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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. | |
3618a094 MA |
8 | * |
9 | * This file incorporates work covered by the following copyright and | |
10 | * permission notice: | |
11 | * | |
12 | * Copyright (c) 2003-2008 Fabrice Bellard | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
15 | * of this software and associated documentation files (the "Software"), to deal | |
16 | * in the Software without restriction, including without limitation the rights | |
17 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
18 | * copies of the Software, and to permit persons to whom the Software is | |
19 | * furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice shall be included in | |
22 | * all copies or substantial portions of the Software. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
27 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
28 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
29 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
30 | * THE SOFTWARE. | |
666daa68 MA |
31 | */ |
32 | ||
26f54e9a | 33 | #include "sysemu/block-backend.h" |
9c17d615 | 34 | #include "sysemu/blockdev.h" |
0d09e41a | 35 | #include "hw/block/block.h" |
737e150e | 36 | #include "block/blockjob.h" |
83c9089e | 37 | #include "monitor/monitor.h" |
1de7afc9 PB |
38 | #include "qemu/option.h" |
39 | #include "qemu/config-file.h" | |
7b1b5d19 | 40 | #include "qapi/qmp/types.h" |
d26c9a15 KW |
41 | #include "qapi-visit.h" |
42 | #include "qapi/qmp-output-visitor.h" | |
9e7dac7c | 43 | #include "qapi/util.h" |
9c17d615 | 44 | #include "sysemu/sysemu.h" |
737e150e | 45 | #include "block/block_int.h" |
a4dea8a9 | 46 | #include "qmp-commands.h" |
12bd451f | 47 | #include "trace.h" |
9c17d615 | 48 | #include "sysemu/arch_init.h" |
666daa68 | 49 | |
1960966d MA |
50 | static const char *const if_name[IF_COUNT] = { |
51 | [IF_NONE] = "none", | |
52 | [IF_IDE] = "ide", | |
53 | [IF_SCSI] = "scsi", | |
54 | [IF_FLOPPY] = "floppy", | |
55 | [IF_PFLASH] = "pflash", | |
56 | [IF_MTD] = "mtd", | |
57 | [IF_SD] = "sd", | |
58 | [IF_VIRTIO] = "virtio", | |
59 | [IF_XEN] = "xen", | |
60 | }; | |
61 | ||
21dff8cf | 62 | static int if_max_devs[IF_COUNT] = { |
27d6bf40 MA |
63 | /* |
64 | * Do not change these numbers! They govern how drive option | |
65 | * index maps to unit and bus. That mapping is ABI. | |
66 | * | |
67 | * All controllers used to imlement if=T drives need to support | |
68 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
69 | * Otherwise, some index values map to "impossible" bus, unit | |
70 | * values. | |
71 | * | |
72 | * For instance, if you change [IF_SCSI] to 255, -drive | |
73 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
74 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
75 | * the drive can't be set up. Regression. | |
76 | */ | |
77 | [IF_IDE] = 2, | |
78 | [IF_SCSI] = 7, | |
1960966d MA |
79 | }; |
80 | ||
21dff8cf JS |
81 | /** |
82 | * Boards may call this to offer board-by-board overrides | |
83 | * of the default, global values. | |
84 | */ | |
85 | void override_max_devs(BlockInterfaceType type, int max_devs) | |
86 | { | |
18e46a03 | 87 | BlockBackend *blk; |
21dff8cf JS |
88 | DriveInfo *dinfo; |
89 | ||
90 | if (max_devs <= 0) { | |
91 | return; | |
92 | } | |
93 | ||
18e46a03 MA |
94 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
95 | dinfo = blk_legacy_dinfo(blk); | |
21dff8cf JS |
96 | if (dinfo->type == type) { |
97 | fprintf(stderr, "Cannot override units-per-bus property of" | |
98 | " the %s interface, because a drive of that type has" | |
99 | " already been added.\n", if_name[type]); | |
100 | g_assert_not_reached(); | |
101 | } | |
102 | } | |
103 | ||
104 | if_max_devs[type] = max_devs; | |
105 | } | |
106 | ||
14bafc54 MA |
107 | /* |
108 | * We automatically delete the drive when a device using it gets | |
109 | * unplugged. Questionable feature, but we can't just drop it. | |
110 | * Device models call blockdev_mark_auto_del() to schedule the | |
111 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
112 | * when deletion is actually safe. | |
113 | */ | |
114 | void blockdev_mark_auto_del(BlockDriverState *bs) | |
115 | { | |
18e46a03 MA |
116 | BlockBackend *blk = bs->blk; |
117 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
14bafc54 | 118 | |
2d246f01 KW |
119 | if (dinfo && !dinfo->enable_auto_del) { |
120 | return; | |
121 | } | |
122 | ||
12bde0ee PB |
123 | if (bs->job) { |
124 | block_job_cancel(bs->job); | |
125 | } | |
0fc0f1fa RH |
126 | if (dinfo) { |
127 | dinfo->auto_del = 1; | |
128 | } | |
14bafc54 MA |
129 | } |
130 | ||
131 | void blockdev_auto_del(BlockDriverState *bs) | |
132 | { | |
18e46a03 MA |
133 | BlockBackend *blk = bs->blk; |
134 | DriveInfo *dinfo = blk_legacy_dinfo(blk); | |
14bafc54 | 135 | |
0fc0f1fa | 136 | if (dinfo && dinfo->auto_del) { |
ae60e8e3 | 137 | drive_del(dinfo); |
14bafc54 MA |
138 | } |
139 | } | |
140 | ||
d8f94e1b JS |
141 | /** |
142 | * Returns the current mapping of how many units per bus | |
143 | * a particular interface can support. | |
144 | * | |
145 | * A positive integer indicates n units per bus. | |
146 | * 0 implies the mapping has not been established. | |
147 | * -1 indicates an invalid BlockInterfaceType was given. | |
148 | */ | |
149 | int drive_get_max_devs(BlockInterfaceType type) | |
150 | { | |
151 | if (type >= IF_IDE && type < IF_COUNT) { | |
152 | return if_max_devs[type]; | |
153 | } | |
154 | ||
155 | return -1; | |
156 | } | |
157 | ||
505a7fb1 MA |
158 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
159 | { | |
160 | int max_devs = if_max_devs[type]; | |
161 | return max_devs ? index / max_devs : 0; | |
162 | } | |
163 | ||
164 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
165 | { | |
166 | int max_devs = if_max_devs[type]; | |
167 | return max_devs ? index % max_devs : index; | |
168 | } | |
169 | ||
2292ddae MA |
170 | QemuOpts *drive_def(const char *optstr) |
171 | { | |
172 | return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); | |
173 | } | |
174 | ||
175 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
5645b0f4 | 176 | const char *optstr) |
666daa68 | 177 | { |
666daa68 | 178 | QemuOpts *opts; |
2292ddae | 179 | char buf[32]; |
666daa68 | 180 | |
2292ddae | 181 | opts = drive_def(optstr); |
666daa68 MA |
182 | if (!opts) { |
183 | return NULL; | |
184 | } | |
2292ddae MA |
185 | if (type != IF_DEFAULT) { |
186 | qemu_opt_set(opts, "if", if_name[type]); | |
187 | } | |
188 | if (index >= 0) { | |
189 | snprintf(buf, sizeof(buf), "%d", index); | |
190 | qemu_opt_set(opts, "index", buf); | |
191 | } | |
666daa68 MA |
192 | if (file) |
193 | qemu_opt_set(opts, "file", file); | |
194 | return opts; | |
195 | } | |
196 | ||
197 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
198 | { | |
18e46a03 | 199 | BlockBackend *blk; |
666daa68 MA |
200 | DriveInfo *dinfo; |
201 | ||
18e46a03 MA |
202 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
203 | dinfo = blk_legacy_dinfo(blk); | |
204 | if (dinfo && dinfo->type == type | |
205 | && dinfo->bus == bus && dinfo->unit == unit) { | |
666daa68 | 206 | return dinfo; |
18e46a03 | 207 | } |
666daa68 MA |
208 | } |
209 | ||
210 | return NULL; | |
211 | } | |
212 | ||
a66c9dc7 JS |
213 | bool drive_check_orphaned(void) |
214 | { | |
18e46a03 | 215 | BlockBackend *blk; |
a66c9dc7 JS |
216 | DriveInfo *dinfo; |
217 | bool rs = false; | |
218 | ||
18e46a03 MA |
219 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
220 | dinfo = blk_legacy_dinfo(blk); | |
a66c9dc7 JS |
221 | /* If dinfo->bdrv->dev is NULL, it has no device attached. */ |
222 | /* Unless this is a default drive, this may be an oversight. */ | |
223 | if (!dinfo->bdrv->dev && !dinfo->is_default && | |
224 | dinfo->type != IF_NONE) { | |
225 | fprintf(stderr, "Warning: Orphaned drive without device: " | |
226 | "id=%s,file=%s,if=%s,bus=%d,unit=%d\n", | |
227 | dinfo->id, dinfo->bdrv->filename, if_name[dinfo->type], | |
228 | dinfo->bus, dinfo->unit); | |
229 | rs = true; | |
230 | } | |
231 | } | |
232 | ||
233 | return rs; | |
234 | } | |
235 | ||
f1bd51ac MA |
236 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
237 | { | |
238 | return drive_get(type, | |
239 | drive_index_to_bus_id(type, index), | |
240 | drive_index_to_unit_id(type, index)); | |
241 | } | |
242 | ||
666daa68 MA |
243 | int drive_get_max_bus(BlockInterfaceType type) |
244 | { | |
245 | int max_bus; | |
18e46a03 | 246 | BlockBackend *blk; |
666daa68 MA |
247 | DriveInfo *dinfo; |
248 | ||
249 | max_bus = -1; | |
18e46a03 MA |
250 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
251 | dinfo = blk_legacy_dinfo(blk); | |
252 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { | |
666daa68 | 253 | max_bus = dinfo->bus; |
18e46a03 | 254 | } |
666daa68 MA |
255 | } |
256 | return max_bus; | |
257 | } | |
258 | ||
13839974 MA |
259 | /* Get a block device. This should only be used for single-drive devices |
260 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
261 | appropriate bus. */ | |
262 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
263 | { | |
264 | static int next_block_unit[IF_COUNT]; | |
265 | ||
266 | return drive_get(type, 0, next_block_unit[type]++); | |
267 | } | |
268 | ||
e4700e59 | 269 | DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) |
666daa68 | 270 | { |
18e46a03 | 271 | return bs->blk ? blk_legacy_dinfo(bs->blk) : NULL; |
666daa68 MA |
272 | } |
273 | ||
666daa68 MA |
274 | static void bdrv_format_print(void *opaque, const char *name) |
275 | { | |
807105a7 | 276 | error_printf(" %s", name); |
666daa68 MA |
277 | } |
278 | ||
ae60e8e3 | 279 | void drive_del(DriveInfo *dinfo) |
666daa68 | 280 | { |
9ba10c95 | 281 | blk_unref(dinfo->bdrv->blk); |
3ae59580 MA |
282 | } |
283 | ||
aa398a5c SH |
284 | typedef struct { |
285 | QEMUBH *bh; | |
fa510ebf FZ |
286 | BlockDriverState *bs; |
287 | } BDRVPutRefBH; | |
aa398a5c | 288 | |
fa510ebf | 289 | static void bdrv_put_ref_bh(void *opaque) |
aa398a5c | 290 | { |
fa510ebf | 291 | BDRVPutRefBH *s = opaque; |
aa398a5c | 292 | |
fa510ebf | 293 | bdrv_unref(s->bs); |
aa398a5c SH |
294 | qemu_bh_delete(s->bh); |
295 | g_free(s); | |
296 | } | |
297 | ||
298 | /* | |
fa510ebf | 299 | * Release a BDS reference in a BH |
aa398a5c | 300 | * |
fa510ebf FZ |
301 | * It is not safe to use bdrv_unref() from a callback function when the callers |
302 | * still need the BlockDriverState. In such cases we schedule a BH to release | |
303 | * the reference. | |
aa398a5c | 304 | */ |
fa510ebf | 305 | static void bdrv_put_ref_bh_schedule(BlockDriverState *bs) |
aa398a5c | 306 | { |
fa510ebf | 307 | BDRVPutRefBH *s; |
aa398a5c | 308 | |
fa510ebf FZ |
309 | s = g_new(BDRVPutRefBH, 1); |
310 | s->bh = qemu_bh_new(bdrv_put_ref_bh, s); | |
311 | s->bs = bs; | |
aa398a5c SH |
312 | qemu_bh_schedule(s->bh); |
313 | } | |
314 | ||
b681072d | 315 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) |
666daa68 MA |
316 | { |
317 | if (!strcmp(buf, "ignore")) { | |
92aa5c6d | 318 | return BLOCKDEV_ON_ERROR_IGNORE; |
666daa68 | 319 | } else if (!is_read && !strcmp(buf, "enospc")) { |
92aa5c6d | 320 | return BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 321 | } else if (!strcmp(buf, "stop")) { |
92aa5c6d | 322 | return BLOCKDEV_ON_ERROR_STOP; |
666daa68 | 323 | } else if (!strcmp(buf, "report")) { |
92aa5c6d | 324 | return BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 325 | } else { |
b681072d KW |
326 | error_setg(errp, "'%s' invalid %s error action", |
327 | buf, is_read ? "read" : "write"); | |
666daa68 MA |
328 | return -1; |
329 | } | |
330 | } | |
331 | ||
cc0681c4 | 332 | static bool check_throttle_config(ThrottleConfig *cfg, Error **errp) |
0563e191 | 333 | { |
cc0681c4 BC |
334 | if (throttle_conflicting(cfg)) { |
335 | error_setg(errp, "bps/iops/max total values and read/write values" | |
336 | " cannot be used at the same time"); | |
0563e191 ZYW |
337 | return false; |
338 | } | |
339 | ||
cc0681c4 BC |
340 | if (!throttle_is_valid(cfg)) { |
341 | error_setg(errp, "bps/iops/maxs values must be 0 or greater"); | |
7d81c141 SH |
342 | return false; |
343 | } | |
344 | ||
0563e191 ZYW |
345 | return true; |
346 | } | |
347 | ||
33cb7dc8 KW |
348 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; |
349 | ||
f298d071 | 350 | /* Takes the ownership of bs_opts */ |
18e46a03 MA |
351 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, |
352 | Error **errp) | |
666daa68 MA |
353 | { |
354 | const char *buf; | |
666daa68 MA |
355 | int ro = 0; |
356 | int bdrv_flags = 0; | |
