1 /* 2 * QEMU host block devices 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or 7 * later. See the COPYING file in the top-level directory. 8 * 9 * This file incorporates work covered by the following copyright and 10 * permission notice: 11 * 12 * Copyright (c) 2003-2008 Fabrice Bellard 13 * 14 * Permission is hereby granted, free of charge, to any person obtaining a copy 15 * of this software and associated documentation files (the "Software"), to deal 16 * in the Software without restriction, including without limitation the rights 17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 18 * copies of the Software, and to permit persons to whom the Software is 19 * furnished to do so, subject to the following conditions: 20 * 21 * The above copyright notice and this permission notice shall be included in 22 * all copies or substantial portions of the Software. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 30 * THE SOFTWARE. 31 */ 32 33 #include "sysemu/blockdev.h" 34 #include "hw/block/block.h" 35 #include "block/blockjob.h" 36 #include "monitor/monitor.h" 37 #include "qapi/qmp/qerror.h" 38 #include "qemu/option.h" 39 #include "qemu/config-file.h" 40 #include "qapi/qmp/types.h" 41 #include "sysemu/sysemu.h" 42 #include "block/block_int.h" 43 #include "qmp-commands.h" 44 #include "trace.h" 45 #include "sysemu/arch_init.h" 46 47 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); 48 extern QemuOptsList qemu_common_drive_opts; 49 50 static const char *const if_name[IF_COUNT] = { 51 [IF_NONE] = "none", 52 [IF_IDE] = "ide", 53 [IF_SCSI] = "scsi", 54 [IF_FLOPPY] = "floppy", 55 [IF_PFLASH] = "pflash", 56 [IF_MTD] = "mtd", 57 [IF_SD] = "sd", 58 [IF_VIRTIO] = "virtio", 59 [IF_XEN] = "xen", 60 }; 61 62 static const int if_max_devs[IF_COUNT] = { 63 /* 64 * Do not change these numbers! They govern how drive option 65 * index maps to unit and bus. That mapping is ABI. 66 * 67 * All controllers used to imlement if=T drives need to support 68 * if_max_devs[T] units, for any T with if_max_devs[T] != 0. 69 * Otherwise, some index values map to "impossible" bus, unit 70 * values. 71 * 72 * For instance, if you change [IF_SCSI] to 255, -drive 73 * if=scsi,index=12 no longer means bus=1,unit=5, but 74 * bus=0,unit=12. With an lsi53c895a controller (7 units max), 75 * the drive can't be set up. Regression. 76 */ 77 [IF_IDE] = 2, 78 [IF_SCSI] = 7, 79 }; 80 81 /* 82 * We automatically delete the drive when a device using it gets 83 * unplugged. Questionable feature, but we can't just drop it. 84 * Device models call blockdev_mark_auto_del() to schedule the 85 * automatic deletion, and generic qdev code calls blockdev_auto_del() 86 * when deletion is actually safe. 87 */ 88 void blockdev_mark_auto_del(BlockDriverState *bs) 89 { 90 DriveInfo *dinfo = drive_get_by_blockdev(bs); 91 92 if (bs->job) { 93 block_job_cancel(bs->job); 94 } 95 if (dinfo) { 96 dinfo->auto_del = 1; 97 } 98 } 99 100 void blockdev_auto_del(BlockDriverState *bs) 101 { 102 DriveInfo *dinfo = drive_get_by_blockdev(bs); 103 104 if (dinfo && dinfo->auto_del) { 105 drive_put_ref(dinfo); 106 } 107 } 108 109 static int drive_index_to_bus_id(BlockInterfaceType type, int index) 110 { 111 int max_devs = if_max_devs[type]; 112 return max_devs ? index / max_devs : 0; 113 } 114 115 static int drive_index_to_unit_id(BlockInterfaceType type, int index) 116 { 117 int max_devs = if_max_devs[type]; 118 return max_devs ? index % max_devs : index; 119 } 120 121 QemuOpts *drive_def(const char *optstr) 122 { 123 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); 124 } 125 126 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, 127 const char *optstr) 128 { 129 QemuOpts *opts; 130 char buf[32]; 131 132 opts = drive_def(optstr); 133 if (!opts) { 134 return NULL; 135 } 136 if (type != IF_DEFAULT) { 137 qemu_opt_set(opts, "if", if_name[type]); 138 } 139 if (index >= 0) { 140 snprintf(buf, sizeof(buf), "%d", index); 141 qemu_opt_set(opts, "index", buf); 142 } 143 if (file) 144 qemu_opt_set(opts, "file", file); 145 return opts; 146 } 147 148 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) 149 { 150 DriveInfo *dinfo; 151 152 /* seek interface, bus and unit */ 153 154 QTAILQ_FOREACH(dinfo, &drives, next) { 155 if (dinfo->type == type && 156 dinfo->bus == bus && 157 dinfo->unit == unit) 158 return dinfo; 159 } 160 161 return NULL; 162 } 163 164 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) 165 { 166 return drive_get(type, 167 drive_index_to_bus_id(type, index), 168 drive_index_to_unit_id(type, index)); 169 } 170 171 int drive_get_max_bus(BlockInterfaceType type) 172 { 173 int max_bus; 174 DriveInfo *dinfo; 175 176 max_bus = -1; 177 QTAILQ_FOREACH(dinfo, &drives, next) { 178 if(dinfo->type == type && 179 dinfo->bus > max_bus) 180 max_bus = dinfo->bus; 181 } 182 return max_bus; 183 } 184 185 /* Get a block device. This should only be used for single-drive devices 186 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the 187 appropriate bus. */ 188 DriveInfo *drive_get_next(BlockInterfaceType type) 189 { 190 static int next_block_unit[IF_COUNT]; 191 192 return drive_get(type, 0, next_block_unit[type]++); 193 } 194 195 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) 196 { 197 DriveInfo *dinfo; 198 199 QTAILQ_FOREACH(dinfo, &drives, next) { 200 if (dinfo->bdrv == bs) { 201 return dinfo; 202 } 203 } 204 return NULL; 205 } 206 207 static void bdrv_format_print(void *opaque, const char *name) 208 { 209 error_printf(" %s", name); 210 } 211 212 static void drive_uninit(DriveInfo *dinfo) 213 { 214 qemu_opts_del(dinfo->opts); 215 bdrv_unref(dinfo->bdrv); 216 g_free(dinfo->id); 217 QTAILQ_REMOVE(&drives, dinfo, next); 218 g_free(dinfo->serial); 219 g_free(dinfo); 220 } 221 222 void drive_put_ref(DriveInfo *dinfo) 223 { 224 assert(dinfo->refcount); 225 if (--dinfo->refcount == 0) { 226 drive_uninit(dinfo); 227 } 228 } 229 230 void drive_get_ref(DriveInfo *dinfo) 231 { 232 dinfo->refcount++; 233 } 234 235 typedef struct { 236 QEMUBH *bh; 237 BlockDriverState *bs; 238 } BDRVPutRefBH; 239 240 static void bdrv_put_ref_bh(void *opaque) 241 { 242 BDRVPutRefBH *s = opaque; 243 244 bdrv_unref(s->bs); 245 qemu_bh_delete(s->bh); 246 g_free(s); 247 } 248 249 /* 250 * Release a BDS reference in a BH 251 * 252 * It is not safe to use bdrv_unref() from a callback function when the callers 253 * still need the BlockDriverState. In such cases we schedule a BH to release 254 * the reference. 255 */ 256 static void bdrv_put_ref_bh_schedule(BlockDriverState *bs) 257 { 258 BDRVPutRefBH *s; 259 260 s = g_new(BDRVPutRefBH, 1); 261 s->bh = qemu_bh_new(bdrv_put_ref_bh, s); 262 s->bs = bs; 263 qemu_bh_schedule(s->bh); 264 } 265 266 static int parse_block_error_action(const char *buf, bool is_read) 267 { 268 if (!strcmp(buf, "ignore")) { 269 return BLOCKDEV_ON_ERROR_IGNORE; 270 } else if (!is_read && !strcmp(buf, "enospc")) { 271 return BLOCKDEV_ON_ERROR_ENOSPC; 272 } else if (!strcmp(buf, "stop")) { 273 return BLOCKDEV_ON_ERROR_STOP; 274 } else if (!strcmp(buf, "report")) { 275 return BLOCKDEV_ON_ERROR_REPORT; 276 } else { 277 error_report("'%s' invalid %s error action", 278 buf, is_read ? "read" : "write"); 279 return -1; 280 } 281 } 282 283 static bool check_throttle_config(ThrottleConfig *cfg, Error **errp) 284 { 285 if (throttle_conflicting(cfg)) { 286 error_setg(errp, "bps/iops/max total values and read/write values" 287 " cannot be used at the same time"); 288 return false; 289 } 290 291 if (!throttle_is_valid(cfg)) { 292 error_setg(errp, "bps/iops/maxs values must be 0 or greater"); 293 return false; 294 } 295 296 return