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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 "sysemu/sysemu.h" | |
42 | #include "block/block_int.h" | |
43 | #include "qmp-commands.h" | |
44 | #include "trace.h" | |
45 | #include "sysemu/arch_init.h" | |
46 | ||
47 | static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); | |
48 | extern QemuOptsList qemu_common_drive_opts; | |
49 | ||
50 | static const char *const if_name[IF_COUNT] = { | |
51 | [IF_NONE] = "none", | |
52 | [IF_IDE] = "ide", | |
53 | [IF_SCSI] = "scsi", | |
54 | [IF_FLOPPY] = "floppy", | |
55 | [IF_PFLASH] = "pflash", | |
56 | [IF_MTD] = "mtd", | |
57 | [IF_SD] = "sd", | |
58 | [IF_VIRTIO] = "virtio", | |
59 | [IF_XEN] = "xen", | |
60 | }; | |
61 | ||
62 | static const int if_max_devs[IF_COUNT] = { | |
63 | /* | |
64 | * Do not change these numbers! They govern how drive option | |
65 | * index maps to unit and bus. That mapping is ABI. | |
66 | * | |
67 | * All controllers used to imlement if=T drives need to support | |
68 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
69 | * Otherwise, some index values map to "impossible" bus, unit | |
70 | * values. | |
71 | * | |
72 | * For instance, if you change [IF_SCSI] to 255, -drive | |
73 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
74 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
75 | * the drive can't be set up. Regression. | |
76 | */ | |
77 | [IF_IDE] = 2, | |
78 | [IF_SCSI] = 7, | |
79 | }; | |
80 | ||
81 | /* | |
82 | * We automatically delete the drive when a device using it gets | |
83 | * unplugged. Questionable feature, but we can't just drop it. | |
84 | * Device models call blockdev_mark_auto_del() to schedule the | |
85 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
86 | * when deletion is actually safe. | |
87 | */ | |
88 | void blockdev_mark_auto_del(BlockDriverState *bs) | |
89 | { | |
90 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
91 | ||
92 | if (bs->job) { | |
93 | block_job_cancel(bs->job); | |
94 | } | |
95 | if (dinfo) { | |
96 | dinfo->auto_del = 1; | |
97 | } | |
98 | } | |
99 | ||
100 | void blockdev_auto_del(BlockDriverState *bs) | |
101 | { | |
102 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
103 | ||
104 | if (dinfo && dinfo->auto_del) { | |
105 | drive_put_ref(dinfo); | |
106 | } | |
107 | } | |
108 | ||
109 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) | |
110 | { | |
111 | int max_devs = if_max_devs[type]; | |
112 | return max_devs ? index / max_devs : 0; | |
113 | } | |
114 | ||
115 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
116 | { | |
117 | int max_devs = if_max_devs[type]; | |
118 | return max_devs ? index % max_devs : index; | |
119 | } | |
120 | ||
121 | QemuOpts *drive_def(const char *optstr) | |
122 | { | |
123 | return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); | |
124 | } | |
125 | ||
126 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
127 | const char *optstr) | |
128 | { | |
129 | QemuOpts *opts; | |
130 | char buf[32]; | |
131 | ||
132 | opts = drive_def(optstr); | |
133 | if (!opts) { | |
134 | return NULL; | |
135 | } | |
136 | if (type != IF_DEFAULT) { | |
137 | qemu_opt_set(opts, "if", if_name[type]); | |
138 | } | |
139 | if (index >= 0) { | |
140 | snprintf(buf, sizeof(buf), "%d", index); | |
141 | qemu_opt_set(opts, "index", buf); | |
142 | } | |
143 | if (file) | |
144 | qemu_opt_set(opts, "file", file); | |
145 | return opts; | |
146 | } | |
147 | ||
148 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
149 | { | |
150 | DriveInfo *dinfo; | |
151 | ||
152 | /* seek interface, bus and unit */ | |
153 | ||
154 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
155 | if (dinfo->type == type && | |
156 | dinfo->bus == bus && | |
157 | dinfo->unit == unit) | |
158 | return dinfo; | |
159 | } | |
160 | ||
161 | return NULL; | |
162 | } | |
163 | ||
164 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) | |
165 | { | |
166 | return drive_get(type, | |
167 | drive_index_to_bus_id(type, index), | |
168 | drive_index_to_unit_id(type, index)); | |
169 | } | |
170 | ||
171 | int drive_get_max_bus(BlockInterfaceType type) | |
172 | { | |
173 | int max_bus; | |
174 | DriveInfo *dinfo; | |
175 | ||
176 | max_bus = -1; | |
177 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
178 | if(dinfo->type == type && | |
179 | dinfo->bus > max_bus) | |
180 | max_bus = dinfo->bus; | |
181 | } | |
182 | return max_bus; | |
183 | } | |
184 | ||
185 | /* Get a block device. This should only be used for single-drive devices | |
186 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
187 | appropriate bus. */ | |
188 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
189 | { | |
190 | static int next_block_unit[IF_COUNT]; | |
191 | ||
192 | return drive_get(type, 0, next_block_unit[type]++); | |
193 | } | |
194 | ||
195 | DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) | |
196 | { | |
197 | DriveInfo *dinfo; | |
198 | ||
199 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
200 | if (dinfo->bdrv == bs) { | |
201 | return dinfo; | |
202 | } | |
203 | } | |
204 | return NULL; | |
205 | } | |
206 | ||
207 | static void bdrv_format_print(void *opaque, const char *name) | |
208 | { | |
209 | error_printf(" %s", name); | |
210 | } | |
211 | ||
212 | static void drive_uninit(DriveInfo *dinfo) | |
213 | { | |
214 | qemu_opts_del(dinfo->opts); | |
215 | bdrv_delete(dinfo->bdrv); | |
216 | g_free(dinfo->id); | |
217 | QTAILQ_REMOVE(&drives, dinfo, next); | |
218 | g_free(dinfo->serial); | |
219 | g_free(dinfo); | |
220 | } | |
221 | ||
222 | void drive_put_ref(DriveInfo *dinfo) | |
223 | { | |
224 | assert(dinfo->refcount); | |
225 | if (--dinfo->refcount == 0) { | |
226 | drive_uninit(dinfo); | |
227 | } | |
228 | } | |
229 | ||
230 | void drive_get_ref(DriveInfo *dinfo) | |
231 | { | |
232 | dinfo->refcount++; | |
233 | } | |
234 | ||
235 | typedef struct { | |
236 | QEMUBH *bh; | |
237 | DriveInfo *dinfo; | |
238 | } DrivePutRefBH; | |
239 | ||
240 | static void drive_put_ref_bh(void *opaque) | |
241 | { | |
242 | DrivePutRefBH *s = opaque; | |
243 | ||
244 | drive_put_ref(s->dinfo); | |
245 | qemu_bh_delete(s->bh); | |
246 | g_free(s); | |
247 | } | |
248 | ||
249 | /* | |
250 | * Release a drive reference in a BH | |
251 | * | |
252 | * It is not possible to use drive_put_ref() from a callback function when the | |
253 | * callers still need the drive. In such cases we schedule a BH to release the | |
254 | * reference. | |
255 | */ | |
256 | static void drive_put_ref_bh_schedule(DriveInfo *dinfo) | |
257 | { | |
258 | DrivePutRefBH *s; | |
259 | ||
260 | s = g_new(DrivePutRefBH, 1); | |
261 | s->bh = qemu_bh_new(drive_put_ref_bh, s); | |
262 | s->dinfo = dinfo; | |
263 | qemu_bh_schedule(s->bh); | |
264 | } | |
265 | ||
266 | static int parse_block_error_action(const char *buf, bool is_read) | |
267 | { | |
268 | if (!strcmp(buf, "ignore")) { | |
269 | return BLOCKDEV_ON_ERROR_IGNORE; | |
270 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
271 | return BLOCKDEV_ON_ERROR_ENOSPC; | |
272 | } else if (!strcmp(buf, "stop")) { | |
273 | return BLOCKDEV_ON_ERROR_STOP; | |
274 | } else if (!strcmp(buf, "report")) { | |
275 | return BLOCKDEV_ON_ERROR_REPORT; | |
276 | } else { | |
277 | error_report("'%s' invalid %s error action", | |
278 | buf, is_read ? "read" : "write"); | |
279 | return -1; | |
280 | } | |
281 | } | |
282 | ||
283 | static bool do_check_io_limits(BlockIOLimit *io_limits, Error **errp) | |
284 | { | |
285 | bool bps_flag; | |
286 | bool iops_flag; | |
287 | ||
288 | assert(io_limits); | |
289 | ||
290 | bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0) | |
291 | && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0) | |
292 | || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0)); | |
293 | iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0) | |
294 | && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0) | |
