root / blockdev.c @ 2d3999fe
History | View | Annotate | Download (20.9 kB)
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 "sysemu.h" |
17 |
#include "hw/qdev.h" |
18 |
#include "block_int.h" |
19 |
|
20 |
static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
|
21 |
|
22 |
static const char *const if_name[IF_COUNT] = { |
23 |
[IF_NONE] = "none",
|
24 |
[IF_IDE] = "ide",
|
25 |
[IF_SCSI] = "scsi",
|
26 |
[IF_FLOPPY] = "floppy",
|
27 |
[IF_PFLASH] = "pflash",
|
28 |
[IF_MTD] = "mtd",
|
29 |
[IF_SD] = "sd",
|
30 |
[IF_VIRTIO] = "virtio",
|
31 |
[IF_XEN] = "xen",
|
32 |
}; |
33 |
|
34 |
static const int if_max_devs[IF_COUNT] = { |
35 |
/*
|
36 |
* Do not change these numbers! They govern how drive option
|
37 |
* index maps to unit and bus. That mapping is ABI.
|
38 |
*
|
39 |
* All controllers used to imlement if=T drives need to support
|
40 |
* if_max_devs[T] units, for any T with if_max_devs[T] != 0.
|
41 |
* Otherwise, some index values map to "impossible" bus, unit
|
42 |
* values.
|
43 |
*
|
44 |
* For instance, if you change [IF_SCSI] to 255, -drive
|
45 |
* if=scsi,index=12 no longer means bus=1,unit=5, but
|
46 |
* bus=0,unit=12. With an lsi53c895a controller (7 units max),
|
47 |
* the drive can't be set up. Regression.
|
48 |
*/
|
49 |
[IF_IDE] = 2,
|
50 |
[IF_SCSI] = 7,
|
51 |
}; |
52 |
|
53 |
/*
|
54 |
* We automatically delete the drive when a device using it gets
|
55 |
* unplugged. Questionable feature, but we can't just drop it.
|
56 |
* Device models call blockdev_mark_auto_del() to schedule the
|
57 |
* automatic deletion, and generic qdev code calls blockdev_auto_del()
|
58 |
* when deletion is actually safe.
|
59 |
*/
|
60 |
void blockdev_mark_auto_del(BlockDriverState *bs)
|
61 |
{ |
62 |
DriveInfo *dinfo = drive_get_by_blockdev(bs); |
63 |
|
64 |
if (dinfo) {
|
65 |
dinfo->auto_del = 1;
|
66 |
} |
67 |
} |
68 |
|
69 |
void blockdev_auto_del(BlockDriverState *bs)
|
70 |
{ |
71 |
DriveInfo *dinfo = drive_get_by_blockdev(bs); |
72 |
|
73 |
if (dinfo && dinfo->auto_del) {
|
74 |
drive_put_ref(dinfo); |
75 |
} |
76 |
} |
77 |
|
78 |
static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
79 |
{ |
80 |
int max_devs = if_max_devs[type];
|
81 |
return max_devs ? index / max_devs : 0; |
82 |
} |
83 |
|
84 |
static int drive_index_to_unit_id(BlockInterfaceType type, int index) |
85 |
{ |
86 |
int max_devs = if_max_devs[type];
|
87 |
return max_devs ? index % max_devs : index;
|
88 |
} |
89 |
|
90 |
QemuOpts *drive_def(const char *optstr) |
91 |
{ |
92 |
return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); |
93 |
} |
94 |
|
95 |
QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
96 |
const char *optstr) |
97 |
{ |
98 |
QemuOpts *opts; |
99 |
char buf[32]; |
100 |
|
101 |
opts = drive_def(optstr); |
102 |
if (!opts) {
|
103 |
return NULL; |
104 |
} |
105 |
if (type != IF_DEFAULT) {
|
106 |
qemu_opt_set(opts, "if", if_name[type]);
|
107 |
} |
108 |
if (index >= 0) { |
109 |
snprintf(buf, sizeof(buf), "%d", index); |
110 |
qemu_opt_set(opts, "index", buf);
|
111 |
} |
112 |
if (file)
|
113 |
qemu_opt_set(opts, "file", file);
|
114 |
return opts;
|
115 |
} |
116 |
|
117 |
DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) |
118 |
{ |
119 |
DriveInfo *dinfo; |
120 |
|
121 |
/* seek interface, bus and unit */
|
122 |
|
