vga: compile cirrus_vga in hwlib
[qemu.git] / blockdev.c
1 /*
2 * QEMU host block devices
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * later. See the COPYING file in the top-level directory.
8 */
9
10 #include "block.h"
11 #include "blockdev.h"
12 #include "monitor.h"
13 #include "qerror.h"
14 #include "qemu-option.h"
15 #include "qemu-config.h"
16 #include "sysemu.h"
17 #include "block_int.h"
18 #include "qmp-commands.h"
19
20 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
21
22 static const char *const if_name[IF_COUNT] = {
23 [IF_NONE] = "none",
24 [IF_IDE] = "ide",
25 [IF_SCSI] = "scsi",
26 [IF_FLOPPY] = "floppy",
27 [IF_PFLASH] = "pflash",
28 [IF_MTD] = "mtd",
29 [IF_SD] = "sd",
30 [IF_VIRTIO] = "virtio",
31 [IF_XEN] = "xen",
32 };
33
34 static const int if_max_devs[IF_COUNT] = {
35 /*
36 * Do not change these numbers! They govern how drive option
37 * index maps to unit and bus. That mapping is ABI.
38 *
39 * All controllers used to imlement if=T drives need to support
40 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
41 * Otherwise, some index values map to "impossible" bus, unit
42 * values.
43 *
44 * For instance, if you change [IF_SCSI] to 255, -drive
45 * if=scsi,index=12 no longer means bus=1,unit=5, but
46 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
47 * the drive can't be set up. Regression.
48 */
49 [IF_IDE] = 2,
50 [IF_SCSI] = 7,
51 };
52
53 /*
54 * We automatically delete the drive when a device using it gets
55 * unplugged. Questionable feature, but we can't just drop it.
56 * Device models call blockdev_mark_auto_del() to schedule the
57 * automatic deletion, and generic qdev code calls blockdev_auto_del()
58 * when deletion is actually safe.
59 */
60 void blockdev_mark_auto_del(BlockDriverState *bs)
61 {
62 DriveInfo *dinfo = drive_get_by_blockdev(bs);
63
64 if (dinfo) {
65 dinfo->auto_del = 1;
66 }
67 }
68
69 void blockdev_auto_del(BlockDriverState *bs)
70 {
71 DriveInfo *dinfo = drive_get_by_blockdev(bs);
72
73 if (dinfo && dinfo->auto_del) {
74 drive_put_ref(dinfo);
75 }
76 }
77
78 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
79 {
80 int max_devs = if_max_devs[type];
81 return max_devs ? index / max_devs : 0;
82 }
83
84 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
85 {
86 int max_devs = if_max_devs[type];
87 return max_devs ? index % max_devs : index;
88 }
89
90 QemuOpts *drive_def(const char *optstr)
91 {
92 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
93 }
94
95 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
96 const char *optstr)
97 {
98 QemuOpts *opts;
99 char buf[32];
100
101 opts = drive_def(optstr);
102 if (!opts) {
103 return NULL;
104 }
105 if (type != IF_DEFAULT) {
106 qemu_opt_set(opts, "if", if_name[type]);
107 }
108 if (index >= 0) {
109 snprintf(buf, sizeof(buf), "%d", index);
110 qemu_opt_set(opts, "index", buf);
111 }
112 if (file)
113 qemu_opt_set(opts, "file", file);
114 return opts;
115 }
116
117 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
118 {
119 DriveInfo *dinfo;
120
121 /* seek interface, bus and unit */
122
123 QTAILQ_FOREACH(dinfo, &drives, next) {
124 if (dinfo->type == type &&
125 dinfo->bus == bus &&
126 dinfo->unit == unit)
127 return dinfo;
128 }
129
130 return NULL;
131 }
132
133 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
134 {
135 return drive_get(type,
136 drive_index_to_bus_id(type, index),
137 drive_index_to_unit_id(type, index));
138 }
139
140 int drive_get_max_bus(BlockInterfaceType type)
141 {
142 int max_bus;
143 DriveInfo *dinfo;
144
145 max_bus = -1;
146 QTAILQ_FOREACH(dinfo, &drives, next) {
147 if(dinfo->type == type &&
148 dinfo->bus > max_bus)
149 max_bus = dinfo->bus;
150 }
151 return max_bus;
152 }
153
154 /* Get a block device. This should only be used for single-drive devices