295 | || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0)); | |
296 | if (bps_flag || iops_flag) { | |
297 | error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " | |
298 | "cannot be used at the same time"); | |
299 | return false; | |
300 | } | |
301 | ||
302 | if (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 || | |
303 | io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 || | |
304 | io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 || | |
305 | io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 || | |
306 | io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 || | |
307 | io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) { | |
308 | error_setg(errp, "bps and iops values must be 0 or greater"); | |
309 | return false; | |
310 | } | |
311 | ||
312 | return true; | |
313 | } | |
314 | ||
315 | static DriveInfo *blockdev_init(QemuOpts *all_opts, | |
316 | BlockInterfaceType block_default_type) | |
317 | { | |
318 | const char *buf; | |
319 | const char *file = NULL; | |
320 | const char *serial; | |
321 | const char *mediastr = ""; | |
322 | BlockInterfaceType type; | |
323 | enum { MEDIA_DISK, MEDIA_CDROM } media; | |
324 | int bus_id, unit_id; | |
325 | int cyls, heads, secs, translation; | |
326 | int max_devs; | |
327 | int index; | |
328 | int ro = 0; | |
329 | int bdrv_flags = 0; | |
330 | int on_read_error, on_write_error; | |
331 | const char *devaddr; | |
332 | DriveInfo *dinfo; | |
333 | BlockIOLimit io_limits; | |
334 | int snapshot = 0; | |
335 | bool copy_on_read; | |
336 | int ret; | |
337 | Error *error = NULL; | |
338 | QemuOpts *opts; | |
339 | QDict *bs_opts; | |
340 | const char *id; | |
341 | bool has_driver_specific_opts; | |
342 | ||
343 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
344 | media = MEDIA_DISK; | |
345 | ||
346 | /* Check common options by copying from all_opts to opts, all other options | |
347 | * are stored in bs_opts. */ | |
348 | id = qemu_opts_id(all_opts); | |
349 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error); | |
350 | if (error_is_set(&error)) { | |
351 | qerror_report_err(error); | |
352 | error_free(error); | |
353 | return NULL; | |
354 | } | |
355 | ||
356 | bs_opts = qdict_new(); | |
357 | qemu_opts_to_qdict(all_opts, bs_opts); | |
358 | qemu_opts_absorb_qdict(opts, bs_opts, &error); | |
359 | if (error_is_set(&error)) { | |
360 | qerror_report_err(error); | |
361 | error_free(error); | |
362 | return NULL; | |
363 | } | |
364 | ||
365 | if (id) { | |
366 | qdict_del(bs_opts, "id"); | |
367 | } | |
368 | ||
369 | has_driver_specific_opts = !!qdict_size(bs_opts); | |
370 | ||
371 | /* extract parameters */ | |
372 | bus_id = qemu_opt_get_number(opts, "bus", 0); | |
373 | unit_id = qemu_opt_get_number(opts, "unit", -1); | |
374 | index = qemu_opt_get_number(opts, "index", -1); | |
375 | ||
376 | cyls = qemu_opt_get_number(opts, "cyls", 0); | |
377 | heads = qemu_opt_get_number(opts, "heads", 0); | |
378 | secs = qemu_opt_get_number(opts, "secs", 0); | |
379 | ||
380 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); | |
381 | ro = qemu_opt_get_bool(opts, "read-only", 0); | |
382 | copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); | |
383 | ||
384 | file = qemu_opt_get(opts, "file"); | |
385 | serial = qemu_opt_get(opts, "serial"); | |
386 | ||
387 | if ((buf = qemu_opt_get(opts, "if")) != NULL) { | |
388 | for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) | |
389 | ; | |
390 | if (type == IF_COUNT) { | |
391 | error_report("unsupported bus type '%s'", buf); | |
392 | return NULL; | |
393 | } | |
394 | } else { | |
395 | type = block_default_type; | |
396 | } | |
397 | ||
398 | max_devs = if_max_devs[type]; | |
399 | ||
400 | if (cyls || heads || secs) { | |
401 | if (cyls < 1) { | |
402 | error_report("invalid physical cyls number"); | |
403 | return NULL; | |
404 | } | |
405 | if (heads < 1) { | |
406 | error_report("invalid physical heads number"); | |
407 | return NULL; | |
408 | } | |
409 | if (secs < 1) { | |
410 | error_report("invalid physical secs number"); | |
411 | return NULL; | |
412 | } | |
413 | } | |
414 | ||
415 | if ((buf = qemu_opt_get(opts, "trans")) != NULL) { | |
416 | if (!cyls) { | |
417 | error_report("'%s' trans must be used with cyls, heads and secs", | |
418 | buf); | |
419 | return NULL; | |
420 | } | |
421 | if (!strcmp(buf, "none")) | |
422 | translation = BIOS_ATA_TRANSLATION_NONE; | |
423 | else if (!strcmp(buf, "lba")) | |
424 | translation = BIOS_ATA_TRANSLATION_LBA; | |
425 | else if (!strcmp(buf, "auto")) | |
426 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
427 | else { | |
428 | error_report("'%s' invalid translation type", buf); | |
429 | return NULL; | |
430 | } | |
431 | } | |
432 | ||
433 | if ((buf = qemu_opt_get(opts, "media")) != NULL) { | |
434 | if (!strcmp(buf, "disk")) { | |
435 | media = MEDIA_DISK; | |
436 | } else if (!strcmp(buf, "cdrom")) { | |
437 | if (cyls || secs || heads) { | |
438 | error_report("CHS can't be set with media=%s", buf); | |
439 | return NULL; | |
440 | } | |
441 | media = MEDIA_CDROM; | |
442 | } else { | |
443 | error_report("'%s' invalid media", buf); | |
444 | return NULL; | |
445 | } | |
446 | } | |
447 | ||
448 | if ((buf = qemu_opt_get(opts, "discard")) != NULL) { | |
449 | if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { | |
450 | error_report("invalid discard option"); | |
451 | return NULL; | |
452 | } | |
453 | } | |
454 | ||
455 | bdrv_flags = 0; | |
456 | if (qemu_opt_get_bool(opts, "cache.writeback", true)) { | |
457 | bdrv_flags |= BDRV_O_CACHE_WB; | |
458 | } | |
459 | if (qemu_opt_get_bool(opts, "cache.direct", false)) { | |
460 | bdrv_flags |= BDRV_O_NOCACHE; | |
461 | } | |
462 | if (qemu_opt_get_bool(opts, "cache.no-flush", true)) { | |
463 | bdrv_flags |= BDRV_O_NO_FLUSH; | |
464 | } | |
465 | ||
466 | #ifdef CONFIG_LINUX_AIO | |
467 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
468 | if (!strcmp(buf, "native")) { | |
469 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
470 | } else if (!strcmp(buf, "threads")) { | |
471 | /* this is the default */ | |
472 | } else { | |
473 | error_report("invalid aio option"); | |
474 | return NULL; | |
475 | } | |
476 | } | |
477 | #endif | |
478 | ||
479 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
480 | if (is_help_option(buf)) { | |
481 | error_printf("Supported formats:"); | |
482 | bdrv_iterate_format(bdrv_format_print, NULL); | |
483 | error_printf("\n"); | |
484 | return NULL; | |
485 | } | |
486 | ||
487 | qdict_put(bs_opts, "driver", qstring_from_str(buf)); | |
488 | } | |
489 | ||
490 | /* disk I/O throttling */ | |
491 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = | |
492 | qemu_opt_get_number(opts, "throttling.bps-total", 0); | |
493 | io_limits.bps[BLOCK_IO_LIMIT_READ] = | |
494 | qemu_opt_get_number(opts, "throttling.bps-read", 0); | |
495 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = | |
496 | qemu_opt_get_number(opts, "throttling.bps-write", 0); | |
497 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = | |
498 | qemu_opt_get_number(opts, "throttling.iops-total", 0); | |
499 | io_limits.iops[BLOCK_IO_LIMIT_READ] = | |
500 | qemu_opt_get_number(opts, "throttling.iops-read", 0); | |
501 | io_limits.iops[BLOCK_IO_LIMIT_WRITE] = | |
502 | qemu_opt_get_number(opts, "throttling.iops-write", 0); | |
503 | ||
504 | if (!do_check_io_limits(&io_limits, &error)) { | |
505 | error_report("%s", error_get_pretty(error)); | |
506 | error_free(error); | |
507 | return NULL; | |
508 | } | |
509 | ||
510 | if (qemu_opt_get(opts, "boot") != NULL) { | |
511 | fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " | |
512 | "ignored. Future versions will reject this parameter. Please " | |
513 | "update your scripts.\n"); | |
514 | } | |
515 | ||
516 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; | |
517 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
518 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { | |
519 | error_report("werror is not supported by this bus type"); | |
520 | return NULL; | |
521 | } | |
522 | ||
523 | on_write_error = parse_block_error_action(buf, 0); | |
524 | if (on_write_error < 0) { | |
525 | return NULL; | |
526 | } | |
527 | } | |
528 | ||
529 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; | |
530 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
531 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) { | |
532 | error_report("rerror is not supported by this bus type"); | |
533 | return NULL; | |
534 | } | |
535 | ||
536 | on_read_error = parse_block_error_action(buf, 1); | |
537 | if (on_read_error < 0) { | |
538 | return NULL; | |
539 | } | |
540 | } | |
541 | ||
542 | if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { | |
543 | if (type != IF_VIRTIO) { | |
544 | error_report("addr is not supported by this bus type"); | |
545 | return NULL; | |
546 | } | |
547 | } | |
548 | ||
549 | /* compute bus and unit according index */ | |
550 | ||
551 | if (index != -1) { | |
552 | if (bus_id != 0 || unit_id != -1) { | |
553 | error_report("index cannot be used with bus and unit"); | |
554 | return NULL; | |
555 | } | |
556 | bus_id = drive_index_to_bus_id(type, index); | |
557 | unit_id = drive_index_to_unit_id(type, index); | |
558 | } | |
559 | ||
560 | /* if user doesn't specify a unit_id, | |
561 | * try to find the first free | |
562 | */ | |
563 | ||
564 | if (unit_id == -1) { | |
565 | unit_id = 0; | |
566 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
567 | unit_id++; | |
568 | if (max_devs && unit_id >= max_devs) { | |
569 | unit_id -= max_devs; | |
570 | bus_id++; | |
571 | } | |
572 | } | |
573 | } | |
574 | ||
575 | /* check unit id */ | |
576 | ||
577 | if (max_devs && unit_id >= max_devs) { | |
578 | error_report("unit %d too big (max is %d)", | |
579 | unit_id, max_devs - 1); | |
580 | return NULL; | |
581 | } | |
582 | ||
583 | /* | |
584 | * catch multiple definitions | |
585 | */ | |
586 | ||
587 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
588 | error_report("drive with bus=%d, unit=%d (index=%d) exists", | |
589 | bus_id, unit_id, index); | |
590 | return NULL; | |
591 | } | |
592 | ||
593 | /* init */ | |
594 | ||
595 | dinfo = g_malloc0(sizeof(*dinfo)); | |
596 | if ((buf = qemu_opts_id(opts)) != NULL) { | |
597 | dinfo->id = g_strdup(buf); | |
598 | } else { | |
599 | /* no id supplied -> create one */ | |
600 | dinfo->id = g_malloc0(32); | |
601 | if (type == IF_IDE || type == IF_SCSI) | |
602 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
603 | if (max_devs) | |
604 | snprintf(dinfo->id, 32, "%s%i%s%i", | |
605 | if_name[type], bus_id, mediastr, unit_id); | |
606 | else | |
607 | snprintf(dinfo->id, 32, "%s%s%i", | |
608 | if_name[type], mediastr, unit_id); | |
609 | } | |
610 | dinfo->bdrv = bdrv_new(dinfo->id); | |
611 | dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; | |
612 | dinfo->bdrv->read_only = ro; | |
613 | dinfo->devaddr = devaddr; | |
614 | dinfo->type = type; | |
615 | dinfo->bus = bus_id; | |
616 | dinfo->unit = unit_id; | |
617 | dinfo->cyls = cyls; | |
618 | dinfo->heads = heads; | |
619 | dinfo->secs = secs; | |
620 | dinfo->trans = translation; | |
621 | dinfo->opts = all_opts; | |
622 | dinfo->refcount = 1; | |
623 | if (serial != NULL) { | |
624 | dinfo->serial = g_strdup(serial); | |
625 | } | |
626 | QTAILQ_INSERT_TAIL(&drives, dinfo, next); | |
627 | ||
628 | bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); | |
629 | ||
630 | /* disk I/O throttling */ | |
631 | bdrv_set_io_limits(dinfo->bdrv, &io_limits); | |
632 | ||
633 | switch(type) { | |
634 | case IF_IDE: | |
635 | case IF_SCSI: | |
636 | case IF_XEN: | |
637 | case IF_NONE: | |
638 | dinfo->media_cd = media == MEDIA_CDROM; | |
639 | break; | |
640 | case IF_SD: | |
641 | case IF_FLOPPY: | |
642 | case IF_PFLASH: | |
643 | case IF_MTD: | |
644 | break; | |
645 | case IF_VIRTIO: | |
646 | { | |
647 | /* add virtio block device */ | |
648 | QemuOpts *devopts; | |
649 | devopts = qemu_opts_create_nofail(qemu_find_opts("device")); | |
650 | if (arch_type == QEMU_ARCH_S390X) { | |
651 | qemu_opt_set(devopts, "driver", "virtio-blk-s390"); | |
652 | } else { | |
653 | qemu_opt_set(devopts, "driver", "virtio-blk-pci"); | |
654 | } | |
655 | qemu_opt_set(devopts, "drive", dinfo->id); | |
656 | if (devaddr) | |
657 | qemu_opt_set(devopts, "addr", devaddr); | |
658 | break; | |
659 | } | |
660 | default: | |
661 | abort(); | |
662 | } | |
663 | if (!file || !*file) { | |
664 | if (has_driver_specific_opts) { | |
665 | file = NULL; | |
666 | } else { | |
667 | return dinfo; | |
668 | } | |
669 | } | |
670 | if (snapshot) { | |
671 | /* always use cache=unsafe with snapshot */ | |
672 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
673 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
674 | } | |
675 | ||
676 | if (copy_on_read) { | |
677 | bdrv_flags |= BDRV_O_COPY_ON_READ; | |
678 | } | |
679 | ||
680 | if (runstate_check(RUN_STATE_INMIGRATE)) { | |
681 | bdrv_flags |= BDRV_O_INCOMING; | |
682 | } | |
683 | ||
684 | if (media == MEDIA_CDROM) { | |
685 | /* CDROM is fine for any interface, don't check. */ | |
686 | ro = 1; | |
687 | } else if (ro == 1) { | |
688 | if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && | |
689 | type != IF_NONE && type != IF_PFLASH) { | |
690 | error_report("read-only not supported by this bus type"); | |
691 | goto err; | |
692 | } | |
693 | } | |
694 | ||
695 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; | |
696 | ||
697 | if (ro && copy_on_read) { | |
698 | error_report("warning: disabling copy_on_read on read-only drive"); | |
699 | } | |
700 | ||
701 | QINCREF(bs_opts); | |
702 | ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, NULL); | |
703 | ||
704 | if (ret < 0) { | |
705 | if (ret == -EMEDIUMTYPE) { | |
706 | error_report("could not open disk image %s: not in %s format", | |
707 | file ?: dinfo->id, qdict_get_str(bs_opts, "driver")); | |
708 | } else { | |
709 | error_report("could not open disk image %s: %s", | |
710 | file ?: dinfo->id, strerror(-ret)); | |
711 | } | |
712 | goto err; | |
713 | } | |
714 | ||
715 | if (bdrv_key_required(dinfo->bdrv)) | |
716 | autostart = 0; | |
717 | ||
718 | QDECREF(bs_opts); | |
719 | qemu_opts_del(opts); | |
720 | ||
721 | return dinfo; | |
722 | ||
723 | err: | |
724 | qemu_opts_del(opts); | |
725 | QDECREF(bs_opts); | |
726 | bdrv_delete(dinfo->bdrv); | |
727 | g_free(dinfo->id); | |
728 | QTAILQ_REMOVE(&drives, dinfo, next); | |
729 | g_free(dinfo); | |
730 | return NULL; | |
731 | } | |
732 | ||
733 | static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to) | |
734 | { | |
735 | const char *value; | |
736 | ||
737 | value = qemu_opt_get(opts, from); | |
738 | if (value) { | |
739 | qemu_opt_set(opts, to, value); | |
740 | qemu_opt_unset(opts, from); | |
741 | } | |
742 | } | |
743 | ||
744 | DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) | |
745 | { | |
746 | const char *value; | |
747 | ||
748 | /* Change legacy command line options into QMP ones */ | |
749 | qemu_opt_rename(all_opts, "iops", "throttling.iops-total"); | |
750 | qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read"); | |
751 | qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write"); | |
752 | ||
753 | qemu_opt_rename(all_opts, "bps", "throttling.bps-total"); | |
754 | qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read"); | |
755 | qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write"); | |
756 | ||
757 | qemu_opt_rename(all_opts, "readonly", "read-only"); | |
758 | ||
759 | value = qemu_opt_get(all_opts, "cache"); | |
760 | if (value) { | |
761 | int flags = 0; | |
762 | ||
763 | if (bdrv_parse_cache_flags(value, &flags) != 0) { | |
764 | error_report("invalid cache option"); | |
765 | return NULL; | |
766 | } | |
767 | ||
768 | /* Specific options take precedence */ | |
769 | if (!qemu_opt_get(all_opts, "cache.writeback")) { | |
