2 * Copyright (c) 2018 Citrix Systems Inc.
4 * This work is licensed under the terms of the GNU GPL, version 2 or later.
5 * See the COPYING file in the top-level directory.
8 #include "qemu/osdep.h"
9 #include "qemu/cutils.h"
10 #include "qemu/module.h"
11 #include "qemu/option.h"
12 #include "qapi/error.h"
13 #include "qapi/qapi-commands-block-core.h"
14 #include "qapi/qapi-commands-misc.h"
15 #include "qapi/qapi-visit-block-core.h"
16 #include "qapi/qobject-input-visitor.h"
17 #include "qapi/visitor.h"
18 #include "qapi/qmp/qdict.h"
19 #include "qapi/qmp/qstring.h"
21 #include "hw/xen/xen_common.h"
22 #include "hw/block/xen_blkif.h"
23 #include "hw/xen/xen-block.h"
24 #include "hw/xen/xen-backend.h"
25 #include "sysemu/blockdev.h"
26 #include "sysemu/block-backend.h"
27 #include "sysemu/iothread.h"
28 #include "dataplane/xen-block.h"
31 static char *xen_block_get_name(XenDevice
*xendev
, Error
**errp
)
33 XenBlockDevice
*blockdev
= XEN_BLOCK_DEVICE(xendev
);
34 XenBlockVdev
*vdev
= &blockdev
->props
.vdev
;
36 return g_strdup_printf("%lu", vdev
->number
);
39 static void xen_block_disconnect(XenDevice
*xendev
, Error
**errp
)
41 XenBlockDevice
*blockdev
= XEN_BLOCK_DEVICE(xendev
);
42 const char *type
= object_get_typename(OBJECT(blockdev
));
43 XenBlockVdev
*vdev
= &blockdev
->props
.vdev
;
45 trace_xen_block_disconnect(type
, vdev
->disk
, vdev
->partition
);
47 xen_block_dataplane_stop(blockdev
->dataplane
);
50 static void xen_block_connect(XenDevice
*xendev
, Error
**errp
)
52 XenBlockDevice
*blockdev
= XEN_BLOCK_DEVICE(xendev
);
53 const char *type
= object_get_typename(OBJECT(blockdev
));
54 XenBlockVdev
*vdev
= &blockdev
->props
.vdev
;
55 unsigned int order
, nr_ring_ref
, *ring_ref
, event_channel
, protocol
;
58 trace_xen_block_connect(type
, vdev
->disk
, vdev
->partition
);
60 if (xen_device_frontend_scanf(xendev
, "ring-page-order", "%u",
63 ring_ref
= g_new(unsigned int, nr_ring_ref
);
65 if (xen_device_frontend_scanf(xendev
, "ring-ref", "%u",
67 error_setg(errp
, "failed to read ring-ref");
71 } else if (order
<= blockdev
->props
.max_ring_page_order
) {
74 nr_ring_ref
= 1 << order
;
75 ring_ref
= g_new(unsigned int, nr_ring_ref
);
77 for (i
= 0; i
< nr_ring_ref
; i
++) {
78 const char *key
= g_strdup_printf("ring-ref%u", i
);
80 if (xen_device_frontend_scanf(xendev
, key
, "%u",
82 error_setg(errp
, "failed to read %s", key
);
83 g_free((gpointer
)key
);
88 g_free((gpointer
)key
);
91 error_setg(errp
, "invalid ring-page-order (%d)", order
);
95 if (xen_device_frontend_scanf(xendev
, "event-channel", "%u",
96 &event_channel
) != 1) {
97 error_setg(errp
, "failed to read event-channel");
102 if (xen_device_frontend_scanf(xendev
, "protocol", "%ms",
104 protocol
= BLKIF_PROTOCOL_NATIVE
;
106 if (strcmp(str
, XEN_IO_PROTO_ABI_X86_32
) == 0) {
107 protocol
= BLKIF_PROTOCOL_X86_32
