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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 | ||
9c17d615 | 33 | #include "sysemu/blockdev.h" |
0d09e41a | 34 | #include "hw/block/block.h" |
737e150e | 35 | #include "block/blockjob.h" |
83c9089e | 36 | #include "monitor/monitor.h" |
1de7afc9 PB |
37 | #include "qemu/option.h" |
38 | #include "qemu/config-file.h" | |
7b1b5d19 | 39 | #include "qapi/qmp/types.h" |
d26c9a15 KW |
40 | #include "qapi-visit.h" |
41 | #include "qapi/qmp-output-visitor.h" | |
9c17d615 | 42 | #include "sysemu/sysemu.h" |
737e150e | 43 | #include "block/block_int.h" |
a4dea8a9 | 44 | #include "qmp-commands.h" |
12bd451f | 45 | #include "trace.h" |
9c17d615 | 46 | #include "sysemu/arch_init.h" |
666daa68 | 47 | |
c9b62a7e | 48 | static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives); |
666daa68 | 49 | |
1960966d MA |
50 | static const char *const if_name[IF_COUNT] = { |
51 | [IF_NONE] = "none", | |
52 | [IF_IDE] = "ide", | |
53 | [IF_SCSI] = "scsi", | |
54 | [IF_FLOPPY] = "floppy", | |
55 | [IF_PFLASH] = "pflash", | |
56 | [IF_MTD] = "mtd", | |
57 | [IF_SD] = "sd", | |
58 | [IF_VIRTIO] = "virtio", | |
59 | [IF_XEN] = "xen", | |
60 | }; | |
61 | ||
62 | static const int if_max_devs[IF_COUNT] = { | |
27d6bf40 MA |
63 | /* |
64 | * Do not change these numbers! They govern how drive option | |
65 | * index maps to unit and bus. That mapping is ABI. | |
66 | * | |
67 | * All controllers used to imlement if=T drives need to support | |
68 | * if_max_devs[T] units, for any T with if_max_devs[T] != 0. | |
69 | * Otherwise, some index values map to "impossible" bus, unit | |
70 | * values. | |
71 | * | |
72 | * For instance, if you change [IF_SCSI] to 255, -drive | |
73 | * if=scsi,index=12 no longer means bus=1,unit=5, but | |
74 | * bus=0,unit=12. With an lsi53c895a controller (7 units max), | |
75 | * the drive can't be set up. Regression. | |
76 | */ | |
77 | [IF_IDE] = 2, | |
78 | [IF_SCSI] = 7, | |
1960966d MA |
79 | }; |
80 | ||
14bafc54 MA |
81 | /* |
82 | * We automatically delete the drive when a device using it gets | |
83 | * unplugged. Questionable feature, but we can't just drop it. | |
84 | * Device models call blockdev_mark_auto_del() to schedule the | |
85 | * automatic deletion, and generic qdev code calls blockdev_auto_del() | |
86 | * when deletion is actually safe. | |
87 | */ | |
88 | void blockdev_mark_auto_del(BlockDriverState *bs) | |
89 | { | |
90 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
91 | ||
2d246f01 KW |
92 | if (dinfo && !dinfo->enable_auto_del) { |
93 | return; | |
94 | } | |
95 | ||
12bde0ee PB |
96 | if (bs->job) { |
97 | block_job_cancel(bs->job); | |
98 | } | |
0fc0f1fa RH |
99 | if (dinfo) { |
100 | dinfo->auto_del = 1; | |
101 | } | |
14bafc54 MA |
102 | } |
103 | ||
104 | void blockdev_auto_del(BlockDriverState *bs) | |
105 | { | |
106 | DriveInfo *dinfo = drive_get_by_blockdev(bs); | |
107 | ||
0fc0f1fa | 108 | if (dinfo && dinfo->auto_del) { |
84fb3925 | 109 | drive_put_ref(dinfo); |
14bafc54 MA |
110 | } |
111 | } | |
112 | ||
505a7fb1 MA |
113 | static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
114 | { | |
115 | int max_devs = if_max_devs[type]; | |
116 | return max_devs ? index / max_devs : 0; | |
117 | } | |
118 | ||
119 | static int drive_index_to_unit_id(BlockInterfaceType type, int index) | |
120 | { | |
121 | int max_devs = if_max_devs[type]; | |
122 | return max_devs ? index % max_devs : index; | |
123 | } | |
124 | ||
2292ddae MA |
125 | QemuOpts *drive_def(const char *optstr) |
126 | { | |
127 | return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); | |
128 | } | |
129 | ||
130 | QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, | |
5645b0f4 | 131 | const char *optstr) |
666daa68 | 132 | { |
666daa68 | 133 | QemuOpts *opts; |
2292ddae | 134 | char buf[32]; |
666daa68 | 135 | |
2292ddae | 136 | opts = drive_def(optstr); |
666daa68 MA |
137 | if (!opts) { |
138 | return NULL; | |
139 | } | |
2292ddae MA |
140 | if (type != IF_DEFAULT) { |
141 | qemu_opt_set(opts, "if", if_name[type]); | |
142 | } | |
143 | if (index >= 0) { | |
144 | snprintf(buf, sizeof(buf), "%d", index); | |
145 | qemu_opt_set(opts, "index", buf); | |
146 | } | |
666daa68 MA |
147 | if (file) |
148 | qemu_opt_set(opts, "file", file); | |
149 | return opts; | |
150 | } | |
151 | ||
152 | DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) | |
153 | { | |
154 | DriveInfo *dinfo; | |
155 | ||
156 | /* seek interface, bus and unit */ | |
157 | ||
158 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
159 | if (dinfo->type == type && | |
160 | dinfo->bus == bus && | |
161 | dinfo->unit == unit) | |
162 | return dinfo; | |
163 | } | |
164 | ||
165 | return NULL; | |
166 | } | |
167 | ||
f1bd51ac MA |
168 | DriveInfo *drive_get_by_index(BlockInterfaceType type, int index) |
169 | { | |
170 | return drive_get(type, | |
171 | drive_index_to_bus_id(type, index), | |
172 | drive_index_to_unit_id(type, index)); | |
173 | } | |
174 | ||
666daa68 MA |
175 | int drive_get_max_bus(BlockInterfaceType type) |
176 | { | |
177 | int max_bus; | |
178 | DriveInfo *dinfo; | |
179 | ||
180 | max_bus = -1; | |
181 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
182 | if(dinfo->type == type && | |
183 | dinfo->bus > max_bus) | |
184 | max_bus = dinfo->bus; | |
185 | } | |
186 | return max_bus; | |
187 | } | |
188 | ||
13839974 MA |
189 | /* Get a block device. This should only be used for single-drive devices |
190 | (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the | |
191 | appropriate bus. */ | |
192 | DriveInfo *drive_get_next(BlockInterfaceType type) | |
193 | { | |
194 | static int next_block_unit[IF_COUNT]; | |
195 | ||
196 | return drive_get(type, 0, next_block_unit[type]++); | |
197 | } | |
198 | ||
e4700e59 | 199 | DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) |
666daa68 MA |
200 | { |
201 | DriveInfo *dinfo; | |
202 | ||
203 | QTAILQ_FOREACH(dinfo, &drives, next) { | |
e4700e59 MA |
204 | if (dinfo->bdrv == bs) { |
205 | return dinfo; | |
206 | } | |
666daa68 | 207 | } |
e4700e59 | 208 | return NULL; |
666daa68 MA |
209 | } |
210 | ||
666daa68 MA |
211 | static void bdrv_format_print(void *opaque, const char *name) |
212 | { | |
807105a7 | 213 | error_printf(" %s", name); |
666daa68 MA |
214 | } |
215 | ||
84fb3925 | 216 | static void drive_uninit(DriveInfo *dinfo) |
666daa68 | 217 | { |
f298d071 KW |
218 | if (dinfo->opts) { |
219 | qemu_opts_del(dinfo->opts); | |
220 | } | |
221 | ||
4f6fd349 | 222 | bdrv_unref(dinfo->bdrv); |
7267c094 | 223 | g_free(dinfo->id); |
666daa68 | 224 | QTAILQ_REMOVE(&drives, dinfo, next); |
bb44619b | 225 | g_free(dinfo->serial); |
7267c094 | 226 | g_free(dinfo); |
666daa68 MA |
227 | } |
228 | ||
84fb3925 MT |
229 | void drive_put_ref(DriveInfo *dinfo) |
230 | { | |
231 | assert(dinfo->refcount); | |
232 | if (--dinfo->refcount == 0) { | |
233 | drive_uninit(dinfo); | |
234 | } | |
235 | } | |
236 | ||
237 | void drive_get_ref(DriveInfo *dinfo) | |
238 | { | |
239 | dinfo->refcount++; | |
240 | } | |
241 | ||
aa398a5c SH |
242 | typedef struct { |
243 | QEMUBH *bh; | |
fa510ebf FZ |
244 | BlockDriverState *bs; |
245 | } BDRVPutRefBH; | |
aa398a5c | 246 | |
fa510ebf | 247 | static void bdrv_put_ref_bh(void *opaque) |
aa398a5c | 248 | { |
fa510ebf | 249 | BDRVPutRefBH *s = opaque; |
aa398a5c | 250 | |
fa510ebf | 251 | bdrv_unref(s->bs); |
aa398a5c SH |
252 | qemu_bh_delete(s->bh); |
253 | g_free(s); | |
254 | } | |
255 | ||
256 | /* | |
fa510ebf | 257 | * Release a BDS reference in a BH |
aa398a5c | 258 | * |
fa510ebf FZ |
259 | * It is not safe to use bdrv_unref() from a callback function when the callers |
260 | * still need the BlockDriverState. In such cases we schedule a BH to release | |
261 | * the reference. | |
aa398a5c | 262 | */ |
fa510ebf | 263 | static void bdrv_put_ref_bh_schedule(BlockDriverState *bs) |
aa398a5c | 264 | { |
fa510ebf | 265 | BDRVPutRefBH *s; |
aa398a5c | 266 | |
fa510ebf FZ |
267 | s = g_new(BDRVPutRefBH, 1); |
268 | s->bh = qemu_bh_new(bdrv_put_ref_bh, s); | |
269 | s->bs = bs; | |
aa398a5c SH |
270 | qemu_bh_schedule(s->bh); |
271 | } | |
272 | ||
b681072d | 273 | static int parse_block_error_action(const char *buf, bool is_read, Error **errp) |
666daa68 MA |
274 | { |
275 | if (!strcmp(buf, "ignore")) { | |
92aa5c6d | 276 | return BLOCKDEV_ON_ERROR_IGNORE; |
666daa68 | 277 | } else if (!is_read && !strcmp(buf, "enospc")) { |
92aa5c6d | 278 | return BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 279 | } else if (!strcmp(buf, "stop")) { |
92aa5c6d | 280 | return BLOCKDEV_ON_ERROR_STOP; |
666daa68 | 281 | } else if (!strcmp(buf, "report")) { |
92aa5c6d | 282 | return BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 283 | } else { |
b681072d KW |
284 | error_setg(errp, "'%s' invalid %s error action", |
285 | buf, is_read ? "read" : "write"); | |
666daa68 MA |
286 | return -1; |
287 | } | |
288 | } | |
289 | ||
82a402e9 PL |
290 | static inline int parse_enum_option(const char *lookup[], const char *buf, |
291 | int max, int def, Error **errp) | |
292 | { | |
293 | int i; | |
294 | ||
295 | if (!buf) { | |
296 | return def; | |
297 | } | |
298 | ||
299 | for (i = 0; i < max; i++) { | |
300 | if (!strcmp(buf, lookup[i])) { | |
301 | return i; | |
302 | } | |
303 | } | |
304 | ||
305 | error_setg(errp, "invalid parameter value: %s", buf); | |
306 | return def; | |
307 | } | |
308 | ||
cc0681c4 | 309 | static bool check_throttle_config(ThrottleConfig *cfg, Error **errp) |
0563e191 | 310 | { |
cc0681c4 BC |
311 | if (throttle_conflicting(cfg)) { |
312 | error_setg(errp, "bps/iops/max total values and read/write values" | |
313 | " cannot be used at the same time"); | |
0563e191 ZYW |
314 | return false; |
315 | } | |
316 | ||
cc0681c4 BC |
317 | if (!throttle_is_valid(cfg)) { |
318 | error_setg(errp, "bps/iops/maxs values must be 0 or greater"); | |
7d81c141 SH |
319 | return false; |
320 | } | |
321 | ||
0563e191 ZYW |
322 | return true; |
323 | } | |
324 | ||
33cb7dc8 KW |
325 | typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType; |
326 | ||
f298d071 | 327 | /* Takes the ownership of bs_opts */ |
d095b465 | 328 | static DriveInfo *blockdev_init(const char *file, QDict *bs_opts, |
b681072d | 329 | Error **errp) |
666daa68 MA |
330 | { |
331 | const char *buf; | |
666daa68 | 332 | const char *serial; |
666daa68 MA |
333 | int ro = 0; |
334 | int bdrv_flags = 0; | |
335 | int on_read_error, on_write_error; | |
666daa68 | 336 | DriveInfo *dinfo; |
cc0681c4 | 337 | ThrottleConfig cfg; |
666daa68 | 338 | int snapshot = 0; |
fb0490f6 | 339 | bool copy_on_read; |
666daa68 | 340 | int ret; |
c546194f | 341 | Error *error = NULL; |
0006383e | 342 | QemuOpts *opts; |
0006383e | 343 | const char *id; |
74fe54f2 | 344 | bool has_driver_specific_opts; |
465bee1d | 345 | BlockdevDetectZeroesOptions detect_zeroes; |
6db5f5d6 | 346 | BlockDriver *drv = NULL; |
666daa68 | 347 | |
f298d071 KW |
348 | /* Check common options by copying from bs_opts to opts, all other options |
349 | * stay in bs_opts for processing by bdrv_open(). */ | |
350 | id = qdict_get_try_str(bs_opts, "id"); | |
0006383e | 351 | opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error); |
84d18f06 | 352 | if (error) { |
b681072d | 353 | error_propagate(errp, error); |
6376f952 | 354 | goto err_no_opts; |
0006383e KW |
355 | } |
356 | ||
0006383e | 357 | qemu_opts_absorb_qdict(opts, bs_opts, &error); |