770 | qemu_opt_set_bool(all_opts, "cache.writeback", | |
771 | !!(flags & BDRV_O_CACHE_WB)); | |
772 | } | |
773 | if (!qemu_opt_get(all_opts, "cache.direct")) { | |
774 | qemu_opt_set_bool(all_opts, "cache.direct", | |
775 | !!(flags & BDRV_O_NOCACHE)); | |
776 | } | |
777 | if (!qemu_opt_get(all_opts, "cache.no-flush")) { | |
778 | qemu_opt_set_bool(all_opts, "cache.no-flush", | |
779 | !!(flags & BDRV_O_NO_FLUSH)); | |
780 | } | |
781 | qemu_opt_unset(all_opts, "cache"); | |
782 | } | |
783 | ||
784 | return blockdev_init(all_opts, block_default_type); | |
785 | } | |
786 | ||
787 | void do_commit(Monitor *mon, const QDict *qdict) | |
788 | { | |
789 | const char *device = qdict_get_str(qdict, "device"); | |
790 | BlockDriverState *bs; | |
791 | int ret; | |
792 | ||
793 | if (!strcmp(device, "all")) { | |
794 | ret = bdrv_commit_all(); | |
795 | } else { | |
796 | bs = bdrv_find(device); | |
797 | if (!bs) { | |
798 | monitor_printf(mon, "Device '%s' not found\n", device); | |
799 | return; | |
800 | } | |
801 | ret = bdrv_commit(bs); | |
802 | } | |
803 | if (ret < 0) { | |
804 | monitor_printf(mon, "'commit' error for '%s': %s\n", device, | |
805 | strerror(-ret)); | |
806 | } | |
807 | } | |
808 | ||
809 | static void blockdev_do_action(int kind, void *data, Error **errp) | |
810 | { | |
811 | TransactionAction action; | |
812 | TransactionActionList list; | |
813 | ||
814 | action.kind = kind; | |
815 | action.data = data; | |
816 | list.value = &action; | |
817 | list.next = NULL; | |
818 | qmp_transaction(&list, errp); | |
819 | } | |
820 | ||
821 | void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, | |
822 | bool has_format, const char *format, | |
823 | bool has_mode, enum NewImageMode mode, | |
824 | Error **errp) | |
825 | { | |
826 | BlockdevSnapshot snapshot = { | |
827 | .device = (char *) device, | |
828 | .snapshot_file = (char *) snapshot_file, | |
829 | .has_format = has_format, | |
830 | .format = (char *) format, | |
831 | .has_mode = has_mode, | |
832 | .mode = mode, | |
833 | }; | |
834 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, | |
835 | &snapshot, errp); | |
836 | } | |
837 | ||
838 | ||
839 | /* New and old BlockDriverState structs for group snapshots */ | |
840 | ||
841 | typedef struct BlkTransactionState BlkTransactionState; | |
842 | ||
843 | /* Only prepare() may fail. In a single transaction, only one of commit() or | |
844 | abort() will be called, clean() will always be called if it present. */ | |
845 | typedef struct BdrvActionOps { | |
846 | /* Size of state struct, in bytes. */ | |
847 | size_t instance_size; | |
848 | /* Prepare the work, must NOT be NULL. */ | |
849 | void (*prepare)(BlkTransactionState *common, Error **errp); | |
850 | /* Commit the changes, can be NULL. */ | |
851 | void (*commit)(BlkTransactionState *common); | |
852 | /* Abort the changes on fail, can be NULL. */ | |
853 | void (*abort)(BlkTransactionState *common); | |
854 | /* Clean up resource in the end, can be NULL. */ | |
855 | void (*clean)(BlkTransactionState *common); | |
856 | } BdrvActionOps; | |
857 | ||
858 | /* | |
859 | * This structure must be arranged as first member in child type, assuming | |
860 | * that compiler will also arrange it to the same address with parent instance. | |
861 | * Later it will be used in free(). | |
862 | */ | |
863 | struct BlkTransactionState { | |
864 | TransactionAction *action; | |
865 | const BdrvActionOps *ops; | |
866 | QSIMPLEQ_ENTRY(BlkTransactionState) entry; | |
867 | }; | |
868 | ||
869 | /* external snapshot private data */ | |
870 | typedef struct ExternalSnapshotState { | |
871 | BlkTransactionState common; | |
872 | BlockDriverState *old_bs; | |
873 | BlockDriverState *new_bs; | |
874 | } ExternalSnapshotState; | |
875 | ||
876 | static void external_snapshot_prepare(BlkTransactionState *common, | |
877 | Error **errp) | |
878 | { | |
879 | BlockDriver *drv; | |
880 | int flags, ret; | |
881 | Error *local_err = NULL; | |
882 | const char *device; | |
883 | const char *new_image_file; | |
884 | const char *format = "qcow2"; | |
885 | enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
886 | ExternalSnapshotState *state = | |
887 | DO_UPCAST(ExternalSnapshotState, common, common); | |
888 | TransactionAction *action = common->action; | |
889 | ||
890 | /* get parameters */ | |
891 | g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); | |
892 | ||
893 | device = action->blockdev_snapshot_sync->device; | |
894 | new_image_file = action->blockdev_snapshot_sync->snapshot_file; | |
895 | if (action->blockdev_snapshot_sync->has_format) { | |
896 | format = action->blockdev_snapshot_sync->format; | |
897 | } | |
898 | if (action->blockdev_snapshot_sync->has_mode) { | |
899 | mode = action->blockdev_snapshot_sync->mode; | |
900 | } | |
901 | ||
902 | /* start processing */ | |
903 | drv = bdrv_find_format(format); | |
904 | if (!drv) { | |
905 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
906 | return; | |
907 | } | |
908 | ||
909 | state->old_bs = bdrv_find(device); | |
910 | if (!state->old_bs) { | |
911 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
912 | return; | |
913 | } | |
914 | ||
915 | if (!bdrv_is_inserted(state->old_bs)) { | |
916 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
917 | return; | |
918 | } | |
919 | ||
920 | if (bdrv_in_use(state->old_bs)) { | |
921 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
922 | return; | |
923 | } | |
924 | ||
925 | if (!bdrv_is_read_only(state->old_bs)) { | |
926 | if (bdrv_flush(state->old_bs)) { | |
927 | error_set(errp, QERR_IO_ERROR); | |
928 | return; | |
929 | } | |
930 | } | |
931 | ||
932 | flags = state->old_bs->open_flags; | |
933 | ||
934 | /* create new image w/backing file */ | |
935 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
936 | bdrv_img_create(new_image_file, format, | |
937 | state->old_bs->filename, | |
938 | state->old_bs->drv->format_name, | |
939 | NULL, -1, flags, &local_err, false); | |
940 | if (error_is_set(&local_err)) { | |
941 | error_propagate(errp, local_err); | |
942 | return; | |
943 | } | |
944 | } | |
945 | ||
946 | /* We will manually add the backing_hd field to the bs later */ | |
947 | state->new_bs = bdrv_new(""); | |
948 | /* TODO Inherit bs->options or only take explicit options with an | |
949 | * extended QMP command? */ | |
950 | ret = bdrv_open(state->new_bs, new_image_file, NULL, | |
951 | flags | BDRV_O_NO_BACKING, drv); | |
952 | if (ret != 0) { | |
953 | error_setg_file_open(errp, -ret, new_image_file); | |
954 | } | |
955 | } | |
956 | ||
957 | static void external_snapshot_commit(BlkTransactionState *common) | |
958 | { | |
959 | ExternalSnapshotState *state = | |
960 | DO_UPCAST(ExternalSnapshotState, common, common); | |
961 | ||
962 | /* This removes our old bs and adds the new bs */ | |
963 | bdrv_append(state->new_bs, state->old_bs); | |
964 | /* We don't need (or want) to use the transactional | |
965 | * bdrv_reopen_multiple() across all the entries at once, because we | |
966 | * don't want to abort all of them if one of them fails the reopen */ | |
967 | bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, | |
968 | NULL); | |
969 | } | |
970 | ||
971 | static void external_snapshot_abort(BlkTransactionState *common) | |
972 | { | |
973 | ExternalSnapshotState *state = | |
974 | DO_UPCAST(ExternalSnapshotState, common, common); | |
975 | if (state->new_bs) { | |
976 | bdrv_delete(state->new_bs); | |
977 | } | |
978 | } | |
979 | ||
980 | typedef struct DriveBackupState { | |
981 | BlkTransactionState common; | |
982 | BlockDriverState *bs; | |
983 | BlockJob *job; | |
984 | } DriveBackupState; | |
985 | ||
986 | static void drive_backup_prepare(BlkTransactionState *common, Error **errp) | |
987 | { | |
988 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
989 | DriveBackup *backup; | |
990 | Error *local_err = NULL; | |
991 | ||
