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666daa68 MA |
1 | /* |
2 | * QEMU host block devices | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * This work is licensed under the terms of the GNU GPL, version 2 or | |
7 | * later. See the COPYING file in the top-level directory. | |
3618a094 MA |
8 | * |
9 | * This file incorporates work covered by the following copyright and | |
10 | * permission notice: | |
11 | * | |
12 | * Copyright (c) 2003-2008 Fabrice Bellard | |
13 | * | |
14 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
15 | * of this software and associated documentation files (the "Software"), to deal | |
16 | * in the Software without restriction, including without limitation the rights | |
17 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
18 | * copies of the Software, and to permit persons to whom the Software is | |
19 | * furnished to do so, subject to the following conditions: | |
20 | * | |
21 | * The above copyright notice and this permission notice shall be included in | |
22 | * all copies or substantial portions of the Software. | |
23 | * | |
24 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
25 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
26 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
27 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
28 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
29 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
30 | * THE SOFTWARE. | |
666daa68 MA |
31 | */ |
32 | ||
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" |
e2c1c34f | 38 | #include "block/dirty-bitmap.h" |
609f45ea | 39 | #include "block/qdict.h" |
76f4afb4 | 40 | #include "block/throttle-groups.h" |
83c9089e | 41 | #include "monitor/monitor.h" |
d49b6836 | 42 | #include "qemu/error-report.h" |
1de7afc9 | 43 | #include "qemu/option.h" |
cdcd4361 | 44 | #include "qemu/qemu-print.h" |
1de7afc9 | 45 | #include "qemu/config-file.h" |
9af23989 MA |
46 | #include "qapi/qapi-commands-block.h" |
47 | #include "qapi/qapi-commands-transaction.h" | |
48 | #include "qapi/qapi-visit-block-core.h" | |
452fcdbc | 49 | #include "qapi/qmp/qdict.h" |
15280c36 | 50 | #include "qapi/qmp/qnum.h" |
6b673957 | 51 | #include "qapi/qmp/qstring.h" |
e688df6b | 52 | #include "qapi/error.h" |
cc7a8ea7 | 53 | #include "qapi/qmp/qerror.h" |
47e6b297 | 54 | #include "qapi/qmp/qlist.h" |
b3db211f | 55 | #include "qapi/qobject-output-visitor.h" |
9c17d615 | 56 | #include "sysemu/sysemu.h" |
ca00bbb1 | 57 | #include "sysemu/iothread.h" |
737e150e | 58 | #include "block/block_int.h" |
0ab8ed18 | 59 | #include "block/trace.h" |
54d31236 | 60 | #include "sysemu/runstate.h" |
b39847a5 | 61 | #include "sysemu/replay.h" |
f348b6d1 VB |
62 | #include "qemu/cutils.h" |
63 | #include "qemu/help_option.h" | |
db725815 | 64 | #include "qemu/main-loop.h" |
a2a7862c | 65 | #include "qemu/throttle-options.h" |
666daa68 | 66 | |
ebc2752b | 67 | /* Protected by BQL */ |
89802d5a | 68 | QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states = |
9c4218e9 HR |
69 | QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states); |
70 | ||
89802d5a ML |
71 | void bdrv_set_monitor_owned(BlockDriverState *bs) |
72 | { | |
b4ad82aa | 73 | GLOBAL_STATE_CODE(); |
89802d5a ML |
74 | QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list); |
75 | } | |
76 | ||
1960966d MA |
77 | static const char *const if_name[IF_COUNT] = { |
78 | [IF_NONE] = "none", | |
79 | [IF_IDE] = "ide", | |
80 | [IF_SCSI] = "scsi", | |
81 | [IF_FLOPPY] = "floppy", | |
82 | [IF_PFLASH] = "pflash", | |
83 | [IF_MTD] = "mtd", | |
84 | [IF_SD] = "sd", | |
85 | [IF_VIRTIO] = "virtio", | |
86 | [IF_XEN] = "xen", | |
87 | }; | |
88 | ||
21dff8cf | 89 | static int if_max_devs[IF_COUNT] = { |
27d6bf40 MA |
90 | /* |
91 | * Do not change these numbers! They govern how drive option | |
92 | * index maps to unit and bus. That mapping is ABI. | |
93 | * | |
547cb157 | 94 | * All controllers used to implement if=T drives need to support |
27d6bf40 MA |
95 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. |
96 | * Otherwise, some index values map to "impossible" bus, unit | |
97 | * values. | |
98 | * | |
99 | * For instance, if you change [IF_SCSI] to 255, -drive | |
100 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
101 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
102 | * the drive can't be set up. Regression. | |
103 | */ | |
104 | [IF_IDE] = 2, | |
105 | [IF_SCSI] = 7, | |
1960966d MA |
106 | }; |
107 | ||
21dff8cf JS |
108 | /** |
109 | * Boards may call this to offer board-by-board overrides | |
110 | * of the default, global values. | |
111 | */ | |
112 | void override_max_devs(BlockInterfaceType type, int max_devs) | |
113 | { | |
18e46a03 | 114 | BlockBackend *blk; |
21dff8cf JS |
115 | DriveInfo *dinfo; |
116 | ||
c5be7445 EGE |
117 | GLOBAL_STATE_CODE(); |
118 | ||
21dff8cf JS |
119 | if (max_devs <= 0) { |
120 | return; | |
121 | } | |
122 | ||
18e46a03 MA |
123 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
124 | dinfo = blk_legacy_dinfo(blk); | |
21dff8cf JS |
125 | if (dinfo->type == type) { |
126 | fprintf(stderr, "Cannot override units-per-bus property of" | |
127 | " the %s interface, because a drive of that type has" | |
128 | " already been added.\n", if_name[type]); | |
129 | g_assert_not_reached(); | |
130 | } | |
131 | } | |
132 | ||
133 | if_max_devs[type] = max_devs; | |
134 | } | |
135 | ||
14bafc54 MA |
136 | /* |
137 | * We automatically delete the drive when a device using it gets | |
138 | * unplugged. Questionable feature, but we can't just drop it. | |
139 | * Device models call blockdev_mark_auto_del() to schedule the | |
140 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
141 | * when deletion is actually safe. | |
142 | */ | |
4be74634 | 143 | void blockdev_mark_auto_del(BlockBackend *blk) |
14bafc54 | 144 | { |
18e46a03 | 145 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
8164102f | 146 | BlockJob *job; |
14bafc54 | 147 | |
c5be7445 EGE |
148 | GLOBAL_STATE_CODE(); |
149 | ||
26f8b3a8 | 150 | if (!dinfo) { |
2d246f01 KW |
151 | return; |
152 | } | |
153 | ||
880eeec6 EGE |
154 | JOB_LOCK_GUARD(); |
155 | ||
e2626874 KW |
156 | do { |
157 | job = block_job_next_locked(NULL); | |
158 | while (job && (job->job.cancelled || | |
159 | job->job.deferred_to_main_loop || | |
160 | !block_job_has_bdrv(job, blk_bs(blk)))) | |
161 | { | |
162 | job = block_job_next_locked(job); | |
163 | } | |
164 | if (job) { | |
165 | /* | |
166 | * This drops the job lock temporarily and polls, so we need to | |
167 | * restart processing the list from the start after this. | |
168 | */ | |
880eeec6 | 169 | job_cancel_locked(&job->job, false); |
8164102f | 170 | } |
e2626874 | 171 | } while (job); |
91fddb0d | 172 | |
26f8b3a8 | 173 | dinfo->auto_del = 1; |
14bafc54 MA |
174 | } |
175 | ||
4be74634 | 176 | void blockdev_auto_del(BlockBackend *blk) |
14bafc54 | 177 | { |
18e46a03 | 178 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
c5be7445 | 179 | GLOBAL_STATE_CODE(); |
14bafc54 | 180 | |
0fc0f1fa | 181 | if (dinfo && dinfo->auto_del) { |
efaa7c4e | 182 | monitor_remove_blk(blk); |
b9fe8a7a | 183 | blk_unref(blk); |
14bafc54 MA |
184 | } |
185 | } | |
186 | ||
505a7fb1 MA |
187 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
188 | { | |
189 | int max_devs = if_max_devs[type]; | |
190 | return max_devs ? index / max_devs : 0; | |
191 | } | |
192 | ||
193 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
194 | { | |
195 | int max_devs = if_max_devs[type]; | |
196 | return max_devs ? index % max_devs : index; | |
197 | } | |
198 | ||
2292ddae | 199 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
5645b0f4 | 200 | const char *optstr) |
666daa68 | 201 | { |
666daa68 MA |
202 | QemuOpts *opts; |
203 | ||
c5be7445 EGE |
204 | GLOBAL_STATE_CODE(); |
205 | ||
cc67f28e | 206 | opts = qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false); |
666daa68 MA |
207 | if (!opts) { |
208 | return NULL; | |
209 | } | |
2292ddae | 210 | if (type != IF_DEFAULT) { |
f43e47db | 211 | qemu_opt_set(opts, "if", if_name[type], &error_abort); |
2292ddae MA |
212 | } |
213 | if (index >= 0) { | |
a8b18f8f | 214 | qemu_opt_set_number(opts, "index", index, &error_abort); |
2292ddae | 215 | } |
666daa68 | 216 | if (file) |
f43e47db | 217 | qemu_opt_set(opts, "file", file, &error_abort); |
666daa68 MA |
218 | return opts; |
219 | } | |
220 | ||
221 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
222 | { | |
18e46a03 | 223 | BlockBackend *blk; |
666daa68 MA |
224 | DriveInfo *dinfo; |
225 | ||
c5be7445 EGE |
226 | GLOBAL_STATE_CODE(); |
227 | ||
18e46a03 MA |
228 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
229 | dinfo = blk_legacy_dinfo(blk); | |
230 | if (dinfo && dinfo->type == type | |
231 | && dinfo->bus == bus && dinfo->unit == unit) { | |
666daa68 | 232 | return dinfo; |
18e46a03 | 233 | } |
666daa68 MA |
234 | } |
235 | ||
236 | return NULL; | |
237 | } | |
238 | ||
fe9f70a1 MA |
239 | /* |
240 | * Check board claimed all -drive that are meant to be claimed. | |
241 | * Fatal error if any remain unclaimed. | |
242 | */ | |
720b8dc0 | 243 | void drive_check_orphaned(void) |
a66c9dc7 | 244 | { |
18e46a03 | 245 | BlockBackend *blk; |
a66c9dc7 | 246 | DriveInfo *dinfo; |
664cc623 | 247 | Location loc; |
720b8dc0 | 248 | bool orphans = false; |
a66c9dc7 | 249 | |
c5be7445 EGE |
250 | GLOBAL_STATE_CODE(); |
251 | ||
18e46a03 MA |
252 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
253 | dinfo = blk_legacy_dinfo(blk); | |
fe9f70a1 MA |
254 | /* |
255 | * Ignore default drives, because we create certain default | |
256 | * drives unconditionally, then leave them unclaimed. Not the | |
257 | * users fault. | |
258 | * Ignore IF_VIRTIO, because it gets desugared into -device, | |
259 | * so we can leave failing to -device. | |
260 | * Ignore IF_NONE, because leaving unclaimed IF_NONE remains | |
261 | * available for device_add is a feature. | |
262 | */ | |
263 | if (dinfo->is_default || dinfo->type == IF_VIRTIO | |
264 | || dinfo->type == IF_NONE) { | |
a1b40bda MA |
265 | continue; |
266 | } | |
267 | if (!blk_get_attached_dev(blk)) { | |
664cc623 MA |
268 | loc_push_none(&loc); |
269 | qemu_opts_loc_restore(dinfo->opts); | |
720b8dc0 | 270 | error_report("machine type does not support" |
664cc623 MA |
271 | " if=%s,bus=%d,unit=%d", |
272 | if_name[dinfo->type], dinfo->bus, dinfo->unit); | |
273 | loc_pop(&loc); | |
720b8dc0 | 274 | orphans = true; |
a66c9dc7 JS |
275 | } |
276 | } | |
277 | ||
720b8dc0 MA |
278 | if (orphans) { |
279 | exit(1); | |
280 | } | |
a66c9dc7 JS |
281 | } |
282 | ||
f1bd51ac MA |
283 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
284 | { | |
c5be7445 | 285 | GLOBAL_STATE_CODE(); |
f1bd51ac MA |
286 | return drive_get(type, |
287 | drive_index_to_bus_id(type, index), | |
288 | drive_index_to_unit_id(type, index)); | |
289 | } | |
290 | ||
666daa68 MA |
291 | int drive_get_max_bus(BlockInterfaceType type) |
292 | { | |
293 | int max_bus; | |
18e46a03 | 294 | BlockBackend *blk; |
666daa68 MA |
295 | DriveInfo *dinfo; |
296 | ||
c5be7445 EGE |
297 | GLOBAL_STATE_CODE(); |
298 | ||
666daa68 | 299 | max_bus = -1; |
18e46a03 MA |
300 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
301 | dinfo = blk_legacy_dinfo(blk); | |
302 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { | |
666daa68 | 303 | max_bus = dinfo->bus; |
18e46a03 | 304 | } |
666daa68 MA |
305 | } |
306 | return max_bus; | |
307 | } | |
308 | ||
666daa68 MA |
309 | static void bdrv_format_print(void *opaque, const char *name) |
310 | { | |
cdcd4361 | 311 | qemu_printf(" %s", name); |
666daa68 MA |
312 | } |
313 | ||
aa398a5c SH |
314 | typedef struct { |
315 | QEMUBH *bh; | |
fa510ebf FZ |
316 | BlockDriverState *bs; |
317 | } BDRVPutRefBH; | |
aa398a5c | 318 | |
b681072d | 319 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) |
666daa68 MA |
320 | { |
321 | if (!strcmp(buf, "ignore")) { | |
92aa5c6d | 322 | return BLOCKDEV_ON_ERROR_IGNORE; |
666daa68 | 323 | } else if (!is_read && !strcmp(buf, "enospc")) { |
92aa5c6d | 324 | return BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 325 | } else if (!strcmp(buf, "stop")) { |
92aa5c6d | 326 | return BLOCKDEV_ON_ERROR_STOP; |
666daa68 | 327 | } else if (!strcmp(buf, "report")) { |
92aa5c6d | 328 | return BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 329 | } else { |
b681072d KW |
330 | error_setg(errp, "'%s' invalid %s error action", |
331 | buf, is_read ? "read" : "write"); | |
666daa68 MA |
332 | return -1; |
333 | } | |
334 | } | |
335 | ||
40119eff AG |
336 | static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals, |
337 | Error **errp) | |
338 | { | |
339 | const QListEntry *entry; | |
340 | for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) { | |
341 | switch (qobject_type(entry->value)) { | |
342 | ||
343 | case QTYPE_QSTRING: { | |
344 | unsigned long long length; | |
7dc847eb HR |
345 | const char *str = qstring_get_str(qobject_to(QString, |
346 | entry->value)); | |
40119eff AG |
347 | if (parse_uint_full(str, &length, 10) == 0 && |
348 | length > 0 && length <= UINT_MAX) { | |
349 | block_acct_add_interval(stats, (unsigned) length); | |
350 | } else { | |
351 | error_setg(errp, "Invalid interval length: %s", str); | |
352 | return false; | |
353 | } | |
354 | break; | |
355 | } | |
356 | ||
01b2ffce | 357 | case QTYPE_QNUM: { |
7dc847eb | 358 | int64_t length = qnum_get_int(qobject_to(QNum, entry->value)); |
01b2ffce | 359 | |
40119eff AG |
360 | if (length > 0 && length <= UINT_MAX) { |
361 | block_acct_add_interval(stats, (unsigned) length); | |
362 | } else { | |
363 | error_setg(errp, "Invalid interval length: %" PRId64, length); | |
364 | return false; | |
365 | } | |
366 | break; | |
367 | } | |
368 | ||
369 | default: | |
370 | error_setg(errp, "The specification of stats-intervals is invalid"); | |
371 | return false; | |
372 | } | |
373 | } | |
374 | return true; | |
375 | } | |
376 | ||
33cb7dc8 KW |
377 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; |
378 | ||
fbf8175e HR |
379 | /* All parameters but @opts are optional and may be set to NULL. */ |
380 | static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, | |
381 | const char **throttling_group, ThrottleConfig *throttle_cfg, | |
382 | BlockdevDetectZeroesOptions *detect_zeroes, Error **errp) | |
383 | { | |
fbf8175e HR |
384 | Error *local_error = NULL; |
385 | const char *aio; | |
386 | ||
387 | if (bdrv_flags) { | |
fbf8175e HR |
388 | if (qemu_opt_get_bool(opts, "copy-on-read", false)) { |
389 | *bdrv_flags |= BDRV_O_COPY_ON_READ; | |
390 | } | |
391 | ||
fbf8175e | 392 | if ((aio = qemu_opt_get(opts, "aio")) != NULL) { |
f80f2673 AM |
393 | if (bdrv_parse_aio(aio, bdrv_flags) < 0) { |
394 | error_setg(errp, "invalid aio option"); | |
395 | return; | |
fbf8175e HR |
396 | } |
397 | } | |
398 | } | |
399 | ||
400 | /* disk I/O throttling */ | |
401 | if (throttling_group) { | |
402 | *throttling_group = qemu_opt_get(opts, "throttling.group"); | |
403 | } | |
404 | ||
405 | if (throttle_cfg) { | |
1588ab5d | 406 | throttle_config_init(throttle_cfg); |
fbf8175e HR |
407 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg = |
408 | qemu_opt_get_number(opts, "throttling.bps-total", 0); | |
409 | throttle_cfg->buckets[THROTTLE_BPS_READ].avg = | |
410 | qemu_opt_get_number(opts, "throttling.bps-read", 0); | |
411 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg = | |
412 | qemu_opt_get_number(opts, "throttling.bps-write", 0); | |
413 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg = | |
414 | qemu_opt_get_number(opts, "throttling.iops-total", 0); | |
415 | throttle_cfg->buckets[THROTTLE_OPS_READ].avg = | |
416 | qemu_opt_get_number(opts, "throttling.iops-read", 0); | |
417 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg = | |
418 | qemu_opt_get_number(opts, "throttling.iops-write", 0); | |
419 | ||
420 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max = | |
421 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
422 | throttle_cfg->buckets[THROTTLE_BPS_READ].max = | |
423 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
424 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].max = | |
425 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
426 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max = | |
427 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
428 | throttle_cfg->buckets[THROTTLE_OPS_READ].max = | |
429 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
430 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].max = | |
431 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
432 | ||
8a0fc18d AG |
433 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length = |
434 | qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1); | |
435 | throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length = | |
436 | qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1); | |
437 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length = | |
438 | qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1); | |
439 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length = | |
440 | qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1); | |
441 | throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length = | |
442 | qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1); | |
443 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length = | |
444 | qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1); | |
445 | ||
fbf8175e HR |
446 | throttle_cfg->op_size = |
447 | qemu_opt_get_number(opts, "throttling.iops-size", 0); | |
448 | ||
d5851089 | 449 | if (!throttle_is_valid(throttle_cfg, errp)) { |
fbf8175e HR |
450 | return; |
451 | } | |
452 | } | |
453 | ||
454 | if (detect_zeroes) { | |
455 | *detect_zeroes = | |
f7abe0ec | 456 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, |
fbf8175e | 457 | qemu_opt_get(opts, "detect-zeroes"), |
fbf8175e HR |
458 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
459 | &local_error); | |
460 | if (local_error) { | |
461 | error_propagate(errp, local_error); | |
462 | return; | |
463 | } | |
fbf8175e HR |
464 | } |
465 | } | |
466 | ||
b2aaf354 DL |
467 | static OnOffAuto account_get_opt(QemuOpts *opts, const char *name) |
468 | { | |
469 | if (!qemu_opt_find(opts, name)) { | |
470 | return ON_OFF_AUTO_AUTO; | |
471 | } | |
