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/*
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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 "qapi/qmp/qerror.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 "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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extern QemuOptsList qemu_common_drive_opts;
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|
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static const char *const if_name[IF_COUNT] = { |
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[IF_NONE] = "none",
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[IF_IDE] = "ide",
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[IF_SCSI] = "scsi",
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[IF_FLOPPY] = "floppy",
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[IF_PFLASH] = "pflash",
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[IF_MTD] = "mtd",
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[IF_SD] = "sd",
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[IF_VIRTIO] = "virtio",
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[IF_XEN] = "xen",
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}; |
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static 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 (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_put_ref(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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static void drive_uninit(DriveInfo *dinfo) |
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{ |
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qemu_opts_del(dinfo->opts); |
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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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void drive_put_ref(DriveInfo *dinfo)
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{ |
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assert(dinfo->refcount); |
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if (--dinfo->refcount == 0) { |
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drive_uninit(dinfo); |
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} |
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} |
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void drive_get_ref(DriveInfo *dinfo)
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{ |
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dinfo->refcount++; |
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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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|
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static int parse_block_error_action(const char *buf, bool is_read) |
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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_report("'%s' invalid %s error action",
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buf, is_read ? "read" : "write"); |
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return -1; |
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} |
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} |
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static bool 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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|
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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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static DriveInfo *blockdev_init(QemuOpts *all_opts,
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BlockInterfaceType block_default_type) |
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{ |
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const char *buf; |
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const char *file = NULL; |
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const char *serial; |
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const char *mediastr = ""; |
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BlockInterfaceType type; |
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enum { MEDIA_DISK, MEDIA_CDROM } media;
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int bus_id, unit_id;
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int cyls, heads, secs, translation;
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int max_devs;
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int index;
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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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const char *devaddr; |
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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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QDict *bs_opts; |
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const char *id; |
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bool has_driver_specific_opts;
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BlockDriver *drv = NULL;
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translation = BIOS_ATA_TRANSLATION_AUTO; |
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media = MEDIA_DISK; |
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/* Check common options by copying from all_opts to opts, all other options
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* are stored in bs_opts. */
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id = qemu_opts_id(all_opts); |
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opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
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if (error_is_set(&error)) {
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qerror_report_err(error); |
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error_free(error); |
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return NULL; |
339 |
} |
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|
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bs_opts = qdict_new(); |
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qemu_opts_to_qdict(all_opts, bs_opts); |
343 |
qemu_opts_absorb_qdict(opts, bs_opts, &error); |
344 |
if (error_is_set(&error)) {
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qerror_report_err(error); |
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error_free(error); |
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return NULL; |
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} |
349 |
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if (id) {
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qdict_del(bs_opts, "id");
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} |
353 |
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has_driver_specific_opts = !!qdict_size(bs_opts); |
355 |
|
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/* extract parameters */
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bus_id = qemu_opt_get_number(opts, "bus", 0); |
358 |
unit_id = qemu_opt_get_number(opts, "unit", -1); |
359 |
index = qemu_opt_get_number(opts, "index", -1); |
360 |
|
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cyls = qemu_opt_get_number(opts, "cyls", 0); |
362 |
heads = qemu_opt_get_number(opts, "heads", 0); |
363 |
secs = qemu_opt_get_number(opts, "secs", 0); |
364 |
|
365 |
snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
366 |
ro = qemu_opt_get_bool(opts, "read-only", 0); |
367 |
copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
368 |
|
369 |
file = qemu_opt_get(opts, "file");
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370 |
serial = qemu_opt_get(opts, "serial");
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371 |
|
372 |
if ((buf = qemu_opt_get(opts, "if")) != NULL) { |
373 |
for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
374 |
; |
375 |
if (type == IF_COUNT) {
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376 |
error_report("unsupported bus type '%s'", buf);
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377 |
return NULL; |
378 |
} |
379 |
} else {
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380 |
type = block_default_type; |
381 |
} |
382 |
|
383 |
max_devs = if_max_devs[type]; |
384 |
|
385 |
if (cyls || heads || secs) {
|
386 |
if (cyls < 1) { |
387 |
error_report("invalid physical cyls number");
|
388 |
return NULL; |
389 |
} |
390 |
if (heads < 1) { |
391 |
error_report("invalid physical heads number");
|
392 |
return NULL; |
393 |
} |
394 |
if (secs < 1) { |
395 |
error_report("invalid physical secs number");
|
396 |
return NULL; |
397 |
} |
398 |
} |
399 |
|
400 |
if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
401 |
if (!cyls) {
|
402 |
