blockdev.c 59.0 KB
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/*
 * QEMU host block devices
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * This work is licensed under the terms of the GNU GPL, version 2 or
 * later.  See the COPYING file in the top-level directory.
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 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *
 * Copyright (c) 2003-2008 Fabrice Bellard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * 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"
#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] = {
    [IF_NONE] = "none",
    [IF_IDE] = "ide",
    [IF_SCSI] = "scsi",
    [IF_FLOPPY] = "floppy",
    [IF_PFLASH] = "pflash",
    [IF_MTD] = "mtd",
    [IF_SD] = "sd",
    [IF_VIRTIO] = "virtio",
    [IF_XEN] = "xen",
};

static const int if_max_devs[IF_COUNT] = {
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    /*
     * Do not change these numbers!  They govern how drive option
     * index maps to unit and bus.  That mapping is ABI.
     *
     * All controllers used to imlement if=T drives need to support
     * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
     * Otherwise, some index values map to "impossible" bus, unit
     * values.
     *
     * For instance, if you change [IF_SCSI] to 255, -drive
     * if=scsi,index=12 no longer means bus=1,unit=5, but
     * bus=0,unit=12.  With an lsi53c895a controller (7 units max),
     * the drive can't be set up.  Regression.
     */
    [IF_IDE] = 2,
    [IF_SCSI] = 7,
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};

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/*
 * We automatically delete the drive when a device using it gets
 * unplugged.  Questionable feature, but we can't just drop it.
 * Device models call blockdev_mark_auto_del() to schedule the
 * automatic deletion, and generic qdev code calls blockdev_auto_del()
 * when deletion is actually safe.
 */
void blockdev_mark_auto_del(BlockDriverState *bs)
{
    DriveInfo *dinfo = drive_get_by_blockdev(bs);

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    if (bs->job) {
        block_job_cancel(bs->job);
    }
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    if (dinfo) {
        dinfo->auto_del = 1;
    }
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}

void blockdev_auto_del(BlockDriverState *bs)
{
    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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static int drive_index_to_bus_id(BlockInterfaceType type, int index)
{
    int max_devs = if_max_devs[type];
    return max_devs ? index / max_devs : 0;
}

static int drive_index_to_unit_id(BlockInterfaceType type, int index)
{
    int max_devs = if_max_devs[type];
    return max_devs ? index % max_devs : index;
}

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QemuOpts *drive_def(const char *optstr)
{
    return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
}

QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
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                    const char *optstr)
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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) {
        return NULL;
    }
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    if (type != IF_DEFAULT) {
        qemu_opt_set(opts, "if", if_name[type]);
    }
    if (index >= 0) {
        snprintf(buf, sizeof(buf), "%d", index);
        qemu_opt_set(opts, "index", buf);
    }
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    if (file)
        qemu_opt_set(opts, "file", file);
    return opts;
}

DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
{
    DriveInfo *dinfo;

    /* seek interface, bus and unit */

    QTAILQ_FOREACH(dinfo, &drives, next) {
        if (dinfo->type == type &&
	    dinfo->bus == bus &&
	    dinfo->unit == unit)
            return dinfo;
    }

    return NULL;
}

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DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
{
    return drive_get(type,
                     drive_index_to_bus_id(type, index),
                     drive_index_to_unit_id(type, index));
}

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int drive_get_max_bus(BlockInterfaceType type)
{
    int max_bus;
    DriveInfo *dinfo;

    max_bus = -1;
    QTAILQ_FOREACH(dinfo, &drives, next) {
        if(dinfo->type == type &&
           dinfo->bus > max_bus)
            max_bus = dinfo->bus;
    }
    return max_bus;
}

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/* Get a block device.  This should only be used for single-drive devices
   (e.g. SD/Floppy/MTD).  Multi-disk devices (scsi/ide) should use the
   appropriate bus.  */
DriveInfo *drive_get_next(BlockInterfaceType type)
{
    static int next_block_unit[IF_COUNT];

    return drive_get(type, 0, next_block_unit[type]++);
}

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DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
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{
    DriveInfo *dinfo;

    QTAILQ_FOREACH(dinfo, &drives, next) {
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        if (dinfo->bdrv == bs) {
            return dinfo;
        }
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    }
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    return NULL;
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}

static void bdrv_format_print(void *opaque, const char *name)
{
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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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{
    qemu_opts_del(dinfo->opts);
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    bdrv_unref(dinfo->bdrv);
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    g_free(dinfo->id);
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    QTAILQ_REMOVE(&drives, dinfo, next);
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    g_free(dinfo->serial);
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    g_free(dinfo);
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}

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void drive_put_ref(DriveInfo *dinfo)
{
    assert(dinfo->refcount);
    if (--dinfo->refcount == 0) {
        drive_uninit(dinfo);
    }
}

void drive_get_ref(DriveInfo *dinfo)
{
    dinfo->refcount++;
}

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typedef struct {
    QEMUBH *bh;
    DriveInfo *dinfo;
} DrivePutRefBH;

static void drive_put_ref_bh(void *opaque)
{
    DrivePutRefBH *s = opaque;

    drive_put_ref(s->dinfo);
    qemu_bh_delete(s->bh);
    g_free(s);
}

/*
 * Release a drive reference in a BH
 *
 * It is not possible to use drive_put_ref() from a callback function when the
 * callers still need the drive.  In such cases we schedule a BH to release the
 * reference.
 */
static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
{
    DrivePutRefBH *s;

    s = g_new(DrivePutRefBH, 1);
    s->bh = qemu_bh_new(drive_put_ref_bh, s);
    s->dinfo = dinfo;
    qemu_bh_schedule(s->bh);
}

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static int parse_block_error_action(const char *buf, bool is_read)
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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",
                     buf, is_read ? "read" : "write");
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        return -1;
    }
}

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static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
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{
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    if (throttle_conflicting(cfg)) {
        error_setg(errp, "bps/iops/max total values and read/write values"
                         " cannot be used at the same time");
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        return false;
    }

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    if (!throttle_is_valid(cfg)) {
        error_setg(errp, "bps/iops/maxs values must be 0 or greater");
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        return false;
    }

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    return true;
}

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static DriveInfo *blockdev_init(QemuOpts *all_opts,
                                BlockInterfaceType block_default_type)
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{
    const char *buf;
    const char *file = NULL;
    const char *serial;
    const char *mediastr = "";
    BlockInterfaceType type;
    enum { MEDIA_DISK, MEDIA_CDROM } media;
    int bus_id, unit_id;
    int cyls, heads, secs, translation;
    int max_devs;
    int index;
    int ro = 0;
    int bdrv_flags = 0;
    int on_read_error, on_write_error;
    const char *devaddr;
    DriveInfo *dinfo;
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    ThrottleConfig cfg;
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    int snapshot = 0;
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    bool copy_on_read;
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    int ret;
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    Error *error = NULL;
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    QemuOpts *opts;
    QDict *bs_opts;
    const char *id;
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    bool has_driver_specific_opts;
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    BlockDriver *drv = NULL;
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    translation = BIOS_ATA_TRANSLATION_AUTO;
    media = MEDIA_DISK;

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    /* Check common options by copying from all_opts to opts, all other options
     * are stored in bs_opts. */
    id = qemu_opts_id(all_opts);
    opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
    if (error_is_set(&error)) {
        qerror_report_err(error);
        error_free(error);
        return NULL;
    }

    bs_opts = qdict_new();
    qemu_opts_to_qdict(all_opts, bs_opts);
    qemu_opts_absorb_qdict(opts, bs_opts, &error);
    if (error_is_set(&error)) {
        qerror_report_err(error);
        error_free(error);
        return NULL;
    }

    if (id) {
        qdict_del(bs_opts, "id");
    }

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    has_driver_specific_opts = !!qdict_size(bs_opts);

