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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" | |
12bd451f | 16 | #include "qemu-objects.h" |
666daa68 | 17 | #include "sysemu.h" |
9063f814 | 18 | #include "block_int.h" |
a4dea8a9 | 19 | #include "qmp-commands.h" |
12bd451f | 20 | #include "trace.h" |
666daa68 | 21 | |
c9b62a7e | 22 | static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); |
666daa68 | 23 | |
1960966d MA |
24 | static const char *const if_name[IF_COUNT] = { |
25 | [IF_NONE] = "none", | |
26 | [IF_IDE] = "ide", | |
27 | [IF_SCSI] = "scsi", | |
28 | [IF_FLOPPY] = "floppy", | |
29 | [IF_PFLASH] = "pflash", | |
30 | [IF_MTD] = "mtd", | |
31 | [IF_SD] = "sd", | |
32 | [IF_VIRTIO] = "virtio", | |
33 | [IF_XEN] = "xen", | |
34 | }; | |
35 | ||
36 | static const int if_max_devs[IF_COUNT] = { | |
27d6bf40 MA |
37 | /* |
38 | * Do not change these numbers! They govern how drive option | |
39 | * index maps to unit and bus. That mapping is ABI. | |
40 | * | |
41 | * All controllers used to imlement if=T drives need to support | |
42 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
43 | * Otherwise, some index values map to "impossible" bus, unit | |
44 | * values. | |
45 | * | |
46 | * For instance, if you change [IF_SCSI] to 255, -drive | |
47 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
48 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
49 | * the drive can't be set up. Regression. | |
50 | */ | |
51 | [IF_IDE] = 2, | |
52 | [IF_SCSI] = 7, | |
1960966d MA |
53 | }; |
54 | ||
14bafc54 MA |
55 | /* |
56 | * We automatically delete the drive when a device using it gets | |
57 | * unplugged. Questionable feature, but we can't just drop it. | |
58 | * Device models call blockdev_mark_auto_del() to schedule the | |
59 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
60 | * when deletion is actually safe. | |
61 | */ | |
62 | void blockdev_mark_auto_del(BlockDriverState *bs) | |
63 | { | |
64 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
65 | ||
0fc0f1fa RH |
66 | if (dinfo) { |
67 | dinfo->auto_del = 1; | |
68 | } | |
14bafc54 MA |
69 | } |
70 | ||
71 | void blockdev_auto_del(BlockDriverState *bs) | |
72 | { | |
73 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
74 | ||
0fc0f1fa | 75 | if (dinfo && dinfo->auto_del) { |
84fb3925 | 76 | drive_put_ref(dinfo); |
14bafc54 MA |
77 | } |
78 | } | |
79 | ||
505a7fb1 MA |
80 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
81 | { | |
82 | int max_devs = if_max_devs[type]; | |
83 | return max_devs ? index / max_devs : 0; | |
84 | } | |
85 | ||
86 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
87 | { | |
88 | int max_devs = if_max_devs[type]; | |
89 | return max_devs ? index % max_devs : index; | |
90 | } | |
91 | ||
2292ddae MA |
92 | QemuOpts *drive_def(const char *optstr) |
93 | { | |
94 | return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); | |
95 | } | |
96 | ||
97 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
5645b0f4 | 98 | const char *optstr) |
666daa68 | 99 | { |
666daa68 | 100 | QemuOpts *opts; |
2292ddae | 101 | char buf[32]; |
666daa68 | 102 | |
2292ddae | 103 | opts = drive_def(optstr); |
666daa68 MA |
104 | if (!opts) { |
105 | return NULL; | |
106 | } | |
2292ddae MA |
107 | if (type != IF_DEFAULT) { |
108 | qemu_opt_set(opts, "if", if_name[type]); | |
109 | } | |
110 | if (index >= 0) { | |
111 | snprintf(buf, sizeof(buf), "%d", index); | |
112 | qemu_opt_set(opts, "index", buf); | |
113 | } | |
666daa68 MA |
114 | if (file) |
115 | qemu_opt_set(opts, "file", file); | |
116 | return opts; | |
117 | } | |
118 | ||
119 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
120 | { | |
121 | DriveInfo *dinfo; | |
122 | ||
123 | /* seek interface, bus and unit */ | |
124 | ||
125 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
126 | if (dinfo->type == type && | |
127 | dinfo->bus == bus && | |
128 | dinfo->unit == unit) | |
129 | return dinfo; | |
130 | } | |
131 | ||
132 | return NULL; | |
133 | } | |
134 | ||
f1bd51ac MA |
135 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
136 | { | |
137 | return drive_get(type, | |
138 | drive_index_to_bus_id(type, index), | |
139 | drive_index_to_unit_id(type, index)); | |
