mirror of
https://github.com/qemu/qemu.git
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0eef407c7b
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Kevin Wolf <kwolf@redhat.com>
1857 lines
52 KiB
C
1857 lines
52 KiB
C
/*
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* QEMU host block devices
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysemu/blockdev.h"
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#include "hw/block/block.h"
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#include "block/blockjob.h"
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#include "monitor/monitor.h"
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#include "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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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_delete(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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DriveInfo *dinfo;
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} DrivePutRefBH;
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static void drive_put_ref_bh(void *opaque)
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{
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DrivePutRefBH *s = opaque;
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drive_put_ref(s->dinfo);
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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 drive reference in a BH
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*
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* It is not possible to use drive_put_ref() from a callback function when the
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* callers still need the drive. In such cases we schedule a BH to release the
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* reference.
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*/
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static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
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{
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DrivePutRefBH *s;
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s = g_new(DrivePutRefBH, 1);
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s->bh = qemu_bh_new(drive_put_ref_bh, s);
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s->dinfo = dinfo;
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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 do_check_io_limits(BlockIOLimit *io_limits, Error **errp)
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{
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bool bps_flag;
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bool iops_flag;
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assert(io_limits);
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bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
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&& ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
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|| (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
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iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
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&& ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
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|| (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
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if (bps_flag || iops_flag) {
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error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
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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 (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 ||
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io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 ||
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io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 ||
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io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 ||
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io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 ||
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io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) {
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error_setg(errp, "bps and iops 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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DriveInfo *drive_init(QemuOpts *all_opts, 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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BlockDriver *drv = NULL;
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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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BlockIOLimit io_limits;
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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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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;
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}
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bs_opts = qdict_new();
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qemu_opts_to_qdict(all_opts, bs_opts);
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qemu_opts_absorb_qdict(opts, bs_opts, &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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}
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if (id) {
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qdict_del(bs_opts, "id");
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}
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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);
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index = qemu_opt_get_number(opts, "index", -1);
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cyls = qemu_opt_get_number(opts, "cyls", 0);
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heads = qemu_opt_get_number(opts, "heads", 0);
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secs = qemu_opt_get_number(opts, "secs", 0);
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snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
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ro = qemu_opt_get_bool(opts, "readonly", 0);
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copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
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file = qemu_opt_get(opts, "file");
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serial = qemu_opt_get(opts, "serial");
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if ((buf = qemu_opt_get(opts, "if")) != NULL) {
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for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
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;
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if (type == IF_COUNT) {
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error_report("unsupported bus type '%s'", buf);
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return NULL;
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}
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} else {
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type = block_default_type;
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}
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max_devs = if_max_devs[type];
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if (cyls || heads || secs) {
