mirror of https://gitee.com/openkylin/qemu.git
2677 lines
77 KiB
C
2677 lines
77 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 "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 "monitor/monitor.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "qapi/qmp/types.h"
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#include "qapi-visit.h"
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#include "qapi/qmp-output-visitor.h"
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#include "sysemu/sysemu.h"
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#include "block/block_int.h"
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#include "qmp-commands.h"
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#include "trace.h"
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#include "sysemu/arch_init.h"
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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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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 const 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 imlement 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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* 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(BlockDriverState *bs)
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{
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DriveInfo *dinfo = drive_get_by_blockdev(bs);
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if (dinfo && !dinfo->enable_auto_del) {
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return;
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}
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if (bs->job) {
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block_job_cancel(bs->job);
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}
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if (dinfo) {
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dinfo->auto_del = 1;
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}
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}
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void blockdev_auto_del(BlockDriverState *bs)
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{
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DriveInfo *dinfo = drive_get_by_blockdev(bs);
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if (dinfo && dinfo->auto_del) {
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drive_del(dinfo);
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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_def(const char *optstr)
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{
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return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
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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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char buf[32];
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opts = drive_def(optstr);
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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]);
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}
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if (index >= 0) {
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snprintf(buf, sizeof(buf), "%d", index);
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qemu_opt_set(opts, "index", buf);
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}
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if (file)
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qemu_opt_set(opts, "file", file);
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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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DriveInfo *dinfo;
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/* seek interface, bus and unit */
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (dinfo->type == type &&
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dinfo->bus == bus &&
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dinfo->unit == unit)
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return dinfo;
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}
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return NULL;
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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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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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DriveInfo *dinfo;
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max_bus = -1;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if(dinfo->type == type &&
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dinfo->bus > max_bus)
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max_bus = dinfo->bus;
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}
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return max_bus;
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}
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/* Get a block device. This should only be used for single-drive devices
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(e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
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appropriate bus. */
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DriveInfo *drive_get_next(BlockInterfaceType type)
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{
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static int next_block_unit[IF_COUNT];
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return drive_get(type, 0, next_block_unit[type]++);
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}
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DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
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{
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DriveInfo *dinfo;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (dinfo->bdrv == bs) {
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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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static void bdrv_format_print(void *opaque, const char *name)
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{
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error_printf(" %s", name);
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}
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void drive_del(DriveInfo *dinfo)
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{
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if (dinfo->opts) {
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qemu_opts_del(dinfo->opts);
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}
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bdrv_unref(dinfo->bdrv);
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g_free(dinfo->id);
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QTAILQ_REMOVE(&drives, dinfo, next);
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g_free(dinfo->serial);
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g_free(dinfo);
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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 void bdrv_put_ref_bh(void *opaque)
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{
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BDRVPutRefBH *s = opaque;
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bdrv_unref(s->bs);
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qemu_bh_delete(s->bh);
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g_free(s);
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}
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/*
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* Release a BDS reference in a BH
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*
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* It is not safe to use bdrv_unref() from a callback function when the callers
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* still need the BlockDriverState. In such cases we schedule a BH to release
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* the reference.
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*/
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static void bdrv_put_ref_bh_schedule(BlockDriverState *bs)
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{
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BDRVPutRefBH *s;
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s = g_new(BDRVPutRefBH, 1);
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s->bh = qemu_bh_new(bdrv_put_ref_bh, s);
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s->bs = bs;
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qemu_bh_schedule(s->bh);
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}
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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 inline int parse_enum_option(const char *lookup[], const char *buf,
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int max, int def, Error **errp)
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{
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int i;
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if (!buf) {
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return def;
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}
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for (i = 0; i < max; i++) {
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if (!strcmp(buf, lookup[i])) {
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return i;
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}
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}
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error_setg(errp, "invalid parameter value: %s", buf);
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return def;
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}
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static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
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{
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if (throttle_conflicting(cfg)) {
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error_setg(errp, "bps/iops/max total values and read/write values"
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" cannot be used at the same time");
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return false;
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}
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if (!throttle_is_valid(cfg)) {
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error_setg(errp, "bps/iops/maxs values must be 0 or greater");
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return false;
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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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/* Takes the ownership of bs_opts */
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static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
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Error **errp)
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{
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const char *buf;
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int ro = 0;
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int bdrv_flags = 0;
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int on_read_error, on_write_error;
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DriveInfo *dinfo;
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ThrottleConfig cfg;
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int snapshot = 0;
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bool copy_on_read;
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int ret;
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Error *error = NULL;
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QemuOpts *opts;
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const char *id;
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bool has_driver_specific_opts;
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BlockdevDetectZeroesOptions detect_zeroes;
