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 10 #include "sysemu/blockdev.h" 11 #include "hw/block-common.h" 12 #include "block/blockjob.h" 13 #include "monitor/monitor.h" 14 #include "qapi/qmp/qerror.h" 15 #include "qemu/option.h" 16 #include "qemu/config-file.h" 17 #include "qapi/qmp/types.h" 18 #include "sysemu/sysemu.h" 19 #include "block/block_int.h" 20 #include "qmp-commands.h" 21 #include "trace.h" 22 #include "sysemu/arch_init.h" 23 24 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); 25 26 static const char *const if_name[IF_COUNT] = { 27 [IF_NONE] = "none", 28 [IF_IDE] = "ide", 29 [IF_SCSI] = "scsi", 30 [IF_FLOPPY] = "floppy", 31 [IF_PFLASH] = "pflash", 32 [IF_MTD] = "mtd", 33 [IF_SD] = "sd", 34 [IF_VIRTIO] = "virtio", 35 [IF_XEN] = "xen", 36 }; 37 38 static const int if_max_devs[IF_COUNT] = { 39 /* 40 * Do not change these numbers! They govern how drive option 41 * index maps to unit and bus. That mapping is ABI. 42 * 43 * All controllers used to imlement if=T drives need to support 44 * if_max_devs[T] units, for any T with if_max_devs[T] != 0. 45 * Otherwise, some index values map to "impossible" bus, unit 46 * values. 47 * 48 * For instance, if you change [IF_SCSI] to 255, -drive 49 * if=scsi,index=12 no longer means bus=1,unit=5, but 50 * bus=0,unit=12. With an lsi53c895a controller (7 units max), 51 * the drive can't be set up. Regression. 52 */ 53 [IF_IDE] = 2, 54 [IF_SCSI] = 7, 55 }; 56 57 /* 58 * We automatically delete the drive when a device using it gets 59 * unplugged. Questionable feature, but we can't just drop it. 60 * Device models call blockdev_mark_auto_del() to schedule the 61 * automatic deletion, and generic qdev code calls blockdev_auto_del() 62 * when deletion is actually safe. 63 */ 64 void blockdev_mark_auto_del(BlockDriverState *bs) 65 { 66 DriveInfo *dinfo = drive_get_by_blockdev(bs); 67 68 if (bs->job) { 69 block_job_cancel(bs->job); 70 } 71 if (dinfo) { 72 dinfo->auto_del = 1; 73 } 74 } 75 76 void blockdev_auto_del(BlockDriverState *bs) 77 { 78 DriveInfo *dinfo = drive_get_by_blockdev(bs); 79 80 if (dinfo && dinfo->auto_del) { 81 drive_put_ref(dinfo); 82 } 83 } 84 85 static int drive_index_to_bus_id(BlockInterfaceType type, int index) 86 { 87 int max_devs = if_max_devs[type]; 88 return max_devs ? index / max_devs : 0; 89 } 90 91 static int drive_index_to_unit_id(BlockInterfaceType type, int index) 92 { 93 int max_devs = if_max_devs[type]; 94 return max_devs ? index % max_devs : index; 95 } 96 97 QemuOpts *drive_def(const char *optstr) 98 { 99 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); 100 } 101 102 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, 103 const char *optstr) 104 { 105 QemuOpts *opts; 106 char buf[32]; 107 108 opts = drive_def(optstr); 109 if (!opts) { 110 return NULL; 111 } 112 if (type != IF_DEFAULT) { 113 qemu_opt_set(opts, "if", if_name[type]); 114 } 115 if (index >= 0) { 116 snprintf(buf, sizeof(buf), "%d", index); 117 qemu_opt_set(opts, "index", buf); 118 } 119 if (file) 120 qemu_opt_set(opts, "file", file); 121 return opts; 122 } 123 124 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) 125 { 126 DriveInfo *dinfo; 127 128 /* seek interface, bus and unit */ 129 130 QTAILQ_FOREACH(dinfo, &drives, next) { 131 if (dinfo->type == type && 132 dinfo->bus == bus && 133 dinfo->unit == unit) 134 return dinfo; 135 } 136 137 return NULL; 138 } 139 140 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) 141 { 142 return drive_get(type, 143 drive_index_to_bus_id(type, index), 144 drive_index_to_unit_id(type, index)); 145 } 146 147 int drive_get_max_bus(BlockInterfaceType type) 148 { 149 int max_bus; 150 DriveInfo *dinfo; 151 152 max_bus = -1; 153 QTAILQ_FOREACH(dinfo, &drives, next) { 154 if(dinfo->type == type && 155 dinfo->bus > max_bus) 156 max_bus = dinfo->bus; 157 } 158 return max_bus; 159 } 160 161 /* Get a block device. This should only be used for single-drive devices 162 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the 163 appropriate bus. */ 164 DriveInfo *drive_get_next(BlockInterfaceType type) 165 { 166 static int next_block_unit[IF_COUNT]; 167 168 return drive_get(type, 0, next_block_unit[type]++); 169 } 170 171 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) 172 { 173 DriveInfo *dinfo; 174 175 QTAILQ_FOREACH(dinfo, &drives, next) { 176 if (dinfo->bdrv == bs) { 177 return dinfo; 178 } 179 } 180 return NULL; 181 } 182 183 static void bdrv_format_print(void *opaque, const char *name) 184 { 185 error_printf(" %s", name); 186 } 187 188 static void drive_uninit(DriveInfo *dinfo) 189 { 190 qemu_opts_del(dinfo->opts); 191 bdrv_delete(dinfo->bdrv); 192 g_free(dinfo->id); 193 QTAILQ_REMOVE(&drives, dinfo, next); 194 g_free(dinfo); 195 } 196 197 void drive_put_ref(DriveInfo *dinfo) 198 { 199 assert(dinfo->refcount); 200 if (--dinfo->refcount == 0) { 201 drive_uninit(dinfo); 202 } 203 } 204 205 void drive_get_ref(DriveInfo *dinfo) 206 { 207 dinfo->refcount++; 208 } 209 210 typedef struct { 211 QEMUBH *bh; 212 DriveInfo *dinfo; 213 } DrivePutRefBH; 214 215 static void drive_put_ref_bh(void *opaque) 216 { 217 DrivePutRefBH *s = opaque; 218 219 drive_put_ref(s->dinfo); 220 qemu_bh_delete(s->bh); 221 g_free(s); 222 } 223 224 /* 225 * Release a drive reference in a BH 226 * 227 * It is not possible to use drive_put_ref() from a callback function when the 228 * callers still need the drive. In such cases we schedule a BH to release the 229 * reference. 