]>
Commit | Line | Data |
---|---|---|
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 | ||
d38ea87a | 33 | #include "qemu/osdep.h" |
26f54e9a | 34 | #include "sysemu/block-backend.h" |
9c17d615 | 35 | #include "sysemu/blockdev.h" |
0d09e41a | 36 | #include "hw/block/block.h" |
737e150e | 37 | #include "block/blockjob.h" |
609f45ea | 38 | #include "block/qdict.h" |
76f4afb4 | 39 | #include "block/throttle-groups.h" |
83c9089e | 40 | #include "monitor/monitor.h" |
d49b6836 | 41 | #include "qemu/error-report.h" |
1de7afc9 | 42 | #include "qemu/option.h" |
cdcd4361 | 43 | #include "qemu/qemu-print.h" |
1de7afc9 | 44 | #include "qemu/config-file.h" |
9af23989 MA |
45 | #include "qapi/qapi-commands-block.h" |
46 | #include "qapi/qapi-commands-transaction.h" | |
47 | #include "qapi/qapi-visit-block-core.h" | |
452fcdbc | 48 | #include "qapi/qmp/qdict.h" |
15280c36 | 49 | #include "qapi/qmp/qnum.h" |
6b673957 | 50 | #include "qapi/qmp/qstring.h" |
e688df6b | 51 | #include "qapi/error.h" |
cc7a8ea7 | 52 | #include "qapi/qmp/qerror.h" |
47e6b297 | 53 | #include "qapi/qmp/qlist.h" |
b3db211f | 54 | #include "qapi/qobject-output-visitor.h" |
9c17d615 | 55 | #include "sysemu/sysemu.h" |
ca00bbb1 | 56 | #include "sysemu/iothread.h" |
737e150e | 57 | #include "block/block_int.h" |
0ab8ed18 | 58 | #include "block/trace.h" |
54d31236 | 59 | #include "sysemu/runstate.h" |
b39847a5 | 60 | #include "sysemu/replay.h" |
f348b6d1 VB |
61 | #include "qemu/cutils.h" |
62 | #include "qemu/help_option.h" | |
db725815 | 63 | #include "qemu/main-loop.h" |
a2a7862c | 64 | #include "qemu/throttle-options.h" |
666daa68 | 65 | |
ebc2752b | 66 | /* Protected by BQL */ |
89802d5a | 67 | QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states = |
9c4218e9 HR |
68 | QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states); |
69 | ||
89802d5a ML |
70 | void bdrv_set_monitor_owned(BlockDriverState *bs) |
71 | { | |
b4ad82aa | 72 | GLOBAL_STATE_CODE(); |
89802d5a ML |
73 | QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list); |
74 | } | |
75 | ||
1960966d MA |
76 | static const char *const if_name[IF_COUNT] = { |
77 | [IF_NONE] = "none", | |
78 | [IF_IDE] = "ide", | |
79 | [IF_SCSI] = "scsi", | |
80 | [IF_FLOPPY] = "floppy", | |
81 | [IF_PFLASH] = "pflash", | |
82 | [IF_MTD] = "mtd", | |
83 | [IF_SD] = "sd", | |
84 | [IF_VIRTIO] = "virtio", | |
85 | [IF_XEN] = "xen", | |
86 | }; | |
87 | ||
21dff8cf | 88 | static int if_max_devs[IF_COUNT] = { |
27d6bf40 MA |
89 | /* |
90 | * Do not change these numbers! They govern how drive option | |
91 | * index maps to unit and bus. That mapping is ABI. | |
92 | * | |
547cb157 | 93 | * All controllers used to implement if=T drives need to support |
27d6bf40 MA |
94 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. |
95 | * Otherwise, some index values map to "impossible" bus, unit | |
96 | * values. | |
97 | * | |
98 | * For instance, if you change [IF_SCSI] to 255, -drive | |
99 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
100 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
101 | * the drive can't be set up. Regression. | |
102 | */ | |
103 | [IF_IDE] = 2, | |
104 | [IF_SCSI] = 7, | |
1960966d MA |
105 | }; |
106 | ||
21dff8cf JS |
107 | /** |
108 | * Boards may call this to offer board-by-board overrides | |
109 | * of the default, global values. | |
110 | */ | |
111 | void override_max_devs(BlockInterfaceType type, int max_devs) | |
112 | { | |
18e46a03 | 113 | BlockBackend *blk; |
21dff8cf JS |
114 | DriveInfo *dinfo; |
115 | ||
c5be7445 EGE |
116 | GLOBAL_STATE_CODE(); |
117 | ||
21dff8cf JS |
118 | if (max_devs <= 0) { |
119 | return; | |
120 | } | |
121 | ||
18e46a03 MA |
122 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
123 | dinfo = blk_legacy_dinfo(blk); | |
21dff8cf JS |
124 | if (dinfo->type == type) { |
125 | fprintf(stderr, "Cannot override units-per-bus property of" | |
126 | " the %s interface, because a drive of that type has" | |
127 | " already been added.\n", if_name[type]); | |
128 | g_assert_not_reached(); | |
129 | } | |
130 | } | |
131 | ||
132 | if_max_devs[type] = max_devs; | |
133 | } | |
134 | ||
14bafc54 MA |
135 | /* |
136 | * We automatically delete the drive when a device using it gets | |
137 | * unplugged. Questionable feature, but we can't just drop it. | |
138 | * Device models call blockdev_mark_auto_del() to schedule the | |
139 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
140 | * when deletion is actually safe. | |
141 | */ | |
4be74634 | 142 | void blockdev_mark_auto_del(BlockBackend *blk) |
14bafc54 | 143 | { |
18e46a03 | 144 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
8164102f | 145 | BlockJob *job; |
14bafc54 | 146 | |
c5be7445 EGE |
147 | GLOBAL_STATE_CODE(); |
148 | ||
26f8b3a8 | 149 | if (!dinfo) { |
2d246f01 KW |
150 | return; |
151 | } | |
152 | ||
8164102f VSO |
153 | for (job = block_job_next(NULL); job; job = block_job_next(job)) { |
154 | if (block_job_has_bdrv(job, blk_bs(blk))) { | |
155 | AioContext *aio_context = job->job.aio_context; | |
156 | aio_context_acquire(aio_context); | |
91fddb0d | 157 | |
8164102f | 158 | job_cancel(&job->job, false); |
91fddb0d | 159 | |
8164102f VSO |
160 | aio_context_release(aio_context); |
161 | } | |
5433c24f | 162 | } |
91fddb0d | 163 | |
26f8b3a8 | 164 | dinfo->auto_del = 1; |
14bafc54 MA |
165 | } |
166 | ||
4be74634 | 167 | void blockdev_auto_del(BlockBackend *blk) |
14bafc54 | 168 | { |
18e46a03 | 169 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
c5be7445 | 170 | GLOBAL_STATE_CODE(); |
14bafc54 | 171 | |
0fc0f1fa | 172 | if (dinfo && dinfo->auto_del) { |
efaa7c4e | 173 | monitor_remove_blk(blk); |
b9fe8a7a | 174 | blk_unref(blk); |
14bafc54 MA |
175 | } |
176 | } | |
177 | ||
505a7fb1 MA |
178 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
179 | { | |
180 | int max_devs = if_max_devs[type]; | |
181 | return max_devs ? index / max_devs : 0; | |
182 | } | |
183 | ||
184 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
185 | { | |
186 | int max_devs = if_max_devs[type]; | |
187 | return max_devs ? index % max_devs : index; | |
188 | } | |
189 | ||
2292ddae | 190 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
5645b0f4 | 191 | const char *optstr) |
666daa68 | 192 | { |
666daa68 MA |
193 | QemuOpts *opts; |
194 | ||
c5be7445 EGE |
195 | GLOBAL_STATE_CODE(); |
196 | ||
cc67f28e | 197 | opts = qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false); |
666daa68 MA |
198 | if (!opts) { |
199 | return NULL; | |
200 | } | |
2292ddae | 201 | if (type != IF_DEFAULT) { |
f43e47db | 202 | qemu_opt_set(opts, "if", if_name[type], &error_abort); |
2292ddae MA |
203 | } |
204 | if (index >= 0) { | |
a8b18f8f | 205 | qemu_opt_set_number(opts, "index", index, &error_abort); |
2292ddae | 206 | } |
666daa68 | 207 | if (file) |
f43e47db | 208 | qemu_opt_set(opts, "file", file, &error_abort); |
666daa68 MA |
209 | return opts; |
210 | } | |
211 | ||
212 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
213 | { | |
18e46a03 | 214 | BlockBackend *blk; |
666daa68 MA |
215 | DriveInfo *dinfo; |
216 | ||
c5be7445 EGE |
217 | GLOBAL_STATE_CODE(); |
218 | ||
18e46a03 MA |
219 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
220 | dinfo = blk_legacy_dinfo(blk); | |
221 | if (dinfo && dinfo->type == type | |
222 | && dinfo->bus == bus && dinfo->unit == unit) { | |
666daa68 | 223 | return dinfo; |
18e46a03 | 224 | } |
666daa68 MA |
225 | } |
226 | ||
227 | return NULL; | |
228 | } | |
229 | ||
fe9f70a1 MA |
230 | /* |
231 | * Check board claimed all -drive that are meant to be claimed. | |
232 | * Fatal error if any remain unclaimed. | |
233 | */ | |
720b8dc0 | 234 | void drive_check_orphaned(void) |
a66c9dc7 | 235 | { |
18e46a03 | 236 | BlockBackend *blk; |
a66c9dc7 | 237 | DriveInfo *dinfo; |
664cc623 | 238 | Location loc; |
720b8dc0 | 239 | bool orphans = false; |
a66c9dc7 | 240 | |
c5be7445 EGE |
241 | GLOBAL_STATE_CODE(); |
242 | ||
18e46a03 MA |
243 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
244 | dinfo = blk_legacy_dinfo(blk); | |
fe9f70a1 MA |
245 | /* |
246 | * Ignore default drives, because we create certain default | |
247 | * drives unconditionally, then leave them unclaimed. Not the | |
248 | * users fault. | |
249 | * Ignore IF_VIRTIO, because it gets desugared into -device, | |
250 | * so we can leave failing to -device. | |
251 | * Ignore IF_NONE, because leaving unclaimed IF_NONE remains | |
252 | * available for device_add is a feature. | |
253 | */ | |
254 | if (dinfo->is_default || dinfo->type == IF_VIRTIO | |
255 | || dinfo->type == IF_NONE) { | |
a1b40bda MA |
256 | continue; |
257 | } | |
258 | if (!blk_get_attached_dev(blk)) { | |
664cc623 MA |
259 | loc_push_none(&loc); |
260 | qemu_opts_loc_restore(dinfo->opts); | |
720b8dc0 | 261 | error_report("machine type does not support" |
664cc623 MA |
262 | " if=%s,bus=%d,unit=%d", |
263 | if_name[dinfo->type], dinfo->bus, dinfo->unit); | |
264 | loc_pop(&loc); | |
720b8dc0 | 265 | orphans = true; |
a66c9dc7 JS |
266 | } |
267 | } | |
268 | ||
720b8dc0 MA |
269 | if (orphans) { |
270 | exit(1); | |
271 | } | |
a66c9dc7 JS |
272 | } |
273 | ||
f1bd51ac MA |
274 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
275 | { | |
c5be7445 | 276 | GLOBAL_STATE_CODE(); |
f1bd51ac MA |
277 | return drive_get(type, |
278 | drive_index_to_bus_id(type, index), | |
279 | drive_index_to_unit_id(type, index)); | |
280 | } | |
281 | ||
666daa68 MA |
282 | int drive_get_max_bus(BlockInterfaceType type) |
283 | { | |
284 | int max_bus; | |
18e46a03 | 285 | BlockBackend *blk; |
666daa68 MA |
286 | DriveInfo *dinfo; |
287 | ||
c5be7445 EGE |
288 | GLOBAL_STATE_CODE(); |
289 | ||
666daa68 | 290 | max_bus = -1; |
18e46a03 MA |
291 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
292 | dinfo = blk_legacy_dinfo(blk); | |
293 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { | |
666daa68 | 294 | max_bus = dinfo->bus; |
18e46a03 | 295 | } |
666daa68 MA |
296 | } |
297 | return max_bus; | |
298 | } | |
299 | ||
666daa68 MA |
300 | static void bdrv_format_print(void *opaque, const char *name) |
301 | { | |
cdcd4361 | 302 | qemu_printf(" %s", name); |
666daa68 MA |
303 | } |
304 | ||
aa398a5c SH |
305 | typedef struct { |
306 | QEMUBH *bh; | |
fa510ebf FZ |
307 | BlockDriverState *bs; |
308 | } BDRVPutRefBH; | |
aa398a5c | 309 | |
b681072d | 310 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) |
666daa68 MA |
311 | { |
312 | if (!strcmp(buf, "ignore")) { | |
92aa5c6d | 313 | return BLOCKDEV_ON_ERROR_IGNORE; |
666daa68 | 314 | } else if (!is_read && !strcmp(buf, "enospc")) { |
92aa5c6d | 315 | return BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 316 | } else if (!strcmp(buf, "stop")) { |
92aa5c6d | 317 | return BLOCKDEV_ON_ERROR_STOP; |
666daa68 | 318 | } else if (!strcmp(buf, "report")) { |
92aa5c6d | 319 | return BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 320 | } else { |
b681072d KW |
321 | error_setg(errp, "'%s' invalid %s error action", |
322 | buf, is_read ? "read" : "write"); | |
666daa68 MA |
323 | return -1; |
324 | } | |
325 | } | |
326 | ||
40119eff AG |
327 | static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals, |
328 | Error **errp) | |
329 | { | |
330 | const QListEntry *entry; | |
331 | for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) { | |
332 | switch (qobject_type(entry->value)) { | |
333 | ||
334 | case QTYPE_QSTRING: { | |
335 | unsigned long long length; | |
7dc847eb HR |
336 | const char *str = qstring_get_str(qobject_to(QString, |
337 | entry->value)); | |
40119eff AG |
338 | if (parse_uint_full(str, &length, 10) == 0 && |
339 | length > 0 && length <= UINT_MAX) { | |
340 | block_acct_add_interval(stats, (unsigned) length); | |
341 | } else { | |
342 | error_setg(errp, "Invalid interval length: %s", str); | |
343 | return false; | |
344 | } | |
345 | break; | |
346 | } | |
347 | ||
01b2ffce | 348 | case QTYPE_QNUM: { |
7dc847eb | 349 | int64_t length = qnum_get_int(qobject_to(QNum, entry->value)); |
01b2ffce | 350 | |
40119eff AG |
351 | if (length > 0 && length <= UINT_MAX) { |
352 | block_acct_add_interval(stats, (unsigned) length); | |
353 | } else { | |
354 | error_setg(errp, "Invalid interval length: %" PRId64, length); | |
355 | return false; | |
356 | } | |
357 | break; | |
358 | } | |
359 | ||
360 | default: | |
361 | error_setg(errp, "The specification of stats-intervals is invalid"); | |
362 | return false; | |
363 | } | |
364 | } | |
365 | return true; | |
366 | } | |
367 | ||
33cb7dc8 KW |
368 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; |
369 | ||
fbf8175e HR |
370 | /* All parameters but @opts are optional and may be set to NULL. */ |
371 | static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, | |
372 | const char **throttling_group, ThrottleConfig *throttle_cfg, | |
373 | BlockdevDetectZeroesOptions *detect_zeroes, Error **errp) | |
374 | { | |
fbf8175e HR |
375 | Error *local_error = NULL; |
376 | const char *aio; | |
377 | ||
378 | if (bdrv_flags) { | |
fbf8175e HR |
379 | if (qemu_opt_get_bool(opts, "copy-on-read", false)) { |
380 | *bdrv_flags |= BDRV_O_COPY_ON_READ; | |
381 | } | |
382 | ||
fbf8175e | 383 | if ((aio = qemu_opt_get(opts, "aio")) != NULL) { |
f80f2673 AM |
384 | if (bdrv_parse_aio(aio, bdrv_flags) < 0) { |
385 | error_setg(errp, "invalid aio option"); | |
386 | return; | |
fbf8175e HR |
387 | } |
388 | } | |
389 | } | |
390 | ||
391 | /* disk I/O throttling */ | |
392 | if (throttling_group) { | |
393 | *throttling_group = qemu_opt_get(opts, "throttling.group"); | |
394 | } | |
395 | ||
396 | if (throttle_cfg) { | |
1588ab5d | 397 | throttle_config_init(throttle_cfg); |
fbf8175e HR |
398 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg = |
399 | qemu_opt_get_number(opts, "throttling.bps-total", 0); | |
400 | throttle_cfg->buckets[THROTTLE_BPS_READ].avg = | |
401 | qemu_opt_get_number(opts, "throttling.bps-read", 0); | |
402 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg = | |
403 | qemu_opt_get_number(opts, "throttling.bps-write", 0); | |
404 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg = | |
405 | qemu_opt_get_number(opts, "throttling.iops-total", 0); | |
406 | throttle_cfg->buckets[THROTTLE_OPS_READ].avg = | |
407 | qemu_opt_get_number(opts, "throttling.iops-read", 0); | |
408 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg = | |
409 | qemu_opt_get_number(opts, "throttling.iops-write", 0); | |
410 | ||
411 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max = | |
412 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
413 | throttle_cfg->buckets[THROTTLE_BPS_READ].max = | |
414 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
415 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].max = | |
416 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
417 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max = | |
418 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
419 | throttle_cfg->buckets[THROTTLE_OPS_READ].max = | |
420 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
421 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].max = | |
422 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
423 | ||
8a0fc18d AG |
424 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length = |
425 | qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1); | |
426 | throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length = | |
427 | qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1); | |
428 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length = | |
429 | qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1); | |
430 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length = | |
431 | qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1); | |
432 | throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length = | |
433 | qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1); | |
434 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length = | |
435 | qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1); | |
436 | ||
fbf8175e HR |
437 | throttle_cfg->op_size = |
438 | qemu_opt_get_number(opts, "throttling.iops-size", 0); | |
439 | ||
d5851089 | 440 | if (!throttle_is_valid(throttle_cfg, errp)) { |
fbf8175e HR |
441 | return; |
442 | } | |
443 | } | |
444 | ||
445 | if (detect_zeroes) { | |
446 | *detect_zeroes = | |
f7abe0ec | 447 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, |
fbf8175e | 448 | qemu_opt_get(opts, "detect-zeroes"), |
fbf8175e HR |
449 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
450 | &local_error); | |
451 | if (local_error) { | |
452 | error_propagate(errp, local_error); | |
453 | return; | |
454 | } | |
fbf8175e HR |
455 | } |
456 | } | |
457 | ||
b2aaf354 DL |
458 | static OnOffAuto account_get_opt(QemuOpts *opts, const char *name) |
459 | { | |
460 | if (!qemu_opt_find(opts, name)) { | |
461 | return ON_OFF_AUTO_AUTO; | |
462 | } | |
463 | if (qemu_opt_get_bool(opts, name, true)) { | |
464 | return ON_OFF_AUTO_ON; | |
465 | } | |
466 | return ON_OFF_AUTO_OFF; | |
467 | } | |
468 | ||
f298d071 | 469 | /* Takes the ownership of bs_opts */ |
18e46a03 MA |
470 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, |
471 | Error **errp) | |
666daa68 MA |
472 | { |
473 | const char *buf; | |
666daa68 MA |
474 | int bdrv_flags = 0; |
475 | int on_read_error, on_write_error; | |
b2aaf354 | 476 | OnOffAuto account_invalid, account_failed; |
f87a0e29 | 477 | bool writethrough, read_only; |
26f54e9a | 478 | BlockBackend *blk; |
a0f1eab1 | 479 | BlockDriverState *bs; |
cc0681c4 | 480 | ThrottleConfig cfg; |
666daa68 | 481 | int snapshot = 0; |
c546194f | 482 | Error *error = NULL; |
0006383e | 483 | QemuOpts *opts; |
40119eff AG |
484 | QDict *interval_dict = NULL; |
485 | QList *interval_list = NULL; | |
0006383e | 486 | const char *id; |
fbf8175e HR |
487 | BlockdevDetectZeroesOptions detect_zeroes = |
488 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; | |
489 | const char *throttling_group = NULL; | |
666daa68 | 490 | |
f298d071 KW |
491 | /* Check common options by copying from bs_opts to opts, all other options |
492 | * stay in bs_opts for processing by bdrv_open(). */ | |
493 | id = qdict_get_try_str(bs_opts, "id"); | |
c6ecec43 MA |
494 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, errp); |
495 | if (!opts) { | |
6376f952 | 496 | goto err_no_opts; |
0006383e KW |
497 | } |
498 | ||
668f62ec | 499 | if (!qemu_opts_absorb_qdict(opts, bs_opts, errp)) { |
ec9c10d2 | 500 | goto early_err; |
0006383e KW |
501 | } |
502 | ||
