mirror of
https://github.com/qemu/qemu.git
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bd1386cce1
It's already confusing that we have two very similar functions for wrapping the parse of a 64-bit unsigned value, differing mainly on whether they permit leading '-'. Adjust the signature of parse_uint() and parse_uint_full() to be like all of qemu_strto*(): put the result parameter last, use the same types (uint64_t and unsigned long long have the same width, but are not always the same type), and mark endptr const (this latter change only affects the rare caller of parse_uint). Adjust all callers in the tree. While at it, note that since cutils.c already includes: QEMU_BUILD_BUG_ON(sizeof(int64_t) != sizeof(long long)); we are guaranteed that the result of parse_uint* cannot exceed UINT64_MAX (or the build would have failed), so we can drop pre-existing dead comparisons in opts-visitor.c that were never false. Reviewed-by: Hanna Czenczek <hreitz@redhat.com> Message-Id: <20230522190441.64278-8-eblake@redhat.com> [eblake: Drop dead code spotted by Markus] Signed-off-by: Eric Blake <eblake@redhat.com>
3736 lines
111 KiB
C
3736 lines
111 KiB
C
/*
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* QEMU host block devices
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "sysemu/block-backend.h"
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#include "sysemu/blockdev.h"
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#include "hw/block/block.h"
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#include "block/blockjob.h"
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#include "block/dirty-bitmap.h"
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#include "block/qdict.h"
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#include "block/throttle-groups.h"
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#include "monitor/monitor.h"
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#include "qemu/error-report.h"
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#include "qemu/option.h"
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#include "qemu/qemu-print.h"
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#include "qemu/config-file.h"
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#include "qapi/qapi-commands-block.h"
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#include "qapi/qapi-commands-transaction.h"
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#include "qapi/qapi-visit-block-core.h"
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#include "qapi/qmp/qdict.h"
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#include "qapi/qmp/qnum.h"
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#include "qapi/qmp/qstring.h"
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#include "qapi/error.h"
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#include "qapi/qmp/qerror.h"
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#include "qapi/qmp/qlist.h"
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#include "qapi/qobject-output-visitor.h"
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#include "sysemu/sysemu.h"
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#include "sysemu/iothread.h"
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#include "block/block_int.h"
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#include "block/trace.h"
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#include "sysemu/runstate.h"
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#include "sysemu/replay.h"
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#include "qemu/cutils.h"
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#include "qemu/help_option.h"
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#include "qemu/main-loop.h"
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#include "qemu/throttle-options.h"
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/* Protected by BQL */
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QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
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QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
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void bdrv_set_monitor_owned(BlockDriverState *bs)
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{
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GLOBAL_STATE_CODE();
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QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
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}
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static const char *const if_name[IF_COUNT] = {
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[IF_NONE] = "none",
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[IF_IDE] = "ide",
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[IF_SCSI] = "scsi",
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[IF_FLOPPY] = "floppy",
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[IF_PFLASH] = "pflash",
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[IF_MTD] = "mtd",
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[IF_SD] = "sd",
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[IF_VIRTIO] = "virtio",
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[IF_XEN] = "xen",
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};
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static int if_max_devs[IF_COUNT] = {
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/*
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* Do not change these numbers! They govern how drive option
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* index maps to unit and bus. That mapping is ABI.
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*
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* All controllers used to implement if=T drives need to support
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* if_max_devs[T] units, for any T with if_max_devs[T] != 0.
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* Otherwise, some index values map to "impossible" bus, unit
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* values.
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*
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* For instance, if you change [IF_SCSI] to 255, -drive
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* if=scsi,index=12 no longer means bus=1,unit=5, but
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* bus=0,unit=12. With an lsi53c895a controller (7 units max),
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* the drive can't be set up. Regression.
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*/
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[IF_IDE] = 2,
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[IF_SCSI] = 7,
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};
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/**
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* Boards may call this to offer board-by-board overrides
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* of the default, global values.
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*/
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void override_max_devs(BlockInterfaceType type, int max_devs)
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{
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BlockBackend *blk;
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DriveInfo *dinfo;
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GLOBAL_STATE_CODE();
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if (max_devs <= 0) {
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return;
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}
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for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
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dinfo = blk_legacy_dinfo(blk);
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if (dinfo->type == type) {
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fprintf(stderr, "Cannot override units-per-bus property of"
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" the %s interface, because a drive of that type has"
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" already been added.\n", if_name[type]);
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g_assert_not_reached();
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}
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}
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if_max_devs[type] = max_devs;
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}
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/*
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* We automatically delete the drive when a device using it gets
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* unplugged. Questionable feature, but we can't just drop it.
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* Device models call blockdev_mark_auto_del() to schedule the
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* automatic deletion, and generic qdev code calls blockdev_auto_del()
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* when deletion is actually safe.
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*/
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void blockdev_mark_auto_del(BlockBackend *blk)
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{
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DriveInfo *dinfo = blk_legacy_dinfo(blk);
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BlockJob *job;
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GLOBAL_STATE_CODE();
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if (!dinfo) {
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return;
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}
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JOB_LOCK_GUARD();
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do {
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job = block_job_next_locked(NULL);
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while (job && (job->job.cancelled ||
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job->job.deferred_to_main_loop ||
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!block_job_has_bdrv(job, blk_bs(blk))))
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{
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job = block_job_next_locked(job);
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}
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if (job) {
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/*
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* This drops the job lock temporarily and polls, so we need to
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* restart processing the list from the start after this.
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*/
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job_cancel_locked(&job->job, false);
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}
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} while (job);
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dinfo->auto_del = 1;
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}
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void blockdev_auto_del(BlockBackend *blk)
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{
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DriveInfo *dinfo = blk_legacy_dinfo(blk);
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GLOBAL_STATE_CODE();
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if (dinfo && dinfo->auto_del) {
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monitor_remove_blk(blk);
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blk_unref(blk);
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}
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}
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static int drive_index_to_bus_id(BlockInterfaceType type, int index)
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{
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int max_devs = if_max_devs[type];
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return max_devs ? index / max_devs : 0;
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}
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static int drive_index_to_unit_id(BlockInterfaceType type, int index)
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{
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int max_devs = if_max_devs[type];
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return max_devs ? index % max_devs : index;
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}
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QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
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const char *optstr)
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{
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QemuOpts *opts;
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GLOBAL_STATE_CODE();
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opts = qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
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if (!opts) {
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return NULL;
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}
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if (type != IF_DEFAULT) {
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qemu_opt_set(opts, "if", if_name[type], &error_abort);
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}
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if (index >= 0) {
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qemu_opt_set_number(opts, "index", index, &error_abort);
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}
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if (file)
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qemu_opt_set(opts, "file", file, &error_abort);
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return opts;
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}
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DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
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{
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BlockBackend *blk;
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DriveInfo *dinfo;
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GLOBAL_STATE_CODE();
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for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
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dinfo = blk_legacy_dinfo(blk);
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if (dinfo && dinfo->type == type
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&& dinfo->bus == bus && dinfo->unit == unit) {
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return dinfo;
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}
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}
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return NULL;
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}
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/*
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* Check board claimed all -drive that are meant to be claimed.
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* Fatal error if any remain unclaimed.
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*/
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void drive_check_orphaned(void)
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{
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BlockBackend *blk;
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DriveInfo *dinfo;
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Location loc;
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bool orphans = false;
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GLOBAL_STATE_CODE();
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for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
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dinfo = blk_legacy_dinfo(blk);
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/*
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* Ignore default drives, because we create certain default
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* drives unconditionally, then leave them unclaimed. Not the
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* users fault.
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* Ignore IF_VIRTIO, because it gets desugared into -device,
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* so we can leave failing to -device.
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* Ignore IF_NONE, because leaving unclaimed IF_NONE remains
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* available for device_add is a feature.
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*/
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if (dinfo->is_default || dinfo->type == IF_VIRTIO
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|| dinfo->type == IF_NONE) {
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continue;
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}
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if (!blk_get_attached_dev(blk)) {
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loc_push_none(&loc);
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qemu_opts_loc_restore(dinfo->opts);
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error_report("machine type does not support"
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" if=%s,bus=%d,unit=%d",
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if_name[dinfo->type], dinfo->bus, dinfo->unit);
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loc_pop(&loc);
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orphans = true;
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}
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}
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if (orphans) {
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exit(1);
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}
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}
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DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
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{
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GLOBAL_STATE_CODE();
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return drive_get(type,
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drive_index_to_bus_id(type, index),
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drive_index_to_unit_id(type, index));
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}
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int drive_get_max_bus(BlockInterfaceType type)
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{
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int max_bus;
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BlockBackend *blk;
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DriveInfo *dinfo;
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GLOBAL_STATE_CODE();
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max_bus = -1;
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for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
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dinfo = blk_legacy_dinfo(blk);
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if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
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max_bus = dinfo->bus;
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}
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}
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return max_bus;
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}
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static void bdrv_format_print(void *opaque, const char *name)
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{
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qemu_printf(" %s", name);
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}
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typedef struct {
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QEMUBH *bh;
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BlockDriverState *bs;
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} BDRVPutRefBH;
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static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
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{
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if (!strcmp(buf, "ignore")) {
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return BLOCKDEV_ON_ERROR_IGNORE;
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} else if (!is_read && !strcmp(buf, "enospc")) {
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return BLOCKDEV_ON_ERROR_ENOSPC;
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} else if (!strcmp(buf, "stop")) {
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return BLOCKDEV_ON_ERROR_STOP;
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} else if (!strcmp(buf, "report")) {
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return BLOCKDEV_ON_ERROR_REPORT;
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} else {
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error_setg(errp, "'%s' invalid %s error action",
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buf, is_read ? "read" : "write");
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return -1;
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}
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}
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static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
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Error **errp)
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{
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const QListEntry *entry;
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for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
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switch (qobject_type(entry->value)) {
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case QTYPE_QSTRING: {
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uint64_t length;
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const char *str = qstring_get_str(qobject_to(QString,
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entry->value));
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if (parse_uint_full(str, 10, &length) == 0 &&
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length > 0 && length <= UINT_MAX) {
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block_acct_add_interval(stats, (unsigned) length);
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} else {
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error_setg(errp, "Invalid interval length: %s", str);
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return false;
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}
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break;
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}
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case QTYPE_QNUM: {
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int64_t length = qnum_get_int(qobject_to(QNum, entry->value));
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if (length > 0 && length <= UINT_MAX) {
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block_acct_add_interval(stats, (unsigned) length);
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} else {
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error_setg(errp, "Invalid interval length: %" PRId64, length);
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return false;
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}
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break;
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}
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default:
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error_setg(errp, "The specification of stats-intervals is invalid");
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return false;
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}
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}
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return true;
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}
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typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
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/* All parameters but @opts are optional and may be set to NULL. */
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static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
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const char **throttling_group, ThrottleConfig *throttle_cfg,
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BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
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{
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Error *local_error = NULL;
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const char *aio;
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if (bdrv_flags) {
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if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
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*bdrv_flags |= BDRV_O_COPY_ON_READ;
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}
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if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
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if (bdrv_parse_aio(aio, bdrv_flags) < 0) {
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error_setg(errp, "invalid aio option");
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return;
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}
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}
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}
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/* disk I/O throttling */
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if (throttling_group) {
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*throttling_group = qemu_opt_get(opts, "throttling.group");
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}
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if (throttle_cfg) {
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throttle_config_init(throttle_cfg);
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throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
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qemu_opt_get_number(opts, "throttling.bps-total", 0);
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throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
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qemu_opt_get_number(opts, "throttling.bps-read", 0);
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throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
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qemu_opt_get_number(opts, "throttling.bps-write", 0);
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throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
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qemu_opt_get_number(opts, "throttling.iops-total", 0);
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throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
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qemu_opt_get_number(opts, "throttling.iops-read", 0);
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throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
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qemu_opt_get_number(opts, "throttling.iops-write", 0);
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throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
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qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
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throttle_cfg->buckets[THROTTLE_BPS_READ].max =
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qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
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throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
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qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
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throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
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qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
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throttle_cfg->buckets[THROTTLE_OPS_READ].max =
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qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
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throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
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qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
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throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
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qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
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throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
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qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
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throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
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qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
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throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
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qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
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throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
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qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
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throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
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qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
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|
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throttle_cfg->op_size =
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qemu_opt_get_number(opts, "throttling.iops-size", 0);
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|
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if (!throttle_is_valid(throttle_cfg, errp)) {
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return;
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}
|
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}
|
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|
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if (detect_zeroes) {
|
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*detect_zeroes =
|
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qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup,
|
|
qemu_opt_get(opts, "detect-zeroes"),
|
|
BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
|
|
&local_error);
|
|
if (local_error) {
|
|
error_propagate(errp, local_error);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
static OnOffAuto account_get_opt(QemuOpts *opts, const char *name)
|
|
{
|
|
if (!qemu_opt_find(opts, name)) {
|
|
return ON_OFF_AUTO_AUTO;
|
|
}
|
|
if (qemu_opt_get_bool(opts, name, true)) {
|
|
return ON_OFF_AUTO_ON;
|
|
}
|
|
return ON_OFF_AUTO_OFF;
|
|
}
|
|
|
|
/* Takes the ownership of bs_opts */
|
|
static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
|
|
Error **errp)
|
|
{
|
|
const char *buf;
|
|
int bdrv_flags = 0;
|
|
int on_read_error, on_write_error;
|
|
OnOffAuto account_invalid, account_failed;
|
|
bool writethrough, read_only;
|
|
BlockBackend *blk;
|
|
BlockDriverState *bs;
|
|
ThrottleConfig cfg;
|
|
int snapshot = 0;
|
|
Error *error = NULL;
|
|
QemuOpts *opts;
|
|
QDict *interval_dict = NULL;
|
|
QList *interval_list = NULL;
|
|
const char *id;
|
|
BlockdevDetectZeroesOptions detect_zeroes =
|
|
BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
|
|
const char *throttling_group = NULL;
|
|
|
|
/* Check common options by copying from bs_opts to opts, all other options
|
|
* stay in bs_opts for processing by bdrv_open(). */
|
|
id = qdict_get_try_str(bs_opts, "id");
|
|
opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, errp);
|
|
if (!opts) {
|
|
goto err_no_opts;
|
|
}
|
|
|
|
if (!qemu_opts_absorb_qdict(opts, bs_opts, errp)) {
|
|
goto early_err;
|
|
}
|
|
|
|
if (id) {
|
|
qdict_del(bs_opts, "id");
|
|
}
|
|
|
|
/* extract parameters */
|
|
snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
|
|
|
|
account_invalid = account_get_opt(opts, "stats-account-invalid");
|
|
account_failed = account_get_opt(opts, "stats-account-failed");
|
|
|
|
writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
|
|
|
|
id = qemu_opts_id(opts);
|
|
|
|
qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
|
|
qdict_array_split(interval_dict, &interval_list);
|
|
|
|
if (qdict_size(interval_dict) != 0) {
|
|
error_setg(errp, "Invalid option stats-intervals.%s",
|
|
qdict_first(interval_dict)->key);
|
|
goto early_err;
|
|
}
|
|
|
|
extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
|
|
&detect_zeroes, &error);
|
|
if (error) {
|
|
error_propagate(errp, error);
|
|
goto early_err;
|
|
}
|
|
|
|
if ((buf = qemu_opt_get(opts, "format")) != NULL) {
|
|
if (is_help_option(buf)) {
|
|
qemu_printf("Supported formats:");
|
|
bdrv_iterate_format(bdrv_format_print, NULL, false);
|
|
qemu_printf("\nSupported formats (read-only):");
|
|
bdrv_iterate_format(bdrv_format_print, NULL, true);
|
|
qemu_printf("\n");
|
|
goto early_err;
|
|
}
|
|
|
|
if (qdict_haskey(bs_opts, "driver")) {
|
|
error_setg(errp, "Cannot specify both 'driver' and 'format'");
|
|
goto early_err;
|
|
}
|
|
qdict_put_str(bs_opts, "driver", buf);
|
|
}
|
|
|
|
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
|
|
if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
|
|
on_write_error = parse_block_error_action(buf, 0, &error);
|
|
if (error) {
|
|
error_propagate(errp, error);
|
|
goto early_err;
|
|
}
|
|
}
|
|
|
|
on_read_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
|
|
on_read_error = parse_block_error_action(buf, 1, &error);
|
|
if (error) {
|
|
error_propagate(errp, error);
|
|
goto early_err;
|
|
}
|
|
}
|
|
|
|
if (snapshot) {
|
|
bdrv_flags |= BDRV_O_SNAPSHOT;
|
|
}
|
|
|
|
read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false);
|
|
|
|
/* init */
|
|
if ((!file || !*file) && !qdict_size(bs_opts)) {
|
|
BlockBackendRootState *blk_rs;
|
|
|
|
blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL);
|
|
blk_rs = blk_get_root_state(blk);
|
|
blk_rs->open_flags = bdrv_flags | (read_only ? 0 : BDRV_O_RDWR);
|
|
blk_rs->detect_zeroes = detect_zeroes;
|
|
|
|
qobject_unref(bs_opts);
|
|
} else {
|
|
if (file && !*file) {
|
|
file = NULL;
|
|
}
|
|
|
|
/* bdrv_open() defaults to the values in bdrv_flags (for compatibility
|
|
* with other callers) rather than what we want as the real defaults.
