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| 1 |
/*
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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" |
| 34 |
#include "hw/block/block.h" |
| 35 |
#include "block/blockjob.h" |
| 36 |
#include "monitor/monitor.h" |
| 37 |
#include "qapi/qmp/qerror.h" |
| 38 |
#include "qemu/option.h" |
| 39 |
#include "qemu/config-file.h" |
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#include "qapi/qmp/types.h" |
| 41 |
#include "qapi-visit.h" |
| 42 |
#include "qapi/qmp-output-visitor.h" |
| 43 |
#include "sysemu/sysemu.h" |
| 44 |
#include "block/block_int.h" |
| 45 |
#include "qmp-commands.h" |
| 46 |
#include "trace.h" |
| 47 |
#include "sysemu/arch_init.h" |
| 48 |
|
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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
|
| 50 |
|
| 51 |
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",
|
| 60 |
[IF_XEN] = "xen",
|
| 61 |
}; |
| 62 |
|
| 63 |
static const int if_max_devs[IF_COUNT] = { |
| 64 |
/*
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* Do not change these numbers! They govern how drive option
|
| 66 |
* index maps to unit and bus. That mapping is ABI.
|
| 67 |
*
|
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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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| 71 |
* 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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}; |
| 81 |
|
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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
|
| 86 |
* 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); |
| 92 |
|
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if (dinfo && !dinfo->enable_auto_del) {
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return;
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} |
| 96 |
|
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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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} |
| 104 |
|
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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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|
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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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} |
| 113 |
|
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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; |
| 118 |
} |
| 119 |
|
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static int drive_index_to_unit_id(BlockInterfaceType type, int index) |
| 121 |
{
|
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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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} |
| 125 |
|
| 126 |
QemuOpts *drive_def(const char *optstr) |
| 127 |
{
|
| 128 |
return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); |
| 129 |
} |
| 130 |
|
| 131 |
QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
| 132 |
const char *optstr) |
| 133 |
{
|
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QemuOpts *opts; |
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char buf[32]; |
| 136 |
|
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opts = drive_def(optstr); |
| 138 |
if (!opts) {
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return NULL; |
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} |
| 141 |
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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} |
| 148 |
if (file)
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qemu_opt_set(opts, "file", file);
|
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return opts;
|
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} |
| 152 |
|
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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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|
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/* seek interface, bus and unit */
|
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|
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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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|
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return NULL; |
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} |
| 168 |
|
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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)); |
| 174 |
} |
| 175 |
|
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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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|
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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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|
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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) |
| 194 |
{
|
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static int next_block_unit[IF_COUNT]; |
| 196 |
|
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return drive_get(type, 0, next_block_unit[type]++); |
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} |
| 199 |
|
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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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|
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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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|
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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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|
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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); |
| 221 |
} |
| 222 |
|
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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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} |
| 229 |
|
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void drive_put_ref(DriveInfo *dinfo)
|
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{
|
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assert(dinfo->refcount); |
| 233 |
if (--dinfo->refcount == 0) { |
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drive_uninit(dinfo); |
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} |
| 236 |
} |
| 237 |
|
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void drive_get_ref(DriveInfo *dinfo)
|
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{
|
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dinfo->refcount++; |
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} |
| 242 |
|
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typedef struct { |
| 244 |
QEMUBH *bh; |
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BlockDriverState *bs; |
| 246 |
} BDRVPutRefBH; |
| 247 |
|
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static void bdrv_put_ref_bh(void *opaque) |
| 249 |
{
|
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BDRVPutRefBH *s = opaque; |
| 251 |
|
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bdrv_unref(s->bs); |
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qemu_bh_delete(s->bh); |
| 254 |
g_free(s); |
| 255 |
} |
| 256 |
|
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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) |
| 265 |
{
|
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BDRVPutRefBH *s; |
| 267 |
|
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s = g_new(BDRVPutRefBH, 1);
|
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s->bh = qemu_bh_new(bdrv_put_ref_bh, s); |
| 270 |
s->bs = bs; |
| 271 |
qemu_bh_schedule(s->bh); |
| 272 |
} |
| 273 |
|
| 274 |
static int parse_block_error_action(const char *buf, bool is_read, Error **errp) |
| 275 |
{
|
| 276 |
if (!strcmp(buf, "ignore")) { |
| 277 |
return BLOCKDEV_ON_ERROR_IGNORE;
|
| 278 |
} else if (!is_read && !strcmp(buf, "enospc")) { |
| 279 |
return BLOCKDEV_ON_ERROR_ENOSPC;
|
| 280 |
} else if (!strcmp(buf, "stop")) { |
| 281 |
return BLOCKDEV_ON_ERROR_STOP;
|
| 282 |
} else if (!strcmp(buf, "report")) { |
| 283 |
return BLOCKDEV_ON_ERROR_REPORT;
|
| 284 |
} else {
|
| 285 |
error_setg(errp, "'%s' invalid %s error action",
|
| 286 |
buf, is_read ? "read" : "write"); |
| 287 |
return -1; |
| 288 |
} |
| 289 |
} |
| 290 |
|
| 291 |
static bool check_throttle_config(ThrottleConfig *cfg, Error **errp) |
| 292 |
{
|
| 293 |
if (throttle_conflicting(cfg)) {
|
| 294 |
error_setg(errp, "bps/iops/max total values and read/write values"
|
| 295 |
" cannot be used at the same time");
|
| 296 |
return false; |
| 297 |
} |
| 298 |
|
| 299 |
if (!throttle_is_valid(cfg)) {
|
| 300 |
error_setg(errp, "bps/iops/maxs values must be 0 or greater");
|
| 301 |
return false; |
| 302 |
} |
| 303 |
|
| 304 |
return true; |
| 305 |
} |
| 306 |
|
| 307 |
typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; |
| 308 |
|
| 309 |
/* Takes the ownership of bs_opts */
|
| 310 |
static DriveInfo *blockdev_init(const char *file, QDict *bs_opts, |
| 311 |
BlockInterfaceType type, |
| 312 |
Error **errp) |
| 313 |
{
|
| 314 |
const char *buf; |
| 315 |
const char *serial; |
| 316 |
int ro = 0; |
| 317 |
int bdrv_flags = 0; |
| 318 |
int on_read_error, on_write_error;
|
| 319 |
DriveInfo *dinfo; |
| 320 |
ThrottleConfig cfg; |
| 321 |
int snapshot = 0; |
| 322 |
bool copy_on_read;
|
| 323 |
int ret;
|
| 324 |
Error *error = NULL;
|
| 325 |
QemuOpts *opts; |
| 326 |
const char *id; |
| 327 |
bool has_driver_specific_opts;
|
| 328 |
BlockDriver *drv = NULL;
|
| 329 |
|
| 330 |
/* Check common options by copying from bs_opts to opts, all other options