true; 297 } 298 299 static DriveInfo *blockdev_init(QemuOpts *all_opts, 300 BlockInterfaceType block_default_type) 301 { 302 const char *buf; 303 const char *file = NULL; 304 const char *serial; 305 const char *mediastr = ""; 306 BlockInterfaceType type; 307 enum { MEDIA_DISK, MEDIA_CDROM } media; 308 int bus_id, unit_id; 309 int cyls, heads, secs, translation; 310 int max_devs; 311 int index; 312 int ro = 0; 313 int bdrv_flags = 0; 314 int on_read_error, on_write_error; 315 const char *devaddr; 316 DriveInfo *dinfo; 317 ThrottleConfig cfg; 318 int snapshot = 0; 319 bool copy_on_read; 320 int ret; 321 Error *error = NULL; 322 QemuOpts *opts; 323 QDict *bs_opts; 324 const char *id; 325 bool has_driver_specific_opts; 326 BlockDriver *drv = NULL; 327 328 translation = BIOS_ATA_TRANSLATION_AUTO; 329 media = MEDIA_DISK; 330 331 /* Check common options by copying from all_opts to opts, all other options 332 * are stored in bs_opts. */ 333 id = qemu_opts_id(all_opts); 334 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error); 335 if (error_is_set(&error)) { 336 qerror_report_err(error); 337 error_free(error); 338 return NULL; 339 } 340 341 bs_opts = qdict_new(); 342 qemu_opts_to_qdict(all_opts, bs_opts); 343 qemu_opts_absorb_qdict(opts, bs_opts, &error); 344 if (error_is_set(&error)) { 345 qerror_report_err(error); 346 error_free(error); 347 return NULL; 348 } 349 350 if (id) { 351 qdict_del(bs_opts, "id"); 352 } 353 354 has_driver_specific_opts = !!qdict_size(bs_opts); 355 356 /* extract parameters */ 357 bus_id = qemu_opt_get_number(opts, "bus", 0); 358 unit_id = qemu_opt_get_number(opts, "unit", -1); 359 index = qemu_opt_get_number(opts, "index", -1); 360 361 cyls = qemu_opt_get_number(opts, "cyls", 0); 362 heads = qemu_opt_get_number(opts, "heads", 0); 363 secs = qemu_opt_get_number(opts, "secs", 0); 364 365 snapshot = qemu_opt_get_bool(opts, "snapshot", 0); 366 ro = qemu_opt_get_bool(opts, "read-only", 0); 367 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); 368 369 file = qemu_opt_get(opts, "file"); 370 serial = qemu_opt_get(opts, "serial"); 371 372 if ((buf = qemu_opt_get(opts, "if")) != NULL) { 373 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) 374 ; 375 if (type == IF_COUNT) { 376 error_report("unsupported bus type '%s'", buf); 377 return NULL; 378 } 379 } else { 380 type = block_default_type; 381 } 382 383 max_devs = if_max_devs[type]; 384 385 if (cyls || heads || secs) { 386 if (cyls < 1) { 387 error_report("invalid physical cyls number"); 388 return NULL; 389 } 390 if (heads < 1) { 391 error_report("invalid physical heads number"); 392 return NULL; 393 } 394 if (secs < 1) { 395 error_report("invalid physical secs number"); 396 return NULL; 397 } 398 } 399 400 if ((buf = qemu_opt_get(opts, "trans")) != NULL) { 401 if (!cyls) { 402 error_report("'%s' trans must be used with cyls, heads and secs", 403 buf); 404 return NULL; 405 } 406 if (!strcmp(buf, "none")) 407 translation = BIOS_ATA_TRANSLATION_NONE; 408 else if (!strcmp(buf, "lba")) 409 translation = BIOS_ATA_TRANSLATION_LBA; 410 else if (!strcmp(buf, "auto")) 411 translation = BIOS_ATA_TRANSLATION_AUTO; 412 else { 413 error_report("'%s' invalid translation type", buf); 414 return NULL; 415 } 416 } 417 418 if ((buf = qemu_opt_get(opts, "media")) != NULL) { 419 if (!strcmp(buf, "disk")) { 420 media = MEDIA_DISK; 421 } else if (!strcmp(buf, "cdrom")) { 422 if (cyls || secs || heads) { 423 error_report("CHS can't be set with media=%s", buf); 424 return NULL; 425 } 426 media = MEDIA_CDROM; 427 } else { 428 error_report("'%s' invalid media", buf); 429 return NULL; 430 } 431 } 432 433 if ((buf = qemu_opt_get(opts, "discard")) != NULL) { 434 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { 435 error_report("invalid discard option"); 436 return NULL; 437 } 438 } 439 440 if (qemu_opt_get_bool(opts, "cache.writeback", true)) { 441 bdrv_flags |= BDRV_O_CACHE_WB; 442 } 443 if (qemu_opt_get_bool(opts, "cache.direct", false)) { 444 bdrv_flags |= BDRV_O_NOCACHE; 445 } 446 if (qemu_opt_get_bool(opts, "cache.no-flush", false)) { 447 bdrv_flags |= BDRV_O_NO_FLUSH; 448 } 449 450 #ifdef CONFIG_LINUX_AIO 451 if ((buf = qemu_opt_get(opts, "aio")) != NULL) { 452 if (!strcmp(buf, "native")) { 453 bdrv_flags |= BDRV_O_NATIVE_AIO; 454 } else if (!strcmp(buf, "threads")) { 455 /* this is the default */ 456 } else { 457 error_report("invalid aio option"); 458 return NULL; 459 } 460 } 461 #endif 462 463 if ((buf = qemu_opt_get(opts, "format")) != NULL) { 464 if (is_help_option(buf)) { 465 error_printf("Supported formats:"); 466 bdrv_iterate_format(bdrv_format_print, NULL); 467 error_printf("\n"); 468 return NULL; 469 } 470 471 drv = bdrv_find_whitelisted_format(buf, ro); 472 if (!drv) { 473 if (!ro && bdrv_find_whitelisted_format(buf, !ro)) { 474 error_report("'%s' can be only used as read-only device.", buf); 475 } else { 476 error_report("'%s' invalid format", buf); 477 } 478 return NULL; 479 } 480 } 481 482 /* disk I/O throttling */ 483 memset(&cfg, 0, sizeof(cfg)); 484 cfg.buckets[THROTTLE_BPS_TOTAL].avg = 485 qemu_opt_get_number(opts, "throttling.bps-total", 0); 486 cfg.buckets[THROTTLE_BPS_READ].avg = 487 qemu_opt_get_number(opts, "throttling.bps-read", 0); 488 cfg.buckets[THROTTLE_BPS_WRITE].avg = 489 qemu_opt_get_number(opts, "throttling.bps-write", 0); 490 cfg.buckets[THROTTLE_OPS_TOTAL].avg = 491 qemu_opt_get_number(opts, "throttling.iops-total", 0); 492 cfg.buckets[THROTTLE_OPS_READ].avg = 493 qemu_opt_get_number(opts, "throttling.iops-read", 0); 494 cfg.buckets[THROTTLE_OPS_WRITE].avg = 495 qemu_opt_get_number(opts, "throttling.iops-write", 0); 496 497 cfg.buckets[THROTTLE_BPS_TOTAL].max = 498 qemu_opt_get_number(opts, "throttling.bps-total-max", 0); 499 cfg.buckets[THROTTLE_BPS_READ].max = 500 qemu_opt_get_number(opts, "throttling.bps-read-max", 0); 501 cfg.buckets[THROTTLE_BPS_WRITE].max = 502 qemu_opt_get_number(opts, "throttling.bps-write-max", 0); 503 cfg.buckets[THROTTLE_OPS_TOTAL].max = 504 qemu_opt_get_number(opts, "throttling.iops-total-max", 0); 505 cfg.buckets[THROTTLE_OPS_READ].max = 506 qemu_opt_get_number(opts, "throttling.iops-read-max", 0); 507 cfg.buckets[THROTTLE_OPS_WRITE].max = 508 qemu_opt_get_number(opts, "throttling.iops-write-max", 0); 509 510 cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0); 511 512 if (!check_throttle_config(&cfg, &error)) { 513 error_report("%s", error_get_pretty(error)); 514 error_free(error); 515 return NULL; 516 } 517 518 if (qemu_opt_get(opts, "boot") != NULL) { 519 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " 520 "ignored. Future versions will reject this parameter. Please " 521 "update your scripts.