;
108 } else if (strcmp(str
, XEN_IO_PROTO_ABI_X86_64
) == 0) {
109 protocol
= BLKIF_PROTOCOL_X86_64
;
111 protocol
= BLKIF_PROTOCOL_NATIVE
;
117 xen_block_dataplane_start(blockdev
->dataplane
, ring_ref
, nr_ring_ref
,
118 event_channel
, protocol
, errp
);
123 static void xen_block_unrealize(XenDevice
*xendev
, Error
**errp
)
125 XenBlockDevice
*blockdev
= XEN_BLOCK_DEVICE(xendev
);
126 XenBlockDeviceClass
*blockdev_class
=
127 XEN_BLOCK_DEVICE_GET_CLASS(xendev
);
128 const char *type
= object_get_typename(OBJECT(blockdev
));
129 XenBlockVdev
*vdev
= &blockdev
->props
.vdev
;
131 if (vdev
->type
== XEN_BLOCK_VDEV_TYPE_INVALID
) {
135 trace_xen_block_unrealize(type
, vdev
->disk
, vdev
->partition
);
137 /* Disconnect from the frontend in case this has not already happened */
138 xen_block_disconnect(xendev
, NULL
);
140 xen_block_dataplane_destroy(blockdev
->dataplane
);
141 blockdev
->dataplane
= NULL
;
143 if (blockdev_class
->unrealize
) {
144 blockdev_class
->unrealize(blockdev
, errp
);
148 static void xen_block_set_size(XenBlockDevice
*blockdev
)
150 const char *type
= object_get_typename(OBJECT(blockdev
));
151 XenBlockVdev
*vdev
= &blockdev
->props
.vdev
;
152 BlockConf
*conf
= &blockdev
->props
.conf
;
153 int64_t sectors
= blk_getlength(conf
->blk
) / XEN_BLKIF_SECTOR_SIZE
;
154 XenDevice
*xendev
= XEN_DEVICE(blockdev
);
156 trace_xen_block_size(type
, vdev
->disk
, vdev
->partition
, sectors
);
158 xen_device_backend_printf(xendev
, "sectors", "%"PRIi64
, sectors
);
161 static void xen_block_resize_cb(void *opaque
)
163 XenBlockDevice
*blockdev
= opaque
;
164 XenDevice
*xendev
= XEN_DEVICE(blockdev
);
165 enum xenbus_state state
= xen_device_backend_get_state(xendev
);
167 xen_block_set_size(blockdev
);
170 * Mimic the behaviour of Linux xen-blkback and re-write the state
171 * to trigger the frontend watch.
173 xen_device_backend_printf(xendev
, "state", "%u", state
);
176 static const BlockDevOps xen_block_dev_ops
= {
177 .resize_cb
= xen_block_resize_cb
,
180 static void xen_block_realize(XenDevice
*xendev
, Error
**errp
)
182 XenBlockDevice
*blockdev
= XEN_BLOCK_DEVICE(xendev
);
183 XenBlockDeviceClass
*blockdev_class
=
184 XEN_BLOCK_DEVICE_GET_CLASS(xendev
);
185 const char *type
= object_get_typename(OBJECT(blockdev
));
186 XenBlockVdev
*vdev
= &blockdev
->props
.vdev
;
187 BlockConf
*conf
= &blockdev
->props
.conf
;
188 Error
*local_err
= NULL
;
190 if (vdev
->type
== XEN_BLOCK_VDEV_TYPE_INVALID
) {
191 error_setg(errp
, "vdev property not set");
195 trace_xen_block_realize(type
, vdev
->disk
, vdev
->partition
);
197 if (blockdev_class
->realize
) {
198 blockdev_class
->realize(blockdev
, &local_err
);
200 error_propagate(errp
, local_err
);
206 * The blkif protocol does not deal with removable media, so it must
207 * always be present, even for CDRom devices.
