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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" |
c9344f22 | 21 | #include "arch_init.h" |
666daa68 | 22 | |
c9b62a7e | 23 | static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); |
666daa68 | 24 | |
1960966d MA |
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] = { | |
27d6bf40 MA |
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, | |
1960966d MA |
54 | }; |
55 | ||
14bafc54 MA |
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 | ||
0fc0f1fa RH |
67 | if (dinfo) { |
68 | dinfo->auto_del = 1; | |
69 | } | |
14bafc54 MA |
70 | } |
71 | ||
72 | void blockdev_auto_del(BlockDriverState *bs) | |
73 | { | |
74 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
75 | ||
0fc0f1fa | 76 | if (dinfo && dinfo->auto_del) { |
84fb3925 | 77 | drive_put_ref(dinfo); |
14bafc54 MA |
78 | } |
79 | } | |
80 | ||
505a7fb1 MA |
81 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
82 | { | |
83 | int max_devs = if_max_devs[type]; | |
84 | return max_devs ? index / max_devs : 0; | |
85 | } | |
86 | ||
87 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
88 | { | |
89 | int max_devs = if_max_devs[type]; | |
90 | return max_devs ? index % max_devs : index; | |
91 | } | |
92 | ||
2292ddae MA |
93 | QemuOpts *drive_def(const char *optstr) |
94 | { | |
95 | return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); | |
96 | } | |
97 | ||
98 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
5645b0f4 | 99 | const char *optstr) |
666daa68 | 100 | { |
666daa68 | 101 | QemuOpts *opts; |
2292ddae | 102 | char buf[32]; |
666daa68 | 103 | |
2292ddae | 104 | opts = drive_def(optstr); |
666daa68 MA |
105 | if (!opts) { |
106 | return NULL; | |
107 | } | |
2292ddae MA |
108 | if (type != IF_DEFAULT) { |
109 | qemu_opt_set(opts, "if", if_name[type]); | |
110 | } | |
111 | if (index >= 0) { | |
112 | snprintf(buf, sizeof(buf), "%d", index); | |
113 | qemu_opt_set(opts, "index", buf); | |
114 | } | |
666daa68 MA |
115 | if (file) |
116 | qemu_opt_set(opts, "file", file); | |
117 | return opts; | |
118 | } | |
119 | ||
120 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
121 | { | |
122 | DriveInfo *dinfo; | |
123 | ||
124 | /* seek interface, bus and unit */ | |
125 | ||
126 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
127 | if (dinfo->type == type && | |
128 | dinfo->bus == bus && | |
129 | dinfo->unit == unit) | |
130 | return dinfo; | |
131 | } | |
132 | ||
133 | return NULL; | |
134 | } | |
135 | ||
f1bd51ac MA |
136 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
137 | { | |
138 | return drive_get(type, | |
139 | drive_index_to_bus_id(type, index), | |
140 | drive_index_to_unit_id(type, index)); | |
141 | } | |
142 | ||
666daa68 MA |
143 | int drive_get_max_bus(BlockInterfaceType type) |
144 | { | |
145 | int max_bus; | |
146 | DriveInfo *dinfo; | |
147 | ||
148 | max_bus = -1; | |
149 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
150 | if(dinfo->type == type && | |
151 | dinfo->bus > max_bus) | |
152 | max_bus = dinfo->bus; | |
153 | } | |
154 | return max_bus; | |
155 | } | |
156 | ||
13839974 MA |
157 | /* Get a block device. This should only be used for single-drive devices |
158 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
159 | appropriate bus. */ | |
160 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
161 | { | |
162 | static int next_block_unit[IF_COUNT]; | |
163 | ||
164 | return drive_get(type, 0, next_block_unit[type]++); | |
165 | } | |
166 | ||
e4700e59 | 167 | DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) |
666daa68 MA |
168 | { |
169 | DriveInfo *dinfo; | |
170 | ||
171 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
e4700e59 MA |
172 | if (dinfo->bdrv == bs) { |
173 | return dinfo; | |
174 | } | |
666daa68 | 175 | } |
e4700e59 | 176 | return NULL; |
666daa68 MA |
177 | } |
178 | ||
666daa68 MA |
179 | static void bdrv_format_print(void *opaque, const char *name) |
180 | { | |
807105a7 | 181 | error_printf(" %s", name); |
666daa68 MA |
182 | } |
183 | ||
84fb3925 | 184 | static void drive_uninit(DriveInfo *dinfo) |
666daa68 MA |
185 | { |
186 | qemu_opts_del(dinfo->opts); | |
187 | bdrv_delete(dinfo->bdrv); | |
7267c094 | 188 | g_free(dinfo->id); |
666daa68 | 189 | QTAILQ_REMOVE(&drives, dinfo, next); |
7267c094 | 190 | g_free(dinfo); |
666daa68 MA |
191 | } |
192 | ||
84fb3925 MT |
193 | void drive_put_ref(DriveInfo *dinfo) |
194 | { | |
195 | assert(dinfo->refcount); | |
196 | if (--dinfo->refcount == 0) { | |
197 | drive_uninit(dinfo); | |
198 | } | |
199 | } | |
200 | ||
201 | void drive_get_ref(DriveInfo *dinfo) | |
202 | { | |
203 | dinfo->refcount++; | |
204 | } | |
205 | ||
aa398a5c SH |
206 | typedef struct { |
207 | QEMUBH *bh; | |
208 | DriveInfo *dinfo; | |
209 | } DrivePutRefBH; | |
210 | ||
211 | static void drive_put_ref_bh(void *opaque) | |
212 | { | |
213 | DrivePutRefBH *s = opaque; | |
214 | ||
215 | drive_put_ref(s->dinfo); | |
216 | qemu_bh_delete(s->bh); | |
217 | g_free(s); | |
218 | } | |
