bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 1 | /* |
| 2 | * QEMU System Emulator block driver |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 4 | * Copyright (c) 2003 Fabrice Bellard |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 5 | * |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 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 | */ |
blueswir1 | 3990d09 | 2008-12-05 17:53:21 +0000 | [diff] [blame] | 24 | #include "config-host.h" |
| 25 | #ifdef _BSD |
| 26 | /* include native header before sys-queue.h */ |
| 27 | #include <sys/queue.h> |
| 28 | #endif |
| 29 | |
pbrook | faf0796 | 2007-11-11 02:51:17 +0000 | [diff] [blame] | 30 | #include "qemu-common.h" |
pbrook | 87ecb68 | 2007-11-17 17:14:51 +0000 | [diff] [blame] | 31 | #include "console.h" |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 32 | #include "block_int.h" |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 33 | |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 34 | #ifdef _BSD |
| 35 | #include <sys/types.h> |
| 36 | #include <sys/stat.h> |
| 37 | #include <sys/ioctl.h> |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 38 | #include <sys/disk.h> |
| 39 | #endif |
| 40 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 41 | #define SECTOR_BITS 9 |
| 42 | #define SECTOR_SIZE (1 << SECTOR_BITS) |
bellard | 3b0d4f6 | 2005-10-30 18:30:10 +0000 | [diff] [blame] | 43 | |
bellard | 9076542 | 2006-08-07 19:10:16 +0000 | [diff] [blame] | 44 | typedef struct BlockDriverAIOCBSync { |
| 45 | BlockDriverAIOCB common; |
| 46 | QEMUBH *bh; |
| 47 | int ret; |
| 48 | } BlockDriverAIOCBSync; |
| 49 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 50 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
| 51 | int64_t sector_num, uint8_t *buf, int nb_sectors, |
| 52 | BlockDriverCompletionFunc *cb, void *opaque); |
| 53 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
| 54 | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
| 55 | BlockDriverCompletionFunc *cb, void *opaque); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 56 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *acb); |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 57 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 58 | uint8_t *buf, int nb_sectors); |
| 59 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
| 60 | const uint8_t *buf, int nb_sectors); |
bellard | ec530c8 | 2006-04-25 22:36:06 +0000 | [diff] [blame] | 61 | |
blueswir1 | 7ee930d | 2008-09-17 19:04:14 +0000 | [diff] [blame] | 62 | BlockDriverState *bdrv_first; |
| 63 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 64 | static BlockDriver *first_drv; |
| 65 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 66 | int path_is_absolute(const char *path) |
| 67 | { |
| 68 | const char *p; |
bellard | 2166442 | 2007-01-07 18:22:37 +0000 | [diff] [blame] | 69 | #ifdef _WIN32 |
| 70 | /* specific case for names like: "\\.\d:" */ |
| 71 | if (*path == '/' || *path == '\\') |
| 72 | return 1; |
| 73 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 74 | p = strchr(path, ':'); |
| 75 | if (p) |
| 76 | p++; |
| 77 | else |
| 78 | p = path; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 79 | #ifdef _WIN32 |
| 80 | return (*p == '/' || *p == '\\'); |
| 81 | #else |
| 82 | return (*p == '/'); |
| 83 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 84 | } |
| 85 | |
| 86 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
| 87 | path to it by considering it is relative to base_path. URL are |
| 88 | supported. */ |
| 89 | void path_combine(char *dest, int dest_size, |
| 90 | const char *base_path, |
| 91 | const char *filename) |
| 92 | { |
| 93 | const char *p, *p1; |
| 94 | int len; |
| 95 | |
| 96 | if (dest_size <= 0) |
| 97 | return; |
| 98 | if (path_is_absolute(filename)) { |
| 99 | pstrcpy(dest, dest_size, filename); |
| 100 | } else { |
| 101 | p = strchr(base_path, ':'); |
| 102 | if (p) |
| 103 | p++; |
| 104 | else |
| 105 | p = base_path; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 106 | p1 = strrchr(base_path, '/'); |
| 107 | #ifdef _WIN32 |
| 108 | { |
| 109 | const char *p2; |
| 110 | p2 = strrchr(base_path, '\\'); |
| 111 | if (!p1 || p2 > p1) |
| 112 | p1 = p2; |
| 113 | } |
| 114 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 115 | if (p1) |
| 116 | p1++; |
| 117 | else |
| 118 | p1 = base_path; |
| 119 | if (p1 > p) |
| 120 | p = p1; |
| 121 | len = p - base_path; |
| 122 | if (len > dest_size - 1) |
| 123 | len = dest_size - 1; |
| 124 | memcpy(dest, base_path, len); |
| 125 | dest[len] = '\0'; |
| 126 | pstrcat(dest, dest_size, filename); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | |
pbrook | 9596ebb | 2007-11-18 01:44:38 +0000 | [diff] [blame] | 131 | static void bdrv_register(BlockDriver *bdrv) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 132 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 133 | if (!bdrv->bdrv_aio_read) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 134 | /* add AIO emulation layer */ |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 135 | bdrv->bdrv_aio_read = bdrv_aio_read_em; |
| 136 | bdrv->bdrv_aio_write = bdrv_aio_write_em; |
| 137 | bdrv->bdrv_aio_cancel = bdrv_aio_cancel_em; |
bellard | 9076542 | 2006-08-07 19:10:16 +0000 | [diff] [blame] | 138 | bdrv->aiocb_size = sizeof(BlockDriverAIOCBSync); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 139 | } else if (!bdrv->bdrv_read && !bdrv->bdrv_pread) { |
| 140 | /* add synchronous IO emulation layer */ |
| 141 | bdrv->bdrv_read = bdrv_read_em; |
| 142 | bdrv->bdrv_write = bdrv_write_em; |
| 143 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 144 | bdrv->next = first_drv; |
| 145 | first_drv = bdrv; |
| 146 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 147 | |
| 148 | /* create a new block device (by default it is empty) */ |
| 149 | BlockDriverState *bdrv_new(const char *device_name) |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 150 | { |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 151 | BlockDriverState **pbs, *bs; |
| 152 | |
| 153 | bs = qemu_mallocz(sizeof(BlockDriverState)); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 154 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 155 | if (device_name[0] != '\0') { |
| 156 | /* insert at the end */ |
| 157 | pbs = &bdrv_first; |
| 158 | while (*pbs != NULL) |
| 159 | pbs = &(*pbs)->next; |
| 160 | *pbs = bs; |
| 161 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 162 | return bs; |
| 163 | } |
| 164 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 165 | BlockDriver *bdrv_find_format(const char *format_name) |
| 166 | { |
| 167 | BlockDriver *drv1; |
| 168 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
| 169 | if (!strcmp(drv1->format_name, format_name)) |
| 170 | return drv1; |
| 171 | } |
| 172 | return NULL; |
| 173 | } |
| 174 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 175 | int bdrv_create(BlockDriver *drv, |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 176 | const char *filename, int64_t size_in_sectors, |
| 177 | const char *backing_file, int flags) |
| 178 | { |
| 179 | if (!drv->bdrv_create) |
| 180 | return -ENOTSUP; |
| 181 | return drv->bdrv_create(filename, size_in_sectors, backing_file, flags); |
| 182 | } |
| 183 | |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 184 | #ifdef _WIN32 |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 185 | void get_tmp_filename(char *filename, int size) |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 186 | { |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 187 | char temp_dir[MAX_PATH]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 188 | |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 189 | GetTempPath(MAX_PATH, temp_dir); |
| 190 | GetTempFileName(temp_dir, "qem", 0, filename); |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 191 | } |
| 192 | #else |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 193 | void get_tmp_filename(char *filename, int size) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 194 | { |
| 195 | int fd; |
blueswir1 | 7ccfb2e | 2008-09-14 06:45:34 +0000 | [diff] [blame] | 196 | const char *tmpdir; |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 197 | /* XXX: race condition possible */ |
aurel32 | 0badc1e | 2008-03-10 00:05:34 +0000 | [diff] [blame] | 198 | tmpdir = getenv("TMPDIR"); |
| 199 | if (!tmpdir) |
| 200 | tmpdir = "/tmp"; |
| 201 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 202 | fd = mkstemp(filename); |
| 203 | close(fd); |
