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ipmi: use a function to initialize the SDR table
[qemu/rayw.git] / blockdev.c
blob0f20c6511f47138e5d62bbeed259598844f20c83
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 * This file incorporates work covered by the following copyright and
10 * permission notice:
11 *
12 * Copyright (c) 2003-2008 Fabrice Bellard
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 * THE SOFTWARE.
31 */
32
33 #include "qemu/osdep.h"
34 #include "sysemu/block-backend.h"
35 #include "sysemu/blockdev.h"
36 #include "hw/block/block.h"
37 #include "block/blockjob.h"
38 #include "block/throttle-groups.h"
39 #include "monitor/monitor.h"
40 #include "qemu/error-report.h"
41 #include "qemu/option.h"
42 #include "qemu/config-file.h"
43 #include "qapi/qmp/types.h"
44 #include "qapi-visit.h"
45 #include "qapi/qmp/qerror.h"
46 #include "qapi/qmp-output-visitor.h"
47 #include "qapi/util.h"
48 #include "sysemu/sysemu.h"
49 #include "block/block_int.h"
50 #include "qmp-commands.h"
51 #include "trace.h"
52 #include "sysemu/arch_init.h"
53
54 static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
55 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
56
57 static const char *const if_name[IF_COUNT] = {
58 [IF_NONE] = "none",
59 [IF_IDE] = "ide",
60 [IF_SCSI] = "scsi",
61 [IF_FLOPPY] = "floppy",
62 [IF_PFLASH] = "pflash",
63 [IF_MTD] = "mtd",
64 [IF_SD] = "sd",
65 [IF_VIRTIO] = "virtio",
66 [IF_XEN] = "xen",
67 };
68
69 static int if_max_devs[IF_COUNT] = {
70 /*
71 * Do not change these numbers! They govern how drive option
72 * index maps to unit and bus. That mapping is ABI.
73 *
74 * All controllers used to imlement if=T drives need to support
75 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
76 * Otherwise, some index values map to "impossible" bus, unit
77 * values.
78 *
79 * For instance, if you change [IF_SCSI] to 255, -drive
80 * if=scsi,index=12 no longer means bus=1,unit=5, but
81 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
82 * the drive can't be set up. Regression.
83 */
84 [IF_IDE] = 2,
85 [IF_SCSI] = 7,
86 };
87
88 /**
89 * Boards may call this to offer board-by-board overrides
90 * of the default, global values.
91 */
92 void override_max_devs(BlockInterfaceType type, int max_devs)
93 {
94 BlockBackend *blk;
95 DriveInfo *dinfo;
96
97 if (max_devs <= 0) {
98 return;
99 }
100
101 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
102 dinfo = blk_legacy_dinfo(blk);
103 if (dinfo->type == type) {
104 fprintf(stderr, "Cannot override units-per-bus property of"
105 " the %s interface, because a drive of that type has"
106 " already been added.\n", if_name[type]);
107 g_assert_not_reached();
108 }
109 }
110
111 if_max_devs[type] = max_devs;
112 }
113
114 /*
115 * We automatically delete the drive when a device using it gets
116 * unplugged. Questionable feature, but we can't just drop it.
117 * Device models call blockdev_mark_auto_del() to schedule the
118 * automatic deletion, and generic qdev code calls blockdev_auto_del()
119 * when deletion is actually safe.
120 */
121 void blockdev_mark_auto_del(BlockBackend *blk)
122 {
123 DriveInfo *dinfo = blk_legacy_dinfo(blk);
124 BlockDriverState *bs = blk_bs(blk);
125 AioContext *aio_context;
126
127 if (!dinfo) {
128 return;
129 }
130
131 if (bs) {
132 aio_context = bdrv_get_aio_context(bs);
133 aio_context_acquire(aio_context);
134
135 if (bs->job) {
136 block_job_cancel(bs->job);
137 }
138
139 aio_context_release(aio_context);
140 }
141
142 dinfo->auto_del = 1;
143 }
144
145 void blockdev_auto_del(BlockBackend *blk)
146 {
147 DriveInfo *dinfo = blk_legacy_dinfo(blk);
148
149 if (dinfo && dinfo->auto_del) {
150 blk_unref(blk);
151 }
152 }
153
154 /**
155 * Returns the current mapping of how many units per bus
156 * a particular interface can support.
157 *
158 * A positive integer indicates n units per bus.
159 * 0 implies the mapping has not been established.
160 * -1 indicates an invalid BlockInterfaceType was given.
161 */
162 int drive_get_max_devs(BlockInterfaceType type)
163 {
164 if (type >= IF_IDE && type < IF_COUNT) {
165 return if_max_devs[type];
166 }
167
168 return -1;
169 }
170
171 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
172 {
173 int max_devs = if_max_devs[type];
174 return max_devs ? index / max_devs : 0;
175 }
176
177 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
178 {
179 int max_devs = if_max_devs[type];
180 return max_devs ? index % max_devs : index;
181 }
182
183 QemuOpts *drive_def(const char *optstr)
184 {
185 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
186 }
187
188 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
189 const char *optstr)
190 {
191 QemuOpts *opts;
192
193 opts = drive_def(optstr);
194 if (!opts) {
195 return NULL;
196 }
197 if (type != IF_DEFAULT) {
198 qemu_opt_set(opts, "if", if_name[type], &error_abort);
199 }
200 if (index >= 0) {
201 qemu_opt_set_number(opts, "index", index, &error_abort);
202 }
203 if (file)
204 qemu_opt_set(opts, "file", file, &error_abort);
205 return opts;
206 }
207
208 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
209 {
210 BlockBackend *blk;
211 DriveInfo *dinfo;
212
213 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
214 dinfo = blk_legacy_dinfo(blk);
215 if (dinfo && dinfo->type == type
216 && dinfo->bus == bus && dinfo->unit == unit) {
217 return dinfo;
218 }
219 }
220
221 return NULL;
222 }
223
224 bool drive_check_orphaned(void)
225 {
226 BlockBackend *blk;
227 DriveInfo *dinfo;
228 bool rs = false;
229
230 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
231 dinfo = blk_legacy_dinfo(blk);
232 /* If dinfo->bdrv->dev is NULL, it has no device attached. */
233 /* Unless this is a default drive, this may be an oversight. */
234 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
235 dinfo->type != IF_NONE) {
236 fprintf(stderr, "Warning: Orphaned drive without device: "
237 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
238 blk_name(blk), blk_bs(blk) ? blk_bs(blk)->filename : "",
239 if_name[dinfo->type], dinfo->bus, dinfo->unit);
240 rs = true;
241 }
242 }
243
244 return rs;
245 }
246
247 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
248 {
249 return drive_get(type,
250 drive_index_to_bus_id(type, index),
251 drive_index_to_unit_id(type, index));
252 }
253
254 int drive_get_max_bus(BlockInterfaceType type)
255 {
256 int max_bus;
257 BlockBackend *blk;
258 DriveInfo *dinfo;
259
260 max_bus = -1;
261 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
262 dinfo = blk_legacy_dinfo(blk);
263 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
264 max_bus = dinfo->bus;
265 }
266 }
267 return max_bus;
268 }
269
270 /* Get a block device. This should only be used for single-drive devices
271 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
272 appropriate bus. */
273 DriveInfo *drive_get_next(BlockInterfaceType type)
274 {
275 static int next_block_unit[IF_COUNT];
276
277 return drive_get(type, 0, next_block_unit[type]++);
278 }
279
280 static void bdrv_format_print(void *opaque, const char *name)
281 {
282 error_printf(" %s", name);
283 }
284
285 typedef struct {
286 QEMUBH *bh;
287 BlockDriverState *bs;
288 } BDRVPutRefBH;
289
290 static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
291 {
292 if (!strcmp(buf, "ignore")) {
293 return BLOCKDEV_ON_ERROR_IGNORE;
294 } else if (!is_read && !strcmp(buf, "enospc")) {
295 return BLOCKDEV_ON_ERROR_ENOSPC;
296 } else if (!strcmp(buf, "stop")) {
297 return BLOCKDEV_ON_ERROR_STOP;
298 } else if (!strcmp(buf, "report")) {
299 return BLOCKDEV_ON_ERROR_REPORT;
300 } else {
301 error_setg(errp, "'%s' invalid %s error action",
302 buf, is_read ? "read" : "write");
303 return -1;
304 }
305 }
306
307 static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
308 Error **errp)
309 {
310 const QListEntry *entry;
311 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
312 switch (qobject_type(entry->value)) {
313
314 case QTYPE_QSTRING: {
315 unsigned long long length;
316 const char *str = qstring_get_str(qobject_to_qstring(entry->value));
317 if (parse_uint_full(str, &length, 10) == 0 &&
318 length > 0 && length <= UINT_MAX) {
319 block_acct_add_interval(stats, (unsigned) length);
320 } else {
321 error_setg(errp, "Invalid interval length: %s", str);
322 return false;
323 }
324 break;
325 }
326
327 case QTYPE_QINT: {
328 int64_t length = qint_get_int(qobject_to_qint(entry->value));
329 if (length > 0 && length <= UINT_MAX) {
330 block_acct_add_interval(stats, (unsigned) length);
331 } else {
332 error_setg(errp, "Invalid interval length: %" PRId64, length);
333 return false;
334 }
335 break;
336 }
337
338 default:
339 error_setg(errp, "The specification of stats-intervals is invalid");
340 return false;
341 }
342 }
343 return true;
344 }
345
346 typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
347
348 /* All parameters but @opts are optional and may be set to NULL. */
349 static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
350 const char **throttling_group, ThrottleConfig *throttle_cfg,
351 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
352 {
353 const char *discard;
354 Error *local_error = NULL;
355 const char *aio;
356
357 if (bdrv_flags) {
358 if (!qemu_opt_get_bool(opts, "read-only", false)) {
359 *bdrv_flags |= BDRV_O_RDWR;
360 }
361 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
362 *bdrv_flags |= BDRV_O_COPY_ON_READ;
363 }
364
365 if ((discard = qemu_opt_get(opts, "discard")) != NULL) {
366 if (bdrv_parse_discard_flags(discard, bdrv_flags) != 0) {
367 error_setg(errp, "Invalid discard option");
368 return;
369 }
370 }
371
372 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
373 if (!strcmp(aio, "native")) {
374 *bdrv_flags |= BDRV_O_NATIVE_AIO;
375 } else if (!strcmp(aio, "threads")) {
376 /* this is the default */
377 } else {
378 error_setg(errp, "invalid aio option");
379 return;
380 }
381 }
382 }
383
384 /* disk I/O throttling */
385 if (throttling_group) {
386 *throttling_group = qemu_opt_get(opts, "throttling.group");
387 }
388
389 if (throttle_cfg) {
390 throttle_config_init(throttle_cfg);
391 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
392 qemu_opt_get_number(opts, "throttling.bps-total", 0);
393 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
394 qemu_opt_get_number(opts, "throttling.bps-read", 0);
395 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
396 qemu_opt_get_number(opts, "throttling.bps-write", 0);
397 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
398 qemu_opt_get_number(opts, "throttling.iops-total", 0);
399 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
400 qemu_opt_get_number(opts, "throttling.iops-read", 0);
401 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
402 qemu_opt_get_number(opts, "throttling.iops-write", 0);
403
404 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
405 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
406 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
407 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
408 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
409 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
410 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
411 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
412 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
413 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
414 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
415 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
416
417 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
418 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
419 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
420 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
421 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
422 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
423 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
424 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
425 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
426 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
427 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
428 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
429
430 throttle_cfg->op_size =
431 qemu_opt_get_number(opts, "throttling.iops-size", 0);
432
433 if (!throttle_is_valid(throttle_cfg, errp)) {
434 return;
435 }
436 }
437
438 if (detect_zeroes) {
439 *detect_zeroes =
440 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
441 qemu_opt_get(opts, "detect-zeroes"),
442 BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
443 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
444 &local_error);
445 if (local_error) {
446 error_propagate(errp, local_error);
447 return;
448 }
449
450 if (bdrv_flags &&
451 *detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
452 !(*bdrv_flags & BDRV_O_UNMAP))
453 {
454 error_setg(errp, "setting detect-zeroes to unmap is not allowed "
455 "without setting discard operation to unmap");
456 return;
457 }
458 }
459 }
460
461 /* Takes the ownership of bs_opts */
462 static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
463 Error **errp)
464 {
465 const char *buf;
466 int bdrv_flags = 0;
467 int on_read_error, on_write_error;
468 bool account_invalid, account_failed;
469 BlockBackend *blk;
470 BlockDriverState *bs;
471 ThrottleConfig cfg;
472 int snapshot = 0;
473 Error *error = NULL;
474 QemuOpts *opts;
475 QDict *interval_dict = NULL;
476 QList *interval_list = NULL;
477 const char *id;
478 BlockdevDetectZeroesOptions detect_zeroes =
479 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
480 const char *throttling_group = NULL;
481
482 /* Check common options by copying from bs_opts to opts, all other options
483 * stay in bs_opts for processing by bdrv_open(). */
484 id = qdict_get_try_str(bs_opts, "id");
485 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
486 if (error) {
487 error_propagate(errp, error);
488 goto err_no_opts;
489 }
490
491 qemu_opts_absorb_qdict(opts, bs_opts, &error);
492 if (error) {
493 error_propagate(errp, error);
494 goto early_err;
495 }
496
497 if (id) {
498 qdict_del(bs_opts, "id");
499 }
500
501 /* extract parameters */
502 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
503
504 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
505 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
506
507 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
508 qdict_array_split(interval_dict, &interval_list);
509
510 if (qdict_size(interval_dict) != 0) {
511 error_setg(errp, "Invalid option stats-intervals.%s",
512 qdict_first(interval_dict)->key);
513 goto early_err;
514 }
515
516 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
517 &detect_zeroes, &error);
518 if (error) {
519 error_propagate(errp, error);
520 goto early_err;
521 }
522
523 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
524 if (is_help_option(buf)) {
525 error_printf("Supported formats:");
526 bdrv_iterate_format(bdrv_format_print, NULL);
527 error_printf("\n");
528 goto early_err;
529 }
530
531 if (qdict_haskey(bs_opts, "driver")) {
532 error_setg(errp, "Cannot specify both 'driver' and 'format'");
533 goto early_err;
534 }
535 qdict_put(bs_opts, "driver", qstring_from_str(buf));
536 }
537
538 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
539 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
540 on_write_error = parse_block_error_action(buf, 0, &error);
541 if (error) {
542 error_propagate(errp, error);
543 goto early_err;
544 }
545 }
546
547 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
548 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
549 on_read_error = parse_block_error_action(buf, 1, &error);
550 if (error) {
551 error_propagate(errp, error);
552 goto early_err;
553 }
554 }
555
556 if (snapshot) {
557 bdrv_flags |= BDRV_O_SNAPSHOT;
558 }
559
560 /* init */
561 if ((!file || !*file) && !qdict_size(bs_opts)) {
562 BlockBackendRootState *blk_rs;
563
564 blk = blk_new(qemu_opts_id(opts), errp);
565 if (!blk) {
566 goto early_err;
567 }
568
569 blk_rs = blk_get_root_state(blk);
570 blk_rs->open_flags = bdrv_flags;
571 blk_rs->read_only = !(bdrv_flags & BDRV_O_RDWR);
572 blk_rs->detect_zeroes = detect_zeroes;
573
574 if (throttle_enabled(&cfg)) {
575 if (!throttling_group) {
576 throttling_group = blk_name(blk);
577 }
578 blk_rs->throttle_group = g_strdup(throttling_group);
579 blk_rs->throttle_state = throttle_group_incref(throttling_group);
580 blk_rs->throttle_state->cfg = cfg;
581 }
582
583 QDECREF(bs_opts);
584 } else {
585 if (file && !*file) {
586 file = NULL;
587 }
588
589 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
590 * with other callers) rather than what we want as the real defaults.
