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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"
Max Reitz609f45e2018-06-14 21:14:28 +020038#include "block/qdict.h"
Alberto Garcia76f4afb2015-06-08 18:17:44 +020039#include "block/throttle-groups.h"
Paolo Bonzini83c90892012-12-17 18:19:49 +010040#include "monitor/monitor.h"
Markus Armbrusterd49b6832015-03-17 18:29:20 +010041#include "qemu/error-report.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010042#include "qemu/option.h"
43#include "qemu/config-file.h"
Markus Armbruster9af23982018-02-11 10:36:01 +010044#include "qapi/qapi-commands-block.h"
45#include "qapi/qapi-commands-transaction.h"
46#include "qapi/qapi-visit-block-core.h"
Markus Armbruster452fcdb2018-02-01 12:18:39 +010047#include "qapi/qmp/qdict.h"
Markus Armbruster15280c32018-02-01 12:18:36 +010048#include "qapi/qmp/qnum.h"
Markus Armbruster6b673952018-02-01 12:18:35 +010049#include "qapi/qmp/qstring.h"
Markus Armbrustere688df62018-02-01 12:18:31 +010050#include "qapi/error.h"
Markus Armbrustercc7a8ea2015-03-17 17:22:46 +010051#include "qapi/qmp/qerror.h"
Markus Armbruster47e6b292018-02-01 12:18:38 +010052#include "qapi/qmp/qlist.h"
Daniel P. Berrangeb3db2112016-09-30 15:45:27 +010053#include "qapi/qobject-output-visitor.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010054#include "sysemu/sysemu.h"
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +000055#include "sysemu/iothread.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010056#include "block/block_int.h"
Daniel P. Berrange0ab8ed12017-01-25 16:14:15 +000057#include "block/trace.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010058#include "sysemu/arch_init.h"
Thomas Huthc616f162017-05-12 12:33:49 +020059#include "sysemu/qtest.h"
Veronia Bahaaf348b6d2016-03-20 19:16:19 +020060#include "qemu/cutils.h"
61#include "qemu/help_option.h"
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +010062#include "qemu/throttle-options.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020063
Max Reitz9c4218e2016-01-29 16:36:12 +010064static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
65 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
66
Kevin Wolfb33945c2016-09-20 13:38:43 +020067static int do_open_tray(const char *blk_name, const char *qdev_id,
68 bool force, Error **errp);
Max Reitz82fcf662017-11-10 23:43:01 +010069static void blockdev_remove_medium(bool has_device, const char *device,
70 bool has_id, const char *id, Error **errp);
71static void blockdev_insert_medium(bool has_device, const char *device,
72 bool has_id, const char *id,
73 const char *node_name, Error **errp);
Colin Lordbf18bee2016-06-06 14:15:22 -040074
Markus Armbruster19609662011-01-28 11:21:39 +010075static const char *const if_name[IF_COUNT] = {
76 [IF_NONE] = "none",
77 [IF_IDE] = "ide",
78 [IF_SCSI] = "scsi",
79 [IF_FLOPPY] = "floppy",
80 [IF_PFLASH] = "pflash",
81 [IF_MTD] = "mtd",
82 [IF_SD] = "sd",
83 [IF_VIRTIO] = "virtio",
84 [IF_XEN] = "xen",
85};
86
John Snow21dff8c2014-10-01 14:19:25 -040087static int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010088 /*
89 * Do not change these numbers! They govern how drive option
90 * index maps to unit and bus. That mapping is ABI.
91 *
Wei Jiangang547cb152016-04-26 18:12:43 +080092 * All controllers used to implement if=T drives need to support
Markus Armbruster27d6bf42011-01-28 11:21:40 +010093 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
94 * Otherwise, some index values map to "impossible" bus, unit
95 * values.
96 *
97 * For instance, if you change [IF_SCSI] to 255, -drive
98 * if=scsi,index=12 no longer means bus=1,unit=5, but
99 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
100 * the drive can't be set up. Regression.
101 */
102 [IF_IDE] = 2,
103 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +0100104};
105
John Snow21dff8c2014-10-01 14:19:25 -0400106/**
107 * Boards may call this to offer board-by-board overrides
108 * of the default, global values.
109 */
110void override_max_devs(BlockInterfaceType type, int max_devs)
111{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200112 BlockBackend *blk;
John Snow21dff8c2014-10-01 14:19:25 -0400113 DriveInfo *dinfo;
114
115 if (max_devs <= 0) {
116 return;
117 }
118
Markus Armbruster18e46a02014-10-07 13:59:06 +0200119 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
120 dinfo = blk_legacy_dinfo(blk);
John Snow21dff8c2014-10-01 14:19:25 -0400121 if (dinfo->type == type) {
122 fprintf(stderr, "Cannot override units-per-bus property of"
123 " the %s interface, because a drive of that type has"
124 " already been added.\n", if_name[type]);
125 g_assert_not_reached();
126 }
127 }
128
129 if_max_devs[type] = max_devs;
130}
131
Markus Armbruster14bafc52010-06-25 08:09:10 +0200132/*
133 * We automatically delete the drive when a device using it gets
134 * unplugged. Questionable feature, but we can't just drop it.
135 * Device models call blockdev_mark_auto_del() to schedule the
136 * automatic deletion, and generic qdev code calls blockdev_auto_del()
137 * when deletion is actually safe.
138 */
Markus Armbruster4be74632014-10-07 13:59:18 +0200139void blockdev_mark_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200140{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200141 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster4be74632014-10-07 13:59:18 +0200142 BlockDriverState *bs = blk_bs(blk);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100143 AioContext *aio_context;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200144
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200145 if (!dinfo) {
Kevin Wolf2d246f02013-09-18 15:14:47 +0200146 return;
147 }
148
Max Reitz5433c242015-10-19 17:53:29 +0200149 if (bs) {
150 aio_context = bdrv_get_aio_context(bs);
151 aio_context_acquire(aio_context);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100152
Max Reitz5433c242015-10-19 17:53:29 +0200153 if (bs->job) {
Kevin Wolf3d70ff52018-04-24 16:13:52 +0200154 job_cancel(&bs->job->job, false);
Max Reitz5433c242015-10-19 17:53:29 +0200155 }
156
157 aio_context_release(aio_context);
Paolo Bonzini12bde0e2012-03-30 13:17:10 +0200158 }
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100159
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200160 dinfo->auto_del = 1;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200161}
162
Markus Armbruster4be74632014-10-07 13:59:18 +0200163void blockdev_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200164{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200165 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200166
Ryan Harper0fc0f1f2010-12-08 10:05:00 -0600167 if (dinfo && dinfo->auto_del) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100168 monitor_remove_blk(blk);
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +0200169 blk_unref(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200170 }
171}
172
John Snowd8f94e12014-10-01 14:19:27 -0400173/**
174 * Returns the current mapping of how many units per bus
175 * a particular interface can support.
176 *
177 * A positive integer indicates n units per bus.
178 * 0 implies the mapping has not been established.
179 * -1 indicates an invalid BlockInterfaceType was given.
180 */
181int drive_get_max_devs(BlockInterfaceType type)
182{
183 if (type >= IF_IDE && type < IF_COUNT) {
184 return if_max_devs[type];
185 }
186
187 return -1;
188}
189
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100190static int drive_index_to_bus_id(BlockInterfaceType type, int index)
191{
192 int max_devs = if_max_devs[type];
193 return max_devs ? index / max_devs : 0;
194}
195
196static int drive_index_to_unit_id(BlockInterfaceType type, int index)
197{
198 int max_devs = if_max_devs[type];
199 return max_devs ? index % max_devs : index;
200}
201
Markus Armbruster2292dda2011-01-28 11:21:41 +0100202QemuOpts *drive_def(const char *optstr)
203{
Markus Armbruster70b94332015-02-13 12:50:26 +0100204 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100205}
206
207QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100208 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200209{
Markus Armbruster666daa62010-06-02 18:48:27 +0200210 QemuOpts *opts;
211
Markus Armbruster2292dda2011-01-28 11:21:41 +0100212 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200213 if (!opts) {
214 return NULL;
215 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100216 if (type != IF_DEFAULT) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100217 qemu_opt_set(opts, "if", if_name[type], &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100218 }
219 if (index >= 0) {
Markus Armbrustera8b18f82015-02-13 15:50:43 +0100220 qemu_opt_set_number(opts, "index", index, &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100221 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200222 if (file)
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100223 qemu_opt_set(opts, "file", file, &error_abort);
Markus Armbruster666daa62010-06-02 18:48:27 +0200224 return opts;
225}
226
227DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
228{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200229 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200230 DriveInfo *dinfo;
231
Markus Armbruster18e46a02014-10-07 13:59:06 +0200232 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
233 dinfo = blk_legacy_dinfo(blk);
234 if (dinfo && dinfo->type == type
235 && dinfo->bus == bus && dinfo->unit == unit) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200236 return dinfo;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200237 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200238 }
239
240 return NULL;
241}
242
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100243void drive_check_orphaned(void)
John Snowa66c9dc2014-10-01 14:19:24 -0400244{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200245 BlockBackend *blk;
John Snowa66c9dc2014-10-01 14:19:24 -0400246 DriveInfo *dinfo;
Markus Armbruster664cc622017-02-15 11:05:45 +0100247 Location loc;
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100248 bool orphans = false;
John Snowa66c9dc2014-10-01 14:19:24 -0400249
Markus Armbruster18e46a02014-10-07 13:59:06 +0200250 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
251 dinfo = blk_legacy_dinfo(blk);
Markus Armbrustera7f53e22014-10-07 13:59:25 +0200252 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
John Snowa66c9dc2014-10-01 14:19:24 -0400253 dinfo->type != IF_NONE) {
Markus Armbruster664cc622017-02-15 11:05:45 +0100254 loc_push_none(&loc);
255 qemu_opts_loc_restore(dinfo->opts);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100256 error_report("machine type does not support"
Markus Armbruster664cc622017-02-15 11:05:45 +0100257 " if=%s,bus=%d,unit=%d",
258 if_name[dinfo->type], dinfo->bus, dinfo->unit);
259 loc_pop(&loc);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100260 orphans = true;
John Snowa66c9dc2014-10-01 14:19:24 -0400261 }
262 }
263
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100264 if (orphans) {
265 exit(1);
266 }
John Snowa66c9dc2014-10-01 14:19:24 -0400267}
268
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100269DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
270{
271 return drive_get(type,
272 drive_index_to_bus_id(type, index),
273 drive_index_to_unit_id(type, index));
274}
275
Markus Armbruster666daa62010-06-02 18:48:27 +0200276int drive_get_max_bus(BlockInterfaceType type)
277{
278 int max_bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200279 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200280 DriveInfo *dinfo;
281
282 max_bus = -1;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200283 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
284 dinfo = blk_legacy_dinfo(blk);
285 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200286 max_bus = dinfo->bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200287 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200288 }
289 return max_bus;
290}
291
Markus Armbruster13839972011-01-28 11:21:37 +0100292/* Get a block device. This should only be used for single-drive devices
293 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
294 appropriate bus. */
295DriveInfo *drive_get_next(BlockInterfaceType type)
296{
297 static int next_block_unit[IF_COUNT];
298
299 return drive_get(type, 0, next_block_unit[type]++);
300}
301
Markus Armbruster666daa62010-06-02 18:48:27 +0200302static void bdrv_format_print(void *opaque, const char *name)
303{
Markus Armbruster807105a2011-01-17 19:31:27 +0100304 error_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200305}
306
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000307typedef struct {
308 QEMUBH *bh;
Fam Zhengfa510eb2013-08-23 09:14:51 +0800309 BlockDriverState *bs;
310} BDRVPutRefBH;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000311
Kevin Wolfb6810722013-09-20 11:33:11 +0200312static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200313{
314 if (!strcmp(buf, "ignore")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200315 return BLOCKDEV_ON_ERROR_IGNORE;
Markus Armbruster666daa62010-06-02 18:48:27 +0200316 } else if (!is_read && !strcmp(buf, "enospc")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200317 return BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200318 } else if (!strcmp(buf, "stop")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200319 return BLOCKDEV_ON_ERROR_STOP;
Markus Armbruster666daa62010-06-02 18:48:27 +0200320 } else if (!strcmp(buf, "report")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200321 return BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200322 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200323 error_setg(errp, "'%s' invalid %s error action",
324 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200325 return -1;
326 }
327}
328
Alberto Garcia40119ef2015-11-16 11:28:38 +0200329static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
330 Error **errp)
331{
332 const QListEntry *entry;
333 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
334 switch (qobject_type(entry->value)) {
335
336 case QTYPE_QSTRING: {
337 unsigned long long length;
Max Reitz7dc847e2018-02-24 16:40:29 +0100338 const char *str = qstring_get_str(qobject_to(QString,
339 entry->value));
Alberto Garcia40119ef2015-11-16 11:28:38 +0200340 if (parse_uint_full(str, &length, 10) == 0 &&
341 length > 0 && length <= UINT_MAX) {
342 block_acct_add_interval(stats, (unsigned) length);
343 } else {
344 error_setg(errp, "Invalid interval length: %s", str);
345 return false;
346 }
347 break;
348 }
349
Marc-André Lureau01b2ffc2017-06-07 20:35:58 +0400350 case QTYPE_QNUM: {
Max Reitz7dc847e2018-02-24 16:40:29 +0100351 int64_t length = qnum_get_int(qobject_to(QNum, entry->value));
Marc-André Lureau01b2ffc2017-06-07 20:35:58 +0400352
Alberto Garcia40119ef2015-11-16 11:28:38 +0200353 if (length > 0 && length <= UINT_MAX) {
354 block_acct_add_interval(stats, (unsigned) length);
355 } else {
356 error_setg(errp, "Invalid interval length: %" PRId64, length);
357 return false;
358 }
359 break;
360 }
361
362 default:
363 error_setg(errp, "The specification of stats-intervals is invalid");
364 return false;
365 }
366 }
367 return true;
368}
369
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200370typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
371
Max Reitzfbf81752015-10-19 17:53:31 +0200372/* All parameters but @opts are optional and may be set to NULL. */
373static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
374 const char **throttling_group, ThrottleConfig *throttle_cfg,
375 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
376{
Max Reitzfbf81752015-10-19 17:53:31 +0200377 Error *local_error = NULL;
378 const char *aio;
379
380 if (bdrv_flags) {
Max Reitzfbf81752015-10-19 17:53:31 +0200381 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
382 *bdrv_flags |= BDRV_O_COPY_ON_READ;
383 }
384
Max Reitzfbf81752015-10-19 17:53:31 +0200385 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
386 if (!strcmp(aio, "native")) {
387 *bdrv_flags |= BDRV_O_NATIVE_AIO;
388 } else if (!strcmp(aio, "threads")) {
389 /* this is the default */
390 } else {
391 error_setg(errp, "invalid aio option");
392 return;
393 }
394 }
395 }
396
397 /* disk I/O throttling */
398 if (throttling_group) {
399 *throttling_group = qemu_opt_get(opts, "throttling.group");
400 }
401
402 if (throttle_cfg) {
Alberto Garcia1588ab52016-02-18 12:27:00 +0200403 throttle_config_init(throttle_cfg);
Max Reitzfbf81752015-10-19 17:53:31 +0200404 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
405 qemu_opt_get_number(opts, "throttling.bps-total", 0);
406 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
407 qemu_opt_get_number(opts, "throttling.bps-read", 0);
408 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
409 qemu_opt_get_number(opts, "throttling.bps-write", 0);
410 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
411 qemu_opt_get_number(opts, "throttling.iops-total", 0);
412 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
413 qemu_opt_get_number(opts, "throttling.iops-read", 0);
414 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
415 qemu_opt_get_number(opts, "throttling.iops-write", 0);
416
417 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
418 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
419 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
420 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
421 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
422 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
423 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
424 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
425 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
426 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
427 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
428 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
429
Alberto Garcia8a0fc182016-02-18 12:27:02 +0200430 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
431 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
432 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
433 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
434 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
435 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
436 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
437 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
438 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
439 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
440 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
441 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
442
Max Reitzfbf81752015-10-19 17:53:31 +0200443 throttle_cfg->op_size =
444 qemu_opt_get_number(opts, "throttling.iops-size", 0);
445
Alberto Garciad5851082016-02-18 12:26:59 +0200446 if (!throttle_is_valid(throttle_cfg, errp)) {
Max Reitzfbf81752015-10-19 17:53:31 +0200447 return;
448 }
449 }
450
451 if (detect_zeroes) {
452 *detect_zeroes =
Marc-André Lureauf7abe0e2017-08-24 10:46:10 +0200453 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup,
Max Reitzfbf81752015-10-19 17:53:31 +0200454 qemu_opt_get(opts, "detect-zeroes"),
Max Reitzfbf81752015-10-19 17:53:31 +0200455 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
456 &local_error);
457 if (local_error) {
458 error_propagate(errp, local_error);
459 return;
460 }
Max Reitzfbf81752015-10-19 17:53:31 +0200461 }
462}
463
Kevin Wolff298d072013-09-10 12:01:20 +0200464/* Takes the ownership of bs_opts */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200465static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
466 Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200467{
468 const char *buf;
Markus Armbruster666daa62010-06-02 18:48:27 +0200469 int bdrv_flags = 0;
470 int on_read_error, on_write_error;
Alberto Garcia362e9292015-10-28 17:33:04 +0200471 bool account_invalid, account_failed;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300472 bool writethrough, read_only;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200473 BlockBackend *blk;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200474 BlockDriverState *bs;
Benoît Canetcc0681c2013-09-02 14:14:39 +0200475 ThrottleConfig cfg;
Markus Armbruster666daa62010-06-02 18:48:27 +0200476 int snapshot = 0;
Stefan Hajnoczic5461942013-02-13 16:53:42 +0100477 Error *error = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100478 QemuOpts *opts;
Alberto Garcia40119ef2015-11-16 11:28:38 +0200479 QDict *interval_dict = NULL;
480 QList *interval_list = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100481 const char *id;
Max Reitzfbf81752015-10-19 17:53:31 +0200482 BlockdevDetectZeroesOptions detect_zeroes =
483 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
484 const char *throttling_group = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200485
Kevin Wolff298d072013-09-10 12:01:20 +0200486 /* Check common options by copying from bs_opts to opts, all other options
487 * stay in bs_opts for processing by bdrv_open(). */
488 id = qdict_get_try_str(bs_opts, "id");
Kevin Wolf00063832013-03-15 10:35:07 +0100489 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100490 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200491 error_propagate(errp, error);
Markus Armbruster6376f952014-05-28 11:17:01 +0200492 goto err_no_opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100493 }
494
Kevin Wolf00063832013-03-15 10:35:07 +0100495 qemu_opts_absorb_qdict(opts, bs_opts, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100496 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200497 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100498 goto early_err;
Kevin Wolf00063832013-03-15 10:35:07 +0100499 }
500
501 if (id) {
502 qdict_del(bs_opts, "id");
503 }
504
Markus Armbruster666daa62010-06-02 18:48:27 +0200505 /* extract parameters */
Markus Armbruster666daa62010-06-02 18:48:27 +0200506 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
Markus Armbruster666daa62010-06-02 18:48:27 +0200507
Alberto Garcia362e9292015-10-28 17:33:04 +0200508 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
509 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
510
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100511 writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
512
Alberto Garciaff356ee2016-07-08 17:03:00 +0300513 id = qemu_opts_id(opts);
514
Alberto Garcia40119ef2015-11-16 11:28:38 +0200515 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
516 qdict_array_split(interval_dict, &interval_list);
517
518 if (qdict_size(interval_dict) != 0) {
519 error_setg(errp, "Invalid option stats-intervals.%s",
520 qdict_first(interval_dict)->key);
521 goto early_err;
522 }
Alberto Garcia2be55062015-10-28 17:33:07 +0200523
Max Reitzfbf81752015-10-19 17:53:31 +0200524 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
525 &detect_zeroes, &error);
526 if (error) {
527 error_propagate(errp, error);
528 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200529 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200530
531 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
Peter Maydellc8057f92012-08-02 13:45:54 +0100532 if (is_help_option(buf)) {
533 error_printf("Supported formats:");
Andrey Shinkevich9ac404c2019-03-07 16:33:58 +0300534 bdrv_iterate_format(bdrv_format_print, NULL, false);
535 error_printf("\nSupported formats (read-only):");
536 bdrv_iterate_format(bdrv_format_print, NULL, true);
Peter Maydellc8057f92012-08-02 13:45:54 +0100537 error_printf("\n");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100538 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200539 }
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200540
Max Reitze4342ce2015-02-05 13:58:14 -0500541 if (qdict_haskey(bs_opts, "driver")) {
542 error_setg(errp, "Cannot specify both 'driver' and 'format'");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100543 goto early_err;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400544 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500545 qdict_put_str(bs_opts, "driver", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200546 }
547
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200548 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200549 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200550 on_write_error = parse_block_error_action(buf, 0, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100551 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200552 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100553 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200554 }
555 }
556
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200557 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200558 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200559 on_read_error = parse_block_error_action(buf, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100560 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200561 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100562 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200563 }
564 }
565
Max Reitz5ec18f82015-10-19 17:53:30 +0200566 if (snapshot) {
Kevin Wolf91a097e2015-05-08 17:49:53 +0200567 bdrv_flags |= BDRV_O_SNAPSHOT;
Max Reitz5ec18f82015-10-19 17:53:30 +0200568 }
569
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300570 read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false);
571
Kevin Wolf326642b2013-07-11 12:52:34 +0200572 /* init */
Kevin Wolf39c4ae92015-11-13 14:45:42 +0100573 if ((!file || !*file) && !qdict_size(bs_opts)) {
Max Reitz5ec18f82015-10-19 17:53:30 +0200574 BlockBackendRootState *blk_rs;
575
Kevin Wolf6d0eb642017-01-20 17:07:26 +0100576 blk = blk_new(0, BLK_PERM_ALL);
Max Reitz5ec18f82015-10-19 17:53:30 +0200577 blk_rs = blk_get_root_state(blk);
578 blk_rs->open_flags = bdrv_flags;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300579 blk_rs->read_only = read_only;
Max Reitz5ec18f82015-10-19 17:53:30 +0200580 blk_rs->detect_zeroes = detect_zeroes;
581
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200582 qobject_unref(bs_opts);
Max Reitze4342ce2015-02-05 13:58:14 -0500583 } else {
584 if (file && !*file) {
585 file = NULL;
586 }
587
Kevin Wolf91a097e2015-05-08 17:49:53 +0200588 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
589 * with other callers) rather than what we want as the real defaults.