357 | int on_read_error, on_write_error; | |
26f54e9a | 358 | BlockBackend *blk; |
a0f1eab1 | 359 | BlockDriverState *bs; |
666daa68 | 360 | DriveInfo *dinfo; |
cc0681c4 | 361 | ThrottleConfig cfg; |
666daa68 | 362 | int snapshot = 0; |
fb0490f6 | 363 | bool copy_on_read; |
666daa68 | 364 | int ret; |
c546194f | 365 | Error *error = NULL; |
0006383e | 366 | QemuOpts *opts; |
0006383e | 367 | const char *id; |
74fe54f2 | 368 | bool has_driver_specific_opts; |
465bee1d | 369 | BlockdevDetectZeroesOptions detect_zeroes; |
6db5f5d6 | 370 | BlockDriver *drv = NULL; |
666daa68 | 371 | |
f298d071 KW |
372 | /* Check common options by copying from bs_opts to opts, all other options |
373 | * stay in bs_opts for processing by bdrv_open(). */ | |
374 | id = qdict_get_try_str(bs_opts, "id"); | |
0006383e | 375 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error); |
84d18f06 | 376 | if (error) { |
b681072d | 377 | error_propagate(errp, error); |
6376f952 | 378 | goto err_no_opts; |
0006383e KW |
379 | } |
380 | ||
0006383e | 381 | qemu_opts_absorb_qdict(opts, bs_opts, &error); |
84d18f06 | 382 | if (error) { |
b681072d | 383 | error_propagate(errp, error); |
ec9c10d2 | 384 | goto early_err; |
0006383e KW |
385 | } |
386 | ||
387 | if (id) { | |
388 | qdict_del(bs_opts, "id"); | |
389 | } | |
390 | ||
74fe54f2 KW |
391 | has_driver_specific_opts = !!qdict_size(bs_opts); |
392 | ||
666daa68 | 393 | /* extract parameters */ |
666daa68 | 394 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
0f227a94 | 395 | ro = qemu_opt_get_bool(opts, "read-only", 0); |
fb0490f6 | 396 | copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
666daa68 | 397 | |
a9384aff PB |
398 | if ((buf = qemu_opt_get(opts, "discard")) != NULL) { |
399 | if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { | |
b681072d | 400 | error_setg(errp, "invalid discard option"); |
ec9c10d2 | 401 | goto early_err; |
a9384aff PB |
402 | } |
403 | } | |
404 | ||
29c4e2b5 KW |
405 | if (qemu_opt_get_bool(opts, "cache.writeback", true)) { |
406 | bdrv_flags |= BDRV_O_CACHE_WB; | |
407 | } | |
408 | if (qemu_opt_get_bool(opts, "cache.direct", false)) { | |
409 | bdrv_flags |= BDRV_O_NOCACHE; | |
410 | } | |
1df6fa4b | 411 | if (qemu_opt_get_bool(opts, "cache.no-flush", false)) { |
29c4e2b5 | 412 | bdrv_flags |= BDRV_O_NO_FLUSH; |
666daa68 MA |
413 | } |
414 | ||
415 | #ifdef CONFIG_LINUX_AIO | |
416 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
417 | if (!strcmp(buf, "native")) { | |
418 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
419 | } else if (!strcmp(buf, "threads")) { | |
420 | /* this is the default */ | |
421 | } else { | |
b681072d | 422 | error_setg(errp, "invalid aio option"); |
ec9c10d2 | 423 | goto early_err; |
666daa68 MA |
424 | } |
425 | } | |
426 | #endif | |
427 | ||
428 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
c8057f95 PM |
429 | if (is_help_option(buf)) { |
430 | error_printf("Supported formats:"); | |
431 | bdrv_iterate_format(bdrv_format_print, NULL); | |
432 | error_printf("\n"); | |
ec9c10d2 | 433 | goto early_err; |
666daa68 | 434 | } |
74fe54f2 | 435 | |
8f94a6e4 | 436 | drv = bdrv_find_format(buf); |
6db5f5d6 | 437 | if (!drv) { |
b681072d | 438 | error_setg(errp, "'%s' invalid format", buf); |
ec9c10d2 | 439 | goto early_err; |
6db5f5d6 | 440 | } |
666daa68 MA |
441 | } |
442 | ||
0563e191 | 443 | /* disk I/O throttling */ |
cc0681c4 BC |
444 | memset(&cfg, 0, sizeof(cfg)); |
445 | cfg.buckets[THROTTLE_BPS_TOTAL].avg = | |
57975222 | 446 | qemu_opt_get_number(opts, "throttling.bps-total", 0); |
cc0681c4 | 447 | cfg.buckets[THROTTLE_BPS_READ].avg = |
57975222 | 448 | qemu_opt_get_number(opts, "throttling.bps-read", 0); |
cc0681c4 | 449 | cfg.buckets[THROTTLE_BPS_WRITE].avg = |
57975222 | 450 | qemu_opt_get_number(opts, "throttling.bps-write", 0); |
cc0681c4 | 451 | cfg.buckets[THROTTLE_OPS_TOTAL].avg = |
57975222 | 452 | qemu_opt_get_number(opts, "throttling.iops-total", 0); |
cc0681c4 | 453 | cfg.buckets[THROTTLE_OPS_READ].avg = |
57975222 | 454 | qemu_opt_get_number(opts, "throttling.iops-read", 0); |
cc0681c4 | 455 | cfg.buckets[THROTTLE_OPS_WRITE].avg = |
57975222 | 456 | qemu_opt_get_number(opts, "throttling.iops-write", 0); |
0563e191 | 457 | |
3e9fab69 BC |
458 | cfg.buckets[THROTTLE_BPS_TOTAL].max = |
459 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
460 | cfg.buckets[THROTTLE_BPS_READ].max = | |
461 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
462 | cfg.buckets[THROTTLE_BPS_WRITE].max = | |
463 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
464 | cfg.buckets[THROTTLE_OPS_TOTAL].max = | |
465 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
466 | cfg.buckets[THROTTLE_OPS_READ].max = | |
467 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
468 | cfg.buckets[THROTTLE_OPS_WRITE].max = | |
469 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
cc0681c4 | 470 | |
2024c1df | 471 | cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0); |
cc0681c4 BC |
472 | |
473 | if (!check_throttle_config(&cfg, &error)) { | |
b681072d | 474 | error_propagate(errp, error); |
ec9c10d2 | 475 | goto early_err; |
0563e191 ZYW |
476 | } |
477 | ||
92aa5c6d | 478 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 479 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
b681072d | 480 | on_write_error = parse_block_error_action(buf, 0, &error); |
84d18f06 | 481 | if (error) { |
b681072d | 482 | error_propagate(errp, error); |
ec9c10d2 | 483 | goto early_err; |
666daa68 MA |
484 | } |
485 | } | |
486 | ||
92aa5c6d | 487 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 488 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
b681072d | 489 | on_read_error = parse_block_error_action(buf, 1, &error); |
84d18f06 | 490 | if (error) { |
b681072d | 491 | error_propagate(errp, error); |
ec9c10d2 | 492 | goto early_err; |
666daa68 MA |
493 | } |
494 | } | |
495 | ||
465bee1d | 496 | detect_zeroes = |
9e7dac7c PL |
497 | qapi_enum_parse(BlockdevDetectZeroesOptions_lookup, |
498 | qemu_opt_get(opts, "detect-zeroes"), | |
499 | BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX, | |
500 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, | |
501 | &error); | |
465bee1d PL |
502 | if (error) { |
503 | error_propagate(errp, error); | |
504 | goto early_err; | |
505 | } | |
506 | ||
507 | if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && | |
508 | !(bdrv_flags & BDRV_O_UNMAP)) { | |
509 | error_setg(errp, "setting detect-zeroes to unmap is not allowed " | |
510 | "without setting discard operation to unmap"); | |
511 | goto early_err; | |
512 | } | |
513 | ||
326642bc | 514 | /* init */ |
7e7d56d9 | 515 | blk = blk_new_with_bs(qemu_opts_id(opts), errp); |
26f54e9a MA |
516 | if (!blk) { |
517 | goto early_err; | |
518 | } | |
7e7d56d9 | 519 | bs = blk_bs(blk); |
a0f1eab1 MA |
520 | bs->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; |
521 | bs->read_only = ro; | |
522 | bs->detect_zeroes = detect_zeroes; | |
666daa68 | 523 | |
a0f1eab1 | 524 | bdrv_set_on_error(bs, on_read_error, on_write_error); |
abd7f68d | 525 | |
0563e191 | 526 | /* disk I/O throttling */ |
cc0681c4 | 527 | if (throttle_enabled(&cfg)) { |
a0f1eab1 MA |
528 | bdrv_io_limits_enable(bs); |
529 | bdrv_set_io_limits(bs, &cfg); | |
cc0681c4 | 530 | } |
0563e191 | 531 | |
a0f1eab1 MA |
532 | dinfo = g_malloc0(sizeof(*dinfo)); |
533 | dinfo->id = g_strdup(qemu_opts_id(opts)); | |
534 | dinfo->bdrv = bs; | |
18e46a03 | 535 | blk_set_legacy_dinfo(blk, dinfo); |
a0f1eab1 | 536 | |
dd5b0d71 | 537 | if (!file || !*file) { |
74fe54f2 | 538 | if (has_driver_specific_opts) { |
c2ad1b0c KW |
539 | file = NULL; |
540 | } else { | |
ec9c10d2 SH |
541 | QDECREF(bs_opts); |
542 | qemu_opts_del(opts); | |
18e46a03 | 543 | return blk; |
c2ad1b0c | 544 | } |
666daa68 MA |
545 | } |
546 | if (snapshot) { | |
547 | /* always use cache=unsafe with snapshot */ | |
548 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
549 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
550 | } | |
551 | ||
fb0490f6 SH |
552 | if (copy_on_read) { |
553 | bdrv_flags |= BDRV_O_COPY_ON_READ; | |
554 | } | |
555 | ||
ed9d4205 BC |
556 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
557 | bdrv_flags |= BDRV_O_INCOMING; | |
558 | } | |
559 | ||
666daa68 MA |
560 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; |
561 | ||
74fe54f2 | 562 | QINCREF(bs_opts); |
a0f1eab1 MA |
563 | ret = bdrv_open(&bs, file, NULL, bs_opts, bdrv_flags, drv, &error); |
564 | assert(bs == dinfo->bdrv); | |
0006383e | 565 | |
666daa68 | 566 | if (ret < 0) { |
b681072d KW |
567 | error_setg(errp, "could not open disk image %s: %s", |
568 | file ?: dinfo->id, error_get_pretty(error)); | |
569 | error_free(error); | |
a9ae2bff | 570 | goto err; |
666daa68 MA |
571 | } |
572 | ||
a0f1eab1 | 573 | if (bdrv_key_required(bs)) { |
666daa68 | 574 | autostart = 0; |
a0f1eab1 | 575 | } |
0006383e | 576 | |
74fe54f2 | 577 | QDECREF(bs_opts); |
0006383e KW |
578 | qemu_opts_del(opts); |
579 | ||
18e46a03 | 580 | return blk; |
a9ae2bff MA |
581 | |
582 | err: | |
26f54e9a | 583 | blk_unref(blk); |
ec9c10d2 | 584 | early_err: |
ec9c10d2 | 585 | qemu_opts_del(opts); |
6376f952 MA |
586 | err_no_opts: |
587 | QDECREF(bs_opts); | |
a9ae2bff | 588 | return NULL; |
666daa68 MA |
589 | } |
590 | ||
5abbf0ee KW |
591 | static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, |
592 | Error **errp) | |
57975222 KW |
593 | { |
594 | const char *value; | |
595 | ||
596 | value = qemu_opt_get(opts, from); | |
597 | if (value) { | |
5abbf0ee KW |
598 | if (qemu_opt_find(opts, to)) { |
599 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " | |
600 | "same time", to, from); | |
601 | return; | |
602 | } | |
20d6cd47 JL |
603 | } |
604 | ||
605 | /* rename all items in opts */ | |
606 | while ((value = qemu_opt_get(opts, from))) { | |
57975222 KW |
607 | qemu_opt_set(opts, to, value); |
608 | qemu_opt_unset(opts, from); | |
609 | } | |
610 | } | |
611 | ||
33cb7dc8 KW |
612 | QemuOptsList qemu_legacy_drive_opts = { |
613 | .name = "drive", | |
614 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
615 | .desc = { | |
616 | { | |
87a899c5 KW |
617 | .name = "bus", |
618 | .type = QEMU_OPT_NUMBER, | |
619 | .help = "bus number", | |
620 | },{ | |
621 | .name = "unit", | |
622 | .type = QEMU_OPT_NUMBER, | |
623 | .help = "unit number (i.e. lun for scsi)", | |
624 | },{ | |
625 | .name = "index", | |
626 | .type = QEMU_OPT_NUMBER, | |
627 | .help = "index number", | |
628 | },{ | |
33cb7dc8 KW |
629 | .name = "media", |
630 | .type = QEMU_OPT_STRING, | |
631 | .help = "media type (disk, cdrom)", | |
593d464b KW |
632 | },{ |
633 | .name = "if", | |
634 | .type = QEMU_OPT_STRING, | |
635 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
b41a7338 KW |
636 | },{ |
637 | .name = "cyls", | |
638 | .type = QEMU_OPT_NUMBER, | |
639 | .help = "number of cylinders (ide disk geometry)", | |
640 | },{ | |
641 | .name = "heads", | |
642 | .type = QEMU_OPT_NUMBER, | |
643 | .help = "number of heads (ide disk geometry)", | |
644 | },{ | |
645 | .name = "secs", | |
646 | .type = QEMU_OPT_NUMBER, | |
647 | .help = "number of sectors (ide disk geometry)", | |
648 | },{ | |
649 | .name = "trans", | |
650 | .type = QEMU_OPT_STRING, | |
651 | .help = "chs translation (auto, lba, none)", | |
26929298 KW |
652 | },{ |
653 | .name = "boot", | |
654 | .type = QEMU_OPT_BOOL, | |
655 | .help = "(deprecated, ignored)", | |
394c7d4d KW |
656 | },{ |
657 | .name = "addr", | |
658 | .type = QEMU_OPT_STRING, | |
659 | .help = "pci address (virtio only)", | |
bcf83158 KW |
660 | },{ |
661 | .name = "serial", | |
662 | .type = QEMU_OPT_STRING, | |
663 | .help = "disk serial number", | |
d095b465 HR |
664 | },{ |
665 | .name = "file", | |
666 | .type = QEMU_OPT_STRING, | |
667 | .help = "file name", | |
33cb7dc8 | 668 | }, |
0ebd24e0 KW |
669 | |
670 | /* Options that are passed on, but have special semantics with -drive */ | |
671 | { | |
672 | .name = "read-only", | |
673 | .type = QEMU_OPT_BOOL, | |
674 | .help = "open drive file as read-only", | |
ee13ed1c KW |
675 | },{ |
676 | .name = "rerror", | |
677 | .type = QEMU_OPT_STRING, | |
678 | .help = "read error action", | |
679 | },{ | |
680 | .name = "werror", | |
681 | .type = QEMU_OPT_STRING, | |
682 | .help = "write error action", | |
0ebd24e0 KW |
683 | },{ |
684 | .name = "copy-on-read", | |
685 | .type = QEMU_OPT_BOOL, | |
686 | .help = "copy read data from backing file into image file", | |
687 | }, | |
688 | ||
33cb7dc8 KW |
689 | { /* end of list */ } |
690 | }, | |
691 | }; | |
692 | ||