123 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
124 |
if (dinfo->type == type &&
|
125 |
dinfo->bus == bus && |
126 |
dinfo->unit == unit) |
127 |
return dinfo;
|
128 |
} |
129 |
|
130 |
return NULL; |
131 |
} |
132 |
|
133 |
DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
|
134 |
{ |
135 |
return drive_get(type,
|
136 |
drive_index_to_bus_id(type, index), |
137 |
drive_index_to_unit_id(type, index)); |
138 |
} |
139 |
|
140 |
int drive_get_max_bus(BlockInterfaceType type)
|
141 |
{ |
142 |
int max_bus;
|
143 |
DriveInfo *dinfo; |
144 |
|
145 |
max_bus = -1;
|
146 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
147 |
if(dinfo->type == type &&
|
148 |
dinfo->bus > max_bus) |
149 |
max_bus = dinfo->bus; |
150 |
} |
151 |
return max_bus;
|
152 |
} |
153 |
|
154 |
/* Get a block device. This should only be used for single-drive devices
|
155 |
(e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
|
156 |
appropriate bus. */
|
157 |
DriveInfo *drive_get_next(BlockInterfaceType type) |
158 |
{ |
159 |
static int next_block_unit[IF_COUNT]; |
160 |
|
161 |
return drive_get(type, 0, next_block_unit[type]++); |
162 |
} |
163 |
|
164 |
DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) |
165 |
{ |
166 |
DriveInfo *dinfo; |
167 |
|
168 |
QTAILQ_FOREACH(dinfo, &drives, next) { |
169 |
if (dinfo->bdrv == bs) {
|
170 |
return dinfo;
|
171 |
} |
172 |
} |
173 |
return NULL; |
174 |
} |
175 |
|
176 |
static void bdrv_format_print(void *opaque, const char *name) |
177 |
{ |
178 |
error_printf(" %s", name);
|
179 |
} |
180 |
|
181 |
static void drive_uninit(DriveInfo *dinfo) |
182 |
{ |
183 |
qemu_opts_del(dinfo->opts); |
184 |
bdrv_delete(dinfo->bdrv); |
185 |
qemu_free(dinfo->id); |
186 |
QTAILQ_REMOVE(&drives, dinfo, next); |
187 |
qemu_free(dinfo); |
188 |
} |
189 |
|
190 |
void drive_put_ref(DriveInfo *dinfo)
|
191 |
{ |
192 |
assert(dinfo->refcount); |
193 |
if (--dinfo->refcount == 0) { |
194 |
drive_uninit(dinfo); |
195 |
} |
196 |
} |
197 |
|
198 |
void drive_get_ref(DriveInfo *dinfo)
|
199 |
{ |
200 |
dinfo->refcount++; |
201 |
} |
202 |
|
203 |
static int parse_block_error_action(const char *buf, int is_read) |
204 |
{ |
205 |
if (!strcmp(buf, "ignore")) { |
206 |
return BLOCK_ERR_IGNORE;
|
207 |
} else if (!is_read && !strcmp(buf, "enospc")) { |
208 |
return BLOCK_ERR_STOP_ENOSPC;
|
209 |
} else if (!strcmp(buf, "stop")) { |
210 |
return BLOCK_ERR_STOP_ANY;
|
211 |
} else if (!strcmp(buf, "report")) { |
212 |
return BLOCK_ERR_REPORT;
|
213 |
} else {
|
214 |
error_report("'%s' invalid %s error action",
|
215 |
buf, is_read ? "read" : "write"); |
216 |
return -1; |
217 |
} |
218 |
} |
219 |
|
220 |
DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
|
221 |
{ |
222 |
const char *buf; |
223 |
const char *file = NULL; |
224 |
char devname[128]; |
225 |
const char *serial; |
226 |
const char *mediastr = ""; |
227 |
BlockInterfaceType type; |
228 |
enum { MEDIA_DISK, MEDIA_CDROM } media;
|
229 |
int bus_id, unit_id;
|
230 |
int cyls, heads, secs, translation;
|
231 |
BlockDriver *drv = NULL;
|
232 |
int max_devs;
|
233 |
int index;
|
234 |
int ro = 0; |
235 |
int bdrv_flags = 0; |
236 |
int on_read_error, on_write_error;
|
237 |
const char *devaddr; |
238 |
DriveInfo *dinfo; |
239 |
int snapshot = 0; |
240 |
int ret;
|
241 |
|
