s->header.blocks_allocated) {
|
| 333 | 9aebd98a | Stefan Weil | fprintf(stderr, "ERROR: allocated blocks mismatch, is %" PRIu32
|
| 334 | 9aebd98a | Stefan Weil | ", should be %" PRIu32 "\n", |
| 335 | 9aebd98a | Stefan Weil | blocks_allocated, s->header.blocks_allocated); |
| 336 | 9ac228e0 | Kevin Wolf | res->corruptions++; |
| 337 | 9aebd98a | Stefan Weil | } |
| 338 | 9aebd98a | Stefan Weil | |
| 339 | 7267c094 | Anthony Liguori | g_free(bmap); |
| 340 | 9aebd98a | Stefan Weil | |
| 341 | 9ac228e0 | Kevin Wolf | return 0; |
| 342 | 9aebd98a | Stefan Weil | } |
| 343 | 9aebd98a | Stefan Weil | |
| 344 | 9aebd98a | Stefan Weil | static int vdi_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
| 345 | 9aebd98a | Stefan Weil | {
|
| 346 | 9aebd98a | Stefan Weil | /* TODO: vdi_get_info would be needed for machine snapshots.
|
| 347 | 9aebd98a | Stefan Weil | vm_state_offset is still missing. */
|
| 348 | 9aebd98a | Stefan Weil | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; |
| 349 | 9aebd98a | Stefan Weil | logout("\n");
|
| 350 | 9aebd98a | Stefan Weil | bdi->cluster_size = s->block_size; |
| 351 | 9aebd98a | Stefan Weil | bdi->vm_state_offset = 0;
|
| 352 | 9aebd98a | Stefan Weil | return 0; |
| 353 | 9aebd98a | Stefan Weil | } |
| 354 | 9aebd98a | Stefan Weil | |
| 355 | 9aebd98a | Stefan Weil | static int vdi_make_empty(BlockDriverState *bs) |
| 356 | 9aebd98a | Stefan Weil | {
|
| 357 | 9aebd98a | Stefan Weil | /* TODO: missing code. */
|
| 358 | 9aebd98a | Stefan Weil | logout("\n");
|
| 359 | 9aebd98a | Stefan Weil | /* The return value for missing code must be 0, see block.c. */
|
| 360 | 9aebd98a | Stefan Weil | return 0; |
| 361 | 9aebd98a | Stefan Weil | } |
| 362 | 9aebd98a | Stefan Weil | |
| 363 | 9aebd98a | Stefan Weil | static int vdi_probe(const uint8_t *buf, int buf_size, const char *filename) |
| 364 | 9aebd98a | Stefan Weil | {
|
| 365 | 9aebd98a | Stefan Weil | const VdiHeader *header = (const VdiHeader *)buf; |
| 366 | 9aebd98a | Stefan Weil | int result = 0; |
| 367 | 9aebd98a | Stefan Weil | |
| 368 | 9aebd98a | Stefan Weil | logout("\n");
|
| 369 | 9aebd98a | Stefan Weil | |
| 370 | 9aebd98a | Stefan Weil | if (buf_size < sizeof(*header)) { |
| 371 | 9aebd98a | Stefan Weil | /* Header too small, no VDI. */
|
| 372 | 9aebd98a | Stefan Weil | } else if (le32_to_cpu(header->signature) == VDI_SIGNATURE) { |
| 373 | 9aebd98a | Stefan Weil | result = 100;
|
| 374 | 9aebd98a | Stefan Weil | } |
| 375 | 9aebd98a | Stefan Weil | |
| 376 | 9aebd98a | Stefan Weil | if (result == 0) { |
| 377 | 9aebd98a | Stefan Weil | logout("no vdi image\n");
|
| 378 | 9aebd98a | Stefan Weil | } else {
|
| 379 | 9aebd98a | Stefan Weil | logout("%s", header->text);
|
| 380 | 9aebd98a | Stefan Weil | } |
| 381 | 9aebd98a | Stefan Weil | |
| 382 | 9aebd98a | Stefan Weil | return result;
|
| 383 | 9aebd98a | Stefan Weil | } |
| 384 | 9aebd98a | Stefan Weil | |
| 385 | 66f82cee | Kevin Wolf | static int vdi_open(BlockDriverState *bs, int flags) |
| 386 | 9aebd98a | Stefan Weil | {
|
| 387 | 9aebd98a | Stefan Weil | BDRVVdiState *s = bs->opaque; |
| 388 | 9aebd98a | Stefan Weil | VdiHeader header; |
| 389 | 9aebd98a | Stefan Weil | size_t bmap_size; |
| 390 | 9aebd98a | Stefan Weil | |
| 391 | 9aebd98a | Stefan Weil | logout("\n");
|
| 392 | 9aebd98a | Stefan Weil | |
| 393 | 66f82cee | Kevin Wolf | if (bdrv_read(bs->file, 0, (uint8_t *)&header, 1) < 0) { |
| 394 | 9aebd98a | Stefan Weil | goto fail;
|
| 395 | 9aebd98a | Stefan Weil | } |
| 396 | 9aebd98a | Stefan Weil | |
| 397 | 9aebd98a | Stefan Weil | vdi_header_to_cpu(&header); |
| 398 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
|
| 399 | 9aebd98a | Stefan Weil | vdi_header_print(&header); |
| 400 | 9aebd98a | Stefan Weil | #endif
|
| 401 | 9aebd98a | Stefan Weil | |
| 402 | f21dc3a4 | Stefan Weil | if (header.disk_size % SECTOR_SIZE != 0) { |
| 403 | f21dc3a4 | Stefan Weil | /* 'VBoxManage convertfromraw' can create images with odd disk sizes.