503 | if (id) { | |
504 | qdict_del(bs_opts, "id"); | |
505 | } | |
506 | ||
666daa68 | 507 | /* extract parameters */ |
666daa68 | 508 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
666daa68 | 509 | |
b2aaf354 DL |
510 | account_invalid = account_get_opt(opts, "stats-account-invalid"); |
511 | account_failed = account_get_opt(opts, "stats-account-failed"); | |
362e9299 | 512 | |
e4b24b49 KW |
513 | writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true); |
514 | ||
ff356ee4 AG |
515 | id = qemu_opts_id(opts); |
516 | ||
40119eff AG |
517 | qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals."); |
518 | qdict_array_split(interval_dict, &interval_list); | |
519 | ||
520 | if (qdict_size(interval_dict) != 0) { | |
521 | error_setg(errp, "Invalid option stats-intervals.%s", | |
522 | qdict_first(interval_dict)->key); | |
523 | goto early_err; | |
524 | } | |
2be5506f | 525 | |
fbf8175e HR |
526 | extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg, |
527 | &detect_zeroes, &error); | |
528 | if (error) { | |
529 | error_propagate(errp, error); | |
530 | goto early_err; | |
666daa68 | 531 | } |
666daa68 MA |
532 | |
533 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
c8057f95 | 534 | if (is_help_option(buf)) { |
cdcd4361 | 535 | qemu_printf("Supported formats:"); |
9ac404c5 | 536 | bdrv_iterate_format(bdrv_format_print, NULL, false); |
cdcd4361 | 537 | qemu_printf("\nSupported formats (read-only):"); |
9ac404c5 | 538 | bdrv_iterate_format(bdrv_format_print, NULL, true); |
cdcd4361 | 539 | qemu_printf("\n"); |
ec9c10d2 | 540 | goto early_err; |
666daa68 | 541 | } |
74fe54f2 | 542 | |
e4342ce5 HR |
543 | if (qdict_haskey(bs_opts, "driver")) { |
544 | error_setg(errp, "Cannot specify both 'driver' and 'format'"); | |
ec9c10d2 | 545 | goto early_err; |
6db5f5d6 | 546 | } |
46f5ac20 | 547 | qdict_put_str(bs_opts, "driver", buf); |
666daa68 MA |
548 | } |
549 | ||
92aa5c6d | 550 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 551 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
b681072d | 552 | on_write_error = parse_block_error_action(buf, 0, &error); |
84d18f06 | 553 | if (error) { |
b681072d | 554 | error_propagate(errp, error); |
ec9c10d2 | 555 | goto early_err; |
666daa68 MA |
556 | } |
557 | } | |
558 | ||
92aa5c6d | 559 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 560 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
b681072d | 561 | on_read_error = parse_block_error_action(buf, 1, &error); |
84d18f06 | 562 | if (error) { |
b681072d | 563 | error_propagate(errp, error); |
ec9c10d2 | 564 | goto early_err; |
666daa68 MA |
565 | } |
566 | } | |
567 | ||
5ec18f8c | 568 | if (snapshot) { |
91a097e7 | 569 | bdrv_flags |= BDRV_O_SNAPSHOT; |
5ec18f8c HR |
570 | } |
571 | ||
f87a0e29 AG |
572 | read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false); |
573 | ||
326642bc | 574 | /* init */ |
39c4ae94 | 575 | if ((!file || !*file) && !qdict_size(bs_opts)) { |
5ec18f8c HR |
576 | BlockBackendRootState *blk_rs; |
577 | ||
d861ab3a | 578 | blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); |
5ec18f8c | 579 | blk_rs = blk_get_root_state(blk); |
260242a8 | 580 | blk_rs->open_flags = bdrv_flags | (read_only ? 0 : BDRV_O_RDWR); |
5ec18f8c HR |
581 | blk_rs->detect_zeroes = detect_zeroes; |
582 | ||
cb3e7f08 | 583 | qobject_unref(bs_opts); |
e4342ce5 HR |
584 | } else { |
585 | if (file && !*file) { | |
c2ad1b0c | 586 | file = NULL; |
c2ad1b0c | 587 | } |
666daa68 | 588 | |
91a097e7 KW |
589 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
590 | * with other callers) rather than what we want as the real defaults. | |
591 | * Apply the defaults here instead. */ | |
91a097e7 KW |
592 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); |
593 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
f87a0e29 AG |
594 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, |
595 | read_only ? "on" : "off"); | |
9384a444 | 596 | qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on"); |
72e775c7 | 597 | assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0); |
91a097e7 | 598 | |
12d5ee3a KW |
599 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
600 | bdrv_flags |= BDRV_O_INACTIVE; | |
601 | } | |
602 | ||
efaa7c4e | 603 | blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp); |
e4342ce5 HR |
604 | if (!blk) { |
605 | goto err_no_bs_opts; | |
606 | } | |
607 | bs = blk_bs(blk); | |
ed9d4205 | 608 | |
5ec18f8c | 609 | bs->detect_zeroes = detect_zeroes; |
666daa68 | 610 | |
9caa6f3d | 611 | block_acct_setup(blk_get_stats(blk), account_invalid, account_failed); |
2be5506f | 612 | |
40119eff AG |
613 | if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) { |
614 | blk_unref(blk); | |
615 | blk = NULL; | |
616 | goto err_no_bs_opts; | |
2be5506f | 617 | } |
666daa68 MA |
618 | } |
619 | ||
7ca7f0f6 KW |
620 | /* disk I/O throttling */ |
621 | if (throttle_enabled(&cfg)) { | |
622 | if (!throttling_group) { | |
ff356ee4 | 623 | throttling_group = id; |
7ca7f0f6 KW |
624 | } |
625 | blk_io_limits_enable(blk, throttling_group); | |
626 | blk_set_io_limits(blk, &cfg); | |
627 | } | |
628 | ||
e4b24b49 | 629 | blk_set_enable_write_cache(blk, !writethrough); |
5ec18f8c | 630 | blk_set_on_error(blk, on_read_error, on_write_error); |
0006383e | 631 | |
ff356ee4 | 632 | if (!monitor_add_blk(blk, id, errp)) { |
efaa7c4e HR |
633 | blk_unref(blk); |
634 | blk = NULL; | |
635 | goto err_no_bs_opts; | |
636 | } | |
637 | ||
e4342ce5 | 638 | err_no_bs_opts: |
0006383e | 639 | qemu_opts_del(opts); |
cb3e7f08 MAL |
640 | qobject_unref(interval_dict); |
641 | qobject_unref(interval_list); | |
18e46a03 | 642 | return blk; |
a9ae2bff | 643 | |
ec9c10d2 | 644 | early_err: |
ec9c10d2 | 645 | qemu_opts_del(opts); |
cb3e7f08 MAL |
646 | qobject_unref(interval_dict); |
647 | qobject_unref(interval_list); | |
6376f952 | 648 | err_no_opts: |
cb3e7f08 | 649 | qobject_unref(bs_opts); |
a9ae2bff | 650 | return NULL; |
666daa68 MA |
651 | } |
652 | ||
bd745e23 | 653 | /* Takes the ownership of bs_opts */ |
89802d5a | 654 | BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) |
bd745e23 | 655 | { |
bd745e23 HR |
656 | int bdrv_flags = 0; |
657 | ||
b4ad82aa | 658 | GLOBAL_STATE_CODE(); |
a81d6164 KW |
659 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
660 | * with other callers) rather than what we want as the real defaults. | |
661 | * Apply the defaults here instead. */ | |
a81d6164 KW |
662 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); |
663 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
f87a0e29 | 664 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off"); |
a81d6164 | 665 | |
12d5ee3a KW |
666 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
667 | bdrv_flags |= BDRV_O_INACTIVE; | |
668 | } | |
669 | ||
74e1ae7c | 670 | return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp); |
bd745e23 HR |
671 | } |
672 | ||
9c4218e9 HR |
673 | void blockdev_close_all_bdrv_states(void) |
674 | { | |
675 | BlockDriverState *bs, *next_bs; | |
676 | ||
b4ad82aa | 677 | GLOBAL_STATE_CODE(); |
9c4218e9 HR |
678 | QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) { |
679 | AioContext *ctx = bdrv_get_aio_context(bs); | |
680 | ||
681 | aio_context_acquire(ctx); | |
682 | bdrv_unref(bs); | |
683 | aio_context_release(ctx); | |
684 | } | |
685 | } | |
686 | ||
262b4e8f HR |
687 | /* Iterates over the list of monitor-owned BlockDriverStates */ |
688 | BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs) | |
689 | { | |
f791bf7f | 690 | GLOBAL_STATE_CODE(); |
262b4e8f HR |
691 | return bs ? QTAILQ_NEXT(bs, monitor_list) |
692 | : QTAILQ_FIRST(&monitor_bdrv_states); | |
693 | } | |
694 | ||
c75d7f71 | 695 | static bool qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, |
5abbf0ee | 696 | Error **errp) |
57975222 KW |
697 | { |
698 | const char *value; | |
699 | ||
700 | value = qemu_opt_get(opts, from); | |
701 | if (value) { | |
5abbf0ee KW |
702 | if (qemu_opt_find(opts, to)) { |
703 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " | |
704 | "same time", to, from); | |
c75d7f71 | 705 | return false; |
5abbf0ee | 706 | } |
20d6cd47 JL |
707 | } |
708 | ||
709 | /* rename all items in opts */ | |
710 | while ((value = qemu_opt_get(opts, from))) { | |
f43e47db | 711 | qemu_opt_set(opts, to, value, &error_abort); |
57975222 KW |
712 | qemu_opt_unset(opts, from); |
713 | } | |
c75d7f71 | 714 | return true; |
57975222 KW |
715 | } |
716 | ||
33cb7dc8 KW |
717 | QemuOptsList qemu_legacy_drive_opts = { |
718 | .name = "drive", | |
719 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
720 | .desc = { | |
721 | { | |
87a899c5 KW |
722 | .name = "bus", |
723 | .type = QEMU_OPT_NUMBER, | |
724 | .help = "bus number", | |
725 | },{ | |
726 | .name = "unit", | |
727 | .type = QEMU_OPT_NUMBER, | |
728 | .help = "unit number (i.e. lun for scsi)", | |
729 | },{ | |
730 | .name = "index", | |
731 | .type = QEMU_OPT_NUMBER, | |
732 | .help = "index number", | |
733 | },{ | |
33cb7dc8 KW |
734 | .name = "media", |
735 | .type = QEMU_OPT_STRING, | |
736 | .help = "media type (disk, cdrom)", | |
593d464b KW |
737 | },{ |
738 | .name = "if", | |
739 | .type = QEMU_OPT_STRING, | |
740 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
d095b465 HR |
741 | },{ |
742 | .name = "file", | |
743 | .type = QEMU_OPT_STRING, | |
744 | .help = "file name", | |
33cb7dc8 | 745 | }, |
0ebd24e0 KW |
746 | |
747 | /* Options that are passed on, but have special semantics with -drive */ | |
748 | { | |
4e200cf8 | 749 | .name = BDRV_OPT_READ_ONLY, |
0ebd24e0 KW |
750 | .type = QEMU_OPT_BOOL, |
751 | .help = "open drive file as read-only", | |
ee13ed1c KW |
752 | },{ |
753 | .name = "rerror", | |
754 | .type = QEMU_OPT_STRING, | |
755 | .help = "read error action", | |
756 | },{ | |
757 | .name = "werror", | |
758 | .type = QEMU_OPT_STRING, | |
759 | .help = "write error action", | |
0ebd24e0 KW |
760 | },{ |
761 | .name = "copy-on-read", | |
762 | .type = QEMU_OPT_BOOL, | |
763 | .help = "copy read data from backing file into image file", | |
764 | }, | |
765 | ||
33cb7dc8 KW |
766 | { /* end of list */ } |
767 | }, | |
768 | }; | |
769 | ||
c4f26c9f MA |
770 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type, |
771 | Error **errp) | |
57975222 | 772 | { |
29c4e2b5 | 773 | const char *value; |
18e46a03 | 774 | BlockBackend *blk; |
33cb7dc8 | 775 | DriveInfo *dinfo = NULL; |
f298d071 | 776 | QDict *bs_opts; |
33cb7dc8 KW |
777 | QemuOpts *legacy_opts; |
778 | DriveMediaType media = MEDIA_DISK; | |
593d464b | 779 | BlockInterfaceType type; |
87a899c5 | 780 | int max_devs, bus_id, unit_id, index; |
ee13ed1c | 781 | const char *werror, *rerror; |
a7fdbcf0 FZ |
782 | bool read_only = false; |
783 | bool copy_on_read; | |
d095b465 | 784 | const char *filename; |
247147fb | 785 | int i; |
29c4e2b5 | 786 | |
c5be7445 EGE |
787 | GLOBAL_STATE_CODE(); |
788 | ||
57975222 | 789 | /* Change legacy command line options into QMP ones */ |
247147fb KW |
790 | static const struct { |
791 | const char *from; | |
792 | const char *to; | |
793 | } opt_renames[] = { | |
794 | { "iops", "throttling.iops-total" }, | |
795 | { "iops_rd", "throttling.iops-read" }, | |
796 | { "iops_wr", "throttling.iops-write" }, | |
57975222 | 797 | |
247147fb KW |
798 | { "bps", "throttling.bps-total" }, |
799 | { "bps_rd", "throttling.bps-read" }, | |
800 | { "bps_wr", "throttling.bps-write" }, | |
57975222 | 801 | |
247147fb KW |
802 | { "iops_max", "throttling.iops-total-max" }, |
803 | { "iops_rd_max", "throttling.iops-read-max" }, | |
804 | { "iops_wr_max", "throttling.iops-write-max" }, | |
3e9fab69 | 805 | |
247147fb KW |
806 | { "bps_max", "throttling.bps-total-max" }, |
807 | { "bps_rd_max", "throttling.bps-read-max" }, | |
808 | { "bps_wr_max", "throttling.bps-write-max" }, | |
3e9fab69 | 809 | |
247147fb | 810 | { "iops_size", "throttling.iops-size" }, |
2024c1df | 811 | |
76f4afb4 AG |
812 | { "group", "throttling.group" }, |
813 | ||
4e200cf8 | 814 | { "readonly", BDRV_OPT_READ_ONLY }, |
247147fb KW |
815 | }; |
816 | ||
817 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { | |
235e59cf | 818 | if (!qemu_opt_rename(all_opts, opt_renames[i].from, |
668f62ec | 819 | opt_renames[i].to, errp)) { |
5abbf0ee KW |
820 | return NULL; |
821 | } | |
247147fb | 822 | } |
0f227a94 | 823 | |
29c4e2b5 KW |
824 | value = qemu_opt_get(all_opts, "cache"); |
825 | if (value) { | |
826 | int flags = 0; | |
04feb4a5 | 827 | bool writethrough; |
29c4e2b5 | 828 | |
04feb4a5 | 829 | if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) { |
c4f26c9f | 830 | error_setg(errp, "invalid cache option"); |
29c4e2b5 KW |
831 | return NULL; |
832 | } | |
833 | ||
834 | /* Specific options take precedence */ | |
54861b92 KW |
835 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) { |
836 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB, | |
04feb4a5 | 837 | !writethrough, &error_abort); |
29c4e2b5 | 838 | } |
54861b92 KW |
839 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) { |
840 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT, | |
cccb7967 | 841 | !!(flags & BDRV_O_NOCACHE), &error_abort); |
29c4e2b5 | 842 | } |
54861b92 KW |
843 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) { |
844 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH, | |
cccb7967 | 845 | !!(flags & BDRV_O_NO_FLUSH), &error_abort); |
29c4e2b5 KW |
846 | } |
847 | qemu_opt_unset(all_opts, "cache"); | |
848 | } | |
849 | ||
f298d071 KW |
850 | /* Get a QDict for processing the options */ |
851 | bs_opts = qdict_new(); | |
852 | qemu_opts_to_qdict(all_opts, bs_opts); | |
853 | ||
87ea75d5 PC |
854 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, |
855 | &error_abort); | |
af175e85 | 856 | if (!qemu_opts_absorb_qdict(legacy_opts, bs_opts, errp)) { |
33cb7dc8 KW |
857 | goto fail; |
858 | } | |
859 | ||
860 | /* Media type */ | |
861 | value = qemu_opt_get(legacy_opts, "media"); | |
862 | if (value) { | |
863 | if (!strcmp(value, "disk")) { | |
864 | media = MEDIA_DISK; | |
865 | } else if (!strcmp(value, "cdrom")) { | |
866 | media = MEDIA_CDROM; | |
a7fdbcf0 | 867 | read_only = true; |
33cb7dc8 | 868 | } else { |
c4f26c9f | 869 | error_setg(errp, "'%s' invalid media", value); |
33cb7dc8 KW |
870 | goto fail; |
871 | } | |
872 | } | |
873 | ||
0ebd24e0 | 874 | /* copy-on-read is disabled with a warning for read-only devices */ |
4e200cf8 | 875 | read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false); |
0ebd24e0 KW |
876 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); |
877 | ||
878 | if (read_only && copy_on_read) { | |
3dc6f869 | 879 | warn_report("disabling copy-on-read on read-only drive"); |
0ebd24e0 KW |
880 | copy_on_read = false; |
881 | } | |
882 | ||
46f5ac20 EB |
883 | qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off"); |
884 | qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off"); | |
0ebd24e0 | 885 | |
593d464b KW |
886 | /* Controller type */ |
887 | value = qemu_opt_get(legacy_opts, "if"); | |
888 | if (value) { | |
889 | for (type = 0; | |
890 | type < IF_COUNT && strcmp(value, if_name[type]); | |
891 | type++) { | |
892 | } | |
893 | if (type == IF_COUNT) { | |
c4f26c9f | 894 | error_setg(errp, "unsupported bus type '%s'", value); |
593d464b KW |
895 | goto fail; |
896 | } | |
897 | } else { | |
898 | type = block_default_type; | |
899 | } | |
900 | ||
87a899c5 KW |
901 | /* Device address specified by bus/unit or index. |
902 | * If none was specified, try to find the first free one. */ | |
903 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
904 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
905 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
906 | ||
907 | max_devs = if_max_devs[type]; | |
908 | ||
909 | if (index != -1) { | |
910 | if (bus_id != 0 || unit_id != -1) { | |
c4f26c9f | 911 | error_setg(errp, "index cannot be used with bus and unit"); |
87a899c5 KW |
912 | goto fail; |
913 | } | |
914 | bus_id = drive_index_to_bus_id(type, index); | |
915 | unit_id = drive_index_to_unit_id(type, index); | |
916 | } | |
917 | ||
918 | if (unit_id == -1) { | |
919 | unit_id = 0; | |
920 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
921 | unit_id++; | |
922 | if (max_devs && unit_id >= max_devs) { | |
923 | unit_id -= max_devs; | |
924 | bus_id++; | |
925 | } | |
926 | } | |
927 | } | |
928 | ||
929 | if (max_devs && unit_id >= max_devs) { | |
c4f26c9f | 930 | error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1); |
87a899c5 KW |
931 | goto fail; |
932 | } | |
933 | ||
934 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
c4f26c9f MA |
935 | error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists", |
936 | bus_id, unit_id, index); | |
87a899c5 KW |
937 | goto fail; |
938 | } | |
939 | ||
940 | /* no id supplied -> create one */ | |
941 | if (qemu_opts_id(all_opts) == NULL) { | |
942 | char *new_id; | |
943 | const char *mediastr = ""; | |
944 | if (type == IF_IDE || type == IF_SCSI) { | |
945 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
946 | } | |
947 | if (max_devs) { | |
948 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
949 | mediastr, unit_id); | |
950 | } else { | |
951 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
952 | mediastr, unit_id); | |
953 | } | |
46f5ac20 | 954 | qdict_put_str(bs_opts, "id", new_id); |
87a899c5 KW |
955 | g_free(new_id); |
956 | } | |
957 | ||
394c7d4d | 958 | /* Add virtio block device */ |
394c7d4d KW |
959 | if (type == IF_VIRTIO) { |
960 | QemuOpts *devopts; | |
87ea75d5 PC |
961 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
962 | &error_abort); | |
9db1d3a2 | 963 | qemu_opt_set(devopts, "driver", "virtio-blk", &error_abort); |
f43e47db MA |
964 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"), |
965 | &error_abort); | |
394c7d4d KW |
966 | } |
967 | ||
d095b465 HR |
968 | filename = qemu_opt_get(legacy_opts, "file"); |
969 | ||
ee13ed1c KW |
970 | /* Check werror/rerror compatibility with if=... */ |
971 | werror = qemu_opt_get(legacy_opts, "werror"); | |
972 | if (werror != NULL) { | |
973 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
974 | type != IF_NONE) { | |
c4f26c9f | 975 | error_setg(errp, "werror is not supported by this bus type"); |
ee13ed1c KW |
976 | goto fail; |
977 | } | |
46f5ac20 | 978 | qdict_put_str(bs_opts, "werror", werror); |
ee13ed1c KW |
979 | } |
980 | ||
981 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
982 | if (rerror != NULL) { | |
983 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
984 | type != IF_NONE) { | |
