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/*
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* QEMU host block devices
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "sysemu/blockdev.h" |
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#include "hw/block/block.h" |
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#include "block/blockjob.h" |
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#include "monitor/monitor.h" |
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#include "qapi/qmp/qerror.h" |
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#include "qemu/option.h" |
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#include "qemu/config-file.h" |
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#include "qapi/qmp/types.h" |
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#include "sysemu/sysemu.h" |
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#include "block/block_int.h" |
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#include "qmp-commands.h" |
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#include "trace.h" |
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#include "sysemu/arch_init.h" |
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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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extern QemuOptsList qemu_common_drive_opts;
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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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|
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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); |
289 |
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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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} |
314 |
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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; |
340 |
const char *id; |
341 |
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translation = BIOS_ATA_TRANSLATION_AUTO; |
343 |
media = MEDIA_DISK; |
344 |
|
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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); |
348 |
opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
|
349 |
if (error_is_set(&error)) {
|
350 |
qerror_report_err(error); |
351 |
error_free(error); |
352 |
return NULL; |
353 |
} |
354 |
|
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bs_opts = qdict_new(); |
356 |
qemu_opts_to_qdict(all_opts, bs_opts); |
357 |
qemu_opts_absorb_qdict(opts, bs_opts, &error); |
358 |
if (error_is_set(&error)) {
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qerror_report_err(error); |
360 |
error_free(error); |
361 |
return NULL; |
362 |
} |
363 |
|
364 |
if (id) {
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365 |
qdict_del(bs_opts, "id");
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366 |
} |
367 |
|
368 |
/* extract parameters */
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369 |
bus_id = qemu_opt_get_number(opts, "bus", 0); |
370 |
unit_id = qemu_opt_get_number(opts, "unit", -1); |
371 |
index = qemu_opt_get_number(opts, "index", -1); |
372 |
|
373 |
cyls = qemu_opt_get_number(opts, "cyls", 0); |
374 |
heads = qemu_opt_get_number(opts, "heads", 0); |
375 |
secs = qemu_opt_get_number(opts, "secs", 0); |
376 |
|
377 |
snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
378 |
ro = qemu_opt_get_bool(opts, "readonly", 0); |
379 |
copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
380 |
|
381 |
file = qemu_opt_get(opts, "file");
|
382 |
serial = qemu_opt_get(opts, "serial");
|
383 |
|
384 |
if ((buf = qemu_opt_get(opts, "if")) != NULL) { |
385 |
for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
386 |
; |
387 |
if (type == IF_COUNT) {
|
388 |
error_report("unsupported bus type '%s'", buf);
|
389 |
return NULL; |
390 |
} |
391 |
} else {
|
392 |
type = block_default_type; |
393 |
} |
394 |
|
395 |
max_devs = if_max_devs[type]; |
396 |
|
397 |
if (cyls || heads || secs) {
|
398 |
if (cyls < 1) { |
399 |
error_report("invalid physical cyls number");
|
400 |
return NULL; |
401 |
} |
402 |
if (heads < 1) { |
403 |
error_report("invalid physical heads number");
|
404 |
return NULL; |
405 |
} |
406 |
if (secs < 1) { |
407 |
error_report("invalid physical secs number");
|
408 |
return NULL; |
409 |
} |
410 |
} |
411 |
|
412 |
if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
413 |
if (!cyls) {
|
414 |
error_report("'%s' trans must be used with cyls, heads and secs",
|
415 |
buf); |
416 |
return NULL; |
417 |
} |
418 |
if (!strcmp(buf, "none")) |
419 |
translation = BIOS_ATA_TRANSLATION_NONE; |
420 |
else if (!strcmp(buf, "lba")) |
421 |
translation = BIOS_ATA_TRANSLATION_LBA; |
422 |
else if (!strcmp(buf, "auto")) |
423 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
424 |
else {
|
425 |
error_report("'%s' invalid translation type", buf);
|
426 |
return NULL; |
427 |
} |
428 |
} |
429 |
|
430 |
if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
431 |
if (!strcmp(buf, "disk")) { |
432 |
media = MEDIA_DISK; |
433 |
} else if (!strcmp(buf, "cdrom")) { |
434 |
if (cyls || secs || heads) {
|
435 |
error_report("CHS can't be set with media=%s", buf);
|
436 |
return NULL; |
437 |
} |
438 |
media = MEDIA_CDROM; |
439 |
} else {
|
440 |
error_report("'%s' invalid media", buf);
|
441 |
return NULL; |
442 |
} |
443 |
} |
444 |
|
445 |
if ((buf = qemu_opt_get(opts, "discard")) != NULL) { |
446 |
if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { |
447 |
error_report("invalid discard option");
|
448 |
return NULL; |
449 |
} |
450 |
} |
451 |
|
452 |
bdrv_flags |= BDRV_O_CACHE_WB; |
453 |
if ((buf = qemu_opt_get(opts, "cache")) != NULL) { |
454 |
if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { |
455 |
error_report("invalid cache option");
|
456 |
return NULL; |
457 |
} |
458 |
} |
459 |
|
460 |
#ifdef CONFIG_LINUX_AIO
|
461 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
462 |
if (!strcmp(buf, "native")) { |
463 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
464 |
} else if (!strcmp(buf, "threads")) { |
465 |
/* this is the default */
|
466 |
} else {
|
467 |
error_report("invalid aio option");
|
468 |
return NULL; |
469 |
} |
470 |
} |
471 |
#endif
|
472 |
|
473 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
474 |
if (is_help_option(buf)) {
|
475 |
error_printf("Supported formats:");
|
476 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
477 |
error_printf("\n");
|
478 |
return NULL; |
479 |
} |
480 |
drv = bdrv_find_whitelisted_format(buf, ro); |
481 |
if (!drv) {
|
482 |
error_report("'%s' invalid format", buf);
|
483 |
return NULL; |
484 |
} |
485 |