|
|
* Apply the defaults here instead. */
|
|
qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
|
|
qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
|
|
qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY,
|
|
read_only ? "on" : "off");
|
|
qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on");
|
|
assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
|
|
|
|
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
|
bdrv_flags |= BDRV_O_INACTIVE;
|
|
}
|
|
|
|
blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
|
|
if (!blk) {
|
|
goto err_no_bs_opts;
|
|
}
|
|
bs = blk_bs(blk);
|
|
|
|
bs->detect_zeroes = detect_zeroes;
|
|
|
|
block_acct_setup(blk_get_stats(blk), account_invalid, account_failed);
|
|
|
|
if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
|
|
blk_unref(blk);
|
|
blk = NULL;
|
|
goto err_no_bs_opts;
|
|
}
|
|
}
|
|
|
|
/* disk I/O throttling */
|
|
if (throttle_enabled(&cfg)) {
|
|
if (!throttling_group) {
|
|
throttling_group = id;
|
|
}
|
|
blk_io_limits_enable(blk, throttling_group);
|
|
blk_set_io_limits(blk, &cfg);
|
|
}
|
|
|
|
blk_set_enable_write_cache(blk, !writethrough);
|
|
blk_set_on_error(blk, on_read_error, on_write_error);
|
|
|
|
if (!monitor_add_blk(blk, id, errp)) {
|
|
blk_unref(blk);
|
|
blk = NULL;
|
|
goto err_no_bs_opts;
|
|
}
|
|
|
|
err_no_bs_opts:
|
|
qemu_opts_del(opts);
|
|
qobject_unref(interval_dict);
|
|
qobject_unref(interval_list);
|
|
return blk;
|
|
|
|
early_err:
|
|
qemu_opts_del(opts);
|
|
qobject_unref(interval_dict);
|
|
qobject_unref(interval_list);
|
|
err_no_opts:
|
|
qobject_unref(bs_opts);
|
|
return NULL;
|
|
}
|
|
|
|
/* Takes the ownership of bs_opts */
|
|
BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
int bdrv_flags = 0;
|
|
|
|
GLOBAL_STATE_CODE();
|
|
/* bdrv_open() defaults to the values in bdrv_flags (for compatibility
|
|
* with other callers) rather than what we want as the real defaults.
|
|
* Apply the defaults here instead. */
|
|
qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
|
|
qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
|
|
qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off");
|
|
|
|
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
|
bdrv_flags |= BDRV_O_INACTIVE;
|
|
}
|
|
|
|
aio_context_acquire(qemu_get_aio_context());
|
|
bs = bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
|
|
aio_context_release(qemu_get_aio_context());
|
|
|
|
return bs;
|
|
}
|
|
|
|
void blockdev_close_all_bdrv_states(void)
|
|
{
|
|
BlockDriverState *bs, *next_bs;
|
|
|
|
GLOBAL_STATE_CODE();
|
|
QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
|
|
AioContext *ctx = bdrv_get_aio_context(bs);
|
|
|
|
aio_context_acquire(ctx);
|
|
bdrv_unref(bs);
|
|
aio_context_release(ctx);
|
|
}
|
|
}
|
|
|
|
/* Iterates over the list of monitor-owned BlockDriverStates */
|
|
BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
|
|
{
|
|
GLOBAL_STATE_CODE();
|
|
return bs ? QTAILQ_NEXT(bs, monitor_list)
|
|
: QTAILQ_FIRST(&monitor_bdrv_states);
|
|
}
|
|
|
|
static bool qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
|
|
Error **errp)
|
|
{
|
|
const char *value;
|
|
|
|
value = qemu_opt_get(opts, from);
|
|
if (value) {
|
|
if (qemu_opt_find(opts, to)) {
|
|
error_setg(errp, "'%s' and its alias '%s' can't be used at the "
|
|
"same time", to, from);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/* rename all items in opts */
|
|
while ((value = qemu_opt_get(opts, from))) {
|
|
qemu_opt_set(opts, to, value, &error_abort);
|
|
qemu_opt_unset(opts, from);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
QemuOptsList qemu_legacy_drive_opts = {
|
|
.name = "drive",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = "bus",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "bus number",
|
|
},{
|
|
.name = "unit",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "unit number (i.e. lun for scsi)",
|
|
},{
|
|
.name = "index",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "index number",
|
|
},{
|
|
.name = "media",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "media type (disk, cdrom)",
|
|
},{
|
|
.name = "if",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
|
},{
|
|
.name = "file",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "file name",
|
|
},
|
|
|
|
/* Options that are passed on, but have special semantics with -drive */
|
|
{
|
|
.name = BDRV_OPT_READ_ONLY,
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "open drive file as read-only",
|
|
},{
|
|
.name = "rerror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "read error action",
|
|
},{
|
|
.name = "werror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "write error action",
|
|
},{
|
|
.name = "copy-on-read",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "copy read data from backing file into image file",
|
|
},
|
|
|
|
{ /* end of list */ }
|
|
},
|
|
};
|
|
|
|
DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type,
|
|
Error **errp)
|
|
{
|
|
const char *value;
|
|
BlockBackend *blk;
|
|
DriveInfo *dinfo = NULL;
|
|
QDict *bs_opts;
|
|
QemuOpts *legacy_opts;
|
|
DriveMediaType media = MEDIA_DISK;
|
|
BlockInterfaceType type;
|
|
int max_devs, bus_id, unit_id, index;
|
|
const char *werror, *rerror;
|
|
bool read_only = false;
|
|
bool copy_on_read;
|
|
const char *filename;
|
|
int i;
|
|
|
|
GLOBAL_STATE_CODE();
|
|
|
|
/* Change legacy command line options into QMP ones */
|
|
static const struct {
|
|
const char *from;
|
|
const char *to;
|
|
} opt_renames[] = {
|
|
{ "iops", "throttling.iops-total" },
|
|
{ "iops_rd", "throttling.iops-read" },
|
|
{ "iops_wr", "throttling.iops-write" },
|
|
|
|
{ "bps", "throttling.bps-total" },
|
|
{ "bps_rd", "throttling.bps-read" },
|
|
{ "bps_wr", "throttling.bps-write" },
|
|
|
|
{ "iops_max", "throttling.iops-total-max" },
|
|
{ "iops_rd_max", "throttling.iops-read-max" },
|
|
{ "iops_wr_max", "throttling.iops-write-max" },
|
|
|
|
{ "bps_max", "throttling.bps-total-max" },
|
|
{ "bps_rd_max", "throttling.bps-read-max" },
|
|
{ "bps_wr_max", "throttling.bps-write-max" },
|
|
|
|
{ "iops_size", "throttling.iops-size" },
|
|
|
|
{ "group", "throttling.group" },
|
|
|
|
{ "readonly", BDRV_OPT_READ_ONLY },
|
|
};
|
|
|
|
for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
|
|
if (!qemu_opt_rename(all_opts, opt_renames[i].from,
|
|
opt_renames[i].to, errp)) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
value = qemu_opt_get(all_opts, "cache");
|
|
if (value) {
|
|
int flags = 0;
|
|
bool writethrough;
|
|
|
|
if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
|
|
error_setg(errp, "invalid cache option");
|
|
return NULL;
|
|
}
|
|
|
|
/* Specific options take precedence */
|
|
if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
|
|
qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
|
|
!writethrough, &error_abort);
|
|
}
|
|
if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
|
|
qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
|
|
!!(flags & BDRV_O_NOCACHE), &error_abort);
|
|
}
|
|
if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
|
|
qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
|
|
!!(flags & BDRV_O_NO_FLUSH), &error_abort);
|
|
}
|
|
qemu_opt_unset(all_opts, "cache");
|
|
}
|
|
|
|
/* Get a QDict for processing the options */
|
|
bs_opts = qdict_new();
|
|
qemu_opts_to_qdict(all_opts, bs_opts);
|
|
|
|
legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
|
|
&error_abort);
|
|
if (!qemu_opts_absorb_qdict(legacy_opts, bs_opts, errp)) {
|
|
goto fail;
|
|
}
|
|
|
|
/* Media type */
|
|
value = qemu_opt_get(legacy_opts, "media");
|
|
if (value) {
|
|
if (!strcmp(value, "disk")) {
|
|
media = MEDIA_DISK;
|
|
} else if (!strcmp(value, "cdrom")) {
|
|
media = MEDIA_CDROM;
|
|
read_only = true;
|
|
} else {
|
|
error_setg(errp, "'%s' invalid media", value);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* copy-on-read is disabled with a warning for read-only devices */
|
|
read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false);
|
|
copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
|
|
|
|
if (read_only && copy_on_read) {
|
|
warn_report("disabling copy-on-read on read-only drive");
|
|
copy_on_read = false;
|
|
}
|
|
|
|
qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off");
|
|
qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off");
|
|
|
|
/* Controller type */
|
|
value = qemu_opt_get(legacy_opts, "if");
|
|
if (value) {
|
|
for (type = 0;
|
|
type < IF_COUNT && strcmp(value, if_name[type]);
|
|
type++) {
|
|
}
|
|
if (type == IF_COUNT) {
|
|
error_setg(errp, "unsupported bus type '%s'", value);
|
|
goto fail;
|
|
}
|
|
} else {
|
|
type = block_default_type;
|
|
}
|
|
|
|
/* Device address specified by bus/unit or index.
