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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 "block.h" | |
11 | #include "blockdev.h" | |
12 | #include "monitor.h" | |
13 | #include "qerror.h" | |
14 | #include "qemu-option.h" | |
15 | #include "qemu-config.h" | |
16 | #include "qemu-objects.h" | |
17 | #include "sysemu.h" | |
18 | #include "block_int.h" | |
19 | #include "qmp-commands.h" | |
20 | #include "trace.h" | |
21 | #include "arch_init.h" | |
22 | ||
23 | static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); | |
24 | ||
25 | static const char *const if_name[IF_COUNT] = { | |
26 | [IF_NONE] = "none", | |
27 | [IF_IDE] = "ide", | |
28 | [IF_SCSI] = "scsi", | |
29 | [IF_FLOPPY] = "floppy", | |
30 | [IF_PFLASH] = "pflash", | |
31 | [IF_MTD] = "mtd", | |
32 | [IF_SD] = "sd", | |
33 | [IF_VIRTIO] = "virtio", | |
34 | [IF_XEN] = "xen", | |
35 | }; | |
36 | ||
37 | static const int if_max_devs[IF_COUNT] = { | |
38 | /* | |
39 | * Do not change these numbers! They govern how drive option | |
40 | * index maps to unit and bus. That mapping is ABI. | |
41 | * | |
42 | * All controllers used to imlement if=T drives need to support | |
43 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
44 | * Otherwise, some index values map to "impossible" bus, unit | |
45 | * values. | |
46 | * | |
47 | * For instance, if you change [IF_SCSI] to 255, -drive | |
48 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
49 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
50 | * the drive can't be set up. Regression. | |
51 | */ | |
52 | [IF_IDE] = 2, | |
53 | [IF_SCSI] = 7, | |
54 | }; | |
55 | ||
56 | /* | |
57 | * We automatically delete the drive when a device using it gets | |
58 | * unplugged. Questionable feature, but we can't just drop it. | |
59 | * Device models call blockdev_mark_auto_del() to schedule the | |
60 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
61 | * when deletion is actually safe. | |
62 | */ | |
63 | void blockdev_mark_auto_del(BlockDriverState *bs) | |
64 | { | |
65 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
66 | ||
67 | if (bs->job) { | |
68 | block_job_cancel(bs->job); | |
69 | } | |
70 | if (dinfo) { | |
71 | dinfo->auto_del = 1; | |
72 | } | |
73 | } | |
74 | ||
75 | void blockdev_auto_del(BlockDriverState *bs) | |
76 | { | |
77 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
78 | ||
79 | if (dinfo && dinfo->auto_del) { | |
80 | drive_put_ref(dinfo); | |
81 | } | |
82 | } | |
83 | ||
84 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) | |
85 | { | |
86 | int max_devs = if_max_devs[type]; | |
87 | return max_devs ? index / max_devs : 0; | |
88 | } | |
89 | ||
90 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
91 | { | |
92 | int max_devs = if_max_devs[type]; | |
93 | return max_devs ? index % max_devs : index; | |
94 | } | |
95 | ||
96 | QemuOpts *drive_def(const char *optstr) | |
97 | { | |
98 | return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); | |
99 | } | |
100 | ||
101 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
102 | const char *optstr) | |
103 | { | |
104 | QemuOpts *opts; | |
105 | char buf[32]; | |
106 | ||
107 | opts = drive_def(optstr); | |
108 | if (!opts) { | |
109 | return NULL; | |
110 | } | |
111 | if (type != IF_DEFAULT) { | |
112 | qemu_opt_set(opts, "if", if_name[type]); | |
113 | } | |
114 | if (index >= 0) { | |
115 | snprintf(buf, sizeof(buf), "%d", index); | |
116 | qemu_opt_set(opts, "index", buf); | |
117 | } | |
118 | if (file) | |
119 | qemu_opt_set(opts, "file", file); | |
120 | return opts; | |
121 | } | |
122 | ||
123 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
124 | { | |
125 | DriveInfo *dinfo; | |
126 | ||
127 | /* seek interface, bus and unit */ | |
128 | ||
129 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
130 | if (dinfo->type == type && | |
131 | dinfo->bus == bus && | |
132 | dinfo->unit == unit) | |
133 | return dinfo; | |
134 | } | |
135 | ||
136 | return NULL; | |
137 | } | |
138 | ||
139 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) | |
140 | { | |
141 | return drive_get(type, | |
142 | drive_index_to_bus_id(type, index), | |
143 | drive_index_to_unit_id(type, index)); | |
144 | } | |
145 | ||
146 | int drive_get_max_bus(BlockInterfaceType type) | |
147 | { | |
148 | int max_bus; | |
149 | DriveInfo *dinfo; | |
150 | ||
151 | max_bus = -1; | |
152 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
153 | if(dinfo->type == type && | |
154 | dinfo->bus > max_bus) | |
155 | max_bus = dinfo->bus; | |
156 | } | |
157 | return max_bus; | |
