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tests: Add virtio-net qtest
[qemu.git] / blockdev.c
blob36ceece9ff8d148adabd24868e0e72c8fa9ec0e1
1 /*
2 * QEMU host block devices
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * later. See the COPYING file in the top-level directory.
8 *
9 * This file incorporates work covered by the following copyright and
10 * permission notice:
11 *
12 * Copyright (c) 2003-2008 Fabrice Bellard
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 * THE SOFTWARE.
31 */
32
33 #include "sysemu/blockdev.h"
34 #include "hw/block/block.h"
35 #include "block/blockjob.h"
36 #include "monitor/monitor.h"
37 #include "qapi/qmp/qerror.h"
38 #include "qemu/option.h"
39 #include "qemu/config-file.h"
40 #include "qapi/qmp/types.h"
41 #include "qapi-visit.h"
42 #include "qapi/qmp-output-visitor.h"
43 #include "sysemu/sysemu.h"
44 #include "block/block_int.h"
45 #include "qmp-commands.h"
46 #include "trace.h"
47 #include "sysemu/arch_init.h"
48
49 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
50
51 static const char *const if_name[IF_COUNT] = {
52 [IF_NONE] = "none",
53 [IF_IDE] = "ide",
54 [IF_SCSI] = "scsi",
55 [IF_FLOPPY] = "floppy",
56 [IF_PFLASH] = "pflash",
57 [IF_MTD] = "mtd",
58 [IF_SD] = "sd",
59 [IF_VIRTIO] = "virtio",
60 [IF_XEN] = "xen",
61 };
62
63 static const int if_max_devs[IF_COUNT] = {
64 /*
65 * Do not change these numbers! They govern how drive option
66 * index maps to unit and bus. That mapping is ABI.
67 *
68 * All controllers used to imlement if=T drives need to support
69 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
70 * Otherwise, some index values map to "impossible" bus, unit
71 * values.
72 *
73 * For instance, if you change [IF_SCSI] to 255, -drive
74 * if=scsi,index=12 no longer means bus=1,unit=5, but
75 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
76 * the drive can't be set up. Regression.
77 */
78 [IF_IDE] = 2,
79 [IF_SCSI] = 7,
80 };
81
82 /*
83 * We automatically delete the drive when a device using it gets
84 * unplugged. Questionable feature, but we can't just drop it.
85 * Device models call blockdev_mark_auto_del() to schedule the
86 * automatic deletion, and generic qdev code calls blockdev_auto_del()
87 * when deletion is actually safe.
88 */
89 void blockdev_mark_auto_del(BlockDriverState *bs)
90 {
91 DriveInfo *dinfo = drive_get_by_blockdev(bs);
92
93 if (dinfo && !dinfo->enable_auto_del) {
94 return;
95 }
96
97 if (bs->job) {
98 block_job_cancel(bs->job);
99 }
100 if (dinfo) {
101 dinfo->auto_del = 1;
102 }
103 }
104
105 void blockdev_auto_del(BlockDriverState *bs)
106 {
107 DriveInfo *dinfo = drive_get_by_blockdev(bs);
108
109 if (dinfo && dinfo->auto_del) {
110 drive_put_ref(dinfo);
111 }
112 }
113
114 static int drive_index_to_bus_id(BlockInterfaceType type, int index)
115 {
116 int max_devs = if_max_devs[type];
117 return max_devs ? index / max_devs : 0;
118 }
119
120 static int drive_index_to_unit_id(BlockInterfaceType type, int index)
121 {
122 int max_devs = if_max_devs[type];
123 return max_devs ? index % max_devs : index;
124 }
125
126 QemuOpts *drive_def(const char *optstr)
127 {
128 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
129 }
130
131 QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
132 const char *optstr)
133 {
134 QemuOpts *opts;
135 char buf[32];
136
137 opts = drive_def(optstr);
138 if (!opts) {
139 return NULL;
140 }
141 if (type != IF_DEFAULT) {
142 qemu_opt_set(opts, "if", if_name[type]);
143 }
144 if (index >= 0) {
145 snprintf(buf, sizeof(buf), "%d", index);
146 qemu_opt_set(opts, "index", buf);
147 }
148 if (file)
149 qemu_opt_set(opts, "file", file);
150 return opts;
151 }
152
153 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
154 {
155 DriveInfo *dinfo;
156
157 /* seek interface, bus and unit */
158
159 QTAILQ_FOREACH(dinfo, &drives, next) {
160 if (dinfo->type == type &&
161 dinfo->bus == bus &&
162 dinfo->unit == unit)
163 return dinfo;
164 }
165
166 return NULL;
167 }
168
169 DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
170 {
171 return drive_get(type,
172 drive_index_to_bus_id(type, index),
173 drive_index_to_unit_id(type, index));
174 }
175
176 int drive_get_max_bus(BlockInterfaceType type)
177 {
178 int max_bus;
179 DriveInfo *dinfo;
180
181 max_bus = -1;
182 QTAILQ_FOREACH(dinfo, &drives, next) {
183 if(dinfo->type == type &&
184 dinfo->bus > max_bus)
185 max_bus = dinfo->bus;
186 }
187 return max_bus;
188 }
189
190 /* Get a block device. This should only be used for single-drive devices
191 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
192 appropriate bus. */
193 DriveInfo *drive_get_next(BlockInterfaceType type)
194 {
195 static int next_block_unit[IF_COUNT];
196
197 return drive_get(type, 0, next_block_unit[type]++);
198 }
199
200 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
201 {
202 DriveInfo *dinfo;
203
204 QTAILQ_FOREACH(dinfo, &drives, next) {
205 if (dinfo->bdrv == bs) {
206 return dinfo;
207 }
208 }
209 return NULL;
210 }
211
212 static void bdrv_format_print(void *opaque, const char *name)
213 {
214 error_printf(" %s", name);
215 }
216
217 static void drive_uninit(DriveInfo *dinfo)
218 {
219 if (dinfo->opts) {
220 qemu_opts_del(dinfo->opts);
221 }
222
223 bdrv_unref(dinfo->bdrv);
224 g_free(dinfo->id);
225 QTAILQ_REMOVE(&drives, dinfo, next);
226 g_free(dinfo->serial);
227 g_free(dinfo);
228 }
229
230 void drive_put_ref(DriveInfo *dinfo)
231 {
232 assert(dinfo->refcount);
233 if (--dinfo->refcount == 0) {
234 drive_uninit(dinfo);
235 }
236 }
237
238 void drive_get_ref(DriveInfo *dinfo)
239 {
240 dinfo->refcount++;
241 }
242
243 typedef struct {
244 QEMUBH *bh;
245 BlockDriverState *bs;
246 } BDRVPutRefBH;
247
248 static void bdrv_put_ref_bh(void *opaque)
249 {
250 BDRVPutRefBH *s = opaque;
251
252 bdrv_unref(s->bs);
253 qemu_bh_delete(s->bh);
254 g_free(s);
255 }
256
257 /*
258 * Release a BDS reference in a BH
259 *
260 * It is not safe to use bdrv_unref() from a callback function when the callers
261 * still need the BlockDriverState. In such cases we schedule a BH to release
262 * the reference.
