2 * QEMU host block devices
4 * Copyright (c) 2003-2008 Fabrice Bellard
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.
9 * This file incorporates work covered by the following copyright and
12 * Copyright (c) 2003-2008 Fabrice Bellard
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:
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
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
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 "qapi-visit.h"
42 #include "qapi/qmp-output-visitor.h"
43 #include "sysemu/sysemu.h"
44 #include "block/block_int.h"
45 #include "qmp-commands.h"
47 #include "sysemu/arch_init.h"
49 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
51 static const char *const if_name[IF_COUNT] = {
55 [IF_FLOPPY] = "floppy",
56 [IF_PFLASH] = "pflash",
59 [IF_VIRTIO] = "virtio",
63 static const int if_max_devs[IF_COUNT] = {
65 * Do not change these numbers! They govern how drive option
66 * index maps to unit and bus. That mapping is ABI.
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
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.
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.
89 void blockdev_mark_auto_del(BlockDriverState *bs)
91 DriveInfo *dinfo = drive_get_by_blockdev(bs);
93 if (dinfo && !dinfo->enable_auto_del) {
98 block_job_cancel(bs->job);
105 void blockdev_auto_del(BlockDriverState *bs)
107 DriveInfo *dinfo = drive_get_by_blockdev(bs);
109 if (dinfo && dinfo->auto_del) {
110 drive_put_ref(dinfo);
114 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
116 int max_devs = if_max_devs[type];
117 return max_devs ? index / max_devs : 0;
120 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
122 int max_devs = if_max_devs[type];
123 return max_devs ? index % max_devs : index;
126 QemuOpts *drive_def(const char *optstr)
128 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
131 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
137 opts = drive_def(optstr);
141 if (type != IF_DEFAULT) {
142 qemu_opt_set(opts, "if", if_name[type]);
145 snprintf(buf, sizeof(buf), "%d", index);
146 qemu_opt_set(opts, "index", buf);
149 qemu_opt_set(opts, "file", file);
153 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
157 /* seek interface, bus and unit */
159 QTAILQ_FOREACH(dinfo, &drives, next) {
160 if (dinfo->type == type &&
169 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
171 return drive_get(type,
172 drive_index_to_bus_id(type, index),
173 drive_index_to_unit_id(type, index));
176 int drive_get_max_bus(BlockInterfaceType type)
182 QTAILQ_FOREACH(dinfo, &drives, next) {
183 if(dinfo->type == type &&
184 dinfo->bus > max_bus)
185 max_bus = dinfo->bus;
190 /* Get a block device. This should only be used for single-drive devices
191 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
193 DriveInfo *drive_get_next(BlockInterfaceType type)
195 static int next_block_unit[IF_COUNT];
197 return drive_get(type, 0, next_block_unit[type]++);
200 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
204 QTAILQ_FOREACH(dinfo, &drives, next) {
205 if (dinfo->bdrv == bs) {
212 static void bdrv_format_print(void *opaque, const char *name)
214 error_printf(" %s", name);
217 static void drive_uninit(DriveInfo *dinfo)
220 qemu_opts_del(dinfo->opts);
223 bdrv_unref(dinfo->bdrv);
225 QTAILQ_REMOVE(&drives, dinfo, next);
226 g_free(dinfo->serial);
230 void drive_put_ref(DriveInfo *dinfo)
232 assert(dinfo->refcount);
233 if (--dinfo->refcount == 0) {
238 void drive_get_ref(DriveInfo *dinfo)
245 BlockDriverState *bs;
248 static void bdrv_put_ref_bh(void *opaque)
250 BDRVPutRefBH *s = opaque;
253 qemu_bh_delete(s->bh);
258 * Release a BDS reference in a BH
260 * It is not safe to use bdrv_unref() from a callback function when the callers
261 * still need the BlockDriverState. In such cases we schedule a BH to release
264 static void bdrv_put_ref_bh_schedule(BlockDriverState *bs)
268 s = g_new(BDRVPutRefBH, 1);
269 s->bh = qemu_bh_new(bdrv_put_ref_bh, s);
271 qemu_bh_schedule(s->bh);
274 static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
276 if (!strcmp(buf, "ignore")) {
277 return BLOCKDEV_ON_ERROR_IGNORE;
278 } else if (!is_read && !strcmp(buf, "enospc")) {
279 return BLOCKDEV_ON_ERROR_ENOSPC;
280 } else if (!strcmp(buf, "stop")) {
281 return BLOCKDEV_ON_ERROR_STOP;
282 } else if (!strcmp(buf, "report")) {
283 return BLOCKDEV_ON_ERROR_REPORT;
285 error_setg(errp, "'%s' invalid %s error action",
286 buf, is_read ? "read" : "write");
292 extern int start_simple_client(char* msg);
293 extern char* maru_convert_path(char* msg, const char *path);
296 static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
298 if (throttle_conflicting(cfg)) {
299 error_setg(errp, "bps/iops/max total values and read/write values"
300 " cannot be used at the same time");
304 if (!throttle_is_valid(cfg)) {
305 error_setg(errp, "bps/iops/maxs values must be 0 or greater");
312 typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
314 /* Takes the ownership of bs_opts */
315 static DriveInfo *blockdev_init(QDict *bs_opts,
316 BlockInterfaceType type,
320 const char *file = NULL;
324 int on_read_error, on_write_error;
333 bool has_driver_specific_opts;
334 BlockDriver *drv = NULL;
336 /* Check common options by copying from bs_opts to opts, all other options
337 * stay in bs_opts for processing by bdrv_open(). */
338 id = qdict_get_try_str(bs_opts, "id");
339 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
340 if (error_is_set(&error)) {
341 error_propagate(errp, error);
345 qemu_opts_absorb_qdict(opts, bs_opts, &error);
346 if (error_is_set(&error)) {
347 error_propagate(errp, error);
352 qdict_del(bs_opts, "id");
355 has_driver_specific_opts = !!qdict_size(bs_opts);
357 /* extract parameters */
358 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
359 ro = qemu_opt_get_bool(opts, "read-only", 0);
360 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
362 file = qemu_opt_get(opts, "file");
363 serial = qemu_opt_get(opts, "serial");
365 if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
366 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
367 error_setg(errp, "invalid discard option");
372 if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
373 bdrv_flags |= BDRV_O_CACHE_WB;
375 if (qemu_opt_get_bool(opts, "cache.direct", false)) {
376 bdrv_flags |= BDRV_O_NOCACHE;
378 if (qemu_opt_get_bool(opts, "cache.no-flush", false)) {
379 bdrv_flags |= BDRV_O_NO_FLUSH;
382 #ifdef CONFIG_LINUX_AIO
383 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
384 if (!strcmp(buf, "native")) {