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BlockDriver *drv = NULL;
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/* Check common options by copying from bs_opts to opts, all other options
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* stay in bs_opts for processing by bdrv_open(). */
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id = qdict_get_try_str(bs_opts, "id");
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opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
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if (error) {
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error_propagate(errp, error);
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goto err_no_opts;
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}
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qemu_opts_absorb_qdict(opts, bs_opts, &error);
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if (error) {
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error_propagate(errp, error);
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goto early_err;
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}
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if (id) {
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qdict_del(bs_opts, "id");
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}
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has_driver_specific_opts = !!qdict_size(bs_opts);
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/* extract parameters */
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snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
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ro = qemu_opt_get_bool(opts, "read-only", 0);
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copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
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if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
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if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
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error_setg(errp, "invalid discard option");
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goto early_err;
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}
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}
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if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
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bdrv_flags |= BDRV_O_CACHE_WB;
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}
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if (qemu_opt_get_bool(opts, "cache.direct", false)) {
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bdrv_flags |= BDRV_O_NOCACHE;
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}
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if (qemu_opt_get_bool(opts, "cache.no-flush", false)) {
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bdrv_flags |= BDRV_O_NO_FLUSH;
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}
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#ifdef CONFIG_LINUX_AIO
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if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
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if (!strcmp(buf, "native")) {
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bdrv_flags |= BDRV_O_NATIVE_AIO;
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} else if (!strcmp(buf, "threads")) {
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/* this is the default */
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} else {
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error_setg(errp, "invalid aio option");
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goto early_err;
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}
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}
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#endif
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if ((buf = qemu_opt_get(opts, "format")) != NULL) {
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if (is_help_option(buf)) {
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error_printf("Supported formats:");
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bdrv_iterate_format(bdrv_format_print, NULL);
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error_printf("\n");
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goto early_err;
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}
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drv = bdrv_find_format(buf);
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if (!drv) {
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error_setg(errp, "'%s' invalid format", buf);
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goto early_err;
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}
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}
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|
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/* disk I/O throttling */
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memset(&cfg, 0, sizeof(cfg));
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cfg.buckets[THROTTLE_BPS_TOTAL].avg =
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qemu_opt_get_number(opts, "throttling.bps-total", 0);
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cfg.buckets[THROTTLE_BPS_READ].avg =
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qemu_opt_get_number(opts, "throttling.bps-read", 0);
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cfg.buckets[THROTTLE_BPS_WRITE].avg =
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qemu_opt_get_number(opts, "throttling.bps-write", 0);
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cfg.buckets[THROTTLE_OPS_TOTAL].avg =
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qemu_opt_get_number(opts, "throttling.iops-total", 0);
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cfg.buckets[THROTTLE_OPS_READ].avg =
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qemu_opt_get_number(opts, "throttling.iops-read", 0);
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cfg.buckets[THROTTLE_OPS_WRITE].avg =
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qemu_opt_get_number(opts, "throttling.iops-write", 0);
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|
|
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cfg.buckets[THROTTLE_BPS_TOTAL].max =
|
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qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
|
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cfg.buckets[THROTTLE_BPS_READ].max =
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qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
|
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cfg.buckets[THROTTLE_BPS_WRITE].max =
|
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qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
|
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cfg.buckets[THROTTLE_OPS_TOTAL].max =
|
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qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
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cfg.buckets[THROTTLE_OPS_READ].max =
|
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qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
|
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cfg.buckets[THROTTLE_OPS_WRITE].max =
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qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
|
|
|
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cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0);
|
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|
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if (!check_throttle_config(&cfg, &error)) {
|
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error_propagate(errp, error);
|
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goto early_err;
|
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}
|
|
|
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on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
|
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if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
|
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on_write_error = parse_block_error_action(buf, 0, &error);
|
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if (error) {
|
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error_propagate(errp, error);
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goto early_err;
|
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}
|
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}
|
|
|
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on_read_error = BLOCKDEV_ON_ERROR_REPORT;
|
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if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
|
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on_read_error = parse_block_error_action(buf, 1, &error);
|
|
if (error) {
|
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error_propagate(errp, error);
|
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goto early_err;
|
|
}
|
|
}
|
|
|
|
detect_zeroes =
|
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parse_enum_option(BlockdevDetectZeroesOptions_lookup,
|
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qemu_opt_get(opts, "detect-zeroes"),
|
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BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX,
|
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BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
|
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&error);
|
|
if (error) {
|
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error_propagate(errp, error);
|
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goto early_err;
|
|
}
|
|
|
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if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
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!(bdrv_flags & BDRV_O_UNMAP)) {
|
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error_setg(errp, "setting detect-zeroes to unmap is not allowed "
|
|
"without setting discard operation to unmap");
|
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goto early_err;
|
|
}
|
|
|
|
/* init */
|
|
dinfo = g_malloc0(sizeof(*dinfo));
|
|
dinfo->id = g_strdup(qemu_opts_id(opts));
|
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dinfo->bdrv = bdrv_new(dinfo->id, &error);
|
|
if (error) {
|
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error_propagate(errp, error);
|
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goto bdrv_new_err;
|
|
}
|
|
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
|
dinfo->bdrv->read_only = ro;
|
|
dinfo->bdrv->detect_zeroes = detect_zeroes;
|
|
QTAILQ_INSERT_TAIL(&drives, dinfo, next);
|
|
|
|
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
|
|
|
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/* disk I/O throttling */
|
|
if (throttle_enabled(&cfg)) {
|
|
bdrv_io_limits_enable(dinfo->bdrv);
|
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bdrv_set_io_limits(dinfo->bdrv, &cfg);
|
|
}
|
|
|
|
if (!file || !*file) {
|
|
if (has_driver_specific_opts) {
|
|
file = NULL;
|
|
} else {
|
|
QDECREF(bs_opts);
|
|
qemu_opts_del(opts);
|
|
return dinfo;
|
|
}
|
|
}
|
|
if (snapshot) {
|
|
/* always use cache=unsafe with snapshot */
|
|
bdrv_flags &= ~BDRV_O_CACHE_MASK;
|
|
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
|
|
}
|
|
|
|
if (copy_on_read) {
|
|
bdrv_flags |= BDRV_O_COPY_ON_READ;
|
|
}
|
|
|
|
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
|
bdrv_flags |= BDRV_O_INCOMING;
|
|
}
|
|
|
|
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
|
|
|
QINCREF(bs_opts);
|
|
ret = bdrv_open(&dinfo->bdrv, file, NULL, bs_opts, bdrv_flags, drv, &error);
|
|
|
|
if (ret < 0) {
|
|
error_setg(errp, "could not open disk image %s: %s",
|
|
file ?: dinfo->id, error_get_pretty(error));
|
|
error_free(error);
|
|
goto err;
|
|
}
|
|
|
|
if (bdrv_key_required(dinfo->bdrv))
|
|
autostart = 0;
|
|
|
|
QDECREF(bs_opts);
|
|
qemu_opts_del(opts);
|
|
|
|
return dinfo;
|
|
|
|
err:
|
|
bdrv_unref(dinfo->bdrv);
|
|
QTAILQ_REMOVE(&drives, dinfo, next);
|
|
bdrv_new_err:
|
|
