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