155 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
156 appropriate bus. */
157 DriveInfo *drive_get_next(BlockInterfaceType type)
158 {
159 static int next_block_unit[IF_COUNT];
160
161 return drive_get(type, 0, next_block_unit[type]++);
162 }
163
164 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
165 {
166 DriveInfo *dinfo;
167
168 QTAILQ_FOREACH(dinfo, &drives, next) {
169 if (dinfo->bdrv == bs) {
170 return dinfo;
171 }
172 }
173 return NULL;
174 }
175
176 static void bdrv_format_print(void *opaque, const char *name)
177 {
178 error_printf(" %s", name);
179 }
180
181 static void drive_uninit(DriveInfo *dinfo)
182 {
183 qemu_opts_del(dinfo->opts);
184 bdrv_delete(dinfo->bdrv);
185 g_free(dinfo->id);
186 QTAILQ_REMOVE(&drives, dinfo, next);
187 g_free(dinfo);
188 }
189
190 void drive_put_ref(DriveInfo *dinfo)
191 {
192 assert(dinfo->refcount);
193 if (--dinfo->refcount == 0) {
194 drive_uninit(dinfo);
195 }
196 }
197
198 void drive_get_ref(DriveInfo *dinfo)
199 {
200 dinfo->refcount++;
201 }
202
203 static int parse_block_error_action(const char *buf, int is_read)
204 {
205 if (!strcmp(buf, "ignore")) {
206 return BLOCK_ERR_IGNORE;
207 } else if (!is_read && !strcmp(buf, "enospc")) {
208 return BLOCK_ERR_STOP_ENOSPC;
209 } else if (!strcmp(buf, "stop")) {
210 return BLOCK_ERR_STOP_ANY;
211 } else if (!strcmp(buf, "report")) {
212 return BLOCK_ERR_REPORT;
213 } else {
214 error_report("'%s' invalid %s error action",
215 buf, is_read ? "read" : "write");
216 return -1;
217 }
218 }
219
220 static bool do_check_io_limits(BlockIOLimit *io_limits)
221 {
222 bool bps_flag;
223 bool iops_flag;
224
225 assert(io_limits);
226
227 bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
228 && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
229 || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
230 iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
231 && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
232 || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
233 if (bps_flag || iops_flag) {
234 return false;
235 }
236
237 return true;
238 }
239
240 DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
241 {
242 const char *buf;
243 const char *file = NULL;
244 char devname[128];
245 const char *serial;
246 const char *mediastr = "";
247 BlockInterfaceType type;
248 enum { MEDIA_DISK, MEDIA_CDROM } media;
249 int bus_id, unit_id;
250 int cyls, heads, secs, translation;
251 BlockDriver *drv = NULL;
252 int max_devs;
253 int index;
254 int ro = 0;
255 int bdrv_flags = 0;
256 int on_read_error, on_write_error;
257 const char *devaddr;
258 DriveInfo *dinfo;
259 BlockIOLimit io_limits;
260 int snapshot = 0;
261 bool copy_on_read;
262 int ret;
263
264 translation = BIOS_ATA_TRANSLATION_AUTO;
265 media = MEDIA_DISK;
266
267 /* extract parameters */
268 bus_id = qemu_opt_get_number(opts, "bus", 0);
269 unit_id = qemu_opt_get_number(opts, "unit", -1);
270 index = qemu_opt_get_number(opts, "index", -1);
271
272 cyls = qemu_opt_get_number(opts, "cyls", 0);
273 heads = qemu_opt_get_number(opts, "heads", 0);
274 secs = qemu_opt_get_number(opts, "secs", 0);
275
276 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
277 ro = qemu_opt_get_bool(opts, "readonly", 0);
278 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
279
280 file = qemu_opt_get(opts, "file");
281 serial = qemu_opt_get(opts, "serial");
282
283 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
284 pstrcpy(devname, sizeof(devname), buf);
285 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
286 ;
287 if (type == IF_COUNT) {
288 error_report("unsupported bus type '%s'", buf);
289 return NULL;
290 }
291 } else {
292 type = default_to_scsi ? IF_SCSI : IF_IDE;
293 pstrcpy(devname, sizeof(devname), if_name[type]);
294 }
295
296 max_devs = if_max_devs[type];
