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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"
Markus Armbrustercdcd4362019-04-17 21:06:38 +020043#include "qemu/qemu-print.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010044#include "qemu/config-file.h"
Markus Armbruster9af23982018-02-11 10:36:01 +010045#include "qapi/qapi-commands-block.h"
46#include "qapi/qapi-commands-transaction.h"
47#include "qapi/qapi-visit-block-core.h"
Markus Armbruster452fcdb2018-02-01 12:18:39 +010048#include "qapi/qmp/qdict.h"
Markus Armbruster15280c32018-02-01 12:18:36 +010049#include "qapi/qmp/qnum.h"
Markus Armbruster6b673952018-02-01 12:18:35 +010050#include "qapi/qmp/qstring.h"
Markus Armbrustere688df62018-02-01 12:18:31 +010051#include "qapi/error.h"
Markus Armbrustercc7a8ea2015-03-17 17:22:46 +010052#include "qapi/qmp/qerror.h"
Markus Armbruster47e6b292018-02-01 12:18:38 +010053#include "qapi/qmp/qlist.h"
Daniel P. Berrangeb3db2112016-09-30 15:45:27 +010054#include "qapi/qobject-output-visitor.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010055#include "sysemu/sysemu.h"
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +000056#include "sysemu/iothread.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010057#include "block/block_int.h"
Daniel P. Berrange0ab8ed12017-01-25 16:14:15 +000058#include "block/trace.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010059#include "sysemu/arch_init.h"
Thomas Huthc616f162017-05-12 12:33:49 +020060#include "sysemu/qtest.h"
Veronia Bahaaf348b6d2016-03-20 19:16:19 +020061#include "qemu/cutils.h"
62#include "qemu/help_option.h"
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +010063#include "qemu/throttle-options.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020064
Max Reitz9c4218e2016-01-29 16:36:12 +010065static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
66 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
67
Kevin Wolfb33945c2016-09-20 13:38:43 +020068static int do_open_tray(const char *blk_name, const char *qdev_id,
69 bool force, Error **errp);
Max Reitz82fcf662017-11-10 23:43:01 +010070static void blockdev_remove_medium(bool has_device, const char *device,
71 bool has_id, const char *id, Error **errp);
72static void blockdev_insert_medium(bool has_device, const char *device,
73 bool has_id, const char *id,
74 const char *node_name, Error **errp);
Colin Lordbf18bee2016-06-06 14:15:22 -040075
Markus Armbruster19609662011-01-28 11:21:39 +010076static const char *const if_name[IF_COUNT] = {
77 [IF_NONE] = "none",
78 [IF_IDE] = "ide",
79 [IF_SCSI] = "scsi",
80 [IF_FLOPPY] = "floppy",
81 [IF_PFLASH] = "pflash",
82 [IF_MTD] = "mtd",
83 [IF_SD] = "sd",
84 [IF_VIRTIO] = "virtio",
85 [IF_XEN] = "xen",
86};
87
John Snow21dff8c2014-10-01 14:19:25 -040088static int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010089 /*
90 * Do not change these numbers! They govern how drive option
91 * index maps to unit and bus. That mapping is ABI.
92 *
Wei Jiangang547cb152016-04-26 18:12:43 +080093 * All controllers used to implement if=T drives need to support
Markus Armbruster27d6bf42011-01-28 11:21:40 +010094 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
95 * Otherwise, some index values map to "impossible" bus, unit
96 * values.
97 *
98 * For instance, if you change [IF_SCSI] to 255, -drive
99 * if=scsi,index=12 no longer means bus=1,unit=5, but
100 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
101 * the drive can't be set up. Regression.
102 */
103 [IF_IDE] = 2,
104 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +0100105};
106
John Snow21dff8c2014-10-01 14:19:25 -0400107/**
108 * Boards may call this to offer board-by-board overrides
109 * of the default, global values.
110 */
111void override_max_devs(BlockInterfaceType type, int max_devs)
112{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200113 BlockBackend *blk;
John Snow21dff8c2014-10-01 14:19:25 -0400114 DriveInfo *dinfo;
115
116 if (max_devs <= 0) {
117 return;
118 }
119
Markus Armbruster18e46a02014-10-07 13:59:06 +0200120 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
121 dinfo = blk_legacy_dinfo(blk);
John Snow21dff8c2014-10-01 14:19:25 -0400122 if (dinfo->type == type) {
123 fprintf(stderr, "Cannot override units-per-bus property of"
124 " the %s interface, because a drive of that type has"
125 " already been added.\n", if_name[type]);
126 g_assert_not_reached();
127 }
128 }
129
130 if_max_devs[type] = max_devs;
131}
132
Markus Armbruster14bafc52010-06-25 08:09:10 +0200133/*
134 * We automatically delete the drive when a device using it gets
135 * unplugged. Questionable feature, but we can't just drop it.
136 * Device models call blockdev_mark_auto_del() to schedule the
137 * automatic deletion, and generic qdev code calls blockdev_auto_del()
138 * when deletion is actually safe.
139 */
Markus Armbruster4be74632014-10-07 13:59:18 +0200140void blockdev_mark_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200141{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200142 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster4be74632014-10-07 13:59:18 +0200143 BlockDriverState *bs = blk_bs(blk);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100144 AioContext *aio_context;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200145
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200146 if (!dinfo) {
Kevin Wolf2d246f02013-09-18 15:14:47 +0200147 return;
148 }
149
Max Reitz5433c242015-10-19 17:53:29 +0200150 if (bs) {
151 aio_context = bdrv_get_aio_context(bs);
152 aio_context_acquire(aio_context);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100153
Max Reitz5433c242015-10-19 17:53:29 +0200154 if (bs->job) {
Kevin Wolf3d70ff52018-04-24 16:13:52 +0200155 job_cancel(&bs->job->job, false);
Max Reitz5433c242015-10-19 17:53:29 +0200156 }
157
158 aio_context_release(aio_context);
Paolo Bonzini12bde0e2012-03-30 13:17:10 +0200159 }
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100160
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200161 dinfo->auto_del = 1;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200162}
163
Markus Armbruster4be74632014-10-07 13:59:18 +0200164void blockdev_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200165{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200166 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200167
Ryan Harper0fc0f1f2010-12-08 10:05:00 -0600168 if (dinfo && dinfo->auto_del) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100169 monitor_remove_blk(blk);
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +0200170 blk_unref(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200171 }
172}
173
John Snowd8f94e12014-10-01 14:19:27 -0400174/**
175 * Returns the current mapping of how many units per bus
176 * a particular interface can support.
177 *
178 * A positive integer indicates n units per bus.
179 * 0 implies the mapping has not been established.
180 * -1 indicates an invalid BlockInterfaceType was given.
181 */
182int drive_get_max_devs(BlockInterfaceType type)
183{
184 if (type >= IF_IDE && type < IF_COUNT) {
185 return if_max_devs[type];
186 }
187
188 return -1;
189}
190
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100191static int drive_index_to_bus_id(BlockInterfaceType type, int index)
192{
193 int max_devs = if_max_devs[type];
194 return max_devs ? index / max_devs : 0;
195}
196
197static int drive_index_to_unit_id(BlockInterfaceType type, int index)
198{
199 int max_devs = if_max_devs[type];
200 return max_devs ? index % max_devs : index;
201}
202
Markus Armbruster2292dda2011-01-28 11:21:41 +0100203QemuOpts *drive_def(const char *optstr)
204{
Markus Armbruster70b94332015-02-13 12:50:26 +0100205 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100206}
207
208QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100209 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200210{
Markus Armbruster666daa62010-06-02 18:48:27 +0200211 QemuOpts *opts;
212
Markus Armbruster2292dda2011-01-28 11:21:41 +0100213 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200214 if (!opts) {
215 return NULL;
216 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100217 if (type != IF_DEFAULT) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100218 qemu_opt_set(opts, "if", if_name[type], &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100219 }
220 if (index >= 0) {
Markus Armbrustera8b18f82015-02-13 15:50:43 +0100221 qemu_opt_set_number(opts, "index", index, &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100222 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200223 if (file)
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100224 qemu_opt_set(opts, "file", file, &error_abort);
Markus Armbruster666daa62010-06-02 18:48:27 +0200225 return opts;
226}
227
228DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
229{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200230 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200231 DriveInfo *dinfo;
232
Markus Armbruster18e46a02014-10-07 13:59:06 +0200233 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
234 dinfo = blk_legacy_dinfo(blk);
235 if (dinfo && dinfo->type == type
236 && dinfo->bus == bus && dinfo->unit == unit) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200237 return dinfo;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200238 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200239 }
240
241 return NULL;
242}
243
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100244void drive_check_orphaned(void)
John Snowa66c9dc2014-10-01 14:19:24 -0400245{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200246 BlockBackend *blk;
John Snowa66c9dc2014-10-01 14:19:24 -0400247 DriveInfo *dinfo;
Markus Armbruster664cc622017-02-15 11:05:45 +0100248 Location loc;
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100249 bool orphans = false;
John Snowa66c9dc2014-10-01 14:19:24 -0400250
Markus Armbruster18e46a02014-10-07 13:59:06 +0200251 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
252 dinfo = blk_legacy_dinfo(blk);
Markus Armbrustera7f53e22014-10-07 13:59:25 +0200253 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
John Snowa66c9dc2014-10-01 14:19:24 -0400254 dinfo->type != IF_NONE) {
Markus Armbruster664cc622017-02-15 11:05:45 +0100255 loc_push_none(&loc);
256 qemu_opts_loc_restore(dinfo->opts);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100257 error_report("machine type does not support"
Markus Armbruster664cc622017-02-15 11:05:45 +0100258 " if=%s,bus=%d,unit=%d",
259 if_name[dinfo->type], dinfo->bus, dinfo->unit);
260 loc_pop(&loc);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100261 orphans = true;
John Snowa66c9dc2014-10-01 14:19:24 -0400262 }
263 }
264
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100265 if (orphans) {
266 exit(1);
267 }
John Snowa66c9dc2014-10-01 14:19:24 -0400268}
269
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100270DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
271{
272 return drive_get(type,
273 drive_index_to_bus_id(type, index),
274 drive_index_to_unit_id(type, index));
275}
276
Markus Armbruster666daa62010-06-02 18:48:27 +0200277int drive_get_max_bus(BlockInterfaceType type)
278{
279 int max_bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200280 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200281 DriveInfo *dinfo;
282
283 max_bus = -1;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200284 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
285 dinfo = blk_legacy_dinfo(blk);
286 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200287 max_bus = dinfo->bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200288 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200289 }
290 return max_bus;
291}
292
Markus Armbruster13839972011-01-28 11:21:37 +0100293/* Get a block device. This should only be used for single-drive devices
294 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
295 appropriate bus. */
296DriveInfo *drive_get_next(BlockInterfaceType type)
297{
298 static int next_block_unit[IF_COUNT];
299
300 return drive_get(type, 0, next_block_unit[type]++);
301}
302
Markus Armbruster666daa62010-06-02 18:48:27 +0200303static void bdrv_format_print(void *opaque, const char *name)
304{
Markus Armbrustercdcd4362019-04-17 21:06:38 +0200305 qemu_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200306}
307
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000308typedef struct {
309 QEMUBH *bh;
Fam Zhengfa510eb2013-08-23 09:14:51 +0800310 BlockDriverState *bs;
311} BDRVPutRefBH;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000312
Kevin Wolfb6810722013-09-20 11:33:11 +0200313static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200314{
315 if (!strcmp(buf, "ignore")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200316 return BLOCKDEV_ON_ERROR_IGNORE;
Markus Armbruster666daa62010-06-02 18:48:27 +0200317 } else if (!is_read && !strcmp(buf, "enospc")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200318 return BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200319 } else if (!strcmp(buf, "stop")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200320 return BLOCKDEV_ON_ERROR_STOP;
Markus Armbruster666daa62010-06-02 18:48:27 +0200321 } else if (!strcmp(buf, "report")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200322 return BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200323 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200324 error_setg(errp, "'%s' invalid %s error action",
325 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200326 return -1;
327 }
328}
329
Alberto Garcia40119ef2015-11-16 11:28:38 +0200330static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
331 Error **errp)
332{
333 const QListEntry *entry;
334 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
335 switch (qobject_type(entry->value)) {
336
337 case QTYPE_QSTRING: {
338 unsigned long long length;
Max Reitz7dc847e2018-02-24 16:40:29 +0100339 const char *str = qstring_get_str(qobject_to(QString,
340 entry->value));
Alberto Garcia40119ef2015-11-16 11:28:38 +0200341 if (parse_uint_full(str, &length, 10) == 0 &&
342 length > 0 && length <= UINT_MAX) {
343 block_acct_add_interval(stats, (unsigned) length);
344 } else {
345 error_setg(errp, "Invalid interval length: %s", str);
346 return false;
347 }
348 break;
349 }
350
Marc-André Lureau01b2ffc2017-06-07 20:35:58 +0400351 case QTYPE_QNUM: {
Max Reitz7dc847e2018-02-24 16:40:29 +0100352 int64_t length = qnum_get_int(qobject_to(QNum, entry->value));
Marc-André Lureau01b2ffc2017-06-07 20:35:58 +0400353
Alberto Garcia40119ef2015-11-16 11:28:38 +0200354 if (length > 0 && length <= UINT_MAX) {
355 block_acct_add_interval(stats, (unsigned) length);
356 } else {
357 error_setg(errp, "Invalid interval length: %" PRId64, length);
358 return false;
359 }
360 break;
361 }
362
363 default:
364 error_setg(errp, "The specification of stats-intervals is invalid");
365 return false;
366 }
367 }
368 return true;
369}
370
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200371typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
372
Max Reitzfbf81752015-10-19 17:53:31 +0200373/* All parameters but @opts are optional and may be set to NULL. */
374static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
375 const char **throttling_group, ThrottleConfig *throttle_cfg,
376 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
377{
Max Reitzfbf81752015-10-19 17:53:31 +0200378 Error *local_error = NULL;
379 const char *aio;
380
381 if (bdrv_flags) {
Max Reitzfbf81752015-10-19 17:53:31 +0200382 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
383 *bdrv_flags |= BDRV_O_COPY_ON_READ;
384 }
385
Max Reitzfbf81752015-10-19 17:53:31 +0200386 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
387 if (!strcmp(aio, "native")) {
388 *bdrv_flags |= BDRV_O_NATIVE_AIO;
389 } else if (!strcmp(aio, "threads")) {
390 /* this is the default */
391 } else {
392 error_setg(errp, "invalid aio option");
393 return;
394 }
395 }
396 }
397
398 /* disk I/O throttling */
399 if (throttling_group) {
400 *throttling_group = qemu_opt_get(opts, "throttling.group");
401 }
402
403 if (throttle_cfg) {
Alberto Garcia1588ab52016-02-18 12:27:00 +0200404 throttle_config_init(throttle_cfg);
Max Reitzfbf81752015-10-19 17:53:31 +0200405 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
406 qemu_opt_get_number(opts, "throttling.bps-total", 0);
407 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
408 qemu_opt_get_number(opts, "throttling.bps-read", 0);
409 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
410 qemu_opt_get_number(opts, "throttling.bps-write", 0);
411 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
412 qemu_opt_get_number(opts, "throttling.iops-total", 0);
413 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
414 qemu_opt_get_number(opts, "throttling.iops-read", 0);
415 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
416 qemu_opt_get_number(opts, "throttling.iops-write", 0);
417
418 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
419 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
420 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
421 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
422 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
423 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
424 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
425 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
426 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
427 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
428 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
429 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
430
Alberto Garcia8a0fc182016-02-18 12:27:02 +0200431 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
432 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
433 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
434 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
435 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
436 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
437 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
438 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
439 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
440 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
441 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
442 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
443
Max Reitzfbf81752015-10-19 17:53:31 +0200444 throttle_cfg->op_size =
445 qemu_opt_get_number(opts, "throttling.iops-size", 0);
446
Alberto Garciad5851082016-02-18 12:26:59 +0200447 if (!throttle_is_valid(throttle_cfg, errp)) {
Max Reitzfbf81752015-10-19 17:53:31 +0200448 return;
449 }
450 }
451
452 if (detect_zeroes) {
453 *detect_zeroes =
Marc-André Lureauf7abe0e2017-08-24 10:46:10 +0200454 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup,
Max Reitzfbf81752015-10-19 17:53:31 +0200455 qemu_opt_get(opts, "detect-zeroes"),
Max Reitzfbf81752015-10-19 17:53:31 +0200456 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
457 &local_error);
458 if (local_error) {
459 error_propagate(errp, local_error);
460 return;
461 }
Max Reitzfbf81752015-10-19 17:53:31 +0200462 }
463}
464
Kevin Wolff298d072013-09-10 12:01:20 +0200465/* Takes the ownership of bs_opts */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200466static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
467 Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200468{
469 const char *buf;
Markus Armbruster666daa62010-06-02 18:48:27 +0200470 int bdrv_flags = 0;
471 int on_read_error, on_write_error;
Alberto Garcia362e9292015-10-28 17:33:04 +0200472 bool account_invalid, account_failed;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300473 bool writethrough, read_only;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200474 BlockBackend *blk;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200475 BlockDriverState *bs;
Benoît Canetcc0681c2013-09-02 14:14:39 +0200476 ThrottleConfig cfg;
Markus Armbruster666daa62010-06-02 18:48:27 +0200477 int snapshot = 0;
Stefan Hajnoczic5461942013-02-13 16:53:42 +0100478 Error *error = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100479 QemuOpts *opts;
Alberto Garcia40119ef2015-11-16 11:28:38 +0200480 QDict *interval_dict = NULL;
481 QList *interval_list = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100482 const char *id;
Max Reitzfbf81752015-10-19 17:53:31 +0200483 BlockdevDetectZeroesOptions detect_zeroes =
484 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
485 const char *throttling_group = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200486
Kevin Wolff298d072013-09-10 12:01:20 +0200487 /* Check common options by copying from bs_opts to opts, all other options
488 * stay in bs_opts for processing by bdrv_open(). */
489 id = qdict_get_try_str(bs_opts, "id");
Kevin Wolf00063832013-03-15 10:35:07 +0100490 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100491 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200492 error_propagate(errp, error);
Markus Armbruster6376f952014-05-28 11:17:01 +0200493 goto err_no_opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100494 }
495
Kevin Wolf00063832013-03-15 10:35:07 +0100496 qemu_opts_absorb_qdict(opts, bs_opts, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100497 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200498 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100499 goto early_err;
Kevin Wolf00063832013-03-15 10:35:07 +0100500 }
501
502 if (id) {
503 qdict_del(bs_opts, "id");
504 }
505
Markus Armbruster666daa62010-06-02 18:48:27 +0200506 /* extract parameters */
Markus Armbruster666daa62010-06-02 18:48:27 +0200507 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
Markus Armbruster666daa62010-06-02 18:48:27 +0200508
Alberto Garcia362e9292015-10-28 17:33:04 +0200509 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
510 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
511
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100512 writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
513
Alberto Garciaff356ee2016-07-08 17:03:00 +0300514 id = qemu_opts_id(opts);
515
Alberto Garcia40119ef2015-11-16 11:28:38 +0200516 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
517 qdict_array_split(interval_dict, &interval_list);
518
519 if (qdict_size(interval_dict) != 0) {
520 error_setg(errp, "Invalid option stats-intervals.%s",
521 qdict_first(interval_dict)->key);
522 goto early_err;
523 }
Alberto Garcia2be55062015-10-28 17:33:07 +0200524
Max Reitzfbf81752015-10-19 17:53:31 +0200525 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
526 &detect_zeroes, &error);
527 if (error) {
528 error_propagate(errp, error);
529 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200530 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200531
532 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
Peter Maydellc8057f92012-08-02 13:45:54 +0100533 if (is_help_option(buf)) {
Markus Armbrustercdcd4362019-04-17 21:06:38 +0200534 qemu_printf("Supported formats:");
Andrey Shinkevich9ac404c2019-03-07 16:33:58 +0300535 bdrv_iterate_format(bdrv_format_print, NULL, false);
Markus Armbrustercdcd4362019-04-17 21:06:38 +0200536 qemu_printf("\nSupported formats (read-only):");
Andrey Shinkevich9ac404c2019-03-07 16:33:58 +0300537 bdrv_iterate_format(bdrv_format_print, NULL, true);
Markus Armbrustercdcd4362019-04-17 21:06:38 +0200538 qemu_printf("\n");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100539 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200540 }
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200541
Max Reitze4342ce2015-02-05 13:58:14 -0500542 if (qdict_haskey(bs_opts, "driver")) {
543 error_setg(errp, "Cannot specify both 'driver' and 'format'");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100544 goto early_err;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400545 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500546 qdict_put_str(bs_opts, "driver", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200547 }
548
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200549 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200550 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200551 on_write_error = parse_block_error_action(buf, 0, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100552 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200553 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100554 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200555 }
556 }
557
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200558 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200559 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200560 on_read_error = parse_block_error_action(buf, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100561 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200562 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100563 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200564 }
565 }
566
Max Reitz5ec18f82015-10-19 17:53:30 +0200567 if (snapshot) {
Kevin Wolf91a097e2015-05-08 17:49:53 +0200568 bdrv_flags |= BDRV_O_SNAPSHOT;
Max Reitz5ec18f82015-10-19 17:53:30 +0200569 }
570
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300571 read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false);
572
Kevin Wolf326642b2013-07-11 12:52:34 +0200573 /* init */
Kevin Wolf39c4ae92015-11-13 14:45:42 +0100574 if ((!file || !*file) && !qdict_size(bs_opts)) {
Max Reitz5ec18f82015-10-19 17:53:30 +0200575 BlockBackendRootState *blk_rs;
576
Kevin Wolf6d0eb642017-01-20 17:07:26 +0100577 blk = blk_new(0, BLK_PERM_ALL);
Max Reitz5ec18f82015-10-19 17:53:30 +0200578 blk_rs = blk_get_root_state(blk);
579 blk_rs->open_flags = bdrv_flags;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300580 blk_rs->read_only = read_only;
Max Reitz5ec18f82015-10-19 17:53:30 +0200581 blk_rs->detect_zeroes = detect_zeroes;
582
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200583 qobject_unref(bs_opts);
Max Reitze4342ce2015-02-05 13:58:14 -0500584 } else {
585 if (file && !*file) {
586 file = NULL;
587 }
588
Kevin Wolf91a097e2015-05-08 17:49:53 +0200589 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
590 * with other callers) rather than what we want as the real defaults.
