blob: 0a0226bca16b1d26670cb25cf074b001249df3cd [file] [log] [blame]
Markus Armbruster666daa62010-06-02 18:48:27 +02001/*
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.
Markus Armbruster3618a092013-03-14 13:59:53 +01008 *
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.
Markus Armbruster666daa62010-06-02 18:48:27 +020031 */
32
Peter Maydelld38ea872016-01-29 17:50:05 +000033#include "qemu/osdep.h"
Markus Armbruster26f54e92014-10-07 13:59:04 +020034#include "sysemu/block-backend.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010035#include "sysemu/blockdev.h"
Paolo Bonzini0d09e412013-02-05 17:06:20 +010036#include "hw/block/block.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010037#include "block/blockjob.h"
Alberto Garcia76f4afb2015-06-08 18:17:44 +020038#include "block/throttle-groups.h"
Paolo Bonzini83c90892012-12-17 18:19:49 +010039#include "monitor/monitor.h"
Markus Armbrusterd49b6832015-03-17 18:29:20 +010040#include "qemu/error-report.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010041#include "qemu/option.h"
42#include "qemu/config-file.h"
Paolo Bonzini7b1b5d12012-12-17 18:19:43 +010043#include "qapi/qmp/types.h"
Kevin Wolfd26c9a12013-09-23 15:26:03 +020044#include "qapi-visit.h"
Markus Armbrustercc7a8ea2015-03-17 17:22:46 +010045#include "qapi/qmp/qerror.h"
Daniel P. Berrangeb3db2112016-09-30 15:45:27 +010046#include "qapi/qobject-output-visitor.h"
Peter Lieven9e7dac72014-08-13 19:20:17 +020047#include "qapi/util.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010048#include "sysemu/sysemu.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010049#include "block/block_int.h"
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -020050#include "qmp-commands.h"
Daniel P. Berrange0ab8ed12017-01-25 16:14:15 +000051#include "block/trace.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010052#include "sysemu/arch_init.h"
Veronia Bahaaf348b6d2016-03-20 19:16:19 +020053#include "qemu/cutils.h"
54#include "qemu/help_option.h"
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +010055#include "qemu/throttle-options.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020056
Max Reitz9c4218e2016-01-29 16:36:12 +010057static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
58 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
59
Kevin Wolfb33945c2016-09-20 13:38:43 +020060static int do_open_tray(const char *blk_name, const char *qdev_id,
61 bool force, Error **errp);
Colin Lordbf18bee2016-06-06 14:15:22 -040062
Markus Armbruster19609662011-01-28 11:21:39 +010063static const char *const if_name[IF_COUNT] = {
64 [IF_NONE] = "none",
65 [IF_IDE] = "ide",
66 [IF_SCSI] = "scsi",
67 [IF_FLOPPY] = "floppy",
68 [IF_PFLASH] = "pflash",
69 [IF_MTD] = "mtd",
70 [IF_SD] = "sd",
71 [IF_VIRTIO] = "virtio",
72 [IF_XEN] = "xen",
73};
74
John Snow21dff8c2014-10-01 14:19:25 -040075static int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010076 /*
77 * Do not change these numbers! They govern how drive option
78 * index maps to unit and bus. That mapping is ABI.
79 *
Wei Jiangang547cb152016-04-26 18:12:43 +080080 * All controllers used to implement if=T drives need to support
Markus Armbruster27d6bf42011-01-28 11:21:40 +010081 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
82 * Otherwise, some index values map to "impossible" bus, unit
83 * values.
84 *
85 * For instance, if you change [IF_SCSI] to 255, -drive
86 * if=scsi,index=12 no longer means bus=1,unit=5, but
87 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
88 * the drive can't be set up. Regression.
89 */
90 [IF_IDE] = 2,
91 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +010092};
93
John Snow21dff8c2014-10-01 14:19:25 -040094/**
95 * Boards may call this to offer board-by-board overrides
96 * of the default, global values.
97 */
98void override_max_devs(BlockInterfaceType type, int max_devs)
99{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200100 BlockBackend *blk;
John Snow21dff8c2014-10-01 14:19:25 -0400101 DriveInfo *dinfo;
102
103 if (max_devs <= 0) {
104 return;
105 }
106
Markus Armbruster18e46a02014-10-07 13:59:06 +0200107 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
108 dinfo = blk_legacy_dinfo(blk);
John Snow21dff8c2014-10-01 14:19:25 -0400109 if (dinfo->type == type) {
110 fprintf(stderr, "Cannot override units-per-bus property of"
111 " the %s interface, because a drive of that type has"
112 " already been added.\n", if_name[type]);
113 g_assert_not_reached();
114 }
115 }
116
117 if_max_devs[type] = max_devs;
118}
119
Markus Armbruster14bafc52010-06-25 08:09:10 +0200120/*
121 * We automatically delete the drive when a device using it gets
122 * unplugged. Questionable feature, but we can't just drop it.
123 * Device models call blockdev_mark_auto_del() to schedule the
124 * automatic deletion, and generic qdev code calls blockdev_auto_del()
125 * when deletion is actually safe.
126 */
Markus Armbruster4be74632014-10-07 13:59:18 +0200127void blockdev_mark_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200128{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200129 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster4be74632014-10-07 13:59:18 +0200130 BlockDriverState *bs = blk_bs(blk);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100131 AioContext *aio_context;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200132
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200133 if (!dinfo) {
Kevin Wolf2d246f02013-09-18 15:14:47 +0200134 return;
135 }
136
Max Reitz5433c242015-10-19 17:53:29 +0200137 if (bs) {
138 aio_context = bdrv_get_aio_context(bs);
139 aio_context_acquire(aio_context);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100140
Max Reitz5433c242015-10-19 17:53:29 +0200141 if (bs->job) {
142 block_job_cancel(bs->job);
143 }
144
145 aio_context_release(aio_context);
Paolo Bonzini12bde0e2012-03-30 13:17:10 +0200146 }
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100147
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200148 dinfo->auto_del = 1;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200149}
150
Markus Armbruster4be74632014-10-07 13:59:18 +0200151void blockdev_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200152{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200153 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200154
Ryan Harper0fc0f1f2010-12-08 10:05:00 -0600155 if (dinfo && dinfo->auto_del) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100156 monitor_remove_blk(blk);
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +0200157 blk_unref(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200158 }
159}
160
John Snowd8f94e12014-10-01 14:19:27 -0400161/**
162 * Returns the current mapping of how many units per bus
163 * a particular interface can support.
164 *
165 * A positive integer indicates n units per bus.
166 * 0 implies the mapping has not been established.
167 * -1 indicates an invalid BlockInterfaceType was given.
168 */
169int drive_get_max_devs(BlockInterfaceType type)
170{
171 if (type >= IF_IDE && type < IF_COUNT) {
172 return if_max_devs[type];
173 }
174
175 return -1;
176}
177
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100178static int drive_index_to_bus_id(BlockInterfaceType type, int index)
179{
180 int max_devs = if_max_devs[type];
181 return max_devs ? index / max_devs : 0;
182}
183
184static int drive_index_to_unit_id(BlockInterfaceType type, int index)
185{
186 int max_devs = if_max_devs[type];
187 return max_devs ? index % max_devs : index;
188}
189
Markus Armbruster2292dda2011-01-28 11:21:41 +0100190QemuOpts *drive_def(const char *optstr)
191{
Markus Armbruster70b94332015-02-13 12:50:26 +0100192 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100193}
194
195QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100196 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200197{
Markus Armbruster666daa62010-06-02 18:48:27 +0200198 QemuOpts *opts;
199
Markus Armbruster2292dda2011-01-28 11:21:41 +0100200 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200201 if (!opts) {
202 return NULL;
203 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100204 if (type != IF_DEFAULT) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100205 qemu_opt_set(opts, "if", if_name[type], &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100206 }
207 if (index >= 0) {
Markus Armbrustera8b18f82015-02-13 15:50:43 +0100208 qemu_opt_set_number(opts, "index", index, &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100209 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200210 if (file)
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100211 qemu_opt_set(opts, "file", file, &error_abort);
Markus Armbruster666daa62010-06-02 18:48:27 +0200212 return opts;
213}
214
215DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
216{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200217 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200218 DriveInfo *dinfo;
219
Markus Armbruster18e46a02014-10-07 13:59:06 +0200220 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
221 dinfo = blk_legacy_dinfo(blk);
222 if (dinfo && dinfo->type == type
223 && dinfo->bus == bus && dinfo->unit == unit) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200224 return dinfo;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200225 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200226 }
227
228 return NULL;
229}
230
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100231void drive_check_orphaned(void)
John Snowa66c9dc2014-10-01 14:19:24 -0400232{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200233 BlockBackend *blk;
John Snowa66c9dc2014-10-01 14:19:24 -0400234 DriveInfo *dinfo;
Markus Armbruster664cc622017-02-15 11:05:45 +0100235 Location loc;
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100236 bool orphans = false;
John Snowa66c9dc2014-10-01 14:19:24 -0400237
Markus Armbruster18e46a02014-10-07 13:59:06 +0200238 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
239 dinfo = blk_legacy_dinfo(blk);
Markus Armbrustera7f53e22014-10-07 13:59:25 +0200240 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
John Snowa66c9dc2014-10-01 14:19:24 -0400241 dinfo->type != IF_NONE) {
Markus Armbruster664cc622017-02-15 11:05:45 +0100242 loc_push_none(&loc);
243 qemu_opts_loc_restore(dinfo->opts);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100244 error_report("machine type does not support"
Markus Armbruster664cc622017-02-15 11:05:45 +0100245 " if=%s,bus=%d,unit=%d",
246 if_name[dinfo->type], dinfo->bus, dinfo->unit);
247 loc_pop(&loc);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100248 orphans = true;
John Snowa66c9dc2014-10-01 14:19:24 -0400249 }
250 }
251
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100252 if (orphans) {
253 exit(1);
254 }
John Snowa66c9dc2014-10-01 14:19:24 -0400255}
256
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100257DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
258{
259 return drive_get(type,
260 drive_index_to_bus_id(type, index),
261 drive_index_to_unit_id(type, index));
262}
263
Markus Armbruster666daa62010-06-02 18:48:27 +0200264int drive_get_max_bus(BlockInterfaceType type)
265{
266 int max_bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200267 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200268 DriveInfo *dinfo;
269
270 max_bus = -1;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200271 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
272 dinfo = blk_legacy_dinfo(blk);
273 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200274 max_bus = dinfo->bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200275 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200276 }
277 return max_bus;
278}
279
Markus Armbruster13839972011-01-28 11:21:37 +0100280/* Get a block device. This should only be used for single-drive devices
281 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
282 appropriate bus. */
283DriveInfo *drive_get_next(BlockInterfaceType type)
284{
285 static int next_block_unit[IF_COUNT];
286
287 return drive_get(type, 0, next_block_unit[type]++);
288}
289
Markus Armbruster666daa62010-06-02 18:48:27 +0200290static void bdrv_format_print(void *opaque, const char *name)
291{
Markus Armbruster807105a2011-01-17 19:31:27 +0100292 error_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200293}
294
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000295typedef struct {
296 QEMUBH *bh;
Fam Zhengfa510eb2013-08-23 09:14:51 +0800297 BlockDriverState *bs;
298} BDRVPutRefBH;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000299
Kevin Wolfb6810722013-09-20 11:33:11 +0200300static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200301{
302 if (!strcmp(buf, "ignore")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200303 return BLOCKDEV_ON_ERROR_IGNORE;
Markus Armbruster666daa62010-06-02 18:48:27 +0200304 } else if (!is_read && !strcmp(buf, "enospc")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200305 return BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200306 } else if (!strcmp(buf, "stop")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200307 return BLOCKDEV_ON_ERROR_STOP;
Markus Armbruster666daa62010-06-02 18:48:27 +0200308 } else if (!strcmp(buf, "report")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200309 return BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200310 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200311 error_setg(errp, "'%s' invalid %s error action",
312 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200313 return -1;
314 }
315}
316
Alberto Garcia40119ef2015-11-16 11:28:38 +0200317static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
318 Error **errp)
319{
320 const QListEntry *entry;
321 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
322 switch (qobject_type(entry->value)) {
323
324 case QTYPE_QSTRING: {
325 unsigned long long length;
326 const char *str = qstring_get_str(qobject_to_qstring(entry->value));
327 if (parse_uint_full(str, &length, 10) == 0 &&
328 length > 0 && length <= UINT_MAX) {
329 block_acct_add_interval(stats, (unsigned) length);
330 } else {
331 error_setg(errp, "Invalid interval length: %s", str);
332 return false;
333 }
334 break;
335 }
336
337 case QTYPE_QINT: {
338 int64_t length = qint_get_int(qobject_to_qint(entry->value));
339 if (length > 0 && length <= UINT_MAX) {
340 block_acct_add_interval(stats, (unsigned) length);
341 } else {
342 error_setg(errp, "Invalid interval length: %" PRId64, length);
343 return false;
344 }
345 break;
346 }
347
348 default:
349 error_setg(errp, "The specification of stats-intervals is invalid");
350 return false;
351 }
352 }
353 return true;
354}
355
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200356typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
357
Max Reitzfbf81752015-10-19 17:53:31 +0200358/* All parameters but @opts are optional and may be set to NULL. */
359static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
360 const char **throttling_group, ThrottleConfig *throttle_cfg,
361 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
362{
Max Reitzfbf81752015-10-19 17:53:31 +0200363 Error *local_error = NULL;
364 const char *aio;
365
366 if (bdrv_flags) {
Max Reitzfbf81752015-10-19 17:53:31 +0200367 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
368 *bdrv_flags |= BDRV_O_COPY_ON_READ;
369 }
370
Max Reitzfbf81752015-10-19 17:53:31 +0200371 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
372 if (!strcmp(aio, "native")) {
373 *bdrv_flags |= BDRV_O_NATIVE_AIO;
374 } else if (!strcmp(aio, "threads")) {
375 /* this is the default */
376 } else {
377 error_setg(errp, "invalid aio option");
378 return;
379 }
380 }
381 }
382
383 /* disk I/O throttling */
384 if (throttling_group) {
385 *throttling_group = qemu_opt_get(opts, "throttling.group");
386 }
387
388 if (throttle_cfg) {
Alberto Garcia1588ab52016-02-18 12:27:00 +0200389 throttle_config_init(throttle_cfg);
Max Reitzfbf81752015-10-19 17:53:31 +0200390 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
391 qemu_opt_get_number(opts, "throttling.bps-total", 0);
392 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
393 qemu_opt_get_number(opts, "throttling.bps-read", 0);
394 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
395 qemu_opt_get_number(opts, "throttling.bps-write", 0);
396 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
397 qemu_opt_get_number(opts, "throttling.iops-total", 0);
398 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
399 qemu_opt_get_number(opts, "throttling.iops-read", 0);
400 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
401 qemu_opt_get_number(opts, "throttling.iops-write", 0);
402
403 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
404 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
405 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
406 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
407 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
408 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
409 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
410 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
411 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
412 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
413 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
414 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
415
Alberto Garcia8a0fc182016-02-18 12:27:02 +0200416 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
417 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
418 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
419 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
420 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
421 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
422 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
423 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
424 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
425 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
426 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
427 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
428
Max Reitzfbf81752015-10-19 17:53:31 +0200429 throttle_cfg->op_size =
430 qemu_opt_get_number(opts, "throttling.iops-size", 0);
431
Alberto Garciad5851082016-02-18 12:26:59 +0200432 if (!throttle_is_valid(throttle_cfg, errp)) {
Max Reitzfbf81752015-10-19 17:53:31 +0200433 return;
434 }
435 }
436
437 if (detect_zeroes) {
438 *detect_zeroes =
439 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
440 qemu_opt_get(opts, "detect-zeroes"),
Eric Blake7fb1cf12015-11-18 01:52:57 -0700441 BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
Max Reitzfbf81752015-10-19 17:53:31 +0200442 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
443 &local_error);
444 if (local_error) {
445 error_propagate(errp, local_error);
446 return;
447 }
Max Reitzfbf81752015-10-19 17:53:31 +0200448 }
449}
450
Kevin Wolff298d072013-09-10 12:01:20 +0200451/* Takes the ownership of bs_opts */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200452static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
453 Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200454{
455 const char *buf;
Markus Armbruster666daa62010-06-02 18:48:27 +0200456 int bdrv_flags = 0;
457 int on_read_error, on_write_error;
Alberto Garcia362e9292015-10-28 17:33:04 +0200458 bool account_invalid, account_failed;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300459 bool writethrough, read_only;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200460 BlockBackend *blk;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200461 BlockDriverState *bs;
Benoît Canetcc0681c2013-09-02 14:14:39 +0200462 ThrottleConfig cfg;
Markus Armbruster666daa62010-06-02 18:48:27 +0200463 int snapshot = 0;
Stefan Hajnoczic5461942013-02-13 16:53:42 +0100464 Error *error = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100465 QemuOpts *opts;
Alberto Garcia40119ef2015-11-16 11:28:38 +0200466 QDict *interval_dict = NULL;
467 QList *interval_list = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100468 const char *id;
Max Reitzfbf81752015-10-19 17:53:31 +0200469 BlockdevDetectZeroesOptions detect_zeroes =
470 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
471 const char *throttling_group = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200472
Kevin Wolff298d072013-09-10 12:01:20 +0200473 /* Check common options by copying from bs_opts to opts, all other options
474 * stay in bs_opts for processing by bdrv_open(). */
475 id = qdict_get_try_str(bs_opts, "id");
Kevin Wolf00063832013-03-15 10:35:07 +0100476 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100477 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200478 error_propagate(errp, error);
Markus Armbruster6376f952014-05-28 11:17:01 +0200479 goto err_no_opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100480 }
481
Kevin Wolf00063832013-03-15 10:35:07 +0100482 qemu_opts_absorb_qdict(opts, bs_opts, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100483 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200484 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100485 goto early_err;
Kevin Wolf00063832013-03-15 10:35:07 +0100486 }
487
488 if (id) {
489 qdict_del(bs_opts, "id");
490 }
491
Markus Armbruster666daa62010-06-02 18:48:27 +0200492 /* extract parameters */
Markus Armbruster666daa62010-06-02 18:48:27 +0200493 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
Markus Armbruster666daa62010-06-02 18:48:27 +0200494
Alberto Garcia362e9292015-10-28 17:33:04 +0200495 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
496 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
497
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100498 writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
499
Alberto Garciaff356ee2016-07-08 17:03:00 +0300500 id = qemu_opts_id(opts);
501
Alberto Garcia40119ef2015-11-16 11:28:38 +0200502 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
503 qdict_array_split(interval_dict, &interval_list);
504
505 if (qdict_size(interval_dict) != 0) {
506 error_setg(errp, "Invalid option stats-intervals.%s",
507 qdict_first(interval_dict)->key);
508 goto early_err;
509 }
Alberto Garcia2be55062015-10-28 17:33:07 +0200510
Max Reitzfbf81752015-10-19 17:53:31 +0200511 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
512 &detect_zeroes, &error);
513 if (error) {
514 error_propagate(errp, error);
515 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200516 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200517
518 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
Peter Maydellc8057f92012-08-02 13:45:54 +0100519 if (is_help_option(buf)) {
520 error_printf("Supported formats:");
521 bdrv_iterate_format(bdrv_format_print, NULL);
522 error_printf("\n");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100523 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200524 }
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200525
Max Reitze4342ce2015-02-05 13:58:14 -0500526 if (qdict_haskey(bs_opts, "driver")) {
527 error_setg(errp, "Cannot specify both 'driver' and 'format'");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100528 goto early_err;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400529 }
Max Reitze4342ce2015-02-05 13:58:14 -0500530 qdict_put(bs_opts, "driver", qstring_from_str(buf));
Markus Armbruster666daa62010-06-02 18:48:27 +0200531 }
532
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200533 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200534 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200535 on_write_error = parse_block_error_action(buf, 0, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100536 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200537 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100538 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200539 }
540 }
541
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200542 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200543 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200544 on_read_error = parse_block_error_action(buf, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100545 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200546 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100547 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200548 }
549 }
550
Max Reitz5ec18f82015-10-19 17:53:30 +0200551 if (snapshot) {
Kevin Wolf91a097e2015-05-08 17:49:53 +0200552 bdrv_flags |= BDRV_O_SNAPSHOT;
Max Reitz5ec18f82015-10-19 17:53:30 +0200553 }
554
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300555 read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false);
556
Kevin Wolf326642b2013-07-11 12:52:34 +0200557 /* init */
Kevin Wolf39c4ae92015-11-13 14:45:42 +0100558 if ((!file || !*file) && !qdict_size(bs_opts)) {
Max Reitz5ec18f82015-10-19 17:53:30 +0200559 BlockBackendRootState *blk_rs;
560
Kevin Wolf6d0eb642017-01-20 17:07:26 +0100561 blk = blk_new(0, BLK_PERM_ALL);
Max Reitz5ec18f82015-10-19 17:53:30 +0200562 blk_rs = blk_get_root_state(blk);
563 blk_rs->open_flags = bdrv_flags;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300564 blk_rs->read_only = read_only;
Max Reitz5ec18f82015-10-19 17:53:30 +0200565 blk_rs->detect_zeroes = detect_zeroes;
566
Max Reitze4342ce2015-02-05 13:58:14 -0500567 QDECREF(bs_opts);
568 } else {
569 if (file && !*file) {
570 file = NULL;
571 }
572
Kevin Wolf91a097e2015-05-08 17:49:53 +0200573 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
574 * with other callers) rather than what we want as the real defaults.