158 | } | |
159 | ||
160 | /* Get a block device. This should only be used for single-drive devices | |
161 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
162 | appropriate bus. */ | |
163 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
164 | { | |
165 | static int next_block_unit[IF_COUNT]; | |
166 | ||
167 | return drive_get(type, 0, next_block_unit[type]++); | |
168 | } | |
169 | ||
170 | DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) | |
171 | { | |
172 | DriveInfo *dinfo; | |
173 | ||
174 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
175 | if (dinfo->bdrv == bs) { | |
176 | return dinfo; | |
177 | } | |
178 | } | |
179 | return NULL; | |
180 | } | |
181 | ||
182 | static void bdrv_format_print(void *opaque, const char *name) | |
183 | { | |
184 | error_printf(" %s", name); | |
185 | } | |
186 | ||
187 | static void drive_uninit(DriveInfo *dinfo) | |
188 | { | |
189 | qemu_opts_del(dinfo->opts); | |
190 | bdrv_delete(dinfo->bdrv); | |
191 | g_free(dinfo->id); | |
192 | QTAILQ_REMOVE(&drives, dinfo, next); | |
193 | g_free(dinfo); | |
194 | } | |
195 | ||
196 | void drive_put_ref(DriveInfo *dinfo) | |
197 | { | |
198 | assert(dinfo->refcount); | |
199 | if (--dinfo->refcount == 0) { | |
200 | drive_uninit(dinfo); | |
201 | } | |
202 | } | |
203 | ||
204 | void drive_get_ref(DriveInfo *dinfo) | |
205 | { | |
206 | dinfo->refcount++; | |
207 | } | |
208 | ||
209 | typedef struct { | |
210 | QEMUBH *bh; | |
211 | DriveInfo *dinfo; | |
212 | } DrivePutRefBH; | |
213 | ||
214 | static void drive_put_ref_bh(void *opaque) | |
215 | { | |
216 | DrivePutRefBH *s = opaque; | |
217 | ||
218 | drive_put_ref(s->dinfo); | |
219 | qemu_bh_delete(s->bh); | |
220 | g_free(s); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Release a drive reference in a BH | |
225 | * | |
226 | * It is not possible to use drive_put_ref() from a callback function when the | |
227 | * callers still need the drive. In such cases we schedule a BH to release the | |
228 | * reference. | |
229 | */ | |
230 | static void drive_put_ref_bh_schedule(DriveInfo *dinfo) | |
231 | { | |
232 | DrivePutRefBH *s; | |
233 | ||
234 | s = g_new(DrivePutRefBH, 1); | |
235 | s->bh = qemu_bh_new(drive_put_ref_bh, s); | |
236 | s->dinfo = dinfo; | |
237 | qemu_bh_schedule(s->bh); | |
238 | } | |
239 | ||
240 | static int parse_block_error_action(const char *buf, int is_read) | |
241 | { | |
242 | if (!strcmp(buf, "ignore")) { | |
243 | return BLOCK_ERR_IGNORE; | |
244 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
245 | return BLOCK_ERR_STOP_ENOSPC; | |
246 | } else if (!strcmp(buf, "stop")) { | |
247 | return BLOCK_ERR_STOP_ANY; | |
248 | } else if (!strcmp(buf, "report")) { | |
249 | return BLOCK_ERR_REPORT; | |
250 | } else { | |
251 | error_report("'%s' invalid %s error action", | |
252 | buf, is_read ? "read" : "write"); | |
253 | return -1; | |
254 | } | |
255 | } | |
256 | ||
257 | static bool do_check_io_limits(BlockIOLimit *io_limits) | |
258 | { | |
259 | bool bps_flag; | |
260 | bool iops_flag; | |
261 | ||
262 | assert(io_limits); | |
263 | ||
264 | bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0) | |
265 | && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0) | |
266 | || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0)); | |
267 | iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0) | |
268 | && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0) | |
269 | || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0)); | |
270 | if (bps_flag || iops_flag) { | |
271 | return false; | |
272 | } | |
273 | ||
274 | return true; | |
275 | } | |
276 | ||
277 | DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi) | |
278 | { | |
279 | const char *buf; | |
280 | const char *file = NULL; | |
281 | char devname[128]; | |
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 | pstrcpy(devname, sizeof(devname), buf); | |
322 | for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) | |
323 | ; | |
324 | if (type == IF_COUNT) { | |
325 | error_report("unsupported bus type '%s'", buf); | |
326 | return NULL; | |
327 | } | |
328 | } else { | |
329 | type = default_to_scsi ? IF_SCSI : IF_IDE; | |
330 | pstrcpy(devname, sizeof(devname), if_name[type]); | |
331 | } | |
332 | ||
333 | max_devs = if_max_devs[type]; | |
334 | ||
335 | if (cyls || heads || secs) { | |
336 | if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { | |
337 | error_report("invalid physical cyls number"); | |
338 | return NULL; | |
339 | } | |
340 | if (heads < 1 || (type == IF_IDE && heads > 16)) { | |
