| /* |
| * 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 "qemu-objects.h" |
| #include "sysemu.h" |
| #include "block_int.h" |
| #include "qmp-commands.h" |
| #include "trace.h" |
| #include "arch_init.h" |
| |
| static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); |
| |
| static const char *const if_name[IF_COUNT] = { |
| [IF_NONE] = "none", |
| [IF_IDE] = "ide", |
| [IF_SCSI] = "scsi", |
| [IF_FLOPPY] = "floppy", |
| [IF_PFLASH] = "pflash", |
| [IF_MTD] = "mtd", |
| [IF_SD] = "sd", |
| [IF_VIRTIO] = "virtio", |
| [IF_XEN] = "xen", |
| }; |
| |
| static const int if_max_devs[IF_COUNT] = { |
| /* |
| * Do not change these numbers! They govern how drive option |
| * index maps to unit and bus. That mapping is ABI. |
| * |
| * All controllers used to imlement if=T drives need to support |
| * if_max_devs[T] units, for any T with if_max_devs[T] != 0. |
| * Otherwise, some index values map to "impossible" bus, unit |
| * values. |
| * |
| * For instance, if you change [IF_SCSI] to 255, -drive |
| * if=scsi,index=12 no longer means bus=1,unit=5, but |
| * bus=0,unit=12. With an lsi53c895a controller (7 units max), |
| * the drive can't be set up. Regression. |
| */ |
| [IF_IDE] = 2, |
| [IF_SCSI] = 7, |
| }; |
| |
| /* |
| * 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); |
| |
| if (dinfo) { |
| dinfo->auto_del = 1; |
| } |
| } |
| |
| void blockdev_auto_del(BlockDriverState *bs) |
| { |
| DriveInfo *dinfo = drive_get_by_blockdev(bs); |
| |
| if (dinfo && dinfo->auto_del) { |
| drive_put_ref(dinfo); |
| } |
| } |
| |
| static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
| { |
| int max_devs = if_max_devs[type]; |
| return max_devs ? index / max_devs : 0; |
| } |
| |
| static int drive_index_to_unit_id(BlockInterfaceType type, int index) |
| { |
| int max_devs = if_max_devs[type]; |
| return max_devs ? index % max_devs : index; |
| } |
| |
| QemuOpts *drive_def(const char *optstr) |
| { |
| return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); |
| } |
| |
| QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
| const char *optstr) |
| { |
| QemuOpts *opts; |
| char buf[32]; |
| |
| opts = drive_def(optstr); |
| if (!opts) { |
| return NULL; |
| } |
| if (type != IF_DEFAULT) { |
| qemu_opt_set(opts, "if", if_name[type]); |
| } |
| if (index >= 0) { |
| snprintf(buf, sizeof(buf), "%d", index); |
| qemu_opt_set(opts, "index", buf); |
| } |
| 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_index(BlockInterfaceType type, int index) |
| { |
| return drive_get(type, |
| drive_index_to_bus_id(type, index), |
| drive_index_to_unit_id(type, index)); |
| } |
| |
| 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; |
| } |
| |
| /* Get a block device. This should only be used for single-drive devices |
| (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the |
| appropriate bus. */ |
| DriveInfo *drive_get_next(BlockInterfaceType type) |
| { |
| static int next_block_unit[IF_COUNT]; |
| |
| return drive_get(type, 0, next_block_unit[type]++); |
| } |
| |
| 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) |
| { |
| error_printf(" %s", name); |
| } |
| |
| static void drive_uninit(DriveInfo *dinfo) |
| { |
| qemu_opts_del(dinfo->opts); |
| bdrv_delete(dinfo->bdrv); |
| g_free(dinfo->id); |
| QTAILQ_REMOVE(&drives, dinfo, next); |
| g_free(dinfo); |
| } |
| |
| void drive_put_ref(DriveInfo *dinfo) |
| { |
| assert(dinfo->refcount); |
| if (--dinfo->refcount == 0) { |
| drive_uninit(dinfo); |
| } |
| } |
| |
| void drive_get_ref(DriveInfo *dinfo) |
| { |
| dinfo->refcount++; |
| } |
| |
| typedef struct { |
| QEMUBH *bh; |
| DriveInfo *dinfo; |
| } DrivePutRefBH; |
