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Markus Armbruster666daa62010-06-02 18:48:27 +02001/*
2 * QEMU host block devices
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * later. See the COPYING file in the top-level directory.
Markus Armbruster3618a092013-03-14 13:59:53 +01008 *
9 * This file incorporates work covered by the following copyright and
10 * permission notice:
11 *
12 * Copyright (c) 2003-2008 Fabrice Bellard
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 * THE SOFTWARE.
Markus Armbruster666daa62010-06-02 18:48:27 +020031 */
32
Peter Maydelld38ea872016-01-29 17:50:05 +000033#include "qemu/osdep.h"
Markus Armbruster26f54e92014-10-07 13:59:04 +020034#include "sysemu/block-backend.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010035#include "sysemu/blockdev.h"
Paolo Bonzini0d09e412013-02-05 17:06:20 +010036#include "hw/block/block.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010037#include "block/blockjob.h"
Max Reitz609f45e2018-06-14 21:14:28 +020038#include "block/qdict.h"
Alberto Garcia76f4afb2015-06-08 18:17:44 +020039#include "block/throttle-groups.h"
Paolo Bonzini83c90892012-12-17 18:19:49 +010040#include "monitor/monitor.h"
Markus Armbrusterd49b6832015-03-17 18:29:20 +010041#include "qemu/error-report.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010042#include "qemu/option.h"
43#include "qemu/config-file.h"
Markus Armbruster9af23982018-02-11 10:36:01 +010044#include "qapi/qapi-commands-block.h"
45#include "qapi/qapi-commands-transaction.h"
46#include "qapi/qapi-visit-block-core.h"
Markus Armbruster452fcdb2018-02-01 12:18:39 +010047#include "qapi/qmp/qdict.h"
Markus Armbruster15280c32018-02-01 12:18:36 +010048#include "qapi/qmp/qnum.h"
Markus Armbruster6b673952018-02-01 12:18:35 +010049#include "qapi/qmp/qstring.h"
Markus Armbrustere688df62018-02-01 12:18:31 +010050#include "qapi/error.h"
Markus Armbrustercc7a8ea2015-03-17 17:22:46 +010051#include "qapi/qmp/qerror.h"
Markus Armbruster47e6b292018-02-01 12:18:38 +010052#include "qapi/qmp/qlist.h"
Daniel P. Berrangeb3db2112016-09-30 15:45:27 +010053#include "qapi/qobject-output-visitor.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010054#include "sysemu/sysemu.h"
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +000055#include "sysemu/iothread.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010056#include "block/block_int.h"
Daniel P. Berrange0ab8ed12017-01-25 16:14:15 +000057#include "block/trace.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010058#include "sysemu/arch_init.h"
Thomas Huthc616f162017-05-12 12:33:49 +020059#include "sysemu/qtest.h"
Veronia Bahaaf348b6d2016-03-20 19:16:19 +020060#include "qemu/cutils.h"
61#include "qemu/help_option.h"
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +010062#include "qemu/throttle-options.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020063
Max Reitz9c4218e2016-01-29 16:36:12 +010064static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
65 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
66
Kevin Wolfb33945c2016-09-20 13:38:43 +020067static int do_open_tray(const char *blk_name, const char *qdev_id,
68 bool force, Error **errp);
Max Reitz82fcf662017-11-10 23:43:01 +010069static void blockdev_remove_medium(bool has_device, const char *device,
70 bool has_id, const char *id, Error **errp);
71static void blockdev_insert_medium(bool has_device, const char *device,
72 bool has_id, const char *id,
73 const char *node_name, Error **errp);
Colin Lordbf18bee2016-06-06 14:15:22 -040074
Markus Armbruster19609662011-01-28 11:21:39 +010075static const char *const if_name[IF_COUNT] = {
76 [IF_NONE] = "none",
77 [IF_IDE] = "ide",
78 [IF_SCSI] = "scsi",
79 [IF_FLOPPY] = "floppy",
80 [IF_PFLASH] = "pflash",
81 [IF_MTD] = "mtd",
82 [IF_SD] = "sd",
83 [IF_VIRTIO] = "virtio",
84 [IF_XEN] = "xen",
85};
86
John Snow21dff8c2014-10-01 14:19:25 -040087static int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010088 /*
89 * Do not change these numbers! They govern how drive option
90 * index maps to unit and bus. That mapping is ABI.
91 *
Wei Jiangang547cb152016-04-26 18:12:43 +080092 * All controllers used to implement if=T drives need to support
Markus Armbruster27d6bf42011-01-28 11:21:40 +010093 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
94 * Otherwise, some index values map to "impossible" bus, unit
95 * values.
96 *
97 * For instance, if you change [IF_SCSI] to 255, -drive
98 * if=scsi,index=12 no longer means bus=1,unit=5, but
99 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
100 * the drive can't be set up. Regression.
101 */
102 [IF_IDE] = 2,
103 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +0100104};
105
John Snow21dff8c2014-10-01 14:19:25 -0400106/**
107 * Boards may call this to offer board-by-board overrides
108 * of the default, global values.
109 */
110void override_max_devs(BlockInterfaceType type, int max_devs)
111{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200112 BlockBackend *blk;
John Snow21dff8c2014-10-01 14:19:25 -0400113 DriveInfo *dinfo;
114
115 if (max_devs <= 0) {
116 return;
117 }
118
Markus Armbruster18e46a02014-10-07 13:59:06 +0200119 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
120 dinfo = blk_legacy_dinfo(blk);
John Snow21dff8c2014-10-01 14:19:25 -0400121 if (dinfo->type == type) {
122 fprintf(stderr, "Cannot override units-per-bus property of"
123 " the %s interface, because a drive of that type has"
124 " already been added.\n", if_name[type]);
125 g_assert_not_reached();
126 }
127 }
128
129 if_max_devs[type] = max_devs;
130}
131
Markus Armbruster14bafc52010-06-25 08:09:10 +0200132/*
133 * We automatically delete the drive when a device using it gets
134 * unplugged. Questionable feature, but we can't just drop it.
135 * Device models call blockdev_mark_auto_del() to schedule the
136 * automatic deletion, and generic qdev code calls blockdev_auto_del()
137 * when deletion is actually safe.
138 */
Markus Armbruster4be74632014-10-07 13:59:18 +0200139void blockdev_mark_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200140{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200141 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster4be74632014-10-07 13:59:18 +0200142 BlockDriverState *bs = blk_bs(blk);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100143 AioContext *aio_context;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200144
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200145 if (!dinfo) {
Kevin Wolf2d246f02013-09-18 15:14:47 +0200146 return;
147 }
148
Max Reitz5433c242015-10-19 17:53:29 +0200149 if (bs) {
150 aio_context = bdrv_get_aio_context(bs);
151 aio_context_acquire(aio_context);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100152
Max Reitz5433c242015-10-19 17:53:29 +0200153 if (bs->job) {
Kevin Wolf3d70ff52018-04-24 16:13:52 +0200154 job_cancel(&bs->job->job, false);
Max Reitz5433c242015-10-19 17:53:29 +0200155 }
156
157 aio_context_release(aio_context);
Paolo Bonzini12bde0e2012-03-30 13:17:10 +0200158 }
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100159
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200160 dinfo->auto_del = 1;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200161}
162
Markus Armbruster4be74632014-10-07 13:59:18 +0200163void blockdev_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200164{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200165 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200166
Ryan Harper0fc0f1f2010-12-08 10:05:00 -0600167 if (dinfo && dinfo->auto_del) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100168 monitor_remove_blk(blk);
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +0200169 blk_unref(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200170 }
171}
172
John Snowd8f94e12014-10-01 14:19:27 -0400173/**
174 * Returns the current mapping of how many units per bus
175 * a particular interface can support.
176 *
177 * A positive integer indicates n units per bus.
178 * 0 implies the mapping has not been established.
179 * -1 indicates an invalid BlockInterfaceType was given.