} |
486 |
|
487 |
/* disk I/O throttling */
|
488 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = |
489 |
qemu_opt_get_number(opts, "bps", 0); |
490 |
io_limits.bps[BLOCK_IO_LIMIT_READ] = |
491 |
qemu_opt_get_number(opts, "bps_rd", 0); |
492 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = |
493 |
qemu_opt_get_number(opts, "bps_wr", 0); |
494 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = |
495 |
qemu_opt_get_number(opts, "iops", 0); |
496 |
io_limits.iops[BLOCK_IO_LIMIT_READ] = |
497 |
qemu_opt_get_number(opts, "iops_rd", 0); |
498 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE] = |
499 |
qemu_opt_get_number(opts, "iops_wr", 0); |
500 |
|
501 |
if (!do_check_io_limits(&io_limits, &error)) {
|
502 |
error_report("%s", error_get_pretty(error));
|
503 |
error_free(error); |
504 |
return NULL; |
505 |
} |
506 |
|
507 |
if (qemu_opt_get(opts, "boot") != NULL) { |
508 |
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
509 |
"ignored. Future versions will reject this parameter. Please "
|
510 |
"update your scripts.\n");
|
511 |
} |
512 |
|
513 |
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
514 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
515 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
516 |
error_report("werror is not supported by this bus type");
|
517 |
return NULL; |
518 |
} |
519 |
|
520 |
on_write_error = parse_block_error_action(buf, 0);
|
521 |
if (on_write_error < 0) { |
522 |
return NULL; |
523 |
} |
524 |
} |
525 |
|
526 |
on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
527 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
528 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
529 |
error_report("rerror is not supported by this bus type");
|
530 |
return NULL; |
531 |
} |
532 |
|
533 |
on_read_error = parse_block_error_action(buf, 1);
|
534 |
if (on_read_error < 0) { |
535 |
return NULL; |
536 |
} |
537 |
} |
538 |
|
539 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
540 |
if (type != IF_VIRTIO) {
|
541 |
error_report("addr is not supported by this bus type");
|
542 |
return NULL; |
543 |
} |
544 |
} |
545 |
|
546 |
/* compute bus and unit according index */
|
547 |
|
548 |
if (index != -1) { |
549 |
if (bus_id != 0 || unit_id != -1) { |
550 |
error_report("index cannot be used with bus and unit");
|
551 |
return NULL; |
552 |
} |
553 |
bus_id = drive_index_to_bus_id(type, index); |
554 |
unit_id = drive_index_to_unit_id(type, index); |
555 |
} |
556 |
|
557 |
/* if user doesn't specify a unit_id,
|
558 |
* try to find the first free
|
559 |
*/
|
560 |
|
561 |
if (unit_id == -1) { |
562 |
unit_id = 0;
|
563 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
564 |
unit_id++; |
565 |
if (max_devs && unit_id >= max_devs) {
|
566 |
unit_id -= max_devs; |
567 |
bus_id++; |
568 |
} |
569 |
} |
570 |
} |
571 |
|
572 |
/* check unit id */
|
573 |
|
574 |
if (max_devs && unit_id >= max_devs) {
|
575 |
error_report("unit %d too big (max is %d)",
|
576 |
unit_id, max_devs - 1);
|
577 |
return NULL; |
578 |
} |
579 |
|
580 |
/*
|
581 |
* catch multiple definitions
|
582 |
*/
|
583 |
|
584 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
585 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
586 |
bus_id, unit_id, index); |
587 |
return NULL; |
588 |
} |
589 |
|
590 |
/* init */
|
591 |
|
592 |
dinfo = g_malloc0(sizeof(*dinfo));
|
593 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
594 |
dinfo->id = g_strdup(buf); |
595 |
} else {
|
596 |
/* no id supplied -> create one */
|
597 |
dinfo->id = g_malloc0(32);
|
598 |
if (type == IF_IDE || type == IF_SCSI)
|
599 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
600 |
if (max_devs)
|
601 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
602 |
if_name[type], bus_id, mediastr, unit_id); |
603 |
else
|
604 |
snprintf(dinfo->id, 32, "%s%s%i", |
605 |
if_name[type], mediastr, unit_id); |
606 |
} |
607 |
dinfo->bdrv = bdrv_new(dinfo->id); |
608 |
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
609 |
dinfo->bdrv->read_only = ro; |
610 |
dinfo->devaddr = devaddr; |
611 |
dinfo->type = type; |
612 |
dinfo->bus = bus_id; |
613 |
dinfo->unit = unit_id; |
614 |
dinfo->cyls = cyls; |
615 |
dinfo->heads = heads; |
616 |
dinfo->secs = secs; |
617 |
dinfo->trans = translation; |
618 |
dinfo->opts = all_opts; |
619 |
dinfo->refcount = 1;
|
620 |
if (serial != NULL) { |
621 |
dinfo->serial = g_strdup(serial); |
622 |
} |
623 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
624 |
|
625 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
626 |
|
627 |
/* disk I/O throttling */
|
628 |
bdrv_set_io_limits(dinfo->bdrv, &io_limits); |
629 |
|
630 |
switch(type) {
|
631 |
case IF_IDE:
|
632 |
case IF_SCSI:
|
633 |
case IF_XEN:
|
634 |
case IF_NONE:
|
635 |
dinfo->media_cd = media == MEDIA_CDROM; |
636 |
break;
|
637 |
case IF_SD:
|
638 |
case IF_FLOPPY:
|
639 |
case IF_PFLASH:
|
640 |
case IF_MTD:
|
641 |
break;
|
642 |
case IF_VIRTIO:
|
643 |
{ |
644 |
/* add virtio block device */
|
645 |
QemuOpts *devopts; |
646 |
devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
|
647 |
if (arch_type == QEMU_ARCH_S390X) {
|
648 |
qemu_opt_set(devopts, "driver", "virtio-blk-s390"); |
649 |
} else {
|
650 |
qemu_opt_set(devopts, "driver", "virtio-blk-pci"); |
651 |
} |
652 |
qemu_opt_set(devopts, "drive", dinfo->id);
|
653 |
if (devaddr)
|
654 |
qemu_opt_set(devopts, "addr", devaddr);
|
655 |
break;
|
656 |
} |
657 |
default:
|
658 |
abort(); |
659 |
} |
660 |
if (!file || !*file) {
|
661 |
if (qdict_size(bs_opts)) {
|
662 |
file = NULL;
|
663 |
} else {
|
664 |
return dinfo;
|
665 |
} |
666 |
} |
667 |
if (snapshot) {
|
668 |
/* always use cache=unsafe with snapshot */
|
669 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
670 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
671 |
} |
672 |
|
673 |
if (copy_on_read) {
|
674 |
bdrv_flags |= BDRV_O_COPY_ON_READ; |
675 |
} |
676 |
|
677 |
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
678 |
bdrv_flags |= BDRV_O_INCOMING; |
679 |
} |
680 |
|
681 |
if (media == MEDIA_CDROM) {
|
682 |
/* CDROM is fine for any interface, don't check. */
|
683 |
ro = 1;
|
684 |
} else if (ro == 1) { |
685 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
|
686 |
type != IF_NONE && type != IF_PFLASH) { |
687 |
error_report("readonly not supported by this bus type");
|
688 |
goto err;
|
689 |
} |
690 |
} |
691 |
|
692 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
693 |
|
694 |
if (ro && copy_on_read) {
|
695 |
error_report("warning: disabling copy_on_read on readonly drive");
|
696 |
} |
697 |
|
698 |
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv); |
699 |
bs_opts = NULL;
|
700 |
|
701 |
if (ret < 0) { |
702 |
if (ret == -EMEDIUMTYPE) {