230 */ 231 static void drive_put_ref_bh_schedule(DriveInfo *dinfo) 232 { 233 DrivePutRefBH *s; 234 235 s = g_new(DrivePutRefBH, 1); 236 s->bh = qemu_bh_new(drive_put_ref_bh, s); 237 s->dinfo = dinfo; 238 qemu_bh_schedule(s->bh); 239 } 240 241 static int parse_block_error_action(const char *buf, bool is_read) 242 { 243 if (!strcmp(buf, "ignore")) { 244 return BLOCKDEV_ON_ERROR_IGNORE; 245 } else if (!is_read && !strcmp(buf, "enospc")) { 246 return BLOCKDEV_ON_ERROR_ENOSPC; 247 } else if (!strcmp(buf, "stop")) { 248 return BLOCKDEV_ON_ERROR_STOP; 249 } else if (!strcmp(buf, "report")) { 250 return BLOCKDEV_ON_ERROR_REPORT; 251 } else { 252 error_report("'%s' invalid %s error action", 253 buf, is_read ? "read" : "write"); 254 return -1; 255 } 256 } 257 258 static bool do_check_io_limits(BlockIOLimit *io_limits) 259 { 260 bool bps_flag; 261 bool iops_flag; 262 263 assert(io_limits); 264 265 bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0) 266 && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0) 267 || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0)); 268 iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0) 269 && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0) 270 || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0)); 271 if (bps_flag || iops_flag) { 272 return false; 273 } 274 275 return true; 276 } 277 278 DriveInfo *drive_init(QemuOpts *opts, BlockInterfaceType block_default_type) 279 { 280 const char *buf; 281 const char *file = NULL; 282 const char *serial; 283 const char *mediastr = ""; 284 BlockInterfaceType type; 285 enum { MEDIA_DISK, MEDIA_CDROM } media; 286 int bus_id, unit_id; 287 int cyls, heads, secs, translation; 288 BlockDriver *drv = NULL; 289 int max_devs; 290 int index; 291 int ro = 0; 292 int bdrv_flags = 0; 293 int on_read_error, on_write_error; 294 const char *devaddr; 295 DriveInfo *dinfo; 296 BlockIOLimit io_limits; 297 int snapshot = 0; 298 bool copy_on_read; 299 int ret; 300 301 translation = BIOS_ATA_TRANSLATION_AUTO; 302 media = MEDIA_DISK; 303 304 /* extract parameters */ 305 bus_id = qemu_opt_get_number(opts, "bus", 0); 306 unit_id = qemu_opt_get_number(opts, "unit", -1); 307 index = qemu_opt_get_number(opts, "index", -1); 308 309 cyls = qemu_opt_get_number(opts, "cyls", 0); 310 heads = qemu_opt_get_number(opts, "heads", 0); 311 secs = qemu_opt_get_number(opts, "secs", 0); 312 313 snapshot = qemu_opt_get_bool(opts, "snapshot", 0); 314 ro = qemu_opt_get_bool(opts, "readonly", 0); 315 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); 316 317 file = qemu_opt_get(opts, "file"); 318 serial = qemu_opt_get(opts, "serial"); 319 320 if ((buf = qemu_opt_get(opts, "if")) != NULL) { 321 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) 322 ; 323 if (type == IF_COUNT) { 324 error_report("unsupported bus type '%s'", buf); 325 return NULL; 326 } 327 } else { 328 type = block_default_type; 329 } 330 331 max_devs = if_max_devs[type]; 332 333 if (cyls || heads || secs) { 334 if (cyls < 1) { 335 error_report("invalid physical cyls number"); 336 return NULL; 337 } 338 if (heads < 1) { 339 error_report("invalid physical heads number"); 340 return NULL; 341 } 342 if (secs < 1) { 343 error_report("invalid physical secs number"); 344 return NULL; 345 } 346 } 347 348 if ((buf = qemu_opt_get(opts, "trans")) != NULL) { 349 if (!cyls) { 350 error_report("'%s' trans must be used with cyls, heads and secs", 351 buf); 352 return NULL; 353 } 354 if (!strcmp(buf, "none")) 355 translation = BIOS_ATA_TRANSLATION_NONE; 356 else if (!strcmp(buf, "lba")) 357 translation = BIOS_ATA_TRANSLATION_LBA; 358 else if (!strcmp(buf, "auto")) 359 translation = BIOS_ATA_TRANSLATION_AUTO; 360 else { 361 error_report("'%s' invalid translation type", buf); 362 return NULL; 363 } 364 } 365 366 if ((buf = qemu_opt_get(opts, "media")) != NULL) { 367 if (!strcmp(buf, "disk")) { 368 media = MEDIA_DISK; 369 } else if (!strcmp(buf, "cdrom")) { 370 if (cyls || secs || heads) { 371 error_report("CHS can't be set with media=%s", buf); 372 return NULL; 373 } 374 media = MEDIA_CDROM; 375 } else { 376 error_report("'%s' invalid media", buf); 377 return NULL; 378 } 379 } 380 381 bdrv_flags |= BDRV_O_CACHE_WB; 382 if ((buf = qemu_opt_get(opts, "cache")) != NULL) { 383 if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { 384 error_report("invalid cache option"); 385 return NULL; 386 } 387 } 388 389 #ifdef CONFIG_LINUX_AIO 390 if ((buf = qemu_opt_get(opts, "aio")) != NULL) { 391 if (!strcmp(buf, "native")) { 392 bdrv_flags |= BDRV_O_NATIVE_AIO; 393 } else if (!strcmp(buf, "threads")) { 394 /* this is the default */ 395 } else { 396 error_report("invalid aio option"); 397 return NULL; 398 } 399 } 400 #endif 401 402 if ((buf = qemu_opt_get(opts, "format")) != NULL) { 403 if (is_help_option(buf)) { 404 error_printf("Supported