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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 | ||
10 | #include "blockdev.h" | |
11 | #include "hw/block-common.h" | |
12 | #include "blockjob.h" | |
13 | #include "monitor.h" | |
14 | #include "qerror.h" | |
15 | #include "qemu-option.h" | |
16 | #include "qemu-config.h" | |
17 | #include "qemu-objects.h" | |
18 | #include "sysemu.h" | |
19 | #include "block_int.h" | |
20 | #include "qmp-commands.h" | |
21 | #include "trace.h" | |
22 | #include "arch_init.h" | |
23 | ||
24 | static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); | |
25 | ||
26 | static const char *const if_name[IF_COUNT] = { | |
27 | [IF_NONE] = "none", | |
28 | [IF_IDE] = "ide", | |
29 | [IF_SCSI] = "scsi", | |
30 | [IF_FLOPPY] = "floppy", | |
31 | [IF_PFLASH] = "pflash", | |
32 | [IF_MTD] = "mtd", | |
33 | [IF_SD] = "sd", | |
34 | [IF_VIRTIO] = "virtio", | |
35 | [IF_XEN] = "xen", | |
36 | }; | |
37 | ||
38 | static const int if_max_devs[IF_COUNT] = { | |
39 | /* | |
40 | * Do not change these numbers! They govern how drive option | |
41 | * index maps to unit and bus. That mapping is ABI. | |
42 | * | |
43 | * All controllers used to imlement if=T drives need to support | |
44 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
45 | * Otherwise, some index values map to "impossible" bus, unit | |
46 | * values. | |
47 | * | |
48 | * For instance, if you change [IF_SCSI] to 255, -drive | |
49 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
50 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
51 | * the drive can't be set up. Regression. | |
52 | */ | |
53 | [IF_IDE] = 2, | |
54 | [IF_SCSI] = 7, | |
55 | }; | |
56 | ||
57 | /* | |
58 | * We automatically delete the drive when a device using it gets | |
59 | * unplugged. Questionable feature, but we can't just drop it. | |
60 | * Device models call blockdev_mark_auto_del() to schedule the | |
61 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
62 | * when deletion is actually safe. | |
63 | */ | |
64 | void blockdev_mark_auto_del(BlockDriverState *bs) | |
65 | { | |
66 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
67 | ||
68 | if (bs->job) { | |
69 | block_job_cancel(bs->job); | |
70 | } | |
71 | if (dinfo) { | |
72 | dinfo->auto_del = 1; | |
73 | } | |
74 | } | |
75 | ||
76 | void blockdev_auto_del(BlockDriverState *bs) | |
77 | { | |
78 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
79 | ||
80 | if (dinfo && dinfo->auto_del) { | |
81 | drive_put_ref(dinfo); | |
82 | } | |
83 | } | |
84 | ||
85 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) | |
86 | { | |
87 | int max_devs = if_max_devs[type]; | |
88 | return max_devs ? index / max_devs : 0; | |
89 | } | |
90 | ||
91 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
92 | { | |
93 | int max_devs = if_max_devs[type]; | |
94 | return max_devs ? index % max_devs : index; | |
95 | } | |
96 | ||
97 | QemuOpts *drive_def(const char *optstr) | |
98 | { | |
99 | return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); | |
100 | } | |
101 | ||
102 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
103 | const char *optstr) | |
104 | { | |
105 | QemuOpts *opts; | |
106 | char buf[32]; | |
107 | ||
108 | opts = drive_def(optstr); | |
109 | if (!opts) { | |
110 | return NULL; | |
111 | } | |
112 | if (type != IF_DEFAULT) { | |
113 | qemu_opt_set(opts, "if", if_name[type]); | |
114 | } | |
115 | if (index >= 0) { | |
116 | snprintf(buf, sizeof(buf), "%d", index); | |
117 | qemu_opt_set(opts, "index", buf); | |
118 | } | |
119 | if (file) | |
120 | qemu_opt_set(opts, "file", file); | |
121 | return opts; | |
122 | } | |
123 | ||
124 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
125 | { | |
126 | DriveInfo *dinfo; | |
127 | ||
128 | /* seek interface, bus and unit */ | |
129 | ||
130 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
131 | if (dinfo->type == type && | |
132 | dinfo->bus == bus && | |
133 | dinfo->unit == unit) | |
134 | return dinfo; | |
135 | } | |
136 | ||
137 | return NULL; | |
138 | } | |
139 | ||
140 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) | |
141 | { | |
142 | return drive_get(type, | |
143 | drive_index_to_bus_id(type, index), | |
144 | drive_index_to_unit_id(type, index)); | |
145 | } | |
146 | ||
147 | int drive_get_max_bus(BlockInterfaceType type) | |
148 | { | |
149 | int max_bus; | |
150 | DriveInfo *dinfo; | |
151 | ||
152 | max_bus = -1; | |
153 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
154 | if(dinfo->type == type && | |
155 | dinfo->bus > max_bus) | |
156 | max_bus = dinfo->bus; | |
157 | } | |
158 | return max_bus; | |
159 | } | |
160 | ||
161 | /* Get a block device. This should only be used for single-drive devices | |
162 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
163 | appropriate bus. */ | |
164 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
165 | { | |
166 | static int next_block_unit[IF_COUNT]; | |
167 | ||
168 | return drive_get(type, 0, next_block_unit[type]++); | |
169 | } | |
170 | ||
171 | DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) | |
172 | { | |
173 | DriveInfo *dinfo; | |
174 | ||
175 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
176 | if (dinfo->bdrv == bs) { | |
177 | return dinfo; | |
178 | } | |
179 | } | |
180 | return NULL; | |
181 | } | |
182 | ||
183 | static void bdrv_format_print(void *opaque, const char *name) | |
184 | { | |
185 | error_printf(" %s", name); | |
186 | } | |
187 | ||
188 | static void drive_uninit(DriveInfo *dinfo) | |
189 | { | |
190 | qemu_opts_del(dinfo->opts); | |
191 | bdrv_delete(dinfo->bdrv); | |