180 */
181int drive_get_max_devs(BlockInterfaceType type)
182{
183 if (type >= IF_IDE && type < IF_COUNT) {
184 return if_max_devs[type];
185 }
186
187 return -1;
188}
189
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100190static int drive_index_to_bus_id(BlockInterfaceType type, int index)
191{
192 int max_devs = if_max_devs[type];
193 return max_devs ? index / max_devs : 0;
194}
195
196static int drive_index_to_unit_id(BlockInterfaceType type, int index)
197{
198 int max_devs = if_max_devs[type];
199 return max_devs ? index % max_devs : index;
200}
201
Markus Armbruster2292dda2011-01-28 11:21:41 +0100202QemuOpts *drive_def(const char *optstr)
203{
Markus Armbruster70b94332015-02-13 12:50:26 +0100204 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100205}
206
207QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100208 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200209{
Markus Armbruster666daa62010-06-02 18:48:27 +0200210 QemuOpts *opts;
211
Markus Armbruster2292dda2011-01-28 11:21:41 +0100212 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200213 if (!opts) {
214 return NULL;
215 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100216 if (type != IF_DEFAULT) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100217 qemu_opt_set(opts, "if", if_name[type], &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100218 }
219 if (index >= 0) {
Markus Armbrustera8b18f82015-02-13 15:50:43 +0100220 qemu_opt_set_number(opts, "index", index, &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100221 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200222 if (file)
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100223 qemu_opt_set(opts, "file", file, &error_abort);
Markus Armbruster666daa62010-06-02 18:48:27 +0200224 return opts;
225}
226
227DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
228{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200229 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200230 DriveInfo *dinfo;
231
Markus Armbruster18e46a02014-10-07 13:59:06 +0200232 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
233 dinfo = blk_legacy_dinfo(blk);
234 if (dinfo && dinfo->type == type
235 && dinfo->bus == bus && dinfo->unit == unit) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200236 return dinfo;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200237 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200238 }
239
240 return NULL;
241}
242
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100243void drive_check_orphaned(void)
John Snowa66c9dc2014-10-01 14:19:24 -0400244{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200245 BlockBackend *blk;
John Snowa66c9dc2014-10-01 14:19:24 -0400246 DriveInfo *dinfo;
Markus Armbruster664cc622017-02-15 11:05:45 +0100247 Location loc;
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100248 bool orphans = false;
John Snowa66c9dc2014-10-01 14:19:24 -0400249
Markus Armbruster18e46a02014-10-07 13:59:06 +0200250 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
251 dinfo = blk_legacy_dinfo(blk);
Markus Armbrustera7f53e22014-10-07 13:59:25 +0200252 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
John Snowa66c9dc2014-10-01 14:19:24 -0400253 dinfo->type != IF_NONE) {
Markus Armbruster664cc622017-02-15 11:05:45 +0100254 loc_push_none(&loc);
255 qemu_opts_loc_restore(dinfo->opts);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100256 error_report("machine type does not support"
Markus Armbruster664cc622017-02-15 11:05:45 +0100257 " if=%s,bus=%d,unit=%d",
258 if_name[dinfo->type], dinfo->bus, dinfo->unit);
259 loc_pop(&loc);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100260 orphans = true;
John Snowa66c9dc2014-10-01 14:19:24 -0400261 }
262 }
263
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100264 if (orphans) {
265 exit(1);
266 }
John Snowa66c9dc2014-10-01 14:19:24 -0400267}
268
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100269DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
270{
271 return drive_get(type,
272 drive_index_to_bus_id(type, index),
273 drive_index_to_unit_id(type, index));
274}
275
Markus Armbruster666daa62010-06-02 18:48:27 +0200276int drive_get_max_bus(BlockInterfaceType type)
277{
278 int max_bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200279 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200280 DriveInfo *dinfo;
281
282 max_bus = -1;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200283 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
284 dinfo = blk_legacy_dinfo(blk);
285 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200286 max_bus = dinfo->bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200287 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200288 }
289 return max_bus;
290}
291
Markus Armbruster13839972011-01-28 11:21:37 +0100292/* Get a block device. This should only be used for single-drive devices
293 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
294 appropriate bus. */
295DriveInfo *drive_get_next(BlockInterfaceType type)
296{
297 static int next_block_unit[IF_COUNT];
298
299 return drive_get(type, 0, next_block_unit[type]++);
300}
301
Markus Armbruster666daa62010-06-02 18:48:27 +0200302static void bdrv_format_print(void *opaque, const char *name)
303{
Markus Armbruster807105a2011-01-17 19:31:27 +0100304 error_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200305}
306
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000307typedef struct {
308 QEMUBH *bh;
Fam Zhengfa510eb2013-08-23 09:14:51 +0800309 BlockDriverState *bs;
310} BDRVPutRefBH;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000311
Kevin Wolfb6810722013-09-20 11:33:11 +0200312static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200313{
314 if (!strcmp(buf, "ignore")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200315 return BLOCKDEV_ON_ERROR_IGNORE;
Markus Armbruster666daa62010-06-02 18:48:27 +0200316 } else if (!is_read && !strcmp(buf, "enospc")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200317 return BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200318 } else if (!strcmp(buf, "stop")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200319 return BLOCKDEV_ON_ERROR_STOP;
Markus Armbruster666daa62010-06-02 18:48:27 +0200320 } else if (!strcmp(buf, "report")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200321 return BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200322 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200323 error_setg(errp, "'%s' invalid %s error action",
324 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200325 return -1;
326 }
327}
328
Alberto Garcia40119ef2015-11-16 11:28:38 +0200329static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
330 Error **errp)
331{
332 const QListEntry *entry;
333 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
334 switch (qobject_type(entry->value)) {
335
336 case QTYPE_QSTRING: {
337 unsigned long long length;
Max Reitz7dc847e2018-02-24 16:40:29 +0100338 const char *str = qstring_get_str(qobject_to(QString,
339 entry->value));
Alberto Garcia40119ef2015-11-16 11:28:38 +0200340 if (parse_uint_full(str, &length, 10) == 0 &&
341 length > 0 && length <= UINT_MAX) {
342 block_acct_add_interval(stats, (unsigned) length);
343 } else {
344 error_setg(errp, "Invalid interval length: %s", str);
345 return false;
346 }
347 break;
348 }
349
Marc-André Lureau01b2ffc2017-06-07 20:35:58 +0400350 case QTYPE_QNUM: {
Max Reitz7dc847e2018-02-24 16:40:29 +0100351 int64_t length = qnum_get_int(qobject_to(QNum, entry->value));
Marc-André Lureau01b2ffc2017-06-07 20:35:58 +0400352
Alberto Garcia40119ef2015-11-16 11:28:38 +0200353 if (length > 0 && length <= UINT_MAX) {
354 block_acct_add_interval(stats, (unsigned) length);
355 } else {
356 error_setg(errp, "Invalid interval length: %" PRId64, length);
357 return false;
358 }
359 break;
360 }
361
362 default:
363 error_setg(errp, "The specification of stats-intervals is invalid");
364 return false;
365 }
366 }
367 return true;
368}
369
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200370typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
371
Max Reitzfbf81752015-10-19 17:53:31 +0200372/* All parameters but @opts are optional and may be set to NULL. */
373static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
374 const char **throttling_group, ThrottleConfig *throttle_cfg,
375 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
376{
Max Reitzfbf81752015-10-19 17:53:31 +0200377 Error *local_error = NULL;
378 const char *aio;
379
380 if (bdrv_flags) {
Max Reitzfbf81752015-10-19 17:53:31 +0200381 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
382 *bdrv_flags |= BDRV_O_COPY_ON_READ;
383 }
384
Max Reitzfbf81752015-10-19 17:53:31 +0200385 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
386 if (!strcmp(aio, "native")) {
387 *bdrv_flags |= BDRV_O_NATIVE_AIO;
388 } else if (!strcmp(aio, "threads")) {
389 /* this is the default */
390 } else {
391 error_setg(errp, "invalid aio option");
392 return;
393 }
394 }
395 }
396
397 /* disk I/O throttling */
398 if (throttling_group) {
399 *throttling_group = qemu_opt_get(opts, "throttling.group");
400 }
401
402 if (throttle_cfg) {
Alberto Garcia1588ab52016-02-18 12:27:00 +0200403 throttle_config_init(throttle_cfg);
Max Reitzfbf81752015-10-19 17:53:31 +0200404 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
405 qemu_opt_get_number(opts, "throttling.bps-total", 0);
406 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
407 qemu_opt_get_number(opts, "throttling.bps-read", 0);
408 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
409 qemu_opt_get_number(opts, "throttling.bps-write", 0);
410 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
411 qemu_opt_get_number(opts, "throttling.iops-total", 0);
412 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
413 qemu_opt_get_number(opts, "throttling.iops-read", 0);
414 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
415 qemu_opt_get_number(opts, "throttling.iops-write", 0);
416
417 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
418 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
419 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
420 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
421 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
422 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
423 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
424 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
425 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
426 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
427 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
428 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
429
Alberto Garcia8a0fc182016-02-18 12:27:02 +0200430 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
431 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
432 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
433 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
434 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
435 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
436 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
437 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
438 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
439 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
440 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
441 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
442
Max Reitzfbf81752015-10-19 17:53:31 +0200443 throttle_cfg->op_size =
444 qemu_opt_get_number(opts, "throttling.iops-size", 0);
445
Alberto Garciad5851082016-02-18 12:26:59 +0200446 if (!throttle_is_valid(throttle_cfg, errp)) {
Max Reitzfbf81752015-10-19 17:53:31 +0200447 return;
448 }
449 }
450
451 if (detect_zeroes) {
452 *detect_zeroes =
Marc-André Lureauf7abe0e2017-08-24 10:46:10 +0200453 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup,
Max Reitzfbf81752015-10-19 17:53:31 +0200454 qemu_opt_get(opts, "detect-zeroes"),
Max Reitzfbf81752015-10-19 17:53:31 +0200455 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
456 &local_error);
457 if (local_error) {
458 error_propagate(errp, local_error);
459 return;
460 }
Max Reitzfbf81752015-10-19 17:53:31 +0200461 }
462}
463
Kevin Wolff298d072013-09-10 12:01:20 +0200464/* Takes the ownership of bs_opts */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200465static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
466 Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200467{
468 const char *buf;
Markus Armbruster666daa62010-06-02 18:48:27 +0200469 int bdrv_flags = 0;
470 int on_read_error, on_write_error;
Alberto Garcia362e9292015-10-28 17:33:04 +0200471 bool account_invalid, account_failed;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300472 bool writethrough, read_only;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200473 BlockBackend *blk;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200474 BlockDriverState *bs;
Benoît Canetcc0681c2013-09-02 14:14:39 +0200475 ThrottleConfig cfg;
Markus Armbruster666daa62010-06-02 18:48:27 +0200476 int snapshot = 0;
Stefan Hajnoczic5461942013-02-13 16:53:42 +0100477 Error *error = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100478 QemuOpts *opts;
Alberto Garcia40119ef2015-11-16 11:28:38 +0200479 QDict *interval_dict = NULL;
480 QList *interval_list = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100481 const char *id;
Max Reitzfbf81752015-10-19 17:53:31 +0200482 BlockdevDetectZeroesOptions detect_zeroes =
483 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
484 const char *throttling_group = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200485
Kevin Wolff298d072013-09-10 12:01:20 +0200486 /* Check common options by copying from bs_opts to opts, all other options
487 * stay in bs_opts for processing by bdrv_open(). */
488 id = qdict_get_try_str(bs_opts, "id");
Kevin Wolf00063832013-03-15 10:35:07 +0100489 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100490 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200491 error_propagate(errp, error);
Markus Armbruster6376f952014-05-28 11:17:01 +0200492 goto err_no_opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100493 }
494
Kevin Wolf00063832013-03-15 10:35:07 +0100495 qemu_opts_absorb_qdict(opts, bs_opts, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100496 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200497 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100498 goto early_err;
Kevin Wolf00063832013-03-15 10:35:07 +0100499 }
500
501 if (id) {
502 qdict_del(bs_opts, "id");
503 }
504
Markus Armbruster666daa62010-06-02 18:48:27 +0200505 /* extract parameters */
Markus Armbruster666daa62010-06-02 18:48:27 +0200506 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
Markus Armbruster666daa62010-06-02 18:48:27 +0200507
Alberto Garcia362e9292015-10-28 17:33:04 +0200508 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
509 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
510
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100511 writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
512
Alberto Garciaff356ee2016-07-08 17:03:00 +0300513 id = qemu_opts_id(opts);
514
Alberto Garcia40119ef2015-11-16 11:28:38 +0200515 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
516 qdict_array_split(interval_dict, &interval_list);
517
518 if (qdict_size(interval_dict) != 0) {
519 error_setg(errp, "Invalid option stats-intervals.%s",
520 qdict_first(interval_dict)->key);
521 goto early_err;
522 }
Alberto Garcia2be55062015-10-28 17:33:07 +0200523
Max Reitzfbf81752015-10-19 17:53:31 +0200524 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
525 &detect_zeroes, &error);
526 if (error) {
527 error_propagate(errp, error);
528 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200529 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200530
531 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
Peter Maydellc8057f92012-08-02 13:45:54 +0100532 if (is_help_option(buf)) {
533 error_printf("Supported formats:");
534 bdrv_iterate_format(bdrv_format_print, NULL);
535 error_printf("\n");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100536 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200537 }
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200538
Max Reitze4342ce2015-02-05 13:58:14 -0500539 if (qdict_haskey(bs_opts, "driver")) {
540 error_setg(errp, "Cannot specify both 'driver' and 'format'");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100541 goto early_err;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400542 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500543 qdict_put_str(bs_opts, "driver", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200544 }
545
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200546 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200547 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200548 on_write_error = parse_block_error_action(buf, 0, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100549 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200550 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100551 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200552 }
553 }
554
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200555 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200556 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200557 on_read_error = parse_block_error_action(buf, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100558 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200559 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100560 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200561 }
562 }
563
Max Reitz5ec18f82015-10-19 17:53:30 +0200564 if (snapshot) {
Kevin Wolf91a097e2015-05-08 17:49:53 +0200565 bdrv_flags |= BDRV_O_SNAPSHOT;
Max Reitz5ec18f82015-10-19 17:53:30 +0200566 }
567
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300568 read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false);
569
Kevin Wolf326642b2013-07-11 12:52:34 +0200570 /* init */
Kevin Wolf39c4ae92015-11-13 14:45:42 +0100571 if ((!file || !*file) && !qdict_size(bs_opts)) {
Max Reitz5ec18f82015-10-19 17:53:30 +0200572 BlockBackendRootState *blk_rs;
573
Kevin Wolf6d0eb642017-01-20 17:07:26 +0100574 blk = blk_new(0, BLK_PERM_ALL);
Max Reitz5ec18f82015-10-19 17:53:30 +0200575 blk_rs = blk_get_root_state(blk);
576 blk_rs->open_flags = bdrv_flags;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300577 blk_rs->read_only = read_only;
Max Reitz5ec18f82015-10-19 17:53:30 +0200578 blk_rs->detect_zeroes = detect_zeroes;
579
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200580 qobject_unref(bs_opts);
Max Reitze4342ce2015-02-05 13:58:14 -0500581 } else {
582 if (file && !*file) {
583 file = NULL;
584 }
585
Kevin Wolf91a097e2015-05-08 17:49:53 +0200586 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
587 * with other callers) rather than what we want as the real defaults.