297
298 if (cyls || heads || secs) {
299 if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
300 error_report("invalid physical cyls number");
301 return NULL;
302 }
303 if (heads < 1 || (type == IF_IDE && heads > 16)) {
304 error_report("invalid physical heads number");
305 return NULL;
306 }
307 if (secs < 1 || (type == IF_IDE && secs > 63)) {
308 error_report("invalid physical secs number");
309 return NULL;
310 }
311 }
312
313 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
314 if (!cyls) {
315 error_report("'%s' trans must be used with cyls, heads and secs",
316 buf);
317 return NULL;
318 }
319 if (!strcmp(buf, "none"))
320 translation = BIOS_ATA_TRANSLATION_NONE;
321 else if (!strcmp(buf, "lba"))
322 translation = BIOS_ATA_TRANSLATION_LBA;
323 else if (!strcmp(buf, "auto"))
324 translation = BIOS_ATA_TRANSLATION_AUTO;
325 else {
326 error_report("'%s' invalid translation type", buf);
327 return NULL;
328 }
329 }
330
331 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
332 if (!strcmp(buf, "disk")) {
333 media = MEDIA_DISK;
334 } else if (!strcmp(buf, "cdrom")) {
335 if (cyls || secs || heads) {
336 error_report("CHS can't be set with media=%s", buf);
337 return NULL;
338 }
339 media = MEDIA_CDROM;
340 } else {
341 error_report("'%s' invalid media", buf);
342 return NULL;
343 }
344 }
345
346 if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
347 if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) {
348 error_report("invalid cache option");
349 return NULL;
350 }
351 }
352
353 #ifdef CONFIG_LINUX_AIO
354 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
355 if (!strcmp(buf, "native")) {
356 bdrv_flags |= BDRV_O_NATIVE_AIO;
357 } else if (!strcmp(buf, "threads")) {
358 /* this is the default */
359 } else {
360 error_report("invalid aio option");
361 return NULL;
362 }
363 }
364 #endif
365
366 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
367 if (strcmp(buf, "?") == 0) {
368 error_printf("Supported formats:");
369 bdrv_iterate_format(bdrv_format_print, NULL);
370 error_printf("\n");
371 return NULL;
372 }
373 drv = bdrv_find_whitelisted_format(buf);
374 if (!drv) {
375 error_report("'%s' invalid format", buf);
376 return NULL;
377 }
378 }
379
380 /* disk I/O throttling */
381 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
382 qemu_opt_get_number(opts, "bps", 0);
383 io_limits.bps[BLOCK_IO_LIMIT_READ] =
384 qemu_opt_get_number(opts, "bps_rd", 0);
385 io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
386 qemu_opt_get_number(opts, "bps_wr", 0);
387 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
388 qemu_opt_get_number(opts, "iops", 0);
389 io_limits.iops[BLOCK_IO_LIMIT_READ] =
390 qemu_opt_get_number(opts, "iops_rd", 0);
391 io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
392 qemu_opt_get_number(opts, "iops_wr", 0);
393
394 if (!do_check_io_limits(&io_limits)) {
395 error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
396 "cannot be used at the same time");
397 return NULL;
398 }
399
400 on_write_error = BLOCK_ERR_STOP_ENOSPC;
401 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
402 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
403 error_report("werror is not supported by this bus type");
404 return NULL;
405 }
406
407 on_write_error = parse_block_error_action(buf, 0);
408 if (on_write_error < 0) {
409 return NULL;
410 }
411 }
412
413 on_read_error = BLOCK_ERR_REPORT;
414 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
415 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
416 error_report("rerror is not supported by this bus type");
417 return NULL;
418 }
419
420 on_read_error = parse_block_error_action(buf, 1);
421 if (on_read_error < 0) {
422 return NULL;
423 }
424 }
425
426 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