591 * Apply the defaults here instead. */
Kevin Wolf91a097e2015-05-08 17:49:53 +0200592 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
593 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300594 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY,
595 read_only ? "on" : "off");
Kevin Wolf9384a442018-10-17 18:24:30 +0200596 qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on");
Kevin Wolf72e775c2016-03-15 14:34:37 +0100597 assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
Kevin Wolf91a097e2015-05-08 17:49:53 +0200598
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100599 if (runstate_check(RUN_STATE_INMIGRATE)) {
600 bdrv_flags |= BDRV_O_INACTIVE;
601 }
602
Max Reitzefaa7c42016-03-16 19:54:38 +0100603 blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
Max Reitze4342ce2015-02-05 13:58:14 -0500604 if (!blk) {
605 goto err_no_bs_opts;
606 }
607 bs = blk_bs(blk);
Max Reitze4342ce2015-02-05 13:58:14 -0500608
Max Reitz5ec18f82015-10-19 17:53:30 +0200609 bs->detect_zeroes = detect_zeroes;
610
Paolo Bonzini9caa6f32017-06-05 14:39:07 +0200611 block_acct_setup(blk_get_stats(blk), account_invalid, account_failed);
Alberto Garcia2be55062015-10-28 17:33:07 +0200612
Alberto Garcia40119ef2015-11-16 11:28:38 +0200613 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
614 blk_unref(blk);
615 blk = NULL;
616 goto err_no_bs_opts;
Alberto Garcia2be55062015-10-28 17:33:07 +0200617 }
Max Reitz5ec18f82015-10-19 17:53:30 +0200618 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200619
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100620 /* disk I/O throttling */
621 if (throttle_enabled(&cfg)) {
622 if (!throttling_group) {
Alberto Garciaff356ee2016-07-08 17:03:00 +0300623 throttling_group = id;
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100624 }
625 blk_io_limits_enable(blk, throttling_group);
626 blk_set_io_limits(blk, &cfg);
627 }
628
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100629 blk_set_enable_write_cache(blk, !writethrough);
Max Reitz373340b2015-10-19 17:53:22 +0200630 blk_set_on_error(blk, on_read_error, on_write_error);
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200631
Alberto Garciaff356ee2016-07-08 17:03:00 +0300632 if (!monitor_add_blk(blk, id, errp)) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100633 blk_unref(blk);
634 blk = NULL;
635 goto err_no_bs_opts;
636 }
637
Max Reitze4342ce2015-02-05 13:58:14 -0500638err_no_bs_opts:
Kevin Wolf00063832013-03-15 10:35:07 +0100639 qemu_opts_del(opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200640 qobject_unref(interval_dict);
641 qobject_unref(interval_list);
Markus Armbruster18e46a02014-10-07 13:59:06 +0200642 return blk;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100643
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100644early_err:
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100645 qemu_opts_del(opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200646 qobject_unref(interval_dict);
647 qobject_unref(interval_list);
Markus Armbruster6376f952014-05-28 11:17:01 +0200648err_no_opts:
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200649 qobject_unref(bs_opts);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100650 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200651}
652
Max Reitzbd745e22015-10-19 17:53:32 +0200653/* Takes the ownership of bs_opts */
654static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
655{
Max Reitzbd745e22015-10-19 17:53:32 +0200656 int bdrv_flags = 0;
657
Kevin Wolfa81d6162016-03-07 14:23:04 +0100658 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
659 * with other callers) rather than what we want as the real defaults.
660 * Apply the defaults here instead. */
Kevin Wolfa81d6162016-03-07 14:23:04 +0100661 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
662 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300663 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off");
Kevin Wolfa81d6162016-03-07 14:23:04 +0100664
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100665 if (runstate_check(RUN_STATE_INMIGRATE)) {
666 bdrv_flags |= BDRV_O_INACTIVE;
667 }
668
Kevin Wolf74e1ae72016-09-20 20:48:52 +0200669 return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
Max Reitzbd745e22015-10-19 17:53:32 +0200670}
671
Max Reitz9c4218e2016-01-29 16:36:12 +0100672void blockdev_close_all_bdrv_states(void)
673{
674 BlockDriverState *bs, *next_bs;
675
676 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
677 AioContext *ctx = bdrv_get_aio_context(bs);
678
679 aio_context_acquire(ctx);
680 bdrv_unref(bs);
681 aio_context_release(ctx);
682 }
683}
684
Max Reitz262b4e82016-03-16 19:54:41 +0100685/* Iterates over the list of monitor-owned BlockDriverStates */
686BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
687{
688 return bs ? QTAILQ_NEXT(bs, monitor_list)
689 : QTAILQ_FIRST(&monitor_bdrv_states);
690}
691
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200692static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
693 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200694{
695 const char *value;
696
697 value = qemu_opt_get(opts, from);
698 if (value) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200699 if (qemu_opt_find(opts, to)) {
700 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
701 "same time", to, from);
702 return;
703 }
Jun Li20d6cd42014-09-24 13:45:27 +0800704 }
705
706 /* rename all items in opts */
707 while ((value = qemu_opt_get(opts, from))) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100708 qemu_opt_set(opts, to, value, &error_abort);
Kevin Wolf57975222013-07-17 14:41:54 +0200709 qemu_opt_unset(opts, from);
710 }
711}
712
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200713QemuOptsList qemu_legacy_drive_opts = {
714 .name = "drive",
715 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
716 .desc = {
717 {
Kevin Wolf87a899c2013-09-10 15:48:13 +0200718 .name = "bus",
719 .type = QEMU_OPT_NUMBER,
720 .help = "bus number",
721 },{
722 .name = "unit",
723 .type = QEMU_OPT_NUMBER,
724 .help = "unit number (i.e. lun for scsi)",
725 },{
726 .name = "index",
727 .type = QEMU_OPT_NUMBER,
728 .help = "index number",
729 },{
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200730 .name = "media",
731 .type = QEMU_OPT_STRING,
732 .help = "media type (disk, cdrom)",
Kevin Wolf593d4642013-08-28 17:24:51 +0200733 },{
734 .name = "if",
735 .type = QEMU_OPT_STRING,
736 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
Kevin Wolfb41a7332013-09-09 16:49:49 +0200737 },{
Max Reitzd095b462013-12-20 19:28:14 +0100738 .name = "file",
739 .type = QEMU_OPT_STRING,
740 .help = "file name",
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200741 },
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200742
743 /* Options that are passed on, but have special semantics with -drive */
744 {
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300745 .name = BDRV_OPT_READ_ONLY,
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200746 .type = QEMU_OPT_BOOL,
747 .help = "open drive file as read-only",
748 },{
Kevin Wolfee13ed12014-02-09 09:52:32 +0100749 .name = "rerror",
750 .type = QEMU_OPT_STRING,
751 .help = "read error action",
752 },{
753 .name = "werror",
754 .type = QEMU_OPT_STRING,
755 .help = "write error action",
756 },{
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200757 .name = "copy-on-read",
758 .type = QEMU_OPT_BOOL,
759 .help = "copy read data from backing file into image file",
760 },
761
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200762 { /* end of list */ }
763 },
764};
765
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200766DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type,
767 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200768{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200769 const char *value;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200770 BlockBackend *blk;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200771 DriveInfo *dinfo = NULL;
Kevin Wolff298d072013-09-10 12:01:20 +0200772 QDict *bs_opts;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200773 QemuOpts *legacy_opts;
774 DriveMediaType media = MEDIA_DISK;
Kevin Wolf593d4642013-08-28 17:24:51 +0200775 BlockInterfaceType type;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200776 int max_devs, bus_id, unit_id, index;
Kevin Wolfee13ed12014-02-09 09:52:32 +0100777 const char *werror, *rerror;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800778 bool read_only = false;
779 bool copy_on_read;
Max Reitzd095b462013-12-20 19:28:14 +0100780 const char *filename;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200781 Error *local_err = NULL;
Kevin Wolf247147f2014-09-24 16:37:14 +0200782 int i;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200783
Kevin Wolf57975222013-07-17 14:41:54 +0200784 /* Change legacy command line options into QMP ones */
Kevin Wolf247147f2014-09-24 16:37:14 +0200785 static const struct {
786 const char *from;
787 const char *to;
788 } opt_renames[] = {
789 { "iops", "throttling.iops-total" },
790 { "iops_rd", "throttling.iops-read" },
791 { "iops_wr", "throttling.iops-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200792
Kevin Wolf247147f2014-09-24 16:37:14 +0200793 { "bps", "throttling.bps-total" },
794 { "bps_rd", "throttling.bps-read" },
795 { "bps_wr", "throttling.bps-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200796
Kevin Wolf247147f2014-09-24 16:37:14 +0200797 { "iops_max", "throttling.iops-total-max" },
798 { "iops_rd_max", "throttling.iops-read-max" },
799 { "iops_wr_max", "throttling.iops-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200800
Kevin Wolf247147f2014-09-24 16:37:14 +0200801 { "bps_max", "throttling.bps-total-max" },
802 { "bps_rd_max", "throttling.bps-read-max" },
803 { "bps_wr_max", "throttling.bps-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200804
Kevin Wolf247147f2014-09-24 16:37:14 +0200805 { "iops_size", "throttling.iops-size" },
Benoît Canet2024c1d2013-09-02 14:14:41 +0200806
Alberto Garcia76f4afb2015-06-08 18:17:44 +0200807 { "group", "throttling.group" },
808
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300809 { "readonly", BDRV_OPT_READ_ONLY },
Kevin Wolf247147f2014-09-24 16:37:14 +0200810 };
811
812 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200813 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
814 &local_err);
815 if (local_err) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200816 error_propagate(errp, local_err);
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200817 return NULL;
818 }
Kevin Wolf247147f2014-09-24 16:37:14 +0200819 }
Kevin Wolf0f227a92013-07-19 20:07:29 +0200820
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200821 value = qemu_opt_get(all_opts, "cache");
822 if (value) {
823 int flags = 0;
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100824 bool writethrough;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200825
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100826 if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200827 error_setg(errp, "invalid cache option");
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200828 return NULL;
829 }
830
831 /* Specific options take precedence */
Kevin Wolf54861b92015-04-07 16:55:00 +0200832 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
833 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100834 !writethrough, &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200835 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200836 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
837 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100838 !!(flags & BDRV_O_NOCACHE), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200839 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200840 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
841 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100842 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200843 }
844 qemu_opt_unset(all_opts, "cache");
845 }
846
Kevin Wolff298d072013-09-10 12:01:20 +0200847 /* Get a QDict for processing the options */
848 bs_opts = qdict_new();
849 qemu_opts_to_qdict(all_opts, bs_opts);
850
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800851 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
852 &error_abort);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200853 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100854 if (local_err) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200855 error_propagate(errp, local_err);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200856 goto fail;
857 }
858
859 /* Media type */
860 value = qemu_opt_get(legacy_opts, "media");
861 if (value) {
862 if (!strcmp(value, "disk")) {
863 media = MEDIA_DISK;
864 } else if (!strcmp(value, "cdrom")) {
865 media = MEDIA_CDROM;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800866 read_only = true;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200867 } else {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200868 error_setg(errp, "'%s' invalid media", value);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200869 goto fail;
870 }
871 }
872
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200873 /* copy-on-read is disabled with a warning for read-only devices */
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300874 read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false);
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200875 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
876
877 if (read_only && copy_on_read) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700878 warn_report("disabling copy-on-read on read-only drive");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200879 copy_on_read = false;
880 }
881
Eric Blake46f5ac22017-04-27 16:58:17 -0500882 qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off");
883 qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200884
Kevin Wolf593d4642013-08-28 17:24:51 +0200885 /* Controller type */
886 value = qemu_opt_get(legacy_opts, "if");
887 if (value) {
888 for (type = 0;
889 type < IF_COUNT && strcmp(value, if_name[type]);
890 type++) {
891 }
892 if (type == IF_COUNT) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200893 error_setg(errp, "unsupported bus type '%s'", value);
Kevin Wolf593d4642013-08-28 17:24:51 +0200894 goto fail;
895 }
896 } else {
897 type = block_default_type;
898 }
899
Kevin Wolf87a899c2013-09-10 15:48:13 +0200900 /* Device address specified by bus/unit or index.