588 * Apply the defaults here instead. */
Kevin Wolf91a097e2015-05-08 17:49:53 +0200589 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
590 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300591 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY,
592 read_only ? "on" : "off");
Kevin Wolf9384a442018-10-17 18:24:30 +0200593 qdict_set_default_str(bs_opts, BDRV_OPT_AUTO_READ_ONLY, "on");
Kevin Wolf72e775c2016-03-15 14:34:37 +0100594 assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
Kevin Wolf91a097e2015-05-08 17:49:53 +0200595
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100596 if (runstate_check(RUN_STATE_INMIGRATE)) {
597 bdrv_flags |= BDRV_O_INACTIVE;
598 }
599
Max Reitzefaa7c42016-03-16 19:54:38 +0100600 blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
Max Reitze4342ce2015-02-05 13:58:14 -0500601 if (!blk) {
602 goto err_no_bs_opts;
603 }
604 bs = blk_bs(blk);
Max Reitze4342ce2015-02-05 13:58:14 -0500605
Max Reitz5ec18f82015-10-19 17:53:30 +0200606 bs->detect_zeroes = detect_zeroes;
607
Paolo Bonzini9caa6f32017-06-05 14:39:07 +0200608 block_acct_setup(blk_get_stats(blk), account_invalid, account_failed);
Alberto Garcia2be55062015-10-28 17:33:07 +0200609
Alberto Garcia40119ef2015-11-16 11:28:38 +0200610 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
611 blk_unref(blk);
612 blk = NULL;
613 goto err_no_bs_opts;
Alberto Garcia2be55062015-10-28 17:33:07 +0200614 }
Max Reitz5ec18f82015-10-19 17:53:30 +0200615 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200616
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100617 /* disk I/O throttling */
618 if (throttle_enabled(&cfg)) {
619 if (!throttling_group) {
Alberto Garciaff356ee2016-07-08 17:03:00 +0300620 throttling_group = id;
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100621 }
622 blk_io_limits_enable(blk, throttling_group);
623 blk_set_io_limits(blk, &cfg);
624 }
625
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100626 blk_set_enable_write_cache(blk, !writethrough);
Max Reitz373340b2015-10-19 17:53:22 +0200627 blk_set_on_error(blk, on_read_error, on_write_error);
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200628
Alberto Garciaff356ee2016-07-08 17:03:00 +0300629 if (!monitor_add_blk(blk, id, errp)) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100630 blk_unref(blk);
631 blk = NULL;
632 goto err_no_bs_opts;
633 }
634
Max Reitze4342ce2015-02-05 13:58:14 -0500635err_no_bs_opts:
Kevin Wolf00063832013-03-15 10:35:07 +0100636 qemu_opts_del(opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200637 qobject_unref(interval_dict);
638 qobject_unref(interval_list);
Markus Armbruster18e46a02014-10-07 13:59:06 +0200639 return blk;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100640
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100641early_err:
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100642 qemu_opts_del(opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200643 qobject_unref(interval_dict);
644 qobject_unref(interval_list);
Markus Armbruster6376f952014-05-28 11:17:01 +0200645err_no_opts:
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +0200646 qobject_unref(bs_opts);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100647 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200648}
649
Max Reitzbd745e22015-10-19 17:53:32 +0200650/* Takes the ownership of bs_opts */
651static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
652{
Max Reitzbd745e22015-10-19 17:53:32 +0200653 int bdrv_flags = 0;
654
Kevin Wolfa81d6162016-03-07 14:23:04 +0100655 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
656 * with other callers) rather than what we want as the real defaults.
657 * Apply the defaults here instead. */
Kevin Wolfa81d6162016-03-07 14:23:04 +0100658 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
659 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300660 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off");
Kevin Wolfa81d6162016-03-07 14:23:04 +0100661
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100662 if (runstate_check(RUN_STATE_INMIGRATE)) {
663 bdrv_flags |= BDRV_O_INACTIVE;
664 }
665
Kevin Wolf74e1ae72016-09-20 20:48:52 +0200666 return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
Max Reitzbd745e22015-10-19 17:53:32 +0200667}
668
Max Reitz9c4218e2016-01-29 16:36:12 +0100669void blockdev_close_all_bdrv_states(void)
670{
671 BlockDriverState *bs, *next_bs;
672
673 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
674 AioContext *ctx = bdrv_get_aio_context(bs);
675
676 aio_context_acquire(ctx);
677 bdrv_unref(bs);
678 aio_context_release(ctx);
679 }
680}
681
Max Reitz262b4e82016-03-16 19:54:41 +0100682/* Iterates over the list of monitor-owned BlockDriverStates */
683BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
684{
685 return bs ? QTAILQ_NEXT(bs, monitor_list)
686 : QTAILQ_FIRST(&monitor_bdrv_states);
687}
688
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200689static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
690 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200691{
692 const char *value;
693
694 value = qemu_opt_get(opts, from);
695 if (value) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200696 if (qemu_opt_find(opts, to)) {
697 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
698 "same time", to, from);
699 return;
700 }
Jun Li20d6cd42014-09-24 13:45:27 +0800701 }
702
703 /* rename all items in opts */
704 while ((value = qemu_opt_get(opts, from))) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100705 qemu_opt_set(opts, to, value, &error_abort);
Kevin Wolf57975222013-07-17 14:41:54 +0200706 qemu_opt_unset(opts, from);
707 }
708}
709
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200710QemuOptsList qemu_legacy_drive_opts = {
711 .name = "drive",
712 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
713 .desc = {
714 {
Kevin Wolf87a899c2013-09-10 15:48:13 +0200715 .name = "bus",
716 .type = QEMU_OPT_NUMBER,
717 .help = "bus number",
718 },{
719 .name = "unit",
720 .type = QEMU_OPT_NUMBER,
721 .help = "unit number (i.e. lun for scsi)",
722 },{
723 .name = "index",
724 .type = QEMU_OPT_NUMBER,
725 .help = "index number",
726 },{
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200727 .name = "media",
728 .type = QEMU_OPT_STRING,
729 .help = "media type (disk, cdrom)",
Kevin Wolf593d4642013-08-28 17:24:51 +0200730 },{
731 .name = "if",
732 .type = QEMU_OPT_STRING,
733 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
Kevin Wolfb41a7332013-09-09 16:49:49 +0200734 },{
Max Reitzd095b462013-12-20 19:28:14 +0100735 .name = "file",
736 .type = QEMU_OPT_STRING,
737 .help = "file name",
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200738 },
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200739
740 /* Options that are passed on, but have special semantics with -drive */
741 {
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300742 .name = BDRV_OPT_READ_ONLY,
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200743 .type = QEMU_OPT_BOOL,
744 .help = "open drive file as read-only",
745 },{
Kevin Wolfee13ed12014-02-09 09:52:32 +0100746 .name = "rerror",
747 .type = QEMU_OPT_STRING,
748 .help = "read error action",
749 },{
750 .name = "werror",
751 .type = QEMU_OPT_STRING,
752 .help = "write error action",
753 },{
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200754 .name = "copy-on-read",
755 .type = QEMU_OPT_BOOL,
756 .help = "copy read data from backing file into image file",
757 },
758
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200759 { /* end of list */ }
760 },
761};
762
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200763DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type,
764 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200765{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200766 const char *value;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200767 BlockBackend *blk;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200768 DriveInfo *dinfo = NULL;
Kevin Wolff298d072013-09-10 12:01:20 +0200769 QDict *bs_opts;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200770 QemuOpts *legacy_opts;
771 DriveMediaType media = MEDIA_DISK;
Kevin Wolf593d4642013-08-28 17:24:51 +0200772 BlockInterfaceType type;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200773 int max_devs, bus_id, unit_id, index;
Kevin Wolfee13ed12014-02-09 09:52:32 +0100774 const char *werror, *rerror;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800775 bool read_only = false;
776 bool copy_on_read;
Max Reitzd095b462013-12-20 19:28:14 +0100777 const char *filename;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200778 Error *local_err = NULL;
Kevin Wolf247147f2014-09-24 16:37:14 +0200779 int i;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200780
Kevin Wolf57975222013-07-17 14:41:54 +0200781 /* Change legacy command line options into QMP ones */
Kevin Wolf247147f2014-09-24 16:37:14 +0200782 static const struct {
783 const char *from;
784 const char *to;
785 } opt_renames[] = {
786 { "iops", "throttling.iops-total" },
787 { "iops_rd", "throttling.iops-read" },
788 { "iops_wr", "throttling.iops-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200789
Kevin Wolf247147f2014-09-24 16:37:14 +0200790 { "bps", "throttling.bps-total" },
791 { "bps_rd", "throttling.bps-read" },
792 { "bps_wr", "throttling.bps-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200793
Kevin Wolf247147f2014-09-24 16:37:14 +0200794 { "iops_max", "throttling.iops-total-max" },
795 { "iops_rd_max", "throttling.iops-read-max" },
796 { "iops_wr_max", "throttling.iops-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200797
Kevin Wolf247147f2014-09-24 16:37:14 +0200798 { "bps_max", "throttling.bps-total-max" },
799 { "bps_rd_max", "throttling.bps-read-max" },
800 { "bps_wr_max", "throttling.bps-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200801
Kevin Wolf247147f2014-09-24 16:37:14 +0200802 { "iops_size", "throttling.iops-size" },
Benoît Canet2024c1d2013-09-02 14:14:41 +0200803
Alberto Garcia76f4afb2015-06-08 18:17:44 +0200804 { "group", "throttling.group" },
805
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300806 { "readonly", BDRV_OPT_READ_ONLY },
Kevin Wolf247147f2014-09-24 16:37:14 +0200807 };
808
809 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200810 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
811 &local_err);
812 if (local_err) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200813 error_propagate(errp, local_err);
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200814 return NULL;
815 }
Kevin Wolf247147f2014-09-24 16:37:14 +0200816 }
Kevin Wolf0f227a92013-07-19 20:07:29 +0200817
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200818 value = qemu_opt_get(all_opts, "cache");
819 if (value) {
820 int flags = 0;
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100821 bool writethrough;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200822
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100823 if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200824 error_setg(errp, "invalid cache option");
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200825 return NULL;
826 }
827
828 /* Specific options take precedence */
Kevin Wolf54861b92015-04-07 16:55:00 +0200829 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
830 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100831 !writethrough, &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200832 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200833 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
834 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100835 !!(flags & BDRV_O_NOCACHE), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200836 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200837 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
838 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100839 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200840 }
841 qemu_opt_unset(all_opts, "cache");
842 }
843
Kevin Wolff298d072013-09-10 12:01:20 +0200844 /* Get a QDict for processing the options */
845 bs_opts = qdict_new();
846 qemu_opts_to_qdict(all_opts, bs_opts);
847
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800848 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
849 &error_abort);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200850 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100851 if (local_err) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200852 error_propagate(errp, local_err);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200853 goto fail;
854 }
855
856 /* Media type */
857 value = qemu_opt_get(legacy_opts, "media");
858 if (value) {
859 if (!strcmp(value, "disk")) {
860 media = MEDIA_DISK;
861 } else if (!strcmp(value, "cdrom")) {
862 media = MEDIA_CDROM;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800863 read_only = true;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200864 } else {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200865 error_setg(errp, "'%s' invalid media", value);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200866 goto fail;
867 }
868 }
869
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200870 /* copy-on-read is disabled with a warning for read-only devices */
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300871 read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false);
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200872 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
873
874 if (read_only && copy_on_read) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700875 warn_report("disabling copy-on-read on read-only drive");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200876 copy_on_read = false;
877 }
878
Eric Blake46f5ac22017-04-27 16:58:17 -0500879 qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off");
880 qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200881
Kevin Wolf593d4642013-08-28 17:24:51 +0200882 /* Controller type */
883 value = qemu_opt_get(legacy_opts, "if");
884 if (value) {
885 for (type = 0;
886 type < IF_COUNT && strcmp(value, if_name[type]);
887 type++) {
888 }
889 if (type == IF_COUNT) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200890 error_setg(errp, "unsupported bus type '%s'", value);
Kevin Wolf593d4642013-08-28 17:24:51 +0200891 goto fail;
892 }
893 } else {
894 type = block_default_type;
895 }
896
Kevin Wolf87a899c2013-09-10 15:48:13 +0200897 /* Device address specified by bus/unit or index.
