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" |
pbrook | faf0796 | 2007-11-11 02:51:17 +0000 | [diff] [blame] | 25 | #include "qemu-common.h" |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 26 | #include "trace.h" |
aliguori | 376253e | 2009-03-05 23:01:23 +0000 | [diff] [blame] | 27 | #include "monitor.h" |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 28 | #include "block_int.h" |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 29 | #include "module.h" |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 30 | #include "qemu-objects.h" |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 31 | |
Juan Quintela | 71e72a1 | 2009-07-27 16:12:56 +0200 | [diff] [blame] | 32 | #ifdef CONFIG_BSD |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 33 | #include <sys/types.h> |
| 34 | #include <sys/stat.h> |
| 35 | #include <sys/ioctl.h> |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 36 | #include <sys/queue.h> |
blueswir1 | c5e9723 | 2009-03-07 20:06:23 +0000 | [diff] [blame] | 37 | #ifndef __DragonFly__ |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 38 | #include <sys/disk.h> |
| 39 | #endif |
blueswir1 | c5e9723 | 2009-03-07 20:06:23 +0000 | [diff] [blame] | 40 | #endif |
bellard | 7674e7b | 2005-04-26 21:59:26 +0000 | [diff] [blame] | 41 | |
aliguori | 49dc768 | 2009-03-08 16:26:59 +0000 | [diff] [blame] | 42 | #ifdef _WIN32 |
| 43 | #include <windows.h> |
| 44 | #endif |
| 45 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 46 | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
| 47 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
aliguori | c87c067 | 2009-04-07 18:43:20 +0000 | [diff] [blame] | 48 | BlockDriverCompletionFunc *cb, void *opaque); |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 49 | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
| 50 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 51 | BlockDriverCompletionFunc *cb, void *opaque); |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 52 | static BlockDriverAIOCB *bdrv_aio_flush_em(BlockDriverState *bs, |
| 53 | BlockDriverCompletionFunc *cb, void *opaque); |
Alexander Graf | 016f5cf | 2010-05-26 17:51:49 +0200 | [diff] [blame] | 54 | static BlockDriverAIOCB *bdrv_aio_noop_em(BlockDriverState *bs, |
| 55 | BlockDriverCompletionFunc *cb, void *opaque); |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 56 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 57 | uint8_t *buf, int nb_sectors); |
| 58 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
| 59 | const uint8_t *buf, int nb_sectors); |
bellard | ec530c8 | 2006-04-25 22:36:06 +0000 | [diff] [blame] | 60 | |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 61 | static QTAILQ_HEAD(, BlockDriverState) bdrv_states = |
| 62 | QTAILQ_HEAD_INITIALIZER(bdrv_states); |
blueswir1 | 7ee930d | 2008-09-17 19:04:14 +0000 | [diff] [blame] | 63 | |
Stefan Hajnoczi | 8a22f02 | 2010-04-13 10:29:33 +0100 | [diff] [blame] | 64 | static QLIST_HEAD(, BlockDriver) bdrv_drivers = |
| 65 | QLIST_HEAD_INITIALIZER(bdrv_drivers); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 66 | |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 67 | /* The device to use for VM snapshots */ |
| 68 | static BlockDriverState *bs_snapshots; |
| 69 | |
Markus Armbruster | eb85201 | 2009-10-27 18:41:44 +0100 | [diff] [blame] | 70 | /* If non-zero, use only whitelisted block drivers */ |
| 71 | static int use_bdrv_whitelist; |
| 72 | |
Stefan Hajnoczi | 9e0b22f | 2010-12-09 11:53:00 +0000 | [diff] [blame] | 73 | #ifdef _WIN32 |
| 74 | static int is_windows_drive_prefix(const char *filename) |
| 75 | { |
| 76 | return (((filename[0] >= 'a' && filename[0] <= 'z') || |
| 77 | (filename[0] >= 'A' && filename[0] <= 'Z')) && |
| 78 | filename[1] == ':'); |
| 79 | } |
| 80 | |
| 81 | int is_windows_drive(const char *filename) |
| 82 | { |
| 83 | if (is_windows_drive_prefix(filename) && |
| 84 | filename[2] == '\0') |
| 85 | return 1; |
| 86 | if (strstart(filename, "\\\\.\\", NULL) || |
| 87 | strstart(filename, "//./", NULL)) |
| 88 | return 1; |
| 89 | return 0; |
| 90 | } |
| 91 | #endif |
| 92 | |
| 93 | /* check if the path starts with "<protocol>:" */ |
| 94 | static int path_has_protocol(const char *path) |
| 95 | { |
| 96 | #ifdef _WIN32 |
| 97 | if (is_windows_drive(path) || |
| 98 | is_windows_drive_prefix(path)) { |
| 99 | return 0; |
| 100 | } |
| 101 | #endif |
| 102 | |
| 103 | return strchr(path, ':') != NULL; |
| 104 | } |
| 105 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 106 | int path_is_absolute(const char *path) |
| 107 | { |
| 108 | const char *p; |
bellard | 2166442 | 2007-01-07 18:22:37 +0000 | [diff] [blame] | 109 | #ifdef _WIN32 |
| 110 | /* specific case for names like: "\\.\d:" */ |
| 111 | if (*path == '/' || *path == '\\') |
| 112 | return 1; |
| 113 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 114 | p = strchr(path, ':'); |
| 115 | if (p) |
| 116 | p++; |
| 117 | else |
| 118 | p = path; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 119 | #ifdef _WIN32 |
| 120 | return (*p == '/' || *p == '\\'); |
| 121 | #else |
| 122 | return (*p == '/'); |
| 123 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | /* if filename is absolute, just copy it to dest. Otherwise, build a |
| 127 | path to it by considering it is relative to base_path. URL are |
| 128 | supported. */ |
| 129 | void path_combine(char *dest, int dest_size, |
| 130 | const char *base_path, |
| 131 | const char *filename) |
| 132 | { |
| 133 | const char *p, *p1; |
| 134 | int len; |
| 135 | |
| 136 | if (dest_size <= 0) |
| 137 | return; |
| 138 | if (path_is_absolute(filename)) { |
| 139 | pstrcpy(dest, dest_size, filename); |
| 140 | } else { |
| 141 | p = strchr(base_path, ':'); |
| 142 | if (p) |
| 143 | p++; |
| 144 | else |
| 145 | p = base_path; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 146 | p1 = strrchr(base_path, '/'); |
| 147 | #ifdef _WIN32 |
| 148 | { |
| 149 | const char *p2; |
| 150 | p2 = strrchr(base_path, '\\'); |
| 151 | if (!p1 || p2 > p1) |
| 152 | p1 = p2; |
| 153 | } |
| 154 | #endif |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 155 | if (p1) |
| 156 | p1++; |
| 157 | else |
| 158 | p1 = base_path; |
| 159 | if (p1 > p) |
| 160 | p = p1; |
| 161 | len = p - base_path; |
| 162 | if (len > dest_size - 1) |
| 163 | len = dest_size - 1; |
| 164 | memcpy(dest, base_path, len); |
| 165 | dest[len] = '\0'; |
| 166 | pstrcat(dest, dest_size, filename); |
| 167 | } |
| 168 | } |
| 169 | |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 170 | void bdrv_register(BlockDriver *bdrv) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 171 | { |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 172 | if (!bdrv->bdrv_aio_readv) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 173 | /* add AIO emulation layer */ |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 174 | bdrv->bdrv_aio_readv = bdrv_aio_readv_em; |
| 175 | bdrv->bdrv_aio_writev = bdrv_aio_writev_em; |
aliguori | eda578e | 2009-03-12 19:57:16 +0000 | [diff] [blame] | 176 | } else if (!bdrv->bdrv_read) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 177 | /* add synchronous IO emulation layer */ |
| 178 | bdrv->bdrv_read = bdrv_read_em; |
| 179 | bdrv->bdrv_write = bdrv_write_em; |
| 180 | } |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 181 | |
| 182 | if (!bdrv->bdrv_aio_flush) |
| 183 | bdrv->bdrv_aio_flush = bdrv_aio_flush_em; |
| 184 | |
Stefan Hajnoczi | 8a22f02 | 2010-04-13 10:29:33 +0100 | [diff] [blame] | 185 | QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 186 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 187 | |
| 188 | /* create a new block device (by default it is empty) */ |
| 189 | BlockDriverState *bdrv_new(const char *device_name) |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 190 | { |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 191 | BlockDriverState *bs; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 192 | |
| 193 | bs = qemu_mallocz(sizeof(BlockDriverState)); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 194 | pstrcpy(bs->device_name, sizeof(bs->device_name), device_name); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 195 | if (device_name[0] != '\0') { |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 196 | QTAILQ_INSERT_TAIL(&bdrv_states, bs, list); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 197 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 198 | return bs; |
| 199 | } |
| 200 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 201 | BlockDriver *bdrv_find_format(const char *format_name) |
| 202 | { |
| 203 | BlockDriver *drv1; |
Stefan Hajnoczi | 8a22f02 | 2010-04-13 10:29:33 +0100 | [diff] [blame] | 204 | QLIST_FOREACH(drv1, &bdrv_drivers, list) { |
| 205 | if (!strcmp(drv1->format_name, format_name)) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 206 | return drv1; |
Stefan Hajnoczi | 8a22f02 | 2010-04-13 10:29:33 +0100 | [diff] [blame] | 207 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 208 | } |
| 209 | return NULL; |
| 210 | } |
| 211 | |
Markus Armbruster | eb85201 | 2009-10-27 18:41:44 +0100 | [diff] [blame] | 212 | static int bdrv_is_whitelisted(BlockDriver *drv) |
| 213 | { |
| 214 | static const char *whitelist[] = { |
| 215 | CONFIG_BDRV_WHITELIST |
| 216 | }; |
| 217 | const char **p; |
| 218 | |
| 219 | if (!whitelist[0]) |
| 220 | return 1; /* no whitelist, anything goes */ |
| 221 | |
| 222 | for (p = whitelist; *p; p++) { |
| 223 | if (!strcmp(drv->format_name, *p)) { |
| 224 | return 1; |
| 225 | } |
| 226 | } |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | BlockDriver *bdrv_find_whitelisted_format(const char *format_name) |
| 231 | { |
| 232 | BlockDriver *drv = bdrv_find_format(format_name); |
| 233 | return drv && bdrv_is_whitelisted(drv) ? drv : NULL; |
| 234 | } |
| 235 | |
Kevin Wolf | 0e7e198 | 2009-05-18 16:42:10 +0200 | [diff] [blame] | 236 | int bdrv_create(BlockDriver *drv, const char* filename, |
| 237 | QEMUOptionParameter *options) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 238 | { |
| 239 | if (!drv->bdrv_create) |
| 240 | return -ENOTSUP; |
Kevin Wolf | 0e7e198 | 2009-05-18 16:42:10 +0200 | [diff] [blame] | 241 | |
| 242 | return drv->bdrv_create(filename, options); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 243 | } |
| 244 | |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 245 | int bdrv_create_file(const char* filename, QEMUOptionParameter *options) |
| 246 | { |
| 247 | BlockDriver *drv; |
| 248 | |
MORITA Kazutaka | b50cbab | 2010-05-26 11:35:36 +0900 | [diff] [blame] | 249 | drv = bdrv_find_protocol(filename); |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 250 | if (drv == NULL) { |
Stefan Hajnoczi | 16905d7 | 2010-11-30 15:14:14 +0000 | [diff] [blame] | 251 | return -ENOENT; |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | return bdrv_create(drv, filename, options); |
| 255 | } |
| 256 | |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 257 | #ifdef _WIN32 |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 258 | void get_tmp_filename(char *filename, int size) |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 259 | { |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 260 | char temp_dir[MAX_PATH]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 261 | |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 262 | GetTempPath(MAX_PATH, temp_dir); |
| 263 | GetTempFileName(temp_dir, "qem", 0, filename); |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 264 | } |
| 265 | #else |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 266 | void get_tmp_filename(char *filename, int size) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 267 | { |
| 268 | int fd; |
blueswir1 | 7ccfb2e | 2008-09-14 06:45:34 +0000 | [diff] [blame] | 269 | const char *tmpdir; |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 270 | /* XXX: race condition possible */ |
aurel32 | 0badc1e | 2008-03-10 00:05:34 +0000 | [diff] [blame] | 271 | tmpdir = getenv("TMPDIR"); |
| 272 | if (!tmpdir) |
| 273 | tmpdir = "/tmp"; |
| 274 | snprintf(filename, size, "%s/vl.XXXXXX", tmpdir); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 275 | fd = mkstemp(filename); |
| 276 | close(fd); |
| 277 | } |
bellard | d524939 | 2004-08-03 21:14:23 +0000 | [diff] [blame] | 278 | #endif |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 279 | |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 280 | /* |
| 281 | * Detect host devices. By convention, /dev/cdrom[N] is always |
| 282 | * recognized as a host CDROM. |
| 283 | */ |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 284 | static BlockDriver *find_hdev_driver(const char *filename) |
| 285 | { |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 286 | int score_max = 0, score; |
| 287 | BlockDriver *drv = NULL, *d; |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 288 | |
Stefan Hajnoczi | 8a22f02 | 2010-04-13 10:29:33 +0100 | [diff] [blame] | 289 | QLIST_FOREACH(d, &bdrv_drivers, list) { |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 290 | if (d->bdrv_probe_device) { |
| 291 | score = d->bdrv_probe_device(filename); |
| 292 | if (score > score_max) { |
| 293 | score_max = score; |
| 294 | drv = d; |
| 295 | } |
| 296 | } |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 297 | } |
| 298 | |
Christoph Hellwig | 508c7cb | 2009-06-15 14:04:22 +0200 | [diff] [blame] | 299 | return drv; |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 300 | } |
Christoph Hellwig | f3a5d3f | 2009-06-15 13:55:19 +0200 | [diff] [blame] | 301 | |
MORITA Kazutaka | b50cbab | 2010-05-26 11:35:36 +0900 | [diff] [blame] | 302 | BlockDriver *bdrv_find_protocol(const char *filename) |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 303 | { |
| 304 | BlockDriver *drv1; |
| 305 | char protocol[128]; |
| 306 | int len; |
| 307 | const char *p; |
| 308 | |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 309 | /* TODO Drivers without bdrv_file_open must be specified explicitly */ |
| 310 | |
Christoph Hellwig | 39508e7 | 2010-06-23 12:25:17 +0200 | [diff] [blame] | 311 | /* |
| 312 | * XXX(hch): we really should not let host device detection |
| 313 | * override an explicit protocol specification, but moving this |
| 314 | * later breaks access to device names with colons in them. |
| 315 | * Thanks to the brain-dead persistent naming schemes on udev- |
| 316 | * based Linux systems those actually are quite common. |
| 317 | */ |
| 318 | drv1 = find_hdev_driver(filename); |
| 319 | if (drv1) { |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 320 | return drv1; |
| 321 | } |
Christoph Hellwig | 39508e7 | 2010-06-23 12:25:17 +0200 | [diff] [blame] | 322 | |
Stefan Hajnoczi | 9e0b22f | 2010-12-09 11:53:00 +0000 | [diff] [blame] | 323 | if (!path_has_protocol(filename)) { |
Christoph Hellwig | 39508e7 | 2010-06-23 12:25:17 +0200 | [diff] [blame] | 324 | return bdrv_find_format("file"); |
| 325 | } |
Stefan Hajnoczi | 9e0b22f | 2010-12-09 11:53:00 +0000 | [diff] [blame] | 326 | p = strchr(filename, ':'); |
| 327 | assert(p != NULL); |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 328 | len = p - filename; |
| 329 | if (len > sizeof(protocol) - 1) |
| 330 | len = sizeof(protocol) - 1; |
| 331 | memcpy(protocol, filename, len); |
| 332 | protocol[len] = '\0'; |
| 333 | QLIST_FOREACH(drv1, &bdrv_drivers, list) { |
| 334 | if (drv1->protocol_name && |
| 335 | !strcmp(drv1->protocol_name, protocol)) { |
| 336 | return drv1; |
| 337 | } |
| 338 | } |
| 339 | return NULL; |
| 340 | } |
| 341 | |
Stefan Weil | c98ac35 | 2010-07-21 21:51:51 +0200 | [diff] [blame] | 342 | static int find_image_format(const char *filename, BlockDriver **pdrv) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 343 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 344 | int ret, score, score_max; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 345 | BlockDriver *drv1, *drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 346 | uint8_t buf[2048]; |
| 347 | BlockDriverState *bs; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 348 | |
Naphtali Sprei | f5edb01 | 2010-01-17 16:48:13 +0200 | [diff] [blame] | 349 | ret = bdrv_file_open(&bs, filename, 0); |
Stefan Weil | c98ac35 | 2010-07-21 21:51:51 +0200 | [diff] [blame] | 350 | if (ret < 0) { |
| 351 | *pdrv = NULL; |
| 352 | return ret; |
| 353 | } |
Nicholas Bellinger | f8ea0b0 | 2010-05-17 09:45:57 -0700 | [diff] [blame] | 354 | |
Kevin Wolf | 08a0055 | 2010-06-01 18:37:31 +0200 | [diff] [blame] | 355 | /* Return the raw BlockDriver * to scsi-generic devices or empty drives */ |
| 356 | if (bs->sg || !bdrv_is_inserted(bs)) { |
Nicholas A. Bellinger | 1a39685 | 2010-05-27 08:56:28 -0700 | [diff] [blame] | 357 | bdrv_delete(bs); |
Stefan Weil | c98ac35 | 2010-07-21 21:51:51 +0200 | [diff] [blame] | 358 | drv = bdrv_find_format("raw"); |
| 359 | if (!drv) { |
| 360 | ret = -ENOENT; |
| 361 | } |
| 362 | *pdrv = drv; |
| 363 | return ret; |
Nicholas A. Bellinger | 1a39685 | 2010-05-27 08:56:28 -0700 | [diff] [blame] | 364 | } |
Nicholas Bellinger | f8ea0b0 | 2010-05-17 09:45:57 -0700 | [diff] [blame] | 365 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 366 | ret = bdrv_pread(bs, 0, buf, sizeof(buf)); |
| 367 | bdrv_delete(bs); |
| 368 | if (ret < 0) { |
Stefan Weil | c98ac35 | 2010-07-21 21:51:51 +0200 | [diff] [blame] | 369 | *pdrv = NULL; |
| 370 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 371 | } |
| 372 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 373 | score_max = 0; |