c4f26c9f | 985 | error_setg(errp, "rerror is not supported by this bus type"); |
ee13ed1c KW |
986 | goto fail; |
987 | } | |
46f5ac20 | 988 | qdict_put_str(bs_opts, "rerror", rerror); |
ee13ed1c KW |
989 | } |
990 | ||
2d246f01 | 991 | /* Actual block device init: Functionality shared with blockdev-add */ |
992861fb | 992 | blk = blockdev_init(filename, bs_opts, errp); |
3cb0e25c | 993 | bs_opts = NULL; |
18e46a03 | 994 | if (!blk) { |
2d246f01 KW |
995 | goto fail; |
996 | } | |
997 | ||
26f8b3a8 MA |
998 | /* Create legacy DriveInfo */ |
999 | dinfo = g_malloc0(sizeof(*dinfo)); | |
f298d071 | 1000 | dinfo->opts = all_opts; |
2d246f01 | 1001 | |
ee13ed1c | 1002 | dinfo->type = type; |
87a899c5 KW |
1003 | dinfo->bus = bus_id; |
1004 | dinfo->unit = unit_id; | |
bcf83158 | 1005 | |
26f8b3a8 MA |
1006 | blk_set_legacy_dinfo(blk, dinfo); |
1007 | ||
e34ef046 KW |
1008 | switch(type) { |
1009 | case IF_IDE: | |
1010 | case IF_SCSI: | |
1011 | case IF_XEN: | |
1012 | case IF_NONE: | |
1013 | dinfo->media_cd = media == MEDIA_CDROM; | |
1014 | break; | |
1015 | default: | |
1016 | break; | |
1017 | } | |
1018 | ||
2d246f01 | 1019 | fail: |
33cb7dc8 | 1020 | qemu_opts_del(legacy_opts); |
cb3e7f08 | 1021 | qobject_unref(bs_opts); |
2d246f01 | 1022 | return dinfo; |
57975222 KW |
1023 | } |
1024 | ||
b6c1bae5 KW |
1025 | static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp) |
1026 | { | |
1027 | BlockDriverState *bs; | |
1028 | ||
1029 | bs = bdrv_lookup_bs(name, name, errp); | |
1030 | if (bs == NULL) { | |
1031 | return NULL; | |
1032 | } | |
1033 | ||
1034 | if (!bdrv_is_root_node(bs)) { | |
1035 | error_setg(errp, "Need a root block node"); | |
1036 | return NULL; | |
1037 | } | |
1038 | ||
1039 | if (!bdrv_is_inserted(bs)) { | |
1040 | error_setg(errp, "Device has no medium"); | |
1041 | return NULL; | |
1042 | } | |
1043 | ||
1044 | return bs; | |
1045 | } | |
1046 | ||
10f75907 | 1047 | static void blockdev_do_action(TransactionAction *action, Error **errp) |
6cc2a415 | 1048 | { |
c8a83e85 | 1049 | TransactionActionList list; |
6cc2a415 | 1050 | |
10f75907 | 1051 | list.value = action; |
6cc2a415 | 1052 | list.next = NULL; |
94d16a64 | 1053 | qmp_transaction(&list, false, NULL, errp); |
6cc2a415 PB |
1054 | } |
1055 | ||
0901f67e BC |
1056 | void qmp_blockdev_snapshot_sync(bool has_device, const char *device, |
1057 | bool has_node_name, const char *node_name, | |
1058 | const char *snapshot_file, | |
1059 | bool has_snapshot_node_name, | |
1060 | const char *snapshot_node_name, | |
6106e249 | 1061 | bool has_format, const char *format, |
0901f67e | 1062 | bool has_mode, NewImageMode mode, Error **errp) |
f8882568 | 1063 | { |
a911e6ae | 1064 | BlockdevSnapshotSync snapshot = { |
0901f67e | 1065 | .has_device = has_device, |
6cc2a415 | 1066 | .device = (char *) device, |
0901f67e BC |
1067 | .has_node_name = has_node_name, |
1068 | .node_name = (char *) node_name, | |
6cc2a415 | 1069 | .snapshot_file = (char *) snapshot_file, |
0901f67e BC |
1070 | .has_snapshot_node_name = has_snapshot_node_name, |
1071 | .snapshot_node_name = (char *) snapshot_node_name, | |
6cc2a415 PB |
1072 | .has_format = has_format, |
1073 | .format = (char *) format, | |
1074 | .has_mode = has_mode, | |
1075 | .mode = mode, | |
1076 | }; | |
10f75907 EB |
1077 | TransactionAction action = { |
1078 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, | |
32bafa8f | 1079 | .u.blockdev_snapshot_sync.data = &snapshot, |
10f75907 EB |
1080 | }; |
1081 | blockdev_do_action(&action, errp); | |
f8882568 JS |
1082 | } |
1083 | ||
43de7e2d AG |
1084 | void qmp_blockdev_snapshot(const char *node, const char *overlay, |
1085 | Error **errp) | |
1086 | { | |
1087 | BlockdevSnapshot snapshot_data = { | |
1088 | .node = (char *) node, | |
1089 | .overlay = (char *) overlay | |
1090 | }; | |
10f75907 EB |
1091 | TransactionAction action = { |
1092 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, | |
32bafa8f | 1093 | .u.blockdev_snapshot.data = &snapshot_data, |
10f75907 EB |
1094 | }; |
1095 | blockdev_do_action(&action, errp); | |
43de7e2d AG |
1096 | } |
1097 | ||
f323bc9e WX |
1098 | void qmp_blockdev_snapshot_internal_sync(const char *device, |
1099 | const char *name, | |
1100 | Error **errp) | |
1101 | { | |
1102 | BlockdevSnapshotInternal snapshot = { | |
1103 | .device = (char *) device, | |
1104 | .name = (char *) name | |
1105 | }; | |
10f75907 EB |
1106 | TransactionAction action = { |
1107 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
32bafa8f | 1108 | .u.blockdev_snapshot_internal_sync.data = &snapshot, |
10f75907 EB |
1109 | }; |
1110 | blockdev_do_action(&action, errp); | |
f323bc9e WX |
1111 | } |
1112 | ||
44e3e053 WX |
1113 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
1114 | bool has_id, | |
1115 | const char *id, | |
1116 | bool has_name, | |
1117 | const char *name, | |
1118 | Error **errp) | |
1119 | { | |
a0e8544c | 1120 | BlockDriverState *bs; |
4ef3982a | 1121 | AioContext *aio_context; |
44e3e053 WX |
1122 | QEMUSnapshotInfo sn; |
1123 | Error *local_err = NULL; | |
1124 | SnapshotInfo *info = NULL; | |
1125 | int ret; | |
1126 | ||
2dfb4c03 KW |
1127 | bs = qmp_get_root_bs(device, errp); |
1128 | if (!bs) { | |
44e3e053 WX |
1129 | return NULL; |
1130 | } | |
2dfb4c03 | 1131 | aio_context = bdrv_get_aio_context(bs); |
5433c24f | 1132 | aio_context_acquire(aio_context); |
44e3e053 WX |
1133 | |
1134 | if (!has_id) { | |
1135 | id = NULL; | |
1136 | } | |
1137 | ||
1138 | if (!has_name) { | |
1139 | name = NULL; | |
1140 | } | |
1141 | ||
1142 | if (!id && !name) { | |
1143 | error_setg(errp, "Name or id must be provided"); | |
5433c24f | 1144 | goto out_aio_context; |
44e3e053 WX |
1145 | } |
1146 | ||
0b928854 SH |
1147 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) { |
1148 | goto out_aio_context; | |
1149 | } | |
1150 | ||
44e3e053 | 1151 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); |
84d18f06 | 1152 | if (local_err) { |
44e3e053 | 1153 | error_propagate(errp, local_err); |
4ef3982a | 1154 | goto out_aio_context; |
44e3e053 WX |
1155 | } |
1156 | if (!ret) { | |
1157 | error_setg(errp, | |
1158 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1159 | "device '%s'", | |
1160 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
4ef3982a | 1161 | goto out_aio_context; |
44e3e053 WX |
1162 | } |
1163 | ||
1164 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
84d18f06 | 1165 | if (local_err) { |
44e3e053 | 1166 | error_propagate(errp, local_err); |
4ef3982a | 1167 | goto out_aio_context; |
44e3e053 WX |
1168 | } |
1169 | ||
4ef3982a SH |
1170 | aio_context_release(aio_context); |
1171 | ||
5839e53b | 1172 | info = g_new0(SnapshotInfo, 1); |
44e3e053 WX |
1173 | info->id = g_strdup(sn.id_str); |
1174 | info->name = g_strdup(sn.name); | |
1175 | info->date_nsec = sn.date_nsec; | |
1176 | info->date_sec = sn.date_sec; | |
1177 | info->vm_state_size = sn.vm_state_size; | |
1178 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1179 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
b39847a5 PD |
1180 | if (sn.icount != -1ULL) { |
1181 | info->icount = sn.icount; | |
1182 | info->has_icount = true; | |
1183 | } | |
44e3e053 WX |
1184 | |
1185 | return info; | |
4ef3982a SH |
1186 | |
1187 | out_aio_context: | |
1188 | aio_context_release(aio_context); | |
1189 | return NULL; | |
44e3e053 | 1190 | } |
8802d1fd | 1191 | |
b756b9ce | 1192 | /* New and old BlockDriverState structs for atomic group operations */ |
ba0c86a3 | 1193 | |
50f43f0f | 1194 | typedef struct BlkActionState BlkActionState; |
ba0c86a3 | 1195 | |
50f43f0f JS |
1196 | /** |
1197 | * BlkActionOps: | |
1198 | * Table of operations that define an Action. | |
1199 | * | |
1200 | * @instance_size: Size of state struct, in bytes. | |
1201 | * @prepare: Prepare the work, must NOT be NULL. | |
1202 | * @commit: Commit the changes, can be NULL. | |
1203 | * @abort: Abort the changes on fail, can be NULL. | |
1204 | * @clean: Clean up resources after all transaction actions have called | |
1205 | * commit() or abort(). Can be NULL. | |
1206 | * | |
1207 | * Only prepare() may fail. In a single transaction, only one of commit() or | |
1208 | * abort() will be called. clean() will always be called if it is present. | |
ebc2752b EGE |
1209 | * |
1210 | * Always run under BQL. | |
50f43f0f JS |
1211 | */ |
1212 | typedef struct BlkActionOps { | |
ba0c86a3 | 1213 | size_t instance_size; |
50f43f0f JS |
1214 | void (*prepare)(BlkActionState *common, Error **errp); |
1215 | void (*commit)(BlkActionState *common); | |
1216 | void (*abort)(BlkActionState *common); | |
1217 | void (*clean)(BlkActionState *common); | |
1218 | } BlkActionOps; | |
ba0c86a3 | 1219 | |
50f43f0f JS |
1220 | /** |
1221 | * BlkActionState: | |
1222 | * Describes one Action's state within a Transaction. | |
1223 | * | |
1224 | * @action: QAPI-defined enum identifying which Action to perform. | |
1225 | * @ops: Table of ActionOps this Action can perform. | |
94d16a64 | 1226 | * @block_job_txn: Transaction which this action belongs to. |
50f43f0f JS |
1227 | * @entry: List membership for all Actions in this Transaction. |
1228 | * | |
1229 | * This structure must be arranged as first member in a subclassed type, | |
1230 | * assuming that the compiler will also arrange it to the same offsets as the | |
1231 | * base class. | |
ba0c86a3 | 1232 | */ |
50f43f0f | 1233 | struct BlkActionState { |
c8a83e85 | 1234 | TransactionAction *action; |
50f43f0f | 1235 | const BlkActionOps *ops; |
62c9e416 | 1236 | JobTxn *block_job_txn; |
94d16a64 | 1237 | TransactionProperties *txn_props; |
f4de0f8c | 1238 | QTAILQ_ENTRY(BlkActionState) entry; |
ba0c86a3 WX |
1239 | }; |
1240 | ||
bbe86010 WX |
1241 | /* internal snapshot private data */ |
1242 | typedef struct InternalSnapshotState { | |
50f43f0f | 1243 | BlkActionState common; |
bbe86010 WX |
1244 | BlockDriverState *bs; |
1245 | QEMUSnapshotInfo sn; | |
507306cc | 1246 | bool created; |
bbe86010 WX |
1247 | } InternalSnapshotState; |
1248 | ||
94d16a64 JS |
1249 | |
1250 | static int action_check_completion_mode(BlkActionState *s, Error **errp) | |
1251 | { | |
1252 | if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
1253 | error_setg(errp, | |
1254 | "Action '%s' does not support Transaction property " | |
1255 | "completion-mode = %s", | |
977c736f MA |
1256 | TransactionActionKind_str(s->action->type), |
1257 | ActionCompletionMode_str(s->txn_props->completion_mode)); | |
94d16a64 JS |
1258 | return -1; |
1259 | } | |
1260 | return 0; | |
1261 | } | |
1262 | ||
50f43f0f | 1263 | static void internal_snapshot_prepare(BlkActionState *common, |
bbe86010 WX |
1264 | Error **errp) |
1265 | { | |
f70edf99 | 1266 | Error *local_err = NULL; |
bbe86010 WX |
1267 | const char *device; |
1268 | const char *name; | |
1269 | BlockDriverState *bs; | |
1270 | QEMUSnapshotInfo old_sn, *sn; | |
1271 | bool ret; | |
f793dde0 | 1272 | int64_t rt; |
bbe86010 WX |
1273 | BlockdevSnapshotInternal *internal; |
1274 | InternalSnapshotState *state; | |
a36e458c | 1275 | AioContext *aio_context; |
bbe86010 WX |
1276 | int ret1; |
1277 | ||
6a8f9661 | 1278 | g_assert(common->action->type == |
bbe86010 | 1279 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); |
32bafa8f | 1280 | internal = common->action->u.blockdev_snapshot_internal_sync.data; |
bbe86010 WX |
1281 | state = DO_UPCAST(InternalSnapshotState, common, common); |
1282 | ||
1283 | /* 1. parse input */ | |
1284 | device = internal->device; | |
1285 | name = internal->name; | |
1286 | ||
1287 | /* 2. check for validation */ | |
94d16a64 JS |
1288 | if (action_check_completion_mode(common, errp) < 0) { |
1289 | return; | |
1290 | } | |
1291 | ||
75dfd402 KW |
1292 | bs = qmp_get_root_bs(device, errp); |
1293 | if (!bs) { | |
bbe86010 WX |
1294 | return; |
1295 | } | |
1296 | ||
a36e458c SH |
1297 | aio_context = bdrv_get_aio_context(bs); |
1298 | aio_context_acquire(aio_context); | |
5d6e96ef | 1299 | |
507306cc | 1300 | state->bs = bs; |
a36e458c SH |
1301 | |
1302 | /* Paired with .clean() */ | |
507306cc FZ |
1303 | bdrv_drained_begin(bs); |
1304 | ||
3dc7ca3c | 1305 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) { |
a36e458c | 1306 | goto out; |
3dc7ca3c SH |
1307 | } |
1308 | ||
bbe86010 | 1309 | if (bdrv_is_read_only(bs)) { |
81e5f78a | 1310 | error_setg(errp, "Device '%s' is read only", device); |
a36e458c | 1311 | goto out; |
bbe86010 WX |
1312 | } |
1313 | ||
1314 | if (!bdrv_can_snapshot(bs)) { | |
81e5f78a AG |
1315 | error_setg(errp, "Block format '%s' used by device '%s' " |
1316 | "does not support internal snapshots", | |
1317 | bs->drv->format_name, device); | |
a36e458c | 1318 | goto out; |
bbe86010 WX |
1319 | } |
1320 | ||
1321 | if (!strlen(name)) { | |
1322 | error_setg(errp, "Name is empty"); | |
a36e458c | 1323 | goto out; |
bbe86010 WX |
1324 | } |
1325 | ||
1326 | /* check whether a snapshot with name exist */ | |
f70edf99 MA |
1327 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, |
1328 | &local_err); | |
1329 | if (local_err) { | |
1330 | error_propagate(errp, local_err); | |
a36e458c | 1331 | goto out; |
bbe86010 WX |
1332 | } else if (ret) { |
1333 | error_setg(errp, | |
1334 | "Snapshot with name '%s' already exists on device '%s'", | |
1335 | name, device); | |
a36e458c | 1336 | goto out; |
bbe86010 WX |
1337 | } |
1338 | ||
1339 | /* 3. take the snapshot */ | |
1340 | sn = &state->sn; | |
1341 | pstrcpy(sn->name, sizeof(sn->name), name); | |
f793dde0 MAL |
1342 | rt = g_get_real_time(); |
1343 | sn->date_sec = rt / G_USEC_PER_SEC; | |
1344 | sn->date_nsec = (rt % G_USEC_PER_SEC) * 1000; | |
bbe86010 | 1345 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
b39847a5 PD |
1346 | if (replay_mode != REPLAY_MODE_NONE) { |
1347 | sn->icount = replay_get_current_icount(); | |
1348 | } else { | |
1349 | sn->icount = -1ULL; | |
1350 | } | |
bbe86010 WX |
1351 | |
1352 | ret1 = bdrv_snapshot_create(bs, sn); | |
1353 | if (ret1 < 0) { | |
1354 | error_setg_errno(errp, -ret1, | |
1355 | "Failed to create snapshot '%s' on device '%s'", | |
1356 | name, device); | |
a36e458c | 1357 | goto out; |
bbe86010 WX |
1358 | } |
1359 | ||
1360 | /* 4. succeed, mark a snapshot is created */ | |
507306cc | 1361 | state->created = true; |
a36e458c SH |
1362 | |
1363 | out: | |
1364 | aio_context_release(aio_context); | |
bbe86010 WX |
1365 | } |
1366 | ||
50f43f0f | 1367 | static void internal_snapshot_abort(BlkActionState *common) |
bbe86010 WX |
1368 | { |
1369 | InternalSnapshotState *state = | |
1370 | DO_UPCAST(InternalSnapshotState, common, common); | |
1371 | BlockDriverState *bs = state->bs; | |
1372 | QEMUSnapshotInfo *sn = &state->sn; | |
a36e458c | 1373 | AioContext *aio_context; |
bbe86010 WX |
1374 | Error *local_error = NULL; |
1375 | ||
507306cc | 1376 | if (!state->created) { |
bbe86010 WX |
1377 | return; |
1378 | } | |
1379 | ||
a36e458c SH |
1380 | aio_context = bdrv_get_aio_context(state->bs); |
1381 | aio_context_acquire(aio_context); | |
1382 | ||
bbe86010 | 1383 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { |
c29b77f9 MA |
1384 | error_reportf_err(local_error, |
1385 | "Failed to delete snapshot with id '%s' and " | |
1386 | "name '%s' on device '%s' in abort: ", | |
1387 | sn->id_str, sn->name, | |
1388 | bdrv_get_device_name(bs)); | |
bbe86010 | 1389 | } |
a36e458c SH |
1390 | |
1391 | aio_context_release(aio_context); | |
bbe86010 WX |
1392 | } |
1393 | ||
50f43f0f | 1394 | static void internal_snapshot_clean(BlkActionState *common) |
5d6e96ef SH |
1395 | { |
1396 | InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState, | |
1397 | common, common); | |
a36e458c | 1398 | AioContext *aio_context; |
5d6e96ef | 1399 | |
a36e458c SH |
1400 | if (!state->bs) { |
1401 | return; | |
5d6e96ef | 1402 | } |
a36e458c SH |
1403 | |
1404 | aio_context = bdrv_get_aio_context(state->bs); | |
1405 | aio_context_acquire(aio_context); | |
1406 | ||
1407 | bdrv_drained_end(state->bs); | |
1408 | ||
1409 | aio_context_release(aio_context); | |
5d6e96ef SH |
1410 | } |
1411 | ||
ba0c86a3 | 1412 | /* external snapshot private data */ |
ba5d6ab6 | 1413 | typedef struct ExternalSnapshotState { |
50f43f0f | 1414 | BlkActionState common; |
8802d1fd JC |
1415 | BlockDriverState *old_bs; |
1416 | BlockDriverState *new_bs; | |
067acf28 | 1417 | bool overlay_appended; |
ba5d6ab6 | 1418 | } ExternalSnapshotState; |
8802d1fd | 1419 | |
50f43f0f | 1420 | static void external_snapshot_prepare(BlkActionState *common, |
9b9877ee WX |
1421 | Error **errp) |
1422 | { | |
934aee14 | 1423 | int ret; |
5b363937 | 1424 | int flags = 0; |
43de7e2d | 1425 | QDict *options = NULL; |
9b9877ee | 1426 | Error *local_err = NULL; |
43de7e2d | 1427 | /* Device and node name of the image to generate the snapshot from */ |
e2a31e87 | 1428 | const char *device; |
0901f67e | 1429 | const char *node_name; |
43de7e2d AG |
1430 | /* Reference to the new image (for 'blockdev-snapshot') */ |
1431 | const char *snapshot_ref; | |
1432 | /* File name of the new image (for 'blockdev-snapshot-sync') */ | |
e2a31e87 | 1433 | const char *new_image_file; |
ba5d6ab6 SH |
1434 | ExternalSnapshotState *state = |
1435 | DO_UPCAST(ExternalSnapshotState, common, common); | |
c8a83e85 | 1436 | TransactionAction *action = common->action; |
2d24b60b | 1437 | AioContext *aio_context; |
d29d3d1f | 1438 | uint64_t perm, shared; |
9b9877ee | 1439 | |
43de7e2d AG |
1440 | /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar |
1441 | * purpose but a different set of parameters */ | |
1442 | switch (action->type) { | |
1443 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: | |
1444 | { | |
32bafa8f | 1445 | BlockdevSnapshot *s = action->u.blockdev_snapshot.data; |
43de7e2d AG |
1446 | device = s->node; |
1447 | node_name = s->node; | |
1448 | new_image_file = NULL; | |
1449 | snapshot_ref = s->overlay; | |
1450 | } | |
1451 | break; | |
1452 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
1453 | { | |
32bafa8f | 1454 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
43de7e2d AG |
1455 | device = s->has_device ? s->device : NULL; |
1456 | node_name = s->has_node_name ? s->node_name : NULL; | |
1457 | new_image_file = s->snapshot_file; | |
1458 | snapshot_ref = NULL; | |
1459 | } | |
1460 | break; | |
1461 | default: | |
1462 | g_assert_not_reached(); | |
e2a31e87 WX |
1463 | } |
1464 | ||
1465 | /* start processing */ | |
94d16a64 JS |
1466 | if (action_check_completion_mode(common, errp) < 0) { |
1467 | return; | |
1468 | } | |
1469 | ||
43de7e2d AG |
