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, Error **errp) 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 error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " 273 "cannot be used at the same time"); 274 return false; 275 } 276 277 if (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 || 278 io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 || 279 io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 || 280 io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 || 281 io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 || 282 io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) { 283 error_setg(errp, "bps and iops values must be 0 or greater"); 284 return false; 285 } 286 287 return true; 288 } 289 290 DriveInfo *drive_init(QemuOpts *opts, BlockInterfaceType block_default_type) 291 { 292 const char *buf; 293 const char *file = NULL; 294 const char *serial; 295 const char *mediastr = ""; 296 BlockInterfaceType type; 297 enum { MEDIA_DISK, MEDIA_CDROM } media; 298 int bus_id, unit_id; 299 int cyls, heads, secs, translation; 300 BlockDriver *drv = NULL; 301 int max_devs; 302 int index; 303 int ro = 0; 304 int bdrv_flags = 0; 305 int on_read_error, on_write_error; 306 const char *devaddr; 307 DriveInfo *dinfo; 308 BlockIOLimit io_limits; 309 int snapshot = 0; 310 bool copy_on_read; 311 int ret; 312 Error *error = NULL; 313 314 translation = BIOS_ATA_TRANSLATION_AUTO; 315 media = MEDIA_DISK; 316 317 /* extract parameters */ 318 bus_id = qemu_opt_get_number(opts, "bus", 0); 319 unit_id = qemu_opt_get_number(opts, "unit", -1); 320 index = qemu_opt_get_number(opts, "index", -1); 321 322 cyls = qemu_opt_get_number(opts, "cyls", 0); 323 heads = qemu_opt_get_number(opts, "heads", 0); 324 secs = qemu_opt_get_number(opts, "secs", 0); 325 326 snapshot = qemu_opt_get_bool(opts, "snapshot", 0); 327 ro = qemu_opt_get_bool(opts, "readonly", 0); 328 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); 329 330 file = qemu_opt_get(opts, "file"); 331 serial = qemu_opt_get(opts, "serial"); 332 333 if ((buf = qemu_opt_get(opts, "if")) != NULL) { 334 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) 335 ; 336 if (type == IF_COUNT) { 337 error_report("unsupported bus type '%s'", buf); 338 return NULL; 339 } 340 } else { 341 type = block_default_type; 342 } 343 344 max_devs = if_max_devs[type]; 345 346 if (cyls || heads || secs) { 347 if (cyls < 1) { 348 error_report("invalid physical cyls number"); 349 return NULL; 350 } 351 if (heads < 1) { 352 error_report("invalid physical heads number"); 353 return NULL; 354 } 355 if (secs < 1) { 356 error_report("invalid physical secs number"); 357 return NULL; 358 } 359 } 360 361 if ((buf = qemu_opt_get(opts, "trans")) != NULL) { 362 if (!cyls) { 363 error_report("'%s' trans must be used with cyls, heads and secs", 364 buf); 365 return NULL; 366 } 367 if (!strcmp(buf, "none")) 368 translation = BIOS_ATA_TRANSLATION_NONE; 369 else if (!strcmp(buf, "lba")) 370 translation = BIOS_ATA_TRANSLATION_LBA; 371 else if (!strcmp(buf, "auto")) 372 translation = BIOS_ATA_TRANSLATION_AUTO; 373 else { 374 error_report("'%s' invalid translation type", buf); 375 return NULL; 376 } 377 } 378 379 if ((buf = qemu_opt_get(opts, "media")) != NULL) { 380 if (!strcmp(buf, "disk")) { 381 media = MEDIA_DISK; 382 } else if (!strcmp(buf, "cdrom")) { 383 if (cyls || secs || heads) { 384 error_report("CHS can't be set with media=%s", buf); 385 return NULL; 386 } 387 media = MEDIA_CDROM; 388 } else { 389 error_report("'%s' invalid media", buf); 390 return NULL; 391 } 392 } 393 394 if ((buf = qemu_opt_get(opts, "discard")) != NULL) { 395 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { 396 error_report("invalid discard option"); 397 return NULL; 398 } 399 } 400 401 bdrv_flags |= BDRV_O_CACHE_WB; 402 if ((buf = qemu_opt_get(opts, "cache")) != NULL) { 403 if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { 404 error_report("invalid cache option"); 405 return NULL; 406 } 407 } 408 409 #ifdef CONFIG_LINUX_AIO 410 if ((buf = qemu_opt_get(opts, "aio")) != NULL) { 411 if (!strcmp(buf, "native")) { 412 bdrv_flags |= BDRV_O_NATIVE_AIO; 413 } else if (!strcmp(buf, "threads")) { 414 /* this is the default */ 415 } else { 416 error_report("invalid aio option"); 417 return NULL; 418 } 419 } 420 #endif 421 422 if ((buf = qemu_opt_get(opts, "format")) != NULL) { 423 if (is_help_option(buf)) { 424 