error_report("'%s' trans must be used with cyls, heads and secs",
|
403 |
buf); |
404 |
return NULL; |
405 |
} |
406 |
if (!strcmp(buf, "none")) |
407 |
translation = BIOS_ATA_TRANSLATION_NONE; |
408 |
else if (!strcmp(buf, "lba")) |
409 |
translation = BIOS_ATA_TRANSLATION_LBA; |
410 |
else if (!strcmp(buf, "auto")) |
411 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
412 |
else {
|
413 |
error_report("'%s' invalid translation type", buf);
|
414 |
return NULL; |
415 |
} |
416 |
} |
417 |
|
418 |
if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
419 |
if (!strcmp(buf, "disk")) { |
420 |
media = MEDIA_DISK; |
421 |
} else if (!strcmp(buf, "cdrom")) { |
422 |
if (cyls || secs || heads) {
|
423 |
error_report("CHS can't be set with media=%s", buf);
|
424 |
return NULL; |
425 |
} |
426 |
media = MEDIA_CDROM; |
427 |
} else {
|
428 |
error_report("'%s' invalid media", buf);
|
429 |
return NULL; |
430 |
} |
431 |
} |
432 |
|
433 |
if ((buf = qemu_opt_get(opts, "discard")) != NULL) { |
434 |
if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { |
435 |
error_report("invalid discard option");
|
436 |
return NULL; |
437 |
} |
438 |
} |
439 |
|
440 |
if (qemu_opt_get_bool(opts, "cache.writeback", true)) { |
441 |
bdrv_flags |= BDRV_O_CACHE_WB; |
442 |
} |
443 |
if (qemu_opt_get_bool(opts, "cache.direct", false)) { |
444 |
bdrv_flags |= BDRV_O_NOCACHE; |
445 |
} |
446 |
if (qemu_opt_get_bool(opts, "cache.no-flush", true)) { |
447 |
bdrv_flags |= BDRV_O_NO_FLUSH; |
448 |
} |
449 |
|
450 |
#ifdef CONFIG_LINUX_AIO
|
451 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
452 |
if (!strcmp(buf, "native")) { |
453 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
454 |
} else if (!strcmp(buf, "threads")) { |
455 |
/* this is the default */
|
456 |
} else {
|
457 |
error_report("invalid aio option");
|
458 |
return NULL; |
459 |
} |
460 |
} |
461 |
#endif
|
462 |
|
463 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
464 |
if (is_help_option(buf)) {
|
465 |
error_printf("Supported formats:");
|
466 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
467 |
error_printf("\n");
|
468 |
return NULL; |
469 |
} |
470 |
|
471 |
drv = bdrv_find_whitelisted_format(buf, ro); |
472 |
if (!drv) {
|
473 |
if (!ro && bdrv_find_whitelisted_format(buf, !ro)) {
|
474 |
error_report("'%s' can be only used as read-only device.", buf);
|
475 |
} else {
|
476 |
error_report("'%s' invalid format", buf);
|
477 |
} |
478 |
return NULL; |
479 |
} |
480 |
} |
481 |
|
482 |
/* disk I/O throttling */
|
483 |
memset(&cfg, 0, sizeof(cfg)); |
484 |
cfg.buckets[THROTTLE_BPS_TOTAL].avg = |
485 |
qemu_opt_get_number(opts, "throttling.bps-total", 0); |
486 |
cfg.buckets[THROTTLE_BPS_READ].avg = |
487 |
qemu_opt_get_number(opts, "throttling.bps-read", 0); |
488 |
cfg.buckets[THROTTLE_BPS_WRITE].avg = |
489 |
qemu_opt_get_number(opts, "throttling.bps-write", 0); |
490 |
cfg.buckets[THROTTLE_OPS_TOTAL].avg = |
491 |
qemu_opt_get_number(opts, "throttling.iops-total", 0); |
492 |
cfg.buckets[THROTTLE_OPS_READ].avg = |
493 |
qemu_opt_get_number(opts, "throttling.iops-read", 0); |
494 |
cfg.buckets[THROTTLE_OPS_WRITE].avg = |
495 |
qemu_opt_get_number(opts, "throttling.iops-write", 0); |
496 |
|
497 |
cfg.buckets[THROTTLE_BPS_TOTAL].max = |
498 |
qemu_opt_get_number(opts, "throttling.bps-total-max", 0); |
499 |
cfg.buckets[THROTTLE_BPS_READ].max = |
500 |
qemu_opt_get_number(opts, "throttling.bps-read-max", 0); |
501 |
cfg.buckets[THROTTLE_BPS_WRITE].max = |
502 |
qemu_opt_get_number(opts, "throttling.bps-write-max", 0); |
503 |
cfg.buckets[THROTTLE_OPS_TOTAL].max = |
504 |
qemu_opt_get_number(opts, "throttling.iops-total-max", 0); |
505 |
cfg.buckets[THROTTLE_OPS_READ].max = |
506 |
qemu_opt_get_number(opts, "throttling.iops-read-max", 0); |
507 |
cfg.buckets[THROTTLE_OPS_WRITE].max = |
508 |
qemu_opt_get_number(opts, "throttling.iops-write-max", 0); |
509 |
|
510 |
cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0); |
511 |
|
512 |
if (!check_throttle_config(&cfg, &error)) {
|
513 |
error_report("%s", error_get_pretty(error));
|
514 |
error_free(error); |
515 |
return NULL; |
516 |
} |
517 |
|
518 |
if (qemu_opt_get(opts, "boot") != NULL) { |
519 |
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
520 |
"ignored. Future versions will reject this parameter. Please "
|
521 |
"update your scripts.\n");
|
522 |
} |
523 |
|
524 |
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
525 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
526 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
527 |
error_report("werror is not supported by this bus type");
|
528 |
return NULL; |
529 |
} |
530 |
|
531 |
on_write_error = parse_block_error_action(buf, 0);
|
532 |
if (on_write_error < 0) { |
533 |
return NULL; |
534 |
} |
535 |
} |
536 |
|
537 |
on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
538 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
539 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
540 |
error_report("rerror is not supported by this bus type");
|
541 |
return NULL; |
542 |
} |
543 |
|
544 |
on_read_error = parse_block_error_action(buf, 1);
|
545 |
if (on_read_error < 0) { |
546 |
return NULL; |
547 |
} |
548 |
} |
549 |
|
550 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
551 |
if (type != IF_VIRTIO) {
|
552 |
error_report("addr is not supported by this bus type");
|
553 |
return NULL; |
554 |
} |
555 |
} |
556 |
|
557 |
/* compute bus and unit according index */
|
558 |
|
559 |
if (index != -1) { |
560 |
if (bus_id != 0 || unit_id != -1) { |
561 |
error_report("index cannot be used with bus and unit");
|
562 |
return NULL; |
563 |
} |
564 |
bus_id = drive_index_to_bus_id(type, index); |
565 |
unit_id = drive_index_to_unit_id(type, index); |
566 |
} |
567 |
|
568 |
/* if user doesn't specify a unit_id,
|
569 |
* try to find the first free
|
570 |
*/
|
571 |
|
572 |
if (unit_id == -1) { |
573 |
unit_id = 0;
|
574 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
575 |
unit_id++; |
576 |
if (max_devs && unit_id >= max_devs) {
|
577 |
unit_id -= max_devs; |
578 |
bus_id++; |
579 |
} |
580 |
} |
581 |
} |
582 |
|
583 |
/* check unit id */
|
584 |
|
585 |
if (max_devs && unit_id >= max_devs) {
|
586 |
error_report("unit %d too big (max is %d)",
|
587 |
unit_id, max_devs - 1);
|
588 |
return NULL; |
589 |
} |
590 |
|
591 |
/*
|
592 |
* catch multiple definitions
|
593 |
*/
|
594 |
|
595 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
596 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
597 |
bus_id, unit_id, index); |
598 |
return NULL; |
599 |
} |
600 |
|
601 |
/* init */
|
602 |
|
603 |
dinfo = g_malloc0(sizeof(*dinfo));
|
604 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
605 |
dinfo->id = g_strdup(buf); |
606 |
} else {
|
607 |
/* no id supplied -> create one */
|
608 |
dinfo->id = g_malloc0(32);
|
609 |
if (type == IF_IDE || type == IF_SCSI)
|
610 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
611 |
if (max_devs)
|
612 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
613 |
if_name[type], bus_id, mediastr, unit_id); |
614 |
else
|
615 |
snprintf(dinfo->id, 32, "%s%s%i", |
616 |
if_name[type], mediastr, unit_id); |
617 |
} |
618 |
dinfo->bdrv = bdrv_new(dinfo->id); |
619 |
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
620 |
dinfo->bdrv->read_only = ro; |
621 |
dinfo->devaddr = devaddr; |
622 |
dinfo->type = type; |
623 |
dinfo->bus = bus_id; |
624 |
dinfo->unit = unit_id; |
625 |
dinfo->cyls = cyls; |
626 |
dinfo->heads = heads; |
627 |
dinfo->secs = secs; |
628 |
dinfo->trans = translation; |
629 |
dinfo->opts = all_opts; |
630 |
dinfo->refcount = 1;
|
631 |
if (serial != NULL) { |
632 |
dinfo->serial = g_strdup(serial); |
633 |
} |
634 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
635 |
|
636 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
637 |
|
638 |
/* disk I/O throttling */
|
639 |
if (throttle_enabled(&cfg)) {
|
640 |
bdrv_io_limits_enable(dinfo->bdrv); |
641 |
bdrv_set_io_limits(dinfo->bdrv, &cfg); |
642 |
} |
643 |
|
644 |
switch(type) {
|
645 |
case IF_IDE:
|
646 |
case IF_SCSI:
|
647 |
case IF_XEN:
|
648 |
case IF_NONE:
|
649 |
dinfo->media_cd = media == MEDIA_CDROM; |
650 |
break;
|
651 |
case IF_SD:
|
652 |
case IF_FLOPPY:
|
653 |
case IF_PFLASH:
|
654 |
case IF_MTD:
|
655 |
break;
|
656 |
case IF_VIRTIO:
|
657 |
{ |
658 |
/* add virtio block device */
|
659 |
QemuOpts *devopts; |
660 |
devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
|
661 |
if (arch_type == QEMU_ARCH_S390X) {
|
662 |
qemu_opt_set(devopts, "driver", "virtio-blk-s390"); |
663 |
} else {
|
664 |
qemu_opt_set(devopts, "driver", "virtio-blk-pci"); |
665 |
} |
666 |
qemu_opt_set(devopts, "drive", dinfo->id);
|
667 |
if (devaddr)
|
668 |
qemu_opt_set(devopts, "addr", devaddr);
|
669 |
break;
|
670 |
} |
671 |
default:
|
672 |
abort(); |
673 |