591 * Apply the defaults here instead. */
592 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_WB, "on");
593 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
594 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
595
596 if (snapshot) {
597 /* always use cache=unsafe with snapshot */
598 qdict_put(bs_opts, BDRV_OPT_CACHE_WB, qstring_from_str("on"));
599 qdict_put(bs_opts, BDRV_OPT_CACHE_DIRECT, qstring_from_str("off"));
600 qdict_put(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, qstring_from_str("on"));
601 }
602
603 if (runstate_check(RUN_STATE_INMIGRATE)) {
604 bdrv_flags |= BDRV_O_INACTIVE;
605 }
606
607 blk = blk_new_open(qemu_opts_id(opts), file, NULL, bs_opts, bdrv_flags,
608 errp);
609 if (!blk) {
610 goto err_no_bs_opts;
611 }
612 bs = blk_bs(blk);
613
614 bs->detect_zeroes = detect_zeroes;
615
616 /* disk I/O throttling */
617 if (throttle_enabled(&cfg)) {
618 if (!throttling_group) {
619 throttling_group = blk_name(blk);
620 }
621 bdrv_io_limits_enable(bs, throttling_group);
622 bdrv_set_io_limits(bs, &cfg);
623 }
624
625 if (bdrv_key_required(bs)) {
626 autostart = 0;
627 }
628
629 block_acct_init(blk_get_stats(blk), account_invalid, account_failed);
630
631 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
632 blk_unref(blk);
633 blk = NULL;
634 goto err_no_bs_opts;
635 }
636 }
637
638 blk_set_on_error(blk, on_read_error, on_write_error);
639
640 err_no_bs_opts:
641 qemu_opts_del(opts);
642 QDECREF(interval_dict);
643 QDECREF(interval_list);
644 return blk;
645
646 early_err:
647 qemu_opts_del(opts);
648 QDECREF(interval_dict);
649 QDECREF(interval_list);
650 err_no_opts:
651 QDECREF(bs_opts);
652 return NULL;
653 }
654
655 static QemuOptsList qemu_root_bds_opts;
656
657 /* Takes the ownership of bs_opts */
658 static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
659 {
660 BlockDriverState *bs;
661 QemuOpts *opts;
662 Error *local_error = NULL;
663 BlockdevDetectZeroesOptions detect_zeroes;
664 int ret;
665 int bdrv_flags = 0;
666
667 opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp);
668 if (!opts) {
669 goto fail;
670 }
671
672 qemu_opts_absorb_qdict(opts, bs_opts, &local_error);
673 if (local_error) {
674 error_propagate(errp, local_error);
675 goto fail;
676 }
677
678 extract_common_blockdev_options(opts, &bdrv_flags, NULL, NULL,
679 &detect_zeroes, &local_error);
680 if (local_error) {
681 error_propagate(errp, local_error);
682 goto fail;
683 }
684
685 if (runstate_check(RUN_STATE_INMIGRATE)) {
686 bdrv_flags |= BDRV_O_INACTIVE;
687 }
688
689 bs = NULL;
690 ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, errp);
691 if (ret < 0) {
692 goto fail_no_bs_opts;
693 }
694
695 bs->detect_zeroes = detect_zeroes;
696
697 fail_no_bs_opts:
698 qemu_opts_del(opts);
699 return bs;
700
701 fail:
702 qemu_opts_del(opts);
703 QDECREF(bs_opts);
704 return NULL;
705 }
706
707 void blockdev_close_all_bdrv_states(void)
708 {
709 BlockDriverState *bs, *next_bs;
710
711 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
712 AioContext *ctx = bdrv_get_aio_context(bs);
713
714 aio_context_acquire(ctx);
715 bdrv_unref(bs);
716 aio_context_release(ctx);
717 }
718 }
719
720 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
721 Error **errp)
722 {
723 const char *value;
724
725 value = qemu_opt_get(opts, from);
726 if (value) {
727 if (qemu_opt_find(opts, to)) {
728 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
729 "same time", to, from);
730 return;
731 }
732 }
733
734 /* rename all items in opts */
735 while ((value = qemu_opt_get(opts, from))) {
736 qemu_opt_set(opts, to, value, &error_abort);
737 qemu_opt_unset(opts, from);
738 }
739 }
740
741 QemuOptsList qemu_legacy_drive_opts = {
742 .name = "drive",
743 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
744 .desc = {
745 {
746 .name = "bus",
747 .type = QEMU_OPT_NUMBER,
748 .help = "bus number",
749 },{
750 .name = "unit",
751 .type = QEMU_OPT_NUMBER,
752 .help = "unit number (i.e. lun for scsi)",
753 },{
754 .name = "index",
755 .type = QEMU_OPT_NUMBER,
756 .help = "index number",
757 },{
758 .name = "media",
759 .type = QEMU_OPT_STRING,
760 .help = "media type (disk, cdrom)",
761 },{
762 .name = "if",
763 .type = QEMU_OPT_STRING,
764 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
765 },{
766 .name = "cyls",
767 .type = QEMU_OPT_NUMBER,
768 .help = "number of cylinders (ide disk geometry)",
769 },{
770 .name = "heads",
771 .type = QEMU_OPT_NUMBER,
772 .help = "number of heads (ide disk geometry)",
773 },{
774 .name = "secs",
775 .type = QEMU_OPT_NUMBER,
776 .help = "number of sectors (ide disk geometry)",
777 },{
778 .name = "trans",
779 .type = QEMU_OPT_STRING,
780 .help = "chs translation (auto, lba, none)",
781 },{
782 .name = "boot",
783 .type = QEMU_OPT_BOOL,
784 .help = "(deprecated, ignored)",
785 },{
786 .name = "addr",
787 .type = QEMU_OPT_STRING,
788 .help = "pci address (virtio only)",
789 },{
790 .name = "serial",
791 .type = QEMU_OPT_STRING,
792 .help = "disk serial number",
793 },{
794 .name = "file",
795 .type = QEMU_OPT_STRING,
796 .help = "file name",
797 },
798
799 /* Options that are passed on, but have special semantics with -drive */
800 {
801 .name = "read-only",
802 .type = QEMU_OPT_BOOL,
803 .help = "open drive file as read-only",
804 },{
805 .name = "rerror",
806 .type = QEMU_OPT_STRING,
807 .help = "read error action",
808 },{
809 .name = "werror",
810 .type = QEMU_OPT_STRING,
811 .help = "write error action",
812 },{
813 .name = "copy-on-read",
814 .type = QEMU_OPT_BOOL,
815 .help = "copy read data from backing file into image file",
816 },
817
818 { /* end of list */ }
819 },
820 };
821
822 DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
823 {
824 const char *value;
825 BlockBackend *blk;
826 DriveInfo *dinfo = NULL;
827 QDict *bs_opts;
828 QemuOpts *legacy_opts;
829 DriveMediaType media = MEDIA_DISK;
830 BlockInterfaceType type;
831 int cyls, heads, secs, translation;
832 int max_devs, bus_id, unit_id, index;
833 const char *devaddr;
834 const char *werror, *rerror;
835 bool read_only = false;
836 bool copy_on_read;
837 const char *serial;
838 const char *filename;
839 Error *local_err = NULL;
840 int i;
841
842 /* Change legacy command line options into QMP ones */
843 static const struct {
844 const char *from;
845 const char *to;
846 } opt_renames[] = {
847 { "iops", "throttling.iops-total" },
848 { "iops_rd", "throttling.iops-read" },
849 { "iops_wr", "throttling.iops-write" },
850
851 { "bps", "throttling.bps-total" },
852 { "bps_rd", "throttling.bps-read" },
853 { "bps_wr", "throttling.bps-write" },
854
855 { "iops_max", "throttling.iops-total-max" },
856 { "iops_rd_max", "throttling.iops-read-max" },
857 { "iops_wr_max", "throttling.iops-write-max" },
858
859 { "bps_max", "throttling.bps-total-max" },
860 { "bps_rd_max", "throttling.bps-read-max" },
861 { "bps_wr_max", "throttling.bps-write-max" },
862
863 { "iops_size", "throttling.iops-size" },
864
865 { "group", "throttling.group" },
866
867 { "readonly", "read-only" },
868 };
869
870 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
871 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
872 &local_err);
873 if (local_err) {
874 error_report_err(local_err);
875 return NULL;
876 }
877 }
878
879 value = qemu_opt_get(all_opts, "cache");
880 if (value) {
881 int flags = 0;
882
883 if (bdrv_parse_cache_flags(value, &flags) != 0) {
884 error_report("invalid cache option");
885 return NULL;
886 }
887
888 /* Specific options take precedence */
889 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
890 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
891 !!(flags & BDRV_O_CACHE_WB), &error_abort);
892 }
893 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
894 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
895 !!(flags & BDRV_O_NOCACHE), &error_abort);
896 }
897 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
898 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
899 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
900 }
901 qemu_opt_unset(all_opts, "cache");
902 }
903
904 /* Get a QDict for processing the options */
905 bs_opts = qdict_new();
906 qemu_opts_to_qdict(all_opts, bs_opts);
907
908 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
909 &error_abort);
910 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
911 if (local_err) {
912 error_report_err(local_err);
913 goto fail;
914 }
915
916 /* Deprecated option boot=[on|off] */
917 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
918 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
919 "ignored. Future versions will reject this parameter. Please "
920 "update your scripts.\n");
921 }
922
923 /* Media type */
924 value = qemu_opt_get(legacy_opts, "media");
925 if (value) {
926 if (!strcmp(value, "disk")) {
927 media = MEDIA_DISK;
928 } else if (!strcmp(value, "cdrom")) {
929 media = MEDIA_CDROM;
930 read_only = true;
931 } else {
932 error_report("'%s' invalid media", value);
933 goto fail;
934 }
935 }
936
937 /* copy-on-read is disabled with a warning for read-only devices */
938 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
939 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
940
941 if (read_only && copy_on_read) {
942 error_report("warning: disabling copy-on-read on read-only drive");
943 copy_on_read = false;
944 }
945
946 qdict_put(bs_opts, "read-only",
947 qstring_from_str(read_only ? "on" : "off"));
948 qdict_put(bs_opts, "copy-on-read",
949 qstring_from_str(copy_on_read ? "on" :"off"));
950
951 /* Controller type */
952 value = qemu_opt_get(legacy_opts, "if");
953 if (value) {
954 for (type = 0;
955 type < IF_COUNT && strcmp(value, if_name[type]);
956 type++) {
957 }
958 if (type == IF_COUNT) {
959 error_report("unsupported bus type '%s'", value);
960 goto fail;
961 }
962 } else {
963 type = block_default_type;
964 }
965
966 /* Geometry */
967 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
968 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
969 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
970
971 if (cyls || heads || secs) {
972 if (cyls < 1) {
973 error_report("invalid physical cyls number");
974 goto fail;
975 }
976 if (heads < 1) {
977 error_report("invalid physical heads number");
978 goto fail;
979 }
980 if (secs < 1) {
981 error_report("invalid physical secs number");
982 goto fail;
983 }
984 }
985
986 translation = BIOS_ATA_TRANSLATION_AUTO;
987 value = qemu_opt_get(legacy_opts, "trans");
988 if (value != NULL) {
989 if (!cyls) {
990 error_report("'%s' trans must be used with cyls, heads and secs",
991 value);
992 goto fail;
993 }
994 if (!strcmp(value, "none")) {
995 translation = BIOS_ATA_TRANSLATION_NONE;
996 } else if (!strcmp(value, "lba")) {
997 translation = BIOS_ATA_TRANSLATION_LBA;
998 } else if (!strcmp(value, "large")) {
999 translation = BIOS_ATA_TRANSLATION_LARGE;
1000 } else if (!strcmp(value, "rechs")) {
1001 translation = BIOS_ATA_TRANSLATION_RECHS;
1002 } else if (!strcmp(value, "auto")) {
1003 translation = BIOS_ATA_TRANSLATION_AUTO;
1004 } else {
1005 error_report("'%s' invalid translation type", value);
1006 goto fail;
1007 }
1008 }
1009
1010 if (media == MEDIA_CDROM) {
1011 if (cyls || secs || heads) {
1012 error_report("CHS can't be set with media=cdrom");
1013 goto fail;
1014 }
1015 }
1016
1017 /* Device address specified by bus/unit or index.