| 204 | } |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 205 | #endif |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 206 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 207 | #ifdef _WIN32 |
bellard | f45512f | 2006-08-23 21:40:13 +0000 | [diff] [blame] | 208 | static int is_windows_drive_prefix(const char *filename) |
| 209 | { |
| 210 | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
| 211 | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
| 212 | filename[1] == ':'); |
| 213 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 214 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 215 | static int is_windows_drive(const char *filename) |
| 216 | { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 217 | if (is_windows_drive_prefix(filename) && |
bellard | f45512f | 2006-08-23 21:40:13 +0000 | [diff] [blame] | 218 | filename[2] == '\0') |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 219 | return 1; |
| 220 | if (strstart(filename, "\\\\.\\", NULL) || |
| 221 | strstart(filename, "//./", NULL)) |
| 222 | return 1; |
| 223 | return 0; |
| 224 | } |
| 225 | #endif |
| 226 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 227 | static BlockDriver *find_protocol(const char *filename) |
| 228 | { |
| 229 | BlockDriver *drv1; |
| 230 | char protocol[128]; |
| 231 | int len; |
| 232 | const char *p; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 233 | |
| 234 | #ifdef _WIN32 |
bellard | f45512f | 2006-08-23 21:40:13 +0000 | [diff] [blame] | 235 | if (is_windows_drive(filename) || |
| 236 | is_windows_drive_prefix(filename)) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 237 | return &bdrv_raw; |
| 238 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 239 | p = strchr(filename, ':'); |
| 240 | if (!p) |
| 241 | return &bdrv_raw; |
| 242 | len = p - filename; |
| 243 | if (len > sizeof(protocol) - 1) |
| 244 | len = sizeof(protocol) - 1; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 245 | memcpy(protocol, filename, len); |
| 246 | protocol[len] = '\0'; |
| 247 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 248 | if (drv1->protocol_name && |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 249 | !strcmp(drv1->protocol_name, protocol)) |
| 250 | return drv1; |
| 251 | } |
| 252 | return NULL; |
| 253 | } |
| 254 | |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 255 | /* XXX: force raw format if block or character device ? It would |
| 256 | simplify the BSD case */ |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 257 | static BlockDriver *find_image_format(const char *filename) |
| 258 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 259 | int ret, score, score_max; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 260 | BlockDriver *drv1, *drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 261 | uint8_t buf[2048]; |
| 262 | BlockDriverState *bs; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 263 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 264 | /* detect host devices. By convention, /dev/cdrom[N] is always |
| 265 | recognized as a host CDROM */ |
| 266 | if (strstart(filename, "/dev/cdrom", NULL)) |
| 267 | return &bdrv_host_device; |
| 268 | #ifdef _WIN32 |
| 269 | if (is_windows_drive(filename)) |
| 270 | return &bdrv_host_device; |
| 271 | #else |
| 272 | { |
| 273 | struct stat st; |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 274 | if (stat(filename, &st) >= 0 && |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 275 | (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode))) { |
| 276 | return &bdrv_host_device; |
| 277 | } |
| 278 | } |
| 279 | #endif |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 280 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 281 | drv = find_protocol(filename); |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 282 | /* no need to test disk image formats for vvfat */ |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 283 | if (drv == &bdrv_vvfat) |
| 284 | return drv; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 285 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 286 | ret = bdrv_file_open(&bs, filename, BDRV_O_RDONLY); |
| 287 | if (ret < 0) |
| 288 | return NULL; |
| 289 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
| 290 | bdrv_delete(bs); |
| 291 | if (ret < 0) { |
| 292 | return NULL; |
| 293 | } |
| 294 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 295 | score_max = 0; |
| 296 | for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 297 | if (drv1->bdrv_probe) { |
| 298 | score = drv1->bdrv_probe(buf, ret, filename); |
| 299 | if (score > score_max) { |
| 300 | score_max = score; |
| 301 | drv = drv1; |
| 302 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 303 | } |
| 304 | } |
| 305 | return drv; |
| 306 | } |
| 307 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 308 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 309 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 310 | BlockDriverState *bs; |
| 311 | int ret; |
| 312 | |
| 313 | bs = bdrv_new(""); |
| 314 | if (!bs) |
| 315 | return -ENOMEM; |
| 316 | ret = bdrv_open2(bs, filename, flags | BDRV_O_FILE, NULL); |
| 317 | if (ret < 0) { |
| 318 | bdrv_delete(bs); |
| 319 | return ret; |
bellard | 3b0d4f6 | 2005-10-30 18:30:10 +0000 | [diff] [blame] | 320 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 321 | *pbs = bs; |
| 322 | return 0; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 323 | } |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 324 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 325 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags) |
| 326 | { |
| 327 | return bdrv_open2(bs, filename, flags, NULL); |
| 328 | } |
| 329 | |
| 330 | int bdrv_open2(BlockDriverState *bs, const char *filename, int flags, |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 331 | BlockDriver *drv) |
| 332 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 333 | int ret, open_flags; |
ths | eb5c851 | 2007-02-11 15:06:09 +0000 | [diff] [blame] | 334 | char tmp_filename[PATH_MAX]; |
| 335 | char backing_filename[PATH_MAX]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 336 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 337 | bs->read_only = 0; |
| 338 | bs->is_temporary = 0; |
| 339 | bs->encrypted = 0; |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 340 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 341 | if (flags & BDRV_O_SNAPSHOT) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 342 | BlockDriverState *bs1; |
| 343 | int64_t total_size; |
aliguori | 7c96d46 | 2008-09-12 17:54:13 +0000 | [diff] [blame] | 344 | int is_protocol = 0; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 345 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 346 | /* if snapshot, we create a temporary backing file and open it |
| 347 | instead of opening 'filename' directly */ |
| 348 | |
| 349 | /* if there is a backing file, use it */ |
| 350 | bs1 = bdrv_new(""); |
| 351 | if (!bs1) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 352 | return -ENOMEM; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 353 | } |
| 354 | if (bdrv_open(bs1, filename, 0) < 0) { |
| 355 | bdrv_delete(bs1); |
| 356 | return -1; |
| 357 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 358 | total_size = bdrv_getlength(bs1) >> SECTOR_BITS; |
aliguori | 7c96d46 | 2008-09-12 17:54:13 +0000 | [diff] [blame] | 359 | |
| 360 | if (bs1->drv && bs1->drv->protocol_name) |
| 361 | is_protocol = 1; |
| 362 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 363 | bdrv_delete(bs1); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 364 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 365 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
aliguori | 7c96d46 | 2008-09-12 17:54:13 +0000 | [diff] [blame] | 366 | |
| 367 | /* Real path is meaningless for protocols */ |
| 368 | if (is_protocol) |
| 369 | snprintf(backing_filename, sizeof(backing_filename), |
| 370 | "%s", filename); |
| 371 | else |
| 372 | realpath(filename, backing_filename); |
| 373 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 374 | if (bdrv_create(&bdrv_qcow2, tmp_filename, |
bellard | a817d93 | 2006-08-24 19:53:37 +0000 | [diff] [blame] | 375 | total_size, backing_filename, 0) < 0) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 376 | return -1; |
| 377 | } |
| 378 | filename = tmp_filename; |
| 379 | bs->is_temporary = 1; |
| 380 | } |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 381 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 382 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 383 | if (flags & BDRV_O_FILE) { |