219 | ||
220 | /* | |
221 | * Release a drive reference in a BH | |
222 | * | |
223 | * It is not possible to use drive_put_ref() from a callback function when the | |
224 | * callers still need the drive. In such cases we schedule a BH to release the | |
225 | * reference. | |
226 | */ | |
227 | static void drive_put_ref_bh_schedule(DriveInfo *dinfo) | |
228 | { | |
229 | DrivePutRefBH *s; | |
230 | ||
231 | s = g_new(DrivePutRefBH, 1); | |
232 | s->bh = qemu_bh_new(drive_put_ref_bh, s); | |
233 | s->dinfo = dinfo; | |
234 | qemu_bh_schedule(s->bh); | |
235 | } | |
236 | ||
666daa68 MA |
237 | static int parse_block_error_action(const char *buf, int is_read) |
238 | { | |
239 | if (!strcmp(buf, "ignore")) { | |
240 | return BLOCK_ERR_IGNORE; | |
241 | } else if (!is_read && !strcmp(buf, "enospc")) { | |
242 | return BLOCK_ERR_STOP_ENOSPC; | |
243 | } else if (!strcmp(buf, "stop")) { | |
244 | return BLOCK_ERR_STOP_ANY; | |
245 | } else if (!strcmp(buf, "report")) { | |
246 | return BLOCK_ERR_REPORT; | |
247 | } else { | |
807105a7 MA |
248 | error_report("'%s' invalid %s error action", |
249 | buf, is_read ? "read" : "write"); | |
666daa68 MA |
250 | return -1; |
251 | } | |
252 | } | |
253 | ||
0563e191 ZYW |
254 | static bool do_check_io_limits(BlockIOLimit *io_limits) |
255 | { | |
256 | bool bps_flag; | |
257 | bool iops_flag; | |
258 | ||
259 | assert(io_limits); | |
260 | ||
261 | bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0) | |
262 | && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0) | |
263 | || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0)); | |
264 | iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0) | |
265 | && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0) | |
266 | || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0)); | |
267 | if (bps_flag || iops_flag) { | |
268 | return false; | |
269 | } | |
270 | ||
271 | return true; | |
272 | } | |
273 | ||
319ae529 | 274 | DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi) |
666daa68 MA |
275 | { |
276 | const char *buf; | |
277 | const char *file = NULL; | |
278 | char devname[128]; | |
279 | const char *serial; | |
280 | const char *mediastr = ""; | |
281 | BlockInterfaceType type; | |
282 | enum { MEDIA_DISK, MEDIA_CDROM } media; | |
283 | int bus_id, unit_id; | |
284 | int cyls, heads, secs, translation; | |
285 | BlockDriver *drv = NULL; | |
286 | int max_devs; | |
287 | int index; | |
288 | int ro = 0; | |
289 | int bdrv_flags = 0; | |
290 | int on_read_error, on_write_error; | |
291 | const char *devaddr; | |
292 | DriveInfo *dinfo; | |
0563e191 | 293 | BlockIOLimit io_limits; |
666daa68 | 294 | int snapshot = 0; |
fb0490f6 | 295 | bool copy_on_read; |
666daa68 MA |
296 | int ret; |
297 | ||
666daa68 | 298 | translation = BIOS_ATA_TRANSLATION_AUTO; |
666daa68 MA |
299 | media = MEDIA_DISK; |
300 | ||
301 | /* extract parameters */ | |
302 | bus_id = qemu_opt_get_number(opts, "bus", 0); | |
303 | unit_id = qemu_opt_get_number(opts, "unit", -1); | |
304 | index = qemu_opt_get_number(opts, "index", -1); | |
305 | ||
306 | cyls = qemu_opt_get_number(opts, "cyls", 0); | |
307 | heads = qemu_opt_get_number(opts, "heads", 0); | |
308 | secs = qemu_opt_get_number(opts, "secs", 0); | |
309 | ||
310 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); | |
311 | ro = qemu_opt_get_bool(opts, "readonly", 0); | |
fb0490f6 | 312 | copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
666daa68 MA |
313 | |
314 | file = qemu_opt_get(opts, "file"); | |
315 | serial = qemu_opt_get(opts, "serial"); | |
316 | ||
317 | if ((buf = qemu_opt_get(opts, "if")) != NULL) { | |
318 | pstrcpy(devname, sizeof(devname), buf); | |
1960966d MA |
319 | for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
320 | ; | |
321 | if (type == IF_COUNT) { | |
807105a7 | 322 | error_report("unsupported bus type '%s'", buf); |
666daa68 MA |
323 | return NULL; |
324 | } | |
2d3999fe LC |
325 | } else { |
326 | type = default_to_scsi ? IF_SCSI : IF_IDE; | |
327 | pstrcpy(devname, sizeof(devname), if_name[type]); | |
666daa68 | 328 | } |
2d3999fe | 329 | |
1960966d | 330 | max_devs = if_max_devs[type]; |
666daa68 MA |
331 | |
332 | if (cyls || heads || secs) { | |
333 | if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { | |
807105a7 | 334 | error_report("invalid physical cyls number"); |
666daa68 MA |
335 | return NULL; |
336 | } | |
337 | if (heads < 1 || (type == IF_IDE && heads > 16)) { | |
807105a7 | 338 | error_report("invalid physical heads number"); |
666daa68 MA |
339 | return NULL; |
340 | } | |
341 | if (secs < 1 || (type == IF_IDE && secs > 63)) { | |
807105a7 | 342 | error_report("invalid physical secs number"); |
666daa68 MA |
343 | return NULL; |
344 | } | |
345 | } | |
346 | ||
347 | if ((buf = qemu_opt_get(opts, "trans")) != NULL) { | |
348 | if (!cyls) { | |
e4080f9b | 349 | error_report("'%s' trans must be used with cyls, heads and secs", |
807105a7 | 350 | buf); |
666daa68 MA |
351 | return NULL; |
352 | } | |
353 | if (!strcmp(buf, "none")) | |
