[mirror_qemu.git] / blockdev.c

/*
 * 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.
 */

#include "block.h"
#include "blockdev.h"
#include "monitor.h"
#include "qerror.h"
#include "qemu-option.h"
#include "qemu-config.h"
#include "sysemu.h"
#include "hw/qdev.h"
#include "block_int.h"

static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);

/*
 * 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);

    dinfo->auto_del = 1;
}

void blockdev_auto_del(BlockDriverState *bs)
{
    DriveInfo *dinfo = drive_get_by_blockdev(bs);

    if (dinfo->auto_del) {
        drive_uninit(dinfo);
    }
}

QemuOpts *drive_add(const char *file, const char *fmt, ...)
{
    va_list ap;
    char optstr[1024];
    QemuOpts *opts;

    va_start(ap, fmt);
    vsnprintf(optstr, sizeof(optstr), fmt, ap);
    va_end(ap);

    opts = qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
    if (!opts) {
        return NULL;
    }
    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;
}

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;
}

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

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

static void bdrv_format_print(void *opaque, const char *name)
{
    fprintf(stderr, " %s", name);
}

void drive_uninit(DriveInfo *dinfo)
{
    qemu_opts_del(dinfo->opts);
    bdrv_delete(dinfo->bdrv);
    QTAILQ_REMOVE(&drives, dinfo, next);
    qemu_free(dinfo);
}

static int parse_block_error_action(const char *buf, int is_read)
{
    if (!strcmp(buf, "ignore")) {
        return BLOCK_ERR_IGNORE;
    } else if (!is_read && !strcmp(buf, "enospc")) {
        return BLOCK_ERR_STOP_ENOSPC;
    } else if (!strcmp(buf, "stop")) {
        return BLOCK_ERR_STOP_ANY;
    } else if (!strcmp(buf, "report")) {
        return BLOCK_ERR_REPORT;
    } else {
        fprintf(stderr, "qemu: '%s' invalid %s error action\n",
            buf, is_read ? "read" : "write");
        return -1;
    }
}

DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
{
    const char *buf;
    const char *file = NULL;
    char devname[128];
    const char *serial;
    const char *mediastr = "";
    BlockInterfaceType type;
    enum { MEDIA_DISK, MEDIA_CDROM } media;
    int bus_id, unit_id;
    int cyls, heads, secs, translation;
    BlockDriver *drv = NULL;
    int max_devs;
    int index;
    int ro = 0;
    int bdrv_flags = 0;
    int on_read_error, on_write_error;
    const char *devaddr;
    DriveInfo *dinfo;
    int snapshot = 0;
    int ret;

    *fatal_error = 1;

    translation = BIOS_ATA_TRANSLATION_AUTO;

    if (default_to_scsi) {
        type = IF_SCSI;
        max_devs = MAX_SCSI_DEVS;
        pstrcpy(devname, sizeof(devname), "scsi");
    } else {
        type = IF_IDE;
        max_devs = MAX_IDE_DEVS;
        pstrcpy(devname, sizeof(devname), "ide");
    }
    media = MEDIA_DISK;

    /* 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);
    ro = qemu_opt_get_bool(opts, "readonly", 0);

    file = qemu_opt_get(opts, "file");
    serial = qemu_opt_get(opts, "serial");

    if ((buf = qemu_opt_get(opts, "if")) != NULL) {
        pstrcpy(devname, sizeof(devname), buf);
        if (!strcmp(buf, "ide")) {
	    type = IF_IDE;
            max_devs = MAX_IDE_DEVS;
        } else if (!strcmp(buf, "scsi")) {
	    type = IF_SCSI;
            max_devs = MAX_SCSI_DEVS;
        } else if (!strcmp(buf, "floppy")) {
	    type = IF_FLOPPY;
            max_devs = 0;
        } else if (!strcmp(buf, "pflash")) {
	    type = IF_PFLASH;
            max_devs = 0;
	} else if (!strcmp(buf, "mtd")) {
	    type = IF_MTD;
            max_devs = 0;
	} else if (!strcmp(buf, "sd")) {
	    type = IF_SD;
            max_devs = 0;
        } else if (!strcmp(buf, "virtio")) {
            type = IF_VIRTIO;
            max_devs = 0;
	} else if (!strcmp(buf, "xen")) {
	    type = IF_XEN;
            max_devs = 0;
	} else if (!strcmp(buf, "none")) {
	    type = IF_NONE;
            max_devs = 0;
	} else {
            fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf);
            return NULL;
	}
    }