Christoph Hellwig | 84a12e6 | 2010-04-07 22:30:24 +0200 | [diff] [blame] | 374 | drv = NULL; |
Stefan Hajnoczi | 8a22f02 | 2010-04-13 10:29:33 +0100 | [diff] [blame] | 375 | QLIST_FOREACH(drv1, &bdrv_drivers, list) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 376 | if (drv1->bdrv_probe) { |
| 377 | score = drv1->bdrv_probe(buf, ret, filename); |
| 378 | if (score > score_max) { |
| 379 | score_max = score; |
| 380 | drv = drv1; |
| 381 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 382 | } |
| 383 | } |
Stefan Weil | c98ac35 | 2010-07-21 21:51:51 +0200 | [diff] [blame] | 384 | if (!drv) { |
| 385 | ret = -ENOENT; |
| 386 | } |
| 387 | *pdrv = drv; |
| 388 | return ret; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 389 | } |
| 390 | |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 391 | /** |
| 392 | * Set the current 'total_sectors' value |
| 393 | */ |
| 394 | static int refresh_total_sectors(BlockDriverState *bs, int64_t hint) |
| 395 | { |
| 396 | BlockDriver *drv = bs->drv; |
| 397 | |
Nicholas Bellinger | 396759a | 2010-05-17 09:46:04 -0700 | [diff] [blame] | 398 | /* Do not attempt drv->bdrv_getlength() on scsi-generic devices */ |
| 399 | if (bs->sg) |
| 400 | return 0; |
| 401 | |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 402 | /* query actual device if possible, otherwise just trust the hint */ |
| 403 | if (drv->bdrv_getlength) { |
| 404 | int64_t length = drv->bdrv_getlength(bs); |
| 405 | if (length < 0) { |
| 406 | return length; |
| 407 | } |
| 408 | hint = length >> BDRV_SECTOR_BITS; |
| 409 | } |
| 410 | |
| 411 | bs->total_sectors = hint; |
| 412 | return 0; |
| 413 | } |
| 414 | |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 415 | /* |
Kevin Wolf | 5791533 | 2010-04-14 15:24:50 +0200 | [diff] [blame] | 416 | * Common part for opening disk images and files |
| 417 | */ |
| 418 | static int bdrv_open_common(BlockDriverState *bs, const char *filename, |
| 419 | int flags, BlockDriver *drv) |
| 420 | { |
| 421 | int ret, open_flags; |
| 422 | |
| 423 | assert(drv != NULL); |
| 424 | |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 425 | bs->file = NULL; |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 426 | bs->total_sectors = 0; |
Kevin Wolf | 5791533 | 2010-04-14 15:24:50 +0200 | [diff] [blame] | 427 | bs->encrypted = 0; |
| 428 | bs->valid_key = 0; |
| 429 | bs->open_flags = flags; |
| 430 | /* buffer_alignment defaulted to 512, drivers can change this value */ |
| 431 | bs->buffer_alignment = 512; |
| 432 | |
| 433 | pstrcpy(bs->filename, sizeof(bs->filename), filename); |
| 434 | |
| 435 | if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) { |
| 436 | return -ENOTSUP; |
| 437 | } |
| 438 | |
| 439 | bs->drv = drv; |
| 440 | bs->opaque = qemu_mallocz(drv->instance_size); |
| 441 | |
| 442 | /* |
| 443 | * Yes, BDRV_O_NOCACHE aka O_DIRECT means we have to present a |
| 444 | * write cache to the guest. We do need the fdatasync to flush |
| 445 | * out transactions for block allocations, and we maybe have a |
| 446 | * volatile write cache in our backing device to deal with. |
| 447 | */ |
| 448 | if (flags & (BDRV_O_CACHE_WB|BDRV_O_NOCACHE)) |
| 449 | bs->enable_write_cache = 1; |
| 450 | |
| 451 | /* |
| 452 | * Clear flags that are internal to the block layer before opening the |
| 453 | * image. |
| 454 | */ |
| 455 | open_flags = flags & ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING); |
| 456 | |
| 457 | /* |
| 458 | * Snapshots should be writeable. |
| 459 | */ |
| 460 | if (bs->is_temporary) { |
| 461 | open_flags |= BDRV_O_RDWR; |
| 462 | } |
| 463 | |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 464 | /* Open the image, either directly or using a protocol */ |
| 465 | if (drv->bdrv_file_open) { |
| 466 | ret = drv->bdrv_file_open(bs, filename, open_flags); |
| 467 | } else { |
| 468 | ret = bdrv_file_open(&bs->file, filename, open_flags); |
| 469 | if (ret >= 0) { |
| 470 | ret = drv->bdrv_open(bs, open_flags); |
| 471 | } |
| 472 | } |
| 473 | |
Kevin Wolf | 5791533 | 2010-04-14 15:24:50 +0200 | [diff] [blame] | 474 | if (ret < 0) { |
| 475 | goto free_and_fail; |
| 476 | } |
| 477 | |
| 478 | bs->keep_read_only = bs->read_only = !(open_flags & BDRV_O_RDWR); |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 479 | |
| 480 | ret = refresh_total_sectors(bs, bs->total_sectors); |
| 481 | if (ret < 0) { |
| 482 | goto free_and_fail; |
Kevin Wolf | 5791533 | 2010-04-14 15:24:50 +0200 | [diff] [blame] | 483 | } |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 484 | |
Kevin Wolf | 5791533 | 2010-04-14 15:24:50 +0200 | [diff] [blame] | 485 | #ifndef _WIN32 |
| 486 | if (bs->is_temporary) { |
| 487 | unlink(filename); |
| 488 | } |
| 489 | #endif |
| 490 | return 0; |
| 491 | |
| 492 | free_and_fail: |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 493 | if (bs->file) { |
| 494 | bdrv_delete(bs->file); |
| 495 | bs->file = NULL; |
| 496 | } |
Kevin Wolf | 5791533 | 2010-04-14 15:24:50 +0200 | [diff] [blame] | 497 | qemu_free(bs->opaque); |
| 498 | bs->opaque = NULL; |
| 499 | bs->drv = NULL; |
| 500 | return ret; |
| 501 | } |
| 502 | |
| 503 | /* |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 504 | * Opens a file using a protocol (file, host_device, nbd, ...) |
| 505 | */ |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 506 | int bdrv_file_open(BlockDriverState **pbs, const char *filename, int flags) |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 507 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 508 | BlockDriverState *bs; |
Christoph Hellwig | 6db9560 | 2010-04-05 16:53:57 +0200 | [diff] [blame] | 509 | BlockDriver *drv; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 510 | int ret; |
| 511 | |
MORITA Kazutaka | b50cbab | 2010-05-26 11:35:36 +0900 | [diff] [blame] | 512 | drv = bdrv_find_protocol(filename); |
Christoph Hellwig | 6db9560 | 2010-04-05 16:53:57 +0200 | [diff] [blame] | 513 | if (!drv) { |
| 514 | return -ENOENT; |
| 515 | } |
| 516 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 517 | bs = bdrv_new(""); |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 518 | ret = bdrv_open_common(bs, filename, flags, drv); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 519 | if (ret < 0) { |
| 520 | bdrv_delete(bs); |
| 521 | return ret; |
bellard | 3b0d4f6 | 2005-10-30 18:30:10 +0000 | [diff] [blame] | 522 | } |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 523 | bs->growable = 1; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 524 | *pbs = bs; |
| 525 | return 0; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 526 | } |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 527 | |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 528 | /* |
| 529 | * Opens a disk image (raw, qcow2, vmdk, ...) |
| 530 | */ |
Kevin Wolf | d6e9098 | 2010-03-31 14:40:27 +0200 | [diff] [blame] | 531 | int bdrv_open(BlockDriverState *bs, const char *filename, int flags, |
| 532 | BlockDriver *drv) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 533 | { |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 534 | int ret; |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 535 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 536 | if (flags & BDRV_O_SNAPSHOT) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 537 | BlockDriverState *bs1; |
| 538 | int64_t total_size; |
aliguori | 7c96d46 | 2008-09-12 17:54:13 +0000 | [diff] [blame] | 539 | int is_protocol = 0; |
Kevin Wolf | 91a073a | 2009-05-27 14:48:06 +0200 | [diff] [blame] | 540 | BlockDriver *bdrv_qcow2; |
| 541 | QEMUOptionParameter *options; |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 542 | char tmp_filename[PATH_MAX]; |
| 543 | char backing_filename[PATH_MAX]; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 544 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 545 | /* if snapshot, we create a temporary backing file and open it |
| 546 | instead of opening 'filename' directly */ |
| 547 | |
| 548 | /* if there is a backing file, use it */ |
| 549 | bs1 = bdrv_new(""); |
Kevin Wolf | d6e9098 | 2010-03-31 14:40:27 +0200 | [diff] [blame] | 550 | ret = bdrv_open(bs1, filename, 0, drv); |
aliguori | 51d7c00 | 2009-03-05 23:00:29 +0000 | [diff] [blame] | 551 | if (ret < 0) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 552 | bdrv_delete(bs1); |
aliguori | 51d7c00 | 2009-03-05 23:00:29 +0000 | [diff] [blame] | 553 | return ret; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 554 | } |
Jes Sorensen | 3e82990 | 2010-05-27 16:20:30 +0200 | [diff] [blame] | 555 | total_size = bdrv_getlength(bs1) & BDRV_SECTOR_MASK; |
aliguori | 7c96d46 | 2008-09-12 17:54:13 +0000 | [diff] [blame] | 556 | |
| 557 | if (bs1->drv && bs1->drv->protocol_name) |
| 558 | is_protocol = 1; |
| 559 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 560 | bdrv_delete(bs1); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 561 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 562 | get_tmp_filename(tmp_filename, sizeof(tmp_filename)); |
aliguori | 7c96d46 | 2008-09-12 17:54:13 +0000 | [diff] [blame] | 563 | |
| 564 | /* Real path is meaningless for protocols */ |
| 565 | if (is_protocol) |
| 566 | snprintf(backing_filename, sizeof(backing_filename), |
| 567 | "%s", filename); |
Kirill A. Shutemov | 114cdfa | 2009-12-25 18:19:22 +0000 | [diff] [blame] | 568 | else if (!realpath(filename, backing_filename)) |
| 569 | return -errno; |
aliguori | 7c96d46 | 2008-09-12 17:54:13 +0000 | [diff] [blame] | 570 | |
Kevin Wolf | 91a073a | 2009-05-27 14:48:06 +0200 | [diff] [blame] | 571 | bdrv_qcow2 = bdrv_find_format("qcow2"); |
| 572 | options = parse_option_parameters("", bdrv_qcow2->create_options, NULL); |
| 573 | |
Jes Sorensen | 3e82990 | 2010-05-27 16:20:30 +0200 | [diff] [blame] | 574 | set_option_parameter_int(options, BLOCK_OPT_SIZE, total_size); |
Kevin Wolf | 91a073a | 2009-05-27 14:48:06 +0200 | [diff] [blame] | 575 | set_option_parameter(options, BLOCK_OPT_BACKING_FILE, backing_filename); |
| 576 | if (drv) { |
| 577 | set_option_parameter(options, BLOCK_OPT_BACKING_FMT, |
| 578 | drv->format_name); |
| 579 | } |
| 580 | |
| 581 | ret = bdrv_create(bdrv_qcow2, tmp_filename, options); |
Jan Kiszka | d748768 | 2010-04-29 18:24:50 +0200 | [diff] [blame] | 582 | free_option_parameters(options); |
aliguori | 51d7c00 | 2009-03-05 23:00:29 +0000 | [diff] [blame] | 583 | if (ret < 0) { |
| 584 | return ret; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 585 | } |
Kevin Wolf | 91a073a | 2009-05-27 14:48:06 +0200 | [diff] [blame] | 586 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 587 | filename = tmp_filename; |
Kevin Wolf | 91a073a | 2009-05-27 14:48:06 +0200 | [diff] [blame] | 588 | drv = bdrv_qcow2; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 589 | bs->is_temporary = 1; |
| 590 | } |
bellard | 712e787 | 2005-04-28 21:09:32 +0000 | [diff] [blame] | 591 | |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 592 | /* Find the right image format driver */ |
Christoph Hellwig | 6db9560 | 2010-04-05 16:53:57 +0200 | [diff] [blame] | 593 | if (!drv) { |
Stefan Weil | c98ac35 | 2010-07-21 21:51:51 +0200 | [diff] [blame] | 594 | ret = find_image_format(filename, &drv); |
aliguori | 51d7c00 | 2009-03-05 23:00:29 +0000 | [diff] [blame] | 595 | } |
Christoph Hellwig | 6987307 | 2010-01-20 18:13:25 +0100 | [diff] [blame] | 596 | |
aliguori | 51d7c00 | 2009-03-05 23:00:29 +0000 | [diff] [blame] | 597 | if (!drv) { |
aliguori | 51d7c00 | 2009-03-05 23:00:29 +0000 | [diff] [blame] | 598 | goto unlink_and_fail; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 599 | } |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 600 | |
| 601 | /* Open the image */ |
| 602 | ret = bdrv_open_common(bs, filename, flags, drv); |
| 603 | if (ret < 0) { |
Christoph Hellwig | 6987307 | 2010-01-20 18:13:25 +0100 | [diff] [blame] | 604 | goto unlink_and_fail; |
| 605 | } |
| 606 | |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 607 | /* If there is a backing file, use it */ |
| 608 | if ((flags & BDRV_O_NO_BACKING) == 0 && bs->backing_file[0] != '\0') { |
| 609 | char backing_filename[PATH_MAX]; |
| 610 | int back_flags; |
| 611 | BlockDriver *back_drv = NULL; |
| 612 | |
| 613 | bs->backing_hd = bdrv_new(""); |
Stefan Hajnoczi | df2dbb4 | 2010-12-02 16:54:13 +0000 | [diff] [blame] | 614 | |
| 615 | if (path_has_protocol(bs->backing_file)) { |
| 616 | pstrcpy(backing_filename, sizeof(backing_filename), |
| 617 | bs->backing_file); |
| 618 | } else { |
| 619 | path_combine(backing_filename, sizeof(backing_filename), |
| 620 | filename, bs->backing_file); |
| 621 | } |
| 622 | |
| 623 | if (bs->backing_format[0] != '\0') { |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 624 | back_drv = bdrv_find_format(bs->backing_format); |
Stefan Hajnoczi | df2dbb4 | 2010-12-02 16:54:13 +0000 | [diff] [blame] | 625 | } |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 626 | |
| 627 | /* backing files always opened read-only */ |
| 628 | back_flags = |
| 629 | flags & ~(BDRV_O_RDWR | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING); |
| 630 | |
| 631 | ret = bdrv_open(bs->backing_hd, backing_filename, back_flags, back_drv); |
| 632 | if (ret < 0) { |
| 633 | bdrv_close(bs); |
| 634 | return ret; |
| 635 | } |
| 636 | if (bs->is_temporary) { |
| 637 | bs->backing_hd->keep_read_only = !(flags & BDRV_O_RDWR); |
| 638 | } else { |
| 639 | /* base image inherits from "parent" */ |
| 640 | bs->backing_hd->keep_read_only = bs->keep_read_only; |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | if (!bdrv_key_required(bs)) { |
| 645 | /* call the change callback */ |
| 646 | bs->media_changed = 1; |
| 647 | if (bs->change_cb) |
Christoph Hellwig | db97ee6 | 2011-01-24 13:32:41 +0100 | [diff] [blame] | 648 | bs->change_cb(bs->change_opaque, CHANGE_MEDIA); |
Kevin Wolf | b6ce07a | 2010-04-12 16:37:13 +0200 | [diff] [blame] | 649 | } |
| 650 | |
| 651 | return 0; |
| 652 | |
| 653 | unlink_and_fail: |
| 654 | if (bs->is_temporary) { |
| 655 | unlink(filename); |
| 656 | } |
| 657 | return ret; |
| 658 | } |
| 659 | |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 660 | void bdrv_close(BlockDriverState *bs) |
| 661 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 662 | if (bs->drv) { |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 663 | if (bs == bs_snapshots) { |
| 664 | bs_snapshots = NULL; |
| 665 | } |
Stefan Hajnoczi | 557df6a | 2010-04-17 10:49:06 +0100 | [diff] [blame] | 666 | if (bs->backing_hd) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 667 | bdrv_delete(bs->backing_hd); |
Stefan Hajnoczi | 557df6a | 2010-04-17 10:49:06 +0100 | [diff] [blame] | 668 | bs->backing_hd = NULL; |
| 669 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 670 | bs->drv->bdrv_close(bs); |
| 671 | qemu_free(bs->opaque); |
| 672 | #ifdef _WIN32 |
| 673 | if (bs->is_temporary) { |
| 674 | unlink(bs->filename); |
| 675 | } |
bellard | 67b915a | 2004-03-31 23:37:16 +0000 | [diff] [blame] | 676 | #endif |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 677 | bs->opaque = NULL; |
| 678 | bs->drv = NULL; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 679 | |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 680 | if (bs->file != NULL) { |
| 681 | bdrv_close(bs->file); |
| 682 | } |
| 683 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 684 | /* call the change callback */ |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 685 | bs->media_changed = 1; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 686 | if (bs->change_cb) |
Christoph Hellwig | db97ee6 | 2011-01-24 13:32:41 +0100 | [diff] [blame] | 687 | bs->change_cb(bs->change_opaque, CHANGE_MEDIA); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 688 | } |
| 689 | } |
| 690 | |
MORITA Kazutaka | 2bc93fe | 2010-05-28 11:44:57 +0900 | [diff] [blame] | 691 | void bdrv_close_all(void) |
| 692 | { |
| 693 | BlockDriverState *bs; |
| 694 | |
| 695 | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
| 696 | bdrv_close(bs); |
| 697 | } |
| 698 | } |
| 699 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 700 | void bdrv_delete(BlockDriverState *bs) |
| 701 | { |
Markus Armbruster | 18846de | 2010-06-29 16:58:30 +0200 | [diff] [blame] | 702 | assert(!bs->peer); |
| 703 | |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 704 | /* remove from list, if necessary */ |
| 705 | if (bs->device_name[0] != '\0') { |
| 706 | QTAILQ_REMOVE(&bdrv_states, bs, list); |
| 707 | } |
aurel32 | 34c6f05 | 2008-04-08 19:51:21 +0000 | [diff] [blame] | 708 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 709 | bdrv_close(bs); |
Kevin Wolf | 66f82ce | 2010-04-14 14:17:38 +0200 | [diff] [blame] | 710 | if (bs->file != NULL) { |
| 711 | bdrv_delete(bs->file); |
| 712 | } |
| 713 | |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 714 | assert(bs != bs_snapshots); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 715 | qemu_free(bs); |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 716 | } |
| 717 | |
Markus Armbruster | 18846de | 2010-06-29 16:58:30 +0200 | [diff] [blame] | 718 | int bdrv_attach(BlockDriverState *bs, DeviceState *qdev) |
| 719 | { |
| 720 | if (bs->peer) { |
| 721 | return -EBUSY; |
| 722 | } |
| 723 | bs->peer = qdev; |
| 724 | return 0; |
| 725 | } |
| 726 | |
| 727 | void bdrv_detach(BlockDriverState *bs, DeviceState *qdev) |
| 728 | { |
| 729 | assert(bs->peer == qdev); |
| 730 | bs->peer = NULL; |
| 731 | } |
| 732 | |
| 733 | DeviceState *bdrv_get_attached(BlockDriverState *bs) |
| 734 | { |
| 735 | return bs->peer; |
| 736 | } |
| 737 | |
aliguori | e97fc19 | 2009-04-21 23:11:50 +0000 | [diff] [blame] | 738 | /* |