1018 * If none was specified, try to find the first free one. */
1019 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
1020 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
1021 index = qemu_opt_get_number(legacy_opts, "index", -1);
1022
1023 max_devs = if_max_devs[type];
1024
1025 if (index != -1) {
1026 if (bus_id != 0 || unit_id != -1) {
1027 error_report("index cannot be used with bus and unit");
1028 goto fail;
1029 }
1030 bus_id = drive_index_to_bus_id(type, index);
1031 unit_id = drive_index_to_unit_id(type, index);
1032 }
1033
1034 if (unit_id == -1) {
1035 unit_id = 0;
1036 while (drive_get(type, bus_id, unit_id) != NULL) {
1037 unit_id++;
1038 if (max_devs && unit_id >= max_devs) {
1039 unit_id -= max_devs;
1040 bus_id++;
1041 }
1042 }
1043 }
1044
1045 if (max_devs && unit_id >= max_devs) {
1046 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
1047 goto fail;
1048 }
1049
1050 if (drive_get(type, bus_id, unit_id) != NULL) {
1051 error_report("drive with bus=%d, unit=%d (index=%d) exists",
1052 bus_id, unit_id, index);
1053 goto fail;
1054 }
1055
1056 /* Serial number */
1057 serial = qemu_opt_get(legacy_opts, "serial");
1058
1059 /* no id supplied -> create one */
1060 if (qemu_opts_id(all_opts) == NULL) {
1061 char *new_id;
1062 const char *mediastr = "";
1063 if (type == IF_IDE || type == IF_SCSI) {
1064 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
1065 }
1066 if (max_devs) {
1067 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
1068 mediastr, unit_id);
1069 } else {
1070 new_id = g_strdup_printf("%s%s%i", if_name[type],
1071 mediastr, unit_id);
1072 }
1073 qdict_put(bs_opts, "id", qstring_from_str(new_id));
1074 g_free(new_id);
1075 }
1076
1077 /* Add virtio block device */
1078 devaddr = qemu_opt_get(legacy_opts, "addr");
1079 if (devaddr && type != IF_VIRTIO) {
1080 error_report("addr is not supported by this bus type");
1081 goto fail;
1082 }
1083
1084 if (type == IF_VIRTIO) {
1085 QemuOpts *devopts;
1086 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
1087 &error_abort);
1088 if (arch_type == QEMU_ARCH_S390X) {
1089 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
1090 } else {
1091 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
1092 }
1093 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
1094 &error_abort);
1095 if (devaddr) {
1096 qemu_opt_set(devopts, "addr", devaddr, &error_abort);
1097 }
1098 }
1099
1100 filename = qemu_opt_get(legacy_opts, "file");
1101
1102 /* Check werror/rerror compatibility with if=... */
1103 werror = qemu_opt_get(legacy_opts, "werror");
1104 if (werror != NULL) {
1105 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
1106 type != IF_NONE) {
1107 error_report("werror is not supported by this bus type");
1108 goto fail;
1109 }
1110 qdict_put(bs_opts, "werror", qstring_from_str(werror));
1111 }
1112
1113 rerror = qemu_opt_get(legacy_opts, "rerror");
1114 if (rerror != NULL) {
1115 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
1116 type != IF_NONE) {
1117 error_report("rerror is not supported by this bus type");
1118 goto fail;
1119 }
1120 qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
1121 }
1122
1123 /* Actual block device init: Functionality shared with blockdev-add */
1124 blk = blockdev_init(filename, bs_opts, &local_err);
1125 bs_opts = NULL;
1126 if (!blk) {
1127 if (local_err) {
1128 error_report_err(local_err);
1129 }
1130 goto fail;
1131 } else {
1132 assert(!local_err);
1133 }
1134
1135 /* Create legacy DriveInfo */
1136 dinfo = g_malloc0(sizeof(*dinfo));
1137 dinfo->opts = all_opts;
1138
1139 dinfo->cyls = cyls;
1140 dinfo->heads = heads;
1141 dinfo->secs = secs;
1142 dinfo->trans = translation;
1143
1144 dinfo->type = type;
1145 dinfo->bus = bus_id;
1146 dinfo->unit = unit_id;
1147 dinfo->devaddr = devaddr;
1148 dinfo->serial = g_strdup(serial);
1149
1150 blk_set_legacy_dinfo(blk, dinfo);
1151
1152 switch(type) {
1153 case IF_IDE:
1154 case IF_SCSI:
1155 case IF_XEN:
1156 case IF_NONE:
1157 dinfo->media_cd = media == MEDIA_CDROM;
1158 break;
1159 default:
1160 break;
1161 }
1162
1163 fail:
1164 qemu_opts_del(legacy_opts);
1165 QDECREF(bs_opts);
1166 return dinfo;
1167 }
1168
1169 void hmp_commit(Monitor *mon, const QDict *qdict)
1170 {
1171 const char *device = qdict_get_str(qdict, "device");
1172 BlockBackend *blk;
1173 int ret;
1174
1175 if (!strcmp(device, "all")) {
1176 ret = bdrv_commit_all();
1177 } else {
1178 BlockDriverState *bs;
1179 AioContext *aio_context;
1180
1181 blk = blk_by_name(device);
1182 if (!blk) {
1183 monitor_printf(mon, "Device '%s' not found\n", device);
1184 return;
1185 }
1186 if (!blk_is_available(blk)) {
1187 monitor_printf(mon, "Device '%s' has no medium\n", device);
1188 return;
1189 }
1190
1191 bs = blk_bs(blk);
1192 aio_context = bdrv_get_aio_context(bs);
1193 aio_context_acquire(aio_context);
1194
1195 ret = bdrv_commit(bs);
1196
1197 aio_context_release(aio_context);
1198 }
1199 if (ret < 0) {
1200 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1201 strerror(-ret));
1202 }
1203 }
1204
1205 static void blockdev_do_action(TransactionAction *action, Error **errp)
1206 {
1207 TransactionActionList list;
1208
1209 list.value = action;
1210 list.next = NULL;
1211 qmp_transaction(&list, false, NULL, errp);
1212 }
1213
1214 void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1215 bool has_node_name, const char *node_name,
1216 const char *snapshot_file,
1217 bool has_snapshot_node_name,
1218 const char *snapshot_node_name,
1219 bool has_format, const char *format,
1220 bool has_mode, NewImageMode mode, Error **errp)
1221 {
1222 BlockdevSnapshotSync snapshot = {
1223 .has_device = has_device,
1224 .device = (char *) device,
1225 .has_node_name = has_node_name,
1226 .node_name = (char *) node_name,
1227 .snapshot_file = (char *) snapshot_file,
1228 .has_snapshot_node_name = has_snapshot_node_name,
1229 .snapshot_node_name = (char *) snapshot_node_name,
1230 .has_format = has_format,
1231 .format = (char *) format,
1232 .has_mode = has_mode,
1233 .mode = mode,
1234 };
1235 TransactionAction action = {
1236 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
1237 .u.blockdev_snapshot_sync = &snapshot,
1238 };
1239 blockdev_do_action(&action, errp);
1240 }
1241
1242 void qmp_blockdev_snapshot(const char *node, const char *overlay,
1243 Error **errp)
1244 {
1245 BlockdevSnapshot snapshot_data = {
1246 .node = (char *) node,
1247 .overlay = (char *) overlay
1248 };
1249 TransactionAction action = {
1250 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
1251 .u.blockdev_snapshot = &snapshot_data,
1252 };
1253 blockdev_do_action(&action, errp);
1254 }
1255
1256 void qmp_blockdev_snapshot_internal_sync(const char *device,
1257 const char *name,
1258 Error **errp)
1259 {
1260 BlockdevSnapshotInternal snapshot = {
1261 .device = (char *) device,
1262 .name = (char *) name
1263 };
1264 TransactionAction action = {
1265 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
1266 .u.blockdev_snapshot_internal_sync = &snapshot,
1267 };
1268 blockdev_do_action(&action, errp);
1269 }
1270
1271 SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1272 bool has_id,
1273 const char *id,
1274 bool has_name,
1275 const char *name,
1276 Error **errp)
1277 {
1278 BlockDriverState *bs;
1279 BlockBackend *blk;
1280 AioContext *aio_context;
1281 QEMUSnapshotInfo sn;
1282 Error *local_err = NULL;
1283 SnapshotInfo *info = NULL;
1284 int ret;
1285
1286 blk = blk_by_name(device);
1287 if (!blk) {
1288 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1289 "Device '%s' not found", device);
1290 return NULL;
1291 }
1292
1293 aio_context = blk_get_aio_context(blk);
1294 aio_context_acquire(aio_context);
1295
1296 if (!has_id) {
1297 id = NULL;
1298 }
1299
1300 if (!has_name) {
1301 name = NULL;
1302 }
1303
1304 if (!id && !name) {
1305 error_setg(errp, "Name or id must be provided");
1306 goto out_aio_context;
1307 }
1308
1309 if (!blk_is_available(blk)) {
1310 error_setg(errp, "Device '%s' has no medium", device);
1311 goto out_aio_context;
1312 }
1313 bs = blk_bs(blk);
1314
1315 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1316 goto out_aio_context;
1317 }
1318
1319 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
1320 if (local_err) {
1321 error_propagate(errp, local_err);
1322 goto out_aio_context;
1323 }
1324 if (!ret) {
1325 error_setg(errp,
1326 "Snapshot with id '%s' and name '%s' does not exist on "
1327 "device '%s'",
1328 STR_OR_NULL(id), STR_OR_NULL(name), device);
1329 goto out_aio_context;
1330 }
1331
1332 bdrv_snapshot_delete(bs, id, name, &local_err);
1333 if (local_err) {
1334 error_propagate(errp, local_err);
1335 goto out_aio_context;
1336 }
1337
1338 aio_context_release(aio_context);
1339
1340 info = g_new0(SnapshotInfo, 1);
1341 info->id = g_strdup(sn.id_str);
1342 info->name = g_strdup(sn.name);
1343 info->date_nsec = sn.date_nsec;
1344 info->date_sec = sn.date_sec;
1345 info->vm_state_size = sn.vm_state_size;
1346 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1347 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1348
1349 return info;
1350
1351 out_aio_context:
1352 aio_context_release(aio_context);
1353 return NULL;
1354 }
1355
1356 /**
1357 * block_dirty_bitmap_lookup:
1358 * Return a dirty bitmap (if present), after validating
1359 * the node reference and bitmap names.
1360 *
1361 * @node: The name of the BDS node to search for bitmaps
1362 * @name: The name of the bitmap to search for
1363 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1364 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1365 * @errp: Output pointer for error information. Can be NULL.
1366 *
1367 * @return: A bitmap object on success, or NULL on failure.
1368 */
1369 static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1370 const char *name,
1371 BlockDriverState **pbs,
1372 AioContext **paio,
1373 Error **errp)
1374 {
1375 BlockDriverState *bs;
1376 BdrvDirtyBitmap *bitmap;
1377 AioContext *aio_context;
1378
1379 if (!node) {
1380 error_setg(errp, "Node cannot be NULL");
1381 return NULL;
1382 }
1383 if (!name) {
1384 error_setg(errp, "Bitmap name cannot be NULL");
1385 return NULL;
1386 }
1387 bs = bdrv_lookup_bs(node, node, NULL);
1388 if (!bs) {
1389 error_setg(errp, "Node '%s' not found", node);
1390 return NULL;
1391 }
1392
1393 aio_context = bdrv_get_aio_context(bs);
1394 aio_context_acquire(aio_context);
1395
1396 bitmap = bdrv_find_dirty_bitmap(bs, name);
1397 if (!bitmap) {
1398 error_setg(errp, "Dirty bitmap '%s' not found", name);
1399 goto fail;
1400 }
1401
1402 if (pbs) {
1403 *pbs = bs;
1404 }
1405 if (paio) {
1406 *paio = aio_context;
1407 } else {
1408 aio_context_release(aio_context);
1409 }
1410
1411 return bitmap;
1412
1413 fail:
1414 aio_context_release(aio_context);
1415 return NULL;
1416 }
1417
1418 /* New and old BlockDriverState structs for atomic group operations */
1419
1420 typedef struct BlkActionState BlkActionState;
1421
1422 /**
1423 * BlkActionOps:
1424 * Table of operations that define an Action.
1425 *
1426 * @instance_size: Size of state struct, in bytes.
1427 * @prepare: Prepare the work, must NOT be NULL.
1428 * @commit: Commit the changes, can be NULL.
1429 * @abort: Abort the changes on fail, can be NULL.
1430 * @clean: Clean up resources after all transaction actions have called
1431 * commit() or abort(). Can be NULL.
1432 *
1433 * Only prepare() may fail. In a single transaction, only one of commit() or
1434 * abort() will be called. clean() will always be called if it is present.
1435 */
1436 typedef struct BlkActionOps {
1437 size_t instance_size;
1438 void (*prepare)(BlkActionState *common, Error **errp);
1439 void (*commit)(BlkActionState *common);
1440 void (*abort)(BlkActionState *common);
1441 void (*clean)(BlkActionState *common);
1442 } BlkActionOps;
1443
1444 /**
1445 * BlkActionState:
1446 * Describes one Action's state within a Transaction.
1447 *
1448 * @action: QAPI-defined enum identifying which Action to perform.
1449 * @ops: Table of ActionOps this Action can perform.
1450 * @block_job_txn: Transaction which this action belongs to.
1451 * @entry: List membership for all Actions in this Transaction.
1452 *
1453 * This structure must be arranged as first member in a subclassed type,
1454 * assuming that the compiler will also arrange it to the same offsets as the
1455 * base class.
1456 */
1457 struct BlkActionState {
1458 TransactionAction *action;
1459 const BlkActionOps *ops;
1460 BlockJobTxn *block_job_txn;
1461 TransactionProperties *txn_props;
1462 QSIMPLEQ_ENTRY(BlkActionState) entry;
1463 };
1464
1465 /* internal snapshot private data */
1466 typedef struct InternalSnapshotState {
1467 BlkActionState common;
1468 BlockDriverState *bs;
1469 AioContext *aio_context;
1470 QEMUSnapshotInfo sn;
1471 bool created;
1472 } InternalSnapshotState;
1473
1474
1475 static int action_check_completion_mode(BlkActionState *s, Error **errp)
1476 {
1477 if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
1478 error_setg(errp,
1479 "Action '%s' does not support Transaction property "
1480 "completion-mode = %s",
1481 TransactionActionKind_lookup[s->action->type],
1482 ActionCompletionMode_lookup[s->txn_props->completion_mode]);
1483 return -1;
1484 }
1485 return 0;
1486 }
1487
1488 static void internal_snapshot_prepare(BlkActionState *common,
1489 Error **errp)
1490 {
1491 Error *local_err = NULL;
1492 const char *device;
1493 const char *name;
1494 BlockBackend *blk;
1495 BlockDriverState *bs;
1496 QEMUSnapshotInfo old_sn, *sn;
1497 bool ret;
1498 qemu_timeval tv;
1499 BlockdevSnapshotInternal *internal;
1500 InternalSnapshotState *state;
1501 int ret1;
1502
1503 g_assert(common->action->type ==
1504 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
1505 internal = common->action->u.blockdev_snapshot_internal_sync;
1506 state = DO_UPCAST(InternalSnapshotState, common, common);
1507
1508 /* 1. parse input */
1509 device = internal->device;
1510 name = internal->name;
1511
1512 /* 2. check for validation */
1513 if (action_check_completion_mode(common, errp) < 0) {
1514 return;
1515 }
1516
1517 blk = blk_by_name(device);
1518 if (!blk) {
1519 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1520 "Device '%s' not found", device);
1521 return;
1522 }
1523
1524 /* AioContext is released in .clean() */
1525 state->aio_context = blk_get_aio_context(blk);
1526 aio_context_acquire(state->aio_context);
1527
1528 if (!blk_is_available(blk)) {
1529 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1530 return;
1531 }
1532 bs = blk_bs(blk);
1533
1534 state->bs = bs;
1535 bdrv_drained_begin(bs);
1536
1537 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
1538 return;
1539 }
1540
1541 if (bdrv_is_read_only(bs)) {
1542 error_setg(errp, "Device '%s' is read only", device);
1543 return;
1544 }
1545
1546 if (!bdrv_can_snapshot(bs)) {
1547 error_setg(errp, "Block format '%s' used by device '%s' "
1548 "does not support internal snapshots",
1549 bs->drv->format_name, device);
1550 return;
1551 }
1552
1553 if (!strlen(name)) {
1554 error_setg(errp, "Name is empty");
1555 return;
1556 }
1557
1558 /* check whether a snapshot with name exist */
1559 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1560 &local_err);
1561 if (local_err) {
1562 error_propagate(errp, local_err);
1563 return;
1564 } else if (ret) {
1565 error_setg(errp,
1566 "Snapshot with name '%s' already exists on device '%s'",
1567 name, device);
1568 return;
1569 }
1570
1571 /* 3. take the snapshot */
1572 sn = &state->sn;
1573 pstrcpy(sn->name, sizeof(sn->name), name);
1574 qemu_gettimeofday(&tv);
1575 sn->date_sec = tv.tv_sec;
1576 sn->date_nsec = tv.tv_usec * 1000;
1577 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1578
1579 ret1 = bdrv_snapshot_create(bs, sn);
1580 if (ret1 < 0) {
1581 error_setg_errno(errp, -ret1,
1582 "Failed to create snapshot '%s' on device '%s'",
1583 name, device);
1584 return;
1585 }
1586
1587 /* 4. succeed, mark a snapshot is created */
1588 state->created = true;
1589 }
1590
1591 static void internal_snapshot_abort(BlkActionState *common)
1592 {
1593 InternalSnapshotState *state =
1594 DO_UPCAST(InternalSnapshotState, common, common);
1595 BlockDriverState *bs = state->bs;
1596 QEMUSnapshotInfo *sn = &state->sn;
1597 Error *local_error = NULL;
1598
1599 if (!state->created) {
1600 return;
1601 }
1602
1603 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
1604 error_reportf_err(local_error,
1605 "Failed to delete snapshot with id '%s' and "
1606 "name '%s' on device '%s' in abort: ",
1607 sn->id_str, sn->name,
1608 bdrv_get_device_name(bs));
1609 }
1610 }
1611
1612 static void internal_snapshot_clean(BlkActionState *common)
1613 {
1614 InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
1615 common, common);
1616
1617 if (state->aio_context) {