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    /* extract parameters */
    bus_id  = qemu_opt_get_number(opts, "bus", 0);
    unit_id = qemu_opt_get_number(opts, "unit", -1);
    index   = qemu_opt_get_number(opts, "index", -1);

    cyls  = qemu_opt_get_number(opts, "cyls", 0);
    heads = qemu_opt_get_number(opts, "heads", 0);
    secs  = qemu_opt_get_number(opts, "secs", 0);

    snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
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    ro = qemu_opt_get_bool(opts, "read-only", 0);
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    copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
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    file = qemu_opt_get(opts, "file");
    serial = qemu_opt_get(opts, "serial");

    if ((buf = qemu_opt_get(opts, "if")) != NULL) {
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        for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
            ;
        if (type == IF_COUNT) {
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            error_report("unsupported bus type '%s'", buf);
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            return NULL;
	}
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    } else {
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        type = block_default_type;
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    }
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    max_devs = if_max_devs[type];
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    if (cyls || heads || secs) {
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        if (cyls < 1) {
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            error_report("invalid physical cyls number");
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	    return NULL;
	}
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        if (heads < 1) {
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            error_report("invalid physical heads number");
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	    return NULL;
	}
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        if (secs < 1) {
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            error_report("invalid physical secs number");
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	    return NULL;
	}
    }

    if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
        if (!cyls) {
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            error_report("'%s' trans must be used with cyls, heads and secs",
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                         buf);
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            return NULL;
        }
        if (!strcmp(buf, "none"))
            translation = BIOS_ATA_TRANSLATION_NONE;
        else if (!strcmp(buf, "lba"))
            translation = BIOS_ATA_TRANSLATION_LBA;
        else if (!strcmp(buf, "auto"))
            translation = BIOS_ATA_TRANSLATION_AUTO;
	else {
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            error_report("'%s' invalid translation type", buf);
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	    return NULL;
	}
    }

    if ((buf = qemu_opt_get(opts, "media")) != NULL) {
        if (!strcmp(buf, "disk")) {
	    media = MEDIA_DISK;
	} else if (!strcmp(buf, "cdrom")) {
            if (cyls || secs || heads) {
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                error_report("CHS can't be set with media=%s", buf);
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	        return NULL;
            }
	    media = MEDIA_CDROM;
	} else {
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	    error_report("'%s' invalid media", buf);
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	    return NULL;
	}
    }

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    if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
        if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
            error_report("invalid discard option");
            return NULL;
        }
    }

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    if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
        bdrv_flags |= BDRV_O_CACHE_WB;
    }
    if (qemu_opt_get_bool(opts, "cache.direct", false)) {
        bdrv_flags |= BDRV_O_NOCACHE;
    }
    if (qemu_opt_get_bool(opts, "cache.no-flush", true)) {
        bdrv_flags |= BDRV_O_NO_FLUSH;
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    }

#ifdef CONFIG_LINUX_AIO
    if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
        if (!strcmp(buf, "native")) {
            bdrv_flags |= BDRV_O_NATIVE_AIO;
        } else if (!strcmp(buf, "threads")) {
            /* this is the default */
        } else {
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           error_report("invalid aio option");
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           return NULL;
        }
    }
#endif

    if ((buf = qemu_opt_get(opts, "format")) != NULL) {
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        if (is_help_option(buf)) {
            error_printf("Supported formats:");
            bdrv_iterate_format(bdrv_format_print, NULL);
            error_printf("\n");
            return NULL;
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        }
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        drv = bdrv_find_whitelisted_format(buf, ro);
        if (!drv) {
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            if (!ro && bdrv_find_whitelisted_format(buf, !ro)) {
                error_report("'%s' can be only used as read-only device.", buf);
            } else {
                error_report("'%s' invalid format", buf);
            }
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            return NULL;
        }
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    }

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    /* disk I/O throttling */
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    memset(&cfg, 0, sizeof(cfg));
    cfg.buckets[THROTTLE_BPS_TOTAL].avg =
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        qemu_opt_get_number(opts, "throttling.bps-total", 0);
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    cfg.buckets[THROTTLE_BPS_READ].avg  =
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        qemu_opt_get_number(opts, "throttling.bps-read", 0);
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    cfg.buckets[THROTTLE_BPS_WRITE].avg =
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        qemu_opt_get_number(opts, "throttling.bps-write", 0);
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    cfg.buckets[THROTTLE_OPS_TOTAL].avg =
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        qemu_opt_get_number(opts, "throttling.iops-total", 0);
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    cfg.buckets[THROTTLE_OPS_READ].avg =
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        qemu_opt_get_number(opts, "throttling.iops-read", 0);
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    cfg.buckets[THROTTLE_OPS_WRITE].avg =
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        qemu_opt_get_number(opts, "throttling.iops-write", 0);
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    cfg.buckets[THROTTLE_BPS_TOTAL].max =
        qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
    cfg.buckets[THROTTLE_BPS_READ].max  =
        qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
    cfg.buckets[THROTTLE_BPS_WRITE].max =
        qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
    cfg.buckets[THROTTLE_OPS_TOTAL].max =
        qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
    cfg.buckets[THROTTLE_OPS_READ].max =
        qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
    cfg.buckets[THROTTLE_OPS_WRITE].max =
        qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
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    cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0);
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    if (!check_throttle_config(&cfg, &error)) {
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        error_report("%s", error_get_pretty(error));
        error_free(error);
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        return NULL;
    }

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    if (qemu_opt_get(opts, "boot") != NULL) {
        fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
                "ignored. Future versions will reject this parameter. Please "
                "update your scripts.\n");
    }

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    on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
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    if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
        if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
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            error_report("werror is not supported by this bus type");
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            return NULL;
        }

        on_write_error = parse_block_error_action(buf, 0);
        if (on_write_error < 0) {
            return NULL;
        }
    }

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    on_read_error = BLOCKDEV_ON_ERROR_REPORT;
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    if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
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        if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
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            error_report("rerror is not supported by this bus type");
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            return NULL;
        }

        on_read_error = parse_block_error_action(buf, 1);
        if (on_read_error < 0) {
            return NULL;
        }
    }

    if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
        if (type != IF_VIRTIO) {
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            error_report("addr is not supported by this bus type");
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            return NULL;
        }
    }

    /* compute bus and unit according index */

    if (index != -1) {
        if (bus_id != 0 || unit_id != -1) {
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            error_report("index cannot be used with bus and unit");
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            return NULL;
        }
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        bus_id = drive_index_to_bus_id(type, index);
        unit_id = drive_index_to_unit_id(type, index);
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    }

    /* if user doesn't specify a unit_id,
     * try to find the first free
     */

    if (unit_id == -1) {
       unit_id = 0;
       while (drive_get(type, bus_id, unit_id) != NULL) {
           unit_id++;
           if (max_devs && unit_id >= max_devs) {
               unit_id -= max_devs;
               bus_id++;
           }
       }
    }

    /* check unit id */

    if (max_devs && unit_id >= max_devs) {
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        error_report("unit %d too big (max is %d)",
                     unit_id, max_devs - 1);
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        return NULL;
    }

    /*
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     * catch multiple definitions
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     */

    if (drive_get(type, bus_id, unit_id) != NULL) {
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        error_report("drive with bus=%d, unit=%d (index=%d) exists",
                     bus_id, unit_id, index);
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        return NULL;
    }

