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