427 if (type != IF_VIRTIO) {
428 error_report("addr is not supported by this bus type");
429 return NULL;
430 }
431 }
432
433 /* compute bus and unit according index */
434
435 if (index != -1) {
436 if (bus_id != 0 || unit_id != -1) {
437 error_report("index cannot be used with bus and unit");
438 return NULL;
439 }
440 bus_id = drive_index_to_bus_id(type, index);
441 unit_id = drive_index_to_unit_id(type, index);
442 }
443
444 /* if user doesn't specify a unit_id,
445 * try to find the first free
446 */
447
448 if (unit_id == -1) {
449 unit_id = 0;
450 while (drive_get(type, bus_id, unit_id) != NULL) {
451 unit_id++;
452 if (max_devs && unit_id >= max_devs) {
453 unit_id -= max_devs;
454 bus_id++;
455 }
456 }
457 }
458
459 /* check unit id */
460
461 if (max_devs && unit_id >= max_devs) {
462 error_report("unit %d too big (max is %d)",
463 unit_id, max_devs - 1);
464 return NULL;
465 }
466
467 /*
468 * catch multiple definitions
469 */
470
471 if (drive_get(type, bus_id, unit_id) != NULL) {
472 error_report("drive with bus=%d, unit=%d (index=%d) exists",
473 bus_id, unit_id, index);
474 return NULL;
475 }
476
477 /* init */
478
479 dinfo = g_malloc0(sizeof(*dinfo));
480 if ((buf = qemu_opts_id(opts)) != NULL) {
481 dinfo->id = g_strdup(buf);
482 } else {
483 /* no id supplied -> create one */
484 dinfo->id = g_malloc0(32);
485 if (type == IF_IDE || type == IF_SCSI)
486 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
487 if (max_devs)
488 snprintf(dinfo->id, 32, "%s%i%s%i",
489 devname, bus_id, mediastr, unit_id);
490 else
491 snprintf(dinfo->id, 32, "%s%s%i",
492 devname, mediastr, unit_id);
493 }
494 dinfo->bdrv = bdrv_new(dinfo->id);
495 dinfo->devaddr = devaddr;
496 dinfo->type = type;
497 dinfo->bus = bus_id;
498 dinfo->unit = unit_id;
499 dinfo->opts = opts;
500 dinfo->refcount = 1;
501 if (serial)
502 strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
503 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
504
505 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
506
507 /* disk I/O throttling */
508 bdrv_set_io_limits(dinfo->bdrv, &io_limits);
509
510 switch(type) {
511 case IF_IDE:
512 case IF_SCSI:
513 case IF_XEN:
514 case IF_NONE:
515 switch(media) {
516 case MEDIA_DISK:
517 if (cyls != 0) {
518 bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
519 bdrv_set_translation_hint(dinfo->bdrv, translation);
520 }
521 break;
522 case MEDIA_CDROM:
523 dinfo->media_cd = 1;
524 break;
525 }
526 break;
527 case IF_SD:
528 case IF_FLOPPY:
529 case IF_PFLASH:
530 case IF_MTD:
531 break;
532 case IF_VIRTIO:
533 /* add virtio block device */
534 opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
535 qemu_opt_set(opts, "driver", "virtio-blk");
536 qemu_opt_set(opts, "drive", dinfo->id);
537 if (devaddr)
538 qemu_opt_set(opts, "addr", devaddr);
539 break;
540 default:
541 abort();
542 }
543 if (!file || !*file) {
544 return dinfo;
545 }
546 if (snapshot) {
547 /* always use cache=unsafe with snapshot */
548 bdrv_flags &= ~BDRV_O_CACHE_MASK;
549 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
550 }
551
552 if (copy_on_read) {
553 bdrv_flags |= BDRV_O_COPY_ON_READ;
554 }
555
556 if (media == MEDIA_CDROM) {
557 /* CDROM is fine for any interface, don't check. */
558 ro = 1;
559 } else if (ro == 1) {
560 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
561 error_report("readonly not supported by this bus type");
562 goto err;
563 }
564 }
565
566 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
567
568 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
569 if (ret < 0) {
570 error_report("could not open disk image %s: %s",
571 file, strerror(-ret));
572 goto err;
573 }
574
575 if (bdrv_key_required(dinfo->bdrv))
576 autostart = 0;
577 return dinfo;
578
579 err:
580 bdrv_delete(dinfo->bdrv);