} |
674 |
if (!file || !*file) {
|
675 |
if (has_driver_specific_opts) {
|
676 |
file = NULL;
|
677 |
} else {
|
678 |
return dinfo;
|
679 |
} |
680 |
} |
681 |
if (snapshot) {
|
682 |
/* always use cache=unsafe with snapshot */
|
683 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
684 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
685 |
} |
686 |
|
687 |
if (copy_on_read) {
|
688 |
bdrv_flags |= BDRV_O_COPY_ON_READ; |
689 |
} |
690 |
|
691 |
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
692 |
bdrv_flags |= BDRV_O_INCOMING; |
693 |
} |
694 |
|
695 |
if (media == MEDIA_CDROM) {
|
696 |
/* CDROM is fine for any interface, don't check. */
|
697 |
ro = 1;
|
698 |
} else if (ro == 1) { |
699 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
|
700 |
type != IF_NONE && type != IF_PFLASH) { |
701 |
error_report("read-only not supported by this bus type");
|
702 |
goto err;
|
703 |
} |
704 |
} |
705 |
|
706 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
707 |
|
708 |
if (ro && copy_on_read) {
|
709 |
error_report("warning: disabling copy_on_read on read-only drive");
|
710 |
} |
711 |
|
712 |
QINCREF(bs_opts); |
713 |
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error); |
714 |
|
715 |
if (ret < 0) { |
716 |
error_report("could not open disk image %s: %s",
|
717 |
file ?: dinfo->id, error_get_pretty(error)); |
718 |
goto err;
|
719 |
} |
720 |
|
721 |
if (bdrv_key_required(dinfo->bdrv))
|
722 |
autostart = 0;
|
723 |
|
724 |
QDECREF(bs_opts); |
725 |
qemu_opts_del(opts); |
726 |
|
727 |
return dinfo;
|
728 |
|
729 |
err:
|
730 |
qemu_opts_del(opts); |
731 |
QDECREF(bs_opts); |
732 |
bdrv_unref(dinfo->bdrv); |
733 |
g_free(dinfo->id); |
734 |
QTAILQ_REMOVE(&drives, dinfo, next); |
735 |
g_free(dinfo); |
736 |
return NULL; |
737 |
} |
738 |
|
739 |
static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to) |
740 |
{ |
741 |
const char *value; |
742 |
|
743 |
value = qemu_opt_get(opts, from); |
744 |
if (value) {
|
745 |
qemu_opt_set(opts, to, value); |
746 |
qemu_opt_unset(opts, from); |
747 |
} |
748 |
} |
749 |
|
750 |
DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) |
751 |
{ |
752 |
const char *value; |
753 |
|
754 |
/* Change legacy command line options into QMP ones */
|
755 |
qemu_opt_rename(all_opts, "iops", "throttling.iops-total"); |
756 |
qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read"); |
757 |
qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write"); |
758 |
|
759 |
qemu_opt_rename(all_opts, "bps", "throttling.bps-total"); |
760 |
qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read"); |
761 |
qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write"); |
762 |
|
763 |
qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max"); |
764 |
qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max"); |
765 |
qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max"); |
766 |
|
767 |
qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max"); |
768 |
qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max"); |
769 |
qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max"); |
770 |
|
771 |
qemu_opt_rename(all_opts, |
772 |
"iops_size", "throttling.iops-size"); |
773 |
|
774 |
qemu_opt_rename(all_opts, "readonly", "read-only"); |
775 |
|
776 |
value = qemu_opt_get(all_opts, "cache");
|
777 |
if (value) {
|
778 |
int flags = 0; |
779 |
|
780 |
if (bdrv_parse_cache_flags(value, &flags) != 0) { |
781 |
error_report("invalid cache option");
|
782 |
return NULL; |
783 |
} |
784 |
|
785 |
/* Specific options take precedence */
|
786 |
if (!qemu_opt_get(all_opts, "cache.writeback")) { |
787 |
qemu_opt_set_bool(all_opts, "cache.writeback",
|
788 |
!!(flags & BDRV_O_CACHE_WB)); |
789 |
} |
790 |
if (!qemu_opt_get(all_opts, "cache.direct")) { |
791 |
qemu_opt_set_bool(all_opts, "cache.direct",
|
792 |
!!(flags & BDRV_O_NOCACHE)); |
793 |
} |
794 |
if (!qemu_opt_get(all_opts, "cache.no-flush")) { |
795 |
qemu_opt_set_bool(all_opts, "cache.no-flush",
|
796 |
!!(flags & BDRV_O_NO_FLUSH)); |
797 |
} |
798 |
qemu_opt_unset(all_opts, "cache");
|
799 |
} |
800 |
|
801 |
return blockdev_init(all_opts, block_default_type);
|
802 |
} |
803 |
|
804 |
void do_commit(Monitor *mon, const QDict *qdict) |
805 |
{ |
806 |
const char *device = qdict_get_str(qdict, "device"); |
807 |
BlockDriverState *bs; |
808 |
int ret;
|
809 |
|
810 |
if (!strcmp(device, "all")) { |
811 |
ret = bdrv_commit_all(); |
812 |
} else {
|
813 |
bs = bdrv_find(device); |
814 |
if (!bs) {
|
815 |
monitor_printf(mon, "Device '%s' not found\n", device);
|
816 |
return;
|
817 |
} |
818 |
ret = bdrv_commit(bs); |
819 |
} |
820 |
if (ret < 0) { |
821 |
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
|
822 |
strerror(-ret)); |
823 |
} |
824 |
} |
825 |
|
826 |
static void blockdev_do_action(int kind, void *data, Error **errp) |
827 |
{ |
828 |
TransactionAction action; |
829 |
TransactionActionList list; |
830 |
|
831 |
action.kind = kind; |
832 |
action.data = data; |
833 |
list.value = &action; |
834 |
list.next = NULL;
|
835 |
qmp_transaction(&list, errp); |
836 |
} |
837 |
|
838 |
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
839 |
bool has_format, const char *format, |
840 |
bool has_mode, enum NewImageMode mode, |
841 |
Error **errp) |
842 |
{ |
843 |
BlockdevSnapshot snapshot = { |
844 |
.device = (char *) device,
|
845 |
.snapshot_file = (char *) snapshot_file,
|
846 |
.has_format = has_format, |
847 |
.format = (char *) format,
|
848 |
.has_mode = has_mode, |
849 |
.mode = mode, |
850 |
}; |
851 |
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
852 |
&snapshot, errp); |
853 |
} |
854 |
|
855 |
void qmp_blockdev_snapshot_internal_sync(const char *device, |
856 |
const char *name, |
857 |
Error **errp) |
858 |
{ |
859 |
BlockdevSnapshotInternal snapshot = { |
860 |
.device = (char *) device,
|
861 |
.name = (char *) name
|
862 |
}; |
863 |
|
864 |
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, |
865 |
&snapshot, errp); |
866 |
} |
867 |
|
868 |
SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
869 |
bool has_id,
|
870 |
const char *id, |
871 |
bool has_name,
|
872 |
const char *name, |
873 |
Error **errp) |
874 |
{ |
875 |
BlockDriverState *bs = bdrv_find(device); |
876 |
QEMUSnapshotInfo sn; |
877 |
Error *local_err = NULL;
|
878 |
SnapshotInfo *info = NULL;
|
879 |
int ret;
|
880 |
|
881 |
if (!bs) {
|
882 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
883 |
return NULL; |
884 |
} |
885 |
|
886 |
if (!has_id) {
|
887 |
id = NULL;
|
888 |
} |
889 |
|
890 |
if (!has_name) {
|
891 |
name = NULL;
|
892 |
} |
893 |
|
894 |
if (!id && !name) {
|
895 |
error_setg(errp, "Name or id must be provided");
|
896 |
return NULL; |
897 |
} |
898 |
|
899 |
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); |
900 |
if (error_is_set(&local_err)) {
|
901 |
error_propagate(errp, local_err); |
902 |
return NULL; |
903 |
} |
904 |
if (!ret) {
|
905 |
error_setg(errp, |
906 |
"Snapshot with id '%s' and name '%s' does not exist on "
|
907 |
"device '%s'",
|
908 |
STR_OR_NULL(id), STR_OR_NULL(name), device); |
909 |
return NULL; |
910 |
} |
911 |
|
912 |
bdrv_snapshot_delete(bs, id, name, &local_err); |
913 |
if (error_is_set(&local_err)) {
|
914 |
error_propagate(errp, local_err); |
915 |
return NULL; |
916 |
} |
917 |
|
918 |
info = g_malloc0(sizeof(SnapshotInfo));
|
919 |
info->id = g_strdup(sn.id_str); |
920 |
info->name = g_strdup(sn.name); |
921 |
info->date_nsec = sn.date_nsec; |
922 |
info->date_sec = sn.date_sec; |
923 |
info->vm_state_size = sn.vm_state_size; |
924 |
info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
|
925 |
info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
|
926 |
|
927 |
return info;
|
928 |
} |
929 |
|
930 |
/* New and old BlockDriverState structs for group snapshots */
|
931 |
|
932 |
typedef struct BlkTransactionState BlkTransactionState; |
933 |
|
934 |
/* Only prepare() may fail. In a single transaction, only one of commit() or
|
935 |
abort() will be called, clean() will always be called if it present. */
|
936 |
typedef struct BdrvActionOps { |
937 |
/* Size of state struct, in bytes. */
|
938 |
size_t instance_size; |
939 |
/* Prepare the work, must NOT be NULL. */
|
940 |
void (*prepare)(BlkTransactionState *common, Error **errp);
|
941 |
/* Commit the changes, can be NULL. */
|
942 |
void (*commit)(BlkTransactionState *common);
|
943 |
/* Abort the changes on fail, can be NULL. */
|
944 |
void (*abort)(BlkTransactionState *common);
|
945 |
/* Clean up resource in the end, can be NULL. */
|
946 |
void (*clean)(BlkTransactionState *common);
|
947 |
} BdrvActionOps; |
948 |
|
949 |
/*
|
950 |
* This structure must be arranged as first member in child type, assuming
|
951 |
* that compiler will also arrange it to the same address with parent instance.
|
952 |
* Later it will be used in free().