341 | error_report("invalid physical heads number"); | |
342 | return NULL; | |
343 | } | |
344 | if (secs < 1 || (type == IF_IDE && secs > 63)) { | |
345 | error_report("invalid physical secs number"); | |
346 | return NULL; | |
347 | } | |
348 | } | |
349 | ||
350 | if ((buf = qemu_opt_get(opts, "trans")) != NULL) { | |
351 | if (!cyls) { | |
352 | error_report("'%s' trans must be used with cyls, heads and secs", | |
353 | buf); | |
354 | return NULL; | |
355 | } | |
356 | if (!strcmp(buf, "none")) | |
357 | translation = BIOS_ATA_TRANSLATION_NONE; | |
358 | else if (!strcmp(buf, "lba")) | |
359 | translation = BIOS_ATA_TRANSLATION_LBA; | |
360 | else if (!strcmp(buf, "auto")) | |
361 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
362 | else { | |
363 | error_report("'%s' invalid translation type", buf); | |
364 | return NULL; | |
365 | } | |
366 | } | |
367 | ||
368 | if ((buf = qemu_opt_get(opts, "media")) != NULL) { | |
369 | if (!strcmp(buf, "disk")) { | |
370 | media = MEDIA_DISK; | |
371 | } else if (!strcmp(buf, "cdrom")) { | |
372 | if (cyls || secs || heads) { | |
373 | error_report("CHS can't be set with media=%s", buf); | |
374 | return NULL; | |
375 | } | |
376 | media = MEDIA_CDROM; | |
377 | } else { | |
378 | error_report("'%s' invalid media", buf); | |
379 | return NULL; | |
380 | } | |
381 | } | |
382 | ||
383 | if ((buf = qemu_opt_get(opts, "cache")) != NULL) { | |
384 | if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { | |
385 | error_report("invalid cache option"); | |
386 | return NULL; | |
387 | } | |
388 | } | |
389 | ||
390 | #ifdef CONFIG_LINUX_AIO | |
391 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
392 | if (!strcmp(buf, "native")) { | |
393 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
394 | } else if (!strcmp(buf, "threads")) { | |
395 | /* this is the default */ | |
396 | } else { | |
397 | error_report("invalid aio option"); | |
398 | return NULL; | |
399 | } | |
400 | } | |
401 | #endif | |
402 | ||
403 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
404 | if (strcmp(buf, "?") == 0) { | |
405 | error_printf("Supported formats:"); | |
406 | bdrv_iterate_format(bdrv_format_print, NULL); | |
407 | error_printf("\n"); | |
408 | return NULL; | |
409 | } | |
410 | drv = bdrv_find_whitelisted_format(buf); | |
411 | if (!drv) { | |
412 | error_report("'%s' invalid format", buf); | |
413 | return NULL; | |
414 | } | |
415 | } | |
416 | ||
417 | /* disk I/O throttling */ | |
418 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = | |
419 | qemu_opt_get_number(opts, "bps", 0); | |
420 | io_limits.bps[BLOCK_IO_LIMIT_READ] = | |
421 | qemu_opt_get_number(opts, "bps_rd", 0); | |
422 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = | |
423 | qemu_opt_get_number(opts, "bps_wr", 0); | |
424 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = | |
425 | qemu_opt_get_number(opts, "iops", 0); | |
426 | io_limits.iops[BLOCK_IO_LIMIT_READ] = | |
427 | qemu_opt_get_number(opts, "iops_rd", 0); | |
428 | io_limits.iops[BLOCK_IO_LIMIT_WRITE] = | |
429 | qemu_opt_get_number(opts, "iops_wr", 0); | |
430 | ||
431 | if (!do_check_io_limits(&io_limits)) { | |
432 | error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " | |
433 | "cannot be used at the same time"); | |
434 | return NULL; | |
435 | } | |
436 | ||
437 | on_write_error = BLOCK_ERR_STOP_ENOSPC; | |
438 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
439 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { | |
440 | error_report("werror is not supported by this bus type"); | |
441 | return NULL; | |
442 | } | |
443 | ||
444 | on_write_error = parse_block_error_action(buf, 0); | |
445 | if (on_write_error < 0) { | |
446 | return NULL; | |
447 | } | |
448 | } | |
449 | ||
450 | on_read_error = BLOCK_ERR_REPORT; | |
451 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
452 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) { | |
453 | error_report("rerror is not supported by this bus type"); | |
454 | return NULL; | |
455 | } | |
456 | ||
457 | on_read_error = parse_block_error_action(buf, 1); | |
458 | if (on_read_error < 0) { | |
459 | return NULL; | |
460 | } | |
461 | } | |
462 | ||
463 | if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { | |
464 | if (type != IF_VIRTIO) { | |
465 | error_report("addr is not supported by this bus type"); | |
466 | return NULL; | |
467 | } | |
468 | } | |
469 | ||
470 | /* compute bus and unit according index */ | |
471 | ||
472 | if (index != -1) { | |
473 | if (bus_id != 0 || unit_id != -1) { | |