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if (cyls < 1) {
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error_report("invalid physical cyls number");
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return NULL;
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}
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if (heads < 1) {
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error_report("invalid physical heads number");
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return NULL;
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}
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if (secs < 1) {
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error_report("invalid physical secs number");
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return NULL;
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}
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}
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if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
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if (!cyls) {
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error_report("'%s' trans must be used with cyls, heads and secs",
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buf);
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return NULL;
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}
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if (!strcmp(buf, "none"))
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translation = BIOS_ATA_TRANSLATION_NONE;
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else if (!strcmp(buf, "lba"))
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translation = BIOS_ATA_TRANSLATION_LBA;
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else if (!strcmp(buf, "auto"))
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translation = BIOS_ATA_TRANSLATION_AUTO;
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else {
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error_report("'%s' invalid translation type", buf);
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return NULL;
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}
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}
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if ((buf = qemu_opt_get(opts, "media")) != NULL) {
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if (!strcmp(buf, "disk")) {
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media = MEDIA_DISK;
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} else if (!strcmp(buf, "cdrom")) {
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if (cyls || secs || heads) {
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error_report("CHS can't be set with media=%s", buf);
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return NULL;
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}
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media = MEDIA_CDROM;
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} else {
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error_report("'%s' invalid media", buf);
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return NULL;
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}
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}
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if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
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if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
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error_report("invalid discard option");
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return NULL;
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}
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}
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bdrv_flags |= BDRV_O_CACHE_WB;
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if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
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if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) {
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error_report("invalid cache option");
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return NULL;
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}
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}
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|
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#ifdef CONFIG_LINUX_AIO
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if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
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if (!strcmp(buf, "native")) {
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bdrv_flags |= BDRV_O_NATIVE_AIO;
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} else if (!strcmp(buf, "threads")) {
|
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/* this is the default */
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} else {
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error_report("invalid aio option");
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return NULL;
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}
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}
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#endif
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if ((buf = qemu_opt_get(opts, "format")) != NULL) {
|
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if (is_help_option(buf)) {
|
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error_printf("Supported formats:");
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bdrv_iterate_format(bdrv_format_print, NULL);
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error_printf("\n");
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return NULL;
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}
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drv = bdrv_find_whitelisted_format(buf, ro);
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if (!drv) {
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error_report("'%s' invalid format", buf);
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return NULL;
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}
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}
|
|
|
|
/* disk I/O throttling */
|
|
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
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qemu_opt_get_number(opts, "bps", 0);
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|
io_limits.bps[BLOCK_IO_LIMIT_READ] =
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qemu_opt_get_number(opts, "bps_rd", 0);
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|
io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
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qemu_opt_get_number(opts, "bps_wr", 0);
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io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
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qemu_opt_get_number(opts, "iops", 0);
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io_limits.iops[BLOCK_IO_LIMIT_READ] =
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qemu_opt_get_number(opts, "iops_rd", 0);
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io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
|
|
qemu_opt_get_number(opts, "iops_wr", 0);
|
|
|
|
if (!do_check_io_limits(&io_limits, &error)) {
|
|
error_report("%s", error_get_pretty(error));
|
|
error_free(error);
|
|
return NULL;
|
|
}
|
|
|
|
if (qemu_opt_get(opts, "boot") != NULL) {
|
|
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
|