84d18f06 | 358 | if (error) { |
b681072d | 359 | error_propagate(errp, error); |
ec9c10d2 | 360 | goto early_err; |
0006383e KW |
361 | } |
362 | ||
363 | if (id) { | |
364 | qdict_del(bs_opts, "id"); | |
365 | } | |
366 | ||
74fe54f2 KW |
367 | has_driver_specific_opts = !!qdict_size(bs_opts); |
368 | ||
666daa68 | 369 | /* extract parameters */ |
666daa68 | 370 | snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
0f227a94 | 371 | ro = qemu_opt_get_bool(opts, "read-only", 0); |
fb0490f6 | 372 | copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
666daa68 | 373 | |
666daa68 MA |
374 | serial = qemu_opt_get(opts, "serial"); |
375 | ||
a9384aff PB |
376 | if ((buf = qemu_opt_get(opts, "discard")) != NULL) { |
377 | if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { | |
b681072d | 378 | error_setg(errp, "invalid discard option"); |
ec9c10d2 | 379 | goto early_err; |
a9384aff PB |
380 | } |
381 | } | |
382 | ||
29c4e2b5 KW |
383 | if (qemu_opt_get_bool(opts, "cache.writeback", true)) { |
384 | bdrv_flags |= BDRV_O_CACHE_WB; | |
385 | } | |
386 | if (qemu_opt_get_bool(opts, "cache.direct", false)) { | |
387 | bdrv_flags |= BDRV_O_NOCACHE; | |
388 | } | |
1df6fa4b | 389 | if (qemu_opt_get_bool(opts, "cache.no-flush", false)) { |
29c4e2b5 | 390 | bdrv_flags |= BDRV_O_NO_FLUSH; |
666daa68 MA |
391 | } |
392 | ||
393 | #ifdef CONFIG_LINUX_AIO | |
394 | if ((buf = qemu_opt_get(opts, "aio")) != NULL) { | |
395 | if (!strcmp(buf, "native")) { | |
396 | bdrv_flags |= BDRV_O_NATIVE_AIO; | |
397 | } else if (!strcmp(buf, "threads")) { | |
398 | /* this is the default */ | |
399 | } else { | |
b681072d | 400 | error_setg(errp, "invalid aio option"); |
ec9c10d2 | 401 | goto early_err; |
666daa68 MA |
402 | } |
403 | } | |
404 | #endif | |
405 | ||
406 | if ((buf = qemu_opt_get(opts, "format")) != NULL) { | |
c8057f95 PM |
407 | if (is_help_option(buf)) { |
408 | error_printf("Supported formats:"); | |
409 | bdrv_iterate_format(bdrv_format_print, NULL); | |
410 | error_printf("\n"); | |
ec9c10d2 | 411 | goto early_err; |
666daa68 | 412 | } |
74fe54f2 | 413 | |
8f94a6e4 | 414 | drv = bdrv_find_format(buf); |
6db5f5d6 | 415 | if (!drv) { |
b681072d | 416 | error_setg(errp, "'%s' invalid format", buf); |
ec9c10d2 | 417 | goto early_err; |
6db5f5d6 | 418 | } |
666daa68 MA |
419 | } |
420 | ||
0563e191 | 421 | /* disk I/O throttling */ |
cc0681c4 BC |
422 | memset(&cfg, 0, sizeof(cfg)); |
423 | cfg.buckets[THROTTLE_BPS_TOTAL].avg = | |
57975222 | 424 | qemu_opt_get_number(opts, "throttling.bps-total", 0); |
cc0681c4 | 425 | cfg.buckets[THROTTLE_BPS_READ].avg = |
57975222 | 426 | qemu_opt_get_number(opts, "throttling.bps-read", 0); |
cc0681c4 | 427 | cfg.buckets[THROTTLE_BPS_WRITE].avg = |
57975222 | 428 | qemu_opt_get_number(opts, "throttling.bps-write", 0); |
cc0681c4 | 429 | cfg.buckets[THROTTLE_OPS_TOTAL].avg = |
57975222 | 430 | qemu_opt_get_number(opts, "throttling.iops-total", 0); |
cc0681c4 | 431 | cfg.buckets[THROTTLE_OPS_READ].avg = |
57975222 | 432 | qemu_opt_get_number(opts, "throttling.iops-read", 0); |
cc0681c4 | 433 | cfg.buckets[THROTTLE_OPS_WRITE].avg = |
57975222 | 434 | qemu_opt_get_number(opts, "throttling.iops-write", 0); |
0563e191 | 435 | |
3e9fab69 BC |
436 | cfg.buckets[THROTTLE_BPS_TOTAL].max = |
437 | qemu_opt_get_number(opts, "throttling.bps-total-max", 0); | |
438 | cfg.buckets[THROTTLE_BPS_READ].max = | |
439 | qemu_opt_get_number(opts, "throttling.bps-read-max", 0); | |
440 | cfg.buckets[THROTTLE_BPS_WRITE].max = | |
441 | qemu_opt_get_number(opts, "throttling.bps-write-max", 0); | |
442 | cfg.buckets[THROTTLE_OPS_TOTAL].max = | |
443 | qemu_opt_get_number(opts, "throttling.iops-total-max", 0); | |
444 | cfg.buckets[THROTTLE_OPS_READ].max = | |
445 | qemu_opt_get_number(opts, "throttling.iops-read-max", 0); | |
446 | cfg.buckets[THROTTLE_OPS_WRITE].max = | |
447 | qemu_opt_get_number(opts, "throttling.iops-write-max", 0); | |
cc0681c4 | 448 | |
2024c1df | 449 | cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0); |
cc0681c4 BC |
450 | |
451 | if (!check_throttle_config(&cfg, &error)) { | |
b681072d | 452 | error_propagate(errp, error); |
ec9c10d2 | 453 | goto early_err; |
0563e191 ZYW |
454 | } |
455 | ||
92aa5c6d | 456 | on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
666daa68 | 457 | if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
b681072d | 458 | on_write_error = parse_block_error_action(buf, 0, &error); |
84d18f06 | 459 | if (error) { |
b681072d | 460 | error_propagate(errp, error); |
ec9c10d2 | 461 | goto early_err; |
666daa68 MA |
462 | } |
463 | } | |
464 | ||
92aa5c6d | 465 | on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
666daa68 | 466 | if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
b681072d | 467 | on_read_error = parse_block_error_action(buf, 1, &error); |
84d18f06 | 468 | if (error) { |
b681072d | 469 | error_propagate(errp, error); |
ec9c10d2 | 470 | goto early_err; |
666daa68 MA |
471 | } |
472 | } | |
473 | ||
465bee1d PL |
474 | detect_zeroes = |
475 | parse_enum_option(BlockdevDetectZeroesOptions_lookup, | |
476 | qemu_opt_get(opts, "detect-zeroes"), | |
477 | BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX, | |
478 | BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF, | |
479 | &error); | |
480 | if (error) { | |
481 | error_propagate(errp, error); | |
482 | goto early_err; | |
483 | } | |
484 | ||
485 | if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP && | |
486 | !(bdrv_flags & BDRV_O_UNMAP)) { | |
487 | error_setg(errp, "setting detect-zeroes to unmap is not allowed " | |
488 | "without setting discard operation to unmap"); | |
489 | goto early_err; | |
490 | } | |
491 | ||
326642bc KW |
492 | /* init */ |
493 | dinfo = g_malloc0(sizeof(*dinfo)); | |
494 | dinfo->id = g_strdup(qemu_opts_id(opts)); | |
98522f63 KW |
495 | dinfo->bdrv = bdrv_new(dinfo->id, &error); |
496 | if (error) { | |
497 | error_propagate(errp, error); | |
498 | goto bdrv_new_err; | |
499 | } | |
80dd1aae KS |
500 | dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0; |
501 | dinfo->bdrv->read_only = ro; | |
465bee1d | 502 | dinfo->bdrv->detect_zeroes = detect_zeroes; |
84fb3925 | 503 | dinfo->refcount = 1; |
bb44619b KW |
504 | if (serial != NULL) { |
505 | dinfo->serial = g_strdup(serial); | |
506 | } | |
666daa68 MA |
507 | QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
508 | ||
abd7f68d MA |
509 | bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
510 | ||
0563e191 | 511 | /* disk I/O throttling */ |
cc0681c4 BC |
512 | if (throttle_enabled(&cfg)) { |
513 | bdrv_io_limits_enable(dinfo->bdrv); | |
514 | bdrv_set_io_limits(dinfo->bdrv, &cfg); | |
515 | } | |
0563e191 | 516 | |
dd5b0d71 | 517 | if (!file || !*file) { |
74fe54f2 | 518 | if (has_driver_specific_opts) { |
c2ad1b0c KW |
519 | file = NULL; |
520 | } else { | |
ec9c10d2 SH |
521 | QDECREF(bs_opts); |
522 | qemu_opts_del(opts); | |
c2ad1b0c KW |
523 | return dinfo; |
524 | } | |
666daa68 MA |
525 | } |
526 | if (snapshot) { | |
527 | /* always use cache=unsafe with snapshot */ | |
528 | bdrv_flags &= ~BDRV_O_CACHE_MASK; | |
529 | bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); | |
530 | } | |
531 | ||
fb0490f6 SH |
532 | if (copy_on_read) { |
533 | bdrv_flags |= BDRV_O_COPY_ON_READ; | |
534 | } | |
535 | ||
ed9d4205 BC |
536 | if (runstate_check(RUN_STATE_INMIGRATE)) { |
537 | bdrv_flags |= BDRV_O_INCOMING; | |
538 | } | |
539 | ||
666daa68 MA |
540 | bdrv_flags |= ro ? 0 : BDRV_O_RDWR; |
541 | ||
74fe54f2 | 542 | QINCREF(bs_opts); |
ddf5636d | 543 | ret = bdrv_open(&dinfo->bdrv, file, NULL, bs_opts, bdrv_flags, drv, &error); |
0006383e | 544 | |
666daa68 | 545 | if (ret < 0) { |
b681072d KW |
546 | error_setg(errp, "could not open disk image %s: %s", |
547 | file ?: dinfo->id, error_get_pretty(error)); | |
548 | error_free(error); | |
a9ae2bff | 549 | goto err; |
666daa68 MA |
550 | } |
551 | ||
552 | if (bdrv_key_required(dinfo->bdrv)) | |
553 | autostart = 0; | |
0006383e | 554 | |
74fe54f2 | 555 | QDECREF(bs_opts); |
0006383e KW |
556 | qemu_opts_del(opts); |
557 | ||
666daa68 | 558 | return dinfo; |
a9ae2bff MA |
559 | |
560 | err: | |
4f6fd349 | 561 | bdrv_unref(dinfo->bdrv); |
a9ae2bff | 562 | QTAILQ_REMOVE(&drives, dinfo, next); |
98522f63 KW |
563 | bdrv_new_err: |
564 | g_free(dinfo->id); | |
7267c094 | 565 | g_free(dinfo); |
ec9c10d2 | 566 | early_err: |
ec9c10d2 | 567 | qemu_opts_del(opts); |
6376f952 MA |
568 | err_no_opts: |
569 | QDECREF(bs_opts); | |
a9ae2bff | 570 | return NULL; |
666daa68 MA |
571 | } |
572 | ||
57975222 KW |
573 | static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to) |
574 | { | |
575 | const char *value; | |
576 | ||
577 | value = qemu_opt_get(opts, from); | |
578 | if (value) { | |
579 | qemu_opt_set(opts, to, value); | |
580 | qemu_opt_unset(opts, from); | |
581 | } | |
582 | } | |
583 | ||
33cb7dc8 KW |
584 | QemuOptsList qemu_legacy_drive_opts = { |
585 | .name = "drive", | |
586 | .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head), | |
587 | .desc = { | |
588 | { | |
87a899c5 KW |
589 | .name = "bus", |
590 | .type = QEMU_OPT_NUMBER, | |
591 | .help = "bus number", | |
592 | },{ | |
593 | .name = "unit", | |
594 | .type = QEMU_OPT_NUMBER, | |
595 | .help = "unit number (i.e. lun for scsi)", | |
596 | },{ | |
597 | .name = "index", | |
598 | .type = QEMU_OPT_NUMBER, | |
599 | .help = "index number", | |
600 | },{ | |
33cb7dc8 KW |
601 | .name = "media", |
602 | .type = QEMU_OPT_STRING, | |
603 | .help = "media type (disk, cdrom)", | |
593d464b KW |
604 | },{ |
605 | .name = "if", | |
606 | .type = QEMU_OPT_STRING, | |
607 | .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)", | |
b41a7338 KW |
608 | },{ |
609 | .name = "cyls", | |
610 | .type = QEMU_OPT_NUMBER, | |
611 | .help = "number of cylinders (ide disk geometry)", | |
612 | },{ | |
613 | .name = "heads", | |
614 | .type = QEMU_OPT_NUMBER, | |
615 | .help = "number of heads (ide disk geometry)", | |
616 | },{ | |
617 | .name = "secs", | |
618 | .type = QEMU_OPT_NUMBER, | |
619 | .help = "number of sectors (ide disk geometry)", | |
620 | },{ | |
621 | .name = "trans", | |
622 | .type = QEMU_OPT_STRING, | |
623 | .help = "chs translation (auto, lba, none)", | |
26929298 KW |
624 | },{ |
625 | .name = "boot", | |
626 | .type = QEMU_OPT_BOOL, | |
627 | .help = "(deprecated, ignored)", | |
394c7d4d KW |
628 | },{ |
629 | .name = "addr", | |
630 | .type = QEMU_OPT_STRING, | |
631 | .help = "pci address (virtio only)", | |
d095b465 HR |
632 | },{ |
633 | .name = "file", | |
634 | .type = QEMU_OPT_STRING, | |
635 | .help = "file name", | |
33cb7dc8 | 636 | }, |
0ebd24e0 KW |
637 | |
638 | /* Options that are passed on, but have special semantics with -drive */ | |
639 | { | |
640 | .name = "read-only", | |
641 | .type = QEMU_OPT_BOOL, | |
642 | .help = "open drive file as read-only", | |
ee13ed1c KW |
643 | },{ |
644 | .name = "rerror", | |
645 | .type = QEMU_OPT_STRING, | |
646 | .help = "read error action", | |
647 | },{ | |
648 | .name = "werror", | |
649 | .type = QEMU_OPT_STRING, | |
650 | .help = "write error action", | |
0ebd24e0 KW |
651 | },{ |
652 | .name = "copy-on-read", | |
653 | .type = QEMU_OPT_BOOL, | |
654 | .help = "copy read data from backing file into image file", | |
655 | }, | |
656 | ||
33cb7dc8 KW |
657 | { /* end of list */ } |
658 | }, | |
659 | }; | |
660 | ||
57975222 KW |
661 | DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) |