|
|
* If none was specified, try to find the first free one. */
|
|
bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
|
|
unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
|
|
index = qemu_opt_get_number(legacy_opts, "index", -1);
|
|
|
|
max_devs = if_max_devs[type];
|
|
|
|
if (index != -1) {
|
|
if (bus_id != 0 || unit_id != -1) {
|
|
error_setg(errp, "index cannot be used with bus and unit");
|
|
goto fail;
|
|
}
|
|
bus_id = drive_index_to_bus_id(type, index);
|
|
unit_id = drive_index_to_unit_id(type, index);
|
|
}
|
|
|
|
if (unit_id == -1) {
|
|
unit_id = 0;
|
|
while (drive_get(type, bus_id, unit_id) != NULL) {
|
|
unit_id++;
|
|
if (max_devs && unit_id >= max_devs) {
|
|
unit_id -= max_devs;
|
|
bus_id++;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (max_devs && unit_id >= max_devs) {
|
|
error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1);
|
|
goto fail;
|
|
}
|
|
|
|
if (drive_get(type, bus_id, unit_id) != NULL) {
|
|
error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists",
|
|
bus_id, unit_id, index);
|
|
goto fail;
|
|
}
|
|
|
|
/* no id supplied -> create one */
|
|
if (qemu_opts_id(all_opts) == NULL) {
|
|
char *new_id;
|
|
const char *mediastr = "";
|
|
if (type == IF_IDE || type == IF_SCSI) {
|
|
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
|
|
}
|
|
if (max_devs) {
|
|
new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
|
|
mediastr, unit_id);
|
|
} else {
|
|
new_id = g_strdup_printf("%s%s%i", if_name[type],
|
|
mediastr, unit_id);
|
|
}
|
|
qdict_put_str(bs_opts, "id", new_id);
|
|
g_free(new_id);
|
|
}
|
|
|
|
/* Add virtio block device */
|
|
if (type == IF_VIRTIO) {
|
|
QemuOpts *devopts;
|
|
devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
|
|
&error_abort);
|
|
qemu_opt_set(devopts, "driver", "virtio-blk", &error_abort);
|
|
qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
|
|
&error_abort);
|
|
}
|
|
|
|
filename = qemu_opt_get(legacy_opts, "file");
|
|
|
|
/* Check werror/rerror compatibility with if=... */
|
|
werror = qemu_opt_get(legacy_opts, "werror");
|
|
if (werror != NULL) {
|
|
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
|
|
type != IF_NONE) {
|
|
error_setg(errp, "werror is not supported by this bus type");
|
|
goto fail;
|
|
}
|
|
qdict_put_str(bs_opts, "werror", werror);
|
|
}
|
|
|
|
rerror = qemu_opt_get(legacy_opts, "rerror");
|
|
if (rerror != NULL) {
|
|
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
|
|
type != IF_NONE) {
|
|
error_setg(errp, "rerror is not supported by this bus type");
|
|
goto fail;
|
|
}
|
|
qdict_put_str(bs_opts, "rerror", rerror);
|
|
}
|
|
|
|
/* Actual block device init: Functionality shared with blockdev-add */
|
|
blk = blockdev_init(filename, bs_opts, errp);
|
|
bs_opts = NULL;
|
|
if (!blk) {
|
|
goto fail;
|
|
}
|
|
|
|
/* Create legacy DriveInfo */
|
|
dinfo = g_malloc0(sizeof(*dinfo));
|
|
dinfo->opts = all_opts;
|
|
|
|
dinfo->type = type;
|
|
dinfo->bus = bus_id;
|
|
dinfo->unit = unit_id;
|
|
|
|
blk_set_legacy_dinfo(blk, dinfo);
|
|
|
|
switch(type) {
|
|
case IF_IDE:
|
|
case IF_SCSI:
|
|
case IF_XEN:
|
|
case IF_NONE:
|
|
dinfo->media_cd = media == MEDIA_CDROM;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
fail:
|
|
qemu_opts_del(legacy_opts);
|
|
qobject_unref(bs_opts);
|
|
return dinfo;
|
|
}
|
|
|
|
static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
AioContext *aio_context;
|
|
|
|
bs = bdrv_lookup_bs(name, name, errp);
|
|
if (bs == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (!bdrv_is_root_node(bs)) {
|
|
error_setg(errp, "Need a root block node");
|
|
return NULL;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (!bdrv_is_inserted(bs)) {
|
|
error_setg(errp, "Device has no medium");
|
|
bs = NULL;
|
|
}
|
|
|
|
aio_context_release(aio_context);
|
|
|
|
return bs;
|
|
}
|
|
|
|
static void blockdev_do_action(TransactionAction *action, Error **errp)
|
|
{
|
|
TransactionActionList list;
|
|
|
|
list.value = action;
|
|
list.next = NULL;
|
|
qmp_transaction(&list, NULL, errp);
|
|
}
|
|
|
|
void qmp_blockdev_snapshot_sync(const char *device, const char *node_name,
|
|
const char *snapshot_file,
|
|
const char *snapshot_node_name,
|
|
const char *format,
|
|
bool has_mode, NewImageMode mode, Error **errp)
|
|
{
|
|
BlockdevSnapshotSync snapshot = {
|
|
.device = (char *) device,
|
|
.node_name = (char *) node_name,
|
|
.snapshot_file = (char *) snapshot_file,
|
|
.snapshot_node_name = (char *) snapshot_node_name,
|
|
.format = (char *) format,
|
|
.has_mode = has_mode,
|
|
.mode = mode,
|
|
};
|
|
TransactionAction action = {
|
|
.type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
|
|
.u.blockdev_snapshot_sync.data = &snapshot,
|
|
};
|
|
blockdev_do_action(&action, errp);
|
|
}
|
|
|
|
void qmp_blockdev_snapshot(const char *node, const char *overlay,
|
|
Error **errp)
|
|
{
|
|
BlockdevSnapshot snapshot_data = {
|
|
.node = (char *) node,
|
|
.overlay = (char *) overlay
|
|
};
|
|
TransactionAction action = {
|
|
.type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
|
|
.u.blockdev_snapshot.data = &snapshot_data,
|
|
};
|
|
blockdev_do_action(&action, errp);
|
|
}
|
|
|
|
void qmp_blockdev_snapshot_internal_sync(const char *device,
|
|
const char *name,
|
|
Error **errp)
|
|
{
|
|
BlockdevSnapshotInternal snapshot = {
|
|
.device = (char *) device,
|
|
.name = (char *) name
|
|
};
|
|
TransactionAction action = {
|
|
.type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
|
|
.u.blockdev_snapshot_internal_sync.data = &snapshot,
|
|
};
|
|
blockdev_do_action(&action, errp);
|
|
}
|
|
|
|
SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
|
|
const char *id,
|
|
const char *name,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
AioContext *aio_context;
|
|
QEMUSnapshotInfo sn;
|
|
Error *local_err = NULL;
|
|
SnapshotInfo *info = NULL;
|
|
int ret;
|
|
|
|
bs = qmp_get_root_bs(device, errp);
|
|
if (!bs) {
|
|
return NULL;
|
|
}
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (!id && !name) {
|
|
error_setg(errp, "Name or id must be provided");
|
|
goto out_aio_context;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
|
|
goto out_aio_context;
|
|
}
|
|
|
|
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out_aio_context;
|
|
}
|
|
if (!ret) {
|
|
error_setg(errp,
|
|
"Snapshot with id '%s' and name '%s' does not exist on "
|
|
"device '%s'",
|
|
STR_OR_NULL(id), STR_OR_NULL(name), device);
|
|
goto out_aio_context;
|
|
}
|
|
|
|
bdrv_snapshot_delete(bs, id, name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out_aio_context;
|
|
}
|
|
|
|
aio_context_release(aio_context);
|
|
|
|
info = g_new0(SnapshotInfo, 1);
|
|
info->id = g_strdup(sn.id_str);
|
|
info->name = g_strdup(sn.name);
|
|
info->date_nsec = sn.date_nsec;
|
|
info->date_sec = sn.date_sec;
|
|
info->vm_state_size = sn.vm_state_size;
|
|
info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
|
|
info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
|
|
if (sn.icount != -1ULL) {
|
|
info->icount = sn.icount;
|
|
info->has_icount = true;
|
|
}
|
|
|
|
return info;
|
|
|
|
out_aio_context:
|
|
aio_context_release(aio_context);
|
|
return NULL;
|
|
}
|
|
|
|
/* internal snapshot private data */
|
|
typedef struct InternalSnapshotState {
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo sn;
|
|
bool created;
|
|
} InternalSnapshotState;
|
|
|
|
static void internal_snapshot_abort(void *opaque);
|
|
static void internal_snapshot_clean(void *opaque);
|
|
TransactionActionDrv internal_snapshot_drv = {
|
|
.abort = internal_snapshot_abort,
|
|
.clean = internal_snapshot_clean,
|
|
};
|
|
|
|
static void internal_snapshot_action(BlockdevSnapshotInternal *internal,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
const char *device;
|
|
const char *name;
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo old_sn, *sn;
|
|
bool ret;
|
|
int64_t rt;
|
|
InternalSnapshotState *state = g_new0(InternalSnapshotState, 1);
|
|
AioContext *aio_context;
|
|
int ret1;
|
|
|
|
tran_add(tran, &internal_snapshot_drv, state);
|
|
|
|
device = internal->device;
|
|
name = internal->name;
|
|
|
|
bs = qmp_get_root_bs(device, errp);
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
state->bs = bs;
|
|
|
|
/* Paired with .clean() */
|
|
bdrv_drained_begin(bs);
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
|
|
goto out;
|
|
}
|
|
|
|
if (bdrv_is_read_only(bs)) {
|
|
error_setg(errp, "Device '%s' is read only", device);
|
|
goto out;
|
|
}
|
|
|
|
if (!bdrv_can_snapshot(bs)) {
|
|
error_setg(errp, "Block format '%s' used by device '%s' "
|
|
"does not support internal snapshots",
|
|
bs->drv->format_name, device);
|
|
goto out;
|
|
}
|
|
|
|
if (!strlen(name)) {
|
|
error_setg(errp, "Name is empty");
|
|
goto out;
|
|
}
|
|
|
|
/* check whether a snapshot with name exist */
|
|
ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out;
|
|
} else if (ret) {
|
|
error_setg(errp,
|
|
"Snapshot with name '%s' already exists on device '%s'",
|
|
name, device);
|
|
goto out;
|
|
}
|
|
|
|
/* 3. take the snapshot */
|
|
sn = &state->sn;
|
|
pstrcpy(sn->name, sizeof(sn->name), name);
|
|
rt = g_get_real_time();
|
|
sn->date_sec = rt / G_USEC_PER_SEC;
|
|
sn->date_nsec = (rt % G_USEC_PER_SEC) * 1000;
|
|
sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
if (replay_mode != REPLAY_MODE_NONE) {
|
|
sn->icount = replay_get_current_icount();
|
|
} else {
|
|
sn->icount = -1ULL;
|
|
}
|
|
|
|
ret1 = bdrv_snapshot_create(bs, sn);
|
|
if (ret1 < 0) {
|
|
error_setg_errno(errp, -ret1,
|
|
"Failed to create snapshot '%s' on device '%s'",
|
|
name, device);
|
|
goto out;
|
|
}
|
|
|
|
/* 4. succeed, mark a snapshot is created */
|
|
state->created = true;
|
|
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void internal_snapshot_abort(void *opaque)
|
|
{
|
|
InternalSnapshotState *state = opaque;
|
|
BlockDriverState *bs = state->bs;
|
|
QEMUSnapshotInfo *sn = &state->sn;
|
|
AioContext *aio_context;
|
|
Error *local_error = NULL;
|
|
|
|
if (!state->created) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(state->bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
|
|
error_reportf_err(local_error,
|
|
"Failed to delete snapshot with id '%s' and "
|
|
"name '%s' on device '%s' in abort: ",
|
|
sn->id_str, sn->name,
|
|
bdrv_get_device_name(bs));
|
|
}
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void internal_snapshot_clean(void *opaque)
|
|
{
|
|
g_autofree InternalSnapshotState *state = opaque;
|
|
AioContext *aio_context;
|
|
|
|
if (!state->bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(state->bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
bdrv_drained_end(state->bs);
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
/* external snapshot private data */
|
|
typedef struct ExternalSnapshotState {
|
|
BlockDriverState *old_bs;
|
|
BlockDriverState *new_bs;
|
|
bool overlay_appended;
|
|
} ExternalSnapshotState;
|
|
|
|
static void external_snapshot_commit(void *opaque);
|
|
static void external_snapshot_abort(void *opaque);
|
|
static void external_snapshot_clean(void *opaque);
|
|
TransactionActionDrv external_snapshot_drv = {
|
|
.commit = external_snapshot_commit,
|
|
.abort = external_snapshot_abort,
|
|
.clean = external_snapshot_clean,
|
|
};
|
|
|
|
static void external_snapshot_action(TransactionAction *action,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
int ret;
|
|
int flags = 0;
|
|
QDict *options = NULL;
|
|
Error *local_err = NULL;
|
|
/* Device and node name of the image to generate the snapshot from */
|
|
const char *device;
|
|
const char *node_name;
|
|
/* Reference to the new image (for 'blockdev-snapshot') */
|
|
const char *snapshot_ref;
|
|
/* File name of the new image (for 'blockdev-snapshot-sync') */
|
|
const char *new_image_file;
|
|
ExternalSnapshotState *state = g_new0(ExternalSnapshotState, 1);
|
|
AioContext *aio_context;
|
|
uint64_t perm, shared;
|
|
|
|
tran_add(tran, &external_snapshot_drv, state);
|
|
|
|
/* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
|
|
* purpose but a different set of parameters */
|
|
switch (action->type) {
|
|
case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
|
|
{
|
|
BlockdevSnapshot *s = action->u.blockdev_snapshot.data;
|
|
device = s->node;
|
|
node_name = s->node;
|
|
new_image_file = NULL;
|
|
snapshot_ref = s->overlay;
|
|
}
|
|
break;
|
|
case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
|
|
{
|
|
BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
|
|
device = s->device;
|
|
node_name = s->node_name;
|
|
new_image_file = s->snapshot_file;
|
|
snapshot_ref = NULL;
|
|
}
|
|
break;
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
/* start processing */
|
|
|
|
state->old_bs = bdrv_lookup_bs(device, node_name, errp);
|
|
if (!state->old_bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(state->old_bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
/* Paired with .clean() */
|
|
bdrv_drained_begin(state->old_bs);
|
|
|
|
if (!bdrv_is_inserted(state->old_bs)) {
|
|
error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
goto out;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(state->old_bs,
|
|
BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
|
|
goto out;
|
|
}
|
|
|
|
if (!bdrv_is_read_only(state->old_bs)) {
|
|
if (bdrv_flush(state->old_bs)) {
|
|
error_setg(errp, QERR_IO_ERROR);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
|
|
BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
|
|
const char *format = s->format ?: "qcow2";
|
|
enum NewImageMode mode;
|
|
const char *snapshot_node_name = s->snapshot_node_name;
|
|
|
|
if (node_name && !snapshot_node_name) {
|
|
error_setg(errp, "New overlay node-name missing");
|
|
goto out;
|
|
}
|
|
|
|
if (snapshot_node_name &&
|
|
bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
|
|
error_setg(errp, "New overlay node-name already in use");
|
|
goto out;
|
|
}
|
|
|
|
flags = state->old_bs->open_flags;
|
|
flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ);
|
|
flags |= BDRV_O_NO_BACKING;
|
|
|
|
/* create new image w/backing file */
|
|
mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
|
int64_t size = bdrv_getlength(state->old_bs);
|
|
if (size < 0) {
|
|
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
|
goto out;
|
|
}
|
|
bdrv_refresh_filename(state->old_bs);
|
|
|
|
aio_context_release(aio_context);
|
|
bdrv_img_create(new_image_file, format,
|
|
state->old_bs->filename,
|
|
state->old_bs->drv->format_name,
|
|
NULL, size, flags, false, &local_err);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
options = qdict_new();
|
|
if (snapshot_node_name) {
|
|
qdict_put_str(options, "node-name", snapshot_node_name);
|
|
}
|
|
qdict_put_str(options, "driver", format);
|
|
}
|
|
aio_context_release(aio_context);
|
|
|
|
aio_context_acquire(qemu_get_aio_context());
|
|
state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags,
|
|
errp);
|
|
aio_context_release(qemu_get_aio_context());
|
|
|
|
/* We will manually add the backing_hd field to the bs later */
|
|
if (!state->new_bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context_acquire(aio_context);
|
|
|
|
/*
|
|
* Allow attaching a backing file to an overlay that's already in use only
|
|
* if the parents don't assume that they are already seeing a valid image.