|
| 404 | f21dc3a4 | Stefan Weil | We accept them but round the disk size to the next multiple of
|
| 405 | f21dc3a4 | Stefan Weil | SECTOR_SIZE. */
|
| 406 | f21dc3a4 | Stefan Weil | logout("odd disk size %" PRIu64 " B, round up\n", header.disk_size); |
| 407 | f21dc3a4 | Stefan Weil | header.disk_size += SECTOR_SIZE - 1;
|
| 408 | f21dc3a4 | Stefan Weil | header.disk_size &= ~(SECTOR_SIZE - 1);
|
| 409 | f21dc3a4 | Stefan Weil | } |
| 410 | f21dc3a4 | Stefan Weil | |
| 411 | 9aebd98a | Stefan Weil | if (header.version != VDI_VERSION_1_1) {
|
| 412 | 9aebd98a | Stefan Weil | logout("unsupported version %u.%u\n",
|
| 413 | 9aebd98a | Stefan Weil | header.version >> 16, header.version & 0xffff); |
| 414 | 9aebd98a | Stefan Weil | goto fail;
|
| 415 | 9aebd98a | Stefan Weil | } else if (header.offset_bmap % SECTOR_SIZE != 0) { |
| 416 | 9aebd98a | Stefan Weil | /* We only support block maps which start on a sector boundary. */
|
| 417 | 9aebd98a | Stefan Weil | logout("unsupported block map offset 0x%x B\n", header.offset_bmap);
|
| 418 | 9aebd98a | Stefan Weil | goto fail;
|
| 419 | 9aebd98a | Stefan Weil | } else if (header.offset_data % SECTOR_SIZE != 0) { |
| 420 | 9aebd98a | Stefan Weil | /* We only support data blocks which start on a sector boundary. */
|
| 421 | 9aebd98a | Stefan Weil | logout("unsupported data offset 0x%x B\n", header.offset_data);
|
| 422 | 9aebd98a | Stefan Weil | goto fail;
|
| 423 | 9aebd98a | Stefan Weil | } else if (header.sector_size != SECTOR_SIZE) { |
| 424 | 9aebd98a | Stefan Weil | logout("unsupported sector size %u B\n", header.sector_size);
|
| 425 | 9aebd98a | Stefan Weil | goto fail;
|
| 426 | 9aebd98a | Stefan Weil | } else if (header.block_size != 1 * MiB) { |
| 427 | 9aebd98a | Stefan Weil | logout("unsupported block size %u B\n", header.block_size);
|
| 428 | 9aebd98a | Stefan Weil | goto fail;
|
| 429 | f21dc3a4 | Stefan Weil | } else if (header.disk_size > |
| 430 | f21dc3a4 | Stefan Weil | (uint64_t)header.blocks_in_image * header.block_size) {
|
| 431 | f21dc3a4 | Stefan Weil | logout("unsupported disk size %" PRIu64 " B\n", header.disk_size); |
| 432 | 9aebd98a | Stefan Weil | goto fail;
|
| 433 | 9aebd98a | Stefan Weil | } else if (!uuid_is_null(header.uuid_link)) { |
| 434 | 9aebd98a | Stefan Weil | logout("link uuid != 0, unsupported\n");
|
| 435 | 9aebd98a | Stefan Weil | goto fail;
|
| 436 | 9aebd98a | Stefan Weil | } else if (!uuid_is_null(header.uuid_parent)) { |
| 437 | 9aebd98a | Stefan Weil | logout("parent uuid != 0, unsupported\n");
|
| 438 | 9aebd98a | Stefan Weil | goto fail;
|
| 439 | 9aebd98a | Stefan Weil | } |
| 440 | 9aebd98a | Stefan Weil | |
| 441 | 9aebd98a | Stefan Weil | bs->total_sectors = header.disk_size / SECTOR_SIZE; |
| 442 | 9aebd98a | Stefan Weil | |
| 443 | 9aebd98a | Stefan Weil | s->block_size = header.block_size; |
| 444 | 9aebd98a | Stefan Weil | s->block_sectors = header.block_size / SECTOR_SIZE; |
| 445 | 9aebd98a | Stefan Weil | s->bmap_sector = header.offset_bmap / SECTOR_SIZE; |
| 446 | 9aebd98a | Stefan Weil | s->header = header; |
| 447 | 9aebd98a | Stefan Weil | |
| 448 | 9aebd98a | Stefan Weil | bmap_size = header.blocks_in_image * sizeof(uint32_t);
|
| 449 | 6eea90eb | Stefan Weil | bmap_size = (bmap_size + SECTOR_SIZE - 1) / SECTOR_SIZE;
|
| 450 | b76b6e95 | Stefan Weil | if (bmap_size > 0) { |
| 451 | 7267c094 | Anthony Liguori | s->bmap = g_malloc(bmap_size * SECTOR_SIZE); |
| 452 | b76b6e95 | Stefan Weil | } |
| 453 | 66f82cee | Kevin Wolf | if (bdrv_read(bs->file, s->bmap_sector, (uint8_t *)s->bmap, bmap_size) < 0) { |
| 454 | 9aebd98a | Stefan Weil | goto fail_free_bmap;
|
| 455 | 9aebd98a | Stefan Weil | } |
| 456 | 9aebd98a | Stefan Weil | |
| 457 | 9aebd98a | Stefan Weil | return 0; |
| 458 | 9aebd98a | Stefan Weil | |
| 459 | 9aebd98a | Stefan Weil | fail_free_bmap:
|
| 460 | 7267c094 | Anthony Liguori | g_free(s->bmap); |
| 461 | 9aebd98a | Stefan Weil | |
| 462 | 9aebd98a | Stefan Weil | fail:
|
| 463 | 9aebd98a | Stefan Weil | return -1; |
| 464 | 9aebd98a | Stefan Weil | } |
| 465 | 9aebd98a | Stefan Weil | |
| 466 | 9aebd98a | Stefan Weil | static int vdi_is_allocated(BlockDriverState *bs, int64_t sector_num, |
| 467 | 9aebd98a | Stefan Weil | int nb_sectors, int *pnum) |
| 468 | 9aebd98a | Stefan Weil | {
|
| 469 | 9aebd98a | Stefan Weil | /* TODO: Check for too large sector_num (in bdrv_is_allocated or here). */
|
| 470 | 9aebd98a | Stefan Weil | BDRVVdiState *s = (BDRVVdiState *)bs->opaque; |
| 471 | 9aebd98a | Stefan Weil | size_t bmap_index = sector_num / s->block_sectors; |
| 472 | 9aebd98a | Stefan Weil | size_t sector_in_block = sector_num % s->block_sectors; |
| 473 | 9aebd98a | Stefan Weil | int n_sectors = s->block_sectors - sector_in_block;
|
| 474 | 9aebd98a | Stefan Weil | uint32_t bmap_entry = le32_to_cpu(s->bmap[bmap_index]); |
| 475 | 9aebd98a | Stefan Weil | logout("%p, %" PRId64 ", %d, %p\n", bs, sector_num, nb_sectors, pnum); |
| 476 | 9aebd98a | Stefan Weil | if (n_sectors > nb_sectors) {
|
| 477 | 9aebd98a | Stefan Weil | n_sectors = nb_sectors; |
| 478 | 9aebd98a | Stefan Weil | } |