1470 | state->old_bs = bdrv_lookup_bs(device, node_name, errp); |
1471 | if (!state->old_bs) { | |
9b9877ee WX |
1472 | return; |
1473 | } | |
1474 | ||
2d24b60b SH |
1475 | aio_context = bdrv_get_aio_context(state->old_bs); |
1476 | aio_context_acquire(aio_context); | |
1477 | ||
1478 | /* Paired with .clean() */ | |
da763e83 | 1479 | bdrv_drained_begin(state->old_bs); |
5d6e96ef | 1480 | |
ba5d6ab6 | 1481 | if (!bdrv_is_inserted(state->old_bs)) { |
c6bd8c70 | 1482 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
2d24b60b | 1483 | goto out; |
9b9877ee WX |
1484 | } |
1485 | ||
3718d8ab FZ |
1486 | if (bdrv_op_is_blocked(state->old_bs, |
1487 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
2d24b60b | 1488 | goto out; |
9b9877ee WX |
1489 | } |
1490 | ||
ba5d6ab6 SH |
1491 | if (!bdrv_is_read_only(state->old_bs)) { |
1492 | if (bdrv_flush(state->old_bs)) { | |
c6bd8c70 | 1493 | error_setg(errp, QERR_IO_ERROR); |
2d24b60b | 1494 | goto out; |
9b9877ee WX |
1495 | } |
1496 | } | |
1497 | ||
43de7e2d | 1498 | if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) { |
32bafa8f | 1499 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
43de7e2d AG |
1500 | const char *format = s->has_format ? s->format : "qcow2"; |
1501 | enum NewImageMode mode; | |
1502 | const char *snapshot_node_name = | |
1503 | s->has_snapshot_node_name ? s->snapshot_node_name : NULL; | |
9b9877ee | 1504 | |
43de7e2d | 1505 | if (node_name && !snapshot_node_name) { |
ef2e38a1 | 1506 | error_setg(errp, "New overlay node-name missing"); |
2d24b60b | 1507 | goto out; |
9b9877ee | 1508 | } |
9b9877ee | 1509 | |
43de7e2d AG |
1510 | if (snapshot_node_name && |
1511 | bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) { | |
ef2e38a1 | 1512 | error_setg(errp, "New overlay node-name already in use"); |
2d24b60b | 1513 | goto out; |
43de7e2d AG |
1514 | } |
1515 | ||
1516 | flags = state->old_bs->open_flags; | |
2a32c6e8 JS |
1517 | flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ); |
1518 | flags |= BDRV_O_NO_BACKING; | |
43de7e2d AG |
1519 | |
1520 | /* create new image w/backing file */ | |
1521 | mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1522 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
f86b8b58 KW |
1523 | int64_t size = bdrv_getlength(state->old_bs); |
1524 | if (size < 0) { | |
1525 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2d24b60b | 1526 | goto out; |
f86b8b58 | 1527 | } |
f30c66ba | 1528 | bdrv_refresh_filename(state->old_bs); |
43de7e2d AG |
1529 | bdrv_img_create(new_image_file, format, |
1530 | state->old_bs->filename, | |
1531 | state->old_bs->drv->format_name, | |
9217283d | 1532 | NULL, size, flags, false, &local_err); |
43de7e2d AG |
1533 | if (local_err) { |
1534 | error_propagate(errp, local_err); | |
2d24b60b | 1535 | goto out; |
43de7e2d AG |
1536 | } |
1537 | } | |
1538 | ||
1539 | options = qdict_new(); | |
d52e1a0e | 1540 | if (snapshot_node_name) { |
46f5ac20 | 1541 | qdict_put_str(options, "node-name", snapshot_node_name); |
43de7e2d | 1542 | } |
46f5ac20 | 1543 | qdict_put_str(options, "driver", format); |
0901f67e BC |
1544 | } |
1545 | ||
5b363937 HR |
1546 | state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags, |
1547 | errp); | |
f67503e5 | 1548 | /* We will manually add the backing_hd field to the bs later */ |
5b363937 | 1549 | if (!state->new_bs) { |
2d24b60b | 1550 | goto out; |
43de7e2d AG |
1551 | } |
1552 | ||
d29d3d1f KW |
1553 | /* |
1554 | * Allow attaching a backing file to an overlay that's already in use only | |
1555 | * if the parents don't assume that they are already seeing a valid image. | |
1556 | * (Specifically, allow it as a mirror target, which is write-only access.) | |
1557 | */ | |
1558 | bdrv_get_cumulative_perm(state->new_bs, &perm, &shared); | |
1559 | if (perm & BLK_PERM_CONSISTENT_READ) { | |
a2bb6f8c | 1560 | error_setg(errp, "The overlay is already in use"); |
2d24b60b | 1561 | goto out; |
43de7e2d AG |
1562 | } |
1563 | ||
7cc734a9 HR |
1564 | if (state->new_bs->drv->is_filter) { |
1565 | error_setg(errp, "Filters cannot be used as overlays"); | |
1566 | goto out; | |
1567 | } | |
1568 | ||
1569 | if (bdrv_cow_child(state->new_bs)) { | |
a2bb6f8c | 1570 | error_setg(errp, "The overlay already has a backing image"); |
2d24b60b | 1571 | goto out; |
08b24cfe AG |
1572 | } |
1573 | ||
1574 | if (!state->new_bs->drv->supports_backing) { | |
a2bb6f8c | 1575 | error_setg(errp, "The overlay does not support backing images"); |
2d24b60b | 1576 | goto out; |
b2c2832c KW |
1577 | } |
1578 | ||
934aee14 VSO |
1579 | ret = bdrv_append(state->new_bs, state->old_bs, errp); |
1580 | if (ret < 0) { | |
2d24b60b | 1581 | goto out; |
9b9877ee | 1582 | } |
067acf28 | 1583 | state->overlay_appended = true; |
2d24b60b SH |
1584 | |
1585 | out: | |
1586 | aio_context_release(aio_context); | |
9b9877ee WX |
1587 | } |
1588 | ||
50f43f0f | 1589 | static void external_snapshot_commit(BlkActionState *common) |
3b0047e8 | 1590 | { |
ba5d6ab6 SH |
1591 | ExternalSnapshotState *state = |
1592 | DO_UPCAST(ExternalSnapshotState, common, common); | |
2d24b60b SH |
1593 | AioContext *aio_context; |
1594 | ||
1595 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1596 | aio_context_acquire(aio_context); | |
ba0c86a3 | 1597 | |
3b0047e8 WX |
1598 | /* We don't need (or want) to use the transactional |
1599 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1600 | * don't want to abort all of them if one of them fails the reopen */ | |
d73415a3 | 1601 | if (!qatomic_read(&state->old_bs->copy_on_read)) { |
1b57774f | 1602 | bdrv_reopen_set_read_only(state->old_bs, true, NULL); |
4c844983 | 1603 | } |
2d24b60b SH |
1604 | |
1605 | aio_context_release(aio_context); | |
3b0047e8 WX |
1606 | } |
1607 | ||
50f43f0f | 1608 | static void external_snapshot_abort(BlkActionState *common) |
96b86bf7 | 1609 | { |
ba5d6ab6 SH |
1610 | ExternalSnapshotState *state = |
1611 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1612 | if (state->new_bs) { | |
067acf28 | 1613 | if (state->overlay_appended) { |
2d24b60b | 1614 | AioContext *aio_context; |
377410f6 SL |
1615 | AioContext *tmp_context; |
1616 | int ret; | |
2d24b60b SH |
1617 | |
1618 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1619 | aio_context_acquire(aio_context); | |
1620 | ||
719fc28c JC |
1621 | bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd() |
1622 | close state->old_bs; we need it */ | |
1623 | bdrv_set_backing_hd(state->new_bs, NULL, &error_abort); | |
377410f6 SL |
1624 | |
1625 | /* | |
1626 | * The call to bdrv_set_backing_hd() above returns state->old_bs to | |
1627 | * the main AioContext. As we're still going to be using it, return | |
1628 | * it to the AioContext it was before. | |
1629 | */ | |
1630 | tmp_context = bdrv_get_aio_context(state->old_bs); | |
1631 | if (aio_context != tmp_context) { | |
1632 | aio_context_release(aio_context); | |
1633 | aio_context_acquire(tmp_context); | |
1634 | ||
1635 | ret = bdrv_try_set_aio_context(state->old_bs, | |
1636 | aio_context, NULL); | |
1637 | assert(ret == 0); | |
1638 | ||
1639 | aio_context_release(tmp_context); | |
1640 | aio_context_acquire(aio_context); | |
1641 | } | |
1642 | ||
5fe31c25 | 1643 | bdrv_replace_node(state->new_bs, state->old_bs, &error_abort); |
719fc28c | 1644 | bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */ |
2d24b60b SH |
1645 | |
1646 | aio_context_release(aio_context); | |
b2c2832c | 1647 | } |
96b86bf7 | 1648 | } |
da763e83 FZ |
1649 | } |
1650 | ||
50f43f0f | 1651 | static void external_snapshot_clean(BlkActionState *common) |
da763e83 FZ |
1652 | { |
1653 | ExternalSnapshotState *state = | |
1654 | DO_UPCAST(ExternalSnapshotState, common, common); | |
2d24b60b SH |
1655 | AioContext *aio_context; |
1656 | ||
1657 | if (!state->old_bs) { | |
1658 | return; | |
5d6e96ef | 1659 | } |
2d24b60b SH |
1660 | |
1661 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1662 | aio_context_acquire(aio_context); | |
1663 | ||
1664 | bdrv_drained_end(state->old_bs); | |
1665 | bdrv_unref(state->new_bs); | |
1666 | ||
1667 | aio_context_release(aio_context); | |
96b86bf7 WX |
1668 | } |
1669 | ||
3037f364 | 1670 | typedef struct DriveBackupState { |
50f43f0f | 1671 | BlkActionState common; |
3037f364 SH |
1672 | BlockDriverState *bs; |
1673 | BlockJob *job; | |
1674 | } DriveBackupState; | |
1675 | ||
2288ccfa SL |
1676 | static BlockJob *do_backup_common(BackupCommon *backup, |
1677 | BlockDriverState *bs, | |
1678 | BlockDriverState *target_bs, | |
1679 | AioContext *aio_context, | |
1680 | JobTxn *txn, Error **errp); | |
78f51fde | 1681 | |
50f43f0f | 1682 | static void drive_backup_prepare(BlkActionState *common, Error **errp) |
3037f364 SH |
1683 | { |
1684 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1685 | DriveBackup *backup; | |
2288ccfa SL |
1686 | BlockDriverState *bs; |
1687 | BlockDriverState *target_bs; | |
1688 | BlockDriverState *source = NULL; | |
66d56054 | 1689 | AioContext *aio_context; |
3ea67e08 | 1690 | AioContext *old_context; |
2288ccfa | 1691 | QDict *options; |
3037f364 | 1692 | Error *local_err = NULL; |
2288ccfa SL |
1693 | int flags; |
1694 | int64_t size; | |
1695 | bool set_backing_hd = false; | |
3ea67e08 | 1696 | int ret; |
3037f364 | 1697 | |
6a8f9661 | 1698 | assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
32bafa8f | 1699 | backup = common->action->u.drive_backup.data; |
3037f364 | 1700 | |
2288ccfa SL |
1701 | if (!backup->has_mode) { |
1702 | backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1703 | } | |
1704 | ||
85c9d133 | 1705 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
b7e4fa22 | 1706 | if (!bs) { |
1fdd4b7b FZ |
1707 | return; |
1708 | } | |
1709 | ||
2288ccfa SL |
1710 | if (!bs->drv) { |
1711 | error_setg(errp, "Device has no medium"); | |
1712 | return; | |
1713 | } | |
1714 | ||
66d56054 SH |
1715 | aio_context = bdrv_get_aio_context(bs); |
1716 | aio_context_acquire(aio_context); | |
1717 | ||
2842ff2d | 1718 | state->bs = bs; |
66d56054 | 1719 | /* Paired with .clean() */ |
b7e4fa22 | 1720 | bdrv_drained_begin(bs); |
66d56054 | 1721 | |
2288ccfa SL |
1722 | if (!backup->has_format) { |
1723 | backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ? | |
1724 | NULL : (char *) bs->drv->format_name; | |
1725 | } | |
1726 | ||
1727 | /* Early check to avoid creating target */ | |
1728 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { | |
1729 | goto out; | |
1730 | } | |
1731 | ||
1732 | flags = bs->open_flags | BDRV_O_RDWR; | |
1733 | ||
1734 | /* | |
1735 | * See if we have a backing HD we can use to create our new image | |
1736 | * on top of. | |
1737 | */ | |
1738 | if (backup->sync == MIRROR_SYNC_MODE_TOP) { | |
2b088c60 HR |
1739 | /* |
1740 | * Backup will not replace the source by the target, so none | |
1741 | * of the filters skipped here will be removed (in contrast to | |
1742 | * mirror). Therefore, we can skip all of them when looking | |
1743 | * for the first COW relationship. | |
1744 | */ | |
1745 | source = bdrv_cow_bs(bdrv_skip_filters(bs)); | |
2288ccfa SL |
1746 | if (!source) { |
1747 | backup->sync = MIRROR_SYNC_MODE_FULL; | |
1748 | } | |
1749 | } | |
1750 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
1751 | source = bs; | |
1752 | flags |= BDRV_O_NO_BACKING; | |
1753 | set_backing_hd = true; | |
1754 | } | |
1755 | ||
1756 | size = bdrv_getlength(bs); | |
1757 | if (size < 0) { | |
1758 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1759 | goto out; | |
1760 | } | |
1761 | ||
1762 | if (backup->mode != NEW_IMAGE_MODE_EXISTING) { | |
1763 | assert(backup->format); | |
1764 | if (source) { | |
2b088c60 HR |
1765 | /* Implicit filters should not appear in the filename */ |
1766 | BlockDriverState *explicit_backing = | |
1767 | bdrv_skip_implicit_filters(source); | |
1768 | ||
1769 | bdrv_refresh_filename(explicit_backing); | |
1770 | bdrv_img_create(backup->target, backup->format, | |
1771 | explicit_backing->filename, | |
1772 | explicit_backing->drv->format_name, NULL, | |
2288ccfa SL |
1773 | size, flags, false, &local_err); |
1774 | } else { | |
1775 | bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL, | |
1776 | size, flags, false, &local_err); | |
1777 | } | |
1778 | } | |
5d6e96ef | 1779 | |
84d18f06 | 1780 | if (local_err) { |
3037f364 | 1781 | error_propagate(errp, local_err); |
66d56054 | 1782 | goto out; |
3037f364 | 1783 | } |
66d56054 | 1784 | |
2288ccfa SL |
1785 | options = qdict_new(); |
1786 | qdict_put_str(options, "discard", "unmap"); | |
1787 | qdict_put_str(options, "detect-zeroes", "unmap"); | |
1788 | if (backup->format) { | |
1789 | qdict_put_str(options, "driver", backup->format); | |
1790 | } | |
1791 | ||
1792 | target_bs = bdrv_open(backup->target, NULL, options, flags, errp); | |
1793 | if (!target_bs) { | |
1794 | goto out; | |
1795 | } | |
1796 | ||
3ea67e08 SL |
1797 | /* Honor bdrv_try_set_aio_context() context acquisition requirements. */ |
1798 | old_context = bdrv_get_aio_context(target_bs); | |
1799 | aio_context_release(aio_context); | |
1800 | aio_context_acquire(old_context); | |
1801 | ||
1802 | ret = bdrv_try_set_aio_context(target_bs, aio_context, errp); | |
1803 | if (ret < 0) { | |
1804 | bdrv_unref(target_bs); | |
1805 | aio_context_release(old_context); | |
1806 | return; | |
1807 | } | |
1808 | ||
1809 | aio_context_release(old_context); | |
1810 | aio_context_acquire(aio_context); | |
1811 | ||
2288ccfa | 1812 | if (set_backing_hd) { |
5a11a1ca | 1813 | if (bdrv_set_backing_hd(target_bs, source, errp) < 0) { |
2288ccfa SL |
1814 | goto unref; |
1815 | } | |
1816 | } | |
1817 | ||
2288ccfa SL |
1818 | state->job = do_backup_common(qapi_DriveBackup_base(backup), |
1819 | bs, target_bs, aio_context, | |
1820 | common->block_job_txn, errp); | |
1821 | ||
1822 | unref: | |
1823 | bdrv_unref(target_bs); | |
66d56054 SH |
1824 | out: |
1825 | aio_context_release(aio_context); | |
111049a4 | 1826 | } |
3037f364 | 1827 | |
111049a4 JS |
1828 | static void drive_backup_commit(BlkActionState *common) |
1829 | { | |
1830 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
66d56054 SH |
1831 | AioContext *aio_context; |
1832 | ||
1833 | aio_context = bdrv_get_aio_context(state->bs); | |
1834 | aio_context_acquire(aio_context); | |
1835 | ||
111049a4 | 1836 | assert(state->job); |
da01ff7f | 1837 | job_start(&state->job->job); |
66d56054 SH |
1838 | |
1839 | aio_context_release(aio_context); | |
3037f364 SH |
1840 | } |
1841 | ||
50f43f0f | 1842 | static void drive_backup_abort(BlkActionState *common) |
3037f364 SH |
1843 | { |
1844 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
3037f364 | 1845 | |
111049a4 | 1846 | if (state->job) { |
66d56054 SH |
1847 | AioContext *aio_context; |
1848 | ||
1849 | aio_context = bdrv_get_aio_context(state->bs); | |
1850 | aio_context_acquire(aio_context); | |
1851 | ||
4cfb3f05 | 1852 | job_cancel_sync(&state->job->job, true); |
66d56054 SH |
1853 | |
1854 | aio_context_release(aio_context); | |
3037f364 SH |
1855 | } |
1856 | } | |
1857 | ||
50f43f0f | 1858 | static void drive_backup_clean(BlkActionState *common) |
5d6e96ef SH |
1859 | { |
1860 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
66d56054 | 1861 | AioContext *aio_context; |
5d6e96ef | 1862 | |
66d56054 SH |
1863 | if (!state->bs) { |
1864 | return; | |
5d6e96ef | 1865 | } |
66d56054 SH |
1866 | |
1867 | aio_context = bdrv_get_aio_context(state->bs); | |
1868 | aio_context_acquire(aio_context); | |
1869 | ||
1870 | bdrv_drained_end(state->bs); | |
1871 | ||
1872 | aio_context_release(aio_context); | |
5d6e96ef SH |
1873 | } |
1874 | ||
bd8baecd | 1875 | typedef struct BlockdevBackupState { |
50f43f0f | 1876 | BlkActionState common; |
bd8baecd FZ |
1877 | BlockDriverState *bs; |
1878 | BlockJob *job; | |
bd8baecd FZ |
1879 | } BlockdevBackupState; |
1880 | ||
50f43f0f | 1881 | static void blockdev_backup_prepare(BlkActionState *common, Error **errp) |
bd8baecd FZ |
1882 | { |
1883 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1884 | BlockdevBackup *backup; | |
5b7bfe51 SL |
1885 | BlockDriverState *bs; |
1886 | BlockDriverState *target_bs; | |
edd5adee | 1887 | AioContext *aio_context; |
3ea67e08 SL |
1888 | AioContext *old_context; |
1889 | int ret; | |
bd8baecd | 1890 | |
6a8f9661 | 1891 | assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP); |
32bafa8f | 1892 | backup = common->action->u.blockdev_backup.data; |
bd8baecd | 1893 | |
930fe17f | 1894 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
cef34eeb | 1895 | if (!bs) { |
ff52bf36 FZ |
1896 | return; |
1897 | } | |
1898 | ||
5b7bfe51 SL |
1899 | target_bs = bdrv_lookup_bs(backup->target, backup->target, errp); |
1900 | if (!target_bs) { | |
bd8baecd FZ |
1901 | return; |
1902 | } | |
1903 | ||
3ea67e08 | 1904 | /* Honor bdrv_try_set_aio_context() context acquisition requirements. */ |
edd5adee | 1905 | aio_context = bdrv_get_aio_context(bs); |
3ea67e08 SL |
1906 | old_context = bdrv_get_aio_context(target_bs); |
1907 | aio_context_acquire(old_context); | |
1908 | ||
1909 | ret = bdrv_try_set_aio_context(target_bs, aio_context, errp); | |
1910 | if (ret < 0) { | |
1911 | aio_context_release(old_context); | |
1912 | return; | |
1913 | } | |
1914 | ||
1915 | aio_context_release(old_context); | |
edd5adee | 1916 | aio_context_acquire(aio_context); |
cef34eeb | 1917 | state->bs = bs; |
edd5adee SH |
1918 | |
1919 | /* Paired with .clean() */ | |
ff52bf36 | 1920 | bdrv_drained_begin(state->bs); |
bd8baecd | 1921 | |
5b7bfe51 SL |
1922 | state->job = do_backup_common(qapi_BlockdevBackup_base(backup), |
1923 | bs, target_bs, aio_context, | |
1924 | common->block_job_txn, errp); | |
edd5adee | 1925 | |
edd5adee | 1926 | aio_context_release(aio_context); |
111049a4 | 1927 | } |
bd8baecd | 1928 | |
111049a4 JS |
1929 | static void blockdev_backup_commit(BlkActionState *common) |
1930 | { | |
1931 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
edd5adee SH |
1932 | AioContext *aio_context; |
1933 | ||
1934 | aio_context = bdrv_get_aio_context(state->bs); | |
1935 | aio_context_acquire(aio_context); | |
1936 | ||
111049a4 | 1937 | assert(state->job); |
da01ff7f | 1938 | job_start(&state->job->job); |
edd5adee SH |
1939 | |
1940 | aio_context_release(aio_context); | |
bd8baecd FZ |
1941 | } |
1942 | ||
50f43f0f | 1943 | static void blockdev_backup_abort(BlkActionState *common) |
bd8baecd FZ |
1944 | { |
1945 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
bd8baecd | 1946 | |
111049a4 | 1947 | if (state->job) { |
edd5adee SH |
1948 | AioContext *aio_context; |