192 | g_free(dinfo->id); | |
193 | QTAILQ_REMOVE(&drives, dinfo, next); | |
194 | g_free(dinfo); | |
195 | } | |
196 | ||
197 | void drive_put_ref(DriveInfo *dinfo) | |
198 | { | |
199 | assert(dinfo->refcount); | |
200 | if (--dinfo->refcount == 0) { | |
201 | drive_uninit(dinfo); | |
202 | } | |
203 | } | |
204 | ||
205 | void drive_get_ref(DriveInfo *dinfo) | |
206 | { | |
207 | dinfo->refcount++; | |
208 | } | |
209 | ||
210 | typedef struct { | |
211 | QEMUBH *bh; | |
212 | DriveInfo *dinfo; | |
213 | } DrivePutRefBH; | |
214 | ||
215 | static void drive_put_ref_bh(void *opaque) | |
216 | { | |
217 | DrivePutRefBH *s = opaque; | |
218 | ||
219 | drive_put_ref(s->dinfo); | |
220 | qemu_bh_delete(s->bh); | |
221 | g_free(s); | |
222 | } | |
223 | ||
224 | /* | |
225 | * Release a drive reference in a BH | |
226 | * | |
227 | * It is not possible to use drive_put_ref() from a callback function when the | |
228 | * callers still need the drive. In such cases we schedule a BH to release the | |
229 | * reference. | |
230 | */ | |
231 | static void drive_put_ref_bh_schedule(DriveInfo *dinfo) | |
232 | { | |
233 | DrivePutRefBH *s; | |
234 | ||
235 | s = g_new(DrivePutRefBH, 1); | |
236 | s->bh = qemu_bh_new(drive_put_ref_bh, s); | |
237 | s->dinfo = dinfo; | |
238 | qemu_bh_schedule(s->bh); | |
239 | } | |
240 | ||
241 | static int parse_block_error_action(const char *buf, bool is_read) | |
242 | { | |
243 | if (!strcmp(buf, "ignore")) { | |
244 | return BLOCKDEV_ON_ERROR_IGNORE; | |
245 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
246 | return BLOCKDEV_ON_ERROR_ENOSPC; | |
247 | } else if (!strcmp(buf, "stop")) { | |
248 | return BLOCKDEV_ON_ERROR_STOP; | |
249 | } else if (!strcmp(buf, "report")) { | |
250 | return BLOCKDEV_ON_ERROR_REPORT; | |
251 | } else { | |
252 | error_report("'%s' invalid %s error action", | |
253 | buf, is_read ? "read" : "write"); | |
254 | return -1; | |
255 | } | |
256 | } | |
257 | ||
258 | static bool do_check_io_limits(BlockIOLimit *io_limits) | |
259 | { | |
260 | bool bps_flag; | |
261 | bool iops_flag; | |
262 | ||
263 | assert(io_limits); | |
264 | ||
265 | bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0) | |
266 | && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0) | |
267 | || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0)); | |
268 | iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0) | |
269 | && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0) | |
270 | || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0)); | |
271 | if (bps_flag || iops_flag) { | |
272 | return false; | |
273 | } | |
274 | ||
275 | return true; | |
276 | } | |
277 | ||
278 | DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi) | |
279 | { | |
280 | const char *buf; | |
281 | const char *file = NULL; | |
282 | const char *serial; | |
283 | const char *mediastr = ""; | |
284 | BlockInterfaceType type; | |
285 | enum { MEDIA_DISK, MEDIA_CDROM } media; | |
286 | int bus_id, unit_id; | |
287 | int cyls, heads, secs, translation; | |
288 | BlockDriver *drv = NULL; | |
289 | int max_devs; | |
290 | int index; | |
291 | int ro = 0; | |
292 | int bdrv_flags = 0; | |
293 | int on_read_error, on_write_error; | |
294 | const char *devaddr; | |
295 | DriveInfo *dinfo; | |
296 | BlockIOLimit io_limits; | |
297 | int snapshot = 0; | |
298 | bool copy_on_read; | |
299 | int ret; | |
300 | ||
301 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
302 | media = MEDIA_DISK; | |
303 | ||
304 | /* extract parameters */ | |
305 | bus_id = qemu_opt_get_number(opts, "bus", 0); | |
306 | unit_id = qemu_opt_get_number(opts, "unit", -1); | |
307 | index = qemu_opt_get_number(opts, "index", -1); | |
308 | ||
309 | cyls = qemu_opt_get_number(opts, "cyls", 0); | |
310 | heads = qemu_opt_get_number(opts, "heads", 0); | |
311 | secs = qemu_opt_get_number(opts, "secs", 0); | |
312 | ||
313 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); | |
314 | ro = qemu_opt_get_bool(opts, "readonly", 0); | |
315 | copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); | |
316 | ||
317 | file = qemu_opt_get(opts, "file"); | |
318 | serial = qemu_opt_get(opts, "serial"); | |
319 | ||
320 | if ((buf = qemu_opt_get(opts, "if")) != NULL) { | |
321 | for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) | |
322 | ; | |
323 | if (type == IF_COUNT) { | |
324 | error_report("unsupported bus type '%s'", buf); | |
325 | return NULL; | |
326 | } | |
327 | } else { | |
328 | type = default_to_scsi ? IF_SCSI : IF_IDE; | |
329 | } | |
330 | ||
331 | max_devs = if_max_devs[type]; | |
332 | ||
333 | if (cyls || heads || secs) { | |
334 | if (cyls < 1) { | |
335 | error_report("invalid physical cyls number"); | |
336 | return NULL; | |
337 | } | |
338 | if (heads < 1) { | |
339 | error_report("invalid physical heads number"); | |
340 | return NULL; | |
341 | } | |
342 | if (secs < 1) { | |
343 | error_report("invalid physical secs number"); | |
344 | return NULL; | |
345 | } | |
346 | } | |
347 | ||
348 | if ((buf = qemu_opt_get(opts, "trans")) != NULL) { | |
349 | if (!cyls) { | |
350 | error_report("'%s' trans must be used with cyls, heads and secs", | |
351 | buf); | |
352 | return NULL; | |
353 | } | |
354 | if (!strcmp(buf, "none")) | |
355 | translation = BIOS_ATA_TRANSLATION_NONE; | |
356 | else if (!strcmp(buf, "lba")) | |
357 | translation = BIOS_ATA_TRANSLATION_LBA; | |
358 | else if (!strcmp(buf, "auto")) | |
359 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
360 | else { | |
361 | error_report("'%s' invalid translation type", buf); | |
362 | return NULL; | |
363 | } | |
364 | } | |
365 | ||
366 | if ((buf = qemu_opt_get(opts, "media")) != NULL) { | |