    /* init */

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    dinfo = g_malloc0(sizeof(*dinfo));
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    if ((buf = qemu_opts_id(opts)) != NULL) {
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        dinfo->id = g_strdup(buf);
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    } else {
        /* no id supplied -> create one */
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        dinfo->id = g_malloc0(32);
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        if (type == IF_IDE || type == IF_SCSI)
            mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
        if (max_devs)
            snprintf(dinfo->id, 32, "%s%i%s%i",
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                     if_name[type], bus_id, mediastr, unit_id);
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        else
            snprintf(dinfo->id, 32, "%s%s%i",
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                     if_name[type], mediastr, unit_id);
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    }
    dinfo->bdrv = bdrv_new(dinfo->id);
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    dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
    dinfo->bdrv->read_only = ro;
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    dinfo->devaddr = devaddr;
    dinfo->type = type;
    dinfo->bus = bus_id;
    dinfo->unit = unit_id;
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    dinfo->cyls = cyls;
    dinfo->heads = heads;
    dinfo->secs = secs;
    dinfo->trans = translation;
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    dinfo->opts = all_opts;
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    dinfo->refcount = 1;
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    if (serial != NULL) {
        dinfo->serial = g_strdup(serial);
    }
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    QTAILQ_INSERT_TAIL(&drives, dinfo, next);

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    bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);

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    /* disk I/O throttling */
639 640 641 642
    if (throttle_enabled(&cfg)) {
        bdrv_io_limits_enable(dinfo->bdrv);
        bdrv_set_io_limits(dinfo->bdrv, &cfg);
    }
643

644 645 646 647 648
    switch(type) {
    case IF_IDE:
    case IF_SCSI:
    case IF_XEN:
    case IF_NONE:
649
        dinfo->media_cd = media == MEDIA_CDROM;
650 651 652 653 654 655 656
        break;
    case IF_SD:
    case IF_FLOPPY:
    case IF_PFLASH:
    case IF_MTD:
        break;
    case IF_VIRTIO:
657
    {
658
        /* add virtio block device */
659 660
        QemuOpts *devopts;
        devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
661
        if (arch_type == QEMU_ARCH_S390X) {
662
            qemu_opt_set(devopts, "driver", "virtio-blk-s390");
663
        } else {
664
            qemu_opt_set(devopts, "driver", "virtio-blk-pci");
665
        }
666
        qemu_opt_set(devopts, "drive", dinfo->id);
667
        if (devaddr)
668
            qemu_opt_set(devopts, "addr", devaddr);
669
        break;
670
    }
671
    default:
672 673
        abort();
    }
674
    if (!file || !*file) {
675
        if (has_driver_specific_opts) {
676 677 678 679
            file = NULL;
        } else {
            return dinfo;
        }
680 681 682 683 684 685 686
    }
    if (snapshot) {
        /* always use cache=unsafe with snapshot */
        bdrv_flags &= ~BDRV_O_CACHE_MASK;
        bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
    }

687 688 689 690
    if (copy_on_read) {
        bdrv_flags |= BDRV_O_COPY_ON_READ;
    }

691 692 693 694
    if (runstate_check(RUN_STATE_INMIGRATE)) {
        bdrv_flags |= BDRV_O_INCOMING;
    }

695 696 697 698
    if (media == MEDIA_CDROM) {
        /* CDROM is fine for any interface, don't check.  */
        ro = 1;
    } else if (ro == 1) {
699 700
        if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
            type != IF_NONE && type != IF_PFLASH) {
701
            error_report("read-only not supported by this bus type");
702
            goto err;
703 704 705 706 707
        }
    }

    bdrv_flags |= ro ? 0 : BDRV_O_RDWR;

708
    if (ro && copy_on_read) {
709
        error_report("warning: disabling copy_on_read on read-only drive");
710 711
    }

712
    QINCREF(bs_opts);
713
    ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv);
714

715
    if (ret < 0) {
716 717
        if (ret == -EMEDIUMTYPE) {
            error_report("could not open disk image %s: not in %s format",
718 719
                         file ?: dinfo->id, drv ? drv->format_name :
                         qdict_get_str(bs_opts, "driver"));
720 721
        } else {
            error_report("could not open disk image %s: %s",
722
                         file ?: dinfo->id, strerror(-ret));
723
        }
724
        goto err;
725 726 727 728
    }

    if (bdrv_key_required(dinfo->bdrv))
        autostart = 0;
729

730
    QDECREF(bs_opts);
731 732
    qemu_opts_del(opts);

733
    return dinfo;
734 735

err:
736 737
    qemu_opts_del(opts);
    QDECREF(bs_opts);
F
Fam Zheng 已提交
738
    bdrv_unref(dinfo->bdrv);
739
    g_free(dinfo->id);
740
    QTAILQ_REMOVE(&drives, dinfo, next);
741
    g_free(dinfo);
742
    return NULL;
743 744
}

745 746 747 748 749 750 751 752 753 754 755 756 757
static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
{
    const char *value;

    value = qemu_opt_get(opts, from);
    if (value) {
        qemu_opt_set(opts, to, value);
        qemu_opt_unset(opts, from);
    }
}

DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
{
K
Kevin Wolf 已提交
758 759
    const char *value;

760 761 762 763 764 765 766 767 768
    /* Change legacy command line options into QMP ones */
    qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
    qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
    qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");

    qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
    qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
    qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");

769 770 771 772 773 774 775 776
    qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max");
    qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max");
    qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max");

    qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max");
    qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max");
    qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max");

777 778 779
    qemu_opt_rename(all_opts,
                    "iops_size", "throttling.iops-size");

780 781
    qemu_opt_rename(all_opts, "readonly", "read-only");

K
Kevin Wolf 已提交
782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
    value = qemu_opt_get(all_opts, "cache");
    if (value) {
        int flags = 0;

        if (bdrv_parse_cache_flags(value, &flags) != 0) {
            error_report("invalid cache option");
            return NULL;
        }

        /* Specific options take precedence */
        if (!qemu_opt_get(all_opts, "cache.writeback")) {
            qemu_opt_set_bool(all_opts, "cache.writeback",
                              !!(flags & BDRV_O_CACHE_WB));
        }
        if (!qemu_opt_get(all_opts, "cache.direct")) {
            qemu_opt_set_bool(all_opts, "cache.direct",
                              !!(flags & BDRV_O_NOCACHE));
        }
        if (!qemu_opt_get(all_opts, "cache.no-flush")) {
            qemu_opt_set_bool(all_opts, "cache.no-flush",
                              !!(flags & BDRV_O_NO_FLUSH));
        }
        qemu_opt_unset(all_opts, "cache");
    }

807 808 809
    return blockdev_init(all_opts, block_default_type);
}

810 811 812
void do_commit(Monitor *mon, const QDict *qdict)
{
    const char *device = qdict_get_str(qdict, "device");
813
    BlockDriverState *bs;
814
    int ret;
815

816
    if (!strcmp(device, "all")) {
817
        ret = bdrv_commit_all();
818 819
    } else {
        bs = bdrv_find(device);
820
        if (!bs) {
821
            monitor_printf(mon, "Device '%s' not found\n", device);
822
            return;
823
        }
824
        ret = bdrv_commit(bs);
825 826 827 828
    }
    if (ret < 0) {
        monitor_printf(mon, "'commit' error for '%s': %s\n", device,
                       strerror(-ret));
829 830 831
    }
}

832 833
static void blockdev_do_action(int kind, void *data, Error **errp)
{
834 835
    TransactionAction action;
    TransactionActionList list;
836 837 838 839 840 841 842 843

    action.kind = kind;
    action.data = data;
    list.value = &action;
    list.next = NULL;
    qmp_transaction(&list, errp);
}

844 845
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
                                bool has_format, const char *format,
846
                                bool has_mode, enum NewImageMode mode,
847
                                Error **errp)
848
{
849 850 851 852 853 854 855 856
    BlockdevSnapshot snapshot = {
        .device = (char *) device,
        .snapshot_file = (char *) snapshot_file,
        .has_format = has_format,
        .format = (char *) format,
        .has_mode = has_mode,
        .mode = mode,
    };
857 858
    blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
                       &snapshot, errp);
859 860
}

