bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 1 | /* |
| 2 | * QEMU System Emulator block driver |
| 3 | * |
| 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 24 | #include "vl.h" |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 25 | #include "block_int.h" |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 26 | |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 27 | #ifdef _BSD |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/stat.h> |
| 30 | #include <sys/ioctl.h> |
| 31 | #include <sys/queue.h> |
| 32 | #include <sys/disk.h> |
| 33 | #endif |
| 34 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 35 | #define SECTOR_BITS 9 |
| 36 | #define SECTOR_SIZE (1 << SECTOR_BITS) |
bellard | 3b0d4f6 | 2005-10-30 18:30:10 +0000 | [diff] [blame] | 37 | |
bellard | 9076542 | 2006-08-07 19:10:16 +0000 | [diff] [blame] | 38 | typedef struct BlockDriverAIOCBSync { |
| 39 | BlockDriverAIOCB common; |
| 40 | QEMUBH *bh; |
| 41 | int ret; |
| 42 | } BlockDriverAIOCBSync; |
| 43 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 44 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
| 45 | int64_t sector_num, uint8_t *buf, int nb_sectors, |
| 46 | BlockDriverCompletionFunc *cb, void *opaque); |
| 47 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
| 48 | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
| 49 | BlockDriverCompletionFunc *cb, void *opaque); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 50 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 51 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
| 52 | uint8_t *buf, int nb_sectors); |
| 53 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
| 54 | const uint8_t *buf, int nb_sectors); |
bellard | ec530c8 | 2006-04-25 22:36:06 +0000 | [diff] [blame] | 55 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 56 | static BlockDriverState *bdrv_first; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 57 | static BlockDriver *first_drv; |
| 58 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 59 | #ifdef _WIN32 |
| 60 | #define PATH_SEP '\\' |
| 61 | #else |
| 62 | #define PATH_SEP '/' |
bellard | 3b0d4f6 | 2005-10-30 18:30:10 +0000 | [diff] [blame] | 63 | #endif |
| 64 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 65 | int path_is_absolute(const char *path) |
| 66 | { |
| 67 | const char *p; |
| 68 | p = strchr(path, ':'); |
| 69 | if (p) |
| 70 | p++; |
| 71 | else |
| 72 | p = path; |
| 73 | return (*p == PATH_SEP); |
| 74 | } |
| 75 | |
| 76 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
| 77 | path to it by considering it is relative to base_path. URL are |
| 78 | supported. */ |
| 79 | void path_combine(char *dest, int dest_size, |
| 80 | const char *base_path, |
| 81 | const char *filename) |
| 82 | { |
| 83 | const char *p, *p1; |
| 84 | int len; |
| 85 | |
| 86 | if (dest_size <= 0) |
| 87 | return; |
| 88 | if (path_is_absolute(filename)) { |
| 89 | pstrcpy(dest, dest_size, filename); |
| 90 | } else { |
| 91 | p = strchr(base_path, ':'); |
| 92 | if (p) |
| 93 | p++; |
| 94 | else |
| 95 | p = base_path; |
| 96 | p1 = strrchr(base_path, PATH_SEP); |
| 97 | if (p1) |
| 98 | p1++; |
| 99 | else |
| 100 | p1 = base_path; |
| 101 | if (p1 > p) |
| 102 | p = p1; |
| 103 | len = p - base_path; |
| 104 | if (len > dest_size - 1) |
| 105 | len = dest_size - 1; |
| 106 | memcpy(dest, base_path, len); |
| 107 | dest[len] = '\0'; |
| 108 | pstrcat(dest, dest_size, filename); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 113 | void bdrv_register(BlockDriver *bdrv) |
| 114 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 115 | if (!bdrv->bdrv_aio_read) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 116 | /* add AIO emulation layer */ |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 117 | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
| 118 | bdrv->bdrv_aio_write = bdrv_aio_write_em; |
| 119 | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; |
bellard | 9076542 | 2006-08-07 19:10:16 +0000 | [diff] [blame] | 120 | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 121 | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
| 122 | /* add synchronous IO emulation layer */ |
| 123 | bdrv->bdrv_read = bdrv_read_em; |
| 124 | bdrv->bdrv_write = bdrv_write_em; |
| 125 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 126 | bdrv->next = first_drv; |
| 127 | first_drv = bdrv; |
| 128 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 129 | |
| 130 | /* create a new block device (by default it is empty) */ |
| 131 | BlockDriverState *bdrv_new(const char *device_name) |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 132 | { |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 133 | BlockDriverState **pbs, *bs; |
| 134 | |
| 135 | bs = qemu_mallocz(sizeof(BlockDriverState)); |
| 136 | if(!bs) |
| 137 | return NULL; |
| 138 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 139 | if (device_name[0] != '\0') { |
| 140 | /* insert at the end */ |
| 141 | pbs = &bdrv_first; |
| 142 | while (*pbs != NULL) |
| 143 | pbs = &(*pbs)->next; |
| 144 | *pbs = bs; |
| 145 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 146 | return bs; |
| 147 | } |
| 148 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 149 | BlockDriver *bdrv_find_format(const char *format_name) |
| 150 | { |
| 151 | BlockDriver *drv1; |
| 152 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
| 153 | if (!strcmp(drv1->format_name, format_name)) |
| 154 | return drv1; |
| 155 | } |
| 156 | return NULL; |
| 157 | } |
| 158 | |
| 159 | int bdrv_create(BlockDriver *drv, |
| 160 | const char *filename, int64_t size_in_sectors, |
| 161 | const char *backing_file, int flags) |
| 162 | { |
| 163 | if (!drv->bdrv_create) |
| 164 | return -ENOTSUP; |
| 165 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); |
| 166 | } |
| 167 | |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 168 | #ifdef _WIN32 |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 169 | void get_tmp_filename(char *filename, int size) |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 170 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 171 | tmpnam(filename); |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 172 | } |
| 173 | #else |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 174 | void get_tmp_filename(char *filename, int size) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 175 | { |
| 176 | int fd; |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 177 | /* XXX: race condition possible */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 178 | pstrcpy(filename, size, "/tmp/vl.XXXXXX"); |
| 179 | fd = mkstemp(filename); |
| 180 | close(fd); |