472 | if (qemu_opt_get_bool(opts, name, true)) { | |
473 | return ON_OFF_AUTO_ON; | |
474 | } | |
475 | return ON_OFF_AUTO_OFF; | |
476 | } | |
477 | ||
f298d071 | 478 | /* Takes the ownership of bs_opts */ |
18e46a03 MA |
479 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, |
480 | Error **errp) | |
666daa68 MA |
481 | { |
482 | const char *buf; | |
666daa68 MA |
483 | int bdrv_flags = 0; |
484 | int on_read_error, on_write_error; | |
b2aaf354 | 485 | OnOffAuto account_invalid, account_failed; |
f87a0e29 | 486 | bool writethrough, read_only; |
26f54e9a | 487 | BlockBackend *blk; |
a0f1eab1 | 488 | BlockDriverState *bs; |
cc0681c4 | 489 | ThrottleConfig cfg; |
666daa68 | 490 | int snapshot = 0; |
c546194f | 491 | Error *error = NULL; |
0006383e | 492 | QemuOpts *opts; |
40119eff AG |
493 | QDict *interval_dict = NULL; |
494 | QList *interval_list = NULL; | |
0006383e | 495 | const char *id; |
fbf8175e HR |
496 | BlockdevDetectZeroesOptions detect_zeroes = |
497 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; | |
498 | const char *throttling_group = NULL; | |
666daa68 | 499 | |
f298d071 KW |
500 | /* Check common options by copying from bs_opts to opts, all other options |
501 | * stay in bs_opts for processing by bdrv_open(). */ | |
502 | id = qdict_get_try_str(bs_opts, "id"); | |
c6ecec43 MA |
503 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, errp); |
504 | if (!opts) { | |
6376f952 | 505 | goto err_no_opts; |
0006383e KW |
506 | } |
507 | ||
668f62ec | 508 | if (!qemu_opts_absorb_qdict(opts, bs_opts, errp)) { |
ec9c10d2 | 509 | goto early_err; |
0006383e KW |
510 | } |
511 | ||
512 | if (id) { | |
513 | qdict_del(bs_opts, "id"); | |
514 | } | |
515 | ||
666daa68 | 516 | /* extract parameters */ |
666daa68 | 517 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
666daa68 | 518 | |
b2aaf354 DL |
519 | account_invalid = account_get_opt(opts, "stats-account-invalid"); |
520 | account_failed = account_get_opt(opts, "stats-account-failed"); | |
362e9299 | 521 | |
e4b24b49 KW |
522 | writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true); |
523 | ||
ff356ee4 AG |
524 | id = qemu_opts_id(opts); |
525 | ||
40119eff AG |
526 | qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals."); |
527 | qdict_array_split(interval_dict, &interval_list); | |
528 | ||
529 | if (qdict_size(interval_dict) != 0) { | |
530 | error_setg(errp, "Invalid option stats-intervals.%s", | |
531 | qdict_first(interval_dict)->key); | |
532 | goto early_err; | |
533 | } | |
2be5506f | 534 | |
fbf8175e HR |
535 | extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg, |
536 | &detect_zeroes, &error); | |
537 | if (error) { | |
538 | error_propagate(errp, error); | |
539 | goto early_err; | |
666daa68 | 540 | } |
666daa68 MA |
541 | |
542 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
c8057f95 | 543 | if (is_help_option(buf)) { |
cdcd4361 | 544 | qemu_printf("Supported formats:"); |
9ac404c5 | 545 | bdrv_iterate_format(bdrv_format_print, NULL, false); |
cdcd4361 | 546 | qemu_printf("\nSupported formats (read-only):"); |
9ac404c5 | 547 | bdrv_iterate_format(bdrv_format_print, NULL, true); |
cdcd4361 | 548 | qemu_printf("\n"); |
ec9c10d2 | 549 | goto early_err; |
666daa68 | 550 | } |
74fe54f2 | 551 | |
e4342ce5 HR |
552 | if (qdict_haskey(bs_opts, "driver")) { |
553 | error_setg(errp, "Cannot specify both 'driver' and 'format'"); | |
ec9c10d2 | 554 | goto early_err; |
6db5f5d6 | 555 | } |
46f5ac20 | 556 | qdict_put_str(bs_opts, "driver", buf); |
666daa68 MA |
557 | } |
558 | ||
92aa5c6d | 559 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 560 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
b681072d | 561 | on_write_error = parse_block_error_action(buf, 0, &error); |
84d18f06 | 562 | if (error) { |
b681072d | 563 | error_propagate(errp, error); |
ec9c10d2 | 564 | goto early_err; |
666daa68 MA |
565 | } |
566 | } | |
567 | ||
92aa5c6d | 568 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 569 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
b681072d | 570 | on_read_error = parse_block_error_action(buf, 1, &error); |
84d18f06 | 571 | if (error) { |
b681072d | 572 | error_propagate(errp, error); |
ec9c10d2 | 573 | goto early_err; |
666daa68 MA |
574 | } |
575 | } | |
576 | ||
5ec18f8c | 577 | if (snapshot) { |
91a097e7 | 578 | bdrv_flags |= BDRV_O_SNAPSHOT; |
5ec18f8c HR |
579 | } |
580 | ||
f87a0e29 AG |
581 | read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false); |
582 | ||
326642bc | 583 | /* init */ |
39c4ae94 | 584 | if ((!file || !*file) && !qdict_size(bs_opts)) { |
5ec18f8c HR |
585 | BlockBackendRootState *blk_rs; |
586 | ||
d861ab3a | 587 | blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); |
5ec18f8c | 588 | blk_rs = blk_get_root_state(blk); |
260242a8 | 589 | blk_rs->open_flags = bdrv_flags | (read_only ? 0 : BDRV_O_RDWR); |
5ec18f8c HR |
590 | blk_rs->detect_zeroes = detect_zeroes; |
591 | ||
cb3e7f08 | 592 | qobject_unref(bs_opts); |
e4342ce5 HR |
593 | } else { |
594 | if (file && !*file) { | |
c2ad1b0c | 595 | file = NULL; |
c2ad1b0c | 596 | } |
666daa68 | 597 | |
91a097e7 KW |
598 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
599 | * with other callers) rather than what we want as the real defaults. | |
600 | * Apply the defaults here instead. */ | |
91a097e7 KW |
601 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); |
602 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
f87a0e29 AG |
603 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, |
604 | read_only ? "on" : "off"); | |
9384a444 | 605 | qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on"); |
72e775c7 | 606 | assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0); |
91a097e7 | 607 | |
12d5ee3a KW |
608 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
609 | bdrv_flags |= BDRV_O_INACTIVE; | |
610 | } | |
611 | ||
efaa7c4e | 612 | blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp); |
e4342ce5 HR |
613 | if (!blk) { |
614 | goto err_no_bs_opts; | |
615 | } | |
616 | bs = blk_bs(blk); | |
ed9d4205 | 617 | |
5ec18f8c | 618 | bs->detect_zeroes = detect_zeroes; |
666daa68 | 619 | |
9caa6f3d | 620 | block_acct_setup(blk_get_stats(blk), account_invalid, account_failed); |
2be5506f | 621 | |
40119eff AG |
622 | if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) { |
623 | blk_unref(blk); | |
624 | blk = NULL; | |
625 | goto err_no_bs_opts; | |
2be5506f | 626 | } |
666daa68 MA |
627 | } |
628 | ||
7ca7f0f6 KW |
629 | /* disk I/O throttling */ |
630 | if (throttle_enabled(&cfg)) { | |
631 | if (!throttling_group) { | |
ff356ee4 | 632 | throttling_group = id; |
7ca7f0f6 KW |
633 | } |
634 | blk_io_limits_enable(blk, throttling_group); | |
635 | blk_set_io_limits(blk, &cfg); | |
636 | } | |
637 | ||
e4b24b49 | 638 | blk_set_enable_write_cache(blk, !writethrough); |
5ec18f8c | 639 | blk_set_on_error(blk, on_read_error, on_write_error); |
0006383e | 640 | |
ff356ee4 | 641 | if (!monitor_add_blk(blk, id, errp)) { |
efaa7c4e HR |
642 | blk_unref(blk); |
643 | blk = NULL; | |
644 | goto err_no_bs_opts; | |
645 | } | |
646 | ||
e4342ce5 | 647 | err_no_bs_opts: |
0006383e | 648 | qemu_opts_del(opts); |
cb3e7f08 MAL |
649 | qobject_unref(interval_dict); |
650 | qobject_unref(interval_list); | |
18e46a03 | 651 | return blk; |
a9ae2bff | 652 | |
ec9c10d2 | 653 | early_err: |
ec9c10d2 | 654 | qemu_opts_del(opts); |
cb3e7f08 MAL |
655 | qobject_unref(interval_dict); |
656 | qobject_unref(interval_list); | |
6376f952 | 657 | err_no_opts: |
cb3e7f08 | 658 | qobject_unref(bs_opts); |
a9ae2bff | 659 | return NULL; |
666daa68 MA |
660 | } |
661 | ||
bd745e23 | 662 | /* Takes the ownership of bs_opts */ |
89802d5a | 663 | BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) |
bd745e23 | 664 | { |
bd745e23 HR |
665 | int bdrv_flags = 0; |
666 | ||
b4ad82aa | 667 | GLOBAL_STATE_CODE(); |
a81d6164 KW |
668 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
669 | * with other callers) rather than what we want as the real defaults. | |
670 | * Apply the defaults here instead. */ | |
a81d6164 KW |
671 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); |
672 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
f87a0e29 | 673 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off"); |
a81d6164 | 674 | |
12d5ee3a KW |
675 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
676 | bdrv_flags |= BDRV_O_INACTIVE; | |
677 | } | |
678 | ||
74e1ae7c | 679 | return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp); |
bd745e23 HR |
680 | } |
681 | ||
9c4218e9 HR |
682 | void blockdev_close_all_bdrv_states(void) |
683 | { | |
684 | BlockDriverState *bs, *next_bs; | |
685 | ||
b4ad82aa | 686 | GLOBAL_STATE_CODE(); |
9c4218e9 HR |
687 | QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) { |
688 | AioContext *ctx = bdrv_get_aio_context(bs); | |
689 | ||
690 | aio_context_acquire(ctx); | |
691 | bdrv_unref(bs); | |
692 | aio_context_release(ctx); | |
693 | } | |
694 | } | |
695 | ||
262b4e8f HR |
696 | /* Iterates over the list of monitor-owned BlockDriverStates */ |
697 | BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs) | |
698 | { | |
f791bf7f | 699 | GLOBAL_STATE_CODE(); |
262b4e8f HR |
700 | return bs ? QTAILQ_NEXT(bs, monitor_list) |
701 | : QTAILQ_FIRST(&monitor_bdrv_states); | |
702 | } | |
703 | ||
c75d7f71 | 704 | static bool qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, |
5abbf0ee | 705 | Error **errp) |
57975222 KW |
706 | { |
707 | const char *value; | |
708 | ||
709 | value = qemu_opt_get(opts, from); | |
710 | if (value) { | |
5abbf0ee KW |
711 | if (qemu_opt_find(opts, to)) { |
712 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " | |
713 | "same time", to, from); | |
c75d7f71 | 714 | return false; |
5abbf0ee | 715 | } |
20d6cd47 JL |
716 | } |
717 | ||
718 | /* rename all items in opts */ | |
719 | while ((value = qemu_opt_get(opts, from))) { | |
f43e47db | 720 | qemu_opt_set(opts, to, value, &error_abort); |
57975222 KW |
721 | qemu_opt_unset(opts, from); |
722 | } | |
c75d7f71 | 723 | return true; |
57975222 KW |
724 | } |
725 | ||
33cb7dc8 KW |
726 | QemuOptsList qemu_legacy_drive_opts = { |
727 | .name = "drive", | |
728 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
729 | .desc = { | |
730 | { | |
87a899c5 KW |
731 | .name = "bus", |
732 | .type = QEMU_OPT_NUMBER, | |
733 | .help = "bus number", | |
734 | },{ | |
735 | .name = "unit", | |
736 | .type = QEMU_OPT_NUMBER, | |
737 | .help = "unit number (i.e. lun for scsi)", | |
738 | },{ | |
739 | .name = "index", | |
740 | .type = QEMU_OPT_NUMBER, | |
741 | .help = "index number", | |
742 | },{ | |
33cb7dc8 KW |
743 | .name = "media", |
744 | .type = QEMU_OPT_STRING, | |
745 | .help = "media type (disk, cdrom)", | |
593d464b KW |
746 | },{ |
747 | .name = "if", | |
748 | .type = QEMU_OPT_STRING, | |
749 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
d095b465 HR |
750 | },{ |
751 | .name = "file", | |
752 | .type = QEMU_OPT_STRING, | |
753 | .help = "file name", | |
33cb7dc8 | 754 | }, |
0ebd24e0 KW |
755 | |
756 | /* Options that are passed on, but have special semantics with -drive */ | |
757 | { | |
4e200cf8 | 758 | .name = BDRV_OPT_READ_ONLY, |
0ebd24e0 KW |
759 | .type = QEMU_OPT_BOOL, |
760 | .help = "open drive file as read-only", | |
ee13ed1c KW |
761 | },{ |
762 | .name = "rerror", | |
763 | .type = QEMU_OPT_STRING, | |
764 | .help = "read error action", | |
765 | },{ | |
766 | .name = "werror", | |
767 | .type = QEMU_OPT_STRING, | |
768 | .help = "write error action", | |
0ebd24e0 KW |
769 | },{ |
770 | .name = "copy-on-read", | |
771 | .type = QEMU_OPT_BOOL, | |
772 | .help = "copy read data from backing file into image file", | |
773 | }, | |
774 | ||
33cb7dc8 KW |
775 | { /* end of list */ } |
776 | }, | |
777 | }; | |
778 | ||
c4f26c9f MA |
779 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type, |
780 | Error **errp) | |
57975222 | 781 | { |
29c4e2b5 | 782 | const char *value; |
18e46a03 | 783 | BlockBackend *blk; |
33cb7dc8 | 784 | DriveInfo *dinfo = NULL; |
f298d071 | 785 | QDict *bs_opts; |
33cb7dc8 KW |
786 | QemuOpts *legacy_opts; |
787 | DriveMediaType media = MEDIA_DISK; | |
593d464b | 788 | BlockInterfaceType type; |
87a899c5 | 789 | int max_devs, bus_id, unit_id, index; |
ee13ed1c | 790 | const char *werror, *rerror; |
a7fdbcf0 FZ |
791 | bool read_only = false; |
792 | bool copy_on_read; | |
d095b465 | 793 | const char *filename; |
247147fb | 794 | int i; |
29c4e2b5 | 795 | |
c5be7445 EGE |
796 | GLOBAL_STATE_CODE(); |
797 | ||
57975222 | 798 | /* Change legacy command line options into QMP ones */ |
247147fb KW |
799 | static const struct { |
800 | const char *from; | |
801 | const char *to; | |
802 | } opt_renames[] = { | |
803 | { "iops", "throttling.iops-total" }, | |
804 | { "iops_rd", "throttling.iops-read" }, | |
805 | { "iops_wr", "throttling.iops-write" }, | |
57975222 | 806 | |
247147fb KW |
807 | { "bps", "throttling.bps-total" }, |
808 | { "bps_rd", "throttling.bps-read" }, | |
809 | { "bps_wr", "throttling.bps-write" }, | |
57975222 | 810 | |
247147fb KW |
811 | { "iops_max", "throttling.iops-total-max" }, |
812 | { "iops_rd_max", "throttling.iops-read-max" }, | |
813 | { "iops_wr_max", "throttling.iops-write-max" }, | |
3e9fab69 | 814 | |
247147fb KW |
815 | { "bps_max", "throttling.bps-total-max" }, |
816 | { "bps_rd_max", "throttling.bps-read-max" }, | |
817 | { "bps_wr_max", "throttling.bps-write-max" }, | |
3e9fab69 | 818 | |
247147fb | 819 | { "iops_size", "throttling.iops-size" }, |
2024c1df | 820 | |
76f4afb4 AG |
821 | { "group", "throttling.group" }, |
822 | ||
4e200cf8 | 823 | { "readonly", BDRV_OPT_READ_ONLY }, |
247147fb KW |
824 | }; |
825 | ||
826 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { | |
235e59cf | 827 | if (!qemu_opt_rename(all_opts, opt_renames[i].from, |
668f62ec | 828 | opt_renames[i].to, errp)) { |
5abbf0ee KW |
829 | return NULL; |
830 | } | |
247147fb | 831 | } |
0f227a94 | 832 | |
29c4e2b5 KW |
833 | value = qemu_opt_get(all_opts, "cache"); |
834 | if (value) { | |
835 | int flags = 0; | |
04feb4a5 | 836 | bool writethrough; |
29c4e2b5 | 837 | |
04feb4a5 | 838 | if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) { |
c4f26c9f | 839 | error_setg(errp, "invalid cache option"); |
29c4e2b5 KW |
840 | return NULL; |
841 | } | |
842 | ||
843 | /* Specific options take precedence */ | |
54861b92 KW |
844 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) { |
845 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB, | |
04feb4a5 | 846 | !writethrough, &error_abort); |
29c4e2b5 | 847 | } |
54861b92 KW |
848 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) { |
849 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT, | |
cccb7967 | 850 | !!(flags & BDRV_O_NOCACHE), &error_abort); |
29c4e2b5 | 851 | } |
54861b92 KW |
852 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) { |
853 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH, | |
cccb7967 | 854 | !!(flags & BDRV_O_NO_FLUSH), &error_abort); |
29c4e2b5 KW |
855 | } |
856 | qemu_opt_unset(all_opts, "cache"); | |
857 | } | |
858 | ||
f298d071 KW |
859 | /* Get a QDict for processing the options */ |
860 | bs_opts = qdict_new(); | |
861 | qemu_opts_to_qdict(all_opts, bs_opts); | |
862 | ||
87ea75d5 PC |
863 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, |
864 | &error_abort); | |
af175e85 | 865 | if (!qemu_opts_absorb_qdict(legacy_opts, bs_opts, errp)) { |
33cb7dc8 KW |
866 | goto fail; |
867 | } | |
868 | ||
869 | /* Media type */ | |
870 | value = qemu_opt_get(legacy_opts, "media"); | |
871 | if (value) { | |
872 | if (!strcmp(value, "disk")) { | |
873 | media = MEDIA_DISK; | |
874 | } else if (!strcmp(value, "cdrom")) { | |
875 | media = MEDIA_CDROM; | |
a7fdbcf0 | 876 | read_only = true; |
33cb7dc8 | 877 | } else { |
c4f26c9f | 878 | error_setg(errp, "'%s' invalid media", value); |
33cb7dc8 KW |
879 | goto fail; |
880 | } | |
881 | } | |
882 | ||
0ebd24e0 | 883 | /* copy-on-read is disabled with a warning for read-only devices */ |
4e200cf8 | 884 | read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false); |
0ebd24e0 KW |
885 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); |
886 | ||
887 | if (read_only && copy_on_read) { | |
3dc6f869 | 888 | warn_report("disabling copy-on-read on read-only drive"); |
0ebd24e0 KW |
889 | copy_on_read = false; |
890 | } | |
891 | ||
46f5ac20 EB |
892 | qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off"); |
893 | qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off"); | |
0ebd24e0 | 894 | |
593d464b KW |
895 | /* Controller type */ |
896 | value = qemu_opt_get(legacy_opts, "if"); | |
897 | if (value) { | |
898 | for (type = 0; | |
899 | type < IF_COUNT && strcmp(value, if_name[type]); | |
900 | type++) { | |
901 | } | |
902 | if (type == IF_COUNT) { | |
c4f26c9f | 903 | error_setg(errp, "unsupported bus type '%s'", value); |
593d464b KW |
904 | goto fail; |
905 | } | |
906 | } else { | |
907 | type = block_default_type; | |
908 | } | |
909 | ||
87a899c5 KW |
910 | /* Device address specified by bus/unit or index. |
911 | * If none was specified, try to find the first free one. */ | |
912 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
913 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
914 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
915 | ||
916 | max_devs = if_max_devs[type]; | |
917 | ||
918 | if (index != -1) { | |
919 | if (bus_id != 0 || unit_id != -1) { | |
c4f26c9f | 920 | error_setg(errp, "index cannot be used with bus and unit"); |
87a899c5 KW |
921 | goto fail; |
922 | } | |
923 | bus_id = drive_index_to_bus_id(type, index); | |
924 | unit_id = drive_index_to_unit_id(type, index); | |
925 | } | |
926 | ||
927 | if (unit_id == -1) { | |
928 | unit_id = 0; | |
929 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
930 | unit_id++; | |
931 | if (max_devs && unit_id >= max_devs) { | |
932 | unit_id -= max_devs; | |
933 | bus_id++; | |
934 | } | |
935 | } | |
936 | } | |
937 | ||
938 | if (max_devs && unit_id >= max_devs) { | |
c4f26c9f | 939 | error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1); |
87a899c5 KW |
940 | goto fail; |
941 | } | |
942 | ||
943 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
c4f26c9f MA |
944 | error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists", |
945 | bus_id, unit_id, index); | |
87a899c5 KW |
946 | goto fail; |
947 | } | |
948 | ||
