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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 Error **errp)
312 {
313 const char *buf;
314 const char *serial;
315 int ro = 0;
316 int bdrv_flags = 0;
317 int on_read_error, on_write_error;
318 DriveInfo *dinfo;
319 ThrottleConfig cfg;
320 int snapshot = 0;
321 bool copy_on_read;
322 int ret;
323 Error *error = NULL;
324 QemuOpts *opts;
325 const char *id;
326 bool has_driver_specific_opts;
327 BlockDriver *drv = NULL;
328
329 /* Check common options by copying from bs_opts to opts, all other options
330 * stay in bs_opts for processing by bdrv_open(). */
331 id = qdict_get_try_str(bs_opts, "id");
332 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
333 if (error) {
334 error_propagate(errp, error);
335 return NULL;
336 }
337
338 qemu_opts_absorb_qdict(opts, bs_opts, &error);
339 if (error) {
340 error_propagate(errp, error);
341 goto early_err;
342 }
343
344 if (id) {
345 qdict_del(bs_opts, "id");
346 }
347
348 has_driver_specific_opts = !!qdict_size(bs_opts);
349
350 /* extract parameters */
351 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
352 ro = qemu_opt_get_bool(opts, "read-only", 0);
353 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
354
355 serial = qemu_opt_get(opts, "serial");
356
357 if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
358 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
359 error_setg(errp, "invalid discard option");
360 goto early_err;
361 }
362 }
363
364 if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
365 bdrv_flags |= BDRV_O_CACHE_WB;
366 }
367 if (qemu_opt_get_bool(opts, "cache.direct", false)) {
368 bdrv_flags |= BDRV_O_NOCACHE;
369 }
370 if (qemu_opt_get_bool(opts, "cache.no-flush", false)) {
371 bdrv_flags |= BDRV_O_NO_FLUSH;
372 }
373
374 #ifdef CONFIG_LINUX_AIO
375 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
376 if (!strcmp(buf, "native")) {
377 bdrv_flags |= BDRV_O_NATIVE_AIO;
378 } else if (!strcmp(buf, "threads")) {
379 /* this is the default */
380 } else {
381 error_setg(errp, "invalid aio option");
382 goto early_err;
383 }
384 }
385 #endif
386
387 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
388 if (is_help_option(buf)) {
389 error_printf("Supported formats:");
390 bdrv_iterate_format(bdrv_format_print, NULL);
391 error_printf("\n");
392 goto early_err;
393 }
394
395 drv = bdrv_find_format(buf);
396 if (!drv) {
397 error_setg(errp, "'%s' invalid format", buf);
398 goto early_err;
399 }
400 }
401
402 /* disk I/O throttling */
403 memset(&cfg, 0, sizeof(cfg));
404 cfg.buckets[THROTTLE_BPS_TOTAL].avg =
405 qemu_opt_get_number(opts, "throttling.bps-total", 0);
406 cfg.buckets[THROTTLE_BPS_READ].avg =
407 qemu_opt_get_number(opts, "throttling.bps-read", 0);
408 cfg.buckets[THROTTLE_BPS_WRITE].avg =
409 qemu_opt_get_number(opts, "throttling.bps-write", 0);
410 cfg.buckets[THROTTLE_OPS_TOTAL].avg =
411 qemu_opt_get_number(opts, "throttling.iops-total", 0);
412 cfg.buckets[THROTTLE_OPS_READ].avg =
413 qemu_opt_get_number(opts, "throttling.iops-read", 0);
414 cfg.buckets[THROTTLE_OPS_WRITE].avg =
415 qemu_opt_get_number(opts, "throttling.iops-write", 0);
416
417 cfg.buckets[THROTTLE_BPS_TOTAL].max =
418 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
419 cfg.buckets[THROTTLE_BPS_READ].max =
420 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
421 cfg.buckets[THROTTLE_BPS_WRITE].max =
422 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
423 cfg.buckets[THROTTLE_OPS_TOTAL].max =
424 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
425 cfg.buckets[THROTTLE_OPS_READ].max =
426 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
427 cfg.buckets[THROTTLE_OPS_WRITE].max =
428 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
429
430 cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0);
431
432 if (!check_throttle_config(&cfg, &error)) {
433 error_propagate(errp, error);
434 goto early_err;
435 }
436
437 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
438 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
439 on_write_error = parse_block_error_action(buf, 0, &error);
440 if (error) {
441 error_propagate(errp, error);
442 goto early_err;
443 }
444 }
445
446 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
447 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
448 on_read_error = parse_block_error_action(buf, 1, &error);
449 if (error) {
450 error_propagate(errp, error);
451 goto early_err;
452 }
453 }
454
455 /* init */
456 dinfo = g_malloc0(sizeof(*dinfo));
457 dinfo->id = g_strdup(qemu_opts_id(opts));
458 dinfo->bdrv = bdrv_new(dinfo->id, &error);
459 if (error) {
460 error_propagate(errp, error);
461 goto bdrv_new_err;
462 }
463 dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
464 dinfo->bdrv->read_only = ro;
465 dinfo->refcount = 1;
466 if (serial != NULL) {
467 dinfo->serial = g_strdup(serial);
468 }
469 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
470
471 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
472
473 /* disk I/O throttling */
474 if (throttle_enabled(&cfg)) {
475 bdrv_io_limits_enable(dinfo->bdrv);
476 bdrv_set_io_limits(dinfo->bdrv, &cfg);
477 }
478
479 if (!file || !*file) {
480 if (has_driver_specific_opts) {
481 file = NULL;
482 } else {
483 QDECREF(bs_opts);
484 qemu_opts_del(opts);
485 return dinfo;
486 }
487 }
488 if (snapshot) {
489 /* always use cache=unsafe with snapshot */
490 bdrv_flags &= ~BDRV_O_CACHE_MASK;
491 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
492 }
493
494 if (copy_on_read) {
495 bdrv_flags |= BDRV_O_COPY_ON_READ;
496 }
497
498 if (runstate_check(RUN_STATE_INMIGRATE)) {
499 bdrv_flags |= BDRV_O_INCOMING;
500 }
501
502 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
503
504 QINCREF(bs_opts);
505 ret = bdrv_open(&dinfo->bdrv, file, NULL, bs_opts, bdrv_flags, drv, &error);
506
507 if (ret < 0) {
508 error_setg(errp, "could not open disk image %s: %s",
509 file ?: dinfo->id, error_get_pretty(error));
510 error_free(error);
511 goto err;
512 }
513
514 if (bdrv_key_required(dinfo->bdrv))
515 autostart = 0;
516
517 QDECREF(bs_opts);
518 qemu_opts_del(opts);
519
520 return dinfo;
521
522 err:
523 bdrv_unref(dinfo->bdrv);
524 QTAILQ_REMOVE(&drives, dinfo, next);
525 bdrv_new_err:
526 g_free(dinfo->id);
527 g_free(dinfo);
528 early_err:
529 QDECREF(bs_opts);
530 qemu_opts_del(opts);
531 return NULL;
532 }
533
534 static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to)
535 {
536 const char *value;
537
538 value = qemu_opt_get(opts, from);
539 if (value) {
540 qemu_opt_set(opts, to, value);
541 qemu_opt_unset(opts, from);
542 }
543 }
544
545 QemuOptsList qemu_legacy_drive_opts = {
546 .name = "drive",
547 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
548 .desc = {
549 {
550 .name = "bus",
551 .type = QEMU_OPT_NUMBER,
552 .help = "bus number",
553 },{
554 .name = "unit",
555 .type = QEMU_OPT_NUMBER,
556 .help = "unit number (i.e. lun for scsi)",
557 },{
558 .name = "index",
559 .type = QEMU_OPT_NUMBER,
