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666daa68
MA		 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.
3618a094
MA		 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.
666daa68
MA		 31 */
32
26f54e9a 33#include "sysemu/block-backend.h"
9c17d615 34#include "sysemu/blockdev.h"
0d09e41a 35#include "hw/block/block.h"
737e150e 36#include "block/blockjob.h"
76f4afb4 37#include "block/throttle-groups.h"
83c9089e 38#include "monitor/monitor.h"
d49b6836 39#include "qemu/error-report.h"
1de7afc9
PB		 40#include "qemu/option.h"
41#include "qemu/config-file.h"
7b1b5d19 42#include "qapi/qmp/types.h"
d26c9a15 43#include "qapi-visit.h"
cc7a8ea7 44#include "qapi/qmp/qerror.h"
d26c9a15 45#include "qapi/qmp-output-visitor.h"
9e7dac7c 46#include "qapi/util.h"
9c17d615 47#include "sysemu/sysemu.h"
737e150e 48#include "block/block_int.h"
a4dea8a9 49#include "qmp-commands.h"
12bd451f 50#include "trace.h"
9c17d615 51#include "sysemu/arch_init.h"
666daa68 52
1960966d
MA		 53static const char *const if_name[IF_COUNT] = {
54 [IF_NONE] = "none",
55 [IF_IDE] = "ide",
56 [IF_SCSI] = "scsi",
57 [IF_FLOPPY] = "floppy",
58 [IF_PFLASH] = "pflash",
59 [IF_MTD] = "mtd",
60 [IF_SD] = "sd",
61 [IF_VIRTIO] = "virtio",
62 [IF_XEN] = "xen",
63};
64
21dff8cf 65static int if_max_devs[IF_COUNT] = {
27d6bf40
MA		 66 /*
67 * Do not change these numbers! They govern how drive option
68 * index maps to unit and bus. That mapping is ABI.
69 *
70 * All controllers used to imlement if=T drives need to support
71 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
72 * Otherwise, some index values map to "impossible" bus, unit
73 * values.
74 *
75 * For instance, if you change [IF_SCSI] to 255, -drive
76 * if=scsi,index=12 no longer means bus=1,unit=5, but
77 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
78 * the drive can't be set up. Regression.
79 */
80 [IF_IDE] = 2,
81 [IF_SCSI] = 7,
1960966d
MA		 82};
83
21dff8cf
JS		 84/**
85 * Boards may call this to offer board-by-board overrides
86 * of the default, global values.
87 */
88void override_max_devs(BlockInterfaceType type, int max_devs)
89{
18e46a03 90 BlockBackend *blk;
21dff8cf
JS		 91 DriveInfo *dinfo;
92
93 if (max_devs <= 0) {
94 return;
95 }
96
18e46a03
MA		 97 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
98 dinfo = blk_legacy_dinfo(blk);
21dff8cf
JS		 99 if (dinfo->type == type) {
100 fprintf(stderr, "Cannot override units-per-bus property of"
101 " the %s interface, because a drive of that type has"
102 " already been added.\n", if_name[type]);
103 g_assert_not_reached();
104 }
105 }
106
107 if_max_devs[type] = max_devs;
108}
109
14bafc54
MA		 110/*
111 * We automatically delete the drive when a device using it gets
112 * unplugged. Questionable feature, but we can't just drop it.
113 * Device models call blockdev_mark_auto_del() to schedule the
114 * automatic deletion, and generic qdev code calls blockdev_auto_del()
115 * when deletion is actually safe.
116 */
4be74634 117void blockdev_mark_auto_del(BlockBackend *blk)
14bafc54 118{
18e46a03 119 DriveInfo *dinfo = blk_legacy_dinfo(blk);
4be74634 120 BlockDriverState *bs = blk_bs(blk);
91fddb0d 121 AioContext *aio_context;
14bafc54 122
26f8b3a8 123 if (!dinfo) {
2d246f01
KW		 124 return;
125 }
126
5433c24f
HR		 127 if (bs) {
128 aio_context = bdrv_get_aio_context(bs);
129 aio_context_acquire(aio_context);
91fddb0d 130
5433c24f
HR		 131 if (bs->job) {
132 block_job_cancel(bs->job);
133 }
91fddb0d 134
5433c24f
HR		 135 aio_context_release(aio_context);
136 }
91fddb0d 137
26f8b3a8 138 dinfo->auto_del = 1;
14bafc54
MA		 139}
140
4be74634 141void blockdev_auto_del(BlockBackend *blk)
14bafc54 142{
18e46a03 143 DriveInfo *dinfo = blk_legacy_dinfo(blk);
14bafc54 144
0fc0f1fa 145 if (dinfo && dinfo->auto_del) {
b9fe8a7a 146 blk_unref(blk);
14bafc54
MA		 147 }
148}
149
d8f94e1b
JS		 150/**
151 * Returns the current mapping of how many units per bus
152 * a particular interface can support.
153 *
154 * A positive integer indicates n units per bus.
155 * 0 implies the mapping has not been established.
156 * -1 indicates an invalid BlockInterfaceType was given.
157 */
158int drive_get_max_devs(BlockInterfaceType type)
159{
160 if (type >= IF_IDE && type < IF_COUNT) {
161 return if_max_devs[type];
162 }
163
164 return -1;
165}
166
505a7fb1
MA		 167static int drive_index_to_bus_id(BlockInterfaceType type, int index)
168{
169 int max_devs = if_max_devs[type];
170 return max_devs ? index / max_devs : 0;
171}
172
173static int drive_index_to_unit_id(BlockInterfaceType type, int index)
174{
175 int max_devs = if_max_devs[type];
176 return max_devs ? index % max_devs : index;
177}
178
2292ddae
MA		 179QemuOpts *drive_def(const char *optstr)
180{
70b94331 181 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
2292ddae
MA		 182}
183
184QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
5645b0f4 185 const char *optstr)
666daa68 186{
666daa68
MA		 187 QemuOpts *opts;
188
2292ddae 189 opts = drive_def(optstr);
666daa68
MA		 190 if (!opts) {
191 return NULL;
192 }
2292ddae 193 if (type != IF_DEFAULT) {
f43e47db 194 qemu_opt_set(opts, "if", if_name[type], &error_abort);
2292ddae
MA		 195 }
196 if (index >= 0) {
a8b18f8f 197 qemu_opt_set_number(opts, "index", index, &error_abort);
2292ddae 198 }
666daa68 199 if (file)
f43e47db 200 qemu_opt_set(opts, "file", file, &error_abort);
666daa68
MA		 201 return opts;
202}
203
204DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
205{
18e46a03 206 BlockBackend *blk;
666daa68
MA		 207 DriveInfo *dinfo;
208
18e46a03
MA		 209 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
210 dinfo = blk_legacy_dinfo(blk);
211 if (dinfo && dinfo->type == type
212 && dinfo->bus == bus && dinfo->unit == unit) {
666daa68 213 return dinfo;
18e46a03 214 }
666daa68
MA		 215 }
216
217 return NULL;
218}
219
a66c9dc7
JS		 220bool drive_check_orphaned(void)
221{
18e46a03 222 BlockBackend *blk;
a66c9dc7
JS		 223 DriveInfo *dinfo;
224 bool rs = false;
225
18e46a03
MA		 226 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
227 dinfo = blk_legacy_dinfo(blk);
a66c9dc7
JS		 228 /* If dinfo->bdrv->dev is NULL, it has no device attached. */
229 /* Unless this is a default drive, this may be an oversight. */
a7f53e26 230 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
a66c9dc7
JS		 231 dinfo->type != IF_NONE) {
232 fprintf(stderr, "Warning: Orphaned drive without device: "
233 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
5433c24f
HR		 234 blk_name(blk), blk_bs(blk) ? blk_bs(blk)->filename : "",
235 if_name[dinfo->type], dinfo->bus, dinfo->unit);
a66c9dc7
JS		 236 rs = true;
237 }
238 }
239
240 return rs;
241}
242
f1bd51ac
MA		 243DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
244{
245 return drive_get(type,
246 drive_index_to_bus_id(type, index),
247 drive_index_to_unit_id(type, index));
248}
249
666daa68
MA		 250int drive_get_max_bus(BlockInterfaceType type)
251{
252 int max_bus;
18e46a03 253 BlockBackend *blk;
666daa68
MA		 254 DriveInfo *dinfo;
255
256 max_bus = -1;
18e46a03
MA		 257 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
258 dinfo = blk_legacy_dinfo(blk);
259 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
666daa68 260 max_bus = dinfo->bus;
18e46a03 261 }
666daa68
MA		 262 }
263 return max_bus;
264}
265
13839974
MA		 266/* Get a block device. This should only be used for single-drive devices
267 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
268 appropriate bus. */
269DriveInfo *drive_get_next(BlockInterfaceType type)
270{
271 static int next_block_unit[IF_COUNT];
272
273 return drive_get(type, 0, next_block_unit[type]++);
274}
275
666daa68
MA		 276static void bdrv_format_print(void *opaque, const char *name)
277{
807105a7 278 error_printf(" %s", name);
666daa68
MA		 279}
280
aa398a5c
SH		 281typedef struct {
282 QEMUBH *bh;
fa510ebf
FZ		 283 BlockDriverState *bs;
284} BDRVPutRefBH;
aa398a5c 285
b681072d 286static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
666daa68
MA		 287{
288 if (!strcmp(buf, "ignore")) {
92aa5c6d 289 return BLOCKDEV_ON_ERROR_IGNORE;
666daa68 290 } else if (!is_read && !strcmp(buf, "enospc")) {
92aa5c6d 291 return BLOCKDEV_ON_ERROR_ENOSPC;
666daa68 292 } else if (!strcmp(buf, "stop")) {
92aa5c6d 293 return BLOCKDEV_ON_ERROR_STOP;
666daa68 294 } else if (!strcmp(buf, "report")) {
92aa5c6d 295 return BLOCKDEV_ON_ERROR_REPORT;
666daa68 296 } else {
b681072d
KW		 297 error_setg(errp, "'%s' invalid %s error action",
298 buf, is_read ? "read" : "write");
666daa68
MA		 299 return -1;
300 }
301}
302
cc0681c4 303static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
0563e191 304{
cc0681c4
BC		 305 if (throttle_conflicting(cfg)) {
306 error_setg(errp, "bps/iops/max total values and read/write values"
307 " cannot be used at the same time");
0563e191
ZYW		 308 return false;
309 }
310
cc0681c4
BC		 311 if (!throttle_is_valid(cfg)) {
312 error_setg(errp, "bps/iops/maxs values must be 0 or greater");
7d81c141
SH		 313 return false;
314 }
315
ee2bdc33
SH		 316 if (throttle_max_is_missing_limit(cfg)) {
317 error_setg(errp, "bps_max/iops_max require corresponding"
318 " bps/iops values");
319 return false;
320 }
321
0563e191
ZYW		 322 return true;
323}
324
33cb7dc8
KW		 325typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
326
fbf8175e
HR		 327/* All parameters but @opts are optional and may be set to NULL. */
328static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
329 const char **throttling_group, ThrottleConfig *throttle_cfg,
330 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
331{
332 const char *discard;
333 Error *local_error = NULL;
334 const char *aio;
335
336 if (bdrv_flags) {
337 if (!qemu_opt_get_bool(opts, "read-only", false)) {
338 *bdrv_flags |= BDRV_O_RDWR;
339 }
340 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
341 *bdrv_flags |= BDRV_O_COPY_ON_READ;
342 }
343
344 if ((discard = qemu_opt_get(opts, "discard")) != NULL) {
345 if (bdrv_parse_discard_flags(discard, bdrv_flags) != 0) {
346 error_setg(errp, "Invalid discard option");
347 return;
348 }
349 }
350
351 if (qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true)) {
352 *bdrv_flags |= BDRV_O_CACHE_WB;
353 }
354 if (qemu_opt_get_bool(opts, BDRV_OPT_CACHE_DIRECT, false)) {
355 *bdrv_flags |= BDRV_O_NOCACHE;
356 }
357 if (qemu_opt_get_bool(opts, BDRV_OPT_CACHE_NO_FLUSH, false)) {
358 *bdrv_flags |= BDRV_O_NO_FLUSH;
359 }
360
361 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
362 if (!strcmp(aio, "native")) {
363 *bdrv_flags |= BDRV_O_NATIVE_AIO;
364 } else if (!strcmp(aio, "threads")) {
365 /* this is the default */
366 } else {
367 error_setg(errp, "invalid aio option");
368 return;
369 }
370 }
371 }
372
373 /* disk I/O throttling */
374 if (throttling_group) {
375 *throttling_group = qemu_opt_get(opts, "throttling.group");
376 }
377
378 if (throttle_cfg) {
379 memset(throttle_cfg, 0, sizeof(*throttle_cfg));
380 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
381 qemu_opt_get_number(opts, "throttling.bps-total", 0);
382 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
383 qemu_opt_get_number(opts, "throttling.bps-read", 0);
384 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
385 qemu_opt_get_number(opts, "throttling.bps-write", 0);
386 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
387 qemu_opt_get_number(opts, "throttling.iops-total", 0);
388 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
389 qemu_opt_get_number(opts, "throttling.iops-read", 0);
390 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
391 qemu_opt_get_number(opts, "throttling.iops-write", 0);
392
393 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
394 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
395 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
396 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
397 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
398 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
399 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
400 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
401 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
402 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
403 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
404 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
405
406 throttle_cfg->op_size =
407 qemu_opt_get_number(opts, "throttling.iops-size", 0);
408
409 if (!check_throttle_config(throttle_cfg, errp)) {
410 return;
411 }
412 }
413
414 if (detect_zeroes) {
415 *detect_zeroes =
416 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
417 qemu_opt_get(opts, "detect-zeroes"),
418 BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX,
419 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
420 &local_error);
421 if (local_error) {
422 error_propagate(errp, local_error);
423 return;
424 }
425
426 if (bdrv_flags &&
427 *detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
428 !(*bdrv_flags & BDRV_O_UNMAP))
429 {
430 error_setg(errp, "setting detect-zeroes to unmap is not allowed "
431 "without setting discard operation to unmap");
432 return;
433 }
434 }
435}
436
f298d071 437/* Takes the ownership of bs_opts */
18e46a03
MA		 438static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
439 Error **errp)
666daa68
MA		 440{
441 const char *buf;
666daa68
MA		 442 int bdrv_flags = 0;
443 int on_read_error, on_write_error;
26f54e9a 444 BlockBackend *blk;
a0f1eab1 445 BlockDriverState *bs;
cc0681c4 446 ThrottleConfig cfg;
666daa68 447 int snapshot = 0;
c546194f 448 Error *error = NULL;
0006383e 449 QemuOpts *opts;
0006383e 450 const char *id;
74fe54f2 451 bool has_driver_specific_opts;
fbf8175e
HR		 452 BlockdevDetectZeroesOptions detect_zeroes =
453 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
454 const char *throttling_group = NULL;
666daa68 455
f298d071
KW		 456 /* Check common options by copying from bs_opts to opts, all other options
457 * stay in bs_opts for processing by bdrv_open(). */
458 id = qdict_get_try_str(bs_opts, "id");
0006383e 459 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
84d18f06 460 if (error) {
b681072d 461 error_propagate(errp, error);