|
|
* (Specifically, allow it as a mirror target, which is write-only access.)
|
|
*/
|
|
bdrv_get_cumulative_perm(state->new_bs, &perm, &shared);
|
|
if (perm & BLK_PERM_CONSISTENT_READ) {
|
|
error_setg(errp, "The overlay is already in use");
|
|
goto out;
|
|
}
|
|
|
|
if (state->new_bs->drv->is_filter) {
|
|
error_setg(errp, "Filters cannot be used as overlays");
|
|
goto out;
|
|
}
|
|
|
|
if (bdrv_cow_child(state->new_bs)) {
|
|
error_setg(errp, "The overlay already has a backing image");
|
|
goto out;
|
|
}
|
|
|
|
if (!state->new_bs->drv->supports_backing) {
|
|
error_setg(errp, "The overlay does not support backing images");
|
|
goto out;
|
|
}
|
|
|
|
ret = bdrv_append(state->new_bs, state->old_bs, errp);
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
state->overlay_appended = true;
|
|
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void external_snapshot_commit(void *opaque)
|
|
{
|
|
ExternalSnapshotState *state = opaque;
|
|
AioContext *aio_context;
|
|
|
|
aio_context = bdrv_get_aio_context(state->old_bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
/* We don't need (or want) to use the transactional
|
|
* bdrv_reopen_multiple() across all the entries at once, because we
|
|
* don't want to abort all of them if one of them fails the reopen */
|
|
if (!qatomic_read(&state->old_bs->copy_on_read)) {
|
|
bdrv_reopen_set_read_only(state->old_bs, true, NULL);
|
|
}
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void external_snapshot_abort(void *opaque)
|
|
{
|
|
ExternalSnapshotState *state = opaque;
|
|
if (state->new_bs) {
|
|
if (state->overlay_appended) {
|
|
AioContext *aio_context;
|
|
AioContext *tmp_context;
|
|
int ret;
|
|
|
|
aio_context = bdrv_get_aio_context(state->old_bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd()
|
|
close state->old_bs; we need it */
|
|
bdrv_set_backing_hd(state->new_bs, NULL, &error_abort);
|
|
|
|
/*
|
|
* The call to bdrv_set_backing_hd() above returns state->old_bs to
|
|
* the main AioContext. As we're still going to be using it, return
|
|
* it to the AioContext it was before.
|
|
*/
|
|
tmp_context = bdrv_get_aio_context(state->old_bs);
|
|
if (aio_context != tmp_context) {
|
|
aio_context_release(aio_context);
|
|
aio_context_acquire(tmp_context);
|
|
|
|
ret = bdrv_try_change_aio_context(state->old_bs,
|
|
aio_context, NULL, NULL);
|
|
assert(ret == 0);
|
|
|
|
aio_context_release(tmp_context);
|
|
aio_context_acquire(aio_context);
|
|
}
|
|
|
|
bdrv_replace_node(state->new_bs, state->old_bs, &error_abort);
|
|
bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void external_snapshot_clean(void *opaque)
|
|
{
|
|
g_autofree ExternalSnapshotState *state = opaque;
|
|
AioContext *aio_context;
|
|
|
|
if (!state->old_bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(state->old_bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
bdrv_drained_end(state->old_bs);
|
|
bdrv_unref(state->new_bs);
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
typedef struct DriveBackupState {
|
|
BlockDriverState *bs;
|
|
BlockJob *job;
|
|
} DriveBackupState;
|
|
|
|
static BlockJob *do_backup_common(BackupCommon *backup,
|
|
BlockDriverState *bs,
|
|
BlockDriverState *target_bs,
|
|
AioContext *aio_context,
|
|
JobTxn *txn, Error **errp);
|
|
|
|
static void drive_backup_commit(void *opaque);
|
|
static void drive_backup_abort(void *opaque);
|
|
static void drive_backup_clean(void *opaque);
|
|
TransactionActionDrv drive_backup_drv = {
|
|
.commit = drive_backup_commit,
|
|
.abort = drive_backup_abort,
|
|
.clean = drive_backup_clean,
|
|
};
|
|
|
|
static void drive_backup_action(DriveBackup *backup,
|
|
JobTxn *block_job_txn,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
DriveBackupState *state = g_new0(DriveBackupState, 1);
|
|
BlockDriverState *bs;
|
|
BlockDriverState *target_bs;
|
|
BlockDriverState *source = NULL;
|
|
AioContext *aio_context;
|
|
AioContext *old_context;
|
|
const char *format;
|
|
QDict *options;
|
|
Error *local_err = NULL;
|
|
int flags;
|
|
int64_t size;
|
|
bool set_backing_hd = false;
|
|
int ret;
|
|
|
|
tran_add(tran, &drive_backup_drv, state);
|
|
|
|
if (!backup->has_mode) {
|
|
backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
}
|
|
|
|
bs = bdrv_lookup_bs(backup->device, backup->device, errp);
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
if (!bs->drv) {
|
|
error_setg(errp, "Device has no medium");
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
state->bs = bs;
|
|
/* Paired with .clean() */
|
|
bdrv_drained_begin(bs);
|
|
|
|
format = backup->format;
|
|
if (!format && backup->mode != NEW_IMAGE_MODE_EXISTING) {
|
|
format = bs->drv->format_name;
|
|
}
|
|
|
|
/* Early check to avoid creating target */
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
|
|
goto out;
|
|
}
|
|
|
|
flags = bs->open_flags | BDRV_O_RDWR;
|
|
|
|
/*
|
|
* See if we have a backing HD we can use to create our new image
|
|
* on top of.
|
|
*/
|
|
if (backup->sync == MIRROR_SYNC_MODE_TOP) {
|
|
/*
|
|
* Backup will not replace the source by the target, so none
|
|
* of the filters skipped here will be removed (in contrast to
|
|
* mirror). Therefore, we can skip all of them when looking
|
|
* for the first COW relationship.
|
|
*/
|
|
source = bdrv_cow_bs(bdrv_skip_filters(bs));
|
|
if (!source) {
|
|
backup->sync = MIRROR_SYNC_MODE_FULL;
|
|
}
|
|
}
|
|
if (backup->sync == MIRROR_SYNC_MODE_NONE) {
|
|
source = bs;
|
|
flags |= BDRV_O_NO_BACKING;
|
|
set_backing_hd = true;
|
|
}
|
|
|
|
size = bdrv_getlength(bs);
|
|
if (size < 0) {
|
|
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
|
goto out;
|
|
}
|
|
|
|
if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
|
|
assert(format);
|
|
if (source) {
|
|
/* Implicit filters should not appear in the filename */
|
|
BlockDriverState *explicit_backing =
|
|
bdrv_skip_implicit_filters(source);
|
|
|
|
bdrv_refresh_filename(explicit_backing);
|
|
bdrv_img_create(backup->target, format,
|
|
explicit_backing->filename,
|
|
explicit_backing->drv->format_name, NULL,
|
|
size, flags, false, &local_err);
|
|
} else {
|
|
bdrv_img_create(backup->target, format, NULL, NULL, NULL,
|
|
size, flags, false, &local_err);
|
|
}
|
|
}
|
|
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out;
|
|
}
|
|
|
|
options = qdict_new();
|
|
qdict_put_str(options, "discard", "unmap");
|
|
qdict_put_str(options, "detect-zeroes", "unmap");
|
|
if (format) {
|
|
qdict_put_str(options, "driver", format);
|
|
}
|
|
aio_context_release(aio_context);
|
|
|
|
aio_context_acquire(qemu_get_aio_context());
|
|
target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
|
|
aio_context_release(qemu_get_aio_context());
|
|
|
|
if (!target_bs) {
|
|
return;
|
|
}
|
|
|
|
/* Honor bdrv_try_change_aio_context() context acquisition requirements. */
|
|
old_context = bdrv_get_aio_context(target_bs);
|
|
aio_context_acquire(old_context);
|
|
|
|
ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
|
|
if (ret < 0) {
|
|
bdrv_unref(target_bs);
|
|
aio_context_release(old_context);
|
|
return;
|
|
}
|
|
|
|
aio_context_release(old_context);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (set_backing_hd) {
|
|
if (bdrv_set_backing_hd(target_bs, source, errp) < 0) {
|
|
goto unref;
|
|
}
|
|
}
|
|
|
|
state->job = do_backup_common(qapi_DriveBackup_base(backup),
|
|
bs, target_bs, aio_context,
|
|
block_job_txn, errp);
|
|
|
|
unref:
|
|
bdrv_unref(target_bs);
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void drive_backup_commit(void *opaque)
|
|
{
|
|
DriveBackupState *state = opaque;
|
|
AioContext *aio_context;
|
|
|
|
aio_context = bdrv_get_aio_context(state->bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
assert(state->job);
|
|
job_start(&state->job->job);
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void drive_backup_abort(void *opaque)
|
|
{
|
|
DriveBackupState *state = opaque;
|
|
|
|
if (state->job) {
|
|
job_cancel_sync(&state->job->job, true);
|
|
}
|
|
}
|
|
|
|
static void drive_backup_clean(void *opaque)
|
|
{
|
|
g_autofree DriveBackupState *state = opaque;
|
|
AioContext *aio_context;
|
|
|
|
if (!state->bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(state->bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
bdrv_drained_end(state->bs);
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
typedef struct BlockdevBackupState {
|
|
BlockDriverState *bs;
|
|
BlockJob *job;
|
|
} BlockdevBackupState;
|
|
|
|
static void blockdev_backup_commit(void *opaque);
|
|
static void blockdev_backup_abort(void *opaque);
|
|
static void blockdev_backup_clean(void *opaque);
|
|
TransactionActionDrv blockdev_backup_drv = {
|
|
.commit = blockdev_backup_commit,
|
|
.abort = blockdev_backup_abort,
|
|
.clean = blockdev_backup_clean,
|
|
};
|
|
|
|
static void blockdev_backup_action(BlockdevBackup *backup,
|
|
JobTxn *block_job_txn,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
BlockdevBackupState *state = g_new0(BlockdevBackupState, 1);
|
|
BlockDriverState *bs;
|
|
BlockDriverState *target_bs;
|
|
AioContext *aio_context;
|
|
AioContext *old_context;
|
|
int ret;
|
|
|
|
tran_add(tran, &blockdev_backup_drv, state);
|
|
|
|
bs = bdrv_lookup_bs(backup->device, backup->device, errp);
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
target_bs = bdrv_lookup_bs(backup->target, backup->target, errp);
|
|
if (!target_bs) {
|
|
return;
|
|
}
|
|
|
|
/* Honor bdrv_try_change_aio_context() context acquisition requirements. */
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
old_context = bdrv_get_aio_context(target_bs);
|
|
aio_context_acquire(old_context);
|
|
|
|
ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
|
|
if (ret < 0) {
|
|
aio_context_release(old_context);
|
|
return;
|
|
}
|
|
|
|
aio_context_release(old_context);
|
|
aio_context_acquire(aio_context);
|
|
state->bs = bs;
|
|
|
|
/* Paired with .clean() */
|
|
bdrv_drained_begin(state->bs);
|
|
|
|
state->job = do_backup_common(qapi_BlockdevBackup_base(backup),
|
|
bs, target_bs, aio_context,
|
|
block_job_txn, errp);
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void blockdev_backup_commit(void *opaque)
|
|
{
|
|
BlockdevBackupState *state = opaque;
