bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Block driver for the various disk image formats used by Bochs |
| 3 | * Currently only for "growing" type in read-only mode |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 4 | * |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 5 | * Copyright (c) 2005 Alex Beregszaszi |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 6 | * |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
pbrook | faf0796 | 2007-11-11 02:51:17 +0000 | [diff] [blame] | 25 | #include "qemu-common.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 26 | #include "block/block_int.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 27 | #include "qemu/module.h" |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 28 | |
| 29 | /**************************************************************/ |
| 30 | |
| 31 | #define HEADER_MAGIC "Bochs Virtual HD Image" |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 32 | #define HEADER_VERSION 0x00020000 |
| 33 | #define HEADER_V1 0x00010000 |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 34 | #define HEADER_SIZE 512 |
| 35 | |
| 36 | #define REDOLOG_TYPE "Redolog" |
| 37 | #define GROWING_TYPE "Growing" |
| 38 | |
| 39 | // not allocated: 0xffffffff |
| 40 | |
| 41 | // always little-endian |
| 42 | struct bochs_header { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 43 | char magic[32]; /* "Bochs Virtual HD Image" */ |
| 44 | char type[16]; /* "Redolog" */ |
| 45 | char subtype[16]; /* "Undoable" / "Volatile" / "Growing" */ |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 46 | uint32_t version; |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 47 | uint32_t header; /* size of header */ |
| 48 | |
| 49 | uint32_t catalog; /* num of entries */ |
| 50 | uint32_t bitmap; /* bitmap size */ |
| 51 | uint32_t extent; /* extent size */ |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 52 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 53 | union { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 54 | struct { |
| 55 | uint32_t reserved; /* for ??? */ |
| 56 | uint64_t disk; /* disk size */ |
| 57 | char padding[HEADER_SIZE - 64 - 20 - 12]; |
| 58 | } QEMU_PACKED redolog; |
| 59 | struct { |
| 60 | uint64_t disk; /* disk size */ |
| 61 | char padding[HEADER_SIZE - 64 - 20 - 8]; |
| 62 | } QEMU_PACKED redolog_v1; |
| 63 | char padding[HEADER_SIZE - 64 - 20]; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 64 | } extra; |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 65 | } QEMU_PACKED; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 66 | |
| 67 | typedef struct BDRVBochsState { |
Paolo Bonzini | 848c66e | 2011-10-20 13:16:21 +0200 | [diff] [blame] | 68 | CoMutex lock; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 69 | uint32_t *catalog_bitmap; |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 70 | uint32_t catalog_size; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 71 | |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 72 | uint32_t data_offset; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 73 | |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 74 | uint32_t bitmap_blocks; |
| 75 | uint32_t extent_blocks; |
| 76 | uint32_t extent_size; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 77 | } BDRVBochsState; |
| 78 | |
| 79 | static int bochs_probe(const uint8_t *buf, int buf_size, const char *filename) |
| 80 | { |
| 81 | const struct bochs_header *bochs = (const void *)buf; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 82 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 83 | if (buf_size < HEADER_SIZE) |
| 84 | return 0; |
| 85 | |
| 86 | if (!strcmp(bochs->magic, HEADER_MAGIC) && |
| 87 | !strcmp(bochs->type, REDOLOG_TYPE) && |
| 88 | !strcmp(bochs->subtype, GROWING_TYPE) && |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 89 | ((le32_to_cpu(bochs->version) == HEADER_VERSION) || |
| 90 | (le32_to_cpu(bochs->version) == HEADER_V1))) |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 91 | return 100; |
| 92 | |
| 93 | return 0; |
| 94 | } |
| 95 | |
Max Reitz | 015a103 | 2013-09-05 14:22:29 +0200 | [diff] [blame] | 96 | static int bochs_open(BlockDriverState *bs, QDict *options, int flags, |
| 97 | Error **errp) |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 98 | { |
| 99 | BDRVBochsState *s = bs->opaque; |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 100 | uint32_t i; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 101 | struct bochs_header bochs; |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 102 | int ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 103 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 104 | bs->read_only = 1; // no write support yet |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 105 | |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 106 | ret = bdrv_pread(bs->file, 0, &bochs, sizeof(bochs)); |
| 107 | if (ret < 0) { |