367 | if (!strcmp(buf, "disk")) { | |
368 | media = MEDIA_DISK; | |
369 | } else if (!strcmp(buf, "cdrom")) { | |
370 | if (cyls || secs || heads) { | |
371 | error_report("CHS can't be set with media=%s", buf); | |
372 | return NULL; | |
373 | } | |
374 | media = MEDIA_CDROM; | |
375 | } else { | |
376 | error_report("'%s' invalid media", buf); | |
377 | return NULL; | |
378 | } | |
379 | } | |
380 | ||
381 | bdrv_flags |= BDRV_O_CACHE_WB; | |
382 | if ((buf = qemu_opt_get(opts, "cache")) != NULL) { | |
383 | if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { | |
384 | error_report("invalid cache option"); | |
385 | return NULL; | |
386 | } | |
387 | } | |
388 | ||
389 | #ifdef CONFIG_LINUX_AIO | |
390 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
391 | if (!strcmp(buf, "native")) { | |
392 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
393 | } else if (!strcmp(buf, "threads")) { | |
394 | /* this is the default */ | |
395 | } else { | |
396 | error_report("invalid aio option"); | |
397 | return NULL; | |
398 | } | |
399 | } | |
400 | #endif | |
401 | ||
402 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
403 | if (is_help_option(buf)) { | |
404 | error_printf("Supported formats:"); | |
405 | bdrv_iterate_format(bdrv_format_print, NULL); | |
406 | error_printf("\n"); | |
407 | return NULL; | |
408 | } | |
409 | drv = bdrv_find_whitelisted_format(buf); | |
410 | if (!drv) { | |
411 | error_report("'%s' invalid format", buf); | |
412 | return NULL; | |
413 | } | |
414 | } | |
415 | ||
416 | /* disk I/O throttling */ | |
417 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = | |
418 | qemu_opt_get_number(opts, "bps", 0); | |
419 | io_limits.bps[BLOCK_IO_LIMIT_READ] = | |
420 | qemu_opt_get_number(opts, "bps_rd", 0); | |
421 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = | |
422 | qemu_opt_get_number(opts, "bps_wr", 0); | |
423 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = | |
424 | qemu_opt_get_number(opts, "iops", 0); | |
425 | io_limits.iops[BLOCK_IO_LIMIT_READ] = | |
426 | qemu_opt_get_number(opts, "iops_rd", 0); | |
427 | io_limits.iops[BLOCK_IO_LIMIT_WRITE] = | |
428 | qemu_opt_get_number(opts, "iops_wr", 0); | |
429 | ||
430 | if (!do_check_io_limits(&io_limits)) { | |
431 | error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " | |
432 | "cannot be used at the same time"); | |
433 | return NULL; | |
434 | } | |
435 | ||
436 | if (qemu_opt_get(opts, "boot") != NULL) { | |
437 | fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " | |
438 | "ignored. Future versions will reject this parameter. Please " | |
439 | "update your scripts.\n"); | |
440 | } | |
441 | ||
442 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; | |
443 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
444 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { | |
445 | error_report("werror is not supported by this bus type"); | |
446 | return NULL; | |
447 | } | |
448 | ||
449 | on_write_error = parse_block_error_action(buf, 0); | |
450 | if (on_write_error < 0) { | |
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); | |
463 | if (on_read_error < 0) { | |
464 | return NULL; | |
465 | } | |
466 | } | |
467 | ||
468 | if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { | |
469 | if (type != IF_VIRTIO) { | |
470 | error_report("addr is not supported by this bus type"); | |
471 | return NULL; | |
472 | } | |
473 | } | |
474 | ||
475 | /* compute bus and unit according index */ | |
476 | ||
477 | if (index != -1) { | |
478 | if (bus_id != 0 || unit_id != -1) { | |
479 | error_report("index cannot be used with bus and unit"); | |
480 | return NULL; | |
481 | } | |
482 | bus_id = drive_index_to_bus_id(type, index); | |
483 | unit_id = drive_index_to_unit_id(type, index); | |
484 | } | |
485 | ||
486 | /* if user doesn't specify a unit_id, | |
487 | * try to find the first free | |
488 | */ | |
489 | ||
490 | if (unit_id == -1) { | |
491 | unit_id = 0; | |
492 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
493 | unit_id++; | |
494 | if (max_devs && unit_id >= max_devs) { | |
495 | unit_id -= max_devs; | |
496 | bus_id++; | |
497 | } | |
498 | } | |
499 | } | |
500 | ||
501 | /* check unit id */ | |
502 | ||
503 | if (max_devs && unit_id >= max_devs) { | |
504 | error_report("unit %d too big (max is %d)", | |
505 | unit_id, max_devs - 1); | |
506 | return NULL; | |
507 | } | |
508 | ||
509 | /* | |
510 | * catch multiple definitions | |
511 | */ | |
512 | ||
513 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
514 | error_report("drive with bus=%d, unit=%d (index=%d) exists", | |
515 | bus_id, unit_id, index); | |
516 | return NULL; | |
517 | } | |
518 | ||
519 | /* init */ | |
520 | ||
521 | dinfo = g_malloc0(sizeof(*dinfo)); | |
522 | if ((buf = qemu_opts_id(opts)) != NULL) { | |
523 | dinfo->id = g_strdup(buf); | |
524 | } else { | |
525 | /* no id supplied -> create one */ | |
526 | dinfo->id = g_malloc0(32); | |
527 | if (type == IF_IDE || type == IF_SCSI) | |
528 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
529 | if (max_devs) | |
530 | snprintf(dinfo->id, 32, "%s%i%s%i", | |
531 | if_name[type], bus_id, mediastr, unit_id); | |
532 | else | |
533 | snprintf(dinfo->id, 32, "%s%s%i", | |
534 | if_name[type], mediastr, unit_id); | |
535 | } | |
536 | dinfo->bdrv = bdrv_new(dinfo->id); | |
537 | dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; | |
538 | dinfo->bdrv->read_only = ro; | |
539 | dinfo->devaddr = devaddr; | |
540 | dinfo->type = type; | |
541 | dinfo->bus = bus_id; | |
542 | dinfo->unit = unit_id; | |
543 | dinfo->cyls = cyls; | |