60e19e06 | 693 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type) |
57975222 | 694 | { |
29c4e2b5 | 695 | const char *value; |
18e46a03 | 696 | BlockBackend *blk; |
33cb7dc8 | 697 | DriveInfo *dinfo = NULL; |
f298d071 | 698 | QDict *bs_opts; |
33cb7dc8 KW |
699 | QemuOpts *legacy_opts; |
700 | DriveMediaType media = MEDIA_DISK; | |
593d464b | 701 | BlockInterfaceType type; |
b41a7338 | 702 | int cyls, heads, secs, translation; |
87a899c5 | 703 | int max_devs, bus_id, unit_id, index; |
394c7d4d | 704 | const char *devaddr; |
ee13ed1c | 705 | const char *werror, *rerror; |
a7fdbcf0 FZ |
706 | bool read_only = false; |
707 | bool copy_on_read; | |
bcf83158 | 708 | const char *serial; |
d095b465 | 709 | const char *filename; |
33cb7dc8 | 710 | Error *local_err = NULL; |
247147fb | 711 | int i; |
29c4e2b5 | 712 | |
57975222 | 713 | /* Change legacy command line options into QMP ones */ |
247147fb KW |
714 | static const struct { |
715 | const char *from; | |
716 | const char *to; | |
717 | } opt_renames[] = { | |
718 | { "iops", "throttling.iops-total" }, | |
719 | { "iops_rd", "throttling.iops-read" }, | |
720 | { "iops_wr", "throttling.iops-write" }, | |
57975222 | 721 | |
247147fb KW |
722 | { "bps", "throttling.bps-total" }, |
723 | { "bps_rd", "throttling.bps-read" }, | |
724 | { "bps_wr", "throttling.bps-write" }, | |
57975222 | 725 | |
247147fb KW |
726 | { "iops_max", "throttling.iops-total-max" }, |
727 | { "iops_rd_max", "throttling.iops-read-max" }, | |
728 | { "iops_wr_max", "throttling.iops-write-max" }, | |
3e9fab69 | 729 | |
247147fb KW |
730 | { "bps_max", "throttling.bps-total-max" }, |
731 | { "bps_rd_max", "throttling.bps-read-max" }, | |
732 | { "bps_wr_max", "throttling.bps-write-max" }, | |
3e9fab69 | 733 | |
247147fb | 734 | { "iops_size", "throttling.iops-size" }, |
2024c1df | 735 | |
247147fb KW |
736 | { "readonly", "read-only" }, |
737 | }; | |
738 | ||
739 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { | |
5abbf0ee KW |
740 | qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to, |
741 | &local_err); | |
742 | if (local_err) { | |
743 | error_report("%s", error_get_pretty(local_err)); | |
744 | error_free(local_err); | |
745 | return NULL; | |
746 | } | |
247147fb | 747 | } |
0f227a94 | 748 | |
29c4e2b5 KW |
749 | value = qemu_opt_get(all_opts, "cache"); |
750 | if (value) { | |
751 | int flags = 0; | |
752 | ||
753 | if (bdrv_parse_cache_flags(value, &flags) != 0) { | |
754 | error_report("invalid cache option"); | |
755 | return NULL; | |
756 | } | |
757 | ||
758 | /* Specific options take precedence */ | |
759 | if (!qemu_opt_get(all_opts, "cache.writeback")) { | |
760 | qemu_opt_set_bool(all_opts, "cache.writeback", | |
761 | !!(flags & BDRV_O_CACHE_WB)); | |
762 | } | |
763 | if (!qemu_opt_get(all_opts, "cache.direct")) { | |
764 | qemu_opt_set_bool(all_opts, "cache.direct", | |
765 | !!(flags & BDRV_O_NOCACHE)); | |
766 | } | |
767 | if (!qemu_opt_get(all_opts, "cache.no-flush")) { | |
768 | qemu_opt_set_bool(all_opts, "cache.no-flush", | |
769 | !!(flags & BDRV_O_NO_FLUSH)); | |
770 | } | |
771 | qemu_opt_unset(all_opts, "cache"); | |
772 | } | |
773 | ||
f298d071 KW |
774 | /* Get a QDict for processing the options */ |
775 | bs_opts = qdict_new(); | |
776 | qemu_opts_to_qdict(all_opts, bs_opts); | |
777 | ||
87ea75d5 PC |
778 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, |
779 | &error_abort); | |
33cb7dc8 | 780 | qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err); |
84d18f06 | 781 | if (local_err) { |
e8817e7b | 782 | error_report("%s", error_get_pretty(local_err)); |
33cb7dc8 KW |
783 | error_free(local_err); |
784 | goto fail; | |
785 | } | |
786 | ||
26929298 KW |
787 | /* Deprecated option boot=[on|off] */ |
788 | if (qemu_opt_get(legacy_opts, "boot") != NULL) { | |
789 | fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " | |
790 | "ignored. Future versions will reject this parameter. Please " | |
791 | "update your scripts.\n"); | |
792 | } | |
793 | ||
33cb7dc8 KW |
794 | /* Media type */ |
795 | value = qemu_opt_get(legacy_opts, "media"); | |
796 | if (value) { | |
797 | if (!strcmp(value, "disk")) { | |
798 | media = MEDIA_DISK; | |
799 | } else if (!strcmp(value, "cdrom")) { | |
800 | media = MEDIA_CDROM; | |
a7fdbcf0 | 801 | read_only = true; |
33cb7dc8 KW |
802 | } else { |
803 | error_report("'%s' invalid media", value); | |
804 | goto fail; | |
805 | } | |
806 | } | |
807 | ||
0ebd24e0 | 808 | /* copy-on-read is disabled with a warning for read-only devices */ |
a7fdbcf0 | 809 | read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false); |
0ebd24e0 KW |
810 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); |
811 | ||
812 | if (read_only && copy_on_read) { | |
813 | error_report("warning: disabling copy-on-read on read-only drive"); | |
814 | copy_on_read = false; | |
815 | } | |
816 | ||
817 | qdict_put(bs_opts, "read-only", | |
818 | qstring_from_str(read_only ? "on" : "off")); | |
819 | qdict_put(bs_opts, "copy-on-read", | |
820 | qstring_from_str(copy_on_read ? "on" :"off")); | |
821 | ||
593d464b KW |
822 | /* Controller type */ |
823 | value = qemu_opt_get(legacy_opts, "if"); | |
824 | if (value) { | |
825 | for (type = 0; | |
826 | type < IF_COUNT && strcmp(value, if_name[type]); | |
827 | type++) { | |
828 | } | |
829 | if (type == IF_COUNT) { | |
830 | error_report("unsupported bus type '%s'", value); | |
831 | goto fail; | |
832 | } | |
833 | } else { | |
834 | type = block_default_type; | |
835 | } | |
836 | ||
b41a7338 KW |
837 | /* Geometry */ |
838 | cyls = qemu_opt_get_number(legacy_opts, "cyls", 0); | |
839 | heads = qemu_opt_get_number(legacy_opts, "heads", 0); | |
840 | secs = qemu_opt_get_number(legacy_opts, "secs", 0); | |
841 | ||
842 | if (cyls || heads || secs) { | |
843 | if (cyls < 1) { | |
844 | error_report("invalid physical cyls number"); | |
845 | goto fail; | |
846 | } | |
847 | if (heads < 1) { | |
848 | error_report("invalid physical heads number"); | |
849 | goto fail; | |
850 | } | |
851 | if (secs < 1) { | |
852 | error_report("invalid physical secs number"); | |
853 | goto fail; | |
854 | } | |
855 | } | |
856 | ||
857 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
858 | value = qemu_opt_get(legacy_opts, "trans"); | |
859 | if (value != NULL) { | |
860 | if (!cyls) { | |
861 | error_report("'%s' trans must be used with cyls, heads and secs", | |
862 | value); | |
863 | goto fail; | |
864 | } | |
865 | if (!strcmp(value, "none")) { | |
866 | translation = BIOS_ATA_TRANSLATION_NONE; | |
867 | } else if (!strcmp(value, "lba")) { | |
868 | translation = BIOS_ATA_TRANSLATION_LBA; | |
f31c41ff PB |
869 | } else if (!strcmp(value, "large")) { |
870 | translation = BIOS_ATA_TRANSLATION_LARGE; | |
871 | } else if (!strcmp(value, "rechs")) { | |
872 | translation = BIOS_ATA_TRANSLATION_RECHS; | |
b41a7338 KW |
873 | } else if (!strcmp(value, "auto")) { |
874 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
875 | } else { | |
876 | error_report("'%s' invalid translation type", value); | |
877 | goto fail; | |
878 | } | |
879 | } | |
880 | ||
881 | if (media == MEDIA_CDROM) { | |
882 | if (cyls || secs || heads) { | |
883 | error_report("CHS can't be set with media=cdrom"); | |
884 | goto fail; | |
885 | } | |
886 | } | |
887 | ||
87a899c5 KW |
888 | /* Device address specified by bus/unit or index. |
889 | * If none was specified, try to find the first free one. */ | |
890 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
891 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
892 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
893 | ||
894 | max_devs = if_max_devs[type]; | |
895 | ||
896 | if (index != -1) { | |
897 | if (bus_id != 0 || unit_id != -1) { | |
898 | error_report("index cannot be used with bus and unit"); | |
899 | goto fail; | |
900 | } | |
901 | bus_id = drive_index_to_bus_id(type, index); | |
902 | unit_id = drive_index_to_unit_id(type, index); | |
903 | } | |
904 | ||
905 | if (unit_id == -1) { | |
906 | unit_id = 0; | |
907 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
908 | unit_id++; | |
909 | if (max_devs && unit_id >= max_devs) { | |
910 | unit_id -= max_devs; | |
911 | bus_id++; | |
912 | } | |
913 | } | |
914 | } | |
915 | ||
916 | if (max_devs && unit_id >= max_devs) { | |
917 | error_report("unit %d too big (max is %d)", unit_id, max_devs - 1); | |
918 | goto fail; | |
919 | } | |
920 | ||
921 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
922 | error_report("drive with bus=%d, unit=%d (index=%d) exists", | |
923 | bus_id, unit_id, index); | |
924 | goto fail; | |
925 | } | |
926 | ||
bcf83158 KW |
927 | /* Serial number */ |
928 | serial = qemu_opt_get(legacy_opts, "serial"); | |
929 | ||
87a899c5 KW |
930 | /* no id supplied -> create one */ |
931 | if (qemu_opts_id(all_opts) == NULL) { | |
932 | char *new_id; | |
933 | const char *mediastr = ""; | |
934 | if (type == IF_IDE || type == IF_SCSI) { | |
935 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
936 | } | |
937 | if (max_devs) { | |
938 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
939 | mediastr, unit_id); | |
940 | } else { | |
941 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
942 | mediastr, unit_id); | |
943 | } | |
944 | qdict_put(bs_opts, "id", qstring_from_str(new_id)); | |
945 | g_free(new_id); | |
946 | } | |
947 | ||
394c7d4d KW |
948 | /* Add virtio block device */ |
949 | devaddr = qemu_opt_get(legacy_opts, "addr"); | |
950 | if (devaddr && type != IF_VIRTIO) { | |
951 | error_report("addr is not supported by this bus type"); | |
952 | goto fail; | |
953 | } | |
954 | ||
955 | if (type == IF_VIRTIO) { | |
956 | QemuOpts *devopts; | |
87ea75d5 PC |
957 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
958 | &error_abort); | |
394c7d4d KW |
959 | if (arch_type == QEMU_ARCH_S390X) { |
960 | qemu_opt_set(devopts, "driver", "virtio-blk-s390"); | |
961 | } else { | |
962 | qemu_opt_set(devopts, "driver", "virtio-blk-pci"); | |
963 | } | |
964 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id")); | |
965 | if (devaddr) { | |
966 | qemu_opt_set(devopts, "addr", devaddr); | |
967 | } | |
968 | } | |
969 | ||
d095b465 HR |
970 | filename = qemu_opt_get(legacy_opts, "file"); |
971 | ||
ee13ed1c KW |
972 | /* Check werror/rerror compatibility with if=... */ |
973 | werror = qemu_opt_get(legacy_opts, "werror"); | |
974 | if (werror != NULL) { | |
975 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
976 | type != IF_NONE) { | |
977 | error_report("werror is not supported by this bus type"); | |
978 | goto fail; | |
979 | } | |
980 | qdict_put(bs_opts, "werror", qstring_from_str(werror)); | |
981 | } | |
982 | ||
983 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
984 | if (rerror != NULL) { | |
985 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
986 | type != IF_NONE) { | |
987 | error_report("rerror is not supported by this bus type"); | |
988 | goto fail; | |
989 | } | |
990 | qdict_put(bs_opts, "rerror", qstring_from_str(rerror)); | |
991 | } | |
992 | ||
2d246f01 | 993 | /* Actual block device init: Functionality shared with blockdev-add */ |
18e46a03 | 994 | blk = blockdev_init(filename, bs_opts, &local_err); |
3cb0e25c | 995 | bs_opts = NULL; |
18e46a03 | 996 | if (!blk) { |
84d18f06 | 997 | if (local_err) { |
e8817e7b | 998 | error_report("%s", error_get_pretty(local_err)); |
b681072d KW |
999 | error_free(local_err); |
1000 | } | |
2d246f01 | 1001 | goto fail; |
b681072d | 1002 | } else { |
84d18f06 | 1003 | assert(!local_err); |
2d246f01 KW |
1004 | } |
1005 | ||
1006 | /* Set legacy DriveInfo fields */ | |
18e46a03 | 1007 | dinfo = blk_legacy_dinfo(blk); |
2d246f01 | 1008 | dinfo->enable_auto_del = true; |
f298d071 | 1009 | dinfo->opts = all_opts; |
2d246f01 | 1010 | |
b41a7338 KW |
1011 | dinfo->cyls = cyls; |
1012 | dinfo->heads = heads; | |
1013 | dinfo->secs = secs; | |
1014 | dinfo->trans = translation; | |
1015 | ||
ee13ed1c | 1016 | dinfo->type = type; |
87a899c5 KW |
1017 | dinfo->bus = bus_id; |
1018 | dinfo->unit = unit_id; | |
394c7d4d | 1019 | dinfo->devaddr = devaddr; |
87a899c5 | 1020 | |
bcf83158 KW |
1021 | dinfo->serial = g_strdup(serial); |
1022 | ||
e34ef046 KW |
1023 | switch(type) { |
1024 | case IF_IDE: | |
1025 | case IF_SCSI: | |
1026 | case IF_XEN: | |
1027 | case IF_NONE: | |
1028 | dinfo->media_cd = media == MEDIA_CDROM; | |
1029 | break; | |
1030 | default: | |
1031 | break; | |
1032 | } | |
1033 | ||
2d246f01 | 1034 | fail: |
33cb7dc8 | 1035 | qemu_opts_del(legacy_opts); |
3cb0e25c | 1036 | QDECREF(bs_opts); |
2d246f01 | 1037 | return dinfo; |
57975222 KW |
1038 | } |
1039 | ||
666daa68 MA |