| |
| static void drive_put_ref_bh(void *opaque) |
| { |
| DrivePutRefBH *s = opaque; |
| |
| drive_put_ref(s->dinfo); |
| qemu_bh_delete(s->bh); |
| g_free(s); |
| } |
| |
| /* |
| * Release a drive reference in a BH |
| * |
| * It is not possible to use drive_put_ref() from a callback function when the |
| * callers still need the drive. In such cases we schedule a BH to release the |
| * reference. |
| */ |
| static void drive_put_ref_bh_schedule(DriveInfo *dinfo) |
| { |
| DrivePutRefBH *s; |
| |
| s = g_new(DrivePutRefBH, 1); |
| s->bh = qemu_bh_new(drive_put_ref_bh, s); |
| s->dinfo = dinfo; |
| qemu_bh_schedule(s->bh); |
| } |
| |
| 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 { |
| error_report("'%s' invalid %s error action", |
| buf, is_read ? "read" : "write"); |
| return -1; |
| } |
| } |
| |
| static bool do_check_io_limits(BlockIOLimit *io_limits) |
| { |
| bool bps_flag; |
| bool iops_flag; |
| |
| assert(io_limits); |
| |
| bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0) |
| && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0) |
| || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0)); |
| iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0) |
| && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0) |
| || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0)); |
| if (bps_flag || iops_flag) { |
| return false; |
| } |
| |
| return true; |
| } |
| |
| DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi) |
| { |
| 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; |
| BlockIOLimit io_limits; |
| int snapshot = 0; |
| bool copy_on_read; |
| int ret; |
| |
| translation = BIOS_ATA_TRANSLATION_AUTO; |
| 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); |
| copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
| |
| 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); |
| for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
| ; |
| if (type == IF_COUNT) { |
| error_report("unsupported bus type '%s'", buf); |
| return NULL; |
| } |
| } else { |
| type = default_to_scsi ? IF_SCSI : IF_IDE; |
| pstrcpy(devname, sizeof(devname), if_name[type]); |
| } |
| |
| max_devs = if_max_devs[type]; |
| |
| if (cyls || heads || secs) { |
| if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { |
| error_report("invalid physical cyls number"); |
| return NULL; |
| } |
| if (heads < 1 || (type == IF_IDE && heads > 16)) { |
| error_report("invalid physical heads number"); |
| return NULL; |
| } |
| if (secs < 1 || (type == IF_IDE && secs > 63)) { |
| error_report("invalid physical secs number"); |
| return NULL; |
| } |
| } |
| |
| if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
| if (!cyls) { |
| error_report("'%s' trans must be used with cyls, heads and secs", |
| 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 { |
| error_report("'%s' invalid translation type", 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) { |
| error_report("CHS can't be set with media=%s", buf); |
| return NULL; |
| } |
| media = MEDIA_CDROM; |
| } else { |
| error_report("'%s' invalid media", buf); |
| return NULL; |
| } |
| } |
| |
| if ((buf = qemu_opt_get(opts, "cache")) != NULL) { |
| if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { |
| error_report("invalid cache option"); |
| 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 { |
| error_report("invalid aio option"); |
| return NULL; |
| } |
| } |
| #endif |
| |
| if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
| if (strcmp(buf, "?") == 0) { |
| error_printf("Supported formats:"); |
| bdrv_iterate_format(bdrv_format_print, NULL); |
| error_printf("\n"); |
| return NULL; |