| 479 | 9aebd98a | Stefan Weil | *pnum = n_sectors; |
| 480 | c794b4e0 | Eric Sunshine | return VDI_IS_ALLOCATED(bmap_entry);
|
| 481 | 9aebd98a | Stefan Weil | } |
| 482 | 9aebd98a | Stefan Weil | |
| 483 | 9aebd98a | Stefan Weil | static void vdi_aio_cancel(BlockDriverAIOCB *blockacb) |
| 484 | 9aebd98a | Stefan Weil | {
|
| 485 | 9aebd98a | Stefan Weil | /* TODO: This code is untested. How can I get it executed? */
|
| 486 | b666d239 | Kevin Wolf | VdiAIOCB *acb = container_of(blockacb, VdiAIOCB, common); |
| 487 | 9aebd98a | Stefan Weil | logout("\n");
|
| 488 | 9aebd98a | Stefan Weil | if (acb->hd_aiocb) {
|
| 489 | 9aebd98a | Stefan Weil | bdrv_aio_cancel(acb->hd_aiocb); |
| 490 | 9aebd98a | Stefan Weil | } |
| 491 | 9aebd98a | Stefan Weil | qemu_aio_release(acb); |
| 492 | 9aebd98a | Stefan Weil | } |
| 493 | 9aebd98a | Stefan Weil | |
| 494 | 9aebd98a | Stefan Weil | static AIOPool vdi_aio_pool = {
|
| 495 | 9aebd98a | Stefan Weil | .aiocb_size = sizeof(VdiAIOCB),
|
| 496 | 9aebd98a | Stefan Weil | .cancel = vdi_aio_cancel, |
| 497 | 9aebd98a | Stefan Weil | }; |
| 498 | 9aebd98a | Stefan Weil | |
| 499 | 9aebd98a | Stefan Weil | static VdiAIOCB *vdi_aio_setup(BlockDriverState *bs, int64_t sector_num,
|
| 500 | 9aebd98a | Stefan Weil | QEMUIOVector *qiov, int nb_sectors,
|
| 501 | 9aebd98a | Stefan Weil | BlockDriverCompletionFunc *cb, void *opaque, int is_write) |
| 502 | 9aebd98a | Stefan Weil | {
|
| 503 | 9aebd98a | Stefan Weil | VdiAIOCB *acb; |
| 504 | 9aebd98a | Stefan Weil | |
| 505 | 9aebd98a | Stefan Weil | logout("%p, %" PRId64 ", %p, %d, %p, %p, %d\n", |
| 506 | 9aebd98a | Stefan Weil | bs, sector_num, qiov, nb_sectors, cb, opaque, is_write); |
| 507 | 9aebd98a | Stefan Weil | |
| 508 | 9aebd98a | Stefan Weil | acb = qemu_aio_get(&vdi_aio_pool, bs, cb, opaque); |
| 509 | 9aebd98a | Stefan Weil | if (acb) {
|
| 510 | 9aebd98a | Stefan Weil | acb->hd_aiocb = NULL;
|
| 511 | 9aebd98a | Stefan Weil | acb->sector_num = sector_num; |
| 512 | 9aebd98a | Stefan Weil | acb->qiov = qiov; |
| 513 | e67a64a8 | Kevin Wolf | acb->is_write = is_write; |
| 514 | e67a64a8 | Kevin Wolf | |
| 515 | 9aebd98a | Stefan Weil | if (qiov->niov > 1) { |
| 516 | 9aebd98a | Stefan Weil | acb->buf = qemu_blockalign(bs, qiov->size); |
| 517 | 9aebd98a | Stefan Weil | acb->orig_buf = acb->buf; |
| 518 | 9aebd98a | Stefan Weil | if (is_write) {
|
| 519 | 9aebd98a | Stefan Weil | qemu_iovec_to_buffer(qiov, acb->buf); |
| 520 | 9aebd98a | Stefan Weil | } |
| 521 | 9aebd98a | Stefan Weil | } else {
|
| 522 | 9aebd98a | Stefan Weil | acb->buf = (uint8_t *)qiov->iov->iov_base; |
| 523 | 9aebd98a | Stefan Weil | } |
| 524 | 9aebd98a | Stefan Weil | acb->nb_sectors = nb_sectors; |
| 525 | 9aebd98a | Stefan Weil | acb->n_sectors = 0;
|
| 526 | 9aebd98a | Stefan Weil | acb->bmap_first = VDI_UNALLOCATED; |
| 527 | 9aebd98a | Stefan Weil | acb->bmap_last = VDI_UNALLOCATED; |
| 528 | 9aebd98a | Stefan Weil | acb->block_buffer = NULL;
|
| 529 | 9aebd98a | Stefan Weil | acb->header_modified = 0;
|
| 530 | 9aebd98a | Stefan Weil | } |
| 531 | 9aebd98a | Stefan Weil | return acb;
|
| 532 | 9aebd98a | Stefan Weil | } |
| 533 | 9aebd98a | Stefan Weil | |
| 534 | 9aebd98a | Stefan Weil | static int vdi_schedule_bh(QEMUBHFunc *cb, VdiAIOCB *acb) |
| 535 | 9aebd98a | Stefan Weil | {
|
| 536 | 9aebd98a | Stefan Weil | logout("\n");
|
| 537 | 9aebd98a | Stefan Weil | |
| 538 | 9aebd98a | Stefan Weil | if (acb->bh) {
|
| 539 | 9aebd98a | Stefan Weil | return -EIO;
|
| 540 | 9aebd98a | Stefan Weil | } |
| 541 | 9aebd98a | Stefan Weil | |
| 542 | 9aebd98a | Stefan Weil | acb->bh = qemu_bh_new(cb, acb); |
| 543 | 9aebd98a | Stefan Weil | if (!acb->bh) {
|
| 544 | 9aebd98a | Stefan Weil | return -EIO;
|
| 545 | 9aebd98a | Stefan Weil | } |
| 546 | 9aebd98a | Stefan Weil | |
| 547 | 9aebd98a | Stefan Weil | qemu_bh_schedule(acb->bh); |
| 548 | 9aebd98a | Stefan Weil | |
| 549 | 9aebd98a | Stefan Weil | return 0; |
| 550 | 9aebd98a | Stefan Weil | } |
| 551 | 9aebd98a | Stefan Weil | |
| 552 | 9aebd98a | Stefan Weil | static void vdi_aio_read_cb(void *opaque, int ret); |
| 553 | e67a64a8 | Kevin Wolf | static void vdi_aio_write_cb(void *opaque, int ret); |
| 554 | 9aebd98a | Stefan Weil | |
| 555 | e67a64a8 | Kevin Wolf | static void vdi_aio_rw_bh(void *opaque) |
| 556 | 9aebd98a | Stefan Weil | {
|
| 557 | 9aebd98a | Stefan Weil | VdiAIOCB *acb = opaque; |
| 558 | 9aebd98a | Stefan Weil | logout("\n");
|
| 559 | 9aebd98a | Stefan Weil | qemu_bh_delete(acb->bh); |
| 560 | 9aebd98a | Stefan Weil | acb->bh = NULL;
|
| 561 | e67a64a8 | Kevin Wolf | |
| 562 | e67a64a8 | Kevin Wolf | if (acb->is_write) {
|
| 563 | e67a64a8 | Kevin Wolf | vdi_aio_write_cb(opaque, 0);
|
| 564 | e67a64a8 | Kevin Wolf | } else {
|
| 565 | e67a64a8 | Kevin Wolf | vdi_aio_read_cb(opaque, 0);
|
| 566 | e67a64a8 | Kevin Wolf | } |
| 567 | 9aebd98a | Stefan Weil | } |
| 568 | 9aebd98a | Stefan Weil | |
| 569 | 9aebd98a | Stefan Weil | static void vdi_aio_read_cb(void *opaque, int ret) |
| 570 | 9aebd98a | Stefan Weil | {
|
| 571 | 9aebd98a | Stefan Weil | VdiAIOCB *acb = opaque; |