1040 | void do_commit(Monitor *mon, const QDict *qdict) |
1041 | { | |
666daa68 | 1042 | const char *device = qdict_get_str(qdict, "device"); |
6ab4b5ab | 1043 | BlockDriverState *bs; |
e8877497 | 1044 | int ret; |
666daa68 | 1045 | |
6ab4b5ab | 1046 | if (!strcmp(device, "all")) { |
e8877497 | 1047 | ret = bdrv_commit_all(); |
6ab4b5ab MA |
1048 | } else { |
1049 | bs = bdrv_find(device); | |
ac59eb95 | 1050 | if (!bs) { |
58513bde | 1051 | monitor_printf(mon, "Device '%s' not found\n", device); |
ac59eb95 | 1052 | return; |
6ab4b5ab | 1053 | } |
2d3735d3 | 1054 | ret = bdrv_commit(bs); |
58513bde JC |
1055 | } |
1056 | if (ret < 0) { | |
1057 | monitor_printf(mon, "'commit' error for '%s': %s\n", device, | |
1058 | strerror(-ret)); | |
666daa68 MA |
1059 | } |
1060 | } | |
1061 | ||
6cc2a415 PB |
1062 | static void blockdev_do_action(int kind, void *data, Error **errp) |
1063 | { | |
c8a83e85 KW |
1064 | TransactionAction action; |
1065 | TransactionActionList list; | |
6cc2a415 PB |
1066 | |
1067 | action.kind = kind; | |
1068 | action.data = data; | |
1069 | list.value = &action; | |
1070 | list.next = NULL; | |
1071 | qmp_transaction(&list, errp); | |
1072 | } | |
1073 | ||
0901f67e BC |
1074 | void qmp_blockdev_snapshot_sync(bool has_device, const char *device, |
1075 | bool has_node_name, const char *node_name, | |
1076 | const char *snapshot_file, | |
1077 | bool has_snapshot_node_name, | |
1078 | const char *snapshot_node_name, | |
6106e249 | 1079 | bool has_format, const char *format, |
0901f67e | 1080 | bool has_mode, NewImageMode mode, Error **errp) |
f8882568 | 1081 | { |
6cc2a415 | 1082 | BlockdevSnapshot snapshot = { |
0901f67e | 1083 | .has_device = has_device, |
6cc2a415 | 1084 | .device = (char *) device, |
0901f67e BC |
1085 | .has_node_name = has_node_name, |
1086 | .node_name = (char *) node_name, | |
6cc2a415 | 1087 | .snapshot_file = (char *) snapshot_file, |
0901f67e BC |
1088 | .has_snapshot_node_name = has_snapshot_node_name, |
1089 | .snapshot_node_name = (char *) snapshot_node_name, | |
6cc2a415 PB |
1090 | .has_format = has_format, |
1091 | .format = (char *) format, | |
1092 | .has_mode = has_mode, | |
1093 | .mode = mode, | |
1094 | }; | |
c8a83e85 KW |
1095 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
1096 | &snapshot, errp); | |
f8882568 JS |
1097 | } |
1098 | ||
f323bc9e WX |
1099 | void qmp_blockdev_snapshot_internal_sync(const char *device, |
1100 | const char *name, | |
1101 | Error **errp) | |
1102 | { | |
1103 | BlockdevSnapshotInternal snapshot = { | |
1104 | .device = (char *) device, | |
1105 | .name = (char *) name | |
1106 | }; | |
1107 | ||
1108 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
1109 | &snapshot, errp); | |
1110 | } | |
1111 | ||
44e3e053 WX |
1112 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
1113 | bool has_id, | |
1114 | const char *id, | |
1115 | bool has_name, | |
1116 | const char *name, | |
1117 | Error **errp) | |
1118 | { | |
1119 | BlockDriverState *bs = bdrv_find(device); | |
1120 | QEMUSnapshotInfo sn; | |
1121 | Error *local_err = NULL; | |
1122 | SnapshotInfo *info = NULL; | |
1123 | int ret; | |
1124 | ||
1125 | if (!bs) { | |
1126 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1127 | return NULL; | |
1128 | } | |
1129 | ||
1130 | if (!has_id) { | |
1131 | id = NULL; | |
1132 | } | |
1133 | ||
1134 | if (!has_name) { | |
1135 | name = NULL; | |
1136 | } | |
1137 | ||
1138 | if (!id && !name) { | |
1139 | error_setg(errp, "Name or id must be provided"); | |
1140 | return NULL; | |
1141 | } | |
1142 | ||
1143 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); | |
84d18f06 | 1144 | if (local_err) { |
44e3e053 WX |
1145 | error_propagate(errp, local_err); |
1146 | return NULL; | |
1147 | } | |
1148 | if (!ret) { | |
1149 | error_setg(errp, | |
1150 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1151 | "device '%s'", | |
1152 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
1153 | return NULL; | |
1154 | } | |
1155 | ||
1156 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
84d18f06 | 1157 | if (local_err) { |
44e3e053 WX |
1158 | error_propagate(errp, local_err); |
1159 | return NULL; | |
1160 | } | |
1161 | ||
5839e53b | 1162 | info = g_new0(SnapshotInfo, 1); |
44e3e053 WX |
1163 | info->id = g_strdup(sn.id_str); |
1164 | info->name = g_strdup(sn.name); | |
1165 | info->date_nsec = sn.date_nsec; | |
1166 | info->date_sec = sn.date_sec; | |
1167 | info->vm_state_size = sn.vm_state_size; | |
1168 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1169 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
1170 | ||
1171 | return info; | |
1172 | } | |
8802d1fd JC |
1173 | |
1174 | /* New and old BlockDriverState structs for group snapshots */ | |
ba0c86a3 | 1175 | |
ba5d6ab6 | 1176 | typedef struct BlkTransactionState BlkTransactionState; |
ba0c86a3 WX |
1177 | |
1178 | /* Only prepare() may fail. In a single transaction, only one of commit() or | |
1179 | abort() will be called, clean() will always be called if it present. */ | |
1180 | typedef struct BdrvActionOps { | |
1181 | /* Size of state struct, in bytes. */ | |
1182 | size_t instance_size; | |
1183 | /* Prepare the work, must NOT be NULL. */ | |
ba5d6ab6 | 1184 | void (*prepare)(BlkTransactionState *common, Error **errp); |
f9ea81e8 | 1185 | /* Commit the changes, can be NULL. */ |
ba5d6ab6 | 1186 | void (*commit)(BlkTransactionState *common); |
ba0c86a3 | 1187 | /* Abort the changes on fail, can be NULL. */ |
ba5d6ab6 | 1188 | void (*abort)(BlkTransactionState *common); |
ba0c86a3 | 1189 | /* Clean up resource in the end, can be NULL. */ |
ba5d6ab6 | 1190 | void (*clean)(BlkTransactionState *common); |
ba0c86a3 WX |
1191 | } BdrvActionOps; |
1192 | ||
1193 | /* | |
1194 | * This structure must be arranged as first member in child type, assuming | |
1195 | * that compiler will also arrange it to the same address with parent instance. | |
1196 | * Later it will be used in free(). | |
1197 | */ | |
ba5d6ab6 | 1198 | struct BlkTransactionState { |
c8a83e85 | 1199 | TransactionAction *action; |
ba0c86a3 | 1200 | const BdrvActionOps *ops; |
ba5d6ab6 | 1201 | QSIMPLEQ_ENTRY(BlkTransactionState) entry; |
ba0c86a3 WX |
1202 | }; |
1203 | ||
bbe86010 WX |
1204 | /* internal snapshot private data */ |
1205 | typedef struct InternalSnapshotState { | |
1206 | BlkTransactionState common; | |
1207 | BlockDriverState *bs; | |
1208 | QEMUSnapshotInfo sn; | |
1209 | } InternalSnapshotState; | |
1210 | ||
1211 | static void internal_snapshot_prepare(BlkTransactionState *common, | |
1212 | Error **errp) | |
1213 | { | |
f70edf99 | 1214 | Error *local_err = NULL; |
bbe86010 WX |
1215 | const char *device; |
1216 | const char *name; | |
1217 | BlockDriverState *bs; | |
1218 | QEMUSnapshotInfo old_sn, *sn; | |
1219 | bool ret; | |
1220 | qemu_timeval tv; | |
1221 | BlockdevSnapshotInternal *internal; | |
1222 | InternalSnapshotState *state; | |
1223 | int ret1; | |
1224 | ||
1225 | g_assert(common->action->kind == | |
1226 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); | |
1227 | internal = common->action->blockdev_snapshot_internal_sync; | |
1228 | state = DO_UPCAST(InternalSnapshotState, common, common); | |
1229 | ||
1230 | /* 1. parse input */ | |
1231 | device = internal->device; | |
1232 | name = internal->name; | |
1233 | ||
1234 | /* 2. check for validation */ | |
1235 | bs = bdrv_find(device); | |
1236 | if (!bs) { | |
1237 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1238 | return; | |
1239 | } | |
1240 | ||
1241 | if (!bdrv_is_inserted(bs)) { | |
1242 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1243 | return; | |
1244 | } | |
1245 | ||
1246 | if (bdrv_is_read_only(bs)) { | |
1247 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1248 | return; | |
1249 | } | |
1250 | ||
1251 | if (!bdrv_can_snapshot(bs)) { | |
1252 | error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, | |
1253 | bs->drv->format_name, device, "internal snapshot"); | |
1254 | return; | |
1255 | } | |
1256 | ||
1257 | if (!strlen(name)) { | |
1258 | error_setg(errp, "Name is empty"); | |
1259 | return; | |
1260 | } | |
1261 | ||
1262 | /* check whether a snapshot with name exist */ | |
f70edf99 MA |
1263 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, |
1264 | &local_err); | |
1265 | if (local_err) { | |
1266 | error_propagate(errp, local_err); | |
bbe86010 WX |
1267 | return; |
1268 | } else if (ret) { | |
1269 | error_setg(errp, | |
1270 | "Snapshot with name '%s' already exists on device '%s'", | |
1271 | name, device); | |
1272 | return; | |
1273 | } | |
1274 | ||
1275 | /* 3. take the snapshot */ | |
1276 | sn = &state->sn; | |
1277 | pstrcpy(sn->name, sizeof(sn->name), name); | |
1278 | qemu_gettimeofday(&tv); | |
1279 | sn->date_sec = tv.tv_sec; | |
1280 | sn->date_nsec = tv.tv_usec * 1000; | |
1281 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
1282 | ||
1283 | ret1 = bdrv_snapshot_create(bs, sn); | |
1284 | if (ret1 < 0) { | |
1285 | error_setg_errno(errp, -ret1, | |
1286 | "Failed to create snapshot '%s' on device '%s'", | |
1287 | name, device); | |
1288 | return; | |
1289 | } | |
1290 | ||
1291 | /* 4. succeed, mark a snapshot is created */ | |
1292 | state->bs = bs; | |
1293 | } | |
1294 | ||
1295 | static void internal_snapshot_abort(BlkTransactionState *common) | |
1296 | { | |
1297 | InternalSnapshotState *state = | |
1298 | DO_UPCAST(InternalSnapshotState, common, common); | |
1299 | BlockDriverState *bs = state->bs; | |
1300 | QEMUSnapshotInfo *sn = &state->sn; | |
1301 | Error *local_error = NULL; | |
1302 | ||
1303 | if (!bs) { | |
1304 | return; | |
1305 | } | |
1306 | ||
1307 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { | |
1308 | error_report("Failed to delete snapshot with id '%s' and name '%s' on " | |
1309 | "device '%s' in abort: %s", | |
1310 | sn->id_str, | |
1311 | sn->name, | |
1312 | bdrv_get_device_name(bs), | |
1313 | error_get_pretty(local_error)); | |
1314 | error_free(local_error); | |
1315 | } | |
1316 | } | |
1317 | ||
ba0c86a3 | 1318 | /* external snapshot private data */ |
ba5d6ab6 SH |
1319 | typedef struct ExternalSnapshotState { |
1320 | BlkTransactionState common; | |
8802d1fd JC |
1321 | BlockDriverState *old_bs; |
1322 | BlockDriverState *new_bs; | |
ba5d6ab6 | 1323 | } ExternalSnapshotState; |
8802d1fd | 1324 | |
ba5d6ab6 | 1325 | static void external_snapshot_prepare(BlkTransactionState *common, |
9b9877ee WX |
1326 | Error **errp) |
1327 | { | |
9b9877ee WX |
1328 | BlockDriver *drv; |
1329 | int flags, ret; | |
0901f67e | 1330 | QDict *options = NULL; |
9b9877ee | 1331 | Error *local_err = NULL; |
0901f67e | 1332 | bool has_device = false; |
e2a31e87 | 1333 | const char *device; |
0901f67e BC |
1334 | bool has_node_name = false; |
1335 | const char *node_name; | |
1336 | bool has_snapshot_node_name = false; | |
1337 | const char *snapshot_node_name; | |
e2a31e87 WX |
1338 | const char *new_image_file; |
1339 | const char *format = "qcow2"; | |
1340 | enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
ba5d6ab6 SH |
1341 | ExternalSnapshotState *state = |
1342 | DO_UPCAST(ExternalSnapshotState, common, common); | |
c8a83e85 | 1343 | TransactionAction *action = common->action; |
9b9877ee | 1344 | |
e2a31e87 | 1345 | /* get parameters */ |
c8a83e85 | 1346 | g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); |
e2a31e87 | 1347 | |
0901f67e | 1348 | has_device = action->blockdev_snapshot_sync->has_device; |
e2a31e87 | 1349 | device = action->blockdev_snapshot_sync->device; |
0901f67e BC |
1350 | has_node_name = action->blockdev_snapshot_sync->has_node_name; |
1351 | node_name = action->blockdev_snapshot_sync->node_name; | |
1352 | has_snapshot_node_name = | |
1353 | action->blockdev_snapshot_sync->has_snapshot_node_name; | |
1354 | snapshot_node_name = action->blockdev_snapshot_sync->snapshot_node_name; | |
1355 | ||
e2a31e87 WX |
1356 | new_image_file = action->blockdev_snapshot_sync->snapshot_file; |
1357 | if (action->blockdev_snapshot_sync->has_format) { | |
1358 | format = action->blockdev_snapshot_sync->format; | |
1359 | } | |
1360 | if (action->blockdev_snapshot_sync->has_mode) { | |
1361 | mode = action->blockdev_snapshot_sync->mode; | |
1362 | } | |
1363 | ||
1364 | /* start processing */ | |
9b9877ee WX |
1365 | drv = bdrv_find_format(format); |
1366 | if (!drv) { | |
1367 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
1368 | return; | |
1369 | } | |
1370 | ||
0901f67e BC |
1371 | state->old_bs = bdrv_lookup_bs(has_device ? device : NULL, |
1372 | has_node_name ? node_name : NULL, | |
1373 | &local_err); | |
84d18f06 | 1374 | if (local_err) { |