949 | /* no id supplied -> create one */ | |
950 | if (qemu_opts_id(all_opts) == NULL) { | |
951 | char *new_id; | |
952 | const char *mediastr = ""; | |
953 | if (type == IF_IDE || type == IF_SCSI) { | |
954 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
955 | } | |
956 | if (max_devs) { | |
957 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
958 | mediastr, unit_id); | |
959 | } else { | |
960 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
961 | mediastr, unit_id); | |
962 | } | |
46f5ac20 | 963 | qdict_put_str(bs_opts, "id", new_id); |
87a899c5 KW |
964 | g_free(new_id); |
965 | } | |
966 | ||
394c7d4d | 967 | /* Add virtio block device */ |
394c7d4d KW |
968 | if (type == IF_VIRTIO) { |
969 | QemuOpts *devopts; | |
87ea75d5 PC |
970 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
971 | &error_abort); | |
9db1d3a2 | 972 | qemu_opt_set(devopts, "driver", "virtio-blk", &error_abort); |
f43e47db MA |
973 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"), |
974 | &error_abort); | |
394c7d4d KW |
975 | } |
976 | ||
d095b465 HR |
977 | filename = qemu_opt_get(legacy_opts, "file"); |
978 | ||
ee13ed1c KW |
979 | /* Check werror/rerror compatibility with if=... */ |
980 | werror = qemu_opt_get(legacy_opts, "werror"); | |
981 | if (werror != NULL) { | |
982 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
983 | type != IF_NONE) { | |
c4f26c9f | 984 | error_setg(errp, "werror is not supported by this bus type"); |
ee13ed1c KW |
985 | goto fail; |
986 | } | |
46f5ac20 | 987 | qdict_put_str(bs_opts, "werror", werror); |
ee13ed1c KW |
988 | } |
989 | ||
990 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
991 | if (rerror != NULL) { | |
992 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
993 | type != IF_NONE) { | |
c4f26c9f | 994 | error_setg(errp, "rerror is not supported by this bus type"); |
ee13ed1c KW |
995 | goto fail; |
996 | } | |
46f5ac20 | 997 | qdict_put_str(bs_opts, "rerror", rerror); |
ee13ed1c KW |
998 | } |
999 | ||
2d246f01 | 1000 | /* Actual block device init: Functionality shared with blockdev-add */ |
992861fb | 1001 | blk = blockdev_init(filename, bs_opts, errp); |
3cb0e25c | 1002 | bs_opts = NULL; |
18e46a03 | 1003 | if (!blk) { |
2d246f01 KW |
1004 | goto fail; |
1005 | } | |
1006 | ||
26f8b3a8 MA |
1007 | /* Create legacy DriveInfo */ |
1008 | dinfo = g_malloc0(sizeof(*dinfo)); | |
f298d071 | 1009 | dinfo->opts = all_opts; |
2d246f01 | 1010 | |
ee13ed1c | 1011 | dinfo->type = type; |
87a899c5 KW |
1012 | dinfo->bus = bus_id; |
1013 | dinfo->unit = unit_id; | |
bcf83158 | 1014 | |
26f8b3a8 MA |
1015 | blk_set_legacy_dinfo(blk, dinfo); |
1016 | ||
e34ef046 KW |
1017 | switch(type) { |
1018 | case IF_IDE: | |
1019 | case IF_SCSI: | |
1020 | case IF_XEN: | |
1021 | case IF_NONE: | |
1022 | dinfo->media_cd = media == MEDIA_CDROM; | |
1023 | break; | |
1024 | default: | |
1025 | break; | |
1026 | } | |
1027 | ||
2d246f01 | 1028 | fail: |
33cb7dc8 | 1029 | qemu_opts_del(legacy_opts); |
cb3e7f08 | 1030 | qobject_unref(bs_opts); |
2d246f01 | 1031 | return dinfo; |
57975222 KW |
1032 | } |
1033 | ||
b6c1bae5 KW |
1034 | static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp) |
1035 | { | |
1036 | BlockDriverState *bs; | |
1e97be91 | 1037 | AioContext *aio_context; |
b6c1bae5 KW |
1038 | |
1039 | bs = bdrv_lookup_bs(name, name, errp); | |
1040 | if (bs == NULL) { | |
1041 | return NULL; | |
1042 | } | |
1043 | ||
1044 | if (!bdrv_is_root_node(bs)) { | |
1045 | error_setg(errp, "Need a root block node"); | |
1046 | return NULL; | |
1047 | } | |
1048 | ||
1e97be91 EGE |
1049 | aio_context = bdrv_get_aio_context(bs); |
1050 | aio_context_acquire(aio_context); | |
1051 | ||
b6c1bae5 KW |
1052 | if (!bdrv_is_inserted(bs)) { |
1053 | error_setg(errp, "Device has no medium"); | |
1e97be91 | 1054 | bs = NULL; |
b6c1bae5 KW |
1055 | } |
1056 | ||
1e97be91 EGE |
1057 | aio_context_release(aio_context); |
1058 | ||
b6c1bae5 KW |
1059 | return bs; |
1060 | } | |
1061 | ||
10f75907 | 1062 | static void blockdev_do_action(TransactionAction *action, Error **errp) |
6cc2a415 | 1063 | { |
c8a83e85 | 1064 | TransactionActionList list; |
6cc2a415 | 1065 | |
10f75907 | 1066 | list.value = action; |
6cc2a415 | 1067 | list.next = NULL; |
238e9202 | 1068 | qmp_transaction(&list, NULL, errp); |
6cc2a415 PB |
1069 | } |
1070 | ||
54fde4ff | 1071 | void qmp_blockdev_snapshot_sync(const char *device, const char *node_name, |
0901f67e | 1072 | const char *snapshot_file, |
0901f67e | 1073 | const char *snapshot_node_name, |
54fde4ff | 1074 | const char *format, |
0901f67e | 1075 | bool has_mode, NewImageMode mode, Error **errp) |
f8882568 | 1076 | { |
a911e6ae | 1077 | BlockdevSnapshotSync snapshot = { |
6cc2a415 | 1078 | .device = (char *) device, |
0901f67e | 1079 | .node_name = (char *) node_name, |
6cc2a415 | 1080 | .snapshot_file = (char *) snapshot_file, |
0901f67e | 1081 | .snapshot_node_name = (char *) snapshot_node_name, |
6cc2a415 PB |
1082 | .format = (char *) format, |
1083 | .has_mode = has_mode, | |
1084 | .mode = mode, | |
1085 | }; | |
10f75907 EB |
1086 | TransactionAction action = { |
1087 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, | |
32bafa8f | 1088 | .u.blockdev_snapshot_sync.data = &snapshot, |
10f75907 EB |
1089 | }; |
1090 | blockdev_do_action(&action, errp); | |
f8882568 JS |
1091 | } |
1092 | ||
43de7e2d AG |
1093 | void qmp_blockdev_snapshot(const char *node, const char *overlay, |
1094 | Error **errp) | |
1095 | { | |
1096 | BlockdevSnapshot snapshot_data = { | |
1097 | .node = (char *) node, | |
1098 | .overlay = (char *) overlay | |
1099 | }; | |
10f75907 EB |
1100 | TransactionAction action = { |
1101 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, | |
32bafa8f | 1102 | .u.blockdev_snapshot.data = &snapshot_data, |
10f75907 EB |
1103 | }; |
1104 | blockdev_do_action(&action, errp); | |
43de7e2d AG |
1105 | } |
1106 | ||
f323bc9e WX |
1107 | void qmp_blockdev_snapshot_internal_sync(const char *device, |
1108 | const char *name, | |
1109 | Error **errp) | |
1110 | { | |
1111 | BlockdevSnapshotInternal snapshot = { | |
1112 | .device = (char *) device, | |
1113 | .name = (char *) name | |
1114 | }; | |
10f75907 EB |
1115 | TransactionAction action = { |
1116 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
32bafa8f | 1117 | .u.blockdev_snapshot_internal_sync.data = &snapshot, |
10f75907 EB |
1118 | }; |
1119 | blockdev_do_action(&action, errp); | |
f323bc9e WX |
1120 | } |
1121 | ||
44e3e053 | 1122 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
44e3e053 | 1123 | const char *id, |
44e3e053 WX |
1124 | const char *name, |
1125 | Error **errp) | |
1126 | { | |
a0e8544c | 1127 | BlockDriverState *bs; |
4ef3982a | 1128 | AioContext *aio_context; |
44e3e053 WX |
1129 | QEMUSnapshotInfo sn; |
1130 | Error *local_err = NULL; | |
1131 | SnapshotInfo *info = NULL; | |
1132 | int ret; | |
1133 | ||
2dfb4c03 KW |
1134 | bs = qmp_get_root_bs(device, errp); |
1135 | if (!bs) { | |
44e3e053 WX |
1136 | return NULL; |
1137 | } | |
2dfb4c03 | 1138 | aio_context = bdrv_get_aio_context(bs); |
5433c24f | 1139 | aio_context_acquire(aio_context); |
44e3e053 | 1140 | |
44e3e053 WX |
1141 | if (!id && !name) { |
1142 | error_setg(errp, "Name or id must be provided"); | |
5433c24f | 1143 | goto out_aio_context; |
44e3e053 WX |
1144 | } |
1145 | ||
0b928854 SH |
1146 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) { |
1147 | goto out_aio_context; | |
1148 | } | |
1149 | ||
44e3e053 | 1150 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); |
84d18f06 | 1151 | if (local_err) { |
44e3e053 | 1152 | error_propagate(errp, local_err); |
4ef3982a | 1153 | goto out_aio_context; |
44e3e053 WX |
1154 | } |
1155 | if (!ret) { | |
1156 | error_setg(errp, | |
1157 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1158 | "device '%s'", | |
1159 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
4ef3982a | 1160 | goto out_aio_context; |
44e3e053 WX |
1161 | } |
1162 | ||
1163 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
84d18f06 | 1164 | if (local_err) { |
44e3e053 | 1165 | error_propagate(errp, local_err); |
4ef3982a | 1166 | goto out_aio_context; |
44e3e053 WX |
1167 | } |
1168 | ||
4ef3982a SH |
1169 | aio_context_release(aio_context); |
1170 | ||
5839e53b | 1171 | info = g_new0(SnapshotInfo, 1); |
44e3e053 WX |
1172 | info->id = g_strdup(sn.id_str); |
1173 | info->name = g_strdup(sn.name); | |
1174 | info->date_nsec = sn.date_nsec; | |
1175 | info->date_sec = sn.date_sec; | |
1176 | info->vm_state_size = sn.vm_state_size; | |
1177 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1178 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
b39847a5 PD |
1179 | if (sn.icount != -1ULL) { |
1180 | info->icount = sn.icount; | |
1181 | info->has_icount = true; | |
1182 | } | |
44e3e053 WX |
1183 | |
1184 | return info; | |
4ef3982a SH |
1185 | |
1186 | out_aio_context: | |
1187 | aio_context_release(aio_context); | |
1188 | return NULL; | |
44e3e053 | 1189 | } |
8802d1fd | 1190 | |
b756b9ce | 1191 | /* New and old BlockDriverState structs for atomic group operations */ |
ba0c86a3 | 1192 | |
50f43f0f | 1193 | typedef struct BlkActionState BlkActionState; |
ba0c86a3 | 1194 | |
50f43f0f JS |
1195 | /** |
1196 | * BlkActionOps: | |
1197 | * Table of operations that define an Action. | |
1198 | * | |
1199 | * @instance_size: Size of state struct, in bytes. | |
1200 | * @prepare: Prepare the work, must NOT be NULL. | |
1201 | * @commit: Commit the changes, can be NULL. | |
1202 | * @abort: Abort the changes on fail, can be NULL. | |
1203 | * @clean: Clean up resources after all transaction actions have called | |
1204 | * commit() or abort(). Can be NULL. | |
1205 | * | |
1206 | * Only prepare() may fail. In a single transaction, only one of commit() or | |
1207 | * abort() will be called. clean() will always be called if it is present. | |
ebc2752b EGE |
1208 | * |
1209 | * Always run under BQL. | |
50f43f0f JS |
1210 | */ |
1211 | typedef struct BlkActionOps { | |
ba0c86a3 | 1212 | size_t instance_size; |
50f43f0f JS |
1213 | void (*prepare)(BlkActionState *common, Error **errp); |
1214 | void (*commit)(BlkActionState *common); | |
1215 | void (*abort)(BlkActionState *common); | |
1216 | void (*clean)(BlkActionState *common); | |
1217 | } BlkActionOps; | |
ba0c86a3 | 1218 | |
50f43f0f JS |
1219 | /** |
1220 | * BlkActionState: | |
1221 | * Describes one Action's state within a Transaction. | |
1222 | * | |
1223 | * @action: QAPI-defined enum identifying which Action to perform. | |
1224 | * @ops: Table of ActionOps this Action can perform. | |
94d16a64 | 1225 | * @block_job_txn: Transaction which this action belongs to. |
50f43f0f JS |
1226 | * @entry: List membership for all Actions in this Transaction. |
1227 | * | |
1228 | * This structure must be arranged as first member in a subclassed type, | |
1229 | * assuming that the compiler will also arrange it to the same offsets as the | |
1230 | * base class. | |
ba0c86a3 | 1231 | */ |
50f43f0f | 1232 | struct BlkActionState { |
c8a83e85 | 1233 | TransactionAction *action; |
50f43f0f | 1234 | const BlkActionOps *ops; |
62c9e416 | 1235 | JobTxn *block_job_txn; |
94d16a64 | 1236 | TransactionProperties *txn_props; |
f4de0f8c | 1237 | QTAILQ_ENTRY(BlkActionState) entry; |
ba0c86a3 WX |
1238 | }; |
1239 | ||
bbe86010 WX |
1240 | /* internal snapshot private data */ |
1241 | typedef struct InternalSnapshotState { | |
50f43f0f | 1242 | BlkActionState common; |
bbe86010 WX |
1243 | BlockDriverState *bs; |
1244 | QEMUSnapshotInfo sn; | |
507306cc | 1245 | bool created; |
bbe86010 WX |
1246 | } InternalSnapshotState; |
1247 | ||
94d16a64 JS |
1248 | |
1249 | static int action_check_completion_mode(BlkActionState *s, Error **errp) | |
1250 | { | |
1251 | if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
1252 | error_setg(errp, | |
1253 | "Action '%s' does not support Transaction property " | |
1254 | "completion-mode = %s", | |
977c736f MA |
1255 | TransactionActionKind_str(s->action->type), |
1256 | ActionCompletionMode_str(s->txn_props->completion_mode)); | |
94d16a64 JS |
1257 | return -1; |
1258 | } | |
1259 | return 0; | |
1260 | } | |
1261 | ||
50f43f0f | 1262 | static void internal_snapshot_prepare(BlkActionState *common, |
bbe86010 WX |
1263 | Error **errp) |
1264 | { | |
f70edf99 | 1265 | Error *local_err = NULL; |
bbe86010 WX |
1266 | const char *device; |
1267 | const char *name; | |
1268 | BlockDriverState *bs; | |
1269 | QEMUSnapshotInfo old_sn, *sn; | |
1270 | bool ret; | |
f793dde0 | 1271 | int64_t rt; |
bbe86010 WX |
1272 | BlockdevSnapshotInternal *internal; |
1273 | InternalSnapshotState *state; | |
a36e458c | 1274 | AioContext *aio_context; |
bbe86010 WX |
1275 | int ret1; |
1276 | ||
6a8f9661 | 1277 | g_assert(common->action->type == |
bbe86010 | 1278 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); |
32bafa8f | 1279 | internal = common->action->u.blockdev_snapshot_internal_sync.data; |
bbe86010 WX |
1280 | state = DO_UPCAST(InternalSnapshotState, common, common); |
1281 | ||
1282 | /* 1. parse input */ | |
1283 | device = internal->device; | |
1284 | name = internal->name; | |
1285 | ||
1286 | /* 2. check for validation */ | |
94d16a64 JS |
1287 | if (action_check_completion_mode(common, errp) < 0) { |
1288 | return; | |
1289 | } | |
1290 | ||
75dfd402 KW |
1291 | bs = qmp_get_root_bs(device, errp); |
1292 | if (!bs) { | |
bbe86010 WX |
1293 | return; |
1294 | } | |
1295 | ||
a36e458c SH |
1296 | aio_context = bdrv_get_aio_context(bs); |
1297 | aio_context_acquire(aio_context); | |
5d6e96ef | 1298 | |
507306cc | 1299 | state->bs = bs; |
a36e458c SH |
1300 | |
1301 | /* Paired with .clean() */ | |
507306cc FZ |
1302 | bdrv_drained_begin(bs); |
1303 | ||
3dc7ca3c | 1304 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) { |
a36e458c | 1305 | goto out; |
3dc7ca3c SH |
1306 | } |
1307 | ||
bbe86010 | 1308 | if (bdrv_is_read_only(bs)) { |
81e5f78a | 1309 | error_setg(errp, "Device '%s' is read only", device); |
a36e458c | 1310 | goto out; |
bbe86010 WX |
1311 | } |
1312 | ||
1313 | if (!bdrv_can_snapshot(bs)) { | |
81e5f78a AG |
1314 | error_setg(errp, "Block format '%s' used by device '%s' " |
1315 | "does not support internal snapshots", | |
1316 | bs->drv->format_name, device); | |
a36e458c | 1317 | goto out; |
bbe86010 WX |
1318 | } |
1319 | ||
1320 | if (!strlen(name)) { | |
1321 | error_setg(errp, "Name is empty"); | |
a36e458c | 1322 | goto out; |
bbe86010 WX |
1323 | } |
1324 | ||
1325 | /* check whether a snapshot with name exist */ | |
f70edf99 MA |
1326 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, |
1327 | &local_err); | |
1328 | if (local_err) { | |
1329 | error_propagate(errp, local_err); | |
a36e458c | 1330 | goto out; |
bbe86010 WX |
1331 | } else if (ret) { |
1332 | error_setg(errp, | |
1333 | "Snapshot with name '%s' already exists on device '%s'", | |
1334 | name, device); | |
a36e458c | 1335 | goto out; |
bbe86010 WX |
1336 | } |
1337 | ||
1338 | /* 3. take the snapshot */ | |
1339 | sn = &state->sn; | |
1340 | pstrcpy(sn->name, sizeof(sn->name), name); | |
f793dde0 MAL |
1341 | rt = g_get_real_time(); |
1342 | sn->date_sec = rt / G_USEC_PER_SEC; | |
1343 | sn->date_nsec = (rt % G_USEC_PER_SEC) * 1000; | |
bbe86010 | 1344 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
b39847a5 PD |
1345 | if (replay_mode != REPLAY_MODE_NONE) { |
1346 | sn->icount = replay_get_current_icount(); | |
1347 | } else { | |
1348 | sn->icount = -1ULL; | |
1349 | } | |
bbe86010 WX |
1350 | |
1351 | ret1 = bdrv_snapshot_create(bs, sn); | |
1352 | if (ret1 < 0) { | |
1353 | error_setg_errno(errp, -ret1, | |
1354 | "Failed to create snapshot '%s' on device '%s'", | |
1355 | name, device); | |
a36e458c | 1356 | goto out; |
bbe86010 WX |
1357 | } |
1358 | ||
1359 | /* 4. succeed, mark a snapshot is created */ | |
507306cc | 1360 | state->created = true; |
a36e458c SH |
1361 | |
1362 | out: | |
1363 | aio_context_release(aio_context); | |
bbe86010 WX |
1364 | } |
1365 | ||
50f43f0f | 1366 | static void internal_snapshot_abort(BlkActionState *common) |
bbe86010 WX |
1367 | { |
1368 | InternalSnapshotState *state = | |
1369 | DO_UPCAST(InternalSnapshotState, common, common); | |
1370 | BlockDriverState *bs = state->bs; | |
1371 | QEMUSnapshotInfo *sn = &state->sn; | |
a36e458c | 1372 | AioContext *aio_context; |
bbe86010 WX |
1373 | Error *local_error = NULL; |
1374 | ||
507306cc | 1375 | if (!state->created) { |
bbe86010 WX |
1376 | return; |
1377 | } | |
1378 | ||
a36e458c SH |
1379 | aio_context = bdrv_get_aio_context(state->bs); |
1380 | aio_context_acquire(aio_context); | |
1381 | ||
bbe86010 | 1382 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { |
c29b77f9 MA |
1383 | error_reportf_err(local_error, |
1384 | "Failed to delete snapshot with id '%s' and " | |
1385 | "name '%s' on device '%s' in abort: ", | |
1386 | sn->id_str, sn->name, | |
1387 | bdrv_get_device_name(bs)); | |
bbe86010 | 1388 | } |
a36e458c SH |
1389 | |
1390 | aio_context_release(aio_context); | |
bbe86010 WX |
1391 | } |
1392 | ||
50f43f0f | 1393 | static void internal_snapshot_clean(BlkActionState *common) |
5d6e96ef SH |
1394 | { |
1395 | InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState, | |
1396 | common, common); | |
a36e458c | 1397 | AioContext *aio_context; |
5d6e96ef | 1398 | |
a36e458c SH |
1399 | if (!state->bs) { |
1400 | return; | |
5d6e96ef | 1401 | } |
a36e458c SH |
1402 | |
1403 | aio_context = bdrv_get_aio_context(state->bs); | |
1404 | aio_context_acquire(aio_context); | |
1405 | ||
1406 | bdrv_drained_end(state->bs); | |
1407 | ||
1408 | aio_context_release(aio_context); | |
5d6e96ef SH |
1409 | } |
1410 | ||
ba0c86a3 | 1411 | /* external snapshot private data */ |
ba5d6ab6 | 1412 | typedef struct ExternalSnapshotState { |
50f43f0f | 1413 | BlkActionState common; |
8802d1fd JC |
1414 | BlockDriverState *old_bs; |
1415 | BlockDriverState *new_bs; | |
067acf28 | 1416 | bool overlay_appended; |
ba5d6ab6 | 1417 | } ExternalSnapshotState; |
8802d1fd | 1418 | |
50f43f0f | 1419 | static void external_snapshot_prepare(BlkActionState *common, |
9b9877ee WX |
1420 | Error **errp) |
1421 | { | |
934aee14 | 1422 | int ret; |
5b363937 | 1423 | int flags = 0; |
43de7e2d | 1424 | QDict *options = NULL; |
9b9877ee | 1425 | Error *local_err = NULL; |
43de7e2d | 1426 | /* Device and node name of the image to generate the snapshot from */ |