662 | { | |
29c4e2b5 | 663 | const char *value; |
33cb7dc8 | 664 | DriveInfo *dinfo = NULL; |
f298d071 | 665 | QDict *bs_opts; |
33cb7dc8 KW |
666 | QemuOpts *legacy_opts; |
667 | DriveMediaType media = MEDIA_DISK; | |
593d464b | 668 | BlockInterfaceType type; |
b41a7338 | 669 | int cyls, heads, secs, translation; |
87a899c5 | 670 | int max_devs, bus_id, unit_id, index; |
394c7d4d | 671 | const char *devaddr; |
ee13ed1c | 672 | const char *werror, *rerror; |
a7fdbcf0 FZ |
673 | bool read_only = false; |
674 | bool copy_on_read; | |
d095b465 | 675 | const char *filename; |
33cb7dc8 | 676 | Error *local_err = NULL; |
29c4e2b5 | 677 | |
57975222 KW |
678 | /* Change legacy command line options into QMP ones */ |
679 | qemu_opt_rename(all_opts, "iops", "throttling.iops-total"); | |
680 | qemu_opt_rename(all_opts, "iops_rd", "throttling.iops-read"); | |
681 | qemu_opt_rename(all_opts, "iops_wr", "throttling.iops-write"); | |
682 | ||
683 | qemu_opt_rename(all_opts, "bps", "throttling.bps-total"); | |
684 | qemu_opt_rename(all_opts, "bps_rd", "throttling.bps-read"); | |
685 | qemu_opt_rename(all_opts, "bps_wr", "throttling.bps-write"); | |
686 | ||
3e9fab69 BC |
687 | qemu_opt_rename(all_opts, "iops_max", "throttling.iops-total-max"); |
688 | qemu_opt_rename(all_opts, "iops_rd_max", "throttling.iops-read-max"); | |
689 | qemu_opt_rename(all_opts, "iops_wr_max", "throttling.iops-write-max"); | |
690 | ||
691 | qemu_opt_rename(all_opts, "bps_max", "throttling.bps-total-max"); | |
692 | qemu_opt_rename(all_opts, "bps_rd_max", "throttling.bps-read-max"); | |
693 | qemu_opt_rename(all_opts, "bps_wr_max", "throttling.bps-write-max"); | |
694 | ||
2024c1df BC |
695 | qemu_opt_rename(all_opts, |
696 | "iops_size", "throttling.iops-size"); | |
697 | ||
0f227a94 KW |
698 | qemu_opt_rename(all_opts, "readonly", "read-only"); |
699 | ||
29c4e2b5 KW |
700 | value = qemu_opt_get(all_opts, "cache"); |
701 | if (value) { | |
702 | int flags = 0; | |
703 | ||
704 | if (bdrv_parse_cache_flags(value, &flags) != 0) { | |
705 | error_report("invalid cache option"); | |
706 | return NULL; | |
707 | } | |
708 | ||
709 | /* Specific options take precedence */ | |
710 | if (!qemu_opt_get(all_opts, "cache.writeback")) { | |
711 | qemu_opt_set_bool(all_opts, "cache.writeback", | |
712 | !!(flags & BDRV_O_CACHE_WB)); | |
713 | } | |
714 | if (!qemu_opt_get(all_opts, "cache.direct")) { | |
715 | qemu_opt_set_bool(all_opts, "cache.direct", | |
716 | !!(flags & BDRV_O_NOCACHE)); | |
717 | } | |
718 | if (!qemu_opt_get(all_opts, "cache.no-flush")) { | |
719 | qemu_opt_set_bool(all_opts, "cache.no-flush", | |
720 | !!(flags & BDRV_O_NO_FLUSH)); | |
721 | } | |
722 | qemu_opt_unset(all_opts, "cache"); | |
723 | } | |
724 | ||
f298d071 KW |
725 | /* Get a QDict for processing the options */ |
726 | bs_opts = qdict_new(); | |
727 | qemu_opts_to_qdict(all_opts, bs_opts); | |
728 | ||
87ea75d5 PC |
729 | legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0, |
730 | &error_abort); | |
33cb7dc8 | 731 | qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err); |
84d18f06 | 732 | if (local_err) { |
e8817e7b | 733 | error_report("%s", error_get_pretty(local_err)); |
33cb7dc8 KW |
734 | error_free(local_err); |
735 | goto fail; | |
736 | } | |
737 | ||
26929298 KW |
738 | /* Deprecated option boot=[on|off] */ |
739 | if (qemu_opt_get(legacy_opts, "boot") != NULL) { | |
740 | fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be " | |
741 | "ignored. Future versions will reject this parameter. Please " | |
742 | "update your scripts.\n"); | |
743 | } | |
744 | ||
33cb7dc8 KW |
745 | /* Media type */ |
746 | value = qemu_opt_get(legacy_opts, "media"); | |
747 | if (value) { | |
748 | if (!strcmp(value, "disk")) { | |
749 | media = MEDIA_DISK; | |
750 | } else if (!strcmp(value, "cdrom")) { | |
751 | media = MEDIA_CDROM; | |
a7fdbcf0 | 752 | read_only = true; |
33cb7dc8 KW |
753 | } else { |
754 | error_report("'%s' invalid media", value); | |
755 | goto fail; | |
756 | } | |
757 | } | |
758 | ||
0ebd24e0 | 759 | /* copy-on-read is disabled with a warning for read-only devices */ |
a7fdbcf0 | 760 | read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false); |
0ebd24e0 KW |
761 | copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false); |
762 | ||
763 | if (read_only && copy_on_read) { | |
764 | error_report("warning: disabling copy-on-read on read-only drive"); | |
765 | copy_on_read = false; | |
766 | } | |
767 | ||
768 | qdict_put(bs_opts, "read-only", | |
769 | qstring_from_str(read_only ? "on" : "off")); | |
770 | qdict_put(bs_opts, "copy-on-read", | |
771 | qstring_from_str(copy_on_read ? "on" :"off")); | |
772 | ||
593d464b KW |
773 | /* Controller type */ |
774 | value = qemu_opt_get(legacy_opts, "if"); | |
775 | if (value) { | |
776 | for (type = 0; | |
777 | type < IF_COUNT && strcmp(value, if_name[type]); | |
778 | type++) { | |
779 | } | |
780 | if (type == IF_COUNT) { | |
781 | error_report("unsupported bus type '%s'", value); | |
782 | goto fail; | |
783 | } | |
784 | } else { | |
785 | type = block_default_type; | |
786 | } | |
787 | ||
b41a7338 KW |
788 | /* Geometry */ |
789 | cyls = qemu_opt_get_number(legacy_opts, "cyls", 0); | |
790 | heads = qemu_opt_get_number(legacy_opts, "heads", 0); | |
791 | secs = qemu_opt_get_number(legacy_opts, "secs", 0); | |
792 | ||
793 | if (cyls || heads || secs) { | |
794 | if (cyls < 1) { | |
795 | error_report("invalid physical cyls number"); | |
796 | goto fail; | |
797 | } | |
798 | if (heads < 1) { | |
799 | error_report("invalid physical heads number"); | |
800 | goto fail; | |
801 | } | |
802 | if (secs < 1) { | |
803 | error_report("invalid physical secs number"); | |
804 | goto fail; | |
805 | } | |
806 | } | |
807 | ||
808 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
809 | value = qemu_opt_get(legacy_opts, "trans"); | |
810 | if (value != NULL) { | |
811 | if (!cyls) { | |
812 | error_report("'%s' trans must be used with cyls, heads and secs", | |
813 | value); | |
814 | goto fail; | |
815 | } | |
816 | if (!strcmp(value, "none")) { | |
817 | translation = BIOS_ATA_TRANSLATION_NONE; | |
818 | } else if (!strcmp(value, "lba")) { | |
819 | translation = BIOS_ATA_TRANSLATION_LBA; | |
f31c41ff PB |
820 | } else if (!strcmp(value, "large")) { |
821 | translation = BIOS_ATA_TRANSLATION_LARGE; | |
822 | } else if (!strcmp(value, "rechs")) { | |
823 | translation = BIOS_ATA_TRANSLATION_RECHS; | |
b41a7338 KW |
824 | } else if (!strcmp(value, "auto")) { |
825 | translation = BIOS_ATA_TRANSLATION_AUTO; | |
826 | } else { | |
827 | error_report("'%s' invalid translation type", value); | |
828 | goto fail; | |
829 | } | |
830 | } | |
831 | ||
832 | if (media == MEDIA_CDROM) { | |
833 | if (cyls || secs || heads) { | |
834 | error_report("CHS can't be set with media=cdrom"); | |
835 | goto fail; | |
836 | } | |
837 | } | |
838 | ||
87a899c5 KW |
839 | /* Device address specified by bus/unit or index. |
840 | * If none was specified, try to find the first free one. */ | |
841 | bus_id = qemu_opt_get_number(legacy_opts, "bus", 0); | |
842 | unit_id = qemu_opt_get_number(legacy_opts, "unit", -1); | |
843 | index = qemu_opt_get_number(legacy_opts, "index", -1); | |
844 | ||
845 | max_devs = if_max_devs[type]; | |
846 | ||
847 | if (index != -1) { | |
848 | if (bus_id != 0 || unit_id != -1) { | |
849 | error_report("index cannot be used with bus and unit"); | |
850 | goto fail; | |
851 | } | |
852 | bus_id = drive_index_to_bus_id(type, index); | |
853 | unit_id = drive_index_to_unit_id(type, index); | |
854 | } | |
855 | ||
856 | if (unit_id == -1) { | |
857 | unit_id = 0; | |
858 | while (drive_get(type, bus_id, unit_id) != NULL) { | |
859 | unit_id++; | |
860 | if (max_devs && unit_id >= max_devs) { | |
861 | unit_id -= max_devs; | |
862 | bus_id++; | |
863 | } | |
864 | } | |
865 | } | |
866 | ||
867 | if (max_devs && unit_id >= max_devs) { | |
868 | error_report("unit %d too big (max is %d)", unit_id, max_devs - 1); | |
869 | goto fail; | |
870 | } | |
871 | ||
872 | if (drive_get(type, bus_id, unit_id) != NULL) { | |
873 | error_report("drive with bus=%d, unit=%d (index=%d) exists", | |
874 | bus_id, unit_id, index); | |
875 | goto fail; | |
876 | } | |
877 | ||
878 | /* no id supplied -> create one */ | |
879 | if (qemu_opts_id(all_opts) == NULL) { | |
880 | char *new_id; | |
881 | const char *mediastr = ""; | |
882 | if (type == IF_IDE || type == IF_SCSI) { | |
883 | mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; | |
884 | } | |
885 | if (max_devs) { | |
886 | new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id, | |
887 | mediastr, unit_id); | |
888 | } else { | |
889 | new_id = g_strdup_printf("%s%s%i", if_name[type], | |
890 | mediastr, unit_id); | |
891 | } | |
892 | qdict_put(bs_opts, "id", qstring_from_str(new_id)); | |
893 | g_free(new_id); | |
894 | } | |
895 | ||
394c7d4d KW |
896 | /* Add virtio block device */ |
897 | devaddr = qemu_opt_get(legacy_opts, "addr"); | |
898 | if (devaddr && type != IF_VIRTIO) { | |
899 | error_report("addr is not supported by this bus type"); | |
900 | goto fail; | |
901 | } | |
902 | ||
903 | if (type == IF_VIRTIO) { | |
904 | QemuOpts *devopts; | |
87ea75d5 PC |
905 | devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0, |
906 | &error_abort); | |
394c7d4d KW |
907 | if (arch_type == QEMU_ARCH_S390X) { |
908 | qemu_opt_set(devopts, "driver", "virtio-blk-s390"); | |
909 | } else { | |
910 | qemu_opt_set(devopts, "driver", "virtio-blk-pci"); | |
911 | } | |
912 | qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id")); | |
913 | if (devaddr) { | |
914 | qemu_opt_set(devopts, "addr", devaddr); | |
915 | } | |
916 | } | |
917 | ||
d095b465 HR |
918 | filename = qemu_opt_get(legacy_opts, "file"); |
919 | ||
ee13ed1c KW |
920 | /* Check werror/rerror compatibility with if=... */ |
921 | werror = qemu_opt_get(legacy_opts, "werror"); | |
922 | if (werror != NULL) { | |
923 | if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && | |
924 | type != IF_NONE) { | |
925 | error_report("werror is not supported by this bus type"); | |
926 | goto fail; | |
927 | } | |
928 | qdict_put(bs_opts, "werror", qstring_from_str(werror)); | |
929 | } | |
930 | ||
931 | rerror = qemu_opt_get(legacy_opts, "rerror"); | |
932 | if (rerror != NULL) { | |
933 | if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && | |
934 | type != IF_NONE) { | |
935 | error_report("rerror is not supported by this bus type"); | |
936 | goto fail; | |
937 | } | |
938 | qdict_put(bs_opts, "rerror", qstring_from_str(rerror)); | |
939 | } | |
940 | ||
2d246f01 | 941 | /* Actual block device init: Functionality shared with blockdev-add */ |
ee13ed1c | 942 | dinfo = blockdev_init(filename, bs_opts, &local_err); |
3cb0e25c | 943 | bs_opts = NULL; |
2d246f01 | 944 | if (dinfo == NULL) { |
84d18f06 | 945 | if (local_err) { |
e8817e7b | 946 | error_report("%s", error_get_pretty(local_err)); |
b681072d KW |
947 | error_free(local_err); |
948 | } | |
2d246f01 | 949 | goto fail; |
b681072d | 950 | } else { |
84d18f06 | 951 | assert(!local_err); |
2d246f01 KW |
952 | } |
953 | ||
954 | /* Set legacy DriveInfo fields */ | |
955 | dinfo->enable_auto_del = true; | |
f298d071 | 956 | dinfo->opts = all_opts; |
2d246f01 | 957 | |
b41a7338 KW |
958 | dinfo->cyls = cyls; |
959 | dinfo->heads = heads; | |
960 | dinfo->secs = secs; | |
961 | dinfo->trans = translation; | |