\n"); 522 } 523 524 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; 525 if ((buf = qemu_opt_get(opts, "werror")) != NULL) { 526 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { 527 error_report("werror is not supported by this bus type"); 528 return NULL; 529 } 530 531 on_write_error = parse_block_error_action(buf, 0); 532 if (on_write_error < 0) { 533 return NULL; 534 } 535 } 536 537 on_read_error = BLOCKDEV_ON_ERROR_REPORT; 538 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { 539 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) { 540 error_report("rerror is not supported by this bus type"); 541 return NULL; 542 } 543 544 on_read_error = parse_block_error_action(buf, 1); 545 if (on_read_error < 0) { 546 return NULL; 547 } 548 } 549 550 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { 551 if (type != IF_VIRTIO) { 552 error_report("addr is not supported by this bus type"); 553 return NULL; 554 } 555 } 556 557 /* compute bus and unit according index */ 558 559 if (index != -1) { 560 if (bus_id != 0 || unit_id != -1) { 561 error_report("index cannot be used with bus and unit"); 562 return NULL; 563 } 564 bus_id = drive_index_to_bus_id(type, index); 565 unit_id = drive_index_to_unit_id(type, index); 566 } 567 568 /* if user doesn't specify a unit_id, 569 * try to find the first free 570 */ 571 572 if (unit_id == -1) { 573 unit_id = 0; 574 while (drive_get(type, bus_id, unit_id) != NULL) { 575 unit_id++; 576 if (max_devs && unit_id >= max_devs) { 577 unit_id -= max_devs; 578 bus_id++; 579 } 580 } 581 } 582 583 /* check unit id */ 584 585 if (max_devs && unit_id >= max_devs) { 586 error_report("unit %d too big (max is %d)", 587 unit_id, max_devs - 1); 588 return NULL; 589 } 590 591 /* 592 * catch multiple definitions 593 */ 594 595 if (drive_get(type, bus_id, unit_id) != NULL) { 596 error_report("drive with bus=%d, unit=%d (index=%d) exists", 597 bus_id, unit_id, index); 598 return NULL; 599 } 600 601 /* init */ 602 603 dinfo = g_malloc0(sizeof(*dinfo)); 604 if ((buf = qemu_opts_id(opts)) != NULL) { 605 dinfo->id = g_strdup(buf); 606 } else { 607 /* no id supplied -> create one */ 608 dinfo->id = g_malloc0(32); 609 if (type == IF_IDE || type == IF_SCSI) 610 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; 611 if (max_devs) 612 snprintf(dinfo->id, 32, "%s%i%s%i", 613 if_name[type], bus_id, mediastr, unit_id); 614 else 615 snprintf(dinfo->id, 32, "%s%s%i", 616 if_name[type], mediastr, unit_id); 617 } 618 dinfo->bdrv = bdrv_new(dinfo->id); 619 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; 620 dinfo->bdrv->read_only = ro; 621 dinfo->devaddr = devaddr; 622 dinfo->type = type; 623 dinfo->bus = bus_id; 624 dinfo->unit = unit_id; 625 dinfo->cyls = cyls; 626 dinfo->heads = heads; 627 dinfo->secs = secs; 628 dinfo->trans = translation; 629 dinfo->opts = all_opts; 630 dinfo->refcount = 1; 631 if (serial != NULL) { 632 dinfo->serial = g_strdup(serial); 633 } 634 QTAILQ_INSERT_TAIL(&drives, dinfo, next); 635 636 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); 637 638 /* disk I/O throttling */ 639 if (throttle_enabled(&cfg)) { 640 bdrv_io_limits_enable(dinfo->bdrv); 641 bdrv_set_io_limits(dinfo->bdrv, &cfg); 642 } 643 644 switch(type) { 645 case IF_IDE: 646 case IF_SCSI: 647 case IF_XEN: 648 case IF_NONE: 649 dinfo->media_cd = media == MEDIA_CDROM; 650 break; 651 case IF_SD: 652 case IF_FLOPPY: 653 case IF_PFLASH: 654 case IF_MTD: 655 break; 656 case IF_VIRTIO: 657 { 658 /* add virtio block device */ 659 QemuOpts *devopts; 660 devopts = qemu_opts_create_nofail(qemu_find_opts("device")); 661 if (arch_type == QEMU_ARCH_S390X) { 662 qemu_opt_set(devopts, "driver", "virtio-blk-s390"); 663 } else { 664 qemu_opt_set(devopts, "driver", "virtio-blk-pci"); 665 } 666 qemu_opt_set(devopts, "drive", dinfo->id); 667 if (devaddr) 668 qemu_opt_set(devopts, "addr", devaddr); 669 break; 670 } 671 default: 672 abort(); 673 } 674 if (!file || !*file) { 675 if (has_driver_specific_opts) { 676 file = NULL; 677 } else { 678 return dinfo; 679 } 680 } 681 if (snapshot) { 682 /* always use cache=unsafe with snapshot */ 683 bdrv_flags &= ~BDRV_O_CACHE_MASK; 684 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); 685 } 686 687 if (copy_on_read) { 688 bdrv_flags |= BDRV_O_COPY_ON_READ; 689 } 690 691 if (runstate_check(RUN_STATE_INMIGRATE)) { 692 bdrv_flags |= BDRV_O_INCOMING; 693 } 694 695 if (media == MEDIA_CDROM) { 696 /* CDROM is fine for any interface, don't check. */ 697 ro = 1; 698 } else if (ro == 1) { 699 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && 700 type != IF_NONE && type != IF_PFLASH) { 701 error_report("read-only not supported by this bus type"); 702 goto err; 703 } 704 } 705 706 bdrv_flags |= ro ? 0 : BDRV_O_RDWR; 707 708 if (ro && copy_on_read) { 709 error_report("warning: disabling copy_on_read on read-only drive"); 710 } 711 712 QINCREF(bs_opts); 713 ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error); 714 715 if (ret < 0) { 716 error_report("could not open disk image %s: %s", 717 file ?: dinfo->id, error_get_pretty(error)); 718 goto err; 719 } 720 721 if (bdrv_key_required(dinfo->bdrv)) 722 autostart = 0; 723 724 QDECREF(bs_opts); 725 qemu_opts_del(opts); 726 727 return dinfo; 728 729 err: 730 qemu_opts_del(opts); 731 QDECREF(bs_opts); 732 bdrv_unref(dinfo->bdrv); 733 g_free(dinfo->id); 734 QTAILQ_REMOVE(&drives, dinfo, next); 735 g_free(dinfo); 736 return NULL; 737 } 738 739 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to) 740 { 741 const char *value; 742 743 value = qemu_opt_get(opts, from); 744 if (value) { 745 qemu_opt_set(opts, to, value); 746 qemu_opt_unset(opts, from); 747 } 748 } 749 750 DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) 751 { 752 const char *value; 753 754 /* Change legacy command line options into QMP ones */ 755 qemu_opt_rename(all_opts, "iops", "throttling.iops-total"); 756 qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read"); 757 qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write"); 758 759 qemu_opt_rename(all_opts, "bps", "throttling.bps-total"); 760 qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read"); 761 qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write"); 762 763 qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max"); 764 qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max"); 765 qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max"); 766 767 qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max"); 768 qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max"); 769 qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max"); 770 771 qemu_opt_rename(all_opts, 772 "iops_size", "throttling.iops-size"); 773 774 qemu_opt_rename(all_opts, "readonly", "read-only"); 775 776 value = qemu_opt_get(all_opts, "cache"); 777 if (value) { 778 int flags = 0; 779 780 if (bdrv_parse_cache_flags(value, &flags) != 0) { 781 error_report("invalid cache option"); 782 return NULL; 783 } 784 785 /* Specific options take precedence */ 786 if (!qemu_opt_get(all_opts, "cache.writeback")) { 787 qemu_opt_set_bool(all_opts, "cache.writeback", 788 !!(flags & BDRV_O_CACHE_WB)); 789 } 790 if (!qemu_opt_get(all_opts, "cache.direct")) { 791 qemu_opt_set_bool(all_opts, "cache.direct", 792 !!(flags & BDRV_O_NOCACHE)); 793 } 794 if (!qemu_opt_get(all_opts, "cache.no-flush")) { 795 qemu_opt_set_bool(all_opts, "cache.no-flush", 796 !!(flags & BDRV_O_NO_FLUSH)); 797 } 798 qemu_opt_unset(all_opts, "cache"); 799 } 800 801 return blockdev_init(all_opts, block_default_type); 802 } 803 804 void do_commit(Monitor *mon, const QDict *qdict) 805 { 806 const char *device = qdict_get_str(qdict, "device"); 807 BlockDriverState *bs; 808 int ret; 809 810 if (!strcmp(device, "all")) { 811 ret = bdrv_commit_all(); 812 } else { 813 bs = bdrv_find(device); 814 if (!bs) { 815 monitor_printf(mon, "Device '%s' not found\n", device); 816 return; 817 } 818 ret = bdrv_commit(bs); 819 } 820 if (ret < 0) { 821 monitor_printf(mon, "'commit' error for '%s': %s\n", device, 822 strerror(-ret)); 823 } 824 } 825 826 static void blockdev_do_action(int kind, void *data, Error **errp) 827 { 828 TransactionAction action; 829 TransactionActionList list; 830 831 action.kind = kind; 832 action.data = data; 833 list.value = &action; 834 list.next = NULL; 835 qmp_transaction(&list, errp); 836 } 837 838 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, 839 bool has_format, const char *format, 840 bool has_mode, enum NewImageMode mode, 841 Error **errp) 842 { 843 BlockdevSnapshot snapshot = { 844 .device = (char *) device, 