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 | */ |
Peter Maydell | 80c71a2 | 2016-01-18 18:01:42 +0000 | [diff] [blame] | 25 | #include "qemu/osdep.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 26 | #include "qapi/error.h" |
Markus Armbruster | e2c1c34 | 2022-12-21 14:35:49 +0100 | [diff] [blame] | 27 | #include "block/block-io.h" |
Paolo Bonzini | 737e150 | 2012-12-17 18:19:44 +0100 | [diff] [blame] | 28 | #include "block/block_int.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 29 | #include "qemu/module.h" |
Paolo Bonzini | 58369e2 | 2016-03-15 17:22:36 +0100 | [diff] [blame] | 30 | #include "qemu/bswap.h" |
Kevin Wolf | 398e6ad | 2017-11-07 18:21:41 +0100 | [diff] [blame] | 31 | #include "qemu/error-report.h" |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 32 | |
| 33 | /**************************************************************/ |
| 34 | |
| 35 | #define HEADER_MAGIC "Bochs Virtual HD Image" |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 36 | #define HEADER_VERSION 0x00020000 |
| 37 | #define HEADER_V1 0x00010000 |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 38 | #define HEADER_SIZE 512 |
| 39 | |
| 40 | #define REDOLOG_TYPE "Redolog" |
| 41 | #define GROWING_TYPE "Growing" |
| 42 | |
| 43 | // not allocated: 0xffffffff |
| 44 | |
| 45 | // always little-endian |
| 46 | struct bochs_header { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 47 | char magic[32]; /* "Bochs Virtual HD Image" */ |
| 48 | char type[16]; /* "Redolog" */ |
| 49 | char subtype[16]; /* "Undoable" / "Volatile" / "Growing" */ |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 50 | uint32_t version; |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 51 | uint32_t header; /* size of header */ |
| 52 | |
| 53 | uint32_t catalog; /* num of entries */ |
| 54 | uint32_t bitmap; /* bitmap size */ |
| 55 | uint32_t extent; /* extent size */ |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 56 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 57 | union { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 58 | struct { |
| 59 | uint32_t reserved; /* for ??? */ |
| 60 | uint64_t disk; /* disk size */ |
| 61 | char padding[HEADER_SIZE - 64 - 20 - 12]; |
| 62 | } QEMU_PACKED redolog; |
| 63 | struct { |
| 64 | uint64_t disk; /* disk size */ |
| 65 | char padding[HEADER_SIZE - 64 - 20 - 8]; |
| 66 | } QEMU_PACKED redolog_v1; |
| 67 | char padding[HEADER_SIZE - 64 - 20]; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 68 | } extra; |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 69 | } QEMU_PACKED; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 70 | |
| 71 | typedef struct BDRVBochsState { |
Paolo Bonzini | 848c66e | 2011-10-20 13:16:21 +0200 | [diff] [blame] | 72 | CoMutex lock; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 73 | uint32_t *catalog_bitmap; |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 74 | uint32_t catalog_size; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 75 | |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 76 | uint32_t data_offset; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 77 | |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 78 | uint32_t bitmap_blocks; |
| 79 | uint32_t extent_blocks; |
| 80 | uint32_t extent_size; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 81 | } BDRVBochsState; |
| 82 | |
| 83 | static int bochs_probe(const uint8_t *buf, int buf_size, const char *filename) |
| 84 | { |
| 85 | const struct bochs_header *bochs = (const void *)buf; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 86 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 87 | if (buf_size < HEADER_SIZE) |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 88 | return 0; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 89 | |