0901f67e BC |
1375 | error_propagate(errp, local_err); |
1376 | return; | |
1377 | } | |
1378 | ||
1379 | if (has_node_name && !has_snapshot_node_name) { | |
1380 | error_setg(errp, "New snapshot node name missing"); | |
1381 | return; | |
1382 | } | |
1383 | ||
1384 | if (has_snapshot_node_name && bdrv_find_node(snapshot_node_name)) { | |
1385 | error_setg(errp, "New snapshot node name already existing"); | |
9b9877ee WX |
1386 | return; |
1387 | } | |
1388 | ||
ba5d6ab6 | 1389 | if (!bdrv_is_inserted(state->old_bs)) { |
9b9877ee WX |
1390 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1391 | return; | |
1392 | } | |
1393 | ||
3718d8ab FZ |
1394 | if (bdrv_op_is_blocked(state->old_bs, |
1395 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
9b9877ee WX |
1396 | return; |
1397 | } | |
1398 | ||
ba5d6ab6 SH |
1399 | if (!bdrv_is_read_only(state->old_bs)) { |
1400 | if (bdrv_flush(state->old_bs)) { | |
9b9877ee WX |
1401 | error_set(errp, QERR_IO_ERROR); |
1402 | return; | |
1403 | } | |
1404 | } | |
1405 | ||
212a5a8f | 1406 | if (!bdrv_is_first_non_filter(state->old_bs)) { |
f6186f49 BC |
1407 | error_set(errp, QERR_FEATURE_DISABLED, "snapshot"); |
1408 | return; | |
1409 | } | |
1410 | ||
ba5d6ab6 | 1411 | flags = state->old_bs->open_flags; |
9b9877ee | 1412 | |
9b9877ee WX |
1413 | /* create new image w/backing file */ |
1414 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
1415 | bdrv_img_create(new_image_file, format, | |
ba5d6ab6 SH |
1416 | state->old_bs->filename, |
1417 | state->old_bs->drv->format_name, | |
9b9877ee | 1418 | NULL, -1, flags, &local_err, false); |
84d18f06 | 1419 | if (local_err) { |
9b9877ee WX |
1420 | error_propagate(errp, local_err); |
1421 | return; | |
1422 | } | |
1423 | } | |
1424 | ||
0901f67e BC |
1425 | if (has_snapshot_node_name) { |
1426 | options = qdict_new(); | |
1427 | qdict_put(options, "node-name", | |
1428 | qstring_from_str(snapshot_node_name)); | |
1429 | } | |
1430 | ||
9b9877ee WX |
1431 | /* TODO Inherit bs->options or only take explicit options with an |
1432 | * extended QMP command? */ | |
f67503e5 | 1433 | assert(state->new_bs == NULL); |
ddf5636d | 1434 | ret = bdrv_open(&state->new_bs, new_image_file, NULL, options, |
34b5d2c6 | 1435 | flags | BDRV_O_NO_BACKING, drv, &local_err); |
f67503e5 | 1436 | /* We will manually add the backing_hd field to the bs later */ |
9b9877ee | 1437 | if (ret != 0) { |
34b5d2c6 | 1438 | error_propagate(errp, local_err); |
9b9877ee WX |
1439 | } |
1440 | } | |
1441 | ||
ba5d6ab6 | 1442 | static void external_snapshot_commit(BlkTransactionState *common) |
3b0047e8 | 1443 | { |
ba5d6ab6 SH |
1444 | ExternalSnapshotState *state = |
1445 | DO_UPCAST(ExternalSnapshotState, common, common); | |
ba0c86a3 | 1446 | |
ba5d6ab6 SH |
1447 | /* This removes our old bs and adds the new bs */ |
1448 | bdrv_append(state->new_bs, state->old_bs); | |
3b0047e8 WX |
1449 | /* We don't need (or want) to use the transactional |
1450 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1451 | * don't want to abort all of them if one of them fails the reopen */ | |
ba5d6ab6 | 1452 | bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, |
3b0047e8 WX |
1453 | NULL); |
1454 | } | |
1455 | ||
ba5d6ab6 | 1456 | static void external_snapshot_abort(BlkTransactionState *common) |
96b86bf7 | 1457 | { |
ba5d6ab6 SH |
1458 | ExternalSnapshotState *state = |
1459 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1460 | if (state->new_bs) { | |
4f6fd349 | 1461 | bdrv_unref(state->new_bs); |
96b86bf7 WX |
1462 | } |
1463 | } | |
1464 | ||
3037f364 SH |
1465 | typedef struct DriveBackupState { |
1466 | BlkTransactionState common; | |
1467 | BlockDriverState *bs; | |
1468 | BlockJob *job; | |
1469 | } DriveBackupState; | |
1470 | ||
1471 | static void drive_backup_prepare(BlkTransactionState *common, Error **errp) | |
1472 | { | |
1473 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1474 | DriveBackup *backup; | |
1475 | Error *local_err = NULL; | |
1476 | ||
1477 | assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); | |
1478 | backup = common->action->drive_backup; | |
1479 | ||
1480 | qmp_drive_backup(backup->device, backup->target, | |
1481 | backup->has_format, backup->format, | |
b53169ea | 1482 | backup->sync, |
3037f364 SH |
1483 | backup->has_mode, backup->mode, |
1484 | backup->has_speed, backup->speed, | |
1485 | backup->has_on_source_error, backup->on_source_error, | |
1486 | backup->has_on_target_error, backup->on_target_error, | |
1487 | &local_err); | |
84d18f06 | 1488 | if (local_err) { |
3037f364 SH |
1489 | error_propagate(errp, local_err); |
1490 | state->bs = NULL; | |
1491 | state->job = NULL; | |
1492 | return; | |
1493 | } | |
1494 | ||
1495 | state->bs = bdrv_find(backup->device); | |
1496 | state->job = state->bs->job; | |
1497 | } | |
1498 | ||
1499 | static void drive_backup_abort(BlkTransactionState *common) | |
1500 | { | |
1501 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1502 | BlockDriverState *bs = state->bs; | |
1503 | ||
1504 | /* Only cancel if it's the job we started */ | |
1505 | if (bs && bs->job && bs->job == state->job) { | |
1506 | block_job_cancel_sync(bs->job); | |
1507 | } | |
1508 | } | |
1509 | ||
78b18b78 SH |
1510 | static void abort_prepare(BlkTransactionState *common, Error **errp) |
1511 | { | |
1512 | error_setg(errp, "Transaction aborted using Abort action"); | |
1513 | } | |
1514 | ||
1515 | static void abort_commit(BlkTransactionState *common) | |
1516 | { | |
dfc6f865 | 1517 | g_assert_not_reached(); /* this action never succeeds */ |
78b18b78 SH |
1518 | } |
1519 | ||
ba0c86a3 | 1520 | static const BdrvActionOps actions[] = { |
c8a83e85 | 1521 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
ba5d6ab6 | 1522 | .instance_size = sizeof(ExternalSnapshotState), |
ba0c86a3 WX |
1523 | .prepare = external_snapshot_prepare, |
1524 | .commit = external_snapshot_commit, | |
1525 | .abort = external_snapshot_abort, | |
1526 | }, | |
3037f364 SH |
1527 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
1528 | .instance_size = sizeof(DriveBackupState), | |
1529 | .prepare = drive_backup_prepare, | |
1530 | .abort = drive_backup_abort, | |
1531 | }, | |
78b18b78 SH |
1532 | [TRANSACTION_ACTION_KIND_ABORT] = { |
1533 | .instance_size = sizeof(BlkTransactionState), | |
1534 | .prepare = abort_prepare, | |
1535 | .commit = abort_commit, | |
1536 | }, | |
bbe86010 WX |
1537 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
1538 | .instance_size = sizeof(InternalSnapshotState), | |
1539 | .prepare = internal_snapshot_prepare, | |
1540 | .abort = internal_snapshot_abort, | |
1541 | }, | |
ba0c86a3 WX |
1542 | }; |
1543 | ||
8802d1fd JC |
1544 | /* |
1545 | * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail | |
1546 | * then we do not pivot any of the devices in the group, and abandon the | |
1547 | * snapshots | |
1548 | */ | |
c8a83e85 | 1549 | void qmp_transaction(TransactionActionList *dev_list, Error **errp) |
8802d1fd | 1550 | { |
c8a83e85 | 1551 | TransactionActionList *dev_entry = dev_list; |
ba5d6ab6 | 1552 | BlkTransactionState *state, *next; |
43e17041 | 1553 | Error *local_err = NULL; |
8802d1fd | 1554 | |
ba5d6ab6 | 1555 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; |
8802d1fd JC |
1556 | QSIMPLEQ_INIT(&snap_bdrv_states); |
1557 | ||
1558 | /* drain all i/o before any snapshots */ | |
1559 | bdrv_drain_all(); | |
1560 | ||
1561 | /* We don't do anything in this loop that commits us to the snapshot */ | |
1562 | while (NULL != dev_entry) { | |
c8a83e85 | 1563 | TransactionAction *dev_info = NULL; |
ba0c86a3 | 1564 | const BdrvActionOps *ops; |
52e7c241 | 1565 | |
8802d1fd JC |
1566 | dev_info = dev_entry->value; |
1567 | dev_entry = dev_entry->next; | |
1568 | ||
ba0c86a3 WX |
1569 | assert(dev_info->kind < ARRAY_SIZE(actions)); |
1570 | ||
1571 | ops = &actions[dev_info->kind]; | |
aa3fe714 HR |
1572 | assert(ops->instance_size > 0); |
1573 | ||
ba5d6ab6 SH |
1574 | state = g_malloc0(ops->instance_size); |
1575 | state->ops = ops; | |
1576 | state->action = dev_info; | |
1577 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); | |
8802d1fd | 1578 | |
ba5d6ab6 | 1579 | state->ops->prepare(state, &local_err); |
84d18f06 | 1580 | if (local_err) { |
ba0c86a3 WX |
1581 | error_propagate(errp, local_err); |
1582 | goto delete_and_fail; | |
8802d1fd | 1583 | } |
8802d1fd JC |
1584 | } |
1585 | ||
ba5d6ab6 | 1586 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
f9ea81e8 SH |
1587 | if (state->ops->commit) { |
1588 | state->ops->commit(state); | |
1589 | } | |
8802d1fd JC |
1590 | } |
1591 | ||
1592 | /* success */ | |
1593 | goto exit; | |
1594 | ||
1595 | delete_and_fail: | |
1596 | /* | |
1597 | * failure, and it is all-or-none; abandon each new bs, and keep using | |
1598 | * the original bs for all images | |
1599 | */ | |
ba5d6ab6 SH |
1600 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1601 | if (state->ops->abort) { | |
1602 | state->ops->abort(state); | |
ba0c86a3 | 1603 | } |
8802d1fd JC |
1604 | } |
1605 | exit: | |
ba5d6ab6 SH |
1606 | QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
1607 | if (state->ops->clean) { | |
1608 | state->ops->clean(state); | |
ba0c86a3 | 1609 | } |
ba5d6ab6 | 1610 | g_free(state); |
8802d1fd | 1611 | } |
8802d1fd JC |
1612 | } |
1613 | ||
1614 | ||
92d48558 | 1615 | static void eject_device(BlockDriverState *bs, int force, Error **errp) |
666daa68 | 1616 | { |
3718d8ab | 1617 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) { |
2d3735d3 SH |
1618 | return; |
1619 | } | |
2c6942fa | 1620 | if (!bdrv_dev_has_removable_media(bs)) { |
f231b88d CR |
1621 | error_setg(errp, "Device '%s' is not removable", |
1622 | bdrv_get_device_name(bs)); | |
92d48558 | 1623 | return; |
ea8f942f | 1624 | } |
92d48558 | 1625 | |
025ccaa7 PB |
1626 | if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { |
1627 | bdrv_dev_eject_request(bs, force); | |
1628 | if (!force) { | |
f231b88d CR |
1629 | error_setg(errp, "Device '%s' is locked", |
1630 | bdrv_get_device_name(bs)); | |
92d48558 | 1631 | return; |
025ccaa7 | 1632 | } |
666daa68 | 1633 | } |
92d48558 | 1634 | |
3b5276b5 | 1635 | bdrv_close(bs); |
666daa68 MA |
1636 | } |
1637 | ||
c245b6a3 | 1638 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
666daa68 MA |
1639 | { |
1640 | BlockDriverState *bs; | |
666daa68 | 1641 | |
c245b6a3 | 1642 | bs = bdrv_find(device); |
666daa68 | 1643 | if (!bs) { |
c245b6a3 LC |
1644 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1645 | return; | |
92d48558 LC |
1646 | } |
1647 | ||
c245b6a3 | 1648 | eject_device(bs, force, errp); |
666daa68 MA |
1649 | } |
1650 | ||
12d3ba82 BC |
1651 | void qmp_block_passwd(bool has_device, const char *device, |
1652 | bool has_node_name, const char *node_name, | |
1653 | const char *password, Error **errp) | |
666daa68 | 1654 | { |
12d3ba82 | 1655 | Error *local_err = NULL; |
666daa68 MA |
1656 | BlockDriverState *bs; |
1657 | int err; | |
1658 | ||
12d3ba82 BC |
1659 | bs = bdrv_lookup_bs(has_device ? device : NULL, |
1660 | has_node_name ? node_name : NULL, | |
1661 | &local_err); | |
84d18f06 | 1662 | if (local_err) { |
12d3ba82 | 1663 | error_propagate(errp, local_err); |
a4dea8a9 | 1664 | return; |
666daa68 MA |
1665 | } |
1666 | ||
a4dea8a9 | 1667 | err = bdrv_set_key(bs, password); |
666daa68 | 1668 | if (err == -EINVAL) { |
a4dea8a9 LC |
1669 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1670 | return; | |
666daa68 | 1671 | } else if (err < 0) { |
a4dea8a9 LC |
1672 | error_set(errp, QERR_INVALID_PASSWORD); |
1673 | return; | |
666daa68 | 1674 | } |
666daa68 MA |
1675 | } |
1676 | ||
333a96ec LC |
1677 | static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
1678 | int bdrv_flags, BlockDriver *drv, | |
1679 | const char *password, Error **errp) | |
1680 | { | |
34b5d2c6 | 1681 | Error *local_err = NULL; |
0eef407c LC |
1682 | int ret; |
1683 | ||
ddf5636d | 1684 | ret = bdrv_open(&bs, filename, NULL, NULL, bdrv_flags, drv, &local_err); |
0eef407c | 1685 | if (ret < 0) { |
34b5d2c6 | 1686 | error_propagate(errp, local_err); |
333a96ec LC |
1687 | return; |
1688 | } | |
1689 | ||
1690 | if (bdrv_key_required(bs)) { | |
1691 | if (password) { | |
1692 | if (bdrv_set_key(bs, password) < 0) { | |
1693 | error_set(errp, QERR_INVALID_PASSWORD); | |
1694 | } | |
1695 | } else { | |
1696 | error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), | |
1697 | bdrv_get_encrypted_filename(bs)); | |
1698 | } | |
1699 | } else if (password) { | |
1700 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
1701 | } | |
1702 | } | |
1703 | ||