992 | assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); | |
993 | backup = common->action->drive_backup; | |
994 | ||
995 | qmp_drive_backup(backup->device, backup->target, | |
996 | backup->has_format, backup->format, | |
997 | backup->sync, | |
998 | backup->has_mode, backup->mode, | |
999 | backup->has_speed, backup->speed, | |
1000 | backup->has_on_source_error, backup->on_source_error, | |
1001 | backup->has_on_target_error, backup->on_target_error, | |
1002 | &local_err); | |
1003 | if (error_is_set(&local_err)) { | |
1004 | error_propagate(errp, local_err); | |
1005 | state->bs = NULL; | |
1006 | state->job = NULL; | |
1007 | return; | |
1008 | } | |
1009 | ||
1010 | state->bs = bdrv_find(backup->device); | |
1011 | state->job = state->bs->job; | |
1012 | } | |
1013 | ||
1014 | static void drive_backup_abort(BlkTransactionState *common) | |
1015 | { | |
1016 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1017 | BlockDriverState *bs = state->bs; | |
1018 | ||
1019 | /* Only cancel if it's the job we started */ | |
1020 | if (bs && bs->job && bs->job == state->job) { | |
1021 | block_job_cancel_sync(bs->job); | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | static void abort_prepare(BlkTransactionState *common, Error **errp) | |
1026 | { | |
1027 | error_setg(errp, "Transaction aborted using Abort action"); | |
1028 | } | |
1029 | ||
1030 | static void abort_commit(BlkTransactionState *common) | |
1031 | { | |
1032 | g_assert_not_reached(); /* this action never succeeds */ | |
1033 | } | |
1034 | ||
1035 | static const BdrvActionOps actions[] = { | |
1036 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { | |
1037 | .instance_size = sizeof(ExternalSnapshotState), | |
1038 | .prepare = external_snapshot_prepare, | |
1039 | .commit = external_snapshot_commit, | |
1040 | .abort = external_snapshot_abort, | |
1041 | }, | |
1042 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { | |
1043 | .instance_size = sizeof(DriveBackupState), | |
1044 | .prepare = drive_backup_prepare, | |
1045 | .abort = drive_backup_abort, | |
1046 | }, | |
1047 | [TRANSACTION_ACTION_KIND_ABORT] = { | |
1048 | .instance_size = sizeof(BlkTransactionState), | |
1049 | .prepare = abort_prepare, | |
1050 | .commit = abort_commit, | |
1051 | }, | |
1052 | }; | |
1053 | ||
1054 | /* | |
1055 | * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail | |
1056 | * then we do not pivot any of the devices in the group, and abandon the | |
1057 | * snapshots | |
1058 | */ | |
1059 | void qmp_transaction(TransactionActionList *dev_list, Error **errp) | |
1060 | { | |
1061 | TransactionActionList *dev_entry = dev_list; | |
1062 | BlkTransactionState *state, *next; | |
1063 | Error *local_err = NULL; | |
1064 | ||
1065 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; | |
1066 | QSIMPLEQ_INIT(&snap_bdrv_states); | |
1067 | ||
1068 | /* drain all i/o before any snapshots */ | |
1069 | bdrv_drain_all(); | |
1070 | ||
1071 | /* We don't do anything in this loop that commits us to the snapshot */ | |
1072 | while (NULL != dev_entry) { | |
1073 | TransactionAction *dev_info = NULL; | |
1074 | const BdrvActionOps *ops; | |
1075 | ||
1076 | dev_info = dev_entry->value; | |
1077 | dev_entry = dev_entry->next; | |
1078 | ||
1079 | assert(dev_info->kind < ARRAY_SIZE(actions)); | |
1080 | ||
1081 | ops = &actions[dev_info->kind]; | |
1082 | state = g_malloc0(ops->instance_size); | |
1083 | state->ops = ops; | |
1084 | state->action = dev_info; | |
1085 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); | |
1086 | ||
1087 | state->ops->prepare(state, &local_err); | |
1088 | if (error_is_set(&local_err)) { | |
1089 | error_propagate(errp, local_err); | |
1090 | goto delete_and_fail; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { | |
1095 | if (state->ops->commit) { | |
1096 | state->ops->commit(state); | |
1097 | } | |
1098 | } | |
1099 | ||
1100 | /* success */ | |
1101 | goto exit; | |
1102 | ||
1103 | delete_and_fail: | |
1104 | /* | |
1105 | * failure, and it is all-or-none; abandon each new bs, and keep using | |
1106 | * the original bs for all images | |
1107 | */ | |
1108 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { | |
1109 | if (state->ops->abort) { | |
1110 | state->ops->abort(state); | |
1111 | } | |
1112 | } | |
1113 | exit: | |
1114 | QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { | |
1115 | if (state->ops->clean) { | |
1116 | state->ops->clean(state); | |
1117 | } | |
1118 | g_free(state); | |
1119 | } | |
1120 | } | |
1121 | ||
1122 | ||
1123 | static void eject_device(BlockDriverState *bs, int force, Error **errp) | |
1124 | { | |
1125 | if (bdrv_in_use(bs)) { | |
1126 | error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); | |
1127 | return; | |
1128 | } | |
1129 | if (!bdrv_dev_has_removable_media(bs)) { | |
1130 | error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); | |
1131 | return; | |
1132 | } | |
1133 | ||
1134 | if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { | |
1135 | bdrv_dev_eject_request(bs, force); | |
1136 | if (!force) { | |
1137 | error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); | |
1138 | return; | |
1139 | } | |
1140 | } | |
1141 | ||
1142 | bdrv_close(bs); | |
1143 | } | |
1144 | ||
1145 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) | |
1146 | { | |
1147 | BlockDriverState *bs; | |
1148 | ||
1149 | bs = bdrv_find(device); | |
1150 | if (!bs) { | |
1151 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1152 | return; | |
1153 | } | |
1154 | ||
1155 | eject_device(bs, force, errp); | |
1156 | } | |
1157 | ||
1158 | void qmp_block_passwd(const char *device, const char *password, Error **errp) | |
1159 | { | |
1160 | BlockDriverState *bs; | |
1161 | int err; | |
1162 | ||
1163 | bs = bdrv_find(device); | |
1164 | if (!bs) { | |
1165 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1166 | return; | |
1167 | } | |
1168 | ||
1169 | err = bdrv_set_key(bs, password); | |
1170 | if (err == -EINVAL) { | |
1171 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
1172 | return; | |
1173 | } else if (err < 0) { | |
1174 | error_set(errp, QERR_INVALID_PASSWORD); | |
1175 | return; | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, | |
1180 | int bdrv_flags, BlockDriver *drv, | |
1181 | const char *password, Error **errp) | |
1182 | { | |
1183 | int ret; | |
1184 | ||
1185 | ret = bdrv_open(bs, filename, NULL, bdrv_flags, drv); | |
1186 | if (ret < 0) { | |
1187 | error_setg_file_open(errp, -ret, filename); | |
1188 | return; | |
1189 | } | |
1190 | ||
1191 | if (bdrv_key_required(bs)) { | |
1192 | if (password) { | |
1193 | if (bdrv_set_key(bs, password) < 0) { | |
1194 | error_set(errp, QERR_INVALID_PASSWORD); | |
1195 | } | |
1196 | } else { | |
1197 | error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), | |
1198 | bdrv_get_encrypted_filename(bs)); | |
1199 | } | |
1200 | } else if (password) { | |
1201 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
1202 | } | |
1203 | } | |
1204 | ||
1205 | void qmp_change_blockdev(const char *device, const char *filename, | |
1206 | bool has_format, const char *format, Error **errp) | |
1207 | { | |
1208 | BlockDriverState *bs; | |
1209 | BlockDriver *drv = NULL; | |
1210 | int bdrv_flags; | |
1211 | Error *err = NULL; | |
1212 | ||
1213 | bs = bdrv_find(device); | |
1214 | if (!bs) { | |
1215 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1216 | return; | |
1217 | } | |
1218 | ||
1219 | if (format) { | |
1220 | drv = bdrv_find_whitelisted_format(format, bs->read_only); | |
1221 | if (!drv) { | |
1222 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
1223 | return; | |
1224 | } | |
1225 | } | |
1226 | ||
1227 | eject_device(bs, 0, &err); | |
1228 | if (error_is_set(&err)) { | |
1229 | error_propagate(errp, err); | |
1230 | return; | |
1231 | } | |
1232 | ||
1233 | bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; | |
1234 | bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; | |