6376f952 462 goto err_no_opts;
0006383e
KW		 463 }
464
0006383e 465 qemu_opts_absorb_qdict(opts, bs_opts, &error);
84d18f06 466 if (error) {
b681072d 467 error_propagate(errp, error);
ec9c10d2 468 goto early_err;
0006383e
KW		 469 }
470
471 if (id) {
472 qdict_del(bs_opts, "id");
473 }
474
74fe54f2
KW		 475 has_driver_specific_opts = !!qdict_size(bs_opts);
476
666daa68 477 /* extract parameters */
666daa68 478 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
666daa68 479
fbf8175e
HR		 480 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
481 &detect_zeroes, &error);
482 if (error) {
483 error_propagate(errp, error);
484 goto early_err;
666daa68 485 }
666daa68
MA		 486
487 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
c8057f95
PM		 488 if (is_help_option(buf)) {
489 error_printf("Supported formats:");
490 bdrv_iterate_format(bdrv_format_print, NULL);
491 error_printf("\n");
ec9c10d2 492 goto early_err;
666daa68 493 }
74fe54f2 494
e4342ce5
HR		 495 if (qdict_haskey(bs_opts, "driver")) {
496 error_setg(errp, "Cannot specify both 'driver' and 'format'");
ec9c10d2 497 goto early_err;
6db5f5d6 498 }
e4342ce5 499 qdict_put(bs_opts, "driver", qstring_from_str(buf));
666daa68
MA		 500 }
501
92aa5c6d 502 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
666daa68 503 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
b681072d 504 on_write_error = parse_block_error_action(buf, 0, &error);
84d18f06 505 if (error) {
b681072d 506 error_propagate(errp, error);
ec9c10d2 507 goto early_err;
666daa68
MA		 508 }
509 }
510
92aa5c6d 511 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
666daa68 512 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
b681072d 513 on_read_error = parse_block_error_action(buf, 1, &error);
84d18f06 514 if (error) {
b681072d 515 error_propagate(errp, error);
ec9c10d2 516 goto early_err;
666daa68
MA		 517 }
518 }
519
5ec18f8c
HR		 520 if (snapshot) {
521 /* always use cache=unsafe with snapshot */
522 bdrv_flags &= ~BDRV_O_CACHE_MASK;
523 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
524 }
525
326642bc 526 /* init */
e4342ce5 527 if ((!file || !*file) && !has_driver_specific_opts) {
5ec18f8c
HR		 528 BlockBackendRootState *blk_rs;
529
530 blk = blk_new(qemu_opts_id(opts), errp);
e4342ce5
HR		 531 if (!blk) {
532 goto early_err;
533 }
abd7f68d 534
5ec18f8c
HR		 535 blk_rs = blk_get_root_state(blk);
536 blk_rs->open_flags = bdrv_flags;
fbf8175e 537 blk_rs->read_only = !(bdrv_flags & BDRV_O_RDWR);
5ec18f8c
HR		 538 blk_rs->detect_zeroes = detect_zeroes;
539
540 if (throttle_enabled(&cfg)) {
541 if (!throttling_group) {
542 throttling_group = blk_name(blk);
543 }
544 blk_rs->throttle_group = g_strdup(throttling_group);
545 blk_rs->throttle_state = throttle_group_incref(throttling_group);
546 blk_rs->throttle_state->cfg = cfg;
547 }
0563e191 548
e4342ce5
HR		 549 QDECREF(bs_opts);
550 } else {
551 if (file && !*file) {
c2ad1b0c 552 file = NULL;
c2ad1b0c 553 }
666daa68 554
e4342ce5
HR		 555 blk = blk_new_open(qemu_opts_id(opts), file, NULL, bs_opts, bdrv_flags,
556 errp);
557 if (!blk) {
558 goto err_no_bs_opts;
559 }
560 bs = blk_bs(blk);
ed9d4205 561
5ec18f8c 562 bs->detect_zeroes = detect_zeroes;
666daa68 563
5ec18f8c
HR		 564 /* disk I/O throttling */
565 if (throttle_enabled(&cfg)) {
566 if (!throttling_group) {
567 throttling_group = blk_name(blk);
568 }
569 bdrv_io_limits_enable(bs, throttling_group);
570 bdrv_set_io_limits(bs, &cfg);
571 }
0006383e 572
5ec18f8c
HR		 573 if (bdrv_key_required(bs)) {
574 autostart = 0;
76f4afb4 575 }
666daa68
MA		 576 }
577
5ec18f8c 578 blk_set_on_error(blk, on_read_error, on_write_error);
0006383e 579
e4342ce5 580err_no_bs_opts:
0006383e 581 qemu_opts_del(opts);
18e46a03 582 return blk;
a9ae2bff 583
ec9c10d2 584early_err:
ec9c10d2 585 qemu_opts_del(opts);
6376f952
MA		 586err_no_opts:
587 QDECREF(bs_opts);
a9ae2bff 588 return NULL;
666daa68
MA		 589}
590
bd745e23
HR		 591static QemuOptsList qemu_root_bds_opts;
592
593/* Takes the ownership of bs_opts */
594static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
595{
596 BlockDriverState *bs;
597 QemuOpts *opts;
598 Error *local_error = NULL;
599 BlockdevDetectZeroesOptions detect_zeroes;
600 int ret;
601 int bdrv_flags = 0;
602
603 opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp);
604 if (!opts) {
605 goto fail;
606 }
607
608 qemu_opts_absorb_qdict(opts, bs_opts, &local_error);
609 if (local_error) {
610 error_propagate(errp, local_error);
611 goto fail;
612 }
613
614 extract_common_blockdev_options(opts, &bdrv_flags, NULL, NULL,
615 &detect_zeroes, &local_error);
616 if (local_error) {
617 error_propagate(errp, local_error);
618 goto fail;
619 }
620
621 bs = NULL;
622 ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, errp);
623 if (ret < 0) {
624 goto fail_no_bs_opts;
625 }
626
627 bs->detect_zeroes = detect_zeroes;
628
629fail_no_bs_opts:
630 qemu_opts_del(opts);
631 return bs;
632
633fail:
634 qemu_opts_del(opts);
635 QDECREF(bs_opts);
636 return NULL;
637}
638
5abbf0ee
KW		 639static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
640 Error **errp)
57975222
KW		 641{
642 const char *value;
643
644 value = qemu_opt_get(opts, from);
645 if (value) {
5abbf0ee
KW		 646 if (qemu_opt_find(opts, to)) {
647 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
648 "same time", to, from);
649 return;
650 }
20d6cd47
JL		 651 }
652
653 /* rename all items in opts */
654 while ((value = qemu_opt_get(opts, from))) {
f43e47db 655 qemu_opt_set(opts, to, value, &error_abort);
57975222
KW		 656 qemu_opt_unset(opts, from);
657 }
658}
659
33cb7dc8
KW		 660QemuOptsList qemu_legacy_drive_opts = {
661 .name = "drive",
662 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
663 .desc = {
664 {
87a899c5
KW		 665 .name = "bus",
666 .type = QEMU_OPT_NUMBER,
667 .help = "bus number",
668 },{
669 .name = "unit",
670 .type = QEMU_OPT_NUMBER,
671 .help = "unit number (i.e. lun for scsi)",
672 },{
673 .name = "index",
674 .type = QEMU_OPT_NUMBER,
675 .help = "index number",
676 },{
33cb7dc8
KW		 677 .name = "media",
678 .type = QEMU_OPT_STRING,
679 .help = "media type (disk, cdrom)",
593d464b
KW		 680 },{
681 .name = "if",
682 .type = QEMU_OPT_STRING,
683 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
b41a7338
KW		 684 },{
685 .name = "cyls",
686 .type = QEMU_OPT_NUMBER,
687 .help = "number of cylinders (ide disk geometry)",
688 },{
689 .name = "heads",
690 .type = QEMU_OPT_NUMBER,
691 .help = "number of heads (ide disk geometry)",
692 },{
693 .name = "secs",
694 .type = QEMU_OPT_NUMBER,
695 .help = "number of sectors (ide disk geometry)",
696 },{
697 .name = "trans",
698 .type = QEMU_OPT_STRING,
699 .help = "chs translation (auto, lba, none)",
26929298
KW		 700 },{
701 .name = "boot",
702 .type = QEMU_OPT_BOOL,
703 .help = "(deprecated, ignored)",
394c7d4d
KW		 704 },{
705 .name = "addr",
706 .type = QEMU_OPT_STRING,
707 .help = "pci address (virtio only)",
bcf83158
KW		 708 },{
709 .name = "serial",
710 .type = QEMU_OPT_STRING,
711 .help = "disk serial number",
d095b465
HR		 712 },{
713 .name = "file",
714 .type = QEMU_OPT_STRING,
715 .help = "file name",
33cb7dc8 716 },
0ebd24e0
KW		 717
718 /* Options that are passed on, but have special semantics with -drive */
719 {
720 .name = "read-only",
721 .type = QEMU_OPT_BOOL,
722 .help = "open drive file as read-only",
ee13ed1c
KW		 723 },{
724 .name = "rerror",
725 .type = QEMU_OPT_STRING,
726 .help = "read error action",
727 },{
728 .name = "werror",
729 .type = QEMU_OPT_STRING,
730 .help = "write error action",
0ebd24e0
KW		 731 },{
732 .name = "copy-on-read",
733 .type = QEMU_OPT_BOOL,
734 .help = "copy read data from backing file into image file",
735 },
736
33cb7dc8
KW		 737 { /* end of list */ }
738 },
739};
740
60e19e06 741DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
57975222 742{
29c4e2b5 743 const char *value;
18e46a03 744 BlockBackend *blk;
33cb7dc8 745 DriveInfo *dinfo = NULL;
f298d071 746 QDict *bs_opts;
33cb7dc8
KW		 747 QemuOpts *legacy_opts;
748 DriveMediaType media = MEDIA_DISK;
593d464b 749 BlockInterfaceType type;
b41a7338 750 int cyls, heads, secs, translation;
87a899c5 751 int max_devs, bus_id, unit_id, index;
394c7d4d 752 const char *devaddr;
ee13ed1c 753 const char *werror, *rerror;
a7fdbcf0
FZ		 754 bool read_only = false;
755 bool copy_on_read;
bcf83158 756 const char *serial;
d095b465 757 const char *filename;
33cb7dc8 758 Error *local_err = NULL;
247147fb 759 int i;
29c4e2b5 760
57975222 761 /* Change legacy command line options into QMP ones */
247147fb
KW		 762 static const struct {
763 const char *from;
764 const char *to;
765 } opt_renames[] = {
766 { "iops", "throttling.iops-total" },
767 { "iops_rd", "throttling.iops-read" },
768 { "iops_wr", "throttling.iops-write" },
57975222 769
247147fb
KW		 770 { "bps", "throttling.bps-total" },
771 { "bps_rd", "throttling.bps-read" },
772 { "bps_wr", "throttling.bps-write" },
57975222 773
247147fb
KW		 774 { "iops_max", "throttling.iops-total-max" },
775 { "iops_rd_max", "throttling.iops-read-max" },
776 { "iops_wr_max", "throttling.iops-write-max" },
3e9fab69 777
247147fb
KW		 778 { "bps_max", "throttling.bps-total-max" },
779 { "bps_rd_max", "throttling.bps-read-max" },
780 { "bps_wr_max", "throttling.bps-write-max" },
3e9fab69 781
247147fb 782 { "iops_size", "throttling.iops-size" },
2024c1df 783
76f4afb4
AG		 784 { "group", "throttling.group" },
785
247147fb
KW		 786 { "readonly", "read-only" },
787 };
788
789 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
5abbf0ee
KW		 790 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
791 &local_err);
792 if (local_err) {
565f65d2 793 error_report_err(local_err);
5abbf0ee
KW		 794 return NULL;
795 }
247147fb 796 }
0f227a94 797
29c4e2b5
KW		 798 value = qemu_opt_get(all_opts, "cache");
799 if (value) {
800 int flags = 0;
801
802 if (bdrv_parse_cache_flags(value, &flags) != 0) {
803 error_report("invalid cache option");
804 return NULL;
805 }
806
807 /* Specific options take precedence */
54861b92
KW		 808 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
809 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
cccb7967 810 !!(flags & BDRV_O_CACHE_WB), &error_abort);
29c4e2b5 811 }
54861b92
KW		 812 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
813 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
cccb7967 814 !!(flags & BDRV_O_NOCACHE), &error_abort);
29c4e2b5 815 }
54861b92
KW		 816 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
817 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
cccb7967 818 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
29c4e2b5
KW		 819 }
820 qemu_opt_unset(all_opts, "cache");
821 }
822
f298d071
KW		 823 /* Get a QDict for processing the options */
824 bs_opts = qdict_new();
825 qemu_opts_to_qdict(all_opts, bs_opts);
826
87ea75d5
PC		 827 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
828 &error_abort);
33cb7dc8 829 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
84d18f06 830 if (local_err) {
565f65d2 831 error_report_err(local_err);
33cb7dc8
KW		 832 goto fail;
833 }
834
26929298
KW		 835 /* Deprecated option boot=[on|off] */
836 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
837 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
838 "ignored. Future versions will reject this parameter. Please "
839 "update your scripts.\n");
840 }
841
33cb7dc8
KW		 842 /* Media type */
843 value = qemu_opt_get(legacy_opts, "media");
844 if (value) {
845 if (!strcmp(value, "disk")) {
846 media = MEDIA_DISK;
847 } else if (!strcmp(value, "cdrom")) {
848 media = MEDIA_CDROM;
a7fdbcf0 849 read_only = true;
33cb7dc8
KW		 850 } else {
851 error_report("'%s' invalid media", value);
852 goto fail;
853 }
854 }
855
0ebd24e0 856 /* copy-on-read is disabled with a warning for read-only devices */
a7fdbcf0 857 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
0ebd24e0
KW		 858 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
859
860 if (read_only && copy_on_read) {
861 error_report("warning: disabling copy-on-read on read-only drive");
862 copy_on_read = false;
863 }
864
865 qdict_put(bs_opts, "read-only",
866 qstring_from_str(read_only ? "on" : "off"));
867 qdict_put(bs_opts, "copy-on-read",
868 qstring_from_str(copy_on_read ? "on" :"off"));
869
593d464b
KW		 870 /* Controller type */
871 value = qemu_opt_get(legacy_opts, "if");
872 if (value) {
873 for (type = 0;
874 type < IF_COUNT && strcmp(value, if_name[type]);
875 type++) {
876 }
877 if (type == IF_COUNT) {
878 error_report("unsupported bus type '%s'", value);
879 goto fail;
880 }
881 } else {
882 type = block_default_type;
883 }
884
b41a7338
KW		 885 /* Geometry */
886 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
887 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
888 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
889
890 if (cyls || heads || secs) {
891 if (cyls < 1) {
892 error_report("invalid physical cyls number");
893 goto fail;
894 }
895 if (heads < 1) {
896 error_report("invalid physical heads number");
897 goto fail;
898 }
899 if (secs < 1) {
900 error_report("invalid physical secs number");
901 goto fail;
902 }
903 }
904
905 translation = BIOS_ATA_TRANSLATION_AUTO;
906 value = qemu_opt_get(legacy_opts, "trans");
907 if (value != NULL) {
908 if (!cyls) {
909 error_report("'%s' trans must be used with cyls, heads and secs",
910 value);
911 goto fail;
912 }
913 if (!strcmp(value, "none")) {
914 translation = BIOS_ATA_TRANSLATION_NONE;
915 } else if (!strcmp(value, "lba")) {
916 translation = BIOS_ATA_TRANSLATION_LBA;
f31c41ff
PB		 917 } else if (!strcmp(value, "large")) {
918 translation = BIOS_ATA_TRANSLATION_LARGE;
919 } else if (!strcmp(value, "rechs")) {
920 translation = BIOS_ATA_TRANSLATION_RECHS;
b41a7338
KW		 921 } else if (!strcmp(value, "auto")) {
922 translation = BIOS_ATA_TRANSLATION_AUTO;
923 } else {
924 error_report("'%s' invalid translation type", value);
925 goto fail;
926 }
927 }
928
929 if (media == MEDIA_CDROM) {
930 if (cyls || secs || heads) {
931 error_report("CHS can't be set with media=cdrom");
932 goto fail;
933 }
934 }
935
87a899c5
KW		 936 /* Device address specified by bus/unit or index.