1704 | void qmp_change_blockdev(const char *device, const char *filename, | |
314f7ea7 | 1705 | const char *format, Error **errp) |
666daa68 MA |
1706 | { |
1707 | BlockDriverState *bs; | |
1708 | BlockDriver *drv = NULL; | |
1709 | int bdrv_flags; | |
92d48558 | 1710 | Error *err = NULL; |
666daa68 MA |
1711 | |
1712 | bs = bdrv_find(device); | |
1713 | if (!bs) { | |
333a96ec LC |
1714 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1715 | return; | |
666daa68 | 1716 | } |
333a96ec LC |
1717 | |
1718 | if (format) { | |
b64ec4e4 | 1719 | drv = bdrv_find_whitelisted_format(format, bs->read_only); |
666daa68 | 1720 | if (!drv) { |
333a96ec LC |
1721 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1722 | return; | |
666daa68 MA |
1723 | } |
1724 | } | |
333a96ec | 1725 | |
92d48558 | 1726 | eject_device(bs, 0, &err); |
84d18f06 | 1727 | if (err) { |
333a96ec LC |
1728 | error_propagate(errp, err); |
1729 | return; | |
666daa68 | 1730 | } |
333a96ec | 1731 | |
528f7663 | 1732 | bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; |
199630b6 | 1733 | bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; |
333a96ec LC |
1734 | |
1735 | qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); | |
666daa68 | 1736 | } |
9063f814 | 1737 | |
727f005e | 1738 | /* throttling disk I/O limits */ |
80047da5 | 1739 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
3e9fab69 BC |
1740 | int64_t bps_wr, |
1741 | int64_t iops, | |
1742 | int64_t iops_rd, | |
1743 | int64_t iops_wr, | |
1744 | bool has_bps_max, | |
1745 | int64_t bps_max, | |
1746 | bool has_bps_rd_max, | |
1747 | int64_t bps_rd_max, | |
1748 | bool has_bps_wr_max, | |
1749 | int64_t bps_wr_max, | |
1750 | bool has_iops_max, | |
1751 | int64_t iops_max, | |
1752 | bool has_iops_rd_max, | |
1753 | int64_t iops_rd_max, | |
1754 | bool has_iops_wr_max, | |
2024c1df BC |
1755 | int64_t iops_wr_max, |
1756 | bool has_iops_size, | |
1757 | int64_t iops_size, Error **errp) | |
727f005e | 1758 | { |
cc0681c4 | 1759 | ThrottleConfig cfg; |
727f005e | 1760 | BlockDriverState *bs; |
b15446fd | 1761 | AioContext *aio_context; |
727f005e | 1762 | |
80047da5 | 1763 | bs = bdrv_find(device); |
727f005e | 1764 | if (!bs) { |
80047da5 LC |
1765 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1766 | return; | |
727f005e ZYW |
1767 | } |
1768 | ||
cc0681c4 BC |
1769 | memset(&cfg, 0, sizeof(cfg)); |
1770 | cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps; | |
1771 | cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd; | |
1772 | cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr; | |
1773 | ||
1774 | cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops; | |
1775 | cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd; | |
1776 | cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr; | |
1777 | ||
3e9fab69 BC |
1778 | if (has_bps_max) { |
1779 | cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max; | |
1780 | } | |
1781 | if (has_bps_rd_max) { | |
1782 | cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max; | |
1783 | } | |
1784 | if (has_bps_wr_max) { | |
1785 | cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max; | |
1786 | } | |
1787 | if (has_iops_max) { | |
1788 | cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max; | |
1789 | } | |
1790 | if (has_iops_rd_max) { | |
1791 | cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max; | |
1792 | } | |
1793 | if (has_iops_wr_max) { | |
1794 | cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max; | |
1795 | } | |
727f005e | 1796 | |
2024c1df BC |
1797 | if (has_iops_size) { |
1798 | cfg.op_size = iops_size; | |
1799 | } | |
cc0681c4 BC |
1800 | |
1801 | if (!check_throttle_config(&cfg, errp)) { | |
80047da5 | 1802 | return; |
727f005e ZYW |
1803 | } |
1804 | ||
b15446fd SH |
1805 | aio_context = bdrv_get_aio_context(bs); |
1806 | aio_context_acquire(aio_context); | |
1807 | ||
cc0681c4 | 1808 | if (!bs->io_limits_enabled && throttle_enabled(&cfg)) { |
727f005e | 1809 | bdrv_io_limits_enable(bs); |
cc0681c4 | 1810 | } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) { |
727f005e | 1811 | bdrv_io_limits_disable(bs); |
cc0681c4 BC |
1812 | } |
1813 | ||
1814 | if (bs->io_limits_enabled) { | |
1815 | bdrv_set_io_limits(bs, &cfg); | |
727f005e | 1816 | } |
b15446fd SH |
1817 | |
1818 | aio_context_release(aio_context); | |
727f005e ZYW |
1819 | } |
1820 | ||
9063f814 RH |
1821 | int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
1822 | { | |
1823 | const char *id = qdict_get_str(qdict, "id"); | |
7e7d56d9 | 1824 | BlockBackend *blk; |
9063f814 | 1825 | BlockDriverState *bs; |
48f364dd | 1826 | DriveInfo *dinfo; |
8ad4202b | 1827 | AioContext *aio_context; |
3718d8ab | 1828 | Error *local_err = NULL; |
9063f814 | 1829 | |
7e7d56d9 MA |
1830 | blk = blk_by_name(id); |
1831 | if (!blk) { | |
b1422f20 | 1832 | error_report("Device '%s' not found", id); |
9063f814 RH |
1833 | return -1; |
1834 | } | |
7e7d56d9 | 1835 | bs = blk_bs(blk); |
8ad4202b | 1836 | |
18e46a03 | 1837 | dinfo = blk_legacy_dinfo(blk); |
48f364dd MA |
1838 | if (dinfo && !dinfo->enable_auto_del) { |
1839 | error_report("Deleting device added with blockdev-add" | |
1840 | " is not supported"); | |
1841 | return -1; | |
1842 | } | |
1843 | ||
8ad4202b SH |
1844 | aio_context = bdrv_get_aio_context(bs); |
1845 | aio_context_acquire(aio_context); | |
1846 | ||
3718d8ab FZ |
1847 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) { |
1848 | error_report("%s", error_get_pretty(local_err)); | |
1849 | error_free(local_err); | |
8ad4202b | 1850 | aio_context_release(aio_context); |
8591675f MT |
1851 | return -1; |
1852 | } | |
9063f814 RH |
1853 | |
1854 | /* quiesce block driver; prevent further io */ | |
922453bc | 1855 | bdrv_drain_all(); |
9063f814 RH |
1856 | bdrv_flush(bs); |
1857 | bdrv_close(bs); | |
1858 | ||
fa879d62 | 1859 | /* if we have a device attached to this BlockDriverState |
d22b2f41 RH |
1860 | * then we need to make the drive anonymous until the device |
1861 | * can be removed. If this is a drive with no device backing | |
1862 | * then we can just get rid of the block driver state right here. | |
1863 | */ | |
fa879d62 | 1864 | if (bdrv_get_attached_dev(bs)) { |
7e7d56d9 | 1865 | blk_hide_on_behalf_of_do_drive_del(blk); |
293c51a6 SH |
1866 | /* Further I/O must not pause the guest */ |
1867 | bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, | |
1868 | BLOCKDEV_ON_ERROR_REPORT); | |
d22b2f41 | 1869 | } else { |
48f364dd | 1870 | drive_del(dinfo); |
9063f814 RH |
1871 | } |
1872 | ||
8ad4202b | 1873 | aio_context_release(aio_context); |
9063f814 RH |
1874 | return 0; |
1875 | } | |
6d4a2b3a | 1876 | |
3b1dbd11 BC |
1877 | void qmp_block_resize(bool has_device, const char *device, |
1878 | bool has_node_name, const char *node_name, | |
1879 | int64_t size, Error **errp) | |
6d4a2b3a | 1880 | { |
3b1dbd11 | 1881 | Error *local_err = NULL; |
6d4a2b3a | 1882 | BlockDriverState *bs; |
927e0e76 | 1883 | AioContext *aio_context; |
8732901e | 1884 | int ret; |
6d4a2b3a | 1885 | |
3b1dbd11 BC |
1886 | bs = bdrv_lookup_bs(has_device ? device : NULL, |
1887 | has_node_name ? node_name : NULL, | |
1888 | &local_err); | |
84d18f06 | 1889 | if (local_err) { |
3b1dbd11 BC |
1890 | error_propagate(errp, local_err); |
1891 | return; | |
1892 | } | |
1893 | ||
927e0e76 SH |
1894 | aio_context = bdrv_get_aio_context(bs); |
1895 | aio_context_acquire(aio_context); | |
1896 | ||
3b1dbd11 BC |
1897 | if (!bdrv_is_first_non_filter(bs)) { |
1898 | error_set(errp, QERR_FEATURE_DISABLED, "resize"); | |
927e0e76 | 1899 | goto out; |
6d4a2b3a CH |
1900 | } |
1901 | ||
1902 | if (size < 0) { | |
939a1cc3 | 1903 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
927e0e76 | 1904 | goto out; |
6d4a2b3a CH |
1905 | } |
1906 | ||
9c75e168 JC |
1907 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { |
1908 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
927e0e76 | 1909 | goto out; |
9c75e168 JC |
1910 | } |
1911 | ||
92b7a08d PL |
1912 | /* complete all in-flight operations before resizing the device */ |
1913 | bdrv_drain_all(); | |
1914 | ||
8732901e KW |
1915 | ret = bdrv_truncate(bs, size); |
1916 | switch (ret) { | |
939a1cc3 SH |
1917 | case 0: |
1918 | break; | |
1919 | case -ENOMEDIUM: | |
1920 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1921 | break; | |
1922 | case -ENOTSUP: | |
1923 | error_set(errp, QERR_UNSUPPORTED); | |
1924 | break; | |
1925 | case -EACCES: | |
1926 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1927 | break; | |
1928 | case -EBUSY: | |
1929 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1930 | break; | |
1931 | default: | |
8732901e | 1932 | error_setg_errno(errp, -ret, "Could not resize"); |
939a1cc3 | 1933 | break; |
6d4a2b3a | 1934 | } |
927e0e76 SH |
1935 | |
1936 | out: | |
1937 | aio_context_release(aio_context); | |
6d4a2b3a | 1938 | } |
12bd451f | 1939 | |
9abf2dba | 1940 | static void block_job_cb(void *opaque, int ret) |
12bd451f SH |
1941 | { |
1942 | BlockDriverState *bs = opaque; | |
bcada37b | 1943 | const char *msg = NULL; |
12bd451f | 1944 | |
9abf2dba | 1945 | trace_block_job_cb(bs, bs->job, ret); |
12bd451f SH |
1946 | |
1947 | assert(bs->job); | |
bcada37b | 1948 | |
12bd451f | 1949 | if (ret < 0) { |
bcada37b | 1950 | msg = strerror(-ret); |
12bd451f SH |
1951 | } |
1952 | ||
370521a1 | 1953 | if (block_job_is_cancelled(bs->job)) { |
bcada37b | 1954 | block_job_event_cancelled(bs->job); |
370521a1 | 1955 | } else { |
bcada37b | 1956 | block_job_event_completed(bs->job, msg); |
370521a1 | 1957 | } |
aa398a5c | 1958 | |
fa510ebf | 1959 | bdrv_put_ref_bh_schedule(bs); |
12bd451f SH |
1960 | } |
1961 | ||
13d8cc51 JC |
1962 | void qmp_block_stream(const char *device, |
1963 | bool has_base, const char *base, | |
1964 | bool has_backing_file, const char *backing_file, | |
1965 | bool has_speed, int64_t speed, | |
1d809098 PB |
1966 | bool has_on_error, BlockdevOnError on_error, |
1967 | Error **errp) | |
12bd451f SH |
1968 | { |
1969 | BlockDriverState *bs; | |
c8c3080f | 1970 | BlockDriverState *base_bs = NULL; |
fd7f8c65 | 1971 | Error *local_err = NULL; |
13d8cc51 | 1972 | const char *base_name = NULL; |
12bd451f | 1973 | |
1d809098 PB |
1974 | if (!has_on_error) { |
1975 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
1976 | } | |
1977 | ||
12bd451f SH |
1978 | bs = bdrv_find(device); |
1979 | if (!bs) { | |
1980 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1981 | return; | |
1982 | } | |
1983 | ||
628ff683 FZ |
1984 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) { |
1985 | return; | |
1986 | } | |
1987 | ||
13d8cc51 | 1988 | if (has_base) { |
c8c3080f MT |
1989 | base_bs = bdrv_find_backing_image(bs, base); |
1990 | if (base_bs == NULL) { | |
1991 | error_set(errp, QERR_BASE_NOT_FOUND, base); | |
1992 | return; | |
1993 | } | |
13d8cc51 | 1994 | base_name = base; |
12bd451f SH |
1995 | } |
1996 | ||
13d8cc51 JC |
1997 | /* if we are streaming the entire chain, the result will have no backing |
1998 | * file, and specifying one is therefore an error */ | |
1999 | if (base_bs == NULL && has_backing_file) { | |
2000 | error_setg(errp, "backing file specified, but streaming the " | |
2001 | "entire chain"); | |
2002 | return; | |
2003 | } | |
2004 | ||
2005 | /* backing_file string overrides base bs filename */ | |
2006 | base_name = has_backing_file ? backing_file : base_name; | |
2007 | ||
2008 | stream_start(bs, base_bs, base_name, has_speed ? speed : 0, | |
1d809098 | 2009 | on_error, block_job_cb, bs, &local_err); |
84d18f06 | 2010 | if (local_err) { |
fd7f8c65 SH |
2011 | error_propagate(errp, local_err); |
2012 | return; | |
12bd451f SH |
2013 | } |
2014 | ||
2015 | trace_qmp_block_stream(bs, bs->job); | |
2016 | } | |
2d47c6e9 | 2017 | |
ed61fc10 | 2018 | void qmp_block_commit(const char *device, |
7676e2c5 JC |
2019 | bool has_base, const char *base, |
2020 | bool has_top, const char *top, | |
54e26900 | 2021 | bool has_backing_file, const char *backing_file, |
ed61fc10 JC |
2022 | bool has_speed, int64_t speed, |
2023 | Error **errp) | |
2024 | { | |
2025 | BlockDriverState *bs; | |
2026 | BlockDriverState *base_bs, *top_bs; | |
2027 | Error *local_err = NULL; | |
2028 | /* This will be part of the QMP command, if/when the | |
2029 | * BlockdevOnError change for blkmirror makes it in | |
2030 | */ | |
92aa5c6d | 2031 | BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
ed61fc10 | 2032 | |
54504663 HR |
2033 | if (!has_speed) { |
2034 | speed = 0; | |
2035 | } | |
2036 | ||
ed61fc10 JC |
2037 | /* drain all i/o before commits */ |
2038 | bdrv_drain_all(); | |