1618 if (state->bs) {
1619 bdrv_drained_end(state->bs);
1620 }
1621 aio_context_release(state->aio_context);
1622 }
1623 }
1624
1625 /* external snapshot private data */
1626 typedef struct ExternalSnapshotState {
1627 BlkActionState common;
1628 BlockDriverState *old_bs;
1629 BlockDriverState *new_bs;
1630 AioContext *aio_context;
1631 } ExternalSnapshotState;
1632
1633 static void external_snapshot_prepare(BlkActionState *common,
1634 Error **errp)
1635 {
1636 int flags = 0, ret;
1637 QDict *options = NULL;
1638 Error *local_err = NULL;
1639 /* Device and node name of the image to generate the snapshot from */
1640 const char *device;
1641 const char *node_name;
1642 /* Reference to the new image (for 'blockdev-snapshot') */
1643 const char *snapshot_ref;
1644 /* File name of the new image (for 'blockdev-snapshot-sync') */
1645 const char *new_image_file;
1646 ExternalSnapshotState *state =
1647 DO_UPCAST(ExternalSnapshotState, common, common);
1648 TransactionAction *action = common->action;
1649
1650 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1651 * purpose but a different set of parameters */
1652 switch (action->type) {
1653 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
1654 {
1655 BlockdevSnapshot *s = action->u.blockdev_snapshot;
1656 device = s->node;
1657 node_name = s->node;
1658 new_image_file = NULL;
1659 snapshot_ref = s->overlay;
1660 }
1661 break;
1662 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
1663 {
1664 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync;
1665 device = s->has_device ? s->device : NULL;
1666 node_name = s->has_node_name ? s->node_name : NULL;
1667 new_image_file = s->snapshot_file;
1668 snapshot_ref = NULL;
1669 }
1670 break;
1671 default:
1672 g_assert_not_reached();
1673 }
1674
1675 /* start processing */
1676 if (action_check_completion_mode(common, errp) < 0) {
1677 return;
1678 }
1679
1680 state->old_bs = bdrv_lookup_bs(device, node_name, errp);
1681 if (!state->old_bs) {
1682 return;
1683 }
1684
1685 /* Acquire AioContext now so any threads operating on old_bs stop */
1686 state->aio_context = bdrv_get_aio_context(state->old_bs);
1687 aio_context_acquire(state->aio_context);
1688 bdrv_drained_begin(state->old_bs);
1689
1690 if (!bdrv_is_inserted(state->old_bs)) {
1691 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1692 return;
1693 }
1694
1695 if (bdrv_op_is_blocked(state->old_bs,
1696 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
1697 return;
1698 }
1699
1700 if (!bdrv_is_read_only(state->old_bs)) {
1701 if (bdrv_flush(state->old_bs)) {
1702 error_setg(errp, QERR_IO_ERROR);
1703 return;
1704 }
1705 }
1706
1707 if (!bdrv_is_first_non_filter(state->old_bs)) {
1708 error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
1709 return;
1710 }
1711
1712 if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
1713 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync;
1714 const char *format = s->has_format ? s->format : "qcow2";
1715 enum NewImageMode mode;
1716 const char *snapshot_node_name =
1717 s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
1718
1719 if (node_name && !snapshot_node_name) {
1720 error_setg(errp, "New snapshot node name missing");
1721 return;
1722 }
1723
1724 if (snapshot_node_name &&
1725 bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
1726 error_setg(errp, "New snapshot node name already in use");
1727 return;
1728 }
1729
1730 flags = state->old_bs->open_flags;
1731
1732 /* create new image w/backing file */
1733 mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1734 if (mode != NEW_IMAGE_MODE_EXISTING) {
1735 bdrv_img_create(new_image_file, format,
1736 state->old_bs->filename,
1737 state->old_bs->drv->format_name,
1738 NULL, -1, flags, &local_err, false);
1739 if (local_err) {
1740 error_propagate(errp, local_err);
1741 return;
1742 }
1743 }
1744
1745 options = qdict_new();
1746 if (s->has_snapshot_node_name) {
1747 qdict_put(options, "node-name",
1748 qstring_from_str(snapshot_node_name));
1749 }
1750 qdict_put(options, "driver", qstring_from_str(format));
1751
1752 flags |= BDRV_O_NO_BACKING;
1753 }
1754
1755 assert(state->new_bs == NULL);
1756 ret = bdrv_open(&state->new_bs, new_image_file, snapshot_ref, options,
1757 flags, errp);
1758 /* We will manually add the backing_hd field to the bs later */
1759 if (ret != 0) {
1760 return;
1761 }
1762
1763 if (state->new_bs->blk != NULL) {
1764 error_setg(errp, "The snapshot is already in use by %s",
1765 blk_name(state->new_bs->blk));
1766 return;
1767 }
1768
1769 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1770 errp)) {
1771 return;
1772 }
1773
1774 if (state->new_bs->backing != NULL) {
1775 error_setg(errp, "The snapshot already has a backing image");
1776 return;
1777 }
1778
1779 if (!state->new_bs->drv->supports_backing) {
1780 error_setg(errp, "The snapshot does not support backing images");
1781 }
1782 }
1783
1784 static void external_snapshot_commit(BlkActionState *common)
1785 {
1786 ExternalSnapshotState *state =
1787 DO_UPCAST(ExternalSnapshotState, common, common);
1788
1789 bdrv_set_aio_context(state->new_bs, state->aio_context);
1790
1791 /* This removes our old bs and adds the new bs */
1792 bdrv_append(state->new_bs, state->old_bs);
1793 /* We don't need (or want) to use the transactional
1794 * bdrv_reopen_multiple() across all the entries at once, because we
1795 * don't want to abort all of them if one of them fails the reopen */
1796 bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
1797 NULL);
1798 }
1799
1800 static void external_snapshot_abort(BlkActionState *common)
1801 {
1802 ExternalSnapshotState *state =
1803 DO_UPCAST(ExternalSnapshotState, common, common);
1804 if (state->new_bs) {
1805 bdrv_unref(state->new_bs);
1806 }
1807 }
1808
1809 static void external_snapshot_clean(BlkActionState *common)
1810 {
1811 ExternalSnapshotState *state =
1812 DO_UPCAST(ExternalSnapshotState, common, common);
1813 if (state->aio_context) {
1814 bdrv_drained_end(state->old_bs);
1815 aio_context_release(state->aio_context);
1816 }
1817 }
1818
1819 typedef struct DriveBackupState {
1820 BlkActionState common;
1821 BlockDriverState *bs;
1822 AioContext *aio_context;
1823 BlockJob *job;
1824 } DriveBackupState;
1825
1826 static void do_drive_backup(const char *device, const char *target,
1827 bool has_format, const char *format,
1828 enum MirrorSyncMode sync,
1829 bool has_mode, enum NewImageMode mode,
1830 bool has_speed, int64_t speed,
1831 bool has_bitmap, const char *bitmap,
1832 bool has_on_source_error,
1833 BlockdevOnError on_source_error,
1834 bool has_on_target_error,
1835 BlockdevOnError on_target_error,
1836 BlockJobTxn *txn, Error **errp);
1837
1838 static void drive_backup_prepare(BlkActionState *common, Error **errp)
1839 {
1840 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1841 BlockBackend *blk;
1842 DriveBackup *backup;
1843 Error *local_err = NULL;
1844
1845 assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1846 backup = common->action->u.drive_backup;
1847
1848 blk = blk_by_name(backup->device);
1849 if (!blk) {
1850 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1851 "Device '%s' not found", backup->device);
1852 return;
1853 }
1854
1855 if (!blk_is_available(blk)) {
1856 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1857 return;
1858 }
1859
1860 /* AioContext is released in .clean() */
1861 state->aio_context = blk_get_aio_context(blk);
1862 aio_context_acquire(state->aio_context);
1863 bdrv_drained_begin(blk_bs(blk));
1864 state->bs = blk_bs(blk);
1865
1866 do_drive_backup(backup->device, backup->target,
1867 backup->has_format, backup->format,
1868 backup->sync,
1869 backup->has_mode, backup->mode,
1870 backup->has_speed, backup->speed,
1871 backup->has_bitmap, backup->bitmap,
1872 backup->has_on_source_error, backup->on_source_error,
1873 backup->has_on_target_error, backup->on_target_error,
1874 common->block_job_txn, &local_err);
1875 if (local_err) {
1876 error_propagate(errp, local_err);
1877 return;
1878 }
1879
1880 state->job = state->bs->job;
1881 }
1882
1883 static void drive_backup_abort(BlkActionState *common)
1884 {
1885 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1886 BlockDriverState *bs = state->bs;
1887
1888 /* Only cancel if it's the job we started */
1889 if (bs && bs->job && bs->job == state->job) {
1890 block_job_cancel_sync(bs->job);
1891 }
1892 }
1893
1894 static void drive_backup_clean(BlkActionState *common)
1895 {
1896 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1897
1898 if (state->aio_context) {
1899 bdrv_drained_end(state->bs);
1900 aio_context_release(state->aio_context);
1901 }
1902 }
1903
1904 typedef struct BlockdevBackupState {
1905 BlkActionState common;
1906 BlockDriverState *bs;
1907 BlockJob *job;
1908 AioContext *aio_context;
1909 } BlockdevBackupState;
1910
1911 static void do_blockdev_backup(const char *device, const char *target,
1912 enum MirrorSyncMode sync,
1913 bool has_speed, int64_t speed,
1914 bool has_on_source_error,
1915 BlockdevOnError on_source_error,
1916 bool has_on_target_error,
1917 BlockdevOnError on_target_error,
1918 BlockJobTxn *txn, Error **errp);
1919
1920 static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
1921 {
1922 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1923 BlockdevBackup *backup;
1924 BlockBackend *blk, *target;
1925 Error *local_err = NULL;
1926
1927 assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
1928 backup = common->action->u.blockdev_backup;
1929
1930 blk = blk_by_name(backup->device);
1931 if (!blk) {
1932 error_setg(errp, "Device '%s' not found", backup->device);
1933 return;
1934 }
1935
1936 if (!blk_is_available(blk)) {
1937 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1938 return;
1939 }
1940
1941 target = blk_by_name(backup->target);
1942 if (!target) {
1943 error_setg(errp, "Device '%s' not found", backup->target);
1944 return;
1945 }
1946
1947 /* AioContext is released in .clean() */
1948 state->aio_context = blk_get_aio_context(blk);
1949 if (state->aio_context != blk_get_aio_context(target)) {
1950 state->aio_context = NULL;
1951 error_setg(errp, "Backup between two IO threads is not implemented");
1952 return;
1953 }
1954 aio_context_acquire(state->aio_context);
1955 state->bs = blk_bs(blk);
1956 bdrv_drained_begin(state->bs);
1957
1958 do_blockdev_backup(backup->device, backup->target,
1959 backup->sync,
1960 backup->has_speed, backup->speed,
1961 backup->has_on_source_error, backup->on_source_error,
1962 backup->has_on_target_error, backup->on_target_error,
1963 common->block_job_txn, &local_err);
1964 if (local_err) {
1965 error_propagate(errp, local_err);
1966 return;
1967 }
1968
1969 state->job = state->bs->job;
1970 }
1971
1972 static void blockdev_backup_abort(BlkActionState *common)
1973 {
1974 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1975 BlockDriverState *bs = state->bs;
1976
1977 /* Only cancel if it's the job we started */
1978 if (bs && bs->job && bs->job == state->job) {
1979 block_job_cancel_sync(bs->job);
1980 }
1981 }
1982
1983 static void blockdev_backup_clean(BlkActionState *common)
1984 {
1985 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1986
1987 if (state->aio_context) {
1988 bdrv_drained_end(state->bs);
1989 aio_context_release(state->aio_context);
1990 }
1991 }
1992
1993 typedef struct BlockDirtyBitmapState {
1994 BlkActionState common;
1995 BdrvDirtyBitmap *bitmap;
1996 BlockDriverState *bs;
1997 AioContext *aio_context;
1998 HBitmap *backup;
1999 bool prepared;
2000 } BlockDirtyBitmapState;
2001
2002 static void block_dirty_bitmap_add_prepare(BlkActionState *common,
2003 Error **errp)
2004 {
2005 Error *local_err = NULL;
2006 BlockDirtyBitmapAdd *action;
2007 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2008 common, common);
2009
2010 if (action_check_completion_mode(common, errp) < 0) {
2011 return;
2012 }
2013
2014 action = common->action->u.block_dirty_bitmap_add;
2015 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
2016 qmp_block_dirty_bitmap_add(action->node, action->name,
2017 action->has_granularity, action->granularity,
2018 &local_err);
2019
2020 if (!local_err) {
2021 state->prepared = true;
2022 } else {
2023 error_propagate(errp, local_err);
2024 }
2025 }
2026
2027 static void block_dirty_bitmap_add_abort(BlkActionState *common)
2028 {
2029 BlockDirtyBitmapAdd *action;
2030 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2031 common, common);
2032
2033 action = common->action->u.block_dirty_bitmap_add;
2034 /* Should not be able to fail: IF the bitmap was added via .prepare(),
2035 * then the node reference and bitmap name must have been valid.
2036 */
2037 if (state->prepared) {
2038 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
2039 }
2040 }
2041
2042 static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
2043 Error **errp)
2044 {
2045 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2046 common, common);
2047 BlockDirtyBitmap *action;
2048
2049 if (action_check_completion_mode(common, errp) < 0) {
2050 return;
2051 }
2052
2053 action = common->action->u.block_dirty_bitmap_clear;
2054 state->bitmap = block_dirty_bitmap_lookup(action->node,
2055 action->name,
2056 &state->bs,
2057 &state->aio_context,
2058 errp);
2059 if (!state->bitmap) {
2060 return;
2061 }
2062
2063 if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
2064 error_setg(errp, "Cannot modify a frozen bitmap");
2065 return;
2066 } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
2067 error_setg(errp, "Cannot clear a disabled bitmap");
2068 return;
2069 }
2070
2071 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
2072 /* AioContext is released in .clean() */
2073 }
2074
2075 static void block_dirty_bitmap_clear_abort(BlkActionState *common)
2076 {
2077 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2078 common, common);
2079
2080 bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
2081 }
2082
2083 static void block_dirty_bitmap_clear_commit(BlkActionState *common)
2084 {
2085 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2086 common, common);
2087
2088 hbitmap_free(state->backup);
2089 }
2090
2091 static void block_dirty_bitmap_clear_clean(BlkActionState *common)
2092 {
2093 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2094 common, common);
2095
2096 if (state->aio_context) {
2097 aio_context_release(state->aio_context);
2098 }
2099 }
2100
2101 static void abort_prepare(BlkActionState *common, Error **errp)
2102 {
2103 error_setg(errp, "Transaction aborted using Abort action");
2104 }
2105
2106 static void abort_commit(BlkActionState *common)
2107 {
2108 g_assert_not_reached(); /* this action never succeeds */
2109 }
2110
2111 static const BlkActionOps actions[] = {
2112 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2113 .instance_size = sizeof(ExternalSnapshotState),
2114 .prepare = external_snapshot_prepare,
2115 .commit = external_snapshot_commit,
2116 .abort = external_snapshot_abort,
2117 .clean = external_snapshot_clean,
2118 },
2119 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
2120 .instance_size = sizeof(ExternalSnapshotState),
2121 .prepare = external_snapshot_prepare,
2122 .commit = external_snapshot_commit,
2123 .abort = external_snapshot_abort,
2124 .clean = external_snapshot_clean,
2125 },
2126 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2127 .instance_size = sizeof(DriveBackupState),
2128 .prepare = drive_backup_prepare,
2129 .abort = drive_backup_abort,
2130 .clean = drive_backup_clean,
2131 },
2132 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2133 .instance_size = sizeof(BlockdevBackupState),
2134 .prepare = blockdev_backup_prepare,
2135 .abort = blockdev_backup_abort,
2136 .clean = blockdev_backup_clean,
2137 },
2138 [TRANSACTION_ACTION_KIND_ABORT] = {
2139 .instance_size = sizeof(BlkActionState),
2140 .prepare = abort_prepare,
2141 .commit = abort_commit,
2142 },
2143 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2144 .instance_size = sizeof(InternalSnapshotState),
2145 .prepare = internal_snapshot_prepare,
2146 .abort = internal_snapshot_abort,
2147 .clean = internal_snapshot_clean,
2148 },
2149 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2150 .instance_size = sizeof(BlockDirtyBitmapState),
2151 .prepare = block_dirty_bitmap_add_prepare,
2152 .abort = block_dirty_bitmap_add_abort,
2153 },
2154 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2155 .instance_size = sizeof(BlockDirtyBitmapState),
2156 .prepare = block_dirty_bitmap_clear_prepare,
2157 .commit = block_dirty_bitmap_clear_commit,
2158 .abort = block_dirty_bitmap_clear_abort,
2159 .clean = block_dirty_bitmap_clear_clean,
2160 }
2161 };
2162
2163 /**
2164 * Allocate a TransactionProperties structure if necessary, and fill
2165 * that structure with desired defaults if they are unset.