901 * If none was specified, try to find the first free one. */
902 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
903 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
904 index = qemu_opt_get_number(legacy_opts, "index", -1);
905
906 max_devs = if_max_devs[type];
907
908 if (index != -1) {
909 if (bus_id != 0 || unit_id != -1) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200910 error_setg(errp, "index cannot be used with bus and unit");
Kevin Wolf87a899c2013-09-10 15:48:13 +0200911 goto fail;
912 }
913 bus_id = drive_index_to_bus_id(type, index);
914 unit_id = drive_index_to_unit_id(type, index);
915 }
916
917 if (unit_id == -1) {
918 unit_id = 0;
919 while (drive_get(type, bus_id, unit_id) != NULL) {
920 unit_id++;
921 if (max_devs && unit_id >= max_devs) {
922 unit_id -= max_devs;
923 bus_id++;
924 }
925 }
926 }
927
928 if (max_devs && unit_id >= max_devs) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200929 error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200930 goto fail;
931 }
932
933 if (drive_get(type, bus_id, unit_id) != NULL) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200934 error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists",
935 bus_id, unit_id, index);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200936 goto fail;
937 }
938
939 /* no id supplied -> create one */
940 if (qemu_opts_id(all_opts) == NULL) {
941 char *new_id;
942 const char *mediastr = "";
943 if (type == IF_IDE || type == IF_SCSI) {
944 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
945 }
946 if (max_devs) {
947 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
948 mediastr, unit_id);
949 } else {
950 new_id = g_strdup_printf("%s%s%i", if_name[type],
951 mediastr, unit_id);
952 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500953 qdict_put_str(bs_opts, "id", new_id);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200954 g_free(new_id);
955 }
956
Kevin Wolf394c7d42013-09-13 14:09:17 +0200957 /* Add virtio block device */
Kevin Wolf394c7d42013-09-13 14:09:17 +0200958 if (type == IF_VIRTIO) {
959 QemuOpts *devopts;
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800960 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
961 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200962 if (arch_type == QEMU_ARCH_S390X) {
Alexander Graf1f68f1d2015-06-16 23:06:33 +0200963 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200964 } else {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100965 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200966 }
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100967 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
968 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200969 }
970
Max Reitzd095b462013-12-20 19:28:14 +0100971 filename = qemu_opt_get(legacy_opts, "file");
972
Kevin Wolfee13ed12014-02-09 09:52:32 +0100973 /* Check werror/rerror compatibility with if=... */
974 werror = qemu_opt_get(legacy_opts, "werror");
975 if (werror != NULL) {
976 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
977 type != IF_NONE) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200978 error_setg(errp, "werror is not supported by this bus type");
Kevin Wolfee13ed12014-02-09 09:52:32 +0100979 goto fail;
980 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500981 qdict_put_str(bs_opts, "werror", werror);
Kevin Wolfee13ed12014-02-09 09:52:32 +0100982 }
983
984 rerror = qemu_opt_get(legacy_opts, "rerror");
985 if (rerror != NULL) {
986 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
987 type != IF_NONE) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200988 error_setg(errp, "rerror is not supported by this bus type");
Kevin Wolfee13ed12014-02-09 09:52:32 +0100989 goto fail;
990 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500991 qdict_put_str(bs_opts, "rerror", rerror);
Kevin Wolfee13ed12014-02-09 09:52:32 +0100992 }
993
Kevin Wolf2d246f02013-09-18 15:14:47 +0200994 /* Actual block device init: Functionality shared with blockdev-add */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200995 blk = blockdev_init(filename, bs_opts, &local_err);
Markus Armbruster3cb0e252014-05-28 11:17:02 +0200996 bs_opts = NULL;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200997 if (!blk) {
Markus Armbrusterb2322002018-12-13 18:31:13 +0100998 error_propagate(errp, local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +0200999 goto fail;
Kevin Wolfb6810722013-09-20 11:33:11 +02001000 } else {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001001 assert(!local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001002 }
1003
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001004 /* Create legacy DriveInfo */
1005 dinfo = g_malloc0(sizeof(*dinfo));
Kevin Wolff298d072013-09-10 12:01:20 +02001006 dinfo->opts = all_opts;
Kevin Wolf2d246f02013-09-18 15:14:47 +02001007
Kevin Wolfee13ed12014-02-09 09:52:32 +01001008 dinfo->type = type;
Kevin Wolf87a899c2013-09-10 15:48:13 +02001009 dinfo->bus = bus_id;
1010 dinfo->unit = unit_id;
Kevin Wolfbcf83152014-06-06 15:21:48 +02001011
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001012 blk_set_legacy_dinfo(blk, dinfo);
1013
Kevin Wolfe34ef042013-09-19 14:24:10 +02001014 switch(type) {
1015 case IF_IDE:
1016 case IF_SCSI:
1017 case IF_XEN:
1018 case IF_NONE:
1019 dinfo->media_cd = media == MEDIA_CDROM;
1020 break;
1021 default:
1022 break;
1023 }
1024
Kevin Wolf2d246f02013-09-18 15:14:47 +02001025fail:
Kevin Wolf33cb7dc2013-08-28 17:00:13 +02001026 qemu_opts_del(legacy_opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +02001027 qobject_unref(bs_opts);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001028 return dinfo;
Kevin Wolf57975222013-07-17 14:41:54 +02001029}
1030
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02001031static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp)
1032{
1033 BlockDriverState *bs;
1034
1035 bs = bdrv_lookup_bs(name, name, errp);
1036 if (bs == NULL) {
1037 return NULL;
1038 }
1039
1040 if (!bdrv_is_root_node(bs)) {
1041 error_setg(errp, "Need a root block node");
1042 return NULL;
1043 }
1044
1045 if (!bdrv_is_inserted(bs)) {
1046 error_setg(errp, "Device has no medium");
1047 return NULL;
1048 }
1049
1050 return bs;
1051}
1052
Kevin Wolfb33945c2016-09-20 13:38:43 +02001053static BlockBackend *qmp_get_blk(const char *blk_name, const char *qdev_id,
1054 Error **errp)
1055{
1056 BlockBackend *blk;
1057
1058 if (!blk_name == !qdev_id) {
1059 error_setg(errp, "Need exactly one of 'device' and 'id'");
1060 return NULL;
1061 }
1062
1063 if (qdev_id) {
1064 blk = blk_by_qdev_id(qdev_id, errp);
1065 } else {
1066 blk = blk_by_name(blk_name);
1067 if (blk == NULL) {
1068 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1069 "Device '%s' not found", blk_name);
1070 }
1071 }
1072
1073 return blk;
1074}
1075
Markus Armbruster3e5a50d2015-02-06 13:55:43 +01001076void hmp_commit(Monitor *mon, const QDict *qdict)
Markus Armbruster666daa62010-06-02 18:48:27 +02001077{
Markus Armbruster666daa62010-06-02 18:48:27 +02001078 const char *device = qdict_get_str(qdict, "device");
Fam Zhenga0e85442015-03-02 19:36:48 +08001079 BlockBackend *blk;
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001080 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +02001081
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001082 if (!strcmp(device, "all")) {
Max Reitzda31d592016-03-16 19:54:32 +01001083 ret = blk_commit_all();
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001084 } else {
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001085 BlockDriverState *bs;
1086 AioContext *aio_context;
1087
Fam Zhenga0e85442015-03-02 19:36:48 +08001088 blk = blk_by_name(device);
1089 if (!blk) {
Jeff Cody58513bd2013-01-18 12:45:35 -05001090 monitor_printf(mon, "Device '%s' not found\n", device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001091 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001092 }
Max Reitz5433c242015-10-19 17:53:29 +02001093 if (!blk_is_available(blk)) {
1094 monitor_printf(mon, "Device '%s' has no medium\n", device);
1095 return;
1096 }
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001097
1098 bs = blk_bs(blk);
1099 aio_context = bdrv_get_aio_context(bs);
1100 aio_context_acquire(aio_context);
1101
1102 ret = bdrv_commit(bs);
1103
1104 aio_context_release(aio_context);
Jeff Cody58513bd2013-01-18 12:45:35 -05001105 }
1106 if (ret < 0) {
1107 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1108 strerror(-ret));
Markus Armbruster666daa62010-06-02 18:48:27 +02001109 }
1110}
1111
Eric Blake10f75902016-03-03 09:16:50 -07001112static void blockdev_do_action(TransactionAction *action, Error **errp)
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001113{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001114 TransactionActionList list;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001115
Eric Blake10f75902016-03-03 09:16:50 -07001116 list.value = action;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001117 list.next = NULL;
John Snow94d16a62015-11-05 18:13:18 -05001118 qmp_transaction(&list, false, NULL, errp);
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001119}
1120
Benoît Canet0901f672014-01-23 21:31:38 +01001121void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1122 bool has_node_name, const char *node_name,
1123 const char *snapshot_file,
1124 bool has_snapshot_node_name,
1125 const char *snapshot_node_name,
Luiz Capitulino6106e242011-11-25 16:15:19 -02001126 bool has_format, const char *format,
Benoît Canet0901f672014-01-23 21:31:38 +01001127 bool has_mode, NewImageMode mode, Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +01001128{
Alberto Garciaa911e6a2015-10-26 14:27:14 +02001129 BlockdevSnapshotSync snapshot = {
Benoît Canet0901f672014-01-23 21:31:38 +01001130 .has_device = has_device,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001131 .device = (char *) device,
Benoît Canet0901f672014-01-23 21:31:38 +01001132 .has_node_name = has_node_name,
1133 .node_name = (char *) node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001134 .snapshot_file = (char *) snapshot_file,
Benoît Canet0901f672014-01-23 21:31:38 +01001135 .has_snapshot_node_name = has_snapshot_node_name,
1136 .snapshot_node_name = (char *) snapshot_node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001137 .has_format = has_format,
1138 .format = (char *) format,
1139 .has_mode = has_mode,
1140 .mode = mode,
1141 };
Eric Blake10f75902016-03-03 09:16:50 -07001142 TransactionAction action = {
1143 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001144 .u.blockdev_snapshot_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001145 };
1146 blockdev_do_action(&action, errp);
Jes Sorensenf8882562010-12-16 13:52:16 +01001147}
1148
Alberto Garcia43de7e22015-10-26 14:27:16 +02001149void qmp_blockdev_snapshot(const char *node, const char *overlay,
1150 Error **errp)
1151{
1152 BlockdevSnapshot snapshot_data = {
1153 .node = (char *) node,
1154 .overlay = (char *) overlay
1155 };
Eric Blake10f75902016-03-03 09:16:50 -07001156 TransactionAction action = {
1157 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
Eric Blake32bafa82016-03-17 16:48:37 -06001158 .u.blockdev_snapshot.data = &snapshot_data,
Eric Blake10f75902016-03-03 09:16:50 -07001159 };
1160 blockdev_do_action(&action, errp);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001161}
1162
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001163void qmp_blockdev_snapshot_internal_sync(const char *device,
1164 const char *name,
1165 Error **errp)
1166{
1167 BlockdevSnapshotInternal snapshot = {
1168 .device = (char *) device,
1169 .name = (char *) name
1170 };
Eric Blake10f75902016-03-03 09:16:50 -07001171 TransactionAction action = {
1172 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001173 .u.blockdev_snapshot_internal_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001174 };
1175 blockdev_do_action(&action, errp);
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001176}
1177
Wenchao Xia44e3e052013-09-11 14:04:36 +08001178SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1179 bool has_id,
1180 const char *id,
1181 bool has_name,
1182 const char *name,
1183 Error **errp)
1184{
Fam Zhenga0e85442015-03-02 19:36:48 +08001185 BlockDriverState *bs;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001186 AioContext *aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001187 QEMUSnapshotInfo sn;
1188 Error *local_err = NULL;
1189 SnapshotInfo *info = NULL;
1190 int ret;
1191
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001192 bs = qmp_get_root_bs(device, errp);
1193 if (!bs) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001194 return NULL;
1195 }
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001196 aio_context = bdrv_get_aio_context(bs);
Max Reitz5433c242015-10-19 17:53:29 +02001197 aio_context_acquire(aio_context);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001198
1199 if (!has_id) {
1200 id = NULL;
1201 }
1202
1203 if (!has_name) {
1204 name = NULL;
1205 }
1206
1207 if (!id && !name) {
1208 error_setg(errp, "Name or id must be provided");
Max Reitz5433c242015-10-19 17:53:29 +02001209 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001210 }
1211
Stefan Hajnoczi0b928852014-11-19 14:19:43 +00001212 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1213 goto out_aio_context;
1214 }
1215
Wenchao Xia44e3e052013-09-11 14:04:36 +08001216 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001217 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001218 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001219 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001220 }
1221 if (!ret) {
1222 error_setg(errp,
1223 "Snapshot with id '%s' and name '%s' does not exist on "
1224 "device '%s'",
1225 STR_OR_NULL(id), STR_OR_NULL(name), device);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001226 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001227 }
1228
1229 bdrv_snapshot_delete(bs, id, name, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001230 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001231 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001232 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001233 }
1234
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001235 aio_context_release(aio_context);
1236
Markus Armbruster5839e532014-08-19 10:31:08 +02001237 info = g_new0(SnapshotInfo, 1);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001238 info->id = g_strdup(sn.id_str);
1239 info->name = g_strdup(sn.name);
1240 info->date_nsec = sn.date_nsec;
1241 info->date_sec = sn.date_sec;
1242 info->vm_state_size = sn.vm_state_size;
1243 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1244 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1245
1246 return info;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001247
1248out_aio_context:
1249 aio_context_release(aio_context);
1250 return NULL;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001251}
Jeff Cody8802d1f2012-02-28 15:54:06 -05001252
John Snow341ebc22015-04-17 19:49:52 -04001253/**
1254 * block_dirty_bitmap_lookup:
1255 * Return a dirty bitmap (if present), after validating
1256 * the node reference and bitmap names.
1257 *
1258 * @node: The name of the BDS node to search for bitmaps
1259 * @name: The name of the bitmap to search for
1260 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
John Snow341ebc22015-04-17 19:49:52 -04001261 * @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 Snow3ae96d62019-03-12 12:05:49 -04002014 if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_DEFAULT, errp)) {
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002015 return;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002016 }
2017
2018 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
Fam Zhengdf9a6812015-11-09 18:16:54 +08002019}
2020
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002021static void block_dirty_bitmap_restore(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002022{
2023 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2024 common, common);
2025
John Snow184dd9c2017-03-15 17:28:11 -04002026 if (state->backup) {
Vladimir Sementsov-Ogievskiy56bd6622018-10-29 16:23:14 -04002027 bdrv_restore_dirty_bitmap(state->bitmap, state->backup);
John Snow184dd9c2017-03-15 17:28:11 -04002028 }
Fam Zhengdf9a6812015-11-09 18:16:54 +08002029}
2030
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002031static void block_dirty_bitmap_free_backup(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002032{
2033 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2034 common, common);
2035
2036 hbitmap_free(state->backup);
2037}
2038
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002039static void block_dirty_bitmap_enable_prepare(BlkActionState *common,
2040 Error **errp)
2041{
2042 BlockDirtyBitmap *action;
2043 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2044 common, common);
2045
2046 if (action_check_completion_mode(common, errp) < 0) {
2047 return;
2048 }
2049
John Snow0e2b7f02018-12-21 04:35:22 -05002050 action = common->action->u.block_dirty_bitmap_enable.data;
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002051 state->bitmap = block_dirty_bitmap_lookup(action->node,
2052 action->name,
2053 NULL,
2054 errp);
2055 if (!state->bitmap) {
2056 return;
2057 }
2058
John Snow3ae96d62019-03-12 12:05:49 -04002059 if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
John Snowb053bb52018-10-29 16:23:16 -04002060 return;
2061 }
2062
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002063 state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
2064 bdrv_enable_dirty_bitmap(state->bitmap);
2065}
2066
2067static void block_dirty_bitmap_enable_abort(BlkActionState *common)
2068{
2069 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2070 common, common);
2071
2072 if (!state->was_enabled) {
2073 bdrv_disable_dirty_bitmap(state->bitmap);
2074 }
2075}
2076
2077static void block_dirty_bitmap_disable_prepare(BlkActionState *common,
2078 Error **errp)
2079{
2080 BlockDirtyBitmap *action;
2081 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2082 common, common);
2083
2084 if (action_check_completion_mode(common, errp) < 0) {
2085 return;
2086 }
2087
John Snow0e2b7f02018-12-21 04:35:22 -05002088 action = common->action->u.block_dirty_bitmap_disable.data;
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002089 state->bitmap = block_dirty_bitmap_lookup(action->node,
2090 action->name,
2091 NULL,
2092 errp);
2093 if (!state->bitmap) {
2094 return;
2095 }
2096
John Snow3ae96d62019-03-12 12:05:49 -04002097 if (bdrv_dirty_bitmap_check(state->bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
John Snowb053bb52018-10-29 16:23:16 -04002098 return;
2099 }
2100
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002101 state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
2102 bdrv_disable_dirty_bitmap(state->bitmap);
2103}
2104
2105static void block_dirty_bitmap_disable_abort(BlkActionState *common)
2106{
2107 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2108 common, common);
2109
2110 if (state->was_enabled) {
2111 bdrv_enable_dirty_bitmap(state->bitmap);
2112 }
2113}
2114
John Snow360d4e42018-12-21 04:35:21 -05002115static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node,
2116 const char *target,
2117 strList *bitmaps,
2118 HBitmap **backup,
2119 Error **errp);
2120
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002121static void block_dirty_bitmap_merge_prepare(BlkActionState *common,
2122 Error **errp)
2123{
2124 BlockDirtyBitmapMerge *action;
2125 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2126 common, common);
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002127
2128 if (action_check_completion_mode(common, errp) < 0) {
2129 return;
2130 }
2131
John Snow0e2b7f02018-12-21 04:35:22 -05002132 action = common->action->u.block_dirty_bitmap_merge.data;
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002133
John Snow360d4e42018-12-21 04:35:21 -05002134 state->bitmap = do_block_dirty_bitmap_merge(action->node, action->target,
2135 action->bitmaps, &state->backup,
2136 errp);
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002137}
2138
John Snow50f43f02015-11-05 18:13:09 -05002139static void abort_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002140{
2141 error_setg(errp, "Transaction aborted using Abort action");
2142}
2143
John Snow50f43f02015-11-05 18:13:09 -05002144static void abort_commit(BlkActionState *common)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002145{
Stefan Weildfc6f862013-07-25 18:21:28 +02002146 g_assert_not_reached(); /* this action never succeeds */
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002147}
2148
John Snow50f43f02015-11-05 18:13:09 -05002149static const BlkActionOps actions[] = {
Alberto Garcia43de7e22015-10-26 14:27:16 +02002150 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2151 .instance_size = sizeof(ExternalSnapshotState),
2152 .prepare = external_snapshot_prepare,
2153 .commit = external_snapshot_commit,
2154 .abort = external_snapshot_abort,
Alberto Garcia4ad6f3d2015-11-13 15:00:24 +02002155 .clean = external_snapshot_clean,
Alberto Garcia43de7e22015-10-26 14:27:16 +02002156 },
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002157 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002158 .instance_size = sizeof(ExternalSnapshotState),
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002159 .prepare = external_snapshot_prepare,
2160 .commit = external_snapshot_commit,
2161 .abort = external_snapshot_abort,
Fam Zhengda763e82015-10-23 11:08:10 +08002162 .clean = external_snapshot_clean,
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002163 },
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002164 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2165 .instance_size = sizeof(DriveBackupState),
2166 .prepare = drive_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002167 .commit = drive_backup_commit,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002168 .abort = drive_backup_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002169 .clean = drive_backup_clean,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002170 },
Fam Zhengbd8baec2014-12-18 18:37:06 +08002171 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2172 .instance_size = sizeof(BlockdevBackupState),
2173 .prepare = blockdev_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002174 .commit = blockdev_backup_commit,
Fam Zhengbd8baec2014-12-18 18:37:06 +08002175 .abort = blockdev_backup_abort,
2176 .clean = blockdev_backup_clean,
2177 },
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002178 [TRANSACTION_ACTION_KIND_ABORT] = {
John Snow50f43f02015-11-05 18:13:09 -05002179 .instance_size = sizeof(BlkActionState),
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002180 .prepare = abort_prepare,
2181 .commit = abort_commit,
2182 },
Wenchao Xiabbe86012013-09-11 14:04:34 +08002183 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2184 .instance_size = sizeof(InternalSnapshotState),
2185 .prepare = internal_snapshot_prepare,
2186 .abort = internal_snapshot_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002187 .clean = internal_snapshot_clean,
Wenchao Xiabbe86012013-09-11 14:04:34 +08002188 },
Fam Zhengdf9a6812015-11-09 18:16:54 +08002189 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2190 .instance_size = sizeof(BlockDirtyBitmapState),
2191 .prepare = block_dirty_bitmap_add_prepare,
2192 .abort = block_dirty_bitmap_add_abort,
2193 },
2194 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2195 .instance_size = sizeof(BlockDirtyBitmapState),
2196 .prepare = block_dirty_bitmap_clear_prepare,
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002197 .commit = block_dirty_bitmap_free_backup,
2198 .abort = block_dirty_bitmap_restore,
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002199 },
John Snow0e2b7f02018-12-21 04:35:22 -05002200 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ENABLE] = {
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002201 .instance_size = sizeof(BlockDirtyBitmapState),
2202 .prepare = block_dirty_bitmap_enable_prepare,
2203 .abort = block_dirty_bitmap_enable_abort,
2204 },
John Snow0e2b7f02018-12-21 04:35:22 -05002205 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_DISABLE] = {
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002206 .instance_size = sizeof(BlockDirtyBitmapState),
2207 .prepare = block_dirty_bitmap_disable_prepare,
2208 .abort = block_dirty_bitmap_disable_abort,
John Snow66da04d2018-09-06 09:02:25 -04002209 },
John Snow0e2b7f02018-12-21 04:35:22 -05002210 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_MERGE] = {
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002211 .instance_size = sizeof(BlockDirtyBitmapState),
2212 .prepare = block_dirty_bitmap_merge_prepare,
2213 .commit = block_dirty_bitmap_free_backup,
2214 .abort = block_dirty_bitmap_restore,
2215 },
John Snow66da04d2018-09-06 09:02:25 -04002216 /* Where are transactions for MIRROR, COMMIT and STREAM?
2217 * Although these blockjobs use transaction callbacks like the backup job,
2218 * these jobs do not necessarily adhere to transaction semantics.
2219 * These jobs may not fully undo all of their actions on abort, nor do they
2220 * necessarily work in transactions with more than one job in them.
2221 */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002222};
2223
John Snow94d16a62015-11-05 18:13:18 -05002224/**
2225 * Allocate a TransactionProperties structure if necessary, and fill
2226 * that structure with desired defaults if they are unset.
2227 */
2228static TransactionProperties *get_transaction_properties(
2229 TransactionProperties *props)
2230{
2231 if (!props) {
2232 props = g_new0(TransactionProperties, 1);
2233 }
2234
2235 if (!props->has_completion_mode) {
2236 props->has_completion_mode = true;
2237 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2238 }
2239
2240 return props;
2241}
2242
Jeff Cody8802d1f2012-02-28 15:54:06 -05002243/*
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002244 * 'Atomic' group operations. The operations are performed as a set, and if
2245 * any fail then we roll back all operations in the group.
Jeff Cody8802d1f2012-02-28 15:54:06 -05002246 */
John Snow94d16a62015-11-05 18:13:18 -05002247void qmp_transaction(TransactionActionList *dev_list,
2248 bool has_props,
2249 struct TransactionProperties *props,
2250 Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -05002251{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002252 TransactionActionList *dev_entry = dev_list;
Kevin Wolf62c9e412018-04-19 16:09:52 +02002253 JobTxn *block_job_txn = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002254 BlkActionState *state, *next;
Luiz Capitulino43e17042012-11-30 10:52:07 -02002255 Error *local_err = NULL;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002256
John Snowf4de0f82019-01-11 11:59:16 -06002257 QTAILQ_HEAD(, BlkActionState) snap_bdrv_states;
2258 QTAILQ_INIT(&snap_bdrv_states);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002259
John Snow94d16a62015-11-05 18:13:18 -05002260 /* Does this transaction get canceled as a group on failure?
Kevin Wolf62c9e412018-04-19 16:09:52 +02002261 * If not, we don't really need to make a JobTxn.