575 * Apply the defaults here instead. */
Kevin Wolf91a097e2015-05-08 17:49:53 +0200576 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
577 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300578 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY,
579 read_only ? "on" : "off");
Kevin Wolf72e775c2016-03-15 14:34:37 +0100580 assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
Kevin Wolf91a097e2015-05-08 17:49:53 +0200581
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100582 if (runstate_check(RUN_STATE_INMIGRATE)) {
583 bdrv_flags |= BDRV_O_INACTIVE;
584 }
585
Max Reitzefaa7c42016-03-16 19:54:38 +0100586 blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
Max Reitze4342ce2015-02-05 13:58:14 -0500587 if (!blk) {
588 goto err_no_bs_opts;
589 }
590 bs = blk_bs(blk);
Max Reitze4342ce2015-02-05 13:58:14 -0500591
Max Reitz5ec18f82015-10-19 17:53:30 +0200592 bs->detect_zeroes = detect_zeroes;
593
Max Reitz5ec18f82015-10-19 17:53:30 +0200594 if (bdrv_key_required(bs)) {
595 autostart = 0;
596 }
Alberto Garcia362e9292015-10-28 17:33:04 +0200597
598 block_acct_init(blk_get_stats(blk), account_invalid, account_failed);
Alberto Garcia2be55062015-10-28 17:33:07 +0200599
Alberto Garcia40119ef2015-11-16 11:28:38 +0200600 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
601 blk_unref(blk);
602 blk = NULL;
603 goto err_no_bs_opts;
Alberto Garcia2be55062015-10-28 17:33:07 +0200604 }
Max Reitz5ec18f82015-10-19 17:53:30 +0200605 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200606
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100607 /* disk I/O throttling */
608 if (throttle_enabled(&cfg)) {
609 if (!throttling_group) {
Alberto Garciaff356ee2016-07-08 17:03:00 +0300610 throttling_group = id;
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100611 }
612 blk_io_limits_enable(blk, throttling_group);
613 blk_set_io_limits(blk, &cfg);
614 }
615
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100616 blk_set_enable_write_cache(blk, !writethrough);
Max Reitz373340b2015-10-19 17:53:22 +0200617 blk_set_on_error(blk, on_read_error, on_write_error);
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200618
Alberto Garciaff356ee2016-07-08 17:03:00 +0300619 if (!monitor_add_blk(blk, id, errp)) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100620 blk_unref(blk);
621 blk = NULL;
622 goto err_no_bs_opts;
623 }
624
Max Reitze4342ce2015-02-05 13:58:14 -0500625err_no_bs_opts:
Kevin Wolf00063832013-03-15 10:35:07 +0100626 qemu_opts_del(opts);
Alberto Garcia40119ef2015-11-16 11:28:38 +0200627 QDECREF(interval_dict);
628 QDECREF(interval_list);
Markus Armbruster18e46a02014-10-07 13:59:06 +0200629 return blk;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100630
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100631early_err:
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100632 qemu_opts_del(opts);
Alberto Garcia40119ef2015-11-16 11:28:38 +0200633 QDECREF(interval_dict);
634 QDECREF(interval_list);
Markus Armbruster6376f952014-05-28 11:17:01 +0200635err_no_opts:
636 QDECREF(bs_opts);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100637 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200638}
639
Max Reitzbd745e22015-10-19 17:53:32 +0200640/* Takes the ownership of bs_opts */
641static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
642{
Max Reitzbd745e22015-10-19 17:53:32 +0200643 int bdrv_flags = 0;
644
Kevin Wolfa81d6162016-03-07 14:23:04 +0100645 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
646 * with other callers) rather than what we want as the real defaults.
647 * Apply the defaults here instead. */
Kevin Wolfa81d6162016-03-07 14:23:04 +0100648 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
649 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300650 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off");
Kevin Wolfa81d6162016-03-07 14:23:04 +0100651
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100652 if (runstate_check(RUN_STATE_INMIGRATE)) {
653 bdrv_flags |= BDRV_O_INACTIVE;
654 }
655
Kevin Wolf74e1ae72016-09-20 20:48:52 +0200656 return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
Max Reitzbd745e22015-10-19 17:53:32 +0200657}
658
Max Reitz9c4218e2016-01-29 16:36:12 +0100659void blockdev_close_all_bdrv_states(void)
660{
661 BlockDriverState *bs, *next_bs;
662
663 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
664 AioContext *ctx = bdrv_get_aio_context(bs);
665
666 aio_context_acquire(ctx);
667 bdrv_unref(bs);
668 aio_context_release(ctx);
669 }
670}
671
Max Reitz262b4e82016-03-16 19:54:41 +0100672/* Iterates over the list of monitor-owned BlockDriverStates */
673BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
674{
675 return bs ? QTAILQ_NEXT(bs, monitor_list)
676 : QTAILQ_FIRST(&monitor_bdrv_states);
677}
678
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200679static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
680 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200681{
682 const char *value;
683
684 value = qemu_opt_get(opts, from);
685 if (value) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200686 if (qemu_opt_find(opts, to)) {
687 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
688 "same time", to, from);
689 return;
690 }
Jun Li20d6cd42014-09-24 13:45:27 +0800691 }
692
693 /* rename all items in opts */
694 while ((value = qemu_opt_get(opts, from))) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100695 qemu_opt_set(opts, to, value, &error_abort);
Kevin Wolf57975222013-07-17 14:41:54 +0200696 qemu_opt_unset(opts, from);
697 }
698}
699
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200700QemuOptsList qemu_legacy_drive_opts = {
701 .name = "drive",
702 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
703 .desc = {
704 {
Kevin Wolf87a899c2013-09-10 15:48:13 +0200705 .name = "bus",
706 .type = QEMU_OPT_NUMBER,
707 .help = "bus number",
708 },{
709 .name = "unit",
710 .type = QEMU_OPT_NUMBER,
711 .help = "unit number (i.e. lun for scsi)",
712 },{
713 .name = "index",
714 .type = QEMU_OPT_NUMBER,
715 .help = "index number",
716 },{
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200717 .name = "media",
718 .type = QEMU_OPT_STRING,
719 .help = "media type (disk, cdrom)",
Kevin Wolf593d4642013-08-28 17:24:51 +0200720 },{
721 .name = "if",
722 .type = QEMU_OPT_STRING,
723 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
Kevin Wolfb41a7332013-09-09 16:49:49 +0200724 },{
725 .name = "cyls",
726 .type = QEMU_OPT_NUMBER,
727 .help = "number of cylinders (ide disk geometry)",
728 },{
729 .name = "heads",
730 .type = QEMU_OPT_NUMBER,
731 .help = "number of heads (ide disk geometry)",
732 },{
733 .name = "secs",
734 .type = QEMU_OPT_NUMBER,
735 .help = "number of sectors (ide disk geometry)",
736 },{
737 .name = "trans",
738 .type = QEMU_OPT_STRING,
739 .help = "chs translation (auto, lba, none)",
Kevin Wolf26929292013-09-09 17:01:03 +0200740 },{
741 .name = "boot",
742 .type = QEMU_OPT_BOOL,
743 .help = "(deprecated, ignored)",
Kevin Wolf394c7d42013-09-13 14:09:17 +0200744 },{
745 .name = "addr",
746 .type = QEMU_OPT_STRING,
747 .help = "pci address (virtio only)",
Max Reitzd095b462013-12-20 19:28:14 +0100748 },{
Kevin Wolfbcf83152014-06-06 15:21:48 +0200749 .name = "serial",
750 .type = QEMU_OPT_STRING,
751 .help = "disk serial number",
752 },{
Max Reitzd095b462013-12-20 19:28:14 +0100753 .name = "file",
754 .type = QEMU_OPT_STRING,
755 .help = "file name",
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200756 },
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200757
758 /* Options that are passed on, but have special semantics with -drive */
759 {
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300760 .name = BDRV_OPT_READ_ONLY,
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200761 .type = QEMU_OPT_BOOL,
762 .help = "open drive file as read-only",
763 },{
Kevin Wolfee13ed12014-02-09 09:52:32 +0100764 .name = "rerror",
765 .type = QEMU_OPT_STRING,
766 .help = "read error action",
767 },{
768 .name = "werror",
769 .type = QEMU_OPT_STRING,
770 .help = "write error action",
771 },{
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200772 .name = "copy-on-read",
773 .type = QEMU_OPT_BOOL,
774 .help = "copy read data from backing file into image file",
775 },
776
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200777 { /* end of list */ }
778 },
779};
780
Markus Armbruster60e19e02014-06-06 14:50:58 +0200781DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
Kevin Wolf57975222013-07-17 14:41:54 +0200782{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200783 const char *value;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200784 BlockBackend *blk;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200785 DriveInfo *dinfo = NULL;
Kevin Wolff298d072013-09-10 12:01:20 +0200786 QDict *bs_opts;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200787 QemuOpts *legacy_opts;
788 DriveMediaType media = MEDIA_DISK;
Kevin Wolf593d4642013-08-28 17:24:51 +0200789 BlockInterfaceType type;
Kevin Wolfb41a7332013-09-09 16:49:49 +0200790 int cyls, heads, secs, translation;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200791 int max_devs, bus_id, unit_id, index;
Kevin Wolf394c7d42013-09-13 14:09:17 +0200792 const char *devaddr;
Kevin Wolfee13ed12014-02-09 09:52:32 +0100793 const char *werror, *rerror;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800794 bool read_only = false;
795 bool copy_on_read;
Kevin Wolfbcf83152014-06-06 15:21:48 +0200796 const char *serial;
Max Reitzd095b462013-12-20 19:28:14 +0100797 const char *filename;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200798 Error *local_err = NULL;
Kevin Wolf247147f2014-09-24 16:37:14 +0200799 int i;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200800
Kevin Wolf57975222013-07-17 14:41:54 +0200801 /* Change legacy command line options into QMP ones */
Kevin Wolf247147f2014-09-24 16:37:14 +0200802 static const struct {
803 const char *from;
804 const char *to;
805 } opt_renames[] = {
806 { "iops", "throttling.iops-total" },
807 { "iops_rd", "throttling.iops-read" },
808 { "iops_wr", "throttling.iops-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200809
Kevin Wolf247147f2014-09-24 16:37:14 +0200810 { "bps", "throttling.bps-total" },
811 { "bps_rd", "throttling.bps-read" },
812 { "bps_wr", "throttling.bps-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200813
Kevin Wolf247147f2014-09-24 16:37:14 +0200814 { "iops_max", "throttling.iops-total-max" },
815 { "iops_rd_max", "throttling.iops-read-max" },
816 { "iops_wr_max", "throttling.iops-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200817
Kevin Wolf247147f2014-09-24 16:37:14 +0200818 { "bps_max", "throttling.bps-total-max" },
819 { "bps_rd_max", "throttling.bps-read-max" },
820 { "bps_wr_max", "throttling.bps-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200821
Kevin Wolf247147f2014-09-24 16:37:14 +0200822 { "iops_size", "throttling.iops-size" },
Benoît Canet2024c1d2013-09-02 14:14:41 +0200823
Alberto Garcia76f4afb2015-06-08 18:17:44 +0200824 { "group", "throttling.group" },
825
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300826 { "readonly", BDRV_OPT_READ_ONLY },
Kevin Wolf247147f2014-09-24 16:37:14 +0200827 };
828
829 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200830 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
831 &local_err);
832 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +0100833 error_report_err(local_err);
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200834 return NULL;
835 }
Kevin Wolf247147f2014-09-24 16:37:14 +0200836 }
Kevin Wolf0f227a92013-07-19 20:07:29 +0200837
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200838 value = qemu_opt_get(all_opts, "cache");
839 if (value) {
840 int flags = 0;
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100841 bool writethrough;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200842
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100843 if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200844 error_report("invalid cache option");
845 return NULL;
846 }
847
848 /* Specific options take precedence */
Kevin Wolf54861b92015-04-07 16:55:00 +0200849 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
850 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100851 !writethrough, &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200852 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200853 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
854 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100855 !!(flags & BDRV_O_NOCACHE), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200856 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200857 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
858 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100859 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200860 }
861 qemu_opt_unset(all_opts, "cache");
862 }
863
Kevin Wolff298d072013-09-10 12:01:20 +0200864 /* Get a QDict for processing the options */
865 bs_opts = qdict_new();
866 qemu_opts_to_qdict(all_opts, bs_opts);
867
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800868 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
869 &error_abort);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200870 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100871 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +0100872 error_report_err(local_err);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200873 goto fail;
874 }
875
Kevin Wolf26929292013-09-09 17:01:03 +0200876 /* Deprecated option boot=[on|off] */
877 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
878 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
879 "ignored. Future versions will reject this parameter. Please "
880 "update your scripts.\n");
881 }
882
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200883 /* Media type */
884 value = qemu_opt_get(legacy_opts, "media");
885 if (value) {
886 if (!strcmp(value, "disk")) {
887 media = MEDIA_DISK;
888 } else if (!strcmp(value, "cdrom")) {
889 media = MEDIA_CDROM;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800890 read_only = true;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200891 } else {
892 error_report("'%s' invalid media", value);
893 goto fail;
894 }
895 }
896
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200897 /* copy-on-read is disabled with a warning for read-only devices */
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300898 read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false);
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200899 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
900
901 if (read_only && copy_on_read) {
902 error_report("warning: disabling copy-on-read on read-only drive");
903 copy_on_read = false;
904 }
905
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300906 qdict_put(bs_opts, BDRV_OPT_READ_ONLY,
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200907 qstring_from_str(read_only ? "on" : "off"));
908 qdict_put(bs_opts, "copy-on-read",
909 qstring_from_str(copy_on_read ? "on" :"off"));
910
Kevin Wolf593d4642013-08-28 17:24:51 +0200911 /* Controller type */
912 value = qemu_opt_get(legacy_opts, "if");
913 if (value) {
914 for (type = 0;
915 type < IF_COUNT && strcmp(value, if_name[type]);
916 type++) {
917 }
918 if (type == IF_COUNT) {
919 error_report("unsupported bus type '%s'", value);
920 goto fail;
921 }
922 } else {
923 type = block_default_type;
924 }
925
Kevin Wolfb41a7332013-09-09 16:49:49 +0200926 /* Geometry */
927 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
928 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
929 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
930
931 if (cyls || heads || secs) {
932 if (cyls < 1) {
933 error_report("invalid physical cyls number");
934 goto fail;
935 }
936 if (heads < 1) {
937 error_report("invalid physical heads number");
938 goto fail;
939 }
940 if (secs < 1) {
941 error_report("invalid physical secs number");
942 goto fail;
943 }
944 }
945
946 translation = BIOS_ATA_TRANSLATION_AUTO;
947 value = qemu_opt_get(legacy_opts, "trans");
948 if (value != NULL) {
949 if (!cyls) {
950 error_report("'%s' trans must be used with cyls, heads and secs",
951 value);
952 goto fail;
953 }
954 if (!strcmp(value, "none")) {
955 translation = BIOS_ATA_TRANSLATION_NONE;
956 } else if (!strcmp(value, "lba")) {
957 translation = BIOS_ATA_TRANSLATION_LBA;
Paolo Bonzinif31c41f2014-02-08 11:01:54 +0100958 } else if (!strcmp(value, "large")) {
959 translation = BIOS_ATA_TRANSLATION_LARGE;
960 } else if (!strcmp(value, "rechs")) {
961 translation = BIOS_ATA_TRANSLATION_RECHS;
Kevin Wolfb41a7332013-09-09 16:49:49 +0200962 } else if (!strcmp(value, "auto")) {
963 translation = BIOS_ATA_TRANSLATION_AUTO;
964 } else {
965 error_report("'%s' invalid translation type", value);
966 goto fail;
967 }
968 }
969
970 if (media == MEDIA_CDROM) {
971 if (cyls || secs || heads) {
972 error_report("CHS can't be set with media=cdrom");
973 goto fail;
974 }
975 }
976
Kevin Wolf87a899c2013-09-10 15:48:13 +0200977 /* Device address specified by bus/unit or index.