|
| 331 |
* stay in bs_opts for processing by bdrv_open(). */
|
| 332 |
id = qdict_get_try_str(bs_opts, "id");
|
| 333 |
opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
|
| 334 |
if (error_is_set(&error)) {
|
| 335 |
error_propagate(errp, error); |
| 336 |
return NULL; |
| 337 |
} |
| 338 |
|
| 339 |
qemu_opts_absorb_qdict(opts, bs_opts, &error); |
| 340 |
if (error_is_set(&error)) {
|
| 341 |
error_propagate(errp, error); |
| 342 |
goto early_err;
|
| 343 |
} |
| 344 |
|
| 345 |
if (id) {
|
| 346 |
qdict_del(bs_opts, "id");
|
| 347 |
} |
| 348 |
|
| 349 |
has_driver_specific_opts = !!qdict_size(bs_opts); |
| 350 |
|
| 351 |
/* extract parameters */
|
| 352 |
snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
| 353 |
ro = qemu_opt_get_bool(opts, "read-only", 0); |
| 354 |
copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
| 355 |
|
| 356 |
serial = qemu_opt_get(opts, "serial");
|
| 357 |
|
| 358 |
if ((buf = qemu_opt_get(opts, "discard")) != NULL) { |
| 359 |
if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { |
| 360 |
error_setg(errp, "invalid discard option");
|
| 361 |
goto early_err;
|
| 362 |
} |
| 363 |
} |
| 364 |
|
| 365 |
if (qemu_opt_get_bool(opts, "cache.writeback", true)) { |
| 366 |
bdrv_flags |= BDRV_O_CACHE_WB; |
| 367 |
} |
| 368 |
if (qemu_opt_get_bool(opts, "cache.direct", false)) { |
| 369 |
bdrv_flags |= BDRV_O_NOCACHE; |
| 370 |
} |
| 371 |
if (qemu_opt_get_bool(opts, "cache.no-flush", false)) { |
| 372 |
bdrv_flags |= BDRV_O_NO_FLUSH; |
| 373 |
} |
| 374 |
|
| 375 |
#ifdef CONFIG_LINUX_AIO
|
| 376 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
| 377 |
if (!strcmp(buf, "native")) { |
| 378 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
| 379 |
} else if (!strcmp(buf, "threads")) { |
| 380 |
/* this is the default */
|
| 381 |
} else {
|
| 382 |
error_setg(errp, "invalid aio option");
|
| 383 |
goto early_err;
|
| 384 |
} |
| 385 |
} |
| 386 |
#endif
|
| 387 |
|
| 388 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
| 389 |
if (is_help_option(buf)) {
|
| 390 |
error_printf("Supported formats:");
|
| 391 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
| 392 |
error_printf("\n");
|
| 393 |
goto early_err;
|
| 394 |
} |
| 395 |
|
| 396 |
drv = bdrv_find_format(buf); |
| 397 |
if (!drv) {
|
| 398 |
error_setg(errp, "'%s' invalid format", buf);
|
| 399 |
goto early_err;
|
| 400 |
} |
| 401 |
} |
| 402 |
|
| 403 |
/* disk I/O throttling */
|
| 404 |
memset(&cfg, 0, sizeof(cfg)); |
| 405 |
cfg.buckets[THROTTLE_BPS_TOTAL].avg = |
| 406 |
qemu_opt_get_number(opts, "throttling.bps-total", 0); |
| 407 |
cfg.buckets[THROTTLE_BPS_READ].avg = |
| 408 |
qemu_opt_get_number(opts, "throttling.bps-read", 0); |
| 409 |
cfg.buckets[THROTTLE_BPS_WRITE].avg = |
| 410 |
qemu_opt_get_number(opts, "throttling.bps-write", 0); |
| 411 |
cfg.buckets[THROTTLE_OPS_TOTAL].avg = |
| 412 |
qemu_opt_get_number(opts, "throttling.iops-total", 0); |
| 413 |
cfg.buckets[THROTTLE_OPS_READ].avg = |
| 414 |
qemu_opt_get_number(opts, "throttling.iops-read", 0); |
| 415 |
cfg.buckets[THROTTLE_OPS_WRITE].avg = |
| 416 |
qemu_opt_get_number(opts, "throttling.iops-write", 0); |
| 417 |
|
| 418 |
cfg.buckets[THROTTLE_BPS_TOTAL].max = |
| 419 |
qemu_opt_get_number(opts, "throttling.bps-total-max", 0); |
| 420 |
cfg.buckets[THROTTLE_BPS_READ].max = |
| 421 |
qemu_opt_get_number(opts, "throttling.bps-read-max", 0); |
| 422 |
cfg.buckets[THROTTLE_BPS_WRITE].max = |
| 423 |
qemu_opt_get_number(opts, "throttling.bps-write-max", 0); |
| 424 |
cfg.buckets[THROTTLE_OPS_TOTAL].max = |
| 425 |
qemu_opt_get_number(opts, "throttling.iops-total-max", 0); |
| 426 |
cfg.buckets[THROTTLE_OPS_READ].max = |
| 427 |
qemu_opt_get_number(opts, "throttling.iops-read-max", 0); |
| 428 |
cfg.buckets[THROTTLE_OPS_WRITE].max = |
| 429 |
qemu_opt_get_number(opts, "throttling.iops-write-max", 0); |
| 430 |
|
| 431 |
cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0); |
| 432 |
|
| 433 |
if (!check_throttle_config(&cfg, &error)) {
|
| 434 |
error_propagate(errp, error); |
| 435 |
goto early_err;
|
| 436 |
} |
| 437 |
|
| 438 |
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
| 439 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
| 440 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
| 441 |
error_setg(errp, "werror is not supported by this bus type");
|
| 442 |
goto early_err;
|
| 443 |
} |
| 444 |
|
| 445 |
on_write_error = parse_block_error_action(buf, 0, &error);
|
| 446 |
if (error_is_set(&error)) {
|
| 447 |
error_propagate(errp, error); |
| 448 |
goto early_err;
|
| 449 |
} |
| 450 |
} |
| 451 |
|
| 452 |
on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
| 453 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
| 454 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
| 455 |
error_report("rerror is not supported by this bus type");
|
| 456 |
goto early_err;
|
| 457 |
} |
| 458 |
|
| 459 |
on_read_error = parse_block_error_action(buf, 1, &error);
|
| 460 |
if (error_is_set(&error)) {
|
| 461 |
error_propagate(errp, error); |
| 462 |
goto early_err;
|
| 463 |
} |
| 464 |
} |
| 465 |
|
| 466 |
/* init */
|
| 467 |
dinfo = g_malloc0(sizeof(*dinfo));
|
| 468 |
dinfo->id = g_strdup(qemu_opts_id(opts)); |
| 469 |
dinfo->bdrv = bdrv_new(dinfo->id); |
| 470 |
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
| 471 |
dinfo->bdrv->read_only = ro; |
| 472 |
dinfo->type = type; |
| 473 |
dinfo->refcount = 1;
|
| 474 |
if (serial != NULL) { |
| 475 |
dinfo->serial = g_strdup(serial); |
| 476 |
} |
| 477 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
| 478 |
|
| 479 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
| 480 |
|
| 481 |
/* disk I/O throttling */
|
| 482 |
if (throttle_enabled(&cfg)) {
|
| 483 |
bdrv_io_limits_enable(dinfo->bdrv); |
| 484 |
bdrv_set_io_limits(dinfo->bdrv, &cfg); |
| 485 |
} |
| 486 |
|
| 487 |
if (!file || !*file) {
|
| 488 |
if (has_driver_specific_opts) {
|
| 489 |
file = NULL;
|
| 490 |
} else {
|
| 491 |
QDECREF(bs_opts); |
| 492 |
qemu_opts_del(opts); |
| 493 |
return dinfo;
|
| 494 |
} |
| 495 |
} |
| 496 |
if (snapshot) {
|
| 497 |
/* always use cache=unsafe with snapshot */
|
| 498 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
| 499 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
| 500 |
} |
| 501 |
|
| 502 |
if (copy_on_read) {
|
| 503 |
bdrv_flags |= BDRV_O_COPY_ON_READ; |
| 504 |
} |
| 505 |
|
| 506 |
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
| 507 |
bdrv_flags |= BDRV_O_INCOMING; |
| 508 |
} |
| 509 |
|
| 510 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
| 511 |
|
| 512 |
QINCREF(bs_opts); |
| 513 |
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error); |
| 514 |
|
| 515 |
if (ret < 0) { |
| 516 |
error_setg(errp, "could not open disk image %s: %s",
|
| 517 |
file ?: dinfo->id, error_get_pretty(error)); |
| 518 |
error_free(error); |
| 519 |
goto err;
|
| 520 |
} |
| 521 |
|
| 522 |
if (bdrv_key_required(dinfo->bdrv))
|
| 523 |
autostart = 0;
|
| 524 |
|
| 525 |
QDECREF(bs_opts); |
| 526 |
qemu_opts_del(opts); |
| 527 |
|
| 528 |
return dinfo;
|
| 529 |
|
| 530 |
err:
|
| 531 |
bdrv_unref(dinfo->bdrv); |
| 532 |
g_free(dinfo->id); |
| 533 |
QTAILQ_REMOVE(&drives, dinfo, next); |
| 534 |
g_free(dinfo); |
| 535 |
early_err:
|
| 536 |
QDECREF(bs_opts); |
| 537 |
qemu_opts_del(opts); |
| 538 |
return NULL; |
| 539 |
} |
| 540 |
|
| 541 |
static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to) |
| 542 |
{
|
| 543 |
const char *value; |
| 544 |
|
| 545 |
value = qemu_opt_get(opts, from); |
| 546 |
if (value) {
|
| 547 |
qemu_opt_set(opts, to, value); |
| 548 |
qemu_opt_unset(opts, from); |
| 549 |
} |
| 550 |
} |
| 551 |
|
| 552 |
QemuOptsList qemu_legacy_drive_opts = {
|
| 553 |
.name = "drive",
|
| 554 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), |
| 555 |
.desc = {
|
| 556 |
{
|
| 557 |
.name = "bus",
|
| 558 |
.type = QEMU_OPT_NUMBER, |
| 559 |
.help = "bus number",
|
| 560 |
},{
|
| 561 |
.name = "unit",
|
| 562 |
.type = QEMU_OPT_NUMBER, |
| 563 |
.help = "unit number (i.e. lun for scsi)",
|
| 564 |
},{
|
| 565 |
.name = "index",
|
| 566 |
.type = QEMU_OPT_NUMBER, |
| 567 |
.help = "index number",
|
| 568 |
},{
|
| 569 |
.name = "media",
|
| 570 |
.type = QEMU_OPT_STRING, |
| 571 |
.help = "media type (disk, cdrom)",
|
| 572 |
},{
|
| 573 |
.name = "if",
|
| 574 |
.type = QEMU_OPT_STRING, |
| 575 |
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
| 576 |
},{
|
| 577 |
.name = "cyls",
|
| 578 |
.type = QEMU_OPT_NUMBER, |
| 579 |
.help = "number of cylinders (ide disk geometry)",
|
| 580 |
},{
|
| 581 |
.name = "heads",
|
| 582 |
.type = QEMU_OPT_NUMBER, |
| 583 |
.help = "number of heads (ide disk geometry)",
|
| 584 |
},{
|
| 585 |
.name = "secs",
|
| 586 |
.type = QEMU_OPT_NUMBER, |
| 587 |
.help = "number of sectors (ide disk geometry)",
|
| 588 |
},{
|
| 589 |
.name = "trans",
|
| 590 |
.type = QEMU_OPT_STRING, |
| 591 |
.help = "chs translation (auto, lba, none)",
|
| 592 |
},{
|
| 593 |
.name = "boot",
|
| 594 |
.type = QEMU_OPT_BOOL, |
| 595 |
.help = "(deprecated, ignored)",
|
| 596 |
},{
|
| 597 |
.name = "addr",
|
| 598 |
.type = QEMU_OPT_STRING, |
| 599 |
.help = "pci address (virtio only)",
|
| 600 |
},{
|
| 601 |
.name = "file",
|
| 602 |
.type = QEMU_OPT_STRING, |
| 603 |
.help = "file name",
|
| 604 |
}, |
| 605 |
|
| 606 |
/* Options that are passed on, but have special semantics with -drive */
|
| 607 |
{
|
| 608 |
.name = "read-only",
|
| 609 |
.type = QEMU_OPT_BOOL, |
| 610 |
.help = "open drive file as read-only",
|
| 611 |
},{
|
| 612 |
.name = "copy-on-read",
|
| 613 |
.type = QEMU_OPT_BOOL, |
| 614 |
.help = "copy read data from backing file into image file",
|
| 615 |
}, |
| 616 |
|
| 617 |
{ /* end of list */ }
|
| 618 |
}, |
| 619 |
}; |
| 620 |
|
| 621 |
DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) |
