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.
DriveInfo *dinfo = drive_get_by_blockdev(bs);
if (dinfo && dinfo->auto_del) {
- drive_uninit(dinfo);
+ drive_put_ref(dinfo);
}
}
-QemuOpts *drive_add(const char *file, const char *fmt, ...)
+static int drive_index_to_bus_id(BlockInterfaceType type, int index)
{
- va_list ap;
- char optstr[1024];
- QemuOpts *opts;
+ 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;
+}
- va_start(ap, fmt);
- vsnprintf(optstr, sizeof(optstr), fmt, ap);
- va_end(ap);
+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 = qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
+ 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;
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;
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;
static void bdrv_format_print(void *opaque, const char *name)
{
- fprintf(stderr, " %s", name);
+ error_printf(" %s", name);
}
-void drive_uninit(DriveInfo *dinfo)
+static void drive_uninit(DriveInfo *dinfo)
{
qemu_opts_del(dinfo->opts);
bdrv_delete(dinfo->bdrv);
+ qemu_free(dinfo->id);
QTAILQ_REMOVE(&drives, dinfo, next);
qemu_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++;
+}
+
static int parse_block_error_action(const char *buf, int is_read)
{
if (!strcmp(buf, "ignore")) {
} else if (!strcmp(buf, "report")) {
return BLOCK_ERR_REPORT;
} else {
- fprintf(stderr, "qemu: '%s' invalid %s error action\n",
- buf, is_read ? "read" : "write");
+ error_report("'%s' invalid %s error action",
+ buf, is_read ? "read" : "write");
return -1;
}
}
-DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
+DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
{
const char *buf;
const char *file = NULL;
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 */
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);
+ 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)) {
- fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
+ error_report("invalid physical cyls number");
return NULL;
}
if (heads < 1 || (type == IF_IDE && heads > 16)) {
- fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
+ error_report("invalid physical heads number");
return NULL;
}
if (secs < 1 || (type == IF_IDE && secs > 63)) {
- fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
+ error_report("invalid physical secs number");
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);
+ error_report("'%s' trans must be used with cyls, heads and secs",
+ buf);
return NULL;
}
if (!strcmp(buf, "none"))
else if (!strcmp(buf, "auto"))
translation = BIOS_ATA_TRANSLATION_AUTO;
else {
- fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
+ error_report("'%s' invalid translation type", buf);
return NULL;
}
}
media = MEDIA_DISK;
} else if (!strcmp(buf, "cdrom")) {
if (cyls || secs || heads) {
- fprintf(stderr,
- "qemu: '%s' invalid physical CHS format\n", buf);
+ error_report("CHS can't be set with media=%s", buf);
return NULL;
}
media = MEDIA_CDROM;
} else {
- fprintf(stderr, "qemu: '%s' invalid media\n", buf);
+ error_report("'%s' invalid media", buf);
return NULL;
}
}
if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
if (!strcmp(buf, "off") || !strcmp(buf, "none")) {
- bdrv_flags |= BDRV_O_NOCACHE;
+ bdrv_flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB;
} else if (!strcmp(buf, "writeback")) {
bdrv_flags |= BDRV_O_CACHE_WB;
} else if (!strcmp(buf, "unsafe")) {
} else if (!strcmp(buf, "writethrough")) {
/* this is the default */
} else {
- fprintf(stderr, "qemu: invalid cache option\n");
+ error_report("invalid cache option");
return NULL;
}
}
} else if (!strcmp(buf, "threads")) {
/* this is the default */
} else {
- fprintf(stderr, "qemu: invalid aio option\n");
+ error_report("invalid aio option");
return NULL;
}
}
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;
+ error_printf("Supported formats:");
+ bdrv_iterate_format(bdrv_format_print, NULL);
+ error_printf("\n");
+ return NULL;
}
drv = bdrv_find_whitelisted_format(buf);
if (!drv) {
- fprintf(stderr, "qemu: '%s' invalid format\n", buf);
+ error_report("'%s' invalid format", buf);
return NULL;
}
}
on_write_error = BLOCK_ERR_STOP_ENOSPC;
if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
- fprintf(stderr, "werror is not supported by this format\n");
+ error_report("werror is not supported by this bus type");
return NULL;
}
on_read_error = BLOCK_ERR_REPORT;
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
- fprintf(stderr, "rerror is not supported by this format\n");
+ error_report("rerror is not supported by this bus type");
return NULL;
}
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
if (type != IF_VIRTIO) {
- fprintf(stderr, "addr is not supported\n");
+ error_report("addr is not supported by this bus type");
return NULL;
}
}
if (index != -1) {
if (bus_id != 0 || unit_id != -1) {
- fprintf(stderr,
- "qemu: index cannot be used with bus and unit\n");
+ error_report("index cannot be used with bus and unit");
return NULL;
}
- if (max_devs == 0)
- {
- unit_id = index;
- bus_id = 0;
- } else {
- unit_id = index % max_devs;