2166 */
2167 static TransactionProperties *get_transaction_properties(
2168 TransactionProperties *props)
2169 {
2170 if (!props) {
2171 props = g_new0(TransactionProperties, 1);
2172 }
2173
2174 if (!props->has_completion_mode) {
2175 props->has_completion_mode = true;
2176 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2177 }
2178
2179 return props;
2180 }
2181
2182 /*
2183 * 'Atomic' group operations. The operations are performed as a set, and if
2184 * any fail then we roll back all operations in the group.
2185 */
2186 void qmp_transaction(TransactionActionList *dev_list,
2187 bool has_props,
2188 struct TransactionProperties *props,
2189 Error **errp)
2190 {
2191 TransactionActionList *dev_entry = dev_list;
2192 BlockJobTxn *block_job_txn = NULL;
2193 BlkActionState *state, *next;
2194 Error *local_err = NULL;
2195
2196 QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
2197 QSIMPLEQ_INIT(&snap_bdrv_states);
2198
2199 /* Does this transaction get canceled as a group on failure?
2200 * If not, we don't really need to make a BlockJobTxn.
2201 */
2202 props = get_transaction_properties(props);
2203 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
2204 block_job_txn = block_job_txn_new();
2205 }
2206
2207 /* drain all i/o before any operations */
2208 bdrv_drain_all();
2209
2210 /* We don't do anything in this loop that commits us to the operations */
2211 while (NULL != dev_entry) {
2212 TransactionAction *dev_info = NULL;
2213 const BlkActionOps *ops;
2214
2215 dev_info = dev_entry->value;
2216 dev_entry = dev_entry->next;
2217
2218 assert(dev_info->type < ARRAY_SIZE(actions));
2219
2220 ops = &actions[dev_info->type];
2221 assert(ops->instance_size > 0);
2222
2223 state = g_malloc0(ops->instance_size);
2224 state->ops = ops;
2225 state->action = dev_info;
2226 state->block_job_txn = block_job_txn;
2227 state->txn_props = props;
2228 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
2229
2230 state->ops->prepare(state, &local_err);
2231 if (local_err) {
2232 error_propagate(errp, local_err);
2233 goto delete_and_fail;
2234 }
2235 }
2236
2237 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2238 if (state->ops->commit) {
2239 state->ops->commit(state);
2240 }
2241 }
2242
2243 /* success */
2244 goto exit;
2245
2246 delete_and_fail:
2247 /* failure, and it is all-or-none; roll back all operations */
2248 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2249 if (state->ops->abort) {
2250 state->ops->abort(state);
2251 }
2252 }
2253 exit:
2254 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
2255 if (state->ops->clean) {
2256 state->ops->clean(state);
2257 }
2258 g_free(state);
2259 }
2260 if (!has_props) {
2261 qapi_free_TransactionProperties(props);
2262 }
2263 block_job_txn_unref(block_job_txn);
2264 }
2265
2266 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
2267 {
2268 Error *local_err = NULL;
2269
2270 qmp_blockdev_open_tray(device, has_force, force, &local_err);
2271 if (local_err) {
2272 error_propagate(errp, local_err);
2273 return;
2274 }
2275
2276 qmp_x_blockdev_remove_medium(device, errp);
2277 }
2278
2279 void qmp_block_passwd(bool has_device, const char *device,
2280 bool has_node_name, const char *node_name,
2281 const char *password, Error **errp)
2282 {
2283 Error *local_err = NULL;
2284 BlockDriverState *bs;
2285 AioContext *aio_context;
2286
2287 bs = bdrv_lookup_bs(has_device ? device : NULL,
2288 has_node_name ? node_name : NULL,
2289 &local_err);
2290 if (local_err) {
2291 error_propagate(errp, local_err);
2292 return;
2293 }
2294
2295 aio_context = bdrv_get_aio_context(bs);
2296 aio_context_acquire(aio_context);
2297
2298 bdrv_add_key(bs, password, errp);
2299
2300 aio_context_release(aio_context);
2301 }
2302
2303 void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
2304 Error **errp)
2305 {
2306 BlockBackend *blk;
2307 bool locked;
2308
2309 if (!has_force) {
2310 force = false;
2311 }
2312
2313 blk = blk_by_name(device);
2314 if (!blk) {
2315 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2316 "Device '%s' not found", device);
2317 return;
2318 }
2319
2320 if (!blk_dev_has_removable_media(blk)) {
2321 error_setg(errp, "Device '%s' is not removable", device);
2322 return;
2323 }
2324
2325 if (!blk_dev_has_tray(blk)) {
2326 /* Ignore this command on tray-less devices */
2327 return;
2328 }
2329
2330 if (blk_dev_is_tray_open(blk)) {
2331 return;
2332 }
2333
2334 locked = blk_dev_is_medium_locked(blk);
2335 if (locked) {
2336 blk_dev_eject_request(blk, force);
2337 }
2338
2339 if (!locked || force) {
2340 blk_dev_change_media_cb(blk, false);
2341 }
2342 }
2343
2344 void qmp_blockdev_close_tray(const char *device, Error **errp)
2345 {
2346 BlockBackend *blk;
2347
2348 blk = blk_by_name(device);
2349 if (!blk) {
2350 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2351 "Device '%s' not found", device);
2352 return;
2353 }
2354
2355 if (!blk_dev_has_removable_media(blk)) {
2356 error_setg(errp, "Device '%s' is not removable", device);
2357 return;
2358 }
2359
2360 if (!blk_dev_has_tray(blk)) {
2361 /* Ignore this command on tray-less devices */
2362 return;
2363 }
2364
2365 if (!blk_dev_is_tray_open(blk)) {
2366 return;
2367 }
2368
2369 blk_dev_change_media_cb(blk, true);
2370 }
2371
2372 void qmp_x_blockdev_remove_medium(const char *device, Error **errp)
2373 {
2374 BlockBackend *blk;
2375 BlockDriverState *bs;
2376 AioContext *aio_context;
2377 bool has_device;
2378
2379 blk = blk_by_name(device);
2380 if (!blk) {
2381 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2382 "Device '%s' not found", device);
2383 return;
2384 }
2385
2386 /* For BBs without a device, we can exchange the BDS tree at will */
2387 has_device = blk_get_attached_dev(blk);
2388
2389 if (has_device && !blk_dev_has_removable_media(blk)) {
2390 error_setg(errp, "Device '%s' is not removable", device);
2391 return;
2392 }
2393
2394 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
2395 error_setg(errp, "Tray of device '%s' is not open", device);
2396 return;
2397 }
2398
2399 bs = blk_bs(blk);
2400 if (!bs) {
2401 return;
2402 }
2403
2404 aio_context = bdrv_get_aio_context(bs);
2405 aio_context_acquire(aio_context);
2406
2407 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2408 goto out;
2409 }
2410
2411 /* This follows the convention established by bdrv_make_anon() */
2412 if (bs->device_list.tqe_prev) {
2413 bdrv_device_remove(bs);
2414 }
2415
2416 blk_remove_bs(blk);
2417
2418 if (!blk_dev_has_tray(blk)) {
2419 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2420 * called at all); therefore, the medium needs to be ejected here.
2421 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2422 * value passed here (i.e. false). */
2423 blk_dev_change_media_cb(blk, false);
2424 }
2425
2426 out:
2427 aio_context_release(aio_context);
2428 }
2429
2430 static void qmp_blockdev_insert_anon_medium(const char *device,
2431 BlockDriverState *bs, Error **errp)
2432 {
2433 BlockBackend *blk;
2434 bool has_device;
2435
2436 blk = blk_by_name(device);
2437 if (!blk) {
2438 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2439 "Device '%s' not found", device);
2440 return;
2441 }
2442
2443 /* For BBs without a device, we can exchange the BDS tree at will */
2444 has_device = blk_get_attached_dev(blk);
2445
2446 if (has_device && !blk_dev_has_removable_media(blk)) {
2447 error_setg(errp, "Device '%s' is not removable", device);
2448 return;
2449 }
2450
2451 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
2452 error_setg(errp, "Tray of device '%s' is not open", device);
2453 return;
2454 }
2455
2456 if (blk_bs(blk)) {
2457 error_setg(errp, "There already is a medium in device '%s'", device);
2458 return;
2459 }
2460
2461 blk_insert_bs(blk, bs);
2462
2463 QTAILQ_INSERT_TAIL(&bdrv_states, bs, device_list);
2464
2465 if (!blk_dev_has_tray(blk)) {
2466 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2467 * called at all); therefore, the medium needs to be pushed into the
2468 * slot here.
2469 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2470 * value passed here (i.e. true). */
2471 blk_dev_change_media_cb(blk, true);
2472 }
2473 }
2474
2475 void qmp_x_blockdev_insert_medium(const char *device, const char *node_name,
2476 Error **errp)
2477 {
2478 BlockDriverState *bs;
2479
2480 bs = bdrv_find_node(node_name);
2481 if (!bs) {
2482 error_setg(errp, "Node '%s' not found", node_name);
2483 return;
2484 }
2485
2486 if (bs->blk) {
2487 error_setg(errp, "Node '%s' is already in use by '%s'", node_name,
2488 blk_name(bs->blk));
2489 return;
2490 }
2491
2492 qmp_blockdev_insert_anon_medium(device, bs, errp);
2493 }
2494
2495 void qmp_blockdev_change_medium(const char *device, const char *filename,
2496 bool has_format, const char *format,
2497 bool has_read_only,
2498 BlockdevChangeReadOnlyMode read_only,
2499 Error **errp)
2500 {
2501 BlockBackend *blk;
2502 BlockDriverState *medium_bs = NULL;
2503 int bdrv_flags, ret;
2504 QDict *options = NULL;
2505 Error *err = NULL;
2506
2507 blk = blk_by_name(device);
2508 if (!blk) {
2509 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2510 "Device '%s' not found", device);
2511 goto fail;
2512 }
2513
2514 if (blk_bs(blk)) {
2515 blk_update_root_state(blk);
2516 }
2517
2518 bdrv_flags = blk_get_open_flags_from_root_state(blk);
2519 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
2520 BDRV_O_PROTOCOL);
2521
2522 if (!has_read_only) {
2523 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2524 }
2525
2526 switch (read_only) {
2527 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2528 break;
2529
2530 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2531 bdrv_flags &= ~BDRV_O_RDWR;
2532 break;
2533
2534 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2535 bdrv_flags |= BDRV_O_RDWR;
2536 break;
2537
2538 default:
2539 abort();
2540 }
2541
2542 if (has_format) {
2543 options = qdict_new();
2544 qdict_put(options, "driver", qstring_from_str(format));
2545 }
2546
2547 assert(!medium_bs);
2548 ret = bdrv_open(&medium_bs, filename, NULL, options, bdrv_flags, errp);
2549 if (ret < 0) {
2550 goto fail;
2551 }
2552
2553 blk_apply_root_state(blk, medium_bs);
2554
2555 bdrv_add_key(medium_bs, NULL, &err);
2556 if (err) {
2557 error_propagate(errp, err);
2558 goto fail;
2559 }
2560
2561 qmp_blockdev_open_tray(device, false, false, &err);
2562 if (err) {
2563 error_propagate(errp, err);
2564 goto fail;
2565 }
2566
2567 qmp_x_blockdev_remove_medium(device, &err);
2568 if (err) {
2569 error_propagate(errp, err);
2570 goto fail;
2571 }
2572
2573 qmp_blockdev_insert_anon_medium(device, medium_bs, &err);
2574 if (err) {
2575 error_propagate(errp, err);
2576 goto fail;
2577 }
2578
2579 qmp_blockdev_close_tray(device, errp);
2580
2581 fail:
2582 /* If the medium has been inserted, the device has its own reference, so
2583 * ours must be relinquished; and if it has not been inserted successfully,
2584 * the reference must be relinquished anyway */
2585 bdrv_unref(medium_bs);
2586 }
2587
2588 /* throttling disk I/O limits */
2589 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
2590 int64_t bps_wr,
2591 int64_t iops,
2592 int64_t iops_rd,
2593 int64_t iops_wr,
2594 bool has_bps_max,
2595 int64_t bps_max,
2596 bool has_bps_rd_max,
2597 int64_t bps_rd_max,
2598 bool has_bps_wr_max,
2599 int64_t bps_wr_max,
2600 bool has_iops_max,
2601 int64_t iops_max,
2602 bool has_iops_rd_max,
2603 int64_t iops_rd_max,
2604 bool has_iops_wr_max,
2605 int64_t iops_wr_max,
2606 bool has_bps_max_length,
2607 int64_t bps_max_length,
2608 bool has_bps_rd_max_length,
2609 int64_t bps_rd_max_length,
2610 bool has_bps_wr_max_length,
2611 int64_t bps_wr_max_length,
2612 bool has_iops_max_length,
2613 int64_t iops_max_length,
2614 bool has_iops_rd_max_length,
2615 int64_t iops_rd_max_length,
2616 bool has_iops_wr_max_length,
2617 int64_t iops_wr_max_length,
2618 bool has_iops_size,
2619 int64_t iops_size,
2620 bool has_group,
2621 const char *group, Error **errp)
2622 {
2623 ThrottleConfig cfg;
2624 BlockDriverState *bs;
2625 BlockBackend *blk;
2626 AioContext *aio_context;
2627
2628 blk = blk_by_name(device);
2629 if (!blk) {
2630 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2631 "Device '%s' not found", device);
2632 return;
2633 }
2634
2635 aio_context = blk_get_aio_context(blk);
2636 aio_context_acquire(aio_context);
2637
2638 bs = blk_bs(blk);
2639 if (!bs) {
2640 error_setg(errp, "Device '%s' has no medium", device);
2641 goto out;
2642 }
2643
2644 throttle_config_init(&cfg);
2645 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
2646 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
2647 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
2648
2649 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
2650 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
2651 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
2652
2653 if (has_bps_max) {
2654 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
2655 }
2656 if (has_bps_rd_max) {
2657 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
2658 }
2659 if (has_bps_wr_max) {
2660 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
2661 }
2662 if (has_iops_max) {
2663 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
2664 }
2665 if (has_iops_rd_max) {
2666 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
2667 }
2668 if (has_iops_wr_max) {
2669 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
2670 }
2671
2672 if (has_bps_max_length) {
2673 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = bps_max_length;
2674 }
2675 if (has_bps_rd_max_length) {
2676 cfg.buckets[THROTTLE_BPS_READ].burst_length = bps_rd_max_length;
2677 }
2678 if (has_bps_wr_max_length) {
2679 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = bps_wr_max_length;
2680 }
2681 if (has_iops_max_length) {
2682 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = iops_max_length;
2683 }
2684 if (has_iops_rd_max_length) {
2685 cfg.buckets[THROTTLE_OPS_READ].burst_length = iops_rd_max_length;
2686 }
2687 if (has_iops_wr_max_length) {
2688 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = iops_wr_max_length;
2689 }
2690
2691 if (has_iops_size) {
2692 cfg.op_size = iops_size;
2693 }
2694
2695 if (!throttle_is_valid(&cfg, errp)) {
2696 goto out;
2697 }
2698
2699 if (throttle_enabled(&cfg)) {
2700 /* Enable I/O limits if they're not enabled yet, otherwise
2701 * just update the throttling group. */
2702 if (!bs->throttle_state) {
2703 bdrv_io_limits_enable(bs, has_group ? group : device);
2704 } else if (has_group) {
2705 bdrv_io_limits_update_group(bs, group);
2706 }
2707 /* Set the new throttling configuration */
2708 bdrv_set_io_limits(bs, &cfg);
2709 } else if (bs->throttle_state) {
2710 /* If all throttling settings are set to 0, disable I/O limits */
2711 bdrv_io_limits_disable(bs);
2712 }
2713
2714 out:
2715 aio_context_release(aio_context);
2716 }
2717
2718 void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2719 bool has_granularity, uint32_t granularity,
2720 Error **errp)
2721 {
2722 AioContext *aio_context;
2723 BlockDriverState *bs;
2724
2725 if (!name || name[0] == '\0') {
2726 error_setg(errp, "Bitmap name cannot be empty");
2727 return;
2728 }
2729
2730 bs = bdrv_lookup_bs(node, node, errp);
2731 if (!bs) {
2732 return;
2733 }
2734
2735 aio_context = bdrv_get_aio_context(bs);
2736 aio_context_acquire(aio_context);
2737
2738 if (has_granularity) {
2739 if (granularity < 512 || !is_power_of_2(granularity)) {
2740 error_setg(errp, "Granularity must be power of 2 "
2741 "and at least 512");
2742 goto out;
2743 }
2744 } else {
2745 /* Default to cluster size, if available: */
2746 granularity = bdrv_get_default_bitmap_granularity(bs);
2747 }
2748
2749 bdrv_create_dirty_bitmap(bs, granularity, name, errp);
2750
2751 out:
2752 aio_context_release(aio_context);
2753 }
2754
2755 void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2756 Error **errp)
2757 {
2758 AioContext *aio_context;
2759 BlockDriverState *bs;
2760 BdrvDirtyBitmap *bitmap;
2761
2762 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2763 if (!bitmap || !bs) {
2764 return;
2765 }
2766
2767 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2768 error_setg(errp,
2769 "Bitmap '%s' is currently frozen and cannot be removed",
2770 name);
2771 goto out;
2772 }
2773 bdrv_dirty_bitmap_make_anon(bitmap);
2774 bdrv_release_dirty_bitmap(bs, bitmap);
2775
2776 out:
2777 aio_context_release(aio_context);
2778 }
2779
2780 /**
2781 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2782 * immediately after a full backup operation.