861 862

/* New and old BlockDriverState structs for group snapshots */
863

864
typedef struct BlkTransactionState BlkTransactionState;
865 866 867 868 869 870 871

/* Only prepare() may fail. In a single transaction, only one of commit() or
   abort() will be called, clean() will always be called if it present. */
typedef struct BdrvActionOps {
    /* Size of state struct, in bytes. */
    size_t instance_size;
    /* Prepare the work, must NOT be NULL. */
872
    void (*prepare)(BlkTransactionState *common, Error **errp);
873
    /* Commit the changes, can be NULL. */
874
    void (*commit)(BlkTransactionState *common);
875
    /* Abort the changes on fail, can be NULL. */
876
    void (*abort)(BlkTransactionState *common);
877
    /* Clean up resource in the end, can be NULL. */
878
    void (*clean)(BlkTransactionState *common);
879 880 881 882 883 884 885
} BdrvActionOps;

/*
 * This structure must be arranged as first member in child type, assuming
 * that compiler will also arrange it to the same address with parent instance.
 * Later it will be used in free().
 */
886
struct BlkTransactionState {
887
    TransactionAction *action;
888
    const BdrvActionOps *ops;
889
    QSIMPLEQ_ENTRY(BlkTransactionState) entry;
890 891 892
};

/* external snapshot private data */
893 894
typedef struct ExternalSnapshotState {
    BlkTransactionState common;
895 896
    BlockDriverState *old_bs;
    BlockDriverState *new_bs;
897
} ExternalSnapshotState;
898

899
static void external_snapshot_prepare(BlkTransactionState *common,
900 901 902 903 904
                                      Error **errp)
{
    BlockDriver *drv;
    int flags, ret;
    Error *local_err = NULL;
905 906 907 908
    const char *device;
    const char *new_image_file;
    const char *format = "qcow2";
    enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
909 910
    ExternalSnapshotState *state =
                             DO_UPCAST(ExternalSnapshotState, common, common);
911
    TransactionAction *action = common->action;
912

913
    /* get parameters */
914
    g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
915 916 917 918 919 920 921 922 923 924 925

    device = action->blockdev_snapshot_sync->device;
    new_image_file = action->blockdev_snapshot_sync->snapshot_file;
    if (action->blockdev_snapshot_sync->has_format) {
        format = action->blockdev_snapshot_sync->format;
    }
    if (action->blockdev_snapshot_sync->has_mode) {
        mode = action->blockdev_snapshot_sync->mode;
    }

    /* start processing */
926 927 928 929 930 931
    drv = bdrv_find_format(format);
    if (!drv) {
        error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
        return;
    }

932 933
    state->old_bs = bdrv_find(device);
    if (!state->old_bs) {
934 935 936 937
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
    }

938
    if (!bdrv_is_inserted(state->old_bs)) {
939 940 941 942
        error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
        return;
    }

943
    if (bdrv_in_use(state->old_bs)) {
944 945 946 947
        error_set(errp, QERR_DEVICE_IN_USE, device);
        return;
    }

948 949
    if (!bdrv_is_read_only(state->old_bs)) {
        if (bdrv_flush(state->old_bs)) {
950 951 952 953 954
            error_set(errp, QERR_IO_ERROR);
            return;
        }
    }

955
    flags = state->old_bs->open_flags;
956 957 958 959

    /* create new image w/backing file */
    if (mode != NEW_IMAGE_MODE_EXISTING) {
        bdrv_img_create(new_image_file, format,
960 961
                        state->old_bs->filename,
                        state->old_bs->drv->format_name,
962 963 964 965 966 967 968 969
                        NULL, -1, flags, &local_err, false);
        if (error_is_set(&local_err)) {
            error_propagate(errp, local_err);
            return;
        }
    }

    /* We will manually add the backing_hd field to the bs later */
970
    state->new_bs = bdrv_new("");
971 972
    /* TODO Inherit bs->options or only take explicit options with an
     * extended QMP command? */
973
    ret = bdrv_open(state->new_bs, new_image_file, NULL,
974 975
                    flags | BDRV_O_NO_BACKING, drv);
    if (ret != 0) {
976
        error_setg_file_open(errp, -ret, new_image_file);
977 978 979
    }
}

980
static void external_snapshot_commit(BlkTransactionState *common)
981
{
982 983
    ExternalSnapshotState *state =
                             DO_UPCAST(ExternalSnapshotState, common, common);
984

985 986
    /* This removes our old bs and adds the new bs */
    bdrv_append(state->new_bs, state->old_bs);
987 988 989
    /* We don't need (or want) to use the transactional
     * bdrv_reopen_multiple() across all the entries at once, because we
     * don't want to abort all of them if one of them fails the reopen */
990
    bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
991 992 993
                NULL);
}

994
static void external_snapshot_abort(BlkTransactionState *common)
995
{
996 997 998
    ExternalSnapshotState *state =
                             DO_UPCAST(ExternalSnapshotState, common, common);
    if (state->new_bs) {
F
Fam Zheng 已提交
999
        bdrv_unref(state->new_bs);
1000 1001 1002
    }
}

1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019
typedef struct DriveBackupState {
    BlkTransactionState common;
    BlockDriverState *bs;
    BlockJob *job;
} DriveBackupState;

static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
{
    DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
    DriveBackup *backup;
    Error *local_err = NULL;

    assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
    backup = common->action->drive_backup;

    qmp_drive_backup(backup->device, backup->target,
                     backup->has_format, backup->format,
1020
                     backup->sync,
1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
                     backup->has_mode, backup->mode,
                     backup->has_speed, backup->speed,
                     backup->has_on_source_error, backup->on_source_error,
                     backup->has_on_target_error, backup->on_target_error,
                     &local_err);
    if (error_is_set(&local_err)) {
        error_propagate(errp, local_err);
        state->bs = NULL;
        state->job = NULL;
        return;
    }

    state->bs = bdrv_find(backup->device);
    state->job = state->bs->job;
}

static void drive_backup_abort(BlkTransactionState *common)
{
    DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
    BlockDriverState *bs = state->bs;

    /* Only cancel if it's the job we started */
    if (bs && bs->job && bs->job == state->job) {
        block_job_cancel_sync(bs->job);
    }
}

1048 1049 1050 1051 1052 1053 1054
static void abort_prepare(BlkTransactionState *common, Error **errp)
{
    error_setg(errp, "Transaction aborted using Abort action");
}

static void abort_commit(BlkTransactionState *common)
{
1055
    g_assert_not_reached(); /* this action never succeeds */
1056 1057
}

1058
static const BdrvActionOps actions[] = {
1059
    [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
1060
        .instance_size = sizeof(ExternalSnapshotState),
1061 1062 1063 1064
        .prepare  = external_snapshot_prepare,
        .commit   = external_snapshot_commit,
        .abort = external_snapshot_abort,
    },
1065 1066 1067 1068 1069
    [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
        .instance_size = sizeof(DriveBackupState),
        .prepare = drive_backup_prepare,
        .abort = drive_backup_abort,
    },
1070 1071 1072 1073 1074
    [TRANSACTION_ACTION_KIND_ABORT] = {
        .instance_size = sizeof(BlkTransactionState),
        .prepare = abort_prepare,
        .commit = abort_commit,
    },
1075 1076
};

1077 1078 1079 1080 1081
/*
 * 'Atomic' group snapshots.  The snapshots are taken as a set, and if any fail
 *  then we do not pivot any of the devices in the group, and abandon the
 *  snapshots
 */
1082
void qmp_transaction(TransactionActionList *dev_list, Error **errp)
1083
{
1084
    TransactionActionList *dev_entry = dev_list;
1085
    BlkTransactionState *state, *next;
1086
    Error *local_err = NULL;
1087