962 | ||
ee13ed1c | 963 | dinfo->type = type; |
87a899c5 KW |
964 | dinfo->bus = bus_id; |
965 | dinfo->unit = unit_id; | |
394c7d4d | 966 | dinfo->devaddr = devaddr; |
87a899c5 | 967 | |
e34ef046 KW |
968 | switch(type) { |
969 | case IF_IDE: | |
970 | case IF_SCSI: | |
971 | case IF_XEN: | |
972 | case IF_NONE: | |
973 | dinfo->media_cd = media == MEDIA_CDROM; | |
974 | break; | |
975 | default: | |
976 | break; | |
977 | } | |
978 | ||
2d246f01 | 979 | fail: |
33cb7dc8 | 980 | qemu_opts_del(legacy_opts); |
3cb0e25c | 981 | QDECREF(bs_opts); |
2d246f01 | 982 | return dinfo; |
57975222 KW |
983 | } |
984 | ||
666daa68 MA |
985 | void do_commit(Monitor *mon, const QDict *qdict) |
986 | { | |
666daa68 | 987 | const char *device = qdict_get_str(qdict, "device"); |
6ab4b5ab | 988 | BlockDriverState *bs; |
e8877497 | 989 | int ret; |
666daa68 | 990 | |
6ab4b5ab | 991 | if (!strcmp(device, "all")) { |
e8877497 | 992 | ret = bdrv_commit_all(); |
6ab4b5ab MA |
993 | } else { |
994 | bs = bdrv_find(device); | |
ac59eb95 | 995 | if (!bs) { |
58513bde | 996 | monitor_printf(mon, "Device '%s' not found\n", device); |
ac59eb95 | 997 | return; |
6ab4b5ab | 998 | } |
2d3735d3 | 999 | ret = bdrv_commit(bs); |
58513bde JC |
1000 | } |
1001 | if (ret < 0) { | |
1002 | monitor_printf(mon, "'commit' error for '%s': %s\n", device, | |
1003 | strerror(-ret)); | |
666daa68 MA |
1004 | } |
1005 | } | |
1006 | ||
6cc2a415 PB |
1007 | static void blockdev_do_action(int kind, void *data, Error **errp) |
1008 | { | |
c8a83e85 KW |
1009 | TransactionAction action; |
1010 | TransactionActionList list; | |
6cc2a415 PB |
1011 | |
1012 | action.kind = kind; | |
1013 | action.data = data; | |
1014 | list.value = &action; | |
1015 | list.next = NULL; | |
1016 | qmp_transaction(&list, errp); | |
1017 | } | |
1018 | ||
0901f67e BC |
1019 | void qmp_blockdev_snapshot_sync(bool has_device, const char *device, |
1020 | bool has_node_name, const char *node_name, | |
1021 | const char *snapshot_file, | |
1022 | bool has_snapshot_node_name, | |
1023 | const char *snapshot_node_name, | |
6106e249 | 1024 | bool has_format, const char *format, |
0901f67e | 1025 | bool has_mode, NewImageMode mode, Error **errp) |
f8882568 | 1026 | { |
6cc2a415 | 1027 | BlockdevSnapshot snapshot = { |
0901f67e | 1028 | .has_device = has_device, |
6cc2a415 | 1029 | .device = (char *) device, |
0901f67e BC |
1030 | .has_node_name = has_node_name, |
1031 | .node_name = (char *) node_name, | |
6cc2a415 | 1032 | .snapshot_file = (char *) snapshot_file, |
0901f67e BC |
1033 | .has_snapshot_node_name = has_snapshot_node_name, |
1034 | .snapshot_node_name = (char *) snapshot_node_name, | |
6cc2a415 PB |
1035 | .has_format = has_format, |
1036 | .format = (char *) format, | |
1037 | .has_mode = has_mode, | |
1038 | .mode = mode, | |
1039 | }; | |
c8a83e85 KW |
1040 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, |
1041 | &snapshot, errp); | |
f8882568 JS |
1042 | } |
1043 | ||
f323bc9e WX |
1044 | void qmp_blockdev_snapshot_internal_sync(const char *device, |
1045 | const char *name, | |
1046 | Error **errp) | |
1047 | { | |
1048 | BlockdevSnapshotInternal snapshot = { | |
1049 | .device = (char *) device, | |
1050 | .name = (char *) name | |
1051 | }; | |
1052 | ||
1053 | blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC, | |
1054 | &snapshot, errp); | |
1055 | } | |
1056 | ||
44e3e053 WX |
1057 | SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device, |
1058 | bool has_id, | |
1059 | const char *id, | |
1060 | bool has_name, | |
1061 | const char *name, | |
1062 | Error **errp) | |
1063 | { | |
1064 | BlockDriverState *bs = bdrv_find(device); | |
1065 | QEMUSnapshotInfo sn; | |
1066 | Error *local_err = NULL; | |
1067 | SnapshotInfo *info = NULL; | |
1068 | int ret; | |
1069 | ||
1070 | if (!bs) { | |
1071 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1072 | return NULL; | |
1073 | } | |
1074 | ||
1075 | if (!has_id) { | |
1076 | id = NULL; | |
1077 | } | |
1078 | ||
1079 | if (!has_name) { | |
1080 | name = NULL; | |
1081 | } | |
1082 | ||
1083 | if (!id && !name) { | |
1084 | error_setg(errp, "Name or id must be provided"); | |
1085 | return NULL; | |
1086 | } | |
1087 | ||
1088 | ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err); | |
84d18f06 | 1089 | if (local_err) { |
44e3e053 WX |
1090 | error_propagate(errp, local_err); |
1091 | return NULL; | |
1092 | } | |
1093 | if (!ret) { | |
1094 | error_setg(errp, | |
1095 | "Snapshot with id '%s' and name '%s' does not exist on " | |
1096 | "device '%s'", | |
1097 | STR_OR_NULL(id), STR_OR_NULL(name), device); | |
1098 | return NULL; | |
1099 | } | |
1100 | ||
1101 | bdrv_snapshot_delete(bs, id, name, &local_err); | |
84d18f06 | 1102 | if (local_err) { |
44e3e053 WX |
1103 | error_propagate(errp, local_err); |
1104 | return NULL; | |
1105 | } | |
1106 | ||
1107 | info = g_malloc0(sizeof(SnapshotInfo)); | |
1108 | info->id = g_strdup(sn.id_str); | |
1109 | info->name = g_strdup(sn.name); | |
1110 | info->date_nsec = sn.date_nsec; | |
1111 | info->date_sec = sn.date_sec; | |
1112 | info->vm_state_size = sn.vm_state_size; | |
1113 | info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000; | |
1114 | info->vm_clock_sec = sn.vm_clock_nsec / 1000000000; | |
1115 | ||
1116 | return info; | |
1117 | } | |
8802d1fd JC |
1118 | |
1119 | /* New and old BlockDriverState structs for group snapshots */ | |
ba0c86a3 | 1120 | |
ba5d6ab6 | 1121 | typedef struct BlkTransactionState BlkTransactionState; |
ba0c86a3 WX |
1122 | |
1123 | /* Only prepare() may fail. In a single transaction, only one of commit() or | |
1124 | abort() will be called, clean() will always be called if it present. */ | |
1125 | typedef struct BdrvActionOps { | |
1126 | /* Size of state struct, in bytes. */ | |
1127 | size_t instance_size; | |
1128 | /* Prepare the work, must NOT be NULL. */ | |
ba5d6ab6 | 1129 | void (*prepare)(BlkTransactionState *common, Error **errp); |
f9ea81e8 | 1130 | /* Commit the changes, can be NULL. */ |
ba5d6ab6 | 1131 | void (*commit)(BlkTransactionState *common); |
ba0c86a3 | 1132 | /* Abort the changes on fail, can be NULL. */ |
ba5d6ab6 | 1133 | void (*abort)(BlkTransactionState *common); |
ba0c86a3 | 1134 | /* Clean up resource in the end, can be NULL. */ |
ba5d6ab6 | 1135 | void (*clean)(BlkTransactionState *common); |
ba0c86a3 WX |
1136 | } BdrvActionOps; |
1137 | ||
1138 | /* | |
1139 | * This structure must be arranged as first member in child type, assuming | |
1140 | * that compiler will also arrange it to the same address with parent instance. | |
1141 | * Later it will be used in free(). | |
1142 | */ | |
ba5d6ab6 | 1143 | struct BlkTransactionState { |
c8a83e85 | 1144 | TransactionAction *action; |
ba0c86a3 | 1145 | const BdrvActionOps *ops; |
ba5d6ab6 | 1146 | QSIMPLEQ_ENTRY(BlkTransactionState) entry; |
ba0c86a3 WX |
1147 | }; |
1148 | ||
bbe86010 WX |
1149 | /* internal snapshot private data */ |
1150 | typedef struct InternalSnapshotState { | |
1151 | BlkTransactionState common; | |
1152 | BlockDriverState *bs; | |
1153 | QEMUSnapshotInfo sn; | |
1154 | } InternalSnapshotState; | |
1155 | ||
1156 | static void internal_snapshot_prepare(BlkTransactionState *common, | |
1157 | Error **errp) | |
1158 | { | |
f70edf99 | 1159 | Error *local_err = NULL; |
bbe86010 WX |
1160 | const char *device; |
1161 | const char *name; | |
1162 | BlockDriverState *bs; | |
1163 | QEMUSnapshotInfo old_sn, *sn; | |
1164 | bool ret; | |
1165 | qemu_timeval tv; | |
1166 | BlockdevSnapshotInternal *internal; | |
1167 | InternalSnapshotState *state; | |
1168 | int ret1; | |
1169 | ||
1170 | g_assert(common->action->kind == | |
1171 | TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC); | |
1172 | internal = common->action->blockdev_snapshot_internal_sync; | |
1173 | state = DO_UPCAST(InternalSnapshotState, common, common); | |
1174 | ||
1175 | /* 1. parse input */ | |
1176 | device = internal->device; | |
1177 | name = internal->name; | |
1178 | ||
1179 | /* 2. check for validation */ | |
1180 | bs = bdrv_find(device); | |
1181 | if (!bs) { | |
1182 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1183 | return; | |
1184 | } | |
1185 | ||
1186 | if (!bdrv_is_inserted(bs)) { | |
1187 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1188 | return; | |
1189 | } | |
1190 | ||
1191 | if (bdrv_is_read_only(bs)) { | |
1192 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1193 | return; | |
1194 | } | |
1195 | ||
1196 | if (!bdrv_can_snapshot(bs)) { | |
1197 | error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, | |
1198 | bs->drv->format_name, device, "internal snapshot"); | |
1199 | return; | |
1200 | } | |
1201 | ||
1202 | if (!strlen(name)) { | |
1203 | error_setg(errp, "Name is empty"); | |
1204 | return; | |
1205 | } | |
1206 | ||
1207 | /* check whether a snapshot with name exist */ | |
f70edf99 MA |
1208 | ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn, |
1209 | &local_err); | |
1210 | if (local_err) { | |
1211 | error_propagate(errp, local_err); | |
bbe86010 WX |
1212 | return; |
1213 | } else if (ret) { | |
1214 | error_setg(errp, | |
1215 | "Snapshot with name '%s' already exists on device '%s'", | |
1216 | name, device); | |
1217 | return; | |
1218 | } | |
1219 | ||
1220 | /* 3. take the snapshot */ | |
1221 | sn = &state->sn; | |
1222 | pstrcpy(sn->name, sizeof(sn->name), name); | |
1223 | qemu_gettimeofday(&tv); | |
1224 | sn->date_sec = tv.tv_sec; | |
1225 | sn->date_nsec = tv.tv_usec * 1000; | |
1226 | sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); | |
1227 | ||
1228 | ret1 = bdrv_snapshot_create(bs, sn); | |
1229 | if (ret1 < 0) { | |
1230 | error_setg_errno(errp, -ret1, | |
1231 | "Failed to create snapshot '%s' on device '%s'", | |
1232 | name, device); | |
1233 | return; | |
1234 | } | |
1235 | ||
1236 | /* 4. succeed, mark a snapshot is created */ | |
1237 | state->bs = bs; | |
1238 | } | |
1239 | ||
1240 | static void internal_snapshot_abort(BlkTransactionState *common) | |
1241 | { | |
1242 | InternalSnapshotState *state = | |
1243 | DO_UPCAST(InternalSnapshotState, common, common); | |
1244 | BlockDriverState *bs = state->bs; | |
1245 | QEMUSnapshotInfo *sn = &state->sn; | |
1246 | Error *local_error = NULL; | |
1247 | ||
1248 | if (!bs) { | |
1249 | return; | |
1250 | } | |
1251 | ||
1252 | if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) { | |
1253 | error_report("Failed to delete snapshot with id '%s' and name '%s' on " | |
1254 | "device '%s' in abort: %s", | |
1255 | sn->id_str, | |
1256 | sn->name, | |
1257 | bdrv_get_device_name(bs), | |
1258 | error_get_pretty(local_error)); | |
1259 | error_free(local_error); | |
1260 | } | |
1261 | } | |
1262 | ||
ba0c86a3 | 1263 | /* external snapshot private data */ |
ba5d6ab6 SH |
1264 | typedef struct ExternalSnapshotState { |
1265 | BlkTransactionState common; | |
8802d1fd JC |
1266 | BlockDriverState *old_bs; |
1267 | BlockDriverState *new_bs; | |
ba5d6ab6 | 1268 | } ExternalSnapshotState; |
8802d1fd | 1269 | |
ba5d6ab6 | 1270 | static void external_snapshot_prepare(BlkTransactionState *common, |
9b9877ee WX |
1271 | Error **errp) |
1272 | { | |
9b9877ee WX |
1273 | BlockDriver *drv; |
1274 | int flags, ret; | |
0901f67e | 1275 | QDict *options = NULL; |
9b9877ee | 1276 | Error *local_err = NULL; |
0901f67e | 1277 | bool has_device = false; |
e2a31e87 | 1278 | const char *device; |
0901f67e BC |