242 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
243 |
media = MEDIA_DISK; |
244 |
|
245 |
/* extract parameters */
|
246 |
bus_id = qemu_opt_get_number(opts, "bus", 0); |
247 |
unit_id = qemu_opt_get_number(opts, "unit", -1); |
248 |
index = qemu_opt_get_number(opts, "index", -1); |
249 |
|
250 |
cyls = qemu_opt_get_number(opts, "cyls", 0); |
251 |
heads = qemu_opt_get_number(opts, "heads", 0); |
252 |
secs = qemu_opt_get_number(opts, "secs", 0); |
253 |
|
254 |
snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
255 |
ro = qemu_opt_get_bool(opts, "readonly", 0); |
256 |
|
257 |
file = qemu_opt_get(opts, "file");
|
258 |
serial = qemu_opt_get(opts, "serial");
|
259 |
|
260 |
if ((buf = qemu_opt_get(opts, "if")) != NULL) { |
261 |
pstrcpy(devname, sizeof(devname), buf);
|
262 |
for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
263 |
; |
264 |
if (type == IF_COUNT) {
|
265 |
error_report("unsupported bus type '%s'", buf);
|
266 |
return NULL; |
267 |
} |
268 |
} else {
|
269 |
type = default_to_scsi ? IF_SCSI : IF_IDE; |
270 |
pstrcpy(devname, sizeof(devname), if_name[type]);
|
271 |
} |
272 |
|
273 |
max_devs = if_max_devs[type]; |
274 |
|
275 |
if (cyls || heads || secs) {
|
276 |
if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { |
277 |
error_report("invalid physical cyls number");
|
278 |
return NULL; |
279 |
} |
280 |
if (heads < 1 || (type == IF_IDE && heads > 16)) { |
281 |
error_report("invalid physical heads number");
|
282 |
return NULL; |
283 |
} |
284 |
if (secs < 1 || (type == IF_IDE && secs > 63)) { |
285 |
error_report("invalid physical secs number");
|
286 |
return NULL; |
287 |
} |
288 |
} |
289 |
|
290 |
if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
291 |
if (!cyls) {
|
292 |
error_report("'%s' trans must be used with cyls, heads and secs",
|
293 |
buf); |
294 |
return NULL; |
295 |
} |
296 |
if (!strcmp(buf, "none")) |
297 |
translation = BIOS_ATA_TRANSLATION_NONE; |
298 |
else if (!strcmp(buf, "lba")) |
299 |
translation = BIOS_ATA_TRANSLATION_LBA; |
300 |
else if (!strcmp(buf, "auto")) |
301 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
302 |
else {
|
303 |
error_report("'%s' invalid translation type", buf);
|
304 |
return NULL; |
305 |
} |
306 |
} |
307 |
|
308 |
if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
309 |
if (!strcmp(buf, "disk")) { |
310 |
media = MEDIA_DISK; |
311 |
} else if (!strcmp(buf, "cdrom")) { |
312 |
if (cyls || secs || heads) {
|
313 |
error_report("'%s' invalid physical CHS format", buf);
|
314 |
return NULL; |
315 |
} |
316 |
media = MEDIA_CDROM; |
317 |
} else {
|
318 |
error_report("'%s' invalid media", buf);
|
319 |
return NULL; |
320 |
} |
321 |
} |
322 |
|
323 |
if ((buf = qemu_opt_get(opts, "cache")) != NULL) { |
324 |
if (!strcmp(buf, "off") || !strcmp(buf, "none")) { |
325 |
bdrv_flags |= BDRV_O_NOCACHE | BDRV_O_CACHE_WB; |
326 |
} else if (!strcmp(buf, "writeback")) { |
327 |
bdrv_flags |= BDRV_O_CACHE_WB; |
328 |
} else if (!strcmp(buf, "unsafe")) { |
329 |
bdrv_flags |= BDRV_O_CACHE_WB; |
330 |
bdrv_flags |= BDRV_O_NO_FLUSH; |
331 |
} else if (!strcmp(buf, "writethrough")) { |
332 |
/* this is the default */
|
333 |
} else {
|
334 |
error_report("invalid cache option");
|
335 |
return NULL; |
336 |
} |
337 |
} |
338 |
|
339 |
#ifdef CONFIG_LINUX_AIO
|