1088
    QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
1089 1090 1091 1092 1093 1094 1095
    QSIMPLEQ_INIT(&snap_bdrv_states);

    /* drain all i/o before any snapshots */
    bdrv_drain_all();

    /* We don't do anything in this loop that commits us to the snapshot */
    while (NULL != dev_entry) {
1096
        TransactionAction *dev_info = NULL;
1097
        const BdrvActionOps *ops;
1098

1099 1100 1101
        dev_info = dev_entry->value;
        dev_entry = dev_entry->next;

1102 1103 1104
        assert(dev_info->kind < ARRAY_SIZE(actions));

        ops = &actions[dev_info->kind];
1105 1106 1107 1108
        state = g_malloc0(ops->instance_size);
        state->ops = ops;
        state->action = dev_info;
        QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
1109

1110
        state->ops->prepare(state, &local_err);
1111 1112 1113
        if (error_is_set(&local_err)) {
            error_propagate(errp, local_err);
            goto delete_and_fail;
1114 1115 1116
        }
    }

1117
    QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1118 1119 1120
        if (state->ops->commit) {
            state->ops->commit(state);
        }
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
    }

    /* success */
    goto exit;

delete_and_fail:
    /*
    * failure, and it is all-or-none; abandon each new bs, and keep using
    * the original bs for all images
    */
1131 1132 1133
    QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
        if (state->ops->abort) {
            state->ops->abort(state);
1134
        }
1135 1136
    }
exit:
1137 1138 1139
    QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
        if (state->ops->clean) {
            state->ops->clean(state);
1140
        }
1141
        g_free(state);
1142 1143 1144 1145
    }
}


1146
static void eject_device(BlockDriverState *bs, int force, Error **errp)
1147
{
1148 1149 1150 1151
    if (bdrv_in_use(bs)) {
        error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
        return;
    }
1152
    if (!bdrv_dev_has_removable_media(bs)) {
1153 1154
        error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
        return;
1155
    }
1156

P
Paolo Bonzini 已提交
1157 1158 1159
    if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
        bdrv_dev_eject_request(bs, force);
        if (!force) {
1160 1161
            error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
            return;
P
Paolo Bonzini 已提交
1162
        }
1163
    }
1164

1165
    bdrv_close(bs);
1166 1167
}

L
Luiz Capitulino 已提交
1168
void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
1169 1170 1171
{
    BlockDriverState *bs;

L
Luiz Capitulino 已提交
1172
    bs = bdrv_find(device);
1173
    if (!bs) {
L
Luiz Capitulino 已提交
1174 1175
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
1176 1177
    }

L
Luiz Capitulino 已提交
1178
    eject_device(bs, force, errp);
1179 1180
}

L
Luiz Capitulino 已提交
1181
void qmp_block_passwd(const char *device, const char *password, Error **errp)
1182 1183 1184 1185
{
    BlockDriverState *bs;
    int err;

L
Luiz Capitulino 已提交
1186
    bs = bdrv_find(device);
1187
    if (!bs) {
L
Luiz Capitulino 已提交
1188 1189
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
1190 1191
    }

L
Luiz Capitulino 已提交
1192
    err = bdrv_set_key(bs, password);
1193
    if (err == -EINVAL) {
L
Luiz Capitulino 已提交
1194 1195
        error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
        return;
1196
    } else if (err < 0) {
L
Luiz Capitulino 已提交
1197 1198
        error_set(errp, QERR_INVALID_PASSWORD);
        return;
1199 1200 1201
    }
}

L
Luiz Capitulino 已提交
1202 1203 1204 1205
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
                                    int bdrv_flags, BlockDriver *drv,
                                    const char *password, Error **errp)
{
1206 1207 1208 1209 1210
    int ret;

    ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv);
    if (ret < 0) {
        error_setg_file_open(errp, -ret, filename);
L
Luiz Capitulino 已提交
1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
        return;
    }

    if (bdrv_key_required(bs)) {
        if (password) {
            if (bdrv_set_key(bs, password) < 0) {
                error_set(errp, QERR_INVALID_PASSWORD);
            }
        } else {
            error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
                      bdrv_get_encrypted_filename(bs));
        }
    } else if (password) {
        error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
    }
}

void qmp_change_blockdev(const char *device, const char *filename,
                         bool has_format, const char *format, Error **errp)
1230 1231 1232 1233
{
    BlockDriverState *bs;
    BlockDriver *drv = NULL;
    int bdrv_flags;
1234
    Error *err = NULL;
1235 1236 1237

    bs = bdrv_find(device);
    if (!bs) {
L
Luiz Capitulino 已提交
1238 1239
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
1240
    }
L
Luiz Capitulino 已提交
1241 1242

    if (format) {
1243
        drv = bdrv_find_whitelisted_format(format, bs->read_only);
1244
        if (!drv) {
L
Luiz Capitulino 已提交
1245 1246
            error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
            return;
1247 1248
        }
    }
L
Luiz Capitulino 已提交
1249

1250 1251
    eject_device(bs, 0, &err);
    if (error_is_set(&err)) {
L
Luiz Capitulino 已提交
1252 1253
        error_propagate(errp, err);
        return;
1254
    }
L
Luiz Capitulino 已提交
1255

1256
    bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
1257
    bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
L
Luiz Capitulino 已提交
1258 1259

    qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
1260
}
1261

Z
Zhi Yong Wu 已提交
1262
/* throttling disk I/O limits */
1263
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278
                               int64_t bps_wr,
                               int64_t iops,
                               int64_t iops_rd,
                               int64_t iops_wr,
                               bool has_bps_max,
                               int64_t bps_max,
                               bool has_bps_rd_max,
                               int64_t bps_rd_max,
                               bool has_bps_wr_max,
                               int64_t bps_wr_max,
                               bool has_iops_max,
                               int64_t iops_max,
                               bool has_iops_rd_max,
                               int64_t iops_rd_max,
                               bool has_iops_wr_max,
1279 1280 1281
                               int64_t iops_wr_max,
                               bool has_iops_size,
                               int64_t iops_size, Error **errp)
Z
Zhi Yong Wu 已提交
1282
{
1283
    ThrottleConfig cfg;
Z
Zhi Yong Wu 已提交
1284 1285
    BlockDriverState *bs;

1286
    bs = bdrv_find(device);
Z
Zhi Yong Wu 已提交
1287
    if (!bs) {
1288 1289
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
Z
Zhi Yong Wu 已提交
1290 1291
    }

1292 1293 1294 1295 1296 1297 1298 1299 1300
    memset(&cfg, 0, sizeof(cfg));
    cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
    cfg.buckets[THROTTLE_BPS_READ].avg  = bps_rd;
    cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;

    cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
    cfg.buckets[THROTTLE_OPS_READ].avg  = iops_rd;
    cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;

1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318
    if (has_bps_max) {
        cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
    }
    if (has_bps_rd_max) {
        cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
    }
    if (has_bps_wr_max) {
        cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
    }
    if (has_iops_max) {
        cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
    }
    if (has_iops_rd_max) {
        cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
    }
    if (has_iops_wr_max) {
        cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
    }
Z
Zhi Yong Wu 已提交
1319

1320 1321 1322
    if (has_iops_size) {
        cfg.op_size = iops_size;
    }
1323 1324

    if (!check_throttle_config(&cfg, errp)) {
1325
        return;
Z
Zhi Yong Wu 已提交
1326 1327
    }

1328
    if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
Z
Zhi Yong Wu 已提交
1329
        bdrv_io_limits_enable(bs);
1330
    } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) {
Z
Zhi Yong Wu 已提交
1331
        bdrv_io_limits_disable(bs);
1332 1333 1334 1335
    }

    if (bs->io_limits_enabled) {
        bdrv_set_io_limits(bs, &cfg);
Z
Zhi Yong Wu 已提交
1336 1337 1338
    }
}