error_printf("Supported formats:"); 425 bdrv_iterate_format(bdrv_format_print, NULL); 426 error_printf("\n"); 427 return NULL; 428 } 429 drv = bdrv_find_whitelisted_format(buf); 430 if (!drv) { 431 error_report("'%s' invalid format", buf); 432 return NULL; 433 } 434 } 435 436 /* disk I/O throttling */ 437 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = 438 qemu_opt_get_number(opts, "bps", 0); 439 io_limits.bps[BLOCK_IO_LIMIT_READ] = 440 qemu_opt_get_number(opts, "bps_rd", 0); 441 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = 442 qemu_opt_get_number(opts, "bps_wr", 0); 443 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = 444 qemu_opt_get_number(opts, "iops", 0); 445 io_limits.iops[BLOCK_IO_LIMIT_READ] = 446 qemu_opt_get_number(opts, "iops_rd", 0); 447 io_limits.iops[BLOCK_IO_LIMIT_WRITE] = 448 qemu_opt_get_number(opts, "iops_wr", 0); 449 450 if (!do_check_io_limits(&io_limits, &error)) { 451 error_report("%s", error_get_pretty(error)); 452 error_free(error); 453 return NULL; 454 } 455 456 if (qemu_opt_get(opts, "boot") != NULL) { 457 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " 458 "ignored. Future versions will reject this parameter. Please " 459 "update your scripts.\n"); 460 } 461 462 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; 463 if ((buf = qemu_opt_get(opts, "werror")) != NULL) { 464 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { 465 error_report("werror is not supported by this bus type"); 466 return NULL; 467 } 468 469 on_write_error = parse_block_error_action(buf, 0); 470 if (on_write_error < 0) { 471 return NULL; 472 } 473 } 474 475 on_read_error = BLOCKDEV_ON_ERROR_REPORT; 476 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { 477 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) { 478 error_report("rerror is not supported by this bus type"); 479 return NULL; 480 } 481 482 on_read_error = parse_block_error_action(buf, 1); 483 if (on_read_error < 0) { 484 return NULL; 485 } 486 } 487 488 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { 489 if (type != IF_VIRTIO) { 490 error_report("addr is not supported by this bus type"); 491 return NULL; 492 } 493 } 494 495 /* compute bus and unit according index */ 496 497 if (index != -1) { 498 if (bus_id != 0 || unit_id != -1) { 499 error_report("index cannot be used with bus and unit"); 500 return NULL; 501 } 502 bus_id = drive_index_to_bus_id(type, index); 503 unit_id = drive_index_to_unit_id(type, index); 504 } 505 506 /* if user doesn't specify a unit_id, 507 * try to find the first free 508 */ 509 510 if (unit_id == -1) { 511 unit_id = 0; 512 while (drive_get(type, bus_id, unit_id) != NULL) { 513 unit_id++; 514 if (max_devs && unit_id >= max_devs) { 515 unit_id -= max_devs; 516 bus_id++; 517 } 518 } 519 } 520 521 /* check unit id */ 522 523 if (max_devs && unit_id >= max_devs) { 524 error_report("unit %d too big (max is %d)", 525 unit_id, max_devs - 1); 526 return NULL; 527 } 528 529 /* 530 * catch multiple definitions 531 */ 532 533 if (drive_get(type, bus_id, unit_id) != NULL) { 534 error_report("drive with bus=%d, unit=%d (index=%d) exists", 535 bus_id, unit_id, index); 536 return NULL; 537 } 538 539 /* init */ 540 541 dinfo = g_malloc0(sizeof(*dinfo)); 542 if ((buf = qemu_opts_id(opts)) != NULL) { 543 dinfo->id = g_strdup(buf); 544 } else { 545 /* no id supplied -> create one */ 546 dinfo->id = g_malloc0(32); 547 if (type == IF_IDE || type == IF_SCSI) 548 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; 549 if (max_devs) 550 snprintf(dinfo->id, 32, "%s%i%s%i", 551 if_name[type], bus_id, mediastr, unit_id); 552 else 553 snprintf(dinfo->id, 32, "%s%s%i", 554 if_name[type], mediastr, unit_id); 555 } 556 dinfo->bdrv = bdrv_new(dinfo->id); 557 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; 558 dinfo->bdrv->read_only = ro; 559 dinfo->devaddr = devaddr; 560 dinfo->type = type; 561 dinfo->bus = bus_id; 562 dinfo->unit = unit_id; 563 dinfo->cyls = cyls; 564 dinfo->heads = heads; 565 dinfo->secs = secs; 566 dinfo->trans = translation; 567 dinfo->opts = opts; 568 dinfo->refcount = 1; 569 dinfo->serial = serial; 570 QTAILQ_INSERT_TAIL(&drives, dinfo, next); 571 572 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); 573 574 /* disk I/O throttling */ 575 bdrv_set_io_limits(dinfo->bdrv, &io_limits); 576 577 switch(type) { 578 case IF_IDE: 579 case IF_SCSI: 580 case IF_XEN: 581 case IF_NONE: 582 dinfo->media_cd = media == MEDIA_CDROM; 583 break; 584 case IF_SD: 585 case IF_FLOPPY: 586 case IF_PFLASH: 587 case IF_MTD: 588 break; 589 case IF_VIRTIO: 590 /* add virtio block device */ 591 opts = qemu_opts_create_nofail(qemu_find_opts("device")); 592 if (arch_type == QEMU_ARCH_S390X) { 593 qemu_opt_set(opts, "driver", "virtio-blk-s390"); 594 } else { 595 qemu_opt_set(opts, "driver", "virtio-blk-pci"); 596 } 597 qemu_opt_set(opts, "drive", dinfo->id); 598 if (devaddr) 599 qemu_opt_set(opts, "addr", devaddr); 600 break; 601 default: 602 abort(); 603 } 604 if (!file || !