| 181 | } |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 182 | #endif |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 183 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 184 | #ifdef _WIN32 |
bellard | f45512f | 2006-08-23 21:40:13 +0000 | [diff] [blame] | 185 | static int is_windows_drive_prefix(const char *filename) |
| 186 | { |
| 187 | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
| 188 | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
| 189 | filename[1] == ':'); |
| 190 | } |
| 191 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 192 | static int is_windows_drive(const char *filename) |
| 193 | { |
bellard | f45512f | 2006-08-23 21:40:13 +0000 | [diff] [blame] | 194 | if (is_windows_drive_prefix(filename) && |
| 195 | filename[2] == '\0') |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 196 | return 1; |
| 197 | if (strstart(filename, "\\\\.\\", NULL) || |
| 198 | strstart(filename, "//./", NULL)) |
| 199 | return 1; |
| 200 | return 0; |
| 201 | } |
| 202 | #endif |
| 203 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 204 | static BlockDriver *find_protocol(const char *filename) |
| 205 | { |
| 206 | BlockDriver *drv1; |
| 207 | char protocol[128]; |
| 208 | int len; |
| 209 | const char *p; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 210 | |
| 211 | #ifdef _WIN32 |
bellard | f45512f | 2006-08-23 21:40:13 +0000 | [diff] [blame] | 212 | if (is_windows_drive(filename) || |
| 213 | is_windows_drive_prefix(filename)) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 214 | return &bdrv_raw; |
| 215 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 216 | p = strchr(filename, ':'); |
| 217 | if (!p) |
| 218 | return &bdrv_raw; |
| 219 | len = p - filename; |
| 220 | if (len > sizeof(protocol) - 1) |
| 221 | len = sizeof(protocol) - 1; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 222 | memcpy(protocol, filename, len); |
| 223 | protocol[len] = '\0'; |
| 224 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
| 225 | if (drv1->protocol_name && |
| 226 | !strcmp(drv1->protocol_name, protocol)) |
| 227 | return drv1; |
| 228 | } |
| 229 | return NULL; |
| 230 | } |
| 231 | |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 232 | /* XXX: force raw format if block or character device ? It would |
| 233 | simplify the BSD case */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 234 | static BlockDriver *find_image_format(const char *filename) |
| 235 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 236 | int ret, score, score_max; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 237 | BlockDriver *drv1, *drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 238 | uint8_t buf[2048]; |
| 239 | BlockDriverState *bs; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 240 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 241 | /* detect host devices. By convention, /dev/cdrom[N] is always |
| 242 | recognized as a host CDROM */ |
| 243 | if (strstart(filename, "/dev/cdrom", NULL)) |
| 244 | return &bdrv_host_device; |
| 245 | #ifdef _WIN32 |
| 246 | if (is_windows_drive(filename)) |
| 247 | return &bdrv_host_device; |
| 248 | #else |
| 249 | { |
| 250 | struct stat st; |
| 251 | if (stat(filename, &st) >= 0 && |
| 252 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
| 253 | return &bdrv_host_device; |
| 254 | } |
| 255 | } |
| 256 | #endif |
| 257 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 258 | drv = find_protocol(filename); |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 259 | /* no need to test disk image formats for vvfat */ |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 260 | if (drv == &bdrv_vvfat) |
| 261 | return drv; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 262 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 263 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
| 264 | if (ret < 0) |
| 265 | return NULL; |
| 266 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
| 267 | bdrv_delete(bs); |
| 268 | if (ret < 0) { |
| 269 | return NULL; |
| 270 | } |
| 271 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 272 | score_max = 0; |
| 273 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 274 | if (drv1->bdrv_probe) { |
| 275 | score = drv1->bdrv_probe(buf, ret, filename); |
| 276 | if (score > score_max) { |
| 277 | score_max = score; |
| 278 | drv = drv1; |
| 279 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 280 | } |
| 281 | } |
| 282 | return drv; |
| 283 | } |
| 284 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 285 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 286 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 287 | BlockDriverState *bs; |
| 288 | int ret; |
| 289 | |
| 290 | bs = bdrv_new(""); |
| 291 | if (!bs) |
| 292 | return -ENOMEM; |
| 293 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
| 294 | if (ret < 0) { |
| 295 | bdrv_delete(bs); |
| 296 | return ret; |
bellard | 3b0d4f6 | 2005-10-30 18:30:10 +0000 | [diff] [blame] | 297 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 298 | *pbs = bs; |
| 299 | return 0; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 300 | } |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 301 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 302 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) |
| 303 | { |
| 304 | return bdrv_open2(bs, filename, flags, NULL); |
| 305 | } |
| 306 | |
| 307 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 308 | BlockDriver *drv) |
| 309 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 310 | int ret, open_flags; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 311 | char tmp_filename[1024]; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 312 | char backing_filename[1024]; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 313 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 314 | bs->read_only = 0; |
| 315 | bs->is_temporary = 0; |
| 316 | bs->encrypted = 0; |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 317 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 318 | if (flags & BDRV_O_SNAPSHOT) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 319 | BlockDriverState *bs1; |
| 320 | int64_t total_size; |
| 321 | |
| 322 | /* if snapshot, we create a temporary backing file and open it |
| 323 | instead of opening 'filename' directly */ |
| 324 | |
| 325 | /* if there is a backing file, use it */ |
| 326 | bs1 = bdrv_new(""); |
| 327 | if (!bs1) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 328 | return -ENOMEM; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 329 | } |
| 330 | if (bdrv_open(bs1, filename, 0) < 0) { |
| 331 | bdrv_delete(bs1); |
| 332 | return -1; |
| 333 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 334 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 335 | bdrv_delete(bs1); |