1339 1340 1341 1342 1343 1344 1345 1346 1347 1348
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
    const char *id = qdict_get_str(qdict, "id");
    BlockDriverState *bs;

    bs = bdrv_find(id);
    if (!bs) {
        qerror_report(QERR_DEVICE_NOT_FOUND, id);
        return -1;
    }
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Marcelo Tosatti 已提交
1349 1350 1351 1352
    if (bdrv_in_use(bs)) {
        qerror_report(QERR_DEVICE_IN_USE, id);
        return -1;
    }
1353 1354

    /* quiesce block driver; prevent further io */
1355
    bdrv_drain_all();
1356 1357 1358
    bdrv_flush(bs);
    bdrv_close(bs);

1359
    /* if we have a device attached to this BlockDriverState
1360 1361 1362 1363
     * then we need to make the drive anonymous until the device
     * can be removed.  If this is a drive with no device backing
     * then we can just get rid of the block driver state right here.
     */
1364
    if (bdrv_get_attached_dev(bs)) {
1365
        bdrv_make_anon(bs);
1366 1367 1368 1369

        /* Further I/O must not pause the guest */
        bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
                          BLOCKDEV_ON_ERROR_REPORT);
1370 1371
    } else {
        drive_uninit(drive_get_by_blockdev(bs));
1372 1373 1374 1375
    }

    return 0;
}
1376

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Luiz Capitulino 已提交
1377
void qmp_block_resize(const char *device, int64_t size, Error **errp)
1378 1379
{
    BlockDriverState *bs;
1380
    int ret;
1381 1382 1383

    bs = bdrv_find(device);
    if (!bs) {
L
Luiz Capitulino 已提交
1384 1385
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
1386 1387 1388
    }

    if (size < 0) {
1389
        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
L
Luiz Capitulino 已提交
1390
        return;
1391 1392
    }

1393 1394 1395
    /* complete all in-flight operations before resizing the device */
    bdrv_drain_all();

1396 1397
    ret = bdrv_truncate(bs, size);
    switch (ret) {
1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412
    case 0:
        break;
    case -ENOMEDIUM:
        error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
        break;
    case -ENOTSUP:
        error_set(errp, QERR_UNSUPPORTED);
        break;
    case -EACCES:
        error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
        break;
    case -EBUSY:
        error_set(errp, QERR_DEVICE_IN_USE, device);
        break;
    default:
1413
        error_setg_errno(errp, -ret, "Could not resize");
1414
        break;
1415 1416
    }
}
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Stefan Hajnoczi 已提交
1417

1418
static void block_job_cb(void *opaque, int ret)
S
Stefan Hajnoczi 已提交
1419 1420 1421 1422
{
    BlockDriverState *bs = opaque;
    QObject *obj;

1423
    trace_block_job_cb(bs, bs->job, ret);
S
Stefan Hajnoczi 已提交
1424 1425 1426 1427 1428 1429 1430 1431

    assert(bs->job);
    obj = qobject_from_block_job(bs->job);
    if (ret < 0) {
        QDict *dict = qobject_to_qdict(obj);
        qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
    }

1432 1433 1434 1435 1436
    if (block_job_is_cancelled(bs->job)) {
        monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
    } else {
        monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
    }
S
Stefan Hajnoczi 已提交
1437
    qobject_decref(obj);
1438 1439

    drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
S
Stefan Hajnoczi 已提交
1440 1441 1442
}

void qmp_block_stream(const char *device, bool has_base,
P
Paolo Bonzini 已提交
1443 1444 1445
                      const char *base, bool has_speed, int64_t speed,
                      bool has_on_error, BlockdevOnError on_error,
                      Error **errp)
S
Stefan Hajnoczi 已提交
1446 1447
{
    BlockDriverState *bs;
1448
    BlockDriverState *base_bs = NULL;
1449
    Error *local_err = NULL;
S
Stefan Hajnoczi 已提交
1450

P
Paolo Bonzini 已提交
1451 1452 1453 1454
    if (!has_on_error) {
        on_error = BLOCKDEV_ON_ERROR_REPORT;
    }

S
Stefan Hajnoczi 已提交
1455 1456 1457 1458 1459 1460 1461
    bs = bdrv_find(device);
    if (!bs) {
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
    }

    if (base) {
1462 1463 1464 1465 1466
        base_bs = bdrv_find_backing_image(bs, base);
        if (base_bs == NULL) {
            error_set(errp, QERR_BASE_NOT_FOUND, base);
            return;
        }
S
Stefan Hajnoczi 已提交
1467 1468
    }

1469
    stream_start(bs, base_bs, base, has_speed ? speed : 0,
P
Paolo Bonzini 已提交
1470
                 on_error, block_job_cb, bs, &local_err);
1471 1472 1473
    if (error_is_set(&local_err)) {
        error_propagate(errp, local_err);
        return;
S
Stefan Hajnoczi 已提交
1474 1475
    }

1476 1477 1478 1479 1480
    /* Grab a reference so hotplug does not delete the BlockDriverState from
     * underneath us.
     */
    drive_get_ref(drive_get_by_blockdev(bs));

S
Stefan Hajnoczi 已提交
1481 1482
    trace_qmp_block_stream(bs, bs->job);
}
1483

1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
void qmp_block_commit(const char *device,
                      bool has_base, const char *base, const char *top,
                      bool has_speed, int64_t speed,
                      Error **errp)
{
    BlockDriverState *bs;
    BlockDriverState *base_bs, *top_bs;
    Error *local_err = NULL;
    /* This will be part of the QMP command, if/when the
     * BlockdevOnError change for blkmirror makes it in
     */
1495
    BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519

    /* drain all i/o before commits */
    bdrv_drain_all();

    bs = bdrv_find(device);
    if (!bs) {
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
    }

    /* default top_bs is the active layer */
    top_bs = bs;

    if (top) {
        if (strcmp(bs->filename, top) != 0) {
            top_bs = bdrv_find_backing_image(bs, top);
        }
    }

    if (top_bs == NULL) {
        error_setg(errp, "Top image file %s not found", top ? top : "NULL");
        return;
    }

1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530
    if (has_base && base) {
        base_bs = bdrv_find_backing_image(top_bs, base);
    } else {
        base_bs = bdrv_find_base(top_bs);
    }

    if (base_bs == NULL) {
        error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
        return;
    }

1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542
    commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
                &local_err);
    if (local_err != NULL) {
        error_propagate(errp, local_err);
        return;
    }
    /* Grab a reference so hotplug does not delete the BlockDriverState from
     * underneath us.
     */
    drive_get_ref(drive_get_by_blockdev(bs));
}

1543 1544
void qmp_drive_backup(const char *device, const char *target,
                      bool has_format, const char *format,
1545
                      enum MirrorSyncMode sync,
1546 1547 1548 1549 1550 1551 1552 1553
                      bool has_mode, enum NewImageMode mode,
                      bool has_speed, int64_t speed,
                      bool has_on_source_error, BlockdevOnError on_source_error,
                      bool has_on_target_error, BlockdevOnError on_target_error,
                      Error **errp)
{
    BlockDriverState *bs;
    BlockDriverState *target_bs;
1554
    BlockDriverState *source = NULL;
1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602
    BlockDriver *drv = NULL;
    Error *local_err = NULL;
    int flags;
    int64_t size;
    int ret;

    if (!has_speed) {
        speed = 0;
    }
    if (!has_on_source_error) {
        on_source_error = BLOCKDEV_ON_ERROR_REPORT;
    }
    if (!has_on_target_error) {
        on_target_error = BLOCKDEV_ON_ERROR_REPORT;
    }
    if (!has_mode) {
        mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
    }

    bs = bdrv_find(device);
    if (!bs) {
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
    }

    if (!bdrv_is_inserted(bs)) {
        error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
        return;
    }

    if (!has_format) {
        format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
    }
    if (format) {
        drv = bdrv_find_format(format);
        if (!drv) {
            error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
            return;
        }
    }

    if (bdrv_in_use(bs)) {
        error_set(errp, QERR_DEVICE_IN_USE, device);
        return;
    }

    flags = bs->open_flags | BDRV_O_RDWR;