|
|
AioContext *aio_context;
|
|
|
|
aio_context = bdrv_get_aio_context(state->bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
assert(state->job);
|
|
job_start(&state->job->job);
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void blockdev_backup_abort(void *opaque)
|
|
{
|
|
BlockdevBackupState *state = opaque;
|
|
|
|
if (state->job) {
|
|
job_cancel_sync(&state->job->job, true);
|
|
}
|
|
}
|
|
|
|
static void blockdev_backup_clean(void *opaque)
|
|
{
|
|
g_autofree BlockdevBackupState *state = opaque;
|
|
AioContext *aio_context;
|
|
|
|
if (!state->bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(state->bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
bdrv_drained_end(state->bs);
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
typedef struct BlockDirtyBitmapState {
|
|
BdrvDirtyBitmap *bitmap;
|
|
BlockDriverState *bs;
|
|
HBitmap *backup;
|
|
bool was_enabled;
|
|
} BlockDirtyBitmapState;
|
|
|
|
static void block_dirty_bitmap_add_abort(void *opaque);
|
|
TransactionActionDrv block_dirty_bitmap_add_drv = {
|
|
.abort = block_dirty_bitmap_add_abort,
|
|
.clean = g_free,
|
|
};
|
|
|
|
static void block_dirty_bitmap_add_action(BlockDirtyBitmapAdd *action,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
|
|
|
|
tran_add(tran, &block_dirty_bitmap_add_drv, state);
|
|
|
|
/* AIO context taken and released within qmp_block_dirty_bitmap_add */
|
|
qmp_block_dirty_bitmap_add(action->node, action->name,
|
|
action->has_granularity, action->granularity,
|
|
action->has_persistent, action->persistent,
|
|
action->has_disabled, action->disabled,
|
|
&local_err);
|
|
|
|
if (!local_err) {
|
|
state->bitmap = block_dirty_bitmap_lookup(action->node, action->name,
|
|
NULL, &error_abort);
|
|
} else {
|
|
error_propagate(errp, local_err);
|
|
}
|
|
}
|
|
|
|
static void block_dirty_bitmap_add_abort(void *opaque)
|
|
{
|
|
BlockDirtyBitmapState *state = opaque;
|
|
|
|
if (state->bitmap) {
|
|
bdrv_release_dirty_bitmap(state->bitmap);
|
|
}
|
|
}
|
|
|
|
static void block_dirty_bitmap_restore(void *opaque);
|
|
static void block_dirty_bitmap_free_backup(void *opaque);
|
|
TransactionActionDrv block_dirty_bitmap_clear_drv = {
|
|
.abort = block_dirty_bitmap_restore,
|
|
.commit = block_dirty_bitmap_free_backup,
|
|
.clean = g_free,
|
|
};
|
|
|
|
static void block_dirty_bitmap_clear_action(BlockDirtyBitmap *action,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
|
|
|
|
tran_add(tran, &block_dirty_bitmap_clear_drv, state);
|
|
|
|
state->bitmap = block_dirty_bitmap_lookup(action->node,
|
|
action->name,
|
|
&state->bs,
|
|
errp);
|
|
if (!state->bitmap) {
|
|
return;
|
|
}
|
|
|
|
if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_DEFAULT, errp)) {
|
|
return;
|
|
}
|
|
|
|
bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
|
|
}
|
|
|
|
static void block_dirty_bitmap_restore(void *opaque)
|
|
{
|
|
BlockDirtyBitmapState *state = opaque;
|
|
|
|
if (state->backup) {
|
|
bdrv_restore_dirty_bitmap(state->bitmap, state->backup);
|
|
}
|
|
}
|
|
|
|
static void block_dirty_bitmap_free_backup(void *opaque)
|
|
{
|
|
BlockDirtyBitmapState *state = opaque;
|
|
|
|
hbitmap_free(state->backup);
|
|
}
|
|
|
|
static void block_dirty_bitmap_enable_abort(void *opaque);
|
|
TransactionActionDrv block_dirty_bitmap_enable_drv = {
|
|
.abort = block_dirty_bitmap_enable_abort,
|
|
.clean = g_free,
|
|
};
|
|
|
|
static void block_dirty_bitmap_enable_action(BlockDirtyBitmap *action,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
|
|
|
|
tran_add(tran, &block_dirty_bitmap_enable_drv, state);
|
|
|
|
state->bitmap = block_dirty_bitmap_lookup(action->node,
|
|
action->name,
|
|
NULL,
|
|
errp);
|
|
if (!state->bitmap) {
|
|
return;
|
|
}
|
|
|
|
if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
|
|
return;
|
|
}
|
|
|
|
state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
|
|
bdrv_enable_dirty_bitmap(state->bitmap);
|
|
}
|
|
|
|
static void block_dirty_bitmap_enable_abort(void *opaque)
|
|
{
|
|
BlockDirtyBitmapState *state = opaque;
|
|
|
|
if (!state->was_enabled) {
|
|
bdrv_disable_dirty_bitmap(state->bitmap);
|
|
}
|
|
}
|
|
|
|
static void block_dirty_bitmap_disable_abort(void *opaque);
|
|
TransactionActionDrv block_dirty_bitmap_disable_drv = {
|
|
.abort = block_dirty_bitmap_disable_abort,
|
|
.clean = g_free,
|
|
};
|
|
|
|
static void block_dirty_bitmap_disable_action(BlockDirtyBitmap *action,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
|
|
|
|
tran_add(tran, &block_dirty_bitmap_disable_drv, state);
|
|
|
|
state->bitmap = block_dirty_bitmap_lookup(action->node,
|
|
action->name,
|
|
NULL,
|
|
errp);
|
|
if (!state->bitmap) {
|
|
return;
|
|
}
|
|
|
|
if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
|
|
return;
|
|
}
|
|
|
|
state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
|
|
bdrv_disable_dirty_bitmap(state->bitmap);
|
|
}
|
|
|
|
static void block_dirty_bitmap_disable_abort(void *opaque)
|
|
{
|
|
BlockDirtyBitmapState *state = opaque;
|
|
|
|
if (state->was_enabled) {
|
|
bdrv_enable_dirty_bitmap(state->bitmap);
|
|
}
|
|
}
|
|
|
|
TransactionActionDrv block_dirty_bitmap_merge_drv = {
|
|
.commit = block_dirty_bitmap_free_backup,
|
|
.abort = block_dirty_bitmap_restore,
|
|
.clean = g_free,
|
|
};
|
|
|
|
static void block_dirty_bitmap_merge_action(BlockDirtyBitmapMerge *action,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
|
|
|
|
tran_add(tran, &block_dirty_bitmap_merge_drv, state);
|
|
|
|
state->bitmap = block_dirty_bitmap_merge(action->node, action->target,
|
|
action->bitmaps, &state->backup,
|
|
errp);
|
|
}
|
|
|
|
static void block_dirty_bitmap_remove_commit(void *opaque);
|
|
static void block_dirty_bitmap_remove_abort(void *opaque);
|
|
TransactionActionDrv block_dirty_bitmap_remove_drv = {
|
|
.commit = block_dirty_bitmap_remove_commit,
|
|
.abort = block_dirty_bitmap_remove_abort,
|
|
.clean = g_free,
|
|
};
|
|
|
|
static void block_dirty_bitmap_remove_action(BlockDirtyBitmap *action,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
BlockDirtyBitmapState *state = g_new0(BlockDirtyBitmapState, 1);
|
|
|
|
tran_add(tran, &block_dirty_bitmap_remove_drv, state);
|
|
|
|
|
|
state->bitmap = block_dirty_bitmap_remove(action->node, action->name,
|
|
false, &state->bs, errp);
|
|
if (state->bitmap) {
|
|
bdrv_dirty_bitmap_skip_store(state->bitmap, true);
|
|
bdrv_dirty_bitmap_set_busy(state->bitmap, true);
|
|
}
|
|
}
|
|
|
|
static void block_dirty_bitmap_remove_abort(void *opaque)
|
|
{
|
|
BlockDirtyBitmapState *state = opaque;
|
|
|
|
if (state->bitmap) {
|
|
bdrv_dirty_bitmap_skip_store(state->bitmap, false);
|
|
bdrv_dirty_bitmap_set_busy(state->bitmap, false);
|
|
}
|
|
}
|
|
|
|
static void block_dirty_bitmap_remove_commit(void *opaque)
|
|
{
|
|
BlockDirtyBitmapState *state = opaque;
|
|
|
|
bdrv_dirty_bitmap_set_busy(state->bitmap, false);
|
|
bdrv_release_dirty_bitmap(state->bitmap);
|
|
}
|
|
|
|
static void abort_commit(void *opaque);
|
|
TransactionActionDrv abort_drv = {
|
|
.commit = abort_commit,
|
|
};
|
|
|
|
static void abort_action(Transaction *tran, Error **errp)
|
|
{
|
|
tran_add(tran, &abort_drv, NULL);
|
|
error_setg(errp, "Transaction aborted using Abort action");
|
|
}
|
|
|
|
static void abort_commit(void *opaque)
|
|
{
|
|
g_assert_not_reached(); /* this action never succeeds */
|
|
}
|
|
|
|
static void transaction_action(TransactionAction *act, JobTxn *block_job_txn,
|
|
Transaction *tran, Error **errp)
|
|
{
|
|
switch (act->type) {
|
|
case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
|
|
case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
|
|
external_snapshot_action(act, tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_DRIVE_BACKUP:
|
|
drive_backup_action(act->u.drive_backup.data,
|
|
block_job_txn, tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP:
|
|
blockdev_backup_action(act->u.blockdev_backup.data,
|
|
block_job_txn, tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_ABORT:
|
|
abort_action(tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC:
|
|
internal_snapshot_action(act->u.blockdev_snapshot_internal_sync.data,
|
|
tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD:
|
|
block_dirty_bitmap_add_action(act->u.block_dirty_bitmap_add.data,
|
|
tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR:
|
|
block_dirty_bitmap_clear_action(act->u.block_dirty_bitmap_clear.data,
|
|
tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE:
|
|
block_dirty_bitmap_enable_action(act->u.block_dirty_bitmap_enable.data,
|
|
tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE:
|
|
block_dirty_bitmap_disable_action(
|
|
act->u.block_dirty_bitmap_disable.data, tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE:
|
|
block_dirty_bitmap_merge_action(act->u.block_dirty_bitmap_merge.data,
|
|
tran, errp);
|
|
return;
|
|
case TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE:
|
|
block_dirty_bitmap_remove_action(act->u.block_dirty_bitmap_remove.data,
|
|
tran, errp);
|
|
return;
|
|
/*
|
|
* Where are transactions for MIRROR, COMMIT and STREAM?
|
|
* Although these blockjobs use transaction callbacks like the backup job,
|
|
* these jobs do not necessarily adhere to transaction semantics.
|
|
* These jobs may not fully undo all of their actions on abort, nor do they
|
|
* necessarily work in transactions with more than one job in them.
|
|
*/
|
|
case TRANSACTION_ACTION_KIND__MAX:
|
|
default:
|
|
g_assert_not_reached();
|
|
};
|
|
}
|
|
|
|
|
|
/*
|
|
* 'Atomic' group operations. The operations are performed as a set, and if
|
|
* any fail then we roll back all operations in the group.
|
|
*
|
|
* Always run under BQL.
|
|
*/
|
|
void qmp_transaction(TransactionActionList *actions,
|
|
struct TransactionProperties *properties,
|
|
Error **errp)
|
|
{
|
|
TransactionActionList *act;
|
|
JobTxn *block_job_txn = NULL;
|
|
Error *local_err = NULL;
|
|
Transaction *tran;
|
|
ActionCompletionMode comp_mode =
|
|
properties ? properties->completion_mode :
|
|
ACTION_COMPLETION_MODE_INDIVIDUAL;
|
|
|
|
GLOBAL_STATE_CODE();
|
|
|
|
/* Does this transaction get canceled as a group on failure?
|
|
* If not, we don't really need to make a JobTxn.