*file) { 605 return dinfo; 606 } 607 if (snapshot) { 608 /* always use cache=unsafe with snapshot */ 609 bdrv_flags &= ~BDRV_O_CACHE_MASK; 610 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); 611 } 612 613 if (copy_on_read) { 614 bdrv_flags |= BDRV_O_COPY_ON_READ; 615 } 616 617 if (runstate_check(RUN_STATE_INMIGRATE)) { 618 bdrv_flags |= BDRV_O_INCOMING; 619 } 620 621 if (media == MEDIA_CDROM) { 622 /* CDROM is fine for any interface, don't check. */ 623 ro = 1; 624 } else if (ro == 1) { 625 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && 626 type != IF_NONE && type != IF_PFLASH) { 627 error_report("readonly not supported by this bus type"); 628 goto err; 629 } 630 } 631 632 bdrv_flags |= ro ? 0 : BDRV_O_RDWR; 633 634 if (ro && copy_on_read) { 635 error_report("warning: disabling copy_on_read on readonly drive"); 636 } 637 638 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); 639 if (ret < 0) { 640 if (ret == -EMEDIUMTYPE) { 641 error_report("could not open disk image %s: not in %s format", 642 file, drv->format_name); 643 } else { 644 error_report("could not open disk image %s: %s", 645 file, strerror(-ret)); 646 } 647 goto err; 648 } 649 650 if (bdrv_key_required(dinfo->bdrv)) 651 autostart = 0; 652 return dinfo; 653 654 err: 655 bdrv_delete(dinfo->bdrv); 656 g_free(dinfo->id); 657 QTAILQ_REMOVE(&drives, dinfo, next); 658 g_free(dinfo); 659 return NULL; 660 } 661 662 void do_commit(Monitor *mon, const QDict *qdict) 663 { 664 const char *device = qdict_get_str(qdict, "device"); 665 BlockDriverState *bs; 666 int ret; 667 668 if (!strcmp(device, "all")) { 669 ret = bdrv_commit_all(); 670 } else { 671 bs = bdrv_find(device); 672 if (!bs) { 673 monitor_printf(mon, "Device '%s' not found\n", device); 674 return; 675 } 676 ret = bdrv_commit(bs); 677 } 678 if (ret < 0) { 679 monitor_printf(mon, "'commit' error for '%s': %s\n", device, 680 strerror(-ret)); 681 } 682 } 683 684 static void blockdev_do_action(int kind, void *data, Error **errp) 685 { 686 BlockdevAction action; 687 BlockdevActionList list; 688 689 action.kind = kind; 690 action.data = data; 691 list.value = &action; 692 list.next = NULL; 693 qmp_transaction(&list, errp); 694 } 695 696 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, 697 bool has_format, const char *format, 698 bool has_mode, enum NewImageMode mode, 699 Error **errp) 700 { 701 BlockdevSnapshot snapshot = { 702 .device = (char *) device, 703 .snapshot_file = (char *) snapshot_file, 704 .has_format = has_format, 705 .format = (char *) format, 706 .has_mode = has_mode, 707 .mode = mode, 708 }; 709 blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot, 710 errp); 711 } 712 713 714 /* New and old BlockDriverState structs for group snapshots */ 715 typedef struct BlkTransactionStates { 716 BlockDriverState *old_bs; 717 BlockDriverState *new_bs; 718 QSIMPLEQ_ENTRY(BlkTransactionStates) entry; 719 } BlkTransactionStates; 720 721 /* 722 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail 723 * then we do not pivot any of the devices in the group, and abandon the 724 * snapshots 725 */ 726 void qmp_transaction(BlockdevActionList *dev_list, Error **errp) 727 { 728 int ret = 0; 729 BlockdevActionList *dev_entry = dev_list; 730 BlkTransactionStates *states, *next; 731 Error *local_err = NULL; 732 733 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states; 734 QSIMPLEQ_INIT(&snap_bdrv_states); 735 736 /* drain all i/o before any snapshots */ 737 bdrv_drain_all(); 738 739 /* We don't do anything in this loop that commits us to the snapshot */ 740 while (NULL != dev_entry) { 741 BlockdevAction *dev_info = NULL; 742 BlockDriver *proto_drv; 743 BlockDriver *drv; 744 int flags; 745 enum NewImageMode mode; 746 const char *new_image_file; 747 const char *device; 748 const char *format = "qcow2"; 749 750 dev_info = dev_entry->value; 751 