590 * Apply the defaults here instead. */
Kevin Wolf91a097e2015-05-08 17:49:53 +0200591 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
592 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300593 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY,
594 read_only ? "on" : "off");
Kevin Wolf9384a442018-10-17 18:24:30 +0200595 qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on");
Kevin Wolf72e775c2016-03-15 14:34:37 +0100596 assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
Kevin Wolf91a097e2015-05-08 17:49:53 +0200597
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100598 if (runstate_check(RUN_STATE_INMIGRATE)) {
599 bdrv_flags |= BDRV_O_INACTIVE;
600 }
601
Max Reitzefaa7c42016-03-16 19:54:38 +0100602 blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
Max Reitze4342ce2015-02-05 13:58:14 -0500603 if (!blk) {
604 goto err_no_bs_opts;
605 }
606 bs = blk_bs(blk);
Max Reitze4342ce2015-02-05 13:58:14 -0500607
Max Reitz5ec18f82015-10-19 17:53:30 +0200608 bs->detect_zeroes = detect_zeroes;
609
Paolo Bonzini9caa6f32017-06-05 14:39:07 +0200610 block_acct_setup(blk_get_stats(blk), account_invalid, account_failed);
Alberto Garcia2be55062015-10-28 17:33:07 +0200611
Alberto Garcia40119ef2015-11-16 11:28:38 +0200612 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
613 blk_unref(blk);
614 blk = NULL;
615 goto err_no_bs_opts;
Alberto Garcia2be55062015-10-28 17:33:07 +0200616 }
Max Reitz5ec18f82015-10-19 17:53:30 +0200617 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200618
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100619 /* disk I/O throttling */
620 if (throttle_enabled(&cfg)) {
621 if (!throttling_group) {
Alberto Garciaff356ee2016-07-08 17:03:00 +0300622 throttling_group = id;
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100623 }
624 blk_io_limits_enable(blk, throttling_group);
625 blk_set_io_limits(blk, &cfg);
626 }
627
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100628 blk_set_enable_write_cache(blk, !writethrough);
Max Reitz373340b2015-10-19 17:53:22 +0200629 blk_set_on_error(blk, on_read_error, on_write_error);
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200630
Alberto Garciaff356ee2016-07-08 17:03:00 +0300631 if (!monitor_add_blk(blk, id, errp)) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100632 blk_unref(blk);
633 blk = NULL;
634 goto err_no_bs_opts;
635 }
636
Max Reitze4342ce2015-02-05 13:58:14 -0500637err_no_bs_opts:
Kevin Wolf00063832013-03-15 10:35:07 +0100638 qemu_opts_del(opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200639 qobject_unref(interval_dict);
640 qobject_unref(interval_list);
Markus Armbruster18e46a02014-10-07 13:59:06 +0200641 return blk;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100642
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100643early_err:
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100644 qemu_opts_del(opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200645 qobject_unref(interval_dict);
646 qobject_unref(interval_list);
Markus Armbruster6376f952014-05-28 11:17:01 +0200647err_no_opts:
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200648 qobject_unref(bs_opts);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100649 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200650}
651
Max Reitzbd745e22015-10-19 17:53:32 +0200652/* Takes the ownership of bs_opts */
653static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
654{
Max Reitzbd745e22015-10-19 17:53:32 +0200655 int bdrv_flags = 0;
656
Kevin Wolfa81d6162016-03-07 14:23:04 +0100657 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
658 * with other callers) rather than what we want as the real defaults.
659 * Apply the defaults here instead. */
Kevin Wolfa81d6162016-03-07 14:23:04 +0100660 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
661 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300662 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off");
Kevin Wolfa81d6162016-03-07 14:23:04 +0100663
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100664 if (runstate_check(RUN_STATE_INMIGRATE)) {
665 bdrv_flags |= BDRV_O_INACTIVE;
666 }
667
Kevin Wolf74e1ae72016-09-20 20:48:52 +0200668 return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
Max Reitzbd745e22015-10-19 17:53:32 +0200669}
670
Max Reitz9c4218e2016-01-29 16:36:12 +0100671void blockdev_close_all_bdrv_states(void)
672{
673 BlockDriverState *bs, *next_bs;
674
675 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
676 AioContext *ctx = bdrv_get_aio_context(bs);
677
678 aio_context_acquire(ctx);
679 bdrv_unref(bs);
680 aio_context_release(ctx);
681 }
682}
683
Max Reitz262b4e82016-03-16 19:54:41 +0100684/* Iterates over the list of monitor-owned BlockDriverStates */
685BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
686{
687 return bs ? QTAILQ_NEXT(bs, monitor_list)
688 : QTAILQ_FIRST(&monitor_bdrv_states);
689}
690
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200691static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
692 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200693{
694 const char *value;
695
696 value = qemu_opt_get(opts, from);
697 if (value) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200698 if (qemu_opt_find(opts, to)) {
699 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
700 "same time", to, from);
701 return;
702 }
Jun Li20d6cd42014-09-24 13:45:27 +0800703 }
704
705 /* rename all items in opts */
706 while ((value = qemu_opt_get(opts, from))) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100707 qemu_opt_set(opts, to, value, &error_abort);
Kevin Wolf57975222013-07-17 14:41:54 +0200708 qemu_opt_unset(opts, from);
709 }
710}
711
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200712QemuOptsList qemu_legacy_drive_opts = {
713 .name = "drive",
714 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
715 .desc = {
716 {
Kevin Wolf87a899c2013-09-10 15:48:13 +0200717 .name = "bus",
718 .type = QEMU_OPT_NUMBER,
719 .help = "bus number",
720 },{
721 .name = "unit",
722 .type = QEMU_OPT_NUMBER,
723 .help = "unit number (i.e. lun for scsi)",
724 },{
725 .name = "index",
726 .type = QEMU_OPT_NUMBER,
727 .help = "index number",
728 },{
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200729 .name = "media",
730 .type = QEMU_OPT_STRING,
731 .help = "media type (disk, cdrom)",
Kevin Wolf593d4642013-08-28 17:24:51 +0200732 },{
733 .name = "if",
734 .type = QEMU_OPT_STRING,
735 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
Kevin Wolfb41a7332013-09-09 16:49:49 +0200736 },{
Max Reitzd095b462013-12-20 19:28:14 +0100737 .name = "file",
738 .type = QEMU_OPT_STRING,
739 .help = "file name",
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200740 },
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200741
742 /* Options that are passed on, but have special semantics with -drive */
743 {
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300744 .name = BDRV_OPT_READ_ONLY,
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200745 .type = QEMU_OPT_BOOL,
746 .help = "open drive file as read-only",
747 },{
Kevin Wolfee13ed12014-02-09 09:52:32 +0100748 .name = "rerror",
749 .type = QEMU_OPT_STRING,
750 .help = "read error action",
751 },{
752 .name = "werror",
753 .type = QEMU_OPT_STRING,
754 .help = "write error action",
755 },{
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200756 .name = "copy-on-read",
757 .type = QEMU_OPT_BOOL,
758 .help = "copy read data from backing file into image file",
759 },
760
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200761 { /* end of list */ }
762 },
763};
764
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200765DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type,
766 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200767{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200768 const char *value;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200769 BlockBackend *blk;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200770 DriveInfo *dinfo = NULL;
Kevin Wolff298d072013-09-10 12:01:20 +0200771 QDict *bs_opts;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200772 QemuOpts *legacy_opts;
773 DriveMediaType media = MEDIA_DISK;
Kevin Wolf593d4642013-08-28 17:24:51 +0200774 BlockInterfaceType type;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200775 int max_devs, bus_id, unit_id, index;
Kevin Wolfee13ed12014-02-09 09:52:32 +0100776 const char *werror, *rerror;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800777 bool read_only = false;
778 bool copy_on_read;
Max Reitzd095b462013-12-20 19:28:14 +0100779 const char *filename;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200780 Error *local_err = NULL;
Kevin Wolf247147f2014-09-24 16:37:14 +0200781 int i;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200782
Kevin Wolf57975222013-07-17 14:41:54 +0200783 /* Change legacy command line options into QMP ones */
Kevin Wolf247147f2014-09-24 16:37:14 +0200784 static const struct {
785 const char *from;
786 const char *to;
787 } opt_renames[] = {
788 { "iops", "throttling.iops-total" },
789 { "iops_rd", "throttling.iops-read" },
790 { "iops_wr", "throttling.iops-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200791
Kevin Wolf247147f2014-09-24 16:37:14 +0200792 { "bps", "throttling.bps-total" },
793 { "bps_rd", "throttling.bps-read" },
794 { "bps_wr", "throttling.bps-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200795
Kevin Wolf247147f2014-09-24 16:37:14 +0200796 { "iops_max", "throttling.iops-total-max" },
797 { "iops_rd_max", "throttling.iops-read-max" },
798 { "iops_wr_max", "throttling.iops-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200799
Kevin Wolf247147f2014-09-24 16:37:14 +0200800 { "bps_max", "throttling.bps-total-max" },
801 { "bps_rd_max", "throttling.bps-read-max" },
802 { "bps_wr_max", "throttling.bps-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200803
Kevin Wolf247147f2014-09-24 16:37:14 +0200804 { "iops_size", "throttling.iops-size" },
Benoît Canet2024c1d2013-09-02 14:14:41 +0200805
Alberto Garcia76f4afb2015-06-08 18:17:44 +0200806 { "group", "throttling.group" },
807
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300808 { "readonly", BDRV_OPT_READ_ONLY },
Kevin Wolf247147f2014-09-24 16:37:14 +0200809 };
810
811 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200812 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
813 &local_err);
814 if (local_err) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200815 error_propagate(errp, local_err);
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200816 return NULL;
817 }
Kevin Wolf247147f2014-09-24 16:37:14 +0200818 }
Kevin Wolf0f227a92013-07-19 20:07:29 +0200819
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200820 value = qemu_opt_get(all_opts, "cache");
821 if (value) {
822 int flags = 0;
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100823 bool writethrough;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200824
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100825 if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200826 error_setg(errp, "invalid cache option");
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200827 return NULL;
828 }
829
830 /* Specific options take precedence */
Kevin Wolf54861b92015-04-07 16:55:00 +0200831 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
832 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100833 !writethrough, &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200834 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200835 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
836 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100837 !!(flags & BDRV_O_NOCACHE), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200838 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200839 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
840 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100841 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200842 }
843 qemu_opt_unset(all_opts, "cache");
844 }
845
Kevin Wolff298d072013-09-10 12:01:20 +0200846 /* Get a QDict for processing the options */
847 bs_opts = qdict_new();
848 qemu_opts_to_qdict(all_opts, bs_opts);
849
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800850 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
851 &error_abort);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200852 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100853 if (local_err) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200854 error_propagate(errp, local_err);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200855 goto fail;
856 }
857
858 /* Media type */
859 value = qemu_opt_get(legacy_opts, "media");
860 if (value) {
861 if (!strcmp(value, "disk")) {
862 media = MEDIA_DISK;
863 } else if (!strcmp(value, "cdrom")) {
864 media = MEDIA_CDROM;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800865 read_only = true;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200866 } else {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200867 error_setg(errp, "'%s' invalid media", value);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200868 goto fail;
869 }
870 }
871
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200872 /* copy-on-read is disabled with a warning for read-only devices */
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300873 read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false);
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200874 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
875
876 if (read_only && copy_on_read) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700877 warn_report("disabling copy-on-read on read-only drive");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200878 copy_on_read = false;
879 }
880
Eric Blake46f5ac22017-04-27 16:58:17 -0500881 qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off");
882 qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200883
Kevin Wolf593d4642013-08-28 17:24:51 +0200884 /* Controller type */
885 value = qemu_opt_get(legacy_opts, "if");
886 if (value) {
887 for (type = 0;
888 type < IF_COUNT && strcmp(value, if_name[type]);
889 type++) {
890 }
891 if (type == IF_COUNT) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200892 error_setg(errp, "unsupported bus type '%s'", value);
Kevin Wolf593d4642013-08-28 17:24:51 +0200893 goto fail;
894 }
895 } else {
896 type = block_default_type;
897 }
898
Kevin Wolf87a899c2013-09-10 15:48:13 +0200899 /* Device address specified by bus/unit or index.
900 * If none was specified, try to find the first free one. */
901 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
902 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
903 index = qemu_opt_get_number(legacy_opts, "index", -1);
904
905 max_devs = if_max_devs[type];
906
907 if (index != -1) {
908 if (bus_id != 0 || unit_id != -1) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200909 error_setg(errp, "index cannot be used with bus and unit");
Kevin Wolf87a899c2013-09-10 15:48:13 +0200910 goto fail;
911 }
912 bus_id = drive_index_to_bus_id(type, index);
913 unit_id = drive_index_to_unit_id(type, index);
914 }
915
916 if (unit_id == -1) {
917 unit_id = 0;
918 while (drive_get(type, bus_id, unit_id) != NULL) {
919 unit_id++;
920 if (max_devs && unit_id >= max_devs) {
921 unit_id -= max_devs;
922 bus_id++;
923 }
924 }
925 }
926
927 if (max_devs && unit_id >= max_devs) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200928 error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200929 goto fail;
930 }
931
932 if (drive_get(type, bus_id, unit_id) != NULL) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200933 error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists",
934 bus_id, unit_id, index);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200935 goto fail;
936 }
937
938 /* no id supplied -> create one */
939 if (qemu_opts_id(all_opts) == NULL) {
940 char *new_id;
941 const char *mediastr = "";
942 if (type == IF_IDE || type == IF_SCSI) {
943 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
944 }
945 if (max_devs) {
946 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
947 mediastr, unit_id);
948 } else {
949 new_id = g_strdup_printf("%s%s%i", if_name[type],
950 mediastr, unit_id);
951 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500952 qdict_put_str(bs_opts, "id", new_id);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200953 g_free(new_id);
954 }
955
Kevin Wolf394c7d42013-09-13 14:09:17 +0200956 /* Add virtio block device */
Kevin Wolf394c7d42013-09-13 14:09:17 +0200957 if (type == IF_VIRTIO) {
958 QemuOpts *devopts;
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800959 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
960 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200961 if (arch_type == QEMU_ARCH_S390X) {
Alexander Graf1f68f1d2015-06-16 23:06:33 +0200962 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200963 } else {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100964 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200965 }
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100966 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
967 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200968 }
969
Max Reitzd095b462013-12-20 19:28:14 +0100970 filename = qemu_opt_get(legacy_opts, "file");
971
Kevin Wolfee13ed12014-02-09 09:52:32 +0100972 /* Check werror/rerror compatibility with if=... */
973 werror = qemu_opt_get(legacy_opts, "werror");
974 if (werror != NULL) {
975 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
976 type != IF_NONE) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200977 error_setg(errp, "werror is not supported by this bus type");
Kevin Wolfee13ed12014-02-09 09:52:32 +0100978 goto fail;
979 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500980 qdict_put_str(bs_opts, "werror", werror);
Kevin Wolfee13ed12014-02-09 09:52:32 +0100981 }
982
983 rerror = qemu_opt_get(legacy_opts, "rerror");
984 if (rerror != NULL) {
985 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
986 type != IF_NONE) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200987 error_setg(errp, "rerror is not supported by this bus type");
Kevin Wolfee13ed12014-02-09 09:52:32 +0100988 goto fail;
989 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500990 qdict_put_str(bs_opts, "rerror", rerror);
Kevin Wolfee13ed12014-02-09 09:52:32 +0100991 }
992
Kevin Wolf2d246f02013-09-18 15:14:47 +0200993 /* Actual block device init: Functionality shared with blockdev-add */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200994 blk = blockdev_init(filename, bs_opts, &local_err);
Markus Armbruster3cb0e252014-05-28 11:17:02 +0200995 bs_opts = NULL;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200996 if (!blk) {
Markus Armbrusterb2322002018-12-13 18:31:13 +0100997 error_propagate(errp, local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +0200998 goto fail;
Kevin Wolfb6810722013-09-20 11:33:11 +0200999 } else {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001000 assert(!local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001001 }
1002
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001003 /* Create legacy DriveInfo */
1004 dinfo = g_malloc0(sizeof(*dinfo));
Kevin Wolff298d072013-09-10 12:01:20 +02001005 dinfo->opts = all_opts;
Kevin Wolf2d246f02013-09-18 15:14:47 +02001006
Kevin Wolfee13ed12014-02-09 09:52:32 +01001007 dinfo->type = type;
Kevin Wolf87a899c2013-09-10 15:48:13 +02001008 dinfo->bus = bus_id;
1009 dinfo->unit = unit_id;
Kevin Wolfbcf83152014-06-06 15:21:48 +02001010
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001011 blk_set_legacy_dinfo(blk, dinfo);
1012
Kevin Wolfe34ef042013-09-19 14:24:10 +02001013 switch(type) {
1014 case IF_IDE:
1015 case IF_SCSI:
1016 case IF_XEN:
1017 case IF_NONE:
1018 dinfo->media_cd = media == MEDIA_CDROM;
1019 break;
1020 default:
1021 break;
1022 }
1023
Kevin Wolf2d246f02013-09-18 15:14:47 +02001024fail:
Kevin Wolf33cb7dc2013-08-28 17:00:13 +02001025 qemu_opts_del(legacy_opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +02001026 qobject_unref(bs_opts);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001027 return dinfo;
Kevin Wolf57975222013-07-17 14:41:54 +02001028}
1029
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02001030static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp)
1031{
1032 BlockDriverState *bs;
1033
1034 bs = bdrv_lookup_bs(name, name, errp);
1035 if (bs == NULL) {
1036 return NULL;
1037 }
1038
1039 if (!bdrv_is_root_node(bs)) {
1040 error_setg(errp, "Need a root block node");
1041 return NULL;
1042 }
1043
1044 if (!bdrv_is_inserted(bs)) {
1045 error_setg(errp, "Device has no medium");
1046 return NULL;
1047 }
1048
1049 return bs;
1050}
1051
Kevin Wolfb33945c2016-09-20 13:38:43 +02001052static BlockBackend *qmp_get_blk(const char *blk_name, const char *qdev_id,
1053 Error **errp)
1054{
1055 BlockBackend *blk;
1056
1057 if (!blk_name == !qdev_id) {
1058 error_setg(errp, "Need exactly one of 'device' and 'id'");
1059 return NULL;
1060 }
1061
1062 if (qdev_id) {
1063 blk = blk_by_qdev_id(qdev_id, errp);
1064 } else {
1065 blk = blk_by_name(blk_name);
1066 if (blk == NULL) {
1067 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1068 "Device '%s' not found", blk_name);
1069 }
1070 }
1071
1072 return blk;
1073}
1074
Markus Armbruster3e5a50d2015-02-06 13:55:43 +01001075void hmp_commit(Monitor *mon, const QDict *qdict)
Markus Armbruster666daa62010-06-02 18:48:27 +02001076{
Markus Armbruster666daa62010-06-02 18:48:27 +02001077 const char *device = qdict_get_str(qdict, "device");
Fam Zhenga0e85442015-03-02 19:36:48 +08001078 BlockBackend *blk;
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001079 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +02001080
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001081 if (!strcmp(device, "all")) {
Max Reitzda31d592016-03-16 19:54:32 +01001082 ret = blk_commit_all();
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001083 } else {
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001084 BlockDriverState *bs;
1085 AioContext *aio_context;
1086
Fam Zhenga0e85442015-03-02 19:36:48 +08001087 blk = blk_by_name(device);
1088 if (!blk) {
Jeff Cody58513bd2013-01-18 12:45:35 -05001089 monitor_printf(mon, "Device '%s' not found\n", device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001090 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001091 }
Max Reitz5433c242015-10-19 17:53:29 +02001092 if (!blk_is_available(blk)) {
1093 monitor_printf(mon, "Device '%s' has no medium\n", device);
1094 return;
1095 }
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001096
1097 bs = blk_bs(blk);
1098 aio_context = bdrv_get_aio_context(bs);
1099 aio_context_acquire(aio_context);
1100
1101 ret = bdrv_commit(bs);
1102
1103 aio_context_release(aio_context);
Jeff Cody58513bd2013-01-18 12:45:35 -05001104 }
1105 if (ret < 0) {
1106 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1107 strerror(-ret));
Markus Armbruster666daa62010-06-02 18:48:27 +02001108 }
1109}
1110
Eric Blake10f75902016-03-03 09:16:50 -07001111static void blockdev_do_action(TransactionAction *action, Error **errp)
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001112{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001113 TransactionActionList list;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001114
Eric Blake10f75902016-03-03 09:16:50 -07001115 list.value = action;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001116 list.next = NULL;
John Snow94d16a62015-11-05 18:13:18 -05001117 qmp_transaction(&list, false, NULL, errp);
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001118}
1119
Benoît Canet0901f672014-01-23 21:31:38 +01001120void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1121 bool has_node_name, const char *node_name,
1122 const char *snapshot_file,
1123 bool has_snapshot_node_name,
1124 const char *snapshot_node_name,
Luiz Capitulino6106e242011-11-25 16:15:19 -02001125 bool has_format, const char *format,
Benoît Canet0901f672014-01-23 21:31:38 +01001126 bool has_mode, NewImageMode mode, Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +01001127{
Alberto Garciaa911e6a2015-10-26 14:27:14 +02001128 BlockdevSnapshotSync snapshot = {
Benoît Canet0901f672014-01-23 21:31:38 +01001129 .has_device = has_device,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001130 .device = (char *) device,
Benoît Canet0901f672014-01-23 21:31:38 +01001131 .has_node_name = has_node_name,
1132 .node_name = (char *) node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001133 .snapshot_file = (char *) snapshot_file,
Benoît Canet0901f672014-01-23 21:31:38 +01001134 .has_snapshot_node_name = has_snapshot_node_name,
1135 .snapshot_node_name = (char *) snapshot_node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001136 .has_format = has_format,
1137 .format = (char *) format,
1138 .has_mode = has_mode,
1139 .mode = mode,
1140 };
Eric Blake10f75902016-03-03 09:16:50 -07001141 TransactionAction action = {
1142 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001143 .u.blockdev_snapshot_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001144 };
1145 blockdev_do_action(&action, errp);
Jes Sorensenf8882562010-12-16 13:52:16 +01001146}
1147
Alberto Garcia43de7e22015-10-26 14:27:16 +02001148void qmp_blockdev_snapshot(const char *node, const char *overlay,
1149 Error **errp)
1150{
1151 BlockdevSnapshot snapshot_data = {
1152 .node = (char *) node,
1153 .overlay = (char *) overlay
1154 };
Eric Blake10f75902016-03-03 09:16:50 -07001155 TransactionAction action = {
1156 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
Eric Blake32bafa82016-03-17 16:48:37 -06001157 .u.blockdev_snapshot.data = &snapshot_data,
Eric Blake10f75902016-03-03 09:16:50 -07001158 };
1159 blockdev_do_action(&action, errp);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001160}
1161
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001162void qmp_blockdev_snapshot_internal_sync(const char *device,
1163 const char *name,
1164 Error **errp)
1165{
1166 BlockdevSnapshotInternal snapshot = {
1167 .device = (char *) device,
1168 .name = (char *) name
1169 };
Eric Blake10f75902016-03-03 09:16:50 -07001170 TransactionAction action = {
1171 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001172 .u.blockdev_snapshot_internal_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001173 };
1174 blockdev_do_action(&action, errp);
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001175}
1176
Wenchao Xia44e3e052013-09-11 14:04:36 +08001177SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1178 bool has_id,
1179 const char *id,
1180 bool has_name,
1181 const char *name,
1182 Error **errp)
1183{
Fam Zhenga0e85442015-03-02 19:36:48 +08001184 BlockDriverState *bs;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001185 AioContext *aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001186 QEMUSnapshotInfo sn;
1187 Error *local_err = NULL;
1188 SnapshotInfo *info = NULL;
1189 int ret;
1190
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001191 bs = qmp_get_root_bs(device, errp);
1192 if (!bs) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001193 return NULL;
1194 }
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001195 aio_context = bdrv_get_aio_context(bs);
Max Reitz5433c242015-10-19 17:53:29 +02001196 aio_context_acquire(aio_context);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001197
1198 if (!has_id) {
1199 id = NULL;
1200 }
1201
1202 if (!has_name) {
1203 name = NULL;
1204 }
1205
1206 if (!id && !name) {
1207 error_setg(errp, "Name or id must be provided");
Max Reitz5433c242015-10-19 17:53:29 +02001208 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001209 }
1210
Stefan Hajnoczi0b928852014-11-19 14:19:43 +00001211 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1212 goto out_aio_context;
1213 }
1214
Wenchao Xia44e3e052013-09-11 14:04:36 +08001215 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001216 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001217 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001218 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001219 }
1220 if (!ret) {
1221 error_setg(errp,
1222 "Snapshot with id '%s' and name '%s' does not exist on "
1223 "device '%s'",
1224 STR_OR_NULL(id), STR_OR_NULL(name), device);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001225 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001226 }
1227
1228 bdrv_snapshot_delete(bs, id, name, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001229 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001230 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001231 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001232 }
1233
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001234 aio_context_release(aio_context);
1235
Markus Armbruster5839e532014-08-19 10:31:08 +02001236 info = g_new0(SnapshotInfo, 1);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001237 info->id = g_strdup(sn.id_str);
1238 info->name = g_strdup(sn.name);
1239 info->date_nsec = sn.date_nsec;
1240 info->date_sec = sn.date_sec;
1241 info->vm_state_size = sn.vm_state_size;
1242 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1243 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1244
1245 return info;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001246
1247out_aio_context:
1248 aio_context_release(aio_context);
1249 return NULL;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001250}
Jeff Cody8802d1f2012-02-28 15:54:06 -05001251
John Snow341ebc22015-04-17 19:49:52 -04001252/**
1253 * block_dirty_bitmap_lookup:
1254 * Return a dirty bitmap (if present), after validating
1255 * the node reference and bitmap names.