937 * If none was specified, try to find the first free one. */
938 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
939 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
940 index = qemu_opt_get_number(legacy_opts, "index", -1);
941
942 max_devs = if_max_devs[type];
943
944 if (index != -1) {
945 if (bus_id != 0 || unit_id != -1) {
946 error_report("index cannot be used with bus and unit");
947 goto fail;
948 }
949 bus_id = drive_index_to_bus_id(type, index);
950 unit_id = drive_index_to_unit_id(type, index);
951 }
952
953 if (unit_id == -1) {
954 unit_id = 0;
955 while (drive_get(type, bus_id, unit_id) != NULL) {
956 unit_id++;
957 if (max_devs && unit_id >= max_devs) {
958 unit_id -= max_devs;
959 bus_id++;
960 }
961 }
962 }
963
964 if (max_devs && unit_id >= max_devs) {
965 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
966 goto fail;
967 }
968
969 if (drive_get(type, bus_id, unit_id) != NULL) {
970 error_report("drive with bus=%d, unit=%d (index=%d) exists",
971 bus_id, unit_id, index);
972 goto fail;
973 }
974
bcf83158
KW		 975 /* Serial number */
976 serial = qemu_opt_get(legacy_opts, "serial");
977
87a899c5
KW		 978 /* no id supplied -> create one */
979 if (qemu_opts_id(all_opts) == NULL) {
980 char *new_id;
981 const char *mediastr = "";
982 if (type == IF_IDE || type == IF_SCSI) {
983 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
984 }
985 if (max_devs) {
986 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
987 mediastr, unit_id);
988 } else {
989 new_id = g_strdup_printf("%s%s%i", if_name[type],
990 mediastr, unit_id);
991 }
992 qdict_put(bs_opts, "id", qstring_from_str(new_id));
993 g_free(new_id);
994 }
995
394c7d4d
KW		 996 /* Add virtio block device */
997 devaddr = qemu_opt_get(legacy_opts, "addr");
998 if (devaddr && type != IF_VIRTIO) {
999 error_report("addr is not supported by this bus type");
1000 goto fail;
1001 }
1002
1003 if (type == IF_VIRTIO) {
1004 QemuOpts *devopts;
87ea75d5
PC		 1005 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
1006 &error_abort);
394c7d4d 1007 if (arch_type == QEMU_ARCH_S390X) {
1f68f1d3 1008 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
394c7d4d 1009 } else {
f43e47db 1010 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
394c7d4d 1011 }
f43e47db
MA		 1012 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
1013 &error_abort);
394c7d4d 1014 if (devaddr) {
f43e47db 1015 qemu_opt_set(devopts, "addr", devaddr, &error_abort);
394c7d4d
KW		 1016 }
1017 }
1018
d095b465
HR		 1019 filename = qemu_opt_get(legacy_opts, "file");
1020
ee13ed1c
KW		 1021 /* Check werror/rerror compatibility with if=... */
1022 werror = qemu_opt_get(legacy_opts, "werror");
1023 if (werror != NULL) {
1024 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
1025 type != IF_NONE) {
1026 error_report("werror is not supported by this bus type");
1027 goto fail;
1028 }
1029 qdict_put(bs_opts, "werror", qstring_from_str(werror));
1030 }
1031
1032 rerror = qemu_opt_get(legacy_opts, "rerror");
1033 if (rerror != NULL) {
1034 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
1035 type != IF_NONE) {
1036 error_report("rerror is not supported by this bus type");
1037 goto fail;
1038 }
1039 qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
1040 }
1041
2d246f01 1042 /* Actual block device init: Functionality shared with blockdev-add */
18e46a03 1043 blk = blockdev_init(filename, bs_opts, &local_err);
3cb0e25c 1044 bs_opts = NULL;
18e46a03 1045 if (!blk) {
84d18f06 1046 if (local_err) {
565f65d2 1047 error_report_err(local_err);
b681072d 1048 }
2d246f01 1049 goto fail;
b681072d 1050 } else {
84d18f06 1051 assert(!local_err);
2d246f01
KW		 1052 }
1053
26f8b3a8
MA		 1054 /* Create legacy DriveInfo */
1055 dinfo = g_malloc0(sizeof(*dinfo));
f298d071 1056 dinfo->opts = all_opts;
2d246f01 1057
b41a7338
KW		 1058 dinfo->cyls = cyls;
1059 dinfo->heads = heads;
1060 dinfo->secs = secs;
1061 dinfo->trans = translation;
1062
ee13ed1c 1063 dinfo->type = type;
87a899c5
KW		 1064 dinfo->bus = bus_id;
1065 dinfo->unit = unit_id;
394c7d4d 1066 dinfo->devaddr = devaddr;
bcf83158
KW		 1067 dinfo->serial = g_strdup(serial);
1068
26f8b3a8
MA		 1069 blk_set_legacy_dinfo(blk, dinfo);
1070
e34ef046
KW		 1071 switch(type) {
1072 case IF_IDE:
1073 case IF_SCSI:
1074 case IF_XEN:
1075 case IF_NONE:
1076 dinfo->media_cd = media == MEDIA_CDROM;
1077 break;
1078 default:
1079 break;
1080 }
1081
2d246f01 1082fail:
33cb7dc8 1083 qemu_opts_del(legacy_opts);
3cb0e25c 1084 QDECREF(bs_opts);
2d246f01 1085 return dinfo;
57975222
KW		 1086}
1087
3e5a50d6 1088void hmp_commit(Monitor *mon, const QDict *qdict)
666daa68 1089{
666daa68 1090 const char *device = qdict_get_str(qdict, "device");
a0e8544c 1091 BlockBackend *blk;
e8877497 1092 int ret;
666daa68 1093
6ab4b5ab 1094 if (!strcmp(device, "all")) {
e8877497 1095 ret = bdrv_commit_all();
6ab4b5ab 1096 } else {
84aa0140
SH		 1097 BlockDriverState *bs;
1098 AioContext *aio_context;
1099
a0e8544c
FZ		 1100 blk = blk_by_name(device);
1101 if (!blk) {
58513bde 1102 monitor_printf(mon, "Device '%s' not found\n", device);
ac59eb95 1103 return;
6ab4b5ab 1104 }
5433c24f
HR		 1105 if (!blk_is_available(blk)) {
1106 monitor_printf(mon, "Device '%s' has no medium\n", device);
1107 return;
1108 }
84aa0140
SH		 1109
1110 bs = blk_bs(blk);
1111 aio_context = bdrv_get_aio_context(bs);
1112 aio_context_acquire(aio_context);
1113
1114 ret = bdrv_commit(bs);
1115
1116 aio_context_release(aio_context);
58513bde
JC		 1117 }
1118 if (ret < 0) {
1119 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1120 strerror(-ret));
666daa68
MA		 1121 }
1122}
1123
6a8f9661
EB		 1124static void blockdev_do_action(TransactionActionKind type, void *data,
1125 Error **errp)
6cc2a415 1126{
c8a83e85
KW		 1127 TransactionAction action;
1128 TransactionActionList list;
6cc2a415 1129
6a8f9661
EB		 1130 action.type = type;
1131 action.u.data = data;
6cc2a415
PB		 1132 list.value = &action;
1133 list.next = NULL;
1134 qmp_transaction(&list, errp);
1135}
1136
0901f67e
BC		 1137void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1138 bool has_node_name, const char *node_name,
1139 const char *snapshot_file,
1140 bool has_snapshot_node_name,
1141 const char *snapshot_node_name,
6106e249 1142 bool has_format, const char *format,
0901f67e 1143 bool has_mode, NewImageMode mode, Error **errp)
f8882568 1144{
a911e6ae 1145 BlockdevSnapshotSync snapshot = {
0901f67e 1146 .has_device = has_device,
6cc2a415 1147 .device = (char *) device,
0901f67e
BC		 1148 .has_node_name = has_node_name,
1149 .node_name = (char *) node_name,
6cc2a415 1150 .snapshot_file = (char *) snapshot_file,
0901f67e
BC		 1151 .has_snapshot_node_name = has_snapshot_node_name,
1152 .snapshot_node_name = (char *) snapshot_node_name,
6cc2a415
PB		 1153 .has_format = has_format,
1154 .format = (char *) format,
1155 .has_mode = has_mode,
1156 .mode = mode,
1157 };
c8a83e85
KW		 1158 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
1159 &snapshot, errp);
f8882568
JS		 1160}
1161
43de7e2d
AG		 1162void qmp_blockdev_snapshot(const char *node, const char *overlay,
1163 Error **errp)
1164{
1165 BlockdevSnapshot snapshot_data = {
1166 .node = (char *) node,
1167 .overlay = (char *) overlay
1168 };
1169
1170 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
1171 &snapshot_data, errp);
1172}
1173
f323bc9e
WX		 1174void qmp_blockdev_snapshot_internal_sync(const char *device,
1175 const char *name,
1176 Error **errp)
1177{
1178 BlockdevSnapshotInternal snapshot = {
1179 .device = (char *) device,
1180 .name = (char *) name
1181 };
1182
1183 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
1184 &snapshot, errp);
1185}
1186
44e3e053
WX		 1187SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1188 bool has_id,
1189 const char *id,
1190 bool has_name,
1191 const char *name,
1192 Error **errp)
1193{
a0e8544c
FZ		 1194 BlockDriverState *bs;
1195 BlockBackend *blk;
4ef3982a 1196 AioContext *aio_context;
44e3e053
WX		 1197 QEMUSnapshotInfo sn;
1198 Error *local_err = NULL;
1199 SnapshotInfo *info = NULL;
1200 int ret;
1201
a0e8544c
FZ		 1202 blk = blk_by_name(device);
1203 if (!blk) {
75158ebb
MA		 1204 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1205 "Device '%s' not found", device);
44e3e053
WX		 1206 return NULL;
1207 }
5433c24f
HR		 1208
1209 aio_context = blk_get_aio_context(blk);
1210 aio_context_acquire(aio_context);
44e3e053
WX		 1211
1212 if (!has_id) {
1213 id = NULL;
1214 }
1215
1216 if (!has_name) {
1217 name = NULL;
1218 }
1219
1220 if (!id && !name) {
1221 error_setg(errp, "Name or id must be provided");
5433c24f 1222 goto out_aio_context;
44e3e053
WX		 1223 }
1224
5433c24f
HR		 1225 if (!blk_is_available(blk)) {
1226 error_setg(errp, "Device '%s' has no medium", device);
1227 goto out_aio_context;
1228 }
1229 bs = blk_bs(blk);
4ef3982a 1230
0b928854
SH		 1231 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1232 goto out_aio_context;
1233 }
1234
44e3e053 1235 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
84d18f06 1236 if (local_err) {
44e3e053 1237 error_propagate(errp, local_err);
4ef3982a 1238 goto out_aio_context;
44e3e053
WX		 1239 }
1240 if (!ret) {
1241 error_setg(errp,
1242 "Snapshot with id '%s' and name '%s' does not exist on "
1243 "device '%s'",
1244 STR_OR_NULL(id), STR_OR_NULL(name), device);
4ef3982a 1245 goto out_aio_context;
44e3e053
WX		 1246 }
1247
1248 bdrv_snapshot_delete(bs, id, name, &local_err);
84d18f06 1249 if (local_err) {
44e3e053 1250 error_propagate(errp, local_err);
4ef3982a 1251 goto out_aio_context;
44e3e053
WX		 1252 }
1253
4ef3982a
SH		 1254 aio_context_release(aio_context);
1255
5839e53b 1256 info = g_new0(SnapshotInfo, 1);
44e3e053
WX		 1257 info->id = g_strdup(sn.id_str);
1258 info->name = g_strdup(sn.name);
1259 info->date_nsec = sn.date_nsec;
1260 info->date_sec = sn.date_sec;
1261 info->vm_state_size = sn.vm_state_size;
1262 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1263 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1264
1265 return info;
4ef3982a
SH		 1266
1267out_aio_context:
1268 aio_context_release(aio_context);
1269 return NULL;
44e3e053 1270}
8802d1fd 1271
341ebc2f
JS		 1272/**
1273 * block_dirty_bitmap_lookup:
1274 * Return a dirty bitmap (if present), after validating
1275 * the node reference and bitmap names.
1276 *
1277 * @node: The name of the BDS node to search for bitmaps
1278 * @name: The name of the bitmap to search for
1279 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1280 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1281 * @errp: Output pointer for error information. Can be NULL.
1282 *
1283 * @return: A bitmap object on success, or NULL on failure.
1284 */
1285static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1286 const char *name,
1287 BlockDriverState **pbs,
1288 AioContext **paio,
1289 Error **errp)
1290{
1291 BlockDriverState *bs;
1292 BdrvDirtyBitmap *bitmap;
1293 AioContext *aio_context;
1294
1295 if (!node) {
1296 error_setg(errp, "Node cannot be NULL");
1297 return NULL;
1298 }
1299 if (!name) {
1300 error_setg(errp, "Bitmap name cannot be NULL");
1301 return NULL;
1302 }
1303 bs = bdrv_lookup_bs(node, node, NULL);
1304 if (!bs) {
1305 error_setg(errp, "Node '%s' not found", node);
1306 return NULL;
1307 }
1308
1309 aio_context = bdrv_get_aio_context(bs);
1310 aio_context_acquire(aio_context);
1311
1312 bitmap = bdrv_find_dirty_bitmap(bs, name);
1313 if (!bitmap) {
1314 error_setg(errp, "Dirty bitmap '%s' not found", name);
1315 goto fail;
1316 }
1317
1318 if (pbs) {
1319 *pbs = bs;
1320 }
1321 if (paio) {
1322 *paio = aio_context;
1323 } else {
1324 aio_context_release(aio_context);
1325 }
1326
1327 return bitmap;
1328
1329 fail:
1330 aio_context_release(aio_context);
1331 return NULL;
1332}
1333
b756b9ce 1334/* New and old BlockDriverState structs for atomic group operations */
ba0c86a3 1335
50f43f0f 1336typedef struct BlkActionState BlkActionState;
ba0c86a3 1337
50f43f0f
JS		 1338/**
1339 * BlkActionOps:
1340 * Table of operations that define an Action.
1341 *
1342 * @instance_size: Size of state struct, in bytes.
1343 * @prepare: Prepare the work, must NOT be NULL.
1344 * @commit: Commit the changes, can be NULL.
1345 * @abort: Abort the changes on fail, can be NULL.
1346 * @clean: Clean up resources after all transaction actions have called
1347 * commit() or abort(). Can be NULL.
1348 *
1349 * Only prepare() may fail. In a single transaction, only one of commit() or
1350 * abort() will be called. clean() will always be called if it is present.
1351 */
1352typedef struct BlkActionOps {
ba0c86a3 1353 size_t instance_size;
50f43f0f
JS		 1354 void (*prepare)(BlkActionState *common, Error **errp);
1355 void (*commit)(BlkActionState *common);
1356 void (*abort)(BlkActionState *common);
1357 void (*clean)(BlkActionState *common);
1358} BlkActionOps;
ba0c86a3 1359
50f43f0f
JS		 1360/**
1361 * BlkActionState:
1362 * Describes one Action's state within a Transaction.
1363 *
1364 * @action: QAPI-defined enum identifying which Action to perform.
1365 * @ops: Table of ActionOps this Action can perform.
1366 * @entry: List membership for all Actions in this Transaction.
1367 *
1368 * This structure must be arranged as first member in a subclassed type,
1369 * assuming that the compiler will also arrange it to the same offsets as the
1370 * base class.
