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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 "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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extern QemuOptsList qemu_common_drive_opts;
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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_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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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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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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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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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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/* Takes the ownership of bs_opts */
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static DriveInfo *blockdev_init(QDict *bs_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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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 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_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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qemu_opts_absorb_qdict(opts, bs_opts, &error); |
351 |
if (error_is_set(&error)) {
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qerror_report_err(error); |
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error_free(error); |
354 |
return NULL; |
355 |
} |
356 |
|
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if (id) {
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qdict_del(bs_opts, "id");
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} |
360 |
|
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has_driver_specific_opts = !!qdict_size(bs_opts); |
362 |
|
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/* extract parameters */
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bus_id = qemu_opt_get_number(opts, "bus", 0); |
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unit_id = qemu_opt_get_number(opts, "unit", -1); |
366 |
index = qemu_opt_get_number(opts, "index", -1); |
367 |
|
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cyls = qemu_opt_get_number(opts, "cyls", 0); |
369 |
heads = qemu_opt_get_number(opts, "heads", 0); |
370 |
secs = qemu_opt_get_number(opts, "secs", 0); |
371 |
|
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snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
373 |
ro = qemu_opt_get_bool(opts, "read-only", 0); |
374 |
copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
375 |
|
376 |
file = qemu_opt_get(opts, "file");
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377 |
serial = qemu_opt_get(opts, "serial");
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378 |
|
379 |
if ((buf = qemu_opt_get(opts, "if")) != NULL) { |
380 |
for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
381 |
; |
382 |
if (type == IF_COUNT) {
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383 |
error_report("unsupported bus type '%s'", buf);
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return NULL; |
385 |
} |
386 |
} else {
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387 |
type = block_default_type; |
388 |
} |
389 |
|
390 |
max_devs = if_max_devs[type]; |
391 |
|
392 |
if (cyls || heads || secs) {
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393 |
if (cyls < 1) { |
394 |
error_report("invalid physical cyls number");
|
395 |
return NULL; |
396 |
} |
397 |
if (heads < 1) { |
398 |
error_report("invalid physical heads number");
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399 |
return NULL; |
400 |
} |
401 |
if (secs < 1) { |
402 |
error_report("invalid physical secs number");
|
403 |
return NULL; |
404 |
} |
405 |
} |
406 |
|
407 |
if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
408 |
if (!cyls) {
|
409 |
error_report("'%s' trans must be used with cyls, heads and secs",
|
410 |
buf); |
411 |
return NULL; |
412 |
} |
413 |
if (!strcmp(buf, "none")) |
414 |
translation = BIOS_ATA_TRANSLATION_NONE; |
415 |
else if (!strcmp(buf, "lba")) |
416 |
translation = BIOS_ATA_TRANSLATION_LBA; |
417 |
else if (!strcmp(buf, "auto")) |
418 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
419 |
else {
|
420 |
error_report("'%s' invalid translation type", buf);
|
421 |
return NULL; |
422 |
} |
423 |
} |
424 |
|
425 |
if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
426 |
if (!strcmp(buf, "disk")) { |
427 |
media = MEDIA_DISK; |
428 |
} else if (!strcmp(buf, "cdrom")) { |
429 |
if (cyls || secs || heads) {
|
430 |
error_report("CHS can't be set with media=%s", buf);
|
431 |
return NULL; |
432 |
} |
433 |
media = MEDIA_CDROM; |
434 |
} else {
|
435 |
error_report("'%s' invalid media", buf);
|
436 |
return NULL; |
437 |
} |
438 |
} |
439 |
|
440 |
if ((buf = qemu_opt_get(opts, "discard")) != NULL) { |
441 |
if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { |
442 |
error_report("invalid discard option");
|
443 |
return NULL; |
444 |
} |
445 |
} |
446 |
|
447 |
if (qemu_opt_get_bool(opts, "cache.writeback", true)) { |
448 |
bdrv_flags |= BDRV_O_CACHE_WB; |
449 |
} |
450 |
if (qemu_opt_get_bool(opts, "cache.direct", false)) { |
451 |
bdrv_flags |= BDRV_O_NOCACHE; |
452 |
} |
453 |
if (qemu_opt_get_bool(opts, "cache.no-flush", false)) { |
454 |
bdrv_flags |= BDRV_O_NO_FLUSH; |
455 |
} |
456 |
|
457 |
#ifdef CONFIG_LINUX_AIO
|
458 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
459 |
if (!strcmp(buf, "native")) { |
460 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
461 |
} else if (!strcmp(buf, "threads")) { |
462 |
/* this is the default */
|
463 |
} else {
|
464 |
error_report("invalid aio option");
|
465 |
return NULL; |
466 |
} |
467 |
} |
468 |
#endif
|
469 |
|
470 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
471 |
if (is_help_option(buf)) {
|
472 |
error_printf("Supported formats:");
|
473 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
474 |
error_printf("\n");
|
475 |
return NULL; |
476 |
} |
477 |
|
478 |
drv = bdrv_find_format(buf); |
479 |
if (!drv) {
|
480 |
error_report("'%s' invalid format", buf);
|
481 |
return NULL; |
482 |
} |
483 |
} |
484 |
|
485 |
/* disk I/O throttling */
|
486 |
memset(&cfg, 0, sizeof(cfg)); |
487 |
cfg.buckets[THROTTLE_BPS_TOTAL].avg = |
488 |
qemu_opt_get_number(opts, "throttling.bps-total", 0); |
489 |
cfg.buckets[THROTTLE_BPS_READ].avg = |
490 |
qemu_opt_get_number(opts, "throttling.bps-read", 0); |
491 |
cfg.buckets[THROTTLE_BPS_WRITE].avg = |
492 |
qemu_opt_get_number(opts, "throttling.bps-write", 0); |
493 |
cfg.buckets[THROTTLE_OPS_TOTAL].avg = |
494 |
qemu_opt_get_number(opts, "throttling.iops-total", 0); |
495 |
cfg.buckets[THROTTLE_OPS_READ].avg = |
496 |
qemu_opt_get_number(opts, "throttling.iops-read", 0); |
497 |
cfg.buckets[THROTTLE_OPS_WRITE].avg = |
498 |
qemu_opt_get_number(opts, "throttling.iops-write", 0); |
499 |
|
500 |
cfg.buckets[THROTTLE_BPS_TOTAL].max = |
501 |
qemu_opt_get_number(opts, "throttling.bps-total-max", 0); |
502 |
cfg.buckets[THROTTLE_BPS_READ].max = |
503 |
qemu_opt_get_number(opts, "throttling.bps-read-max", 0); |
504 |
cfg.buckets[THROTTLE_BPS_WRITE].max = |
505 |
qemu_opt_get_number(opts, "throttling.bps-write-max", 0); |
506 |
cfg.buckets[THROTTLE_OPS_TOTAL].max = |
507 |
qemu_opt_get_number(opts, "throttling.iops-total-max", 0); |
508 |
cfg.buckets[THROTTLE_OPS_READ].max = |
509 |
qemu_opt_get_number(opts, "throttling.iops-read-max", 0); |
510 |
cfg.buckets[THROTTLE_OPS_WRITE].max = |
511 |
qemu_opt_get_number(opts, "throttling.iops-write-max", 0); |
512 |
|
513 |
cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0); |
514 |
|
515 |
if (!check_throttle_config(&cfg, &error)) {
|
516 |
error_report("%s", error_get_pretty(error));
|
517 |
error_free(error); |
518 |
return NULL; |
519 |
} |
520 |
|
521 |
if (qemu_opt_get(opts, "boot") != NULL) { |
522 |
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
523 |
"ignored. Future versions will reject this parameter. Please "
|
524 |
"update your scripts.\n");
|
525 |
} |
526 |
|
527 |
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
