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