e2a31e87 | 1427 | const char *device; |
0901f67e | 1428 | const char *node_name; |
43de7e2d AG |
1429 | /* Reference to the new image (for 'blockdev-snapshot') */ |
1430 | const char *snapshot_ref; | |
1431 | /* File name of the new image (for 'blockdev-snapshot-sync') */ | |
e2a31e87 | 1432 | const char *new_image_file; |
ba5d6ab6 SH |
1433 | ExternalSnapshotState *state = |
1434 | DO_UPCAST(ExternalSnapshotState, common, common); | |
c8a83e85 | 1435 | TransactionAction *action = common->action; |
2d24b60b | 1436 | AioContext *aio_context; |
d29d3d1f | 1437 | uint64_t perm, shared; |
9b9877ee | 1438 | |
43de7e2d AG |
1439 | /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar |
1440 | * purpose but a different set of parameters */ | |
1441 | switch (action->type) { | |
1442 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: | |
1443 | { | |
32bafa8f | 1444 | BlockdevSnapshot *s = action->u.blockdev_snapshot.data; |
43de7e2d AG |
1445 | device = s->node; |
1446 | node_name = s->node; | |
1447 | new_image_file = NULL; | |
1448 | snapshot_ref = s->overlay; | |
1449 | } | |
1450 | break; | |
1451 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
1452 | { | |
32bafa8f | 1453 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
54fde4ff MA |
1454 | device = s->device; |
1455 | node_name = s->node_name; | |
43de7e2d AG |
1456 | new_image_file = s->snapshot_file; |
1457 | snapshot_ref = NULL; | |
1458 | } | |
1459 | break; | |
1460 | default: | |
1461 | g_assert_not_reached(); | |
e2a31e87 WX |
1462 | } |
1463 | ||
1464 | /* start processing */ | |
94d16a64 JS |
1465 | if (action_check_completion_mode(common, errp) < 0) { |
1466 | return; | |
1467 | } | |
1468 | ||
43de7e2d AG |
1469 | state->old_bs = bdrv_lookup_bs(device, node_name, errp); |
1470 | if (!state->old_bs) { | |
9b9877ee WX |
1471 | return; |
1472 | } | |
1473 | ||
2d24b60b SH |
1474 | aio_context = bdrv_get_aio_context(state->old_bs); |
1475 | aio_context_acquire(aio_context); | |
1476 | ||
1477 | /* Paired with .clean() */ | |
da763e83 | 1478 | bdrv_drained_begin(state->old_bs); |
5d6e96ef | 1479 | |
ba5d6ab6 | 1480 | if (!bdrv_is_inserted(state->old_bs)) { |
c6bd8c70 | 1481 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
2d24b60b | 1482 | goto out; |
9b9877ee WX |
1483 | } |
1484 | ||
3718d8ab FZ |
1485 | if (bdrv_op_is_blocked(state->old_bs, |
1486 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
2d24b60b | 1487 | goto out; |
9b9877ee WX |
1488 | } |
1489 | ||
ba5d6ab6 SH |
1490 | if (!bdrv_is_read_only(state->old_bs)) { |
1491 | if (bdrv_flush(state->old_bs)) { | |
c6bd8c70 | 1492 | error_setg(errp, QERR_IO_ERROR); |
2d24b60b | 1493 | goto out; |
9b9877ee WX |
1494 | } |
1495 | } | |
1496 | ||
43de7e2d | 1497 | if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) { |
32bafa8f | 1498 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
54fde4ff | 1499 | const char *format = s->format ?: "qcow2"; |
43de7e2d | 1500 | enum NewImageMode mode; |
54fde4ff | 1501 | const char *snapshot_node_name = s->snapshot_node_name; |
9b9877ee | 1502 | |
43de7e2d | 1503 | if (node_name && !snapshot_node_name) { |
ef2e38a1 | 1504 | error_setg(errp, "New overlay node-name missing"); |
2d24b60b | 1505 | goto out; |
9b9877ee | 1506 | } |
9b9877ee | 1507 | |
43de7e2d AG |
1508 | if (snapshot_node_name && |
1509 | bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) { | |
ef2e38a1 | 1510 | error_setg(errp, "New overlay node-name already in use"); |
2d24b60b | 1511 | goto out; |
43de7e2d AG |
1512 | } |
1513 | ||
1514 | flags = state->old_bs->open_flags; | |
2a32c6e8 JS |
1515 | flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ); |
1516 | flags |= BDRV_O_NO_BACKING; | |
43de7e2d AG |
1517 | |
1518 | /* create new image w/backing file */ | |
1519 | mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1520 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
f86b8b58 KW |
1521 | int64_t size = bdrv_getlength(state->old_bs); |
1522 | if (size < 0) { | |
1523 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2d24b60b | 1524 | goto out; |
f86b8b58 | 1525 | } |
f30c66ba | 1526 | bdrv_refresh_filename(state->old_bs); |
e1355055 KW |
1527 | |
1528 | aio_context_release(aio_context); | |
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); |
e1355055 KW |
1533 | aio_context_acquire(aio_context); |
1534 | ||
43de7e2d AG |
1535 | if (local_err) { |
1536 | error_propagate(errp, local_err); | |
2d24b60b | 1537 | goto out; |
43de7e2d AG |
1538 | } |
1539 | } | |
1540 | ||
1541 | options = qdict_new(); | |
d52e1a0e | 1542 | if (snapshot_node_name) { |
46f5ac20 | 1543 | qdict_put_str(options, "node-name", snapshot_node_name); |
43de7e2d | 1544 | } |
46f5ac20 | 1545 | qdict_put_str(options, "driver", format); |
0901f67e BC |
1546 | } |
1547 | ||
5b363937 HR |
1548 | state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags, |
1549 | errp); | |
f67503e5 | 1550 | /* We will manually add the backing_hd field to the bs later */ |
5b363937 | 1551 | if (!state->new_bs) { |
2d24b60b | 1552 | goto out; |
43de7e2d AG |
1553 | } |
1554 | ||
d29d3d1f KW |
1555 | /* |
1556 | * Allow attaching a backing file to an overlay that's already in use only | |
1557 | * if the parents don't assume that they are already seeing a valid image. | |
1558 | * (Specifically, allow it as a mirror target, which is write-only access.) | |
1559 | */ | |
1560 | bdrv_get_cumulative_perm(state->new_bs, &perm, &shared); | |
1561 | if (perm & BLK_PERM_CONSISTENT_READ) { | |
a2bb6f8c | 1562 | error_setg(errp, "The overlay is already in use"); |
2d24b60b | 1563 | goto out; |
43de7e2d AG |
1564 | } |
1565 | ||
7cc734a9 HR |
1566 | if (state->new_bs->drv->is_filter) { |
1567 | error_setg(errp, "Filters cannot be used as overlays"); | |
1568 | goto out; | |
1569 | } | |
1570 | ||
1571 | if (bdrv_cow_child(state->new_bs)) { | |
a2bb6f8c | 1572 | error_setg(errp, "The overlay already has a backing image"); |
2d24b60b | 1573 | goto out; |
08b24cfe AG |
1574 | } |
1575 | ||
1576 | if (!state->new_bs->drv->supports_backing) { | |
a2bb6f8c | 1577 | error_setg(errp, "The overlay does not support backing images"); |
2d24b60b | 1578 | goto out; |
b2c2832c KW |
1579 | } |
1580 | ||
934aee14 VSO |
1581 | ret = bdrv_append(state->new_bs, state->old_bs, errp); |
1582 | if (ret < 0) { | |
2d24b60b | 1583 | goto out; |
9b9877ee | 1584 | } |
067acf28 | 1585 | state->overlay_appended = true; |
2d24b60b SH |
1586 | |
1587 | out: | |
1588 | aio_context_release(aio_context); | |
9b9877ee WX |
1589 | } |
1590 | ||
50f43f0f | 1591 | static void external_snapshot_commit(BlkActionState *common) |
3b0047e8 | 1592 | { |
ba5d6ab6 SH |
1593 | ExternalSnapshotState *state = |
1594 | DO_UPCAST(ExternalSnapshotState, common, common); | |
2d24b60b SH |
1595 | AioContext *aio_context; |
1596 | ||
1597 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1598 | aio_context_acquire(aio_context); | |
ba0c86a3 | 1599 | |
3b0047e8 WX |
1600 | /* We don't need (or want) to use the transactional |
1601 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1602 | * don't want to abort all of them if one of them fails the reopen */ | |
d73415a3 | 1603 | if (!qatomic_read(&state->old_bs->copy_on_read)) { |
1b57774f | 1604 | bdrv_reopen_set_read_only(state->old_bs, true, NULL); |
4c844983 | 1605 | } |
2d24b60b SH |
1606 | |
1607 | aio_context_release(aio_context); | |
3b0047e8 WX |
1608 | } |
1609 | ||
50f43f0f | 1610 | static void external_snapshot_abort(BlkActionState *common) |
96b86bf7 | 1611 | { |
ba5d6ab6 SH |
1612 | ExternalSnapshotState *state = |
1613 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1614 | if (state->new_bs) { | |
067acf28 | 1615 | if (state->overlay_appended) { |
2d24b60b | 1616 | AioContext *aio_context; |
377410f6 SL |
1617 | AioContext *tmp_context; |
1618 | int ret; | |
2d24b60b SH |
1619 | |
1620 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1621 | aio_context_acquire(aio_context); | |
1622 | ||
719fc28c JC |
1623 | bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd() |
1624 | close state->old_bs; we need it */ | |
1625 | bdrv_set_backing_hd(state->new_bs, NULL, &error_abort); | |
377410f6 SL |
1626 | |
1627 | /* | |
1628 | * The call to bdrv_set_backing_hd() above returns state->old_bs to | |
1629 | * the main AioContext. As we're still going to be using it, return | |
1630 | * it to the AioContext it was before. | |
1631 | */ | |
1632 | tmp_context = bdrv_get_aio_context(state->old_bs); | |
1633 | if (aio_context != tmp_context) { | |
1634 | aio_context_release(aio_context); | |
1635 | aio_context_acquire(tmp_context); | |
1636 | ||
142e6907 EGE |
1637 | ret = bdrv_try_change_aio_context(state->old_bs, |
1638 | aio_context, NULL, NULL); | |
377410f6 SL |
1639 | assert(ret == 0); |
1640 | ||
1641 | aio_context_release(tmp_context); | |
1642 | aio_context_acquire(aio_context); | |
1643 | } | |
1644 | ||
5fe31c25 | 1645 | bdrv_replace_node(state->new_bs, state->old_bs, &error_abort); |
719fc28c | 1646 | bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */ |
2d24b60b SH |
1647 | |
1648 | aio_context_release(aio_context); | |
b2c2832c | 1649 | } |
96b86bf7 | 1650 | } |
da763e83 FZ |
1651 | } |
1652 | ||
50f43f0f | 1653 | static void external_snapshot_clean(BlkActionState *common) |
da763e83 FZ |
1654 | { |
1655 | ExternalSnapshotState *state = | |
1656 | DO_UPCAST(ExternalSnapshotState, common, common); | |
2d24b60b SH |
1657 | AioContext *aio_context; |
1658 | ||
1659 | if (!state->old_bs) { | |
1660 | return; | |
5d6e96ef | 1661 | } |
2d24b60b SH |
1662 | |
1663 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1664 | aio_context_acquire(aio_context); | |
1665 | ||
1666 | bdrv_drained_end(state->old_bs); | |
1667 | bdrv_unref(state->new_bs); | |
1668 | ||
1669 | aio_context_release(aio_context); | |
96b86bf7 WX |
1670 | } |
1671 | ||
3037f364 | 1672 | typedef struct DriveBackupState { |
50f43f0f | 1673 | BlkActionState common; |
3037f364 SH |
1674 | BlockDriverState *bs; |
1675 | BlockJob *job; | |
1676 | } DriveBackupState; | |
1677 | ||
2288ccfa SL |
1678 | static BlockJob *do_backup_common(BackupCommon *backup, |
1679 | BlockDriverState *bs, | |
1680 | BlockDriverState *target_bs, | |
1681 | AioContext *aio_context, | |
1682 | JobTxn *txn, Error **errp); | |
78f51fde | 1683 | |
50f43f0f | 1684 | static void drive_backup_prepare(BlkActionState *common, Error **errp) |
3037f364 SH |
1685 | { |
1686 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1687 | DriveBackup *backup; | |
2288ccfa SL |
1688 | BlockDriverState *bs; |
1689 | BlockDriverState *target_bs; | |
1690 | BlockDriverState *source = NULL; | |
66d56054 | 1691 | AioContext *aio_context; |
3ea67e08 | 1692 | AioContext *old_context; |
04658a5b | 1693 | const char *format; |
2288ccfa | 1694 | QDict *options; |
3037f364 | 1695 | Error *local_err = NULL; |
2288ccfa SL |
1696 | int flags; |
1697 | int64_t size; | |
1698 | bool set_backing_hd = false; | |
3ea67e08 | 1699 | int ret; |
3037f364 | 1700 | |
6a8f9661 | 1701 | assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
32bafa8f | 1702 | backup = common->action->u.drive_backup.data; |
3037f364 | 1703 | |
2288ccfa SL |
1704 | if (!backup->has_mode) { |
1705 | backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1706 | } | |
1707 | ||
85c9d133 | 1708 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
b7e4fa22 | 1709 | if (!bs) { |
1fdd4b7b FZ |
1710 | return; |
1711 | } | |
1712 | ||
2288ccfa SL |
1713 | if (!bs->drv) { |
1714 | error_setg(errp, "Device has no medium"); | |
1715 | return; | |
1716 | } | |
1717 | ||
66d56054 SH |
1718 | aio_context = bdrv_get_aio_context(bs); |
1719 | aio_context_acquire(aio_context); | |
1720 | ||
2842ff2d | 1721 | state->bs = bs; |
66d56054 | 1722 | /* Paired with .clean() */ |
b7e4fa22 | 1723 | bdrv_drained_begin(bs); |
66d56054 | 1724 | |
04658a5b MA |
1725 | format = backup->format; |
1726 | if (!format && backup->mode != NEW_IMAGE_MODE_EXISTING) { | |
1727 | format = bs->drv->format_name; | |
2288ccfa SL |
1728 | } |
1729 | ||
1730 | /* Early check to avoid creating target */ | |
1731 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { | |
1732 | goto out; | |
1733 | } | |
1734 | ||
1735 | flags = bs->open_flags | BDRV_O_RDWR; | |
1736 | ||
1737 | /* | |
1738 | * See if we have a backing HD we can use to create our new image | |
1739 | * on top of. | |
1740 | */ | |
1741 | if (backup->sync == MIRROR_SYNC_MODE_TOP) { | |
2b088c60 HR |
1742 | /* |
1743 | * Backup will not replace the source by the target, so none | |
1744 | * of the filters skipped here will be removed (in contrast to | |
1745 | * mirror). Therefore, we can skip all of them when looking | |
1746 | * for the first COW relationship. | |
1747 | */ | |
1748 | source = bdrv_cow_bs(bdrv_skip_filters(bs)); | |
2288ccfa SL |
1749 | if (!source) { |
1750 | backup->sync = MIRROR_SYNC_MODE_FULL; | |
1751 | } | |
1752 | } | |
1753 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
1754 | source = bs; | |
1755 | flags |= BDRV_O_NO_BACKING; | |
1756 | set_backing_hd = true; | |
1757 | } | |
1758 | ||
1759 | size = bdrv_getlength(bs); | |
1760 | if (size < 0) { | |
1761 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1762 | goto out; | |
1763 | } | |
1764 | ||
1765 | if (backup->mode != NEW_IMAGE_MODE_EXISTING) { | |
04658a5b | 1766 | assert(format); |
2288ccfa | 1767 | if (source) { |
2b088c60 HR |
1768 | /* Implicit filters should not appear in the filename */ |
1769 | BlockDriverState *explicit_backing = | |
1770 | bdrv_skip_implicit_filters(source); | |
1771 | ||
1772 | bdrv_refresh_filename(explicit_backing); | |
04658a5b | 1773 | bdrv_img_create(backup->target, format, |
2b088c60 HR |
1774 | explicit_backing->filename, |
1775 | explicit_backing->drv->format_name, NULL, | |
2288ccfa SL |
1776 | size, flags, false, &local_err); |
1777 | } else { | |
04658a5b | 1778 | bdrv_img_create(backup->target, format, NULL, NULL, NULL, |
2288ccfa SL |
1779 | size, flags, false, &local_err); |
1780 | } | |
1781 | } | |
5d6e96ef | 1782 | |
84d18f06 | 1783 | if (local_err) { |
3037f364 | 1784 | error_propagate(errp, local_err); |
66d56054 | 1785 | goto out; |
3037f364 | 1786 | } |
66d56054 | 1787 | |
2288ccfa SL |
1788 | options = qdict_new(); |
1789 | qdict_put_str(options, "discard", "unmap"); | |
1790 | qdict_put_str(options, "detect-zeroes", "unmap"); | |
04658a5b MA |
1791 | if (format) { |
1792 | qdict_put_str(options, "driver", format); | |
2288ccfa SL |
1793 | } |
1794 | ||
1795 | target_bs = bdrv_open(backup->target, NULL, options, flags, errp); | |
1796 | if (!target_bs) { | |
1797 | goto out; | |
1798 | } | |
1799 | ||
142e6907 | 1800 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
3ea67e08 SL |
1801 | old_context = bdrv_get_aio_context(target_bs); |
1802 | aio_context_release(aio_context); | |
1803 | aio_context_acquire(old_context); | |
1804 | ||
142e6907 | 1805 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
3ea67e08 SL |
1806 | if (ret < 0) { |
1807 | bdrv_unref(target_bs); | |
1808 | aio_context_release(old_context); | |
1809 | return; | |
1810 | } | |
1811 | ||
1812 | aio_context_release(old_context); | |
1813 | aio_context_acquire(aio_context); | |
1814 | ||
2288ccfa | 1815 | if (set_backing_hd) { |
5a11a1ca | 1816 | if (bdrv_set_backing_hd(target_bs, source, errp) < 0) { |
2288ccfa SL |
1817 | goto unref; |
1818 | } | |
1819 | } | |
1820 | ||
2288ccfa SL |
1821 | state->job = do_backup_common(qapi_DriveBackup_base(backup), |
1822 | bs, target_bs, aio_context, | |
1823 | common->block_job_txn, errp); | |
1824 | ||
1825 | unref: | |
1826 | bdrv_unref(target_bs); | |
66d56054 SH |
1827 | out: |
1828 | aio_context_release(aio_context); | |
111049a4 | 1829 | } |
3037f364 | 1830 | |
111049a4 JS |
1831 | static void drive_backup_commit(BlkActionState *common) |
1832 | { | |
1833 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
66d56054 SH |
1834 | AioContext *aio_context; |
1835 | ||
1836 | aio_context = bdrv_get_aio_context(state->bs); | |
1837 | aio_context_acquire(aio_context); | |
1838 | ||
111049a4 | 1839 | assert(state->job); |
da01ff7f | 1840 | job_start(&state->job->job); |
66d56054 SH |
1841 | |
1842 | aio_context_release(aio_context); | |
3037f364 SH |
1843 | } |
1844 | ||
50f43f0f | 1845 | static void drive_backup_abort(BlkActionState *common) |
3037f364 SH |
1846 | { |
1847 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
3037f364 | 1848 | |
111049a4 | 1849 | if (state->job) { |
4cfb3f05 | 1850 | job_cancel_sync(&state->job->job, true); |
3037f364 SH |
1851 | } |
1852 | } | |
1853 | ||
50f43f0f | 1854 | static void drive_backup_clean(BlkActionState *common) |
5d6e96ef SH |
1855 | { |
1856 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
66d56054 | 1857 | AioContext *aio_context; |
5d6e96ef | 1858 | |
66d56054 SH |
1859 | if (!state->bs) { |
1860 | return; | |
5d6e96ef | 1861 | } |
66d56054 SH |
1862 | |
1863 | aio_context = bdrv_get_aio_context(state->bs); | |
1864 | aio_context_acquire(aio_context); | |
1865 | ||
1866 | bdrv_drained_end(state->bs); | |
1867 | ||
1868 | aio_context_release(aio_context); | |
5d6e96ef SH |
1869 | } |
1870 | ||
bd8baecd | 1871 | typedef struct BlockdevBackupState { |
50f43f0f | 1872 | BlkActionState common; |
bd8baecd FZ |
1873 | BlockDriverState *bs; |
1874 | BlockJob *job; | |
bd8baecd FZ |
1875 | } BlockdevBackupState; |
1876 | ||
50f43f0f | 1877 | static void blockdev_backup_prepare(BlkActionState *common, Error **errp) |
bd8baecd FZ |
1878 | { |
1879 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1880 | BlockdevBackup *backup; | |
5b7bfe51 SL |
1881 | BlockDriverState *bs; |
1882 | BlockDriverState *target_bs; | |
edd5adee | 1883 | AioContext *aio_context; |
3ea67e08 SL |
1884 | AioContext *old_context; |
1885 | int ret; | |
bd8baecd | 1886 | |
6a8f9661 | 1887 | assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP); |
32bafa8f | 1888 | backup = common->action->u.blockdev_backup.data; |
bd8baecd | 1889 | |
930fe17f | 1890 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
cef34eeb | 1891 | if (!bs) { |
ff52bf36 FZ |
1892 | return; |
1893 | } | |
1894 | ||
5b7bfe51 SL |
1895 | target_bs = bdrv_lookup_bs(backup->target, backup->target, errp); |
1896 | if (!target_bs) { | |
bd8baecd FZ |
1897 | return; |
1898 | } | |
1899 | ||
142e6907 | 1900 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
edd5adee | 1901 | aio_context = bdrv_get_aio_context(bs); |