354 | translation = BIOS_ATA_TRANSLATION_NONE; | |
355 | else if (!strcmp(buf, "lba")) | |
356 | translation = BIOS_ATA_TRANSLATION_LBA; | |
357 | else if (!strcmp(buf, "auto")) | |
358 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
359 | else { | |
807105a7 | 360 | error_report("'%s' invalid translation type", buf); |
666daa68 MA |
361 | return NULL; |
362 | } | |
363 | } | |
364 | ||
365 | if ((buf = qemu_opt_get(opts, "media")) != NULL) { | |
366 | if (!strcmp(buf, "disk")) { | |
367 | media = MEDIA_DISK; | |
368 | } else if (!strcmp(buf, "cdrom")) { | |
369 | if (cyls || secs || heads) { | |
e7ff8f0e | 370 | error_report("CHS can't be set with media=%s", buf); |
666daa68 MA |
371 | return NULL; |
372 | } | |
373 | media = MEDIA_CDROM; | |
374 | } else { | |
807105a7 | 375 | error_report("'%s' invalid media", buf); |
666daa68 MA |
376 | return NULL; |
377 | } | |
378 | } | |
379 | ||
380 | if ((buf = qemu_opt_get(opts, "cache")) != NULL) { | |
c3993cdc SH |
381 | if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { |
382 | error_report("invalid cache option"); | |
383 | return NULL; | |
666daa68 MA |
384 | } |
385 | } | |
386 | ||
387 | #ifdef CONFIG_LINUX_AIO | |
388 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
389 | if (!strcmp(buf, "native")) { | |
390 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
391 | } else if (!strcmp(buf, "threads")) { | |
392 | /* this is the default */ | |
393 | } else { | |
807105a7 | 394 | error_report("invalid aio option"); |
666daa68 MA |
395 | return NULL; |
396 | } | |
397 | } | |
398 | #endif | |
399 | ||
400 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
401 | if (strcmp(buf, "?") == 0) { | |
807105a7 MA |
402 | error_printf("Supported formats:"); |
403 | bdrv_iterate_format(bdrv_format_print, NULL); | |
404 | error_printf("\n"); | |
405 | return NULL; | |
666daa68 MA |
406 | } |
407 | drv = bdrv_find_whitelisted_format(buf); | |
408 | if (!drv) { | |
807105a7 | 409 | error_report("'%s' invalid format", buf); |
666daa68 MA |
410 | return NULL; |
411 | } | |
412 | } | |
413 | ||
0563e191 ZYW |
414 | /* disk I/O throttling */ |
415 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = | |
416 | qemu_opt_get_number(opts, "bps", 0); | |
417 | io_limits.bps[BLOCK_IO_LIMIT_READ] = | |
418 | qemu_opt_get_number(opts, "bps_rd", 0); | |
419 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = | |
420 | qemu_opt_get_number(opts, "bps_wr", 0); | |
421 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = | |
422 | qemu_opt_get_number(opts, "iops", 0); | |
423 | io_limits.iops[BLOCK_IO_LIMIT_READ] = | |
424 | qemu_opt_get_number(opts, "iops_rd", 0); | |
425 | io_limits.iops[BLOCK_IO_LIMIT_WRITE] = | |
426 | qemu_opt_get_number(opts, "iops_wr", 0); | |
427 | ||
428 | if (!do_check_io_limits(&io_limits)) { | |
429 | error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) " | |
430 | "cannot be used at the same time"); | |
431 | return NULL; | |
432 | } | |
433 | ||
666daa68 MA |
434 | on_write_error = BLOCK_ERR_STOP_ENOSPC; |
435 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { | |
436 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) { | |
807105a7 | 437 | error_report("werror is not supported by this bus type"); |
666daa68 MA |
438 | return NULL; |
439 | } | |
440 | ||
441 | on_write_error = parse_block_error_action(buf, 0); | |
442 | if (on_write_error < 0) { | |
443 | return NULL; | |
444 | } | |
445 | } | |
446 | ||
447 | on_read_error = BLOCK_ERR_REPORT; | |
448 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { | |
5dba48a8 | 449 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) { |
807105a7 | 450 | error_report("rerror is not supported by this bus type"); |
666daa68 MA |
451 | return NULL; |
452 | } | |
453 | ||
454 | on_read_error = parse_block_error_action(buf, 1); | |
455 | if (on_read_error < 0) { | |
456 | return NULL; | |
457 | } | |
458 | } | |
459 | ||
460 | if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { | |
461 | if (type != IF_VIRTIO) { | |
807105a7 | 462 | error_report("addr is not supported by this bus type"); |
666daa68 MA |
463 | return NULL; |
464 | } | |
465 | } | |
466 | ||
467 | /* compute bus and unit according index */ | |
468 | ||
469 | if (index != -1) { | |
470 | if (bus_id != 0 || unit_id != -1) { | |
807105a7 | 471 | error_report("index cannot be used with bus and unit"); |
666daa68 MA |
472 | return NULL; |
473 | } | |
505a7fb1 MA |
474 | bus_id = drive_index_to_bus_id(type, index); |
475 | unit_id = drive_index_to_unit_id(type, index); | |
666daa68 MA |
476 | } |
477 | ||
478 | /* if user doesn't specify a unit_id, | |
479 | * try to find the first free | |
480 | */ | |
481 | ||
482 | if (unit_id == -1) { | |
483 | unit_id = 0; | |
484 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
485 | unit_id++; | |
486 | if (max_devs && unit_id >= max_devs) { | |
487 | unit_id -= max_devs; | |
488 | bus_id++; | |
489 | } | |
490 | } | |
491 | } | |
492 | ||
493 | /* check unit id */ | |
494 | ||
495 | if (max_devs && unit_id >= max_devs) { | |