845 .snapshot_file = (char *) snapshot_file, 846 .has_format = has_format, 847 .format = (char *) format, 848 .has_mode = has_mode, 849 .mode = mode, 850 }; 851 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, 852 &snapshot, errp); 853 } 854 855 void qmp_blockdev_snapshot_internal_sync(const char *device, 856 const char *name, 857 Error **errp) 858 { 859 BlockdevSnapshotInternal snapshot = { 860 .device = (char *) device, 861 .name = (char *) name 862 }; 863 864 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, 865 &snapshot, errp); 866 } 867 868 SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, 869 bool has_id, 870 const char *id, 871 bool has_name, 872 const char *name, 873 Error **errp) 874 { 875 BlockDriverState *bs = bdrv_find(device); 876 QEMUSnapshotInfo sn; 877 Error *local_err = NULL; 878 SnapshotInfo *info = NULL; 879 int ret; 880 881 if (!bs) { 882 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 883 return NULL; 884 } 885 886 if (!has_id) { 887 id = NULL; 888 } 889 890 if (!has_name) { 891 name = NULL; 892 } 893 894 if (!id && !name) { 895 error_setg(errp, "Name or id must be provided"); 896 return NULL; 897 } 898 899 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); 900 if (error_is_set(&local_err)) { 901 error_propagate(errp, local_err); 902 return NULL; 903 } 904 if (!ret) { 905 error_setg(errp, 906 "Snapshot with id '%s' and name '%s' does not exist on " 907 "device '%s'", 908 STR_OR_NULL(id), STR_OR_NULL(name), device); 909 return NULL; 910 } 911 912 bdrv_snapshot_delete(bs, id, name, &local_err); 913 if (error_is_set(&local_err)) { 914 error_propagate(errp, local_err); 915 return NULL; 916 } 917 918 info = g_malloc0(sizeof(SnapshotInfo)); 919 info->id = g_strdup(sn.id_str); 920 info->name = g_strdup(sn.name); 921 info->date_nsec = sn.date_nsec; 922 info->date_sec = sn.date_sec; 923 info->vm_state_size = sn.vm_state_size; 924 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; 925 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; 926 927 return info; 928 } 929 930 /* New and old BlockDriverState structs for group snapshots */ 931 932 typedef struct BlkTransactionState BlkTransactionState; 933 934 /* Only prepare() may fail. In a single transaction, only one of commit() or 935 abort() will be called, clean() will always be called if it present. */ 936 typedef struct BdrvActionOps { 937 /* Size of state struct, in bytes. */ 938 size_t instance_size; 939 /* Prepare the work, must NOT be NULL. */ 940 void (*prepare)(BlkTransactionState *common, Error **errp); 941 /* Commit the changes, can be NULL. */ 942 void (*commit)(BlkTransactionState *common); 943 /* Abort the changes on fail, can be NULL. */ 944 void (*abort)(BlkTransactionState *common); 945 /* Clean up resource in the end, can be NULL. */ 946 void (*clean)(BlkTransactionState *common); 947 } BdrvActionOps; 948 949 /* 950 * This structure must be arranged as first member in child type, assuming 951 * that compiler will also arrange it to the same address with parent instance. 952 * Later it will be used in free(). 953 */ 954 struct BlkTransactionState { 955 TransactionAction *action; 956 const BdrvActionOps *ops; 957 QSIMPLEQ_ENTRY(BlkTransactionState) entry; 958 }; 959 960 /* internal snapshot private data */ 961 typedef struct InternalSnapshotState { 962 BlkTransactionState common; 963 BlockDriverState *bs; 964 QEMUSnapshotInfo sn; 965 } InternalSnapshotState; 966 967 static void internal_snapshot_prepare(BlkTransactionState *common, 968 Error **errp) 969 { 970 const char *device; 971 const char *name; 972 BlockDriverState *bs; 973 QEMUSnapshotInfo old_sn, *sn; 974 bool ret; 975 qemu_timeval tv; 976 BlockdevSnapshotInternal *internal; 977 InternalSnapshotState *state; 978 int ret1; 979 980 g_assert(common->action->kind == 981 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); 982 internal = common->action->blockdev_snapshot_internal_sync; 983 state = DO_UPCAST(InternalSnapshotState, common, common); 984 985 /* 1. parse input */ 986 device = internal->device; 987 name = internal->name; 988 989 /* 2. check for validation */ 990 bs = bdrv_find(device); 991 if (!bs) { 992 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 993 return; 994 } 995 996 if (!bdrv_is_inserted(bs)) { 997 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 998 return; 999 } 1000 1001 if (bdrv_is_read_only(bs)) { 1002 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); 1003 return; 1004 } 1005 1006 if (!bdrv_can_snapshot(bs)) { 1007 error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, 1008 bs->drv->format_name, device, "internal snapshot"); 1009 return; 1010 } 1011 1012 if (!strlen(name)) { 1013 error_setg(errp, "Name is empty"); 1014 return; 1015 } 1016 1017 /* check whether a snapshot with name exist */ 1018 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, errp); 1019 if (error_is_set(errp)) { 1020 return; 1021 } else if (ret) { 1022 error_setg(errp, 1023 "Snapshot with name '%s' already exists on device '%s'", 1024 name, device); 1025 return; 1026 } 1027 1028 /* 3. take the snapshot */ 1029 sn = &state->sn; 1030 pstrcpy(sn->name, sizeof(sn->name), name); 1031 qemu_gettimeofday(&tv); 1032 sn->date_sec = tv.tv_sec; 1033 sn->date_nsec = tv.tv_usec * 1000; 1034 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); 1035 1036 ret1 = bdrv_snapshot_create(bs, sn); 1037 if (ret1 < 0) { 1038 error_setg_errno(errp, -ret1, 1039 "Failed to create snapshot '%s' on device '%s'", 1040 name, device); 1041 return; 1042 } 1043 1044 /* 4. succeed, mark a snapshot is created */ 1045 state->bs = bs; 1046 } 1047 1048 static void internal_snapshot_abort(BlkTransactionState *common) 1049 { 1050 InternalSnapshotState *state = 1051 DO_UPCAST(InternalSnapshotState, common, common); 1052 BlockDriverState *bs = state->bs; 1053 QEMUSnapshotInfo *sn = &state->sn; 1054 Error *local_error = NULL; 1055 1056 if (!bs) { 1057 return; 1058 } 1059 1060 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { 1061 error_report("Failed to delete snapshot with id '%s' and name '%s' on " 1062 "device '%s' in abort: %s", 1063 sn->id_str, 1064 sn->name, 1065 bdrv_get_device_name(bs), 1066 error_get_pretty(local_error)); 1067 error_free(local_error); 1068 } 1069 } 1070 1071 /* external snapshot private data */ 1072 typedef struct ExternalSnapshotState { 1073 BlkTransactionState common; 1074 BlockDriverState *old_bs; 1075 BlockDriverState *new_bs; 1076 } ExternalSnapshotState; 1077 1078 static void external_snapshot_prepare(BlkTransactionState *common, 1079 Error **errp) 1080 { 1081 BlockDriver *drv; 1082 int flags, ret; 1083 Error *local_err = NULL; 1084 const char *device; 1085 const char *new_image_file; 1086 const char *format = "qcow2"; 1087 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; 1088 ExternalSnapshotState *state = 1089 DO_UPCAST(ExternalSnapshotState, common, common); 1090 TransactionAction *action = common->action; 1091 1092 /* get parameters */ 1093 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); 1094 1095 device = action->blockdev_snapshot_sync->device; 1096 new_image_file = action->blockdev_snapshot_sync->snapshot_file; 1097 if (action->blockdev_snapshot_sync->has_format) { 1098 format = action->blockdev_snapshot_sync->format; 1099 } 1100 if (action->blockdev_snapshot_sync->has_mode) { 1101 mode = action->blockdev_snapshot_sync->mode; 1102 } 1103 1104 /* start processing */ 1105 drv = bdrv_find_format(format); 1106 if (!drv) { 1107 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1108 return; 1109 } 1110 1111 state->old_bs = bdrv_find(device); 1112 if (!state->old_bs) { 