"ignored. Future versions will reject this parameter. Please "
|
|
"update your scripts.\n");
|
|
}
|
|
|
|
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
|
|
if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
|
|
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
|
error_report("werror is not supported by this bus type");
|
|
return NULL;
|
|
}
|
|
|
|
on_write_error = parse_block_error_action(buf, 0);
|
|
if (on_write_error < 0) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
on_read_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
|
|
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
|
error_report("rerror is not supported by this bus type");
|
|
return NULL;
|
|
}
|
|
|
|
on_read_error = parse_block_error_action(buf, 1);
|
|
if (on_read_error < 0) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
|
|
if (type != IF_VIRTIO) {
|
|
error_report("addr is not supported by this bus type");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* compute bus and unit according index */
|
|
|
|
if (index != -1) {
|
|
if (bus_id != 0 || unit_id != -1) {
|
|
error_report("index cannot be used with bus and unit");
|
|
return NULL;
|
|
}
|
|
bus_id = drive_index_to_bus_id(type, index);
|
|
unit_id = drive_index_to_unit_id(type, index);
|
|
}
|
|
|
|
/* if user doesn't specify a unit_id,
|
|
* try to find the first free
|
|
*/
|
|
|
|
if (unit_id == -1) {
|
|
unit_id = 0;
|
|
while (drive_get(type, bus_id, unit_id) != NULL) {
|
|
unit_id++;
|
|
if (max_devs && unit_id >= max_devs) {
|
|
unit_id -= max_devs;
|
|
bus_id++;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* check unit id */
|
|
|
|
if (max_devs && unit_id >= max_devs) {
|
|
error_report("unit %d too big (max is %d)",
|
|
unit_id, max_devs - 1);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* catch multiple definitions
|
|
*/
|
|
|
|
if (drive_get(type, bus_id, unit_id) != NULL) {
|
|
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
|
bus_id, unit_id, index);
|
|
return NULL;
|
|
}
|
|
|
|
/* init */
|
|
|
|
dinfo = g_malloc0(sizeof(*dinfo));
|
|
if ((buf = qemu_opts_id(opts)) != NULL) {
|
|
dinfo->id = g_strdup(buf);
|
|
} else {
|
|
/* no id supplied -> create one */
|
|
dinfo->id = g_malloc0(32);
|
|
if (type == IF_IDE || type == IF_SCSI)
|
|
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
|
|
if (max_devs)
|
|
snprintf(dinfo->id, 32, "%s%i%s%i",
|
|
if_name[type], bus_id, mediastr, unit_id);
|
|
else
|
|
snprintf(dinfo->id, 32, "%s%s%i",
|
|
if_name[type], mediastr, unit_id);
|
|
}
|
|
dinfo->bdrv = bdrv_new(dinfo->id);
|
|
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
|
dinfo->bdrv->read_only = ro;
|
|
dinfo->devaddr = devaddr;
|
|
dinfo->type = type;
|
|
dinfo->bus = bus_id;
|
|
dinfo->unit = unit_id;
|
|
dinfo->cyls = cyls;
|
|
dinfo->heads = heads;
|
|
dinfo->secs = secs;
|
|
dinfo->trans = translation;
|
|
dinfo->opts = all_opts;
|
|
dinfo->refcount = 1;
|
|
if (serial != NULL) {
|
|
dinfo->serial = g_strdup(serial);
|
|
}
|
|
QTAILQ_INSERT_TAIL(&drives, dinfo, next);
|
|
|
|
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
|
|
|
|
/* disk I/O throttling */
|
|
bdrv_set_io_limits(dinfo->bdrv, &io_limits);
|
|
|
|
switch(type) {
|
|
case IF_IDE:
|
|
case IF_SCSI:
|
|
case IF_XEN:
|
|
case IF_NONE:
|
|
dinfo->media_cd = media == MEDIA_CDROM;
|
|
break;
|
|
case IF_SD:
|
|
case IF_FLOPPY:
|
|
case IF_PFLASH:
|
|
case IF_MTD:
|
|
break;
|
|
case IF_VIRTIO:
|
|
{
|
|
/* add virtio block device */
|
|
QemuOpts *devopts;
|
|
devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
|
|
if (arch_type == QEMU_ARCH_S390X) {
|
|
qemu_opt_set(devopts, "driver", "virtio-blk-s390");
|
|
} else {
|
|
qemu_opt_set(devopts, "driver", "virtio-blk-pci");
|
|
}
|
|
qemu_opt_set(devopts, "drive", dinfo->id);
|
|
if (devaddr)
|
|
qemu_opt_set(devopts, "addr", devaddr);
|
|
break;
|
|
}
|
|
default:
|
|
abort();
|
|
}
|
|
if (!file || !*file) {
|
|
if (qdict_size(bs_opts)) {
|
|
file = NULL;
|
|
} else {
|
|
return dinfo;
|
|
}
|
|
}
|
|
if (snapshot) {
|
|
/* always use cache=unsafe with snapshot */
|
|
bdrv_flags &= ~BDRV_O_CACHE_MASK;
|
|
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
|
|
}
|
|
|
|
if (copy_on_read) {
|
|
bdrv_flags |= BDRV_O_COPY_ON_READ;
|
|
}
|
|
|
|
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
|
bdrv_flags |= BDRV_O_INCOMING;
|
|
}
|
|
|
|
if (media == MEDIA_CDROM) {
|
|
/* CDROM is fine for any interface, don't check. */
|
|
ro = 1;
|
|
} else if (ro == 1) {
|
|
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
|
|
type != IF_NONE && type != IF_PFLASH) {
|
|
error_report("readonly not supported by this bus type");
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
|
|
|
if (ro && copy_on_read) {
|
|
error_report("warning: disabling copy_on_read on readonly drive");
|
|
}
|
|
|
|
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv);
|
|
bs_opts = NULL;
|
|
|
|
if (ret < 0) {
|
|
if (ret == -EMEDIUMTYPE) {
|
|
error_report("could not open disk image %s: not in %s format",
|
|
file ?: dinfo->id, drv->format_name);
|
|
} else {
|
|
error_report("could not open disk image %s: %s",
|
|
file ?: dinfo->id, strerror(-ret));
|
|
}
|
|
goto err;
|
|
}
|
|
|
|
if (bdrv_key_required(dinfo->bdrv))
|
|
autostart = 0;
|
|
|
|
qemu_opts_del(opts);
|
|
|
|
return dinfo;
|
|
|
|
err:
|
|
qemu_opts_del(opts);
|
|
QDECREF(bs_opts);
|
|
bdrv_delete(dinfo->bdrv);
|
|
g_free(dinfo->id);
|
|
QTAILQ_REMOVE(&drives, dinfo, next);
|
|
g_free(dinfo);
|
|
return NULL;
|
|
}
|
|
|
|
void do_commit(Monitor *mon, const QDict *qdict)
|
|
{
|
|
const char *device = qdict_get_str(qdict, "device");
|
|
BlockDriverState *bs;
|
|
int ret;
|
|
|
|
if (!strcmp(device, "all")) {
|
|
ret = bdrv_commit_all();
|
|
} else {
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
monitor_printf(mon, "Device '%s' not found\n", device);
|
|
return;
|
|
}
|
|
ret = bdrv_commit(bs);
|
|
}
|
|
if (ret < 0) {
|
|
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
|
|
strerror(-ret));
|
|
}
|
|
}
|
|
|
|
static void blockdev_do_action(int kind, void *data, Error **errp)
|
|
{
|
|
TransactionAction action;
|
|
TransactionActionList list;
|
|
|
|
action.kind = kind;
|
|
action.data = data;
|
|
list.value = &action;
|
|
list.next = NULL;
|
|
qmp_transaction(&list, errp);
|
|
}
|
|
|
|
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
|
|
bool has_format, const char *format,
|
|
bool has_mode, enum NewImageMode mode,
|
|
Error **errp)
|
|
{
|
|
BlockdevSnapshot snapshot = {
|
|
.device = (char *) device,
|
|
.snapshot_file = (char *) snapshot_file,
|
|
.has_format = has_format,
|
|
.format = (char *) format,
|
|
.has_mode = has_mode,
|
|
.mode = mode,
|
|
};
|
|
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
|
|
&snapshot, errp);
|
|
}
|
|
|
|
|
|
/* New and old BlockDriverState structs for group snapshots */
|
|
|
|
typedef struct BlkTransactionStates BlkTransactionStates;
|
|
|
|
/* Only prepare() may fail. In a single transaction, only one of commit() or
|
|
abort() will be called, clean() will always be called if it present. */
|
|
typedef struct BdrvActionOps {
|
|
/* Size of state struct, in bytes. */
|
|
size_t instance_size;
|
|
/* Prepare the work, must NOT be NULL. */
|
|
void (*prepare)(BlkTransactionStates *common, Error **errp);
|
|
/* Commit the changes, must NOT be NULL. */
|
|
void (*commit)(BlkTransactionStates *common);
|
|
/* Abort the changes on fail, can be NULL. */
|
|
void (*abort)(BlkTransactionStates *common);
|
|
/* Clean up resource in the end, can be NULL. */
|
|
void (*clean)(BlkTransactionStates *common);
|
|
} BdrvActionOps;
|
|
|
|
/*
|
|
* This structure must be arranged as first member in child type, assuming
|
|
* that compiler will also arrange it to the same address with parent instance.