2039 | ||
7676e2c5 JC |
2040 | /* Important Note: |
2041 | * libvirt relies on the DeviceNotFound error class in order to probe for | |
2042 | * live commit feature versions; for this to work, we must make sure to | |
2043 | * perform the device lookup before any generic errors that may occur in a | |
2044 | * scenario in which all optional arguments are omitted. */ | |
ed61fc10 JC |
2045 | bs = bdrv_find(device); |
2046 | if (!bs) { | |
2047 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
2048 | return; | |
628ff683 FZ |
2049 | } |
2050 | ||
2051 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT, errp)) { | |
2052 | return; | |
ed61fc10 | 2053 | } |
ed61fc10 JC |
2054 | |
2055 | /* default top_bs is the active layer */ | |
2056 | top_bs = bs; | |
2057 | ||
7676e2c5 | 2058 | if (has_top && top) { |
ed61fc10 JC |
2059 | if (strcmp(bs->filename, top) != 0) { |
2060 | top_bs = bdrv_find_backing_image(bs, top); | |
2061 | } | |
2062 | } | |
2063 | ||
2064 | if (top_bs == NULL) { | |
2065 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
2066 | return; | |
2067 | } | |
2068 | ||
d5208c45 JC |
2069 | if (has_base && base) { |
2070 | base_bs = bdrv_find_backing_image(top_bs, base); | |
2071 | } else { | |
2072 | base_bs = bdrv_find_base(top_bs); | |
2073 | } | |
2074 | ||
2075 | if (base_bs == NULL) { | |
2076 | error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); | |
2077 | return; | |
2078 | } | |
2079 | ||
7676e2c5 JC |
2080 | /* Do not allow attempts to commit an image into itself */ |
2081 | if (top_bs == base_bs) { | |
2082 | error_setg(errp, "cannot commit an image into itself"); | |
2083 | return; | |
2084 | } | |
2085 | ||
20a63d2c | 2086 | if (top_bs == bs) { |
54e26900 JC |
2087 | if (has_backing_file) { |
2088 | error_setg(errp, "'backing-file' specified," | |
2089 | " but 'top' is the active layer"); | |
2090 | return; | |
2091 | } | |
20a63d2c FZ |
2092 | commit_active_start(bs, base_bs, speed, on_error, block_job_cb, |
2093 | bs, &local_err); | |
2094 | } else { | |
2095 | commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, | |
54e26900 | 2096 | has_backing_file ? backing_file : NULL, &local_err); |
20a63d2c | 2097 | } |
ed61fc10 JC |
2098 | if (local_err != NULL) { |
2099 | error_propagate(errp, local_err); | |
2100 | return; | |
2101 | } | |
ed61fc10 JC |
2102 | } |
2103 | ||
99a9addf SH |
2104 | void qmp_drive_backup(const char *device, const char *target, |
2105 | bool has_format, const char *format, | |
b53169ea | 2106 | enum MirrorSyncMode sync, |
99a9addf SH |
2107 | bool has_mode, enum NewImageMode mode, |
2108 | bool has_speed, int64_t speed, | |
2109 | bool has_on_source_error, BlockdevOnError on_source_error, | |
2110 | bool has_on_target_error, BlockdevOnError on_target_error, | |
2111 | Error **errp) | |
2112 | { | |
2113 | BlockDriverState *bs; | |
2114 | BlockDriverState *target_bs; | |
fc5d3f84 | 2115 | BlockDriverState *source = NULL; |
99a9addf SH |
2116 | BlockDriver *drv = NULL; |
2117 | Error *local_err = NULL; | |
2118 | int flags; | |
2119 | int64_t size; | |
2120 | int ret; | |
2121 | ||
2122 | if (!has_speed) { | |
2123 | speed = 0; | |
2124 | } | |
2125 | if (!has_on_source_error) { | |
2126 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2127 | } | |
2128 | if (!has_on_target_error) { | |
2129 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2130 | } | |
2131 | if (!has_mode) { | |
2132 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
2133 | } | |
2134 | ||
2135 | bs = bdrv_find(device); | |
2136 | if (!bs) { | |
2137 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
2138 | return; | |
2139 | } | |
2140 | ||
2141 | if (!bdrv_is_inserted(bs)) { | |
2142 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
2143 | return; | |
2144 | } | |
2145 | ||
2146 | if (!has_format) { | |
2147 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
2148 | } | |
2149 | if (format) { | |
2150 | drv = bdrv_find_format(format); | |
2151 | if (!drv) { | |
2152 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
2153 | return; | |
2154 | } | |
2155 | } | |
2156 | ||
3718d8ab | 2157 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { |
99a9addf SH |
2158 | return; |
2159 | } | |
2160 | ||
2161 | flags = bs->open_flags | BDRV_O_RDWR; | |
2162 | ||
fc5d3f84 IM |
2163 | /* See if we have a backing HD we can use to create our new image |
2164 | * on top of. */ | |
2165 | if (sync == MIRROR_SYNC_MODE_TOP) { | |
2166 | source = bs->backing_hd; | |
2167 | if (!source) { | |
2168 | sync = MIRROR_SYNC_MODE_FULL; | |
2169 | } | |
2170 | } | |
2171 | if (sync == MIRROR_SYNC_MODE_NONE) { | |
2172 | source = bs; | |
2173 | } | |
2174 | ||
99a9addf SH |
2175 | size = bdrv_getlength(bs); |
2176 | if (size < 0) { | |
2177 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2178 | return; | |
2179 | } | |
2180 | ||
2181 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
2182 | assert(format && drv); | |
fc5d3f84 IM |
2183 | if (source) { |
2184 | bdrv_img_create(target, format, source->filename, | |
2185 | source->drv->format_name, NULL, | |
2186 | size, flags, &local_err, false); | |
2187 | } else { | |
2188 | bdrv_img_create(target, format, NULL, NULL, NULL, | |
2189 | size, flags, &local_err, false); | |
2190 | } | |
99a9addf SH |
2191 | } |
2192 | ||
84d18f06 | 2193 | if (local_err) { |
99a9addf SH |
2194 | error_propagate(errp, local_err); |
2195 | return; | |
2196 | } | |
2197 | ||
f67503e5 | 2198 | target_bs = NULL; |
ddf5636d | 2199 | ret = bdrv_open(&target_bs, target, NULL, NULL, flags, drv, &local_err); |
99a9addf | 2200 | if (ret < 0) { |
34b5d2c6 | 2201 | error_propagate(errp, local_err); |
99a9addf SH |
2202 | return; |
2203 | } | |
2204 | ||
fc5d3f84 | 2205 | backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error, |
99a9addf SH |
2206 | block_job_cb, bs, &local_err); |
2207 | if (local_err != NULL) { | |
4f6fd349 | 2208 | bdrv_unref(target_bs); |
99a9addf SH |
2209 | error_propagate(errp, local_err); |
2210 | return; | |
2211 | } | |
99a9addf SH |
2212 | } |
2213 | ||
c13163fb BC |
2214 | BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp) |
2215 | { | |
2216 | return bdrv_named_nodes_list(); | |
2217 | } | |
2218 | ||
08e4ed6c PB |
2219 | #define DEFAULT_MIRROR_BUF_SIZE (10 << 20) |
2220 | ||
d9b902db PB |
2221 | void qmp_drive_mirror(const char *device, const char *target, |
2222 | bool has_format, const char *format, | |
4c828dc6 | 2223 | bool has_node_name, const char *node_name, |
09158f00 | 2224 | bool has_replaces, const char *replaces, |
d9b902db PB |
2225 | enum MirrorSyncMode sync, |
2226 | bool has_mode, enum NewImageMode mode, | |
b952b558 | 2227 | bool has_speed, int64_t speed, |
eee13dfe | 2228 | bool has_granularity, uint32_t granularity, |
08e4ed6c | 2229 | bool has_buf_size, int64_t buf_size, |
b952b558 PB |
2230 | bool has_on_source_error, BlockdevOnError on_source_error, |
2231 | bool has_on_target_error, BlockdevOnError on_target_error, | |
2232 | Error **errp) | |
d9b902db | 2233 | { |
d9b902db PB |
2234 | BlockDriverState *bs; |
2235 | BlockDriverState *source, *target_bs; | |
d9b902db PB |
2236 | BlockDriver *drv = NULL; |
2237 | Error *local_err = NULL; | |
4c828dc6 | 2238 | QDict *options = NULL; |
d9b902db | 2239 | int flags; |
ac3c5d83 | 2240 | int64_t size; |
d9b902db PB |
2241 | int ret; |
2242 | ||
2243 | if (!has_speed) { | |
2244 | speed = 0; | |
2245 | } | |
b952b558 PB |
2246 | if (!has_on_source_error) { |
2247 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2248 | } | |
2249 | if (!has_on_target_error) { | |
2250 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2251 | } | |
d9b902db PB |
2252 | if (!has_mode) { |
2253 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
2254 | } | |
eee13dfe PB |
2255 | if (!has_granularity) { |
2256 | granularity = 0; | |
2257 | } | |
08e4ed6c PB |
2258 | if (!has_buf_size) { |
2259 | buf_size = DEFAULT_MIRROR_BUF_SIZE; | |
2260 | } | |
2261 | ||
eee13dfe | 2262 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
3cbbe9fd SH |
2263 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", |
2264 | "a value in range [512B, 64MB]"); | |
eee13dfe PB |
2265 | return; |
2266 | } | |
2267 | if (granularity & (granularity - 1)) { | |
3cbbe9fd | 2268 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", "power of 2"); |
eee13dfe PB |
2269 | return; |
2270 | } | |
d9b902db PB |
2271 | |
2272 | bs = bdrv_find(device); | |
2273 | if (!bs) { | |
2274 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
2275 | return; | |
2276 | } | |
2277 | ||
2278 | if (!bdrv_is_inserted(bs)) { | |
2279 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
2280 | return; | |
2281 | } | |
2282 | ||
2283 | if (!has_format) { | |
2284 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
2285 | } | |
2286 | if (format) { | |
2287 | drv = bdrv_find_format(format); | |
2288 | if (!drv) { | |
2289 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
2290 | return; | |
2291 | } | |
2292 | } | |
2293 | ||
3718d8ab | 2294 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) { |
d9b902db PB |
2295 | return; |
2296 | } | |
2297 | ||
2298 | flags = bs->open_flags | BDRV_O_RDWR; | |
2299 | source = bs->backing_hd; | |
2300 | if (!source && sync == MIRROR_SYNC_MODE_TOP) { | |
2301 | sync = MIRROR_SYNC_MODE_FULL; | |
2302 | } | |
117e0c82 HR |
2303 | if (sync == MIRROR_SYNC_MODE_NONE) { |
2304 | source = bs; | |
2305 | } | |
d9b902db | 2306 | |
ac3c5d83 SH |
2307 | size = bdrv_getlength(bs); |
2308 | if (size < 0) { | |
2309 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2310 | return; | |
2311 | } | |
2312 | ||
09158f00 BC |
2313 | if (has_replaces) { |
2314 | BlockDriverState *to_replace_bs; | |
2315 | ||
2316 | if (!has_node_name) { | |
2317 | error_setg(errp, "a node-name must be provided when replacing a" | |
2318 | " named node of the graph"); | |
2319 | return; | |
2320 | } | |
2321 | ||
2322 | to_replace_bs = check_to_replace_node(replaces, &local_err); | |
2323 | ||
2324 | if (!to_replace_bs) { | |
2325 | error_propagate(errp, local_err); | |
2326 | return; | |
2327 | } | |
2328 | ||
2329 | if (size != bdrv_getlength(to_replace_bs)) { | |
2330 | error_setg(errp, "cannot replace image with a mirror image of " | |
2331 | "different size"); | |
2332 | return; | |
2333 | } | |
2334 | } | |
2335 | ||
14526864 HR |
2336 | if ((sync == MIRROR_SYNC_MODE_FULL || !source) |
2337 | && mode != NEW_IMAGE_MODE_EXISTING) | |
2338 | { | |
d9b902db PB |
2339 | /* create new image w/o backing file */ |
2340 | assert(format && drv); | |
cf8f2426 | 2341 | bdrv_img_create(target, format, |
f382d43a | 2342 | NULL, NULL, NULL, size, flags, &local_err, false); |
d9b902db PB |
2343 | } else { |
2344 | switch (mode) { | |
2345 | case NEW_IMAGE_MODE_EXISTING: | |
d9b902db PB |
2346 | break; |
2347 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
2348 | /* create new image with backing file */ | |
cf8f2426 LC |
2349 | bdrv_img_create(target, format, |
2350 | source->filename, | |
2351 | source->drv->format_name, | |
f382d43a | 2352 | NULL, size, flags, &local_err, false); |
d9b902db PB |
2353 | break; |
2354 | default: | |
2355 | abort(); | |
2356 | } | |
2357 | } | |
2358 | ||
84d18f06 | 2359 | if (local_err) { |
cf8f2426 | 2360 | error_propagate(errp, local_err); |
d9b902db PB |
2361 | return; |
2362 | } | |
2363 | ||
4c828dc6 BC |
2364 | if (has_node_name) { |
2365 | options = qdict_new(); | |
2366 | qdict_put(options, "node-name", qstring_from_str(node_name)); | |
2367 | } | |
2368 | ||
b812f671 PB |
2369 | /* Mirroring takes care of copy-on-write using the source's backing |
2370 | * file. | |
2371 | */ | |
f67503e5 | 2372 | target_bs = NULL; |
4c828dc6 BC |
2373 | ret = bdrv_open(&target_bs, target, NULL, options, |
2374 | flags | BDRV_O_NO_BACKING, drv, &local_err); | |
d9b902db | 2375 | if (ret < 0) { |
34b5d2c6 | 2376 | error_propagate(errp, local_err); |
d9b902db PB |
2377 | return; |
2378 | } | |
2379 | ||
09158f00 BC |
2380 | /* pass the node name to replace to mirror start since it's loose coupling |
2381 | * and will allow to check whether the node still exist at mirror completion | |
2382 | */ | |
2383 | mirror_start(bs, target_bs, | |
2384 | has_replaces ? replaces : NULL, | |
2385 | speed, granularity, buf_size, sync, | |
eee13dfe | 2386 | on_source_error, on_target_error, |
b952b558 | 2387 | block_job_cb, bs, &local_err); |
d9b902db | 2388 | if (local_err != NULL) { |
4f6fd349 | 2389 | bdrv_unref(target_bs); |
d9b902db PB |
2390 | error_propagate(errp, local_err); |
2391 | return; | |
2392 | } | |
d9b902db PB |
2393 | } |
2394 | ||
2d47c6e9 SH |
