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