| 90 | if (!strcmp(bochs->magic, HEADER_MAGIC) && |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 91 | !strcmp(bochs->type, REDOLOG_TYPE) && |
| 92 | !strcmp(bochs->subtype, GROWING_TYPE) && |
| 93 | ((le32_to_cpu(bochs->version) == HEADER_VERSION) || |
| 94 | (le32_to_cpu(bochs->version) == HEADER_V1))) |
| 95 | return 100; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 96 | |
| 97 | return 0; |
| 98 | } |
| 99 | |
Max Reitz | 015a103 | 2013-09-05 14:22:29 +0200 | [diff] [blame] | 100 | static int bochs_open(BlockDriverState *bs, QDict *options, int flags, |
| 101 | Error **errp) |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 102 | { |
| 103 | BDRVBochsState *s = bs->opaque; |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 104 | uint32_t i; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 105 | struct bochs_header bochs; |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 106 | int ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 107 | |
Kevin Wolf | a4b740d | 2023-10-27 17:53:32 +0200 | [diff] [blame] | 108 | GLOBAL_STATE_CODE(); |
| 109 | |
Kevin Wolf | eaa2410 | 2018-10-12 11:27:41 +0200 | [diff] [blame] | 110 | /* No write support yet */ |
Kevin Wolf | 018f9de | 2023-09-29 16:51:53 +0200 | [diff] [blame] | 111 | bdrv_graph_rdlock_main_loop(); |
Kevin Wolf | eaa2410 | 2018-10-12 11:27:41 +0200 | [diff] [blame] | 112 | ret = bdrv_apply_auto_read_only(bs, NULL, errp); |
Kevin Wolf | 018f9de | 2023-09-29 16:51:53 +0200 | [diff] [blame] | 113 | bdrv_graph_rdunlock_main_loop(); |
Kevin Wolf | eaa2410 | 2018-10-12 11:27:41 +0200 | [diff] [blame] | 114 | if (ret < 0) { |
| 115 | return ret; |
| 116 | } |
| 117 | |
Vladimir Sementsov-Ogievskiy | 8393078 | 2022-07-26 23:11:21 +0300 | [diff] [blame] | 118 | ret = bdrv_open_file_child(NULL, options, "file", bs, errp); |
| 119 | if (ret < 0) { |
| 120 | return ret; |
Kevin Wolf | 4e4bf5c | 2016-12-16 18:52:37 +0100 | [diff] [blame] | 121 | } |
| 122 | |
Kevin Wolf | a4b740d | 2023-10-27 17:53:32 +0200 | [diff] [blame] | 123 | GRAPH_RDLOCK_GUARD_MAINLOOP(); |
| 124 | |
Alberto Faria | 32cc71d | 2022-06-09 16:27:36 +0100 | [diff] [blame] | 125 | ret = bdrv_pread(bs->file, 0, sizeof(bochs), &bochs, 0); |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 126 | if (ret < 0) { |
| 127 | return ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 128 | } |
| 129 | |
| 130 | if (strcmp(bochs.magic, HEADER_MAGIC) || |
| 131 | strcmp(bochs.type, REDOLOG_TYPE) || |
| 132 | strcmp(bochs.subtype, GROWING_TYPE) || |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 133 | ((le32_to_cpu(bochs.version) != HEADER_VERSION) && |
| 134 | (le32_to_cpu(bochs.version) != HEADER_V1))) { |
Paolo Bonzini | 76abe40 | 2014-02-17 14:44:06 +0100 | [diff] [blame] | 135 | error_setg(errp, "Image not in Bochs format"); |
| 136 | return -EINVAL; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 137 | } |
| 138 | |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 139 | if (le32_to_cpu(bochs.version) == HEADER_V1) { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 140 | bs->total_sectors = le64_to_cpu(bochs.extra.redolog_v1.disk) / 512; |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 141 | } else { |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 142 | bs->total_sectors = le64_to_cpu(bochs.extra.redolog.disk) / 512; |
ths | 6850dd9 | 2007-01-05 18:56:04 +0000 | [diff] [blame] | 143 | } |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 144 | |
Kevin Wolf | e3737b8 | 2014-03-26 13:05:33 +0100 | [diff] [blame] | 145 | /* Limit to 1M entries to avoid unbounded allocation. This is what is |
