[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"

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