dev_entry = dev_entry->next; 752 753 states = g_malloc0(sizeof(BlkTransactionStates)); 754 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry); 755 756 switch (dev_info->kind) { 757 case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: 758 device = dev_info->blockdev_snapshot_sync->device; 759 if (!dev_info->blockdev_snapshot_sync->has_mode) { 760 dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; 761 } 762 new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file; 763 if (dev_info->blockdev_snapshot_sync->has_format) { 764 format = dev_info->blockdev_snapshot_sync->format; 765 } 766 mode = dev_info->blockdev_snapshot_sync->mode; 767 break; 768 default: 769 abort(); 770 } 771 772 drv = bdrv_find_format(format); 773 if (!drv) { 774 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 775 goto delete_and_fail; 776 } 777 778 states->old_bs = bdrv_find(device); 779 if (!states->old_bs) { 780 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 781 goto delete_and_fail; 782 } 783 784 if (!bdrv_is_inserted(states->old_bs)) { 785 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 786 goto delete_and_fail; 787 } 788 789 if (bdrv_in_use(states->old_bs)) { 790 error_set(errp, QERR_DEVICE_IN_USE, device); 791 goto delete_and_fail; 792 } 793 794 if (!bdrv_is_read_only(states->old_bs)) { 795 if (bdrv_flush(states->old_bs)) { 796 error_set(errp, QERR_IO_ERROR); 797 goto delete_and_fail; 798 } 799 } 800 801 flags = states->old_bs->open_flags; 802 803 proto_drv = bdrv_find_protocol(new_image_file); 804 if (!proto_drv) { 805 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 806 goto delete_and_fail; 807 } 808 809 /* create new image w/backing file */ 810 if (mode != NEW_IMAGE_MODE_EXISTING) { 811 bdrv_img_create(new_image_file, format, 812 states->old_bs->filename, 813 states->old_bs->drv->format_name, 814 NULL, -1, flags, &local_err, false); 815 if (error_is_set(&local_err)) { 816 error_propagate(errp, local_err); 817 goto delete_and_fail; 818 } 819 } 820 821 /* We will manually add the backing_hd field to the bs later */ 822 states->new_bs = bdrv_new(""); 823 ret = bdrv_open(states->new_bs, new_image_file, 824 flags | BDRV_O_NO_BACKING, drv); 825 if (ret != 0) { 826 error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); 827 goto delete_and_fail; 828 } 829 } 830 831 832 /* Now we are going to do the actual pivot. Everything up to this point 833 * is reversible, but we are committed at this point */ 834 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { 835 /* This removes our old bs from the bdrv_states, and adds the new bs */ 836 bdrv_append(states->new_bs, states->old_bs); 837 /* We don't need (or want) to use the transactional 838 * bdrv_reopen_multiple() across all the entries at once, because we 839 * don't want to abort all of them if one of them fails the reopen */ 840 bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR, 841 NULL); 842 } 843 844 /* success */ 845 goto exit; 846 847 delete_and_fail: 848 /* 849 * failure, and it is all-or-none; abandon each new bs, and keep using 850 * the original bs for all images 851 */ 852 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { 853 if (states->new_bs) { 854 bdrv_delete(states->new_bs); 855 } 856 } 857 exit: 858 QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) { 859 g_free(states); 860 } 861 } 862 863 864 static void eject_device(BlockDriverState *bs, int force, Error **errp) 865 { 866 if (bdrv_in_use(bs)) { 867 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); 868 return; 869 } 870 if (!bdrv_dev_has_removable_media(bs)) { 871 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); 872 return; 873 } 874 875 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { 876 bdrv_dev_eject_request(bs, force); 877 if (!force) { 878 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); 879 return; 880 } 881 } 882 883 bdrv_close(bs); 884 } 885 886 void qmp_eject(const char *device, bool has_force, bool force, Error **errp) 887 { 888 BlockDriverState *bs; 889 890 bs = bdrv_find(device); 891 if (!bs) { 892 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 893 return; 894 } 895 896 eject_device(bs, force, errp); 897 } 898 899 void qmp_block_passwd(const char *device, const char *password, Error **errp) 900 { 901 BlockDriverState *bs; 902 int err; 903 904 bs = bdrv_find(device); 905 if (!bs) { 906 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 