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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 | ||
156 | for (job = block_job_next_locked(NULL); job; | |
157 | job = block_job_next_locked(job)) { | |
8164102f | 158 | if (block_job_has_bdrv(job, blk_bs(blk))) { |
880eeec6 | 159 | job_cancel_locked(&job->job, false); |
8164102f | 160 | } |
5433c24f | 161 | } |
91fddb0d | 162 | |
26f8b3a8 | 163 | dinfo->auto_del = 1; |
14bafc54 MA |
164 | } |
165 | ||
4be74634 | 166 | void blockdev_auto_del(BlockBackend *blk) |
14bafc54 | 167 | { |
18e46a03 | 168 | DriveInfo *dinfo = blk_legacy_dinfo(blk); |
c5be7445 | 169 | GLOBAL_STATE_CODE(); |
14bafc54 | 170 | |
0fc0f1fa | 171 | if (dinfo && dinfo->auto_del) { |
efaa7c4e | 172 | monitor_remove_blk(blk); |
b9fe8a7a | 173 | blk_unref(blk); |
14bafc54 MA |
174 | } |
175 | } | |
176 | ||
505a7fb1 MA |
177 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
178 | { | |
179 | int max_devs = if_max_devs[type]; | |
180 | return max_devs ? index / max_devs : 0; | |
181 | } | |
182 | ||
183 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
184 | { | |
185 | int max_devs = if_max_devs[type]; | |
186 | return max_devs ? index % max_devs : index; | |
187 | } | |
188 | ||
2292ddae | 189 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
5645b0f4 | 190 | const char *optstr) |
666daa68 | 191 | { |
666daa68 MA |
192 | QemuOpts *opts; |
193 | ||
c5be7445 EGE |
194 | GLOBAL_STATE_CODE(); |
195 | ||
cc67f28e | 196 | opts = qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false); |
666daa68 MA |
197 | if (!opts) { |
198 | return NULL; | |
199 | } | |
2292ddae | 200 | if (type != IF_DEFAULT) { |
f43e47db | 201 | qemu_opt_set(opts, "if", if_name[type], &error_abort); |
2292ddae MA |
202 | } |
203 | if (index >= 0) { | |
a8b18f8f | 204 | qemu_opt_set_number(opts, "index", index, &error_abort); |
2292ddae | 205 | } |
666daa68 | 206 | if (file) |
f43e47db | 207 | qemu_opt_set(opts, "file", file, &error_abort); |
666daa68 MA |
208 | return opts; |
209 | } | |
210 | ||
211 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
212 | { | |
18e46a03 | 213 | BlockBackend *blk; |
666daa68 MA |
214 | DriveInfo *dinfo; |
215 | ||
c5be7445 EGE |
216 | GLOBAL_STATE_CODE(); |
217 | ||
18e46a03 MA |
218 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
219 | dinfo = blk_legacy_dinfo(blk); | |
220 | if (dinfo && dinfo->type == type | |
221 | && dinfo->bus == bus && dinfo->unit == unit) { | |
666daa68 | 222 | return dinfo; |
18e46a03 | 223 | } |
666daa68 MA |
224 | } |
225 | ||
226 | return NULL; | |
227 | } | |
228 | ||
fe9f70a1 MA |
229 | /* |
230 | * Check board claimed all -drive that are meant to be claimed. | |
231 | * Fatal error if any remain unclaimed. | |
232 | */ | |
720b8dc0 | 233 | void drive_check_orphaned(void) |
a66c9dc7 | 234 | { |
18e46a03 | 235 | BlockBackend *blk; |
a66c9dc7 | 236 | DriveInfo *dinfo; |
664cc623 | 237 | Location loc; |
720b8dc0 | 238 | bool orphans = false; |
a66c9dc7 | 239 | |
c5be7445 EGE |
240 | GLOBAL_STATE_CODE(); |
241 | ||
18e46a03 MA |
242 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
243 | dinfo = blk_legacy_dinfo(blk); | |
fe9f70a1 MA |
244 | /* |
245 | * Ignore default drives, because we create certain default | |
246 | * drives unconditionally, then leave them unclaimed. Not the | |
247 | * users fault. | |
248 | * Ignore IF_VIRTIO, because it gets desugared into -device, | |
249 | * so we can leave failing to -device. | |
250 | * Ignore IF_NONE, because leaving unclaimed IF_NONE remains | |
251 | * available for device_add is a feature. | |
252 | */ | |
253 | if (dinfo->is_default || dinfo->type == IF_VIRTIO | |
254 | || dinfo->type == IF_NONE) { | |
a1b40bda MA |
255 | continue; |
256 | } | |
257 | if (!blk_get_attached_dev(blk)) { | |
664cc623 MA |
258 | loc_push_none(&loc); |
259 | qemu_opts_loc_restore(dinfo->opts); | |
720b8dc0 | 260 | error_report("machine type does not support" |
664cc623 MA |
261 | " if=%s,bus=%d,unit=%d", |
262 | if_name[dinfo->type], dinfo->bus, dinfo->unit); | |
263 | loc_pop(&loc); | |
720b8dc0 | 264 | orphans = true; |
a66c9dc7 JS |
265 | } |
266 | } | |
267 | ||
720b8dc0 MA |
268 | if (orphans) { |
269 | exit(1); | |
270 | } | |
a66c9dc7 JS |
271 | } |
272 | ||
f1bd51ac MA |
273 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
274 | { | |
c5be7445 | 275 | GLOBAL_STATE_CODE(); |
f1bd51ac MA |
276 | return drive_get(type, |
277 | drive_index_to_bus_id(type, index), | |
278 | drive_index_to_unit_id(type, index)); | |
279 | } | |
280 | ||
666daa68 MA |
281 | int drive_get_max_bus(BlockInterfaceType type) |
282 | { | |
283 | int max_bus; | |
18e46a03 | 284 | BlockBackend *blk; |
666daa68 MA |
285 | DriveInfo *dinfo; |
286 | ||
c5be7445 EGE |
287 | GLOBAL_STATE_CODE(); |
288 | ||
666daa68 | 289 | max_bus = -1; |
18e46a03 MA |
290 | for (blk = blk_next(NULL); blk; blk = blk_next(blk)) { |
291 | dinfo = blk_legacy_dinfo(blk); | |
292 | if (dinfo && dinfo->type == type && dinfo->bus > max_bus) { | |
666daa68 | 293 | max_bus = dinfo->bus; |
18e46a03 | 294 | } |
666daa68 MA |
295 | } |
296 | return max_bus; | |
297 | } | |
298 | ||
666daa68 MA |
299 | static void bdrv_format_print(void *opaque, const char *name) |
300 | { | |
cdcd4361 | 301 | qemu_printf(" %s", name); |
666daa68 MA |
302 | } |
303 | ||
aa398a5c SH |
304 | typedef struct { |
305 | QEMUBH *bh; | |
fa510ebf FZ |
306 | BlockDriverState *bs; |
307 | } BDRVPutRefBH; | |
aa398a5c | 308 | |
b681072d | 309 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) |
666daa68 MA |
310 | { |
311 | if (!strcmp(buf, "ignore")) { | |
92aa5c6d | 312 | return BLOCKDEV_ON_ERROR_IGNORE; |
666daa68 | 313 | } else if (!is_read && !strcmp(buf, "enospc")) { |
92aa5c6d | 314 | return BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 315 | } else if (!strcmp(buf, "stop")) { |
92aa5c6d | 316 | return BLOCKDEV_ON_ERROR_STOP; |
666daa68 | 317 | } else if (!strcmp(buf, "report")) { |
92aa5c6d | 318 | return BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 319 | } else { |
b681072d KW |
320 | error_setg(errp, "'%s' invalid %s error action", |
321 | buf, is_read ? "read" : "write"); | |
666daa68 MA |
322 | return -1; |
323 | } | |
324 | } | |
325 | ||
40119eff AG |
326 | static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals, |
327 | Error **errp) | |
328 | { | |
329 | const QListEntry *entry; | |
330 | for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) { | |
331 | switch (qobject_type(entry->value)) { | |
332 | ||
333 | case QTYPE_QSTRING: { | |
334 | unsigned long long length; | |
7dc847eb HR |
335 | const char *str = qstring_get_str(qobject_to(QString, |
336 | entry->value)); | |
40119eff AG |
337 | if (parse_uint_full(str, &length, 10) == 0 && |
338 | length > 0 && length <= UINT_MAX) { | |
339 | block_acct_add_interval(stats, (unsigned) length); | |
340 | } else { | |
341 | error_setg(errp, "Invalid interval length: %s", str); | |
342 | return false; | |
343 | } | |
344 | break; | |
345 | } | |
346 | ||
01b2ffce | 347 | case QTYPE_QNUM: { |
7dc847eb | 348 | int64_t length = qnum_get_int(qobject_to(QNum, entry->value)); |
01b2ffce | 349 | |
40119eff AG |
350 | if (length > 0 && length <= UINT_MAX) { |
351 | block_acct_add_interval(stats, (unsigned) length); | |
352 | } else { | |
353 | error_setg(errp, "Invalid interval length: %" PRId64, length); | |
354 | return false; | |
355 | } | |
356 | break; | |
357 | } | |
358 | ||
359 | default: | |
360 | error_setg(errp, "The specification of stats-intervals is invalid"); | |
361 | return false; | |
362 | } | |
363 | } | |
364 | return true; | |
365 | } | |
366 | ||
33cb7dc8 KW |
367 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; |
368 | ||
fbf8175e HR |
369 | /* All parameters but @opts are optional and may be set to NULL. */ |
370 | static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags, | |
371 | const char **throttling_group, ThrottleConfig *throttle_cfg, | |
372 | BlockdevDetectZeroesOptions *detect_zeroes, Error **errp) | |
373 | { | |
fbf8175e HR |
374 | Error *local_error = NULL; |
375 | const char *aio; | |
376 | ||
377 | if (bdrv_flags) { | |
fbf8175e HR |
378 | if (qemu_opt_get_bool(opts, "copy-on-read", false)) { |
379 | *bdrv_flags |= BDRV_O_COPY_ON_READ; | |
380 | } | |
381 | ||
fbf8175e | 382 | if ((aio = qemu_opt_get(opts, "aio")) != NULL) { |
f80f2673 AM |
383 | if (bdrv_parse_aio(aio, bdrv_flags) < 0) { |
384 | error_setg(errp, "invalid aio option"); | |
385 | return; | |
fbf8175e HR |
386 | } |
387 | } | |
388 | } | |
389 | ||
390 | /* disk I/O throttling */ | |
391 | if (throttling_group) { | |
392 | *throttling_group = qemu_opt_get(opts, "throttling.group"); | |
393 | } | |
394 | ||
395 | if (throttle_cfg) { | |
1588ab5d | 396 | throttle_config_init(throttle_cfg); |
fbf8175e HR |
397 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg = |
398 | qemu_opt_get_number(opts, "throttling.bps-total", 0); | |
399 | throttle_cfg->buckets[THROTTLE_BPS_READ].avg = | |
400 | qemu_opt_get_number(opts, "throttling.bps-read", 0); | |
401 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg = | |
402 | qemu_opt_get_number(opts, "throttling.bps-write", 0); | |
403 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg = | |
404 | qemu_opt_get_number(opts, "throttling.iops-total", 0); | |
405 | throttle_cfg->buckets[THROTTLE_OPS_READ].avg = | |
406 | qemu_opt_get_number(opts, "throttling.iops-read", 0); | |
407 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg = | |
408 | qemu_opt_get_number(opts, "throttling.iops-write", 0); | |
409 | ||
410 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max = | |
411 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
412 | throttle_cfg->buckets[THROTTLE_BPS_READ].max = | |
413 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
414 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].max = | |
415 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
416 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max = | |
417 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
418 | throttle_cfg->buckets[THROTTLE_OPS_READ].max = | |
419 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
420 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].max = | |
421 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
422 | ||
8a0fc18d AG |
423 | throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length = |
424 | qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1); | |
425 | throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length = | |
426 | qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1); | |
427 | throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length = | |
428 | qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1); | |
429 | throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length = | |
430 | qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1); | |
431 | throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length = | |
432 | qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1); | |
433 | throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length = | |
434 | qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1); | |
435 | ||
fbf8175e HR |
436 | throttle_cfg->op_size = |
437 | qemu_opt_get_number(opts, "throttling.iops-size", 0); | |
438 | ||
d5851089 | 439 | if (!throttle_is_valid(throttle_cfg, errp)) { |
fbf8175e HR |
440 | return; |
441 | } | |
442 | } | |
443 | ||
444 | if (detect_zeroes) { | |
445 | *detect_zeroes = | |
f7abe0ec | 446 | qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup, |
fbf8175e | 447 | qemu_opt_get(opts, "detect-zeroes"), |
fbf8175e HR |
448 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, |
449 | &local_error); | |
450 | if (local_error) { | |
451 | error_propagate(errp, local_error); | |
452 | return; | |
453 | } | |
fbf8175e HR |
454 | } |
455 | } | |
456 | ||
b2aaf354 DL |
457 | static OnOffAuto account_get_opt(QemuOpts *opts, const char *name) |
458 | { | |
459 | if (!qemu_opt_find(opts, name)) { | |
460 | return ON_OFF_AUTO_AUTO; | |
461 | } | |
462 | if (qemu_opt_get_bool(opts, name, true)) { | |
463 | return ON_OFF_AUTO_ON; | |
464 | } | |
465 | return ON_OFF_AUTO_OFF; | |
466 | } | |
467 | ||
f298d071 | 468 | /* Takes the ownership of bs_opts */ |
18e46a03 MA |
469 | static BlockBackend *blockdev_init(const char *file, QDict *bs_opts, |
470 | Error **errp) | |
666daa68 MA |
471 | { |
472 | const char *buf; | |
666daa68 MA |
473 | int bdrv_flags = 0; |
474 | int on_read_error, on_write_error; | |
b2aaf354 | 475 | OnOffAuto account_invalid, account_failed; |
f87a0e29 | 476 | bool writethrough, read_only; |
26f54e9a | 477 | BlockBackend *blk; |
a0f1eab1 | 478 | BlockDriverState *bs; |
cc0681c4 | 479 | ThrottleConfig cfg; |
666daa68 | 480 | int snapshot = 0; |
c546194f | 481 | Error *error = NULL; |
0006383e | 482 | QemuOpts *opts; |
40119eff AG |
483 | QDict *interval_dict = NULL; |
484 | QList *interval_list = NULL; | |
0006383e | 485 | const char *id; |
fbf8175e HR |
486 | BlockdevDetectZeroesOptions detect_zeroes = |
487 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF; | |
488 | const char *throttling_group = NULL; | |
666daa68 | 489 | |
f298d071 KW |
490 | /* Check common options by copying from bs_opts to opts, all other options |
491 | * stay in bs_opts for processing by bdrv_open(). */ | |
492 | id = qdict_get_try_str(bs_opts, "id"); | |
c6ecec43 MA |
493 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, errp); |
494 | if (!opts) { | |
6376f952 | 495 | goto err_no_opts; |
0006383e KW |
496 | } |
497 | ||
668f62ec | 498 | if (!qemu_opts_absorb_qdict(opts, bs_opts, errp)) { |
ec9c10d2 | 499 | goto early_err; |
0006383e KW |
500 | } |
501 | ||
502 | if (id) { | |
503 | qdict_del(bs_opts, "id"); | |
504 | } | |
505 | ||
666daa68 | 506 | /* extract parameters */ |
666daa68 | 507 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
666daa68 | 508 | |
b2aaf354 DL |
509 | account_invalid = account_get_opt(opts, "stats-account-invalid"); |
510 | account_failed = account_get_opt(opts, "stats-account-failed"); | |
362e9299 | 511 | |
e4b24b49 KW |
512 | writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true); |
513 | ||
ff356ee4 AG |
514 | id = qemu_opts_id(opts); |
515 | ||
40119eff AG |
516 | qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals."); |
517 | qdict_array_split(interval_dict, &interval_list); | |
518 | ||
519 | if (qdict_size(interval_dict) != 0) { | |
520 | error_setg(errp, "Invalid option stats-intervals.%s", | |
521 | qdict_first(interval_dict)->key); | |
522 | goto early_err; | |
523 | } | |
2be5506f | 524 | |
fbf8175e HR |
525 | extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg, |
526 | &detect_zeroes, &error); | |
527 | if (error) { | |
528 | error_propagate(errp, error); | |
529 | goto early_err; | |
666daa68 | 530 | } |
666daa68 MA |
531 | |
532 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
c8057f95 | 533 | if (is_help_option(buf)) { |
cdcd4361 | 534 | qemu_printf("Supported formats:"); |
9ac404c5 | 535 | bdrv_iterate_format(bdrv_format_print, NULL, false); |
cdcd4361 | 536 | qemu_printf("\nSupported formats (read-only):"); |
9ac404c5 | 537 | bdrv_iterate_format(bdrv_format_print, NULL, true); |
cdcd4361 | 538 | qemu_printf("\n"); |
ec9c10d2 | 539 | goto early_err; |
666daa68 | 540 | } |
74fe54f2 | 541 | |
e4342ce5 HR |
542 | if (qdict_haskey(bs_opts, "driver")) { |
543 | error_setg(errp, "Cannot specify both 'driver' and 'format'"); | |
ec9c10d2 | 544 | goto early_err; |
6db5f5d6 | 545 | } |
46f5ac20 | 546 | qdict_put_str(bs_opts, "driver", buf); |
666daa68 MA |
547 | } |
548 | ||
92aa5c6d | 549 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 550 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
b681072d | 551 | on_write_error = parse_block_error_action(buf, 0, &error); |
84d18f06 | 552 | if (error) { |
b681072d | 553 | error_propagate(errp, error); |
ec9c10d2 | 554 | goto early_err; |
666daa68 MA |
555 | } |
556 | } | |
557 | ||
92aa5c6d | 558 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 559 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
b681072d | 560 | on_read_error = parse_block_error_action(buf, 1, &error); |
84d18f06 | 561 | if (error) { |
b681072d | 562 | error_propagate(errp, error); |
ec9c10d2 | 563 | goto early_err; |
666daa68 MA |
564 | } |
565 | } | |
566 | ||
5ec18f8c | 567 | if (snapshot) { |
91a097e7 | 568 | bdrv_flags |= BDRV_O_SNAPSHOT; |
5ec18f8c HR |
569 | } |
570 | ||
f87a0e29 AG |
571 | read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false); |
572 | ||
326642bc | 573 | /* init */ |
39c4ae94 | 574 | if ((!file || !*file) && !qdict_size(bs_opts)) { |
5ec18f8c HR |
575 | BlockBackendRootState *blk_rs; |
576 | ||
d861ab3a | 577 | blk = blk_new(qemu_get_aio_context(), 0, BLK_PERM_ALL); |
5ec18f8c | 578 | blk_rs = blk_get_root_state(blk); |
260242a8 | 579 | blk_rs->open_flags = bdrv_flags | (read_only ? 0 : BDRV_O_RDWR); |
5ec18f8c HR |
580 | blk_rs->detect_zeroes = detect_zeroes; |
581 | ||
cb3e7f08 | 582 | qobject_unref(bs_opts); |
e4342ce5 HR |
583 | } else { |
584 | if (file && !*file) { | |
c2ad1b0c | 585 | file = NULL; |
c2ad1b0c | 586 | } |
666daa68 | 587 | |
91a097e7 KW |
588 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
589 | * with other callers) rather than what we want as the real defaults. | |
590 | * Apply the defaults here instead. */ | |
91a097e7 KW |
591 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); |
592 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
f87a0e29 AG |
593 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, |
594 | read_only ? "on" : "off"); | |