1256 *
1257 * @node: The name of the BDS node to search for bitmaps
1258 * @name: The name of the bitmap to search for
1259 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1260 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1261 * @errp: Output pointer for error information. Can be NULL.
1262 *
1263 * @return: A bitmap object on success, or NULL on failure.
1264 */
1265static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1266 const char *name,
1267 BlockDriverState **pbs,
John Snow341ebc22015-04-17 19:49:52 -04001268 Error **errp)
1269{
1270 BlockDriverState *bs;
1271 BdrvDirtyBitmap *bitmap;
John Snow341ebc22015-04-17 19:49:52 -04001272
1273 if (!node) {
1274 error_setg(errp, "Node cannot be NULL");
1275 return NULL;
1276 }
1277 if (!name) {
1278 error_setg(errp, "Bitmap name cannot be NULL");
1279 return NULL;
1280 }
1281 bs = bdrv_lookup_bs(node, node, NULL);
1282 if (!bs) {
1283 error_setg(errp, "Node '%s' not found", node);
1284 return NULL;
1285 }
1286
John Snow341ebc22015-04-17 19:49:52 -04001287 bitmap = bdrv_find_dirty_bitmap(bs, name);
1288 if (!bitmap) {
1289 error_setg(errp, "Dirty bitmap '%s' not found", name);
Paolo Bonzini21198822017-06-05 14:39:03 +02001290 return NULL;
John Snow341ebc22015-04-17 19:49:52 -04001291 }
1292
1293 if (pbs) {
1294 *pbs = bs;
1295 }
John Snow341ebc22015-04-17 19:49:52 -04001296
1297 return bitmap;
John Snow341ebc22015-04-17 19:49:52 -04001298}
1299
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00001300/* New and old BlockDriverState structs for atomic group operations */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001301
John Snow50f43f02015-11-05 18:13:09 -05001302typedef struct BlkActionState BlkActionState;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001303
John Snow50f43f02015-11-05 18:13:09 -05001304/**
1305 * BlkActionOps:
1306 * Table of operations that define an Action.
1307 *
1308 * @instance_size: Size of state struct, in bytes.
1309 * @prepare: Prepare the work, must NOT be NULL.
1310 * @commit: Commit the changes, can be NULL.
1311 * @abort: Abort the changes on fail, can be NULL.
1312 * @clean: Clean up resources after all transaction actions have called
1313 * commit() or abort(). Can be NULL.
1314 *
1315 * Only prepare() may fail. In a single transaction, only one of commit() or
1316 * abort() will be called. clean() will always be called if it is present.
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001317 */
John Snow50f43f02015-11-05 18:13:09 -05001318typedef struct BlkActionOps {
1319 size_t instance_size;
1320 void (*prepare)(BlkActionState *common, Error **errp);
1321 void (*commit)(BlkActionState *common);
1322 void (*abort)(BlkActionState *common);
1323 void (*clean)(BlkActionState *common);
1324} BlkActionOps;
1325
1326/**
1327 * BlkActionState:
1328 * Describes one Action's state within a Transaction.
1329 *
1330 * @action: QAPI-defined enum identifying which Action to perform.
1331 * @ops: Table of ActionOps this Action can perform.
John Snow94d16a62015-11-05 18:13:18 -05001332 * @block_job_txn: Transaction which this action belongs to.
John Snow50f43f02015-11-05 18:13:09 -05001333 * @entry: List membership for all Actions in this Transaction.
1334 *
1335 * This structure must be arranged as first member in a subclassed type,
1336 * assuming that the compiler will also arrange it to the same offsets as the
1337 * base class.
1338 */
1339struct BlkActionState {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001340 TransactionAction *action;
John Snow50f43f02015-11-05 18:13:09 -05001341 const BlkActionOps *ops;
Kevin Wolf62c9e412018-04-19 16:09:52 +02001342 JobTxn *block_job_txn;
John Snow94d16a62015-11-05 18:13:18 -05001343 TransactionProperties *txn_props;
John Snowf4de0f82019-01-11 11:59:16 -06001344 QTAILQ_ENTRY(BlkActionState) entry;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001345};
1346
Wenchao Xiabbe86012013-09-11 14:04:34 +08001347/* internal snapshot private data */
1348typedef struct InternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001349 BlkActionState common;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001350 BlockDriverState *bs;
1351 QEMUSnapshotInfo sn;
Fam Zheng507306c2015-10-23 11:08:13 +08001352 bool created;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001353} InternalSnapshotState;
1354
John Snow94d16a62015-11-05 18:13:18 -05001355
1356static int action_check_completion_mode(BlkActionState *s, Error **errp)
1357{
1358 if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
1359 error_setg(errp,
1360 "Action '%s' does not support Transaction property "
1361 "completion-mode = %s",
Markus Armbruster977c7362017-08-24 10:46:08 +02001362 TransactionActionKind_str(s->action->type),
1363 ActionCompletionMode_str(s->txn_props->completion_mode));
John Snow94d16a62015-11-05 18:13:18 -05001364 return -1;
1365 }
1366 return 0;
1367}
1368
John Snow50f43f02015-11-05 18:13:09 -05001369static void internal_snapshot_prepare(BlkActionState *common,
Wenchao Xiabbe86012013-09-11 14:04:34 +08001370 Error **errp)
1371{
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001372 Error *local_err = NULL;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001373 const char *device;
1374 const char *name;
1375 BlockDriverState *bs;
1376 QEMUSnapshotInfo old_sn, *sn;
1377 bool ret;
1378 qemu_timeval tv;
1379 BlockdevSnapshotInternal *internal;
1380 InternalSnapshotState *state;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001381 AioContext *aio_context;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001382 int ret1;
1383
Eric Blake6a8f9662015-10-26 16:34:54 -06001384 g_assert(common->action->type ==
Wenchao Xiabbe86012013-09-11 14:04:34 +08001385 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
Eric Blake32bafa82016-03-17 16:48:37 -06001386 internal = common->action->u.blockdev_snapshot_internal_sync.data;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001387 state = DO_UPCAST(InternalSnapshotState, common, common);
1388
1389 /* 1. parse input */
1390 device = internal->device;
1391 name = internal->name;
1392
1393 /* 2. check for validation */
John Snow94d16a62015-11-05 18:13:18 -05001394 if (action_check_completion_mode(common, errp) < 0) {
1395 return;
1396 }
1397
Kevin Wolf75dfd402016-06-23 14:20:24 +02001398 bs = qmp_get_root_bs(device, errp);
1399 if (!bs) {
Wenchao Xiabbe86012013-09-11 14:04:34 +08001400 return;
1401 }
1402
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001403 aio_context = bdrv_get_aio_context(bs);
1404 aio_context_acquire(aio_context);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001405
Fam Zheng507306c2015-10-23 11:08:13 +08001406 state->bs = bs;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001407
1408 /* Paired with .clean() */
Fam Zheng507306c2015-10-23 11:08:13 +08001409 bdrv_drained_begin(bs);
1410
Stefan Hajnoczi3dc7ca32014-11-21 10:49:00 +00001411 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001412 goto out;
Stefan Hajnoczi3dc7ca32014-11-21 10:49:00 +00001413 }
1414
Wenchao Xiabbe86012013-09-11 14:04:34 +08001415 if (bdrv_is_read_only(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001416 error_setg(errp, "Device '%s' is read only", device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001417 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001418 }
1419
1420 if (!bdrv_can_snapshot(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001421 error_setg(errp, "Block format '%s' used by device '%s' "
1422 "does not support internal snapshots",
1423 bs->drv->format_name, device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001424 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001425 }
1426
1427 if (!strlen(name)) {
1428 error_setg(errp, "Name is empty");
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001429 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001430 }
1431
1432 /* check whether a snapshot with name exist */
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001433 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1434 &local_err);
1435 if (local_err) {
1436 error_propagate(errp, local_err);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001437 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001438 } else if (ret) {
1439 error_setg(errp,
1440 "Snapshot with name '%s' already exists on device '%s'",
1441 name, device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001442 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001443 }
1444
1445 /* 3. take the snapshot */
1446 sn = &state->sn;
1447 pstrcpy(sn->name, sizeof(sn->name), name);
1448 qemu_gettimeofday(&tv);
1449 sn->date_sec = tv.tv_sec;
1450 sn->date_nsec = tv.tv_usec * 1000;
1451 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1452
1453 ret1 = bdrv_snapshot_create(bs, sn);
1454 if (ret1 < 0) {
1455 error_setg_errno(errp, -ret1,
1456 "Failed to create snapshot '%s' on device '%s'",
1457 name, device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001458 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001459 }
1460
1461 /* 4. succeed, mark a snapshot is created */
Fam Zheng507306c2015-10-23 11:08:13 +08001462 state->created = true;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001463
1464out:
1465 aio_context_release(aio_context);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001466}
1467
John Snow50f43f02015-11-05 18:13:09 -05001468static void internal_snapshot_abort(BlkActionState *common)
Wenchao Xiabbe86012013-09-11 14:04:34 +08001469{
1470 InternalSnapshotState *state =
1471 DO_UPCAST(InternalSnapshotState, common, common);
1472 BlockDriverState *bs = state->bs;
1473 QEMUSnapshotInfo *sn = &state->sn;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001474 AioContext *aio_context;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001475 Error *local_error = NULL;
1476
Fam Zheng507306c2015-10-23 11:08:13 +08001477 if (!state->created) {
Wenchao Xiabbe86012013-09-11 14:04:34 +08001478 return;
1479 }
1480
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001481 aio_context = bdrv_get_aio_context(state->bs);
1482 aio_context_acquire(aio_context);
1483
Wenchao Xiabbe86012013-09-11 14:04:34 +08001484 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
Markus Armbrusterc29b77f2015-12-18 16:35:14 +01001485 error_reportf_err(local_error,
1486 "Failed to delete snapshot with id '%s' and "
1487 "name '%s' on device '%s' in abort: ",
1488 sn->id_str, sn->name,
1489 bdrv_get_device_name(bs));
Wenchao Xiabbe86012013-09-11 14:04:34 +08001490 }
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001491
1492 aio_context_release(aio_context);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001493}
1494
John Snow50f43f02015-11-05 18:13:09 -05001495static void internal_snapshot_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001496{
1497 InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
1498 common, common);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001499 AioContext *aio_context;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001500
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001501 if (!state->bs) {
1502 return;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001503 }
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001504
1505 aio_context = bdrv_get_aio_context(state->bs);
1506 aio_context_acquire(aio_context);
1507
1508 bdrv_drained_end(state->bs);
1509
1510 aio_context_release(aio_context);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001511}
1512
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001513/* external snapshot private data */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001514typedef struct ExternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001515 BlkActionState common;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001516 BlockDriverState *old_bs;
1517 BlockDriverState *new_bs;
Kevin Wolf067acf22017-03-02 15:26:18 +01001518 bool overlay_appended;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001519} ExternalSnapshotState;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001520
John Snow50f43f02015-11-05 18:13:09 -05001521static void external_snapshot_prepare(BlkActionState *common,
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001522 Error **errp)
1523{
Max Reitz5b363932016-05-17 16:41:31 +02001524 int flags = 0;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001525 QDict *options = NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001526 Error *local_err = NULL;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001527 /* Device and node name of the image to generate the snapshot from */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001528 const char *device;
Benoît Canet0901f672014-01-23 21:31:38 +01001529 const char *node_name;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001530 /* Reference to the new image (for 'blockdev-snapshot') */
1531 const char *snapshot_ref;
1532 /* File name of the new image (for 'blockdev-snapshot-sync') */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001533 const char *new_image_file;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001534 ExternalSnapshotState *state =
1535 DO_UPCAST(ExternalSnapshotState, common, common);
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001536 TransactionAction *action = common->action;
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001537 AioContext *aio_context;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001538
Alberto Garcia43de7e22015-10-26 14:27:16 +02001539 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1540 * purpose but a different set of parameters */
1541 switch (action->type) {
1542 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
1543 {
Eric Blake32bafa82016-03-17 16:48:37 -06001544 BlockdevSnapshot *s = action->u.blockdev_snapshot.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001545 device = s->node;
1546 node_name = s->node;
1547 new_image_file = NULL;
1548 snapshot_ref = s->overlay;
1549 }
1550 break;
1551 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
1552 {
Eric Blake32bafa82016-03-17 16:48:37 -06001553 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001554 device = s->has_device ? s->device : NULL;
1555 node_name = s->has_node_name ? s->node_name : NULL;
1556 new_image_file = s->snapshot_file;
1557 snapshot_ref = NULL;
1558 }
1559 break;
1560 default:
1561 g_assert_not_reached();
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001562 }
1563
1564 /* start processing */
John Snow94d16a62015-11-05 18:13:18 -05001565 if (action_check_completion_mode(common, errp) < 0) {
1566 return;
1567 }
1568
Alberto Garcia43de7e22015-10-26 14:27:16 +02001569 state->old_bs = bdrv_lookup_bs(device, node_name, errp);
1570 if (!state->old_bs) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001571 return;
1572 }
1573
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001574 aio_context = bdrv_get_aio_context(state->old_bs);
1575 aio_context_acquire(aio_context);
1576
1577 /* Paired with .clean() */
Fam Zhengda763e82015-10-23 11:08:10 +08001578 bdrv_drained_begin(state->old_bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001579
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001580 if (!bdrv_is_inserted(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001581 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001582 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001583 }
1584
Fam Zheng3718d8a2014-05-23 21:29:43 +08001585 if (bdrv_op_is_blocked(state->old_bs,
1586 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001587 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001588 }
1589
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001590 if (!bdrv_is_read_only(state->old_bs)) {
1591 if (bdrv_flush(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001592 error_setg(errp, QERR_IO_ERROR);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001593 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001594 }
1595 }
1596
Benoît Canet212a5a82014-01-23 21:31:36 +01001597 if (!bdrv_is_first_non_filter(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001598 error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001599 goto out;
Benoît Canetf6186f42013-10-02 14:33:48 +02001600 }
1601
Alberto Garcia43de7e22015-10-26 14:27:16 +02001602 if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
Eric Blake32bafa82016-03-17 16:48:37 -06001603 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001604 const char *format = s->has_format ? s->format : "qcow2";
1605 enum NewImageMode mode;
1606 const char *snapshot_node_name =
1607 s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001608
Alberto Garcia43de7e22015-10-26 14:27:16 +02001609 if (node_name && !snapshot_node_name) {
1610 error_setg(errp, "New snapshot node name missing");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001611 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001612 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001613
1614 if (snapshot_node_name &&
1615 bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
1616 error_setg(errp, "New snapshot node name already in use");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001617 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001618 }
1619
1620 flags = state->old_bs->open_flags;
John Snow2a32c6e2017-07-17 20:34:21 -04001621 flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ);
1622 flags |= BDRV_O_NO_BACKING;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001623
1624 /* create new image w/backing file */
1625 mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1626 if (mode != NEW_IMAGE_MODE_EXISTING) {
Kevin Wolff86b8b52016-03-02 12:16:44 +01001627 int64_t size = bdrv_getlength(state->old_bs);
1628 if (size < 0) {
1629 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001630 goto out;
Kevin Wolff86b8b52016-03-02 12:16:44 +01001631 }
Max Reitzf30c66b2019-02-01 20:29:05 +01001632 bdrv_refresh_filename(state->old_bs);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001633 bdrv_img_create(new_image_file, format,
1634 state->old_bs->filename,
1635 state->old_bs->drv->format_name,
Fam Zheng92172832017-04-21 20:27:01 +08001636 NULL, size, flags, false, &local_err);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001637 if (local_err) {
1638 error_propagate(errp, local_err);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001639 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001640 }
1641 }
1642
1643 options = qdict_new();
Peter Maydelld52e1a02018-11-01 16:30:37 +00001644 if (snapshot_node_name) {
Eric Blake46f5ac22017-04-27 16:58:17 -05001645 qdict_put_str(options, "node-name", snapshot_node_name);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001646 }
Eric Blake46f5ac22017-04-27 16:58:17 -05001647 qdict_put_str(options, "driver", format);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001648 }
1649
Max Reitz5b363932016-05-17 16:41:31 +02001650 state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags,
1651 errp);
Max Reitzf67503e2014-02-18 18:33:05 +01001652 /* We will manually add the backing_hd field to the bs later */
Max Reitz5b363932016-05-17 16:41:31 +02001653 if (!state->new_bs) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001654 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001655 }
1656
Kevin Wolf1f0c4612016-03-22 18:38:44 +01001657 if (bdrv_has_blk(state->new_bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02001658 error_setg(errp, "The snapshot is already in use");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001659 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001660 }
1661
1662 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1663 errp)) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001664 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001665 }
1666
1667 if (state->new_bs->backing != NULL) {
1668 error_setg(errp, "The snapshot already has a backing image");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001669 goto out;
Alberto Garcia08b24cf2015-11-03 12:32:35 +02001670 }
1671
1672 if (!state->new_bs->drv->supports_backing) {
1673 error_setg(errp, "The snapshot does not support backing images");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001674 goto out;
Kevin Wolfb2c28322017-02-20 12:46:42 +01001675 }
1676
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001677 bdrv_set_aio_context(state->new_bs, aio_context);
Fam Zhengc26a5ab2017-04-07 14:54:09 +08001678
Kevin Wolfb2c28322017-02-20 12:46:42 +01001679 /* This removes our old bs and adds the new bs. This is an operation that
1680 * can fail, so we need to do it in .prepare; undoing it for abort is
1681 * always possible. */
1682 bdrv_ref(state->new_bs);
1683 bdrv_append(state->new_bs, state->old_bs, &local_err);
1684 if (local_err) {
1685 error_propagate(errp, local_err);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001686 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001687 }
Kevin Wolf067acf22017-03-02 15:26:18 +01001688 state->overlay_appended = true;
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001689
1690out:
1691 aio_context_release(aio_context);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001692}
1693
John Snow50f43f02015-11-05 18:13:09 -05001694static void external_snapshot_commit(BlkActionState *common)
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001695{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001696 ExternalSnapshotState *state =
1697 DO_UPCAST(ExternalSnapshotState, common, common);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001698 AioContext *aio_context;
1699
1700 aio_context = bdrv_get_aio_context(state->old_bs);
1701 aio_context_acquire(aio_context);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001702
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001703 /* We don't need (or want) to use the transactional
1704 * bdrv_reopen_multiple() across all the entries at once, because we
1705 * don't want to abort all of them if one of them fails the reopen */
Paolo Bonzinid3faa132017-06-05 14:38:50 +02001706 if (!atomic_read(&state->old_bs->copy_on_read)) {
Alberto Garcia1b577742018-11-12 16:00:39 +02001707 bdrv_reopen_set_read_only(state->old_bs, true, NULL);
Kevin Wolf4c844982016-02-29 13:12:26 +01001708 }
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001709
1710 aio_context_release(aio_context);
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001711}
1712
John Snow50f43f02015-11-05 18:13:09 -05001713static void external_snapshot_abort(BlkActionState *common)
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001714{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001715 ExternalSnapshotState *state =
1716 DO_UPCAST(ExternalSnapshotState, common, common);
1717 if (state->new_bs) {
Kevin Wolf067acf22017-03-02 15:26:18 +01001718 if (state->overlay_appended) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001719 AioContext *aio_context;
1720
1721 aio_context = bdrv_get_aio_context(state->old_bs);
1722 aio_context_acquire(aio_context);
1723
Jeff Cody719fc282017-06-07 09:55:22 -04001724 bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd()
1725 close state->old_bs; we need it */
1726 bdrv_set_backing_hd(state->new_bs, NULL, &error_abort);
Kevin Wolf5fe31c22017-03-06 16:20:51 +01001727 bdrv_replace_node(state->new_bs, state->old_bs, &error_abort);
Jeff Cody719fc282017-06-07 09:55:22 -04001728 bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001729
1730 aio_context_release(aio_context);
Kevin Wolfb2c28322017-02-20 12:46:42 +01001731 }
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001732 }
Fam Zhengda763e82015-10-23 11:08:10 +08001733}
1734
John Snow50f43f02015-11-05 18:13:09 -05001735static void external_snapshot_clean(BlkActionState *common)
Fam Zhengda763e82015-10-23 11:08:10 +08001736{
1737 ExternalSnapshotState *state =
1738 DO_UPCAST(ExternalSnapshotState, common, common);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001739 AioContext *aio_context;
1740
1741 if (!state->old_bs) {
1742 return;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001743 }
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001744
1745 aio_context = bdrv_get_aio_context(state->old_bs);
1746 aio_context_acquire(aio_context);
1747
1748 bdrv_drained_end(state->old_bs);
1749 bdrv_unref(state->new_bs);
1750
1751 aio_context_release(aio_context);
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001752}
1753
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001754typedef struct DriveBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001755 BlkActionState common;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001756 BlockDriverState *bs;
1757 BlockJob *job;
1758} DriveBackupState;
1759
Kevin Wolf62c9e412018-04-19 16:09:52 +02001760static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
Pavel Butsykin81206a82016-07-22 11:17:50 +03001761 Error **errp);
John Snow78f51fd2015-11-05 18:13:17 -05001762
John Snow50f43f02015-11-05 18:13:09 -05001763static void drive_backup_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001764{
1765 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001766 BlockDriverState *bs;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001767 DriveBackup *backup;
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001768 AioContext *aio_context;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001769 Error *local_err = NULL;
1770
Eric Blake6a8f9662015-10-26 16:34:54 -06001771 assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001772 backup = common->action->u.drive_backup.data;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001773
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001774 bs = qmp_get_root_bs(backup->device, errp);
1775 if (!bs) {
Fam Zheng1fdd4b72015-10-23 11:08:11 +08001776 return;
1777 }
1778
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001779 aio_context = bdrv_get_aio_context(bs);
1780 aio_context_acquire(aio_context);
1781
1782 /* Paired with .clean() */
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001783 bdrv_drained_begin(bs);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001784
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001785 state->bs = bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001786
John Snow111049a2016-11-08 01:50:38 -05001787 state->job = do_drive_backup(backup, common->block_job_txn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001788 if (local_err) {
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001789 error_propagate(errp, local_err);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001790 goto out;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001791 }
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001792
1793out:
1794 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05001795}
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001796
John Snow111049a2016-11-08 01:50:38 -05001797static void drive_backup_commit(BlkActionState *common)
1798{
1799 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001800 AioContext *aio_context;
1801
1802 aio_context = bdrv_get_aio_context(state->bs);
1803 aio_context_acquire(aio_context);
1804
John Snow111049a2016-11-08 01:50:38 -05001805 assert(state->job);
Kevin Wolfda01ff72018-04-13 17:31:02 +02001806 job_start(&state->job->job);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001807
1808 aio_context_release(aio_context);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001809}
1810
John Snow50f43f02015-11-05 18:13:09 -05001811static void drive_backup_abort(BlkActionState *common)
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001812{
1813 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001814
John Snow111049a2016-11-08 01:50:38 -05001815 if (state->job) {
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001816 AioContext *aio_context;
1817
1818 aio_context = bdrv_get_aio_context(state->bs);
1819 aio_context_acquire(aio_context);
1820
Kevin Wolf3d70ff52018-04-24 16:13:52 +02001821 job_cancel_sync(&state->job->job);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001822
1823 aio_context_release(aio_context);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001824 }
1825}
1826
John Snow50f43f02015-11-05 18:13:09 -05001827static void drive_backup_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001828{
1829 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001830 AioContext *aio_context;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001831
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001832 if (!state->bs) {
1833 return;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001834 }
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001835
1836 aio_context = bdrv_get_aio_context(state->bs);
1837 aio_context_acquire(aio_context);
1838
1839 bdrv_drained_end(state->bs);
1840
1841 aio_context_release(aio_context);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001842}
1843
Fam Zhengbd8baec2014-12-18 18:37:06 +08001844typedef struct BlockdevBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001845 BlkActionState common;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001846 BlockDriverState *bs;
1847 BlockJob *job;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001848} BlockdevBackupState;
1849
Kevin Wolf62c9e412018-04-19 16:09:52 +02001850static BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
John Snow111049a2016-11-08 01:50:38 -05001851 Error **errp);
John Snow78f51fd2015-11-05 18:13:17 -05001852
John Snow50f43f02015-11-05 18:13:09 -05001853static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001854{
1855 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1856 BlockdevBackup *backup;
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001857 BlockDriverState *bs, *target;
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001858 AioContext *aio_context;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001859 Error *local_err = NULL;
1860
Eric Blake6a8f9662015-10-26 16:34:54 -06001861 assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001862 backup = common->action->u.blockdev_backup.data;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001863
Vladimir Sementsov-Ogievskiy930fe172018-07-02 15:46:29 -04001864 bs = bdrv_lookup_bs(backup->device, backup->device, errp);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001865 if (!bs) {
Fam Zhengff52bf32015-10-23 11:08:12 +08001866 return;
1867 }
1868
Kevin Wolf39d990a2016-08-02 19:22:04 +02001869 target = bdrv_lookup_bs(backup->target, backup->target, errp);
Max Reitz5433c242015-10-19 17:53:29 +02001870 if (!target) {
Fam Zhengbd8baec2014-12-18 18:37:06 +08001871 return;
1872 }
1873
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001874 aio_context = bdrv_get_aio_context(bs);
1875 if (aio_context != bdrv_get_aio_context(target)) {
Fam Zhengbd8baec2014-12-18 18:37:06 +08001876 error_setg(errp, "Backup between two IO threads is not implemented");
1877 return;
1878 }
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001879 aio_context_acquire(aio_context);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001880 state->bs = bs;
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001881
1882 /* Paired with .clean() */
Fam Zhengff52bf32015-10-23 11:08:12 +08001883 bdrv_drained_begin(state->bs);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001884
John Snow111049a2016-11-08 01:50:38 -05001885 state->job = do_blockdev_backup(backup, common->block_job_txn, &local_err);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001886 if (local_err) {
1887 error_propagate(errp, local_err);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001888 goto out;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001889 }
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001890
1891out:
1892 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05001893}
Fam Zhengbd8baec2014-12-18 18:37:06 +08001894
John Snow111049a2016-11-08 01:50:38 -05001895static void blockdev_backup_commit(BlkActionState *common)
1896{
1897 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001898 AioContext *aio_context;
1899
1900 aio_context = bdrv_get_aio_context(state->bs);
1901 aio_context_acquire(aio_context);
1902
John Snow111049a2016-11-08 01:50:38 -05001903 assert(state->job);
Kevin Wolfda01ff72018-04-13 17:31:02 +02001904 job_start(&state->job->job);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001905
1906 aio_context_release(aio_context);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001907}
1908
John Snow50f43f02015-11-05 18:13:09 -05001909static void blockdev_backup_abort(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001910{
1911 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001912
John Snow111049a2016-11-08 01:50:38 -05001913 if (state->job) {
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001914 AioContext *aio_context;
1915
1916 aio_context = bdrv_get_aio_context(state->bs);
1917 aio_context_acquire(aio_context);
1918
Kevin Wolf3d70ff52018-04-24 16:13:52 +02001919 job_cancel_sync(&state->job->job);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001920
1921 aio_context_release(aio_context);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001922 }
1923}
1924
John Snow50f43f02015-11-05 18:13:09 -05001925static void blockdev_backup_clean(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001926{
1927 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001928 AioContext *aio_context;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001929
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001930 if (!state->bs) {
1931 return;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001932 }
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001933
1934 aio_context = bdrv_get_aio_context(state->bs);
1935 aio_context_acquire(aio_context);
1936
1937 bdrv_drained_end(state->bs);
1938
1939 aio_context_release(aio_context);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001940}
1941
Fam Zhengdf9a6812015-11-09 18:16:54 +08001942typedef struct BlockDirtyBitmapState {
John Snow50f43f02015-11-05 18:13:09 -05001943 BlkActionState common;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001944 BdrvDirtyBitmap *bitmap;
1945 BlockDriverState *bs;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001946 HBitmap *backup;
1947 bool prepared;
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04001948 bool was_enabled;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001949} BlockDirtyBitmapState;
1950
John Snow50f43f02015-11-05 18:13:09 -05001951static void block_dirty_bitmap_add_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08001952 Error **errp)
1953{
1954 Error *local_err = NULL;
1955 BlockDirtyBitmapAdd *action;
1956 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1957 common, common);
1958
John Snow94d16a62015-11-05 18:13:18 -05001959 if (action_check_completion_mode(common, errp) < 0) {
1960 return;
1961 }
1962
Eric Blake32bafa82016-03-17 16:48:37 -06001963 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001964 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
1965 qmp_block_dirty_bitmap_add(action->node, action->name,
1966 action->has_granularity, action->granularity,
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03001967 action->has_persistent, action->persistent,
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03001968 action->has_autoload, action->autoload,
John Snow0e2b7f02018-12-21 04:35:22 -05001969 action->has_disabled, action->disabled,
Fam Zhengdf9a6812015-11-09 18:16:54 +08001970 &local_err);
1971
1972 if (!local_err) {
1973 state->prepared = true;
1974 } else {
1975 error_propagate(errp, local_err);
1976 }
1977}
1978
John Snow50f43f02015-11-05 18:13:09 -05001979static void block_dirty_bitmap_add_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08001980{
1981 BlockDirtyBitmapAdd *action;
1982 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1983 common, common);
1984
Eric Blake32bafa82016-03-17 16:48:37 -06001985 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001986 /* Should not be able to fail: IF the bitmap was added via .prepare(),
1987 * then the node reference and bitmap name must have been valid.