| 739 | * Run consistency checks on an image |
| 740 | * |
Kevin Wolf | e076f33 | 2010-06-29 11:43:13 +0200 | [diff] [blame] | 741 | * Returns 0 if the check could be completed (it doesn't mean that the image is |
| 742 | * free of errors) or -errno when an internal error occured. The results of the |
| 743 | * check are stored in res. |
aliguori | e97fc19 | 2009-04-21 23:11:50 +0000 | [diff] [blame] | 744 | */ |
Kevin Wolf | e076f33 | 2010-06-29 11:43:13 +0200 | [diff] [blame] | 745 | int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res) |
aliguori | e97fc19 | 2009-04-21 23:11:50 +0000 | [diff] [blame] | 746 | { |
| 747 | if (bs->drv->bdrv_check == NULL) { |
| 748 | return -ENOTSUP; |
| 749 | } |
| 750 | |
Kevin Wolf | e076f33 | 2010-06-29 11:43:13 +0200 | [diff] [blame] | 751 | memset(res, 0, sizeof(*res)); |
Kevin Wolf | 9ac228e | 2010-06-29 12:37:54 +0200 | [diff] [blame] | 752 | return bs->drv->bdrv_check(bs, res); |
aliguori | e97fc19 | 2009-04-21 23:11:50 +0000 | [diff] [blame] | 753 | } |
| 754 | |
Kevin Wolf | 8a42661 | 2010-07-16 17:17:01 +0200 | [diff] [blame] | 755 | #define COMMIT_BUF_SECTORS 2048 |
| 756 | |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 757 | /* commit COW file into the raw image */ |
| 758 | int bdrv_commit(BlockDriverState *bs) |
| 759 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 760 | BlockDriver *drv = bs->drv; |
Kevin Wolf | ee18119 | 2010-08-05 13:05:22 +0200 | [diff] [blame] | 761 | BlockDriver *backing_drv; |
Kevin Wolf | 8a42661 | 2010-07-16 17:17:01 +0200 | [diff] [blame] | 762 | int64_t sector, total_sectors; |
| 763 | int n, ro, open_flags; |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 764 | int ret = 0, rw_ret = 0; |
Kevin Wolf | 8a42661 | 2010-07-16 17:17:01 +0200 | [diff] [blame] | 765 | uint8_t *buf; |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 766 | char filename[1024]; |
| 767 | BlockDriverState *bs_rw, *bs_ro; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 768 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 769 | if (!drv) |
| 770 | return -ENOMEDIUM; |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 771 | |
| 772 | if (!bs->backing_hd) { |
| 773 | return -ENOTSUP; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 774 | } |
| 775 | |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 776 | if (bs->backing_hd->keep_read_only) { |
| 777 | return -EACCES; |
| 778 | } |
Kevin Wolf | ee18119 | 2010-08-05 13:05:22 +0200 | [diff] [blame] | 779 | |
| 780 | backing_drv = bs->backing_hd->drv; |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 781 | ro = bs->backing_hd->read_only; |
| 782 | strncpy(filename, bs->backing_hd->filename, sizeof(filename)); |
| 783 | open_flags = bs->backing_hd->open_flags; |
| 784 | |
| 785 | if (ro) { |
| 786 | /* re-open as RW */ |
| 787 | bdrv_delete(bs->backing_hd); |
| 788 | bs->backing_hd = NULL; |
| 789 | bs_rw = bdrv_new(""); |
Kevin Wolf | ee18119 | 2010-08-05 13:05:22 +0200 | [diff] [blame] | 790 | rw_ret = bdrv_open(bs_rw, filename, open_flags | BDRV_O_RDWR, |
| 791 | backing_drv); |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 792 | if (rw_ret < 0) { |
| 793 | bdrv_delete(bs_rw); |
| 794 | /* try to re-open read-only */ |
| 795 | bs_ro = bdrv_new(""); |
Kevin Wolf | ee18119 | 2010-08-05 13:05:22 +0200 | [diff] [blame] | 796 | ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR, |
| 797 | backing_drv); |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 798 | if (ret < 0) { |
| 799 | bdrv_delete(bs_ro); |
| 800 | /* drive not functional anymore */ |
| 801 | bs->drv = NULL; |
| 802 | return ret; |
| 803 | } |
| 804 | bs->backing_hd = bs_ro; |
| 805 | return rw_ret; |
| 806 | } |
| 807 | bs->backing_hd = bs_rw; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 808 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 809 | |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 810 | total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS; |
Kevin Wolf | 8a42661 | 2010-07-16 17:17:01 +0200 | [diff] [blame] | 811 | buf = qemu_malloc(COMMIT_BUF_SECTORS * BDRV_SECTOR_SIZE); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 812 | |
Kevin Wolf | 8a42661 | 2010-07-16 17:17:01 +0200 | [diff] [blame] | 813 | for (sector = 0; sector < total_sectors; sector += n) { |
| 814 | if (drv->bdrv_is_allocated(bs, sector, COMMIT_BUF_SECTORS, &n)) { |
| 815 | |
| 816 | if (bdrv_read(bs, sector, buf, n) != 0) { |
| 817 | ret = -EIO; |
| 818 | goto ro_cleanup; |
| 819 | } |
| 820 | |
| 821 | if (bdrv_write(bs->backing_hd, sector, buf, n) != 0) { |
| 822 | ret = -EIO; |
| 823 | goto ro_cleanup; |
| 824 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 825 | } |
| 826 | } |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 827 | |
Christoph Hellwig | 1d44952 | 2010-01-17 12:32:30 +0100 | [diff] [blame] | 828 | if (drv->bdrv_make_empty) { |
| 829 | ret = drv->bdrv_make_empty(bs); |
| 830 | bdrv_flush(bs); |
| 831 | } |
bellard | 95389c8 | 2005-12-18 18:28:15 +0000 | [diff] [blame] | 832 | |
Christoph Hellwig | 3f5075a | 2010-01-12 13:49:23 +0100 | [diff] [blame] | 833 | /* |
| 834 | * Make sure all data we wrote to the backing device is actually |
| 835 | * stable on disk. |
| 836 | */ |
| 837 | if (bs->backing_hd) |
| 838 | bdrv_flush(bs->backing_hd); |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 839 | |
| 840 | ro_cleanup: |
Kevin Wolf | 8a42661 | 2010-07-16 17:17:01 +0200 | [diff] [blame] | 841 | qemu_free(buf); |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 842 | |
| 843 | if (ro) { |
| 844 | /* re-open as RO */ |
| 845 | bdrv_delete(bs->backing_hd); |
| 846 | bs->backing_hd = NULL; |
| 847 | bs_ro = bdrv_new(""); |
Kevin Wolf | ee18119 | 2010-08-05 13:05:22 +0200 | [diff] [blame] | 848 | ret = bdrv_open(bs_ro, filename, open_flags & ~BDRV_O_RDWR, |
| 849 | backing_drv); |
Naphtali Sprei | 4dca4b6 | 2010-02-14 13:39:18 +0200 | [diff] [blame] | 850 | if (ret < 0) { |
| 851 | bdrv_delete(bs_ro); |
| 852 | /* drive not functional anymore */ |
| 853 | bs->drv = NULL; |
| 854 | return ret; |
| 855 | } |
| 856 | bs->backing_hd = bs_ro; |
| 857 | bs->backing_hd->keep_read_only = 0; |
| 858 | } |
| 859 | |
Christoph Hellwig | 1d44952 | 2010-01-17 12:32:30 +0100 | [diff] [blame] | 860 | return ret; |
bellard | 33e3963 | 2003-07-06 17:15:21 +0000 | [diff] [blame] | 861 | } |
| 862 | |
Markus Armbruster | 6ab4b5a | 2010-06-02 18:55:18 +0200 | [diff] [blame] | 863 | void bdrv_commit_all(void) |
| 864 | { |
| 865 | BlockDriverState *bs; |
| 866 | |
| 867 | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
| 868 | bdrv_commit(bs); |
| 869 | } |
| 870 | } |
| 871 | |
Kevin Wolf | 756e673 | 2010-01-12 12:55:17 +0100 | [diff] [blame] | 872 | /* |
| 873 | * Return values: |
| 874 | * 0 - success |
| 875 | * -EINVAL - backing format specified, but no file |
| 876 | * -ENOSPC - can't update the backing file because no space is left in the |
| 877 | * image file header |
| 878 | * -ENOTSUP - format driver doesn't support changing the backing file |
| 879 | */ |
| 880 | int bdrv_change_backing_file(BlockDriverState *bs, |
| 881 | const char *backing_file, const char *backing_fmt) |
| 882 | { |
| 883 | BlockDriver *drv = bs->drv; |
| 884 | |
| 885 | if (drv->bdrv_change_backing_file != NULL) { |
| 886 | return drv->bdrv_change_backing_file(bs, backing_file, backing_fmt); |
| 887 | } else { |
| 888 | return -ENOTSUP; |
| 889 | } |
| 890 | } |
| 891 | |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 892 | static int bdrv_check_byte_request(BlockDriverState *bs, int64_t offset, |
| 893 | size_t size) |
| 894 | { |
| 895 | int64_t len; |
| 896 | |
| 897 | if (!bdrv_is_inserted(bs)) |
| 898 | return -ENOMEDIUM; |
| 899 | |
| 900 | if (bs->growable) |
| 901 | return 0; |
| 902 | |
| 903 | len = bdrv_getlength(bs); |
| 904 | |
Kevin Wolf | fbb7b4e | 2009-05-08 14:47:24 +0200 | [diff] [blame] | 905 | if (offset < 0) |
| 906 | return -EIO; |
| 907 | |
| 908 | if ((offset > len) || (len - offset < size)) |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 909 | return -EIO; |
| 910 | |
| 911 | return 0; |
| 912 | } |
| 913 | |
| 914 | static int bdrv_check_request(BlockDriverState *bs, int64_t sector_num, |
| 915 | int nb_sectors) |
| 916 | { |
Jes Sorensen | eb5a316 | 2010-05-27 16:20:31 +0200 | [diff] [blame] | 917 | return bdrv_check_byte_request(bs, sector_num * BDRV_SECTOR_SIZE, |
| 918 | nb_sectors * BDRV_SECTOR_SIZE); |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 919 | } |
| 920 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 921 | /* return < 0 if error. See bdrv_write() for the return codes */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 922 | int bdrv_read(BlockDriverState *bs, int64_t sector_num, |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 923 | uint8_t *buf, int nb_sectors) |
| 924 | { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 925 | BlockDriver *drv = bs->drv; |
| 926 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 927 | if (!drv) |
| 928 | return -ENOMEDIUM; |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 929 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
| 930 | return -EIO; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 931 | |
aliguori | eda578e | 2009-03-12 19:57:16 +0000 | [diff] [blame] | 932 | return drv->bdrv_read(bs, sector_num, buf, nb_sectors); |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 933 | } |
| 934 | |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 935 | static void set_dirty_bitmap(BlockDriverState *bs, int64_t sector_num, |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 936 | int nb_sectors, int dirty) |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 937 | { |
| 938 | int64_t start, end; |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 939 | unsigned long val, idx, bit; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 940 | |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 941 | start = sector_num / BDRV_SECTORS_PER_DIRTY_CHUNK; |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 942 | end = (sector_num + nb_sectors - 1) / BDRV_SECTORS_PER_DIRTY_CHUNK; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 943 | |
| 944 | for (; start <= end; start++) { |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 945 | idx = start / (sizeof(unsigned long) * 8); |
| 946 | bit = start % (sizeof(unsigned long) * 8); |
| 947 | val = bs->dirty_bitmap[idx]; |
| 948 | if (dirty) { |
Marcelo Tosatti | 6d59fec | 2010-11-08 17:02:54 -0200 | [diff] [blame] | 949 | if (!(val & (1UL << bit))) { |
Liran Schour | aaa0eb7 | 2010-01-26 10:31:48 +0200 | [diff] [blame] | 950 | bs->dirty_count++; |
Marcelo Tosatti | 6d59fec | 2010-11-08 17:02:54 -0200 | [diff] [blame] | 951 | val |= 1UL << bit; |
Liran Schour | aaa0eb7 | 2010-01-26 10:31:48 +0200 | [diff] [blame] | 952 | } |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 953 | } else { |
Marcelo Tosatti | 6d59fec | 2010-11-08 17:02:54 -0200 | [diff] [blame] | 954 | if (val & (1UL << bit)) { |
Liran Schour | aaa0eb7 | 2010-01-26 10:31:48 +0200 | [diff] [blame] | 955 | bs->dirty_count--; |
Marcelo Tosatti | 6d59fec | 2010-11-08 17:02:54 -0200 | [diff] [blame] | 956 | val &= ~(1UL << bit); |
Liran Schour | aaa0eb7 | 2010-01-26 10:31:48 +0200 | [diff] [blame] | 957 | } |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 958 | } |
| 959 | bs->dirty_bitmap[idx] = val; |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 960 | } |
| 961 | } |
| 962 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 963 | /* Return < 0 if error. Important errors are: |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 964 | -EIO generic I/O error (may happen for all errors) |
| 965 | -ENOMEDIUM No media inserted. |
| 966 | -EINVAL Invalid sector number or nb_sectors |
| 967 | -EACCES Trying to write a read-only device |
| 968 | */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 969 | int bdrv_write(BlockDriverState *bs, int64_t sector_num, |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 970 | const uint8_t *buf, int nb_sectors) |
| 971 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 972 | BlockDriver *drv = bs->drv; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 973 | if (!bs->drv) |
| 974 | return -ENOMEDIUM; |
bellard | 0849bf0 | 2003-06-30 23:17:31 +0000 | [diff] [blame] | 975 | if (bs->read_only) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 976 | return -EACCES; |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 977 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
| 978 | return -EIO; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 979 | |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 980 | if (bs->dirty_bitmap) { |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 981 | set_dirty_bitmap(bs, sector_num, nb_sectors, 1); |
| 982 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 983 | |
Kevin Wolf | 294cc35 | 2010-04-28 14:34:01 +0200 | [diff] [blame] | 984 | if (bs->wr_highest_sector < sector_num + nb_sectors - 1) { |
| 985 | bs->wr_highest_sector = sector_num + nb_sectors - 1; |
| 986 | } |
| 987 | |
aliguori | 42fb280 | 2009-01-15 20:43:39 +0000 | [diff] [blame] | 988 | return drv->bdrv_write(bs, sector_num, buf, nb_sectors); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 989 | } |
| 990 | |
aliguori | eda578e | 2009-03-12 19:57:16 +0000 | [diff] [blame] | 991 | int bdrv_pread(BlockDriverState *bs, int64_t offset, |
| 992 | void *buf, int count1) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 993 | { |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 994 | uint8_t tmp_buf[BDRV_SECTOR_SIZE]; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 995 | int len, nb_sectors, count; |
| 996 | int64_t sector_num; |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 997 | int ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 998 | |
| 999 | count = count1; |
| 1000 | /* first read to align to sector start */ |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1001 | len = (BDRV_SECTOR_SIZE - offset) & (BDRV_SECTOR_SIZE - 1); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1002 | if (len > count) |
| 1003 | len = count; |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1004 | sector_num = offset >> BDRV_SECTOR_BITS; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1005 | if (len > 0) { |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1006 | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
| 1007 | return ret; |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1008 | memcpy(buf, tmp_buf + (offset & (BDRV_SECTOR_SIZE - 1)), len); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1009 | count -= len; |
| 1010 | if (count == 0) |
| 1011 | return count1; |
| 1012 | sector_num++; |
| 1013 | buf += len; |
| 1014 | } |
| 1015 | |
| 1016 | /* read the sectors "in place" */ |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1017 | nb_sectors = count >> BDRV_SECTOR_BITS; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1018 | if (nb_sectors > 0) { |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1019 | if ((ret = bdrv_read(bs, sector_num, buf, nb_sectors)) < 0) |
| 1020 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1021 | sector_num += nb_sectors; |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1022 | len = nb_sectors << BDRV_SECTOR_BITS; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1023 | buf += len; |
| 1024 | count -= len; |
| 1025 | } |
| 1026 | |
| 1027 | /* add data from the last sector */ |
| 1028 | if (count > 0) { |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1029 | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
| 1030 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1031 | memcpy(buf, tmp_buf, count); |
| 1032 | } |
| 1033 | return count1; |
| 1034 | } |
| 1035 | |
aliguori | eda578e | 2009-03-12 19:57:16 +0000 | [diff] [blame] | 1036 | int bdrv_pwrite(BlockDriverState *bs, int64_t offset, |
| 1037 | const void *buf, int count1) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1038 | { |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1039 | uint8_t tmp_buf[BDRV_SECTOR_SIZE]; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1040 | int len, nb_sectors, count; |
| 1041 | int64_t sector_num; |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1042 | int ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1043 | |
| 1044 | count = count1; |
| 1045 | /* first write to align to sector start */ |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1046 | len = (BDRV_SECTOR_SIZE - offset) & (BDRV_SECTOR_SIZE - 1); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1047 | if (len > count) |
| 1048 | len = count; |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1049 | sector_num = offset >> BDRV_SECTOR_BITS; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1050 | if (len > 0) { |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1051 | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
| 1052 | return ret; |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1053 | memcpy(tmp_buf + (offset & (BDRV_SECTOR_SIZE - 1)), buf, len); |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1054 | if ((ret = bdrv_write(bs, sector_num, tmp_buf, 1)) < 0) |
| 1055 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1056 | count -= len; |
| 1057 | if (count == 0) |
| 1058 | return count1; |
| 1059 | sector_num++; |
| 1060 | buf += len; |
| 1061 | } |
| 1062 | |
| 1063 | /* write the sectors "in place" */ |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1064 | nb_sectors = count >> BDRV_SECTOR_BITS; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1065 | if (nb_sectors > 0) { |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1066 | if ((ret = bdrv_write(bs, sector_num, buf, nb_sectors)) < 0) |