978 * If none was specified, try to find the first free one. */
979 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
980 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
981 index = qemu_opt_get_number(legacy_opts, "index", -1);
982
983 max_devs = if_max_devs[type];
984
985 if (index != -1) {
986 if (bus_id != 0 || unit_id != -1) {
987 error_report("index cannot be used with bus and unit");
988 goto fail;
989 }
990 bus_id = drive_index_to_bus_id(type, index);
991 unit_id = drive_index_to_unit_id(type, index);
992 }
993
994 if (unit_id == -1) {
995 unit_id = 0;
996 while (drive_get(type, bus_id, unit_id) != NULL) {
997 unit_id++;
998 if (max_devs && unit_id >= max_devs) {
999 unit_id -= max_devs;
1000 bus_id++;
1001 }
1002 }
1003 }
1004
1005 if (max_devs && unit_id >= max_devs) {
1006 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
1007 goto fail;
1008 }
1009
1010 if (drive_get(type, bus_id, unit_id) != NULL) {
1011 error_report("drive with bus=%d, unit=%d (index=%d) exists",
1012 bus_id, unit_id, index);
1013 goto fail;
1014 }
1015
Kevin Wolfbcf83152014-06-06 15:21:48 +02001016 /* Serial number */
1017 serial = qemu_opt_get(legacy_opts, "serial");
1018
Kevin Wolf87a899c2013-09-10 15:48:13 +02001019 /* no id supplied -> create one */
1020 if (qemu_opts_id(all_opts) == NULL) {
1021 char *new_id;
1022 const char *mediastr = "";
1023 if (type == IF_IDE || type == IF_SCSI) {
1024 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
1025 }
1026 if (max_devs) {
1027 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
1028 mediastr, unit_id);
1029 } else {
1030 new_id = g_strdup_printf("%s%s%i", if_name[type],
1031 mediastr, unit_id);
1032 }
1033 qdict_put(bs_opts, "id", qstring_from_str(new_id));
1034 g_free(new_id);
1035 }
1036
Kevin Wolf394c7d42013-09-13 14:09:17 +02001037 /* Add virtio block device */
1038 devaddr = qemu_opt_get(legacy_opts, "addr");
1039 if (devaddr && type != IF_VIRTIO) {
1040 error_report("addr is not supported by this bus type");
1041 goto fail;
1042 }
1043
1044 if (type == IF_VIRTIO) {
1045 QemuOpts *devopts;
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -08001046 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
1047 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001048 if (arch_type == QEMU_ARCH_S390X) {
Alexander Graf1f68f1d2015-06-16 23:06:33 +02001049 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001050 } else {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001051 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001052 }
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001053 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
1054 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001055 if (devaddr) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001056 qemu_opt_set(devopts, "addr", devaddr, &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001057 }
1058 }
1059
Max Reitzd095b462013-12-20 19:28:14 +01001060 filename = qemu_opt_get(legacy_opts, "file");
1061
Kevin Wolfee13ed12014-02-09 09:52:32 +01001062 /* Check werror/rerror compatibility with if=... */
1063 werror = qemu_opt_get(legacy_opts, "werror");
1064 if (werror != NULL) {
1065 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
1066 type != IF_NONE) {
1067 error_report("werror is not supported by this bus type");
1068 goto fail;
1069 }
1070 qdict_put(bs_opts, "werror", qstring_from_str(werror));
1071 }
1072
1073 rerror = qemu_opt_get(legacy_opts, "rerror");
1074 if (rerror != NULL) {
1075 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
1076 type != IF_NONE) {
1077 error_report("rerror is not supported by this bus type");
1078 goto fail;
1079 }
1080 qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
1081 }
1082
Kevin Wolf2d246f02013-09-18 15:14:47 +02001083 /* Actual block device init: Functionality shared with blockdev-add */
Markus Armbruster18e46a02014-10-07 13:59:06 +02001084 blk = blockdev_init(filename, bs_opts, &local_err);
Markus Armbruster3cb0e252014-05-28 11:17:02 +02001085 bs_opts = NULL;
Markus Armbruster18e46a02014-10-07 13:59:06 +02001086 if (!blk) {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001087 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +01001088 error_report_err(local_err);
Kevin Wolfb6810722013-09-20 11:33:11 +02001089 }
Kevin Wolf2d246f02013-09-18 15:14:47 +02001090 goto fail;
Kevin Wolfb6810722013-09-20 11:33:11 +02001091 } else {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001092 assert(!local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001093 }
1094
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001095 /* Create legacy DriveInfo */
1096 dinfo = g_malloc0(sizeof(*dinfo));
Kevin Wolff298d072013-09-10 12:01:20 +02001097 dinfo->opts = all_opts;
Kevin Wolf2d246f02013-09-18 15:14:47 +02001098
Kevin Wolfb41a7332013-09-09 16:49:49 +02001099 dinfo->cyls = cyls;
1100 dinfo->heads = heads;
1101 dinfo->secs = secs;
1102 dinfo->trans = translation;
1103
Kevin Wolfee13ed12014-02-09 09:52:32 +01001104 dinfo->type = type;
Kevin Wolf87a899c2013-09-10 15:48:13 +02001105 dinfo->bus = bus_id;
1106 dinfo->unit = unit_id;
Kevin Wolf394c7d42013-09-13 14:09:17 +02001107 dinfo->devaddr = devaddr;
Kevin Wolfbcf83152014-06-06 15:21:48 +02001108 dinfo->serial = g_strdup(serial);
1109
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001110 blk_set_legacy_dinfo(blk, dinfo);
1111
Kevin Wolfe34ef042013-09-19 14:24:10 +02001112 switch(type) {
1113 case IF_IDE:
1114 case IF_SCSI:
1115 case IF_XEN:
1116 case IF_NONE:
1117 dinfo->media_cd = media == MEDIA_CDROM;
1118 break;
1119 default:
1120 break;
1121 }
1122
Kevin Wolf2d246f02013-09-18 15:14:47 +02001123fail:
Kevin Wolf33cb7dc2013-08-28 17:00:13 +02001124 qemu_opts_del(legacy_opts);
Markus Armbruster3cb0e252014-05-28 11:17:02 +02001125 QDECREF(bs_opts);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001126 return dinfo;
Kevin Wolf57975222013-07-17 14:41:54 +02001127}
1128
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02001129static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp)
1130{
1131 BlockDriverState *bs;
1132
1133 bs = bdrv_lookup_bs(name, name, errp);
1134 if (bs == NULL) {
1135 return NULL;
1136 }
1137
1138 if (!bdrv_is_root_node(bs)) {
1139 error_setg(errp, "Need a root block node");
1140 return NULL;
1141 }
1142
1143 if (!bdrv_is_inserted(bs)) {
1144 error_setg(errp, "Device has no medium");
1145 return NULL;
1146 }
1147
1148 return bs;
1149}
1150
Kevin Wolfb33945c2016-09-20 13:38:43 +02001151static BlockBackend *qmp_get_blk(const char *blk_name, const char *qdev_id,
1152 Error **errp)
1153{
1154 BlockBackend *blk;
1155
1156 if (!blk_name == !qdev_id) {
1157 error_setg(errp, "Need exactly one of 'device' and 'id'");
1158 return NULL;
1159 }
1160
1161 if (qdev_id) {
1162 blk = blk_by_qdev_id(qdev_id, errp);
1163 } else {
1164 blk = blk_by_name(blk_name);
1165 if (blk == NULL) {
1166 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1167 "Device '%s' not found", blk_name);
1168 }
1169 }
1170
1171 return blk;
1172}
1173
Markus Armbruster3e5a50d2015-02-06 13:55:43 +01001174void hmp_commit(Monitor *mon, const QDict *qdict)
Markus Armbruster666daa62010-06-02 18:48:27 +02001175{
Markus Armbruster666daa62010-06-02 18:48:27 +02001176 const char *device = qdict_get_str(qdict, "device");
Fam Zhenga0e85442015-03-02 19:36:48 +08001177 BlockBackend *blk;
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001178 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +02001179
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001180 if (!strcmp(device, "all")) {
Max Reitzda31d592016-03-16 19:54:32 +01001181 ret = blk_commit_all();
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001182 } else {
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001183 BlockDriverState *bs;
1184 AioContext *aio_context;
1185
Fam Zhenga0e85442015-03-02 19:36:48 +08001186 blk = blk_by_name(device);
1187 if (!blk) {
Jeff Cody58513bd2013-01-18 12:45:35 -05001188 monitor_printf(mon, "Device '%s' not found\n", device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001189 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001190 }
Max Reitz5433c242015-10-19 17:53:29 +02001191 if (!blk_is_available(blk)) {
1192 monitor_printf(mon, "Device '%s' has no medium\n", device);
1193 return;
1194 }
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001195
1196 bs = blk_bs(blk);
1197 aio_context = bdrv_get_aio_context(bs);
1198 aio_context_acquire(aio_context);
1199
1200 ret = bdrv_commit(bs);
1201
1202 aio_context_release(aio_context);
Jeff Cody58513bd2013-01-18 12:45:35 -05001203 }
1204 if (ret < 0) {
1205 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1206 strerror(-ret));
Markus Armbruster666daa62010-06-02 18:48:27 +02001207 }
1208}
1209
Eric Blake10f75902016-03-03 09:16:50 -07001210static void blockdev_do_action(TransactionAction *action, Error **errp)
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001211{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001212 TransactionActionList list;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001213
Eric Blake10f75902016-03-03 09:16:50 -07001214 list.value = action;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001215 list.next = NULL;
John Snow94d16a62015-11-05 18:13:18 -05001216 qmp_transaction(&list, false, NULL, errp);
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001217}
1218
Benoît Canet0901f672014-01-23 21:31:38 +01001219void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1220 bool has_node_name, const char *node_name,
1221 const char *snapshot_file,
1222 bool has_snapshot_node_name,
1223 const char *snapshot_node_name,
Luiz Capitulino6106e242011-11-25 16:15:19 -02001224 bool has_format, const char *format,
Benoît Canet0901f672014-01-23 21:31:38 +01001225 bool has_mode, NewImageMode mode, Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +01001226{
Alberto Garciaa911e6a2015-10-26 14:27:14 +02001227 BlockdevSnapshotSync snapshot = {
Benoît Canet0901f672014-01-23 21:31:38 +01001228 .has_device = has_device,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001229 .device = (char *) device,
Benoît Canet0901f672014-01-23 21:31:38 +01001230 .has_node_name = has_node_name,
1231 .node_name = (char *) node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001232 .snapshot_file = (char *) snapshot_file,
Benoît Canet0901f672014-01-23 21:31:38 +01001233 .has_snapshot_node_name = has_snapshot_node_name,
1234 .snapshot_node_name = (char *) snapshot_node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001235 .has_format = has_format,
1236 .format = (char *) format,
1237 .has_mode = has_mode,
1238 .mode = mode,
1239 };
Eric Blake10f75902016-03-03 09:16:50 -07001240 TransactionAction action = {
1241 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001242 .u.blockdev_snapshot_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001243 };
1244 blockdev_do_action(&action, errp);
Jes Sorensenf8882562010-12-16 13:52:16 +01001245}
1246
Alberto Garcia43de7e22015-10-26 14:27:16 +02001247void qmp_blockdev_snapshot(const char *node, const char *overlay,
1248 Error **errp)
1249{
1250 BlockdevSnapshot snapshot_data = {
1251 .node = (char *) node,
1252 .overlay = (char *) overlay
1253 };
Eric Blake10f75902016-03-03 09:16:50 -07001254 TransactionAction action = {
1255 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
Eric Blake32bafa82016-03-17 16:48:37 -06001256 .u.blockdev_snapshot.data = &snapshot_data,
Eric Blake10f75902016-03-03 09:16:50 -07001257 };
1258 blockdev_do_action(&action, errp);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001259}
1260
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001261void qmp_blockdev_snapshot_internal_sync(const char *device,
1262 const char *name,
1263 Error **errp)
1264{
1265 BlockdevSnapshotInternal snapshot = {
1266 .device = (char *) device,
1267 .name = (char *) name
1268 };
Eric Blake10f75902016-03-03 09:16:50 -07001269 TransactionAction action = {
1270 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001271 .u.blockdev_snapshot_internal_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001272 };
1273 blockdev_do_action(&action, errp);
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001274}
1275
Wenchao Xia44e3e052013-09-11 14:04:36 +08001276SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1277 bool has_id,
1278 const char *id,
1279 bool has_name,
1280 const char *name,
1281 Error **errp)
1282{
Fam Zhenga0e85442015-03-02 19:36:48 +08001283 BlockDriverState *bs;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001284 AioContext *aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001285 QEMUSnapshotInfo sn;
1286 Error *local_err = NULL;
1287 SnapshotInfo *info = NULL;
1288 int ret;
1289
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001290 bs = qmp_get_root_bs(device, errp);
1291 if (!bs) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001292 return NULL;
1293 }
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001294 aio_context = bdrv_get_aio_context(bs);
Max Reitz5433c242015-10-19 17:53:29 +02001295 aio_context_acquire(aio_context);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001296
1297 if (!has_id) {
1298 id = NULL;
1299 }
1300
1301 if (!has_name) {
1302 name = NULL;
1303 }
1304
1305 if (!id && !name) {
1306 error_setg(errp, "Name or id must be provided");
Max Reitz5433c242015-10-19 17:53:29 +02001307 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001308 }
1309
Stefan Hajnoczi0b928852014-11-19 14:19:43 +00001310 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1311 goto out_aio_context;
1312 }
1313
Wenchao Xia44e3e052013-09-11 14:04:36 +08001314 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001315 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001316 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001317 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001318 }
1319 if (!ret) {
1320 error_setg(errp,
1321 "Snapshot with id '%s' and name '%s' does not exist on "
1322 "device '%s'",
1323 STR_OR_NULL(id), STR_OR_NULL(name), device);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001324 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001325 }
1326
1327 bdrv_snapshot_delete(bs, id, name, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001328 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001329 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001330 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001331 }
1332
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001333 aio_context_release(aio_context);
1334
Markus Armbruster5839e532014-08-19 10:31:08 +02001335 info = g_new0(SnapshotInfo, 1);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001336 info->id = g_strdup(sn.id_str);
1337 info->name = g_strdup(sn.name);
1338 info->date_nsec = sn.date_nsec;
1339 info->date_sec = sn.date_sec;
1340 info->vm_state_size = sn.vm_state_size;
1341 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1342 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1343
1344 return info;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001345
1346out_aio_context:
1347 aio_context_release(aio_context);
1348 return NULL;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001349}
Jeff Cody8802d1f2012-02-28 15:54:06 -05001350
John Snow341ebc22015-04-17 19:49:52 -04001351/**
1352 * block_dirty_bitmap_lookup:
1353 * Return a dirty bitmap (if present), after validating
1354 * the node reference and bitmap names.
1355 *
1356 * @node: The name of the BDS node to search for bitmaps
1357 * @name: The name of the bitmap to search for
1358 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1359 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1360 * @errp: Output pointer for error information. Can be NULL.
1361 *
1362 * @return: A bitmap object on success, or NULL on failure.
1363 */
1364static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1365 const char *name,
1366 BlockDriverState **pbs,
1367 AioContext **paio,
1368 Error **errp)
1369{
1370 BlockDriverState *bs;
1371 BdrvDirtyBitmap *bitmap;
1372 AioContext *aio_context;
1373
1374 if (!node) {
1375 error_setg(errp, "Node cannot be NULL");
1376 return NULL;
1377 }
1378 if (!name) {
1379 error_setg(errp, "Bitmap name cannot be NULL");
1380 return NULL;
1381 }
1382 bs = bdrv_lookup_bs(node, node, NULL);
1383 if (!bs) {
1384 error_setg(errp, "Node '%s' not found", node);
1385 return NULL;
1386 }
1387
1388 aio_context = bdrv_get_aio_context(bs);
1389 aio_context_acquire(aio_context);
1390
1391 bitmap = bdrv_find_dirty_bitmap(bs, name);
1392 if (!bitmap) {
1393 error_setg(errp, "Dirty bitmap '%s' not found", name);
1394 goto fail;
1395 }
1396
1397 if (pbs) {
1398 *pbs = bs;
1399 }
1400 if (paio) {
1401 *paio = aio_context;
1402 } else {
1403 aio_context_release(aio_context);
1404 }
1405
1406 return bitmap;
1407
1408 fail:
1409 aio_context_release(aio_context);
1410 return NULL;
1411}
1412
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00001413/* New and old BlockDriverState structs for atomic group operations */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001414
John Snow50f43f02015-11-05 18:13:09 -05001415typedef struct BlkActionState BlkActionState;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001416
John Snow50f43f02015-11-05 18:13:09 -05001417/**
1418 * BlkActionOps:
1419 * Table of operations that define an Action.
1420 *
1421 * @instance_size: Size of state struct, in bytes.
1422 * @prepare: Prepare the work, must NOT be NULL.
1423 * @commit: Commit the changes, can be NULL.
1424 * @abort: Abort the changes on fail, can be NULL.
1425 * @clean: Clean up resources after all transaction actions have called
1426 * commit() or abort(). Can be NULL.
1427 *
1428 * Only prepare() may fail. In a single transaction, only one of commit() or
1429 * abort() will be called. clean() will always be called if it is present.
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001430 */
John Snow50f43f02015-11-05 18:13:09 -05001431typedef struct BlkActionOps {
1432 size_t instance_size;
1433 void (*prepare)(BlkActionState *common, Error **errp);
1434 void (*commit)(BlkActionState *common);
1435 void (*abort)(BlkActionState *common);
1436 void (*clean)(BlkActionState *common);
1437} BlkActionOps;
1438
1439/**
1440 * BlkActionState:
1441 * Describes one Action's state within a Transaction.
1442 *
1443 * @action: QAPI-defined enum identifying which Action to perform.
1444 * @ops: Table of ActionOps this Action can perform.
John Snow94d16a62015-11-05 18:13:18 -05001445 * @block_job_txn: Transaction which this action belongs to.
John Snow50f43f02015-11-05 18:13:09 -05001446 * @entry: List membership for all Actions in this Transaction.
1447 *
1448 * This structure must be arranged as first member in a subclassed type,
1449 * assuming that the compiler will also arrange it to the same offsets as the
1450 * base class.