| 572 | 9aebd98a | Stefan Weil | BlockDriverState *bs = acb->common.bs; |
| 573 | 9aebd98a | Stefan Weil | BDRVVdiState *s = bs->opaque; |
| 574 | 9aebd98a | Stefan Weil | uint32_t bmap_entry; |
| 575 | 9aebd98a | Stefan Weil | uint32_t block_index; |
| 576 | 9aebd98a | Stefan Weil | uint32_t sector_in_block; |
| 577 | 9aebd98a | Stefan Weil | uint32_t n_sectors; |
| 578 | 9aebd98a | Stefan Weil | |
| 579 | 9aebd98a | Stefan Weil | logout("%u sectors read\n", acb->n_sectors);
|
| 580 | 9aebd98a | Stefan Weil | |
| 581 | 9aebd98a | Stefan Weil | acb->hd_aiocb = NULL;
|
| 582 | 9aebd98a | Stefan Weil | |
| 583 | 9aebd98a | Stefan Weil | if (ret < 0) { |
| 584 | 9aebd98a | Stefan Weil | goto done;
|
| 585 | 9aebd98a | Stefan Weil | } |
| 586 | 9aebd98a | Stefan Weil | |
| 587 | 9aebd98a | Stefan Weil | acb->nb_sectors -= acb->n_sectors; |
| 588 | 9aebd98a | Stefan Weil | |
| 589 | 9aebd98a | Stefan Weil | if (acb->nb_sectors == 0) { |
| 590 | 9aebd98a | Stefan Weil | /* request completed */
|
| 591 | 9aebd98a | Stefan Weil | ret = 0;
|
| 592 | 9aebd98a | Stefan Weil | goto done;
|
| 593 | 9aebd98a | Stefan Weil | } |
| 594 | 9aebd98a | Stefan Weil | |
| 595 | 9aebd98a | Stefan Weil | acb->sector_num += acb->n_sectors; |
| 596 | 9aebd98a | Stefan Weil | acb->buf += acb->n_sectors * SECTOR_SIZE; |
| 597 | 9aebd98a | Stefan Weil | |
| 598 | 9aebd98a | Stefan Weil | block_index = acb->sector_num / s->block_sectors; |
| 599 | 9aebd98a | Stefan Weil | sector_in_block = acb->sector_num % s->block_sectors; |
| 600 | 9aebd98a | Stefan Weil | n_sectors = s->block_sectors - sector_in_block; |
| 601 | 9aebd98a | Stefan Weil | if (n_sectors > acb->nb_sectors) {
|
| 602 | 9aebd98a | Stefan Weil | n_sectors = acb->nb_sectors; |
| 603 | 9aebd98a | Stefan Weil | } |
| 604 | 9aebd98a | Stefan Weil | |
| 605 | 9aebd98a | Stefan Weil | logout("will read %u sectors starting at sector %" PRIu64 "\n", |
| 606 | 9aebd98a | Stefan Weil | n_sectors, acb->sector_num); |
| 607 | 9aebd98a | Stefan Weil | |
| 608 | 9aebd98a | Stefan Weil | /* prepare next AIO request */
|
| 609 | 9aebd98a | Stefan Weil | acb->n_sectors = n_sectors; |
| 610 | 9aebd98a | Stefan Weil | bmap_entry = le32_to_cpu(s->bmap[block_index]); |
| 611 | c794b4e0 | Eric Sunshine | if (!VDI_IS_ALLOCATED(bmap_entry)) {
|
| 612 | 9aebd98a | Stefan Weil | /* Block not allocated, return zeros, no need to wait. */
|
| 613 | 9aebd98a | Stefan Weil | memset(acb->buf, 0, n_sectors * SECTOR_SIZE);
|
| 614 | e67a64a8 | Kevin Wolf | ret = vdi_schedule_bh(vdi_aio_rw_bh, acb); |
| 615 | 9aebd98a | Stefan Weil | if (ret < 0) { |
| 616 | 9aebd98a | Stefan Weil | goto done;
|
| 617 | 9aebd98a | Stefan Weil | } |
| 618 | 9aebd98a | Stefan Weil | } else {
|
| 619 | 9aebd98a | Stefan Weil | uint64_t offset = s->header.offset_data / SECTOR_SIZE + |
| 620 | 9aebd98a | Stefan Weil | (uint64_t)bmap_entry * s->block_sectors + |
| 621 | 9aebd98a | Stefan Weil | sector_in_block; |
| 622 | 9aebd98a | Stefan Weil | acb->hd_iov.iov_base = (void *)acb->buf;
|
| 623 | 9aebd98a | Stefan Weil | acb->hd_iov.iov_len = n_sectors * SECTOR_SIZE; |
| 624 | 9aebd98a | Stefan Weil | qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
| 625 | 66f82cee | Kevin Wolf | acb->hd_aiocb = bdrv_aio_readv(bs->file, offset, &acb->hd_qiov, |
| 626 | 9aebd98a | Stefan Weil | n_sectors, vdi_aio_read_cb, acb); |
| 627 | 9aebd98a | Stefan Weil | if (acb->hd_aiocb == NULL) { |
| 628 | 40a892b7 | Stefan Weil | ret = -EIO; |
| 629 | 9aebd98a | Stefan Weil | goto done;
|
| 630 | 9aebd98a | Stefan Weil | } |
| 631 | 9aebd98a | Stefan Weil | } |
| 632 | 9aebd98a | Stefan Weil | return;
|
| 633 | 9aebd98a | Stefan Weil | done:
|
| 634 | 9aebd98a | Stefan Weil | if (acb->qiov->niov > 1) { |
| 635 | 9aebd98a | Stefan Weil | qemu_iovec_from_buffer(acb->qiov, acb->orig_buf, acb->qiov->size); |
| 636 | 9aebd98a | Stefan Weil | qemu_vfree(acb->orig_buf); |
| 637 | 9aebd98a | Stefan Weil | } |
| 638 | 9aebd98a | Stefan Weil | acb->common.cb(acb->common.opaque, ret); |
| 639 | 9aebd98a | Stefan Weil | qemu_aio_release(acb); |
| 640 | 9aebd98a | Stefan Weil | } |
| 641 | 9aebd98a | Stefan Weil | |
| 642 | 9aebd98a | Stefan Weil | static BlockDriverAIOCB *vdi_aio_readv(BlockDriverState *bs,
|
| 643 | 9aebd98a | Stefan Weil | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
| 644 | 9aebd98a | Stefan Weil | BlockDriverCompletionFunc *cb, void *opaque)
|
| 645 | 9aebd98a | Stefan Weil | {
|
| 646 | 9aebd98a | Stefan Weil | VdiAIOCB *acb; |
| 647 | e67a64a8 | Kevin Wolf | int ret;
|
| 648 | e67a64a8 | Kevin Wolf | |
| 649 | 9aebd98a | Stefan Weil | logout("\n");
|
| 650 | 9aebd98a | Stefan Weil | acb = vdi_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque, 0);
|
| 651 | 9aebd98a | Stefan Weil | if (!acb) {
|
| 652 | 9aebd98a | Stefan Weil | return NULL; |
| 653 | 9aebd98a | Stefan Weil | } |
| 654 | e67a64a8 | Kevin Wolf | |
| 655 | e67a64a8 | Kevin Wolf | ret = vdi_schedule_bh(vdi_aio_rw_bh, acb); |
| 656 | e67a64a8 | Kevin Wolf | if (ret < 0) { |
| 657 | e67a64a8 | Kevin Wolf | if (acb->qiov->niov > 1) { |