| 1067 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1068 | sector_num += nb_sectors; |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1069 | len = nb_sectors << BDRV_SECTOR_BITS; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1070 | buf += len; |
| 1071 | count -= len; |
| 1072 | } |
| 1073 | |
| 1074 | /* add data from the last sector */ |
| 1075 | if (count > 0) { |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1076 | if ((ret = bdrv_read(bs, sector_num, tmp_buf, 1)) < 0) |
| 1077 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1078 | memcpy(tmp_buf, buf, count); |
Kevin Wolf | 9a8c4cc | 2010-01-20 15:03:02 +0100 | [diff] [blame] | 1079 | if ((ret = bdrv_write(bs, sector_num, tmp_buf, 1)) < 0) |
| 1080 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1081 | } |
| 1082 | return count1; |
| 1083 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1084 | |
Kevin Wolf | f08145f | 2010-06-16 16:38:15 +0200 | [diff] [blame] | 1085 | /* |
| 1086 | * Writes to the file and ensures that no writes are reordered across this |
| 1087 | * request (acts as a barrier) |
| 1088 | * |
| 1089 | * Returns 0 on success, -errno in error cases. |
| 1090 | */ |
| 1091 | int bdrv_pwrite_sync(BlockDriverState *bs, int64_t offset, |
| 1092 | const void *buf, int count) |
| 1093 | { |
| 1094 | int ret; |
| 1095 | |
| 1096 | ret = bdrv_pwrite(bs, offset, buf, count); |
| 1097 | if (ret < 0) { |
| 1098 | return ret; |
| 1099 | } |
| 1100 | |
| 1101 | /* No flush needed for cache=writethrough, it uses O_DSYNC */ |
| 1102 | if ((bs->open_flags & BDRV_O_CACHE_MASK) != 0) { |
| 1103 | bdrv_flush(bs); |
| 1104 | } |
| 1105 | |
| 1106 | return 0; |
| 1107 | } |
| 1108 | |
| 1109 | /* |
| 1110 | * Writes to the file and ensures that no writes are reordered across this |
| 1111 | * request (acts as a barrier) |
| 1112 | * |
| 1113 | * Returns 0 on success, -errno in error cases. |
| 1114 | */ |
| 1115 | int bdrv_write_sync(BlockDriverState *bs, int64_t sector_num, |
| 1116 | const uint8_t *buf, int nb_sectors) |
| 1117 | { |
| 1118 | return bdrv_pwrite_sync(bs, BDRV_SECTOR_SIZE * sector_num, |
| 1119 | buf, BDRV_SECTOR_SIZE * nb_sectors); |
| 1120 | } |
| 1121 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1122 | /** |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1123 | * Truncate file to 'offset' bytes (needed only for file protocols) |
| 1124 | */ |
| 1125 | int bdrv_truncate(BlockDriverState *bs, int64_t offset) |
| 1126 | { |
| 1127 | BlockDriver *drv = bs->drv; |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 1128 | int ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1129 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1130 | return -ENOMEDIUM; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1131 | if (!drv->bdrv_truncate) |
| 1132 | return -ENOTSUP; |
Naphtali Sprei | 59f2689 | 2009-10-26 16:25:16 +0200 | [diff] [blame] | 1133 | if (bs->read_only) |
| 1134 | return -EACCES; |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 1135 | ret = drv->bdrv_truncate(bs, offset); |
| 1136 | if (ret == 0) { |
| 1137 | ret = refresh_total_sectors(bs, offset >> BDRV_SECTOR_BITS); |
Christoph Hellwig | db97ee6 | 2011-01-24 13:32:41 +0100 | [diff] [blame] | 1138 | if (bs->change_cb) { |
| 1139 | bs->change_cb(bs->change_opaque, CHANGE_SIZE); |
| 1140 | } |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 1141 | } |
| 1142 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1143 | } |
| 1144 | |
| 1145 | /** |
| 1146 | * Length of a file in bytes. Return < 0 if error or unknown. |
| 1147 | */ |
| 1148 | int64_t bdrv_getlength(BlockDriverState *bs) |
| 1149 | { |
| 1150 | BlockDriver *drv = bs->drv; |
| 1151 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1152 | return -ENOMEDIUM; |
Stefan Hajnoczi | 5176228 | 2010-04-19 16:56:41 +0100 | [diff] [blame] | 1153 | |
| 1154 | /* Fixed size devices use the total_sectors value for speed instead of |
| 1155 | issuing a length query (like lseek) on each call. Also, legacy block |
| 1156 | drivers don't provide a bdrv_getlength function and must use |
| 1157 | total_sectors. */ |
| 1158 | if (!bs->growable || !drv->bdrv_getlength) { |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1159 | return bs->total_sectors * BDRV_SECTOR_SIZE; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1160 | } |
| 1161 | return drv->bdrv_getlength(bs); |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 1162 | } |
| 1163 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1164 | /* return 0 as number of sectors if no device present or error */ |
ths | 96b8f13 | 2007-12-17 01:35:20 +0000 | [diff] [blame] | 1165 | void bdrv_get_geometry(BlockDriverState *bs, uint64_t *nb_sectors_ptr) |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 1166 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1167 | int64_t length; |
| 1168 | length = bdrv_getlength(bs); |
| 1169 | if (length < 0) |
| 1170 | length = 0; |
| 1171 | else |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1172 | length = length >> BDRV_SECTOR_BITS; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1173 | *nb_sectors_ptr = length; |
bellard | fc01f7e | 2003-06-30 10:03:06 +0000 | [diff] [blame] | 1174 | } |
bellard | cf98951 | 2004-02-16 21:56:36 +0000 | [diff] [blame] | 1175 | |
aliguori | f3d54fc | 2008-11-25 21:50:24 +0000 | [diff] [blame] | 1176 | struct partition { |
| 1177 | uint8_t boot_ind; /* 0x80 - active */ |
| 1178 | uint8_t head; /* starting head */ |
| 1179 | uint8_t sector; /* starting sector */ |
| 1180 | uint8_t cyl; /* starting cylinder */ |
| 1181 | uint8_t sys_ind; /* What partition type */ |
| 1182 | uint8_t end_head; /* end head */ |
| 1183 | uint8_t end_sector; /* end sector */ |
| 1184 | uint8_t end_cyl; /* end cylinder */ |
| 1185 | uint32_t start_sect; /* starting sector counting from 0 */ |
| 1186 | uint32_t nr_sects; /* nr of sectors in partition */ |
| 1187 | } __attribute__((packed)); |
| 1188 | |
| 1189 | /* try to guess the disk logical geometry from the MSDOS partition table. Return 0 if OK, -1 if could not guess */ |
| 1190 | static int guess_disk_lchs(BlockDriverState *bs, |
| 1191 | int *pcylinders, int *pheads, int *psectors) |
| 1192 | { |
Jes Sorensen | eb5a316 | 2010-05-27 16:20:31 +0200 | [diff] [blame] | 1193 | uint8_t buf[BDRV_SECTOR_SIZE]; |
aliguori | f3d54fc | 2008-11-25 21:50:24 +0000 | [diff] [blame] | 1194 | int ret, i, heads, sectors, cylinders; |
| 1195 | struct partition *p; |
| 1196 | uint32_t nr_sects; |
blueswir1 | a38131b | 2008-12-05 17:56:40 +0000 | [diff] [blame] | 1197 | uint64_t nb_sectors; |
aliguori | f3d54fc | 2008-11-25 21:50:24 +0000 | [diff] [blame] | 1198 | |
| 1199 | bdrv_get_geometry(bs, &nb_sectors); |
| 1200 | |
| 1201 | ret = bdrv_read(bs, 0, buf, 1); |
| 1202 | if (ret < 0) |
| 1203 | return -1; |
| 1204 | /* test msdos magic */ |
| 1205 | if (buf[510] != 0x55 || buf[511] != 0xaa) |
| 1206 | return -1; |
| 1207 | for(i = 0; i < 4; i++) { |
| 1208 | p = ((struct partition *)(buf + 0x1be)) + i; |
| 1209 | nr_sects = le32_to_cpu(p->nr_sects); |
| 1210 | if (nr_sects && p->end_head) { |
| 1211 | /* We make the assumption that the partition terminates on |
| 1212 | a cylinder boundary */ |
| 1213 | heads = p->end_head + 1; |
| 1214 | sectors = p->end_sector & 63; |
| 1215 | if (sectors == 0) |
| 1216 | continue; |
| 1217 | cylinders = nb_sectors / (heads * sectors); |
| 1218 | if (cylinders < 1 || cylinders > 16383) |
| 1219 | continue; |
| 1220 | *pheads = heads; |
| 1221 | *psectors = sectors; |
| 1222 | *pcylinders = cylinders; |
| 1223 | #if 0 |
| 1224 | printf("guessed geometry: LCHS=%d %d %d\n", |
| 1225 | cylinders, heads, sectors); |
| 1226 | #endif |
| 1227 | return 0; |
| 1228 | } |
| 1229 | } |
| 1230 | return -1; |
| 1231 | } |
| 1232 | |
| 1233 | void bdrv_guess_geometry(BlockDriverState *bs, int *pcyls, int *pheads, int *psecs) |
| 1234 | { |
| 1235 | int translation, lba_detected = 0; |
| 1236 | int cylinders, heads, secs; |
blueswir1 | a38131b | 2008-12-05 17:56:40 +0000 | [diff] [blame] | 1237 | uint64_t nb_sectors; |
aliguori | f3d54fc | 2008-11-25 21:50:24 +0000 | [diff] [blame] | 1238 | |
| 1239 | /* if a geometry hint is available, use it */ |
| 1240 | bdrv_get_geometry(bs, &nb_sectors); |
| 1241 | bdrv_get_geometry_hint(bs, &cylinders, &heads, &secs); |
| 1242 | translation = bdrv_get_translation_hint(bs); |
| 1243 | if (cylinders != 0) { |
| 1244 | *pcyls = cylinders; |
| 1245 | *pheads = heads; |
| 1246 | *psecs = secs; |
| 1247 | } else { |
| 1248 | if (guess_disk_lchs(bs, &cylinders, &heads, &secs) == 0) { |
| 1249 | if (heads > 16) { |
| 1250 | /* if heads > 16, it means that a BIOS LBA |
| 1251 | translation was active, so the default |
| 1252 | hardware geometry is OK */ |
| 1253 | lba_detected = 1; |
| 1254 | goto default_geometry; |
| 1255 | } else { |
| 1256 | *pcyls = cylinders; |
| 1257 | *pheads = heads; |
| 1258 | *psecs = secs; |
| 1259 | /* disable any translation to be in sync with |
| 1260 | the logical geometry */ |
| 1261 | if (translation == BIOS_ATA_TRANSLATION_AUTO) { |
| 1262 | bdrv_set_translation_hint(bs, |
| 1263 | BIOS_ATA_TRANSLATION_NONE); |
| 1264 | } |
| 1265 | } |
| 1266 | } else { |
| 1267 | default_geometry: |
| 1268 | /* if no geometry, use a standard physical disk geometry */ |
| 1269 | cylinders = nb_sectors / (16 * 63); |
| 1270 | |
| 1271 | if (cylinders > 16383) |
| 1272 | cylinders = 16383; |
| 1273 | else if (cylinders < 2) |
| 1274 | cylinders = 2; |
| 1275 | *pcyls = cylinders; |
| 1276 | *pheads = 16; |
| 1277 | *psecs = 63; |
| 1278 | if ((lba_detected == 1) && (translation == BIOS_ATA_TRANSLATION_AUTO)) { |
| 1279 | if ((*pcyls * *pheads) <= 131072) { |
| 1280 | bdrv_set_translation_hint(bs, |
| 1281 | BIOS_ATA_TRANSLATION_LARGE); |
| 1282 | } else { |
| 1283 | bdrv_set_translation_hint(bs, |
| 1284 | BIOS_ATA_TRANSLATION_LBA); |
| 1285 | } |
| 1286 | } |
| 1287 | } |
| 1288 | bdrv_set_geometry_hint(bs, *pcyls, *pheads, *psecs); |
| 1289 | } |
| 1290 | } |
| 1291 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1292 | void bdrv_set_geometry_hint(BlockDriverState *bs, |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1293 | int cyls, int heads, int secs) |
| 1294 | { |
| 1295 | bs->cyls = cyls; |
| 1296 | bs->heads = heads; |
| 1297 | bs->secs = secs; |
| 1298 | } |
| 1299 | |
| 1300 | void bdrv_set_type_hint(BlockDriverState *bs, int type) |
| 1301 | { |
| 1302 | bs->type = type; |
| 1303 | bs->removable = ((type == BDRV_TYPE_CDROM || |
| 1304 | type == BDRV_TYPE_FLOPPY)); |
| 1305 | } |
| 1306 | |
bellard | 46d4767 | 2004-11-16 01:45:27 +0000 | [diff] [blame] | 1307 | void bdrv_set_translation_hint(BlockDriverState *bs, int translation) |
| 1308 | { |
| 1309 | bs->translation = translation; |
| 1310 | } |
| 1311 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1312 | void bdrv_get_geometry_hint(BlockDriverState *bs, |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1313 | int *pcyls, int *pheads, int *psecs) |
| 1314 | { |
| 1315 | *pcyls = bs->cyls; |
| 1316 | *pheads = bs->heads; |
| 1317 | *psecs = bs->secs; |
| 1318 | } |
| 1319 | |
| 1320 | int bdrv_get_type_hint(BlockDriverState *bs) |
| 1321 | { |
| 1322 | return bs->type; |
| 1323 | } |
| 1324 | |
bellard | 46d4767 | 2004-11-16 01:45:27 +0000 | [diff] [blame] | 1325 | int bdrv_get_translation_hint(BlockDriverState *bs) |
| 1326 | { |
| 1327 | return bs->translation; |
| 1328 | } |
| 1329 | |
Markus Armbruster | abd7f68 | 2010-06-02 18:55:17 +0200 | [diff] [blame] | 1330 | void bdrv_set_on_error(BlockDriverState *bs, BlockErrorAction on_read_error, |
| 1331 | BlockErrorAction on_write_error) |
| 1332 | { |
| 1333 | bs->on_read_error = on_read_error; |
| 1334 | bs->on_write_error = on_write_error; |
| 1335 | } |
| 1336 | |
| 1337 | BlockErrorAction bdrv_get_on_error(BlockDriverState *bs, int is_read) |
| 1338 | { |
| 1339 | return is_read ? bs->on_read_error : bs->on_write_error; |
| 1340 | } |
| 1341 | |
Markus Armbruster | 7d0d695 | 2010-06-25 13:42:14 +0200 | [diff] [blame] | 1342 | void bdrv_set_removable(BlockDriverState *bs, int removable) |
| 1343 | { |
| 1344 | bs->removable = removable; |
| 1345 | if (removable && bs == bs_snapshots) { |
| 1346 | bs_snapshots = NULL; |
| 1347 | } |
| 1348 | } |
| 1349 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1350 | int bdrv_is_removable(BlockDriverState *bs) |
| 1351 | { |
| 1352 | return bs->removable; |
| 1353 | } |
| 1354 | |
| 1355 | int bdrv_is_read_only(BlockDriverState *bs) |
| 1356 | { |
| 1357 | return bs->read_only; |
| 1358 | } |
| 1359 | |
ths | 985a03b | 2007-12-24 16:10:43 +0000 | [diff] [blame] | 1360 | int bdrv_is_sg(BlockDriverState *bs) |
| 1361 | { |
| 1362 | return bs->sg; |
| 1363 | } |
| 1364 | |
Christoph Hellwig | e900a7b | 2009-09-04 19:01:15 +0200 | [diff] [blame] | 1365 | int bdrv_enable_write_cache(BlockDriverState *bs) |
| 1366 | { |
| 1367 | return bs->enable_write_cache; |
| 1368 | } |
| 1369 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1370 | /* XXX: no longer used */ |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1371 | void bdrv_set_change_cb(BlockDriverState *bs, |
Christoph Hellwig | db97ee6 | 2011-01-24 13:32:41 +0100 | [diff] [blame] | 1372 | void (*change_cb)(void *opaque, int reason), |
| 1373 | void *opaque) |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1374 | { |
| 1375 | bs->change_cb = change_cb; |
| 1376 | bs->change_opaque = opaque; |
| 1377 | } |
| 1378 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1379 | int bdrv_is_encrypted(BlockDriverState *bs) |
| 1380 | { |
| 1381 | if (bs->backing_hd && bs->backing_hd->encrypted) |
| 1382 | return 1; |
| 1383 | return bs->encrypted; |
| 1384 | } |
| 1385 | |
aliguori | c0f4ce7 | 2009-03-05 23:01:01 +0000 | [diff] [blame] | 1386 | int bdrv_key_required(BlockDriverState *bs) |
| 1387 | { |
| 1388 | BlockDriverState *backing_hd = bs->backing_hd; |
| 1389 | |
| 1390 | if (backing_hd && backing_hd->encrypted && !backing_hd->valid_key) |
| 1391 | return 1; |
| 1392 | return (bs->encrypted && !bs->valid_key); |
| 1393 | } |
| 1394 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1395 | int bdrv_set_key(BlockDriverState *bs, const char *key) |
| 1396 | { |
| 1397 | int ret; |
| 1398 | if (bs->backing_hd && bs->backing_hd->encrypted) { |
| 1399 | ret = bdrv_set_key(bs->backing_hd, key); |
| 1400 | if (ret < 0) |
| 1401 | return ret; |
| 1402 | if (!bs->encrypted) |
| 1403 | return 0; |
| 1404 | } |
Shahar Havivi | fd04a2a | 2010-03-06 00:26:13 +0200 | [diff] [blame] | 1405 | if (!bs->encrypted) { |
| 1406 | return -EINVAL; |
| 1407 | } else if (!bs->drv || !bs->drv->bdrv_set_key) { |
| 1408 | return -ENOMEDIUM; |
| 1409 | } |
aliguori | c0f4ce7 | 2009-03-05 23:01:01 +0000 | [diff] [blame] | 1410 | ret = bs->drv->bdrv_set_key(bs, key); |
aliguori | bb5fc20 | 2009-03-05 23:01:15 +0000 | [diff] [blame] | 1411 | if (ret < 0) { |
| 1412 | bs->valid_key = 0; |
| 1413 | } else if (!bs->valid_key) { |
| 1414 | bs->valid_key = 1; |
| 1415 | /* call the change callback now, we skipped it on open */ |
| 1416 | bs->media_changed = 1; |
| 1417 | if (bs->change_cb) |
Christoph Hellwig | db97ee6 | 2011-01-24 13:32:41 +0100 | [diff] [blame] | 1418 | bs->change_cb(bs->change_opaque, CHANGE_MEDIA); |
aliguori | bb5fc20 | 2009-03-05 23:01:15 +0000 | [diff] [blame] | 1419 | } |
aliguori | c0f4ce7 | 2009-03-05 23:01:01 +0000 | [diff] [blame] | 1420 | return ret; |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1421 | } |
| 1422 | |
| 1423 | void bdrv_get_format(BlockDriverState *bs, char *buf, int buf_size) |
| 1424 | { |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1425 | if (!bs->drv) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1426 | buf[0] = '\0'; |
| 1427 | } else { |
| 1428 | pstrcpy(buf, buf_size, bs->drv->format_name); |
| 1429 | } |
| 1430 | } |
| 1431 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1432 | void bdrv_iterate_format(void (*it)(void *opaque, const char *name), |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1433 | void *opaque) |
| 1434 | { |
| 1435 | BlockDriver *drv; |
| 1436 | |
Stefan Hajnoczi | 8a22f02 | 2010-04-13 10:29:33 +0100 | [diff] [blame] | 1437 | QLIST_FOREACH(drv, &bdrv_drivers, list) { |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1438 | it(opaque, drv->format_name); |
| 1439 | } |
| 1440 | } |
| 1441 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1442 | BlockDriverState *bdrv_find(const char *name) |
| 1443 | { |
| 1444 | BlockDriverState *bs; |
| 1445 | |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 1446 | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
| 1447 | if (!strcmp(name, bs->device_name)) { |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1448 | return bs; |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 1449 | } |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1450 | } |
| 1451 | return NULL; |
| 1452 | } |
| 1453 | |
Markus Armbruster | 2f399b0 | 2010-06-02 18:55:20 +0200 | [diff] [blame] | 1454 | BlockDriverState *bdrv_next(BlockDriverState *bs) |
| 1455 | { |
| 1456 | if (!bs) { |
| 1457 | return QTAILQ_FIRST(&bdrv_states); |
| 1458 | } |
| 1459 | return QTAILQ_NEXT(bs, list); |
| 1460 | } |
| 1461 | |
aliguori | 51de976 | 2009-03-05 23:00:43 +0000 | [diff] [blame] | 1462 | void bdrv_iterate(void (*it)(void *opaque, BlockDriverState *bs), void *opaque) |
bellard | 81d0912 | 2004-07-14 17:21:37 +0000 | [diff] [blame] | 1463 | { |
| 1464 | BlockDriverState *bs; |