528 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
529 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
530 |
error_report("werror is not supported by this bus type");
|
531 |
return NULL; |
532 |
} |
533 |
|
534 |
on_write_error = parse_block_error_action(buf, 0);
|
535 |
if (on_write_error < 0) { |
536 |
return NULL; |
537 |
} |
538 |
} |
539 |
|
540 |
on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
541 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
542 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
543 |
error_report("rerror is not supported by this bus type");
|
544 |
return NULL; |
545 |
} |
546 |
|
547 |
on_read_error = parse_block_error_action(buf, 1);
|
548 |
if (on_read_error < 0) { |
549 |
return NULL; |
550 |
} |
551 |
} |
552 |
|
553 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
554 |
if (type != IF_VIRTIO) {
|
555 |
error_report("addr is not supported by this bus type");
|
556 |
return NULL; |
557 |
} |
558 |
} |
559 |
|
560 |
/* compute bus and unit according index */
|
561 |
|
562 |
if (index != -1) { |
563 |
if (bus_id != 0 || unit_id != -1) { |
564 |
error_report("index cannot be used with bus and unit");
|
565 |
return NULL; |
566 |
} |
567 |
bus_id = drive_index_to_bus_id(type, index); |
568 |
unit_id = drive_index_to_unit_id(type, index); |
569 |
} |
570 |
|
571 |
/* if user doesn't specify a unit_id,
|
572 |
* try to find the first free
|
573 |
*/
|
574 |
|
575 |
if (unit_id == -1) { |
576 |
unit_id = 0;
|
577 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
578 |
unit_id++; |
579 |
if (max_devs && unit_id >= max_devs) {
|
580 |
unit_id -= max_devs; |
581 |
bus_id++; |
582 |
} |
583 |
} |
584 |
} |
585 |
|
586 |
/* check unit id */
|
587 |
|
588 |
if (max_devs && unit_id >= max_devs) {
|
589 |
error_report("unit %d too big (max is %d)",
|
590 |
unit_id, max_devs - 1);
|
591 |
return NULL; |
592 |
} |
593 |
|
594 |
/*
|
595 |
* catch multiple definitions
|
596 |
*/
|
597 |
|
598 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
599 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
600 |
bus_id, unit_id, index); |
601 |
return NULL; |
602 |
} |
603 |
|
604 |
/* no id supplied -> create one */
|
605 |
if (qemu_opts_id(opts) == NULL) { |
606 |
char *new_id;
|
607 |
if (type == IF_IDE || type == IF_SCSI) {
|
608 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
609 |
} |
610 |
if (max_devs) {
|
611 |
new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
|
612 |
mediastr, unit_id); |
613 |
} else {
|
614 |
new_id = g_strdup_printf("%s%s%i", if_name[type],
|
615 |
mediastr, unit_id); |
616 |
} |
617 |
qemu_opts_set_id(opts, new_id); |
618 |
} |
619 |
|
620 |
/* init */
|
621 |
dinfo = g_malloc0(sizeof(*dinfo));
|
622 |
dinfo->id = g_strdup(qemu_opts_id(opts)); |
623 |
dinfo->bdrv = bdrv_new(dinfo->id); |
624 |
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
625 |
dinfo->bdrv->read_only = ro; |
626 |
dinfo->devaddr = devaddr; |
627 |
dinfo->type = type; |
628 |
dinfo->bus = bus_id; |
629 |
dinfo->unit = unit_id; |
630 |
dinfo->cyls = cyls; |
631 |
dinfo->heads = heads; |
632 |
dinfo->secs = secs; |
633 |
dinfo->trans = translation; |
634 |
dinfo->refcount = 1;
|
635 |
if (serial != NULL) { |
636 |
dinfo->serial = g_strdup(serial); |
637 |
} |
638 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
639 |
|
640 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
641 |
|
642 |
/* disk I/O throttling */
|
643 |
if (throttle_enabled(&cfg)) {
|
644 |
bdrv_io_limits_enable(dinfo->bdrv); |
645 |
bdrv_set_io_limits(dinfo->bdrv, &cfg); |
646 |
} |
647 |
|
648 |
switch(type) {
|
649 |
case IF_IDE:
|
650 |
case IF_SCSI:
|
651 |
case IF_XEN:
|
652 |
case IF_NONE:
|
653 |
dinfo->media_cd = media == MEDIA_CDROM; |
654 |
break;
|
655 |
case IF_SD:
|
656 |
case IF_FLOPPY:
|
657 |
case IF_PFLASH:
|
658 |
case IF_MTD:
|
659 |
break;
|
660 |
case IF_VIRTIO:
|
661 |
{ |
662 |
/* add virtio block device */
|
663 |
QemuOpts *devopts; |
664 |
devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
|
665 |
if (arch_type == QEMU_ARCH_S390X) {
|
666 |
qemu_opt_set(devopts, "driver", "virtio-blk-s390"); |
667 |
} else {
|
668 |
qemu_opt_set(devopts, "driver", "virtio-blk-pci"); |
669 |
} |
670 |
qemu_opt_set(devopts, "drive", dinfo->id);
|
671 |
if (devaddr)
|
672 |
qemu_opt_set(devopts, "addr", devaddr);
|
673 |
break;
|
674 |
} |
675 |
default:
|
676 |
abort(); |
677 |
} |
678 |
if (!file || !*file) {
|
679 |
if (has_driver_specific_opts) {
|
680 |
file = NULL;
|
681 |
} else {
|
682 |
return dinfo;
|
683 |
} |
684 |
} |
685 |
if (snapshot) {
|
686 |
/* always use cache=unsafe with snapshot */
|
687 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
688 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
689 |
} |
690 |
|
691 |
if (copy_on_read) {
|
692 |
bdrv_flags |= BDRV_O_COPY_ON_READ; |
693 |
} |
694 |
|
695 |
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
696 |
bdrv_flags |= BDRV_O_INCOMING; |
697 |
} |
698 |
|
699 |
if (media == MEDIA_CDROM) {
|
700 |
/* CDROM is fine for any interface, don't check. */
|
701 |
ro = 1;
|
702 |
} else if (ro == 1) { |
703 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
|
704 |
type != IF_NONE && type != IF_PFLASH) { |
705 |
error_report("read-only not supported by this bus type");
|
706 |
goto err;
|
707 |
} |
708 |
} |
709 |
|
710 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
711 |
|
712 |
if (ro && copy_on_read) {
|
713 |
error_report("warning: disabling copy_on_read on read-only drive");
|
714 |
} |
715 |
|
716 |
QINCREF(bs_opts); |
717 |
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error); |
718 |
|
719 |
if (ret < 0) { |
720 |
error_report("could not open disk image %s: %s",
|
721 |
file ?: dinfo->id, error_get_pretty(error)); |
722 |
goto err;
|
723 |
} |
724 |
|
725 |
if (bdrv_key_required(dinfo->bdrv))
|
726 |
autostart = 0;
|
727 |
|
728 |
QDECREF(bs_opts); |
729 |
qemu_opts_del(opts); |
730 |
|
731 |
return dinfo;
|
732 |
|
733 |
err:
|
734 |
qemu_opts_del(opts); |
735 |
QDECREF(bs_opts); |
736 |
bdrv_unref(dinfo->bdrv); |
737 |
g_free(dinfo->id); |
738 |
QTAILQ_REMOVE(&drives, dinfo, next); |
739 |
g_free(dinfo); |
740 |
return NULL; |
741 |
} |
742 |
|
743 |
static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to) |
744 |
{ |
745 |
const char *value; |
746 |
|
747 |
value = qemu_opt_get(opts, from); |
748 |
if (value) {
|
749 |
qemu_opt_set(opts, to, value); |
750 |
qemu_opt_unset(opts, from); |
751 |
} |
752 |
} |
753 |
|
754 |
DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) |
755 |
{ |
756 |
const char *value; |
757 |
DriveInfo *dinfo; |
758 |
QDict *bs_opts; |
759 |
|
760 |
/* Change legacy command line options into QMP ones */
|
761 |
qemu_opt_rename(all_opts, "iops", "throttling.iops-total"); |
762 |
qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read"); |
763 |
qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write"); |
764 |
|
765 |
qemu_opt_rename(all_opts, "bps", "throttling.bps-total"); |
766 |
qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read"); |
767 |
qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write"); |
768 |
|
769 |
qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max"); |
770 |
qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max"); |
771 |
qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max"); |
772 |
|
773 |
qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max"); |
774 |
qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max"); |
775 |
qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max"); |
776 |
|
777 |
qemu_opt_rename(all_opts, |
778 |
"iops_size", "throttling.iops-size"); |
779 |
|
780 |
qemu_opt_rename(all_opts, "readonly", "read-only"); |
781 |
|
782 |
value = qemu_opt_get(all_opts, "cache");
|
783 |
if (value) {
|
784 |
int flags = 0; |
785 |
|
786 |
if (bdrv_parse_cache_flags(value, &flags) != 0) { |
787 |
error_report("invalid cache option");
|
788 |
return NULL; |
789 |
} |
790 |
|
791 |
/* Specific options take precedence */
|
792 |
if (!qemu_opt_get(all_opts, "cache.writeback")) { |
793 |
qemu_opt_set_bool(all_opts, "cache.writeback",
|
794 |
!!(flags & BDRV_O_CACHE_WB)); |
795 |
} |
796 |
if (!qemu_opt_get(all_opts, "cache.direct")) { |
797 |
qemu_opt_set_bool(all_opts, "cache.direct",
|
798 |