| 622 |
{
|
| 623 |
const char *value; |
| 624 |
DriveInfo *dinfo = NULL;
|
| 625 |
QDict *bs_opts; |
| 626 |
QemuOpts *legacy_opts; |
| 627 |
DriveMediaType media = MEDIA_DISK; |
| 628 |
BlockInterfaceType type; |
| 629 |
int cyls, heads, secs, translation;
|
| 630 |
int max_devs, bus_id, unit_id, index;
|
| 631 |
const char *devaddr; |
| 632 |
bool read_only = false; |
| 633 |
bool copy_on_read;
|
| 634 |
const char *filename; |
| 635 |
Error *local_err = NULL;
|
| 636 |
|
| 637 |
/* Change legacy command line options into QMP ones */
|
| 638 |
qemu_opt_rename(all_opts, "iops", "throttling.iops-total"); |
| 639 |
qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read"); |
| 640 |
qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write"); |
| 641 |
|
| 642 |
qemu_opt_rename(all_opts, "bps", "throttling.bps-total"); |
| 643 |
qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read"); |
| 644 |
qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write"); |
| 645 |
|
| 646 |
qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max"); |
| 647 |
qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max"); |
| 648 |
qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max"); |
| 649 |
|
| 650 |
qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max"); |
| 651 |
qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max"); |
| 652 |
qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max"); |
| 653 |
|
| 654 |
qemu_opt_rename(all_opts, |
| 655 |
"iops_size", "throttling.iops-size"); |
| 656 |
|
| 657 |
qemu_opt_rename(all_opts, "readonly", "read-only"); |
| 658 |
|
| 659 |
value = qemu_opt_get(all_opts, "cache");
|
| 660 |
if (value) {
|
| 661 |
int flags = 0; |
| 662 |
|
| 663 |
if (bdrv_parse_cache_flags(value, &flags) != 0) { |
| 664 |
error_report("invalid cache option");
|
| 665 |
return NULL; |
| 666 |
} |
| 667 |
|
| 668 |
/* Specific options take precedence */
|
| 669 |
if (!qemu_opt_get(all_opts, "cache.writeback")) { |
| 670 |
qemu_opt_set_bool(all_opts, "cache.writeback",
|
| 671 |
!!(flags & BDRV_O_CACHE_WB)); |
| 672 |
} |
| 673 |
if (!qemu_opt_get(all_opts, "cache.direct")) { |
| 674 |
qemu_opt_set_bool(all_opts, "cache.direct",
|
| 675 |
!!(flags & BDRV_O_NOCACHE)); |
| 676 |
} |
| 677 |
if (!qemu_opt_get(all_opts, "cache.no-flush")) { |
| 678 |
qemu_opt_set_bool(all_opts, "cache.no-flush",
|
| 679 |
!!(flags & BDRV_O_NO_FLUSH)); |
| 680 |
} |
| 681 |
qemu_opt_unset(all_opts, "cache");
|
| 682 |
} |
| 683 |
|
| 684 |
/* Get a QDict for processing the options */
|
| 685 |
bs_opts = qdict_new(); |
| 686 |
qemu_opts_to_qdict(all_opts, bs_opts); |
| 687 |
|
| 688 |
legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, |
| 689 |
&error_abort); |
| 690 |
qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err); |
| 691 |
if (error_is_set(&local_err)) {
|
| 692 |
qerror_report_err(local_err); |
| 693 |
error_free(local_err); |
| 694 |
goto fail;
|
| 695 |
} |
| 696 |
|
| 697 |
/* Deprecated option boot=[on|off] */
|
| 698 |
if (qemu_opt_get(legacy_opts, "boot") != NULL) { |
| 699 |
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
| 700 |
"ignored. Future versions will reject this parameter. Please "
|
| 701 |
"update your scripts.\n");
|
| 702 |
} |
| 703 |
|
| 704 |
/* Media type */
|
| 705 |
value = qemu_opt_get(legacy_opts, "media");
|
| 706 |
if (value) {
|
| 707 |
if (!strcmp(value, "disk")) { |
| 708 |
media = MEDIA_DISK; |
| 709 |
} else if (!strcmp(value, "cdrom")) { |
| 710 |
media = MEDIA_CDROM; |
| 711 |
read_only = true;
|
| 712 |
} else {
|
| 713 |
error_report("'%s' invalid media", value);
|
| 714 |
goto fail;
|
| 715 |
} |
| 716 |
} |
| 717 |
|
| 718 |
/* copy-on-read is disabled with a warning for read-only devices */
|
| 719 |
read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false); |
| 720 |
copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); |
| 721 |
|
| 722 |
if (read_only && copy_on_read) {
|
| 723 |
error_report("warning: disabling copy-on-read on read-only drive");
|
| 724 |
copy_on_read = false;
|
| 725 |
} |
| 726 |
|
| 727 |
qdict_put(bs_opts, "read-only",
|
| 728 |
qstring_from_str(read_only ? "on" : "off")); |
| 729 |
qdict_put(bs_opts, "copy-on-read",
|
| 730 |
qstring_from_str(copy_on_read ? "on" :"off")); |
| 731 |
|
| 732 |
/* Controller type */
|
| 733 |
value = qemu_opt_get(legacy_opts, "if");
|
| 734 |
if (value) {
|
| 735 |
for (type = 0; |
| 736 |
type < IF_COUNT && strcmp(value, if_name[type]); |
| 737 |
type++) {
|
| 738 |
} |
| 739 |
if (type == IF_COUNT) {
|
| 740 |
error_report("unsupported bus type '%s'", value);
|
| 741 |
goto fail;
|
| 742 |
} |
| 743 |
} else {
|
| 744 |
type = block_default_type; |
| 745 |
} |
| 746 |
|
| 747 |
/* Geometry */
|
| 748 |
cyls = qemu_opt_get_number(legacy_opts, "cyls", 0); |
| 749 |
heads = qemu_opt_get_number(legacy_opts, "heads", 0); |
| 750 |
secs = qemu_opt_get_number(legacy_opts, "secs", 0); |
| 751 |
|
| 752 |
if (cyls || heads || secs) {
|
| 753 |
if (cyls < 1) { |
| 754 |
error_report("invalid physical cyls number");
|
| 755 |
goto fail;
|
| 756 |
} |
| 757 |
if (heads < 1) { |
| 758 |
error_report("invalid physical heads number");
|
| 759 |
goto fail;
|
| 760 |
} |
| 761 |
if (secs < 1) { |
| 762 |
error_report("invalid physical secs number");
|
| 763 |
goto fail;
|
| 764 |
} |
| 765 |
} |
| 766 |
|
| 767 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
| 768 |
value = qemu_opt_get(legacy_opts, "trans");
|
| 769 |
if (value != NULL) { |
| 770 |
if (!cyls) {
|
| 771 |
error_report("'%s' trans must be used with cyls, heads and secs",
|
| 772 |
value); |
| 773 |
goto fail;
|
| 774 |
} |
| 775 |
if (!strcmp(value, "none")) { |
| 776 |
translation = BIOS_ATA_TRANSLATION_NONE; |
| 777 |
} else if (!strcmp(value, "lba")) { |
| 778 |
translation = BIOS_ATA_TRANSLATION_LBA; |
| 779 |
} else if (!strcmp(value, "auto")) { |
| 780 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
| 781 |
} else {
|
| 782 |
error_report("'%s' invalid translation type", value);
|
| 783 |
goto fail;
|
| 784 |
} |
| 785 |
} |
| 786 |
|
| 787 |
if (media == MEDIA_CDROM) {
|
| 788 |
if (cyls || secs || heads) {
|
| 789 |
error_report("CHS can't be set with media=cdrom");
|
| 790 |
goto fail;
|
| 791 |
} |
| 792 |
} |
| 793 |
|
| 794 |
/* Device address specified by bus/unit or index.
|
| 795 |
* If none was specified, try to find the first free one. */
|
| 796 |
bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); |
| 797 |
unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); |
| 798 |
index = qemu_opt_get_number(legacy_opts, "index", -1); |
| 799 |
|
| 800 |
max_devs = if_max_devs[type]; |
| 801 |
|
| 802 |
if (index != -1) { |
| 803 |
if (bus_id != 0 || unit_id != -1) { |
| 804 |
error_report("index cannot be used with bus and unit");
|
| 805 |
goto fail;
|
| 806 |
} |
| 807 |
bus_id = drive_index_to_bus_id(type, index); |
| 808 |
unit_id = drive_index_to_unit_id(type, index); |
| 809 |
} |
| 810 |
|
| 811 |
if (unit_id == -1) { |
| 812 |
unit_id = 0;
|
| 813 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
| 814 |
unit_id++; |
| 815 |
if (max_devs && unit_id >= max_devs) {
|
| 816 |
unit_id -= max_devs; |
| 817 |
bus_id++; |
| 818 |
} |
| 819 |
} |
| 820 |
} |
| 821 |
|
| 822 |
if (max_devs && unit_id >= max_devs) {
|
| 823 |
error_report("unit %d too big (max is %d)", unit_id, max_devs - 1); |
| 824 |
goto fail;
|
| 825 |
} |
| 826 |
|
| 827 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
| 828 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
| 829 |
bus_id, unit_id, index); |
| 830 |
goto fail;
|
| 831 |
} |
| 832 |
|
| 833 |
/* no id supplied -> create one */
|
| 834 |
if (qemu_opts_id(all_opts) == NULL) { |
| 835 |
char *new_id;
|
| 836 |
const char *mediastr = ""; |
| 837 |
if (type == IF_IDE || type == IF_SCSI) {
|
| 838 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
| 839 |
} |
| 840 |
if (max_devs) {
|
| 841 |
new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
|
| 842 |
mediastr, unit_id); |
| 843 |
} else {
|
| 844 |
new_id = g_strdup_printf("%s%s%i", if_name[type],
|
| 845 |
mediastr, unit_id); |
| 846 |
} |
| 847 |
qdict_put(bs_opts, "id", qstring_from_str(new_id));
|
| 848 |
g_free(new_id); |
| 849 |
} |
| 850 |
|
| 851 |
/* Add virtio block device */
|
| 852 |
devaddr = qemu_opt_get(legacy_opts, "addr");
|
| 853 |
if (devaddr && type != IF_VIRTIO) {
|
| 854 |
error_report("addr is not supported by this bus type");
|
| 855 |
goto fail;
|
| 856 |
} |
| 857 |
|
| 858 |
if (type == IF_VIRTIO) {
|
| 859 |
QemuOpts *devopts; |
| 860 |
devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
| 861 |
&error_abort); |
| 862 |
if (arch_type == QEMU_ARCH_S390X) {
|
| 863 |
qemu_opt_set(devopts, "driver", "virtio-blk-s390"); |
| 864 |
} else {
|
| 865 |
qemu_opt_set(devopts, "driver", "virtio-blk-pci"); |
| 866 |
} |
| 867 |
qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id")); |
| 868 |
if (devaddr) {
|
| 869 |
qemu_opt_set(devopts, "addr", devaddr);
|
| 870 |
} |
| 871 |
} |
| 872 |
|
| 873 |
filename = qemu_opt_get(legacy_opts, "file");
|
| 874 |
|
| 875 |
/* Actual block device init: Functionality shared with blockdev-add */
|
| 876 |
dinfo = blockdev_init(filename, bs_opts, type, &local_err); |
| 877 |
if (dinfo == NULL) { |
| 878 |
if (error_is_set(&local_err)) {
|
| 879 |
qerror_report_err(local_err); |
| 880 |
error_free(local_err); |
| 881 |
} |
| 882 |
goto fail;
|
| 883 |
} else {
|
| 884 |
assert(!error_is_set(&local_err)); |
| 885 |
} |
| 886 |
|
| 887 |
/* Set legacy DriveInfo fields */
|
| 888 |
dinfo->enable_auto_del = true;
|
| 889 |
dinfo->opts = all_opts; |
| 890 |
|
| 891 |
dinfo->cyls = cyls; |
| 892 |
dinfo->heads = heads; |
| 893 |
dinfo->secs = secs; |
| 894 |
dinfo->trans = translation; |
| 895 |
|
| 896 |
dinfo->bus = bus_id; |
| 897 |