210 if (!blk_is_inserted(conf
->blk
)) {
211 error_setg(errp
, "device needs media, but drive is empty");
215 if (!blkconf_apply_backend_options(conf
, blockdev
->info
& VDISK_READONLY
,
220 if (!(blockdev
->info
& VDISK_CDROM
) &&
221 !blkconf_geometry(conf
, NULL
, 65535, 255, 255, errp
)) {
225 blkconf_blocksizes(conf
);
227 if (conf
->logical_block_size
!= XEN_BLKIF_SECTOR_SIZE
) {
228 error_setg(errp
, "logical_block_size != %u not supported",
229 XEN_BLKIF_SECTOR_SIZE
);
233 if (conf
->logical_block_size
> conf
->physical_block_size
) {
235 errp
, "logical_block_size > physical_block_size not supported");
239 blk_set_dev_ops(conf
->blk
, &xen_block_dev_ops
, blockdev
);
240 blk_set_guest_block_size(conf
->blk
, conf
->logical_block_size
);
242 if (conf
->discard_granularity
== -1) {
243 conf
->discard_granularity
= conf
->physical_block_size
;
246 if (blk_get_flags(conf
->blk
) & BDRV_O_UNMAP
) {
247 xen_device_backend_printf(xendev
, "feature-discard", "%u", 1);
248 xen_device_backend_printf(xendev
, "discard-granularity", "%u",
249 conf
->discard_granularity
);
252 xen_device_backend_printf(xendev
, "feature-flush-cache", "%u", 1);
253 xen_device_backend_printf(xendev
, "max-ring-page-order", "%u",
254 blockdev
->props
.max_ring_page_order
);
255 xen_device_backend_printf(xendev
, "info", "%u", blockdev
->info
);
257 xen_device_frontend_printf(xendev
, "virtual-device", "%lu",
259 xen_device_frontend_printf(xendev
, "device-type", "%s",
260 blockdev
->device_type
);
262 xen_device_backend_printf(xendev
, "sector-size", "%u",
263 XEN_BLKIF_SECTOR_SIZE
);
265 xen_block_set_size(blockdev
);
267 blockdev
->dataplane
=
268 xen_block_dataplane_create(xendev
, conf
, blockdev
->props
.iothread
);
271 static void xen_block_frontend_changed(XenDevice
*xendev
,
272 enum xenbus_state frontend_state
,
275 enum xenbus_state backend_state
= xen_device_backend_get_state(xendev
);
276 Error
*local_err
= NULL
;
278 switch (frontend_state
) {
279 case XenbusStateInitialised
:
280 case XenbusStateConnected
:
281 if (backend_state
== XenbusStateConnected
) {
285 xen_block_disconnect(xendev
, &local_err
);
287 error_propagate(errp
, local_err
);
291 xen_block_connect(xendev
, &local_err
);
293 error_propagate(errp
, local_err
);
297 xen_device_backend_set_state(xendev
, XenbusStateConnected
);
300 case XenbusStateClosing
:
301 xen_device_backend_set_state(xendev
, XenbusStateClosing
);
304 case XenbusStateClosed
:
305 xen_block_disconnect(xendev
, &local_err
);
307 error_propagate(errp
, local_err
);
311 xen_device_backend_set_state(xendev
, XenbusStateClosed
);
319 static char *disk_to_vbd_name(unsigned int disk
)
321 char *name
, *prefix
= (disk
>= 26) ?
322 disk_to_vbd_name((disk
/ 26) - 1) : g_strdup("");
324 name
= g_strdup_printf("%s%c", prefix
, 'a' + disk
% 26);
330 static void xen_block_get_vdev(Object
*obj
, Visitor
*v
, const char *name
,
331 void *opaque
, Error
**errp
)
333 DeviceState
*dev
= DEVICE(obj
);
334 Property
*prop
= opaque
;
335 XenBlockVdev
*vdev
= qdev_get_prop_ptr(dev
, prop
);
338 switch (vdev
->type
) {
339 case XEN_BLOCK_VDEV_TYPE_DP
:
340 str
= g_strdup_printf("d%lup%lu", vdev
->disk
, vdev
->partition
);
343 case XEN_BLOCK_VDEV_TYPE_XVD
:
344 case XEN_BLOCK_VDEV_TYPE_HD
:
345 case XEN_BLOCK_VDEV_TYPE_SD
: {
346 char *name
= disk_to_vbd_name(vdev
->disk
);
348 str
= g_strdup_printf("%s%s%lu",
349 (vdev
->type
== XEN_BLOCK_VDEV_TYPE_XVD
) ?
351 (vdev
->type
== XEN_BLOCK_VDEV_TYPE_HD
) ?
