Commit 666daa68 authored by Markus Armbruster's avatar Markus Armbruster Committed by Kevin Wolf
Browse files

blockdev: Collect block device code in new blockdev.c 



Anything that moves hundreds of lines out of vl.c can't be all bad.

Signed-off-by: default avatarMarkus Armbruster <armbru@redhat.com>
Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
parent 7b370f51

Makefile.objs

+1 −1
Original line number Diff line number Diff line
@@ -44,7 +44,7 @@ fsdev-obj-$(CONFIG_LINUX) += $(addprefix fsdev/, $(fsdev-nested-y)) 
# system emulation, i.e. a single QEMU executable should support all

# CPUs and machines.



common-obj-y = $(block-obj-y)

common-obj-y = $(block-obj-y) blockdev.o

common-obj-y += $(net-obj-y)

common-obj-y += $(qobject-obj-y)

common-obj-$(CONFIG_LINUX) += $(fsdev-obj-$(CONFIG_LINUX))

blockdev.c

0 → 100644
+600 −0
Original line number Diff line number Diff line 
/*

 * 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"



struct drivelist drives = QTAILQ_HEAD_INITIALIZER(drives);



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_drive_opts, 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;

}



DriveInfo *drive_get_by_id(const char *id)

{

    DriveInfo *dinfo;



    QTAILQ_FOREACH(dinfo, &drives, next) {

        if (strcmp(id, dinfo->id))

            continue;

        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;

}



const char *drive_get_serial(BlockDriverState *bdrv)

{

    DriveInfo *dinfo;



    QTAILQ_FOREACH(dinfo, &drives, next) {

        if (dinfo->bdrv == bdrv)

            return dinfo->serial;

    }



    return "\0";

}



BlockInterfaceErrorAction drive_get_on_error(

    BlockDriverState *bdrv, int is_read)

{

    DriveInfo *dinfo;



    QTAILQ_FOREACH(dinfo, &drives, next) {

        if (dinfo->bdrv == bdrv)

            return is_read ? dinfo->on_read_error : dinfo->on_write_error;

    }



    return is_read ? BLOCK_ERR_REPORT : BLOCK_ERR_STOP_ENOSPC;

}



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->on_read_error = on_read_error;

    dinfo->on_write_error = on_write_error;

    dinfo->opts = opts;

    if (serial)

        strncpy(dinfo->serial, serial, sizeof(serial));

    QTAILQ_INSERT_TAIL(&drives, dinfo, next);



    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_device_opts, 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) {

        *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)

{

    int all_devices;

    DriveInfo *dinfo;

    const char *device = qdict_get_str(qdict, "device");



    all_devices = !strcmp(device, "all");

    QTAILQ_FOREACH(dinfo, &drives, next) {

        if (!all_devices)

            if (strcmp(bdrv_get_device_name(dinfo->bdrv), device))

                continue;

        bdrv_commit(dinfo->bdrv);

    }

}



static int eject_device(Monitor *mon, BlockDriverState *bs, int force)

{

    if (bdrv_is_inserted(bs)) {

        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_int(qdict, "force");

    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_get_type_hint(bs) == BDRV_TYPE_CDROM ? 0 : BDRV_O_RDWR;

    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);

}

blockdev.h

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+71 −0
Original line number Diff line number Diff line 
/*

 * 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.

 */



#ifndef BLOCKDEV_H

#define BLOCKDEV_H



#include "block.h"

#include "qemu-queue.h"



typedef enum {

    IF_NONE,

    IF_IDE, IF_SCSI, IF_FLOPPY, IF_PFLASH, IF_MTD, IF_SD, IF_VIRTIO, IF_XEN,

    IF_COUNT

} BlockInterfaceType;



typedef enum {

    BLOCK_ERR_REPORT, BLOCK_ERR_IGNORE, BLOCK_ERR_STOP_ENOSPC,

    BLOCK_ERR_STOP_ANY

} BlockInterfaceErrorAction;



#define BLOCK_SERIAL_STRLEN 20



typedef struct DriveInfo {

    BlockDriverState *bdrv;

    char *id;

    const char *devaddr;

    BlockInterfaceType type;

    int bus;

    int unit;

    QemuOpts *opts;

    BlockInterfaceErrorAction on_read_error;

    BlockInterfaceErrorAction on_write_error;

    char serial[BLOCK_SERIAL_STRLEN + 1];

    QTAILQ_ENTRY(DriveInfo) next;

} DriveInfo;



#define MAX_IDE_DEVS	2

#define MAX_SCSI_DEVS	7



extern QTAILQ_HEAD(drivelist, DriveInfo) drives;



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

extern DriveInfo *drive_get_by_id(const char *id);

extern int drive_get_max_bus(BlockInterfaceType type);

extern void drive_uninit(DriveInfo *dinfo);

extern const char *drive_get_serial(BlockDriverState *bdrv);



extern BlockInterfaceErrorAction drive_get_on_error(

    BlockDriverState *bdrv, int is_read);



extern QemuOpts *drive_add(const char *file, const char *fmt, ...);

extern DriveInfo *drive_init(QemuOpts *arg, int default_to_scsi,

                             int *fatal_error);



/* device-hotplug */



DriveInfo *add_init_drive(const char *opts);



void do_commit(Monitor *mon, const QDict *qdict);

int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data);

int do_block_set_passwd(Monitor *mon, const QDict *qdict, QObject **ret_data);

int do_change_block(Monitor *mon, const char *device,

                    const char *filename, const char *fmt);



#endif

hw/acpi_piix4.c

+1 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include "pm_smbus.h"

#include "pci.h"

#include "acpi.h"

#include "sysemu.h"



//#define DEBUG

hw/apb_pci.c

+1 −0
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include "pci_host.h"

#include "rwhandler.h"

#include "apb_pci.h"

#include "sysemu.h"



/* debug APB */

//#define DEBUG_APB