dinfo->unit = unit_id; |
| 898 |
dinfo->devaddr = devaddr; |
| 899 |
|
| 900 |
switch(type) {
|
| 901 |
case IF_IDE:
|
| 902 |
case IF_SCSI:
|
| 903 |
case IF_XEN:
|
| 904 |
case IF_NONE:
|
| 905 |
dinfo->media_cd = media == MEDIA_CDROM; |
| 906 |
break;
|
| 907 |
default:
|
| 908 |
break;
|
| 909 |
} |
| 910 |
|
| 911 |
fail:
|
| 912 |
qemu_opts_del(legacy_opts); |
| 913 |
return dinfo;
|
| 914 |
} |
| 915 |
|
| 916 |
void do_commit(Monitor *mon, const QDict *qdict) |
| 917 |
{
|
| 918 |
const char *device = qdict_get_str(qdict, "device"); |
| 919 |
BlockDriverState *bs; |
| 920 |
int ret;
|
| 921 |
|
| 922 |
if (!strcmp(device, "all")) { |
| 923 |
ret = bdrv_commit_all(); |
| 924 |
} else {
|
| 925 |
bs = bdrv_find(device); |
| 926 |
if (!bs) {
|
| 927 |
monitor_printf(mon, "Device '%s' not found\n", device);
|
| 928 |
return;
|
| 929 |
} |
| 930 |
ret = bdrv_commit(bs); |
| 931 |
} |
| 932 |
if (ret < 0) { |
| 933 |
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
|
| 934 |
strerror(-ret)); |
| 935 |
} |
| 936 |
} |
| 937 |
|
| 938 |
static void blockdev_do_action(int kind, void *data, Error **errp) |
| 939 |
{
|
| 940 |
TransactionAction action; |
| 941 |
TransactionActionList list; |
| 942 |
|
| 943 |
action.kind = kind; |
| 944 |
action.data = data; |
| 945 |
list.value = &action; |
| 946 |
list.next = NULL;
|
| 947 |
qmp_transaction(&list, errp); |
| 948 |
} |
| 949 |
|
| 950 |
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
| 951 |
bool has_format, const char *format, |
| 952 |
bool has_mode, enum NewImageMode mode, |
| 953 |
Error **errp) |
| 954 |
{
|
| 955 |
BlockdevSnapshot snapshot = {
|
| 956 |
.device = (char *) device,
|
| 957 |
.snapshot_file = (char *) snapshot_file,
|
| 958 |
.has_format = has_format, |
| 959 |
.format = (char *) format,
|
| 960 |
.has_mode = has_mode, |
| 961 |
.mode = mode, |
| 962 |
}; |
| 963 |
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
| 964 |
&snapshot, errp); |
| 965 |
} |
| 966 |
|
| 967 |
void qmp_blockdev_snapshot_internal_sync(const char *device, |
| 968 |
const char *name, |
| 969 |
Error **errp) |
| 970 |
{
|
| 971 |
BlockdevSnapshotInternal snapshot = {
|
| 972 |
.device = (char *) device,
|
| 973 |
.name = (char *) name
|
| 974 |
}; |
| 975 |
|
| 976 |
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, |
| 977 |
&snapshot, errp); |
| 978 |
} |
| 979 |
|
| 980 |
SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
| 981 |
bool has_id,
|
| 982 |
const char *id, |
| 983 |
bool has_name,
|
| 984 |
const char *name, |
| 985 |
Error **errp) |
| 986 |
{
|
| 987 |
BlockDriverState *bs = bdrv_find(device); |
| 988 |
QEMUSnapshotInfo sn; |
| 989 |
Error *local_err = NULL;
|
| 990 |
SnapshotInfo *info = NULL;
|
| 991 |
int ret;
|
| 992 |
|
| 993 |
if (!bs) {
|
| 994 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 995 |
return NULL; |
| 996 |
} |
| 997 |
|
| 998 |
if (!has_id) {
|
| 999 |
id = NULL;
|
| 1000 |
} |
| 1001 |
|
| 1002 |
if (!has_name) {
|
| 1003 |
name = NULL;
|
| 1004 |
} |
| 1005 |
|
| 1006 |
if (!id && !name) {
|
| 1007 |
error_setg(errp, "Name or id must be provided");
|
| 1008 |
return NULL; |
| 1009 |
} |
| 1010 |
|
| 1011 |
ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); |
| 1012 |
if (error_is_set(&local_err)) {
|
| 1013 |
error_propagate(errp, local_err); |
| 1014 |
return NULL; |
| 1015 |
} |
| 1016 |
if (!ret) {
|
| 1017 |
error_setg(errp, |
| 1018 |
"Snapshot with id '%s' and name '%s' does not exist on "
|
| 1019 |
"device '%s'",
|
| 1020 |
STR_OR_NULL(id), STR_OR_NULL(name), device); |
| 1021 |
return NULL; |
| 1022 |
} |
| 1023 |
|
| 1024 |
bdrv_snapshot_delete(bs, id, name, &local_err); |
| 1025 |
if (error_is_set(&local_err)) {
|
| 1026 |
error_propagate(errp, local_err); |
| 1027 |
return NULL; |
| 1028 |
} |
| 1029 |
|
| 1030 |
info = g_malloc0(sizeof(SnapshotInfo));
|
| 1031 |
info->id = g_strdup(sn.id_str); |
| 1032 |
info->name = g_strdup(sn.name); |
| 1033 |
info->date_nsec = sn.date_nsec; |
| 1034 |
info->date_sec = sn.date_sec; |
| 1035 |
info->vm_state_size = sn.vm_state_size; |
| 1036 |
info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
|
| 1037 |
info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
|
| 1038 |
|
| 1039 |
return info;
|
| 1040 |
} |
| 1041 |
|
| 1042 |
/* New and old BlockDriverState structs for group snapshots */
|
| 1043 |
|
| 1044 |
typedef struct BlkTransactionState BlkTransactionState; |
| 1045 |
|
| 1046 |
/* Only prepare() may fail. In a single transaction, only one of commit() or
|
| 1047 |
abort() will be called, clean() will always be called if it present. */
|
| 1048 |
typedef struct BdrvActionOps { |
| 1049 |
/* Size of state struct, in bytes. */
|
| 1050 |
size_t instance_size; |
| 1051 |
/* Prepare the work, must NOT be NULL. */
|
| 1052 |
void (*prepare)(BlkTransactionState *common, Error **errp);
|
| 1053 |
/* Commit the changes, can be NULL. */
|
| 1054 |
void (*commit)(BlkTransactionState *common);
|
| 1055 |
/* Abort the changes on fail, can be NULL. */
|
| 1056 |
void (*abort)(BlkTransactionState *common);
|
| 1057 |
/* Clean up resource in the end, can be NULL. */
|
| 1058 |
void (*clean)(BlkTransactionState *common);
|
| 1059 |
} BdrvActionOps; |
| 1060 |
|
| 1061 |
/*
|
| 1062 |
* This structure must be arranged as first member in child type, assuming
|
| 1063 |
* that compiler will also arrange it to the same address with parent instance.
|
| 1064 |
* Later it will be used in free().
|
| 1065 |
*/
|
| 1066 |
struct BlkTransactionState {
|
| 1067 |
TransactionAction *action; |
| 1068 |
const BdrvActionOps *ops;
|
| 1069 |
QSIMPLEQ_ENTRY(BlkTransactionState) entry; |
| 1070 |
}; |
| 1071 |
|
| 1072 |
/* internal snapshot private data */
|
| 1073 |
typedef struct InternalSnapshotState { |
| 1074 |
BlkTransactionState common; |
| 1075 |
BlockDriverState *bs; |
| 1076 |
QEMUSnapshotInfo sn; |
| 1077 |
} InternalSnapshotState; |
| 1078 |
|
| 1079 |
static void internal_snapshot_prepare(BlkTransactionState *common, |
| 1080 |
Error **errp) |
| 1081 |
{
|
| 1082 |
const char *device; |
| 1083 |
const char *name; |
| 1084 |
BlockDriverState *bs; |
| 1085 |
QEMUSnapshotInfo old_sn, *sn; |
| 1086 |
bool ret;
|
| 1087 |
qemu_timeval tv; |
| 1088 |
BlockdevSnapshotInternal *internal; |
| 1089 |
InternalSnapshotState *state; |
| 1090 |
int ret1;
|
| 1091 |
|
| 1092 |
g_assert(common->action->kind == |
| 1093 |
TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); |
| 1094 |
internal = common->action->blockdev_snapshot_internal_sync; |
| 1095 |
state = DO_UPCAST(InternalSnapshotState, common, common); |
| 1096 |
|
| 1097 |
/* 1. parse input */
|
| 1098 |
device = internal->device; |
| 1099 |
name = internal->name; |
| 1100 |
|
| 1101 |
/* 2. check for validation */
|
| 1102 |
bs = bdrv_find(device); |
| 1103 |
if (!bs) {
|
| 1104 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1105 |
return;
|
| 1106 |
} |
| 1107 |
|
| 1108 |
if (!bdrv_is_inserted(bs)) {
|
| 1109 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
| 1110 |
return;
|
| 1111 |
} |
| 1112 |
|
| 1113 |
if (bdrv_is_read_only(bs)) {
|
| 1114 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
| 1115 |
return;
|
| 1116 |
} |
| 1117 |
|
| 1118 |
if (!bdrv_can_snapshot(bs)) {
|
| 1119 |
error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, |
| 1120 |
bs->drv->format_name, device, "internal snapshot");
|
| 1121 |
return;
|
| 1122 |
} |
| 1123 |
|
| 1124 |
if (!strlen(name)) {
|
| 1125 |
error_setg(errp, "Name is empty");
|
| 1126 |
return;
|
| 1127 |
} |
| 1128 |
|
| 1129 |
/* check whether a snapshot with name exist */
|
| 1130 |
ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, errp);
|
| 1131 |
if (error_is_set(errp)) {
|
| 1132 |
return;
|
| 1133 |
} else if (ret) { |
| 1134 |
error_setg(errp, |
| 1135 |
"Snapshot with name '%s' already exists on device '%s'",
|
| 1136 |
name, device); |
| 1137 |
return;
|
| 1138 |
} |
| 1139 |
|
| 1140 |
/* 3. take the snapshot */
|
| 1141 |
sn = &state->sn; |
| 1142 |
pstrcpy(sn->name, sizeof(sn->name), name);
|
| 1143 |
qemu_gettimeofday(&tv); |
| 1144 |
sn->date_sec = tv.tv_sec; |
| 1145 |
sn->date_nsec = tv.tv_usec * 1000;
|
| 1146 |
sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
| 1147 |
|
| 1148 |
ret1 = bdrv_snapshot_create(bs, sn); |
| 1149 |
if (ret1 < 0) { |
| 1150 |
error_setg_errno(errp, -ret1, |
| 1151 |
"Failed to create snapshot '%s' on device '%s'",
|
| 1152 |
name, device); |
| 1153 |
return;
|
| 1154 |
} |
| 1155 |
|
| 1156 |
/* 4. succeed, mark a snapshot is created */
|
| 1157 |
state->bs = bs; |
| 1158 |
} |
| 1159 |
|
| 1160 |
static void internal_snapshot_abort(BlkTransactionState *common) |
| 1161 |
{
|
| 1162 |
InternalSnapshotState *state = |
| 1163 |
DO_UPCAST(InternalSnapshotState, common, common); |
| 1164 |
BlockDriverState *bs = state->bs; |
| 1165 |
QEMUSnapshotInfo *sn = &state->sn; |
| 1166 |
Error *local_error = NULL;
|
| 1167 |
|
| 1168 |
if (!bs) {
|
| 1169 |
return;
|
| 1170 |
} |
| 1171 |
|
| 1172 |
if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { |
| 1173 |
error_report("Failed to delete snapshot with id '%s' and name '%s' on "
|
| 1174 |
"device '%s' in abort: %s",
|
| 1175 |
sn->id_str, |
| 1176 |
sn->name, |
| 1177 |
bdrv_get_device_name(bs), |
| 1178 |
error_get_pretty(local_error)); |
| 1179 |
error_free(local_error); |
| 1180 |
} |
| 1181 |
} |
| 1182 |
|
| 1183 |
/* external snapshot private data */
|
| 1184 |
typedef struct ExternalSnapshotState { |
| 1185 |
BlkTransactionState common; |
| 1186 |
BlockDriverState *old_bs; |
| 1187 |
BlockDriverState *new_bs; |
| 1188 |
} ExternalSnapshotState; |
| 1189 |
|
| 1190 |
static void external_snapshot_prepare(BlkTransactionState *common, |
| 1191 |
Error **errp) |
| 1192 |
{
|
| 1193 |
BlockDriver *drv; |
| 1194 |
int flags, ret;
|
| 1195 |
Error *local_err = NULL;
|
| 1196 |