263 */
264 static void bdrv_put_ref_bh_schedule(BlockDriverState *bs)
265 {
266 BDRVPutRefBH *s;
267
268 s = g_new(BDRVPutRefBH, 1);
269 s->bh = qemu_bh_new(bdrv_put_ref_bh, s);
270 s->bs = bs;
271 qemu_bh_schedule(s->bh);
272 }
273
274 static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
275 {
276 if (!strcmp(buf, "ignore")) {
277 return BLOCKDEV_ON_ERROR_IGNORE;
278 } else if (!is_read && !strcmp(buf, "enospc")) {
279 return BLOCKDEV_ON_ERROR_ENOSPC;
280 } else if (!strcmp(buf, "stop")) {
281 return BLOCKDEV_ON_ERROR_STOP;
282 } else if (!strcmp(buf, "report")) {
283 return BLOCKDEV_ON_ERROR_REPORT;
284 } else {
285 error_setg(errp, "'%s' invalid %s error action",
286 buf, is_read ? "read" : "write");
287 return -1;
288 }
289 }
290
291 static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
292 {
293 if (throttle_conflicting(cfg)) {
294 error_setg(errp, "bps/iops/max total values and read/write values"
295 " cannot be used at the same time");
296 return false;
297 }
298
299 if (!throttle_is_valid(cfg)) {
300 error_setg(errp, "bps/iops/maxs values must be 0 or greater");
301 return false;
302 }
303
304 return true;
305 }
306
307 typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
308
309 /* Takes the ownership of bs_opts */
310 static DriveInfo *blockdev_init(const char *file, QDict *bs_opts,
311 BlockInterfaceType type,
312 Error **errp)
313 {
314 const char *buf;
315 const char *serial;
316 int ro = 0;
317 int bdrv_flags = 0;
318 int on_read_error, on_write_error;
319 DriveInfo *dinfo;
320 ThrottleConfig cfg;
321 int snapshot = 0;
322 bool copy_on_read;
323 int ret;
324 Error *error = NULL;
325 QemuOpts *opts;
326 const char *id;
327 bool has_driver_specific_opts;
328 BlockDriver *drv = NULL;
329
330 /* Check common options by copying from bs_opts to opts, all other options
331 * stay in bs_opts for processing by bdrv_open(). */
332 id = qdict_get_try_str(bs_opts, "id");
333 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
334 if (error_is_set(&error)) {
335 error_propagate(errp, error);
336 return NULL;
337 }
338
339 qemu_opts_absorb_qdict(opts, bs_opts, &error);
340 if (error_is_set(&error)) {
341 error_propagate(errp, error);
342 goto early_err;
343 }
344
345 if (id) {
346 qdict_del(bs_opts, "id");
347 }
348
349 has_driver_specific_opts = !!qdict_size(bs_opts);
350
351 /* extract parameters */
352 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
353 ro = qemu_opt_get_bool(opts, "read-only", 0);
354 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
355
356 serial = qemu_opt_get(opts, "serial");
357
358 if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
359 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
360 error_setg(errp, "invalid discard option");
361 goto early_err;
362 }
363 }
364
365 if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
366 bdrv_flags |= BDRV_O_CACHE_WB;
367 }
368 if (qemu_opt_get_bool(opts, "cache.direct", false)) {
369 bdrv_flags |= BDRV_O_NOCACHE;
370 }
371 if (qemu_opt_get_bool(opts, "cache.no-flush", false)) {
372 bdrv_flags |= BDRV_O_NO_FLUSH;
373 }
374
375 #ifdef CONFIG_LINUX_AIO
376 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
377 if (!strcmp(buf, "native")) {
378 bdrv_flags |= BDRV_O_NATIVE_AIO;
379 } else if (!strcmp(buf, "threads")) {
380 /* this is the default */
381 } else {
382 error_setg(errp, "invalid aio option");
383 goto early_err;
384 }
385 }
386 #endif
387
388 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
389 if (is_help_option(buf)) {
390 error_printf("Supported formats:");
391 bdrv_iterate_format(bdrv_format_print, NULL);
392 error_printf("\n");
393 goto early_err;
394 }
395
396 drv = bdrv_find_format(buf);
397 if (!drv) {
398 error_setg(errp, "'%s' invalid format", buf);
399 goto early_err;
400 }
401 }
402
403 /* disk I/O throttling */
404 memset(&cfg, 0, sizeof(cfg));
405 cfg.buckets[THROTTLE_BPS_TOTAL].avg =
406 qemu_opt_get_number(opts, "throttling.bps-total", 0);
407 cfg.buckets[THROTTLE_BPS_READ].avg =
408 qemu_opt_get_number(opts, "throttling.bps-read", 0);
409 cfg.buckets[THROTTLE_BPS_WRITE].avg =
410 qemu_opt_get_number(opts, "throttling.bps-write", 0);
411 cfg.buckets[THROTTLE_OPS_TOTAL].avg =
412 qemu_opt_get_number(opts, "throttling.iops-total", 0);
413 cfg.buckets[THROTTLE_OPS_READ].avg =
414 qemu_opt_get_number(opts, "throttling.iops-read", 0);
415 cfg.buckets[THROTTLE_OPS_WRITE].avg =
416 qemu_opt_get_number(opts, "throttling.iops-write", 0);
417
418 cfg.buckets[THROTTLE_BPS_TOTAL].max =
419 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
420 cfg.buckets[THROTTLE_BPS_READ].max =
421 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
422 cfg.buckets[THROTTLE_BPS_WRITE].max =
423 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
424 cfg.buckets[THROTTLE_OPS_TOTAL].max =
425 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
426 cfg.buckets[THROTTLE_OPS_READ].max =
427 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
428 cfg.buckets[THROTTLE_OPS_WRITE].max =
429 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
430
431 cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0);
432
433 if (!check_throttle_config(&cfg, &error)) {
434 error_propagate(errp, error);
435 goto early_err;
436 }
437
438 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
439 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
440 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
441 error_setg(errp, "werror is not supported by this bus type");
442 goto early_err;
443 }
444
445 on_write_error = parse_block_error_action(buf, 0, &error);
446 if (error_is_set(&error)) {
447 error_propagate(errp, error);
448 goto early_err;
449 }
450 }
451
452 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
453 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
454 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
455 error_report("rerror is not supported by this bus type");
456 goto early_err;
457 }
458
459 on_read_error = parse_block_error_action(buf, 1, &error);
460 if (error_is_set(&error)) {
461 error_propagate(errp, error);
462 goto early_err;
463 }
464 }
465
466 /* init */
467 dinfo = g_malloc0(sizeof(*dinfo));
468 dinfo->id = g_strdup(qemu_opts_id(opts));
469 dinfo->bdrv = bdrv_new(dinfo->id);
470 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
471 dinfo->bdrv->read_only = ro;
472 dinfo->type = type;
473 dinfo->refcount = 1;
474 if (serial != NULL) {
475 dinfo->serial = g_strdup(serial);
476 }
477 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
478
479 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
480
481 /* disk I/O throttling */
482 if (throttle_enabled(&cfg)) {
483 bdrv_io_limits_enable(dinfo->bdrv);
484 bdrv_set_io_limits(dinfo->bdrv, &cfg);
485 }
486
487 if (!file || !*file) {
488 if (has_driver_specific_opts) {
489 file = NULL;
490 } else {
491 QDECREF(bs_opts);
492 qemu_opts_del(opts);
493 return dinfo;
494 }
495 }
496 if (snapshot) {
497 /* always use cache=unsafe with snapshot */
498 bdrv_flags &= ~BDRV_O_CACHE_MASK;
499 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
500 }
501
502 if (copy_on_read) {
503 bdrv_flags |= BDRV_O_COPY_ON_READ;
504 }
505
506 if (runstate_check(RUN_STATE_INMIGRATE)) {
507 bdrv_flags |= BDRV_O_INCOMING;
508 }
509
510 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
511
512 QINCREF(bs_opts);
513 ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv, &error);
514
515 if (ret < 0) {
516 error_setg(errp, "could not open disk image %s: %s",
517 file ?: dinfo->id, error_get_pretty(error));
518 error_free(error);
519 goto err;
520 }
521
522 if (bdrv_key_required(dinfo->bdrv))
523 autostart = 0;
524
525 QDECREF(bs_opts);
526 qemu_opts_del(opts);
527
528 return dinfo;
529
530 err:
531 bdrv_unref(dinfo->bdrv);
532 g_free(dinfo->id);
533 QTAILQ_REMOVE(&drives, dinfo, next);
534 g_free(dinfo);
535 early_err:
536 QDECREF(bs_opts);
537 qemu_opts_del(opts);
538 return NULL;
539 }
540
541 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
542 {
543 const char *value;
544
545 value = qemu_opt_get(opts, from);
546 if (value) {
547 qemu_opt_set(opts, to, value);
548 qemu_opt_unset(opts, from);
549 }
550 }
551
552 QemuOptsList qemu_legacy_drive_opts = {
553 .name = "drive",
554 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
555 .desc = {
556 {
557 .name = "bus",
558 .type = QEMU_OPT_NUMBER,
559 .help = "bus number",
560 },{
561 .name = "unit",
562 .type = QEMU_OPT_NUMBER,
563 .help = "unit number (i.e. lun for scsi)",
564 },{
565 .name = "index",
566 .type = QEMU_OPT_NUMBER,
567 .help = "index number",
568 },{
569 .name = "media",
570 .type = QEMU_OPT_STRING,
571 .help = "media type (disk, cdrom)",
572 },{
573 .name = "if",