1949 | ||
1950 | aio_context = bdrv_get_aio_context(state->bs); | |
1951 | aio_context_acquire(aio_context); | |
1952 | ||
4cfb3f05 | 1953 | job_cancel_sync(&state->job->job, true); |
edd5adee SH |
1954 | |
1955 | aio_context_release(aio_context); | |
bd8baecd FZ |
1956 | } |
1957 | } | |
1958 | ||
50f43f0f | 1959 | static void blockdev_backup_clean(BlkActionState *common) |
bd8baecd FZ |
1960 | { |
1961 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
edd5adee | 1962 | AioContext *aio_context; |
bd8baecd | 1963 | |
edd5adee SH |
1964 | if (!state->bs) { |
1965 | return; | |
bd8baecd | 1966 | } |
edd5adee SH |
1967 | |
1968 | aio_context = bdrv_get_aio_context(state->bs); | |
1969 | aio_context_acquire(aio_context); | |
1970 | ||
1971 | bdrv_drained_end(state->bs); | |
1972 | ||
1973 | aio_context_release(aio_context); | |
bd8baecd FZ |
1974 | } |
1975 | ||
df9a681d | 1976 | typedef struct BlockDirtyBitmapState { |
50f43f0f | 1977 | BlkActionState common; |
df9a681d FZ |
1978 | BdrvDirtyBitmap *bitmap; |
1979 | BlockDriverState *bs; | |
df9a681d FZ |
1980 | HBitmap *backup; |
1981 | bool prepared; | |
c6490447 | 1982 | bool was_enabled; |
df9a681d FZ |
1983 | } BlockDirtyBitmapState; |
1984 | ||
50f43f0f | 1985 | static void block_dirty_bitmap_add_prepare(BlkActionState *common, |
df9a681d FZ |
1986 | Error **errp) |
1987 | { | |
1988 | Error *local_err = NULL; | |
1989 | BlockDirtyBitmapAdd *action; | |
1990 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
1991 | common, common); | |
1992 | ||
94d16a64 JS |
1993 | if (action_check_completion_mode(common, errp) < 0) { |
1994 | return; | |
1995 | } | |
1996 | ||
32bafa8f | 1997 | action = common->action->u.block_dirty_bitmap_add.data; |
df9a681d FZ |
1998 | /* AIO context taken and released within qmp_block_dirty_bitmap_add */ |
1999 | qmp_block_dirty_bitmap_add(action->node, action->name, | |
2000 | action->has_granularity, action->granularity, | |
fd5ae4cc | 2001 | action->has_persistent, action->persistent, |
0e2b7f09 | 2002 | action->has_disabled, action->disabled, |
df9a681d FZ |
2003 | &local_err); |
2004 | ||
2005 | if (!local_err) { | |
2006 | state->prepared = true; | |
2007 | } else { | |
2008 | error_propagate(errp, local_err); | |
2009 | } | |
2010 | } | |
2011 | ||
50f43f0f | 2012 | static void block_dirty_bitmap_add_abort(BlkActionState *common) |
df9a681d FZ |
2013 | { |
2014 | BlockDirtyBitmapAdd *action; | |
2015 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2016 | common, common); | |
2017 | ||
32bafa8f | 2018 | action = common->action->u.block_dirty_bitmap_add.data; |
df9a681d FZ |
2019 | /* Should not be able to fail: IF the bitmap was added via .prepare(), |
2020 | * then the node reference and bitmap name must have been valid. | |
2021 | */ | |
2022 | if (state->prepared) { | |
2023 | qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort); | |
2024 | } | |
2025 | } | |
2026 | ||
50f43f0f | 2027 | static void block_dirty_bitmap_clear_prepare(BlkActionState *common, |
df9a681d FZ |
2028 | Error **errp) |
2029 | { | |
2030 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2031 | common, common); | |
2032 | BlockDirtyBitmap *action; | |
2033 | ||
94d16a64 JS |
2034 | if (action_check_completion_mode(common, errp) < 0) { |
2035 | return; | |
2036 | } | |
2037 | ||
32bafa8f | 2038 | action = common->action->u.block_dirty_bitmap_clear.data; |
df9a681d FZ |
2039 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2040 | action->name, | |
2041 | &state->bs, | |
df9a681d FZ |
2042 | errp); |
2043 | if (!state->bitmap) { | |
2044 | return; | |
2045 | } | |
2046 | ||
3ae96d66 | 2047 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_DEFAULT, errp)) { |
d6883bc9 | 2048 | return; |
df9a681d FZ |
2049 | } |
2050 | ||
2051 | bdrv_clear_dirty_bitmap(state->bitmap, &state->backup); | |
df9a681d FZ |
2052 | } |
2053 | ||
5c4cf8b2 | 2054 | static void block_dirty_bitmap_restore(BlkActionState *common) |
df9a681d FZ |
2055 | { |
2056 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2057 | common, common); | |
2058 | ||
184dd9c4 | 2059 | if (state->backup) { |
56bd6624 | 2060 | bdrv_restore_dirty_bitmap(state->bitmap, state->backup); |
184dd9c4 | 2061 | } |
df9a681d FZ |
2062 | } |
2063 | ||
5c4cf8b2 | 2064 | static void block_dirty_bitmap_free_backup(BlkActionState *common) |
df9a681d FZ |
2065 | { |
2066 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2067 | common, common); | |
2068 | ||
2069 | hbitmap_free(state->backup); | |
2070 | } | |
2071 | ||
c6490447 VSO |
2072 | static void block_dirty_bitmap_enable_prepare(BlkActionState *common, |
2073 | Error **errp) | |
2074 | { | |
2075 | BlockDirtyBitmap *action; | |
2076 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2077 | common, common); | |
2078 | ||
2079 | if (action_check_completion_mode(common, errp) < 0) { | |
2080 | return; | |
2081 | } | |
2082 | ||
0e2b7f09 | 2083 | action = common->action->u.block_dirty_bitmap_enable.data; |
c6490447 VSO |
2084 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2085 | action->name, | |
2086 | NULL, | |
2087 | errp); | |
2088 | if (!state->bitmap) { | |
2089 | return; | |
2090 | } | |
2091 | ||
3ae96d66 | 2092 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
b053bb55 JS |
2093 | return; |
2094 | } | |
2095 | ||
c6490447 VSO |
2096 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2097 | bdrv_enable_dirty_bitmap(state->bitmap); | |
2098 | } | |
2099 | ||
2100 | static void block_dirty_bitmap_enable_abort(BlkActionState *common) | |
2101 | { | |
2102 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2103 | common, common); | |
2104 | ||
2105 | if (!state->was_enabled) { | |
2106 | bdrv_disable_dirty_bitmap(state->bitmap); | |
2107 | } | |
2108 | } | |
2109 | ||
2110 | static void block_dirty_bitmap_disable_prepare(BlkActionState *common, | |
2111 | Error **errp) | |
2112 | { | |
2113 | BlockDirtyBitmap *action; | |
2114 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2115 | common, common); | |
2116 | ||
2117 | if (action_check_completion_mode(common, errp) < 0) { | |
2118 | return; | |
2119 | } | |
2120 | ||
0e2b7f09 | 2121 | action = common->action->u.block_dirty_bitmap_disable.data; |
c6490447 VSO |
2122 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2123 | action->name, | |
2124 | NULL, | |
2125 | errp); | |
2126 | if (!state->bitmap) { | |
2127 | return; | |
2128 | } | |
2129 | ||
3ae96d66 | 2130 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
b053bb55 JS |
2131 | return; |
2132 | } | |
2133 | ||
c6490447 VSO |
2134 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2135 | bdrv_disable_dirty_bitmap(state->bitmap); | |
2136 | } | |
2137 | ||
2138 | static void block_dirty_bitmap_disable_abort(BlkActionState *common) | |
2139 | { | |
2140 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2141 | common, common); | |
2142 | ||
2143 | if (state->was_enabled) { | |
2144 | bdrv_enable_dirty_bitmap(state->bitmap); | |
2145 | } | |
2146 | } | |
2147 | ||
6fd2e407 VSO |
2148 | static void block_dirty_bitmap_merge_prepare(BlkActionState *common, |
2149 | Error **errp) | |
2150 | { | |
2151 | BlockDirtyBitmapMerge *action; | |
2152 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2153 | common, common); | |
6fd2e407 VSO |
2154 | |
2155 | if (action_check_completion_mode(common, errp) < 0) { | |
2156 | return; | |
2157 | } | |
2158 | ||
0e2b7f09 | 2159 | action = common->action->u.block_dirty_bitmap_merge.data; |
6fd2e407 | 2160 | |
c6996cf9 EB |
2161 | state->bitmap = block_dirty_bitmap_merge(action->node, action->target, |
2162 | action->bitmaps, &state->backup, | |
2163 | errp); | |
6fd2e407 VSO |
2164 | } |
2165 | ||
c4e4b0fa JS |
2166 | static void block_dirty_bitmap_remove_prepare(BlkActionState *common, |
2167 | Error **errp) | |
2168 | { | |
2169 | BlockDirtyBitmap *action; | |
2170 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2171 | common, common); | |
2172 | ||
2173 | if (action_check_completion_mode(common, errp) < 0) { | |
2174 | return; | |
2175 | } | |
2176 | ||
2177 | action = common->action->u.block_dirty_bitmap_remove.data; | |
2178 | ||
c6996cf9 EB |
2179 | state->bitmap = block_dirty_bitmap_remove(action->node, action->name, |
2180 | false, &state->bs, errp); | |
c4e4b0fa JS |
2181 | if (state->bitmap) { |
2182 | bdrv_dirty_bitmap_skip_store(state->bitmap, true); | |
2183 | bdrv_dirty_bitmap_set_busy(state->bitmap, true); | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | static void block_dirty_bitmap_remove_abort(BlkActionState *common) | |
2188 | { | |
2189 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2190 | common, common); | |
2191 | ||
2192 | if (state->bitmap) { | |
2193 | bdrv_dirty_bitmap_skip_store(state->bitmap, false); | |
2194 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
2195 | } | |
2196 | } | |
2197 | ||
2198 | static void block_dirty_bitmap_remove_commit(BlkActionState *common) | |
2199 | { | |
2200 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2201 | common, common); | |
2202 | ||
2203 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
5deb6cbd | 2204 | bdrv_release_dirty_bitmap(state->bitmap); |
c4e4b0fa JS |
2205 | } |
2206 | ||
50f43f0f | 2207 | static void abort_prepare(BlkActionState *common, Error **errp) |
78b18b78 SH |
2208 | { |
2209 | error_setg(errp, "Transaction aborted using Abort action"); | |
2210 | } | |
2211 | ||
50f43f0f | 2212 | static void abort_commit(BlkActionState *common) |
78b18b78 | 2213 | { |
dfc6f865 | 2214 | g_assert_not_reached(); /* this action never succeeds */ |
78b18b78 SH |
2215 | } |
2216 | ||
50f43f0f | 2217 | static const BlkActionOps actions[] = { |
43de7e2d AG |
2218 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = { |
2219 | .instance_size = sizeof(ExternalSnapshotState), | |
2220 | .prepare = external_snapshot_prepare, | |
2221 | .commit = external_snapshot_commit, | |
2222 | .abort = external_snapshot_abort, | |
4ad6f3db | 2223 | .clean = external_snapshot_clean, |
43de7e2d | 2224 | }, |
c8a83e85 | 2225 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
ba5d6ab6 | 2226 | .instance_size = sizeof(ExternalSnapshotState), |
ba0c86a3 WX |
2227 | .prepare = external_snapshot_prepare, |
2228 | .commit = external_snapshot_commit, | |
2229 | .abort = external_snapshot_abort, | |
da763e83 | 2230 | .clean = external_snapshot_clean, |
ba0c86a3 | 2231 | }, |
3037f364 SH |
2232 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
2233 | .instance_size = sizeof(DriveBackupState), | |
2234 | .prepare = drive_backup_prepare, | |
111049a4 | 2235 | .commit = drive_backup_commit, |
3037f364 | 2236 | .abort = drive_backup_abort, |
5d6e96ef | 2237 | .clean = drive_backup_clean, |
3037f364 | 2238 | }, |
bd8baecd FZ |
2239 | [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = { |
2240 | .instance_size = sizeof(BlockdevBackupState), | |
2241 | .prepare = blockdev_backup_prepare, | |
111049a4 | 2242 | .commit = blockdev_backup_commit, |
bd8baecd FZ |
2243 | .abort = blockdev_backup_abort, |
2244 | .clean = blockdev_backup_clean, | |
2245 | }, | |
78b18b78 | 2246 | [TRANSACTION_ACTION_KIND_ABORT] = { |
50f43f0f | 2247 | .instance_size = sizeof(BlkActionState), |
78b18b78 SH |
2248 | .prepare = abort_prepare, |
2249 | .commit = abort_commit, | |
2250 | }, | |
bbe86010 WX |
2251 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
2252 | .instance_size = sizeof(InternalSnapshotState), | |
2253 | .prepare = internal_snapshot_prepare, | |
2254 | .abort = internal_snapshot_abort, | |
5d6e96ef | 2255 | .clean = internal_snapshot_clean, |
bbe86010 | 2256 | }, |
df9a681d FZ |
2257 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = { |
2258 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2259 | .prepare = block_dirty_bitmap_add_prepare, | |
2260 | .abort = block_dirty_bitmap_add_abort, | |
2261 | }, | |
2262 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = { | |
2263 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2264 | .prepare = block_dirty_bitmap_clear_prepare, | |
5c4cf8b2 VSO |
2265 | .commit = block_dirty_bitmap_free_backup, |
2266 | .abort = block_dirty_bitmap_restore, | |
c6490447 | 2267 | }, |
0e2b7f09 | 2268 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = { |
c6490447 VSO |
2269 | .instance_size = sizeof(BlockDirtyBitmapState), |
2270 | .prepare = block_dirty_bitmap_enable_prepare, | |
2271 | .abort = block_dirty_bitmap_enable_abort, | |
2272 | }, | |
0e2b7f09 | 2273 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = { |
c6490447 VSO |
2274 | .instance_size = sizeof(BlockDirtyBitmapState), |
2275 | .prepare = block_dirty_bitmap_disable_prepare, | |
2276 | .abort = block_dirty_bitmap_disable_abort, | |
66da04dd | 2277 | }, |
0e2b7f09 | 2278 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = { |
6fd2e407 VSO |
2279 | .instance_size = sizeof(BlockDirtyBitmapState), |
2280 | .prepare = block_dirty_bitmap_merge_prepare, | |
2281 | .commit = block_dirty_bitmap_free_backup, | |
2282 | .abort = block_dirty_bitmap_restore, | |
2283 | }, | |
c4e4b0fa JS |
2284 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE] = { |
2285 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2286 | .prepare = block_dirty_bitmap_remove_prepare, | |
2287 | .commit = block_dirty_bitmap_remove_commit, | |
2288 | .abort = block_dirty_bitmap_remove_abort, | |
2289 | }, | |
66da04dd JS |
2290 | /* Where are transactions for MIRROR, COMMIT and STREAM? |
2291 | * Although these blockjobs use transaction callbacks like the backup job, | |
2292 | * these jobs do not necessarily adhere to transaction semantics. | |
2293 | * These jobs may not fully undo all of their actions on abort, nor do they | |
2294 | * necessarily work in transactions with more than one job in them. | |
2295 | */ | |
ba0c86a3 WX |
2296 | }; |
2297 | ||
94d16a64 JS |
2298 | /** |
2299 | * Allocate a TransactionProperties structure if necessary, and fill | |
2300 | * that structure with desired defaults if they are unset. | |
2301 | */ | |
2302 | static TransactionProperties *get_transaction_properties( | |
2303 | TransactionProperties *props) | |
2304 | { | |
2305 | if (!props) { | |
2306 | props = g_new0(TransactionProperties, 1); | |
2307 | } | |
2308 | ||
2309 | if (!props->has_completion_mode) { | |
2310 | props->has_completion_mode = true; | |
2311 | props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL; | |
2312 | } | |
2313 | ||
2314 | return props; | |
2315 | } | |
2316 | ||
8802d1fd | 2317 | /* |
b756b9ce SH |
2318 | * 'Atomic' group operations. The operations are performed as a set, and if |
2319 | * any fail then we roll back all operations in the group. | |
ebc2752b EGE |
2320 | * |
2321 | * Always run under BQL. | |
8802d1fd | 2322 | */ |
94d16a64 JS |
2323 | void qmp_transaction(TransactionActionList *dev_list, |
2324 | bool has_props, | |
2325 | struct TransactionProperties *props, | |
2326 | Error **errp) | |
8802d1fd | 2327 | { |
c8a83e85 | 2328 | TransactionActionList *dev_entry = dev_list; |
62c9e416 | 2329 | JobTxn *block_job_txn = NULL; |
50f43f0f | 2330 | BlkActionState *state, *next; |
43e17041 | 2331 | Error *local_err = NULL; |
8802d1fd | 2332 | |
b4ad82aa EGE |
2333 | GLOBAL_STATE_CODE(); |
2334 | ||
f4de0f8c JS |
2335 | QTAILQ_HEAD(, BlkActionState) snap_bdrv_states; |
2336 | QTAILQ_INIT(&snap_bdrv_states); | |
8802d1fd | 2337 | |
94d16a64 | 2338 | /* Does this transaction get canceled as a group on failure? |
62c9e416 | 2339 | * If not, we don't really need to make a JobTxn. |
94d16a64 JS |
2340 | */ |
2341 | props = get_transaction_properties(props); | |
2342 | if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
7eaa8fb5 | 2343 | block_job_txn = job_txn_new(); |
94d16a64 JS |
2344 | } |
2345 | ||
b756b9ce | 2346 | /* drain all i/o before any operations */ |
8802d1fd JC |
2347 | bdrv_drain_all(); |
2348 | ||
b756b9ce | 2349 | /* We don't do anything in this loop that commits us to the operations */ |
8802d1fd | 2350 | while (NULL != dev_entry) { |
c8a83e85 | 2351 | TransactionAction *dev_info = NULL; |
50f43f0f | 2352 | const BlkActionOps *ops; |
52e7c241 | 2353 | |
8802d1fd JC |
2354 | dev_info = dev_entry->value; |
2355 | dev_entry = dev_entry->next; | |
2356 | ||
6a8f9661 | 2357 | assert(dev_info->type < ARRAY_SIZE(actions)); |
ba0c86a3 | 2358 | |
6a8f9661 | 2359 | ops = &actions[dev_info->type]; |
aa3fe714 HR |
2360 | assert(ops->instance_size > 0); |
2361 | ||
ba5d6ab6 SH |
2362 | state = g_malloc0(ops->instance_size); |
2363 | state->ops = ops; | |
2364 | state->action = dev_info; | |
94d16a64 JS |
2365 | state->block_job_txn = block_job_txn; |
2366 | state->txn_props = props; | |
f4de0f8c | 2367 | QTAILQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
8802d1fd | 2368 | |
ba5d6ab6 | 2369 | state->ops->prepare(state, &local_err); |
84d18f06 | 2370 | if (local_err) { |
ba0c86a3 WX |
2371 | error_propagate(errp, local_err); |
2372 | goto delete_and_fail; | |
8802d1fd | 2373 | } |
8802d1fd JC |
2374 | } |
2375 | ||
f4de0f8c | 2376 | QTAILQ_FOREACH(state, &snap_bdrv_states, entry) { |
f9ea81e8 SH |
2377 | if (state->ops->commit) { |
2378 | state->ops->commit(state); | |
2379 | } | |
8802d1fd JC |
2380 | } |
2381 | ||
2382 | /* success */ | |
2383 | goto exit; | |
2384 | ||
2385 | delete_and_fail: | |
b756b9ce | 2386 | /* failure, and it is all-or-none; roll back all operations */ |
f4de0f8c | 2387 | QTAILQ_FOREACH_REVERSE(state, &snap_bdrv_states, entry) { |
ba5d6ab6 SH |
2388 | if (state->ops->abort) { |
2389 | state->ops->abort(state); | |
ba0c86a3 | 2390 | } |
8802d1fd JC |
2391 | } |
2392 | exit: | |
f4de0f8c | 2393 | QTAILQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
ba5d6ab6 SH |
2394 | if (state->ops->clean) { |
2395 | state->ops->clean(state); | |
ba0c86a3 | 2396 | } |
ba5d6ab6 | 2397 | g_free(state); |
8802d1fd | 2398 | } |
94d16a64 JS |
2399 | if (!has_props) { |
2400 | qapi_free_TransactionProperties(props); | |
2401 | } | |
7eaa8fb5 | 2402 | job_txn_unref(block_job_txn); |
8802d1fd JC |
2403 | } |
2404 | ||
a3b52535 VSO |
2405 | BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node, |
2406 | const char *name, | |
2407 | Error **errp) | |
2408 | { | |
2409 | BdrvDirtyBitmap *bitmap; | |
2410 | BlockDriverState *bs; | |
2411 | BlockDirtyBitmapSha256 *ret = NULL; | |
2412 | char *sha256; | |
2413 | ||
2414 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); | |
2415 | if (!bitmap || !bs) { | |
2416 | return NULL; | |
2417 | } | |
2418 | ||
2419 | sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp); | |
2420 | if (sha256 == NULL) { | |