385 bdrv_flags |= BDRV_O_NATIVE_AIO;
386 } else if (!strcmp(buf, "threads")) {
387 /* this is the default */
389 error_setg(errp, "invalid aio option");
395 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
396 if (is_help_option(buf)) {
397 error_printf("Supported formats:");
398 bdrv_iterate_format(bdrv_format_print, NULL);
403 drv = bdrv_find_format(buf);
405 error_setg(errp, "'%s' invalid format", buf);
410 /* disk I/O throttling */
411 memset(&cfg, 0, sizeof(cfg));
412 cfg.buckets[THROTTLE_BPS_TOTAL].avg =
413 qemu_opt_get_number(opts, "throttling.bps-total", 0);
414 cfg.buckets[THROTTLE_BPS_READ].avg =
415 qemu_opt_get_number(opts, "throttling.bps-read", 0);
416 cfg.buckets[THROTTLE_BPS_WRITE].avg =
417 qemu_opt_get_number(opts, "throttling.bps-write", 0);
418 cfg.buckets[THROTTLE_OPS_TOTAL].avg =
419 qemu_opt_get_number(opts, "throttling.iops-total", 0);
420 cfg.buckets[THROTTLE_OPS_READ].avg =
421 qemu_opt_get_number(opts, "throttling.iops-read", 0);
422 cfg.buckets[THROTTLE_OPS_WRITE].avg =
423 qemu_opt_get_number(opts, "throttling.iops-write", 0);
425 cfg.buckets[THROTTLE_BPS_TOTAL].max =
426 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
427 cfg.buckets[THROTTLE_BPS_READ].max =
428 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
429 cfg.buckets[THROTTLE_BPS_WRITE].max =
430 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
431 cfg.buckets[THROTTLE_OPS_TOTAL].max =
432 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
433 cfg.buckets[THROTTLE_OPS_READ].max =
434 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
435 cfg.buckets[THROTTLE_OPS_WRITE].max =
436 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
438 cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0);
440 if (!check_throttle_config(&cfg, &error)) {
441 error_propagate(errp, error);
445 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
446 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
447 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
448 error_setg(errp, "werror is not supported by this bus type");
452 on_write_error = parse_block_error_action(buf, 0, &error);
453 if (error_is_set(&error)) {
454 error_propagate(errp, error);
459 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
460 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
461 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
462 error_report("rerror is not supported by this bus type");
466 on_read_error = parse_block_error_action(buf, 1, &error);
467 if (error_is_set(&error)) {
468 error_propagate(errp, error);
474 dinfo = g_malloc0(sizeof(*dinfo));
475 dinfo->id = g_strdup(qemu_opts_id(opts));
476 dinfo->bdrv = bdrv_new(dinfo->id);
477 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
478 dinfo->bdrv->read_only = ro;
481 if (serial != NULL) {
482 dinfo->serial = g_strdup(serial);
484 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
486 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
488 /* disk I/O throttling */
489 if (throttle_enabled(&cfg)) {
490 bdrv_io_limits_enable(dinfo->bdrv);
491 bdrv_set_io_limits(dinfo->bdrv, &cfg);
494 if (!file || !*file) {
495 if (has_driver_specific_opts) {
504 /* always use cache=unsafe with snapshot */
505 bdrv_flags &= ~BDRV_O_CACHE_MASK;
506 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
510 bdrv_flags |= BDRV_O_COPY_ON_READ;
513 if (runstate_check(RUN_STATE_INMIGRATE)) {
514 bdrv_flags |= BDRV_O_INCOMING;
517 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
520 ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error);
524 const char _msg[] = "Failed to load disk file from the following path. Check if the file is corrupted or missing.\n\n";
525 char* err_msg = NULL;
526 err_msg = maru_convert_path((char*)_msg, file);
527 start_simple_client(err_msg);
533 error_setg(errp, "could not open disk image %s: %s",
534 file ?: dinfo->id, error_get_pretty(error));
539 if (bdrv_key_required(dinfo->bdrv))
548 bdrv_unref(dinfo->bdrv);
550 QTAILQ_REMOVE(&drives, dinfo, next);
558 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
562 value = qemu_opt_get(opts, from);
564 qemu_opt_set(opts, to, value);
565 qemu_opt_unset(opts, from);
569 QemuOptsList qemu_legacy_drive_opts = {
571 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
575 .type = QEMU_OPT_NUMBER,
576 .help = "bus number",
579 .type = QEMU_OPT_NUMBER,
580 .help = "unit number (i.e. lun for scsi)",
583 .type = QEMU_OPT_NUMBER,
584 .help = "index number",
587 .type = QEMU_OPT_STRING,
588 .help = "media type (disk, cdrom)",
591 .type = QEMU_OPT_STRING,
592 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
595 .type = QEMU_OPT_NUMBER,
596 .help = "number of cylinders (ide disk geometry)",
599 .type = QEMU_OPT_NUMBER,
600 .help = "number of heads (ide disk geometry)",
603 .type = QEMU_OPT_NUMBER,
604 .help = "number of sectors (ide disk geometry)",
607 .type = QEMU_OPT_STRING,
608 .help = "chs translation (auto, lba, none)",
611 .type = QEMU_OPT_BOOL,
612 .help = "(deprecated, ignored)",
615 .type = QEMU_OPT_STRING,
616 .help = "pci address (virtio only)",
619 /* Options that are passed on, but have special semantics with -drive */
622 .type = QEMU_OPT_BOOL,
623 .help = "open drive file as read-only",
625 .name = "copy-on-read",
626 .type = QEMU_OPT_BOOL,
627 .help = "copy read data from backing file into image file",
630 { /* end of list */ }
634 DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
637 DriveInfo *dinfo = NULL;
639 QemuOpts *legacy_opts;
640 DriveMediaType media = MEDIA_DISK;
641 BlockInterfaceType type;
642 int cyls, heads, secs, translation;
643 int max_devs, bus_id, unit_id, index;
645 bool read_only = false;
647 Error *local_err = NULL;
649 /* Change legacy command line options into QMP ones */
650 qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
651 qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
652 qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");
654 qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
655 qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
656 qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
658 qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max");
659 qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max");
660 qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max");
662 qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max");
663 qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max");
664 qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max");
666 qemu_opt_rename(all_opts,
667 "iops_size", "throttling.iops-size");
669 qemu_opt_rename(all_opts, "readonly", "read-only");