|
|
*/
|
|
if (comp_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
|
|
for (act = actions; act; act = act->next) {
|
|
TransactionActionKind type = act->value->type;
|
|
|
|
if (type != TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP &&
|
|
type != TRANSACTION_ACTION_KIND_DRIVE_BACKUP)
|
|
{
|
|
error_setg(errp,
|
|
"Action '%s' does not support transaction property "
|
|
"completion-mode = %s",
|
|
TransactionActionKind_str(type),
|
|
ActionCompletionMode_str(comp_mode));
|
|
return;
|
|
}
|
|
}
|
|
|
|
block_job_txn = job_txn_new();
|
|
}
|
|
|
|
/* drain all i/o before any operations */
|
|
bdrv_drain_all();
|
|
|
|
tran = tran_new();
|
|
|
|
/* We don't do anything in this loop that commits us to the operations */
|
|
for (act = actions; act; act = act->next) {
|
|
transaction_action(act->value, block_job_txn, tran, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto delete_and_fail;
|
|
}
|
|
}
|
|
|
|
tran_commit(tran);
|
|
|
|
/* success */
|
|
goto exit;
|
|
|
|
delete_and_fail:
|
|
/* failure, and it is all-or-none; roll back all operations */
|
|
tran_abort(tran);
|
|
exit:
|
|
job_txn_unref(block_job_txn);
|
|
}
|
|
|
|
BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
|
|
const char *name,
|
|
Error **errp)
|
|
{
|
|
BdrvDirtyBitmap *bitmap;
|
|
BlockDriverState *bs;
|
|
BlockDirtyBitmapSha256 *ret = NULL;
|
|
char *sha256;
|
|
|
|
bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
|
|
if (!bitmap || !bs) {
|
|
return NULL;
|
|
}
|
|
|
|
sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp);
|
|
if (sha256 == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
ret = g_new(BlockDirtyBitmapSha256, 1);
|
|
ret->sha256 = sha256;
|
|
|
|
return ret;
|
|
}
|
|
|
|
void coroutine_fn qmp_block_resize(const char *device, const char *node_name,
|
|
int64_t size, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
BlockBackend *blk;
|
|
BlockDriverState *bs;
|
|
AioContext *old_ctx;
|
|
|
|
bs = bdrv_lookup_bs(device, node_name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (size < 0) {
|
|
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
|
|
return;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
|
|
error_setg(errp, QERR_DEVICE_IN_USE, device);
|
|
return;
|
|
}
|
|
|
|
blk = blk_co_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, errp);
|
|
if (!blk) {
|
|
return;
|
|
}
|
|
|
|
bdrv_co_lock(bs);
|
|
bdrv_drained_begin(bs);
|
|
bdrv_co_unlock(bs);
|
|
|
|
old_ctx = bdrv_co_enter(bs);
|
|
blk_co_truncate(blk, size, false, PREALLOC_MODE_OFF, 0, errp);
|
|
bdrv_co_leave(bs, old_ctx);
|
|
|
|
bdrv_co_lock(bs);
|
|
bdrv_drained_end(bs);
|
|
blk_co_unref(blk);
|
|
bdrv_co_unlock(bs);
|
|
}
|
|
|
|
void qmp_block_stream(const char *job_id, const char *device,
|
|
const char *base,
|
|
const char *base_node,
|
|
const char *backing_file,
|
|
const char *bottom,
|
|
bool has_speed, int64_t speed,
|
|
bool has_on_error, BlockdevOnError on_error,
|
|
const char *filter_node_name,
|
|
bool has_auto_finalize, bool auto_finalize,
|
|
bool has_auto_dismiss, bool auto_dismiss,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs, *iter, *iter_end;
|
|
BlockDriverState *base_bs = NULL;
|
|
BlockDriverState *bottom_bs = NULL;
|
|
AioContext *aio_context;
|
|
Error *local_err = NULL;
|
|
int job_flags = JOB_DEFAULT;
|
|
|
|
if (base && base_node) {
|
|
error_setg(errp, "'base' and 'base-node' cannot be specified "
|
|
"at the same time");
|
|
return;
|
|
}
|
|
|
|
if (base && bottom) {
|
|
error_setg(errp, "'base' and 'bottom' cannot be specified "
|
|
"at the same time");
|
|
return;
|
|
}
|
|
|
|
if (bottom && base_node) {
|
|
error_setg(errp, "'bottom' and 'base-node' cannot be specified "
|
|
"at the same time");
|
|
return;
|
|
}
|
|
|
|
if (!has_on_error) {
|
|
on_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
|
|
bs = bdrv_lookup_bs(device, device, errp);
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (base) {
|
|
base_bs = bdrv_find_backing_image(bs, base);
|
|
if (base_bs == NULL) {
|
|
error_setg(errp, "Can't find '%s' in the backing chain", base);
|
|
goto out;
|
|
}
|
|
assert(bdrv_get_aio_context(base_bs) == aio_context);
|
|
}
|
|
|
|
if (base_node) {
|
|
base_bs = bdrv_lookup_bs(NULL, base_node, errp);
|
|
if (!base_bs) {
|
|
goto out;
|
|
}
|
|
if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) {
|
|
error_setg(errp, "Node '%s' is not a backing image of '%s'",
|
|
base_node, device);
|
|
goto out;
|
|
}
|
|
assert(bdrv_get_aio_context(base_bs) == aio_context);
|
|
bdrv_refresh_filename(base_bs);
|
|
}
|
|
|
|
if (bottom) {
|
|
bottom_bs = bdrv_lookup_bs(NULL, bottom, errp);
|
|
if (!bottom_bs) {
|
|
goto out;
|
|
}
|
|
if (!bottom_bs->drv) {
|
|
error_setg(errp, "Node '%s' is not open", bottom);
|
|
goto out;
|
|
}
|
|
if (bottom_bs->drv->is_filter) {
|
|
error_setg(errp, "Node '%s' is a filter, use a non-filter node "
|
|
"as 'bottom'", bottom);
|
|
goto out;
|
|
}
|
|
if (!bdrv_chain_contains(bs, bottom_bs)) {
|
|
error_setg(errp, "Node '%s' is not in a chain starting from '%s'",
|
|
bottom, device);
|
|
goto out;
|
|
}
|
|
assert(bdrv_get_aio_context(bottom_bs) == aio_context);
|
|
}
|
|
|
|
/*
|
|
* Check for op blockers in the whole chain between bs and base (or bottom)
|
|
*/
|
|
iter_end = bottom ? bdrv_filter_or_cow_bs(bottom_bs) : base_bs;
|
|
for (iter = bs; iter && iter != iter_end;
|
|
iter = bdrv_filter_or_cow_bs(iter))
|
|
{
|
|
if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* if we are streaming the entire chain, the result will have no backing
|
|
* file, and specifying one is therefore an error */
|
|
if (!base_bs && backing_file) {
|
|
error_setg(errp, "backing file specified, but streaming the "
|
|
"entire chain");
|
|
goto out;
|
|
}
|
|
|
|
if (has_auto_finalize && !auto_finalize) {
|
|
job_flags |= JOB_MANUAL_FINALIZE;
|
|
}
|
|
if (has_auto_dismiss && !auto_dismiss) {
|
|
job_flags |= JOB_MANUAL_DISMISS;
|
|
}
|
|
|
|
stream_start(job_id, bs, base_bs, backing_file,
|
|
bottom_bs, job_flags, has_speed ? speed : 0, on_error,
|
|
filter_node_name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out;
|
|
}
|
|
|
|
trace_qmp_block_stream(bs);
|
|
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
void qmp_block_commit(const char *job_id, const char *device,
|
|
const char *base_node,
|
|
const char *base,
|
|
const char *top_node,
|
|
const char *top,
|
|
const char *backing_file,
|
|
bool has_speed, int64_t speed,
|
|
bool has_on_error, BlockdevOnError on_error,
|
|
const char *filter_node_name,
|
|
bool has_auto_finalize, bool auto_finalize,
|
|
bool has_auto_dismiss, bool auto_dismiss,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *iter;
|
|
BlockDriverState *base_bs, *top_bs;
|
|
AioContext *aio_context;
|
|
Error *local_err = NULL;
|
|
int job_flags = JOB_DEFAULT;
|
|
uint64_t top_perm, top_shared;
|
|
|
|
if (!has_speed) {
|
|
speed = 0;
|
|
}
|
|
if (!has_on_error) {
|
|
on_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
if (has_auto_finalize && !auto_finalize) {
|
|
job_flags |= JOB_MANUAL_FINALIZE;
|
|
}
|
|
if (has_auto_dismiss && !auto_dismiss) {
|
|
job_flags |= JOB_MANUAL_DISMISS;
|
|
}
|
|
|
|
/* Important Note:
|
|
* libvirt relies on the DeviceNotFound error class in order to probe for
|
|
* live commit feature versions; for this to work, we must make sure to
|
|
* perform the device lookup before any generic errors that may occur in a
|
|
* scenario in which all optional arguments are omitted. */
|
|
bs = qmp_get_root_bs(device, &local_err);
|
|
if (!bs) {
|
|
bs = bdrv_lookup_bs(device, device, NULL);
|
|
if (!bs) {
|
|
error_free(local_err);
|
|
error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
|
|
"Device '%s' not found", device);
|
|
} else {
|
|
error_propagate(errp, local_err);
|
|
}
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
|
|
goto out;
|
|
}
|
|
|
|
/* default top_bs is the active layer */
|
|
top_bs = bs;
|
|
|
|
if (top_node && top) {
|
|
error_setg(errp, "'top-node' and 'top' are mutually exclusive");
|
|
goto out;
|
|
} else if (top_node) {
|
|
top_bs = bdrv_lookup_bs(NULL, top_node, errp);
|
|
if (top_bs == NULL) {
|
|
goto out;
|
|
}
|
|
if (!bdrv_chain_contains(bs, top_bs)) {
|
|
error_setg(errp, "'%s' is not in this backing file chain",
|
|
top_node);
|
|
goto out;
|
|
}
|
|
} else if (top) {
|
|
/* This strcmp() is just a shortcut, there is no need to
|
|
* refresh @bs's filename. If it mismatches,
|
|
* bdrv_find_backing_image() will do the refresh and may still
|
|
* return @bs. */
|
|
if (strcmp(bs->filename, top) != 0) {
|
|
top_bs = bdrv_find_backing_image(bs, top);
|
|
}
|
|
}
|
|
|
|
if (top_bs == NULL) {
|
|
error_setg(errp, "Top image file %s not found", top ? top : "NULL");
|
|
goto out;
|
|
}
|
|
|
|
assert(bdrv_get_aio_context(top_bs) == aio_context);
|
|
|
|
if (base_node && base) {
|
|
error_setg(errp, "'base-node' and 'base' are mutually exclusive");
|
|
goto out;
|
|
} else if (base_node) {
|
|
base_bs = bdrv_lookup_bs(NULL, base_node, errp);
|
|
if (base_bs == NULL) {
|
|
goto out;
|
|
}
|
|
if (!bdrv_chain_contains(top_bs, base_bs)) {
|
|
error_setg(errp, "'%s' is not in this backing file chain",
|
|
base_node);
|
|
goto out;
|
|
}
|
|
} else if (base) {
|
|
base_bs = bdrv_find_backing_image(top_bs, base);
|
|
if (base_bs == NULL) {
|
|
error_setg(errp, "Can't find '%s' in the backing chain", base);
|
|
goto out;
|
|
}
|
|
} else {
|
|
base_bs = bdrv_find_base(top_bs);
|
|
if (base_bs == NULL) {
|
|
error_setg(errp, "There is no backimg image");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
assert(bdrv_get_aio_context(base_bs) == aio_context);
|
|
|
|
for (iter = top_bs; iter != bdrv_filter_or_cow_bs(base_bs);
|
|
iter = bdrv_filter_or_cow_bs(iter))
|
|
{
|
|
if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Do not allow attempts to commit an image into itself */
|
|
if (top_bs == base_bs) {
|
|
error_setg(errp, "cannot commit an image into itself");
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Active commit is required if and only if someone has taken a
|
|
* WRITE permission on the top node. Historically, we have always
|
|
* used active commit for top nodes, so continue that practice
|
|
* lest we possibly break clients that rely on this behavior, e.g.
|
|
* to later attach this node to a writing parent.
|
|
* (Active commit is never really wrong.)
|
|
*/
|
|
bdrv_get_cumulative_perm(top_bs, &top_perm, &top_shared);
|
|
if (top_perm & BLK_PERM_WRITE ||
|
|
bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs))
|
|
{
|
|
if (backing_file) {
|
|
if (bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) {
|
|
error_setg(errp, "'backing-file' specified,"
|
|
" but 'top' is the active layer");
|
|
} else {
|
|
error_setg(errp, "'backing-file' specified, but 'top' has a "
|
|
"writer on it");
|
|
}
|
|
goto out;
|
|
}
|
|
if (!job_id) {
|
|
/*
|
|
* Emulate here what block_job_create() does, because it
|
|
* is possible that @bs != @top_bs (the block job should
|
|
* be named after @bs, even if @top_bs is the actual
|
|
* source)
|
|
*/
|
|
job_id = bdrv_get_device_name(bs);
|
|
}
|
|
commit_active_start(job_id, top_bs, base_bs, job_flags, speed, on_error,
|
|
filter_node_name, NULL, NULL, false, &local_err);
|
|
} else {
|
|
BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
|
|
if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
|
|
goto out;
|
|
}
|
|
commit_start(job_id, bs, base_bs, top_bs, job_flags,
|
|
speed, on_error, backing_file,
|
|
filter_node_name, &local_err);
|
|
}
|
|
if (local_err != NULL) {
|
|
error_propagate(errp, local_err);
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
/* Common QMP interface for drive-backup and blockdev-backup */
|
|
static BlockJob *do_backup_common(BackupCommon *backup,
|
|
BlockDriverState *bs,
|
|
BlockDriverState *target_bs,
|
|
AioContext *aio_context,
|
|
JobTxn *txn, Error **errp)
|
|
{
|
|
BlockJob *job = NULL;
|
|
BdrvDirtyBitmap *bmap = NULL;
|
|
BackupPerf perf = { .max_workers = 64 };
|
|
int job_flags = JOB_DEFAULT;
|
|
|
|
if (!backup->has_speed) {
|
|
backup->speed = 0;
|
|
}
|
|
if (!backup->has_on_source_error) {
|
|
backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
if (!backup->has_on_target_error) {
|
|
backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
if (!backup->has_auto_finalize) {
|
|
backup->auto_finalize = true;
|
|
}
|
|
if (!backup->has_auto_dismiss) {
|
|
backup->auto_dismiss = true;
|
|
}
|
|
if (!backup->has_compress) {
|
|
backup->compress = false;
|
|
}
|
|
|
|
if (backup->x_perf) {
|
|
if (backup->x_perf->has_use_copy_range) {
|
|
perf.use_copy_range = backup->x_perf->use_copy_range;
|
|
}
|
|
if (backup->x_perf->has_max_workers) {
|
|
perf.max_workers = backup->x_perf->max_workers;
|
|
}
|
|
if (backup->x_perf->has_max_chunk) {
|
|
perf.max_chunk = backup->x_perf->max_chunk;
|
|
}
|
|
}
|
|
|
|
if ((backup->sync == MIRROR_SYNC_MODE_BITMAP) ||
|
|
(backup->sync == MIRROR_SYNC_MODE_INCREMENTAL)) {
|
|
/* done before desugaring 'incremental' to print the right message */
|
|
if (!backup->bitmap) {
|
|
error_setg(errp, "must provide a valid bitmap name for "
|
|
"'%s' sync mode", MirrorSyncMode_str(backup->sync));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL) {
|
|
if (backup->has_bitmap_mode &&
|
|
backup->bitmap_mode != BITMAP_SYNC_MODE_ON_SUCCESS) {
|
|
error_setg(errp, "Bitmap sync mode must be '%s' "
|
|
"when using sync mode '%s'",
|
|
BitmapSyncMode_str(BITMAP_SYNC_MODE_ON_SUCCESS),
|
|
MirrorSyncMode_str(backup->sync));
|
|
return NULL;
|
|
}
|
|
backup->has_bitmap_mode = true;
|
|
backup->sync = MIRROR_SYNC_MODE_BITMAP;
|
|
backup->bitmap_mode = BITMAP_SYNC_MODE_ON_SUCCESS;
|
|
}
|
|
|
|
if (backup->bitmap) {
|
|
bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
|
|
if (!bmap) {
|
|
error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
|
|
return NULL;
|
|
}
|
|
if (!backup->has_bitmap_mode) {
|
|
error_setg(errp, "Bitmap sync mode must be given "
|
|
"when providing a bitmap");
|
|
return NULL;
|
|
}
|
|
if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) {
|
|
return NULL;
|
|
}
|
|
|
|
/* This does not produce a useful bitmap artifact: */
|
|
if (backup->sync == MIRROR_SYNC_MODE_NONE) {
|
|
error_setg(errp, "sync mode '%s' does not produce meaningful bitmap"
|
|
" outputs", MirrorSyncMode_str(backup->sync));
|
|
return NULL;
|
|
}
|
|
|
|
/* If the bitmap isn't used for input or output, this is useless: */
|
|
if (backup->bitmap_mode == BITMAP_SYNC_MODE_NEVER &&
|
|
backup->sync != MIRROR_SYNC_MODE_BITMAP) {
|
|
error_setg(errp, "Bitmap sync mode '%s' has no meaningful effect"
|
|
" when combined with sync mode '%s'",
|
|
BitmapSyncMode_str(backup->bitmap_mode),
|
|
MirrorSyncMode_str(backup->sync));
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (!backup->bitmap && backup->has_bitmap_mode) {
|
|
error_setg(errp, "Cannot specify bitmap sync mode without a bitmap");
|
|
return NULL;
|
|
}
|
|
|
|
if (!backup->auto_finalize) {
|
|
job_flags |= JOB_MANUAL_FINALIZE;
|
|
}
|
|
if (!backup->auto_dismiss) {
|
|
job_flags |= JOB_MANUAL_DISMISS;
|
|
}
|
|
|
|
job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
|
|
backup->sync, bmap, backup->bitmap_mode,
|
|
backup->compress,
|
|
backup->filter_node_name,
|
|
&perf,
|
|
backup->on_source_error,
|
|
backup->on_target_error,
|
|
job_flags, NULL, NULL, txn, errp);
|
|
return job;
|
|
}
|
|
|
|
void qmp_drive_backup(DriveBackup *backup, Error **errp)
|
|
{
|
|
TransactionAction action = {
|
|
.type = TRANSACTION_ACTION_KIND_DRIVE_BACKUP,
|
|
.u.drive_backup.data = backup,
|
|
};
|
|
blockdev_do_action(&action, errp);
|
|
}
|
|
|
|
BlockDeviceInfoList *qmp_query_named_block_nodes(bool has_flat,
|
|
bool flat,
|
|
Error **errp)
|
|
{
|
|
bool return_flat = has_flat && flat;
|
|
|
|
return bdrv_named_nodes_list(return_flat, errp);
|
|
}
|
|
|
|
XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp)
|
|
{
|
|
return bdrv_get_xdbg_block_graph(errp);
|
|
}
|
|
|
|
void qmp_blockdev_backup(BlockdevBackup *backup, Error **errp)
|
|
{
|
|
TransactionAction action = {
|
|
.type = TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP,
|
|
.u.blockdev_backup.data = backup,
|
|
};
|
|
blockdev_do_action(&action, errp);
|
|
}
|
|
|
|
/* Parameter check and block job starting for drive mirroring.