    if (cyls || heads || secs) {
        if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
            fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
	    return NULL;
	}
        if (heads < 1 || (type == IF_IDE && heads > 16)) {
            fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
	    return NULL;
	}
        if (secs < 1 || (type == IF_IDE && secs > 63)) {
            fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
	    return NULL;
	}
    }

    if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
        if (!cyls) {
            fprintf(stderr,
                    "qemu: '%s' trans must be used with cyls,heads and secs\n",
                    buf);
            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 {
            fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
	    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) {
                fprintf(stderr,
                        "qemu: '%s' invalid physical CHS format\n", buf);
	        return NULL;
            }
	    media = MEDIA_CDROM;
	} else {
	    fprintf(stderr, "qemu: '%s' invalid media\n", buf);
	    return NULL;
	}
    }

    if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
        if (!strcmp(buf, "off") || !strcmp(buf, "none")) {
            bdrv_flags |= BDRV_O_NOCACHE;
        } else if (!strcmp(buf, "writeback")) {
            bdrv_flags |= BDRV_O_CACHE_WB;
        } else if (!strcmp(buf, "unsafe")) {
            bdrv_flags |= BDRV_O_CACHE_WB;
            bdrv_flags |= BDRV_O_NO_FLUSH;
        } else if (!strcmp(buf, "writethrough")) {
            /* this is the default */
        } else {
           fprintf(stderr, "qemu: invalid cache option\n");
           return NULL;
        }
    }

#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 {
           fprintf(stderr, "qemu: invalid aio option\n");
           return NULL;
        }
    }
#endif

    if ((buf = qemu_opt_get(opts, "format")) != NULL) {
       if (strcmp(buf, "?") == 0) {
            fprintf(stderr, "qemu: Supported formats:");
            bdrv_iterate_format(bdrv_format_print, NULL);
            fprintf(stderr, "\n");
	    return NULL;
        }
        drv = bdrv_find_whitelisted_format(buf);
        if (!drv) {
            fprintf(stderr, "qemu: '%s' invalid format\n", buf);
            return NULL;
        }
    }

    on_write_error = BLOCK_ERR_STOP_ENOSPC;
    if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
        if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
            fprintf(stderr, "werror is not supported by this format\n");
            return NULL;
        }

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

    on_read_error = BLOCK_ERR_REPORT;
    if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
        if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
            fprintf(stderr, "rerror is not supported by this format\n");
            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) {
            fprintf(stderr, "addr is not supported\n");
            return NULL;
        }
    }

    /* compute bus and unit according index */

    if (index != -1) {
        if (bus_id != 0 || unit_id != -1) {
            fprintf(stderr,
                    "qemu: index cannot be used with bus and unit\n");
            return NULL;
        }
        if (max_devs == 0)
        {
            unit_id = index;
            bus_id = 0;
        } else {
            unit_id = index % max_devs;
            bus_id = index / max_devs;
        }
    }

    /* 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) {
        fprintf(stderr, "qemu: unit %d too big (max is %d)\n",
                unit_id, max_devs - 1);
        return NULL;
    }

    /*
     * ignore multiple definitions
     */

    if (drive_get(type, bus_id, unit_id) != NULL) {
        *fatal_error = 0;
        return NULL;
    }

    /* init */

    dinfo = qemu_mallocz(sizeof(*dinfo));
    if ((buf = qemu_opts_id(opts)) != NULL) {
        dinfo->id = qemu_strdup(buf);
    } else {
        /* no id supplied -> create one */
        dinfo->id = qemu_mallocz(32);
        if (type == IF_IDE || type == IF_SCSI)
            mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
        if (max_devs)
            snprintf(dinfo->id, 32, "%s%i%s%i",
                     devname, bus_id, mediastr, unit_id);
        else
            snprintf(dinfo->id, 32, "%s%s%i",
                     devname, mediastr, unit_id);
    }
    dinfo->bdrv = bdrv_new(dinfo->id);
    dinfo->devaddr = devaddr;
    dinfo->type = type;
    dinfo->bus = bus_id;
    dinfo->unit = unit_id;
    dinfo->opts = opts;
    if (serial)
        strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
    QTAILQ_INSERT_TAIL(&drives, dinfo, next);