| 658 | e67a64a8 | Kevin Wolf | qemu_vfree(acb->orig_buf); |
| 659 | e67a64a8 | Kevin Wolf | } |
| 660 | e67a64a8 | Kevin Wolf | qemu_aio_release(acb); |
| 661 | e67a64a8 | Kevin Wolf | return NULL; |
| 662 | e67a64a8 | Kevin Wolf | } |
| 663 | e67a64a8 | Kevin Wolf | |
| 664 | 9aebd98a | Stefan Weil | return &acb->common;
|
| 665 | 9aebd98a | Stefan Weil | } |
| 666 | 9aebd98a | Stefan Weil | |
| 667 | 9aebd98a | Stefan Weil | static void vdi_aio_write_cb(void *opaque, int ret) |
| 668 | 9aebd98a | Stefan Weil | {
|
| 669 | 9aebd98a | Stefan Weil | VdiAIOCB *acb = opaque; |
| 670 | 9aebd98a | Stefan Weil | BlockDriverState *bs = acb->common.bs; |
| 671 | 9aebd98a | Stefan Weil | BDRVVdiState *s = bs->opaque; |
| 672 | 9aebd98a | Stefan Weil | uint32_t bmap_entry; |
| 673 | 9aebd98a | Stefan Weil | uint32_t block_index; |
| 674 | 9aebd98a | Stefan Weil | uint32_t sector_in_block; |
| 675 | 9aebd98a | Stefan Weil | uint32_t n_sectors; |
| 676 | 9aebd98a | Stefan Weil | |
| 677 | 9aebd98a | Stefan Weil | acb->hd_aiocb = NULL;
|
| 678 | 9aebd98a | Stefan Weil | |
| 679 | 9aebd98a | Stefan Weil | if (ret < 0) { |
| 680 | 9aebd98a | Stefan Weil | goto done;
|
| 681 | 9aebd98a | Stefan Weil | } |
| 682 | 9aebd98a | Stefan Weil | |
| 683 | 9aebd98a | Stefan Weil | acb->nb_sectors -= acb->n_sectors; |
| 684 | 9aebd98a | Stefan Weil | acb->sector_num += acb->n_sectors; |
| 685 | 9aebd98a | Stefan Weil | acb->buf += acb->n_sectors * SECTOR_SIZE; |
| 686 | 9aebd98a | Stefan Weil | |
| 687 | 9aebd98a | Stefan Weil | if (acb->nb_sectors == 0) { |
| 688 | 9aebd98a | Stefan Weil | logout("finished data write\n");
|
| 689 | 9aebd98a | Stefan Weil | acb->n_sectors = 0;
|
| 690 | 9aebd98a | Stefan Weil | if (acb->header_modified) {
|
| 691 | 9aebd98a | Stefan Weil | VdiHeader *header = acb->block_buffer; |
| 692 | 9aebd98a | Stefan Weil | logout("now writing modified header\n");
|
| 693 | c794b4e0 | Eric Sunshine | assert(VDI_IS_ALLOCATED(acb->bmap_first)); |
| 694 | 9aebd98a | Stefan Weil | *header = s->header; |
| 695 | 9aebd98a | Stefan Weil | vdi_header_to_le(header); |
| 696 | 9aebd98a | Stefan Weil | acb->header_modified = 0;
|
| 697 | 9aebd98a | Stefan Weil | acb->hd_iov.iov_base = acb->block_buffer; |
| 698 | 9aebd98a | Stefan Weil | acb->hd_iov.iov_len = SECTOR_SIZE; |
| 699 | 9aebd98a | Stefan Weil | qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
| 700 | 66f82cee | Kevin Wolf | acb->hd_aiocb = bdrv_aio_writev(bs->file, 0, &acb->hd_qiov, 1, |
| 701 | 9aebd98a | Stefan Weil | vdi_aio_write_cb, acb); |
| 702 | 9aebd98a | Stefan Weil | if (acb->hd_aiocb == NULL) { |
| 703 | 40a892b7 | Stefan Weil | ret = -EIO; |
| 704 | 9aebd98a | Stefan Weil | goto done;
|
| 705 | 9aebd98a | Stefan Weil | } |
| 706 | 9aebd98a | Stefan Weil | return;
|
| 707 | c794b4e0 | Eric Sunshine | } else if (VDI_IS_ALLOCATED(acb->bmap_first)) { |
| 708 | 9aebd98a | Stefan Weil | /* One or more new blocks were allocated. */
|
| 709 | 9aebd98a | Stefan Weil | uint64_t offset; |
| 710 | 9aebd98a | Stefan Weil | uint32_t bmap_first; |
| 711 | 9aebd98a | Stefan Weil | uint32_t bmap_last; |
| 712 | 7267c094 | Anthony Liguori | g_free(acb->block_buffer); |
| 713 | 9aebd98a | Stefan Weil | acb->block_buffer = NULL;
|
| 714 | 9aebd98a | Stefan Weil | bmap_first = acb->bmap_first; |
| 715 | 9aebd98a | Stefan Weil | bmap_last = acb->bmap_last; |
| 716 | 9aebd98a | Stefan Weil | logout("now writing modified block map entry %u...%u\n",
|
| 717 | 9aebd98a | Stefan Weil | bmap_first, bmap_last); |
| 718 | 9aebd98a | Stefan Weil | /* Write modified sectors from block map. */
|
| 719 | 9aebd98a | Stefan Weil | bmap_first /= (SECTOR_SIZE / sizeof(uint32_t));
|
| 720 | 9aebd98a | Stefan Weil | bmap_last /= (SECTOR_SIZE / sizeof(uint32_t));
|
| 721 | 9aebd98a | Stefan Weil | n_sectors = bmap_last - bmap_first + 1;
|
| 722 | 9aebd98a | Stefan Weil | offset = s->bmap_sector + bmap_first; |
| 723 | 9aebd98a | Stefan Weil | acb->bmap_first = VDI_UNALLOCATED; |
| 724 | a2a45a26 | Blue Swirl | acb->hd_iov.iov_base = (void *)((uint8_t *)&s->bmap[0] + |
| 725 | a2a45a26 | Blue Swirl | bmap_first * SECTOR_SIZE); |
| 726 | 9aebd98a | Stefan Weil | acb->hd_iov.iov_len = n_sectors * SECTOR_SIZE; |
| 727 | 9aebd98a | Stefan Weil | qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
| 728 | 9aebd98a | Stefan Weil | logout("will write %u block map sectors starting from entry %u\n",
|
| 729 | 9aebd98a | Stefan Weil | n_sectors, bmap_first); |
| 730 | 66f82cee | Kevin Wolf | acb->hd_aiocb = bdrv_aio_writev(bs->file, offset, &acb->hd_qiov, |
| 731 | 9aebd98a | Stefan Weil | n_sectors, vdi_aio_write_cb, acb); |
| 732 | 9aebd98a | Stefan Weil | if (acb->hd_aiocb == NULL) { |
| 733 | 40a892b7 | Stefan Weil | ret = -EIO; |
| 734 | 9aebd98a | Stefan Weil | goto done;
|
| 735 | 9aebd98a | Stefan Weil | } |
| 736 | 9aebd98a | Stefan Weil | return;
|
| 737 | 9aebd98a | Stefan Weil | } |
| 738 | 9aebd98a | Stefan Weil | ret = 0;
|
| 739 | 9aebd98a | Stefan Weil | goto done;
|
| 740 | 9aebd98a | Stefan Weil | } |
| 741 | 9aebd98a | Stefan Weil | |