| 384 | drv = find_protocol(filename); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 385 | if (!drv) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 386 | return -ENOENT; |
| 387 | } else { |
| 388 | if (!drv) { |
| 389 | drv = find_image_format(filename); |
| 390 | if (!drv) |
| 391 | return -1; |
| 392 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 393 | } |
| 394 | bs->drv = drv; |
| 395 | bs->opaque = qemu_mallocz(drv->instance_size); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 396 | /* Note: for compatibility, we open disk image files as RDWR, and |
| 397 | RDONLY as fallback */ |
| 398 | if (!(flags & BDRV_O_FILE)) |
aliguori | 9f7965c | 2008-10-14 14:42:54 +0000 | [diff] [blame] | 399 | open_flags = BDRV_O_RDWR | (flags & BDRV_O_CACHE_MASK); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 400 | else |
| 401 | open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT); |
| 402 | ret = drv->bdrv_open(bs, filename, open_flags); |
aurel32 | a0a8353 | 2008-10-13 21:08:34 +0000 | [diff] [blame] | 403 | if ((ret == -EACCES || ret == -EPERM) && !(flags & BDRV_O_FILE)) { |
aliguori | 9f7965c | 2008-10-14 14:42:54 +0000 | [diff] [blame] | 404 | ret = drv->bdrv_open(bs, filename, open_flags & ~BDRV_O_RDWR); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 405 | bs->read_only = 1; |
| 406 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 407 | if (ret < 0) { |
| 408 | qemu_free(bs->opaque); |
bellard | 6b21b97 | 2006-08-23 21:14:37 +0000 | [diff] [blame] | 409 | bs->opaque = NULL; |
| 410 | bs->drv = NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 411 | return ret; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 412 | } |
bellard | d15a771 | 2006-08-06 13:35:09 +0000 | [diff] [blame] | 413 | if (drv->bdrv_getlength) { |
| 414 | bs->total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
| 415 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 416 | #ifndef _WIN32 |
| 417 | if (bs->is_temporary) { |
| 418 | unlink(filename); |
| 419 | } |
| 420 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 421 | if (bs->backing_file[0] != '\0') { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 422 | /* if there is a backing file, use it */ |
| 423 | bs->backing_hd = bdrv_new(""); |
| 424 | if (!bs->backing_hd) { |
| 425 | fail: |
| 426 | bdrv_close(bs); |
bellard | 6b21b97 | 2006-08-23 21:14:37 +0000 | [diff] [blame] | 427 | return -ENOMEM; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 428 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 429 | path_combine(backing_filename, sizeof(backing_filename), |
| 430 | filename, bs->backing_file); |
aliguori | 9f7965c | 2008-10-14 14:42:54 +0000 | [diff] [blame] | 431 | if (bdrv_open(bs->backing_hd, backing_filename, open_flags) < 0) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 432 | goto fail; |
| 433 | } |
| 434 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 435 | /* call the change callback */ |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 436 | bs->media_changed = 1; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 437 | if (bs->change_cb) |
| 438 | bs->change_cb(bs->change_opaque); |
| 439 | |
| 440 | return 0; |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 441 | } |
| 442 | |
| 443 | void bdrv_close(BlockDriverState *bs) |
| 444 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 445 | if (bs->drv) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 446 | if (bs->backing_hd) |
| 447 | bdrv_delete(bs->backing_hd); |
| 448 | bs->drv->bdrv_close(bs); |
| 449 | qemu_free(bs->opaque); |
| 450 | #ifdef _WIN32 |
| 451 | if (bs->is_temporary) { |
| 452 | unlink(bs->filename); |
| 453 | } |
bellard | 67b915a | 2004-03-31 23:37:16 +0000 | [diff] [blame] | 454 | #endif |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 455 | bs->opaque = NULL; |
| 456 | bs->drv = NULL; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 457 | |
| 458 | /* call the change callback */ |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 459 | bs->media_changed = 1; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 460 | if (bs->change_cb) |
| 461 | bs->change_cb(bs->change_opaque); |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | void bdrv_delete(BlockDriverState *bs) |
| 466 | { |
aurel32 | 34c6f05 | 2008-04-08 19:51:21 +0000 | [diff] [blame] | 467 | BlockDriverState **pbs; |
| 468 | |
| 469 | pbs = &bdrv_first; |
| 470 | while (*pbs != bs && *pbs != NULL) |
| 471 | pbs = &(*pbs)->next; |
| 472 | if (*pbs == bs) |
| 473 | *pbs = bs->next; |
| 474 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 475 | bdrv_close(bs); |
| 476 | qemu_free(bs); |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 477 | } |
| 478 | |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 479 | /* commit COW file into the raw image */ |
| 480 | int bdrv_commit(BlockDriverState *bs) |
| 481 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 482 | BlockDriver *drv = bs->drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 483 | int64_t i, total_sectors; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 484 | int n, j; |
| 485 | unsigned char sector[512]; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 486 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 487 | if (!drv) |
| 488 | return -ENOMEDIUM; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 489 | |
| 490 | if (bs->read_only) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 491 | return -EACCES; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 492 | } |
| 493 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 494 | if (!bs->backing_hd) { |
| 495 | return -ENOTSUP; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 496 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 497 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 498 | total_sectors = bdrv_getlength(bs) >> SECTOR_BITS; |
| 499 | for (i = 0; i < total_sectors;) { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 500 | if (drv->bdrv_is_allocated(bs, i, 65536, &n)) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 501 | for(j = 0; j < n; j++) { |
| 502 | if (bdrv_read(bs, i, sector, 1) != 0) { |
| 503 | return -EIO; |
| 504 | } |
| 505 | |
| 506 | if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) { |
| 507 | return -EIO; |
| 508 | } |
| 509 | i++; |
| 510 | } |
| 511 | } else { |
| 512 | i += n; |
| 513 | } |
| 514 | } |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 515 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 516 | if (drv->bdrv_make_empty) |
| 517 | return drv->bdrv_make_empty(bs); |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 518 | |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 519 | return 0; |
| 520 | } |
| 521 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 522 | /* return < 0 if error. See bdrv_write() for the return codes */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 523 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 524 | uint8_t *buf, int nb_sectors) |
| 525 | { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 526 | BlockDriver *drv = bs->drv; |
| 527 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 528 | if (!drv) |
| 529 | return -ENOMEDIUM; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 530 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 531 | if (drv->bdrv_pread) { |
| 532 | int ret, len; |
| 533 | len = nb_sectors * 512; |
| 534 | ret = drv->bdrv_pread(bs, sector_num * 512, buf, len); |
| 535 | if (ret < 0) |
| 536 | return ret; |
| 537 | else if (ret != len) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 538 | return -EINVAL; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 539 | else { |
| 540 | bs->rd_bytes += (unsigned) len; |
| 541 | bs->rd_ops ++; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 542 | return 0; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 543 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 544 | } else { |
| 545 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
| 546 | } |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 547 | } |
| 548 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 549 | /* Return < 0 if error. Important errors are: |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 550 | -EIO generic I/O error (may happen for all errors) |
| 551 | -ENOMEDIUM No media inserted. |
| 552 | -EINVAL Invalid sector number or nb_sectors |
| 553 | -EACCES Trying to write a read-only device |
| 554 | */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 555 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 556 | const uint8_t *buf, int nb_sectors) |