3ea67e08 SL |
1902 | old_context = bdrv_get_aio_context(target_bs); |
1903 | aio_context_acquire(old_context); | |
1904 | ||
142e6907 | 1905 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
3ea67e08 SL |
1906 | if (ret < 0) { |
1907 | aio_context_release(old_context); | |
1908 | return; | |
1909 | } | |
1910 | ||
1911 | aio_context_release(old_context); | |
edd5adee | 1912 | aio_context_acquire(aio_context); |
cef34eeb | 1913 | state->bs = bs; |
edd5adee SH |
1914 | |
1915 | /* Paired with .clean() */ | |
ff52bf36 | 1916 | bdrv_drained_begin(state->bs); |
bd8baecd | 1917 | |
5b7bfe51 SL |
1918 | state->job = do_backup_common(qapi_BlockdevBackup_base(backup), |
1919 | bs, target_bs, aio_context, | |
1920 | common->block_job_txn, errp); | |
edd5adee | 1921 | |
edd5adee | 1922 | aio_context_release(aio_context); |
111049a4 | 1923 | } |
bd8baecd | 1924 | |
111049a4 JS |
1925 | static void blockdev_backup_commit(BlkActionState *common) |
1926 | { | |
1927 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
edd5adee SH |
1928 | AioContext *aio_context; |
1929 | ||
1930 | aio_context = bdrv_get_aio_context(state->bs); | |
1931 | aio_context_acquire(aio_context); | |
1932 | ||
111049a4 | 1933 | assert(state->job); |
da01ff7f | 1934 | job_start(&state->job->job); |
edd5adee SH |
1935 | |
1936 | aio_context_release(aio_context); | |
bd8baecd FZ |
1937 | } |
1938 | ||
50f43f0f | 1939 | static void blockdev_backup_abort(BlkActionState *common) |
bd8baecd FZ |
1940 | { |
1941 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
bd8baecd | 1942 | |
111049a4 | 1943 | if (state->job) { |
4cfb3f05 | 1944 | job_cancel_sync(&state->job->job, true); |
bd8baecd FZ |
1945 | } |
1946 | } | |
1947 | ||
50f43f0f | 1948 | static void blockdev_backup_clean(BlkActionState *common) |
bd8baecd FZ |
1949 | { |
1950 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
edd5adee | 1951 | AioContext *aio_context; |
bd8baecd | 1952 | |
edd5adee SH |
1953 | if (!state->bs) { |
1954 | return; | |
bd8baecd | 1955 | } |
edd5adee SH |
1956 | |
1957 | aio_context = bdrv_get_aio_context(state->bs); | |
1958 | aio_context_acquire(aio_context); | |
1959 | ||
1960 | bdrv_drained_end(state->bs); | |
1961 | ||
1962 | aio_context_release(aio_context); | |
bd8baecd FZ |
1963 | } |
1964 | ||
df9a681d | 1965 | typedef struct BlockDirtyBitmapState { |
50f43f0f | 1966 | BlkActionState common; |
df9a681d FZ |
1967 | BdrvDirtyBitmap *bitmap; |
1968 | BlockDriverState *bs; | |
df9a681d FZ |
1969 | HBitmap *backup; |
1970 | bool prepared; | |
c6490447 | 1971 | bool was_enabled; |
df9a681d FZ |
1972 | } BlockDirtyBitmapState; |
1973 | ||
50f43f0f | 1974 | static void block_dirty_bitmap_add_prepare(BlkActionState *common, |
df9a681d FZ |
1975 | Error **errp) |
1976 | { | |
1977 | Error *local_err = NULL; | |
1978 | BlockDirtyBitmapAdd *action; | |
1979 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
1980 | common, common); | |
1981 | ||
94d16a64 JS |
1982 | if (action_check_completion_mode(common, errp) < 0) { |
1983 | return; | |
1984 | } | |
1985 | ||
32bafa8f | 1986 | action = common->action->u.block_dirty_bitmap_add.data; |
df9a681d FZ |
1987 | /* AIO context taken and released within qmp_block_dirty_bitmap_add */ |
1988 | qmp_block_dirty_bitmap_add(action->node, action->name, | |
1989 | action->has_granularity, action->granularity, | |
fd5ae4cc | 1990 | action->has_persistent, action->persistent, |
0e2b7f09 | 1991 | action->has_disabled, action->disabled, |
df9a681d FZ |
1992 | &local_err); |
1993 | ||
1994 | if (!local_err) { | |
1995 | state->prepared = true; | |
1996 | } else { | |
1997 | error_propagate(errp, local_err); | |
1998 | } | |
1999 | } | |
2000 | ||
50f43f0f | 2001 | static void block_dirty_bitmap_add_abort(BlkActionState *common) |
df9a681d FZ |
2002 | { |
2003 | BlockDirtyBitmapAdd *action; | |
2004 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2005 | common, common); | |
2006 | ||
32bafa8f | 2007 | action = common->action->u.block_dirty_bitmap_add.data; |
df9a681d FZ |
2008 | /* Should not be able to fail: IF the bitmap was added via .prepare(), |
2009 | * then the node reference and bitmap name must have been valid. | |
2010 | */ | |
2011 | if (state->prepared) { | |
2012 | qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort); | |
2013 | } | |
2014 | } | |
2015 | ||
50f43f0f | 2016 | static void block_dirty_bitmap_clear_prepare(BlkActionState *common, |
df9a681d FZ |
2017 | Error **errp) |
2018 | { | |
2019 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2020 | common, common); | |
2021 | BlockDirtyBitmap *action; | |
2022 | ||
94d16a64 JS |
2023 | if (action_check_completion_mode(common, errp) < 0) { |
2024 | return; | |
2025 | } | |
2026 | ||
32bafa8f | 2027 | action = common->action->u.block_dirty_bitmap_clear.data; |
df9a681d FZ |
2028 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2029 | action->name, | |
2030 | &state->bs, | |
df9a681d FZ |
2031 | errp); |
2032 | if (!state->bitmap) { | |
2033 | return; | |
2034 | } | |
2035 | ||
3ae96d66 | 2036 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_DEFAULT, errp)) { |
d6883bc9 | 2037 | return; |
df9a681d FZ |
2038 | } |
2039 | ||
2040 | bdrv_clear_dirty_bitmap(state->bitmap, &state->backup); | |
df9a681d FZ |
2041 | } |
2042 | ||
5c4cf8b2 | 2043 | static void block_dirty_bitmap_restore(BlkActionState *common) |
df9a681d FZ |
2044 | { |
2045 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2046 | common, common); | |
2047 | ||
184dd9c4 | 2048 | if (state->backup) { |
56bd6624 | 2049 | bdrv_restore_dirty_bitmap(state->bitmap, state->backup); |
184dd9c4 | 2050 | } |
df9a681d FZ |
2051 | } |
2052 | ||
5c4cf8b2 | 2053 | static void block_dirty_bitmap_free_backup(BlkActionState *common) |
df9a681d FZ |
2054 | { |
2055 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2056 | common, common); | |
2057 | ||
2058 | hbitmap_free(state->backup); | |
2059 | } | |
2060 | ||
c6490447 VSO |
2061 | static void block_dirty_bitmap_enable_prepare(BlkActionState *common, |
2062 | Error **errp) | |
2063 | { | |
2064 | BlockDirtyBitmap *action; | |
2065 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2066 | common, common); | |
2067 | ||
2068 | if (action_check_completion_mode(common, errp) < 0) { | |
2069 | return; | |
2070 | } | |
2071 | ||
0e2b7f09 | 2072 | action = common->action->u.block_dirty_bitmap_enable.data; |
c6490447 VSO |
2073 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2074 | action->name, | |
2075 | NULL, | |
2076 | errp); | |
2077 | if (!state->bitmap) { | |
2078 | return; | |
2079 | } | |
2080 | ||
3ae96d66 | 2081 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
b053bb55 JS |
2082 | return; |
2083 | } | |
2084 | ||
c6490447 VSO |
2085 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2086 | bdrv_enable_dirty_bitmap(state->bitmap); | |
2087 | } | |
2088 | ||
2089 | static void block_dirty_bitmap_enable_abort(BlkActionState *common) | |
2090 | { | |
2091 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2092 | common, common); | |
2093 | ||
2094 | if (!state->was_enabled) { | |
2095 | bdrv_disable_dirty_bitmap(state->bitmap); | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | static void block_dirty_bitmap_disable_prepare(BlkActionState *common, | |
2100 | Error **errp) | |
2101 | { | |
2102 | BlockDirtyBitmap *action; | |
2103 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2104 | common, common); | |
2105 | ||
2106 | if (action_check_completion_mode(common, errp) < 0) { | |
2107 | return; | |
2108 | } | |
2109 | ||
0e2b7f09 | 2110 | action = common->action->u.block_dirty_bitmap_disable.data; |
c6490447 VSO |
2111 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2112 | action->name, | |
2113 | NULL, | |
2114 | errp); | |
2115 | if (!state->bitmap) { | |
2116 | return; | |
2117 | } | |
2118 | ||
3ae96d66 | 2119 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
b053bb55 JS |
2120 | return; |
2121 | } | |
2122 | ||
c6490447 VSO |
2123 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2124 | bdrv_disable_dirty_bitmap(state->bitmap); | |
2125 | } | |
2126 | ||
2127 | static void block_dirty_bitmap_disable_abort(BlkActionState *common) | |
2128 | { | |
2129 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2130 | common, common); | |
2131 | ||
2132 | if (state->was_enabled) { | |
2133 | bdrv_enable_dirty_bitmap(state->bitmap); | |
2134 | } | |
2135 | } | |
2136 | ||
6fd2e407 VSO |
2137 | static void block_dirty_bitmap_merge_prepare(BlkActionState *common, |
2138 | Error **errp) | |
2139 | { | |
2140 | BlockDirtyBitmapMerge *action; | |
2141 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2142 | common, common); | |
6fd2e407 VSO |
2143 | |
2144 | if (action_check_completion_mode(common, errp) < 0) { | |
2145 | return; | |
2146 | } | |
2147 | ||
0e2b7f09 | 2148 | action = common->action->u.block_dirty_bitmap_merge.data; |
6fd2e407 | 2149 | |
c6996cf9 EB |
2150 | state->bitmap = block_dirty_bitmap_merge(action->node, action->target, |
2151 | action->bitmaps, &state->backup, | |
2152 | errp); | |
6fd2e407 VSO |
2153 | } |
2154 | ||
c4e4b0fa JS |
2155 | static void block_dirty_bitmap_remove_prepare(BlkActionState *common, |
2156 | Error **errp) | |
2157 | { | |
2158 | BlockDirtyBitmap *action; | |
2159 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2160 | common, common); | |
2161 | ||
2162 | if (action_check_completion_mode(common, errp) < 0) { | |
2163 | return; | |
2164 | } | |
2165 | ||
2166 | action = common->action->u.block_dirty_bitmap_remove.data; | |
2167 | ||
c6996cf9 EB |
2168 | state->bitmap = block_dirty_bitmap_remove(action->node, action->name, |
2169 | false, &state->bs, errp); | |
c4e4b0fa JS |
2170 | if (state->bitmap) { |
2171 | bdrv_dirty_bitmap_skip_store(state->bitmap, true); | |
2172 | bdrv_dirty_bitmap_set_busy(state->bitmap, true); | |
2173 | } | |
2174 | } | |
2175 | ||
2176 | static void block_dirty_bitmap_remove_abort(BlkActionState *common) | |
2177 | { | |
2178 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2179 | common, common); | |
2180 | ||
2181 | if (state->bitmap) { | |
2182 | bdrv_dirty_bitmap_skip_store(state->bitmap, false); | |
2183 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
2184 | } | |
2185 | } | |
2186 | ||
2187 | static void block_dirty_bitmap_remove_commit(BlkActionState *common) | |
2188 | { | |
2189 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2190 | common, common); | |
2191 | ||
2192 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
5deb6cbd | 2193 | bdrv_release_dirty_bitmap(state->bitmap); |
c4e4b0fa JS |
2194 | } |
2195 | ||
50f43f0f | 2196 | static void abort_prepare(BlkActionState *common, Error **errp) |
78b18b78 SH |
2197 | { |
2198 | error_setg(errp, "Transaction aborted using Abort action"); | |
2199 | } | |
2200 | ||
50f43f0f | 2201 | static void abort_commit(BlkActionState *common) |
78b18b78 | 2202 | { |
dfc6f865 | 2203 | g_assert_not_reached(); /* this action never succeeds */ |
78b18b78 SH |
2204 | } |
2205 | ||
50f43f0f | 2206 | static const BlkActionOps actions[] = { |
43de7e2d AG |
2207 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = { |
2208 | .instance_size = sizeof(ExternalSnapshotState), | |
2209 | .prepare = external_snapshot_prepare, | |
2210 | .commit = external_snapshot_commit, | |
2211 | .abort = external_snapshot_abort, | |
4ad6f3db | 2212 | .clean = external_snapshot_clean, |
43de7e2d | 2213 | }, |
c8a83e85 | 2214 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
ba5d6ab6 | 2215 | .instance_size = sizeof(ExternalSnapshotState), |
ba0c86a3 WX |
2216 | .prepare = external_snapshot_prepare, |
2217 | .commit = external_snapshot_commit, | |
2218 | .abort = external_snapshot_abort, | |
da763e83 | 2219 | .clean = external_snapshot_clean, |
ba0c86a3 | 2220 | }, |
3037f364 SH |
2221 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
2222 | .instance_size = sizeof(DriveBackupState), | |
2223 | .prepare = drive_backup_prepare, | |
111049a4 | 2224 | .commit = drive_backup_commit, |
3037f364 | 2225 | .abort = drive_backup_abort, |
5d6e96ef | 2226 | .clean = drive_backup_clean, |
3037f364 | 2227 | }, |
bd8baecd FZ |
2228 | [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = { |
2229 | .instance_size = sizeof(BlockdevBackupState), | |
2230 | .prepare = blockdev_backup_prepare, | |
111049a4 | 2231 | .commit = blockdev_backup_commit, |
bd8baecd FZ |
2232 | .abort = blockdev_backup_abort, |
2233 | .clean = blockdev_backup_clean, | |
2234 | }, | |
78b18b78 | 2235 | [TRANSACTION_ACTION_KIND_ABORT] = { |
50f43f0f | 2236 | .instance_size = sizeof(BlkActionState), |
78b18b78 SH |
2237 | .prepare = abort_prepare, |
2238 | .commit = abort_commit, | |
2239 | }, | |
bbe86010 WX |
2240 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
2241 | .instance_size = sizeof(InternalSnapshotState), | |
2242 | .prepare = internal_snapshot_prepare, | |
2243 | .abort = internal_snapshot_abort, | |
5d6e96ef | 2244 | .clean = internal_snapshot_clean, |
bbe86010 | 2245 | }, |
df9a681d FZ |
2246 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = { |
2247 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2248 | .prepare = block_dirty_bitmap_add_prepare, | |
2249 | .abort = block_dirty_bitmap_add_abort, | |
2250 | }, | |
2251 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = { | |
2252 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2253 | .prepare = block_dirty_bitmap_clear_prepare, | |
5c4cf8b2 VSO |
2254 | .commit = block_dirty_bitmap_free_backup, |
2255 | .abort = block_dirty_bitmap_restore, | |
c6490447 | 2256 | }, |
0e2b7f09 | 2257 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = { |
c6490447 VSO |
2258 | .instance_size = sizeof(BlockDirtyBitmapState), |
2259 | .prepare = block_dirty_bitmap_enable_prepare, | |
2260 | .abort = block_dirty_bitmap_enable_abort, | |
2261 | }, | |
0e2b7f09 | 2262 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = { |
c6490447 VSO |
2263 | .instance_size = sizeof(BlockDirtyBitmapState), |
2264 | .prepare = block_dirty_bitmap_disable_prepare, | |
2265 | .abort = block_dirty_bitmap_disable_abort, | |
66da04dd | 2266 | }, |
0e2b7f09 | 2267 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = { |
6fd2e407 VSO |
2268 | .instance_size = sizeof(BlockDirtyBitmapState), |
2269 | .prepare = block_dirty_bitmap_merge_prepare, | |
2270 | .commit = block_dirty_bitmap_free_backup, | |
2271 | .abort = block_dirty_bitmap_restore, | |
2272 | }, | |
c4e4b0fa JS |
2273 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE] = { |
2274 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2275 | .prepare = block_dirty_bitmap_remove_prepare, | |
2276 | .commit = block_dirty_bitmap_remove_commit, | |
2277 | .abort = block_dirty_bitmap_remove_abort, | |
2278 | }, | |
66da04dd JS |
2279 | /* Where are transactions for MIRROR, COMMIT and STREAM? |
2280 | * Although these blockjobs use transaction callbacks like the backup job, | |
2281 | * these jobs do not necessarily adhere to transaction semantics. | |
2282 | * These jobs may not fully undo all of their actions on abort, nor do they | |
2283 | * necessarily work in transactions with more than one job in them. | |
2284 | */ | |
ba0c86a3 WX |
2285 | }; |
2286 | ||
94d16a64 JS |
2287 | /** |
2288 | * Allocate a TransactionProperties structure if necessary, and fill | |
2289 | * that structure with desired defaults if they are unset. | |
2290 | */ | |
2291 | static TransactionProperties *get_transaction_properties( | |
2292 | TransactionProperties *props) | |
2293 | { | |
2294 | if (!props) { | |
2295 | props = g_new0(TransactionProperties, 1); | |
2296 | } | |
2297 | ||
2298 | if (!props->has_completion_mode) { | |
2299 | props->has_completion_mode = true; | |
2300 | props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL; | |
2301 | } | |
2302 | ||
2303 | return props; | |
2304 | } | |
2305 | ||
8802d1fd | 2306 | /* |
b756b9ce SH |
2307 | * 'Atomic' group operations. The operations are performed as a set, and if |
2308 | * any fail then we roll back all operations in the group. | |
ebc2752b EGE |
2309 | * |
2310 | * Always run under BQL. | |
8802d1fd | 2311 | */ |
94d16a64 | 2312 | void qmp_transaction(TransactionActionList *dev_list, |
94d16a64 JS |
2313 | struct TransactionProperties *props, |
2314 | Error **errp) | |
8802d1fd | 2315 | { |
c8a83e85 | 2316 | TransactionActionList *dev_entry = dev_list; |
238e9202 | 2317 | bool has_props = !!props; |
62c9e416 | 2318 | JobTxn *block_job_txn = NULL; |
50f43f0f | 2319 | BlkActionState *state, *next; |
43e17041 | 2320 | Error *local_err = NULL; |
8802d1fd | 2321 | |
b4ad82aa EGE |
2322 | GLOBAL_STATE_CODE(); |
2323 | ||
f4de0f8c JS |
2324 | QTAILQ_HEAD(, BlkActionState) snap_bdrv_states; |
2325 | QTAILQ_INIT(&snap_bdrv_states); | |
8802d1fd | 2326 | |
94d16a64 | 2327 | /* Does this transaction get canceled as a group on failure? |
62c9e416 | 2328 | * If not, we don't really need to make a JobTxn. |
94d16a64 JS |
2329 | */ |
2330 | props = get_transaction_properties(props); | |
2331 | if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
7eaa8fb5 | 2332 | block_job_txn = job_txn_new(); |
94d16a64 JS |
2333 | } |
2334 | ||
b756b9ce | 2335 | /* drain all i/o before any operations */ |
8802d1fd JC |
2336 | bdrv_drain_all(); |
2337 | ||
b756b9ce | 2338 | /* We don't do anything in this loop that commits us to the operations */ |
8802d1fd | 2339 | while (NULL != dev_entry) { |
c8a83e85 | 2340 | TransactionAction *dev_info = NULL; |
50f43f0f | 2341 | const BlkActionOps *ops; |
52e7c241 | 2342 | |
8802d1fd JC |
2343 | dev_info = dev_entry->value; |
2344 | dev_entry = dev_entry->next; | |
2345 | ||
6a8f9661 | 2346 | assert(dev_info->type < ARRAY_SIZE(actions)); |
ba0c86a3 | 2347 | |
6a8f9661 | 2348 | ops = &actions[dev_info->type]; |
aa3fe714 HR |
2349 | assert(ops->instance_size > 0); |
2350 | ||
ba5d6ab6 SH |
2351 | state = g_malloc0(ops->instance_size); |
2352 | state->ops = ops; | |
2353 | state->action = dev_info; | |
94d16a64 JS |
2354 | state->block_job_txn = block_job_txn; |
2355 | state->txn_props = props; | |
f4de0f8c | 2356 | QTAILQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
8802d1fd | 2357 | |
ba5d6ab6 | 2358 | state->ops->prepare(state, &local_err); |
84d18f06 | 2359 | if (local_err) { |
ba0c86a3 WX |
2360 | error_propagate(errp, local_err); |
2361 | goto delete_and_fail; | |
8802d1fd | 2362 | } |
8802d1fd JC |
2363 | } |