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

    switch(type) {
    case IF_IDE:
    case IF_SCSI:
    case IF_XEN:
    case IF_NONE:
        switch(media) {
	case MEDIA_DISK:
            if (cyls != 0) {
                bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
                bdrv_set_translation_hint(dinfo->bdrv, translation);
            }
	    break;
	case MEDIA_CDROM:
            bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
	    break;
	}
        break;
    case IF_SD:
        /* FIXME: This isn't really a floppy, but it's a reasonable
           approximation.  */
    case IF_FLOPPY:
        bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY);
        break;
    case IF_PFLASH:
    case IF_MTD:
        break;
    case IF_VIRTIO:
        /* add virtio block device */
        opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
        qemu_opt_set(opts, "driver", "virtio-blk-pci");
        qemu_opt_set(opts, "drive", dinfo->id);
        if (devaddr)
            qemu_opt_set(opts, "addr", devaddr);
        break;
    case IF_COUNT:
        abort();
    }
    if (!file || !*file) {
        *fatal_error = 0;
        return NULL;
    }
    if (snapshot) {
        /* always use cache=unsafe with snapshot */
        bdrv_flags &= ~BDRV_O_CACHE_MASK;
        bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
    }

    if (media == MEDIA_CDROM) {
        /* CDROM is fine for any interface, don't check.  */
        ro = 1;
    } else if (ro == 1) {
        if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
            fprintf(stderr, "qemu: readonly flag not supported for drive with this interface\n");
            return NULL;
        }
    }

    bdrv_flags |= ro ? 0 : BDRV_O_RDWR;

    ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
    if (ret < 0) {
        fprintf(stderr, "qemu: could not open disk image %s: %s\n",
                        file, strerror(-ret));
        return NULL;
    }

    if (bdrv_key_required(dinfo->bdrv))
        autostart = 0;
    *fatal_error = 0;
    return dinfo;
}

void do_commit(Monitor *mon, const QDict *qdict)
{
    const char *device = qdict_get_str(qdict, "device");
    BlockDriverState *bs;

    if (!strcmp(device, "all")) {
        bdrv_commit_all();
    } else {
        bs = bdrv_find(device);
        if (!bs) {
            qerror_report(QERR_DEVICE_NOT_FOUND, device);
            return;
        }
        bdrv_commit(bs);
    }
}

static int eject_device(Monitor *mon, BlockDriverState *bs, int force)
{
    if (!force) {
        if (!bdrv_is_removable(bs)) {
            qerror_report(QERR_DEVICE_NOT_REMOVABLE,
                           bdrv_get_device_name(bs));
            return -1;
        }
        if (bdrv_is_locked(bs)) {
            qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
            return -1;
        }
    }
    bdrv_close(bs);
    return 0;
}

int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
    BlockDriverState *bs;
    int force = qdict_get_try_bool(qdict, "force", 0);
    const char *filename = qdict_get_str(qdict, "device");

    bs = bdrv_find(filename);
    if (!bs) {
        qerror_report(QERR_DEVICE_NOT_FOUND, filename);
        return -1;
    }
    return eject_device(mon, bs, force);
}

int do_block_set_passwd(Monitor *mon, const QDict *qdict,
                        QObject **ret_data)
{
    BlockDriverState *bs;
    int err;

    bs = bdrv_find(qdict_get_str(qdict, "device"));
    if (!bs) {
        qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
        return -1;
    }

    err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
    if (err == -EINVAL) {
        qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
        return -1;
    } else if (err < 0) {
        qerror_report(QERR_INVALID_PASSWORD);
        return -1;
    }

    return 0;
}

int do_change_block(Monitor *mon, const char *device,
                    const char *filename, const char *fmt)
{
    BlockDriverState *bs;
    BlockDriver *drv = NULL;
    int bdrv_flags;

    bs = bdrv_find(device);
    if (!bs) {
        qerror_report(QERR_DEVICE_NOT_FOUND, device);
        return -1;
    }
    if (fmt) {
        drv = bdrv_find_whitelisted_format(fmt);
        if (!drv) {
            qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt);
            return -1;
        }
    }
    if (eject_device(mon, bs, 0) < 0) {
        return -1;
    }
    bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
    bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
    if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
        qerror_report(QERR_OPEN_FILE_FAILED, filename);
        return -1;
    }
    return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);
}

int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
    const char *id = qdict_get_str(qdict, "id");
    BlockDriverState *bs;
    BlockDriverState **ptr;
    Property *prop;

    bs = bdrv_find(id);
    if (!bs) {
        qerror_report(QERR_DEVICE_NOT_FOUND, id);
        return -1;
    }

    /* quiesce block driver; prevent further io */
    qemu_aio_flush();
    bdrv_flush(bs);
    bdrv_close(bs);