1988 */
1989 if (state->prepared) {
1990 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
1991 }
1992}
1993
John Snow50f43f02015-11-05 18:13:09 -05001994static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08001995 Error **errp)
1996{
1997 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1998 common, common);
1999 BlockDirtyBitmap *action;
2000
John Snow94d16a62015-11-05 18:13:18 -05002001 if (action_check_completion_mode(common, errp) < 0) {
2002 return;
2003 }
2004
Eric Blake32bafa82016-03-17 16:48:37 -06002005 action = common->action->u.block_dirty_bitmap_clear.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002006 state->bitmap = block_dirty_bitmap_lookup(action->node,
2007 action->name,
2008 &state->bs,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002009 errp);
2010 if (!state->bitmap) {
2011 return;
2012 }
2013
John Snow993edc02018-10-29 16:23:16 -04002014 if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
2015 error_setg(errp, "Cannot modify a bitmap in use by another operation");
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04002016 return;
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002017 } else if (bdrv_dirty_bitmap_readonly(state->bitmap)) {
2018 error_setg(errp, "Cannot clear a readonly bitmap");
2019 return;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002020 }
2021
2022 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
Fam Zhengdf9a6812015-11-09 18:16:54 +08002023}
2024
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002025static void block_dirty_bitmap_restore(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002026{
2027 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2028 common, common);
2029
John Snow184dd9c2017-03-15 17:28:11 -04002030 if (state->backup) {
Vladimir Sementsov-Ogievskiy56bd6622018-10-29 16:23:14 -04002031 bdrv_restore_dirty_bitmap(state->bitmap, state->backup);
John Snow184dd9c2017-03-15 17:28:11 -04002032 }
Fam Zhengdf9a6812015-11-09 18:16:54 +08002033}
2034
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002035static void block_dirty_bitmap_free_backup(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002036{
2037 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2038 common, common);
2039
2040 hbitmap_free(state->backup);
2041}
2042
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002043static void block_dirty_bitmap_enable_prepare(BlkActionState *common,
2044 Error **errp)
2045{
2046 BlockDirtyBitmap *action;
2047 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2048 common, common);
2049
2050 if (action_check_completion_mode(common, errp) < 0) {
2051 return;
2052 }
2053
John Snow0e2b7f02018-12-21 04:35:22 -05002054 action = common->action->u.block_dirty_bitmap_enable.data;
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002055 state->bitmap = block_dirty_bitmap_lookup(action->node,
2056 action->name,
2057 NULL,
2058 errp);
2059 if (!state->bitmap) {
2060 return;
2061 }
2062
John Snowb053bb52018-10-29 16:23:16 -04002063 if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
2064 error_setg(errp,
2065 "Bitmap '%s' is currently in use by another operation"
2066 " and cannot be enabled", action->name);
2067 return;
2068 }
2069
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002070 state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
2071 bdrv_enable_dirty_bitmap(state->bitmap);
2072}
2073
2074static void block_dirty_bitmap_enable_abort(BlkActionState *common)
2075{
2076 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2077 common, common);
2078
2079 if (!state->was_enabled) {
2080 bdrv_disable_dirty_bitmap(state->bitmap);
2081 }
2082}
2083
2084static void block_dirty_bitmap_disable_prepare(BlkActionState *common,
2085 Error **errp)
2086{
2087 BlockDirtyBitmap *action;
2088 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2089 common, common);
2090
2091 if (action_check_completion_mode(common, errp) < 0) {
2092 return;
2093 }
2094
John Snow0e2b7f02018-12-21 04:35:22 -05002095 action = common->action->u.block_dirty_bitmap_disable.data;
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002096 state->bitmap = block_dirty_bitmap_lookup(action->node,
2097 action->name,
2098 NULL,
2099 errp);
2100 if (!state->bitmap) {
2101 return;
2102 }
2103
John Snowb053bb52018-10-29 16:23:16 -04002104 if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
2105 error_setg(errp,
2106 "Bitmap '%s' is currently in use by another operation"
2107 " and cannot be disabled", action->name);
2108 return;
2109 }
2110
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002111 state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
2112 bdrv_disable_dirty_bitmap(state->bitmap);
2113}
2114
2115static void block_dirty_bitmap_disable_abort(BlkActionState *common)
2116{
2117 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2118 common, common);
2119
2120 if (state->was_enabled) {
2121 bdrv_enable_dirty_bitmap(state->bitmap);
2122 }
2123}
2124
John Snow360d4e42018-12-21 04:35:21 -05002125static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node,
2126 const char *target,
2127 strList *bitmaps,
2128 HBitmap **backup,
2129 Error **errp);
2130
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002131static void block_dirty_bitmap_merge_prepare(BlkActionState *common,
2132 Error **errp)
2133{
2134 BlockDirtyBitmapMerge *action;
2135 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2136 common, common);
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002137
2138 if (action_check_completion_mode(common, errp) < 0) {
2139 return;
2140 }
2141
John Snow0e2b7f02018-12-21 04:35:22 -05002142 action = common->action->u.block_dirty_bitmap_merge.data;
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002143
John Snow360d4e42018-12-21 04:35:21 -05002144 state->bitmap = do_block_dirty_bitmap_merge(action->node, action->target,
2145 action->bitmaps, &state->backup,
2146 errp);
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002147}
2148
John Snow50f43f02015-11-05 18:13:09 -05002149static void abort_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002150{
2151 error_setg(errp, "Transaction aborted using Abort action");
2152}
2153
John Snow50f43f02015-11-05 18:13:09 -05002154static void abort_commit(BlkActionState *common)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002155{
Stefan Weildfc6f862013-07-25 18:21:28 +02002156 g_assert_not_reached(); /* this action never succeeds */
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002157}
2158
John Snow50f43f02015-11-05 18:13:09 -05002159static const BlkActionOps actions[] = {
Alberto Garcia43de7e22015-10-26 14:27:16 +02002160 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2161 .instance_size = sizeof(ExternalSnapshotState),
2162 .prepare = external_snapshot_prepare,
2163 .commit = external_snapshot_commit,
2164 .abort = external_snapshot_abort,
Alberto Garcia4ad6f3d2015-11-13 15:00:24 +02002165 .clean = external_snapshot_clean,
Alberto Garcia43de7e22015-10-26 14:27:16 +02002166 },
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002167 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002168 .instance_size = sizeof(ExternalSnapshotState),
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002169 .prepare = external_snapshot_prepare,
2170 .commit = external_snapshot_commit,
2171 .abort = external_snapshot_abort,
Fam Zhengda763e82015-10-23 11:08:10 +08002172 .clean = external_snapshot_clean,
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002173 },
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002174 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2175 .instance_size = sizeof(DriveBackupState),
2176 .prepare = drive_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002177 .commit = drive_backup_commit,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002178 .abort = drive_backup_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002179 .clean = drive_backup_clean,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002180 },
Fam Zhengbd8baec2014-12-18 18:37:06 +08002181 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2182 .instance_size = sizeof(BlockdevBackupState),
2183 .prepare = blockdev_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002184 .commit = blockdev_backup_commit,
Fam Zhengbd8baec2014-12-18 18:37:06 +08002185 .abort = blockdev_backup_abort,
2186 .clean = blockdev_backup_clean,
2187 },
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002188 [TRANSACTION_ACTION_KIND_ABORT] = {
John Snow50f43f02015-11-05 18:13:09 -05002189 .instance_size = sizeof(BlkActionState),
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002190 .prepare = abort_prepare,
2191 .commit = abort_commit,
2192 },
Wenchao Xiabbe86012013-09-11 14:04:34 +08002193 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2194 .instance_size = sizeof(InternalSnapshotState),
2195 .prepare = internal_snapshot_prepare,
2196 .abort = internal_snapshot_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002197 .clean = internal_snapshot_clean,
Wenchao Xiabbe86012013-09-11 14:04:34 +08002198 },
Fam Zhengdf9a6812015-11-09 18:16:54 +08002199 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2200 .instance_size = sizeof(BlockDirtyBitmapState),
2201 .prepare = block_dirty_bitmap_add_prepare,
2202 .abort = block_dirty_bitmap_add_abort,
2203 },
2204 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2205 .instance_size = sizeof(BlockDirtyBitmapState),
2206 .prepare = block_dirty_bitmap_clear_prepare,
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002207 .commit = block_dirty_bitmap_free_backup,
2208 .abort = block_dirty_bitmap_restore,
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002209 },
John Snow0e2b7f02018-12-21 04:35:22 -05002210 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = {
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002211 .instance_size = sizeof(BlockDirtyBitmapState),
2212 .prepare = block_dirty_bitmap_enable_prepare,
2213 .abort = block_dirty_bitmap_enable_abort,
2214 },
John Snow0e2b7f02018-12-21 04:35:22 -05002215 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = {
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002216 .instance_size = sizeof(BlockDirtyBitmapState),
2217 .prepare = block_dirty_bitmap_disable_prepare,
2218 .abort = block_dirty_bitmap_disable_abort,
John Snow66da04d2018-09-06 09:02:25 -04002219 },
John Snow0e2b7f02018-12-21 04:35:22 -05002220 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = {
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002221 .instance_size = sizeof(BlockDirtyBitmapState),
2222 .prepare = block_dirty_bitmap_merge_prepare,
2223 .commit = block_dirty_bitmap_free_backup,
2224 .abort = block_dirty_bitmap_restore,
2225 },
John Snow66da04d2018-09-06 09:02:25 -04002226 /* Where are transactions for MIRROR, COMMIT and STREAM?
2227 * Although these blockjobs use transaction callbacks like the backup job,
2228 * these jobs do not necessarily adhere to transaction semantics.
2229 * These jobs may not fully undo all of their actions on abort, nor do they
2230 * necessarily work in transactions with more than one job in them.
2231 */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002232};
2233
John Snow94d16a62015-11-05 18:13:18 -05002234/**
2235 * Allocate a TransactionProperties structure if necessary, and fill
2236 * that structure with desired defaults if they are unset.
2237 */
2238static TransactionProperties *get_transaction_properties(
2239 TransactionProperties *props)
2240{
2241 if (!props) {
2242 props = g_new0(TransactionProperties, 1);
2243 }
2244
2245 if (!props->has_completion_mode) {
2246 props->has_completion_mode = true;
2247 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2248 }
2249
2250 return props;
2251}
2252
Jeff Cody8802d1f2012-02-28 15:54:06 -05002253/*
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002254 * 'Atomic' group operations. The operations are performed as a set, and if
2255 * any fail then we roll back all operations in the group.
Jeff Cody8802d1f2012-02-28 15:54:06 -05002256 */
John Snow94d16a62015-11-05 18:13:18 -05002257void qmp_transaction(TransactionActionList *dev_list,
2258 bool has_props,
2259 struct TransactionProperties *props,
2260 Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -05002261{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002262 TransactionActionList *dev_entry = dev_list;
Kevin Wolf62c9e412018-04-19 16:09:52 +02002263 JobTxn *block_job_txn = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002264 BlkActionState *state, *next;
Luiz Capitulino43e17042012-11-30 10:52:07 -02002265 Error *local_err = NULL;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002266
John Snowf4de0f82019-01-11 11:59:16 -06002267 QTAILQ_HEAD(, BlkActionState) snap_bdrv_states;
2268 QTAILQ_INIT(&snap_bdrv_states);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002269
John Snow94d16a62015-11-05 18:13:18 -05002270 /* Does this transaction get canceled as a group on failure?
Kevin Wolf62c9e412018-04-19 16:09:52 +02002271 * If not, we don't really need to make a JobTxn.
John Snow94d16a62015-11-05 18:13:18 -05002272 */
2273 props = get_transaction_properties(props);
2274 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02002275 block_job_txn = job_txn_new();
John Snow94d16a62015-11-05 18:13:18 -05002276 }
2277
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002278 /* drain all i/o before any operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002279 bdrv_drain_all();
2280
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002281 /* We don't do anything in this loop that commits us to the operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002282 while (NULL != dev_entry) {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002283 TransactionAction *dev_info = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002284 const BlkActionOps *ops;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002285
Jeff Cody8802d1f2012-02-28 15:54:06 -05002286 dev_info = dev_entry->value;
2287 dev_entry = dev_entry->next;
2288
Eric Blake6a8f9662015-10-26 16:34:54 -06002289 assert(dev_info->type < ARRAY_SIZE(actions));
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002290
Eric Blake6a8f9662015-10-26 16:34:54 -06002291 ops = &actions[dev_info->type];
Max Reitzaa3fe712013-09-12 14:57:27 +02002292 assert(ops->instance_size > 0);
2293
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002294 state = g_malloc0(ops->instance_size);
2295 state->ops = ops;
2296 state->action = dev_info;
John Snow94d16a62015-11-05 18:13:18 -05002297 state->block_job_txn = block_job_txn;
2298 state->txn_props = props;
John Snowf4de0f82019-01-11 11:59:16 -06002299 QTAILQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002300
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002301 state->ops->prepare(state, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002302 if (local_err) {
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002303 error_propagate(errp, local_err);
2304 goto delete_and_fail;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002305 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002306 }
2307
John Snowf4de0f82019-01-11 11:59:16 -06002308 QTAILQ_FOREACH(state, &snap_bdrv_states, entry) {
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02002309 if (state->ops->commit) {
2310 state->ops->commit(state);
2311 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002312 }
2313
2314 /* success */
2315 goto exit;
2316
2317delete_and_fail:
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002318 /* failure, and it is all-or-none; roll back all operations */
John Snowf4de0f82019-01-11 11:59:16 -06002319 QTAILQ_FOREACH_REVERSE(state, &snap_bdrv_states, entry) {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002320 if (state->ops->abort) {
2321 state->ops->abort(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002322 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002323 }
2324exit:
John Snowf4de0f82019-01-11 11:59:16 -06002325 QTAILQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002326 if (state->ops->clean) {
2327 state->ops->clean(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002328 }
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002329 g_free(state);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002330 }
John Snow94d16a62015-11-05 18:13:18 -05002331 if (!has_props) {
2332 qapi_free_TransactionProperties(props);
2333 }
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02002334 job_txn_unref(block_job_txn);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002335}
2336
Kevin Wolffbe2d812016-09-20 13:38:46 +02002337void qmp_eject(bool has_device, const char *device,
2338 bool has_id, const char *id,
2339 bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002340{
Max Reitz38f54bd2015-10-26 21:39:12 +01002341 Error *local_err = NULL;
John Snow3a3086b2016-05-18 17:53:40 -04002342 int rc;
Markus Armbruster666daa62010-06-02 18:48:27 +02002343
John Snow3a3086b2016-05-18 17:53:40 -04002344 if (!has_force) {
2345 force = false;
2346 }
2347
Kevin Wolffbe2d812016-09-20 13:38:46 +02002348 rc = do_open_tray(has_device ? device : NULL,
2349 has_id ? id : NULL,
2350 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002351 if (rc && rc != -ENOSYS) {
Max Reitz38f54bd2015-10-26 21:39:12 +01002352 error_propagate(errp, local_err);
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02002353 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002354 }
Colin Lordbf18bee2016-06-06 14:15:22 -04002355 error_free(local_err);
John Snow3a3086b2016-05-18 17:53:40 -04002356
Max Reitz82fcf662017-11-10 23:43:01 +01002357 blockdev_remove_medium(has_device, device, has_id, id, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02002358}
2359
Benoît Canet12d3ba82014-01-23 21:31:35 +01002360void qmp_block_passwd(bool has_device, const char *device,
2361 bool has_node_name, const char *node_name,
2362 const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002363{
Daniel P. Berrangec01c2142017-06-23 17:24:16 +01002364 error_setg(errp,
2365 "Setting block passwords directly is no longer supported");
Markus Armbruster666daa62010-06-02 18:48:27 +02002366}
2367
Colin Lordbf18bee2016-06-06 14:15:22 -04002368/*
2369 * Attempt to open the tray of @device.
2370 * If @force, ignore its tray lock.
2371 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2372 * On error, store an error through @errp and return -errno.
2373 * If @device does not exist, return -ENODEV.
2374 * If it has no removable media, return -ENOTSUP.
2375 * If it has no tray, return -ENOSYS.
2376 * If the guest was asked to open the tray, return -EINPROGRESS.
2377 * Else, return 0.