340 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
341 |
if (!strcmp(buf, "native")) { |
342 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
343 |
} else if (!strcmp(buf, "threads")) { |
344 |
/* this is the default */
|
345 |
} else {
|
346 |
error_report("invalid aio option");
|
347 |
return NULL; |
348 |
} |
349 |
} |
350 |
#endif
|
351 |
|
352 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
353 |
if (strcmp(buf, "?") == 0) { |
354 |
error_printf("Supported formats:");
|
355 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
356 |
error_printf("\n");
|
357 |
return NULL; |
358 |
} |
359 |
drv = bdrv_find_whitelisted_format(buf); |
360 |
if (!drv) {
|
361 |
error_report("'%s' invalid format", buf);
|
362 |
return NULL; |
363 |
} |
364 |
} |
365 |
|
366 |
on_write_error = BLOCK_ERR_STOP_ENOSPC; |
367 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
368 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
369 |
error_report("werror is not supported by this bus type");
|
370 |
return NULL; |
371 |
} |
372 |
|
373 |
on_write_error = parse_block_error_action(buf, 0);
|
374 |
if (on_write_error < 0) { |
375 |
return NULL; |
376 |
} |
377 |
} |
378 |
|
379 |
on_read_error = BLOCK_ERR_REPORT; |
380 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
381 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
382 |
error_report("rerror is not supported by this bus type");
|
383 |
return NULL; |
384 |
} |
385 |
|
386 |
on_read_error = parse_block_error_action(buf, 1);
|
387 |
if (on_read_error < 0) { |
388 |
return NULL; |
389 |
} |
390 |
} |
391 |
|
392 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
393 |
if (type != IF_VIRTIO) {
|
394 |
error_report("addr is not supported by this bus type");
|
395 |
return NULL; |
396 |
} |
397 |
} |
398 |
|
399 |
/* compute bus and unit according index */
|
400 |
|
401 |
if (index != -1) { |
402 |
if (bus_id != 0 || unit_id != -1) { |
403 |
error_report("index cannot be used with bus and unit");
|
404 |
return NULL; |
405 |
} |
406 |
bus_id = drive_index_to_bus_id(type, index); |
407 |
unit_id = drive_index_to_unit_id(type, index); |
408 |
} |
409 |
|
410 |
/* if user doesn't specify a unit_id,
|
411 |
* try to find the first free
|
412 |
*/
|
413 |
|
414 |
if (unit_id == -1) { |
415 |
unit_id = 0;
|
416 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
417 |
unit_id++; |
418 |
if (max_devs && unit_id >= max_devs) {
|
419 |
unit_id -= max_devs; |
420 |
bus_id++; |
421 |
} |
422 |
} |
423 |
} |
424 |
|
425 |
/* check unit id */
|
426 |
|
427 |
if (max_devs && unit_id >= max_devs) {
|
428 |
error_report("unit %d too big (max is %d)",
|
429 |
unit_id, max_devs - 1);
|
430 |
return NULL; |
431 |
} |
432 |
|
433 |
/*
|
434 |
* catch multiple definitions
|
435 |
*/
|
436 |
|
437 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
438 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
439 |
bus_id, unit_id, index); |
440 |
return NULL; |
441 |
} |
442 |
|
443 |
/* init */
|
444 |
|
445 |
dinfo = qemu_mallocz(sizeof(*dinfo));
|
446 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
447 |
dinfo->id = qemu_strdup(buf); |
448 |
} else {
|
449 |
/* no id supplied -> create one */
|
450 |
dinfo->id = qemu_mallocz(32);
|
451 |
if (type == IF_IDE || type == IF_SCSI)
|
452 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