1235 | ||
1236 | qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); | |
1237 | } | |
1238 | ||
1239 | /* throttling disk I/O limits */ | |
1240 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, | |
1241 | int64_t bps_wr, int64_t iops, int64_t iops_rd, | |
1242 | int64_t iops_wr, Error **errp) | |
1243 | { | |
1244 | BlockIOLimit io_limits; | |
1245 | BlockDriverState *bs; | |
1246 | ||
1247 | bs = bdrv_find(device); | |
1248 | if (!bs) { | |
1249 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1250 | return; | |
1251 | } | |
1252 | ||
1253 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; | |
1254 | io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; | |
1255 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; | |
1256 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; | |
1257 | io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; | |
1258 | io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; | |
1259 | ||
1260 | if (!do_check_io_limits(&io_limits, errp)) { | |
1261 | return; | |
1262 | } | |
1263 | ||
1264 | bs->io_limits = io_limits; | |
1265 | ||
1266 | if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { | |
1267 | bdrv_io_limits_enable(bs); | |
1268 | } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { | |
1269 | bdrv_io_limits_disable(bs); | |
1270 | } else { | |
1271 | if (bs->block_timer) { | |
1272 | qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); | |
1273 | } | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) | |
1278 | { | |
1279 | const char *id = qdict_get_str(qdict, "id"); | |
1280 | BlockDriverState *bs; | |
1281 | ||
1282 | bs = bdrv_find(id); | |
1283 | if (!bs) { | |
1284 | qerror_report(QERR_DEVICE_NOT_FOUND, id); | |
1285 | return -1; | |
1286 | } | |
1287 | if (bdrv_in_use(bs)) { | |
1288 | qerror_report(QERR_DEVICE_IN_USE, id); | |
1289 | return -1; | |
1290 | } | |
1291 | ||
1292 | /* quiesce block driver; prevent further io */ | |
1293 | bdrv_drain_all(); | |
1294 | bdrv_flush(bs); | |
1295 | bdrv_close(bs); | |
1296 | ||
1297 | /* if we have a device attached to this BlockDriverState | |
1298 | * then we need to make the drive anonymous until the device | |
1299 | * can be removed. If this is a drive with no device backing | |
1300 | * then we can just get rid of the block driver state right here. | |
1301 | */ | |
1302 | if (bdrv_get_attached_dev(bs)) { | |
1303 | bdrv_make_anon(bs); | |
1304 | ||
1305 | /* Further I/O must not pause the guest */ | |
1306 | bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, | |
1307 | BLOCKDEV_ON_ERROR_REPORT); | |
1308 | } else { | |
1309 | drive_uninit(drive_get_by_blockdev(bs)); | |
1310 | } | |
1311 | ||
1312 | return 0; | |
1313 | } | |
1314 | ||
1315 | void qmp_block_resize(const char *device, int64_t size, Error **errp) | |
1316 | { | |
1317 | BlockDriverState *bs; | |
1318 | int ret; | |
1319 | ||
1320 | bs = bdrv_find(device); | |
1321 | if (!bs) { | |
1322 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1323 | return; | |
1324 | } | |
1325 | ||
1326 | if (size < 0) { | |
1327 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); | |
1328 | return; | |
1329 | } | |
1330 | ||
1331 | /* complete all in-flight operations before resizing the device */ | |
1332 | bdrv_drain_all(); | |
1333 | ||
1334 | ret = bdrv_truncate(bs, size); | |
1335 | switch (ret) { | |
1336 | case 0: | |
1337 | break; | |
1338 | case -ENOMEDIUM: | |
1339 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1340 | break; | |
1341 | case -ENOTSUP: | |
1342 | error_set(errp, QERR_UNSUPPORTED); | |
1343 | break; | |
1344 | case -EACCES: | |
1345 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1346 | break; | |
1347 | case -EBUSY: | |
1348 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1349 | break; | |
1350 | default: | |
1351 | error_setg_errno(errp, -ret, "Could not resize"); | |
1352 | break; | |
1353 | } | |
1354 | } | |
1355 | ||
1356 | static void block_job_cb(void *opaque, int ret) | |
1357 | { | |
1358 | BlockDriverState *bs = opaque; | |
1359 | QObject *obj; | |
1360 | ||
1361 | trace_block_job_cb(bs, bs->job, ret); | |
1362 | ||
1363 | assert(bs->job); | |
1364 | obj = qobject_from_block_job(bs->job); | |
1365 | if (ret < 0) { | |
1366 | QDict *dict = qobject_to_qdict(obj); | |
1367 | qdict_put(dict, "error", qstring_from_str(strerror(-ret))); | |
1368 | } | |
1369 | ||
1370 | if (block_job_is_cancelled(bs->job)) { | |
1371 | monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); | |
1372 | } else { | |
1373 | monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); | |
1374 | } | |
1375 | qobject_decref(obj); | |
1376 | ||
1377 | drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); | |
1378 | } | |
1379 | ||
1380 | void qmp_block_stream(const char *device, bool has_base, | |
1381 | const char *base, bool has_speed, int64_t speed, | |
1382 | bool has_on_error, BlockdevOnError on_error, | |
1383 | Error **errp) | |
1384 | { | |
1385 | BlockDriverState *bs; | |
1386 | BlockDriverState *base_bs = NULL; | |
1387 | Error *local_err = NULL; | |
1388 | ||
1389 | if (!has_on_error) { | |
1390 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
1391 | } | |
1392 | ||
1393 | bs = bdrv_find(device); | |
1394 | if (!bs) { | |
1395 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1396 | return; | |
1397 | } | |
1398 | ||
1399 | if (base) { | |
1400 | base_bs = bdrv_find_backing_image(bs, base); | |
1401 | if (base_bs == NULL) { | |
1402 | error_set(errp, QERR_BASE_NOT_FOUND, base); | |
1403 | return; | |
1404 | } | |
1405 | } | |
1406 | ||
1407 | stream_start(bs, base_bs, base, has_speed ? speed : 0, | |
1408 | on_error, block_job_cb, bs, &local_err); | |
1409 | if (error_is_set(&local_err)) { | |
1410 | error_propagate(errp, local_err); | |
1411 | return; | |
1412 | } | |
1413 | ||
1414 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1415 | * underneath us. | |
1416 | */ | |
1417 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1418 | ||
1419 | trace_qmp_block_stream(bs, bs->job); | |
1420 | } | |
1421 | ||
1422 | void qmp_block_commit(const char *device, | |
1423 | bool has_base, const char *base, const char *top, | |
1424 | bool has_speed, int64_t speed, | |
1425 | Error **errp) | |
1426 | { | |
1427 | BlockDriverState *bs; | |
1428 | BlockDriverState *base_bs, *top_bs; | |
1429 | Error *local_err = NULL; | |
1430 | /* This will be part of the QMP command, if/when the | |
1431 | * BlockdevOnError change for blkmirror makes it in | |
1432 | */ | |
1433 | BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; | |
1434 | ||
1435 | /* drain all i/o before commits */ | |
1436 | bdrv_drain_all(); | |
1437 | ||
1438 | bs = bdrv_find(device); | |
1439 | if (!bs) { | |
1440 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1441 | return; | |
1442 | } | |
1443 | ||
1444 | /* default top_bs is the active layer */ | |
1445 | top_bs = bs; | |
1446 | ||
1447 | if (top) { | |
1448 | if (strcmp(bs->filename, top) != 0) { | |
1449 | top_bs = bdrv_find_backing_image(bs, top); | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | if (top_bs == NULL) { | |
1454 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
1455 | return; | |
1456 | } | |
1457 | ||
1458 | if (has_base && base) { | |
1459 | base_bs = bdrv_find_backing_image(top_bs, base); | |
1460 | } else { | |
1461 | base_bs = bdrv_find_base(top_bs); | |
1462 | } | |
1463 | ||
1464 | if (base_bs == NULL) { | |
1465 | error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); | |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, | |
1470 | &local_err); | |
1471 | if (local_err != NULL) { | |
1472 | error_propagate(errp, local_err); | |
1473 | return; | |
1474 | } | |
1475 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1476 | * underneath us. | |
1477 | */ | |
1478 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1479 | } | |
1480 | ||
1481 | void qmp_drive_backup(const char *device, const char *target, | |