John Snow3a3086b2016-05-18 17:53:40 -04002378 */
Kevin Wolfb33945c2016-09-20 13:38:43 +02002379static int do_open_tray(const char *blk_name, const char *qdev_id,
2380 bool force, Error **errp)
Max Reitz7d8a9f72015-10-26 21:39:08 +01002381{
2382 BlockBackend *blk;
Kevin Wolfb33945c2016-09-20 13:38:43 +02002383 const char *device = qdev_id ?: blk_name;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002384 bool locked;
2385
Kevin Wolfb33945c2016-09-20 13:38:43 +02002386 blk = qmp_get_blk(blk_name, qdev_id, errp);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002387 if (!blk) {
John Snow3a3086b2016-05-18 17:53:40 -04002388 return -ENODEV;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002389 }
2390
2391 if (!blk_dev_has_removable_media(blk)) {
2392 error_setg(errp, "Device '%s' is not removable", device);
John Snow3a3086b2016-05-18 17:53:40 -04002393 return -ENOTSUP;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002394 }
2395
Max Reitz12c7ec82016-01-29 20:49:11 +01002396 if (!blk_dev_has_tray(blk)) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002397 error_setg(errp, "Device '%s' does not have a tray", device);
2398 return -ENOSYS;
Max Reitz12c7ec82016-01-29 20:49:11 +01002399 }
2400
Max Reitz7d8a9f72015-10-26 21:39:08 +01002401 if (blk_dev_is_tray_open(blk)) {
John Snow3a3086b2016-05-18 17:53:40 -04002402 return 0;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002403 }
2404
2405 locked = blk_dev_is_medium_locked(blk);
2406 if (locked) {
2407 blk_dev_eject_request(blk, force);
2408 }
2409
2410 if (!locked || force) {
Kevin Wolf39829a02017-01-24 14:21:41 +01002411 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002412 }
John Snow3a3086b2016-05-18 17:53:40 -04002413
2414 if (locked && !force) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002415 error_setg(errp, "Device '%s' is locked and force was not specified, "
2416 "wait for tray to open and try again", device);
2417 return -EINPROGRESS;
John Snow3a3086b2016-05-18 17:53:40 -04002418 }
2419
2420 return 0;
2421}
2422
Kevin Wolfb33945c2016-09-20 13:38:43 +02002423void qmp_blockdev_open_tray(bool has_device, const char *device,
2424 bool has_id, const char *id,
2425 bool has_force, bool force,
John Snow3a3086b2016-05-18 17:53:40 -04002426 Error **errp)
2427{
Colin Lordbf18bee2016-06-06 14:15:22 -04002428 Error *local_err = NULL;
2429 int rc;
2430
John Snow3a3086b2016-05-18 17:53:40 -04002431 if (!has_force) {
2432 force = false;
2433 }
Kevin Wolfb33945c2016-09-20 13:38:43 +02002434 rc = do_open_tray(has_device ? device : NULL,
2435 has_id ? id : NULL,
2436 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002437 if (rc && rc != -ENOSYS && rc != -EINPROGRESS) {
2438 error_propagate(errp, local_err);
2439 return;
2440 }
2441 error_free(local_err);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002442}
2443
Kevin Wolfb33945c2016-09-20 13:38:43 +02002444void qmp_blockdev_close_tray(bool has_device, const char *device,
2445 bool has_id, const char *id,
2446 Error **errp)
Max Reitzabaaf592015-10-26 21:39:09 +01002447{
2448 BlockBackend *blk;
Kevin Wolf39829a02017-01-24 14:21:41 +01002449 Error *local_err = NULL;
Max Reitzabaaf592015-10-26 21:39:09 +01002450
Kevin Wolfb33945c2016-09-20 13:38:43 +02002451 device = has_device ? device : NULL;
2452 id = has_id ? id : NULL;
2453
2454 blk = qmp_get_blk(device, id, errp);
Max Reitzabaaf592015-10-26 21:39:09 +01002455 if (!blk) {
Max Reitzabaaf592015-10-26 21:39:09 +01002456 return;
2457 }
2458
2459 if (!blk_dev_has_removable_media(blk)) {
Kevin Wolfb33945c2016-09-20 13:38:43 +02002460 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitzabaaf592015-10-26 21:39:09 +01002461 return;
2462 }
2463
Max Reitz12c7ec82016-01-29 20:49:11 +01002464 if (!blk_dev_has_tray(blk)) {
2465 /* Ignore this command on tray-less devices */
2466 return;
2467 }
2468
Max Reitzabaaf592015-10-26 21:39:09 +01002469 if (!blk_dev_is_tray_open(blk)) {
2470 return;
2471 }
2472
Kevin Wolf39829a02017-01-24 14:21:41 +01002473 blk_dev_change_media_cb(blk, true, &local_err);
2474 if (local_err) {
2475 error_propagate(errp, local_err);
2476 return;
2477 }
Max Reitzabaaf592015-10-26 21:39:09 +01002478}
2479
Max Reitz82fcf662017-11-10 23:43:01 +01002480static void blockdev_remove_medium(bool has_device, const char *device,
2481 bool has_id, const char *id, Error **errp)
Max Reitz2814f672015-10-26 21:39:10 +01002482{
2483 BlockBackend *blk;
2484 BlockDriverState *bs;
2485 AioContext *aio_context;
Kevin Wolf00949ba2016-09-20 13:38:45 +02002486 bool has_attached_device;
Max Reitz2814f672015-10-26 21:39:10 +01002487
Kevin Wolf00949ba2016-09-20 13:38:45 +02002488 device = has_device ? device : NULL;
2489 id = has_id ? id : NULL;
2490
2491 blk = qmp_get_blk(device, id, errp);
Max Reitz2814f672015-10-26 21:39:10 +01002492 if (!blk) {
Max Reitz2814f672015-10-26 21:39:10 +01002493 return;
2494 }
2495
2496 /* For BBs without a device, we can exchange the BDS tree at will */
Kevin Wolf00949ba2016-09-20 13:38:45 +02002497 has_attached_device = blk_get_attached_dev(blk);
Max Reitz2814f672015-10-26 21:39:10 +01002498
Kevin Wolf00949ba2016-09-20 13:38:45 +02002499 if (has_attached_device && !blk_dev_has_removable_media(blk)) {
2500 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002501 return;
2502 }
2503
Kevin Wolf00949ba2016-09-20 13:38:45 +02002504 if (has_attached_device && blk_dev_has_tray(blk) &&
2505 !blk_dev_is_tray_open(blk))
2506 {
2507 error_setg(errp, "Tray of device '%s' is not open", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002508 return;
2509 }
2510
2511 bs = blk_bs(blk);
2512 if (!bs) {
2513 return;
2514 }
2515
2516 aio_context = bdrv_get_aio_context(bs);
2517 aio_context_acquire(aio_context);
2518
2519 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2520 goto out;
2521 }
2522
Max Reitz2814f672015-10-26 21:39:10 +01002523 blk_remove_bs(blk);
2524
Max Reitz12c7ec82016-01-29 20:49:11 +01002525 if (!blk_dev_has_tray(blk)) {
2526 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2527 * called at all); therefore, the medium needs to be ejected here.
2528 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2529 * value passed here (i.e. false). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002530 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz12c7ec82016-01-29 20:49:11 +01002531 }
2532
Max Reitz2814f672015-10-26 21:39:10 +01002533out:
2534 aio_context_release(aio_context);
2535}
2536
Max Reitz34ce1112017-11-10 23:43:02 +01002537void qmp_blockdev_remove_medium(const char *id, Error **errp)
Max Reitz82fcf662017-11-10 23:43:01 +01002538{
2539 blockdev_remove_medium(false, NULL, true, id, errp);
2540}
2541
Kevin Wolf716df212016-09-20 13:38:44 +02002542static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
Max Reitzd1299882015-10-26 21:39:11 +01002543 BlockDriverState *bs, Error **errp)
2544{
Kevin Wolf39829a02017-01-24 14:21:41 +01002545 Error *local_err = NULL;
Max Reitzd1299882015-10-26 21:39:11 +01002546 bool has_device;
Kevin Wolfd7086422017-01-13 19:02:32 +01002547 int ret;
Max Reitzd1299882015-10-26 21:39:11 +01002548
Max Reitzd1299882015-10-26 21:39:11 +01002549 /* For BBs without a device, we can exchange the BDS tree at will */
2550 has_device = blk_get_attached_dev(blk);
2551
2552 if (has_device && !blk_dev_has_removable_media(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002553 error_setg(errp, "Device is not removable");
Max Reitzd1299882015-10-26 21:39:11 +01002554 return;
2555 }
2556
Max Reitz12c7ec82016-01-29 20:49:11 +01002557 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002558 error_setg(errp, "Tray of the device is not open");
Max Reitzd1299882015-10-26 21:39:11 +01002559 return;
2560 }
2561
2562 if (blk_bs(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002563 error_setg(errp, "There already is a medium in the device");
Max Reitzd1299882015-10-26 21:39:11 +01002564 return;
2565 }
2566
Kevin Wolfd7086422017-01-13 19:02:32 +01002567 ret = blk_insert_bs(blk, bs, errp);
2568 if (ret < 0) {
2569 return;
2570 }
Max Reitzd1299882015-10-26 21:39:11 +01002571
Max Reitz12c7ec82016-01-29 20:49:11 +01002572 if (!blk_dev_has_tray(blk)) {
2573 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2574 * called at all); therefore, the medium needs to be pushed into the
2575 * slot here.
2576 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2577 * value passed here (i.e. true). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002578 blk_dev_change_media_cb(blk, true, &local_err);
2579 if (local_err) {
2580 error_propagate(errp, local_err);
2581 blk_remove_bs(blk);
2582 return;
2583 }
Max Reitz12c7ec82016-01-29 20:49:11 +01002584 }
Max Reitzd1299882015-10-26 21:39:11 +01002585}
2586
Max Reitz82fcf662017-11-10 23:43:01 +01002587static void blockdev_insert_medium(bool has_device, const char *device,
2588 bool has_id, const char *id,
2589 const char *node_name, Error **errp)
Max Reitzd1299882015-10-26 21:39:11 +01002590{
Kevin Wolf716df212016-09-20 13:38:44 +02002591 BlockBackend *blk;
Max Reitzd1299882015-10-26 21:39:11 +01002592 BlockDriverState *bs;
2593
Kevin Wolf716df212016-09-20 13:38:44 +02002594 blk = qmp_get_blk(has_device ? device : NULL,
2595 has_id ? id : NULL,
2596 errp);
2597 if (!blk) {
2598 return;
2599 }
2600
Max Reitzd1299882015-10-26 21:39:11 +01002601 bs = bdrv_find_node(node_name);
2602 if (!bs) {
2603 error_setg(errp, "Node '%s' not found", node_name);
2604 return;
2605 }
2606
Kevin Wolf1f0c4612016-03-22 18:38:44 +01002607 if (bdrv_has_blk(bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02002608 error_setg(errp, "Node '%s' is already in use", node_name);
Max Reitzd1299882015-10-26 21:39:11 +01002609 return;
2610 }
2611
Kevin Wolf716df212016-09-20 13:38:44 +02002612 qmp_blockdev_insert_anon_medium(blk, bs, errp);
Max Reitzd1299882015-10-26 21:39:11 +01002613}
2614
Max Reitz34ce1112017-11-10 23:43:02 +01002615void qmp_blockdev_insert_medium(const char *id, const char *node_name,
2616 Error **errp)
Max Reitz82fcf662017-11-10 23:43:01 +01002617{
2618 blockdev_insert_medium(false, NULL, true, id, node_name, errp);
2619}
2620
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002621void qmp_blockdev_change_medium(bool has_device, const char *device,
2622 bool has_id, const char *id,
2623 const char *filename,
Max Reitz24fb4132015-11-06 16:27:06 +01002624 bool has_format, const char *format,
Max Reitz39ff43d2015-11-11 04:49:44 +01002625 bool has_read_only,
2626 BlockdevChangeReadOnlyMode read_only,
Max Reitz24fb4132015-11-06 16:27:06 +01002627 Error **errp)
Max Reitzde2c6c02015-10-26 21:39:13 +01002628{
2629 BlockBackend *blk;
2630 BlockDriverState *medium_bs = NULL;
Max Reitz5b363932016-05-17 16:41:31 +02002631 int bdrv_flags;
Kevin Wolfb85114f2016-09-12 19:08:31 +02002632 bool detect_zeroes;
Colin Lord38a53d52016-06-08 13:56:28 -04002633 int rc;
Max Reitzde2c6c02015-10-26 21:39:13 +01002634 QDict *options = NULL;
2635 Error *err = NULL;
2636
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002637 blk = qmp_get_blk(has_device ? device : NULL,
2638 has_id ? id : NULL,
2639 errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002640 if (!blk) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002641 goto fail;
2642 }
2643
2644 if (blk_bs(blk)) {
2645 blk_update_root_state(blk);
2646 }
2647
2648 bdrv_flags = blk_get_open_flags_from_root_state(blk);
Alyssa Milburn156abc22016-02-06 13:36:18 +00002649 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
Kevin Wolfe35bdc12018-10-05 18:57:40 +02002650 BDRV_O_PROTOCOL | BDRV_O_AUTO_RDONLY);
Max Reitzde2c6c02015-10-26 21:39:13 +01002651
Max Reitz39ff43d2015-11-11 04:49:44 +01002652 if (!has_read_only) {
2653 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2654 }
2655
2656 switch (read_only) {
2657 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2658 break;
2659
2660 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2661 bdrv_flags &= ~BDRV_O_RDWR;
2662 break;
2663
2664 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2665 bdrv_flags |= BDRV_O_RDWR;
2666 break;
2667
2668 default:
2669 abort();
2670 }
2671
Kevin Wolfb85114f2016-09-12 19:08:31 +02002672 options = qdict_new();
2673 detect_zeroes = blk_get_detect_zeroes_from_root_state(blk);
Eric Blake46f5ac22017-04-27 16:58:17 -05002674 qdict_put_str(options, "detect-zeroes", detect_zeroes ? "on" : "off");
Kevin Wolfb85114f2016-09-12 19:08:31 +02002675
Max Reitz24fb4132015-11-06 16:27:06 +01002676 if (has_format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05002677 qdict_put_str(options, "driver", format);
Max Reitzde2c6c02015-10-26 21:39:13 +01002678 }
2679
Max Reitz5b363932016-05-17 16:41:31 +02002680 medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp);
2681 if (!medium_bs) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002682 goto fail;
2683 }
2684
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002685 rc = do_open_tray(has_device ? device : NULL,
2686 has_id ? id : NULL,
2687 false, &err);
Colin Lord38a53d52016-06-08 13:56:28 -04002688 if (rc && rc != -ENOSYS) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002689 error_propagate(errp, err);
2690 goto fail;
2691 }
Colin Lord38a53d52016-06-08 13:56:28 -04002692 error_free(err);
2693 err = NULL;
Max Reitzde2c6c02015-10-26 21:39:13 +01002694
Max Reitz82fcf662017-11-10 23:43:01 +01002695 blockdev_remove_medium(has_device, device, has_id, id, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002696 if (err) {
2697 error_propagate(errp, err);
2698 goto fail;
2699 }
2700
Kevin Wolf716df212016-09-20 13:38:44 +02002701 qmp_blockdev_insert_anon_medium(blk, medium_bs, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002702 if (err) {
2703 error_propagate(errp, err);
2704 goto fail;
2705 }
2706
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002707 qmp_blockdev_close_tray(has_device, device, has_id, id, errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002708
2709fail:
2710 /* If the medium has been inserted, the device has its own reference, so
2711 * ours must be relinquished; and if it has not been inserted successfully,
2712 * the reference must be relinquished anyway */
2713 bdrv_unref(medium_bs);
2714}
2715
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002716/* throttling disk I/O limits */
Eric Blake4dc93972016-07-13 21:50:21 -06002717void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002718{
Benoît Canetcc0681c2013-09-02 14:14:39 +02002719 ThrottleConfig cfg;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002720 BlockDriverState *bs;
Fam Zhenga0e85442015-03-02 19:36:48 +08002721 BlockBackend *blk;
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002722 AioContext *aio_context;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002723
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002724 blk = qmp_get_blk(arg->has_device ? arg->device : NULL,
2725 arg->has_id ? arg->id : NULL,
2726 errp);
Fam Zhenga0e85442015-03-02 19:36:48 +08002727 if (!blk) {
Luiz Capitulino80047da2011-12-14 16:49:14 -02002728 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002729 }
Max Reitz5433c242015-10-19 17:53:29 +02002730
2731 aio_context = blk_get_aio_context(blk);
2732 aio_context_acquire(aio_context);
2733
Fam Zhenga0e85442015-03-02 19:36:48 +08002734 bs = blk_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002735 if (!bs) {
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002736 error_setg(errp, "Device has no medium");
Max Reitz5433c242015-10-19 17:53:29 +02002737 goto out;
2738 }
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002739
Alberto Garcia1588ab52016-02-18 12:27:00 +02002740 throttle_config_init(&cfg);
Eric Blake4dc93972016-07-13 21:50:21 -06002741 cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps;
2742 cfg.buckets[THROTTLE_BPS_READ].avg = arg->bps_rd;
2743 cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002744
Eric Blake4dc93972016-07-13 21:50:21 -06002745 cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops;
2746 cfg.buckets[THROTTLE_OPS_READ].avg = arg->iops_rd;
2747 cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr;
Benoît Canetcc0681c2013-09-02 14:14:39 +02002748
Eric Blake4dc93972016-07-13 21:50:21 -06002749 if (arg->has_bps_max) {
2750 cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002751 }
Eric Blake4dc93972016-07-13 21:50:21 -06002752 if (arg->has_bps_rd_max) {
2753 cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002754 }
Eric Blake4dc93972016-07-13 21:50:21 -06002755 if (arg->has_bps_wr_max) {
2756 cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002757 }
Eric Blake4dc93972016-07-13 21:50:21 -06002758 if (arg->has_iops_max) {
2759 cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002760 }
Eric Blake4dc93972016-07-13 21:50:21 -06002761 if (arg->has_iops_rd_max) {
2762 cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002763 }
Eric Blake4dc93972016-07-13 21:50:21 -06002764 if (arg->has_iops_wr_max) {
2765 cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002766 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002767
Eric Blake4dc93972016-07-13 21:50:21 -06002768 if (arg->has_bps_max_length) {
2769 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002770 }
Eric Blake4dc93972016-07-13 21:50:21 -06002771 if (arg->has_bps_rd_max_length) {
2772 cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002773 }
Eric Blake4dc93972016-07-13 21:50:21 -06002774 if (arg->has_bps_wr_max_length) {
2775 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002776 }
Eric Blake4dc93972016-07-13 21:50:21 -06002777 if (arg->has_iops_max_length) {
2778 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002779 }
Eric Blake4dc93972016-07-13 21:50:21 -06002780 if (arg->has_iops_rd_max_length) {
2781 cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002782 }
Eric Blake4dc93972016-07-13 21:50:21 -06002783 if (arg->has_iops_wr_max_length) {
2784 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002785 }
2786
Eric Blake4dc93972016-07-13 21:50:21 -06002787 if (arg->has_iops_size) {
2788 cfg.op_size = arg->iops_size;
Benoît Canet2024c1d2013-09-02 14:14:41 +02002789 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002790
Alberto Garciad5851082016-02-18 12:26:59 +02002791 if (!throttle_is_valid(&cfg, errp)) {
Max Reitz5433c242015-10-19 17:53:29 +02002792 goto out;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002793 }
2794
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002795 if (throttle_enabled(&cfg)) {
2796 /* Enable I/O limits if they're not enabled yet, otherwise
2797 * just update the throttling group. */
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002798 if (!blk_get_public(blk)->throttle_group_member.throttle_state) {
Eric Blake4dc93972016-07-13 21:50:21 -06002799 blk_io_limits_enable(blk,
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002800 arg->has_group ? arg->group :
2801 arg->has_device ? arg->device :
2802 arg->id);
Eric Blake4dc93972016-07-13 21:50:21 -06002803 } else if (arg->has_group) {
2804 blk_io_limits_update_group(blk, arg->group);
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002805 }
2806 /* Set the new throttling configuration */
Kevin Wolf97148072016-03-21 13:53:52 +01002807 blk_set_io_limits(blk, &cfg);
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002808 } else if (blk_get_public(blk)->throttle_group_member.throttle_state) {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002809 /* If all throttling settings are set to 0, disable I/O limits */
Kevin Wolf97148072016-03-21 13:53:52 +01002810 blk_io_limits_disable(blk);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002811 }
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002812
Max Reitz5433c242015-10-19 17:53:29 +02002813out:
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002814 aio_context_release(aio_context);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002815}
2816
John Snow341ebc22015-04-17 19:49:52 -04002817void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2818 bool has_granularity, uint32_t granularity,
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002819 bool has_persistent, bool persistent,
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002820 bool has_autoload, bool autoload,
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002821 bool has_disabled, bool disabled,
John Snow341ebc22015-04-17 19:49:52 -04002822 Error **errp)
2823{
John Snow341ebc22015-04-17 19:49:52 -04002824 BlockDriverState *bs;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002825 BdrvDirtyBitmap *bitmap;
John Snow0a6c86d2019-02-19 17:49:43 -05002826 AioContext *aio_context = NULL;
John Snow341ebc22015-04-17 19:49:52 -04002827
2828 if (!name || name[0] == '\0') {
2829 error_setg(errp, "Bitmap name cannot be empty");
2830 return;
2831 }
2832
2833 bs = bdrv_lookup_bs(node, node, errp);
2834 if (!bs) {
2835 return;
2836 }
2837
John Snow341ebc22015-04-17 19:49:52 -04002838 if (has_granularity) {
2839 if (granularity < 512 || !is_power_of_2(granularity)) {
2840 error_setg(errp, "Granularity must be power of 2 "
2841 "and at least 512");
Paolo Bonzini21198822017-06-05 14:39:03 +02002842 return;
John Snow341ebc22015-04-17 19:49:52 -04002843 }
2844 } else {
2845 /* Default to cluster size, if available: */
2846 granularity = bdrv_get_default_bitmap_granularity(bs);
2847 }
2848
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002849 if (!has_persistent) {
2850 persistent = false;
2851 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002852
Vladimir Sementsov-Ogievskiy3e99da52018-02-02 19:07:52 +03002853 if (has_autoload) {
2854 warn_report("Autoload option is deprecated and its value is ignored");
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002855 }
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002856
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002857 if (!has_disabled) {
2858 disabled = false;
2859 }
2860
John Snow0a6c86d2019-02-19 17:49:43 -05002861 if (persistent) {
2862 aio_context = bdrv_get_aio_context(bs);
2863 aio_context_acquire(aio_context);
2864 if (!bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp)) {
2865 goto out;
2866 }
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002867 }
2868
2869 bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp);
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002870 if (bitmap == NULL) {
John Snow0a6c86d2019-02-19 17:49:43 -05002871 goto out;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002872 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002873
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002874 if (disabled) {
2875 bdrv_disable_dirty_bitmap(bitmap);
2876 }
2877
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002878 bdrv_dirty_bitmap_set_persistance(bitmap, persistent);
John Snow0a6c86d2019-02-19 17:49:43 -05002879 out:
2880 if (aio_context) {
2881 aio_context_release(aio_context);
2882 }
John Snow341ebc22015-04-17 19:49:52 -04002883}
2884
2885void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2886 Error **errp)
2887{
John Snow341ebc22015-04-17 19:49:52 -04002888 BlockDriverState *bs;
2889 BdrvDirtyBitmap *bitmap;
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002890 Error *local_err = NULL;
John Snow0a6c86d2019-02-19 17:49:43 -05002891 AioContext *aio_context = NULL;
John Snow341ebc22015-04-17 19:49:52 -04002892
Paolo Bonzini21198822017-06-05 14:39:03 +02002893 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snow341ebc22015-04-17 19:49:52 -04002894 if (!bitmap || !bs) {
2895 return;
2896 }
2897
John Snow993edc02018-10-29 16:23:16 -04002898 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
John Snow9bd2b082015-04-17 19:49:57 -04002899 error_setg(errp,
John Snow993edc02018-10-29 16:23:16 -04002900 "Bitmap '%s' is currently in use by another operation and"
2901 " cannot be removed", name);
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04002902 return;
John Snow9bd2b082015-04-17 19:49:57 -04002903 }
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002904
2905 if (bdrv_dirty_bitmap_get_persistance(bitmap)) {
John Snow0a6c86d2019-02-19 17:49:43 -05002906 aio_context = bdrv_get_aio_context(bs);
2907 aio_context_acquire(aio_context);
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002908 bdrv_remove_persistent_dirty_bitmap(bs, name, &local_err);
2909 if (local_err != NULL) {
2910 error_propagate(errp, local_err);
John Snow0a6c86d2019-02-19 17:49:43 -05002911 goto out;
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002912 }
2913 }
2914
John Snow341ebc22015-04-17 19:49:52 -04002915 bdrv_release_dirty_bitmap(bs, bitmap);
John Snow0a6c86d2019-02-19 17:49:43 -05002916 out:
2917 if (aio_context) {
2918 aio_context_release(aio_context);
2919 }
John Snow341ebc22015-04-17 19:49:52 -04002920}
2921
John Snowe74e6b72015-04-17 19:49:59 -04002922/**
2923 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2924 * immediately after a full backup operation.