560 .help = "index number",
561 },{
562 .name = "media",
563 .type = QEMU_OPT_STRING,
564 .help = "media type (disk, cdrom)",
565 },{
566 .name = "if",
567 .type = QEMU_OPT_STRING,
568 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
569 },{
570 .name = "cyls",
571 .type = QEMU_OPT_NUMBER,
572 .help = "number of cylinders (ide disk geometry)",
573 },{
574 .name = "heads",
575 .type = QEMU_OPT_NUMBER,
576 .help = "number of heads (ide disk geometry)",
577 },{
578 .name = "secs",
579 .type = QEMU_OPT_NUMBER,
580 .help = "number of sectors (ide disk geometry)",
581 },{
582 .name = "trans",
583 .type = QEMU_OPT_STRING,
584 .help = "chs translation (auto, lba, none)",
585 },{
586 .name = "boot",
587 .type = QEMU_OPT_BOOL,
588 .help = "(deprecated, ignored)",
589 },{
590 .name = "addr",
591 .type = QEMU_OPT_STRING,
592 .help = "pci address (virtio only)",
593 },{
594 .name = "file",
595 .type = QEMU_OPT_STRING,
596 .help = "file name",
597 },
598
599 /* Options that are passed on, but have special semantics with -drive */
600 {
601 .name = "read-only",
602 .type = QEMU_OPT_BOOL,
603 .help = "open drive file as read-only",
604 },{
605 .name = "rerror",
606 .type = QEMU_OPT_STRING,
607 .help = "read error action",
608 },{
609 .name = "werror",
610 .type = QEMU_OPT_STRING,
611 .help = "write error action",
612 },{
613 .name = "copy-on-read",
614 .type = QEMU_OPT_BOOL,
615 .help = "copy read data from backing file into image file",
616 },
617
618 { /* end of list */ }
619 },
620 };
621
622 DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type)
623 {
624 const char *value;
625 DriveInfo *dinfo = NULL;
626 QDict *bs_opts;
627 QemuOpts *legacy_opts;
628 DriveMediaType media = MEDIA_DISK;
629 BlockInterfaceType type;
630 int cyls, heads, secs, translation;
631 int max_devs, bus_id, unit_id, index;
632 const char *devaddr;
633 const char *werror, *rerror;
634 bool read_only = false;
635 bool copy_on_read;
636 const char *filename;
637 Error *local_err = NULL;
638
639 /* Change legacy command line options into QMP ones */
640 qemu_opt_rename(all_opts, "iops", "throttling.iops-total");
641 qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read");
642 qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write");
643
644 qemu_opt_rename(all_opts, "bps", "throttling.bps-total");
645 qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read");
646 qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write");
647
648 qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max");
649 qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max");
650 qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max");
651
652 qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max");
653 qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max");
654 qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max");
655
656 qemu_opt_rename(all_opts,
657 "iops_size", "throttling.iops-size");
658
659 qemu_opt_rename(all_opts, "readonly", "read-only");
660
661 value = qemu_opt_get(all_opts, "cache");
662 if (value) {
663 int flags = 0;
664
665 if (bdrv_parse_cache_flags(value, &flags) != 0) {
666 error_report("invalid cache option");
667 return NULL;
668 }
669
670 /* Specific options take precedence */
671 if (!qemu_opt_get(all_opts, "cache.writeback")) {
672 qemu_opt_set_bool(all_opts, "cache.writeback",
673 !!(flags & BDRV_O_CACHE_WB));
674 }
675 if (!qemu_opt_get(all_opts, "cache.direct")) {
676 qemu_opt_set_bool(all_opts, "cache.direct",
677 !!(flags & BDRV_O_NOCACHE));
678 }
679 if (!qemu_opt_get(all_opts, "cache.no-flush")) {
680 qemu_opt_set_bool(all_opts, "cache.no-flush",
681 !!(flags & BDRV_O_NO_FLUSH));
682 }
683 qemu_opt_unset(all_opts, "cache");
684 }
685
686 /* Get a QDict for processing the options */
687 bs_opts = qdict_new();
688 qemu_opts_to_qdict(all_opts, bs_opts);
689
690 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
691 &error_abort);
692 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
693 if (local_err) {
694 qerror_report_err(local_err);
695 error_free(local_err);
696 goto fail;
697 }
698
699 /* Deprecated option boot=[on|off] */
700 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
701 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
702 "ignored. Future versions will reject this parameter. Please "
703 "update your scripts.\n");
704 }
705
706 /* Media type */
707 value = qemu_opt_get(legacy_opts, "media");
708 if (value) {
709 if (!strcmp(value, "disk")) {
710 media = MEDIA_DISK;
711 } else if (!strcmp(value, "cdrom")) {
712 media = MEDIA_CDROM;
713 read_only = true;
714 } else {
715 error_report("'%s' invalid media", value);
716 goto fail;
717 }
718 }
719
720 /* copy-on-read is disabled with a warning for read-only devices */
721 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
722 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
723
724 if (read_only && copy_on_read) {
725 error_report("warning: disabling copy-on-read on read-only drive");
726 copy_on_read = false;
727 }
728
729 qdict_put(bs_opts, "read-only",
730 qstring_from_str(read_only ? "on" : "off"));
731 qdict_put(bs_opts, "copy-on-read",
732 qstring_from_str(copy_on_read ? "on" :"off"));
733
734 /* Controller type */
735 value = qemu_opt_get(legacy_opts, "if");
736 if (value) {
737 for (type = 0;
738 type < IF_COUNT && strcmp(value, if_name[type]);
739 type++) {
740 }
741 if (type == IF_COUNT) {
742 error_report("unsupported bus type '%s'", value);
743 goto fail;
744 }
745 } else {
746 type = block_default_type;
747 }
748
749 /* Geometry */
750 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
751 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
752 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
753
754 if (cyls || heads || secs) {
755 if (cyls < 1) {
756 error_report("invalid physical cyls number");
757 goto fail;
758 }
759 if (heads < 1) {
760 error_report("invalid physical heads number");
761 goto fail;
762 }
763 if (secs < 1) {
764 error_report("invalid physical secs number");
765 goto fail;
766 }
767 }
768
769 translation = BIOS_ATA_TRANSLATION_AUTO;
770 value = qemu_opt_get(legacy_opts, "trans");
771 if (value != NULL) {
772 if (!cyls) {
773 error_report("'%s' trans must be used with cyls, heads and secs",
774 value);
775 goto fail;
776 }
777 if (!strcmp(value, "none")) {
778 translation = BIOS_ATA_TRANSLATION_NONE;
779 } else if (!strcmp(value, "lba")) {
780 translation = BIOS_ATA_TRANSLATION_LBA;
781 } else if (!strcmp(value, "large")) {
782 translation = BIOS_ATA_TRANSLATION_LARGE;
783 } else if (!strcmp(value, "rechs")) {
784 translation = BIOS_ATA_TRANSLATION_RECHS;
785 } else if (!strcmp(value, "auto")) {
786 translation = BIOS_ATA_TRANSLATION_AUTO;
787 } else {
788 error_report("'%s' invalid translation type", value);
789 goto fail;
790 }
791 }
792
793 if (media == MEDIA_CDROM) {
794 if (cyls || secs || heads) {
795 error_report("CHS can't be set with media=cdrom");
796 goto fail;
797 }
798 }
799
800 /* Device address specified by bus/unit or index.