| 108 | return ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | if (strcmp(bochs.magic, HEADER_MAGIC) || |
| 112 | strcmp(bochs.type, REDOLOG_TYPE) || |
| 113 | strcmp(bochs.subtype, GROWING_TYPE) || |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 114 | ((le32_to_cpu(bochs.version) != HEADER_VERSION) && |
| 115 | (le32_to_cpu(bochs.version) != HEADER_V1))) { |
Paolo Bonzini | 76abe40 | 2014-02-17 14:44:06 +0100 | [diff] [blame] | 116 | error_setg(errp, "Image not in Bochs format"); |
| 117 | return -EINVAL; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 118 | } |
| 119 | |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 120 | if (le32_to_cpu(bochs.version) == HEADER_V1) { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 121 | bs->total_sectors = le64_to_cpu(bochs.extra.redolog_v1.disk) / 512; |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 122 | } else { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 123 | bs->total_sectors = le64_to_cpu(bochs.extra.redolog.disk) / 512; |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 124 | } |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 125 | |
Kevin Wolf | e3737b8 | 2014-03-26 13:05:33 +0100 | [diff] [blame] | 126 | /* Limit to 1M entries to avoid unbounded allocation. This is what is |
| 127 | * needed for the largest image that bximage can create (~8 TB). */ |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 128 | s->catalog_size = le32_to_cpu(bochs.catalog); |
Kevin Wolf | e3737b8 | 2014-03-26 13:05:33 +0100 | [diff] [blame] | 129 | if (s->catalog_size > 0x100000) { |
| 130 | error_setg(errp, "Catalog size is too large"); |
| 131 | return -EFBIG; |
| 132 | } |
| 133 | |
Markus Armbruster | 02c4f26 | 2014-08-19 10:31:09 +0200 | [diff] [blame] | 134 | s->catalog_bitmap = g_try_new(uint32_t, s->catalog_size); |
Kevin Wolf | 7bf665e | 2014-05-20 13:21:26 +0200 | [diff] [blame] | 135 | if (s->catalog_size && s->catalog_bitmap == NULL) { |
| 136 | error_setg(errp, "Could not allocate memory for catalog"); |
| 137 | return -ENOMEM; |
| 138 | } |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 139 | |
| 140 | ret = bdrv_pread(bs->file, le32_to_cpu(bochs.header), s->catalog_bitmap, |
| 141 | s->catalog_size * 4); |
| 142 | if (ret < 0) { |
| 143 | goto fail; |
| 144 | } |
| 145 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 146 | for (i = 0; i < s->catalog_size; i++) |
| 147 | le32_to_cpus(&s->catalog_bitmap[i]); |
| 148 | |
| 149 | s->data_offset = le32_to_cpu(bochs.header) + (s->catalog_size * 4); |
| 150 | |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 151 | s->bitmap_blocks = 1 + (le32_to_cpu(bochs.bitmap) - 1) / 512; |
| 152 | s->extent_blocks = 1 + (le32_to_cpu(bochs.extent) - 1) / 512; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 153 | |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 154 | s->extent_size = le32_to_cpu(bochs.extent); |
Kevin Wolf | 715c3f6 | 2014-04-09 12:10:34 +0200 | [diff] [blame] | 155 | if (s->extent_size < BDRV_SECTOR_SIZE) { |
| 156 | /* bximage actually never creates extents smaller than 4k */ |
| 157 | error_setg(errp, "Extent size must be at least 512"); |
| 158 | ret = -EINVAL; |
| 159 | goto fail; |
| 160 | } else if (!is_power_of_2(s->extent_size)) { |
| 161 | error_setg(errp, "Extent size %" PRIu32 " is not a power of two", |
| 162 | s->extent_size); |
Kevin Wolf | 28ec11b | 2014-04-09 11:19:04 +0200 | [diff] [blame] | 163 | ret = -EINVAL; |
| 164 | goto fail; |
Kevin Wolf | 8e53abb | 2014-03-26 13:05:34 +0100 | [diff] [blame] | 165 | } else if (s->extent_size > 0x800000) { |
| 166 | error_setg(errp, "Extent size %" PRIu32 " is too large", |
| 167 | s->extent_size); |
Kevin Wolf | 28ec11b | 2014-04-09 11:19:04 +0200 | [diff] [blame] | 168 | ret = -EINVAL; |
| 169 | goto fail; |
Kevin Wolf | 8e53abb | 2014-03-26 13:05:34 +0100 | [diff] [blame] | 170 | } |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 171 | |
Kevin Wolf | 715c3f6 | 2014-04-09 12:10:34 +0200 | [diff] [blame] | 172 | if (s->catalog_size < DIV_ROUND_UP(bs->total_sectors, |
| 173 | s->extent_size / BDRV_SECTOR_SIZE)) |
| 174 | { |
Kevin Wolf | e3737b8 | 2014-03-26 13:05:33 +0100 | [diff] [blame] | 175 | error_setg(errp, "Catalog size is too small for this disk size"); |
| 176 | ret = -EINVAL; |
| 177 | goto fail; |
| 178 | } |
| 179 | |
Paolo Bonzini | 848c66e | 2011-10-20 13:16:21 +0200 | [diff] [blame] | 180 | qemu_co_mutex_init(&s->lock); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 181 | return 0; |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 182 | |
| 183 | fail: |
| 184 | g_free(s->catalog_bitmap); |
| 185 | return ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 186 | } |
| 187 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 188 | static int64_t seek_to_sector(BlockDriverState *bs, int64_t sector_num) |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 189 | { |