9384a444 | 595 | qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on"); |
72e775c7 | 596 | assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0); |
91a097e7 | 597 | |
12d5ee3a KW |
598 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
599 | bdrv_flags |= BDRV_O_INACTIVE; | |
600 | } | |
601 | ||
efaa7c4e | 602 | blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp); |
e4342ce5 HR |
603 | if (!blk) { |
604 | goto err_no_bs_opts; | |
605 | } | |
606 | bs = blk_bs(blk); | |
ed9d4205 | 607 | |
5ec18f8c | 608 | bs->detect_zeroes = detect_zeroes; |
666daa68 | 609 | |
9caa6f3d | 610 | block_acct_setup(blk_get_stats(blk), account_invalid, account_failed); |
2be5506f | 611 | |
40119eff AG |
612 | if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) { |
613 | blk_unref(blk); | |
614 | blk = NULL; | |
615 | goto err_no_bs_opts; | |
2be5506f | 616 | } |
666daa68 MA |
617 | } |
618 | ||
7ca7f0f6 KW |
619 | /* disk I/O throttling */ |
620 | if (throttle_enabled(&cfg)) { | |
621 | if (!throttling_group) { | |
ff356ee4 | 622 | throttling_group = id; |
7ca7f0f6 KW |
623 | } |
624 | blk_io_limits_enable(blk, throttling_group); | |
625 | blk_set_io_limits(blk, &cfg); | |
626 | } | |
627 | ||
e4b24b49 | 628 | blk_set_enable_write_cache(blk, !writethrough); |
5ec18f8c | 629 | blk_set_on_error(blk, on_read_error, on_write_error); |
0006383e | 630 | |
ff356ee4 | 631 | if (!monitor_add_blk(blk, id, errp)) { |
efaa7c4e HR |
632 | blk_unref(blk); |
633 | blk = NULL; | |
634 | goto err_no_bs_opts; | |
635 | } | |
636 | ||
e4342ce5 | 637 | err_no_bs_opts: |
0006383e | 638 | qemu_opts_del(opts); |
cb3e7f08 MAL |
639 | qobject_unref(interval_dict); |
640 | qobject_unref(interval_list); | |
18e46a03 | 641 | return blk; |
a9ae2bff | 642 | |
ec9c10d2 | 643 | early_err: |
ec9c10d2 | 644 | qemu_opts_del(opts); |
cb3e7f08 MAL |
645 | qobject_unref(interval_dict); |
646 | qobject_unref(interval_list); | |
6376f952 | 647 | err_no_opts: |
cb3e7f08 | 648 | qobject_unref(bs_opts); |
a9ae2bff | 649 | return NULL; |
666daa68 MA |
650 | } |
651 | ||
bd745e23 | 652 | /* Takes the ownership of bs_opts */ |
89802d5a | 653 | BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp) |
bd745e23 | 654 | { |
bd745e23 HR |
655 | int bdrv_flags = 0; |
656 | ||
b4ad82aa | 657 | GLOBAL_STATE_CODE(); |
a81d6164 KW |
658 | /* bdrv_open() defaults to the values in bdrv_flags (for compatibility |
659 | * with other callers) rather than what we want as the real defaults. | |
660 | * Apply the defaults here instead. */ | |
a81d6164 KW |
661 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off"); |
662 | qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off"); | |
f87a0e29 | 663 | qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off"); |
a81d6164 | 664 | |
12d5ee3a KW |
665 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
666 | bdrv_flags |= BDRV_O_INACTIVE; | |
667 | } | |
668 | ||
74e1ae7c | 669 | return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp); |
bd745e23 HR |
670 | } |
671 | ||
9c4218e9 HR |
672 | void blockdev_close_all_bdrv_states(void) |
673 | { | |
674 | BlockDriverState *bs, *next_bs; | |
675 | ||
b4ad82aa | 676 | GLOBAL_STATE_CODE(); |
9c4218e9 HR |
677 | QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) { |
678 | AioContext *ctx = bdrv_get_aio_context(bs); | |
679 | ||
680 | aio_context_acquire(ctx); | |
681 | bdrv_unref(bs); | |
682 | aio_context_release(ctx); | |
683 | } | |
684 | } | |
685 | ||
262b4e8f HR |
686 | /* Iterates over the list of monitor-owned BlockDriverStates */ |
687 | BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs) | |
688 | { | |
f791bf7f | 689 | GLOBAL_STATE_CODE(); |
262b4e8f HR |
690 | return bs ? QTAILQ_NEXT(bs, monitor_list) |
691 | : QTAILQ_FIRST(&monitor_bdrv_states); | |
692 | } | |
693 | ||
c75d7f71 | 694 | static bool qemu_opt_rename(QemuOpts *opts, const char *from, const char *to, |
5abbf0ee | 695 | Error **errp) |
57975222 KW |
696 | { |
697 | const char *value; | |
698 | ||
699 | value = qemu_opt_get(opts, from); | |
700 | if (value) { | |
5abbf0ee KW |
701 | if (qemu_opt_find(opts, to)) { |
702 | error_setg(errp, "'%s' and its alias '%s' can't be used at the " | |
703 | "same time", to, from); | |
c75d7f71 | 704 | return false; |
5abbf0ee | 705 | } |
20d6cd47 JL |
706 | } |
707 | ||
708 | /* rename all items in opts */ | |
709 | while ((value = qemu_opt_get(opts, from))) { | |
f43e47db | 710 | qemu_opt_set(opts, to, value, &error_abort); |
57975222 KW |
711 | qemu_opt_unset(opts, from); |
712 | } | |
c75d7f71 | 713 | return true; |
57975222 KW |
714 | } |
715 | ||
33cb7dc8 KW |
716 | QemuOptsList qemu_legacy_drive_opts = { |
717 | .name = "drive", | |
718 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
719 | .desc = { | |
720 | { | |
87a899c5 KW |
721 | .name = "bus", |
722 | .type = QEMU_OPT_NUMBER, | |
723 | .help = "bus number", | |
724 | },{ | |
725 | .name = "unit", | |
726 | .type = QEMU_OPT_NUMBER, | |
727 | .help = "unit number (i.e. lun for scsi)", | |
728 | },{ | |
729 | .name = "index", | |
730 | .type = QEMU_OPT_NUMBER, | |
731 | .help = "index number", | |
732 | },{ | |
33cb7dc8 KW |
733 | .name = "media", |
734 | .type = QEMU_OPT_STRING, | |
735 | .help = "media type (disk, cdrom)", | |
593d464b KW |
736 | },{ |
737 | .name = "if", | |
738 | .type = QEMU_OPT_STRING, | |
739 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
d095b465 HR |
740 | },{ |
741 | .name = "file", | |
742 | .type = QEMU_OPT_STRING, | |
743 | .help = "file name", | |
33cb7dc8 | 744 | }, |
0ebd24e0 KW |
745 | |
746 | /* Options that are passed on, but have special semantics with -drive */ | |
747 | { | |
4e200cf8 | 748 | .name = BDRV_OPT_READ_ONLY, |
0ebd24e0 KW |
749 | .type = QEMU_OPT_BOOL, |
750 | .help = "open drive file as read-only", | |
ee13ed1c KW |
751 | },{ |
752 | .name = "rerror", | |
753 | .type = QEMU_OPT_STRING, | |
754 | .help = "read error action", | |
755 | },{ | |
756 | .name = "werror", | |
757 | .type = QEMU_OPT_STRING, | |
758 | .help = "write error action", | |
0ebd24e0 KW |
759 | },{ |
760 | .name = "copy-on-read", | |
761 | .type = QEMU_OPT_BOOL, | |
762 | .help = "copy read data from backing file into image file", | |
763 | }, | |
764 | ||
33cb7dc8 KW |
765 | { /* end of list */ } |
766 | }, | |
767 | }; | |
768 | ||
c4f26c9f MA |
769 | DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type, |
770 | Error **errp) | |
57975222 | 771 | { |
29c4e2b5 | 772 | const char *value; |
18e46a03 | 773 | BlockBackend *blk; |
33cb7dc8 | 774 | DriveInfo *dinfo = NULL; |
f298d071 | 775 | QDict *bs_opts; |
33cb7dc8 KW |
776 | QemuOpts *legacy_opts; |
777 | DriveMediaType media = MEDIA_DISK; | |
593d464b | 778 | BlockInterfaceType type; |
87a899c5 | 779 | int max_devs, bus_id, unit_id, index; |
ee13ed1c | 780 | const char *werror, *rerror; |
a7fdbcf0 FZ |
781 | bool read_only = false; |
782 | bool copy_on_read; | |
d095b465 | 783 | const char *filename; |
247147fb | 784 | int i; |
29c4e2b5 | 785 | |
c5be7445 EGE |
786 | GLOBAL_STATE_CODE(); |
787 | ||
57975222 | 788 | /* Change legacy command line options into QMP ones */ |
247147fb KW |
789 | static const struct { |
790 | const char *from; | |
791 | const char *to; | |
792 | } opt_renames[] = { | |
793 | { "iops", "throttling.iops-total" }, | |
794 | { "iops_rd", "throttling.iops-read" }, | |
795 | { "iops_wr", "throttling.iops-write" }, | |
57975222 | 796 | |
247147fb KW |
797 | { "bps", "throttling.bps-total" }, |
798 | { "bps_rd", "throttling.bps-read" }, | |
799 | { "bps_wr", "throttling.bps-write" }, | |
57975222 | 800 | |
247147fb KW |
801 | { "iops_max", "throttling.iops-total-max" }, |
802 | { "iops_rd_max", "throttling.iops-read-max" }, | |
803 | { "iops_wr_max", "throttling.iops-write-max" }, | |
3e9fab69 | 804 | |
247147fb KW |
805 | { "bps_max", "throttling.bps-total-max" }, |
806 | { "bps_rd_max", "throttling.bps-read-max" }, | |
807 | { "bps_wr_max", "throttling.bps-write-max" }, | |
3e9fab69 | 808 | |
247147fb | 809 | { "iops_size", "throttling.iops-size" }, |
2024c1df | 810 | |
76f4afb4 AG |
811 | { "group", "throttling.group" }, |
812 | ||
4e200cf8 | 813 | { "readonly", BDRV_OPT_READ_ONLY }, |
247147fb KW |
814 | }; |
815 | ||
816 | for (i = 0; i < ARRAY_SIZE(opt_renames); i++) { | |
235e59cf | 817 | if (!qemu_opt_rename(all_opts, opt_renames[i].from, |
668f62ec | 818 | opt_renames[i].to, errp)) { |
5abbf0ee KW |
819 | return NULL; |
820 | } | |
247147fb | 821 | } |
0f227a94 | 822 | |
29c4e2b5 KW |
823 | value = qemu_opt_get(all_opts, "cache"); |
824 | if (value) { | |
825 | int flags = 0; | |
04feb4a5 | 826 | bool writethrough; |
29c4e2b5 | 827 | |
04feb4a5 | 828 | if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) { |
c4f26c9f | 829 | error_setg(errp, "invalid cache option"); |
29c4e2b5 KW |
830 | return NULL; |
831 | } | |
832 | ||
833 | /* Specific options take precedence */ | |
54861b92 KW |
834 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) { |
835 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB, | |
04feb4a5 | 836 | !writethrough, &error_abort); |
29c4e2b5 | 837 | } |
54861b92 KW |
838 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) { |
839 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT, | |
cccb7967 | 840 | !!(flags & BDRV_O_NOCACHE), &error_abort); |
29c4e2b5 | 841 | } |
54861b92 KW |
842 | if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) { |
843 | qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH, | |
cccb7967 | 844 | !!(flags & BDRV_O_NO_FLUSH), &error_abort); |
29c4e2b5 KW |
845 | } |
846 | qemu_opt_unset(all_opts, "cache"); | |
847 | } | |
848 | ||
f298d071 KW |
849 | /* Get a QDict for processing the options */ |
850 | bs_opts = qdict_new(); | |
851 | qemu_opts_to_qdict(all_opts, bs_opts); | |
852 | ||
87ea75d5 PC |
853 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, |
854 | &error_abort); | |
af175e85 | 855 | if (!qemu_opts_absorb_qdict(legacy_opts, bs_opts, errp)) { |
33cb7dc8 KW |
856 | goto fail; |
857 | } | |
858 | ||
859 | /* Media type */ | |
860 | value = qemu_opt_get(legacy_opts, "media"); | |
861 | if (value) { | |
862 | if (!strcmp(value, "disk")) { | |
863 | media = MEDIA_DISK; | |
864 | } else if (!strcmp(value, "cdrom")) { | |
865 | media = MEDIA_CDROM; | |
a7fdbcf0 | 866 | read_only = true; |
33cb7dc8 | 867 | } else { |
c4f26c9f | 868 | error_setg(errp, "'%s' invalid media", value); |
33cb7dc8 KW |
869 | goto fail; |
870 | } | |
871 | } | |
872 | ||
0ebd24e0 | 873 | /* copy-on-read is disabled with a warning for read-only devices */ |
4e200cf8 | 874 | read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false); |
0ebd24e0 KW |
875 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); |
876 | ||
877 | if (read_only && copy_on_read) { | |
3dc6f869 | 878 | warn_report("disabling copy-on-read on read-only drive"); |
0ebd24e0 KW |
879 | copy_on_read = false; |
880 | } | |
881 | ||
46f5ac20 EB |
882 | qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off"); |
883 | qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off"); | |
0ebd24e0 | 884 | |
593d464b KW |
885 | /* Controller type */ |
886 | value = qemu_opt_get(legacy_opts, "if"); | |
887 | if (value) { | |
888 | for (type = 0; | |
889 | type < IF_COUNT && strcmp(value, if_name[type]); | |
890 | type++) { | |
891 | } | |
892 | if (type == IF_COUNT) { | |
c4f26c9f | 893 | error_setg(errp, "unsupported bus type '%s'", value); |
593d464b KW |
894 | goto fail; |
895 | } | |
896 | } else { | |
897 | type = block_default_type; | |
898 | } | |
899 | ||
87a899c5 KW |
900 | /* Device address specified by bus/unit or index. |
901 | * If none was specified, try to find the first free one. */ | |
902 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
903 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
904 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
905 | ||
906 | max_devs = if_max_devs[type]; | |
907 | ||
908 | if (index != -1) { | |
909 | if (bus_id != 0 || unit_id != -1) { | |
c4f26c9f | 910 | error_setg(errp, "index cannot be used with bus and unit"); |
87a899c5 KW |
911 | goto fail; |
912 | } | |
913 | bus_id = drive_index_to_bus_id(type, index); | |
914 | unit_id = drive_index_to_unit_id(type, index); | |
915 | } | |
916 | ||
917 | if (unit_id == -1) { | |
918 | unit_id = 0; | |
919 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
920 | unit_id++; | |
921 | if (max_devs && unit_id >= max_devs) { | |
922 | unit_id -= max_devs; | |
923 | bus_id++; | |
924 | } | |
925 | } | |
926 | } | |
927 | ||
928 | if (max_devs && unit_id >= max_devs) { | |
c4f26c9f | 929 | error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1); |
87a899c5 KW |
930 | goto fail; |
931 | } | |
932 | ||
933 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
c4f26c9f MA |
934 | error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists", |
935 | bus_id, unit_id, index); | |
87a899c5 KW |
936 | goto fail; |
937 | } | |
938 | ||
939 | /* no id supplied -> create one */ | |
940 | if (qemu_opts_id(all_opts) == NULL) { | |
941 | char *new_id; | |
942 | const char *mediastr = ""; | |
943 | if (type == IF_IDE || type == IF_SCSI) { | |
944 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
945 | } | |
946 | if (max_devs) { | |
947 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
948 | mediastr, unit_id); | |
949 | } else { | |
950 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
951 | mediastr, unit_id); | |
952 | } | |
46f5ac20 | 953 | qdict_put_str(bs_opts, "id", new_id); |
87a899c5 KW |
954 | g_free(new_id); |
955 | } | |
956 | ||
394c7d4d | 957 | /* Add virtio block device */ |
394c7d4d KW |
958 | if (type == IF_VIRTIO) { |
959 | QemuOpts *devopts; | |
87ea75d5 PC |
960 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
961 | &error_abort); | |
9db1d3a2 | 962 | qemu_opt_set(devopts, "driver", "virtio-blk", &error_abort); |
f43e47db MA |
963 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"), |
964 | &error_abort); | |
394c7d4d KW |
965 | } |
966 | ||
d095b465 HR |
967 | filename = qemu_opt_get(legacy_opts, "file"); |
968 | ||
ee13ed1c KW |
969 | /* Check werror/rerror compatibility with if=... */ |
970 | werror = qemu_opt_get(legacy_opts, "werror"); | |
971 | if (werror != NULL) { | |
972 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
973 | type != IF_NONE) { | |
c4f26c9f | 974 | error_setg(errp, "werror is not supported by this bus type"); |
ee13ed1c KW |
975 | goto fail; |
976 | } | |
46f5ac20 | 977 | qdict_put_str(bs_opts, "werror", werror); |
ee13ed1c KW |
978 | } |
979 | ||
980 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
981 | if (rerror != NULL) { | |
982 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
983 | type != IF_NONE) { | |
c4f26c9f | 984 | error_setg(errp, "rerror is not supported by this bus type"); |
ee13ed1c KW |
985 | goto fail; |
986 | } | |
46f5ac20 | 987 | qdict_put_str(bs_opts, "rerror", rerror); |
ee13ed1c KW |
988 | } |
989 | ||
2d246f01 | 990 | /* Actual block device init: Functionality shared with blockdev-add */ |
992861fb | 991 | blk = blockdev_init(filename, bs_opts, errp); |
3cb0e25c | 992 | bs_opts = NULL; |
18e46a03 | 993 | if (!blk) { |
2d246f01 KW |
994 | goto fail; |
995 | } | |
996 | ||
26f8b3a8 MA |
997 | /* Create legacy DriveInfo */ |
998 | dinfo = g_malloc0(sizeof(*dinfo)); | |
f298d071 | 999 | dinfo->opts = all_opts; |
2d246f01 | 1000 | |
ee13ed1c | 1001 | dinfo->type = type; |
87a899c5 KW |
1002 | dinfo->bus = bus_id; |
1003 | dinfo->unit = unit_id; | |
bcf83158 | 1004 | |
26f8b3a8 MA |
1005 | blk_set_legacy_dinfo(blk, dinfo); |
1006 | ||
e34ef046 KW |
1007 | switch(type) { |
1008 | case IF_IDE: | |
1009 | case IF_SCSI: | |
1010 | case IF_XEN: | |
1011 | case IF_NONE: | |
1012 | dinfo->media_cd = media == MEDIA_CDROM; | |
1013 | break; | |
1014 | default: | |
1015 | break; | |
1016 | } | |
1017 | ||
2d246f01 | 1018 | fail: |
33cb7dc8 | 1019 | qemu_opts_del(legacy_opts); |
cb3e7f08 | 1020 | qobject_unref(bs_opts); |
2d246f01 | 1021 | return dinfo; |
57975222 KW |
1022 | } |
1023 | ||
b6c1bae5 KW |
1024 | static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp) |
1025 | { | |
1026 | BlockDriverState *bs; | |
1e97be91 | 1027 | AioContext *aio_context; |
b6c1bae5 KW |
1028 | |
1029 | bs = bdrv_lookup_bs(name, name, errp); | |
1030 | if (bs == NULL) { | |
1031 | return NULL; | |
1032 | } | |
1033 | ||
1034 | if (!bdrv_is_root_node(bs)) { | |
1035 | error_setg(errp, "Need a root block node"); | |
1036 | return NULL; | |
1037 | } | |
1038 | ||
1e97be91 EGE |
1039 | aio_context = bdrv_get_aio_context(bs); |
1040 | aio_context_acquire(aio_context); | |
1041 | ||
b6c1bae5 KW |
1042 | if (!bdrv_is_inserted(bs)) { |
1043 | error_setg(errp, "Device has no medium"); | |
1e97be91 | 1044 | bs = NULL; |
b6c1bae5 KW |
1045 | } |
1046 | ||
1e97be91 EGE |
1047 | aio_context_release(aio_context); |
1048 | ||
b6c1bae5 KW |
1049 | return bs; |
1050 | } | |
1051 | ||
10f75907 | 1052 | static void blockdev_do_action(TransactionAction *action, Error **errp) |
6cc2a415 | 1053 | { |
c8a83e85 | 1054 | TransactionActionList list; |
6cc2a415 | 1055 | |
10f75907 | 1056 | list.value = action; |
6cc2a415 | 1057 | list.next = NULL; |
238e9202 | 1058 | qmp_transaction(&list, NULL, errp); |
6cc2a415 PB |
1059 | } |
1060 | ||
54fde4ff | 1061 | void qmp_blockdev_snapshot_sync(const char *device, const char *node_name, |
0901f67e | 1062 | const char *snapshot_file, |
0901f67e | 1063 | const char *snapshot_node_name, |
54fde4ff | 1064 | const char *format, |
0901f67e | 1065 | bool has_mode, NewImageMode mode, Error **errp) |
f8882568 | 1066 | { |
a911e6ae | 1067 | BlockdevSnapshotSync snapshot = { |
6cc2a415 | 1068 | .device = (char *) device, |