| 146 | * needed for the largest image that bximage can create (~8 TB). */ |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 147 | s->catalog_size = le32_to_cpu(bochs.catalog); |
Kevin Wolf | e3737b8 | 2014-03-26 13:05:33 +0100 | [diff] [blame] | 148 | if (s->catalog_size > 0x100000) { |
| 149 | error_setg(errp, "Catalog size is too large"); |
| 150 | return -EFBIG; |
| 151 | } |
| 152 | |
Markus Armbruster | 02c4f26 | 2014-08-19 10:31:09 +0200 | [diff] [blame] | 153 | s->catalog_bitmap = g_try_new(uint32_t, s->catalog_size); |
Kevin Wolf | 7bf665e | 2014-05-20 13:21:26 +0200 | [diff] [blame] | 154 | if (s->catalog_size && s->catalog_bitmap == NULL) { |
| 155 | error_setg(errp, "Could not allocate memory for catalog"); |
| 156 | return -ENOMEM; |
| 157 | } |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 158 | |
Alberto Faria | 32cc71d | 2022-06-09 16:27:36 +0100 | [diff] [blame] | 159 | ret = bdrv_pread(bs->file, le32_to_cpu(bochs.header), s->catalog_size * 4, |
| 160 | s->catalog_bitmap, 0); |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 161 | if (ret < 0) { |
| 162 | goto fail; |
| 163 | } |
| 164 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 165 | for (i = 0; i < s->catalog_size; i++) |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 166 | le32_to_cpus(&s->catalog_bitmap[i]); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 167 | |
| 168 | s->data_offset = le32_to_cpu(bochs.header) + (s->catalog_size * 4); |
| 169 | |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 170 | s->bitmap_blocks = 1 + (le32_to_cpu(bochs.bitmap) - 1) / 512; |
| 171 | s->extent_blocks = 1 + (le32_to_cpu(bochs.extent) - 1) / 512; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 172 | |
Kevin Wolf | 3dd8a67 | 2014-03-26 13:05:31 +0100 | [diff] [blame] | 173 | s->extent_size = le32_to_cpu(bochs.extent); |
Kevin Wolf | 715c3f6 | 2014-04-09 12:10:34 +0200 | [diff] [blame] | 174 | if (s->extent_size < BDRV_SECTOR_SIZE) { |
| 175 | /* bximage actually never creates extents smaller than 4k */ |
| 176 | error_setg(errp, "Extent size must be at least 512"); |
| 177 | ret = -EINVAL; |
| 178 | goto fail; |
| 179 | } else if (!is_power_of_2(s->extent_size)) { |
| 180 | error_setg(errp, "Extent size %" PRIu32 " is not a power of two", |
| 181 | s->extent_size); |
Kevin Wolf | 28ec11b | 2014-04-09 11:19:04 +0200 | [diff] [blame] | 182 | ret = -EINVAL; |
| 183 | goto fail; |
Kevin Wolf | 8e53abb | 2014-03-26 13:05:34 +0100 | [diff] [blame] | 184 | } else if (s->extent_size > 0x800000) { |
| 185 | error_setg(errp, "Extent size %" PRIu32 " is too large", |
| 186 | s->extent_size); |
Kevin Wolf | 28ec11b | 2014-04-09 11:19:04 +0200 | [diff] [blame] | 187 | ret = -EINVAL; |
| 188 | goto fail; |
Kevin Wolf | 8e53abb | 2014-03-26 13:05:34 +0100 | [diff] [blame] | 189 | } |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 190 | |
Kevin Wolf | 715c3f6 | 2014-04-09 12:10:34 +0200 | [diff] [blame] | 191 | if (s->catalog_size < DIV_ROUND_UP(bs->total_sectors, |
| 192 | s->extent_size / BDRV_SECTOR_SIZE)) |
| 193 | { |
Kevin Wolf | e3737b8 | 2014-03-26 13:05:33 +0100 | [diff] [blame] | 194 | error_setg(errp, "Catalog size is too small for this disk size"); |
| 195 | ret = -EINVAL; |
| 196 | goto fail; |
| 197 | } |
| 198 | |
Paolo Bonzini | 848c66e | 2011-10-20 13:16:21 +0200 | [diff] [blame] | 199 | qemu_co_mutex_init(&s->lock); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 200 | return 0; |
Kevin Wolf | 5b7d7df | 2013-01-25 17:07:27 +0100 | [diff] [blame] | 201 | |
| 202 | fail: |
| 203 | g_free(s->catalog_bitmap); |
| 204 | return ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 205 | } |