574 .type = QEMU_OPT_STRING,
575 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
576 },{
577 .name = "cyls",
578 .type = QEMU_OPT_NUMBER,
579 .help = "number of cylinders (ide disk geometry)",
580 },{
581 .name = "heads",
582 .type = QEMU_OPT_NUMBER,
583 .help = "number of heads (ide disk geometry)",
584 },{
585 .name = "secs",
586 .type = QEMU_OPT_NUMBER,
587 .help = "number of sectors (ide disk geometry)",
588 },{
589 .name = "trans",
590 .type = QEMU_OPT_STRING,
591 .help = "chs translation (auto, lba, none)",
592 },{
593 .name = "boot",
594 .type = QEMU_OPT_BOOL,
595 .help = "(deprecated, ignored)",
596 },{
597 .name = "addr",
598 .type = QEMU_OPT_STRING,
599 .help = "pci address (virtio only)",
600 },{
601 .name = "file",
602 .type = QEMU_OPT_STRING,
603 .help = "file name",
604 },
605
606 /* Options that are passed on, but have special semantics with -drive */
607 {
608 .name = "read-only",
609 .type = QEMU_OPT_BOOL,
610 .help = "open drive file as read-only",
611 },{
612 .name = "copy-on-read",
613 .type = QEMU_OPT_BOOL,
614 .help = "copy read data from backing file into image file",
615 },
616
617 { /* end of list */ }
618 },
619 };
620
621 DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
622 {
623 const char *value;
624 DriveInfo *dinfo = NULL;
625 QDict *bs_opts;
626 QemuOpts *legacy_opts;
627 DriveMediaType media = MEDIA_DISK;
628 BlockInterfaceType type;
629 int cyls, heads, secs, translation;
630 int max_devs, bus_id, unit_id, index;
631 const char *devaddr;
632 bool read_only = false;
633 bool copy_on_read;
634 const char *filename;
635 Error *local_err = NULL;
636
637 /* Change legacy command line options into QMP ones */
638 qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
639 qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
640 qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");
641
642 qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
643 qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
644 qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
645
646 qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max");
647 qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max");
648 qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max");
649
650 qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max");
651 qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max");
652 qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max");
653
654 qemu_opt_rename(all_opts,
655 "iops_size", "throttling.iops-size");
656
657 qemu_opt_rename(all_opts, "readonly", "read-only");
658
659 value = qemu_opt_get(all_opts, "cache");
660 if (value) {
661 int flags = 0;
662
663 if (bdrv_parse_cache_flags(value, &flags) != 0) {
664 error_report("invalid cache option");
665 return NULL;
666 }
667
668 /* Specific options take precedence */
669 if (!qemu_opt_get(all_opts, "cache.writeback")) {
670 qemu_opt_set_bool(all_opts, "cache.writeback",
671 !!(flags & BDRV_O_CACHE_WB));
672 }
673 if (!qemu_opt_get(all_opts, "cache.direct")) {
674 qemu_opt_set_bool(all_opts, "cache.direct",
675 !!(flags & BDRV_O_NOCACHE));
676 }
677 if (!qemu_opt_get(all_opts, "cache.no-flush")) {
678 qemu_opt_set_bool(all_opts, "cache.no-flush",
679 !!(flags & BDRV_O_NO_FLUSH));
680 }
681 qemu_opt_unset(all_opts, "cache");
682 }
683
684 /* Get a QDict for processing the options */
685 bs_opts = qdict_new();
686 qemu_opts_to_qdict(all_opts, bs_opts);
687
688 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
689 &error_abort);
690 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
691 if (error_is_set(&local_err)) {
692 qerror_report_err(local_err);
693 error_free(local_err);
694 goto fail;
695 }
696
697 /* Deprecated option boot=[on|off] */
698 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
699 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
700 "ignored. Future versions will reject this parameter. Please "
701 "update your scripts.\n");
702 }
703
704 /* Media type */
705 value = qemu_opt_get(legacy_opts, "media");
706 if (value) {
707 if (!strcmp(value, "disk")) {
708 media = MEDIA_DISK;
709 } else if (!strcmp(value, "cdrom")) {
710 media = MEDIA_CDROM;
711 read_only = true;
712 } else {
713 error_report("'%s' invalid media", value);
714 goto fail;
715 }
716 }
717
718 /* copy-on-read is disabled with a warning for read-only devices */
719 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
720 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
721
722 if (read_only && copy_on_read) {
723 error_report("warning: disabling copy-on-read on read-only drive");
724 copy_on_read = false;
725 }
726
727 qdict_put(bs_opts, "read-only",
728 qstring_from_str(read_only ? "on" : "off"));
729 qdict_put(bs_opts, "copy-on-read",
730 qstring_from_str(copy_on_read ? "on" :"off"));
731
732 /* Controller type */
733 value = qemu_opt_get(legacy_opts, "if");
734 if (value) {
735 for (type = 0;
736 type < IF_COUNT && strcmp(value, if_name[type]);
737 type++) {
738 }
739 if (type == IF_COUNT) {
740 error_report("unsupported bus type '%s'", value);
741 goto fail;
742 }
743 } else {
744 type = block_default_type;
745 }
746
747 /* Geometry */
748 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
749 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
750 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
751
752 if (cyls || heads || secs) {
753 if (cyls < 1) {
754 error_report("invalid physical cyls number");
755 goto fail;
756 }
757 if (heads < 1) {
758 error_report("invalid physical heads number");
759 goto fail;
760 }
761 if (secs < 1) {
762 error_report("invalid physical secs number");
763 goto fail;
764 }
765 }
766
767 translation = BIOS_ATA_TRANSLATION_AUTO;
768 value = qemu_opt_get(legacy_opts, "trans");
769 if (value != NULL) {
770 if (!cyls) {
771 error_report("'%s' trans must be used with cyls, heads and secs",
772 value);
773 goto fail;
774 }
775 if (!strcmp(value, "none")) {
776 translation = BIOS_ATA_TRANSLATION_NONE;
777 } else if (!strcmp(value, "lba")) {
778 translation = BIOS_ATA_TRANSLATION_LBA;
779 } else if (!strcmp(value, "auto")) {
780 translation = BIOS_ATA_TRANSLATION_AUTO;
781 } else {
782 error_report("'%s' invalid translation type", value);
783 goto fail;
784 }
785 }
786
787 if (media == MEDIA_CDROM) {
788 if (cyls || secs || heads) {
789 error_report("CHS can't be set with media=cdrom");
790 goto fail;
791 }
792 }
793
794 /* Device address specified by bus/unit or index.
795 * If none was specified, try to find the first free one. */
796 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
797 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
798 index = qemu_opt_get_number(legacy_opts, "index", -1);
799
800 max_devs = if_max_devs[type];
801
802 if (index != -1) {
803 if (bus_id != 0 || unit_id != -1) {
804 error_report("index cannot be used with bus and unit");
805 goto fail;
806 }
807 bus_id = drive_index_to_bus_id(type, index);
808 unit_id = drive_index_to_unit_id(type, index);
809 }
810
811 if (unit_id == -1) {
812 unit_id = 0;
813 while (drive_get(type, bus_id, unit_id) != NULL) {
814 unit_id++;
815 if (max_devs && unit_id >= max_devs) {
816 unit_id -= max_devs;
817 bus_id++;
818 }
819 }
820 }
821
822 if (max_devs && unit_id >= max_devs) {
823 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
824 goto fail;
825 }
826
827 if (drive_get(type, bus_id, unit_id) != NULL) {
828 error_report("drive with bus=%d, unit=%d (index=%d) exists",
829 bus_id, unit_id, index);
830 goto fail;
831 }
832
833 /* no id supplied -> create one */
834 if (qemu_opts_id(all_opts) == NULL) {
835 char *new_id;
836 const char *mediastr = "";
837 if (type == IF_IDE || type == IF_SCSI) {
838 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
839 }
840 if (max_devs) {
841 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
842 mediastr, unit_id);
843 } else {
844 new_id = g_strdup_printf("%s%s%i", if_name[type],
845 mediastr, unit_id);
846 }
847 qdict_put(bs_opts, "id", qstring_from_str(new_id));
848 g_free(new_id);
849 }
850
851 /* Add virtio block device */
852 devaddr = qemu_opt_get(legacy_opts, "addr");
853 if (devaddr && type != IF_VIRTIO) {
854 error_report("addr is not supported by this bus type");
855 goto fail;
856 }
857
858 if (type == IF_VIRTIO) {
859 QemuOpts *devopts;
860 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
861 &error_abort);
862 if (arch_type == QEMU_ARCH_S390X) {
863 qemu_opt_set(devopts, "driver", "virtio-blk-s390");
864 } else {
865 qemu_opt_set(devopts, "driver", "virtio-blk-pci");
866 }
867 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"));
868 if (devaddr) {
869 qemu_opt_set(devopts, "addr", devaddr);
870 }
871 }
872