1279 | bool has_node_name = false; |
1280 | const char *node_name; | |
1281 | bool has_snapshot_node_name = false; | |
1282 | const char *snapshot_node_name; | |
e2a31e87 WX |
1283 | const char *new_image_file; |
1284 | const char *format = "qcow2"; | |
1285 | enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
ba5d6ab6 SH |
1286 | ExternalSnapshotState *state = |
1287 | DO_UPCAST(ExternalSnapshotState, common, common); | |
c8a83e85 | 1288 | TransactionAction *action = common->action; |
9b9877ee | 1289 | |
e2a31e87 | 1290 | /* get parameters */ |
c8a83e85 | 1291 | g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC); |
e2a31e87 | 1292 | |
0901f67e | 1293 | has_device = action->blockdev_snapshot_sync->has_device; |
e2a31e87 | 1294 | device = action->blockdev_snapshot_sync->device; |
0901f67e BC |
1295 | has_node_name = action->blockdev_snapshot_sync->has_node_name; |
1296 | node_name = action->blockdev_snapshot_sync->node_name; | |
1297 | has_snapshot_node_name = | |
1298 | action->blockdev_snapshot_sync->has_snapshot_node_name; | |
1299 | snapshot_node_name = action->blockdev_snapshot_sync->snapshot_node_name; | |
1300 | ||
e2a31e87 WX |
1301 | new_image_file = action->blockdev_snapshot_sync->snapshot_file; |
1302 | if (action->blockdev_snapshot_sync->has_format) { | |
1303 | format = action->blockdev_snapshot_sync->format; | |
1304 | } | |
1305 | if (action->blockdev_snapshot_sync->has_mode) { | |
1306 | mode = action->blockdev_snapshot_sync->mode; | |
1307 | } | |
1308 | ||
1309 | /* start processing */ | |
9b9877ee WX |
1310 | drv = bdrv_find_format(format); |
1311 | if (!drv) { | |
1312 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
1313 | return; | |
1314 | } | |
1315 | ||
0901f67e BC |
1316 | state->old_bs = bdrv_lookup_bs(has_device ? device : NULL, |
1317 | has_node_name ? node_name : NULL, | |
1318 | &local_err); | |
84d18f06 | 1319 | if (local_err) { |
0901f67e BC |
1320 | error_propagate(errp, local_err); |
1321 | return; | |
1322 | } | |
1323 | ||
1324 | if (has_node_name && !has_snapshot_node_name) { | |
1325 | error_setg(errp, "New snapshot node name missing"); | |
1326 | return; | |
1327 | } | |
1328 | ||
1329 | if (has_snapshot_node_name && bdrv_find_node(snapshot_node_name)) { | |
1330 | error_setg(errp, "New snapshot node name already existing"); | |
9b9877ee WX |
1331 | return; |
1332 | } | |
1333 | ||
ba5d6ab6 | 1334 | if (!bdrv_is_inserted(state->old_bs)) { |
9b9877ee WX |
1335 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1336 | return; | |
1337 | } | |
1338 | ||
3718d8ab FZ |
1339 | if (bdrv_op_is_blocked(state->old_bs, |
1340 | BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) { | |
9b9877ee WX |
1341 | return; |
1342 | } | |
1343 | ||
ba5d6ab6 SH |
1344 | if (!bdrv_is_read_only(state->old_bs)) { |
1345 | if (bdrv_flush(state->old_bs)) { | |
9b9877ee WX |
1346 | error_set(errp, QERR_IO_ERROR); |
1347 | return; | |
1348 | } | |
1349 | } | |
1350 | ||
212a5a8f | 1351 | if (!bdrv_is_first_non_filter(state->old_bs)) { |
f6186f49 BC |
1352 | error_set(errp, QERR_FEATURE_DISABLED, "snapshot"); |
1353 | return; | |
1354 | } | |
1355 | ||
ba5d6ab6 | 1356 | flags = state->old_bs->open_flags; |
9b9877ee | 1357 | |
9b9877ee WX |
1358 | /* create new image w/backing file */ |
1359 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
1360 | bdrv_img_create(new_image_file, format, | |
ba5d6ab6 SH |
1361 | state->old_bs->filename, |
1362 | state->old_bs->drv->format_name, | |
9b9877ee | 1363 | NULL, -1, flags, &local_err, false); |
84d18f06 | 1364 | if (local_err) { |
9b9877ee WX |
1365 | error_propagate(errp, local_err); |
1366 | return; | |
1367 | } | |
1368 | } | |
1369 | ||
0901f67e BC |
1370 | if (has_snapshot_node_name) { |
1371 | options = qdict_new(); | |
1372 | qdict_put(options, "node-name", | |
1373 | qstring_from_str(snapshot_node_name)); | |
1374 | } | |
1375 | ||
9b9877ee WX |
1376 | /* TODO Inherit bs->options or only take explicit options with an |
1377 | * extended QMP command? */ | |
f67503e5 | 1378 | assert(state->new_bs == NULL); |
ddf5636d | 1379 | ret = bdrv_open(&state->new_bs, new_image_file, NULL, options, |
34b5d2c6 | 1380 | flags | BDRV_O_NO_BACKING, drv, &local_err); |
f67503e5 | 1381 | /* We will manually add the backing_hd field to the bs later */ |
9b9877ee | 1382 | if (ret != 0) { |
34b5d2c6 | 1383 | error_propagate(errp, local_err); |
9b9877ee WX |
1384 | } |
1385 | } | |
1386 | ||
ba5d6ab6 | 1387 | static void external_snapshot_commit(BlkTransactionState *common) |
3b0047e8 | 1388 | { |
ba5d6ab6 SH |
1389 | ExternalSnapshotState *state = |
1390 | DO_UPCAST(ExternalSnapshotState, common, common); | |
ba0c86a3 | 1391 | |
ba5d6ab6 SH |
1392 | /* This removes our old bs and adds the new bs */ |
1393 | bdrv_append(state->new_bs, state->old_bs); | |
3b0047e8 WX |
1394 | /* We don't need (or want) to use the transactional |
1395 | * bdrv_reopen_multiple() across all the entries at once, because we | |
1396 | * don't want to abort all of them if one of them fails the reopen */ | |
ba5d6ab6 | 1397 | bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR, |
3b0047e8 WX |
1398 | NULL); |
1399 | } | |
1400 | ||
ba5d6ab6 | 1401 | static void external_snapshot_abort(BlkTransactionState *common) |
96b86bf7 | 1402 | { |
ba5d6ab6 SH |
1403 | ExternalSnapshotState *state = |
1404 | DO_UPCAST(ExternalSnapshotState, common, common); | |
1405 | if (state->new_bs) { | |
4f6fd349 | 1406 | bdrv_unref(state->new_bs); |
96b86bf7 WX |
1407 | } |
1408 | } | |
1409 | ||
3037f364 SH |
1410 | typedef struct DriveBackupState { |
1411 | BlkTransactionState common; | |
1412 | BlockDriverState *bs; | |
1413 | BlockJob *job; | |
1414 | } DriveBackupState; | |
1415 | ||
1416 | static void drive_backup_prepare(BlkTransactionState *common, Error **errp) | |
1417 | { | |
1418 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1419 | DriveBackup *backup; | |
1420 | Error *local_err = NULL; | |
1421 | ||
1422 | assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP); | |
1423 | backup = common->action->drive_backup; | |
1424 | ||
1425 | qmp_drive_backup(backup->device, backup->target, | |
1426 | backup->has_format, backup->format, | |
b53169ea | 1427 | backup->sync, |
3037f364 SH |
1428 | backup->has_mode, backup->mode, |
1429 | backup->has_speed, backup->speed, | |
1430 | backup->has_on_source_error, backup->on_source_error, | |
1431 | backup->has_on_target_error, backup->on_target_error, | |
1432 | &local_err); | |
84d18f06 | 1433 | if (local_err) { |
3037f364 SH |
1434 | error_propagate(errp, local_err); |
1435 | state->bs = NULL; | |
1436 | state->job = NULL; | |
1437 | return; | |
1438 | } | |
1439 | ||
1440 | state->bs = bdrv_find(backup->device); | |
1441 | state->job = state->bs->job; | |
1442 | } | |
1443 | ||
1444 | static void drive_backup_abort(BlkTransactionState *common) | |
1445 | { | |
1446 | DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common); | |
1447 | BlockDriverState *bs = state->bs; | |
1448 | ||
1449 | /* Only cancel if it's the job we started */ | |
1450 | if (bs && bs->job && bs->job == state->job) { | |
1451 | block_job_cancel_sync(bs->job); | |
1452 | } | |
1453 | } | |
1454 | ||
78b18b78 SH |
1455 | static void abort_prepare(BlkTransactionState *common, Error **errp) |
1456 | { | |
1457 | error_setg(errp, "Transaction aborted using Abort action"); | |
1458 | } | |
1459 | ||
1460 | static void abort_commit(BlkTransactionState *common) | |
1461 | { | |
dfc6f865 | 1462 | g_assert_not_reached(); /* this action never succeeds */ |
78b18b78 SH |
1463 | } |
1464 | ||
ba0c86a3 | 1465 | static const BdrvActionOps actions[] = { |
c8a83e85 | 1466 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = { |
ba5d6ab6 | 1467 | .instance_size = sizeof(ExternalSnapshotState), |
ba0c86a3 WX |
1468 | .prepare = external_snapshot_prepare, |
1469 | .commit = external_snapshot_commit, | |
1470 | .abort = external_snapshot_abort, | |
1471 | }, | |
3037f364 SH |
1472 | [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = { |
1473 | .instance_size = sizeof(DriveBackupState), | |
1474 | .prepare = drive_backup_prepare, | |
1475 | .abort = drive_backup_abort, | |
1476 | }, | |
78b18b78 SH |
1477 | [TRANSACTION_ACTION_KIND_ABORT] = { |
1478 | .instance_size = sizeof(BlkTransactionState), | |
1479 | .prepare = abort_prepare, | |
1480 | .commit = abort_commit, | |
1481 | }, | |
bbe86010 WX |
1482 | [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = { |
1483 | .instance_size = sizeof(InternalSnapshotState), | |
1484 | .prepare = internal_snapshot_prepare, | |
1485 | .abort = internal_snapshot_abort, | |
1486 | }, | |
ba0c86a3 WX |
1487 | }; |
1488 | ||
8802d1fd JC |
1489 | /* |
1490 | * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail | |
1491 | * then we do not pivot any of the devices in the group, and abandon the | |
1492 | * snapshots | |
1493 | */ | |
c8a83e85 | 1494 | void qmp_transaction(TransactionActionList *dev_list, Error **errp) |
8802d1fd | 1495 | { |
c8a83e85 | 1496 | TransactionActionList *dev_entry = dev_list; |
ba5d6ab6 | 1497 | BlkTransactionState *state, *next; |
43e17041 | 1498 | Error *local_err = NULL; |
8802d1fd | 1499 | |
ba5d6ab6 | 1500 | QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states; |
8802d1fd JC |
1501 | QSIMPLEQ_INIT(&snap_bdrv_states); |
1502 | ||
1503 | /* drain all i/o before any snapshots */ | |
1504 | bdrv_drain_all(); | |
1505 | ||
1506 | /* We don't do anything in this loop that commits us to the snapshot */ | |
1507 | while (NULL != dev_entry) { | |
c8a83e85 | 1508 | TransactionAction *dev_info = NULL; |
ba0c86a3 | 1509 | const BdrvActionOps *ops; |
52e7c241 | 1510 | |
8802d1fd JC |
1511 | dev_info = dev_entry->value; |
1512 | dev_entry = dev_entry->next; | |
1513 | ||
ba0c86a3 WX |
1514 | assert(dev_info->kind < ARRAY_SIZE(actions)); |
1515 | ||
1516 | ops = &actions[dev_info->kind]; | |
aa3fe714 HR |
1517 | assert(ops->instance_size > 0); |
1518 | ||
ba5d6ab6 SH |
1519 | state = g_malloc0(ops->instance_size); |
1520 | state->ops = ops; | |
1521 | state->action = dev_info; | |
1522 | QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry); | |
8802d1fd | 1523 | |
ba5d6ab6 | 1524 | state->ops->prepare(state, &local_err); |
84d18f06 | 1525 | if (local_err) { |
ba0c86a3 WX |
1526 | error_propagate(errp, local_err); |
1527 | goto delete_and_fail; | |
8802d1fd | 1528 | } |
8802d1fd JC |
1529 | } |
1530 | ||
ba5d6ab6 | 1531 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
f9ea81e8 SH |
1532 | if (state->ops->commit) { |
1533 | state->ops->commit(state); | |
1534 | } | |
8802d1fd JC |
1535 | } |
1536 | ||
1537 | /* success */ | |
1538 | goto exit; | |
1539 | ||
1540 | delete_and_fail: | |
1541 | /* | |
1542 | * failure, and it is all-or-none; abandon each new bs, and keep using | |
1543 | * the original bs for all images | |
1544 | */ | |
ba5d6ab6 SH |
1545 | QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) { |
1546 | if (state->ops->abort) { | |
1547 | state->ops->abort(state); | |
ba0c86a3 | 1548 | } |
8802d1fd JC |
1549 | } |
1550 | exit: | |
ba5d6ab6 SH |
1551 | QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) { |
1552 | if (state->ops->clean) { | |
1553 | state->ops->clean(state); | |
ba0c86a3 | 1554 | } |
ba5d6ab6 | 1555 | g_free(state); |
8802d1fd | 1556 | } |
8802d1fd JC |
1557 | } |
1558 | ||
1559 | ||
92d48558 | 1560 | static void eject_device(BlockDriverState *bs, int force, Error **errp) |
666daa68 | 1561 | { |