898 * If none was specified, try to find the first free one. */
899 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
900 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
901 index = qemu_opt_get_number(legacy_opts, "index", -1);
902
903 max_devs = if_max_devs[type];
904
905 if (index != -1) {
906 if (bus_id != 0 || unit_id != -1) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200907 error_setg(errp, "index cannot be used with bus and unit");
Kevin Wolf87a899c2013-09-10 15:48:13 +0200908 goto fail;
909 }
910 bus_id = drive_index_to_bus_id(type, index);
911 unit_id = drive_index_to_unit_id(type, index);
912 }
913
914 if (unit_id == -1) {
915 unit_id = 0;
916 while (drive_get(type, bus_id, unit_id) != NULL) {
917 unit_id++;
918 if (max_devs && unit_id >= max_devs) {
919 unit_id -= max_devs;
920 bus_id++;
921 }
922 }
923 }
924
925 if (max_devs && unit_id >= max_devs) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200926 error_setg(errp, "unit %d too big (max is %d)", unit_id, max_devs - 1);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200927 goto fail;
928 }
929
930 if (drive_get(type, bus_id, unit_id) != NULL) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200931 error_setg(errp, "drive with bus=%d, unit=%d (index=%d) exists",
932 bus_id, unit_id, index);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200933 goto fail;
934 }
935
936 /* no id supplied -> create one */
937 if (qemu_opts_id(all_opts) == NULL) {
938 char *new_id;
939 const char *mediastr = "";
940 if (type == IF_IDE || type == IF_SCSI) {
941 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
942 }
943 if (max_devs) {
944 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
945 mediastr, unit_id);
946 } else {
947 new_id = g_strdup_printf("%s%s%i", if_name[type],
948 mediastr, unit_id);
949 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500950 qdict_put_str(bs_opts, "id", new_id);
Kevin Wolf87a899c2013-09-10 15:48:13 +0200951 g_free(new_id);
952 }
953
Kevin Wolf394c7d42013-09-13 14:09:17 +0200954 /* Add virtio block device */
Kevin Wolf394c7d42013-09-13 14:09:17 +0200955 if (type == IF_VIRTIO) {
956 QemuOpts *devopts;
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800957 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
958 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200959 if (arch_type == QEMU_ARCH_S390X) {
Alexander Graf1f68f1d2015-06-16 23:06:33 +0200960 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200961 } else {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100962 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200963 }
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100964 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
965 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200966 }
967
Max Reitzd095b462013-12-20 19:28:14 +0100968 filename = qemu_opt_get(legacy_opts, "file");
969
Kevin Wolfee13ed12014-02-09 09:52:32 +0100970 /* Check werror/rerror compatibility with if=... */
971 werror = qemu_opt_get(legacy_opts, "werror");
972 if (werror != NULL) {
973 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
974 type != IF_NONE) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200975 error_setg(errp, "werror is not supported by this bus type");
Kevin Wolfee13ed12014-02-09 09:52:32 +0100976 goto fail;
977 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500978 qdict_put_str(bs_opts, "werror", werror);
Kevin Wolfee13ed12014-02-09 09:52:32 +0100979 }
980
981 rerror = qemu_opt_get(legacy_opts, "rerror");
982 if (rerror != NULL) {
983 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
984 type != IF_NONE) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200985 error_setg(errp, "rerror is not supported by this bus type");
Kevin Wolfee13ed12014-02-09 09:52:32 +0100986 goto fail;
987 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500988 qdict_put_str(bs_opts, "rerror", rerror);
Kevin Wolfee13ed12014-02-09 09:52:32 +0100989 }
990
Kevin Wolf2d246f02013-09-18 15:14:47 +0200991 /* Actual block device init: Functionality shared with blockdev-add */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200992 blk = blockdev_init(filename, bs_opts, &local_err);
Markus Armbruster3cb0e252014-05-28 11:17:02 +0200993 bs_opts = NULL;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200994 if (!blk) {
Markus Armbruster84d18f02014-01-30 15:07:28 +0100995 if (local_err) {
Markus Armbrusterc4f26c92018-10-17 10:26:57 +0200996 error_propagate(errp, local_err);
Kevin Wolfb6810722013-09-20 11:33:11 +0200997 }
Kevin Wolf2d246f02013-09-18 15:14:47 +0200998 goto fail;
Kevin Wolfb6810722013-09-20 11:33:11 +0200999 } else {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001000 assert(!local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001001 }
1002
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001003 /* Create legacy DriveInfo */
1004 dinfo = g_malloc0(sizeof(*dinfo));
Kevin Wolff298d072013-09-10 12:01:20 +02001005 dinfo->opts = all_opts;
Kevin Wolf2d246f02013-09-18 15:14:47 +02001006
Kevin Wolfee13ed12014-02-09 09:52:32 +01001007 dinfo->type = type;
Kevin Wolf87a899c2013-09-10 15:48:13 +02001008 dinfo->bus = bus_id;
1009 dinfo->unit = unit_id;
Kevin Wolfbcf83152014-06-06 15:21:48 +02001010
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001011 blk_set_legacy_dinfo(blk, dinfo);
1012
Kevin Wolfe34ef042013-09-19 14:24:10 +02001013 switch(type) {
1014 case IF_IDE:
1015 case IF_SCSI:
1016 case IF_XEN:
1017 case IF_NONE:
1018 dinfo->media_cd = media == MEDIA_CDROM;
1019 break;
1020 default:
1021 break;
1022 }
1023
Kevin Wolf2d246f02013-09-18 15:14:47 +02001024fail:
Kevin Wolf33cb7dc2013-08-28 17:00:13 +02001025 qemu_opts_del(legacy_opts);
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +02001026 qobject_unref(bs_opts);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001027 return dinfo;
Kevin Wolf57975222013-07-17 14:41:54 +02001028}
1029
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02001030static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp)
1031{
1032 BlockDriverState *bs;
1033
1034 bs = bdrv_lookup_bs(name, name, errp);
1035 if (bs == NULL) {
1036 return NULL;
1037 }
1038
1039 if (!bdrv_is_root_node(bs)) {
1040 error_setg(errp, "Need a root block node");
1041 return NULL;
1042 }
1043
1044 if (!bdrv_is_inserted(bs)) {
1045 error_setg(errp, "Device has no medium");
1046 return NULL;
1047 }
1048
1049 return bs;
1050}
1051
Kevin Wolfb33945c2016-09-20 13:38:43 +02001052static BlockBackend *qmp_get_blk(const char *blk_name, const char *qdev_id,
1053 Error **errp)
1054{
1055 BlockBackend *blk;
1056
1057 if (!blk_name == !qdev_id) {
1058 error_setg(errp, "Need exactly one of 'device' and 'id'");
1059 return NULL;
1060 }
1061
1062 if (qdev_id) {
1063 blk = blk_by_qdev_id(qdev_id, errp);
1064 } else {
1065 blk = blk_by_name(blk_name);
1066 if (blk == NULL) {
1067 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1068 "Device '%s' not found", blk_name);
1069 }
1070 }
1071
1072 return blk;
1073}
1074
Markus Armbruster3e5a50d2015-02-06 13:55:43 +01001075void hmp_commit(Monitor *mon, const QDict *qdict)
Markus Armbruster666daa62010-06-02 18:48:27 +02001076{
Markus Armbruster666daa62010-06-02 18:48:27 +02001077 const char *device = qdict_get_str(qdict, "device");
Fam Zhenga0e85442015-03-02 19:36:48 +08001078 BlockBackend *blk;
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001079 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +02001080
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001081 if (!strcmp(device, "all")) {
Max Reitzda31d592016-03-16 19:54:32 +01001082 ret = blk_commit_all();
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001083 } else {
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001084 BlockDriverState *bs;
1085 AioContext *aio_context;
1086
Fam Zhenga0e85442015-03-02 19:36:48 +08001087 blk = blk_by_name(device);
1088 if (!blk) {
Jeff Cody58513bd2013-01-18 12:45:35 -05001089 monitor_printf(mon, "Device '%s' not found\n", device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001090 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001091 }
Max Reitz5433c242015-10-19 17:53:29 +02001092 if (!blk_is_available(blk)) {
1093 monitor_printf(mon, "Device '%s' has no medium\n", device);
1094 return;
1095 }
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001096
1097 bs = blk_bs(blk);
1098 aio_context = bdrv_get_aio_context(bs);
1099 aio_context_acquire(aio_context);
1100
1101 ret = bdrv_commit(bs);
1102
1103 aio_context_release(aio_context);
Jeff Cody58513bd2013-01-18 12:45:35 -05001104 }
1105 if (ret < 0) {
1106 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1107 strerror(-ret));
Markus Armbruster666daa62010-06-02 18:48:27 +02001108 }
1109}
1110
Eric Blake10f75902016-03-03 09:16:50 -07001111static void blockdev_do_action(TransactionAction *action, Error **errp)
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001112{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001113 TransactionActionList list;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001114
Eric Blake10f75902016-03-03 09:16:50 -07001115 list.value = action;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001116 list.next = NULL;
John Snow94d16a62015-11-05 18:13:18 -05001117 qmp_transaction(&list, false, NULL, errp);
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001118}
1119
Benoît Canet0901f672014-01-23 21:31:38 +01001120void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1121 bool has_node_name, const char *node_name,
1122 const char *snapshot_file,
1123 bool has_snapshot_node_name,
1124 const char *snapshot_node_name,
Luiz Capitulino6106e242011-11-25 16:15:19 -02001125 bool has_format, const char *format,
Benoît Canet0901f672014-01-23 21:31:38 +01001126 bool has_mode, NewImageMode mode, Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +01001127{
Alberto Garciaa911e6a2015-10-26 14:27:14 +02001128 BlockdevSnapshotSync snapshot = {
Benoît Canet0901f672014-01-23 21:31:38 +01001129 .has_device = has_device,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001130 .device = (char *) device,
Benoît Canet0901f672014-01-23 21:31:38 +01001131 .has_node_name = has_node_name,
1132 .node_name = (char *) node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001133 .snapshot_file = (char *) snapshot_file,
Benoît Canet0901f672014-01-23 21:31:38 +01001134 .has_snapshot_node_name = has_snapshot_node_name,
1135 .snapshot_node_name = (char *) snapshot_node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001136 .has_format = has_format,
1137 .format = (char *) format,
1138 .has_mode = has_mode,
1139 .mode = mode,
1140 };
Eric Blake10f75902016-03-03 09:16:50 -07001141 TransactionAction action = {
1142 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001143 .u.blockdev_snapshot_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001144 };
1145 blockdev_do_action(&action, errp);
Jes Sorensenf8882562010-12-16 13:52:16 +01001146}
1147
Alberto Garcia43de7e22015-10-26 14:27:16 +02001148void qmp_blockdev_snapshot(const char *node, const char *overlay,
1149 Error **errp)
1150{
1151 BlockdevSnapshot snapshot_data = {
1152 .node = (char *) node,
1153 .overlay = (char *) overlay
1154 };
Eric Blake10f75902016-03-03 09:16:50 -07001155 TransactionAction action = {
1156 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
Eric Blake32bafa82016-03-17 16:48:37 -06001157 .u.blockdev_snapshot.data = &snapshot_data,
Eric Blake10f75902016-03-03 09:16:50 -07001158 };
1159 blockdev_do_action(&action, errp);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001160}
1161
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001162void qmp_blockdev_snapshot_internal_sync(const char *device,
1163 const char *name,
1164 Error **errp)
1165{
1166 BlockdevSnapshotInternal snapshot = {
1167 .device = (char *) device,
1168 .name = (char *) name
1169 };
Eric Blake10f75902016-03-03 09:16:50 -07001170 TransactionAction action = {
1171 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001172 .u.blockdev_snapshot_internal_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001173 };
1174 blockdev_do_action(&action, errp);
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001175}