ba0c86a3 1371 */
50f43f0f 1372struct BlkActionState {
c8a83e85 1373 TransactionAction *action;
50f43f0f
JS		 1374 const BlkActionOps *ops;
1375 QSIMPLEQ_ENTRY(BlkActionState) entry;
ba0c86a3
WX		 1376};
1377
bbe86010
WX		 1378/* internal snapshot private data */
1379typedef struct InternalSnapshotState {
50f43f0f 1380 BlkActionState common;
bbe86010 1381 BlockDriverState *bs;
5d6e96ef 1382 AioContext *aio_context;
bbe86010 1383 QEMUSnapshotInfo sn;
507306cc 1384 bool created;
bbe86010
WX		 1385} InternalSnapshotState;
1386
50f43f0f 1387static void internal_snapshot_prepare(BlkActionState *common,
bbe86010
WX		 1388 Error **errp)
1389{
f70edf99 1390 Error *local_err = NULL;
bbe86010
WX		 1391 const char *device;
1392 const char *name;
a0e8544c 1393 BlockBackend *blk;
bbe86010
WX		 1394 BlockDriverState *bs;
1395 QEMUSnapshotInfo old_sn, *sn;
1396 bool ret;
1397 qemu_timeval tv;
1398 BlockdevSnapshotInternal *internal;
1399 InternalSnapshotState *state;
1400 int ret1;
1401
6a8f9661 1402 g_assert(common->action->type ==
bbe86010 1403 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
6a8f9661 1404 internal = common->action->u.blockdev_snapshot_internal_sync;
bbe86010
WX		 1405 state = DO_UPCAST(InternalSnapshotState, common, common);
1406
1407 /* 1. parse input */
1408 device = internal->device;
1409 name = internal->name;
1410
1411 /* 2. check for validation */
a0e8544c
FZ		 1412 blk = blk_by_name(device);
1413 if (!blk) {
75158ebb
MA		 1414 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1415 "Device '%s' not found", device);
bbe86010
WX		 1416 return;
1417 }
1418
5d6e96ef 1419 /* AioContext is released in .clean() */
5433c24f 1420 state->aio_context = blk_get_aio_context(blk);
5d6e96ef
SH		 1421 aio_context_acquire(state->aio_context);
1422
5433c24f 1423 if (!blk_is_available(blk)) {
c6bd8c70 1424 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
bbe86010
WX		 1425 return;
1426 }
5433c24f 1427 bs = blk_bs(blk);
bbe86010 1428
507306cc
FZ		 1429 state->bs = bs;
1430 bdrv_drained_begin(bs);
1431
3dc7ca3c
SH		 1432 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
1433 return;
1434 }
1435
bbe86010 1436 if (bdrv_is_read_only(bs)) {
81e5f78a 1437 error_setg(errp, "Device '%s' is read only", device);
bbe86010
WX		 1438 return;
1439 }
1440
1441 if (!bdrv_can_snapshot(bs)) {
81e5f78a
AG		 1442 error_setg(errp, "Block format '%s' used by device '%s' "
1443 "does not support internal snapshots",
1444 bs->drv->format_name, device);
bbe86010
WX		 1445 return;
1446 }
1447
1448 if (!strlen(name)) {
1449 error_setg(errp, "Name is empty");
1450 return;
1451 }
1452
1453 /* check whether a snapshot with name exist */
f70edf99
MA		 1454 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1455 &local_err);
1456 if (local_err) {
1457 error_propagate(errp, local_err);
bbe86010
WX		 1458 return;
1459 } else if (ret) {
1460 error_setg(errp,
1461 "Snapshot with name '%s' already exists on device '%s'",
1462 name, device);
1463 return;
1464 }
1465
1466 /* 3. take the snapshot */
1467 sn = &state->sn;
1468 pstrcpy(sn->name, sizeof(sn->name), name);
1469 qemu_gettimeofday(&tv);
1470 sn->date_sec = tv.tv_sec;
1471 sn->date_nsec = tv.tv_usec * 1000;
1472 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1473
1474 ret1 = bdrv_snapshot_create(bs, sn);
1475 if (ret1 < 0) {
1476 error_setg_errno(errp, -ret1,
1477 "Failed to create snapshot '%s' on device '%s'",
1478 name, device);
1479 return;
1480 }
1481
1482 /* 4. succeed, mark a snapshot is created */
507306cc 1483 state->created = true;
bbe86010
WX		 1484}
1485
50f43f0f 1486static void internal_snapshot_abort(BlkActionState *common)
bbe86010
WX		 1487{
1488 InternalSnapshotState *state =
1489 DO_UPCAST(InternalSnapshotState, common, common);
1490 BlockDriverState *bs = state->bs;
1491 QEMUSnapshotInfo *sn = &state->sn;
1492 Error *local_error = NULL;
1493
507306cc 1494 if (!state->created) {
bbe86010
WX		 1495 return;
1496 }
1497
1498 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
1499 error_report("Failed to delete snapshot with id '%s' and name '%s' on "
1500 "device '%s' in abort: %s",
1501 sn->id_str,
1502 sn->name,
1503 bdrv_get_device_name(bs),
1504 error_get_pretty(local_error));
1505 error_free(local_error);
1506 }
1507}
1508
50f43f0f 1509static void internal_snapshot_clean(BlkActionState *common)
5d6e96ef
SH		 1510{
1511 InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
1512 common, common);
1513
1514 if (state->aio_context) {
507306cc
FZ		 1515 if (state->bs) {
1516 bdrv_drained_end(state->bs);
1517 }
5d6e96ef
SH		 1518 aio_context_release(state->aio_context);
1519 }
1520}
1521
ba0c86a3 1522/* external snapshot private data */
ba5d6ab6 1523typedef struct ExternalSnapshotState {
50f43f0f 1524 BlkActionState common;
8802d1fd
JC		 1525 BlockDriverState *old_bs;
1526 BlockDriverState *new_bs;
5d6e96ef 1527 AioContext *aio_context;
ba5d6ab6 1528} ExternalSnapshotState;
8802d1fd 1529
50f43f0f 1530static void external_snapshot_prepare(BlkActionState *common,
9b9877ee
WX		 1531 Error **errp)
1532{
43de7e2d
AG		 1533 int flags = 0, ret;
1534 QDict *options = NULL;
9b9877ee 1535 Error *local_err = NULL;
43de7e2d 1536 /* Device and node name of the image to generate the snapshot from */
e2a31e87 1537 const char *device;
0901f67e 1538 const char *node_name;
43de7e2d
AG		 1539 /* Reference to the new image (for 'blockdev-snapshot') */
1540 const char *snapshot_ref;
1541 /* File name of the new image (for 'blockdev-snapshot-sync') */
e2a31e87 1542 const char *new_image_file;
ba5d6ab6
SH		 1543 ExternalSnapshotState *state =
1544 DO_UPCAST(ExternalSnapshotState, common, common);
c8a83e85 1545 TransactionAction *action = common->action;
9b9877ee 1546
43de7e2d
AG		 1547 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1548 * purpose but a different set of parameters */
1549 switch (action->type) {
1550 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
1551 {
1552 BlockdevSnapshot *s = action->u.blockdev_snapshot;
1553 device = s->node;
1554 node_name = s->node;
1555 new_image_file = NULL;
1556 snapshot_ref = s->overlay;
1557 }
1558 break;
1559 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
1560 {
1561 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync;
1562 device = s->has_device ? s->device : NULL;
1563 node_name = s->has_node_name ? s->node_name : NULL;
1564 new_image_file = s->snapshot_file;
1565 snapshot_ref = NULL;
1566 }
1567 break;
1568 default:
1569 g_assert_not_reached();
e2a31e87
WX		 1570 }
1571
1572 /* start processing */
43de7e2d
AG		 1573 state->old_bs = bdrv_lookup_bs(device, node_name, errp);
1574 if (!state->old_bs) {
9b9877ee
WX		 1575 return;
1576 }
1577
5d6e96ef
SH		 1578 /* Acquire AioContext now so any threads operating on old_bs stop */
1579 state->aio_context = bdrv_get_aio_context(state->old_bs);
1580 aio_context_acquire(state->aio_context);
da763e83 1581 bdrv_drained_begin(state->old_bs);
5d6e96ef 1582
ba5d6ab6 1583 if (!bdrv_is_inserted(state->old_bs)) {
c6bd8c70 1584 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
9b9877ee
WX		 1585 return;
1586 }
1587
3718d8ab
FZ		 1588 if (bdrv_op_is_blocked(state->old_bs,
1589 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
9b9877ee
WX		 1590 return;
1591 }
1592
ba5d6ab6
SH		 1593 if (!bdrv_is_read_only(state->old_bs)) {
1594 if (bdrv_flush(state->old_bs)) {
c6bd8c70 1595 error_setg(errp, QERR_IO_ERROR);
9b9877ee
WX		 1596 return;
1597 }
1598 }
1599
212a5a8f 1600 if (!bdrv_is_first_non_filter(state->old_bs)) {
c6bd8c70 1601 error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
f6186f49
BC		 1602 return;
1603 }
1604
43de7e2d
AG		 1605 if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
1606 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync;
1607 const char *format = s->has_format ? s->format : "qcow2";
1608 enum NewImageMode mode;
1609 const char *snapshot_node_name =
1610 s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
9b9877ee 1611
43de7e2d
AG		 1612 if (node_name && !snapshot_node_name) {
1613 error_setg(errp, "New snapshot node name missing");
9b9877ee
WX		 1614 return;
1615 }
9b9877ee 1616
43de7e2d
AG		 1617 if (snapshot_node_name &&
1618 bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
1619 error_setg(errp, "New snapshot node name already in use");
1620 return;
1621 }
1622
1623 flags = state->old_bs->open_flags;
1624
1625 /* create new image w/backing file */
1626 mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1627 if (mode != NEW_IMAGE_MODE_EXISTING) {
1628 bdrv_img_create(new_image_file, format,
1629 state->old_bs->filename,
1630 state->old_bs->drv->format_name,
1631 NULL, -1, flags, &local_err, false);
1632 if (local_err) {
1633 error_propagate(errp, local_err);
1634 return;
1635 }
1636 }
1637
1638 options = qdict_new();
1639 if (s->has_snapshot_node_name) {
1640 qdict_put(options, "node-name",
1641 qstring_from_str(snapshot_node_name));
1642 }
1643 qdict_put(options, "driver", qstring_from_str(format));
1644
1645 flags |= BDRV_O_NO_BACKING;
0901f67e
BC		 1646 }
1647
f67503e5 1648 assert(state->new_bs == NULL);
43de7e2d
AG		 1649 ret = bdrv_open(&state->new_bs, new_image_file, snapshot_ref, options,
1650 flags, errp);
f67503e5 1651 /* We will manually add the backing_hd field to the bs later */
9b9877ee 1652 if (ret != 0) {
43de7e2d
AG		 1653 return;
1654 }
1655
1656 if (state->new_bs->blk != NULL) {
1657 error_setg(errp, "The snapshot is already in use by %s",
1658 blk_name(state->new_bs->blk));
1659 return;
1660 }
1661
1662 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1663 errp)) {
1664 return;
1665 }
1666
1667 if (state->new_bs->backing != NULL) {
1668 error_setg(errp, "The snapshot already has a backing image");
08b24cfe
AG		 1669 return;
1670 }
1671
1672 if (!state->new_bs->drv->supports_backing) {
1673 error_setg(errp, "The snapshot does not support backing images");
9b9877ee
WX		 1674 }
1675}
1676
50f43f0f 1677static void external_snapshot_commit(BlkActionState *common)
3b0047e8 1678{
ba5d6ab6
SH		 1679 ExternalSnapshotState *state =
1680 DO_UPCAST(ExternalSnapshotState, common, common);
ba0c86a3 1681
5d6e96ef
SH		 1682 bdrv_set_aio_context(state->new_bs, state->aio_context);
1683
ba5d6ab6
SH		 1684 /* This removes our old bs and adds the new bs */
1685 bdrv_append(state->new_bs, state->old_bs);
3b0047e8
WX		 1686 /* We don't need (or want) to use the transactional
1687 * bdrv_reopen_multiple() across all the entries at once, because we
1688 * don't want to abort all of them if one of them fails the reopen */
dd62f1ca 1689 bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
3b0047e8
WX		 1690 NULL);
1691}
1692
50f43f0f 1693static void external_snapshot_abort(BlkActionState *common)
96b86bf7 1694{
ba5d6ab6
SH		 1695 ExternalSnapshotState *state =
1696 DO_UPCAST(ExternalSnapshotState, common, common);
1697 if (state->new_bs) {
4f6fd349 1698 bdrv_unref(state->new_bs);
96b86bf7 1699 }
da763e83
FZ		 1700}
1701
50f43f0f 1702static void external_snapshot_clean(BlkActionState *common)
da763e83
FZ		 1703{
1704 ExternalSnapshotState *state =
1705 DO_UPCAST(ExternalSnapshotState, common, common);
5d6e96ef 1706 if (state->aio_context) {
da763e83 1707 bdrv_drained_end(state->old_bs);
5d6e96ef
SH		 1708 aio_context_release(state->aio_context);
1709 }
96b86bf7
WX		 1710}
1711
3037f364 1712typedef struct DriveBackupState {
50f43f0f 1713 BlkActionState common;
3037f364 1714 BlockDriverState *bs;
5d6e96ef 1715 AioContext *aio_context;
3037f364
SH		 1716 BlockJob *job;
1717} DriveBackupState;
1718
50f43f0f 1719static void drive_backup_prepare(BlkActionState *common, Error **errp)
3037f364
SH		 1720{
1721 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
a0e8544c 1722 BlockBackend *blk;
3037f364
SH		 1723 DriveBackup *backup;
1724 Error *local_err = NULL;
1725
6a8f9661
EB		 1726 assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1727 backup = common->action->u.drive_backup;
3037f364 1728
a0e8544c
FZ		 1729 blk = blk_by_name(backup->device);
1730 if (!blk) {
75158ebb
MA		 1731 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1732 "Device '%s' not found", backup->device);
5d6e96ef
SH		 1733 return;
1734 }
1735
1fdd4b7b
FZ		 1736 if (!blk_is_available(blk)) {
1737 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1738 return;
1739 }
1740
5d6e96ef 1741 /* AioContext is released in .clean() */
5433c24f 1742 state->aio_context = blk_get_aio_context(blk);
5d6e96ef 1743 aio_context_acquire(state->aio_context);
1fdd4b7b
FZ		 1744 bdrv_drained_begin(blk_bs(blk));
1745 state->bs = blk_bs(blk);
5d6e96ef 1746
3037f364
SH		 1747 qmp_drive_backup(backup->device, backup->target,
1748 backup->has_format, backup->format,
b53169ea 1749 backup->sync,
3037f364
SH		 1750 backup->has_mode, backup->mode,
1751 backup->has_speed, backup->speed,
d58d8453 1752 backup->has_bitmap, backup->bitmap,
3037f364
SH		 1753 backup->has_on_source_error, backup->on_source_error,
1754 backup->has_on_target_error, backup->on_target_error,
1755 &local_err);
84d18f06 1756 if (local_err) {
3037f364 1757 error_propagate(errp, local_err);
3037f364
SH		 1758 return;
1759 }
1760
3037f364
SH		 1761 state->job = state->bs->job;
1762}
1763
50f43f0f 1764static void drive_backup_abort(BlkActionState *common)
3037f364
SH		 1765{
1766 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1767 BlockDriverState *bs = state->bs;
1768
1769 /* Only cancel if it's the job we started */
1770 if (bs && bs->job && bs->job == state->job) {
1771 block_job_cancel_sync(bs->job);
1772 }
1773}
1774
50f43f0f 1775static void drive_backup_clean(BlkActionState *common)
5d6e96ef
SH		 1776{
1777 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1778
1779 if (state->aio_context) {
1fdd4b7b 1780 bdrv_drained_end(state->bs);
5d6e96ef
SH		 1781 aio_context_release(state->aio_context);
1782 }
1783}
1784
bd8baecd 1785typedef struct BlockdevBackupState {
50f43f0f 1786 BlkActionState common;
bd8baecd
FZ		 1787 BlockDriverState *bs;
1788 BlockJob *job;
1789 AioContext *aio_context;
1790} BlockdevBackupState;
1791
50f43f0f 1792static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
bd8baecd
FZ		 1793{
1794 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1795 BlockdevBackup *backup;
5433c24f 1796 BlockBackend *blk, *target;
bd8baecd
FZ		 1797 Error *local_err = NULL;
1798
6a8f9661
EB		 1799 assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
1800 backup = common->action->u.blockdev_backup;
bd8baecd 1801
a0e8544c
FZ		 1802 blk = blk_by_name(backup->device);
1803 if (!blk) {
5b347c54 1804 error_setg(errp, "Device '%s' not found", backup->device);
bd8baecd
FZ		 1805 return;
1806 }
1807
ff52bf36
FZ		 1808 if (!blk_is_available(blk)) {
1809 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1810 return;
1811 }
1812
5433c24f
HR		 1813 target = blk_by_name(backup->target);
1814 if (!target) {
5b347c54 1815 error_setg(errp, "Device '%s' not found", backup->target);
bd8baecd
FZ		 1816 return;
1817 }
1818
1819 /* AioContext is released in .clean() */
5433c24f
HR		 1820 state->aio_context = blk_get_aio_context(blk);
1821 if (state->aio_context != blk_get_aio_context(target)) {
bd8baecd
FZ		 1822 state->aio_context = NULL;
1823 error_setg(errp, "Backup between two IO threads is not implemented");
1824 return;
1825 }
1826 aio_context_acquire(state->aio_context);
ff52bf36
FZ		 1827 state->bs = blk_bs(blk);
1828 bdrv_drained_begin(state->bs);
bd8baecd
FZ		 1829
1830 qmp_blockdev_backup(backup->device, backup->target,
1831 backup->sync,
1832 backup->has_speed, backup->speed,
1833 backup->has_on_source_error, backup->on_source_error,
1834 backup->has_on_target_error, backup->on_target_error,
1835 &local_err);
1836 if (local_err) {
1837 error_propagate(errp, local_err);
1838 return;
1839 }
1840
bd8baecd
FZ		 1841 state->job = state->bs->job;
1842}
1843
50f43f0f 1844static void blockdev_backup_abort(BlkActionState *common)
bd8baecd
FZ		 1845{
1846 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1847 BlockDriverState *bs = state->bs;
1848
1849 /* Only cancel if it's the job we started */
1850 if (bs && bs->job && bs->job == state->job) {
1851 block_job_cancel_sync(bs->job);
1852 }
1853}
1854
50f43f0f 1855static void blockdev_backup_clean(BlkActionState *common)
bd8baecd
FZ		 1856{
1857 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1858
1859 if (state->aio_context) {
ff52bf36 1860 bdrv_drained_end(state->bs);
bd8baecd
FZ		 1861 aio_context_release(state->aio_context);
1862 }
1863}
1864
df9a681d 1865typedef struct BlockDirtyBitmapState {
50f43f0f 1866 BlkActionState common;
df9a681d
FZ		 1867 BdrvDirtyBitmap *bitmap;
1868 BlockDriverState *bs;
1869 AioContext *aio_context;
1870 HBitmap *backup;
1871 bool prepared;
1872} BlockDirtyBitmapState;
1873
50f43f0f 1874static void block_dirty_bitmap_add_prepare(BlkActionState *common,
df9a681d
FZ		 1875 Error **errp)
1876{
1877 Error *local_err = NULL;
1878 BlockDirtyBitmapAdd *action;
1879 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1880 common, common);
1881
50f43f0f 1882 action = common->action->u.block_dirty_bitmap_add;
df9a681d
FZ		 1883 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
1884 qmp_block_dirty_bitmap_add(action->node, action->name,
1885 action->has_granularity, action->granularity,
1886 &local_err);
1887
1888 if (!local_err) {
1889 state->prepared = true;
1890 } else {
1891 error_propagate(errp, local_err);
1892 }
1893}
1894
50f43f0f 1895static void block_dirty_bitmap_add_abort(BlkActionState *common)
df9a681d
FZ		 1896{
1897 BlockDirtyBitmapAdd *action;
1898 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1899 common, common);
1900
50f43f0f 1901 action = common->action->u.block_dirty_bitmap_add;
df9a681d
FZ		 1902 /* Should not be able to fail: IF the bitmap was added via .prepare(),
1903 * then the node reference and bitmap name must have been valid.