| 336 | |
| 337 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
bellard | a817d93 | 2006-08-24 19:53:37 +0000 | [diff] [blame^] | 338 | realpath(filename, backing_filename); |
bellard | d15a771 | 2006-08-06 13:35:09 +0000 | [diff] [blame] | 339 | if (bdrv_create(&bdrv_qcow2, tmp_filename, |
bellard | a817d93 | 2006-08-24 19:53:37 +0000 | [diff] [blame^] | 340 | total_size, backing_filename, 0) < 0) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 341 | return -1; |
| 342 | } |
| 343 | filename = tmp_filename; |
| 344 | bs->is_temporary = 1; |
| 345 | } |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 346 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 347 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 348 | if (flags & BDRV_O_FILE) { |
| 349 | drv = find_protocol(filename); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 350 | if (!drv) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 351 | return -ENOENT; |
| 352 | } else { |
| 353 | if (!drv) { |
| 354 | drv = find_image_format(filename); |
| 355 | if (!drv) |
| 356 | return -1; |
| 357 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 358 | } |
| 359 | bs->drv = drv; |
| 360 | bs->opaque = qemu_mallocz(drv->instance_size); |
| 361 | if (bs->opaque == NULL && drv->instance_size > 0) |
| 362 | return -1; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 363 | /* Note: for compatibility, we open disk image files as RDWR, and |
| 364 | RDONLY as fallback */ |
| 365 | if (!(flags & BDRV_O_FILE)) |
| 366 | open_flags = BDRV_O_RDWR; |
| 367 | else |
| 368 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
| 369 | ret = drv->bdrv_open(bs, filename, open_flags); |
| 370 | if (ret == -EACCES && !(flags & BDRV_O_FILE)) { |
| 371 | ret = drv->bdrv_open(bs, filename, BDRV_O_RDONLY); |
| 372 | bs->read_only = 1; |
| 373 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 374 | if (ret < 0) { |
| 375 | qemu_free(bs->opaque); |
bellard | 6b21b97 | 2006-08-23 21:14:37 +0000 | [diff] [blame] | 376 | bs->opaque = NULL; |
| 377 | bs->drv = NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 378 | return ret; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 379 | } |
bellard | d15a771 | 2006-08-06 13:35:09 +0000 | [diff] [blame] | 380 | if (drv->bdrv_getlength) { |
| 381 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
| 382 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 383 | #ifndef _WIN32 |
| 384 | if (bs->is_temporary) { |
| 385 | unlink(filename); |
| 386 | } |
| 387 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 388 | if (bs->backing_file[0] != '\0') { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 389 | /* if there is a backing file, use it */ |
| 390 | bs->backing_hd = bdrv_new(""); |
| 391 | if (!bs->backing_hd) { |
| 392 | fail: |
| 393 | bdrv_close(bs); |
bellard | 6b21b97 | 2006-08-23 21:14:37 +0000 | [diff] [blame] | 394 | return -ENOMEM; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 395 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 396 | path_combine(backing_filename, sizeof(backing_filename), |
| 397 | filename, bs->backing_file); |
| 398 | if (bdrv_open(bs->backing_hd, backing_filename, 0) < 0) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 399 | goto fail; |
| 400 | } |
| 401 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 402 | /* call the change callback */ |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 403 | bs->media_changed = 1; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 404 | if (bs->change_cb) |
| 405 | bs->change_cb(bs->change_opaque); |
| 406 | |
| 407 | return 0; |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | void bdrv_close(BlockDriverState *bs) |
| 411 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 412 | if (bs->drv) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 413 | if (bs->backing_hd) |
| 414 | bdrv_delete(bs->backing_hd); |
| 415 | bs->drv->bdrv_close(bs); |
| 416 | qemu_free(bs->opaque); |
| 417 | #ifdef _WIN32 |
| 418 | if (bs->is_temporary) { |
| 419 | unlink(bs->filename); |
| 420 | } |
bellard | 67b915a | 2004-03-31 23:37:16 +0000 | [diff] [blame] | 421 | #endif |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 422 | bs->opaque = NULL; |
| 423 | bs->drv = NULL; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 424 | |
| 425 | /* call the change callback */ |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 426 | bs->media_changed = 1; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 427 | if (bs->change_cb) |
| 428 | bs->change_cb(bs->change_opaque); |
| 429 | } |
| 430 | } |
| 431 | |
| 432 | void bdrv_delete(BlockDriverState *bs) |
| 433 | { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 434 | /* XXX: remove the driver list */ |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 435 | bdrv_close(bs); |
| 436 | qemu_free(bs); |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 437 | } |
| 438 | |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 439 | /* commit COW file into the raw image */ |
| 440 | int bdrv_commit(BlockDriverState *bs) |
| 441 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 442 | BlockDriver *drv = bs->drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 443 | int64_t i, total_sectors; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 444 | int n, j; |
| 445 | unsigned char sector[512]; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 446 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 447 | if (!drv) |
| 448 | return -ENOMEDIUM; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 449 | |
| 450 | if (bs->read_only) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 451 | return -EACCES; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 452 | } |
| 453 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 454 | if (!bs->backing_hd) { |
| 455 | return -ENOTSUP; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 456 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 457 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 458 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
| 459 | for (i = 0; i < total_sectors;) { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 460 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 461 | for(j = 0; j < n; j++) { |
| 462 | if (bdrv_read(bs, i, sector, 1) != 0) { |
| 463 | return -EIO; |
| 464 | } |
| 465 | |
| 466 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
| 467 | return -EIO; |
| 468 | } |
| 469 | i++; |
| 470 | } |
| 471 | } else { |
| 472 | i += n; |
| 473 | } |
| 474 | } |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 475 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 476 | if (drv->bdrv_make_empty) |