907 return; 908 } 909 910 err = bdrv_set_key(bs, password); 911 if (err == -EINVAL) { 912 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); 913 return; 914 } else if (err < 0) { 915 error_set(errp, QERR_INVALID_PASSWORD); 916 return; 917 } 918 } 919 920 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, 921 int bdrv_flags, BlockDriver *drv, 922 const char *password, Error **errp) 923 { 924 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { 925 error_set(errp, QERR_OPEN_FILE_FAILED, filename); 926 return; 927 } 928 929 if (bdrv_key_required(bs)) { 930 if (password) { 931 if (bdrv_set_key(bs, password) < 0) { 932 error_set(errp, QERR_INVALID_PASSWORD); 933 } 934 } else { 935 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), 936 bdrv_get_encrypted_filename(bs)); 937 } 938 } else if (password) { 939 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); 940 } 941 } 942 943 void qmp_change_blockdev(const char *device, const char *filename, 944 bool has_format, const char *format, Error **errp) 945 { 946 BlockDriverState *bs; 947 BlockDriver *drv = NULL; 948 int bdrv_flags; 949 Error *err = NULL; 950 951 bs = bdrv_find(device); 952 if (!bs) { 953 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 954 return; 955 } 956 957 if (format) { 958 drv = bdrv_find_whitelisted_format(format); 959 if (!drv) { 960 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 961 return; 962 } 963 } 964 965 eject_device(bs, 0, &err); 966 if (error_is_set(&err)) { 967 error_propagate(errp, err); 968 return; 969 } 970 971 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; 972 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; 973 974 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); 975 } 976 977 /* throttling disk I/O limits */ 978 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, 979 int64_t bps_wr, int64_t iops, int64_t iops_rd, 980 int64_t iops_wr, Error **errp) 981 { 982 BlockIOLimit io_limits; 983 BlockDriverState *bs; 984 985 bs = bdrv_find(device); 986 if (!bs) { 987 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 988 return; 989 } 990 991 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; 992 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; 993 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; 994 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; 995 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; 996 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; 997 998 if (!do_check_io_limits(&io_limits, errp)) { 999 return; 1000 } 1001 1002 bs->io_limits = io_limits; 1003 bs->slice_time = BLOCK_IO_SLICE_TIME; 1004 1005 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { 1006 bdrv_io_limits_enable(bs); 1007 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { 1008 bdrv_io_limits_disable(bs); 1009 } else { 1010 if (bs->block_timer) { 1011 qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); 1012 } 1013 } 1014 } 1015 1016 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) 1017 { 1018 const char *id = qdict_get_str(qdict, "id"); 1019 BlockDriverState *bs; 1020 1021 bs = bdrv_find(id); 1022 if (!bs) { 1023 qerror_report(QERR_DEVICE_NOT_FOUND, id); 1024 return -1; 1025 } 1026 if (bdrv_in_use(bs)) { 1027 qerror_report(QERR_DEVICE_IN_USE, id); 1028 return -1; 1029 } 1030 1031 /* quiesce block driver; prevent further io */ 1032 bdrv_drain_all(); 1033 bdrv_flush(bs); 1034 bdrv_close(bs); 1035 1036 /* if we have a device attached to this BlockDriverState 1037 * then we need to make the drive anonymous until the device 1038 * can be removed. If this is a drive with no device backing 1039 * then we can just get rid of the block driver state right here. 1040 */ 1041 if (bdrv_get_attached_dev(bs)) { 1042 bdrv_make_anon(bs); 1043 } else { 1044 drive_uninit(drive_get_by_blockdev(bs)); 1045 } 1046 1047 return 0; 1048 } 1049 1050 void qmp_block_resize(const char *device, int64_t size, Error **errp) 1051 { 1052 BlockDriverState *bs; 1053 1054 bs = bdrv_find(device); 1055 if (!bs) { 1056 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1057 return; 1058 } 1059 1060 if (size < 0) { 1061 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); 1062 return; 1063 } 1064 1065 switch (bdrv_truncate(bs, size)) { 1066 case 0: 1067 break; 1068 case -ENOMEDIUM: 1069 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1070 break; 1071 case -ENOTSUP: 1072 error_set(errp, QERR_UNSUPPORTED); 1073 