|
703 |
error_report("could not open disk image %s: not in %s format",
|
704 |
file ?: dinfo->id, drv->format_name); |
705 |
} else {
|
706 |
error_report("could not open disk image %s: %s",
|
707 |
file ?: dinfo->id, strerror(-ret)); |
708 |
} |
709 |
goto err;
|
710 |
} |
711 |
|
712 |
if (bdrv_key_required(dinfo->bdrv))
|
713 |
autostart = 0;
|
714 |
|
715 |
qemu_opts_del(opts); |
716 |
|
717 |
return dinfo;
|
718 |
|
719 |
err:
|
720 |
qemu_opts_del(opts); |
721 |
QDECREF(bs_opts); |
722 |
bdrv_delete(dinfo->bdrv); |
723 |
g_free(dinfo->id); |
724 |
QTAILQ_REMOVE(&drives, dinfo, next); |
725 |
g_free(dinfo); |
726 |
return NULL; |
727 |
} |
728 |
|
729 |
void do_commit(Monitor *mon, const QDict *qdict) |
730 |
{ |
731 |
const char *device = qdict_get_str(qdict, "device"); |
732 |
BlockDriverState *bs; |
733 |
int ret;
|
734 |
|
735 |
if (!strcmp(device, "all")) { |
736 |
ret = bdrv_commit_all(); |
737 |
} else {
|
738 |
bs = bdrv_find(device); |
739 |
if (!bs) {
|
740 |
monitor_printf(mon, "Device '%s' not found\n", device);
|
741 |
return;
|
742 |
} |
743 |
ret = bdrv_commit(bs); |
744 |
} |
745 |
if (ret < 0) { |
746 |
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
|
747 |
strerror(-ret)); |
748 |
} |
749 |
} |
750 |
|
751 |
static void blockdev_do_action(int kind, void *data, Error **errp) |
752 |
{ |
753 |
TransactionAction action; |
754 |
TransactionActionList list; |
755 |
|
756 |
action.kind = kind; |
757 |
action.data = data; |
758 |
list.value = &action; |
759 |
list.next = NULL;
|
760 |
qmp_transaction(&list, errp); |
761 |
} |
762 |
|
763 |
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
764 |
bool has_format, const char *format, |
765 |
bool has_mode, enum NewImageMode mode, |
766 |
Error **errp) |
767 |
{ |
768 |
BlockdevSnapshot snapshot = { |
769 |
.device = (char *) device,
|
770 |
.snapshot_file = (char *) snapshot_file,
|
771 |
.has_format = has_format, |
772 |
.format = (char *) format,
|
773 |
.has_mode = has_mode, |
774 |
.mode = mode, |
775 |
}; |
776 |
blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
777 |
&snapshot, errp); |
778 |
} |
779 |
|
780 |
|
781 |
/* New and old BlockDriverState structs for group snapshots */
|
782 |
|
783 |
typedef struct BlkTransactionState BlkTransactionState; |
784 |
|
785 |
/* Only prepare() may fail. In a single transaction, only one of commit() or
|
786 |
abort() will be called, clean() will always be called if it present. */
|
787 |
typedef struct BdrvActionOps { |
788 |
/* Size of state struct, in bytes. */
|
789 |
size_t instance_size; |
790 |
/* Prepare the work, must NOT be NULL. */
|
791 |
void (*prepare)(BlkTransactionState *common, Error **errp);
|
792 |
/* Commit the changes, can be NULL. */
|
793 |
void (*commit)(BlkTransactionState *common);
|
794 |
/* Abort the changes on fail, can be NULL. */
|
795 |
void (*abort)(BlkTransactionState *common);
|
796 |
/* Clean up resource in the end, can be NULL. */
|
797 |
void (*clean)(BlkTransactionState *common);
|
798 |
} BdrvActionOps; |
799 |
|
800 |
/*
|
801 |
* This structure must be arranged as first member in child type, assuming
|
802 |
* that compiler will also arrange it to the same address with parent instance.
|
803 |
* Later it will be used in free().
|
804 |
*/
|
805 |
struct BlkTransactionState {
|
806 |
TransactionAction *action; |
807 |
const BdrvActionOps *ops;
|
808 |
QSIMPLEQ_ENTRY(BlkTransactionState) entry; |
809 |
}; |
810 |
|
811 |
/* external snapshot private data */
|
812 |
typedef struct ExternalSnapshotState { |
813 |
BlkTransactionState common; |
814 |
BlockDriverState *old_bs; |
815 |
BlockDriverState *new_bs; |
816 |
} ExternalSnapshotState; |
817 |
|
818 |
static void external_snapshot_prepare(BlkTransactionState *common, |
819 |
Error **errp) |
820 |
{ |
821 |
BlockDriver *drv; |
822 |
int flags, ret;
|
823 |
Error *local_err = NULL;
|
824 |
const char *device; |
825 |
const char *new_image_file; |
826 |
const char *format = "qcow2"; |
827 |
enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
|
828 |
ExternalSnapshotState *state = |
829 |
DO_UPCAST(ExternalSnapshotState, common, common); |
830 |
TransactionAction *action = common->action; |
831 |
|
832 |
/* get parameters */
|
833 |
g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); |
834 |
|
835 |
device = action->blockdev_snapshot_sync->device; |
836 |
new_image_file = action->blockdev_snapshot_sync->snapshot_file; |
837 |
if (action->blockdev_snapshot_sync->has_format) {
|
838 |
format = action->blockdev_snapshot_sync->format; |
839 |
} |
840 |
if (action->blockdev_snapshot_sync->has_mode) {
|
841 |
mode = action->blockdev_snapshot_sync->mode; |
842 |
} |
843 |
|
844 |
/* start processing */
|
845 |
drv = bdrv_find_format(format); |
846 |
if (!drv) {
|
847 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
848 |
return;
|
849 |
} |
850 |
|
851 |
state->old_bs = bdrv_find(device); |
852 |
if (!state->old_bs) {
|
853 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
854 |
return;
|
855 |
} |
856 |
|
857 |
if (!bdrv_is_inserted(state->old_bs)) {
|
858 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
859 |
return;
|
860 |
} |
861 |
|
862 |
if (bdrv_in_use(state->old_bs)) {
|
863 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
864 |
return;
|
865 |
} |
866 |
|
867 |
if (!bdrv_is_read_only(state->old_bs)) {
|
868 |
if (bdrv_flush(state->old_bs)) {
|
869 |
error_set(errp, QERR_IO_ERROR); |
870 |
return;
|
871 |
} |
872 |
} |
873 |
|
874 |
flags = state->old_bs->open_flags; |
875 |
|
876 |
/* create new image w/backing file */
|
877 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
878 |
bdrv_img_create(new_image_file, format, |
879 |
state->old_bs->filename, |
880 |
state->old_bs->drv->format_name, |
881 |
NULL, -1, flags, &local_err, false); |
882 |
if (error_is_set(&local_err)) {
|
883 |
error_propagate(errp, local_err); |
884 |
return;
|
885 |
} |
886 |
} |
887 |
|
888 |
/* We will manually add the backing_hd field to the bs later */
|
889 |
state->new_bs = bdrv_new("");
|
890 |
/* TODO Inherit bs->options or only take explicit options with an
|
891 |
* extended QMP command? */
|
892 |
ret = bdrv_open(state->new_bs, new_image_file, NULL,
|
893 |
flags | BDRV_O_NO_BACKING, drv); |
894 |
if (ret != 0) { |
895 |
error_setg_file_open(errp, -ret, new_image_file); |
896 |
} |
897 |
} |
898 |
|
899 |
static void external_snapshot_commit(BlkTransactionState *common) |
900 |
{ |
901 |
ExternalSnapshotState *state = |
902 |
DO_UPCAST(ExternalSnapshotState, common, common); |
903 |
|
904 |
/* This removes our old bs and adds the new bs */
|
905 |
bdrv_append(state->new_bs, state->old_bs); |
906 |
/* We don't need (or want) to use the transactional
|
907 |