| 477 | return drv->bdrv_make_empty(bs); |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 478 | |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 479 | return 0; |
| 480 | } |
| 481 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 482 | /* return < 0 if error. See bdrv_write() for the return codes */ |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 483 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
| 484 | uint8_t *buf, int nb_sectors) |
| 485 | { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 486 | BlockDriver *drv = bs->drv; |
| 487 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 488 | if (!drv) |
| 489 | return -ENOMEDIUM; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 490 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 491 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
bellard | cf98951 | 2004-02-16 21:56:36 +0000 | [diff] [blame] | 492 | memcpy(buf, bs->boot_sector_data, 512); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 493 | sector_num++; |
| 494 | nb_sectors--; |
| 495 | buf += 512; |
| 496 | if (nb_sectors == 0) |
| 497 | return 0; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 498 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 499 | if (drv->bdrv_pread) { |
| 500 | int ret, len; |
| 501 | len = nb_sectors * 512; |
| 502 | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len); |
| 503 | if (ret < 0) |
| 504 | return ret; |
| 505 | else if (ret != len) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 506 | return -EINVAL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 507 | else |
| 508 | return 0; |
| 509 | } else { |
| 510 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
| 511 | } |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 512 | } |
| 513 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 514 | /* Return < 0 if error. Important errors are: |
| 515 | -EIO generic I/O error (may happen for all errors) |
| 516 | -ENOMEDIUM No media inserted. |
| 517 | -EINVAL Invalid sector number or nb_sectors |
| 518 | -EACCES Trying to write a read-only device |
| 519 | */ |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 520 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
| 521 | const uint8_t *buf, int nb_sectors) |
| 522 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 523 | BlockDriver *drv = bs->drv; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 524 | if (!bs->drv) |
| 525 | return -ENOMEDIUM; |
bellard | 0849bf0 | 2003-06-30 23:17:31 +0000 | [diff] [blame] | 526 | if (bs->read_only) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 527 | return -EACCES; |
bellard | 79639d4 | 2005-11-26 10:58:41 +0000 | [diff] [blame] | 528 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
| 529 | memcpy(bs->boot_sector_data, buf, 512); |
| 530 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 531 | if (drv->bdrv_pwrite) { |
| 532 | int ret, len; |
| 533 | len = nb_sectors * 512; |
| 534 | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len); |
| 535 | if (ret < 0) |
| 536 | return ret; |
| 537 | else if (ret != len) |
| 538 | return -EIO; |
| 539 | else |
| 540 | return 0; |
| 541 | } else { |
| 542 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
| 543 | } |
| 544 | } |
| 545 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 546 | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 547 | uint8_t *buf, int count1) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 548 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 549 | uint8_t tmp_buf[SECTOR_SIZE]; |
| 550 | int len, nb_sectors, count; |
| 551 | int64_t sector_num; |
| 552 | |
| 553 | count = count1; |
| 554 | /* first read to align to sector start */ |
| 555 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); |
| 556 | if (len > count) |
| 557 | len = count; |
| 558 | sector_num = offset >> SECTOR_BITS; |
| 559 | if (len > 0) { |
| 560 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 561 | return -EIO; |
| 562 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); |
| 563 | count -= len; |
| 564 | if (count == 0) |
| 565 | return count1; |
| 566 | sector_num++; |
| 567 | buf += len; |
| 568 | } |
| 569 | |
| 570 | /* read the sectors "in place" */ |
| 571 | nb_sectors = count >> SECTOR_BITS; |
| 572 | if (nb_sectors > 0) { |
| 573 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) |
| 574 | return -EIO; |
| 575 | sector_num += nb_sectors; |
| 576 | len = nb_sectors << SECTOR_BITS; |
| 577 | buf += len; |
| 578 | count -= len; |
| 579 | } |
| 580 | |
| 581 | /* add data from the last sector */ |
| 582 | if (count > 0) { |
| 583 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 584 | return -EIO; |
| 585 | memcpy(buf, tmp_buf, count); |
| 586 | } |
| 587 | return count1; |
| 588 | } |
| 589 | |
| 590 | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 591 | const uint8_t *buf, int count1) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 592 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 593 | uint8_t tmp_buf[SECTOR_SIZE]; |
| 594 | int len, nb_sectors, count; |
| 595 | int64_t sector_num; |
| 596 | |
| 597 | count = count1; |
| 598 | /* first write to align to sector start */ |
| 599 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); |
| 600 | if (len > count) |
| 601 | len = count; |
| 602 | sector_num = offset >> SECTOR_BITS; |
| 603 | if (len > 0) { |
| 604 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 605 | return -EIO; |
| 606 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); |
| 607 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
| 608 | return -EIO; |
| 609 | count -= len; |
| 610 | if (count == 0) |
| 611 | return count1; |
| 612 | sector_num++; |
| 613 | buf += len; |
| 614 | } |
| 615 | |
| 616 | /* write the sectors "in place" */ |
| 617 | nb_sectors = count >> SECTOR_BITS; |
| 618 | if (nb_sectors > 0) { |
| 619 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) |
| 620 | return -EIO; |
| 621 | sector_num += nb_sectors; |
| 622 | len = nb_sectors << SECTOR_BITS; |
| 623 | buf += len; |
| 624 | count -= len; |
| 625 | } |
| 626 | |
| 627 | /* add data from the last sector */ |
| 628 | if (count > 0) { |
| 629 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 630 | return -EIO; |
| 631 | memcpy(tmp_buf, buf, count); |
| 632 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
| 633 | return -EIO; |
| 634 | } |
| 635 | return count1; |
| 636 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 637 | |
| 638 | /** |
| 639 | * Read with byte offsets (needed only for file protocols) |
| 640 | */ |
| 641 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
| 642 | void *buf1, int count1) |
| 643 | { |
| 644 | BlockDriver *drv = bs->drv; |
| 645 | |