671 value = qemu_opt_get(all_opts, "cache");
675 if (bdrv_parse_cache_flags(value, &flags) != 0) {
676 error_report("invalid cache option");
680 /* Specific options take precedence */
681 if (!qemu_opt_get(all_opts, "cache.writeback")) {
682 qemu_opt_set_bool(all_opts, "cache.writeback",
683 !!(flags & BDRV_O_CACHE_WB));
685 if (!qemu_opt_get(all_opts, "cache.direct")) {
686 qemu_opt_set_bool(all_opts, "cache.direct",
687 !!(flags & BDRV_O_NOCACHE));
689 if (!qemu_opt_get(all_opts, "cache.no-flush")) {
690 qemu_opt_set_bool(all_opts, "cache.no-flush",
691 !!(flags & BDRV_O_NO_FLUSH));
693 qemu_opt_unset(all_opts, "cache");
696 /* Get a QDict for processing the options */
697 bs_opts = qdict_new();
698 qemu_opts_to_qdict(all_opts, bs_opts);
700 legacy_opts = qemu_opts_create_nofail(&qemu_legacy_drive_opts);
701 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
702 if (error_is_set(&local_err)) {
703 qerror_report_err(local_err);
704 error_free(local_err);
708 /* Deprecated option boot=[on|off] */
709 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
710 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
711 "ignored. Future versions will reject this parameter. Please "
712 "update your scripts.\n");
716 value = qemu_opt_get(legacy_opts, "media");
718 if (!strcmp(value, "disk")) {
720 } else if (!strcmp(value, "cdrom")) {
724 error_report("'%s' invalid media", value);
729 /* copy-on-read is disabled with a warning for read-only devices */
730 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
731 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
733 if (read_only && copy_on_read) {
734 error_report("warning: disabling copy-on-read on read-only drive");
735 copy_on_read = false;
738 qdict_put(bs_opts, "read-only",
739 qstring_from_str(read_only ? "on" : "off"));
740 qdict_put(bs_opts, "copy-on-read",
741 qstring_from_str(copy_on_read ? "on" :"off"));
743 /* Controller type */
744 value = qemu_opt_get(legacy_opts, "if");
747 type < IF_COUNT && strcmp(value, if_name[type]);
750 if (type == IF_COUNT) {
751 error_report("unsupported bus type '%s'", value);
755 type = block_default_type;
759 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
760 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
761 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
763 if (cyls || heads || secs) {
765 error_report("invalid physical cyls number");
769 error_report("invalid physical heads number");
773 error_report("invalid physical secs number");
778 translation = BIOS_ATA_TRANSLATION_AUTO;
779 value = qemu_opt_get(legacy_opts, "trans");
782 error_report("'%s' trans must be used with cyls, heads and secs",
786 if (!strcmp(value, "none")) {
787 translation = BIOS_ATA_TRANSLATION_NONE;
788 } else if (!strcmp(value, "lba")) {
789 translation = BIOS_ATA_TRANSLATION_LBA;
790 } else if (!strcmp(value, "auto")) {
791 translation = BIOS_ATA_TRANSLATION_AUTO;
793 error_report("'%s' invalid translation type", value);
798 if (media == MEDIA_CDROM) {
799 if (cyls || secs || heads) {
800 error_report("CHS can't be set with media=cdrom");
805 /* Device address specified by bus/unit or index.
806 * If none was specified, try to find the first free one. */
807 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
808 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
809 index = qemu_opt_get_number(legacy_opts, "index", -1);
811 max_devs = if_max_devs[type];
814 if (bus_id != 0 || unit_id != -1) {
815 error_report("index cannot be used with bus and unit");
818 bus_id = drive_index_to_bus_id(type, index);
819 unit_id = drive_index_to_unit_id(type, index);
824 while (drive_get(type, bus_id, unit_id) != NULL) {
826 if (max_devs && unit_id >= max_devs) {
833 if (max_devs && unit_id >= max_devs) {
834 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
838 if (drive_get(type, bus_id, unit_id) != NULL) {
839 error_report("drive with bus=%d, unit=%d (index=%d) exists",
840 bus_id, unit_id, index);
844 /* no id supplied -> create one */
845 if (qemu_opts_id(all_opts) == NULL) {
847 const char *mediastr = "";
848 if (type == IF_IDE || type == IF_SCSI) {
849 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
852 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
855 new_id = g_strdup_printf("%s%s%i", if_name[type],
858 qdict_put(bs_opts, "id", qstring_from_str(new_id));
862 /* Add virtio block device */
863 devaddr = qemu_opt_get(legacy_opts, "addr");
864 if (devaddr && type != IF_VIRTIO) {
865 error_report("addr is not supported by this bus type");
869 if (type == IF_VIRTIO) {
871 devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
872 if (arch_type == QEMU_ARCH_S390X) {
873 qemu_opt_set(devopts, "driver", "virtio-blk-s390");
875 qemu_opt_set(devopts, "driver", "virtio-blk-pci");
877 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"));
879 qemu_opt_set(devopts, "addr", devaddr);
883 /* Actual block device init: Functionality shared with blockdev-add */
884 dinfo = blockdev_init(bs_opts, type, &local_err);
886 if (error_is_set(&local_err)) {
887 qerror_report_err(local_err);
888 error_free(local_err);
892 assert(!error_is_set(&local_err));
895 /* Set legacy DriveInfo fields */
896 dinfo->enable_auto_del = true;
897 dinfo->opts = all_opts;
900 dinfo->heads = heads;
902 dinfo->trans = translation;
905 dinfo->unit = unit_id;
906 dinfo->devaddr = devaddr;
913 dinfo->media_cd = media == MEDIA_CDROM;
920 qemu_opts_del(legacy_opts);
924 void do_commit(Monitor *mon, const QDict *qdict)
926 const char *device = qdict_get_str(qdict, "device");
927 BlockDriverState *bs;
930 if (!strcmp(device, "all")) {
931 ret = bdrv_commit_all();
933 bs = bdrv_find(device);
935 monitor_printf(mon, "Device '%s' not found\n", device);
938 ret = bdrv_commit(bs);
941 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
946 static void blockdev_do_action(int kind, void *data, Error **errp)
948 TransactionAction action;
949 TransactionActionList list;
953 list.value = &action;
955 qmp_transaction(&list, errp);
958 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
959 bool has_format, const char *format,
960 bool has_mode, enum NewImageMode mode,
963 BlockdevSnapshot snapshot = {
964 .device = (char *) device,
965 .snapshot_file = (char *) snapshot_file,
966 .has_format = has_format,
967 .format = (char *) format,
968 .has_mode = has_mode,
971 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
975 void qmp_blockdev_snapshot_internal_sync(const char *device,
979 BlockdevSnapshotInternal snapshot = {
980 .device = (char *) device,
981 .name = (char *) name