1451 */
1452struct BlkActionState {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001453 TransactionAction *action;
John Snow50f43f02015-11-05 18:13:09 -05001454 const BlkActionOps *ops;
John Snow94d16a62015-11-05 18:13:18 -05001455 BlockJobTxn *block_job_txn;
1456 TransactionProperties *txn_props;
John Snow50f43f02015-11-05 18:13:09 -05001457 QSIMPLEQ_ENTRY(BlkActionState) entry;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001458};
1459
Wenchao Xiabbe86012013-09-11 14:04:34 +08001460/* internal snapshot private data */
1461typedef struct InternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001462 BlkActionState common;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001463 BlockDriverState *bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001464 AioContext *aio_context;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001465 QEMUSnapshotInfo sn;
Fam Zheng507306c2015-10-23 11:08:13 +08001466 bool created;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001467} InternalSnapshotState;
1468
John Snow94d16a62015-11-05 18:13:18 -05001469
1470static int action_check_completion_mode(BlkActionState *s, Error **errp)
1471{
1472 if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
1473 error_setg(errp,
1474 "Action '%s' does not support Transaction property "
1475 "completion-mode = %s",
1476 TransactionActionKind_lookup[s->action->type],
1477 ActionCompletionMode_lookup[s->txn_props->completion_mode]);
1478 return -1;
1479 }
1480 return 0;
1481}
1482
John Snow50f43f02015-11-05 18:13:09 -05001483static void internal_snapshot_prepare(BlkActionState *common,
Wenchao Xiabbe86012013-09-11 14:04:34 +08001484 Error **errp)
1485{
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001486 Error *local_err = NULL;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001487 const char *device;
1488 const char *name;
1489 BlockDriverState *bs;
1490 QEMUSnapshotInfo old_sn, *sn;
1491 bool ret;
1492 qemu_timeval tv;
1493 BlockdevSnapshotInternal *internal;
1494 InternalSnapshotState *state;
1495 int ret1;
1496
Eric Blake6a8f9662015-10-26 16:34:54 -06001497 g_assert(common->action->type ==
Wenchao Xiabbe86012013-09-11 14:04:34 +08001498 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
Eric Blake32bafa82016-03-17 16:48:37 -06001499 internal = common->action->u.blockdev_snapshot_internal_sync.data;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001500 state = DO_UPCAST(InternalSnapshotState, common, common);
1501
1502 /* 1. parse input */
1503 device = internal->device;
1504 name = internal->name;
1505
1506 /* 2. check for validation */
John Snow94d16a62015-11-05 18:13:18 -05001507 if (action_check_completion_mode(common, errp) < 0) {
1508 return;
1509 }
1510
Kevin Wolf75dfd402016-06-23 14:20:24 +02001511 bs = qmp_get_root_bs(device, errp);
1512 if (!bs) {
Wenchao Xiabbe86012013-09-11 14:04:34 +08001513 return;
1514 }
1515
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001516 /* AioContext is released in .clean() */
Kevin Wolf75dfd402016-06-23 14:20:24 +02001517 state->aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001518 aio_context_acquire(state->aio_context);
1519
Fam Zheng507306c2015-10-23 11:08:13 +08001520 state->bs = bs;
1521 bdrv_drained_begin(bs);
1522
Stefan Hajnoczi3dc7ca32014-11-21 10:49:00 +00001523 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
1524 return;
1525 }
1526
Wenchao Xiabbe86012013-09-11 14:04:34 +08001527 if (bdrv_is_read_only(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001528 error_setg(errp, "Device '%s' is read only", device);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001529 return;
1530 }
1531
1532 if (!bdrv_can_snapshot(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001533 error_setg(errp, "Block format '%s' used by device '%s' "
1534 "does not support internal snapshots",
1535 bs->drv->format_name, device);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001536 return;
1537 }
1538
1539 if (!strlen(name)) {
1540 error_setg(errp, "Name is empty");
1541 return;
1542 }
1543
1544 /* check whether a snapshot with name exist */
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001545 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1546 &local_err);
1547 if (local_err) {
1548 error_propagate(errp, local_err);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001549 return;
1550 } else if (ret) {
1551 error_setg(errp,
1552 "Snapshot with name '%s' already exists on device '%s'",
1553 name, device);
1554 return;
1555 }
1556
1557 /* 3. take the snapshot */
1558 sn = &state->sn;
1559 pstrcpy(sn->name, sizeof(sn->name), name);
1560 qemu_gettimeofday(&tv);
1561 sn->date_sec = tv.tv_sec;
1562 sn->date_nsec = tv.tv_usec * 1000;
1563 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1564
1565 ret1 = bdrv_snapshot_create(bs, sn);
1566 if (ret1 < 0) {
1567 error_setg_errno(errp, -ret1,
1568 "Failed to create snapshot '%s' on device '%s'",
1569 name, device);
1570 return;
1571 }
1572
1573 /* 4. succeed, mark a snapshot is created */
Fam Zheng507306c2015-10-23 11:08:13 +08001574 state->created = true;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001575}
1576
John Snow50f43f02015-11-05 18:13:09 -05001577static void internal_snapshot_abort(BlkActionState *common)
Wenchao Xiabbe86012013-09-11 14:04:34 +08001578{
1579 InternalSnapshotState *state =
1580 DO_UPCAST(InternalSnapshotState, common, common);
1581 BlockDriverState *bs = state->bs;
1582 QEMUSnapshotInfo *sn = &state->sn;
1583 Error *local_error = NULL;
1584
Fam Zheng507306c2015-10-23 11:08:13 +08001585 if (!state->created) {
Wenchao Xiabbe86012013-09-11 14:04:34 +08001586 return;
1587 }
1588
1589 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
Markus Armbrusterc29b77f2015-12-18 16:35:14 +01001590 error_reportf_err(local_error,
1591 "Failed to delete snapshot with id '%s' and "
1592 "name '%s' on device '%s' in abort: ",
1593 sn->id_str, sn->name,
1594 bdrv_get_device_name(bs));
Wenchao Xiabbe86012013-09-11 14:04:34 +08001595 }
1596}
1597
John Snow50f43f02015-11-05 18:13:09 -05001598static void internal_snapshot_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001599{
1600 InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
1601 common, common);
1602
1603 if (state->aio_context) {
Fam Zheng507306c2015-10-23 11:08:13 +08001604 if (state->bs) {
1605 bdrv_drained_end(state->bs);
1606 }
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001607 aio_context_release(state->aio_context);
1608 }
1609}
1610
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001611/* external snapshot private data */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001612typedef struct ExternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001613 BlkActionState common;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001614 BlockDriverState *old_bs;
1615 BlockDriverState *new_bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001616 AioContext *aio_context;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001617} ExternalSnapshotState;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001618
John Snow50f43f02015-11-05 18:13:09 -05001619static void external_snapshot_prepare(BlkActionState *common,
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001620 Error **errp)
1621{
Max Reitz5b363932016-05-17 16:41:31 +02001622 int flags = 0;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001623 QDict *options = NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001624 Error *local_err = NULL;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001625 /* Device and node name of the image to generate the snapshot from */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001626 const char *device;
Benoît Canet0901f672014-01-23 21:31:38 +01001627 const char *node_name;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001628 /* Reference to the new image (for 'blockdev-snapshot') */
1629 const char *snapshot_ref;
1630 /* File name of the new image (for 'blockdev-snapshot-sync') */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001631 const char *new_image_file;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001632 ExternalSnapshotState *state =
1633 DO_UPCAST(ExternalSnapshotState, common, common);
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001634 TransactionAction *action = common->action;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001635
Alberto Garcia43de7e22015-10-26 14:27:16 +02001636 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1637 * purpose but a different set of parameters */
1638 switch (action->type) {
1639 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
1640 {
Eric Blake32bafa82016-03-17 16:48:37 -06001641 BlockdevSnapshot *s = action->u.blockdev_snapshot.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001642 device = s->node;
1643 node_name = s->node;
1644 new_image_file = NULL;
1645 snapshot_ref = s->overlay;
1646 }
1647 break;
1648 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
1649 {
Eric Blake32bafa82016-03-17 16:48:37 -06001650 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001651 device = s->has_device ? s->device : NULL;
1652 node_name = s->has_node_name ? s->node_name : NULL;
1653 new_image_file = s->snapshot_file;
1654 snapshot_ref = NULL;
1655 }
1656 break;
1657 default:
1658 g_assert_not_reached();
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001659 }
1660
1661 /* start processing */
John Snow94d16a62015-11-05 18:13:18 -05001662 if (action_check_completion_mode(common, errp) < 0) {
1663 return;
1664 }
1665
Alberto Garcia43de7e22015-10-26 14:27:16 +02001666 state->old_bs = bdrv_lookup_bs(device, node_name, errp);
1667 if (!state->old_bs) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001668 return;
1669 }
1670
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001671 /* Acquire AioContext now so any threads operating on old_bs stop */
1672 state->aio_context = bdrv_get_aio_context(state->old_bs);
1673 aio_context_acquire(state->aio_context);
Fam Zhengda763e82015-10-23 11:08:10 +08001674 bdrv_drained_begin(state->old_bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001675
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001676 if (!bdrv_is_inserted(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001677 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001678 return;
1679 }
1680
Fam Zheng3718d8a2014-05-23 21:29:43 +08001681 if (bdrv_op_is_blocked(state->old_bs,
1682 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001683 return;
1684 }
1685
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001686 if (!bdrv_is_read_only(state->old_bs)) {
1687 if (bdrv_flush(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001688 error_setg(errp, QERR_IO_ERROR);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001689 return;
1690 }
1691 }
1692
Benoît Canet212a5a82014-01-23 21:31:36 +01001693 if (!bdrv_is_first_non_filter(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001694 error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
Benoît Canetf6186f42013-10-02 14:33:48 +02001695 return;
1696 }
1697
Alberto Garcia43de7e22015-10-26 14:27:16 +02001698 if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
Eric Blake32bafa82016-03-17 16:48:37 -06001699 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001700 const char *format = s->has_format ? s->format : "qcow2";
1701 enum NewImageMode mode;
1702 const char *snapshot_node_name =
1703 s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001704
Alberto Garcia43de7e22015-10-26 14:27:16 +02001705 if (node_name && !snapshot_node_name) {
1706 error_setg(errp, "New snapshot node name missing");
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001707 return;
1708 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001709
1710 if (snapshot_node_name &&
1711 bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
1712 error_setg(errp, "New snapshot node name already in use");
1713 return;
1714 }
1715
1716 flags = state->old_bs->open_flags;
Kevin Wolf4c844982016-02-29 13:12:26 +01001717 flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | BDRV_O_COPY_ON_READ);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001718
1719 /* create new image w/backing file */
1720 mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1721 if (mode != NEW_IMAGE_MODE_EXISTING) {
Kevin Wolff86b8b52016-03-02 12:16:44 +01001722 int64_t size = bdrv_getlength(state->old_bs);
1723 if (size < 0) {
1724 error_setg_errno(errp, -size, "bdrv_getlength failed");
1725 return;
1726 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001727 bdrv_img_create(new_image_file, format,
1728 state->old_bs->filename,
1729 state->old_bs->drv->format_name,
Kevin Wolff86b8b52016-03-02 12:16:44 +01001730 NULL, size, flags, &local_err, false);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001731 if (local_err) {
1732 error_propagate(errp, local_err);
1733 return;
1734 }
1735 }
1736
1737 options = qdict_new();
1738 if (s->has_snapshot_node_name) {
1739 qdict_put(options, "node-name",
1740 qstring_from_str(snapshot_node_name));
1741 }
1742 qdict_put(options, "driver", qstring_from_str(format));
1743
1744 flags |= BDRV_O_NO_BACKING;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001745 }
1746
Max Reitz5b363932016-05-17 16:41:31 +02001747 state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags,
1748 errp);
Max Reitzf67503e2014-02-18 18:33:05 +01001749 /* We will manually add the backing_hd field to the bs later */
Max Reitz5b363932016-05-17 16:41:31 +02001750 if (!state->new_bs) {
Alberto Garcia43de7e22015-10-26 14:27:16 +02001751 return;
1752 }
1753
Kevin Wolf1f0c4612016-03-22 18:38:44 +01001754 if (bdrv_has_blk(state->new_bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02001755 error_setg(errp, "The snapshot is already in use");
Alberto Garcia43de7e22015-10-26 14:27:16 +02001756 return;
1757 }
1758
1759 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1760 errp)) {
1761 return;
1762 }
1763
1764 if (state->new_bs->backing != NULL) {
1765 error_setg(errp, "The snapshot already has a backing image");
Alberto Garcia08b24cf2015-11-03 12:32:35 +02001766 return;
1767 }
1768
1769 if (!state->new_bs->drv->supports_backing) {
1770 error_setg(errp, "The snapshot does not support backing images");
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001771 }
1772}
1773
John Snow50f43f02015-11-05 18:13:09 -05001774static void external_snapshot_commit(BlkActionState *common)
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001775{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001776 ExternalSnapshotState *state =
1777 DO_UPCAST(ExternalSnapshotState, common, common);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001778
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001779 bdrv_set_aio_context(state->new_bs, state->aio_context);
1780
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001781 /* This removes our old bs and adds the new bs */
1782 bdrv_append(state->new_bs, state->old_bs);
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001783 /* We don't need (or want) to use the transactional
1784 * bdrv_reopen_multiple() across all the entries at once, because we
1785 * don't want to abort all of them if one of them fails the reopen */
Kevin Wolf4c844982016-02-29 13:12:26 +01001786 if (!state->old_bs->copy_on_read) {
1787 bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
1788 NULL);
1789 }
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001790}
1791
John Snow50f43f02015-11-05 18:13:09 -05001792static void external_snapshot_abort(BlkActionState *common)
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001793{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001794 ExternalSnapshotState *state =
1795 DO_UPCAST(ExternalSnapshotState, common, common);
1796 if (state->new_bs) {
Fam Zheng4f6fd342013-08-23 09:14:47 +08001797 bdrv_unref(state->new_bs);
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001798 }
Fam Zhengda763e82015-10-23 11:08:10 +08001799}
1800
John Snow50f43f02015-11-05 18:13:09 -05001801static void external_snapshot_clean(BlkActionState *common)
Fam Zhengda763e82015-10-23 11:08:10 +08001802{
1803 ExternalSnapshotState *state =
1804 DO_UPCAST(ExternalSnapshotState, common, common);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001805 if (state->aio_context) {
Fam Zhengda763e82015-10-23 11:08:10 +08001806 bdrv_drained_end(state->old_bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001807 aio_context_release(state->aio_context);
1808 }
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001809}
1810
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001811typedef struct DriveBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001812 BlkActionState common;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001813 BlockDriverState *bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001814 AioContext *aio_context;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001815 BlockJob *job;
1816} DriveBackupState;
1817
John Snow111049a2016-11-08 01:50:38 -05001818static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
Pavel Butsykin81206a82016-07-22 11:17:50 +03001819 Error **errp);
John Snow78f51fd2015-11-05 18:13:17 -05001820
John Snow50f43f02015-11-05 18:13:09 -05001821static void drive_backup_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001822{
1823 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001824 BlockDriverState *bs;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001825 DriveBackup *backup;
1826 Error *local_err = NULL;
1827
Eric Blake6a8f9662015-10-26 16:34:54 -06001828 assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001829 backup = common->action->u.drive_backup.data;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001830
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001831 bs = qmp_get_root_bs(backup->device, errp);
1832 if (!bs) {
Fam Zheng1fdd4b72015-10-23 11:08:11 +08001833 return;
1834 }
1835
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001836 /* AioContext is released in .clean() */
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001837 state->aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001838 aio_context_acquire(state->aio_context);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001839 bdrv_drained_begin(bs);
1840 state->bs = bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001841
John Snow111049a2016-11-08 01:50:38 -05001842 state->job = do_drive_backup(backup, common->block_job_txn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001843 if (local_err) {
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001844 error_propagate(errp, local_err);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001845 return;
1846 }
John Snow111049a2016-11-08 01:50:38 -05001847}
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001848
John Snow111049a2016-11-08 01:50:38 -05001849static void drive_backup_commit(BlkActionState *common)
1850{
1851 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1852 assert(state->job);
1853 block_job_start(state->job);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001854}
1855
John Snow50f43f02015-11-05 18:13:09 -05001856static void drive_backup_abort(BlkActionState *common)
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001857{
1858 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001859
John Snow111049a2016-11-08 01:50:38 -05001860 if (state->job) {
1861 block_job_cancel_sync(state->job);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001862 }
1863}
1864
John Snow50f43f02015-11-05 18:13:09 -05001865static void drive_backup_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001866{
1867 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1868
1869 if (state->aio_context) {
Fam Zheng1fdd4b72015-10-23 11:08:11 +08001870 bdrv_drained_end(state->bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001871 aio_context_release(state->aio_context);
1872 }
1873}
1874
Fam Zhengbd8baec2014-12-18 18:37:06 +08001875typedef struct BlockdevBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001876 BlkActionState common;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001877 BlockDriverState *bs;
1878 BlockJob *job;
1879 AioContext *aio_context;
1880} BlockdevBackupState;
1881
John Snow111049a2016-11-08 01:50:38 -05001882static BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
1883 Error **errp);
John Snow78f51fd2015-11-05 18:13:17 -05001884
John Snow50f43f02015-11-05 18:13:09 -05001885static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001886{
1887 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1888 BlockdevBackup *backup;
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001889 BlockDriverState *bs, *target;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001890 Error *local_err = NULL;
1891
Eric Blake6a8f9662015-10-26 16:34:54 -06001892 assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001893 backup = common->action->u.blockdev_backup.data;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001894
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001895 bs = qmp_get_root_bs(backup->device, errp);
1896 if (!bs) {
Fam Zhengff52bf32015-10-23 11:08:12 +08001897 return;
1898 }
1899
Kevin Wolf39d990a2016-08-02 19:22:04 +02001900 target = bdrv_lookup_bs(backup->target, backup->target, errp);
Max Reitz5433c242015-10-19 17:53:29 +02001901 if (!target) {
Fam Zhengbd8baec2014-12-18 18:37:06 +08001902 return;
1903 }
1904
1905 /* AioContext is released in .clean() */
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001906 state->aio_context = bdrv_get_aio_context(bs);
Kevin Wolf39d990a2016-08-02 19:22:04 +02001907 if (state->aio_context != bdrv_get_aio_context(target)) {
Fam Zhengbd8baec2014-12-18 18:37:06 +08001908 state->aio_context = NULL;
1909 error_setg(errp, "Backup between two IO threads is not implemented");
1910 return;
1911 }
1912 aio_context_acquire(state->aio_context);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001913 state->bs = bs;
Fam Zhengff52bf32015-10-23 11:08:12 +08001914 bdrv_drained_begin(state->bs);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001915
John Snow111049a2016-11-08 01:50:38 -05001916 state->job = do_blockdev_backup(backup, common->block_job_txn, &local_err);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001917 if (local_err) {
1918 error_propagate(errp, local_err);
1919 return;
1920 }
John Snow111049a2016-11-08 01:50:38 -05001921}
Fam Zhengbd8baec2014-12-18 18:37:06 +08001922
John Snow111049a2016-11-08 01:50:38 -05001923static void blockdev_backup_commit(BlkActionState *common)
1924{
1925 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1926 assert(state->job);
1927 block_job_start(state->job);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001928}
1929
John Snow50f43f02015-11-05 18:13:09 -05001930static void blockdev_backup_abort(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001931{
1932 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001933
John Snow111049a2016-11-08 01:50:38 -05001934 if (state->job) {
1935 block_job_cancel_sync(state->job);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001936 }
1937}
1938
John Snow50f43f02015-11-05 18:13:09 -05001939static void blockdev_backup_clean(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001940{
1941 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1942
1943 if (state->aio_context) {
Fam Zhengff52bf32015-10-23 11:08:12 +08001944 bdrv_drained_end(state->bs);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001945 aio_context_release(state->aio_context);
1946 }
1947}
1948
Fam Zhengdf9a6812015-11-09 18:16:54 +08001949typedef struct BlockDirtyBitmapState {
John Snow50f43f02015-11-05 18:13:09 -05001950 BlkActionState common;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001951 BdrvDirtyBitmap *bitmap;
1952 BlockDriverState *bs;
1953 AioContext *aio_context;
1954 HBitmap *backup;
1955 bool prepared;
1956} BlockDirtyBitmapState;
1957
John Snow50f43f02015-11-05 18:13:09 -05001958static void block_dirty_bitmap_add_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08001959 Error **errp)
1960{
1961 Error *local_err = NULL;
1962 BlockDirtyBitmapAdd *action;
1963 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1964 common, common);
1965
John Snow94d16a62015-11-05 18:13:18 -05001966 if (action_check_completion_mode(common, errp) < 0) {
1967 return;
1968 }
1969
Eric Blake32bafa82016-03-17 16:48:37 -06001970 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001971 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
1972 qmp_block_dirty_bitmap_add(action->node, action->name,
1973 action->has_granularity, action->granularity,
1974 &local_err);
1975
1976 if (!local_err) {
1977 state->prepared = true;
1978 } else {
1979 error_propagate(errp, local_err);
1980 }
1981}
1982
John Snow50f43f02015-11-05 18:13:09 -05001983static void block_dirty_bitmap_add_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08001984{
1985 BlockDirtyBitmapAdd *action;
1986 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1987 common, common);
1988
Eric Blake32bafa82016-03-17 16:48:37 -06001989 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001990 /* Should not be able to fail: IF the bitmap was added via .prepare(),
1991 * then the node reference and bitmap name must have been valid.
1992 */
1993 if (state->prepared) {
1994 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
1995 }
1996}
1997
John Snow50f43f02015-11-05 18:13:09 -05001998static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08001999 Error **errp)
2000{
2001 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2002 common, common);
2003 BlockDirtyBitmap *action;
2004
John Snow94d16a62015-11-05 18:13:18 -05002005 if (action_check_completion_mode(common, errp) < 0) {
2006 return;
2007 }
2008
Eric Blake32bafa82016-03-17 16:48:37 -06002009 action = common->action->u.block_dirty_bitmap_clear.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002010 state->bitmap = block_dirty_bitmap_lookup(action->node,
2011 action->name,
2012 &state->bs,
2013 &state->aio_context,
2014 errp);
2015 if (!state->bitmap) {
2016 return;
2017 }
2018
2019 if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
2020 error_setg(errp, "Cannot modify a frozen bitmap");
2021 return;
2022 } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
2023 error_setg(errp, "Cannot clear a disabled bitmap");
2024 return;
2025 }
2026
2027 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
2028 /* AioContext is released in .clean() */
2029}
2030
John Snow50f43f02015-11-05 18:13:09 -05002031static void block_dirty_bitmap_clear_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002032{
2033 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2034 common, common);
2035
2036 bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
2037}
2038
John Snow50f43f02015-11-05 18:13:09 -05002039static void block_dirty_bitmap_clear_commit(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002040{
2041 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2042 common, common);
2043
2044 hbitmap_free(state->backup);
2045}
2046
John Snow50f43f02015-11-05 18:13:09 -05002047static void block_dirty_bitmap_clear_clean(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002048{
2049 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2050 common, common);
2051
2052 if (state->aio_context) {
2053 aio_context_release(state->aio_context);
2054 }
2055}
2056
John Snow50f43f02015-11-05 18:13:09 -05002057static void abort_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002058{
2059 error_setg(errp, "Transaction aborted using Abort action");
2060}
2061
John Snow50f43f02015-11-05 18:13:09 -05002062static void abort_commit(BlkActionState *common)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002063{
Stefan Weildfc6f862013-07-25 18:21:28 +02002064 g_assert_not_reached(); /* this action never succeeds */
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002065}
2066
John Snow50f43f02015-11-05 18:13:09 -05002067static const BlkActionOps actions[] = {
Alberto Garcia43de7e22015-10-26 14:27:16 +02002068 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2069 .instance_size = sizeof(ExternalSnapshotState),
2070 .prepare = external_snapshot_prepare,
2071 .commit = external_snapshot_commit,
2072 .abort = external_snapshot_abort,
Alberto Garcia4ad6f3d2015-11-13 15:00:24 +02002073 .clean = external_snapshot_clean,
Alberto Garcia43de7e22015-10-26 14:27:16 +02002074 },
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002075 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002076 .instance_size = sizeof(ExternalSnapshotState),
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002077 .prepare = external_snapshot_prepare,
2078 .commit = external_snapshot_commit,
2079 .abort = external_snapshot_abort,
Fam Zhengda763e82015-10-23 11:08:10 +08002080 .clean = external_snapshot_clean,
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002081 },
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002082 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2083 .instance_size = sizeof(DriveBackupState),
2084 .prepare = drive_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002085 .commit = drive_backup_commit,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002086 .abort = drive_backup_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002087 .clean = drive_backup_clean,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002088 },
Fam Zhengbd8baec2014-12-18 18:37:06 +08002089 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2090 .instance_size = sizeof(BlockdevBackupState),
2091 .prepare = blockdev_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002092 .commit = blockdev_backup_commit,
Fam Zhengbd8baec2014-12-18 18:37:06 +08002093 .abort = blockdev_backup_abort,
2094 .clean = blockdev_backup_clean,
2095 },
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002096 [TRANSACTION_ACTION_KIND_ABORT] = {
John Snow50f43f02015-11-05 18:13:09 -05002097 .instance_size = sizeof(BlkActionState),
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002098 .prepare = abort_prepare,
2099 .commit = abort_commit,
2100 },
Wenchao Xiabbe86012013-09-11 14:04:34 +08002101 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2102 .instance_size = sizeof(InternalSnapshotState),
2103 .prepare = internal_snapshot_prepare,
2104 .abort = internal_snapshot_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002105 .clean = internal_snapshot_clean,
Wenchao Xiabbe86012013-09-11 14:04:34 +08002106 },
Fam Zhengdf9a6812015-11-09 18:16:54 +08002107 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2108 .instance_size = sizeof(BlockDirtyBitmapState),
2109 .prepare = block_dirty_bitmap_add_prepare,
2110 .abort = block_dirty_bitmap_add_abort,
2111 },
2112 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2113 .instance_size = sizeof(BlockDirtyBitmapState),
2114 .prepare = block_dirty_bitmap_clear_prepare,
2115 .commit = block_dirty_bitmap_clear_commit,
2116 .abort = block_dirty_bitmap_clear_abort,
2117 .clean = block_dirty_bitmap_clear_clean,
2118 }
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002119};
2120
John Snow94d16a62015-11-05 18:13:18 -05002121/**
2122 * Allocate a TransactionProperties structure if necessary, and fill
2123 * that structure with desired defaults if they are unset.