const char *device; |
| 1197 |
const char *new_image_file; |
| 1198 |
const char *format = "qcow2"; |
| 1199 |
enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
| 1200 |
ExternalSnapshotState *state = |
| 1201 |
DO_UPCAST(ExternalSnapshotState, common, common); |
| 1202 |
TransactionAction *action = common->action; |
| 1203 |
|
| 1204 |
/* get parameters */
|
| 1205 |
g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); |
| 1206 |
|
| 1207 |
device = action->blockdev_snapshot_sync->device; |
| 1208 |
new_image_file = action->blockdev_snapshot_sync->snapshot_file; |
| 1209 |
if (action->blockdev_snapshot_sync->has_format) {
|
| 1210 |
format = action->blockdev_snapshot_sync->format; |
| 1211 |
} |
| 1212 |
if (action->blockdev_snapshot_sync->has_mode) {
|
| 1213 |
mode = action->blockdev_snapshot_sync->mode; |
| 1214 |
} |
| 1215 |
|
| 1216 |
/* start processing */
|
| 1217 |
drv = bdrv_find_format(format); |
| 1218 |
if (!drv) {
|
| 1219 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
| 1220 |
return;
|
| 1221 |
} |
| 1222 |
|
| 1223 |
state->old_bs = bdrv_find(device); |
| 1224 |
if (!state->old_bs) {
|
| 1225 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1226 |
return;
|
| 1227 |
} |
| 1228 |
|
| 1229 |
if (!bdrv_is_inserted(state->old_bs)) {
|
| 1230 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
| 1231 |
return;
|
| 1232 |
} |
| 1233 |
|
| 1234 |
if (bdrv_in_use(state->old_bs)) {
|
| 1235 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
| 1236 |
return;
|
| 1237 |
} |
| 1238 |
|
| 1239 |
if (!bdrv_is_read_only(state->old_bs)) {
|
| 1240 |
if (bdrv_flush(state->old_bs)) {
|
| 1241 |
error_set(errp, QERR_IO_ERROR); |
| 1242 |
return;
|
| 1243 |
} |
| 1244 |
} |
| 1245 |
|
| 1246 |
if (!bdrv_is_first_non_filter(state->old_bs)) {
|
| 1247 |
error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
|
| 1248 |
return;
|
| 1249 |
} |
| 1250 |
|
| 1251 |
flags = state->old_bs->open_flags; |
| 1252 |
|
| 1253 |
/* create new image w/backing file */
|
| 1254 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
| 1255 |
bdrv_img_create(new_image_file, format, |
| 1256 |
state->old_bs->filename, |
| 1257 |
state->old_bs->drv->format_name, |
| 1258 |
NULL, -1, flags, &local_err, false); |
| 1259 |
if (error_is_set(&local_err)) {
|
| 1260 |
error_propagate(errp, local_err); |
| 1261 |
return;
|
| 1262 |
} |
| 1263 |
} |
| 1264 |
|
| 1265 |
/* We will manually add the backing_hd field to the bs later */
|
| 1266 |
state->new_bs = bdrv_new("");
|
| 1267 |
/* TODO Inherit bs->options or only take explicit options with an
|
| 1268 |
* extended QMP command? */
|
| 1269 |
ret = bdrv_open(state->new_bs, new_image_file, NULL,
|
| 1270 |
flags | BDRV_O_NO_BACKING, drv, &local_err); |
| 1271 |
if (ret != 0) { |
| 1272 |
error_propagate(errp, local_err); |
| 1273 |
} |
| 1274 |
} |
| 1275 |
|
| 1276 |
static void external_snapshot_commit(BlkTransactionState *common) |
| 1277 |
{
|
| 1278 |
ExternalSnapshotState *state = |
| 1279 |
DO_UPCAST(ExternalSnapshotState, common, common); |
| 1280 |
|
| 1281 |
/* This removes our old bs and adds the new bs */
|
| 1282 |
bdrv_append(state->new_bs, state->old_bs); |
| 1283 |
/* We don't need (or want) to use the transactional
|
| 1284 |
* bdrv_reopen_multiple() across all the entries at once, because we
|
| 1285 |
* don't want to abort all of them if one of them fails the reopen */
|
| 1286 |
bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, |
| 1287 |
NULL);
|
| 1288 |
} |
| 1289 |
|
| 1290 |
static void external_snapshot_abort(BlkTransactionState *common) |
| 1291 |
{
|
| 1292 |
ExternalSnapshotState *state = |
| 1293 |
DO_UPCAST(ExternalSnapshotState, common, common); |
| 1294 |
if (state->new_bs) {
|
| 1295 |
bdrv_unref(state->new_bs); |
| 1296 |
} |
| 1297 |
} |
| 1298 |
|
| 1299 |
typedef struct DriveBackupState { |
| 1300 |
BlkTransactionState common; |
| 1301 |
BlockDriverState *bs; |
| 1302 |
BlockJob *job; |
| 1303 |
} DriveBackupState; |
| 1304 |
|
| 1305 |
static void drive_backup_prepare(BlkTransactionState *common, Error **errp) |
| 1306 |
{
|
| 1307 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
| 1308 |
DriveBackup *backup; |
| 1309 |
Error *local_err = NULL;
|
| 1310 |
|
| 1311 |
assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
| 1312 |
backup = common->action->drive_backup; |
| 1313 |
|
| 1314 |
qmp_drive_backup(backup->device, backup->target, |
| 1315 |
backup->has_format, backup->format, |
| 1316 |
backup->sync, |
| 1317 |
backup->has_mode, backup->mode, |
| 1318 |
backup->has_speed, backup->speed, |
| 1319 |
backup->has_on_source_error, backup->on_source_error, |
| 1320 |
backup->has_on_target_error, backup->on_target_error, |
| 1321 |
&local_err); |
| 1322 |
if (error_is_set(&local_err)) {
|
| 1323 |
error_propagate(errp, local_err); |
| 1324 |
state->bs = NULL;
|
| 1325 |
state->job = NULL;
|
| 1326 |
return;
|
| 1327 |
} |
| 1328 |
|
| 1329 |
state->bs = bdrv_find(backup->device); |
| 1330 |
state->job = state->bs->job; |
| 1331 |
} |
| 1332 |
|
| 1333 |
static void drive_backup_abort(BlkTransactionState *common) |
| 1334 |
{
|
| 1335 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
| 1336 |
BlockDriverState *bs = state->bs; |
| 1337 |
|
| 1338 |
/* Only cancel if it's the job we started */
|
| 1339 |
if (bs && bs->job && bs->job == state->job) {
|
| 1340 |
block_job_cancel_sync(bs->job); |
| 1341 |
} |
| 1342 |
} |
| 1343 |
|
| 1344 |
static void abort_prepare(BlkTransactionState *common, Error **errp) |
| 1345 |
{
|
| 1346 |
error_setg(errp, "Transaction aborted using Abort action");
|
| 1347 |
} |
| 1348 |
|
| 1349 |
static void abort_commit(BlkTransactionState *common) |
| 1350 |
{
|
| 1351 |
g_assert_not_reached(); /* this action never succeeds */
|
| 1352 |
} |
| 1353 |
|
| 1354 |
static const BdrvActionOps actions[] = { |
| 1355 |
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
|
| 1356 |
.instance_size = sizeof(ExternalSnapshotState),
|
| 1357 |
.prepare = external_snapshot_prepare, |
| 1358 |
.commit = external_snapshot_commit, |
| 1359 |
.abort = external_snapshot_abort, |
| 1360 |
}, |
| 1361 |
[TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
|
| 1362 |
.instance_size = sizeof(DriveBackupState),
|
| 1363 |
.prepare = drive_backup_prepare, |
| 1364 |
.abort = drive_backup_abort, |
| 1365 |
}, |
| 1366 |
[TRANSACTION_ACTION_KIND_ABORT] = {
|
| 1367 |
.instance_size = sizeof(BlkTransactionState),
|
| 1368 |
.prepare = abort_prepare, |
| 1369 |
.commit = abort_commit, |
| 1370 |
}, |
| 1371 |
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
|
| 1372 |
.instance_size = sizeof(InternalSnapshotState),
|
| 1373 |
.prepare = internal_snapshot_prepare, |
| 1374 |
.abort = internal_snapshot_abort, |
| 1375 |
}, |
| 1376 |
}; |
| 1377 |
|
| 1378 |
/*
|
| 1379 |
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
| 1380 |
* then we do not pivot any of the devices in the group, and abandon the
|
| 1381 |
* snapshots
|
| 1382 |
*/
|
| 1383 |
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
|
| 1384 |
{
|
| 1385 |
TransactionActionList *dev_entry = dev_list; |
| 1386 |
BlkTransactionState *state, *next; |
| 1387 |
Error *local_err = NULL;
|
| 1388 |
|
| 1389 |
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; |
| 1390 |
QSIMPLEQ_INIT(&snap_bdrv_states); |
| 1391 |
|
| 1392 |
/* drain all i/o before any snapshots */
|
| 1393 |
bdrv_drain_all(); |
| 1394 |
|
| 1395 |
/* We don't do anything in this loop that commits us to the snapshot */
|
| 1396 |
while (NULL != dev_entry) { |
| 1397 |
TransactionAction *dev_info = NULL;
|
| 1398 |
const BdrvActionOps *ops;
|
| 1399 |
|
| 1400 |
dev_info = dev_entry->value; |
| 1401 |
dev_entry = dev_entry->next; |
| 1402 |
|
| 1403 |
assert(dev_info->kind < ARRAY_SIZE(actions)); |
| 1404 |
|
| 1405 |
ops = &actions[dev_info->kind]; |
| 1406 |
assert(ops->instance_size > 0);
|
| 1407 |
|
| 1408 |
state = g_malloc0(ops->instance_size); |
| 1409 |
state->ops = ops; |
| 1410 |
state->action = dev_info; |
| 1411 |
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
| 1412 |
|
| 1413 |
state->ops->prepare(state, &local_err); |
| 1414 |
if (error_is_set(&local_err)) {
|
| 1415 |
error_propagate(errp, local_err); |
| 1416 |
goto delete_and_fail;
|
| 1417 |
} |
| 1418 |
} |
| 1419 |
|
| 1420 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
|
| 1421 |
if (state->ops->commit) {
|
| 1422 |
state->ops->commit(state); |
| 1423 |
} |
| 1424 |
} |
| 1425 |
|
| 1426 |
/* success */
|
| 1427 |
goto exit;
|
| 1428 |
|
| 1429 |
delete_and_fail:
|
| 1430 |
/*
|
| 1431 |
* failure, and it is all-or-none; abandon each new bs, and keep using
|
| 1432 |
* the original bs for all images
|
| 1433 |
*/
|
| 1434 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
|
| 1435 |
if (state->ops->abort) {
|
| 1436 |
state->ops->abort(state); |
| 1437 |
} |
| 1438 |
} |
| 1439 |
exit:
|
| 1440 |
QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
|
| 1441 |
if (state->ops->clean) {
|
| 1442 |
state->ops->clean(state); |
| 1443 |
} |
| 1444 |
g_free(state); |
| 1445 |
} |
| 1446 |
} |
| 1447 |
|
| 1448 |
|
| 1449 |
static void eject_device(BlockDriverState *bs, int force, Error **errp) |
| 1450 |
{
|
| 1451 |
if (bdrv_in_use(bs)) {
|
| 1452 |
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
| 1453 |
return;
|
| 1454 |
} |
| 1455 |
if (!bdrv_dev_has_removable_media(bs)) {
|
| 1456 |
error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
| 1457 |
return;
|
| 1458 |
} |
| 1459 |
|
| 1460 |
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
| 1461 |
bdrv_dev_eject_request(bs, force); |
| 1462 |
if (!force) {
|
| 1463 |
error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
| 1464 |
return;
|
| 1465 |
} |
| 1466 |
} |
| 1467 |
|
| 1468 |
bdrv_close(bs); |
| 1469 |
} |
| 1470 |
|
| 1471 |