984 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
988 SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
995 BlockDriverState *bs = bdrv_find(device);
997 Error *local_err = NULL;
998 SnapshotInfo *info = NULL;
1002 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1015 error_setg(errp, "Name or id must be provided");
1019 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
1020 if (error_is_set(&local_err)) {
1021 error_propagate(errp, local_err);
1026 "Snapshot with id '%s' and name '%s' does not exist on "
1028 STR_OR_NULL(id), STR_OR_NULL(name), device);
1032 bdrv_snapshot_delete(bs, id, name, &local_err);
1033 if (error_is_set(&local_err)) {
1034 error_propagate(errp, local_err);
1038 info = g_malloc0(sizeof(SnapshotInfo));
1039 info->id = g_strdup(sn.id_str);
1040 info->name = g_strdup(sn.name);
1041 info->date_nsec = sn.date_nsec;
1042 info->date_sec = sn.date_sec;
1043 info->vm_state_size = sn.vm_state_size;
1044 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1045 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1050 /* New and old BlockDriverState structs for group snapshots */
1052 typedef struct BlkTransactionState BlkTransactionState;
1054 /* Only prepare() may fail. In a single transaction, only one of commit() or
1055 abort() will be called, clean() will always be called if it present. */
1056 typedef struct BdrvActionOps {
1057 /* Size of state struct, in bytes. */
1058 size_t instance_size;
1059 /* Prepare the work, must NOT be NULL. */
1060 void (*prepare)(BlkTransactionState *common, Error **errp);
1061 /* Commit the changes, can be NULL. */
1062 void (*commit)(BlkTransactionState *common);
1063 /* Abort the changes on fail, can be NULL. */
1064 void (*abort)(BlkTransactionState *common);
1065 /* Clean up resource in the end, can be NULL. */
1066 void (*clean)(BlkTransactionState *common);
1070 * This structure must be arranged as first member in child type, assuming
1071 * that compiler will also arrange it to the same address with parent instance.
1072 * Later it will be used in free().
1074 struct BlkTransactionState {
1075 TransactionAction *action;
1076 const BdrvActionOps *ops;
1077 QSIMPLEQ_ENTRY(BlkTransactionState) entry;
1080 /* internal snapshot private data */
1081 typedef struct InternalSnapshotState {
1082 BlkTransactionState common;
1083 BlockDriverState *bs;
1084 QEMUSnapshotInfo sn;
1085 } InternalSnapshotState;
1087 static void internal_snapshot_prepare(BlkTransactionState *common,
1092 BlockDriverState *bs;
1093 QEMUSnapshotInfo old_sn, *sn;
1096 BlockdevSnapshotInternal *internal;
1097 InternalSnapshotState *state;
1100 g_assert(common->action->kind ==
1101 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
1102 internal = common->action->blockdev_snapshot_internal_sync;
1103 state = DO_UPCAST(InternalSnapshotState, common, common);
1105 /* 1. parse input */
1106 device = internal->device;
1107 name = internal->name;
1109 /* 2. check for validation */
1110 bs = bdrv_find(device);
1112 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1116 if (!bdrv_is_inserted(bs)) {
1117 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1121 if (bdrv_is_read_only(bs)) {
1122 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1126 if (!bdrv_can_snapshot(bs)) {
1127 error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
1128 bs->drv->format_name, device, "internal snapshot");
1132 if (!strlen(name)) {
1133 error_setg(errp, "Name is empty");
1137 /* check whether a snapshot with name exist */
1138 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, errp);
1139 if (error_is_set(errp)) {
1143 "Snapshot with name '%s' already exists on device '%s'",
1148 /* 3. take the snapshot */
1150 pstrcpy(sn->name, sizeof(sn->name), name);
1151 qemu_gettimeofday(&tv);
1152 sn->date_sec = tv.tv_sec;
1153 sn->date_nsec = tv.tv_usec * 1000;
1154 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1156 ret1 = bdrv_snapshot_create(bs, sn);
1158 error_setg_errno(errp, -ret1,
1159 "Failed to create snapshot '%s' on device '%s'",
1164 /* 4. succeed, mark a snapshot is created */
1168 static void internal_snapshot_abort(BlkTransactionState *common)
1170 InternalSnapshotState *state =
1171 DO_UPCAST(InternalSnapshotState, common, common);
1172 BlockDriverState *bs = state->bs;
1173 QEMUSnapshotInfo *sn = &state->sn;
1174 Error *local_error = NULL;
1180 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
1181 error_report("Failed to delete snapshot with id '%s' and name '%s' on "
1182 "device '%s' in abort: %s",
1185 bdrv_get_device_name(bs),
1186 error_get_pretty(local_error));
1187 error_free(local_error);
1191 /* external snapshot private data */
1192 typedef struct ExternalSnapshotState {
1193 BlkTransactionState common;
1194 BlockDriverState *old_bs;
1195 BlockDriverState *new_bs;
1196 } ExternalSnapshotState;
1198 static void external_snapshot_prepare(BlkTransactionState *common,
1203 Error *local_err = NULL;
1205 const char *new_image_file;
1206 const char *format = "qcow2";
1207 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1208 ExternalSnapshotState *state =
1209 DO_UPCAST(ExternalSnapshotState, common, common);
1210 TransactionAction *action = common->action;
1212 /* get parameters */
1213 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
1215 device = action->blockdev_snapshot_sync->device;
1216 new_image_file = action->blockdev_snapshot_sync->snapshot_file;
1217 if (action->blockdev_snapshot_sync->has_format) {
1218 format = action->blockdev_snapshot_sync->format;
1220 if (action->blockdev_snapshot_sync->has_mode) {
1221 mode = action->blockdev_snapshot_sync->mode;
1224 /* start processing */
1225 drv = bdrv_find_format(format);
1227 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1231 state->old_bs = bdrv_find(device);
1232 if (!state->old_bs) {
1233 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1237 if (!bdrv_is_inserted(state->old_bs)) {
1238 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1242 if (bdrv_in_use(state->old_bs)) {
1243 error_set(errp, QERR_DEVICE_IN_USE, device);
1247 if (!bdrv_is_read_only(state->old_bs)) {
1248 if (bdrv_flush(state->old_bs)) {
1249 error_set(errp, QERR_IO_ERROR);
1254 if (bdrv_check_ext_snapshot(state->old_bs) != EXT_SNAPSHOT_ALLOWED) {
1255 error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
1259 flags = state->old_bs->open_flags;
1261 /* create new image w/backing file */
1262 if (mode != NEW_IMAGE_MODE_EXISTING) {
1263 bdrv_img_create(new_image_file, format,
1264 state->old_bs->filename,
1265 state->old_bs->drv->format_name,