- bus_id = index / max_devs;
- }
+ 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,
/* 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);
+ error_report("unit %d too big (max is %d)",
+ unit_id, max_devs - 1);
return NULL;
}
/*
- * ignore multiple definitions
+ * catch multiple definitions
*/
if (drive_get(type, bus_id, unit_id) != NULL) {
- *fatal_error = 0;
+ error_report("drive with bus=%d, unit=%d (index=%d) exists",
+ bus_id, unit_id, index);
return NULL;
}
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);
}
break;
case MEDIA_CDROM:
- bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
+ bdrv_set_removable(dinfo->bdrv, 1);
+ dinfo->media_cd = 1;
break;
}
break;
/* 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);
+ bdrv_set_removable(dinfo->bdrv, 1);
break;
case IF_PFLASH:
case IF_MTD:
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, "driver", "virtio-blk");
qemu_opt_set(opts, "drive", dinfo->id);
if (devaddr)
qemu_opt_set(opts, "addr", devaddr);
break;
- case IF_COUNT:
+ default:
abort();
}
if (!file || !*file) {
- *fatal_error = 0;
- return NULL;
+ return dinfo;
}
if (snapshot) {
/* always use cache=unsafe with snapshot */
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;
+ error_report("readonly not supported by this bus type");
+ goto err;
}
}
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;
+ error_report("could not open disk image %s: %s",
+ file, strerror(-ret));
+ goto err;
}
if (bdrv_key_required(dinfo->bdrv))
autostart = 0;
- *fatal_error = 0;
return dinfo;
+
+err:
+ bdrv_delete(dinfo->bdrv);
+ qemu_free(dinfo->id);
+ QTAILQ_REMOVE(&drives, dinfo, next);
+ qemu_free(dinfo);
+ return NULL;
}
void do_commit(Monitor *mon, const QDict *qdict)
}
}
+int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+ const char *device = qdict_get_str(qdict, "device");
+ const char *filename = qdict_get_try_str(qdict, "snapshot-file");
+ const char *format = qdict_get_try_str(qdict, "format");
+ BlockDriverState *bs;
+ BlockDriver *drv, *old_drv, *proto_drv;
+ int ret = 0;
+ int flags;
+ char old_filename[1024];
+
+ if (!filename) {
+ qerror_report(QERR_MISSING_PARAMETER, "snapshot-file");
+ ret = -1;
+ goto out;
+ }
+
+ bs = bdrv_find(device);
+ if (!bs) {
+ qerror_report(QERR_DEVICE_NOT_FOUND, device);
+ ret = -1;
+ goto out;
+ }
+
+ pstrcpy(old_filename, sizeof(old_filename), bs->filename);
+
+ old_drv = bs->drv;
+ flags = bs->open_flags;
+
+ if (!format) {
+ format = "qcow2";
+ }
+
+ drv = bdrv_find_format(format);
+ if (!drv) {
+ qerror_report(QERR_INVALID_BLOCK_FORMAT, format);
+ ret = -1;
+ goto out;
+ }
+
+ proto_drv = bdrv_find_protocol(filename);
+ if (!proto_drv) {
+ qerror_report(QERR_INVALID_BLOCK_FORMAT, format);
+ ret = -1;
+ goto out;
+ }
+
+ ret = bdrv_img_create(filename, format, bs->filename,
+ bs->drv->format_name, NULL, -1, flags);
+ if (ret) {
+ goto out;
+ }
+
+ qemu_aio_flush();
+ bdrv_flush(bs);
+
+ bdrv_close(bs);
+ ret = bdrv_open(bs, filename, 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) {
+ qerror_report(QERR_OPEN_FILE_FAILED, old_filename);
+ } else {
+ qerror_report(QERR_OPEN_FILE_FAILED, filename);
+ }
+ }
+out:
+ if (ret) {
+ ret = -1;
+ }
+
+ return ret;
+}
+
static int eject_device(Monitor *mon, BlockDriverState *bs, int force)
{
if (!force) {
{
const char *id = qdict_get_str(qdict, "id");
BlockDriverState *bs;
- BlockDriverState **ptr;
- Property *prop;
bs = bdrv_find(id);
if (!bs) {
qerror_report(QERR_DEVICE_NOT_FOUND, id);
return -1;
}
+ if (bdrv_in_use(bs)) {
+ qerror_report(QERR_DEVICE_IN_USE, id);
+ return -1;
+ }
/* quiesce block driver; prevent further io */
qemu_aio_flush();
bdrv_flush(bs);
bdrv_close(bs);
- /* clean up guest state from pointing to host resource by
- * finding and removing DeviceState "drive" property */
- for (prop = bs->peer->info->props; prop && prop->name; prop++) {
- if (prop->info->type == PROP_TYPE_DRIVE) {
- ptr = qdev_get_prop_ptr(bs->peer, prop);
- if ((*ptr) == bs) {
- bdrv_detach(bs, bs->peer);
- *ptr = NULL;
- break;
- }
- }
+ /* if we have a device associated with this BlockDriverState (bs->peer)
+ * 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 (bs->peer) {
+ bdrv_make_anon(bs);
+ } else {
+ drive_uninit(drive_get_by_blockdev(bs));
}
- /* clean up host side */
- drive_uninit(drive_get_by_blockdev(bs));
+ return 0;
+}
+
+/*
+ * XXX: replace the QERR_UNDEFINED_ERROR errors with real values once the
+ * existing QERR_ macro mess is cleaned up. A good example for better
+ * error reports can be found in the qemu-img resize code.
+ */
+int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+ const char *device = qdict_get_str(qdict, "device");
+ int64_t size = qdict_get_int(qdict, "size");
+ BlockDriverState *bs;
+
+ bs = bdrv_find(device);
+ if (!bs) {
+ qerror_report(QERR_DEVICE_NOT_FOUND, device);
+ return -1;
+ }
+
+ if (size < 0) {
+ qerror_report(QERR_UNDEFINED_ERROR);
+ return -1;
+ }
+
+ if (bdrv_truncate(bs, size)) {
+ qerror_report(QERR_UNDEFINED_ERROR);
+ return -1;
+ }
return 0;
}
projects / qemu.git / blobdiff