2421 | return NULL; | |
2422 | } | |
2423 | ||
2424 | ret = g_new(BlockDirtyBitmapSha256, 1); | |
2425 | ret->sha256 = sha256; | |
2426 | ||
2427 | return ret; | |
2428 | } | |
2429 | ||
eb94b81a KW |
2430 | void coroutine_fn qmp_block_resize(bool has_device, const char *device, |
2431 | bool has_node_name, const char *node_name, | |
2432 | int64_t size, Error **errp) | |
6d4a2b3a | 2433 | { |
3b1dbd11 | 2434 | Error *local_err = NULL; |
d9dbf25f | 2435 | BlockBackend *blk; |
6d4a2b3a | 2436 | BlockDriverState *bs; |
eb94b81a | 2437 | AioContext *old_ctx; |
6d4a2b3a | 2438 | |
3b1dbd11 BC |
2439 | bs = bdrv_lookup_bs(has_device ? device : NULL, |
2440 | has_node_name ? node_name : NULL, | |
2441 | &local_err); | |
84d18f06 | 2442 | if (local_err) { |
3b1dbd11 BC |
2443 | error_propagate(errp, local_err); |
2444 | return; | |
2445 | } | |
2446 | ||
6d4a2b3a | 2447 | if (size < 0) { |
c6bd8c70 | 2448 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
d9dbf25f | 2449 | return; |
6d4a2b3a CH |
2450 | } |
2451 | ||
9c75e168 | 2452 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { |
c6bd8c70 | 2453 | error_setg(errp, QERR_DEVICE_IN_USE, device); |
d9dbf25f | 2454 | return; |
9c75e168 JC |
2455 | } |
2456 | ||
a3aeeab5 EB |
2457 | blk = blk_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, errp); |
2458 | if (!blk) { | |
d9dbf25f | 2459 | return; |
d7086422 | 2460 | } |
7dad9ee6 | 2461 | |
8089eab2 | 2462 | bdrv_co_lock(bs); |
698bdfa0 | 2463 | bdrv_drained_begin(bs); |
8089eab2 KW |
2464 | bdrv_co_unlock(bs); |
2465 | ||
eb94b81a | 2466 | old_ctx = bdrv_co_enter(bs); |
a3aeeab5 | 2467 | blk_truncate(blk, size, false, PREALLOC_MODE_OFF, 0, errp); |
eb94b81a | 2468 | bdrv_co_leave(bs, old_ctx); |
927e0e76 | 2469 | |
eb94b81a | 2470 | bdrv_co_lock(bs); |
8089eab2 | 2471 | bdrv_drained_end(bs); |
7dad9ee6 | 2472 | blk_unref(blk); |
eb94b81a | 2473 | bdrv_co_unlock(bs); |
6d4a2b3a | 2474 | } |
12bd451f | 2475 | |
2323322e | 2476 | void qmp_block_stream(bool has_job_id, const char *job_id, const char *device, |
13d8cc51 | 2477 | bool has_base, const char *base, |
312fe09c | 2478 | bool has_base_node, const char *base_node, |
13d8cc51 | 2479 | bool has_backing_file, const char *backing_file, |
7f4a396d | 2480 | bool has_bottom, const char *bottom, |
13d8cc51 | 2481 | bool has_speed, int64_t speed, |
1d809098 | 2482 | bool has_on_error, BlockdevOnError on_error, |
880747a8 | 2483 | bool has_filter_node_name, const char *filter_node_name, |
241ca1ab JS |
2484 | bool has_auto_finalize, bool auto_finalize, |
2485 | bool has_auto_dismiss, bool auto_dismiss, | |
1d809098 | 2486 | Error **errp) |
12bd451f | 2487 | { |
7f4a396d | 2488 | BlockDriverState *bs, *iter, *iter_end; |
c8c3080f | 2489 | BlockDriverState *base_bs = NULL; |
7f4a396d | 2490 | BlockDriverState *bottom_bs = NULL; |
f3e69beb | 2491 | AioContext *aio_context; |
fd7f8c65 | 2492 | Error *local_err = NULL; |
cf6320df | 2493 | int job_flags = JOB_DEFAULT; |
12bd451f | 2494 | |
7f4a396d VSO |
2495 | if (has_base && has_base_node) { |
2496 | error_setg(errp, "'base' and 'base-node' cannot be specified " | |
2497 | "at the same time"); | |
2498 | return; | |
2499 | } | |
2500 | ||
2501 | if (has_base && has_bottom) { | |
2502 | error_setg(errp, "'base' and 'bottom' cannot be specified " | |
2503 | "at the same time"); | |
2504 | return; | |
2505 | } | |
2506 | ||
2507 | if (has_bottom && has_base_node) { | |
2508 | error_setg(errp, "'bottom' and 'base-node' cannot be specified " | |
2509 | "at the same time"); | |
2510 | return; | |
2511 | } | |
2512 | ||
1d809098 PB |
2513 | if (!has_on_error) { |
2514 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2515 | } | |
2516 | ||
554b6147 | 2517 | bs = bdrv_lookup_bs(device, device, errp); |
b6c1bae5 | 2518 | if (!bs) { |
12bd451f SH |
2519 | return; |
2520 | } | |
2521 | ||
b6c1bae5 | 2522 | aio_context = bdrv_get_aio_context(bs); |
f3e69beb SH |
2523 | aio_context_acquire(aio_context); |
2524 | ||
13d8cc51 | 2525 | if (has_base) { |
c8c3080f MT |
2526 | base_bs = bdrv_find_backing_image(bs, base); |
2527 | if (base_bs == NULL) { | |
b0d7be2a | 2528 | error_setg(errp, "Can't find '%s' in the backing chain", base); |
f3e69beb | 2529 | goto out; |
c8c3080f | 2530 | } |
f3e69beb | 2531 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
12bd451f SH |
2532 | } |
2533 | ||
312fe09c AG |
2534 | if (has_base_node) { |
2535 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); | |
2536 | if (!base_bs) { | |
2537 | goto out; | |
2538 | } | |
2539 | if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) { | |
2540 | error_setg(errp, "Node '%s' is not a backing image of '%s'", | |
2541 | base_node, device); | |
2542 | goto out; | |
2543 | } | |
2544 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
f30c66ba | 2545 | bdrv_refresh_filename(base_bs); |
312fe09c AG |
2546 | } |
2547 | ||
7f4a396d VSO |
2548 | if (has_bottom) { |
2549 | bottom_bs = bdrv_lookup_bs(NULL, bottom, errp); | |
2550 | if (!bottom_bs) { | |
2551 | goto out; | |
2552 | } | |
2553 | if (!bottom_bs->drv) { | |
2554 | error_setg(errp, "Node '%s' is not open", bottom); | |
2555 | goto out; | |
2556 | } | |
2557 | if (bottom_bs->drv->is_filter) { | |
2558 | error_setg(errp, "Node '%s' is a filter, use a non-filter node " | |
2559 | "as 'bottom'", bottom); | |
2560 | goto out; | |
2561 | } | |
2562 | if (!bdrv_chain_contains(bs, bottom_bs)) { | |
2563 | error_setg(errp, "Node '%s' is not in a chain starting from '%s'", | |
2564 | bottom, device); | |
2565 | goto out; | |
2566 | } | |
2567 | assert(bdrv_get_aio_context(bottom_bs) == aio_context); | |
2568 | } | |
2569 | ||
2570 | /* | |
2571 | * Check for op blockers in the whole chain between bs and base (or bottom) | |
2572 | */ | |
2573 | iter_end = has_bottom ? bdrv_filter_or_cow_bs(bottom_bs) : base_bs; | |
2574 | for (iter = bs; iter && iter != iter_end; | |
67acfd21 HR |
2575 | iter = bdrv_filter_or_cow_bs(iter)) |
2576 | { | |
554b6147 AG |
2577 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) { |
2578 | goto out; | |
2579 | } | |
2580 | } | |
2581 | ||
13d8cc51 JC |
2582 | /* if we are streaming the entire chain, the result will have no backing |
2583 | * file, and specifying one is therefore an error */ | |
2584 | if (base_bs == NULL && has_backing_file) { | |
2585 | error_setg(errp, "backing file specified, but streaming the " | |
2586 | "entire chain"); | |
f3e69beb | 2587 | goto out; |
13d8cc51 JC |
2588 | } |
2589 | ||
241ca1ab JS |
2590 | if (has_auto_finalize && !auto_finalize) { |
2591 | job_flags |= JOB_MANUAL_FINALIZE; | |
2592 | } | |
2593 | if (has_auto_dismiss && !auto_dismiss) { | |
2594 | job_flags |= JOB_MANUAL_DISMISS; | |
2595 | } | |
2596 | ||
000e5a1c | 2597 | stream_start(has_job_id ? job_id : NULL, bs, base_bs, backing_file, |
7f4a396d | 2598 | bottom_bs, job_flags, has_speed ? speed : 0, on_error, |
880747a8 | 2599 | filter_node_name, &local_err); |
84d18f06 | 2600 | if (local_err) { |
fd7f8c65 | 2601 | error_propagate(errp, local_err); |
f3e69beb | 2602 | goto out; |
12bd451f SH |
2603 | } |
2604 | ||
b23c580c | 2605 | trace_qmp_block_stream(bs); |
f3e69beb SH |
2606 | |
2607 | out: | |
2608 | aio_context_release(aio_context); | |
12bd451f | 2609 | } |
2d47c6e9 | 2610 | |
fd62c609 | 2611 | void qmp_block_commit(bool has_job_id, const char *job_id, const char *device, |
3c605f40 | 2612 | bool has_base_node, const char *base_node, |
7676e2c5 | 2613 | bool has_base, const char *base, |
3c605f40 | 2614 | bool has_top_node, const char *top_node, |
7676e2c5 | 2615 | bool has_top, const char *top, |
54e26900 | 2616 | bool has_backing_file, const char *backing_file, |
ed61fc10 | 2617 | bool has_speed, int64_t speed, |
8faad1c7 | 2618 | bool has_on_error, BlockdevOnError on_error, |
0db832f4 | 2619 | bool has_filter_node_name, const char *filter_node_name, |
96fbf534 JS |
2620 | bool has_auto_finalize, bool auto_finalize, |
2621 | bool has_auto_dismiss, bool auto_dismiss, | |
ed61fc10 JC |
2622 | Error **errp) |
2623 | { | |
2624 | BlockDriverState *bs; | |
058223a6 | 2625 | BlockDriverState *iter; |
ed61fc10 | 2626 | BlockDriverState *base_bs, *top_bs; |
9e85cd5c | 2627 | AioContext *aio_context; |
ed61fc10 | 2628 | Error *local_err = NULL; |
5360782d | 2629 | int job_flags = JOB_DEFAULT; |
05ea385a | 2630 | uint64_t top_perm, top_shared; |
ed61fc10 | 2631 | |
54504663 HR |
2632 | if (!has_speed) { |
2633 | speed = 0; | |
2634 | } | |
8faad1c7 KW |
2635 | if (!has_on_error) { |
2636 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2637 | } | |
0db832f4 KW |
2638 | if (!has_filter_node_name) { |
2639 | filter_node_name = NULL; | |
2640 | } | |
96fbf534 JS |
2641 | if (has_auto_finalize && !auto_finalize) { |
2642 | job_flags |= JOB_MANUAL_FINALIZE; | |
2643 | } | |
2644 | if (has_auto_dismiss && !auto_dismiss) { | |
2645 | job_flags |= JOB_MANUAL_DISMISS; | |
2646 | } | |
54504663 | 2647 | |
7676e2c5 JC |
2648 | /* Important Note: |
2649 | * libvirt relies on the DeviceNotFound error class in order to probe for | |
2650 | * live commit feature versions; for this to work, we must make sure to | |
2651 | * perform the device lookup before any generic errors that may occur in a | |
2652 | * scenario in which all optional arguments are omitted. */ | |
1d13b167 KW |
2653 | bs = qmp_get_root_bs(device, &local_err); |
2654 | if (!bs) { | |
2655 | bs = bdrv_lookup_bs(device, device, NULL); | |
2656 | if (!bs) { | |
2657 | error_free(local_err); | |
2658 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2659 | "Device '%s' not found", device); | |
2660 | } else { | |
2661 | error_propagate(errp, local_err); | |
2662 | } | |
ed61fc10 | 2663 | return; |
628ff683 FZ |
2664 | } |
2665 | ||
1d13b167 | 2666 | aio_context = bdrv_get_aio_context(bs); |
9e85cd5c SH |
2667 | aio_context_acquire(aio_context); |
2668 | ||
bb00021d | 2669 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) { |
9e85cd5c | 2670 | goto out; |
ed61fc10 | 2671 | } |
ed61fc10 JC |
2672 | |
2673 | /* default top_bs is the active layer */ | |
2674 | top_bs = bs; | |
2675 | ||
3c605f40 KW |
2676 | if (has_top_node && has_top) { |
2677 | error_setg(errp, "'top-node' and 'top' are mutually exclusive"); | |
2678 | goto out; | |
2679 | } else if (has_top_node) { | |
2680 | top_bs = bdrv_lookup_bs(NULL, top_node, errp); | |
2681 | if (top_bs == NULL) { | |
2682 | goto out; | |
2683 | } | |
2684 | if (!bdrv_chain_contains(bs, top_bs)) { | |
2685 | error_setg(errp, "'%s' is not in this backing file chain", | |
2686 | top_node); | |
2687 | goto out; | |
2688 | } | |
2689 | } else if (has_top && top) { | |
f30c66ba HR |
2690 | /* This strcmp() is just a shortcut, there is no need to |
2691 | * refresh @bs's filename. If it mismatches, | |
2692 | * bdrv_find_backing_image() will do the refresh and may still | |
2693 | * return @bs. */ | |
ed61fc10 JC |
2694 | if (strcmp(bs->filename, top) != 0) { |
2695 | top_bs = bdrv_find_backing_image(bs, top); | |
2696 | } | |
2697 | } | |
2698 | ||
2699 | if (top_bs == NULL) { | |
2700 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
9e85cd5c | 2701 | goto out; |
ed61fc10 JC |
2702 | } |
2703 | ||
9e85cd5c SH |
2704 | assert(bdrv_get_aio_context(top_bs) == aio_context); |
2705 | ||
3c605f40 KW |
2706 | if (has_base_node && has_base) { |
2707 | error_setg(errp, "'base-node' and 'base' are mutually exclusive"); | |
2708 | goto out; | |
2709 | } else if (has_base_node) { | |
2710 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); | |
2711 | if (base_bs == NULL) { | |
2712 | goto out; | |
2713 | } | |
2714 | if (!bdrv_chain_contains(top_bs, base_bs)) { | |
2715 | error_setg(errp, "'%s' is not in this backing file chain", | |
2716 | base_node); | |
2717 | goto out; | |
2718 | } | |
2719 | } else if (has_base && base) { | |
d5208c45 | 2720 | base_bs = bdrv_find_backing_image(top_bs, base); |
b0d7be2a MA |
2721 | if (base_bs == NULL) { |
2722 | error_setg(errp, "Can't find '%s' in the backing chain", base); | |
2723 | goto out; | |
2724 | } | |
d5208c45 JC |
2725 | } else { |
2726 | base_bs = bdrv_find_base(top_bs); | |
b0d7be2a MA |
2727 | if (base_bs == NULL) { |
2728 | error_setg(errp, "There is no backimg image"); | |
2729 | goto out; | |
2730 | } | |
d5208c45 JC |
2731 | } |
2732 | ||
9e85cd5c SH |
2733 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
2734 | ||
9a71b9de HR |
2735 | for (iter = top_bs; iter != bdrv_filter_or_cow_bs(base_bs); |
2736 | iter = bdrv_filter_or_cow_bs(iter)) | |
2737 | { | |
058223a6 AG |
2738 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { |
2739 | goto out; | |
2740 | } | |
bb00021d FZ |
2741 | } |
2742 | ||
7676e2c5 JC |
2743 | /* Do not allow attempts to commit an image into itself */ |
2744 | if (top_bs == base_bs) { | |
2745 | error_setg(errp, "cannot commit an image into itself"); | |
9e85cd5c | 2746 | goto out; |
7676e2c5 JC |
2747 | } |
2748 | ||
05ea385a HR |
2749 | /* |
2750 | * Active commit is required if and only if someone has taken a | |
2751 | * WRITE permission on the top node. Historically, we have always | |
2752 | * used active commit for top nodes, so continue that practice | |
2753 | * lest we possibly break clients that rely on this behavior, e.g. | |
2754 | * to later attach this node to a writing parent. | |
2755 | * (Active commit is never really wrong.) | |
2756 | */ | |
2757 | bdrv_get_cumulative_perm(top_bs, &top_perm, &top_shared); | |
2758 | if (top_perm & BLK_PERM_WRITE || | |
2759 | bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) | |
2760 | { | |
54e26900 | 2761 | if (has_backing_file) { |
05ea385a HR |
2762 | if (bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) { |
2763 | error_setg(errp, "'backing-file' specified," | |
2764 | " but 'top' is the active layer"); | |
2765 | } else { | |
2766 | error_setg(errp, "'backing-file' specified, but 'top' has a " | |
2767 | "writer on it"); | |
2768 | } | |
9e85cd5c | 2769 | goto out; |
54e26900 | 2770 | } |
05ea385a HR |
2771 | if (!has_job_id) { |
2772 | /* | |
2773 | * Emulate here what block_job_create() does, because it | |
2774 | * is possible that @bs != @top_bs (the block job should | |
2775 | * be named after @bs, even if @top_bs is the actual | |
2776 | * source) | |
2777 | */ | |
2778 | job_id = bdrv_get_device_name(bs); | |
2779 | } | |
2780 | commit_active_start(job_id, top_bs, base_bs, job_flags, speed, on_error, | |
78bbd910 | 2781 | filter_node_name, NULL, NULL, false, &local_err); |
20a63d2c | 2782 | } else { |
058223a6 AG |
2783 | BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs); |
2784 | if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { | |
2785 | goto out; | |
2786 | } | |
5360782d JS |
2787 | commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, job_flags, |
2788 | speed, on_error, has_backing_file ? backing_file : NULL, | |
0db832f4 | 2789 | filter_node_name, &local_err); |
20a63d2c | 2790 | } |
ed61fc10 JC |
2791 | if (local_err != NULL) { |
2792 | error_propagate(errp, local_err); | |
9e85cd5c | 2793 | goto out; |
ed61fc10 | 2794 | } |
9e85cd5c SH |
2795 | |
2796 | out: | |
2797 | aio_context_release(aio_context); | |
ed61fc10 JC |
2798 | } |
2799 | ||
7b0b870b JS |
2800 | /* Common QMP interface for drive-backup and blockdev-backup */ |
2801 | static BlockJob *do_backup_common(BackupCommon *backup, | |
2802 | BlockDriverState *bs, | |
2803 | BlockDriverState *target_bs, | |
2804 | AioContext *aio_context, | |
2805 | JobTxn *txn, Error **errp) | |
99a9addf | 2806 | { |
111049a4 | 2807 | BlockJob *job = NULL; |
d58d8453 | 2808 | BdrvDirtyBitmap *bmap = NULL; |
6a30f663 | 2809 | BackupPerf perf = { .max_workers = 64 }; |
7b0b870b | 2810 | int job_flags = JOB_DEFAULT; |
99a9addf | 2811 | |
81206a89 PB |
2812 | if (!backup->has_speed) { |
2813 | backup->speed = 0; | |
99a9addf | 2814 | } |
81206a89 PB |
2815 | if (!backup->has_on_source_error) { |
2816 | backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
99a9addf | 2817 | } |
81206a89 PB |
2818 | if (!backup->has_on_target_error) { |
2819 | backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
99a9addf | 2820 | } |
81206a89 PB |
2821 | if (!backup->has_job_id) { |
2822 | backup->job_id = NULL; | |
99a9addf | 2823 | } |
b40dacdc JS |
2824 | if (!backup->has_auto_finalize) { |
2825 | backup->auto_finalize = true; | |
2826 | } | |
2827 | if (!backup->has_auto_dismiss) { | |
2828 | backup->auto_dismiss = true; | |
2829 | } | |
13b9414b PB |
2830 | if (!backup->has_compress) { |
2831 | backup->compress = false; | |
2832 | } | |
99a9addf | 2833 | |
86c6a3b6 VSO |
2834 | if (backup->x_perf) { |
2835 | if (backup->x_perf->has_use_copy_range) { | |
2836 | perf.use_copy_range = backup->x_perf->use_copy_range; | |
2837 | } | |
2c59fd83 VSO |
2838 | if (backup->x_perf->has_max_workers) { |
2839 | perf.max_workers = backup->x_perf->max_workers; | |
2840 | } | |
2841 | if (backup->x_perf->has_max_chunk) { | |
2842 | perf.max_chunk = backup->x_perf->max_chunk; | |
2843 | } | |
86c6a3b6 VSO |
2844 | } |
2845 | ||
a6c9365a JS |
2846 | if ((backup->sync == MIRROR_SYNC_MODE_BITMAP) || |
2847 | (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL)) { | |
2848 | /* done before desugaring 'incremental' to print the right message */ | |
2849 | if (!backup->has_bitmap) { | |
2850 | error_setg(errp, "must provide a valid bitmap name for " | |
2851 | "'%s' sync mode", MirrorSyncMode_str(backup->sync)); | |
2852 | return NULL; | |
2853 | } | |
2854 | } | |
2855 | ||
c8b56501 JS |
2856 | if (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL) { |
2857 | if (backup->has_bitmap_mode && | |
2858 | backup->bitmap_mode != BITMAP_SYNC_MODE_ON_SUCCESS) { | |
2859 | error_setg(errp, "Bitmap sync mode must be '%s' " | |
2860 | "when using sync mode '%s'", | |
2861 | BitmapSyncMode_str(BITMAP_SYNC_MODE_ON_SUCCESS), | |
2862 | MirrorSyncMode_str(backup->sync)); | |
2863 | return NULL; | |
2864 | } | |
2865 | backup->has_bitmap_mode = true; | |
2866 | backup->sync = MIRROR_SYNC_MODE_BITMAP; | |
2867 | backup->bitmap_mode = BITMAP_SYNC_MODE_ON_SUCCESS; | |
2868 | } | |
2869 | ||
7b0b870b JS |
2870 | if (backup->has_bitmap) { |
2871 | bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap); | |
2872 | if (!bmap) { | |
2873 | error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap); | |
2874 | return NULL; | |
2875 | } | |
c8b56501 JS |
2876 | if (!backup->has_bitmap_mode) { |
2877 | error_setg(errp, "Bitmap sync mode must be given " | |
2878 | "when providing a bitmap"); | |
2879 | return NULL; | |
2880 | } | |
b30ffbef | 2881 | if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