2364 | ||
f4de0f8c | 2365 | QTAILQ_FOREACH(state, &snap_bdrv_states, entry) { |
f9ea81e8 SH |
2366 | if (state->ops->commit) { |
2367 | state->ops->commit(state); | |
2368 | } | |
8802d1fd JC |
2369 | } |
2370 | ||
2371 | /* success */ | |
2372 | goto exit; | |
2373 | ||
2374 | delete_and_fail: | |
b756b9ce | 2375 | /* failure, and it is all-or-none; roll back all operations */ |
f4de0f8c | 2376 | QTAILQ_FOREACH_REVERSE(state, &snap_bdrv_states, entry) { |
ba5d6ab6 SH |
2377 | if (state->ops->abort) { |
2378 | state->ops->abort(state); | |
ba0c86a3 | 2379 | } |
8802d1fd JC |
2380 | } |
2381 | exit: | |
f4de0f8c | 2382 | QTAILQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
ba5d6ab6 SH |
2383 | if (state->ops->clean) { |
2384 | state->ops->clean(state); | |
ba0c86a3 | 2385 | } |
ba5d6ab6 | 2386 | g_free(state); |
8802d1fd | 2387 | } |
94d16a64 JS |
2388 | if (!has_props) { |
2389 | qapi_free_TransactionProperties(props); | |
2390 | } | |
7eaa8fb5 | 2391 | job_txn_unref(block_job_txn); |
8802d1fd JC |
2392 | } |
2393 | ||
a3b52535 VSO |
2394 | BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node, |
2395 | const char *name, | |
2396 | Error **errp) | |
2397 | { | |
2398 | BdrvDirtyBitmap *bitmap; | |
2399 | BlockDriverState *bs; | |
2400 | BlockDirtyBitmapSha256 *ret = NULL; | |
2401 | char *sha256; | |
2402 | ||
2403 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); | |
2404 | if (!bitmap || !bs) { | |
2405 | return NULL; | |
2406 | } | |
2407 | ||
2408 | sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp); | |
2409 | if (sha256 == NULL) { | |
2410 | return NULL; | |
2411 | } | |
2412 | ||
2413 | ret = g_new(BlockDirtyBitmapSha256, 1); | |
2414 | ret->sha256 = sha256; | |
2415 | ||
2416 | return ret; | |
2417 | } | |
2418 | ||
54fde4ff | 2419 | void coroutine_fn qmp_block_resize(const char *device, const char *node_name, |
eb94b81a | 2420 | int64_t size, Error **errp) |
6d4a2b3a | 2421 | { |
3b1dbd11 | 2422 | Error *local_err = NULL; |
d9dbf25f | 2423 | BlockBackend *blk; |
6d4a2b3a | 2424 | BlockDriverState *bs; |
eb94b81a | 2425 | AioContext *old_ctx; |
6d4a2b3a | 2426 | |
54fde4ff | 2427 | bs = bdrv_lookup_bs(device, node_name, &local_err); |
84d18f06 | 2428 | if (local_err) { |
3b1dbd11 BC |
2429 | error_propagate(errp, local_err); |
2430 | return; | |
2431 | } | |
2432 | ||
6d4a2b3a | 2433 | if (size < 0) { |
c6bd8c70 | 2434 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
d9dbf25f | 2435 | return; |
6d4a2b3a CH |
2436 | } |
2437 | ||
9c75e168 | 2438 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { |
c6bd8c70 | 2439 | error_setg(errp, QERR_DEVICE_IN_USE, device); |
d9dbf25f | 2440 | return; |
9c75e168 JC |
2441 | } |
2442 | ||
0c7d204f | 2443 | blk = blk_co_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, errp); |
a3aeeab5 | 2444 | if (!blk) { |
d9dbf25f | 2445 | return; |
d7086422 | 2446 | } |
7dad9ee6 | 2447 | |
8089eab2 | 2448 | bdrv_co_lock(bs); |
698bdfa0 | 2449 | bdrv_drained_begin(bs); |
8089eab2 KW |
2450 | bdrv_co_unlock(bs); |
2451 | ||
eb94b81a | 2452 | old_ctx = bdrv_co_enter(bs); |
247cf5c0 | 2453 | blk_co_truncate(blk, size, false, PREALLOC_MODE_OFF, 0, errp); |
eb94b81a | 2454 | bdrv_co_leave(bs, old_ctx); |
927e0e76 | 2455 | |
eb94b81a | 2456 | bdrv_co_lock(bs); |
8089eab2 | 2457 | bdrv_drained_end(bs); |
0c7d204f | 2458 | blk_co_unref(blk); |
eb94b81a | 2459 | bdrv_co_unlock(bs); |
6d4a2b3a | 2460 | } |
12bd451f | 2461 | |
54fde4ff MA |
2462 | void qmp_block_stream(const char *job_id, const char *device, |
2463 | const char *base, | |
2464 | const char *base_node, | |
2465 | const char *backing_file, | |
2466 | const char *bottom, | |
13d8cc51 | 2467 | bool has_speed, int64_t speed, |
1d809098 | 2468 | bool has_on_error, BlockdevOnError on_error, |
54fde4ff | 2469 | const char *filter_node_name, |
241ca1ab JS |
2470 | bool has_auto_finalize, bool auto_finalize, |
2471 | bool has_auto_dismiss, bool auto_dismiss, | |
1d809098 | 2472 | Error **errp) |
12bd451f | 2473 | { |
7f4a396d | 2474 | BlockDriverState *bs, *iter, *iter_end; |
c8c3080f | 2475 | BlockDriverState *base_bs = NULL; |
7f4a396d | 2476 | BlockDriverState *bottom_bs = NULL; |
f3e69beb | 2477 | AioContext *aio_context; |
fd7f8c65 | 2478 | Error *local_err = NULL; |
cf6320df | 2479 | int job_flags = JOB_DEFAULT; |
12bd451f | 2480 | |
54fde4ff | 2481 | if (base && base_node) { |
7f4a396d VSO |
2482 | error_setg(errp, "'base' and 'base-node' cannot be specified " |
2483 | "at the same time"); | |
2484 | return; | |
2485 | } | |
2486 | ||
54fde4ff | 2487 | if (base && bottom) { |
7f4a396d VSO |
2488 | error_setg(errp, "'base' and 'bottom' cannot be specified " |
2489 | "at the same time"); | |
2490 | return; | |
2491 | } | |
2492 | ||
54fde4ff | 2493 | if (bottom && base_node) { |
7f4a396d VSO |
2494 | error_setg(errp, "'bottom' and 'base-node' cannot be specified " |
2495 | "at the same time"); | |
2496 | return; | |
2497 | } | |
2498 | ||
1d809098 PB |
2499 | if (!has_on_error) { |
2500 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2501 | } | |
2502 | ||
554b6147 | 2503 | bs = bdrv_lookup_bs(device, device, errp); |
b6c1bae5 | 2504 | if (!bs) { |
12bd451f SH |
2505 | return; |
2506 | } | |
2507 | ||
b6c1bae5 | 2508 | aio_context = bdrv_get_aio_context(bs); |
f3e69beb SH |
2509 | aio_context_acquire(aio_context); |
2510 | ||
54fde4ff | 2511 | if (base) { |
c8c3080f MT |
2512 | base_bs = bdrv_find_backing_image(bs, base); |
2513 | if (base_bs == NULL) { | |
b0d7be2a | 2514 | error_setg(errp, "Can't find '%s' in the backing chain", base); |
f3e69beb | 2515 | goto out; |
c8c3080f | 2516 | } |
f3e69beb | 2517 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
12bd451f SH |
2518 | } |
2519 | ||
54fde4ff | 2520 | if (base_node) { |
312fe09c AG |
2521 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); |
2522 | if (!base_bs) { | |
2523 | goto out; | |
2524 | } | |
2525 | if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) { | |
2526 | error_setg(errp, "Node '%s' is not a backing image of '%s'", | |
2527 | base_node, device); | |
2528 | goto out; | |
2529 | } | |
2530 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
f30c66ba | 2531 | bdrv_refresh_filename(base_bs); |
312fe09c AG |
2532 | } |
2533 | ||
54fde4ff | 2534 | if (bottom) { |
7f4a396d VSO |
2535 | bottom_bs = bdrv_lookup_bs(NULL, bottom, errp); |
2536 | if (!bottom_bs) { | |
2537 | goto out; | |
2538 | } | |
2539 | if (!bottom_bs->drv) { | |
2540 | error_setg(errp, "Node '%s' is not open", bottom); | |
2541 | goto out; | |
2542 | } | |
2543 | if (bottom_bs->drv->is_filter) { | |
2544 | error_setg(errp, "Node '%s' is a filter, use a non-filter node " | |
2545 | "as 'bottom'", bottom); | |
2546 | goto out; | |
2547 | } | |
2548 | if (!bdrv_chain_contains(bs, bottom_bs)) { | |
2549 | error_setg(errp, "Node '%s' is not in a chain starting from '%s'", | |
2550 | bottom, device); | |
2551 | goto out; | |
2552 | } | |
2553 | assert(bdrv_get_aio_context(bottom_bs) == aio_context); | |
2554 | } | |
2555 | ||
2556 | /* | |
2557 | * Check for op blockers in the whole chain between bs and base (or bottom) | |
2558 | */ | |
54fde4ff | 2559 | iter_end = bottom ? bdrv_filter_or_cow_bs(bottom_bs) : base_bs; |
7f4a396d | 2560 | for (iter = bs; iter && iter != iter_end; |
67acfd21 HR |
2561 | iter = bdrv_filter_or_cow_bs(iter)) |
2562 | { | |
554b6147 AG |
2563 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) { |
2564 | goto out; | |
2565 | } | |
2566 | } | |
2567 | ||
13d8cc51 JC |
2568 | /* if we are streaming the entire chain, the result will have no backing |
2569 | * file, and specifying one is therefore an error */ | |
54fde4ff | 2570 | if (!base_bs && backing_file) { |
13d8cc51 JC |
2571 | error_setg(errp, "backing file specified, but streaming the " |
2572 | "entire chain"); | |
f3e69beb | 2573 | goto out; |
13d8cc51 JC |
2574 | } |
2575 | ||
241ca1ab JS |
2576 | if (has_auto_finalize && !auto_finalize) { |
2577 | job_flags |= JOB_MANUAL_FINALIZE; | |
2578 | } | |
2579 | if (has_auto_dismiss && !auto_dismiss) { | |
2580 | job_flags |= JOB_MANUAL_DISMISS; | |
2581 | } | |
2582 | ||
54fde4ff | 2583 | stream_start(job_id, bs, base_bs, backing_file, |
7f4a396d | 2584 | bottom_bs, job_flags, has_speed ? speed : 0, on_error, |
880747a8 | 2585 | filter_node_name, &local_err); |
84d18f06 | 2586 | if (local_err) { |
fd7f8c65 | 2587 | error_propagate(errp, local_err); |
f3e69beb | 2588 | goto out; |
12bd451f SH |
2589 | } |
2590 | ||
b23c580c | 2591 | trace_qmp_block_stream(bs); |
f3e69beb SH |
2592 | |
2593 | out: | |
2594 | aio_context_release(aio_context); | |
12bd451f | 2595 | } |
2d47c6e9 | 2596 | |
54fde4ff MA |
2597 | void qmp_block_commit(const char *job_id, const char *device, |
2598 | const char *base_node, | |
2599 | const char *base, | |
2600 | const char *top_node, | |
2601 | const char *top, | |
2602 | const char *backing_file, | |
ed61fc10 | 2603 | bool has_speed, int64_t speed, |
8faad1c7 | 2604 | bool has_on_error, BlockdevOnError on_error, |
54fde4ff | 2605 | const char *filter_node_name, |
96fbf534 JS |
2606 | bool has_auto_finalize, bool auto_finalize, |
2607 | bool has_auto_dismiss, bool auto_dismiss, | |
ed61fc10 JC |
2608 | Error **errp) |
2609 | { | |
2610 | BlockDriverState *bs; | |
058223a6 | 2611 | BlockDriverState *iter; |
ed61fc10 | 2612 | BlockDriverState *base_bs, *top_bs; |
9e85cd5c | 2613 | AioContext *aio_context; |
ed61fc10 | 2614 | Error *local_err = NULL; |
5360782d | 2615 | int job_flags = JOB_DEFAULT; |
05ea385a | 2616 | uint64_t top_perm, top_shared; |
ed61fc10 | 2617 | |
54504663 HR |
2618 | if (!has_speed) { |
2619 | speed = 0; | |
2620 | } | |
8faad1c7 KW |
2621 | if (!has_on_error) { |
2622 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2623 | } | |
96fbf534 JS |
2624 | if (has_auto_finalize && !auto_finalize) { |
2625 | job_flags |= JOB_MANUAL_FINALIZE; | |
2626 | } | |
2627 | if (has_auto_dismiss && !auto_dismiss) { | |
2628 | job_flags |= JOB_MANUAL_DISMISS; | |
2629 | } | |
54504663 | 2630 | |
7676e2c5 JC |
2631 | /* Important Note: |
2632 | * libvirt relies on the DeviceNotFound error class in order to probe for | |
2633 | * live commit feature versions; for this to work, we must make sure to | |
2634 | * perform the device lookup before any generic errors that may occur in a | |
2635 | * scenario in which all optional arguments are omitted. */ | |
1d13b167 KW |
2636 | bs = qmp_get_root_bs(device, &local_err); |
2637 | if (!bs) { | |
2638 | bs = bdrv_lookup_bs(device, device, NULL); | |
2639 | if (!bs) { | |
2640 | error_free(local_err); | |
2641 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2642 | "Device '%s' not found", device); | |
2643 | } else { | |
2644 | error_propagate(errp, local_err); | |
2645 | } | |
ed61fc10 | 2646 | return; |
628ff683 FZ |
2647 | } |
2648 | ||
1d13b167 | 2649 | aio_context = bdrv_get_aio_context(bs); |
9e85cd5c SH |
2650 | aio_context_acquire(aio_context); |
2651 | ||
bb00021d | 2652 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) { |
9e85cd5c | 2653 | goto out; |
ed61fc10 | 2654 | } |
ed61fc10 JC |
2655 | |
2656 | /* default top_bs is the active layer */ | |
2657 | top_bs = bs; | |
2658 | ||
54fde4ff | 2659 | if (top_node && top) { |
3c605f40 KW |
2660 | error_setg(errp, "'top-node' and 'top' are mutually exclusive"); |
2661 | goto out; | |
54fde4ff | 2662 | } else if (top_node) { |
3c605f40 KW |
2663 | top_bs = bdrv_lookup_bs(NULL, top_node, errp); |
2664 | if (top_bs == NULL) { | |
2665 | goto out; | |
2666 | } | |
2667 | if (!bdrv_chain_contains(bs, top_bs)) { | |
2668 | error_setg(errp, "'%s' is not in this backing file chain", | |
2669 | top_node); | |
2670 | goto out; | |
2671 | } | |
54fde4ff | 2672 | } else if (top) { |
f30c66ba HR |
2673 | /* This strcmp() is just a shortcut, there is no need to |
2674 | * refresh @bs's filename. If it mismatches, | |
2675 | * bdrv_find_backing_image() will do the refresh and may still | |
2676 | * return @bs. */ | |
ed61fc10 JC |
2677 | if (strcmp(bs->filename, top) != 0) { |
2678 | top_bs = bdrv_find_backing_image(bs, top); | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | if (top_bs == NULL) { | |
2683 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
9e85cd5c | 2684 | goto out; |
ed61fc10 JC |
2685 | } |
2686 | ||
9e85cd5c SH |
2687 | assert(bdrv_get_aio_context(top_bs) == aio_context); |
2688 | ||
54fde4ff | 2689 | if (base_node && base) { |
3c605f40 KW |
2690 | error_setg(errp, "'base-node' and 'base' are mutually exclusive"); |
2691 | goto out; | |
54fde4ff | 2692 | } else if (base_node) { |
3c605f40 KW |
2693 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); |
2694 | if (base_bs == NULL) { | |
2695 | goto out; | |
2696 | } | |
2697 | if (!bdrv_chain_contains(top_bs, base_bs)) { | |
2698 | error_setg(errp, "'%s' is not in this backing file chain", | |
2699 | base_node); | |
2700 | goto out; | |
2701 | } | |
54fde4ff | 2702 | } else if (base) { |
d5208c45 | 2703 | base_bs = bdrv_find_backing_image(top_bs, base); |
b0d7be2a MA |
2704 | if (base_bs == NULL) { |
2705 | error_setg(errp, "Can't find '%s' in the backing chain", base); | |
2706 | goto out; | |
2707 | } | |
d5208c45 JC |
2708 | } else { |
2709 | base_bs = bdrv_find_base(top_bs); | |
b0d7be2a MA |
2710 | if (base_bs == NULL) { |
2711 | error_setg(errp, "There is no backimg image"); | |
2712 | goto out; | |
2713 | } | |
d5208c45 JC |
2714 | } |
2715 | ||
9e85cd5c SH |
2716 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
2717 | ||
9a71b9de HR |
2718 | for (iter = top_bs; iter != bdrv_filter_or_cow_bs(base_bs); |
2719 | iter = bdrv_filter_or_cow_bs(iter)) | |
2720 | { | |
058223a6 AG |
2721 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { |
2722 | goto out; | |
2723 | } | |
bb00021d FZ |
2724 | } |
2725 | ||
7676e2c5 JC |
2726 | /* Do not allow attempts to commit an image into itself */ |
2727 | if (top_bs == base_bs) { | |
2728 | error_setg(errp, "cannot commit an image into itself"); | |
9e85cd5c | 2729 | goto out; |
7676e2c5 JC |
2730 | } |
2731 | ||
05ea385a HR |
2732 | /* |
2733 | * Active commit is required if and only if someone has taken a | |
2734 | * WRITE permission on the top node. Historically, we have always | |
2735 | * used active commit for top nodes, so continue that practice | |
2736 | * lest we possibly break clients that rely on this behavior, e.g. | |
2737 | * to later attach this node to a writing parent. | |
2738 | * (Active commit is never really wrong.) | |
2739 | */ | |
2740 | bdrv_get_cumulative_perm(top_bs, &top_perm, &top_shared); | |
2741 | if (top_perm & BLK_PERM_WRITE || | |
2742 | bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) | |
2743 | { | |
54fde4ff | 2744 | if (backing_file) { |
05ea385a HR |
2745 | if (bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) { |
2746 | error_setg(errp, "'backing-file' specified," | |
2747 | " but 'top' is the active layer"); | |
2748 | } else { | |
2749 | error_setg(errp, "'backing-file' specified, but 'top' has a " | |
2750 | "writer on it"); | |
2751 | } | |
9e85cd5c | 2752 | goto out; |
54e26900 | 2753 | } |
54fde4ff | 2754 | if (!job_id) { |
05ea385a HR |
2755 | /* |
2756 | * Emulate here what block_job_create() does, because it | |
2757 | * is possible that @bs != @top_bs (the block job should | |
2758 | * be named after @bs, even if @top_bs is the actual | |
2759 | * source) | |
2760 | */ | |
2761 | job_id = bdrv_get_device_name(bs); | |
2762 | } | |
2763 | commit_active_start(job_id, top_bs, base_bs, job_flags, speed, on_error, | |
78bbd910 | 2764 | filter_node_name, NULL, NULL, false, &local_err); |
20a63d2c | 2765 | } else { |
058223a6 AG |
2766 | BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs); |
2767 | if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { | |
2768 | goto out; | |
2769 | } | |
54fde4ff MA |
2770 | commit_start(job_id, bs, base_bs, top_bs, job_flags, |
2771 | speed, on_error, backing_file, | |
0db832f4 | 2772 | filter_node_name, &local_err); |
20a63d2c | 2773 | } |
ed61fc10 JC |
2774 | if (local_err != NULL) { |
2775 | error_propagate(errp, local_err); | |
9e85cd5c | 2776 | goto out; |
ed61fc10 | 2777 | } |
9e85cd5c SH |
2778 | |
2779 | out: | |
2780 | aio_context_release(aio_context); | |
ed61fc10 JC |
2781 | } |
2782 | ||
7b0b870b JS |
2783 | /* Common QMP interface for drive-backup and blockdev-backup */ |
2784 | static BlockJob *do_backup_common(BackupCommon *backup, | |
2785 | BlockDriverState *bs, | |
2786 | BlockDriverState *target_bs, | |
2787 | AioContext *aio_context, | |
2788 | JobTxn *txn, Error **errp) | |
99a9addf | 2789 | { |
111049a4 | 2790 | BlockJob *job = NULL; |
d58d8453 | 2791 | BdrvDirtyBitmap *bmap = NULL; |
6a30f663 | 2792 | BackupPerf perf = { .max_workers = 64 }; |
7b0b870b | 2793 | int job_flags = JOB_DEFAULT; |
99a9addf | 2794 | |
81206a89 PB |
2795 | if (!backup->has_speed) { |
2796 | backup->speed = 0; | |
99a9addf | 2797 | } |
81206a89 PB |
2798 | if (!backup->has_on_source_error) { |
2799 | backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
99a9addf | 2800 | } |
81206a89 PB |
2801 | if (!backup->has_on_target_error) { |
2802 | backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
99a9addf | 2803 | } |
b40dacdc JS |
2804 | if (!backup->has_auto_finalize) { |
2805 | backup->auto_finalize = true; | |
2806 | } | |
2807 | if (!backup->has_auto_dismiss) { | |
2808 | backup->auto_dismiss = true; | |
2809 | } | |
13b9414b PB |
2810 | if (!backup->has_compress) { |
2811 | backup->compress = false; | |
2812 | } | |
99a9addf | 2813 | |
86c6a3b6 VSO |
2814 | if (backup->x_perf) { |
2815 | if (backup->x_perf->has_use_copy_range) { | |
2816 | perf.use_copy_range = backup->x_perf->use_copy_range; | |
2817 | } | |
2c59fd83 VSO |
2818 | if (backup->x_perf->has_max_workers) { |
2819 | perf.max_workers = backup->x_perf->max_workers; | |
2820 | } | |
2821 | if (backup->x_perf->has_max_chunk) { | |
2822 | perf.max_chunk = backup->x_perf->max_chunk; | |
2823 | } | |
86c6a3b6 VSO |
2824 | } |
2825 | ||
a6c9365a JS |
2826 | if ((backup->sync == MIRROR_SYNC_MODE_BITMAP) || |
2827 | (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL)) { | |
2828 | /* done before desugaring 'incremental' to print the right message */ | |
54fde4ff | 2829 | if (!backup->bitmap) { |
a6c9365a JS |
2830 | error_setg(errp, "must provide a valid bitmap name for " |
2831 | "'%s' sync mode", MirrorSyncMode_str(backup->sync)); | |
2832 | return NULL; | |