801 * If none was specified, try to find the first free one. */
802 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
803 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
804 index = qemu_opt_get_number(legacy_opts, "index", -1);
805
806 max_devs = if_max_devs[type];
807
808 if (index != -1) {
809 if (bus_id != 0 || unit_id != -1) {
810 error_report("index cannot be used with bus and unit");
811 goto fail;
812 }
813 bus_id = drive_index_to_bus_id(type, index);
814 unit_id = drive_index_to_unit_id(type, index);
815 }
816
817 if (unit_id == -1) {
818 unit_id = 0;
819 while (drive_get(type, bus_id, unit_id) != NULL) {
820 unit_id++;
821 if (max_devs && unit_id >= max_devs) {
822 unit_id -= max_devs;
823 bus_id++;
824 }
825 }
826 }
827
828 if (max_devs && unit_id >= max_devs) {
829 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
830 goto fail;
831 }
832
833 if (drive_get(type, bus_id, unit_id) != NULL) {
834 error_report("drive with bus=%d, unit=%d (index=%d) exists",
835 bus_id, unit_id, index);
836 goto fail;
837 }
838
839 /* no id supplied -> create one */
840 if (qemu_opts_id(all_opts) == NULL) {
841 char *new_id;
842 const char *mediastr = "";
843 if (type == IF_IDE || type == IF_SCSI) {
844 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
845 }
846 if (max_devs) {
847 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
848 mediastr, unit_id);
849 } else {
850 new_id = g_strdup_printf("%s%s%i", if_name[type],
851 mediastr, unit_id);
852 }
853 qdict_put(bs_opts, "id", qstring_from_str(new_id));
854 g_free(new_id);
855 }
856
857 /* Add virtio block device */
858 devaddr = qemu_opt_get(legacy_opts, "addr");
859 if (devaddr && type != IF_VIRTIO) {
860 error_report("addr is not supported by this bus type");
861 goto fail;
862 }
863
864 if (type == IF_VIRTIO) {
865 QemuOpts *devopts;
866 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
867 &error_abort);
868 if (arch_type == QEMU_ARCH_S390X) {
869 qemu_opt_set(devopts, "driver", "virtio-blk-s390");
870 } else {
871 qemu_opt_set(devopts, "driver", "virtio-blk-pci");
872 }
873 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"));
874 if (devaddr) {
875 qemu_opt_set(devopts, "addr", devaddr);
876 }
877 }
878
879 filename = qemu_opt_get(legacy_opts, "file");
880
881 /* Check werror/rerror compatibility with if=... */
882 werror = qemu_opt_get(legacy_opts, "werror");
883 if (werror != NULL) {
884 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
885 type != IF_NONE) {
886 error_report("werror is not supported by this bus type");
887 goto fail;
888 }
889 qdict_put(bs_opts, "werror", qstring_from_str(werror));
890 }
891
892 rerror = qemu_opt_get(legacy_opts, "rerror");
893 if (rerror != NULL) {
894 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
895 type != IF_NONE) {
896 error_report("rerror is not supported by this bus type");
897 goto fail;
898 }
899 qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
900 }
901
902 /* Actual block device init: Functionality shared with blockdev-add */
903 dinfo = blockdev_init(filename, bs_opts, &local_err);
904 if (dinfo == NULL) {
905 if (local_err) {
906 qerror_report_err(local_err);
907 error_free(local_err);
908 }
909 goto fail;
910 } else {
911 assert(!local_err);
912 }
913
914 /* Set legacy DriveInfo fields */
915 dinfo->enable_auto_del = true;
916 dinfo->opts = all_opts;
917
918 dinfo->cyls = cyls;
919 dinfo->heads = heads;
920 dinfo->secs = secs;
921 dinfo->trans = translation;
922
923 dinfo->type = type;
924 dinfo->bus = bus_id;
925 dinfo->unit = unit_id;
926 dinfo->devaddr = devaddr;
927
928 switch(type) {
929 case IF_IDE:
930 case IF_SCSI:
931 case IF_XEN:
932 case IF_NONE:
933 dinfo->media_cd = media == MEDIA_CDROM;
934 break;
935 default:
936 break;
937 }
938
939 fail:
940 qemu_opts_del(legacy_opts);
941 return dinfo;
942 }
943
944 void do_commit(Monitor *mon, const QDict *qdict)
945 {
946 const char *device = qdict_get_str(qdict, "device");
947 BlockDriverState *bs;
948 int ret;
949
950 if (!strcmp(device, "all")) {
951 ret = bdrv_commit_all();
952 } else {
953 bs = bdrv_find(device);
954 if (!bs) {
955 monitor_printf(mon, "Device '%s' not found\n", device);
956 return;
957 }
958 ret = bdrv_commit(bs);
959 }
960 if (ret < 0) {
961 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
962 strerror(-ret));
963 }
964 }
965
966 static void blockdev_do_action(int kind, void *data, Error **errp)
967 {
968 TransactionAction action;
969 TransactionActionList list;
970
971 action.kind = kind;
972 action.data = data;
973 list.value = &action;
974 list.next = NULL;
975 qmp_transaction(&list, errp);
976 }
977
978 void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
979 bool has_node_name, const char *node_name,
980 const char *snapshot_file,
981 bool has_snapshot_node_name,
982 const char *snapshot_node_name,
983 bool has_format, const char *format,
984 bool has_mode, NewImageMode mode, Error **errp)
985 {
986 BlockdevSnapshot snapshot = {
987 .has_device = has_device,
988 .device = (char *) device,
989 .has_node_name = has_node_name,
990 .node_name = (char *) node_name,
991 .snapshot_file = (char *) snapshot_file,
992 .has_snapshot_node_name = has_snapshot_node_name,
993 .snapshot_node_name = (char *) snapshot_node_name,
994 .has_format = has_format,
995 .format = (char *) format,
996 .has_mode = has_mode,
997 .mode = mode,
998 };
999 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
1000 &snapshot, errp);
1001 }
1002
1003 void qmp_blockdev_snapshot_internal_sync(const char *device,
1004 const char *name,
1005 Error **errp)
1006 {
1007 BlockdevSnapshotInternal snapshot = {
1008 .device = (char *) device,
1009 .name = (char *) name
1010 };
1011
1012 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
1013 &snapshot, errp);
1014 }
1015
1016 SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1017 bool has_id,
1018 const char *id,
1019 bool has_name,
1020 const char *name,
1021 Error **errp)
1022 {
1023 BlockDriverState *bs = bdrv_find(device);
1024 QEMUSnapshotInfo sn;
1025 Error *local_err = NULL;
1026 SnapshotInfo *info = NULL;
1027 int ret;
1028
1029 if (!bs) {
1030 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1031 return NULL;
1032 }
1033
1034 if (!has_id) {
1035 id = NULL;
1036 }
1037
1038 if (!has_name) {
1039 name = NULL;
1040 }
1041
1042 if (!id && !name) {
1043 error_setg(errp, "Name or id must be provided");
1044 return NULL;
1045 }
1046
1047 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
1048 if (local_err) {
1049 error_propagate(errp, local_err);
1050 return NULL;
1051 }
1052 if (!ret) {
1053 error_setg(errp,
1054 "Snapshot with id '%s' and name '%s' does not exist on "
1055 "device '%s'",
1056 STR_OR_NULL(id), STR_OR_NULL(name), device);
1057 return NULL;
1058 }
1059
1060 bdrv_snapshot_delete(bs, id, name, &local_err);
1061 if (local_err) {
1062 error_propagate(errp, local_err);
1063 return NULL;
1064 }
1065
1066 info = g_malloc0(sizeof(SnapshotInfo));
1067 info->id = g_strdup(sn.id_str);
1068 info->name = g_strdup(sn.name);
1069 info->date_nsec = sn.date_nsec;
1070 info->date_sec = sn.date_sec;
1071 info->vm_state_size = sn.vm_state_size;
1072 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1073 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1074
1075 return info;
1076 }
1077
1078 /* New and old BlockDriverState structs for group snapshots */
1079
1080 typedef struct BlkTransactionState BlkTransactionState;
1081
1082 /* Only prepare() may fail. In a single transaction, only one of commit() or
1083 abort() will be called, clean() will always be called if it present. */
1084 typedef struct BdrvActionOps {
1085 /* Size of state struct, in bytes. */
1086 size_t instance_size;
1087 /* Prepare the work, must NOT be NULL. */
1088 void (*prepare)(BlkTransactionState *common, Error **errp);
1089 /* Commit the changes, can be NULL. */
1090 void (*commit)(BlkTransactionState *common);
1091 /* Abort the changes on fail, can be NULL. */
1092 void (*abort)(BlkTransactionState *common);
1093 /* Clean up resource in the end, can be NULL. */
1094 void (*clean)(BlkTransactionState *common);
1095 } BdrvActionOps;
1096
1097 /*
1098 * This structure must be arranged as first member in child type, assuming
1099 * that compiler will also arrange it to the same address with parent instance.
1100 * Later it will be used in free().