g_free(dinfo->id);
|
|
g_free(dinfo);
|
|
early_err:
|
|
qemu_opts_del(opts);
|
|
err_no_opts:
|
|
QDECREF(bs_opts);
|
|
return NULL;
|
|
}
|
|
|
|
static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
|
|
{
|
|
const char *value;
|
|
|
|
value = qemu_opt_get(opts, from);
|
|
if (value) {
|
|
qemu_opt_set(opts, to, value);
|
|
qemu_opt_unset(opts, from);
|
|
}
|
|
}
|
|
|
|
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 = "cyls",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of cylinders (ide disk geometry)",
|
|
},{
|
|
.name = "heads",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of heads (ide disk geometry)",
|
|
},{
|
|
.name = "secs",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of sectors (ide disk geometry)",
|
|
},{
|
|
.name = "trans",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "chs translation (auto, lba, none)",
|
|
},{
|
|
.name = "boot",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "(deprecated, ignored)",
|
|
},{
|
|
.name = "addr",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "pci address (virtio only)",
|
|
},{
|
|
.name = "serial",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk serial number",
|
|
},{
|
|
.name = "file",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "file name",
|
|
},
|
|
|
|
/* Options that are passed on, but have special semantics with -drive */
|
|
{
|
|
.name = "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)
|
|
{
|
|
const char *value;
|
|
DriveInfo *dinfo = NULL;
|
|
QDict *bs_opts;
|
|
QemuOpts *legacy_opts;
|
|
DriveMediaType media = MEDIA_DISK;
|
|
BlockInterfaceType type;
|
|
int cyls, heads, secs, translation;
|
|
int max_devs, bus_id, unit_id, index;
|
|
const char *devaddr;
|
|
const char *werror, *rerror;
|
|
bool read_only = false;
|
|
bool copy_on_read;
|
|
const char *serial;
|
|
const char *filename;
|
|
Error *local_err = NULL;
|
|
|
|
/* Change legacy command line options into QMP ones */
|
|
qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
|
|
qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
|
|
qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");
|
|
|
|
qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
|
|
qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
|
|
qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
|
|
|
|
qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max");
|
|
qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max");
|
|
qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max");
|
|
|
|
qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max");
|
|
qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max");
|
|
qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max");
|
|
|
|
qemu_opt_rename(all_opts,
|
|
"iops_size", "throttling.iops-size");
|
|
|
|
qemu_opt_rename(all_opts, "readonly", "read-only");
|
|
|
|
value = qemu_opt_get(all_opts, "cache");
|
|
if (value) {
|
|
int flags = 0;
|
|
|
|
if (bdrv_parse_cache_flags(value, &flags) != 0) {
|
|
error_report("invalid cache option");
|
|
return NULL;
|
|
}
|
|
|
|
/* Specific options take precedence */
|
|
if (!qemu_opt_get(all_opts, "cache.writeback")) {
|
|
qemu_opt_set_bool(all_opts, "cache.writeback",
|
|
!!(flags & BDRV_O_CACHE_WB));
|
|
}
|
|
if (!qemu_opt_get(all_opts, "cache.direct")) {
|
|
qemu_opt_set_bool(all_opts, "cache.direct",
|
|
!!(flags & BDRV_O_NOCACHE));
|
|
}
|
|
if (!qemu_opt_get(all_opts, "cache.no-flush")) {
|
|
qemu_opt_set_bool(all_opts, "cache.no-flush",
|
|
!!(flags & BDRV_O_NO_FLUSH));
|
|
}
|
|
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);
|
|
qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
|
|
if (local_err) {
|
|
error_report("%s", error_get_pretty(local_err));
|
|
error_free(local_err);
|
|
goto fail;
|
|
}
|
|
|
|
/* Deprecated option boot=[on|off] */
|
|
if (qemu_opt_get(legacy_opts, "boot") != NULL) {
|
|
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
|
"ignored. Future versions will reject this parameter. Please "
|
|
"update your scripts.\n");
|
|
}
|
|
|
|
/* 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_report("'%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, "read-only", false);
|
|
copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
|
|
|
|
if (read_only && copy_on_read) {
|
|
error_report("warning: disabling copy-on-read on read-only drive");
|
|
copy_on_read = false;
|
|
}
|
|
|
|
qdict_put(bs_opts, "read-only",
|
|
qstring_from_str(read_only ? "on" : "off"));
|
|
qdict_put(bs_opts, "copy-on-read",
|
|
qstring_from_str(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_report("unsupported bus type '%s'", value);
|
|
goto fail;
|
|
}
|
|
} else {
|
|
type = block_default_type;
|
|
}
|
|
|
|
/* Geometry */
|
|
cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
|
|
heads = qemu_opt_get_number(legacy_opts, "heads", 0);
|
|
secs = qemu_opt_get_number(legacy_opts, "secs", 0);
|
|
|
|
if (cyls || heads || secs) {
|
|
if (cyls < 1) {
|
|
error_report("invalid physical cyls number");
|
|
goto fail;
|
|
}
|
|
if (heads < 1) {
|
|
error_report("invalid physical heads number");
|
|
goto fail;
|
|
}
|
|
if (secs < 1) {
|
|
error_report("invalid physical secs number");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
translation = BIOS_ATA_TRANSLATION_AUTO;
|
|
value = qemu_opt_get(legacy_opts, "trans");
|
|
if (value != NULL) {
|
|
if (!cyls) {
|
|
error_report("'%s' trans must be used with cyls, heads and secs",
|
|
value);
|
|
goto fail;
|
|
}
|
|
if (!strcmp(value, "none")) {
|
|
translation = BIOS_ATA_TRANSLATION_NONE;
|
|
} else if (!strcmp(value, "lba")) {
|
|
translation = BIOS_ATA_TRANSLATION_LBA;
|
|
} else if (!strcmp(value, "large")) {
|
|
translation = BIOS_ATA_TRANSLATION_LARGE;
|
|
} else if (!strcmp(value, "rechs")) {
|
|
translation = BIOS_ATA_TRANSLATION_RECHS;
|
|
} else if (!strcmp(value, "auto")) {
|
|
translation = BIOS_ATA_TRANSLATION_AUTO;
|
|
} else {
|
|
error_report("'%s' invalid translation type", value);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (media == MEDIA_CDROM) {
|
|
if (cyls || secs || heads) {
|
|
error_report("CHS can't be set with media=cdrom");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* 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_report("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_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
|
|
goto fail;
|
|
}
|
|
|
|
if (drive_get(type, bus_id, unit_id) != NULL) {
|
|
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
|
bus_id, unit_id, index);
|
|
goto fail;
|
|
}
|
|
|
|
/* Serial number */
|
|
serial = qemu_opt_get(legacy_opts, "serial");
|
|
|
|
/* 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(bs_opts, "id", qstring_from_str(new_id));
|
|
g_free(new_id);
|
|
}
|
|
|
|
/* Add virtio block device */
|
|
devaddr = qemu_opt_get(legacy_opts, "addr");
|
|
if (devaddr && type != IF_VIRTIO) {
|
|
error_report("addr is not supported by this bus type");
|
|
goto fail;
|
|
}
|
|
|
|
if (type == IF_VIRTIO) {
|
|
QemuOpts *devopts;
|
|
devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
|
|
&error_abort);
|
|
if (arch_type == QEMU_ARCH_S390X) {
|
|
qemu_opt_set(devopts, "driver", "virtio-blk-s390");
|
|
} else {
|
|
qemu_opt_set(devopts, "driver", "virtio-blk-pci");
|
|
}
|
|
qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"));
|
|
if (devaddr) {
|
|
qemu_opt_set(devopts, "addr", devaddr);
|
|
}
|
|
}
|
|
|
|
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_report("werror is not supported by this bus type");
|
|
goto fail;
|
|
}
|
|
qdict_put(bs_opts, "werror", qstring_from_str(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_report("rerror is not supported by this bus type");
|
|
goto fail;
|
|
}
|
|
qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
|
|
}
|
|
|
|
/* Actual block device init: Functionality shared with blockdev-add */
|
|
dinfo = blockdev_init(filename, bs_opts, &local_err);
|
|
bs_opts = NULL;
|
|
if (dinfo == NULL) {
|
|
if (local_err) {
|
|
error_report("%s", error_get_pretty(local_err));
|
|
error_free(local_err);
|
|
}
|
|
goto fail;
|
|
} else {
|
|
assert(!local_err);
|
|
}
|
|
|
|
/* Set legacy DriveInfo fields */
|
|
dinfo->enable_auto_del = true;
|
|
dinfo->opts = all_opts;
|
|
|
|
dinfo->cyls = cyls;
|
|
dinfo->heads = heads;
|
|
dinfo->secs = secs;
|
|
dinfo->trans = translation;
|
|
|
|
dinfo->type = type;
|
|
dinfo->bus = bus_id;
|
|
dinfo->unit = unit_id;
|
|
dinfo->devaddr = devaddr;
|
|
|
|
dinfo->serial = g_strdup(serial);
|
|
|
|
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);
|
|
QDECREF(bs_opts);
|
|
return dinfo;
|
|
}
|
|
|
|
void do_commit(Monitor *mon, const QDict *qdict)
|
|
{
|
|
const char *device = qdict_get_str(qdict, "device");
|
|
BlockDriverState *bs;
|
|
int ret;
|
|
|
|
if (!strcmp(device, "all")) {
|
|
ret = bdrv_commit_all();
|
|
} else {
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
monitor_printf(mon, "Device '%s' not found\n", device);
|
|
return;
|
|
}
|
|
ret = bdrv_commit(bs);
|
|
}
|
|
if (ret < 0) {
|
|
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
|
|
strerror(-ret));
|
|
}
|
|
}
|
|
|
|
static void blockdev_do_action(int kind, void *data, Error **errp)
|
|
{
|
|
TransactionAction action;
|
|
TransactionActionList list;
|
|
|
|
action.kind = kind;
|
|
action.data = data;
|
|
list.value = &action;
|
|
list.next = NULL;
|
|
qmp_transaction(&list, errp);
|
|
}
|
|
|
|
void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
|
|
bool has_node_name, const char *node_name,
|
|
const char *snapshot_file,
|
|
bool has_snapshot_node_name,
|
|
const char *snapshot_node_name,
|
|
bool has_format, const char *format,
|
|
bool has_mode, NewImageMode mode, Error **errp)
|
|
{
|
|
BlockdevSnapshot snapshot = {
|
|
.has_device = has_device,
|
|
.device = (char *) device,
|
|
.has_node_name = has_node_name,
|
|
.node_name = (char *) node_name,
|
|
.snapshot_file = (char *) snapshot_file,
|
|
.has_snapshot_node_name = has_snapshot_node_name,
|
|
.snapshot_node_name = (char *) snapshot_node_name,
|
|
.has_format = has_format,
|
|
.format = (char *) format,
|
|
.has_mode = has_mode,
|
|
.mode = mode,
|
|
};
|
|
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
|
|
&snapshot, errp);
|
|
}
|
|
|
|
void qmp_blockdev_snapshot_internal_sync(const char *device,
|
|
const char *name,
|
|
Error **errp)
|
|
{
|
|
BlockdevSnapshotInternal snapshot = {
|
|
.device = (char *) device,
|
|
.name = (char *) name
|
|
};
|
|
|
|
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
|
|
&snapshot, errp);
|
|
}
|
|
|
|
SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
|
|
bool has_id,
|
|
const char *id,
|
|
bool has_name,
|
|
const char *name,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs = bdrv_find(device);
|
|
QEMUSnapshotInfo sn;
|
|
Error *local_err = NULL;
|
|
SnapshotInfo *info = NULL;
|
|
int ret;
|
|
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return NULL;
|
|
}
|
|
|
|
if (!has_id) {
|
|
id = NULL;
|
|
}
|
|
|
|
if (!has_name) {
|
|
name = NULL;
|
|
}
|
|
|
|
if (!id && !name) {
|
|
error_setg(errp, "Name or id must be provided");
|
|
return NULL;
|
|
}
|
|
|
|
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return NULL;
|
|
}
|
|
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);
|
|
return NULL;
|
|
}
|
|
|
|
bdrv_snapshot_delete(bs, id, name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return NULL;
|
|
}
|
|
|
|
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;
|
|
|
|
return info;
|
|
}
|
|
|
|
/* New and old BlockDriverState structs for group snapshots */
|
|
|
|
typedef struct BlkTransactionState BlkTransactionState;
|
|
|
|
/* Only prepare() may fail. In a single transaction, only one of commit() or
|
|
abort() will be called, clean() will always be called if it present. */
|
|
typedef struct BdrvActionOps {
|
|
/* Size of state struct, in bytes. */
|
|
size_t instance_size;
|
|
/* Prepare the work, must NOT be NULL. */
|
|
void (*prepare)(BlkTransactionState *common, Error **errp);
|
|
/* Commit the changes, can be NULL. */
|
|
void (*commit)(BlkTransactionState *common);
|
|
/* Abort the changes on fail, can be NULL. */
|
|
void (*abort)(BlkTransactionState *common);
|
|
/* Clean up resource in the end, can be NULL. */
|
|
void (*clean)(BlkTransactionState *common);
|
|
} BdrvActionOps;
|
|
|
|
/*
|
|
* This structure must be arranged as first member in child type, assuming
|
|
* that compiler will also arrange it to the same address with parent instance.