| 646 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 647 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 648 | if (!drv->bdrv_pread) |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 649 | return bdrv_pread_em(bs, offset, buf1, count1); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 650 | return drv->bdrv_pread(bs, offset, buf1, count1); |
| 651 | } |
| 652 | |
| 653 | /** |
| 654 | * Write with byte offsets (needed only for file protocols) |
| 655 | */ |
| 656 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
| 657 | const void *buf1, int count1) |
| 658 | { |
| 659 | BlockDriver *drv = bs->drv; |
| 660 | |
| 661 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 662 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 663 | if (!drv->bdrv_pwrite) |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 664 | return bdrv_pwrite_em(bs, offset, buf1, count1); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 665 | return drv->bdrv_pwrite(bs, offset, buf1, count1); |
| 666 | } |
| 667 | |
| 668 | /** |
| 669 | * Truncate file to 'offset' bytes (needed only for file protocols) |
| 670 | */ |
| 671 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) |
| 672 | { |
| 673 | BlockDriver *drv = bs->drv; |
| 674 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 675 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 676 | if (!drv->bdrv_truncate) |
| 677 | return -ENOTSUP; |
| 678 | return drv->bdrv_truncate(bs, offset); |
| 679 | } |
| 680 | |
| 681 | /** |
| 682 | * Length of a file in bytes. Return < 0 if error or unknown. |
| 683 | */ |
| 684 | int64_t bdrv_getlength(BlockDriverState *bs) |
| 685 | { |
| 686 | BlockDriver *drv = bs->drv; |
| 687 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 688 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 689 | if (!drv->bdrv_getlength) { |
| 690 | /* legacy mode */ |
| 691 | return bs->total_sectors * SECTOR_SIZE; |
| 692 | } |
| 693 | return drv->bdrv_getlength(bs); |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 694 | } |
| 695 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 696 | /* return 0 as number of sectors if no device present or error */ |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 697 | void bdrv_get_geometry(BlockDriverState *bs, int64_t *nb_sectors_ptr) |
| 698 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 699 | int64_t length; |
| 700 | length = bdrv_getlength(bs); |
| 701 | if (length < 0) |
| 702 | length = 0; |
| 703 | else |
| 704 | length = length >> SECTOR_BITS; |
| 705 | *nb_sectors_ptr = length; |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 706 | } |
bellard | cf98951 | 2004-02-16 21:56:36 +0000 | [diff] [blame] | 707 | |
| 708 | /* force a given boot sector. */ |
| 709 | void bdrv_set_boot_sector(BlockDriverState *bs, const uint8_t *data, int size) |
| 710 | { |
| 711 | bs->boot_sector_enabled = 1; |
| 712 | if (size > 512) |
| 713 | size = 512; |
| 714 | memcpy(bs->boot_sector_data, data, size); |
| 715 | memset(bs->boot_sector_data + size, 0, 512 - size); |
| 716 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 717 | |
| 718 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
| 719 | int cyls, int heads, int secs) |
| 720 | { |
| 721 | bs->cyls = cyls; |
| 722 | bs->heads = heads; |
| 723 | bs->secs = secs; |
| 724 | } |
| 725 | |
| 726 | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
| 727 | { |
| 728 | bs->type = type; |
| 729 | bs->removable = ((type == BDRV_TYPE_CDROM || |
| 730 | type == BDRV_TYPE_FLOPPY)); |
| 731 | } |
| 732 | |
bellard | 46d4767 | 2004-11-16 01:45:27 +0000 | [diff] [blame] | 733 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
| 734 | { |
| 735 | bs->translation = translation; |
| 736 | } |
| 737 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 738 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
| 739 | int *pcyls, int *pheads, int *psecs) |
| 740 | { |
| 741 | *pcyls = bs->cyls; |
| 742 | *pheads = bs->heads; |
| 743 | *psecs = bs->secs; |
| 744 | } |
| 745 | |
| 746 | int bdrv_get_type_hint(BlockDriverState *bs) |
| 747 | { |
| 748 | return bs->type; |
| 749 | } |
| 750 | |
bellard | 46d4767 | 2004-11-16 01:45:27 +0000 | [diff] [blame] | 751 | int bdrv_get_translation_hint(BlockDriverState *bs) |
| 752 | { |
| 753 | return bs->translation; |
| 754 | } |
| 755 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 756 | int bdrv_is_removable(BlockDriverState *bs) |
| 757 | { |
| 758 | return bs->removable; |
| 759 | } |
| 760 | |
| 761 | int bdrv_is_read_only(BlockDriverState *bs) |
| 762 | { |
| 763 | return bs->read_only; |
| 764 | } |
| 765 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 766 | /* XXX: no longer used */ |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 767 | void bdrv_set_change_cb(BlockDriverState *bs, |
| 768 | void (*change_cb)(void *opaque), void *opaque) |
| 769 | { |
| 770 | bs->change_cb = change_cb; |
| 771 | bs->change_opaque = opaque; |
| 772 | } |
| 773 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 774 | int bdrv_is_encrypted(BlockDriverState *bs) |
| 775 | { |
| 776 | if (bs->backing_hd && bs->backing_hd->encrypted) |
| 777 | return 1; |
| 778 | return bs->encrypted; |
| 779 | } |
| 780 | |
| 781 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
| 782 | { |
| 783 | int ret; |
| 784 | if (bs->backing_hd && bs->backing_hd->encrypted) { |
| 785 | ret = bdrv_set_key(bs->backing_hd, key); |
| 786 | if (ret < 0) |
| 787 | return ret; |
| 788 | if (!bs->encrypted) |
| 789 | return 0; |
| 790 | } |
| 791 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) |
| 792 | return -1; |
| 793 | return bs->drv->bdrv_set_key(bs, key); |
| 794 | } |
| 795 | |
| 796 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
| 797 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 798 | if (!bs->drv) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 799 | buf[0] = '\0'; |
| 800 | } else { |
| 801 | pstrcpy(buf, buf_size, bs->drv->format_name); |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
| 806 | void *opaque) |
| 807 | { |
| 808 | BlockDriver *drv; |
| 809 | |
| 810 | for (drv = first_drv; drv != NULL; drv = drv->next) { |
| 811 | it(opaque, drv->format_name); |
| 812 | } |
| 813 | } |
| 814 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 815 | BlockDriverState *bdrv_find(const char *name) |
| 816 | { |
| 817 | BlockDriverState *bs; |
| 818 | |
| 819 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
| 820 | if (!strcmp(name, bs->device_name)) |
| 821 | return bs; |
| 822 | } |
| 823 | return NULL; |
| 824 | } |
| 825 | |
bellard | 81d0912 | 2004-07-14 17:21:37 +0000 | [diff] [blame] | 826 | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
| 827 | { |
| 828 | BlockDriverState *bs; |
| 829 | |
| 830 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
| 831 | it(opaque, bs->device_name); |