John Snow94d16a62015-11-05 18:13:18 -05002262 */
2263 props = get_transaction_properties(props);
2264 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02002265 block_job_txn = job_txn_new();
John Snow94d16a62015-11-05 18:13:18 -05002266 }
2267
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002268 /* drain all i/o before any operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002269 bdrv_drain_all();
2270
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002271 /* We don't do anything in this loop that commits us to the operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002272 while (NULL != dev_entry) {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002273 TransactionAction *dev_info = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002274 const BlkActionOps *ops;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002275
Jeff Cody8802d1f2012-02-28 15:54:06 -05002276 dev_info = dev_entry->value;
2277 dev_entry = dev_entry->next;
2278
Eric Blake6a8f9662015-10-26 16:34:54 -06002279 assert(dev_info->type < ARRAY_SIZE(actions));
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002280
Eric Blake6a8f9662015-10-26 16:34:54 -06002281 ops = &actions[dev_info->type];
Max Reitzaa3fe712013-09-12 14:57:27 +02002282 assert(ops->instance_size > 0);
2283
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002284 state = g_malloc0(ops->instance_size);
2285 state->ops = ops;
2286 state->action = dev_info;
John Snow94d16a62015-11-05 18:13:18 -05002287 state->block_job_txn = block_job_txn;
2288 state->txn_props = props;
John Snowf4de0f82019-01-11 11:59:16 -06002289 QTAILQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002290
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002291 state->ops->prepare(state, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002292 if (local_err) {
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002293 error_propagate(errp, local_err);
2294 goto delete_and_fail;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002295 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002296 }
2297
John Snowf4de0f82019-01-11 11:59:16 -06002298 QTAILQ_FOREACH(state, &snap_bdrv_states, entry) {
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02002299 if (state->ops->commit) {
2300 state->ops->commit(state);
2301 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002302 }
2303
2304 /* success */
2305 goto exit;
2306
2307delete_and_fail:
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002308 /* failure, and it is all-or-none; roll back all operations */
John Snowf4de0f82019-01-11 11:59:16 -06002309 QTAILQ_FOREACH_REVERSE(state, &snap_bdrv_states, entry) {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002310 if (state->ops->abort) {
2311 state->ops->abort(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002312 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002313 }
2314exit:
John Snowf4de0f82019-01-11 11:59:16 -06002315 QTAILQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002316 if (state->ops->clean) {
2317 state->ops->clean(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002318 }
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002319 g_free(state);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002320 }
John Snow94d16a62015-11-05 18:13:18 -05002321 if (!has_props) {
2322 qapi_free_TransactionProperties(props);
2323 }
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02002324 job_txn_unref(block_job_txn);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002325}
2326
Kevin Wolffbe2d812016-09-20 13:38:46 +02002327void qmp_eject(bool has_device, const char *device,
2328 bool has_id, const char *id,
2329 bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002330{
Max Reitz38f54bd2015-10-26 21:39:12 +01002331 Error *local_err = NULL;
John Snow3a3086b2016-05-18 17:53:40 -04002332 int rc;
Markus Armbruster666daa62010-06-02 18:48:27 +02002333
John Snow3a3086b2016-05-18 17:53:40 -04002334 if (!has_force) {
2335 force = false;
2336 }
2337
Kevin Wolffbe2d812016-09-20 13:38:46 +02002338 rc = do_open_tray(has_device ? device : NULL,
2339 has_id ? id : NULL,
2340 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002341 if (rc && rc != -ENOSYS) {
Max Reitz38f54bd2015-10-26 21:39:12 +01002342 error_propagate(errp, local_err);
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02002343 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002344 }
Colin Lordbf18bee2016-06-06 14:15:22 -04002345 error_free(local_err);
John Snow3a3086b2016-05-18 17:53:40 -04002346
Max Reitz82fcf662017-11-10 23:43:01 +01002347 blockdev_remove_medium(has_device, device, has_id, id, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02002348}
2349
Benoît Canet12d3ba82014-01-23 21:31:35 +01002350void qmp_block_passwd(bool has_device, const char *device,
2351 bool has_node_name, const char *node_name,
2352 const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002353{
Daniel P. Berrangec01c2142017-06-23 17:24:16 +01002354 error_setg(errp,
2355 "Setting block passwords directly is no longer supported");
Markus Armbruster666daa62010-06-02 18:48:27 +02002356}
2357
Colin Lordbf18bee2016-06-06 14:15:22 -04002358/*
2359 * Attempt to open the tray of @device.
2360 * If @force, ignore its tray lock.
2361 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2362 * On error, store an error through @errp and return -errno.
2363 * If @device does not exist, return -ENODEV.
2364 * If it has no removable media, return -ENOTSUP.
2365 * If it has no tray, return -ENOSYS.
2366 * If the guest was asked to open the tray, return -EINPROGRESS.
2367 * Else, return 0.
John Snow3a3086b2016-05-18 17:53:40 -04002368 */
Kevin Wolfb33945c2016-09-20 13:38:43 +02002369static int do_open_tray(const char *blk_name, const char *qdev_id,
2370 bool force, Error **errp)
Max Reitz7d8a9f72015-10-26 21:39:08 +01002371{
2372 BlockBackend *blk;
Kevin Wolfb33945c2016-09-20 13:38:43 +02002373 const char *device = qdev_id ?: blk_name;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002374 bool locked;
2375
Kevin Wolfb33945c2016-09-20 13:38:43 +02002376 blk = qmp_get_blk(blk_name, qdev_id, errp);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002377 if (!blk) {
John Snow3a3086b2016-05-18 17:53:40 -04002378 return -ENODEV;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002379 }
2380
2381 if (!blk_dev_has_removable_media(blk)) {
2382 error_setg(errp, "Device '%s' is not removable", device);
John Snow3a3086b2016-05-18 17:53:40 -04002383 return -ENOTSUP;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002384 }
2385
Max Reitz12c7ec82016-01-29 20:49:11 +01002386 if (!blk_dev_has_tray(blk)) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002387 error_setg(errp, "Device '%s' does not have a tray", device);
2388 return -ENOSYS;
Max Reitz12c7ec82016-01-29 20:49:11 +01002389 }
2390
Max Reitz7d8a9f72015-10-26 21:39:08 +01002391 if (blk_dev_is_tray_open(blk)) {
John Snow3a3086b2016-05-18 17:53:40 -04002392 return 0;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002393 }
2394
2395 locked = blk_dev_is_medium_locked(blk);
2396 if (locked) {
2397 blk_dev_eject_request(blk, force);
2398 }
2399
2400 if (!locked || force) {
Kevin Wolf39829a02017-01-24 14:21:41 +01002401 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002402 }
John Snow3a3086b2016-05-18 17:53:40 -04002403
2404 if (locked && !force) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002405 error_setg(errp, "Device '%s' is locked and force was not specified, "
2406 "wait for tray to open and try again", device);
2407 return -EINPROGRESS;
John Snow3a3086b2016-05-18 17:53:40 -04002408 }
2409
2410 return 0;
2411}
2412
Kevin Wolfb33945c2016-09-20 13:38:43 +02002413void qmp_blockdev_open_tray(bool has_device, const char *device,
2414 bool has_id, const char *id,
2415 bool has_force, bool force,
John Snow3a3086b2016-05-18 17:53:40 -04002416 Error **errp)
2417{
Colin Lordbf18bee2016-06-06 14:15:22 -04002418 Error *local_err = NULL;
2419 int rc;
2420
John Snow3a3086b2016-05-18 17:53:40 -04002421 if (!has_force) {
2422 force = false;
2423 }
Kevin Wolfb33945c2016-09-20 13:38:43 +02002424 rc = do_open_tray(has_device ? device : NULL,
2425 has_id ? id : NULL,
2426 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002427 if (rc && rc != -ENOSYS && rc != -EINPROGRESS) {
2428 error_propagate(errp, local_err);
2429 return;
2430 }
2431 error_free(local_err);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002432}
2433
Kevin Wolfb33945c2016-09-20 13:38:43 +02002434void qmp_blockdev_close_tray(bool has_device, const char *device,
2435 bool has_id, const char *id,
2436 Error **errp)
Max Reitzabaaf592015-10-26 21:39:09 +01002437{
2438 BlockBackend *blk;
Kevin Wolf39829a02017-01-24 14:21:41 +01002439 Error *local_err = NULL;
Max Reitzabaaf592015-10-26 21:39:09 +01002440
Kevin Wolfb33945c2016-09-20 13:38:43 +02002441 device = has_device ? device : NULL;
2442 id = has_id ? id : NULL;
2443
2444 blk = qmp_get_blk(device, id, errp);
Max Reitzabaaf592015-10-26 21:39:09 +01002445 if (!blk) {
Max Reitzabaaf592015-10-26 21:39:09 +01002446 return;
2447 }
2448
2449 if (!blk_dev_has_removable_media(blk)) {
Kevin Wolfb33945c2016-09-20 13:38:43 +02002450 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitzabaaf592015-10-26 21:39:09 +01002451 return;
2452 }
2453
Max Reitz12c7ec82016-01-29 20:49:11 +01002454 if (!blk_dev_has_tray(blk)) {
2455 /* Ignore this command on tray-less devices */
2456 return;
2457 }
2458
Max Reitzabaaf592015-10-26 21:39:09 +01002459 if (!blk_dev_is_tray_open(blk)) {
2460 return;
2461 }
2462
Kevin Wolf39829a02017-01-24 14:21:41 +01002463 blk_dev_change_media_cb(blk, true, &local_err);
2464 if (local_err) {
2465 error_propagate(errp, local_err);
2466 return;
2467 }
Max Reitzabaaf592015-10-26 21:39:09 +01002468}
2469
Max Reitz82fcf662017-11-10 23:43:01 +01002470static void blockdev_remove_medium(bool has_device, const char *device,
2471 bool has_id, const char *id, Error **errp)
Max Reitz2814f672015-10-26 21:39:10 +01002472{
2473 BlockBackend *blk;
2474 BlockDriverState *bs;
2475 AioContext *aio_context;
Kevin Wolf00949ba2016-09-20 13:38:45 +02002476 bool has_attached_device;
Max Reitz2814f672015-10-26 21:39:10 +01002477
Kevin Wolf00949ba2016-09-20 13:38:45 +02002478 device = has_device ? device : NULL;
2479 id = has_id ? id : NULL;
2480
2481 blk = qmp_get_blk(device, id, errp);
Max Reitz2814f672015-10-26 21:39:10 +01002482 if (!blk) {
Max Reitz2814f672015-10-26 21:39:10 +01002483 return;
2484 }
2485
2486 /* For BBs without a device, we can exchange the BDS tree at will */
Kevin Wolf00949ba2016-09-20 13:38:45 +02002487 has_attached_device = blk_get_attached_dev(blk);
Max Reitz2814f672015-10-26 21:39:10 +01002488
Kevin Wolf00949ba2016-09-20 13:38:45 +02002489 if (has_attached_device && !blk_dev_has_removable_media(blk)) {
2490 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002491 return;
2492 }
2493
Kevin Wolf00949ba2016-09-20 13:38:45 +02002494 if (has_attached_device && blk_dev_has_tray(blk) &&
2495 !blk_dev_is_tray_open(blk))
2496 {
2497 error_setg(errp, "Tray of device '%s' is not open", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002498 return;
2499 }
2500
2501 bs = blk_bs(blk);
2502 if (!bs) {
2503 return;
2504 }
2505
2506 aio_context = bdrv_get_aio_context(bs);
2507 aio_context_acquire(aio_context);
2508
2509 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2510 goto out;
2511 }
2512
Max Reitz2814f672015-10-26 21:39:10 +01002513 blk_remove_bs(blk);
2514
Max Reitz12c7ec82016-01-29 20:49:11 +01002515 if (!blk_dev_has_tray(blk)) {
2516 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2517 * called at all); therefore, the medium needs to be ejected here.
2518 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2519 * value passed here (i.e. false). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002520 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz12c7ec82016-01-29 20:49:11 +01002521 }
2522
Max Reitz2814f672015-10-26 21:39:10 +01002523out:
2524 aio_context_release(aio_context);
2525}
2526
Max Reitz34ce1112017-11-10 23:43:02 +01002527void qmp_blockdev_remove_medium(const char *id, Error **errp)
Max Reitz82fcf662017-11-10 23:43:01 +01002528{
2529 blockdev_remove_medium(false, NULL, true, id, errp);
2530}
2531
Kevin Wolf716df212016-09-20 13:38:44 +02002532static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
Max Reitzd1299882015-10-26 21:39:11 +01002533 BlockDriverState *bs, Error **errp)
2534{
Kevin Wolf39829a02017-01-24 14:21:41 +01002535 Error *local_err = NULL;
Max Reitzd1299882015-10-26 21:39:11 +01002536 bool has_device;
Kevin Wolfd7086422017-01-13 19:02:32 +01002537 int ret;
Max Reitzd1299882015-10-26 21:39:11 +01002538
Max Reitzd1299882015-10-26 21:39:11 +01002539 /* For BBs without a device, we can exchange the BDS tree at will */
2540 has_device = blk_get_attached_dev(blk);
2541
2542 if (has_device && !blk_dev_has_removable_media(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002543 error_setg(errp, "Device is not removable");
Max Reitzd1299882015-10-26 21:39:11 +01002544 return;
2545 }
2546
Max Reitz12c7ec82016-01-29 20:49:11 +01002547 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002548 error_setg(errp, "Tray of the device is not open");
Max Reitzd1299882015-10-26 21:39:11 +01002549 return;
2550 }
2551
2552 if (blk_bs(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002553 error_setg(errp, "There already is a medium in the device");
Max Reitzd1299882015-10-26 21:39:11 +01002554 return;
2555 }
2556
Kevin Wolfd7086422017-01-13 19:02:32 +01002557 ret = blk_insert_bs(blk, bs, errp);
2558 if (ret < 0) {
2559 return;
2560 }
Max Reitzd1299882015-10-26 21:39:11 +01002561
Max Reitz12c7ec82016-01-29 20:49:11 +01002562 if (!blk_dev_has_tray(blk)) {
2563 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2564 * called at all); therefore, the medium needs to be pushed into the
2565 * slot here.
2566 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2567 * value passed here (i.e. true). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002568 blk_dev_change_media_cb(blk, true, &local_err);
2569 if (local_err) {
2570 error_propagate(errp, local_err);
2571 blk_remove_bs(blk);
2572 return;
2573 }
Max Reitz12c7ec82016-01-29 20:49:11 +01002574 }
Max Reitzd1299882015-10-26 21:39:11 +01002575}
2576
Max Reitz82fcf662017-11-10 23:43:01 +01002577static void blockdev_insert_medium(bool has_device, const char *device,
2578 bool has_id, const char *id,
2579 const char *node_name, Error **errp)
Max Reitzd1299882015-10-26 21:39:11 +01002580{
Kevin Wolf716df212016-09-20 13:38:44 +02002581 BlockBackend *blk;
Max Reitzd1299882015-10-26 21:39:11 +01002582 BlockDriverState *bs;
2583
Kevin Wolf716df212016-09-20 13:38:44 +02002584 blk = qmp_get_blk(has_device ? device : NULL,
2585 has_id ? id : NULL,
2586 errp);
2587 if (!blk) {
2588 return;
2589 }
2590
Max Reitzd1299882015-10-26 21:39:11 +01002591 bs = bdrv_find_node(node_name);
2592 if (!bs) {
2593 error_setg(errp, "Node '%s' not found", node_name);
2594 return;
2595 }
2596
Kevin Wolf1f0c4612016-03-22 18:38:44 +01002597 if (bdrv_has_blk(bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02002598 error_setg(errp, "Node '%s' is already in use", node_name);
Max Reitzd1299882015-10-26 21:39:11 +01002599 return;
2600 }
2601
Kevin Wolf716df212016-09-20 13:38:44 +02002602 qmp_blockdev_insert_anon_medium(blk, bs, errp);
Max Reitzd1299882015-10-26 21:39:11 +01002603}
2604
Max Reitz34ce1112017-11-10 23:43:02 +01002605void qmp_blockdev_insert_medium(const char *id, const char *node_name,
2606 Error **errp)
Max Reitz82fcf662017-11-10 23:43:01 +01002607{
2608 blockdev_insert_medium(false, NULL, true, id, node_name, errp);
2609}
2610
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002611void qmp_blockdev_change_medium(bool has_device, const char *device,
2612 bool has_id, const char *id,
2613 const char *filename,
Max Reitz24fb4132015-11-06 16:27:06 +01002614 bool has_format, const char *format,
Max Reitz39ff43d2015-11-11 04:49:44 +01002615 bool has_read_only,
2616 BlockdevChangeReadOnlyMode read_only,
Max Reitz24fb4132015-11-06 16:27:06 +01002617 Error **errp)
Max Reitzde2c6c02015-10-26 21:39:13 +01002618{
2619 BlockBackend *blk;
2620 BlockDriverState *medium_bs = NULL;
Max Reitz5b363932016-05-17 16:41:31 +02002621 int bdrv_flags;
Kevin Wolfb85114f2016-09-12 19:08:31 +02002622 bool detect_zeroes;
Colin Lord38a53d52016-06-08 13:56:28 -04002623 int rc;
Max Reitzde2c6c02015-10-26 21:39:13 +01002624 QDict *options = NULL;
2625 Error *err = NULL;
2626
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002627 blk = qmp_get_blk(has_device ? device : NULL,
2628 has_id ? id : NULL,
2629 errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002630 if (!blk) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002631 goto fail;
2632 }
2633
2634 if (blk_bs(blk)) {
2635 blk_update_root_state(blk);
2636 }
2637
2638 bdrv_flags = blk_get_open_flags_from_root_state(blk);
Alyssa Milburn156abc22016-02-06 13:36:18 +00002639 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
Kevin Wolfe35bdc12018-10-05 18:57:40 +02002640 BDRV_O_PROTOCOL | BDRV_O_AUTO_RDONLY);
Max Reitzde2c6c02015-10-26 21:39:13 +01002641
Max Reitz39ff43d2015-11-11 04:49:44 +01002642 if (!has_read_only) {
2643 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2644 }
2645
2646 switch (read_only) {
2647 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2648 break;
2649
2650 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2651 bdrv_flags &= ~BDRV_O_RDWR;
2652 break;
2653
2654 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2655 bdrv_flags |= BDRV_O_RDWR;
2656 break;
2657
2658 default:
2659 abort();
2660 }
2661
Kevin Wolfb85114f2016-09-12 19:08:31 +02002662 options = qdict_new();
2663 detect_zeroes = blk_get_detect_zeroes_from_root_state(blk);
Eric Blake46f5ac22017-04-27 16:58:17 -05002664 qdict_put_str(options, "detect-zeroes", detect_zeroes ? "on" : "off");
Kevin Wolfb85114f2016-09-12 19:08:31 +02002665
Max Reitz24fb4132015-11-06 16:27:06 +01002666 if (has_format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05002667 qdict_put_str(options, "driver", format);
Max Reitzde2c6c02015-10-26 21:39:13 +01002668 }
2669
Max Reitz5b363932016-05-17 16:41:31 +02002670 medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp);
2671 if (!medium_bs) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002672 goto fail;
2673 }
2674
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002675 rc = do_open_tray(has_device ? device : NULL,
2676 has_id ? id : NULL,
2677 false, &err);