|
|
* Later it will be used in free().
|
|
*/
|
|
struct BlkTransactionStates {
|
|
TransactionAction *action;
|
|
const BdrvActionOps *ops;
|
|
QSIMPLEQ_ENTRY(BlkTransactionStates) entry;
|
|
};
|
|
|
|
/* external snapshot private data */
|
|
typedef struct ExternalSnapshotStates {
|
|
BlkTransactionStates common;
|
|
BlockDriverState *old_bs;
|
|
BlockDriverState *new_bs;
|
|
} ExternalSnapshotStates;
|
|
|
|
static void external_snapshot_prepare(BlkTransactionStates *common,
|
|
Error **errp)
|
|
{
|
|
BlockDriver *proto_drv;
|
|
BlockDriver *drv;
|
|
int flags, ret;
|
|
Error *local_err = NULL;
|
|
const char *device;
|
|
const char *new_image_file;
|
|
const char *format = "qcow2";
|
|
enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
ExternalSnapshotStates *states =
|
|
DO_UPCAST(ExternalSnapshotStates, common, common);
|
|
TransactionAction *action = common->action;
|
|
|
|
/* get parameters */
|
|
g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
|
|
|
|
device = action->blockdev_snapshot_sync->device;
|
|
new_image_file = action->blockdev_snapshot_sync->snapshot_file;
|
|
if (action->blockdev_snapshot_sync->has_format) {
|
|
format = action->blockdev_snapshot_sync->format;
|
|
}
|
|
if (action->blockdev_snapshot_sync->has_mode) {
|
|
mode = action->blockdev_snapshot_sync->mode;
|
|
}
|
|
|
|
/* start processing */
|
|
drv = bdrv_find_format(format);
|
|
if (!drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
|
|
states->old_bs = bdrv_find(device);
|
|
if (!states->old_bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_inserted(states->old_bs)) {
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
return;
|
|
}
|
|
|
|
if (bdrv_in_use(states->old_bs)) {
|
|
error_set(errp, QERR_DEVICE_IN_USE, device);
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_read_only(states->old_bs)) {
|
|
if (bdrv_flush(states->old_bs)) {
|
|
error_set(errp, QERR_IO_ERROR);
|
|
return;
|
|
}
|
|
}
|
|
|
|
flags = states->old_bs->open_flags;
|
|
|
|
proto_drv = bdrv_find_protocol(new_image_file);
|
|
if (!proto_drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
|
|
/* create new image w/backing file */
|
|
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
|
bdrv_img_create(new_image_file, format,
|
|
states->old_bs->filename,
|
|
states->old_bs->drv->format_name,
|
|
NULL, -1, flags, &local_err, false);
|
|
if (error_is_set(&local_err)) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* We will manually add the backing_hd field to the bs later */
|
|
states->new_bs = bdrv_new("");
|
|
/* TODO Inherit bs->options or only take explicit options with an
|
|
* extended QMP command? */
|
|
ret = bdrv_open(states->new_bs, new_image_file, NULL,
|
|
flags | BDRV_O_NO_BACKING, drv);
|
|
if (ret != 0) {
|
|
error_setg_file_open(errp, -ret, new_image_file);
|
|
}
|
|
}
|
|
|
|
static void external_snapshot_commit(BlkTransactionStates *common)
|
|
{
|
|
ExternalSnapshotStates *states =
|
|
DO_UPCAST(ExternalSnapshotStates, common, common);
|
|
|
|
/* This removes our old bs from the bdrv_states, and adds the new bs */
|
|
bdrv_append(states->new_bs, states->old_bs);
|
|
/* We don't need (or want) to use the transactional
|
|
* bdrv_reopen_multiple() across all the entries at once, because we
|
|
* don't want to abort all of them if one of them fails the reopen */
|
|
bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR,
|
|
NULL);
|
|
}
|
|
|
|
static void external_snapshot_abort(BlkTransactionStates *common)
|
|
{
|
|
ExternalSnapshotStates *states =
|
|
DO_UPCAST(ExternalSnapshotStates, common, common);
|
|
if (states->new_bs) {
|
|
bdrv_delete(states->new_bs);
|
|
}
|
|
}
|
|
|
|
static const BdrvActionOps actions[] = {
|
|
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
|
|
.instance_size = sizeof(ExternalSnapshotStates),
|
|
.prepare = external_snapshot_prepare,
|
|
.commit = external_snapshot_commit,
|
|
.abort = external_snapshot_abort,
|
|
},
|
|
};
|
|
|
|
/*
|
|
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
|
* then we do not pivot any of the devices in the group, and abandon the
|
|
* snapshots
|
|
*/
|
|
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
|
|
{
|
|
TransactionActionList *dev_entry = dev_list;
|
|
BlkTransactionStates *states, *next;
|
|
Error *local_err = NULL;
|
|
|
|
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states;
|
|
QSIMPLEQ_INIT(&snap_bdrv_states);
|
|
|
|
/* drain all i/o before any snapshots */
|
|
bdrv_drain_all();
|
|
|
|
/* We don't do anything in this loop that commits us to the snapshot */
|
|
while (NULL != dev_entry) {
|
|
TransactionAction *dev_info = NULL;
|
|
const BdrvActionOps *ops;
|
|
|
|
dev_info = dev_entry->value;
|
|
dev_entry = dev_entry->next;
|
|
|
|
assert(dev_info->kind < ARRAY_SIZE(actions));
|
|
|
|
ops = &actions[dev_info->kind];
|
|
states = g_malloc0(ops->instance_size);
|
|
states->ops = ops;
|
|
states->action = dev_info;
|
|