void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
| 1472 |
{
|
| 1473 |
BlockDriverState *bs; |
| 1474 |
|
| 1475 |
bs = bdrv_find(device); |
| 1476 |
if (!bs) {
|
| 1477 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1478 |
return;
|
| 1479 |
} |
| 1480 |
|
| 1481 |
eject_device(bs, force, errp); |
| 1482 |
} |
| 1483 |
|
| 1484 |
void qmp_block_passwd(bool has_device, const char *device, |
| 1485 |
bool has_node_name, const char *node_name, |
| 1486 |
const char *password, Error **errp) |
| 1487 |
{
|
| 1488 |
Error *local_err = NULL;
|
| 1489 |
BlockDriverState *bs; |
| 1490 |
int err;
|
| 1491 |
|
| 1492 |
bs = bdrv_lookup_bs(has_device ? device : NULL,
|
| 1493 |
has_node_name ? node_name : NULL,
|
| 1494 |
&local_err); |
| 1495 |
if (error_is_set(&local_err)) {
|
| 1496 |
error_propagate(errp, local_err); |
| 1497 |
return;
|
| 1498 |
} |
| 1499 |
|
| 1500 |
err = bdrv_set_key(bs, password); |
| 1501 |
if (err == -EINVAL) {
|
| 1502 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
| 1503 |
return;
|
| 1504 |
} else if (err < 0) { |
| 1505 |
error_set(errp, QERR_INVALID_PASSWORD); |
| 1506 |
return;
|
| 1507 |
} |
| 1508 |
} |
| 1509 |
|
| 1510 |
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
| 1511 |
int bdrv_flags, BlockDriver *drv,
|
| 1512 |
const char *password, Error **errp) |
| 1513 |
{
|
| 1514 |
Error *local_err = NULL;
|
| 1515 |
int ret;
|
| 1516 |
|
| 1517 |
ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv, &local_err);
|
| 1518 |
if (ret < 0) { |
| 1519 |
error_propagate(errp, local_err); |
| 1520 |
return;
|
| 1521 |
} |
| 1522 |
|
| 1523 |
if (bdrv_key_required(bs)) {
|
| 1524 |
if (password) {
|
| 1525 |
if (bdrv_set_key(bs, password) < 0) { |
| 1526 |
error_set(errp, QERR_INVALID_PASSWORD); |
| 1527 |
} |
| 1528 |
} else {
|
| 1529 |
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), |
| 1530 |
bdrv_get_encrypted_filename(bs)); |
| 1531 |
} |
| 1532 |
} else if (password) { |
| 1533 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
| 1534 |
} |
| 1535 |
} |
| 1536 |
|
| 1537 |
void qmp_change_blockdev(const char *device, const char *filename, |
| 1538 |
const char *format, Error **errp) |
| 1539 |
{
|
| 1540 |
BlockDriverState *bs; |
| 1541 |
BlockDriver *drv = NULL;
|
| 1542 |
int bdrv_flags;
|
| 1543 |
Error *err = NULL;
|
| 1544 |
|
| 1545 |
bs = bdrv_find(device); |
| 1546 |
if (!bs) {
|
| 1547 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1548 |
return;
|
| 1549 |
} |
| 1550 |
|
| 1551 |
if (format) {
|
| 1552 |
drv = bdrv_find_whitelisted_format(format, bs->read_only); |
| 1553 |
if (!drv) {
|
| 1554 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
| 1555 |
return;
|
| 1556 |
} |
| 1557 |
} |
| 1558 |
|
| 1559 |
eject_device(bs, 0, &err);
|
| 1560 |
if (error_is_set(&err)) {
|
| 1561 |
error_propagate(errp, err); |
| 1562 |
return;
|
| 1563 |
} |
| 1564 |
|
| 1565 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
| 1566 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
| 1567 |
|
| 1568 |
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
| 1569 |
} |
| 1570 |
|
| 1571 |
/* throttling disk I/O limits */
|
| 1572 |
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
| 1573 |
int64_t bps_wr, |
| 1574 |
int64_t iops, |
| 1575 |
int64_t iops_rd, |
| 1576 |
int64_t iops_wr, |
| 1577 |
bool has_bps_max,
|
| 1578 |
int64_t bps_max, |
| 1579 |
bool has_bps_rd_max,
|
| 1580 |
int64_t bps_rd_max, |
| 1581 |
bool has_bps_wr_max,
|
| 1582 |
int64_t bps_wr_max, |
| 1583 |
bool has_iops_max,
|
| 1584 |
int64_t iops_max, |
| 1585 |
bool has_iops_rd_max,
|
| 1586 |
int64_t iops_rd_max, |
| 1587 |
bool has_iops_wr_max,
|
| 1588 |
int64_t iops_wr_max, |
| 1589 |
bool has_iops_size,
|
| 1590 |
int64_t iops_size, Error **errp) |
| 1591 |
{
|
| 1592 |
ThrottleConfig cfg; |
| 1593 |
BlockDriverState *bs; |
| 1594 |
|
| 1595 |
bs = bdrv_find(device); |
| 1596 |
if (!bs) {
|
| 1597 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1598 |
return;
|
| 1599 |
} |
| 1600 |
|
| 1601 |
memset(&cfg, 0, sizeof(cfg)); |
| 1602 |
cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps; |
| 1603 |
cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd; |
| 1604 |
cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr; |
| 1605 |
|
| 1606 |
cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops; |
| 1607 |
cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd; |
| 1608 |
cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr; |
| 1609 |
|
| 1610 |
if (has_bps_max) {
|
| 1611 |
cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max; |
| 1612 |
} |
| 1613 |
if (has_bps_rd_max) {
|
| 1614 |
cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max; |
| 1615 |
} |
| 1616 |
if (has_bps_wr_max) {
|
| 1617 |
cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max; |
| 1618 |
} |
| 1619 |
if (has_iops_max) {
|
| 1620 |
cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max; |
| 1621 |
} |
| 1622 |
if (has_iops_rd_max) {
|
| 1623 |
cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max; |
| 1624 |
} |
| 1625 |
if (has_iops_wr_max) {
|
| 1626 |
cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max; |
| 1627 |
} |
| 1628 |
|
| 1629 |
if (has_iops_size) {
|
| 1630 |
cfg.op_size = iops_size; |
| 1631 |
} |
| 1632 |
|
| 1633 |
if (!check_throttle_config(&cfg, errp)) {
|
| 1634 |
return;
|
| 1635 |
} |
| 1636 |
|
| 1637 |
if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
|
| 1638 |
bdrv_io_limits_enable(bs); |
| 1639 |
} else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) { |
| 1640 |
bdrv_io_limits_disable(bs); |
| 1641 |
} |
| 1642 |
|
| 1643 |
if (bs->io_limits_enabled) {
|
| 1644 |
bdrv_set_io_limits(bs, &cfg); |
| 1645 |
} |
| 1646 |
} |
| 1647 |
|
| 1648 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 1649 |
{
|
| 1650 |
const char *id = qdict_get_str(qdict, "id"); |
| 1651 |
BlockDriverState *bs; |
| 1652 |
|
| 1653 |
bs = bdrv_find(id); |
| 1654 |
if (!bs) {
|
| 1655 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
| 1656 |
return -1; |
| 1657 |
} |
| 1658 |
if (bdrv_in_use(bs)) {
|
| 1659 |
qerror_report(QERR_DEVICE_IN_USE, id); |
| 1660 |
return -1; |
| 1661 |
} |
| 1662 |
|
| 1663 |
/* quiesce block driver; prevent further io */
|
| 1664 |
bdrv_drain_all(); |
| 1665 |
bdrv_flush(bs); |
| 1666 |
bdrv_close(bs); |
| 1667 |
|
| 1668 |
/* if we have a device attached to this BlockDriverState
|
| 1669 |
* then we need to make the drive anonymous until the device
|
| 1670 |
* can be removed. If this is a drive with no device backing
|
| 1671 |
* then we can just get rid of the block driver state right here.
|
| 1672 |
*/
|
| 1673 |
if (bdrv_get_attached_dev(bs)) {
|
| 1674 |
bdrv_make_anon(bs); |
| 1675 |
|
| 1676 |
/* Further I/O must not pause the guest */
|
| 1677 |
bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, |
| 1678 |
BLOCKDEV_ON_ERROR_REPORT); |
| 1679 |
} else {
|
| 1680 |
drive_uninit(drive_get_by_blockdev(bs)); |
| 1681 |
} |
| 1682 |
|
| 1683 |
return 0; |
| 1684 |
} |
| 1685 |
|
| 1686 |
void qmp_block_resize(const char *device, int64_t size, Error **errp) |
| 1687 |
{
|
| 1688 |
BlockDriverState *bs; |
| 1689 |
int ret;
|
| 1690 |
|
| 1691 |
bs = bdrv_find(device); |
| 1692 |
if (!bs) {
|
| 1693 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1694 |
return;
|
| 1695 |
} |
| 1696 |
|
| 1697 |
if (size < 0) { |
| 1698 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
| 1699 |
return;
|
| 1700 |
} |
| 1701 |
|
| 1702 |
/* complete all in-flight operations before resizing the device */
|
| 1703 |
bdrv_drain_all(); |
| 1704 |
|
| 1705 |
ret = bdrv_truncate(bs, size); |
| 1706 |
switch (ret) {
|
| 1707 |
case 0: |
| 1708 |
break;
|
| 1709 |
case -ENOMEDIUM:
|
| 1710 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
| 1711 |
break;
|
| 1712 |
case -ENOTSUP:
|
| 1713 |
error_set(errp, QERR_UNSUPPORTED); |
| 1714 |
break;
|
| 1715 |
case -EACCES:
|
| 1716 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
| 1717 |
break;
|
| 1718 |
case -EBUSY:
|
| 1719 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
| 1720 |
break;
|
| 1721 |
default:
|
| 1722 |
error_setg_errno(errp, -ret, "Could not resize");
|
| 1723 |
break;
|
| 1724 |
} |
| 1725 |
} |
| 1726 |
|
| 1727 |
static void block_job_cb(void *opaque, int ret) |
| 1728 |
{
|
| 1729 |
BlockDriverState *bs = opaque; |
| 1730 |
QObject *obj; |
| 1731 |
|
| 1732 |
trace_block_job_cb(bs, bs->job, ret); |
| 1733 |
|
| 1734 |
assert(bs->job); |
| 1735 |
obj = qobject_from_block_job(bs->job); |
| 1736 |
if (ret < 0) { |
| 1737 |
QDict *dict = qobject_to_qdict(obj); |
| 1738 |
qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
|
| 1739 |
} |
| 1740 |
|
| 1741 |
if (block_job_is_cancelled(bs->job)) {
|
| 1742 |
monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); |
| 1743 |
} else {
|
| 1744 |
monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); |
| 1745 |
} |
| 1746 |
qobject_decref(obj); |
| 1747 |
|
| 1748 |
bdrv_put_ref_bh_schedule(bs); |
| 1749 |
} |
| 1750 |
|
| 1751 |
void qmp_block_stream(const char *device, bool has_base, |
| 1752 |
const char *base, bool has_speed, int64_t speed, |
| 1753 |
bool has_on_error, BlockdevOnError on_error,
|
| 1754 |
Error **errp) |
| 1755 |
{
|
| 1756 |
BlockDriverState *bs; |
| 1757 |
BlockDriverState *base_bs = NULL;
|
| 1758 |
Error *local_err = NULL;
|
| 1759 |
|
| 1760 |
if (!has_on_error) {
|
| 1761 |
on_error = BLOCKDEV_ON_ERROR_REPORT; |
| 1762 |
} |
| 1763 |
|
| 1764 |
bs = bdrv_find(device); |
| 1765 |
if (!bs) {
|
| 1766 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1767 |
return;
|
| 1768 |
} |
| 1769 |
|
| 1770 |
if (base) {
|
| 1771 |
base_bs = bdrv_find_backing_image(bs, base); |
| 1772 |
if (base_bs == NULL) { |
| 1773 |
error_set(errp, QERR_BASE_NOT_FOUND, base); |
| 1774 |
return;
|
| 1775 |
} |
| 1776 |
} |
| 1777 |
|
| 1778 |