2395 | static BlockJob *find_block_job(const char *device) |
2396 | { | |
2397 | BlockDriverState *bs; | |
2398 | ||
2399 | bs = bdrv_find(device); | |
2400 | if (!bs || !bs->job) { | |
2401 | return NULL; | |
2402 | } | |
2403 | return bs->job; | |
2404 | } | |
2405 | ||
882ec7ce | 2406 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
2d47c6e9 SH |
2407 | { |
2408 | BlockJob *job = find_block_job(device); | |
2409 | ||
2410 | if (!job) { | |
7ef15070 | 2411 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2d47c6e9 SH |
2412 | return; |
2413 | } | |
2414 | ||
882ec7ce | 2415 | block_job_set_speed(job, speed, errp); |
2d47c6e9 | 2416 | } |
370521a1 | 2417 | |
6e37fb81 PB |
2418 | void qmp_block_job_cancel(const char *device, |
2419 | bool has_force, bool force, Error **errp) | |
370521a1 SH |
2420 | { |
2421 | BlockJob *job = find_block_job(device); | |
2422 | ||
6e37fb81 PB |
2423 | if (!has_force) { |
2424 | force = false; | |
2425 | } | |
2426 | ||
370521a1 | 2427 | if (!job) { |
7ef15070 | 2428 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
370521a1 SH |
2429 | return; |
2430 | } | |
6e37fb81 | 2431 | if (job->paused && !force) { |
f231b88d CR |
2432 | error_setg(errp, "The block job for device '%s' is currently paused", |
2433 | device); | |
8acc72a4 PB |
2434 | return; |
2435 | } | |
370521a1 SH |
2436 | |
2437 | trace_qmp_block_job_cancel(job); | |
2438 | block_job_cancel(job); | |
2439 | } | |
fb5458cd | 2440 | |
6e37fb81 PB |
2441 | void qmp_block_job_pause(const char *device, Error **errp) |
2442 | { | |
2443 | BlockJob *job = find_block_job(device); | |
2444 | ||
2445 | if (!job) { | |
2446 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
2447 | return; | |
2448 | } | |
2449 | ||
2450 | trace_qmp_block_job_pause(job); | |
2451 | block_job_pause(job); | |
2452 | } | |
2453 | ||
2454 | void qmp_block_job_resume(const char *device, Error **errp) | |
2455 | { | |
2456 | BlockJob *job = find_block_job(device); | |
2457 | ||
2458 | if (!job) { | |
2459 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
2460 | return; | |
2461 | } | |
2462 | ||
2463 | trace_qmp_block_job_resume(job); | |
2464 | block_job_resume(job); | |
2465 | } | |
2466 | ||
aeae883b PB |
2467 | void qmp_block_job_complete(const char *device, Error **errp) |
2468 | { | |
2469 | BlockJob *job = find_block_job(device); | |
2470 | ||
2471 | if (!job) { | |
2472 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
2473 | return; | |
2474 | } | |
2475 | ||
2476 | trace_qmp_block_job_complete(job); | |
2477 | block_job_complete(job, errp); | |
2478 | } | |
2479 | ||
fa40e656 JC |
2480 | void qmp_change_backing_file(const char *device, |
2481 | const char *image_node_name, | |
2482 | const char *backing_file, | |
2483 | Error **errp) | |
2484 | { | |
2485 | BlockDriverState *bs = NULL; | |
2486 | BlockDriverState *image_bs = NULL; | |
2487 | Error *local_err = NULL; | |
2488 | bool ro; | |
2489 | int open_flags; | |
2490 | int ret; | |
2491 | ||
2492 | /* find the top layer BDS of the chain */ | |
2493 | bs = bdrv_find(device); | |
2494 | if (!bs) { | |
2495 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
2496 | return; | |
2497 | } | |
2498 | ||
2499 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); | |
2500 | if (local_err) { | |
2501 | error_propagate(errp, local_err); | |
2502 | return; | |
2503 | } | |
2504 | ||
2505 | if (!image_bs) { | |
2506 | error_setg(errp, "image file not found"); | |
2507 | return; | |
2508 | } | |
2509 | ||
2510 | if (bdrv_find_base(image_bs) == image_bs) { | |
2511 | error_setg(errp, "not allowing backing file change on an image " | |
2512 | "without a backing file"); | |
2513 | return; | |
2514 | } | |
2515 | ||
2516 | /* even though we are not necessarily operating on bs, we need it to | |
2517 | * determine if block ops are currently prohibited on the chain */ | |
2518 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { | |
2519 | return; | |
2520 | } | |
2521 | ||
2522 | /* final sanity check */ | |
2523 | if (!bdrv_chain_contains(bs, image_bs)) { | |
2524 | error_setg(errp, "'%s' and image file are not in the same chain", | |
2525 | device); | |
2526 | return; | |
2527 | } | |
2528 | ||
2529 | /* if not r/w, reopen to make r/w */ | |
2530 | open_flags = image_bs->open_flags; | |
2531 | ro = bdrv_is_read_only(image_bs); | |
2532 | ||
2533 | if (ro) { | |
2534 | bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err); | |
2535 | if (local_err) { | |
2536 | error_propagate(errp, local_err); | |
2537 | return; | |
2538 | } | |
2539 | } | |
2540 | ||
2541 | ret = bdrv_change_backing_file(image_bs, backing_file, | |
2542 | image_bs->drv ? image_bs->drv->format_name : ""); | |
2543 | ||
2544 | if (ret < 0) { | |
2545 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'", | |
2546 | backing_file); | |
2547 | /* don't exit here, so we can try to restore open flags if | |
2548 | * appropriate */ | |
2549 | } | |
2550 | ||
2551 | if (ro) { | |
2552 | bdrv_reopen(image_bs, open_flags, &local_err); | |
2553 | if (local_err) { | |
2554 | error_propagate(errp, local_err); /* will preserve prior errp */ | |
2555 | } | |
2556 | } | |
2557 | } | |
2558 | ||
d26c9a15 KW |
2559 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) |
2560 | { | |
2561 | QmpOutputVisitor *ov = qmp_output_visitor_new(); | |
18e46a03 | 2562 | BlockBackend *blk; |
d26c9a15 KW |
2563 | QObject *obj; |
2564 | QDict *qdict; | |
d26c9a15 KW |
2565 | Error *local_err = NULL; |
2566 | ||
2567 | /* Require an ID in the top level */ | |
2568 | if (!options->has_id) { | |
2569 | error_setg(errp, "Block device needs an ID"); | |
2570 | goto fail; | |
2571 | } | |
2572 | ||
60e19e06 | 2573 | /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with |
d26c9a15 | 2574 | * cache.direct=false instead of silently switching to aio=threads, except |
60e19e06 | 2575 | * when called from drive_new(). |
d26c9a15 KW |
2576 | * |
2577 | * For now, simply forbidding the combination for all drivers will do. */ | |
2578 | if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) { | |
c6e0bd9b KW |
2579 | bool direct = options->has_cache && |
2580 | options->cache->has_direct && | |
2581 | options->cache->direct; | |
2582 | if (!direct) { | |
d26c9a15 KW |
2583 | error_setg(errp, "aio=native requires cache.direct=true"); |
2584 | goto fail; | |
2585 | } | |
2586 | } | |
2587 | ||
2588 | visit_type_BlockdevOptions(qmp_output_get_visitor(ov), | |
2589 | &options, NULL, &local_err); | |
84d18f06 | 2590 | if (local_err) { |
d26c9a15 KW |
2591 | error_propagate(errp, local_err); |
2592 | goto fail; | |
2593 | } | |
2594 | ||
2595 | obj = qmp_output_get_qobject(ov); | |
2596 | qdict = qobject_to_qdict(obj); | |
2597 | ||
2598 | qdict_flatten(qdict); | |
2599 | ||
18e46a03 | 2600 | blk = blockdev_init(NULL, qdict, &local_err); |
84d18f06 | 2601 | if (local_err) { |
b681072d | 2602 | error_propagate(errp, local_err); |
d26c9a15 KW |
2603 | goto fail; |
2604 | } | |
2605 | ||
18e46a03 | 2606 | if (bdrv_key_required(blk_bs(blk))) { |
18e46a03 | 2607 | blk_unref(blk); |
8ae8e904 KW |
2608 | error_setg(errp, "blockdev-add doesn't support encrypted devices"); |
2609 | goto fail; | |
2610 | } | |
2611 | ||
d26c9a15 KW |
2612 | fail: |
2613 | qmp_output_visitor_cleanup(ov); | |
2614 | } | |
2615 | ||
fb5458cd SH |
2616 | static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
2617 | { | |
2618 | BlockJobInfoList **prev = opaque; | |
2619 | BlockJob *job = bs->job; | |
2620 | ||
2621 | if (job) { | |
30e628b7 PB |
2622 | BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); |
2623 | elem->value = block_job_query(bs->job); | |
fb5458cd SH |
2624 | (*prev)->next = elem; |
2625 | *prev = elem; | |
2626 | } | |
2627 | } | |
2628 | ||
2629 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
2630 | { | |
2631 | /* Dummy is a fake list element for holding the head pointer */ | |
2632 | BlockJobInfoList dummy = {}; | |
2633 | BlockJobInfoList *prev = &dummy; | |
2634 | bdrv_iterate(do_qmp_query_block_jobs_one, &prev); | |
2635 | return dummy.next; | |
2636 | } | |
4d454574 | 2637 | |
0006383e | 2638 | QemuOptsList qemu_common_drive_opts = { |
4d454574 | 2639 | .name = "drive", |
0006383e | 2640 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
4d454574 PB |
2641 | .desc = { |
2642 | { | |
4d454574 PB |
2643 | .name = "snapshot", |
2644 | .type = QEMU_OPT_BOOL, | |
2645 | .help = "enable/disable snapshot mode", | |
a9384aff PB |
2646 | },{ |
2647 | .name = "discard", | |
2648 | .type = QEMU_OPT_STRING, | |
2649 | .help = "discard operation (ignore/off, unmap/on)", | |
4d454574 | 2650 | },{ |
29c4e2b5 KW |
2651 | .name = "cache.writeback", |
2652 | .type = QEMU_OPT_BOOL, | |
2653 | .help = "enables writeback mode for any caches", | |
2654 | },{ | |
2655 | .name = "cache.direct", | |
2656 | .type = QEMU_OPT_BOOL, | |
2657 | .help = "enables use of O_DIRECT (bypass the host page cache)", | |
2658 | },{ | |
2659 | .name = "cache.no-flush", | |
2660 | .type = QEMU_OPT_BOOL, | |
2661 | .help = "ignore any flush requests for the device", | |
4d454574 PB |
2662 | },{ |
2663 | .name = "aio", | |
2664 | .type = QEMU_OPT_STRING, | |
2665 | .help = "host AIO implementation (threads, native)", | |
2666 | },{ | |
2667 | .name = "format", | |
2668 | .type = QEMU_OPT_STRING, | |
2669 | .help = "disk format (raw, qcow2, ...)", | |
4d454574 PB |
2670 | },{ |
2671 | .name = "rerror", | |
2672 | .type = QEMU_OPT_STRING, | |
2673 | .help = "read error action", | |
2674 | },{ | |
2675 | .name = "werror", | |
2676 | .type = QEMU_OPT_STRING, | |
2677 | .help = "write error action", | |
4d454574 | 2678 | },{ |
0f227a94 | 2679 | .name = "read-only", |
4d454574 PB |
2680 | .type = QEMU_OPT_BOOL, |
2681 | .help = "open drive file as read-only", | |
2682 | },{ | |
57975222 | 2683 | .name = "throttling.iops-total", |
4d454574 PB |
2684 | .type = QEMU_OPT_NUMBER, |
2685 | .help = "limit total I/O operations per second", | |
2686 | },{ | |
57975222 | 2687 | .name = "throttling.iops-read", |
4d454574 PB |
2688 | .type = QEMU_OPT_NUMBER, |
2689 | .help = "limit read operations per second", | |
2690 | },{ | |
57975222 | 2691 | .name = "throttling.iops-write", |
4d454574 PB |
2692 | .type = QEMU_OPT_NUMBER, |
2693 | .help = "limit write operations per second", | |
2694 | },{ | |
57975222 | 2695 | .name = "throttling.bps-total", |
4d454574 PB |
2696 | .type = QEMU_OPT_NUMBER, |
2697 | .help = "limit total bytes per second", | |
2698 | },{ | |
57975222 | 2699 | .name = "throttling.bps-read", |
4d454574 PB |
2700 | .type = QEMU_OPT_NUMBER, |
2701 | .help = "limit read bytes per second", | |
2702 | },{ | |
57975222 | 2703 | .name = "throttling.bps-write", |
4d454574 PB |
2704 | .type = QEMU_OPT_NUMBER, |
2705 | .help = "limit write bytes per second", | |
3e9fab69 BC |
2706 | },{ |
2707 | .name = "throttling.iops-total-max", | |
2708 | .type = QEMU_OPT_NUMBER, | |
2709 | .help = "I/O operations burst", | |
2710 | },{ | |
2711 | .name = "throttling.iops-read-max", | |
2712 | .type = QEMU_OPT_NUMBER, | |
2713 | .help = "I/O operations read burst", | |
2714 | },{ | |
2715 | .name = "throttling.iops-write-max", | |
2716 | .type = QEMU_OPT_NUMBER, | |
2717 | .help = "I/O operations write burst", | |
2718 | },{ | |
2719 | .name = "throttling.bps-total-max", | |
2720 | .type = QEMU_OPT_NUMBER, | |
2721 | .help = "total bytes burst", | |
2722 | },{ | |
2723 | .name = "throttling.bps-read-max", | |
2724 | .type = QEMU_OPT_NUMBER, | |
2725 | .help = "total bytes read burst", | |
2726 | },{ | |
2727 | .name = "throttling.bps-write-max", | |
2728 | .type = QEMU_OPT_NUMBER, | |
2729 | .help = "total bytes write burst", | |
2024c1df BC |
2730 | },{ |
2731 | .name = "throttling.iops-size", | |
2732 | .type = QEMU_OPT_NUMBER, | |
2733 | .help = "when limiting by iops max size of an I/O in bytes", | |
4d454574 PB |
2734 | },{ |
2735 | .name = "copy-on-read", | |
2736 | .type = QEMU_OPT_BOOL, | |
2737 | .help = "copy read data from backing file into image file", | |
465bee1d PL |
2738 | },{ |
2739 | .name = "detect-zeroes", | |
2740 | .type = QEMU_OPT_STRING, | |
2741 | .help = "try to optimize zero writes (off, on, unmap)", | |
4d454574 PB |
2742 | }, |
2743 | { /* end of list */ } | |
2744 | }, | |
2745 | }; | |
0006383e KW |
2746 | |
2747 | QemuOptsList qemu_drive_opts = { | |
2748 | .name = "drive", | |
2749 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
2750 | .desc = { | |
492fdc6f KW |
2751 | /* |
2752 | * no elements => accept any params | |
2753 | * validation will happen later | |
2754 | */ | |
0006383e KW |
2755 | { /* end of list */ } |
2756 | }, | |
2757 | }; |