|
953 |
*/
|
954 |
struct BlkTransactionState {
|
955 |
TransactionAction *action; |
956 |
const BdrvActionOps *ops;
|
957 |
QSIMPLEQ_ENTRY(BlkTransactionState) entry; |
958 |
}; |
959 |
|
960 |
/* internal snapshot private data */
|
961 |
typedef struct InternalSnapshotState { |
962 |
BlkTransactionState common; |
963 |
BlockDriverState *bs; |
964 |
QEMUSnapshotInfo sn; |
965 |
} InternalSnapshotState; |
966 |
|
967 |
static void internal_snapshot_prepare(BlkTransactionState *common, |
968 |
Error **errp) |
969 |
{ |
970 |
const char *device; |
971 |
const char *name; |
972 |
BlockDriverState *bs; |
973 |
QEMUSnapshotInfo old_sn, *sn; |
974 |
bool ret;
|
975 |
qemu_timeval tv; |
976 |
BlockdevSnapshotInternal *internal; |
977 |
InternalSnapshotState *state; |
978 |
int ret1;
|
979 |
|
980 |
g_assert(common->action->kind == |
981 |
TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); |
982 |
internal = common->action->blockdev_snapshot_internal_sync; |
983 |
state = DO_UPCAST(InternalSnapshotState, common, common); |
984 |
|
985 |
/* 1. parse input */
|
986 |
device = internal->device; |
987 |
name = internal->name; |
988 |
|
989 |
/* 2. check for validation */
|
990 |
bs = bdrv_find(device); |
991 |
if (!bs) {
|
992 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
993 |
return;
|
994 |
} |
995 |
|
996 |
if (!bdrv_is_inserted(bs)) {
|
997 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
998 |
return;
|
999 |
} |
1000 |
|
1001 |
if (bdrv_is_read_only(bs)) {
|
1002 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
1003 |
return;
|
1004 |
} |
1005 |
|
1006 |
if (!bdrv_can_snapshot(bs)) {
|
1007 |
error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, |
1008 |
bs->drv->format_name, device, "internal snapshot");
|
1009 |
return;
|
1010 |
} |
1011 |
|
1012 |
if (!strlen(name)) {
|
1013 |
error_setg(errp, "Name is empty");
|
1014 |
return;
|
1015 |
} |
1016 |
|
1017 |
/* check whether a snapshot with name exist */
|
1018 |
ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, errp);
|
1019 |
if (error_is_set(errp)) {
|
1020 |
return;
|
1021 |
} else if (ret) { |
1022 |
error_setg(errp, |
1023 |
"Snapshot with name '%s' already exists on device '%s'",
|
1024 |
name, device); |
1025 |
return;
|
1026 |
} |
1027 |
|
1028 |
/* 3. take the snapshot */
|
1029 |
sn = &state->sn; |
1030 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1031 |
qemu_gettimeofday(&tv); |
1032 |
sn->date_sec = tv.tv_sec; |
1033 |
sn->date_nsec = tv.tv_usec * 1000;
|
1034 |
sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
1035 |
|
1036 |
ret1 = bdrv_snapshot_create(bs, sn); |
1037 |
if (ret1 < 0) { |
1038 |
error_setg_errno(errp, -ret1, |
1039 |
"Failed to create snapshot '%s' on device '%s'",
|
1040 |
name, device); |
1041 |
return;
|
1042 |
} |
1043 |
|
1044 |
/* 4. succeed, mark a snapshot is created */
|
1045 |
state->bs = bs; |
1046 |
} |
1047 |
|
1048 |
static void internal_snapshot_abort(BlkTransactionState *common) |
1049 |
{ |
1050 |
InternalSnapshotState *state = |
1051 |
DO_UPCAST(InternalSnapshotState, common, common); |
1052 |
BlockDriverState *bs = state->bs; |
1053 |
QEMUSnapshotInfo *sn = &state->sn; |
1054 |
Error *local_error = NULL;
|
1055 |
|
1056 |
if (!bs) {
|
1057 |
return;
|
1058 |
} |
1059 |
|
1060 |
if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { |
1061 |
error_report("Failed to delete snapshot with id '%s' and name '%s' on "
|
1062 |
"device '%s' in abort: %s",
|
1063 |
sn->id_str, |
1064 |
sn->name, |
1065 |
bdrv_get_device_name(bs), |
1066 |
error_get_pretty(local_error)); |
1067 |
error_free(local_error); |
1068 |
} |
1069 |
} |
1070 |
|
1071 |
/* external snapshot private data */
|
1072 |
typedef struct ExternalSnapshotState { |
1073 |
BlkTransactionState common; |
1074 |
BlockDriverState *old_bs; |
1075 |
BlockDriverState *new_bs; |
1076 |
} ExternalSnapshotState; |
1077 |
|
1078 |
static void external_snapshot_prepare(BlkTransactionState *common, |
1079 |
Error **errp) |
1080 |
{ |
1081 |
BlockDriver *drv; |
1082 |
int flags, ret;
|
1083 |
Error *local_err = NULL;
|
1084 |
const char *device; |
1085 |
const char *new_image_file; |
1086 |
const char *format = "qcow2"; |
1087 |
enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
1088 |
ExternalSnapshotState *state = |
1089 |
DO_UPCAST(ExternalSnapshotState, common, common); |
1090 |
TransactionAction *action = common->action; |
1091 |
|
1092 |
/* get parameters */
|
1093 |
g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); |
1094 |
|
1095 |
device = action->blockdev_snapshot_sync->device; |
1096 |
new_image_file = action->blockdev_snapshot_sync->snapshot_file; |
1097 |
if (action->blockdev_snapshot_sync->has_format) {
|
1098 |
format = action->blockdev_snapshot_sync->format; |
1099 |
} |
1100 |
if (action->blockdev_snapshot_sync->has_mode) {
|
1101 |
mode = action->blockdev_snapshot_sync->mode; |
1102 |
} |
1103 |
|
1104 |
/* start processing */
|
1105 |
drv = bdrv_find_format(format); |
1106 |
if (!drv) {
|
1107 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1108 |
return;
|
1109 |
} |
1110 |
|
1111 |
state->old_bs = bdrv_find(device); |
1112 |
if (!state->old_bs) {
|
1113 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1114 |
return;
|
1115 |
} |
1116 |
|
1117 |
if (!bdrv_is_inserted(state->old_bs)) {
|
1118 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1119 |
return;
|
1120 |
} |
1121 |
|
1122 |
if (bdrv_in_use(state->old_bs)) {
|
1123 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1124 |
return;
|
1125 |
} |
1126 |
|
1127 |
if (!bdrv_is_read_only(state->old_bs)) {
|
1128 |
if (bdrv_flush(state->old_bs)) {
|
1129 |
error_set(errp, QERR_IO_ERROR); |
1130 |
return;
|
1131 |
} |
1132 |
} |
1133 |
|
1134 |
flags = state->old_bs->open_flags; |
1135 |
|
1136 |
/* create new image w/backing file */
|
1137 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
1138 |
bdrv_img_create(new_image_file, format, |
1139 |
state->old_bs->filename, |
1140 |
state->old_bs->drv->format_name, |
1141 |
NULL, -1, flags, &local_err, false); |
1142 |
if (error_is_set(&local_err)) {
|
1143 |
error_propagate(errp, local_err); |
1144 |
return;
|
1145 |
} |
1146 |
} |
1147 |
|
1148 |
/* We will manually add the backing_hd field to the bs later */
|
1149 |
state->new_bs = bdrv_new("");
|
1150 |
/* TODO Inherit bs->options or only take explicit options with an
|
1151 |
* extended QMP command? */
|
1152 |
ret = bdrv_open(state->new_bs, new_image_file, NULL,
|
1153 |
flags | BDRV_O_NO_BACKING, drv, &local_err); |
1154 |
if (ret != 0) { |
1155 |
error_propagate(errp, local_err); |
1156 |
} |
1157 |
} |
1158 |
|
1159 |
static void external_snapshot_commit(BlkTransactionState *common) |
1160 |
{ |
1161 |
ExternalSnapshotState *state = |
1162 |
DO_UPCAST(ExternalSnapshotState, common, common); |
1163 |
|
1164 |
/* This removes our old bs and adds the new bs */
|
1165 |
bdrv_append(state->new_bs, state->old_bs); |
1166 |
/* We don't need (or want) to use the transactional
|
1167 |
* bdrv_reopen_multiple() across all the entries at once, because we
|
1168 |
* don't want to abort all of them if one of them fails the reopen */
|
1169 |
bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, |
1170 |
NULL);
|
1171 |
} |
1172 |
|
1173 |
static void external_snapshot_abort(BlkTransactionState *common) |
1174 |
{ |
1175 |
ExternalSnapshotState *state = |
1176 |
DO_UPCAST(ExternalSnapshotState, common, common); |
1177 |
if (state->new_bs) {
|
1178 |
bdrv_unref(state->new_bs); |
1179 |
} |
1180 |
} |
1181 |
|
1182 |
typedef struct DriveBackupState { |
1183 |
BlkTransactionState common; |
1184 |
BlockDriverState *bs; |
1185 |
BlockJob *job; |
1186 |
} DriveBackupState; |
1187 |
|
1188 |
static void drive_backup_prepare(BlkTransactionState *common, Error **errp) |
1189 |
{ |
1190 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1191 |
DriveBackup *backup; |
1192 |
Error *local_err = NULL;
|
1193 |
|
1194 |
assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
1195 |
backup = common->action->drive_backup; |
1196 |
|
1197 |
qmp_drive_backup(backup->device, backup->target, |
1198 |
backup->has_format, backup->format, |
1199 |
backup->sync, |
1200 |
backup->has_mode, backup->mode, |
1201 |
backup->has_speed, backup->speed, |
1202 |
backup->has_on_source_error, backup->on_source_error, |
1203 |
backup->has_on_target_error, backup->on_target_error, |
1204 |
&local_err); |
1205 |
if (error_is_set(&local_err)) {
|
1206 |
error_propagate(errp, local_err); |
1207 |
state->bs = NULL;
|
1208 |
state->job = NULL;
|
1209 |
return;
|
1210 |
} |
1211 |
|
1212 |
state->bs = bdrv_find(backup->device); |
1213 |
state->job = state->bs->job; |
1214 |
} |
1215 |
|
1216 |
static void drive_backup_abort(BlkTransactionState *common) |
1217 |
{ |
1218 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1219 |
BlockDriverState *bs = state->bs; |
1220 |
|
1221 |
/* Only cancel if it's the job we started */
|
1222 |
if (bs && bs->job && bs->job == state->job) {
|
1223 |
block_job_cancel_sync(bs->job); |
1224 |
} |
1225 |
} |
1226 |
|
1227 |
static void abort_prepare(BlkTransactionState *common, Error **errp) |
1228 |
{ |
1229 |
error_setg(errp, "Transaction aborted using Abort action");
|
1230 |
} |
1231 |
|
1232 |
static void abort_commit(BlkTransactionState *common) |
1233 |
{ |
1234 |
g_assert_not_reached(); /* this action never succeeds */
|
1235 |
} |
1236 |
|
1237 |
static const BdrvActionOps actions[] = { |
1238 |
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
1239 |
.instance_size = sizeof(ExternalSnapshotState),
|
1240 |