1101 */
1102 struct BlkTransactionState {
1103 TransactionAction *action;
1104 const BdrvActionOps *ops;
1105 QSIMPLEQ_ENTRY(BlkTransactionState) entry;
1106 };
1107
1108 /* internal snapshot private data */
1109 typedef struct InternalSnapshotState {
1110 BlkTransactionState common;
1111 BlockDriverState *bs;
1112 QEMUSnapshotInfo sn;
1113 } InternalSnapshotState;
1114
1115 static void internal_snapshot_prepare(BlkTransactionState *common,
1116 Error **errp)
1117 {
1118 Error *local_err = NULL;
1119 const char *device;
1120 const char *name;
1121 BlockDriverState *bs;
1122 QEMUSnapshotInfo old_sn, *sn;
1123 bool ret;
1124 qemu_timeval tv;
1125 BlockdevSnapshotInternal *internal;
1126 InternalSnapshotState *state;
1127 int ret1;
1128
1129 g_assert(common->action->kind ==
1130 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
1131 internal = common->action->blockdev_snapshot_internal_sync;
1132 state = DO_UPCAST(InternalSnapshotState, common, common);
1133
1134 /* 1. parse input */
1135 device = internal->device;
1136 name = internal->name;
1137
1138 /* 2. check for validation */
1139 bs = bdrv_find(device);
1140 if (!bs) {
1141 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1142 return;
1143 }
1144
1145 if (!bdrv_is_inserted(bs)) {
1146 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1147 return;
1148 }
1149
1150 if (bdrv_is_read_only(bs)) {
1151 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1152 return;
1153 }
1154
1155 if (!bdrv_can_snapshot(bs)) {
1156 error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
1157 bs->drv->format_name, device, "internal snapshot");
1158 return;
1159 }
1160
1161 if (!strlen(name)) {
1162 error_setg(errp, "Name is empty");
1163 return;
1164 }
1165
1166 /* check whether a snapshot with name exist */
1167 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1168 &local_err);
1169 if (local_err) {
1170 error_propagate(errp, local_err);
1171 return;
1172 } else if (ret) {
1173 error_setg(errp,
1174 "Snapshot with name '%s' already exists on device '%s'",
1175 name, device);
1176 return;
1177 }
1178
1179 /* 3. take the snapshot */
1180 sn = &state->sn;
1181 pstrcpy(sn->name, sizeof(sn->name), name);
1182 qemu_gettimeofday(&tv);
1183 sn->date_sec = tv.tv_sec;
1184 sn->date_nsec = tv.tv_usec * 1000;
1185 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1186
1187 ret1 = bdrv_snapshot_create(bs, sn);
1188 if (ret1 < 0) {
1189 error_setg_errno(errp, -ret1,
1190 "Failed to create snapshot '%s' on device '%s'",
1191 name, device);
1192 return;
1193 }
1194
1195 /* 4. succeed, mark a snapshot is created */
1196 state->bs = bs;
1197 }
1198
1199 static void internal_snapshot_abort(BlkTransactionState *common)
1200 {
1201 InternalSnapshotState *state =
1202 DO_UPCAST(InternalSnapshotState, common, common);
1203 BlockDriverState *bs = state->bs;
1204 QEMUSnapshotInfo *sn = &state->sn;
1205 Error *local_error = NULL;
1206
1207 if (!bs) {
1208 return;
1209 }
1210
1211 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
1212 error_report("Failed to delete snapshot with id '%s' and name '%s' on "
1213 "device '%s' in abort: %s",
1214 sn->id_str,
1215 sn->name,
1216 bdrv_get_device_name(bs),
1217 error_get_pretty(local_error));
1218 error_free(local_error);
1219 }
1220 }
1221
1222 /* external snapshot private data */
1223 typedef struct ExternalSnapshotState {
1224 BlkTransactionState common;
1225 BlockDriverState *old_bs;
1226 BlockDriverState *new_bs;
1227 } ExternalSnapshotState;
1228
1229 static void external_snapshot_prepare(BlkTransactionState *common,
1230 Error **errp)
1231 {
1232 BlockDriver *drv;
1233 int flags, ret;
1234 QDict *options = NULL;
1235 Error *local_err = NULL;
1236 bool has_device = false;
1237 const char *device;
1238 bool has_node_name = false;
1239 const char *node_name;
1240 bool has_snapshot_node_name = false;
1241 const char *snapshot_node_name;
1242 const char *new_image_file;
1243 const char *format = "qcow2";
1244 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1245 ExternalSnapshotState *state =
1246 DO_UPCAST(ExternalSnapshotState, common, common);
1247 TransactionAction *action = common->action;
1248
1249 /* get parameters */
1250 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
1251
1252 has_device = action->blockdev_snapshot_sync->has_device;
1253 device = action->blockdev_snapshot_sync->device;
1254 has_node_name = action->blockdev_snapshot_sync->has_node_name;
1255 node_name = action->blockdev_snapshot_sync->node_name;
1256 has_snapshot_node_name =
1257 action->blockdev_snapshot_sync->has_snapshot_node_name;
1258 snapshot_node_name = action->blockdev_snapshot_sync->snapshot_node_name;
1259
1260 new_image_file = action->blockdev_snapshot_sync->snapshot_file;
1261 if (action->blockdev_snapshot_sync->has_format) {
1262 format = action->blockdev_snapshot_sync->format;
1263 }
1264 if (action->blockdev_snapshot_sync->has_mode) {
1265 mode = action->blockdev_snapshot_sync->mode;
1266 }
1267
1268 /* start processing */
1269 drv = bdrv_find_format(format);
1270 if (!drv) {
1271 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1272 return;
1273 }
1274
1275 state->old_bs = bdrv_lookup_bs(has_device ? device : NULL,
1276 has_node_name ? node_name : NULL,
1277 &local_err);
1278 if (local_err) {
1279 error_propagate(errp, local_err);
1280 return;
1281 }
1282
1283 if (has_node_name && !has_snapshot_node_name) {
1284 error_setg(errp, "New snapshot node name missing");
1285 return;
1286 }
1287
1288 if (has_snapshot_node_name && bdrv_find_node(snapshot_node_name)) {
1289 error_setg(errp, "New snapshot node name already existing");
1290 return;
1291 }
1292
1293 if (!bdrv_is_inserted(state->old_bs)) {
1294 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1295 return;
1296 }
1297
1298 if (bdrv_in_use(state->old_bs)) {
1299 error_set(errp, QERR_DEVICE_IN_USE, device);
1300 return;
1301 }
1302
1303 if (!bdrv_is_read_only(state->old_bs)) {
1304 if (bdrv_flush(state->old_bs)) {
1305 error_set(errp, QERR_IO_ERROR);
1306 return;
1307 }
1308 }
1309
1310 if (!bdrv_is_first_non_filter(state->old_bs)) {
1311 error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
1312 return;
1313 }
1314
1315 flags = state->old_bs->open_flags;
1316
1317 /* create new image w/backing file */
1318 if (mode != NEW_IMAGE_MODE_EXISTING) {
1319 bdrv_img_create(new_image_file, format,
1320 state->old_bs->filename,
1321 state->old_bs->drv->format_name,
1322 NULL, -1, flags, &local_err, false);
1323 if (local_err) {
1324 error_propagate(errp, local_err);
1325 return;
1326 }
1327 }
1328
1329 if (has_snapshot_node_name) {
1330 options = qdict_new();
1331 qdict_put(options, "node-name",
1332 qstring_from_str(snapshot_node_name));
1333 }
1334
1335 /* TODO Inherit bs->options or only take explicit options with an
1336 * extended QMP command? */
1337 assert(state->new_bs == NULL);
1338 ret = bdrv_open(&state->new_bs, new_image_file, NULL, options,
1339 flags | BDRV_O_NO_BACKING, drv, &local_err);
1340 /* We will manually add the backing_hd field to the bs later */
1341 if (ret != 0) {
1342 error_propagate(errp, local_err);
1343 }
1344 }
1345
1346 static void external_snapshot_commit(BlkTransactionState *common)
1347 {
1348 ExternalSnapshotState *state =
1349 DO_UPCAST(ExternalSnapshotState, common, common);
1350