0901f67e | 1069 | .node_name = (char *) node_name, |
6cc2a415 | 1070 | .snapshot_file = (char *) snapshot_file, |
0901f67e | 1071 | .snapshot_node_name = (char *) snapshot_node_name, |
6cc2a415 PB |
1072 | .format = (char *) format, |
1073 | .has_mode = has_mode, | |
1074 | .mode = mode, | |
1075 | }; | |
10f75907 EB |
1076 | TransactionAction action = { |
1077 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, | |
32bafa8f | 1078 | .u.blockdev_snapshot_sync.data = &snapshot, |
10f75907 EB |
1079 | }; |
1080 | blockdev_do_action(&action, errp); | |
f8882568 JS |
1081 | } |
1082 | ||
43de7e2d AG |
1083 | void qmp_blockdev_snapshot(const char *node, const char *overlay, |
1084 | Error **errp) | |
1085 | { | |
1086 | BlockdevSnapshot snapshot_data = { | |
1087 | .node = (char *) node, | |
1088 | .overlay = (char *) overlay | |
1089 | }; | |
10f75907 EB |
1090 | TransactionAction action = { |
1091 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT, | |
32bafa8f | 1092 | .u.blockdev_snapshot.data = &snapshot_data, |
10f75907 EB |
1093 | }; |
1094 | blockdev_do_action(&action, errp); | |
43de7e2d AG |
1095 | } |
1096 | ||
f323bc9e WX |
1097 | void qmp_blockdev_snapshot_internal_sync(const char *device, |
1098 | const char *name, | |
1099 | Error **errp) | |
1100 | { | |
1101 | BlockdevSnapshotInternal snapshot = { | |
1102 | .device = (char *) device, | |
1103 | .name = (char *) name | |
1104 | }; | |
10f75907 EB |
1105 | TransactionAction action = { |
1106 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
32bafa8f | 1107 | .u.blockdev_snapshot_internal_sync.data = &snapshot, |
10f75907 EB |
1108 | }; |
1109 | blockdev_do_action(&action, errp); | |
f323bc9e WX |
1110 | } |
1111 | ||
44e3e053 | 1112 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
44e3e053 | 1113 | const char *id, |
44e3e053 WX |
1114 | const char *name, |
1115 | Error **errp) | |
1116 | { | |
a0e8544c | 1117 | BlockDriverState *bs; |
4ef3982a | 1118 | AioContext *aio_context; |
44e3e053 WX |
1119 | QEMUSnapshotInfo sn; |
1120 | Error *local_err = NULL; | |
1121 | SnapshotInfo *info = NULL; | |
1122 | int ret; | |
1123 | ||
2dfb4c03 KW |
1124 | bs = qmp_get_root_bs(device, errp); |
1125 | if (!bs) { | |
44e3e053 WX |
1126 | return NULL; |
1127 | } | |
2dfb4c03 | 1128 | aio_context = bdrv_get_aio_context(bs); |
5433c24f | 1129 | aio_context_acquire(aio_context); |
44e3e053 | 1130 | |
44e3e053 WX |
1131 | if (!id && !name) { |
1132 | error_setg(errp, "Name or id must be provided"); | |
5433c24f | 1133 | goto out_aio_context; |
44e3e053 WX |
1134 | } |
1135 | ||
0b928854 SH |
1136 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) { |
1137 | goto out_aio_context; | |
1138 | } | |
1139 | ||
44e3e053 | 1140 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); |
84d18f06 | 1141 | if (local_err) { |
44e3e053 | 1142 | error_propagate(errp, local_err); |
4ef3982a | 1143 | goto out_aio_context; |
44e3e053 WX |
1144 | } |
1145 | if (!ret) { | |
1146 | error_setg(errp, | |
1147 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1148 | "device '%s'", | |
1149 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
4ef3982a | 1150 | goto out_aio_context; |
44e3e053 WX |
1151 | } |
1152 | ||
1153 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
84d18f06 | 1154 | if (local_err) { |
44e3e053 | 1155 | error_propagate(errp, local_err); |
4ef3982a | 1156 | goto out_aio_context; |
44e3e053 WX |
1157 | } |
1158 | ||
4ef3982a SH |
1159 | aio_context_release(aio_context); |
1160 | ||
5839e53b | 1161 | info = g_new0(SnapshotInfo, 1); |
44e3e053 WX |
1162 | info->id = g_strdup(sn.id_str); |
1163 | info->name = g_strdup(sn.name); | |
1164 | info->date_nsec = sn.date_nsec; | |
1165 | info->date_sec = sn.date_sec; | |
1166 | info->vm_state_size = sn.vm_state_size; | |
1167 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1168 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
b39847a5 PD |
1169 | if (sn.icount != -1ULL) { |
1170 | info->icount = sn.icount; | |
1171 | info->has_icount = true; | |
1172 | } | |
44e3e053 WX |
1173 | |
1174 | return info; | |
4ef3982a SH |
1175 | |
1176 | out_aio_context: | |
1177 | aio_context_release(aio_context); | |
1178 | return NULL; | |
44e3e053 | 1179 | } |
8802d1fd | 1180 | |
b756b9ce | 1181 | /* New and old BlockDriverState structs for atomic group operations */ |
ba0c86a3 | 1182 | |
50f43f0f | 1183 | typedef struct BlkActionState BlkActionState; |
ba0c86a3 | 1184 | |
50f43f0f JS |
1185 | /** |
1186 | * BlkActionOps: | |
1187 | * Table of operations that define an Action. | |
1188 | * | |
1189 | * @instance_size: Size of state struct, in bytes. | |
1190 | * @prepare: Prepare the work, must NOT be NULL. | |
1191 | * @commit: Commit the changes, can be NULL. | |
1192 | * @abort: Abort the changes on fail, can be NULL. | |
1193 | * @clean: Clean up resources after all transaction actions have called | |
1194 | * commit() or abort(). Can be NULL. | |
1195 | * | |
1196 | * Only prepare() may fail. In a single transaction, only one of commit() or | |
1197 | * abort() will be called. clean() will always be called if it is present. | |
ebc2752b EGE |
1198 | * |
1199 | * Always run under BQL. | |
50f43f0f JS |
1200 | */ |
1201 | typedef struct BlkActionOps { | |
ba0c86a3 | 1202 | size_t instance_size; |
50f43f0f JS |
1203 | void (*prepare)(BlkActionState *common, Error **errp); |
1204 | void (*commit)(BlkActionState *common); | |
1205 | void (*abort)(BlkActionState *common); | |
1206 | void (*clean)(BlkActionState *common); | |
1207 | } BlkActionOps; | |
ba0c86a3 | 1208 | |
50f43f0f JS |
1209 | /** |
1210 | * BlkActionState: | |
1211 | * Describes one Action's state within a Transaction. | |
1212 | * | |
1213 | * @action: QAPI-defined enum identifying which Action to perform. | |
1214 | * @ops: Table of ActionOps this Action can perform. | |
94d16a64 | 1215 | * @block_job_txn: Transaction which this action belongs to. |
50f43f0f JS |
1216 | * @entry: List membership for all Actions in this Transaction. |
1217 | * | |
1218 | * This structure must be arranged as first member in a subclassed type, | |
1219 | * assuming that the compiler will also arrange it to the same offsets as the | |
1220 | * base class. | |
ba0c86a3 | 1221 | */ |
50f43f0f | 1222 | struct BlkActionState { |
c8a83e85 | 1223 | TransactionAction *action; |
50f43f0f | 1224 | const BlkActionOps *ops; |
62c9e416 | 1225 | JobTxn *block_job_txn; |
94d16a64 | 1226 | TransactionProperties *txn_props; |
f4de0f8c | 1227 | QTAILQ_ENTRY(BlkActionState) entry; |
ba0c86a3 WX |
1228 | }; |
1229 | ||
bbe86010 WX |
1230 | /* internal snapshot private data */ |
1231 | typedef struct InternalSnapshotState { | |
50f43f0f | 1232 | BlkActionState common; |
bbe86010 WX |
1233 | BlockDriverState *bs; |
1234 | QEMUSnapshotInfo sn; | |
507306cc | 1235 | bool created; |
bbe86010 WX |
1236 | } InternalSnapshotState; |
1237 | ||
94d16a64 JS |
1238 | |
1239 | static int action_check_completion_mode(BlkActionState *s, Error **errp) | |
1240 | { | |
1241 | if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
1242 | error_setg(errp, | |
1243 | "Action '%s' does not support Transaction property " | |
1244 | "completion-mode = %s", | |
977c736f MA |
1245 | TransactionActionKind_str(s->action->type), |
1246 | ActionCompletionMode_str(s->txn_props->completion_mode)); | |
94d16a64 JS |
1247 | return -1; |
1248 | } | |
1249 | return 0; | |
1250 | } | |
1251 | ||
50f43f0f | 1252 | static void internal_snapshot_prepare(BlkActionState *common, |
bbe86010 WX |
1253 | Error **errp) |
1254 | { | |
f70edf99 | 1255 | Error *local_err = NULL; |
bbe86010 WX |
1256 | const char *device; |
1257 | const char *name; | |
1258 | BlockDriverState *bs; | |
1259 | QEMUSnapshotInfo old_sn, *sn; | |
1260 | bool ret; | |
f793dde0 | 1261 | int64_t rt; |
bbe86010 WX |
1262 | BlockdevSnapshotInternal *internal; |
1263 | InternalSnapshotState *state; | |
a36e458c | 1264 | AioContext *aio_context; |
bbe86010 WX |
1265 | int ret1; |
1266 | ||
6a8f9661 | 1267 | g_assert(common->action->type == |
bbe86010 | 1268 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); |
32bafa8f | 1269 | internal = common->action->u.blockdev_snapshot_internal_sync.data; |
bbe86010 WX |
1270 | state = DO_UPCAST(InternalSnapshotState, common, common); |
1271 | ||
1272 | /* 1. parse input */ | |
1273 | device = internal->device; | |
1274 | name = internal->name; | |
1275 | ||
1276 | /* 2. check for validation */ | |
94d16a64 JS |
1277 | if (action_check_completion_mode(common, errp) < 0) { |
1278 | return; | |
1279 | } | |
1280 | ||
75dfd402 KW |
1281 | bs = qmp_get_root_bs(device, errp); |
1282 | if (!bs) { | |
bbe86010 WX |
1283 | return; |
1284 | } | |
1285 | ||
a36e458c SH |
1286 | aio_context = bdrv_get_aio_context(bs); |
1287 | aio_context_acquire(aio_context); | |
5d6e96ef | 1288 | |
507306cc | 1289 | state->bs = bs; |
a36e458c SH |
1290 | |
1291 | /* Paired with .clean() */ | |
507306cc FZ |
1292 | bdrv_drained_begin(bs); |
1293 | ||
3dc7ca3c | 1294 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) { |
a36e458c | 1295 | goto out; |
3dc7ca3c SH |
1296 | } |
1297 | ||
bbe86010 | 1298 | if (bdrv_is_read_only(bs)) { |
81e5f78a | 1299 | error_setg(errp, "Device '%s' is read only", device); |
a36e458c | 1300 | goto out; |
bbe86010 WX |
1301 | } |
1302 | ||
1303 | if (!bdrv_can_snapshot(bs)) { | |
81e5f78a AG |
1304 | error_setg(errp, "Block format '%s' used by device '%s' " |
1305 | "does not support internal snapshots", | |
1306 | bs->drv->format_name, device); | |
a36e458c | 1307 | goto out; |
bbe86010 WX |
1308 | } |
1309 | ||
1310 | if (!strlen(name)) { | |
1311 | error_setg(errp, "Name is empty"); | |
a36e458c | 1312 | goto out; |
bbe86010 WX |
1313 | } |
1314 | ||
1315 | /* check whether a snapshot with name exist */ | |
f70edf99 MA |
1316 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, |
1317 | &local_err); | |
1318 | if (local_err) { | |
1319 | error_propagate(errp, local_err); | |
a36e458c | 1320 | goto out; |
bbe86010 WX |
1321 | } else if (ret) { |
1322 | error_setg(errp, | |
1323 | "Snapshot with name '%s' already exists on device '%s'", | |
1324 | name, device); | |
a36e458c | 1325 | goto out; |
bbe86010 WX |
1326 | } |
1327 | ||
1328 | /* 3. take the snapshot */ | |
1329 | sn = &state->sn; | |
1330 | pstrcpy(sn->name, sizeof(sn->name), name); | |
f793dde0 MAL |
1331 | rt = g_get_real_time(); |
1332 | sn->date_sec = rt / G_USEC_PER_SEC; | |
1333 | sn->date_nsec = (rt % G_USEC_PER_SEC) * 1000; | |
bbe86010 | 1334 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
b39847a5 PD |
1335 | if (replay_mode != REPLAY_MODE_NONE) { |
1336 | sn->icount = replay_get_current_icount(); | |
1337 | } else { | |
1338 | sn->icount = -1ULL; | |
1339 | } | |
bbe86010 WX |
1340 | |
1341 | ret1 = bdrv_snapshot_create(bs, sn); | |
1342 | if (ret1 < 0) { | |
1343 | error_setg_errno(errp, -ret1, | |
1344 | "Failed to create snapshot '%s' on device '%s'", | |
1345 | name, device); | |
a36e458c | 1346 | goto out; |
bbe86010 WX |
1347 | } |
1348 | ||
1349 | /* 4. succeed, mark a snapshot is created */ | |
507306cc | 1350 | state->created = true; |
a36e458c SH |
1351 | |
1352 | out: | |
1353 | aio_context_release(aio_context); | |
bbe86010 WX |
1354 | } |
1355 | ||
50f43f0f | 1356 | static void internal_snapshot_abort(BlkActionState *common) |
bbe86010 WX |
1357 | { |
1358 | InternalSnapshotState *state = | |
1359 | DO_UPCAST(InternalSnapshotState, common, common); | |
1360 | BlockDriverState *bs = state->bs; | |
1361 | QEMUSnapshotInfo *sn = &state->sn; | |
a36e458c | 1362 | AioContext *aio_context; |
bbe86010 WX |
1363 | Error *local_error = NULL; |
1364 | ||
507306cc | 1365 | if (!state->created) { |
bbe86010 WX |
1366 | return; |
1367 | } | |
1368 | ||
a36e458c SH |
1369 | aio_context = bdrv_get_aio_context(state->bs); |
1370 | aio_context_acquire(aio_context); | |
1371 | ||
bbe86010 | 1372 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { |
c29b77f9 MA |
1373 | error_reportf_err(local_error, |
1374 | "Failed to delete snapshot with id '%s' and " | |
1375 | "name '%s' on device '%s' in abort: ", | |
1376 | sn->id_str, sn->name, | |
1377 | bdrv_get_device_name(bs)); | |
bbe86010 | 1378 | } |
a36e458c SH |
1379 | |
1380 | aio_context_release(aio_context); | |
bbe86010 WX |
1381 | } |
1382 | ||
50f43f0f | 1383 | static void internal_snapshot_clean(BlkActionState *common) |
5d6e96ef SH |
1384 | { |
1385 | InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState, | |
1386 | common, common); | |
a36e458c | 1387 | AioContext *aio_context; |
5d6e96ef | 1388 | |
a36e458c SH |
1389 | if (!state->bs) { |
1390 | return; | |
5d6e96ef | 1391 | } |
a36e458c SH |
1392 | |
1393 | aio_context = bdrv_get_aio_context(state->bs); | |
1394 | aio_context_acquire(aio_context); | |
1395 | ||
1396 | bdrv_drained_end(state->bs); | |
1397 | ||
1398 | aio_context_release(aio_context); | |
5d6e96ef SH |
1399 | } |
1400 | ||
ba0c86a3 | 1401 | /* external snapshot private data */ |
ba5d6ab6 | 1402 | typedef struct ExternalSnapshotState { |
50f43f0f | 1403 | BlkActionState common; |
8802d1fd JC |
1404 | BlockDriverState *old_bs; |
1405 | BlockDriverState *new_bs; | |
067acf28 | 1406 | bool overlay_appended; |
ba5d6ab6 | 1407 | } ExternalSnapshotState; |
8802d1fd | 1408 | |
50f43f0f | 1409 | static void external_snapshot_prepare(BlkActionState *common, |
9b9877ee WX |
1410 | Error **errp) |
1411 | { | |
934aee14 | 1412 | int ret; |
5b363937 | 1413 | int flags = 0; |
43de7e2d | 1414 | QDict *options = NULL; |
9b9877ee | 1415 | Error *local_err = NULL; |
43de7e2d | 1416 | /* Device and node name of the image to generate the snapshot from */ |
e2a31e87 | 1417 | const char *device; |
0901f67e | 1418 | const char *node_name; |
43de7e2d AG |
1419 | /* Reference to the new image (for 'blockdev-snapshot') */ |
1420 | const char *snapshot_ref; | |
1421 | /* File name of the new image (for 'blockdev-snapshot-sync') */ | |
e2a31e87 | 1422 | const char *new_image_file; |
ba5d6ab6 SH |
1423 | ExternalSnapshotState *state = |
1424 | DO_UPCAST(ExternalSnapshotState, common, common); | |
c8a83e85 | 1425 | TransactionAction *action = common->action; |
2d24b60b | 1426 | AioContext *aio_context; |
d29d3d1f | 1427 | uint64_t perm, shared; |
9b9877ee | 1428 | |
43de7e2d AG |
1429 | /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar |
1430 | * purpose but a different set of parameters */ | |
1431 | switch (action->type) { | |
1432 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT: | |
1433 | { | |
32bafa8f | 1434 | BlockdevSnapshot *s = action->u.blockdev_snapshot.data; |
43de7e2d AG |
1435 | device = s->node; |
1436 | node_name = s->node; | |
1437 | new_image_file = NULL; | |
1438 | snapshot_ref = s->overlay; | |
1439 | } | |
1440 | break; | |
1441 | case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC: | |
1442 | { | |
32bafa8f | 1443 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
54fde4ff MA |
1444 | device = s->device; |
1445 | node_name = s->node_name; | |
43de7e2d AG |
1446 | new_image_file = s->snapshot_file; |
1447 | snapshot_ref = NULL; | |
1448 | } | |
1449 | break; | |
1450 | default: | |
1451 | g_assert_not_reached(); | |
e2a31e87 WX |
1452 | } |
1453 | ||
1454 | /* start processing */ | |
94d16a64 JS |
1455 | if (action_check_completion_mode(common, errp) < 0) { |
1456 | return; | |
1457 | } | |
1458 | ||
43de7e2d AG |
1459 | state->old_bs = bdrv_lookup_bs(device, node_name, errp); |
1460 | if (!state->old_bs) { | |
9b9877ee WX |
1461 | return; |
1462 | } | |
1463 | ||
2d24b60b SH |
1464 | aio_context = bdrv_get_aio_context(state->old_bs); |
1465 | aio_context_acquire(aio_context); | |
1466 | ||
1467 | /* Paired with .clean() */ | |
da763e83 | 1468 | bdrv_drained_begin(state->old_bs); |
5d6e96ef | 1469 | |
ba5d6ab6 | 1470 | if (!bdrv_is_inserted(state->old_bs)) { |
c6bd8c70 | 1471 | error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
2d24b60b | 1472 | goto out; |
9b9877ee WX |
1473 | } |
1474 | ||
3718d8ab FZ |
1475 | if (bdrv_op_is_blocked(state->old_bs, |
1476 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
2d24b60b | 1477 | goto out; |
9b9877ee WX |
1478 | } |
1479 | ||
ba5d6ab6 SH |
1480 | if (!bdrv_is_read_only(state->old_bs)) { |
1481 | if (bdrv_flush(state->old_bs)) { | |
c6bd8c70 | 1482 | error_setg(errp, QERR_IO_ERROR); |
2d24b60b | 1483 | goto out; |
9b9877ee WX |
1484 | } |
1485 | } | |
1486 | ||
43de7e2d | 1487 | if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) { |
32bafa8f | 1488 | BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data; |
54fde4ff | 1489 | const char *format = s->format ?: "qcow2"; |
43de7e2d | 1490 | enum NewImageMode mode; |
54fde4ff | 1491 | const char *snapshot_node_name = s->snapshot_node_name; |
9b9877ee | 1492 | |
43de7e2d | 1493 | if (node_name && !snapshot_node_name) { |
ef2e38a1 | 1494 | error_setg(errp, "New overlay node-name missing"); |
2d24b60b | 1495 | goto out; |
9b9877ee | 1496 | } |
9b9877ee | 1497 | |
43de7e2d AG |
1498 | if (snapshot_node_name && |
1499 | bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) { | |
ef2e38a1 | 1500 | error_setg(errp, "New overlay node-name already in use"); |
2d24b60b | 1501 | goto out; |
43de7e2d AG |
1502 | } |
1503 | ||
1504 | flags = state->old_bs->open_flags; | |
2a32c6e8 JS |
1505 | flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ); |
1506 | flags |= BDRV_O_NO_BACKING; | |
43de7e2d AG |
1507 | |
1508 | /* create new image w/backing file */ | |
1509 | mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1510 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
f86b8b58 KW |
1511 | int64_t size = bdrv_getlength(state->old_bs); |
1512 | if (size < 0) { | |