807105a7 MA |
496 | error_report("unit %d too big (max is %d)", |
497 | unit_id, max_devs - 1); | |
666daa68 MA |
498 | return NULL; |
499 | } | |
500 | ||
501 | /* | |
4e5d9b57 | 502 | * catch multiple definitions |
666daa68 MA |
503 | */ |
504 | ||
505 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
4e5d9b57 MA |
506 | error_report("drive with bus=%d, unit=%d (index=%d) exists", |
507 | bus_id, unit_id, index); | |
666daa68 MA |
508 | return NULL; |
509 | } | |
510 | ||
511 | /* init */ | |
512 | ||
7267c094 | 513 | dinfo = g_malloc0(sizeof(*dinfo)); |
666daa68 | 514 | if ((buf = qemu_opts_id(opts)) != NULL) { |
7267c094 | 515 | dinfo->id = g_strdup(buf); |
666daa68 MA |
516 | } else { |
517 | /* no id supplied -> create one */ | |
7267c094 | 518 | dinfo->id = g_malloc0(32); |
666daa68 MA |
519 | if (type == IF_IDE || type == IF_SCSI) |
520 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
521 | if (max_devs) | |
522 | snprintf(dinfo->id, 32, "%s%i%s%i", | |
523 | devname, bus_id, mediastr, unit_id); | |
524 | else | |
525 | snprintf(dinfo->id, 32, "%s%s%i", | |
526 | devname, mediastr, unit_id); | |
527 | } | |
528 | dinfo->bdrv = bdrv_new(dinfo->id); | |
529 | dinfo->devaddr = devaddr; | |
530 | dinfo->type = type; | |
531 | dinfo->bus = bus_id; | |
532 | dinfo->unit = unit_id; | |
666daa68 | 533 | dinfo->opts = opts; |
84fb3925 | 534 | dinfo->refcount = 1; |
666daa68 | 535 | if (serial) |
653dbec7 | 536 | strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); |
666daa68 MA |
537 | QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
538 | ||
abd7f68d MA |
539 | bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
540 | ||
0563e191 ZYW |
541 | /* disk I/O throttling */ |
542 | bdrv_set_io_limits(dinfo->bdrv, &io_limits); | |
543 | ||
666daa68 MA |
544 | switch(type) { |
545 | case IF_IDE: | |
546 | case IF_SCSI: | |
547 | case IF_XEN: | |
548 | case IF_NONE: | |
549 | switch(media) { | |
550 | case MEDIA_DISK: | |
551 | if (cyls != 0) { | |
552 | bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); | |
553 | bdrv_set_translation_hint(dinfo->bdrv, translation); | |
554 | } | |
555 | break; | |
556 | case MEDIA_CDROM: | |
95b5edcd | 557 | dinfo->media_cd = 1; |
666daa68 MA |
558 | break; |
559 | } | |
560 | break; | |
561 | case IF_SD: | |
666daa68 | 562 | case IF_FLOPPY: |
666daa68 MA |
563 | case IF_PFLASH: |
564 | case IF_MTD: | |
565 | break; | |
566 | case IF_VIRTIO: | |
567 | /* add virtio block device */ | |
3329f07b | 568 | opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); |
eeb9c1b5 AL |
569 | if (arch_type == QEMU_ARCH_S390X) { |
570 | qemu_opt_set(opts, "driver", "virtio-blk-s390"); | |
571 | } else { | |
572 | qemu_opt_set(opts, "driver", "virtio-blk-pci"); | |
573 | } | |
666daa68 MA |
574 | qemu_opt_set(opts, "drive", dinfo->id); |
575 | if (devaddr) | |
576 | qemu_opt_set(opts, "addr", devaddr); | |
577 | break; | |
2292ddae | 578 | default: |
666daa68 MA |
579 | abort(); |
580 | } | |
dd5b0d71 | 581 | if (!file || !*file) { |
319ae529 | 582 | return dinfo; |
666daa68 MA |
583 | } |
584 | if (snapshot) { | |
585 | /* always use cache=unsafe with snapshot */ | |
586 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
587 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
588 | } | |
589 | ||
fb0490f6 SH |
590 | if (copy_on_read) { |
591 | bdrv_flags |= BDRV_O_COPY_ON_READ; | |
592 | } | |
593 | ||
666daa68 MA |
594 | if (media == MEDIA_CDROM) { |
595 | /* CDROM is fine for any interface, don't check. */ | |
596 | ro = 1; | |
597 | } else if (ro == 1) { | |
1e9eb78a JJ |
598 | if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && |
599 | type != IF_NONE && type != IF_PFLASH) { | |
807105a7 | 600 | error_report("readonly not supported by this bus type"); |
a9ae2bff | 601 | goto err; |
666daa68 MA |
602 | } |
603 | } | |
604 | ||
605 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; | |
606 | ||
607 | ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); | |
608 | if (ret < 0) { | |
807105a7 MA |
609 | error_report("could not open disk image %s: %s", |
610 | file, strerror(-ret)); | |
a9ae2bff | 611 | goto err; |
666daa68 MA |
612 | } |
613 | ||
614 | if (bdrv_key_required(dinfo->bdrv)) | |
615 | autostart = 0; | |
666daa68 | 616 | return dinfo; |
a9ae2bff MA |
617 | |
618 | err: | |
619 | bdrv_delete(dinfo->bdrv); | |
7267c094 | 620 | g_free(dinfo->id); |
a9ae2bff | 621 | QTAILQ_REMOVE(&drives, dinfo, next); |
7267c094 | 622 | g_free(dinfo); |
a9ae2bff | 623 | return NULL; |
666daa68 MA |
624 | } |
625 | ||
626 | void do_commit(Monitor *mon, const QDict *qdict) | |
627 | { | |
666daa68 | 628 | const char *device = qdict_get_str(qdict, "device"); |
6ab4b5ab | 629 | BlockDriverState *bs; |
e8877497 | 630 | int ret; |
666daa68 | 631 | |
6ab4b5ab | 632 | if (!strcmp(device, "all")) { |
e8877497 SH |
633 | ret = bdrv_commit_all(); |
634 | if (ret == -EBUSY) { | |
635 | qerror_report(QERR_DEVICE_IN_USE, device); | |
636 | return; | |
637 | } | |
6ab4b5ab MA |
638 | } else { |