2124 */
2125static TransactionProperties *get_transaction_properties(
2126 TransactionProperties *props)
2127{
2128 if (!props) {
2129 props = g_new0(TransactionProperties, 1);
2130 }
2131
2132 if (!props->has_completion_mode) {
2133 props->has_completion_mode = true;
2134 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2135 }
2136
2137 return props;
2138}
2139
Jeff Cody8802d1f2012-02-28 15:54:06 -05002140/*
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002141 * 'Atomic' group operations. The operations are performed as a set, and if
2142 * any fail then we roll back all operations in the group.
Jeff Cody8802d1f2012-02-28 15:54:06 -05002143 */
John Snow94d16a62015-11-05 18:13:18 -05002144void qmp_transaction(TransactionActionList *dev_list,
2145 bool has_props,
2146 struct TransactionProperties *props,
2147 Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -05002148{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002149 TransactionActionList *dev_entry = dev_list;
John Snow94d16a62015-11-05 18:13:18 -05002150 BlockJobTxn *block_job_txn = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002151 BlkActionState *state, *next;
Luiz Capitulino43e17042012-11-30 10:52:07 -02002152 Error *local_err = NULL;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002153
John Snow50f43f02015-11-05 18:13:09 -05002154 QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002155 QSIMPLEQ_INIT(&snap_bdrv_states);
2156
John Snow94d16a62015-11-05 18:13:18 -05002157 /* Does this transaction get canceled as a group on failure?
2158 * If not, we don't really need to make a BlockJobTxn.
2159 */
2160 props = get_transaction_properties(props);
2161 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
2162 block_job_txn = block_job_txn_new();
2163 }
2164
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002165 /* drain all i/o before any operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002166 bdrv_drain_all();
2167
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002168 /* We don't do anything in this loop that commits us to the operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002169 while (NULL != dev_entry) {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002170 TransactionAction *dev_info = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002171 const BlkActionOps *ops;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002172
Jeff Cody8802d1f2012-02-28 15:54:06 -05002173 dev_info = dev_entry->value;
2174 dev_entry = dev_entry->next;
2175
Eric Blake6a8f9662015-10-26 16:34:54 -06002176 assert(dev_info->type < ARRAY_SIZE(actions));
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002177
Eric Blake6a8f9662015-10-26 16:34:54 -06002178 ops = &actions[dev_info->type];
Max Reitzaa3fe712013-09-12 14:57:27 +02002179 assert(ops->instance_size > 0);
2180
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002181 state = g_malloc0(ops->instance_size);
2182 state->ops = ops;
2183 state->action = dev_info;
John Snow94d16a62015-11-05 18:13:18 -05002184 state->block_job_txn = block_job_txn;
2185 state->txn_props = props;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002186 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002187
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002188 state->ops->prepare(state, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002189 if (local_err) {
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002190 error_propagate(errp, local_err);
2191 goto delete_and_fail;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002192 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002193 }
2194
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002195 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02002196 if (state->ops->commit) {
2197 state->ops->commit(state);
2198 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002199 }
2200
2201 /* success */
2202 goto exit;
2203
2204delete_and_fail:
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002205 /* failure, and it is all-or-none; roll back all operations */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002206 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2207 if (state->ops->abort) {
2208 state->ops->abort(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002209 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002210 }
2211exit:
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002212 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
2213 if (state->ops->clean) {
2214 state->ops->clean(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002215 }
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002216 g_free(state);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002217 }
John Snow94d16a62015-11-05 18:13:18 -05002218 if (!has_props) {
2219 qapi_free_TransactionProperties(props);
2220 }
2221 block_job_txn_unref(block_job_txn);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002222}
2223
Kevin Wolffbe2d812016-09-20 13:38:46 +02002224void qmp_eject(bool has_device, const char *device,
2225 bool has_id, const char *id,
2226 bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002227{
Max Reitz38f54bd2015-10-26 21:39:12 +01002228 Error *local_err = NULL;
John Snow3a3086b2016-05-18 17:53:40 -04002229 int rc;
Markus Armbruster666daa62010-06-02 18:48:27 +02002230
John Snow3a3086b2016-05-18 17:53:40 -04002231 if (!has_force) {
2232 force = false;
2233 }
2234
Kevin Wolffbe2d812016-09-20 13:38:46 +02002235 rc = do_open_tray(has_device ? device : NULL,
2236 has_id ? id : NULL,
2237 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002238 if (rc && rc != -ENOSYS) {
Max Reitz38f54bd2015-10-26 21:39:12 +01002239 error_propagate(errp, local_err);
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02002240 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002241 }
Colin Lordbf18bee2016-06-06 14:15:22 -04002242 error_free(local_err);
John Snow3a3086b2016-05-18 17:53:40 -04002243
Kevin Wolffbe2d812016-09-20 13:38:46 +02002244 qmp_x_blockdev_remove_medium(has_device, device, has_id, id, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02002245}
2246
Benoît Canet12d3ba82014-01-23 21:31:35 +01002247void qmp_block_passwd(bool has_device, const char *device,
2248 bool has_node_name, const char *node_name,
2249 const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002250{
Benoît Canet12d3ba82014-01-23 21:31:35 +01002251 Error *local_err = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +02002252 BlockDriverState *bs;
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002253 AioContext *aio_context;
Markus Armbruster666daa62010-06-02 18:48:27 +02002254
Benoît Canet12d3ba82014-01-23 21:31:35 +01002255 bs = bdrv_lookup_bs(has_device ? device : NULL,
2256 has_node_name ? node_name : NULL,
2257 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002258 if (local_err) {
Benoît Canet12d3ba82014-01-23 21:31:35 +01002259 error_propagate(errp, local_err);
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -02002260 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002261 }
2262
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002263 aio_context = bdrv_get_aio_context(bs);
2264 aio_context_acquire(aio_context);
2265
Markus Armbruster4d2855a2015-01-29 10:37:00 +01002266 bdrv_add_key(bs, password, errp);
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002267
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002268 aio_context_release(aio_context);
Markus Armbruster666daa62010-06-02 18:48:27 +02002269}
2270
Colin Lordbf18bee2016-06-06 14:15:22 -04002271/*
2272 * Attempt to open the tray of @device.
2273 * If @force, ignore its tray lock.
2274 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2275 * On error, store an error through @errp and return -errno.
2276 * If @device does not exist, return -ENODEV.
2277 * If it has no removable media, return -ENOTSUP.
2278 * If it has no tray, return -ENOSYS.
2279 * If the guest was asked to open the tray, return -EINPROGRESS.
2280 * Else, return 0.
John Snow3a3086b2016-05-18 17:53:40 -04002281 */
Kevin Wolfb33945c2016-09-20 13:38:43 +02002282static int do_open_tray(const char *blk_name, const char *qdev_id,
2283 bool force, Error **errp)
Max Reitz7d8a9f72015-10-26 21:39:08 +01002284{
2285 BlockBackend *blk;
Kevin Wolfb33945c2016-09-20 13:38:43 +02002286 const char *device = qdev_id ?: blk_name;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002287 bool locked;
2288
Kevin Wolfb33945c2016-09-20 13:38:43 +02002289 blk = qmp_get_blk(blk_name, qdev_id, errp);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002290 if (!blk) {
John Snow3a3086b2016-05-18 17:53:40 -04002291 return -ENODEV;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002292 }
2293
2294 if (!blk_dev_has_removable_media(blk)) {
2295 error_setg(errp, "Device '%s' is not removable", device);
John Snow3a3086b2016-05-18 17:53:40 -04002296 return -ENOTSUP;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002297 }
2298
Max Reitz12c7ec82016-01-29 20:49:11 +01002299 if (!blk_dev_has_tray(blk)) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002300 error_setg(errp, "Device '%s' does not have a tray", device);
2301 return -ENOSYS;
Max Reitz12c7ec82016-01-29 20:49:11 +01002302 }
2303
Max Reitz7d8a9f72015-10-26 21:39:08 +01002304 if (blk_dev_is_tray_open(blk)) {
John Snow3a3086b2016-05-18 17:53:40 -04002305 return 0;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002306 }
2307
2308 locked = blk_dev_is_medium_locked(blk);
2309 if (locked) {
2310 blk_dev_eject_request(blk, force);
2311 }
2312
2313 if (!locked || force) {
Kevin Wolf39829a02017-01-24 14:21:41 +01002314 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002315 }
John Snow3a3086b2016-05-18 17:53:40 -04002316
2317 if (locked && !force) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002318 error_setg(errp, "Device '%s' is locked and force was not specified, "
2319 "wait for tray to open and try again", device);
2320 return -EINPROGRESS;
John Snow3a3086b2016-05-18 17:53:40 -04002321 }
2322
2323 return 0;
2324}
2325
Kevin Wolfb33945c2016-09-20 13:38:43 +02002326void qmp_blockdev_open_tray(bool has_device, const char *device,
2327 bool has_id, const char *id,
2328 bool has_force, bool force,
John Snow3a3086b2016-05-18 17:53:40 -04002329 Error **errp)
2330{
Colin Lordbf18bee2016-06-06 14:15:22 -04002331 Error *local_err = NULL;
2332 int rc;
2333
John Snow3a3086b2016-05-18 17:53:40 -04002334 if (!has_force) {
2335 force = false;
2336 }
Kevin Wolfb33945c2016-09-20 13:38:43 +02002337 rc = do_open_tray(has_device ? device : NULL,
2338 has_id ? id : NULL,
2339 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002340 if (rc && rc != -ENOSYS && rc != -EINPROGRESS) {
2341 error_propagate(errp, local_err);
2342 return;
2343 }
2344 error_free(local_err);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002345}
2346
Kevin Wolfb33945c2016-09-20 13:38:43 +02002347void qmp_blockdev_close_tray(bool has_device, const char *device,
2348 bool has_id, const char *id,
2349 Error **errp)
Max Reitzabaaf592015-10-26 21:39:09 +01002350{
2351 BlockBackend *blk;
Kevin Wolf39829a02017-01-24 14:21:41 +01002352 Error *local_err = NULL;
Max Reitzabaaf592015-10-26 21:39:09 +01002353
Kevin Wolfb33945c2016-09-20 13:38:43 +02002354 device = has_device ? device : NULL;
2355 id = has_id ? id : NULL;
2356
2357 blk = qmp_get_blk(device, id, errp);
Max Reitzabaaf592015-10-26 21:39:09 +01002358 if (!blk) {
Max Reitzabaaf592015-10-26 21:39:09 +01002359 return;
2360 }
2361
2362 if (!blk_dev_has_removable_media(blk)) {
Kevin Wolfb33945c2016-09-20 13:38:43 +02002363 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitzabaaf592015-10-26 21:39:09 +01002364 return;
2365 }
2366
Max Reitz12c7ec82016-01-29 20:49:11 +01002367 if (!blk_dev_has_tray(blk)) {
2368 /* Ignore this command on tray-less devices */
2369 return;
2370 }
2371
Max Reitzabaaf592015-10-26 21:39:09 +01002372 if (!blk_dev_is_tray_open(blk)) {
2373 return;
2374 }
2375
Kevin Wolf39829a02017-01-24 14:21:41 +01002376 blk_dev_change_media_cb(blk, true, &local_err);
2377 if (local_err) {
2378 error_propagate(errp, local_err);
2379 return;
2380 }
Max Reitzabaaf592015-10-26 21:39:09 +01002381}
2382
Kevin Wolf00949ba2016-09-20 13:38:45 +02002383void qmp_x_blockdev_remove_medium(bool has_device, const char *device,
2384 bool has_id, const char *id, Error **errp)
Max Reitz2814f672015-10-26 21:39:10 +01002385{
2386 BlockBackend *blk;
2387 BlockDriverState *bs;
2388 AioContext *aio_context;
Kevin Wolf00949ba2016-09-20 13:38:45 +02002389 bool has_attached_device;
Max Reitz2814f672015-10-26 21:39:10 +01002390
Kevin Wolf00949ba2016-09-20 13:38:45 +02002391 device = has_device ? device : NULL;
2392 id = has_id ? id : NULL;
2393
2394 blk = qmp_get_blk(device, id, errp);
Max Reitz2814f672015-10-26 21:39:10 +01002395 if (!blk) {
Max Reitz2814f672015-10-26 21:39:10 +01002396 return;
2397 }
2398
2399 /* For BBs without a device, we can exchange the BDS tree at will */
Kevin Wolf00949ba2016-09-20 13:38:45 +02002400 has_attached_device = blk_get_attached_dev(blk);
Max Reitz2814f672015-10-26 21:39:10 +01002401
Kevin Wolf00949ba2016-09-20 13:38:45 +02002402 if (has_attached_device && !blk_dev_has_removable_media(blk)) {
2403 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002404 return;
2405 }
2406
Kevin Wolf00949ba2016-09-20 13:38:45 +02002407 if (has_attached_device && blk_dev_has_tray(blk) &&
2408 !blk_dev_is_tray_open(blk))
2409 {
2410 error_setg(errp, "Tray of device '%s' is not open", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002411 return;
2412 }
2413
2414 bs = blk_bs(blk);
2415 if (!bs) {
2416 return;
2417 }
2418
2419 aio_context = bdrv_get_aio_context(bs);
2420 aio_context_acquire(aio_context);
2421
2422 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2423 goto out;
2424 }
2425
Max Reitz2814f672015-10-26 21:39:10 +01002426 blk_remove_bs(blk);
2427
Max Reitz12c7ec82016-01-29 20:49:11 +01002428 if (!blk_dev_has_tray(blk)) {
2429 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2430 * called at all); therefore, the medium needs to be ejected here.
2431 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2432 * value passed here (i.e. false). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002433 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz12c7ec82016-01-29 20:49:11 +01002434 }
2435
Max Reitz2814f672015-10-26 21:39:10 +01002436out:
2437 aio_context_release(aio_context);
2438}
2439
Kevin Wolf716df212016-09-20 13:38:44 +02002440static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
Max Reitzd1299882015-10-26 21:39:11 +01002441 BlockDriverState *bs, Error **errp)
2442{
Kevin Wolf39829a02017-01-24 14:21:41 +01002443 Error *local_err = NULL;
Max Reitzd1299882015-10-26 21:39:11 +01002444 bool has_device;
Kevin Wolfd7086422017-01-13 19:02:32 +01002445 int ret;
Max Reitzd1299882015-10-26 21:39:11 +01002446
Max Reitzd1299882015-10-26 21:39:11 +01002447 /* For BBs without a device, we can exchange the BDS tree at will */
2448 has_device = blk_get_attached_dev(blk);
2449
2450 if (has_device && !blk_dev_has_removable_media(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002451 error_setg(errp, "Device is not removable");
Max Reitzd1299882015-10-26 21:39:11 +01002452 return;
2453 }
2454
Max Reitz12c7ec82016-01-29 20:49:11 +01002455 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002456 error_setg(errp, "Tray of the device is not open");
Max Reitzd1299882015-10-26 21:39:11 +01002457 return;
2458 }
2459
2460 if (blk_bs(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002461 error_setg(errp, "There already is a medium in the device");
Max Reitzd1299882015-10-26 21:39:11 +01002462 return;
2463 }
2464
Kevin Wolfd7086422017-01-13 19:02:32 +01002465 ret = blk_insert_bs(blk, bs, errp);
2466 if (ret < 0) {
2467 return;
2468 }
Max Reitzd1299882015-10-26 21:39:11 +01002469
Max Reitz12c7ec82016-01-29 20:49:11 +01002470 if (!blk_dev_has_tray(blk)) {
2471 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2472 * called at all); therefore, the medium needs to be pushed into the
2473 * slot here.