7b0b870b JS |
2882 | return NULL; |
2883 | } | |
1a2b8b40 JS |
2884 | |
2885 | /* This does not produce a useful bitmap artifact: */ | |
2886 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
2887 | error_setg(errp, "sync mode '%s' does not produce meaningful bitmap" | |
2888 | " outputs", MirrorSyncMode_str(backup->sync)); | |
2889 | return NULL; | |
2890 | } | |
2891 | ||
2892 | /* If the bitmap isn't used for input or output, this is useless: */ | |
2893 | if (backup->bitmap_mode == BITMAP_SYNC_MODE_NEVER && | |
2894 | backup->sync != MIRROR_SYNC_MODE_BITMAP) { | |
2895 | error_setg(errp, "Bitmap sync mode '%s' has no meaningful effect" | |
2896 | " when combined with sync mode '%s'", | |
2897 | BitmapSyncMode_str(backup->bitmap_mode), | |
2898 | MirrorSyncMode_str(backup->sync)); | |
2899 | return NULL; | |
2900 | } | |
2901 | } | |
2902 | ||
2903 | if (!backup->has_bitmap && backup->has_bitmap_mode) { | |
2904 | error_setg(errp, "Cannot specify bitmap sync mode without a bitmap"); | |
2905 | return NULL; | |
7b0b870b JS |
2906 | } |
2907 | ||
2908 | if (!backup->auto_finalize) { | |
2909 | job_flags |= JOB_MANUAL_FINALIZE; | |
2910 | } | |
2911 | if (!backup->auto_dismiss) { | |
2912 | job_flags |= JOB_MANUAL_DISMISS; | |
2913 | } | |
2914 | ||
2915 | job = backup_job_create(backup->job_id, bs, target_bs, backup->speed, | |
c8b56501 JS |
2916 | backup->sync, bmap, backup->bitmap_mode, |
2917 | backup->compress, | |
00e30f05 | 2918 | backup->filter_node_name, |
86c6a3b6 | 2919 | &perf, |
c8b56501 JS |
2920 | backup->on_source_error, |
2921 | backup->on_target_error, | |
7b0b870b JS |
2922 | job_flags, NULL, NULL, txn, errp); |
2923 | return job; | |
2924 | } | |
2925 | ||
2288ccfa | 2926 | void qmp_drive_backup(DriveBackup *backup, Error **errp) |
78f51fde | 2927 | { |
2288ccfa SL |
2928 | TransactionAction action = { |
2929 | .type = TRANSACTION_ACTION_KIND_DRIVE_BACKUP, | |
2930 | .u.drive_backup.data = backup, | |
2931 | }; | |
2932 | blockdev_do_action(&action, errp); | |
78f51fde JS |
2933 | } |
2934 | ||
facda544 PK |
2935 | BlockDeviceInfoList *qmp_query_named_block_nodes(bool has_flat, |
2936 | bool flat, | |
2937 | Error **errp) | |
c13163fb | 2938 | { |
facda544 PK |
2939 | bool return_flat = has_flat && flat; |
2940 | ||
2941 | return bdrv_named_nodes_list(return_flat, errp); | |
c13163fb BC |
2942 | } |
2943 | ||
5d3b4e99 VSO |
2944 | XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp) |
2945 | { | |
2946 | return bdrv_get_xdbg_block_graph(errp); | |
2947 | } | |
2948 | ||
5b7bfe51 | 2949 | void qmp_blockdev_backup(BlockdevBackup *backup, Error **errp) |
c29c1dd3 | 2950 | { |
5b7bfe51 SL |
2951 | TransactionAction action = { |
2952 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP, | |
2953 | .u.blockdev_backup.data = backup, | |
2954 | }; | |
2955 | blockdev_do_action(&action, errp); | |
78f51fde JS |
2956 | } |
2957 | ||
4193cdd7 FZ |
2958 | /* Parameter check and block job starting for drive mirroring. |
2959 | * Caller should hold @device and @target's aio context (must be the same). | |
2960 | **/ | |
71aa9867 | 2961 | static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs, |
4193cdd7 FZ |
2962 | BlockDriverState *target, |
2963 | bool has_replaces, const char *replaces, | |
2964 | enum MirrorSyncMode sync, | |
274fccee | 2965 | BlockMirrorBackingMode backing_mode, |
cdf3bc93 | 2966 | bool zero_target, |
4193cdd7 FZ |
2967 | bool has_speed, int64_t speed, |
2968 | bool has_granularity, uint32_t granularity, | |
2969 | bool has_buf_size, int64_t buf_size, | |
2970 | bool has_on_source_error, | |
2971 | BlockdevOnError on_source_error, | |
2972 | bool has_on_target_error, | |
2973 | BlockdevOnError on_target_error, | |
2974 | bool has_unmap, bool unmap, | |
6cdbceb1 KW |
2975 | bool has_filter_node_name, |
2976 | const char *filter_node_name, | |
481debaa | 2977 | bool has_copy_mode, MirrorCopyMode copy_mode, |
a6b58ade JS |
2978 | bool has_auto_finalize, bool auto_finalize, |
2979 | bool has_auto_dismiss, bool auto_dismiss, | |
4193cdd7 | 2980 | Error **errp) |
d9b902db | 2981 | { |
3f072a7f | 2982 | BlockDriverState *unfiltered_bs; |
a1999b33 | 2983 | int job_flags = JOB_DEFAULT; |
d9b902db PB |
2984 | |
2985 | if (!has_speed) { | |
2986 | speed = 0; | |
2987 | } | |
b952b558 PB |
2988 | if (!has_on_source_error) { |
2989 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2990 | } | |
2991 | if (!has_on_target_error) { | |
2992 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2993 | } | |
eee13dfe PB |
2994 | if (!has_granularity) { |
2995 | granularity = 0; | |
2996 | } | |
08e4ed6c | 2997 | if (!has_buf_size) { |
48ac0a4d | 2998 | buf_size = 0; |
08e4ed6c | 2999 | } |
0fc9f8ea FZ |
3000 | if (!has_unmap) { |
3001 | unmap = true; | |
3002 | } | |
6cdbceb1 KW |
3003 | if (!has_filter_node_name) { |
3004 | filter_node_name = NULL; | |
3005 | } | |
481debaa HR |
3006 | if (!has_copy_mode) { |
3007 | copy_mode = MIRROR_COPY_MODE_BACKGROUND; | |
3008 | } | |
a6b58ade JS |
3009 | if (has_auto_finalize && !auto_finalize) { |
3010 | job_flags |= JOB_MANUAL_FINALIZE; | |
3011 | } | |
3012 | if (has_auto_dismiss && !auto_dismiss) { | |
3013 | job_flags |= JOB_MANUAL_DISMISS; | |
3014 | } | |
08e4ed6c | 3015 | |
eee13dfe | 3016 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
c6bd8c70 MA |
3017 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", |
3018 | "a value in range [512B, 64MB]"); | |
eee13dfe PB |
3019 | return; |
3020 | } | |
3021 | if (granularity & (granularity - 1)) { | |
c6bd8c70 | 3022 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", |
6cc0667d | 3023 | "a power of 2"); |
eee13dfe PB |
3024 | return; |
3025 | } | |
d9b902db | 3026 | |
4193cdd7 FZ |
3027 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { |
3028 | return; | |
3029 | } | |
e40e5027 FZ |
3030 | if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) { |
3031 | return; | |
3032 | } | |
4193cdd7 | 3033 | |
3f072a7f | 3034 | if (!bdrv_backing_chain_next(bs) && sync == MIRROR_SYNC_MODE_TOP) { |
4193cdd7 FZ |
3035 | sync = MIRROR_SYNC_MODE_FULL; |
3036 | } | |
3037 | ||
3f072a7f HR |
3038 | if (!has_replaces) { |
3039 | /* We want to mirror from @bs, but keep implicit filters on top */ | |
3040 | unfiltered_bs = bdrv_skip_implicit_filters(bs); | |
3041 | if (unfiltered_bs != bs) { | |
3042 | replaces = unfiltered_bs->node_name; | |
3043 | has_replaces = true; | |
3044 | } | |
3045 | } | |
3046 | ||
74ce9e46 HR |
3047 | if (has_replaces) { |
3048 | BlockDriverState *to_replace_bs; | |
3049 | AioContext *replace_aio_context; | |
3050 | int64_t bs_size, replace_size; | |
3051 | ||
3052 | bs_size = bdrv_getlength(bs); | |
3053 | if (bs_size < 0) { | |
3054 | error_setg_errno(errp, -bs_size, "Failed to query device's size"); | |
3055 | return; | |
3056 | } | |
3057 | ||
3058 | to_replace_bs = check_to_replace_node(bs, replaces, errp); | |
3059 | if (!to_replace_bs) { | |
3060 | return; | |
3061 | } | |
3062 | ||
3063 | replace_aio_context = bdrv_get_aio_context(to_replace_bs); | |
3064 | aio_context_acquire(replace_aio_context); | |
3065 | replace_size = bdrv_getlength(to_replace_bs); | |
3066 | aio_context_release(replace_aio_context); | |
3067 | ||
3068 | if (replace_size < 0) { | |
3069 | error_setg_errno(errp, -replace_size, | |
3070 | "Failed to query the replacement node's size"); | |
3071 | return; | |
3072 | } | |
3073 | if (bs_size != replace_size) { | |
3074 | error_setg(errp, "cannot replace image with a mirror image of " | |
3075 | "different size"); | |
3076 | return; | |
3077 | } | |
3078 | } | |
3079 | ||
4193cdd7 FZ |
3080 | /* pass the node name to replace to mirror start since it's loose coupling |
3081 | * and will allow to check whether the node still exist at mirror completion | |
3082 | */ | |
71aa9867 | 3083 | mirror_start(job_id, bs, target, |
a1999b33 | 3084 | has_replaces ? replaces : NULL, job_flags, |
cdf3bc93 | 3085 | speed, granularity, buf_size, sync, backing_mode, zero_target, |
6cdbceb1 | 3086 | on_source_error, on_target_error, unmap, filter_node_name, |
481debaa | 3087 | copy_mode, errp); |
4193cdd7 FZ |
3088 | } |
3089 | ||
faecd40a | 3090 | void qmp_drive_mirror(DriveMirror *arg, Error **errp) |
4193cdd7 FZ |
3091 | { |
3092 | BlockDriverState *bs; | |
3f072a7f | 3093 | BlockDriverState *target_backing_bs, *target_bs; |
4193cdd7 | 3094 | AioContext *aio_context; |
3ea67e08 | 3095 | AioContext *old_context; |
274fccee | 3096 | BlockMirrorBackingMode backing_mode; |
4193cdd7 FZ |
3097 | Error *local_err = NULL; |
3098 | QDict *options = NULL; | |
3099 | int flags; | |
3100 | int64_t size; | |
faecd40a | 3101 | const char *format = arg->format; |
cdf3bc93 | 3102 | bool zero_target; |
8ed7d42f | 3103 | int ret; |
4193cdd7 | 3104 | |
0524e93a KW |
3105 | bs = qmp_get_root_bs(arg->device, errp); |
3106 | if (!bs) { | |
d9b902db PB |
3107 | return; |
3108 | } | |
3109 | ||
cb2af917 PB |
3110 | /* Early check to avoid creating target */ |
3111 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { | |
3112 | return; | |
3113 | } | |
3114 | ||
0524e93a | 3115 | aio_context = bdrv_get_aio_context(bs); |
5a7e7a0b SH |
3116 | aio_context_acquire(aio_context); |
3117 | ||
faecd40a EB |
3118 | if (!arg->has_mode) { |
3119 | arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
4193cdd7 | 3120 | } |
d9b902db | 3121 | |
faecd40a EB |
3122 | if (!arg->has_format) { |
3123 | format = (arg->mode == NEW_IMAGE_MODE_EXISTING | |
3124 | ? NULL : bs->drv->format_name); | |
d9b902db | 3125 | } |
d9b902db | 3126 | |
61de4c68 | 3127 | flags = bs->open_flags | BDRV_O_RDWR; |
3f072a7f HR |
3128 | target_backing_bs = bdrv_cow_bs(bdrv_skip_filters(bs)); |
3129 | if (!target_backing_bs && arg->sync == MIRROR_SYNC_MODE_TOP) { | |
faecd40a | 3130 | arg->sync = MIRROR_SYNC_MODE_FULL; |
d9b902db | 3131 | } |
faecd40a | 3132 | if (arg->sync == MIRROR_SYNC_MODE_NONE) { |
3f072a7f | 3133 | target_backing_bs = bs; |
117e0c82 | 3134 | } |
d9b902db | 3135 | |
ac3c5d83 SH |
3136 | size = bdrv_getlength(bs); |
3137 | if (size < 0) { | |
3138 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
5a7e7a0b | 3139 | goto out; |
ac3c5d83 SH |
3140 | } |
3141 | ||
faecd40a | 3142 | if (arg->has_replaces) { |
faecd40a | 3143 | if (!arg->has_node_name) { |
09158f00 BC |
3144 | error_setg(errp, "a node-name must be provided when replacing a" |
3145 | " named node of the graph"); | |
5a7e7a0b | 3146 | goto out; |
09158f00 | 3147 | } |
09158f00 BC |
3148 | } |
3149 | ||
faecd40a | 3150 | if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) { |
274fccee HR |
3151 | backing_mode = MIRROR_SOURCE_BACKING_CHAIN; |
3152 | } else { | |
3153 | backing_mode = MIRROR_OPEN_BACKING_CHAIN; | |
3154 | } | |
3155 | ||
2a32c6e8 JS |
3156 | /* Don't open backing image in create() */ |
3157 | flags |= BDRV_O_NO_BACKING; | |
3158 | ||
3f072a7f | 3159 | if ((arg->sync == MIRROR_SYNC_MODE_FULL || !target_backing_bs) |
faecd40a | 3160 | && arg->mode != NEW_IMAGE_MODE_EXISTING) |
14526864 | 3161 | { |
d9b902db | 3162 | /* create new image w/o backing file */ |
e6641719 | 3163 | assert(format); |
faecd40a | 3164 | bdrv_img_create(arg->target, format, |
9217283d | 3165 | NULL, NULL, NULL, size, flags, false, &local_err); |
d9b902db | 3166 | } else { |
3f072a7f HR |
3167 | /* Implicit filters should not appear in the filename */ |
3168 | BlockDriverState *explicit_backing = | |
3169 | bdrv_skip_implicit_filters(target_backing_bs); | |
3170 | ||
faecd40a | 3171 | switch (arg->mode) { |
d9b902db | 3172 | case NEW_IMAGE_MODE_EXISTING: |
d9b902db PB |
3173 | break; |
3174 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
3175 | /* create new image with backing file */ | |
3f072a7f | 3176 | bdrv_refresh_filename(explicit_backing); |
faecd40a | 3177 | bdrv_img_create(arg->target, format, |
3f072a7f HR |
3178 | explicit_backing->filename, |
3179 | explicit_backing->drv->format_name, | |
9217283d | 3180 | NULL, size, flags, false, &local_err); |
d9b902db PB |
3181 | break; |
3182 | default: | |
3183 | abort(); | |
3184 | } | |
3185 | } | |
3186 | ||
84d18f06 | 3187 | if (local_err) { |
cf8f2426 | 3188 | error_propagate(errp, local_err); |
5a7e7a0b | 3189 | goto out; |
d9b902db PB |
3190 | } |
3191 | ||
e6641719 | 3192 | options = qdict_new(); |
faecd40a | 3193 | if (arg->has_node_name) { |
46f5ac20 | 3194 | qdict_put_str(options, "node-name", arg->node_name); |
4c828dc6 | 3195 | } |
e6641719 | 3196 | if (format) { |
46f5ac20 | 3197 | qdict_put_str(options, "driver", format); |
e6641719 | 3198 | } |
4c828dc6 | 3199 | |
b812f671 PB |
3200 | /* Mirroring takes care of copy-on-write using the source's backing |
3201 | * file. | |
3202 | */ | |
2a32c6e8 | 3203 | target_bs = bdrv_open(arg->target, NULL, options, flags, errp); |
5b363937 | 3204 | if (!target_bs) { |
5a7e7a0b | 3205 | goto out; |
d9b902db PB |
3206 | } |
3207 | ||
cdf3bc93 HR |
3208 | zero_target = (arg->sync == MIRROR_SYNC_MODE_FULL && |
3209 | (arg->mode == NEW_IMAGE_MODE_EXISTING || | |
3210 | !bdrv_has_zero_init(target_bs))); | |
3211 | ||
3ea67e08 SL |
3212 | |
3213 | /* Honor bdrv_try_set_aio_context() context acquisition requirements. */ | |
3214 | old_context = bdrv_get_aio_context(target_bs); | |
3215 | aio_context_release(aio_context); | |
3216 | aio_context_acquire(old_context); | |
3217 | ||
8ed7d42f KW |
3218 | ret = bdrv_try_set_aio_context(target_bs, aio_context, errp); |
3219 | if (ret < 0) { | |
3220 | bdrv_unref(target_bs); | |
3ea67e08 SL |
3221 | aio_context_release(old_context); |
3222 | return; | |
8ed7d42f | 3223 | } |
5a7e7a0b | 3224 | |
3ea67e08 SL |
3225 | aio_context_release(old_context); |
3226 | aio_context_acquire(aio_context); | |
3227 | ||
faecd40a EB |
3228 | blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs, |
3229 | arg->has_replaces, arg->replaces, arg->sync, | |
cdf3bc93 HR |
3230 | backing_mode, zero_target, |
3231 | arg->has_speed, arg->speed, | |
faecd40a EB |
3232 | arg->has_granularity, arg->granularity, |
3233 | arg->has_buf_size, arg->buf_size, | |
3234 | arg->has_on_source_error, arg->on_source_error, | |
3235 | arg->has_on_target_error, arg->on_target_error, | |
3236 | arg->has_unmap, arg->unmap, | |
6cdbceb1 | 3237 | false, NULL, |
481debaa | 3238 | arg->has_copy_mode, arg->copy_mode, |
a6b58ade JS |
3239 | arg->has_auto_finalize, arg->auto_finalize, |
3240 | arg->has_auto_dismiss, arg->auto_dismiss, | |
992861fb | 3241 | errp); |
e253f4b8 | 3242 | bdrv_unref(target_bs); |
5a7e7a0b SH |
3243 | out: |
3244 | aio_context_release(aio_context); | |
d9b902db PB |
3245 | } |
3246 | ||
71aa9867 AG |
3247 | void qmp_blockdev_mirror(bool has_job_id, const char *job_id, |
3248 | const char *device, const char *target, | |
df92562e FZ |
3249 | bool has_replaces, const char *replaces, |
3250 | MirrorSyncMode sync, | |
3251 | bool has_speed, int64_t speed, | |
3252 | bool has_granularity, uint32_t granularity, | |
3253 | bool has_buf_size, int64_t buf_size, | |
3254 | bool has_on_source_error, | |
3255 | BlockdevOnError on_source_error, | |
3256 | bool has_on_target_error, | |
3257 | BlockdevOnError on_target_error, | |
6cdbceb1 KW |
3258 | bool has_filter_node_name, |
3259 | const char *filter_node_name, | |
481debaa | 3260 | bool has_copy_mode, MirrorCopyMode copy_mode, |
a6b58ade JS |
3261 | bool has_auto_finalize, bool auto_finalize, |
3262 | bool has_auto_dismiss, bool auto_dismiss, | |
df92562e FZ |
3263 | Error **errp) |
3264 | { | |
3265 | BlockDriverState *bs; | |
df92562e FZ |
3266 | BlockDriverState *target_bs; |
3267 | AioContext *aio_context; | |
3ea67e08 | 3268 | AioContext *old_context; |
274fccee | 3269 | BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN; |
cdf3bc93 | 3270 | bool zero_target; |
8ed7d42f | 3271 | int ret; |
df92562e | 3272 | |
07eec652 | 3273 | bs = qmp_get_root_bs(device, errp); |
df92562e | 3274 | if (!bs) { |
df92562e FZ |
3275 | return; |
3276 | } | |
3277 | ||
3278 | target_bs = bdrv_lookup_bs(target, target, errp); | |
3279 | if (!target_bs) { | |
3280 | return; | |
3281 | } | |
3282 | ||
cdf3bc93 HR |
3283 | zero_target = (sync == MIRROR_SYNC_MODE_FULL); |
3284 | ||
3ea67e08 SL |
3285 | /* Honor bdrv_try_set_aio_context() context acquisition requirements. */ |
3286 | old_context = bdrv_get_aio_context(target_bs); | |
df92562e | 3287 | aio_context = bdrv_get_aio_context(bs); |
3ea67e08 | 3288 | aio_context_acquire(old_context); |
df92562e | 3289 | |
8ed7d42f | 3290 | ret = bdrv_try_set_aio_context(target_bs, aio_context, errp); |
3ea67e08 SL |
3291 | |
3292 | aio_context_release(old_context); | |
3293 | aio_context_acquire(aio_context); | |
3294 | ||
8ed7d42f KW |
3295 | if (ret < 0) { |
3296 | goto out; | |
3297 | } | |
df92562e | 3298 | |
71aa9867 | 3299 | blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs, |
274fccee | 3300 | has_replaces, replaces, sync, backing_mode, |
cdf3bc93 | 3301 | zero_target, has_speed, speed, |
df92562e FZ |
3302 | has_granularity, granularity, |
3303 | has_buf_size, buf_size, | |
3304 | has_on_source_error, on_source_error, | |
3305 | has_on_target_error, on_target_error, | |
3306 | true, true, | |
6cdbceb1 | 3307 | has_filter_node_name, filter_node_name, |
481debaa | 3308 | has_copy_mode, copy_mode, |
a6b58ade JS |
3309 | has_auto_finalize, auto_finalize, |
3310 | has_auto_dismiss, auto_dismiss, | |
992861fb | 3311 | errp); |
8ed7d42f | 3312 | out: |
df92562e FZ |
3313 | aio_context_release(aio_context); |
3314 | } | |
3315 | ||
3ddf3efe AG |
3316 | /* Get a block job using its ID and acquire its AioContext */ |
3317 | static BlockJob *find_block_job(const char *id, AioContext **aio_context, | |
24d6bffe | 3318 | Error **errp) |
2d47c6e9 | 3319 | { |
3ddf3efe | 3320 | BlockJob *job; |
2d47c6e9 | 3321 | |
3ddf3efe | 3322 | assert(id != NULL); |
5433c24f | 3323 | |
3ddf3efe | 3324 | *aio_context = NULL; |
3d948cdf | 3325 | |
3ddf3efe | 3326 | job = block_job_get(id); |
5433c24f | 3327 | |
3ddf3efe AG |
3328 | if (!job) { |
3329 | error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE, | |
3330 | "Block job '%s' not found", id); | |
3331 | return NULL; | |
2d47c6e9 | 3332 | } |
3d948cdf | 3333 | |
df9a3165 | 3334 | *aio_context = block_job_get_aio_context(job); |
3ddf3efe | 3335 | aio_context_acquire(*aio_context); |
3d948cdf | 3336 | |
3ddf3efe | 3337 | return job; |
2d47c6e9 SH |
3338 | } |
3339 | ||
882ec7ce | 3340 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
2d47c6e9 | 3341 | { |
3d948cdf | 3342 | AioContext *aio_context; |
24d6bffe | 3343 | BlockJob *job = find_block_job(device, &aio_context, errp); |
2d47c6e9 SH |