|
|
* Later it will be used in free().
|
|
*/
|
|
struct BlkTransactionState {
|
|
TransactionAction *action;
|
|
const BdrvActionOps *ops;
|
|
QSIMPLEQ_ENTRY(BlkTransactionState) entry;
|
|
};
|
|
|
|
/* internal snapshot private data */
|
|
typedef struct InternalSnapshotState {
|
|
BlkTransactionState common;
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo sn;
|
|
} InternalSnapshotState;
|
|
|
|
static void internal_snapshot_prepare(BlkTransactionState *common,
|
|
Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
const char *device;
|
|
const char *name;
|
|
BlockDriverState *bs;
|
|
QEMUSnapshotInfo old_sn, *sn;
|
|
bool ret;
|
|
qemu_timeval tv;
|
|
BlockdevSnapshotInternal *internal;
|
|
InternalSnapshotState *state;
|
|
int ret1;
|
|
|
|
g_assert(common->action->kind ==
|
|
TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
|
|
internal = common->action->blockdev_snapshot_internal_sync;
|
|
state = DO_UPCAST(InternalSnapshotState, common, common);
|
|
|
|
/* 1. parse input */
|
|
device = internal->device;
|
|
name = internal->name;
|
|
|
|
/* 2. check for validation */
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_inserted(bs)) {
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
return;
|
|
}
|
|
|
|
if (bdrv_is_read_only(bs)) {
|
|
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_can_snapshot(bs)) {
|
|
error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
|
|
bs->drv->format_name, device, "internal snapshot");
|
|
return;
|
|
}
|
|
|
|
if (!strlen(name)) {
|
|
error_setg(errp, "Name is empty");
|
|
return;
|
|
}
|
|
|
|
/* 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);
|
|
return;
|
|
} else if (ret) {
|
|
error_setg(errp,
|
|
"Snapshot with name '%s' already exists on device '%s'",
|
|
name, device);
|
|
return;
|
|
}
|
|
|
|
/* 3. take the snapshot */
|
|
sn = &state->sn;
|
|
pstrcpy(sn->name, sizeof(sn->name), name);
|
|
qemu_gettimeofday(&tv);
|
|
sn->date_sec = tv.tv_sec;
|
|
sn->date_nsec = tv.tv_usec * 1000;
|
|
sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
|
|
ret1 = bdrv_snapshot_create(bs, sn);
|
|
if (ret1 < 0) {
|
|
error_setg_errno(errp, -ret1,
|
|
"Failed to create snapshot '%s' on device '%s'",
|
|
name, device);
|
|
return;
|
|
}
|
|
|
|
/* 4. succeed, mark a snapshot is created */
|
|
state->bs = bs;
|
|
}
|
|
|
|
static void internal_snapshot_abort(BlkTransactionState *common)
|
|
{
|
|
InternalSnapshotState *state =
|
|
DO_UPCAST(InternalSnapshotState, common, common);
|
|
BlockDriverState *bs = state->bs;
|
|
QEMUSnapshotInfo *sn = &state->sn;
|
|
Error *local_error = NULL;
|
|
|
|
if (!bs) {
|
|
return;
|
|
}
|
|
|
|
if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
|
|
error_report("Failed to delete snapshot with id '%s' and name '%s' on "
|
|
"device '%s' in abort: %s",
|
|
sn->id_str,
|
|
sn->name,
|
|
bdrv_get_device_name(bs),
|
|
error_get_pretty(local_error));
|
|
error_free(local_error);
|
|
}
|
|
}
|
|
|
|
/* external snapshot private data */
|
|
typedef struct ExternalSnapshotState {
|
|
BlkTransactionState common;
|
|
BlockDriverState *old_bs;
|
|
BlockDriverState *new_bs;
|
|
} ExternalSnapshotState;
|
|
|
|
static void external_snapshot_prepare(BlkTransactionState *common,
|
|
Error **errp)
|
|
{
|
|
BlockDriver *drv;
|
|
int flags, ret;
|
|
QDict *options = NULL;
|
|
Error *local_err = NULL;
|
|
bool has_device = false;
|
|
const char *device;
|
|
bool has_node_name = false;
|
|
const char *node_name;
|
|
bool has_snapshot_node_name = false;
|
|
const char *snapshot_node_name;
|
|
const char *new_image_file;
|
|
const char *format = "qcow2";
|
|
enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
ExternalSnapshotState *state =
|
|
DO_UPCAST(ExternalSnapshotState, common, common);
|
|
TransactionAction *action = common->action;
|
|
|
|
/* get parameters */
|
|
g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
|
|
|
|
has_device = action->blockdev_snapshot_sync->has_device;
|
|
device = action->blockdev_snapshot_sync->device;
|
|
has_node_name = action->blockdev_snapshot_sync->has_node_name;
|
|
node_name = action->blockdev_snapshot_sync->node_name;
|
|
has_snapshot_node_name =
|
|
action->blockdev_snapshot_sync->has_snapshot_node_name;
|
|
snapshot_node_name = action->blockdev_snapshot_sync->snapshot_node_name;
|
|
|
|
new_image_file = action->blockdev_snapshot_sync->snapshot_file;
|
|
if (action->blockdev_snapshot_sync->has_format) {
|
|
format = action->blockdev_snapshot_sync->format;
|
|
}
|
|
if (action->blockdev_snapshot_sync->has_mode) {
|
|
mode = action->blockdev_snapshot_sync->mode;
|
|
}
|
|
|
|
/* start processing */
|
|
drv = bdrv_find_format(format);
|
|
if (!drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
|
|
state->old_bs = bdrv_lookup_bs(has_device ? device : NULL,
|
|
has_node_name ? node_name : NULL,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (has_node_name && !has_snapshot_node_name) {
|
|
error_setg(errp, "New snapshot node name missing");
|
|
return;
|
|
}
|
|
|
|
if (has_snapshot_node_name && bdrv_find_node(snapshot_node_name)) {
|
|
error_setg(errp, "New snapshot node name already existing");
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_inserted(state->old_bs)) {
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
return;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(state->old_bs,
|
|
BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_read_only(state->old_bs)) {
|
|
if (bdrv_flush(state->old_bs)) {
|
|
error_set(errp, QERR_IO_ERROR);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (!bdrv_is_first_non_filter(state->old_bs)) {
|
|
error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
|
|
return;
|
|
}
|
|
|
|
flags = state->old_bs->open_flags;
|
|
|
|
/* create new image w/backing file */
|
|
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
|
bdrv_img_create(new_image_file, format,
|
|
state->old_bs->filename,
|
|
state->old_bs->drv->format_name,
|
|
NULL, -1, flags, &local_err, false);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (has_snapshot_node_name) {
|
|
options = qdict_new();
|
|
qdict_put(options, "node-name",
|
|
qstring_from_str(snapshot_node_name));
|
|
}
|
|
|
|
/* TODO Inherit bs->options or only take explicit options with an
|
|
* extended QMP command? */
|
|
assert(state->new_bs == NULL);
|
|
ret = bdrv_open(&state->new_bs, new_image_file, NULL, options,
|
|
flags | BDRV_O_NO_BACKING, drv, &local_err);
|
|
/* We will manually add the backing_hd field to the bs later */
|
|
if (ret != 0) {
|
|
error_propagate(errp, local_err);
|
|
}
|
|
}
|
|
|
|
static void external_snapshot_commit(BlkTransactionState *common)
|
|
{
|
|
ExternalSnapshotState *state =
|
|
DO_UPCAST(ExternalSnapshotState, common, common);
|
|
|
|
/* This removes our old bs and adds the new bs */
|
|
bdrv_append(state->new_bs, state->old_bs);