1904 */
1905 if (state->prepared) {
1906 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
1907 }
1908}
1909
50f43f0f 1910static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
df9a681d
FZ		 1911 Error **errp)
1912{
1913 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1914 common, common);
1915 BlockDirtyBitmap *action;
1916
50f43f0f 1917 action = common->action->u.block_dirty_bitmap_clear;
df9a681d
FZ		 1918 state->bitmap = block_dirty_bitmap_lookup(action->node,
1919 action->name,
1920 &state->bs,
1921 &state->aio_context,
1922 errp);
1923 if (!state->bitmap) {
1924 return;
1925 }
1926
1927 if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
1928 error_setg(errp, "Cannot modify a frozen bitmap");
1929 return;
1930 } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
1931 error_setg(errp, "Cannot clear a disabled bitmap");
1932 return;
1933 }
1934
1935 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
1936 /* AioContext is released in .clean() */
1937}
1938
50f43f0f 1939static void block_dirty_bitmap_clear_abort(BlkActionState *common)
df9a681d
FZ		 1940{
1941 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1942 common, common);
1943
1944 bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
1945}
1946
50f43f0f 1947static void block_dirty_bitmap_clear_commit(BlkActionState *common)
df9a681d
FZ		 1948{
1949 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1950 common, common);
1951
1952 hbitmap_free(state->backup);
1953}
1954
50f43f0f 1955static void block_dirty_bitmap_clear_clean(BlkActionState *common)
df9a681d
FZ		 1956{
1957 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1958 common, common);
1959
1960 if (state->aio_context) {
1961 aio_context_release(state->aio_context);
1962 }
1963}
1964
50f43f0f 1965static void abort_prepare(BlkActionState *common, Error **errp)
78b18b78
SH		 1966{
1967 error_setg(errp, "Transaction aborted using Abort action");
1968}
1969
50f43f0f 1970static void abort_commit(BlkActionState *common)
78b18b78 1971{
dfc6f865 1972 g_assert_not_reached(); /* this action never succeeds */
78b18b78
SH		 1973}
1974
50f43f0f 1975static const BlkActionOps actions[] = {
43de7e2d
AG		 1976 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
1977 .instance_size = sizeof(ExternalSnapshotState),
1978 .prepare = external_snapshot_prepare,
1979 .commit = external_snapshot_commit,
1980 .abort = external_snapshot_abort,
1981 },
c8a83e85 1982 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
ba5d6ab6 1983 .instance_size = sizeof(ExternalSnapshotState),
ba0c86a3
WX		 1984 .prepare = external_snapshot_prepare,
1985 .commit = external_snapshot_commit,
1986 .abort = external_snapshot_abort,
da763e83 1987 .clean = external_snapshot_clean,
ba0c86a3 1988 },
3037f364
SH		 1989 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1990 .instance_size = sizeof(DriveBackupState),
1991 .prepare = drive_backup_prepare,
1992 .abort = drive_backup_abort,
5d6e96ef 1993 .clean = drive_backup_clean,
3037f364 1994 },
bd8baecd
FZ		 1995 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
1996 .instance_size = sizeof(BlockdevBackupState),
1997 .prepare = blockdev_backup_prepare,
1998 .abort = blockdev_backup_abort,
1999 .clean = blockdev_backup_clean,
2000 },
78b18b78 2001 [TRANSACTION_ACTION_KIND_ABORT] = {
50f43f0f 2002 .instance_size = sizeof(BlkActionState),
78b18b78
SH		 2003 .prepare = abort_prepare,
2004 .commit = abort_commit,
2005 },
bbe86010
WX		 2006 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2007 .instance_size = sizeof(InternalSnapshotState),
2008 .prepare = internal_snapshot_prepare,
2009 .abort = internal_snapshot_abort,
5d6e96ef 2010 .clean = internal_snapshot_clean,
bbe86010 2011 },
df9a681d
FZ		 2012 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2013 .instance_size = sizeof(BlockDirtyBitmapState),
2014 .prepare = block_dirty_bitmap_add_prepare,
2015 .abort = block_dirty_bitmap_add_abort,
2016 },
2017 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2018 .instance_size = sizeof(BlockDirtyBitmapState),
2019 .prepare = block_dirty_bitmap_clear_prepare,
2020 .commit = block_dirty_bitmap_clear_commit,
2021 .abort = block_dirty_bitmap_clear_abort,
2022 .clean = block_dirty_bitmap_clear_clean,
2023 }
ba0c86a3
WX		 2024};
2025
8802d1fd 2026/*
b756b9ce
SH		 2027 * 'Atomic' group operations. The operations are performed as a set, and if
2028 * any fail then we roll back all operations in the group.
8802d1fd 2029 */
c8a83e85 2030void qmp_transaction(TransactionActionList *dev_list, Error **errp)
8802d1fd 2031{
c8a83e85 2032 TransactionActionList *dev_entry = dev_list;
50f43f0f 2033 BlkActionState *state, *next;
43e17041 2034 Error *local_err = NULL;
8802d1fd 2035
50f43f0f 2036 QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
8802d1fd
JC		 2037 QSIMPLEQ_INIT(&snap_bdrv_states);
2038
b756b9ce 2039 /* drain all i/o before any operations */
8802d1fd
JC		 2040 bdrv_drain_all();
2041
b756b9ce 2042 /* We don't do anything in this loop that commits us to the operations */
8802d1fd 2043 while (NULL != dev_entry) {
c8a83e85 2044 TransactionAction *dev_info = NULL;
50f43f0f 2045 const BlkActionOps *ops;
52e7c241 2046
8802d1fd
JC		 2047 dev_info = dev_entry->value;
2048 dev_entry = dev_entry->next;
2049
6a8f9661 2050 assert(dev_info->type < ARRAY_SIZE(actions));
ba0c86a3 2051
6a8f9661 2052 ops = &actions[dev_info->type];
aa3fe714
HR		 2053 assert(ops->instance_size > 0);
2054
ba5d6ab6
SH		 2055 state = g_malloc0(ops->instance_size);
2056 state->ops = ops;
2057 state->action = dev_info;
2058 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
8802d1fd 2059
ba5d6ab6 2060 state->ops->prepare(state, &local_err);
84d18f06 2061 if (local_err) {
ba0c86a3
WX		 2062 error_propagate(errp, local_err);
2063 goto delete_and_fail;
8802d1fd 2064 }
8802d1fd
JC		 2065 }
2066
ba5d6ab6 2067 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
f9ea81e8
SH		 2068 if (state->ops->commit) {
2069 state->ops->commit(state);
2070 }
8802d1fd
JC		 2071 }
2072
2073 /* success */
2074 goto exit;
2075
2076delete_and_fail:
b756b9ce 2077 /* failure, and it is all-or-none; roll back all operations */
ba5d6ab6
SH		 2078 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2079 if (state->ops->abort) {
2080 state->ops->abort(state);
ba0c86a3 2081 }
8802d1fd
JC		 2082 }
2083exit:
ba5d6ab6
SH		 2084 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
2085 if (state->ops->clean) {
2086 state->ops->clean(state);
ba0c86a3 2087 }
ba5d6ab6 2088 g_free(state);
8802d1fd 2089 }
8802d1fd
JC		 2090}
2091
c245b6a3 2092void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
666daa68 2093{
38f54bd1 2094 Error *local_err = NULL;
666daa68 2095
38f54bd1
HR		 2096 qmp_blockdev_open_tray(device, has_force, force, &local_err);
2097 if (local_err) {
2098 error_propagate(errp, local_err);
c245b6a3 2099 return;
92d48558
LC		 2100 }
2101
38f54bd1 2102 qmp_blockdev_remove_medium(device, errp);
666daa68
MA		 2103}
2104
12d3ba82
BC		 2105void qmp_block_passwd(bool has_device, const char *device,
2106 bool has_node_name, const char *node_name,
2107 const char *password, Error **errp)
666daa68 2108{
12d3ba82 2109 Error *local_err = NULL;
666daa68 2110 BlockDriverState *bs;
e3442099 2111 AioContext *aio_context;
666daa68 2112
12d3ba82
BC		 2113 bs = bdrv_lookup_bs(has_device ? device : NULL,
2114 has_node_name ? node_name : NULL,
2115 &local_err);
84d18f06 2116 if (local_err) {
12d3ba82 2117 error_propagate(errp, local_err);
a4dea8a9 2118 return;
666daa68
MA		 2119 }
2120
e3442099
SH		 2121 aio_context = bdrv_get_aio_context(bs);
2122 aio_context_acquire(aio_context);
2123
4d2855a3 2124 bdrv_add_key(bs, password, errp);
e3442099 2125
e3442099 2126 aio_context_release(aio_context);
666daa68
MA		 2127}
2128
7d8a9f71
HR		 2129void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
2130 Error **errp)
2131{
2132 BlockBackend *blk;
2133 bool locked;
2134
2135 if (!has_force) {
2136 force = false;
2137 }
2138
2139 blk = blk_by_name(device);
2140 if (!blk) {
2141 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2142 "Device '%s' not found", device);
2143 return;
2144 }
2145
2146 if (!blk_dev_has_removable_media(blk)) {
2147 error_setg(errp, "Device '%s' is not removable", device);
2148 return;
2149 }
2150
2151 if (blk_dev_is_tray_open(blk)) {
2152 return;
2153 }
2154
2155 locked = blk_dev_is_medium_locked(blk);
2156 if (locked) {
2157 blk_dev_eject_request(blk, force);
2158 }
2159
2160 if (!locked || force) {
2161 blk_dev_change_media_cb(blk, false);
2162 }
2163}
2164
abaaf59d
HR		 2165void qmp_blockdev_close_tray(const char *device, Error **errp)
2166{
2167 BlockBackend *blk;
2168
2169 blk = blk_by_name(device);
2170 if (!blk) {
2171 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2172 "Device '%s' not found", device);
2173 return;
2174 }
2175
2176 if (!blk_dev_has_removable_media(blk)) {
2177 error_setg(errp, "Device '%s' is not removable", device);
2178 return;
2179 }
2180
2181 if (!blk_dev_is_tray_open(blk)) {
2182 return;
2183 }
2184
2185 blk_dev_change_media_cb(blk, true);
2186}
2187
2814f672
HR		 2188void qmp_blockdev_remove_medium(const char *device, Error **errp)
2189{
2190 BlockBackend *blk;
2191 BlockDriverState *bs;
2192 AioContext *aio_context;
2193 bool has_device;
2194
2195 blk = blk_by_name(device);
2196 if (!blk) {
2197 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2198 "Device '%s' not found", device);
2199 return;
2200 }
2201
2202 /* For BBs without a device, we can exchange the BDS tree at will */
2203 has_device = blk_get_attached_dev(blk);
2204
2205 if (has_device && !blk_dev_has_removable_media(blk)) {
2206 error_setg(errp, "Device '%s' is not removable", device);
2207 return;
2208 }
2209
2210 if (has_device && !blk_dev_is_tray_open(blk)) {
2211 error_setg(errp, "Tray of device '%s' is not open", device);
2212 return;
2213 }
2214
2215 bs = blk_bs(blk);
2216 if (!bs) {
2217 return;
2218 }
2219
2220 aio_context = bdrv_get_aio_context(bs);
2221 aio_context_acquire(aio_context);
2222
2223 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2224 goto out;
2225 }
2226
2227 /* This follows the convention established by bdrv_make_anon() */
2228 if (bs->device_list.tqe_prev) {
2229 QTAILQ_REMOVE(&bdrv_states, bs, device_list);
2230 bs->device_list.tqe_prev = NULL;
2231 }
2232
2233 blk_remove_bs(blk);
2234
2235out:
2236 aio_context_release(aio_context);
2237}
2238
d1299882
HR		 2239static void qmp_blockdev_insert_anon_medium(const char *device,
2240 BlockDriverState *bs, Error **errp)
2241{
2242 BlockBackend *blk;
2243 bool has_device;
2244
2245 blk = blk_by_name(device);
2246 if (!blk) {
2247 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2248 "Device '%s' not found", device);
2249 return;
2250 }
2251
2252 /* For BBs without a device, we can exchange the BDS tree at will */
2253 has_device = blk_get_attached_dev(blk);
2254
2255 if (has_device && !blk_dev_has_removable_media(blk)) {
2256 error_setg(errp, "Device '%s' is not removable", device);
2257 return;
2258 }
2259
2260 if (has_device && !blk_dev_is_tray_open(blk)) {
2261 error_setg(errp, "Tray of device '%s' is not open", device);
2262 return;
2263 }
2264
2265 if (blk_bs(blk)) {
2266 error_setg(errp, "There already is a medium in device '%s'", device);
2267 return;
2268 }
2269
2270 blk_insert_bs(blk, bs);
2271
2272 QTAILQ_INSERT_TAIL(&bdrv_states, bs, device_list);
2273}
2274
2275void qmp_blockdev_insert_medium(const char *device, const char *node_name,
2276 Error **errp)
2277{
2278 BlockDriverState *bs;
2279
2280 bs = bdrv_find_node(node_name);
2281 if (!bs) {
2282 error_setg(errp, "Node '%s' not found", node_name);
2283 return;
2284 }
2285
2286 if (bs->blk) {
2287 error_setg(errp, "Node '%s' is already in use by '%s'", node_name,
2288 blk_name(bs->blk));
2289 return;
2290 }
2291
2292 qmp_blockdev_insert_anon_medium(device, bs, errp);
2293}
2294
24fb4133
HR		 2295void qmp_blockdev_change_medium(const char *device, const char *filename,
2296 bool has_format, const char *format,
39ff43d9
HR		 2297 bool has_read_only,
2298 BlockdevChangeReadOnlyMode read_only,
24fb4133 2299 Error **errp)
de2c6c05
HR		 2300{
2301 BlockBackend *blk;
2302 BlockDriverState *medium_bs = NULL;
2303 int bdrv_flags, ret;
2304 QDict *options = NULL;
2305 Error *err = NULL;
2306
2307 blk = blk_by_name(device);
2308 if (!blk) {
2309 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2310 "Device '%s' not found", device);
2311 goto fail;
2312 }
2313
2314 if (blk_bs(blk)) {
2315 blk_update_root_state(blk);
2316 }
2317
2318 bdrv_flags = blk_get_open_flags_from_root_state(blk);
2319
39ff43d9
HR		 2320 if (!has_read_only) {
2321 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2322 }
2323
2324 switch (read_only) {
2325 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2326 break;
2327
2328 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2329 bdrv_flags &= ~BDRV_O_RDWR;
2330 break;
2331
2332 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2333 bdrv_flags |= BDRV_O_RDWR;
2334 break;
2335
2336 default:
2337 abort();
2338 }
2339
24fb4133 2340 if (has_format) {
de2c6c05
HR		 2341 options = qdict_new();
2342 qdict_put(options, "driver", qstring_from_str(format));
2343 }
2344
2345 assert(!medium_bs);
2346 ret = bdrv_open(&medium_bs, filename, NULL, options, bdrv_flags, errp);
2347 if (ret < 0) {
2348 goto fail;
2349 }
2350
2351 blk_apply_root_state(blk, medium_bs);
2352
2353 bdrv_add_key(medium_bs, NULL, &err);
2354 if (err) {
2355 error_propagate(errp, err);
2356 goto fail;
2357 }
2358
2359 qmp_blockdev_open_tray(device, false, false, &err);
2360 if (err) {
2361 error_propagate(errp, err);
2362 goto fail;
2363 }
2364
2365 qmp_blockdev_remove_medium(device, &err);
2366 if (err) {
2367 error_propagate(errp, err);
2368 goto fail;
2369 }
2370
2371 qmp_blockdev_insert_anon_medium(device, medium_bs, &err);
2372 if (err) {
2373 error_propagate(errp, err);
2374 goto fail;
2375 }
2376
2377 qmp_blockdev_close_tray(device, errp);
2378
2379fail:
2380 /* If the medium has been inserted, the device has its own reference, so
2381 * ours must be relinquished; and if it has not been inserted successfully,
2382 * the reference must be relinquished anyway */
2383 bdrv_unref(medium_bs);
2384}
2385
727f005e 2386/* throttling disk I/O limits */
80047da5 2387void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
3e9fab69
BC		 2388 int64_t bps_wr,
2389 int64_t iops,
2390 int64_t iops_rd,
2391 int64_t iops_wr,
2392 bool has_bps_max,
2393 int64_t bps_max,
2394 bool has_bps_rd_max,
2395 int64_t bps_rd_max,
2396 bool has_bps_wr_max,
2397 int64_t bps_wr_max,
2398 bool has_iops_max,
2399 int64_t iops_max,
2400 bool has_iops_rd_max,
2401 int64_t iops_rd_max,
2402 bool has_iops_wr_max,
2024c1df
BC		 2403 int64_t iops_wr_max,
2404 bool has_iops_size,
76f4afb4
AG		 2405 int64_t iops_size,
2406 bool has_group,
2407 const char *group, Error **errp)
727f005e 2408{
cc0681c4 2409 ThrottleConfig cfg;
727f005e 2410 BlockDriverState *bs;
a0e8544c 2411 BlockBackend *blk;
b15446fd 2412 AioContext *aio_context;
727f005e 2413
a0e8544c
FZ		 2414 blk = blk_by_name(device);
2415 if (!blk) {
75158ebb
MA		 2416 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2417 "Device '%s' not found", device);
80047da5 2418 return;
727f005e 2419 }
5433c24f
HR		 2420
2421 aio_context = blk_get_aio_context(blk);
2422 aio_context_acquire(aio_context);
2423
a0e8544c 2424 bs = blk_bs(blk);
5433c24f
HR		 2425 if (!bs) {
2426 error_setg(errp, "Device '%s' has no medium", device);
2427 goto out;
2428 }
727f005e 2429
cc0681c4
BC		 2430 memset(&cfg, 0, sizeof(cfg));
2431 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
2432 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
2433 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
2434
2435 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
2436 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
2437 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
2438
3e9fab69
BC		 2439 if (has_bps_max) {
2440 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
2441 }
2442 if (has_bps_rd_max) {
2443 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
2444 }
2445 if (has_bps_wr_max) {
2446 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
2447 }
2448 if (has_iops_max) {
2449 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
2450 }
2451 if (has_iops_rd_max) {
2452 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
2453 }
2454 if (has_iops_wr_max) {
2455 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
2456 }
727f005e 2457
2024c1df
BC		 2458 if (has_iops_size) {
2459 cfg.op_size = iops_size;
2460 }
cc0681c4
BC		 2461
2462 if (!check_throttle_config(&cfg, errp)) {
5433c24f 2463 goto out;
727f005e
ZYW		 2464 }
2465
76f4afb4
AG		 2466 if (throttle_enabled(&cfg)) {
2467 /* Enable I/O limits if they're not enabled yet, otherwise
2468 * just update the throttling group. */
a0d64a61 2469 if (!bs->throttle_state) {
76f4afb4
AG		 2470 bdrv_io_limits_enable(bs, has_group ? group : device);
2471 } else if (has_group) {
2472 bdrv_io_limits_update_group(bs, group);
2473 }
2474 /* Set the new throttling configuration */
cc0681c4 2475 bdrv_set_io_limits(bs, &cfg);
a0d64a61 2476 } else if (bs->throttle_state) {
76f4afb4
AG		 2477 /* If all throttling settings are set to 0, disable I/O limits */
2478 bdrv_io_limits_disable(bs);
727f005e 2479 }
b15446fd 2480
5433c24f 2481out:
b15446fd 2482 aio_context_release(aio_context);
727f005e
ZYW		 2483}
2484
341ebc2f
JS		 2485void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2486 bool has_granularity, uint32_t granularity,
2487 Error **errp)
2488{
2489 AioContext *aio_context;
2490 BlockDriverState *bs;
2491
2492 if (!name || name[0] == '\0') {
2493 error_setg(errp, "Bitmap name cannot be empty");
2494 return;
2495 }
2496
2497 bs = bdrv_lookup_bs(node, node, errp);
2498 if (!bs) {
2499 return;
2500 }
2501
2502 aio_context = bdrv_get_aio_context(bs);
2503 aio_context_acquire(aio_context);
2504
2505 if (has_granularity) {
2506 if (granularity < 512 || !is_power_of_2(granularity)) {
2507 error_setg(errp, "Granularity must be power of 2 "
2508 "and at least 512");
2509 goto out;
2510 }
2511 } else {
2512 /* Default to cluster size, if available: */
2513 granularity = bdrv_get_default_bitmap_granularity(bs);
2514 }
2515
2516 bdrv_create_dirty_bitmap(bs, granularity, name, errp);
2517
2518 out:
2519 aio_context_release(aio_context);
2520}
2521
2522void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2523 Error **errp)
2524{
2525 AioContext *aio_context;
2526 BlockDriverState *bs;
2527 BdrvDirtyBitmap *bitmap;
2528
2529 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2530 if (!bitmap || !bs) {
2531 return;
2532 }
2533
9bd2b08f
JS		 2534 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2535 error_setg(errp,
2536 "Bitmap '%s' is currently frozen and cannot be removed",
2537 name);
2538 goto out;
2539 }
20dca810 2540 bdrv_dirty_bitmap_make_anon(bitmap);
341ebc2f
JS		 2541 bdrv_release_dirty_bitmap(bs, bitmap);
2542
9bd2b08f 2543 out:
341ebc2f
JS		 2544 aio_context_release(aio_context);
2545}
2546
e74e6b78
JS		 2547/**
2548 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2549 * immediately after a full backup operation.