| 1465 | |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 1466 | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
aliguori | 51de976 | 2009-03-05 23:00:43 +0000 | [diff] [blame] | 1467 | it(opaque, bs); |
bellard | 81d0912 | 2004-07-14 17:21:37 +0000 | [diff] [blame] | 1468 | } |
| 1469 | } |
| 1470 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1471 | const char *bdrv_get_device_name(BlockDriverState *bs) |
| 1472 | { |
| 1473 | return bs->device_name; |
| 1474 | } |
| 1475 | |
Kevin Wolf | 205ef79 | 2010-10-21 16:43:43 +0200 | [diff] [blame] | 1476 | int bdrv_flush(BlockDriverState *bs) |
pbrook | 7a6cba6 | 2006-06-04 11:39:07 +0000 | [diff] [blame] | 1477 | { |
Alexander Graf | 016f5cf | 2010-05-26 17:51:49 +0200 | [diff] [blame] | 1478 | if (bs->open_flags & BDRV_O_NO_FLUSH) { |
Kevin Wolf | 205ef79 | 2010-10-21 16:43:43 +0200 | [diff] [blame] | 1479 | return 0; |
Alexander Graf | 016f5cf | 2010-05-26 17:51:49 +0200 | [diff] [blame] | 1480 | } |
| 1481 | |
Kevin Wolf | 205ef79 | 2010-10-21 16:43:43 +0200 | [diff] [blame] | 1482 | if (bs->drv && bs->drv->bdrv_flush) { |
| 1483 | return bs->drv->bdrv_flush(bs); |
| 1484 | } |
| 1485 | |
| 1486 | /* |
| 1487 | * Some block drivers always operate in either writethrough or unsafe mode |
| 1488 | * and don't support bdrv_flush therefore. Usually qemu doesn't know how |
| 1489 | * the server works (because the behaviour is hardcoded or depends on |
| 1490 | * server-side configuration), so we can't ensure that everything is safe |
| 1491 | * on disk. Returning an error doesn't work because that would break guests |
| 1492 | * even if the server operates in writethrough mode. |
| 1493 | * |
| 1494 | * Let's hope the user knows what he's doing. |
| 1495 | */ |
| 1496 | return 0; |
pbrook | 7a6cba6 | 2006-06-04 11:39:07 +0000 | [diff] [blame] | 1497 | } |
| 1498 | |
aliguori | c6ca28d | 2008-10-06 13:55:43 +0000 | [diff] [blame] | 1499 | void bdrv_flush_all(void) |
| 1500 | { |
| 1501 | BlockDriverState *bs; |
| 1502 | |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 1503 | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
| 1504 | if (bs->drv && !bdrv_is_read_only(bs) && |
| 1505 | (!bdrv_is_removable(bs) || bdrv_is_inserted(bs))) { |
aliguori | c6ca28d | 2008-10-06 13:55:43 +0000 | [diff] [blame] | 1506 | bdrv_flush(bs); |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 1507 | } |
| 1508 | } |
aliguori | c6ca28d | 2008-10-06 13:55:43 +0000 | [diff] [blame] | 1509 | } |
| 1510 | |
Kevin Wolf | f2feebb | 2010-04-14 17:30:35 +0200 | [diff] [blame] | 1511 | int bdrv_has_zero_init(BlockDriverState *bs) |
| 1512 | { |
| 1513 | assert(bs->drv); |
| 1514 | |
Kevin Wolf | 336c1c1 | 2010-07-28 11:26:29 +0200 | [diff] [blame] | 1515 | if (bs->drv->bdrv_has_zero_init) { |
| 1516 | return bs->drv->bdrv_has_zero_init(bs); |
Kevin Wolf | f2feebb | 2010-04-14 17:30:35 +0200 | [diff] [blame] | 1517 | } |
| 1518 | |
| 1519 | return 1; |
| 1520 | } |
| 1521 | |
Christoph Hellwig | bb8bf76 | 2010-12-16 19:36:31 +0100 | [diff] [blame] | 1522 | int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors) |
| 1523 | { |
| 1524 | if (!bs->drv) { |
| 1525 | return -ENOMEDIUM; |
| 1526 | } |
| 1527 | if (!bs->drv->bdrv_discard) { |
| 1528 | return 0; |
| 1529 | } |
| 1530 | return bs->drv->bdrv_discard(bs, sector_num, nb_sectors); |
| 1531 | } |
| 1532 | |
ths | f58c7b3 | 2008-06-05 21:53:49 +0000 | [diff] [blame] | 1533 | /* |
| 1534 | * Returns true iff the specified sector is present in the disk image. Drivers |
| 1535 | * not implementing the functionality are assumed to not support backing files, |
| 1536 | * hence all their sectors are reported as allocated. |
| 1537 | * |
| 1538 | * 'pnum' is set to the number of sectors (including and immediately following |
| 1539 | * the specified sector) that are known to be in the same |
| 1540 | * allocated/unallocated state. |
| 1541 | * |
| 1542 | * 'nb_sectors' is the max value 'pnum' should be set to. |
| 1543 | */ |
| 1544 | int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, |
| 1545 | int *pnum) |
| 1546 | { |
| 1547 | int64_t n; |
| 1548 | if (!bs->drv->bdrv_is_allocated) { |
| 1549 | if (sector_num >= bs->total_sectors) { |
| 1550 | *pnum = 0; |
| 1551 | return 0; |
| 1552 | } |
| 1553 | n = bs->total_sectors - sector_num; |
| 1554 | *pnum = (n < nb_sectors) ? (n) : (nb_sectors); |
| 1555 | return 1; |
| 1556 | } |
| 1557 | return bs->drv->bdrv_is_allocated(bs, sector_num, nb_sectors, pnum); |
| 1558 | } |
| 1559 | |
Luiz Capitulino | 2582bfe | 2010-02-03 12:41:01 -0200 | [diff] [blame] | 1560 | void bdrv_mon_event(const BlockDriverState *bdrv, |
| 1561 | BlockMonEventAction action, int is_read) |
| 1562 | { |
| 1563 | QObject *data; |
| 1564 | const char *action_str; |
| 1565 | |
| 1566 | switch (action) { |
| 1567 | case BDRV_ACTION_REPORT: |
| 1568 | action_str = "report"; |
| 1569 | break; |
| 1570 | case BDRV_ACTION_IGNORE: |
| 1571 | action_str = "ignore"; |
| 1572 | break; |
| 1573 | case BDRV_ACTION_STOP: |
| 1574 | action_str = "stop"; |
| 1575 | break; |
| 1576 | default: |
| 1577 | abort(); |
| 1578 | } |
| 1579 | |
| 1580 | data = qobject_from_jsonf("{ 'device': %s, 'action': %s, 'operation': %s }", |
| 1581 | bdrv->device_name, |
| 1582 | action_str, |
| 1583 | is_read ? "read" : "write"); |
| 1584 | monitor_protocol_event(QEVENT_BLOCK_IO_ERROR, data); |
| 1585 | |
| 1586 | qobject_decref(data); |
| 1587 | } |
| 1588 | |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1589 | static void bdrv_print_dict(QObject *obj, void *opaque) |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1590 | { |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1591 | QDict *bs_dict; |
| 1592 | Monitor *mon = opaque; |
| 1593 | |
| 1594 | bs_dict = qobject_to_qdict(obj); |
| 1595 | |
| 1596 | monitor_printf(mon, "%s: type=%s removable=%d", |
| 1597 | qdict_get_str(bs_dict, "device"), |
| 1598 | qdict_get_str(bs_dict, "type"), |
| 1599 | qdict_get_bool(bs_dict, "removable")); |
| 1600 | |
| 1601 | if (qdict_get_bool(bs_dict, "removable")) { |
| 1602 | monitor_printf(mon, " locked=%d", qdict_get_bool(bs_dict, "locked")); |
| 1603 | } |
| 1604 | |
| 1605 | if (qdict_haskey(bs_dict, "inserted")) { |
| 1606 | QDict *qdict = qobject_to_qdict(qdict_get(bs_dict, "inserted")); |
| 1607 | |
| 1608 | monitor_printf(mon, " file="); |
| 1609 | monitor_print_filename(mon, qdict_get_str(qdict, "file")); |
| 1610 | if (qdict_haskey(qdict, "backing_file")) { |
| 1611 | monitor_printf(mon, " backing_file="); |
| 1612 | monitor_print_filename(mon, qdict_get_str(qdict, "backing_file")); |
| 1613 | } |
| 1614 | monitor_printf(mon, " ro=%d drv=%s encrypted=%d", |
| 1615 | qdict_get_bool(qdict, "ro"), |
| 1616 | qdict_get_str(qdict, "drv"), |
| 1617 | qdict_get_bool(qdict, "encrypted")); |
| 1618 | } else { |
| 1619 | monitor_printf(mon, " [not inserted]"); |
| 1620 | } |
| 1621 | |
| 1622 | monitor_printf(mon, "\n"); |
| 1623 | } |
| 1624 | |
| 1625 | void bdrv_info_print(Monitor *mon, const QObject *data) |
| 1626 | { |
| 1627 | qlist_iter(qobject_to_qlist(data), bdrv_print_dict, mon); |
| 1628 | } |
| 1629 | |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1630 | void bdrv_info(Monitor *mon, QObject **ret_data) |
| 1631 | { |
| 1632 | QList *bs_list; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1633 | BlockDriverState *bs; |
| 1634 | |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1635 | bs_list = qlist_new(); |
| 1636 | |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 1637 | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1638 | QObject *bs_obj; |
| 1639 | const char *type = "unknown"; |
| 1640 | |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1641 | switch(bs->type) { |
| 1642 | case BDRV_TYPE_HD: |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1643 | type = "hd"; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1644 | break; |
| 1645 | case BDRV_TYPE_CDROM: |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1646 | type = "cdrom"; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1647 | break; |
| 1648 | case BDRV_TYPE_FLOPPY: |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1649 | type = "floppy"; |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1650 | break; |
| 1651 | } |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1652 | |
| 1653 | bs_obj = qobject_from_jsonf("{ 'device': %s, 'type': %s, " |
| 1654 | "'removable': %i, 'locked': %i }", |
| 1655 | bs->device_name, type, bs->removable, |
| 1656 | bs->locked); |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1657 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1658 | if (bs->drv) { |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1659 | QObject *obj; |
| 1660 | QDict *bs_dict = qobject_to_qdict(bs_obj); |
| 1661 | |
| 1662 | obj = qobject_from_jsonf("{ 'file': %s, 'ro': %i, 'drv': %s, " |
| 1663 | "'encrypted': %i }", |
| 1664 | bs->filename, bs->read_only, |
| 1665 | bs->drv->format_name, |
| 1666 | bdrv_is_encrypted(bs)); |
ths | fef3074 | 2006-12-22 14:11:32 +0000 | [diff] [blame] | 1667 | if (bs->backing_file[0] != '\0') { |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1668 | QDict *qdict = qobject_to_qdict(obj); |
| 1669 | qdict_put(qdict, "backing_file", |
| 1670 | qstring_from_str(bs->backing_file)); |
aliguori | 376253e | 2009-03-05 23:01:23 +0000 | [diff] [blame] | 1671 | } |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1672 | |
| 1673 | qdict_put_obj(bs_dict, "inserted", obj); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1674 | } |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1675 | qlist_append_obj(bs_list, bs_obj); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1676 | } |
Luiz Capitulino | d15e546 | 2009-12-10 17:16:06 -0200 | [diff] [blame] | 1677 | |
| 1678 | *ret_data = QOBJECT(bs_list); |
bellard | b338082 | 2004-03-14 21:38:54 +0000 | [diff] [blame] | 1679 | } |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1680 | |
Luiz Capitulino | 218a536 | 2009-12-10 17:16:07 -0200 | [diff] [blame] | 1681 | static void bdrv_stats_iter(QObject *data, void *opaque) |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1682 | { |
Luiz Capitulino | 218a536 | 2009-12-10 17:16:07 -0200 | [diff] [blame] | 1683 | QDict *qdict; |
| 1684 | Monitor *mon = opaque; |
| 1685 | |
| 1686 | qdict = qobject_to_qdict(data); |
| 1687 | monitor_printf(mon, "%s:", qdict_get_str(qdict, "device")); |
| 1688 | |
| 1689 | qdict = qobject_to_qdict(qdict_get(qdict, "stats")); |
| 1690 | monitor_printf(mon, " rd_bytes=%" PRId64 |
| 1691 | " wr_bytes=%" PRId64 |
| 1692 | " rd_operations=%" PRId64 |
| 1693 | " wr_operations=%" PRId64 |
| 1694 | "\n", |
| 1695 | qdict_get_int(qdict, "rd_bytes"), |
| 1696 | qdict_get_int(qdict, "wr_bytes"), |
| 1697 | qdict_get_int(qdict, "rd_operations"), |
| 1698 | qdict_get_int(qdict, "wr_operations")); |
| 1699 | } |
| 1700 | |
| 1701 | void bdrv_stats_print(Monitor *mon, const QObject *data) |
| 1702 | { |
| 1703 | qlist_iter(qobject_to_qlist(data), bdrv_stats_iter, mon); |
| 1704 | } |
| 1705 | |
Kevin Wolf | 294cc35 | 2010-04-28 14:34:01 +0200 | [diff] [blame] | 1706 | static QObject* bdrv_info_stats_bs(BlockDriverState *bs) |
| 1707 | { |
| 1708 | QObject *res; |
| 1709 | QDict *dict; |
| 1710 | |
| 1711 | res = qobject_from_jsonf("{ 'stats': {" |
| 1712 | "'rd_bytes': %" PRId64 "," |
| 1713 | "'wr_bytes': %" PRId64 "," |
| 1714 | "'rd_operations': %" PRId64 "," |
| 1715 | "'wr_operations': %" PRId64 "," |
| 1716 | "'wr_highest_offset': %" PRId64 |
| 1717 | "} }", |
| 1718 | bs->rd_bytes, bs->wr_bytes, |
| 1719 | bs->rd_ops, bs->wr_ops, |
Blue Swirl | 5ffbbc6 | 2010-06-14 18:55:33 +0000 | [diff] [blame] | 1720 | bs->wr_highest_sector * |
| 1721 | (uint64_t)BDRV_SECTOR_SIZE); |
Kevin Wolf | 294cc35 | 2010-04-28 14:34:01 +0200 | [diff] [blame] | 1722 | dict = qobject_to_qdict(res); |
| 1723 | |
| 1724 | if (*bs->device_name) { |
| 1725 | qdict_put(dict, "device", qstring_from_str(bs->device_name)); |
| 1726 | } |
| 1727 | |
| 1728 | if (bs->file) { |
| 1729 | QObject *parent = bdrv_info_stats_bs(bs->file); |
| 1730 | qdict_put_obj(dict, "parent", parent); |
| 1731 | } |
| 1732 | |
| 1733 | return res; |
| 1734 | } |
| 1735 | |
Luiz Capitulino | 218a536 | 2009-12-10 17:16:07 -0200 | [diff] [blame] | 1736 | void bdrv_info_stats(Monitor *mon, QObject **ret_data) |
| 1737 | { |
| 1738 | QObject *obj; |
| 1739 | QList *devices; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1740 | BlockDriverState *bs; |
| 1741 | |
Luiz Capitulino | 218a536 | 2009-12-10 17:16:07 -0200 | [diff] [blame] | 1742 | devices = qlist_new(); |
| 1743 | |
Stefan Hajnoczi | 1b7bdbc | 2010-04-10 07:02:42 +0100 | [diff] [blame] | 1744 | QTAILQ_FOREACH(bs, &bdrv_states, list) { |
Kevin Wolf | 294cc35 | 2010-04-28 14:34:01 +0200 | [diff] [blame] | 1745 | obj = bdrv_info_stats_bs(bs); |
Luiz Capitulino | 218a536 | 2009-12-10 17:16:07 -0200 | [diff] [blame] | 1746 | qlist_append_obj(devices, obj); |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1747 | } |
Luiz Capitulino | 218a536 | 2009-12-10 17:16:07 -0200 | [diff] [blame] | 1748 | |
| 1749 | *ret_data = QOBJECT(devices); |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 1750 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1751 | |
aliguori | 045df33 | 2009-03-05 23:00:48 +0000 | [diff] [blame] | 1752 | const char *bdrv_get_encrypted_filename(BlockDriverState *bs) |
| 1753 | { |
| 1754 | if (bs->backing_hd && bs->backing_hd->encrypted) |
| 1755 | return bs->backing_file; |
| 1756 | else if (bs->encrypted) |
| 1757 | return bs->filename; |
| 1758 | else |
| 1759 | return NULL; |
| 1760 | } |
| 1761 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1762 | void bdrv_get_backing_filename(BlockDriverState *bs, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1763 | char *filename, int filename_size) |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1764 | { |
Kevin Wolf | b783e40 | 2010-01-12 12:55:16 +0100 | [diff] [blame] | 1765 | if (!bs->backing_file) { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 1766 | pstrcpy(filename, filename_size, ""); |
| 1767 | } else { |
| 1768 | pstrcpy(filename, filename_size, bs->backing_file); |
| 1769 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 1770 | } |
| 1771 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1772 | int bdrv_write_compressed(BlockDriverState *bs, int64_t sector_num, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1773 | const uint8_t *buf, int nb_sectors) |
| 1774 | { |
| 1775 | BlockDriver *drv = bs->drv; |
| 1776 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1777 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1778 | if (!drv->bdrv_write_compressed) |
| 1779 | return -ENOTSUP; |
Kevin Wolf | fbb7b4e | 2009-05-08 14:47:24 +0200 | [diff] [blame] | 1780 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
| 1781 | return -EIO; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1782 | |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 1783 | if (bs->dirty_bitmap) { |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 1784 | set_dirty_bitmap(bs, sector_num, nb_sectors, 1); |
| 1785 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 1786 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1787 | return drv->bdrv_write_compressed(bs, sector_num, buf, nb_sectors); |
| 1788 | } |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 1789 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1790 | int bdrv_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
| 1791 | { |
| 1792 | BlockDriver *drv = bs->drv; |
| 1793 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1794 | return -ENOMEDIUM; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1795 | if (!drv->bdrv_get_info) |
| 1796 | return -ENOTSUP; |
| 1797 | memset(bdi, 0, sizeof(*bdi)); |
| 1798 | return drv->bdrv_get_info(bs, bdi); |
| 1799 | } |
| 1800 | |
Christoph Hellwig | 45566e9 | 2009-07-10 23:11:57 +0200 | [diff] [blame] | 1801 | int bdrv_save_vmstate(BlockDriverState *bs, const uint8_t *buf, |
| 1802 | int64_t pos, int size) |
aliguori | 178e08a | 2009-04-05 19:10:55 +0000 | [diff] [blame] | 1803 | { |
| 1804 | BlockDriver *drv = bs->drv; |
| 1805 | if (!drv) |
| 1806 | return -ENOMEDIUM; |
MORITA Kazutaka | 7cdb1f6 | 2010-05-28 11:44:58 +0900 | [diff] [blame] | 1807 | if (drv->bdrv_save_vmstate) |
| 1808 | return drv->bdrv_save_vmstate(bs, buf, pos, size); |
| 1809 | if (bs->file) |
| 1810 | return bdrv_save_vmstate(bs->file, buf, pos, size); |
| 1811 | return -ENOTSUP; |
aliguori | 178e08a | 2009-04-05 19:10:55 +0000 | [diff] [blame] | 1812 | } |
| 1813 | |
Christoph Hellwig | 45566e9 | 2009-07-10 23:11:57 +0200 | [diff] [blame] | 1814 | int bdrv_load_vmstate(BlockDriverState *bs, uint8_t *buf, |
| 1815 | int64_t pos, int size) |
aliguori | 178e08a | 2009-04-05 19:10:55 +0000 | [diff] [blame] | 1816 | { |
| 1817 | BlockDriver *drv = bs->drv; |
| 1818 | if (!drv) |
| 1819 | return -ENOMEDIUM; |
MORITA Kazutaka | 7cdb1f6 | 2010-05-28 11:44:58 +0900 | [diff] [blame] | 1820 | if (drv->bdrv_load_vmstate) |
| 1821 | return drv->bdrv_load_vmstate(bs, buf, pos, size); |
| 1822 | if (bs->file) |
| 1823 | return bdrv_load_vmstate(bs->file, buf, pos, size); |
| 1824 | return -ENOTSUP; |
aliguori | 178e08a | 2009-04-05 19:10:55 +0000 | [diff] [blame] | 1825 | } |
| 1826 | |
Kevin Wolf | 8b9b0cc | 2010-03-15 17:27:00 +0100 | [diff] [blame] | 1827 | void bdrv_debug_event(BlockDriverState *bs, BlkDebugEvent event) |
| 1828 | { |
| 1829 | BlockDriver *drv = bs->drv; |
| 1830 | |
| 1831 | if (!drv || !drv->bdrv_debug_event) { |
| 1832 | return; |
| 1833 | } |
| 1834 | |