|
|
/* 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 */
|
|
bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
|
|
NULL);
|
|
}
|
|
|
|
static void external_snapshot_abort(BlkTransactionState *common)
|
|
{
|
|
ExternalSnapshotState *state =
|
|
DO_UPCAST(ExternalSnapshotState, common, common);
|
|
if (state->new_bs) {
|
|
bdrv_unref(state->new_bs);
|
|
}
|
|
}
|
|
|
|
typedef struct DriveBackupState {
|
|
BlkTransactionState common;
|
|
BlockDriverState *bs;
|
|
BlockJob *job;
|
|
} DriveBackupState;
|
|
|
|
static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
|
|
{
|
|
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
|
|
DriveBackup *backup;
|
|
Error *local_err = NULL;
|
|
|
|
assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
|
|
backup = common->action->drive_backup;
|
|
|
|
qmp_drive_backup(backup->device, backup->target,
|
|
backup->has_format, backup->format,
|
|
backup->sync,
|
|
backup->has_mode, backup->mode,
|
|
backup->has_speed, backup->speed,
|
|
backup->has_on_source_error, backup->on_source_error,
|
|
backup->has_on_target_error, backup->on_target_error,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
state->bs = NULL;
|
|
state->job = NULL;
|
|
return;
|
|
}
|
|
|
|
state->bs = bdrv_find(backup->device);
|
|
state->job = state->bs->job;
|
|
}
|
|
|
|
static void drive_backup_abort(BlkTransactionState *common)
|
|
{
|
|
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
|
|
BlockDriverState *bs = state->bs;
|
|
|
|
/* Only cancel if it's the job we started */
|
|
if (bs && bs->job && bs->job == state->job) {
|
|
block_job_cancel_sync(bs->job);
|
|
}
|
|
}
|
|
|
|
static void abort_prepare(BlkTransactionState *common, Error **errp)
|
|
{
|
|
error_setg(errp, "Transaction aborted using Abort action");
|
|
}
|
|
|
|
static void abort_commit(BlkTransactionState *common)
|
|
{
|
|
g_assert_not_reached(); /* this action never succeeds */
|
|
}
|
|
|
|
static const BdrvActionOps actions[] = {
|
|
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
|
|
.instance_size = sizeof(ExternalSnapshotState),
|
|
.prepare = external_snapshot_prepare,
|
|
.commit = external_snapshot_commit,
|
|
.abort = external_snapshot_abort,
|
|
},
|
|
[TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
|
|
.instance_size = sizeof(DriveBackupState),
|
|
.prepare = drive_backup_prepare,
|
|
.abort = drive_backup_abort,
|
|
},
|
|
[TRANSACTION_ACTION_KIND_ABORT] = {
|
|
.instance_size = sizeof(BlkTransactionState),
|
|
.prepare = abort_prepare,
|
|
.commit = abort_commit,
|
|
},
|
|
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
|
|
.instance_size = sizeof(InternalSnapshotState),
|
|
.prepare = internal_snapshot_prepare,
|
|
.abort = internal_snapshot_abort,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
|
* then we do not pivot any of the devices in the group, and abandon the
|
|
* snapshots
|
|
*/
|
|
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
|
|
{
|
|
TransactionActionList *dev_entry = dev_list;
|
|
BlkTransactionState *state, *next;
|
|
Error *local_err = NULL;
|
|
|
|
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
|
|
QSIMPLEQ_INIT(&snap_bdrv_states);
|
|
|
|
/* drain all i/o before any snapshots */
|
|
bdrv_drain_all();
|
|
|
|
/* We don't do anything in this loop that commits us to the snapshot */
|
|
while (NULL != dev_entry) {
|
|
TransactionAction *dev_info = NULL;
|
|
const BdrvActionOps *ops;
|
|
|
|
dev_info = dev_entry->value;
|
|
dev_entry = dev_entry->next;
|
|
|
|
assert(dev_info->kind < ARRAY_SIZE(actions));
|
|
|
|
ops = &actions[dev_info->kind];
|
|
assert(ops->instance_size > 0);
|
|
|
|
state = g_malloc0(ops->instance_size);
|
|
state->ops = ops;
|
|
state->action = dev_info;
|
|
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
|
|
|
|
state->ops->prepare(state, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto delete_and_fail;
|
|
}
|
|
}
|
|
|
|
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
|
|
if (state->ops->commit) {
|
|
state->ops->commit(state);
|
|
}
|
|
}
|
|
|
|
/* success */
|
|
goto exit;
|
|
|
|
delete_and_fail:
|
|
/*
|
|
* failure, and it is all-or-none; abandon each new bs, and keep using
|
|
* the original bs for all images
|
|
*/
|
|
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
|
|
if (state->ops->abort) {
|
|
state->ops->abort(state);
|
|
}
|
|
}
|
|
exit:
|
|
QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
|
|
if (state->ops->clean) {
|
|
state->ops->clean(state);
|
|
}
|
|
g_free(state);
|
|
}
|
|
}
|
|
|
|
|
|
static void eject_device(BlockDriverState *bs, int force, Error **errp)
|
|
{
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
|
|
return;
|
|
}
|
|
if (!bdrv_dev_has_removable_media(bs)) {
|
|
error_setg(errp, "Device '%s' is not removable",
|
|
bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
|
|
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
|
bdrv_dev_eject_request(bs, force);
|
|
if (!force) {
|
|
error_setg(errp, "Device '%s' is locked",
|
|
bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
}
|
|
|
|
bdrv_close(bs);
|
|
}
|
|
|
|
void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
eject_device(bs, force, errp);
|
|
}
|
|
|
|
void qmp_block_passwd(bool has_device, const char *device,
|
|
bool has_node_name, const char *node_name,
|
|
const char *password, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
BlockDriverState *bs;
|
|
int err;
|
|
|
|
bs = bdrv_lookup_bs(has_device ? device : NULL,
|
|
has_node_name ? node_name : NULL,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
err = bdrv_set_key(bs, password);
|
|
if (err == -EINVAL) {
|
|
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
|
|
return;
|
|
} else if (err < 0) {
|
|
error_set(errp, QERR_INVALID_PASSWORD);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
|
|
int bdrv_flags, BlockDriver *drv,
|
|
const char *password, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
int ret;
|
|
|
|
ret = bdrv_open(&bs, filename, NULL, NULL, bdrv_flags, drv, &local_err);
|
|
if (ret < 0) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (bdrv_key_required(bs)) {
|
|
if (password) {
|
|
if (bdrv_set_key(bs, password) < 0) {
|
|
error_set(errp, QERR_INVALID_PASSWORD);
|
|
}
|
|
} else {
|
|
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
|
|
bdrv_get_encrypted_filename(bs));
|
|
}
|
|
} else if (password) {
|
|
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
|
|
}
|
|
}
|
|
|
|
void qmp_change_blockdev(const char *device, const char *filename,
|
|
const char *format, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriver *drv = NULL;
|
|
int bdrv_flags;
|
|
Error *err = NULL;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (format) {
|
|
drv = bdrv_find_whitelisted_format(format, bs->read_only);
|
|
if (!drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