1482 | bool has_format, const char *format, | |
1483 | enum MirrorSyncMode sync, | |
1484 | bool has_mode, enum NewImageMode mode, | |
1485 | bool has_speed, int64_t speed, | |
1486 | bool has_on_source_error, BlockdevOnError on_source_error, | |
1487 | bool has_on_target_error, BlockdevOnError on_target_error, | |
1488 | Error **errp) | |
1489 | { | |
1490 | BlockDriverState *bs; | |
1491 | BlockDriverState *target_bs; | |
1492 | BlockDriverState *source = NULL; | |
1493 | BlockDriver *drv = NULL; | |
1494 | Error *local_err = NULL; | |
1495 | int flags; | |
1496 | int64_t size; | |
1497 | int ret; | |
1498 | ||
1499 | if (!has_speed) { | |
1500 | speed = 0; | |
1501 | } | |
1502 | if (!has_on_source_error) { | |
1503 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
1504 | } | |
1505 | if (!has_on_target_error) { | |
1506 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
1507 | } | |
1508 | if (!has_mode) { | |
1509 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1510 | } | |
1511 | ||
1512 | bs = bdrv_find(device); | |
1513 | if (!bs) { | |
1514 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1515 | return; | |
1516 | } | |
1517 | ||
1518 | if (!bdrv_is_inserted(bs)) { | |
1519 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1520 | return; | |
1521 | } | |
1522 | ||
1523 | if (!has_format) { | |
1524 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
1525 | } | |
1526 | if (format) { | |
1527 | drv = bdrv_find_format(format); | |
1528 | if (!drv) { | |
1529 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
1530 | return; | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | if (bdrv_in_use(bs)) { | |
1535 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1536 | return; | |
1537 | } | |
1538 | ||
1539 | flags = bs->open_flags | BDRV_O_RDWR; | |
1540 | ||
1541 | /* See if we have a backing HD we can use to create our new image | |
1542 | * on top of. */ | |
1543 | if (sync == MIRROR_SYNC_MODE_TOP) { | |
1544 | source = bs->backing_hd; | |
1545 | if (!source) { | |
1546 | sync = MIRROR_SYNC_MODE_FULL; | |
1547 | } | |
1548 | } | |
1549 | if (sync == MIRROR_SYNC_MODE_NONE) { | |
1550 | source = bs; | |
1551 | } | |
1552 | ||
1553 | size = bdrv_getlength(bs); | |
1554 | if (size < 0) { | |
1555 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1556 | return; | |
1557 | } | |
1558 | ||
1559 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
1560 | assert(format && drv); | |
1561 | if (source) { | |
1562 | bdrv_img_create(target, format, source->filename, | |
1563 | source->drv->format_name, NULL, | |
1564 | size, flags, &local_err, false); | |
1565 | } else { | |
1566 | bdrv_img_create(target, format, NULL, NULL, NULL, | |
1567 | size, flags, &local_err, false); | |
1568 | } | |
1569 | } | |
1570 | ||
1571 | if (error_is_set(&local_err)) { | |
1572 | error_propagate(errp, local_err); | |
1573 | return; | |
1574 | } | |
1575 | ||
1576 | target_bs = bdrv_new(""); | |
1577 | ret = bdrv_open(target_bs, target, NULL, flags, drv); | |
1578 | if (ret < 0) { | |
1579 | bdrv_delete(target_bs); | |
1580 | error_setg_file_open(errp, -ret, target); | |
1581 | return; | |
1582 | } | |
1583 | ||
1584 | backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error, | |
1585 | block_job_cb, bs, &local_err); | |
1586 | if (local_err != NULL) { | |
1587 | bdrv_delete(target_bs); | |
1588 | error_propagate(errp, local_err); | |
1589 | return; | |
1590 | } | |
1591 | ||
1592 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1593 | * underneath us. | |
1594 | */ | |
1595 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1596 | } | |
1597 | ||
1598 | #define DEFAULT_MIRROR_BUF_SIZE (10 << 20) | |
1599 | ||
1600 | void qmp_drive_mirror(const char *device, const char *target, | |
1601 | bool has_format, const char *format, | |
1602 | enum MirrorSyncMode sync, | |
1603 | bool has_mode, enum NewImageMode mode, | |
1604 | bool has_speed, int64_t speed, | |
1605 | bool has_granularity, uint32_t granularity, | |
1606 | bool has_buf_size, int64_t buf_size, | |
1607 | bool has_on_source_error, BlockdevOnError on_source_error, | |
1608 | bool has_on_target_error, BlockdevOnError on_target_error, | |
1609 | Error **errp) | |
1610 | { | |
1611 | BlockDriverState *bs; | |
1612 | BlockDriverState *source, *target_bs; | |
1613 | BlockDriver *drv = NULL; | |
1614 | Error *local_err = NULL; | |
1615 | int flags; | |
1616 | int64_t size; | |
1617 | int ret; | |
1618 | ||
1619 | if (!has_speed) { | |
1620 | speed = 0; | |
1621 | } | |
1622 | if (!has_on_source_error) { | |
1623 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
1624 | } | |
1625 | if (!has_on_target_error) { | |
1626 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
1627 | } | |
1628 | if (!has_mode) { | |
1629 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1630 | } | |
1631 | if (!has_granularity) { | |
1632 | granularity = 0; | |
1633 | } | |
1634 | if (!has_buf_size) { | |
1635 | buf_size = DEFAULT_MIRROR_BUF_SIZE; | |
1636 | } | |
1637 | ||
1638 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { | |
1639 | error_set(errp, QERR_INVALID_PARAMETER, device); | |
1640 | return; | |
1641 | } | |
1642 | if (granularity & (granularity - 1)) { | |
1643 | error_set(errp, QERR_INVALID_PARAMETER, device); | |
1644 | return; | |
1645 | } | |
1646 | ||
1647 | bs = bdrv_find(device); | |
1648 | if (!bs) { | |
1649 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1650 | return; | |
1651 | } | |
1652 | ||
1653 | if (!bdrv_is_inserted(bs)) { | |
1654 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1655 | return; | |
1656 | } | |
1657 | ||
1658 | if (!has_format) { | |
1659 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
1660 | } | |
1661 | if (format) { | |
1662 | drv = bdrv_find_format(format); | |
1663 | if (!drv) { | |
1664 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
1665 | return; | |
1666 | } | |
1667 | } | |
1668 | ||
1669 | if (bdrv_in_use(bs)) { | |
1670 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1671 | return; | |
1672 | } | |
1673 | ||
1674 | flags = bs->open_flags | BDRV_O_RDWR; | |
1675 | source = bs->backing_hd; | |
1676 | if (!source && sync == MIRROR_SYNC_MODE_TOP) { | |
1677 | sync = MIRROR_SYNC_MODE_FULL; | |
1678 | } | |
1679 | ||
1680 | size = bdrv_getlength(bs); | |
1681 | if (size < 0) { | |
1682 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1683 | return; | |
1684 | } | |
1685 | ||
1686 | if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) { | |
1687 | /* create new image w/o backing file */ | |
1688 | assert(format && drv); | |
1689 | bdrv_img_create(target, format, | |
1690 | NULL, NULL, NULL, size, flags, &local_err, false); | |
1691 | } else { | |
1692 | switch (mode) { | |
1693 | case NEW_IMAGE_MODE_EXISTING: | |
1694 | ret = 0; | |
1695 | break; | |
1696 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
1697 | /* create new image with backing file */ | |
1698 | bdrv_img_create(target, format, | |
1699 | source->filename, | |
1700 | source->drv->format_name, | |
1701 | NULL, size, flags, &local_err, false); | |
1702 | break; | |
1703 | default: | |
1704 | abort(); | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | if (error_is_set(&local_err)) { | |
1709 | error_propagate(errp, local_err); | |
1710 | return; | |
1711 | } | |
1712 | ||
1713 | /* Mirroring takes care of copy-on-write using the source's backing | |
1714 | * file. | |
1715 | */ | |
1716 | target_bs = bdrv_new(""); | |
1717 | ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv); | |
1718 | if (ret < 0) { | |
1719 | bdrv_delete(target_bs); | |
1720 | error_setg_file_open(errp, -ret, target); | |
1721 | return; | |
1722 | } | |
1723 | ||
1724 | mirror_start(bs, target_bs, speed, granularity, buf_size, sync, | |
1725 | on_source_error, on_target_error, | |
1726 | block_job_cb, bs, &local_err); | |
1727 | if (local_err != NULL) { | |
1728 | bdrv_delete(target_bs); | |
1729 | error_propagate(errp, local_err); | |