|
|
* Caller should hold @device and @target's aio context (must be the same).
|
|
**/
|
|
static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
|
|
BlockDriverState *target,
|
|
const char *replaces,
|
|
enum MirrorSyncMode sync,
|
|
BlockMirrorBackingMode backing_mode,
|
|
bool zero_target,
|
|
bool has_speed, int64_t speed,
|
|
bool has_granularity, uint32_t granularity,
|
|
bool has_buf_size, int64_t buf_size,
|
|
bool has_on_source_error,
|
|
BlockdevOnError on_source_error,
|
|
bool has_on_target_error,
|
|
BlockdevOnError on_target_error,
|
|
bool has_unmap, bool unmap,
|
|
const char *filter_node_name,
|
|
bool has_copy_mode, MirrorCopyMode copy_mode,
|
|
bool has_auto_finalize, bool auto_finalize,
|
|
bool has_auto_dismiss, bool auto_dismiss,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *unfiltered_bs;
|
|
int job_flags = JOB_DEFAULT;
|
|
|
|
GLOBAL_STATE_CODE();
|
|
GRAPH_RDLOCK_GUARD_MAINLOOP();
|
|
|
|
if (!has_speed) {
|
|
speed = 0;
|
|
}
|
|
if (!has_on_source_error) {
|
|
on_source_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
if (!has_on_target_error) {
|
|
on_target_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
if (!has_granularity) {
|
|
granularity = 0;
|
|
}
|
|
if (!has_buf_size) {
|
|
buf_size = 0;
|
|
}
|
|
if (!has_unmap) {
|
|
unmap = true;
|
|
}
|
|
if (!has_copy_mode) {
|
|
copy_mode = MIRROR_COPY_MODE_BACKGROUND;
|
|
}
|
|
if (has_auto_finalize && !auto_finalize) {
|
|
job_flags |= JOB_MANUAL_FINALIZE;
|
|
}
|
|
if (has_auto_dismiss && !auto_dismiss) {
|
|
job_flags |= JOB_MANUAL_DISMISS;
|
|
}
|
|
|
|
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
|
|
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
|
|
"a value in range [512B, 64MB]");
|
|
return;
|
|
}
|
|
if (granularity & (granularity - 1)) {
|
|
error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
|
|
"a power of 2");
|
|
return;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
|
|
return;
|
|
}
|
|
if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_backing_chain_next(bs) && sync == MIRROR_SYNC_MODE_TOP) {
|
|
sync = MIRROR_SYNC_MODE_FULL;
|
|
}
|
|
|
|
if (!replaces) {
|
|
/* We want to mirror from @bs, but keep implicit filters on top */
|
|
unfiltered_bs = bdrv_skip_implicit_filters(bs);
|
|
if (unfiltered_bs != bs) {
|
|
replaces = unfiltered_bs->node_name;
|
|
}
|
|
}
|
|
|
|
if (replaces) {
|
|
BlockDriverState *to_replace_bs;
|
|
AioContext *replace_aio_context;
|
|
int64_t bs_size, replace_size;
|
|
|
|
bs_size = bdrv_getlength(bs);
|
|
if (bs_size < 0) {
|
|
error_setg_errno(errp, -bs_size, "Failed to query device's size");
|
|
return;
|
|
}
|
|
|
|
to_replace_bs = check_to_replace_node(bs, replaces, errp);
|
|
if (!to_replace_bs) {
|
|
return;
|
|
}
|
|
|
|
replace_aio_context = bdrv_get_aio_context(to_replace_bs);
|
|
aio_context_acquire(replace_aio_context);
|
|
replace_size = bdrv_getlength(to_replace_bs);
|
|
aio_context_release(replace_aio_context);
|
|
|
|
if (replace_size < 0) {
|
|
error_setg_errno(errp, -replace_size,
|
|
"Failed to query the replacement node's size");
|
|
return;
|
|
}
|
|
if (bs_size != replace_size) {
|
|
error_setg(errp, "cannot replace image with a mirror image of "
|
|
"different size");
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* pass the node name to replace to mirror start since it's loose coupling
|
|
* and will allow to check whether the node still exist at mirror completion
|
|
*/
|
|
mirror_start(job_id, bs, target,
|
|
replaces, job_flags,
|
|
speed, granularity, buf_size, sync, backing_mode, zero_target,
|
|
on_source_error, on_target_error, unmap, filter_node_name,
|
|
copy_mode, errp);
|
|
}
|
|
|
|
void qmp_drive_mirror(DriveMirror *arg, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *target_backing_bs, *target_bs;
|
|
AioContext *aio_context;
|
|
AioContext *old_context;
|
|
BlockMirrorBackingMode backing_mode;
|
|
Error *local_err = NULL;
|
|
QDict *options = NULL;
|
|
int flags;
|
|
int64_t size;
|
|
const char *format = arg->format;
|
|
bool zero_target;
|
|
int ret;
|
|
|
|
bs = qmp_get_root_bs(arg->device, errp);
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
/* Early check to avoid creating target */
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (!arg->has_mode) {
|
|
arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
}
|
|
|
|
if (!arg->format) {
|
|
format = (arg->mode == NEW_IMAGE_MODE_EXISTING
|
|
? NULL : bs->drv->format_name);
|
|
}
|
|
|
|
flags = bs->open_flags | BDRV_O_RDWR;
|
|
target_backing_bs = bdrv_cow_bs(bdrv_skip_filters(bs));
|
|
if (!target_backing_bs && arg->sync == MIRROR_SYNC_MODE_TOP) {
|
|
arg->sync = MIRROR_SYNC_MODE_FULL;
|
|
}
|
|
if (arg->sync == MIRROR_SYNC_MODE_NONE) {
|
|
target_backing_bs = bs;
|
|
}
|
|
|
|
size = bdrv_getlength(bs);
|
|
if (size < 0) {
|
|
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
|
goto out;
|
|
}
|
|
|
|
if (arg->replaces) {
|
|
if (!arg->node_name) {
|
|
error_setg(errp, "a node-name must be provided when replacing a"
|
|
" named node of the graph");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
|
|
backing_mode = MIRROR_SOURCE_BACKING_CHAIN;
|
|
} else {
|
|
backing_mode = MIRROR_OPEN_BACKING_CHAIN;
|
|
}
|
|
|
|
/* Don't open backing image in create() */
|
|
flags |= BDRV_O_NO_BACKING;
|
|
|
|
if ((arg->sync == MIRROR_SYNC_MODE_FULL || !target_backing_bs)
|
|
&& arg->mode != NEW_IMAGE_MODE_EXISTING)
|
|
{
|
|
/* create new image w/o backing file */
|
|
assert(format);
|
|
bdrv_img_create(arg->target, format,
|
|
NULL, NULL, NULL, size, flags, false, &local_err);
|
|
} else {
|
|
/* Implicit filters should not appear in the filename */
|
|
BlockDriverState *explicit_backing =
|
|
bdrv_skip_implicit_filters(target_backing_bs);
|
|
|
|
switch (arg->mode) {
|
|
case NEW_IMAGE_MODE_EXISTING:
|
|
break;
|
|
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
|
/* create new image with backing file */
|
|
bdrv_refresh_filename(explicit_backing);
|
|
bdrv_img_create(arg->target, format,
|
|
explicit_backing->filename,
|
|
explicit_backing->drv->format_name,
|
|
NULL, size, flags, false, &local_err);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out;
|
|
}
|
|
|
|
options = qdict_new();
|
|
if (arg->node_name) {
|
|
qdict_put_str(options, "node-name", arg->node_name);
|
|
}
|
|
if (format) {
|
|
qdict_put_str(options, "driver", format);
|
|
}
|
|
aio_context_release(aio_context);
|
|
|
|
/* Mirroring takes care of copy-on-write using the source's backing
|
|
* file.
|
|
*/
|
|
aio_context_acquire(qemu_get_aio_context());
|
|
target_bs = bdrv_open(arg->target, NULL, options, flags, errp);
|
|
aio_context_release(qemu_get_aio_context());
|
|
|
|
if (!target_bs) {
|
|
return;
|
|
}
|
|
|
|
zero_target = (arg->sync == MIRROR_SYNC_MODE_FULL &&
|
|
(arg->mode == NEW_IMAGE_MODE_EXISTING ||
|
|
!bdrv_has_zero_init(target_bs)));
|
|
|
|
|
|
/* Honor bdrv_try_change_aio_context() context acquisition requirements. */
|
|
old_context = bdrv_get_aio_context(target_bs);
|
|
aio_context_acquire(old_context);
|
|
|
|
ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
|
|
if (ret < 0) {
|
|
bdrv_unref(target_bs);
|
|
aio_context_release(old_context);
|
|
return;
|
|
}
|
|
|
|
aio_context_release(old_context);
|
|
aio_context_acquire(aio_context);
|
|
|
|
blockdev_mirror_common(arg->job_id, bs, target_bs,
|
|
arg->replaces, arg->sync,
|
|
backing_mode, zero_target,
|
|
arg->has_speed, arg->speed,
|
|
arg->has_granularity, arg->granularity,
|
|
arg->has_buf_size, arg->buf_size,
|
|
arg->has_on_source_error, arg->on_source_error,
|
|
arg->has_on_target_error, arg->on_target_error,
|
|
arg->has_unmap, arg->unmap,
|
|
NULL,
|
|
arg->has_copy_mode, arg->copy_mode,
|
|
arg->has_auto_finalize, arg->auto_finalize,
|
|
arg->has_auto_dismiss, arg->auto_dismiss,
|
|
errp);
|
|
bdrv_unref(target_bs);
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
void qmp_blockdev_mirror(const char *job_id,
|
|
const char *device, const char *target,
|
|
const char *replaces,
|
|
MirrorSyncMode sync,
|
|
bool has_speed, int64_t speed,
|
|
bool has_granularity, uint32_t granularity,
|
|
bool has_buf_size, int64_t buf_size,
|
|
bool has_on_source_error,
|
|
BlockdevOnError on_source_error,
|
|
bool has_on_target_error,
|
|
BlockdevOnError on_target_error,
|
|
const char *filter_node_name,
|
|
bool has_copy_mode, MirrorCopyMode copy_mode,
|
|
bool has_auto_finalize, bool auto_finalize,
|
|
bool has_auto_dismiss, bool auto_dismiss,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *target_bs;
|
|
AioContext *aio_context;
|
|
AioContext *old_context;
|
|
BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN;
|
|
bool zero_target;
|
|
int ret;
|
|
|
|
bs = qmp_get_root_bs(device, errp);
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
target_bs = bdrv_lookup_bs(target, target, errp);
|
|
if (!target_bs) {
|
|
return;
|
|
}
|
|
|
|
zero_target = (sync == MIRROR_SYNC_MODE_FULL);
|
|
|
|
/* Honor bdrv_try_change_aio_context() context acquisition requirements. */
|
|
old_context = bdrv_get_aio_context(target_bs);
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(old_context);
|
|
|
|
ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp);
|
|
|
|
aio_context_release(old_context);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (ret < 0) {
|
|
goto out;
|
|
}
|
|
|
|
blockdev_mirror_common(job_id, bs, target_bs,
|
|
replaces, sync, backing_mode,
|
|
zero_target, has_speed, speed,
|
|
has_granularity, granularity,
|
|
has_buf_size, buf_size,
|
|
has_on_source_error, on_source_error,
|
|
has_on_target_error, on_target_error,
|
|
true, true, filter_node_name,
|
|
has_copy_mode, copy_mode,
|
|
has_auto_finalize, auto_finalize,
|
|
has_auto_dismiss, auto_dismiss,
|
|
errp);
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
/*
|
|
* Get a block job using its ID. Called with job_mutex held.