1351 /* This removes our old bs and adds the new bs */
1352 bdrv_append(state->new_bs, state->old_bs);
1353 /* We don't need (or want) to use the transactional
1354 * bdrv_reopen_multiple() across all the entries at once, because we
1355 * don't want to abort all of them if one of them fails the reopen */
1356 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
1357 NULL);
1358 }
1359
1360 static void external_snapshot_abort(BlkTransactionState *common)
1361 {
1362 ExternalSnapshotState *state =
1363 DO_UPCAST(ExternalSnapshotState, common, common);
1364 if (state->new_bs) {
1365 bdrv_unref(state->new_bs);
1366 }
1367 }
1368
1369 typedef struct DriveBackupState {
1370 BlkTransactionState common;
1371 BlockDriverState *bs;
1372 BlockJob *job;
1373 } DriveBackupState;
1374
1375 static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
1376 {
1377 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1378 DriveBackup *backup;
1379 Error *local_err = NULL;
1380
1381 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1382 backup = common->action->drive_backup;
1383
1384 qmp_drive_backup(backup->device, backup->target,
1385 backup->has_format, backup->format,
1386 backup->sync,
1387 backup->has_mode, backup->mode,
1388 backup->has_speed, backup->speed,
1389 backup->has_on_source_error, backup->on_source_error,
1390 backup->has_on_target_error, backup->on_target_error,
1391 &local_err);
1392 if (local_err) {
1393 error_propagate(errp, local_err);
1394 state->bs = NULL;
1395 state->job = NULL;
1396 return;
1397 }
1398
1399 state->bs = bdrv_find(backup->device);
1400 state->job = state->bs->job;
1401 }
1402
1403 static void drive_backup_abort(BlkTransactionState *common)
1404 {
1405 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1406 BlockDriverState *bs = state->bs;
1407
1408 /* Only cancel if it's the job we started */
1409 if (bs && bs->job && bs->job == state->job) {
1410 block_job_cancel_sync(bs->job);
1411 }
1412 }
1413
1414 static void abort_prepare(BlkTransactionState *common, Error **errp)
1415 {
1416 error_setg(errp, "Transaction aborted using Abort action");
1417 }
1418
1419 static void abort_commit(BlkTransactionState *common)
1420 {
1421 g_assert_not_reached(); /* this action never succeeds */
1422 }
1423
1424 static const BdrvActionOps actions[] = {
1425 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
1426 .instance_size = sizeof(ExternalSnapshotState),
1427 .prepare = external_snapshot_prepare,
1428 .commit = external_snapshot_commit,
1429 .abort = external_snapshot_abort,
1430 },
1431 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1432 .instance_size = sizeof(DriveBackupState),
1433 .prepare = drive_backup_prepare,
1434 .abort = drive_backup_abort,
1435 },
1436 [TRANSACTION_ACTION_KIND_ABORT] = {
1437 .instance_size = sizeof(BlkTransactionState),
1438 .prepare = abort_prepare,
1439 .commit = abort_commit,
1440 },
1441 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
1442 .instance_size = sizeof(InternalSnapshotState),
1443 .prepare = internal_snapshot_prepare,
1444 .abort = internal_snapshot_abort,
1445 },
1446 };
1447
1448 /*
1449 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1450 * then we do not pivot any of the devices in the group, and abandon the
1451 * snapshots
1452 */
1453 void qmp_transaction(TransactionActionList *dev_list, Error **errp)
1454 {
1455 TransactionActionList *dev_entry = dev_list;
1456 BlkTransactionState *state, *next;
1457 Error *local_err = NULL;
1458
1459 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
1460 QSIMPLEQ_INIT(&snap_bdrv_states);
1461
1462 /* drain all i/o before any snapshots */
1463 bdrv_drain_all();
1464
1465 /* We don't do anything in this loop that commits us to the snapshot */
1466 while (NULL != dev_entry) {
1467 TransactionAction *dev_info = NULL;
1468 const BdrvActionOps *ops;
1469
1470 dev_info = dev_entry->value;
1471 dev_entry = dev_entry->next;
1472
1473 assert(dev_info->kind < ARRAY_SIZE(actions));
1474
1475 ops = &actions[dev_info->kind];
1476 assert(ops->instance_size > 0);
1477
1478 state = g_malloc0(ops->instance_size);
1479 state->ops = ops;
1480 state->action = dev_info;
1481 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
1482
1483 state->ops->prepare(state, &local_err);
1484 if (local_err) {
1485 error_propagate(errp, local_err);
1486 goto delete_and_fail;
1487 }
1488 }
1489
1490 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1491 if (state->ops->commit) {
1492 state->ops->commit(state);
1493 }
1494 }
1495
1496 /* success */
1497 goto exit;
1498
1499 delete_and_fail:
1500 /*
1501 * failure, and it is all-or-none; abandon each new bs, and keep using
1502 * the original bs for all images
1503 */
1504 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1505 if (state->ops->abort) {
1506 state->ops->abort(state);
1507 }
1508 }
1509 exit:
1510 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
1511 if (state->ops->clean) {
1512 state->ops->clean(state);
1513 }
1514 g_free(state);
1515 }
1516 }
1517
1518
1519 static void eject_device(BlockDriverState *bs, int force, Error **errp)
1520 {
1521 if (bdrv_in_use(bs)) {
1522 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
1523 return;
1524 }
1525 if (!bdrv_dev_has_removable_media(bs)) {
1526 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
1527 return;
1528 }
1529
1530 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
1531 bdrv_dev_eject_request(bs, force);
1532 if (!force) {
1533 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
1534 return;
1535 }
1536 }
1537
1538 bdrv_close(bs);
1539 }
1540
1541 void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
1542 {
1543 BlockDriverState *bs;
1544
1545 bs = bdrv_find(device);
1546 if (!bs) {
1547 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1548 return;
1549 }
1550
1551 eject_device(bs, force, errp);
1552 }
1553
1554 void qmp_block_passwd(bool has_device, const char *device,
1555 bool has_node_name, const char *node_name,
1556 const char *password, Error **errp)
1557 {
1558 Error *local_err = NULL;
1559 BlockDriverState *bs;
1560 int err;
1561
1562 bs = bdrv_lookup_bs(has_device ? device : NULL,
1563 has_node_name ? node_name : NULL,
1564 &local_err);
1565 if (local_err) {
1566 error_propagate(errp, local_err);
1567 return;
1568 }
1569
1570 err = bdrv_set_key(bs, password);
1571 if (err == -EINVAL) {
1572 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1573 return;
1574 } else if (err < 0) {
1575 error_set(errp, QERR_INVALID_PASSWORD);
1576 return;
1577 }
1578 }
1579
1580 static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
1581 int bdrv_flags, BlockDriver *drv,
1582 const char *password, Error **errp)
1583 {
1584 Error *local_err = NULL;
1585 int ret;
1586
1587 ret = bdrv_open(&bs, filename, NULL, NULL, bdrv_flags, drv, &local_err);
1588 if (ret < 0) {
1589 error_propagate(errp, local_err);
1590 return;
1591 }
1592
1593 if (bdrv_key_required(bs)) {
1594 if (password) {
1595 if (bdrv_set_key(bs, password) < 0) {
1596 error_set(errp, QERR_INVALID_PASSWORD);
1597 }
1598 } else {
1599 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
1600 bdrv_get_encrypted_filename(bs));
1601 }
1602 } else if (password) {
1603 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1604 }
1605 }
1606
1607 void qmp_change_blockdev(const char *device, const char *filename,