1176
Wenchao Xia44e3e052013-09-11 14:04:36 +08001177SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1178 bool has_id,
1179 const char *id,
1180 bool has_name,
1181 const char *name,
1182 Error **errp)
1183{
Fam Zhenga0e85442015-03-02 19:36:48 +08001184 BlockDriverState *bs;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001185 AioContext *aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001186 QEMUSnapshotInfo sn;
1187 Error *local_err = NULL;
1188 SnapshotInfo *info = NULL;
1189 int ret;
1190
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001191 bs = qmp_get_root_bs(device, errp);
1192 if (!bs) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001193 return NULL;
1194 }
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001195 aio_context = bdrv_get_aio_context(bs);
Max Reitz5433c242015-10-19 17:53:29 +02001196 aio_context_acquire(aio_context);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001197
1198 if (!has_id) {
1199 id = NULL;
1200 }
1201
1202 if (!has_name) {
1203 name = NULL;
1204 }
1205
1206 if (!id && !name) {
1207 error_setg(errp, "Name or id must be provided");
Max Reitz5433c242015-10-19 17:53:29 +02001208 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001209 }
1210
Stefan Hajnoczi0b928852014-11-19 14:19:43 +00001211 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1212 goto out_aio_context;
1213 }
1214
Wenchao Xia44e3e052013-09-11 14:04:36 +08001215 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001216 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001217 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001218 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001219 }
1220 if (!ret) {
1221 error_setg(errp,
1222 "Snapshot with id '%s' and name '%s' does not exist on "
1223 "device '%s'",
1224 STR_OR_NULL(id), STR_OR_NULL(name), device);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001225 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001226 }
1227
1228 bdrv_snapshot_delete(bs, id, name, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001229 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001230 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001231 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001232 }
1233
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001234 aio_context_release(aio_context);
1235
Markus Armbruster5839e532014-08-19 10:31:08 +02001236 info = g_new0(SnapshotInfo, 1);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001237 info->id = g_strdup(sn.id_str);
1238 info->name = g_strdup(sn.name);
1239 info->date_nsec = sn.date_nsec;
1240 info->date_sec = sn.date_sec;
1241 info->vm_state_size = sn.vm_state_size;
1242 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1243 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1244
1245 return info;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001246
1247out_aio_context:
1248 aio_context_release(aio_context);
1249 return NULL;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001250}
Jeff Cody8802d1f2012-02-28 15:54:06 -05001251
John Snow341ebc22015-04-17 19:49:52 -04001252/**
1253 * block_dirty_bitmap_lookup:
1254 * Return a dirty bitmap (if present), after validating
1255 * the node reference and bitmap names.
1256 *
1257 * @node: The name of the BDS node to search for bitmaps
1258 * @name: The name of the bitmap to search for
1259 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1260 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1261 * @errp: Output pointer for error information. Can be NULL.
1262 *
1263 * @return: A bitmap object on success, or NULL on failure.
1264 */
1265static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1266 const char *name,
1267 BlockDriverState **pbs,
John Snow341ebc22015-04-17 19:49:52 -04001268 Error **errp)
1269{
1270 BlockDriverState *bs;
1271 BdrvDirtyBitmap *bitmap;
John Snow341ebc22015-04-17 19:49:52 -04001272
1273 if (!node) {
1274 error_setg(errp, "Node cannot be NULL");
1275 return NULL;
1276 }
1277 if (!name) {
1278 error_setg(errp, "Bitmap name cannot be NULL");
1279 return NULL;
1280 }
1281 bs = bdrv_lookup_bs(node, node, NULL);
1282 if (!bs) {
1283 error_setg(errp, "Node '%s' not found", node);
1284 return NULL;
1285 }
1286
John Snow341ebc22015-04-17 19:49:52 -04001287 bitmap = bdrv_find_dirty_bitmap(bs, name);
1288 if (!bitmap) {
1289 error_setg(errp, "Dirty bitmap '%s' not found", name);
Paolo Bonzini21198822017-06-05 14:39:03 +02001290 return NULL;
John Snow341ebc22015-04-17 19:49:52 -04001291 }
1292
1293 if (pbs) {
1294 *pbs = bs;
1295 }
John Snow341ebc22015-04-17 19:49:52 -04001296
1297 return bitmap;
John Snow341ebc22015-04-17 19:49:52 -04001298}
1299
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00001300/* New and old BlockDriverState structs for atomic group operations */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001301
John Snow50f43f02015-11-05 18:13:09 -05001302typedef struct BlkActionState BlkActionState;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001303
John Snow50f43f02015-11-05 18:13:09 -05001304/**
1305 * BlkActionOps:
1306 * Table of operations that define an Action.
1307 *
1308 * @instance_size: Size of state struct, in bytes.
1309 * @prepare: Prepare the work, must NOT be NULL.
1310 * @commit: Commit the changes, can be NULL.
1311 * @abort: Abort the changes on fail, can be NULL.
1312 * @clean: Clean up resources after all transaction actions have called
1313 * commit() or abort(). Can be NULL.
1314 *
1315 * Only prepare() may fail. In a single transaction, only one of commit() or
1316 * abort() will be called. clean() will always be called if it is present.
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001317 */
John Snow50f43f02015-11-05 18:13:09 -05001318typedef struct BlkActionOps {
1319 size_t instance_size;
1320 void (*prepare)(BlkActionState *common, Error **errp);
1321 void (*commit)(BlkActionState *common);
1322 void (*abort)(BlkActionState *common);
1323 void (*clean)(BlkActionState *common);
1324} BlkActionOps;
1325
1326/**
1327 * BlkActionState:
1328 * Describes one Action's state within a Transaction.
1329 *
1330 * @action: QAPI-defined enum identifying which Action to perform.
1331 * @ops: Table of ActionOps this Action can perform.
John Snow94d16a62015-11-05 18:13:18 -05001332 * @block_job_txn: Transaction which this action belongs to.
John Snow50f43f02015-11-05 18:13:09 -05001333 * @entry: List membership for all Actions in this Transaction.
1334 *
1335 * This structure must be arranged as first member in a subclassed type,
1336 * assuming that the compiler will also arrange it to the same offsets as the
1337 * base class.
1338 */
1339struct BlkActionState {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001340 TransactionAction *action;
John Snow50f43f02015-11-05 18:13:09 -05001341 const BlkActionOps *ops;
Kevin Wolf62c9e412018-04-19 16:09:52 +02001342 JobTxn *block_job_txn;
John Snow94d16a62015-11-05 18:13:18 -05001343 TransactionProperties *txn_props;
John Snow50f43f02015-11-05 18:13:09 -05001344 QSIMPLEQ_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 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001632 bdrv_img_create(new_image_file, format,
1633 state->old_bs->filename,
1634 state->old_bs->drv->format_name,
Fam Zheng92172832017-04-21 20:27:01 +08001635 NULL, size, flags, false, &local_err);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001636 if (local_err) {
1637 error_propagate(errp, local_err);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001638 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001639 }
1640 }
1641
1642 options = qdict_new();
1643 if (s->has_snapshot_node_name) {
Eric Blake46f5ac22017-04-27 16:58:17 -05001644 qdict_put_str(options, "node-name", snapshot_node_name);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001645 }
Eric Blake46f5ac22017-04-27 16:58:17 -05001646 qdict_put_str(options, "driver", format);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001647 }
1648
Max Reitz5b363932016-05-17 16:41:31 +02001649 state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags,
1650 errp);
Max Reitzf67503e2014-02-18 18:33:05 +01001651 /* We will manually add the backing_hd field to the bs later */
Max Reitz5b363932016-05-17 16:41:31 +02001652 if (!state->new_bs) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001653 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001654 }
1655
Kevin Wolf1f0c4612016-03-22 18:38:44 +01001656 if (bdrv_has_blk(state->new_bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02001657 error_setg(errp, "The snapshot is already in use");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001658 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001659 }
1660
1661 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1662 errp)) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001663 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001664 }
1665
1666 if (state->new_bs->backing != NULL) {
1667 error_setg(errp, "The snapshot already has a backing image");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001668 goto out;
Alberto Garcia08b24cf2015-11-03 12:32:35 +02001669 }
1670
1671 if (!state->new_bs->drv->supports_backing) {
1672 error_setg(errp, "The snapshot does not support backing images");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001673 goto out;
Kevin Wolfb2c28322017-02-20 12:46:42 +01001674 }
1675
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001676 bdrv_set_aio_context(state->new_bs, aio_context);
Fam Zhengc26a5ab2017-04-07 14:54:09 +08001677
Kevin Wolfb2c28322017-02-20 12:46:42 +01001678 /* This removes our old bs and adds the new bs. This is an operation that
1679 * can fail, so we need to do it in .prepare; undoing it for abort is
1680 * always possible. */
1681 bdrv_ref(state->new_bs);
1682 bdrv_append(state->new_bs, state->old_bs, &local_err);
1683 if (local_err) {
1684 error_propagate(errp, local_err);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001685 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001686 }
Kevin Wolf067acf22017-03-02 15:26:18 +01001687 state->overlay_appended = true;
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001688
1689out:
1690 aio_context_release(aio_context);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001691}
1692
John Snow50f43f02015-11-05 18:13:09 -05001693static void external_snapshot_commit(BlkActionState *common)
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001694{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001695 ExternalSnapshotState *state =
1696 DO_UPCAST(ExternalSnapshotState, common, common);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001697 AioContext *aio_context;
1698
1699 aio_context = bdrv_get_aio_context(state->old_bs);
1700 aio_context_acquire(aio_context);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001701
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001702 /* We don't need (or want) to use the transactional
1703 * bdrv_reopen_multiple() across all the entries at once, because we
1704 * don't want to abort all of them if one of them fails the reopen */
Paolo Bonzinid3faa132017-06-05 14:38:50 +02001705 if (!atomic_read(&state->old_bs->copy_on_read)) {
Kevin Wolf4c844982016-02-29 13:12:26 +01001706 bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
1707 NULL);
1708 }
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,
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04001969 action->has_x_disabled, action->x_disabled,
Fam Zhengdf9a6812015-11-09 18:16:54 +08001970 &local_err);
1971
1972 if (!local_err) {
1973 state->prepared = true;
1974 } else {
1975 error_propagate(errp, local_err);
1976 }
1977}
1978
John Snow50f43f02015-11-05 18:13:09 -05001979static void block_dirty_bitmap_add_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08001980{
1981 BlockDirtyBitmapAdd *action;
1982 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1983 common, common);
1984
Eric Blake32bafa82016-03-17 16:48:37 -06001985 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08001986 /* Should not be able to fail: IF the bitmap was added via .prepare(),
1987 * then the node reference and bitmap name must have been valid.