stream_start(bs, base_bs, base, has_speed ? speed : 0,
|
| 1779 |
on_error, block_job_cb, bs, &local_err); |
| 1780 |
if (error_is_set(&local_err)) {
|
| 1781 |
error_propagate(errp, local_err); |
| 1782 |
return;
|
| 1783 |
} |
| 1784 |
|
| 1785 |
trace_qmp_block_stream(bs, bs->job); |
| 1786 |
} |
| 1787 |
|
| 1788 |
void qmp_block_commit(const char *device, |
| 1789 |
bool has_base, const char *base, const char *top, |
| 1790 |
bool has_speed, int64_t speed,
|
| 1791 |
Error **errp) |
| 1792 |
{
|
| 1793 |
BlockDriverState *bs; |
| 1794 |
BlockDriverState *base_bs, *top_bs; |
| 1795 |
Error *local_err = NULL;
|
| 1796 |
/* This will be part of the QMP command, if/when the
|
| 1797 |
* BlockdevOnError change for blkmirror makes it in
|
| 1798 |
*/
|
| 1799 |
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
| 1800 |
|
| 1801 |
/* drain all i/o before commits */
|
| 1802 |
bdrv_drain_all(); |
| 1803 |
|
| 1804 |
bs = bdrv_find(device); |
| 1805 |
if (!bs) {
|
| 1806 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1807 |
return;
|
| 1808 |
} |
| 1809 |
|
| 1810 |
/* default top_bs is the active layer */
|
| 1811 |
top_bs = bs; |
| 1812 |
|
| 1813 |
if (top) {
|
| 1814 |
if (strcmp(bs->filename, top) != 0) { |
| 1815 |
top_bs = bdrv_find_backing_image(bs, top); |
| 1816 |
} |
| 1817 |
} |
| 1818 |
|
| 1819 |
if (top_bs == NULL) { |
| 1820 |
error_setg(errp, "Top image file %s not found", top ? top : "NULL"); |
| 1821 |
return;
|
| 1822 |
} |
| 1823 |
|
| 1824 |
if (has_base && base) {
|
| 1825 |
base_bs = bdrv_find_backing_image(top_bs, base); |
| 1826 |
} else {
|
| 1827 |
base_bs = bdrv_find_base(top_bs); |
| 1828 |
} |
| 1829 |
|
| 1830 |
if (base_bs == NULL) { |
| 1831 |
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
| 1832 |
return;
|
| 1833 |
} |
| 1834 |
|
| 1835 |
if (top_bs == bs) {
|
| 1836 |
commit_active_start(bs, base_bs, speed, on_error, block_job_cb, |
| 1837 |
bs, &local_err); |
| 1838 |
} else {
|
| 1839 |
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, |
| 1840 |
&local_err); |
| 1841 |
} |
| 1842 |
if (local_err != NULL) { |
| 1843 |
error_propagate(errp, local_err); |
| 1844 |
return;
|
| 1845 |
} |
| 1846 |
} |
| 1847 |
|
| 1848 |
void qmp_drive_backup(const char *device, const char *target, |
| 1849 |
bool has_format, const char *format, |
| 1850 |
enum MirrorSyncMode sync,
|
| 1851 |
bool has_mode, enum NewImageMode mode, |
| 1852 |
bool has_speed, int64_t speed,
|
| 1853 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
| 1854 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
| 1855 |
Error **errp) |
| 1856 |
{
|
| 1857 |
BlockDriverState *bs; |
| 1858 |
BlockDriverState *target_bs; |
| 1859 |
BlockDriverState *source = NULL;
|
| 1860 |
BlockDriver *drv = NULL;
|
| 1861 |
Error *local_err = NULL;
|
| 1862 |
int flags;
|
| 1863 |
int64_t size; |
| 1864 |
int ret;
|
| 1865 |
|
| 1866 |
if (!has_speed) {
|
| 1867 |
speed = 0;
|
| 1868 |
} |
| 1869 |
if (!has_on_source_error) {
|
| 1870 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
| 1871 |
} |
| 1872 |
if (!has_on_target_error) {
|
| 1873 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
| 1874 |
} |
| 1875 |
if (!has_mode) {
|
| 1876 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
| 1877 |
} |
| 1878 |
|
| 1879 |
bs = bdrv_find(device); |
| 1880 |
if (!bs) {
|
| 1881 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 1882 |
return;
|
| 1883 |
} |
| 1884 |
|
| 1885 |
if (!bdrv_is_inserted(bs)) {
|
| 1886 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
| 1887 |
return;
|
| 1888 |
} |
| 1889 |
|
| 1890 |
if (!has_format) {
|
| 1891 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
| 1892 |
} |
| 1893 |
if (format) {
|
| 1894 |
drv = bdrv_find_format(format); |
| 1895 |
if (!drv) {
|
| 1896 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
| 1897 |
return;
|
| 1898 |
} |
| 1899 |
} |
| 1900 |
|
| 1901 |
if (bdrv_in_use(bs)) {
|
| 1902 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
| 1903 |
return;
|
| 1904 |
} |
| 1905 |
|
| 1906 |
flags = bs->open_flags | BDRV_O_RDWR; |
| 1907 |
|
| 1908 |
/* See if we have a backing HD we can use to create our new image
|
| 1909 |
* on top of. */
|
| 1910 |
if (sync == MIRROR_SYNC_MODE_TOP) {
|
| 1911 |
source = bs->backing_hd; |
| 1912 |
if (!source) {
|
| 1913 |
sync = MIRROR_SYNC_MODE_FULL; |
| 1914 |
} |
| 1915 |
} |
| 1916 |
if (sync == MIRROR_SYNC_MODE_NONE) {
|
| 1917 |
source = bs; |
| 1918 |
} |
| 1919 |
|
| 1920 |
size = bdrv_getlength(bs); |
| 1921 |
if (size < 0) { |
| 1922 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
| 1923 |
return;
|
| 1924 |
} |
| 1925 |
|
| 1926 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
| 1927 |
assert(format && drv); |
| 1928 |
if (source) {
|
| 1929 |
bdrv_img_create(target, format, source->filename, |
| 1930 |
source->drv->format_name, NULL,
|
| 1931 |
size, flags, &local_err, false);
|
| 1932 |
} else {
|
| 1933 |
bdrv_img_create(target, format, NULL, NULL, NULL, |
| 1934 |
size, flags, &local_err, false);
|
| 1935 |
} |
| 1936 |
} |
| 1937 |
|
| 1938 |
if (error_is_set(&local_err)) {
|
| 1939 |
error_propagate(errp, local_err); |
| 1940 |
return;
|
| 1941 |
} |
| 1942 |
|
| 1943 |
target_bs = bdrv_new("");
|
| 1944 |
ret = bdrv_open(target_bs, target, NULL, flags, drv, &local_err);
|
| 1945 |
if (ret < 0) { |
| 1946 |
bdrv_unref(target_bs); |
| 1947 |
error_propagate(errp, local_err); |
| 1948 |
return;
|
| 1949 |
} |
| 1950 |
|
| 1951 |
backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error, |
| 1952 |
block_job_cb, bs, &local_err); |
| 1953 |
if (local_err != NULL) { |
| 1954 |
bdrv_unref(target_bs); |
| 1955 |
error_propagate(errp, local_err); |
| 1956 |
return;
|
| 1957 |
} |
| 1958 |
} |
| 1959 |
|
| 1960 |
BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp) |
| 1961 |
{
|
| 1962 |
return bdrv_named_nodes_list();
|
| 1963 |
} |
| 1964 |
|
| 1965 |
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20) |
| 1966 |
|
| 1967 |
void qmp_drive_mirror(const char *device, const char *target, |
| 1968 |
bool has_format, const char *format, |
| 1969 |
enum MirrorSyncMode sync,
|
| 1970 |
bool has_mode, enum NewImageMode mode, |
| 1971 |
bool has_speed, int64_t speed,
|
| 1972 |
bool has_granularity, uint32_t granularity,
|
| 1973 |
bool has_buf_size, int64_t buf_size,
|
| 1974 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
| 1975 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
| 1976 |
Error **errp) |
| 1977 |
{
|
| 1978 |
BlockDriverState *bs; |
| 1979 |
BlockDriverState *source, *target_bs; |
| 1980 |
BlockDriver *drv = NULL;
|
| 1981 |
Error *local_err = NULL;
|
| 1982 |
int flags;
|
| 1983 |
int64_t size; |
| 1984 |
int ret;
|
| 1985 |
|
| 1986 |
if (!has_speed) {
|
| 1987 |
speed = 0;
|
| 1988 |
} |
| 1989 |
if (!has_on_source_error) {
|
| 1990 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
| 1991 |
} |
| 1992 |
if (!has_on_target_error) {
|
| 1993 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
| 1994 |
} |
| 1995 |
if (!has_mode) {
|
| 1996 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
| 1997 |
} |
| 1998 |
if (!has_granularity) {
|
| 1999 |
granularity = 0;
|
| 2000 |
} |
| 2001 |
if (!has_buf_size) {
|
| 2002 |
buf_size = DEFAULT_MIRROR_BUF_SIZE; |
| 2003 |
} |
| 2004 |
|
| 2005 |
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
| 2006 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
| 2007 |
return;
|
| 2008 |
} |
| 2009 |
if (granularity & (granularity - 1)) { |
| 2010 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
| 2011 |
return;
|
| 2012 |
} |
| 2013 |
|
| 2014 |
bs = bdrv_find(device); |
| 2015 |
if (!bs) {
|
| 2016 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| 2017 |
return;
|
| 2018 |
} |
| 2019 |
|
| 2020 |
if (!bdrv_is_inserted(bs)) {
|
| 2021 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
| 2022 |
return;
|
| 2023 |
} |
| 2024 |
|
| 2025 |
if (!has_format) {
|
| 2026 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
| 2027 |
} |
| 2028 |
if (format) {
|
| 2029 |
drv = bdrv_find_format(format); |
| 2030 |
if (!drv) {
|
| 2031 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
| 2032 |
return;
|
| 2033 |
} |
| 2034 |
} |
| 2035 |
|
| 2036 |
if (bdrv_in_use(bs)) {
|
| 2037 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
| 2038 |
return;
|
| 2039 |
} |
| 2040 |
|
| 2041 |
flags = bs->open_flags | BDRV_O_RDWR; |
| 2042 |
source = bs->backing_hd; |
| 2043 |
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
| 2044 |
sync = MIRROR_SYNC_MODE_FULL; |
| 2045 |
} |
| 2046 |
if (sync == MIRROR_SYNC_MODE_NONE) {
|
| 2047 |
source = bs; |
| 2048 |
} |
| 2049 |
|
| 2050 |
size = bdrv_getlength(bs); |
| 2051 |
if (size < 0) { |
| 2052 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
| 2053 |
return;
|
| 2054 |
} |
| 2055 |
|
| 2056 |
if ((sync == MIRROR_SYNC_MODE_FULL || !source)
|
| 2057 |
&& mode != NEW_IMAGE_MODE_EXISTING) |
| 2058 |
{
|
| 2059 |
/* create new image w/o backing file */
|
| 2060 |
assert(format && drv); |
| 2061 |
bdrv_img_create(target, format, |
| 2062 |
NULL, NULL, NULL, size, flags, &local_err, false); |
| 2063 |
} else {
|
| 2064 |
switch (mode) {
|
| 2065 |
case NEW_IMAGE_MODE_EXISTING:
|
| 2066 |
break;
|
| 2067 |
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
| 2068 |
/* create new image with backing file */
|
| 2069 |
bdrv_img_create(target, format, |
| 2070 |
source->filename, |
| 2071 |
source->drv->format_name, |
| 2072 |
NULL, size, flags, &local_err, false); |
| 2073 |
break;
|
| 2074 |
default:
|
| 2075 |
abort(); |
| 2076 |
} |
| 2077 |
} |
| 2078 |
|
| 2079 |
if (error_is_set(&local_err)) {
|
| 2080 |
error_propagate(errp, local_err); |
| 2081 |
return;
|
| 2082 |
} |
| 2083 |
|
| 2084 |
/* Mirroring takes care of copy-on-write using the source's backing
|
| 2085 |
* file.