| 832 | } |
| 833 | } |
| 834 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 835 | const char *bdrv_get_device_name(BlockDriverState *bs) |
| 836 | { |
| 837 | return bs->device_name; |
| 838 | } |
| 839 | |
pbrook | 7a6cba6 | 2006-06-04 11:39:07 +0000 | [diff] [blame] | 840 | void bdrv_flush(BlockDriverState *bs) |
| 841 | { |
| 842 | if (bs->drv->bdrv_flush) |
| 843 | bs->drv->bdrv_flush(bs); |
| 844 | if (bs->backing_hd) |
| 845 | bdrv_flush(bs->backing_hd); |
| 846 | } |
| 847 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 848 | void bdrv_info(void) |
| 849 | { |
| 850 | BlockDriverState *bs; |
| 851 | |
| 852 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
| 853 | term_printf("%s:", bs->device_name); |
| 854 | term_printf(" type="); |
| 855 | switch(bs->type) { |
| 856 | case BDRV_TYPE_HD: |
| 857 | term_printf("hd"); |
| 858 | break; |
| 859 | case BDRV_TYPE_CDROM: |
| 860 | term_printf("cdrom"); |
| 861 | break; |
| 862 | case BDRV_TYPE_FLOPPY: |
| 863 | term_printf("floppy"); |
| 864 | break; |
| 865 | } |
| 866 | term_printf(" removable=%d", bs->removable); |
| 867 | if (bs->removable) { |
| 868 | term_printf(" locked=%d", bs->locked); |
| 869 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 870 | if (bs->drv) { |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 871 | term_printf(" file=%s", bs->filename); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 872 | if (bs->backing_file[0] != '\0') |
| 873 | term_printf(" backing_file=%s", bs->backing_file); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 874 | term_printf(" ro=%d", bs->read_only); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 875 | term_printf(" drv=%s", bs->drv->format_name); |
| 876 | if (bs->encrypted) |
| 877 | term_printf(" encrypted"); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 878 | } else { |
| 879 | term_printf(" [not inserted]"); |
| 880 | } |
| 881 | term_printf("\n"); |
| 882 | } |
| 883 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 884 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 885 | void bdrv_get_backing_filename(BlockDriverState *bs, |
| 886 | char *filename, int filename_size) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 887 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 888 | if (!bs->backing_hd) { |
| 889 | pstrcpy(filename, filename_size, ""); |
| 890 | } else { |
| 891 | pstrcpy(filename, filename_size, bs->backing_file); |
| 892 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 893 | } |
| 894 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 895 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
| 896 | const uint8_t *buf, int nb_sectors) |
| 897 | { |
| 898 | BlockDriver *drv = bs->drv; |
| 899 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 900 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 901 | if (!drv->bdrv_write_compressed) |
| 902 | return -ENOTSUP; |
| 903 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
| 904 | } |
| 905 | |
| 906 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
| 907 | { |
| 908 | BlockDriver *drv = bs->drv; |
| 909 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 910 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 911 | if (!drv->bdrv_get_info) |
| 912 | return -ENOTSUP; |
| 913 | memset(bdi, 0, sizeof(*bdi)); |
| 914 | return drv->bdrv_get_info(bs, bdi); |
| 915 | } |
| 916 | |
| 917 | /**************************************************************/ |
| 918 | /* handling of snapshots */ |
| 919 | |
| 920 | int bdrv_snapshot_create(BlockDriverState *bs, |
| 921 | QEMUSnapshotInfo *sn_info) |
| 922 | { |
| 923 | BlockDriver *drv = bs->drv; |
| 924 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 925 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 926 | if (!drv->bdrv_snapshot_create) |
| 927 | return -ENOTSUP; |
| 928 | return drv->bdrv_snapshot_create(bs, sn_info); |
| 929 | } |
| 930 | |
| 931 | int bdrv_snapshot_goto(BlockDriverState *bs, |
| 932 | const char *snapshot_id) |
| 933 | { |
| 934 | BlockDriver *drv = bs->drv; |
| 935 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 936 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 937 | if (!drv->bdrv_snapshot_goto) |
| 938 | return -ENOTSUP; |
| 939 | return drv->bdrv_snapshot_goto(bs, snapshot_id); |
| 940 | } |
| 941 | |
| 942 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
| 943 | { |
| 944 | BlockDriver *drv = bs->drv; |
| 945 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 946 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 947 | if (!drv->bdrv_snapshot_delete) |
| 948 | return -ENOTSUP; |
| 949 | return drv->bdrv_snapshot_delete(bs, snapshot_id); |
| 950 | } |
| 951 | |
| 952 | int bdrv_snapshot_list(BlockDriverState *bs, |
| 953 | QEMUSnapshotInfo **psn_info) |
| 954 | { |
| 955 | BlockDriver *drv = bs->drv; |
| 956 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 957 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 958 | if (!drv->bdrv_snapshot_list) |
| 959 | return -ENOTSUP; |
| 960 | return drv->bdrv_snapshot_list(bs, psn_info); |
| 961 | } |
| 962 | |
| 963 | #define NB_SUFFIXES 4 |
| 964 | |
| 965 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
| 966 | { |
| 967 | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
| 968 | int64_t base; |
| 969 | int i; |
| 970 | |
| 971 | if (size <= 999) { |
| 972 | snprintf(buf, buf_size, "%" PRId64, size); |
| 973 | } else { |
| 974 | base = 1024; |
| 975 | for(i = 0; i < NB_SUFFIXES; i++) { |
| 976 | if (size < (10 * base)) { |
| 977 | snprintf(buf, buf_size, "%0.1f%c", |
| 978 | (double)size / base, |
| 979 | suffixes[i]); |
| 980 | break; |
| 981 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
| 982 | snprintf(buf, buf_size, "%" PRId64 "%c", |
| 983 | ((size + (base >> 1)) / base), |
| 984 | suffixes[i]); |
| 985 | break; |
| 986 | } |
| 987 | base = base * 1024; |
| 988 | } |
| 989 | } |
| 990 | return buf; |
| 991 | } |
| 992 | |
| 993 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
| 994 | { |
| 995 | char buf1[128], date_buf[128], clock_buf[128]; |
| 996 | struct tm tm; |
| 997 | time_t ti; |
| 998 | int64_t secs; |
| 999 | |
| 1000 | if (!sn) { |
| 1001 | snprintf(buf, buf_size, |
| 1002 | "%-10s%-20s%7s%20s%15s", |
| 1003 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
| 1004 | } else { |
| 1005 | ti = sn->date_sec; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1006 | #ifndef _WIN32 |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1007 | localtime_r(&ti, &tm); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1008 | #endif |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1009 | strftime(date_buf, sizeof(date_buf), |
| 1010 | "%Y-%m-%d %H:%M:%S", &tm); |
| 1011 | secs = sn->vm_clock_nsec / 1000000000; |