1513 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2d24b60b | 1514 | goto out; |
f86b8b58 | 1515 | } |
f30c66ba | 1516 | bdrv_refresh_filename(state->old_bs); |
e1355055 KW |
1517 | |
1518 | aio_context_release(aio_context); | |
43de7e2d AG |
1519 | bdrv_img_create(new_image_file, format, |
1520 | state->old_bs->filename, | |
1521 | state->old_bs->drv->format_name, | |
9217283d | 1522 | NULL, size, flags, false, &local_err); |
e1355055 KW |
1523 | aio_context_acquire(aio_context); |
1524 | ||
43de7e2d AG |
1525 | if (local_err) { |
1526 | error_propagate(errp, local_err); | |
2d24b60b | 1527 | goto out; |
43de7e2d AG |
1528 | } |
1529 | } | |
1530 | ||
1531 | options = qdict_new(); | |
d52e1a0e | 1532 | if (snapshot_node_name) { |
46f5ac20 | 1533 | qdict_put_str(options, "node-name", snapshot_node_name); |
43de7e2d | 1534 | } |
46f5ac20 | 1535 | qdict_put_str(options, "driver", format); |
0901f67e BC |
1536 | } |
1537 | ||
5b363937 HR |
1538 | state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags, |
1539 | errp); | |
f67503e5 | 1540 | /* We will manually add the backing_hd field to the bs later */ |
5b363937 | 1541 | if (!state->new_bs) { |
2d24b60b | 1542 | goto out; |
43de7e2d AG |
1543 | } |
1544 | ||
d29d3d1f KW |
1545 | /* |
1546 | * Allow attaching a backing file to an overlay that's already in use only | |
1547 | * if the parents don't assume that they are already seeing a valid image. | |
1548 | * (Specifically, allow it as a mirror target, which is write-only access.) | |
1549 | */ | |
1550 | bdrv_get_cumulative_perm(state->new_bs, &perm, &shared); | |
1551 | if (perm & BLK_PERM_CONSISTENT_READ) { | |
a2bb6f8c | 1552 | error_setg(errp, "The overlay is already in use"); |
2d24b60b | 1553 | goto out; |
43de7e2d AG |
1554 | } |
1555 | ||
7cc734a9 HR |
1556 | if (state->new_bs->drv->is_filter) { |
1557 | error_setg(errp, "Filters cannot be used as overlays"); | |
1558 | goto out; | |
1559 | } | |
1560 | ||
1561 | if (bdrv_cow_child(state->new_bs)) { | |
a2bb6f8c | 1562 | error_setg(errp, "The overlay already has a backing image"); |
2d24b60b | 1563 | goto out; |
08b24cfe AG |
1564 | } |
1565 | ||
1566 | if (!state->new_bs->drv->supports_backing) { | |
a2bb6f8c | 1567 | error_setg(errp, "The overlay does not support backing images"); |
2d24b60b | 1568 | goto out; |
b2c2832c KW |
1569 | } |
1570 | ||
934aee14 VSO |
1571 | ret = bdrv_append(state->new_bs, state->old_bs, errp); |
1572 | if (ret < 0) { | |
2d24b60b | 1573 | goto out; |
9b9877ee | 1574 | } |
067acf28 | 1575 | state->overlay_appended = true; |
2d24b60b SH |
1576 | |
1577 | out: | |
1578 | aio_context_release(aio_context); | |
9b9877ee WX |
1579 | } |
1580 | ||
50f43f0f | 1581 | static void external_snapshot_commit(BlkActionState *common) |
3b0047e8 | 1582 | { |
ba5d6ab6 SH |
1583 | ExternalSnapshotState *state = |
1584 | DO_UPCAST(ExternalSnapshotState, common, common); | |
2d24b60b SH |
1585 | AioContext *aio_context; |
1586 | ||
1587 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1588 | aio_context_acquire(aio_context); | |
ba0c86a3 | 1589 | |
3b0047e8 WX |
1590 | /* We don't need (or want) to use the transactional |
1591 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1592 | * don't want to abort all of them if one of them fails the reopen */ | |
d73415a3 | 1593 | if (!qatomic_read(&state->old_bs->copy_on_read)) { |
1b57774f | 1594 | bdrv_reopen_set_read_only(state->old_bs, true, NULL); |
4c844983 | 1595 | } |
2d24b60b SH |
1596 | |
1597 | aio_context_release(aio_context); | |
3b0047e8 WX |
1598 | } |
1599 | ||
50f43f0f | 1600 | static void external_snapshot_abort(BlkActionState *common) |
96b86bf7 | 1601 | { |
ba5d6ab6 SH |
1602 | ExternalSnapshotState *state = |
1603 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1604 | if (state->new_bs) { | |
067acf28 | 1605 | if (state->overlay_appended) { |
2d24b60b | 1606 | AioContext *aio_context; |
377410f6 SL |
1607 | AioContext *tmp_context; |
1608 | int ret; | |
2d24b60b SH |
1609 | |
1610 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1611 | aio_context_acquire(aio_context); | |
1612 | ||
719fc28c JC |
1613 | bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd() |
1614 | close state->old_bs; we need it */ | |
1615 | bdrv_set_backing_hd(state->new_bs, NULL, &error_abort); | |
377410f6 SL |
1616 | |
1617 | /* | |
1618 | * The call to bdrv_set_backing_hd() above returns state->old_bs to | |
1619 | * the main AioContext. As we're still going to be using it, return | |
1620 | * it to the AioContext it was before. | |
1621 | */ | |
1622 | tmp_context = bdrv_get_aio_context(state->old_bs); | |
1623 | if (aio_context != tmp_context) { | |
1624 | aio_context_release(aio_context); | |
1625 | aio_context_acquire(tmp_context); | |
1626 | ||
142e6907 EGE |
1627 | ret = bdrv_try_change_aio_context(state->old_bs, |
1628 | aio_context, NULL, NULL); | |
377410f6 SL |
1629 | assert(ret == 0); |
1630 | ||
1631 | aio_context_release(tmp_context); | |
1632 | aio_context_acquire(aio_context); | |
1633 | } | |
1634 | ||
5fe31c25 | 1635 | bdrv_replace_node(state->new_bs, state->old_bs, &error_abort); |
719fc28c | 1636 | bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */ |
2d24b60b SH |
1637 | |
1638 | aio_context_release(aio_context); | |
b2c2832c | 1639 | } |
96b86bf7 | 1640 | } |
da763e83 FZ |
1641 | } |
1642 | ||
50f43f0f | 1643 | static void external_snapshot_clean(BlkActionState *common) |
da763e83 FZ |
1644 | { |
1645 | ExternalSnapshotState *state = | |
1646 | DO_UPCAST(ExternalSnapshotState, common, common); | |
2d24b60b SH |
1647 | AioContext *aio_context; |
1648 | ||
1649 | if (!state->old_bs) { | |
1650 | return; | |
5d6e96ef | 1651 | } |
2d24b60b SH |
1652 | |
1653 | aio_context = bdrv_get_aio_context(state->old_bs); | |
1654 | aio_context_acquire(aio_context); | |
1655 | ||
1656 | bdrv_drained_end(state->old_bs); | |
1657 | bdrv_unref(state->new_bs); | |
1658 | ||
1659 | aio_context_release(aio_context); | |
96b86bf7 WX |
1660 | } |
1661 | ||
3037f364 | 1662 | typedef struct DriveBackupState { |
50f43f0f | 1663 | BlkActionState common; |
3037f364 SH |
1664 | BlockDriverState *bs; |
1665 | BlockJob *job; | |
1666 | } DriveBackupState; | |
1667 | ||
2288ccfa SL |
1668 | static BlockJob *do_backup_common(BackupCommon *backup, |
1669 | BlockDriverState *bs, | |
1670 | BlockDriverState *target_bs, | |
1671 | AioContext *aio_context, | |
1672 | JobTxn *txn, Error **errp); | |
78f51fde | 1673 | |
50f43f0f | 1674 | static void drive_backup_prepare(BlkActionState *common, Error **errp) |
3037f364 SH |
1675 | { |
1676 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1677 | DriveBackup *backup; | |
2288ccfa SL |
1678 | BlockDriverState *bs; |
1679 | BlockDriverState *target_bs; | |
1680 | BlockDriverState *source = NULL; | |
66d56054 | 1681 | AioContext *aio_context; |
3ea67e08 | 1682 | AioContext *old_context; |
04658a5b | 1683 | const char *format; |
2288ccfa | 1684 | QDict *options; |
3037f364 | 1685 | Error *local_err = NULL; |
2288ccfa SL |
1686 | int flags; |
1687 | int64_t size; | |
1688 | bool set_backing_hd = false; | |
3ea67e08 | 1689 | int ret; |
3037f364 | 1690 | |
6a8f9661 | 1691 | assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); |
32bafa8f | 1692 | backup = common->action->u.drive_backup.data; |
3037f364 | 1693 | |
2288ccfa SL |
1694 | if (!backup->has_mode) { |
1695 | backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
1696 | } | |
1697 | ||
85c9d133 | 1698 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
b7e4fa22 | 1699 | if (!bs) { |
1fdd4b7b FZ |
1700 | return; |
1701 | } | |
1702 | ||
2288ccfa SL |
1703 | if (!bs->drv) { |
1704 | error_setg(errp, "Device has no medium"); | |
1705 | return; | |
1706 | } | |
1707 | ||
66d56054 SH |
1708 | aio_context = bdrv_get_aio_context(bs); |
1709 | aio_context_acquire(aio_context); | |
1710 | ||
2842ff2d | 1711 | state->bs = bs; |
66d56054 | 1712 | /* Paired with .clean() */ |
b7e4fa22 | 1713 | bdrv_drained_begin(bs); |
66d56054 | 1714 | |
04658a5b MA |
1715 | format = backup->format; |
1716 | if (!format && backup->mode != NEW_IMAGE_MODE_EXISTING) { | |
1717 | format = bs->drv->format_name; | |
2288ccfa SL |
1718 | } |
1719 | ||
1720 | /* Early check to avoid creating target */ | |
1721 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { | |
1722 | goto out; | |
1723 | } | |
1724 | ||
1725 | flags = bs->open_flags | BDRV_O_RDWR; | |
1726 | ||
1727 | /* | |
1728 | * See if we have a backing HD we can use to create our new image | |
1729 | * on top of. | |
1730 | */ | |
1731 | if (backup->sync == MIRROR_SYNC_MODE_TOP) { | |
2b088c60 HR |
1732 | /* |
1733 | * Backup will not replace the source by the target, so none | |
1734 | * of the filters skipped here will be removed (in contrast to | |
1735 | * mirror). Therefore, we can skip all of them when looking | |
1736 | * for the first COW relationship. | |
1737 | */ | |
1738 | source = bdrv_cow_bs(bdrv_skip_filters(bs)); | |
2288ccfa SL |
1739 | if (!source) { |
1740 | backup->sync = MIRROR_SYNC_MODE_FULL; | |
1741 | } | |
1742 | } | |
1743 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
1744 | source = bs; | |
1745 | flags |= BDRV_O_NO_BACKING; | |
1746 | set_backing_hd = true; | |
1747 | } | |
1748 | ||
1749 | size = bdrv_getlength(bs); | |
1750 | if (size < 0) { | |
1751 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
1752 | goto out; | |
1753 | } | |
1754 | ||
1755 | if (backup->mode != NEW_IMAGE_MODE_EXISTING) { | |
04658a5b | 1756 | assert(format); |
2288ccfa | 1757 | if (source) { |
2b088c60 HR |
1758 | /* Implicit filters should not appear in the filename */ |
1759 | BlockDriverState *explicit_backing = | |
1760 | bdrv_skip_implicit_filters(source); | |
1761 | ||
1762 | bdrv_refresh_filename(explicit_backing); | |
04658a5b | 1763 | bdrv_img_create(backup->target, format, |
2b088c60 HR |
1764 | explicit_backing->filename, |
1765 | explicit_backing->drv->format_name, NULL, | |
2288ccfa SL |
1766 | size, flags, false, &local_err); |
1767 | } else { | |
04658a5b | 1768 | bdrv_img_create(backup->target, format, NULL, NULL, NULL, |
2288ccfa SL |
1769 | size, flags, false, &local_err); |
1770 | } | |
1771 | } | |
5d6e96ef | 1772 | |
84d18f06 | 1773 | if (local_err) { |
3037f364 | 1774 | error_propagate(errp, local_err); |
66d56054 | 1775 | goto out; |
3037f364 | 1776 | } |
66d56054 | 1777 | |
2288ccfa SL |
1778 | options = qdict_new(); |
1779 | qdict_put_str(options, "discard", "unmap"); | |
1780 | qdict_put_str(options, "detect-zeroes", "unmap"); | |
04658a5b MA |
1781 | if (format) { |
1782 | qdict_put_str(options, "driver", format); | |
2288ccfa SL |
1783 | } |
1784 | ||
1785 | target_bs = bdrv_open(backup->target, NULL, options, flags, errp); | |
1786 | if (!target_bs) { | |
1787 | goto out; | |
1788 | } | |
1789 | ||
142e6907 | 1790 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
3ea67e08 SL |
1791 | old_context = bdrv_get_aio_context(target_bs); |
1792 | aio_context_release(aio_context); | |
1793 | aio_context_acquire(old_context); | |
1794 | ||
142e6907 | 1795 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
3ea67e08 SL |
1796 | if (ret < 0) { |
1797 | bdrv_unref(target_bs); | |
1798 | aio_context_release(old_context); | |
1799 | return; | |
1800 | } | |
1801 | ||
1802 | aio_context_release(old_context); | |
1803 | aio_context_acquire(aio_context); | |
1804 | ||
2288ccfa | 1805 | if (set_backing_hd) { |
5a11a1ca | 1806 | if (bdrv_set_backing_hd(target_bs, source, errp) < 0) { |
2288ccfa SL |
1807 | goto unref; |
1808 | } | |
1809 | } | |
1810 | ||
2288ccfa SL |
1811 | state->job = do_backup_common(qapi_DriveBackup_base(backup), |
1812 | bs, target_bs, aio_context, | |
1813 | common->block_job_txn, errp); | |
1814 | ||
1815 | unref: | |
1816 | bdrv_unref(target_bs); | |
66d56054 SH |
1817 | out: |
1818 | aio_context_release(aio_context); | |
111049a4 | 1819 | } |
3037f364 | 1820 | |
111049a4 JS |
1821 | static void drive_backup_commit(BlkActionState *common) |
1822 | { | |
1823 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
66d56054 SH |
1824 | AioContext *aio_context; |
1825 | ||
1826 | aio_context = bdrv_get_aio_context(state->bs); | |
1827 | aio_context_acquire(aio_context); | |
1828 | ||
111049a4 | 1829 | assert(state->job); |
da01ff7f | 1830 | job_start(&state->job->job); |
66d56054 SH |
1831 | |
1832 | aio_context_release(aio_context); | |
3037f364 SH |
1833 | } |
1834 | ||
50f43f0f | 1835 | static void drive_backup_abort(BlkActionState *common) |
3037f364 SH |
1836 | { |
1837 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
3037f364 | 1838 | |
111049a4 | 1839 | if (state->job) { |
4cfb3f05 | 1840 | job_cancel_sync(&state->job->job, true); |
3037f364 SH |
1841 | } |
1842 | } | |
1843 | ||
50f43f0f | 1844 | static void drive_backup_clean(BlkActionState *common) |
5d6e96ef SH |
1845 | { |
1846 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
66d56054 | 1847 | AioContext *aio_context; |
5d6e96ef | 1848 | |
66d56054 SH |
1849 | if (!state->bs) { |
1850 | return; | |
5d6e96ef | 1851 | } |
66d56054 SH |
1852 | |
1853 | aio_context = bdrv_get_aio_context(state->bs); | |
1854 | aio_context_acquire(aio_context); | |
1855 | ||
1856 | bdrv_drained_end(state->bs); | |
1857 | ||
1858 | aio_context_release(aio_context); | |
5d6e96ef SH |
1859 | } |
1860 | ||
bd8baecd | 1861 | typedef struct BlockdevBackupState { |
50f43f0f | 1862 | BlkActionState common; |
bd8baecd FZ |
1863 | BlockDriverState *bs; |
1864 | BlockJob *job; | |
bd8baecd FZ |
1865 | } BlockdevBackupState; |
1866 | ||
50f43f0f | 1867 | static void blockdev_backup_prepare(BlkActionState *common, Error **errp) |
bd8baecd FZ |
1868 | { |
1869 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
1870 | BlockdevBackup *backup; | |
5b7bfe51 SL |
1871 | BlockDriverState *bs; |
1872 | BlockDriverState *target_bs; | |
edd5adee | 1873 | AioContext *aio_context; |
3ea67e08 SL |
1874 | AioContext *old_context; |
1875 | int ret; | |
bd8baecd | 1876 | |
6a8f9661 | 1877 | assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP); |
32bafa8f | 1878 | backup = common->action->u.blockdev_backup.data; |
bd8baecd | 1879 | |
930fe17f | 1880 | bs = bdrv_lookup_bs(backup->device, backup->device, errp); |
cef34eeb | 1881 | if (!bs) { |
ff52bf36 FZ |
1882 | return; |
1883 | } | |
1884 | ||
5b7bfe51 SL |
1885 | target_bs = bdrv_lookup_bs(backup->target, backup->target, errp); |
1886 | if (!target_bs) { | |
bd8baecd FZ |
1887 | return; |
1888 | } | |
1889 | ||
142e6907 | 1890 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
edd5adee | 1891 | aio_context = bdrv_get_aio_context(bs); |
3ea67e08 SL |
1892 | old_context = bdrv_get_aio_context(target_bs); |
1893 | aio_context_acquire(old_context); | |
1894 | ||
142e6907 | 1895 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
3ea67e08 SL |
1896 | if (ret < 0) { |
1897 | aio_context_release(old_context); | |
1898 | return; | |
1899 | } | |
1900 | ||
1901 | aio_context_release(old_context); | |
edd5adee | 1902 | aio_context_acquire(aio_context); |
cef34eeb | 1903 | state->bs = bs; |
edd5adee SH |
1904 | |
1905 | /* Paired with .clean() */ | |
ff52bf36 | 1906 | bdrv_drained_begin(state->bs); |
bd8baecd | 1907 | |
5b7bfe51 SL |
1908 | state->job = do_backup_common(qapi_BlockdevBackup_base(backup), |
1909 | bs, target_bs, aio_context, | |
1910 | common->block_job_txn, errp); | |
edd5adee | 1911 | |
edd5adee | 1912 | aio_context_release(aio_context); |
111049a4 | 1913 | } |
bd8baecd | 1914 | |
111049a4 JS |
1915 | static void blockdev_backup_commit(BlkActionState *common) |
1916 | { | |
1917 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
edd5adee SH |
1918 | AioContext *aio_context; |
1919 | ||
1920 | aio_context = bdrv_get_aio_context(state->bs); | |
1921 | aio_context_acquire(aio_context); | |
1922 | ||
111049a4 | 1923 | assert(state->job); |
da01ff7f | 1924 | job_start(&state->job->job); |
edd5adee SH |
1925 | |
1926 | aio_context_release(aio_context); | |
bd8baecd FZ |
1927 | } |
1928 | ||
50f43f0f | 1929 | static void blockdev_backup_abort(BlkActionState *common) |
bd8baecd FZ |
1930 | { |
1931 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
bd8baecd | 1932 | |
111049a4 | 1933 | if (state->job) { |
4cfb3f05 | 1934 | job_cancel_sync(&state->job->job, true); |
bd8baecd FZ |
1935 | } |
1936 | } | |
1937 | ||
50f43f0f | 1938 | static void blockdev_backup_clean(BlkActionState *common) |
bd8baecd FZ |
1939 | { |
1940 | BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common); | |
edd5adee | 1941 | AioContext *aio_context; |
bd8baecd | 1942 | |
edd5adee SH |
1943 | if (!state->bs) { |
1944 | return; | |
bd8baecd | 1945 | } |
edd5adee SH |
1946 | |
1947 | aio_context = bdrv_get_aio_context(state->bs); | |
1948 | aio_context_acquire(aio_context); | |
1949 | ||
1950 | bdrv_drained_end(state->bs); | |
1951 | ||
1952 | aio_context_release(aio_context); | |
bd8baecd FZ |
1953 | } |
1954 | ||
df9a681d | 1955 | typedef struct BlockDirtyBitmapState { |
50f43f0f | 1956 | BlkActionState common; |
df9a681d FZ |
1957 | BdrvDirtyBitmap *bitmap; |
1958 | BlockDriverState *bs; | |
df9a681d FZ |
1959 | HBitmap *backup; |
1960 | bool prepared; | |
c6490447 | 1961 | bool was_enabled; |
df9a681d FZ |
1962 | } BlockDirtyBitmapState; |
1963 | ||
50f43f0f | 1964 | static void block_dirty_bitmap_add_prepare(BlkActionState *common, |
df9a681d FZ |
1965 | Error **errp) |
1966 | { | |
1967 | Error *local_err = NULL; | |
1968 | BlockDirtyBitmapAdd *action; | |
1969 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
1970 | common, common); | |
1971 | ||
94d16a64 JS |
1972 | if (action_check_completion_mode(common, errp) < 0) { |
1973 | return; | |
1974 | } | |