| } |
| drv = bdrv_find_whitelisted_format(buf); |
| if (!drv) { |
| error_report("'%s' invalid format", buf); |
| return NULL; |
| } |
| } |
| |
| /* disk I/O throttling */ |
| io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = |
| qemu_opt_get_number(opts, "bps", 0); |
| io_limits.bps[BLOCK_IO_LIMIT_READ] = |
| qemu_opt_get_number(opts, "bps_rd", 0); |
| io_limits.bps[BLOCK_IO_LIMIT_WRITE] = |
| qemu_opt_get_number(opts, "bps_wr", 0); |
| io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = |
| qemu_opt_get_number(opts, "iops", 0); |
| io_limits.iops[BLOCK_IO_LIMIT_READ] = |
| qemu_opt_get_number(opts, "iops_rd", 0); |
| io_limits.iops[BLOCK_IO_LIMIT_WRITE] = |
| qemu_opt_get_number(opts, "iops_wr", 0); |
| |
| if (!do_check_io_limits(&io_limits)) { |
| error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " |
| "cannot be used at the same time"); |
| 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) { |
| error_report("werror is not supported by this bus type"); |
| 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) { |
| error_report("rerror is not supported by this bus type"); |
| 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) { |
| error_report("addr is not supported by this bus type"); |
| return NULL; |
| } |
| } |
| |
| /* compute bus and unit according index */ |
| |
| if (index != -1) { |
| if (bus_id != 0 || unit_id != -1) { |
| error_report("index cannot be used with bus and unit"); |
| return NULL; |
| } |
| bus_id = drive_index_to_bus_id(type, index); |
| unit_id = drive_index_to_unit_id(type, index); |
| } |
| |
| /* 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) { |
| error_report("unit %d too big (max is %d)", |
| unit_id, max_devs - 1); |
| return NULL; |
| } |
| |
| /* |
| * catch multiple definitions |
| */ |
| |
| if (drive_get(type, bus_id, unit_id) != NULL) { |
| error_report("drive with bus=%d, unit=%d (index=%d) exists", |
| bus_id, unit_id, index); |
| return NULL; |
| } |
| |
| /* init */ |
| |
| dinfo = g_malloc0(sizeof(*dinfo)); |
| if ((buf = qemu_opts_id(opts)) != NULL) { |
| dinfo->id = g_strdup(buf); |
| } else { |
| /* no id supplied -> create one */ |
| dinfo->id = g_malloc0(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; |
| dinfo->refcount = 1; |
| 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); |
| |
| /* disk I/O throttling */ |
| bdrv_set_io_limits(dinfo->bdrv, &io_limits); |
| |
| 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: |
| dinfo->media_cd = 1; |
| break; |
| } |
| break; |
| case IF_SD: |
| case IF_FLOPPY: |
| case IF_PFLASH: |
| case IF_MTD: |
| break; |
| case IF_VIRTIO: |
| /* add virtio block device */ |
| opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); |
| if (arch_type == QEMU_ARCH_S390X) { |
| qemu_opt_set(opts, "driver", "virtio-blk-s390"); |
| } else { |
| qemu_opt_set(opts, "driver", "virtio-blk-pci"); |
| } |
| qemu_opt_set(opts, "drive", dinfo->id); |
| if (devaddr) |
| qemu_opt_set(opts, "addr", devaddr); |
| break; |
| default: |
| abort(); |
| } |
| if (!file || !*file) { |
| return dinfo; |
| } |
| 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 (copy_on_read) { |
| bdrv_flags |= BDRV_O_COPY_ON_READ; |
| } |
| |
| 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 && type != IF_PFLASH) { |
| error_report("readonly not supported by this bus type"); |
| goto err; |
| } |
| } |
| |
| bdrv_flags |= ro ? 0 : BDRV_O_RDWR; |
| |
| ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); |
| if (ret < 0) { |
| error_report("could not open disk image %s: %s", |
| file, strerror(-ret)); |
| goto err; |
| } |
| |
| if (bdrv_key_required(dinfo->bdrv)) |
| autostart = 0; |