    /* clean up guest state from pointing to host resource by
     * finding and removing DeviceState "drive" property */
    for (prop = bs->peer->info->props; prop && prop->name; prop++) {
        if (prop->info->type == PROP_TYPE_DRIVE) {
            ptr = qdev_get_prop_ptr(bs->peer, prop);
            if ((*ptr) == bs) {
                bdrv_detach(bs, bs->peer);
                *ptr = NULL;
                break;
            }
        }
    }

    /* clean up host side */
    drive_uninit(drive_get_by_blockdev(bs));

    return 0;
}
Commit	Line	Data
666daa68 MA	1	/*
	2	* QEMU host block devices
	3	*
	4	* Copyright (c) 2003-2008 Fabrice Bellard
	5	*
	6	* This work is licensed under the terms of the GNU GPL, version 2 or
	7	* later. See the COPYING file in the top-level directory.
	8	*/
	9
	10	#include "block.h"
	11	#include "blockdev.h"
	12	#include "monitor.h"
	13	#include "qerror.h"
	14	#include "qemu-option.h"
	15	#include "qemu-config.h"
	16	#include "sysemu.h"
9063f814 RH	17	#include "hw/qdev.h"
9063f814 RH	18	#include "block_int.h"
666daa68	19
c9b62a7e	20	static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
666daa68	21
14bafc54 MA	22	/*
	23	* We automatically delete the drive when a device using it gets
	24	* unplugged. Questionable feature, but we can't just drop it.
	25	* Device models call blockdev_mark_auto_del() to schedule the
	26	* automatic deletion, and generic qdev code calls blockdev_auto_del()
	27	* when deletion is actually safe.
	28	*/
	29	void blockdev_mark_auto_del(BlockDriverState *bs)
	30	{
	31	DriveInfo *dinfo = drive_get_by_blockdev(bs);
	32
	33	dinfo->auto_del = 1;
	34	}
	35
	36	void blockdev_auto_del(BlockDriverState *bs)
	37	{
	38	DriveInfo *dinfo = drive_get_by_blockdev(bs);
	39
	40	if (dinfo->auto_del) {
	41	drive_uninit(dinfo);
	42	}
	43	}
	44
666daa68 MA	45	QemuOpts drive_add(const char file, const char *fmt, ...)
	46	{
	47	va_list ap;
	48	char optstr[1024];
	49	QemuOpts *opts;
	50
	51	va_start(ap, fmt);
	52	vsnprintf(optstr, sizeof(optstr), fmt, ap);
	53	va_end(ap);
	54
3329f07b	55	opts = qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
666daa68 MA	56	if (!opts) {
	57	return NULL;
	58	}
	59	if (file)
	60	qemu_opt_set(opts, "file", file);
	61	return opts;
	62	}
	63
	64	DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
	65	{
	66	DriveInfo *dinfo;
	67
	68	/* seek interface, bus and unit */
	69
	70	QTAILQ_FOREACH(dinfo, &drives, next) {
	71	if (dinfo->type == type &&
	72	dinfo->bus == bus &&
	73	dinfo->unit == unit)
	74	return dinfo;
	75	}
	76
	77	return NULL;
	78	}
	79
666daa68 MA	80	int drive_get_max_bus(BlockInterfaceType type)
	81	{
	82	int max_bus;
	83	DriveInfo *dinfo;
	84
	85	max_bus = -1;
	86	QTAILQ_FOREACH(dinfo, &drives, next) {
	87	if(dinfo->type == type &&
	88	dinfo->bus > max_bus)
	89	max_bus = dinfo->bus;
	90	}
	91	return max_bus;
	92	}
	93
e4700e59	94	DriveInfo drive_get_by_blockdev(BlockDriverState bs)
666daa68 MA	95	{
	96	DriveInfo *dinfo;
	97
	98	QTAILQ_FOREACH(dinfo, &drives, next) {
e4700e59 MA	99	if (dinfo->bdrv == bs) {
	100	return dinfo;
	101	}
666daa68	102	}
e4700e59	103	return NULL;
666daa68 MA	104	}
666daa68 MA	105
666daa68 MA	106	static void bdrv_format_print(void opaque, const char name)
	107	{
	108	fprintf(stderr, " %s", name);
	109	}
	110
	111	void drive_uninit(DriveInfo *dinfo)
	112	{
	113	qemu_opts_del(dinfo->opts);
	114	bdrv_delete(dinfo->bdrv);
	115	QTAILQ_REMOVE(&drives, dinfo, next);
	116	qemu_free(dinfo);
	117	}
	118
	119	static int parse_block_error_action(const char *buf, int is_read)
	120	{
	121	if (!strcmp(buf, "ignore")) {