break; 1074 case -EACCES: 1075 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); 1076 break; 1077 case -EBUSY: 1078 error_set(errp, QERR_DEVICE_IN_USE, device); 1079 break; 1080 default: 1081 error_set(errp, QERR_UNDEFINED_ERROR); 1082 break; 1083 } 1084 } 1085 1086 static void block_job_cb(void *opaque, int ret) 1087 { 1088 BlockDriverState *bs = opaque; 1089 QObject *obj; 1090 1091 trace_block_job_cb(bs, bs->job, ret); 1092 1093 assert(bs->job); 1094 obj = qobject_from_block_job(bs->job); 1095 if (ret < 0) { 1096 QDict *dict = qobject_to_qdict(obj); 1097 qdict_put(dict, "error", qstring_from_str(strerror(-ret))); 1098 } 1099 1100 if (block_job_is_cancelled(bs->job)) { 1101 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); 1102 } else { 1103 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); 1104 } 1105 qobject_decref(obj); 1106 1107 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); 1108 } 1109 1110 void qmp_block_stream(const char *device, bool has_base, 1111 const char *base, bool has_speed, int64_t speed, 1112 bool has_on_error, BlockdevOnError on_error, 1113 Error **errp) 1114 { 1115 BlockDriverState *bs; 1116 BlockDriverState *base_bs = NULL; 1117 Error *local_err = NULL; 1118 1119 if (!has_on_error) { 1120 on_error = BLOCKDEV_ON_ERROR_REPORT; 1121 } 1122 1123 bs = bdrv_find(device); 1124 if (!bs) { 1125 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1126 return; 1127 } 1128 1129 if (base) { 1130 base_bs = bdrv_find_backing_image(bs, base); 1131 if (base_bs == NULL) { 1132 error_set(errp, QERR_BASE_NOT_FOUND, base); 1133 return; 1134 } 1135 } 1136 1137 stream_start(bs, base_bs, base, has_speed ? speed : 0, 1138 on_error, block_job_cb, bs, &local_err); 1139 if (error_is_set(&local_err)) { 1140 error_propagate(errp, local_err); 1141 return; 1142 } 1143 1144 /* Grab a reference so hotplug does not delete the BlockDriverState from 1145 * underneath us. 1146 */ 1147 drive_get_ref(drive_get_by_blockdev(bs)); 1148 1149 trace_qmp_block_stream(bs, bs->job); 1150 } 1151 1152 void qmp_block_commit(const char *device, 1153 bool has_base, const char *base, const char *top, 1154 bool has_speed, int64_t speed, 1155 Error **errp) 1156 { 1157 BlockDriverState *bs; 1158 BlockDriverState *base_bs, *top_bs; 1159 Error *local_err = NULL; 1160 /* This will be part of the QMP command, if/when the 1161 * BlockdevOnError change for blkmirror makes it in 1162 */ 1163 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; 1164 1165 /* drain all i/o before commits */ 1166 bdrv_drain_all(); 1167 1168 bs = bdrv_find(device); 1169 if (!bs) { 1170 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1171 return; 1172 } 1173 1174 /* default top_bs is the active layer */ 1175 top_bs = bs; 1176 1177 if (top) { 1178 if (strcmp(bs->filename, top) != 0) { 1179 top_bs = bdrv_find_backing_image(bs, top); 1180 } 1181 } 1182 1183 if (top_bs == NULL) { 1184 error_setg(errp, "Top image file %s not found", top ? top : "NULL"); 1185 return; 1186 } 1187 1188 if (has_base && base) { 1189 base_bs = bdrv_find_backing_image(top_bs, base); 1190 } else { 1191 base_bs = bdrv_find_base(top_bs); 1192 } 1193 1194 if (base_bs == NULL) { 1195 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); 1196 return; 1197 } 1198 1199 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, 1200 &local_err); 1201 if (local_err != NULL) { 1202 error_propagate(errp, local_err); 1203 return; 1204 } 1205 /* Grab a reference so hotplug does not delete the BlockDriverState from 1206 * underneath us. 1207 */ 1208 drive_get_ref(drive_get_by_blockdev(bs)); 1209 } 1210 1211 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20) 1212 1213 void qmp_drive_mirror(const char *device, const char *target, 1214 bool has_format, const char *format, 1215 enum MirrorSyncMode sync, 1216 bool has_mode, enum NewImageMode mode, 1217 bool has_speed, int64_t speed, 1218 bool has_granularity, uint32_t granularity, 1219 bool has_buf_size, int64_t buf_size, 1220 bool has_on_source_error, BlockdevOnError on_source_error, 1221 bool has_on_target_error, BlockdevOnError on_target_error, 1222 Error **errp) 1223 { 1224 BlockDriverState *bs; 1225 BlockDriverState *source, *target_bs; 1226 BlockDriver *proto_drv; 1227 BlockDriver *drv = NULL; 1228 Error *local_err = NULL; 1229 int flags; 1230 uint64_t size; 1231 int ret; 1232 1233 if (!has_speed) { 1234 speed = 0; 1235 } 1236 if (!has_on_source_error) { 