2833 | } | |
2834 | } | |
2835 | ||
c8b56501 JS |
2836 | if (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL) { |
2837 | if (backup->has_bitmap_mode && | |
2838 | backup->bitmap_mode != BITMAP_SYNC_MODE_ON_SUCCESS) { | |
2839 | error_setg(errp, "Bitmap sync mode must be '%s' " | |
2840 | "when using sync mode '%s'", | |
2841 | BitmapSyncMode_str(BITMAP_SYNC_MODE_ON_SUCCESS), | |
2842 | MirrorSyncMode_str(backup->sync)); | |
2843 | return NULL; | |
2844 | } | |
2845 | backup->has_bitmap_mode = true; | |
2846 | backup->sync = MIRROR_SYNC_MODE_BITMAP; | |
2847 | backup->bitmap_mode = BITMAP_SYNC_MODE_ON_SUCCESS; | |
2848 | } | |
2849 | ||
54fde4ff | 2850 | if (backup->bitmap) { |
7b0b870b JS |
2851 | bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap); |
2852 | if (!bmap) { | |
2853 | error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap); | |
2854 | return NULL; | |
2855 | } | |
c8b56501 JS |
2856 | if (!backup->has_bitmap_mode) { |
2857 | error_setg(errp, "Bitmap sync mode must be given " | |
2858 | "when providing a bitmap"); | |
2859 | return NULL; | |
2860 | } | |
b30ffbef | 2861 | if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
7b0b870b JS |
2862 | return NULL; |
2863 | } | |
1a2b8b40 JS |
2864 | |
2865 | /* This does not produce a useful bitmap artifact: */ | |
2866 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
2867 | error_setg(errp, "sync mode '%s' does not produce meaningful bitmap" | |
2868 | " outputs", MirrorSyncMode_str(backup->sync)); | |
2869 | return NULL; | |
2870 | } | |
2871 | ||
2872 | /* If the bitmap isn't used for input or output, this is useless: */ | |
2873 | if (backup->bitmap_mode == BITMAP_SYNC_MODE_NEVER && | |
2874 | backup->sync != MIRROR_SYNC_MODE_BITMAP) { | |
2875 | error_setg(errp, "Bitmap sync mode '%s' has no meaningful effect" | |
2876 | " when combined with sync mode '%s'", | |
2877 | BitmapSyncMode_str(backup->bitmap_mode), | |
2878 | MirrorSyncMode_str(backup->sync)); | |
2879 | return NULL; | |
2880 | } | |
2881 | } | |
2882 | ||
54fde4ff | 2883 | if (!backup->bitmap && backup->has_bitmap_mode) { |
1a2b8b40 JS |
2884 | error_setg(errp, "Cannot specify bitmap sync mode without a bitmap"); |
2885 | return NULL; | |
7b0b870b JS |
2886 | } |
2887 | ||
2888 | if (!backup->auto_finalize) { | |
2889 | job_flags |= JOB_MANUAL_FINALIZE; | |
2890 | } | |
2891 | if (!backup->auto_dismiss) { | |
2892 | job_flags |= JOB_MANUAL_DISMISS; | |
2893 | } | |
2894 | ||
2895 | job = backup_job_create(backup->job_id, bs, target_bs, backup->speed, | |
c8b56501 JS |
2896 | backup->sync, bmap, backup->bitmap_mode, |
2897 | backup->compress, | |
00e30f05 | 2898 | backup->filter_node_name, |
86c6a3b6 | 2899 | &perf, |
c8b56501 JS |
2900 | backup->on_source_error, |
2901 | backup->on_target_error, | |
7b0b870b JS |
2902 | job_flags, NULL, NULL, txn, errp); |
2903 | return job; | |
2904 | } | |
2905 | ||
2288ccfa | 2906 | void qmp_drive_backup(DriveBackup *backup, Error **errp) |
78f51fde | 2907 | { |
2288ccfa SL |
2908 | TransactionAction action = { |
2909 | .type = TRANSACTION_ACTION_KIND_DRIVE_BACKUP, | |
2910 | .u.drive_backup.data = backup, | |
2911 | }; | |
2912 | blockdev_do_action(&action, errp); | |
78f51fde JS |
2913 | } |
2914 | ||
facda544 PK |
2915 | BlockDeviceInfoList *qmp_query_named_block_nodes(bool has_flat, |
2916 | bool flat, | |
2917 | Error **errp) | |
c13163fb | 2918 | { |
facda544 PK |
2919 | bool return_flat = has_flat && flat; |
2920 | ||
2921 | return bdrv_named_nodes_list(return_flat, errp); | |
c13163fb BC |
2922 | } |
2923 | ||
5d3b4e99 VSO |
2924 | XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp) |
2925 | { | |
2926 | return bdrv_get_xdbg_block_graph(errp); | |
2927 | } | |
2928 | ||
5b7bfe51 | 2929 | void qmp_blockdev_backup(BlockdevBackup *backup, Error **errp) |
c29c1dd3 | 2930 | { |
5b7bfe51 SL |
2931 | TransactionAction action = { |
2932 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP, | |
2933 | .u.blockdev_backup.data = backup, | |
2934 | }; | |
2935 | blockdev_do_action(&action, errp); | |
78f51fde JS |
2936 | } |
2937 | ||
4193cdd7 FZ |
2938 | /* Parameter check and block job starting for drive mirroring. |
2939 | * Caller should hold @device and @target's aio context (must be the same). | |
2940 | **/ | |
71aa9867 | 2941 | static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs, |
4193cdd7 | 2942 | BlockDriverState *target, |
54fde4ff | 2943 | const char *replaces, |
4193cdd7 | 2944 | enum MirrorSyncMode sync, |
274fccee | 2945 | BlockMirrorBackingMode backing_mode, |
cdf3bc93 | 2946 | bool zero_target, |
4193cdd7 FZ |
2947 | bool has_speed, int64_t speed, |
2948 | bool has_granularity, uint32_t granularity, | |
2949 | bool has_buf_size, int64_t buf_size, | |
2950 | bool has_on_source_error, | |
2951 | BlockdevOnError on_source_error, | |
2952 | bool has_on_target_error, | |
2953 | BlockdevOnError on_target_error, | |
2954 | bool has_unmap, bool unmap, | |
6cdbceb1 | 2955 | const char *filter_node_name, |
481debaa | 2956 | bool has_copy_mode, MirrorCopyMode copy_mode, |
a6b58ade JS |
2957 | bool has_auto_finalize, bool auto_finalize, |
2958 | bool has_auto_dismiss, bool auto_dismiss, | |
4193cdd7 | 2959 | Error **errp) |
d9b902db | 2960 | { |
3f072a7f | 2961 | BlockDriverState *unfiltered_bs; |
a1999b33 | 2962 | int job_flags = JOB_DEFAULT; |
d9b902db | 2963 | |
533c6e4e KW |
2964 | GLOBAL_STATE_CODE(); |
2965 | GRAPH_RDLOCK_GUARD_MAINLOOP(); | |
2966 | ||
d9b902db PB |
2967 | if (!has_speed) { |
2968 | speed = 0; | |
2969 | } | |
b952b558 PB |
2970 | if (!has_on_source_error) { |
2971 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2972 | } | |
2973 | if (!has_on_target_error) { | |
2974 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2975 | } | |
eee13dfe PB |
2976 | if (!has_granularity) { |
2977 | granularity = 0; | |
2978 | } | |
08e4ed6c | 2979 | if (!has_buf_size) { |
48ac0a4d | 2980 | buf_size = 0; |
08e4ed6c | 2981 | } |
0fc9f8ea FZ |
2982 | if (!has_unmap) { |
2983 | unmap = true; | |
2984 | } | |
481debaa HR |
2985 | if (!has_copy_mode) { |
2986 | copy_mode = MIRROR_COPY_MODE_BACKGROUND; | |
2987 | } | |
a6b58ade JS |
2988 | if (has_auto_finalize && !auto_finalize) { |
2989 | job_flags |= JOB_MANUAL_FINALIZE; | |
2990 | } | |
2991 | if (has_auto_dismiss && !auto_dismiss) { | |
2992 | job_flags |= JOB_MANUAL_DISMISS; | |
2993 | } | |
08e4ed6c | 2994 | |
eee13dfe | 2995 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
c6bd8c70 MA |
2996 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", |
2997 | "a value in range [512B, 64MB]"); | |
eee13dfe PB |
2998 | return; |
2999 | } | |
3000 | if (granularity & (granularity - 1)) { | |
c6bd8c70 | 3001 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", |
6cc0667d | 3002 | "a power of 2"); |
eee13dfe PB |
3003 | return; |
3004 | } | |
d9b902db | 3005 | |
4193cdd7 FZ |
3006 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { |
3007 | return; | |
3008 | } | |
e40e5027 FZ |
3009 | if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) { |
3010 | return; | |
3011 | } | |
4193cdd7 | 3012 | |
3f072a7f | 3013 | if (!bdrv_backing_chain_next(bs) && sync == MIRROR_SYNC_MODE_TOP) { |
4193cdd7 FZ |
3014 | sync = MIRROR_SYNC_MODE_FULL; |
3015 | } | |
3016 | ||
54fde4ff | 3017 | if (!replaces) { |
3f072a7f HR |
3018 | /* We want to mirror from @bs, but keep implicit filters on top */ |
3019 | unfiltered_bs = bdrv_skip_implicit_filters(bs); | |
3020 | if (unfiltered_bs != bs) { | |
3021 | replaces = unfiltered_bs->node_name; | |
3f072a7f HR |
3022 | } |
3023 | } | |
3024 | ||
54fde4ff | 3025 | if (replaces) { |
74ce9e46 HR |
3026 | BlockDriverState *to_replace_bs; |
3027 | AioContext *replace_aio_context; | |
3028 | int64_t bs_size, replace_size; | |
3029 | ||
3030 | bs_size = bdrv_getlength(bs); | |
3031 | if (bs_size < 0) { | |
3032 | error_setg_errno(errp, -bs_size, "Failed to query device's size"); | |
3033 | return; | |
3034 | } | |
3035 | ||
3036 | to_replace_bs = check_to_replace_node(bs, replaces, errp); | |
3037 | if (!to_replace_bs) { | |
3038 | return; | |
3039 | } | |
3040 | ||
3041 | replace_aio_context = bdrv_get_aio_context(to_replace_bs); | |
3042 | aio_context_acquire(replace_aio_context); | |
3043 | replace_size = bdrv_getlength(to_replace_bs); | |
3044 | aio_context_release(replace_aio_context); | |
3045 | ||
3046 | if (replace_size < 0) { | |
3047 | error_setg_errno(errp, -replace_size, | |
3048 | "Failed to query the replacement node's size"); | |
3049 | return; | |
3050 | } | |
3051 | if (bs_size != replace_size) { | |
3052 | error_setg(errp, "cannot replace image with a mirror image of " | |
3053 | "different size"); | |
3054 | return; | |
3055 | } | |
3056 | } | |
3057 | ||
4193cdd7 FZ |
3058 | /* pass the node name to replace to mirror start since it's loose coupling |
3059 | * and will allow to check whether the node still exist at mirror completion | |
3060 | */ | |
71aa9867 | 3061 | mirror_start(job_id, bs, target, |
54fde4ff | 3062 | replaces, job_flags, |
cdf3bc93 | 3063 | speed, granularity, buf_size, sync, backing_mode, zero_target, |
6cdbceb1 | 3064 | on_source_error, on_target_error, unmap, filter_node_name, |
481debaa | 3065 | copy_mode, errp); |
4193cdd7 FZ |
3066 | } |
3067 | ||
faecd40a | 3068 | void qmp_drive_mirror(DriveMirror *arg, Error **errp) |
4193cdd7 FZ |
3069 | { |
3070 | BlockDriverState *bs; | |
3f072a7f | 3071 | BlockDriverState *target_backing_bs, *target_bs; |
4193cdd7 | 3072 | AioContext *aio_context; |
3ea67e08 | 3073 | AioContext *old_context; |
274fccee | 3074 | BlockMirrorBackingMode backing_mode; |
4193cdd7 FZ |
3075 | Error *local_err = NULL; |
3076 | QDict *options = NULL; | |
3077 | int flags; | |
3078 | int64_t size; | |
faecd40a | 3079 | const char *format = arg->format; |
cdf3bc93 | 3080 | bool zero_target; |
8ed7d42f | 3081 | int ret; |
4193cdd7 | 3082 | |
0524e93a KW |
3083 | bs = qmp_get_root_bs(arg->device, errp); |
3084 | if (!bs) { | |
d9b902db PB |
3085 | return; |
3086 | } | |
3087 | ||
cb2af917 PB |
3088 | /* Early check to avoid creating target */ |
3089 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { | |
3090 | return; | |
3091 | } | |
3092 | ||
0524e93a | 3093 | aio_context = bdrv_get_aio_context(bs); |
5a7e7a0b SH |
3094 | aio_context_acquire(aio_context); |
3095 | ||
faecd40a EB |
3096 | if (!arg->has_mode) { |
3097 | arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
4193cdd7 | 3098 | } |
d9b902db | 3099 | |
54fde4ff | 3100 | if (!arg->format) { |
faecd40a EB |
3101 | format = (arg->mode == NEW_IMAGE_MODE_EXISTING |
3102 | ? NULL : bs->drv->format_name); | |
d9b902db | 3103 | } |
d9b902db | 3104 | |
61de4c68 | 3105 | flags = bs->open_flags | BDRV_O_RDWR; |
3f072a7f HR |
3106 | target_backing_bs = bdrv_cow_bs(bdrv_skip_filters(bs)); |
3107 | if (!target_backing_bs && arg->sync == MIRROR_SYNC_MODE_TOP) { | |
faecd40a | 3108 | arg->sync = MIRROR_SYNC_MODE_FULL; |
d9b902db | 3109 | } |
faecd40a | 3110 | if (arg->sync == MIRROR_SYNC_MODE_NONE) { |
3f072a7f | 3111 | target_backing_bs = bs; |
117e0c82 | 3112 | } |
d9b902db | 3113 | |
ac3c5d83 SH |
3114 | size = bdrv_getlength(bs); |
3115 | if (size < 0) { | |
3116 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
5a7e7a0b | 3117 | goto out; |
ac3c5d83 SH |
3118 | } |
3119 | ||
54fde4ff MA |
3120 | if (arg->replaces) { |
3121 | if (!arg->node_name) { | |
09158f00 BC |
3122 | error_setg(errp, "a node-name must be provided when replacing a" |
3123 | " named node of the graph"); | |
5a7e7a0b | 3124 | goto out; |
09158f00 | 3125 | } |
09158f00 BC |
3126 | } |
3127 | ||
faecd40a | 3128 | if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) { |
274fccee HR |
3129 | backing_mode = MIRROR_SOURCE_BACKING_CHAIN; |
3130 | } else { | |
3131 | backing_mode = MIRROR_OPEN_BACKING_CHAIN; | |
3132 | } | |
3133 | ||
2a32c6e8 JS |
3134 | /* Don't open backing image in create() */ |
3135 | flags |= BDRV_O_NO_BACKING; | |
3136 | ||
3f072a7f | 3137 | if ((arg->sync == MIRROR_SYNC_MODE_FULL || !target_backing_bs) |
faecd40a | 3138 | && arg->mode != NEW_IMAGE_MODE_EXISTING) |
14526864 | 3139 | { |
d9b902db | 3140 | /* create new image w/o backing file */ |
e6641719 | 3141 | assert(format); |
faecd40a | 3142 | bdrv_img_create(arg->target, format, |
9217283d | 3143 | NULL, NULL, NULL, size, flags, false, &local_err); |
d9b902db | 3144 | } else { |
3f072a7f HR |
3145 | /* Implicit filters should not appear in the filename */ |
3146 | BlockDriverState *explicit_backing = | |
3147 | bdrv_skip_implicit_filters(target_backing_bs); | |
3148 | ||
faecd40a | 3149 | switch (arg->mode) { |
d9b902db | 3150 | case NEW_IMAGE_MODE_EXISTING: |
d9b902db PB |
3151 | break; |
3152 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
3153 | /* create new image with backing file */ | |
3f072a7f | 3154 | bdrv_refresh_filename(explicit_backing); |
faecd40a | 3155 | bdrv_img_create(arg->target, format, |
3f072a7f HR |
3156 | explicit_backing->filename, |
3157 | explicit_backing->drv->format_name, | |
9217283d | 3158 | NULL, size, flags, false, &local_err); |
d9b902db PB |
3159 | break; |
3160 | default: | |
3161 | abort(); | |
3162 | } | |
3163 | } | |
3164 | ||
84d18f06 | 3165 | if (local_err) { |
cf8f2426 | 3166 | error_propagate(errp, local_err); |
5a7e7a0b | 3167 | goto out; |
d9b902db PB |
3168 | } |
3169 | ||
e6641719 | 3170 | options = qdict_new(); |
54fde4ff | 3171 | if (arg->node_name) { |
46f5ac20 | 3172 | qdict_put_str(options, "node-name", arg->node_name); |
4c828dc6 | 3173 | } |
e6641719 | 3174 | if (format) { |
46f5ac20 | 3175 | qdict_put_str(options, "driver", format); |
e6641719 | 3176 | } |
4c828dc6 | 3177 | |
b812f671 PB |
3178 | /* Mirroring takes care of copy-on-write using the source's backing |
3179 | * file. | |
3180 | */ | |
2a32c6e8 | 3181 | target_bs = bdrv_open(arg->target, NULL, options, flags, errp); |
5b363937 | 3182 | if (!target_bs) { |
5a7e7a0b | 3183 | goto out; |
d9b902db PB |
3184 | } |
3185 | ||
cdf3bc93 HR |
3186 | zero_target = (arg->sync == MIRROR_SYNC_MODE_FULL && |
3187 | (arg->mode == NEW_IMAGE_MODE_EXISTING || | |
3188 | !bdrv_has_zero_init(target_bs))); | |
3189 | ||
3ea67e08 | 3190 | |
142e6907 | 3191 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
3ea67e08 SL |
3192 | old_context = bdrv_get_aio_context(target_bs); |
3193 | aio_context_release(aio_context); | |
3194 | aio_context_acquire(old_context); | |
3195 | ||
142e6907 | 3196 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
8ed7d42f KW |
3197 | if (ret < 0) { |
3198 | bdrv_unref(target_bs); | |
3ea67e08 SL |
3199 | aio_context_release(old_context); |
3200 | return; | |
8ed7d42f | 3201 | } |
5a7e7a0b | 3202 | |
3ea67e08 SL |
3203 | aio_context_release(old_context); |
3204 | aio_context_acquire(aio_context); | |
3205 | ||
54fde4ff MA |
3206 | blockdev_mirror_common(arg->job_id, bs, target_bs, |
3207 | arg->replaces, arg->sync, | |
cdf3bc93 HR |
3208 | backing_mode, zero_target, |
3209 | arg->has_speed, arg->speed, | |
faecd40a EB |
3210 | arg->has_granularity, arg->granularity, |
3211 | arg->has_buf_size, arg->buf_size, | |
3212 | arg->has_on_source_error, arg->on_source_error, | |
3213 | arg->has_on_target_error, arg->on_target_error, | |
3214 | arg->has_unmap, arg->unmap, | |
54fde4ff | 3215 | NULL, |
481debaa | 3216 | arg->has_copy_mode, arg->copy_mode, |
a6b58ade JS |
3217 | arg->has_auto_finalize, arg->auto_finalize, |
3218 | arg->has_auto_dismiss, arg->auto_dismiss, | |
992861fb | 3219 | errp); |
e253f4b8 | 3220 | bdrv_unref(target_bs); |
5a7e7a0b SH |
3221 | out: |
3222 | aio_context_release(aio_context); | |
d9b902db PB |
3223 | } |
3224 | ||
54fde4ff | 3225 | void qmp_blockdev_mirror(const char *job_id, |
71aa9867 | 3226 | const char *device, const char *target, |
54fde4ff | 3227 | const char *replaces, |
df92562e FZ |
3228 | MirrorSyncMode sync, |
3229 | bool has_speed, int64_t speed, | |
3230 | bool has_granularity, uint32_t granularity, | |
3231 | bool has_buf_size, int64_t buf_size, | |
3232 | bool has_on_source_error, | |
3233 | BlockdevOnError on_source_error, | |
3234 | bool has_on_target_error, | |
3235 | BlockdevOnError on_target_error, | |
6cdbceb1 | 3236 | const char *filter_node_name, |
481debaa | 3237 | bool has_copy_mode, MirrorCopyMode copy_mode, |
a6b58ade JS |
3238 | bool has_auto_finalize, bool auto_finalize, |
3239 | bool has_auto_dismiss, bool auto_dismiss, | |
df92562e FZ |
3240 | Error **errp) |
3241 | { | |
3242 | BlockDriverState *bs; | |
df92562e FZ |
3243 | BlockDriverState *target_bs; |
3244 | AioContext *aio_context; | |
3ea67e08 | 3245 | AioContext *old_context; |
274fccee | 3246 | BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN; |
cdf3bc93 | 3247 | bool zero_target; |
8ed7d42f | 3248 | int ret; |
df92562e | 3249 | |
07eec652 | 3250 | bs = qmp_get_root_bs(device, errp); |
df92562e | 3251 | if (!bs) { |
df92562e FZ |
3252 | return; |
3253 | } | |
3254 | ||
3255 | target_bs = bdrv_lookup_bs(target, target, errp); | |
3256 | if (!target_bs) { | |
3257 | return; | |
3258 | } | |
3259 | ||
cdf3bc93 HR |
3260 | zero_target = (sync == MIRROR_SYNC_MODE_FULL); |
3261 | ||
142e6907 | 3262 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
3ea67e08 | 3263 | old_context = bdrv_get_aio_context(target_bs); |
df92562e | 3264 | aio_context = bdrv_get_aio_context(bs); |
3ea67e08 | 3265 | aio_context_acquire(old_context); |
df92562e | 3266 | |
142e6907 | 3267 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
3ea67e08 SL |
3268 | |
3269 | aio_context_release(old_context); | |
3270 | aio_context_acquire(aio_context); | |
3271 | ||
8ed7d42f KW |
3272 | if (ret < 0) { |
3273 | goto out; | |
3274 | } | |
df92562e | 3275 | |
54fde4ff MA |
3276 | blockdev_mirror_common(job_id, bs, target_bs, |
3277 | replaces, sync, backing_mode, | |
cdf3bc93 | 3278 | zero_target, has_speed, speed, |
df92562e FZ |
3279 | has_granularity, granularity, |
3280 | has_buf_size, buf_size, | |
3281 | has_on_source_error, on_source_error, | |
3282 | has_on_target_error, on_target_error, | |
54fde4ff | 3283 | true, true, filter_node_name, |
481debaa | 3284 | has_copy_mode, copy_mode, |
a6b58ade JS |
3285 | has_auto_finalize, auto_finalize, |
3286 | has_auto_dismiss, auto_dismiss, | |
992861fb | 3287 | errp); |
8ed7d42f | 3288 | out: |
df92562e FZ |
3289 | aio_context_release(aio_context); |
3290 | } | |
3291 | ||
96241124 | 3292 | /* |
6f592e5a | 3293 | * Get a block job using its ID. Called with job_mutex held. |