873 filename = qemu_opt_get(legacy_opts, "file");
874
875 /* Actual block device init: Functionality shared with blockdev-add */
876 dinfo = blockdev_init(filename, bs_opts, type, &local_err);
877 if (dinfo == NULL) {
878 if (error_is_set(&local_err)) {
879 qerror_report_err(local_err);
880 error_free(local_err);
881 }
882 goto fail;
883 } else {
884 assert(!error_is_set(&local_err));
885 }
886
887 /* Set legacy DriveInfo fields */
888 dinfo->enable_auto_del = true;
889 dinfo->opts = all_opts;
890
891 dinfo->cyls = cyls;
892 dinfo->heads = heads;
893 dinfo->secs = secs;
894 dinfo->trans = translation;
895
896 dinfo->bus = bus_id;
897 dinfo->unit = unit_id;
898 dinfo->devaddr = devaddr;
899
900 switch(type) {
901 case IF_IDE:
902 case IF_SCSI:
903 case IF_XEN:
904 case IF_NONE:
905 dinfo->media_cd = media == MEDIA_CDROM;
906 break;
907 default:
908 break;
909 }
910
911 fail:
912 qemu_opts_del(legacy_opts);
913 return dinfo;
914 }
915
916 void do_commit(Monitor *mon, const QDict *qdict)
917 {
918 const char *device = qdict_get_str(qdict, "device");
919 BlockDriverState *bs;
920 int ret;
921
922 if (!strcmp(device, "all")) {
923 ret = bdrv_commit_all();
924 } else {
925 bs = bdrv_find(device);
926 if (!bs) {
927 monitor_printf(mon, "Device '%s' not found\n", device);
928 return;
929 }
930 ret = bdrv_commit(bs);
931 }
932 if (ret < 0) {
933 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
934 strerror(-ret));
935 }
936 }
937
938 static void blockdev_do_action(int kind, void *data, Error **errp)
939 {
940 TransactionAction action;
941 TransactionActionList list;
942
943 action.kind = kind;
944 action.data = data;
945 list.value = &action;
946 list.next = NULL;
947 qmp_transaction(&list, errp);
948 }
949
950 void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
951 bool has_node_name, const char *node_name,
952 const char *snapshot_file,
953 bool has_snapshot_node_name,
954 const char *snapshot_node_name,
955 bool has_format, const char *format,
956 bool has_mode, NewImageMode mode, Error **errp)
957 {
958 BlockdevSnapshot snapshot = {
959 .has_device = has_device,
960 .device = (char *) device,
961 .has_node_name = has_node_name,
962 .node_name = (char *) node_name,
963 .snapshot_file = (char *) snapshot_file,
964 .has_snapshot_node_name = has_snapshot_node_name,
965 .snapshot_node_name = (char *) snapshot_node_name,
966 .has_format = has_format,
967 .format = (char *) format,
968 .has_mode = has_mode,
969 .mode = mode,
970 };
971 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
972 &snapshot, errp);
973 }
974
975 void qmp_blockdev_snapshot_internal_sync(const char *device,
976 const char *name,
977 Error **errp)
978 {
979 BlockdevSnapshotInternal snapshot = {
980 .device = (char *) device,
981 .name = (char *) name
982 };
983
984 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
985 &snapshot, errp);
986 }
987
988 SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
989 bool has_id,
990 const char *id,
991 bool has_name,
992 const char *name,
993 Error **errp)
994 {
995 BlockDriverState *bs = bdrv_find(device);
996 QEMUSnapshotInfo sn;
997 Error *local_err = NULL;
998 SnapshotInfo *info = NULL;
999 int ret;
1000
1001 if (!bs) {
1002 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1003 return NULL;
1004 }
1005
1006 if (!has_id) {
1007 id = NULL;
1008 }
1009
1010 if (!has_name) {
1011 name = NULL;
1012 }
1013
1014 if (!id && !name) {
1015 error_setg(errp, "Name or id must be provided");
1016 return NULL;
1017 }
1018
1019 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
1020 if (error_is_set(&local_err)) {
1021 error_propagate(errp, local_err);
1022 return NULL;
1023 }
1024 if (!ret) {
1025 error_setg(errp,
1026 "Snapshot with id '%s' and name '%s' does not exist on "
1027 "device '%s'",
1028 STR_OR_NULL(id), STR_OR_NULL(name), device);
1029 return NULL;
1030 }
1031
1032 bdrv_snapshot_delete(bs, id, name, &local_err);
1033 if (error_is_set(&local_err)) {
1034 error_propagate(errp, local_err);
1035 return NULL;
1036 }
1037
1038 info = g_malloc0(sizeof(SnapshotInfo));
1039 info->id = g_strdup(sn.id_str);
1040 info->name = g_strdup(sn.name);
1041 info->date_nsec = sn.date_nsec;
1042 info->date_sec = sn.date_sec;
1043 info->vm_state_size = sn.vm_state_size;
1044 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1045 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1046
1047 return info;
1048 }
1049
1050 /* New and old BlockDriverState structs for group snapshots */
1051
1052 typedef struct BlkTransactionState BlkTransactionState;
1053
1054 /* Only prepare() may fail. In a single transaction, only one of commit() or
1055 abort() will be called, clean() will always be called if it present. */
1056 typedef struct BdrvActionOps {
1057 /* Size of state struct, in bytes. */
1058 size_t instance_size;
1059 /* Prepare the work, must NOT be NULL. */
1060 void (*prepare)(BlkTransactionState *common, Error **errp);
1061 /* Commit the changes, can be NULL. */
1062 void (*commit)(BlkTransactionState *common);
1063 /* Abort the changes on fail, can be NULL. */
1064 void (*abort)(BlkTransactionState *common);
1065 /* Clean up resource in the end, can be NULL. */
1066 void (*clean)(BlkTransactionState *common);
1067 } BdrvActionOps;
1068
1069 /*
1070 * This structure must be arranged as first member in child type, assuming
1071 * that compiler will also arrange it to the same address with parent instance.
1072 * Later it will be used in free().
1073 */
1074 struct BlkTransactionState {
1075 TransactionAction *action;
1076 const BdrvActionOps *ops;
1077 QSIMPLEQ_ENTRY(BlkTransactionState) entry;
1078 };
1079
1080 /* internal snapshot private data */
1081 typedef struct InternalSnapshotState {
1082 BlkTransactionState common;
1083 BlockDriverState *bs;
1084 QEMUSnapshotInfo sn;
1085 } InternalSnapshotState;
1086
1087 static void internal_snapshot_prepare(BlkTransactionState *common,
1088 Error **errp)
1089 {
1090 const char *device;
1091 const char *name;
1092 BlockDriverState *bs;
1093 QEMUSnapshotInfo old_sn, *sn;
1094 bool ret;
1095 qemu_timeval tv;
1096 BlockdevSnapshotInternal *internal;
1097 InternalSnapshotState *state;
1098 int ret1;
1099
1100 g_assert(common->action->kind ==
1101 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
1102 internal = common->action->blockdev_snapshot_internal_sync;
1103 state = DO_UPCAST(InternalSnapshotState, common, common);
1104
1105 /* 1. parse input */
1106 device = internal->device;
1107 name = internal->name;
1108
1109 /* 2. check for validation */
1110 bs = bdrv_find(device);
1111 if (!bs) {
1112 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1113 return;
1114 }
1115
1116 if (!bdrv_is_inserted(bs)) {
1117 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1118 return;
1119 }
1120
1121 if (bdrv_is_read_only(bs)) {
1122 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1123 return;
1124 }
1125
1126 if (!bdrv_can_snapshot(bs)) {
1127 error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
1128 bs->drv->format_name, device, "internal snapshot");
1129 return;
1130 }
1131
1132 if (!strlen(name)) {
1133 error_setg(errp, "Name is empty");
1134 return;
1135 }
1136
1137 /* check whether a snapshot with name exist */
1138 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, errp);
1139 if (error_is_set(errp)) {
1140 return;
1141 } else if (ret) {
1142 error_setg(errp,
1143 "Snapshot with name '%s' already exists on device '%s'",
1144 name, device);
1145 return;
1146 }
1147
1148 /* 3. take the snapshot */
1149 sn = &state->sn;
1150 pstrcpy(sn->name, sizeof(sn->name), name);
1151 qemu_gettimeofday(&tv);
1152 sn->date_sec = tv.tv_sec;
1153 sn->date_nsec = tv.tv_usec * 1000;
1154 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1155
1156 ret1 = bdrv_snapshot_create(bs, sn);
1157 if (ret1 < 0) {
1158 error_setg_errno(errp, -ret1,
1159 "Failed to create snapshot '%s' on device '%s'",
1160 name, device);
1161 return;
1162 }
1163
1164 /* 4. succeed, mark a snapshot is created */
1165 state->bs = bs;
1166 }
1167
1168 static void internal_snapshot_abort(BlkTransactionState *common)
1169 {
1170 InternalSnapshotState *state =
1171 DO_UPCAST(InternalSnapshotState, common, common);
1172 BlockDriverState *bs = state->bs;
1173 QEMUSnapshotInfo *sn = &state->sn;
1174 Error *local_error = NULL;
1175
1176 if (!bs) {
1177 return;
1178 }
1179
1180 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
1181 error_report("Failed to delete snapshot with id '%s' and name '%s' on "
1182 "device '%s' in abort: %s",
1183 sn->id_str,
1184 sn->name,
1185 bdrv_get_device_name(bs),
1186 error_get_pretty(local_error));
1187 error_free(local_error);
1188 }
1189 }
1190
1191 /* external snapshot private data */