2474 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2475 * value passed here (i.e. true). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002476 blk_dev_change_media_cb(blk, true, &local_err);
2477 if (local_err) {
2478 error_propagate(errp, local_err);
2479 blk_remove_bs(blk);
2480 return;
2481 }
Max Reitz12c7ec82016-01-29 20:49:11 +01002482 }
Max Reitzd1299882015-10-26 21:39:11 +01002483}
2484
Kevin Wolf716df212016-09-20 13:38:44 +02002485void qmp_x_blockdev_insert_medium(bool has_device, const char *device,
2486 bool has_id, const char *id,
2487 const char *node_name, Error **errp)
Max Reitzd1299882015-10-26 21:39:11 +01002488{
Kevin Wolf716df212016-09-20 13:38:44 +02002489 BlockBackend *blk;
Max Reitzd1299882015-10-26 21:39:11 +01002490 BlockDriverState *bs;
2491
Kevin Wolf716df212016-09-20 13:38:44 +02002492 blk = qmp_get_blk(has_device ? device : NULL,
2493 has_id ? id : NULL,
2494 errp);
2495 if (!blk) {
2496 return;
2497 }
2498
Max Reitzd1299882015-10-26 21:39:11 +01002499 bs = bdrv_find_node(node_name);
2500 if (!bs) {
2501 error_setg(errp, "Node '%s' not found", node_name);
2502 return;
2503 }
2504
Kevin Wolf1f0c4612016-03-22 18:38:44 +01002505 if (bdrv_has_blk(bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02002506 error_setg(errp, "Node '%s' is already in use", node_name);
Max Reitzd1299882015-10-26 21:39:11 +01002507 return;
2508 }
2509
Kevin Wolf716df212016-09-20 13:38:44 +02002510 qmp_blockdev_insert_anon_medium(blk, bs, errp);
Max Reitzd1299882015-10-26 21:39:11 +01002511}
2512
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002513void qmp_blockdev_change_medium(bool has_device, const char *device,
2514 bool has_id, const char *id,
2515 const char *filename,
Max Reitz24fb4132015-11-06 16:27:06 +01002516 bool has_format, const char *format,
Max Reitz39ff43d2015-11-11 04:49:44 +01002517 bool has_read_only,
2518 BlockdevChangeReadOnlyMode read_only,
Max Reitz24fb4132015-11-06 16:27:06 +01002519 Error **errp)
Max Reitzde2c6c02015-10-26 21:39:13 +01002520{
2521 BlockBackend *blk;
2522 BlockDriverState *medium_bs = NULL;
Max Reitz5b363932016-05-17 16:41:31 +02002523 int bdrv_flags;
Kevin Wolfb85114f2016-09-12 19:08:31 +02002524 bool detect_zeroes;
Colin Lord38a53d52016-06-08 13:56:28 -04002525 int rc;
Max Reitzde2c6c02015-10-26 21:39:13 +01002526 QDict *options = NULL;
2527 Error *err = NULL;
2528
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002529 blk = qmp_get_blk(has_device ? device : NULL,
2530 has_id ? id : NULL,
2531 errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002532 if (!blk) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002533 goto fail;
2534 }
2535
2536 if (blk_bs(blk)) {
2537 blk_update_root_state(blk);
2538 }
2539
2540 bdrv_flags = blk_get_open_flags_from_root_state(blk);
Alyssa Milburn156abc22016-02-06 13:36:18 +00002541 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
2542 BDRV_O_PROTOCOL);
Max Reitzde2c6c02015-10-26 21:39:13 +01002543
Max Reitz39ff43d2015-11-11 04:49:44 +01002544 if (!has_read_only) {
2545 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2546 }
2547
2548 switch (read_only) {
2549 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2550 break;
2551
2552 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2553 bdrv_flags &= ~BDRV_O_RDWR;
2554 break;
2555
2556 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2557 bdrv_flags |= BDRV_O_RDWR;
2558 break;
2559
2560 default:
2561 abort();
2562 }
2563
Kevin Wolfb85114f2016-09-12 19:08:31 +02002564 options = qdict_new();
2565 detect_zeroes = blk_get_detect_zeroes_from_root_state(blk);
2566 qdict_put(options, "detect-zeroes",
2567 qstring_from_str(detect_zeroes ? "on" : "off"));
2568
Max Reitz24fb4132015-11-06 16:27:06 +01002569 if (has_format) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002570 qdict_put(options, "driver", qstring_from_str(format));
2571 }
2572
Max Reitz5b363932016-05-17 16:41:31 +02002573 medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp);
2574 if (!medium_bs) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002575 goto fail;
2576 }
2577
Max Reitzde2c6c02015-10-26 21:39:13 +01002578 bdrv_add_key(medium_bs, NULL, &err);
2579 if (err) {
2580 error_propagate(errp, err);
2581 goto fail;
2582 }
2583
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002584 rc = do_open_tray(has_device ? device : NULL,
2585 has_id ? id : NULL,
2586 false, &err);
Colin Lord38a53d52016-06-08 13:56:28 -04002587 if (rc && rc != -ENOSYS) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002588 error_propagate(errp, err);
2589 goto fail;
2590 }
Colin Lord38a53d52016-06-08 13:56:28 -04002591 error_free(err);
2592 err = NULL;
Max Reitzde2c6c02015-10-26 21:39:13 +01002593
Kevin Wolf24df38b2016-09-26 15:03:00 +02002594 qmp_x_blockdev_remove_medium(has_device, device, has_id, id, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002595 if (err) {
2596 error_propagate(errp, err);
2597 goto fail;
2598 }
2599
Kevin Wolf716df212016-09-20 13:38:44 +02002600 qmp_blockdev_insert_anon_medium(blk, medium_bs, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002601 if (err) {
2602 error_propagate(errp, err);
2603 goto fail;
2604 }
2605
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002606 qmp_blockdev_close_tray(has_device, device, has_id, id, errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002607
2608fail:
2609 /* If the medium has been inserted, the device has its own reference, so
2610 * ours must be relinquished; and if it has not been inserted successfully,
2611 * the reference must be relinquished anyway */
2612 bdrv_unref(medium_bs);
2613}
2614
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002615/* throttling disk I/O limits */
Eric Blake4dc93972016-07-13 21:50:21 -06002616void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002617{
Benoît Canetcc0681c2013-09-02 14:14:39 +02002618 ThrottleConfig cfg;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002619 BlockDriverState *bs;
Fam Zhenga0e85442015-03-02 19:36:48 +08002620 BlockBackend *blk;
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002621 AioContext *aio_context;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002622
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002623 blk = qmp_get_blk(arg->has_device ? arg->device : NULL,
2624 arg->has_id ? arg->id : NULL,
2625 errp);
Fam Zhenga0e85442015-03-02 19:36:48 +08002626 if (!blk) {
Luiz Capitulino80047da2011-12-14 16:49:14 -02002627 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002628 }
Max Reitz5433c242015-10-19 17:53:29 +02002629
2630 aio_context = blk_get_aio_context(blk);
2631 aio_context_acquire(aio_context);
2632
Fam Zhenga0e85442015-03-02 19:36:48 +08002633 bs = blk_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002634 if (!bs) {
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002635 error_setg(errp, "Device has no medium");
Max Reitz5433c242015-10-19 17:53:29 +02002636 goto out;
2637 }
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002638
Alberto Garcia1588ab52016-02-18 12:27:00 +02002639 throttle_config_init(&cfg);
Eric Blake4dc93972016-07-13 21:50:21 -06002640 cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps;
2641 cfg.buckets[THROTTLE_BPS_READ].avg = arg->bps_rd;
2642 cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002643
Eric Blake4dc93972016-07-13 21:50:21 -06002644 cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops;
2645 cfg.buckets[THROTTLE_OPS_READ].avg = arg->iops_rd;
2646 cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr;
Benoît Canetcc0681c2013-09-02 14:14:39 +02002647
Eric Blake4dc93972016-07-13 21:50:21 -06002648 if (arg->has_bps_max) {
2649 cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002650 }
Eric Blake4dc93972016-07-13 21:50:21 -06002651 if (arg->has_bps_rd_max) {
2652 cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002653 }
Eric Blake4dc93972016-07-13 21:50:21 -06002654 if (arg->has_bps_wr_max) {
2655 cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002656 }
Eric Blake4dc93972016-07-13 21:50:21 -06002657 if (arg->has_iops_max) {
2658 cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002659 }
Eric Blake4dc93972016-07-13 21:50:21 -06002660 if (arg->has_iops_rd_max) {
2661 cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002662 }
Eric Blake4dc93972016-07-13 21:50:21 -06002663 if (arg->has_iops_wr_max) {
2664 cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002665 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002666
Eric Blake4dc93972016-07-13 21:50:21 -06002667 if (arg->has_bps_max_length) {
2668 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002669 }
Eric Blake4dc93972016-07-13 21:50:21 -06002670 if (arg->has_bps_rd_max_length) {
2671 cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002672 }
Eric Blake4dc93972016-07-13 21:50:21 -06002673 if (arg->has_bps_wr_max_length) {
2674 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002675 }
Eric Blake4dc93972016-07-13 21:50:21 -06002676 if (arg->has_iops_max_length) {
2677 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002678 }
Eric Blake4dc93972016-07-13 21:50:21 -06002679 if (arg->has_iops_rd_max_length) {
2680 cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002681 }
Eric Blake4dc93972016-07-13 21:50:21 -06002682 if (arg->has_iops_wr_max_length) {
2683 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002684 }
2685
Eric Blake4dc93972016-07-13 21:50:21 -06002686 if (arg->has_iops_size) {
2687 cfg.op_size = arg->iops_size;
Benoît Canet2024c1d2013-09-02 14:14:41 +02002688 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002689
Alberto Garciad5851082016-02-18 12:26:59 +02002690 if (!throttle_is_valid(&cfg, errp)) {
Max Reitz5433c242015-10-19 17:53:29 +02002691 goto out;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002692 }
2693
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002694 if (throttle_enabled(&cfg)) {
2695 /* Enable I/O limits if they're not enabled yet, otherwise
2696 * just update the throttling group. */
Kevin Wolf97148072016-03-21 13:53:52 +01002697 if (!blk_get_public(blk)->throttle_state) {
Eric Blake4dc93972016-07-13 21:50:21 -06002698 blk_io_limits_enable(blk,
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002699 arg->has_group ? arg->group :
2700 arg->has_device ? arg->device :
2701 arg->id);
Eric Blake4dc93972016-07-13 21:50:21 -06002702 } else if (arg->has_group) {
2703 blk_io_limits_update_group(blk, arg->group);
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002704 }
2705 /* Set the new throttling configuration */
Kevin Wolf97148072016-03-21 13:53:52 +01002706 blk_set_io_limits(blk, &cfg);
2707 } else if (blk_get_public(blk)->throttle_state) {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002708 /* If all throttling settings are set to 0, disable I/O limits */
Kevin Wolf97148072016-03-21 13:53:52 +01002709 blk_io_limits_disable(blk);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002710 }
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002711
Max Reitz5433c242015-10-19 17:53:29 +02002712out:
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002713 aio_context_release(aio_context);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002714}
2715
John Snow341ebc22015-04-17 19:49:52 -04002716void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2717 bool has_granularity, uint32_t granularity,
2718 Error **errp)
2719{
2720 AioContext *aio_context;
2721 BlockDriverState *bs;
2722
2723 if (!name || name[0] == '\0') {
2724 error_setg(errp, "Bitmap name cannot be empty");
2725 return;
2726 }
2727
2728 bs = bdrv_lookup_bs(node, node, errp);
2729 if (!bs) {
2730 return;
2731 }
2732
2733 aio_context = bdrv_get_aio_context(bs);
2734 aio_context_acquire(aio_context);
2735
2736 if (has_granularity) {
2737 if (granularity < 512 || !is_power_of_2(granularity)) {
2738 error_setg(errp, "Granularity must be power of 2 "
2739 "and at least 512");
2740 goto out;
2741 }
2742 } else {
2743 /* Default to cluster size, if available: */
2744 granularity = bdrv_get_default_bitmap_granularity(bs);
2745 }
2746
2747 bdrv_create_dirty_bitmap(bs, granularity, name, errp);
2748
2749 out:
2750 aio_context_release(aio_context);
2751}
2752
2753void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2754 Error **errp)
2755{
2756 AioContext *aio_context;
2757 BlockDriverState *bs;
2758 BdrvDirtyBitmap *bitmap;
2759
2760 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2761 if (!bitmap || !bs) {
2762 return;
2763 }
2764
John Snow9bd2b082015-04-17 19:49:57 -04002765 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2766 error_setg(errp,
2767 "Bitmap '%s' is currently frozen and cannot be removed",
2768 name);
2769 goto out;
2770 }
John Snow20dca812015-04-17 19:50:02 -04002771 bdrv_dirty_bitmap_make_anon(bitmap);
John Snow341ebc22015-04-17 19:49:52 -04002772 bdrv_release_dirty_bitmap(bs, bitmap);
2773
John Snow9bd2b082015-04-17 19:49:57 -04002774 out:
John Snow341ebc22015-04-17 19:49:52 -04002775 aio_context_release(aio_context);
2776}
2777
John Snowe74e6b72015-04-17 19:49:59 -04002778/**
2779 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2780 * immediately after a full backup operation.
2781 */
2782void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2783 Error **errp)
2784{
2785 AioContext *aio_context;
2786 BdrvDirtyBitmap *bitmap;
2787 BlockDriverState *bs;
2788
2789 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2790 if (!bitmap || !bs) {
2791 return;
2792 }
2793
2794 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2795 error_setg(errp,
2796 "Bitmap '%s' is currently frozen and cannot be modified",
2797 name);
2798 goto out;
2799 } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
2800 error_setg(errp,
2801 "Bitmap '%s' is currently disabled and cannot be cleared",
2802 name);
2803 goto out;
2804 }
2805
Fam Zhengdf9a6812015-11-09 18:16:54 +08002806 bdrv_clear_dirty_bitmap(bitmap, NULL);
John Snowe74e6b72015-04-17 19:49:59 -04002807
2808 out:
2809 aio_context_release(aio_context);
2810}
2811
Markus Armbruster072ebe62015-03-05 17:00:56 +01002812void hmp_drive_del(Monitor *mon, const QDict *qdict)
Ryan Harper9063f812010-11-12 11:07:13 -06002813{
2814 const char *id = qdict_get_str(qdict, "id");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002815 BlockBackend *blk;
Ryan Harper9063f812010-11-12 11:07:13 -06002816 BlockDriverState *bs;
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002817 AioContext *aio_context;
Fam Zheng3718d8a2014-05-23 21:29:43 +08002818 Error *local_err = NULL;
Ryan Harper9063f812010-11-12 11:07:13 -06002819
Kevin Wolf2073d412016-02-23 17:50:37 +01002820 bs = bdrv_find_node(id);
2821 if (bs) {
Kevin Wolf9ec88732016-09-21 14:56:11 +02002822 qmp_x_blockdev_del(id, &local_err);
Kevin Wolf2073d412016-02-23 17:50:37 +01002823 if (local_err) {
2824 error_report_err(local_err);
2825 }
2826 return;
2827 }
2828
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002829 blk = blk_by_name(id);
2830 if (!blk) {
Markus Armbrusterb1422f22014-05-16 11:00:09 +02002831 error_report("Device '%s' not found", id);
Markus Armbruster072ebe62015-03-05 17:00:56 +01002832 return;
Ryan Harper9063f812010-11-12 11:07:13 -06002833 }
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002834
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02002835 if (!blk_legacy_dinfo(blk)) {
Markus Armbruster48f364d2014-09-11 16:45:39 +02002836 error_report("Deleting device added with blockdev-add"
2837 " is not supported");
Markus Armbruster072ebe62015-03-05 17:00:56 +01002838 return;
Markus Armbruster48f364d2014-09-11 16:45:39 +02002839 }
2840
Max Reitz5433c242015-10-19 17:53:29 +02002841 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002842 aio_context_acquire(aio_context);
2843
Max Reitz5433c242015-10-19 17:53:29 +02002844 bs = blk_bs(blk);
2845 if (bs) {
2846 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
2847 error_report_err(local_err);
2848 aio_context_release(aio_context);
2849 return;
2850 }
Ryan Harper9063f812010-11-12 11:07:13 -06002851
Max Reitz938abd42016-01-29 16:36:09 +01002852 blk_remove_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002853 }
Ryan Harper9063f812010-11-12 11:07:13 -06002854
Max Reitz7c735872016-03-16 19:54:39 +01002855 /* Make the BlockBackend and the attached BlockDriverState anonymous */
Max Reitzefaa7c42016-03-16 19:54:38 +01002856 monitor_remove_blk(blk);
2857
Max Reitz7c735872016-03-16 19:54:39 +01002858 /* If this BlockBackend has a device attached to it, its refcount will be
2859 * decremented when the device is removed; otherwise we have to do so here.
Ryan Harperd22b2f42011-03-29 20:51:47 -05002860 */
Markus Armbrustera7f53e22014-10-07 13:59:25 +02002861 if (blk_get_attached_dev(blk)) {
Stefan Hajnoczi293c51a2013-06-05 10:33:14 +02002862 /* Further I/O must not pause the guest */
Max Reitz373340b2015-10-19 17:53:22 +02002863 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
2864 BLOCKDEV_ON_ERROR_REPORT);
Ryan Harperd22b2f42011-03-29 20:51:47 -05002865 } else {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +02002866 blk_unref(blk);
Ryan Harper9063f812010-11-12 11:07:13 -06002867 }
2868
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002869 aio_context_release(aio_context);
Ryan Harper9063f812010-11-12 11:07:13 -06002870}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002871
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002872void qmp_block_resize(bool has_device, const char *device,
2873 bool has_node_name, const char *node_name,
2874 int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002875{
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002876 Error *local_err = NULL;
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01002877 BlockBackend *blk = NULL;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002878 BlockDriverState *bs;
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002879 AioContext *aio_context;
Kevin Wolf87329012013-05-02 15:32:55 +02002880 int ret;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002881
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002882 bs = bdrv_lookup_bs(has_device ? device : NULL,
2883 has_node_name ? node_name : NULL,
2884 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002885 if (local_err) {
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002886 error_propagate(errp, local_err);
2887 return;
2888 }
2889
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002890 aio_context = bdrv_get_aio_context(bs);
2891 aio_context_acquire(aio_context);
2892
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002893 if (!bdrv_is_first_non_filter(bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002894 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002895 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002896 }
2897
2898 if (size < 0) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002899 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002900 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002901 }
2902
Jeff Cody9c75e162014-06-25 16:55:30 -04002903 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002904 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002905 goto out;
Jeff Cody9c75e162014-06-25 16:55:30 -04002906 }
2907
Kevin Wolf6d0eb642017-01-20 17:07:26 +01002908 blk = blk_new(BLK_PERM_RESIZE, BLK_PERM_ALL);
Kevin Wolfd7086422017-01-13 19:02:32 +01002909 ret = blk_insert_bs(blk, bs, errp);
2910 if (ret < 0) {
2911 goto out;
2912 }
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01002913
Peter Lieven92b7a082013-03-11 11:04:24 +01002914 /* complete all in-flight operations before resizing the device */
2915 bdrv_drain_all();
2916
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01002917 ret = blk_truncate(blk, size);
Kevin Wolf87329012013-05-02 15:32:55 +02002918 switch (ret) {
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002919 case 0:
2920 break;
2921 case -ENOMEDIUM:
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002922 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002923 break;
2924 case -ENOTSUP:
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002925 error_setg(errp, QERR_UNSUPPORTED);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002926 break;
2927 case -EACCES:
Alberto Garcia81e5f782015-04-08 12:29:19 +03002928 error_setg(errp, "Device '%s' is read only", device);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002929 break;
2930 case -EBUSY:
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002931 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002932 break;
2933 default:
Kevin Wolf87329012013-05-02 15:32:55 +02002934 error_setg_errno(errp, -ret, "Could not resize");
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002935 break;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002936 }
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002937
2938out:
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01002939 blk_unref(blk);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002940 aio_context_release(aio_context);
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002941}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002942
Alberto Garcia23233222016-07-05 17:28:59 +03002943void qmp_block_stream(bool has_job_id, const char *job_id, const char *device,
Jeff Cody13d8cc52014-06-25 15:40:11 -04002944 bool has_base, const char *base,
Alberto Garcia312fe092016-10-28 10:08:19 +03002945 bool has_base_node, const char *base_node,
Jeff Cody13d8cc52014-06-25 15:40:11 -04002946 bool has_backing_file, const char *backing_file,
2947 bool has_speed, int64_t speed,
Paolo Bonzini1d809092012-09-28 17:22:59 +02002948 bool has_on_error, BlockdevOnError on_error,
2949 Error **errp)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002950{
Alberto Garcia554b6142016-10-28 10:08:11 +03002951 BlockDriverState *bs, *iter;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00002952 BlockDriverState *base_bs = NULL;
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01002953 AioContext *aio_context;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01002954 Error *local_err = NULL;
Jeff Cody13d8cc52014-06-25 15:40:11 -04002955 const char *base_name = NULL;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002956
Paolo Bonzini1d809092012-09-28 17:22:59 +02002957 if (!has_on_error) {
2958 on_error = BLOCKDEV_ON_ERROR_REPORT;
2959 }
2960
Alberto Garcia554b6142016-10-28 10:08:11 +03002961 bs = bdrv_lookup_bs(device, device, errp);
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02002962 if (!bs) {
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002963 return;
2964 }
2965
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02002966 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01002967 aio_context_acquire(aio_context);
2968
Alberto Garcia312fe092016-10-28 10:08:19 +03002969 if (has_base && has_base_node) {
2970 error_setg(errp, "'base' and 'base-node' cannot be specified "
2971 "at the same time");
2972 goto out;
2973 }
2974
Jeff Cody13d8cc52014-06-25 15:40:11 -04002975 if (has_base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00002976 base_bs = bdrv_find_backing_image(bs, base);
2977 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002978 error_setg(errp, QERR_BASE_NOT_FOUND, base);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01002979 goto out;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00002980 }
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01002981 assert(bdrv_get_aio_context(base_bs) == aio_context);
Jeff Cody13d8cc52014-06-25 15:40:11 -04002982 base_name = base;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002983 }
2984
Alberto Garcia312fe092016-10-28 10:08:19 +03002985 if (has_base_node) {
2986 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
2987 if (!base_bs) {
2988 goto out;
2989 }
2990 if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) {
2991 error_setg(errp, "Node '%s' is not a backing image of '%s'",
2992 base_node, device);
2993 goto out;
2994 }
2995 assert(bdrv_get_aio_context(base_bs) == aio_context);
2996 base_name = base_bs->filename;
2997 }
2998
Alberto Garcia554b6142016-10-28 10:08:11 +03002999 /* Check for op blockers in the whole chain between bs and base */
3000 for (iter = bs; iter && iter != base_bs; iter = backing_bs(iter)) {
3001 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
3002 goto out;
3003 }
3004 }
3005
Jeff Cody13d8cc52014-06-25 15:40:11 -04003006 /* if we are streaming the entire chain, the result will have no backing
3007 * file, and specifying one is therefore an error */
3008 if (base_bs == NULL && has_backing_file) {
3009 error_setg(errp, "backing file specified, but streaming the "
3010 "entire chain");
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003011 goto out;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003012 }
3013
3014 /* backing_file string overrides base bs filename */
3015 base_name = has_backing_file ? backing_file : base_name;
3016
Alberto Garcia23233222016-07-05 17:28:59 +03003017 stream_start(has_job_id ? job_id : NULL, bs, base_bs, base_name,
John Snow8254b6d2016-10-27 12:06:58 -04003018 has_speed ? speed : 0, on_error, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003019 if (local_err) {
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003020 error_propagate(errp, local_err);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003021 goto out;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003022 }
3023
3024 trace_qmp_block_stream(bs, bs->job);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003025
3026out:
3027 aio_context_release(aio_context);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003028}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003029