.prepare = external_snapshot_prepare, |
1241 |
.commit = external_snapshot_commit, |
1242 |
.abort = external_snapshot_abort, |
1243 |
}, |
1244 |
[TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
1245 |
.instance_size = sizeof(DriveBackupState),
|
1246 |
.prepare = drive_backup_prepare, |
1247 |
.abort = drive_backup_abort, |
1248 |
}, |
1249 |
[TRANSACTION_ACTION_KIND_ABORT] = { |
1250 |
.instance_size = sizeof(BlkTransactionState),
|
1251 |
.prepare = abort_prepare, |
1252 |
.commit = abort_commit, |
1253 |
}, |
1254 |
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
1255 |
.instance_size = sizeof(InternalSnapshotState),
|
1256 |
.prepare = internal_snapshot_prepare, |
1257 |
.abort = internal_snapshot_abort, |
1258 |
}, |
1259 |
}; |
1260 |
|
1261 |
/*
|
1262 |
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
1263 |
* then we do not pivot any of the devices in the group, and abandon the
|
1264 |
* snapshots
|
1265 |
*/
|
1266 |
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
|
1267 |
{ |
1268 |
TransactionActionList *dev_entry = dev_list; |
1269 |
BlkTransactionState *state, *next; |
1270 |
Error *local_err = NULL;
|
1271 |
|
1272 |
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; |
1273 |
QSIMPLEQ_INIT(&snap_bdrv_states); |
1274 |
|
1275 |
/* drain all i/o before any snapshots */
|
1276 |
bdrv_drain_all(); |
1277 |
|
1278 |
/* We don't do anything in this loop that commits us to the snapshot */
|
1279 |
while (NULL != dev_entry) { |
1280 |
TransactionAction *dev_info = NULL;
|
1281 |
const BdrvActionOps *ops;
|
1282 |
|
1283 |
dev_info = dev_entry->value; |
1284 |
dev_entry = dev_entry->next; |
1285 |
|
1286 |
assert(dev_info->kind < ARRAY_SIZE(actions)); |
1287 |
|
1288 |
ops = &actions[dev_info->kind]; |
1289 |
state = g_malloc0(ops->instance_size); |
1290 |
state->ops = ops; |
1291 |
state->action = dev_info; |
1292 |
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
1293 |
|
1294 |
state->ops->prepare(state, &local_err); |
1295 |
if (error_is_set(&local_err)) {
|
1296 |
error_propagate(errp, local_err); |
1297 |
goto delete_and_fail;
|
1298 |
} |
1299 |
} |
1300 |
|
1301 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1302 |
if (state->ops->commit) {
|
1303 |
state->ops->commit(state); |
1304 |
} |
1305 |
} |
1306 |
|
1307 |
/* success */
|
1308 |
goto exit;
|
1309 |
|
1310 |
delete_and_fail:
|
1311 |
/*
|
1312 |
* failure, and it is all-or-none; abandon each new bs, and keep using
|
1313 |
* the original bs for all images
|
1314 |
*/
|
1315 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1316 |
if (state->ops->abort) {
|
1317 |
state->ops->abort(state); |
1318 |
} |
1319 |
} |
1320 |
exit:
|
1321 |
QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
1322 |
if (state->ops->clean) {
|
1323 |
state->ops->clean(state); |
1324 |
} |
1325 |
g_free(state); |
1326 |
} |
1327 |
} |
1328 |
|
1329 |
|
1330 |
static void eject_device(BlockDriverState *bs, int force, Error **errp) |
1331 |
{ |
1332 |
if (bdrv_in_use(bs)) {
|
1333 |
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
1334 |
return;
|
1335 |
} |
1336 |
if (!bdrv_dev_has_removable_media(bs)) {
|
1337 |
error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
1338 |
return;
|
1339 |
} |
1340 |
|
1341 |
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
1342 |
bdrv_dev_eject_request(bs, force); |
1343 |
if (!force) {
|
1344 |
error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
1345 |
return;
|
1346 |
} |
1347 |
} |
1348 |
|
1349 |
bdrv_close(bs); |
1350 |
} |
1351 |
|
1352 |
void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
1353 |
{ |
1354 |
BlockDriverState *bs; |
1355 |
|
1356 |
bs = bdrv_find(device); |
1357 |
if (!bs) {
|
1358 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1359 |
return;
|
1360 |
} |
1361 |
|
1362 |
eject_device(bs, force, errp); |
1363 |
} |
1364 |
|
1365 |
void qmp_block_passwd(const char *device, const char *password, Error **errp) |
1366 |
{ |
1367 |
BlockDriverState *bs; |
1368 |
int err;
|
1369 |
|
1370 |
bs = bdrv_find(device); |
1371 |
if (!bs) {
|
1372 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1373 |
return;
|
1374 |
} |
1375 |
|
1376 |
err = bdrv_set_key(bs, password); |
1377 |
if (err == -EINVAL) {
|
1378 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1379 |
return;
|
1380 |
} else if (err < 0) { |
1381 |
error_set(errp, QERR_INVALID_PASSWORD); |
1382 |
return;
|
1383 |
} |
1384 |
} |
1385 |
|
1386 |
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
1387 |
int bdrv_flags, BlockDriver *drv,
|
1388 |
const char *password, Error **errp) |
1389 |
{ |
1390 |
Error *local_err = NULL;
|
1391 |
int ret;
|
1392 |
|
1393 |
ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv, &local_err);
|
1394 |
if (ret < 0) { |
1395 |
error_propagate(errp, local_err); |
1396 |
return;
|
1397 |
} |
1398 |
|
1399 |
if (bdrv_key_required(bs)) {
|
1400 |
if (password) {
|
1401 |
if (bdrv_set_key(bs, password) < 0) { |
1402 |
error_set(errp, QERR_INVALID_PASSWORD); |
1403 |
} |
1404 |
} else {
|
1405 |
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), |
1406 |
bdrv_get_encrypted_filename(bs)); |
1407 |
} |
1408 |
} else if (password) { |
1409 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1410 |
} |
1411 |
} |
1412 |
|
1413 |
void qmp_change_blockdev(const char *device, const char *filename, |
1414 |
bool has_format, const char *format, Error **errp) |
1415 |
{ |
1416 |
BlockDriverState *bs; |
1417 |
BlockDriver *drv = NULL;
|
1418 |
int bdrv_flags;
|
1419 |
Error *err = NULL;
|
1420 |
|
1421 |
bs = bdrv_find(device); |
1422 |
if (!bs) {
|
1423 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1424 |
return;
|
1425 |
} |
1426 |
|
1427 |
if (format) {
|
1428 |
drv = bdrv_find_whitelisted_format(format, bs->read_only); |
1429 |
if (!drv) {
|
1430 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1431 |
return;
|
1432 |
} |
1433 |
} |
1434 |
|
1435 |
eject_device(bs, 0, &err);
|
1436 |
if (error_is_set(&err)) {
|
1437 |
error_propagate(errp, err); |
1438 |
return;
|
1439 |
} |
1440 |
|
1441 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
1442 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
1443 |
|
1444 |
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
1445 |
} |
1446 |
|
1447 |
/* throttling disk I/O limits */
|
1448 |
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
1449 |
int64_t bps_wr, |
1450 |
int64_t iops, |
1451 |
int64_t iops_rd, |
1452 |
int64_t iops_wr, |
1453 |
bool has_bps_max,
|
1454 |
int64_t bps_max, |
1455 |
bool has_bps_rd_max,
|
1456 |
int64_t bps_rd_max, |
1457 |
bool has_bps_wr_max,
|
1458 |
int64_t bps_wr_max, |
1459 |
bool has_iops_max,
|
1460 |
int64_t iops_max, |
1461 |
bool has_iops_rd_max,
|
1462 |
int64_t iops_rd_max, |
1463 |
bool has_iops_wr_max,
|
1464 |
int64_t iops_wr_max, |
1465 |
bool has_iops_size,
|
1466 |
int64_t iops_size, Error **errp) |
1467 |
{ |
1468 |
ThrottleConfig cfg; |
1469 |
BlockDriverState *bs; |
1470 |
|
1471 |
bs = bdrv_find(device); |
1472 |
if (!bs) {
|
1473 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1474 |
return;
|
1475 |
} |
1476 |
|
1477 |
memset(&cfg, 0, sizeof(cfg)); |
1478 |
cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps; |
1479 |
cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd; |
1480 |
cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr; |
1481 |
|
1482 |
cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops; |
1483 |
cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd; |
1484 |
cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr; |
1485 |
|
1486 |
if (has_bps_max) {
|
1487 |
cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max; |
1488 |
} |
1489 |
if (has_bps_rd_max) {
|
1490 |
cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max; |
1491 |
} |
1492 |
if (has_bps_wr_max) {
|
1493 |
cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max; |
1494 |
} |
1495 |
if (has_iops_max) {
|
1496 |
cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max; |
1497 |
} |
1498 |
if (has_iops_rd_max) {
|
1499 |
cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max; |
1500 |
} |
1501 |
if (has_iops_wr_max) {
|
1502 |
cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max; |
1503 |
} |
1504 |
|
1505 |
if (has_iops_size) {
|
1506 |
cfg.op_size = iops_size; |
1507 |
} |
1508 |
|
1509 |
if (!check_throttle_config(&cfg, errp)) {
|
1510 |
return;
|
1511 |
} |
1512 |
|
1513 |
if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
|
1514 |
bdrv_io_limits_enable(bs); |
1515 |
} else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) { |
1516 |
bdrv_io_limits_disable(bs); |
1517 |
} |
1518 |
|
1519 |
if (bs->io_limits_enabled) {
|
1520 |
bdrv_set_io_limits(bs, &cfg); |
1521 |
} |
1522 |
} |
1523 |
|
1524 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
1525 |
{ |
1526 |
const char *id = qdict_get_str(qdict, "id"); |
1527 |
BlockDriverState *bs; |
1528 |
|
1529 |
bs = bdrv_find(id); |
1530 |
if (!bs) {
|
1531 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
1532 |
return -1; |
1533 |
} |
1534 |
if (bdrv_in_use(bs)) {
|
1535 |
qerror_report(QERR_DEVICE_IN_USE, id); |
1536 |
return -1; |
1537 |
} |
1538 |
|
1539 |
/* quiesce block driver; prevent further io */
|
1540 |
bdrv_drain_all(); |
1541 |
bdrv_flush(bs); |
1542 |
bdrv_close(bs); |
1543 |
|
1544 |
/* if we have a device attached to this BlockDriverState
|
1545 |
* then we need to make the drive anonymous until the device
|
1546 |
* can be removed. If this is a drive with no device backing
|
1547 |
* then we can just get rid of the block driver state right here.