2550 */
2551void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2552 Error **errp)
2553{
2554 AioContext *aio_context;
2555 BdrvDirtyBitmap *bitmap;
2556 BlockDriverState *bs;
2557
2558 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2559 if (!bitmap || !bs) {
2560 return;
2561 }
2562
2563 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2564 error_setg(errp,
2565 "Bitmap '%s' is currently frozen and cannot be modified",
2566 name);
2567 goto out;
2568 } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
2569 error_setg(errp,
2570 "Bitmap '%s' is currently disabled and cannot be cleared",
2571 name);
2572 goto out;
2573 }
2574
df9a681d 2575 bdrv_clear_dirty_bitmap(bitmap, NULL);
e74e6b78
JS		 2576
2577 out:
2578 aio_context_release(aio_context);
2579}
2580
072ebe6b 2581void hmp_drive_del(Monitor *mon, const QDict *qdict)
9063f814
RH		 2582{
2583 const char *id = qdict_get_str(qdict, "id");
7e7d56d9 2584 BlockBackend *blk;
9063f814 2585 BlockDriverState *bs;
8ad4202b 2586 AioContext *aio_context;
3718d8ab 2587 Error *local_err = NULL;
9063f814 2588
7e7d56d9
MA		 2589 blk = blk_by_name(id);
2590 if (!blk) {
b1422f20 2591 error_report("Device '%s' not found", id);
072ebe6b 2592 return;
9063f814 2593 }
8ad4202b 2594
26f8b3a8 2595 if (!blk_legacy_dinfo(blk)) {
48f364dd
MA		 2596 error_report("Deleting device added with blockdev-add"
2597 " is not supported");
072ebe6b 2598 return;
48f364dd
MA		 2599 }
2600
5433c24f 2601 aio_context = blk_get_aio_context(blk);
8ad4202b
SH		 2602 aio_context_acquire(aio_context);
2603
5433c24f
HR		 2604 bs = blk_bs(blk);
2605 if (bs) {
2606 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
2607 error_report_err(local_err);
2608 aio_context_release(aio_context);
2609 return;
2610 }
9063f814 2611
5433c24f
HR		 2612 bdrv_close(bs);
2613 }
9063f814 2614
fa879d62 2615 /* if we have a device attached to this BlockDriverState
d22b2f41
RH		 2616 * then we need to make the drive anonymous until the device
2617 * can be removed. If this is a drive with no device backing
2618 * then we can just get rid of the block driver state right here.
2619 */
a7f53e26 2620 if (blk_get_attached_dev(blk)) {
3e5a50d6 2621 blk_hide_on_behalf_of_hmp_drive_del(blk);
293c51a6 2622 /* Further I/O must not pause the guest */
373340b2
HR		 2623 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
2624 BLOCKDEV_ON_ERROR_REPORT);
d22b2f41 2625 } else {
b9fe8a7a 2626 blk_unref(blk);
9063f814
RH		 2627 }
2628
8ad4202b 2629 aio_context_release(aio_context);
9063f814 2630}
6d4a2b3a 2631
3b1dbd11
BC		 2632void qmp_block_resize(bool has_device, const char *device,
2633 bool has_node_name, const char *node_name,
2634 int64_t size, Error **errp)
6d4a2b3a 2635{
3b1dbd11 2636 Error *local_err = NULL;
6d4a2b3a 2637 BlockDriverState *bs;
927e0e76 2638 AioContext *aio_context;
8732901e 2639 int ret;
6d4a2b3a 2640
3b1dbd11
BC		 2641 bs = bdrv_lookup_bs(has_device ? device : NULL,
2642 has_node_name ? node_name : NULL,
2643 &local_err);
84d18f06 2644 if (local_err) {
3b1dbd11
BC		 2645 error_propagate(errp, local_err);
2646 return;
2647 }
2648
927e0e76
SH		 2649 aio_context = bdrv_get_aio_context(bs);
2650 aio_context_acquire(aio_context);
2651
3b1dbd11 2652 if (!bdrv_is_first_non_filter(bs)) {
c6bd8c70 2653 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
927e0e76 2654 goto out;
6d4a2b3a
CH		 2655 }
2656
2657 if (size < 0) {
c6bd8c70 2658 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
927e0e76 2659 goto out;
6d4a2b3a
CH		 2660 }
2661
9c75e168 2662 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
c6bd8c70 2663 error_setg(errp, QERR_DEVICE_IN_USE, device);
927e0e76 2664 goto out;
9c75e168
JC		 2665 }
2666
92b7a08d
PL		 2667 /* complete all in-flight operations before resizing the device */
2668 bdrv_drain_all();
2669
8732901e
KW		 2670 ret = bdrv_truncate(bs, size);
2671 switch (ret) {
939a1cc3
SH		 2672 case 0:
2673 break;
2674 case -ENOMEDIUM:
c6bd8c70 2675 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
939a1cc3
SH		 2676 break;
2677 case -ENOTSUP:
c6bd8c70 2678 error_setg(errp, QERR_UNSUPPORTED);
939a1cc3
SH		 2679 break;
2680 case -EACCES:
81e5f78a 2681 error_setg(errp, "Device '%s' is read only", device);
939a1cc3
SH		 2682 break;
2683 case -EBUSY:
c6bd8c70 2684 error_setg(errp, QERR_DEVICE_IN_USE, device);
939a1cc3
SH		 2685 break;
2686 default:
8732901e 2687 error_setg_errno(errp, -ret, "Could not resize");
939a1cc3 2688 break;
6d4a2b3a 2689 }
927e0e76
SH		 2690
2691out:
2692 aio_context_release(aio_context);
6d4a2b3a 2693}
12bd451f 2694
9abf2dba 2695static void block_job_cb(void *opaque, int ret)
12bd451f 2696{
723c5d93
SH		 2697 /* Note that this function may be executed from another AioContext besides
2698 * the QEMU main loop. If you need to access anything that assumes the
2699 * QEMU global mutex, use a BH or introduce a mutex.
2700 */
2701
12bd451f 2702 BlockDriverState *bs = opaque;
bcada37b 2703 const char *msg = NULL;
12bd451f 2704
9abf2dba 2705 trace_block_job_cb(bs, bs->job, ret);
12bd451f
SH		 2706
2707 assert(bs->job);
bcada37b 2708
12bd451f 2709 if (ret < 0) {
bcada37b 2710 msg = strerror(-ret);
12bd451f
SH		 2711 }
2712
370521a1 2713 if (block_job_is_cancelled(bs->job)) {
bcada37b 2714 block_job_event_cancelled(bs->job);
370521a1 2715 } else {
bcada37b 2716 block_job_event_completed(bs->job, msg);
370521a1 2717 }
12bd451f
SH		 2718}
2719
13d8cc51
JC		 2720void qmp_block_stream(const char *device,
2721 bool has_base, const char *base,
2722 bool has_backing_file, const char *backing_file,
2723 bool has_speed, int64_t speed,
1d809098
PB		 2724 bool has_on_error, BlockdevOnError on_error,
2725 Error **errp)
12bd451f 2726{
a0e8544c 2727 BlockBackend *blk;
12bd451f 2728 BlockDriverState *bs;
c8c3080f 2729 BlockDriverState *base_bs = NULL;
f3e69beb 2730 AioContext *aio_context;
fd7f8c65 2731 Error *local_err = NULL;
13d8cc51 2732 const char *base_name = NULL;
12bd451f 2733
1d809098
PB		 2734 if (!has_on_error) {
2735 on_error = BLOCKDEV_ON_ERROR_REPORT;
2736 }
2737
a0e8544c
FZ		 2738 blk = blk_by_name(device);
2739 if (!blk) {
75158ebb
MA		 2740 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2741 "Device '%s' not found", device);
12bd451f
SH		 2742 return;
2743 }
2744
5433c24f 2745 aio_context = blk_get_aio_context(blk);
f3e69beb
SH		 2746 aio_context_acquire(aio_context);
2747
5433c24f
HR		 2748 if (!blk_is_available(blk)) {
2749 error_setg(errp, "Device '%s' has no medium", device);
2750 goto out;
2751 }
2752 bs = blk_bs(blk);
2753
628ff683 2754 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
f3e69beb 2755 goto out;
628ff683
FZ		 2756 }
2757
13d8cc51 2758 if (has_base) {
c8c3080f
MT		 2759 base_bs = bdrv_find_backing_image(bs, base);
2760 if (base_bs == NULL) {
c6bd8c70 2761 error_setg(errp, QERR_BASE_NOT_FOUND, base);
f3e69beb 2762 goto out;
c8c3080f 2763 }
f3e69beb 2764 assert(bdrv_get_aio_context(base_bs) == aio_context);
13d8cc51 2765 base_name = base;
12bd451f
SH		 2766 }
2767
13d8cc51
JC		 2768 /* if we are streaming the entire chain, the result will have no backing
2769 * file, and specifying one is therefore an error */
2770 if (base_bs == NULL && has_backing_file) {
2771 error_setg(errp, "backing file specified, but streaming the "
2772 "entire chain");
f3e69beb 2773 goto out;
13d8cc51
JC		 2774 }
2775
2776 /* backing_file string overrides base bs filename */
2777 base_name = has_backing_file ? backing_file : base_name;
2778
2779 stream_start(bs, base_bs, base_name, has_speed ? speed : 0,
1d809098 2780 on_error, block_job_cb, bs, &local_err);
84d18f06 2781 if (local_err) {
fd7f8c65 2782 error_propagate(errp, local_err);
f3e69beb 2783 goto out;
12bd451f
SH		 2784 }
2785
2786 trace_qmp_block_stream(bs, bs->job);
f3e69beb
SH		 2787
2788out:
2789 aio_context_release(aio_context);
12bd451f 2790}
2d47c6e9 2791
ed61fc10 2792void qmp_block_commit(const char *device,
7676e2c5
JC		 2793 bool has_base, const char *base,
2794 bool has_top, const char *top,
54e26900 2795 bool has_backing_file, const char *backing_file,
ed61fc10
JC		 2796 bool has_speed, int64_t speed,
2797 Error **errp)
2798{
a0e8544c 2799 BlockBackend *blk;
ed61fc10
JC		 2800 BlockDriverState *bs;
2801 BlockDriverState *base_bs, *top_bs;
9e85cd5c 2802 AioContext *aio_context;
ed61fc10
JC		 2803 Error *local_err = NULL;
2804 /* This will be part of the QMP command, if/when the
2805 * BlockdevOnError change for blkmirror makes it in
2806 */
92aa5c6d 2807 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
ed61fc10 2808
54504663
HR		 2809 if (!has_speed) {
2810 speed = 0;
2811 }
2812
7676e2c5
JC		 2813 /* Important Note:
2814 * libvirt relies on the DeviceNotFound error class in order to probe for
2815 * live commit feature versions; for this to work, we must make sure to
2816 * perform the device lookup before any generic errors that may occur in a
2817 * scenario in which all optional arguments are omitted. */
a0e8544c
FZ		 2818 blk = blk_by_name(device);
2819 if (!blk) {
75158ebb
MA		 2820 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2821 "Device '%s' not found", device);
ed61fc10 2822 return;
628ff683
FZ		 2823 }
2824
5433c24f 2825 aio_context = blk_get_aio_context(blk);
9e85cd5c
SH		 2826 aio_context_acquire(aio_context);
2827
5433c24f
HR		 2828 if (!blk_is_available(blk)) {
2829 error_setg(errp, "Device '%s' has no medium", device);
2830 goto out;
2831 }
2832 bs = blk_bs(blk);
2833
bb00021d 2834 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
9e85cd5c 2835 goto out;
ed61fc10 2836 }
ed61fc10
JC		 2837
2838 /* default top_bs is the active layer */
2839 top_bs = bs;
2840
7676e2c5 2841 if (has_top && top) {
ed61fc10
JC		 2842 if (strcmp(bs->filename, top) != 0) {
2843 top_bs = bdrv_find_backing_image(bs, top);
2844 }
2845 }
2846
2847 if (top_bs == NULL) {
2848 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
9e85cd5c 2849 goto out;
ed61fc10
JC		 2850 }
2851
9e85cd5c
SH		 2852 assert(bdrv_get_aio_context(top_bs) == aio_context);
2853
d5208c45
JC		 2854 if (has_base && base) {
2855 base_bs = bdrv_find_backing_image(top_bs, base);
2856 } else {
2857 base_bs = bdrv_find_base(top_bs);
2858 }
2859
2860 if (base_bs == NULL) {
c6bd8c70 2861 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
9e85cd5c 2862 goto out;
d5208c45
JC		 2863 }
2864
9e85cd5c
SH		 2865 assert(bdrv_get_aio_context(base_bs) == aio_context);
2866
bb00021d
FZ		 2867 if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
2868 goto out;
2869 }
2870
7676e2c5
JC		 2871 /* Do not allow attempts to commit an image into itself */
2872 if (top_bs == base_bs) {
2873 error_setg(errp, "cannot commit an image into itself");
9e85cd5c 2874 goto out;
7676e2c5
JC		 2875 }
2876
20a63d2c 2877 if (top_bs == bs) {
54e26900
JC		 2878 if (has_backing_file) {
2879 error_setg(errp, "'backing-file' specified,"
2880 " but 'top' is the active layer");
9e85cd5c 2881 goto out;
54e26900 2882 }
20a63d2c
FZ		 2883 commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
2884 bs, &local_err);
2885 } else {
2886 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
54e26900 2887 has_backing_file ? backing_file : NULL, &local_err);
20a63d2c 2888 }
ed61fc10
JC		 2889 if (local_err != NULL) {
2890 error_propagate(errp, local_err);
9e85cd5c 2891 goto out;
ed61fc10 2892 }
9e85cd5c
SH		 2893
2894out:
2895 aio_context_release(aio_context);
ed61fc10
JC		 2896}
2897
99a9addf
SH		 2898void qmp_drive_backup(const char *device, const char *target,
2899 bool has_format, const char *format,
b53169ea 2900 enum MirrorSyncMode sync,
99a9addf
SH		 2901 bool has_mode, enum NewImageMode mode,