| 1012 | snprintf(clock_buf, sizeof(clock_buf), |
| 1013 | "%02d:%02d:%02d.%03d", |
| 1014 | (int)(secs / 3600), |
| 1015 | (int)((secs / 60) % 60), |
| 1016 | (int)(secs % 60), |
| 1017 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
| 1018 | snprintf(buf, buf_size, |
| 1019 | "%-10s%-20s%7s%20s%15s", |
| 1020 | sn->id_str, sn->name, |
| 1021 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), |
| 1022 | date_buf, |
| 1023 | clock_buf); |
| 1024 | } |
| 1025 | return buf; |
| 1026 | } |
| 1027 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1028 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1029 | /**************************************************************/ |
| 1030 | /* async I/Os */ |
| 1031 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1032 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
| 1033 | uint8_t *buf, int nb_sectors, |
| 1034 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1035 | { |
| 1036 | BlockDriver *drv = bs->drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1037 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1038 | if (!drv) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1039 | return NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1040 | |
| 1041 | /* XXX: we assume that nb_sectors == 0 is suppored by the async read */ |
| 1042 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
| 1043 | memcpy(buf, bs->boot_sector_data, 512); |
| 1044 | sector_num++; |
| 1045 | nb_sectors--; |
| 1046 | buf += 512; |
| 1047 | } |
| 1048 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1049 | return drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1050 | } |
| 1051 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1052 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
| 1053 | const uint8_t *buf, int nb_sectors, |
| 1054 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1055 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1056 | BlockDriver *drv = bs->drv; |
| 1057 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1058 | if (!drv) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1059 | return NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1060 | if (bs->read_only) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1061 | return NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1062 | if (sector_num == 0 && bs->boot_sector_enabled && nb_sectors > 0) { |
| 1063 | memcpy(bs->boot_sector_data, buf, 512); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1064 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1065 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1066 | return drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1067 | } |
| 1068 | |
| 1069 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1070 | { |
| 1071 | BlockDriver *drv = acb->bs->drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1072 | |
| 1073 | drv->bdrv_aio_cancel(acb); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1074 | } |
| 1075 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1076 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1077 | /**************************************************************/ |
| 1078 | /* async block device emulation */ |
| 1079 | |
| 1080 | #ifdef QEMU_TOOL |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1081 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
| 1082 | int64_t sector_num, uint8_t *buf, int nb_sectors, |
| 1083 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1084 | { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1085 | int ret; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1086 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
| 1087 | cb(opaque, ret); |
| 1088 | return NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1089 | } |
| 1090 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1091 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
| 1092 | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
| 1093 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1094 | { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1095 | int ret; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1096 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
| 1097 | cb(opaque, ret); |
| 1098 | return NULL; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1099 | } |
| 1100 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1101 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1102 | { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1103 | } |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 1104 | #else |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1105 | static void bdrv_aio_bh_cb(void *opaque) |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 1106 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1107 | BlockDriverAIOCBSync *acb = opaque; |
| 1108 | acb->common.cb(acb->common.opaque, acb->ret); |
| 1109 | qemu_aio_release(acb); |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 1110 | } |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 1111 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1112 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
| 1113 | int64_t sector_num, uint8_t *buf, int nb_sectors, |
| 1114 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1115 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1116 | BlockDriverAIOCBSync *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1117 | int ret; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1118 | |
| 1119 | acb = qemu_aio_get(bs, cb, opaque); |
| 1120 | if (!acb->bh) |
| 1121 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
| 1122 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
| 1123 | acb->ret = ret; |
| 1124 | qemu_bh_schedule(acb->bh); |
| 1125 | return &acb->common; |
pbrook | 7a6cba6 | 2006-06-04 11:39:07 +0000 | [diff] [blame] | 1126 | } |
| 1127 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1128 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
| 1129 | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
| 1130 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1131 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1132 | BlockDriverAIOCBSync *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1133 | int ret; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1134 | |
| 1135 | acb = qemu_aio_get(bs, cb, opaque); |
| 1136 | if (!acb->bh) |
| 1137 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
| 1138 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
| 1139 | acb->ret = ret; |
| 1140 | qemu_bh_schedule(acb->bh); |
| 1141 | return &acb->common; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1142 | } |