| 206 | |
Eric Blake | a650648 | 2016-06-23 16:37:17 -0600 | [diff] [blame] | 207 | static void bochs_refresh_limits(BlockDriverState *bs, Error **errp) |
| 208 | { |
Eric Blake | a5b8dd2 | 2016-06-23 16:37:24 -0600 | [diff] [blame] | 209 | bs->bl.request_alignment = BDRV_SECTOR_SIZE; /* No sub-sector I/O */ |
Eric Blake | a650648 | 2016-06-23 16:37:17 -0600 | [diff] [blame] | 210 | } |
| 211 | |
Paolo Bonzini | e7918e9 | 2023-06-01 13:51:37 +0200 | [diff] [blame] | 212 | static int64_t coroutine_fn GRAPH_RDLOCK |
| 213 | seek_to_sector(BlockDriverState *bs, int64_t sector_num) |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 214 | { |
| 215 | BDRVBochsState *s = bs->opaque; |
Kevin Wolf | 246f658 | 2014-03-26 13:05:32 +0100 | [diff] [blame] | 216 | uint64_t offset = sector_num * 512; |
| 217 | uint64_t extent_index, extent_offset, bitmap_offset; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 218 | char bitmap_entry; |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 219 | int ret; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 220 | |
| 221 | // seek to sector |
| 222 | extent_index = offset / s->extent_size; |
| 223 | extent_offset = (offset % s->extent_size) / 512; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 224 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 225 | if (s->catalog_bitmap[extent_index] == 0xffffffff) { |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 226 | return 0; /* not allocated */ |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 227 | } |
| 228 | |
Kevin Wolf | a9ba36a | 2014-03-26 13:05:35 +0100 | [diff] [blame] | 229 | bitmap_offset = s->data_offset + |
| 230 | (512 * (uint64_t) s->catalog_bitmap[extent_index] * |
| 231 | (s->extent_blocks + s->bitmap_blocks)); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 232 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 233 | /* read in bitmap for current extent */ |
Paolo Bonzini | e7918e9 | 2023-06-01 13:51:37 +0200 | [diff] [blame] | 234 | ret = bdrv_co_pread(bs->file, bitmap_offset + (extent_offset / 8), 1, |
| 235 | &bitmap_entry, 0); |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 236 | if (ret < 0) { |
| 237 | return ret; |
Blue Swirl | ecbe157 | 2009-12-25 19:27:18 +0000 | [diff] [blame] | 238 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 239 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 240 | if (!((bitmap_entry >> (extent_offset % 8)) & 1)) { |
Paolo Bonzini | 7d37435 | 2018-12-13 23:37:37 +0100 | [diff] [blame] | 241 | return 0; /* not allocated */ |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 242 | } |
| 243 | |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 244 | return bitmap_offset + (512 * (s->bitmap_blocks + extent_offset)); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 245 | } |
| 246 | |
Kevin Wolf | b9b10c3 | 2023-02-03 16:21:50 +0100 | [diff] [blame] | 247 | static int coroutine_fn GRAPH_RDLOCK |
Vladimir Sementsov-Ogievskiy | f7ef38d | 2021-09-03 13:27:59 +0300 | [diff] [blame] | 248 | bochs_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes, |
| 249 | QEMUIOVector *qiov, BdrvRequestFlags flags) |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 250 | { |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 251 | BDRVBochsState *s = bs->opaque; |
| 252 | uint64_t sector_num = offset >> BDRV_SECTOR_BITS; |
| 253 | int nb_sectors = bytes >> BDRV_SECTOR_BITS; |
| 254 | uint64_t bytes_done = 0; |
| 255 | QEMUIOVector local_qiov; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 256 | int ret; |
| 257 | |
Nir Soffer | 1bbbf32 | 2019-08-27 21:59:12 +0300 | [diff] [blame] | 258 | assert(QEMU_IS_ALIGNED(offset, BDRV_SECTOR_SIZE)); |