2783 */
2784 void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2785 Error **errp)
2786 {
2787 AioContext *aio_context;
2788 BdrvDirtyBitmap *bitmap;
2789 BlockDriverState *bs;
2790
2791 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2792 if (!bitmap || !bs) {
2793 return;
2794 }
2795
2796 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2797 error_setg(errp,
2798 "Bitmap '%s' is currently frozen and cannot be modified",
2799 name);
2800 goto out;
2801 } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
2802 error_setg(errp,
2803 "Bitmap '%s' is currently disabled and cannot be cleared",
2804 name);
2805 goto out;
2806 }
2807
2808 bdrv_clear_dirty_bitmap(bitmap, NULL);
2809
2810 out:
2811 aio_context_release(aio_context);
2812 }
2813
2814 void hmp_drive_del(Monitor *mon, const QDict *qdict)
2815 {
2816 const char *id = qdict_get_str(qdict, "id");
2817 BlockBackend *blk;
2818 BlockDriverState *bs;
2819 AioContext *aio_context;
2820 Error *local_err = NULL;
2821
2822 blk = blk_by_name(id);
2823 if (!blk) {
2824 error_report("Device '%s' not found", id);
2825 return;
2826 }
2827
2828 if (!blk_legacy_dinfo(blk)) {
2829 error_report("Deleting device added with blockdev-add"
2830 " is not supported");
2831 return;
2832 }
2833
2834 aio_context = blk_get_aio_context(blk);
2835 aio_context_acquire(aio_context);
2836
2837 bs = blk_bs(blk);
2838 if (bs) {
2839 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
2840 error_report_err(local_err);
2841 aio_context_release(aio_context);
2842 return;
2843 }
2844
2845 blk_remove_bs(blk);
2846 }
2847
2848 /* if we have a device attached to this BlockDriverState
2849 * then we need to make the drive anonymous until the device
2850 * can be removed. If this is a drive with no device backing
2851 * then we can just get rid of the block driver state right here.
2852 */
2853 if (blk_get_attached_dev(blk)) {
2854 blk_hide_on_behalf_of_hmp_drive_del(blk);
2855 /* Further I/O must not pause the guest */
2856 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
2857 BLOCKDEV_ON_ERROR_REPORT);
2858 } else {
2859 blk_unref(blk);
2860 }
2861
2862 aio_context_release(aio_context);
2863 }
2864
2865 void qmp_block_resize(bool has_device, const char *device,
2866 bool has_node_name, const char *node_name,
2867 int64_t size, Error **errp)
2868 {
2869 Error *local_err = NULL;
2870 BlockDriverState *bs;
2871 AioContext *aio_context;
2872 int ret;
2873
2874 bs = bdrv_lookup_bs(has_device ? device : NULL,
2875 has_node_name ? node_name : NULL,
2876 &local_err);
2877 if (local_err) {
2878 error_propagate(errp, local_err);
2879 return;
2880 }
2881
2882 aio_context = bdrv_get_aio_context(bs);
2883 aio_context_acquire(aio_context);
2884
2885 if (!bdrv_is_first_non_filter(bs)) {
2886 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
2887 goto out;
2888 }
2889
2890 if (size < 0) {
2891 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
2892 goto out;
2893 }
2894
2895 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
2896 error_setg(errp, QERR_DEVICE_IN_USE, device);
2897 goto out;
2898 }
2899
2900 /* complete all in-flight operations before resizing the device */
2901 bdrv_drain_all();
2902
2903 ret = bdrv_truncate(bs, size);
2904 switch (ret) {
2905 case 0:
2906 break;
2907 case -ENOMEDIUM:
2908 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
2909 break;
2910 case -ENOTSUP:
2911 error_setg(errp, QERR_UNSUPPORTED);
2912 break;
2913 case -EACCES:
2914 error_setg(errp, "Device '%s' is read only", device);
2915 break;
2916 case -EBUSY:
2917 error_setg(errp, QERR_DEVICE_IN_USE, device);
2918 break;
2919 default:
2920 error_setg_errno(errp, -ret, "Could not resize");
2921 break;
2922 }
2923
2924 out:
2925 aio_context_release(aio_context);
2926 }
2927
2928 static void block_job_cb(void *opaque, int ret)
2929 {
2930 /* Note that this function may be executed from another AioContext besides
2931 * the QEMU main loop. If you need to access anything that assumes the
2932 * QEMU global mutex, use a BH or introduce a mutex.
2933 */
2934
2935 BlockDriverState *bs = opaque;
2936 const char *msg = NULL;
2937
2938 trace_block_job_cb(bs, bs->job, ret);
2939
2940 assert(bs->job);
2941
2942 if (ret < 0) {
2943 msg = strerror(-ret);
2944 }
2945
2946 if (block_job_is_cancelled(bs->job)) {
2947 block_job_event_cancelled(bs->job);
2948 } else {
2949 block_job_event_completed(bs->job, msg);
2950 }
2951 }
2952
2953 void qmp_block_stream(const char *device,
2954 bool has_base, const char *base,
2955 bool has_backing_file, const char *backing_file,
2956 bool has_speed, int64_t speed,
2957 bool has_on_error, BlockdevOnError on_error,
2958 Error **errp)
2959 {
2960 BlockBackend *blk;
2961 BlockDriverState *bs;
2962 BlockDriverState *base_bs = NULL;
2963 AioContext *aio_context;
2964 Error *local_err = NULL;
2965 const char *base_name = NULL;
2966
2967 if (!has_on_error) {
2968 on_error = BLOCKDEV_ON_ERROR_REPORT;
2969 }
2970
2971 blk = blk_by_name(device);
2972 if (!blk) {
2973 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2974 "Device '%s' not found", device);
2975 return;
2976 }
2977
2978 aio_context = blk_get_aio_context(blk);
2979 aio_context_acquire(aio_context);
2980
2981 if (!blk_is_available(blk)) {
2982 error_setg(errp, "Device '%s' has no medium", device);
2983 goto out;
2984 }
2985 bs = blk_bs(blk);
2986
2987 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
2988 goto out;
2989 }
2990
2991 if (has_base) {
2992 base_bs = bdrv_find_backing_image(bs, base);
2993 if (base_bs == NULL) {
2994 error_setg(errp, QERR_BASE_NOT_FOUND, base);
2995 goto out;
2996 }
2997 assert(bdrv_get_aio_context(base_bs) == aio_context);
2998 base_name = base;
2999 }
3000
3001 /* if we are streaming the entire chain, the result will have no backing
3002 * file, and specifying one is therefore an error */
3003 if (base_bs == NULL && has_backing_file) {
3004 error_setg(errp, "backing file specified, but streaming the "
3005 "entire chain");
3006 goto out;
3007 }
3008
3009 /* backing_file string overrides base bs filename */
3010 base_name = has_backing_file ? backing_file : base_name;
3011
3012 stream_start(bs, base_bs, base_name, has_speed ? speed : 0,
3013 on_error, block_job_cb, bs, &local_err);
3014 if (local_err) {
3015 error_propagate(errp, local_err);
3016 goto out;
3017 }
3018
3019 trace_qmp_block_stream(bs, bs->job);
3020
3021 out:
3022 aio_context_release(aio_context);
3023 }
3024
3025 void qmp_block_commit(const char *device,
3026 bool has_base, const char *base,
3027 bool has_top, const char *top,
3028 bool has_backing_file, const char *backing_file,
3029 bool has_speed, int64_t speed,
3030 Error **errp)
3031 {
3032 BlockBackend *blk;
3033 BlockDriverState *bs;
3034 BlockDriverState *base_bs, *top_bs;
3035 AioContext *aio_context;
3036 Error *local_err = NULL;
3037 /* This will be part of the QMP command, if/when the
3038 * BlockdevOnError change for blkmirror makes it in
3039 */
3040 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
3041
3042 if (!has_speed) {
3043 speed = 0;
3044 }
3045
3046 /* Important Note:
3047 * libvirt relies on the DeviceNotFound error class in order to probe for
3048 * live commit feature versions; for this to work, we must make sure to
3049 * perform the device lookup before any generic errors that may occur in a
3050 * scenario in which all optional arguments are omitted. */
3051 blk = blk_by_name(device);
3052 if (!blk) {
3053 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3054 "Device '%s' not found", device);
3055 return;
3056 }
3057
3058 aio_context = blk_get_aio_context(blk);
3059 aio_context_acquire(aio_context);
3060
3061 if (!blk_is_available(blk)) {
3062 error_setg(errp, "Device '%s' has no medium", device);
3063 goto out;
3064 }
3065 bs = blk_bs(blk);
3066
3067 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
3068 goto out;
3069 }
3070
3071 /* default top_bs is the active layer */
3072 top_bs = bs;
3073
3074 if (has_top && top) {
3075 if (strcmp(bs->filename, top) != 0) {
3076 top_bs = bdrv_find_backing_image(bs, top);
3077 }
3078 }
3079
3080 if (top_bs == NULL) {
3081 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
3082 goto out;
3083 }
3084
3085 assert(bdrv_get_aio_context(top_bs) == aio_context);
3086
3087 if (has_base && base) {
3088 base_bs = bdrv_find_backing_image(top_bs, base);
3089 } else {
3090 base_bs = bdrv_find_base(top_bs);
3091 }
3092
3093 if (base_bs == NULL) {
3094 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
3095 goto out;
3096 }
3097
3098 assert(bdrv_get_aio_context(base_bs) == aio_context);
3099
3100 if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3101 goto out;
3102 }
3103
3104 /* Do not allow attempts to commit an image into itself */
3105 if (top_bs == base_bs) {
3106 error_setg(errp, "cannot commit an image into itself");
3107 goto out;
3108 }
3109
3110 if (top_bs == bs) {
3111 if (has_backing_file) {
3112 error_setg(errp, "'backing-file' specified,"
3113 " but 'top' is the active layer");
3114 goto out;
3115 }
3116 commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
3117 bs, &local_err);
3118 } else {
3119 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
3120 has_backing_file ? backing_file : NULL, &local_err);
3121 }
3122 if (local_err != NULL) {
3123 error_propagate(errp, local_err);
3124 goto out;
3125 }
3126
3127 out:
3128 aio_context_release(aio_context);
3129 }
3130
3131 static void do_drive_backup(const char *device, const char *target,
3132 bool has_format, const char *format,
3133 enum MirrorSyncMode sync,
3134 bool has_mode, enum NewImageMode mode,
3135 bool has_speed, int64_t speed,
3136 bool has_bitmap, const char *bitmap,
3137 bool has_on_source_error,
3138 BlockdevOnError on_source_error,
3139 bool has_on_target_error,
3140 BlockdevOnError on_target_error,
3141 BlockJobTxn *txn, Error **errp)
3142 {
3143 BlockBackend *blk;
3144 BlockDriverState *bs;
3145 BlockDriverState *target_bs;
3146 BlockDriverState *source = NULL;
3147 BdrvDirtyBitmap *bmap = NULL;
3148 AioContext *aio_context;
3149 QDict *options = NULL;
3150 Error *local_err = NULL;
3151 int flags;
3152 int64_t size;
3153 int ret;
3154
3155 if (!has_speed) {
3156 speed = 0;
3157 }
3158 if (!has_on_source_error) {
3159 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3160 }
3161 if (!has_on_target_error) {
3162 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3163 }
3164 if (!has_mode) {
3165 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3166 }
3167
3168 blk = blk_by_name(device);
3169 if (!blk) {
3170 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3171 "Device '%s' not found", device);
3172 return;
3173 }
3174
3175 aio_context = blk_get_aio_context(blk);
3176 aio_context_acquire(aio_context);
3177
3178 /* Although backup_run has this check too, we need to use bs->drv below, so
3179 * do an early check redundantly. */
3180 if (!blk_is_available(blk)) {
3181 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