140 | } | |
141 | ||
666daa68 MA |
142 | int drive_get_max_bus(BlockInterfaceType type) |
143 | { | |
144 | int max_bus; | |
145 | DriveInfo *dinfo; | |
146 | ||
147 | max_bus = -1; | |
148 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
149 | if(dinfo->type == type && | |
150 | dinfo->bus > max_bus) | |
151 | max_bus = dinfo->bus; | |
152 | } | |
153 | return max_bus; | |
154 | } | |
155 | ||
13839974 MA |
156 | /* Get a block device. This should only be used for single-drive devices |
157 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
158 | appropriate bus. */ | |
159 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
160 | { | |
161 | static int next_block_unit[IF_COUNT]; | |
162 | ||
163 | return drive_get(type, 0, next_block_unit[type]++); | |
164 | } | |
165 | ||
e4700e59 | 166 | DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) |
666daa68 MA |
167 | { |
168 | DriveInfo *dinfo; | |
169 | ||
170 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
e4700e59 MA |
171 | if (dinfo->bdrv == bs) { |
172 | return dinfo; | |
173 | } | |
666daa68 | 174 | } |
e4700e59 | 175 | return NULL; |
666daa68 MA |
176 | } |
177 | ||
666daa68 MA |
178 | static void bdrv_format_print(void *opaque, const char *name) |
179 | { | |
807105a7 | 180 | error_printf(" %s", name); |
666daa68 MA |
181 | } |
182 | ||
84fb3925 | 183 | static void drive_uninit(DriveInfo *dinfo) |
666daa68 MA |
184 | { |
185 | qemu_opts_del(dinfo->opts); | |
186 | bdrv_delete(dinfo->bdrv); | |
7267c094 | 187 | g_free(dinfo->id); |
666daa68 | 188 | QTAILQ_REMOVE(&drives, dinfo, next); |
7267c094 | 189 | g_free(dinfo); |
666daa68 MA |
190 | } |
191 | ||
84fb3925 MT |
192 | void drive_put_ref(DriveInfo *dinfo) |
193 | { | |
194 | assert(dinfo->refcount); | |
195 | if (--dinfo->refcount == 0) { | |
196 | drive_uninit(dinfo); | |
197 | } | |
198 | } | |
199 | ||
200 | void drive_get_ref(DriveInfo *dinfo) | |
201 | { | |
202 | dinfo->refcount++; | |
203 | } | |
204 | ||
666daa68 MA |
205 | static int parse_block_error_action(const char *buf, int is_read) |
206 | { | |
207 | if (!strcmp(buf, "ignore")) { | |
208 | return BLOCK_ERR_IGNORE; | |
209 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
210 | return BLOCK_ERR_STOP_ENOSPC; | |
211 | } else if (!strcmp(buf, "stop")) { | |
212 | return BLOCK_ERR_STOP_ANY; | |
213 | } else if (!strcmp(buf, "report")) { | |
214 | return BLOCK_ERR_REPORT; | |
215 | } else { | |
807105a7 MA |
216 | error_report("'%s' invalid %s error action", |
217 | buf, is_read ? "read" : "write"); | |
666daa68 MA |
218 | return -1; |
219 | } | |
220 | } | |
221 | ||
0563e191 ZYW |
222 | static bool do_check_io_limits(BlockIOLimit *io_limits) |
223 | { | |
224 | bool bps_flag; | |
225 | bool iops_flag; | |
226 | ||
227 | assert(io_limits); | |
228 | ||
229 | bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0) | |
230 | && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0) | |
231 | || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0)); | |
232 | iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0) | |
233 | && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0) | |
234 | || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0)); | |
235 | if (bps_flag || iops_flag) { | |
236 | return false; | |
237 | } | |
238 | ||
239 | return true; | |
240 | } | |
241 | ||
319ae529 | 242 | DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi) |
666daa68 MA |
243 | { |
244 | const char *buf; | |
245 | const char *file = NULL; | |
246 | char devname[128]; | |
247 | const char *serial; | |
248 | const char *mediastr = ""; | |
249 | BlockInterfaceType type; | |
250 | enum { MEDIA_DISK, MEDIA_CDROM } media; | |
251 | int bus_id, unit_id; | |
252 | int cyls, heads, secs, translation; | |
253 | BlockDriver *drv = NULL; | |
254 | int max_devs; | |
255 | int index; | |
256 | int ro = 0; | |
257 | int bdrv_flags = 0; | |
258 | int on_read_error, on_write_error; | |
259 | const char *devaddr; | |
260 | DriveInfo *dinfo; | |
0563e191 | 261 | BlockIOLimit io_limits; |
666daa68 | 262 | int snapshot = 0; |
fb0490f6 | 263 | bool copy_on_read; |
666daa68 MA |
264 | int ret; |
265 | ||
666daa68 | 266 | translation = BIOS_ATA_TRANSLATION_AUTO; |