| return dinfo; |
| |
| err: |
| bdrv_delete(dinfo->bdrv); |
| g_free(dinfo->id); |
| QTAILQ_REMOVE(&drives, dinfo, next); |
| g_free(dinfo); |
| return NULL; |
| } |
| |
| 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 { |
| int ret; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| ret = bdrv_commit(bs); |
| if (ret == -EBUSY) { |
| qerror_report(QERR_DEVICE_IN_USE, device); |
| return; |
| } |
| } |
| } |
| |
| void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
| bool has_format, const char *format, |
| Error **errp) |
| { |
| BlockDriverState *bs; |
| BlockDriver *drv, *old_drv, *proto_drv; |
| int ret = 0; |
| int flags; |
| char old_filename[1024]; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| if (bdrv_in_use(bs)) { |
| error_set(errp, QERR_DEVICE_IN_USE, device); |
| return; |
| } |
| |
| pstrcpy(old_filename, sizeof(old_filename), bs->filename); |
| |
| old_drv = bs->drv; |
| flags = bs->open_flags; |
| |
| if (!has_format) { |
| format = "qcow2"; |
| } |
| |
| drv = bdrv_find_format(format); |
| if (!drv) { |
| error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
| return; |
| } |
| |
| proto_drv = bdrv_find_protocol(snapshot_file); |
| if (!proto_drv) { |
| error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
| return; |
| } |
| |
| ret = bdrv_img_create(snapshot_file, format, bs->filename, |
| bs->drv->format_name, NULL, -1, flags); |
| if (ret) { |
| error_set(errp, QERR_UNDEFINED_ERROR); |
| return; |
| } |
| |
| bdrv_drain_all(); |
| bdrv_flush(bs); |
| |
| bdrv_close(bs); |
| ret = bdrv_open(bs, snapshot_file, flags, drv); |
| /* |
| * If reopening the image file we just created fails, fall back |
| * and try to re-open the original image. If that fails too, we |
| * are in serious trouble. |
| */ |
| if (ret != 0) { |
| ret = bdrv_open(bs, old_filename, flags, old_drv); |
| if (ret != 0) { |
| error_set(errp, QERR_OPEN_FILE_FAILED, old_filename); |
| } else { |
| error_set(errp, QERR_OPEN_FILE_FAILED, snapshot_file); |
| } |
| } |
| } |
| |
| static void eject_device(BlockDriverState *bs, int force, Error **errp) |
| { |
| if (bdrv_in_use(bs)) { |
| error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
| return; |
| } |
| if (!bdrv_dev_has_removable_media(bs)) { |
| error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
| return; |
| } |
| |
| if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { |
| bdrv_dev_eject_request(bs, force); |
| if (!force) { |
| error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
| return; |
| } |
| } |
| |
| bdrv_close(bs); |
| } |
| |
| void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
| { |
| BlockDriverState *bs; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| |
| eject_device(bs, force, errp); |
| } |
| |
| void qmp_block_passwd(const char *device, const char *password, Error **errp) |
| { |
| BlockDriverState *bs; |
| int err; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| |
| err = bdrv_set_key(bs, password); |
| if (err == -EINVAL) { |
| error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
| return; |
| } else if (err < 0) { |
| error_set(errp, QERR_INVALID_PASSWORD); |
| return; |
| } |
| } |
| |
| static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
| int bdrv_flags, BlockDriver *drv, |
| const char *password, Error **errp) |
| { |
| if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { |
| error_set(errp, QERR_OPEN_FILE_FAILED, filename); |
| return; |
| } |
| |
| if (bdrv_key_required(bs)) { |
| if (password) { |
| if (bdrv_set_key(bs, password) < 0) { |
| error_set(errp, QERR_INVALID_PASSWORD); |
| } |
| } else { |
| error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), |