1608 const char *format, Error **errp)
1609 {
1610 BlockDriverState *bs;
1611 BlockDriver *drv = NULL;
1612 int bdrv_flags;
1613 Error *err = NULL;
1614
1615 bs = bdrv_find(device);
1616 if (!bs) {
1617 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1618 return;
1619 }
1620
1621 if (format) {
1622 drv = bdrv_find_whitelisted_format(format, bs->read_only);
1623 if (!drv) {
1624 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1625 return;
1626 }
1627 }
1628
1629 eject_device(bs, 0, &err);
1630 if (err) {
1631 error_propagate(errp, err);
1632 return;
1633 }
1634
1635 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
1636 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
1637
1638 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
1639 }
1640
1641 /* throttling disk I/O limits */
1642 void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
1643 int64_t bps_wr,
1644 int64_t iops,
1645 int64_t iops_rd,
1646 int64_t iops_wr,
1647 bool has_bps_max,
1648 int64_t bps_max,
1649 bool has_bps_rd_max,
1650 int64_t bps_rd_max,
1651 bool has_bps_wr_max,
1652 int64_t bps_wr_max,
1653 bool has_iops_max,
1654 int64_t iops_max,
1655 bool has_iops_rd_max,
1656 int64_t iops_rd_max,
1657 bool has_iops_wr_max,
1658 int64_t iops_wr_max,
1659 bool has_iops_size,
1660 int64_t iops_size, Error **errp)
1661 {
1662 ThrottleConfig cfg;
1663 BlockDriverState *bs;
1664
1665 bs = bdrv_find(device);
1666 if (!bs) {
1667 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1668 return;
1669 }
1670
1671 memset(&cfg, 0, sizeof(cfg));
1672 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
1673 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
1674 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
1675
1676 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
1677 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
1678 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
1679
1680 if (has_bps_max) {
1681 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
1682 }
1683 if (has_bps_rd_max) {
1684 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
1685 }
1686 if (has_bps_wr_max) {
1687 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
1688 }
1689 if (has_iops_max) {
1690 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
1691 }
1692 if (has_iops_rd_max) {
1693 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
1694 }
1695 if (has_iops_wr_max) {
1696 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
1697 }
1698
1699 if (has_iops_size) {
1700 cfg.op_size = iops_size;
1701 }
1702
1703 if (!check_throttle_config(&cfg, errp)) {
1704 return;
1705 }
1706
1707 if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
1708 bdrv_io_limits_enable(bs);
1709 } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) {
1710 bdrv_io_limits_disable(bs);
1711 }
1712
1713 if (bs->io_limits_enabled) {
1714 bdrv_set_io_limits(bs, &cfg);
1715 }
1716 }
1717
1718 int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1719 {
1720 const char *id = qdict_get_str(qdict, "id");
1721 BlockDriverState *bs;
1722
1723 bs = bdrv_find(id);
1724 if (!bs) {
1725 qerror_report(QERR_DEVICE_NOT_FOUND, id);
1726 return -1;
1727 }
1728 if (bdrv_in_use(bs)) {
1729 qerror_report(QERR_DEVICE_IN_USE, id);
1730 return -1;
1731 }
1732
1733 /* quiesce block driver; prevent further io */
1734 bdrv_drain_all();
1735 bdrv_flush(bs);
1736 bdrv_close(bs);
1737
1738 /* if we have a device attached to this BlockDriverState
1739 * then we need to make the drive anonymous until the device
1740 * can be removed. If this is a drive with no device backing
1741 * then we can just get rid of the block driver state right here.
1742 */
1743 if (bdrv_get_attached_dev(bs)) {
1744 bdrv_make_anon(bs);
1745
1746 /* Further I/O must not pause the guest */
1747 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
1748 BLOCKDEV_ON_ERROR_REPORT);
1749 } else {
1750 drive_uninit(drive_get_by_blockdev(bs));
1751 }
1752
1753 return 0;
1754 }
1755
1756 void qmp_block_resize(bool has_device, const char *device,
1757 bool has_node_name, const char *node_name,
1758 int64_t size, Error **errp)
1759 {
1760 Error *local_err = NULL;
1761 BlockDriverState *bs;
1762 int ret;
1763
1764 bs = bdrv_lookup_bs(has_device ? device : NULL,
1765 has_node_name ? node_name : NULL,
1766 &local_err);
1767 if (local_err) {
1768 error_propagate(errp, local_err);
1769 return;
1770 }
1771
1772 if (!bdrv_is_first_non_filter(bs)) {
1773 error_set(errp, QERR_FEATURE_DISABLED, "resize");
1774 return;
1775 }
1776
1777 if (size < 0) {
1778 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
1779 return;
1780 }
1781
1782 /* complete all in-flight operations before resizing the device */
1783 bdrv_drain_all();
1784
1785 ret = bdrv_truncate(bs, size);
1786 switch (ret) {
1787 case 0:
1788 break;
1789 case -ENOMEDIUM:
1790 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1791 break;
1792 case -ENOTSUP:
1793 error_set(errp, QERR_UNSUPPORTED);
1794 break;
1795 case -EACCES:
1796 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1797 break;
1798 case -EBUSY:
1799 error_set(errp, QERR_DEVICE_IN_USE, device);
1800 break;
1801 default:
1802 error_setg_errno(errp, -ret, "Could not resize");
1803 break;
1804 }
1805 }
1806
1807 static void block_job_cb(void *opaque, int ret)
1808 {
1809 BlockDriverState *bs = opaque;
1810 QObject *obj;
1811
1812 trace_block_job_cb(bs, bs->job, ret);
1813
1814 assert(bs->job);
1815 obj = qobject_from_block_job(bs->job);
1816 if (ret < 0) {
1817 QDict *dict = qobject_to_qdict(obj);
1818 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1819 }
1820
1821 if (block_job_is_cancelled(bs->job)) {
1822 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1823 } else {
1824 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1825 }
1826 qobject_decref(obj);
1827
1828 bdrv_put_ref_bh_schedule(bs);
1829 }
1830
1831 void qmp_block_stream(const char *device, bool has_base,
1832 const char *base, bool has_speed, int64_t speed,
1833 bool has_on_error, BlockdevOnError on_error,
1834 Error **errp)
1835 {
1836 BlockDriverState *bs;
1837 BlockDriverState *base_bs = NULL;
1838 Error *local_err = NULL;
1839
1840 if (!has_on_error) {
1841 on_error = BLOCKDEV_ON_ERROR_REPORT;
1842 }
1843
1844 bs = bdrv_find(device);
1845 if (!bs) {
1846 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1847 return;
1848 }
1849
1850 if (base) {
1851 base_bs = bdrv_find_backing_image(bs, base);
1852 if (base_bs == NULL) {
1853 error_set(errp, QERR_BASE_NOT_FOUND, base);
1854 return;
1855 }
1856 }
1857
1858 stream_start(bs, base_bs, base, has_speed ? speed : 0,
1859 on_error, block_job_cb, bs, &local_err);
1860 if (local_err) {
1861 error_propagate(errp, local_err);
1862 return;
1863 }
1864
1865 trace_qmp_block_stream(bs, bs->job);
1866 }
1867
1868 void qmp_block_commit(const char *device,
1869 bool has_base, const char *base, const char *top,
1870 bool has_speed, int64_t speed,
1871 Error **errp)
1872 {
1873 BlockDriverState *bs;
1874 BlockDriverState *base_bs, *top_bs;
1875 Error *local_err = NULL;
1876 /* This will be part of the QMP command, if/when the
1877 * BlockdevOnError change for blkmirror makes it in
1878 */
1879 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
1880
1881 if (!has_speed) {
1882 speed = 0;
1883 }
1884
