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666daa68 MA |
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 | ||
c9b62a7e | 18 | static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); |
666daa68 MA |
19 | |
20 | QemuOpts *drive_add(const char *file, const char *fmt, ...) | |
21 | { | |
22 | va_list ap; | |
23 | char optstr[1024]; | |
24 | QemuOpts *opts; | |
25 | ||
26 | va_start(ap, fmt); | |
27 | vsnprintf(optstr, sizeof(optstr), fmt, ap); | |
28 | va_end(ap); | |
29 | ||
30 | opts = qemu_opts_parse(&qemu_drive_opts, optstr, 0); | |
31 | if (!opts) { | |
32 | return NULL; | |
33 | } | |
34 | if (file) | |
35 | qemu_opt_set(opts, "file", file); | |
36 | return opts; | |
37 | } | |
38 | ||
39 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
40 | { | |
41 | DriveInfo *dinfo; | |
42 | ||
43 | /* seek interface, bus and unit */ | |
44 | ||
45 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
46 | if (dinfo->type == type && | |
47 | dinfo->bus == bus && | |
48 | dinfo->unit == unit) | |
49 | return dinfo; | |
50 | } | |
51 | ||
52 | return NULL; | |
53 | } | |
54 | ||
55 | DriveInfo *drive_get_by_id(const char *id) | |
56 | { | |
57 | DriveInfo *dinfo; | |
58 | ||
59 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
60 | if (strcmp(id, dinfo->id)) | |
61 | continue; | |
62 | return dinfo; | |
63 | } | |
64 | return NULL; | |
65 | } | |
66 | ||
67 | int drive_get_max_bus(BlockInterfaceType type) | |
68 | { | |
69 | int max_bus; | |
70 | DriveInfo *dinfo; | |
71 | ||
72 | max_bus = -1; | |
73 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
74 | if(dinfo->type == type && | |
75 | dinfo->bus > max_bus) | |
76 | max_bus = dinfo->bus; | |
77 | } | |
78 | return max_bus; | |
79 | } | |
80 | ||
666daa68 MA |
81 | static void bdrv_format_print(void *opaque, const char *name) |
82 | { | |
83 | fprintf(stderr, " %s", name); | |
84 | } | |
85 | ||
86 | void drive_uninit(DriveInfo *dinfo) | |
87 | { | |
88 | qemu_opts_del(dinfo->opts); | |
89 | bdrv_delete(dinfo->bdrv); | |
90 | QTAILQ_REMOVE(&drives, dinfo, next); | |
91 | qemu_free(dinfo); | |
92 | } | |
93 | ||
94 | static int parse_block_error_action(const char *buf, int is_read) | |
95 | { | |
96 | if (!strcmp(buf, "ignore")) { | |
97 | return BLOCK_ERR_IGNORE; | |
98 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
99 | return BLOCK_ERR_STOP_ENOSPC; | |
100 | } else if (!strcmp(buf, "stop")) { | |
101 | return BLOCK_ERR_STOP_ANY; | |
102 | } else if (!strcmp(buf, "report")) { | |
103 | return BLOCK_ERR_REPORT; | |
104 | } else { | |
105 | fprintf(stderr, "qemu: '%s' invalid %s error action\n", | |
106 | buf, is_read ? "read" : "write"); | |
107 | return -1; | |
108 | } | |
109 | } | |
110 | ||
111 | DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error) | |
112 | { | |
113 | const char *buf; | |
114 | const char *file = NULL; | |
115 | char devname[128]; | |
116 | const char *serial; | |
117 | const char *mediastr = ""; | |
118 | BlockInterfaceType type; | |
119 | enum { MEDIA_DISK, MEDIA_CDROM } media; | |
120 | int bus_id, unit_id; | |
121 | int cyls, heads, secs, translation; | |
122 | BlockDriver *drv = NULL; | |
123 | int max_devs; | |
124 | int index; | |
125 | int ro = 0; | |
126 | int bdrv_flags = 0; | |
127 | int on_read_error, on_write_error; | |
128 | const char *devaddr; | |
129 | DriveInfo *dinfo; | |
130 | int snapshot = 0; | |
131 | int ret; | |
132 | ||
133 | *fatal_error = 1; | |
134 | ||
135 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
136 | ||
137 | if (default_to_scsi) { | |
138 | type = IF_SCSI; | |