3718d8ab | 1562 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) { |
2d3735d3 SH |
1563 | return; |
1564 | } | |
2c6942fa | 1565 | if (!bdrv_dev_has_removable_media(bs)) { |
f231b88d CR |
1566 | error_setg(errp, "Device '%s' is not removable", |
1567 | bdrv_get_device_name(bs)); | |
92d48558 | 1568 | return; |
ea8f942f | 1569 | } |
92d48558 | 1570 | |
025ccaa7 PB |
1571 | if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) { |
1572 | bdrv_dev_eject_request(bs, force); | |
1573 | if (!force) { | |
f231b88d CR |
1574 | error_setg(errp, "Device '%s' is locked", |
1575 | bdrv_get_device_name(bs)); | |
92d48558 | 1576 | return; |
025ccaa7 | 1577 | } |
666daa68 | 1578 | } |
92d48558 | 1579 | |
3b5276b5 | 1580 | bdrv_close(bs); |
666daa68 MA |
1581 | } |
1582 | ||
c245b6a3 | 1583 | void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
666daa68 MA |
1584 | { |
1585 | BlockDriverState *bs; | |
666daa68 | 1586 | |
c245b6a3 | 1587 | bs = bdrv_find(device); |
666daa68 | 1588 | if (!bs) { |
c245b6a3 LC |
1589 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1590 | return; | |
92d48558 LC |
1591 | } |
1592 | ||
c245b6a3 | 1593 | eject_device(bs, force, errp); |
666daa68 MA |
1594 | } |
1595 | ||
12d3ba82 BC |
1596 | void qmp_block_passwd(bool has_device, const char *device, |
1597 | bool has_node_name, const char *node_name, | |
1598 | const char *password, Error **errp) | |
666daa68 | 1599 | { |
12d3ba82 | 1600 | Error *local_err = NULL; |
666daa68 MA |
1601 | BlockDriverState *bs; |
1602 | int err; | |
1603 | ||
12d3ba82 BC |
1604 | bs = bdrv_lookup_bs(has_device ? device : NULL, |
1605 | has_node_name ? node_name : NULL, | |
1606 | &local_err); | |
84d18f06 | 1607 | if (local_err) { |
12d3ba82 | 1608 | error_propagate(errp, local_err); |
a4dea8a9 | 1609 | return; |
666daa68 MA |
1610 | } |
1611 | ||
a4dea8a9 | 1612 | err = bdrv_set_key(bs, password); |
666daa68 | 1613 | if (err == -EINVAL) { |
a4dea8a9 LC |
1614 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
1615 | return; | |
666daa68 | 1616 | } else if (err < 0) { |
a4dea8a9 LC |
1617 | error_set(errp, QERR_INVALID_PASSWORD); |
1618 | return; | |
666daa68 | 1619 | } |
666daa68 MA |
1620 | } |
1621 | ||
333a96ec LC |
1622 | static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
1623 | int bdrv_flags, BlockDriver *drv, | |
1624 | const char *password, Error **errp) | |
1625 | { | |
34b5d2c6 | 1626 | Error *local_err = NULL; |
0eef407c LC |
1627 | int ret; |
1628 | ||
ddf5636d | 1629 | ret = bdrv_open(&bs, filename, NULL, NULL, bdrv_flags, drv, &local_err); |
0eef407c | 1630 | if (ret < 0) { |
34b5d2c6 | 1631 | error_propagate(errp, local_err); |
333a96ec LC |
1632 | return; |
1633 | } | |
1634 | ||
1635 | if (bdrv_key_required(bs)) { | |
1636 | if (password) { | |
1637 | if (bdrv_set_key(bs, password) < 0) { | |
1638 | error_set(errp, QERR_INVALID_PASSWORD); | |
1639 | } | |
1640 | } else { | |
1641 | error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), | |
1642 | bdrv_get_encrypted_filename(bs)); | |
1643 | } | |
1644 | } else if (password) { | |
1645 | error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); | |
1646 | } | |
1647 | } | |
1648 | ||
1649 | void qmp_change_blockdev(const char *device, const char *filename, | |
314f7ea7 | 1650 | const char *format, Error **errp) |
666daa68 MA |
1651 | { |
1652 | BlockDriverState *bs; | |
1653 | BlockDriver *drv = NULL; | |
1654 | int bdrv_flags; | |
92d48558 | 1655 | Error *err = NULL; |
666daa68 MA |
1656 | |
1657 | bs = bdrv_find(device); | |
1658 | if (!bs) { | |
333a96ec LC |
1659 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1660 | return; | |
666daa68 | 1661 | } |
333a96ec LC |
1662 | |
1663 | if (format) { | |
b64ec4e4 | 1664 | drv = bdrv_find_whitelisted_format(format, bs->read_only); |
666daa68 | 1665 | if (!drv) { |
333a96ec LC |
1666 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1667 | return; | |
666daa68 MA |
1668 | } |
1669 | } | |
333a96ec | 1670 | |
92d48558 | 1671 | eject_device(bs, 0, &err); |
84d18f06 | 1672 | if (err) { |
333a96ec LC |
1673 | error_propagate(errp, err); |
1674 | return; | |
666daa68 | 1675 | } |
333a96ec | 1676 | |
528f7663 | 1677 | bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR; |
199630b6 | 1678 | bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0; |
333a96ec LC |
1679 | |
1680 | qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp); | |
666daa68 | 1681 | } |
9063f814 | 1682 | |
727f005e | 1683 | /* throttling disk I/O limits */ |
80047da5 | 1684 | void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
3e9fab69 BC |
1685 | int64_t bps_wr, |
1686 | int64_t iops, | |
1687 | int64_t iops_rd, | |
1688 | int64_t iops_wr, | |
1689 | bool has_bps_max, | |
1690 | int64_t bps_max, | |
1691 | bool has_bps_rd_max, | |
1692 | int64_t bps_rd_max, | |
1693 | bool has_bps_wr_max, | |
1694 | int64_t bps_wr_max, | |
1695 | bool has_iops_max, | |
1696 | int64_t iops_max, | |
1697 | bool has_iops_rd_max, | |
1698 | int64_t iops_rd_max, | |
1699 | bool has_iops_wr_max, | |
2024c1df BC |
1700 | int64_t iops_wr_max, |
1701 | bool has_iops_size, | |
1702 | int64_t iops_size, Error **errp) | |
727f005e | 1703 | { |
cc0681c4 | 1704 | ThrottleConfig cfg; |
727f005e ZYW |
1705 | BlockDriverState *bs; |
1706 | ||
80047da5 | 1707 | bs = bdrv_find(device); |
727f005e | 1708 | if (!bs) { |
80047da5 LC |
1709 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1710 | return; | |
727f005e ZYW |
1711 | } |
1712 | ||
cc0681c4 BC |
1713 | memset(&cfg, 0, sizeof(cfg)); |
1714 | cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps; | |
1715 | cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd; | |
1716 | cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr; | |
1717 | ||
1718 | cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops; | |
1719 | cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd; | |
1720 | cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr; | |
1721 | ||
3e9fab69 BC |
1722 | if (has_bps_max) { |
1723 | cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max; | |
1724 | } | |
1725 | if (has_bps_rd_max) { | |
1726 | cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max; | |
1727 | } | |
1728 | if (has_bps_wr_max) { | |
1729 | cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max; | |
1730 | } | |
1731 | if (has_iops_max) { | |
1732 | cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max; | |
1733 | } | |
1734 | if (has_iops_rd_max) { | |
1735 | cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max; | |
1736 | } | |
1737 | if (has_iops_wr_max) { | |
1738 | cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max; | |
1739 | } | |
727f005e | 1740 | |
2024c1df BC |
1741 | if (has_iops_size) { |
1742 | cfg.op_size = iops_size; | |
1743 | } | |
cc0681c4 BC |
1744 | |
1745 | if (!check_throttle_config(&cfg, errp)) { | |
80047da5 | 1746 | return; |
727f005e ZYW |
1747 | } |
1748 | ||
cc0681c4 | 1749 | if (!bs->io_limits_enabled && throttle_enabled(&cfg)) { |
727f005e | 1750 | bdrv_io_limits_enable(bs); |
cc0681c4 | 1751 | } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) { |
727f005e | 1752 | bdrv_io_limits_disable(bs); |
cc0681c4 BC |
1753 | } |
1754 | ||
1755 | if (bs->io_limits_enabled) { | |
1756 | bdrv_set_io_limits(bs, &cfg); | |
727f005e | 1757 | } |
727f005e ZYW |
1758 | } |
1759 | ||
9063f814 RH |
1760 | int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
1761 | { | |
1762 | const char *id = qdict_get_str(qdict, "id"); | |
1763 | BlockDriverState *bs; | |
3718d8ab | 1764 | Error *local_err = NULL; |
9063f814 RH |
1765 | |
1766 | bs = bdrv_find(id); | |
1767 | if (!bs) { | |
b1422f20 | 1768 | error_report("Device '%s' not found", id); |
9063f814 RH |
1769 | return -1; |
1770 | } | |
3718d8ab FZ |
1771 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) { |
1772 | error_report("%s", error_get_pretty(local_err)); | |
1773 | error_free(local_err); | |
8591675f MT |
1774 | return -1; |
1775 | } | |
9063f814 RH |
1776 | |
1777 | /* quiesce block driver; prevent further io */ | |
922453bc | 1778 | bdrv_drain_all(); |
9063f814 RH |
1779 | bdrv_flush(bs); |
1780 | bdrv_close(bs); | |
1781 | ||
fa879d62 | 1782 | /* if we have a device attached to this BlockDriverState |
d22b2f41 RH |
1783 | * then we need to make the drive anonymous until the device |
1784 | * can be removed. If this is a drive with no device backing | |
1785 | * then we can just get rid of the block driver state right here. | |
1786 | */ | |
fa879d62 | 1787 | if (bdrv_get_attached_dev(bs)) { |
d22b2f41 | 1788 | bdrv_make_anon(bs); |
293c51a6 SH |
1789 | |
1790 | /* Further I/O must not pause the guest */ | |
1791 | bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT, | |
1792 | BLOCKDEV_ON_ERROR_REPORT); | |
d22b2f41 RH |
1793 | } else { |
1794 | drive_uninit(drive_get_by_blockdev(bs)); | |
9063f814 RH |
1795 | } |
1796 | ||
9063f814 RH |
1797 | return 0; |
1798 | } | |
6d4a2b3a | 1799 | |
3b1dbd11 BC |
1800 | void qmp_block_resize(bool has_device, const char *device, |
1801 | bool has_node_name, const char *node_name, | |
1802 | int64_t size, Error **errp) | |
6d4a2b3a | 1803 | { |
3b1dbd11 | 1804 | Error *local_err = NULL; |
6d4a2b3a | 1805 | BlockDriverState *bs; |
8732901e | 1806 | int ret; |
6d4a2b3a | 1807 | |
3b1dbd11 BC |
1808 | bs = bdrv_lookup_bs(has_device ? device : NULL, |
1809 | has_node_name ? node_name : NULL, | |
1810 | &local_err); | |
84d18f06 | 1811 | if (local_err) { |
3b1dbd11 BC |
1812 | error_propagate(errp, local_err); |
1813 | return; | |
1814 | } | |
1815 | ||
1816 | if (!bdrv_is_first_non_filter(bs)) { | |
1817 | error_set(errp, QERR_FEATURE_DISABLED, "resize"); | |
5e7caacb | 1818 | return; |
6d4a2b3a CH |
1819 | } |
1820 | ||
1821 | if (size < 0) { | |
939a1cc3 | 1822 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
5e7caacb | 1823 | return; |
6d4a2b3a CH |
1824 | } |
1825 | ||
92b7a08d PL |
1826 | /* complete all in-flight operations before resizing the device */ |
1827 | bdrv_drain_all(); | |
1828 | ||
8732901e KW |
1829 | ret = bdrv_truncate(bs, size); |
1830 | switch (ret) { | |
939a1cc3 SH |
1831 | case 0: |
1832 | break; | |
1833 | case -ENOMEDIUM: | |
1834 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
1835 | break; | |
1836 | case -ENOTSUP: | |
1837 | error_set(errp, QERR_UNSUPPORTED); | |
1838 | break; | |
1839 | case -EACCES: | |
1840 | error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); | |
1841 | break; | |
1842 | case -EBUSY: | |
1843 | error_set(errp, QERR_DEVICE_IN_USE, device); | |
1844 | break; | |
1845 | default: | |
8732901e | 1846 | error_setg_errno(errp, -ret, "Could not resize"); |
939a1cc3 | 1847 | break; |
6d4a2b3a | 1848 | } |
6d4a2b3a | 1849 | } |
12bd451f | 1850 | |
9abf2dba | 1851 | static void block_job_cb(void *opaque, int ret) |
12bd451f SH |
1852 | { |
1853 | BlockDriverState *bs = opaque; | |
1854 | QObject *obj; | |
1855 | ||
9abf2dba | 1856 | trace_block_job_cb(bs, bs->job, ret); |
12bd451f SH |
1857 | |
1858 | assert(bs->job); | |
1859 | obj = qobject_from_block_job(bs->job); | |
1860 | if (ret < 0) { | |
1861 | QDict *dict = qobject_to_qdict(obj); | |
1862 | qdict_put(dict, "error", qstring_from_str(strerror(-ret))); | |
1863 | } | |
1864 | ||
370521a1 SH |
1865 | if (block_job_is_cancelled(bs->job)) { |
1866 | monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); | |
1867 | } else { | |
1868 | monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); | |