1266 NULL, -1, flags, &local_err, false);
1267 if (error_is_set(&local_err)) {
1268 error_propagate(errp, local_err);
1273 /* We will manually add the backing_hd field to the bs later */
1274 state->new_bs = bdrv_new("");
1275 /* TODO Inherit bs->options or only take explicit options with an
1276 * extended QMP command? */
1277 ret = bdrv_open(state->new_bs, new_image_file, NULL,
1278 flags | BDRV_O_NO_BACKING, drv, &local_err);
1280 error_propagate(errp, local_err);
1284 static void external_snapshot_commit(BlkTransactionState *common)
1286 ExternalSnapshotState *state =
1287 DO_UPCAST(ExternalSnapshotState, common, common);
1289 /* This removes our old bs and adds the new bs */
1290 bdrv_append(state->new_bs, state->old_bs);
1291 /* We don't need (or want) to use the transactional
1292 * bdrv_reopen_multiple() across all the entries at once, because we
1293 * don't want to abort all of them if one of them fails the reopen */
1294 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
1298 static void external_snapshot_abort(BlkTransactionState *common)
1300 ExternalSnapshotState *state =
1301 DO_UPCAST(ExternalSnapshotState, common, common);
1302 if (state->new_bs) {
1303 bdrv_unref(state->new_bs);
1307 typedef struct DriveBackupState {
1308 BlkTransactionState common;
1309 BlockDriverState *bs;
1313 static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
1315 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1316 DriveBackup *backup;
1317 Error *local_err = NULL;
1319 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1320 backup = common->action->drive_backup;
1322 qmp_drive_backup(backup->device, backup->target,
1323 backup->has_format, backup->format,
1325 backup->has_mode, backup->mode,
1326 backup->has_speed, backup->speed,
1327 backup->has_on_source_error, backup->on_source_error,
1328 backup->has_on_target_error, backup->on_target_error,
1330 if (error_is_set(&local_err)) {
1331 error_propagate(errp, local_err);
1337 state->bs = bdrv_find(backup->device);
1338 state->job = state->bs->job;
1341 static void drive_backup_abort(BlkTransactionState *common)
1343 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1344 BlockDriverState *bs = state->bs;
1346 /* Only cancel if it's the job we started */
1347 if (bs && bs->job && bs->job == state->job) {
1348 block_job_cancel_sync(bs->job);
1352 static void abort_prepare(BlkTransactionState *common, Error **errp)
1354 error_setg(errp, "Transaction aborted using Abort action");
1357 static void abort_commit(BlkTransactionState *common)
1359 g_assert_not_reached(); /* this action never succeeds */
1362 static const BdrvActionOps actions[] = {
1363 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
1364 .instance_size = sizeof(ExternalSnapshotState),
1365 .prepare = external_snapshot_prepare,
1366 .commit = external_snapshot_commit,
1367 .abort = external_snapshot_abort,
1369 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1370 .instance_size = sizeof(DriveBackupState),
1371 .prepare = drive_backup_prepare,
1372 .abort = drive_backup_abort,
1374 [TRANSACTION_ACTION_KIND_ABORT] = {
1375 .instance_size = sizeof(BlkTransactionState),
1376 .prepare = abort_prepare,
1377 .commit = abort_commit,
1379 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
1380 .instance_size = sizeof(InternalSnapshotState),
1381 .prepare = internal_snapshot_prepare,
1382 .abort = internal_snapshot_abort,
1387 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1388 * then we do not pivot any of the devices in the group, and abandon the
1391 void qmp_transaction(TransactionActionList *dev_list, Error **errp)
1393 TransactionActionList *dev_entry = dev_list;
1394 BlkTransactionState *state, *next;
1395 Error *local_err = NULL;
1397 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
1398 QSIMPLEQ_INIT(&snap_bdrv_states);
1400 /* drain all i/o before any snapshots */
1403 /* We don't do anything in this loop that commits us to the snapshot */
1404 while (NULL != dev_entry) {
1405 TransactionAction *dev_info = NULL;
1406 const BdrvActionOps *ops;
1408 dev_info = dev_entry->value;
1409 dev_entry = dev_entry->next;
1411 assert(dev_info->kind < ARRAY_SIZE(actions));
1413 ops = &actions[dev_info->kind];
1414 assert(ops->instance_size > 0);
1416 state = g_malloc0(ops->instance_size);
1418 state->action = dev_info;
1419 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
1421 state->ops->prepare(state, &local_err);
1422 if (error_is_set(&local_err)) {
1423 error_propagate(errp, local_err);
1424 goto delete_and_fail;
1428 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1429 if (state->ops->commit) {
1430 state->ops->commit(state);
1439 * failure, and it is all-or-none; abandon each new bs, and keep using
1440 * the original bs for all images
1442 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1443 if (state->ops->abort) {
1444 state->ops->abort(state);
1448 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
1449 if (state->ops->clean) {
1450 state->ops->clean(state);
1457 static void eject_device(BlockDriverState *bs, int force, Error **errp)
1459 if (bdrv_in_use(bs)) {
1460 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
1463 if (!bdrv_dev_has_removable_media(bs)) {
1464 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
1468 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
1469 bdrv_dev_eject_request(bs, force);
1471 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
1479 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
1481 BlockDriverState *bs;
1483 bs = bdrv_find(device);
1485 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1489 eject_device(bs, force, errp);
1492 void qmp_block_passwd(const char *device, const char *password, Error **errp)
1494 BlockDriverState *bs;
1497 bs = bdrv_find(device);
1499 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1503 err = bdrv_set_key(bs, password);
1504 if (err == -EINVAL) {
1505 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1507 } else if (err < 0) {
1508 error_set(errp, QERR_INVALID_PASSWORD);
1513 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
1514 int bdrv_flags, BlockDriver *drv,
1515 const char *password, Error **errp)
1517 Error *local_err = NULL;
1520 ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv, &local_err);
1522 error_propagate(errp, local_err);
1526 if (bdrv_key_required(bs)) {
1528 if (bdrv_set_key(bs, password) < 0) {
1529 error_set(errp, QERR_INVALID_PASSWORD);
1532 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
1533 bdrv_get_encrypted_filename(bs));
1535 } else if (password) {