3344 | |
3345 | if (!job) { | |
2d47c6e9 SH |
3346 | return; |
3347 | } | |
3348 | ||
882ec7ce | 3349 | block_job_set_speed(job, speed, errp); |
3d948cdf | 3350 | aio_context_release(aio_context); |
2d47c6e9 | 3351 | } |
370521a1 | 3352 | |
6e37fb81 PB |
3353 | void qmp_block_job_cancel(const char *device, |
3354 | bool has_force, bool force, Error **errp) | |
370521a1 | 3355 | { |
3d948cdf | 3356 | AioContext *aio_context; |
24d6bffe | 3357 | BlockJob *job = find_block_job(device, &aio_context, errp); |
6e37fb81 | 3358 | |
370521a1 | 3359 | if (!job) { |
370521a1 SH |
3360 | return; |
3361 | } | |
3d948cdf SH |
3362 | |
3363 | if (!has_force) { | |
3364 | force = false; | |
3365 | } | |
3366 | ||
b15de828 | 3367 | if (job_user_paused(&job->job) && !force) { |
f231b88d CR |
3368 | error_setg(errp, "The block job for device '%s' is currently paused", |
3369 | device); | |
3d948cdf | 3370 | goto out; |
8acc72a4 | 3371 | } |
370521a1 SH |
3372 | |
3373 | trace_qmp_block_job_cancel(job); | |
3d70ff53 | 3374 | job_user_cancel(&job->job, force, errp); |
3d948cdf SH |
3375 | out: |
3376 | aio_context_release(aio_context); | |
370521a1 | 3377 | } |
fb5458cd | 3378 | |
6e37fb81 PB |
3379 | void qmp_block_job_pause(const char *device, Error **errp) |
3380 | { | |
3d948cdf | 3381 | AioContext *aio_context; |
24d6bffe | 3382 | BlockJob *job = find_block_job(device, &aio_context, errp); |
6e37fb81 | 3383 | |
0ec4dfb8 | 3384 | if (!job) { |
6e37fb81 PB |
3385 | return; |
3386 | } | |
3387 | ||
3388 | trace_qmp_block_job_pause(job); | |
b15de828 | 3389 | job_user_pause(&job->job, errp); |
3d948cdf | 3390 | aio_context_release(aio_context); |
6e37fb81 PB |
3391 | } |
3392 | ||
3393 | void qmp_block_job_resume(const char *device, Error **errp) | |
3394 | { | |
3d948cdf | 3395 | AioContext *aio_context; |
24d6bffe | 3396 | BlockJob *job = find_block_job(device, &aio_context, errp); |
6e37fb81 | 3397 | |
0ec4dfb8 | 3398 | if (!job) { |
6e37fb81 PB |
3399 | return; |
3400 | } | |
3401 | ||
3402 | trace_qmp_block_job_resume(job); | |
b15de828 | 3403 | job_user_resume(&job->job, errp); |
3d948cdf | 3404 | aio_context_release(aio_context); |
6e37fb81 PB |
3405 | } |
3406 | ||
aeae883b PB |
3407 | void qmp_block_job_complete(const char *device, Error **errp) |
3408 | { | |
3d948cdf | 3409 | AioContext *aio_context; |
24d6bffe | 3410 | BlockJob *job = find_block_job(device, &aio_context, errp); |
aeae883b PB |
3411 | |
3412 | if (!job) { | |
aeae883b PB |
3413 | return; |
3414 | } | |
3415 | ||
3416 | trace_qmp_block_job_complete(job); | |
3453d972 | 3417 | job_complete(&job->job, errp); |
3d948cdf | 3418 | aio_context_release(aio_context); |
aeae883b PB |
3419 | } |
3420 | ||
11b61fbc JS |
3421 | void qmp_block_job_finalize(const char *id, Error **errp) |
3422 | { | |
3423 | AioContext *aio_context; | |
3424 | BlockJob *job = find_block_job(id, &aio_context, errp); | |
3425 | ||
3426 | if (!job) { | |
3427 | return; | |
3428 | } | |
3429 | ||
3430 | trace_qmp_block_job_finalize(job); | |
b660a84b | 3431 | job_ref(&job->job); |
7eaa8fb5 | 3432 | job_finalize(&job->job, errp); |
b660a84b SR |
3433 | |
3434 | /* | |
3435 | * Job's context might have changed via job_finalize (and job_txn_apply | |
3436 | * automatically acquires the new one), so make sure we release the correct | |
3437 | * one. | |
3438 | */ | |
df9a3165 | 3439 | aio_context = block_job_get_aio_context(job); |
b660a84b | 3440 | job_unref(&job->job); |
11b61fbc JS |
3441 | aio_context_release(aio_context); |
3442 | } | |
3443 | ||
75f71059 JS |
3444 | void qmp_block_job_dismiss(const char *id, Error **errp) |
3445 | { | |
3446 | AioContext *aio_context; | |
5f9a6a08 KW |
3447 | BlockJob *bjob = find_block_job(id, &aio_context, errp); |
3448 | Job *job; | |
75f71059 | 3449 | |
5f9a6a08 | 3450 | if (!bjob) { |
75f71059 JS |
3451 | return; |
3452 | } | |
3453 | ||
5f9a6a08 KW |
3454 | trace_qmp_block_job_dismiss(bjob); |
3455 | job = &bjob->job; | |
3456 | job_dismiss(&job, errp); | |
75f71059 JS |
3457 | aio_context_release(aio_context); |
3458 | } | |
3459 | ||
fa40e656 JC |
3460 | void qmp_change_backing_file(const char *device, |
3461 | const char *image_node_name, | |
3462 | const char *backing_file, | |
3463 | Error **errp) | |
3464 | { | |
3465 | BlockDriverState *bs = NULL; | |
729962f6 | 3466 | AioContext *aio_context; |
fa40e656 JC |
3467 | BlockDriverState *image_bs = NULL; |
3468 | Error *local_err = NULL; | |
3469 | bool ro; | |
fa40e656 JC |
3470 | int ret; |
3471 | ||
7b5dca3f KW |
3472 | bs = qmp_get_root_bs(device, errp); |
3473 | if (!bs) { | |
fa40e656 JC |
3474 | return; |
3475 | } | |
3476 | ||
7b5dca3f | 3477 | aio_context = bdrv_get_aio_context(bs); |
729962f6 SH |
3478 | aio_context_acquire(aio_context); |
3479 | ||
fa40e656 JC |
3480 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); |
3481 | if (local_err) { | |
3482 | error_propagate(errp, local_err); | |
729962f6 | 3483 | goto out; |
fa40e656 JC |
3484 | } |
3485 | ||
3486 | if (!image_bs) { | |
3487 | error_setg(errp, "image file not found"); | |
729962f6 | 3488 | goto out; |
fa40e656 JC |
3489 | } |
3490 | ||
3491 | if (bdrv_find_base(image_bs) == image_bs) { | |
3492 | error_setg(errp, "not allowing backing file change on an image " | |
3493 | "without a backing file"); | |
729962f6 | 3494 | goto out; |
fa40e656 JC |
3495 | } |
3496 | ||
3497 | /* even though we are not necessarily operating on bs, we need it to | |
3498 | * determine if block ops are currently prohibited on the chain */ | |
3499 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { | |
729962f6 | 3500 | goto out; |
fa40e656 JC |
3501 | } |
3502 | ||
3503 | /* final sanity check */ | |
3504 | if (!bdrv_chain_contains(bs, image_bs)) { | |
3505 | error_setg(errp, "'%s' and image file are not in the same chain", | |
3506 | device); | |
729962f6 | 3507 | goto out; |
fa40e656 JC |
3508 | } |
3509 | ||
3510 | /* if not r/w, reopen to make r/w */ | |
fa40e656 JC |
3511 | ro = bdrv_is_read_only(image_bs); |
3512 | ||
3513 | if (ro) { | |
051a60f6 | 3514 | if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) { |
729962f6 | 3515 | goto out; |
fa40e656 JC |
3516 | } |
3517 | } | |
3518 | ||
3519 | ret = bdrv_change_backing_file(image_bs, backing_file, | |
e54ee1b3 EB |
3520 | image_bs->drv ? image_bs->drv->format_name : "", |
3521 | false); | |
fa40e656 JC |
3522 | |
3523 | if (ret < 0) { | |
3524 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'", | |
3525 | backing_file); | |
3526 | /* don't exit here, so we can try to restore open flags if | |
3527 | * appropriate */ | |
3528 | } | |
3529 | ||
3530 | if (ro) { | |
992861fb | 3531 | bdrv_reopen_set_read_only(image_bs, true, errp); |
fa40e656 | 3532 | } |
729962f6 SH |
3533 | |
3534 | out: | |
3535 | aio_context_release(aio_context); | |
fa40e656 JC |
3536 | } |
3537 | ||
d26c9a15 KW |
3538 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) |
3539 | { | |
be4b67bc | 3540 | BlockDriverState *bs; |
d26c9a15 | 3541 | QObject *obj; |
7d5e199a | 3542 | Visitor *v = qobject_output_visitor_new(&obj); |
d26c9a15 | 3543 | QDict *qdict; |
d26c9a15 | 3544 | |
1f584248 | 3545 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); |
3b098d56 | 3546 | visit_complete(v, &obj); |
7dc847eb | 3547 | qdict = qobject_to(QDict, obj); |
d26c9a15 KW |
3548 | |
3549 | qdict_flatten(qdict); | |
3550 | ||
9ec8873e KW |
3551 | if (!qdict_get_try_str(qdict, "node-name")) { |
3552 | error_setg(errp, "'node-name' must be specified for the root node"); | |
3553 | goto fail; | |
3554 | } | |
9c4218e9 | 3555 | |
9ec8873e KW |
3556 | bs = bds_tree_init(qdict, errp); |
3557 | if (!bs) { | |
3558 | goto fail; | |
d26c9a15 KW |
3559 | } |
3560 | ||
89802d5a | 3561 | bdrv_set_monitor_owned(bs); |
9ec8873e | 3562 | |
d26c9a15 | 3563 | fail: |
3b098d56 | 3564 | visit_free(v); |
d26c9a15 KW |
3565 | } |
3566 | ||
e60edf69 | 3567 | void qmp_blockdev_reopen(BlockdevOptionsList *reopen_list, Error **errp) |
3908b7a8 AG |
3568 | { |
3569 | BlockReopenQueue *queue = NULL; | |
3570 | GSList *drained = NULL; | |
aba8205b | 3571 | GSList *p; |
3908b7a8 AG |
3572 | |
3573 | /* Add each one of the BDS that we want to reopen to the queue */ | |
3574 | for (; reopen_list != NULL; reopen_list = reopen_list->next) { | |
3575 | BlockdevOptions *options = reopen_list->value; | |
3576 | BlockDriverState *bs; | |
3577 | AioContext *ctx; | |
3578 | QObject *obj; | |
3579 | Visitor *v; | |
3580 | QDict *qdict; | |
3581 | ||
3582 | /* Check for the selected node name */ | |
3583 | if (!options->has_node_name) { | |
3584 | error_setg(errp, "node-name not specified"); | |
3585 | goto fail; | |
3586 | } | |
1479c730 | 3587 | |
3908b7a8 AG |
3588 | bs = bdrv_find_node(options->node_name); |
3589 | if (!bs) { | |
3590 | error_setg(errp, "Failed to find node with node-name='%s'", | |
3591 | options->node_name); | |
3592 | goto fail; | |
3593 | } | |
1479c730 | 3594 | |
3908b7a8 AG |
3595 | /* Put all options in a QDict and flatten it */ |
3596 | v = qobject_output_visitor_new(&obj); | |
3597 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); | |
3598 | visit_complete(v, &obj); | |
3599 | visit_free(v); | |
1479c730 | 3600 | |
3908b7a8 | 3601 | qdict = qobject_to(QDict, obj); |
1479c730 | 3602 | |
3908b7a8 | 3603 | qdict_flatten(qdict); |
1479c730 | 3604 | |
3908b7a8 AG |
3605 | ctx = bdrv_get_aio_context(bs); |
3606 | aio_context_acquire(ctx); | |
6cf42ca2 | 3607 | |
3908b7a8 AG |
3608 | bdrv_subtree_drained_begin(bs); |
3609 | queue = bdrv_reopen_queue(queue, bs, qdict, false); | |
3610 | drained = g_slist_prepend(drained, bs); | |
6cf42ca2 | 3611 | |
3908b7a8 AG |
3612 | aio_context_release(ctx); |
3613 | } | |
3614 | ||
3615 | /* Perform the reopen operation */ | |
3616 | bdrv_reopen_multiple(queue, errp); | |
3617 | queue = NULL; | |
1479c730 AG |
3618 | |
3619 | fail: | |
3908b7a8 | 3620 | bdrv_reopen_queue_free(queue); |
aba8205b KW |
3621 | for (p = drained; p; p = p->next) { |
3622 | BlockDriverState *bs = p->data; | |
3623 | AioContext *ctx = bdrv_get_aio_context(bs); | |
3624 | ||
3625 | aio_context_acquire(ctx); | |
3626 | bdrv_subtree_drained_end(bs); | |
3627 | aio_context_release(ctx); | |
3628 | } | |
3629 | g_slist_free(drained); | |
1479c730 AG |
3630 | } |
3631 | ||
79b7a77e | 3632 | void qmp_blockdev_del(const char *node_name, Error **errp) |
81b936ae AG |
3633 | { |
3634 | AioContext *aio_context; | |
81b936ae AG |
3635 | BlockDriverState *bs; |
3636 | ||
b4ad82aa EGE |
3637 | GLOBAL_STATE_CODE(); |
3638 | ||
9ec8873e KW |
3639 | bs = bdrv_find_node(node_name); |
3640 | if (!bs) { | |
ef2e38a1 | 3641 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); |
81b936ae AG |
3642 | return; |
3643 | } | |
9ec8873e KW |
3644 | if (bdrv_has_blk(bs)) { |
3645 | error_setg(errp, "Node %s is in use", node_name); | |
3646 | return; | |
81b936ae | 3647 | } |
9ec8873e | 3648 | aio_context = bdrv_get_aio_context(bs); |
81b936ae AG |
3649 | aio_context_acquire(aio_context); |
3650 | ||
9ec8873e KW |
3651 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) { |
3652 | goto out; | |
3653 | } | |
9c4218e9 | 3654 | |
70537ed5 | 3655 | if (!QTAILQ_IN_USE(bs, monitor_list)) { |
9ec8873e KW |
3656 | error_setg(errp, "Node %s is not owned by the monitor", |
3657 | bs->node_name); | |
3658 | goto out; | |
81b936ae AG |
3659 | } |
3660 | ||
9ec8873e KW |
3661 | if (bs->refcnt > 1) { |
3662 | error_setg(errp, "Block device %s is in use", | |
3663 | bdrv_get_device_or_node_name(bs)); | |
3664 | goto out; | |
81b936ae AG |
3665 | } |
3666 | ||
9ec8873e KW |
3667 | QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); |
3668 | bdrv_unref(bs); | |
3669 | ||
81b936ae AG |
3670 | out: |
3671 | aio_context_release(aio_context); | |
3672 | } | |
3673 | ||
7f821597 WC |
3674 | static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs, |
3675 | const char *child_name) | |
3676 | { | |
3677 | BdrvChild *child; | |
3678 | ||
3679 | QLIST_FOREACH(child, &parent_bs->children, next) { | |
3680 | if (strcmp(child->name, child_name) == 0) { | |
3681 | return child; | |
3682 | } | |
3683 | } | |
3684 | ||
3685 | return NULL; | |
3686 | } | |
3687 | ||
3688 | void qmp_x_blockdev_change(const char *parent, bool has_child, | |
3689 | const char *child, bool has_node, | |
3690 | const char *node, Error **errp) | |
3691 | { | |
3692 | BlockDriverState *parent_bs, *new_bs = NULL; | |
3693 | BdrvChild *p_child; | |
3694 | ||
3695 | parent_bs = bdrv_lookup_bs(parent, parent, errp); | |
3696 | if (!parent_bs) { | |
3697 | return; | |
3698 | } | |
3699 | ||
3700 | if (has_child == has_node) { | |
3701 | if (has_child) { | |
3702 | error_setg(errp, "The parameters child and node are in conflict"); | |
3703 | } else { | |
3704 | error_setg(errp, "Either child or node must be specified"); | |
3705 | } | |
3706 | return; | |
3707 | } | |
3708 | ||
3709 | if (has_child) { | |
3710 | p_child = bdrv_find_child(parent_bs, child); | |
3711 | if (!p_child) { | |
3712 | error_setg(errp, "Node '%s' does not have child '%s'", | |
3713 | parent, child); | |
3714 | return; | |
3715 | } | |
3716 | bdrv_del_child(parent_bs, p_child, errp); | |
3717 | } | |
3718 | ||
3719 | if (has_node) { | |
3720 | new_bs = bdrv_find_node(node); | |
3721 | if (!new_bs) { | |
3722 | error_setg(errp, "Node '%s' not found", node); | |
3723 | return; | |
3724 | } | |
3725 | bdrv_add_child(parent_bs, new_bs, errp); | |
3726 | } | |
3727 | } | |
3728 | ||
fea68bb6 | 3729 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
fb5458cd | 3730 | { |
c3033fd3 | 3731 | BlockJobInfoList *head = NULL, **tail = &head; |
f0f55ded | 3732 | BlockJob *job; |
fb5458cd | 3733 | |
f0f55ded | 3734 | for (job = block_job_next(NULL); job; job = block_job_next(job)) { |
c3033fd3 | 3735 | BlockJobInfo *value; |
559b935f | 3736 | AioContext *aio_context; |
69691e72 | 3737 | |
559b935f JS |
3738 | if (block_job_is_internal(job)) { |
3739 | continue; | |
3740 | } | |
df9a3165 | 3741 | aio_context = block_job_get_aio_context(job); |
69691e72 | 3742 | aio_context_acquire(aio_context); |
c3033fd3 | 3743 | value = block_job_query(job, errp); |
69691e72 | 3744 | aio_context_release(aio_context); |
c3033fd3 | 3745 | if (!value) { |
559b935f JS |
3746 | qapi_free_BlockJobInfoList(head); |
3747 | return NULL; | |
3748 | } | |
c3033fd3 | 3749 | QAPI_LIST_APPEND(tail, value); |
fb5458cd | 3750 | } |
fb5458cd | 3751 | |
fea68bb6 | 3752 | return head; |
fb5458cd | 3753 | } |
4d454574 | 3754 | |
ca00bbb1 | 3755 | void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread, |
882e9b89 | 3756 | bool has_force, bool force, Error **errp) |
ca00bbb1 SH |
3757 | { |
3758 | AioContext *old_context; | |
3759 | AioContext *new_context; | |
3760 | BlockDriverState *bs; | |
3761 | ||
3762 | bs = bdrv_find_node(node_name); | |
3763 | if (!bs) { | |
ef2e38a1 | 3764 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); |
ca00bbb1 SH |
3765 | return; |
3766 | } | |
3767 | ||
882e9b89 SH |
3768 | /* Protects against accidents. */ |
3769 | if (!(has_force && force) && bdrv_has_blk(bs)) { | |
3770 | error_setg(errp, "Node %s is associated with a BlockBackend and could " | |
3771 | "be in use (use force=true to override this check)", | |
3772 | node_name); | |
ca00bbb1 SH |
3773 | return; |
3774 | } | |
3775 | ||
3776 | if (iothread->type == QTYPE_QSTRING) { | |
3777 | IOThread *obj = iothread_by_id(iothread->u.s); | |
3778 | if (!obj) { | |
3779 | error_setg(errp, "Cannot find iothread %s", iothread->u.s); | |
3780 | return; | |
3781 | } | |
3782 | ||
3783 | new_context = iothread_get_aio_context(obj); | |
3784 | } else { | |
3785 | new_context = qemu_get_aio_context(); | |
3786 | } | |
3787 | ||
3788 | old_context = bdrv_get_aio_context(bs); | |
3789 | aio_context_acquire(old_context); | |
3790 | ||
8ed7d42f | 3791 | bdrv_try_set_aio_context(bs, new_context, errp); |
ca00bbb1 SH |
3792 | |
3793 | aio_context_release(old_context); | |
3794 | } | |
3795 | ||
0006383e | 3796 | QemuOptsList qemu_common_drive_opts = { |
4d454574 | 3797 | .name = "drive", |
0006383e | 3798 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
4d454574 PB |
3799 | .desc = { |
3800 | { | |
4d454574 PB |
3801 | .name = "snapshot", |
3802 | .type = QEMU_OPT_BOOL, | |
3803 | .help = "enable/disable snapshot mode", | |
4d454574 PB |
3804 | },{ |
3805 | .name = "aio", | |
3806 | .type = QEMU_OPT_STRING, | |
f80f2673 | 3807 | .help = "host AIO implementation (threads, native, io_uring)", |
e4b24b49 KW |
3808 | },{ |
3809 | .name = BDRV_OPT_CACHE_WB, | |
3810 | .type = QEMU_OPT_BOOL, | |
3811 | .help = "Enable writeback mode", | |
4d454574 PB |
3812 | },{ |
3813 | .name = "format", | |
3814 | .type = QEMU_OPT_STRING, | |
3815 | .help = "disk format (raw, qcow2, ...)", | |
4d454574 PB |
3816 | },{ |
3817 | .name = "rerror", | |
3818 | .type = QEMU_OPT_STRING, | |
3819 | .help = "read error action", | |
3820 | },{ | |
3821 | .name = "werror", | |
3822 | .type = QEMU_OPT_STRING, | |
3823 | .help = "write error action", | |
4d454574 | 3824 | },{ |
4e200cf8 | 3825 | .name = BDRV_OPT_READ_ONLY, |
4d454574 PB |
3826 | .type = QEMU_OPT_BOOL, |
3827 | .help = "open drive file as read-only", | |
a2a7862c PJ |
3828 | }, |
3829 | ||
3830 | THROTTLE_OPTS, | |
3831 | ||
3832 | { | |
76f4afb4 AG |
3833 | .name = "throttling.group", |
3834 | .type = QEMU_OPT_STRING, | |
3835 | .help = "name of the block throttling group", | |
4d454574 PB |
3836 | },{ |
3837 | .name = "copy-on-read", | |
3838 | .type = QEMU_OPT_BOOL, | |
3839 | .help = "copy read data from backing file into image file", | |
465bee1d PL |
3840 | },{ |
3841 | .name = "detect-zeroes", | |
3842 | .type = QEMU_OPT_STRING, | |
3843 | .help = "try to optimize zero writes (off, on, unmap)", | |
362e9299 AG |
3844 | },{ |
3845 | .name = "stats-account-invalid", | |
3846 | .type = QEMU_OPT_BOOL, | |
3847 | .help = "whether to account for invalid I/O operations " | |
3848 | "in the statistics", | |
3849 | },{ | |
3850 | .name = "stats-account-failed", | |
3851 | .type = QEMU_OPT_BOOL, | |
3852 | .help = "whether to account for failed I/O operations " | |
3853 | "in the statistics", | |
4d454574 PB |
3854 | }, |
3855 | { /* end of list */ } | |
3856 | }, | |
3857 | }; | |
0006383e KW |
3858 | |
3859 | QemuOptsList qemu_drive_opts = { | |
3860 | .name = "drive", | |
3861 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
3862 | .desc = { | |
492fdc6f KW |
3863 | /* |
3864 | * no elements => accept any params | |
3865 | * validation will happen later | |
3866 | */ | |
0006383e KW |
3867 | { /* end of list */ } |
3868 | }, | |
3869 | }; |