* bdrv_reopen_multiple() across all the entries at once, because we
|
908 |
* don't want to abort all of them if one of them fails the reopen */
|
909 |
bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, |
910 |
NULL);
|
911 |
} |
912 |
|
913 |
static void external_snapshot_abort(BlkTransactionState *common) |
914 |
{ |
915 |
ExternalSnapshotState *state = |
916 |
DO_UPCAST(ExternalSnapshotState, common, common); |
917 |
if (state->new_bs) {
|
918 |
bdrv_delete(state->new_bs); |
919 |
} |
920 |
} |
921 |
|
922 |
typedef struct DriveBackupState { |
923 |
BlkTransactionState common; |
924 |
BlockDriverState *bs; |
925 |
BlockJob *job; |
926 |
} DriveBackupState; |
927 |
|
928 |
static void drive_backup_prepare(BlkTransactionState *common, Error **errp) |
929 |
{ |
930 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
931 |
DriveBackup *backup; |
932 |
Error *local_err = NULL;
|
933 |
|
934 |
assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
935 |
backup = common->action->drive_backup; |
936 |
|
937 |
qmp_drive_backup(backup->device, backup->target, |
938 |
backup->has_format, backup->format, |
939 |
backup->has_mode, backup->mode, |
940 |
backup->has_speed, backup->speed, |
941 |
backup->has_on_source_error, backup->on_source_error, |
942 |
backup->has_on_target_error, backup->on_target_error, |
943 |
&local_err); |
944 |
if (error_is_set(&local_err)) {
|
945 |
error_propagate(errp, local_err); |
946 |
state->bs = NULL;
|
947 |
state->job = NULL;
|
948 |
return;
|
949 |
} |
950 |
|
951 |
state->bs = bdrv_find(backup->device); |
952 |
state->job = state->bs->job; |
953 |
} |
954 |
|
955 |
static void drive_backup_abort(BlkTransactionState *common) |
956 |
{ |
957 |
DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); |
958 |
BlockDriverState *bs = state->bs; |
959 |
|
960 |
/* Only cancel if it's the job we started */
|
961 |
if (bs && bs->job && bs->job == state->job) {
|
962 |
block_job_cancel_sync(bs->job); |
963 |
} |
964 |
} |
965 |
|
966 |
static const BdrvActionOps actions[] = { |
967 |
[TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
968 |
.instance_size = sizeof(ExternalSnapshotState),
|
969 |
.prepare = external_snapshot_prepare, |
970 |
.commit = external_snapshot_commit, |
971 |
.abort = external_snapshot_abort, |
972 |
}, |
973 |
[TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
974 |
.instance_size = sizeof(DriveBackupState),
|
975 |
.prepare = drive_backup_prepare, |
976 |
.abort = drive_backup_abort, |
977 |
}, |
978 |
}; |
979 |
|
980 |
/*
|
981 |
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
982 |
* then we do not pivot any of the devices in the group, and abandon the
|
983 |
* snapshots
|
984 |
*/
|
985 |
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
|
986 |
{ |
987 |
TransactionActionList *dev_entry = dev_list; |
988 |
BlkTransactionState *state, *next; |
989 |
Error *local_err = NULL;
|
990 |
|
991 |
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; |
992 |
QSIMPLEQ_INIT(&snap_bdrv_states); |
993 |
|
994 |
/* drain all i/o before any snapshots */
|
995 |
bdrv_drain_all(); |
996 |
|
997 |
/* We don't do anything in this loop that commits us to the snapshot */
|
998 |
while (NULL != dev_entry) { |
999 |
TransactionAction *dev_info = NULL;
|
1000 |
const BdrvActionOps *ops;
|
1001 |
|
1002 |
dev_info = dev_entry->value; |
1003 |
dev_entry = dev_entry->next; |
1004 |
|
1005 |
assert(dev_info->kind < ARRAY_SIZE(actions)); |
1006 |
|
1007 |
ops = &actions[dev_info->kind]; |
1008 |
state = g_malloc0(ops->instance_size); |
1009 |
state->ops = ops; |
1010 |
state->action = dev_info; |
1011 |
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
1012 |
|
1013 |
state->ops->prepare(state, &local_err); |
1014 |
if (error_is_set(&local_err)) {
|
1015 |
error_propagate(errp, local_err); |
1016 |
goto delete_and_fail;
|
1017 |
} |
1018 |
} |
1019 |
|
1020 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1021 |
if (state->ops->commit) {
|
1022 |
state->ops->commit(state); |
1023 |
} |
1024 |
} |
1025 |
|
1026 |
/* success */
|
1027 |
goto exit;
|
1028 |
|
1029 |
delete_and_fail:
|
1030 |
/*
|
1031 |
* failure, and it is all-or-none; abandon each new bs, and keep using
|
1032 |
* the original bs for all images
|
1033 |
*/
|
1034 |
QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1035 |
if (state->ops->abort) {
|
1036 |
state->ops->abort(state); |
1037 |
} |
1038 |
} |
1039 |
exit:
|
1040 |
QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
1041 |
if (state->ops->clean) {
|
1042 |
state->ops->clean(state); |
1043 |
} |
1044 |
g_free(state); |
1045 |
} |
1046 |
} |
1047 |
|
1048 |
|
1049 |
static void eject_device(BlockDriverState *bs, int force, Error **errp) |
1050 |
{ |
1051 |
if (bdrv_in_use(bs)) {
|
1052 |
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
1053 |
return;
|
1054 |
} |
1055 |
if (!bdrv_dev_has_removable_media(bs)) {
|
1056 |
error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
1057 |
return;
|
1058 |
} |
1059 |
|
1060 |
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
1061 |
bdrv_dev_eject_request(bs, force); |
1062 |
if (!force) {
|
1063 |
error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
1064 |
return;
|
1065 |
} |
1066 |
} |
1067 |
|
1068 |
bdrv_close(bs); |
1069 |
} |
1070 |
|
1071 |
void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
1072 |
{ |
1073 |
BlockDriverState *bs; |
1074 |
|
1075 |
bs = bdrv_find(device); |
1076 |
if (!bs) {
|
1077 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1078 |
return;
|
1079 |
} |
1080 |
|
1081 |
eject_device(bs, force, errp); |
1082 |
} |
1083 |
|
1084 |
void qmp_block_passwd(const char *device, const char *password, Error **errp) |
1085 |
{ |
1086 |
BlockDriverState *bs; |
1087 |
int err;
|
1088 |
|
1089 |
bs = bdrv_find(device); |
1090 |
if (!bs) {
|
1091 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1092 |
return;
|
1093 |
} |
1094 |
|
1095 |
err = bdrv_set_key(bs, password); |
1096 |
if (err == -EINVAL) {
|
1097 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1098 |
return;
|
1099 |
} else if (err < 0) { |
1100 |
error_set(errp, QERR_INVALID_PASSWORD); |
1101 |
return;
|
1102 |
} |
1103 |
} |
1104 |
|
1105 |
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
1106 |
int bdrv_flags, BlockDriver *drv,
|
1107 |
const char *password, Error **errp) |
1108 |
{ |
1109 |
int ret;
|
1110 |
|
1111 |
ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv);
|
1112 |
if (ret < 0) { |
1113 |
error_setg_file_open(errp, -ret, filename); |
1114 |
return;
|
1115 |
} |
1116 |
|
1117 |
if (bdrv_key_required(bs)) {
|
1118 |
if (password) {
|
1119 |
if (bdrv_set_key(bs, password) < 0) { |
1120 |
error_set(errp, QERR_INVALID_PASSWORD); |
1121 |
} |
1122 |
} else {
|
1123 |