1988 */
1989 if (state->prepared) {
1990 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
1991 }
1992}
1993
John Snow50f43f02015-11-05 18:13:09 -05001994static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08001995 Error **errp)
1996{
1997 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
1998 common, common);
1999 BlockDirtyBitmap *action;
2000
John Snow94d16a62015-11-05 18:13:18 -05002001 if (action_check_completion_mode(common, errp) < 0) {
2002 return;
2003 }
2004
Eric Blake32bafa82016-03-17 16:48:37 -06002005 action = common->action->u.block_dirty_bitmap_clear.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002006 state->bitmap = block_dirty_bitmap_lookup(action->node,
2007 action->name,
2008 &state->bs,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002009 errp);
2010 if (!state->bitmap) {
2011 return;
2012 }
2013
John Snow993edc02018-10-29 16:23:16 -04002014 if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
2015 error_setg(errp, "Cannot modify a bitmap in use by another operation");
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04002016 return;
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002017 } else if (bdrv_dirty_bitmap_readonly(state->bitmap)) {
2018 error_setg(errp, "Cannot clear a readonly bitmap");
2019 return;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002020 }
2021
2022 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
Fam Zhengdf9a6812015-11-09 18:16:54 +08002023}
2024
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002025static void block_dirty_bitmap_restore(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002026{
2027 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2028 common, common);
2029
John Snow184dd9c2017-03-15 17:28:11 -04002030 if (state->backup) {
Vladimir Sementsov-Ogievskiy56bd6622018-10-29 16:23:14 -04002031 bdrv_restore_dirty_bitmap(state->bitmap, state->backup);
John Snow184dd9c2017-03-15 17:28:11 -04002032 }
Fam Zhengdf9a6812015-11-09 18:16:54 +08002033}
2034
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002035static void block_dirty_bitmap_free_backup(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002036{
2037 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2038 common, common);
2039
2040 hbitmap_free(state->backup);
2041}
2042
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002043static void block_dirty_bitmap_enable_prepare(BlkActionState *common,
2044 Error **errp)
2045{
2046 BlockDirtyBitmap *action;
2047 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2048 common, common);
2049
2050 if (action_check_completion_mode(common, errp) < 0) {
2051 return;
2052 }
2053
2054 action = common->action->u.x_block_dirty_bitmap_enable.data;
2055 state->bitmap = block_dirty_bitmap_lookup(action->node,
2056 action->name,
2057 NULL,
2058 errp);
2059 if (!state->bitmap) {
2060 return;
2061 }
2062
John Snowb053bb52018-10-29 16:23:16 -04002063 if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
2064 error_setg(errp,
2065 "Bitmap '%s' is currently in use by another operation"
2066 " and cannot be enabled", action->name);
2067 return;
2068 }
2069
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002070 state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
2071 bdrv_enable_dirty_bitmap(state->bitmap);
2072}
2073
2074static void block_dirty_bitmap_enable_abort(BlkActionState *common)
2075{
2076 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2077 common, common);
2078
2079 if (!state->was_enabled) {
2080 bdrv_disable_dirty_bitmap(state->bitmap);
2081 }
2082}
2083
2084static void block_dirty_bitmap_disable_prepare(BlkActionState *common,
2085 Error **errp)
2086{
2087 BlockDirtyBitmap *action;
2088 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2089 common, common);
2090
2091 if (action_check_completion_mode(common, errp) < 0) {
2092 return;
2093 }
2094
2095 action = common->action->u.x_block_dirty_bitmap_disable.data;
2096 state->bitmap = block_dirty_bitmap_lookup(action->node,
2097 action->name,
2098 NULL,
2099 errp);
2100 if (!state->bitmap) {
2101 return;
2102 }
2103
John Snowb053bb52018-10-29 16:23:16 -04002104 if (bdrv_dirty_bitmap_user_locked(state->bitmap)) {
2105 error_setg(errp,
2106 "Bitmap '%s' is currently in use by another operation"
2107 " and cannot be disabled", action->name);
2108 return;
2109 }
2110
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002111 state->was_enabled = bdrv_dirty_bitmap_enabled(state->bitmap);
2112 bdrv_disable_dirty_bitmap(state->bitmap);
2113}
2114
2115static void block_dirty_bitmap_disable_abort(BlkActionState *common)
2116{
2117 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2118 common, common);
2119
2120 if (state->was_enabled) {
2121 bdrv_enable_dirty_bitmap(state->bitmap);
2122 }
2123}
2124
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002125static void block_dirty_bitmap_merge_prepare(BlkActionState *common,
2126 Error **errp)
2127{
2128 BlockDirtyBitmapMerge *action;
2129 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2130 common, common);
2131 BdrvDirtyBitmap *merge_source;
2132
2133 if (action_check_completion_mode(common, errp) < 0) {
2134 return;
2135 }
2136
2137 action = common->action->u.x_block_dirty_bitmap_merge.data;
2138 state->bitmap = block_dirty_bitmap_lookup(action->node,
2139 action->dst_name,
2140 &state->bs,
2141 errp);
2142 if (!state->bitmap) {
2143 return;
2144 }
2145
2146 merge_source = bdrv_find_dirty_bitmap(state->bs, action->src_name);
2147 if (!merge_source) {
2148 return;
2149 }
2150
2151 bdrv_merge_dirty_bitmap(state->bitmap, merge_source, &state->backup, errp);
2152}
2153
John Snow50f43f02015-11-05 18:13:09 -05002154static void abort_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002155{
2156 error_setg(errp, "Transaction aborted using Abort action");
2157}
2158
John Snow50f43f02015-11-05 18:13:09 -05002159static void abort_commit(BlkActionState *common)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002160{
Stefan Weildfc6f862013-07-25 18:21:28 +02002161 g_assert_not_reached(); /* this action never succeeds */
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002162}
2163
John Snow50f43f02015-11-05 18:13:09 -05002164static const BlkActionOps actions[] = {
Alberto Garcia43de7e22015-10-26 14:27:16 +02002165 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2166 .instance_size = sizeof(ExternalSnapshotState),
2167 .prepare = external_snapshot_prepare,
2168 .commit = external_snapshot_commit,
2169 .abort = external_snapshot_abort,
Alberto Garcia4ad6f3d2015-11-13 15:00:24 +02002170 .clean = external_snapshot_clean,
Alberto Garcia43de7e22015-10-26 14:27:16 +02002171 },
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002172 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002173 .instance_size = sizeof(ExternalSnapshotState),
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002174 .prepare = external_snapshot_prepare,
2175 .commit = external_snapshot_commit,
2176 .abort = external_snapshot_abort,
Fam Zhengda763e82015-10-23 11:08:10 +08002177 .clean = external_snapshot_clean,
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002178 },
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002179 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2180 .instance_size = sizeof(DriveBackupState),
2181 .prepare = drive_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002182 .commit = drive_backup_commit,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002183 .abort = drive_backup_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002184 .clean = drive_backup_clean,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002185 },
Fam Zhengbd8baec2014-12-18 18:37:06 +08002186 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2187 .instance_size = sizeof(BlockdevBackupState),
2188 .prepare = blockdev_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002189 .commit = blockdev_backup_commit,
Fam Zhengbd8baec2014-12-18 18:37:06 +08002190 .abort = blockdev_backup_abort,
2191 .clean = blockdev_backup_clean,
2192 },
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002193 [TRANSACTION_ACTION_KIND_ABORT] = {
John Snow50f43f02015-11-05 18:13:09 -05002194 .instance_size = sizeof(BlkActionState),
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002195 .prepare = abort_prepare,
2196 .commit = abort_commit,
2197 },
Wenchao Xiabbe86012013-09-11 14:04:34 +08002198 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2199 .instance_size = sizeof(InternalSnapshotState),
2200 .prepare = internal_snapshot_prepare,
2201 .abort = internal_snapshot_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002202 .clean = internal_snapshot_clean,
Wenchao Xiabbe86012013-09-11 14:04:34 +08002203 },
Fam Zhengdf9a6812015-11-09 18:16:54 +08002204 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2205 .instance_size = sizeof(BlockDirtyBitmapState),
2206 .prepare = block_dirty_bitmap_add_prepare,
2207 .abort = block_dirty_bitmap_add_abort,
2208 },
2209 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2210 .instance_size = sizeof(BlockDirtyBitmapState),
2211 .prepare = block_dirty_bitmap_clear_prepare,
Vladimir Sementsov-Ogievskiy5c4cf8b2018-10-29 16:23:15 -04002212 .commit = block_dirty_bitmap_free_backup,
2213 .abort = block_dirty_bitmap_restore,
Vladimir Sementsov-Ogievskiyc6490442018-06-11 14:53:32 -04002214 },
2215 [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_ENABLE] = {
2216 .instance_size = sizeof(BlockDirtyBitmapState),
2217 .prepare = block_dirty_bitmap_enable_prepare,
2218 .abort = block_dirty_bitmap_enable_abort,
2219 },
2220 [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_DISABLE] = {
2221 .instance_size = sizeof(BlockDirtyBitmapState),
2222 .prepare = block_dirty_bitmap_disable_prepare,
2223 .abort = block_dirty_bitmap_disable_abort,
John Snow66da04d2018-09-06 09:02:25 -04002224 },
Vladimir Sementsov-Ogievskiy6fd2e402018-10-29 16:23:15 -04002225 [TRANSACTION_ACTION_KIND_X_BLOCK_DIRTY_BITMAP_MERGE] = {
2226 .instance_size = sizeof(BlockDirtyBitmapState),
2227 .prepare = block_dirty_bitmap_merge_prepare,
2228 .commit = block_dirty_bitmap_free_backup,
2229 .abort = block_dirty_bitmap_restore,
2230 },
John Snow66da04d2018-09-06 09:02:25 -04002231 /* Where are transactions for MIRROR, COMMIT and STREAM?