474 | error_report("index cannot be used with bus and unit"); | |
475 | return NULL; | |
476 | } | |
477 | bus_id = drive_index_to_bus_id(type, index); | |
478 | unit_id = drive_index_to_unit_id(type, index); | |
479 | } | |
480 | ||
481 | /* if user doesn't specify a unit_id, | |
482 | * try to find the first free | |
483 | */ | |
484 | ||
485 | if (unit_id == -1) { | |
486 | unit_id = 0; | |
487 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
488 | unit_id++; | |
489 | if (max_devs && unit_id >= max_devs) { | |
490 | unit_id -= max_devs; | |
491 | bus_id++; | |
492 | } | |
493 | } | |
494 | } | |
495 | ||
496 | /* check unit id */ | |
497 | ||
498 | if (max_devs && unit_id >= max_devs) { | |
499 | error_report("unit %d too big (max is %d)", | |
500 | unit_id, max_devs - 1); | |
501 | return NULL; | |
502 | } | |
503 | ||
504 | /* | |
505 | * catch multiple definitions | |
506 | */ | |
507 | ||
508 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
509 | error_report("drive with bus=%d, unit=%d (index=%d) exists", | |
510 | bus_id, unit_id, index); | |
511 | return NULL; | |
512 | } | |
513 | ||
514 | /* init */ | |
515 | ||
516 | dinfo = g_malloc0(sizeof(*dinfo)); | |
517 | if ((buf = qemu_opts_id(opts)) != NULL) { | |
518 | dinfo->id = g_strdup(buf); | |
519 | } else { | |
520 | /* no id supplied -> create one */ | |
521 | dinfo->id = g_malloc0(32); | |
522 | if (type == IF_IDE || type == IF_SCSI) | |
523 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
524 | if (max_devs) | |
525 | snprintf(dinfo->id, 32, "%s%i%s%i", | |
526 | devname, bus_id, mediastr, unit_id); | |
527 | else | |
528 | snprintf(dinfo->id, 32, "%s%s%i", | |
529 | devname, mediastr, unit_id); | |
530 | } | |
531 | dinfo->bdrv = bdrv_new(dinfo->id); | |
532 | dinfo->devaddr = devaddr; | |
533 | dinfo->type = type; | |
534 | dinfo->bus = bus_id; | |
535 | dinfo->unit = unit_id; | |
536 | dinfo->opts = opts; | |
537 | dinfo->refcount = 1; | |
538 | if (serial) { | |
539 | pstrcpy(dinfo->serial, sizeof(dinfo->serial), serial); | |
540 | } | |
541 | QTAILQ_INSERT_TAIL(&drives, dinfo, next); | |
542 | ||
543 | bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); | |
544 | ||
545 | /* disk I/O throttling */ | |
546 | bdrv_set_io_limits(dinfo->bdrv, &io_limits); | |
547 | ||
548 | switch(type) { | |
549 | case IF_IDE: | |
550 | case IF_SCSI: | |
551 | case IF_XEN: | |
552 | case IF_NONE: | |
553 | switch(media) { | |
554 | case MEDIA_DISK: | |
555 | if (cyls != 0) { | |
556 | bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); | |
557 | bdrv_set_translation_hint(dinfo->bdrv, translation); | |
558 | } | |
559 | break; | |
560 | case MEDIA_CDROM: | |
561 | dinfo->media_cd = 1; | |
562 | break; | |
563 | } | |
564 | break; | |
565 | case IF_SD: | |
566 | case IF_FLOPPY: | |
567 | case IF_PFLASH: | |
568 | case IF_MTD: | |
569 | break; | |
570 | case IF_VIRTIO: | |
571 | /* add virtio block device */ | |
572 | opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); | |
573 | if (arch_type == QEMU_ARCH_S390X) { | |
574 | qemu_opt_set(opts, "driver", "virtio-blk-s390"); | |
575 | } else { | |
576 | qemu_opt_set(opts, "driver", "virtio-blk-pci"); | |
577 | } | |
578 | qemu_opt_set(opts, "drive", dinfo->id); | |
579 | if (devaddr) | |
580 | qemu_opt_set(opts, "addr", devaddr); | |
581 | break; | |
582 | default: | |
583 | abort(); | |
584 | } | |
585 | if (!file || !*file) { | |
586 | return dinfo; | |
587 | } | |
588 | if (snapshot) { | |
589 | /* always use cache=unsafe with snapshot */ | |
590 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
591 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
592 | } | |
593 | ||
594 | if (copy_on_read) { | |
595 | bdrv_flags |= BDRV_O_COPY_ON_READ; | |
596 | } | |
597 | ||
598 | if (runstate_check(RUN_STATE_INMIGRATE)) { | |
599 | bdrv_flags |= BDRV_O_INCOMING; | |
600 | } | |
601 | ||
602 | if (media == MEDIA_CDROM) { | |
603 | /* CDROM is fine for any interface, don't check. */ | |
604 | ro = 1; | |
605 | } else if (ro == 1) { | |
606 | if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && | |
607 | type != IF_NONE && type != IF_PFLASH) { | |
608 | error_report("readonly not supported by this bus type"); | |
609 | goto err; | |
610 | } | |
611 | } | |
612 | ||
613 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; | |
614 | ||
615 | ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); | |
616 | if (ret < 0) { | |
617 | error_report("could not open disk image %s: %s", | |
618 | file, strerror(-ret)); | |
619 | goto err; | |
620 | } | |
621 | ||
622 | if (bdrv_key_required(dinfo->bdrv)) | |