544 | dinfo->heads = heads; | |
545 | dinfo->secs = secs; | |
546 | dinfo->trans = translation; | |
547 | dinfo->opts = opts; | |
548 | dinfo->refcount = 1; | |
549 | dinfo->serial = serial; | |
550 | QTAILQ_INSERT_TAIL(&drives, dinfo, next); | |
551 | ||
552 | bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); | |
553 | ||
554 | /* disk I/O throttling */ | |
555 | bdrv_set_io_limits(dinfo->bdrv, &io_limits); | |
556 | ||
557 | switch(type) { | |
558 | case IF_IDE: | |
559 | case IF_SCSI: | |
560 | case IF_XEN: | |
561 | case IF_NONE: | |
562 | dinfo->media_cd = media == MEDIA_CDROM; | |
563 | break; | |
564 | case IF_SD: | |
565 | case IF_FLOPPY: | |
566 | case IF_PFLASH: | |
567 | case IF_MTD: | |
568 | break; | |
569 | case IF_VIRTIO: | |
570 | /* add virtio block device */ | |
571 | opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, NULL); | |
572 | if (arch_type == QEMU_ARCH_S390X) { | |
573 | qemu_opt_set(opts, "driver", "virtio-blk-s390"); | |
574 | } else { | |
575 | qemu_opt_set(opts, "driver", "virtio-blk-pci"); | |
576 | } | |
577 | qemu_opt_set(opts, "drive", dinfo->id); | |
578 | if (devaddr) | |
579 | qemu_opt_set(opts, "addr", devaddr); | |
580 | break; | |
581 | default: | |
582 | abort(); | |
583 | } | |
584 | if (!file || !*file) { | |
585 | return dinfo; | |
586 | } | |
587 | if (snapshot) { | |
588 | /* always use cache=unsafe with snapshot */ | |
589 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
590 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
591 | } | |
592 | ||
593 | if (copy_on_read) { | |
594 | bdrv_flags |= BDRV_O_COPY_ON_READ; | |
595 | } | |
596 | ||
597 | if (runstate_check(RUN_STATE_INMIGRATE)) { | |
598 | bdrv_flags |= BDRV_O_INCOMING; | |
599 | } | |
600 | ||
601 | if (media == MEDIA_CDROM) { | |
602 | /* CDROM is fine for any interface, don't check. */ | |
603 | ro = 1; | |
604 | } else if (ro == 1) { | |
605 | if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && | |
606 | type != IF_NONE && type != IF_PFLASH) { | |
607 | error_report("readonly not supported by this bus type"); | |
608 | goto err; | |
609 | } | |
610 | } | |
611 | ||
612 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; | |
613 | ||
614 | if (ro && copy_on_read) { | |
615 | error_report("warning: disabling copy_on_read on readonly drive"); | |
616 | } | |
617 | ||
618 | ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); | |
619 | if (ret < 0) { | |
620 | error_report("could not open disk image %s: %s", | |
621 | file, strerror(-ret)); | |
622 | goto err; | |
623 | } | |
624 | ||
625 | if (bdrv_key_required(dinfo->bdrv)) | |
626 | autostart = 0; | |
627 | return dinfo; | |
628 | ||
629 | err: | |
630 | bdrv_delete(dinfo->bdrv); | |
631 | g_free(dinfo->id); | |
632 | QTAILQ_REMOVE(&drives, dinfo, next); | |
633 | g_free(dinfo); | |
634 | return NULL; | |
635 | } | |
636 | ||
637 | void do_commit(Monitor *mon, const QDict *qdict) | |
638 | { | |
639 | const char *device = qdict_get_str(qdict, "device"); | |
640 | BlockDriverState *bs; | |
641 | int ret; | |
642 | ||
643 | if (!strcmp(device, "all")) { | |
644 | ret = bdrv_commit_all(); | |
645 | if (ret == -EBUSY) { | |
646 | qerror_report(QERR_DEVICE_IN_USE, device); | |
647 | return; | |
648 | } | |
649 | } else { | |
650 | bs = bdrv_find(device); | |
651 | if (!bs) { | |
652 | qerror_report(QERR_DEVICE_NOT_FOUND, device); | |
653 | return; | |
654 | } | |
655 | ret = bdrv_commit(bs); | |
656 | if (ret == -EBUSY) { | |
657 | qerror_report(QERR_DEVICE_IN_USE, device); | |
658 | return; | |
659 | } | |
660 | } | |
661 | } | |
662 | ||
663 | static void blockdev_do_action(int kind, void *data, Error **errp) | |
664 | { | |
665 | BlockdevAction action; | |
666 | BlockdevActionList list; | |
667 | ||
668 | action.kind = kind; | |
669 | action.data = data; | |
670 | list.value = &action; | |
671 | list.next = NULL; | |
672 | qmp_transaction(&list, errp); | |
673 | } | |
674 | ||
675 | void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, | |
676 | bool has_format, const char *format, | |
677 | bool has_mode, enum NewImageMode mode, | |
678 | Error **errp) | |
679 | { | |
680 | BlockdevSnapshot snapshot = { | |
681 | .device = (char *) device, | |
682 | .snapshot_file = (char *) snapshot_file, | |
683 | .has_format = has_format, | |
684 | .format = (char *) format, | |
685 | .has_mode = has_mode, | |
686 | .mode = mode, | |
687 | }; | |
688 | blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot, | |
689 | errp); | |
690 | } | |
691 | ||
692 | ||
693 | /* New and old BlockDriverState structs for group snapshots */ | |
694 | typedef struct BlkTransactionStates { | |
695 | BlockDriverState *old_bs; | |
696 | BlockDriverState *new_bs; | |
697 | QSIMPLEQ_ENTRY(BlkTransactionStates) entry; | |
698 | } BlkTransactionStates; | |
699 | ||
700 | /* | |
701 | * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail | |
702 | * then we do not pivot any of the devices in the group, and abandon the | |
703 | * snapshots | |
704 | */ | |
705 | void qmp_transaction(BlockdevActionList *dev_list, Error **errp) | |
706 | { | |
707 | int ret = 0; | |
708 | BlockdevActionList *dev_entry = dev_list; | |
709 | BlkTransactionStates *states, *next; | |
710 | ||
711 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states; | |
712 | QSIMPLEQ_INIT(&snap_bdrv_states); | |
713 | ||
714 | /* drain all i/o before any snapshots */ | |
715 | bdrv_drain_all(); | |
716 | ||
717 | /* We don't do anything in this loop that commits us to the snapshot */ | |
718 | while (NULL != dev_entry) { | |
719 | BlockdevAction *dev_info = NULL; | |
720 | BlockDriver *proto_drv; | |