| 1143 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1144 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1145 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1146 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
| 1147 | qemu_bh_cancel(acb->bh); |
| 1148 | qemu_aio_release(acb); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1149 | } |
| 1150 | #endif /* !QEMU_TOOL */ |
| 1151 | |
| 1152 | /**************************************************************/ |
| 1153 | /* sync block device emulation */ |
| 1154 | |
| 1155 | static void bdrv_rw_em_cb(void *opaque, int ret) |
| 1156 | { |
| 1157 | *(int *)opaque = ret; |
| 1158 | } |
| 1159 | |
| 1160 | #define NOT_DONE 0x7fffffff |
| 1161 | |
| 1162 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
| 1163 | uint8_t *buf, int nb_sectors) |
| 1164 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1165 | int async_ret; |
| 1166 | BlockDriverAIOCB *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1167 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1168 | async_ret = NOT_DONE; |
| 1169 | qemu_aio_wait_start(); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1170 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1171 | bdrv_rw_em_cb, &async_ret); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1172 | if (acb == NULL) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1173 | qemu_aio_wait_end(); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1174 | return -1; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1175 | } |
| 1176 | while (async_ret == NOT_DONE) { |
| 1177 | qemu_aio_wait(); |
| 1178 | } |
| 1179 | qemu_aio_wait_end(); |
| 1180 | return async_ret; |
| 1181 | } |
| 1182 | |
| 1183 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
| 1184 | const uint8_t *buf, int nb_sectors) |
| 1185 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1186 | int async_ret; |
| 1187 | BlockDriverAIOCB *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1188 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1189 | async_ret = NOT_DONE; |
| 1190 | qemu_aio_wait_start(); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1191 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1192 | bdrv_rw_em_cb, &async_ret); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1193 | if (acb == NULL) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1194 | qemu_aio_wait_end(); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1195 | return -1; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1196 | } |
| 1197 | while (async_ret == NOT_DONE) { |
| 1198 | qemu_aio_wait(); |
| 1199 | } |
| 1200 | qemu_aio_wait_end(); |
| 1201 | return async_ret; |
| 1202 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1203 | |
| 1204 | void bdrv_init(void) |
| 1205 | { |
| 1206 | bdrv_register(&bdrv_raw); |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1207 | bdrv_register(&bdrv_host_device); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1208 | #ifndef _WIN32 |
| 1209 | bdrv_register(&bdrv_cow); |
| 1210 | #endif |
| 1211 | bdrv_register(&bdrv_qcow); |
| 1212 | bdrv_register(&bdrv_vmdk); |
bellard | 3c56521 | 2004-09-29 21:29:14 +0000 | [diff] [blame] | 1213 | bdrv_register(&bdrv_cloop); |
bellard | 585d0ed | 2004-12-12 11:24:44 +0000 | [diff] [blame] | 1214 | bdrv_register(&bdrv_dmg); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 1215 | bdrv_register(&bdrv_bochs); |
bellard | 6a0f9e8 | 2005-04-27 20:17:58 +0000 | [diff] [blame] | 1216 | bdrv_register(&bdrv_vpc); |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 1217 | bdrv_register(&bdrv_vvfat); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1218 | bdrv_register(&bdrv_qcow2); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1219 | } |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1220 | |
| 1221 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, |
| 1222 | void *opaque) |
| 1223 | { |
| 1224 | BlockDriver *drv; |
| 1225 | BlockDriverAIOCB *acb; |
| 1226 | |
| 1227 | drv = bs->drv; |
| 1228 | if (drv->free_aiocb) { |
| 1229 | acb = drv->free_aiocb; |
| 1230 | drv->free_aiocb = acb->next; |
| 1231 | } else { |
| 1232 | acb = qemu_mallocz(drv->aiocb_size); |
| 1233 | if (!acb) |
| 1234 | return NULL; |
| 1235 | } |
| 1236 | acb->bs = bs; |
| 1237 | acb->cb = cb; |
| 1238 | acb->opaque = opaque; |
| 1239 | return acb; |
| 1240 | } |
| 1241 | |
| 1242 | void qemu_aio_release(void *p) |
| 1243 | { |
| 1244 | BlockDriverAIOCB *acb = p; |
| 1245 | BlockDriver *drv = acb->bs->drv; |
| 1246 | acb->next = drv->free_aiocb; |
| 1247 | drv->free_aiocb = acb; |
| 1248 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1249 | |
| 1250 | /**************************************************************/ |
| 1251 | /* removable device support */ |
| 1252 | |
| 1253 | /** |
| 1254 | * Return TRUE if the media is present |
| 1255 | */ |
| 1256 | int bdrv_is_inserted(BlockDriverState *bs) |
| 1257 | { |
| 1258 | BlockDriver *drv = bs->drv; |
| 1259 | int ret; |
| 1260 | if (!drv) |
| 1261 | return 0; |
| 1262 | if (!drv->bdrv_is_inserted) |
| 1263 | return 1; |
| 1264 | ret = drv->bdrv_is_inserted(bs); |
| 1265 | return ret; |
| 1266 | } |
| 1267 | |
| 1268 | /** |
| 1269 | * Return TRUE if the media changed since the last call to this |
| 1270 | * function. It is currently only used for floppy disks |
| 1271 | */ |
| 1272 | int bdrv_media_changed(BlockDriverState *bs) |
| 1273 | { |
| 1274 | BlockDriver *drv = bs->drv; |
| 1275 | int ret; |
| 1276 | |
| 1277 | if (!drv || !drv->bdrv_media_changed) |
| 1278 | ret = -ENOTSUP; |
| 1279 | else |
| 1280 | ret = drv->bdrv_media_changed(bs); |
| 1281 | if (ret == -ENOTSUP) |
| 1282 | ret = bs->media_changed; |
| 1283 | bs->media_changed = 0; |
| 1284 | return ret; |
| 1285 | } |
| 1286 | |
| 1287 | /** |
| 1288 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray |
| 1289 | */ |
| 1290 | void bdrv_eject(BlockDriverState *bs, int eject_flag) |
| 1291 | { |
| 1292 | BlockDriver *drv = bs->drv; |
| 1293 | int ret; |
| 1294 | |
| 1295 | if (!drv || !drv->bdrv_eject) { |
| 1296 | ret = -ENOTSUP; |
| 1297 | } else { |
| 1298 | ret = drv->bdrv_eject(bs, eject_flag); |
| 1299 | } |
| 1300 | if (ret == -ENOTSUP) { |
| 1301 | if (eject_flag) |
| 1302 | bdrv_close(bs); |
| 1303 | } |
| 1304 | } |
| 1305 | |
| 1306 | int bdrv_is_locked(BlockDriverState *bs) |
| 1307 | { |
| 1308 | return bs->locked; |
| 1309 | } |
| 1310 | |
| 1311 | /** |
| 1312 | * Lock or unlock the media (if it is locked, the user won't be able |
| 1313 | * to eject it manually). |
| 1314 | */ |
| 1315 | void bdrv_set_locked(BlockDriverState *bs, int locked) |
| 1316 | { |
| 1317 | BlockDriver *drv = bs->drv; |
| 1318 | |
| 1319 | bs->locked = locked; |
| 1320 | if (drv && drv->bdrv_set_locked) { |
| 1321 | drv->bdrv_set_locked(bs, locked); |
| 1322 | } |
| 1323 | } |