639 | bs = bdrv_find(device); | |
ac59eb95 MA |
640 | if (!bs) { |
641 | qerror_report(QERR_DEVICE_NOT_FOUND, device); | |
642 | return; | |
6ab4b5ab | 643 | } |
2d3735d3 SH |
644 | ret = bdrv_commit(bs); |
645 | if (ret == -EBUSY) { | |
646 | qerror_report(QERR_DEVICE_IN_USE, device); | |
647 | return; | |
648 | } | |
666daa68 MA |
649 | } |
650 | } | |
651 | ||
6106e249 LC |
652 | void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
653 | bool has_format, const char *format, | |
654 | Error **errp) | |
f8882568 | 655 | { |
f8882568 | 656 | BlockDriverState *bs; |
52f9a172 | 657 | BlockDriver *drv, *old_drv, *proto_drv; |
f8882568 JS |
658 | int ret = 0; |
659 | int flags; | |
52f9a172 | 660 | char old_filename[1024]; |
f8882568 JS |
661 | |
662 | bs = bdrv_find(device); | |
663 | if (!bs) { | |
6106e249 LC |
664 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
665 | return; | |
f8882568 | 666 | } |
2d3735d3 SH |
667 | if (bdrv_in_use(bs)) { |
668 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
669 | return; | |
670 | } | |
f8882568 | 671 | |
52f9a172 JS |
672 | pstrcpy(old_filename, sizeof(old_filename), bs->filename); |
673 | ||
674 | old_drv = bs->drv; | |
675 | flags = bs->open_flags; | |
676 | ||
6106e249 | 677 | if (!has_format) { |
f8882568 JS |
678 | format = "qcow2"; |
679 | } | |
680 | ||
681 | drv = bdrv_find_format(format); | |
682 | if (!drv) { | |
6106e249 LC |
683 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
684 | return; | |
f8882568 JS |
685 | } |
686 | ||
6106e249 | 687 | proto_drv = bdrv_find_protocol(snapshot_file); |
f8882568 | 688 | if (!proto_drv) { |
6106e249 LC |
689 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
690 | return; | |
f8882568 JS |
691 | } |
692 | ||
6106e249 | 693 | ret = bdrv_img_create(snapshot_file, format, bs->filename, |
52f9a172 | 694 | bs->drv->format_name, NULL, -1, flags); |
f8882568 | 695 | if (ret) { |
6106e249 LC |
696 | error_set(errp, QERR_UNDEFINED_ERROR); |
697 | return; | |
f8882568 JS |
698 | } |
699 | ||
922453bc | 700 | bdrv_drain_all(); |
f8882568 JS |
701 | bdrv_flush(bs); |
702 | ||
f8882568 | 703 | bdrv_close(bs); |
6106e249 | 704 | ret = bdrv_open(bs, snapshot_file, flags, drv); |
f8882568 | 705 | /* |
52f9a172 JS |
706 | * If reopening the image file we just created fails, fall back |
707 | * and try to re-open the original image. If that fails too, we | |
708 | * are in serious trouble. | |
f8882568 JS |
709 | */ |
710 | if (ret != 0) { | |
52f9a172 JS |
711 | ret = bdrv_open(bs, old_filename, flags, old_drv); |
712 | if (ret != 0) { | |
6106e249 | 713 | error_set(errp, QERR_OPEN_FILE_FAILED, old_filename); |
52f9a172 | 714 | } else { |
6106e249 | 715 | error_set(errp, QERR_OPEN_FILE_FAILED, snapshot_file); |
52f9a172 | 716 | } |
f8882568 | 717 | } |
f8882568 JS |
718 | } |
719 | ||
8802d1fd JC |
720 | |
721 | /* New and old BlockDriverState structs for group snapshots */ | |
722 | typedef struct BlkGroupSnapshotStates { | |
723 | BlockDriverState *old_bs; | |
724 | BlockDriverState *new_bs; | |
725 | QSIMPLEQ_ENTRY(BlkGroupSnapshotStates) entry; | |
726 | } BlkGroupSnapshotStates; | |
727 | ||
728 | /* | |
729 | * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail | |
730 | * then we do not pivot any of the devices in the group, and abandon the | |
731 | * snapshots | |
732 | */ | |
733 | void qmp_blockdev_group_snapshot_sync(SnapshotDevList *dev_list, | |
734 | Error **errp) | |
735 | { | |
736 | int ret = 0; | |
737 | SnapshotDevList *dev_entry = dev_list; | |
738 | SnapshotDev *dev_info = NULL; | |
622d2419 | 739 | BlkGroupSnapshotStates *states, *next; |
8802d1fd JC |
740 | BlockDriver *proto_drv; |
741 | BlockDriver *drv; | |
742 | int flags; | |
743 | const char *format; | |
744 | const char *snapshot_file; | |
745 | ||
746 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkGroupSnapshotStates) snap_bdrv_states; | |
747 | QSIMPLEQ_INIT(&snap_bdrv_states); | |
748 | ||
749 | /* drain all i/o before any snapshots */ | |
750 | bdrv_drain_all(); | |
751 | ||
752 | /* We don't do anything in this loop that commits us to the snapshot */ | |
753 | while (NULL != dev_entry) { | |
754 | dev_info = dev_entry->value; | |
755 | dev_entry = dev_entry->next; | |
756 | ||
757 | states = g_malloc0(sizeof(BlkGroupSnapshotStates)); | |
758 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry); | |
759 | ||
760 | states->old_bs = bdrv_find(dev_info->device); | |
761 | ||
762 | if (!states->old_bs) { | |
763 | error_set(errp, QERR_DEVICE_NOT_FOUND, dev_info->device); | |
764 | goto delete_and_fail; | |
765 | } | |
766 | ||
767 | if (bdrv_in_use(states->old_bs)) { | |
768 | error_set(errp, QERR_DEVICE_IN_USE, dev_info->device); | |
769 | goto delete_and_fail; | |
770 | } | |
771 | ||
772 | if (!bdrv_is_read_only(states->old_bs) && | |
773 | bdrv_is_inserted(states->old_bs)) { | |
774 | ||
775 | if (bdrv_flush(states->old_bs)) { | |
776 | error_set(errp, QERR_IO_ERROR); | |
777 | goto delete_and_fail; | |
778 | } | |
779 | } | |
780 | ||
781 | snapshot_file = dev_info->snapshot_file; | |