96241124 | 3294 | */ |
6f592e5a | 3295 | static BlockJob *find_block_job_locked(const char *id, Error **errp) |
2d47c6e9 | 3296 | { |
3ddf3efe | 3297 | BlockJob *job; |
2d47c6e9 | 3298 | |
3ddf3efe | 3299 | assert(id != NULL); |
5433c24f | 3300 | |
96241124 | 3301 | job = block_job_get_locked(id); |
5433c24f | 3302 | |
3ddf3efe AG |
3303 | if (!job) { |
3304 | error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE, | |
3305 | "Block job '%s' not found", id); | |
3306 | return NULL; | |
2d47c6e9 | 3307 | } |
3d948cdf | 3308 | |
3ddf3efe | 3309 | return job; |
2d47c6e9 SH |
3310 | } |
3311 | ||
882ec7ce | 3312 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
2d47c6e9 | 3313 | { |
96241124 EGE |
3314 | BlockJob *job; |
3315 | ||
3316 | JOB_LOCK_GUARD(); | |
6f592e5a | 3317 | job = find_block_job_locked(device, errp); |
2d47c6e9 SH |
3318 | |
3319 | if (!job) { | |
2d47c6e9 SH |
3320 | return; |
3321 | } | |
3322 | ||
96241124 | 3323 | block_job_set_speed_locked(job, speed, errp); |
2d47c6e9 | 3324 | } |
370521a1 | 3325 | |
6e37fb81 PB |
3326 | void qmp_block_job_cancel(const char *device, |
3327 | bool has_force, bool force, Error **errp) | |
370521a1 | 3328 | { |
96241124 EGE |
3329 | BlockJob *job; |
3330 | ||
3331 | JOB_LOCK_GUARD(); | |
6f592e5a | 3332 | job = find_block_job_locked(device, errp); |
6e37fb81 | 3333 | |
370521a1 | 3334 | if (!job) { |
370521a1 SH |
3335 | return; |
3336 | } | |
3d948cdf SH |
3337 | |
3338 | if (!has_force) { | |
3339 | force = false; | |
3340 | } | |
3341 | ||
96241124 | 3342 | if (job_user_paused_locked(&job->job) && !force) { |
f231b88d CR |
3343 | error_setg(errp, "The block job for device '%s' is currently paused", |
3344 | device); | |
6f592e5a | 3345 | return; |
8acc72a4 | 3346 | } |
370521a1 SH |
3347 | |
3348 | trace_qmp_block_job_cancel(job); | |
96241124 | 3349 | job_user_cancel_locked(&job->job, force, errp); |
370521a1 | 3350 | } |
fb5458cd | 3351 | |
6e37fb81 PB |
3352 | void qmp_block_job_pause(const char *device, Error **errp) |
3353 | { | |
96241124 EGE |
3354 | BlockJob *job; |
3355 | ||
3356 | JOB_LOCK_GUARD(); | |
6f592e5a | 3357 | job = find_block_job_locked(device, errp); |
6e37fb81 | 3358 | |
0ec4dfb8 | 3359 | if (!job) { |
6e37fb81 PB |
3360 | return; |
3361 | } | |
3362 | ||
3363 | trace_qmp_block_job_pause(job); | |
96241124 | 3364 | job_user_pause_locked(&job->job, errp); |
6e37fb81 PB |
3365 | } |
3366 | ||
3367 | void qmp_block_job_resume(const char *device, Error **errp) | |
3368 | { | |
96241124 EGE |
3369 | BlockJob *job; |
3370 | ||
3371 | JOB_LOCK_GUARD(); | |
6f592e5a | 3372 | job = find_block_job_locked(device, errp); |
6e37fb81 | 3373 | |
0ec4dfb8 | 3374 | if (!job) { |
6e37fb81 PB |
3375 | return; |
3376 | } | |
3377 | ||
3378 | trace_qmp_block_job_resume(job); | |
96241124 | 3379 | job_user_resume_locked(&job->job, errp); |
6e37fb81 PB |
3380 | } |
3381 | ||
aeae883b PB |
3382 | void qmp_block_job_complete(const char *device, Error **errp) |
3383 | { | |
96241124 EGE |
3384 | BlockJob *job; |
3385 | ||
3386 | JOB_LOCK_GUARD(); | |
6f592e5a | 3387 | job = find_block_job_locked(device, errp); |
aeae883b PB |
3388 | |
3389 | if (!job) { | |
aeae883b PB |
3390 | return; |
3391 | } | |
3392 | ||
3393 | trace_qmp_block_job_complete(job); | |
96241124 | 3394 | job_complete_locked(&job->job, errp); |
aeae883b PB |
3395 | } |
3396 | ||
11b61fbc JS |
3397 | void qmp_block_job_finalize(const char *id, Error **errp) |
3398 | { | |
96241124 EGE |
3399 | BlockJob *job; |
3400 | ||
3401 | JOB_LOCK_GUARD(); | |
6f592e5a | 3402 | job = find_block_job_locked(id, errp); |
11b61fbc JS |
3403 | |
3404 | if (!job) { | |
3405 | return; | |
3406 | } | |
3407 | ||
3408 | trace_qmp_block_job_finalize(job); | |
96241124 EGE |
3409 | job_ref_locked(&job->job); |
3410 | job_finalize_locked(&job->job, errp); | |
b660a84b | 3411 | |
96241124 | 3412 | job_unref_locked(&job->job); |
11b61fbc JS |
3413 | } |
3414 | ||
75f71059 JS |
3415 | void qmp_block_job_dismiss(const char *id, Error **errp) |
3416 | { | |
96241124 | 3417 | BlockJob *bjob; |
5f9a6a08 | 3418 | Job *job; |
75f71059 | 3419 | |
96241124 | 3420 | JOB_LOCK_GUARD(); |
6f592e5a | 3421 | bjob = find_block_job_locked(id, errp); |
96241124 | 3422 | |
5f9a6a08 | 3423 | if (!bjob) { |
75f71059 JS |
3424 | return; |
3425 | } | |
3426 | ||
5f9a6a08 KW |
3427 | trace_qmp_block_job_dismiss(bjob); |
3428 | job = &bjob->job; | |
96241124 | 3429 | job_dismiss_locked(&job, errp); |
75f71059 JS |
3430 | } |
3431 | ||
fa40e656 JC |
3432 | void qmp_change_backing_file(const char *device, |
3433 | const char *image_node_name, | |
3434 | const char *backing_file, | |
3435 | Error **errp) | |
3436 | { | |
3437 | BlockDriverState *bs = NULL; | |
729962f6 | 3438 | AioContext *aio_context; |
fa40e656 JC |
3439 | BlockDriverState *image_bs = NULL; |
3440 | Error *local_err = NULL; | |
3441 | bool ro; | |
fa40e656 JC |
3442 | int ret; |
3443 | ||
7b5dca3f KW |
3444 | bs = qmp_get_root_bs(device, errp); |
3445 | if (!bs) { | |
fa40e656 JC |
3446 | return; |
3447 | } | |
3448 | ||
7b5dca3f | 3449 | aio_context = bdrv_get_aio_context(bs); |
729962f6 SH |
3450 | aio_context_acquire(aio_context); |
3451 | ||
fa40e656 JC |
3452 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); |
3453 | if (local_err) { | |
3454 | error_propagate(errp, local_err); | |
729962f6 | 3455 | goto out; |
fa40e656 JC |
3456 | } |
3457 | ||
3458 | if (!image_bs) { | |
3459 | error_setg(errp, "image file not found"); | |
729962f6 | 3460 | goto out; |
fa40e656 JC |
3461 | } |
3462 | ||
3463 | if (bdrv_find_base(image_bs) == image_bs) { | |
3464 | error_setg(errp, "not allowing backing file change on an image " | |
3465 | "without a backing file"); | |
729962f6 | 3466 | goto out; |
fa40e656 JC |
3467 | } |
3468 | ||
3469 | /* even though we are not necessarily operating on bs, we need it to | |
3470 | * determine if block ops are currently prohibited on the chain */ | |
3471 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { | |
729962f6 | 3472 | goto out; |
fa40e656 JC |
3473 | } |
3474 | ||
3475 | /* final sanity check */ | |
3476 | if (!bdrv_chain_contains(bs, image_bs)) { | |
3477 | error_setg(errp, "'%s' and image file are not in the same chain", | |
3478 | device); | |
729962f6 | 3479 | goto out; |
fa40e656 JC |
3480 | } |
3481 | ||
3482 | /* if not r/w, reopen to make r/w */ | |
fa40e656 JC |
3483 | ro = bdrv_is_read_only(image_bs); |
3484 | ||
3485 | if (ro) { | |
051a60f6 | 3486 | if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) { |
729962f6 | 3487 | goto out; |
fa40e656 JC |
3488 | } |
3489 | } | |
3490 | ||
3491 | ret = bdrv_change_backing_file(image_bs, backing_file, | |
e54ee1b3 EB |
3492 | image_bs->drv ? image_bs->drv->format_name : "", |
3493 | false); | |
fa40e656 JC |
3494 | |
3495 | if (ret < 0) { | |
3496 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'", | |
3497 | backing_file); | |
3498 | /* don't exit here, so we can try to restore open flags if | |
3499 | * appropriate */ | |
3500 | } | |
3501 | ||
3502 | if (ro) { | |
992861fb | 3503 | bdrv_reopen_set_read_only(image_bs, true, errp); |
fa40e656 | 3504 | } |
729962f6 SH |
3505 | |
3506 | out: | |
3507 | aio_context_release(aio_context); | |
fa40e656 JC |
3508 | } |
3509 | ||
d26c9a15 KW |
3510 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) |
3511 | { | |
be4b67bc | 3512 | BlockDriverState *bs; |
d26c9a15 | 3513 | QObject *obj; |
7d5e199a | 3514 | Visitor *v = qobject_output_visitor_new(&obj); |
d26c9a15 | 3515 | QDict *qdict; |
d26c9a15 | 3516 | |
1f584248 | 3517 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); |
3b098d56 | 3518 | visit_complete(v, &obj); |
7dc847eb | 3519 | qdict = qobject_to(QDict, obj); |
d26c9a15 KW |
3520 | |
3521 | qdict_flatten(qdict); | |
3522 | ||
9ec8873e KW |
3523 | if (!qdict_get_try_str(qdict, "node-name")) { |
3524 | error_setg(errp, "'node-name' must be specified for the root node"); | |
3525 | goto fail; | |
3526 | } | |
9c4218e9 | 3527 | |
9ec8873e KW |
3528 | bs = bds_tree_init(qdict, errp); |
3529 | if (!bs) { | |
3530 | goto fail; | |
d26c9a15 KW |
3531 | } |
3532 | ||
89802d5a | 3533 | bdrv_set_monitor_owned(bs); |
9ec8873e | 3534 | |
d26c9a15 | 3535 | fail: |
3b098d56 | 3536 | visit_free(v); |
d26c9a15 KW |
3537 | } |
3538 | ||
e60edf69 | 3539 | void qmp_blockdev_reopen(BlockdevOptionsList *reopen_list, Error **errp) |
3908b7a8 AG |
3540 | { |
3541 | BlockReopenQueue *queue = NULL; | |
3908b7a8 AG |
3542 | |
3543 | /* Add each one of the BDS that we want to reopen to the queue */ | |
3544 | for (; reopen_list != NULL; reopen_list = reopen_list->next) { | |
3545 | BlockdevOptions *options = reopen_list->value; | |
3546 | BlockDriverState *bs; | |
3547 | AioContext *ctx; | |
3548 | QObject *obj; | |
3549 | Visitor *v; | |
3550 | QDict *qdict; | |
3551 | ||
3552 | /* Check for the selected node name */ | |
54fde4ff | 3553 | if (!options->node_name) { |
3908b7a8 AG |
3554 | error_setg(errp, "node-name not specified"); |
3555 | goto fail; | |
3556 | } | |
1479c730 | 3557 | |
3908b7a8 AG |
3558 | bs = bdrv_find_node(options->node_name); |
3559 | if (!bs) { | |
3560 | error_setg(errp, "Failed to find node with node-name='%s'", | |
3561 | options->node_name); | |
3562 | goto fail; | |
3563 | } | |
1479c730 | 3564 | |
3908b7a8 AG |
3565 | /* Put all options in a QDict and flatten it */ |
3566 | v = qobject_output_visitor_new(&obj); | |
3567 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); | |
3568 | visit_complete(v, &obj); | |
3569 | visit_free(v); | |
1479c730 | 3570 | |
3908b7a8 | 3571 | qdict = qobject_to(QDict, obj); |
1479c730 | 3572 | |
3908b7a8 | 3573 | qdict_flatten(qdict); |
1479c730 | 3574 | |
3908b7a8 AG |
3575 | ctx = bdrv_get_aio_context(bs); |
3576 | aio_context_acquire(ctx); | |
6cf42ca2 | 3577 | |
3908b7a8 | 3578 | queue = bdrv_reopen_queue(queue, bs, qdict, false); |
6cf42ca2 | 3579 | |
3908b7a8 AG |
3580 | aio_context_release(ctx); |
3581 | } | |
3582 | ||
3583 | /* Perform the reopen operation */ | |
3584 | bdrv_reopen_multiple(queue, errp); | |
3585 | queue = NULL; | |
1479c730 AG |
3586 | |
3587 | fail: | |
3908b7a8 | 3588 | bdrv_reopen_queue_free(queue); |
1479c730 AG |
3589 | } |
3590 | ||
79b7a77e | 3591 | void qmp_blockdev_del(const char *node_name, Error **errp) |
81b936ae AG |
3592 | { |
3593 | AioContext *aio_context; | |
81b936ae AG |
3594 | BlockDriverState *bs; |
3595 | ||
b4ad82aa EGE |
3596 | GLOBAL_STATE_CODE(); |
3597 | ||
9ec8873e KW |
3598 | bs = bdrv_find_node(node_name); |
3599 | if (!bs) { | |
ef2e38a1 | 3600 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); |
81b936ae AG |
3601 | return; |
3602 | } | |
9ec8873e KW |
3603 | if (bdrv_has_blk(bs)) { |
3604 | error_setg(errp, "Node %s is in use", node_name); | |
3605 | return; | |
81b936ae | 3606 | } |
9ec8873e | 3607 | aio_context = bdrv_get_aio_context(bs); |
81b936ae AG |
3608 | aio_context_acquire(aio_context); |
3609 | ||
9ec8873e KW |
3610 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) { |
3611 | goto out; | |
3612 | } | |
9c4218e9 | 3613 | |
70537ed5 | 3614 | if (!QTAILQ_IN_USE(bs, monitor_list)) { |
9ec8873e KW |
3615 | error_setg(errp, "Node %s is not owned by the monitor", |
3616 | bs->node_name); | |
3617 | goto out; | |
81b936ae AG |
3618 | } |
3619 | ||
9ec8873e KW |
3620 | if (bs->refcnt > 1) { |
3621 | error_setg(errp, "Block device %s is in use", | |
3622 | bdrv_get_device_or_node_name(bs)); | |
3623 | goto out; | |
81b936ae AG |
3624 | } |
3625 | ||
9ec8873e KW |
3626 | QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); |
3627 | bdrv_unref(bs); | |
3628 | ||
81b936ae AG |
3629 | out: |
3630 | aio_context_release(aio_context); | |
3631 | } | |
3632 | ||
7f821597 WC |
3633 | static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs, |
3634 | const char *child_name) | |
3635 | { | |
3636 | BdrvChild *child; | |
3637 | ||
3638 | QLIST_FOREACH(child, &parent_bs->children, next) { | |
3639 | if (strcmp(child->name, child_name) == 0) { | |
3640 | return child; | |
3641 | } | |
3642 | } | |
3643 | ||
3644 | return NULL; | |
3645 | } | |
3646 | ||
54fde4ff | 3647 | void qmp_x_blockdev_change(const char *parent, const char *child, |
7f821597 WC |
3648 | const char *node, Error **errp) |
3649 | { | |
3650 | BlockDriverState *parent_bs, *new_bs = NULL; | |
3651 | BdrvChild *p_child; | |
3652 | ||
3653 | parent_bs = bdrv_lookup_bs(parent, parent, errp); | |
3654 | if (!parent_bs) { | |
3655 | return; | |
3656 | } | |
3657 | ||
54fde4ff MA |
3658 | if (!child == !node) { |
3659 | if (child) { | |
7f821597 WC |
3660 | error_setg(errp, "The parameters child and node are in conflict"); |
3661 | } else { | |
3662 | error_setg(errp, "Either child or node must be specified"); | |
3663 | } | |
3664 | return; | |
3665 | } | |
3666 | ||
54fde4ff | 3667 | if (child) { |
7f821597 WC |
3668 | p_child = bdrv_find_child(parent_bs, child); |
3669 | if (!p_child) { | |
3670 | error_setg(errp, "Node '%s' does not have child '%s'", | |
3671 | parent, child); | |
3672 | return; | |
3673 | } | |
3674 | bdrv_del_child(parent_bs, p_child, errp); | |
3675 | } | |
3676 | ||
54fde4ff | 3677 | if (node) { |
7f821597 WC |
3678 | new_bs = bdrv_find_node(node); |
3679 | if (!new_bs) { | |
3680 | error_setg(errp, "Node '%s' not found", node); | |
3681 | return; | |
3682 | } | |
3683 | bdrv_add_child(parent_bs, new_bs, errp); | |
3684 | } | |
3685 | } | |
3686 | ||
fea68bb6 | 3687 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
fb5458cd | 3688 | { |
c3033fd3 | 3689 | BlockJobInfoList *head = NULL, **tail = &head; |
f0f55ded | 3690 | BlockJob *job; |
fb5458cd | 3691 | |
880eeec6 EGE |
3692 | JOB_LOCK_GUARD(); |
3693 | ||
3694 | for (job = block_job_next_locked(NULL); job; | |
3695 | job = block_job_next_locked(job)) { | |
c3033fd3 | 3696 | BlockJobInfo *value; |
69691e72 | 3697 | |
559b935f JS |
3698 | if (block_job_is_internal(job)) { |
3699 | continue; | |
3700 | } | |
880eeec6 | 3701 | value = block_job_query_locked(job, errp); |
c3033fd3 | 3702 | if (!value) { |
559b935f JS |
3703 | qapi_free_BlockJobInfoList(head); |
3704 | return NULL; | |
3705 | } | |
c3033fd3 | 3706 | QAPI_LIST_APPEND(tail, value); |
fb5458cd | 3707 | } |
fb5458cd | 3708 | |
fea68bb6 | 3709 | return head; |
fb5458cd | 3710 | } |
4d454574 | 3711 | |
ca00bbb1 | 3712 | void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread, |
882e9b89 | 3713 | bool has_force, bool force, Error **errp) |
ca00bbb1 SH |
3714 | { |
3715 | AioContext *old_context; | |
3716 | AioContext *new_context; | |
3717 | BlockDriverState *bs; | |
3718 | ||
3719 | bs = bdrv_find_node(node_name); | |
3720 | if (!bs) { | |
ef2e38a1 | 3721 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); |
ca00bbb1 SH |
3722 | return; |
3723 | } | |
3724 | ||
882e9b89 SH |
3725 | /* Protects against accidents. */ |
3726 | if (!(has_force && force) && bdrv_has_blk(bs)) { | |
3727 | error_setg(errp, "Node %s is associated with a BlockBackend and could " | |
3728 | "be in use (use force=true to override this check)", | |
3729 | node_name); | |
ca00bbb1 SH |
3730 | return; |
3731 | } | |
3732 | ||
3733 | if (iothread->type == QTYPE_QSTRING) { | |
3734 | IOThread *obj = iothread_by_id(iothread->u.s); | |
3735 | if (!obj) { | |
3736 | error_setg(errp, "Cannot find iothread %s", iothread->u.s); | |
3737 | return; | |
3738 | } | |
3739 | ||
3740 | new_context = iothread_get_aio_context(obj); | |
3741 | } else { | |
3742 | new_context = qemu_get_aio_context(); | |
3743 | } | |
3744 | ||
3745 | old_context = bdrv_get_aio_context(bs); | |
3746 | aio_context_acquire(old_context); | |
3747 | ||
142e6907 | 3748 | bdrv_try_change_aio_context(bs, new_context, NULL, errp); |
ca00bbb1 SH |
3749 | |
3750 | aio_context_release(old_context); | |
3751 | } | |
3752 | ||
0006383e | 3753 | QemuOptsList qemu_common_drive_opts = { |
4d454574 | 3754 | .name = "drive", |
0006383e | 3755 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
4d454574 PB |
3756 | .desc = { |
3757 | { | |
4d454574 PB |
3758 | .name = "snapshot", |
3759 | .type = QEMU_OPT_BOOL, | |
3760 | .help = "enable/disable snapshot mode", | |
4d454574 PB |
3761 | },{ |
3762 | .name = "aio", | |
3763 | .type = QEMU_OPT_STRING, | |
f80f2673 | 3764 | .help = "host AIO implementation (threads, native, io_uring)", |
e4b24b49 KW |
3765 | },{ |
3766 | .name = BDRV_OPT_CACHE_WB, | |
3767 | .type = QEMU_OPT_BOOL, | |
3768 | .help = "Enable writeback mode", | |
4d454574 PB |
3769 | },{ |
3770 | .name = "format", | |
3771 | .type = QEMU_OPT_STRING, | |
3772 | .help = "disk format (raw, qcow2, ...)", | |
4d454574 PB |
3773 | },{ |
3774 | .name = "rerror", | |
3775 | .type = QEMU_OPT_STRING, | |
3776 | .help = "read error action", | |
3777 | },{ | |
3778 | .name = "werror", | |
3779 | .type = QEMU_OPT_STRING, | |
3780 | .help = "write error action", | |
4d454574 | 3781 | },{ |
4e200cf8 | 3782 | .name = BDRV_OPT_READ_ONLY, |
4d454574 PB |
3783 | .type = QEMU_OPT_BOOL, |
3784 | .help = "open drive file as read-only", | |
a2a7862c PJ |
3785 | }, |
3786 | ||
3787 | THROTTLE_OPTS, | |
3788 | ||
3789 | { | |
76f4afb4 AG |
3790 | .name = "throttling.group", |
3791 | .type = QEMU_OPT_STRING, | |
3792 | .help = "name of the block throttling group", | |
4d454574 PB |
3793 | },{ |
3794 | .name = "copy-on-read", | |
3795 | .type = QEMU_OPT_BOOL, | |
3796 | .help = "copy read data from backing file into image file", | |
465bee1d PL |
3797 | },{ |
3798 | .name = "detect-zeroes", | |
3799 | .type = QEMU_OPT_STRING, | |
3800 | .help = "try to optimize zero writes (off, on, unmap)", | |
362e9299 AG |
3801 | },{ |
3802 | .name = "stats-account-invalid", | |
3803 | .type = QEMU_OPT_BOOL, | |
3804 | .help = "whether to account for invalid I/O operations " | |
3805 | "in the statistics", | |
3806 | },{ | |
3807 | .name = "stats-account-failed", | |
3808 | .type = QEMU_OPT_BOOL, | |
3809 | .help = "whether to account for failed I/O operations " | |
3810 | "in the statistics", | |
4d454574 PB |
3811 | }, |
3812 | { /* end of list */ } | |
3813 | }, | |
3814 | }; | |
0006383e KW |
3815 | |
3816 | QemuOptsList qemu_drive_opts = { | |
3817 | .name = "drive", | |
3818 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
3819 | .desc = { | |
492fdc6f KW |
3820 | /* |
3821 | * no elements => accept any params | |
3822 | * validation will happen later | |
3823 | */ | |
0006383e KW |
3824 | { /* end of list */ } |
3825 | }, | |
3826 | }; |