354 name
, vdev
->partition
);
359 error_setg(errp
, "invalid vdev type");
363 visit_type_str(v
, name
, &str
, errp
);
367 static int vbd_name_to_disk(const char *name
, const char **endp
,
372 while (*name
!= '\0') {
373 if (!g_ascii_isalpha(*name
) || !g_ascii_islower(*name
)) {
378 n
+= *name
++ - 'a' + 1;
391 static void xen_block_set_vdev(Object
*obj
, Visitor
*v
, const char *name
,
392 void *opaque
, Error
**errp
)
394 DeviceState
*dev
= DEVICE(obj
);
395 Property
*prop
= opaque
;
396 XenBlockVdev
*vdev
= qdev_get_prop_ptr(dev
, prop
);
397 Error
*local_err
= NULL
;
402 qdev_prop_set_after_realize(dev
, name
, errp
);
406 visit_type_str(v
, name
, &str
, &local_err
);
408 error_propagate(errp
, local_err
);
412 p
= strchr(str
, 'd');
419 vdev
->type
= XEN_BLOCK_VDEV_TYPE_DP
;
420 } else if (strcmp(str
, "xv") == 0) {
421 vdev
->type
= XEN_BLOCK_VDEV_TYPE_XVD
;
422 } else if (strcmp(str
, "h") == 0) {
423 vdev
->type
= XEN_BLOCK_VDEV_TYPE_HD
;
424 } else if (strcmp(str
, "s") == 0) {
425 vdev
->type
= XEN_BLOCK_VDEV_TYPE_SD
;
430 if (vdev
->type
== XEN_BLOCK_VDEV_TYPE_DP
) {
431 if (qemu_strtoul(p
, &end
, 10, &vdev
->disk
)) {
436 if (*(++end
) == '\0') {
441 if (vbd_name_to_disk(p
, &end
, &vdev
->disk
)) {
449 if (qemu_strtoul(p
, &end
, 10, &vdev
->partition
)) {
460 switch (vdev
->type
) {
461 case XEN_BLOCK_VDEV_TYPE_DP
:
462 case XEN_BLOCK_VDEV_TYPE_XVD
:
463 if (vdev
->disk
< (1 << 4) && vdev
->partition
< (1 << 4)) {
464 vdev
->number
= (202 << 8) | (vdev
->disk
<< 4) |
466 } else if (vdev
->disk
< (1 << 20) && vdev
->partition
< (1 << 8)) {
467 vdev
->number
= (1 << 28) | (vdev
->disk
<< 8) |
474 case XEN_BLOCK_VDEV_TYPE_HD
:
475 if ((vdev
->disk
== 0 || vdev
->disk
== 1) &&
476 vdev
->partition
< (1 << 6)) {
477 vdev
->number
= (3 << 8) | (vdev
->disk
<< 6) | vdev
->partition
;
478 } else if ((vdev
->disk
== 2 || vdev
->disk
== 3) &&
479 vdev
->partition
< (1 << 6)) {
480 vdev
->number
= (22 << 8) | ((vdev
->disk
- 2) << 6) |
487 case XEN_BLOCK_VDEV_TYPE_SD
:
488 if (vdev
->disk
< (1 << 4) && vdev
->partition
< (1 << 4)) {
489 vdev
->number
= (8 << 8) | (vdev
->disk
<< 4) | vdev
->partition
;
503 error_setg(errp
, "invalid virtual disk specifier");
505 vdev
->type
= XEN_BLOCK_VDEV_TYPE_INVALID
;
510 * This property deals with 'vdev' names adhering to the Xen VBD naming
511 * scheme described in:
513 * https://xenbits.xen.org/docs/unstable/man/xen-vbd-interface.7.html
515 const PropertyInfo xen_block_prop_vdev
= {
517 .description
= "Virtual Disk specifier: d*p*/xvd*/hd*/sd*",
518 .get
= xen_block_get_vdev
,
519 .set
= xen_block_set_vdev
,
522 static Property xen_block_props
[] = {
523 DEFINE_PROP("vdev", XenBlockDevice
, props
.vdev
,
524 xen_block_prop_vdev
, XenBlockVdev
),
525 DEFINE_BLOCK_PROPERTIES(XenBlockDevice
, props
.conf
),
526 DEFINE_PROP_UINT32("max-ring-page-order", XenBlockDevice
,
527 props
.max_ring_page_order
, 4),
528 DEFINE_PROP_LINK("iothread", XenBlockDevice
, props
.iothread
,
529 TYPE_IOTHREAD
, IOThread
*),
530 DEFINE_PROP_END_OF_LIST()