!!(flags & BDRV_O_NOCACHE)); |
799 |
} |
800 |
if (!qemu_opt_get(all_opts, "cache.no-flush")) { |
801 |
qemu_opt_set_bool(all_opts, "cache.no-flush",
|
802 |
!!(flags & BDRV_O_NO_FLUSH)); |
803 |
} |
804 |
qemu_opt_unset(all_opts, "cache");
|
805 |
} |
806 |
|
807 |
/* Get a QDict for processing the options */
|
808 |
bs_opts = qdict_new(); |
809 |
qemu_opts_to_qdict(all_opts, bs_opts); |
810 |
|
811 |
/* Actual block device init: Functionality shared with blockdev-add */
|
812 |
dinfo = blockdev_init(bs_opts, block_default_type); |
813 |
if (dinfo == NULL) { |
814 |
goto fail;
|
815 |
} |
816 |
|
817 |
/* Set legacy DriveInfo fields */
|
818 |
dinfo->enable_auto_del = true;
|
819 |
dinfo->opts = all_opts; |
820 |
|
821 |
fail:
|
822 |
return dinfo;
|
823 |
} |
824 |
|
825 |
void do_commit(Monitor *mon, const QDict *qdict) |
826 |
{ |
827 |
const char *device = qdict_get_str(qdict, "device"); |
828 |
BlockDriverState *bs; |
829 |
int ret;
|
830 |
|
831 |
if (!strcmp(device, "all")) { |
832 |
ret = bdrv_commit_all(); |
833 |
} else {
|
834 |
bs = bdrv_find(device); |
835 |
if (!bs) {
|
836 |
monitor_printf(mon, "Device '%s' not found\n", device);
|
837 |
return;
|
838 |
} |
839 |
ret = bdrv_commit(bs); |
840 |
} |
841 |
if (ret < 0) { |
842 |
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
|
843 |
strerror(-ret)); |
844 |
} |
845 |
} |
846 |
|
847 |
static void blockdev_do_action(int kind, void *data, Error **errp) |
848 |
{ |
849 |
TransactionAction action; |
850 |
TransactionActionList list; |
851 |
|
852 |
action.kind = kind; |
853 |
action.data = data; |
854 |
list.value = &action; |
855 |
list.next = NULL;
|
856 |
qmp_transaction(&list, errp); |
857 |
} |
858 |
|
859 |
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
860 |
bool has_format, const char *format, |
861 |
bool has_mode, enum NewImageMode mode, |
862 |
Error **errp) |
863 |
{ |
864 |
BlockdevSnapshot snapshot = { |
865 |
.device = (char *) device,
|
866 |
.snapshot_file = (char *) snapshot_file,
|
867 |
.has_format = has_format, |
868 |
.format = (char *) format,
|
869 |
.has_mode = has_mode, |
870 |
.mode = mode, |
871 |
}; |
872 |
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
873 |
&snapshot, errp); |
874 |
} |
875 |
|
876 |
void qmp_blockdev_snapshot_internal_sync(const char *device, |
877 |
const char *name, |
878 |
Error **errp) |
879 |
{ |
880 |
BlockdevSnapshotInternal snapshot = { |
881 |
.device = (char *) device,
|
882 |
.name = (char *) name
|
883 |
}; |
884 |
|
885 |
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, |
886 |
&snapshot, errp); |
887 |
} |
888 |
|
889 |
SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
890 |
bool has_id,
|
891 |
const char *id, |
892 |
bool has_name,
|
893 |
const char *name, |
894 |
Error **errp) |
895 |
{ |
896 |
BlockDriverState *bs = bdrv_find(device); |
897 |
QEMUSnapshotInfo sn; |
898 |
Error *local_err = NULL;
|
899 |
SnapshotInfo *info = NULL;
|
900 |
int ret;
|
901 |
|
902 |
if (!bs) {
|
903 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
904 |
return NULL; |
905 |
} |
906 |
|
907 |
if (!has_id) {
|
908 |
id = NULL;
|
909 |
} |
910 |
|
911 |
if (!has_name) {
|
912 |
name = NULL;
|
913 |
} |
914 |
|
915 |
if (!id && !name) {
|
916 |
error_setg(errp, "Name or id must be provided");
|
917 |
return NULL; |
918 |
} |
919 |
|
920 |
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); |
921 |
if (error_is_set(&local_err)) {
|
922 |
error_propagate(errp, local_err); |
923 |
return NULL; |
924 |
} |
925 |
if (!ret) {
|
926 |
error_setg(errp, |
927 |
"Snapshot with id '%s' and name '%s' does not exist on "
|
928 |
"device '%s'",
|
929 |
STR_OR_NULL(id), STR_OR_NULL(name), device); |
930 |
return NULL; |
931 |
} |
932 |
|
933 |
bdrv_snapshot_delete(bs, id, name, &local_err); |
934 |
if (error_is_set(&local_err)) {
|
935 |
error_propagate(errp, local_err); |
936 |
return NULL; |
937 |
} |
938 |
|
939 |
info = g_malloc0(sizeof(SnapshotInfo));
|
940 |
info->id = g_strdup(sn.id_str); |
941 |
info->name = g_strdup(sn.name); |
942 |
info->date_nsec = sn.date_nsec; |
943 |
info->date_sec = sn.date_sec; |
944 |
info->vm_state_size = sn.vm_state_size; |
945 |
info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
|
946 |
info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
|
947 |
|
948 |
return info;
|
949 |
} |
950 |
|
951 |
/* New and old BlockDriverState structs for group snapshots */
|
952 |
|
953 |
typedef struct BlkTransactionState BlkTransactionState; |
954 |
|
955 |
/* Only prepare() may fail. In a single transaction, only one of commit() or
|
956 |
abort() will be called, clean() will always be called if it present. */
|
957 |
typedef struct BdrvActionOps { |
958 |
/* Size of state struct, in bytes. */
|
959 |
size_t instance_size; |
960 |
/* Prepare the work, must NOT be NULL. */
|
961 |
void (*prepare)(BlkTransactionState *common, Error **errp);
|
962 |
/* Commit the changes, can be NULL. */
|
963 |
void (*commit)(BlkTransactionState *common);
|
964 |
/* Abort the changes on fail, can be NULL. */
|
965 |
void (*abort)(BlkTransactionState *common);
|
966 |
/* Clean up resource in the end, can be NULL. */
|
967 |
void (*clean)(BlkTransactionState *common);
|
968 |
} BdrvActionOps; |
969 |
|
970 |
/*
|
971 |
* This structure must be arranged as first member in child type, assuming
|
972 |
* that compiler will also arrange it to the same address with parent instance.
|
973 |
* Later it will be used in free().
|
974 |
*/
|
975 |
struct BlkTransactionState {
|
976 |
TransactionAction *action; |
977 |
const BdrvActionOps *ops;
|
978 |
QSIMPLEQ_ENTRY(BlkTransactionState) entry; |
979 |
}; |
980 |
|
981 |
/* internal snapshot private data */
|
982 |
typedef struct InternalSnapshotState { |
983 |
BlkTransactionState common; |
984 |
BlockDriverState *bs; |
985 |
QEMUSnapshotInfo sn; |
986 |
} InternalSnapshotState; |
987 |
|
988 |
static void internal_snapshot_prepare(BlkTransactionState *common, |
989 |
Error **errp) |
990 |
{ |
991 |
const char *device; |
992 |
const char *name; |
993 |
BlockDriverState *bs; |
994 |
QEMUSnapshotInfo old_sn, *sn; |
995 |
bool ret;
|
996 |
qemu_timeval tv; |
997 |
BlockdevSnapshotInternal *internal; |
998 |
InternalSnapshotState *state; |
999 |
int ret1;
|
1000 |
|
1001 |
g_assert(common->action->kind == |
1002 |
TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); |
1003 |
internal = common->action->blockdev_snapshot_internal_sync; |
1004 |
state = DO_UPCAST(InternalSnapshotState, common, common); |
1005 |
|
1006 |
/* 1. parse input */
|
1007 |
device = internal->device; |
1008 |
name = internal->name; |
1009 |
|
1010 |
/* 2. check for validation */
|
1011 |
bs = bdrv_find(device); |
1012 |
if (!bs) {
|
1013 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1014 |
return;
|
1015 |
} |
1016 |
|
1017 |
if (!bdrv_is_inserted(bs)) {
|
1018 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1019 |
return;
|
1020 |
} |
1021 |
|
1022 |
if (bdrv_is_read_only(bs)) {
|
1023 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
1024 |
return;
|
1025 |
} |
1026 |
|
1027 |
if (!bdrv_can_snapshot(bs)) {
|
1028 |
error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, |
1029 |
bs->drv->format_name, device, "internal snapshot");
|
1030 |
return;
|
1031 |
} |
1032 |
|
1033 |
if (!strlen(name)) {
|
1034 |
error_setg(errp, "Name is empty");
|
1035 |
return;
|
1036 |
} |
1037 |
|
1038 |
/* check whether a snapshot with name exist */
|
1039 |
ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, errp);
|
1040 |
if (error_is_set(errp)) {
|
1041 |
return;
|
1042 |
} else if (ret) { |
1043 |
error_setg(errp, |
1044 |
"Snapshot with name '%s' already exists on device '%s'",
|
1045 |
name, device); |
1046 |
return;
|
1047 |
} |
1048 |
|
1049 |
/* 3. take the snapshot */
|
1050 |
sn = &state->sn; |
1051 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
1052 |
qemu_gettimeofday(&tv); |
1053 |
sn->date_sec = tv.tv_sec; |
1054 |
sn->date_nsec = tv.tv_usec * 1000;
|
1055 |
sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
1056 |
|
1057 |
ret1 = bdrv_snapshot_create(bs, sn); |
1058 |
if (ret1 < 0) { |
1059 |
error_setg_errno(errp, -ret1, |
1060 |
"Failed to create snapshot '%s' on device '%s'",
|
1061 |
name, device); |
1062 |
return;
|
1063 |
} |
1064 |
|
1065 |