453 |
if (max_devs)
|
454 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
455 |
devname, bus_id, mediastr, unit_id); |
456 |
else
|
457 |
snprintf(dinfo->id, 32, "%s%s%i", |
458 |
devname, mediastr, unit_id); |
459 |
} |
460 |
dinfo->bdrv = bdrv_new(dinfo->id); |
461 |
dinfo->devaddr = devaddr; |
462 |
dinfo->type = type; |
463 |
dinfo->bus = bus_id; |
464 |
dinfo->unit = unit_id; |
465 |
dinfo->opts = opts; |
466 |
dinfo->refcount = 1;
|
467 |
if (serial)
|
468 |
strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); |
469 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
470 |
|
471 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
472 |
|
473 |
switch(type) {
|
474 |
case IF_IDE:
|
475 |
case IF_SCSI:
|
476 |
case IF_XEN:
|
477 |
case IF_NONE:
|
478 |
switch(media) {
|
479 |
case MEDIA_DISK:
|
480 |
if (cyls != 0) { |
481 |
bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); |
482 |
bdrv_set_translation_hint(dinfo->bdrv, translation); |
483 |
} |
484 |
break;
|
485 |
case MEDIA_CDROM:
|
486 |
bdrv_set_removable(dinfo->bdrv, 1);
|
487 |
dinfo->media_cd = 1;
|
488 |
break;
|
489 |
} |
490 |
break;
|
491 |
case IF_SD:
|
492 |
/* FIXME: This isn't really a floppy, but it's a reasonable
|
493 |
approximation. */
|
494 |
case IF_FLOPPY:
|
495 |
bdrv_set_removable(dinfo->bdrv, 1);
|
496 |
break;
|
497 |
case IF_PFLASH:
|
498 |
case IF_MTD:
|
499 |
break;
|
500 |
case IF_VIRTIO:
|
501 |
/* add virtio block device */
|
502 |
opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); |
503 |
qemu_opt_set(opts, "driver", "virtio-blk"); |
504 |
qemu_opt_set(opts, "drive", dinfo->id);
|
505 |
if (devaddr)
|
506 |
qemu_opt_set(opts, "addr", devaddr);
|
507 |
break;
|
508 |
default:
|
509 |
abort(); |
510 |
} |
511 |
if (!file || !*file) {
|
512 |
return dinfo;
|
513 |
} |
514 |
if (snapshot) {
|
515 |
/* always use cache=unsafe with snapshot */
|
516 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
517 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
518 |
} |
519 |
|
520 |
if (media == MEDIA_CDROM) {
|
521 |
/* CDROM is fine for any interface, don't check. */
|
522 |
ro = 1;
|
523 |
} else if (ro == 1) { |
524 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
|
525 |
error_report("readonly not supported by this bus type");
|
526 |
goto err;
|
527 |
} |
528 |
} |
529 |
|
530 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
531 |
|
532 |
ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); |
533 |
if (ret < 0) { |
534 |
error_report("could not open disk image %s: %s",
|
535 |
file, strerror(-ret)); |
536 |
goto err;
|
537 |
} |
538 |
|
539 |
if (bdrv_key_required(dinfo->bdrv))
|
540 |
autostart = 0;
|
541 |
return dinfo;
|
542 |
|
543 |
err:
|
544 |
bdrv_delete(dinfo->bdrv); |
545 |
qemu_free(dinfo->id); |
546 |
QTAILQ_REMOVE(&drives, dinfo, next); |
547 |
qemu_free(dinfo); |
548 |
return NULL; |
549 |
} |
550 |
|
551 |
void do_commit(Monitor *mon, const QDict *qdict) |
552 |
{ |
553 |
const char *device = qdict_get_str(qdict, "device"); |
554 |
BlockDriverState *bs; |
555 |
|
556 |
if (!strcmp(device, "all")) { |
557 |
bdrv_commit_all(); |
558 |
} else {
|
559 |
bs = bdrv_find(device); |
560 |
if (!bs) {
|
561 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
562 |
return;
|
563 |
} |
564 |
bdrv_commit(bs); |