139 | max_devs = MAX_SCSI_DEVS; | |
140 | pstrcpy(devname, sizeof(devname), "scsi"); | |
141 | } else { | |
142 | type = IF_IDE; | |
143 | max_devs = MAX_IDE_DEVS; | |
144 | pstrcpy(devname, sizeof(devname), "ide"); | |
145 | } | |
146 | media = MEDIA_DISK; | |
147 | ||
148 | /* extract parameters */ | |
149 | bus_id = qemu_opt_get_number(opts, "bus", 0); | |
150 | unit_id = qemu_opt_get_number(opts, "unit", -1); | |
151 | index = qemu_opt_get_number(opts, "index", -1); | |
152 | ||
153 | cyls = qemu_opt_get_number(opts, "cyls", 0); | |
154 | heads = qemu_opt_get_number(opts, "heads", 0); | |
155 | secs = qemu_opt_get_number(opts, "secs", 0); | |
156 | ||
157 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); | |
158 | ro = qemu_opt_get_bool(opts, "readonly", 0); | |
159 | ||
160 | file = qemu_opt_get(opts, "file"); | |
161 | serial = qemu_opt_get(opts, "serial"); | |
162 | ||
163 | if ((buf = qemu_opt_get(opts, "if")) != NULL) { | |
164 | pstrcpy(devname, sizeof(devname), buf); | |
165 | if (!strcmp(buf, "ide")) { | |
166 | type = IF_IDE; | |
167 | max_devs = MAX_IDE_DEVS; | |
168 | } else if (!strcmp(buf, "scsi")) { | |
169 | type = IF_SCSI; | |
170 | max_devs = MAX_SCSI_DEVS; | |
171 | } else if (!strcmp(buf, "floppy")) { | |
172 | type = IF_FLOPPY; | |
173 | max_devs = 0; | |
174 | } else if (!strcmp(buf, "pflash")) { | |
175 | type = IF_PFLASH; | |
176 | max_devs = 0; | |
177 | } else if (!strcmp(buf, "mtd")) { | |
178 | type = IF_MTD; | |
179 | max_devs = 0; | |
180 | } else if (!strcmp(buf, "sd")) { | |
181 | type = IF_SD; | |
182 | max_devs = 0; | |
183 | } else if (!strcmp(buf, "virtio")) { | |
184 | type = IF_VIRTIO; | |
185 | max_devs = 0; | |
186 | } else if (!strcmp(buf, "xen")) { | |
187 | type = IF_XEN; | |
188 | max_devs = 0; | |
189 | } else if (!strcmp(buf, "none")) { | |
190 | type = IF_NONE; | |
191 | max_devs = 0; | |
192 | } else { | |
193 | fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf); | |
194 | return NULL; | |
195 | } | |
196 | } | |
197 | ||
198 | if (cyls || heads || secs) { | |
199 | if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { | |
200 | fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf); | |
201 | return NULL; | |
202 | } | |
203 | if (heads < 1 || (type == IF_IDE && heads > 16)) { | |
204 | fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf); | |
205 | return NULL; | |
206 | } | |
207 | if (secs < 1 || (type == IF_IDE && secs > 63)) { | |
208 | fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf); | |
209 | return NULL; | |
210 | } | |
211 | } | |
212 | ||
213 | if ((buf = qemu_opt_get(opts, "trans")) != NULL) { | |
214 | if (!cyls) { | |
215 | fprintf(stderr, | |
216 | "qemu: '%s' trans must be used with cyls,heads and secs\n", | |
217 | buf); | |
218 | return NULL; | |
219 | } | |
220 | if (!strcmp(buf, "none")) | |
221 | translation = BIOS_ATA_TRANSLATION_NONE; | |
222 | else if (!strcmp(buf, "lba")) | |
223 | translation = BIOS_ATA_TRANSLATION_LBA; | |
224 | else if (!strcmp(buf, "auto")) | |
225 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
226 | else { | |
227 | fprintf(stderr, "qemu: '%s' invalid translation type\n", buf); | |
228 | return NULL; | |
229 | } | |
230 | } | |
231 | ||
232 | if ((buf = qemu_opt_get(opts, "media")) != NULL) { | |
233 | if (!strcmp(buf, "disk")) { | |
234 | media = MEDIA_DISK; | |
235 | } else if (!strcmp(buf, "cdrom")) { | |
236 | if (cyls || secs || heads) { | |
237 | fprintf(stderr, | |
238 | "qemu: '%s' invalid physical CHS format\n", buf); | |
239 | return NULL; | |
240 | } | |