533 static void xen_block_class_init(ObjectClass
*class, void *data
)
535 DeviceClass
*dev_class
= DEVICE_CLASS(class);
536 XenDeviceClass
*xendev_class
= XEN_DEVICE_CLASS(class);
538 xendev_class
->backend
= "qdisk";
539 xendev_class
->device
= "vbd";
540 xendev_class
->get_name
= xen_block_get_name
;
541 xendev_class
->realize
= xen_block_realize
;
542 xendev_class
->frontend_changed
= xen_block_frontend_changed
;
543 xendev_class
->unrealize
= xen_block_unrealize
;
545 dev_class
->props
= xen_block_props
;
548 static const TypeInfo xen_block_type_info
= {
549 .name
= TYPE_XEN_BLOCK_DEVICE
,
550 .parent
= TYPE_XEN_DEVICE
,
551 .instance_size
= sizeof(XenBlockDevice
),
553 .class_size
= sizeof(XenBlockDeviceClass
),
554 .class_init
= xen_block_class_init
,
557 static void xen_disk_unrealize(XenBlockDevice
*blockdev
, Error
**errp
)
559 trace_xen_disk_unrealize();
562 static void xen_disk_realize(XenBlockDevice
*blockdev
, Error
**errp
)
564 BlockConf
*conf
= &blockdev
->props
.conf
;
566 trace_xen_disk_realize();
568 blockdev
->device_type
= "disk";
571 error_setg(errp
, "drive property not set");
575 blockdev
->info
= blk_is_read_only(conf
->blk
) ? VDISK_READONLY
: 0;
578 static void xen_disk_class_init(ObjectClass
*class, void *data
)
580 DeviceClass
*dev_class
= DEVICE_CLASS(class);
581 XenBlockDeviceClass
*blockdev_class
= XEN_BLOCK_DEVICE_CLASS(class);
583 blockdev_class
->realize
= xen_disk_realize
;
584 blockdev_class
->unrealize
= xen_disk_unrealize
;
586 dev_class
->desc
= "Xen Disk Device";
589 static const TypeInfo xen_disk_type_info
= {
590 .name
= TYPE_XEN_DISK_DEVICE
,
591 .parent
= TYPE_XEN_BLOCK_DEVICE
,
592 .instance_size
= sizeof(XenDiskDevice
),
593 .class_init
= xen_disk_class_init
,
596 static void xen_cdrom_unrealize(XenBlockDevice
*blockdev
, Error
**errp
)
598 trace_xen_cdrom_unrealize();
601 static void xen_cdrom_realize(XenBlockDevice
*blockdev
, Error
**errp
)
603 BlockConf
*conf
= &blockdev
->props
.conf
;
605 trace_xen_cdrom_realize();
607 blockdev
->device_type
= "cdrom";
612 /* Set up an empty drive */
613 conf
->blk
= blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL
);
615 rc
= blk_attach_dev(conf
->blk
, DEVICE(blockdev
));
617 error_setg_errno(errp
, -rc
, "failed to create drive");
622 blockdev
->info
= VDISK_READONLY
| VDISK_CDROM
;
625 static void xen_cdrom_class_init(ObjectClass
*class, void *data
)
627 DeviceClass
*dev_class
= DEVICE_CLASS(class);
628 XenBlockDeviceClass
*blockdev_class
= XEN_BLOCK_DEVICE_CLASS(class);
630 blockdev_class
->realize
= xen_cdrom_realize
;
631 blockdev_class
->unrealize
= xen_cdrom_unrealize
;
633 dev_class
->desc
= "Xen CD-ROM Device";
636 static const TypeInfo xen_cdrom_type_info
= {
637 .name
= TYPE_XEN_CDROM_DEVICE
,
638 .parent
= TYPE_XEN_BLOCK_DEVICE
,
639 .instance_size
= sizeof(XenCDRomDevice
),
640 .class_init
= xen_cdrom_class_init
,
643 static void xen_block_register_types(void)
645 type_register_static(&xen_block_type_info
);
646 type_register_static(&xen_disk_type_info
);