|
| 2086 |
*/
|
| 2087 |
target_bs = bdrv_new("");
|
| 2088 |
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv,
|
| 2089 |
&local_err); |
| 2090 |
if (ret < 0) { |
| 2091 |
bdrv_unref(target_bs); |
| 2092 |
error_propagate(errp, local_err); |
| 2093 |
return;
|
| 2094 |
} |
| 2095 |
|
| 2096 |
mirror_start(bs, target_bs, speed, granularity, buf_size, sync, |
| 2097 |
on_source_error, on_target_error, |
| 2098 |
block_job_cb, bs, &local_err); |
| 2099 |
if (local_err != NULL) { |
| 2100 |
bdrv_unref(target_bs); |
| 2101 |
error_propagate(errp, local_err); |
| 2102 |
return;
|
| 2103 |
} |
| 2104 |
} |
| 2105 |
|
| 2106 |
static BlockJob *find_block_job(const char *device) |
| 2107 |
{
|
| 2108 |
BlockDriverState *bs; |
| 2109 |
|
| 2110 |
bs = bdrv_find(device); |
| 2111 |
if (!bs || !bs->job) {
|
| 2112 |
return NULL; |
| 2113 |
} |
| 2114 |
return bs->job;
|
| 2115 |
} |
| 2116 |
|
| 2117 |
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
| 2118 |
{
|
| 2119 |
BlockJob *job = find_block_job(device); |
| 2120 |
|
| 2121 |
if (!job) {
|
| 2122 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
| 2123 |
return;
|
| 2124 |
} |
| 2125 |
|
| 2126 |
block_job_set_speed(job, speed, errp); |
| 2127 |
} |
| 2128 |
|
| 2129 |
void qmp_block_job_cancel(const char *device, |
| 2130 |
bool has_force, bool force, Error **errp) |
| 2131 |
{
|
| 2132 |
BlockJob *job = find_block_job(device); |
| 2133 |
|
| 2134 |
if (!has_force) {
|
| 2135 |
force = false;
|
| 2136 |
} |
| 2137 |
|
| 2138 |
if (!job) {
|
| 2139 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
| 2140 |
return;
|
| 2141 |
} |
| 2142 |
if (job->paused && !force) {
|
| 2143 |
error_set(errp, QERR_BLOCK_JOB_PAUSED, device); |
| 2144 |
return;
|
| 2145 |
} |
| 2146 |
|
| 2147 |
trace_qmp_block_job_cancel(job); |
| 2148 |
block_job_cancel(job); |
| 2149 |
} |
| 2150 |
|
| 2151 |
void qmp_block_job_pause(const char *device, Error **errp) |
| 2152 |
{
|
| 2153 |
BlockJob *job = find_block_job(device); |
| 2154 |
|
| 2155 |
if (!job) {
|
| 2156 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
| 2157 |
return;
|
| 2158 |
} |
| 2159 |
|
| 2160 |
trace_qmp_block_job_pause(job); |
| 2161 |
block_job_pause(job); |
| 2162 |
} |
| 2163 |
|
| 2164 |
void qmp_block_job_resume(const char *device, Error **errp) |
| 2165 |
{
|
| 2166 |
BlockJob *job = find_block_job(device); |
| 2167 |
|
| 2168 |
if (!job) {
|
| 2169 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
| 2170 |
return;
|
| 2171 |
} |
| 2172 |
|
| 2173 |
trace_qmp_block_job_resume(job); |
| 2174 |
block_job_resume(job); |
| 2175 |
} |
| 2176 |
|
| 2177 |
void qmp_block_job_complete(const char *device, Error **errp) |
| 2178 |
{
|
| 2179 |
BlockJob *job = find_block_job(device); |
| 2180 |
|
| 2181 |
if (!job) {
|
| 2182 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
| 2183 |
return;
|
| 2184 |
} |
| 2185 |
|
| 2186 |
trace_qmp_block_job_complete(job); |
| 2187 |
block_job_complete(job, errp); |
| 2188 |
} |
| 2189 |
|
| 2190 |
void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
|
| 2191 |
{
|
| 2192 |
QmpOutputVisitor *ov = qmp_output_visitor_new(); |
| 2193 |
QObject *obj; |
| 2194 |
QDict *qdict; |
| 2195 |
Error *local_err = NULL;
|
| 2196 |
|
| 2197 |
/* Require an ID in the top level */
|
| 2198 |
if (!options->has_id) {
|
| 2199 |
error_setg(errp, "Block device needs an ID");
|
| 2200 |
goto fail;
|
| 2201 |
} |
| 2202 |
|
| 2203 |
/* TODO Sort it out in raw-posix and drive_init: Reject aio=native with
|
| 2204 |
* cache.direct=false instead of silently switching to aio=threads, except
|
| 2205 |
* if called from drive_init.
|
| 2206 |
*
|
| 2207 |
* For now, simply forbidding the combination for all drivers will do. */
|
| 2208 |
if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
|
| 2209 |
bool direct = options->cache->has_direct && options->cache->direct;
|
| 2210 |
if (!options->has_cache && !direct) {
|
| 2211 |
error_setg(errp, "aio=native requires cache.direct=true");
|
| 2212 |
goto fail;
|
| 2213 |
} |
| 2214 |
} |
| 2215 |
|
| 2216 |
visit_type_BlockdevOptions(qmp_output_get_visitor(ov), |
| 2217 |
&options, NULL, &local_err);
|
| 2218 |
if (error_is_set(&local_err)) {
|
| 2219 |
error_propagate(errp, local_err); |
| 2220 |
goto fail;
|
| 2221 |
} |
| 2222 |
|
| 2223 |
obj = qmp_output_get_qobject(ov); |
| 2224 |
qdict = qobject_to_qdict(obj); |
| 2225 |
|
| 2226 |
qdict_flatten(qdict); |
| 2227 |
|
| 2228 |
blockdev_init(NULL, qdict, IF_NONE, &local_err);
|
| 2229 |
if (error_is_set(&local_err)) {
|
| 2230 |
error_propagate(errp, local_err); |
| 2231 |
goto fail;
|
| 2232 |
} |
| 2233 |
|
| 2234 |
fail:
|
| 2235 |
qmp_output_visitor_cleanup(ov); |
| 2236 |
} |
| 2237 |
|
| 2238 |
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
| 2239 |
{
|
| 2240 |
BlockJobInfoList **prev = opaque; |
| 2241 |
BlockJob *job = bs->job; |
| 2242 |
|
| 2243 |
if (job) {
|
| 2244 |
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
| 2245 |
elem->value = block_job_query(bs->job); |
| 2246 |
(*prev)->next = elem; |
| 2247 |
*prev = elem; |
| 2248 |
} |
| 2249 |
} |
| 2250 |
|
| 2251 |
BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
| 2252 |
{
|
| 2253 |
/* Dummy is a fake list element for holding the head pointer */
|
| 2254 |
BlockJobInfoList dummy = {};
|
| 2255 |
BlockJobInfoList *prev = &dummy; |
| 2256 |
bdrv_iterate(do_qmp_query_block_jobs_one, &prev); |
| 2257 |
return dummy.next;
|
| 2258 |
} |
| 2259 |
|
| 2260 |
QemuOptsList qemu_common_drive_opts = {
|
| 2261 |
.name = "drive",
|
| 2262 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
| 2263 |
.desc = {
|
| 2264 |
{
|
| 2265 |
.name = "snapshot",
|
| 2266 |
.type = QEMU_OPT_BOOL, |
| 2267 |
.help = "enable/disable snapshot mode",
|
| 2268 |
},{
|
| 2269 |
.name = "discard",
|
| 2270 |
.type = QEMU_OPT_STRING, |
| 2271 |
.help = "discard operation (ignore/off, unmap/on)",
|
| 2272 |
},{
|
| 2273 |
.name = "cache.writeback",
|
| 2274 |
.type = QEMU_OPT_BOOL, |
| 2275 |
.help = "enables writeback mode for any caches",
|
| 2276 |
},{
|
| 2277 |
.name = "cache.direct",
|
| 2278 |
.type = QEMU_OPT_BOOL, |
| 2279 |
.help = "enables use of O_DIRECT (bypass the host page cache)",
|
| 2280 |
},{
|
| 2281 |
.name = "cache.no-flush",
|
| 2282 |
.type = QEMU_OPT_BOOL, |
| 2283 |
.help = "ignore any flush requests for the device",
|
| 2284 |
},{
|
| 2285 |
.name = "aio",
|
| 2286 |
.type = QEMU_OPT_STRING, |
| 2287 |
.help = "host AIO implementation (threads, native)",
|
| 2288 |
},{
|
| 2289 |
.name = "format",
|
| 2290 |
.type = QEMU_OPT_STRING, |
| 2291 |
.help = "disk format (raw, qcow2, ...)",
|
| 2292 |
},{
|
| 2293 |
.name = "serial",
|
| 2294 |
.type = QEMU_OPT_STRING, |
| 2295 |
.help = "disk serial number",
|
| 2296 |
},{
|
| 2297 |
.name = "rerror",
|
| 2298 |
.type = QEMU_OPT_STRING, |
| 2299 |
.help = "read error action",
|
| 2300 |
},{
|
| 2301 |
.name = "werror",
|
| 2302 |
.type = QEMU_OPT_STRING, |
| 2303 |
.help = "write error action",
|
| 2304 |
},{
|
| 2305 |
.name = "read-only",
|
| 2306 |
.type = QEMU_OPT_BOOL, |
| 2307 |
.help = "open drive file as read-only",
|
| 2308 |
},{
|
| 2309 |
.name = "throttling.iops-total",
|
| 2310 |
.type = QEMU_OPT_NUMBER, |
| 2311 |
.help = "limit total I/O operations per second",
|
| 2312 |
},{
|
| 2313 |
.name = "throttling.iops-read",
|
| 2314 |
.type = QEMU_OPT_NUMBER, |
| 2315 |
.help = "limit read operations per second",
|
| 2316 |
},{
|
| 2317 |
.name = "throttling.iops-write",
|
| 2318 |
.type = QEMU_OPT_NUMBER, |
| 2319 |
.help = "limit write operations per second",
|
| 2320 |
},{
|
| 2321 |
.name = "throttling.bps-total",
|
| 2322 |
.type = QEMU_OPT_NUMBER, |
| 2323 |
.help = "limit total bytes per second",
|
| 2324 |
},{
|
| 2325 |
.name = "throttling.bps-read",
|
| 2326 |
.type = QEMU_OPT_NUMBER, |
| 2327 |
.help = "limit read bytes per second",
|
| 2328 |
},{
|
| 2329 |
.name = "throttling.bps-write",
|
| 2330 |
.type = QEMU_OPT_NUMBER, |
| 2331 |
.help = "limit write bytes per second",
|
| 2332 |
},{
|
| 2333 |
.name = "throttling.iops-total-max",
|
| 2334 |
.type = QEMU_OPT_NUMBER, |
| 2335 |
.help = "I/O operations burst",
|
| 2336 |
},{
|
| 2337 |
.name = "throttling.iops-read-max",
|
| 2338 |
.type = QEMU_OPT_NUMBER, |
| 2339 |
.help = "I/O operations read burst",
|
| 2340 |
},{
|
| 2341 |
.name = "throttling.iops-write-max",
|
| 2342 |
.type = QEMU_OPT_NUMBER, |
| 2343 |
.help = "I/O operations write burst",
|
| 2344 |
},{
|
| 2345 |
.name = "throttling.bps-total-max",
|
| 2346 |
.type = QEMU_OPT_NUMBER, |
| 2347 |
.help = "total bytes burst",
|
| 2348 |
},{
|
| 2349 |
.name = "throttling.bps-read-max",
|
| 2350 |
.type = QEMU_OPT_NUMBER, |
| 2351 |
.help = "total bytes read burst",
|
| 2352 |
},{
|
| 2353 |
.name = "throttling.bps-write-max",
|
| 2354 |
.type = QEMU_OPT_NUMBER, |
| 2355 |
.help = "total bytes write burst",
|
| 2356 |
},{
|
| 2357 |
.name = "throttling.iops-size",
|
| 2358 |
.type = QEMU_OPT_NUMBER, |
| 2359 |
.help = "when limiting by iops max size of an I/O in bytes",
|
| 2360 |
},{
|
| 2361 |
.name = "copy-on-read",
|
| 2362 |
.type = QEMU_OPT_BOOL, |
| 2363 |
.help = "copy read data from backing file into image file",
|
| 2364 |
}, |
| 2365 |
{ /* end of list */ }
|
| 2366 |
}, |
| 2367 |
}; |
| 2368 |
|
| 2369 |
QemuOptsList qemu_drive_opts = {
|
| 2370 |
.name = "drive",
|
| 2371 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), |
| 2372 |
.desc = {
|
| 2373 |
/*
|
| 2374 |
* no elements => accept any params
|
| 2375 |
* validation will happen later
|
| 2376 |
*/
|
| 2377 |
{ /* end of list */ }
|
| 2378 |
}, |
| 2379 |
}; |