formats:"); 405 bdrv_iterate_format(bdrv_format_print, NULL); 406 error_printf("\n"); 407 return NULL; 408 } 409 drv = bdrv_find_whitelisted_format(buf); 410 if (!drv) { 411 error_report("'%s' invalid format", buf); 412 return NULL; 413 } 414 } 415 416 /* disk I/O throttling */ 417 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = 418 qemu_opt_get_number(opts, "bps", 0); 419 io_limits.bps[BLOCK_IO_LIMIT_READ] = 420 qemu_opt_get_number(opts, "bps_rd", 0); 421 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = 422 qemu_opt_get_number(opts, "bps_wr", 0); 423 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = 424 qemu_opt_get_number(opts, "iops", 0); 425 io_limits.iops[BLOCK_IO_LIMIT_READ] = 426 qemu_opt_get_number(opts, "iops_rd", 0); 427 io_limits.iops[BLOCK_IO_LIMIT_WRITE] = 428 qemu_opt_get_number(opts, "iops_wr", 0); 429 430 if (!do_check_io_limits(&io_limits)) { 431 error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " 432 "cannot be used at the same time"); 433 return NULL; 434 } 435 436 if (qemu_opt_get(opts, "boot") != NULL) { 437 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " 438 "ignored. Future versions will reject this parameter. Please " 439 "update your scripts.\n"); 440 } 441 442 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; 443 if ((buf = qemu_opt_get(opts, "werror")) != NULL) { 444 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { 445 error_report("werror is not supported by this bus type"); 446 return NULL; 447 } 448 449 on_write_error = parse_block_error_action(buf, 0); 450 if (on_write_error < 0) { 451 return NULL; 452 } 453 } 454 455 on_read_error = BLOCKDEV_ON_ERROR_REPORT; 456 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { 457 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) { 458 error_report("rerror is not supported by this bus type"); 459 return NULL; 460 } 461 462 on_read_error = parse_block_error_action(buf, 1); 463 if (on_read_error < 0) { 464 return NULL; 465 } 466 } 467 468 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { 469 if (type != IF_VIRTIO) { 470 error_report("addr is not supported by this bus type"); 471 return NULL; 472 } 473 } 474 475 /* compute bus and unit according index */ 476 477 if (index != -1) { 478 if (bus_id != 0 || unit_id != -1) { 479 error_report("index cannot be used with bus and unit"); 480 return NULL; 481 } 482 bus_id = drive_index_to_bus_id(type, index); 483 unit_id = drive_index_to_unit_id(type, index); 484 } 485 486 /* if user doesn't specify a unit_id, 487 * try to find the first free 488 */ 489 490 if (unit_id == -1) { 491 unit_id = 0; 492 while (drive_get(type, bus_id, unit_id) != NULL) { 493 unit_id++; 494 if (max_devs && unit_id >= max_devs) { 495 unit_id -= max_devs; 496 bus_id++; 497 } 498 } 499 } 500 501 /* check unit id */ 502 503 if (max_devs && unit_id >= max_devs) { 504 error_report("unit %d too big (max is %d)", 505 unit_id, max_devs - 1); 506 return NULL; 507 } 508 509 /* 510 * catch multiple definitions 511 */ 512 513 if (drive_get(type, bus_id, unit_id) != NULL) { 514 error_report("drive with bus=%d, unit=%d (index=%d) exists", 515 bus_id, unit_id, index); 516 return NULL; 517 } 518 519 /* init */ 520 521 dinfo = g_malloc0(sizeof(*dinfo)); 522 if ((buf = qemu_opts_id(opts)) != NULL) { 523 dinfo->id = g_strdup(buf); 524 } else { 525 /* no id supplied -> create one */ 526 dinfo->id = g_malloc0(32); 527 if (type == IF_IDE || type == IF_SCSI) 528 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; 529 if (max_devs) 530 snprintf(dinfo->id, 32, "%s%i%s%i", 531 if_name[type], bus_id, mediastr, unit_id); 532 else 533 snprintf(dinfo->id, 32, "%s%s%i", 534 if_name[type], mediastr, unit_id); 535 } 536 dinfo->bdrv = bdrv_new(dinfo->id); 537 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; 538 dinfo->bdrv->read_only = ro; 539 dinfo->devaddr = devaddr; 540 dinfo->type = type; 541 dinfo->bus = bus_id; 542 dinfo->unit = unit_id; 543 dinfo->cyls = cyls; 544 dinfo->heads = heads; 545 dinfo->secs = secs; 546 dinfo->trans = translation; 547 dinfo->opts = opts; 548 dinfo->refcount = 1; 549 dinfo->serial = serial; 550 QTAILQ_INSERT_TAIL(&drives, dinfo, next); 551 552 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); 553 554 /* disk I/O throttling */ 555 bdrv_set_io_limits(dinfo->bdrv, &io_limits); 556 557 switch(type) { 558 case IF_IDE: 559 case IF_SCSI: 560 case IF_XEN: 561 case IF_NONE: 562 dinfo->media_cd = media == MEDIA_CDROM; 563 break; 564 case IF_SD: 565 case IF_FLOPPY: 566 case IF_PFLASH: 567 case IF_MTD: 568 break; 569 case IF_VIRTIO: 570 /* add virtio block device */ 571 opts = qemu_opts_create_nofail(qemu_find_opts("device")); 572 if (arch_type == QEMU_ARCH_S390X) { 573 qemu_opt_set(opts, "driver", "virtio-blk-s390"); 574 } else { 575 qemu_opt_set(opts, "driver", "virtio-blk-pci"); 576 } 577 qemu_opt_set(opts, "drive", dinfo->id); 578 if (devaddr) 579 qemu_opt_set(opts, "addr", devaddr); 580 break; 581 default: 582 abort(); 583 } 584 if (!file || !