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry);
|
|
|
|
states->ops->prepare(states, &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
error_propagate(errp, local_err);
|
|
goto delete_and_fail;
|
|
}
|
|
}
|
|
|
|
QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
|
|
states->ops->commit(states);
|
|
}
|
|
|
|
/* success */
|
|
goto exit;
|
|
|
|
delete_and_fail:
|
|
/*
|
|
* failure, and it is all-or-none; abandon each new bs, and keep using
|
|
* the original bs for all images
|
|
*/
|
|
QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
|
|
if (states->ops->abort) {
|
|
states->ops->abort(states);
|
|
}
|
|
}
|
|
exit:
|
|
QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) {
|
|
if (states->ops->clean) {
|
|
states->ops->clean(states);
|
|
}
|
|
g_free(states);
|
|
}
|
|
}
|
|
|
|
|
|
static void eject_device(BlockDriverState *bs, int force, Error **errp)
|
|
{
|
|
if (bdrv_in_use(bs)) {
|
|
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
if (!bdrv_dev_has_removable_media(bs)) {
|
|
error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
|
|
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
|
bdrv_dev_eject_request(bs, force);
|
|
if (!force) {
|
|
error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
|
|
return;
|
|
}
|
|
}
|
|
|
|
bdrv_close(bs);
|
|
}
|
|
|
|
void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
eject_device(bs, force, errp);
|
|
}
|
|
|
|
void qmp_block_passwd(const char *device, const char *password, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
int err;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
err = bdrv_set_key(bs, password);
|
|
if (err == -EINVAL) {
|
|
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
|
|
return;
|
|
} else if (err < 0) {
|
|
error_set(errp, QERR_INVALID_PASSWORD);
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
|
|
int bdrv_flags, BlockDriver *drv,
|
|
const char *password, Error **errp)
|
|
{
|
|
int ret;
|
|
|
|
ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv);
|
|
if (ret < 0) {
|
|
error_setg_file_open(errp, -ret, filename);
|
|
return;
|
|
}
|
|
|
|
if (bdrv_key_required(bs)) {
|
|
if (password) {
|
|
if (bdrv_set_key(bs, password) < 0) {
|
|
error_set(errp, QERR_INVALID_PASSWORD);
|
|
}
|
|
} else {
|
|
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
|
|
bdrv_get_encrypted_filename(bs));
|
|
}
|
|
} else if (password) {
|
|
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
|
|
}
|
|
}
|
|
|
|
void qmp_change_blockdev(const char *device, const char *filename,
|
|
bool has_format, const char *format, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriver *drv = NULL;
|
|
int bdrv_flags;
|
|
Error *err = NULL;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (format) {
|
|
drv = bdrv_find_whitelisted_format(format, bs->read_only);
|
|
if (!drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
}
|
|
|
|
eject_device(bs, 0, &err);
|
|
if (error_is_set(&err)) {
|
|
error_propagate(errp, err);
|
|
return;
|
|
}
|
|
|
|
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
|
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
|
|
|
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
|
}
|
|
|
|
/* throttling disk I/O limits */
|
|
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
|
|
int64_t bps_wr, int64_t iops, int64_t iops_rd,
|
|
int64_t iops_wr, Error **errp)
|
|
{
|
|
BlockIOLimit io_limits;
|
|
BlockDriverState *bs;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
|
|
io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
|
|
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
|
|
io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
|
|
io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
|
|
io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
|
|
|
|
if (!do_check_io_limits(&io_limits, errp)) {
|
|
return;
|
|
}
|
|
|
|
bs->io_limits = io_limits;
|
|
|
|
if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
|
|
bdrv_io_limits_enable(bs);
|
|
} else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
|
|
bdrv_io_limits_disable(bs);
|
|
} else {
|
|
if (bs->block_timer) {
|
|
qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock));
|
|
}
|
|
}
|
|
}
|
|
|
|
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
|
{
|
|
const char *id = qdict_get_str(qdict, "id");
|
|
BlockDriverState *bs;
|
|
|
|
bs = bdrv_find(id);
|
|
if (!bs) {
|
|
qerror_report(QERR_DEVICE_NOT_FOUND, id);
|
|
return -1;
|
|
}
|
|
if (bdrv_in_use(bs)) {
|
|
qerror_report(QERR_DEVICE_IN_USE, id);
|
|
return -1;
|
|
}
|
|
|
|
/* quiesce block driver; prevent further io */
|
|
bdrv_drain_all();
|
|
bdrv_flush(bs);
|
|
bdrv_close(bs);
|
|
|
|
/* if we have a device attached to this BlockDriverState
|
|
* then we need to make the drive anonymous until the device
|
|
* can be removed. If this is a drive with no device backing
|
|
* then we can just get rid of the block driver state right here.