| 557 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 558 | BlockDriver *drv = bs->drv; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 559 | if (!bs->drv) |
| 560 | return -ENOMEDIUM; |
bellard | 0849bf0 | 2003-06-30 23:17:31 +0000 | [diff] [blame] | 561 | if (bs->read_only) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 562 | return -EACCES; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 563 | if (drv->bdrv_pwrite) { |
aliguori | 42fb280 | 2009-01-15 20:43:39 +0000 | [diff] [blame] | 564 | int ret, len, count = 0; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 565 | len = nb_sectors * 512; |
aliguori | 42fb280 | 2009-01-15 20:43:39 +0000 | [diff] [blame] | 566 | do { |
| 567 | ret = drv->bdrv_pwrite(bs, sector_num * 512, buf, len - count); |
| 568 | if (ret < 0) { |
| 569 | printf("bdrv_write ret=%d\n", ret); |
| 570 | return ret; |
| 571 | } |
| 572 | count += ret; |
| 573 | buf += ret; |
| 574 | } while (count != len); |
| 575 | bs->wr_bytes += (unsigned) len; |
| 576 | bs->wr_ops ++; |
| 577 | return 0; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 578 | } |
aliguori | 42fb280 | 2009-01-15 20:43:39 +0000 | [diff] [blame] | 579 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 580 | } |
| 581 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 582 | static int bdrv_pread_em(BlockDriverState *bs, int64_t offset, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 583 | uint8_t *buf, int count1) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 584 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 585 | uint8_t tmp_buf[SECTOR_SIZE]; |
| 586 | int len, nb_sectors, count; |
| 587 | int64_t sector_num; |
| 588 | |
| 589 | count = count1; |
| 590 | /* first read to align to sector start */ |
| 591 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); |
| 592 | if (len > count) |
| 593 | len = count; |
| 594 | sector_num = offset >> SECTOR_BITS; |
| 595 | if (len > 0) { |
| 596 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 597 | return -EIO; |
| 598 | memcpy(buf, tmp_buf + (offset & (SECTOR_SIZE - 1)), len); |
| 599 | count -= len; |
| 600 | if (count == 0) |
| 601 | return count1; |
| 602 | sector_num++; |
| 603 | buf += len; |
| 604 | } |
| 605 | |
| 606 | /* read the sectors "in place" */ |
| 607 | nb_sectors = count >> SECTOR_BITS; |
| 608 | if (nb_sectors > 0) { |
| 609 | if (bdrv_read(bs, sector_num, buf, nb_sectors) < 0) |
| 610 | return -EIO; |
| 611 | sector_num += nb_sectors; |
| 612 | len = nb_sectors << SECTOR_BITS; |
| 613 | buf += len; |
| 614 | count -= len; |
| 615 | } |
| 616 | |
| 617 | /* add data from the last sector */ |
| 618 | if (count > 0) { |
| 619 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 620 | return -EIO; |
| 621 | memcpy(buf, tmp_buf, count); |
| 622 | } |
| 623 | return count1; |
| 624 | } |
| 625 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 626 | static int bdrv_pwrite_em(BlockDriverState *bs, int64_t offset, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 627 | const uint8_t *buf, int count1) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 628 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 629 | uint8_t tmp_buf[SECTOR_SIZE]; |
| 630 | int len, nb_sectors, count; |
| 631 | int64_t sector_num; |
| 632 | |
| 633 | count = count1; |
| 634 | /* first write to align to sector start */ |
| 635 | len = (SECTOR_SIZE - offset) & (SECTOR_SIZE - 1); |
| 636 | if (len > count) |
| 637 | len = count; |
| 638 | sector_num = offset >> SECTOR_BITS; |
| 639 | if (len > 0) { |
| 640 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 641 | return -EIO; |
| 642 | memcpy(tmp_buf + (offset & (SECTOR_SIZE - 1)), buf, len); |
| 643 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
| 644 | return -EIO; |
| 645 | count -= len; |
| 646 | if (count == 0) |
| 647 | return count1; |
| 648 | sector_num++; |
| 649 | buf += len; |
| 650 | } |
| 651 | |
| 652 | /* write the sectors "in place" */ |
| 653 | nb_sectors = count >> SECTOR_BITS; |
| 654 | if (nb_sectors > 0) { |
| 655 | if (bdrv_write(bs, sector_num, buf, nb_sectors) < 0) |
| 656 | return -EIO; |
| 657 | sector_num += nb_sectors; |
| 658 | len = nb_sectors << SECTOR_BITS; |
| 659 | buf += len; |
| 660 | count -= len; |
| 661 | } |
| 662 | |
| 663 | /* add data from the last sector */ |
| 664 | if (count > 0) { |
| 665 | if (bdrv_read(bs, sector_num, tmp_buf, 1) < 0) |
| 666 | return -EIO; |
| 667 | memcpy(tmp_buf, buf, count); |
| 668 | if (bdrv_write(bs, sector_num, tmp_buf, 1) < 0) |
| 669 | return -EIO; |
| 670 | } |
| 671 | return count1; |
| 672 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 673 | |
| 674 | /** |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 675 | * Read with byte offsets (needed only for file protocols) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 676 | */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 677 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 678 | void *buf1, int count1) |
| 679 | { |
| 680 | BlockDriver *drv = bs->drv; |
| 681 | |
| 682 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 683 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 684 | if (!drv->bdrv_pread) |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 685 | return bdrv_pread_em(bs, offset, buf1, count1); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 686 | return drv->bdrv_pread(bs, offset, buf1, count1); |
| 687 | } |
| 688 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 689 | /** |
| 690 | * Write with byte offsets (needed only for file protocols) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 691 | */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 692 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 693 | const void *buf1, int count1) |
| 694 | { |
| 695 | BlockDriver *drv = bs->drv; |
| 696 | |
| 697 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 698 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 699 | if (!drv->bdrv_pwrite) |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 700 | return bdrv_pwrite_em(bs, offset, buf1, count1); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 701 | return drv->bdrv_pwrite(bs, offset, buf1, count1); |
| 702 | } |
| 703 | |
| 704 | /** |
| 705 | * Truncate file to 'offset' bytes (needed only for file protocols) |
| 706 | */ |
| 707 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) |
| 708 | { |
| 709 | BlockDriver *drv = bs->drv; |
| 710 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 711 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 712 | if (!drv->bdrv_truncate) |
| 713 | return -ENOTSUP; |
| 714 | return drv->bdrv_truncate(bs, offset); |
| 715 | } |
| 716 | |
| 717 | /** |
| 718 | * Length of a file in bytes. Return < 0 if error or unknown. |
| 719 | */ |
| 720 | int64_t bdrv_getlength(BlockDriverState *bs) |
| 721 | { |
| 722 | BlockDriver *drv = bs->drv; |
| 723 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 724 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 725 | if (!drv->bdrv_getlength) { |
| 726 | /* legacy mode */ |
| 727 | return bs->total_sectors * SECTOR_SIZE; |
| 728 | } |
| 729 | return drv->bdrv_getlength(bs); |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 730 | } |
| 731 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 732 | /* return 0 as number of sectors if no device present or error */ |
ths | 96b8f13 | 2007-12-17 01:35:20 +0000 | [diff] [blame] | 733 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 734 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 735 | int64_t length; |
| 736 | length = bdrv_getlength(bs); |
| 737 | if (length < 0) |
| 738 | length = 0; |
| 739 | else |
| 740 | length = length >> SECTOR_BITS; |
| 741 | *nb_sectors_ptr = length; |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 742 | } |
bellard | cf98951 | 2004-02-16 21:56:36 +0000 | [diff] [blame] | 743 | |
aliguori | f3d54fc | 2008-11-25 21:50:24 +0000 | [diff] [blame] | 744 | struct partition { |
| 745 | uint8_t boot_ind; /* 0x80 - active */ |
| 746 | uint8_t head; /* starting head */ |
| 747 | uint8_t sector; /* starting sector */ |
| 748 | uint8_t cyl; /* starting cylinder */ |
| 749 | uint8_t sys_ind; /* What partition type */ |
| 750 | uint8_t end_head; /* end head */ |
| 751 | uint8_t end_sector; /* end sector */ |
| 752 | uint8_t end_cyl; /* end cylinder */ |
| 753 | uint32_t start_sect; /* starting sector counting from 0 */ |
| 754 | uint32_t nr_sects; /* nr of sectors in partition */ |
| 755 | } __attribute__((packed)); |
| 756 | |
| 757 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ |
| 758 | static int guess_disk_lchs(BlockDriverState *bs, |
| 759 | int *pcylinders, int *pheads, int *psectors) |
| 760 | { |