2232 * Although these blockjobs use transaction callbacks like the backup job,
2233 * these jobs do not necessarily adhere to transaction semantics.
2234 * These jobs may not fully undo all of their actions on abort, nor do they
2235 * necessarily work in transactions with more than one job in them.
2236 */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002237};
2238
John Snow94d16a62015-11-05 18:13:18 -05002239/**
2240 * Allocate a TransactionProperties structure if necessary, and fill
2241 * that structure with desired defaults if they are unset.
2242 */
2243static TransactionProperties *get_transaction_properties(
2244 TransactionProperties *props)
2245{
2246 if (!props) {
2247 props = g_new0(TransactionProperties, 1);
2248 }
2249
2250 if (!props->has_completion_mode) {
2251 props->has_completion_mode = true;
2252 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2253 }
2254
2255 return props;
2256}
2257
Jeff Cody8802d1f2012-02-28 15:54:06 -05002258/*
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002259 * 'Atomic' group operations. The operations are performed as a set, and if
2260 * any fail then we roll back all operations in the group.
Jeff Cody8802d1f2012-02-28 15:54:06 -05002261 */
John Snow94d16a62015-11-05 18:13:18 -05002262void qmp_transaction(TransactionActionList *dev_list,
2263 bool has_props,
2264 struct TransactionProperties *props,
2265 Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -05002266{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002267 TransactionActionList *dev_entry = dev_list;
Kevin Wolf62c9e412018-04-19 16:09:52 +02002268 JobTxn *block_job_txn = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002269 BlkActionState *state, *next;
Luiz Capitulino43e17042012-11-30 10:52:07 -02002270 Error *local_err = NULL;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002271
John Snow50f43f02015-11-05 18:13:09 -05002272 QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002273 QSIMPLEQ_INIT(&snap_bdrv_states);
2274
John Snow94d16a62015-11-05 18:13:18 -05002275 /* Does this transaction get canceled as a group on failure?
Kevin Wolf62c9e412018-04-19 16:09:52 +02002276 * If not, we don't really need to make a JobTxn.
John Snow94d16a62015-11-05 18:13:18 -05002277 */
2278 props = get_transaction_properties(props);
2279 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02002280 block_job_txn = job_txn_new();
John Snow94d16a62015-11-05 18:13:18 -05002281 }
2282
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002283 /* drain all i/o before any operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002284 bdrv_drain_all();
2285
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002286 /* We don't do anything in this loop that commits us to the operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002287 while (NULL != dev_entry) {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002288 TransactionAction *dev_info = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002289 const BlkActionOps *ops;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002290
Jeff Cody8802d1f2012-02-28 15:54:06 -05002291 dev_info = dev_entry->value;
2292 dev_entry = dev_entry->next;
2293
Eric Blake6a8f9662015-10-26 16:34:54 -06002294 assert(dev_info->type < ARRAY_SIZE(actions));
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002295
Eric Blake6a8f9662015-10-26 16:34:54 -06002296 ops = &actions[dev_info->type];
Max Reitzaa3fe712013-09-12 14:57:27 +02002297 assert(ops->instance_size > 0);
2298
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002299 state = g_malloc0(ops->instance_size);
2300 state->ops = ops;
2301 state->action = dev_info;
John Snow94d16a62015-11-05 18:13:18 -05002302 state->block_job_txn = block_job_txn;
2303 state->txn_props = props;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002304 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002305
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002306 state->ops->prepare(state, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002307 if (local_err) {
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002308 error_propagate(errp, local_err);
2309 goto delete_and_fail;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002310 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002311 }
2312
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002313 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02002314 if (state->ops->commit) {
2315 state->ops->commit(state);
2316 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002317 }
2318
2319 /* success */
2320 goto exit;
2321
2322delete_and_fail:
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002323 /* failure, and it is all-or-none; roll back all operations */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002324 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2325 if (state->ops->abort) {
2326 state->ops->abort(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002327 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002328 }
2329exit:
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002330 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
2331 if (state->ops->clean) {
2332 state->ops->clean(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002333 }
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002334 g_free(state);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002335 }
John Snow94d16a62015-11-05 18:13:18 -05002336 if (!has_props) {
2337 qapi_free_TransactionProperties(props);
2338 }
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02002339 job_txn_unref(block_job_txn);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002340}
2341
Kevin Wolffbe2d812016-09-20 13:38:46 +02002342void qmp_eject(bool has_device, const char *device,
2343 bool has_id, const char *id,
2344 bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002345{
Max Reitz38f54bd2015-10-26 21:39:12 +01002346 Error *local_err = NULL;
John Snow3a3086b2016-05-18 17:53:40 -04002347 int rc;
Markus Armbruster666daa62010-06-02 18:48:27 +02002348
John Snow3a3086b2016-05-18 17:53:40 -04002349 if (!has_force) {
2350 force = false;
2351 }
2352
Kevin Wolffbe2d812016-09-20 13:38:46 +02002353 rc = do_open_tray(has_device ? device : NULL,
2354 has_id ? id : NULL,
2355 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002356 if (rc && rc != -ENOSYS) {
Max Reitz38f54bd2015-10-26 21:39:12 +01002357 error_propagate(errp, local_err);
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02002358 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002359 }
Colin Lordbf18bee2016-06-06 14:15:22 -04002360 error_free(local_err);
John Snow3a3086b2016-05-18 17:53:40 -04002361
Max Reitz82fcf662017-11-10 23:43:01 +01002362 blockdev_remove_medium(has_device, device, has_id, id, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02002363}
2364
Benoît Canet12d3ba82014-01-23 21:31:35 +01002365void qmp_block_passwd(bool has_device, const char *device,
2366 bool has_node_name, const char *node_name,
2367 const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002368{
Daniel P. Berrangec01c2142017-06-23 17:24:16 +01002369 error_setg(errp,
2370 "Setting block passwords directly is no longer supported");
Markus Armbruster666daa62010-06-02 18:48:27 +02002371}
2372
Colin Lordbf18bee2016-06-06 14:15:22 -04002373/*
2374 * Attempt to open the tray of @device.
2375 * If @force, ignore its tray lock.
2376 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2377 * On error, store an error through @errp and return -errno.
2378 * If @device does not exist, return -ENODEV.
2379 * If it has no removable media, return -ENOTSUP.
2380 * If it has no tray, return -ENOSYS.
2381 * If the guest was asked to open the tray, return -EINPROGRESS.
2382 * Else, return 0.
John Snow3a3086b2016-05-18 17:53:40 -04002383 */
Kevin Wolfb33945c2016-09-20 13:38:43 +02002384static int do_open_tray(const char *blk_name, const char *qdev_id,
2385 bool force, Error **errp)
Max Reitz7d8a9f72015-10-26 21:39:08 +01002386{
2387 BlockBackend *blk;
Kevin Wolfb33945c2016-09-20 13:38:43 +02002388 const char *device = qdev_id ?: blk_name;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002389 bool locked;
2390
Kevin Wolfb33945c2016-09-20 13:38:43 +02002391 blk = qmp_get_blk(blk_name, qdev_id, errp);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002392 if (!blk) {
John Snow3a3086b2016-05-18 17:53:40 -04002393 return -ENODEV;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002394 }
2395
2396 if (!blk_dev_has_removable_media(blk)) {
2397 error_setg(errp, "Device '%s' is not removable", device);
John Snow3a3086b2016-05-18 17:53:40 -04002398 return -ENOTSUP;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002399 }
2400
Max Reitz12c7ec82016-01-29 20:49:11 +01002401 if (!blk_dev_has_tray(blk)) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002402 error_setg(errp, "Device '%s' does not have a tray", device);
2403 return -ENOSYS;
Max Reitz12c7ec82016-01-29 20:49:11 +01002404 }
2405
Max Reitz7d8a9f72015-10-26 21:39:08 +01002406 if (blk_dev_is_tray_open(blk)) {
John Snow3a3086b2016-05-18 17:53:40 -04002407 return 0;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002408 }
2409
2410 locked = blk_dev_is_medium_locked(blk);
2411 if (locked) {
2412 blk_dev_eject_request(blk, force);
2413 }
2414
2415 if (!locked || force) {
Kevin Wolf39829a02017-01-24 14:21:41 +01002416 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002417 }
John Snow3a3086b2016-05-18 17:53:40 -04002418
2419 if (locked && !force) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002420 error_setg(errp, "Device '%s' is locked and force was not specified, "
2421 "wait for tray to open and try again", device);
2422 return -EINPROGRESS;
John Snow3a3086b2016-05-18 17:53:40 -04002423 }
2424
2425 return 0;
2426}
2427
Kevin Wolfb33945c2016-09-20 13:38:43 +02002428void qmp_blockdev_open_tray(bool has_device, const char *device,
2429 bool has_id, const char *id,
2430 bool has_force, bool force,
John Snow3a3086b2016-05-18 17:53:40 -04002431 Error **errp)
2432{
Colin Lordbf18bee2016-06-06 14:15:22 -04002433 Error *local_err = NULL;
2434 int rc;
2435
John Snow3a3086b2016-05-18 17:53:40 -04002436 if (!has_force) {
2437 force = false;
2438 }
Kevin Wolfb33945c2016-09-20 13:38:43 +02002439 rc = do_open_tray(has_device ? device : NULL,
2440 has_id ? id : NULL,
2441 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002442 if (rc && rc != -ENOSYS && rc != -EINPROGRESS) {
2443 error_propagate(errp, local_err);
2444 return;
2445 }
2446 error_free(local_err);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002447}
2448
Kevin Wolfb33945c2016-09-20 13:38:43 +02002449void qmp_blockdev_close_tray(bool has_device, const char *device,
2450 bool has_id, const char *id,
2451 Error **errp)
Max Reitzabaaf592015-10-26 21:39:09 +01002452{
2453 BlockBackend *blk;
Kevin Wolf39829a02017-01-24 14:21:41 +01002454 Error *local_err = NULL;
Max Reitzabaaf592015-10-26 21:39:09 +01002455
Kevin Wolfb33945c2016-09-20 13:38:43 +02002456 device = has_device ? device : NULL;
2457 id = has_id ? id : NULL;
2458
2459 blk = qmp_get_blk(device, id, errp);
Max Reitzabaaf592015-10-26 21:39:09 +01002460 if (!blk) {
Max Reitzabaaf592015-10-26 21:39:09 +01002461 return;
2462 }
2463
2464 if (!blk_dev_has_removable_media(blk)) {
Kevin Wolfb33945c2016-09-20 13:38:43 +02002465 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitzabaaf592015-10-26 21:39:09 +01002466 return;
2467 }
2468
Max Reitz12c7ec82016-01-29 20:49:11 +01002469 if (!blk_dev_has_tray(blk)) {
2470 /* Ignore this command on tray-less devices */
2471 return;
2472 }
2473
Max Reitzabaaf592015-10-26 21:39:09 +01002474 if (!blk_dev_is_tray_open(blk)) {
2475 return;
2476 }
2477
Kevin Wolf39829a02017-01-24 14:21:41 +01002478 blk_dev_change_media_cb(blk, true, &local_err);
2479 if (local_err) {
2480 error_propagate(errp, local_err);
2481 return;
2482 }
Max Reitzabaaf592015-10-26 21:39:09 +01002483}
2484
Max Reitz82fcf662017-11-10 23:43:01 +01002485static void blockdev_remove_medium(bool has_device, const char *device,
2486 bool has_id, const char *id, Error **errp)
Max Reitz2814f672015-10-26 21:39:10 +01002487{
2488 BlockBackend *blk;
2489 BlockDriverState *bs;
2490 AioContext *aio_context;
Kevin Wolf00949ba2016-09-20 13:38:45 +02002491 bool has_attached_device;
Max Reitz2814f672015-10-26 21:39:10 +01002492
Kevin Wolf00949ba2016-09-20 13:38:45 +02002493 device = has_device ? device : NULL;
2494 id = has_id ? id : NULL;
2495
2496 blk = qmp_get_blk(device, id, errp);
Max Reitz2814f672015-10-26 21:39:10 +01002497 if (!blk) {
Max Reitz2814f672015-10-26 21:39:10 +01002498 return;
2499 }
2500
2501 /* For BBs without a device, we can exchange the BDS tree at will */
Kevin Wolf00949ba2016-09-20 13:38:45 +02002502 has_attached_device = blk_get_attached_dev(blk);
Max Reitz2814f672015-10-26 21:39:10 +01002503
Kevin Wolf00949ba2016-09-20 13:38:45 +02002504 if (has_attached_device && !blk_dev_has_removable_media(blk)) {
2505 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002506 return;
2507 }
2508
Kevin Wolf00949ba2016-09-20 13:38:45 +02002509 if (has_attached_device && blk_dev_has_tray(blk) &&
2510 !blk_dev_is_tray_open(blk))
2511 {
2512 error_setg(errp, "Tray of device '%s' is not open", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002513 return;
2514 }
2515
2516 bs = blk_bs(blk);
2517 if (!bs) {
2518 return;
2519 }
2520
2521 aio_context = bdrv_get_aio_context(bs);
2522 aio_context_acquire(aio_context);
2523
2524 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2525 goto out;
2526 }
2527
Max Reitz2814f672015-10-26 21:39:10 +01002528 blk_remove_bs(blk);
2529
Max Reitz12c7ec82016-01-29 20:49:11 +01002530 if (!blk_dev_has_tray(blk)) {
2531 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2532 * called at all); therefore, the medium needs to be ejected here.