623 | autostart = 0; | |
624 | return dinfo; | |
625 | ||
626 | err: | |
627 | bdrv_delete(dinfo->bdrv); | |
628 | g_free(dinfo->id); | |
629 | QTAILQ_REMOVE(&drives, dinfo, next); | |
630 | g_free(dinfo); | |
631 | return NULL; | |
632 | } | |
633 | ||
634 | void do_commit(Monitor *mon, const QDict *qdict) | |
635 | { | |
636 | const char *device = qdict_get_str(qdict, "device"); | |
637 | BlockDriverState *bs; | |
638 | int ret; | |
639 | ||
640 | if (!strcmp(device, "all")) { | |
641 | ret = bdrv_commit_all(); | |
642 | if (ret == -EBUSY) { | |
643 | qerror_report(QERR_DEVICE_IN_USE, device); | |
644 | return; | |
645 | } | |
646 | } else { | |
647 | bs = bdrv_find(device); | |
648 | if (!bs) { | |
649 | qerror_report(QERR_DEVICE_NOT_FOUND, device); | |
650 | return; | |
651 | } | |
652 | ret = bdrv_commit(bs); | |
653 | if (ret == -EBUSY) { | |
654 | qerror_report(QERR_DEVICE_IN_USE, device); | |
655 | return; | |
656 | } | |
657 | } | |
658 | } | |
659 | ||
660 | static void blockdev_do_action(int kind, void *data, Error **errp) | |
661 | { | |
662 | BlockdevAction action; | |
663 | BlockdevActionList list; | |
664 | ||
665 | action.kind = kind; | |
666 | action.data = data; | |
667 | list.value = &action; | |
668 | list.next = NULL; | |
669 | qmp_transaction(&list, errp); | |
670 | } | |
671 | ||
672 | void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, | |
673 | bool has_format, const char *format, | |
674 | bool has_mode, enum NewImageMode mode, | |
675 | Error **errp) | |
676 | { | |
677 | BlockdevSnapshot snapshot = { | |
678 | .device = (char *) device, | |
679 | .snapshot_file = (char *) snapshot_file, | |
680 | .has_format = has_format, | |
681 | .format = (char *) format, | |
682 | .has_mode = has_mode, | |
683 | .mode = mode, | |
684 | }; | |
685 | blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot, | |
686 | errp); | |
687 | } | |
688 | ||
689 | ||
690 | /* New and old BlockDriverState structs for group snapshots */ | |
691 | typedef struct BlkTransactionStates { | |
692 | BlockDriverState *old_bs; | |
693 | BlockDriverState *new_bs; | |
694 | QSIMPLEQ_ENTRY(BlkTransactionStates) entry; | |
695 | } BlkTransactionStates; | |
696 | ||
697 | /* | |
698 | * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail | |
699 | * then we do not pivot any of the devices in the group, and abandon the | |
700 | * snapshots | |
701 | */ | |
702 | void qmp_transaction(BlockdevActionList *dev_list, Error **errp) | |
703 | { | |
704 | int ret = 0; | |
705 | BlockdevActionList *dev_entry = dev_list; | |
706 | BlkTransactionStates *states, *next; | |
707 | ||
708 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states; | |
709 | QSIMPLEQ_INIT(&snap_bdrv_states); | |
710 | ||
711 | /* drain all i/o before any snapshots */ | |
712 | bdrv_drain_all(); | |
713 | ||
714 | /* We don't do anything in this loop that commits us to the snapshot */ | |
715 | while (NULL != dev_entry) { | |
716 | BlockdevAction *dev_info = NULL; | |
717 | BlockDriver *proto_drv; | |
718 | BlockDriver *drv; | |
719 | int flags; | |
720 | enum NewImageMode mode; | |
721 | const char *new_image_file; | |
722 | const char *device; | |
723 | const char *format = "qcow2"; | |
724 | ||
725 | dev_info = dev_entry->value; | |
726 | dev_entry = dev_entry->next; | |
727 | ||
728 | states = g_malloc0(sizeof(BlkTransactionStates)); | |
729 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry); | |
730 | ||
731 | switch (dev_info->kind) { | |
732 | case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
733 | device = dev_info->blockdev_snapshot_sync->device; | |
734 | if (!dev_info->blockdev_snapshot_sync->has_mode) { | |
735 | dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
736 | } | |
737 | new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file; | |
738 | if (dev_info->blockdev_snapshot_sync->has_format) { | |
739 | format = dev_info->blockdev_snapshot_sync->format; | |
740 | } | |
741 | mode = dev_info->blockdev_snapshot_sync->mode; | |
742 | break; | |
743 | default: | |
744 | abort(); | |
745 | } | |
746 | ||
747 | drv = bdrv_find_format(format); | |
748 | if (!drv) { | |
749 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
750 | goto delete_and_fail; | |
751 | } | |
752 | ||
753 | states->old_bs = bdrv_find(device); | |
754 | if (!states->old_bs) { | |
755 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
756 | goto delete_and_fail; | |
757 | } | |
758 | ||
759 | if (bdrv_in_use(states->old_bs)) { | |
760 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
761 | goto delete_and_fail; | |