1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614
    /* See if we have a backing HD we can use to create our new image
     * on top of. */
    if (sync == MIRROR_SYNC_MODE_TOP) {
        source = bs->backing_hd;
        if (!source) {
            sync = MIRROR_SYNC_MODE_FULL;
        }
    }
    if (sync == MIRROR_SYNC_MODE_NONE) {
        source = bs;
    }

1615 1616 1617 1618 1619 1620 1621 1622
    size = bdrv_getlength(bs);
    if (size < 0) {
        error_setg_errno(errp, -size, "bdrv_getlength failed");
        return;
    }

    if (mode != NEW_IMAGE_MODE_EXISTING) {
        assert(format && drv);
1623 1624 1625 1626 1627 1628 1629 1630
        if (source) {
            bdrv_img_create(target, format, source->filename,
                            source->drv->format_name, NULL,
                            size, flags, &local_err, false);
        } else {
            bdrv_img_create(target, format, NULL, NULL, NULL,
                            size, flags, &local_err, false);
        }
1631 1632 1633 1634 1635 1636 1637 1638 1639 1640
    }

    if (error_is_set(&local_err)) {
        error_propagate(errp, local_err);
        return;
    }

    target_bs = bdrv_new("");
    ret = bdrv_open(target_bs, target, NULL, flags, drv);
    if (ret < 0) {
F
Fam Zheng 已提交
1641
        bdrv_unref(target_bs);
1642 1643 1644 1645
        error_setg_file_open(errp, -ret, target);
        return;
    }

1646
    backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
1647 1648
                 block_job_cb, bs, &local_err);
    if (local_err != NULL) {
F
Fam Zheng 已提交
1649
        bdrv_unref(target_bs);
1650 1651 1652 1653 1654 1655 1656 1657 1658 1659
        error_propagate(errp, local_err);
        return;
    }

    /* Grab a reference so hotplug does not delete the BlockDriverState from
     * underneath us.
     */
    drive_get_ref(drive_get_by_blockdev(bs));
}

1660 1661
#define DEFAULT_MIRROR_BUF_SIZE   (10 << 20)

P
Paolo Bonzini 已提交
1662 1663 1664 1665
void qmp_drive_mirror(const char *device, const char *target,
                      bool has_format, const char *format,
                      enum MirrorSyncMode sync,
                      bool has_mode, enum NewImageMode mode,
1666
                      bool has_speed, int64_t speed,
1667
                      bool has_granularity, uint32_t granularity,
1668
                      bool has_buf_size, int64_t buf_size,
1669 1670 1671
                      bool has_on_source_error, BlockdevOnError on_source_error,
                      bool has_on_target_error, BlockdevOnError on_target_error,
                      Error **errp)
P
Paolo Bonzini 已提交
1672 1673 1674 1675 1676 1677
{
    BlockDriverState *bs;
    BlockDriverState *source, *target_bs;
    BlockDriver *drv = NULL;
    Error *local_err = NULL;
    int flags;
1678
    int64_t size;
P
Paolo Bonzini 已提交
1679 1680 1681 1682 1683
    int ret;

    if (!has_speed) {
        speed = 0;
    }
1684 1685 1686 1687 1688 1689
    if (!has_on_source_error) {
        on_source_error = BLOCKDEV_ON_ERROR_REPORT;
    }
    if (!has_on_target_error) {
        on_target_error = BLOCKDEV_ON_ERROR_REPORT;
    }
P
Paolo Bonzini 已提交
1690 1691 1692
    if (!has_mode) {
        mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
    }
1693 1694 1695
    if (!has_granularity) {
        granularity = 0;
    }
1696 1697 1698 1699
    if (!has_buf_size) {
        buf_size = DEFAULT_MIRROR_BUF_SIZE;
    }

1700 1701 1702 1703 1704 1705 1706 1707
    if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
        error_set(errp, QERR_INVALID_PARAMETER, device);
        return;
    }
    if (granularity & (granularity - 1)) {
        error_set(errp, QERR_INVALID_PARAMETER, device);
        return;
    }
P
Paolo Bonzini 已提交
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741

    bs = bdrv_find(device);
    if (!bs) {
        error_set(errp, QERR_DEVICE_NOT_FOUND, device);
        return;
    }

    if (!bdrv_is_inserted(bs)) {
        error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
        return;
    }

    if (!has_format) {
        format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
    }
    if (format) {
        drv = bdrv_find_format(format);
        if (!drv) {
            error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
            return;
        }
    }

    if (bdrv_in_use(bs)) {
        error_set(errp, QERR_DEVICE_IN_USE, device);
        return;
    }

    flags = bs->open_flags | BDRV_O_RDWR;
    source = bs->backing_hd;
    if (!source && sync == MIRROR_SYNC_MODE_TOP) {
        sync = MIRROR_SYNC_MODE_FULL;
    }

1742 1743 1744 1745 1746 1747
    size = bdrv_getlength(bs);
    if (size < 0) {
        error_setg_errno(errp, -size, "bdrv_getlength failed");
        return;
    }

P
Paolo Bonzini 已提交
1748 1749 1750
    if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
        /* create new image w/o backing file */
        assert(format && drv);
1751
        bdrv_img_create(target, format,
1752
                        NULL, NULL, NULL, size, flags, &local_err, false);
P
Paolo Bonzini 已提交
1753 1754 1755 1756 1757 1758 1759
    } else {
        switch (mode) {
        case NEW_IMAGE_MODE_EXISTING:
            ret = 0;
            break;
        case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
            /* create new image with backing file */
1760 1761 1762
            bdrv_img_create(target, format,
                            source->filename,
                            source->drv->format_name,
1763
                            NULL, size, flags, &local_err, false);
P
Paolo Bonzini 已提交
1764 1765 1766 1767 1768 1769
            break;
        default:
            abort();
        }
    }

1770 1771
    if (error_is_set(&local_err)) {
        error_propagate(errp, local_err);
P
Paolo Bonzini 已提交
1772 1773 1774
        return;
    }

1775 1776 1777
    /* Mirroring takes care of copy-on-write using the source's backing
     * file.
     */
P
Paolo Bonzini 已提交
1778
    target_bs = bdrv_new("");
1779
    ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
P
Paolo Bonzini 已提交
1780
    if (ret < 0) {
F
Fam Zheng 已提交
1781
        bdrv_unref(target_bs);
1782
        error_setg_file_open(errp, -ret, target);
P
Paolo Bonzini 已提交
1783 1784 1785
        return;
    }

1786
    mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
1787
                 on_source_error, on_target_error,
1788
                 block_job_cb, bs, &local_err);
P
Paolo Bonzini 已提交
1789
    if (local_err != NULL) {
F
Fam Zheng 已提交
1790
        bdrv_unref(target_bs);
P
Paolo Bonzini 已提交
1791 1792 1793 1794 1795 1796 1797 1798 1799 1800
        error_propagate(errp, local_err);
        return;
    }

    /* Grab a reference so hotplug does not delete the BlockDriverState from
     * underneath us.
     */
    drive_get_ref(drive_get_by_blockdev(bs));
}

1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811
static BlockJob *find_block_job(const char *device)
{
    BlockDriverState *bs;

    bs = bdrv_find(device);
    if (!bs || !bs->job) {
        return NULL;
    }
    return bs->job;
}