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), |
1124 |
bdrv_get_encrypted_filename(bs)); |
1125 |
} |
1126 |
} else if (password) { |
1127 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1128 |
} |
1129 |
} |
1130 |
|
1131 |
void qmp_change_blockdev(const char *device, const char *filename, |
1132 |
bool has_format, const char *format, Error **errp) |
1133 |
{ |
1134 |
BlockDriverState *bs; |
1135 |
BlockDriver *drv = NULL;
|
1136 |
int bdrv_flags;
|
1137 |
Error *err = NULL;
|
1138 |
|
1139 |
bs = bdrv_find(device); |
1140 |
if (!bs) {
|
1141 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1142 |
return;
|
1143 |
} |
1144 |
|
1145 |
if (format) {
|
1146 |
drv = bdrv_find_whitelisted_format(format, bs->read_only); |
1147 |
if (!drv) {
|
1148 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1149 |
return;
|
1150 |
} |
1151 |
} |
1152 |
|
1153 |
eject_device(bs, 0, &err);
|
1154 |
if (error_is_set(&err)) {
|
1155 |
error_propagate(errp, err); |
1156 |
return;
|
1157 |
} |
1158 |
|
1159 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
1160 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
1161 |
|
1162 |
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
1163 |
} |
1164 |
|
1165 |
/* throttling disk I/O limits */
|
1166 |
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
1167 |
int64_t bps_wr, int64_t iops, int64_t iops_rd, |
1168 |
int64_t iops_wr, Error **errp) |
1169 |
{ |
1170 |
BlockIOLimit io_limits; |
1171 |
BlockDriverState *bs; |
1172 |
|
1173 |
bs = bdrv_find(device); |
1174 |
if (!bs) {
|
1175 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1176 |
return;
|
1177 |
} |
1178 |
|
1179 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; |
1180 |
io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; |
1181 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; |
1182 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; |
1183 |
io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; |
1184 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; |
1185 |
|
1186 |
if (!do_check_io_limits(&io_limits, errp)) {
|
1187 |
return;
|
1188 |
} |
1189 |
|
1190 |
bs->io_limits = io_limits; |
1191 |
|
1192 |
if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
|
1193 |
bdrv_io_limits_enable(bs); |
1194 |
} else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { |
1195 |
bdrv_io_limits_disable(bs); |
1196 |
} else {
|
1197 |
if (bs->block_timer) {
|
1198 |
qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); |
1199 |
} |
1200 |
} |
1201 |
} |
1202 |
|
1203 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
1204 |
{ |
1205 |
const char *id = qdict_get_str(qdict, "id"); |
1206 |
BlockDriverState *bs; |
1207 |
|
1208 |
bs = bdrv_find(id); |
1209 |
if (!bs) {
|
1210 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
1211 |
return -1; |
1212 |
} |
1213 |
if (bdrv_in_use(bs)) {
|
1214 |
qerror_report(QERR_DEVICE_IN_USE, id); |
1215 |
return -1; |
1216 |
} |
1217 |
|
1218 |
/* quiesce block driver; prevent further io */
|
1219 |
bdrv_drain_all(); |
1220 |
bdrv_flush(bs); |
1221 |
bdrv_close(bs); |
1222 |
|
1223 |
/* if we have a device attached to this BlockDriverState
|
1224 |
* then we need to make the drive anonymous until the device
|
1225 |
* can be removed. If this is a drive with no device backing
|
1226 |
* then we can just get rid of the block driver state right here.
|
1227 |
*/
|
1228 |
if (bdrv_get_attached_dev(bs)) {
|
1229 |
bdrv_make_anon(bs); |
1230 |
|
1231 |
/* Further I/O must not pause the guest */
|
1232 |
bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, |
1233 |
BLOCKDEV_ON_ERROR_REPORT); |
1234 |
} else {
|
1235 |
drive_uninit(drive_get_by_blockdev(bs)); |
1236 |
} |
1237 |
|
1238 |
return 0; |
1239 |
} |
1240 |
|
1241 |
void qmp_block_resize(const char *device, int64_t size, Error **errp) |
1242 |
{ |
1243 |
BlockDriverState *bs; |
1244 |
int ret;
|
1245 |
|
1246 |
bs = bdrv_find(device); |
1247 |
if (!bs) {
|
1248 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1249 |
return;
|
1250 |
} |
1251 |
|
1252 |
if (size < 0) { |
1253 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
1254 |
return;
|
1255 |
} |
1256 |
|
1257 |
/* complete all in-flight operations before resizing the device */
|
1258 |
bdrv_drain_all(); |
1259 |
|
1260 |
ret = bdrv_truncate(bs, size); |
1261 |
switch (ret) {
|
1262 |
case 0: |
1263 |
break;
|
1264 |
case -ENOMEDIUM:
|
1265 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1266 |
break;
|
1267 |
case -ENOTSUP:
|
1268 |
error_set(errp, QERR_UNSUPPORTED); |
1269 |
break;
|
1270 |
case -EACCES:
|
1271 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
1272 |
break;
|
1273 |
case -EBUSY:
|
1274 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1275 |
break;
|
1276 |
default:
|
1277 |
error_setg_errno(errp, -ret, "Could not resize");
|
1278 |
break;
|
1279 |
} |
1280 |
} |
1281 |
|
1282 |
static void block_job_cb(void *opaque, int ret) |
1283 |
{ |
1284 |
BlockDriverState *bs = opaque; |
1285 |
QObject *obj; |
1286 |
|
1287 |
trace_block_job_cb(bs, bs->job, ret); |
1288 |
|
1289 |
assert(bs->job); |
1290 |
obj = qobject_from_block_job(bs->job); |
1291 |
if (ret < 0) { |
1292 |
QDict *dict = qobject_to_qdict(obj); |
1293 |
qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
|
1294 |
} |
1295 |
|
1296 |
if (block_job_is_cancelled(bs->job)) {
|
1297 |
monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); |
1298 |
} else {
|
1299 |
monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); |
1300 |
} |
1301 |
qobject_decref(obj); |
1302 |
|
1303 |
drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); |
1304 |
} |
1305 |
|
1306 |
void qmp_block_stream(const char *device, bool has_base, |
1307 |
const char *base, bool has_speed, int64_t speed, |
1308 |
bool has_on_error, BlockdevOnError on_error,
|
1309 |
Error **errp) |
1310 |
{ |
1311 |
BlockDriverState *bs; |
1312 |
BlockDriverState *base_bs = NULL;
|
1313 |
Error *local_err = NULL;
|
1314 |
|
1315 |
if (!has_on_error) {
|
1316 |
on_error = BLOCKDEV_ON_ERROR_REPORT; |
1317 |
} |
1318 |
|
1319 |
bs = bdrv_find(device); |
1320 |
if (!bs) {
|
1321 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1322 |
return;
|
1323 |
} |
1324 |
|
1325 |
if (base) {
|
1326 |
base_bs = bdrv_find_backing_image(bs, base); |
1327 |
if (base_bs == NULL) { |
1328 |
error_set(errp, QERR_BASE_NOT_FOUND, base); |
1329 |
return;
|
1330 |
} |
1331 |
} |
1332 |
|
1333 |
stream_start(bs, base_bs, base, has_speed ? speed : 0,
|
1334 |
on_error, block_job_cb, bs, &local_err); |
1335 |
if (error_is_set(&local_err)) {
|
1336 |
error_propagate(errp, local_err); |
1337 |
return;
|
1338 |
} |
1339 |
|
1340 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1341 |
* underneath us.