762 | } | |
763 | ||
764 | if (!bdrv_is_read_only(states->old_bs) && | |
765 | bdrv_is_inserted(states->old_bs)) { | |
766 | ||
767 | if (bdrv_flush(states->old_bs)) { | |
768 | error_set(errp, QERR_IO_ERROR); | |
769 | goto delete_and_fail; | |
770 | } | |
771 | } | |
772 | ||
773 | flags = states->old_bs->open_flags; | |
774 | ||
775 | proto_drv = bdrv_find_protocol(new_image_file); | |
776 | if (!proto_drv) { | |
777 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
778 | goto delete_and_fail; | |
779 | } | |
780 | ||
781 | /* create new image w/backing file */ | |
782 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
783 | ret = bdrv_img_create(new_image_file, format, | |
784 | states->old_bs->filename, | |
785 | states->old_bs->drv->format_name, | |
786 | NULL, -1, flags); | |
787 | if (ret) { | |
788 | error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); | |
789 | goto delete_and_fail; | |
790 | } | |
791 | } | |
792 | ||
793 | /* We will manually add the backing_hd field to the bs later */ | |
794 | states->new_bs = bdrv_new(""); | |
795 | ret = bdrv_open(states->new_bs, new_image_file, | |
796 | flags | BDRV_O_NO_BACKING, drv); | |
797 | if (ret != 0) { | |
798 | error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); | |
799 | goto delete_and_fail; | |
800 | } | |
801 | } | |
802 | ||
803 | ||
804 | /* Now we are going to do the actual pivot. Everything up to this point | |
805 | * is reversible, but we are committed at this point */ | |
806 | QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { | |
807 | /* This removes our old bs from the bdrv_states, and adds the new bs */ | |
808 | bdrv_append(states->new_bs, states->old_bs); | |
809 | } | |
810 | ||
811 | /* success */ | |
812 | goto exit; | |
813 | ||
814 | delete_and_fail: | |
815 | /* | |
816 | * failure, and it is all-or-none; abandon each new bs, and keep using | |
817 | * the original bs for all images | |
818 | */ | |
819 | QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { | |
820 | if (states->new_bs) { | |
821 | bdrv_delete(states->new_bs); | |
822 | } | |
823 | } | |
824 | exit: | |
825 | QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) { | |
826 | g_free(states); | |
827 | } | |
828 | return; | |
829 | } | |
830 | ||
831 | ||
832 | static void eject_device(BlockDriverState *bs, int force, Error **errp) | |
833 | { | |
834 | if (bdrv_in_use(bs)) { | |
835 | error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); | |
836 | return; | |
837 | } | |
838 | if (!bdrv_dev_has_removable_media(bs)) { | |
839 | error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); | |
840 | return; | |
841 | } | |
842 | ||
843 | if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { | |
844 | bdrv_dev_eject_request(bs, force); | |
845 | if (!force) { | |
846 | error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); | |
847 | return; | |
848 | } | |
849 | } | |
850 | ||
851 | bdrv_close(bs); | |
852 | } | |
853 | ||
854 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) | |
855 | { | |
856 | BlockDriverState *bs; | |
857 | ||
858 | bs = bdrv_find(device); | |
859 | if (!bs) { | |
860 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
861 | return; | |
862 | } | |
863 | ||
864 | eject_device(bs, force, errp); | |
865 | } | |
866 | ||
867 | void qmp_block_passwd(const char *device, const char *password, Error **errp) | |
868 | { | |
869 | BlockDriverState *bs; | |
870 | int err; | |
871 | ||
872 | bs = bdrv_find(device); | |
873 | if (!bs) { | |
874 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
875 | return; | |
876 | } | |
877 | ||
878 | err = bdrv_set_key(bs, password); | |
879 | if (err == -EINVAL) { | |
880 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
881 | return; | |
882 | } else if (err < 0) { | |
883 | error_set(errp, QERR_INVALID_PASSWORD); | |
884 | return; | |
885 | } | |
886 | } | |
887 | ||
888 | static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, | |
889 | int bdrv_flags, BlockDriver *drv, | |
890 | const char *password, Error **errp) | |
891 | { | |
892 | if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { | |
893 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
894 | return; | |
895 | } | |
896 | ||
897 | if (bdrv_key_required(bs)) { | |
898 | if (password) { | |
899 | if (bdrv_set_key(bs, password) < 0) { | |
900 | error_set(errp, QERR_INVALID_PASSWORD); | |
901 | } | |
902 | } else { | |
903 | error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), | |
904 | bdrv_get_encrypted_filename(bs)); | |
905 | } | |
906 | } else if (password) { | |
