| /* |
| * 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); |
| |
| 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"; |
| } |
| |
| 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_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 || !*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_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); |
| } |