1113 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1114 return; 1115 } 1116 1117 if (!bdrv_is_inserted(state->old_bs)) { 1118 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1119 return; 1120 } 1121 1122 if (bdrv_in_use(state->old_bs)) { 1123 error_set(errp, QERR_DEVICE_IN_USE, device); 1124 return; 1125 } 1126 1127 if (!bdrv_is_read_only(state->old_bs)) { 1128 if (bdrv_flush(state->old_bs)) { 1129 error_set(errp, QERR_IO_ERROR); 1130 return; 1131 } 1132 } 1133 1134 flags = state->old_bs->open_flags; 1135 1136 /* create new image w/backing file */ 1137 if (mode != NEW_IMAGE_MODE_EXISTING) { 1138 bdrv_img_create(new_image_file, format, 1139 state->old_bs->filename, 1140 state->old_bs->drv->format_name, 1141 NULL, -1, flags, &local_err, false); 1142 if (error_is_set(&local_err)) { 1143 error_propagate(errp, local_err); 1144 return; 1145 } 1146 } 1147 1148 /* We will manually add the backing_hd field to the bs later */ 1149 state->new_bs = bdrv_new(""); 1150 /* TODO Inherit bs->options or only take explicit options with an 1151 * extended QMP command? */ 1152 ret = bdrv_open(state->new_bs, new_image_file, NULL, 1153 flags | BDRV_O_NO_BACKING, drv, &local_err); 1154 if (ret != 0) { 1155 error_propagate(errp, local_err); 1156 } 1157 } 1158 1159 static void external_snapshot_commit(BlkTransactionState *common) 1160 { 1161 ExternalSnapshotState *state = 1162 DO_UPCAST(ExternalSnapshotState, common, common); 1163 1164 /* This removes our old bs and adds the new bs */ 1165 bdrv_append(state->new_bs, state->old_bs); 1166 /* We don't need (or want) to use the transactional 1167 * bdrv_reopen_multiple() across all the entries at once, because we 1168 * don't want to abort all of them if one of them fails the reopen */ 1169 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, 1170 NULL); 1171 } 1172 1173 static void external_snapshot_abort(BlkTransactionState *common) 1174 { 1175 ExternalSnapshotState *state = 1176 DO_UPCAST(ExternalSnapshotState, common, common); 1177 if (state->new_bs) { 1178 bdrv_unref(state->new_bs); 1179 } 1180 } 1181 1182 typedef struct DriveBackupState { 1183 BlkTransactionState common; 1184 BlockDriverState *bs; 1185 BlockJob *job; 1186 } DriveBackupState; 1187 1188 static void drive_backup_prepare(BlkTransactionState *common, Error **errp) 1189 { 1190 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); 1191 DriveBackup *backup; 1192 Error *local_err = NULL; 1193 1194 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); 1195 backup = common->action->drive_backup; 1196 1197 qmp_drive_backup(backup->device, backup->target, 1198 backup->has_format, backup->format, 1199 backup->sync, 1200 backup->has_mode, backup->mode, 1201 backup->has_speed, backup->speed, 1202 backup->has_on_source_error, backup->on_source_error, 1203 backup->has_on_target_error, backup->on_target_error, 1204 &local_err); 1205 if (error_is_set(&local_err)) { 1206 error_propagate(errp, local_err); 1207 state->bs = NULL; 1208 state->job = NULL; 1209 return; 1210 } 1211 1212 state->bs = bdrv_find(backup->device); 1213 state->job = state->bs->job; 1214 } 1215 1216 static void drive_backup_abort(BlkTransactionState *common) 1217 { 1218 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); 1219 BlockDriverState *bs = state->bs; 1220 1221 /* Only cancel if it's the job we started */ 1222 if (bs && bs->job && bs->job == state->job) { 1223 block_job_cancel_sync(bs->job); 1224 } 1225 } 1226 1227 static void abort_prepare(BlkTransactionState *common, Error **errp) 1228 { 1229 error_setg(errp, "Transaction aborted using Abort action"); 1230 } 1231 1232 static void abort_commit(BlkTransactionState *common) 1233 { 1234 g_assert_not_reached(); /* this action never succeeds */ 1235 } 1236 1237 static const BdrvActionOps actions[] = { 1238 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { 1239 .instance_size = sizeof(ExternalSnapshotState), 1240 .prepare = external_snapshot_prepare, 1241 .commit = external_snapshot_commit, 1242 .abort = external_snapshot_abort, 1243 }, 1244 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { 1245 .instance_size = sizeof(DriveBackupState), 1246 .prepare = drive_backup_prepare, 1247 .abort = drive_backup_abort, 1248 }, 1249 [TRANSACTION_ACTION_KIND_ABORT] = { 1250 .instance_size = sizeof(BlkTransactionState), 1251 .prepare = abort_prepare, 1252 .commit = abort_commit, 1253 }, 1254 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { 1255 .instance_size = sizeof(InternalSnapshotState), 1256 .prepare = internal_snapshot_prepare, 1257 .abort = internal_snapshot_abort, 1258 }, 1259 }; 1260 1261 /* 1262 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail 1263 * then we do not pivot any of the devices in the group, and abandon the 1264 * snapshots 1265 */ 1266 void qmp_transaction(TransactionActionList *dev_list, Error **errp) 1267 { 1268 TransactionActionList *dev_entry = dev_list; 1269 BlkTransactionState *state, *next; 1270 Error *local_err = NULL; 1271 1272 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; 1273 QSIMPLEQ_INIT(&snap_bdrv_states); 1274 1275 /* drain all i/o before any snapshots */ 1276 bdrv_drain_all(); 1277 1278 /* We don't do anything in this loop that commits us to the snapshot */ 1279 while (NULL != dev_entry) { 1280 TransactionAction *dev_info = NULL; 1281 const BdrvActionOps *ops; 1282 1283 dev_info = dev_entry->value; 1284 dev_entry = dev_entry->next; 1285 1286 assert(dev_info->kind < ARRAY_SIZE(actions)); 1287 1288 ops = &actions[dev_info->kind]; 1289 assert(ops->instance_size > 0); 1290 1291 state = g_malloc0(ops->instance_size); 1292 state->ops = ops; 1293 state->action = dev_info; 1294 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); 1295 1296 state->ops->prepare(state, &local_err); 1297 if (error_is_set(&local_err)) { 1298 error_propagate(errp, local_err); 1299 goto delete_and_fail; 1300 } 1301 } 1302 1303 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { 1304 if (state->ops->commit) { 1305 state->ops->commit(state); 1306 } 1307 } 1308 1309 /* success */ 1310 goto exit; 1311 1312 delete_and_fail: 1313 /* 1314 * failure, and it is all-or-none; abandon each new bs, and keep using 1315 * the original bs for all images 1316 */ 1317 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { 1318 if (state->ops->abort) { 1319 state->ops->abort(state); 1320 } 1321 } 1322 exit: 1323 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { 1324 if (state->ops->clean) { 1325 state->ops->clean(state); 1326 } 1327 g_free(state); 1328 } 1329 } 1330 1331 1332 static void eject_device(BlockDriverState *bs, int force, Error **errp) 1333 { 1334 if (bdrv_in_use(bs)) { 1335 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 1336 return; 1337 } 1338 if (!bdrv_dev_has_removable_media(bs)) { 1339 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); 1340 return; 1341 } 1342 1343 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { 1344 bdrv_dev_eject_request(bs, force); 1345 if (!force) { 1346 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); 1347 return; 1348 } 1349 } 1350 1351 bdrv_close(bs); 1352 } 1353 1354 void qmp_eject(const char *device, bool has_force, bool force, Error **errp) 1355 { 1356 BlockDriverState *bs; 1357 1358 bs = bdrv_find(device); 1359 if (!bs) { 1360 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1361 return; 1362 } 1363 1364 eject_device(bs, force, errp); 1365 } 1366 1367 void qmp_block_passwd(const char *device, const char *password, Error **errp) 1368 { 1369 BlockDriverState *bs; 1370 int err; 1371 1372 bs = bdrv_find(device); 1373 if (!bs) { 1374 