2902 bool has_speed, int64_t speed,
d58d8453 2903 bool has_bitmap, const char *bitmap,
99a9addf
SH		 2904 bool has_on_source_error, BlockdevOnError on_source_error,
2905 bool has_on_target_error, BlockdevOnError on_target_error,
2906 Error **errp)
2907{
a0e8544c 2908 BlockBackend *blk;
99a9addf
SH		 2909 BlockDriverState *bs;
2910 BlockDriverState *target_bs;
fc5d3f84 2911 BlockDriverState *source = NULL;
d58d8453 2912 BdrvDirtyBitmap *bmap = NULL;
761731b1 2913 AioContext *aio_context;
e6641719 2914 QDict *options = NULL;
99a9addf
SH		 2915 Error *local_err = NULL;
2916 int flags;
2917 int64_t size;
2918 int ret;
2919
2920 if (!has_speed) {
2921 speed = 0;
2922 }
2923 if (!has_on_source_error) {
2924 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
2925 }
2926 if (!has_on_target_error) {
2927 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
2928 }
2929 if (!has_mode) {
2930 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
2931 }
2932
a0e8544c
FZ		 2933 blk = blk_by_name(device);
2934 if (!blk) {
75158ebb
MA		 2935 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2936 "Device '%s' not found", device);
99a9addf
SH		 2937 return;
2938 }
2939
5433c24f 2940 aio_context = blk_get_aio_context(blk);
761731b1
SH		 2941 aio_context_acquire(aio_context);
2942
c29c1dd3
FZ		 2943 /* Although backup_run has this check too, we need to use bs->drv below, so
2944 * do an early check redundantly. */
5433c24f 2945 if (!blk_is_available(blk)) {
c6bd8c70 2946 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
761731b1 2947 goto out;
99a9addf 2948 }
5433c24f 2949 bs = blk_bs(blk);
99a9addf
SH		 2950
2951 if (!has_format) {
2952 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
2953 }
99a9addf 2954
c29c1dd3 2955 /* Early check to avoid creating target */
3718d8ab 2956 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
761731b1 2957 goto out;
99a9addf
SH		 2958 }
2959
2960 flags = bs->open_flags | BDRV_O_RDWR;
2961
fc5d3f84
IM		 2962 /* See if we have a backing HD we can use to create our new image
2963 * on top of. */
2964 if (sync == MIRROR_SYNC_MODE_TOP) {
760e0063 2965 source = backing_bs(bs);
fc5d3f84
IM		 2966 if (!source) {
2967 sync = MIRROR_SYNC_MODE_FULL;
2968 }
2969 }
2970 if (sync == MIRROR_SYNC_MODE_NONE) {
2971 source = bs;
2972 }
2973
99a9addf
SH		 2974 size = bdrv_getlength(bs);
2975 if (size < 0) {
2976 error_setg_errno(errp, -size, "bdrv_getlength failed");
761731b1 2977 goto out;
99a9addf
SH		 2978 }
2979
2980 if (mode != NEW_IMAGE_MODE_EXISTING) {
e6641719 2981 assert(format);
fc5d3f84
IM		 2982 if (source) {
2983 bdrv_img_create(target, format, source->filename,
2984 source->drv->format_name, NULL,
2985 size, flags, &local_err, false);
2986 } else {
2987 bdrv_img_create(target, format, NULL, NULL, NULL,
2988 size, flags, &local_err, false);
2989 }
99a9addf
SH		 2990 }
2991
84d18f06 2992 if (local_err) {
99a9addf 2993 error_propagate(errp, local_err);
761731b1 2994 goto out;
99a9addf
SH		 2995 }
2996
e6641719
HR		 2997 if (format) {
2998 options = qdict_new();
2999 qdict_put(options, "driver", qstring_from_str(format));
3000 }
3001
f67503e5 3002 target_bs = NULL;
6ebf9aa2 3003 ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
99a9addf 3004 if (ret < 0) {
34b5d2c6 3005 error_propagate(errp, local_err);
761731b1 3006 goto out;
99a9addf
SH		 3007 }
3008
761731b1
SH		 3009 bdrv_set_aio_context(target_bs, aio_context);
3010
d58d8453
JS		 3011 if (has_bitmap) {
3012 bmap = bdrv_find_dirty_bitmap(bs, bitmap);
3013 if (!bmap) {
3014 error_setg(errp, "Bitmap '%s' could not be found", bitmap);
3015 goto out;
3016 }
3017 }
3018
3019 backup_start(bs, target_bs, speed, sync, bmap,
3020 on_source_error, on_target_error,
99a9addf
SH		 3021 block_job_cb, bs, &local_err);
3022 if (local_err != NULL) {
4f6fd349 3023 bdrv_unref(target_bs);
99a9addf 3024 error_propagate(errp, local_err);
761731b1 3025 goto out;
99a9addf 3026 }
761731b1
SH		 3027
3028out:
3029 aio_context_release(aio_context);
99a9addf
SH		 3030}
3031
c13163fb
BC		 3032BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3033{
d5a8ee60 3034 return bdrv_named_nodes_list(errp);
c13163fb
BC		 3035}
3036
c29c1dd3
FZ		 3037void qmp_blockdev_backup(const char *device, const char *target,
3038 enum MirrorSyncMode sync,
3039 bool has_speed, int64_t speed,
3040 bool has_on_source_error,
3041 BlockdevOnError on_source_error,
3042 bool has_on_target_error,
3043 BlockdevOnError on_target_error,
3044 Error **errp)
3045{
5433c24f 3046 BlockBackend *blk, *target_blk;
c29c1dd3
FZ		 3047 BlockDriverState *bs;
3048 BlockDriverState *target_bs;
3049 Error *local_err = NULL;
3050 AioContext *aio_context;
3051
3052 if (!has_speed) {
3053 speed = 0;
3054 }
3055 if (!has_on_source_error) {
3056 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3057 }
3058 if (!has_on_target_error) {
3059 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3060 }
3061
a0e8544c
FZ		 3062 blk = blk_by_name(device);
3063 if (!blk) {
5b347c54 3064 error_setg(errp, "Device '%s' not found", device);
c29c1dd3
FZ		 3065 return;
3066 }
3067
5433c24f 3068 aio_context = blk_get_aio_context(blk);
c29c1dd3
FZ		 3069 aio_context_acquire(aio_context);
3070
5433c24f
HR		 3071 if (!blk_is_available(blk)) {
3072 error_setg(errp, "Device '%s' has no medium", device);
3073 goto out;
3074 }
3075 bs = blk_bs(blk);
3076
3077 target_blk = blk_by_name(target);
3078 if (!target_blk) {
5b347c54 3079 error_setg(errp, "Device '%s' not found", target);
c29c1dd3
FZ		 3080 goto out;
3081 }
5433c24f
HR		 3082
3083 if (!blk_is_available(target_blk)) {
3084 error_setg(errp, "Device '%s' has no medium", target);
3085 goto out;
3086 }
3087 target_bs = blk_bs(target_blk);
c29c1dd3
FZ		 3088
3089 bdrv_ref(target_bs);
3090 bdrv_set_aio_context(target_bs, aio_context);
d58d8453
JS		 3091 backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
3092 on_target_error, block_job_cb, bs, &local_err);
c29c1dd3
FZ		 3093 if (local_err != NULL) {
3094 bdrv_unref(target_bs);
3095 error_propagate(errp, local_err);
3096 }
3097out:
3098 aio_context_release(aio_context);
3099}
3100
d9b902db
PB		 3101void qmp_drive_mirror(const char *device, const char *target,
3102 bool has_format, const char *format,
4c828dc6 3103 bool has_node_name, const char *node_name,
09158f00 3104 bool has_replaces, const char *replaces,
d9b902db
PB		 3105 enum MirrorSyncMode sync,
3106 bool has_mode, enum NewImageMode mode,
b952b558 3107 bool has_speed, int64_t speed,
eee13dfe 3108 bool has_granularity, uint32_t granularity,
08e4ed6c 3109 bool has_buf_size, int64_t buf_size,
b952b558
PB		 3110 bool has_on_source_error, BlockdevOnError on_source_error,
3111 bool has_on_target_error, BlockdevOnError on_target_error,
0fc9f8ea 3112 bool has_unmap, bool unmap,
b952b558 3113 Error **errp)
d9b902db 3114{
a0e8544c 3115 BlockBackend *blk;
d9b902db
PB		 3116 BlockDriverState *bs;
3117 BlockDriverState *source, *target_bs;
5a7e7a0b 3118 AioContext *aio_context;
d9b902db 3119 Error *local_err = NULL;
e6641719 3120 QDict *options;
d9b902db 3121 int flags;
ac3c5d83 3122 int64_t size;
d9b902db
PB		 3123 int ret;
3124
3125 if (!has_speed) {
3126 speed = 0;
3127 }
b952b558
PB		 3128 if (!has_on_source_error) {
3129 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3130 }
3131 if (!has_on_target_error) {
3132 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3133 }
d9b902db
PB		 3134 if (!has_mode) {
3135 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3136 }
eee13dfe
PB		 3137 if (!has_granularity) {
3138 granularity = 0;
3139 }
08e4ed6c 3140 if (!has_buf_size) {
48ac0a4d 3141 buf_size = 0;
08e4ed6c 3142 }
0fc9f8ea
FZ		 3143 if (!has_unmap) {
3144 unmap = true;
3145 }
08e4ed6c 3146
eee13dfe 3147 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
c6bd8c70
MA		 3148 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3149 "a value in range [512B, 64MB]");
eee13dfe
PB		 3150 return;
3151 }
3152 if (granularity & (granularity - 1)) {
c6bd8c70
MA		 3153 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3154 "power of 2");
eee13dfe
PB		 3155 return;
3156 }
d9b902db 3157
a0e8544c
FZ		 3158 blk = blk_by_name(device);
3159 if (!blk) {
75158ebb
MA		 3160 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3161 "Device '%s' not found", device);
d9b902db
PB		 3162 return;
3163 }
3164
5433c24f 3165 aio_context = blk_get_aio_context(blk);
5a7e7a0b
SH		 3166 aio_context_acquire(aio_context);
3167
5433c24f 3168 if (!blk_is_available(blk)) {
c6bd8c70 3169 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
5a7e7a0b 3170 goto out;
d9b902db 3171 }
5433c24f 3172 bs = blk_bs(blk);
d9b902db
PB		 3173
3174 if (!has_format) {
3175 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
3176 }
d9b902db 3177
3718d8ab 3178 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) {
5a7e7a0b 3179 goto out;
d9b902db
PB		 3180 }
3181
3182 flags = bs->open_flags | BDRV_O_RDWR;
760e0063 3183 source = backing_bs(bs);
d9b902db
PB		 3184 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
3185 sync = MIRROR_SYNC_MODE_FULL;
3186 }
117e0c82
HR		 3187 if (sync == MIRROR_SYNC_MODE_NONE) {
3188 source = bs;
3189 }
d9b902db 3190
ac3c5d83
SH		 3191 size = bdrv_getlength(bs);
3192 if (size < 0) {
3193 error_setg_errno(errp, -size, "bdrv_getlength failed");
5a7e7a0b 3194 goto out;
ac3c5d83
SH		 3195 }
3196
09158f00
BC		 3197 if (has_replaces) {
3198 BlockDriverState *to_replace_bs;
5a7e7a0b
SH		 3199 AioContext *replace_aio_context;
3200 int64_t replace_size;
09158f00
BC		 3201
3202 if (!has_node_name) {
3203 error_setg(errp, "a node-name must be provided when replacing a"
3204 " named node of the graph");
5a7e7a0b 3205 goto out;
09158f00
BC		 3206 }
3207
e12f3784 3208 to_replace_bs = check_to_replace_node(bs, replaces, &local_err);
09158f00
BC		 3209
3210 if (!to_replace_bs) {
3211 error_propagate(errp, local_err);
5a7e7a0b 3212 goto out;
09158f00
BC		 3213 }
3214
5a7e7a0b
SH		 3215 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3216 aio_context_acquire(replace_aio_context);
3217 replace_size = bdrv_getlength(to_replace_bs);
3218 aio_context_release(replace_aio_context);
3219
3220 if (size != replace_size) {
09158f00
BC		 3221 error_setg(errp, "cannot replace image with a mirror image of "
3222 "different size");
5a7e7a0b 3223 goto out;
09158f00
BC		 3224 }
3225 }
3226
14526864
HR		 3227 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
3228 && mode != NEW_IMAGE_MODE_EXISTING)
3229 {
d9b902db 3230 /* create new image w/o backing file */
e6641719 3231 assert(format);
cf8f2426 3232 bdrv_img_create(target, format,
f382d43a 3233 NULL, NULL, NULL, size, flags, &local_err, false);
d9b902db
PB		 3234 } else {
3235 switch (mode) {
3236 case NEW_IMAGE_MODE_EXISTING:
d9b902db
PB		 3237 break;
3238 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3239 /* create new image with backing file */
cf8f2426
LC		 3240 bdrv_img_create(target, format,
3241 source->filename,
3242 source->drv->format_name,
f382d43a 3243 NULL, size, flags, &local_err, false);
d9b902db
PB		 3244 break;
3245 default:
3246 abort();
3247 }
3248 }
3249
84d18f06 3250 if (local_err) {
cf8f2426 3251 error_propagate(errp, local_err);
5a7e7a0b 3252 goto out;
d9b902db
PB		 3253 }
3254
e6641719 3255 options = qdict_new();
4c828dc6 3256 if (has_node_name) {
4c828dc6
BC		 3257 qdict_put(options, "node-name", qstring_from_str(node_name));
3258 }
e6641719
HR		 3259 if (format) {
3260 qdict_put(options, "driver", qstring_from_str(format));
3261 }
4c828dc6 3262
b812f671
PB		 3263 /* Mirroring takes care of copy-on-write using the source's backing
3264 * file.