Alberto Garciafd62c602016-07-05 17:29:00 +03003030void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003031 bool has_base, const char *base,
3032 bool has_top, const char *top,
Jeff Cody54e26902014-06-25 15:40:10 -04003033 bool has_backing_file, const char *backing_file,
Jeff Codyed61fc12012-09-27 13:29:16 -04003034 bool has_speed, int64_t speed,
3035 Error **errp)
3036{
3037 BlockDriverState *bs;
Alberto Garcia058223a2016-10-28 10:08:07 +03003038 BlockDriverState *iter;
Jeff Codyed61fc12012-09-27 13:29:16 -04003039 BlockDriverState *base_bs, *top_bs;
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003040 AioContext *aio_context;
Jeff Codyed61fc12012-09-27 13:29:16 -04003041 Error *local_err = NULL;
3042 /* This will be part of the QMP command, if/when the
3043 * BlockdevOnError change for blkmirror makes it in
3044 */
Paolo Bonzini92aa5c62012-09-28 17:22:55 +02003045 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
Jeff Codyed61fc12012-09-27 13:29:16 -04003046
Max Reitz54504662014-04-10 19:36:25 +02003047 if (!has_speed) {
3048 speed = 0;
3049 }
3050
Jeff Cody7676e2c2014-06-30 15:14:15 +02003051 /* Important Note:
3052 * libvirt relies on the DeviceNotFound error class in order to probe for
3053 * live commit feature versions; for this to work, we must make sure to
3054 * perform the device lookup before any generic errors that may occur in a
3055 * scenario in which all optional arguments are omitted. */
Kevin Wolf1d13b162016-06-23 14:20:24 +02003056 bs = qmp_get_root_bs(device, &local_err);
3057 if (!bs) {
3058 bs = bdrv_lookup_bs(device, device, NULL);
3059 if (!bs) {
3060 error_free(local_err);
3061 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3062 "Device '%s' not found", device);
3063 } else {
3064 error_propagate(errp, local_err);
3065 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003066 return;
3067 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003068
Kevin Wolf1d13b162016-06-23 14:20:24 +02003069 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003070 aio_context_acquire(aio_context);
3071
Fam Zhengbb000212014-09-11 13:14:00 +08003072 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003073 goto out;
Fam Zheng628ff682014-05-23 21:29:44 +08003074 }
3075
Jeff Codyed61fc12012-09-27 13:29:16 -04003076 /* default top_bs is the active layer */
3077 top_bs = bs;
3078
Jeff Cody7676e2c2014-06-30 15:14:15 +02003079 if (has_top && top) {
Jeff Codyed61fc12012-09-27 13:29:16 -04003080 if (strcmp(bs->filename, top) != 0) {
3081 top_bs = bdrv_find_backing_image(bs, top);
3082 }
3083 }
3084
3085 if (top_bs == NULL) {
3086 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003087 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003088 }
3089
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003090 assert(bdrv_get_aio_context(top_bs) == aio_context);
3091
Jeff Codyd5208c42012-10-16 15:49:10 -04003092 if (has_base && base) {
3093 base_bs = bdrv_find_backing_image(top_bs, base);
3094 } else {
3095 base_bs = bdrv_find_base(top_bs);
3096 }
3097
3098 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003099 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003100 goto out;
Jeff Codyd5208c42012-10-16 15:49:10 -04003101 }
3102
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003103 assert(bdrv_get_aio_context(base_bs) == aio_context);
3104
Alberto Garcia058223a2016-10-28 10:08:07 +03003105 for (iter = top_bs; iter != backing_bs(base_bs); iter = backing_bs(iter)) {
3106 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3107 goto out;
3108 }
Fam Zhengbb000212014-09-11 13:14:00 +08003109 }
3110
Jeff Cody7676e2c2014-06-30 15:14:15 +02003111 /* Do not allow attempts to commit an image into itself */
3112 if (top_bs == base_bs) {
3113 error_setg(errp, "cannot commit an image into itself");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003114 goto out;
Jeff Cody7676e2c2014-06-30 15:14:15 +02003115 }
3116
Fam Zheng20a63d22013-12-16 14:45:31 +08003117 if (top_bs == bs) {
Jeff Cody54e26902014-06-25 15:40:10 -04003118 if (has_backing_file) {
3119 error_setg(errp, "'backing-file' specified,"
3120 " but 'top' is the active layer");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003121 goto out;
Jeff Cody54e26902014-06-25 15:40:10 -04003122 }
John Snow47970df2016-10-27 12:06:57 -04003123 commit_active_start(has_job_id ? job_id : NULL, bs, base_bs,
John Snow8254b6d2016-10-27 12:06:58 -04003124 BLOCK_JOB_DEFAULT, speed, on_error, NULL, NULL,
3125 &local_err, false);
Fam Zheng20a63d22013-12-16 14:45:31 +08003126 } else {
Alberto Garcia058223a2016-10-28 10:08:07 +03003127 BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
3128 if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3129 goto out;
3130 }
Alberto Garciafd62c602016-07-05 17:29:00 +03003131 commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, speed,
John Snow8254b6d2016-10-27 12:06:58 -04003132 on_error, has_backing_file ? backing_file : NULL,
3133 &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003134 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003135 if (local_err != NULL) {
3136 error_propagate(errp, local_err);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003137 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003138 }
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003139
3140out:
3141 aio_context_release(aio_context);
Jeff Codyed61fc12012-09-27 13:29:16 -04003142}
3143
John Snow111049a2016-11-08 01:50:38 -05003144static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
3145 Error **errp)
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003146{
3147 BlockDriverState *bs;
3148 BlockDriverState *target_bs;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003149 BlockDriverState *source = NULL;
John Snow111049a2016-11-08 01:50:38 -05003150 BlockJob *job = NULL;
John Snowd58d8452015-04-17 19:49:58 -04003151 BdrvDirtyBitmap *bmap = NULL;
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003152 AioContext *aio_context;
Max Reitze6641712015-08-26 19:47:48 +02003153 QDict *options = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003154 Error *local_err = NULL;
3155 int flags;
3156 int64_t size;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003157
Pavel Butsykin81206a82016-07-22 11:17:50 +03003158 if (!backup->has_speed) {
3159 backup->speed = 0;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003160 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003161 if (!backup->has_on_source_error) {
3162 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003163 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003164 if (!backup->has_on_target_error) {
3165 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003166 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003167 if (!backup->has_mode) {
3168 backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3169 }
3170 if (!backup->has_job_id) {
3171 backup->job_id = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003172 }
Pavel Butsykin13b94142016-07-22 11:17:52 +03003173 if (!backup->has_compress) {
3174 backup->compress = false;
3175 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003176
Pavel Butsykin81206a82016-07-22 11:17:50 +03003177 bs = qmp_get_root_bs(backup->device, errp);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003178 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003179 return NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003180 }
3181
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003182 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003183 aio_context_acquire(aio_context);
3184
Pavel Butsykin81206a82016-07-22 11:17:50 +03003185 if (!backup->has_format) {
3186 backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ?
3187 NULL : (char*) bs->drv->format_name;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003188 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003189
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003190 /* Early check to avoid creating target */
Fam Zheng3718d8a2014-05-23 21:29:43 +08003191 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003192 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003193 }
3194
Kevin Wolf61de4c62016-03-18 17:46:45 +01003195 flags = bs->open_flags | BDRV_O_RDWR;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003196
Ian Mainfc5d3f82013-07-26 11:39:04 -07003197 /* See if we have a backing HD we can use to create our new image
3198 * on top of. */
Pavel Butsykin81206a82016-07-22 11:17:50 +03003199 if (backup->sync == MIRROR_SYNC_MODE_TOP) {
Kevin Wolf760e0062015-06-17 14:55:21 +02003200 source = backing_bs(bs);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003201 if (!source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003202 backup->sync = MIRROR_SYNC_MODE_FULL;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003203 }
3204 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003205 if (backup->sync == MIRROR_SYNC_MODE_NONE) {
Ian Mainfc5d3f82013-07-26 11:39:04 -07003206 source = bs;
3207 }
3208
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003209 size = bdrv_getlength(bs);
3210 if (size < 0) {
3211 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003212 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003213 }
3214
Pavel Butsykin81206a82016-07-22 11:17:50 +03003215 if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
3216 assert(backup->format);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003217 if (source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003218 bdrv_img_create(backup->target, backup->format, source->filename,
Ian Mainfc5d3f82013-07-26 11:39:04 -07003219 source->drv->format_name, NULL,
3220 size, flags, &local_err, false);
3221 } else {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003222 bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL,
Ian Mainfc5d3f82013-07-26 11:39:04 -07003223 size, flags, &local_err, false);
3224 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003225 }
3226
Markus Armbruster84d18f02014-01-30 15:07:28 +01003227 if (local_err) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003228 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003229 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003230 }
3231
Pavel Butsykin81206a82016-07-22 11:17:50 +03003232 if (backup->format) {
Max Reitze6641712015-08-26 19:47:48 +02003233 options = qdict_new();
Pavel Butsykin81206a82016-07-22 11:17:50 +03003234 qdict_put(options, "driver", qstring_from_str(backup->format));
Max Reitze6641712015-08-26 19:47:48 +02003235 }
3236
Pavel Butsykin81206a82016-07-22 11:17:50 +03003237 target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003238 if (!target_bs) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003239 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003240 }
3241
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003242 bdrv_set_aio_context(target_bs, aio_context);
3243
Pavel Butsykin81206a82016-07-22 11:17:50 +03003244 if (backup->has_bitmap) {
3245 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
John Snowd58d8452015-04-17 19:49:58 -04003246 if (!bmap) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003247 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
Max Reitz0702d3d2015-11-09 23:39:10 +01003248 bdrv_unref(target_bs);
John Snowd58d8452015-04-17 19:49:58 -04003249 goto out;
3250 }
3251 }
3252
John Snow111049a2016-11-08 01:50:38 -05003253 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
3254 backup->sync, bmap, backup->compress,
3255 backup->on_source_error, backup->on_target_error,
3256 BLOCK_JOB_DEFAULT, NULL, NULL, txn, &local_err);
Kevin Wolf5c438bc2016-04-14 13:09:53 +02003257 bdrv_unref(target_bs);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003258 if (local_err != NULL) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003259 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003260 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003261 }
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003262
3263out:
3264 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003265 return job;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003266}
3267
Pavel Butsykin81206a82016-07-22 11:17:50 +03003268void qmp_drive_backup(DriveBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003269{
John Snow111049a2016-11-08 01:50:38 -05003270
3271 BlockJob *job;
3272 job = do_drive_backup(arg, NULL, errp);
3273 if (job) {
3274 block_job_start(job);
3275 }
John Snow78f51fd2015-11-05 18:13:17 -05003276}
3277
Benoît Canetc13163f2014-01-23 21:31:34 +01003278BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3279{
Alberto Garciad5a8ee62015-04-17 14:52:43 +03003280 return bdrv_named_nodes_list(errp);
Benoît Canetc13163f2014-01-23 21:31:34 +01003281}
3282
John Snow111049a2016-11-08 01:50:38 -05003283BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
3284 Error **errp)
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003285{
3286 BlockDriverState *bs;
3287 BlockDriverState *target_bs;
3288 Error *local_err = NULL;
3289 AioContext *aio_context;
John Snow111049a2016-11-08 01:50:38 -05003290 BlockJob *job = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003291
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003292 if (!backup->has_speed) {
3293 backup->speed = 0;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003294 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003295 if (!backup->has_on_source_error) {
3296 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003297 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003298 if (!backup->has_on_target_error) {
3299 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3300 }
3301 if (!backup->has_job_id) {
3302 backup->job_id = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003303 }
Pavel Butsykin3b7b1232016-07-22 11:17:53 +03003304 if (!backup->has_compress) {
3305 backup->compress = false;
3306 }
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003307
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003308 bs = qmp_get_root_bs(backup->device, errp);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003309 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003310 return NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003311 }
3312
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003313 aio_context = bdrv_get_aio_context(bs);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003314 aio_context_acquire(aio_context);
3315
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003316 target_bs = bdrv_lookup_bs(backup->target, backup->target, errp);
Fam Zheng0d978912016-05-23 10:19:35 +08003317 if (!target_bs) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003318 goto out;
3319 }
Max Reitz5433c242015-10-19 17:53:29 +02003320
Fam Zhengefd75562016-05-23 10:19:36 +08003321 if (bdrv_get_aio_context(target_bs) != aio_context) {
3322 if (!bdrv_has_blk(target_bs)) {
3323 /* The target BDS is not attached, we can safely move it to another
3324 * AioContext. */
3325 bdrv_set_aio_context(target_bs, aio_context);
3326 } else {
3327 error_setg(errp, "Target is attached to a different thread from "
3328 "source.");
3329 goto out;
3330 }
3331 }
John Snow111049a2016-11-08 01:50:38 -05003332 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
3333 backup->sync, NULL, backup->compress,
3334 backup->on_source_error, backup->on_target_error,
3335 BLOCK_JOB_DEFAULT, NULL, NULL, txn, &local_err);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003336 if (local_err != NULL) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003337 error_propagate(errp, local_err);
3338 }
3339out:
3340 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003341 return job;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003342}
3343
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003344void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003345{
John Snow111049a2016-11-08 01:50:38 -05003346 BlockJob *job;
3347 job = do_blockdev_backup(arg, NULL, errp);
3348 if (job) {
3349 block_job_start(job);
3350 }
John Snow78f51fd2015-11-05 18:13:17 -05003351}
3352
Fam Zheng4193cdd2015-12-24 12:45:03 +08003353/* Parameter check and block job starting for drive mirroring.
3354 * Caller should hold @device and @target's aio context (must be the same).
3355 **/
Alberto Garcia71aa9862016-07-05 17:28:57 +03003356static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003357 BlockDriverState *target,
3358 bool has_replaces, const char *replaces,
3359 enum MirrorSyncMode sync,
Max Reitz274fcce2016-06-10 20:57:47 +02003360 BlockMirrorBackingMode backing_mode,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003361 bool has_speed, int64_t speed,
3362 bool has_granularity, uint32_t granularity,
3363 bool has_buf_size, int64_t buf_size,
3364 bool has_on_source_error,
3365 BlockdevOnError on_source_error,
3366 bool has_on_target_error,
3367 BlockdevOnError on_target_error,
3368 bool has_unmap, bool unmap,
3369 Error **errp)
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003370{
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003371
3372 if (!has_speed) {
3373 speed = 0;
3374 }
Paolo Bonzinib952b552012-10-18 16:49:28 +02003375 if (!has_on_source_error) {
3376 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3377 }
3378 if (!has_on_target_error) {
3379 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3380 }
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003381 if (!has_granularity) {
3382 granularity = 0;
3383 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003384 if (!has_buf_size) {
Wen Congyang48ac0a42015-05-15 15:51:36 +08003385 buf_size = 0;
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003386 }
Fam Zheng0fc9f8e2015-06-08 13:56:08 +08003387 if (!has_unmap) {
3388 unmap = true;
3389 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003390
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003391 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003392 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3393 "a value in range [512B, 64MB]");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003394 return;
3395 }
3396 if (granularity & (granularity - 1)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003397 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3398 "power of 2");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003399 return;
3400 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003401
Fam Zheng4193cdd2015-12-24 12:45:03 +08003402 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3403 return;
3404 }
Fam Zhenge40e5022015-12-24 12:45:04 +08003405 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3406 return;
3407 }
Fam Zheng4193cdd2015-12-24 12:45:03 +08003408
3409 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3410 sync = MIRROR_SYNC_MODE_FULL;
3411 }
3412
3413 /* pass the node name to replace to mirror start since it's loose coupling
3414 * and will allow to check whether the node still exist at mirror completion
3415 */
Alberto Garcia71aa9862016-07-05 17:28:57 +03003416 mirror_start(job_id, bs, target,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003417 has_replaces ? replaces : NULL,
Max Reitz274fcce2016-06-10 20:57:47 +02003418 speed, granularity, buf_size, sync, backing_mode,
John Snow8254b6d2016-10-27 12:06:58 -04003419 on_source_error, on_target_error, unmap, errp);
Fam Zheng4193cdd2015-12-24 12:45:03 +08003420}
3421
Eric Blakefaecd402016-07-14 16:37:58 -06003422void qmp_drive_mirror(DriveMirror *arg, Error **errp)
Fam Zheng4193cdd2015-12-24 12:45:03 +08003423{
3424 BlockDriverState *bs;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003425 BlockDriverState *source, *target_bs;
3426 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003427 BlockMirrorBackingMode backing_mode;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003428 Error *local_err = NULL;
3429 QDict *options = NULL;
3430 int flags;
3431 int64_t size;
Eric Blakefaecd402016-07-14 16:37:58 -06003432 const char *format = arg->format;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003433
Kevin Wolf0524e932016-06-23 14:20:24 +02003434 bs = qmp_get_root_bs(arg->device, errp);
3435 if (!bs) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003436 return;
3437 }
3438
Kevin Wolf0524e932016-06-23 14:20:24 +02003439 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003440 aio_context_acquire(aio_context);
3441
Eric Blakefaecd402016-07-14 16:37:58 -06003442 if (!arg->has_mode) {
3443 arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003444 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003445
Eric Blakefaecd402016-07-14 16:37:58 -06003446 if (!arg->has_format) {
3447 format = (arg->mode == NEW_IMAGE_MODE_EXISTING
3448 ? NULL : bs->drv->format_name);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003449 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003450
Kevin Wolf61de4c62016-03-18 17:46:45 +01003451 flags = bs->open_flags | BDRV_O_RDWR;
Kevin Wolf760e0062015-06-17 14:55:21 +02003452 source = backing_bs(bs);
Eric Blakefaecd402016-07-14 16:37:58 -06003453 if (!source && arg->sync == MIRROR_SYNC_MODE_TOP) {
3454 arg->sync = MIRROR_SYNC_MODE_FULL;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003455 }
Eric Blakefaecd402016-07-14 16:37:58 -06003456 if (arg->sync == MIRROR_SYNC_MODE_NONE) {
Max Reitz117e0c82013-11-25 20:28:55 +01003457 source = bs;
3458 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003459
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003460 size = bdrv_getlength(bs);
3461 if (size < 0) {
3462 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003463 goto out;
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003464 }
3465
Eric Blakefaecd402016-07-14 16:37:58 -06003466 if (arg->has_replaces) {
Benoît Canet09158f02014-06-27 18:25:25 +02003467 BlockDriverState *to_replace_bs;
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003468 AioContext *replace_aio_context;
3469 int64_t replace_size;
Benoît Canet09158f02014-06-27 18:25:25 +02003470
Eric Blakefaecd402016-07-14 16:37:58 -06003471 if (!arg->has_node_name) {
Benoît Canet09158f02014-06-27 18:25:25 +02003472 error_setg(errp, "a node-name must be provided when replacing a"
3473 " named node of the graph");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003474 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003475 }
3476
Eric Blakefaecd402016-07-14 16:37:58 -06003477 to_replace_bs = check_to_replace_node(bs, arg->replaces, &local_err);
Benoît Canet09158f02014-06-27 18:25:25 +02003478
3479 if (!to_replace_bs) {
3480 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003481 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003482 }
3483
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003484 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3485 aio_context_acquire(replace_aio_context);
3486 replace_size = bdrv_getlength(to_replace_bs);
3487 aio_context_release(replace_aio_context);
3488
3489 if (size != replace_size) {
Benoît Canet09158f02014-06-27 18:25:25 +02003490 error_setg(errp, "cannot replace image with a mirror image of "
3491 "different size");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003492 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003493 }
3494 }
3495
Eric Blakefaecd402016-07-14 16:37:58 -06003496 if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
Max Reitz274fcce2016-06-10 20:57:47 +02003497 backing_mode = MIRROR_SOURCE_BACKING_CHAIN;
3498 } else {
3499 backing_mode = MIRROR_OPEN_BACKING_CHAIN;
3500 }
3501
Eric Blakefaecd402016-07-14 16:37:58 -06003502 if ((arg->sync == MIRROR_SYNC_MODE_FULL || !source)
3503 && arg->mode != NEW_IMAGE_MODE_EXISTING)
Max Reitz14526862013-11-06 19:50:44 +01003504 {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003505 /* create new image w/o backing file */
Max Reitze6641712015-08-26 19:47:48 +02003506 assert(format);
Eric Blakefaecd402016-07-14 16:37:58 -06003507 bdrv_img_create(arg->target, format,
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01003508 NULL, NULL, NULL, size, flags, &local_err, false);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003509 } else {
Eric Blakefaecd402016-07-14 16:37:58 -06003510 switch (arg->mode) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003511 case NEW_IMAGE_MODE_EXISTING:
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003512 break;
3513 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3514 /* create new image with backing file */
Eric Blakefaecd402016-07-14 16:37:58 -06003515 bdrv_img_create(arg->target, format,
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003516 source->filename,
3517 source->drv->format_name,
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01003518 NULL, size, flags, &local_err, false);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003519 break;
3520 default:
3521 abort();
3522 }
3523 }
3524
Markus Armbruster84d18f02014-01-30 15:07:28 +01003525 if (local_err) {
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003526 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003527 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003528 }
3529
Max Reitze6641712015-08-26 19:47:48 +02003530 options = qdict_new();
Eric Blakefaecd402016-07-14 16:37:58 -06003531 if (arg->has_node_name) {
3532 qdict_put(options, "node-name", qstring_from_str(arg->node_name));
Benoît Canet4c828dc2014-06-16 12:00:55 +02003533 }
Max Reitze6641712015-08-26 19:47:48 +02003534 if (format) {
3535 qdict_put(options, "driver", qstring_from_str(format));
3536 }
Benoît Canet4c828dc2014-06-16 12:00:55 +02003537
Paolo Bonzinib812f672013-01-21 17:09:43 +01003538 /* Mirroring takes care of copy-on-write using the source's backing
3539 * file.