1869 | } | |
12bd451f | 1870 | qobject_decref(obj); |
aa398a5c | 1871 | |
fa510ebf | 1872 | bdrv_put_ref_bh_schedule(bs); |
12bd451f SH |
1873 | } |
1874 | ||
1875 | void qmp_block_stream(const char *device, bool has_base, | |
1d809098 PB |
1876 | const char *base, bool has_speed, int64_t speed, |
1877 | bool has_on_error, BlockdevOnError on_error, | |
1878 | Error **errp) | |
12bd451f SH |
1879 | { |
1880 | BlockDriverState *bs; | |
c8c3080f | 1881 | BlockDriverState *base_bs = NULL; |
fd7f8c65 | 1882 | Error *local_err = NULL; |
12bd451f | 1883 | |
1d809098 PB |
1884 | if (!has_on_error) { |
1885 | on_error = BLOCKDEV_ON_ERROR_REPORT; | |
1886 | } | |
1887 | ||
12bd451f SH |
1888 | bs = bdrv_find(device); |
1889 | if (!bs) { | |
1890 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1891 | return; | |
1892 | } | |
1893 | ||
628ff683 FZ |
1894 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) { |
1895 | return; | |
1896 | } | |
1897 | ||
12bd451f | 1898 | if (base) { |
c8c3080f MT |
1899 | base_bs = bdrv_find_backing_image(bs, base); |
1900 | if (base_bs == NULL) { | |
1901 | error_set(errp, QERR_BASE_NOT_FOUND, base); | |
1902 | return; | |
1903 | } | |
12bd451f SH |
1904 | } |
1905 | ||
c83c66c3 | 1906 | stream_start(bs, base_bs, base, has_speed ? speed : 0, |
1d809098 | 1907 | on_error, block_job_cb, bs, &local_err); |
84d18f06 | 1908 | if (local_err) { |
fd7f8c65 SH |
1909 | error_propagate(errp, local_err); |
1910 | return; | |
12bd451f SH |
1911 | } |
1912 | ||
1913 | trace_qmp_block_stream(bs, bs->job); | |
1914 | } | |
2d47c6e9 | 1915 | |
ed61fc10 JC |
1916 | void qmp_block_commit(const char *device, |
1917 | bool has_base, const char *base, const char *top, | |
1918 | bool has_speed, int64_t speed, | |
1919 | Error **errp) | |
1920 | { | |
1921 | BlockDriverState *bs; | |
1922 | BlockDriverState *base_bs, *top_bs; | |
1923 | Error *local_err = NULL; | |
1924 | /* This will be part of the QMP command, if/when the | |
1925 | * BlockdevOnError change for blkmirror makes it in | |
1926 | */ | |
92aa5c6d | 1927 | BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
ed61fc10 | 1928 | |
54504663 HR |
1929 | if (!has_speed) { |
1930 | speed = 0; | |
1931 | } | |
1932 | ||
ed61fc10 JC |
1933 | /* drain all i/o before commits */ |
1934 | bdrv_drain_all(); | |
1935 | ||
1936 | bs = bdrv_find(device); | |
1937 | if (!bs) { | |
1938 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
1939 | return; | |
628ff683 FZ |
1940 | } |
1941 | ||
1942 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT, errp)) { | |
1943 | return; | |
ed61fc10 | 1944 | } |
ed61fc10 JC |
1945 | |
1946 | /* default top_bs is the active layer */ | |
1947 | top_bs = bs; | |
1948 | ||
1949 | if (top) { | |
1950 | if (strcmp(bs->filename, top) != 0) { | |
1951 | top_bs = bdrv_find_backing_image(bs, top); | |
1952 | } | |
1953 | } | |
1954 | ||
1955 | if (top_bs == NULL) { | |
1956 | error_setg(errp, "Top image file %s not found", top ? top : "NULL"); | |
1957 | return; | |
1958 | } | |
1959 | ||
d5208c45 JC |
1960 | if (has_base && base) { |
1961 | base_bs = bdrv_find_backing_image(top_bs, base); | |
1962 | } else { | |
1963 | base_bs = bdrv_find_base(top_bs); | |
1964 | } | |
1965 | ||
1966 | if (base_bs == NULL) { | |
1967 | error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL"); | |
1968 | return; | |
1969 | } | |
1970 | ||
20a63d2c FZ |
1971 | if (top_bs == bs) { |
1972 | commit_active_start(bs, base_bs, speed, on_error, block_job_cb, | |
1973 | bs, &local_err); | |
1974 | } else { | |
1975 | commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, | |
1976 | &local_err); | |
1977 | } | |
ed61fc10 JC |
1978 | if (local_err != NULL) { |
1979 | error_propagate(errp, local_err); | |
1980 | return; | |
1981 | } | |
ed61fc10 JC |
1982 | } |
1983 | ||
99a9addf SH |
1984 | void qmp_drive_backup(const char *device, const char *target, |
1985 | bool has_format, const char *format, | |
b53169ea | 1986 | enum MirrorSyncMode sync, |
99a9addf SH |
1987 | bool has_mode, enum NewImageMode mode, |
1988 | bool has_speed, int64_t speed, | |
1989 | bool has_on_source_error, BlockdevOnError on_source_error, | |
1990 | bool has_on_target_error, BlockdevOnError on_target_error, | |
1991 | Error **errp) | |
1992 | { | |
1993 | BlockDriverState *bs; | |
1994 | BlockDriverState *target_bs; | |
fc5d3f84 | 1995 | BlockDriverState *source = NULL; |
99a9addf SH |
1996 | BlockDriver *drv = NULL; |
1997 | Error *local_err = NULL; | |
1998 | int flags; | |
1999 | int64_t size; | |
2000 | int ret; | |
2001 | ||
2002 | if (!has_speed) { | |
2003 | speed = 0; | |
2004 | } | |
2005 | if (!has_on_source_error) { | |
2006 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2007 | } | |
2008 | if (!has_on_target_error) { | |
2009 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2010 | } | |
2011 | if (!has_mode) { | |
2012 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
2013 | } | |
2014 | ||
2015 | bs = bdrv_find(device); | |
2016 | if (!bs) { | |
2017 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
2018 | return; | |
2019 | } | |
2020 | ||
2021 | if (!bdrv_is_inserted(bs)) { | |
2022 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
2023 | return; | |
2024 | } | |
2025 | ||
2026 | if (!has_format) { | |
2027 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
2028 | } | |
2029 | if (format) { | |
2030 | drv = bdrv_find_format(format); | |
2031 | if (!drv) { | |
2032 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
2033 | return; | |
2034 | } | |
2035 | } | |
2036 | ||
3718d8ab | 2037 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) { |
99a9addf SH |
2038 | return; |
2039 | } | |
2040 | ||
2041 | flags = bs->open_flags | BDRV_O_RDWR; | |
2042 | ||
fc5d3f84 IM |
2043 | /* See if we have a backing HD we can use to create our new image |
2044 | * on top of. */ | |
2045 | if (sync == MIRROR_SYNC_MODE_TOP) { | |
2046 | source = bs->backing_hd; | |
2047 | if (!source) { | |
2048 | sync = MIRROR_SYNC_MODE_FULL; | |
2049 | } | |
2050 | } | |
2051 | if (sync == MIRROR_SYNC_MODE_NONE) { | |
2052 | source = bs; | |
2053 | } | |
2054 | ||
99a9addf SH |
2055 | size = bdrv_getlength(bs); |
2056 | if (size < 0) { | |
2057 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2058 | return; | |
2059 | } | |
2060 | ||
2061 | if (mode != NEW_IMAGE_MODE_EXISTING) { | |
2062 | assert(format && drv); | |
fc5d3f84 IM |
2063 | if (source) { |
2064 | bdrv_img_create(target, format, source->filename, | |
2065 | source->drv->format_name, NULL, | |
2066 | size, flags, &local_err, false); | |
2067 | } else { | |
2068 | bdrv_img_create(target, format, NULL, NULL, NULL, | |
2069 | size, flags, &local_err, false); | |
2070 | } | |
99a9addf SH |
2071 | } |
2072 | ||
84d18f06 | 2073 | if (local_err) { |
99a9addf SH |
2074 | error_propagate(errp, local_err); |
2075 | return; | |
2076 | } | |
2077 | ||
f67503e5 | 2078 | target_bs = NULL; |
ddf5636d | 2079 | ret = bdrv_open(&target_bs, target, NULL, NULL, flags, drv, &local_err); |
99a9addf | 2080 | if (ret < 0) { |
34b5d2c6 | 2081 | error_propagate(errp, local_err); |
99a9addf SH |
2082 | return; |
2083 | } | |
2084 | ||
fc5d3f84 | 2085 | backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error, |
99a9addf SH |
2086 | block_job_cb, bs, &local_err); |
2087 | if (local_err != NULL) { | |
4f6fd349 | 2088 | bdrv_unref(target_bs); |
99a9addf SH |
2089 | error_propagate(errp, local_err); |
2090 | return; | |
2091 | } | |
99a9addf SH |
2092 | } |
2093 | ||
c13163fb BC |
2094 | BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp) |
2095 | { | |
2096 | return bdrv_named_nodes_list(); | |
2097 | } | |
2098 | ||
08e4ed6c PB |
2099 | #define DEFAULT_MIRROR_BUF_SIZE (10 << 20) |
2100 | ||
d9b902db PB |
2101 | void qmp_drive_mirror(const char *device, const char *target, |
2102 | bool has_format, const char *format, | |
2103 | enum MirrorSyncMode sync, | |
2104 | bool has_mode, enum NewImageMode mode, | |
b952b558 | 2105 | bool has_speed, int64_t speed, |
eee13dfe | 2106 | bool has_granularity, uint32_t granularity, |
08e4ed6c | 2107 | bool has_buf_size, int64_t buf_size, |
b952b558 PB |
2108 | bool has_on_source_error, BlockdevOnError on_source_error, |
2109 | bool has_on_target_error, BlockdevOnError on_target_error, | |
2110 | Error **errp) | |
d9b902db | 2111 | { |
d9b902db PB |
2112 | BlockDriverState *bs; |
2113 | BlockDriverState *source, *target_bs; | |
d9b902db PB |
2114 | BlockDriver *drv = NULL; |
2115 | Error *local_err = NULL; | |
2116 | int flags; | |
ac3c5d83 | 2117 | int64_t size; |
d9b902db PB |
2118 | int ret; |
2119 | ||
2120 | if (!has_speed) { | |
2121 | speed = 0; | |
2122 | } | |
b952b558 PB |
2123 | if (!has_on_source_error) { |
2124 | on_source_error = BLOCKDEV_ON_ERROR_REPORT; | |
2125 | } | |
2126 | if (!has_on_target_error) { | |
2127 | on_target_error = BLOCKDEV_ON_ERROR_REPORT; | |
2128 | } | |
d9b902db PB |
2129 | if (!has_mode) { |
2130 | mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; | |
2131 | } | |
eee13dfe PB |
2132 | if (!has_granularity) { |
2133 | granularity = 0; | |
2134 | } | |
08e4ed6c PB |
2135 | if (!has_buf_size) { |
2136 | buf_size = DEFAULT_MIRROR_BUF_SIZE; | |
2137 | } | |
2138 | ||
eee13dfe PB |
2139 | if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
2140 | error_set(errp, QERR_INVALID_PARAMETER, device); | |
2141 | return; | |
2142 | } | |
2143 | if (granularity & (granularity - 1)) { | |
2144 | error_set(errp, QERR_INVALID_PARAMETER, device); | |
2145 | return; | |
2146 | } | |
d9b902db PB |
2147 | |
2148 | bs = bdrv_find(device); | |
2149 | if (!bs) { | |
2150 | error_set(errp, QERR_DEVICE_NOT_FOUND, device); | |
2151 | return; | |
2152 | } | |
2153 | ||
2154 | if (!bdrv_is_inserted(bs)) { | |
2155 | error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); | |
2156 | return; | |
2157 | } | |
2158 | ||
2159 | if (!has_format) { | |
2160 | format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name; | |
2161 | } | |
2162 | if (format) { | |
2163 | drv = bdrv_find_format(format); | |
2164 | if (!drv) { | |
2165 | error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); | |
2166 | return; | |
2167 | } | |
2168 | } | |
2169 | ||
3718d8ab | 2170 | if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) { |
d9b902db PB |
2171 | return; |
2172 | } | |
2173 | ||
2174 | flags = bs->open_flags | BDRV_O_RDWR; | |
2175 | source = bs->backing_hd; | |
2176 | if (!source && sync == MIRROR_SYNC_MODE_TOP) { | |
2177 | sync = MIRROR_SYNC_MODE_FULL; | |
2178 | } | |
117e0c82 HR |
2179 | if (sync == MIRROR_SYNC_MODE_NONE) { |
2180 | source = bs; | |
2181 | } | |
d9b902db | 2182 | |
ac3c5d83 SH |
2183 | size = bdrv_getlength(bs); |
2184 | if (size < 0) { | |
2185 | error_setg_errno(errp, -size, "bdrv_getlength failed"); | |
2186 | return; | |
2187 | } | |
2188 | ||
14526864 HR |
2189 | if ((sync == MIRROR_SYNC_MODE_FULL || !source) |
2190 | && mode != NEW_IMAGE_MODE_EXISTING) | |
2191 | { | |
d9b902db PB |
2192 | /* create new image w/o backing file */ |
2193 | assert(format && drv); | |
cf8f2426 | 2194 | bdrv_img_create(target, format, |
f382d43a | 2195 | NULL, NULL, NULL, size, flags, &local_err, false); |
d9b902db PB |
2196 | } else { |
2197 | switch (mode) { | |
2198 | case NEW_IMAGE_MODE_EXISTING: | |
d9b902db PB |
2199 | break; |
2200 | case NEW_IMAGE_MODE_ABSOLUTE_PATHS: | |
2201 | /* create new image with backing file */ | |