	122	return BLOCK_ERR_IGNORE;
	123	} else if (!is_read && !strcmp(buf, "enospc")) {
	124	return BLOCK_ERR_STOP_ENOSPC;
	125	} else if (!strcmp(buf, "stop")) {
	126	return BLOCK_ERR_STOP_ANY;
	127	} else if (!strcmp(buf, "report")) {
	128	return BLOCK_ERR_REPORT;
	129	} else {
	130	fprintf(stderr, "qemu: '%s' invalid %s error action\n",
	131	buf, is_read ? "read" : "write");
	132	return -1;
	133	}
	134	}
	135
	136	DriveInfo drive_init(QemuOpts opts, int default_to_scsi, int *fatal_error)
	137	{
	138	const char *buf;
	139	const char *file = NULL;
	140	char devname[128];
	141	const char *serial;
	142	const char *mediastr = "";
	143	BlockInterfaceType type;
	144	enum { MEDIA_DISK, MEDIA_CDROM } media;
	145	int bus_id, unit_id;
	146	int cyls, heads, secs, translation;
	147	BlockDriver *drv = NULL;
	148	int max_devs;
	149	int index;
	150	int ro = 0;
	151	int bdrv_flags = 0;
	152	int on_read_error, on_write_error;
	153	const char *devaddr;
	154	DriveInfo *dinfo;
	155	int snapshot = 0;
	156	int ret;
	157
	158	*fatal_error = 1;
	159
	160	translation = BIOS_ATA_TRANSLATION_AUTO;
	161
	162	if (default_to_scsi) {
	163	type = IF_SCSI;
	164	max_devs = MAX_SCSI_DEVS;
	165	pstrcpy(devname, sizeof(devname), "scsi");
	166	} else {
	167	type = IF_IDE;
	168	max_devs = MAX_IDE_DEVS;
	169	pstrcpy(devname, sizeof(devname), "ide");
170	}
171	media = MEDIA_DISK;
172
173	/* extract parameters */
174	bus_id = qemu_opt_get_number(opts, "bus", 0);
175	unit_id = qemu_opt_get_number(opts, "unit", -1);
176	index = qemu_opt_get_number(opts, "index", -1);
177
178	cyls = qemu_opt_get_number(opts, "cyls", 0);
179	heads = qemu_opt_get_number(opts, "heads", 0);
180	secs = qemu_opt_get_number(opts, "secs", 0);
181
182	snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
183	ro = qemu_opt_get_bool(opts, "readonly", 0);
184
185	file = qemu_opt_get(opts, "file");
186	serial = qemu_opt_get(opts, "serial");
187
188	if ((buf = qemu_opt_get(opts, "if")) != NULL) {
189	pstrcpy(devname, sizeof(devname), buf);
190	if (!strcmp(buf, "ide")) {
191	type = IF_IDE;
192	max_devs = MAX_IDE_DEVS;
193	} else if (!strcmp(buf, "scsi")) {
194	type = IF_SCSI;
195	max_devs = MAX_SCSI_DEVS;
196	} else if (!strcmp(buf, "floppy")) {
197	type = IF_FLOPPY;
198	max_devs = 0;
199	} else if (!strcmp(buf, "pflash")) {
200	type = IF_PFLASH;
201	max_devs = 0;
202	} else if (!strcmp(buf, "mtd")) {
203	type = IF_MTD;
204	max_devs = 0;
205	} else if (!strcmp(buf, "sd")) {
206	type = IF_SD;
207	max_devs = 0;
208	} else if (!strcmp(buf, "virtio")) {
209	type = IF_VIRTIO;
210	max_devs = 0;
211	} else if (!strcmp(buf, "xen")) {
212	type = IF_XEN;
213	max_devs = 0;
214	} else if (!strcmp(buf, "none")) {
215	type = IF_NONE;
216	max_devs = 0;
217	} else {
218	fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf);
219	return NULL;
220	}
221	}
222
223	if (cyls \|\| heads \|\| secs) {
224	if (cyls < 1 \|\| (type == IF_IDE && cyls > 16383)) {
225	fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
226	return NULL;
227	}
228	if (heads < 1 \|\| (type == IF_IDE && heads > 16)) {
229	fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
230	return NULL;
231	}
232	if (secs < 1 \|\| (type == IF_IDE && secs > 63)) {
233	fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
234	return NULL;
235	}
236	}
237
238	if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
239	if (!cyls) {
240	fprintf(stderr,
241	"qemu: '%s' trans must be used with cyls,heads and secs\n",
242	buf);
243	return NULL;
244	}
245	if (!strcmp(buf, "none"))
246	translation = BIOS_ATA_TRANSLATION_NONE;