1192 typedef struct ExternalSnapshotState {
1193 BlkTransactionState common;
1194 BlockDriverState *old_bs;
1195 BlockDriverState *new_bs;
1196 } ExternalSnapshotState;
1197
1198 static void external_snapshot_prepare(BlkTransactionState *common,
1199 Error **errp)
1200 {
1201 BlockDriver *drv;
1202 int flags, ret;
1203 QDict *options = NULL;
1204 Error *local_err = NULL;
1205 bool has_device = false;
1206 const char *device;
1207 bool has_node_name = false;
1208 const char *node_name;
1209 bool has_snapshot_node_name = false;
1210 const char *snapshot_node_name;
1211 const char *new_image_file;
1212 const char *format = "qcow2";
1213 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1214 ExternalSnapshotState *state =
1215 DO_UPCAST(ExternalSnapshotState, common, common);
1216 TransactionAction *action = common->action;
1217
1218 /* get parameters */
1219 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
1220
1221 has_device = action->blockdev_snapshot_sync->has_device;
1222 device = action->blockdev_snapshot_sync->device;
1223 has_node_name = action->blockdev_snapshot_sync->has_node_name;
1224 node_name = action->blockdev_snapshot_sync->node_name;
1225 has_snapshot_node_name =
1226 action->blockdev_snapshot_sync->has_snapshot_node_name;
1227 snapshot_node_name = action->blockdev_snapshot_sync->snapshot_node_name;
1228
1229 new_image_file = action->blockdev_snapshot_sync->snapshot_file;
1230 if (action->blockdev_snapshot_sync->has_format) {
1231 format = action->blockdev_snapshot_sync->format;
1232 }
1233 if (action->blockdev_snapshot_sync->has_mode) {
1234 mode = action->blockdev_snapshot_sync->mode;
1235 }
1236
1237 /* start processing */
1238 drv = bdrv_find_format(format);
1239 if (!drv) {
1240 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1241 return;
1242 }
1243
1244 state->old_bs = bdrv_lookup_bs(has_device ? device : NULL,
1245 has_node_name ? node_name : NULL,
1246 &local_err);
1247 if (error_is_set(&local_err)) {
1248 error_propagate(errp, local_err);
1249 return;
1250 }
1251
1252 if (has_node_name && !has_snapshot_node_name) {
1253 error_setg(errp, "New snapshot node name missing");
1254 return;
1255 }
1256
1257 if (has_snapshot_node_name && bdrv_find_node(snapshot_node_name)) {
1258 error_setg(errp, "New snapshot node name already existing");
1259 return;
1260 }
1261
1262 if (!bdrv_is_inserted(state->old_bs)) {
1263 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1264 return;
1265 }
1266
1267 if (bdrv_in_use(state->old_bs)) {
1268 error_set(errp, QERR_DEVICE_IN_USE, device);
1269 return;
1270 }
1271
1272 if (!bdrv_is_read_only(state->old_bs)) {
1273 if (bdrv_flush(state->old_bs)) {
1274 error_set(errp, QERR_IO_ERROR);
1275 return;
1276 }
1277 }
1278
1279 if (!bdrv_is_first_non_filter(state->old_bs)) {
1280 error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
1281 return;
1282 }
1283
1284 flags = state->old_bs->open_flags;
1285
1286 /* create new image w/backing file */
1287 if (mode != NEW_IMAGE_MODE_EXISTING) {
1288 bdrv_img_create(new_image_file, format,
1289 state->old_bs->filename,
1290 state->old_bs->drv->format_name,
1291 NULL, -1, flags, &local_err, false);
1292 if (error_is_set(&local_err)) {
1293 error_propagate(errp, local_err);
1294 return;
1295 }
1296 }
1297
1298 if (has_snapshot_node_name) {
1299 options = qdict_new();
1300 qdict_put(options, "node-name",
1301 qstring_from_str(snapshot_node_name));
1302 }
1303
1304 /* We will manually add the backing_hd field to the bs later */
1305 state->new_bs = bdrv_new("");
1306 /* TODO Inherit bs->options or only take explicit options with an
1307 * extended QMP command? */
1308 ret = bdrv_open(state->new_bs, new_image_file, options,
1309 flags | BDRV_O_NO_BACKING, drv, &local_err);
1310 if (ret != 0) {
1311 error_propagate(errp, local_err);
1312 }
1313
1314 QDECREF(options);
1315 }
1316
1317 static void external_snapshot_commit(BlkTransactionState *common)
1318 {
1319 ExternalSnapshotState *state =
1320 DO_UPCAST(ExternalSnapshotState, common, common);
1321
1322 /* This removes our old bs and adds the new bs */
1323 bdrv_append(state->new_bs, state->old_bs);
1324 /* We don't need (or want) to use the transactional
1325 * bdrv_reopen_multiple() across all the entries at once, because we
1326 * don't want to abort all of them if one of them fails the reopen */
1327 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
1328 NULL);
1329 }
1330
1331 static void external_snapshot_abort(BlkTransactionState *common)
1332 {
1333 ExternalSnapshotState *state =
1334 DO_UPCAST(ExternalSnapshotState, common, common);
1335 if (state->new_bs) {
1336 bdrv_unref(state->new_bs);
1337 }
1338 }
1339
1340 typedef struct DriveBackupState {
1341 BlkTransactionState common;
1342 BlockDriverState *bs;
1343 BlockJob *job;
1344 } DriveBackupState;
1345
1346 static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
1347 {
1348 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1349 DriveBackup *backup;
1350 Error *local_err = NULL;
1351
1352 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1353 backup = common->action->drive_backup;
1354
1355 qmp_drive_backup(backup->device, backup->target,
1356 backup->has_format, backup->format,
1357 backup->sync,
1358 backup->has_mode, backup->mode,
1359 backup->has_speed, backup->speed,
1360 backup->has_on_source_error, backup->on_source_error,
1361 backup->has_on_target_error, backup->on_target_error,
1362 &local_err);
1363 if (error_is_set(&local_err)) {
1364 error_propagate(errp, local_err);
1365 state->bs = NULL;
1366 state->job = NULL;
1367 return;
1368 }
1369
1370 state->bs = bdrv_find(backup->device);
1371 state->job = state->bs->job;
1372 }
1373
1374 static void drive_backup_abort(BlkTransactionState *common)
1375 {
1376 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1377 BlockDriverState *bs = state->bs;
1378
1379 /* Only cancel if it's the job we started */
1380 if (bs && bs->job && bs->job == state->job) {
1381 block_job_cancel_sync(bs->job);
1382 }
1383 }
1384
1385 static void abort_prepare(BlkTransactionState *common, Error **errp)
1386 {
1387 error_setg(errp, "Transaction aborted using Abort action");
1388 }
1389
1390 static void abort_commit(BlkTransactionState *common)
1391 {
1392 g_assert_not_reached(); /* this action never succeeds */
1393 }
1394
1395 static const BdrvActionOps actions[] = {
1396 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
1397 .instance_size = sizeof(ExternalSnapshotState),
1398 .prepare = external_snapshot_prepare,
1399 .commit = external_snapshot_commit,
1400 .abort = external_snapshot_abort,
1401 },
1402 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1403 .instance_size = sizeof(DriveBackupState),
1404 .prepare = drive_backup_prepare,
1405 .abort = drive_backup_abort,
1406 },
1407 [TRANSACTION_ACTION_KIND_ABORT] = {
1408 .instance_size = sizeof(BlkTransactionState),
1409 .prepare = abort_prepare,
1410 .commit = abort_commit,
1411 },
1412 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
1413 .instance_size = sizeof(InternalSnapshotState),
1414 .prepare = internal_snapshot_prepare,
1415 .abort = internal_snapshot_abort,
1416 },
1417 };
1418
1419 /*
1420 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1421 * then we do not pivot any of the devices in the group, and abandon the
1422 * snapshots
1423 */
1424 void qmp_transaction(TransactionActionList *dev_list, Error **errp)
1425 {
1426 TransactionActionList *dev_entry = dev_list;
1427 BlkTransactionState *state, *next;
1428 Error *local_err = NULL;
1429
1430 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
1431 QSIMPLEQ_INIT(&snap_bdrv_states);
1432
1433 /* drain all i/o before any snapshots */
1434 bdrv_drain_all();
1435
1436 /* We don't do anything in this loop that commits us to the snapshot */
1437 while (NULL != dev_entry) {
1438 TransactionAction *dev_info = NULL;
1439 const BdrvActionOps *ops;
1440
1441 dev_info = dev_entry->value;
1442 dev_entry = dev_entry->next;
1443
1444 assert(dev_info->kind < ARRAY_SIZE(actions));
1445
1446 ops = &actions[dev_info->kind];
1447 assert(ops->instance_size > 0);
1448
1449 state = g_malloc0(ops->instance_size);
1450 state->ops = ops;
1451 state->action = dev_info;
1452 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
1453
1454 state->ops->prepare(state, &local_err);
1455 if (error_is_set(&local_err)) {
1456 error_propagate(errp, local_err);
1457 goto delete_and_fail;
1458 }
1459 }
1460
1461 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1462 if (state->ops->commit) {
1463 state->ops->commit(state);
1464 }
1465 }
1466
1467 /* success */
1468 goto exit;
1469
1470 delete_and_fail:
1471 /*