666daa68 MA |
267 | media = MEDIA_DISK; |
268 | ||
269 | /* extract parameters */ | |
270 | bus_id = qemu_opt_get_number(opts, "bus", 0); | |
271 | unit_id = qemu_opt_get_number(opts, "unit", -1); | |
272 | index = qemu_opt_get_number(opts, "index", -1); | |
273 | ||
274 | cyls = qemu_opt_get_number(opts, "cyls", 0); | |
275 | heads = qemu_opt_get_number(opts, "heads", 0); | |
276 | secs = qemu_opt_get_number(opts, "secs", 0); | |
277 | ||
278 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); | |
279 | ro = qemu_opt_get_bool(opts, "readonly", 0); | |
fb0490f6 | 280 | copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
666daa68 MA |
281 | |
282 | file = qemu_opt_get(opts, "file"); | |
283 | serial = qemu_opt_get(opts, "serial"); | |
284 | ||
285 | if ((buf = qemu_opt_get(opts, "if")) != NULL) { | |
286 | pstrcpy(devname, sizeof(devname), buf); | |
1960966d MA |
287 | for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
288 | ; | |
289 | if (type == IF_COUNT) { | |
807105a7 | 290 | error_report("unsupported bus type '%s'", buf); |
666daa68 MA |
291 | return NULL; |
292 | } | |
2d3999fe LC |
293 | } else { |
294 | type = default_to_scsi ? IF_SCSI : IF_IDE; | |
295 | pstrcpy(devname, sizeof(devname), if_name[type]); | |
666daa68 | 296 | } |
2d3999fe | 297 | |
1960966d | 298 | max_devs = if_max_devs[type]; |
666daa68 MA |
299 | |
300 | if (cyls || heads || secs) { | |
301 | if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { | |
807105a7 | 302 | error_report("invalid physical cyls number"); |
666daa68 MA |
303 | return NULL; |
304 | } | |
305 | if (heads < 1 || (type == IF_IDE && heads > 16)) { | |
807105a7 | 306 | error_report("invalid physical heads number"); |
666daa68 MA |
307 | return NULL; |
308 | } | |
309 | if (secs < 1 || (type == IF_IDE && secs > 63)) { | |
807105a7 | 310 | error_report("invalid physical secs number"); |
666daa68 MA |
311 | return NULL; |
312 | } | |
313 | } | |
314 | ||
315 | if ((buf = qemu_opt_get(opts, "trans")) != NULL) { | |
316 | if (!cyls) { | |
e4080f9b | 317 | error_report("'%s' trans must be used with cyls, heads and secs", |
807105a7 | 318 | buf); |
666daa68 MA |
319 | return NULL; |
320 | } | |
321 | if (!strcmp(buf, "none")) | |
322 | translation = BIOS_ATA_TRANSLATION_NONE; | |
323 | else if (!strcmp(buf, "lba")) | |
324 | translation = BIOS_ATA_TRANSLATION_LBA; | |
325 | else if (!strcmp(buf, "auto")) | |
326 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
327 | else { | |
807105a7 | 328 | error_report("'%s' invalid translation type", buf); |
666daa68 MA |
329 | return NULL; |
330 | } | |
331 | } | |
332 | ||
333 | if ((buf = qemu_opt_get(opts, "media")) != NULL) { | |
334 | if (!strcmp(buf, "disk")) { | |
335 | media = MEDIA_DISK; | |
336 | } else if (!strcmp(buf, "cdrom")) { | |
337 | if (cyls || secs || heads) { | |
e7ff8f0e | 338 | error_report("CHS can't be set with media=%s", buf); |
666daa68 MA |
339 | return NULL; |
340 | } | |
341 | media = MEDIA_CDROM; | |
342 | } else { | |
807105a7 | 343 | error_report("'%s' invalid media", buf); |
666daa68 MA |
344 | return NULL; |
345 | } | |
346 | } | |
347 | ||
348 | if ((buf = qemu_opt_get(opts, "cache")) != NULL) { | |
c3993cdc SH |
349 | if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { |
350 | error_report("invalid cache option"); | |
351 | return NULL; | |
666daa68 MA |
352 | } |
353 | } | |
354 | ||
355 | #ifdef CONFIG_LINUX_AIO | |
356 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
357 | if (!strcmp(buf, "native")) { | |
358 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
359 | } else if (!strcmp(buf, "threads")) { | |
360 | /* this is the default */ | |
361 | } else { | |
807105a7 | 362 | error_report("invalid aio option"); |
666daa68 MA |
363 | return NULL; |
364 | } | |
365 | } | |
366 | #endif | |
367 | ||
368 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
369 | if (strcmp(buf, "?") == 0) { | |
807105a7 MA |
370 | error_printf("Supported formats:"); |
371 | bdrv_iterate_format(bdrv_format_print, NULL); | |
372 | error_printf("\n"); | |
373 | return NULL; | |
666daa68 MA |
374 | } |
375 | drv = bdrv_find_whitelisted_format(buf); | |
376 | if (!drv) { | |
807105a7 | 377 | error_report("'%s' invalid format", buf); |