1885 /* drain all i/o before commits */
1886 bdrv_drain_all();
1887
1888 bs = bdrv_find(device);
1889 if (!bs) {
1890 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1891 return;
1892 }
1893
1894 /* default top_bs is the active layer */
1895 top_bs = bs;
1896
1897 if (top) {
1898 if (strcmp(bs->filename, top) != 0) {
1899 top_bs = bdrv_find_backing_image(bs, top);
1900 }
1901 }
1902
1903 if (top_bs == NULL) {
1904 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
1905 return;
1906 }
1907
1908 if (has_base && base) {
1909 base_bs = bdrv_find_backing_image(top_bs, base);
1910 } else {
1911 base_bs = bdrv_find_base(top_bs);
1912 }
1913
1914 if (base_bs == NULL) {
1915 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
1916 return;
1917 }
1918
1919 if (top_bs == bs) {
1920 commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
1921 bs, &local_err);
1922 } else {
1923 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
1924 &local_err);
1925 }
1926 if (local_err != NULL) {
1927 error_propagate(errp, local_err);
1928 return;
1929 }
1930 }
1931
1932 void qmp_drive_backup(const char *device, const char *target,
1933 bool has_format, const char *format,
1934 enum MirrorSyncMode sync,
1935 bool has_mode, enum NewImageMode mode,
1936 bool has_speed, int64_t speed,
1937 bool has_on_source_error, BlockdevOnError on_source_error,
1938 bool has_on_target_error, BlockdevOnError on_target_error,
1939 Error **errp)
1940 {
1941 BlockDriverState *bs;
1942 BlockDriverState *target_bs;
1943 BlockDriverState *source = NULL;
1944 BlockDriver *drv = NULL;
1945 Error *local_err = NULL;
1946 int flags;
1947 int64_t size;
1948 int ret;
1949
1950 if (!has_speed) {
1951 speed = 0;
1952 }
1953 if (!has_on_source_error) {
1954 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
1955 }
1956 if (!has_on_target_error) {
1957 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
1958 }
1959 if (!has_mode) {
1960 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1961 }
1962
1963 bs = bdrv_find(device);
1964 if (!bs) {
1965 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1966 return;
1967 }
1968
1969 if (!bdrv_is_inserted(bs)) {
1970 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1971 return;
1972 }
1973
1974 if (!has_format) {
1975 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
1976 }
1977 if (format) {
1978 drv = bdrv_find_format(format);
1979 if (!drv) {
1980 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1981 return;
1982 }
1983 }
1984
1985 if (bdrv_in_use(bs)) {
1986 error_set(errp, QERR_DEVICE_IN_USE, device);
1987 return;
1988 }
1989
1990 flags = bs->open_flags | BDRV_O_RDWR;
1991
1992 /* See if we have a backing HD we can use to create our new image
1993 * on top of. */
1994 if (sync == MIRROR_SYNC_MODE_TOP) {
1995 source = bs->backing_hd;
1996 if (!source) {
1997 sync = MIRROR_SYNC_MODE_FULL;
1998 }
1999 }
2000 if (sync == MIRROR_SYNC_MODE_NONE) {
2001 source = bs;
2002 }
2003
2004 size = bdrv_getlength(bs);
2005 if (size < 0) {
2006 error_setg_errno(errp, -size, "bdrv_getlength failed");
2007 return;
2008 }
2009
2010 if (mode != NEW_IMAGE_MODE_EXISTING) {
2011 assert(format && drv);
2012 if (source) {
2013 bdrv_img_create(target, format, source->filename,
2014 source->drv->format_name, NULL,
2015 size, flags, &local_err, false);
2016 } else {
2017 bdrv_img_create(target, format, NULL, NULL, NULL,
2018 size, flags, &local_err, false);
2019 }
2020 }
2021
2022 if (local_err) {
2023 error_propagate(errp, local_err);
2024 return;
2025 }
2026
2027 target_bs = NULL;
2028 ret = bdrv_open(&target_bs, target, NULL, NULL, flags, drv, &local_err);
2029 if (ret < 0) {
2030 error_propagate(errp, local_err);
2031 return;
2032 }
2033
2034 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
2035 block_job_cb, bs, &local_err);
2036 if (local_err != NULL) {
2037 bdrv_unref(target_bs);
2038 error_propagate(errp, local_err);
2039 return;
2040 }
2041 }
2042
2043 BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
2044 {
2045 return bdrv_named_nodes_list();
2046 }
2047
2048 #define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
2049
2050 void qmp_drive_mirror(const char *device, const char *target,
2051 bool has_format, const char *format,
2052 enum MirrorSyncMode sync,
2053 bool has_mode, enum NewImageMode mode,
2054 bool has_speed, int64_t speed,
2055 bool has_granularity, uint32_t granularity,
2056 bool has_buf_size, int64_t buf_size,
2057 bool has_on_source_error, BlockdevOnError on_source_error,
2058 bool has_on_target_error, BlockdevOnError on_target_error,
2059 Error **errp)
2060 {
2061 BlockDriverState *bs;
2062 BlockDriverState *source, *target_bs;
2063 BlockDriver *drv = NULL;
2064 Error *local_err = NULL;
2065 int flags;
2066 int64_t size;
2067 int ret;
2068
2069 if (!has_speed) {
2070 speed = 0;
2071 }
2072 if (!has_on_source_error) {
2073 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
2074 }
2075 if (!has_on_target_error) {
2076 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
2077 }
2078 if (!has_mode) {
2079 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
2080 }
2081 if (!has_granularity) {
2082 granularity = 0;
2083 }
2084 if (!has_buf_size) {
2085 buf_size = DEFAULT_MIRROR_BUF_SIZE;
2086 }
2087
2088 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
2089 error_set(errp, QERR_INVALID_PARAMETER, device);
2090 return;
2091 }
2092 if (granularity & (granularity - 1)) {
2093 error_set(errp, QERR_INVALID_PARAMETER, device);
2094 return;
2095 }
2096
2097 bs = bdrv_find(device);
2098 if (!bs) {
2099 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
2100 return;
2101 }
2102
2103 if (!bdrv_is_inserted(bs)) {
2104 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
2105 return;
2106 }
2107
2108 if (!has_format) {
2109 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
2110 }
2111 if (format) {
2112 drv = bdrv_find_format(format);
2113 if (!drv) {
2114 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
2115 return;
2116 }
2117 }
2118
2119 if (bdrv_in_use(bs)) {
2120 error_set(errp, QERR_DEVICE_IN_USE, device);
2121 return;
2122 }
2123
2124 flags = bs->open_flags | BDRV_O_RDWR;
2125 source = bs->backing_hd;
2126 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
2127 sync = MIRROR_SYNC_MODE_FULL;
2128 }
2129 if (sync == MIRROR_SYNC_MODE_NONE) {
2130 source = bs;
2131 }
2132
2133 size = bdrv_getlength(bs);
2134 if (size < 0) {
2135 error_setg_errno(errp, -size, "bdrv_getlength failed");
2136 return;
2137 }
2138
2139 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
2140 && mode != NEW_IMAGE_MODE_EXISTING)
2141 {
2142 /* create new image w/o backing file */
2143 assert(format && drv);
2144 bdrv_img_create(target, format,
2145 NULL, NULL, NULL, size, flags, &local_err, false);
2146 } else {
2147 switch (mode) {
2148 case NEW_IMAGE_MODE_EXISTING:
2149 break;
2150 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
2151 /* create new image with backing file */
2152 bdrv_img_create(target, format,
2153 source->filename,
2154 source->drv->format_name,
2155 NULL, size, flags, &local_err, false);
2156 break;
2157 default:
2158 abort();
2159 }
2160 }
2161
2162 if (local_err) {
2163 error_propagate(errp, local_err);
2164 return;
2165 }
2166
2167 /* Mirroring takes care of copy-on-write using the source's backing
2168 * file.