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1375 return; 1376 } 1377 1378 err = bdrv_set_key(bs, password); 1379 if (err == -EINVAL) { 1380 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); 1381 return; 1382 } else if (err < 0) { 1383 error_set(errp, QERR_INVALID_PASSWORD); 1384 return; 1385 } 1386 } 1387 1388 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, 1389 int bdrv_flags, BlockDriver *drv, 1390 const char *password, Error **errp) 1391 { 1392 Error *local_err = NULL; 1393 int ret; 1394 1395 ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv, &local_err); 1396 if (ret < 0) { 1397 error_propagate(errp, local_err); 1398 return; 1399 } 1400 1401 if (bdrv_key_required(bs)) { 1402 if (password) { 1403 if (bdrv_set_key(bs, password) < 0) { 1404 error_set(errp, QERR_INVALID_PASSWORD); 1405 } 1406 } else { 1407 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), 1408 bdrv_get_encrypted_filename(bs)); 1409 } 1410 } else if (password) { 1411 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); 1412 } 1413 } 1414 1415 void qmp_change_blockdev(const char *device, const char *filename, 1416 bool has_format, const char *format, Error **errp) 1417 { 1418 BlockDriverState *bs; 1419 BlockDriver *drv = NULL; 1420 int bdrv_flags; 1421 Error *err = NULL; 1422 1423 bs = bdrv_find(device); 1424 if (!bs) { 1425 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1426 return; 1427 } 1428 1429 if (format) { 1430 drv = bdrv_find_whitelisted_format(format, bs->read_only); 1431 if (!drv) { 1432 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1433 return; 1434 } 1435 } 1436 1437 eject_device(bs, 0, &err); 1438 if (error_is_set(&err)) { 1439 error_propagate(errp, err); 1440 return; 1441 } 1442 1443 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; 1444 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; 1445 1446 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); 1447 } 1448 1449 /* throttling disk I/O limits */ 1450 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, 1451 int64_t bps_wr, 1452 int64_t iops, 1453 int64_t iops_rd, 1454 int64_t iops_wr, 1455 bool has_bps_max, 1456 int64_t bps_max, 1457 bool has_bps_rd_max, 1458 int64_t bps_rd_max, 1459 bool has_bps_wr_max, 1460 int64_t bps_wr_max, 1461 bool has_iops_max, 1462 int64_t iops_max, 1463 bool has_iops_rd_max, 1464 int64_t iops_rd_max, 1465 bool has_iops_wr_max, 1466 int64_t iops_wr_max, 1467 bool has_iops_size, 1468 int64_t iops_size, Error **errp) 1469 { 1470 ThrottleConfig cfg; 1471 BlockDriverState *bs; 1472 1473 bs = bdrv_find(device); 1474 if (!bs) { 1475 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1476 return; 1477 } 1478 1479 memset(&cfg, 0, sizeof(cfg)); 1480 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps; 1481 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd; 1482 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr; 1483 1484 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops; 1485 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd; 1486 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr; 1487 1488 if (has_bps_max) { 1489 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max; 1490 } 1491 if (has_bps_rd_max) { 1492 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max; 1493 } 1494 if (has_bps_wr_max) { 1495 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max; 1496 } 1497 if (has_iops_max) { 1498 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max; 1499 } 1500 if (has_iops_rd_max) { 1501 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max; 1502 } 1503 if (has_iops_wr_max) { 1504 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max; 1505 } 1506 1507 if (has_iops_size) { 1508 cfg.op_size = iops_size; 1509 } 1510 1511 if (!check_throttle_config(&cfg, errp)) { 1512 return; 1513 } 1514 1515 if (!bs->io_limits_enabled && throttle_enabled(&cfg)) { 1516 bdrv_io_limits_enable(bs); 1517 } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) { 1518 bdrv_io_limits_disable(bs); 1519 } 1520 1521 if (bs->io_limits_enabled) { 1522 bdrv_set_io_limits(bs, &cfg); 1523 } 1524 } 1525 1526 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) 1527 { 1528 const char *id = qdict_get_str(qdict, "id"); 1529 BlockDriverState *bs; 1530 1531 bs = bdrv_find(id); 1532 if (!bs) { 1533 qerror_report(QERR_DEVICE_NOT_FOUND, id); 1534 return -1; 1535 } 1536 if (bdrv_in_use(bs)) { 1537 qerror_report(QERR_DEVICE_IN_USE, id); 1538 return -1; 1539 } 1540 1541 /* quiesce block driver; prevent further io */ 1542 bdrv_drain_all(); 1543 bdrv_flush(bs); 1544 bdrv_close(bs); 1545 1546 /* if we have a device attached to this BlockDriverState 1547 * then we need to make the drive anonymous until the device 1548 * can be removed. If this is a drive with no device backing 1549 * then we can just get rid of the block driver state right here. 1550 */ 1551 if (bdrv_get_attached_dev(bs)) { 1552 bdrv_make_anon(bs); 1553 1554 /* Further I/O must not pause the guest */ 1555 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, 1556 BLOCKDEV_ON_ERROR_REPORT); 1557 } else { 1558 drive_uninit(drive_get_by_blockdev(bs)); 1559 } 1560 1561 return 0; 1562 } 1563 1564 void qmp_block_resize(const char *device, int64_t size, Error **errp) 1565 { 1566 BlockDriverState *bs; 1567 int ret; 1568 1569 bs = bdrv_find(device); 1570 if (!bs) { 1571 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1572 return; 1573 } 1574 1575 if (size < 0) { 1576 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); 1577 return; 1578 } 1579 1580 /* complete all in-flight operations before resizing the device */ 1581 bdrv_drain_all(); 1582 1583 ret = bdrv_truncate(bs, size); 1584 switch (ret) { 1585 case 0: 1586 break; 1587 case -ENOMEDIUM: 1588 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1589 break; 1590 case -ENOTSUP: 1591 error_set(errp, QERR_UNSUPPORTED); 1592 break; 1593 case -EACCES: 1594 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); 1595 break; 1596 case -EBUSY: 1597 error_set(errp, QERR_DEVICE_IN_USE, device); 1598 break; 1599 default: 1600 error_setg_errno(errp, -ret, "Could not resize"); 1601 break; 1602 } 1603 } 1604 1605 static void block_job_cb(void *opaque, int ret) 1606 { 1607 BlockDriverState *bs = opaque; 1608 QObject *obj; 1609 1610 trace_block_job_cb(bs, bs->job, ret); 1611 1612 assert(bs->job); 1613 obj = qobject_from_block_job(bs->job); 1614 if (ret < 0) { 1615 QDict *dict = qobject_to_qdict(obj); 1616 qdict_put(dict, "error", qstring_from_str(strerror(-ret))); 1617 } 1618 1619 if (block_job_is_cancelled(bs->job)) { 1620 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); 1621 } else { 1622 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); 1623 } 1624 qobject_decref(obj); 1625 1626 bdrv_put_ref_bh_schedule(bs); 1627 } 1628 1629 void qmp_block_stream(const char *device, bool has_base, 1630 const char *base, bool has_speed, int64_t speed, 1631 bool has_on_error, BlockdevOnError on_error, 1632 Error **errp) 1633 { 1634 BlockDriverState *bs; 1635 BlockDriverState *base_bs = NULL; 1636 Error *local_err = NULL; 1637 1638 if (!has_on_error) { 1639 on_error = BLOCKDEV_ON_ERROR_REPORT; 1640 } 1641 1642 bs = bdrv_find(device); 1643 if (!bs) { 1644 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1645 return; 1646 } 1647 1648 if (base) { 1649 base_bs = bdrv_find_backing_image(bs, base); 1650 if (base_bs == NULL) { 1651 error_set(errp, QERR_BASE_NOT_FOUND, base); 1652 return; 1653 } 1654 } 1655 1656 stream_start(bs, base_bs, base, has_speed ? speed : 0, 1657 on_error, block_job_cb, bs, &local_err); 1658 if (error_is_set(&local_err)) { 1659 error_propagate(errp, local_err); 