241 | media = MEDIA_CDROM; | |
242 | } else { | |
243 | fprintf(stderr, "qemu: '%s' invalid media\n", buf); | |
244 | return NULL; | |
245 | } | |
246 | } | |
247 | ||
248 | if ((buf = qemu_opt_get(opts, "cache")) != NULL) { | |
249 | if (!strcmp(buf, "off") || !strcmp(buf, "none")) { | |
250 | bdrv_flags |= BDRV_O_NOCACHE; | |
251 | } else if (!strcmp(buf, "writeback")) { | |
252 | bdrv_flags |= BDRV_O_CACHE_WB; | |
253 | } else if (!strcmp(buf, "unsafe")) { | |
254 | bdrv_flags |= BDRV_O_CACHE_WB; | |
255 | bdrv_flags |= BDRV_O_NO_FLUSH; | |
256 | } else if (!strcmp(buf, "writethrough")) { | |
257 | /* this is the default */ | |
258 | } else { | |
259 | fprintf(stderr, "qemu: invalid cache option\n"); | |
260 | return NULL; | |
261 | } | |
262 | } | |
263 | ||
264 | #ifdef CONFIG_LINUX_AIO | |
265 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
266 | if (!strcmp(buf, "native")) { | |
267 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
268 | } else if (!strcmp(buf, "threads")) { | |
269 | /* this is the default */ | |
270 | } else { | |
271 | fprintf(stderr, "qemu: invalid aio option\n"); | |
272 | return NULL; | |
273 | } | |
274 | } | |
275 | #endif | |
276 | ||
277 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
278 | if (strcmp(buf, "?") == 0) { | |
279 | fprintf(stderr, "qemu: Supported formats:"); | |
280 | bdrv_iterate_format(bdrv_format_print, NULL); | |
281 | fprintf(stderr, "\n"); | |
282 | return NULL; | |
283 | } | |
284 | drv = bdrv_find_whitelisted_format(buf); | |
285 | if (!drv) { | |
286 | fprintf(stderr, "qemu: '%s' invalid format\n", buf); | |
287 | return NULL; | |
288 | } | |
289 | } | |
290 | ||
291 | on_write_error = BLOCK_ERR_STOP_ENOSPC; | |
292 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
293 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { | |
294 | fprintf(stderr, "werror is no supported by this format\n"); | |
295 | return NULL; | |
296 | } | |
297 | ||
298 | on_write_error = parse_block_error_action(buf, 0); | |
299 | if (on_write_error < 0) { | |
300 | return NULL; | |
301 | } | |
302 | } | |
303 | ||
304 | on_read_error = BLOCK_ERR_REPORT; | |
305 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
306 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_NONE) { | |
307 | fprintf(stderr, "rerror is no supported by this format\n"); | |
308 | return NULL; | |
309 | } | |
310 | ||
311 | on_read_error = parse_block_error_action(buf, 1); | |
312 | if (on_read_error < 0) { | |
313 | return NULL; | |
314 | } | |
315 | } | |
316 | ||
317 | if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { | |
318 | if (type != IF_VIRTIO) { | |
319 | fprintf(stderr, "addr is not supported\n"); | |
320 | return NULL; | |
321 | } | |
322 | } | |
323 | ||
324 | /* compute bus and unit according index */ | |
325 | ||
326 | if (index != -1) { | |
327 | if (bus_id != 0 || unit_id != -1) { | |
328 | fprintf(stderr, | |
329 | "qemu: index cannot be used with bus and unit\n"); | |
330 | return NULL; | |
331 | } | |
332 | if (max_devs == 0) | |
333 | { | |
334 | unit_id = index; | |
335 | bus_id = 0; | |
336 | } else { | |
337 | unit_id = index % max_devs; | |
338 | bus_id = index / max_devs; | |
339 | } | |
340 | } | |
341 | ||
342 | /* if user doesn't specify a unit_id, | |
343 | * try to find the first free | |
344 | */ | |
345 | ||
346 | if (unit_id == -1) { | |
347 | unit_id = 0; | |
348 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
349 | unit_id++; | |
350 | if (max_devs && unit_id >= max_devs) { | |
351 | unit_id -= max_devs; | |
352 | bus_id++; | |
353 | } | |