647 type_register_static(&xen_cdrom_type_info
);
650 type_init(xen_block_register_types
)
652 static void xen_block_blockdev_del(const char *node_name
, Error
**errp
)
654 trace_xen_block_blockdev_del(node_name
);
656 qmp_blockdev_del(node_name
, errp
);
659 static char *xen_block_blockdev_add(const char *id
, QDict
*qdict
,
662 const char *driver
= qdict_get_try_str(qdict
, "driver");
663 BlockdevOptions
*options
= NULL
;
664 Error
*local_err
= NULL
;
669 error_setg(errp
, "no 'driver' parameter");
673 node_name
= g_strdup_printf("%s-%s", id
, driver
);
674 qdict_put_str(qdict
, "node-name", node_name
);
676 trace_xen_block_blockdev_add(node_name
);
678 v
= qobject_input_visitor_new(QOBJECT(qdict
));
679 visit_type_BlockdevOptions(v
, NULL
, &options
, &local_err
);
683 error_propagate(errp
, local_err
);
687 qmp_blockdev_add(options
, &local_err
);
690 error_propagate(errp
, local_err
);
694 qapi_free_BlockdevOptions(options
);
700 qapi_free_BlockdevOptions(options
);
707 static void xen_block_drive_destroy(XenBlockDrive
*drive
, Error
**errp
)
709 char *node_name
= drive
->node_name
;
712 Error
*local_err
= NULL
;
714 xen_block_blockdev_del(node_name
, &local_err
);
716 error_propagate(errp
, local_err
);
720 drive
->node_name
= NULL
;
726 static XenBlockDrive
*xen_block_drive_create(const char *id
,
727 const char *device_type
,
728 QDict
*opts
, Error
**errp
)
730 const char *params
= qdict_get_try_str(opts
, "params");
731 const char *mode
= qdict_get_try_str(opts
, "mode");
732 const char *direct_io_safe
= qdict_get_try_str(opts
, "direct-io-safe");
733 const char *discard_enable
= qdict_get_try_str(opts
, "discard-enable");
735 char *filename
= NULL
;
736 XenBlockDrive
*drive
= NULL
;
737 Error
*local_err
= NULL
;
742 char **v
= g_strsplit(params
, ":", 2);
745 filename
= g_strdup(v
[0]);
746 driver
= g_strdup("raw");
748 if (strcmp(v
[0], "aio") == 0) {
749 driver
= g_strdup("raw");
750 } else if (strcmp(v
[0], "vhd") == 0) {
751 driver
= g_strdup("vpc");
753 driver
= g_strdup(v
[0]);
755 filename
= g_strdup(v
[1]);
760 error_setg(errp
, "no params");
767 drive
= g_new0(XenBlockDrive
, 1);
768 drive
->id
= g_strdup(id
);
770 file_layer
= qdict_new();
771 driver_layer
= qdict_new();
773 qdict_put_str(file_layer
, "driver", "file");
774 qdict_put_str(file_layer
, "filename", filename
);
777 if (mode
&& *mode
!= 'w') {
778 qdict_put_bool(file_layer
, "read-only", true);
781 if (direct_io_safe
) {
784 if (!qemu_strtoul(direct_io_safe
, NULL
, 2, &value
) && !!value
) {
785 QDict
*cache_qdict
= qdict_new();
787 qdict_put_bool(cache_qdict
, "direct", true);
788 qdict_put(file_layer
, "cache", cache_qdict
);
790 qdict_put_str(file_layer
, "aio", "native");
794 if (discard_enable
) {
797 if (!qemu_strtoul(discard_enable
, NULL
, 2, &value
) && !!value
) {
798 qdict_put_str(file_layer
, "discard", "unmap");
799 qdict_put_str(driver_layer
, "discard", "unmap");
804 * It is necessary to turn file locking off as an emulated device
805 * may have already opened the same image file.