782 | ||
783 | flags = states->old_bs->open_flags; | |
784 | ||
785 | if (!dev_info->has_format) { | |
786 | format = "qcow2"; | |
787 | } else { | |
788 | format = dev_info->format; | |
789 | } | |
790 | ||
791 | drv = bdrv_find_format(format); | |
792 | if (!drv) { | |
793 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
794 | goto delete_and_fail; | |
795 | } | |
796 | ||
797 | proto_drv = bdrv_find_protocol(snapshot_file); | |
798 | if (!proto_drv) { | |
799 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
800 | goto delete_and_fail; | |
801 | } | |
802 | ||
803 | /* create new image w/backing file */ | |
804 | ret = bdrv_img_create(snapshot_file, format, | |
805 | states->old_bs->filename, | |
d0895d6e PB |
806 | states->old_bs->drv->format_name, |
807 | NULL, -1, flags); | |
8802d1fd JC |
808 | if (ret) { |
809 | error_set(errp, QERR_OPEN_FILE_FAILED, snapshot_file); | |
810 | goto delete_and_fail; | |
811 | } | |
812 | ||
813 | /* We will manually add the backing_hd field to the bs later */ | |
814 | states->new_bs = bdrv_new(""); | |
815 | ret = bdrv_open(states->new_bs, snapshot_file, | |
816 | flags | BDRV_O_NO_BACKING, drv); | |
817 | if (ret != 0) { | |
818 | error_set(errp, QERR_OPEN_FILE_FAILED, snapshot_file); | |
819 | goto delete_and_fail; | |
820 | } | |
821 | } | |
822 | ||
823 | ||
824 | /* Now we are going to do the actual pivot. Everything up to this point | |
825 | * is reversible, but we are committed at this point */ | |
826 | QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { | |
827 | /* This removes our old bs from the bdrv_states, and adds the new bs */ | |
828 | bdrv_append(states->new_bs, states->old_bs); | |
829 | } | |
830 | ||
831 | /* success */ | |
832 | goto exit; | |
833 | ||
834 | delete_and_fail: | |
835 | /* | |
836 | * failure, and it is all-or-none; abandon each new bs, and keep using | |
837 | * the original bs for all images | |
838 | */ | |
839 | QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { | |
840 | if (states->new_bs) { | |
841 | bdrv_delete(states->new_bs); | |
842 | } | |
843 | } | |
844 | exit: | |
622d2419 | 845 | QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) { |
8802d1fd JC |
846 | g_free(states); |
847 | } | |
848 | return; | |
849 | } | |
850 | ||
851 | ||
92d48558 | 852 | static void eject_device(BlockDriverState *bs, int force, Error **errp) |
666daa68 | 853 | { |
2d3735d3 SH |
854 | if (bdrv_in_use(bs)) { |
855 | error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); | |
856 | return; | |
857 | } | |
2c6942fa | 858 | if (!bdrv_dev_has_removable_media(bs)) { |
92d48558 LC |
859 | error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
860 | return; | |
ea8f942f | 861 | } |
92d48558 | 862 | |
025ccaa7 PB |
863 | if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { |
864 | bdrv_dev_eject_request(bs, force); | |
865 | if (!force) { | |
92d48558 LC |
866 | error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
867 | return; | |
025ccaa7 | 868 | } |
666daa68 | 869 | } |
92d48558 | 870 | |
3b5276b5 | 871 | bdrv_close(bs); |
666daa68 MA |
872 | } |
873 | ||
c245b6a3 | 874 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
666daa68 MA |
875 | { |
876 | BlockDriverState *bs; | |
666daa68 | 877 | |
c245b6a3 | 878 | bs = bdrv_find(device); |
666daa68 | 879 | if (!bs) { |
c245b6a3 LC |
880 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
881 | return; | |
92d48558 LC |
882 | } |
883 | ||
c245b6a3 | 884 | eject_device(bs, force, errp); |
666daa68 MA |
885 | } |
886 | ||
a4dea8a9 | 887 | void qmp_block_passwd(const char *device, const char *password, Error **errp) |
666daa68 MA |
888 | { |
889 | BlockDriverState *bs; | |
890 | int err; | |
891 | ||
a4dea8a9 | 892 | bs = bdrv_find(device); |
666daa68 | 893 | if (!bs) { |
a4dea8a9 LC |
894 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
895 | return; | |
666daa68 MA |
896 | } |
897 | ||
a4dea8a9 | 898 | err = bdrv_set_key(bs, password); |
666daa68 | 899 | if (err == -EINVAL) { |
a4dea8a9 LC |
900 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
901 | return; | |
666daa68 | 902 | } else if (err < 0) { |
a4dea8a9 LC |
903 | error_set(errp, QERR_INVALID_PASSWORD); |
904 | return; | |
666daa68 | 905 | } |
666daa68 MA |
906 | } |
907 | ||
333a96ec LC |
908 | static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
909 | int bdrv_flags, BlockDriver *drv, | |
910 | const char *password, Error **errp) | |
911 | { | |
912 | if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { | |
913 | error_set(errp, QERR_OPEN_FILE_FAILED, filename); | |
914 | return; | |
915 | } | |
916 | ||
917 | if (bdrv_key_required(bs)) { | |
918 | if (password) { | |
919 | if (bdrv_set_key(bs, password) < 0) { | |
920 | error_set(errp, QERR_INVALID_PASSWORD); | |
921 | } | |
922 | } else { | |
923 | error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), | |
924 | bdrv_get_encrypted_filename(bs)); | |
925 | } | |
926 | } else if (password) { | |
927 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