354 | } | |
355 | } | |
356 | ||
357 | /* check unit id */ | |
358 | ||
359 | if (max_devs && unit_id >= max_devs) { | |
360 | fprintf(stderr, "qemu: unit %d too big (max is %d)\n", | |
361 | unit_id, max_devs - 1); | |
362 | return NULL; | |
363 | } | |
364 | ||
365 | /* | |
366 | * ignore multiple definitions | |
367 | */ | |
368 | ||
369 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
370 | *fatal_error = 0; | |
371 | return NULL; | |
372 | } | |
373 | ||
374 | /* init */ | |
375 | ||
376 | dinfo = qemu_mallocz(sizeof(*dinfo)); | |
377 | if ((buf = qemu_opts_id(opts)) != NULL) { | |
378 | dinfo->id = qemu_strdup(buf); | |
379 | } else { | |
380 | /* no id supplied -> create one */ | |
381 | dinfo->id = qemu_mallocz(32); | |
382 | if (type == IF_IDE || type == IF_SCSI) | |
383 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
384 | if (max_devs) | |
385 | snprintf(dinfo->id, 32, "%s%i%s%i", | |
386 | devname, bus_id, mediastr, unit_id); | |
387 | else | |
388 | snprintf(dinfo->id, 32, "%s%s%i", | |
389 | devname, mediastr, unit_id); | |
390 | } | |
391 | dinfo->bdrv = bdrv_new(dinfo->id); | |
392 | dinfo->devaddr = devaddr; | |
393 | dinfo->type = type; | |
394 | dinfo->bus = bus_id; | |
395 | dinfo->unit = unit_id; | |
666daa68 MA |
396 | dinfo->opts = opts; |
397 | if (serial) | |
653dbec7 | 398 | strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); |
666daa68 MA |
399 | QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
400 | ||
abd7f68d MA |
401 | bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
402 | ||
666daa68 MA |
403 | switch(type) { |
404 | case IF_IDE: | |
405 | case IF_SCSI: | |
406 | case IF_XEN: | |
407 | case IF_NONE: | |
408 | switch(media) { | |
409 | case MEDIA_DISK: | |
410 | if (cyls != 0) { | |
411 | bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); | |
412 | bdrv_set_translation_hint(dinfo->bdrv, translation); | |
413 | } | |
414 | break; | |
415 | case MEDIA_CDROM: | |
416 | bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM); | |
417 | break; | |
418 | } | |
419 | break; | |
420 | case IF_SD: | |
421 | /* FIXME: This isn't really a floppy, but it's a reasonable | |
422 | approximation. */ | |
423 | case IF_FLOPPY: | |
424 | bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY); | |
425 | break; | |
426 | case IF_PFLASH: | |
427 | case IF_MTD: | |
428 | break; | |
429 | case IF_VIRTIO: | |
430 | /* add virtio block device */ | |
431 | opts = qemu_opts_create(&qemu_device_opts, NULL, 0); | |
432 | qemu_opt_set(opts, "driver", "virtio-blk-pci"); | |
433 | qemu_opt_set(opts, "drive", dinfo->id); | |
434 | if (devaddr) | |
435 | qemu_opt_set(opts, "addr", devaddr); | |
436 | break; | |
437 | case IF_COUNT: | |
438 | abort(); | |
439 | } | |
dd5b0d71 | 440 | if (!file || !*file) { |
666daa68 MA |
441 | *fatal_error = 0; |
442 | return NULL; | |
443 | } | |
444 | if (snapshot) { | |
445 | /* always use cache=unsafe with snapshot */ | |
446 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
447 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
448 | } | |
449 | ||
450 | if (media == MEDIA_CDROM) { | |
451 | /* CDROM is fine for any interface, don't check. */ | |
452 | ro = 1; | |
453 | } else if (ro == 1) { | |
454 | if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) { | |
455 | fprintf(stderr, "qemu: readonly flag not supported for drive with this interface\n"); | |
456 | return NULL; | |
457 | } | |
458 | } | |
459 | ||
460 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; | |
461 | ||
462 | ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); | |