|
|
*/
|
|
if (bdrv_get_attached_dev(bs)) {
|
|
bdrv_make_anon(bs);
|
|
|
|
/* Further I/O must not pause the guest */
|
|
bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
|
|
BLOCKDEV_ON_ERROR_REPORT);
|
|
} else {
|
|
drive_uninit(drive_get_by_blockdev(bs));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void qmp_block_resize(const char *device, int64_t size, Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
int ret;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (size < 0) {
|
|
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
|
|
return;
|
|
}
|
|
|
|
/* complete all in-flight operations before resizing the device */
|
|
bdrv_drain_all();
|
|
|
|
ret = bdrv_truncate(bs, size);
|
|
switch (ret) {
|
|
case 0:
|
|
break;
|
|
case -ENOMEDIUM:
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
break;
|
|
case -ENOTSUP:
|
|
error_set(errp, QERR_UNSUPPORTED);
|
|
break;
|
|
case -EACCES:
|
|
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
|
|
break;
|
|
case -EBUSY:
|
|
error_set(errp, QERR_DEVICE_IN_USE, device);
|
|
break;
|
|
default:
|
|
error_setg_errno(errp, -ret, "Could not resize");
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void block_job_cb(void *opaque, int ret)
|
|
{
|
|
BlockDriverState *bs = opaque;
|
|
QObject *obj;
|
|
|
|
trace_block_job_cb(bs, bs->job, ret);
|
|
|
|
assert(bs->job);
|
|
obj = qobject_from_block_job(bs->job);
|
|
if (ret < 0) {
|
|
QDict *dict = qobject_to_qdict(obj);
|
|
qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
|
|
}
|
|
|
|
if (block_job_is_cancelled(bs->job)) {
|
|
monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
|
|
} else {
|
|
monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
|
|
}
|
|
qobject_decref(obj);
|
|
|
|
drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
|
|
}
|
|
|
|
void qmp_block_stream(const char *device, bool has_base,
|
|
const char *base, bool has_speed, int64_t speed,
|
|
bool has_on_error, BlockdevOnError on_error,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *base_bs = NULL;
|
|
Error *local_err = NULL;
|
|
|
|
if (!has_on_error) {
|
|
on_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (base) {
|
|
base_bs = bdrv_find_backing_image(bs, base);
|
|
if (base_bs == NULL) {
|
|
error_set(errp, QERR_BASE_NOT_FOUND, base);
|
|
return;
|
|
}
|
|
}
|
|
|
|
stream_start(bs, base_bs, base, has_speed ? speed : 0,
|
|
on_error, block_job_cb, bs, &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
|
* underneath us.
|
|
*/
|
|
drive_get_ref(drive_get_by_blockdev(bs));
|
|
|
|
trace_qmp_block_stream(bs, bs->job);
|
|
}
|
|
|
|
void qmp_block_commit(const char *device,
|
|
bool has_base, const char *base, const char *top,
|
|
bool has_speed, int64_t speed,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *base_bs, *top_bs;
|
|
Error *local_err = NULL;
|
|
/* This will be part of the QMP command, if/when the
|
|
* BlockdevOnError change for blkmirror makes it in
|
|
*/
|
|
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
|
|
/* drain all i/o before commits */
|
|
bdrv_drain_all();
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
/* default top_bs is the active layer */
|
|
top_bs = bs;
|
|
|
|
if (top) {
|
|
if (strcmp(bs->filename, top) != 0) {
|
|
top_bs = bdrv_find_backing_image(bs, top);
|
|
}
|
|
}
|
|
|
|
if (top_bs == NULL) {
|
|
error_setg(errp, "Top image file %s not found", top ? top : "NULL");
|
|
return;
|
|
}
|
|
|
|
if (has_base && base) {
|
|
base_bs = bdrv_find_backing_image(top_bs, base);
|
|
} else {
|
|
base_bs = bdrv_find_base(top_bs);
|
|
}
|
|
|
|
if (base_bs == NULL) {
|
|
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
|
return;
|
|
}
|
|
|
|
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
|
|
&local_err);
|
|
if (local_err != NULL) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
|
* underneath us.