3182 goto out;
3183 }
3184 bs = blk_bs(blk);
3185
3186 if (!has_format) {
3187 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
3188 }
3189
3190 /* Early check to avoid creating target */
3191 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
3192 goto out;
3193 }
3194
3195 flags = bs->open_flags | BDRV_O_RDWR;
3196
3197 /* See if we have a backing HD we can use to create our new image
3198 * on top of. */
3199 if (sync == MIRROR_SYNC_MODE_TOP) {
3200 source = backing_bs(bs);
3201 if (!source) {
3202 sync = MIRROR_SYNC_MODE_FULL;
3203 }
3204 }
3205 if (sync == MIRROR_SYNC_MODE_NONE) {
3206 source = bs;
3207 }
3208
3209 size = bdrv_getlength(bs);
3210 if (size < 0) {
3211 error_setg_errno(errp, -size, "bdrv_getlength failed");
3212 goto out;
3213 }
3214
3215 if (mode != NEW_IMAGE_MODE_EXISTING) {
3216 assert(format);
3217 if (source) {
3218 bdrv_img_create(target, format, source->filename,
3219 source->drv->format_name, NULL,
3220 size, flags, &local_err, false);
3221 } else {
3222 bdrv_img_create(target, format, NULL, NULL, NULL,
3223 size, flags, &local_err, false);
3224 }
3225 }
3226
3227 if (local_err) {
3228 error_propagate(errp, local_err);
3229 goto out;
3230 }
3231
3232 if (format) {
3233 options = qdict_new();
3234 qdict_put(options, "driver", qstring_from_str(format));
3235 }
3236
3237 target_bs = NULL;
3238 ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
3239 if (ret < 0) {
3240 error_propagate(errp, local_err);
3241 goto out;
3242 }
3243
3244 bdrv_set_aio_context(target_bs, aio_context);
3245
3246 if (has_bitmap) {
3247 bmap = bdrv_find_dirty_bitmap(bs, bitmap);
3248 if (!bmap) {
3249 error_setg(errp, "Bitmap '%s' could not be found", bitmap);
3250 bdrv_unref(target_bs);
3251 goto out;
3252 }
3253 }
3254
3255 backup_start(bs, target_bs, speed, sync, bmap,
3256 on_source_error, on_target_error,
3257 block_job_cb, bs, txn, &local_err);
3258 if (local_err != NULL) {
3259 bdrv_unref(target_bs);
3260 error_propagate(errp, local_err);
3261 goto out;
3262 }
3263
3264 out:
3265 aio_context_release(aio_context);
3266 }
3267
3268 void qmp_drive_backup(const char *device, const char *target,
3269 bool has_format, const char *format,
3270 enum MirrorSyncMode sync,
3271 bool has_mode, enum NewImageMode mode,
3272 bool has_speed, int64_t speed,
3273 bool has_bitmap, const char *bitmap,
3274 bool has_on_source_error, BlockdevOnError on_source_error,
3275 bool has_on_target_error, BlockdevOnError on_target_error,
3276 Error **errp)
3277 {
3278 return do_drive_backup(device, target, has_format, format, sync,
3279 has_mode, mode, has_speed, speed,
3280 has_bitmap, bitmap,
3281 has_on_source_error, on_source_error,
3282 has_on_target_error, on_target_error,
3283 NULL, errp);
3284 }
3285
3286 BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3287 {
3288 return bdrv_named_nodes_list(errp);
3289 }
3290
3291 void do_blockdev_backup(const char *device, const char *target,
3292 enum MirrorSyncMode sync,
3293 bool has_speed, int64_t speed,
3294 bool has_on_source_error,
3295 BlockdevOnError on_source_error,
3296 bool has_on_target_error,
3297 BlockdevOnError on_target_error,
3298 BlockJobTxn *txn, Error **errp)
3299 {
3300 BlockBackend *blk, *target_blk;
3301 BlockDriverState *bs;
3302 BlockDriverState *target_bs;
3303 Error *local_err = NULL;
3304 AioContext *aio_context;
3305
3306 if (!has_speed) {
3307 speed = 0;
3308 }
3309 if (!has_on_source_error) {
3310 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3311 }
3312 if (!has_on_target_error) {
3313 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3314 }
3315
3316 blk = blk_by_name(device);
3317 if (!blk) {
3318 error_setg(errp, "Device '%s' not found", device);
3319 return;
3320 }
3321
3322 aio_context = blk_get_aio_context(blk);
3323 aio_context_acquire(aio_context);
3324
3325 if (!blk_is_available(blk)) {
3326 error_setg(errp, "Device '%s' has no medium", device);
3327 goto out;
3328 }
3329 bs = blk_bs(blk);
3330
3331 target_blk = blk_by_name(target);
3332 if (!target_blk) {
3333 error_setg(errp, "Device '%s' not found", target);
3334 goto out;
3335 }
3336
3337 if (!blk_is_available(target_blk)) {
3338 error_setg(errp, "Device '%s' has no medium", target);
3339 goto out;
3340 }
3341 target_bs = blk_bs(target_blk);
3342
3343 bdrv_ref(target_bs);
3344 bdrv_set_aio_context(target_bs, aio_context);
3345 backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
3346 on_target_error, block_job_cb, bs, txn, &local_err);
3347 if (local_err != NULL) {
3348 bdrv_unref(target_bs);
3349 error_propagate(errp, local_err);
3350 }
3351 out:
3352 aio_context_release(aio_context);
3353 }
3354
3355 void qmp_blockdev_backup(const char *device, const char *target,
3356 enum MirrorSyncMode sync,
3357 bool has_speed, int64_t speed,
3358 bool has_on_source_error,
3359 BlockdevOnError on_source_error,
3360 bool has_on_target_error,
3361 BlockdevOnError on_target_error,
3362 Error **errp)
3363 {
3364 do_blockdev_backup(device, target, sync, has_speed, speed,
3365 has_on_source_error, on_source_error,
3366 has_on_target_error, on_target_error,
3367 NULL, errp);
3368 }
3369
3370 /* Parameter check and block job starting for drive mirroring.
3371 * Caller should hold @device and @target's aio context (must be the same).
3372 **/
3373 static void blockdev_mirror_common(BlockDriverState *bs,
3374 BlockDriverState *target,
3375 bool has_replaces, const char *replaces,
3376 enum MirrorSyncMode sync,
3377 bool has_speed, int64_t speed,
3378 bool has_granularity, uint32_t granularity,
3379 bool has_buf_size, int64_t buf_size,
3380 bool has_on_source_error,
3381 BlockdevOnError on_source_error,
3382 bool has_on_target_error,
3383 BlockdevOnError on_target_error,
3384 bool has_unmap, bool unmap,
3385 Error **errp)
3386 {
3387
3388 if (!has_speed) {
3389 speed = 0;
3390 }
3391 if (!has_on_source_error) {
3392 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3393 }
3394 if (!has_on_target_error) {
3395 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3396 }
3397 if (!has_granularity) {
3398 granularity = 0;
3399 }
3400 if (!has_buf_size) {
3401 buf_size = 0;
3402 }
3403 if (!has_unmap) {
3404 unmap = true;
3405 }
3406
3407 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
3408 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3409 "a value in range [512B, 64MB]");
3410 return;
3411 }
3412 if (granularity & (granularity - 1)) {
3413 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3414 "power of 2");
3415 return;
3416 }
3417
3418 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3419 return;
3420 }
3421 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3422 return;
3423 }
3424 if (target->blk) {
3425 error_setg(errp, "Cannot mirror to an attached block device");
3426 return;
3427 }
3428
3429 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3430 sync = MIRROR_SYNC_MODE_FULL;
3431 }
3432
3433 /* pass the node name to replace to mirror start since it's loose coupling
3434 * and will allow to check whether the node still exist at mirror completion
3435 */
3436 mirror_start(bs, target,
3437 has_replaces ? replaces : NULL,
3438 speed, granularity, buf_size, sync,
3439 on_source_error, on_target_error, unmap,
3440 block_job_cb, bs, errp);
3441 }
3442
3443 void qmp_drive_mirror(const char *device, const char *target,
3444 bool has_format, const char *format,
3445 bool has_node_name, const char *node_name,
3446 bool has_replaces, const char *replaces,
3447 enum MirrorSyncMode sync,
3448 bool has_mode, enum NewImageMode mode,
3449 bool has_speed, int64_t speed,
3450 bool has_granularity, uint32_t granularity,
3451 bool has_buf_size, int64_t buf_size,
3452 bool has_on_source_error, BlockdevOnError on_source_error,
3453 bool has_on_target_error, BlockdevOnError on_target_error,
3454 bool has_unmap, bool unmap,
3455 Error **errp)
3456 {
3457 BlockDriverState *bs;
3458 BlockBackend *blk;
3459 BlockDriverState *source, *target_bs;
3460 AioContext *aio_context;
3461 Error *local_err = NULL;
3462 QDict *options = NULL;
3463 int flags;
3464 int64_t size;
3465 int ret;
3466
3467 blk = blk_by_name(device);
3468 if (!blk) {
3469 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3470 "Device '%s' not found", device);
3471 return;
3472 }
3473
3474 aio_context = blk_get_aio_context(blk);
3475 aio_context_acquire(aio_context);
3476
3477 if (!blk_is_available(blk)) {
3478 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
3479 goto out;
3480 }
3481 bs = blk_bs(blk);
3482 if (!has_mode) {
3483 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3484 }
3485
3486 if (!has_format) {
3487 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
3488 }
3489
3490 flags = bs->open_flags | BDRV_O_RDWR;
3491 source = backing_bs(bs);
3492 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
3493 sync = MIRROR_SYNC_MODE_FULL;
3494 }
3495 if (sync == MIRROR_SYNC_MODE_NONE) {
3496 source = bs;
3497 }
3498
3499 size = bdrv_getlength(bs);
3500 if (size < 0) {
3501 error_setg_errno(errp, -size, "bdrv_getlength failed");
3502 goto out;
3503 }
3504
3505 if (has_replaces) {
3506 BlockDriverState *to_replace_bs;
3507 AioContext *replace_aio_context;
3508 int64_t replace_size;
3509
3510 if (!has_node_name) {
3511 error_setg(errp, "a node-name must be provided when replacing a"
3512 " named node of the graph");
3513 goto out;
3514 }
3515
3516 to_replace_bs = check_to_replace_node(bs, replaces, &local_err);
3517
3518 if (!to_replace_bs) {
3519 error_propagate(errp, local_err);
3520 goto out;
3521 }
3522
3523 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3524 aio_context_acquire(replace_aio_context);
3525 replace_size = bdrv_getlength(to_replace_bs);
3526 aio_context_release(replace_aio_context);
3527
3528 if (size != replace_size) {
3529 error_setg(errp, "cannot replace image with a mirror image of "
3530 "different size");
3531 goto out;
3532 }
3533 }
3534
3535 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
3536 && mode != NEW_IMAGE_MODE_EXISTING)
3537 {
3538 /* create new image w/o backing file */
3539 assert(format);
3540 bdrv_img_create(target, format,
3541 NULL, NULL, NULL, size, flags, &local_err, false);
3542 } else {
3543 switch (mode) {
3544 case NEW_IMAGE_MODE_EXISTING:
3545 break;
3546 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3547 /* create new image with backing file */
3548 bdrv_img_create(target, format,
3549 source->filename,
3550 source->drv->format_name,
3551 NULL, size, flags, &local_err, false);
3552 break;
3553 default:
3554 abort();
3555 }
3556 }
3557
3558 if (local_err) {
3559 error_propagate(errp, local_err);
3560 goto out;
3561 }
3562
3563 options = qdict_new();
3564 if (has_node_name) {
3565 qdict_put(options, "node-name", qstring_from_str(node_name));
3566 }
3567 if (format) {
3568 qdict_put(options, "driver", qstring_from_str(format));
3569 }
3570
3571 /* Mirroring takes care of copy-on-write using the source's backing
3572 * file.