| 742 | 9aebd98a | Stefan Weil | logout("%u sectors written\n", acb->n_sectors);
|
| 743 | 9aebd98a | Stefan Weil | |
| 744 | 9aebd98a | Stefan Weil | block_index = acb->sector_num / s->block_sectors; |
| 745 | 9aebd98a | Stefan Weil | sector_in_block = acb->sector_num % s->block_sectors; |
| 746 | 9aebd98a | Stefan Weil | n_sectors = s->block_sectors - sector_in_block; |
| 747 | 9aebd98a | Stefan Weil | if (n_sectors > acb->nb_sectors) {
|
| 748 | 9aebd98a | Stefan Weil | n_sectors = acb->nb_sectors; |
| 749 | 9aebd98a | Stefan Weil | } |
| 750 | 9aebd98a | Stefan Weil | |
| 751 | 9aebd98a | Stefan Weil | logout("will write %u sectors starting at sector %" PRIu64 "\n", |
| 752 | 9aebd98a | Stefan Weil | n_sectors, acb->sector_num); |
| 753 | 9aebd98a | Stefan Weil | |
| 754 | 9aebd98a | Stefan Weil | /* prepare next AIO request */
|
| 755 | 9aebd98a | Stefan Weil | acb->n_sectors = n_sectors; |
| 756 | 9aebd98a | Stefan Weil | bmap_entry = le32_to_cpu(s->bmap[block_index]); |
| 757 | c794b4e0 | Eric Sunshine | if (!VDI_IS_ALLOCATED(bmap_entry)) {
|
| 758 | 9aebd98a | Stefan Weil | /* Allocate new block and write to it. */
|
| 759 | 9aebd98a | Stefan Weil | uint64_t offset; |
| 760 | 9aebd98a | Stefan Weil | uint8_t *block; |
| 761 | 9aebd98a | Stefan Weil | bmap_entry = s->header.blocks_allocated; |
| 762 | 9aebd98a | Stefan Weil | s->bmap[block_index] = cpu_to_le32(bmap_entry); |
| 763 | 9aebd98a | Stefan Weil | s->header.blocks_allocated++; |
| 764 | 9aebd98a | Stefan Weil | offset = s->header.offset_data / SECTOR_SIZE + |
| 765 | 9aebd98a | Stefan Weil | (uint64_t)bmap_entry * s->block_sectors; |
| 766 | 9aebd98a | Stefan Weil | block = acb->block_buffer; |
| 767 | 9aebd98a | Stefan Weil | if (block == NULL) { |
| 768 | 7267c094 | Anthony Liguori | block = g_malloc0(s->block_size); |
| 769 | 9aebd98a | Stefan Weil | acb->block_buffer = block; |
| 770 | 9aebd98a | Stefan Weil | acb->bmap_first = block_index; |
| 771 | 9aebd98a | Stefan Weil | assert(!acb->header_modified); |
| 772 | 9aebd98a | Stefan Weil | acb->header_modified = 1;
|
| 773 | 9aebd98a | Stefan Weil | } |
| 774 | 9aebd98a | Stefan Weil | acb->bmap_last = block_index; |
| 775 | 9aebd98a | Stefan Weil | memcpy(block + sector_in_block * SECTOR_SIZE, |
| 776 | 9aebd98a | Stefan Weil | acb->buf, n_sectors * SECTOR_SIZE); |
| 777 | a2a45a26 | Blue Swirl | acb->hd_iov.iov_base = (void *)block;
|
| 778 | 9aebd98a | Stefan Weil | acb->hd_iov.iov_len = s->block_size; |
| 779 | 9aebd98a | Stefan Weil | qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
| 780 | 66f82cee | Kevin Wolf | acb->hd_aiocb = bdrv_aio_writev(bs->file, offset, |
| 781 | 9aebd98a | Stefan Weil | &acb->hd_qiov, s->block_sectors, |
| 782 | 9aebd98a | Stefan Weil | vdi_aio_write_cb, acb); |
| 783 | 9aebd98a | Stefan Weil | if (acb->hd_aiocb == NULL) { |
| 784 | 40a892b7 | Stefan Weil | ret = -EIO; |
| 785 | 9aebd98a | Stefan Weil | goto done;
|
| 786 | 9aebd98a | Stefan Weil | } |
| 787 | 9aebd98a | Stefan Weil | } else {
|
| 788 | 9aebd98a | Stefan Weil | uint64_t offset = s->header.offset_data / SECTOR_SIZE + |
| 789 | 9aebd98a | Stefan Weil | (uint64_t)bmap_entry * s->block_sectors + |
| 790 | 9aebd98a | Stefan Weil | sector_in_block; |
| 791 | a2a45a26 | Blue Swirl | acb->hd_iov.iov_base = (void *)acb->buf;
|
| 792 | 9aebd98a | Stefan Weil | acb->hd_iov.iov_len = n_sectors * SECTOR_SIZE; |
| 793 | 9aebd98a | Stefan Weil | qemu_iovec_init_external(&acb->hd_qiov, &acb->hd_iov, 1);
|
| 794 | 66f82cee | Kevin Wolf | acb->hd_aiocb = bdrv_aio_writev(bs->file, offset, &acb->hd_qiov, |
| 795 | 9aebd98a | Stefan Weil | n_sectors, vdi_aio_write_cb, acb); |
| 796 | 9aebd98a | Stefan Weil | if (acb->hd_aiocb == NULL) { |
| 797 | 40a892b7 | Stefan Weil | ret = -EIO; |
| 798 | 9aebd98a | Stefan Weil | goto done;
|
| 799 | 9aebd98a | Stefan Weil | } |
| 800 | 9aebd98a | Stefan Weil | } |
| 801 | 9aebd98a | Stefan Weil | |
| 802 | 9aebd98a | Stefan Weil | return;
|
| 803 | 9aebd98a | Stefan Weil | |
| 804 | 9aebd98a | Stefan Weil | done:
|
| 805 | 9aebd98a | Stefan Weil | if (acb->qiov->niov > 1) { |
| 806 | 9aebd98a | Stefan Weil | qemu_vfree(acb->orig_buf); |
| 807 | 9aebd98a | Stefan Weil | } |
| 808 | 9aebd98a | Stefan Weil | acb->common.cb(acb->common.opaque, ret); |
| 809 | 9aebd98a | Stefan Weil | qemu_aio_release(acb); |
| 810 | 9aebd98a | Stefan Weil | } |
| 811 | 9aebd98a | Stefan Weil | |
| 812 | 9aebd98a | Stefan Weil | static BlockDriverAIOCB *vdi_aio_writev(BlockDriverState *bs,
|
| 813 | 9aebd98a | Stefan Weil | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
|
| 814 | 9aebd98a | Stefan Weil | BlockDriverCompletionFunc *cb, void *opaque)
|
| 815 | 9aebd98a | Stefan Weil | {
|
| 816 | 9aebd98a | Stefan Weil | VdiAIOCB *acb; |
| 817 | e67a64a8 | Kevin Wolf | int ret;
|
| 818 | e67a64a8 | Kevin Wolf | |
| 819 | 9aebd98a | Stefan Weil | logout("\n");
|
| 820 | 9aebd98a | Stefan Weil | acb = vdi_aio_setup(bs, sector_num, qiov, nb_sectors, cb, opaque, 1);
|
| 821 | 9aebd98a | Stefan Weil | if (!acb) {
|
| 822 | 9aebd98a | Stefan Weil | return NULL; |
| 823 | 9aebd98a | Stefan Weil | } |