907 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
908 | } | |
909 | } | |
910 | ||
911 | void qmp_change_blockdev(const char *device, const char *filename, | |
912 | bool has_format, const char *format, Error **errp) | |
913 | { | |
914 | BlockDriverState *bs; | |
915 | BlockDriver *drv = NULL; | |
916 | int bdrv_flags; | |
917 | Error *err = NULL; | |
918 | ||
919 | bs = bdrv_find(device); | |
920 | if (!bs) { | |
921 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
922 | return; | |
923 | } | |
924 | ||
925 | if (format) { | |
926 | drv = bdrv_find_whitelisted_format(format); | |
927 | if (!drv) { | |
928 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
929 | return; | |
930 | } | |
931 | } | |
932 | ||
933 | eject_device(bs, 0, &err); | |
934 | if (error_is_set(&err)) { | |
935 | error_propagate(errp, err); | |
936 | return; | |
937 | } | |
938 | ||
939 | bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; | |
940 | bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; | |
941 | ||
942 | qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); | |
943 | } | |
944 | ||
945 | /* throttling disk I/O limits */ | |
946 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, | |
947 | int64_t bps_wr, int64_t iops, int64_t iops_rd, | |
948 | int64_t iops_wr, Error **errp) | |
949 | { | |
950 | BlockIOLimit io_limits; | |
951 | BlockDriverState *bs; | |
952 | ||
953 | bs = bdrv_find(device); | |
954 | if (!bs) { | |
955 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
956 | return; | |
957 | } | |
958 | ||
959 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; | |
960 | io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; | |
961 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; | |
962 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; | |
963 | io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; | |
964 | io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; | |
965 | ||
966 | if (!do_check_io_limits(&io_limits)) { | |
967 | error_set(errp, QERR_INVALID_PARAMETER_COMBINATION); | |
968 | return; | |
969 | } | |
970 | ||
971 | bs->io_limits = io_limits; | |
972 | bs->slice_time = BLOCK_IO_SLICE_TIME; | |
973 | ||
974 | if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { | |
975 | bdrv_io_limits_enable(bs); | |
976 | } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { | |
977 | bdrv_io_limits_disable(bs); | |
978 | } else { | |
979 | if (bs->block_timer) { | |
980 | qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); | |
981 | } | |
982 | } | |
983 | } | |
984 | ||
985 | int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) | |
986 | { | |
987 | const char *id = qdict_get_str(qdict, "id"); | |
988 | BlockDriverState *bs; | |
989 | ||
990 | bs = bdrv_find(id); | |
991 | if (!bs) { | |
992 | qerror_report(QERR_DEVICE_NOT_FOUND, id); | |
993 | return -1; | |
994 | } | |
995 | if (bdrv_in_use(bs)) { | |
996 | qerror_report(QERR_DEVICE_IN_USE, id); | |
997 | return -1; | |
998 | } | |
999 | ||
1000 | /* quiesce block driver; prevent further io */ | |
1001 | bdrv_drain_all(); | |
1002 | bdrv_flush(bs); | |
1003 | bdrv_close(bs); | |
1004 | ||
1005 | /* if we have a device attached to this BlockDriverState | |
1006 | * then we need to make the drive anonymous until the device | |
1007 | * can be removed. If this is a drive with no device backing | |
1008 | * then we can just get rid of the block driver state right here. | |
1009 | */ | |
1010 | if (bdrv_get_attached_dev(bs)) { | |
1011 | bdrv_make_anon(bs); | |
1012 | } else { | |
1013 | drive_uninit(drive_get_by_blockdev(bs)); | |
1014 | } | |
1015 | ||
1016 | return 0; | |
1017 | } | |
1018 | ||
1019 | void qmp_block_resize(const char *device, int64_t size, Error **errp) | |
1020 | { | |
1021 | BlockDriverState *bs; | |
1022 | ||
1023 | bs = bdrv_find(device); | |
1024 | if (!bs) { | |
1025 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1026 | return; | |
1027 | } | |
1028 | ||
1029 | if (size < 0) { | |
1030 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); | |
1031 | return; | |
1032 | } | |
1033 | ||
1034 | switch (bdrv_truncate(bs, size)) { | |
1035 | case 0: | |
1036 | break; | |
1037 | case -ENOMEDIUM: | |
1038 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1039 | break; | |
1040 | case -ENOTSUP: | |
1041 | error_set(errp, QERR_UNSUPPORTED); | |
1042 | break; | |
1043 | case -EACCES: | |
1044 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1045 | break; | |
1046 | case -EBUSY: | |
1047 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1048 | break; | |