| bdrv_get_encrypted_filename(bs)); |
| } |
| } else if (password) { |
| error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
| } |
| } |
| |
| void qmp_change_blockdev(const char *device, const char *filename, |
| bool has_format, const char *format, Error **errp) |
| { |
| BlockDriverState *bs; |
| BlockDriver *drv = NULL; |
| int bdrv_flags; |
| Error *err = NULL; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| |
| if (format) { |
| drv = bdrv_find_whitelisted_format(format); |
| if (!drv) { |
| error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
| return; |
| } |
| } |
| |
| eject_device(bs, 0, &err); |
| if (error_is_set(&err)) { |
| error_propagate(errp, err); |
| return; |
| } |
| |
| bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; |
| bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; |
| |
| qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); |
| } |
| |
| /* throttling disk I/O limits */ |
| void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
| int64_t bps_wr, int64_t iops, int64_t iops_rd, |
| int64_t iops_wr, Error **errp) |
| { |
| BlockIOLimit io_limits; |
| BlockDriverState *bs; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| |
| io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; |
| io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; |
| io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; |
| io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; |
| io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; |
| io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; |
| |
| if (!do_check_io_limits(&io_limits)) { |
| error_set(errp, QERR_INVALID_PARAMETER_COMBINATION); |
| return; |
| } |
| |
| bs->io_limits = io_limits; |
| bs->slice_time = BLOCK_IO_SLICE_TIME; |
| |
| if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { |
| bdrv_io_limits_enable(bs); |
| } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { |
| bdrv_io_limits_disable(bs); |
| } else { |
| if (bs->block_timer) { |
| qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); |
| } |
| } |
| } |
| |
| int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| { |
| const char *id = qdict_get_str(qdict, "id"); |
| BlockDriverState *bs; |
| |
| bs = bdrv_find(id); |
| if (!bs) { |
| qerror_report(QERR_DEVICE_NOT_FOUND, id); |
| return -1; |
| } |
| if (bdrv_in_use(bs)) { |
| qerror_report(QERR_DEVICE_IN_USE, id); |
| return -1; |
| } |
| |
| /* quiesce block driver; prevent further io */ |
| bdrv_drain_all(); |
| bdrv_flush(bs); |
| bdrv_close(bs); |
| |
| /* if we have a device attached to this BlockDriverState |
| * then we need to make the drive anonymous until the device |
| * can be removed. If this is a drive with no device backing |
| * then we can just get rid of the block driver state right here. |
| */ |
| if (bdrv_get_attached_dev(bs)) { |
| bdrv_make_anon(bs); |
| } else { |
| drive_uninit(drive_get_by_blockdev(bs)); |
| } |
| |
| return 0; |
| } |
| |
| void qmp_block_resize(const char *device, int64_t size, Error **errp) |
| { |
| BlockDriverState *bs; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| |
| if (size < 0) { |
| error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
| return; |
| } |
| |
| switch (bdrv_truncate(bs, size)) { |
| case 0: |
| break; |
| case -ENOMEDIUM: |
| error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
| break; |
| case -ENOTSUP: |
| error_set(errp, QERR_UNSUPPORTED); |
| break; |
| case -EACCES: |
| error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
| break; |
| case -EBUSY: |
| error_set(errp, QERR_DEVICE_IN_USE, device); |
| break; |
| default: |