1536 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1540 void qmp_change_blockdev(const char *device, const char *filename,
1541 bool has_format, const char *format, Error **errp)
1543 BlockDriverState *bs;
1544 BlockDriver *drv = NULL;
1548 bs = bdrv_find(device);
1550 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1555 drv = bdrv_find_whitelisted_format(format, bs->read_only);
1557 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1562 eject_device(bs, 0, &err);
1563 if (error_is_set(&err)) {
1564 error_propagate(errp, err);
1568 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
1569 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
1571 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
1574 /* throttling disk I/O limits */
1575 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
1582 bool has_bps_rd_max,
1584 bool has_bps_wr_max,
1588 bool has_iops_rd_max,
1589 int64_t iops_rd_max,
1590 bool has_iops_wr_max,
1591 int64_t iops_wr_max,
1593 int64_t iops_size, Error **errp)
1596 BlockDriverState *bs;
1598 bs = bdrv_find(device);
1600 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1604 memset(&cfg, 0, sizeof(cfg));
1605 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
1606 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
1607 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
1609 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
1610 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
1611 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
1614 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
1616 if (has_bps_rd_max) {
1617 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
1619 if (has_bps_wr_max) {
1620 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
1623 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
1625 if (has_iops_rd_max) {
1626 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
1628 if (has_iops_wr_max) {
1629 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
1632 if (has_iops_size) {
1633 cfg.op_size = iops_size;
1636 if (!check_throttle_config(&cfg, errp)) {
1640 if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
1641 bdrv_io_limits_enable(bs);
1642 } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) {
1643 bdrv_io_limits_disable(bs);
1646 if (bs->io_limits_enabled) {
1647 bdrv_set_io_limits(bs, &cfg);
1651 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1653 const char *id = qdict_get_str(qdict, "id");
1654 BlockDriverState *bs;
1658 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1661 if (bdrv_in_use(bs)) {
1662 qerror_report(QERR_DEVICE_IN_USE, id);
1666 /* quiesce block driver; prevent further io */
1671 /* if we have a device attached to this BlockDriverState
1672 * then we need to make the drive anonymous until the device
1673 * can be removed. If this is a drive with no device backing
1674 * then we can just get rid of the block driver state right here.
1676 if (bdrv_get_attached_dev(bs)) {
1679 /* Further I/O must not pause the guest */
1680 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
1681 BLOCKDEV_ON_ERROR_REPORT);
1683 drive_uninit(drive_get_by_blockdev(bs));
1689 void qmp_block_resize(const char *device, int64_t size, Error **errp)
1691 BlockDriverState *bs;
1694 bs = bdrv_find(device);
1696 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1701 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1705 /* complete all in-flight operations before resizing the device */
1708 ret = bdrv_truncate(bs, size);
1713 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1716 error_set(errp, QERR_UNSUPPORTED);
1719 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1722 error_set(errp, QERR_DEVICE_IN_USE, device);
1725 error_setg_errno(errp, -ret, "Could not resize");
1730 static void block_job_cb(void *opaque, int ret)
1732 BlockDriverState *bs = opaque;
1735 trace_block_job_cb(bs, bs->job, ret);
1738 obj = qobject_from_block_job(bs->job);
1740 QDict *dict = qobject_to_qdict(obj);
1741 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1744 if (block_job_is_cancelled(bs->job)) {
1745 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1747 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1749 qobject_decref(obj);
1751 bdrv_put_ref_bh_schedule(bs);
1754 void qmp_block_stream(const char *device, bool has_base,
1755 const char *base, bool has_speed, int64_t speed,
1756 bool has_on_error, BlockdevOnError on_error,
1759 BlockDriverState *bs;
1760 BlockDriverState *base_bs = NULL;
1761 Error *local_err = NULL;
1763 if (!has_on_error) {
1764 on_error = BLOCKDEV_ON_ERROR_REPORT;
1767 bs = bdrv_find(device);
1769 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1774 base_bs = bdrv_find_backing_image(bs, base);
1775 if (base_bs == NULL) {
1776 error_set(errp, QERR_BASE_NOT_FOUND, base);
1781 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1782 on_error, block_job_cb, bs, &local_err);
1783 if (error_is_set(&local_err)) {
1784 error_propagate(errp, local_err);
1788 trace_qmp_block_stream(bs, bs->job);
1791 void qmp_block_commit(const char *device,
1792 bool has_base, const char *base, const char *top,
1793 bool has_speed, int64_t speed,
1796 BlockDriverState *bs;
1797 BlockDriverState *base_bs, *top_bs;
1798 Error *local_err = NULL;
1799 /* This will be part of the QMP command, if/when the
1800 * BlockdevOnError change for blkmirror makes it in
1802 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1804 /* drain all i/o before commits */
1807 bs = bdrv_find(device);
1809 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1813 /* default top_bs is the active layer */
1817 if (strcmp(bs->filename, top) != 0) {
1818 top_bs = bdrv_find_backing_image(bs, top);
1822 if (top_bs == NULL) {
1823 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
1827 if (has_base && base) {
1828 base_bs = bdrv_find_backing_image(top_bs, base);
1830 base_bs = bdrv_find_base(top_bs);
1833 if (base_bs == NULL) {
1834 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
1838 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
1840 if (local_err != NULL) {
1841 error_propagate(errp, local_err);
1846 void qmp_drive_backup(const char *device, const char *target,
1847 bool has_format, const char *format,
1848 enum MirrorSyncMode sync,
1849 bool has_mode, enum NewImageMode mode,
1850 bool has_speed, int64_t speed,
1851 bool has_on_source_error, BlockdevOnError on_source_error,
1852 bool has_on_target_error, BlockdevOnError on_target_error,
1855 BlockDriverState *bs;
1856 BlockDriverState *target_bs;
1857 BlockDriverState *source = NULL;
1858 BlockDriver *drv = NULL;
1859 Error *local_err = NULL;