1730 | return; | |
1731 | } | |
1732 | ||
1733 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1734 | * underneath us. | |
1735 | */ | |
1736 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1737 | } | |
1738 | ||
1739 | static BlockJob *find_block_job(const char *device) | |
1740 | { | |
1741 | BlockDriverState *bs; | |
1742 | ||
1743 | bs = bdrv_find(device); | |
1744 | if (!bs || !bs->job) { | |
1745 | return NULL; | |
1746 | } | |
1747 | return bs->job; | |
1748 | } | |
1749 | ||
1750 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) | |
1751 | { | |
1752 | BlockJob *job = find_block_job(device); | |
1753 | ||
1754 | if (!job) { | |
1755 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1756 | return; | |
1757 | } | |
1758 | ||
1759 | block_job_set_speed(job, speed, errp); | |
1760 | } | |
1761 | ||
1762 | void qmp_block_job_cancel(const char *device, | |
1763 | bool has_force, bool force, Error **errp) | |
1764 | { | |
1765 | BlockJob *job = find_block_job(device); | |
1766 | ||
1767 | if (!has_force) { | |
1768 | force = false; | |
1769 | } | |
1770 | ||
1771 | if (!job) { | |
1772 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1773 | return; | |
1774 | } | |
1775 | if (job->paused && !force) { | |
1776 | error_set(errp, QERR_BLOCK_JOB_PAUSED, device); | |
1777 | return; | |
1778 | } | |
1779 | ||
1780 | trace_qmp_block_job_cancel(job); | |
1781 | block_job_cancel(job); | |
1782 | } | |
1783 | ||
1784 | void qmp_block_job_pause(const char *device, Error **errp) | |
1785 | { | |
1786 | BlockJob *job = find_block_job(device); | |
1787 | ||
1788 | if (!job) { | |
1789 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1790 | return; | |
1791 | } | |
1792 | ||
1793 | trace_qmp_block_job_pause(job); | |
1794 | block_job_pause(job); | |
1795 | } | |
1796 | ||
1797 | void qmp_block_job_resume(const char *device, Error **errp) | |
1798 | { | |
1799 | BlockJob *job = find_block_job(device); | |
1800 | ||
1801 | if (!job) { | |
1802 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1803 | return; | |
1804 | } | |
1805 | ||
1806 | trace_qmp_block_job_resume(job); | |
1807 | block_job_resume(job); | |
1808 | } | |
1809 | ||
1810 | void qmp_block_job_complete(const char *device, Error **errp) | |
1811 | { | |
1812 | BlockJob *job = find_block_job(device); | |
1813 | ||
1814 | if (!job) { | |
1815 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1816 | return; | |
1817 | } | |
1818 | ||
1819 | trace_qmp_block_job_complete(job); | |
1820 | block_job_complete(job, errp); | |
1821 | } | |
1822 | ||
1823 | static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) | |
1824 | { | |
1825 | BlockJobInfoList **prev = opaque; | |
1826 | BlockJob *job = bs->job; | |
1827 | ||
1828 | if (job) { | |
1829 | BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); | |
1830 | elem->value = block_job_query(bs->job); | |
1831 | (*prev)->next = elem; | |
1832 | *prev = elem; | |
1833 | } | |
1834 | } | |
1835 | ||
1836 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
1837 | { | |
1838 | /* Dummy is a fake list element for holding the head pointer */ | |
1839 | BlockJobInfoList dummy = {}; | |
1840 | BlockJobInfoList *prev = &dummy; | |
1841 | bdrv_iterate(do_qmp_query_block_jobs_one, &prev); | |
1842 | return dummy.next; | |
1843 | } | |
1844 | ||
1845 | QemuOptsList qemu_common_drive_opts = { | |
1846 | .name = "drive", | |
1847 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), | |
1848 | .desc = { | |
1849 | { | |
1850 | .name = "bus", | |
1851 | .type = QEMU_OPT_NUMBER, | |
1852 | .help = "bus number", | |
1853 | },{ | |
1854 | .name = "unit", | |
1855 | .type = QEMU_OPT_NUMBER, | |
1856 | .help = "unit number (i.e. lun for scsi)", | |
1857 | },{ | |
1858 | .name = "if", | |
1859 | .type = QEMU_OPT_STRING, | |
1860 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
1861 | },{ | |
1862 | .name = "index", | |
1863 | .type = QEMU_OPT_NUMBER, | |
1864 | .help = "index number", | |
1865 | },{ | |
1866 | .name = "cyls", | |
1867 | .type = QEMU_OPT_NUMBER, | |
1868 | .help = "number of cylinders (ide disk geometry)", | |
1869 | },{ | |
1870 | .name = "heads", | |
1871 | .type = QEMU_OPT_NUMBER, | |
1872 | .help = "number of heads (ide disk geometry)", | |
1873 | },{ | |
1874 | .name = "secs", | |
1875 | .type = QEMU_OPT_NUMBER, | |
1876 | .help = "number of sectors (ide disk geometry)", | |
1877 | },{ | |
1878 | .name = "trans", | |
1879 | .type = QEMU_OPT_STRING, | |
1880 | .help = "chs translation (auto, lba. none)", | |
1881 | },{ | |
1882 | .name = "media", | |
1883 | .type = QEMU_OPT_STRING, | |
1884 | .help = "media type (disk, cdrom)", | |
1885 | },{ | |
1886 | .name = "snapshot", | |
1887 | .type = QEMU_OPT_BOOL, | |
1888 | .help = "enable/disable snapshot mode", | |
1889 | },{ | |
1890 | .name = "file", | |
1891 | .type = QEMU_OPT_STRING, | |
1892 | .help = "disk image", | |
1893 | },{ | |
1894 | .name = "discard", | |
1895 | .type = QEMU_OPT_STRING, | |
1896 | .help = "discard operation (ignore/off, unmap/on)", | |
1897 | },{ | |
1898 | .name = "cache.writeback", | |
1899 | .type = QEMU_OPT_BOOL, | |
1900 | .help = "enables writeback mode for any caches", | |
1901 | },{ | |
1902 | .name = "cache.direct", | |
1903 | .type = QEMU_OPT_BOOL, | |
1904 | .help = "enables use of O_DIRECT (bypass the host page cache)", | |
1905 | },{ | |
1906 | .name = "cache.no-flush", | |
1907 | .type = QEMU_OPT_BOOL, | |
1908 | .help = "ignore any flush requests for the device", | |
1909 | },{ | |
1910 | .name = "aio", | |
1911 | .type = QEMU_OPT_STRING, | |
1912 | .help = "host AIO implementation (threads, native)", | |
1913 | },{ | |
1914 | .name = "format", | |
1915 | .type = QEMU_OPT_STRING, | |
1916 | .help = "disk format (raw, qcow2, ...)", | |
1917 | },{ | |
1918 | .name = "serial", | |
1919 | .type = QEMU_OPT_STRING, | |
1920 | .help = "disk serial number", | |
1921 | },{ | |
1922 | .name = "rerror", | |
1923 | .type = QEMU_OPT_STRING, | |
1924 | .help = "read error action", | |
1925 | },{ | |
1926 | .name = "werror", | |
1927 | .type = QEMU_OPT_STRING, | |
1928 | .help = "write error action", | |
1929 | },{ | |
1930 | .name = "addr", | |
1931 | .type = QEMU_OPT_STRING, | |
1932 | .help = "pci address (virtio only)", | |
1933 | },{ | |
1934 | .name = "read-only", | |
1935 | .type = QEMU_OPT_BOOL, | |
1936 | .help = "open drive file as read-only", | |
1937 | },{ | |
1938 | .name = "throttling.iops-total", | |
1939 | .type = QEMU_OPT_NUMBER, | |
1940 | .help = "limit total I/O operations per second", | |
1941 | },{ | |
1942 | .name = "throttling.iops-read", | |
1943 | .type = QEMU_OPT_NUMBER, | |
1944 | .help = "limit read operations per second", | |
1945 | },{ | |
1946 | .name = "throttling.iops-write", | |
1947 | .type = QEMU_OPT_NUMBER, | |
1948 | .help = "limit write operations per second", | |
1949 | },{ | |
1950 | .name = "throttling.bps-total", | |
1951 | .type = QEMU_OPT_NUMBER, | |
1952 | .help = "limit total bytes per second", | |
1953 | },{ | |
1954 | .name = "throttling.bps-read", | |
1955 | .type = QEMU_OPT_NUMBER, | |
1956 | .help = "limit read bytes per second", | |
1957 | },{ | |
1958 | .name = "throttling.bps-write", | |
1959 | .type = QEMU_OPT_NUMBER, | |
1960 | .help = "limit write bytes per second", | |
1961 | },{ | |
1962 | .name = "copy-on-read", | |
1963 | .type = QEMU_OPT_BOOL, | |
1964 | .help = "copy read data from backing file into image file", | |
1965 | },{ | |
1966 | .name = "boot", | |
1967 | .type = QEMU_OPT_BOOL, | |
1968 | .help = "(deprecated, ignored)", | |
1969 | }, | |
1970 | { /* end of list */ } | |
1971 | }, | |
1972 | }; | |
1973 | ||
1974 | QemuOptsList qemu_drive_opts = { | |
1975 | .name = "drive", | |
1976 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
1977 | .desc = { | |
1978 | /* | |
1979 | * no elements => accept any params | |
1980 | * validation will happen later | |
1981 | */ | |
1982 | { /* end of list */ } | |
1983 | }, | |
1984 | }; |