721 | BlockDriver *drv; | |
722 | int flags; | |
723 | enum NewImageMode mode; | |
724 | const char *new_image_file; | |
725 | const char *device; | |
726 | const char *format = "qcow2"; | |
727 | ||
728 | dev_info = dev_entry->value; | |
729 | dev_entry = dev_entry->next; | |
730 | ||
731 | states = g_malloc0(sizeof(BlkTransactionStates)); | |
732 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry); | |
733 | ||
734 | switch (dev_info->kind) { | |
735 | case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
736 | device = dev_info->blockdev_snapshot_sync->device; | |
737 | if (!dev_info->blockdev_snapshot_sync->has_mode) { | |
738 | dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
739 | } | |
740 | new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file; | |
741 | if (dev_info->blockdev_snapshot_sync->has_format) { | |
742 | format = dev_info->blockdev_snapshot_sync->format; | |
743 | } | |
744 | mode = dev_info->blockdev_snapshot_sync->mode; | |
745 | break; | |
746 | default: | |
747 | abort(); | |
748 | } | |
749 | ||
750 | drv = bdrv_find_format(format); | |
751 | if (!drv) { | |
752 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
753 | goto delete_and_fail; | |
754 | } | |
755 | ||
756 | states->old_bs = bdrv_find(device); | |
757 | if (!states->old_bs) { | |
758 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
759 | goto delete_and_fail; | |
760 | } | |
761 | ||
762 | if (!bdrv_is_inserted(states->old_bs)) { | |
763 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
764 | goto delete_and_fail; | |
765 | } | |
766 | ||
767 | if (bdrv_in_use(states->old_bs)) { | |
768 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
769 | goto delete_and_fail; | |
770 | } | |
771 | ||
772 | if (!bdrv_is_read_only(states->old_bs)) { | |
773 | if (bdrv_flush(states->old_bs)) { | |
774 | error_set(errp, QERR_IO_ERROR); | |
775 | goto delete_and_fail; | |
776 | } | |
777 | } | |
778 | ||
779 | flags = states->old_bs->open_flags; | |
780 | ||
781 | proto_drv = bdrv_find_protocol(new_image_file); | |
782 | if (!proto_drv) { | |
783 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
784 | goto delete_and_fail; | |
785 | } | |
786 | ||
787 | /* create new image w/backing file */ | |
788 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
789 | ret = bdrv_img_create(new_image_file, format, | |
790 | states->old_bs->filename, | |
791 | states->old_bs->drv->format_name, | |
792 | NULL, -1, flags); | |
793 | if (ret) { | |
794 | error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); | |
795 | goto delete_and_fail; | |
796 | } | |
797 | } | |
798 | ||
799 | /* We will manually add the backing_hd field to the bs later */ | |
800 | states->new_bs = bdrv_new(""); | |
801 | ret = bdrv_open(states->new_bs, new_image_file, | |
802 | flags | BDRV_O_NO_BACKING, drv); | |
803 | if (ret != 0) { | |
804 | error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); | |
805 | goto delete_and_fail; | |
806 | } | |
807 | } | |
808 | ||
809 | ||
810 | /* Now we are going to do the actual pivot. Everything up to this point | |
811 | * is reversible, but we are committed at this point */ | |
812 | QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { | |
813 | /* This removes our old bs from the bdrv_states, and adds the new bs */ | |
814 | bdrv_append(states->new_bs, states->old_bs); | |
815 | /* We don't need (or want) to use the transactional | |
816 | * bdrv_reopen_multiple() across all the entries at once, because we | |
817 | * don't want to abort all of them if one of them fails the reopen */ | |
818 | bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR, | |
819 | NULL); | |
820 | } | |
821 | ||
822 | /* success */ | |
823 | goto exit; | |
824 | ||
825 | delete_and_fail: | |
826 | /* | |
827 | * failure, and it is all-or-none; abandon each new bs, and keep using | |
828 | * the original bs for all images | |
829 | */ | |
830 | QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { | |
831 | if (states->new_bs) { | |
832 | bdrv_delete(states->new_bs); | |
833 | } | |
834 | } | |
835 | exit: | |
836 | QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) { | |
837 | g_free(states); | |
838 | } | |
839 | } | |
840 | ||
841 | ||
842 | static void eject_device(BlockDriverState *bs, int force, Error **errp) | |
843 | { | |
844 | if (bdrv_in_use(bs)) { | |
845 | error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); | |
846 | return; | |
847 | } | |
848 | if (!bdrv_dev_has_removable_media(bs)) { | |
849 | error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); | |
850 | return; | |
851 | } | |
852 | ||
853 | if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { | |
854 | bdrv_dev_eject_request(bs, force); | |
855 | if (!force) { | |
856 | error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); | |
857 | return; | |
858 | } | |
859 | } | |
860 | ||
861 | bdrv_close(bs); | |
862 | } | |
863 | ||
864 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) | |
865 | { | |
866 | BlockDriverState *bs; | |
867 | ||
868 | bs = bdrv_find(device); | |
869 | if (!bs) { | |
870 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
871 | return; | |
872 | } | |
873 | ||
874 | eject_device(bs, force, errp); | |
875 | } | |
876 | ||
877 | void qmp_block_passwd(const char *device, const char *password, Error **errp) | |
878 | { | |
879 | BlockDriverState *bs; | |
880 | int err; | |
881 | ||
882 | bs = bdrv_find(device); | |
883 | if (!bs) { | |
884 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
885 | return; | |
886 | } | |
887 | ||
888 | err = bdrv_set_key(bs, password); | |
889 | if (err == -EINVAL) { | |