3540 */
Eric Blakefaecd402016-07-14 16:37:58 -06003541 target_bs = bdrv_open(arg->target, NULL, options,
3542 flags | BDRV_O_NO_BACKING, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003543 if (!target_bs) {
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003544 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003545 }
3546
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003547 bdrv_set_aio_context(target_bs, aio_context);
3548
Eric Blakefaecd402016-07-14 16:37:58 -06003549 blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs,
3550 arg->has_replaces, arg->replaces, arg->sync,
3551 backing_mode, arg->has_speed, arg->speed,
3552 arg->has_granularity, arg->granularity,
3553 arg->has_buf_size, arg->buf_size,
3554 arg->has_on_source_error, arg->on_source_error,
3555 arg->has_on_target_error, arg->on_target_error,
3556 arg->has_unmap, arg->unmap,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003557 &local_err);
Kevin Wolfe253f4b2016-04-12 16:17:41 +02003558 bdrv_unref(target_bs);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003559 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003560out:
3561 aio_context_release(aio_context);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003562}
3563
Alberto Garcia71aa9862016-07-05 17:28:57 +03003564void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
3565 const char *device, const char *target,
Fam Zhengdf925622015-12-24 12:45:05 +08003566 bool has_replaces, const char *replaces,
3567 MirrorSyncMode sync,
3568 bool has_speed, int64_t speed,
3569 bool has_granularity, uint32_t granularity,
3570 bool has_buf_size, int64_t buf_size,
3571 bool has_on_source_error,
3572 BlockdevOnError on_source_error,
3573 bool has_on_target_error,
3574 BlockdevOnError on_target_error,
3575 Error **errp)
3576{
3577 BlockDriverState *bs;
Fam Zhengdf925622015-12-24 12:45:05 +08003578 BlockDriverState *target_bs;
3579 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003580 BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN;
Fam Zhengdf925622015-12-24 12:45:05 +08003581 Error *local_err = NULL;
3582
Kevin Wolf07eec652016-06-23 14:20:24 +02003583 bs = qmp_get_root_bs(device, errp);
Fam Zhengdf925622015-12-24 12:45:05 +08003584 if (!bs) {
Fam Zhengdf925622015-12-24 12:45:05 +08003585 return;
3586 }
3587
3588 target_bs = bdrv_lookup_bs(target, target, errp);
3589 if (!target_bs) {
3590 return;
3591 }
3592
3593 aio_context = bdrv_get_aio_context(bs);
3594 aio_context_acquire(aio_context);
3595
Fam Zhengdf925622015-12-24 12:45:05 +08003596 bdrv_set_aio_context(target_bs, aio_context);
3597
Alberto Garcia71aa9862016-07-05 17:28:57 +03003598 blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs,
Max Reitz274fcce2016-06-10 20:57:47 +02003599 has_replaces, replaces, sync, backing_mode,
Fam Zhengdf925622015-12-24 12:45:05 +08003600 has_speed, speed,
3601 has_granularity, granularity,
3602 has_buf_size, buf_size,
3603 has_on_source_error, on_source_error,
3604 has_on_target_error, on_target_error,
3605 true, true,
3606 &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003607 error_propagate(errp, local_err);
Fam Zhengdf925622015-12-24 12:45:05 +08003608
3609 aio_context_release(aio_context);
3610}
3611
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003612/* Get a block job using its ID and acquire its AioContext */
3613static BlockJob *find_block_job(const char *id, AioContext **aio_context,
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003614 Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003615{
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003616 BlockJob *job;
3617
3618 assert(id != NULL);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003619
Max Reitz5433c242015-10-19 17:53:29 +02003620 *aio_context = NULL;
3621
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003622 job = block_job_get(id);
3623
3624 if (!job) {
3625 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
3626 "Block job '%s' not found", id);
3627 return NULL;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003628 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003629
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003630 *aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003631 aio_context_acquire(*aio_context);
3632
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003633 return job;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003634}
3635
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003636void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003637{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003638 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003639 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003640
3641 if (!job) {
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003642 return;
3643 }
3644
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003645 block_job_set_speed(job, speed, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003646 aio_context_release(aio_context);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003647}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003648
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003649void qmp_block_job_cancel(const char *device,
3650 bool has_force, bool force, Error **errp)
3651{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003652 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003653 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003654
3655 if (!job) {
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003656 return;
3657 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003658
3659 if (!has_force) {
3660 force = false;
3661 }
3662
John Snow0df4ba52016-10-27 12:06:59 -04003663 if (block_job_user_paused(job) && !force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04003664 error_setg(errp, "The block job for device '%s' is currently paused",
3665 device);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003666 goto out;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003667 }
3668
3669 trace_qmp_block_job_cancel(job);
3670 block_job_cancel(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003671out:
3672 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003673}
3674
3675void qmp_block_job_pause(const char *device, Error **errp)
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003676{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003677 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003678 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003679
John Snow0df4ba52016-10-27 12:06:59 -04003680 if (!job || block_job_user_paused(job)) {
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003681 return;
3682 }
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003683
3684 trace_qmp_block_job_pause(job);
John Snow0df4ba52016-10-27 12:06:59 -04003685 block_job_user_pause(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003686 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003687}
3688
3689void qmp_block_job_resume(const char *device, Error **errp)
3690{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003691 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003692 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003693
John Snow0df4ba52016-10-27 12:06:59 -04003694 if (!job || !block_job_user_paused(job)) {
Paolo Bonzini8acc72a2012-09-28 17:22:50 +02003695 return;
3696 }
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003697
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003698 trace_qmp_block_job_resume(job);
Stefan Hajnoczi17bd51f2016-06-16 17:56:22 +01003699 block_job_iostatus_reset(job);
John Snow0df4ba52016-10-27 12:06:59 -04003700 block_job_user_resume(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003701 aio_context_release(aio_context);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003702}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00003703
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003704void qmp_block_job_complete(const char *device, Error **errp)
3705{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003706 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003707 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003708
3709 if (!job) {
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003710 return;
3711 }
3712
3713 trace_qmp_block_job_complete(job);
3714 block_job_complete(job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003715 aio_context_release(aio_context);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003716}
3717
Jeff Codyfa40e652014-07-01 09:52:16 +02003718void qmp_change_backing_file(const char *device,
3719 const char *image_node_name,
3720 const char *backing_file,
3721 Error **errp)
3722{
3723 BlockDriverState *bs = NULL;
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003724 AioContext *aio_context;
Jeff Codyfa40e652014-07-01 09:52:16 +02003725 BlockDriverState *image_bs = NULL;
3726 Error *local_err = NULL;
3727 bool ro;
3728 int open_flags;
3729 int ret;
3730
Kevin Wolf7b5dca32016-06-23 14:20:24 +02003731 bs = qmp_get_root_bs(device, errp);
3732 if (!bs) {
Jeff Codyfa40e652014-07-01 09:52:16 +02003733 return;
3734 }
3735
Kevin Wolf7b5dca32016-06-23 14:20:24 +02003736 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003737 aio_context_acquire(aio_context);
3738
Jeff Codyfa40e652014-07-01 09:52:16 +02003739 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
3740 if (local_err) {
3741 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003742 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003743 }
3744
3745 if (!image_bs) {
3746 error_setg(errp, "image file not found");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003747 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003748 }
3749
3750 if (bdrv_find_base(image_bs) == image_bs) {
3751 error_setg(errp, "not allowing backing file change on an image "
3752 "without a backing file");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003753 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003754 }
3755
3756 /* even though we are not necessarily operating on bs, we need it to
3757 * determine if block ops are currently prohibited on the chain */
3758 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003759 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003760 }
3761
3762 /* final sanity check */
3763 if (!bdrv_chain_contains(bs, image_bs)) {
3764 error_setg(errp, "'%s' and image file are not in the same chain",
3765 device);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003766 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003767 }
3768
3769 /* if not r/w, reopen to make r/w */
3770 open_flags = image_bs->open_flags;
3771 ro = bdrv_is_read_only(image_bs);
3772
3773 if (ro) {
3774 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
3775 if (local_err) {
3776 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003777 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003778 }
3779 }
3780
3781 ret = bdrv_change_backing_file(image_bs, backing_file,
3782 image_bs->drv ? image_bs->drv->format_name : "");
3783
3784 if (ret < 0) {
3785 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
3786 backing_file);
3787 /* don't exit here, so we can try to restore open flags if
3788 * appropriate */
3789 }
3790
3791 if (ro) {
3792 bdrv_reopen(image_bs, open_flags, &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003793 error_propagate(errp, local_err);
Jeff Codyfa40e652014-07-01 09:52:16 +02003794 }
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003795
3796out:
3797 aio_context_release(aio_context);
Jeff Codyfa40e652014-07-01 09:52:16 +02003798}
3799
Kevin Wolfabb21ac2016-02-23 17:33:24 +01003800void hmp_drive_add_node(Monitor *mon, const char *optstr)
3801{
3802 QemuOpts *opts;
3803 QDict *qdict;
3804 Error *local_err = NULL;
3805
3806 opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
3807 if (!opts) {
3808 return;
3809 }
3810
3811 qdict = qemu_opts_to_qdict(opts, NULL);
3812
3813 if (!qdict_get_try_str(qdict, "node-name")) {
Kevin Wolff8746fb2016-03-16 11:14:31 +01003814 QDECREF(qdict);
Kevin Wolfabb21ac2016-02-23 17:33:24 +01003815 error_report("'node-name' needs to be specified");
3816 goto out;
3817 }
3818
3819 BlockDriverState *bs = bds_tree_init(qdict, &local_err);
3820 if (!bs) {
3821 error_report_err(local_err);
3822 goto out;
3823 }
3824
3825 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
3826
3827out:
3828 qemu_opts_del(opts);
3829}
3830
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003831void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
3832{
Max Reitzbe4b67b2015-10-19 17:53:09 +02003833 BlockDriverState *bs;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003834 QObject *obj;
Daniel P. Berrange7d5e1992016-09-30 15:45:28 +01003835 Visitor *v = qobject_output_visitor_new(&obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003836 QDict *qdict;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003837 Error *local_err = NULL;
3838
Eric Blake3b098d52016-06-09 10:48:43 -06003839 visit_type_BlockdevOptions(v, NULL, &options, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003840 if (local_err) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003841 error_propagate(errp, local_err);
3842 goto fail;
3843 }
3844
Eric Blake3b098d52016-06-09 10:48:43 -06003845 visit_complete(v, &obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003846 qdict = qobject_to_qdict(obj);
3847
3848 qdict_flatten(qdict);
3849
Kevin Wolf9ec88732016-09-21 14:56:11 +02003850 if (!qdict_get_try_str(qdict, "node-name")) {
3851 error_setg(errp, "'node-name' must be specified for the root node");
3852 goto fail;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003853 }
3854
Kevin Wolf9ec88732016-09-21 14:56:11 +02003855 bs = bds_tree_init(qdict, errp);
3856 if (!bs) {
3857 goto fail;
3858 }
3859
3860 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
3861
Max Reitzbe4b67b2015-10-19 17:53:09 +02003862 if (bs && bdrv_key_required(bs)) {
Kevin Wolf9ec88732016-09-21 14:56:11 +02003863 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
3864 bdrv_unref(bs);
Kevin Wolf8ae8e902014-03-06 15:43:42 +01003865 error_setg(errp, "blockdev-add doesn't support encrypted devices");
3866 goto fail;
3867 }
3868
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003869fail:
Eric Blake3b098d52016-06-09 10:48:43 -06003870 visit_free(v);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003871}
3872
Kevin Wolf9ec88732016-09-21 14:56:11 +02003873void qmp_x_blockdev_del(const char *node_name, Error **errp)
Alberto Garcia81b936a2015-11-02 16:51:55 +02003874{
3875 AioContext *aio_context;
Alberto Garcia81b936a2015-11-02 16:51:55 +02003876 BlockDriverState *bs;
3877
Kevin Wolf9ec88732016-09-21 14:56:11 +02003878 bs = bdrv_find_node(node_name);
3879 if (!bs) {
3880 error_setg(errp, "Cannot find node %s", node_name);
Alberto Garcia81b936a2015-11-02 16:51:55 +02003881 return;
3882 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02003883 if (bdrv_has_blk(bs)) {
3884 error_setg(errp, "Node %s is in use", node_name);
3885 return;
Alberto Garcia81b936a2015-11-02 16:51:55 +02003886 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02003887 aio_context = bdrv_get_aio_context(bs);
Alberto Garcia81b936a2015-11-02 16:51:55 +02003888 aio_context_acquire(aio_context);
3889
Kevin Wolf9ec88732016-09-21 14:56:11 +02003890 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
3891 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02003892 }
3893
Kevin Wolf9ec88732016-09-21 14:56:11 +02003894 if (!bs->monitor_list.tqe_prev) {
3895 error_setg(errp, "Node %s is not owned by the monitor",
3896 bs->node_name);
3897 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02003898 }
3899
Kevin Wolf9ec88732016-09-21 14:56:11 +02003900 if (bs->refcnt > 1) {
3901 error_setg(errp, "Block device %s is in use",
3902 bdrv_get_device_or_node_name(bs));
3903 goto out;
3904 }
3905
3906 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
3907 bdrv_unref(bs);
3908
Alberto Garcia81b936a2015-11-02 16:51:55 +02003909out:
3910 aio_context_release(aio_context);
3911}
3912
Wen Congyang7f821592016-05-10 15:36:39 +08003913static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs,
3914 const char *child_name)
3915{
3916 BdrvChild *child;
3917
3918 QLIST_FOREACH(child, &parent_bs->children, next) {
3919 if (strcmp(child->name, child_name) == 0) {
3920 return child;
3921 }
3922 }
3923
3924 return NULL;
3925}
3926
3927void qmp_x_blockdev_change(const char *parent, bool has_child,
3928 const char *child, bool has_node,
3929 const char *node, Error **errp)
3930{
3931 BlockDriverState *parent_bs, *new_bs = NULL;
3932 BdrvChild *p_child;
3933
3934 parent_bs = bdrv_lookup_bs(parent, parent, errp);
3935 if (!parent_bs) {
3936 return;
3937 }
3938
3939 if (has_child == has_node) {
3940 if (has_child) {
3941 error_setg(errp, "The parameters child and node are in conflict");
3942 } else {
3943 error_setg(errp, "Either child or node must be specified");
3944 }
3945 return;
3946 }
3947
3948 if (has_child) {
3949 p_child = bdrv_find_child(parent_bs, child);
3950 if (!p_child) {
3951 error_setg(errp, "Node '%s' does not have child '%s'",
3952 parent, child);
3953 return;
3954 }
3955 bdrv_del_child(parent_bs, p_child, errp);
3956 }
3957
3958 if (has_node) {
3959 new_bs = bdrv_find_node(node);
3960 if (!new_bs) {
3961 error_setg(errp, "Node '%s' not found", node);
3962 return;
3963 }
3964 bdrv_add_child(parent_bs, new_bs, errp);
3965 }
3966}
3967
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00003968BlockJobInfoList *qmp_query_block_jobs(Error **errp)
3969{
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02003970 BlockJobInfoList *head = NULL, **p_next = &head;
Alberto Garciaf0f55de2016-05-27 12:53:37 +02003971 BlockJob *job;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02003972
Alberto Garciaf0f55de2016-05-27 12:53:37 +02003973 for (job = block_job_next(NULL); job; job = block_job_next(job)) {
John Snow559b9352016-10-27 12:06:55 -04003974 BlockJobInfoList *elem;
3975 AioContext *aio_context;
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01003976
John Snow559b9352016-10-27 12:06:55 -04003977 if (block_job_is_internal(job)) {
3978 continue;
3979 }
3980 elem = g_new0(BlockJobInfoList, 1);
3981 aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01003982 aio_context_acquire(aio_context);
John Snow559b9352016-10-27 12:06:55 -04003983 elem->value = block_job_query(job, errp);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01003984 aio_context_release(aio_context);
John Snow559b9352016-10-27 12:06:55 -04003985 if (!elem->value) {
3986 g_free(elem);
3987 qapi_free_BlockJobInfoList(head);
3988 return NULL;
3989 }
Alberto Garciaf0f55de2016-05-27 12:53:37 +02003990 *p_next = elem;
3991 p_next = &elem->next;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02003992 }
3993
3994 return head;
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00003995}
Paolo Bonzini4d454572012-11-26 16:03:42 +01003996
Kevin Wolf00063832013-03-15 10:35:07 +01003997QemuOptsList qemu_common_drive_opts = {
Paolo Bonzini4d454572012-11-26 16:03:42 +01003998 .name = "drive",
Kevin Wolf00063832013-03-15 10:35:07 +01003999 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
Paolo Bonzini4d454572012-11-26 16:03:42 +01004000 .desc = {
4001 {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004002 .name = "snapshot",
4003 .type = QEMU_OPT_BOOL,
4004 .help = "enable/disable snapshot mode",
4005 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004006 .name = "aio",
4007 .type = QEMU_OPT_STRING,
4008 .help = "host AIO implementation (threads, native)",
4009 },{
Kevin Wolfe4b24b42016-03-15 15:39:42 +01004010 .name = BDRV_OPT_CACHE_WB,
4011 .type = QEMU_OPT_BOOL,
4012 .help = "Enable writeback mode",
4013 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004014 .name = "format",
4015 .type = QEMU_OPT_STRING,
4016 .help = "disk format (raw, qcow2, ...)",
4017 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004018 .name = "rerror",
4019 .type = QEMU_OPT_STRING,
4020 .help = "read error action",
4021 },{
4022 .name = "werror",
4023 .type = QEMU_OPT_STRING,
4024 .help = "write error action",
4025 },{
Alberto Garcia4e200cf2016-09-15 17:53:05 +03004026 .name = BDRV_OPT_READ_ONLY,
Paolo Bonzini4d454572012-11-26 16:03:42 +01004027 .type = QEMU_OPT_BOOL,
4028 .help = "open drive file as read-only",
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +01004029 },
4030
4031 THROTTLE_OPTS,
4032
4033 {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02004034 .name = "throttling.group",
4035 .type = QEMU_OPT_STRING,
4036 .help = "name of the block throttling group",
4037 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004038 .name = "copy-on-read",
4039 .type = QEMU_OPT_BOOL,
4040 .help = "copy read data from backing file into image file",
Peter Lieven465bee12014-05-18 00:58:19 +02004041 },{
4042 .name = "detect-zeroes",
4043 .type = QEMU_OPT_STRING,
4044 .help = "try to optimize zero writes (off, on, unmap)",
Alberto Garcia362e9292015-10-28 17:33:04 +02004045 },{
4046 .name = "stats-account-invalid",
4047 .type = QEMU_OPT_BOOL,
4048 .help = "whether to account for invalid I/O operations "
4049 "in the statistics",
4050 },{
4051 .name = "stats-account-failed",
4052 .type = QEMU_OPT_BOOL,
4053 .help = "whether to account for failed I/O operations "
4054 "in the statistics",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004055 },
4056 { /* end of list */ }
4057 },
4058};
Kevin Wolf00063832013-03-15 10:35:07 +01004059
4060QemuOptsList qemu_drive_opts = {
4061 .name = "drive",
4062 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4063 .desc = {
Kevin Wolf492fdc62013-06-19 13:44:17 +02004064 /*
4065 * no elements => accept any params
4066 * validation will happen later
4067 */
Kevin Wolf00063832013-03-15 10:35:07 +01004068 { /* end of list */ }
4069 },
4070};