| 190 | BDRVBochsState *s = bs->opaque; |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 191 | uint64_t offset = sector_num * 512; |
| 192 | uint64_t extent_index, extent_offset, bitmap_offset; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 193 | char bitmap_entry; |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 194 | int ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 195 | |
| 196 | // seek to sector |
| 197 | extent_index = offset / s->extent_size; |
| 198 | extent_offset = (offset % s->extent_size) / 512; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 199 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 200 | if (s->catalog_bitmap[extent_index] == 0xffffffff) { |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 201 | return 0; /* not allocated */ |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 202 | } |
| 203 | |
Kevin Wolf | a9ba36a | 2014-03-26 13:05:35 +0100 | [diff] [blame] | 204 | bitmap_offset = s->data_offset + |
| 205 | (512 * (uint64_t) s->catalog_bitmap[extent_index] * |
| 206 | (s->extent_blocks + s->bitmap_blocks)); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 207 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 208 | /* read in bitmap for current extent */ |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 209 | ret = bdrv_pread(bs->file, bitmap_offset + (extent_offset / 8), |
| 210 | &bitmap_entry, 1); |
| 211 | if (ret < 0) { |
| 212 | return ret; |
Blue Swirl | ecbe157 | 2009-12-25 19:27:18 +0000 | [diff] [blame] | 213 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 214 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 215 | if (!((bitmap_entry >> (extent_offset % 8)) & 1)) { |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 216 | return 0; /* not allocated */ |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 217 | } |
| 218 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 219 | return bitmap_offset + (512 * (s->bitmap_blocks + extent_offset)); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 220 | } |
| 221 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 222 | static int bochs_read(BlockDriverState *bs, int64_t sector_num, |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 223 | uint8_t *buf, int nb_sectors) |
| 224 | { |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 225 | int ret; |
| 226 | |
| 227 | while (nb_sectors > 0) { |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 228 | int64_t block_offset = seek_to_sector(bs, sector_num); |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 229 | if (block_offset < 0) { |
| 230 | return block_offset; |
| 231 | } else if (block_offset > 0) { |
Christoph Hellwig | 7a6f391 | 2010-05-04 12:44:21 +0200 | [diff] [blame] | 232 | ret = bdrv_pread(bs->file, block_offset, buf, 512); |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 233 | if (ret < 0) { |
| 234 | return ret; |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 235 | } |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 236 | } else { |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 237 | memset(buf, 0, 512); |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 238 | } |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 239 | nb_sectors--; |
| 240 | sector_num++; |
| 241 | buf += 512; |
| 242 | } |
| 243 | return 0; |
| 244 | } |
| 245 | |
Paolo Bonzini | 2914caa | 2011-10-20 13:16:22 +0200 | [diff] [blame] | 246 | static coroutine_fn int bochs_co_read(BlockDriverState *bs, int64_t sector_num, |
| 247 | uint8_t *buf, int nb_sectors) |
| 248 | { |
| 249 | int ret; |
| 250 | BDRVBochsState *s = bs->opaque; |
| 251 | qemu_co_mutex_lock(&s->lock); |
| 252 | ret = bochs_read(bs, sector_num, buf, nb_sectors); |
| 253 | qemu_co_mutex_unlock(&s->lock); |
| 254 | return ret; |
| 255 | } |
| 256 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 257 | static void bochs_close(BlockDriverState *bs) |
| 258 | { |
| 259 | BDRVBochsState *s = bs->opaque; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 260 | g_free(s->catalog_bitmap); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 261 | } |
| 262 | |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 263 | static BlockDriver bdrv_bochs = { |
aurel32 | e60f469 | 2009-03-07 22:00:29 +0000 | [diff] [blame] | 264 | .format_name = "bochs", |
| 265 | .instance_size = sizeof(BDRVBochsState), |
| 266 | .bdrv_probe = bochs_probe, |
Christoph Hellwig | 7a6f391 | 2010-05-04 12:44:21 +0200 | [diff] [blame] | 267 | .bdrv_open = bochs_open, |
Paolo Bonzini | 2914caa | 2011-10-20 13:16:22 +0200 | [diff] [blame] | 268 | .bdrv_read = bochs_co_read, |
aurel32 | e60f469 | 2009-03-07 22:00:29 +0000 | [diff] [blame] | 269 | .bdrv_close = bochs_close, |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 270 | }; |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 271 | |
| 272 | static void bdrv_bochs_init(void) |
| 273 | { |
| 274 | bdrv_register(&bdrv_bochs); |
| 275 | } |
| 276 | |
| 277 | block_init(bdrv_bochs_init); |