*file) { 585 return dinfo; 586 } 587 if (snapshot) { 588 /* always use cache=unsafe with snapshot */ 589 bdrv_flags &= ~BDRV_O_CACHE_MASK; 590 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); 591 } 592 593 if (copy_on_read) { 594 bdrv_flags |= BDRV_O_COPY_ON_READ; 595 } 596 597 if (runstate_check(RUN_STATE_INMIGRATE)) { 598 bdrv_flags |= BDRV_O_INCOMING; 599 } 600 601 if (media == MEDIA_CDROM) { 602 /* CDROM is fine for any interface, don't check. */ 603 ro = 1; 604 } else if (ro == 1) { 605 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && 606 type != IF_NONE && type != IF_PFLASH) { 607 error_report("readonly not supported by this bus type"); 608 goto err; 609 } 610 } 611 612 bdrv_flags |= ro ? 0 : BDRV_O_RDWR; 613 614 if (ro && copy_on_read) { 615 error_report("warning: disabling copy_on_read on readonly drive"); 616 } 617 618 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); 619 if (ret < 0) { 620 if (ret == -EMEDIUMTYPE) { 621 error_report("could not open disk image %s: not in %s format", 622 file, drv->format_name); 623 } else { 624 error_report("could not open disk image %s: %s", 625 file, strerror(-ret)); 626 } 627 goto err; 628 } 629 630 if (bdrv_key_required(dinfo->bdrv)) 631 autostart = 0; 632 return dinfo; 633 634 err: 635 bdrv_delete(dinfo->bdrv); 636 g_free(dinfo->id); 637 QTAILQ_REMOVE(&drives, dinfo, next); 638 g_free(dinfo); 639 return NULL; 640 } 641 642 void do_commit(Monitor *mon, const QDict *qdict) 643 { 644 const char *device = qdict_get_str(qdict, "device"); 645 BlockDriverState *bs; 646 int ret; 647 648 if (!strcmp(device, "all")) { 649 ret = bdrv_commit_all(); 650 } else { 651 bs = bdrv_find(device); 652 if (!bs) { 653 monitor_printf(mon, "Device '%s' not found\n", device); 654 return; 655 } 656 ret = bdrv_commit(bs); 657 } 658 if (ret < 0) { 659 monitor_printf(mon, "'commit' error for '%s': %s\n", device, 660 strerror(-ret)); 661 } 662 } 663 664 static void blockdev_do_action(int kind, void *data, Error **errp) 665 { 666 BlockdevAction action; 667 BlockdevActionList list; 668 669 action.kind = kind; 670 action.data = data; 671 list.value = &action; 672 list.next = NULL; 673 qmp_transaction(&list, errp); 674 } 675 676 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, 677 bool has_format, const char *format, 678 bool has_mode, enum NewImageMode mode, 679 Error **errp) 680 { 681 BlockdevSnapshot snapshot = { 682 .device = (char *) device, 683 .snapshot_file = (char *) snapshot_file, 684 .has_format = has_format, 685 .format = (char *) format, 686 .has_mode = has_mode, 687 .mode = mode, 688 }; 689 blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot, 690 errp); 691 } 692 693 694 /* New and old BlockDriverState structs for group snapshots */ 695 typedef struct BlkTransactionStates { 696 BlockDriverState *old_bs; 697 BlockDriverState *new_bs; 698 QSIMPLEQ_ENTRY(BlkTransactionStates) entry; 699 } BlkTransactionStates; 700 701 /* 702 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail 703 * then we do not pivot any of the devices in the group, and abandon the 704 * snapshots 705 */ 706 void qmp_transaction(BlockdevActionList *dev_list, Error **errp) 707 { 708 int ret = 0; 709 BlockdevActionList *dev_entry = dev_list; 710 BlkTransactionStates *states, *next; 711 Error *local_err = NULL; 712 713 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states; 714 QSIMPLEQ_INIT(&snap_bdrv_states); 715 716 /* drain all i/o before any snapshots */ 717 bdrv_drain_all(); 718 719 /* We don't do anything in this loop that commits us to the snapshot */ 720 while (NULL != dev_entry) { 721 BlockdevAction *dev_info = NULL; 722 BlockDriver *proto_drv; 723 BlockDriver *drv; 724 int flags; 725 enum NewImageMode mode; 726 const char *new_image_file; 727 const char *device; 728 const char *format = "qcow2"; 729 730 dev_info = dev_entry->value; 731 dev_entry = dev_entry->next; 732 733 states = g_malloc0(sizeof(BlkTransactionStates)); 734 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry); 735 736 switch (dev_info->kind) { 737 case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: 738 device = dev_info->blockdev_snapshot_sync->device; 739 if (!dev_info->blockdev_snapshot_sync->has_mode) { 740 dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; 741 } 742 new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file; 743 if (dev_info->blockdev_snapshot_sync->has_format) { 744 format = dev_info->blockdev_snapshot_sync->format; 745 } 746 mode = dev_info->blockdev_snapshot_sync->mode; 747 break; 748 default: 749 abort(); 750 } 751 752 drv = bdrv_find_format(format); 753 if (!drv) { 754 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 755 goto delete_and_fail; 756 } 757 758 states->old_bs = bdrv_find(device); 759 if (!states->old_bs) { 760 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 761 goto delete_and_fail; 762 } 763 764 if (!bdrv_is_inserted(states->old_bs)) { 765 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 766 goto delete_and_fail; 767 } 768 769 if (bdrv_in_use(states->old_bs)) { 770 error_set(errp, QERR_DEVICE_IN_USE, device); 771 goto delete_and_fail; 772 } 773 774 if (!bdrv_is_read_only(states->old_bs)) { 775 if (bdrv_flush(states->old_bs)) { 776 error_set(errp, QERR_IO_ERROR); 777 goto delete_and_fail; 778 } 