}
|
|
|
|
eject_device(bs, 0, &err);
|
|
if (err) {
|
|
error_propagate(errp, err);
|
|
return;
|
|
}
|
|
|
|
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
|
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
|
|
|
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
|
}
|
|
|
|
/* throttling disk I/O limits */
|
|
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
|
|
int64_t bps_wr,
|
|
int64_t iops,
|
|
int64_t iops_rd,
|
|
int64_t iops_wr,
|
|
bool has_bps_max,
|
|
int64_t bps_max,
|
|
bool has_bps_rd_max,
|
|
int64_t bps_rd_max,
|
|
bool has_bps_wr_max,
|
|
int64_t bps_wr_max,
|
|
bool has_iops_max,
|
|
int64_t iops_max,
|
|
bool has_iops_rd_max,
|
|
int64_t iops_rd_max,
|
|
bool has_iops_wr_max,
|
|
int64_t iops_wr_max,
|
|
bool has_iops_size,
|
|
int64_t iops_size, Error **errp)
|
|
{
|
|
ThrottleConfig cfg;
|
|
BlockDriverState *bs;
|
|
AioContext *aio_context;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
memset(&cfg, 0, sizeof(cfg));
|
|
cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
|
|
cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
|
|
cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
|
|
|
|
cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
|
|
cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
|
|
cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
|
|
|
|
if (has_bps_max) {
|
|
cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
|
|
}
|
|
if (has_bps_rd_max) {
|
|
cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
|
|
}
|
|
if (has_bps_wr_max) {
|
|
cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
|
|
}
|
|
if (has_iops_max) {
|
|
cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
|
|
}
|
|
if (has_iops_rd_max) {
|
|
cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
|
|
}
|
|
if (has_iops_wr_max) {
|
|
cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
|
|
}
|
|
|
|
if (has_iops_size) {
|
|
cfg.op_size = iops_size;
|
|
}
|
|
|
|
if (!check_throttle_config(&cfg, errp)) {
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
|
|
bdrv_io_limits_enable(bs);
|
|
} else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) {
|
|
bdrv_io_limits_disable(bs);
|
|
}
|
|
|
|
if (bs->io_limits_enabled) {
|
|
bdrv_set_io_limits(bs, &cfg);
|
|
}
|
|
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
|
{
|
|
const char *id = qdict_get_str(qdict, "id");
|
|
BlockDriverState *bs;
|
|
Error *local_err = NULL;
|
|
|
|
bs = bdrv_find(id);
|
|
if (!bs) {
|
|
error_report("Device '%s' not found", id);
|
|
return -1;
|
|
}
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
|
|
error_report("%s", error_get_pretty(local_err));
|
|
error_free(local_err);
|
|
return -1;
|
|
}
|
|
|
|
/* quiesce block driver; prevent further io */
|
|
bdrv_drain_all();
|
|
bdrv_flush(bs);
|
|
bdrv_close(bs);
|
|
|
|
/* if we have a device attached to this BlockDriverState
|
|
* then we need to make the drive anonymous until the device
|
|
* can be removed. If this is a drive with no device backing
|
|
* then we can just get rid of the block driver state right here.
|
|
*/
|
|
if (bdrv_get_attached_dev(bs)) {
|
|
bdrv_make_anon(bs);
|
|
|
|
/* Further I/O must not pause the guest */
|
|
bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
|
|
BLOCKDEV_ON_ERROR_REPORT);
|
|
} else {
|
|
drive_del(drive_get_by_blockdev(bs));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void qmp_block_resize(bool has_device, const char *device,
|
|
bool has_node_name, const char *node_name,
|
|
int64_t size, Error **errp)
|
|
{
|
|
Error *local_err = NULL;
|
|
BlockDriverState *bs;
|
|
AioContext *aio_context;
|
|
int ret;
|
|
|
|
bs = bdrv_lookup_bs(has_device ? device : NULL,
|
|
has_node_name ? node_name : NULL,
|
|
&local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
aio_context = bdrv_get_aio_context(bs);
|
|
aio_context_acquire(aio_context);
|
|
|
|
if (!bdrv_is_first_non_filter(bs)) {
|
|
error_set(errp, QERR_FEATURE_DISABLED, "resize");
|
|
goto out;
|
|
}
|
|
|
|
if (size < 0) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
|
|
goto out;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
|
|
error_set(errp, QERR_DEVICE_IN_USE, device);
|
|
goto out;
|
|
}
|
|
|
|
/* complete all in-flight operations before resizing the device */
|
|
bdrv_drain_all();
|
|
|
|
ret = bdrv_truncate(bs, size);
|
|
switch (ret) {
|
|
case 0:
|
|
break;
|
|
case -ENOMEDIUM:
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
break;
|
|
case -ENOTSUP:
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
break;
|
|
case -EACCES:
|
|
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
|
|
break;
|
|
case -EBUSY:
|
|
error_set(errp, QERR_DEVICE_IN_USE, device);
|
|
break;
|
|
default:
|
|
error_setg_errno(errp, -ret, "Could not resize");
|
|
break;
|
|
}
|
|
|
|
out:
|
|
aio_context_release(aio_context);
|
|
}
|
|
|
|
static void block_job_cb(void *opaque, int ret)
|
|
{
|
|
BlockDriverState *bs = opaque;
|
|
const char *msg = NULL;
|
|
|
|
trace_block_job_cb(bs, bs->job, ret);
|
|
|
|
assert(bs->job);
|
|
|
|
if (ret < 0) {
|
|
msg = strerror(-ret);
|
|
}
|
|
|
|
if (block_job_is_cancelled(bs->job)) {
|
|
block_job_event_cancelled(bs->job);
|
|
} else {
|
|
block_job_event_completed(bs->job, msg);
|
|
}
|
|
|
|
bdrv_put_ref_bh_schedule(bs);
|
|
}
|
|
|
|
void qmp_block_stream(const char *device,
|
|
bool has_base, const char *base,
|
|
bool has_backing_file, const char *backing_file,
|
|
bool has_speed, int64_t speed,
|
|
bool has_on_error, BlockdevOnError on_error,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *base_bs = NULL;
|
|
Error *local_err = NULL;
|
|
const char *base_name = NULL;
|
|
|
|
if (!has_on_error) {
|
|
on_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (has_base) {
|
|
base_bs = bdrv_find_backing_image(bs, base);
|
|
if (base_bs == NULL) {
|
|
error_set(errp, QERR_BASE_NOT_FOUND, base);
|
|
return;
|
|
}
|
|
base_name = base;
|
|
}
|
|
|
|
/* if we are streaming the entire chain, the result will have no backing
|
|
* file, and specifying one is therefore an error */
|
|
if (base_bs == NULL && has_backing_file) {
|
|
error_setg(errp, "backing file specified, but streaming the "
|
|
"entire chain");
|
|
return;
|
|
}
|
|
|
|
/* backing_file string overrides base bs filename */
|
|
base_name = has_backing_file ? backing_file : base_name;
|
|
|
|
stream_start(bs, base_bs, base_name, has_speed ? speed : 0,
|
|
on_error, block_job_cb, bs, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_stream(bs, bs->job);
|
|
}
|
|
|
|
void qmp_block_commit(const char *device,
|
|
bool has_base, const char *base,
|
|
bool has_top, const char *top,
|
|
bool has_backing_file, const char *backing_file,
|
|
bool has_speed, int64_t speed,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *base_bs, *top_bs;
|
|
Error *local_err = NULL;
|
|