1472 * failure, and it is all-or-none; abandon each new bs, and keep using
1473 * the original bs for all images
1474 */
1475 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1476 if (state->ops->abort) {
1477 state->ops->abort(state);
1478 }
1479 }
1480 exit:
1481 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
1482 if (state->ops->clean) {
1483 state->ops->clean(state);
1484 }
1485 g_free(state);
1486 }
1487 }
1488
1489
1490 static void eject_device(BlockDriverState *bs, int force, Error **errp)
1491 {
1492 if (bdrv_in_use(bs)) {
1493 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
1494 return;
1495 }
1496 if (!bdrv_dev_has_removable_media(bs)) {
1497 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
1498 return;
1499 }
1500
1501 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
1502 bdrv_dev_eject_request(bs, force);
1503 if (!force) {
1504 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
1505 return;
1506 }
1507 }
1508
1509 bdrv_close(bs);
1510 }
1511
1512 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
1513 {
1514 BlockDriverState *bs;
1515
1516 bs = bdrv_find(device);
1517 if (!bs) {
1518 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1519 return;
1520 }
1521
1522 eject_device(bs, force, errp);
1523 }
1524
1525 void qmp_block_passwd(bool has_device, const char *device,
1526 bool has_node_name, const char *node_name,
1527 const char *password, Error **errp)
1528 {
1529 Error *local_err = NULL;
1530 BlockDriverState *bs;
1531 int err;
1532
1533 bs = bdrv_lookup_bs(has_device ? device : NULL,
1534 has_node_name ? node_name : NULL,
1535 &local_err);
1536 if (error_is_set(&local_err)) {
1537 error_propagate(errp, local_err);
1538 return;
1539 }
1540
1541 err = bdrv_set_key(bs, password);
1542 if (err == -EINVAL) {
1543 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1544 return;
1545 } else if (err < 0) {
1546 error_set(errp, QERR_INVALID_PASSWORD);
1547 return;
1548 }
1549 }
1550
1551 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
1552 int bdrv_flags, BlockDriver *drv,
1553 const char *password, Error **errp)
1554 {
1555 Error *local_err = NULL;
1556 int ret;
1557
1558 ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv, &local_err);
1559 if (ret < 0) {
1560 error_propagate(errp, local_err);
1561 return;
1562 }
1563
1564 if (bdrv_key_required(bs)) {
1565 if (password) {
1566 if (bdrv_set_key(bs, password) < 0) {
1567 error_set(errp, QERR_INVALID_PASSWORD);
1568 }
1569 } else {
1570 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
1571 bdrv_get_encrypted_filename(bs));
1572 }
1573 } else if (password) {
1574 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1575 }
1576 }
1577
1578 void qmp_change_blockdev(const char *device, const char *filename,
1579 const char *format, Error **errp)
1580 {
1581 BlockDriverState *bs;
1582 BlockDriver *drv = NULL;
1583 int bdrv_flags;
1584 Error *err = NULL;
1585
1586 bs = bdrv_find(device);
1587 if (!bs) {
1588 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1589 return;
1590 }
1591
1592 if (format) {
1593 drv = bdrv_find_whitelisted_format(format, bs->read_only);
1594 if (!drv) {
1595 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1596 return;
1597 }
1598 }
1599
1600 eject_device(bs, 0, &err);
1601 if (error_is_set(&err)) {
1602 error_propagate(errp, err);
1603 return;
1604 }
1605
1606 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
1607 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
1608
1609 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
1610 }
1611
1612 /* throttling disk I/O limits */
1613 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
1614 int64_t bps_wr,
1615 int64_t iops,
1616 int64_t iops_rd,
1617 int64_t iops_wr,
1618 bool has_bps_max,
1619 int64_t bps_max,
1620 bool has_bps_rd_max,
1621 int64_t bps_rd_max,
1622 bool has_bps_wr_max,
1623 int64_t bps_wr_max,
1624 bool has_iops_max,
1625 int64_t iops_max,
1626 bool has_iops_rd_max,
1627 int64_t iops_rd_max,
1628 bool has_iops_wr_max,
1629 int64_t iops_wr_max,
1630 bool has_iops_size,
1631 int64_t iops_size, Error **errp)
1632 {
1633 ThrottleConfig cfg;
1634 BlockDriverState *bs;
1635
1636 bs = bdrv_find(device);
1637 if (!bs) {
1638 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1639 return;
1640 }
1641
1642 memset(&cfg, 0, sizeof(cfg));
1643 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
1644 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
1645 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
1646
1647 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
1648 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
1649 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
1650
1651 if (has_bps_max) {
1652 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
1653 }
1654 if (has_bps_rd_max) {
1655 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
1656 }
1657 if (has_bps_wr_max) {
1658 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
1659 }
1660 if (has_iops_max) {
1661 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
1662 }
1663 if (has_iops_rd_max) {
1664 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
1665 }
1666 if (has_iops_wr_max) {
1667 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
1668 }
1669
1670 if (has_iops_size) {
1671 cfg.op_size = iops_size;
1672 }
1673
1674 if (!check_throttle_config(&cfg, errp)) {
1675 return;
1676 }
1677
1678 if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
1679 bdrv_io_limits_enable(bs);
1680 } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) {
1681 bdrv_io_limits_disable(bs);
1682 }
1683
1684 if (bs->io_limits_enabled) {
1685 bdrv_set_io_limits(bs, &cfg);
1686 }
1687 }
1688
1689 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1690 {
1691 const char *id = qdict_get_str(qdict, "id");
1692 BlockDriverState *bs;
1693
1694 bs = bdrv_find(id);
1695 if (!bs) {
1696 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1697 return -1;
1698 }
1699 if (bdrv_in_use(bs)) {
1700 qerror_report(QERR_DEVICE_IN_USE, id);
1701 return -1;
1702 }
1703
1704 /* quiesce block driver; prevent further io */
1705 bdrv_drain_all();
1706 bdrv_flush(bs);
1707 bdrv_close(bs);
1708
1709 /* if we have a device attached to this BlockDriverState
1710 * then we need to make the drive anonymous until the device
1711 * can be removed. If this is a drive with no device backing
1712 * then we can just get rid of the block driver state right here.
1713 */
1714 if (bdrv_get_attached_dev(bs)) {
1715 bdrv_make_anon(bs);
1716
1717 /* Further I/O must not pause the guest */
1718 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
1719 BLOCKDEV_ON_ERROR_REPORT);
1720 } else {
1721 drive_uninit(drive_get_by_blockdev(bs));
1722 }
1723
1724 return 0;
1725 }
1726
1727 void qmp_block_resize(bool has_device, const char *device,
1728 bool has_node_name, const char *node_name,
1729 int64_t size, Error **errp)
1730 {
1731 Error *local_err = NULL;
1732 BlockDriverState *bs;
1733 int ret;
1734
1735 bs = bdrv_lookup_bs(has_device ? device : NULL,
1736 has_node_name ? node_name : NULL,
1737 &local_err);
1738 if (error_is_set(&local_err)) {
1739 error_propagate(errp, local_err);
1740 return;
1741 }
1742
1743 if (!bdrv_is_first_non_filter(bs)) {
1744 error_set(errp, QERR_FEATURE_DISABLED, "resize");
1745 return;
1746 }
1747
1748 if (size < 0) {
1749 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1750 return;
1751 }
1752
1753 /* complete all in-flight operations before resizing the device */
1754 bdrv_drain_all();
1755
1756 ret = bdrv_truncate(bs, size);
1757 switch (ret) {
1758 case 0:
1759 break;
1760 case -ENOMEDIUM:
1761 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1762 break;
1763 case -ENOTSUP:
1764 error_set(errp, QERR_UNSUPPORTED);
1765 break;
1766 case -EACCES:
1767 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1768 break;
1769 case -EBUSY:
1770 error_set(errp, QERR_DEVICE_IN_USE, device);
1771 break;
1772 default:
1773 error_setg_errno(errp, -ret, "Could not resize");
1774 break;
1775 }
1776 }
1777
1778 static void block_job_cb(void *opaque, int ret)
1779 {
1780 BlockDriverState *bs = opaque;
1781 QObject *obj;
1782
1783 trace_block_job_cb(bs, bs->job, ret);
1784
1785 assert(bs->job);
1786 obj = qobject_from_block_job(bs->job);
1787 if (ret < 0) {
1788 QDict *dict = qobject_to_qdict(obj);
1789 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1790 }
1791
1792 if (block_job_is_cancelled(bs->job)) {
1793 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1794 } else {
1795 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1796 }
1797 qobject_decref(obj);
1798
1799 bdrv_put_ref_bh_schedule(bs);
1800 }
1801
1802 void qmp_block_stream(const char *device, bool has_base,