|
1548 |
*/
|
1549 |
if (bdrv_get_attached_dev(bs)) {
|
1550 |
bdrv_make_anon(bs); |
1551 |
|
1552 |
/* Further I/O must not pause the guest */
|
1553 |
bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, |
1554 |
BLOCKDEV_ON_ERROR_REPORT); |
1555 |
} else {
|
1556 |
drive_uninit(drive_get_by_blockdev(bs)); |
1557 |
} |
1558 |
|
1559 |
return 0; |
1560 |
} |
1561 |
|
1562 |
void qmp_block_resize(const char *device, int64_t size, Error **errp) |
1563 |
{ |
1564 |
BlockDriverState *bs; |
1565 |
int ret;
|
1566 |
|
1567 |
bs = bdrv_find(device); |
1568 |
if (!bs) {
|
1569 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1570 |
return;
|
1571 |
} |
1572 |
|
1573 |
if (size < 0) { |
1574 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
1575 |
return;
|
1576 |
} |
1577 |
|
1578 |
/* complete all in-flight operations before resizing the device */
|
1579 |
bdrv_drain_all(); |
1580 |
|
1581 |
ret = bdrv_truncate(bs, size); |
1582 |
switch (ret) {
|
1583 |
case 0: |
1584 |
break;
|
1585 |
case -ENOMEDIUM:
|
1586 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1587 |
break;
|
1588 |
case -ENOTSUP:
|
1589 |
error_set(errp, QERR_UNSUPPORTED); |
1590 |
break;
|
1591 |
case -EACCES:
|
1592 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
1593 |
break;
|
1594 |
case -EBUSY:
|
1595 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1596 |
break;
|
1597 |
default:
|
1598 |
error_setg_errno(errp, -ret, "Could not resize");
|
1599 |
break;
|
1600 |
} |
1601 |
} |
1602 |
|
1603 |
static void block_job_cb(void *opaque, int ret) |
1604 |
{ |
1605 |
BlockDriverState *bs = opaque; |
1606 |
QObject *obj; |
1607 |
|
1608 |
trace_block_job_cb(bs, bs->job, ret); |
1609 |
|
1610 |
assert(bs->job); |
1611 |
obj = qobject_from_block_job(bs->job); |
1612 |
if (ret < 0) { |
1613 |
QDict *dict = qobject_to_qdict(obj); |
1614 |
qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
|
1615 |
} |
1616 |
|
1617 |
if (block_job_is_cancelled(bs->job)) {
|
1618 |
monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); |
1619 |
} else {
|
1620 |
monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); |
1621 |
} |
1622 |
qobject_decref(obj); |
1623 |
|
1624 |
bdrv_put_ref_bh_schedule(bs); |
1625 |
} |
1626 |
|
1627 |
void qmp_block_stream(const char *device, bool has_base, |
1628 |
const char *base, bool has_speed, int64_t speed, |
1629 |
bool has_on_error, BlockdevOnError on_error,
|
1630 |
Error **errp) |
1631 |
{ |
1632 |
BlockDriverState *bs; |
1633 |
BlockDriverState *base_bs = NULL;
|
1634 |
Error *local_err = NULL;
|
1635 |
|
1636 |
if (!has_on_error) {
|
1637 |
on_error = BLOCKDEV_ON_ERROR_REPORT; |
1638 |
} |
1639 |
|
1640 |
bs = bdrv_find(device); |
1641 |
if (!bs) {
|
1642 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1643 |
return;
|
1644 |
} |
1645 |
|
1646 |
if (base) {
|
1647 |
base_bs = bdrv_find_backing_image(bs, base); |
1648 |
if (base_bs == NULL) { |
1649 |
error_set(errp, QERR_BASE_NOT_FOUND, base); |
1650 |
return;
|
1651 |
} |
1652 |
} |
1653 |
|
1654 |
stream_start(bs, base_bs, base, has_speed ? speed : 0,
|
1655 |
on_error, block_job_cb, bs, &local_err); |
1656 |
if (error_is_set(&local_err)) {
|
1657 |
error_propagate(errp, local_err); |
1658 |
return;
|
1659 |
} |
1660 |
|
1661 |
trace_qmp_block_stream(bs, bs->job); |
1662 |
} |
1663 |
|
1664 |
void qmp_block_commit(const char *device, |
1665 |
bool has_base, const char *base, const char *top, |
1666 |
bool has_speed, int64_t speed,
|
1667 |
Error **errp) |
1668 |
{ |
1669 |
BlockDriverState *bs; |
1670 |
BlockDriverState *base_bs, *top_bs; |
1671 |
Error *local_err = NULL;
|
1672 |
/* This will be part of the QMP command, if/when the
|
1673 |
* BlockdevOnError change for blkmirror makes it in
|
1674 |
*/
|
1675 |
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
1676 |
|
1677 |
/* drain all i/o before commits */
|
1678 |
bdrv_drain_all(); |
1679 |
|
1680 |
bs = bdrv_find(device); |
1681 |
if (!bs) {
|
1682 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1683 |
return;
|
1684 |
} |
1685 |
|
1686 |
/* default top_bs is the active layer */
|
1687 |
top_bs = bs; |
1688 |
|
1689 |
if (top) {
|
1690 |
if (strcmp(bs->filename, top) != 0) { |
1691 |
top_bs = bdrv_find_backing_image(bs, top); |
1692 |
} |
1693 |
} |
1694 |
|
1695 |
if (top_bs == NULL) { |
1696 |
error_setg(errp, "Top image file %s not found", top ? top : "NULL"); |
1697 |
return;
|
1698 |
} |
1699 |
|
1700 |
if (has_base && base) {
|
1701 |
base_bs = bdrv_find_backing_image(top_bs, base); |
1702 |
} else {
|
1703 |
base_bs = bdrv_find_base(top_bs); |
1704 |
} |
1705 |
|
1706 |
if (base_bs == NULL) { |
1707 |
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
1708 |
return;
|
1709 |
} |
1710 |
|
1711 |
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, |
1712 |
&local_err); |
1713 |
if (local_err != NULL) { |
1714 |
error_propagate(errp, local_err); |
1715 |
return;
|
1716 |
} |
1717 |
} |
1718 |
|
1719 |
void qmp_drive_backup(const char *device, const char *target, |
1720 |
bool has_format, const char *format, |
1721 |
enum MirrorSyncMode sync,
|
1722 |
bool has_mode, enum NewImageMode mode, |
1723 |
bool has_speed, int64_t speed,
|
1724 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1725 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1726 |
Error **errp) |
1727 |
{ |
1728 |
BlockDriverState *bs; |
1729 |
BlockDriverState *target_bs; |
1730 |
BlockDriverState *source = NULL;
|
1731 |
BlockDriver *drv = NULL;
|
1732 |
Error *local_err = NULL;
|
1733 |
int flags;
|
1734 |
int64_t size; |
1735 |
int ret;
|
1736 |
|
1737 |
if (!has_speed) {
|
1738 |
speed = 0;
|
1739 |
} |
1740 |
if (!has_on_source_error) {
|
1741 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1742 |
} |
1743 |
if (!has_on_target_error) {
|
1744 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1745 |
} |
1746 |
if (!has_mode) {
|
1747 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1748 |