2925 */
2926void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2927 Error **errp)
2928{
John Snowe74e6b72015-04-17 19:49:59 -04002929 BdrvDirtyBitmap *bitmap;
2930 BlockDriverState *bs;
2931
Paolo Bonzini21198822017-06-05 14:39:03 +02002932 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snowe74e6b72015-04-17 19:49:59 -04002933 if (!bitmap || !bs) {
2934 return;
2935 }
2936
John Snow993edc02018-10-29 16:23:16 -04002937 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
John Snowe74e6b72015-04-17 19:49:59 -04002938 error_setg(errp,
John Snow993edc02018-10-29 16:23:16 -04002939 "Bitmap '%s' is currently in use by another operation"
2940 " and cannot be cleared", name);
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04002941 return;
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002942 } else if (bdrv_dirty_bitmap_readonly(bitmap)) {
2943 error_setg(errp, "Bitmap '%s' is readonly and cannot be cleared", name);
2944 return;
John Snowe74e6b72015-04-17 19:49:59 -04002945 }
2946
Fam Zhengdf9a6812015-11-09 18:16:54 +08002947 bdrv_clear_dirty_bitmap(bitmap, NULL);
John Snowe74e6b72015-04-17 19:49:59 -04002948}
2949
John Snow0e2b7f02018-12-21 04:35:22 -05002950void qmp_block_dirty_bitmap_enable(const char *node, const char *name,
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002951 Error **errp)
2952{
2953 BlockDriverState *bs;
2954 BdrvDirtyBitmap *bitmap;
2955
2956 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
2957 if (!bitmap) {
2958 return;
2959 }
2960
John Snowb053bb52018-10-29 16:23:16 -04002961 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002962 error_setg(errp,
John Snowb053bb52018-10-29 16:23:16 -04002963 "Bitmap '%s' is currently in use by another operation"
2964 " and cannot be enabled", name);
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002965 return;
2966 }
2967
2968 bdrv_enable_dirty_bitmap(bitmap);
2969}
2970
John Snow0e2b7f02018-12-21 04:35:22 -05002971void qmp_block_dirty_bitmap_disable(const char *node, const char *name,
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002972 Error **errp)
2973{
2974 BlockDriverState *bs;
2975 BdrvDirtyBitmap *bitmap;
2976
2977 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
2978 if (!bitmap) {
2979 return;
2980 }
2981
John Snowb053bb52018-10-29 16:23:16 -04002982 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002983 error_setg(errp,
John Snowb053bb52018-10-29 16:23:16 -04002984 "Bitmap '%s' is currently in use by another operation"
2985 " and cannot be disabled", name);
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002986 return;
2987 }
2988
2989 bdrv_disable_dirty_bitmap(bitmap);
2990}
2991
John Snow360d4e42018-12-21 04:35:21 -05002992static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node,
2993 const char *target,
2994 strList *bitmaps,
2995 HBitmap **backup,
2996 Error **errp)
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002997{
2998 BlockDriverState *bs;
John Snow360d4e42018-12-21 04:35:21 -05002999 BdrvDirtyBitmap *dst, *src, *anon;
3000 strList *lst;
3001 Error *local_err = NULL;
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04003002
John Snow360d4e42018-12-21 04:35:21 -05003003 dst = block_dirty_bitmap_lookup(node, target, &bs, errp);
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04003004 if (!dst) {
John Snow360d4e42018-12-21 04:35:21 -05003005 return NULL;
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04003006 }
3007
John Snow360d4e42018-12-21 04:35:21 -05003008 anon = bdrv_create_dirty_bitmap(bs, bdrv_dirty_bitmap_granularity(dst),
3009 NULL, errp);
3010 if (!anon) {
3011 return NULL;
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04003012 }
3013
John Snow360d4e42018-12-21 04:35:21 -05003014 for (lst = bitmaps; lst; lst = lst->next) {
3015 src = bdrv_find_dirty_bitmap(bs, lst->value);
3016 if (!src) {
3017 error_setg(errp, "Dirty bitmap '%s' not found", lst->value);
3018 dst = NULL;
3019 goto out;
3020 }
3021
3022 bdrv_merge_dirty_bitmap(anon, src, NULL, &local_err);
3023 if (local_err) {
3024 error_propagate(errp, local_err);
3025 dst = NULL;
3026 goto out;
3027 }
3028 }
3029
3030 /* Merge into dst; dst is unchanged on failure. */
3031 bdrv_merge_dirty_bitmap(dst, anon, backup, errp);
3032
3033 out:
3034 bdrv_release_dirty_bitmap(bs, anon);
3035 return dst;
3036}
3037
John Snow0e2b7f02018-12-21 04:35:22 -05003038void qmp_block_dirty_bitmap_merge(const char *node, const char *target,
3039 strList *bitmaps, Error **errp)
John Snow360d4e42018-12-21 04:35:21 -05003040{
3041 do_block_dirty_bitmap_merge(node, target, bitmaps, NULL, errp);
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04003042}
3043
Vladimir Sementsov-Ogievskiya3b52532017-06-28 15:05:25 +03003044BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
3045 const char *name,
3046 Error **errp)
3047{
3048 BdrvDirtyBitmap *bitmap;
3049 BlockDriverState *bs;
3050 BlockDirtyBitmapSha256 *ret = NULL;
3051 char *sha256;
3052
3053 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
3054 if (!bitmap || !bs) {
3055 return NULL;
3056 }
3057
3058 sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp);
3059 if (sha256 == NULL) {
3060 return NULL;
3061 }
3062
3063 ret = g_new(BlockDirtyBitmapSha256, 1);
3064 ret->sha256 = sha256;
3065
3066 return ret;
3067}
3068
Markus Armbruster072ebe62015-03-05 17:00:56 +01003069void hmp_drive_del(Monitor *mon, const QDict *qdict)
Ryan Harper9063f812010-11-12 11:07:13 -06003070{
3071 const char *id = qdict_get_str(qdict, "id");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02003072 BlockBackend *blk;
Ryan Harper9063f812010-11-12 11:07:13 -06003073 BlockDriverState *bs;
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003074 AioContext *aio_context;
Fam Zheng3718d8a2014-05-23 21:29:43 +08003075 Error *local_err = NULL;
Ryan Harper9063f812010-11-12 11:07:13 -06003076
Kevin Wolf2073d412016-02-23 17:50:37 +01003077 bs = bdrv_find_node(id);
3078 if (bs) {
Markus Armbruster79b7a772017-03-21 17:53:28 +01003079 qmp_blockdev_del(id, &local_err);
Kevin Wolf2073d412016-02-23 17:50:37 +01003080 if (local_err) {
3081 error_report_err(local_err);
3082 }
3083 return;
3084 }
3085
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02003086 blk = blk_by_name(id);
3087 if (!blk) {
Markus Armbrusterb1422f22014-05-16 11:00:09 +02003088 error_report("Device '%s' not found", id);
Markus Armbruster072ebe62015-03-05 17:00:56 +01003089 return;
Ryan Harper9063f812010-11-12 11:07:13 -06003090 }
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003091
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02003092 if (!blk_legacy_dinfo(blk)) {
Markus Armbruster48f364d2014-09-11 16:45:39 +02003093 error_report("Deleting device added with blockdev-add"
3094 " is not supported");
Markus Armbruster072ebe62015-03-05 17:00:56 +01003095 return;
Markus Armbruster48f364d2014-09-11 16:45:39 +02003096 }
3097
Max Reitz5433c242015-10-19 17:53:29 +02003098 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003099 aio_context_acquire(aio_context);
3100
Max Reitz5433c242015-10-19 17:53:29 +02003101 bs = blk_bs(blk);
3102 if (bs) {
3103 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
3104 error_report_err(local_err);
3105 aio_context_release(aio_context);
3106 return;
3107 }
Ryan Harper9063f812010-11-12 11:07:13 -06003108
Max Reitz938abd42016-01-29 16:36:09 +01003109 blk_remove_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02003110 }
Ryan Harper9063f812010-11-12 11:07:13 -06003111
Max Reitz7c735872016-03-16 19:54:39 +01003112 /* Make the BlockBackend and the attached BlockDriverState anonymous */
Max Reitzefaa7c42016-03-16 19:54:38 +01003113 monitor_remove_blk(blk);
3114
Max Reitz7c735872016-03-16 19:54:39 +01003115 /* If this BlockBackend has a device attached to it, its refcount will be
3116 * decremented when the device is removed; otherwise we have to do so here.
Ryan Harperd22b2f42011-03-29 20:51:47 -05003117 */
Markus Armbrustera7f53e22014-10-07 13:59:25 +02003118 if (blk_get_attached_dev(blk)) {
Stefan Hajnoczi293c51a2013-06-05 10:33:14 +02003119 /* Further I/O must not pause the guest */
Max Reitz373340b2015-10-19 17:53:22 +02003120 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
3121 BLOCKDEV_ON_ERROR_REPORT);
Ryan Harperd22b2f42011-03-29 20:51:47 -05003122 } else {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +02003123 blk_unref(blk);
Ryan Harper9063f812010-11-12 11:07:13 -06003124 }
3125
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003126 aio_context_release(aio_context);
Ryan Harper9063f812010-11-12 11:07:13 -06003127}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003128
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003129void qmp_block_resize(bool has_device, const char *device,
3130 bool has_node_name, const char *node_name,
3131 int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003132{
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003133 Error *local_err = NULL;
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003134 BlockBackend *blk = NULL;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003135 BlockDriverState *bs;
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003136 AioContext *aio_context;
Kevin Wolf87329012013-05-02 15:32:55 +02003137 int ret;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003138
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003139 bs = bdrv_lookup_bs(has_device ? device : NULL,
3140 has_node_name ? node_name : NULL,
3141 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003142 if (local_err) {
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003143 error_propagate(errp, local_err);
3144 return;
3145 }
3146
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003147 aio_context = bdrv_get_aio_context(bs);
3148 aio_context_acquire(aio_context);
3149
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003150 if (!bdrv_is_first_non_filter(bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003151 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003152 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003153 }
3154
3155 if (size < 0) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003156 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003157 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003158 }
3159
Jeff Cody9c75e162014-06-25 16:55:30 -04003160 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003161 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003162 goto out;
Jeff Cody9c75e162014-06-25 16:55:30 -04003163 }
3164
Kevin Wolf6d0eb642017-01-20 17:07:26 +01003165 blk = blk_new(BLK_PERM_RESIZE, BLK_PERM_ALL);
Kevin Wolfd7086422017-01-13 19:02:32 +01003166 ret = blk_insert_bs(blk, bs, errp);
3167 if (ret < 0) {
3168 goto out;
3169 }
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003170
John Snow698bdfa2017-05-10 13:39:45 -04003171 bdrv_drained_begin(bs);
Max Reitz3a691c52017-06-13 22:20:54 +02003172 ret = blk_truncate(blk, size, PREALLOC_MODE_OFF, errp);
John Snow698bdfa2017-05-10 13:39:45 -04003173 bdrv_drained_end(bs);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003174
3175out:
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003176 blk_unref(blk);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003177 aio_context_release(aio_context);
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003178}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003179
Alberto Garcia23233222016-07-05 17:28:59 +03003180void qmp_block_stream(bool has_job_id, const char *job_id, const char *device,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003181 bool has_base, const char *base,
Alberto Garcia312fe092016-10-28 10:08:19 +03003182 bool has_base_node, const char *base_node,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003183 bool has_backing_file, const char *backing_file,
3184 bool has_speed, int64_t speed,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003185 bool has_on_error, BlockdevOnError on_error,
John Snow241ca1a2018-09-06 09:02:23 -04003186 bool has_auto_finalize, bool auto_finalize,
3187 bool has_auto_dismiss, bool auto_dismiss,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003188 Error **errp)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003189{
Alberto Garcia554b6142016-10-28 10:08:11 +03003190 BlockDriverState *bs, *iter;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003191 BlockDriverState *base_bs = NULL;
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003192 AioContext *aio_context;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003193 Error *local_err = NULL;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003194 const char *base_name = NULL;
John Snowcf6320d2018-09-06 09:02:12 -04003195 int job_flags = JOB_DEFAULT;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003196
Paolo Bonzini1d809092012-09-28 17:22:59 +02003197 if (!has_on_error) {
3198 on_error = BLOCKDEV_ON_ERROR_REPORT;
3199 }
3200
Alberto Garcia554b6142016-10-28 10:08:11 +03003201 bs = bdrv_lookup_bs(device, device, errp);
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003202 if (!bs) {
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003203 return;
3204 }
3205
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003206 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003207 aio_context_acquire(aio_context);
3208
Alberto Garcia312fe092016-10-28 10:08:19 +03003209 if (has_base && has_base_node) {
3210 error_setg(errp, "'base' and 'base-node' cannot be specified "
3211 "at the same time");
3212 goto out;
3213 }
3214
Jeff Cody13d8cc52014-06-25 15:40:11 -04003215 if (has_base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003216 base_bs = bdrv_find_backing_image(bs, base);
3217 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003218 error_setg(errp, QERR_BASE_NOT_FOUND, base);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003219 goto out;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003220 }
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003221 assert(bdrv_get_aio_context(base_bs) == aio_context);
Jeff Cody13d8cc52014-06-25 15:40:11 -04003222 base_name = base;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003223 }
3224
Alberto Garcia312fe092016-10-28 10:08:19 +03003225 if (has_base_node) {
3226 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
3227 if (!base_bs) {
3228 goto out;
3229 }
3230 if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) {
3231 error_setg(errp, "Node '%s' is not a backing image of '%s'",
3232 base_node, device);
3233 goto out;
3234 }
3235 assert(bdrv_get_aio_context(base_bs) == aio_context);
Max Reitzf30c66b2019-02-01 20:29:05 +01003236 bdrv_refresh_filename(base_bs);
Alberto Garcia312fe092016-10-28 10:08:19 +03003237 base_name = base_bs->filename;
3238 }
3239
Alberto Garcia554b6142016-10-28 10:08:11 +03003240 /* Check for op blockers in the whole chain between bs and base */
3241 for (iter = bs; iter && iter != base_bs; iter = backing_bs(iter)) {
3242 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
3243 goto out;
3244 }
3245 }
3246
Jeff Cody13d8cc52014-06-25 15:40:11 -04003247 /* if we are streaming the entire chain, the result will have no backing
3248 * file, and specifying one is therefore an error */
3249 if (base_bs == NULL && has_backing_file) {
3250 error_setg(errp, "backing file specified, but streaming the "
3251 "entire chain");
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003252 goto out;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003253 }
3254
3255 /* backing_file string overrides base bs filename */
3256 base_name = has_backing_file ? backing_file : base_name;
3257
John Snow241ca1a2018-09-06 09:02:23 -04003258 if (has_auto_finalize && !auto_finalize) {
3259 job_flags |= JOB_MANUAL_FINALIZE;
3260 }
3261 if (has_auto_dismiss && !auto_dismiss) {
3262 job_flags |= JOB_MANUAL_DISMISS;
3263 }
3264
Alberto Garcia23233222016-07-05 17:28:59 +03003265 stream_start(has_job_id ? job_id : NULL, bs, base_bs, base_name,
John Snowcf6320d2018-09-06 09:02:12 -04003266 job_flags, has_speed ? speed : 0, on_error, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003267 if (local_err) {
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003268 error_propagate(errp, local_err);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003269 goto out;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003270 }
3271
3272 trace_qmp_block_stream(bs, bs->job);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003273
3274out:
3275 aio_context_release(aio_context);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003276}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003277
Alberto Garciafd62c602016-07-05 17:29:00 +03003278void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
Kevin Wolf3c605f42017-06-27 17:18:20 +02003279 bool has_base_node, const char *base_node,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003280 bool has_base, const char *base,
Kevin Wolf3c605f42017-06-27 17:18:20 +02003281 bool has_top_node, const char *top_node,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003282 bool has_top, const char *top,
Jeff Cody54e26902014-06-25 15:40:10 -04003283 bool has_backing_file, const char *backing_file,
Jeff Codyed61fc12012-09-27 13:29:16 -04003284 bool has_speed, int64_t speed,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003285 bool has_filter_node_name, const char *filter_node_name,
John Snow96fbf532018-09-06 09:02:21 -04003286 bool has_auto_finalize, bool auto_finalize,
3287 bool has_auto_dismiss, bool auto_dismiss,
Jeff Codyed61fc12012-09-27 13:29:16 -04003288 Error **errp)
3289{
3290 BlockDriverState *bs;
Alberto Garcia058223a2016-10-28 10:08:07 +03003291 BlockDriverState *iter;
Jeff Codyed61fc12012-09-27 13:29:16 -04003292 BlockDriverState *base_bs, *top_bs;
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003293 AioContext *aio_context;
Jeff Codyed61fc12012-09-27 13:29:16 -04003294 Error *local_err = NULL;
3295 /* This will be part of the QMP command, if/when the
3296 * BlockdevOnError change for blkmirror makes it in
3297 */
Paolo Bonzini92aa5c62012-09-28 17:22:55 +02003298 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
John Snow53607822018-09-06 09:02:10 -04003299 int job_flags = JOB_DEFAULT;
Jeff Codyed61fc12012-09-27 13:29:16 -04003300
Max Reitz54504662014-04-10 19:36:25 +02003301 if (!has_speed) {
3302 speed = 0;
3303 }
Kevin Wolf0db832f2017-02-20 18:10:05 +01003304 if (!has_filter_node_name) {
3305 filter_node_name = NULL;
3306 }
John Snow96fbf532018-09-06 09:02:21 -04003307 if (has_auto_finalize && !auto_finalize) {
3308 job_flags |= JOB_MANUAL_FINALIZE;
3309 }
3310 if (has_auto_dismiss && !auto_dismiss) {
3311 job_flags |= JOB_MANUAL_DISMISS;
3312 }
Max Reitz54504662014-04-10 19:36:25 +02003313
Jeff Cody7676e2c2014-06-30 15:14:15 +02003314 /* Important Note:
3315 * libvirt relies on the DeviceNotFound error class in order to probe for
3316 * live commit feature versions; for this to work, we must make sure to
3317 * perform the device lookup before any generic errors that may occur in a
3318 * scenario in which all optional arguments are omitted. */
Kevin Wolf1d13b162016-06-23 14:20:24 +02003319 bs = qmp_get_root_bs(device, &local_err);
3320 if (!bs) {
3321 bs = bdrv_lookup_bs(device, device, NULL);
3322 if (!bs) {
3323 error_free(local_err);
3324 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3325 "Device '%s' not found", device);
3326 } else {
3327 error_propagate(errp, local_err);
3328 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003329 return;
3330 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003331
Kevin Wolf1d13b162016-06-23 14:20:24 +02003332 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003333 aio_context_acquire(aio_context);
3334
Fam Zhengbb000212014-09-11 13:14:00 +08003335 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003336 goto out;
Fam Zheng628ff682014-05-23 21:29:44 +08003337 }
3338
Jeff Codyed61fc12012-09-27 13:29:16 -04003339 /* default top_bs is the active layer */
3340 top_bs = bs;
3341
Kevin Wolf3c605f42017-06-27 17:18:20 +02003342 if (has_top_node && has_top) {
3343 error_setg(errp, "'top-node' and 'top' are mutually exclusive");
3344 goto out;
3345 } else if (has_top_node) {
3346 top_bs = bdrv_lookup_bs(NULL, top_node, errp);
3347 if (top_bs == NULL) {
3348 goto out;
3349 }
3350 if (!bdrv_chain_contains(bs, top_bs)) {
3351 error_setg(errp, "'%s' is not in this backing file chain",
3352 top_node);
3353 goto out;
3354 }
3355 } else if (has_top && top) {
Max Reitzf30c66b2019-02-01 20:29:05 +01003356 /* This strcmp() is just a shortcut, there is no need to
3357 * refresh @bs's filename. If it mismatches,
3358 * bdrv_find_backing_image() will do the refresh and may still
3359 * return @bs. */
Jeff Codyed61fc12012-09-27 13:29:16 -04003360 if (strcmp(bs->filename, top) != 0) {
3361 top_bs = bdrv_find_backing_image(bs, top);
3362 }
3363 }
3364
3365 if (top_bs == NULL) {
3366 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003367 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003368 }
3369
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003370 assert(bdrv_get_aio_context(top_bs) == aio_context);
3371
Kevin Wolf3c605f42017-06-27 17:18:20 +02003372 if (has_base_node && has_base) {
3373 error_setg(errp, "'base-node' and 'base' are mutually exclusive");
3374 goto out;
3375 } else if (has_base_node) {
3376 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
3377 if (base_bs == NULL) {
3378 goto out;
3379 }
3380 if (!bdrv_chain_contains(top_bs, base_bs)) {
3381 error_setg(errp, "'%s' is not in this backing file chain",
3382 base_node);
3383 goto out;
3384 }
3385 } else if (has_base && base) {
Jeff Codyd5208c42012-10-16 15:49:10 -04003386 base_bs = bdrv_find_backing_image(top_bs, base);
3387 } else {
3388 base_bs = bdrv_find_base(top_bs);
3389 }
3390
3391 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003392 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003393 goto out;
Jeff Codyd5208c42012-10-16 15:49:10 -04003394 }
3395
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003396 assert(bdrv_get_aio_context(base_bs) == aio_context);
3397
Alberto Garcia058223a2016-10-28 10:08:07 +03003398 for (iter = top_bs; iter != backing_bs(base_bs); iter = backing_bs(iter)) {
3399 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3400 goto out;
3401 }
Fam Zhengbb000212014-09-11 13:14:00 +08003402 }
3403
Jeff Cody7676e2c2014-06-30 15:14:15 +02003404 /* Do not allow attempts to commit an image into itself */
3405 if (top_bs == base_bs) {
3406 error_setg(errp, "cannot commit an image into itself");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003407 goto out;
Jeff Cody7676e2c2014-06-30 15:14:15 +02003408 }
3409
Fam Zheng20a63d22013-12-16 14:45:31 +08003410 if (top_bs == bs) {
Jeff Cody54e26902014-06-25 15:40:10 -04003411 if (has_backing_file) {
3412 error_setg(errp, "'backing-file' specified,"
3413 " but 'top' is the active layer");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003414 goto out;
Jeff Cody54e26902014-06-25 15:40:10 -04003415 }
John Snow47970df2016-10-27 12:06:57 -04003416 commit_active_start(has_job_id ? job_id : NULL, bs, base_bs,
John Snow53607822018-09-06 09:02:10 -04003417 job_flags, speed, on_error,
Fam Zheng78bbd912017-04-21 20:27:04 +08003418 filter_node_name, NULL, NULL, false, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003419 } else {
Alberto Garcia058223a2016-10-28 10:08:07 +03003420 BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
3421 if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3422 goto out;
3423 }
John Snow53607822018-09-06 09:02:10 -04003424 commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, job_flags,
3425 speed, on_error, has_backing_file ? backing_file : NULL,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003426 filter_node_name, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003427 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003428 if (local_err != NULL) {
3429 error_propagate(errp, local_err);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003430 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003431 }
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003432
3433out:
3434 aio_context_release(aio_context);
Jeff Codyed61fc12012-09-27 13:29:16 -04003435}
3436
Kevin Wolf62c9e412018-04-19 16:09:52 +02003437static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
John Snow111049a2016-11-08 01:50:38 -05003438 Error **errp)
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003439{
3440 BlockDriverState *bs;
3441 BlockDriverState *target_bs;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003442 BlockDriverState *source = NULL;
John Snow111049a2016-11-08 01:50:38 -05003443 BlockJob *job = NULL;
John Snowd58d8452015-04-17 19:49:58 -04003444 BdrvDirtyBitmap *bmap = NULL;
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003445 AioContext *aio_context;
Max Reitze6641712015-08-26 19:47:48 +02003446 QDict *options = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003447 Error *local_err = NULL;
Kevin Wolfbb02b652018-04-19 17:54:56 +02003448 int flags, job_flags = JOB_DEFAULT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003449 int64_t size;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003450 bool set_backing_hd = false;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003451
Pavel Butsykin81206a82016-07-22 11:17:50 +03003452 if (!backup->has_speed) {
3453 backup->speed = 0;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003454 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003455 if (!backup->has_on_source_error) {
3456 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003457 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003458 if (!backup->has_on_target_error) {
3459 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003460 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003461 if (!backup->has_mode) {
3462 backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3463 }
3464 if (!backup->has_job_id) {
3465 backup->job_id = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003466 }
John Snowb40dacd2018-03-10 03:27:44 -05003467 if (!backup->has_auto_finalize) {
3468 backup->auto_finalize = true;
3469 }
3470 if (!backup->has_auto_dismiss) {
3471 backup->auto_dismiss = true;
3472 }
Pavel Butsykin13b94142016-07-22 11:17:52 +03003473 if (!backup->has_compress) {
3474 backup->compress = false;
3475 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003476
Pavel Butsykin81206a82016-07-22 11:17:50 +03003477 bs = qmp_get_root_bs(backup->device, errp);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003478 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003479 return NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003480 }
3481
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003482 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003483 aio_context_acquire(aio_context);
3484
Pavel Butsykin81206a82016-07-22 11:17:50 +03003485 if (!backup->has_format) {
3486 backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ?