928 | } | |
929 | } | |
930 | ||
931 | void qmp_change_blockdev(const char *device, const char *filename, | |
932 | bool has_format, const char *format, Error **errp) | |
666daa68 MA |
933 | { |
934 | BlockDriverState *bs; | |
935 | BlockDriver *drv = NULL; | |
936 | int bdrv_flags; | |
92d48558 | 937 | Error *err = NULL; |
666daa68 MA |
938 | |
939 | bs = bdrv_find(device); | |
940 | if (!bs) { | |
333a96ec LC |
941 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
942 | return; | |
666daa68 | 943 | } |
333a96ec LC |
944 | |
945 | if (format) { | |
946 | drv = bdrv_find_whitelisted_format(format); | |
666daa68 | 947 | if (!drv) { |
333a96ec LC |
948 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
949 | return; | |
666daa68 MA |
950 | } |
951 | } | |
333a96ec | 952 | |
92d48558 LC |
953 | eject_device(bs, 0, &err); |
954 | if (error_is_set(&err)) { | |
333a96ec LC |
955 | error_propagate(errp, err); |
956 | return; | |
666daa68 | 957 | } |
333a96ec | 958 | |
528f7663 | 959 | bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; |
199630b6 | 960 | bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; |
333a96ec LC |
961 | |
962 | qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); | |
666daa68 | 963 | } |
9063f814 | 964 | |
727f005e | 965 | /* throttling disk I/O limits */ |
80047da5 LC |
966 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
967 | int64_t bps_wr, int64_t iops, int64_t iops_rd, | |
968 | int64_t iops_wr, Error **errp) | |
727f005e ZYW |
969 | { |
970 | BlockIOLimit io_limits; | |
727f005e ZYW |
971 | BlockDriverState *bs; |
972 | ||
80047da5 | 973 | bs = bdrv_find(device); |
727f005e | 974 | if (!bs) { |
80047da5 LC |
975 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
976 | return; | |
727f005e ZYW |
977 | } |
978 | ||
80047da5 LC |
979 | io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; |
980 | io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; | |
981 | io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; | |
982 | io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; | |
983 | io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; | |
984 | io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; | |
727f005e ZYW |
985 | |
986 | if (!do_check_io_limits(&io_limits)) { | |
80047da5 LC |
987 | error_set(errp, QERR_INVALID_PARAMETER_COMBINATION); |
988 | return; | |
727f005e ZYW |
989 | } |
990 | ||
991 | bs->io_limits = io_limits; | |
992 | bs->slice_time = BLOCK_IO_SLICE_TIME; | |
993 | ||
994 | if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) { | |
995 | bdrv_io_limits_enable(bs); | |
996 | } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { | |
997 | bdrv_io_limits_disable(bs); | |
998 | } else { | |
999 | if (bs->block_timer) { | |
1000 | qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); | |
1001 | } | |
1002 | } | |
727f005e ZYW |
1003 | } |
1004 | ||
9063f814 RH |
1005 | int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
1006 | { | |
1007 | const char *id = qdict_get_str(qdict, "id"); | |
1008 | BlockDriverState *bs; | |
9063f814 RH |
1009 | |
1010 | bs = bdrv_find(id); | |
1011 | if (!bs) { | |
1012 | qerror_report(QERR_DEVICE_NOT_FOUND, id); | |
1013 | return -1; | |
1014 | } | |
8591675f MT |
1015 | if (bdrv_in_use(bs)) { |
1016 | qerror_report(QERR_DEVICE_IN_USE, id); | |
1017 | return -1; | |
1018 | } | |
9063f814 RH |
1019 | |
1020 | /* quiesce block driver; prevent further io */ | |
922453bc | 1021 | bdrv_drain_all(); |
9063f814 RH |
1022 | bdrv_flush(bs); |
1023 | bdrv_close(bs); | |
1024 | ||
fa879d62 | 1025 | /* if we have a device attached to this BlockDriverState |
d22b2f41 RH |
1026 | * then we need to make the drive anonymous until the device |
1027 | * can be removed. If this is a drive with no device backing | |
1028 | * then we can just get rid of the block driver state right here. | |
1029 | */ | |
fa879d62 | 1030 | if (bdrv_get_attached_dev(bs)) { |
d22b2f41 RH |
1031 | bdrv_make_anon(bs); |
1032 | } else { | |
1033 | drive_uninit(drive_get_by_blockdev(bs)); | |
9063f814 RH |
1034 | } |
1035 | ||
9063f814 RH |
1036 | return 0; |
1037 | } | |
6d4a2b3a | 1038 | |
5e7caacb | 1039 | void qmp_block_resize(const char *device, int64_t size, Error **errp) |
6d4a2b3a | 1040 | { |
6d4a2b3a CH |
1041 | BlockDriverState *bs; |
1042 | ||
1043 | bs = bdrv_find(device); | |
1044 | if (!bs) { | |
5e7caacb LC |
1045 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1046 | return; | |
6d4a2b3a CH |
1047 | } |
1048 | ||
1049 | if (size < 0) { | |
939a1cc3 | 1050 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
5e7caacb | 1051 | return; |
6d4a2b3a CH |
1052 | } |
1053 | ||
939a1cc3 SH |
1054 | switch (bdrv_truncate(bs, size)) { |
1055 | case 0: | |
1056 | break; | |
1057 | case -ENOMEDIUM: | |
1058 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1059 | break; | |
1060 | case -ENOTSUP: | |
1061 | error_set(errp, QERR_UNSUPPORTED); | |
1062 | break; | |
1063 | case -EACCES: | |
1064 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1065 | break; | |