} |
1749 |
|
1750 |
bs = bdrv_find(device); |
1751 |
if (!bs) {
|
1752 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1753 |
return;
|
1754 |
} |
1755 |
|
1756 |
if (!bdrv_is_inserted(bs)) {
|
1757 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1758 |
return;
|
1759 |
} |
1760 |
|
1761 |
if (!has_format) {
|
1762 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1763 |
} |
1764 |
if (format) {
|
1765 |
drv = bdrv_find_format(format); |
1766 |
if (!drv) {
|
1767 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1768 |
return;
|
1769 |
} |
1770 |
} |
1771 |
|
1772 |
if (bdrv_in_use(bs)) {
|
1773 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1774 |
return;
|
1775 |
} |
1776 |
|
1777 |
flags = bs->open_flags | BDRV_O_RDWR; |
1778 |
|
1779 |
/* See if we have a backing HD we can use to create our new image
|
1780 |
* on top of. */
|
1781 |
if (sync == MIRROR_SYNC_MODE_TOP) {
|
1782 |
source = bs->backing_hd; |
1783 |
if (!source) {
|
1784 |
sync = MIRROR_SYNC_MODE_FULL; |
1785 |
} |
1786 |
} |
1787 |
if (sync == MIRROR_SYNC_MODE_NONE) {
|
1788 |
source = bs; |
1789 |
} |
1790 |
|
1791 |
size = bdrv_getlength(bs); |
1792 |
if (size < 0) { |
1793 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
1794 |
return;
|
1795 |
} |
1796 |
|
1797 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
1798 |
assert(format && drv); |
1799 |
if (source) {
|
1800 |
bdrv_img_create(target, format, source->filename, |
1801 |
source->drv->format_name, NULL,
|
1802 |
size, flags, &local_err, false);
|
1803 |
} else {
|
1804 |
bdrv_img_create(target, format, NULL, NULL, NULL, |
1805 |
size, flags, &local_err, false);
|
1806 |
} |
1807 |
} |
1808 |
|
1809 |
if (error_is_set(&local_err)) {
|
1810 |
error_propagate(errp, local_err); |
1811 |
return;
|
1812 |
} |
1813 |
|
1814 |
target_bs = bdrv_new("");
|
1815 |
ret = bdrv_open(target_bs, target, NULL, flags, drv, &local_err);
|
1816 |
if (ret < 0) { |
1817 |
bdrv_unref(target_bs); |
1818 |
error_propagate(errp, local_err); |
1819 |
return;
|
1820 |
} |
1821 |
|
1822 |
backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error, |
1823 |
block_job_cb, bs, &local_err); |
1824 |
if (local_err != NULL) { |
1825 |
bdrv_unref(target_bs); |
1826 |
error_propagate(errp, local_err); |
1827 |
return;
|
1828 |
} |
1829 |
} |
1830 |
|
1831 |
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20) |
1832 |
|
1833 |
void qmp_drive_mirror(const char *device, const char *target, |
1834 |
bool has_format, const char *format, |
1835 |
enum MirrorSyncMode sync,
|
1836 |
bool has_mode, enum NewImageMode mode, |
1837 |
bool has_speed, int64_t speed,
|
1838 |
bool has_granularity, uint32_t granularity,
|
1839 |
bool has_buf_size, int64_t buf_size,
|
1840 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1841 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1842 |
Error **errp) |
1843 |
{ |
1844 |
BlockDriverState *bs; |
1845 |
BlockDriverState *source, *target_bs; |
1846 |
BlockDriver *drv = NULL;
|
1847 |
Error *local_err = NULL;
|
1848 |
int flags;
|
1849 |
int64_t size; |
1850 |
int ret;
|
1851 |
|
1852 |
if (!has_speed) {
|
1853 |
speed = 0;
|
1854 |
} |
1855 |
if (!has_on_source_error) {
|
1856 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1857 |
} |
1858 |
if (!has_on_target_error) {
|
1859 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1860 |
} |
1861 |
if (!has_mode) {
|
1862 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1863 |
} |
1864 |
if (!has_granularity) {
|
1865 |
granularity = 0;
|
1866 |
} |
1867 |
if (!has_buf_size) {
|
1868 |
buf_size = DEFAULT_MIRROR_BUF_SIZE; |
1869 |
} |
1870 |
|
1871 |
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
1872 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1873 |
return;
|
1874 |
} |
1875 |
if (granularity & (granularity - 1)) { |
1876 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1877 |
return;
|
1878 |
} |
1879 |
|
1880 |
bs = bdrv_find(device); |
1881 |
if (!bs) {
|
1882 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1883 |
return;
|
1884 |
} |
1885 |
|
1886 |
if (!bdrv_is_inserted(bs)) {
|
1887 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1888 |
return;
|
1889 |
} |
1890 |
|
1891 |
if (!has_format) {
|
1892 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1893 |
} |
1894 |
if (format) {
|
1895 |
drv = bdrv_find_format(format); |
1896 |
if (!drv) {
|
1897 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1898 |
return;
|
1899 |
} |
1900 |
} |
1901 |
|
1902 |
if (bdrv_in_use(bs)) {
|
1903 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1904 |
return;
|
1905 |
} |
1906 |
|
1907 |
flags = bs->open_flags | BDRV_O_RDWR; |
1908 |
source = bs->backing_hd; |
1909 |
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
1910 |
sync = MIRROR_SYNC_MODE_FULL; |
1911 |
} |
1912 |
|
1913 |
size = bdrv_getlength(bs); |
1914 |
if (size < 0) { |
1915 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
1916 |
return;
|
1917 |
} |
1918 |
|
1919 |
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
|
1920 |
/* create new image w/o backing file */
|
1921 |
assert(format && drv); |
1922 |
bdrv_img_create(target, format, |
1923 |
NULL, NULL, NULL, size, flags, &local_err, false); |
1924 |
} else {
|
1925 |
switch (mode) {
|
1926 |
case NEW_IMAGE_MODE_EXISTING:
|
1927 |
ret = 0;
|
1928 |
break;
|
1929 |
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
1930 |
/* create new image with backing file */
|
1931 |
bdrv_img_create(target, format, |
1932 |
source->filename, |
1933 |
source->drv->format_name, |
1934 |
NULL, size, flags, &local_err, false); |
1935 |
break;
|
1936 |
default:
|
1937 |
abort(); |
1938 |
} |
1939 |
} |
1940 |
|
1941 |
if (error_is_set(&local_err)) {
|
1942 |
error_propagate(errp, local_err); |
1943 |
return;
|
1944 |
} |
1945 |
|
1946 |
/* Mirroring takes care of copy-on-write using the source's backing
|
1947 |
* file.