| 824 | e67a64a8 | Kevin Wolf | |
| 825 | e67a64a8 | Kevin Wolf | ret = vdi_schedule_bh(vdi_aio_rw_bh, acb); |
| 826 | e67a64a8 | Kevin Wolf | if (ret < 0) { |
| 827 | e67a64a8 | Kevin Wolf | if (acb->qiov->niov > 1) { |
| 828 | e67a64a8 | Kevin Wolf | qemu_vfree(acb->orig_buf); |
| 829 | e67a64a8 | Kevin Wolf | } |
| 830 | e67a64a8 | Kevin Wolf | qemu_aio_release(acb); |
| 831 | e67a64a8 | Kevin Wolf | return NULL; |
| 832 | e67a64a8 | Kevin Wolf | } |
| 833 | e67a64a8 | Kevin Wolf | |
| 834 | 9aebd98a | Stefan Weil | return &acb->common;
|
| 835 | 9aebd98a | Stefan Weil | } |
| 836 | 9aebd98a | Stefan Weil | |
| 837 | 9aebd98a | Stefan Weil | static int vdi_create(const char *filename, QEMUOptionParameter *options) |
| 838 | 9aebd98a | Stefan Weil | {
|
| 839 | 9aebd98a | Stefan Weil | int fd;
|
| 840 | 9aebd98a | Stefan Weil | int result = 0; |
| 841 | 9aebd98a | Stefan Weil | uint64_t bytes = 0;
|
| 842 | 9aebd98a | Stefan Weil | uint32_t blocks; |
| 843 | 99cce9fa | Kevin Wolf | size_t block_size = DEFAULT_CLUSTER_SIZE; |
| 844 | 9aebd98a | Stefan Weil | uint32_t image_type = VDI_TYPE_DYNAMIC; |
| 845 | 9aebd98a | Stefan Weil | VdiHeader header; |
| 846 | 9aebd98a | Stefan Weil | size_t i; |
| 847 | 9aebd98a | Stefan Weil | size_t bmap_size; |
| 848 | 9aebd98a | Stefan Weil | uint32_t *bmap; |
| 849 | 9aebd98a | Stefan Weil | |
| 850 | 9aebd98a | Stefan Weil | logout("\n");
|
| 851 | 9aebd98a | Stefan Weil | |
| 852 | 9aebd98a | Stefan Weil | /* Read out options. */
|
| 853 | 9aebd98a | Stefan Weil | while (options && options->name) {
|
| 854 | 9aebd98a | Stefan Weil | if (!strcmp(options->name, BLOCK_OPT_SIZE)) {
|
| 855 | 9aebd98a | Stefan Weil | bytes = options->value.n; |
| 856 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_BLOCK_SIZE)
|
| 857 | 9aebd98a | Stefan Weil | } else if (!strcmp(options->name, BLOCK_OPT_CLUSTER_SIZE)) { |
| 858 | 9aebd98a | Stefan Weil | if (options->value.n) {
|
| 859 | 9aebd98a | Stefan Weil | /* TODO: Additional checks (SECTOR_SIZE * 2^n, ...). */
|
| 860 | 9aebd98a | Stefan Weil | block_size = options->value.n; |
| 861 | 9aebd98a | Stefan Weil | } |
| 862 | 9aebd98a | Stefan Weil | #endif
|
| 863 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_STATIC_IMAGE)
|
| 864 | 9aebd98a | Stefan Weil | } else if (!strcmp(options->name, BLOCK_OPT_STATIC)) { |
| 865 | 6eea90eb | Stefan Weil | if (options->value.n) {
|
| 866 | 6eea90eb | Stefan Weil | image_type = VDI_TYPE_STATIC; |
| 867 | 6eea90eb | Stefan Weil | } |
| 868 | 9aebd98a | Stefan Weil | #endif
|
| 869 | 9aebd98a | Stefan Weil | } |
| 870 | 9aebd98a | Stefan Weil | options++; |
| 871 | 9aebd98a | Stefan Weil | } |
| 872 | 9aebd98a | Stefan Weil | |
| 873 | 9aebd98a | Stefan Weil | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_LARGEFILE, |
| 874 | 9aebd98a | Stefan Weil | 0644);
|
| 875 | 9aebd98a | Stefan Weil | if (fd < 0) { |
| 876 | 9aebd98a | Stefan Weil | return -errno;
|
| 877 | 9aebd98a | Stefan Weil | } |
| 878 | 9aebd98a | Stefan Weil | |
| 879 | f21dc3a4 | Stefan Weil | /* We need enough blocks to store the given disk size,
|
| 880 | f21dc3a4 | Stefan Weil | so always round up. */
|
| 881 | f21dc3a4 | Stefan Weil | blocks = (bytes + block_size - 1) / block_size;
|
| 882 | f21dc3a4 | Stefan Weil | |
| 883 | 9aebd98a | Stefan Weil | bmap_size = blocks * sizeof(uint32_t);
|
| 884 | 9aebd98a | Stefan Weil | bmap_size = ((bmap_size + SECTOR_SIZE - 1) & ~(SECTOR_SIZE -1)); |
| 885 | 9aebd98a | Stefan Weil | |
| 886 | 9aebd98a | Stefan Weil | memset(&header, 0, sizeof(header)); |
| 887 | 1786dc15 | Blue Swirl | pstrcpy(header.text, sizeof(header.text), VDI_TEXT);
|
| 888 | 9aebd98a | Stefan Weil | header.signature = VDI_SIGNATURE; |
| 889 | 9aebd98a | Stefan Weil | header.version = VDI_VERSION_1_1; |
| 890 | 9aebd98a | Stefan Weil | header.header_size = 0x180;
|
| 891 | 9aebd98a | Stefan Weil | header.image_type = image_type; |
| 892 | 9aebd98a | Stefan Weil | header.offset_bmap = 0x200;
|
| 893 | 9aebd98a | Stefan Weil | header.offset_data = 0x200 + bmap_size;
|
| 894 | 9aebd98a | Stefan Weil | header.sector_size = SECTOR_SIZE; |
| 895 | 9aebd98a | Stefan Weil | header.disk_size = bytes; |
| 896 | 9aebd98a | Stefan Weil | header.block_size = block_size; |
| 897 | 9aebd98a | Stefan Weil | header.blocks_in_image = blocks; |
| 898 | 6eea90eb | Stefan Weil | if (image_type == VDI_TYPE_STATIC) {
|
| 899 | 6eea90eb | Stefan Weil | header.blocks_allocated = blocks; |
| 900 | 6eea90eb | Stefan Weil | } |
| 901 | 9aebd98a | Stefan Weil | uuid_generate(header.uuid_image); |
| 902 | 9aebd98a | Stefan Weil | uuid_generate(header.uuid_last_snap); |
| 903 | 9aebd98a | Stefan Weil | /* There is no need to set header.uuid_link or header.uuid_parent here. */
|
| 904 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_DEBUG)
|
| 905 | 9aebd98a | Stefan Weil | vdi_header_print(&header); |
| 906 | 9aebd98a | Stefan Weil | #endif
|
| 907 | 9aebd98a | Stefan Weil | vdi_header_to_le(&header); |
| 908 | 9aebd98a | Stefan Weil | if (write(fd, &header, sizeof(header)) < 0) { |
| 909 | 9aebd98a | Stefan Weil | result = -errno; |