581 g_free(dinfo->id);
582 QTAILQ_REMOVE(&drives, dinfo, next);
583 g_free(dinfo);
584 return NULL;
585 }
586
587 void do_commit(Monitor *mon, const QDict *qdict)
588 {
589 const char *device = qdict_get_str(qdict, "device");
590 BlockDriverState *bs;
591
592 if (!strcmp(device, "all")) {
593 bdrv_commit_all();
594 } else {
595 bs = bdrv_find(device);
596 if (!bs) {
597 qerror_report(QERR_DEVICE_NOT_FOUND, device);
598 return;
599 }
600 bdrv_commit(bs);
601 }
602 }
603
604 void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
605 bool has_format, const char *format,
606 Error **errp)
607 {
608 BlockDriverState *bs;
609 BlockDriver *drv, *old_drv, *proto_drv;
610 int ret = 0;
611 int flags;
612 char old_filename[1024];
613
614 bs = bdrv_find(device);
615 if (!bs) {
616 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
617 return;
618 }
619
620 pstrcpy(old_filename, sizeof(old_filename), bs->filename);
621
622 old_drv = bs->drv;
623 flags = bs->open_flags;
624
625 if (!has_format) {
626 format = "qcow2";
627 }
628
629 drv = bdrv_find_format(format);
630 if (!drv) {
631 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
632 return;
633 }
634
635 proto_drv = bdrv_find_protocol(snapshot_file);
636 if (!proto_drv) {
637 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
638 return;
639 }
640
641 ret = bdrv_img_create(snapshot_file, format, bs->filename,
642 bs->drv->format_name, NULL, -1, flags);
643 if (ret) {
644 error_set(errp, QERR_UNDEFINED_ERROR);
645 return;
646 }
647
648 bdrv_drain_all();
649 bdrv_flush(bs);
650
651 bdrv_close(bs);
652 ret = bdrv_open(bs, snapshot_file, flags, drv);
653 /*
654 * If reopening the image file we just created fails, fall back
655 * and try to re-open the original image. If that fails too, we
656 * are in serious trouble.
657 */
658 if (ret != 0) {
659 ret = bdrv_open(bs, old_filename, flags, old_drv);
660 if (ret != 0) {
661 error_set(errp, QERR_OPEN_FILE_FAILED, old_filename);
662 } else {
663 error_set(errp, QERR_OPEN_FILE_FAILED, snapshot_file);
664 }
665 }
666 }
667
668 static void eject_device(BlockDriverState *bs, int force, Error **errp)
669 {
670 if (!bdrv_dev_has_removable_media(bs)) {
671 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
672 return;
673 }
674
675 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
676 bdrv_dev_eject_request(bs, force);
677 if (!force) {
678 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
679 return;
680 }
681 }
682
683 bdrv_close(bs);
684 }
685
686 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
687 {
688 BlockDriverState *bs;
689
690 bs = bdrv_find(device);
691 if (!bs) {
692 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
693 return;
694 }
695
696 eject_device(bs, force, errp);
697 }
698
699 void qmp_block_passwd(const char *device, const char *password, Error **errp)
700 {
701 BlockDriverState *bs;
702 int err;
703
704 bs = bdrv_find(device);
705 if (!bs) {
706 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
707 return;
708 }
709
710 err = bdrv_set_key(bs, password);
711 if (err == -EINVAL) {
712 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
713 return;
714 } else if (err < 0) {
715 error_set(errp, QERR_INVALID_PASSWORD);
716 return;
717 }
718 }
719
720 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
721 int bdrv_flags, BlockDriver *drv,
722 const char *password, Error **errp)
723 {
724 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
725 error_set(errp, QERR_OPEN_FILE_FAILED, filename);
726 return;
727 }
728
729 if (bdrv_key_required(bs)) {
730 if (password) {
731 if (bdrv_set_key(bs, password) < 0) {
732 error_set(errp, QERR_INVALID_PASSWORD);
733 }
734 } else {
735 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
736 bdrv_get_encrypted_filename(bs));
737 }
738 } else if (password) {