/* 4. succeed, mark a snapshot is created */
|
1066 |
state->bs = bs; |
1067 |
} |
1068 |
|
1069 |
static void internal_snapshot_abort(BlkTransactionState *common) |
1070 |
{ |
1071 |
InternalSnapshotState *state = |
1072 |
DO_UPCAST(InternalSnapshotState, common, common); |
1073 |
BlockDriverState *bs = state->bs; |
1074 |
QEMUSnapshotInfo *sn = &state->sn; |
1075 |
Error *local_error = NULL;
|
1076 |
|
1077 |
if (!bs) {
|
1078 |
return;
|
1079 |
} |
1080 |
|
1081 |
if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { |
1082 |
error_report("Failed to delete snapshot with id '%s' and name '%s' on "
|
1083 |
"device '%s' in abort: %s",
|
1084 |
sn->id_str, |
1085 |
sn->name, |
1086 |
bdrv_get_device_name(bs), |
1087 |
error_get_pretty(local_error)); |
1088 |
error_free(local_error); |
1089 |
} |
1090 |
} |
1091 |
|
1092 |
/* external snapshot private data */
|
1093 |
typedef struct ExternalSnapshotState { |
1094 |
BlkTransactionState common; |
1095 |
BlockDriverState *old_bs; |
1096 |
BlockDriverState *new_bs; |
1097 |
} ExternalSnapshotState; |
1098 |
|
1099 |
static void external_snapshot_prepare(BlkTransactionState *common, |
1100 |
Error **errp) |
1101 |
{ |
1102 |
BlockDriver *drv; |
1103 |
int flags, ret;
|
1104 |
Error *local_err = NULL;
|
1105 |
const char *device; |
1106 |
const char *new_image_file; |
1107 |
const char *format = "qcow2"; |
1108 |
enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
1109 |
ExternalSnapshotState *state = |
1110 |
DO_UPCAST(ExternalSnapshotState, common, common); |
1111 |
TransactionAction *action = common->action; |
1112 |
|
1113 |
/* get parameters */
|
1114 |
g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); |
1115 |
|
1116 |
device = action->blockdev_snapshot_sync->device; |
1117 |
new_image_file = action->blockdev_snapshot_sync->snapshot_file; |
1118 |
if (action->blockdev_snapshot_sync->has_format) {
|
1119 |
format = action->blockdev_snapshot_sync->format; |
1120 |
} |
1121 |
if (action->blockdev_snapshot_sync->has_mode) {
|
1122 |
mode = action->blockdev_snapshot_sync->mode; |
1123 |
} |
1124 |
|
1125 |
/* start processing */
|
1126 |
drv = bdrv_find_format(format); |
1127 |
if (!drv) {
|
1128 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1129 |
return;
|
1130 |
} |
1131 |
|
1132 |
state->old_bs = bdrv_find(device); |
1133 |
if (!state->old_bs) {
|
1134 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1135 |
return;
|
1136 |
} |
1137 |
|
1138 |
if (!bdrv_is_inserted(state->old_bs)) {
|
1139 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1140 |
return;
|
1141 |
} |
1142 |
|
1143 |
if (bdrv_in_use(state->old_bs)) {
|
1144 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1145 |
return;
|
1146 |
} |
1147 |
|
1148 |
if (!bdrv_is_read_only(state->old_bs)) {
|
1149 |
if (bdrv_flush(state->old_bs)) {
|
1150 |
error_set(errp, QERR_IO_ERROR); |
1151 |
return;
|
1152 |
} |
1153 |
} |
1154 |
|
1155 |
if (bdrv_check_ext_snapshot(state->old_bs) != EXT_SNAPSHOT_ALLOWED) {
|
1156 |
error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
|
1157 |
return;
|
1158 |
} |
1159 |
|
1160 |
flags = state->old_bs->open_flags; |
1161 |
|
1162 |
/* create new image w/backing file */
|
1163 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
1164 |
bdrv_img_create(new_image_file, format, |
1165 |
state->old_bs->filename, |
1166 |
state->old_bs->drv->format_name, |
1167 |
NULL, -1, flags, &local_err, false); |
1168 |
if (error_is_set(&local_err)) {
|
1169 |
error_propagate(errp, local_err); |
1170 |
return;
|
1171 |
} |
1172 |
} |
1173 |
|
1174 |
/* We will manually add the backing_hd field to the bs later */
|
1175 |
state->new_bs = bdrv_new("");
|
1176 |
/* TODO Inherit bs->options or only take explicit options with an
|
1177 |
* extended QMP command? */
|
1178 |
ret = bdrv_open(state->new_bs, new_image_file, NULL,
|
1179 |
flags | BDRV_O_NO_BACKING, drv, &local_err); |
1180 |
if (ret != 0) { |
1181 |
error_propagate(errp, local_err); |
1182 |
} |
1183 |
} |
1184 |
|
1185 |
static void external_snapshot_commit(BlkTransactionState *common) |
1186 |
{ |
1187 |
ExternalSnapshotState *state = |
1188 |
DO_UPCAST(ExternalSnapshotState, common, common); |
1189 |
|
1190 |
/* This removes our old bs and adds the new bs */
|
1191 |
bdrv_append(state->new_bs, state->old_bs); |
1192 |
/* We don't need (or want) to use the transactional
|
1193 |
* bdrv_reopen_multiple() across all the entries at once, because we
|
1194 |
* don't want to abort all of them if one of them fails the reopen */
|
1195 |
bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, |
1196 |
NULL);
|
1197 |
} |
1198 |
|
1199 |
static void external_snapshot_abort(BlkTransactionState *common) |
1200 |
{ |
1201 |
ExternalSnapshotState *state = |
1202 |
DO_UPCAST(ExternalSnapshotState, common, common); |
1203 |
if (state->new_bs) {
|
1204 |
bdrv_unref(state->new_bs); |
1205 |
} |
1206 |
} |
1207 |
|
1208 |
typedef struct DriveBackupState { |
1209 |
BlkTransactionState common; |
1210 |
BlockDriverState *bs; |
1211 |
BlockJob *job; |
1212 |
} DriveBackupState; |
1213 |
|
1214 |
static void drive_backup_prepare(BlkTransactionState *common, Error **errp) |
1215 |
{ |
1216 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1217 |
DriveBackup *backup; |
1218 |
Error *local_err = NULL;
|
1219 |
|
1220 |
assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
1221 |
backup = common->action->drive_backup; |
1222 |
|
1223 |
qmp_drive_backup(backup->device, backup->target, |
1224 |
backup->has_format, backup->format, |
1225 |
backup->sync, |
1226 |
backup->has_mode, backup->mode, |
1227 |
backup->has_speed, backup->speed, |
1228 |
backup->has_on_source_error, backup->on_source_error, |
1229 |
backup->has_on_target_error, backup->on_target_error, |
1230 |
&local_err); |
1231 |
if (error_is_set(&local_err)) {
|
1232 |
error_propagate(errp, local_err); |
1233 |
state->bs = NULL;
|
1234 |
state->job = NULL;
|
1235 |
return;
|
1236 |
} |
1237 |
|
1238 |
state->bs = bdrv_find(backup->device); |
1239 |
state->job = state->bs->job; |
1240 |
} |
1241 |
|
1242 |
static void drive_backup_abort(BlkTransactionState *common) |
1243 |
{ |
1244 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
1245 |
BlockDriverState *bs = state->bs; |
1246 |
|
1247 |
/* Only cancel if it's the job we started */
|
1248 |
if (bs && bs->job && bs->job == state->job) {
|
1249 |
block_job_cancel_sync(bs->job); |
1250 |
} |
1251 |
} |
1252 |
|
1253 |
static void abort_prepare(BlkTransactionState *common, Error **errp) |
1254 |
{ |
1255 |
error_setg(errp, "Transaction aborted using Abort action");
|
1256 |
} |
1257 |
|
1258 |
static void abort_commit(BlkTransactionState *common) |
1259 |
{ |
1260 |
g_assert_not_reached(); /* this action never succeeds */
|
1261 |
} |
1262 |
|
1263 |
static const BdrvActionOps actions[] = { |
1264 |
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
1265 |
.instance_size = sizeof(ExternalSnapshotState),
|
1266 |
.prepare = external_snapshot_prepare, |
1267 |
.commit = external_snapshot_commit, |
1268 |
.abort = external_snapshot_abort, |
1269 |
}, |
1270 |
[TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
1271 |
.instance_size = sizeof(DriveBackupState),
|
1272 |
.prepare = drive_backup_prepare, |
1273 |
.abort = drive_backup_abort, |
1274 |
}, |
1275 |
[TRANSACTION_ACTION_KIND_ABORT] = { |
1276 |
.instance_size = sizeof(BlkTransactionState),
|
1277 |
.prepare = abort_prepare, |
1278 |
.commit = abort_commit, |
1279 |
}, |
1280 |
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
1281 |
.instance_size = sizeof(InternalSnapshotState),
|
1282 |
.prepare = internal_snapshot_prepare, |
1283 |
.abort = internal_snapshot_abort, |
1284 |
}, |
1285 |
}; |
1286 |
|
1287 |
/*
|
1288 |
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
1289 |
* then we do not pivot any of the devices in the group, and abandon the
|
1290 |
* snapshots
|
1291 |
*/
|
1292 |
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
|
1293 |
{ |
1294 |
TransactionActionList *dev_entry = dev_list; |
1295 |
BlkTransactionState *state, *next; |
1296 |
Error *local_err = NULL;
|
1297 |
|
1298 |
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; |
1299 |
QSIMPLEQ_INIT(&snap_bdrv_states); |
1300 |
|
1301 |
/* drain all i/o before any snapshots */
|
1302 |
bdrv_drain_all(); |