779 } 780 781 flags = states->old_bs->open_flags; 782 783 proto_drv = bdrv_find_protocol(new_image_file); 784 if (!proto_drv) { 785 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 786 goto delete_and_fail; 787 } 788 789 /* create new image w/backing file */ 790 if (mode != NEW_IMAGE_MODE_EXISTING) { 791 bdrv_img_create(new_image_file, format, 792 states->old_bs->filename, 793 states->old_bs->drv->format_name, 794 NULL, -1, flags, &local_err); 795 if (error_is_set(&local_err)) { 796 error_propagate(errp, local_err); 797 goto delete_and_fail; 798 } 799 } 800 801 /* We will manually add the backing_hd field to the bs later */ 802 states->new_bs = bdrv_new(""); 803 ret = bdrv_open(states->new_bs, new_image_file, 804 flags | BDRV_O_NO_BACKING, drv); 805 if (ret != 0) { 806 error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); 807 goto delete_and_fail; 808 } 809 } 810 811 812 /* Now we are going to do the actual pivot. Everything up to this point 813 * is reversible, but we are committed at this point */ 814 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { 815 /* This removes our old bs from the bdrv_states, and adds the new bs */ 816 bdrv_append(states->new_bs, states->old_bs); 817 /* We don't need (or want) to use the transactional 818 * bdrv_reopen_multiple() across all the entries at once, because we 819 * don't want to abort all of them if one of them fails the reopen */ 820 bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR, 821 NULL); 822 } 823 824 /* success */ 825 goto exit; 826 827 delete_and_fail: 828 /* 829 * failure, and it is all-or-none; abandon each new bs, and keep using 830 * the original bs for all images 831 */ 832 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { 833 if (states->new_bs) { 834 bdrv_delete(states->new_bs); 835 } 836 } 837 exit: 838 QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) { 839 g_free(states); 840 } 841 } 842 843 844 static void eject_device(BlockDriverState *bs, int force, Error **errp) 845 { 846 if (bdrv_in_use(bs)) { 847 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 848 return; 849 } 850 if (!bdrv_dev_has_removable_media(bs)) { 851 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); 852 return; 853 } 854 855 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { 856 bdrv_dev_eject_request(bs, force); 857 if (!force) { 858 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); 859 return; 860 } 861 } 862 863 bdrv_close(bs); 864 } 865 866 void qmp_eject(const char *device, bool has_force, bool force, Error **errp) 867 { 868 BlockDriverState *bs; 869 870 bs = bdrv_find(device); 871 if (!bs) { 872 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 873 return; 874 } 875 876 eject_device(bs, force, errp); 877 } 878 879 void qmp_block_passwd(const char *device, const char *password, Error **errp) 880 { 881 BlockDriverState *bs; 882 int err; 883 884 bs = bdrv_find(device); 885 if (!bs) { 886 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 887 return; 888 } 889 890 err = bdrv_set_key(bs, password); 891 if (err == -EINVAL) { 892 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); 893 return; 894 } else if (err < 0) { 895 error_set(errp, QERR_INVALID_PASSWORD); 896 return; 897 } 898 } 899 900 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, 901 int bdrv_flags, BlockDriver *drv, 902 const char *password, Error **errp) 903 { 904 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { 905 error_set(errp, QERR_OPEN_FILE_FAILED, filename); 906 return; 907 } 908 909 if (bdrv_key_required(bs)) { 910 if (password) { 911 if (bdrv_set_key(bs, password) < 0) { 912 error_set(errp, QERR_INVALID_PASSWORD); 913 } 914 } else { 915 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), 916 bdrv_get_encrypted_filename(bs)); 917 } 918 } else if (password) { 919 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); 920 } 921 } 922 923 void qmp_change_blockdev(const char *device, const char *filename, 924 bool has_format, const char *format, Error **errp) 925 { 926 BlockDriverState *bs; 927 BlockDriver *drv = NULL; 928 int bdrv_flags; 929 Error *err = NULL; 930 931 bs = bdrv_find(device); 932 if (!bs) { 933 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 934 return; 935 } 936 937 if (format) { 938 drv = bdrv_find_whitelisted_format(format); 939 if (!drv) { 940 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 941 return; 942 } 943 } 944 945 eject_device(bs, 0, &err); 946 if (error_is_set(&err)) { 947 error_propagate(errp, err); 948 return; 949 } 950 951 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; 952 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; 953 954 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); 955 } 956 957 /* throttling disk I/O limits */ 958 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, 959 int64_t bps_wr, int64_t iops, int64_t iops_rd, 960 int64_t iops_wr, Error **errp) 961 { 962 BlockIOLimit io_limits; 963 BlockDriverState *bs; 964 965 bs = bdrv_find(device); 966 if (!bs) { 967 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 968 return; 969 } 970 971 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; 