3487 NULL : (char*) bs->drv->format_name;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003488 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003489
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003490 /* Early check to avoid creating target */
Fam Zheng3718d8a2014-05-23 21:29:43 +08003491 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003492 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003493 }
3494
Kevin Wolf61de4c62016-03-18 17:46:45 +01003495 flags = bs->open_flags | BDRV_O_RDWR;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003496
Ian Mainfc5d3f82013-07-26 11:39:04 -07003497 /* See if we have a backing HD we can use to create our new image
3498 * on top of. */
Pavel Butsykin81206a82016-07-22 11:17:50 +03003499 if (backup->sync == MIRROR_SYNC_MODE_TOP) {
Kevin Wolf760e0062015-06-17 14:55:21 +02003500 source = backing_bs(bs);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003501 if (!source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003502 backup->sync = MIRROR_SYNC_MODE_FULL;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003503 }
3504 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003505 if (backup->sync == MIRROR_SYNC_MODE_NONE) {
Ian Mainfc5d3f82013-07-26 11:39:04 -07003506 source = bs;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003507 flags |= BDRV_O_NO_BACKING;
3508 set_backing_hd = true;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003509 }
3510
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003511 size = bdrv_getlength(bs);
3512 if (size < 0) {
3513 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003514 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003515 }
3516
Pavel Butsykin81206a82016-07-22 11:17:50 +03003517 if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
3518 assert(backup->format);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003519 if (source) {
Max Reitzf30c66b2019-02-01 20:29:05 +01003520 bdrv_refresh_filename(source);
Pavel Butsykin81206a82016-07-22 11:17:50 +03003521 bdrv_img_create(backup->target, backup->format, source->filename,
Ian Mainfc5d3f82013-07-26 11:39:04 -07003522 source->drv->format_name, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003523 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003524 } else {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003525 bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003526 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003527 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003528 }
3529
Markus Armbruster84d18f02014-01-30 15:07:28 +01003530 if (local_err) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003531 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003532 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003533 }
3534
Pavel Butsykin81206a82016-07-22 11:17:50 +03003535 if (backup->format) {
Fam Zhengfc0932f2017-05-03 00:35:53 +08003536 if (!options) {
3537 options = qdict_new();
3538 }
Eric Blake46f5ac22017-04-27 16:58:17 -05003539 qdict_put_str(options, "driver", backup->format);
Max Reitze6641712015-08-26 19:47:48 +02003540 }
3541
Pavel Butsykin81206a82016-07-22 11:17:50 +03003542 target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003543 if (!target_bs) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003544 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003545 }
3546
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003547 bdrv_set_aio_context(target_bs, aio_context);
3548
Fam Zhengfc0932f2017-05-03 00:35:53 +08003549 if (set_backing_hd) {
3550 bdrv_set_backing_hd(target_bs, source, &local_err);
3551 if (local_err) {
3552 bdrv_unref(target_bs);
3553 goto out;
3554 }
3555 }
3556
Pavel Butsykin81206a82016-07-22 11:17:50 +03003557 if (backup->has_bitmap) {
3558 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
John Snowd58d8452015-04-17 19:49:58 -04003559 if (!bmap) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003560 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
Max Reitz0702d3d2015-11-09 23:39:10 +01003561 bdrv_unref(target_bs);
John Snowd58d8452015-04-17 19:49:58 -04003562 goto out;
3563 }
John Snowb27a6b82018-10-29 16:23:16 -04003564 if (bdrv_dirty_bitmap_user_locked(bmap)) {
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04003565 error_setg(errp,
John Snowb27a6b82018-10-29 16:23:16 -04003566 "Bitmap '%s' is currently in use by another operation"
3567 " and cannot be used for backup", backup->bitmap);
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04003568 goto out;
3569 }
John Snowd58d8452015-04-17 19:49:58 -04003570 }
John Snowb40dacd2018-03-10 03:27:44 -05003571 if (!backup->auto_finalize) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003572 job_flags |= JOB_MANUAL_FINALIZE;
John Snowb40dacd2018-03-10 03:27:44 -05003573 }
3574 if (!backup->auto_dismiss) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003575 job_flags |= JOB_MANUAL_DISMISS;
John Snowb40dacd2018-03-10 03:27:44 -05003576 }
John Snowd58d8452015-04-17 19:49:58 -04003577
John Snow111049a2016-11-08 01:50:38 -05003578 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
3579 backup->sync, bmap, backup->compress,
3580 backup->on_source_error, backup->on_target_error,
John Snowb40dacd2018-03-10 03:27:44 -05003581 job_flags, NULL, NULL, txn, &local_err);
Kevin Wolf5c438bc2016-04-14 13:09:53 +02003582 bdrv_unref(target_bs);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003583 if (local_err != NULL) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003584 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003585 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003586 }
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003587
3588out:
3589 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003590 return job;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003591}
3592
Pavel Butsykin81206a82016-07-22 11:17:50 +03003593void qmp_drive_backup(DriveBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003594{
John Snow111049a2016-11-08 01:50:38 -05003595
3596 BlockJob *job;
3597 job = do_drive_backup(arg, NULL, errp);
3598 if (job) {
Kevin Wolfda01ff72018-04-13 17:31:02 +02003599 job_start(&job->job);
John Snow111049a2016-11-08 01:50:38 -05003600 }
John Snow78f51fd2015-11-05 18:13:17 -05003601}
3602
Benoît Canetc13163f2014-01-23 21:31:34 +01003603BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3604{
Alberto Garciad5a8ee62015-04-17 14:52:43 +03003605 return bdrv_named_nodes_list(errp);
Benoît Canetc13163f2014-01-23 21:31:34 +01003606}
3607
Vladimir Sementsov-Ogievskiy5d3b4e92018-12-21 20:09:07 +03003608XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp)
3609{
3610 return bdrv_get_xdbg_block_graph(errp);
3611}
3612
Kevin Wolf62c9e412018-04-19 16:09:52 +02003613BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
John Snow111049a2016-11-08 01:50:38 -05003614 Error **errp)
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003615{
3616 BlockDriverState *bs;
3617 BlockDriverState *target_bs;
3618 Error *local_err = NULL;
John Snow945c1ee2018-10-29 16:23:14 -04003619 BdrvDirtyBitmap *bmap = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003620 AioContext *aio_context;
John Snow111049a2016-11-08 01:50:38 -05003621 BlockJob *job = NULL;
Kevin Wolfbb02b652018-04-19 17:54:56 +02003622 int job_flags = JOB_DEFAULT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003623
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003624 if (!backup->has_speed) {
3625 backup->speed = 0;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003626 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003627 if (!backup->has_on_source_error) {
3628 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003629 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003630 if (!backup->has_on_target_error) {
3631 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3632 }
3633 if (!backup->has_job_id) {
3634 backup->job_id = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003635 }
John Snowb40dacd2018-03-10 03:27:44 -05003636 if (!backup->has_auto_finalize) {
3637 backup->auto_finalize = true;
3638 }
3639 if (!backup->has_auto_dismiss) {
3640 backup->auto_dismiss = true;
3641 }
Pavel Butsykin3b7b1232016-07-22 11:17:53 +03003642 if (!backup->has_compress) {
3643 backup->compress = false;
3644 }
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003645
Vladimir Sementsov-Ogievskiy930fe172018-07-02 15:46:29 -04003646 bs = bdrv_lookup_bs(backup->device, backup->device, errp);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003647 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003648 return NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003649 }
3650
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003651 aio_context = bdrv_get_aio_context(bs);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003652 aio_context_acquire(aio_context);
3653
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003654 target_bs = bdrv_lookup_bs(backup->target, backup->target, errp);
Fam Zheng0d978912016-05-23 10:19:35 +08003655 if (!target_bs) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003656 goto out;
3657 }
Max Reitz5433c242015-10-19 17:53:29 +02003658
Fam Zhengefd75562016-05-23 10:19:36 +08003659 if (bdrv_get_aio_context(target_bs) != aio_context) {
3660 if (!bdrv_has_blk(target_bs)) {
3661 /* The target BDS is not attached, we can safely move it to another
3662 * AioContext. */
3663 bdrv_set_aio_context(target_bs, aio_context);
3664 } else {
3665 error_setg(errp, "Target is attached to a different thread from "
3666 "source.");
3667 goto out;
3668 }
3669 }
John Snow945c1ee2018-10-29 16:23:14 -04003670
3671 if (backup->has_bitmap) {
3672 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
3673 if (!bmap) {
3674 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
3675 goto out;
3676 }
John Snowb27a6b82018-10-29 16:23:16 -04003677 if (bdrv_dirty_bitmap_user_locked(bmap)) {
John Snow945c1ee2018-10-29 16:23:14 -04003678 error_setg(errp,
John Snowb27a6b82018-10-29 16:23:16 -04003679 "Bitmap '%s' is currently in use by another operation"
3680 " and cannot be used for backup", backup->bitmap);
John Snow945c1ee2018-10-29 16:23:14 -04003681 goto out;
3682 }
3683 }
3684
John Snowb40dacd2018-03-10 03:27:44 -05003685 if (!backup->auto_finalize) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003686 job_flags |= JOB_MANUAL_FINALIZE;
John Snowb40dacd2018-03-10 03:27:44 -05003687 }
3688 if (!backup->auto_dismiss) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003689 job_flags |= JOB_MANUAL_DISMISS;
John Snowb40dacd2018-03-10 03:27:44 -05003690 }
John Snow111049a2016-11-08 01:50:38 -05003691 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
John Snow945c1ee2018-10-29 16:23:14 -04003692 backup->sync, bmap, backup->compress,
John Snow111049a2016-11-08 01:50:38 -05003693 backup->on_source_error, backup->on_target_error,
John Snowb40dacd2018-03-10 03:27:44 -05003694 job_flags, NULL, NULL, txn, &local_err);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003695 if (local_err != NULL) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003696 error_propagate(errp, local_err);
3697 }
3698out:
3699 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003700 return job;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003701}
3702
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003703void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003704{
John Snow111049a2016-11-08 01:50:38 -05003705 BlockJob *job;
3706 job = do_blockdev_backup(arg, NULL, errp);
3707 if (job) {
Kevin Wolfda01ff72018-04-13 17:31:02 +02003708 job_start(&job->job);
John Snow111049a2016-11-08 01:50:38 -05003709 }
John Snow78f51fd2015-11-05 18:13:17 -05003710}
3711
Fam Zheng4193cdd2015-12-24 12:45:03 +08003712/* Parameter check and block job starting for drive mirroring.
3713 * Caller should hold @device and @target's aio context (must be the same).
3714 **/
Alberto Garcia71aa9862016-07-05 17:28:57 +03003715static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003716 BlockDriverState *target,
3717 bool has_replaces, const char *replaces,
3718 enum MirrorSyncMode sync,
Max Reitz274fcce2016-06-10 20:57:47 +02003719 BlockMirrorBackingMode backing_mode,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003720 bool has_speed, int64_t speed,
3721 bool has_granularity, uint32_t granularity,
3722 bool has_buf_size, int64_t buf_size,
3723 bool has_on_source_error,
3724 BlockdevOnError on_source_error,
3725 bool has_on_target_error,
3726 BlockdevOnError on_target_error,
3727 bool has_unmap, bool unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003728 bool has_filter_node_name,
3729 const char *filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003730 bool has_copy_mode, MirrorCopyMode copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003731 bool has_auto_finalize, bool auto_finalize,
3732 bool has_auto_dismiss, bool auto_dismiss,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003733 Error **errp)
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003734{
John Snowa1999b32018-09-06 09:02:11 -04003735 int job_flags = JOB_DEFAULT;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003736
3737 if (!has_speed) {
3738 speed = 0;
3739 }
Paolo Bonzinib952b552012-10-18 16:49:28 +02003740 if (!has_on_source_error) {
3741 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3742 }
3743 if (!has_on_target_error) {
3744 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3745 }
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003746 if (!has_granularity) {
3747 granularity = 0;
3748 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003749 if (!has_buf_size) {
Wen Congyang48ac0a42015-05-15 15:51:36 +08003750 buf_size = 0;
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003751 }
Fam Zheng0fc9f8e2015-06-08 13:56:08 +08003752 if (!has_unmap) {
3753 unmap = true;
3754 }
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003755 if (!has_filter_node_name) {
3756 filter_node_name = NULL;
3757 }
Max Reitz481deba2018-06-13 20:18:22 +02003758 if (!has_copy_mode) {
3759 copy_mode = MIRROR_COPY_MODE_BACKGROUND;
3760 }
John Snowa6b58ad2018-09-06 09:02:22 -04003761 if (has_auto_finalize && !auto_finalize) {
3762 job_flags |= JOB_MANUAL_FINALIZE;
3763 }
3764 if (has_auto_dismiss && !auto_dismiss) {
3765 job_flags |= JOB_MANUAL_DISMISS;
3766 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003767
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003768 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003769 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3770 "a value in range [512B, 64MB]");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003771 return;
3772 }
3773 if (granularity & (granularity - 1)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003774 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3775 "power of 2");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003776 return;
3777 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003778
Fam Zheng4193cdd2015-12-24 12:45:03 +08003779 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3780 return;
3781 }
Fam Zhenge40e5022015-12-24 12:45:04 +08003782 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3783 return;
3784 }
Fam Zheng4193cdd2015-12-24 12:45:03 +08003785
3786 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3787 sync = MIRROR_SYNC_MODE_FULL;
3788 }
3789
3790 /* pass the node name to replace to mirror start since it's loose coupling
3791 * and will allow to check whether the node still exist at mirror completion
3792 */
Alberto Garcia71aa9862016-07-05 17:28:57 +03003793 mirror_start(job_id, bs, target,
John Snowa1999b32018-09-06 09:02:11 -04003794 has_replaces ? replaces : NULL, job_flags,
Max Reitz274fcce2016-06-10 20:57:47 +02003795 speed, granularity, buf_size, sync, backing_mode,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003796 on_source_error, on_target_error, unmap, filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003797 copy_mode, errp);
Fam Zheng4193cdd2015-12-24 12:45:03 +08003798}
3799
Eric Blakefaecd402016-07-14 16:37:58 -06003800void qmp_drive_mirror(DriveMirror *arg, Error **errp)
Fam Zheng4193cdd2015-12-24 12:45:03 +08003801{
3802 BlockDriverState *bs;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003803 BlockDriverState *source, *target_bs;
3804 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003805 BlockMirrorBackingMode backing_mode;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003806 Error *local_err = NULL;
3807 QDict *options = NULL;
3808 int flags;
3809 int64_t size;
Eric Blakefaecd402016-07-14 16:37:58 -06003810 const char *format = arg->format;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003811
Kevin Wolf0524e932016-06-23 14:20:24 +02003812 bs = qmp_get_root_bs(arg->device, errp);
3813 if (!bs) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003814 return;
3815 }
3816
Paolo Bonzinicb2af912018-02-07 17:29:20 +01003817 /* Early check to avoid creating target */
3818 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3819 return;
3820 }
3821
Kevin Wolf0524e932016-06-23 14:20:24 +02003822 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003823 aio_context_acquire(aio_context);
3824
Eric Blakefaecd402016-07-14 16:37:58 -06003825 if (!arg->has_mode) {
3826 arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003827 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003828
Eric Blakefaecd402016-07-14 16:37:58 -06003829 if (!arg->has_format) {
3830 format = (arg->mode == NEW_IMAGE_MODE_EXISTING
3831 ? NULL : bs->drv->format_name);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003832 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003833
Kevin Wolf61de4c62016-03-18 17:46:45 +01003834 flags = bs->open_flags | BDRV_O_RDWR;
Kevin Wolf760e0062015-06-17 14:55:21 +02003835 source = backing_bs(bs);
Eric Blakefaecd402016-07-14 16:37:58 -06003836 if (!source && arg->sync == MIRROR_SYNC_MODE_TOP) {
3837 arg->sync = MIRROR_SYNC_MODE_FULL;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003838 }
Eric Blakefaecd402016-07-14 16:37:58 -06003839 if (arg->sync == MIRROR_SYNC_MODE_NONE) {
Max Reitz117e0c82013-11-25 20:28:55 +01003840 source = bs;
3841 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003842
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003843 size = bdrv_getlength(bs);
3844 if (size < 0) {
3845 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003846 goto out;
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003847 }
3848
Eric Blakefaecd402016-07-14 16:37:58 -06003849 if (arg->has_replaces) {
Benoît Canet09158f02014-06-27 18:25:25 +02003850 BlockDriverState *to_replace_bs;
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003851 AioContext *replace_aio_context;
3852 int64_t replace_size;
Benoît Canet09158f02014-06-27 18:25:25 +02003853
Eric Blakefaecd402016-07-14 16:37:58 -06003854 if (!arg->has_node_name) {
Benoît Canet09158f02014-06-27 18:25:25 +02003855 error_setg(errp, "a node-name must be provided when replacing a"
3856 " named node of the graph");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003857 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003858 }
3859
Eric Blakefaecd402016-07-14 16:37:58 -06003860 to_replace_bs = check_to_replace_node(bs, arg->replaces, &local_err);
Benoît Canet09158f02014-06-27 18:25:25 +02003861
3862 if (!to_replace_bs) {
3863 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003864 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003865 }
3866
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003867 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3868 aio_context_acquire(replace_aio_context);
3869 replace_size = bdrv_getlength(to_replace_bs);
3870 aio_context_release(replace_aio_context);
3871
3872 if (size != replace_size) {
Benoît Canet09158f02014-06-27 18:25:25 +02003873 error_setg(errp, "cannot replace image with a mirror image of "
3874 "different size");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003875 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003876 }
3877 }
3878
Eric Blakefaecd402016-07-14 16:37:58 -06003879 if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
Max Reitz274fcce2016-06-10 20:57:47 +02003880 backing_mode = MIRROR_SOURCE_BACKING_CHAIN;
3881 } else {
3882 backing_mode = MIRROR_OPEN_BACKING_CHAIN;
3883 }
3884
John Snow2a32c6e2017-07-17 20:34:21 -04003885 /* Don't open backing image in create() */
3886 flags |= BDRV_O_NO_BACKING;
3887
Eric Blakefaecd402016-07-14 16:37:58 -06003888 if ((arg->sync == MIRROR_SYNC_MODE_FULL || !source)
3889 && arg->mode != NEW_IMAGE_MODE_EXISTING)
Max Reitz14526862013-11-06 19:50:44 +01003890 {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003891 /* create new image w/o backing file */
Max Reitze6641712015-08-26 19:47:48 +02003892 assert(format);
Eric Blakefaecd402016-07-14 16:37:58 -06003893 bdrv_img_create(arg->target, format,
Fam Zheng92172832017-04-21 20:27:01 +08003894 NULL, NULL, NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003895 } else {
Eric Blakefaecd402016-07-14 16:37:58 -06003896 switch (arg->mode) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003897 case NEW_IMAGE_MODE_EXISTING:
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003898 break;
3899 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3900 /* create new image with backing file */
Max Reitzf30c66b2019-02-01 20:29:05 +01003901 bdrv_refresh_filename(source);
Eric Blakefaecd402016-07-14 16:37:58 -06003902 bdrv_img_create(arg->target, format,
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003903 source->filename,
3904 source->drv->format_name,
Fam Zheng92172832017-04-21 20:27:01 +08003905 NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003906 break;
3907 default:
3908 abort();
3909 }
3910 }
3911
Markus Armbruster84d18f02014-01-30 15:07:28 +01003912 if (local_err) {
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003913 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003914 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003915 }
3916
Max Reitze6641712015-08-26 19:47:48 +02003917 options = qdict_new();
Eric Blakefaecd402016-07-14 16:37:58 -06003918 if (arg->has_node_name) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003919 qdict_put_str(options, "node-name", arg->node_name);
Benoît Canet4c828dc2014-06-16 12:00:55 +02003920 }
Max Reitze6641712015-08-26 19:47:48 +02003921 if (format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003922 qdict_put_str(options, "driver", format);
Max Reitze6641712015-08-26 19:47:48 +02003923 }
Benoît Canet4c828dc2014-06-16 12:00:55 +02003924
Paolo Bonzinib812f672013-01-21 17:09:43 +01003925 /* Mirroring takes care of copy-on-write using the source's backing
3926 * file.