565 |
} |
566 |
} |
567 |
|
568 |
int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data) |
569 |
{ |
570 |
const char *device = qdict_get_str(qdict, "device"); |
571 |
const char *filename = qdict_get_try_str(qdict, "snapshot_file"); |
572 |
const char *format = qdict_get_try_str(qdict, "format"); |
573 |
BlockDriverState *bs; |
574 |
BlockDriver *drv, *old_drv, *proto_drv; |
575 |
int ret = 0; |
576 |
int flags;
|
577 |
char old_filename[1024]; |
578 |
|
579 |
if (!filename) {
|
580 |
qerror_report(QERR_MISSING_PARAMETER, "snapshot_file");
|
581 |
ret = -1;
|
582 |
goto out;
|
583 |
} |
584 |
|
585 |
bs = bdrv_find(device); |
586 |
if (!bs) {
|
587 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
588 |
ret = -1;
|
589 |
goto out;
|
590 |
} |
591 |
|
592 |
pstrcpy(old_filename, sizeof(old_filename), bs->filename);
|
593 |
|
594 |
old_drv = bs->drv; |
595 |
flags = bs->open_flags; |
596 |
|
597 |
if (!format) {
|
598 |
format = "qcow2";
|
599 |
} |
600 |
|
601 |
drv = bdrv_find_format(format); |
602 |
if (!drv) {
|
603 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, format); |
604 |
ret = -1;
|
605 |
goto out;
|
606 |
} |
607 |
|
608 |
proto_drv = bdrv_find_protocol(filename); |
609 |
if (!proto_drv) {
|
610 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, format); |
611 |
ret = -1;
|
612 |
goto out;
|
613 |
} |
614 |
|
615 |
ret = bdrv_img_create(filename, format, bs->filename, |
616 |
bs->drv->format_name, NULL, -1, flags); |
617 |
if (ret) {
|
618 |
goto out;
|
619 |
} |
620 |
|
621 |
qemu_aio_flush(); |
622 |
bdrv_flush(bs); |
623 |
|
624 |
bdrv_close(bs); |
625 |
ret = bdrv_open(bs, filename, flags, drv); |
626 |
/*
|
627 |
* If reopening the image file we just created fails, fall back
|
628 |
* and try to re-open the original image. If that fails too, we
|
629 |
* are in serious trouble.
|
630 |
*/
|
631 |
if (ret != 0) { |
632 |
ret = bdrv_open(bs, old_filename, flags, old_drv); |
633 |
if (ret != 0) { |
634 |
qerror_report(QERR_OPEN_FILE_FAILED, old_filename); |
635 |
} else {
|
636 |
qerror_report(QERR_OPEN_FILE_FAILED, filename); |
637 |
} |
638 |
} |
639 |
out:
|
640 |
if (ret) {
|
641 |
ret = -1;
|
642 |
} |
643 |
|
644 |
return ret;
|
645 |
} |
646 |
|
647 |
static int eject_device(Monitor *mon, BlockDriverState *bs, int force) |
648 |
{ |
649 |
if (!force) {
|
650 |
if (!bdrv_is_removable(bs)) {
|
651 |
qerror_report(QERR_DEVICE_NOT_REMOVABLE, |
652 |
bdrv_get_device_name(bs)); |
653 |
return -1; |
654 |
} |
655 |
if (bdrv_is_locked(bs)) {
|
656 |
qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
657 |
return -1; |
658 |
} |
659 |
} |
660 |
bdrv_close(bs); |
661 |
return 0; |
662 |
} |
663 |
|
664 |
int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data) |
665 |
{ |
666 |
BlockDriverState *bs; |
667 |
int force = qdict_get_try_bool(qdict, "force", 0); |
668 |
const char *filename = qdict_get_str(qdict, "device"); |
669 |
|
670 |
bs = bdrv_find(filename); |
671 |
if (!bs) {
|
672 |
qerror_report(QERR_DEVICE_NOT_FOUND, filename); |
673 |
return -1; |
674 |
} |
675 |
return eject_device(mon, bs, force);
|
676 |
} |
677 |
|
678 |
int do_block_set_passwd(Monitor *mon, const QDict *qdict, |
679 |
QObject **ret_data) |
680 |
{ |
681 |
BlockDriverState *bs; |
682 |
int err;
|
683 |
|
684 |
bs = bdrv_find(qdict_get_str(qdict, "device"));