/* This will be part of the QMP command, if/when the
|
|
* BlockdevOnError change for blkmirror makes it in
|
|
*/
|
|
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
|
|
if (!has_speed) {
|
|
speed = 0;
|
|
}
|
|
|
|
/* drain all i/o before commits */
|
|
bdrv_drain_all();
|
|
|
|
/* 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 = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT, errp)) {
|
|
return;
|
|
}
|
|
|
|
/* default top_bs is the active layer */
|
|
top_bs = bs;
|
|
|
|
if (has_top && top) {
|
|
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");
|
|
return;
|
|
}
|
|
|
|
if (has_base && base) {
|
|
base_bs = bdrv_find_backing_image(top_bs, base);
|
|
} else {
|
|
base_bs = bdrv_find_base(top_bs);
|
|
}
|
|
|
|
if (base_bs == NULL) {
|
|
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
|
return;
|
|
}
|
|
|
|
/* Do not allow attempts to commit an image into itself */
|
|
if (top_bs == base_bs) {
|
|
error_setg(errp, "cannot commit an image into itself");
|
|
return;
|
|
}
|
|
|
|
if (top_bs == bs) {
|
|
if (has_backing_file) {
|
|
error_setg(errp, "'backing-file' specified,"
|
|
" but 'top' is the active layer");
|
|
return;
|
|
}
|
|
commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
|
|
bs, &local_err);
|
|
} else {
|
|
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
|
|
has_backing_file ? backing_file : NULL, &local_err);
|
|
}
|
|
if (local_err != NULL) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
void qmp_drive_backup(const char *device, const char *target,
|
|
bool has_format, const char *format,
|
|
enum MirrorSyncMode sync,
|
|
bool has_mode, enum NewImageMode mode,
|
|
bool has_speed, int64_t speed,
|
|
bool has_on_source_error, BlockdevOnError on_source_error,
|
|
bool has_on_target_error, BlockdevOnError on_target_error,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *target_bs;
|
|
BlockDriverState *source = NULL;
|
|
BlockDriver *drv = NULL;
|
|
Error *local_err = NULL;
|
|
int flags;
|
|
int64_t size;
|
|
int ret;
|
|
|
|
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_mode) {
|
|
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
}
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_inserted(bs)) {
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
return;
|
|
}
|
|
|
|
if (!has_format) {
|
|
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
|
}
|
|
if (format) {
|
|
drv = bdrv_find_format(format);
|
|
if (!drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
|
|
return;
|
|
}
|
|
|
|
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 (sync == MIRROR_SYNC_MODE_TOP) {
|
|
source = bs->backing_hd;
|
|
if (!source) {
|
|
sync = MIRROR_SYNC_MODE_FULL;
|
|
}
|
|
}
|
|
if (sync == MIRROR_SYNC_MODE_NONE) {
|
|
source = bs;
|
|
}
|
|
|
|
size = bdrv_getlength(bs);
|
|
if (size < 0) {
|
|
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
|
return;
|
|
}
|
|
|
|
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
|
assert(format && drv);
|
|
if (source) {
|
|
bdrv_img_create(target, format, source->filename,
|
|
source->drv->format_name, NULL,
|
|
size, flags, &local_err, false);
|
|
} else {
|
|
bdrv_img_create(target, format, NULL, NULL, NULL,
|
|
size, flags, &local_err, false);
|
|
}
|
|
}
|
|
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
target_bs = NULL;
|
|
ret = bdrv_open(&target_bs, target, NULL, NULL, flags, drv, &local_err);
|
|
if (ret < 0) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
|
|
block_job_cb, bs, &local_err);
|
|
if (local_err != NULL) {
|
|
bdrv_unref(target_bs);
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
|
|
{
|
|
return bdrv_named_nodes_list();
|
|
}
|
|
|
|
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
|
|
|
|
void qmp_drive_mirror(const char *device, const char *target,
|
|
bool has_format, const char *format,
|
|
bool has_node_name, const char *node_name,
|
|
bool has_replaces, const char *replaces,
|
|
enum MirrorSyncMode sync,
|
|
bool has_mode, enum NewImageMode mode,
|
|
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,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *source, *target_bs;
|
|
BlockDriver *drv = NULL;
|
|
Error *local_err = NULL;
|
|
QDict *options = NULL;
|
|
int flags;
|
|
int64_t size;
|
|
int ret;
|
|
|
|
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_mode) {
|
|
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
}
|
|
if (!has_granularity) {
|
|
granularity = 0;
|
|
}
|
|
if (!has_buf_size) {
|
|
buf_size = DEFAULT_MIRROR_BUF_SIZE;
|
|
}
|
|
|
|
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
|
|
"a value in range [512B, 64MB]");
|
|
return;
|
|
}
|
|
if (granularity & (granularity - 1)) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", "power of 2");
|
|
return;
|
|
}
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_inserted(bs)) {
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
return;
|
|
}
|
|
|
|
if (!has_format) {
|
|
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
|
}
|
|
if (format) {
|
|
drv = bdrv_find_format(format);
|
|
if (!drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) {
|
|
return;
|
|
}
|
|
|
|
flags = bs->open_flags | BDRV_O_RDWR;
|
|
source = bs->backing_hd;
|
|
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
|
sync = MIRROR_SYNC_MODE_FULL;
|
|
}
|
|
if (sync == MIRROR_SYNC_MODE_NONE) {
|
|
source = bs;
|
|
}
|
|
|
|
size = bdrv_getlength(bs);
|
|
if (size < 0) {
|
|
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
|
return;
|
|
}
|
|
|
|
if (has_replaces) {
|
|
BlockDriverState *to_replace_bs;
|
|
|
|
if (!has_node_name) {
|
|
error_setg(errp, "a node-name must be provided when replacing a"
|
|
" named node of the graph");
|
|
return;
|
|
}
|
|
|
|
to_replace_bs = check_to_replace_node(replaces, &local_err);
|
|
|
|
if (!to_replace_bs) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (size != bdrv_getlength(to_replace_bs)) {
|
|
error_setg(errp, "cannot replace image with a mirror image of "
|
|
"different size");
|
|
return;
|
|
}
|
|
}
|
|
|
|
if ((sync == MIRROR_SYNC_MODE_FULL || !source)
|
|
&& mode != NEW_IMAGE_MODE_EXISTING)
|
|
{
|
|
/* create new image w/o backing file */
|
|
assert(format && drv);
|
|
bdrv_img_create(target, format,
|
|
NULL, NULL, NULL, size, flags, &local_err, false);
|
|
} else {
|
|
switch (mode) {
|
|
case NEW_IMAGE_MODE_EXISTING:
|
|
break;
|
|
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
|
/* create new image with backing file */
|
|
bdrv_img_create(target, format,
|
|
source->filename,
|
|
source->drv->format_name,
|
|
NULL, size, flags, &local_err, false);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (has_node_name) {
|
|
options = qdict_new();
|
|
qdict_put(options, "node-name", qstring_from_str(node_name));
|
|
}
|
|
|
|
/* Mirroring takes care of copy-on-write using the source's backing
|
|
* file.