| 1835 | return drv->bdrv_debug_event(bs, event); |
| 1836 | |
| 1837 | } |
| 1838 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1839 | /**************************************************************/ |
| 1840 | /* handling of snapshots */ |
| 1841 | |
Miguel Di Ciurcio Filho | feeee5a | 2010-06-08 10:40:55 -0300 | [diff] [blame] | 1842 | int bdrv_can_snapshot(BlockDriverState *bs) |
| 1843 | { |
| 1844 | BlockDriver *drv = bs->drv; |
| 1845 | if (!drv || bdrv_is_removable(bs) || bdrv_is_read_only(bs)) { |
| 1846 | return 0; |
| 1847 | } |
| 1848 | |
| 1849 | if (!drv->bdrv_snapshot_create) { |
| 1850 | if (bs->file != NULL) { |
| 1851 | return bdrv_can_snapshot(bs->file); |
| 1852 | } |
| 1853 | return 0; |
| 1854 | } |
| 1855 | |
| 1856 | return 1; |
| 1857 | } |
| 1858 | |
Blue Swirl | 199630b | 2010-07-25 20:49:34 +0000 | [diff] [blame] | 1859 | int bdrv_is_snapshot(BlockDriverState *bs) |
| 1860 | { |
| 1861 | return !!(bs->open_flags & BDRV_O_SNAPSHOT); |
| 1862 | } |
| 1863 | |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 1864 | BlockDriverState *bdrv_snapshots(void) |
| 1865 | { |
| 1866 | BlockDriverState *bs; |
| 1867 | |
Markus Armbruster | 3ac906f | 2010-07-01 09:30:38 +0200 | [diff] [blame] | 1868 | if (bs_snapshots) { |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 1869 | return bs_snapshots; |
Markus Armbruster | 3ac906f | 2010-07-01 09:30:38 +0200 | [diff] [blame] | 1870 | } |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 1871 | |
| 1872 | bs = NULL; |
| 1873 | while ((bs = bdrv_next(bs))) { |
| 1874 | if (bdrv_can_snapshot(bs)) { |
Markus Armbruster | 3ac906f | 2010-07-01 09:30:38 +0200 | [diff] [blame] | 1875 | bs_snapshots = bs; |
| 1876 | return bs; |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 1877 | } |
| 1878 | } |
| 1879 | return NULL; |
Markus Armbruster | f9092b1 | 2010-06-25 10:33:39 +0200 | [diff] [blame] | 1880 | } |
| 1881 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1882 | int bdrv_snapshot_create(BlockDriverState *bs, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1883 | QEMUSnapshotInfo *sn_info) |
| 1884 | { |
| 1885 | BlockDriver *drv = bs->drv; |
| 1886 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1887 | return -ENOMEDIUM; |
MORITA Kazutaka | 7cdb1f6 | 2010-05-28 11:44:58 +0900 | [diff] [blame] | 1888 | if (drv->bdrv_snapshot_create) |
| 1889 | return drv->bdrv_snapshot_create(bs, sn_info); |
| 1890 | if (bs->file) |
| 1891 | return bdrv_snapshot_create(bs->file, sn_info); |
| 1892 | return -ENOTSUP; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1893 | } |
| 1894 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1895 | int bdrv_snapshot_goto(BlockDriverState *bs, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1896 | const char *snapshot_id) |
| 1897 | { |
| 1898 | BlockDriver *drv = bs->drv; |
MORITA Kazutaka | 7cdb1f6 | 2010-05-28 11:44:58 +0900 | [diff] [blame] | 1899 | int ret, open_ret; |
| 1900 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1901 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1902 | return -ENOMEDIUM; |
MORITA Kazutaka | 7cdb1f6 | 2010-05-28 11:44:58 +0900 | [diff] [blame] | 1903 | if (drv->bdrv_snapshot_goto) |
| 1904 | return drv->bdrv_snapshot_goto(bs, snapshot_id); |
| 1905 | |
| 1906 | if (bs->file) { |
| 1907 | drv->bdrv_close(bs); |
| 1908 | ret = bdrv_snapshot_goto(bs->file, snapshot_id); |
| 1909 | open_ret = drv->bdrv_open(bs, bs->open_flags); |
| 1910 | if (open_ret < 0) { |
| 1911 | bdrv_delete(bs->file); |
| 1912 | bs->drv = NULL; |
| 1913 | return open_ret; |
| 1914 | } |
| 1915 | return ret; |
| 1916 | } |
| 1917 | |
| 1918 | return -ENOTSUP; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1919 | } |
| 1920 | |
| 1921 | int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id) |
| 1922 | { |
| 1923 | BlockDriver *drv = bs->drv; |
| 1924 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1925 | return -ENOMEDIUM; |
MORITA Kazutaka | 7cdb1f6 | 2010-05-28 11:44:58 +0900 | [diff] [blame] | 1926 | if (drv->bdrv_snapshot_delete) |
| 1927 | return drv->bdrv_snapshot_delete(bs, snapshot_id); |
| 1928 | if (bs->file) |
| 1929 | return bdrv_snapshot_delete(bs->file, snapshot_id); |
| 1930 | return -ENOTSUP; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1931 | } |
| 1932 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1933 | int bdrv_snapshot_list(BlockDriverState *bs, |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1934 | QEMUSnapshotInfo **psn_info) |
| 1935 | { |
| 1936 | BlockDriver *drv = bs->drv; |
| 1937 | if (!drv) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 1938 | return -ENOMEDIUM; |
MORITA Kazutaka | 7cdb1f6 | 2010-05-28 11:44:58 +0900 | [diff] [blame] | 1939 | if (drv->bdrv_snapshot_list) |
| 1940 | return drv->bdrv_snapshot_list(bs, psn_info); |
| 1941 | if (bs->file) |
| 1942 | return bdrv_snapshot_list(bs->file, psn_info); |
| 1943 | return -ENOTSUP; |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1944 | } |
| 1945 | |
edison | 51ef672 | 2010-09-21 19:58:41 -0700 | [diff] [blame] | 1946 | int bdrv_snapshot_load_tmp(BlockDriverState *bs, |
| 1947 | const char *snapshot_name) |
| 1948 | { |
| 1949 | BlockDriver *drv = bs->drv; |
| 1950 | if (!drv) { |
| 1951 | return -ENOMEDIUM; |
| 1952 | } |
| 1953 | if (!bs->read_only) { |
| 1954 | return -EINVAL; |
| 1955 | } |
| 1956 | if (drv->bdrv_snapshot_load_tmp) { |
| 1957 | return drv->bdrv_snapshot_load_tmp(bs, snapshot_name); |
| 1958 | } |
| 1959 | return -ENOTSUP; |
| 1960 | } |
| 1961 | |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1962 | #define NB_SUFFIXES 4 |
| 1963 | |
| 1964 | char *get_human_readable_size(char *buf, int buf_size, int64_t size) |
| 1965 | { |
| 1966 | static const char suffixes[NB_SUFFIXES] = "KMGT"; |
| 1967 | int64_t base; |
| 1968 | int i; |
| 1969 | |
| 1970 | if (size <= 999) { |
| 1971 | snprintf(buf, buf_size, "%" PRId64, size); |
| 1972 | } else { |
| 1973 | base = 1024; |
| 1974 | for(i = 0; i < NB_SUFFIXES; i++) { |
| 1975 | if (size < (10 * base)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1976 | snprintf(buf, buf_size, "%0.1f%c", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1977 | (double)size / base, |
| 1978 | suffixes[i]); |
| 1979 | break; |
| 1980 | } else if (size < (1000 * base) || i == (NB_SUFFIXES - 1)) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 1981 | snprintf(buf, buf_size, "%" PRId64 "%c", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1982 | ((size + (base >> 1)) / base), |
| 1983 | suffixes[i]); |
| 1984 | break; |
| 1985 | } |
| 1986 | base = base * 1024; |
| 1987 | } |
| 1988 | } |
| 1989 | return buf; |
| 1990 | } |
| 1991 | |
| 1992 | char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn) |
| 1993 | { |
| 1994 | char buf1[128], date_buf[128], clock_buf[128]; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 1995 | #ifdef _WIN32 |
| 1996 | struct tm *ptm; |
| 1997 | #else |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 1998 | struct tm tm; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 1999 | #endif |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 2000 | time_t ti; |
| 2001 | int64_t secs; |
| 2002 | |
| 2003 | if (!sn) { |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2004 | snprintf(buf, buf_size, |
| 2005 | "%-10s%-20s%7s%20s%15s", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 2006 | "ID", "TAG", "VM SIZE", "DATE", "VM CLOCK"); |
| 2007 | } else { |
| 2008 | ti = sn->date_sec; |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 2009 | #ifdef _WIN32 |
| 2010 | ptm = localtime(&ti); |
| 2011 | strftime(date_buf, sizeof(date_buf), |
| 2012 | "%Y-%m-%d %H:%M:%S", ptm); |
| 2013 | #else |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 2014 | localtime_r(&ti, &tm); |
| 2015 | strftime(date_buf, sizeof(date_buf), |
| 2016 | "%Y-%m-%d %H:%M:%S", &tm); |
bellard | 3b9f94e | 2007-01-07 17:27:07 +0000 | [diff] [blame] | 2017 | #endif |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 2018 | secs = sn->vm_clock_nsec / 1000000000; |
| 2019 | snprintf(clock_buf, sizeof(clock_buf), |
| 2020 | "%02d:%02d:%02d.%03d", |
| 2021 | (int)(secs / 3600), |
| 2022 | (int)((secs / 60) % 60), |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2023 | (int)(secs % 60), |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 2024 | (int)((sn->vm_clock_nsec / 1000000) % 1000)); |
| 2025 | snprintf(buf, buf_size, |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2026 | "%-10s%-20s%7s%20s%15s", |
bellard | faea38e | 2006-08-05 21:31:00 +0000 | [diff] [blame] | 2027 | sn->id_str, sn->name, |
| 2028 | get_human_readable_size(buf1, sizeof(buf1), sn->vm_state_size), |
| 2029 | date_buf, |
| 2030 | clock_buf); |
| 2031 | } |
| 2032 | return buf; |
| 2033 | } |
| 2034 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 2035 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2036 | /**************************************************************/ |
| 2037 | /* async I/Os */ |
| 2038 | |
aliguori | 3b69e4b | 2009-01-22 16:59:24 +0000 | [diff] [blame] | 2039 | BlockDriverAIOCB *bdrv_aio_readv(BlockDriverState *bs, int64_t sector_num, |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2040 | QEMUIOVector *qiov, int nb_sectors, |
aliguori | 3b69e4b | 2009-01-22 16:59:24 +0000 | [diff] [blame] | 2041 | BlockDriverCompletionFunc *cb, void *opaque) |
| 2042 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2043 | BlockDriver *drv = bs->drv; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 2044 | BlockDriverAIOCB *ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2045 | |
Stefan Hajnoczi | bbf0a44 | 2010-10-05 14:28:53 +0100 | [diff] [blame] | 2046 | trace_bdrv_aio_readv(bs, sector_num, nb_sectors, opaque); |
| 2047 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2048 | if (!drv) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2049 | return NULL; |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 2050 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
| 2051 | return NULL; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 2052 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2053 | ret = drv->bdrv_aio_readv(bs, sector_num, qiov, nb_sectors, |
| 2054 | cb, opaque); |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 2055 | |
| 2056 | if (ret) { |
| 2057 | /* Update stats even though technically transfer has not happened. */ |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2058 | bs->rd_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 2059 | bs->rd_ops ++; |
| 2060 | } |
| 2061 | |
| 2062 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2063 | } |
| 2064 | |
Marcelo Tosatti | 4dcafbb | 2010-11-08 17:02:55 -0200 | [diff] [blame] | 2065 | typedef struct BlockCompleteData { |
| 2066 | BlockDriverCompletionFunc *cb; |
| 2067 | void *opaque; |
| 2068 | BlockDriverState *bs; |
| 2069 | int64_t sector_num; |
| 2070 | int nb_sectors; |
| 2071 | } BlockCompleteData; |
| 2072 | |
| 2073 | static void block_complete_cb(void *opaque, int ret) |
| 2074 | { |
| 2075 | BlockCompleteData *b = opaque; |
| 2076 | |
| 2077 | if (b->bs->dirty_bitmap) { |
| 2078 | set_dirty_bitmap(b->bs, b->sector_num, b->nb_sectors, 1); |
| 2079 | } |
| 2080 | b->cb(b->opaque, ret); |
| 2081 | qemu_free(b); |
| 2082 | } |
| 2083 | |
| 2084 | static BlockCompleteData *blk_dirty_cb_alloc(BlockDriverState *bs, |
| 2085 | int64_t sector_num, |
| 2086 | int nb_sectors, |
| 2087 | BlockDriverCompletionFunc *cb, |
| 2088 | void *opaque) |
| 2089 | { |
| 2090 | BlockCompleteData *blkdata = qemu_mallocz(sizeof(BlockCompleteData)); |
| 2091 | |
| 2092 | blkdata->bs = bs; |
| 2093 | blkdata->cb = cb; |
| 2094 | blkdata->opaque = opaque; |
| 2095 | blkdata->sector_num = sector_num; |
| 2096 | blkdata->nb_sectors = nb_sectors; |
| 2097 | |
| 2098 | return blkdata; |
| 2099 | } |
| 2100 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2101 | BlockDriverAIOCB *bdrv_aio_writev(BlockDriverState *bs, int64_t sector_num, |
| 2102 | QEMUIOVector *qiov, int nb_sectors, |
| 2103 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2104 | { |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2105 | BlockDriver *drv = bs->drv; |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 2106 | BlockDriverAIOCB *ret; |
Marcelo Tosatti | 4dcafbb | 2010-11-08 17:02:55 -0200 | [diff] [blame] | 2107 | BlockCompleteData *blk_cb_data; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2108 | |
Stefan Hajnoczi | bbf0a44 | 2010-10-05 14:28:53 +0100 | [diff] [blame] | 2109 | trace_bdrv_aio_writev(bs, sector_num, nb_sectors, opaque); |
| 2110 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2111 | if (!drv) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2112 | return NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2113 | if (bs->read_only) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2114 | return NULL; |
aliguori | 71d0770 | 2009-03-03 17:37:16 +0000 | [diff] [blame] | 2115 | if (bdrv_check_request(bs, sector_num, nb_sectors)) |
| 2116 | return NULL; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2117 | |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 2118 | if (bs->dirty_bitmap) { |
Marcelo Tosatti | 4dcafbb | 2010-11-08 17:02:55 -0200 | [diff] [blame] | 2119 | blk_cb_data = blk_dirty_cb_alloc(bs, sector_num, nb_sectors, cb, |
| 2120 | opaque); |
| 2121 | cb = &block_complete_cb; |
| 2122 | opaque = blk_cb_data; |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2123 | } |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2124 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2125 | ret = drv->bdrv_aio_writev(bs, sector_num, qiov, nb_sectors, |
| 2126 | cb, opaque); |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 2127 | |
| 2128 | if (ret) { |
Kevin Wolf | 294cc35 | 2010-04-28 14:34:01 +0200 | [diff] [blame] | 2129 | /* Update stats even though technically transfer has not happened. */ |
| 2130 | bs->wr_bytes += (unsigned) nb_sectors * BDRV_SECTOR_SIZE; |
| 2131 | bs->wr_ops ++; |
| 2132 | if (bs->wr_highest_sector < sector_num + nb_sectors - 1) { |
| 2133 | bs->wr_highest_sector = sector_num + nb_sectors - 1; |
| 2134 | } |
ths | a36e69d | 2007-12-02 05:18:19 +0000 | [diff] [blame] | 2135 | } |
| 2136 | |
| 2137 | return ret; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2138 | } |
| 2139 | |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2140 | |
| 2141 | typedef struct MultiwriteCB { |
| 2142 | int error; |
| 2143 | int num_requests; |
| 2144 | int num_callbacks; |
| 2145 | struct { |
| 2146 | BlockDriverCompletionFunc *cb; |
| 2147 | void *opaque; |
| 2148 | QEMUIOVector *free_qiov; |
| 2149 | void *free_buf; |
| 2150 | } callbacks[]; |
| 2151 | } MultiwriteCB; |
| 2152 | |
| 2153 | static void multiwrite_user_cb(MultiwriteCB *mcb) |
| 2154 | { |
| 2155 | int i; |
| 2156 | |
| 2157 | for (i = 0; i < mcb->num_callbacks; i++) { |
| 2158 | mcb->callbacks[i].cb(mcb->callbacks[i].opaque, mcb->error); |
Stefan Hajnoczi | 1e1ea48 | 2010-04-21 20:35:45 +0100 | [diff] [blame] | 2159 | if (mcb->callbacks[i].free_qiov) { |
| 2160 | qemu_iovec_destroy(mcb->callbacks[i].free_qiov); |
| 2161 | } |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2162 | qemu_free(mcb->callbacks[i].free_qiov); |
Herve Poussineau | f8a8324 | 2010-01-24 21:23:56 +0000 | [diff] [blame] | 2163 | qemu_vfree(mcb->callbacks[i].free_buf); |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2164 | } |
| 2165 | } |
| 2166 | |
| 2167 | static void multiwrite_cb(void *opaque, int ret) |
| 2168 | { |
| 2169 | MultiwriteCB *mcb = opaque; |
| 2170 | |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 2171 | trace_multiwrite_cb(mcb, ret); |
| 2172 | |
Kevin Wolf | cb6d3ca | 2010-04-01 22:48:44 +0200 | [diff] [blame] | 2173 | if (ret < 0 && !mcb->error) { |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2174 | mcb->error = ret; |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2175 | } |
| 2176 | |
| 2177 | mcb->num_requests--; |
| 2178 | if (mcb->num_requests == 0) { |
Kevin Wolf | de189a1 | 2010-07-01 16:08:51 +0200 | [diff] [blame] | 2179 | multiwrite_user_cb(mcb); |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2180 | qemu_free(mcb); |
| 2181 | } |
| 2182 | } |
| 2183 | |
| 2184 | static int multiwrite_req_compare(const void *a, const void *b) |
| 2185 | { |
Christoph Hellwig | 77be436 | 2010-05-19 20:53:10 +0200 | [diff] [blame] | 2186 | const BlockRequest *req1 = a, *req2 = b; |
| 2187 | |
| 2188 | /* |
| 2189 | * Note that we can't simply subtract req2->sector from req1->sector |
| 2190 | * here as that could overflow the return value. |
| 2191 | */ |
| 2192 | if (req1->sector > req2->sector) { |
| 2193 | return 1; |
| 2194 | } else if (req1->sector < req2->sector) { |
| 2195 | return -1; |
| 2196 | } else { |
| 2197 | return 0; |
| 2198 | } |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2199 | } |
| 2200 | |
| 2201 | /* |
| 2202 | * Takes a bunch of requests and tries to merge them. Returns the number of |
| 2203 | * requests that remain after merging. |
| 2204 | */ |
| 2205 | static int multiwrite_merge(BlockDriverState *bs, BlockRequest *reqs, |
| 2206 | int num_reqs, MultiwriteCB *mcb) |
| 2207 | { |
| 2208 | int i, outidx; |
| 2209 | |
| 2210 | // Sort requests by start sector |
| 2211 | qsort(reqs, num_reqs, sizeof(*reqs), &multiwrite_req_compare); |
| 2212 | |
| 2213 | // Check if adjacent requests touch the same clusters. If so, combine them, |
| 2214 | // filling up gaps with zero sectors. |
| 2215 | outidx = 0; |
| 2216 | for (i = 1; i < num_reqs; i++) { |
| 2217 | int merge = 0; |
| 2218 | int64_t oldreq_last = reqs[outidx].sector + reqs[outidx].nb_sectors; |