| 761 | uint8_t buf[512]; |
| 762 | int ret, i, heads, sectors, cylinders; |
| 763 | struct partition *p; |
| 764 | uint32_t nr_sects; |
blueswir1 | a38131b | 2008-12-05 17:56:40 +0000 | [diff] [blame] | 765 | uint64_t nb_sectors; |
aliguori | f3d54fc | 2008-11-25 21:50:24 +0000 | [diff] [blame] | 766 | |
| 767 | bdrv_get_geometry(bs, &nb_sectors); |
| 768 | |
| 769 | ret = bdrv_read(bs, 0, buf, 1); |
| 770 | if (ret < 0) |
| 771 | return -1; |
| 772 | /* test msdos magic */ |
| 773 | if (buf[510] != 0x55 || buf[511] != 0xaa) |
| 774 | return -1; |
| 775 | for(i = 0; i < 4; i++) { |
| 776 | p = ((struct partition *)(buf + 0x1be)) + i; |
| 777 | nr_sects = le32_to_cpu(p->nr_sects); |
| 778 | if (nr_sects && p->end_head) { |
| 779 | /* We make the assumption that the partition terminates on |
| 780 | a cylinder boundary */ |
| 781 | heads = p->end_head + 1; |
| 782 | sectors = p->end_sector & 63; |
| 783 | if (sectors == 0) |
| 784 | continue; |
| 785 | cylinders = nb_sectors / (heads * sectors); |
| 786 | if (cylinders < 1 || cylinders > 16383) |
| 787 | continue; |
| 788 | *pheads = heads; |
| 789 | *psectors = sectors; |
| 790 | *pcylinders = cylinders; |
| 791 | #if 0 |
| 792 | printf("guessed geometry: LCHS=%d %d %d\n", |
| 793 | cylinders, heads, sectors); |
| 794 | #endif |
| 795 | return 0; |
| 796 | } |
| 797 | } |
| 798 | return -1; |
| 799 | } |
| 800 | |
| 801 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) |
| 802 | { |
| 803 | int translation, lba_detected = 0; |
| 804 | int cylinders, heads, secs; |
blueswir1 | a38131b | 2008-12-05 17:56:40 +0000 | [diff] [blame] | 805 | uint64_t nb_sectors; |
aliguori | f3d54fc | 2008-11-25 21:50:24 +0000 | [diff] [blame] | 806 | |
| 807 | /* if a geometry hint is available, use it */ |
| 808 | bdrv_get_geometry(bs, &nb_sectors); |
| 809 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); |
| 810 | translation = bdrv_get_translation_hint(bs); |
| 811 | if (cylinders != 0) { |
| 812 | *pcyls = cylinders; |
| 813 | *pheads = heads; |
| 814 | *psecs = secs; |
| 815 | } else { |
| 816 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { |
| 817 | if (heads > 16) { |
| 818 | /* if heads > 16, it means that a BIOS LBA |
| 819 | translation was active, so the default |
| 820 | hardware geometry is OK */ |
| 821 | lba_detected = 1; |
| 822 | goto default_geometry; |
| 823 | } else { |
| 824 | *pcyls = cylinders; |
| 825 | *pheads = heads; |
| 826 | *psecs = secs; |
| 827 | /* disable any translation to be in sync with |
| 828 | the logical geometry */ |
| 829 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { |
| 830 | bdrv_set_translation_hint(bs, |
| 831 | BIOS_ATA_TRANSLATION_NONE); |
| 832 | } |
| 833 | } |
| 834 | } else { |
| 835 | default_geometry: |
| 836 | /* if no geometry, use a standard physical disk geometry */ |
| 837 | cylinders = nb_sectors / (16 * 63); |
| 838 | |
| 839 | if (cylinders > 16383) |
| 840 | cylinders = 16383; |
| 841 | else if (cylinders < 2) |
| 842 | cylinders = 2; |
| 843 | *pcyls = cylinders; |
| 844 | *pheads = 16; |
| 845 | *psecs = 63; |
| 846 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { |
| 847 | if ((*pcyls * *pheads) <= 131072) { |
| 848 | bdrv_set_translation_hint(bs, |
| 849 | BIOS_ATA_TRANSLATION_LARGE); |
| 850 | } else { |
| 851 | bdrv_set_translation_hint(bs, |
| 852 | BIOS_ATA_TRANSLATION_LBA); |
| 853 | } |
| 854 | } |
| 855 | } |
| 856 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); |
| 857 | } |
| 858 | } |
| 859 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 860 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 861 | int cyls, int heads, int secs) |
| 862 | { |
| 863 | bs->cyls = cyls; |
| 864 | bs->heads = heads; |
| 865 | bs->secs = secs; |
| 866 | } |
| 867 | |
| 868 | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
| 869 | { |
| 870 | bs->type = type; |
| 871 | bs->removable = ((type == BDRV_TYPE_CDROM || |
| 872 | type == BDRV_TYPE_FLOPPY)); |
| 873 | } |
| 874 | |
bellard | 46d4767 | 2004-11-16 01:45:27 +0000 | [diff] [blame] | 875 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
| 876 | { |
| 877 | bs->translation = translation; |
| 878 | } |
| 879 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 880 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 881 | int *pcyls, int *pheads, int *psecs) |
| 882 | { |
| 883 | *pcyls = bs->cyls; |
| 884 | *pheads = bs->heads; |
| 885 | *psecs = bs->secs; |
| 886 | } |
| 887 | |
| 888 | int bdrv_get_type_hint(BlockDriverState *bs) |
| 889 | { |
| 890 | return bs->type; |
| 891 | } |
| 892 | |
bellard | 46d4767 | 2004-11-16 01:45:27 +0000 | [diff] [blame] | 893 | int bdrv_get_translation_hint(BlockDriverState *bs) |
| 894 | { |
| 895 | return bs->translation; |
| 896 | } |
| 897 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 898 | int bdrv_is_removable(BlockDriverState *bs) |
| 899 | { |
| 900 | return bs->removable; |
| 901 | } |
| 902 | |
| 903 | int bdrv_is_read_only(BlockDriverState *bs) |
| 904 | { |
| 905 | return bs->read_only; |
| 906 | } |
| 907 | |
ths | 985a03b | 2007-12-24 16:10:43 +0000 | [diff] [blame] | 908 | int bdrv_is_sg(BlockDriverState *bs) |
| 909 | { |
| 910 | return bs->sg; |
| 911 | } |
| 912 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 913 | /* XXX: no longer used */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 914 | void bdrv_set_change_cb(BlockDriverState *bs, |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 915 | void (*change_cb)(void *opaque), void *opaque) |
| 916 | { |
| 917 | bs->change_cb = change_cb; |
| 918 | bs->change_opaque = opaque; |
| 919 | } |
| 920 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 921 | int bdrv_is_encrypted(BlockDriverState *bs) |
| 922 | { |
| 923 | if (bs->backing_hd && bs->backing_hd->encrypted) |
| 924 | return 1; |
| 925 | return bs->encrypted; |
| 926 | } |
| 927 | |
| 928 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
| 929 | { |
| 930 | int ret; |
| 931 | if (bs->backing_hd && bs->backing_hd->encrypted) { |
| 932 | ret = bdrv_set_key(bs->backing_hd, key); |
| 933 | if (ret < 0) |
| 934 | return ret; |
| 935 | if (!bs->encrypted) |
| 936 | return 0; |
| 937 | } |
| 938 | if (!bs->encrypted || !bs->drv || !bs->drv->bdrv_set_key) |
| 939 | return -1; |
| 940 | return bs->drv->bdrv_set_key(bs, key); |
| 941 | } |
| 942 | |
| 943 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
| 944 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 945 | if (!bs->drv) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 946 | buf[0] = '\0'; |
| 947 | } else { |
| 948 | pstrcpy(buf, buf_size, bs->drv->format_name); |
| 949 | } |
| 950 | } |
| 951 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 952 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 953 | void *opaque) |
| 954 | { |
| 955 | BlockDriver *drv; |
| 956 | |
| 957 | for (drv = first_drv; drv != NULL; drv = drv->next) { |
| 958 | it(opaque, drv->format_name); |
| 959 | } |
| 960 | } |
| 961 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 962 | BlockDriverState *bdrv_find(const char *name) |
| 963 | { |
| 964 | BlockDriverState *bs; |
| 965 | |
| 966 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
| 967 | if (!strcmp(name, bs->device_name)) |
| 968 | return bs; |
| 969 | } |
| 970 | return NULL; |
| 971 | } |
| 972 | |
bellard | 81d0912 | 2004-07-14 17:21:37 +0000 | [diff] [blame] | 973 | void bdrv_iterate(void (*it)(void *opaque, const char *name), void *opaque) |
| 974 | { |
| 975 | BlockDriverState *bs; |
| 976 | |
| 977 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
| 978 | it(opaque, bs->device_name); |
| 979 | } |
| 980 | } |
| 981 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 982 | const char *bdrv_get_device_name(BlockDriverState *bs) |
| 983 | { |
| 984 | return bs->device_name; |
| 985 | } |
| 986 | |
pbrook | 7a6cba6 | 2006-06-04 11:39:07 +0000 | [diff] [blame] | 987 | void bdrv_flush(BlockDriverState *bs) |
| 988 | { |
| 989 | if (bs->drv->bdrv_flush) |
| 990 | bs->drv->bdrv_flush(bs); |
| 991 | if (bs->backing_hd) |
| 992 | bdrv_flush(bs->backing_hd); |
| 993 | } |
| 994 | |
aliguori | c6ca28d | 2008-10-06 13:55:43 +0000 | [diff] [blame] | 995 | void bdrv_flush_all(void) |
| 996 | { |
| 997 | BlockDriverState *bs; |
| 998 | |
| 999 | for (bs = bdrv_first; bs != NULL; bs = bs->next) |
| 1000 | if (bs->drv && !bdrv_is_read_only(bs) && |
| 1001 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) |
| 1002 | bdrv_flush(bs); |
| 1003 | } |
| 1004 | |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 1005 | /* |
| 1006 | * Returns true iff the specified sector is present in the disk image. Drivers |