1803 const char *base, bool has_speed, int64_t speed,
1804 bool has_on_error, BlockdevOnError on_error,
1805 Error **errp)
1806 {
1807 BlockDriverState *bs;
1808 BlockDriverState *base_bs = NULL;
1809 Error *local_err = NULL;
1810
1811 if (!has_on_error) {
1812 on_error = BLOCKDEV_ON_ERROR_REPORT;
1813 }
1814
1815 bs = bdrv_find(device);
1816 if (!bs) {
1817 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1818 return;
1819 }
1820
1821 if (base) {
1822 base_bs = bdrv_find_backing_image(bs, base);
1823 if (base_bs == NULL) {
1824 error_set(errp, QERR_BASE_NOT_FOUND, base);
1825 return;
1826 }
1827 }
1828
1829 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1830 on_error, block_job_cb, bs, &local_err);
1831 if (error_is_set(&local_err)) {
1832 error_propagate(errp, local_err);
1833 return;
1834 }
1835
1836 trace_qmp_block_stream(bs, bs->job);
1837 }
1838
1839 void qmp_block_commit(const char *device,
1840 bool has_base, const char *base, const char *top,
1841 bool has_speed, int64_t speed,
1842 Error **errp)
1843 {
1844 BlockDriverState *bs;
1845 BlockDriverState *base_bs, *top_bs;
1846 Error *local_err = NULL;
1847 /* This will be part of the QMP command, if/when the
1848 * BlockdevOnError change for blkmirror makes it in
1849 */
1850 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1851
1852 /* drain all i/o before commits */
1853 bdrv_drain_all();
1854
1855 bs = bdrv_find(device);
1856 if (!bs) {
1857 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1858 return;
1859 }
1860
1861 /* default top_bs is the active layer */
1862 top_bs = bs;
1863
1864 if (top) {
1865 if (strcmp(bs->filename, top) != 0) {
1866 top_bs = bdrv_find_backing_image(bs, top);
1867 }
1868 }
1869
1870 if (top_bs == NULL) {
1871 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
1872 return;
1873 }
1874
1875 if (has_base && base) {
1876 base_bs = bdrv_find_backing_image(top_bs, base);
1877 } else {
1878 base_bs = bdrv_find_base(top_bs);
1879 }
1880
1881 if (base_bs == NULL) {
1882 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
1883 return;
1884 }
1885
1886 if (top_bs == bs) {
1887 commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
1888 bs, &local_err);
1889 } else {
1890 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
1891 &local_err);
1892 }
1893 if (local_err != NULL) {
1894 error_propagate(errp, local_err);
1895 return;
1896 }
1897 }
1898
1899 void qmp_drive_backup(const char *device, const char *target,
1900 bool has_format, const char *format,
1901 enum MirrorSyncMode sync,
1902 bool has_mode, enum NewImageMode mode,
1903 bool has_speed, int64_t speed,
1904 bool has_on_source_error, BlockdevOnError on_source_error,
1905 bool has_on_target_error, BlockdevOnError on_target_error,
1906 Error **errp)
1907 {
1908 BlockDriverState *bs;
1909 BlockDriverState *target_bs;
1910 BlockDriverState *source = NULL;
1911 BlockDriver *drv = NULL;
1912 Error *local_err = NULL;
1913 int flags;
1914 int64_t size;
1915 int ret;
1916
1917 if (!has_speed) {
1918 speed = 0;
1919 }
1920 if (!has_on_source_error) {
1921 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1922 }
1923 if (!has_on_target_error) {
1924 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1925 }
1926 if (!has_mode) {
1927 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1928 }
1929
1930 bs = bdrv_find(device);
1931 if (!bs) {
1932 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1933 return;
1934 }
1935
1936 if (!bdrv_is_inserted(bs)) {
1937 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1938 return;
1939 }
1940
1941 if (!has_format) {
1942 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1943 }
1944 if (format) {
1945 drv = bdrv_find_format(format);
1946 if (!drv) {
1947 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1948 return;
1949 }
1950 }
1951
1952 if (bdrv_in_use(bs)) {
1953 error_set(errp, QERR_DEVICE_IN_USE, device);
1954 return;
1955 }
1956
1957 flags = bs->open_flags | BDRV_O_RDWR;
1958
1959 /* See if we have a backing HD we can use to create our new image
1960 * on top of. */
1961 if (sync == MIRROR_SYNC_MODE_TOP) {
1962 source = bs->backing_hd;
1963 if (!source) {
1964 sync = MIRROR_SYNC_MODE_FULL;
1965 }
1966 }
1967 if (sync == MIRROR_SYNC_MODE_NONE) {
1968 source = bs;
1969 }
1970
1971 size = bdrv_getlength(bs);
1972 if (size < 0) {
1973 error_setg_errno(errp, -size, "bdrv_getlength failed");
1974 return;
1975 }
1976
1977 if (mode != NEW_IMAGE_MODE_EXISTING) {
1978 assert(format && drv);
1979 if (source) {
1980 bdrv_img_create(target, format, source->filename,
1981 source->drv->format_name, NULL,
1982 size, flags, &local_err, false);
1983 } else {
1984 bdrv_img_create(target, format, NULL, NULL, NULL,
1985 size, flags, &local_err, false);
1986 }
1987 }
1988
1989 if (error_is_set(&local_err)) {
1990 error_propagate(errp, local_err);
1991 return;
1992 }
1993
1994 target_bs = bdrv_new("");
1995 ret = bdrv_open(target_bs, target, NULL, flags, drv, &local_err);
1996 if (ret < 0) {
1997 bdrv_unref(target_bs);
1998 error_propagate(errp, local_err);
1999 return;
2000 }
2001
2002 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
2003 block_job_cb, bs, &local_err);
2004 if (local_err != NULL) {
2005 bdrv_unref(target_bs);
2006 error_propagate(errp, local_err);
2007 return;
2008 }
2009 }
2010
2011 BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
2012 {
2013 return bdrv_named_nodes_list();
2014 }
2015
2016 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
2017
2018 void qmp_drive_mirror(const char *device, const char *target,
2019 bool has_format, const char *format,
2020 enum MirrorSyncMode sync,
2021 bool has_mode, enum NewImageMode mode,
2022 bool has_speed, int64_t speed,
2023 bool has_granularity, uint32_t granularity,
2024 bool has_buf_size, int64_t buf_size,
2025 bool has_on_source_error, BlockdevOnError on_source_error,
2026 bool has_on_target_error, BlockdevOnError on_target_error,
2027 Error **errp)
2028 {
2029 BlockDriverState *bs;
2030 BlockDriverState *source, *target_bs;
2031 BlockDriver *drv = NULL;
2032 Error *local_err = NULL;
2033 int flags;
2034 int64_t size;
2035 int ret;
2036
2037 if (!has_speed) {
2038 speed = 0;
2039 }
2040 if (!has_on_source_error) {
2041 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
2042 }
2043 if (!has_on_target_error) {
2044 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
2045 }
2046 if (!has_mode) {
2047 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
2048 }
2049 if (!has_granularity) {
2050 granularity = 0;
2051 }
2052 if (!has_buf_size) {
2053 buf_size = DEFAULT_MIRROR_BUF_SIZE;
2054 }
2055
2056 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
2057 error_set(errp, QERR_INVALID_PARAMETER, device);
2058 return;
2059 }
2060 if (granularity & (granularity - 1)) {
2061 error_set(errp, QERR_INVALID_PARAMETER, device);
2062 return;
2063 }
2064
2065 bs = bdrv_find(device);
2066 if (!bs) {
2067 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
2068 return;
2069 }
2070
2071 if (!bdrv_is_inserted(bs)) {
2072 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
2073 return;
2074 }
2075
2076 if (!has_format) {
2077 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
2078 }
2079 if (format) {
2080 drv = bdrv_find_format(format);
2081 if (!drv) {
2082 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
2083 return;
2084 }
2085 }
2086
2087 if (bdrv_in_use(bs)) {
2088 error_set(errp, QERR_DEVICE_IN_USE, device);
2089 return;
2090 }
2091
2092 flags = bs->open_flags | BDRV_O_RDWR;
2093 source = bs->backing_hd;
2094 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
2095 sync = MIRROR_SYNC_MODE_FULL;
2096 }
2097 if (sync == MIRROR_SYNC_MODE_NONE) {
2098 source = bs;
2099 }
2100
2101 size = bdrv_getlength(bs);
2102 if (size < 0) {
2103 error_setg_errno(errp, -size, "bdrv_getlength failed");
2104 return;
2105 }
2106
2107 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
2108 && mode != NEW_IMAGE_MODE_EXISTING)
2109 {
2110 /* create new image w/o backing file */
2111 assert(format && drv);
2112 bdrv_img_create(target, format,
2113 NULL, NULL, NULL, size, flags, &local_err, false);
2114 } else {
2115 switch (mode) {
2116 case NEW_IMAGE_MODE_EXISTING:
2117 break;
2118 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
2119 /* create new image with backing file */
2120 bdrv_img_create(target, format,
2121 source->filename,
2122 source->drv->format_name,
2123 NULL, size, flags, &local_err, false);
2124 break;
2125 default:
2126 abort();
2127 }
2128 }
2129
2130 if (error_is_set(&local_err)) {
2131 error_propagate(errp, local_err);
2132 return;
2133 }
2134
2135 /* Mirroring takes care of copy-on-write using the source's backing
2136 * file.