1303 |
|
1304 |
/* We don't do anything in this loop that commits us to the snapshot */
|
1305 |
while (NULL != dev_entry) { |
1306 |
TransactionAction *dev_info = NULL;
|
1307 |
const BdrvActionOps *ops;
|
1308 |
|
1309 |
dev_info = dev_entry->value; |
1310 |
dev_entry = dev_entry->next; |
1311 |
|
1312 |
assert(dev_info->kind < ARRAY_SIZE(actions)); |
1313 |
|
1314 |
ops = &actions[dev_info->kind]; |
1315 |
assert(ops->instance_size > 0);
|
1316 |
|
1317 |
state = g_malloc0(ops->instance_size); |
1318 |
state->ops = ops; |
1319 |
state->action = dev_info; |
1320 |
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
1321 |
|
1322 |
state->ops->prepare(state, &local_err); |
1323 |
if (error_is_set(&local_err)) {
|
1324 |
error_propagate(errp, local_err); |
1325 |
goto delete_and_fail;
|
1326 |
} |
1327 |
} |
1328 |
|
1329 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1330 |
if (state->ops->commit) {
|
1331 |
state->ops->commit(state); |
1332 |
} |
1333 |
} |
1334 |
|
1335 |
/* success */
|
1336 |
goto exit;
|
1337 |
|
1338 |
delete_and_fail:
|
1339 |
/*
|
1340 |
* failure, and it is all-or-none; abandon each new bs, and keep using
|
1341 |
* the original bs for all images
|
1342 |
*/
|
1343 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1344 |
if (state->ops->abort) {
|
1345 |
state->ops->abort(state); |
1346 |
} |
1347 |
} |
1348 |
exit:
|
1349 |
QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
1350 |
if (state->ops->clean) {
|
1351 |
state->ops->clean(state); |
1352 |
} |
1353 |
g_free(state); |
1354 |
} |
1355 |
} |
1356 |
|
1357 |
|
1358 |
static void eject_device(BlockDriverState *bs, int force, Error **errp) |
1359 |
{ |
1360 |
if (bdrv_in_use(bs)) {
|
1361 |
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
1362 |
return;
|
1363 |
} |
1364 |
if (!bdrv_dev_has_removable_media(bs)) {
|
1365 |
error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
1366 |
return;
|
1367 |
} |
1368 |
|
1369 |
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
1370 |
bdrv_dev_eject_request(bs, force); |
1371 |
if (!force) {
|
1372 |
error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
1373 |
return;
|
1374 |
} |
1375 |
} |
1376 |
|
1377 |
bdrv_close(bs); |
1378 |
} |
1379 |
|
1380 |
void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
1381 |
{ |
1382 |
BlockDriverState *bs; |
1383 |
|
1384 |
bs = bdrv_find(device); |
1385 |
if (!bs) {
|
1386 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1387 |
return;
|
1388 |
} |
1389 |
|
1390 |
eject_device(bs, force, errp); |
1391 |
} |
1392 |
|
1393 |
void qmp_block_passwd(const char *device, const char *password, Error **errp) |
1394 |
{ |
1395 |
BlockDriverState *bs; |
1396 |
int err;
|
1397 |
|
1398 |
bs = bdrv_find(device); |
1399 |
if (!bs) {
|
1400 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1401 |
return;
|
1402 |
} |
1403 |
|
1404 |
err = bdrv_set_key(bs, password); |
1405 |
if (err == -EINVAL) {
|
1406 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1407 |
return;
|
1408 |
} else if (err < 0) { |
1409 |
error_set(errp, QERR_INVALID_PASSWORD); |
1410 |
return;
|
1411 |
} |
1412 |
} |
1413 |
|
1414 |
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
1415 |
int bdrv_flags, BlockDriver *drv,
|
1416 |
const char *password, Error **errp) |
1417 |
{ |
1418 |
Error *local_err = NULL;
|
1419 |
int ret;
|
1420 |
|
1421 |
ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv, &local_err);
|
1422 |
if (ret < 0) { |
1423 |
error_propagate(errp, local_err); |
1424 |
return;
|
1425 |
} |
1426 |
|
1427 |
if (bdrv_key_required(bs)) {
|
1428 |
if (password) {
|
1429 |
if (bdrv_set_key(bs, password) < 0) { |
1430 |
error_set(errp, QERR_INVALID_PASSWORD); |
1431 |
} |
1432 |
} else {
|
1433 |
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), |
1434 |
bdrv_get_encrypted_filename(bs)); |
1435 |
} |
1436 |
} else if (password) { |
1437 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1438 |
} |
1439 |
} |
1440 |
|
1441 |
void qmp_change_blockdev(const char *device, const char *filename, |
1442 |
bool has_format, const char *format, Error **errp) |
1443 |
{ |
1444 |
BlockDriverState *bs; |
1445 |
BlockDriver *drv = NULL;
|
1446 |
int bdrv_flags;
|
1447 |
Error *err = NULL;
|
1448 |
|
1449 |
bs = bdrv_find(device); |
1450 |
if (!bs) {
|
1451 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1452 |
return;
|
1453 |
} |
1454 |
|
1455 |
if (format) {
|
1456 |
drv = bdrv_find_whitelisted_format(format, bs->read_only); |
1457 |
if (!drv) {
|
1458 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1459 |
return;
|
1460 |
} |
1461 |
} |
1462 |
|
1463 |
eject_device(bs, 0, &err);
|
1464 |
if (error_is_set(&err)) {
|
1465 |
error_propagate(errp, err); |
1466 |
return;
|
1467 |
} |
1468 |
|
1469 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
1470 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
1471 |
|
1472 |
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
1473 |
} |
1474 |
|
1475 |
/* throttling disk I/O limits */
|
1476 |
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
1477 |
int64_t bps_wr, |
1478 |
int64_t iops, |
1479 |
int64_t iops_rd, |
1480 |
int64_t iops_wr, |
1481 |
bool has_bps_max,
|
1482 |
int64_t bps_max, |
1483 |
bool has_bps_rd_max,
|
1484 |
int64_t bps_rd_max, |
1485 |
bool has_bps_wr_max,
|
1486 |
int64_t bps_wr_max, |
1487 |
bool has_iops_max,
|
1488 |
int64_t iops_max, |
1489 |
bool has_iops_rd_max,
|
1490 |
int64_t iops_rd_max, |
1491 |
bool has_iops_wr_max,
|
1492 |
int64_t iops_wr_max, |
1493 |
bool has_iops_size,
|
1494 |
int64_t iops_size, Error **errp) |
1495 |
{ |
1496 |
ThrottleConfig cfg; |
1497 |
BlockDriverState *bs; |
1498 |
|
1499 |
bs = bdrv_find(device); |
1500 |
if (!bs) {
|
1501 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1502 |
return;
|
1503 |
} |
1504 |
|
1505 |
memset(&cfg, 0, sizeof(cfg)); |
1506 |
cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps; |
1507 |
cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd; |
1508 |
cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr; |
1509 |
|
1510 |
cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops; |
1511 |
cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd; |
1512 |
cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr; |
1513 |
|
1514 |
if (has_bps_max) {
|
1515 |
cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max; |
1516 |
} |
1517 |
if (has_bps_rd_max) {
|
1518 |
cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max; |
1519 |
} |
1520 |
if (has_bps_wr_max) {
|
1521 |
cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max; |
1522 |
} |
1523 |
if (has_iops_max) {
|
1524 |
cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max; |
1525 |
} |
1526 |
if (has_iops_rd_max) {
|
1527 |
cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max; |
1528 |
} |
1529 |
if (has_iops_wr_max) {
|
1530 |
cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max; |
1531 |
} |
1532 |
|
1533 |
if (has_iops_size) {
|
1534 |
cfg.op_size = iops_size; |
1535 |
} |
1536 |
|
1537 |
if (!check_throttle_config(&cfg, errp)) {
|
1538 |
return;
|
1539 |
} |
1540 |
|
1541 |
if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
|
1542 |
bdrv_io_limits_enable(bs); |
1543 |
} else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) { |
1544 |
bdrv_io_limits_disable(bs); |
1545 |
} |
1546 |
|
1547 |
if (bs->io_limits_enabled) {
|
1548 |
bdrv_set_io_limits(bs, &cfg); |
1549 |
} |
1550 |
} |
1551 |
|
1552 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
1553 |
{ |
1554 |
const char *id = qdict_get_str(qdict, "id"); |
1555 |
BlockDriverState *bs; |
1556 |
|
1557 |
bs = bdrv_find(id); |
1558 |
if (!bs) {
|
1559 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
1560 |
return -1; |
1561 |
} |
1562 |
if (bdrv_in_use(bs)) {
|
1563 |
qerror_report(QERR_DEVICE_IN_USE, id); |
1564 |
return -1; |
1565 |
} |
1566 |
|
1567 |
/* quiesce block driver; prevent further io */
|
1568 |
bdrv_drain_all(); |
1569 |
bdrv_flush(bs); |
1570 |
bdrv_close(bs); |
1571 |
|
1572 |
/* if we have a device attached to this BlockDriverState
|
1573 |
* then we need to make the drive anonymous until the device
|
1574 |
* can be removed. If this is a drive with no device backing
|
1575 |
* then we can just get rid of the block driver state right here.