| 1007 | * not implementing the functionality are assumed to not support backing files, |
| 1008 | * hence all their sectors are reported as allocated. |
| 1009 | * |
| 1010 | * 'pnum' is set to the number of sectors (including and immediately following |
| 1011 | * the specified sector) that are known to be in the same |
| 1012 | * allocated/unallocated state. |
| 1013 | * |
| 1014 | * 'nb_sectors' is the max value 'pnum' should be set to. |
| 1015 | */ |
| 1016 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
| 1017 | int *pnum) |
| 1018 | { |
| 1019 | int64_t n; |
| 1020 | if (!bs->drv->bdrv_is_allocated) { |
| 1021 | if (sector_num >= bs->total_sectors) { |
| 1022 | *pnum = 0; |
| 1023 | return 0; |
| 1024 | } |
| 1025 | n = bs->total_sectors - sector_num; |
| 1026 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); |
| 1027 | return 1; |
| 1028 | } |
| 1029 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); |
| 1030 | } |
| 1031 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1032 | void bdrv_info(void) |
| 1033 | { |
| 1034 | BlockDriverState *bs; |
| 1035 | |
| 1036 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
| 1037 | term_printf("%s:", bs->device_name); |
| 1038 | term_printf(" type="); |
| 1039 | switch(bs->type) { |
| 1040 | case BDRV_TYPE_HD: |
| 1041 | term_printf("hd"); |
| 1042 | break; |
| 1043 | case BDRV_TYPE_CDROM: |
| 1044 | term_printf("cdrom"); |
| 1045 | break; |
| 1046 | case BDRV_TYPE_FLOPPY: |
| 1047 | term_printf("floppy"); |
| 1048 | break; |
| 1049 | } |
| 1050 | term_printf(" removable=%d", bs->removable); |
| 1051 | if (bs->removable) { |
| 1052 | term_printf(" locked=%d", bs->locked); |
| 1053 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1054 | if (bs->drv) { |
ths | fef3074 | 2006-12-22 14:11:32 +0000 | [diff] [blame] | 1055 | term_printf(" file="); |
| 1056 | term_print_filename(bs->filename); |
| 1057 | if (bs->backing_file[0] != '\0') { |
| 1058 | term_printf(" backing_file="); |
| 1059 | term_print_filename(bs->backing_file); |
| 1060 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1061 | term_printf(" ro=%d", bs->read_only); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1062 | term_printf(" drv=%s", bs->drv->format_name); |
| 1063 | if (bs->encrypted) |
| 1064 | term_printf(" encrypted"); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1065 | } else { |
| 1066 | term_printf(" [not inserted]"); |
| 1067 | } |
| 1068 | term_printf("\n"); |
| 1069 | } |
| 1070 | } |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1071 | |
| 1072 | /* The "info blockstats" command. */ |
| 1073 | void bdrv_info_stats (void) |
| 1074 | { |
| 1075 | BlockDriverState *bs; |
aliguori | a7cbfae | 2009-01-22 18:57:30 +0000 | [diff] [blame] | 1076 | BlockDriverInfo bdi; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1077 | |
| 1078 | for (bs = bdrv_first; bs != NULL; bs = bs->next) { |
| 1079 | term_printf ("%s:" |
| 1080 | " rd_bytes=%" PRIu64 |
| 1081 | " wr_bytes=%" PRIu64 |
| 1082 | " rd_operations=%" PRIu64 |
| 1083 | " wr_operations=%" PRIu64 |
aliguori | a7cbfae | 2009-01-22 18:57:30 +0000 | [diff] [blame] | 1084 | , |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1085 | bs->device_name, |
| 1086 | bs->rd_bytes, bs->wr_bytes, |
| 1087 | bs->rd_ops, bs->wr_ops); |
aliguori | a7cbfae | 2009-01-22 18:57:30 +0000 | [diff] [blame] | 1088 | if (bdrv_get_info(bs, &bdi) == 0) |
aliguori | 1987530 | 2009-01-22 18:57:34 +0000 | [diff] [blame] | 1089 | term_printf(" high=%" PRId64 |
| 1090 | " bytes_free=%" PRId64, |
| 1091 | bdi.highest_alloc, bdi.num_free_bytes); |
aliguori | a7cbfae | 2009-01-22 18:57:30 +0000 | [diff] [blame] | 1092 | term_printf("\n"); |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1093 | } |
| 1094 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1095 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1096 | void bdrv_get_backing_filename(BlockDriverState *bs, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1097 | char *filename, int filename_size) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1098 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1099 | if (!bs->backing_hd) { |
| 1100 | pstrcpy(filename, filename_size, ""); |
| 1101 | } else { |
| 1102 | pstrcpy(filename, filename_size, bs->backing_file); |
| 1103 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1104 | } |
| 1105 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1106 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1107 | const uint8_t *buf, int nb_sectors) |
| 1108 | { |
| 1109 | BlockDriver *drv = bs->drv; |
| 1110 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1111 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1112 | if (!drv->bdrv_write_compressed) |
| 1113 | return -ENOTSUP; |
| 1114 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
| 1115 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 1116 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1117 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
| 1118 | { |
| 1119 | BlockDriver *drv = bs->drv; |
| 1120 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1121 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1122 | if (!drv->bdrv_get_info) |
| 1123 | return -ENOTSUP; |
| 1124 | memset(bdi, 0, sizeof(*bdi)); |
| 1125 | return drv->bdrv_get_info(bs, bdi); |
| 1126 | } |
| 1127 | |
| 1128 | /**************************************************************/ |
| 1129 | /* handling of snapshots */ |
| 1130 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1131 | int bdrv_snapshot_create(BlockDriverState *bs, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1132 | QEMUSnapshotInfo *sn_info) |
| 1133 | { |
| 1134 | BlockDriver *drv = bs->drv; |
| 1135 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1136 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1137 | if (!drv->bdrv_snapshot_create) |
| 1138 | return -ENOTSUP; |
| 1139 | return drv->bdrv_snapshot_create(bs, sn_info); |
| 1140 | } |
| 1141 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1142 | int bdrv_snapshot_goto(BlockDriverState *bs, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1143 | const char *snapshot_id) |
| 1144 | { |
| 1145 | BlockDriver *drv = bs->drv; |
| 1146 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1147 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1148 | if (!drv->bdrv_snapshot_goto) |
| 1149 | return -ENOTSUP; |
| 1150 | return drv->bdrv_snapshot_goto(bs, snapshot_id); |
| 1151 | } |
| 1152 | |
| 1153 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
| 1154 | { |
| 1155 | BlockDriver *drv = bs->drv; |
| 1156 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1157 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1158 | if (!drv->bdrv_snapshot_delete) |
| 1159 | return -ENOTSUP; |
| 1160 | return drv->bdrv_snapshot_delete(bs, snapshot_id); |
| 1161 | } |
| 1162 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1163 | int bdrv_snapshot_list(BlockDriverState *bs, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1164 | QEMUSnapshotInfo **psn_info) |
| 1165 | { |
| 1166 | BlockDriver *drv = bs->drv; |
| 1167 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1168 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1169 | if (!drv->bdrv_snapshot_list) |
| 1170 | return -ENOTSUP; |
| 1171 | return drv->bdrv_snapshot_list(bs, psn_info); |
| 1172 | } |
| 1173 | |
| 1174 | #define NB_SUFFIXES 4 |
| 1175 | |
| 1176 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
| 1177 | { |
| 1178 | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
| 1179 | int64_t base; |
| 1180 | int i; |
| 1181 | |
| 1182 | if (size <= 999) { |
| 1183 | snprintf(buf, buf_size, "%" PRId64, size); |
| 1184 | } else { |
| 1185 | base = 1024; |
| 1186 | for(i = 0; i < NB_SUFFIXES; i++) { |
| 1187 | if (size < (10 * base)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1188 | snprintf(buf, buf_size, "%0.1f%c", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1189 | (double)size / base, |
| 1190 | suffixes[i]); |
| 1191 | break; |
| 1192 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1193 | snprintf(buf, buf_size, "%" PRId64 "%c", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1194 | ((size + (base >> 1)) / base), |
| 1195 | suffixes[i]); |
| 1196 | break; |
| 1197 | } |
| 1198 | base = base * 1024; |
| 1199 | } |
| 1200 | } |
| 1201 | return buf; |
| 1202 | } |
| 1203 | |
| 1204 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
| 1205 | { |
| 1206 | char buf1[128], date_buf[128], clock_buf[128]; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 1207 | #ifdef _WIN32 |
| 1208 | struct tm *ptm; |