3927 */
John Snow2a32c6e2017-07-17 20:34:21 -04003928 target_bs = bdrv_open(arg->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003929 if (!target_bs) {
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003930 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003931 }
3932
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003933 bdrv_set_aio_context(target_bs, aio_context);
3934
Eric Blakefaecd402016-07-14 16:37:58 -06003935 blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs,
3936 arg->has_replaces, arg->replaces, arg->sync,
3937 backing_mode, arg->has_speed, arg->speed,
3938 arg->has_granularity, arg->granularity,
3939 arg->has_buf_size, arg->buf_size,
3940 arg->has_on_source_error, arg->on_source_error,
3941 arg->has_on_target_error, arg->on_target_error,
3942 arg->has_unmap, arg->unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003943 false, NULL,
Max Reitz481deba2018-06-13 20:18:22 +02003944 arg->has_copy_mode, arg->copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003945 arg->has_auto_finalize, arg->auto_finalize,
3946 arg->has_auto_dismiss, arg->auto_dismiss,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003947 &local_err);
Kevin Wolfe253f4b2016-04-12 16:17:41 +02003948 bdrv_unref(target_bs);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003949 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003950out:
3951 aio_context_release(aio_context);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003952}
3953
Alberto Garcia71aa9862016-07-05 17:28:57 +03003954void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
3955 const char *device, const char *target,
Fam Zhengdf925622015-12-24 12:45:05 +08003956 bool has_replaces, const char *replaces,
3957 MirrorSyncMode sync,
3958 bool has_speed, int64_t speed,
3959 bool has_granularity, uint32_t granularity,
3960 bool has_buf_size, int64_t buf_size,
3961 bool has_on_source_error,
3962 BlockdevOnError on_source_error,
3963 bool has_on_target_error,
3964 BlockdevOnError on_target_error,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003965 bool has_filter_node_name,
3966 const char *filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003967 bool has_copy_mode, MirrorCopyMode copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003968 bool has_auto_finalize, bool auto_finalize,
3969 bool has_auto_dismiss, bool auto_dismiss,
Fam Zhengdf925622015-12-24 12:45:05 +08003970 Error **errp)
3971{
3972 BlockDriverState *bs;
Fam Zhengdf925622015-12-24 12:45:05 +08003973 BlockDriverState *target_bs;
3974 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003975 BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN;
Fam Zhengdf925622015-12-24 12:45:05 +08003976 Error *local_err = NULL;
3977
Kevin Wolf07eec652016-06-23 14:20:24 +02003978 bs = qmp_get_root_bs(device, errp);
Fam Zhengdf925622015-12-24 12:45:05 +08003979 if (!bs) {
Fam Zhengdf925622015-12-24 12:45:05 +08003980 return;
3981 }
3982
3983 target_bs = bdrv_lookup_bs(target, target, errp);
3984 if (!target_bs) {
3985 return;
3986 }
3987
3988 aio_context = bdrv_get_aio_context(bs);
3989 aio_context_acquire(aio_context);
3990
Fam Zhengdf925622015-12-24 12:45:05 +08003991 bdrv_set_aio_context(target_bs, aio_context);
3992
Alberto Garcia71aa9862016-07-05 17:28:57 +03003993 blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs,
Max Reitz274fcce2016-06-10 20:57:47 +02003994 has_replaces, replaces, sync, backing_mode,
Fam Zhengdf925622015-12-24 12:45:05 +08003995 has_speed, speed,
3996 has_granularity, granularity,
3997 has_buf_size, buf_size,
3998 has_on_source_error, on_source_error,
3999 has_on_target_error, on_target_error,
4000 true, true,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01004001 has_filter_node_name, filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02004002 has_copy_mode, copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04004003 has_auto_finalize, auto_finalize,
4004 has_auto_dismiss, auto_dismiss,
Fam Zhengdf925622015-12-24 12:45:05 +08004005 &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03004006 error_propagate(errp, local_err);
Fam Zhengdf925622015-12-24 12:45:05 +08004007
4008 aio_context_release(aio_context);
4009}
4010
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004011/* Get a block job using its ID and acquire its AioContext */
4012static BlockJob *find_block_job(const char *id, AioContext **aio_context,
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004013 Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004014{
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004015 BlockJob *job;
4016
4017 assert(id != NULL);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004018
Max Reitz5433c242015-10-19 17:53:29 +02004019 *aio_context = NULL;
4020
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004021 job = block_job_get(id);
4022
4023 if (!job) {
4024 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
4025 "Block job '%s' not found", id);
4026 return NULL;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004027 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004028
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004029 *aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004030 aio_context_acquire(*aio_context);
4031
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004032 return job;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004033}
4034
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01004035void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004036{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004037 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004038 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004039
4040 if (!job) {
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004041 return;
4042 }
4043
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01004044 block_job_set_speed(job, speed, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004045 aio_context_release(aio_context);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004046}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004047
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004048void qmp_block_job_cancel(const char *device,
4049 bool has_force, bool force, Error **errp)
4050{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004051 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004052 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004053
4054 if (!job) {
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004055 return;
4056 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004057
4058 if (!has_force) {
4059 force = false;
4060 }
4061
Kevin Wolfb15de822018-04-18 17:10:26 +02004062 if (job_user_paused(&job->job) && !force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04004063 error_setg(errp, "The block job for device '%s' is currently paused",
4064 device);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004065 goto out;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004066 }
4067
4068 trace_qmp_block_job_cancel(job);
Kevin Wolf3d70ff52018-04-24 16:13:52 +02004069 job_user_cancel(&job->job, force, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004070out:
4071 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004072}
4073
4074void qmp_block_job_pause(const char *device, Error **errp)
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004075{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004076 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004077 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004078
John Snow0ec4dfb2018-03-10 03:27:32 -05004079 if (!job) {
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004080 return;
4081 }
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004082
4083 trace_qmp_block_job_pause(job);
Kevin Wolfb15de822018-04-18 17:10:26 +02004084 job_user_pause(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004085 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004086}
4087
4088void qmp_block_job_resume(const char *device, Error **errp)
4089{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004090 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004091 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004092
John Snow0ec4dfb2018-03-10 03:27:32 -05004093 if (!job) {
Paolo Bonzini8acc72a2012-09-28 17:22:50 +02004094 return;
4095 }
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004096
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004097 trace_qmp_block_job_resume(job);
Kevin Wolfb15de822018-04-18 17:10:26 +02004098 job_user_resume(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004099 aio_context_release(aio_context);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004100}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004101
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004102void qmp_block_job_complete(const char *device, Error **errp)
4103{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004104 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004105 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004106
4107 if (!job) {
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004108 return;
4109 }
4110
4111 trace_qmp_block_job_complete(job);
Kevin Wolf3453d972018-04-23 12:24:16 +02004112 job_complete(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004113 aio_context_release(aio_context);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004114}
4115
John Snow11b61fb2018-03-10 03:27:43 -05004116void qmp_block_job_finalize(const char *id, Error **errp)
4117{
4118 AioContext *aio_context;
4119 BlockJob *job = find_block_job(id, &aio_context, errp);
4120
4121 if (!job) {
4122 return;
4123 }
4124
4125 trace_qmp_block_job_finalize(job);
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02004126 job_finalize(&job->job, errp);
John Snow11b61fb2018-03-10 03:27:43 -05004127 aio_context_release(aio_context);
4128}
4129
John Snow75f71052018-03-10 03:27:36 -05004130void qmp_block_job_dismiss(const char *id, Error **errp)
4131{
4132 AioContext *aio_context;
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004133 BlockJob *bjob = find_block_job(id, &aio_context, errp);
4134 Job *job;
John Snow75f71052018-03-10 03:27:36 -05004135
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004136 if (!bjob) {
John Snow75f71052018-03-10 03:27:36 -05004137 return;
4138 }
4139
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004140 trace_qmp_block_job_dismiss(bjob);
4141 job = &bjob->job;
4142 job_dismiss(&job, errp);
John Snow75f71052018-03-10 03:27:36 -05004143 aio_context_release(aio_context);
4144}
4145
Jeff Codyfa40e652014-07-01 09:52:16 +02004146void qmp_change_backing_file(const char *device,
4147 const char *image_node_name,
4148 const char *backing_file,
4149 Error **errp)
4150{
4151 BlockDriverState *bs = NULL;
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004152 AioContext *aio_context;
Jeff Codyfa40e652014-07-01 09:52:16 +02004153 BlockDriverState *image_bs = NULL;
4154 Error *local_err = NULL;
4155 bool ro;
Jeff Codyfa40e652014-07-01 09:52:16 +02004156 int ret;
4157
Kevin Wolf7b5dca32016-06-23 14:20:24 +02004158 bs = qmp_get_root_bs(device, errp);
4159 if (!bs) {
Jeff Codyfa40e652014-07-01 09:52:16 +02004160 return;
4161 }
4162
Kevin Wolf7b5dca32016-06-23 14:20:24 +02004163 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004164 aio_context_acquire(aio_context);
4165
Jeff Codyfa40e652014-07-01 09:52:16 +02004166 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
4167 if (local_err) {
4168 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004169 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004170 }
4171
4172 if (!image_bs) {
4173 error_setg(errp, "image file not found");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004174 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004175 }
4176
4177 if (bdrv_find_base(image_bs) == image_bs) {
4178 error_setg(errp, "not allowing backing file change on an image "
4179 "without a backing file");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004180 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004181 }
4182
4183 /* even though we are not necessarily operating on bs, we need it to
4184 * determine if block ops are currently prohibited on the chain */
4185 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004186 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004187 }
4188
4189 /* final sanity check */
4190 if (!bdrv_chain_contains(bs, image_bs)) {
4191 error_setg(errp, "'%s' and image file are not in the same chain",
4192 device);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004193 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004194 }
4195
4196 /* if not r/w, reopen to make r/w */
Jeff Codyfa40e652014-07-01 09:52:16 +02004197 ro = bdrv_is_read_only(image_bs);
4198
4199 if (ro) {
Alberto Garcia051a60f2018-11-12 16:00:38 +02004200 if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004201 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004202 }
4203 }
4204
4205 ret = bdrv_change_backing_file(image_bs, backing_file,
4206 image_bs->drv ? image_bs->drv->format_name : "");
4207
4208 if (ret < 0) {
4209 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
4210 backing_file);
4211 /* don't exit here, so we can try to restore open flags if
4212 * appropriate */
4213 }
4214
4215 if (ro) {
Alberto Garcia051a60f2018-11-12 16:00:38 +02004216 bdrv_reopen_set_read_only(image_bs, true, &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03004217 error_propagate(errp, local_err);
Jeff Codyfa40e652014-07-01 09:52:16 +02004218 }
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004219
4220out:
4221 aio_context_release(aio_context);
Jeff Codyfa40e652014-07-01 09:52:16 +02004222}
4223
Kevin Wolfabb21ac2016-02-23 17:33:24 +01004224void hmp_drive_add_node(Monitor *mon, const char *optstr)
4225{
4226 QemuOpts *opts;
4227 QDict *qdict;
4228 Error *local_err = NULL;
4229
4230 opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
4231 if (!opts) {
4232 return;
4233 }
4234
4235 qdict = qemu_opts_to_qdict(opts, NULL);
4236
4237 if (!qdict_get_try_str(qdict, "node-name")) {
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +02004238 qobject_unref(qdict);
Kevin Wolfabb21ac2016-02-23 17:33:24 +01004239 error_report("'node-name' needs to be specified");
4240 goto out;
4241 }
4242
4243 BlockDriverState *bs = bds_tree_init(qdict, &local_err);
4244 if (!bs) {
4245 error_report_err(local_err);
4246 goto out;
4247 }
4248
4249 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4250
4251out:
4252 qemu_opts_del(opts);
4253}
4254
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004255void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
4256{
Max Reitzbe4b67b2015-10-19 17:53:09 +02004257 BlockDriverState *bs;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004258 QObject *obj;
Daniel P. Berrange7d5e1992016-09-30 15:45:28 +01004259 Visitor *v = qobject_output_visitor_new(&obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004260 QDict *qdict;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004261 Error *local_err = NULL;
4262
Eric Blake3b098d52016-06-09 10:48:43 -06004263 visit_type_BlockdevOptions(v, NULL, &options, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01004264 if (local_err) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004265 error_propagate(errp, local_err);
4266 goto fail;
4267 }
4268
Eric Blake3b098d52016-06-09 10:48:43 -06004269 visit_complete(v, &obj);
Max Reitz7dc847e2018-02-24 16:40:29 +01004270 qdict = qobject_to(QDict, obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004271
4272 qdict_flatten(qdict);
4273
Kevin Wolf9ec88732016-09-21 14:56:11 +02004274 if (!qdict_get_try_str(qdict, "node-name")) {
4275 error_setg(errp, "'node-name' must be specified for the root node");
4276 goto fail;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004277 }
4278
Kevin Wolf9ec88732016-09-21 14:56:11 +02004279 bs = bds_tree_init(qdict, errp);
4280 if (!bs) {
4281 goto fail;
4282 }
4283
4284 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4285
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004286fail:
Eric Blake3b098d52016-06-09 10:48:43 -06004287 visit_free(v);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004288}
4289
Alberto Garcia1479c732019-03-12 18:48:51 +02004290void qmp_x_blockdev_reopen(BlockdevOptions *options, Error **errp)
4291{
4292 BlockDriverState *bs;
4293 AioContext *ctx;
4294 QObject *obj;
4295 Visitor *v = qobject_output_visitor_new(&obj);
4296 Error *local_err = NULL;
4297 BlockReopenQueue *queue;
4298 QDict *qdict;
4299
4300 /* Check for the selected node name */
4301 if (!options->has_node_name) {
4302 error_setg(errp, "Node name not specified");
4303 goto fail;
4304 }
4305
4306 bs = bdrv_find_node(options->node_name);
4307 if (!bs) {
4308 error_setg(errp, "Cannot find node named '%s'", options->node_name);
4309 goto fail;
4310 }
4311
4312 /* Put all options in a QDict and flatten it */
4313 visit_type_BlockdevOptions(v, NULL, &options, &local_err);
4314 if (local_err) {
4315 error_propagate(errp, local_err);
4316 goto fail;
4317 }
4318
4319 visit_complete(v, &obj);
4320 qdict = qobject_to(QDict, obj);
4321
4322 qdict_flatten(qdict);
4323
4324 /* Perform the reopen operation */
4325 ctx = bdrv_get_aio_context(bs);
4326 aio_context_acquire(ctx);
4327 bdrv_subtree_drained_begin(bs);
4328 queue = bdrv_reopen_queue(NULL, bs, qdict, false);
4329 bdrv_reopen_multiple(queue, errp);
4330 bdrv_subtree_drained_end(bs);
4331 aio_context_release(ctx);
4332
4333fail:
4334 visit_free(v);
4335}
4336
Markus Armbruster79b7a772017-03-21 17:53:28 +01004337void qmp_blockdev_del(const char *node_name, Error **errp)
Alberto Garcia81b936a2015-11-02 16:51:55 +02004338{
4339 AioContext *aio_context;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004340 BlockDriverState *bs;
4341
Kevin Wolf9ec88732016-09-21 14:56:11 +02004342 bs = bdrv_find_node(node_name);
4343 if (!bs) {
4344 error_setg(errp, "Cannot find node %s", node_name);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004345 return;
4346 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004347 if (bdrv_has_blk(bs)) {
4348 error_setg(errp, "Node %s is in use", node_name);
4349 return;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004350 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004351 aio_context = bdrv_get_aio_context(bs);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004352 aio_context_acquire(aio_context);
4353
Kevin Wolf9ec88732016-09-21 14:56:11 +02004354 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
4355 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004356 }
4357
Paolo Bonzini70537ed2018-12-06 23:00:09 +01004358 if (!QTAILQ_IN_USE(bs, monitor_list)) {
Kevin Wolf9ec88732016-09-21 14:56:11 +02004359 error_setg(errp, "Node %s is not owned by the monitor",
4360 bs->node_name);
4361 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004362 }
4363
Kevin Wolf9ec88732016-09-21 14:56:11 +02004364 if (bs->refcnt > 1) {
4365 error_setg(errp, "Block device %s is in use",
4366 bdrv_get_device_or_node_name(bs));
4367 goto out;
4368 }
4369
4370 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
4371 bdrv_unref(bs);
4372
Alberto Garcia81b936a2015-11-02 16:51:55 +02004373out:
4374 aio_context_release(aio_context);
4375}
4376
Wen Congyang7f821592016-05-10 15:36:39 +08004377static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs,
4378 const char *child_name)
4379{
4380 BdrvChild *child;
4381
4382 QLIST_FOREACH(child, &parent_bs->children, next) {
4383 if (strcmp(child->name, child_name) == 0) {
4384 return child;
4385 }
4386 }
4387
4388 return NULL;
4389}
4390
4391void qmp_x_blockdev_change(const char *parent, bool has_child,
4392 const char *child, bool has_node,
4393 const char *node, Error **errp)
4394{
4395 BlockDriverState *parent_bs, *new_bs = NULL;
4396 BdrvChild *p_child;
4397
4398 parent_bs = bdrv_lookup_bs(parent, parent, errp);
4399 if (!parent_bs) {
4400 return;
4401 }
4402
4403 if (has_child == has_node) {
4404 if (has_child) {
4405 error_setg(errp, "The parameters child and node are in conflict");
4406 } else {
4407 error_setg(errp, "Either child or node must be specified");
4408 }
4409 return;
4410 }
4411
4412 if (has_child) {
4413 p_child = bdrv_find_child(parent_bs, child);
4414 if (!p_child) {
4415 error_setg(errp, "Node '%s' does not have child '%s'",
4416 parent, child);
4417 return;
4418 }
4419 bdrv_del_child(parent_bs, p_child, errp);
4420 }
4421
4422 if (has_node) {
4423 new_bs = bdrv_find_node(node);
4424 if (!new_bs) {
4425 error_setg(errp, "Node '%s' not found", node);
4426 return;
4427 }
4428 bdrv_add_child(parent_bs, new_bs, errp);
4429 }
4430}
4431
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004432BlockJobInfoList *qmp_query_block_jobs(Error **errp)
4433{
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004434 BlockJobInfoList *head = NULL, **p_next = &head;
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004435 BlockJob *job;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004436
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004437 for (job = block_job_next(NULL); job; job = block_job_next(job)) {
John Snow559b9352016-10-27 12:06:55 -04004438 BlockJobInfoList *elem;
4439 AioContext *aio_context;
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004440
John Snow559b9352016-10-27 12:06:55 -04004441 if (block_job_is_internal(job)) {
4442 continue;
4443 }
4444 elem = g_new0(BlockJobInfoList, 1);
4445 aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004446 aio_context_acquire(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004447 elem->value = block_job_query(job, errp);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004448 aio_context_release(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004449 if (!elem->value) {
4450 g_free(elem);
4451 qapi_free_BlockJobInfoList(head);
4452 return NULL;
4453 }
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004454 *p_next = elem;
4455 p_next = &elem->next;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004456 }
4457
4458 return head;
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004459}
Paolo Bonzini4d454572012-11-26 16:03:42 +01004460
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004461void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread,
Stefan Hajnoczi882e9b82017-12-07 20:13:17 +00004462 bool has_force, bool force, Error **errp)
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004463{
4464 AioContext *old_context;
4465 AioContext *new_context;
4466 BlockDriverState *bs;
4467
4468 bs = bdrv_find_node(node_name);
4469 if (!bs) {
4470 error_setg(errp, "Cannot find node %s", node_name);
4471 return;
4472 }
4473
Stefan Hajnoczi882e9b82017-12-07 20:13:17 +00004474 /* Protects against accidents. */
4475 if (!(has_force && force) && bdrv_has_blk(bs)) {
4476 error_setg(errp, "Node %s is associated with a BlockBackend and could "
4477 "be in use (use force=true to override this check)",
4478 node_name);
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004479 return;
4480 }
4481
4482 if (iothread->type == QTYPE_QSTRING) {
4483 IOThread *obj = iothread_by_id(iothread->u.s);
4484 if (!obj) {
4485 error_setg(errp, "Cannot find iothread %s", iothread->u.s);
4486 return;
4487 }
4488
4489 new_context = iothread_get_aio_context(obj);
4490 } else {
4491 new_context = qemu_get_aio_context();
4492 }
4493
4494 old_context = bdrv_get_aio_context(bs);
4495 aio_context_acquire(old_context);
4496
4497 bdrv_set_aio_context(bs, new_context);
4498
4499 aio_context_release(old_context);
4500}
4501
Vladimir Sementsov-Ogievskiycb8aac32019-03-05 15:53:17 +03004502void qmp_block_latency_histogram_set(
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004503 const char *id,
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004504 bool has_boundaries, uint64List *boundaries,
4505 bool has_boundaries_read, uint64List *boundaries_read,
4506 bool has_boundaries_write, uint64List *boundaries_write,
4507 bool has_boundaries_flush, uint64List *boundaries_flush,
4508 Error **errp)
4509{
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004510 BlockBackend *blk = qmp_get_blk(NULL, id, errp);
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004511 BlockAcctStats *stats;
zhenwei pi63d53412018-11-05 11:04:56 +08004512 int ret;
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004513
4514 if (!blk) {
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004515 return;
4516 }
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004517
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004518 stats = blk_get_stats(blk);
4519
4520 if (!has_boundaries && !has_boundaries_read && !has_boundaries_write &&
4521 !has_boundaries_flush)
4522 {
4523 block_latency_histograms_clear(stats);
4524 return;
4525 }
4526
4527 if (has_boundaries || has_boundaries_read) {
zhenwei pi63d53412018-11-05 11:04:56 +08004528 ret = block_latency_histogram_set(
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004529 stats, BLOCK_ACCT_READ,
4530 has_boundaries_read ? boundaries_read : boundaries);
zhenwei pi63d53412018-11-05 11:04:56 +08004531 if (ret) {
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004532 error_setg(errp, "Device '%s' set read boundaries fail", id);
zhenwei pi63d53412018-11-05 11:04:56 +08004533 return;
4534 }
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004535 }
4536
4537 if (has_boundaries || has_boundaries_write) {
zhenwei pi63d53412018-11-05 11:04:56 +08004538 ret = block_latency_histogram_set(
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004539 stats, BLOCK_ACCT_WRITE,
4540 has_boundaries_write ? boundaries_write : boundaries);
zhenwei pi63d53412018-11-05 11:04:56 +08004541 if (ret) {
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004542 error_setg(errp, "Device '%s' set write boundaries fail", id);
zhenwei pi63d53412018-11-05 11:04:56 +08004543 return;
4544 }
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004545 }
4546
4547 if (has_boundaries || has_boundaries_flush) {
zhenwei pi63d53412018-11-05 11:04:56 +08004548 ret = block_latency_histogram_set(
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004549 stats, BLOCK_ACCT_FLUSH,
4550 has_boundaries_flush ? boundaries_flush : boundaries);
zhenwei pi63d53412018-11-05 11:04:56 +08004551 if (ret) {
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004552 error_setg(errp, "Device '%s' set flush boundaries fail", id);
zhenwei pi63d53412018-11-05 11:04:56 +08004553 return;
4554 }
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004555 }
4556}
4557
Kevin Wolf00063832013-03-15 10:35:07 +01004558QemuOptsList qemu_common_drive_opts = {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004559 .name = "drive",
Kevin Wolf00063832013-03-15 10:35:07 +01004560 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
Paolo Bonzini4d454572012-11-26 16:03:42 +01004561 .desc = {
4562 {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004563 .name = "snapshot",
4564 .type = QEMU_OPT_BOOL,
4565 .help = "enable/disable snapshot mode",
4566 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004567 .name = "aio",
4568 .type = QEMU_OPT_STRING,
4569 .help = "host AIO implementation (threads, native)",
4570 },{
Kevin Wolfe4b24b42016-03-15 15:39:42 +01004571 .name = BDRV_OPT_CACHE_WB,
4572 .type = QEMU_OPT_BOOL,
4573 .help = "Enable writeback mode",
4574 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004575 .name = "format",
4576 .type = QEMU_OPT_STRING,
4577 .help = "disk format (raw, qcow2, ...)",
4578 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004579 .name = "rerror",
4580 .type = QEMU_OPT_STRING,
4581 .help = "read error action",
4582 },{
4583 .name = "werror",
4584 .type = QEMU_OPT_STRING,
4585 .help = "write error action",
4586 },{
Alberto Garcia4e200cf2016-09-15 17:53:05 +03004587 .name = BDRV_OPT_READ_ONLY,
Paolo Bonzini4d454572012-11-26 16:03:42 +01004588 .type = QEMU_OPT_BOOL,
4589 .help = "open drive file as read-only",
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +01004590 },
4591
4592 THROTTLE_OPTS,
4593
4594 {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02004595 .name = "throttling.group",
4596 .type = QEMU_OPT_STRING,
4597 .help = "name of the block throttling group",
4598 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004599 .name = "copy-on-read",
4600 .type = QEMU_OPT_BOOL,
4601 .help = "copy read data from backing file into image file",
Peter Lieven465bee12014-05-18 00:58:19 +02004602 },{
4603 .name = "detect-zeroes",
4604 .type = QEMU_OPT_STRING,
4605 .help = "try to optimize zero writes (off, on, unmap)",
Alberto Garcia362e9292015-10-28 17:33:04 +02004606 },{
4607 .name = "stats-account-invalid",
4608 .type = QEMU_OPT_BOOL,
4609 .help = "whether to account for invalid I/O operations "
4610 "in the statistics",
4611 },{
4612 .name = "stats-account-failed",
4613 .type = QEMU_OPT_BOOL,
4614 .help = "whether to account for failed I/O operations "
4615 "in the statistics",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004616 },
4617 { /* end of list */ }
4618 },
4619};
Kevin Wolf00063832013-03-15 10:35:07 +01004620
4621QemuOptsList qemu_drive_opts = {
4622 .name = "drive",
4623 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4624 .desc = {
Kevin Wolf492fdc62013-06-19 13:44:17 +02004625 /*
4626 * no elements => accept any params
4627 * validation will happen later
4628 */
Kevin Wolf00063832013-03-15 10:35:07 +01004629 { /* end of list */ }
4630 },
4631};