|
1576 |
*/
|
1577 |
if (bdrv_get_attached_dev(bs)) {
|
1578 |
bdrv_make_anon(bs); |
1579 |
|
1580 |
/* Further I/O must not pause the guest */
|
1581 |
bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, |
1582 |
BLOCKDEV_ON_ERROR_REPORT); |
1583 |
} else {
|
1584 |
drive_uninit(drive_get_by_blockdev(bs)); |
1585 |
} |
1586 |
|
1587 |
return 0; |
1588 |
} |
1589 |
|
1590 |
void qmp_block_resize(const char *device, int64_t size, Error **errp) |
1591 |
{ |
1592 |
BlockDriverState *bs; |
1593 |
int ret;
|
1594 |
|
1595 |
bs = bdrv_find(device); |
1596 |
if (!bs) {
|
1597 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1598 |
return;
|
1599 |
} |
1600 |
|
1601 |
if (size < 0) { |
1602 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
1603 |
return;
|
1604 |
} |
1605 |
|
1606 |
/* complete all in-flight operations before resizing the device */
|
1607 |
bdrv_drain_all(); |
1608 |
|
1609 |
ret = bdrv_truncate(bs, size); |
1610 |
switch (ret) {
|
1611 |
case 0: |
1612 |
break;
|
1613 |
case -ENOMEDIUM:
|
1614 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1615 |
break;
|
1616 |
case -ENOTSUP:
|
1617 |
error_set(errp, QERR_UNSUPPORTED); |
1618 |
break;
|
1619 |
case -EACCES:
|
1620 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
1621 |
break;
|
1622 |
case -EBUSY:
|
1623 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1624 |
break;
|
1625 |
default:
|
1626 |
error_setg_errno(errp, -ret, "Could not resize");
|
1627 |
break;
|
1628 |
} |
1629 |
} |
1630 |
|
1631 |
static void block_job_cb(void *opaque, int ret) |
1632 |
{ |
1633 |
BlockDriverState *bs = opaque; |
1634 |
QObject *obj; |
1635 |
|
1636 |
trace_block_job_cb(bs, bs->job, ret); |
1637 |
|
1638 |
assert(bs->job); |
1639 |
obj = qobject_from_block_job(bs->job); |
1640 |
if (ret < 0) { |
1641 |
QDict *dict = qobject_to_qdict(obj); |
1642 |
qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
|
1643 |
} |
1644 |
|
1645 |
if (block_job_is_cancelled(bs->job)) {
|
1646 |
monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); |
1647 |
} else {
|
1648 |
monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); |
1649 |
} |
1650 |
qobject_decref(obj); |
1651 |
|
1652 |
bdrv_put_ref_bh_schedule(bs); |
1653 |
} |
1654 |
|
1655 |
void qmp_block_stream(const char *device, bool has_base, |
1656 |
const char *base, bool has_speed, int64_t speed, |
1657 |
bool has_on_error, BlockdevOnError on_error,
|
1658 |
Error **errp) |
1659 |
{ |
1660 |
BlockDriverState *bs; |
1661 |
BlockDriverState *base_bs = NULL;
|
1662 |
Error *local_err = NULL;
|
1663 |
|
1664 |
if (!has_on_error) {
|
1665 |
on_error = BLOCKDEV_ON_ERROR_REPORT; |
1666 |
} |
1667 |
|
1668 |
bs = bdrv_find(device); |
1669 |
if (!bs) {
|
1670 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1671 |
return;
|
1672 |
} |
1673 |
|
1674 |
if (base) {
|
1675 |
base_bs = bdrv_find_backing_image(bs, base); |
1676 |
if (base_bs == NULL) { |
1677 |
error_set(errp, QERR_BASE_NOT_FOUND, base); |
1678 |
return;
|
1679 |
} |
1680 |
} |
1681 |
|
1682 |
stream_start(bs, base_bs, base, has_speed ? speed : 0,
|
1683 |
on_error, block_job_cb, bs, &local_err); |
1684 |
if (error_is_set(&local_err)) {
|
1685 |
error_propagate(errp, local_err); |
1686 |
return;
|
1687 |
} |
1688 |
|
1689 |
trace_qmp_block_stream(bs, bs->job); |
1690 |
} |
1691 |
|
1692 |
void qmp_block_commit(const char *device, |
1693 |
bool has_base, const char *base, const char *top, |
1694 |
bool has_speed, int64_t speed,
|
1695 |
Error **errp) |
1696 |
{ |
1697 |
BlockDriverState *bs; |
1698 |
BlockDriverState *base_bs, *top_bs; |
1699 |
Error *local_err = NULL;
|
1700 |
/* This will be part of the QMP command, if/when the
|
1701 |
* BlockdevOnError change for blkmirror makes it in
|
1702 |
*/
|
1703 |
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
1704 |
|
1705 |
/* drain all i/o before commits */
|
1706 |
bdrv_drain_all(); |
1707 |
|
1708 |
bs = bdrv_find(device); |
1709 |
if (!bs) {
|
1710 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1711 |
return;
|
1712 |
} |
1713 |
|
1714 |
/* default top_bs is the active layer */
|
1715 |
top_bs = bs; |
1716 |
|
1717 |
if (top) {
|
1718 |
if (strcmp(bs->filename, top) != 0) { |
1719 |
top_bs = bdrv_find_backing_image(bs, top); |
1720 |
} |
1721 |
} |
1722 |
|
1723 |
if (top_bs == NULL) { |
1724 |
error_setg(errp, "Top image file %s not found", top ? top : "NULL"); |
1725 |
return;
|
1726 |
} |
1727 |
|
1728 |
if (has_base && base) {
|
1729 |
base_bs = bdrv_find_backing_image(top_bs, base); |
1730 |
} else {
|
1731 |
base_bs = bdrv_find_base(top_bs); |
1732 |
} |
1733 |
|
1734 |
if (base_bs == NULL) { |
1735 |
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
1736 |
return;
|
1737 |
} |
1738 |
|
1739 |
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, |
1740 |
&local_err); |
1741 |
if (local_err != NULL) { |
1742 |
error_propagate(errp, local_err); |
1743 |
return;
|
1744 |
} |
1745 |
} |
1746 |
|
1747 |
void qmp_drive_backup(const char *device, const char *target, |
1748 |
bool has_format, const char *format, |
1749 |
enum MirrorSyncMode sync,
|
1750 |
bool has_mode, enum NewImageMode mode, |
1751 |
bool has_speed, int64_t speed,
|
1752 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1753 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1754 |
Error **errp) |
1755 |
{ |
1756 |
BlockDriverState *bs; |
1757 |
BlockDriverState *target_bs; |
1758 |
BlockDriverState *source = NULL;
|
1759 |
BlockDriver *drv = NULL;
|
1760 |
Error *local_err = NULL;
|
1761 |
int flags;
|
1762 |
int64_t size; |
1763 |
int ret;
|
1764 |
|
1765 |
if (!has_speed) {
|
1766 |
speed = 0;
|
1767 |
} |
1768 |
if (!has_on_source_error) {
|
1769 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1770 |
} |
1771 |
if (!has_on_target_error) {
|
1772 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1773 |
} |
1774 |
if (!has_mode) {
|
1775 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1776 |
} |
1777 |
|
1778 |
bs = bdrv_find(device); |
1779 |
if (!bs) {
|
1780 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1781 |
return;
|
1782 |
} |
1783 |
|
1784 |
if (!bdrv_is_inserted(bs)) {
|
1785 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1786 |
return;
|
1787 |
} |
1788 |
|
1789 |
if (!has_format) {
|
1790 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1791 |
} |
1792 |
if (format) {
|
1793 |
drv = bdrv_find_format(format); |
1794 |
if (!drv) {
|
1795 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1796 |
return;
|
1797 |
} |
1798 |
} |
1799 |
|
1800 |
if (bdrv_in_use(bs)) {
|
1801 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1802 |
return;
|
1803 |
} |
1804 |
|
1805 |
flags = bs->open_flags | BDRV_O_RDWR; |
1806 |
|
1807 |
/* See if we have a backing HD we can use to create our new image
|
1808 |
* on top of. */
|
1809 |
if (sync == MIRROR_SYNC_MODE_TOP) {
|
1810 |
source = bs->backing_hd; |
1811 |
if (!source) {
|
1812 |
sync = MIRROR_SYNC_MODE_FULL; |
1813 |
} |
1814 |
} |
1815 |
if (sync == MIRROR_SYNC_MODE_NONE) {
|
1816 |
source = bs; |
1817 |
} |
1818 |
|
1819 |
size = bdrv_getlength(bs); |
1820 |
if (size < 0) { |
1821 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
1822 |
return;
|
1823 |
} |
1824 |
|
1825 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
1826 |
assert(format && drv); |
1827 |
if (source) {
|
1828 |
bdrv_img_create(target, format, source->filename, |
1829 |
source->drv->format_name, NULL,
|
1830 |
size, flags, &local_err, false);
|
1831 |
} else {
|
1832 |
bdrv_img_create(target, format, NULL, NULL, NULL, |
1833 |
size, flags, &local_err, false);
|
1834 |
} |
1835 |
} |
1836 |