1975 | ||
32bafa8f | 1976 | action = common->action->u.block_dirty_bitmap_add.data; |
df9a681d FZ |
1977 | /* AIO context taken and released within qmp_block_dirty_bitmap_add */ |
1978 | qmp_block_dirty_bitmap_add(action->node, action->name, | |
1979 | action->has_granularity, action->granularity, | |
fd5ae4cc | 1980 | action->has_persistent, action->persistent, |
0e2b7f09 | 1981 | action->has_disabled, action->disabled, |
df9a681d FZ |
1982 | &local_err); |
1983 | ||
1984 | if (!local_err) { | |
1985 | state->prepared = true; | |
1986 | } else { | |
1987 | error_propagate(errp, local_err); | |
1988 | } | |
1989 | } | |
1990 | ||
50f43f0f | 1991 | static void block_dirty_bitmap_add_abort(BlkActionState *common) |
df9a681d FZ |
1992 | { |
1993 | BlockDirtyBitmapAdd *action; | |
1994 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
1995 | common, common); | |
1996 | ||
32bafa8f | 1997 | action = common->action->u.block_dirty_bitmap_add.data; |
df9a681d FZ |
1998 | /* Should not be able to fail: IF the bitmap was added via .prepare(), |
1999 | * then the node reference and bitmap name must have been valid. | |
2000 | */ | |
2001 | if (state->prepared) { | |
2002 | qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort); | |
2003 | } | |
2004 | } | |
2005 | ||
50f43f0f | 2006 | static void block_dirty_bitmap_clear_prepare(BlkActionState *common, |
df9a681d FZ |
2007 | Error **errp) |
2008 | { | |
2009 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2010 | common, common); | |
2011 | BlockDirtyBitmap *action; | |
2012 | ||
94d16a64 JS |
2013 | if (action_check_completion_mode(common, errp) < 0) { |
2014 | return; | |
2015 | } | |
2016 | ||
32bafa8f | 2017 | action = common->action->u.block_dirty_bitmap_clear.data; |
df9a681d FZ |
2018 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2019 | action->name, | |
2020 | &state->bs, | |
df9a681d FZ |
2021 | errp); |
2022 | if (!state->bitmap) { | |
2023 | return; | |
2024 | } | |
2025 | ||
3ae96d66 | 2026 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_DEFAULT, errp)) { |
d6883bc9 | 2027 | return; |
df9a681d FZ |
2028 | } |
2029 | ||
2030 | bdrv_clear_dirty_bitmap(state->bitmap, &state->backup); | |
df9a681d FZ |
2031 | } |
2032 | ||
5c4cf8b2 | 2033 | static void block_dirty_bitmap_restore(BlkActionState *common) |
df9a681d FZ |
2034 | { |
2035 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2036 | common, common); | |
2037 | ||
184dd9c4 | 2038 | if (state->backup) { |
56bd6624 | 2039 | bdrv_restore_dirty_bitmap(state->bitmap, state->backup); |
184dd9c4 | 2040 | } |
df9a681d FZ |
2041 | } |
2042 | ||
5c4cf8b2 | 2043 | static void block_dirty_bitmap_free_backup(BlkActionState *common) |
df9a681d FZ |
2044 | { |
2045 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2046 | common, common); | |
2047 | ||
2048 | hbitmap_free(state->backup); | |
2049 | } | |
2050 | ||
c6490447 VSO |
2051 | static void block_dirty_bitmap_enable_prepare(BlkActionState *common, |
2052 | Error **errp) | |
2053 | { | |
2054 | BlockDirtyBitmap *action; | |
2055 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2056 | common, common); | |
2057 | ||
2058 | if (action_check_completion_mode(common, errp) < 0) { | |
2059 | return; | |
2060 | } | |
2061 | ||
0e2b7f09 | 2062 | action = common->action->u.block_dirty_bitmap_enable.data; |
c6490447 VSO |
2063 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2064 | action->name, | |
2065 | NULL, | |
2066 | errp); | |
2067 | if (!state->bitmap) { | |
2068 | return; | |
2069 | } | |
2070 | ||
3ae96d66 | 2071 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
b053bb55 JS |
2072 | return; |
2073 | } | |
2074 | ||
c6490447 VSO |
2075 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2076 | bdrv_enable_dirty_bitmap(state->bitmap); | |
2077 | } | |
2078 | ||
2079 | static void block_dirty_bitmap_enable_abort(BlkActionState *common) | |
2080 | { | |
2081 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2082 | common, common); | |
2083 | ||
2084 | if (!state->was_enabled) { | |
2085 | bdrv_disable_dirty_bitmap(state->bitmap); | |
2086 | } | |
2087 | } | |
2088 | ||
2089 | static void block_dirty_bitmap_disable_prepare(BlkActionState *common, | |
2090 | Error **errp) | |
2091 | { | |
2092 | BlockDirtyBitmap *action; | |
2093 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2094 | common, common); | |
2095 | ||
2096 | if (action_check_completion_mode(common, errp) < 0) { | |
2097 | return; | |
2098 | } | |
2099 | ||
0e2b7f09 | 2100 | action = common->action->u.block_dirty_bitmap_disable.data; |
c6490447 VSO |
2101 | state->bitmap = block_dirty_bitmap_lookup(action->node, |
2102 | action->name, | |
2103 | NULL, | |
2104 | errp); | |
2105 | if (!state->bitmap) { | |
2106 | return; | |
2107 | } | |
2108 | ||
3ae96d66 | 2109 | if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
b053bb55 JS |
2110 | return; |
2111 | } | |
2112 | ||
c6490447 VSO |
2113 | state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap); |
2114 | bdrv_disable_dirty_bitmap(state->bitmap); | |
2115 | } | |
2116 | ||
2117 | static void block_dirty_bitmap_disable_abort(BlkActionState *common) | |
2118 | { | |
2119 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2120 | common, common); | |
2121 | ||
2122 | if (state->was_enabled) { | |
2123 | bdrv_enable_dirty_bitmap(state->bitmap); | |
2124 | } | |
2125 | } | |
2126 | ||
6fd2e407 VSO |
2127 | static void block_dirty_bitmap_merge_prepare(BlkActionState *common, |
2128 | Error **errp) | |
2129 | { | |
2130 | BlockDirtyBitmapMerge *action; | |
2131 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2132 | common, common); | |
6fd2e407 VSO |
2133 | |
2134 | if (action_check_completion_mode(common, errp) < 0) { | |
2135 | return; | |
2136 | } | |
2137 | ||
0e2b7f09 | 2138 | action = common->action->u.block_dirty_bitmap_merge.data; |
6fd2e407 | 2139 | |
c6996cf9 EB |
2140 | state->bitmap = block_dirty_bitmap_merge(action->node, action->target, |
2141 | action->bitmaps, &state->backup, | |
2142 | errp); | |
6fd2e407 VSO |
2143 | } |
2144 | ||
c4e4b0fa JS |
2145 | static void block_dirty_bitmap_remove_prepare(BlkActionState *common, |
2146 | Error **errp) | |
2147 | { | |
2148 | BlockDirtyBitmap *action; | |
2149 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2150 | common, common); | |
2151 | ||
2152 | if (action_check_completion_mode(common, errp) < 0) { | |
2153 | return; | |
2154 | } | |
2155 | ||
2156 | action = common->action->u.block_dirty_bitmap_remove.data; | |
2157 | ||
c6996cf9 EB |
2158 | state->bitmap = block_dirty_bitmap_remove(action->node, action->name, |
2159 | false, &state->bs, errp); | |
c4e4b0fa JS |
2160 | if (state->bitmap) { |
2161 | bdrv_dirty_bitmap_skip_store(state->bitmap, true); | |
2162 | bdrv_dirty_bitmap_set_busy(state->bitmap, true); | |
2163 | } | |
2164 | } | |
2165 | ||
2166 | static void block_dirty_bitmap_remove_abort(BlkActionState *common) | |
2167 | { | |
2168 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2169 | common, common); | |
2170 | ||
2171 | if (state->bitmap) { | |
2172 | bdrv_dirty_bitmap_skip_store(state->bitmap, false); | |
2173 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
2174 | } | |
2175 | } | |
2176 | ||
2177 | static void block_dirty_bitmap_remove_commit(BlkActionState *common) | |
2178 | { | |
2179 | BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState, | |
2180 | common, common); | |
2181 | ||
2182 | bdrv_dirty_bitmap_set_busy(state->bitmap, false); | |
5deb6cbd | 2183 | bdrv_release_dirty_bitmap(state->bitmap); |
c4e4b0fa JS |
2184 | } |
2185 | ||
50f43f0f | 2186 | static void abort_prepare(BlkActionState *common, Error **errp) |
78b18b78 SH |
2187 | { |
2188 | error_setg(errp, "Transaction aborted using Abort action"); | |
2189 | } | |
2190 | ||
50f43f0f | 2191 | static void abort_commit(BlkActionState *common) |
78b18b78 | 2192 | { |
dfc6f865 | 2193 | g_assert_not_reached(); /* this action never succeeds */ |
78b18b78 SH |
2194 | } |
2195 | ||
50f43f0f | 2196 | static const BlkActionOps actions[] = { |
43de7e2d AG |
2197 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = { |
2198 | .instance_size = sizeof(ExternalSnapshotState), | |
2199 | .prepare = external_snapshot_prepare, | |
2200 | .commit = external_snapshot_commit, | |
2201 | .abort = external_snapshot_abort, | |
4ad6f3db | 2202 | .clean = external_snapshot_clean, |
43de7e2d | 2203 | }, |
c8a83e85 | 2204 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
ba5d6ab6 | 2205 | .instance_size = sizeof(ExternalSnapshotState), |
ba0c86a3 WX |
2206 | .prepare = external_snapshot_prepare, |
2207 | .commit = external_snapshot_commit, | |
2208 | .abort = external_snapshot_abort, | |
da763e83 | 2209 | .clean = external_snapshot_clean, |
ba0c86a3 | 2210 | }, |
3037f364 SH |
2211 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
2212 | .instance_size = sizeof(DriveBackupState), | |
2213 | .prepare = drive_backup_prepare, | |
111049a4 | 2214 | .commit = drive_backup_commit, |
3037f364 | 2215 | .abort = drive_backup_abort, |
5d6e96ef | 2216 | .clean = drive_backup_clean, |
3037f364 | 2217 | }, |
bd8baecd FZ |
2218 | [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = { |
2219 | .instance_size = sizeof(BlockdevBackupState), | |
2220 | .prepare = blockdev_backup_prepare, | |
111049a4 | 2221 | .commit = blockdev_backup_commit, |
bd8baecd FZ |
2222 | .abort = blockdev_backup_abort, |
2223 | .clean = blockdev_backup_clean, | |
2224 | }, | |
78b18b78 | 2225 | [TRANSACTION_ACTION_KIND_ABORT] = { |
50f43f0f | 2226 | .instance_size = sizeof(BlkActionState), |
78b18b78 SH |
2227 | .prepare = abort_prepare, |
2228 | .commit = abort_commit, | |
2229 | }, | |
bbe86010 WX |
2230 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
2231 | .instance_size = sizeof(InternalSnapshotState), | |
2232 | .prepare = internal_snapshot_prepare, | |
2233 | .abort = internal_snapshot_abort, | |
5d6e96ef | 2234 | .clean = internal_snapshot_clean, |
bbe86010 | 2235 | }, |
df9a681d FZ |
2236 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = { |
2237 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2238 | .prepare = block_dirty_bitmap_add_prepare, | |
2239 | .abort = block_dirty_bitmap_add_abort, | |
2240 | }, | |
2241 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = { | |
2242 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2243 | .prepare = block_dirty_bitmap_clear_prepare, | |
5c4cf8b2 VSO |
2244 | .commit = block_dirty_bitmap_free_backup, |
2245 | .abort = block_dirty_bitmap_restore, | |
c6490447 | 2246 | }, |
0e2b7f09 | 2247 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = { |
c6490447 VSO |
2248 | .instance_size = sizeof(BlockDirtyBitmapState), |
2249 | .prepare = block_dirty_bitmap_enable_prepare, | |
2250 | .abort = block_dirty_bitmap_enable_abort, | |
2251 | }, | |
0e2b7f09 | 2252 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = { |
c6490447 VSO |
2253 | .instance_size = sizeof(BlockDirtyBitmapState), |
2254 | .prepare = block_dirty_bitmap_disable_prepare, | |
2255 | .abort = block_dirty_bitmap_disable_abort, | |
66da04dd | 2256 | }, |
0e2b7f09 | 2257 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = { |
6fd2e407 VSO |
2258 | .instance_size = sizeof(BlockDirtyBitmapState), |
2259 | .prepare = block_dirty_bitmap_merge_prepare, | |
2260 | .commit = block_dirty_bitmap_free_backup, | |
2261 | .abort = block_dirty_bitmap_restore, | |
2262 | }, | |
c4e4b0fa JS |
2263 | [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_REMOVE] = { |
2264 | .instance_size = sizeof(BlockDirtyBitmapState), | |
2265 | .prepare = block_dirty_bitmap_remove_prepare, | |
2266 | .commit = block_dirty_bitmap_remove_commit, | |
2267 | .abort = block_dirty_bitmap_remove_abort, | |
2268 | }, | |
66da04dd JS |
2269 | /* Where are transactions for MIRROR, COMMIT and STREAM? |
2270 | * Although these blockjobs use transaction callbacks like the backup job, | |
2271 | * these jobs do not necessarily adhere to transaction semantics. | |
2272 | * These jobs may not fully undo all of their actions on abort, nor do they | |
2273 | * necessarily work in transactions with more than one job in them. | |
2274 | */ | |
ba0c86a3 WX |
2275 | }; |
2276 | ||
94d16a64 JS |
2277 | /** |
2278 | * Allocate a TransactionProperties structure if necessary, and fill | |
2279 | * that structure with desired defaults if they are unset. | |
2280 | */ | |
2281 | static TransactionProperties *get_transaction_properties( | |
2282 | TransactionProperties *props) | |
2283 | { | |
2284 | if (!props) { | |
2285 | props = g_new0(TransactionProperties, 1); | |
2286 | } | |
2287 | ||
2288 | if (!props->has_completion_mode) { | |
2289 | props->has_completion_mode = true; | |
2290 | props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL; | |
2291 | } | |
2292 | ||
2293 | return props; | |
2294 | } | |
2295 | ||
8802d1fd | 2296 | /* |
b756b9ce SH |
2297 | * 'Atomic' group operations. The operations are performed as a set, and if |
2298 | * any fail then we roll back all operations in the group. | |
ebc2752b EGE |
2299 | * |
2300 | * Always run under BQL. | |
8802d1fd | 2301 | */ |
94d16a64 | 2302 | void qmp_transaction(TransactionActionList *dev_list, |
94d16a64 JS |
2303 | struct TransactionProperties *props, |
2304 | Error **errp) | |
8802d1fd | 2305 | { |
c8a83e85 | 2306 | TransactionActionList *dev_entry = dev_list; |
238e9202 | 2307 | bool has_props = !!props; |
62c9e416 | 2308 | JobTxn *block_job_txn = NULL; |
50f43f0f | 2309 | BlkActionState *state, *next; |
43e17041 | 2310 | Error *local_err = NULL; |
8802d1fd | 2311 | |
b4ad82aa EGE |
2312 | GLOBAL_STATE_CODE(); |
2313 | ||
f4de0f8c JS |
2314 | QTAILQ_HEAD(, BlkActionState) snap_bdrv_states; |
2315 | QTAILQ_INIT(&snap_bdrv_states); | |
8802d1fd | 2316 | |
94d16a64 | 2317 | /* Does this transaction get canceled as a group on failure? |
62c9e416 | 2318 | * If not, we don't really need to make a JobTxn. |
94d16a64 JS |
2319 | */ |
2320 | props = get_transaction_properties(props); | |
2321 | if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) { | |
7eaa8fb5 | 2322 | block_job_txn = job_txn_new(); |
94d16a64 JS |
2323 | } |
2324 | ||
b756b9ce | 2325 | /* drain all i/o before any operations */ |
8802d1fd JC |
2326 | bdrv_drain_all(); |
2327 | ||
b756b9ce | 2328 | /* We don't do anything in this loop that commits us to the operations */ |
8802d1fd | 2329 | while (NULL != dev_entry) { |
c8a83e85 | 2330 | TransactionAction *dev_info = NULL; |
50f43f0f | 2331 | const BlkActionOps *ops; |
52e7c241 | 2332 | |
8802d1fd JC |
2333 | dev_info = dev_entry->value; |
2334 | dev_entry = dev_entry->next; | |
2335 | ||
6a8f9661 | 2336 | assert(dev_info->type < ARRAY_SIZE(actions)); |
ba0c86a3 | 2337 | |
6a8f9661 | 2338 | ops = &actions[dev_info->type]; |
aa3fe714 HR |
2339 | assert(ops->instance_size > 0); |
2340 | ||
ba5d6ab6 SH |
2341 | state = g_malloc0(ops->instance_size); |
2342 | state->ops = ops; | |
2343 | state->action = dev_info; | |
94d16a64 JS |
2344 | state->block_job_txn = block_job_txn; |
2345 | state->txn_props = props; | |
f4de0f8c | 2346 | QTAILQ_INSERT_TAIL(&snap_bdrv_states, state, entry); |
8802d1fd | 2347 | |
ba5d6ab6 | 2348 | state->ops->prepare(state, &local_err); |
84d18f06 | 2349 | if (local_err) { |
ba0c86a3 WX |
2350 | error_propagate(errp, local_err); |
2351 | goto delete_and_fail; | |
8802d1fd | 2352 | } |
8802d1fd JC |
2353 | } |
2354 | ||
f4de0f8c | 2355 | QTAILQ_FOREACH(state, &snap_bdrv_states, entry) { |
f9ea81e8 SH |
2356 | if (state->ops->commit) { |
2357 | state->ops->commit(state); | |
2358 | } | |
8802d1fd JC |
2359 | } |
2360 | ||
2361 | /* success */ | |
2362 | goto exit; | |
2363 | ||
2364 | delete_and_fail: | |
b756b9ce | 2365 | /* failure, and it is all-or-none; roll back all operations */ |
f4de0f8c | 2366 | QTAILQ_FOREACH_REVERSE(state, &snap_bdrv_states, entry) { |
ba5d6ab6 SH |
2367 | if (state->ops->abort) { |
2368 | state->ops->abort(state); | |
ba0c86a3 | 2369 | } |
8802d1fd JC |
2370 | } |
2371 | exit: | |
f4de0f8c | 2372 | QTAILQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
ba5d6ab6 SH |
2373 | if (state->ops->clean) { |
2374 | state->ops->clean(state); | |
ba0c86a3 | 2375 | } |
ba5d6ab6 | 2376 | g_free(state); |
8802d1fd | 2377 | } |
94d16a64 JS |
2378 | if (!has_props) { |
2379 | qapi_free_TransactionProperties(props); | |
2380 | } | |
7eaa8fb5 | 2381 | job_txn_unref(block_job_txn); |
8802d1fd JC |
2382 | } |
2383 | ||
a3b52535 VSO |
2384 | BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node, |
2385 | const char *name, | |
2386 | Error **errp) | |
2387 | { | |
2388 | BdrvDirtyBitmap *bitmap; | |
2389 | BlockDriverState *bs; | |
2390 | BlockDirtyBitmapSha256 *ret = NULL; | |
2391 | char *sha256; | |
2392 | ||
2393 | bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp); | |
2394 | if (!bitmap || !bs) { | |
2395 | return NULL; | |
2396 | } | |
2397 | ||
2398 | sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp); | |
2399 | if (sha256 == NULL) { | |
2400 | return NULL; | |
2401 | } | |
2402 | ||
2403 | ret = g_new(BlockDirtyBitmapSha256, 1); | |
2404 | ret->sha256 = sha256; | |
2405 | ||
2406 | return ret; | |
2407 | } | |
2408 | ||
54fde4ff | 2409 | void coroutine_fn qmp_block_resize(const char *device, const char *node_name, |
eb94b81a | 2410 | int64_t size, Error **errp) |
6d4a2b3a | 2411 | { |
3b1dbd11 | 2412 | Error *local_err = NULL; |
d9dbf25f | 2413 | BlockBackend *blk; |
6d4a2b3a | 2414 | BlockDriverState *bs; |
eb94b81a | 2415 | AioContext *old_ctx; |
6d4a2b3a | 2416 | |
54fde4ff | 2417 | bs = bdrv_lookup_bs(device, node_name, &local_err); |
84d18f06 | 2418 | if (local_err) { |
3b1dbd11 BC |