| 910 | 9aebd98a | Stefan Weil | } |
| 911 | 9aebd98a | Stefan Weil | |
| 912 | b76b6e95 | Stefan Weil | bmap = NULL;
|
| 913 | b76b6e95 | Stefan Weil | if (bmap_size > 0) { |
| 914 | 7267c094 | Anthony Liguori | bmap = (uint32_t *)g_malloc0(bmap_size); |
| 915 | b76b6e95 | Stefan Weil | } |
| 916 | 9aebd98a | Stefan Weil | for (i = 0; i < blocks; i++) { |
| 917 | 9aebd98a | Stefan Weil | if (image_type == VDI_TYPE_STATIC) {
|
| 918 | 9aebd98a | Stefan Weil | bmap[i] = i; |
| 919 | 9aebd98a | Stefan Weil | } else {
|
| 920 | 9aebd98a | Stefan Weil | bmap[i] = VDI_UNALLOCATED; |
| 921 | 9aebd98a | Stefan Weil | } |
| 922 | 9aebd98a | Stefan Weil | } |
| 923 | 9aebd98a | Stefan Weil | if (write(fd, bmap, bmap_size) < 0) { |
| 924 | 9aebd98a | Stefan Weil | result = -errno; |
| 925 | 9aebd98a | Stefan Weil | } |
| 926 | 7267c094 | Anthony Liguori | g_free(bmap); |
| 927 | 9aebd98a | Stefan Weil | if (image_type == VDI_TYPE_STATIC) {
|
| 928 | 9aebd98a | Stefan Weil | if (ftruncate(fd, sizeof(header) + bmap_size + blocks * block_size)) { |
| 929 | 9aebd98a | Stefan Weil | result = -errno; |
| 930 | 9aebd98a | Stefan Weil | } |
| 931 | 9aebd98a | Stefan Weil | } |
| 932 | 9aebd98a | Stefan Weil | |
| 933 | 9aebd98a | Stefan Weil | if (close(fd) < 0) { |
| 934 | 9aebd98a | Stefan Weil | result = -errno; |
| 935 | 9aebd98a | Stefan Weil | } |
| 936 | 9aebd98a | Stefan Weil | |
| 937 | 9aebd98a | Stefan Weil | return result;
|
| 938 | 9aebd98a | Stefan Weil | } |
| 939 | 9aebd98a | Stefan Weil | |
| 940 | 9aebd98a | Stefan Weil | static void vdi_close(BlockDriverState *bs) |
| 941 | 9aebd98a | Stefan Weil | {
|
| 942 | 9aebd98a | Stefan Weil | } |
| 943 | 9aebd98a | Stefan Weil | |
| 944 | 8b94ff85 | Paolo Bonzini | static coroutine_fn int vdi_co_flush(BlockDriverState *bs) |
| 945 | 9aebd98a | Stefan Weil | {
|
| 946 | 9aebd98a | Stefan Weil | logout("\n");
|
| 947 | 8b94ff85 | Paolo Bonzini | return bdrv_co_flush(bs->file);
|
| 948 | 9aebd98a | Stefan Weil | } |
| 949 | 9aebd98a | Stefan Weil | |
| 950 | 9aebd98a | Stefan Weil | |
| 951 | 9aebd98a | Stefan Weil | static QEMUOptionParameter vdi_create_options[] = {
|
| 952 | 9aebd98a | Stefan Weil | {
|
| 953 | 9aebd98a | Stefan Weil | .name = BLOCK_OPT_SIZE, |
| 954 | 9aebd98a | Stefan Weil | .type = OPT_SIZE, |
| 955 | 9aebd98a | Stefan Weil | .help = "Virtual disk size"
|
| 956 | 9aebd98a | Stefan Weil | }, |
| 957 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_BLOCK_SIZE)
|
| 958 | 9aebd98a | Stefan Weil | {
|
| 959 | 9aebd98a | Stefan Weil | .name = BLOCK_OPT_CLUSTER_SIZE, |
| 960 | 9aebd98a | Stefan Weil | .type = OPT_SIZE, |
| 961 | 99cce9fa | Kevin Wolf | .help = "VDI cluster (block) size",
|
| 962 | 99cce9fa | Kevin Wolf | .value = { .n = DEFAULT_CLUSTER_SIZE },
|
| 963 | 9aebd98a | Stefan Weil | }, |
| 964 | 9aebd98a | Stefan Weil | #endif
|
| 965 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_STATIC_IMAGE)
|
| 966 | 9aebd98a | Stefan Weil | {
|
| 967 | 9aebd98a | Stefan Weil | .name = BLOCK_OPT_STATIC, |
| 968 | 9aebd98a | Stefan Weil | .type = OPT_FLAG, |
| 969 | 9aebd98a | Stefan Weil | .help = "VDI static (pre-allocated) image"
|
| 970 | 9aebd98a | Stefan Weil | }, |
| 971 | 9aebd98a | Stefan Weil | #endif
|
| 972 | 9aebd98a | Stefan Weil | /* TODO: An additional option to set UUID values might be useful. */
|
| 973 | 9aebd98a | Stefan Weil | { NULL }
|
| 974 | 9aebd98a | Stefan Weil | }; |
| 975 | 9aebd98a | Stefan Weil | |
| 976 | 9aebd98a | Stefan Weil | static BlockDriver bdrv_vdi = {
|
| 977 | 9aebd98a | Stefan Weil | .format_name = "vdi",
|
| 978 | 9aebd98a | Stefan Weil | .instance_size = sizeof(BDRVVdiState),
|
| 979 | 9aebd98a | Stefan Weil | .bdrv_probe = vdi_probe, |
| 980 | 9aebd98a | Stefan Weil | .bdrv_open = vdi_open, |
| 981 | 9aebd98a | Stefan Weil | .bdrv_close = vdi_close, |
| 982 | 9aebd98a | Stefan Weil | .bdrv_create = vdi_create, |
| 983 | 8b94ff85 | Paolo Bonzini | .bdrv_co_flush = vdi_co_flush, |
| 984 | 9aebd98a | Stefan Weil | .bdrv_is_allocated = vdi_is_allocated, |
| 985 | 9aebd98a | Stefan Weil | .bdrv_make_empty = vdi_make_empty, |
| 986 | 9aebd98a | Stefan Weil | |
| 987 | 9aebd98a | Stefan Weil | .bdrv_aio_readv = vdi_aio_readv, |
| 988 | 9aebd98a | Stefan Weil | #if defined(CONFIG_VDI_WRITE)
|
| 989 | 9aebd98a | Stefan Weil | .bdrv_aio_writev = vdi_aio_writev, |
| 990 | 9aebd98a | Stefan Weil | #endif
|
| 991 | 9aebd98a | Stefan Weil | |
| 992 | 9aebd98a | Stefan Weil | .bdrv_get_info = vdi_get_info, |
| 993 | 9aebd98a | Stefan Weil | |
| 994 | 9aebd98a | Stefan Weil | .create_options = vdi_create_options, |
| 995 | 9aebd98a | Stefan Weil | .bdrv_check = vdi_check, |
| 996 | 9aebd98a | Stefan Weil | }; |
| 997 | 9aebd98a | Stefan Weil | |
| 998 | 9aebd98a | Stefan Weil | static void bdrv_vdi_init(void) |
| 999 | 9aebd98a | Stefan Weil | {
|
| 1000 | 9aebd98a | Stefan Weil | logout("\n");
|
| 1001 | 9aebd98a | Stefan Weil | bdrv_register(&bdrv_vdi); |
| 1002 | 9aebd98a | Stefan Weil | } |
| 1003 | 9aebd98a | Stefan Weil | |
| 1004 | 9aebd98a | Stefan Weil | block_init(bdrv_vdi_init); |