972 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; 973 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; 974 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; 975 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; 976 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; 977 978 if (!do_check_io_limits(&io_limits)) { 979 error_set(errp, QERR_INVALID_PARAMETER_COMBINATION); 980 return; 981 } 982 983 bs->io_limits = io_limits; 984 bs->slice_time = BLOCK_IO_SLICE_TIME; 985 986 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { 987 bdrv_io_limits_enable(bs); 988 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { 989 bdrv_io_limits_disable(bs); 990 } else { 991 if (bs->block_timer) { 992 qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); 993 } 994 } 995 } 996 997 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) 998 { 999 const char *id = qdict_get_str(qdict, "id"); 1000 BlockDriverState *bs; 1001 1002 bs = bdrv_find(id); 1003 if (!bs) { 1004 qerror_report(QERR_DEVICE_NOT_FOUND, id); 1005 return -1; 1006 } 1007 if (bdrv_in_use(bs)) { 1008 qerror_report(QERR_DEVICE_IN_USE, id); 1009 return -1; 1010 } 1011 1012 /* quiesce block driver; prevent further io */ 1013 bdrv_drain_all(); 1014 bdrv_flush(bs); 1015 bdrv_close(bs); 1016 1017 /* if we have a device attached to this BlockDriverState 1018 * then we need to make the drive anonymous until the device 1019 * can be removed. If this is a drive with no device backing 1020 * then we can just get rid of the block driver state right here. 1021 */ 1022 if (bdrv_get_attached_dev(bs)) { 1023 bdrv_make_anon(bs); 1024 } else { 1025 drive_uninit(drive_get_by_blockdev(bs)); 1026 } 1027 1028 return 0; 1029 } 1030 1031 void qmp_block_resize(const char *device, int64_t size, Error **errp) 1032 { 1033 BlockDriverState *bs; 1034 1035 bs = bdrv_find(device); 1036 if (!bs) { 1037 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1038 return; 1039 } 1040 1041 if (size < 0) { 1042 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); 1043 return; 1044 } 1045 1046 switch (bdrv_truncate(bs, size)) { 1047 case 0: 1048 break; 1049 case -ENOMEDIUM: 1050 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1051 break; 1052 case -ENOTSUP: 1053 error_set(errp, QERR_UNSUPPORTED); 1054 break; 1055 case -EACCES: 1056 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); 1057 break; 1058 case -EBUSY: 1059 error_set(errp, QERR_DEVICE_IN_USE, device); 1060 break; 1061 default: 1062 error_set(errp, QERR_UNDEFINED_ERROR); 1063 break; 1064 } 1065 } 1066 1067 static void block_job_cb(void *opaque, int ret) 1068 { 1069 BlockDriverState *bs = opaque; 1070 QObject *obj; 1071 1072 trace_block_job_cb(bs, bs->job, ret); 1073 1074 assert(bs->job); 1075 obj = qobject_from_block_job(bs->job); 1076 if (ret < 0) { 1077 QDict *dict = qobject_to_qdict(obj); 1078 qdict_put(dict, "error", qstring_from_str(strerror(-ret))); 1079 } 1080 1081 if (block_job_is_cancelled(bs->job)) { 1082 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); 1083 } else { 1084 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); 1085 } 1086 qobject_decref(obj); 1087 1088 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); 1089 } 1090 1091 void qmp_block_stream(const char *device, bool has_base, 1092 const char *base, bool has_speed, int64_t speed, 1093 bool has_on_error, BlockdevOnError on_error, 1094 Error **errp) 1095 { 1096 BlockDriverState *bs; 1097 BlockDriverState *base_bs = NULL; 1098 Error *local_err = NULL; 1099 1100 if (!has_on_error) { 1101 on_error = BLOCKDEV_ON_ERROR_REPORT; 1102 } 1103 1104 bs = bdrv_find(device); 1105 if (!bs) { 1106 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1107 return; 1108 } 1109 1110 if (base) { 1111 base_bs = bdrv_find_backing_image(bs, base); 1112 if (base_bs == NULL) { 1113 error_set(errp, QERR_BASE_NOT_FOUND, base); 1114 return; 1115 } 1116 } 1117 1118 stream_start(bs, base_bs, base, has_speed ? speed : 0, 1119 on_error, block_job_cb, bs, &local_err); 1120 if (error_is_set(&local_err)) { 1121 error_propagate(errp, local_err); 1122 return; 1123 } 1124 1125 /* Grab a reference so hotplug does not delete the BlockDriverState from 1126 * underneath us. 1127 */ 1128 drive_get_ref(drive_get_by_blockdev(bs)); 1129 1130 trace_qmp_block_stream(bs, bs->job); 1131 } 1132 1133 void qmp_block_commit(const char *device, 1134 bool has_base, const char *base, const char *top, 1135 bool has_speed, int64_t speed, 1136 Error **errp) 1137 { 1138 BlockDriverState *bs; 1139 BlockDriverState *base_bs, *top_bs; 1140 Error *local_err = NULL; 1141 /* This will be part of the QMP command, if/when the 1142 * BlockdevOnError change for blkmirror makes it in 1143 */ 1144 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; 1145 1146 /* drain all i/o before commits */ 1147 bdrv_drain_all(); 1148 1149 bs = bdrv_find(device); 1150 if (!bs) { 1151 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1152 return; 1153 } 1154 1155 /* default top_bs is the active layer */ 1156 top_bs = bs; 1157 1158 if (top) { 1159 if (strcmp(bs->filename, top) != 0) { 1160 top_bs = bdrv_find_backing_image(bs, top); 