|
685 |
if (!bs) {
|
686 |
qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
|
687 |
return -1; |
688 |
} |
689 |
|
690 |
err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
|
691 |
if (err == -EINVAL) {
|
692 |
qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
693 |
return -1; |
694 |
} else if (err < 0) { |
695 |
qerror_report(QERR_INVALID_PASSWORD); |
696 |
return -1; |
697 |
} |
698 |
|
699 |
return 0; |
700 |
} |
701 |
|
702 |
int do_change_block(Monitor *mon, const char *device, |
703 |
const char *filename, const char *fmt) |
704 |
{ |
705 |
BlockDriverState *bs; |
706 |
BlockDriver *drv = NULL;
|
707 |
int bdrv_flags;
|
708 |
|
709 |
bs = bdrv_find(device); |
710 |
if (!bs) {
|
711 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
712 |
return -1; |
713 |
} |
714 |
if (fmt) {
|
715 |
drv = bdrv_find_whitelisted_format(fmt); |
716 |
if (!drv) {
|
717 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt); |
718 |
return -1; |
719 |
} |
720 |
} |
721 |
if (eject_device(mon, bs, 0) < 0) { |
722 |
return -1; |
723 |
} |
724 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
725 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
726 |
if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { |
727 |
qerror_report(QERR_OPEN_FILE_FAILED, filename); |
728 |
return -1; |
729 |
} |
730 |
return monitor_read_bdrv_key_start(mon, bs, NULL, NULL); |
731 |
} |
732 |
|
733 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
734 |
{ |
735 |
const char *id = qdict_get_str(qdict, "id"); |
736 |
BlockDriverState *bs; |
737 |
|
738 |
bs = bdrv_find(id); |
739 |
if (!bs) {
|
740 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
741 |
return -1; |
742 |
} |
743 |
if (bdrv_in_use(bs)) {
|
744 |
qerror_report(QERR_DEVICE_IN_USE, id); |
745 |
return -1; |
746 |
} |
747 |
|
748 |
/* quiesce block driver; prevent further io */
|
749 |
qemu_aio_flush(); |
750 |
bdrv_flush(bs); |
751 |
bdrv_close(bs); |
752 |
|
753 |
/* if we have a device associated with this BlockDriverState (bs->peer)
|
754 |
* then we need to make the drive anonymous until the device
|
755 |
* can be removed. If this is a drive with no device backing
|
756 |
* then we can just get rid of the block driver state right here.
|
757 |
*/
|
758 |
if (bs->peer) {
|
759 |
bdrv_make_anon(bs); |
760 |
} else {
|
761 |
drive_uninit(drive_get_by_blockdev(bs)); |
762 |
} |
763 |
|
764 |
return 0; |
765 |
} |
766 |
|
767 |
/*
|
768 |
* XXX: replace the QERR_UNDEFINED_ERROR errors with real values once the
|
769 |
* existing QERR_ macro mess is cleaned up. A good example for better
|
770 |
* error reports can be found in the qemu-img resize code.
|
771 |
*/
|
772 |
int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data) |
773 |
{ |
774 |
const char *device = qdict_get_str(qdict, "device"); |
775 |
int64_t size = qdict_get_int(qdict, "size");
|
776 |
BlockDriverState *bs; |
777 |
|
778 |
bs = bdrv_find(device); |
779 |
if (!bs) {
|
780 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
781 |
return -1; |
782 |
} |
783 |
|
784 |
if (size < 0) { |
785 |
qerror_report(QERR_UNDEFINED_ERROR); |
786 |
return -1; |
787 |
} |
788 |
|
789 |
if (bdrv_truncate(bs, size)) {
|
790 |
qerror_report(QERR_UNDEFINED_ERROR); |
791 |
return -1; |
792 |
} |
793 |
|
794 |
return 0; |
795 |
} |