|
|
*/
|
|
static BlockJob *find_block_job_locked(const char *id, Error **errp)
|
|
{
|
|
BlockJob *job;
|
|
|
|
assert(id != NULL);
|
|
|
|
job = block_job_get_locked(id);
|
|
|
|
if (!job) {
|
|
error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
|
|
"Block job '%s' not found", id);
|
|
return NULL;
|
|
}
|
|
|
|
return job;
|
|
}
|
|
|
|
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
|
|
{
|
|
BlockJob *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
job = find_block_job_locked(device, errp);
|
|
|
|
if (!job) {
|
|
return;
|
|
}
|
|
|
|
block_job_set_speed_locked(job, speed, errp);
|
|
}
|
|
|
|
void qmp_block_job_cancel(const char *device,
|
|
bool has_force, bool force, Error **errp)
|
|
{
|
|
BlockJob *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
job = find_block_job_locked(device, errp);
|
|
|
|
if (!job) {
|
|
return;
|
|
}
|
|
|
|
if (!has_force) {
|
|
force = false;
|
|
}
|
|
|
|
if (job_user_paused_locked(&job->job) && !force) {
|
|
error_setg(errp, "The block job for device '%s' is currently paused",
|
|
device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_cancel(job);
|
|
job_user_cancel_locked(&job->job, force, errp);
|
|
}
|
|
|
|
void qmp_block_job_pause(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
job = find_block_job_locked(device, errp);
|
|
|
|
if (!job) {
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_pause(job);
|
|
job_user_pause_locked(&job->job, errp);
|
|
}
|
|
|
|
void qmp_block_job_resume(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
job = find_block_job_locked(device, errp);
|
|
|
|
if (!job) {
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_resume(job);
|
|
job_user_resume_locked(&job->job, errp);
|
|
}
|
|
|
|
void qmp_block_job_complete(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
job = find_block_job_locked(device, errp);
|
|
|
|
if (!job) {
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_complete(job);
|
|
job_complete_locked(&job->job, errp);
|
|
}
|
|
|
|
void qmp_block_job_finalize(const char *id, Error **errp)
|
|
{
|
|
BlockJob *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
job = find_block_job_locked(id, errp);
|
|
|
|
if (!job) {
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_finalize(job);
|
|
job_ref_locked(&job->job);
|
|
job_finalize_locked(&job->job, errp);
|
|
|
|
job_unref_locked(&job->job);
|
|
}
|
|
|
|
void qmp_block_job_dismiss(const char *id, Error **errp)
|
|
{
|
|
BlockJob *bjob;
|
|
Job *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
bjob = find_block_job_locked(id, errp);
|
|
|
|
if (!bjob) {
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_dismiss(bjob);
|
|
job = &bjob->job;
|
|
job_dismiss_locked(&job, errp);
|
|
}
|
|
|
|
void qmp_change_backing_file(const char *device,
|
|
const char *image_node_name,
|
|
const char *backing_file,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs = NULL;
|
|
AioContext *aio_context;
|
|
BlockDriverState *image_bs = NULL;
|
|
Error *local_err = NULL;
|
|
bool ro;
|
|
int ret;
|
|
|
|
bs = qmp_get_root_bs(device, errp);
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto out;
|
|
}
|
|
|
|
if (!image_bs) {
|
|
error_setg(errp, "image file not found");
|
|
goto out;
|
|
}
|
|
|
|
if (bdrv_find_base(image_bs) == image_bs) {
|
|
error_setg(errp, "not allowing backing file change on an image "
|
|
"without a backing file");
|
|
goto out;
|
|
}
|
|
|
|
/* even though we are not necessarily operating on bs, we need it to
|
|
* determine if block ops are currently prohibited on the chain */
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
|
|
goto out;
|
|
}
|
|
|
|
/* final sanity check */
|
|
if (!bdrv_chain_contains(bs, image_bs)) {
|
|
error_setg(errp, "'%s' and image file are not in the same chain",
|
|
device);
|
|
goto out;
|
|
}
|
|
|
|
/* if not r/w, reopen to make r/w */
|
|
ro = bdrv_is_read_only(image_bs);
|
|
|
|
if (ro) {
|
|
if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = bdrv_change_backing_file(image_bs, backing_file,
|
|
image_bs->drv ? image_bs->drv->format_name : "",
|
|
false);
|
|
|
|
if (ret < 0) {
|
|
error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
|
|
backing_file);
|
|
/* don't exit here, so we can try to restore open flags if
|
|
* appropriate */
|
|
}
|
|
|
|
if (ro) {
|
|
bdrv_reopen_set_read_only(image_bs, true, errp);
|
|
}
|
|
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
QObject *obj;
|
|
Visitor *v = qobject_output_visitor_new(&obj);
|
|
QDict *qdict;
|
|
|
|
visit_type_BlockdevOptions(v, NULL, &options, &error_abort);
|
|
visit_complete(v, &obj);
|
|
qdict = qobject_to(QDict, obj);
|
|
|
|
qdict_flatten(qdict);
|
|
|
|
if (!qdict_get_try_str(qdict, "node-name")) {
|
|
error_setg(errp, "'node-name' must be specified for the root node");
|
|
goto fail;
|
|
}
|
|
|
|
bs = bds_tree_init(qdict, errp);
|
|
if (!bs) {
|
|
goto fail;
|
|
}
|
|
|
|
bdrv_set_monitor_owned(bs);
|
|
|
|
fail:
|
|
visit_free(v);
|
|
}
|
|
|
|
void qmp_blockdev_reopen(BlockdevOptionsList *reopen_list, Error **errp)
|
|
{
|
|
BlockReopenQueue *queue = NULL;
|
|
|
|
/* Add each one of the BDS that we want to reopen to the queue */
|
|
for (; reopen_list != NULL; reopen_list = reopen_list->next) {
|
|
BlockdevOptions *options = reopen_list->value;
|
|
BlockDriverState *bs;
|
|
AioContext *ctx;
|
|
QObject *obj;
|
|
Visitor *v;
|
|
QDict *qdict;
|
|
|
|
/* Check for the selected node name */
|
|
if (!options->node_name) {
|
|
error_setg(errp, "node-name not specified");
|
|
goto fail;
|
|
}
|
|
|
|
bs = bdrv_find_node(options->node_name);
|
|
if (!bs) {
|
|
error_setg(errp, "Failed to find node with node-name='%s'",
|
|
options->node_name);
|
|
goto fail;
|
|
}
|
|
|
|
/* Put all options in a QDict and flatten it */
|
|
v = qobject_output_visitor_new(&obj);
|
|
visit_type_BlockdevOptions(v, NULL, &options, &error_abort);
|
|
visit_complete(v, &obj);
|
|
visit_free(v);
|
|
|
|
qdict = qobject_to(QDict, obj);
|
|
|
|
qdict_flatten(qdict);
|
|
|
|
ctx = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(ctx);
|
|
|
|
queue = bdrv_reopen_queue(queue, bs, qdict, false);
|
|
|
|
aio_context_release(ctx);
|
|
}
|
|
|
|
/* Perform the reopen operation */
|
|
bdrv_reopen_multiple(queue, errp);
|
|
queue = NULL;
|
|
|
|
fail:
|
|
bdrv_reopen_queue_free(queue);
|
|
}
|
|
|
|
void qmp_blockdev_del(const char *node_name, Error **errp)
|
|
{
|
|
AioContext *aio_context;
|
|
BlockDriverState *bs;
|
|
|
|
GLOBAL_STATE_CODE();
|
|
|
|
bs = bdrv_find_node(node_name);
|
|
if (!bs) {
|
|
error_setg(errp, "Failed to find node with node-name='%s'", node_name);
|
|
return;
|
|
}
|
|
if (bdrv_has_blk(bs)) {
|
|
error_setg(errp, "Node %s is in use", node_name);
|
|
return;
|
|
}
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
|
|
goto out;
|
|
}
|
|
|
|
if (!QTAILQ_IN_USE(bs, monitor_list)) {
|
|
error_setg(errp, "Node %s is not owned by the monitor",
|
|
bs->node_name);
|
|
goto out;
|
|
}
|
|
|
|
if (bs->refcnt > 1) {
|
|
error_setg(errp, "Block device %s is in use",
|
|
bdrv_get_device_or_node_name(bs));
|
|
goto out;
|
|
}
|
|
|
|
QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
|
|
bdrv_unref(bs);
|
|
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs,
|
|
const char *child_name)
|
|
{
|
|
BdrvChild *child;
|
|
|
|
QLIST_FOREACH(child, &parent_bs->children, next) {
|
|
if (strcmp(child->name, child_name) == 0) {
|
|
return child;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void qmp_x_blockdev_change(const char *parent, const char *child,
|
|
const char *node, Error **errp)
|
|
{
|
|
BlockDriverState *parent_bs, *new_bs = NULL;
|
|
BdrvChild *p_child;
|
|
|
|
parent_bs = bdrv_lookup_bs(parent, parent, errp);
|
|
if (!parent_bs) {
|
|
return;
|
|
}
|
|
|
|
if (!child == !node) {
|
|
if (child) {
|
|
error_setg(errp, "The parameters child and node are in conflict");
|
|
} else {
|
|
error_setg(errp, "Either child or node must be specified");
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (child) {
|
|
p_child = bdrv_find_child(parent_bs, child);
|
|
if (!p_child) {
|
|
error_setg(errp, "Node '%s' does not have child '%s'",
|
|
parent, child);
|
|
return;
|
|
}
|
|
bdrv_del_child(parent_bs, p_child, errp);
|
|
}
|
|
|
|
if (node) {
|
|
new_bs = bdrv_find_node(node);
|
|
if (!new_bs) {
|
|
error_setg(errp, "Node '%s' not found", node);
|
|
return;
|
|
}
|
|
bdrv_add_child(parent_bs, new_bs, errp);
|
|
}
|
|
}
|
|
|
|
BlockJobInfoList *qmp_query_block_jobs(Error **errp)
|
|
{
|
|
BlockJobInfoList *head = NULL, **tail = &head;
|
|
BlockJob *job;
|
|
|
|
JOB_LOCK_GUARD();
|
|
|
|
for (job = block_job_next_locked(NULL); job;
|
|
job = block_job_next_locked(job)) {
|
|
BlockJobInfo *value;
|
|
|
|
if (block_job_is_internal(job)) {
|
|
continue;
|
|
}
|
|
value = block_job_query_locked(job, errp);
|
|
if (!value) {
|
|
qapi_free_BlockJobInfoList(head);
|
|
return NULL;
|
|
}
|
|
QAPI_LIST_APPEND(tail, value);
|
|
}
|
|
|
|
return head;
|
|
}
|
|
|
|
void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread,
|
|
bool has_force, bool force, Error **errp)
|
|
{
|
|
AioContext *old_context;
|
|
AioContext *new_context;
|
|
BlockDriverState *bs;
|
|
|
|
bs = bdrv_find_node(node_name);
|
|
if (!bs) {
|
|
error_setg(errp, "Failed to find node with node-name='%s'", node_name);
|
|
return;
|
|
}
|
|
|
|
/* Protects against accidents. */
|
|
if (!(has_force && force) && bdrv_has_blk(bs)) {
|
|
error_setg(errp, "Node %s is associated with a BlockBackend and could "
|
|
"be in use (use force=true to override this check)",
|
|
node_name);
|
|
return;
|
|
}
|
|
|
|
if (iothread->type == QTYPE_QSTRING) {
|
|
IOThread *obj = iothread_by_id(iothread->u.s);
|
|
if (!obj) {
|
|
error_setg(errp, "Cannot find iothread %s", iothread->u.s);
|
|
return;
|
|
}
|
|
|
|
new_context = iothread_get_aio_context(obj);
|
|
} else {
|
|
new_context = qemu_get_aio_context();
|
|
}
|
|
|
|
old_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(old_context);
|
|
|
|
bdrv_try_change_aio_context(bs, new_context, NULL, errp);
|
|
|
|
aio_context_release(old_context);
|
|
}
|
|
|
|
QemuOptsList qemu_common_drive_opts = {
|
|
.name = "drive",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = "snapshot",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "enable/disable snapshot mode",
|
|
},{
|
|
.name = "aio",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "host AIO implementation (threads, native, io_uring)",
|
|
},{
|
|
.name = BDRV_OPT_CACHE_WB,
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "Enable writeback mode",
|
|
},{
|
|
.name = "format",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk format (raw, qcow2, ...)",
|
|
},{
|
|
.name = "rerror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "read error action",
|
|
},{
|
|
.name = "werror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "write error action",
|
|
},{
|
|
.name = BDRV_OPT_READ_ONLY,
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "open drive file as read-only",
|
|
},
|
|
|
|
THROTTLE_OPTS,
|
|
|
|
{
|
|
.name = "throttling.group",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "name of the block throttling group",
|
|
},{
|
|
.name = "copy-on-read",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "copy read data from backing file into image file",
|
|
},{
|
|
.name = "detect-zeroes",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "try to optimize zero writes (off, on, unmap)",
|
|
},{
|
|
.name = "stats-account-invalid",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "whether to account for invalid I/O operations "
|
|
"in the statistics",
|
|
},{
|
|
.name = "stats-account-failed",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "whether to account for failed I/O operations "
|
|
"in the statistics",
|
|
},
|
|
{ /* end of list */ }
|
|
},
|
|
};
|
|
|
|
QemuOptsList qemu_drive_opts = {
|
|
.name = "drive",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
|
|
.desc = {
|
|
/*
|
|
* no elements => accept any params
|
|
* validation will happen later
|
|
*/
|
|
{ /* end of list */ }
|
|
},
|
|
};
|