|
1837 |
if (error_is_set(&local_err)) {
|
1838 |
error_propagate(errp, local_err); |
1839 |
return;
|
1840 |
} |
1841 |
|
1842 |
target_bs = bdrv_new("");
|
1843 |
ret = bdrv_open(target_bs, target, NULL, flags, drv, &local_err);
|
1844 |
if (ret < 0) { |
1845 |
bdrv_unref(target_bs); |
1846 |
error_propagate(errp, local_err); |
1847 |
return;
|
1848 |
} |
1849 |
|
1850 |
backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error, |
1851 |
block_job_cb, bs, &local_err); |
1852 |
if (local_err != NULL) { |
1853 |
bdrv_unref(target_bs); |
1854 |
error_propagate(errp, local_err); |
1855 |
return;
|
1856 |
} |
1857 |
} |
1858 |
|
1859 |
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20) |
1860 |
|
1861 |
void qmp_drive_mirror(const char *device, const char *target, |
1862 |
bool has_format, const char *format, |
1863 |
enum MirrorSyncMode sync,
|
1864 |
bool has_mode, enum NewImageMode mode, |
1865 |
bool has_speed, int64_t speed,
|
1866 |
bool has_granularity, uint32_t granularity,
|
1867 |
bool has_buf_size, int64_t buf_size,
|
1868 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1869 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1870 |
Error **errp) |
1871 |
{ |
1872 |
BlockDriverState *bs; |
1873 |
BlockDriverState *source, *target_bs; |
1874 |
BlockDriver *drv = NULL;
|
1875 |
Error *local_err = NULL;
|
1876 |
int flags;
|
1877 |
int64_t size; |
1878 |
int ret;
|
1879 |
|
1880 |
if (!has_speed) {
|
1881 |
speed = 0;
|
1882 |
} |
1883 |
if (!has_on_source_error) {
|
1884 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1885 |
} |
1886 |
if (!has_on_target_error) {
|
1887 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1888 |
} |
1889 |
if (!has_mode) {
|
1890 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1891 |
} |
1892 |
if (!has_granularity) {
|
1893 |
granularity = 0;
|
1894 |
} |
1895 |
if (!has_buf_size) {
|
1896 |
buf_size = DEFAULT_MIRROR_BUF_SIZE; |
1897 |
} |
1898 |
|
1899 |
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
1900 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1901 |
return;
|
1902 |
} |
1903 |
if (granularity & (granularity - 1)) { |
1904 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1905 |
return;
|
1906 |
} |
1907 |
|
1908 |
bs = bdrv_find(device); |
1909 |
if (!bs) {
|
1910 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1911 |
return;
|
1912 |
} |
1913 |
|
1914 |
if (!bdrv_is_inserted(bs)) {
|
1915 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1916 |
return;
|
1917 |
} |
1918 |
|
1919 |
if (!has_format) {
|
1920 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1921 |
} |
1922 |
if (format) {
|
1923 |
drv = bdrv_find_format(format); |
1924 |
if (!drv) {
|
1925 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1926 |
return;
|
1927 |
} |
1928 |
} |
1929 |
|
1930 |
if (bdrv_in_use(bs)) {
|
1931 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1932 |
return;
|
1933 |
} |
1934 |
|
1935 |
flags = bs->open_flags | BDRV_O_RDWR; |
1936 |
source = bs->backing_hd; |
1937 |
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
1938 |
sync = MIRROR_SYNC_MODE_FULL; |
1939 |
} |
1940 |
|
1941 |
size = bdrv_getlength(bs); |
1942 |
if (size < 0) { |
1943 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
1944 |
return;
|
1945 |
} |
1946 |
|
1947 |
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
|
1948 |
/* create new image w/o backing file */
|
1949 |
assert(format && drv); |
1950 |
bdrv_img_create(target, format, |
1951 |
NULL, NULL, NULL, size, flags, &local_err, false); |
1952 |
} else {
|
1953 |
switch (mode) {
|
1954 |
case NEW_IMAGE_MODE_EXISTING:
|
1955 |
break;
|
1956 |
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
1957 |
/* create new image with backing file */
|
1958 |
bdrv_img_create(target, format, |
1959 |
source->filename, |
1960 |
source->drv->format_name, |
1961 |
NULL, size, flags, &local_err, false); |
1962 |
break;
|
1963 |
default:
|
1964 |
abort(); |
1965 |
} |
1966 |
} |
1967 |
|
1968 |
if (error_is_set(&local_err)) {
|
1969 |
error_propagate(errp, local_err); |
1970 |
return;
|
1971 |
} |
1972 |
|
1973 |
/* Mirroring takes care of copy-on-write using the source's backing
|
1974 |
* file.
|
1975 |
*/
|
1976 |
target_bs = bdrv_new("");
|
1977 |
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv,
|
1978 |
&local_err); |
1979 |
if (ret < 0) { |
1980 |
bdrv_unref(target_bs); |
1981 |
error_propagate(errp, local_err); |
1982 |
return;
|
1983 |
} |
1984 |
|
1985 |
mirror_start(bs, target_bs, speed, granularity, buf_size, sync, |
1986 |
on_source_error, on_target_error, |
1987 |
block_job_cb, bs, &local_err); |
1988 |
if (local_err != NULL) { |
1989 |
bdrv_unref(target_bs); |
1990 |
error_propagate(errp, local_err); |
1991 |
return;
|
1992 |
} |
1993 |
} |
1994 |
|
1995 |
static BlockJob *find_block_job(const char *device) |
1996 |
{ |
1997 |
BlockDriverState *bs; |
1998 |
|
1999 |
bs = bdrv_find(device); |
2000 |
if (!bs || !bs->job) {
|
2001 |
return NULL; |
2002 |
} |
2003 |
return bs->job;
|
2004 |
} |
2005 |
|
2006 |
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
2007 |
{ |
2008 |
BlockJob *job = find_block_job(device); |
2009 |
|
2010 |
if (!job) {
|
2011 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2012 |
return;
|
2013 |
} |
2014 |
|
2015 |
block_job_set_speed(job, speed, errp); |
2016 |
} |
2017 |
|
2018 |
void qmp_block_job_cancel(const char *device, |
2019 |
bool has_force, bool force, Error **errp) |
2020 |
{ |
2021 |
BlockJob *job = find_block_job(device); |
2022 |
|
2023 |
if (!has_force) {
|
2024 |
force = false;
|
2025 |
} |
2026 |
|
2027 |
if (!job) {
|
2028 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2029 |
return;
|
2030 |
} |
2031 |
if (job->paused && !force) {
|
2032 |
error_set(errp, QERR_BLOCK_JOB_PAUSED, device); |
2033 |
return;
|
2034 |
} |
2035 |
|
2036 |
trace_qmp_block_job_cancel(job); |
2037 |
block_job_cancel(job); |
2038 |
} |
2039 |
|
2040 |
void qmp_block_job_pause(const char *device, Error **errp) |
2041 |
{ |
2042 |
BlockJob *job = find_block_job(device); |
2043 |
|
2044 |
if (!job) {
|
2045 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2046 |
return;
|
2047 |
} |
2048 |
|
2049 |
trace_qmp_block_job_pause(job); |
2050 |
block_job_pause(job); |
2051 |
} |
2052 |
|
2053 |
void qmp_block_job_resume(const char *device, Error **errp) |
2054 |
{ |
2055 |
BlockJob *job = find_block_job(device); |
2056 |
|
2057 |
if (!job) {
|
2058 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2059 |
return;
|
2060 |
} |
2061 |
|
2062 |
trace_qmp_block_job_resume(job); |
2063 |
block_job_resume(job); |
2064 |
} |
2065 |
|
2066 |
void qmp_block_job_complete(const char *device, Error **errp) |
2067 |
{ |
2068 |
BlockJob *job = find_block_job(device); |
2069 |
|
2070 |
if (!job) {
|
2071 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2072 |
return;
|
2073 |
} |
2074 |
|
2075 |
trace_qmp_block_job_complete(job); |
2076 |
block_job_complete(job, errp); |
2077 |
} |
2078 |
|
2079 |
void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
|
2080 |
{ |
2081 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
2082 |
QObject *obj; |
2083 |
QDict *qdict; |
2084 |
DriveInfo *dinfo; |
2085 |
Error *local_err = NULL;
|
2086 |
|
2087 |
/* Require an ID in the top level */
|
2088 |
if (!options->has_id) {
|
2089 |
error_setg(errp, "Block device needs an ID");
|
2090 |
goto fail;
|
2091 |
} |
2092 |
|
2093 |
/* TODO Sort it out in raw-posix and drive_init: Reject aio=native with
|
2094 |
* cache.direct=false instead of silently switching to aio=threads, except
|
2095 |
* if called from drive_init.