2419 | error_propagate(errp, local_err); |
2420 | return; | |
2421 | } | |
2422 | ||
6d4a2b3a | 2423 | if (size < 0) { |
c6bd8c70 | 2424 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
d9dbf25f | 2425 | return; |
6d4a2b3a CH |
2426 | } |
2427 | ||
9c75e168 | 2428 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) { |
c6bd8c70 | 2429 | error_setg(errp, QERR_DEVICE_IN_USE, device); |
d9dbf25f | 2430 | return; |
9c75e168 JC |
2431 | } |
2432 | ||
a3aeeab5 EB |
2433 | blk = blk_new_with_bs(bs, BLK_PERM_RESIZE, BLK_PERM_ALL, errp); |
2434 | if (!blk) { | |
d9dbf25f | 2435 | return; |
d7086422 | 2436 | } |
7dad9ee6 | 2437 | |
8089eab2 | 2438 | bdrv_co_lock(bs); |
698bdfa0 | 2439 | bdrv_drained_begin(bs); |
8089eab2 KW |
2440 | bdrv_co_unlock(bs); |
2441 | ||
eb94b81a | 2442 | old_ctx = bdrv_co_enter(bs); |
247cf5c0 | 2443 | blk_co_truncate(blk, size, false, PREALLOC_MODE_OFF, 0, errp); |
eb94b81a | 2444 | bdrv_co_leave(bs, old_ctx); |
927e0e76 | 2445 | |
eb94b81a | 2446 | bdrv_co_lock(bs); |
8089eab2 | 2447 | bdrv_drained_end(bs); |
7dad9ee6 | 2448 | blk_unref(blk); |
eb94b81a | 2449 | bdrv_co_unlock(bs); |
6d4a2b3a | 2450 | } |
12bd451f | 2451 | |
54fde4ff MA |
2452 | void qmp_block_stream(const char *job_id, const char *device, |
2453 | const char *base, | |
2454 | const char *base_node, | |
2455 | const char *backing_file, | |
2456 | const char *bottom, | |
13d8cc51 | 2457 | bool has_speed, int64_t speed, |
1d809098 | 2458 | bool has_on_error, BlockdevOnError on_error, |
54fde4ff | 2459 | const char *filter_node_name, |
241ca1ab JS |
2460 | bool has_auto_finalize, bool auto_finalize, |
2461 | bool has_auto_dismiss, bool auto_dismiss, | |
1d809098 | 2462 | Error **errp) |
12bd451f | 2463 | { |
7f4a396d | 2464 | BlockDriverState *bs, *iter, *iter_end; |
c8c3080f | 2465 | BlockDriverState *base_bs = NULL; |
7f4a396d | 2466 | BlockDriverState *bottom_bs = NULL; |
f3e69beb | 2467 | AioContext *aio_context; |
fd7f8c65 | 2468 | Error *local_err = NULL; |
cf6320df | 2469 | int job_flags = JOB_DEFAULT; |
12bd451f | 2470 | |
54fde4ff | 2471 | if (base && base_node) { |
7f4a396d VSO |
2472 | error_setg(errp, "'base' and 'base-node' cannot be specified " |
2473 | "at the same time"); | |
2474 | return; | |
2475 | } | |
2476 | ||
54fde4ff | 2477 | if (base && bottom) { |
7f4a396d VSO |
2478 | error_setg(errp, "'base' and 'bottom' cannot be specified " |
2479 | "at the same time"); | |
2480 | return; | |
2481 | } | |
2482 | ||
54fde4ff | 2483 | if (bottom && base_node) { |
7f4a396d VSO |
2484 | error_setg(errp, "'bottom' and 'base-node' cannot be specified " |
2485 | "at the same time"); | |
2486 | return; | |
2487 | } | |
2488 | ||
1d809098 PB |
2489 | if (!has_on_error) { |
2490 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2491 | } | |
2492 | ||
554b6147 | 2493 | bs = bdrv_lookup_bs(device, device, errp); |
b6c1bae5 | 2494 | if (!bs) { |
12bd451f SH |
2495 | return; |
2496 | } | |
2497 | ||
b6c1bae5 | 2498 | aio_context = bdrv_get_aio_context(bs); |
f3e69beb SH |
2499 | aio_context_acquire(aio_context); |
2500 | ||
54fde4ff | 2501 | if (base) { |
c8c3080f MT |
2502 | base_bs = bdrv_find_backing_image(bs, base); |
2503 | if (base_bs == NULL) { | |
b0d7be2a | 2504 | error_setg(errp, "Can't find '%s' in the backing chain", base); |
f3e69beb | 2505 | goto out; |
c8c3080f | 2506 | } |
f3e69beb | 2507 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
12bd451f SH |
2508 | } |
2509 | ||
54fde4ff | 2510 | if (base_node) { |
312fe09c AG |
2511 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); |
2512 | if (!base_bs) { | |
2513 | goto out; | |
2514 | } | |
2515 | if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) { | |
2516 | error_setg(errp, "Node '%s' is not a backing image of '%s'", | |
2517 | base_node, device); | |
2518 | goto out; | |
2519 | } | |
2520 | assert(bdrv_get_aio_context(base_bs) == aio_context); | |
f30c66ba | 2521 | bdrv_refresh_filename(base_bs); |
312fe09c AG |
2522 | } |
2523 | ||
54fde4ff | 2524 | if (bottom) { |
7f4a396d VSO |
2525 | bottom_bs = bdrv_lookup_bs(NULL, bottom, errp); |
2526 | if (!bottom_bs) { | |
2527 | goto out; | |
2528 | } | |
2529 | if (!bottom_bs->drv) { | |
2530 | error_setg(errp, "Node '%s' is not open", bottom); | |
2531 | goto out; | |
2532 | } | |
2533 | if (bottom_bs->drv->is_filter) { | |
2534 | error_setg(errp, "Node '%s' is a filter, use a non-filter node " | |
2535 | "as 'bottom'", bottom); | |
2536 | goto out; | |
2537 | } | |
2538 | if (!bdrv_chain_contains(bs, bottom_bs)) { | |
2539 | error_setg(errp, "Node '%s' is not in a chain starting from '%s'", | |
2540 | bottom, device); | |
2541 | goto out; | |
2542 | } | |
2543 | assert(bdrv_get_aio_context(bottom_bs) == aio_context); | |
2544 | } | |
2545 | ||
2546 | /* | |
2547 | * Check for op blockers in the whole chain between bs and base (or bottom) | |
2548 | */ | |
54fde4ff | 2549 | iter_end = bottom ? bdrv_filter_or_cow_bs(bottom_bs) : base_bs; |
7f4a396d | 2550 | for (iter = bs; iter && iter != iter_end; |
67acfd21 HR |
2551 | iter = bdrv_filter_or_cow_bs(iter)) |
2552 | { | |
554b6147 AG |
2553 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) { |
2554 | goto out; | |
2555 | } | |
2556 | } | |
2557 | ||
13d8cc51 JC |
2558 | /* if we are streaming the entire chain, the result will have no backing |
2559 | * file, and specifying one is therefore an error */ | |
54fde4ff | 2560 | if (!base_bs && backing_file) { |
13d8cc51 JC |
2561 | error_setg(errp, "backing file specified, but streaming the " |
2562 | "entire chain"); | |
f3e69beb | 2563 | goto out; |
13d8cc51 JC |
2564 | } |
2565 | ||
241ca1ab JS |
2566 | if (has_auto_finalize && !auto_finalize) { |
2567 | job_flags |= JOB_MANUAL_FINALIZE; | |
2568 | } | |
2569 | if (has_auto_dismiss && !auto_dismiss) { | |
2570 | job_flags |= JOB_MANUAL_DISMISS; | |
2571 | } | |
2572 | ||
54fde4ff | 2573 | stream_start(job_id, bs, base_bs, backing_file, |
7f4a396d | 2574 | bottom_bs, job_flags, has_speed ? speed : 0, on_error, |
880747a8 | 2575 | filter_node_name, &local_err); |
84d18f06 | 2576 | if (local_err) { |
fd7f8c65 | 2577 | error_propagate(errp, local_err); |
f3e69beb | 2578 | goto out; |
12bd451f SH |
2579 | } |
2580 | ||
b23c580c | 2581 | trace_qmp_block_stream(bs); |
f3e69beb SH |
2582 | |
2583 | out: | |
2584 | aio_context_release(aio_context); | |
12bd451f | 2585 | } |
2d47c6e9 | 2586 | |
54fde4ff MA |
2587 | void qmp_block_commit(const char *job_id, const char *device, |
2588 | const char *base_node, | |
2589 | const char *base, | |
2590 | const char *top_node, | |
2591 | const char *top, | |
2592 | const char *backing_file, | |
ed61fc10 | 2593 | bool has_speed, int64_t speed, |
8faad1c7 | 2594 | bool has_on_error, BlockdevOnError on_error, |
54fde4ff | 2595 | const char *filter_node_name, |
96fbf534 JS |
2596 | bool has_auto_finalize, bool auto_finalize, |
2597 | bool has_auto_dismiss, bool auto_dismiss, | |
ed61fc10 JC |
2598 | Error **errp) |
2599 | { | |
2600 | BlockDriverState *bs; | |
058223a6 | 2601 | BlockDriverState *iter; |
ed61fc10 | 2602 | BlockDriverState *base_bs, *top_bs; |
9e85cd5c | 2603 | AioContext *aio_context; |
ed61fc10 | 2604 | Error *local_err = NULL; |
5360782d | 2605 | int job_flags = JOB_DEFAULT; |
05ea385a | 2606 | uint64_t top_perm, top_shared; |
ed61fc10 | 2607 | |
54504663 HR |
2608 | if (!has_speed) { |
2609 | speed = 0; | |
2610 | } | |
8faad1c7 KW |
2611 | if (!has_on_error) { |
2612 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
2613 | } | |
96fbf534 JS |
2614 | if (has_auto_finalize && !auto_finalize) { |
2615 | job_flags |= JOB_MANUAL_FINALIZE; | |
2616 | } | |
2617 | if (has_auto_dismiss && !auto_dismiss) { | |
2618 | job_flags |= JOB_MANUAL_DISMISS; | |
2619 | } | |
54504663 | 2620 | |
7676e2c5 JC |
2621 | /* Important Note: |
2622 | * libvirt relies on the DeviceNotFound error class in order to probe for | |
2623 | * live commit feature versions; for this to work, we must make sure to | |
2624 | * perform the device lookup before any generic errors that may occur in a | |
2625 | * scenario in which all optional arguments are omitted. */ | |
1d13b167 KW |
2626 | bs = qmp_get_root_bs(device, &local_err); |
2627 | if (!bs) { | |
2628 | bs = bdrv_lookup_bs(device, device, NULL); | |
2629 | if (!bs) { | |
2630 | error_free(local_err); | |
2631 | error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, | |
2632 | "Device '%s' not found", device); | |
2633 | } else { | |
2634 | error_propagate(errp, local_err); | |
2635 | } | |
ed61fc10 | 2636 | return; |
628ff683 FZ |
2637 | } |
2638 | ||
1d13b167 | 2639 | aio_context = bdrv_get_aio_context(bs); |
9e85cd5c SH |
2640 | aio_context_acquire(aio_context); |
2641 | ||
bb00021d | 2642 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) { |
9e85cd5c | 2643 | goto out; |
ed61fc10 | 2644 | } |
ed61fc10 JC |
2645 | |
2646 | /* default top_bs is the active layer */ | |
2647 | top_bs = bs; | |
2648 | ||
54fde4ff | 2649 | if (top_node && top) { |
3c605f40 KW |
2650 | error_setg(errp, "'top-node' and 'top' are mutually exclusive"); |
2651 | goto out; | |
54fde4ff | 2652 | } else if (top_node) { |
3c605f40 KW |
2653 | top_bs = bdrv_lookup_bs(NULL, top_node, errp); |
2654 | if (top_bs == NULL) { | |
2655 | goto out; | |
2656 | } | |
2657 | if (!bdrv_chain_contains(bs, top_bs)) { | |
2658 | error_setg(errp, "'%s' is not in this backing file chain", | |
2659 | top_node); | |
2660 | goto out; | |
2661 | } | |
54fde4ff | 2662 | } else if (top) { |
f30c66ba HR |
2663 | /* This strcmp() is just a shortcut, there is no need to |
2664 | * refresh @bs's filename. If it mismatches, | |
2665 | * bdrv_find_backing_image() will do the refresh and may still | |
2666 | * return @bs. */ | |
ed61fc10 JC |
2667 | if (strcmp(bs->filename, top) != 0) { |
2668 | top_bs = bdrv_find_backing_image(bs, top); | |
2669 | } | |
2670 | } | |
2671 | ||
2672 | if (top_bs == NULL) { | |
2673 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
9e85cd5c | 2674 | goto out; |
ed61fc10 JC |
2675 | } |
2676 | ||
9e85cd5c SH |
2677 | assert(bdrv_get_aio_context(top_bs) == aio_context); |
2678 | ||
54fde4ff | 2679 | if (base_node && base) { |
3c605f40 KW |
2680 | error_setg(errp, "'base-node' and 'base' are mutually exclusive"); |
2681 | goto out; | |
54fde4ff | 2682 | } else if (base_node) { |
3c605f40 KW |
2683 | base_bs = bdrv_lookup_bs(NULL, base_node, errp); |
2684 | if (base_bs == NULL) { | |
2685 | goto out; | |
2686 | } | |
2687 | if (!bdrv_chain_contains(top_bs, base_bs)) { | |
2688 | error_setg(errp, "'%s' is not in this backing file chain", | |
2689 | base_node); | |
2690 | goto out; | |
2691 | } | |
54fde4ff | 2692 | } else if (base) { |
d5208c45 | 2693 | base_bs = bdrv_find_backing_image(top_bs, base); |
b0d7be2a MA |
2694 | if (base_bs == NULL) { |
2695 | error_setg(errp, "Can't find '%s' in the backing chain", base); | |
2696 | goto out; | |
2697 | } | |
d5208c45 JC |
2698 | } else { |
2699 | base_bs = bdrv_find_base(top_bs); | |
b0d7be2a MA |
2700 | if (base_bs == NULL) { |
2701 | error_setg(errp, "There is no backimg image"); | |
2702 | goto out; | |
2703 | } | |
d5208c45 JC |
2704 | } |
2705 | ||
9e85cd5c SH |
2706 | assert(bdrv_get_aio_context(base_bs) == aio_context); |
2707 | ||
9a71b9de HR |
2708 | for (iter = top_bs; iter != bdrv_filter_or_cow_bs(base_bs); |
2709 | iter = bdrv_filter_or_cow_bs(iter)) | |
2710 | { | |
058223a6 AG |
2711 | if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { |
2712 | goto out; | |
2713 | } | |
bb00021d FZ |
2714 | } |
2715 | ||
7676e2c5 JC |
2716 | /* Do not allow attempts to commit an image into itself */ |
2717 | if (top_bs == base_bs) { | |
2718 | error_setg(errp, "cannot commit an image into itself"); | |
9e85cd5c | 2719 | goto out; |
7676e2c5 JC |
2720 | } |
2721 | ||
05ea385a HR |
2722 | /* |
2723 | * Active commit is required if and only if someone has taken a | |
2724 | * WRITE permission on the top node. Historically, we have always | |
2725 | * used active commit for top nodes, so continue that practice | |
2726 | * lest we possibly break clients that rely on this behavior, e.g. | |
2727 | * to later attach this node to a writing parent. | |
2728 | * (Active commit is never really wrong.) | |
2729 | */ | |
2730 | bdrv_get_cumulative_perm(top_bs, &top_perm, &top_shared); | |
2731 | if (top_perm & BLK_PERM_WRITE || | |
2732 | bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) | |
2733 | { | |
54fde4ff | 2734 | if (backing_file) { |
05ea385a HR |
2735 | if (bdrv_skip_filters(top_bs) == bdrv_skip_filters(bs)) { |
2736 | error_setg(errp, "'backing-file' specified," | |
2737 | " but 'top' is the active layer"); | |
2738 | } else { | |
2739 | error_setg(errp, "'backing-file' specified, but 'top' has a " | |
2740 | "writer on it"); | |
2741 | } | |
9e85cd5c | 2742 | goto out; |
54e26900 | 2743 | } |
54fde4ff | 2744 | if (!job_id) { |
05ea385a HR |
2745 | /* |
2746 | * Emulate here what block_job_create() does, because it | |
2747 | * is possible that @bs != @top_bs (the block job should | |
2748 | * be named after @bs, even if @top_bs is the actual | |
2749 | * source) | |
2750 | */ | |
2751 | job_id = bdrv_get_device_name(bs); | |
2752 | } | |
2753 | commit_active_start(job_id, top_bs, base_bs, job_flags, speed, on_error, | |
78bbd910 | 2754 | filter_node_name, NULL, NULL, false, &local_err); |
20a63d2c | 2755 | } else { |
058223a6 AG |
2756 | BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs); |
2757 | if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) { | |
2758 | goto out; | |
2759 | } | |
54fde4ff MA |
2760 | commit_start(job_id, bs, base_bs, top_bs, job_flags, |
2761 | speed, on_error, backing_file, | |
0db832f4 | 2762 | filter_node_name, &local_err); |
20a63d2c | 2763 | } |
ed61fc10 JC |
2764 | if (local_err != NULL) { |
2765 | error_propagate(errp, local_err); | |
9e85cd5c | 2766 | goto out; |
ed61fc10 | 2767 | } |
9e85cd5c SH |
2768 | |
2769 | out: | |
2770 | aio_context_release(aio_context); | |
ed61fc10 JC |
2771 | } |
2772 | ||
7b0b870b JS |
2773 | /* Common QMP interface for drive-backup and blockdev-backup */ |
2774 | static BlockJob *do_backup_common(BackupCommon *backup, | |
2775 | BlockDriverState *bs, | |
2776 | BlockDriverState *target_bs, | |
2777 | AioContext *aio_context, | |
2778 | JobTxn *txn, Error **errp) | |
99a9addf | 2779 | { |
111049a4 | 2780 | BlockJob *job = NULL; |
d58d8453 | 2781 | BdrvDirtyBitmap *bmap = NULL; |
6a30f663 | 2782 | BackupPerf perf = { .max_workers = 64 }; |
7b0b870b | 2783 | int job_flags = JOB_DEFAULT; |
99a9addf | 2784 | |
81206a89 PB |
2785 | if (!backup->has_speed) { |
2786 | backup->speed = 0; | |
99a9addf | 2787 | } |
81206a89 PB |
2788 | if (!backup->has_on_source_error) { |
2789 | backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
99a9addf | 2790 | } |
81206a89 PB |
2791 | if (!backup->has_on_target_error) { |
2792 | backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
99a9addf | 2793 | } |
b40dacdc JS |
2794 | if (!backup->has_auto_finalize) { |
2795 | backup->auto_finalize = true; | |
2796 | } | |
2797 | if (!backup->has_auto_dismiss) { | |
2798 | backup->auto_dismiss = true; | |
2799 | } | |
13b9414b PB |
2800 | if (!backup->has_compress) { |
2801 | backup->compress = false; | |
2802 | } | |
99a9addf | 2803 | |
86c6a3b6 VSO |
2804 | if (backup->x_perf) { |
2805 | if (backup->x_perf->has_use_copy_range) { | |
2806 | perf.use_copy_range = backup->x_perf->use_copy_range; | |
2807 | } | |
2c59fd83 VSO |
2808 | if (backup->x_perf->has_max_workers) { |
2809 | perf.max_workers = backup->x_perf->max_workers; | |
2810 | } | |
2811 | if (backup->x_perf->has_max_chunk) { | |
2812 | perf.max_chunk = backup->x_perf->max_chunk; | |
2813 | } | |
86c6a3b6 VSO |
2814 | } |
2815 | ||
a6c9365a JS |
2816 | if ((backup->sync == MIRROR_SYNC_MODE_BITMAP) || |
2817 | (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL)) { | |
2818 | /* done before desugaring 'incremental' to print the right message */ | |
54fde4ff | 2819 | if (!backup->bitmap) { |
a6c9365a JS |
2820 | error_setg(errp, "must provide a valid bitmap name for " |
2821 | "'%s' sync mode", MirrorSyncMode_str(backup->sync)); | |
2822 | return NULL; | |
2823 | } | |
2824 | } | |
2825 | ||
c8b56501 JS |
2826 | if (backup->sync == MIRROR_SYNC_MODE_INCREMENTAL) { |
2827 | if (backup->has_bitmap_mode && | |
2828 | backup->bitmap_mode != BITMAP_SYNC_MODE_ON_SUCCESS) { | |
2829 | error_setg(errp, "Bitmap sync mode must be '%s' " | |
2830 | "when using sync mode '%s'", | |
2831 | BitmapSyncMode_str(BITMAP_SYNC_MODE_ON_SUCCESS), | |
2832 | MirrorSyncMode_str(backup->sync)); | |
2833 | return NULL; | |
2834 | } | |
2835 | backup->has_bitmap_mode = true; | |
2836 | backup->sync = MIRROR_SYNC_MODE_BITMAP; | |
2837 | backup->bitmap_mode = BITMAP_SYNC_MODE_ON_SUCCESS; | |
2838 | } | |
2839 | ||
54fde4ff | 2840 | if (backup->bitmap) { |
7b0b870b JS |
2841 | bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap); |
2842 | if (!bmap) { | |
2843 | error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap); | |
2844 | return NULL; | |
2845 | } | |
c8b56501 JS |
2846 | if (!backup->has_bitmap_mode) { |
2847 | error_setg(errp, "Bitmap sync mode must be given " | |
2848 | "when providing a bitmap"); | |
2849 | return NULL; | |
2850 | } | |
b30ffbef | 2851 | if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_ALLOW_RO, errp)) { |
7b0b870b JS |
2852 | return NULL; |
2853 | } | |
1a2b8b40 JS |
2854 | |
2855 | /* This does not produce a useful bitmap artifact: */ | |
2856 | if (backup->sync == MIRROR_SYNC_MODE_NONE) { | |
2857 | error_setg(errp, "sync mode '%s' does not produce meaningful bitmap" | |
2858 | " outputs", MirrorSyncMode_str(backup->sync)); | |