|
|
*/
|
|
drive_get_ref(drive_get_by_blockdev(bs));
|
|
}
|
|
|
|
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
|
|
|
|
void qmp_drive_mirror(const char *device, const char *target,
|
|
bool has_format, const char *format,
|
|
enum MirrorSyncMode sync,
|
|
bool has_mode, enum NewImageMode mode,
|
|
bool has_speed, int64_t speed,
|
|
bool has_granularity, uint32_t granularity,
|
|
bool has_buf_size, int64_t buf_size,
|
|
bool has_on_source_error, BlockdevOnError on_source_error,
|
|
bool has_on_target_error, BlockdevOnError on_target_error,
|
|
Error **errp)
|
|
{
|
|
BlockDriverState *bs;
|
|
BlockDriverState *source, *target_bs;
|
|
BlockDriver *proto_drv;
|
|
BlockDriver *drv = NULL;
|
|
Error *local_err = NULL;
|
|
int flags;
|
|
uint64_t size;
|
|
int ret;
|
|
|
|
if (!has_speed) {
|
|
speed = 0;
|
|
}
|
|
if (!has_on_source_error) {
|
|
on_source_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
if (!has_on_target_error) {
|
|
on_target_error = BLOCKDEV_ON_ERROR_REPORT;
|
|
}
|
|
if (!has_mode) {
|
|
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
|
}
|
|
if (!has_granularity) {
|
|
granularity = 0;
|
|
}
|
|
if (!has_buf_size) {
|
|
buf_size = DEFAULT_MIRROR_BUF_SIZE;
|
|
}
|
|
|
|
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
|
|
error_set(errp, QERR_INVALID_PARAMETER, device);
|
|
return;
|
|
}
|
|
if (granularity & (granularity - 1)) {
|
|
error_set(errp, QERR_INVALID_PARAMETER, device);
|
|
return;
|
|
}
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, device);
|
|
return;
|
|
}
|
|
|
|
if (!bdrv_is_inserted(bs)) {
|
|
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
|
|
return;
|
|
}
|
|
|
|
if (!has_format) {
|
|
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
|
}
|
|
if (format) {
|
|
drv = bdrv_find_format(format);
|
|
if (!drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (bdrv_in_use(bs)) {
|
|
error_set(errp, QERR_DEVICE_IN_USE, device);
|
|
return;
|
|
}
|
|
|
|
flags = bs->open_flags | BDRV_O_RDWR;
|
|
source = bs->backing_hd;
|
|
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
|
sync = MIRROR_SYNC_MODE_FULL;
|
|
}
|
|
|
|
proto_drv = bdrv_find_protocol(target);
|
|
if (!proto_drv) {
|
|
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
|
|
return;
|
|
}
|
|
|
|
bdrv_get_geometry(bs, &size);
|
|
size *= 512;
|
|
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
|
|
/* create new image w/o backing file */
|
|
assert(format && drv);
|
|
bdrv_img_create(target, format,
|
|
NULL, NULL, NULL, size, flags, &local_err, false);
|
|
} else {
|
|
switch (mode) {
|
|
case NEW_IMAGE_MODE_EXISTING:
|
|
ret = 0;
|
|
break;
|
|
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
|
/* create new image with backing file */
|
|
bdrv_img_create(target, format,
|
|
source->filename,
|
|
source->drv->format_name,
|
|
NULL, size, flags, &local_err, false);
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
}
|
|
|
|
if (error_is_set(&local_err)) {
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
/* Mirroring takes care of copy-on-write using the source's backing
|
|
* file.
|
|
*/
|
|
target_bs = bdrv_new("");
|
|
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
|
|
|
|
if (ret < 0) {
|
|
bdrv_delete(target_bs);
|
|
error_setg_file_open(errp, -ret, target);
|
|
return;
|
|
}
|
|
|
|
mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
|
|
on_source_error, on_target_error,
|
|
block_job_cb, bs, &local_err);
|
|
if (local_err != NULL) {
|
|
bdrv_delete(target_bs);
|
|
error_propagate(errp, local_err);
|
|
return;
|
|
}
|
|
|
|
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
|
* underneath us.
|
|
*/
|
|
drive_get_ref(drive_get_by_blockdev(bs));
|
|
}
|
|
|
|
static BlockJob *find_block_job(const char *device)
|
|
{
|
|
BlockDriverState *bs;
|
|
|
|
bs = bdrv_find(device);
|
|
if (!bs || !bs->job) {
|
|
return NULL;
|
|
}
|
|
return bs->job;
|
|
}
|
|
|
|
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
block_job_set_speed(job, speed, errp);
|
|
}
|
|
|
|
void qmp_block_job_cancel(const char *device,
|
|
bool has_force, bool force, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!has_force) {
|
|
force = false;
|
|
}
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
if (job->paused && !force) {
|
|
error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_cancel(job);
|
|
block_job_cancel(job);
|
|
}
|
|
|
|
void qmp_block_job_pause(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_pause(job);
|
|
block_job_pause(job);
|
|
}
|
|
|
|
void qmp_block_job_resume(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_resume(job);
|
|
block_job_resume(job);
|
|
}
|
|
|
|
void qmp_block_job_complete(const char *device, Error **errp)
|
|
{
|
|
BlockJob *job = find_block_job(device);
|
|
|
|
if (!job) {
|
|
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
|
|
return;
|
|
}
|
|
|
|
trace_qmp_block_job_complete(job);
|
|
block_job_complete(job, errp);
|
|
}
|
|
|
|
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
|
|
{
|
|
BlockJobInfoList **prev = opaque;
|
|
BlockJob *job = bs->job;
|
|
|
|
if (job) {
|
|
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
|
elem->value = block_job_query(bs->job);
|
|
(*prev)->next = elem;
|
|
*prev = elem;
|
|
}
|
|
}
|
|
|
|
BlockJobInfoList *qmp_query_block_jobs(Error **errp)
|
|
{
|
|
/* Dummy is a fake list element for holding the head pointer */
|
|
BlockJobInfoList dummy = {};
|
|
BlockJobInfoList *prev = &dummy;
|
|
bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
|
|
return dummy.next;
|
|
}
|
|
|
|
QemuOptsList qemu_common_drive_opts = {
|
|
.name = "drive",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = "bus",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "bus number",
|
|
},{
|
|
.name = "unit",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "unit number (i.e. lun for scsi)",
|
|
},{
|
|
.name = "if",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
|
},{
|
|
.name = "index",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "index number",
|
|
},{
|
|