1049 | default: | |
1050 | error_set(errp, QERR_UNDEFINED_ERROR); | |
1051 | break; | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | static QObject *qobject_from_block_job(BlockJob *job) | |
1056 | { | |
1057 | return qobject_from_jsonf("{ 'type': %s," | |
1058 | "'device': %s," | |
1059 | "'len': %" PRId64 "," | |
1060 | "'offset': %" PRId64 "," | |
1061 | "'speed': %" PRId64 " }", | |
1062 | job->job_type->job_type, | |
1063 | bdrv_get_device_name(job->bs), | |
1064 | job->len, | |
1065 | job->offset, | |
1066 | job->speed); | |
1067 | } | |
1068 | ||
1069 | static void block_stream_cb(void *opaque, int ret) | |
1070 | { | |
1071 | BlockDriverState *bs = opaque; | |
1072 | QObject *obj; | |
1073 | ||
1074 | trace_block_stream_cb(bs, bs->job, ret); | |
1075 | ||
1076 | assert(bs->job); | |
1077 | obj = qobject_from_block_job(bs->job); | |
1078 | if (ret < 0) { | |
1079 | QDict *dict = qobject_to_qdict(obj); | |
1080 | qdict_put(dict, "error", qstring_from_str(strerror(-ret))); | |
1081 | } | |
1082 | ||
1083 | if (block_job_is_cancelled(bs->job)) { | |
1084 | monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); | |
1085 | } else { | |
1086 | monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); | |
1087 | } | |
1088 | qobject_decref(obj); | |
1089 | ||
1090 | drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); | |
1091 | } | |
1092 | ||
1093 | void qmp_block_stream(const char *device, bool has_base, | |
1094 | const char *base, bool has_speed, | |
1095 | int64_t speed, Error **errp) | |
1096 | { | |
1097 | BlockDriverState *bs; | |
1098 | BlockDriverState *base_bs = NULL; | |
1099 | Error *local_err = NULL; | |
1100 | ||
1101 | bs = bdrv_find(device); | |
1102 | if (!bs) { | |
1103 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1104 | return; | |
1105 | } | |
1106 | ||
1107 | if (base) { | |
1108 | base_bs = bdrv_find_backing_image(bs, base); | |
1109 | if (base_bs == NULL) { | |
1110 | error_set(errp, QERR_BASE_NOT_FOUND, base); | |
1111 | return; | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | stream_start(bs, base_bs, base, has_speed ? speed : 0, | |
1116 | block_stream_cb, bs, &local_err); | |
1117 | if (error_is_set(&local_err)) { | |
1118 | error_propagate(errp, local_err); | |
1119 | return; | |
1120 | } | |
1121 | ||
1122 | /* Grab a reference so hotplug does not delete the BlockDriverState from | |
1123 | * underneath us. | |
1124 | */ | |
1125 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1126 | ||
1127 | trace_qmp_block_stream(bs, bs->job); | |
1128 | } | |
1129 | ||
1130 | static BlockJob *find_block_job(const char *device) | |
1131 | { | |
1132 | BlockDriverState *bs; | |
1133 | ||
1134 | bs = bdrv_find(device); | |
1135 | if (!bs || !bs->job) { | |
1136 | return NULL; | |
1137 | } | |
1138 | return bs->job; | |
1139 | } | |
1140 | ||
1141 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) | |
1142 | { | |
1143 | BlockJob *job = find_block_job(device); | |
1144 | ||
1145 | if (!job) { | |
1146 | error_set(errp, QERR_DEVICE_NOT_ACTIVE, device); | |
1147 | return; | |
1148 | } | |
1149 | ||
1150 | block_job_set_speed(job, speed, errp); | |
1151 | } | |
1152 | ||
1153 | void qmp_block_job_cancel(const char *device, Error **errp) | |
1154 | { | |
1155 | BlockJob *job = find_block_job(device); | |
1156 | ||
1157 | if (!job) { | |
1158 | error_set(errp, QERR_DEVICE_NOT_ACTIVE, device); | |
1159 | return; | |
1160 | } | |
1161 | ||
1162 | trace_qmp_block_job_cancel(job); | |
1163 | block_job_cancel(job); | |
1164 | } | |
1165 | ||
1166 | static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) | |
1167 | { | |
1168 | BlockJobInfoList **prev = opaque; | |
1169 | BlockJob *job = bs->job; | |
1170 | ||
1171 | if (job) { | |
1172 | BlockJobInfoList *elem; | |
1173 | BlockJobInfo *info = g_new(BlockJobInfo, 1); | |
1174 | *info = (BlockJobInfo){ | |
1175 | .type = g_strdup(job->job_type->job_type), | |
1176 | .device = g_strdup(bdrv_get_device_name(bs)), | |
1177 | .len = job->len, | |
1178 | .offset = job->offset, | |
1179 | .speed = job->speed, | |
1180 | }; | |
1181 | ||
1182 | elem = g_new0(BlockJobInfoList, 1); | |
1183 | elem->value = info; | |
1184 | ||
1185 | (*prev)->next = elem; | |
1186 | *prev = elem; | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
1191 | { | |
1192 | /* Dummy is a fake list element for holding the head pointer */ | |
1193 | BlockJobInfoList dummy = {}; | |
1194 | BlockJobInfoList *prev = &dummy; | |
1195 | bdrv_iterate(do_qmp_query_block_jobs_one, &prev); | |
1196 | return dummy.next; | |
1197 | } |