2137 */
2138 target_bs = bdrv_new("");
2139 ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv,
2140 &local_err);
2141 if (ret < 0) {
2142 bdrv_unref(target_bs);
2143 error_propagate(errp, local_err);
2144 return;
2145 }
2146
2147 mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
2148 on_source_error, on_target_error,
2149 block_job_cb, bs, &local_err);
2150 if (local_err != NULL) {
2151 bdrv_unref(target_bs);
2152 error_propagate(errp, local_err);
2153 return;
2154 }
2155 }
2156
2157 static BlockJob *find_block_job(const char *device)
2158 {
2159 BlockDriverState *bs;
2160
2161 bs = bdrv_find(device);
2162 if (!bs || !bs->job) {
2163 return NULL;
2164 }
2165 return bs->job;
2166 }
2167
2168 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
2169 {
2170 BlockJob *job = find_block_job(device);
2171
2172 if (!job) {
2173 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2174 return;
2175 }
2176
2177 block_job_set_speed(job, speed, errp);
2178 }
2179
2180 void qmp_block_job_cancel(const char *device,
2181 bool has_force, bool force, Error **errp)
2182 {
2183 BlockJob *job = find_block_job(device);
2184
2185 if (!has_force) {
2186 force = false;
2187 }
2188
2189 if (!job) {
2190 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2191 return;
2192 }
2193 if (job->paused && !force) {
2194 error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
2195 return;
2196 }
2197
2198 trace_qmp_block_job_cancel(job);
2199 block_job_cancel(job);
2200 }
2201
2202 void qmp_block_job_pause(const char *device, Error **errp)
2203 {
2204 BlockJob *job = find_block_job(device);
2205
2206 if (!job) {
2207 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2208 return;
2209 }
2210
2211 trace_qmp_block_job_pause(job);
2212 block_job_pause(job);
2213 }
2214
2215 void qmp_block_job_resume(const char *device, Error **errp)
2216 {
2217 BlockJob *job = find_block_job(device);
2218
2219 if (!job) {
2220 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2221 return;
2222 }
2223
2224 trace_qmp_block_job_resume(job);
2225 block_job_resume(job);
2226 }
2227
2228 void qmp_block_job_complete(const char *device, Error **errp)
2229 {
2230 BlockJob *job = find_block_job(device);
2231
2232 if (!job) {
2233 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2234 return;
2235 }
2236
2237 trace_qmp_block_job_complete(job);
2238 block_job_complete(job, errp);
2239 }
2240
2241 void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
2242 {
2243 QmpOutputVisitor *ov = qmp_output_visitor_new();
2244 QObject *obj;
2245 QDict *qdict;
2246 Error *local_err = NULL;
2247
2248 /* Require an ID in the top level */
2249 if (!options->has_id) {
2250 error_setg(errp, "Block device needs an ID");
2251 goto fail;
2252 }
2253
2254 /* TODO Sort it out in raw-posix and drive_init: Reject aio=native with
2255 * cache.direct=false instead of silently switching to aio=threads, except
2256 * if called from drive_init.
2257 *
2258 * For now, simply forbidding the combination for all drivers will do. */
2259 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
2260 bool direct = options->cache->has_direct && options->cache->direct;
2261 if (!options->has_cache && !direct) {
2262 error_setg(errp, "aio=native requires cache.direct=true");
2263 goto fail;
2264 }
2265 }
2266
2267 visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
2268 &options, NULL, &local_err);
2269 if (error_is_set(&local_err)) {
2270 error_propagate(errp, local_err);
2271 goto fail;
2272 }
2273
2274 obj = qmp_output_get_qobject(ov);
2275 qdict = qobject_to_qdict(obj);
2276
2277 qdict_flatten(qdict);
2278
2279 blockdev_init(NULL, qdict, IF_NONE, &local_err);
2280 if (error_is_set(&local_err)) {
2281 error_propagate(errp, local_err);
2282 goto fail;
2283 }
2284
2285 fail:
2286 qmp_output_visitor_cleanup(ov);
2287 }
2288
2289 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
2290 {
2291 BlockJobInfoList **prev = opaque;
2292 BlockJob *job = bs->job;
2293
2294 if (job) {
2295 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
2296 elem->value = block_job_query(bs->job);
2297 (*prev)->next = elem;
2298 *prev = elem;
2299 }
2300 }
2301
2302 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
2303 {
2304 /* Dummy is a fake list element for holding the head pointer */
2305 BlockJobInfoList dummy = {};
2306 BlockJobInfoList *prev = &dummy;
2307 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
2308 return dummy.next;
2309 }
2310
2311 QemuOptsList qemu_common_drive_opts = {
2312 .name = "drive",
2313 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
2314 .desc = {
2315 {
2316 .name = "snapshot",
2317 .type = QEMU_OPT_BOOL,
2318 .help = "enable/disable snapshot mode",
2319 },{
2320 .name = "discard",
2321 .type = QEMU_OPT_STRING,
2322 .help = "discard operation (ignore/off, unmap/on)",
2323 },{
2324 .name = "cache.writeback",
2325 .type = QEMU_OPT_BOOL,
2326 .help = "enables writeback mode for any caches",
2327 },{
2328 .name = "cache.direct",
2329 .type = QEMU_OPT_BOOL,
2330 .help = "enables use of O_DIRECT (bypass the host page cache)",
2331 },{
2332 .name = "cache.no-flush",
2333 .type = QEMU_OPT_BOOL,
2334 .help = "ignore any flush requests for the device",
2335 },{
2336 .name = "aio",
2337 .type = QEMU_OPT_STRING,
2338 .help = "host AIO implementation (threads, native)",
2339 },{
2340 .name = "format",
2341 .type = QEMU_OPT_STRING,
2342 .help = "disk format (raw, qcow2, ...)",
2343 },{
2344 .name = "serial",
2345 .type = QEMU_OPT_STRING,
2346 .help = "disk serial number",
2347 },{
2348 .name = "rerror",
2349 .type = QEMU_OPT_STRING,
2350 .help = "read error action",
2351 },{
2352 .name = "werror",
2353 .type = QEMU_OPT_STRING,
2354 .help = "write error action",
2355 },{
2356 .name = "read-only",
2357 .type = QEMU_OPT_BOOL,
2358 .help = "open drive file as read-only",
2359 },{
2360 .name = "throttling.iops-total",
2361 .type = QEMU_OPT_NUMBER,
2362 .help = "limit total I/O operations per second",
2363 },{
2364 .name = "throttling.iops-read",
2365 .type = QEMU_OPT_NUMBER,
2366 .help = "limit read operations per second",
2367 },{
2368 .name = "throttling.iops-write",
2369 .type = QEMU_OPT_NUMBER,
2370 .help = "limit write operations per second",
2371 },{
2372 .name = "throttling.bps-total",
2373 .type = QEMU_OPT_NUMBER,
2374 .help = "limit total bytes per second",
2375 },{
2376 .name = "throttling.bps-read",
2377 .type = QEMU_OPT_NUMBER,
2378 .help = "limit read bytes per second",
2379 },{
2380 .name = "throttling.bps-write",
2381 .type = QEMU_OPT_NUMBER,
2382 .help = "limit write bytes per second",
2383 },{
2384 .name = "throttling.iops-total-max",
2385 .type = QEMU_OPT_NUMBER,
2386 .help = "I/O operations burst",
2387 },{
2388 .name = "throttling.iops-read-max",
2389 .type = QEMU_OPT_NUMBER,
2390 .help = "I/O operations read burst",
2391 },{
2392 .name = "throttling.iops-write-max",
2393 .type = QEMU_OPT_NUMBER,
2394 .help = "I/O operations write burst",
2395 },{
2396 .name = "throttling.bps-total-max",
2397 .type = QEMU_OPT_NUMBER,
2398 .help = "total bytes burst",
2399 },{
2400 .name = "throttling.bps-read-max",
2401 .type = QEMU_OPT_NUMBER,
2402 .help = "total bytes read burst",
2403 },{
2404 .name = "throttling.bps-write-max",
2405 .type = QEMU_OPT_NUMBER,
2406 .help = "total bytes write burst",
2407 },{
2408 .name = "throttling.iops-size",
2409 .type = QEMU_OPT_NUMBER,
2410 .help = "when limiting by iops max size of an I/O in bytes",
2411 },{
2412 .name = "copy-on-read",
2413 .type = QEMU_OPT_BOOL,
2414 .help = "copy read data from backing file into image file",
2415 },
2416 { /* end of list */ }
2417 },
2418 };
2419
2420 QemuOptsList qemu_drive_opts = {
2421 .name = "drive",
2422 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
2423 .desc = {
2424 /*
2425 * no elements => accept any params
2426 * validation will happen later
2427 */
2428 { /* end of list */ }
2429 },
2430 };
QEmu