247	else if (!strcmp(buf, "lba"))
248	translation = BIOS_ATA_TRANSLATION_LBA;
249	else if (!strcmp(buf, "auto"))
250	translation = BIOS_ATA_TRANSLATION_AUTO;
251	else {
252	fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
253	return NULL;
254	}
255	}
256
257	if ((buf = qemu_opt_get(opts, "media")) != NULL) {
258	if (!strcmp(buf, "disk")) {
259	media = MEDIA_DISK;
260	} else if (!strcmp(buf, "cdrom")) {
261	if (cyls \|\| secs \|\| heads) {
262	fprintf(stderr,
263	"qemu: '%s' invalid physical CHS format\n", buf);
264	return NULL;
265	}
266	media = MEDIA_CDROM;
267	} else {
268	fprintf(stderr, "qemu: '%s' invalid media\n", buf);
269	return NULL;
270	}
271	}
272
273	if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
274	if (!strcmp(buf, "off") \|\| !strcmp(buf, "none")) {
275	bdrv_flags \|= BDRV_O_NOCACHE;
276	} else if (!strcmp(buf, "writeback")) {
277	bdrv_flags \|= BDRV_O_CACHE_WB;
278	} else if (!strcmp(buf, "unsafe")) {
279	bdrv_flags \|= BDRV_O_CACHE_WB;
280	bdrv_flags \|= BDRV_O_NO_FLUSH;
281	} else if (!strcmp(buf, "writethrough")) {
282	/* this is the default */
283	} else {
284	fprintf(stderr, "qemu: invalid cache option\n");
285	return NULL;
286	}
287	}
288
289	#ifdef CONFIG_LINUX_AIO
290	if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
291	if (!strcmp(buf, "native")) {
292	bdrv_flags \|= BDRV_O_NATIVE_AIO;
293	} else if (!strcmp(buf, "threads")) {
294	/* this is the default */
295	} else {
296	fprintf(stderr, "qemu: invalid aio option\n");
297	return NULL;
298	}
299	}
300	#endif
301
302	if ((buf = qemu_opt_get(opts, "format")) != NULL) {
303	if (strcmp(buf, "?") == 0) {
304	fprintf(stderr, "qemu: Supported formats:");
305	bdrv_iterate_format(bdrv_format_print, NULL);
306	fprintf(stderr, "\n");
307	return NULL;
308	}
309	drv = bdrv_find_whitelisted_format(buf);
310	if (!drv) {
311	fprintf(stderr, "qemu: '%s' invalid format\n", buf);
312	return NULL;
313	}
314	}
315
316	on_write_error = BLOCK_ERR_STOP_ENOSPC;
317	if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
318	if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
5dba48a8	319	fprintf(stderr, "werror is not supported by this format\n");
666daa68 MA	320	return NULL;
	321	}
	322
	323	on_write_error = parse_block_error_action(buf, 0);
	324	if (on_write_error < 0) {
	325	return NULL;
	326	}
	327	}
	328
	329	on_read_error = BLOCK_ERR_REPORT;
	330	if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
5dba48a8 KW	331	if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
5dba48a8 KW	332	fprintf(stderr, "rerror is not supported by this format\n");
666daa68 MA	333	return NULL;
	334	}
	335
	336	on_read_error = parse_block_error_action(buf, 1);
	337	if (on_read_error < 0) {
	338	return NULL;
	339	}
	340	}
	341
	342	if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
	343	if (type != IF_VIRTIO) {
	344	fprintf(stderr, "addr is not supported\n");
	345	return NULL;
	346	}
	347	}
	348
	349	/* compute bus and unit according index */
	350
	351	if (index != -1) {
	352	if (bus_id != 0 \|\| unit_id != -1) {
	353	fprintf(stderr,
	354	"qemu: index cannot be used with bus and unit\n");
	355	return NULL;
	356	}
	357	if (max_devs == 0)
	358	{
	359	unit_id = index;
	360	bus_id = 0;
	361	} else {
	362	unit_id = index % max_devs;
	363	bus_id = index / max_devs;
	364	}
	365	}
	366
	367	/* if user doesn't specify a unit_id,
	368	* try to find the first free
	369	*/
	370
	371	if (unit_id == -1) {
	372	unit_id = 0;
	373	while (drive_get(type, bus_id, unit_id) != NULL) {
	374	unit_id++;
	375	if (max_devs && unit_id >= max_devs) {
	376	unit_id -= max_devs;