739 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
740 }
741 }
742
743 void qmp_change_blockdev(const char *device, const char *filename,
744 bool has_format, const char *format, Error **errp)
745 {
746 BlockDriverState *bs;
747 BlockDriver *drv = NULL;
748 int bdrv_flags;
749 Error *err = NULL;
750
751 bs = bdrv_find(device);
752 if (!bs) {
753 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
754 return;
755 }
756
757 if (format) {
758 drv = bdrv_find_whitelisted_format(format);
759 if (!drv) {
760 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
761 return;
762 }
763 }
764
765 eject_device(bs, 0, &err);
766 if (error_is_set(&err)) {
767 error_propagate(errp, err);
768 return;
769 }
770
771 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
772 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
773
774 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
775 }
776
777 /* throttling disk I/O limits */
778 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
779 int64_t bps_wr, int64_t iops, int64_t iops_rd,
780 int64_t iops_wr, Error **errp)
781 {
782 BlockIOLimit io_limits;
783 BlockDriverState *bs;
784
785 bs = bdrv_find(device);
786 if (!bs) {
787 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
788 return;
789 }
790
791 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
792 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
793 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
794 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
795 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
796 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
797
798 if (!do_check_io_limits(&io_limits)) {
799 error_set(errp, QERR_INVALID_PARAMETER_COMBINATION);
800 return;
801 }
802
803 bs->io_limits = io_limits;
804 bs->slice_time = BLOCK_IO_SLICE_TIME;
805
806 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
807 bdrv_io_limits_enable(bs);
808 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
809 bdrv_io_limits_disable(bs);
810 } else {
811 if (bs->block_timer) {
812 qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock));
813 }
814 }
815 }
816
817 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
818 {
819 const char *id = qdict_get_str(qdict, "id");
820 BlockDriverState *bs;
821
822 bs = bdrv_find(id);
823 if (!bs) {
824 qerror_report(QERR_DEVICE_NOT_FOUND, id);
825 return -1;
826 }
827 if (bdrv_in_use(bs)) {
828 qerror_report(QERR_DEVICE_IN_USE, id);
829 return -1;
830 }
831
832 /* quiesce block driver; prevent further io */
833 bdrv_drain_all();
834 bdrv_flush(bs);
835 bdrv_close(bs);
836
837 /* if we have a device attached to this BlockDriverState
838 * then we need to make the drive anonymous until the device
839 * can be removed. If this is a drive with no device backing
840 * then we can just get rid of the block driver state right here.
841 */
842 if (bdrv_get_attached_dev(bs)) {
843 bdrv_make_anon(bs);
844 } else {
845 drive_uninit(drive_get_by_blockdev(bs));
846 }
847
848 return 0;
849 }
850
851 void qmp_block_resize(const char *device, int64_t size, Error **errp)
852 {
853 BlockDriverState *bs;
854
855 bs = bdrv_find(device);
856 if (!bs) {
857 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
858 return;
859 }
860
861 if (size < 0) {
862 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
863 return;
864 }
865
866 switch (bdrv_truncate(bs, size)) {
867 case 0:
868 break;
869 case -ENOMEDIUM:
870 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
871 break;
872 case -ENOTSUP:
873 error_set(errp, QERR_UNSUPPORTED);
874 break;
875 case -EACCES:
876 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
877 break;
878 case -EBUSY:
879 error_set(errp, QERR_DEVICE_IN_USE, device);
880 break;
881 default:
882 error_set(errp, QERR_UNDEFINED_ERROR);
883 break;
884 }
885 }