666daa68 MA |
378 | return NULL; |
379 | } | |
380 | } | |
381 | ||
0563e191 ZYW |
382 | /* disk I/O throttling */ |
383 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = | |
384 | qemu_opt_get_number(opts, "bps", 0); | |
385 | io_limits.bps[BLOCK_IO_LIMIT_READ] = | |
386 | qemu_opt_get_number(opts, "bps_rd", 0); | |
387 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = | |
388 | qemu_opt_get_number(opts, "bps_wr", 0); | |
389 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = | |
390 | qemu_opt_get_number(opts, "iops", 0); | |
391 | io_limits.iops[BLOCK_IO_LIMIT_READ] = | |
392 | qemu_opt_get_number(opts, "iops_rd", 0); | |
393 | io_limits.iops[BLOCK_IO_LIMIT_WRITE] = | |
394 | qemu_opt_get_number(opts, "iops_wr", 0); | |
395 | ||
396 | if (!do_check_io_limits(&io_limits)) { | |
397 | error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " | |
398 | "cannot be used at the same time"); | |
399 | return NULL; | |
400 | } | |
401 | ||
666daa68 MA |
402 | on_write_error = BLOCK_ERR_STOP_ENOSPC; |
403 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
404 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { | |
807105a7 | 405 | error_report("werror is not supported by this bus type"); |
666daa68 MA |
406 | return NULL; |
407 | } | |
408 | ||
409 | on_write_error = parse_block_error_action(buf, 0); | |
410 | if (on_write_error < 0) { | |
411 | return NULL; | |
412 | } | |
413 | } | |
414 | ||
415 | on_read_error = BLOCK_ERR_REPORT; | |
416 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
5dba48a8 | 417 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) { |
807105a7 | 418 | error_report("rerror is not supported by this bus type"); |
666daa68 MA |
419 | return NULL; |
420 | } | |
421 | ||
422 | on_read_error = parse_block_error_action(buf, 1); | |
423 | if (on_read_error < 0) { | |
424 | return NULL; | |
425 | } | |
426 | } | |
427 | ||
428 | if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { | |
429 | if (type != IF_VIRTIO) { | |
807105a7 | 430 | error_report("addr is not supported by this bus type"); |
666daa68 MA |
431 | return NULL; |
432 | } | |
433 | } | |
434 | ||
435 | /* compute bus and unit according index */ | |
436 | ||
437 | if (index != -1) { | |
438 | if (bus_id != 0 || unit_id != -1) { | |
807105a7 | 439 | error_report("index cannot be used with bus and unit"); |
666daa68 MA |
440 | return NULL; |
441 | } | |
505a7fb1 MA |
442 | bus_id = drive_index_to_bus_id(type, index); |
443 | unit_id = drive_index_to_unit_id(type, index); | |
666daa68 MA |
444 | } |
445 | ||
446 | /* if user doesn't specify a unit_id, | |
447 | * try to find the first free | |
448 | */ | |
449 | ||
450 | if (unit_id == -1) { | |
451 | unit_id = 0; | |
452 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
453 | unit_id++; | |
454 | if (max_devs && unit_id >= max_devs) { | |
455 | unit_id -= max_devs; | |
456 | bus_id++; | |
457 | } | |
458 | } | |
459 | } | |
460 | ||
461 | /* check unit id */ | |
462 | ||
463 | if (max_devs && unit_id >= max_devs) { | |
807105a7 MA |
464 | error_report("unit %d too big (max is %d)", |
465 | unit_id, max_devs - 1); | |
666daa68 MA |
466 | return NULL; |
467 | } | |
468 | ||
469 | /* | |
4e5d9b57 | 470 | * catch multiple definitions |
666daa68 MA |
471 | */ |
472 | ||
473 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
4e5d9b57 MA |
474 | error_report("drive with bus=%d, unit=%d (index=%d) exists", |
475 | bus_id, unit_id, index); | |
666daa68 MA |
476 | return NULL; |
477 | } | |
478 | ||
479 | /* init */ | |
480 | ||
7267c094 | 481 | dinfo = g_malloc0(sizeof(*dinfo)); |
666daa68 | 482 | if ((buf = qemu_opts_id(opts)) != NULL) { |
7267c094 | 483 | dinfo->id = g_strdup(buf); |
666daa68 MA |
484 | } else { |
485 | /* no id supplied -> create one */ | |
7267c094 | 486 | dinfo->id = g_malloc0(32); |
666daa68 MA |
487 | if (type == IF_IDE || type == IF_SCSI) |
488 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
489 | if (max_devs) | |
490 | snprintf(dinfo->id, 32, "%s%i%s%i", | |
491 | devname, bus_id, mediastr, unit_id); | |
492 | else | |
493 | snprintf(dinfo->id, 32, "%s%s%i", | |
494 | devname, mediastr, unit_id); | |
495 | } | |
496 | dinfo->bdrv = bdrv_new(dinfo->id); | |