|
1342 |
*/
|
1343 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1344 |
|
1345 |
trace_qmp_block_stream(bs, bs->job); |
1346 |
} |
1347 |
|
1348 |
void qmp_block_commit(const char *device, |
1349 |
bool has_base, const char *base, const char *top, |
1350 |
bool has_speed, int64_t speed,
|
1351 |
Error **errp) |
1352 |
{ |
1353 |
BlockDriverState *bs; |
1354 |
BlockDriverState *base_bs, *top_bs; |
1355 |
Error *local_err = NULL;
|
1356 |
/* This will be part of the QMP command, if/when the
|
1357 |
* BlockdevOnError change for blkmirror makes it in
|
1358 |
*/
|
1359 |
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
1360 |
|
1361 |
/* drain all i/o before commits */
|
1362 |
bdrv_drain_all(); |
1363 |
|
1364 |
bs = bdrv_find(device); |
1365 |
if (!bs) {
|
1366 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1367 |
return;
|
1368 |
} |
1369 |
|
1370 |
/* default top_bs is the active layer */
|
1371 |
top_bs = bs; |
1372 |
|
1373 |
if (top) {
|
1374 |
if (strcmp(bs->filename, top) != 0) { |
1375 |
top_bs = bdrv_find_backing_image(bs, top); |
1376 |
} |
1377 |
} |
1378 |
|
1379 |
if (top_bs == NULL) { |
1380 |
error_setg(errp, "Top image file %s not found", top ? top : "NULL"); |
1381 |
return;
|
1382 |
} |
1383 |
|
1384 |
if (has_base && base) {
|
1385 |
base_bs = bdrv_find_backing_image(top_bs, base); |
1386 |
} else {
|
1387 |
base_bs = bdrv_find_base(top_bs); |
1388 |
} |
1389 |
|
1390 |
if (base_bs == NULL) { |
1391 |
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
1392 |
return;
|
1393 |
} |
1394 |
|
1395 |
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, |
1396 |
&local_err); |
1397 |
if (local_err != NULL) { |
1398 |
error_propagate(errp, local_err); |
1399 |
return;
|
1400 |
} |
1401 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1402 |
* underneath us.
|
1403 |
*/
|
1404 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1405 |
} |
1406 |
|
1407 |
void qmp_drive_backup(const char *device, const char *target, |
1408 |
bool has_format, const char *format, |
1409 |
bool has_mode, enum NewImageMode mode, |
1410 |
bool has_speed, int64_t speed,
|
1411 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1412 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1413 |
Error **errp) |
1414 |
{ |
1415 |
BlockDriverState *bs; |
1416 |
BlockDriverState *target_bs; |
1417 |
BlockDriver *drv = NULL;
|
1418 |
Error *local_err = NULL;
|
1419 |
int flags;
|
1420 |
int64_t size; |
1421 |
int ret;
|
1422 |
|
1423 |
if (!has_speed) {
|
1424 |
speed = 0;
|
1425 |
} |
1426 |
if (!has_on_source_error) {
|
1427 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1428 |
} |
1429 |
if (!has_on_target_error) {
|
1430 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1431 |
} |
1432 |
if (!has_mode) {
|
1433 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1434 |
} |
1435 |
|
1436 |
bs = bdrv_find(device); |
1437 |
if (!bs) {
|
1438 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1439 |
return;
|
1440 |
} |
1441 |
|
1442 |
if (!bdrv_is_inserted(bs)) {
|
1443 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1444 |
return;
|
1445 |
} |
1446 |
|
1447 |
if (!has_format) {
|
1448 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1449 |
} |
1450 |
if (format) {
|
1451 |
drv = bdrv_find_format(format); |
1452 |
if (!drv) {
|
1453 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1454 |
return;
|
1455 |
} |
1456 |
} |
1457 |
|
1458 |
if (bdrv_in_use(bs)) {
|
1459 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1460 |
return;
|
1461 |
} |
1462 |
|
1463 |
flags = bs->open_flags | BDRV_O_RDWR; |
1464 |
|
1465 |
size = bdrv_getlength(bs); |
1466 |
if (size < 0) { |
1467 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
1468 |
return;
|
1469 |
} |
1470 |
|
1471 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
1472 |
assert(format && drv); |
1473 |
bdrv_img_create(target, format, |
1474 |
NULL, NULL, NULL, size, flags, &local_err, false); |
1475 |
} |
1476 |
|
1477 |
if (error_is_set(&local_err)) {
|
1478 |
error_propagate(errp, local_err); |
1479 |
return;
|
1480 |
} |
1481 |
|
1482 |
target_bs = bdrv_new("");
|
1483 |
ret = bdrv_open(target_bs, target, NULL, flags, drv);
|
1484 |
if (ret < 0) { |
1485 |
bdrv_delete(target_bs); |
1486 |
error_setg_file_open(errp, -ret, target); |
1487 |
return;
|
1488 |
} |
1489 |
|
1490 |
backup_start(bs, target_bs, speed, on_source_error, on_target_error, |
1491 |
block_job_cb, bs, &local_err); |
1492 |
if (local_err != NULL) { |
1493 |
bdrv_delete(target_bs); |
1494 |
error_propagate(errp, local_err); |
1495 |
return;
|
1496 |
} |
1497 |
|
1498 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1499 |
* underneath us.