	377	bus_id++;
	378	}
	379	}
	380	}
	381
	382	/* check unit id */
	383
	384	if (max_devs && unit_id >= max_devs) {
	385	fprintf(stderr, "qemu: unit %d too big (max is %d)\n",
	386	unit_id, max_devs - 1);
	387	return NULL;
	388	}
	389
	390	/*
	391	* ignore multiple definitions
	392	*/
	393
	394	if (drive_get(type, bus_id, unit_id) != NULL) {
	395	*fatal_error = 0;
	396	return NULL;
397	}
398
399	/* init */
400
401	dinfo = qemu_mallocz(sizeof(*dinfo));
402	if ((buf = qemu_opts_id(opts)) != NULL) {
403	dinfo->id = qemu_strdup(buf);
404	} else {
405	/* no id supplied -> create one */
406	dinfo->id = qemu_mallocz(32);
407	if (type == IF_IDE \|\| type == IF_SCSI)
408	mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
409	if (max_devs)
410	snprintf(dinfo->id, 32, "%s%i%s%i",
411	devname, bus_id, mediastr, unit_id);
412	else
413	snprintf(dinfo->id, 32, "%s%s%i",
414	devname, mediastr, unit_id);
415	}
416	dinfo->bdrv = bdrv_new(dinfo->id);
417	dinfo->devaddr = devaddr;
418	dinfo->type = type;
419	dinfo->bus = bus_id;
420	dinfo->unit = unit_id;
666daa68 MA	421	dinfo->opts = opts;
666daa68 MA	422	if (serial)
653dbec7	423	strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
666daa68 MA	424	QTAILQ_INSERT_TAIL(&drives, dinfo, next);
666daa68 MA	425
abd7f68d MA	426	bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
abd7f68d MA	427
666daa68 MA	428	switch(type) {
	429	case IF_IDE:
	430	case IF_SCSI:
	431	case IF_XEN:
	432	case IF_NONE:
	433	switch(media) {
	434	case MEDIA_DISK:
	435	if (cyls != 0) {
	436	bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
	437	bdrv_set_translation_hint(dinfo->bdrv, translation);
	438	}
	439	break;
	440	case MEDIA_CDROM:
	441	bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
	442	break;
	443	}
	444	break;
	445	case IF_SD:
	446	/* FIXME: This isn't really a floppy, but it's a reasonable
	447	approximation. */
	448	case IF_FLOPPY:
	449	bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY);
	450	break;
	451	case IF_PFLASH:
	452	case IF_MTD:
	453	break;
	454	case IF_VIRTIO:
	455	/* add virtio block device */
3329f07b	456	opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
666daa68 MA	457	qemu_opt_set(opts, "driver", "virtio-blk-pci");
	458	qemu_opt_set(opts, "drive", dinfo->id);
	459	if (devaddr)
	460	qemu_opt_set(opts, "addr", devaddr);
	461	break;
	462	case IF_COUNT:
	463	abort();
	464	}
dd5b0d71	465	if (!file \|\| !*file) {
666daa68 MA	466	*fatal_error = 0;
	467	return NULL;
	468	}
	469	if (snapshot) {
	470	/* always use cache=unsafe with snapshot */
	471	bdrv_flags &= ~BDRV_O_CACHE_MASK;
	472	bdrv_flags \|= (BDRV_O_SNAPSHOT\|BDRV_O_CACHE_WB\|BDRV_O_NO_FLUSH);
	473	}
	474
	475	if (media == MEDIA_CDROM) {
	476	/* CDROM is fine for any interface, don't check. */
	477	ro = 1;
	478	} else if (ro == 1) {
	479	if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
	480	fprintf(stderr, "qemu: readonly flag not supported for drive with this interface\n");
	481	return NULL;
	482	}
	483	}
	484
	485	bdrv_flags \|= ro ? 0 : BDRV_O_RDWR;
	486
	487	ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
	488	if (ret < 0) {
	489	fprintf(stderr, "qemu: could not open disk image %s: %s\n",
	490	file, strerror(-ret));
	491	return NULL;
	492	}
	493
	494	if (bdrv_key_required(dinfo->bdrv))
	495	autostart = 0;
	496	*fatal_error = 0;
	497	return dinfo;
	498	}
	499
	500	void do_commit(Monitor mon, const QDict qdict)
	501	{
666daa68	502	const char *device = qdict_get_str(qdict, "device");
6ab4b5ab	503	BlockDriverState *bs;
666daa68	504
6ab4b5ab MA	505	if (!strcmp(device, "all")) {