1660 return; 1661 } 1662 1663 trace_qmp_block_stream(bs, bs->job); 1664 } 1665 1666 void qmp_block_commit(const char *device, 1667 bool has_base, const char *base, const char *top, 1668 bool has_speed, int64_t speed, 1669 Error **errp) 1670 { 1671 BlockDriverState *bs; 1672 BlockDriverState *base_bs, *top_bs; 1673 Error *local_err = NULL; 1674 /* This will be part of the QMP command, if/when the 1675 * BlockdevOnError change for blkmirror makes it in 1676 */ 1677 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; 1678 1679 /* drain all i/o before commits */ 1680 bdrv_drain_all(); 1681 1682 bs = bdrv_find(device); 1683 if (!bs) { 1684 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1685 return; 1686 } 1687 1688 /* default top_bs is the active layer */ 1689 top_bs = bs; 1690 1691 if (top) { 1692 if (strcmp(bs->filename, top) != 0) { 1693 top_bs = bdrv_find_backing_image(bs, top); 1694 } 1695 } 1696 1697 if (top_bs == NULL) { 1698 error_setg(errp, "Top image file %s not found", top ? top : "NULL"); 1699 return; 1700 } 1701 1702 if (has_base && base) { 1703 base_bs = bdrv_find_backing_image(top_bs, base); 1704 } else { 1705 base_bs = bdrv_find_base(top_bs); 1706 } 1707 1708 if (base_bs == NULL) { 1709 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); 1710 return; 1711 } 1712 1713 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, 1714 &local_err); 1715 if (local_err != NULL) { 1716 error_propagate(errp, local_err); 1717 return; 1718 } 1719 } 1720 1721 void qmp_drive_backup(const char *device, const char *target, 1722 bool has_format, const char *format, 1723 enum MirrorSyncMode sync, 1724 bool has_mode, enum NewImageMode mode, 1725 bool has_speed, int64_t speed, 1726 bool has_on_source_error, BlockdevOnError on_source_error, 1727 bool has_on_target_error, BlockdevOnError on_target_error, 1728 Error **errp) 1729 { 1730 BlockDriverState *bs; 1731 BlockDriverState *target_bs; 1732 BlockDriverState *source = NULL; 1733 BlockDriver *drv = NULL; 1734 Error *local_err = NULL; 1735 int flags; 1736 int64_t size; 1737 int ret; 1738 1739 if (!has_speed) { 1740 speed = 0; 1741 } 1742 if (!has_on_source_error) { 1743 on_source_error = BLOCKDEV_ON_ERROR_REPORT; 1744 } 1745 if (!has_on_target_error) { 1746 on_target_error = BLOCKDEV_ON_ERROR_REPORT; 1747 } 1748 if (!has_mode) { 1749 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; 1750 } 1751 1752 bs = bdrv_find(device); 1753 if (!bs) { 1754 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1755 return; 1756 } 1757 1758 if (!bdrv_is_inserted(bs)) { 1759 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1760 return; 1761 } 1762 1763 if (!has_format) { 1764 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; 1765 } 1766 if (format) { 1767 drv = bdrv_find_format(format); 1768 if (!drv) { 1769 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1770 return; 1771 } 1772 } 1773 1774 if (bdrv_in_use(bs)) { 1775 error_set(errp, QERR_DEVICE_IN_USE, device); 1776 return; 1777 } 1778 1779 flags = bs->open_flags | BDRV_O_RDWR; 1780 1781 /* See if we have a backing HD we can use to create our new image 1782 * on top of. */ 1783 if (sync == MIRROR_SYNC_MODE_TOP) { 1784 source = bs->backing_hd; 1785 if (!source) { 1786 sync = MIRROR_SYNC_MODE_FULL; 1787 } 1788 } 1789 if (sync == MIRROR_SYNC_MODE_NONE) { 1790 source = bs; 1791 } 1792 1793 size = bdrv_getlength(bs); 1794 if (size < 0) { 1795 error_setg_errno(errp, -size, "bdrv_getlength failed"); 1796 return; 1797 } 1798 1799 if (mode != NEW_IMAGE_MODE_EXISTING) { 1800 assert(format && drv); 1801 if (source) { 1802 bdrv_img_create(target, format, source->filename, 1803 source->drv->format_name, NULL, 1804 size, flags, &local_err, false); 1805 } else { 1806 bdrv_img_create(target, format, NULL, NULL, NULL, 1807 size, flags, &local_err, false); 1808 } 1809 } 1810 1811 if (error_is_set(&local_err)) { 1812 error_propagate(errp, local_err); 1813 return; 1814 } 1815 1816 target_bs = bdrv_new(""); 1817 ret = bdrv_open(target_bs, target, NULL, flags, drv, &local_err); 1818 if (ret < 0) { 1819 bdrv_unref(target_bs); 1820 error_propagate(errp, local_err); 1821 return; 1822 } 1823 1824 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error, 1825 block_job_cb, bs, &local_err); 1826 if (local_err != NULL) { 1827 bdrv_unref(target_bs); 1828 error_propagate(errp, local_err); 1829 return; 1830 } 1831 } 1832 1833 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20) 1834 1835 void qmp_drive_mirror(const char *device, const char *target, 1836 bool has_format, const char *format, 1837 enum MirrorSyncMode sync, 1838 bool has_mode, enum NewImageMode mode, 1839 bool has_speed, int64_t speed, 1840 bool has_granularity, uint32_t granularity, 1841 bool has_buf_size, int64_t buf_size, 1842 bool has_on_source_error, BlockdevOnError on_source_error, 1843 bool has_on_target_error, BlockdevOnError on_target_error, 1844 Error **errp) 1845 { 1846 BlockDriverState *bs; 1847 BlockDriverState *source, *target_bs; 1848 BlockDriver *drv = NULL; 1849 Error *local_err = NULL; 1850 int flags; 1851 int64_t size; 1852 int ret; 1853 1854 if (!has_speed) { 1855 speed = 0; 1856 } 1857 if (!has_on_source_error) { 1858 on_source_error = BLOCKDEV_ON_ERROR_REPORT; 1859 } 1860 if (!has_on_target_error) { 1861 on_target_error = BLOCKDEV_ON_ERROR_REPORT; 1862 } 1863 if (!has_mode) { 1864 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; 1865 } 1866 if (!has_granularity) { 1867 granularity = 0; 1868 } 1869 if (!has_buf_size) { 1870 buf_size = DEFAULT_MIRROR_BUF_SIZE; 1871 } 1872 1873 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { 1874 error_set(errp, QERR_INVALID_PARAMETER, device); 1875 return; 1876 } 1877 if (granularity & (granularity - 1)) { 1878 error_set(errp, QERR_INVALID_PARAMETER, device); 1879 return; 1880 } 1881 1882 bs = bdrv_find(device); 1883 if (!bs) { 1884 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1885 return; 1886 } 1887 1888 if (!bdrv_is_inserted(bs)) { 1889 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1890 return; 1891 } 1892 1893 if (!has_format) { 1894 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; 1895 } 1896 if (format) { 1897 drv = bdrv_find_format(format); 1898 if (!drv) { 1899 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1900 return; 1901 } 1902 } 1903 1904 if (bdrv_in_use(bs)) { 1905 error_set(errp, QERR_DEVICE_IN_USE, device); 1906 return; 1907 } 1908 1909 flags = bs->open_flags | BDRV_O_RDWR; 1910 source = bs->backing_hd; 1911 if (!source && sync == MIRROR_SYNC_MODE_TOP) { 1912 sync = MIRROR_SYNC_MODE_FULL; 1913 } 1914 1915 size = bdrv_getlength(bs); 1916 if (size < 0) { 1917 error_setg_errno(errp, -size, "bdrv_getlength failed"); 1918 return; 1919 } 1920 1921 if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) { 1922 /* create new image w/o backing file */ 1923 assert(format && drv); 1924 bdrv_img_create(target, format, 1925 NULL, NULL, NULL, size, flags, &local_err, false); 1926 } else { 1927 switch (mode) { 1928 case NEW_IMAGE_MODE_EXISTING: 1929 ret = 0; 1930 break; 1931 case NEW_IMAGE_MODE_ABSOLUTE_PATHS: 1932 /* create new image with backing file */ 1933 bdrv_img_create(target, format, 1934 source->filename, 1935 source->drv->format_name, 1936 NULL, size, flags, &local_err, false); 1937 break; 1938 default: 1939 abort(); 1940 } 1941 } 1942 1943 if (error_is_set(&local_err)) { 1944 error_propagate(errp, local_err); 1945 return; 1946 } 1947 1948 /* Mirroring takes care of copy-on-write using the source's backing 1949 * file. 1950 */ 1951 target_bs = bdrv_new(""); 1952 ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv, 