| error_set(errp, QERR_UNDEFINED_ERROR); |
| break; |
| } |
| } |
| |
| static QObject *qobject_from_block_job(BlockJob *job) |
| { |
| return qobject_from_jsonf("{ 'type': %s," |
| "'device': %s," |
| "'len': %" PRId64 "," |
| "'offset': %" PRId64 "," |
| "'speed': %" PRId64 " }", |
| job->job_type->job_type, |
| bdrv_get_device_name(job->bs), |
| job->len, |
| job->offset, |
| job->speed); |
| } |
| |
| static void block_stream_cb(void *opaque, int ret) |
| { |
| BlockDriverState *bs = opaque; |
| QObject *obj; |
| |
| trace_block_stream_cb(bs, bs->job, ret); |
| |
| assert(bs->job); |
| obj = qobject_from_block_job(bs->job); |
| if (ret < 0) { |
| QDict *dict = qobject_to_qdict(obj); |
| qdict_put(dict, "error", qstring_from_str(strerror(-ret))); |
| } |
| |
| if (block_job_is_cancelled(bs->job)) { |
| monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); |
| } else { |
| monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); |
| } |
| qobject_decref(obj); |
| |
| drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); |
| } |
| |
| void qmp_block_stream(const char *device, bool has_base, |
| const char *base, Error **errp) |
| { |
| BlockDriverState *bs; |
| BlockDriverState *base_bs = NULL; |
| int ret; |
| |
| bs = bdrv_find(device); |
| if (!bs) { |
| error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
| return; |
| } |
| |
| if (base) { |
| base_bs = bdrv_find_backing_image(bs, base); |
| if (base_bs == NULL) { |
| error_set(errp, QERR_BASE_NOT_FOUND, base); |
| return; |
| } |
| } |
| |
| ret = stream_start(bs, base_bs, base, block_stream_cb, bs); |
| if (ret < 0) { |
| switch (ret) { |
| case -EBUSY: |
| error_set(errp, QERR_DEVICE_IN_USE, device); |
| return; |
| default: |
| error_set(errp, QERR_NOT_SUPPORTED); |
| return; |
| } |
| } |
| |
| /* Grab a reference so hotplug does not delete the BlockDriverState from |
| * underneath us. |
| */ |
| drive_get_ref(drive_get_by_blockdev(bs)); |
| |
| trace_qmp_block_stream(bs, bs->job); |
| } |
| |
| static BlockJob *find_block_job(const char *device) |
| { |
| BlockDriverState *bs; |
| |
| bs = bdrv_find(device); |
| if (!bs || !bs->job) { |
| return NULL; |
| } |
| return bs->job; |
| } |
| |
| void qmp_block_job_set_speed(const char *device, int64_t value, Error **errp) |
| { |
| BlockJob *job = find_block_job(device); |
| |
| if (!job) { |
| error_set(errp, QERR_DEVICE_NOT_ACTIVE, device); |
| return; |
| } |
| |
| if (block_job_set_speed(job, value) < 0) { |
| error_set(errp, QERR_NOT_SUPPORTED); |
| } |
| } |
| |
| void qmp_block_job_cancel(const char *device, Error **errp) |
| { |
| BlockJob *job = find_block_job(device); |
| |
| if (!job) { |
| error_set(errp, QERR_DEVICE_NOT_ACTIVE, device); |
| return; |
| } |
| |
| trace_qmp_block_job_cancel(job); |
| block_job_cancel(job); |
| } |
| |
| static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
| { |
| BlockJobInfoList **prev = opaque; |
| BlockJob *job = bs->job; |
| |
| if (job) { |
| BlockJobInfoList *elem; |
| BlockJobInfo *info = g_new(BlockJobInfo, 1); |
| *info = (BlockJobInfo){ |
| .type = g_strdup(job->job_type->job_type), |
| .device = g_strdup(bdrv_get_device_name(bs)), |
| .len = job->len, |
| .offset = job->offset, |
| .speed = job->speed, |
| }; |
| |
| elem = g_new0(BlockJobInfoList, 1); |
| elem->value = info; |
| |
| (*prev)->next = elem; |
| *prev = elem; |
| } |
| } |
| |
| BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
| { |
| /* Dummy is a fake list element for holding the head pointer */ |
| BlockJobInfoList dummy = {}; |
| BlockJobInfoList *prev = &dummy; |
| bdrv_iterate(do_qmp_query_block_jobs_one, &prev); |
| return dummy.next; |
| } |