| 2219 | |
| 2220 | // This handles the cases that are valid for all block drivers, namely |
| 2221 | // exactly sequential writes and overlapping writes. |
| 2222 | if (reqs[i].sector <= oldreq_last) { |
| 2223 | merge = 1; |
| 2224 | } |
| 2225 | |
| 2226 | // The block driver may decide that it makes sense to combine requests |
| 2227 | // even if there is a gap of some sectors between them. In this case, |
| 2228 | // the gap is filled with zeros (therefore only applicable for yet |
| 2229 | // unused space in format like qcow2). |
| 2230 | if (!merge && bs->drv->bdrv_merge_requests) { |
| 2231 | merge = bs->drv->bdrv_merge_requests(bs, &reqs[outidx], &reqs[i]); |
| 2232 | } |
| 2233 | |
Christoph Hellwig | e2a305f | 2010-01-26 14:49:08 +0100 | [diff] [blame] | 2234 | if (reqs[outidx].qiov->niov + reqs[i].qiov->niov + 1 > IOV_MAX) { |
| 2235 | merge = 0; |
| 2236 | } |
| 2237 | |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2238 | if (merge) { |
| 2239 | size_t size; |
| 2240 | QEMUIOVector *qiov = qemu_mallocz(sizeof(*qiov)); |
| 2241 | qemu_iovec_init(qiov, |
| 2242 | reqs[outidx].qiov->niov + reqs[i].qiov->niov + 1); |
| 2243 | |
| 2244 | // Add the first request to the merged one. If the requests are |
| 2245 | // overlapping, drop the last sectors of the first request. |
| 2246 | size = (reqs[i].sector - reqs[outidx].sector) << 9; |
| 2247 | qemu_iovec_concat(qiov, reqs[outidx].qiov, size); |
| 2248 | |
| 2249 | // We might need to add some zeros between the two requests |
| 2250 | if (reqs[i].sector > oldreq_last) { |
| 2251 | size_t zero_bytes = (reqs[i].sector - oldreq_last) << 9; |
| 2252 | uint8_t *buf = qemu_blockalign(bs, zero_bytes); |
| 2253 | memset(buf, 0, zero_bytes); |
| 2254 | qemu_iovec_add(qiov, buf, zero_bytes); |
| 2255 | mcb->callbacks[i].free_buf = buf; |
| 2256 | } |
| 2257 | |
| 2258 | // Add the second request |
| 2259 | qemu_iovec_concat(qiov, reqs[i].qiov, reqs[i].qiov->size); |
| 2260 | |
Kevin Wolf | cbf1dff | 2010-05-21 11:09:42 +0200 | [diff] [blame] | 2261 | reqs[outidx].nb_sectors = qiov->size >> 9; |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2262 | reqs[outidx].qiov = qiov; |
| 2263 | |
| 2264 | mcb->callbacks[i].free_qiov = reqs[outidx].qiov; |
| 2265 | } else { |
| 2266 | outidx++; |
| 2267 | reqs[outidx].sector = reqs[i].sector; |
| 2268 | reqs[outidx].nb_sectors = reqs[i].nb_sectors; |
| 2269 | reqs[outidx].qiov = reqs[i].qiov; |
| 2270 | } |
| 2271 | } |
| 2272 | |
| 2273 | return outidx + 1; |
| 2274 | } |
| 2275 | |
| 2276 | /* |
| 2277 | * Submit multiple AIO write requests at once. |
| 2278 | * |
| 2279 | * On success, the function returns 0 and all requests in the reqs array have |
| 2280 | * been submitted. In error case this function returns -1, and any of the |
| 2281 | * requests may or may not be submitted yet. In particular, this means that the |
| 2282 | * callback will be called for some of the requests, for others it won't. The |
| 2283 | * caller must check the error field of the BlockRequest to wait for the right |
| 2284 | * callbacks (if error != 0, no callback will be called). |
| 2285 | * |
| 2286 | * The implementation may modify the contents of the reqs array, e.g. to merge |
| 2287 | * requests. However, the fields opaque and error are left unmodified as they |
| 2288 | * are used to signal failure for a single request to the caller. |
| 2289 | */ |
| 2290 | int bdrv_aio_multiwrite(BlockDriverState *bs, BlockRequest *reqs, int num_reqs) |
| 2291 | { |
| 2292 | BlockDriverAIOCB *acb; |
| 2293 | MultiwriteCB *mcb; |
| 2294 | int i; |
| 2295 | |
| 2296 | if (num_reqs == 0) { |
| 2297 | return 0; |
| 2298 | } |
| 2299 | |
| 2300 | // Create MultiwriteCB structure |
| 2301 | mcb = qemu_mallocz(sizeof(*mcb) + num_reqs * sizeof(*mcb->callbacks)); |
| 2302 | mcb->num_requests = 0; |
| 2303 | mcb->num_callbacks = num_reqs; |
| 2304 | |
| 2305 | for (i = 0; i < num_reqs; i++) { |
| 2306 | mcb->callbacks[i].cb = reqs[i].cb; |
| 2307 | mcb->callbacks[i].opaque = reqs[i].opaque; |
| 2308 | } |
| 2309 | |
| 2310 | // Check for mergable requests |
| 2311 | num_reqs = multiwrite_merge(bs, reqs, num_reqs, mcb); |
| 2312 | |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 2313 | trace_bdrv_aio_multiwrite(mcb, mcb->num_callbacks, num_reqs); |
| 2314 | |
Kevin Wolf | 453f9a1 | 2010-07-02 14:01:21 +0200 | [diff] [blame] | 2315 | /* |
| 2316 | * Run the aio requests. As soon as one request can't be submitted |
| 2317 | * successfully, fail all requests that are not yet submitted (we must |
| 2318 | * return failure for all requests anyway) |
| 2319 | * |
| 2320 | * num_requests cannot be set to the right value immediately: If |
| 2321 | * bdrv_aio_writev fails for some request, num_requests would be too high |
| 2322 | * and therefore multiwrite_cb() would never recognize the multiwrite |
| 2323 | * request as completed. We also cannot use the loop variable i to set it |
| 2324 | * when the first request fails because the callback may already have been |
| 2325 | * called for previously submitted requests. Thus, num_requests must be |
| 2326 | * incremented for each request that is submitted. |
| 2327 | * |
| 2328 | * The problem that callbacks may be called early also means that we need |
| 2329 | * to take care that num_requests doesn't become 0 before all requests are |
| 2330 | * submitted - multiwrite_cb() would consider the multiwrite request |
| 2331 | * completed. A dummy request that is "completed" by a manual call to |
| 2332 | * multiwrite_cb() takes care of this. |
| 2333 | */ |
| 2334 | mcb->num_requests = 1; |
| 2335 | |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 2336 | // Run the aio requests |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2337 | for (i = 0; i < num_reqs; i++) { |
Kevin Wolf | 453f9a1 | 2010-07-02 14:01:21 +0200 | [diff] [blame] | 2338 | mcb->num_requests++; |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2339 | acb = bdrv_aio_writev(bs, reqs[i].sector, reqs[i].qiov, |
| 2340 | reqs[i].nb_sectors, multiwrite_cb, mcb); |
| 2341 | |
| 2342 | if (acb == NULL) { |
| 2343 | // We can only fail the whole thing if no request has been |
| 2344 | // submitted yet. Otherwise we'll wait for the submitted AIOs to |
| 2345 | // complete and report the error in the callback. |
Kevin Wolf | 453f9a1 | 2010-07-02 14:01:21 +0200 | [diff] [blame] | 2346 | if (i == 0) { |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 2347 | trace_bdrv_aio_multiwrite_earlyfail(mcb); |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2348 | goto fail; |
| 2349 | } else { |
Stefan Hajnoczi | 6d519a5 | 2010-05-22 18:15:08 +0100 | [diff] [blame] | 2350 | trace_bdrv_aio_multiwrite_latefail(mcb, i); |
Kevin Wolf | 7eb58a6 | 2010-04-06 18:24:07 +0200 | [diff] [blame] | 2351 | multiwrite_cb(mcb, -EIO); |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2352 | break; |
| 2353 | } |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2354 | } |
| 2355 | } |
| 2356 | |
Kevin Wolf | 453f9a1 | 2010-07-02 14:01:21 +0200 | [diff] [blame] | 2357 | /* Complete the dummy request */ |
| 2358 | multiwrite_cb(mcb, 0); |
| 2359 | |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2360 | return 0; |
| 2361 | |
| 2362 | fail: |
Kevin Wolf | 453f9a1 | 2010-07-02 14:01:21 +0200 | [diff] [blame] | 2363 | for (i = 0; i < mcb->num_callbacks; i++) { |
| 2364 | reqs[i].error = -EIO; |
| 2365 | } |
Bruce Rogers | af47459 | 2010-05-13 15:14:33 -0600 | [diff] [blame] | 2366 | qemu_free(mcb); |
Kevin Wolf | 40b4f53 | 2009-09-09 17:53:37 +0200 | [diff] [blame] | 2367 | return -1; |
| 2368 | } |
| 2369 | |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 2370 | BlockDriverAIOCB *bdrv_aio_flush(BlockDriverState *bs, |
| 2371 | BlockDriverCompletionFunc *cb, void *opaque) |
| 2372 | { |
| 2373 | BlockDriver *drv = bs->drv; |
| 2374 | |
Alexander Graf | 016f5cf | 2010-05-26 17:51:49 +0200 | [diff] [blame] | 2375 | if (bs->open_flags & BDRV_O_NO_FLUSH) { |
| 2376 | return bdrv_aio_noop_em(bs, cb, opaque); |
| 2377 | } |
| 2378 | |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 2379 | if (!drv) |
| 2380 | return NULL; |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 2381 | return drv->bdrv_aio_flush(bs, cb, opaque); |
| 2382 | } |
| 2383 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2384 | void bdrv_aio_cancel(BlockDriverAIOCB *acb) |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2385 | { |
aliguori | 6bbff9a | 2009-03-20 18:25:59 +0000 | [diff] [blame] | 2386 | acb->pool->cancel(acb); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2387 | } |
| 2388 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2389 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2390 | /**************************************************************/ |
| 2391 | /* async block device emulation */ |
| 2392 | |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 2393 | typedef struct BlockDriverAIOCBSync { |
| 2394 | BlockDriverAIOCB common; |
| 2395 | QEMUBH *bh; |
| 2396 | int ret; |
| 2397 | /* vector translation state */ |
| 2398 | QEMUIOVector *qiov; |
| 2399 | uint8_t *bounce; |
| 2400 | int is_write; |
| 2401 | } BlockDriverAIOCBSync; |
| 2402 | |
| 2403 | static void bdrv_aio_cancel_em(BlockDriverAIOCB *blockacb) |
| 2404 | { |
Kevin Wolf | b666d23 | 2010-05-05 11:44:39 +0200 | [diff] [blame] | 2405 | BlockDriverAIOCBSync *acb = |
| 2406 | container_of(blockacb, BlockDriverAIOCBSync, common); |
Dor Laor | 6a7ad29 | 2009-06-01 12:07:23 +0300 | [diff] [blame] | 2407 | qemu_bh_delete(acb->bh); |
Avi Kivity | 36afc45 | 2009-06-23 16:20:36 +0300 | [diff] [blame] | 2408 | acb->bh = NULL; |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 2409 | qemu_aio_release(acb); |
| 2410 | } |
| 2411 | |
| 2412 | static AIOPool bdrv_em_aio_pool = { |
| 2413 | .aiocb_size = sizeof(BlockDriverAIOCBSync), |
| 2414 | .cancel = bdrv_aio_cancel_em, |
| 2415 | }; |
| 2416 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2417 | static void bdrv_aio_bh_cb(void *opaque) |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 2418 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2419 | BlockDriverAIOCBSync *acb = opaque; |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2420 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2421 | if (!acb->is_write) |
| 2422 | qemu_iovec_from_buffer(acb->qiov, acb->bounce, acb->qiov->size); |
aliguori | ceb42de | 2009-04-07 18:43:28 +0000 | [diff] [blame] | 2423 | qemu_vfree(acb->bounce); |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2424 | acb->common.cb(acb->common.opaque, acb->ret); |
Dor Laor | 6a7ad29 | 2009-06-01 12:07:23 +0300 | [diff] [blame] | 2425 | qemu_bh_delete(acb->bh); |
Avi Kivity | 36afc45 | 2009-06-23 16:20:36 +0300 | [diff] [blame] | 2426 | acb->bh = NULL; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2427 | qemu_aio_release(acb); |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 2428 | } |
bellard | beac80c | 2006-06-26 20:08:57 +0000 | [diff] [blame] | 2429 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2430 | static BlockDriverAIOCB *bdrv_aio_rw_vector(BlockDriverState *bs, |
| 2431 | int64_t sector_num, |
| 2432 | QEMUIOVector *qiov, |
| 2433 | int nb_sectors, |
| 2434 | BlockDriverCompletionFunc *cb, |
| 2435 | void *opaque, |
| 2436 | int is_write) |
| 2437 | |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 2438 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2439 | BlockDriverAIOCBSync *acb; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2440 | |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 2441 | acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2442 | acb->is_write = is_write; |
| 2443 | acb->qiov = qiov; |
aliguori | e268ca5 | 2009-04-22 20:20:00 +0000 | [diff] [blame] | 2444 | acb->bounce = qemu_blockalign(bs, qiov->size); |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2445 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2446 | if (!acb->bh) |
| 2447 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2448 | |
| 2449 | if (is_write) { |
| 2450 | qemu_iovec_to_buffer(acb->qiov, acb->bounce); |
| 2451 | acb->ret = bdrv_write(bs, sector_num, acb->bounce, nb_sectors); |
| 2452 | } else { |
| 2453 | acb->ret = bdrv_read(bs, sector_num, acb->bounce, nb_sectors); |
| 2454 | } |
| 2455 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2456 | qemu_bh_schedule(acb->bh); |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2457 | |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2458 | return &acb->common; |
pbrook | 7a6cba6 | 2006-06-04 11:39:07 +0000 | [diff] [blame] | 2459 | } |
| 2460 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2461 | static BlockDriverAIOCB *bdrv_aio_readv_em(BlockDriverState *bs, |
| 2462 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2463 | BlockDriverCompletionFunc *cb, void *opaque) |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2464 | { |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2465 | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 0); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2466 | } |
| 2467 | |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2468 | static BlockDriverAIOCB *bdrv_aio_writev_em(BlockDriverState *bs, |
| 2469 | int64_t sector_num, QEMUIOVector *qiov, int nb_sectors, |
| 2470 | BlockDriverCompletionFunc *cb, void *opaque) |
| 2471 | { |
| 2472 | return bdrv_aio_rw_vector(bs, sector_num, qiov, nb_sectors, cb, opaque, 1); |
| 2473 | } |
| 2474 | |
Christoph Hellwig | b2e12bc | 2009-09-04 19:01:49 +0200 | [diff] [blame] | 2475 | static BlockDriverAIOCB *bdrv_aio_flush_em(BlockDriverState *bs, |
| 2476 | BlockDriverCompletionFunc *cb, void *opaque) |
| 2477 | { |
| 2478 | BlockDriverAIOCBSync *acb; |
| 2479 | |
| 2480 | acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
| 2481 | acb->is_write = 1; /* don't bounce in the completion hadler */ |
| 2482 | acb->qiov = NULL; |
| 2483 | acb->bounce = NULL; |
| 2484 | acb->ret = 0; |
| 2485 | |
| 2486 | if (!acb->bh) |
| 2487 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
| 2488 | |
| 2489 | bdrv_flush(bs); |
| 2490 | qemu_bh_schedule(acb->bh); |
| 2491 | return &acb->common; |
| 2492 | } |
| 2493 | |
Alexander Graf | 016f5cf | 2010-05-26 17:51:49 +0200 | [diff] [blame] | 2494 | static BlockDriverAIOCB *bdrv_aio_noop_em(BlockDriverState *bs, |
| 2495 | BlockDriverCompletionFunc *cb, void *opaque) |
| 2496 | { |
| 2497 | BlockDriverAIOCBSync *acb; |
| 2498 | |
| 2499 | acb = qemu_aio_get(&bdrv_em_aio_pool, bs, cb, opaque); |
| 2500 | acb->is_write = 1; /* don't bounce in the completion handler */ |
| 2501 | acb->qiov = NULL; |
| 2502 | acb->bounce = NULL; |
| 2503 | acb->ret = 0; |
| 2504 | |
| 2505 | if (!acb->bh) { |
| 2506 | acb->bh = qemu_bh_new(bdrv_aio_bh_cb, acb); |
| 2507 | } |
| 2508 | |
| 2509 | qemu_bh_schedule(acb->bh); |
| 2510 | return &acb->common; |
| 2511 | } |
| 2512 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2513 | /**************************************************************/ |
| 2514 | /* sync block device emulation */ |
| 2515 | |
| 2516 | static void bdrv_rw_em_cb(void *opaque, int ret) |
| 2517 | { |
| 2518 | *(int *)opaque = ret; |
| 2519 | } |
| 2520 | |
| 2521 | #define NOT_DONE 0x7fffffff |
| 2522 | |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2523 | static int bdrv_read_em(BlockDriverState *bs, int64_t sector_num, |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2524 | uint8_t *buf, int nb_sectors) |
| 2525 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2526 | int async_ret; |
| 2527 | BlockDriverAIOCB *acb; |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2528 | struct iovec iov; |
| 2529 | QEMUIOVector qiov; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2530 | |
Kevin Wolf | 65d6b3d | 2009-10-22 17:54:39 +0200 | [diff] [blame] | 2531 | async_context_push(); |
| 2532 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2533 | async_ret = NOT_DONE; |
blueswir1 | 3f4cb3d | 2009-04-13 16:31:01 +0000 | [diff] [blame] | 2534 | iov.iov_base = (void *)buf; |
Jes Sorensen | eb5a316 | 2010-05-27 16:20:31 +0200 | [diff] [blame] | 2535 | iov.iov_len = nb_sectors * BDRV_SECTOR_SIZE; |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2536 | qemu_iovec_init_external(&qiov, &iov, 1); |
| 2537 | acb = bdrv_aio_readv(bs, sector_num, &qiov, nb_sectors, |
| 2538 | bdrv_rw_em_cb, &async_ret); |
Kevin Wolf | 65d6b3d | 2009-10-22 17:54:39 +0200 | [diff] [blame] | 2539 | if (acb == NULL) { |
| 2540 | async_ret = -1; |
| 2541 | goto fail; |
| 2542 | } |
aliguori | baf35cb | 2008-09-10 15:45:19 +0000 | [diff] [blame] | 2543 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2544 | while (async_ret == NOT_DONE) { |
| 2545 | qemu_aio_wait(); |
| 2546 | } |
aliguori | baf35cb | 2008-09-10 15:45:19 +0000 | [diff] [blame] | 2547 | |
Kevin Wolf | 65d6b3d | 2009-10-22 17:54:39 +0200 | [diff] [blame] | 2548 | |
| 2549 | fail: |
| 2550 | async_context_pop(); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2551 | return async_ret; |
| 2552 | } |
| 2553 | |
| 2554 | static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num, |
| 2555 | const uint8_t *buf, int nb_sectors) |
| 2556 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2557 | int async_ret; |
| 2558 | BlockDriverAIOCB *acb; |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2559 | struct iovec iov; |
| 2560 | QEMUIOVector qiov; |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2561 | |
Kevin Wolf | 65d6b3d | 2009-10-22 17:54:39 +0200 | [diff] [blame] | 2562 | async_context_push(); |