1066 | case -EBUSY: | |
1067 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1068 | break; | |
1069 | default: | |
5e7caacb | 1070 | error_set(errp, QERR_UNDEFINED_ERROR); |
939a1cc3 | 1071 | break; |
6d4a2b3a | 1072 | } |
6d4a2b3a | 1073 | } |
12bd451f SH |
1074 | |
1075 | static QObject *qobject_from_block_job(BlockJob *job) | |
1076 | { | |
1077 | return qobject_from_jsonf("{ 'type': %s," | |
1078 | "'device': %s," | |
1079 | "'len': %" PRId64 "," | |
1080 | "'offset': %" PRId64 "," | |
1081 | "'speed': %" PRId64 " }", | |
1082 | job->job_type->job_type, | |
1083 | bdrv_get_device_name(job->bs), | |
1084 | job->len, | |
1085 | job->offset, | |
1086 | job->speed); | |
1087 | } | |
1088 | ||
1089 | static void block_stream_cb(void *opaque, int ret) | |
1090 | { | |
1091 | BlockDriverState *bs = opaque; | |
1092 | QObject *obj; | |
1093 | ||
1094 | trace_block_stream_cb(bs, bs->job, ret); | |
1095 | ||
1096 | assert(bs->job); | |
1097 | obj = qobject_from_block_job(bs->job); | |
1098 | if (ret < 0) { | |
1099 | QDict *dict = qobject_to_qdict(obj); | |
1100 | qdict_put(dict, "error", qstring_from_str(strerror(-ret))); | |
1101 | } | |
1102 | ||
370521a1 SH |
1103 | if (block_job_is_cancelled(bs->job)) { |
1104 | monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); | |
1105 | } else { | |
1106 | monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); | |
1107 | } | |
12bd451f | 1108 | qobject_decref(obj); |
aa398a5c SH |
1109 | |
1110 | drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); | |
12bd451f SH |
1111 | } |
1112 | ||
1113 | void qmp_block_stream(const char *device, bool has_base, | |
1114 | const char *base, Error **errp) | |
1115 | { | |
1116 | BlockDriverState *bs; | |
c8c3080f | 1117 | BlockDriverState *base_bs = NULL; |
12bd451f SH |
1118 | int ret; |
1119 | ||
1120 | bs = bdrv_find(device); | |
1121 | if (!bs) { | |
1122 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1123 | return; | |
1124 | } | |
1125 | ||
12bd451f | 1126 | if (base) { |
c8c3080f MT |
1127 | base_bs = bdrv_find_backing_image(bs, base); |
1128 | if (base_bs == NULL) { | |
1129 | error_set(errp, QERR_BASE_NOT_FOUND, base); | |
1130 | return; | |
1131 | } | |
12bd451f SH |
1132 | } |
1133 | ||
c8c3080f | 1134 | ret = stream_start(bs, base_bs, base, block_stream_cb, bs); |
12bd451f SH |
1135 | if (ret < 0) { |
1136 | switch (ret) { | |
1137 | case -EBUSY: | |
1138 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1139 | return; | |
1140 | default: | |
1141 | error_set(errp, QERR_NOT_SUPPORTED); | |
1142 | return; | |
1143 | } | |
1144 | } | |
1145 | ||
aa398a5c SH |
1146 | /* Grab a reference so hotplug does not delete the BlockDriverState from |
1147 | * underneath us. | |
1148 | */ | |
1149 | drive_get_ref(drive_get_by_blockdev(bs)); | |
1150 | ||
12bd451f SH |
1151 | trace_qmp_block_stream(bs, bs->job); |
1152 | } | |
2d47c6e9 SH |
1153 | |
1154 | static BlockJob *find_block_job(const char *device) | |
1155 | { | |
1156 | BlockDriverState *bs; | |
1157 | ||
1158 | bs = bdrv_find(device); | |
1159 | if (!bs || !bs->job) { | |
1160 | return NULL; | |
1161 | } | |
1162 | return bs->job; | |
1163 | } | |
1164 | ||
1165 | void qmp_block_job_set_speed(const char *device, int64_t value, Error **errp) | |
1166 | { | |
1167 | BlockJob *job = find_block_job(device); | |
1168 | ||
1169 | if (!job) { | |
1170 | error_set(errp, QERR_DEVICE_NOT_ACTIVE, device); | |
1171 | return; | |
1172 | } | |
1173 | ||
1174 | if (block_job_set_speed(job, value) < 0) { | |
1175 | error_set(errp, QERR_NOT_SUPPORTED); | |
1176 | } | |
1177 | } | |
370521a1 SH |
1178 | |
1179 | void qmp_block_job_cancel(const char *device, Error **errp) | |
1180 | { | |
1181 | BlockJob *job = find_block_job(device); | |
1182 | ||
1183 | if (!job) { | |
1184 | error_set(errp, QERR_DEVICE_NOT_ACTIVE, device); | |
1185 | return; | |
1186 | } | |
1187 | ||
1188 | trace_qmp_block_job_cancel(job); | |
1189 | block_job_cancel(job); | |
1190 | } | |
fb5458cd SH |
1191 | |
1192 | static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) | |
1193 | { | |
1194 | BlockJobInfoList **prev = opaque; | |
1195 | BlockJob *job = bs->job; | |
1196 | ||
1197 | if (job) { | |
1198 | BlockJobInfoList *elem; | |
1199 | BlockJobInfo *info = g_new(BlockJobInfo, 1); | |
1200 | *info = (BlockJobInfo){ | |
1201 | .type = g_strdup(job->job_type->job_type), | |
1202 | .device = g_strdup(bdrv_get_device_name(bs)), | |
1203 | .len = job->len, | |
1204 | .offset = job->offset, | |
1205 | .speed = job->speed, | |
1206 | }; | |
1207 | ||
1208 | elem = g_new0(BlockJobInfoList, 1); | |
1209 | elem->value = info; | |
1210 | ||
1211 | (*prev)->next = elem; | |
1212 | *prev = elem; | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
1217 | { | |
1218 | /* Dummy is a fake list element for holding the head pointer */ | |
1219 | BlockJobInfoList dummy = {}; | |
1220 | BlockJobInfoList *prev = &dummy; | |
1221 | bdrv_iterate(do_qmp_query_block_jobs_one, &prev); | |
1222 | return dummy.next; | |
1223 | } |