2169 */
2170 target_bs = NULL;
2171 ret = bdrv_open(&target_bs, target, NULL, NULL, flags | BDRV_O_NO_BACKING,
2172 drv, &local_err);
2173 if (ret < 0) {
2174 error_propagate(errp, local_err);
2175 return;
2176 }
2177
2178 mirror_start(bs, target_bs, speed, granularity, buf_size, sync,
2179 on_source_error, on_target_error,
2180 block_job_cb, bs, &local_err);
2181 if (local_err != NULL) {
2182 bdrv_unref(target_bs);
2183 error_propagate(errp, local_err);
2184 return;
2185 }
2186 }
2187
2188 static BlockJob *find_block_job(const char *device)
2189 {
2190 BlockDriverState *bs;
2191
2192 bs = bdrv_find(device);
2193 if (!bs || !bs->job) {
2194 return NULL;
2195 }
2196 return bs->job;
2197 }
2198
2199 void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
2200 {
2201 BlockJob *job = find_block_job(device);
2202
2203 if (!job) {
2204 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2205 return;
2206 }
2207
2208 block_job_set_speed(job, speed, errp);
2209 }
2210
2211 void qmp_block_job_cancel(const char *device,
2212 bool has_force, bool force, Error **errp)
2213 {
2214 BlockJob *job = find_block_job(device);
2215
2216 if (!has_force) {
2217 force = false;
2218 }
2219
2220 if (!job) {
2221 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2222 return;
2223 }
2224 if (job->paused && !force) {
2225 error_set(errp, QERR_BLOCK_JOB_PAUSED, device);
2226 return;
2227 }
2228
2229 trace_qmp_block_job_cancel(job);
2230 block_job_cancel(job);
2231 }
2232
2233 void qmp_block_job_pause(const char *device, Error **errp)
2234 {
2235 BlockJob *job = find_block_job(device);
2236
2237 if (!job) {
2238 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2239 return;
2240 }
2241
2242 trace_qmp_block_job_pause(job);
2243 block_job_pause(job);
2244 }
2245
2246 void qmp_block_job_resume(const char *device, Error **errp)
2247 {
2248 BlockJob *job = find_block_job(device);
2249
2250 if (!job) {
2251 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2252 return;
2253 }
2254
2255 trace_qmp_block_job_resume(job);
2256 block_job_resume(job);
2257 }
2258
2259 void qmp_block_job_complete(const char *device, Error **errp)
2260 {
2261 BlockJob *job = find_block_job(device);
2262
2263 if (!job) {
2264 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2265 return;
2266 }
2267
2268 trace_qmp_block_job_complete(job);
2269 block_job_complete(job, errp);
2270 }
2271
2272 void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
2273 {
2274 QmpOutputVisitor *ov = qmp_output_visitor_new();
2275 DriveInfo *dinfo;
2276 QObject *obj;
2277 QDict *qdict;
2278 Error *local_err = NULL;
2279
2280 /* Require an ID in the top level */
2281 if (!options->has_id) {
2282 error_setg(errp, "Block device needs an ID");
2283 goto fail;
2284 }
2285
2286 /* TODO Sort it out in raw-posix and drive_init: Reject aio=native with
2287 * cache.direct=false instead of silently switching to aio=threads, except
2288 * if called from drive_init.
2289 *
2290 * For now, simply forbidding the combination for all drivers will do. */
2291 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
2292 bool direct = options->has_cache &&
2293 options->cache->has_direct &&
2294 options->cache->direct;
2295 if (!direct) {
2296 error_setg(errp, "aio=native requires cache.direct=true");
2297 goto fail;
2298 }
2299 }
2300
2301 visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
2302 &options, NULL, &local_err);
2303 if (local_err) {
2304 error_propagate(errp, local_err);
2305 goto fail;
2306 }
2307
2308 obj = qmp_output_get_qobject(ov);
2309 qdict = qobject_to_qdict(obj);
2310
2311 qdict_flatten(qdict);
2312
2313 dinfo = blockdev_init(NULL, qdict, &local_err);
2314 if (local_err) {
2315 error_propagate(errp, local_err);
2316 goto fail;
2317 }
2318
2319 if (bdrv_key_required(dinfo->bdrv)) {
2320 drive_uninit(dinfo);
2321 error_setg(errp, "blockdev-add doesn't support encrypted devices");
2322 goto fail;
2323 }
2324
2325 fail:
2326 qmp_output_visitor_cleanup(ov);
2327 }
2328
2329 static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
2330 {
2331 BlockJobInfoList **prev = opaque;
2332 BlockJob *job = bs->job;
2333
2334 if (job) {
2335 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
2336 elem->value = block_job_query(bs->job);
2337 (*prev)->next = elem;
2338 *prev = elem;
2339 }
2340 }
2341
2342 BlockJobInfoList *qmp_query_block_jobs(Error **errp)
2343 {
2344 /* Dummy is a fake list element for holding the head pointer */
2345 BlockJobInfoList dummy = {};
2346 BlockJobInfoList *prev = &dummy;
2347 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
2348 return dummy.next;
2349 }
2350
2351 QemuOptsList qemu_common_drive_opts = {
2352 .name = "drive",
2353 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
2354 .desc = {
2355 {
2356 .name = "snapshot",
2357 .type = QEMU_OPT_BOOL,
2358 .help = "enable/disable snapshot mode",
2359 },{
2360 .name = "discard",
2361 .type = QEMU_OPT_STRING,
2362 .help = "discard operation (ignore/off, unmap/on)",
2363 },{
2364 .name = "cache.writeback",
2365 .type = QEMU_OPT_BOOL,
2366 .help = "enables writeback mode for any caches",
2367 },{
2368 .name = "cache.direct",
2369 .type = QEMU_OPT_BOOL,
2370 .help = "enables use of O_DIRECT (bypass the host page cache)",
2371 },{
2372 .name = "cache.no-flush",
2373 .type = QEMU_OPT_BOOL,
2374 .help = "ignore any flush requests for the device",
2375 },{
2376 .name = "aio",
2377 .type = QEMU_OPT_STRING,
2378 .help = "host AIO implementation (threads, native)",
2379 },{
2380 .name = "format",
2381 .type = QEMU_OPT_STRING,
2382 .help = "disk format (raw, qcow2, ...)",
2383 },{
2384 .name = "serial",
2385 .type = QEMU_OPT_STRING,
2386 .help = "disk serial number",
2387 },{
2388 .name = "rerror",
2389 .type = QEMU_OPT_STRING,
2390 .help = "read error action",
2391 },{
2392 .name = "werror",
2393 .type = QEMU_OPT_STRING,
2394 .help = "write error action",
2395 },{
2396 .name = "read-only",
2397 .type = QEMU_OPT_BOOL,
2398 .help = "open drive file as read-only",
2399 },{
2400 .name = "throttling.iops-total",
2401 .type = QEMU_OPT_NUMBER,
2402 .help = "limit total I/O operations per second",
2403 },{
2404 .name = "throttling.iops-read",
2405 .type = QEMU_OPT_NUMBER,
2406 .help = "limit read operations per second",
2407 },{
2408 .name = "throttling.iops-write",
2409 .type = QEMU_OPT_NUMBER,
2410 .help = "limit write operations per second",
2411 },{
2412 .name = "throttling.bps-total",
2413 .type = QEMU_OPT_NUMBER,
2414 .help = "limit total bytes per second",
2415 },{
2416 .name = "throttling.bps-read",
2417 .type = QEMU_OPT_NUMBER,
2418 .help = "limit read bytes per second",
2419 },{
2420 .name = "throttling.bps-write",
2421 .type = QEMU_OPT_NUMBER,
2422 .help = "limit write bytes per second",
2423 },{
2424 .name = "throttling.iops-total-max",
2425 .type = QEMU_OPT_NUMBER,
2426 .help = "I/O operations burst",
2427 },{
2428 .name = "throttling.iops-read-max",
2429 .type = QEMU_OPT_NUMBER,
2430 .help = "I/O operations read burst",
2431 },{
2432 .name = "throttling.iops-write-max",
2433 .type = QEMU_OPT_NUMBER,
2434 .help = "I/O operations write burst",
2435 },{
2436 .name = "throttling.bps-total-max",
2437 .type = QEMU_OPT_NUMBER,
2438 .help = "total bytes burst",
2439 },{
2440 .name = "throttling.bps-read-max",
2441 .type = QEMU_OPT_NUMBER,
2442 .help = "total bytes read burst",
2443 },{
2444 .name = "throttling.bps-write-max",
2445 .type = QEMU_OPT_NUMBER,
2446 .help = "total bytes write burst",
2447 },{
2448 .name = "throttling.iops-size",
2449 .type = QEMU_OPT_NUMBER,
2450 .help = "when limiting by iops max size of an I/O in bytes",
2451 },{
2452 .name = "copy-on-read",
2453 .type = QEMU_OPT_BOOL,
2454 .help = "copy read data from backing file into image file",
2455 },
2456 { /* end of list */ }
2457 },
2458 };
2459
2460 QemuOptsList qemu_drive_opts = {
2461 .name = "drive",
2462 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
2463 .desc = {
2464 /*
2465 * no elements => accept any params
2466 * validation will happen later
2467 */
2468 { /* end of list */ }
2469 },
2470 };