Colin Lord38a53d52016-06-08 13:56:28 -04002678 if (rc && rc != -ENOSYS) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002679 error_propagate(errp, err);
2680 goto fail;
2681 }
Colin Lord38a53d52016-06-08 13:56:28 -04002682 error_free(err);
2683 err = NULL;
Max Reitzde2c6c02015-10-26 21:39:13 +01002684
Max Reitz82fcf662017-11-10 23:43:01 +01002685 blockdev_remove_medium(has_device, device, has_id, id, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002686 if (err) {
2687 error_propagate(errp, err);
2688 goto fail;
2689 }
2690
Kevin Wolf716df212016-09-20 13:38:44 +02002691 qmp_blockdev_insert_anon_medium(blk, medium_bs, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002692 if (err) {
2693 error_propagate(errp, err);
2694 goto fail;
2695 }
2696
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002697 qmp_blockdev_close_tray(has_device, device, has_id, id, errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002698
2699fail:
2700 /* If the medium has been inserted, the device has its own reference, so
2701 * ours must be relinquished; and if it has not been inserted successfully,
2702 * the reference must be relinquished anyway */
2703 bdrv_unref(medium_bs);
2704}
2705
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002706/* throttling disk I/O limits */
Eric Blake4dc93972016-07-13 21:50:21 -06002707void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002708{
Benoît Canetcc0681c2013-09-02 14:14:39 +02002709 ThrottleConfig cfg;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002710 BlockDriverState *bs;
Fam Zhenga0e85442015-03-02 19:36:48 +08002711 BlockBackend *blk;
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002712 AioContext *aio_context;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002713
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002714 blk = qmp_get_blk(arg->has_device ? arg->device : NULL,
2715 arg->has_id ? arg->id : NULL,
2716 errp);
Fam Zhenga0e85442015-03-02 19:36:48 +08002717 if (!blk) {
Luiz Capitulino80047da2011-12-14 16:49:14 -02002718 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002719 }
Max Reitz5433c242015-10-19 17:53:29 +02002720
2721 aio_context = blk_get_aio_context(blk);
2722 aio_context_acquire(aio_context);
2723
Fam Zhenga0e85442015-03-02 19:36:48 +08002724 bs = blk_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002725 if (!bs) {
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002726 error_setg(errp, "Device has no medium");
Max Reitz5433c242015-10-19 17:53:29 +02002727 goto out;
2728 }
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002729
Alberto Garcia1588ab52016-02-18 12:27:00 +02002730 throttle_config_init(&cfg);
Eric Blake4dc93972016-07-13 21:50:21 -06002731 cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps;
2732 cfg.buckets[THROTTLE_BPS_READ].avg = arg->bps_rd;
2733 cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002734
Eric Blake4dc93972016-07-13 21:50:21 -06002735 cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops;
2736 cfg.buckets[THROTTLE_OPS_READ].avg = arg->iops_rd;
2737 cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr;
Benoît Canetcc0681c2013-09-02 14:14:39 +02002738
Eric Blake4dc93972016-07-13 21:50:21 -06002739 if (arg->has_bps_max) {
2740 cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002741 }
Eric Blake4dc93972016-07-13 21:50:21 -06002742 if (arg->has_bps_rd_max) {
2743 cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002744 }
Eric Blake4dc93972016-07-13 21:50:21 -06002745 if (arg->has_bps_wr_max) {
2746 cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002747 }
Eric Blake4dc93972016-07-13 21:50:21 -06002748 if (arg->has_iops_max) {
2749 cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002750 }
Eric Blake4dc93972016-07-13 21:50:21 -06002751 if (arg->has_iops_rd_max) {
2752 cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002753 }
Eric Blake4dc93972016-07-13 21:50:21 -06002754 if (arg->has_iops_wr_max) {
2755 cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002756 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002757
Eric Blake4dc93972016-07-13 21:50:21 -06002758 if (arg->has_bps_max_length) {
2759 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002760 }
Eric Blake4dc93972016-07-13 21:50:21 -06002761 if (arg->has_bps_rd_max_length) {
2762 cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002763 }
Eric Blake4dc93972016-07-13 21:50:21 -06002764 if (arg->has_bps_wr_max_length) {
2765 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002766 }
Eric Blake4dc93972016-07-13 21:50:21 -06002767 if (arg->has_iops_max_length) {
2768 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002769 }
Eric Blake4dc93972016-07-13 21:50:21 -06002770 if (arg->has_iops_rd_max_length) {
2771 cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002772 }
Eric Blake4dc93972016-07-13 21:50:21 -06002773 if (arg->has_iops_wr_max_length) {
2774 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002775 }
2776
Eric Blake4dc93972016-07-13 21:50:21 -06002777 if (arg->has_iops_size) {
2778 cfg.op_size = arg->iops_size;
Benoît Canet2024c1d2013-09-02 14:14:41 +02002779 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002780
Alberto Garciad5851082016-02-18 12:26:59 +02002781 if (!throttle_is_valid(&cfg, errp)) {
Max Reitz5433c242015-10-19 17:53:29 +02002782 goto out;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002783 }
2784
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002785 if (throttle_enabled(&cfg)) {
2786 /* Enable I/O limits if they're not enabled yet, otherwise
2787 * just update the throttling group. */
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002788 if (!blk_get_public(blk)->throttle_group_member.throttle_state) {
Eric Blake4dc93972016-07-13 21:50:21 -06002789 blk_io_limits_enable(blk,
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002790 arg->has_group ? arg->group :
2791 arg->has_device ? arg->device :
2792 arg->id);
Eric Blake4dc93972016-07-13 21:50:21 -06002793 } else if (arg->has_group) {
2794 blk_io_limits_update_group(blk, arg->group);
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002795 }
2796 /* Set the new throttling configuration */
Kevin Wolf97148072016-03-21 13:53:52 +01002797 blk_set_io_limits(blk, &cfg);
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002798 } else if (blk_get_public(blk)->throttle_group_member.throttle_state) {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002799 /* If all throttling settings are set to 0, disable I/O limits */
Kevin Wolf97148072016-03-21 13:53:52 +01002800 blk_io_limits_disable(blk);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002801 }
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002802
Max Reitz5433c242015-10-19 17:53:29 +02002803out:
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002804 aio_context_release(aio_context);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002805}
2806
John Snow341ebc22015-04-17 19:49:52 -04002807void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2808 bool has_granularity, uint32_t granularity,
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002809 bool has_persistent, bool persistent,
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002810 bool has_autoload, bool autoload,
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002811 bool has_disabled, bool disabled,
John Snow341ebc22015-04-17 19:49:52 -04002812 Error **errp)
2813{
John Snow341ebc22015-04-17 19:49:52 -04002814 BlockDriverState *bs;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002815 BdrvDirtyBitmap *bitmap;
John Snow0a6c86d2019-02-19 17:49:43 -05002816 AioContext *aio_context = NULL;
John Snow341ebc22015-04-17 19:49:52 -04002817
2818 if (!name || name[0] == '\0') {
2819 error_setg(errp, "Bitmap name cannot be empty");
2820 return;
2821 }
2822
2823 bs = bdrv_lookup_bs(node, node, errp);
2824 if (!bs) {
2825 return;
2826 }
2827
John Snow341ebc22015-04-17 19:49:52 -04002828 if (has_granularity) {
2829 if (granularity < 512 || !is_power_of_2(granularity)) {
2830 error_setg(errp, "Granularity must be power of 2 "
2831 "and at least 512");
Paolo Bonzini21198822017-06-05 14:39:03 +02002832 return;
John Snow341ebc22015-04-17 19:49:52 -04002833 }
2834 } else {
2835 /* Default to cluster size, if available: */
2836 granularity = bdrv_get_default_bitmap_granularity(bs);
2837 }
2838
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002839 if (!has_persistent) {
2840 persistent = false;
2841 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002842
Vladimir Sementsov-Ogievskiy3e99da52018-02-02 19:07:52 +03002843 if (has_autoload) {
2844 warn_report("Autoload option is deprecated and its value is ignored");
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002845 }
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002846
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002847 if (!has_disabled) {
2848 disabled = false;
2849 }
2850
John Snow0a6c86d2019-02-19 17:49:43 -05002851 if (persistent) {
2852 aio_context = bdrv_get_aio_context(bs);
2853 aio_context_acquire(aio_context);
2854 if (!bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp)) {
2855 goto out;
2856 }
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002857 }
2858
2859 bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp);
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002860 if (bitmap == NULL) {
John Snow0a6c86d2019-02-19 17:49:43 -05002861 goto out;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002862 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002863
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002864 if (disabled) {
2865 bdrv_disable_dirty_bitmap(bitmap);
2866 }
2867
Eric Blake796a3792019-03-12 12:05:49 -04002868 bdrv_dirty_bitmap_set_persistence(bitmap, persistent);
John Snow0a6c86d2019-02-19 17:49:43 -05002869 out:
2870 if (aio_context) {
2871 aio_context_release(aio_context);
2872 }
John Snow341ebc22015-04-17 19:49:52 -04002873}
2874
2875void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2876 Error **errp)
2877{
John Snow341ebc22015-04-17 19:49:52 -04002878 BlockDriverState *bs;
2879 BdrvDirtyBitmap *bitmap;
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002880 Error *local_err = NULL;
John Snow0a6c86d2019-02-19 17:49:43 -05002881 AioContext *aio_context = NULL;
John Snow341ebc22015-04-17 19:49:52 -04002882
Paolo Bonzini21198822017-06-05 14:39:03 +02002883 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snow341ebc22015-04-17 19:49:52 -04002884 if (!bitmap || !bs) {
2885 return;
2886 }
2887
John Snowc3edf132019-03-12 12:05:49 -04002888 if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_BUSY | BDRV_BITMAP_RO,
2889 errp)) {
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04002890 return;
John Snow9bd2b082015-04-17 19:49:57 -04002891 }
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002892
Eric Blake796a3792019-03-12 12:05:49 -04002893 if (bdrv_dirty_bitmap_get_persistence(bitmap)) {
John Snow0a6c86d2019-02-19 17:49:43 -05002894 aio_context = bdrv_get_aio_context(bs);
2895 aio_context_acquire(aio_context);
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002896 bdrv_remove_persistent_dirty_bitmap(bs, name, &local_err);
2897 if (local_err != NULL) {
2898 error_propagate(errp, local_err);
John Snow0a6c86d2019-02-19 17:49:43 -05002899 goto out;
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002900 }
2901 }
2902
John Snow341ebc22015-04-17 19:49:52 -04002903 bdrv_release_dirty_bitmap(bs, bitmap);
John Snow0a6c86d2019-02-19 17:49:43 -05002904 out:
2905 if (aio_context) {
2906 aio_context_release(aio_context);
2907 }
John Snow341ebc22015-04-17 19:49:52 -04002908}
2909
John Snowe74e6b72015-04-17 19:49:59 -04002910/**
2911 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2912 * immediately after a full backup operation.
2913 */
2914void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2915 Error **errp)
2916{
John Snowe74e6b72015-04-17 19:49:59 -04002917 BdrvDirtyBitmap *bitmap;
2918 BlockDriverState *bs;
2919
Paolo Bonzini21198822017-06-05 14:39:03 +02002920 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snowe74e6b72015-04-17 19:49:59 -04002921 if (!bitmap || !bs) {
2922 return;
2923 }
2924
John Snow3ae96d62019-03-12 12:05:49 -04002925 if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_DEFAULT, errp)) {
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002926 return;
John Snowe74e6b72015-04-17 19:49:59 -04002927 }
2928
Fam Zhengdf9a6812015-11-09 18:16:54 +08002929 bdrv_clear_dirty_bitmap(bitmap, NULL);
John Snowe74e6b72015-04-17 19:49:59 -04002930}
2931
John Snow0e2b7f02018-12-21 04:35:22 -05002932void qmp_block_dirty_bitmap_enable(const char *node, const char *name,
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002933 Error **errp)
2934{
2935 BlockDriverState *bs;
2936 BdrvDirtyBitmap *bitmap;
2937
2938 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
2939 if (!bitmap) {
2940 return;
2941 }
2942
John Snow3ae96d62019-03-12 12:05:49 -04002943 if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002944 return;
2945 }
2946
2947 bdrv_enable_dirty_bitmap(bitmap);
2948}
2949
John Snow0e2b7f02018-12-21 04:35:22 -05002950void qmp_block_dirty_bitmap_disable(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 Snow3ae96d62019-03-12 12:05:49 -04002961 if (bdrv_dirty_bitmap_check(bitmap, BDRV_BITMAP_ALLOW_RO, errp)) {
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002962 return;
2963 }
2964
2965 bdrv_disable_dirty_bitmap(bitmap);
2966}
2967
John Snow360d4e42018-12-21 04:35:21 -05002968static BdrvDirtyBitmap *do_block_dirty_bitmap_merge(const char *node,
2969 const char *target,
2970 strList *bitmaps,
2971 HBitmap **backup,
2972 Error **errp)
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002973{
2974 BlockDriverState *bs;
John Snow360d4e42018-12-21 04:35:21 -05002975 BdrvDirtyBitmap *dst, *src, *anon;
2976 strList *lst;
2977 Error *local_err = NULL;
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002978
John Snow360d4e42018-12-21 04:35:21 -05002979 dst = block_dirty_bitmap_lookup(node, target, &bs, errp);
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002980 if (!dst) {
John Snow360d4e42018-12-21 04:35:21 -05002981 return NULL;
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002982 }
2983
John Snow360d4e42018-12-21 04:35:21 -05002984 anon = bdrv_create_dirty_bitmap(bs, bdrv_dirty_bitmap_granularity(dst),
2985 NULL, errp);
2986 if (!anon) {
2987 return NULL;
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002988 }
2989
John Snow360d4e42018-12-21 04:35:21 -05002990 for (lst = bitmaps; lst; lst = lst->next) {
2991 src = bdrv_find_dirty_bitmap(bs, lst->value);
2992 if (!src) {
2993 error_setg(errp, "Dirty bitmap '%s' not found", lst->value);
2994 dst = NULL;
2995 goto out;
2996 }
2997
2998 bdrv_merge_dirty_bitmap(anon, src, NULL, &local_err);
2999 if (local_err) {
3000 error_propagate(errp, local_err);
3001 dst = NULL;
3002 goto out;
3003 }
3004 }
3005
3006 /* Merge into dst; dst is unchanged on failure. */
3007 bdrv_merge_dirty_bitmap(dst, anon, backup, errp);
3008
3009 out:
3010 bdrv_release_dirty_bitmap(bs, anon);
3011 return dst;
3012}
3013
John Snow0e2b7f02018-12-21 04:35:22 -05003014void qmp_block_dirty_bitmap_merge(const char *node, const char *target,
3015 strList *bitmaps, Error **errp)
John Snow360d4e42018-12-21 04:35:21 -05003016{
3017 do_block_dirty_bitmap_merge(node, target, bitmaps, NULL, errp);
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04003018}
3019
Vladimir Sementsov-Ogievskiya3b52532017-06-28 15:05:25 +03003020BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
3021 const char *name,
3022 Error **errp)
3023{
3024 BdrvDirtyBitmap *bitmap;
3025 BlockDriverState *bs;
3026 BlockDirtyBitmapSha256 *ret = NULL;
3027 char *sha256;
3028
3029 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
3030 if (!bitmap || !bs) {
3031 return NULL;
3032 }
3033
3034 sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp);
3035 if (sha256 == NULL) {
3036 return NULL;
3037 }
3038
3039 ret = g_new(BlockDirtyBitmapSha256, 1);
3040 ret->sha256 = sha256;
3041
3042 return ret;
3043}
3044
Markus Armbruster072ebe62015-03-05 17:00:56 +01003045void hmp_drive_del(Monitor *mon, const QDict *qdict)
Ryan Harper9063f812010-11-12 11:07:13 -06003046{
3047 const char *id = qdict_get_str(qdict, "id");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02003048 BlockBackend *blk;
Ryan Harper9063f812010-11-12 11:07:13 -06003049 BlockDriverState *bs;
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003050 AioContext *aio_context;
Fam Zheng3718d8a2014-05-23 21:29:43 +08003051 Error *local_err = NULL;
Ryan Harper9063f812010-11-12 11:07:13 -06003052
Kevin Wolf2073d412016-02-23 17:50:37 +01003053 bs = bdrv_find_node(id);
3054 if (bs) {
Markus Armbruster79b7a772017-03-21 17:53:28 +01003055 qmp_blockdev_del(id, &local_err);
Kevin Wolf2073d412016-02-23 17:50:37 +01003056 if (local_err) {
3057 error_report_err(local_err);
3058 }
3059 return;
3060 }
3061
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02003062 blk = blk_by_name(id);
3063 if (!blk) {
Markus Armbrusterb1422f22014-05-16 11:00:09 +02003064 error_report("Device '%s' not found", id);
Markus Armbruster072ebe62015-03-05 17:00:56 +01003065 return;
Ryan Harper9063f812010-11-12 11:07:13 -06003066 }
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003067
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02003068 if (!blk_legacy_dinfo(blk)) {
Markus Armbruster48f364d2014-09-11 16:45:39 +02003069 error_report("Deleting device added with blockdev-add"
3070 " is not supported");
Markus Armbruster072ebe62015-03-05 17:00:56 +01003071 return;
Markus Armbruster48f364d2014-09-11 16:45:39 +02003072 }
3073
Max Reitz5433c242015-10-19 17:53:29 +02003074 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003075 aio_context_acquire(aio_context);
3076
Max Reitz5433c242015-10-19 17:53:29 +02003077 bs = blk_bs(blk);
3078 if (bs) {
3079 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
3080 error_report_err(local_err);
3081 aio_context_release(aio_context);
3082 return;
3083 }
Ryan Harper9063f812010-11-12 11:07:13 -06003084
Max Reitz938abd42016-01-29 16:36:09 +01003085 blk_remove_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02003086 }
Ryan Harper9063f812010-11-12 11:07:13 -06003087
Max Reitz7c735872016-03-16 19:54:39 +01003088 /* Make the BlockBackend and the attached BlockDriverState anonymous */
Max Reitzefaa7c42016-03-16 19:54:38 +01003089 monitor_remove_blk(blk);
3090
Max Reitz7c735872016-03-16 19:54:39 +01003091 /* If this BlockBackend has a device attached to it, its refcount will be
3092 * decremented when the device is removed; otherwise we have to do so here.