	506	bdrv_commit_all();
	507	} else {
	508	bs = bdrv_find(device);
ac59eb95 MA	509	if (!bs) {
	510	qerror_report(QERR_DEVICE_NOT_FOUND, device);
	511	return;
6ab4b5ab	512	}
ac59eb95	513	bdrv_commit(bs);
666daa68 MA	514	}
	515	}
	516
	517	static int eject_device(Monitor mon, BlockDriverState bs, int force)
	518	{
3b5276b5 EH	519	if (!force) {
	520	if (!bdrv_is_removable(bs)) {
	521	qerror_report(QERR_DEVICE_NOT_REMOVABLE,
	522	bdrv_get_device_name(bs));
	523	return -1;
	524	}
	525	if (bdrv_is_locked(bs)) {
	526	qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
	527	return -1;
666daa68	528	}
666daa68	529	}
3b5276b5	530	bdrv_close(bs);
666daa68 MA	531	return 0;
	532	}
	533
	534	int do_eject(Monitor mon, const QDict qdict, QObject **ret_data)
	535	{
	536	BlockDriverState *bs;
eb159d13	537	int force = qdict_get_try_bool(qdict, "force", 0);
666daa68 MA	538	const char *filename = qdict_get_str(qdict, "device");
	539
	540	bs = bdrv_find(filename);
	541	if (!bs) {
	542	qerror_report(QERR_DEVICE_NOT_FOUND, filename);
	543	return -1;
	544	}
	545	return eject_device(mon, bs, force);
	546	}
	547
	548	int do_block_set_passwd(Monitor mon, const QDict qdict,
	549	QObject **ret_data)
	550	{
	551	BlockDriverState *bs;
	552	int err;
	553
	554	bs = bdrv_find(qdict_get_str(qdict, "device"));
	555	if (!bs) {
	556	qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
	557	return -1;
	558	}
	559
	560	err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
	561	if (err == -EINVAL) {
	562	qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
	563	return -1;
	564	} else if (err < 0) {
	565	qerror_report(QERR_INVALID_PASSWORD);
	566	return -1;
	567	}
	568
	569	return 0;
	570	}
	571
	572	int do_change_block(Monitor mon, const char device,
	573	const char filename, const char fmt)
	574	{
	575	BlockDriverState *bs;
	576	BlockDriver *drv = NULL;
	577	int bdrv_flags;
	578
	579	bs = bdrv_find(device);
	580	if (!bs) {
	581	qerror_report(QERR_DEVICE_NOT_FOUND, device);
	582	return -1;
	583	}
	584	if (fmt) {
	585	drv = bdrv_find_whitelisted_format(fmt);
	586	if (!drv) {
	587	qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt);
	588	return -1;
	589	}
	590	}
	591	if (eject_device(mon, bs, 0) < 0) {
	592	return -1;
	593	}
528f7663	594	bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
199630b6	595	bdrv_flags \|= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
666daa68 MA	596	if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
	597	qerror_report(QERR_OPEN_FILE_FAILED, filename);
	598	return -1;
	599	}
	600	return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);
	601	}
9063f814 RH	602
	603	int do_drive_del(Monitor mon, const QDict qdict, QObject **ret_data)
	604	{
	605	const char *id = qdict_get_str(qdict, "id");
	606	BlockDriverState *bs;
	607	BlockDriverState **ptr;
	608	Property *prop;
	609
	610	bs = bdrv_find(id);
	611	if (!bs) {
	612	qerror_report(QERR_DEVICE_NOT_FOUND, id);
	613	return -1;
	614	}
	615
	616	/* quiesce block driver; prevent further io */
	617	qemu_aio_flush();
	618	bdrv_flush(bs);
	619	bdrv_close(bs);
	620
	621	/* clean up guest state from pointing to host resource by
	622	* finding and removing DeviceState "drive" property */
	623	for (prop = bs->peer->info->props; prop && prop->name; prop++) {
	624	if (prop->info->type == PROP_TYPE_DRIVE) {
	625	ptr = qdev_get_prop_ptr(bs->peer, prop);
	626	if ((*ptr) == bs) {
	627	bdrv_detach(bs, bs->peer);
	628	*ptr = NULL;
	629	break;
	630	}
	631	}
	632	}
	633
	634	/* clean up host side */
	635	drive_uninit(drive_get_by_blockdev(bs));
	636
	637	return 0;
	638	}