890 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
891 | return; | |
892 | } else if (err < 0) { | |
893 | error_set(errp, QERR_INVALID_PASSWORD); | |
894 | return; | |
895 | } | |
896 | } | |
897 | ||
898 | static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, | |
899 | int bdrv_flags, BlockDriver *drv, | |
900 | const char *password, Error **errp) | |
901 | { | |
902 | if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { | |
903 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
904 | return; | |
905 | } | |
906 | ||
907 | if (bdrv_key_required(bs)) { | |
908 | if (password) { | |
909 | if (bdrv_set_key(bs, password) < 0) { | |
910 | error_set(errp, QERR_INVALID_PASSWORD); | |
911 | } | |
912 | } else { | |
913 | error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), | |
914 | bdrv_get_encrypted_filename(bs)); | |
915 | } | |
916 | } else if (password) { | |
917 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
918 | } | |
919 | } | |
920 | ||
921 | void qmp_change_blockdev(const char *device, const char *filename, | |
922 | bool has_format, const char *format, Error **errp) | |
923 | { | |
924 | BlockDriverState *bs; | |
925 | BlockDriver *drv = NULL; | |
926 | int bdrv_flags; | |
927 | Error *err = NULL; | |
928 | ||
929 | bs = bdrv_find(device); | |
930 | if (!bs) { | |
931 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
932 | return; | |
933 | } | |
934 | ||
935 | if (format) { | |
936 | drv = bdrv_find_whitelisted_format(format); | |
937 | if (!drv) { | |
938 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
939 | return; | |
940 | } | |
941 | } | |
942 | ||
943 | eject_device(bs, 0, &err); | |
944 | if (error_is_set(&err)) { | |
945 | error_propagate(errp, err); | |
946 | return; | |
947 | } | |
948 | ||
949 | bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; | |
950 | bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; | |
951 | ||
952 | qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); | |
953 | } | |
954 | ||
955 | /* throttling disk I/O limits */ | |
956 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, | |
957 | int64_t bps_wr, int64_t iops, int64_t iops_rd, | |
958 | int64_t iops_wr, Error **errp) | |
959 | { | |
960 | BlockIOLimit io_limits; | |
961 | BlockDriverState *bs; | |
962 | ||
963 | bs = bdrv_find(device); | |
964 | if (!bs) { | |
965 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
966 | return; | |
967 | } | |
968 | ||
969 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; | |
970 | io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; | |
971 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; | |
972 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; | |
973 | io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; | |
974 | io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; | |
975 | ||
976 | if (!do_check_io_limits(&io_limits)) { | |
977 | error_set(errp, QERR_INVALID_PARAMETER_COMBINATION); | |
978 | return; | |
979 | } | |
980 | ||
981 | bs->io_limits = io_limits; | |
982 | bs->slice_time = BLOCK_IO_SLICE_TIME; | |
983 | ||
984 | if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { | |
985 | bdrv_io_limits_enable(bs); | |
986 | } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { | |
987 | bdrv_io_limits_disable(bs); | |
988 | } else { | |
989 | if (bs->block_timer) { | |
990 | qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); | |
991 | } | |
992 | } | |
993 | } | |
994 | ||
995 | int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) | |
996 | { | |
997 | const char *id = qdict_get_str(qdict, "id"); | |
998 | BlockDriverState *bs; | |
999 | ||
1000 | bs = bdrv_find(id); | |
1001 | if (!bs) { | |
1002 | qerror_report(QERR_DEVICE_NOT_FOUND, id); | |
1003 | return -1; | |
1004 | } | |
1005 | if (bdrv_in_use(bs)) { | |
1006 | qerror_report(QERR_DEVICE_IN_USE, id); | |
1007 | return -1; | |
1008 | } | |
1009 | ||
1010 | /* quiesce block driver; prevent further io */ | |
1011 | bdrv_drain_all(); | |
1012 | bdrv_flush(bs); | |
1013 | bdrv_close(bs); | |
1014 | ||
1015 | /* if we have a device attached to this BlockDriverState | |
1016 | * then we need to make the drive anonymous until the device | |
1017 | * can be removed. If this is a drive with no device backing | |
1018 | * then we can just get rid of the block driver state right here. | |
1019 | */ | |
1020 | if (bdrv_get_attached_dev(bs)) { | |
1021 | bdrv_make_anon(bs); | |
1022 | } else { | |
1023 | drive_uninit(drive_get_by_blockdev(bs)); | |
1024 | } | |
1025 | ||
1026 | return 0; | |
1027 | } | |
1028 | ||
1029 | void qmp_block_resize(const char *device, int64_t size, Error **errp) | |
1030 | { | |
1031 | BlockDriverState *bs; | |
1032 | ||
1033 | bs = bdrv_find(device); | |
1034 | if (!bs) { | |
1035 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | if (size < 0) { | |
1040 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); | |
1041 | return; | |
1042 | } | |
1043 | ||
1044 | switch (bdrv_truncate(bs, size)) { | |
1045 | case 0: | |
1046 | break; | |
1047 | case -ENOMEDIUM: | |
1048 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1049 | break; | |
1050 | case -ENOTSUP: | |
1051 | error_set(errp, QERR_UNSUPPORTED); | |
1052 | break; | |
1053 | case -EACCES: | |
1054 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1055 | break; | |
1056 | case -EBUSY: | |
1057 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1058 | break; | |
1059 | default: | |
1060 | error_set(errp, QERR_UNDEFINED_ERROR); | |
1061 | break; | |
1062 | } | |
1063 | } | |
1064 | ||
1065 | static void block_job_cb(void *opaque, int ret) | |
1066 | { | |