cf8f2426 LC |
2202 | bdrv_img_create(target, format, |
2203 | source->filename, | |
2204 | source->drv->format_name, | |
f382d43a | 2205 | NULL, size, flags, &local_err, false); |
d9b902db PB |
2206 | break; |
2207 | default: | |
2208 | abort(); | |
2209 | } | |
2210 | } | |
2211 | ||
84d18f06 | 2212 | if (local_err) { |
cf8f2426 | 2213 | error_propagate(errp, local_err); |
d9b902db PB |
2214 | return; |
2215 | } | |
2216 | ||
b812f671 PB |
2217 | /* Mirroring takes care of copy-on-write using the source's backing |
2218 | * file. | |
2219 | */ | |
f67503e5 | 2220 | target_bs = NULL; |
ddf5636d HR |
2221 | ret = bdrv_open(&target_bs, target, NULL, NULL, flags | BDRV_O_NO_BACKING, |
2222 | drv, &local_err); | |
d9b902db | 2223 | if (ret < 0) { |
34b5d2c6 | 2224 | error_propagate(errp, local_err); |
d9b902db PB |
2225 | return; |
2226 | } | |
2227 | ||
08e4ed6c | 2228 | mirror_start(bs, target_bs, speed, granularity, buf_size, sync, |
eee13dfe | 2229 | on_source_error, on_target_error, |
b952b558 | 2230 | block_job_cb, bs, &local_err); |
d9b902db | 2231 | if (local_err != NULL) { |
4f6fd349 | 2232 | bdrv_unref(target_bs); |
d9b902db PB |
2233 | error_propagate(errp, local_err); |
2234 | return; | |
2235 | } | |
d9b902db PB |
2236 | } |
2237 | ||
2d47c6e9 SH |
2238 | static BlockJob *find_block_job(const char *device) |
2239 | { | |
2240 | BlockDriverState *bs; | |
2241 | ||
2242 | bs = bdrv_find(device); | |
2243 | if (!bs || !bs->job) { | |
2244 | return NULL; | |
2245 | } | |
2246 | return bs->job; | |
2247 | } | |
2248 | ||
882ec7ce | 2249 | void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
2d47c6e9 SH |
2250 | { |
2251 | BlockJob *job = find_block_job(device); | |
2252 | ||
2253 | if (!job) { | |
7ef15070 | 2254 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
2d47c6e9 SH |
2255 | return; |
2256 | } | |
2257 | ||
882ec7ce | 2258 | block_job_set_speed(job, speed, errp); |
2d47c6e9 | 2259 | } |
370521a1 | 2260 | |
6e37fb81 PB |
2261 | void qmp_block_job_cancel(const char *device, |
2262 | bool has_force, bool force, Error **errp) | |
370521a1 SH |
2263 | { |
2264 | BlockJob *job = find_block_job(device); | |
2265 | ||
6e37fb81 PB |
2266 | if (!has_force) { |
2267 | force = false; | |
2268 | } | |
2269 | ||
370521a1 | 2270 | if (!job) { |
7ef15070 | 2271 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
370521a1 SH |
2272 | return; |
2273 | } | |
6e37fb81 | 2274 | if (job->paused && !force) { |
f231b88d CR |
2275 | error_setg(errp, "The block job for device '%s' is currently paused", |
2276 | device); | |
8acc72a4 PB |
2277 | return; |
2278 | } | |
370521a1 SH |
2279 | |
2280 | trace_qmp_block_job_cancel(job); | |
2281 | block_job_cancel(job); | |
2282 | } | |
fb5458cd | 2283 | |
6e37fb81 PB |
2284 | void qmp_block_job_pause(const char *device, Error **errp) |
2285 | { | |
2286 | BlockJob *job = find_block_job(device); | |
2287 | ||
2288 | if (!job) { | |
2289 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
2290 | return; | |
2291 | } | |
2292 | ||
2293 | trace_qmp_block_job_pause(job); | |
2294 | block_job_pause(job); | |
2295 | } | |
2296 | ||
2297 | void qmp_block_job_resume(const char *device, Error **errp) | |
2298 | { | |
2299 | BlockJob *job = find_block_job(device); | |
2300 | ||
2301 | if (!job) { | |
2302 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
2303 | return; | |
2304 | } | |
2305 | ||
2306 | trace_qmp_block_job_resume(job); | |
2307 | block_job_resume(job); | |
2308 | } | |
2309 | ||
aeae883b PB |
2310 | void qmp_block_job_complete(const char *device, Error **errp) |
2311 | { | |
2312 | BlockJob *job = find_block_job(device); | |
2313 | ||
2314 | if (!job) { | |
2315 | error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); | |
2316 | return; | |
2317 | } | |
2318 | ||
2319 | trace_qmp_block_job_complete(job); | |
2320 | block_job_complete(job, errp); | |
2321 | } | |
2322 | ||
d26c9a15 KW |
2323 | void qmp_blockdev_add(BlockdevOptions *options, Error **errp) |
2324 | { | |
2325 | QmpOutputVisitor *ov = qmp_output_visitor_new(); | |
8ae8e904 | 2326 | DriveInfo *dinfo; |
d26c9a15 KW |
2327 | QObject *obj; |
2328 | QDict *qdict; | |
d26c9a15 KW |
2329 | Error *local_err = NULL; |
2330 | ||
2331 | /* Require an ID in the top level */ | |
2332 | if (!options->has_id) { | |
2333 | error_setg(errp, "Block device needs an ID"); | |
2334 | goto fail; | |
2335 | } | |
2336 | ||
2337 | /* TODO Sort it out in raw-posix and drive_init: Reject aio=native with | |
2338 | * cache.direct=false instead of silently switching to aio=threads, except | |
2339 | * if called from drive_init. | |
2340 | * | |
2341 | * For now, simply forbidding the combination for all drivers will do. */ | |
2342 | if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) { | |
c6e0bd9b KW |
2343 | bool direct = options->has_cache && |
2344 | options->cache->has_direct && | |
2345 | options->cache->direct; | |
2346 | if (!direct) { | |
d26c9a15 KW |
2347 | error_setg(errp, "aio=native requires cache.direct=true"); |
2348 | goto fail; | |
2349 | } | |
2350 | } | |
2351 | ||
2352 | visit_type_BlockdevOptions(qmp_output_get_visitor(ov), | |
2353 | &options, NULL, &local_err); | |
84d18f06 | 2354 | if (local_err) { |
d26c9a15 KW |
2355 | error_propagate(errp, local_err); |
2356 | goto fail; | |
2357 | } | |
2358 | ||
2359 | obj = qmp_output_get_qobject(ov); | |
2360 | qdict = qobject_to_qdict(obj); | |
2361 | ||
2362 | qdict_flatten(qdict); | |
2363 | ||
8ae8e904 | 2364 | dinfo = blockdev_init(NULL, qdict, &local_err); |
84d18f06 | 2365 | if (local_err) { |
b681072d | 2366 | error_propagate(errp, local_err); |
d26c9a15 KW |
2367 | goto fail; |
2368 | } | |
2369 | ||
8ae8e904 KW |
2370 | if (bdrv_key_required(dinfo->bdrv)) { |
2371 | drive_uninit(dinfo); | |
2372 | error_setg(errp, "blockdev-add doesn't support encrypted devices"); | |
2373 | goto fail; | |
2374 | } | |
2375 | ||
d26c9a15 KW |
2376 | fail: |
2377 | qmp_output_visitor_cleanup(ov); | |
2378 | } | |
2379 | ||
fb5458cd SH |
2380 | static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
2381 | { | |
2382 | BlockJobInfoList **prev = opaque; | |
2383 | BlockJob *job = bs->job; | |
2384 | ||
2385 | if (job) { | |
30e628b7 PB |
2386 | BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1); |
2387 | elem->value = block_job_query(bs->job); | |
fb5458cd SH |
2388 | (*prev)->next = elem; |
2389 | *prev = elem; | |
2390 | } | |
2391 | } | |
2392 | ||
2393 | BlockJobInfoList *qmp_query_block_jobs(Error **errp) | |
2394 | { | |
2395 | /* Dummy is a fake list element for holding the head pointer */ | |
2396 | BlockJobInfoList dummy = {}; | |
2397 | BlockJobInfoList *prev = &dummy; | |
2398 | bdrv_iterate(do_qmp_query_block_jobs_one, &prev); | |
2399 | return dummy.next; | |
2400 | } | |
4d454574 | 2401 | |
0006383e | 2402 | QemuOptsList qemu_common_drive_opts = { |
4d454574 | 2403 | .name = "drive", |
0006383e | 2404 | .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
4d454574 PB |
2405 | .desc = { |
2406 | { | |
4d454574 PB |
2407 | .name = "snapshot", |
2408 | .type = QEMU_OPT_BOOL, | |
2409 | .help = "enable/disable snapshot mode", | |
a9384aff PB |
2410 | },{ |
2411 | .name = "discard", | |
2412 | .type = QEMU_OPT_STRING, | |
2413 | .help = "discard operation (ignore/off, unmap/on)", | |
4d454574 | 2414 | },{ |
29c4e2b5 KW |
2415 | .name = "cache.writeback", |
2416 | .type = QEMU_OPT_BOOL, | |
2417 | .help = "enables writeback mode for any caches", | |
2418 | },{ | |
2419 | .name = "cache.direct", | |
2420 | .type = QEMU_OPT_BOOL, | |
2421 | .help = "enables use of O_DIRECT (bypass the host page cache)", | |
2422 | },{ | |
2423 | .name = "cache.no-flush", | |
2424 | .type = QEMU_OPT_BOOL, | |
2425 | .help = "ignore any flush requests for the device", | |
4d454574 PB |
2426 | },{ |
2427 | .name = "aio", | |
2428 | .type = QEMU_OPT_STRING, | |
2429 | .help = "host AIO implementation (threads, native)", | |
2430 | },{ | |
2431 | .name = "format", | |
2432 | .type = QEMU_OPT_STRING, | |
2433 | .help = "disk format (raw, qcow2, ...)", | |
2434 | },{ | |
2435 | .name = "serial", | |
2436 | .type = QEMU_OPT_STRING, | |
2437 | .help = "disk serial number", | |
2438 | },{ | |
2439 | .name = "rerror", | |
2440 | .type = QEMU_OPT_STRING, | |
2441 | .help = "read error action", | |
2442 | },{ | |
2443 | .name = "werror", | |
2444 | .type = QEMU_OPT_STRING, | |
2445 | .help = "write error action", | |
4d454574 | 2446 | },{ |
0f227a94 | 2447 | .name = "read-only", |
4d454574 PB |
2448 | .type = QEMU_OPT_BOOL, |
2449 | .help = "open drive file as read-only", | |
2450 | },{ | |
57975222 | 2451 | .name = "throttling.iops-total", |
4d454574 PB |
2452 | .type = QEMU_OPT_NUMBER, |
2453 | .help = "limit total I/O operations per second", | |
2454 | },{ | |
57975222 | 2455 | .name = "throttling.iops-read", |
4d454574 PB |
2456 | .type = QEMU_OPT_NUMBER, |
2457 | .help = "limit read operations per second", | |
2458 | },{ | |
57975222 | 2459 | .name = "throttling.iops-write", |
4d454574 PB |
2460 | .type = QEMU_OPT_NUMBER, |
2461 | .help = "limit write operations per second", | |
2462 | },{ | |
57975222 | 2463 | .name = "throttling.bps-total", |
4d454574 PB |
2464 | .type = QEMU_OPT_NUMBER, |
2465 | .help = "limit total bytes per second", | |
2466 | },{ | |
57975222 | 2467 | .name = "throttling.bps-read", |
4d454574 PB |
2468 | .type = QEMU_OPT_NUMBER, |
2469 | .help = "limit read bytes per second", | |
2470 | },{ | |
57975222 | 2471 | .name = "throttling.bps-write", |
4d454574 PB |
2472 | .type = QEMU_OPT_NUMBER, |
2473 | .help = "limit write bytes per second", | |
3e9fab69 BC |
2474 | },{ |
2475 | .name = "throttling.iops-total-max", | |
2476 | .type = QEMU_OPT_NUMBER, | |
2477 | .help = "I/O operations burst", | |
2478 | },{ | |
2479 | .name = "throttling.iops-read-max", | |
2480 | .type = QEMU_OPT_NUMBER, | |
2481 | .help = "I/O operations read burst", | |
2482 | },{ | |
2483 | .name = "throttling.iops-write-max", | |
2484 | .type = QEMU_OPT_NUMBER, | |
2485 | .help = "I/O operations write burst", | |
2486 | },{ | |
2487 | .name = "throttling.bps-total-max", | |
2488 | .type = QEMU_OPT_NUMBER, | |
2489 | .help = "total bytes burst", | |
2490 | },{ | |
2491 | .name = "throttling.bps-read-max", | |
2492 | .type = QEMU_OPT_NUMBER, | |
2493 | .help = "total bytes read burst", | |
2494 | },{ | |
2495 | .name = "throttling.bps-write-max", | |
2496 | .type = QEMU_OPT_NUMBER, | |
2497 | .help = "total bytes write burst", | |
2024c1df BC |
2498 | },{ |
2499 | .name = "throttling.iops-size", | |
2500 | .type = QEMU_OPT_NUMBER, | |
2501 | .help = "when limiting by iops max size of an I/O in bytes", | |
4d454574 PB |
2502 | },{ |
2503 | .name = "copy-on-read", | |
2504 | .type = QEMU_OPT_BOOL, | |
2505 | .help = "copy read data from backing file into image file", | |
465bee1d PL |
2506 | },{ |
2507 | .name = "detect-zeroes", | |
2508 | .type = QEMU_OPT_STRING, | |
2509 | .help = "try to optimize zero writes (off, on, unmap)", | |
4d454574 PB |
2510 | }, |
2511 | { /* end of list */ } | |
2512 | }, | |
2513 | }; | |
0006383e KW |
2514 | |
2515 | QemuOptsList qemu_drive_opts = { | |
2516 | .name = "drive", | |
2517 | .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), | |
2518 | .desc = { | |
492fdc6f KW |
2519 | /* |
2520 | * no elements => accept any params | |
2521 | * validation will happen later | |
2522 | */ | |
0006383e KW |
2523 | { /* end of list */ } |
2524 | }, | |
2525 | }; |