|
|
*/
|
|
target_bs = NULL;
|
|
ret = bdrv_open(&target_bs, target, NULL, options,
|
|
flags | BDRV_O_NO_BACKING, drv, &local_err);
|
|
if (ret < 0) {
|
|
error_propagate(errp, local_err);
|
|
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(bs, target_bs,
|
|
has_replaces ? replaces : NULL,
|
|
speed, granularity, buf_size, sync,
|
|
on_source_error, on_target_error,
|
|
block_job_cb, bs, &local_err);
|
|
if (local_err != NULL) {
|
|
bdrv_unref(target_bs);
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static BlockJob *find_block_job(const char *device)
|
|
{
|
|
BlockDriverState *bs;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs || !bs->job) {
|
|
return NULL;
|
|
}
|
|
return bs->job;
|
|
}
|
|
|
|
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
block_job_set_speed(job, speed, errp);
|
|
}
|
|
|
|
void qmp_block_job_cancel(const char *device,
|
|
bool has_force, bool force, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!has_force) {
|
|
force = false;
|
|
}
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
if (job->paused && !force) {
|
|
error_setg(errp, "The block job for device '%s' is currently paused",
|
|
device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_cancel(job);
|
|
block_job_cancel(job);
|
|
}
|
|
|
|
void qmp_block_job_pause(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_pause(job);
|
|
block_job_pause(job);
|
|
}
|
|
|
|
void qmp_block_job_resume(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_resume(job);
|
|
block_job_resume(job);
|
|
}
|
|
|
|
void qmp_block_job_complete(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_complete(job);
|
|
block_job_complete(job, errp);
|
|
}
|
|
|
|
void qmp_change_backing_file(const char *device,
|
|
const char *image_node_name,
|
|
const char *backing_file,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs = NULL;
|
|
BlockDriverState *image_bs = NULL;
|
|
Error *local_err = NULL;
|
|
bool ro;
|
|
int open_flags;
|
|
int ret;
|
|
|
|
/* find the top layer BDS of the chain */
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
if (!image_bs) {
|
|
error_setg(errp, "image file not found");
|
|
return;
|
|
}
|
|
|
|
if (bdrv_find_base(image_bs) == image_bs) {
|
|
error_setg(errp, "not allowing backing file change on an image "
|
|
"without a backing file");
|
|
return;
|
|
}
|
|
|
|
/* 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)) {
|
|
return;
|
|
}
|
|
|
|
/* final sanity check */
|
|
if (!bdrv_chain_contains(bs, image_bs)) {
|
|
error_setg(errp, "'%s' and image file are not in the same chain",
|
|
device);
|
|
return;
|
|
}
|
|
|
|
/* if not r/w, reopen to make r/w */
|
|
open_flags = image_bs->open_flags;
|
|
ro = bdrv_is_read_only(image_bs);
|
|
|
|
if (ro) {
|
|
bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
ret = bdrv_change_backing_file(image_bs, backing_file,
|
|
image_bs->drv ? image_bs->drv->format_name : "");
|
|
|
|
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(image_bs, open_flags, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err); /* will preserve prior errp */
|
|
}
|
|
}
|
|
}
|
|
|
|
void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
|
|
{
|
|
QmpOutputVisitor *ov = qmp_output_visitor_new();
|
|
DriveInfo *dinfo;
|
|
QObject *obj;
|
|
QDict *qdict;
|
|
Error *local_err = NULL;
|
|
|
|
/* Require an ID in the top level */
|
|
if (!options->has_id) {
|
|
error_setg(errp, "Block device needs an ID");
|
|
goto fail;
|
|
}
|
|
|
|
/* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
|
|
* cache.direct=false instead of silently switching to aio=threads, except
|
|
* when called from drive_new().
|
|
*
|
|
* For now, simply forbidding the combination for all drivers will do. */
|
|
if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
|
|
bool direct = options->has_cache &&
|
|
options->cache->has_direct &&
|
|
options->cache->direct;
|
|
if (!direct) {
|
|
error_setg(errp, "aio=native requires cache.direct=true");
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
|
|
&options, NULL, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto fail;
|
|
}
|
|
|
|
obj = qmp_output_get_qobject(ov);
|
|
qdict = qobject_to_qdict(obj);
|
|
|
|
qdict_flatten(qdict);
|
|
|
|
dinfo = blockdev_init(NULL, qdict, &local_err);
|
|
if (local_err) {
|
|
error_propagate(errp, local_err);
|
|
goto fail;
|
|
}
|
|
|
|
if (bdrv_key_required(dinfo->bdrv)) {
|
|
drive_del(dinfo);
|
|
error_setg(errp, "blockdev-add doesn't support encrypted devices");
|
|
goto fail;
|
|
}
|
|
|
|
fail:
|
|
qmp_output_visitor_cleanup(ov);
|
|
}
|
|
|
|
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
|
|
{
|
|
BlockJobInfoList **prev = opaque;
|
|
BlockJob *job = bs->job;
|
|
|
|
if (job) {
|
|
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
|
elem->value = block_job_query(bs->job);
|
|
(*prev)->next = elem;
|
|
*prev = elem;
|
|
}
|
|
}
|
|
|
|
BlockJobInfoList *qmp_query_block_jobs(Error **errp)
|
|
{
|
|
/* Dummy is a fake list element for holding the head pointer */
|
|
BlockJobInfoList dummy = {};
|
|
BlockJobInfoList *prev = &dummy;
|
|
bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
|
|
return dummy.next;
|
|
}
|
|
|
|
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 = "discard",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "discard operation (ignore/off, unmap/on)",
|
|
},{
|
|
.name = "cache.writeback",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "enables writeback mode for any caches",
|
|
},{
|
|
.name = "cache.direct",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "enables use of O_DIRECT (bypass the host page cache)",
|
|
},{
|
|
.name = "cache.no-flush",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "ignore any flush requests for the device",
|
|
},{
|
|
.name = "aio",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "host AIO implementation (threads, native)",
|
|
},{
|
|
.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 = "read-only",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "open drive file as read-only",
|
|
},{
|
|
.name = "throttling.iops-total",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit total I/O operations per second",
|
|
},{
|
|
.name = "throttling.iops-read",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit read operations per second",
|
|
},{
|
|
.name = "throttling.iops-write",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit write operations per second",
|
|
},{
|
|
.name = "throttling.bps-total",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit total bytes per second",
|
|
},{
|
|
.name = "throttling.bps-read",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit read bytes per second",
|
|
},{
|
|
.name = "throttling.bps-write",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit write bytes per second",
|
|
},{
|
|
.name = "throttling.iops-total-max",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "I/O operations burst",
|
|
},{
|
|
.name = "throttling.iops-read-max",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "I/O operations read burst",
|
|
},{
|
|
.name = "throttling.iops-write-max",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "I/O operations write burst",
|
|
},{
|
|
.name = "throttling.bps-total-max",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "total bytes burst",
|
|
},{
|
|
.name = "throttling.bps-read-max",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "total bytes read burst",
|
|
},{
|
|
.name = "throttling.bps-write-max",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "total bytes write burst",
|
|
},{
|
|
.name = "throttling.iops-size",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "when limiting by iops max size of an I/O in bytes",
|
|
},{
|
|
.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)",
|
|
},
|
|
{ /* 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 */ }
|
|
},
|
|
};
|