1067 | BlockDriverState *bs = opaque; | |
1068 | QObject *obj; | |
1069 | ||
1070 | trace_block_job_cb(bs, bs->job, ret); | |
1071 | ||
1072 | assert(bs->job); | |
1073 | obj = qobject_from_block_job(bs->job); | |
1074 | if (ret < 0) { | |
1075 | QDict *dict = qobject_to_qdict(obj); | |
1076 | qdict_put(dict, "error", qstring_from_str(strerror(-ret))); | |
1077 | } | |
1078 | ||
1079 | if (block_job_is_cancelled(bs->job)) { | |
1080 | monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); | |
1081 | } else { | |
1082 | monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); | |
1083 | } | |
1084 | qobject_decref(obj); | |
1085 | ||
1086 | drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); | |
1087 | } | |
1088 | ||
1089 | void qmp_block_stream(const char *device, bool has_base, | |
1090 | const char *base, bool has_speed, int64_t speed, | |
1091 | bool has_on_error, BlockdevOnError on_error, | |
1092 | Error **errp) | |
1093 | { | |
1094 | BlockDriverState *bs; | |
1095 | BlockDriverState *base_bs = NULL; | |
1096 | Error *local_err = NULL; | |
1097 | ||
1098 | if (!has_on_error) { | |
1099 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
1100 | } | |
1101 | ||
1102 | bs = bdrv_find(device); | |
1103 | if (!bs) { | |
1104 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | if (base) { | |
1109 | base_bs = bdrv_find_backing_image(bs, base); | |
1110 | if (base_bs == NULL) { | |
1111 | error_set(errp, QERR_BASE_NOT_FOUND, base); | |
1112 | return; | |
1113 | } | |
1114 | } | |
1115 | ||
1116 | stream_start(bs, base_bs, base, has_speed ? speed : 0, | |
1117 | on_error, block_job_cb, bs, &local_err); | |
1118 | if (error_is_set(&local_err)) { | |
1119 | error_propagate(errp, local_err); | |
1120 | return; | |
1121 | } | |
1122 | ||
1123 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1124 | * underneath us. | |
1125 | */ | |
1126 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1127 | ||
1128 | trace_qmp_block_stream(bs, bs->job); | |
1129 | } | |
1130 | ||
1131 | void qmp_block_commit(const char *device, | |
1132 | bool has_base, const char *base, const char *top, | |
1133 | bool has_speed, int64_t speed, | |
1134 | Error **errp) | |
1135 | { | |
1136 | BlockDriverState *bs; | |
1137 | BlockDriverState *base_bs, *top_bs; | |
1138 | Error *local_err = NULL; | |
1139 | /* This will be part of the QMP command, if/when the | |
1140 | * BlockdevOnError change for blkmirror makes it in | |
1141 | */ | |
1142 | BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; | |
1143 | ||
1144 | /* drain all i/o before commits */ | |
1145 | bdrv_drain_all(); | |
1146 | ||
1147 | bs = bdrv_find(device); | |
1148 | if (!bs) { | |
1149 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1150 | return; | |
1151 | } | |
1152 | ||
1153 | /* default top_bs is the active layer */ | |
1154 | top_bs = bs; | |
1155 | ||
1156 | if (top) { | |
1157 | if (strcmp(bs->filename, top) != 0) { | |
1158 | top_bs = bdrv_find_backing_image(bs, top); | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | if (top_bs == NULL) { | |
1163 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
1164 | return; | |
1165 | } | |
1166 | ||
1167 | if (has_base && base) { | |
1168 | base_bs = bdrv_find_backing_image(top_bs, base); | |
1169 | } else { | |
1170 | base_bs = bdrv_find_base(top_bs); | |
1171 | } | |
1172 | ||
1173 | if (base_bs == NULL) { | |
1174 | error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); | |
1175 | return; | |
1176 | } | |
1177 | ||
1178 | commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, | |
1179 | &local_err); | |
1180 | if (local_err != NULL) { | |
1181 | error_propagate(errp, local_err); | |
1182 | return; | |
1183 | } | |
1184 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1185 | * underneath us. | |
1186 | */ | |
1187 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1188 | } | |
1189 | ||
1190 | void qmp_drive_mirror(const char *device, const char *target, | |
1191 | bool has_format, const char *format, | |
1192 | enum MirrorSyncMode sync, | |
1193 | bool has_mode, enum NewImageMode mode, | |
1194 | bool has_speed, int64_t speed, | |
1195 | bool has_on_source_error, BlockdevOnError on_source_error, | |
1196 | bool has_on_target_error, BlockdevOnError on_target_error, | |
1197 | Error **errp) | |
1198 | { | |
1199 | BlockDriverInfo bdi; | |
1200 | BlockDriverState *bs; | |
1201 | BlockDriverState *source, *target_bs; | |
1202 | BlockDriver *proto_drv; | |
1203 | BlockDriver *drv = NULL; | |
1204 | Error *local_err = NULL; | |
1205 | int flags; | |
1206 | uint64_t size; | |
1207 | int ret; | |
1208 | ||
1209 | if (!has_speed) { | |
1210 | speed = 0; | |
1211 | } | |
1212 | if (!has_on_source_error) { | |
1213 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
1214 | } | |
1215 | if (!has_on_target_error) { | |
1216 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
1217 | } | |
1218 | if (!has_mode) { | |
1219 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1220 | } | |
1221 | ||
1222 | bs = bdrv_find(device); | |
1223 | if (!bs) { | |
1224 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1225 | return; | |
1226 | } | |
1227 | ||
1228 | if (!bdrv_is_inserted(bs)) { | |
1229 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1230 | return; | |
1231 | } | |
1232 | ||
1233 | if (!has_format) { | |
1234 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
1235 | } | |
1236 | if (format) { | |
1237 | drv = bdrv_find_format(format); | |
1238 | if (!drv) { | |
1239 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
1240 | return; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | if (bdrv_in_use(bs)) { | |