|
2096 |
*
|
2097 |
* For now, simply forbidding the combination for all drivers will do. */
|
2098 |
if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
|
2099 |
bool direct = options->cache->has_direct && options->cache->direct;
|
2100 |
if (!options->has_cache && !direct) {
|
2101 |
error_setg(errp, "aio=native requires cache.direct=true");
|
2102 |
goto fail;
|
2103 |
} |
2104 |
} |
2105 |
|
2106 |
visit_type_BlockdevOptions(qmp_output_get_visitor(ov), |
2107 |
&options, NULL, &local_err);
|
2108 |
if (error_is_set(&local_err)) {
|
2109 |
error_propagate(errp, local_err); |
2110 |
goto fail;
|
2111 |
} |
2112 |
|
2113 |
obj = qmp_output_get_qobject(ov); |
2114 |
qdict = qobject_to_qdict(obj); |
2115 |
|
2116 |
qdict_flatten(qdict); |
2117 |
|
2118 |
dinfo = blockdev_init(qdict, IF_NONE); |
2119 |
if (!dinfo) {
|
2120 |
error_setg(errp, "Could not open image");
|
2121 |
goto fail;
|
2122 |
} |
2123 |
|
2124 |
fail:
|
2125 |
qmp_output_visitor_cleanup(ov); |
2126 |
} |
2127 |
|
2128 |
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
2129 |
{ |
2130 |
BlockJobInfoList **prev = opaque; |
2131 |
BlockJob *job = bs->job; |
2132 |
|
2133 |
if (job) {
|
2134 |
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
2135 |
elem->value = block_job_query(bs->job); |
2136 |
(*prev)->next = elem; |
2137 |
*prev = elem; |
2138 |
} |
2139 |
} |
2140 |
|
2141 |
BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
2142 |
{ |
2143 |
/* Dummy is a fake list element for holding the head pointer */
|
2144 |
BlockJobInfoList dummy = {}; |
2145 |
BlockJobInfoList *prev = &dummy; |
2146 |
bdrv_iterate(do_qmp_query_block_jobs_one, &prev); |
2147 |
return dummy.next;
|
2148 |
} |
2149 |
|
2150 |
QemuOptsList qemu_common_drive_opts = { |
2151 |
.name = "drive",
|
2152 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
2153 |
.desc = { |
2154 |
{ |
2155 |
.name = "bus",
|
2156 |
.type = QEMU_OPT_NUMBER, |
2157 |
.help = "bus number",
|
2158 |
},{ |
2159 |
.name = "unit",
|
2160 |
.type = QEMU_OPT_NUMBER, |
2161 |
.help = "unit number (i.e. lun for scsi)",
|
2162 |
},{ |
2163 |
.name = "if",
|
2164 |
.type = QEMU_OPT_STRING, |
2165 |
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
2166 |
},{ |
2167 |
.name = "index",
|
2168 |
.type = QEMU_OPT_NUMBER, |
2169 |
.help = "index number",
|
2170 |
},{ |
2171 |
.name = "cyls",
|
2172 |
.type = QEMU_OPT_NUMBER, |
2173 |
.help = "number of cylinders (ide disk geometry)",
|
2174 |
},{ |
2175 |
.name = "heads",
|
2176 |
.type = QEMU_OPT_NUMBER, |
2177 |
.help = "number of heads (ide disk geometry)",
|
2178 |
},{ |
2179 |
.name = "secs",
|
2180 |
.type = QEMU_OPT_NUMBER, |
2181 |
.help = "number of sectors (ide disk geometry)",
|
2182 |
},{ |
2183 |
.name = "trans",
|
2184 |
.type = QEMU_OPT_STRING, |
2185 |
.help = "chs translation (auto, lba. none)",
|
2186 |
},{ |
2187 |
.name = "media",
|
2188 |
.type = QEMU_OPT_STRING, |
2189 |
.help = "media type (disk, cdrom)",
|
2190 |
},{ |
2191 |
.name = "snapshot",
|
2192 |
.type = QEMU_OPT_BOOL, |
2193 |
.help = "enable/disable snapshot mode",
|
2194 |
},{ |
2195 |
.name = "file",
|
2196 |
.type = QEMU_OPT_STRING, |
2197 |
.help = "disk image",
|
2198 |
},{ |
2199 |
.name = "discard",
|
2200 |
.type = QEMU_OPT_STRING, |
2201 |
.help = "discard operation (ignore/off, unmap/on)",
|
2202 |
},{ |
2203 |
.name = "cache.writeback",
|
2204 |
.type = QEMU_OPT_BOOL, |
2205 |
.help = "enables writeback mode for any caches",
|
2206 |
},{ |
2207 |
.name = "cache.direct",
|
2208 |
.type = QEMU_OPT_BOOL, |
2209 |
.help = "enables use of O_DIRECT (bypass the host page cache)",
|
2210 |
},{ |
2211 |
.name = "cache.no-flush",
|
2212 |
.type = QEMU_OPT_BOOL, |
2213 |
.help = "ignore any flush requests for the device",
|
2214 |
},{ |
2215 |
.name = "aio",
|
2216 |
.type = QEMU_OPT_STRING, |
2217 |
.help = "host AIO implementation (threads, native)",
|
2218 |
},{ |
2219 |
.name = "format",
|
2220 |
.type = QEMU_OPT_STRING, |
2221 |
.help = "disk format (raw, qcow2, ...)",
|
2222 |
},{ |
2223 |
.name = "serial",
|
2224 |
.type = QEMU_OPT_STRING, |
2225 |
.help = "disk serial number",
|
2226 |
},{ |
2227 |
.name = "rerror",
|
2228 |
.type = QEMU_OPT_STRING, |
2229 |
.help = "read error action",
|
2230 |
},{ |
2231 |
.name = "werror",
|
2232 |
.type = QEMU_OPT_STRING, |
2233 |
.help = "write error action",
|
2234 |
},{ |
2235 |
.name = "addr",
|
2236 |
.type = QEMU_OPT_STRING, |
2237 |
.help = "pci address (virtio only)",
|
2238 |
},{ |
2239 |
.name = "read-only",
|
2240 |
.type = QEMU_OPT_BOOL, |
2241 |
.help = "open drive file as read-only",
|
2242 |
},{ |
2243 |
.name = "throttling.iops-total",
|
2244 |
.type = QEMU_OPT_NUMBER, |
2245 |
.help = "limit total I/O operations per second",
|
2246 |
},{ |
2247 |
.name = "throttling.iops-read",
|
2248 |
.type = QEMU_OPT_NUMBER, |
2249 |
.help = "limit read operations per second",
|
2250 |
},{ |
2251 |
.name = "throttling.iops-write",
|
2252 |
.type = QEMU_OPT_NUMBER, |
2253 |
.help = "limit write operations per second",
|
2254 |
},{ |
2255 |
.name = "throttling.bps-total",
|
2256 |
.type = QEMU_OPT_NUMBER, |
2257 |
.help = "limit total bytes per second",
|
2258 |
},{ |
2259 |
.name = "throttling.bps-read",
|
2260 |
.type = QEMU_OPT_NUMBER, |
2261 |
.help = "limit read bytes per second",
|
2262 |
},{ |
2263 |
.name = "throttling.bps-write",
|
2264 |
.type = QEMU_OPT_NUMBER, |
2265 |
.help = "limit write bytes per second",
|
2266 |
},{ |
2267 |
.name = "throttling.iops-total-max",
|
2268 |
.type = QEMU_OPT_NUMBER, |
2269 |
.help = "I/O operations burst",
|
2270 |
},{ |
2271 |
.name = "throttling.iops-read-max",
|
2272 |
.type = QEMU_OPT_NUMBER, |
2273 |
.help = "I/O operations read burst",
|
2274 |
},{ |
2275 |
.name = "throttling.iops-write-max",
|
2276 |
.type = QEMU_OPT_NUMBER, |
2277 |
.help = "I/O operations write burst",
|
2278 |
},{ |
2279 |
.name = "throttling.bps-total-max",
|
2280 |
.type = QEMU_OPT_NUMBER, |
2281 |
.help = "total bytes burst",
|
2282 |
},{ |
2283 |
.name = "throttling.bps-read-max",
|
2284 |
.type = QEMU_OPT_NUMBER, |
2285 |
.help = "total bytes read burst",
|
2286 |
},{ |
2287 |
.name = "throttling.bps-write-max",
|
2288 |
.type = QEMU_OPT_NUMBER, |
2289 |
.help = "total bytes write burst",
|
2290 |
},{ |
2291 |
.name = "throttling.iops-size",
|
2292 |
.type = QEMU_OPT_NUMBER, |
2293 |
.help = "when limiting by iops max size of an I/O in bytes",
|
2294 |
},{ |
2295 |
.name = "copy-on-read",
|
2296 |
.type = QEMU_OPT_BOOL, |
2297 |
.help = "copy read data from backing file into image file",
|
2298 |
},{ |
2299 |
.name = "boot",
|
2300 |
.type = QEMU_OPT_BOOL, |
2301 |
.help = "(deprecated, ignored)",
|
2302 |
}, |
2303 |
{ /* end of list */ }
|
2304 |
}, |
2305 |
}; |
2306 |
|
2307 |
QemuOptsList qemu_drive_opts = { |
2308 |
.name = "drive",
|
2309 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), |
2310 |
.desc = { |
2311 |
/*
|
2312 |
* no elements => accept any params
|
2313 |
* validation will happen later
|
2314 |
*/
|
2315 |
{ /* end of list */ }
|
2316 |
}, |
2317 |
}; |