.name = "cyls",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of cylinders (ide disk geometry)",
|
|
},{
|
|
.name = "heads",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of heads (ide disk geometry)",
|
|
},{
|
|
.name = "secs",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of sectors (ide disk geometry)",
|
|
},{
|
|
.name = "trans",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "chs translation (auto, lba. none)",
|
|
},{
|
|
.name = "media",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "media type (disk, cdrom)",
|
|
},{
|
|
.name = "snapshot",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "enable/disable snapshot mode",
|
|
},{
|
|
.name = "file",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk image",
|
|
},{
|
|
.name = "discard",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "discard operation (ignore/off, unmap/on)",
|
|
},{
|
|
.name = "cache",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "host cache usage (none, writeback, writethrough, "
|
|
"directsync, unsafe)",
|
|
},{
|
|
.name = "aio",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "host AIO implementation (threads, native)",
|
|
},{
|
|
.name = "format",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk format (raw, qcow2, ...)",
|
|
},{
|
|
.name = "serial",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk serial number",
|
|
},{
|
|
.name = "rerror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "read error action",
|
|
},{
|
|
.name = "werror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "write error action",
|
|
},{
|
|
.name = "addr",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "pci address (virtio only)",
|
|
},{
|
|
.name = "readonly",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "open drive file as read-only",
|
|
},{
|
|
.name = "iops",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit total I/O operations per second",
|
|
},{
|
|
.name = "iops_rd",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit read operations per second",
|
|
},{
|
|
.name = "iops_wr",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit write operations per second",
|
|
},{
|
|
.name = "bps",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit total bytes per second",
|
|
},{
|
|
.name = "bps_rd",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit read bytes per second",
|
|
},{
|
|
.name = "bps_wr",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit write bytes per second",
|
|
},{
|
|
.name = "copy-on-read",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "copy read data from backing file into image file",
|
|
},{
|
|
.name = "boot",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "(deprecated, ignored)",
|
|
},
|
|
{ /* end of list */ }
|
|
},
|
|
};
|
|
|
|
QemuOptsList qemu_drive_opts = {
|
|
.name = "drive",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
|
|
.desc = {
|
|
{
|
|
.name = "bus",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "bus number",
|
|
},{
|
|
.name = "unit",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "unit number (i.e. lun for scsi)",
|
|
},{
|
|
.name = "if",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
|
},{
|
|
.name = "index",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "index number",
|
|
},{
|
|
.name = "cyls",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of cylinders (ide disk geometry)",
|
|
},{
|
|
.name = "heads",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of heads (ide disk geometry)",
|
|
},{
|
|
.name = "secs",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "number of sectors (ide disk geometry)",
|
|
},{
|
|
.name = "trans",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "chs translation (auto, lba. none)",
|
|
},{
|
|
.name = "media",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "media type (disk, cdrom)",
|
|
},{
|
|
.name = "snapshot",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "enable/disable snapshot mode",
|
|
},{
|
|
.name = "file",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk image",
|
|
},{
|
|
.name = "discard",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "discard operation (ignore/off, unmap/on)",
|
|
},{
|
|
.name = "cache",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "host cache usage (none, writeback, writethrough, "
|
|
"directsync, unsafe)",
|
|
},{
|
|
.name = "aio",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "host AIO implementation (threads, native)",
|
|
},{
|
|
.name = "format",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk format (raw, qcow2, ...)",
|
|
},{
|
|
.name = "serial",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "disk serial number",
|
|
},{
|
|
.name = "rerror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "read error action",
|
|
},{
|
|
.name = "werror",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "write error action",
|
|
},{
|
|
.name = "addr",
|
|
.type = QEMU_OPT_STRING,
|
|
.help = "pci address (virtio only)",
|
|
},{
|
|
.name = "readonly",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "open drive file as read-only",
|
|
},{
|
|
.name = "iops",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit total I/O operations per second",
|
|
},{
|
|
.name = "iops_rd",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit read operations per second",
|
|
},{
|
|
.name = "iops_wr",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit write operations per second",
|
|
},{
|
|
.name = "bps",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit total bytes per second",
|
|
},{
|
|
.name = "bps_rd",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit read bytes per second",
|
|
},{
|
|
.name = "bps_wr",
|
|
.type = QEMU_OPT_NUMBER,
|
|
.help = "limit write bytes per second",
|
|
},{
|
|
.name = "copy-on-read",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "copy read data from backing file into image file",
|
|
},{
|
|
.name = "boot",
|
|
.type = QEMU_OPT_BOOL,
|
|
.help = "(deprecated, ignored)",
|
|
},
|
|
{ /* end of list */ }
|
|
},
|
|
};
|