Ryan Harperd22b2f42011-03-29 20:51:47 -05003093 */
Markus Armbrustera7f53e22014-10-07 13:59:25 +02003094 if (blk_get_attached_dev(blk)) {
Stefan Hajnoczi293c51a2013-06-05 10:33:14 +02003095 /* Further I/O must not pause the guest */
Max Reitz373340b2015-10-19 17:53:22 +02003096 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
3097 BLOCKDEV_ON_ERROR_REPORT);
Ryan Harperd22b2f42011-03-29 20:51:47 -05003098 } else {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +02003099 blk_unref(blk);
Ryan Harper9063f812010-11-12 11:07:13 -06003100 }
3101
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003102 aio_context_release(aio_context);
Ryan Harper9063f812010-11-12 11:07:13 -06003103}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003104
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003105void qmp_block_resize(bool has_device, const char *device,
3106 bool has_node_name, const char *node_name,
3107 int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003108{
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003109 Error *local_err = NULL;
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003110 BlockBackend *blk = NULL;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003111 BlockDriverState *bs;
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003112 AioContext *aio_context;
Kevin Wolf87329012013-05-02 15:32:55 +02003113 int ret;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003114
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003115 bs = bdrv_lookup_bs(has_device ? device : NULL,
3116 has_node_name ? node_name : NULL,
3117 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003118 if (local_err) {
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003119 error_propagate(errp, local_err);
3120 return;
3121 }
3122
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003123 aio_context = bdrv_get_aio_context(bs);
3124 aio_context_acquire(aio_context);
3125
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003126 if (!bdrv_is_first_non_filter(bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003127 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003128 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003129 }
3130
3131 if (size < 0) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003132 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003133 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003134 }
3135
Jeff Cody9c75e162014-06-25 16:55:30 -04003136 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003137 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003138 goto out;
Jeff Cody9c75e162014-06-25 16:55:30 -04003139 }
3140
Kevin Wolf6d0eb642017-01-20 17:07:26 +01003141 blk = blk_new(BLK_PERM_RESIZE, BLK_PERM_ALL);
Kevin Wolfd7086422017-01-13 19:02:32 +01003142 ret = blk_insert_bs(blk, bs, errp);
3143 if (ret < 0) {
3144 goto out;
3145 }
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003146
John Snow698bdfa2017-05-10 13:39:45 -04003147 bdrv_drained_begin(bs);
Max Reitz3a691c52017-06-13 22:20:54 +02003148 ret = blk_truncate(blk, size, PREALLOC_MODE_OFF, errp);
John Snow698bdfa2017-05-10 13:39:45 -04003149 bdrv_drained_end(bs);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003150
3151out:
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003152 blk_unref(blk);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003153 aio_context_release(aio_context);
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003154}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003155
Alberto Garcia23233222016-07-05 17:28:59 +03003156void qmp_block_stream(bool has_job_id, const char *job_id, const char *device,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003157 bool has_base, const char *base,
Alberto Garcia312fe092016-10-28 10:08:19 +03003158 bool has_base_node, const char *base_node,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003159 bool has_backing_file, const char *backing_file,
3160 bool has_speed, int64_t speed,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003161 bool has_on_error, BlockdevOnError on_error,
John Snow241ca1a2018-09-06 09:02:23 -04003162 bool has_auto_finalize, bool auto_finalize,
3163 bool has_auto_dismiss, bool auto_dismiss,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003164 Error **errp)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003165{
Alberto Garcia554b6142016-10-28 10:08:11 +03003166 BlockDriverState *bs, *iter;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003167 BlockDriverState *base_bs = NULL;
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003168 AioContext *aio_context;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003169 Error *local_err = NULL;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003170 const char *base_name = NULL;
John Snowcf6320d2018-09-06 09:02:12 -04003171 int job_flags = JOB_DEFAULT;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003172
Paolo Bonzini1d809092012-09-28 17:22:59 +02003173 if (!has_on_error) {
3174 on_error = BLOCKDEV_ON_ERROR_REPORT;
3175 }
3176
Alberto Garcia554b6142016-10-28 10:08:11 +03003177 bs = bdrv_lookup_bs(device, device, errp);
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003178 if (!bs) {
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003179 return;
3180 }
3181
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003182 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003183 aio_context_acquire(aio_context);
3184
Alberto Garcia312fe092016-10-28 10:08:19 +03003185 if (has_base && has_base_node) {
3186 error_setg(errp, "'base' and 'base-node' cannot be specified "
3187 "at the same time");
3188 goto out;
3189 }
3190
Jeff Cody13d8cc52014-06-25 15:40:11 -04003191 if (has_base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003192 base_bs = bdrv_find_backing_image(bs, base);
3193 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003194 error_setg(errp, QERR_BASE_NOT_FOUND, base);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003195 goto out;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003196 }
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003197 assert(bdrv_get_aio_context(base_bs) == aio_context);
Jeff Cody13d8cc52014-06-25 15:40:11 -04003198 base_name = base;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003199 }
3200
Alberto Garcia312fe092016-10-28 10:08:19 +03003201 if (has_base_node) {
3202 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
3203 if (!base_bs) {
3204 goto out;
3205 }
3206 if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) {
3207 error_setg(errp, "Node '%s' is not a backing image of '%s'",
3208 base_node, device);
3209 goto out;
3210 }
3211 assert(bdrv_get_aio_context(base_bs) == aio_context);
Max Reitzf30c66b2019-02-01 20:29:05 +01003212 bdrv_refresh_filename(base_bs);
Alberto Garcia312fe092016-10-28 10:08:19 +03003213 base_name = base_bs->filename;
3214 }
3215
Alberto Garcia554b6142016-10-28 10:08:11 +03003216 /* Check for op blockers in the whole chain between bs and base */
3217 for (iter = bs; iter && iter != base_bs; iter = backing_bs(iter)) {
3218 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
3219 goto out;
3220 }
3221 }
3222
Jeff Cody13d8cc52014-06-25 15:40:11 -04003223 /* if we are streaming the entire chain, the result will have no backing
3224 * file, and specifying one is therefore an error */
3225 if (base_bs == NULL && has_backing_file) {
3226 error_setg(errp, "backing file specified, but streaming the "
3227 "entire chain");
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003228 goto out;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003229 }
3230
3231 /* backing_file string overrides base bs filename */
3232 base_name = has_backing_file ? backing_file : base_name;
3233
John Snow241ca1a2018-09-06 09:02:23 -04003234 if (has_auto_finalize && !auto_finalize) {
3235 job_flags |= JOB_MANUAL_FINALIZE;
3236 }
3237 if (has_auto_dismiss && !auto_dismiss) {
3238 job_flags |= JOB_MANUAL_DISMISS;
3239 }
3240
Alberto Garcia23233222016-07-05 17:28:59 +03003241 stream_start(has_job_id ? job_id : NULL, bs, base_bs, base_name,
John Snowcf6320d2018-09-06 09:02:12 -04003242 job_flags, has_speed ? speed : 0, on_error, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003243 if (local_err) {
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003244 error_propagate(errp, local_err);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003245 goto out;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003246 }
3247
3248 trace_qmp_block_stream(bs, bs->job);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003249
3250out:
3251 aio_context_release(aio_context);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003252}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003253
Alberto Garciafd62c602016-07-05 17:29:00 +03003254void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
Kevin Wolf3c605f42017-06-27 17:18:20 +02003255 bool has_base_node, const char *base_node,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003256 bool has_base, const char *base,
Kevin Wolf3c605f42017-06-27 17:18:20 +02003257 bool has_top_node, const char *top_node,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003258 bool has_top, const char *top,
Jeff Cody54e26902014-06-25 15:40:10 -04003259 bool has_backing_file, const char *backing_file,
Jeff Codyed61fc12012-09-27 13:29:16 -04003260 bool has_speed, int64_t speed,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003261 bool has_filter_node_name, const char *filter_node_name,
John Snow96fbf532018-09-06 09:02:21 -04003262 bool has_auto_finalize, bool auto_finalize,
3263 bool has_auto_dismiss, bool auto_dismiss,
Jeff Codyed61fc12012-09-27 13:29:16 -04003264 Error **errp)
3265{
3266 BlockDriverState *bs;
Alberto Garcia058223a2016-10-28 10:08:07 +03003267 BlockDriverState *iter;
Jeff Codyed61fc12012-09-27 13:29:16 -04003268 BlockDriverState *base_bs, *top_bs;
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003269 AioContext *aio_context;
Jeff Codyed61fc12012-09-27 13:29:16 -04003270 Error *local_err = NULL;
3271 /* This will be part of the QMP command, if/when the
3272 * BlockdevOnError change for blkmirror makes it in
3273 */
Paolo Bonzini92aa5c62012-09-28 17:22:55 +02003274 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
John Snow53607822018-09-06 09:02:10 -04003275 int job_flags = JOB_DEFAULT;
Jeff Codyed61fc12012-09-27 13:29:16 -04003276
Max Reitz54504662014-04-10 19:36:25 +02003277 if (!has_speed) {
3278 speed = 0;
3279 }
Kevin Wolf0db832f2017-02-20 18:10:05 +01003280 if (!has_filter_node_name) {
3281 filter_node_name = NULL;
3282 }
John Snow96fbf532018-09-06 09:02:21 -04003283 if (has_auto_finalize && !auto_finalize) {
3284 job_flags |= JOB_MANUAL_FINALIZE;
3285 }
3286 if (has_auto_dismiss && !auto_dismiss) {
3287 job_flags |= JOB_MANUAL_DISMISS;
3288 }
Max Reitz54504662014-04-10 19:36:25 +02003289
Jeff Cody7676e2c2014-06-30 15:14:15 +02003290 /* Important Note:
3291 * libvirt relies on the DeviceNotFound error class in order to probe for
3292 * live commit feature versions; for this to work, we must make sure to
3293 * perform the device lookup before any generic errors that may occur in a
3294 * scenario in which all optional arguments are omitted. */
Kevin Wolf1d13b162016-06-23 14:20:24 +02003295 bs = qmp_get_root_bs(device, &local_err);
3296 if (!bs) {
3297 bs = bdrv_lookup_bs(device, device, NULL);
3298 if (!bs) {
3299 error_free(local_err);
3300 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3301 "Device '%s' not found", device);
3302 } else {
3303 error_propagate(errp, local_err);
3304 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003305 return;
3306 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003307
Kevin Wolf1d13b162016-06-23 14:20:24 +02003308 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003309 aio_context_acquire(aio_context);
3310
Fam Zhengbb000212014-09-11 13:14:00 +08003311 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003312 goto out;
Fam Zheng628ff682014-05-23 21:29:44 +08003313 }
3314
Jeff Codyed61fc12012-09-27 13:29:16 -04003315 /* default top_bs is the active layer */
3316 top_bs = bs;
3317
Kevin Wolf3c605f42017-06-27 17:18:20 +02003318 if (has_top_node && has_top) {
3319 error_setg(errp, "'top-node' and 'top' are mutually exclusive");
3320 goto out;
3321 } else if (has_top_node) {
3322 top_bs = bdrv_lookup_bs(NULL, top_node, errp);
3323 if (top_bs == NULL) {
3324 goto out;
3325 }
3326 if (!bdrv_chain_contains(bs, top_bs)) {
3327 error_setg(errp, "'%s' is not in this backing file chain",
3328 top_node);
3329 goto out;
3330 }
3331 } else if (has_top && top) {
Max Reitzf30c66b2019-02-01 20:29:05 +01003332 /* This strcmp() is just a shortcut, there is no need to
3333 * refresh @bs's filename. If it mismatches,
3334 * bdrv_find_backing_image() will do the refresh and may still
3335 * return @bs. */
Jeff Codyed61fc12012-09-27 13:29:16 -04003336 if (strcmp(bs->filename, top) != 0) {
3337 top_bs = bdrv_find_backing_image(bs, top);
3338 }
3339 }
3340
3341 if (top_bs == NULL) {
3342 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003343 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003344 }
3345
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003346 assert(bdrv_get_aio_context(top_bs) == aio_context);
3347
Kevin Wolf3c605f42017-06-27 17:18:20 +02003348 if (has_base_node && has_base) {
3349 error_setg(errp, "'base-node' and 'base' are mutually exclusive");
3350 goto out;
3351 } else if (has_base_node) {
3352 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
3353 if (base_bs == NULL) {
3354 goto out;
3355 }
3356 if (!bdrv_chain_contains(top_bs, base_bs)) {
3357 error_setg(errp, "'%s' is not in this backing file chain",
3358 base_node);
3359 goto out;
3360 }
3361 } else if (has_base && base) {
Jeff Codyd5208c42012-10-16 15:49:10 -04003362 base_bs = bdrv_find_backing_image(top_bs, base);
3363 } else {
3364 base_bs = bdrv_find_base(top_bs);
3365 }
3366
3367 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003368 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003369 goto out;
Jeff Codyd5208c42012-10-16 15:49:10 -04003370 }
3371
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003372 assert(bdrv_get_aio_context(base_bs) == aio_context);
3373
Alberto Garcia058223a2016-10-28 10:08:07 +03003374 for (iter = top_bs; iter != backing_bs(base_bs); iter = backing_bs(iter)) {
3375 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3376 goto out;
3377 }
Fam Zhengbb000212014-09-11 13:14:00 +08003378 }
3379
Jeff Cody7676e2c2014-06-30 15:14:15 +02003380 /* Do not allow attempts to commit an image into itself */
3381 if (top_bs == base_bs) {
3382 error_setg(errp, "cannot commit an image into itself");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003383 goto out;
Jeff Cody7676e2c2014-06-30 15:14:15 +02003384 }
3385
Fam Zheng20a63d22013-12-16 14:45:31 +08003386 if (top_bs == bs) {
Jeff Cody54e26902014-06-25 15:40:10 -04003387 if (has_backing_file) {
3388 error_setg(errp, "'backing-file' specified,"
3389 " but 'top' is the active layer");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003390 goto out;
Jeff Cody54e26902014-06-25 15:40:10 -04003391 }
John Snow47970df2016-10-27 12:06:57 -04003392 commit_active_start(has_job_id ? job_id : NULL, bs, base_bs,
John Snow53607822018-09-06 09:02:10 -04003393 job_flags, speed, on_error,
Fam Zheng78bbd912017-04-21 20:27:04 +08003394 filter_node_name, NULL, NULL, false, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003395 } else {
Alberto Garcia058223a2016-10-28 10:08:07 +03003396 BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
3397 if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3398 goto out;
3399 }
John Snow53607822018-09-06 09:02:10 -04003400 commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, job_flags,
3401 speed, on_error, has_backing_file ? backing_file : NULL,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003402 filter_node_name, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003403 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003404 if (local_err != NULL) {
3405 error_propagate(errp, local_err);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003406 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003407 }
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003408
3409out:
3410 aio_context_release(aio_context);
Jeff Codyed61fc12012-09-27 13:29:16 -04003411}
3412
Kevin Wolf62c9e412018-04-19 16:09:52 +02003413static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
John Snow111049a2016-11-08 01:50:38 -05003414 Error **errp)
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003415{
3416 BlockDriverState *bs;
3417 BlockDriverState *target_bs;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003418 BlockDriverState *source = NULL;
John Snow111049a2016-11-08 01:50:38 -05003419 BlockJob *job = NULL;
John Snowd58d8452015-04-17 19:49:58 -04003420 BdrvDirtyBitmap *bmap = NULL;
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003421 AioContext *aio_context;
Max Reitze6641712015-08-26 19:47:48 +02003422 QDict *options = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003423 Error *local_err = NULL;
Kevin Wolfbb02b652018-04-19 17:54:56 +02003424 int flags, job_flags = JOB_DEFAULT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003425 int64_t size;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003426 bool set_backing_hd = false;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003427
Pavel Butsykin81206a82016-07-22 11:17:50 +03003428 if (!backup->has_speed) {
3429 backup->speed = 0;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003430 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003431 if (!backup->has_on_source_error) {
3432 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003433 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003434 if (!backup->has_on_target_error) {
3435 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003436 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003437 if (!backup->has_mode) {
3438 backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3439 }
3440 if (!backup->has_job_id) {
3441 backup->job_id = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003442 }
John Snowb40dacd2018-03-10 03:27:44 -05003443 if (!backup->has_auto_finalize) {
3444 backup->auto_finalize = true;
3445 }
3446 if (!backup->has_auto_dismiss) {
3447 backup->auto_dismiss = true;
3448 }
Pavel Butsykin13b94142016-07-22 11:17:52 +03003449 if (!backup->has_compress) {
3450 backup->compress = false;
3451 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003452
Pavel Butsykin81206a82016-07-22 11:17:50 +03003453 bs = qmp_get_root_bs(backup->device, errp);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003454 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003455 return NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003456 }
3457
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003458 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003459 aio_context_acquire(aio_context);
3460
Pavel Butsykin81206a82016-07-22 11:17:50 +03003461 if (!backup->has_format) {
3462 backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ?
3463 NULL : (char*) bs->drv->format_name;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003464 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003465
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003466 /* Early check to avoid creating target */
Fam Zheng3718d8a2014-05-23 21:29:43 +08003467 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003468 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003469 }
3470
Kevin Wolf61de4c62016-03-18 17:46:45 +01003471 flags = bs->open_flags | BDRV_O_RDWR;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003472
Ian Mainfc5d3f82013-07-26 11:39:04 -07003473 /* See if we have a backing HD we can use to create our new image
3474 * on top of. */
Pavel Butsykin81206a82016-07-22 11:17:50 +03003475 if (backup->sync == MIRROR_SYNC_MODE_TOP) {
Kevin Wolf760e0062015-06-17 14:55:21 +02003476 source = backing_bs(bs);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003477 if (!source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003478 backup->sync = MIRROR_SYNC_MODE_FULL;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003479 }
3480 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003481 if (backup->sync == MIRROR_SYNC_MODE_NONE) {
Ian Mainfc5d3f82013-07-26 11:39:04 -07003482 source = bs;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003483 flags |= BDRV_O_NO_BACKING;
3484 set_backing_hd = true;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003485 }
3486
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003487 size = bdrv_getlength(bs);
3488 if (size < 0) {
3489 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003490 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003491 }
3492
Pavel Butsykin81206a82016-07-22 11:17:50 +03003493 if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
3494 assert(backup->format);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003495 if (source) {
Max Reitzf30c66b2019-02-01 20:29:05 +01003496 bdrv_refresh_filename(source);
Pavel Butsykin81206a82016-07-22 11:17:50 +03003497 bdrv_img_create(backup->target, backup->format, source->filename,
Ian Mainfc5d3f82013-07-26 11:39:04 -07003498 source->drv->format_name, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003499 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003500 } else {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003501 bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003502 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003503 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003504 }
3505
Markus Armbruster84d18f02014-01-30 15:07:28 +01003506 if (local_err) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003507 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003508 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003509 }
3510
Pavel Butsykin81206a82016-07-22 11:17:50 +03003511 if (backup->format) {
Fam Zhengfc0932f2017-05-03 00:35:53 +08003512 if (!options) {
3513 options = qdict_new();
3514 }
Eric Blake46f5ac22017-04-27 16:58:17 -05003515 qdict_put_str(options, "driver", backup->format);
Max Reitze6641712015-08-26 19:47:48 +02003516 }
3517
Pavel Butsykin81206a82016-07-22 11:17:50 +03003518 target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003519 if (!target_bs) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003520 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003521 }
3522
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003523 bdrv_set_aio_context(target_bs, aio_context);
3524
Fam Zhengfc0932f2017-05-03 00:35:53 +08003525 if (set_backing_hd) {
3526 bdrv_set_backing_hd(target_bs, source, &local_err);
3527 if (local_err) {
3528 bdrv_unref(target_bs);
3529 goto out;
3530 }
3531 }
3532
Pavel Butsykin81206a82016-07-22 11:17:50 +03003533 if (backup->has_bitmap) {
3534 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
John Snowd58d8452015-04-17 19:49:58 -04003535 if (!bmap) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003536 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
Max Reitz0702d3d2015-11-09 23:39:10 +01003537 bdrv_unref(target_bs);
John Snowd58d8452015-04-17 19:49:58 -04003538 goto out;
3539 }
John Snowa54a0c12019-03-12 12:05:49 -04003540 if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_DEFAULT, errp)) {
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04003541 goto out;
3542 }
John Snowd58d8452015-04-17 19:49:58 -04003543 }
John Snowb40dacd2018-03-10 03:27:44 -05003544 if (!backup->auto_finalize) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003545 job_flags |= JOB_MANUAL_FINALIZE;
John Snowb40dacd2018-03-10 03:27:44 -05003546 }
3547 if (!backup->auto_dismiss) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003548 job_flags |= JOB_MANUAL_DISMISS;
John Snowb40dacd2018-03-10 03:27:44 -05003549 }
John Snowd58d8452015-04-17 19:49:58 -04003550
John Snow111049a2016-11-08 01:50:38 -05003551 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
3552 backup->sync, bmap, backup->compress,
3553 backup->on_source_error, backup->on_target_error,
John Snowb40dacd2018-03-10 03:27:44 -05003554 job_flags, NULL, NULL, txn, &local_err);
Kevin Wolf5c438bc2016-04-14 13:09:53 +02003555 bdrv_unref(target_bs);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003556 if (local_err != NULL) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003557 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003558 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003559 }
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003560
3561out:
3562 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003563 return job;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003564}
3565
Pavel Butsykin81206a82016-07-22 11:17:50 +03003566void qmp_drive_backup(DriveBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003567{
John Snow111049a2016-11-08 01:50:38 -05003568
3569 BlockJob *job;
3570 job = do_drive_backup(arg, NULL, errp);
3571 if (job) {
Kevin Wolfda01ff72018-04-13 17:31:02 +02003572 job_start(&job->job);
John Snow111049a2016-11-08 01:50:38 -05003573 }
John Snow78f51fd2015-11-05 18:13:17 -05003574}
3575
Benoît Canetc13163f2014-01-23 21:31:34 +01003576BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3577{
Alberto Garciad5a8ee62015-04-17 14:52:43 +03003578 return bdrv_named_nodes_list(errp);
Benoît Canetc13163f2014-01-23 21:31:34 +01003579}
3580
Vladimir Sementsov-Ogievskiy5d3b4e92018-12-21 20:09:07 +03003581XDbgBlockGraph *qmp_x_debug_query_block_graph(Error **errp)
3582{
3583 return bdrv_get_xdbg_block_graph(errp);
3584}
3585
Kevin Wolf62c9e412018-04-19 16:09:52 +02003586BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
John Snow111049a2016-11-08 01:50:38 -05003587 Error **errp)
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003588{
3589 BlockDriverState *bs;
3590 BlockDriverState *target_bs;
3591 Error *local_err = NULL;
John Snow945c1ee2018-10-29 16:23:14 -04003592 BdrvDirtyBitmap *bmap = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003593 AioContext *aio_context;
John Snow111049a2016-11-08 01:50:38 -05003594 BlockJob *job = NULL;
Kevin Wolfbb02b652018-04-19 17:54:56 +02003595 int job_flags = JOB_DEFAULT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003596
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003597 if (!backup->has_speed) {
3598 backup->speed = 0;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003599 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003600 if (!backup->has_on_source_error) {
3601 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003602 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003603 if (!backup->has_on_target_error) {
3604 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3605 }
3606 if (!backup->has_job_id) {
3607 backup->job_id = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003608 }
John Snowb40dacd2018-03-10 03:27:44 -05003609 if (!backup->has_auto_finalize) {
3610 backup->auto_finalize = true;
3611 }
3612 if (!backup->has_auto_dismiss) {
3613 backup->auto_dismiss = true;
3614 }
Pavel Butsykin3b7b1232016-07-22 11:17:53 +03003615 if (!backup->has_compress) {
3616 backup->compress = false;
3617 }
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003618
Vladimir Sementsov-Ogievskiy930fe172018-07-02 15:46:29 -04003619 bs = bdrv_lookup_bs(backup->device, backup->device, errp);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003620 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003621 return NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003622 }
3623
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003624 aio_context = bdrv_get_aio_context(bs);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003625 aio_context_acquire(aio_context);
3626
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003627 target_bs = bdrv_lookup_bs(backup->target, backup->target, errp);
Fam Zheng0d978912016-05-23 10:19:35 +08003628 if (!target_bs) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003629 goto out;
3630 }
Max Reitz5433c242015-10-19 17:53:29 +02003631
Fam Zhengefd75562016-05-23 10:19:36 +08003632 if (bdrv_get_aio_context(target_bs) != aio_context) {
3633 if (!bdrv_has_blk(target_bs)) {
3634 /* The target BDS is not attached, we can safely move it to another
3635 * AioContext. */
3636 bdrv_set_aio_context(target_bs, aio_context);
3637 } else {
3638 error_setg(errp, "Target is attached to a different thread from "
3639 "source.");
3640 goto out;
3641 }
3642 }
John Snow945c1ee2018-10-29 16:23:14 -04003643
3644 if (backup->has_bitmap) {
3645 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
3646 if (!bmap) {
3647 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
3648 goto out;
3649 }
John Snowa54a0c12019-03-12 12:05:49 -04003650 if (bdrv_dirty_bitmap_check(bmap, BDRV_BITMAP_DEFAULT, errp)) {
John Snow945c1ee2018-10-29 16:23:14 -04003651 goto out;
3652 }
3653 }
3654
John Snowb40dacd2018-03-10 03:27:44 -05003655 if (!backup->auto_finalize) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003656 job_flags |= JOB_MANUAL_FINALIZE;
John Snowb40dacd2018-03-10 03:27:44 -05003657 }
3658 if (!backup->auto_dismiss) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003659 job_flags |= JOB_MANUAL_DISMISS;
John Snowb40dacd2018-03-10 03:27:44 -05003660 }
John Snow111049a2016-11-08 01:50:38 -05003661 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
John Snow945c1ee2018-10-29 16:23:14 -04003662 backup->sync, bmap, backup->compress,
John Snow111049a2016-11-08 01:50:38 -05003663 backup->on_source_error, backup->on_target_error,
John Snowb40dacd2018-03-10 03:27:44 -05003664 job_flags, NULL, NULL, txn, &local_err);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003665 if (local_err != NULL) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003666 error_propagate(errp, local_err);
3667 }
3668out:
3669 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003670 return job;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003671}
3672
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003673void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003674{
John Snow111049a2016-11-08 01:50:38 -05003675 BlockJob *job;
3676 job = do_blockdev_backup(arg, NULL, errp);
3677 if (job) {
Kevin Wolfda01ff72018-04-13 17:31:02 +02003678 job_start(&job->job);
John Snow111049a2016-11-08 01:50:38 -05003679 }
John Snow78f51fd2015-11-05 18:13:17 -05003680}
3681
Fam Zheng4193cdd2015-12-24 12:45:03 +08003682/* Parameter check and block job starting for drive mirroring.