1161 } 1162 } 1163 1164 if (top_bs == NULL) { 1165 error_setg(errp, "Top image file %s not found", top ? top : "NULL"); 1166 return; 1167 } 1168 1169 if (has_base && base) { 1170 base_bs = bdrv_find_backing_image(top_bs, base); 1171 } else { 1172 base_bs = bdrv_find_base(top_bs); 1173 } 1174 1175 if (base_bs == NULL) { 1176 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); 1177 return; 1178 } 1179 1180 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, 1181 &local_err); 1182 if (local_err != NULL) { 1183 error_propagate(errp, local_err); 1184 return; 1185 } 1186 /* Grab a reference so hotplug does not delete the BlockDriverState from 1187 * underneath us. 1188 */ 1189 drive_get_ref(drive_get_by_blockdev(bs)); 1190 } 1191 1192 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20) 1193 1194 void qmp_drive_mirror(const char *device, const char *target, 1195 bool has_format, const char *format, 1196 enum MirrorSyncMode sync, 1197 bool has_mode, enum NewImageMode mode, 1198 bool has_speed, int64_t speed, 1199 bool has_granularity, uint32_t granularity, 1200 bool has_buf_size, int64_t buf_size, 1201 bool has_on_source_error, BlockdevOnError on_source_error, 1202 bool has_on_target_error, BlockdevOnError on_target_error, 1203 Error **errp) 1204 { 1205 BlockDriverState *bs; 1206 BlockDriverState *source, *target_bs; 1207 BlockDriver *proto_drv; 1208 BlockDriver *drv = NULL; 1209 Error *local_err = NULL; 1210 int flags; 1211 uint64_t size; 1212 int ret; 1213 1214 if (!has_speed) { 1215 speed = 0; 1216 } 1217 if (!has_on_source_error) { 1218 on_source_error = BLOCKDEV_ON_ERROR_REPORT; 1219 } 1220 if (!has_on_target_error) { 1221 on_target_error = BLOCKDEV_ON_ERROR_REPORT; 1222 } 1223 if (!has_mode) { 1224 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; 1225 } 1226 if (!has_granularity) { 1227 granularity = 0; 1228 } 1229 if (!has_buf_size) { 1230 buf_size = DEFAULT_MIRROR_BUF_SIZE; 1231 } 1232 1233 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { 1234 error_set(errp, QERR_INVALID_PARAMETER, device); 1235 return; 1236 } 1237 if (granularity & (granularity - 1)) { 1238 error_set(errp, QERR_INVALID_PARAMETER, device); 1239 return; 1240 } 1241 1242 bs = bdrv_find(device); 1243 if (!bs) { 1244 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1245 return; 1246 } 1247 1248 if (!bdrv_is_inserted(bs)) { 1249 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1250 return; 1251 } 1252 1253 if (!has_format) { 1254 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; 1255 } 1256 if (format) { 1257 drv = bdrv_find_format(format); 1258 if (!drv) { 1259 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1260 return; 1261 } 1262 } 1263 1264 if (bdrv_in_use(bs)) { 1265 error_set(errp, QERR_DEVICE_IN_USE, device); 1266 return; 1267 } 1268 1269 flags = bs->open_flags | BDRV_O_RDWR; 1270 source = bs->backing_hd; 1271 if (!source && sync == MIRROR_SYNC_MODE_TOP) { 1272 sync = MIRROR_SYNC_MODE_FULL; 1273 } 1274 1275 proto_drv = bdrv_find_protocol(target); 1276 if (!proto_drv) { 1277 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1278 return; 1279 } 1280 1281 bdrv_get_geometry(bs, &size); 1282 size *= 512; 1283 if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) { 1284 /* create new image w/o backing file */ 1285 assert(format && drv); 1286 bdrv_img_create(target, format, 1287 NULL, NULL, NULL, size, flags, &local_err); 1288 } else { 1289 switch (mode) { 1290 case NEW_IMAGE_MODE_EXISTING: 1291 ret = 0; 1292 break; 1293 case NEW_IMAGE_MODE_ABSOLUTE_PATHS: 1294 /* create new image with backing file */ 1295 bdrv_img_create(target, format, 1296 source->filename, 1297 source->drv->format_name, 1298 NULL, size, flags, &local_err); 1299 break; 1300 default: 1301 abort(); 1302 } 1303 } 1304 1305 if (error_is_set(&local_err)) { 1306 error_propagate(errp, local_err); 1307 return; 1308 } 1309 1310 /* Mirroring takes care of copy-on-write using the source's backing 1311 * file. 1312 */ 1313 target_bs = bdrv_new(""); 1314 ret = bdrv_open(target_bs, target, flags | BDRV_O_NO_BACKING, drv); 1315 1316 if (ret < 0) { 1317 bdrv_delete(target_bs); 1318 error_set(errp, QERR_OPEN_FILE_FAILED, target); 1319 return; 1320 } 1321 1322 mirror_start(bs, target_bs, speed, granularity, buf_size, sync, 1323 on_source_error, on_target_error, 1324 block_job_cb, bs, &local_err); 1325 if (local_err != NULL) { 1326 bdrv_delete(target_bs); 1327 error_propagate(errp, local_err); 1328 return; 1329 } 1330 1331 /* Grab a reference so hotplug does not delete the BlockDriverState from 1332 * underneath us. 1333 */ 1334 drive_get_ref(drive_get_by_blockdev(bs)); 1335 } 1336 1337 static BlockJob *find_block_job(const char *device) 1338 { 1339 BlockDriverState *bs; 1340 1341 bs = bdrv_find(device); 1342 if (!bs || !bs->job) { 1343 return NULL; 1344 } 1345 return bs->job; 1346 } 1347 1348 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) 1349 { 1350 BlockJob *job = find_block_job(device); 1351 1352 if (!job) { 1353 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1354 return; 1355 } 1356 1357 block_job_set_speed(job, speed, errp); 1358 } 1359 