|
1500 |
*/
|
1501 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1502 |
} |
1503 |
|
1504 |
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20) |
1505 |
|
1506 |
void qmp_drive_mirror(const char *device, const char *target, |
1507 |
bool has_format, const char *format, |
1508 |
enum MirrorSyncMode sync,
|
1509 |
bool has_mode, enum NewImageMode mode, |
1510 |
bool has_speed, int64_t speed,
|
1511 |
bool has_granularity, uint32_t granularity,
|
1512 |
bool has_buf_size, int64_t buf_size,
|
1513 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1514 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1515 |
Error **errp) |
1516 |
{ |
1517 |
BlockDriverState *bs; |
1518 |
BlockDriverState *source, *target_bs; |
1519 |
BlockDriver *drv = NULL;
|
1520 |
Error *local_err = NULL;
|
1521 |
int flags;
|
1522 |
int64_t size; |
1523 |
int ret;
|
1524 |
|
1525 |
if (!has_speed) {
|
1526 |
speed = 0;
|
1527 |
} |
1528 |
if (!has_on_source_error) {
|
1529 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1530 |
} |
1531 |
if (!has_on_target_error) {
|
1532 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1533 |
} |
1534 |
if (!has_mode) {
|
1535 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1536 |
} |
1537 |
if (!has_granularity) {
|
1538 |
granularity = 0;
|
1539 |
} |
1540 |
if (!has_buf_size) {
|
1541 |
buf_size = DEFAULT_MIRROR_BUF_SIZE; |
1542 |
} |
1543 |
|
1544 |
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
1545 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1546 |
return;
|
1547 |
} |
1548 |
if (granularity & (granularity - 1)) { |
1549 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1550 |
return;
|
1551 |
} |
1552 |
|
1553 |
bs = bdrv_find(device); |
1554 |
if (!bs) {
|
1555 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1556 |
return;
|
1557 |
} |
1558 |
|
1559 |
if (!bdrv_is_inserted(bs)) {
|
1560 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1561 |
return;
|
1562 |
} |
1563 |
|
1564 |
if (!has_format) {
|
1565 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1566 |
} |
1567 |
if (format) {
|
1568 |
drv = bdrv_find_format(format); |
1569 |
if (!drv) {
|
1570 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1571 |
return;
|
1572 |
} |
1573 |
} |
1574 |
|
1575 |
if (bdrv_in_use(bs)) {
|
1576 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1577 |
return;
|
1578 |
} |
1579 |
|
1580 |
flags = bs->open_flags | BDRV_O_RDWR; |
1581 |
source = bs->backing_hd; |
1582 |
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
1583 |
sync = MIRROR_SYNC_MODE_FULL; |
1584 |
} |
1585 |
|
1586 |
size = bdrv_getlength(bs); |
1587 |
if (size < 0) { |
1588 |
error_setg_errno(errp, -size, "bdrv_getlength failed");
|
1589 |
return;
|
1590 |
} |
1591 |
|
1592 |
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
|
1593 |
/* create new image w/o backing file */
|
1594 |
assert(format && drv); |
1595 |
bdrv_img_create(target, format, |
1596 |
NULL, NULL, NULL, size, flags, &local_err, false); |
1597 |
} else {
|
1598 |
switch (mode) {
|
1599 |
case NEW_IMAGE_MODE_EXISTING:
|
1600 |
ret = 0;
|
1601 |
break;
|
1602 |
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
1603 |
/* create new image with backing file */
|
1604 |
bdrv_img_create(target, format, |
1605 |
source->filename, |
1606 |
source->drv->format_name, |
1607 |
NULL, size, flags, &local_err, false); |
1608 |
break;
|
1609 |
default:
|
1610 |
abort(); |
1611 |
} |
1612 |
} |
1613 |
|
1614 |
if (error_is_set(&local_err)) {
|
1615 |
error_propagate(errp, local_err); |
1616 |
return;
|
1617 |
} |
1618 |
|
1619 |
/* Mirroring takes care of copy-on-write using the source's backing
|
1620 |
* file.
|
1621 |
*/
|
1622 |
target_bs = bdrv_new("");
|
1623 |
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
|
1624 |
if (ret < 0) { |
1625 |
bdrv_delete(target_bs); |
1626 |
error_setg_file_open(errp, -ret, target); |
1627 |
return;
|
1628 |
} |
1629 |
|
1630 |
mirror_start(bs, target_bs, speed, granularity, buf_size, sync, |
1631 |
on_source_error, on_target_error, |
1632 |
block_job_cb, bs, &local_err); |
1633 |
if (local_err != NULL) { |
1634 |
bdrv_delete(target_bs); |
1635 |
error_propagate(errp, local_err); |
1636 |
return;
|
1637 |
} |
1638 |
|
1639 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1640 |
* underneath us.
|
1641 |
*/
|
1642 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1643 |
} |
1644 |
|
1645 |
static BlockJob *find_block_job(const char *device) |
1646 |
{ |
1647 |
BlockDriverState *bs; |
1648 |
|
1649 |
bs = bdrv_find(device); |
1650 |
if (!bs || !bs->job) {
|
1651 |
return NULL; |
1652 |
} |
1653 |
return bs->job;
|
1654 |
} |
1655 |
|
1656 |
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
1657 |
{ |
1658 |
BlockJob *job = find_block_job(device); |
1659 |
|
1660 |
if (!job) {
|
1661 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1662 |
return;
|
1663 |
} |
1664 |
|
1665 |
block_job_set_speed(job, speed, errp); |
1666 |
} |
1667 |
|
1668 |
void qmp_block_job_cancel(const char *device, |
1669 |
bool has_force, bool force, Error **errp) |
1670 |
{ |
1671 |
BlockJob *job = find_block_job(device); |
1672 |
|
1673 |
if (!has_force) {
|
1674 |
force = false;
|
1675 |
} |
1676 |
|
1677 |
if (!job) {
|
1678 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1679 |
return;
|
1680 |
} |
1681 |
if (job->paused && !force) {
|
1682 |
error_set(errp, QERR_BLOCK_JOB_PAUSED, device); |
1683 |
return;
|
1684 |
} |
1685 |
|
1686 |
trace_qmp_block_job_cancel(job); |
1687 |
block_job_cancel(job); |
1688 |
} |
1689 |
|
1690 |
void qmp_block_job_pause(const char *device, Error **errp) |
1691 |
{ |
1692 |
BlockJob *job = find_block_job(device); |