2859 | return NULL; | |
2860 | } | |
2861 | ||
2862 | /* If the bitmap isn't used for input or output, this is useless: */ | |
2863 | if (backup->bitmap_mode == BITMAP_SYNC_MODE_NEVER && | |
2864 | backup->sync != MIRROR_SYNC_MODE_BITMAP) { | |
2865 | error_setg(errp, "Bitmap sync mode '%s' has no meaningful effect" | |
2866 | " when combined with sync mode '%s'", | |
2867 | BitmapSyncMode_str(backup->bitmap_mode), | |
2868 | MirrorSyncMode_str(backup->sync)); | |
2869 | return NULL; | |
2870 | } | |
2871 | } | |
2872 | ||
54fde4ff | 2873 | if (!backup->bitmap && backup->has_bitmap_mode) { |
1a2b8b40 JS |
2874 | error_setg(errp, "Cannot specify bitmap sync mode without a bitmap"); |
2875 | return NULL; | |
7b0b870b JS |
2876 | } |
2877 | ||
2878 | if (!backup->auto_finalize) { | |
2879 | job_flags |= JOB_MANUAL_FINALIZE; | |
2880 | } | |
2881 | if (!backup->auto_dismiss) { | |
2882 | job_flags |= JOB_MANUAL_DISMISS; | |
2883 | } | |
2884 | ||
2885 | job = backup_job_create(backup->job_id, bs, target_bs, backup->speed, | |
c8b56501 JS |
2886 | backup->sync, bmap, backup->bitmap_mode, |
2887 | backup->compress, | |
00e30f05 | 2888 | backup->filter_node_name, |
86c6a3b6 | 2889 | &perf, |
c8b56501 JS |
2890 | backup->on_source_error, |
2891 | backup->on_target_error, | |
7b0b870b JS |
2892 | job_flags, NULL, NULL, txn, errp); |
2893 | return job; | |
2894 | } | |
2895 | ||
2288ccfa | 2896 | void qmp_drive_backup(DriveBackup *backup, Error **errp) |
78f51fde | 2897 | { |
2288ccfa SL |
2898 | TransactionAction action = { |
2899 | .type = TRANSACTION_ACTION_KIND_DRIVE_BACKUP, | |
2900 | .u.drive_backup.data = backup, | |
2901 | }; | |
2902 | blockdev_do_action(&action, errp); | |
78f51fde JS |
2903 | } |
2904 | ||
facda544 PK |
2905 | BlockDeviceInfoList *qmp_query_named_block_nodes(bool has_flat, |
2906 | bool flat, | |
2907 | Error **errp) | |
c13163fb | 2908 | { |
facda544 PK |
2909 | bool return_flat = has_flat && flat; |
2910 | ||
2911 | return bdrv_named_nodes_list(return_flat, errp); | |
c13163fb BC |
2912 | } |
2913 | ||
5d3b4e99 VSO |
2914 | XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp) |
2915 | { | |
2916 | return bdrv_get_xdbg_block_graph(errp); | |
2917 | } | |
2918 | ||
5b7bfe51 | 2919 | void qmp_blockdev_backup(BlockdevBackup *backup, Error **errp) |
c29c1dd3 | 2920 | { |
5b7bfe51 SL |
2921 | TransactionAction action = { |
2922 | .type = TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP, | |
2923 | .u.blockdev_backup.data = backup, | |
2924 | }; | |
2925 | blockdev_do_action(&action, errp); | |
78f51fde JS |
2926 | } |
2927 | ||
4193cdd7 FZ |
2928 | /* Parameter check and block job starting for drive mirroring. |
2929 | * Caller should hold @device and @target's aio context (must be the same). | |
2930 | **/ | |
71aa9867 | 2931 | static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs, |
4193cdd7 | 2932 | BlockDriverState *target, |
54fde4ff | 2933 | const char *replaces, |
4193cdd7 | 2934 | enum MirrorSyncMode sync, |
274fccee | 2935 | BlockMirrorBackingMode backing_mode, |
cdf3bc93 | 2936 | bool zero_target, |
4193cdd7 FZ |
2937 | bool has_speed, int64_t speed, |
2938 | bool has_granularity, uint32_t granularity, | |
2939 | bool has_buf_size, int64_t buf_size, | |
2940 | bool has_on_source_error, | |
2941 | BlockdevOnError on_source_error, | |
2942 | bool has_on_target_error, | |
2943 | BlockdevOnError on_target_error, | |
2944 | bool has_unmap, bool unmap, | |
6cdbceb1 | 2945 | const char *filter_node_name, |
481debaa | 2946 | bool has_copy_mode, MirrorCopyMode copy_mode, |
a6b58ade JS |
2947 | bool has_auto_finalize, bool auto_finalize, |
2948 | bool has_auto_dismiss, bool auto_dismiss, | |
4193cdd7 | 2949 | Error **errp) |
d9b902db | 2950 | { |
3f072a7f | 2951 | BlockDriverState *unfiltered_bs; |
a1999b33 | 2952 | int job_flags = JOB_DEFAULT; |
d9b902db PB |
2953 | |
2954 | if (!has_speed) { | |
2955 | speed = 0; | |
2956 | } | |
b952b558 PB |
2957 | if (!has_on_source_error) { |
2958 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2959 | } | |
2960 | if (!has_on_target_error) { | |
2961 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2962 | } | |
eee13dfe PB |
2963 | if (!has_granularity) { |
2964 | granularity = 0; | |
2965 | } | |
08e4ed6c | 2966 | if (!has_buf_size) { |
48ac0a4d | 2967 | buf_size = 0; |
08e4ed6c | 2968 | } |
0fc9f8ea FZ |
2969 | if (!has_unmap) { |
2970 | unmap = true; | |
2971 | } | |
481debaa HR |
2972 | if (!has_copy_mode) { |
2973 | copy_mode = MIRROR_COPY_MODE_BACKGROUND; | |
2974 | } | |
a6b58ade JS |
2975 | if (has_auto_finalize && !auto_finalize) { |
2976 | job_flags |= JOB_MANUAL_FINALIZE; | |
2977 | } | |
2978 | if (has_auto_dismiss && !auto_dismiss) { | |
2979 | job_flags |= JOB_MANUAL_DISMISS; | |
2980 | } | |
08e4ed6c | 2981 | |
eee13dfe | 2982 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
c6bd8c70 MA |
2983 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", |
2984 | "a value in range [512B, 64MB]"); | |
eee13dfe PB |
2985 | return; |
2986 | } | |
2987 | if (granularity & (granularity - 1)) { | |
c6bd8c70 | 2988 | error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", |
6cc0667d | 2989 | "a power of 2"); |
eee13dfe PB |
2990 | return; |
2991 | } | |
d9b902db | 2992 | |
4193cdd7 FZ |
2993 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { |
2994 | return; | |
2995 | } | |
e40e5027 FZ |
2996 | if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) { |
2997 | return; | |
2998 | } | |
4193cdd7 | 2999 | |
3f072a7f | 3000 | if (!bdrv_backing_chain_next(bs) && sync == MIRROR_SYNC_MODE_TOP) { |
4193cdd7 FZ |
3001 | sync = MIRROR_SYNC_MODE_FULL; |
3002 | } | |
3003 | ||
54fde4ff | 3004 | if (!replaces) { |
3f072a7f HR |
3005 | /* We want to mirror from @bs, but keep implicit filters on top */ |
3006 | unfiltered_bs = bdrv_skip_implicit_filters(bs); | |
3007 | if (unfiltered_bs != bs) { | |
3008 | replaces = unfiltered_bs->node_name; | |
3f072a7f HR |
3009 | } |
3010 | } | |
3011 | ||
54fde4ff | 3012 | if (replaces) { |
74ce9e46 HR |
3013 | BlockDriverState *to_replace_bs; |
3014 | AioContext *replace_aio_context; | |
3015 | int64_t bs_size, replace_size; | |
3016 | ||
3017 | bs_size = bdrv_getlength(bs); | |
3018 | if (bs_size < 0) { | |
3019 | error_setg_errno(errp, -bs_size, "Failed to query device's size"); | |
3020 | return; | |
3021 | } | |
3022 | ||
3023 | to_replace_bs = check_to_replace_node(bs, replaces, errp); | |
3024 | if (!to_replace_bs) { | |
3025 | return; | |
3026 | } | |
3027 | ||
3028 | replace_aio_context = bdrv_get_aio_context(to_replace_bs); | |
3029 | aio_context_acquire(replace_aio_context); | |
3030 | replace_size = bdrv_getlength(to_replace_bs); | |
3031 | aio_context_release(replace_aio_context); | |
3032 | ||
3033 | if (replace_size < 0) { | |
3034 | error_setg_errno(errp, -replace_size, | |
3035 | "Failed to query the replacement node's size"); | |
3036 | return; | |
3037 | } | |
3038 | if (bs_size != replace_size) { | |
3039 | error_setg(errp, "cannot replace image with a mirror image of " | |
3040 | "different size"); | |
3041 | return; | |
3042 | } | |
3043 | } | |
3044 | ||
4193cdd7 FZ |
3045 | /* pass the node name to replace to mirror start since it's loose coupling |
3046 | * and will allow to check whether the node still exist at mirror completion | |
3047 | */ | |
71aa9867 | 3048 | mirror_start(job_id, bs, target, |
54fde4ff | 3049 | replaces, job_flags, |
cdf3bc93 | 3050 | speed, granularity, buf_size, sync, backing_mode, zero_target, |
6cdbceb1 | 3051 | on_source_error, on_target_error, unmap, filter_node_name, |
481debaa | 3052 | copy_mode, errp); |
4193cdd7 FZ |
3053 | } |
3054 | ||
faecd40a | 3055 | void qmp_drive_mirror(DriveMirror *arg, Error **errp) |
4193cdd7 FZ |
3056 | { |
3057 | BlockDriverState *bs; | |
3f072a7f | 3058 | BlockDriverState *target_backing_bs, *target_bs; |
4193cdd7 | 3059 | AioContext *aio_context; |
3ea67e08 | 3060 | AioContext *old_context; |
274fccee | 3061 | BlockMirrorBackingMode backing_mode; |
4193cdd7 FZ |
3062 | Error *local_err = NULL; |
3063 | QDict *options = NULL; | |
3064 | int flags; | |
3065 | int64_t size; | |
faecd40a | 3066 | const char *format = arg->format; |
cdf3bc93 | 3067 | bool zero_target; |
8ed7d42f | 3068 | int ret; |
4193cdd7 | 3069 | |
0524e93a KW |
3070 | bs = qmp_get_root_bs(arg->device, errp); |
3071 | if (!bs) { | |
d9b902db PB |
3072 | return; |
3073 | } | |
3074 | ||
cb2af917 PB |
3075 | /* Early check to avoid creating target */ |
3076 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) { | |
3077 | return; | |
3078 | } | |
3079 | ||
0524e93a | 3080 | aio_context = bdrv_get_aio_context(bs); |
5a7e7a0b SH |
3081 | aio_context_acquire(aio_context); |
3082 | ||
faecd40a EB |
3083 | if (!arg->has_mode) { |
3084 | arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
4193cdd7 | 3085 | } |
d9b902db | 3086 | |
54fde4ff | 3087 | if (!arg->format) { |
faecd40a EB |
3088 | format = (arg->mode == NEW_IMAGE_MODE_EXISTING |
3089 | ? NULL : bs->drv->format_name); | |
d9b902db | 3090 | } |
d9b902db | 3091 | |
61de4c68 | 3092 | flags = bs->open_flags | BDRV_O_RDWR; |
3f072a7f HR |
3093 | target_backing_bs = bdrv_cow_bs(bdrv_skip_filters(bs)); |
3094 | if (!target_backing_bs && arg->sync == MIRROR_SYNC_MODE_TOP) { | |
faecd40a | 3095 | arg->sync = MIRROR_SYNC_MODE_FULL; |
d9b902db | 3096 | } |
faecd40a | 3097 | if (arg->sync == MIRROR_SYNC_MODE_NONE) { |
3f072a7f | 3098 | target_backing_bs = bs; |
117e0c82 | 3099 | } |
d9b902db | 3100 | |
ac3c5d83 SH |
3101 | size = bdrv_getlength(bs); |
3102 | if (size < 0) { | |
3103 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
5a7e7a0b | 3104 | goto out; |
ac3c5d83 SH |
3105 | } |
3106 | ||
54fde4ff MA |
3107 | if (arg->replaces) { |
3108 | if (!arg->node_name) { | |
09158f00 BC |
3109 | error_setg(errp, "a node-name must be provided when replacing a" |
3110 | " named node of the graph"); | |
5a7e7a0b | 3111 | goto out; |
09158f00 | 3112 | } |
09158f00 BC |
3113 | } |
3114 | ||
faecd40a | 3115 | if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) { |
274fccee HR |
3116 | backing_mode = MIRROR_SOURCE_BACKING_CHAIN; |
3117 | } else { | |
3118 | backing_mode = MIRROR_OPEN_BACKING_CHAIN; | |
3119 | } | |
3120 | ||
2a32c6e8 JS |
3121 | /* Don't open backing image in create() */ |
3122 | flags |= BDRV_O_NO_BACKING; | |
3123 | ||
3f072a7f | 3124 | if ((arg->sync == MIRROR_SYNC_MODE_FULL || !target_backing_bs) |
faecd40a | 3125 | && arg->mode != NEW_IMAGE_MODE_EXISTING) |
14526864 | 3126 | { |
d9b902db | 3127 | /* create new image w/o backing file */ |
e6641719 | 3128 | assert(format); |
faecd40a | 3129 | bdrv_img_create(arg->target, format, |
9217283d | 3130 | NULL, NULL, NULL, size, flags, false, &local_err); |
d9b902db | 3131 | } else { |
3f072a7f HR |
3132 | /* Implicit filters should not appear in the filename */ |
3133 | BlockDriverState *explicit_backing = | |
3134 | bdrv_skip_implicit_filters(target_backing_bs); | |
3135 | ||
faecd40a | 3136 | switch (arg->mode) { |
d9b902db | 3137 | case NEW_IMAGE_MODE_EXISTING: |
d9b902db PB |
3138 | break; |
3139 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
3140 | /* create new image with backing file */ | |
3f072a7f | 3141 | bdrv_refresh_filename(explicit_backing); |
faecd40a | 3142 | bdrv_img_create(arg->target, format, |
3f072a7f HR |
3143 | explicit_backing->filename, |
3144 | explicit_backing->drv->format_name, | |
9217283d | 3145 | NULL, size, flags, false, &local_err); |
d9b902db PB |
3146 | break; |
3147 | default: | |
3148 | abort(); | |
3149 | } | |
3150 | } | |
3151 | ||
84d18f06 | 3152 | if (local_err) { |
cf8f2426 | 3153 | error_propagate(errp, local_err); |
5a7e7a0b | 3154 | goto out; |
d9b902db PB |
3155 | } |
3156 | ||
e6641719 | 3157 | options = qdict_new(); |
54fde4ff | 3158 | if (arg->node_name) { |
46f5ac20 | 3159 | qdict_put_str(options, "node-name", arg->node_name); |
4c828dc6 | 3160 | } |
e6641719 | 3161 | if (format) { |
46f5ac20 | 3162 | qdict_put_str(options, "driver", format); |
e6641719 | 3163 | } |
4c828dc6 | 3164 | |
b812f671 PB |
3165 | /* Mirroring takes care of copy-on-write using the source's backing |
3166 | * file. | |
3167 | */ | |
2a32c6e8 | 3168 | target_bs = bdrv_open(arg->target, NULL, options, flags, errp); |
5b363937 | 3169 | if (!target_bs) { |
5a7e7a0b | 3170 | goto out; |
d9b902db PB |
3171 | } |
3172 | ||
cdf3bc93 HR |
3173 | zero_target = (arg->sync == MIRROR_SYNC_MODE_FULL && |
3174 | (arg->mode == NEW_IMAGE_MODE_EXISTING || | |
3175 | !bdrv_has_zero_init(target_bs))); | |
3176 | ||
3ea67e08 | 3177 | |
142e6907 | 3178 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
3ea67e08 SL |
3179 | old_context = bdrv_get_aio_context(target_bs); |
3180 | aio_context_release(aio_context); | |
3181 | aio_context_acquire(old_context); | |
3182 | ||
142e6907 | 3183 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
8ed7d42f KW |
3184 | if (ret < 0) { |
3185 | bdrv_unref(target_bs); | |
3ea67e08 SL |
3186 | aio_context_release(old_context); |
3187 | return; | |
8ed7d42f | 3188 | } |
5a7e7a0b | 3189 | |
3ea67e08 SL |
3190 | aio_context_release(old_context); |
3191 | aio_context_acquire(aio_context); | |
3192 | ||
54fde4ff MA |
3193 | blockdev_mirror_common(arg->job_id, bs, target_bs, |
3194 | arg->replaces, arg->sync, | |
cdf3bc93 HR |
3195 | backing_mode, zero_target, |
3196 | arg->has_speed, arg->speed, | |
faecd40a EB |
3197 | arg->has_granularity, arg->granularity, |
3198 | arg->has_buf_size, arg->buf_size, | |
3199 | arg->has_on_source_error, arg->on_source_error, | |
3200 | arg->has_on_target_error, arg->on_target_error, | |
3201 | arg->has_unmap, arg->unmap, | |
54fde4ff | 3202 | NULL, |
481debaa | 3203 | arg->has_copy_mode, arg->copy_mode, |
a6b58ade JS |
3204 | arg->has_auto_finalize, arg->auto_finalize, |
3205 | arg->has_auto_dismiss, arg->auto_dismiss, | |
992861fb | 3206 | errp); |
e253f4b8 | 3207 | bdrv_unref(target_bs); |
5a7e7a0b SH |
3208 | out: |
3209 | aio_context_release(aio_context); | |
d9b902db PB |
3210 | } |
3211 | ||
54fde4ff | 3212 | void qmp_blockdev_mirror(const char *job_id, |
71aa9867 | 3213 | const char *device, const char *target, |
54fde4ff | 3214 | const char *replaces, |
df92562e FZ |
3215 | MirrorSyncMode sync, |
3216 | bool has_speed, int64_t speed, | |
3217 | bool has_granularity, uint32_t granularity, | |
3218 | bool has_buf_size, int64_t buf_size, | |
3219 | bool has_on_source_error, | |
3220 | BlockdevOnError on_source_error, | |
3221 | bool has_on_target_error, | |
3222 | BlockdevOnError on_target_error, | |
6cdbceb1 | 3223 | const char *filter_node_name, |
481debaa | 3224 | bool has_copy_mode, MirrorCopyMode copy_mode, |
a6b58ade JS |
3225 | bool has_auto_finalize, bool auto_finalize, |
3226 | bool has_auto_dismiss, bool auto_dismiss, | |
df92562e FZ |
3227 | Error **errp) |
3228 | { | |
3229 | BlockDriverState *bs; | |
df92562e FZ |
3230 | BlockDriverState *target_bs; |
3231 | AioContext *aio_context; | |
3ea67e08 | 3232 | AioContext *old_context; |
274fccee | 3233 | BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN; |
cdf3bc93 | 3234 | bool zero_target; |
8ed7d42f | 3235 | int ret; |
df92562e | 3236 | |
07eec652 | 3237 | bs = qmp_get_root_bs(device, errp); |
df92562e | 3238 | if (!bs) { |
df92562e FZ |
3239 | return; |
3240 | } | |
3241 | ||
3242 | target_bs = bdrv_lookup_bs(target, target, errp); | |
3243 | if (!target_bs) { | |
3244 | return; | |
3245 | } | |
3246 | ||
cdf3bc93 HR |
3247 | zero_target = (sync == MIRROR_SYNC_MODE_FULL); |
3248 | ||
142e6907 | 3249 | /* Honor bdrv_try_change_aio_context() context acquisition requirements. */ |
3ea67e08 | 3250 | old_context = bdrv_get_aio_context(target_bs); |
df92562e | 3251 | aio_context = bdrv_get_aio_context(bs); |
3ea67e08 | 3252 | aio_context_acquire(old_context); |
df92562e | 3253 | |
142e6907 | 3254 | ret = bdrv_try_change_aio_context(target_bs, aio_context, NULL, errp); |
3ea67e08 SL |
3255 | |
3256 | aio_context_release(old_context); | |
3257 | aio_context_acquire(aio_context); | |
3258 | ||
8ed7d42f KW |
3259 | if (ret < 0) { |
3260 | goto out; | |
3261 | } | |
df92562e | 3262 | |
54fde4ff MA |
3263 | blockdev_mirror_common(job_id, bs, target_bs, |
3264 | replaces, sync, backing_mode, | |
cdf3bc93 | 3265 | zero_target, has_speed, speed, |
df92562e FZ |
3266 | has_granularity, granularity, |
3267 | has_buf_size, buf_size, | |
3268 | has_on_source_error, on_source_error, | |
3269 | has_on_target_error, on_target_error, | |
54fde4ff | 3270 | true, true, filter_node_name, |
481debaa | 3271 | has_copy_mode, copy_mode, |
a6b58ade JS |
3272 | has_auto_finalize, auto_finalize, |
3273 | has_auto_dismiss, auto_dismiss, | |
992861fb | 3274 | errp); |
8ed7d42f | 3275 | out: |
df92562e FZ |
3276 | aio_context_release(aio_context); |
3277 | } | |
3278 | ||
96241124 | 3279 | /* |
6f592e5a | 3280 | * Get a block job using its ID. Called with job_mutex held. |
96241124 | 3281 | */ |
6f592e5a | 3282 | static BlockJob *find_block_job_locked(const char *id, Error **errp) |
2d47c6e9 | 3283 | { |
3ddf3efe | 3284 | BlockJob *job; |
2d47c6e9 | 3285 | |
3ddf3efe | 3286 | assert(id != NULL); |
5433c24f | 3287 | |
96241124 | 3288 | job = block_job_get_locked(id); |
5433c24f | 3289 | |
3ddf3efe AG |
3290 | if (!job) { |
3291 | error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE, | |
3292 | "Block job '%s' not found", id); | |
3293 | return NULL; | |
2d47c6e9 | 3294 | } |
3d948cdf | 3295 | |
3ddf3efe | 3296 | return job; |
2d47c6e9 SH |
3297 | } |
3298 | ||
882ec7ce | 3299 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
2d47c6e9 | 3300 | { |
96241124 EGE |
3301 | BlockJob *job; |
3302 | ||
3303 | JOB_LOCK_GUARD(); | |