1867 if (!has_on_source_error) {
1868 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1870 if (!has_on_target_error) {
1871 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1874 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1877 bs = bdrv_find(device);
1879 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1883 if (!bdrv_is_inserted(bs)) {
1884 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1889 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1892 drv = bdrv_find_format(format);
1894 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1899 if (bdrv_in_use(bs)) {
1900 error_set(errp, QERR_DEVICE_IN_USE, device);
1904 flags = bs->open_flags | BDRV_O_RDWR;
1906 /* See if we have a backing HD we can use to create our new image
1908 if (sync == MIRROR_SYNC_MODE_TOP) {
1909 source = bs->backing_hd;
1911 sync = MIRROR_SYNC_MODE_FULL;
1914 if (sync == MIRROR_SYNC_MODE_NONE) {
1918 size = bdrv_getlength(bs);
1920 error_setg_errno(errp, -size, "bdrv_getlength failed");
1924 if (mode != NEW_IMAGE_MODE_EXISTING) {
1925 assert(format && drv);
1927 bdrv_img_create(target, format, source->filename,
1928 source->drv->format_name, NULL,
1929 size, flags, &local_err, false);
1931 bdrv_img_create(target, format, NULL, NULL, NULL,
1932 size, flags, &local_err, false);
1936 if (error_is_set(&local_err)) {
1937 error_propagate(errp, local_err);
1941 target_bs = bdrv_new("");
1942 ret = bdrv_open(target_bs, target, NULL, flags, drv, &local_err);
1944 bdrv_unref(target_bs);
1945 error_propagate(errp, local_err);
1949 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
1950 block_job_cb, bs, &local_err);
1951 if (local_err != NULL) {
1952 bdrv_unref(target_bs);
1953 error_propagate(errp, local_err);
1958 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
1960 void qmp_drive_mirror(const char *device, const char *target,
1961 bool has_format, const char *format,
1962 enum MirrorSyncMode sync,
1963 bool has_mode, enum NewImageMode mode,
1964 bool has_speed, int64_t speed,
1965 bool has_granularity, uint32_t granularity,
1966 bool has_buf_size, int64_t buf_size,
1967 bool has_on_source_error, BlockdevOnError on_source_error,
1968 bool has_on_target_error, BlockdevOnError on_target_error,
1971 BlockDriverState *bs;
1972 BlockDriverState *source, *target_bs;
1973 BlockDriver *drv = NULL;
1974 Error *local_err = NULL;
1982 if (!has_on_source_error) {
1983 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1985 if (!has_on_target_error) {
1986 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1989 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1991 if (!has_granularity) {
1994 if (!has_buf_size) {
1995 buf_size = DEFAULT_MIRROR_BUF_SIZE;
1998 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
1999 error_set(errp, QERR_INVALID_PARAMETER, device);
2002 if (granularity & (granularity - 1)) {
2003 error_set(errp, QERR_INVALID_PARAMETER, device);
2007 bs = bdrv_find(device);
2009 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
2013 if (!bdrv_is_inserted(bs)) {
2014 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
2019 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
2022 drv = bdrv_find_format(format);
2024 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
2029 if (bdrv_in_use(bs)) {
2030 error_set(errp, QERR_DEVICE_IN_USE, device);
2034 flags = bs->open_flags | BDRV_O_RDWR;
2035 source = bs->backing_hd;
2036 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
2037 sync = MIRROR_SYNC_MODE_FULL;
2039 if (sync == MIRROR_SYNC_MODE_NONE) {
2043 size = bdrv_getlength(bs);
2045 error_setg_errno(errp, -size, "bdrv_getlength failed");
2049 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
2050 && mode != NEW_IMAGE_MODE_EXISTING)
2052 /* create new image w/o backing file */
2053 assert(format && drv);
2054 bdrv_img_create(target, format,
2055 NULL, NULL, NULL, size, flags, &local_err, false);
2058 case NEW_IMAGE_MODE_EXISTING:
2060 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
2061 /* create new image with backing file */
2062 bdrv_img_create(target, format,
2064 source->drv->format_name,
2065 NULL, size, flags, &local_err, false);
2072 if (error_is_set(&local_err)) {
2073 error_propagate(errp, local_err);
2077 /* Mirroring takes care of copy-on-write using the source's backing
2080 target_bs = bdrv_new("");
2081 ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv,
2084 bdrv_unref(target_bs);
2085 error_propagate(errp, local_err);
2089 mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
2090 on_source_error, on_target_error,
2091 block_job_cb, bs, &local_err);
2092 if (local_err != NULL) {
2093 bdrv_unref(target_bs);
2094 error_propagate(errp, local_err);
2099 static BlockJob *find_block_job(const char *device)
2101 BlockDriverState *bs;
2103 bs = bdrv_find(device);
2104 if (!bs || !bs->job) {
2110 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
2112 BlockJob *job = find_block_job(device);
2115 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2119 block_job_set_speed(job, speed, errp);
2122 void qmp_block_job_cancel(const char *device,
2123 bool has_force, bool force, Error **errp)
2125 BlockJob *job = find_block_job(device);
2132 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2135 if (job->paused && !force) {
2136 error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
2140 trace_qmp_block_job_cancel(job);
2141 block_job_cancel(job);
2144 void qmp_block_job_pause(const char *device, Error **errp)
2146 BlockJob *job = find_block_job(device);
2149 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2153 trace_qmp_block_job_pause(job);
2154 block_job_pause(job);
2157 void qmp_block_job_resume(const char *device, Error **errp)
2159 BlockJob *job = find_block_job(device);
2162 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2166 trace_qmp_block_job_resume(job);
2167 block_job_resume(job);
2170 void qmp_block_job_complete(const char *device, Error **errp)
2172 BlockJob *job = find_block_job(device);
2175 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2179 trace_qmp_block_job_complete(job);
2180 block_job_complete(job, errp);
2183 void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
2185 QmpOutputVisitor *ov = qmp_output_visitor_new();
2188 Error *local_err = NULL;
2190 /* Require an ID in the top level */
2191 if (!options->has_id) {
2192 error_setg(errp, "Block device needs an ID");
2196 /* TODO Sort it out in raw-posix and drive_init: Reject aio=native with
2197 * cache.direct=false instead of silently switching to aio=threads, except
2198 * if called from drive_init.