3265 */
f67503e5 3266 target_bs = NULL;
4c828dc6 3267 ret = bdrv_open(&target_bs, target, NULL, options,
6ebf9aa2 3268 flags | BDRV_O_NO_BACKING, &local_err);
d9b902db 3269 if (ret < 0) {
34b5d2c6 3270 error_propagate(errp, local_err);
5a7e7a0b 3271 goto out;
d9b902db
PB		 3272 }
3273
5a7e7a0b
SH		 3274 bdrv_set_aio_context(target_bs, aio_context);
3275
09158f00
BC		 3276 /* pass the node name to replace to mirror start since it's loose coupling
3277 * and will allow to check whether the node still exist at mirror completion
3278 */
3279 mirror_start(bs, target_bs,
3280 has_replaces ? replaces : NULL,
3281 speed, granularity, buf_size, sync,
eee13dfe 3282 on_source_error, on_target_error,
0fc9f8ea 3283 unmap,
b952b558 3284 block_job_cb, bs, &local_err);
d9b902db 3285 if (local_err != NULL) {
4f6fd349 3286 bdrv_unref(target_bs);
d9b902db 3287 error_propagate(errp, local_err);
5a7e7a0b 3288 goto out;
d9b902db 3289 }
5a7e7a0b
SH		 3290
3291out:
3292 aio_context_release(aio_context);
d9b902db
PB		 3293}
3294
3d948cdf 3295/* Get the block job for a given device name and acquire its AioContext */
24d6bffe
MA		 3296static BlockJob *find_block_job(const char *device, AioContext **aio_context,
3297 Error **errp)
2d47c6e9 3298{
a0e8544c 3299 BlockBackend *blk;
2d47c6e9
SH		 3300 BlockDriverState *bs;
3301
5433c24f
HR		 3302 *aio_context = NULL;
3303
a0e8544c
FZ		 3304 blk = blk_by_name(device);
3305 if (!blk) {
3d948cdf
SH		 3306 goto notfound;
3307 }
3308
5433c24f 3309 *aio_context = blk_get_aio_context(blk);
3d948cdf
SH		 3310 aio_context_acquire(*aio_context);
3311
5433c24f
HR		 3312 if (!blk_is_available(blk)) {
3313 goto notfound;
3314 }
3315 bs = blk_bs(blk);
3316
3d948cdf 3317 if (!bs->job) {
3d948cdf 3318 goto notfound;
2d47c6e9 3319 }
3d948cdf 3320
2d47c6e9 3321 return bs->job;
3d948cdf
SH		 3322
3323notfound:
2e3a0266
MA		 3324 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
3325 "No active block job on device '%s'", device);
5433c24f
HR		 3326 if (*aio_context) {
3327 aio_context_release(*aio_context);
3328 *aio_context = NULL;
3329 }
3d948cdf 3330 return NULL;
2d47c6e9
SH		 3331}
3332
882ec7ce 3333void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
2d47c6e9 3334{
3d948cdf 3335 AioContext *aio_context;
24d6bffe 3336 BlockJob *job = find_block_job(device, &aio_context, errp);
2d47c6e9
SH		 3337
3338 if (!job) {
2d47c6e9
SH		 3339 return;
3340 }
3341
882ec7ce 3342 block_job_set_speed(job, speed, errp);
3d948cdf 3343 aio_context_release(aio_context);
2d47c6e9 3344}
370521a1 3345
6e37fb81
PB		 3346void qmp_block_job_cancel(const char *device,
3347 bool has_force, bool force, Error **errp)
370521a1 3348{
3d948cdf 3349 AioContext *aio_context;
24d6bffe 3350 BlockJob *job = find_block_job(device, &aio_context, errp);
6e37fb81 3351
370521a1 3352 if (!job) {
370521a1
SH		 3353 return;
3354 }
3d948cdf
SH		 3355
3356 if (!has_force) {
3357 force = false;
3358 }
3359
751ebd76 3360 if (job->user_paused && !force) {
f231b88d
CR		 3361 error_setg(errp, "The block job for device '%s' is currently paused",
3362 device);
3d948cdf 3363 goto out;
8acc72a4 3364 }
370521a1
SH		 3365
3366 trace_qmp_block_job_cancel(job);
3367 block_job_cancel(job);
3d948cdf
SH		 3368out:
3369 aio_context_release(aio_context);
370521a1 3370}
fb5458cd 3371
6e37fb81
PB		 3372void qmp_block_job_pause(const char *device, Error **errp)
3373{
3d948cdf 3374 AioContext *aio_context;
24d6bffe 3375 BlockJob *job = find_block_job(device, &aio_context, errp);
6e37fb81 3376
751ebd76 3377 if (!job || job->user_paused) {
6e37fb81
PB		 3378 return;
3379 }
3380
751ebd76 3381 job->user_paused = true;
6e37fb81
PB		 3382 trace_qmp_block_job_pause(job);
3383 block_job_pause(job);
3d948cdf 3384 aio_context_release(aio_context);
6e37fb81
PB		 3385}
3386
3387void qmp_block_job_resume(const char *device, Error **errp)
3388{
3d948cdf 3389 AioContext *aio_context;
24d6bffe 3390 BlockJob *job = find_block_job(device, &aio_context, errp);
6e37fb81 3391
751ebd76 3392 if (!job || !job->user_paused) {
6e37fb81
PB		 3393 return;
3394 }
3395
751ebd76 3396 job->user_paused = false;
6e37fb81
PB		 3397 trace_qmp_block_job_resume(job);
3398 block_job_resume(job);
3d948cdf 3399 aio_context_release(aio_context);
6e37fb81
PB		 3400}
3401
aeae883b
PB		 3402void qmp_block_job_complete(const char *device, Error **errp)
3403{
3d948cdf 3404 AioContext *aio_context;
24d6bffe 3405 BlockJob *job = find_block_job(device, &aio_context, errp);
aeae883b
PB		 3406
3407 if (!job) {
aeae883b
PB		 3408 return;
3409 }
3410
3411 trace_qmp_block_job_complete(job);
3412 block_job_complete(job, errp);
3d948cdf 3413 aio_context_release(aio_context);
aeae883b
PB		 3414}
3415
fa40e656
JC		 3416void qmp_change_backing_file(const char *device,
3417 const char *image_node_name,
3418 const char *backing_file,
3419 Error **errp)
3420{
a0e8544c 3421 BlockBackend *blk;
fa40e656 3422 BlockDriverState *bs = NULL;
729962f6 3423 AioContext *aio_context;
fa40e656
JC		 3424 BlockDriverState *image_bs = NULL;
3425 Error *local_err = NULL;
3426 bool ro;
3427 int open_flags;
3428 int ret;
3429
a0e8544c
FZ		 3430 blk = blk_by_name(device);
3431 if (!blk) {
75158ebb
MA		 3432 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3433 "Device '%s' not found", device);
fa40e656
JC		 3434 return;
3435 }
3436
5433c24f 3437 aio_context = blk_get_aio_context(blk);
729962f6
SH		 3438 aio_context_acquire(aio_context);
3439
5433c24f
HR		 3440 if (!blk_is_available(blk)) {
3441 error_setg(errp, "Device '%s' has no medium", device);
3442 goto out;
3443 }
3444 bs = blk_bs(blk);
3445
fa40e656
JC		 3446 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
3447 if (local_err) {
3448 error_propagate(errp, local_err);
729962f6 3449 goto out;
fa40e656
JC		 3450 }
3451
3452 if (!image_bs) {
3453 error_setg(errp, "image file not found");
729962f6 3454 goto out;
fa40e656
JC		 3455 }
3456
3457 if (bdrv_find_base(image_bs) == image_bs) {
3458 error_setg(errp, "not allowing backing file change on an image "
3459 "without a backing file");
729962f6 3460 goto out;
fa40e656
JC		 3461 }
3462
3463 /* even though we are not necessarily operating on bs, we need it to
3464 * determine if block ops are currently prohibited on the chain */
3465 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
729962f6 3466 goto out;
fa40e656
JC		 3467 }
3468
3469 /* final sanity check */
3470 if (!bdrv_chain_contains(bs, image_bs)) {
3471 error_setg(errp, "'%s' and image file are not in the same chain",
3472 device);
729962f6 3473 goto out;
fa40e656
JC		 3474 }
3475
3476 /* if not r/w, reopen to make r/w */
3477 open_flags = image_bs->open_flags;
3478 ro = bdrv_is_read_only(image_bs);
3479
3480 if (ro) {
3481 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
3482 if (local_err) {
3483 error_propagate(errp, local_err);
729962f6 3484 goto out;
fa40e656
JC		 3485 }
3486 }
3487
3488 ret = bdrv_change_backing_file(image_bs, backing_file,
3489 image_bs->drv ? image_bs->drv->format_name : "");
3490
3491 if (ret < 0) {
3492 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
3493 backing_file);
3494 /* don't exit here, so we can try to restore open flags if
3495 * appropriate */
3496 }
3497
3498 if (ro) {
3499 bdrv_reopen(image_bs, open_flags, &local_err);
3500 if (local_err) {
3501 error_propagate(errp, local_err); /* will preserve prior errp */
3502 }
3503 }
729962f6
SH		 3504
3505out:
3506 aio_context_release(aio_context);
fa40e656
JC		 3507}
3508
d26c9a15
KW		 3509void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
3510{
3511 QmpOutputVisitor *ov = qmp_output_visitor_new();
be4b67bc
HR		 3512 BlockDriverState *bs;
3513 BlockBackend *blk = NULL;
d26c9a15
KW		 3514 QObject *obj;
3515 QDict *qdict;
d26c9a15
KW		 3516 Error *local_err = NULL;
3517
60e19e06 3518 /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
d26c9a15 3519 * cache.direct=false instead of silently switching to aio=threads, except
60e19e06 3520 * when called from drive_new().
d26c9a15
KW		 3521 *
3522 * For now, simply forbidding the combination for all drivers will do. */
3523 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
c6e0bd9b
KW		 3524 bool direct = options->has_cache &&
3525 options->cache->has_direct &&
3526 options->cache->direct;
3527 if (!direct) {
d26c9a15
KW		 3528 error_setg(errp, "aio=native requires cache.direct=true");
3529 goto fail;
3530 }
3531 }
3532
3533 visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
3534 &options, NULL, &local_err);
84d18f06 3535 if (local_err) {
d26c9a15
KW		 3536 error_propagate(errp, local_err);
3537 goto fail;
3538 }
3539
3540 obj = qmp_output_get_qobject(ov);
3541 qdict = qobject_to_qdict(obj);
3542
3543 qdict_flatten(qdict);
3544
be4b67bc
HR		 3545 if (options->has_id) {
3546 blk = blockdev_init(NULL, qdict, &local_err);
3547 if (local_err) {
3548 error_propagate(errp, local_err);
3549 goto fail;
3550 }
3551
3552 bs = blk_bs(blk);
3553 } else {
be4b67bc
HR		 3554 if (!qdict_get_try_str(qdict, "node-name")) {
3555 error_setg(errp, "'id' and/or 'node-name' need to be specified for "
3556 "the root node");
3557 goto fail;
3558 }
3559
bd745e23
HR		 3560 bs = bds_tree_init(qdict, errp);
3561 if (!bs) {
be4b67bc
HR		 3562 goto fail;
3563 }
d26c9a15
KW		 3564 }
3565
be4b67bc
HR		 3566 if (bs && bdrv_key_required(bs)) {
3567 if (blk) {
3568 blk_unref(blk);
3569 } else {
3570 bdrv_unref(bs);
3571 }
8ae8e904
KW		 3572 error_setg(errp, "blockdev-add doesn't support encrypted devices");
3573 goto fail;
3574 }
3575
d26c9a15
KW		 3576fail:
3577 qmp_output_visitor_cleanup(ov);
3578}
3579
81b936ae
AG		 3580void qmp_x_blockdev_del(bool has_id, const char *id,
3581 bool has_node_name, const char *node_name, Error **errp)
3582{
3583 AioContext *aio_context;
3584 BlockBackend *blk;
3585 BlockDriverState *bs;
3586
3587 if (has_id && has_node_name) {
3588 error_setg(errp, "Only one of id and node-name must be specified");
3589 return;
3590 } else if (!has_id && !has_node_name) {
3591 error_setg(errp, "No block device specified");
3592 return;
3593 }
3594
3595 if (has_id) {
3596 blk = blk_by_name(id);
3597 if (!blk) {
3598 error_setg(errp, "Cannot find block backend %s", id);
3599 return;
3600 }
3601 if (blk_get_refcnt(blk) > 1) {
3602 error_setg(errp, "Block backend %s is in use", id);
3603 return;
3604 }
3605 bs = blk_bs(blk);
3606 aio_context = blk_get_aio_context(blk);
3607 } else {
3608 bs = bdrv_find_node(node_name);
3609 if (!bs) {
3610 error_setg(errp, "Cannot find node %s", node_name);
3611 return;
3612 }
3613 blk = bs->blk;
3614 if (blk) {
3615 error_setg(errp, "Node %s is in use by %s",
3616 node_name, blk_name(blk));
3617 return;
3618 }
3619 aio_context = bdrv_get_aio_context(bs);
3620 }
3621
3622 aio_context_acquire(aio_context);
3623
3624 if (bs) {
3625 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
3626 goto out;
3627 }
3628
3629 if (bs->refcnt > 1 || !QLIST_EMPTY(&bs->parents)) {
3630 error_setg(errp, "Block device %s is in use",
3631 bdrv_get_device_or_node_name(bs));
3632 goto out;
3633 }
3634 }
3635
3636 if (blk) {
3637 blk_unref(blk);
3638 } else {
3639 bdrv_unref(bs);
3640 }
3641
3642out:
3643 aio_context_release(aio_context);
3644}
3645
fea68bb6 3646BlockJobInfoList *qmp_query_block_jobs(Error **errp)
fb5458cd 3647{
fea68bb6
MA		 3648 BlockJobInfoList *head = NULL, **p_next = &head;
3649 BlockDriverState *bs;
fb5458cd 3650
fea68bb6 3651 for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
69691e72
SH		 3652 AioContext *aio_context = bdrv_get_aio_context(bs);
3653
3654 aio_context_acquire(aio_context);
3655
fea68bb6
MA		 3656 if (bs->job) {
3657 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
3658 elem->value = block_job_query(bs->job);
3659 *p_next = elem;
3660 p_next = &elem->next;
3661 }
69691e72
SH		 3662
3663 aio_context_release(aio_context);
fb5458cd 3664 }
fb5458cd 3665
fea68bb6 3666 return head;
fb5458cd 3667}
4d454574 3668
0006383e 3669QemuOptsList qemu_common_drive_opts = {
4d454574 3670 .name = "drive",
0006383e 3671 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
4d454574
PB		 3672 .desc = {
3673 {
4d454574
PB		 3674 .name = "snapshot",
3675 .type = QEMU_OPT_BOOL,
3676 .help = "enable/disable snapshot mode",
a9384aff
PB		 3677 },{
3678 .name = "discard",
3679 .type = QEMU_OPT_STRING,
3680 .help = "discard operation (ignore/off, unmap/on)",
4d454574 3681 },{
54861b92 3682 .name = BDRV_OPT_CACHE_WB,
29c4e2b5
KW		 3683 .type = QEMU_OPT_BOOL,
3684 .help = "enables writeback mode for any caches",
3685 },{
54861b92 3686 .name = BDRV_OPT_CACHE_DIRECT,
29c4e2b5
KW		 3687 .type = QEMU_OPT_BOOL,
3688 .help = "enables use of O_DIRECT (bypass the host page cache)",
3689 },{
54861b92 3690 .name = BDRV_OPT_CACHE_NO_FLUSH,
29c4e2b5
KW		 3691 .type = QEMU_OPT_BOOL,
3692 .help = "ignore any flush requests for the device",
4d454574
PB		 3693 },{
3694 .name = "aio",
3695 .type = QEMU_OPT_STRING,
3696 .help = "host AIO implementation (threads, native)",
3697 },{
3698 .name = "format",
3699 .type = QEMU_OPT_STRING,
3700 .help = "disk format (raw, qcow2, ...)",
4d454574
PB		 3701 },{
3702 .name = "rerror",
3703 .type = QEMU_OPT_STRING,
3704 .help = "read error action",
3705 },{
3706 .name = "werror",
3707 .type = QEMU_OPT_STRING,
3708 .help = "write error action",
4d454574 3709 },{
0f227a94 3710 .name = "read-only",
4d454574
PB		 3711 .type = QEMU_OPT_BOOL,
3712 .help = "open drive file as read-only",
3713 },{
57975222 3714 .name = "throttling.iops-total",
4d454574
PB		 3715 .type = QEMU_OPT_NUMBER,
3716 .help = "limit total I/O operations per second",
3717 },{
57975222 3718 .name = "throttling.iops-read",
4d454574
PB		 3719 .type = QEMU_OPT_NUMBER,
3720 .help = "limit read operations per second",
3721 },{
57975222 3722 .name = "throttling.iops-write",
4d454574
PB		 3723 .type = QEMU_OPT_NUMBER,
3724 .help = "limit write operations per second",
3725 },{
57975222 3726 .name = "throttling.bps-total",
4d454574
PB		 3727 .type = QEMU_OPT_NUMBER,
3728 .help = "limit total bytes per second",
3729 },{
57975222 3730 .name = "throttling.bps-read",
4d454574
PB		 3731 .type = QEMU_OPT_NUMBER,
3732 .help = "limit read bytes per second",
3733 },{
57975222 3734 .name = "throttling.bps-write",
4d454574
PB		 3735 .type = QEMU_OPT_NUMBER,
3736 .help = "limit write bytes per second",
3e9fab69
BC		 3737 },{
3738 .name = "throttling.iops-total-max",
3739 .type = QEMU_OPT_NUMBER,
3740 .help = "I/O operations burst",
3741 },{
3742 .name = "throttling.iops-read-max",
3743 .type = QEMU_OPT_NUMBER,
3744 .help = "I/O operations read burst",
3745 },{
3746 .name = "throttling.iops-write-max",
3747 .type = QEMU_OPT_NUMBER,
3748 .help = "I/O operations write burst",
3749 },{
3750 .name = "throttling.bps-total-max",
3751 .type = QEMU_OPT_NUMBER,
3752 .help = "total bytes burst",
3753 },{
3754 .name = "throttling.bps-read-max",
3755 .type = QEMU_OPT_NUMBER,
3756 .help = "total bytes read burst",
3757 },{
3758 .name = "throttling.bps-write-max",
3759 .type = QEMU_OPT_NUMBER,
3760 .help = "total bytes write burst",
2024c1df
BC		 3761 },{
3762 .name = "throttling.iops-size",
3763 .type = QEMU_OPT_NUMBER,
3764 .help = "when limiting by iops max size of an I/O in bytes",
76f4afb4
AG		 3765 },{
3766 .name = "throttling.group",
3767 .type = QEMU_OPT_STRING,
3768 .help = "name of the block throttling group",
4d454574
PB		 3769 },{
3770 .name = "copy-on-read",
3771 .type = QEMU_OPT_BOOL,
3772 .help = "copy read data from backing file into image file",
465bee1d
PL		 3773 },{
3774 .name = "detect-zeroes",
3775 .type = QEMU_OPT_STRING,
3776 .help = "try to optimize zero writes (off, on, unmap)",
4d454574
PB		 3777 },
3778 { /* end of list */ }
3779 },
3780};
0006383e 3781
bd745e23
HR		 3782static QemuOptsList qemu_root_bds_opts = {
3783 .name = "root-bds",
3784 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
3785 .desc = {
3786 {
3787 .name = "discard",
3788 .type = QEMU_OPT_STRING,
3789 .help = "discard operation (ignore/off, unmap/on)",
3790 },{
3791 .name = "cache.writeback",
3792 .type = QEMU_OPT_BOOL,
3793 .help = "enables writeback mode for any caches",
3794 },{
3795 .name = "cache.direct",
3796 .type = QEMU_OPT_BOOL,
3797 .help = "enables use of O_DIRECT (bypass the host page cache)",
3798 },{
3799 .name = "cache.no-flush",
3800 .type = QEMU_OPT_BOOL,
3801 .help = "ignore any flush requests for the device",
3802 },{
3803 .name = "aio",
3804 .type = QEMU_OPT_STRING,
3805 .help = "host AIO implementation (threads, native)",
3806 },{
3807 .name = "read-only",
3808 .type = QEMU_OPT_BOOL,
3809 .help = "open drive file as read-only",
3810 },{
3811 .name = "copy-on-read",
3812 .type = QEMU_OPT_BOOL,
3813 .help = "copy read data from backing file into image file",
3814 },{
3815 .name = "detect-zeroes",
3816 .type = QEMU_OPT_STRING,
3817 .help = "try to optimize zero writes (off, on, unmap)",
3818 },
3819 { /* end of list */ }
3820 },
3821};
3822
0006383e
KW		 3823QemuOptsList qemu_drive_opts = {
3824 .name = "drive",
3825 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
3826 .desc = {
492fdc6f
KW		 3827 /*
3828 * no elements => accept any params
3829 * validation will happen later
3830 */
0006383e
KW		 3831 { /* end of list */ }
3832 },
3833};
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