497 | dinfo->devaddr = devaddr; | |
498 | dinfo->type = type; | |
499 | dinfo->bus = bus_id; | |
500 | dinfo->unit = unit_id; | |
666daa68 | 501 | dinfo->opts = opts; |
84fb3925 | 502 | dinfo->refcount = 1; |
666daa68 | 503 | if (serial) |
653dbec7 | 504 | strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); |
666daa68 MA |
505 | QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
506 | ||
abd7f68d MA |
507 | bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
508 | ||
0563e191 ZYW |
509 | /* disk I/O throttling */ |
510 | bdrv_set_io_limits(dinfo->bdrv, &io_limits); | |
511 | ||
666daa68 MA |
512 | switch(type) { |
513 | case IF_IDE: | |
514 | case IF_SCSI: | |
515 | case IF_XEN: | |
516 | case IF_NONE: | |
517 | switch(media) { | |
518 | case MEDIA_DISK: | |
519 | if (cyls != 0) { | |
520 | bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); | |
521 | bdrv_set_translation_hint(dinfo->bdrv, translation); | |
522 | } | |
523 | break; | |
524 | case MEDIA_CDROM: | |
95b5edcd | 525 | dinfo->media_cd = 1; |
666daa68 MA |
526 | break; |
527 | } | |
528 | break; | |
529 | case IF_SD: | |
666daa68 | 530 | case IF_FLOPPY: |
666daa68 MA |
531 | case IF_PFLASH: |
532 | case IF_MTD: | |
533 | break; | |
534 | case IF_VIRTIO: | |
535 | /* add virtio block device */ | |
3329f07b | 536 | opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); |
29f82b37 | 537 | qemu_opt_set(opts, "driver", "virtio-blk"); |
666daa68 MA |
538 | qemu_opt_set(opts, "drive", dinfo->id); |
539 | if (devaddr) | |
540 | qemu_opt_set(opts, "addr", devaddr); | |
541 | break; | |
2292ddae | 542 | default: |
666daa68 MA |
543 | abort(); |
544 | } | |
dd5b0d71 | 545 | if (!file || !*file) { |
319ae529 | 546 | return dinfo; |
666daa68 MA |
547 | } |
548 | if (snapshot) { | |
549 | /* always use cache=unsafe with snapshot */ | |
550 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
551 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
552 | } | |
553 | ||
fb0490f6 SH |
554 | if (copy_on_read) { |
555 | bdrv_flags |= BDRV_O_COPY_ON_READ; | |
556 | } | |
557 | ||
666daa68 MA |
558 | if (media == MEDIA_CDROM) { |
559 | /* CDROM is fine for any interface, don't check. */ | |
560 | ro = 1; | |
561 | } else if (ro == 1) { | |
562 | if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) { | |
807105a7 | 563 | error_report("readonly not supported by this bus type"); |
a9ae2bff | 564 | goto err; |
666daa68 MA |
565 | } |
566 | } | |
567 | ||
568 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; | |
569 | ||
570 | ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); | |
571 | if (ret < 0) { | |
807105a7 MA |
572 | error_report("could not open disk image %s: %s", |
573 | file, strerror(-ret)); | |
a9ae2bff | 574 | goto err; |
666daa68 MA |
575 | } |
576 | ||
577 | if (bdrv_key_required(dinfo->bdrv)) | |
578 | autostart = 0; | |
666daa68 | 579 | return dinfo; |
a9ae2bff MA |
580 | |
581 | err: | |
582 | bdrv_delete(dinfo->bdrv); | |
7267c094 | 583 | g_free(dinfo->id); |
a9ae2bff | 584 | QTAILQ_REMOVE(&drives, dinfo, next); |
7267c094 | 585 | g_free(dinfo); |
a9ae2bff | 586 | return NULL; |
666daa68 MA |
587 | } |
588 | ||
589 | void do_commit(Monitor *mon, const QDict *qdict) | |
590 | { | |
666daa68 | 591 | const char *device = qdict_get_str(qdict, "device"); |
6ab4b5ab | 592 | BlockDriverState *bs; |
666daa68 | 593 | |
6ab4b5ab MA |
594 | if (!strcmp(device, "all")) { |
595 | bdrv_commit_all(); | |
596 | } else { | |
2d3735d3 SH |
597 | int ret; |
598 | ||
6ab4b5ab | 599 | bs = bdrv_find(device); |
ac59eb95 MA |
600 | if (!bs) { |
601 | qerror_report(QERR_DEVICE_NOT_FOUND, device); | |
602 | return; | |
6ab4b5ab | 603 | } |
2d3735d3 SH |
604 | ret = bdrv_commit(bs); |
605 | if (ret == -EBUSY) { | |
606 | qerror_report(QERR_DEVICE_IN_USE, device); | |
607 | return; | |
608 | } | |
666daa68 MA |
609 | } |
610 | } | |
611 | ||
6106e249 LC |
612 | void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
613 | bool has_format, const char *format, | |
614 | Error **errp) | |
f8882568 | 615 | { |
f8882568 | 616 | BlockDriverState *bs; |
52f9a172 | 617 | BlockDriver *drv, *old_drv, *proto_drv; |
f8882568 JS |
618 | int ret = 0; |
619 | int flags; | |