| 1209 | #else |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1210 | struct tm tm; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 1211 | #endif |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1212 | time_t ti; |
| 1213 | int64_t secs; |
| 1214 | |
| 1215 | if (!sn) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1216 | snprintf(buf, buf_size, |
| 1217 | "%-10s%-20s%7s%20s%15s", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1218 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
| 1219 | } else { |
| 1220 | ti = sn->date_sec; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 1221 | #ifdef _WIN32 |
| 1222 | ptm = localtime(&ti); |
| 1223 | strftime(date_buf, sizeof(date_buf), |
| 1224 | "%Y-%m-%d %H:%M:%S", ptm); |
| 1225 | #else |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1226 | localtime_r(&ti, &tm); |
| 1227 | strftime(date_buf, sizeof(date_buf), |
| 1228 | "%Y-%m-%d %H:%M:%S", &tm); |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 1229 | #endif |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1230 | secs = sn->vm_clock_nsec / 1000000000; |
| 1231 | snprintf(clock_buf, sizeof(clock_buf), |
| 1232 | "%02d:%02d:%02d.%03d", |
| 1233 | (int)(secs / 3600), |
| 1234 | (int)((secs / 60) % 60), |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1235 | (int)(secs % 60), |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1236 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
| 1237 | snprintf(buf, buf_size, |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1238 | "%-10s%-20s%7s%20s%15s", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1239 | sn->id_str, sn->name, |
| 1240 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), |
| 1241 | date_buf, |
| 1242 | clock_buf); |
| 1243 | } |
| 1244 | return buf; |
| 1245 | } |
| 1246 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1247 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1248 | /**************************************************************/ |
| 1249 | /* async I/Os */ |
| 1250 | |
aliguori | 3b69e4b | 2009-01-22 16:59:24 +0000 | [diff] [blame] | 1251 | typedef struct VectorTranslationState { |
| 1252 | QEMUIOVector *iov; |
| 1253 | uint8_t *bounce; |
| 1254 | int is_write; |
| 1255 | BlockDriverAIOCB *aiocb; |
| 1256 | BlockDriverAIOCB *this_aiocb; |
| 1257 | } VectorTranslationState; |
| 1258 | |
| 1259 | static void bdrv_aio_rw_vector_cb(void *opaque, int ret) |
| 1260 | { |
| 1261 | VectorTranslationState *s = opaque; |
| 1262 | |
| 1263 | if (!s->is_write) { |
aliguori | 249aa74 | 2009-01-26 17:17:52 +0000 | [diff] [blame] | 1264 | qemu_iovec_from_buffer(s->iov, s->bounce, s->iov->size); |
aliguori | 3b69e4b | 2009-01-22 16:59:24 +0000 | [diff] [blame] | 1265 | } |
| 1266 | qemu_free(s->bounce); |
| 1267 | s->this_aiocb->cb(s->this_aiocb->opaque, ret); |
| 1268 | qemu_aio_release(s->this_aiocb); |
| 1269 | } |
| 1270 | |
| 1271 | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, |
| 1272 | int64_t sector_num, |
| 1273 | QEMUIOVector *iov, |
| 1274 | int nb_sectors, |
| 1275 | BlockDriverCompletionFunc *cb, |
| 1276 | void *opaque, |
| 1277 | int is_write) |
| 1278 | |
| 1279 | { |
| 1280 | VectorTranslationState *s = qemu_mallocz(sizeof(*s)); |
| 1281 | BlockDriverAIOCB *aiocb = qemu_aio_get(bs, cb, opaque); |
| 1282 | |
| 1283 | s->this_aiocb = aiocb; |
| 1284 | s->iov = iov; |
| 1285 | s->bounce = qemu_memalign(512, nb_sectors * 512); |
| 1286 | s->is_write = is_write; |
| 1287 | if (is_write) { |
| 1288 | qemu_iovec_to_buffer(s->iov, s->bounce); |
| 1289 | s->aiocb = bdrv_aio_write(bs, sector_num, s->bounce, nb_sectors, |
| 1290 | bdrv_aio_rw_vector_cb, s); |
| 1291 | } else { |
| 1292 | s->aiocb = bdrv_aio_read(bs, sector_num, s->bounce, nb_sectors, |
| 1293 | bdrv_aio_rw_vector_cb, s); |
| 1294 | } |
| 1295 | return aiocb; |
| 1296 | } |
| 1297 | |
| 1298 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
| 1299 | QEMUIOVector *iov, int nb_sectors, |
| 1300 | BlockDriverCompletionFunc *cb, void *opaque) |
| 1301 | { |
| 1302 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
| 1303 | cb, opaque, 0); |
| 1304 | } |
| 1305 | |
| 1306 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
| 1307 | QEMUIOVector *iov, int nb_sectors, |
| 1308 | BlockDriverCompletionFunc *cb, void *opaque) |
| 1309 | { |
| 1310 | return bdrv_aio_rw_vector(bs, sector_num, iov, nb_sectors, |
| 1311 | cb, opaque, 1); |
| 1312 | } |
| 1313 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1314 | BlockDriverAIOCB *bdrv_aio_read(BlockDriverState *bs, int64_t sector_num, |
| 1315 | uint8_t *buf, int nb_sectors, |
| 1316 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1317 | { |
| 1318 | BlockDriver *drv = bs->drv; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1319 | BlockDriverAIOCB *ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1320 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1321 | if (!drv) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1322 | return NULL; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 1323 | |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1324 | ret = drv->bdrv_aio_read(bs, sector_num, buf, nb_sectors, cb, opaque); |
| 1325 | |
| 1326 | if (ret) { |
| 1327 | /* Update stats even though technically transfer has not happened. */ |
| 1328 | bs->rd_bytes += (unsigned) nb_sectors * SECTOR_SIZE; |
| 1329 | bs->rd_ops ++; |
| 1330 | } |
| 1331 | |
| 1332 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1333 | } |
| 1334 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1335 | BlockDriverAIOCB *bdrv_aio_write(BlockDriverState *bs, int64_t sector_num, |
| 1336 | const uint8_t *buf, int nb_sectors, |
| 1337 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1338 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1339 | BlockDriver *drv = bs->drv; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1340 | BlockDriverAIOCB *ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1341 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1342 | if (!drv) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1343 | return NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1344 | if (bs->read_only) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1345 | return NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1346 | |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1347 | ret = drv->bdrv_aio_write(bs, sector_num, buf, nb_sectors, cb, opaque); |
| 1348 | |
| 1349 | if (ret) { |
| 1350 | /* Update stats even though technically transfer has not happened. */ |
| 1351 | bs->wr_bytes += (unsigned) nb_sectors * SECTOR_SIZE; |
| 1352 | bs->wr_ops ++; |
| 1353 | } |
| 1354 | |
| 1355 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1356 | } |
| 1357 | |
| 1358 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1359 | { |
| 1360 | BlockDriver *drv = acb->bs->drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1361 | |
aliguori | 3b69e4b | 2009-01-22 16:59:24 +0000 | [diff] [blame] | 1362 | if (acb->cb == bdrv_aio_rw_vector_cb) { |
| 1363 | VectorTranslationState *s = acb->opaque; |
| 1364 | acb = s->aiocb; |
| 1365 | } |
| 1366 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1367 | drv->bdrv_aio_cancel(acb); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1368 | } |
| 1369 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1370 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1371 | /**************************************************************/ |
| 1372 | /* async block device emulation */ |
| 1373 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1374 | static void bdrv_aio_bh_cb(void *opaque) |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 1375 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1376 | BlockDriverAIOCBSync *acb = opaque; |
| 1377 | acb->common.cb(acb->common.opaque, acb->ret); |
| 1378 | qemu_aio_release(acb); |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 1379 | } |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 1380 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1381 | static BlockDriverAIOCB *bdrv_aio_read_em(BlockDriverState *bs, |
| 1382 | int64_t sector_num, uint8_t *buf, int nb_sectors, |
| 1383 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1384 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1385 | BlockDriverAIOCBSync *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1386 | int ret; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1387 | |
| 1388 | acb = qemu_aio_get(bs, cb, opaque); |
| 1389 | if (!acb->bh) |
| 1390 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
| 1391 | ret = bdrv_read(bs, sector_num, buf, nb_sectors); |
| 1392 | acb->ret = ret; |