1237 on_source_error = BLOCKDEV_ON_ERROR_REPORT; 1238 } 1239 if (!has_on_target_error) { 1240 on_target_error = BLOCKDEV_ON_ERROR_REPORT; 1241 } 1242 if (!has_mode) { 1243 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; 1244 } 1245 if (!has_granularity) { 1246 granularity = 0; 1247 } 1248 if (!has_buf_size) { 1249 buf_size = DEFAULT_MIRROR_BUF_SIZE; 1250 } 1251 1252 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { 1253 error_set(errp, QERR_INVALID_PARAMETER, device); 1254 return; 1255 } 1256 if (granularity & (granularity - 1)) { 1257 error_set(errp, QERR_INVALID_PARAMETER, device); 1258 return; 1259 } 1260 1261 bs = bdrv_find(device); 1262 if (!bs) { 1263 error_set(errp, QERR_DEVICE_NOT_FOUND, device); 1264 return; 1265 } 1266 1267 if (!bdrv_is_inserted(bs)) { 1268 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); 1269 return; 1270 } 1271 1272 if (!has_format) { 1273 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; 1274 } 1275 if (format) { 1276 drv = bdrv_find_format(format); 1277 if (!drv) { 1278 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1279 return; 1280 } 1281 } 1282 1283 if (bdrv_in_use(bs)) { 1284 error_set(errp, QERR_DEVICE_IN_USE, device); 1285 return; 1286 } 1287 1288 flags = bs->open_flags | BDRV_O_RDWR; 1289 source = bs->backing_hd; 1290 if (!source && sync == MIRROR_SYNC_MODE_TOP) { 1291 sync = MIRROR_SYNC_MODE_FULL; 1292 } 1293 1294 proto_drv = bdrv_find_protocol(target); 1295 if (!proto_drv) { 1296 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); 1297 return; 1298 } 1299 1300 bdrv_get_geometry(bs, &size); 1301 size *= 512; 1302 if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) { 1303 /* create new image w/o backing file */ 1304 assert(format && drv); 1305 bdrv_img_create(target, format, 1306 NULL, NULL, NULL, size, flags, &local_err, false); 1307 } else { 1308 switch (mode) { 1309 case NEW_IMAGE_MODE_EXISTING: 1310 ret = 0; 1311 break; 1312 case NEW_IMAGE_MODE_ABSOLUTE_PATHS: 1313 /* create new image with backing file */ 1314 bdrv_img_create(target, format, 1315 source->filename, 1316 source->drv->format_name, 1317 NULL, size, flags, &local_err, false); 1318 break; 1319 default: 1320 abort(); 1321 } 1322 } 1323 1324 if (error_is_set(&local_err)) { 1325 error_propagate(errp, local_err); 1326 return; 1327 } 1328 1329 /* Mirroring takes care of copy-on-write using the source's backing 1330 * file. 1331 */ 1332 target_bs = bdrv_new(""); 1333 ret = bdrv_open(target_bs, target, flags | BDRV_O_NO_BACKING, drv); 1334 1335 if (ret < 0) { 1336 bdrv_delete(target_bs); 1337 error_set(errp, QERR_OPEN_FILE_FAILED, target); 1338 return; 1339 } 1340 1341 mirror_start(bs, target_bs, speed, granularity, buf_size, sync, 1342 on_source_error, on_target_error, 1343 block_job_cb, bs, &local_err); 1344 if (local_err != NULL) { 1345 bdrv_delete(target_bs); 1346 error_propagate(errp, local_err); 1347 return; 1348 } 1349 1350 /* Grab a reference so hotplug does not delete the BlockDriverState from 1351 * underneath us. 1352 */ 1353 drive_get_ref(drive_get_by_blockdev(bs)); 1354 } 1355 1356 static BlockJob *find_block_job(const char *device) 1357 { 1358 BlockDriverState *bs; 1359 1360 bs = bdrv_find(device); 1361 if (!bs || !bs->job) { 1362 return NULL; 1363 } 1364 return bs->job; 1365 } 1366 1367 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) 1368 { 1369 BlockJob *job = find_block_job(device); 1370 1371 if (!job) { 1372 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1373 return; 1374 } 1375 1376 block_job_set_speed(job, speed, errp); 1377 } 1378 1379 void qmp_block_job_cancel(const char *device, 1380 bool has_force, bool force, Error **errp) 1381 { 1382 BlockJob *job = find_block_job(device); 1383 1384 if (!has_force) { 1385 force = false; 1386 } 1387 1388 if (!job) { 1389 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1390 return; 1391 } 1392 if (job->paused && !force) { 1393 error_set(errp, QERR_BLOCK_JOB_PAUSED, device); 1394 return; 1395 } 1396 1397 trace_qmp_block_job_cancel(job); 1398 block_job_cancel(job); 1399 } 1400 1401 void qmp_block_job_pause(const char *device, Error **errp) 1402 { 1403 BlockJob *job = find_block_job(device); 1404 1405 if (!job) { 1406 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1407 return; 1408 } 1409 1410 trace_qmp_block_job_pause(job); 1411 block_job_pause(job); 1412 } 1413 1414 void qmp_block_job_resume(const char *device, Error **errp) 1415 { 1416 BlockJob *job = find_block_job(device); 1417 1418 if (!job) { 1419 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1420 return; 1421 } 1422 1423 trace_qmp_block_job_resume(job); 1424 block_job_resume(job); 1425 } 1426 1427 void qmp_block_job_complete(const char *device, Error **errp) 1428 { 1429 BlockJob *job = find_block_job(device); 1430 1431 if (!job) { 1432 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); 1433 return; 1434 } 1435 1436 trace_qmp_block_job_complete(job); 1437 block_job_complete(job, errp); 1438 } 1439 1440 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) 1441 { 1442 BlockJobInfoList **prev = opaque; 1443 BlockJob *job = bs->job; 1444 1445 if (job) { 1446 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); 1447 elem->value = block_job_query(bs->job); 1448 (*prev)->next = elem; 1449 *prev = elem; 1450 } 1451 } 1452 1453 BlockJobInfoList *qmp_query_block_jobs(Error **errp) 1454 { 1455 /* Dummy is a fake list element for holding the head pointer */ 1456 BlockJobInfoList dummy = {}; 1457 BlockJobInfoList *prev = &dummy; 1458 bdrv_iterate(do_qmp_query_block_jobs_one, &prev); 1459 return dummy.next; 1460 } 1461 1462 QemuOptsList qemu_drive_opts = { 1463 .name = "drive", 1464 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), 1465 .desc = { 1466 { 1467 .name = "bus", 1468 .type = QEMU_OPT_NUMBER, 1469 .help = "bus number", 1470 },{ 1471 .name = "unit", 1472 .type = QEMU_OPT_NUMBER, 1473 .help = "unit number (i.e. lun for scsi)", 1474 },{ 1475 .name = "if", 1476 .type = QEMU_OPT_STRING, 1477 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", 1478 },{ 1479 .name = "index", 1480 .type = QEMU_OPT_NUMBER, 1481 .help = "index number", 1482 },{ 1483 .name = "cyls", 1484 .type = QEMU_OPT_NUMBER, 1485 .help = "number of cylinders (ide disk geometry)", 1486 },{ 1487 .name = "heads", 1488 .type = QEMU_OPT_NUMBER, 1489 .help = "number of heads (ide disk geometry)", 1490 },{ 1491 .name = "secs", 1492 .type = QEMU_OPT_NUMBER, 1493 .help = "number of sectors (ide disk geometry)", 1494 },{ 1495 .name = "trans", 1496 .type = QEMU_OPT_STRING, 1497 .help = "chs translation (auto, lba. none)", 1498 },{ 1499 .name = "media", 1500 .type = QEMU_OPT_STRING, 1501 .help = "media type (disk, cdrom)", 1502 },{ 1503 .name = "snapshot", 1504 .type = QEMU_OPT_BOOL, 1505 .help = "enable/disable snapshot mode", 1506 },{ 1507 .name = "file", 1508 .type = QEMU_OPT_STRING, 1509 .help = "disk image", 1510 },{ 1511 .name = "discard", 1512 .type = QEMU_OPT_STRING, 1513 .help = "discard operation (ignore/off, unmap/on)", 1514 },{ 1515 .name = "cache", 1516 .type = QEMU_OPT_STRING, 1517 .help = "host cache usage (none, writeback, writethrough, " 1518 "directsync, unsafe)", 1519 },{ 1520 .name = "aio", 1521 .type = QEMU_OPT_STRING, 1522 .help = "host AIO implementation (threads, native)", 1523 },{ 1524 .name = "format", 1525 .type = QEMU_OPT_STRING, 1526 .help = "disk format (raw, qcow2, ...)", 1527 },{ 1528 .name = "serial", 1529 .type = QEMU_OPT_STRING, 1530 .help = "disk serial number", 1531 },{ 1532 .name = "rerror", 1533 .type = QEMU_OPT_STRING, 1534 .help = "read error action", 1535 },{ 1536 .name = "werror", 1537 .type = QEMU_OPT_STRING, 1538 .help = "write error action", 1539 },{ 1540 .name = "addr", 1541 .type = QEMU_OPT_STRING, 1542 .help = "pci address (virtio only)", 1543 },{ 1544 .name = "readonly", 1545 .type = QEMU_OPT_BOOL, 1546 .help = "open drive file as read-only", 1547 },{ 1548 .name = "iops", 1549 .type = QEMU_OPT_NUMBER, 1550 .help = "limit total I/O operations per second", 1551 },{ 1552 .name = "iops_rd", 1553 .type = QEMU_OPT_NUMBER, 1554 .help = "limit read operations per second", 1555 },{ 1556 .name = "iops_wr", 1557 .type = QEMU_OPT_NUMBER, 1558 .help = "limit write operations per second", 1559 },{ 1560 .name = "bps", 1561 .type = QEMU_OPT_NUMBER, 1562 .help = "limit total bytes per second", 1563 },{ 1564 .name = "bps_rd", 1565 .type = QEMU_OPT_NUMBER, 1566 .help = "limit read bytes per second", 1567 },{ 1568 .name = "bps_wr", 1569 .type = QEMU_OPT_NUMBER, 1570 .help = "limit write bytes per second", 1571 },{ 1572 .name = "copy-on-read", 1573 .type = QEMU_OPT_BOOL, 1574 .help = "copy read data from backing file into image file", 1575 },{ 1576 .name = "boot", 1577 .type = QEMU_OPT_BOOL, 1578 .help = "(deprecated, ignored)", 1579 }, 1580 { /* end of list */ } 1581 }, 1582 }; 1583