52f9a172 | 620 | char old_filename[1024]; |
f8882568 JS |
621 | |
622 | bs = bdrv_find(device); | |
623 | if (!bs) { | |
6106e249 LC |
624 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
625 | return; | |
f8882568 | 626 | } |
2d3735d3 SH |
627 | if (bdrv_in_use(bs)) { |
628 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
629 | return; | |
630 | } | |
f8882568 | 631 | |
52f9a172 JS |
632 | pstrcpy(old_filename, sizeof(old_filename), bs->filename); |
633 | ||
634 | old_drv = bs->drv; | |
635 | flags = bs->open_flags; | |
636 | ||
6106e249 | 637 | if (!has_format) { |
f8882568 JS |
638 | format = "qcow2"; |
639 | } | |
640 | ||
641 | drv = bdrv_find_format(format); | |
642 | if (!drv) { | |
6106e249 LC |
643 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
644 | return; | |
f8882568 JS |
645 | } |
646 | ||
6106e249 | 647 | proto_drv = bdrv_find_protocol(snapshot_file); |
f8882568 | 648 | if (!proto_drv) { |
6106e249 LC |
649 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
650 | return; | |
f8882568 JS |
651 | } |
652 | ||
6106e249 | 653 | ret = bdrv_img_create(snapshot_file, format, bs->filename, |
52f9a172 | 654 | bs->drv->format_name, NULL, -1, flags); |
f8882568 | 655 | if (ret) { |
6106e249 LC |
656 | error_set(errp, QERR_UNDEFINED_ERROR); |
657 | return; | |
f8882568 JS |
658 | } |
659 | ||
922453bc | 660 | bdrv_drain_all(); |
f8882568 JS |
661 | bdrv_flush(bs); |
662 | ||
f8882568 | 663 | bdrv_close(bs); |
6106e249 | 664 | ret = bdrv_open(bs, snapshot_file, flags, drv); |
f8882568 | 665 | /* |
52f9a172 JS |
666 | * If reopening the image file we just created fails, fall back |
667 | * and try to re-open the original image. If that fails too, we | |
668 | * are in serious trouble. | |
f8882568 JS |
669 | */ |
670 | if (ret != 0) { | |
52f9a172 JS |
671 | ret = bdrv_open(bs, old_filename, flags, old_drv); |
672 | if (ret != 0) { | |
6106e249 | 673 | error_set(errp, QERR_OPEN_FILE_FAILED, old_filename); |
52f9a172 | 674 | } else { |
6106e249 | 675 | error_set(errp, QERR_OPEN_FILE_FAILED, snapshot_file); |
52f9a172 | 676 | } |
f8882568 | 677 | } |
f8882568 JS |
678 | } |
679 | ||
92d48558 | 680 | static void eject_device(BlockDriverState *bs, int force, Error **errp) |
666daa68 | 681 | { |
2d3735d3 SH |
682 | if (bdrv_in_use(bs)) { |
683 | error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); | |
684 | return; | |
685 | } | |
2c6942fa | 686 | if (!bdrv_dev_has_removable_media(bs)) { |
92d48558 LC |
687 | error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
688 | return; | |
ea8f942f | 689 | } |
92d48558 | 690 | |
025ccaa7 PB |
691 | if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { |
692 | bdrv_dev_eject_request(bs, force); | |
693 | if (!force) { | |
92d48558 LC |
694 | error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
695 | return; | |
025ccaa7 | 696 | } |
666daa68 | 697 | } |
92d48558 | 698 | |
3b5276b5 | 699 | bdrv_close(bs); |
666daa68 MA |
700 | } |
701 | ||
c245b6a3 | 702 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
666daa68 MA |
703 | { |
704 | BlockDriverState *bs; | |
666daa68 | 705 | |
c245b6a3 | 706 | bs = bdrv_find(device); |
666daa68 | 707 | if (!bs) { |
c245b6a3 LC |
708 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
709 | return; | |
92d48558 LC |
710 | } |
711 | ||
c245b6a3 | 712 | eject_device(bs, force, errp); |
666daa68 MA |
713 | } |
714 | ||
a4dea8a9 | 715 | void qmp_block_passwd(const char *device, const char *password, Error **errp) |
666daa68 MA |
716 | { |
717 | BlockDriverState *bs; | |
718 | int err; | |
719 | ||
a4dea8a9 | 720 | bs = bdrv_find(device); |
666daa68 | 721 | if (!bs) { |
a4dea8a9 LC |
722 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
723 | return; | |
666daa68 MA |
724 | } |
725 | ||
a4dea8a9 | 726 | err = bdrv_set_key(bs, password); |
666daa68 | 727 | if (err == -EINVAL) { |
a4dea8a9 LC |
728 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
729 | return; | |
666daa68 | 730 | } else if (err < 0) { |
a4dea8a9 LC |
731 | error_set(errp, QERR_INVALID_PASSWORD); |
732 | return; | |
666daa68 | 733 | } |
666daa68 MA |
734 | } |
735 | ||
333a96ec LC |
736 | static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