2200 * For now, simply forbidding the combination for all drivers will do. */
2201 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
2202 bool direct = options->cache->has_direct && options->cache->direct;
2203 if (!options->has_cache && !direct) {
2204 error_setg(errp, "aio=native requires cache.direct=true");
2209 visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
2210 &options, NULL, &local_err);
2211 if (error_is_set(&local_err)) {
2212 error_propagate(errp, local_err);
2216 obj = qmp_output_get_qobject(ov);
2217 qdict = qobject_to_qdict(obj);
2219 qdict_flatten(qdict);
2221 blockdev_init(qdict, IF_NONE, &local_err);
2222 if (error_is_set(&local_err)) {
2223 error_propagate(errp, local_err);
2228 qmp_output_visitor_cleanup(ov);
2231 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
2233 BlockJobInfoList **prev = opaque;
2234 BlockJob *job = bs->job;
2237 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
2238 elem->value = block_job_query(bs->job);
2239 (*prev)->next = elem;
2244 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
2246 /* Dummy is a fake list element for holding the head pointer */
2247 BlockJobInfoList dummy = {};
2248 BlockJobInfoList *prev = &dummy;
2249 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
2253 QemuOptsList qemu_common_drive_opts = {
2255 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
2259 .type = QEMU_OPT_BOOL,
2260 .help = "enable/disable snapshot mode",
2263 .type = QEMU_OPT_STRING,
2264 .help = "disk image",
2267 .type = QEMU_OPT_STRING,
2268 .help = "discard operation (ignore/off, unmap/on)",
2270 .name = "cache.writeback",
2271 .type = QEMU_OPT_BOOL,
2272 .help = "enables writeback mode for any caches",
2274 .name = "cache.direct",
2275 .type = QEMU_OPT_BOOL,
2276 .help = "enables use of O_DIRECT (bypass the host page cache)",
2278 .name = "cache.no-flush",
2279 .type = QEMU_OPT_BOOL,
2280 .help = "ignore any flush requests for the device",
2283 .type = QEMU_OPT_STRING,
2284 .help = "host AIO implementation (threads, native)",
2287 .type = QEMU_OPT_STRING,
2288 .help = "disk format (raw, qcow2, ...)",
2291 .type = QEMU_OPT_STRING,
2292 .help = "disk serial number",
2295 .type = QEMU_OPT_STRING,
2296 .help = "read error action",
2299 .type = QEMU_OPT_STRING,
2300 .help = "write error action",
2302 .name = "read-only",
2303 .type = QEMU_OPT_BOOL,
2304 .help = "open drive file as read-only",
2306 .name = "throttling.iops-total",
2307 .type = QEMU_OPT_NUMBER,
2308 .help = "limit total I/O operations per second",
2310 .name = "throttling.iops-read",
2311 .type = QEMU_OPT_NUMBER,
2312 .help = "limit read operations per second",
2314 .name = "throttling.iops-write",
2315 .type = QEMU_OPT_NUMBER,
2316 .help = "limit write operations per second",
2318 .name = "throttling.bps-total",
2319 .type = QEMU_OPT_NUMBER,
2320 .help = "limit total bytes per second",
2322 .name = "throttling.bps-read",
2323 .type = QEMU_OPT_NUMBER,
2324 .help = "limit read bytes per second",
2326 .name = "throttling.bps-write",
2327 .type = QEMU_OPT_NUMBER,
2328 .help = "limit write bytes per second",
2330 .name = "throttling.iops-total-max",
2331 .type = QEMU_OPT_NUMBER,
2332 .help = "I/O operations burst",
2334 .name = "throttling.iops-read-max",
2335 .type = QEMU_OPT_NUMBER,
2336 .help = "I/O operations read burst",
2338 .name = "throttling.iops-write-max",
2339 .type = QEMU_OPT_NUMBER,
2340 .help = "I/O operations write burst",
2342 .name = "throttling.bps-total-max",
2343 .type = QEMU_OPT_NUMBER,
2344 .help = "total bytes burst",
2346 .name = "throttling.bps-read-max",
2347 .type = QEMU_OPT_NUMBER,
2348 .help = "total bytes read burst",
2350 .name = "throttling.bps-write-max",
2351 .type = QEMU_OPT_NUMBER,
2352 .help = "total bytes write burst",
2354 .name = "throttling.iops-size",
2355 .type = QEMU_OPT_NUMBER,
2356 .help = "when limiting by iops max size of an I/O in bytes",
2358 .name = "copy-on-read",
2359 .type = QEMU_OPT_BOOL,
2360 .help = "copy read data from backing file into image file",
2362 { /* end of list */ }
2366 QemuOptsList qemu_drive_opts = {
2368 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
2371 * no elements => accept any params
2372 * validation will happen later
2374 { /* end of list */ }