1953 &local_err); 1954 if (ret < 0) { 1955 bdrv_unref(target_bs); 1956 error_propagate(errp, local_err); 1957 return; 1958 } 1959 1960 mirror_start(bs, target_bs, speed, granularity, buf_size, sync, 1961 on_source_error, on_target_error, 1962 block_job_cb, bs, &local_err); 1963 if (local_err != NULL) { 1964 bdrv_unref(target_bs); 1965 error_propagate(errp, local_err); 1966 return; 1967 } 1968 } 1969 1970 static BlockJob *find_block_job(const char *device) 1971 { 1972 BlockDriverState *bs; 1973 1974 bs = bdrv_find(device); 1975 if (!bs || !bs->job) { 1976 return NULL; 1977 } 1978 return bs->job; 1979 } 1980 1981 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) 1982 { 1983 BlockJob *job = find_block_job(device); 1984 1985 if (!job) { 1986 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1987 return; 1988 } 1989 1990 block_job_set_speed(job, speed, errp); 1991 } 1992 1993 void qmp_block_job_cancel(const char *device, 1994 bool has_force, bool force, Error **errp) 1995 { 1996 BlockJob *job = find_block_job(device); 1997 1998 if (!has_force) { 1999 force = false; 2000 } 2001 2002 if (!job) { 2003 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 2004 return; 2005 } 2006 if (job->paused && !force) { 2007 error_set(errp, QERR_BLOCK_JOB_PAUSED, device); 2008 return; 2009 } 2010 2011 trace_qmp_block_job_cancel(job); 2012 block_job_cancel(job); 2013 } 2014 2015 void qmp_block_job_pause(const char *device, Error **errp) 2016 { 2017 BlockJob *job = find_block_job(device); 2018 2019 if (!job) { 2020 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 2021 return; 2022 } 2023 2024 trace_qmp_block_job_pause(job); 2025 block_job_pause(job); 2026 } 2027 2028 void qmp_block_job_resume(const char *device, Error **errp) 2029 { 2030 BlockJob *job = find_block_job(device); 2031 2032 if (!job) { 2033 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 2034 return; 2035 } 2036 2037 trace_qmp_block_job_resume(job); 2038 block_job_resume(job); 2039 } 2040 2041 void qmp_block_job_complete(const char *device, Error **errp) 2042 { 2043 BlockJob *job = find_block_job(device); 2044 2045 if (!job) { 2046 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 2047 return; 2048 } 2049 2050 trace_qmp_block_job_complete(job); 2051 block_job_complete(job, errp); 2052 } 2053 2054 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) 2055 { 2056 BlockJobInfoList **prev = opaque; 2057 BlockJob *job = bs->job; 2058 2059 if (job) { 2060 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); 2061 elem->value = block_job_query(bs->job); 2062 (*prev)->next = elem; 2063 *prev = elem; 2064 } 2065 } 2066 2067 BlockJobInfoList *qmp_query_block_jobs(Error **errp) 2068 { 2069 /* Dummy is a fake list element for holding the head pointer */ 2070 BlockJobInfoList dummy = {}; 2071 BlockJobInfoList *prev = &dummy; 2072 bdrv_iterate(do_qmp_query_block_jobs_one, &prev); 2073 return dummy.next; 2074 } 2075 2076 QemuOptsList qemu_common_drive_opts = { 2077 .name = "drive", 2078 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), 2079 .desc = { 2080 { 2081 .name = "bus", 2082 .type = QEMU_OPT_NUMBER, 2083 .help = "bus number", 2084 },{ 2085 .name = "unit", 2086 .type = QEMU_OPT_NUMBER, 2087 .help = "unit number (i.e. lun for scsi)", 2088 },{ 2089 .name = "if", 2090 .type = QEMU_OPT_STRING, 2091 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", 2092 },{ 2093 .name = "index", 2094 .type = QEMU_OPT_NUMBER, 2095 .help = "index number", 2096 },{ 2097 .name = "cyls", 2098 .type = QEMU_OPT_NUMBER, 2099 .help = "number of cylinders (ide disk geometry)", 2100 },{ 2101 .name = "heads", 2102 .type = QEMU_OPT_NUMBER, 2103 .help = "number of heads (ide disk geometry)", 2104 },{ 2105 .name = "secs", 2106 .type = QEMU_OPT_NUMBER, 2107 .help = "number of sectors (ide disk geometry)", 2108 },{ 2109 .name = "trans", 2110 .type = QEMU_OPT_STRING, 2111 .help = "chs translation (auto, lba. none)", 2112 },{ 2113 .name = "media", 2114 .type = QEMU_OPT_STRING, 2115 .help = "media type (disk, cdrom)", 2116 },{ 2117 .name = "snapshot", 2118 .type = QEMU_OPT_BOOL, 2119 .help = "enable/disable snapshot mode", 2120 },{ 2121 .name = "file", 2122 .type = QEMU_OPT_STRING, 2123 .help = "disk image", 2124 },{ 2125 .name = "discard", 2126 .type = QEMU_OPT_STRING, 2127 .help = "discard operation (ignore/off, unmap/on)", 2128 },{ 2129 .name = "cache.writeback", 2130 .type = QEMU_OPT_BOOL, 2131 .help = "enables writeback mode for any caches", 2132 },{ 2133 .name = "cache.direct", 2134 .type = QEMU_OPT_BOOL, 2135 .help = "enables use of O_DIRECT (bypass the host page cache)", 2136 },{ 2137 .name = "cache.no-flush", 2138 .type = QEMU_OPT_BOOL, 2139 .help = "ignore any flush requests for the device", 2140 },{ 2141 .name = "aio", 2142 .type = QEMU_OPT_STRING, 2143 .help = "host AIO implementation (threads, native)", 2144 },{ 2145 .name = "format", 2146 .type = QEMU_OPT_STRING, 2147 .help = "disk format (raw, qcow2, ...)", 2148 },{ 2149 .name = "serial", 2150 .type = QEMU_OPT_STRING, 2151 .help = "disk serial number", 2152 },{ 2153 .name = "rerror", 2154 .type = QEMU_OPT_STRING, 2155 .help = "read error action", 2156 },{ 2157 .name = "werror", 2158 .type = QEMU_OPT_STRING, 2159 .help = "write error action", 2160 },{ 2161 .name = "addr", 2162 .type = QEMU_OPT_STRING, 2163 .help = "pci address (virtio only)", 2164 },{ 2165 .name = "read-only", 2166 .type = QEMU_OPT_BOOL, 2167 .help = "open drive file as read-only", 2168 },{ 2169 .name = "throttling.iops-total", 2170 .type = QEMU_OPT_NUMBER, 2171 .help = "limit total I/O operations per second", 2172 },{ 2173 .name = "throttling.iops-read", 2174 .type = QEMU_OPT_NUMBER, 2175 .help = "limit read operations per second", 2176 },{ 2177 .name = "throttling.iops-write", 2178 .type = QEMU_OPT_NUMBER, 2179 .help = "limit write operations per second", 2180 },{ 2181 .name = "throttling.bps-total", 2182 .type = QEMU_OPT_NUMBER, 2183 .help = "limit total bytes per second", 2184 },{ 2185 .name = "throttling.bps-read", 2186 .type = QEMU_OPT_NUMBER, 2187 .help = "limit read bytes per second", 2188 },{ 2189 .name = "throttling.bps-write", 2190 .type = QEMU_OPT_NUMBER, 2191 .help = "limit write bytes per second", 2192 },{ 2193 .name = "throttling.iops-total-max", 2194 .type = QEMU_OPT_NUMBER, 2195 .help = "I/O operations burst", 2196 },{ 2197 .name = "throttling.iops-read-max", 2198 .type = QEMU_OPT_NUMBER, 2199 .help = "I/O operations read burst", 2200 },{ 2201 .name = "throttling.iops-write-max", 2202 .type = QEMU_OPT_NUMBER, 2203 .help = "I/O operations write burst", 2204 },{ 2205 .name = "throttling.bps-total-max", 2206 .type = QEMU_OPT_NUMBER, 2207 .help = "total bytes burst", 2208 },{ 2209 .name = "throttling.bps-read-max", 2210 .type = QEMU_OPT_NUMBER, 2211 .help = "total bytes read burst", 2212 },{ 2213 .name = "throttling.bps-write-max", 2214 .type = QEMU_OPT_NUMBER, 2215 .help = "total bytes write burst", 2216 },{ 2217 .name = "throttling.iops-size", 2218 .type = QEMU_OPT_NUMBER, 2219 .help = "when limiting by iops max size of an I/O in bytes", 2220 },{ 2221 .name = "copy-on-read", 2222 .type = QEMU_OPT_BOOL, 2223 .help = "copy read data from backing file into image file", 2224 },{ 2225 .name = "boot", 2226 .type = QEMU_OPT_BOOL, 2227 .help = "(deprecated, ignored)", 2228 }, 2229 { /* end of list */ } 2230 }, 2231 }; 2232 2233 QemuOptsList qemu_drive_opts = { 2234 .name = "drive", 2235 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), 2236 .desc = { 2237 /* 2238 * no elements => accept any params 2239 * validation will happen later 2240 */ 2241 { /* end of list */ } 2242 }, 2243 }; 2244