1693 |
|
1694 |
if (!job) {
|
1695 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1696 |
return;
|
1697 |
} |
1698 |
|
1699 |
trace_qmp_block_job_pause(job); |
1700 |
block_job_pause(job); |
1701 |
} |
1702 |
|
1703 |
void qmp_block_job_resume(const char *device, Error **errp) |
1704 |
{ |
1705 |
BlockJob *job = find_block_job(device); |
1706 |
|
1707 |
if (!job) {
|
1708 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1709 |
return;
|
1710 |
} |
1711 |
|
1712 |
trace_qmp_block_job_resume(job); |
1713 |
block_job_resume(job); |
1714 |
} |
1715 |
|
1716 |
void qmp_block_job_complete(const char *device, Error **errp) |
1717 |
{ |
1718 |
BlockJob *job = find_block_job(device); |
1719 |
|
1720 |
if (!job) {
|
1721 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1722 |
return;
|
1723 |
} |
1724 |
|
1725 |
trace_qmp_block_job_complete(job); |
1726 |
block_job_complete(job, errp); |
1727 |
} |
1728 |
|
1729 |
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
1730 |
{ |
1731 |
BlockJobInfoList **prev = opaque; |
1732 |
BlockJob *job = bs->job; |
1733 |
|
1734 |
if (job) {
|
1735 |
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
1736 |
elem->value = block_job_query(bs->job); |
1737 |
(*prev)->next = elem; |
1738 |
*prev = elem; |
1739 |
} |
1740 |
} |
1741 |
|
1742 |
BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
1743 |
{ |
1744 |
/* Dummy is a fake list element for holding the head pointer */
|
1745 |
BlockJobInfoList dummy = {}; |
1746 |
BlockJobInfoList *prev = &dummy; |
1747 |
bdrv_iterate(do_qmp_query_block_jobs_one, &prev); |
1748 |
return dummy.next;
|
1749 |
} |
1750 |
|
1751 |
QemuOptsList qemu_common_drive_opts = { |
1752 |
.name = "drive",
|
1753 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
1754 |
.desc = { |
1755 |
{ |
1756 |
.name = "bus",
|
1757 |
.type = QEMU_OPT_NUMBER, |
1758 |
.help = "bus number",
|
1759 |
},{ |
1760 |
.name = "unit",
|
1761 |
.type = QEMU_OPT_NUMBER, |
1762 |
.help = "unit number (i.e. lun for scsi)",
|
1763 |
},{ |
1764 |
.name = "if",
|
1765 |
.type = QEMU_OPT_STRING, |
1766 |
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
1767 |
},{ |
1768 |
.name = "index",
|
1769 |
.type = QEMU_OPT_NUMBER, |
1770 |
.help = "index number",
|
1771 |
},{ |
1772 |
.name = "cyls",
|
1773 |
.type = QEMU_OPT_NUMBER, |
1774 |
.help = "number of cylinders (ide disk geometry)",
|
1775 |
},{ |
1776 |
.name = "heads",
|
1777 |
.type = QEMU_OPT_NUMBER, |
1778 |
.help = "number of heads (ide disk geometry)",
|
1779 |
},{ |
1780 |
.name = "secs",
|
1781 |
.type = QEMU_OPT_NUMBER, |
1782 |
.help = "number of sectors (ide disk geometry)",
|
1783 |
},{ |
1784 |
.name = "trans",
|
1785 |
.type = QEMU_OPT_STRING, |
1786 |
.help = "chs translation (auto, lba. none)",
|
1787 |
},{ |
1788 |
.name = "media",
|
1789 |
.type = QEMU_OPT_STRING, |
1790 |
.help = "media type (disk, cdrom)",
|
1791 |
},{ |
1792 |
.name = "snapshot",
|
1793 |
.type = QEMU_OPT_BOOL, |
1794 |
.help = "enable/disable snapshot mode",
|
1795 |
},{ |
1796 |
.name = "file",
|
1797 |
.type = QEMU_OPT_STRING, |
1798 |
.help = "disk image",
|
1799 |
},{ |
1800 |
.name = "discard",
|
1801 |
.type = QEMU_OPT_STRING, |
1802 |
.help = "discard operation (ignore/off, unmap/on)",
|
1803 |
},{ |
1804 |
.name = "cache",
|
1805 |
.type = QEMU_OPT_STRING, |
1806 |
.help = "host cache usage (none, writeback, writethrough, "
|
1807 |
"directsync, unsafe)",
|
1808 |
},{ |
1809 |
.name = "aio",
|
1810 |
.type = QEMU_OPT_STRING, |
1811 |
.help = "host AIO implementation (threads, native)",
|
1812 |
},{ |
1813 |
.name = "format",
|
1814 |
.type = QEMU_OPT_STRING, |
1815 |
.help = "disk format (raw, qcow2, ...)",
|
1816 |
},{ |
1817 |
.name = "serial",
|
1818 |
.type = QEMU_OPT_STRING, |
1819 |
.help = "disk serial number",
|
1820 |
},{ |
1821 |
.name = "rerror",
|
1822 |
.type = QEMU_OPT_STRING, |
1823 |
.help = "read error action",
|
1824 |
},{ |
1825 |
.name = "werror",
|
1826 |
.type = QEMU_OPT_STRING, |
1827 |
.help = "write error action",
|
1828 |
},{ |
1829 |
.name = "addr",
|
1830 |
.type = QEMU_OPT_STRING, |
1831 |
.help = "pci address (virtio only)",
|
1832 |
},{ |
1833 |
.name = "readonly",
|
1834 |
.type = QEMU_OPT_BOOL, |
1835 |
.help = "open drive file as read-only",
|
1836 |
},{ |
1837 |
.name = "iops",
|
1838 |
.type = QEMU_OPT_NUMBER, |
1839 |
.help = "limit total I/O operations per second",
|
1840 |
},{ |
1841 |
.name = "iops_rd",
|
1842 |
.type = QEMU_OPT_NUMBER, |
1843 |
.help = "limit read operations per second",
|
1844 |
},{ |
1845 |
.name = "iops_wr",
|
1846 |
.type = QEMU_OPT_NUMBER, |
1847 |
.help = "limit write operations per second",
|
1848 |
},{ |
1849 |
.name = "bps",
|
1850 |
.type = QEMU_OPT_NUMBER, |
1851 |
.help = "limit total bytes per second",
|
1852 |
},{ |
1853 |
.name = "bps_rd",
|
1854 |
.type = QEMU_OPT_NUMBER, |
1855 |
.help = "limit read bytes per second",
|
1856 |
},{ |
1857 |
.name = "bps_wr",
|
1858 |
.type = QEMU_OPT_NUMBER, |
1859 |
.help = "limit write bytes per second",
|
1860 |
},{ |
1861 |
.name = "copy-on-read",
|
1862 |
.type = QEMU_OPT_BOOL, |
1863 |
.help = "copy read data from backing file into image file",
|
1864 |
},{ |
1865 |
.name = "boot",
|
1866 |
.type = QEMU_OPT_BOOL, |
1867 |
.help = "(deprecated, ignored)",
|
1868 |
}, |
1869 |
{ /* end of list */ }
|
1870 |
}, |
1871 |
}; |
1872 |
|
1873 |
QemuOptsList qemu_drive_opts = { |
1874 |
.name = "drive",
|
1875 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), |
1876 |
.desc = { |
1877 |
/*
|
1878 |
* no elements => accept any params
|
1879 |
* validation will happen later
|
1880 |
*/
|
1881 |
{ /* end of list */ }
|
1882 |
}, |
1883 |
}; |