6f592e5a | 3304 | job = find_block_job_locked(device, errp); |
2d47c6e9 SH |
3305 | |
3306 | if (!job) { | |
2d47c6e9 SH |
3307 | return; |
3308 | } | |
3309 | ||
96241124 | 3310 | block_job_set_speed_locked(job, speed, errp); |
2d47c6e9 | 3311 | } |
370521a1 | 3312 | |
6e37fb81 PB |
3313 | void qmp_block_job_cancel(const char *device, |
3314 | bool has_force, bool force, Error **errp) | |
370521a1 | 3315 | { |
96241124 EGE |
3316 | BlockJob *job; |
3317 | ||
3318 | JOB_LOCK_GUARD(); | |
6f592e5a | 3319 | job = find_block_job_locked(device, errp); |
6e37fb81 | 3320 | |
370521a1 | 3321 | if (!job) { |
370521a1 SH |
3322 | return; |
3323 | } | |
3d948cdf SH |
3324 | |
3325 | if (!has_force) { | |
3326 | force = false; | |
3327 | } | |
3328 | ||
96241124 | 3329 | if (job_user_paused_locked(&job->job) && !force) { |
f231b88d CR |
3330 | error_setg(errp, "The block job for device '%s' is currently paused", |
3331 | device); | |
6f592e5a | 3332 | return; |
8acc72a4 | 3333 | } |
370521a1 SH |
3334 | |
3335 | trace_qmp_block_job_cancel(job); | |
96241124 | 3336 | job_user_cancel_locked(&job->job, force, errp); |
370521a1 | 3337 | } |
fb5458cd | 3338 | |
6e37fb81 PB |
3339 | void qmp_block_job_pause(const char *device, Error **errp) |
3340 | { | |
96241124 EGE |
3341 | BlockJob *job; |
3342 | ||
3343 | JOB_LOCK_GUARD(); | |
6f592e5a | 3344 | job = find_block_job_locked(device, errp); |
6e37fb81 | 3345 | |
0ec4dfb8 | 3346 | if (!job) { |
6e37fb81 PB |
3347 | return; |
3348 | } | |
3349 | ||
3350 | trace_qmp_block_job_pause(job); | |
96241124 | 3351 | job_user_pause_locked(&job->job, errp); |
6e37fb81 PB |
3352 | } |
3353 | ||
3354 | void qmp_block_job_resume(const char *device, Error **errp) | |
3355 | { | |
96241124 EGE |
3356 | BlockJob *job; |
3357 | ||
3358 | JOB_LOCK_GUARD(); | |
6f592e5a | 3359 | job = find_block_job_locked(device, errp); |
6e37fb81 | 3360 | |
0ec4dfb8 | 3361 | if (!job) { |
6e37fb81 PB |
3362 | return; |
3363 | } | |
3364 | ||
3365 | trace_qmp_block_job_resume(job); | |
96241124 | 3366 | job_user_resume_locked(&job->job, errp); |
6e37fb81 PB |
3367 | } |
3368 | ||
aeae883b PB |
3369 | void qmp_block_job_complete(const char *device, Error **errp) |
3370 | { | |
96241124 EGE |
3371 | BlockJob *job; |
3372 | ||
3373 | JOB_LOCK_GUARD(); | |
6f592e5a | 3374 | job = find_block_job_locked(device, errp); |
aeae883b PB |
3375 | |
3376 | if (!job) { | |
aeae883b PB |
3377 | return; |
3378 | } | |
3379 | ||
3380 | trace_qmp_block_job_complete(job); | |
96241124 | 3381 | job_complete_locked(&job->job, errp); |
aeae883b PB |
3382 | } |
3383 | ||
11b61fbc JS |
3384 | void qmp_block_job_finalize(const char *id, Error **errp) |
3385 | { | |
96241124 EGE |
3386 | BlockJob *job; |
3387 | ||
3388 | JOB_LOCK_GUARD(); | |
6f592e5a | 3389 | job = find_block_job_locked(id, errp); |
11b61fbc JS |
3390 | |
3391 | if (!job) { | |
3392 | return; | |
3393 | } | |
3394 | ||
3395 | trace_qmp_block_job_finalize(job); | |
96241124 EGE |
3396 | job_ref_locked(&job->job); |
3397 | job_finalize_locked(&job->job, errp); | |
b660a84b | 3398 | |
96241124 | 3399 | job_unref_locked(&job->job); |
11b61fbc JS |
3400 | } |
3401 | ||
75f71059 JS |
3402 | void qmp_block_job_dismiss(const char *id, Error **errp) |
3403 | { | |
96241124 | 3404 | BlockJob *bjob; |
5f9a6a08 | 3405 | Job *job; |
75f71059 | 3406 | |
96241124 | 3407 | JOB_LOCK_GUARD(); |
6f592e5a | 3408 | bjob = find_block_job_locked(id, errp); |
96241124 | 3409 | |
5f9a6a08 | 3410 | if (!bjob) { |
75f71059 JS |
3411 | return; |
3412 | } | |
3413 | ||
5f9a6a08 KW |
3414 | trace_qmp_block_job_dismiss(bjob); |
3415 | job = &bjob->job; | |
96241124 | 3416 | job_dismiss_locked(&job, errp); |
75f71059 JS |
3417 | } |
3418 | ||
fa40e656 JC |
3419 | void qmp_change_backing_file(const char *device, |
3420 | const char *image_node_name, | |
3421 | const char *backing_file, | |
3422 | Error **errp) | |
3423 | { | |
3424 | BlockDriverState *bs = NULL; | |
729962f6 | 3425 | AioContext *aio_context; |
fa40e656 JC |
3426 | BlockDriverState *image_bs = NULL; |
3427 | Error *local_err = NULL; | |
3428 | bool ro; | |
fa40e656 JC |
3429 | int ret; |
3430 | ||
7b5dca3f KW |
3431 | bs = qmp_get_root_bs(device, errp); |
3432 | if (!bs) { | |
fa40e656 JC |
3433 | return; |
3434 | } | |
3435 | ||
7b5dca3f | 3436 | aio_context = bdrv_get_aio_context(bs); |
729962f6 SH |
3437 | aio_context_acquire(aio_context); |
3438 | ||
fa40e656 JC |
3439 | image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err); |
3440 | if (local_err) { | |
3441 | error_propagate(errp, local_err); | |
729962f6 | 3442 | goto out; |
fa40e656 JC |
3443 | } |
3444 | ||
3445 | if (!image_bs) { | |
3446 | error_setg(errp, "image file not found"); | |
729962f6 | 3447 | goto out; |
fa40e656 JC |
3448 | } |
3449 | ||
3450 | if (bdrv_find_base(image_bs) == image_bs) { | |
3451 | error_setg(errp, "not allowing backing file change on an image " | |
3452 | "without a backing file"); | |
729962f6 | 3453 | goto out; |
fa40e656 JC |
3454 | } |
3455 | ||
3456 | /* even though we are not necessarily operating on bs, we need it to | |
3457 | * determine if block ops are currently prohibited on the chain */ | |
3458 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) { | |
729962f6 | 3459 | goto out; |
fa40e656 JC |
3460 | } |
3461 | ||
3462 | /* final sanity check */ | |
3463 | if (!bdrv_chain_contains(bs, image_bs)) { | |
3464 | error_setg(errp, "'%s' and image file are not in the same chain", | |
3465 | device); | |
729962f6 | 3466 | goto out; |
fa40e656 JC |
3467 | } |
3468 | ||
3469 | /* if not r/w, reopen to make r/w */ | |
fa40e656 JC |
3470 | ro = bdrv_is_read_only(image_bs); |
3471 | ||
3472 | if (ro) { | |
051a60f6 | 3473 | if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) { |
729962f6 | 3474 | goto out; |
fa40e656 JC |
3475 | } |
3476 | } | |
3477 | ||
3478 | ret = bdrv_change_backing_file(image_bs, backing_file, | |
e54ee1b3 EB |
3479 | image_bs->drv ? image_bs->drv->format_name : "", |
3480 | false); | |
fa40e656 JC |
3481 | |
3482 | if (ret < 0) { | |
3483 | error_setg_errno(errp, -ret, "Could not change backing file to '%s'", | |
3484 | backing_file); | |
3485 | /* don't exit here, so we can try to restore open flags if | |
3486 | * appropriate */ | |
3487 | } | |
3488 | ||
3489 | if (ro) { | |
992861fb | 3490 | bdrv_reopen_set_read_only(image_bs, true, errp); |
fa40e656 | 3491 | } |
729962f6 SH |
3492 | |
3493 | out: | |
3494 | aio_context_release(aio_context); | |
fa40e656 JC |
3495 | } |
3496 | ||
d26c9a15 KW |
3497 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) |
3498 | { | |
be4b67bc | 3499 | BlockDriverState *bs; |
d26c9a15 | 3500 | QObject *obj; |
7d5e199a | 3501 | Visitor *v = qobject_output_visitor_new(&obj); |
d26c9a15 | 3502 | QDict *qdict; |
d26c9a15 | 3503 | |
1f584248 | 3504 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); |
3b098d56 | 3505 | visit_complete(v, &obj); |
7dc847eb | 3506 | qdict = qobject_to(QDict, obj); |
d26c9a15 KW |
3507 | |
3508 | qdict_flatten(qdict); | |
3509 | ||
9ec8873e KW |
3510 | if (!qdict_get_try_str(qdict, "node-name")) { |
3511 | error_setg(errp, "'node-name' must be specified for the root node"); | |
3512 | goto fail; | |
3513 | } | |
9c4218e9 | 3514 | |
9ec8873e KW |
3515 | bs = bds_tree_init(qdict, errp); |
3516 | if (!bs) { | |
3517 | goto fail; | |
d26c9a15 KW |
3518 | } |
3519 | ||
89802d5a | 3520 | bdrv_set_monitor_owned(bs); |
9ec8873e | 3521 | |
d26c9a15 | 3522 | fail: |
3b098d56 | 3523 | visit_free(v); |
d26c9a15 KW |
3524 | } |
3525 | ||
e60edf69 | 3526 | void qmp_blockdev_reopen(BlockdevOptionsList *reopen_list, Error **errp) |
3908b7a8 AG |
3527 | { |
3528 | BlockReopenQueue *queue = NULL; | |
3908b7a8 AG |
3529 | |
3530 | /* Add each one of the BDS that we want to reopen to the queue */ | |
3531 | for (; reopen_list != NULL; reopen_list = reopen_list->next) { | |
3532 | BlockdevOptions *options = reopen_list->value; | |
3533 | BlockDriverState *bs; | |
3534 | AioContext *ctx; | |
3535 | QObject *obj; | |
3536 | Visitor *v; | |
3537 | QDict *qdict; | |
3538 | ||
3539 | /* Check for the selected node name */ | |
54fde4ff | 3540 | if (!options->node_name) { |
3908b7a8 AG |
3541 | error_setg(errp, "node-name not specified"); |
3542 | goto fail; | |
3543 | } | |
1479c730 | 3544 | |
3908b7a8 AG |
3545 | bs = bdrv_find_node(options->node_name); |
3546 | if (!bs) { | |
3547 | error_setg(errp, "Failed to find node with node-name='%s'", | |
3548 | options->node_name); | |
3549 | goto fail; | |
3550 | } | |
1479c730 | 3551 | |
3908b7a8 AG |
3552 | /* Put all options in a QDict and flatten it */ |
3553 | v = qobject_output_visitor_new(&obj); | |
3554 | visit_type_BlockdevOptions(v, NULL, &options, &error_abort); | |
3555 | visit_complete(v, &obj); | |
3556 | visit_free(v); | |
1479c730 | 3557 | |
3908b7a8 | 3558 | qdict = qobject_to(QDict, obj); |
1479c730 | 3559 | |
3908b7a8 | 3560 | qdict_flatten(qdict); |
1479c730 | 3561 | |
3908b7a8 AG |
3562 | ctx = bdrv_get_aio_context(bs); |
3563 | aio_context_acquire(ctx); | |
6cf42ca2 | 3564 | |
3908b7a8 | 3565 | queue = bdrv_reopen_queue(queue, bs, qdict, false); |
6cf42ca2 | 3566 | |
3908b7a8 AG |
3567 | aio_context_release(ctx); |
3568 | } | |
3569 | ||
3570 | /* Perform the reopen operation */ | |
3571 | bdrv_reopen_multiple(queue, errp); | |
3572 | queue = NULL; | |
1479c730 AG |
3573 | |
3574 | fail: | |
3908b7a8 | 3575 | bdrv_reopen_queue_free(queue); |
1479c730 AG |
3576 | } |
3577 | ||
79b7a77e | 3578 | void qmp_blockdev_del(const char *node_name, Error **errp) |
81b936ae AG |
3579 | { |
3580 | AioContext *aio_context; | |
81b936ae AG |
3581 | BlockDriverState *bs; |
3582 | ||
b4ad82aa EGE |
3583 | GLOBAL_STATE_CODE(); |
3584 | ||
9ec8873e KW |
3585 | bs = bdrv_find_node(node_name); |
3586 | if (!bs) { | |
ef2e38a1 | 3587 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); |
81b936ae AG |
3588 | return; |
3589 | } | |
9ec8873e KW |
3590 | if (bdrv_has_blk(bs)) { |
3591 | error_setg(errp, "Node %s is in use", node_name); | |
3592 | return; | |
81b936ae | 3593 | } |
9ec8873e | 3594 | aio_context = bdrv_get_aio_context(bs); |
81b936ae AG |
3595 | aio_context_acquire(aio_context); |
3596 | ||
9ec8873e KW |
3597 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) { |
3598 | goto out; | |
3599 | } | |
9c4218e9 | 3600 | |
70537ed5 | 3601 | if (!QTAILQ_IN_USE(bs, monitor_list)) { |
9ec8873e KW |
3602 | error_setg(errp, "Node %s is not owned by the monitor", |
3603 | bs->node_name); | |
3604 | goto out; | |
81b936ae AG |
3605 | } |
3606 | ||
9ec8873e KW |
3607 | if (bs->refcnt > 1) { |
3608 | error_setg(errp, "Block device %s is in use", | |
3609 | bdrv_get_device_or_node_name(bs)); | |
3610 | goto out; | |
81b936ae AG |
3611 | } |
3612 | ||
9ec8873e KW |
3613 | QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list); |
3614 | bdrv_unref(bs); | |
3615 | ||
81b936ae AG |
3616 | out: |
3617 | aio_context_release(aio_context); | |
3618 | } | |
3619 | ||
7f821597 WC |
3620 | static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs, |
3621 | const char *child_name) | |
3622 | { | |
3623 | BdrvChild *child; | |
3624 | ||
3625 | QLIST_FOREACH(child, &parent_bs->children, next) { | |
3626 | if (strcmp(child->name, child_name) == 0) { | |
3627 | return child; | |
3628 | } | |
3629 | } | |
3630 | ||
3631 | return NULL; | |
3632 | } | |
3633 | ||
54fde4ff | 3634 | void qmp_x_blockdev_change(const char *parent, const char *child, |
7f821597 WC |
3635 | const char *node, Error **errp) |
3636 | { | |
3637 | BlockDriverState *parent_bs, *new_bs = NULL; | |
3638 | BdrvChild *p_child; | |
3639 | ||
3640 | parent_bs = bdrv_lookup_bs(parent, parent, errp); | |
3641 | if (!parent_bs) { | |
3642 | return; | |
3643 | } | |
3644 | ||
54fde4ff MA |
3645 | if (!child == !node) { |
3646 | if (child) { | |
7f821597 WC |
3647 | error_setg(errp, "The parameters child and node are in conflict"); |
3648 | } else { | |
3649 | error_setg(errp, "Either child or node must be specified"); | |
3650 | } | |
3651 | return; | |
3652 | } | |
3653 | ||
54fde4ff | 3654 | if (child) { |
7f821597 WC |
3655 | p_child = bdrv_find_child(parent_bs, child); |
3656 | if (!p_child) { | |
3657 | error_setg(errp, "Node '%s' does not have child '%s'", | |
3658 | parent, child); | |
3659 | return; | |
3660 | } | |
3661 | bdrv_del_child(parent_bs, p_child, errp); | |
3662 | } | |
3663 | ||
54fde4ff | 3664 | if (node) { |
7f821597 WC |
3665 | new_bs = bdrv_find_node(node); |
3666 | if (!new_bs) { | |
3667 | error_setg(errp, "Node '%s' not found", node); | |
3668 | return; | |
3669 | } | |
3670 | bdrv_add_child(parent_bs, new_bs, errp); | |
3671 | } | |
3672 | } | |
3673 | ||
fea68bb6 | 3674 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
fb5458cd | 3675 | { |
c3033fd3 | 3676 | BlockJobInfoList *head = NULL, **tail = &head; |
f0f55ded | 3677 | BlockJob *job; |
fb5458cd | 3678 | |
880eeec6 EGE |
3679 | JOB_LOCK_GUARD(); |
3680 | ||
3681 | for (job = block_job_next_locked(NULL); job; | |
3682 | job = block_job_next_locked(job)) { | |
c3033fd3 | 3683 | BlockJobInfo *value; |
69691e72 | 3684 | |
559b935f JS |
3685 | if (block_job_is_internal(job)) { |
3686 | continue; | |
3687 | } | |
880eeec6 | 3688 | value = block_job_query_locked(job, errp); |
c3033fd3 | 3689 | if (!value) { |
559b935f JS |
3690 | qapi_free_BlockJobInfoList(head); |
3691 | return NULL; | |
3692 | } | |
c3033fd3 | 3693 | QAPI_LIST_APPEND(tail, value); |
fb5458cd | 3694 | } |
fb5458cd | 3695 | |
fea68bb6 | 3696 | return head; |
fb5458cd | 3697 | } |
4d454574 | 3698 | |
ca00bbb1 | 3699 | void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread, |
882e9b89 | 3700 | bool has_force, bool force, Error **errp) |
ca00bbb1 SH |
3701 | { |
3702 | AioContext *old_context; | |
3703 | AioContext *new_context; | |
3704 | BlockDriverState *bs; | |
3705 | ||
3706 | bs = bdrv_find_node(node_name); | |
3707 | if (!bs) { | |
ef2e38a1 | 3708 | error_setg(errp, "Failed to find node with node-name='%s'", node_name); |
ca00bbb1 SH |
3709 | return; |
3710 | } | |
3711 | ||
882e9b89 SH |
3712 | /* Protects against accidents. */ |
3713 | if (!(has_force && force) && bdrv_has_blk(bs)) { | |
3714 | error_setg(errp, "Node %s is associated with a BlockBackend and could " | |
3715 | "be in use (use force=true to override this check)", | |
3716 | node_name); | |
ca00bbb1 SH |
3717 | return; |
3718 | } | |
3719 | ||
3720 | if (iothread->type == QTYPE_QSTRING) { | |
3721 | IOThread *obj = iothread_by_id(iothread->u.s); | |
3722 | if (!obj) { | |
3723 | error_setg(errp, "Cannot find iothread %s", iothread->u.s); | |
3724 | return; | |
3725 | } | |
3726 | ||
3727 | new_context = iothread_get_aio_context(obj); | |
3728 | } else { | |
3729 | new_context = qemu_get_aio_context(); | |
3730 | } | |
3731 | ||
3732 | old_context = bdrv_get_aio_context(bs); | |
3733 | aio_context_acquire(old_context); | |
3734 | ||
142e6907 | 3735 | bdrv_try_change_aio_context(bs, new_context, NULL, errp); |
ca00bbb1 SH |
3736 | |
3737 | aio_context_release(old_context); | |
3738 | } | |
3739 | ||
0006383e | 3740 | QemuOptsList qemu_common_drive_opts = { |
4d454574 | 3741 | .name = "drive", |
0006383e | 3742 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
4d454574 PB |
3743 | .desc = { |
3744 | { | |
4d454574 PB |
3745 | .name = "snapshot", |
3746 | .type = QEMU_OPT_BOOL, | |
3747 | .help = "enable/disable snapshot mode", | |
4d454574 PB |
3748 | },{ |
3749 | .name = "aio", | |
3750 | .type = QEMU_OPT_STRING, | |
f80f2673 | 3751 | .help = "host AIO implementation (threads, native, io_uring)", |
e4b24b49 KW |
3752 | },{ |
3753 | .name = BDRV_OPT_CACHE_WB, | |
3754 | .type = QEMU_OPT_BOOL, | |
3755 | .help = "Enable writeback mode", | |
4d454574 PB |
3756 | },{ |
3757 | .name = "format", | |
3758 | .type = QEMU_OPT_STRING, | |
3759 | .help = "disk format (raw, qcow2, ...)", | |
4d454574 PB |
3760 | },{ |
3761 | .name = "rerror", | |
3762 | .type = QEMU_OPT_STRING, | |
3763 | .help = "read error action", | |
3764 | },{ | |
3765 | .name = "werror", | |
3766 | .type = QEMU_OPT_STRING, | |
3767 | .help = "write error action", | |
4d454574 | 3768 | },{ |
4e200cf8 | 3769 | .name = BDRV_OPT_READ_ONLY, |
4d454574 PB |
3770 | .type = QEMU_OPT_BOOL, |
3771 | .help = "open drive file as read-only", | |
a2a7862c PJ |
3772 | }, |
3773 | ||
3774 | THROTTLE_OPTS, | |
3775 | ||
3776 | { | |
76f4afb4 AG |
3777 | .name = "throttling.group", |
3778 | .type = QEMU_OPT_STRING, | |
3779 | .help = "name of the block throttling group", | |
4d454574 PB |
3780 | },{ |
3781 | .name = "copy-on-read", | |
3782 | .type = QEMU_OPT_BOOL, | |
3783 | .help = "copy read data from backing file into image file", | |
465bee1d PL |
3784 | },{ |
3785 | .name = "detect-zeroes", | |
3786 | .type = QEMU_OPT_STRING, | |
3787 | .help = "try to optimize zero writes (off, on, unmap)", | |
362e9299 AG |
3788 | },{ |
3789 | .name = "stats-account-invalid", | |
3790 | .type = QEMU_OPT_BOOL, | |
3791 | .help = "whether to account for invalid I/O operations " | |
3792 | "in the statistics", | |
3793 | },{ | |
3794 | .name = "stats-account-failed", | |
3795 | .type = QEMU_OPT_BOOL, | |
3796 | .help = "whether to account for failed I/O operations " | |
3797 | "in the statistics", | |
4d454574 PB |
3798 | }, |
3799 | { /* end of list */ } | |
3800 | }, | |
3801 | }; | |
0006383e KW |
3802 | |
3803 | QemuOptsList qemu_drive_opts = { | |
3804 | .name = "drive", | |
3805 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
3806 | .desc = { | |
492fdc6f KW |
3807 | /* |
3808 | * no elements => accept any params | |
3809 | * validation will happen later | |
3810 | */ | |
0006383e KW |
3811 | { /* end of list */ } |
3812 | }, | |
3813 | }; |