1812
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
1813 1814 1815 1816
{
    BlockJob *job = find_block_job(device);

    if (!job) {
1817
        error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1818 1819 1820
        return;
    }

1821
    block_job_set_speed(job, speed, errp);
1822
}
1823

1824 1825
void qmp_block_job_cancel(const char *device,
                          bool has_force, bool force, Error **errp)
1826 1827 1828
{
    BlockJob *job = find_block_job(device);

1829 1830 1831 1832
    if (!has_force) {
        force = false;
    }

1833
    if (!job) {
1834
        error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
1835 1836
        return;
    }
1837
    if (job->paused && !force) {
1838 1839 1840
        error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
        return;
    }
1841 1842 1843 1844

    trace_qmp_block_job_cancel(job);
    block_job_cancel(job);
}
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Stefan Hajnoczi 已提交
1845

1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871
void qmp_block_job_pause(const char *device, Error **errp)
{
    BlockJob *job = find_block_job(device);

    if (!job) {
        error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
        return;
    }

    trace_qmp_block_job_pause(job);
    block_job_pause(job);
}

void qmp_block_job_resume(const char *device, Error **errp)
{
    BlockJob *job = find_block_job(device);

    if (!job) {
        error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
        return;
    }

    trace_qmp_block_job_resume(job);
    block_job_resume(job);
}

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Paolo Bonzini 已提交
1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884
void qmp_block_job_complete(const char *device, Error **errp)
{
    BlockJob *job = find_block_job(device);

    if (!job) {
        error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
        return;
    }

    trace_qmp_block_job_complete(job);
    block_job_complete(job, errp);
}

S
Stefan Hajnoczi 已提交
1885 1886 1887 1888 1889 1890
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
{
    BlockJobInfoList **prev = opaque;
    BlockJob *job = bs->job;

    if (job) {
P
Paolo Bonzini 已提交
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        BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
        elem->value = block_job_query(bs->job);
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Stefan Hajnoczi 已提交
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        (*prev)->next = elem;
        *prev = elem;
    }
}

BlockJobInfoList *qmp_query_block_jobs(Error **errp)
{
    /* Dummy is a fake list element for holding the head pointer */
    BlockJobInfoList dummy = {};
    BlockJobInfoList *prev = &dummy;
    bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
    return dummy.next;
}
1906

1907
QemuOptsList qemu_common_drive_opts = {
1908
    .name = "drive",
1909
    .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954
    .desc = {
        {
            .name = "bus",
            .type = QEMU_OPT_NUMBER,
            .help = "bus number",
        },{
            .name = "unit",
            .type = QEMU_OPT_NUMBER,
            .help = "unit number (i.e. lun for scsi)",
        },{
            .name = "if",
            .type = QEMU_OPT_STRING,
            .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
        },{
            .name = "index",
            .type = QEMU_OPT_NUMBER,
            .help = "index number",
        },{
            .name = "cyls",
            .type = QEMU_OPT_NUMBER,
            .help = "number of cylinders (ide disk geometry)",
        },{
            .name = "heads",
            .type = QEMU_OPT_NUMBER,
            .help = "number of heads (ide disk geometry)",
        },{
            .name = "secs",
            .type = QEMU_OPT_NUMBER,
            .help = "number of sectors (ide disk geometry)",
        },{
            .name = "trans",
            .type = QEMU_OPT_STRING,
            .help = "chs translation (auto, lba. none)",
        },{
            .name = "media",
            .type = QEMU_OPT_STRING,
            .help = "media type (disk, cdrom)",
        },{
            .name = "snapshot",
            .type = QEMU_OPT_BOOL,
            .help = "enable/disable snapshot mode",
        },{
            .name = "file",
            .type = QEMU_OPT_STRING,
            .help = "disk image",
1955 1956 1957 1958
        },{
            .name = "discard",
            .type = QEMU_OPT_STRING,
            .help = "discard operation (ignore/off, unmap/on)",
1959
        },{
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1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970
            .name = "cache.writeback",
            .type = QEMU_OPT_BOOL,
            .help = "enables writeback mode for any caches",
        },{
            .name = "cache.direct",
            .type = QEMU_OPT_BOOL,
            .help = "enables use of O_DIRECT (bypass the host page cache)",
        },{
            .name = "cache.no-flush",
            .type = QEMU_OPT_BOOL,
            .help = "ignore any flush requests for the device",
1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995
        },{
            .name = "aio",
            .type = QEMU_OPT_STRING,
            .help = "host AIO implementation (threads, native)",
        },{
            .name = "format",
            .type = QEMU_OPT_STRING,
            .help = "disk format (raw, qcow2, ...)",
        },{
            .name = "serial",
            .type = QEMU_OPT_STRING,
            .help = "disk serial number",
        },{
            .name = "rerror",
            .type = QEMU_OPT_STRING,
            .help = "read error action",
        },{
            .name = "werror",
            .type = QEMU_OPT_STRING,
            .help = "write error action",
        },{
            .name = "addr",
            .type = QEMU_OPT_STRING,
            .help = "pci address (virtio only)",
        },{
1996
            .name = "read-only",
1997 1998 1999
            .type = QEMU_OPT_BOOL,
            .help = "open drive file as read-only",
        },{
2000
            .name = "throttling.iops-total",
2001 2002 2003
            .type = QEMU_OPT_NUMBER,
            .help = "limit total I/O operations per second",
        },{
2004
            .name = "throttling.iops-read",
2005 2006 2007
            .type = QEMU_OPT_NUMBER,
            .help = "limit read operations per second",
        },{
2008
            .name = "throttling.iops-write",
2009 2010 2011
            .type = QEMU_OPT_NUMBER,
            .help = "limit write operations per second",
        },{
2012
            .name = "throttling.bps-total",
2013 2014 2015
            .type = QEMU_OPT_NUMBER,
            .help = "limit total bytes per second",
        },{
2016
            .name = "throttling.bps-read",
2017 2018 2019
            .type = QEMU_OPT_NUMBER,
            .help = "limit read bytes per second",
        },{
2020
            .name = "throttling.bps-write",
2021 2022
            .type = QEMU_OPT_NUMBER,
            .help = "limit write bytes per second",
2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046
        },{
            .name = "throttling.iops-total-max",
            .type = QEMU_OPT_NUMBER,
            .help = "I/O operations burst",
        },{
            .name = "throttling.iops-read-max",
            .type = QEMU_OPT_NUMBER,
            .help = "I/O operations read burst",
        },{
            .name = "throttling.iops-write-max",
            .type = QEMU_OPT_NUMBER,
            .help = "I/O operations write burst",
        },{
            .name = "throttling.bps-total-max",
            .type = QEMU_OPT_NUMBER,
            .help = "total bytes burst",
        },{
            .name = "throttling.bps-read-max",
            .type = QEMU_OPT_NUMBER,
            .help = "total bytes read burst",
        },{
            .name = "throttling.bps-write-max",
            .type = QEMU_OPT_NUMBER,
            .help = "total bytes write burst",
2047 2048 2049 2050
        },{
            .name = "throttling.iops-size",
            .type = QEMU_OPT_NUMBER,
            .help = "when limiting by iops max size of an I/O in bytes",
2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062
        },{
            .name = "copy-on-read",
            .type = QEMU_OPT_BOOL,
            .help = "copy read data from backing file into image file",
        },{
            .name = "boot",
            .type = QEMU_OPT_BOOL,
            .help = "(deprecated, ignored)",
        },
        { /* end of list */ }
    },
};
2063 2064 2065 2066 2067

QemuOptsList qemu_drive_opts = {
    .name = "drive",
    .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
    .desc = {
2068 2069 2070 2071
        /*
         * no elements => accept any params
         * validation will happen later
         */
2072 2073 2074
        { /* end of list */ }
    },
};