807 qdict_put_str(file_layer
, "locking", "off");
809 qdict_put_str(driver_layer
, "driver", driver
);
812 qdict_put(driver_layer
, "file", file_layer
);
814 g_assert(!drive
->node_name
);
815 drive
->node_name
= xen_block_blockdev_add(drive
->id
, driver_layer
,
818 qobject_unref(driver_layer
);
822 error_propagate(errp
, local_err
);
823 xen_block_drive_destroy(drive
, NULL
);
830 static const char *xen_block_drive_get_node_name(XenBlockDrive
*drive
)
832 return drive
->node_name
? drive
->node_name
: "";
835 static void xen_block_iothread_destroy(XenBlockIOThread
*iothread
,
838 qmp_object_del(iothread
->id
, errp
);
840 g_free(iothread
->id
);
844 static XenBlockIOThread
*xen_block_iothread_create(const char *id
,
847 XenBlockIOThread
*iothread
= g_new(XenBlockIOThread
, 1);
848 Error
*local_err
= NULL
;
850 iothread
->id
= g_strdup(id
);
852 qmp_object_add(TYPE_IOTHREAD
, id
, false, NULL
, &local_err
);
854 error_propagate(errp
, local_err
);
856 g_free(iothread
->id
);
864 static void xen_block_device_create(XenBackendInstance
*backend
,
865 QDict
*opts
, Error
**errp
)
867 XenBus
*xenbus
= xen_backend_get_bus(backend
);
868 const char *name
= xen_backend_get_name(backend
);
869 unsigned long number
;
870 const char *vdev
, *device_type
;
871 XenBlockDrive
*drive
= NULL
;
872 XenBlockIOThread
*iothread
= NULL
;
873 XenDevice
*xendev
= NULL
;
874 Error
*local_err
= NULL
;
876 XenBlockDevice
*blockdev
;
878 if (qemu_strtoul(name
, NULL
, 10, &number
)) {
879 error_setg(errp
, "failed to parse name '%s'", name
);
883 trace_xen_block_device_create(number
);
885 vdev
= qdict_get_try_str(opts
, "dev");
887 error_setg(errp
, "no dev parameter");
891 device_type
= qdict_get_try_str(opts
, "device-type");
893 error_setg(errp
, "no device-type parameter");
897 if (!strcmp(device_type
, "disk")) {
898 type
= TYPE_XEN_DISK_DEVICE
;
899 } else if (!strcmp(device_type
, "cdrom")) {
900 type
= TYPE_XEN_CDROM_DEVICE
;
902 error_setg(errp
, "invalid device-type parameter '%s'", device_type
);
906 drive
= xen_block_drive_create(vdev
, device_type
, opts
, &local_err
);
908 error_propagate_prepend(errp
, local_err
, "failed to create drive: ");
912 iothread
= xen_block_iothread_create(vdev
, &local_err
);
914 error_propagate_prepend(errp
, local_err
,
915 "failed to create iothread: ");
919 xendev
= XEN_DEVICE(qdev_create(BUS(xenbus
), type
));
920 blockdev
= XEN_BLOCK_DEVICE(xendev
);
922 object_property_set_str(OBJECT(xendev
), vdev
, "vdev", &local_err
);
924 error_propagate_prepend(errp
, local_err
, "failed to set 'vdev': ");
928 object_property_set_str(OBJECT(xendev
),
929 xen_block_drive_get_node_name(drive
), "drive",
932 error_propagate_prepend(errp
, local_err
, "failed to set 'drive': ");
936 object_property_set_str(OBJECT(xendev
), iothread
->id
, "iothread",
939 error_propagate_prepend(errp
, local_err
,
940 "failed to set 'iothread': ");
944 blockdev
->iothread
= iothread
;
945 blockdev
->drive
= drive
;
947 object_property_set_bool(OBJECT(xendev
), true, "realized", &local_err
);
949 error_propagate_prepend(errp
, local_err
,
950 "realization of device %s failed: ",
955 xen_backend_set_device(backend
, xendev
);
960 object_unparent(OBJECT(xendev
));
964 xen_block_iothread_destroy(iothread
, NULL
);
968 xen_block_drive_destroy(drive
, NULL
);
972 static void xen_block_device_destroy(XenBackendInstance
*backend
,
975 XenDevice
*xendev
= xen_backend_get_device(backend
);
976 XenBlockDevice
*blockdev
= XEN_BLOCK_DEVICE(xendev
);
977 XenBlockVdev
*vdev
= &blockdev
->props
.vdev
;
978 XenBlockDrive
*drive
= blockdev
->drive
;
979 XenBlockIOThread
*iothread
= blockdev
->iothread
;
981 trace_xen_block_device_destroy(vdev
->number
);
983 object_unparent(OBJECT(xendev
));
986 Error
*local_err
= NULL
;
988 xen_block_iothread_destroy(iothread
, &local_err
);
990 error_propagate_prepend(errp
, local_err
,
991 "failed to destroy iothread: ");
997 Error
*local_err
= NULL
;
999 xen_block_drive_destroy(drive
, &local_err
);
1001 error_propagate_prepend(errp
, local_err
,
1002 "failed to destroy drive: ");
1007 static const XenBackendInfo xen_block_backend_info
= {
1009 .create
= xen_block_device_create
,
1010 .destroy
= xen_block_device_destroy
,
1013 static void xen_block_register_backend(void)
1015 xen_backend_register(&xen_block_backend_info
);
1018 xen_backend_init(xen_block_register_backend
);