3683 * Caller should hold @device and @target's aio context (must be the same).
3684 **/
Alberto Garcia71aa9862016-07-05 17:28:57 +03003685static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003686 BlockDriverState *target,
3687 bool has_replaces, const char *replaces,
3688 enum MirrorSyncMode sync,
Max Reitz274fcce2016-06-10 20:57:47 +02003689 BlockMirrorBackingMode backing_mode,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003690 bool has_speed, int64_t speed,
3691 bool has_granularity, uint32_t granularity,
3692 bool has_buf_size, int64_t buf_size,
3693 bool has_on_source_error,
3694 BlockdevOnError on_source_error,
3695 bool has_on_target_error,
3696 BlockdevOnError on_target_error,
3697 bool has_unmap, bool unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003698 bool has_filter_node_name,
3699 const char *filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003700 bool has_copy_mode, MirrorCopyMode copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003701 bool has_auto_finalize, bool auto_finalize,
3702 bool has_auto_dismiss, bool auto_dismiss,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003703 Error **errp)
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003704{
John Snowa1999b32018-09-06 09:02:11 -04003705 int job_flags = JOB_DEFAULT;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003706
3707 if (!has_speed) {
3708 speed = 0;
3709 }
Paolo Bonzinib952b552012-10-18 16:49:28 +02003710 if (!has_on_source_error) {
3711 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3712 }
3713 if (!has_on_target_error) {
3714 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3715 }
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003716 if (!has_granularity) {
3717 granularity = 0;
3718 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003719 if (!has_buf_size) {
Wen Congyang48ac0a42015-05-15 15:51:36 +08003720 buf_size = 0;
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003721 }
Fam Zheng0fc9f8e2015-06-08 13:56:08 +08003722 if (!has_unmap) {
3723 unmap = true;
3724 }
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003725 if (!has_filter_node_name) {
3726 filter_node_name = NULL;
3727 }
Max Reitz481deba2018-06-13 20:18:22 +02003728 if (!has_copy_mode) {
3729 copy_mode = MIRROR_COPY_MODE_BACKGROUND;
3730 }
John Snowa6b58ad2018-09-06 09:02:22 -04003731 if (has_auto_finalize && !auto_finalize) {
3732 job_flags |= JOB_MANUAL_FINALIZE;
3733 }
3734 if (has_auto_dismiss && !auto_dismiss) {
3735 job_flags |= JOB_MANUAL_DISMISS;
3736 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003737
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003738 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003739 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3740 "a value in range [512B, 64MB]");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003741 return;
3742 }
3743 if (granularity & (granularity - 1)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003744 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3745 "power of 2");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003746 return;
3747 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003748
Fam Zheng4193cdd2015-12-24 12:45:03 +08003749 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3750 return;
3751 }
Fam Zhenge40e5022015-12-24 12:45:04 +08003752 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3753 return;
3754 }
Fam Zheng4193cdd2015-12-24 12:45:03 +08003755
3756 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3757 sync = MIRROR_SYNC_MODE_FULL;
3758 }
3759
Max Reitz74ce9e42019-02-13 23:53:01 +01003760 if (has_replaces) {
3761 BlockDriverState *to_replace_bs;
3762 AioContext *replace_aio_context;
3763 int64_t bs_size, replace_size;
3764
3765 bs_size = bdrv_getlength(bs);
3766 if (bs_size < 0) {
3767 error_setg_errno(errp, -bs_size, "Failed to query device's size");
3768 return;
3769 }
3770
3771 to_replace_bs = check_to_replace_node(bs, replaces, errp);
3772 if (!to_replace_bs) {
3773 return;
3774 }
3775
3776 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3777 aio_context_acquire(replace_aio_context);
3778 replace_size = bdrv_getlength(to_replace_bs);
3779 aio_context_release(replace_aio_context);
3780
3781 if (replace_size < 0) {
3782 error_setg_errno(errp, -replace_size,
3783 "Failed to query the replacement node's size");
3784 return;
3785 }
3786 if (bs_size != replace_size) {
3787 error_setg(errp, "cannot replace image with a mirror image of "
3788 "different size");
3789 return;
3790 }
3791 }
3792
Fam Zheng4193cdd2015-12-24 12:45:03 +08003793 /* pass the node name to replace to mirror start since it's loose coupling
3794 * and will allow to check whether the node still exist at mirror completion
3795 */
Alberto Garcia71aa9862016-07-05 17:28:57 +03003796 mirror_start(job_id, bs, target,
John Snowa1999b32018-09-06 09:02:11 -04003797 has_replaces ? replaces : NULL, job_flags,
Max Reitz274fcce2016-06-10 20:57:47 +02003798 speed, granularity, buf_size, sync, backing_mode,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003799 on_source_error, on_target_error, unmap, filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003800 copy_mode, errp);
Fam Zheng4193cdd2015-12-24 12:45:03 +08003801}
3802
Eric Blakefaecd402016-07-14 16:37:58 -06003803void qmp_drive_mirror(DriveMirror *arg, Error **errp)
Fam Zheng4193cdd2015-12-24 12:45:03 +08003804{
3805 BlockDriverState *bs;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003806 BlockDriverState *source, *target_bs;
3807 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003808 BlockMirrorBackingMode backing_mode;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003809 Error *local_err = NULL;
3810 QDict *options = NULL;
3811 int flags;
3812 int64_t size;
Eric Blakefaecd402016-07-14 16:37:58 -06003813 const char *format = arg->format;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003814
Kevin Wolf0524e932016-06-23 14:20:24 +02003815 bs = qmp_get_root_bs(arg->device, errp);
3816 if (!bs) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003817 return;
3818 }
3819
Paolo Bonzinicb2af912018-02-07 17:29:20 +01003820 /* Early check to avoid creating target */
3821 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3822 return;
3823 }
3824
Kevin Wolf0524e932016-06-23 14:20:24 +02003825 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003826 aio_context_acquire(aio_context);
3827
Eric Blakefaecd402016-07-14 16:37:58 -06003828 if (!arg->has_mode) {
3829 arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003830 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003831
Eric Blakefaecd402016-07-14 16:37:58 -06003832 if (!arg->has_format) {
3833 format = (arg->mode == NEW_IMAGE_MODE_EXISTING
3834 ? NULL : bs->drv->format_name);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003835 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003836
Kevin Wolf61de4c62016-03-18 17:46:45 +01003837 flags = bs->open_flags | BDRV_O_RDWR;
Kevin Wolf760e0062015-06-17 14:55:21 +02003838 source = backing_bs(bs);
Eric Blakefaecd402016-07-14 16:37:58 -06003839 if (!source && arg->sync == MIRROR_SYNC_MODE_TOP) {
3840 arg->sync = MIRROR_SYNC_MODE_FULL;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003841 }
Eric Blakefaecd402016-07-14 16:37:58 -06003842 if (arg->sync == MIRROR_SYNC_MODE_NONE) {
Max Reitz117e0c82013-11-25 20:28:55 +01003843 source = bs;
3844 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003845
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003846 size = bdrv_getlength(bs);
3847 if (size < 0) {
3848 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003849 goto out;
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003850 }
3851
Eric Blakefaecd402016-07-14 16:37:58 -06003852 if (arg->has_replaces) {
Eric Blakefaecd402016-07-14 16:37:58 -06003853 if (!arg->has_node_name) {
Benoît Canet09158f02014-06-27 18:25:25 +02003854 error_setg(errp, "a node-name must be provided when replacing a"
3855 " named node of the graph");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003856 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003857 }
Benoît Canet09158f02014-06-27 18:25:25 +02003858 }
3859
Eric Blakefaecd402016-07-14 16:37:58 -06003860 if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
Max Reitz274fcce2016-06-10 20:57:47 +02003861 backing_mode = MIRROR_SOURCE_BACKING_CHAIN;
3862 } else {
3863 backing_mode = MIRROR_OPEN_BACKING_CHAIN;
3864 }
3865
John Snow2a32c6e2017-07-17 20:34:21 -04003866 /* Don't open backing image in create() */
3867 flags |= BDRV_O_NO_BACKING;
3868
Eric Blakefaecd402016-07-14 16:37:58 -06003869 if ((arg->sync == MIRROR_SYNC_MODE_FULL || !source)
3870 && arg->mode != NEW_IMAGE_MODE_EXISTING)
Max Reitz14526862013-11-06 19:50:44 +01003871 {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003872 /* create new image w/o backing file */
Max Reitze6641712015-08-26 19:47:48 +02003873 assert(format);
Eric Blakefaecd402016-07-14 16:37:58 -06003874 bdrv_img_create(arg->target, format,
Fam Zheng92172832017-04-21 20:27:01 +08003875 NULL, NULL, NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003876 } else {
Eric Blakefaecd402016-07-14 16:37:58 -06003877 switch (arg->mode) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003878 case NEW_IMAGE_MODE_EXISTING:
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003879 break;
3880 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3881 /* create new image with backing file */
Max Reitzf30c66b2019-02-01 20:29:05 +01003882 bdrv_refresh_filename(source);
Eric Blakefaecd402016-07-14 16:37:58 -06003883 bdrv_img_create(arg->target, format,
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003884 source->filename,
3885 source->drv->format_name,
Fam Zheng92172832017-04-21 20:27:01 +08003886 NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003887 break;
3888 default:
3889 abort();
3890 }
3891 }
3892
Markus Armbruster84d18f02014-01-30 15:07:28 +01003893 if (local_err) {
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003894 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003895 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003896 }
3897
Max Reitze6641712015-08-26 19:47:48 +02003898 options = qdict_new();
Eric Blakefaecd402016-07-14 16:37:58 -06003899 if (arg->has_node_name) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003900 qdict_put_str(options, "node-name", arg->node_name);
Benoît Canet4c828dc2014-06-16 12:00:55 +02003901 }
Max Reitze6641712015-08-26 19:47:48 +02003902 if (format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003903 qdict_put_str(options, "driver", format);
Max Reitze6641712015-08-26 19:47:48 +02003904 }
Benoît Canet4c828dc2014-06-16 12:00:55 +02003905
Paolo Bonzinib812f672013-01-21 17:09:43 +01003906 /* Mirroring takes care of copy-on-write using the source's backing
3907 * file.
3908 */
John Snow2a32c6e2017-07-17 20:34:21 -04003909 target_bs = bdrv_open(arg->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003910 if (!target_bs) {
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003911 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003912 }
3913
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003914 bdrv_set_aio_context(target_bs, aio_context);
3915
Eric Blakefaecd402016-07-14 16:37:58 -06003916 blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs,
3917 arg->has_replaces, arg->replaces, arg->sync,
3918 backing_mode, arg->has_speed, arg->speed,
3919 arg->has_granularity, arg->granularity,
3920 arg->has_buf_size, arg->buf_size,
3921 arg->has_on_source_error, arg->on_source_error,
3922 arg->has_on_target_error, arg->on_target_error,
3923 arg->has_unmap, arg->unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003924 false, NULL,
Max Reitz481deba2018-06-13 20:18:22 +02003925 arg->has_copy_mode, arg->copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003926 arg->has_auto_finalize, arg->auto_finalize,
3927 arg->has_auto_dismiss, arg->auto_dismiss,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003928 &local_err);
Kevin Wolfe253f4b2016-04-12 16:17:41 +02003929 bdrv_unref(target_bs);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003930 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003931out:
3932 aio_context_release(aio_context);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003933}
3934
Alberto Garcia71aa9862016-07-05 17:28:57 +03003935void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
3936 const char *device, const char *target,
Fam Zhengdf925622015-12-24 12:45:05 +08003937 bool has_replaces, const char *replaces,
3938 MirrorSyncMode sync,
3939 bool has_speed, int64_t speed,
3940 bool has_granularity, uint32_t granularity,
3941 bool has_buf_size, int64_t buf_size,
3942 bool has_on_source_error,
3943 BlockdevOnError on_source_error,
3944 bool has_on_target_error,
3945 BlockdevOnError on_target_error,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003946 bool has_filter_node_name,
3947 const char *filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003948 bool has_copy_mode, MirrorCopyMode copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003949 bool has_auto_finalize, bool auto_finalize,
3950 bool has_auto_dismiss, bool auto_dismiss,
Fam Zhengdf925622015-12-24 12:45:05 +08003951 Error **errp)
3952{
3953 BlockDriverState *bs;
Fam Zhengdf925622015-12-24 12:45:05 +08003954 BlockDriverState *target_bs;
3955 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003956 BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN;
Fam Zhengdf925622015-12-24 12:45:05 +08003957 Error *local_err = NULL;
3958
Kevin Wolf07eec652016-06-23 14:20:24 +02003959 bs = qmp_get_root_bs(device, errp);
Fam Zhengdf925622015-12-24 12:45:05 +08003960 if (!bs) {
Fam Zhengdf925622015-12-24 12:45:05 +08003961 return;
3962 }
3963
3964 target_bs = bdrv_lookup_bs(target, target, errp);
3965 if (!target_bs) {
3966 return;
3967 }
3968
3969 aio_context = bdrv_get_aio_context(bs);
3970 aio_context_acquire(aio_context);
3971
Fam Zhengdf925622015-12-24 12:45:05 +08003972 bdrv_set_aio_context(target_bs, aio_context);
3973
Alberto Garcia71aa9862016-07-05 17:28:57 +03003974 blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs,
Max Reitz274fcce2016-06-10 20:57:47 +02003975 has_replaces, replaces, sync, backing_mode,
Fam Zhengdf925622015-12-24 12:45:05 +08003976 has_speed, speed,
3977 has_granularity, granularity,
3978 has_buf_size, buf_size,
3979 has_on_source_error, on_source_error,
3980 has_on_target_error, on_target_error,
3981 true, true,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003982 has_filter_node_name, filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003983 has_copy_mode, copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003984 has_auto_finalize, auto_finalize,
3985 has_auto_dismiss, auto_dismiss,
Fam Zhengdf925622015-12-24 12:45:05 +08003986 &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003987 error_propagate(errp, local_err);
Fam Zhengdf925622015-12-24 12:45:05 +08003988
3989 aio_context_release(aio_context);
3990}
3991
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003992/* Get a block job using its ID and acquire its AioContext */
3993static BlockJob *find_block_job(const char *id, AioContext **aio_context,
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003994 Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003995{
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003996 BlockJob *job;
3997
3998 assert(id != NULL);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003999
Max Reitz5433c242015-10-19 17:53:29 +02004000 *aio_context = NULL;
4001
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004002 job = block_job_get(id);
4003
4004 if (!job) {
4005 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
4006 "Block job '%s' not found", id);
4007 return NULL;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004008 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004009
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004010 *aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004011 aio_context_acquire(*aio_context);
4012
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03004013 return job;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004014}
4015
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01004016void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004017{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004018 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004019 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004020
4021 if (!job) {
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004022 return;
4023 }
4024
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01004025 block_job_set_speed(job, speed, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004026 aio_context_release(aio_context);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00004027}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004028
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004029void qmp_block_job_cancel(const char *device,
4030 bool has_force, bool force, Error **errp)
4031{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004032 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004033 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004034
4035 if (!job) {
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004036 return;
4037 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004038
4039 if (!has_force) {
4040 force = false;
4041 }
4042
Kevin Wolfb15de822018-04-18 17:10:26 +02004043 if (job_user_paused(&job->job) && !force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04004044 error_setg(errp, "The block job for device '%s' is currently paused",
4045 device);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004046 goto out;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004047 }
4048
4049 trace_qmp_block_job_cancel(job);
Kevin Wolf3d70ff52018-04-24 16:13:52 +02004050 job_user_cancel(&job->job, force, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004051out:
4052 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004053}
4054
4055void qmp_block_job_pause(const char *device, Error **errp)
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004056{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004057 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004058 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004059
John Snow0ec4dfb2018-03-10 03:27:32 -05004060 if (!job) {
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004061 return;
4062 }
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004063
4064 trace_qmp_block_job_pause(job);
Kevin Wolfb15de822018-04-18 17:10:26 +02004065 job_user_pause(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004066 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004067}
4068
4069void qmp_block_job_resume(const char *device, Error **errp)
4070{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004071 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004072 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004073
John Snow0ec4dfb2018-03-10 03:27:32 -05004074 if (!job) {
Paolo Bonzini8acc72a2012-09-28 17:22:50 +02004075 return;
4076 }
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004077
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004078 trace_qmp_block_job_resume(job);
Kevin Wolfb15de822018-04-18 17:10:26 +02004079 job_user_resume(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004080 aio_context_release(aio_context);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004081}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004082
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004083void qmp_block_job_complete(const char *device, Error **errp)
4084{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004085 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004086 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004087
4088 if (!job) {
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004089 return;
4090 }
4091
4092 trace_qmp_block_job_complete(job);
Kevin Wolf3453d972018-04-23 12:24:16 +02004093 job_complete(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004094 aio_context_release(aio_context);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004095}