|
1948 |
*/
|
1949 |
target_bs = bdrv_new("");
|
1950 |
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv,
|
1951 |
&local_err); |
1952 |
if (ret < 0) { |
1953 |
bdrv_unref(target_bs); |
1954 |
error_propagate(errp, local_err); |
1955 |
return;
|
1956 |
} |
1957 |
|
1958 |
mirror_start(bs, target_bs, speed, granularity, buf_size, sync, |
1959 |
on_source_error, on_target_error, |
1960 |
block_job_cb, bs, &local_err); |
1961 |
if (local_err != NULL) { |
1962 |
bdrv_unref(target_bs); |
1963 |
error_propagate(errp, local_err); |
1964 |
return;
|
1965 |
} |
1966 |
} |
1967 |
|
1968 |
static BlockJob *find_block_job(const char *device) |
1969 |
{ |
1970 |
BlockDriverState *bs; |
1971 |
|
1972 |
bs = bdrv_find(device); |
1973 |
if (!bs || !bs->job) {
|
1974 |
return NULL; |
1975 |
} |
1976 |
return bs->job;
|
1977 |
} |
1978 |
|
1979 |
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
1980 |
{ |
1981 |
BlockJob *job = find_block_job(device); |
1982 |
|
1983 |
if (!job) {
|
1984 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1985 |
return;
|
1986 |
} |
1987 |
|
1988 |
block_job_set_speed(job, speed, errp); |
1989 |
} |
1990 |
|
1991 |
void qmp_block_job_cancel(const char *device, |
1992 |
bool has_force, bool force, Error **errp) |
1993 |
{ |
1994 |
BlockJob *job = find_block_job(device); |
1995 |
|
1996 |
if (!has_force) {
|
1997 |
force = false;
|
1998 |
} |
1999 |
|
2000 |
if (!job) {
|
2001 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2002 |
return;
|
2003 |
} |
2004 |
if (job->paused && !force) {
|
2005 |
error_set(errp, QERR_BLOCK_JOB_PAUSED, device); |
2006 |
return;
|
2007 |
} |
2008 |
|
2009 |
trace_qmp_block_job_cancel(job); |
2010 |
block_job_cancel(job); |
2011 |
} |
2012 |
|
2013 |
void qmp_block_job_pause(const char *device, Error **errp) |
2014 |
{ |
2015 |
BlockJob *job = find_block_job(device); |
2016 |
|
2017 |
if (!job) {
|
2018 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2019 |
return;
|
2020 |
} |
2021 |
|
2022 |
trace_qmp_block_job_pause(job); |
2023 |
block_job_pause(job); |
2024 |
} |
2025 |
|
2026 |
void qmp_block_job_resume(const char *device, Error **errp) |
2027 |
{ |
2028 |
BlockJob *job = find_block_job(device); |
2029 |
|
2030 |
if (!job) {
|
2031 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2032 |
return;
|
2033 |
} |
2034 |
|
2035 |
trace_qmp_block_job_resume(job); |
2036 |
block_job_resume(job); |
2037 |
} |
2038 |
|
2039 |
void qmp_block_job_complete(const char *device, Error **errp) |
2040 |
{ |
2041 |
BlockJob *job = find_block_job(device); |
2042 |
|
2043 |
if (!job) {
|
2044 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2045 |
return;
|
2046 |
} |
2047 |
|
2048 |
trace_qmp_block_job_complete(job); |
2049 |
block_job_complete(job, errp); |
2050 |
} |
2051 |
|
2052 |
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
2053 |
{ |
2054 |
BlockJobInfoList **prev = opaque; |
2055 |
BlockJob *job = bs->job; |
2056 |
|
2057 |
if (job) {
|
2058 |
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
2059 |
elem->value = block_job_query(bs->job); |
2060 |
(*prev)->next = elem; |
2061 |
*prev = elem; |
2062 |
} |
2063 |
} |
2064 |
|
2065 |
BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
2066 |
{ |
2067 |
/* Dummy is a fake list element for holding the head pointer */
|
2068 |
BlockJobInfoList dummy = {}; |
2069 |
BlockJobInfoList *prev = &dummy; |
2070 |
bdrv_iterate(do_qmp_query_block_jobs_one, &prev); |
2071 |
return dummy.next;
|
2072 |
} |
2073 |
|
2074 |
QemuOptsList qemu_common_drive_opts = { |
2075 |
.name = "drive",
|
2076 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
2077 |
.desc = { |
2078 |
{ |
2079 |
.name = "bus",
|
2080 |
.type = QEMU_OPT_NUMBER, |
2081 |
.help = "bus number",
|
2082 |
},{ |
2083 |
.name = "unit",
|
2084 |
.type = QEMU_OPT_NUMBER, |
2085 |
.help = "unit number (i.e. lun for scsi)",
|
2086 |
},{ |
2087 |
.name = "if",
|
2088 |
.type = QEMU_OPT_STRING, |
2089 |
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
2090 |
},{ |
2091 |
.name = "index",
|
2092 |
.type = QEMU_OPT_NUMBER, |
2093 |
.help = "index number",
|
2094 |
},{ |
2095 |
.name = "cyls",
|
2096 |
.type = QEMU_OPT_NUMBER, |
2097 |
.help = "number of cylinders (ide disk geometry)",
|
2098 |
},{ |
2099 |
.name = "heads",
|
2100 |
.type = QEMU_OPT_NUMBER, |
2101 |
.help = "number of heads (ide disk geometry)",
|
2102 |
},{ |
2103 |
.name = "secs",
|
2104 |
.type = QEMU_OPT_NUMBER, |
2105 |
.help = "number of sectors (ide disk geometry)",
|
2106 |
},{ |
2107 |
.name = "trans",
|
2108 |
.type = QEMU_OPT_STRING, |
2109 |
.help = "chs translation (auto, lba. none)",
|
2110 |
},{ |
2111 |
.name = "media",
|
2112 |
.type = QEMU_OPT_STRING, |
2113 |
.help = "media type (disk, cdrom)",
|
2114 |
},{ |
2115 |
.name = "snapshot",
|
2116 |
.type = QEMU_OPT_BOOL, |
2117 |
.help = "enable/disable snapshot mode",
|
2118 |
},{ |
2119 |
.name = "file",
|
2120 |
.type = QEMU_OPT_STRING, |
2121 |
.help = "disk image",
|
2122 |
},{ |
2123 |
.name = "discard",
|
2124 |
.type = QEMU_OPT_STRING, |
2125 |
.help = "discard operation (ignore/off, unmap/on)",
|
2126 |
},{ |
2127 |
.name = "cache.writeback",
|
2128 |
.type = QEMU_OPT_BOOL, |
2129 |
.help = "enables writeback mode for any caches",
|
2130 |
},{ |
2131 |
.name = "cache.direct",
|
2132 |
.type = QEMU_OPT_BOOL, |
2133 |
.help = "enables use of O_DIRECT (bypass the host page cache)",
|
2134 |
},{ |
2135 |
.name = "cache.no-flush",
|
2136 |
.type = QEMU_OPT_BOOL, |
2137 |
.help = "ignore any flush requests for the device",
|
2138 |
},{ |
2139 |
.name = "aio",
|
2140 |
.type = QEMU_OPT_STRING, |
2141 |
.help = "host AIO implementation (threads, native)",
|
2142 |
},{ |
2143 |
.name = "format",
|
2144 |
.type = QEMU_OPT_STRING, |
2145 |
.help = "disk format (raw, qcow2, ...)",
|
2146 |
},{ |
2147 |
.name = "serial",
|
2148 |
.type = QEMU_OPT_STRING, |
2149 |
.help = "disk serial number",
|
2150 |
},{ |
2151 |
.name = "rerror",
|
2152 |
.type = QEMU_OPT_STRING, |
2153 |
.help = "read error action",
|
2154 |
},{ |
2155 |
.name = "werror",
|
2156 |
.type = QEMU_OPT_STRING, |
2157 |
.help = "write error action",
|
2158 |
},{ |
2159 |
.name = "addr",
|
2160 |
.type = QEMU_OPT_STRING, |
2161 |
.help = "pci address (virtio only)",
|
2162 |
},{ |
2163 |
.name = "read-only",
|
2164 |
.type = QEMU_OPT_BOOL, |
2165 |
.help = "open drive file as read-only",
|
2166 |
},{ |
2167 |
.name = "throttling.iops-total",
|
2168 |
.type = QEMU_OPT_NUMBER, |
2169 |
.help = "limit total I/O operations per second",
|
2170 |
},{ |
2171 |
.name = "throttling.iops-read",
|
2172 |
.type = QEMU_OPT_NUMBER, |
2173 |
.help = "limit read operations per second",
|
2174 |
},{ |
2175 |
.name = "throttling.iops-write",
|
2176 |
.type = QEMU_OPT_NUMBER, |
2177 |
.help = "limit write operations per second",
|
2178 |
},{ |
2179 |
.name = "throttling.bps-total",
|
2180 |
.type = QEMU_OPT_NUMBER, |
2181 |
.help = "limit total bytes per second",
|
2182 |
},{ |
2183 |
.name = "throttling.bps-read",
|
2184 |
.type = QEMU_OPT_NUMBER, |
2185 |
.help = "limit read bytes per second",
|
2186 |
},{ |
2187 |
.name = "throttling.bps-write",
|
2188 |
.type = QEMU_OPT_NUMBER, |
2189 |
.help = "limit write bytes per second",
|
2190 |
},{ |
2191 |
.name = "throttling.iops-total-max",
|
2192 |
.type = QEMU_OPT_NUMBER, |
2193 |
.help = "I/O operations burst",
|
2194 |
},{ |
2195 |
.name = "throttling.iops-read-max",
|
2196 |
.type = QEMU_OPT_NUMBER, |
2197 |
.help = "I/O operations read burst",
|
2198 |
},{ |
2199 |
.name = "throttling.iops-write-max",
|
2200 |
.type = QEMU_OPT_NUMBER, |
2201 |
.help = "I/O operations write burst",
|
2202 |
},{ |
2203 |
.name = "throttling.bps-total-max",
|
2204 |
.type = QEMU_OPT_NUMBER, |
2205 |
.help = "total bytes burst",
|
2206 |
},{ |
2207 |
.name = "throttling.bps-read-max",
|
2208 |
.type = QEMU_OPT_NUMBER, |
2209 |
.help = "total bytes read burst",
|
2210 |
},{ |
2211 |
.name = "throttling.bps-write-max",
|
2212 |
.type = QEMU_OPT_NUMBER, |
2213 |
.help = "total bytes write burst",
|
2214 |
},{ |
2215 |
.name = "throttling.iops-size",
|
2216 |
.type = QEMU_OPT_NUMBER, |
2217 |
.help = "when limiting by iops max size of an I/O in bytes",
|
2218 |
},{ |
2219 |
.name = "copy-on-read",
|
2220 |
.type = QEMU_OPT_BOOL, |
2221 |
.help = "copy read data from backing file into image file",
|
2222 |
},{ |
2223 |
.name = "boot",
|
2224 |
.type = QEMU_OPT_BOOL, |
2225 |
.help = "(deprecated, ignored)",
|
2226 |
}, |
2227 |
{ /* end of list */ }
|
2228 |
}, |
2229 |
}; |
2230 |
|
2231 |
QemuOptsList qemu_drive_opts = { |
2232 |
.name = "drive",
|
2233 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), |
2234 |
.desc = { |
2235 |
/*
|
2236 |
* no elements => accept any params
|
2237 |
* validation will happen later
|
2238 |
*/
|
2239 |
{ /* end of list */ }
|
2240 |
}, |
2241 |
}; |