| 2563 | |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2564 | async_ret = NOT_DONE; |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2565 | iov.iov_base = (void *)buf; |
Jes Sorensen | eb5a316 | 2010-05-27 16:20:31 +0200 | [diff] [blame] | 2566 | iov.iov_len = nb_sectors * BDRV_SECTOR_SIZE; |
aliguori | f141eaf | 2009-04-07 18:43:24 +0000 | [diff] [blame] | 2567 | qemu_iovec_init_external(&qiov, &iov, 1); |
| 2568 | acb = bdrv_aio_writev(bs, sector_num, &qiov, nb_sectors, |
| 2569 | bdrv_rw_em_cb, &async_ret); |
Kevin Wolf | 65d6b3d | 2009-10-22 17:54:39 +0200 | [diff] [blame] | 2570 | if (acb == NULL) { |
| 2571 | async_ret = -1; |
| 2572 | goto fail; |
| 2573 | } |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2574 | while (async_ret == NOT_DONE) { |
| 2575 | qemu_aio_wait(); |
| 2576 | } |
Kevin Wolf | 65d6b3d | 2009-10-22 17:54:39 +0200 | [diff] [blame] | 2577 | |
| 2578 | fail: |
| 2579 | async_context_pop(); |
bellard | 83f6409 | 2006-08-01 16:21:11 +0000 | [diff] [blame] | 2580 | return async_ret; |
| 2581 | } |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 2582 | |
| 2583 | void bdrv_init(void) |
| 2584 | { |
Anthony Liguori | 5efa9d5 | 2009-05-09 17:03:42 -0500 | [diff] [blame] | 2585 | module_call_init(MODULE_INIT_BLOCK); |
bellard | ea2384d | 2004-08-01 21:59:26 +0000 | [diff] [blame] | 2586 | } |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2587 | |
Markus Armbruster | eb85201 | 2009-10-27 18:41:44 +0100 | [diff] [blame] | 2588 | void bdrv_init_with_whitelist(void) |
| 2589 | { |
| 2590 | use_bdrv_whitelist = 1; |
| 2591 | bdrv_init(); |
| 2592 | } |
| 2593 | |
Christoph Hellwig | c16b5a2 | 2009-05-25 12:37:32 +0200 | [diff] [blame] | 2594 | void *qemu_aio_get(AIOPool *pool, BlockDriverState *bs, |
| 2595 | BlockDriverCompletionFunc *cb, void *opaque) |
aliguori | 6bbff9a | 2009-03-20 18:25:59 +0000 | [diff] [blame] | 2596 | { |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2597 | BlockDriverAIOCB *acb; |
| 2598 | |
aliguori | 6bbff9a | 2009-03-20 18:25:59 +0000 | [diff] [blame] | 2599 | if (pool->free_aiocb) { |
| 2600 | acb = pool->free_aiocb; |
| 2601 | pool->free_aiocb = acb->next; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2602 | } else { |
aliguori | 6bbff9a | 2009-03-20 18:25:59 +0000 | [diff] [blame] | 2603 | acb = qemu_mallocz(pool->aiocb_size); |
| 2604 | acb->pool = pool; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2605 | } |
| 2606 | acb->bs = bs; |
| 2607 | acb->cb = cb; |
| 2608 | acb->opaque = opaque; |
| 2609 | return acb; |
| 2610 | } |
| 2611 | |
| 2612 | void qemu_aio_release(void *p) |
| 2613 | { |
aliguori | 6bbff9a | 2009-03-20 18:25:59 +0000 | [diff] [blame] | 2614 | BlockDriverAIOCB *acb = (BlockDriverAIOCB *)p; |
| 2615 | AIOPool *pool = acb->pool; |
| 2616 | acb->next = pool->free_aiocb; |
| 2617 | pool->free_aiocb = acb; |
pbrook | ce1a14d | 2006-08-07 02:38:06 +0000 | [diff] [blame] | 2618 | } |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2619 | |
| 2620 | /**************************************************************/ |
| 2621 | /* removable device support */ |
| 2622 | |
| 2623 | /** |
| 2624 | * Return TRUE if the media is present |
| 2625 | */ |
| 2626 | int bdrv_is_inserted(BlockDriverState *bs) |
| 2627 | { |
| 2628 | BlockDriver *drv = bs->drv; |
| 2629 | int ret; |
| 2630 | if (!drv) |
| 2631 | return 0; |
| 2632 | if (!drv->bdrv_is_inserted) |
Markus Armbruster | 4be9762 | 2010-07-27 14:02:01 +0200 | [diff] [blame] | 2633 | return !bs->tray_open; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2634 | ret = drv->bdrv_is_inserted(bs); |
| 2635 | return ret; |
| 2636 | } |
| 2637 | |
| 2638 | /** |
| 2639 | * Return TRUE if the media changed since the last call to this |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 2640 | * function. It is currently only used for floppy disks |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2641 | */ |
| 2642 | int bdrv_media_changed(BlockDriverState *bs) |
| 2643 | { |
| 2644 | BlockDriver *drv = bs->drv; |
| 2645 | int ret; |
| 2646 | |
| 2647 | if (!drv || !drv->bdrv_media_changed) |
| 2648 | ret = -ENOTSUP; |
| 2649 | else |
| 2650 | ret = drv->bdrv_media_changed(bs); |
| 2651 | if (ret == -ENOTSUP) |
| 2652 | ret = bs->media_changed; |
| 2653 | bs->media_changed = 0; |
| 2654 | return ret; |
| 2655 | } |
| 2656 | |
| 2657 | /** |
| 2658 | * If eject_flag is TRUE, eject the media. Otherwise, close the tray |
| 2659 | */ |
Mark McLoughlin | aea2a33 | 2009-05-27 10:06:11 +0100 | [diff] [blame] | 2660 | int bdrv_eject(BlockDriverState *bs, int eject_flag) |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2661 | { |
| 2662 | BlockDriver *drv = bs->drv; |
| 2663 | int ret; |
| 2664 | |
Mark McLoughlin | aea2a33 | 2009-05-27 10:06:11 +0100 | [diff] [blame] | 2665 | if (bs->locked) { |
| 2666 | return -EBUSY; |
| 2667 | } |
| 2668 | |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2669 | if (!drv || !drv->bdrv_eject) { |
| 2670 | ret = -ENOTSUP; |
| 2671 | } else { |
| 2672 | ret = drv->bdrv_eject(bs, eject_flag); |
| 2673 | } |
| 2674 | if (ret == -ENOTSUP) { |
Mark McLoughlin | aea2a33 | 2009-05-27 10:06:11 +0100 | [diff] [blame] | 2675 | ret = 0; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2676 | } |
Markus Armbruster | 4be9762 | 2010-07-27 14:02:01 +0200 | [diff] [blame] | 2677 | if (ret >= 0) { |
| 2678 | bs->tray_open = eject_flag; |
| 2679 | } |
Mark McLoughlin | aea2a33 | 2009-05-27 10:06:11 +0100 | [diff] [blame] | 2680 | |
| 2681 | return ret; |
bellard | 19cb373 | 2006-08-19 11:45:59 +0000 | [diff] [blame] | 2682 | } |
| 2683 | |
| 2684 | int bdrv_is_locked(BlockDriverState *bs) |
| 2685 | { |
| 2686 | return bs->locked; |
| 2687 | } |
| 2688 | |
| 2689 | /** |
| 2690 | * Lock or unlock the media (if it is locked, the user won't be able |
| 2691 | * to eject it manually). |
| 2692 | */ |
| 2693 | void bdrv_set_locked(BlockDriverState *bs, int locked) |
| 2694 | { |
| 2695 | BlockDriver *drv = bs->drv; |
| 2696 | |
| 2697 | bs->locked = locked; |
| 2698 | if (drv && drv->bdrv_set_locked) { |
| 2699 | drv->bdrv_set_locked(bs, locked); |
| 2700 | } |
| 2701 | } |
ths | 985a03b | 2007-12-24 16:10:43 +0000 | [diff] [blame] | 2702 | |
| 2703 | /* needed for generic scsi interface */ |
| 2704 | |
| 2705 | int bdrv_ioctl(BlockDriverState *bs, unsigned long int req, void *buf) |
| 2706 | { |
| 2707 | BlockDriver *drv = bs->drv; |
| 2708 | |
| 2709 | if (drv && drv->bdrv_ioctl) |
| 2710 | return drv->bdrv_ioctl(bs, req, buf); |
| 2711 | return -ENOTSUP; |
| 2712 | } |
aliguori | 7d78066 | 2009-03-12 19:57:08 +0000 | [diff] [blame] | 2713 | |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 2714 | BlockDriverAIOCB *bdrv_aio_ioctl(BlockDriverState *bs, |
| 2715 | unsigned long int req, void *buf, |
| 2716 | BlockDriverCompletionFunc *cb, void *opaque) |
aliguori | 7d78066 | 2009-03-12 19:57:08 +0000 | [diff] [blame] | 2717 | { |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 2718 | BlockDriver *drv = bs->drv; |
aliguori | 7d78066 | 2009-03-12 19:57:08 +0000 | [diff] [blame] | 2719 | |
aliguori | 221f715 | 2009-03-28 17:28:41 +0000 | [diff] [blame] | 2720 | if (drv && drv->bdrv_aio_ioctl) |
| 2721 | return drv->bdrv_aio_ioctl(bs, req, buf, cb, opaque); |
| 2722 | return NULL; |
aliguori | 7d78066 | 2009-03-12 19:57:08 +0000 | [diff] [blame] | 2723 | } |
aliguori | e268ca5 | 2009-04-22 20:20:00 +0000 | [diff] [blame] | 2724 | |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2725 | |
| 2726 | |
aliguori | e268ca5 | 2009-04-22 20:20:00 +0000 | [diff] [blame] | 2727 | void *qemu_blockalign(BlockDriverState *bs, size_t size) |
| 2728 | { |
| 2729 | return qemu_memalign((bs && bs->buffer_alignment) ? bs->buffer_alignment : 512, size); |
| 2730 | } |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2731 | |
| 2732 | void bdrv_set_dirty_tracking(BlockDriverState *bs, int enable) |
| 2733 | { |
| 2734 | int64_t bitmap_size; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2735 | |
Liran Schour | aaa0eb7 | 2010-01-26 10:31:48 +0200 | [diff] [blame] | 2736 | bs->dirty_count = 0; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2737 | if (enable) { |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 2738 | if (!bs->dirty_bitmap) { |
| 2739 | bitmap_size = (bdrv_getlength(bs) >> BDRV_SECTOR_BITS) + |
| 2740 | BDRV_SECTORS_PER_DIRTY_CHUNK * 8 - 1; |
| 2741 | bitmap_size /= BDRV_SECTORS_PER_DIRTY_CHUNK * 8; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2742 | |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2743 | bs->dirty_bitmap = qemu_mallocz(bitmap_size); |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2744 | } |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2745 | } else { |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 2746 | if (bs->dirty_bitmap) { |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2747 | qemu_free(bs->dirty_bitmap); |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 2748 | bs->dirty_bitmap = NULL; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2749 | } |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2750 | } |
| 2751 | } |
| 2752 | |
| 2753 | int bdrv_get_dirty(BlockDriverState *bs, int64_t sector) |
| 2754 | { |
Jan Kiszka | 6ea4430 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2755 | int64_t chunk = sector / (int64_t)BDRV_SECTORS_PER_DIRTY_CHUNK; |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2756 | |
Jan Kiszka | c6d2283 | 2009-11-30 18:21:20 +0100 | [diff] [blame] | 2757 | if (bs->dirty_bitmap && |
| 2758 | (sector << BDRV_SECTOR_BITS) < bdrv_getlength(bs)) { |
Marcelo Tosatti | 6d59fec | 2010-11-08 17:02:54 -0200 | [diff] [blame] | 2759 | return !!(bs->dirty_bitmap[chunk / (sizeof(unsigned long) * 8)] & |
| 2760 | (1UL << (chunk % (sizeof(unsigned long) * 8)))); |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2761 | } else { |
| 2762 | return 0; |
| 2763 | } |
| 2764 | } |
| 2765 | |
Jan Kiszka | a55eb92 | 2009-11-30 18:21:19 +0100 | [diff] [blame] | 2766 | void bdrv_reset_dirty(BlockDriverState *bs, int64_t cur_sector, |
| 2767 | int nr_sectors) |
lirans@il.ibm.com | 7cd1e32 | 2009-11-02 15:40:41 +0200 | [diff] [blame] | 2768 | { |
| 2769 | set_dirty_bitmap(bs, cur_sector, nr_sectors, 0); |
| 2770 | } |
Liran Schour | aaa0eb7 | 2010-01-26 10:31:48 +0200 | [diff] [blame] | 2771 | |
| 2772 | int64_t bdrv_get_dirty_count(BlockDriverState *bs) |
| 2773 | { |
| 2774 | return bs->dirty_count; |
| 2775 | } |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2776 | |
Marcelo Tosatti | db593f2 | 2011-01-26 12:12:34 -0200 | [diff] [blame^] | 2777 | void bdrv_set_in_use(BlockDriverState *bs, int in_use) |
| 2778 | { |
| 2779 | assert(bs->in_use != in_use); |
| 2780 | bs->in_use = in_use; |
| 2781 | } |
| 2782 | |
| 2783 | int bdrv_in_use(BlockDriverState *bs) |
| 2784 | { |
| 2785 | return bs->in_use; |
| 2786 | } |
| 2787 | |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2788 | int bdrv_img_create(const char *filename, const char *fmt, |
| 2789 | const char *base_filename, const char *base_fmt, |
| 2790 | char *options, uint64_t img_size, int flags) |
| 2791 | { |
| 2792 | QEMUOptionParameter *param = NULL, *create_options = NULL; |
Jes Sorensen | 792da93 | 2010-12-16 13:52:17 +0100 | [diff] [blame] | 2793 | QEMUOptionParameter *backing_fmt, *backing_file; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2794 | BlockDriverState *bs = NULL; |
| 2795 | BlockDriver *drv, *proto_drv; |
Stefan Hajnoczi | 96df67d | 2011-01-24 09:32:20 +0000 | [diff] [blame] | 2796 | BlockDriver *backing_drv = NULL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2797 | int ret = 0; |
| 2798 | |
| 2799 | /* Find driver and parse its options */ |
| 2800 | drv = bdrv_find_format(fmt); |
| 2801 | if (!drv) { |
| 2802 | error_report("Unknown file format '%s'", fmt); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2803 | ret = -EINVAL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2804 | goto out; |
| 2805 | } |
| 2806 | |
| 2807 | proto_drv = bdrv_find_protocol(filename); |
| 2808 | if (!proto_drv) { |
| 2809 | error_report("Unknown protocol '%s'", filename); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2810 | ret = -EINVAL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2811 | goto out; |
| 2812 | } |
| 2813 | |
| 2814 | create_options = append_option_parameters(create_options, |
| 2815 | drv->create_options); |
| 2816 | create_options = append_option_parameters(create_options, |
| 2817 | proto_drv->create_options); |
| 2818 | |
| 2819 | /* Create parameter list with default values */ |
| 2820 | param = parse_option_parameters("", create_options, param); |
| 2821 | |
| 2822 | set_option_parameter_int(param, BLOCK_OPT_SIZE, img_size); |
| 2823 | |
| 2824 | /* Parse -o options */ |
| 2825 | if (options) { |
| 2826 | param = parse_option_parameters(options, create_options, param); |
| 2827 | if (param == NULL) { |
| 2828 | error_report("Invalid options for file format '%s'.", fmt); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2829 | ret = -EINVAL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2830 | goto out; |
| 2831 | } |
| 2832 | } |
| 2833 | |
| 2834 | if (base_filename) { |
| 2835 | if (set_option_parameter(param, BLOCK_OPT_BACKING_FILE, |
| 2836 | base_filename)) { |
| 2837 | error_report("Backing file not supported for file format '%s'", |
| 2838 | fmt); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2839 | ret = -EINVAL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2840 | goto out; |
| 2841 | } |
| 2842 | } |
| 2843 | |
| 2844 | if (base_fmt) { |
| 2845 | if (set_option_parameter(param, BLOCK_OPT_BACKING_FMT, base_fmt)) { |
| 2846 | error_report("Backing file format not supported for file " |
| 2847 | "format '%s'", fmt); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2848 | ret = -EINVAL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2849 | goto out; |
| 2850 | } |
| 2851 | } |
| 2852 | |
Jes Sorensen | 792da93 | 2010-12-16 13:52:17 +0100 | [diff] [blame] | 2853 | backing_file = get_option_parameter(param, BLOCK_OPT_BACKING_FILE); |
| 2854 | if (backing_file && backing_file->value.s) { |
| 2855 | if (!strcmp(filename, backing_file->value.s)) { |
| 2856 | error_report("Error: Trying to create an image with the " |
| 2857 | "same filename as the backing file"); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2858 | ret = -EINVAL; |
Jes Sorensen | 792da93 | 2010-12-16 13:52:17 +0100 | [diff] [blame] | 2859 | goto out; |
| 2860 | } |
| 2861 | } |
| 2862 | |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2863 | backing_fmt = get_option_parameter(param, BLOCK_OPT_BACKING_FMT); |
| 2864 | if (backing_fmt && backing_fmt->value.s) { |
Stefan Hajnoczi | 96df67d | 2011-01-24 09:32:20 +0000 | [diff] [blame] | 2865 | backing_drv = bdrv_find_format(backing_fmt->value.s); |
| 2866 | if (!backing_drv) { |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2867 | error_report("Unknown backing file format '%s'", |
| 2868 | backing_fmt->value.s); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2869 | ret = -EINVAL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2870 | goto out; |
| 2871 | } |
| 2872 | } |
| 2873 | |
| 2874 | // The size for the image must always be specified, with one exception: |
| 2875 | // If we are using a backing file, we can obtain the size from there |
| 2876 | if (get_option_parameter(param, BLOCK_OPT_SIZE)->value.n == -1) { |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2877 | if (backing_file && backing_file->value.s) { |
| 2878 | uint64_t size; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2879 | char buf[32]; |
| 2880 | |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2881 | bs = bdrv_new(""); |
| 2882 | |
Stefan Hajnoczi | 96df67d | 2011-01-24 09:32:20 +0000 | [diff] [blame] | 2883 | ret = bdrv_open(bs, backing_file->value.s, flags, backing_drv); |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2884 | if (ret < 0) { |
Stefan Hajnoczi | 96df67d | 2011-01-24 09:32:20 +0000 | [diff] [blame] | 2885 | error_report("Could not open '%s'", backing_file->value.s); |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2886 | goto out; |
| 2887 | } |
| 2888 | bdrv_get_geometry(bs, &size); |
| 2889 | size *= 512; |
| 2890 | |
| 2891 | snprintf(buf, sizeof(buf), "%" PRId64, size); |
| 2892 | set_option_parameter(param, BLOCK_OPT_SIZE, buf); |
| 2893 | } else { |
| 2894 | error_report("Image creation needs a size parameter"); |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2895 | ret = -EINVAL; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2896 | goto out; |
| 2897 | } |
| 2898 | } |
| 2899 | |
| 2900 | printf("Formatting '%s', fmt=%s ", filename, fmt); |
| 2901 | print_option_parameters(param); |
| 2902 | puts(""); |
| 2903 | |
| 2904 | ret = bdrv_create(drv, filename, param); |
| 2905 | |
| 2906 | if (ret < 0) { |
| 2907 | if (ret == -ENOTSUP) { |
| 2908 | error_report("Formatting or formatting option not supported for " |
| 2909 | "file format '%s'", fmt); |
| 2910 | } else if (ret == -EFBIG) { |
| 2911 | error_report("The image size is too large for file format '%s'", |
| 2912 | fmt); |
| 2913 | } else { |
| 2914 | error_report("%s: error while creating %s: %s", filename, fmt, |
| 2915 | strerror(-ret)); |
| 2916 | } |
| 2917 | } |
| 2918 | |
| 2919 | out: |
| 2920 | free_option_parameters(create_options); |
| 2921 | free_option_parameters(param); |
| 2922 | |
| 2923 | if (bs) { |
| 2924 | bdrv_delete(bs); |
| 2925 | } |
Jes Sorensen | 4f70f24 | 2010-12-16 13:52:18 +0100 | [diff] [blame] | 2926 | |
| 2927 | return ret; |
Jes Sorensen | f88e1a4 | 2010-12-16 13:52:15 +0100 | [diff] [blame] | 2928 | } |