737 | int bdrv_flags, BlockDriver *drv, | |
738 | const char *password, Error **errp) | |
739 | { | |
740 | if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { | |
741 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
742 | return; | |
743 | } | |
744 | ||
745 | if (bdrv_key_required(bs)) { | |
746 | if (password) { | |
747 | if (bdrv_set_key(bs, password) < 0) { | |
748 | error_set(errp, QERR_INVALID_PASSWORD); | |
749 | } | |
750 | } else { | |
751 | error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), | |
752 | bdrv_get_encrypted_filename(bs)); | |
753 | } | |
754 | } else if (password) { | |
755 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
756 | } | |
757 | } | |
758 | ||
759 | void qmp_change_blockdev(const char *device, const char *filename, | |
760 | bool has_format, const char *format, Error **errp) | |
666daa68 MA |
761 | { |
762 | BlockDriverState *bs; | |
763 | BlockDriver *drv = NULL; | |
764 | int bdrv_flags; | |
92d48558 | 765 | Error *err = NULL; |
666daa68 MA |
766 | |
767 | bs = bdrv_find(device); | |
768 | if (!bs) { | |
333a96ec LC |
769 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
770 | return; | |
666daa68 | 771 | } |
333a96ec LC |
772 | |
773 | if (format) { | |
774 | drv = bdrv_find_whitelisted_format(format); | |
666daa68 | 775 | if (!drv) { |
333a96ec LC |
776 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
777 | return; | |
666daa68 MA |
778 | } |
779 | } | |
333a96ec | 780 | |
92d48558 LC |
781 | eject_device(bs, 0, &err); |
782 | if (error_is_set(&err)) { | |
333a96ec LC |
783 | error_propagate(errp, err); |
784 | return; | |
666daa68 | 785 | } |
333a96ec | 786 | |
528f7663 | 787 | bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; |
199630b6 | 788 | bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; |
333a96ec LC |
789 | |
790 | qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); | |
666daa68 | 791 | } |
9063f814 | 792 | |
727f005e | 793 | /* throttling disk I/O limits */ |
80047da5 LC |
794 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
795 | int64_t bps_wr, int64_t iops, int64_t iops_rd, | |
796 | int64_t iops_wr, Error **errp) | |
727f005e ZYW |
797 | { |
798 | BlockIOLimit io_limits; | |
727f005e ZYW |
799 | BlockDriverState *bs; |
800 | ||
80047da5 | 801 | bs = bdrv_find(device); |
727f005e | 802 | if (!bs) { |
80047da5 LC |
803 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
804 | return; | |
727f005e ZYW |
805 | } |
806 | ||
80047da5 LC |
807 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; |
808 | io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; | |
809 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; | |
810 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; | |
811 | io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; | |
812 | io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; | |
727f005e ZYW |
813 | |
814 | if (!do_check_io_limits(&io_limits)) { | |
80047da5 LC |
815 | error_set(errp, QERR_INVALID_PARAMETER_COMBINATION); |
816 | return; | |
727f005e ZYW |
817 | } |
818 | ||
819 | bs->io_limits = io_limits; | |
820 | bs->slice_time = BLOCK_IO_SLICE_TIME; | |
821 | ||
822 | if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { | |
823 | bdrv_io_limits_enable(bs); | |
824 | } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { | |
825 | bdrv_io_limits_disable(bs); | |
826 | } else { | |
827 | if (bs->block_timer) { | |
828 | qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); | |
829 | } | |
830 | } | |
727f005e ZYW |
831 | } |
832 | ||
9063f814 RH |
833 | int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
834 | { | |
835 | const char *id = qdict_get_str(qdict, "id"); | |
836 | BlockDriverState *bs; | |
9063f814 RH |
837 | |
838 | bs = bdrv_find(id); | |
839 | if (!bs) { | |
840 | qerror_report(QERR_DEVICE_NOT_FOUND, id); | |
841 | return -1; | |
842 | } | |
8591675f MT |
843 | if (bdrv_in_use(bs)) { |
844 | qerror_report(QERR_DEVICE_IN_USE, id); | |
845 | return -1; | |
846 | } | |
9063f814 RH |
847 | |
848 | /* quiesce block driver; prevent further io */ | |
922453bc | 849 | bdrv_drain_all(); |
9063f814 RH |
850 | bdrv_flush(bs); |
851 | bdrv_close(bs); | |
852 | ||