3573 */
3574 target_bs = NULL;
3575 ret = bdrv_open(&target_bs, target, NULL, options,
3576 flags | BDRV_O_NO_BACKING, &local_err);
3577 if (ret < 0) {
3578 error_propagate(errp, local_err);
3579 goto out;
3580 }
3581
3582 bdrv_set_aio_context(target_bs, aio_context);
3583
3584 blockdev_mirror_common(bs, target_bs,
3585 has_replaces, replaces, sync,
3586 has_speed, speed,
3587 has_granularity, granularity,
3588 has_buf_size, buf_size,
3589 has_on_source_error, on_source_error,
3590 has_on_target_error, on_target_error,
3591 has_unmap, unmap,
3592 &local_err);
3593 if (local_err) {
3594 error_propagate(errp, local_err);
3595 bdrv_unref(target_bs);
3596 }
3597 out:
3598 aio_context_release(aio_context);
3599 }
3600
3601 void qmp_blockdev_mirror(const char *device, const char *target,
3602 bool has_replaces, const char *replaces,
3603 MirrorSyncMode sync,
3604 bool has_speed, int64_t speed,
3605 bool has_granularity, uint32_t granularity,
3606 bool has_buf_size, int64_t buf_size,
3607 bool has_on_source_error,
3608 BlockdevOnError on_source_error,
3609 bool has_on_target_error,
3610 BlockdevOnError on_target_error,
3611 Error **errp)
3612 {
3613 BlockDriverState *bs;
3614 BlockBackend *blk;
3615 BlockDriverState *target_bs;
3616 AioContext *aio_context;
3617 Error *local_err = NULL;
3618
3619 blk = blk_by_name(device);
3620 if (!blk) {
3621 error_setg(errp, "Device '%s' not found", device);
3622 return;
3623 }
3624 bs = blk_bs(blk);
3625
3626 if (!bs) {
3627 error_setg(errp, "Device '%s' has no media", device);
3628 return;
3629 }
3630
3631 target_bs = bdrv_lookup_bs(target, target, errp);
3632 if (!target_bs) {
3633 return;
3634 }
3635
3636 aio_context = bdrv_get_aio_context(bs);
3637 aio_context_acquire(aio_context);
3638
3639 bdrv_ref(target_bs);
3640 bdrv_set_aio_context(target_bs, aio_context);
3641
3642 blockdev_mirror_common(bs, target_bs,
3643 has_replaces, replaces, sync,
3644 has_speed, speed,
3645 has_granularity, granularity,
3646 has_buf_size, buf_size,
3647 has_on_source_error, on_source_error,
3648 has_on_target_error, on_target_error,
3649 true, true,
3650 &local_err);
3651 if (local_err) {
3652 error_propagate(errp, local_err);
3653 bdrv_unref(target_bs);
3654 }
3655
3656 aio_context_release(aio_context);
3657 }
3658
3659 /* Get the block job for a given device name and acquire its AioContext */
3660 static BlockJob *find_block_job(const char *device, AioContext **aio_context,
3661 Error **errp)
3662 {
3663 BlockBackend *blk;
3664 BlockDriverState *bs;
3665
3666 *aio_context = NULL;
3667
3668 blk = blk_by_name(device);
3669 if (!blk) {
3670 goto notfound;
3671 }
3672
3673 *aio_context = blk_get_aio_context(blk);
3674 aio_context_acquire(*aio_context);
3675
3676 if (!blk_is_available(blk)) {
3677 goto notfound;
3678 }
3679 bs = blk_bs(blk);
3680
3681 if (!bs->job) {
3682 goto notfound;
3683 }
3684
3685 return bs->job;
3686
3687 notfound:
3688 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
3689 "No active block job on device '%s'", device);
3690 if (*aio_context) {
3691 aio_context_release(*aio_context);
3692 *aio_context = NULL;
3693 }
3694 return NULL;
3695 }
3696
3697 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
3698 {
3699 AioContext *aio_context;
3700 BlockJob *job = find_block_job(device, &aio_context, errp);
3701
3702 if (!job) {
3703 return;
3704 }
3705
3706 block_job_set_speed(job, speed, errp);
3707 aio_context_release(aio_context);
3708 }
3709
3710 void qmp_block_job_cancel(const char *device,
3711 bool has_force, bool force, Error **errp)
3712 {
3713 AioContext *aio_context;
3714 BlockJob *job = find_block_job(device, &aio_context, errp);
3715
3716 if (!job) {
3717 return;
3718 }
3719
3720 if (!has_force) {
3721 force = false;
3722 }
3723
3724 if (job->user_paused && !force) {
3725 error_setg(errp, "The block job for device '%s' is currently paused",
3726 device);
3727 goto out;
3728 }
3729
3730 trace_qmp_block_job_cancel(job);
3731 block_job_cancel(job);
3732 out:
3733 aio_context_release(aio_context);
3734 }
3735
3736 void qmp_block_job_pause(const char *device, Error **errp)
3737 {
3738 AioContext *aio_context;
3739 BlockJob *job = find_block_job(device, &aio_context, errp);
3740
3741 if (!job || job->user_paused) {
3742 return;
3743 }
3744
3745 job->user_paused = true;
3746 trace_qmp_block_job_pause(job);
3747 block_job_pause(job);
3748 aio_context_release(aio_context);
3749 }
3750
3751 void qmp_block_job_resume(const char *device, Error **errp)
3752 {
3753 AioContext *aio_context;
3754 BlockJob *job = find_block_job(device, &aio_context, errp);
3755
3756 if (!job || !job->user_paused) {
3757 return;
3758 }
3759
3760 job->user_paused = false;
3761 trace_qmp_block_job_resume(job);
3762 block_job_resume(job);
3763 aio_context_release(aio_context);
3764 }
3765
3766 void qmp_block_job_complete(const char *device, Error **errp)
3767 {
3768 AioContext *aio_context;
3769 BlockJob *job = find_block_job(device, &aio_context, errp);
3770
3771 if (!job) {
3772 return;
3773 }
3774
3775 trace_qmp_block_job_complete(job);
3776 block_job_complete(job, errp);
3777 aio_context_release(aio_context);
3778 }
3779
3780 void qmp_change_backing_file(const char *device,
3781 const char *image_node_name,
3782 const char *backing_file,
3783 Error **errp)
3784 {
3785 BlockBackend *blk;
3786 BlockDriverState *bs = NULL;
3787 AioContext *aio_context;
3788 BlockDriverState *image_bs = NULL;
3789 Error *local_err = NULL;
3790 bool ro;
3791 int open_flags;
3792 int ret;
3793
3794 blk = blk_by_name(device);
3795 if (!blk) {
3796 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3797 "Device '%s' not found", device);
3798 return;
3799 }
3800
3801 aio_context = blk_get_aio_context(blk);
3802 aio_context_acquire(aio_context);
3803
3804 if (!blk_is_available(blk)) {
3805 error_setg(errp, "Device '%s' has no medium", device);
3806 goto out;
3807 }
3808 bs = blk_bs(blk);
3809
3810 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
3811 if (local_err) {
3812 error_propagate(errp, local_err);
3813 goto out;
3814 }
3815
3816 if (!image_bs) {
3817 error_setg(errp, "image file not found");
3818 goto out;
3819 }
3820
3821 if (bdrv_find_base(image_bs) == image_bs) {
3822 error_setg(errp, "not allowing backing file change on an image "
3823 "without a backing file");
3824 goto out;
3825 }
3826
3827 /* even though we are not necessarily operating on bs, we need it to
3828 * determine if block ops are currently prohibited on the chain */
3829 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
3830 goto out;
3831 }
3832
3833 /* final sanity check */
3834 if (!bdrv_chain_contains(bs, image_bs)) {
3835 error_setg(errp, "'%s' and image file are not in the same chain",
3836 device);
3837 goto out;
3838 }
3839
3840 /* if not r/w, reopen to make r/w */
3841 open_flags = image_bs->open_flags;
3842 ro = bdrv_is_read_only(image_bs);
3843
3844 if (ro) {
3845 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
3846 if (local_err) {
3847 error_propagate(errp, local_err);
3848 goto out;
3849 }
3850 }
3851
3852 ret = bdrv_change_backing_file(image_bs, backing_file,
3853 image_bs->drv ? image_bs->drv->format_name : "");
3854
3855 if (ret < 0) {
3856 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
3857 backing_file);
3858 /* don't exit here, so we can try to restore open flags if
3859 * appropriate */
3860 }
3861
3862 if (ro) {
3863 bdrv_reopen(image_bs, open_flags, &local_err);
3864 if (local_err) {
3865 error_propagate(errp, local_err); /* will preserve prior errp */
3866 }
3867 }
3868
3869 out:
3870 aio_context_release(aio_context);
3871 }
3872
3873 void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
3874 {
3875 QmpOutputVisitor *ov = qmp_output_visitor_new();
3876 BlockDriverState *bs;
3877 BlockBackend *blk = NULL;
3878 QObject *obj;
3879 QDict *qdict;
3880 Error *local_err = NULL;
3881
3882 /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
3883 * cache.direct=false instead of silently switching to aio=threads, except
3884 * when called from drive_new().
3885 *
3886 * For now, simply forbidding the combination for all drivers will do. */
3887 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
3888 bool direct = options->has_cache &&
3889 options->cache->has_direct &&
3890 options->cache->direct;
3891 if (!direct) {
3892 error_setg(errp, "aio=native requires cache.direct=true");
3893 goto fail;
3894 }
3895 }
3896
3897 visit_type_BlockdevOptions(qmp_output_get_visitor(ov), NULL, &options,
3898 &local_err);
3899 if (local_err) {
3900 error_propagate(errp, local_err);
3901 goto fail;
3902 }
3903
3904 obj = qmp_output_get_qobject(ov);
3905 qdict = qobject_to_qdict(obj);
3906
3907 qdict_flatten(qdict);
3908
3909 if (options->has_id) {
3910 blk = blockdev_init(NULL, qdict, &local_err);
3911 if (local_err) {
3912 error_propagate(errp, local_err);
3913 goto fail;
3914 }
3915
3916 bs = blk_bs(blk);
3917 } else {
3918 if (!qdict_get_try_str(qdict, "node-name")) {
3919 error_setg(errp, "'id' and/or 'node-name' need to be specified for "
3920 "the root node");
3921 goto fail;
3922 }
3923
3924 bs = bds_tree_init(qdict, errp);
3925 if (!bs) {
3926 goto fail;
3927 }
3928
3929 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
3930 }
3931
3932 if (bs && bdrv_key_required(bs)) {
3933 if (blk) {
3934 blk_unref(blk);
3935 } else {
3936 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
3937 bdrv_unref(bs);
3938 }
3939 error_setg(errp, "blockdev-add doesn't support encrypted devices");
3940 goto fail;
3941 }
3942
3943 fail:
3944 qmp_output_visitor_cleanup(ov);
3945 }
3946
3947 void qmp_x_blockdev_del(bool has_id, const char *id,
3948 bool has_node_name, const char *node_name, Error **errp)
3949 {
3950 AioContext *aio_context;
3951 BlockBackend *blk;
3952 BlockDriverState *bs;
3953
3954 if (has_id && has_node_name) {
3955 error_setg(errp, "Only one of id and node-name must be specified");
3956 return;
3957 } else if (!has_id && !has_node_name) {
3958 error_setg(errp, "No block device specified");
3959 return;
3960 }
3961
3962 if (has_id) {
3963 blk = blk_by_name(id);
3964 if (!blk) {
3965 error_setg(errp, "Cannot find block backend %s", id);
3966 return;
3967 }
3968 if (blk_get_refcnt(blk) > 1) {
3969 error_setg(errp, "Block backend %s is in use", id);
3970 return;
3971 }
3972 bs = blk_bs(blk);
3973 aio_context = blk_get_aio_context(blk);
3974 } else {
3975 bs = bdrv_find_node(node_name);
3976 if (!bs) {
3977 error_setg(errp, "Cannot find node %s", node_name);
3978 return;
3979 }
3980 blk = bs->blk;
3981 if (blk) {
3982 error_setg(errp, "Node %s is in use by %s",
3983 node_name, blk_name(blk));
3984 return;
3985 }
3986 aio_context = bdrv_get_aio_context(bs);
3987 }
3988
3989 aio_context_acquire(aio_context);
3990
3991 if (bs) {
3992 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
3993 goto out;
3994 }
3995
3996 if (!blk && !bs->monitor_list.tqe_prev) {
3997 error_setg(errp, "Node %s is not owned by the monitor",
3998 bs->node_name);
3999 goto out;
4000 }
4001
4002 if (bs->refcnt > 1) {
4003 error_setg(errp, "Block device %s is in use",
4004 bdrv_get_device_or_node_name(bs));
4005 goto out;
4006 }
4007 }
4008
4009 if (blk) {
4010 blk_unref(blk);
4011 } else {
4012 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
4013 bdrv_unref(bs);
4014 }
4015
4016 out:
4017 aio_context_release(aio_context);
4018 }
4019
4020 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
4021 {
4022 BlockJobInfoList *head = NULL, **p_next = &head;
4023 BlockDriverState *bs;
4024
4025 for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
4026 AioContext *aio_context = bdrv_get_aio_context(bs);
4027
4028 aio_context_acquire(aio_context);
4029
4030 if (bs->job) {
4031 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
4032 elem->value = block_job_query(bs->job);
4033 *p_next = elem;
4034 p_next = &elem->next;
4035 }
4036
4037 aio_context_release(aio_context);
4038 }
4039
4040 return head;
4041 }
4042
4043 QemuOptsList qemu_common_drive_opts = {
4044 .name = "drive",
4045 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
4046 .desc = {
4047 {
4048 .name = "snapshot",
4049 .type = QEMU_OPT_BOOL,
4050 .help = "enable/disable snapshot mode",
4051 },{
4052 .name = "discard",
4053 .type = QEMU_OPT_STRING,
4054 .help = "discard operation (ignore/off, unmap/on)",
4055 },{
4056 .name = "aio",
4057 .type = QEMU_OPT_STRING,
4058 .help = "host AIO implementation (threads, native)",
4059 },{
4060 .name = "format",
4061 .type = QEMU_OPT_STRING,
4062 .help = "disk format (raw, qcow2, ...)",
4063 },{
4064 .name = "rerror",
4065 .type = QEMU_OPT_STRING,
4066 .help = "read error action",
4067 },{
4068 .name = "werror",
4069 .type = QEMU_OPT_STRING,
4070 .help = "write error action",
4071 },{
4072 .name = "read-only",
4073 .type = QEMU_OPT_BOOL,
4074 .help = "open drive file as read-only",
4075 },{
4076 .name = "throttling.iops-total",
4077 .type = QEMU_OPT_NUMBER,
4078 .help = "limit total I/O operations per second",
4079 },{
4080 .name = "throttling.iops-read",
4081 .type = QEMU_OPT_NUMBER,
4082 .help = "limit read operations per second",
4083 },{
4084 .name = "throttling.iops-write",
4085 .type = QEMU_OPT_NUMBER,
4086 .help = "limit write operations per second",
4087 },{
4088 .name = "throttling.bps-total",
4089 .type = QEMU_OPT_NUMBER,
4090 .help = "limit total bytes per second",
4091 },{
4092 .name = "throttling.bps-read",
4093 .type = QEMU_OPT_NUMBER,
4094 .help = "limit read bytes per second",
4095 },{
4096 .name = "throttling.bps-write",
4097 .type = QEMU_OPT_NUMBER,
4098 .help = "limit write bytes per second",
4099 },{
4100 .name = "throttling.iops-total-max",
4101 .type = QEMU_OPT_NUMBER,
4102 .help = "I/O operations burst",
4103 },{
4104 .name = "throttling.iops-read-max",
4105 .type = QEMU_OPT_NUMBER,
4106 .help = "I/O operations read burst",
4107 },{
4108 .name = "throttling.iops-write-max",
4109 .type = QEMU_OPT_NUMBER,
4110 .help = "I/O operations write burst",
4111 },{
4112 .name = "throttling.bps-total-max",
4113 .type = QEMU_OPT_NUMBER,
4114 .help = "total bytes burst",
4115 },{
4116 .name = "throttling.bps-read-max",
4117 .type = QEMU_OPT_NUMBER,
4118 .help = "total bytes read burst",
4119 },{
4120 .name = "throttling.bps-write-max",
4121 .type = QEMU_OPT_NUMBER,
4122 .help = "total bytes write burst",
4123 },{
4124 .name = "throttling.iops-total-max-length",
4125 .type = QEMU_OPT_NUMBER,
4126 .help = "length of the iops-total-max burst period, in seconds",
4127 },{
4128 .name = "throttling.iops-read-max-length",
4129 .type = QEMU_OPT_NUMBER,
4130 .help = "length of the iops-read-max burst period, in seconds",
4131 },{
4132 .name = "throttling.iops-write-max-length",
4133 .type = QEMU_OPT_NUMBER,
4134 .help = "length of the iops-write-max burst period, in seconds",
4135 },{
4136 .name = "throttling.bps-total-max-length",
4137 .type = QEMU_OPT_NUMBER,
4138 .help = "length of the bps-total-max burst period, in seconds",
4139 },{
4140 .name = "throttling.bps-read-max-length",
4141 .type = QEMU_OPT_NUMBER,
4142 .help = "length of the bps-read-max burst period, in seconds",
4143 },{
4144 .name = "throttling.bps-write-max-length",
4145 .type = QEMU_OPT_NUMBER,
4146 .help = "length of the bps-write-max burst period, in seconds",
4147 },{
4148 .name = "throttling.iops-size",
4149 .type = QEMU_OPT_NUMBER,
4150 .help = "when limiting by iops max size of an I/O in bytes",
4151 },{
4152 .name = "throttling.group",
4153 .type = QEMU_OPT_STRING,
4154 .help = "name of the block throttling group",
4155 },{
4156 .name = "copy-on-read",
4157 .type = QEMU_OPT_BOOL,
4158 .help = "copy read data from backing file into image file",
4159 },{
4160 .name = "detect-zeroes",
4161 .type = QEMU_OPT_STRING,
4162 .help = "try to optimize zero writes (off, on, unmap)",
4163 },{
4164 .name = "stats-account-invalid",
4165 .type = QEMU_OPT_BOOL,
4166 .help = "whether to account for invalid I/O operations "
4167 "in the statistics",
4168 },{
4169 .name = "stats-account-failed",
4170 .type = QEMU_OPT_BOOL,
4171 .help = "whether to account for failed I/O operations "
4172 "in the statistics",
4173 },
4174 { /* end of list */ }
4175 },
4176 };
4177
4178 static QemuOptsList qemu_root_bds_opts = {
4179 .name = "root-bds",
4180 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
4181 .desc = {
4182 {
4183 .name = "discard",
4184 .type = QEMU_OPT_STRING,
4185 .help = "discard operation (ignore/off, unmap/on)",
4186 },{
4187 .name = "aio",
4188 .type = QEMU_OPT_STRING,
4189 .help = "host AIO implementation (threads, native)",
4190 },{
4191 .name = "read-only",
4192 .type = QEMU_OPT_BOOL,
4193 .help = "open drive file as read-only",
4194 },{
4195 .name = "copy-on-read",
4196 .type = QEMU_OPT_BOOL,
4197 .help = "copy read data from backing file into image file",
4198 },{
4199 .name = "detect-zeroes",
4200 .type = QEMU_OPT_STRING,
4201 .help = "try to optimize zero writes (off, on, unmap)",
4202 },
4203 { /* end of list */ }
4204 },
4205 };
4206
4207 QemuOptsList qemu_drive_opts = {
4208 .name = "drive",
4209 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4210 .desc = {
4211 /*
4212 * no elements => accept any params
4213 * validation will happen later
4214 */
4215 { /* end of list */ }
4216 },
4217 };
Ray Wang's QEMU Repository