463 | if (ret < 0) { | |
464 | fprintf(stderr, "qemu: could not open disk image %s: %s\n", | |
465 | file, strerror(-ret)); | |
466 | return NULL; | |
467 | } | |
468 | ||
469 | if (bdrv_key_required(dinfo->bdrv)) | |
470 | autostart = 0; | |
471 | *fatal_error = 0; | |
472 | return dinfo; | |
473 | } | |
474 | ||
475 | void do_commit(Monitor *mon, const QDict *qdict) | |
476 | { | |
666daa68 | 477 | const char *device = qdict_get_str(qdict, "device"); |
6ab4b5ab | 478 | BlockDriverState *bs; |
666daa68 | 479 | |
6ab4b5ab MA |
480 | if (!strcmp(device, "all")) { |
481 | bdrv_commit_all(); | |
482 | } else { | |
483 | bs = bdrv_find(device); | |
ac59eb95 MA |
484 | if (!bs) { |
485 | qerror_report(QERR_DEVICE_NOT_FOUND, device); | |
486 | return; | |
6ab4b5ab | 487 | } |
ac59eb95 | 488 | bdrv_commit(bs); |
666daa68 MA |
489 | } |
490 | } | |
491 | ||
492 | static int eject_device(Monitor *mon, BlockDriverState *bs, int force) | |
493 | { | |
3b5276b5 EH |
494 | if (!force) { |
495 | if (!bdrv_is_removable(bs)) { | |
496 | qerror_report(QERR_DEVICE_NOT_REMOVABLE, | |
497 | bdrv_get_device_name(bs)); | |
498 | return -1; | |
499 | } | |
500 | if (bdrv_is_locked(bs)) { | |
501 | qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); | |
502 | return -1; | |
666daa68 | 503 | } |
666daa68 | 504 | } |
3b5276b5 | 505 | bdrv_close(bs); |
666daa68 MA |
506 | return 0; |
507 | } | |
508 | ||
509 | int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data) | |
510 | { | |
511 | BlockDriverState *bs; | |
512 | int force = qdict_get_int(qdict, "force"); | |
513 | const char *filename = qdict_get_str(qdict, "device"); | |
514 | ||
515 | bs = bdrv_find(filename); | |
516 | if (!bs) { | |
517 | qerror_report(QERR_DEVICE_NOT_FOUND, filename); | |
518 | return -1; | |
519 | } | |
520 | return eject_device(mon, bs, force); | |
521 | } | |
522 | ||
523 | int do_block_set_passwd(Monitor *mon, const QDict *qdict, | |
524 | QObject **ret_data) | |
525 | { | |
526 | BlockDriverState *bs; | |
527 | int err; | |
528 | ||
529 | bs = bdrv_find(qdict_get_str(qdict, "device")); | |
530 | if (!bs) { | |
531 | qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device")); | |
532 | return -1; | |
533 | } | |
534 | ||
535 | err = bdrv_set_key(bs, qdict_get_str(qdict, "password")); | |
536 | if (err == -EINVAL) { | |
537 | qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
538 | return -1; | |
539 | } else if (err < 0) { | |
540 | qerror_report(QERR_INVALID_PASSWORD); | |
541 | return -1; | |
542 | } | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
547 | int do_change_block(Monitor *mon, const char *device, | |
548 | const char *filename, const char *fmt) | |
549 | { | |
550 | BlockDriverState *bs; | |
551 | BlockDriver *drv = NULL; | |
552 | int bdrv_flags; | |
553 | ||
554 | bs = bdrv_find(device); | |
555 | if (!bs) { | |
556 | qerror_report(QERR_DEVICE_NOT_FOUND, device); | |
557 | return -1; | |
558 | } | |
559 | if (fmt) { | |
560 | drv = bdrv_find_whitelisted_format(fmt); | |
561 | if (!drv) { | |
562 | qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt); | |
563 | return -1; | |
564 | } | |
565 | } | |
566 | if (eject_device(mon, bs, 0) < 0) { | |
567 | return -1; | |
568 | } | |
569 | bdrv_flags = bdrv_get_type_hint(bs) == BDRV_TYPE_CDROM ? 0 : BDRV_O_RDWR; | |
570 | if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { | |
571 | qerror_report(QERR_OPEN_FILE_FAILED, filename); | |
572 | return -1; | |
573 | } | |
574 | return monitor_read_bdrv_key_start(mon, bs, NULL, NULL); | |
575 | } |