fa879d62 | 853 | /* if we have a device attached to this BlockDriverState |
d22b2f41 RH |
854 | * then we need to make the drive anonymous until the device |
855 | * can be removed. If this is a drive with no device backing | |
856 | * then we can just get rid of the block driver state right here. | |
857 | */ | |
fa879d62 | 858 | if (bdrv_get_attached_dev(bs)) { |
d22b2f41 RH |
859 | bdrv_make_anon(bs); |
860 | } else { | |
861 | drive_uninit(drive_get_by_blockdev(bs)); | |
9063f814 RH |
862 | } |
863 | ||
9063f814 RH |
864 | return 0; |
865 | } | |
6d4a2b3a | 866 | |
5e7caacb | 867 | void qmp_block_resize(const char *device, int64_t size, Error **errp) |
6d4a2b3a | 868 | { |
6d4a2b3a CH |
869 | BlockDriverState *bs; |
870 | ||
871 | bs = bdrv_find(device); | |
872 | if (!bs) { | |
5e7caacb LC |
873 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
874 | return; | |
6d4a2b3a CH |
875 | } |
876 | ||
877 | if (size < 0) { | |
939a1cc3 | 878 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
5e7caacb | 879 | return; |
6d4a2b3a CH |
880 | } |
881 | ||
939a1cc3 SH |
882 | switch (bdrv_truncate(bs, size)) { |
883 | case 0: | |
884 | break; | |
885 | case -ENOMEDIUM: | |
886 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
887 | break; | |
888 | case -ENOTSUP: | |
889 | error_set(errp, QERR_UNSUPPORTED); | |
890 | break; | |
891 | case -EACCES: | |
892 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
893 | break; | |
894 | case -EBUSY: | |
895 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
896 | break; | |
897 | default: | |
5e7caacb | 898 | error_set(errp, QERR_UNDEFINED_ERROR); |
939a1cc3 | 899 | break; |
6d4a2b3a | 900 | } |
6d4a2b3a | 901 | } |
12bd451f SH |
902 | |
903 | static QObject *qobject_from_block_job(BlockJob *job) | |
904 | { | |
905 | return qobject_from_jsonf("{ 'type': %s," | |
906 | "'device': %s," | |
907 | "'len': %" PRId64 "," | |
908 | "'offset': %" PRId64 "," | |
909 | "'speed': %" PRId64 " }", | |
910 | job->job_type->job_type, | |
911 | bdrv_get_device_name(job->bs), | |
912 | job->len, | |
913 | job->offset, | |
914 | job->speed); | |
915 | } | |
916 | ||
917 | static void block_stream_cb(void *opaque, int ret) | |
918 | { | |
919 | BlockDriverState *bs = opaque; | |
920 | QObject *obj; | |
921 | ||
922 | trace_block_stream_cb(bs, bs->job, ret); | |
923 | ||
924 | assert(bs->job); | |
925 | obj = qobject_from_block_job(bs->job); | |
926 | if (ret < 0) { | |
927 | QDict *dict = qobject_to_qdict(obj); | |
928 | qdict_put(dict, "error", qstring_from_str(strerror(-ret))); | |
929 | } | |
930 | ||
931 | monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); | |
932 | qobject_decref(obj); | |
933 | } | |
934 | ||
935 | void qmp_block_stream(const char *device, bool has_base, | |
936 | const char *base, Error **errp) | |
937 | { | |
938 | BlockDriverState *bs; | |
939 | int ret; | |
940 | ||
941 | bs = bdrv_find(device); | |
942 | if (!bs) { | |
943 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
944 | return; | |
945 | } | |
946 | ||
947 | /* Base device not supported */ | |
948 | if (base) { | |
949 | error_set(errp, QERR_NOT_SUPPORTED); | |
950 | return; | |
951 | } | |
952 | ||
953 | ret = stream_start(bs, NULL, block_stream_cb, bs); | |
954 | if (ret < 0) { | |
955 | switch (ret) { | |
956 | case -EBUSY: | |
957 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
958 | return; | |
959 | default: | |
960 | error_set(errp, QERR_NOT_SUPPORTED); | |
961 | return; | |
962 | } | |
963 | } | |
964 | ||
965 | trace_qmp_block_stream(bs, bs->job); | |
966 | } | |
2d47c6e9 SH |
967 | |
968 | static BlockJob *find_block_job(const char *device) | |
969 | { | |
970 | BlockDriverState *bs; | |
971 | ||
972 | bs = bdrv_find(device); | |
973 | if (!bs || !bs->job) { | |
974 | return NULL; | |
975 | } | |
976 | return bs->job; | |
977 | } | |
978 | ||
979 | void qmp_block_job_set_speed(const char *device, int64_t value, Error **errp) | |
980 | { | |
981 | BlockJob *job = find_block_job(device); | |
982 | ||
983 | if (!job) { | |
984 | error_set(errp, QERR_DEVICE_NOT_ACTIVE, device); | |
985 | return; | |
986 | } | |
987 | ||
988 | if (block_job_set_speed(job, value) < 0) { | |
989 | error_set(errp, QERR_NOT_SUPPORTED); | |
990 | } | |
991 | } |