| 1393 | qemu_bh_schedule(acb->bh); |
| 1394 | return &acb->common; |
pbrook | 7a6cba6 | 2006-06-04 11:39:07 +0000 | [diff] [blame] | 1395 | } |
| 1396 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1397 | static BlockDriverAIOCB *bdrv_aio_write_em(BlockDriverState *bs, |
| 1398 | int64_t sector_num, const uint8_t *buf, int nb_sectors, |
| 1399 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1400 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1401 | BlockDriverAIOCBSync *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1402 | int ret; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1403 | |
| 1404 | acb = qemu_aio_get(bs, cb, opaque); |
| 1405 | if (!acb->bh) |
| 1406 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
| 1407 | ret = bdrv_write(bs, sector_num, buf, nb_sectors); |
| 1408 | acb->ret = ret; |
| 1409 | qemu_bh_schedule(acb->bh); |
| 1410 | return &acb->common; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1411 | } |
| 1412 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1413 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1414 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1415 | BlockDriverAIOCBSync *acb = (BlockDriverAIOCBSync *)blockacb; |
| 1416 | qemu_bh_cancel(acb->bh); |
| 1417 | qemu_aio_release(acb); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1418 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1419 | |
| 1420 | /**************************************************************/ |
| 1421 | /* sync block device emulation */ |
| 1422 | |
| 1423 | static void bdrv_rw_em_cb(void *opaque, int ret) |
| 1424 | { |
| 1425 | *(int *)opaque = ret; |
| 1426 | } |
| 1427 | |
| 1428 | #define NOT_DONE 0x7fffffff |
| 1429 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1430 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1431 | uint8_t *buf, int nb_sectors) |
| 1432 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1433 | int async_ret; |
| 1434 | BlockDriverAIOCB *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1435 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1436 | async_ret = NOT_DONE; |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1437 | acb = bdrv_aio_read(bs, sector_num, buf, nb_sectors, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1438 | bdrv_rw_em_cb, &async_ret); |
aliguori | baf35cb | 2008-09-10 15:45:19 +0000 | [diff] [blame] | 1439 | if (acb == NULL) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1440 | return -1; |
aliguori | baf35cb | 2008-09-10 15:45:19 +0000 | [diff] [blame] | 1441 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1442 | while (async_ret == NOT_DONE) { |
| 1443 | qemu_aio_wait(); |
| 1444 | } |
aliguori | baf35cb | 2008-09-10 15:45:19 +0000 | [diff] [blame] | 1445 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1446 | return async_ret; |
| 1447 | } |
| 1448 | |
| 1449 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
| 1450 | const uint8_t *buf, int nb_sectors) |
| 1451 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1452 | int async_ret; |
| 1453 | BlockDriverAIOCB *acb; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1454 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1455 | async_ret = NOT_DONE; |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1456 | acb = bdrv_aio_write(bs, sector_num, buf, nb_sectors, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1457 | bdrv_rw_em_cb, &async_ret); |
aliguori | baf35cb | 2008-09-10 15:45:19 +0000 | [diff] [blame] | 1458 | if (acb == NULL) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1459 | return -1; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1460 | while (async_ret == NOT_DONE) { |
| 1461 | qemu_aio_wait(); |
| 1462 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1463 | return async_ret; |
| 1464 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1465 | |
| 1466 | void bdrv_init(void) |
| 1467 | { |
| 1468 | bdrv_register(&bdrv_raw); |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1469 | bdrv_register(&bdrv_host_device); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1470 | #ifndef _WIN32 |
| 1471 | bdrv_register(&bdrv_cow); |
| 1472 | #endif |
| 1473 | bdrv_register(&bdrv_qcow); |
| 1474 | bdrv_register(&bdrv_vmdk); |
bellard | 3c56521 | 2004-09-29 21:29:14 +0000 | [diff] [blame] | 1475 | bdrv_register(&bdrv_cloop); |
bellard | 585d0ed | 2004-12-12 11:24:44 +0000 | [diff] [blame] | 1476 | bdrv_register(&bdrv_dmg); |
bellard | a8753c3 | 2005-04-26 21:34:00 +0000 | [diff] [blame] | 1477 | bdrv_register(&bdrv_bochs); |
bellard | 6a0f9e8 | 2005-04-27 20:17:58 +0000 | [diff] [blame] | 1478 | bdrv_register(&bdrv_vpc); |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 1479 | bdrv_register(&bdrv_vvfat); |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1480 | bdrv_register(&bdrv_qcow2); |
ths | 6ada745 | 2007-07-31 23:28:53 +0000 | [diff] [blame] | 1481 | bdrv_register(&bdrv_parallels); |
ths | 7581825 | 2008-07-03 13:41:03 +0000 | [diff] [blame] | 1482 | bdrv_register(&bdrv_nbd); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1483 | } |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1484 | |
| 1485 | void *qemu_aio_get(BlockDriverState *bs, BlockDriverCompletionFunc *cb, |
| 1486 | void *opaque) |
| 1487 | { |
| 1488 | BlockDriver *drv; |
| 1489 | BlockDriverAIOCB *acb; |
| 1490 | |
| 1491 | drv = bs->drv; |
| 1492 | if (drv->free_aiocb) { |
| 1493 | acb = drv->free_aiocb; |
| 1494 | drv->free_aiocb = acb->next; |
| 1495 | } else { |
| 1496 | acb = qemu_mallocz(drv->aiocb_size); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 1497 | } |
| 1498 | acb->bs = bs; |
| 1499 | acb->cb = cb; |
| 1500 | acb->opaque = opaque; |
| 1501 | return acb; |
| 1502 | } |
| 1503 | |
| 1504 | void qemu_aio_release(void *p) |
| 1505 | { |
| 1506 | BlockDriverAIOCB *acb = p; |
| 1507 | BlockDriver *drv = acb->bs->drv; |
| 1508 | acb->next = drv->free_aiocb; |
| 1509 | drv->free_aiocb = acb; |
| 1510 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1511 | |
| 1512 | /**************************************************************/ |
| 1513 | /* removable device support */ |
| 1514 | |
| 1515 | /** |
| 1516 | * Return TRUE if the media is present |
| 1517 | */ |
| 1518 | int bdrv_is_inserted(BlockDriverState *bs) |
| 1519 | { |
| 1520 | BlockDriver *drv = bs->drv; |
| 1521 | int ret; |
| 1522 | if (!drv) |
| 1523 | return 0; |
| 1524 | if (!drv->bdrv_is_inserted) |
| 1525 | return 1; |
| 1526 | ret = drv->bdrv_is_inserted(bs); |
| 1527 | return ret; |
| 1528 | } |
| 1529 | |
| 1530 | /** |
| 1531 | * Return TRUE if the media changed since the last call to this |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1532 | * function. It is currently only used for floppy disks |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1533 | */ |
| 1534 | int bdrv_media_changed(BlockDriverState *bs) |
| 1535 | { |
| 1536 | BlockDriver *drv = bs->drv; |
| 1537 | int ret; |
| 1538 | |
| 1539 | if (!drv || !drv->bdrv_media_changed) |
| 1540 | ret = -ENOTSUP; |
| 1541 | else |
| 1542 | ret = drv->bdrv_media_changed(bs); |
| 1543 | if (ret == -ENOTSUP) |
| 1544 | ret = bs->media_changed; |
| 1545 | bs->media_changed = 0; |
| 1546 | return ret; |
| 1547 | } |
| 1548 | |
| 1549 | /** |
| 1550 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray |
| 1551 | */ |
| 1552 | void bdrv_eject(BlockDriverState *bs, int eject_flag) |
| 1553 | { |
| 1554 | BlockDriver *drv = bs->drv; |
| 1555 | int ret; |
| 1556 | |
| 1557 | if (!drv || !drv->bdrv_eject) { |
| 1558 | ret = -ENOTSUP; |
| 1559 | } else { |
| 1560 | ret = drv->bdrv_eject(bs, eject_flag); |
| 1561 | } |
| 1562 | if (ret == -ENOTSUP) { |
| 1563 | if (eject_flag) |
| 1564 | bdrv_close(bs); |
| 1565 | } |
| 1566 | } |
| 1567 | |
| 1568 | int bdrv_is_locked(BlockDriverState *bs) |
| 1569 | { |
| 1570 | return bs->locked; |
| 1571 | } |
| 1572 | |
| 1573 | /** |
| 1574 | * Lock or unlock the media (if it is locked, the user won't be able |
| 1575 | * to eject it manually). |
| 1576 | */ |
| 1577 | void bdrv_set_locked(BlockDriverState *bs, int locked) |
| 1578 | { |
| 1579 | BlockDriver *drv = bs->drv; |
| 1580 | |
| 1581 | bs->locked = locked; |
| 1582 | if (drv && drv->bdrv_set_locked) { |
| 1583 | drv->bdrv_set_locked(bs, locked); |
| 1584 | } |
| 1585 | } |
ths | 985a03b | 2007-12-24 16:10:43 +0000 | [diff] [blame] | 1586 | |
| 1587 | /* needed for generic scsi interface */ |
| 1588 | |
| 1589 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
| 1590 | { |
| 1591 | BlockDriver *drv = bs->drv; |
| 1592 | |
| 1593 | if (drv && drv->bdrv_ioctl) |
| 1594 | return drv->bdrv_ioctl(bs, req, buf); |
| 1595 | return -ENOTSUP; |
| 1596 | } |