1245 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1246 | return; | |
1247 | } | |
1248 | ||
1249 | flags = bs->open_flags | BDRV_O_RDWR; | |
1250 | source = bs->backing_hd; | |
1251 | if (!source && sync == MIRROR_SYNC_MODE_TOP) { | |
1252 | sync = MIRROR_SYNC_MODE_FULL; | |
1253 | } | |
1254 | ||
1255 | proto_drv = bdrv_find_protocol(target); | |
1256 | if (!proto_drv) { | |
1257 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
1258 | return; | |
1259 | } | |
1260 | ||
1261 | if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) { | |
1262 | /* create new image w/o backing file */ | |
1263 | assert(format && drv); | |
1264 | bdrv_get_geometry(bs, &size); | |
1265 | size *= 512; | |
1266 | ret = bdrv_img_create(target, format, | |
1267 | NULL, NULL, NULL, size, flags); | |
1268 | } else { | |
1269 | switch (mode) { | |
1270 | case NEW_IMAGE_MODE_EXISTING: | |
1271 | ret = 0; | |
1272 | break; | |
1273 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
1274 | /* create new image with backing file */ | |
1275 | ret = bdrv_img_create(target, format, | |
1276 | source->filename, | |
1277 | source->drv->format_name, | |
1278 | NULL, -1, flags); | |
1279 | break; | |
1280 | default: | |
1281 | abort(); | |
1282 | } | |
1283 | } | |
1284 | ||
1285 | if (ret) { | |
1286 | error_set(errp, QERR_OPEN_FILE_FAILED, target); | |
1287 | return; | |
1288 | } | |
1289 | ||
1290 | target_bs = bdrv_new(""); | |
1291 | ret = bdrv_open(target_bs, target, flags | BDRV_O_NO_BACKING, drv); | |
1292 | ||
1293 | if (ret < 0) { | |
1294 | bdrv_delete(target_bs); | |
1295 | error_set(errp, QERR_OPEN_FILE_FAILED, target); | |
1296 | return; | |
1297 | } | |
1298 | ||
1299 | /* We need a backing file if we will copy parts of a cluster. */ | |
1300 | if (bdrv_get_info(target_bs, &bdi) >= 0 && bdi.cluster_size != 0 && | |
1301 | bdi.cluster_size >= BDRV_SECTORS_PER_DIRTY_CHUNK * 512) { | |
1302 | ret = bdrv_open_backing_file(target_bs); | |
1303 | if (ret < 0) { | |
1304 | bdrv_delete(target_bs); | |
1305 | error_set(errp, QERR_OPEN_FILE_FAILED, target); | |
1306 | return; | |
1307 | } | |
1308 | } | |
1309 | ||
1310 | mirror_start(bs, target_bs, speed, sync, on_source_error, on_target_error, | |
1311 | block_job_cb, bs, &local_err); | |
1312 | if (local_err != NULL) { | |
1313 | bdrv_delete(target_bs); | |
1314 | error_propagate(errp, local_err); | |
1315 | return; | |
1316 | } | |
1317 | ||
1318 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1319 | * underneath us. | |
1320 | */ | |
1321 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1322 | } | |
1323 | ||
1324 | static BlockJob *find_block_job(const char *device) | |
1325 | { | |
1326 | BlockDriverState *bs; | |
1327 | ||
1328 | bs = bdrv_find(device); | |
1329 | if (!bs || !bs->job) { | |
1330 | return NULL; | |
1331 | } | |
1332 | return bs->job; | |
1333 | } | |
1334 | ||
1335 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) | |
1336 | { | |
1337 | BlockJob *job = find_block_job(device); | |
1338 | ||
1339 | if (!job) { | |
1340 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1341 | return; | |
1342 | } | |
1343 | ||
1344 | block_job_set_speed(job, speed, errp); | |
1345 | } | |
1346 | ||
1347 | void qmp_block_job_cancel(const char *device, | |
1348 | bool has_force, bool force, Error **errp) | |
1349 | { | |
1350 | BlockJob *job = find_block_job(device); | |
1351 | ||
1352 | if (!has_force) { | |
1353 | force = false; | |
1354 | } | |
1355 | ||
1356 | if (!job) { | |
1357 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1358 | return; | |
1359 | } | |
1360 | if (job->paused && !force) { | |
1361 | error_set(errp, QERR_BLOCK_JOB_PAUSED, device); | |
1362 | return; | |
1363 | } | |
1364 | ||
1365 | trace_qmp_block_job_cancel(job); | |
1366 | block_job_cancel(job); | |
1367 | } | |
1368 | ||
1369 | void qmp_block_job_pause(const char *device, Error **errp) | |
1370 | { | |
1371 | BlockJob *job = find_block_job(device); | |
1372 | ||
1373 | if (!job) { | |
1374 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1375 | return; | |
1376 | } | |
1377 | ||
1378 | trace_qmp_block_job_pause(job); | |
1379 | block_job_pause(job); | |
1380 | } | |
1381 | ||
1382 | void qmp_block_job_resume(const char *device, Error **errp) | |
1383 | { | |
1384 | BlockJob *job = find_block_job(device); | |
1385 | ||
1386 | if (!job) { | |
1387 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1388 | return; | |
1389 | } | |
1390 | ||
1391 | trace_qmp_block_job_resume(job); | |
1392 | block_job_resume(job); | |
1393 | } | |
1394 | ||
1395 | void qmp_block_job_complete(const char *device, Error **errp) | |
1396 | { | |
1397 | BlockJob *job = find_block_job(device); | |
1398 | ||
1399 | if (!job) { | |
1400 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
1401 | return; | |
1402 | } | |
1403 | ||
1404 | trace_qmp_block_job_complete(job); | |
1405 | block_job_complete(job, errp); | |
1406 | } | |
1407 | ||
1408 | static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) | |
1409 | { | |
1410 | BlockJobInfoList **prev = opaque; | |
1411 | BlockJob *job = bs->job; | |
1412 | ||
1413 | if (job) { | |
1414 | BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); | |
1415 | elem->value = block_job_query(bs->job); | |
1416 | (*prev)->next = elem; | |
1417 | *prev = elem; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
1422 | { | |
1423 | /* Dummy is a fake list element for holding the head pointer */ | |
1424 | BlockJobInfoList dummy = {}; | |
1425 | BlockJobInfoList *prev = &dummy; | |
1426 | bdrv_iterate(do_qmp_query_block_jobs_one, &prev); | |
1427 | return dummy.next; | |
1428 | } |