| 259 | assert(QEMU_IS_ALIGNED(bytes, BDRV_SECTOR_SIZE)); |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 260 | |
| 261 | qemu_iovec_init(&local_qiov, qiov->niov); |
| 262 | qemu_co_mutex_lock(&s->lock); |
| 263 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 264 | while (nb_sectors > 0) { |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 265 | int64_t block_offset = seek_to_sector(bs, sector_num); |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 266 | if (block_offset < 0) { |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 267 | ret = block_offset; |
| 268 | goto fail; |
| 269 | } |
| 270 | |
| 271 | qemu_iovec_reset(&local_qiov); |
| 272 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, 512); |
| 273 | |
| 274 | if (block_offset > 0) { |
Kevin Wolf | a03ef88 | 2016-06-20 21:31:46 +0200 | [diff] [blame] | 275 | ret = bdrv_co_preadv(bs->file, block_offset, 512, |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 276 | &local_qiov, 0); |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 277 | if (ret < 0) { |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 278 | goto fail; |
Christoph Hellwig | efbca10 | 2010-05-04 12:44:08 +0200 | [diff] [blame] | 279 | } |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 280 | } else { |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 281 | qemu_iovec_memset(&local_qiov, 0, 0, 512); |
Max Reitz | e1b42f4 | 2014-04-29 19:03:15 +0200 | [diff] [blame] | 282 | } |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 283 | nb_sectors--; |
| 284 | sector_num++; |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 285 | bytes_done += 512; |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 286 | } |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 287 | |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 288 | ret = 0; |
| 289 | fail: |
Paolo Bonzini | 2914caa | 2011-10-20 13:16:22 +0200 | [diff] [blame] | 290 | qemu_co_mutex_unlock(&s->lock); |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 291 | qemu_iovec_destroy(&local_qiov); |
| 292 | |
Paolo Bonzini | 2914caa | 2011-10-20 13:16:22 +0200 | [diff] [blame] | 293 | return ret; |
| 294 | } |
| 295 | |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 296 | static void bochs_close(BlockDriverState *bs) |
| 297 | { |
| 298 | BDRVBochsState *s = bs->opaque; |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 299 | g_free(s->catalog_bitmap); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 300 | } |
| 301 | |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 302 | static BlockDriver bdrv_bochs = { |
aurel32 | e60f469 | 2009-03-07 22:00:29 +0000 | [diff] [blame] | 303 | .format_name = "bochs", |
| 304 | .instance_size = sizeof(BDRVBochsState), |
| 305 | .bdrv_probe = bochs_probe, |
Christoph Hellwig | 7a6f391 | 2010-05-04 12:44:21 +0200 | [diff] [blame] | 306 | .bdrv_open = bochs_open, |
Max Reitz | 69dca43 | 2020-05-13 13:05:39 +0200 | [diff] [blame] | 307 | .bdrv_child_perm = bdrv_default_perms, |
Eric Blake | a650648 | 2016-06-23 16:37:17 -0600 | [diff] [blame] | 308 | .bdrv_refresh_limits = bochs_refresh_limits, |
Kevin Wolf | 3b8fd33 | 2016-04-25 14:53:22 +0200 | [diff] [blame] | 309 | .bdrv_co_preadv = bochs_co_preadv, |
aurel32 | e60f469 | 2009-03-07 22:00:29 +0000 | [diff] [blame] | 310 | .bdrv_close = bochs_close, |
Max Reitz | d67066d | 2020-05-13 13:05:12 +0200 | [diff] [blame] | 311 | .is_format = true, |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 312 | }; |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 313 | |
| 314 | static void bdrv_bochs_init(void) |
| 315 | { |
| 316 | bdrv_register(&bdrv_bochs); |
| 317 | } |
| 318 | |
| 319 | block_init(bdrv_bochs_init); |