1360 void qmp_block_job_cancel(const char *device, 1361 bool has_force, bool force, Error **errp) 1362 { 1363 BlockJob *job = find_block_job(device); 1364 1365 if (!has_force) { 1366 force = false; 1367 } 1368 1369 if (!job) { 1370 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1371 return; 1372 } 1373 if (job->paused && !force) { 1374 error_set(errp, QERR_BLOCK_JOB_PAUSED, device); 1375 return; 1376 } 1377 1378 trace_qmp_block_job_cancel(job); 1379 block_job_cancel(job); 1380 } 1381 1382 void qmp_block_job_pause(const char *device, Error **errp) 1383 { 1384 BlockJob *job = find_block_job(device); 1385 1386 if (!job) { 1387 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1388 return; 1389 } 1390 1391 trace_qmp_block_job_pause(job); 1392 block_job_pause(job); 1393 } 1394 1395 void qmp_block_job_resume(const char *device, Error **errp) 1396 { 1397 BlockJob *job = find_block_job(device); 1398 1399 if (!job) { 1400 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1401 return; 1402 } 1403 1404 trace_qmp_block_job_resume(job); 1405 block_job_resume(job); 1406 } 1407 1408 void qmp_block_job_complete(const char *device, Error **errp) 1409 { 1410 BlockJob *job = find_block_job(device); 1411 1412 if (!job) { 1413 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1414 return; 1415 } 1416 1417 trace_qmp_block_job_complete(job); 1418 block_job_complete(job, errp); 1419 } 1420 1421 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) 1422 { 1423 BlockJobInfoList **prev = opaque; 1424 BlockJob *job = bs->job; 1425 1426 if (job) { 1427 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); 1428 elem->value = block_job_query(bs->job); 1429 (*prev)->next = elem; 1430 *prev = elem; 1431 } 1432 } 1433 1434 BlockJobInfoList *qmp_query_block_jobs(Error **errp) 1435 { 1436 /* Dummy is a fake list element for holding the head pointer */ 1437 BlockJobInfoList dummy = {}; 1438 BlockJobInfoList *prev = &dummy; 1439 bdrv_iterate(do_qmp_query_block_jobs_one, &prev); 1440 return dummy.next; 1441 } 1442 1443 QemuOptsList qemu_drive_opts = { 1444 .name = "drive", 1445 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), 1446 .desc = { 1447 { 1448 .name = "bus", 1449 .type = QEMU_OPT_NUMBER, 1450 .help = "bus number", 1451 },{ 1452 .name = "unit", 1453 .type = QEMU_OPT_NUMBER, 1454 .help = "unit number (i.e. lun for scsi)", 1455 },{ 1456 .name = "if", 1457 .type = QEMU_OPT_STRING, 1458 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", 1459 },{ 1460 .name = "index", 1461 .type = QEMU_OPT_NUMBER, 1462 .help = "index number", 1463 },{ 1464 .name = "cyls", 1465 .type = QEMU_OPT_NUMBER, 1466 .help = "number of cylinders (ide disk geometry)", 1467 },{ 1468 .name = "heads", 1469 .type = QEMU_OPT_NUMBER, 1470 .help = "number of heads (ide disk geometry)", 1471 },{ 1472 .name = "secs", 1473 .type = QEMU_OPT_NUMBER, 1474 .help = "number of sectors (ide disk geometry)", 1475 },{ 1476 .name = "trans", 1477 .type = QEMU_OPT_STRING, 1478 .help = "chs translation (auto, lba. none)", 1479 },{ 1480 .name = "media", 1481 .type = QEMU_OPT_STRING, 1482 .help = "media type (disk, cdrom)", 1483 },{ 1484 .name = "snapshot", 1485 .type = QEMU_OPT_BOOL, 1486 .help = "enable/disable snapshot mode", 1487 },{ 1488 .name = "file", 1489 .type = QEMU_OPT_STRING, 1490 .help = "disk image", 1491 },{ 1492 .name = "cache", 1493 .type = QEMU_OPT_STRING, 1494 .help = "host cache usage (none, writeback, writethrough, " 1495 "directsync, unsafe)", 1496 },{ 1497 .name = "aio", 1498 .type = QEMU_OPT_STRING, 1499 .help = "host AIO implementation (threads, native)", 1500 },{ 1501 .name = "format", 1502 .type = QEMU_OPT_STRING, 1503 .help = "disk format (raw, qcow2, ...)", 1504 },{ 1505 .name = "serial", 1506 .type = QEMU_OPT_STRING, 1507 .help = "disk serial number", 1508 },{ 1509 .name = "rerror", 1510 .type = QEMU_OPT_STRING, 1511 .help = "read error action", 1512 },{ 1513 .name = "werror", 1514 .type = QEMU_OPT_STRING, 1515 .help = "write error action", 1516 },{ 1517 .name = "addr", 1518 .type = QEMU_OPT_STRING, 1519 .help = "pci address (virtio only)", 1520 },{ 1521 .name = "readonly", 1522 .type = QEMU_OPT_BOOL, 1523 .help = "open drive file as read-only", 1524 },{ 1525 .name = "iops", 1526 .type = QEMU_OPT_NUMBER, 1527 .help = "limit total I/O operations per second", 1528 },{ 1529 .name = "iops_rd", 1530 .type = QEMU_OPT_NUMBER, 1531 .help = "limit read operations per second", 1532 },{ 1533 .name = "iops_wr", 1534 .type = QEMU_OPT_NUMBER, 1535 .help = "limit write operations per second", 1536 },{ 1537 .name = "bps", 1538 .type = QEMU_OPT_NUMBER, 1539 .help = "limit total bytes per second", 1540 },{ 1541 .name = "bps_rd", 1542 .type = QEMU_OPT_NUMBER, 1543 .help = "limit read bytes per second", 1544 },{ 1545 .name = "bps_wr", 1546 .type = QEMU_OPT_NUMBER, 1547 .help = "limit write bytes per second", 1548 },{ 1549 .name = "copy-on-read", 1550 .type = QEMU_OPT_BOOL, 1551 .help = "copy read data from backing file into image file", 1552 },{ 1553 .name = "boot", 1554 .type = QEMU_OPT_BOOL, 1555 .help = "(deprecated, ignored)", 1556 }, 1557 { /* end of list */ } 1558 }, 1559 }; 1560