4096
John Snow11b61fb2018-03-10 03:27:43 -05004097void qmp_block_job_finalize(const char *id, Error **errp)
4098{
4099 AioContext *aio_context;
4100 BlockJob *job = find_block_job(id, &aio_context, errp);
4101
4102 if (!job) {
4103 return;
4104 }
4105
4106 trace_qmp_block_job_finalize(job);
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02004107 job_finalize(&job->job, errp);
John Snow11b61fb2018-03-10 03:27:43 -05004108 aio_context_release(aio_context);
4109}
4110
John Snow75f71052018-03-10 03:27:36 -05004111void qmp_block_job_dismiss(const char *id, Error **errp)
4112{
4113 AioContext *aio_context;
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004114 BlockJob *bjob = find_block_job(id, &aio_context, errp);
4115 Job *job;
John Snow75f71052018-03-10 03:27:36 -05004116
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004117 if (!bjob) {
John Snow75f71052018-03-10 03:27:36 -05004118 return;
4119 }
4120
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004121 trace_qmp_block_job_dismiss(bjob);
4122 job = &bjob->job;
4123 job_dismiss(&job, errp);
John Snow75f71052018-03-10 03:27:36 -05004124 aio_context_release(aio_context);
4125}
4126
Jeff Codyfa40e652014-07-01 09:52:16 +02004127void qmp_change_backing_file(const char *device,
4128 const char *image_node_name,
4129 const char *backing_file,
4130 Error **errp)
4131{
4132 BlockDriverState *bs = NULL;
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004133 AioContext *aio_context;
Jeff Codyfa40e652014-07-01 09:52:16 +02004134 BlockDriverState *image_bs = NULL;
4135 Error *local_err = NULL;
4136 bool ro;
Jeff Codyfa40e652014-07-01 09:52:16 +02004137 int ret;
4138
Kevin Wolf7b5dca32016-06-23 14:20:24 +02004139 bs = qmp_get_root_bs(device, errp);
4140 if (!bs) {
Jeff Codyfa40e652014-07-01 09:52:16 +02004141 return;
4142 }
4143
Kevin Wolf7b5dca32016-06-23 14:20:24 +02004144 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004145 aio_context_acquire(aio_context);
4146
Jeff Codyfa40e652014-07-01 09:52:16 +02004147 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
4148 if (local_err) {
4149 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004150 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004151 }
4152
4153 if (!image_bs) {
4154 error_setg(errp, "image file not found");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004155 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004156 }
4157
4158 if (bdrv_find_base(image_bs) == image_bs) {
4159 error_setg(errp, "not allowing backing file change on an image "
4160 "without a backing file");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004161 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004162 }
4163
4164 /* even though we are not necessarily operating on bs, we need it to
4165 * determine if block ops are currently prohibited on the chain */
4166 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004167 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004168 }
4169
4170 /* final sanity check */
4171 if (!bdrv_chain_contains(bs, image_bs)) {
4172 error_setg(errp, "'%s' and image file are not in the same chain",
4173 device);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004174 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004175 }
4176
4177 /* if not r/w, reopen to make r/w */
Jeff Codyfa40e652014-07-01 09:52:16 +02004178 ro = bdrv_is_read_only(image_bs);
4179
4180 if (ro) {
Alberto Garcia051a60f2018-11-12 16:00:38 +02004181 if (bdrv_reopen_set_read_only(image_bs, false, errp) != 0) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004182 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004183 }
4184 }
4185
4186 ret = bdrv_change_backing_file(image_bs, backing_file,
4187 image_bs->drv ? image_bs->drv->format_name : "");
4188
4189 if (ret < 0) {
4190 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
4191 backing_file);
4192 /* don't exit here, so we can try to restore open flags if
4193 * appropriate */
4194 }
4195
4196 if (ro) {
Alberto Garcia051a60f2018-11-12 16:00:38 +02004197 bdrv_reopen_set_read_only(image_bs, true, &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03004198 error_propagate(errp, local_err);
Jeff Codyfa40e652014-07-01 09:52:16 +02004199 }
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004200
4201out:
4202 aio_context_release(aio_context);
Jeff Codyfa40e652014-07-01 09:52:16 +02004203}
4204
Kevin Wolfabb21ac2016-02-23 17:33:24 +01004205void hmp_drive_add_node(Monitor *mon, const char *optstr)
4206{
4207 QemuOpts *opts;
4208 QDict *qdict;
4209 Error *local_err = NULL;
4210
4211 opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
4212 if (!opts) {
4213 return;
4214 }
4215
4216 qdict = qemu_opts_to_qdict(opts, NULL);
4217
4218 if (!qdict_get_try_str(qdict, "node-name")) {
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +02004219 qobject_unref(qdict);
Kevin Wolfabb21ac2016-02-23 17:33:24 +01004220 error_report("'node-name' needs to be specified");
4221 goto out;
4222 }
4223
4224 BlockDriverState *bs = bds_tree_init(qdict, &local_err);
4225 if (!bs) {
4226 error_report_err(local_err);
4227 goto out;
4228 }
4229
4230 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4231
4232out:
4233 qemu_opts_del(opts);
4234}
4235
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004236void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
4237{
Max Reitzbe4b67b2015-10-19 17:53:09 +02004238 BlockDriverState *bs;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004239 QObject *obj;
Daniel P. Berrange7d5e1992016-09-30 15:45:28 +01004240 Visitor *v = qobject_output_visitor_new(&obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004241 QDict *qdict;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004242 Error *local_err = NULL;
4243
Eric Blake3b098d52016-06-09 10:48:43 -06004244 visit_type_BlockdevOptions(v, NULL, &options, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01004245 if (local_err) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004246 error_propagate(errp, local_err);
4247 goto fail;
4248 }
4249
Eric Blake3b098d52016-06-09 10:48:43 -06004250 visit_complete(v, &obj);
Max Reitz7dc847e2018-02-24 16:40:29 +01004251 qdict = qobject_to(QDict, obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004252
4253 qdict_flatten(qdict);
4254
Kevin Wolf9ec88732016-09-21 14:56:11 +02004255 if (!qdict_get_try_str(qdict, "node-name")) {
4256 error_setg(errp, "'node-name' must be specified for the root node");
4257 goto fail;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004258 }
4259
Kevin Wolf9ec88732016-09-21 14:56:11 +02004260 bs = bds_tree_init(qdict, errp);
4261 if (!bs) {
4262 goto fail;
4263 }
4264
4265 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4266
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004267fail:
Eric Blake3b098d52016-06-09 10:48:43 -06004268 visit_free(v);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004269}
4270
Alberto Garcia1479c732019-03-12 18:48:51 +02004271void qmp_x_blockdev_reopen(BlockdevOptions *options, Error **errp)
4272{
4273 BlockDriverState *bs;
4274 AioContext *ctx;
4275 QObject *obj;
4276 Visitor *v = qobject_output_visitor_new(&obj);
4277 Error *local_err = NULL;
4278 BlockReopenQueue *queue;
4279 QDict *qdict;
4280
4281 /* Check for the selected node name */
4282 if (!options->has_node_name) {
4283 error_setg(errp, "Node name not specified");
4284 goto fail;
4285 }
4286
4287 bs = bdrv_find_node(options->node_name);
4288 if (!bs) {
4289 error_setg(errp, "Cannot find node named '%s'", options->node_name);
4290 goto fail;
4291 }
4292
4293 /* Put all options in a QDict and flatten it */
4294 visit_type_BlockdevOptions(v, NULL, &options, &local_err);
4295 if (local_err) {
4296 error_propagate(errp, local_err);
4297 goto fail;
4298 }
4299
4300 visit_complete(v, &obj);
4301 qdict = qobject_to(QDict, obj);
4302
4303 qdict_flatten(qdict);
4304
4305 /* Perform the reopen operation */
4306 ctx = bdrv_get_aio_context(bs);
4307 aio_context_acquire(ctx);
4308 bdrv_subtree_drained_begin(bs);
4309 queue = bdrv_reopen_queue(NULL, bs, qdict, false);
4310 bdrv_reopen_multiple(queue, errp);
4311 bdrv_subtree_drained_end(bs);
4312 aio_context_release(ctx);
4313
4314fail:
4315 visit_free(v);
4316}
4317
Markus Armbruster79b7a772017-03-21 17:53:28 +01004318void qmp_blockdev_del(const char *node_name, Error **errp)
Alberto Garcia81b936a2015-11-02 16:51:55 +02004319{
4320 AioContext *aio_context;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004321 BlockDriverState *bs;
4322
Kevin Wolf9ec88732016-09-21 14:56:11 +02004323 bs = bdrv_find_node(node_name);
4324 if (!bs) {
4325 error_setg(errp, "Cannot find node %s", node_name);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004326 return;
4327 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004328 if (bdrv_has_blk(bs)) {
4329 error_setg(errp, "Node %s is in use", node_name);
4330 return;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004331 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004332 aio_context = bdrv_get_aio_context(bs);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004333 aio_context_acquire(aio_context);
4334
Kevin Wolf9ec88732016-09-21 14:56:11 +02004335 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
4336 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004337 }
4338
Paolo Bonzini70537ed2018-12-06 23:00:09 +01004339 if (!QTAILQ_IN_USE(bs, monitor_list)) {
Kevin Wolf9ec88732016-09-21 14:56:11 +02004340 error_setg(errp, "Node %s is not owned by the monitor",
4341 bs->node_name);
4342 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004343 }
4344
Kevin Wolf9ec88732016-09-21 14:56:11 +02004345 if (bs->refcnt > 1) {
4346 error_setg(errp, "Block device %s is in use",
4347 bdrv_get_device_or_node_name(bs));
4348 goto out;
4349 }
4350
4351 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
4352 bdrv_unref(bs);
4353
Alberto Garcia81b936a2015-11-02 16:51:55 +02004354out:
4355 aio_context_release(aio_context);
4356}
4357
Wen Congyang7f821592016-05-10 15:36:39 +08004358static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs,
4359 const char *child_name)
4360{
4361 BdrvChild *child;
4362
4363 QLIST_FOREACH(child, &parent_bs->children, next) {
4364 if (strcmp(child->name, child_name) == 0) {
4365 return child;
4366 }
4367 }
4368
4369 return NULL;
4370}
4371
4372void qmp_x_blockdev_change(const char *parent, bool has_child,
4373 const char *child, bool has_node,
4374 const char *node, Error **errp)
4375{
4376 BlockDriverState *parent_bs, *new_bs = NULL;
4377 BdrvChild *p_child;
4378
4379 parent_bs = bdrv_lookup_bs(parent, parent, errp);
4380 if (!parent_bs) {
4381 return;
4382 }
4383
4384 if (has_child == has_node) {
4385 if (has_child) {
4386 error_setg(errp, "The parameters child and node are in conflict");
4387 } else {
4388 error_setg(errp, "Either child or node must be specified");
4389 }
4390 return;
4391 }
4392
4393 if (has_child) {
4394 p_child = bdrv_find_child(parent_bs, child);
4395 if (!p_child) {
4396 error_setg(errp, "Node '%s' does not have child '%s'",
4397 parent, child);
4398 return;
4399 }
4400 bdrv_del_child(parent_bs, p_child, errp);
4401 }
4402
4403 if (has_node) {
4404 new_bs = bdrv_find_node(node);
4405 if (!new_bs) {
4406 error_setg(errp, "Node '%s' not found", node);
4407 return;
4408 }
4409 bdrv_add_child(parent_bs, new_bs, errp);
4410 }
4411}
4412
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004413BlockJobInfoList *qmp_query_block_jobs(Error **errp)
4414{
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004415 BlockJobInfoList *head = NULL, **p_next = &head;
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004416 BlockJob *job;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004417
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004418 for (job = block_job_next(NULL); job; job = block_job_next(job)) {
John Snow559b9352016-10-27 12:06:55 -04004419 BlockJobInfoList *elem;
4420 AioContext *aio_context;
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004421
John Snow559b9352016-10-27 12:06:55 -04004422 if (block_job_is_internal(job)) {
4423 continue;
4424 }
4425 elem = g_new0(BlockJobInfoList, 1);
4426 aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004427 aio_context_acquire(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004428 elem->value = block_job_query(job, errp);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004429 aio_context_release(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004430 if (!elem->value) {
4431 g_free(elem);
4432 qapi_free_BlockJobInfoList(head);
4433 return NULL;
4434 }
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004435 *p_next = elem;
4436 p_next = &elem->next;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004437 }
4438
4439 return head;
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004440}
Paolo Bonzini4d454572012-11-26 16:03:42 +01004441
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004442void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread,
Stefan Hajnoczi882e9b82017-12-07 20:13:17 +00004443 bool has_force, bool force, Error **errp)
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004444{
4445 AioContext *old_context;
4446 AioContext *new_context;
4447 BlockDriverState *bs;
4448
4449 bs = bdrv_find_node(node_name);
4450 if (!bs) {
4451 error_setg(errp, "Cannot find node %s", node_name);
4452 return;
4453 }
4454
Stefan Hajnoczi882e9b82017-12-07 20:13:17 +00004455 /* Protects against accidents. */
4456 if (!(has_force && force) && bdrv_has_blk(bs)) {
4457 error_setg(errp, "Node %s is associated with a BlockBackend and could "
4458 "be in use (use force=true to override this check)",
4459 node_name);
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004460 return;
4461 }
4462
4463 if (iothread->type == QTYPE_QSTRING) {
4464 IOThread *obj = iothread_by_id(iothread->u.s);
4465 if (!obj) {
4466 error_setg(errp, "Cannot find iothread %s", iothread->u.s);
4467 return;
4468 }
4469
4470 new_context = iothread_get_aio_context(obj);
4471 } else {
4472 new_context = qemu_get_aio_context();
4473 }
4474
4475 old_context = bdrv_get_aio_context(bs);
4476 aio_context_acquire(old_context);
4477
4478 bdrv_set_aio_context(bs, new_context);
4479
4480 aio_context_release(old_context);
4481}
4482
Vladimir Sementsov-Ogievskiycb8aac32019-03-05 15:53:17 +03004483void qmp_block_latency_histogram_set(
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004484 const char *id,
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004485 bool has_boundaries, uint64List *boundaries,
4486 bool has_boundaries_read, uint64List *boundaries_read,
4487 bool has_boundaries_write, uint64List *boundaries_write,
4488 bool has_boundaries_flush, uint64List *boundaries_flush,
4489 Error **errp)
4490{
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004491 BlockBackend *blk = qmp_get_blk(NULL, id, errp);
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004492 BlockAcctStats *stats;
zhenwei pi63d53412018-11-05 11:04:56 +08004493 int ret;
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004494
4495 if (!blk) {
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004496 return;
4497 }
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004498
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004499 stats = blk_get_stats(blk);
4500
4501 if (!has_boundaries && !has_boundaries_read && !has_boundaries_write &&
4502 !has_boundaries_flush)
4503 {
4504 block_latency_histograms_clear(stats);
4505 return;
4506 }
4507
4508 if (has_boundaries || has_boundaries_read) {
zhenwei pi63d53412018-11-05 11:04:56 +08004509 ret = block_latency_histogram_set(
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004510 stats, BLOCK_ACCT_READ,
4511 has_boundaries_read ? boundaries_read : boundaries);
zhenwei pi63d53412018-11-05 11:04:56 +08004512 if (ret) {
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004513 error_setg(errp, "Device '%s' set read boundaries fail", id);
zhenwei pi63d53412018-11-05 11:04:56 +08004514 return;
4515 }
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004516 }
4517
4518 if (has_boundaries || has_boundaries_write) {
zhenwei pi63d53412018-11-05 11:04:56 +08004519 ret = block_latency_histogram_set(
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004520 stats, BLOCK_ACCT_WRITE,
4521 has_boundaries_write ? boundaries_write : boundaries);
zhenwei pi63d53412018-11-05 11:04:56 +08004522 if (ret) {
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004523 error_setg(errp, "Device '%s' set write boundaries fail", id);
zhenwei pi63d53412018-11-05 11:04:56 +08004524 return;
4525 }
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004526 }
4527
4528 if (has_boundaries || has_boundaries_flush) {
zhenwei pi63d53412018-11-05 11:04:56 +08004529 ret = block_latency_histogram_set(
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004530 stats, BLOCK_ACCT_FLUSH,
4531 has_boundaries_flush ? boundaries_flush : boundaries);
zhenwei pi63d53412018-11-05 11:04:56 +08004532 if (ret) {
Vladimir Sementsov-Ogievskiyaf0a2262019-03-05 15:53:16 +03004533 error_setg(errp, "Device '%s' set flush boundaries fail", id);
zhenwei pi63d53412018-11-05 11:04:56 +08004534 return;
4535 }
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004536 }
4537}
4538
Kevin Wolf00063832013-03-15 10:35:07 +01004539QemuOptsList qemu_common_drive_opts = {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004540 .name = "drive",
Kevin Wolf00063832013-03-15 10:35:07 +01004541 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
Paolo Bonzini4d454572012-11-26 16:03:42 +01004542 .desc = {
4543 {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004544 .name = "snapshot",
4545 .type = QEMU_OPT_BOOL,
4546 .help = "enable/disable snapshot mode",
4547 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004548 .name = "aio",
4549 .type = QEMU_OPT_STRING,
4550 .help = "host AIO implementation (threads, native)",
4551 },{
Kevin Wolfe4b24b42016-03-15 15:39:42 +01004552 .name = BDRV_OPT_CACHE_WB,
4553 .type = QEMU_OPT_BOOL,
4554 .help = "Enable writeback mode",
4555 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004556 .name = "format",
4557 .type = QEMU_OPT_STRING,
4558 .help = "disk format (raw, qcow2, ...)",
4559 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004560 .name = "rerror",
4561 .type = QEMU_OPT_STRING,
4562 .help = "read error action",
4563 },{
4564 .name = "werror",
4565 .type = QEMU_OPT_STRING,
4566 .help = "write error action",
4567 },{
Alberto Garcia4e200cf2016-09-15 17:53:05 +03004568 .name = BDRV_OPT_READ_ONLY,
Paolo Bonzini4d454572012-11-26 16:03:42 +01004569 .type = QEMU_OPT_BOOL,
4570 .help = "open drive file as read-only",
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +01004571 },
4572
4573 THROTTLE_OPTS,
4574
4575 {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02004576 .name = "throttling.group",
4577 .type = QEMU_OPT_STRING,
4578 .help = "name of the block throttling group",
4579 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004580 .name = "copy-on-read",
4581 .type = QEMU_OPT_BOOL,
4582 .help = "copy read data from backing file into image file",
Peter Lieven465bee12014-05-18 00:58:19 +02004583 },{
4584 .name = "detect-zeroes",
4585 .type = QEMU_OPT_STRING,
4586 .help = "try to optimize zero writes (off, on, unmap)",
Alberto Garcia362e9292015-10-28 17:33:04 +02004587 },{
4588 .name = "stats-account-invalid",
4589 .type = QEMU_OPT_BOOL,
4590 .help = "whether to account for invalid I/O operations "
4591 "in the statistics",
4592 },{
4593 .name = "stats-account-failed",
4594 .type = QEMU_OPT_BOOL,
4595 .help = "whether to account for failed I/O operations "
4596 "in the statistics",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004597 },
4598 { /* end of list */ }
4599 },
4600};
Kevin Wolf00063832013-03-15 10:35:07 +01004601
4602QemuOptsList qemu_drive_opts = {
4603 .name = "drive",
4604 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4605 .desc = {
Kevin Wolf492fdc62013-06-19 13:44:17 +02004606 /*
4607 * no elements => accept any params
4608 * validation will happen later
4609 */
Kevin Wolf00063832013-03-15 10:35:07 +01004610 { /* end of list */ }
4611 },
4612};