2533 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2534 * value passed here (i.e. false). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002535 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz12c7ec82016-01-29 20:49:11 +01002536 }
2537
Max Reitz2814f672015-10-26 21:39:10 +01002538out:
2539 aio_context_release(aio_context);
2540}
2541
Max Reitz34ce1112017-11-10 23:43:02 +01002542void qmp_blockdev_remove_medium(const char *id, Error **errp)
Max Reitz82fcf662017-11-10 23:43:01 +01002543{
2544 blockdev_remove_medium(false, NULL, true, id, errp);
2545}
2546
Kevin Wolf716df212016-09-20 13:38:44 +02002547static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
Max Reitzd1299882015-10-26 21:39:11 +01002548 BlockDriverState *bs, Error **errp)
2549{
Kevin Wolf39829a02017-01-24 14:21:41 +01002550 Error *local_err = NULL;
Max Reitzd1299882015-10-26 21:39:11 +01002551 bool has_device;
Kevin Wolfd7086422017-01-13 19:02:32 +01002552 int ret;
Max Reitzd1299882015-10-26 21:39:11 +01002553
Max Reitzd1299882015-10-26 21:39:11 +01002554 /* For BBs without a device, we can exchange the BDS tree at will */
2555 has_device = blk_get_attached_dev(blk);
2556
2557 if (has_device && !blk_dev_has_removable_media(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002558 error_setg(errp, "Device is not removable");
Max Reitzd1299882015-10-26 21:39:11 +01002559 return;
2560 }
2561
Max Reitz12c7ec82016-01-29 20:49:11 +01002562 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002563 error_setg(errp, "Tray of the device is not open");
Max Reitzd1299882015-10-26 21:39:11 +01002564 return;
2565 }
2566
2567 if (blk_bs(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002568 error_setg(errp, "There already is a medium in the device");
Max Reitzd1299882015-10-26 21:39:11 +01002569 return;
2570 }
2571
Kevin Wolfd7086422017-01-13 19:02:32 +01002572 ret = blk_insert_bs(blk, bs, errp);
2573 if (ret < 0) {
2574 return;
2575 }
Max Reitzd1299882015-10-26 21:39:11 +01002576
Max Reitz12c7ec82016-01-29 20:49:11 +01002577 if (!blk_dev_has_tray(blk)) {
2578 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2579 * called at all); therefore, the medium needs to be pushed into the
2580 * slot here.
2581 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2582 * value passed here (i.e. true). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002583 blk_dev_change_media_cb(blk, true, &local_err);
2584 if (local_err) {
2585 error_propagate(errp, local_err);
2586 blk_remove_bs(blk);
2587 return;
2588 }
Max Reitz12c7ec82016-01-29 20:49:11 +01002589 }
Max Reitzd1299882015-10-26 21:39:11 +01002590}
2591
Max Reitz82fcf662017-11-10 23:43:01 +01002592static void blockdev_insert_medium(bool has_device, const char *device,
2593 bool has_id, const char *id,
2594 const char *node_name, Error **errp)
Max Reitzd1299882015-10-26 21:39:11 +01002595{
Kevin Wolf716df212016-09-20 13:38:44 +02002596 BlockBackend *blk;
Max Reitzd1299882015-10-26 21:39:11 +01002597 BlockDriverState *bs;
2598
Kevin Wolf716df212016-09-20 13:38:44 +02002599 blk = qmp_get_blk(has_device ? device : NULL,
2600 has_id ? id : NULL,
2601 errp);
2602 if (!blk) {
2603 return;
2604 }
2605
Max Reitzd1299882015-10-26 21:39:11 +01002606 bs = bdrv_find_node(node_name);
2607 if (!bs) {
2608 error_setg(errp, "Node '%s' not found", node_name);
2609 return;
2610 }
2611
Kevin Wolf1f0c4612016-03-22 18:38:44 +01002612 if (bdrv_has_blk(bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02002613 error_setg(errp, "Node '%s' is already in use", node_name);
Max Reitzd1299882015-10-26 21:39:11 +01002614 return;
2615 }
2616
Kevin Wolf716df212016-09-20 13:38:44 +02002617 qmp_blockdev_insert_anon_medium(blk, bs, errp);
Max Reitzd1299882015-10-26 21:39:11 +01002618}
2619
Max Reitz34ce1112017-11-10 23:43:02 +01002620void qmp_blockdev_insert_medium(const char *id, const char *node_name,
2621 Error **errp)
Max Reitz82fcf662017-11-10 23:43:01 +01002622{
2623 blockdev_insert_medium(false, NULL, true, id, node_name, errp);
2624}
2625
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002626void qmp_blockdev_change_medium(bool has_device, const char *device,
2627 bool has_id, const char *id,
2628 const char *filename,
Max Reitz24fb4132015-11-06 16:27:06 +01002629 bool has_format, const char *format,
Max Reitz39ff43d2015-11-11 04:49:44 +01002630 bool has_read_only,
2631 BlockdevChangeReadOnlyMode read_only,
Max Reitz24fb4132015-11-06 16:27:06 +01002632 Error **errp)
Max Reitzde2c6c02015-10-26 21:39:13 +01002633{
2634 BlockBackend *blk;
2635 BlockDriverState *medium_bs = NULL;
Max Reitz5b363932016-05-17 16:41:31 +02002636 int bdrv_flags;
Kevin Wolfb85114f2016-09-12 19:08:31 +02002637 bool detect_zeroes;
Colin Lord38a53d52016-06-08 13:56:28 -04002638 int rc;
Max Reitzde2c6c02015-10-26 21:39:13 +01002639 QDict *options = NULL;
2640 Error *err = NULL;
2641
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002642 blk = qmp_get_blk(has_device ? device : NULL,
2643 has_id ? id : NULL,
2644 errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002645 if (!blk) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002646 goto fail;
2647 }
2648
2649 if (blk_bs(blk)) {
2650 blk_update_root_state(blk);
2651 }
2652
2653 bdrv_flags = blk_get_open_flags_from_root_state(blk);
Alyssa Milburn156abc22016-02-06 13:36:18 +00002654 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
Kevin Wolfe35bdc12018-10-05 18:57:40 +02002655 BDRV_O_PROTOCOL | BDRV_O_AUTO_RDONLY);
Max Reitzde2c6c02015-10-26 21:39:13 +01002656
Max Reitz39ff43d2015-11-11 04:49:44 +01002657 if (!has_read_only) {
2658 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2659 }
2660
2661 switch (read_only) {
2662 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2663 break;
2664
2665 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2666 bdrv_flags &= ~BDRV_O_RDWR;
2667 break;
2668
2669 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2670 bdrv_flags |= BDRV_O_RDWR;
2671 break;
2672
2673 default:
2674 abort();
2675 }
2676
Kevin Wolfb85114f2016-09-12 19:08:31 +02002677 options = qdict_new();
2678 detect_zeroes = blk_get_detect_zeroes_from_root_state(blk);
Eric Blake46f5ac22017-04-27 16:58:17 -05002679 qdict_put_str(options, "detect-zeroes", detect_zeroes ? "on" : "off");
Kevin Wolfb85114f2016-09-12 19:08:31 +02002680
Max Reitz24fb4132015-11-06 16:27:06 +01002681 if (has_format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05002682 qdict_put_str(options, "driver", format);
Max Reitzde2c6c02015-10-26 21:39:13 +01002683 }
2684
Max Reitz5b363932016-05-17 16:41:31 +02002685 medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp);
2686 if (!medium_bs) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002687 goto fail;
2688 }
2689
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002690 rc = do_open_tray(has_device ? device : NULL,
2691 has_id ? id : NULL,
2692 false, &err);
Colin Lord38a53d52016-06-08 13:56:28 -04002693 if (rc && rc != -ENOSYS) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002694 error_propagate(errp, err);
2695 goto fail;
2696 }
Colin Lord38a53d52016-06-08 13:56:28 -04002697 error_free(err);
2698 err = NULL;
Max Reitzde2c6c02015-10-26 21:39:13 +01002699
Max Reitz82fcf662017-11-10 23:43:01 +01002700 blockdev_remove_medium(has_device, device, has_id, id, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002701 if (err) {
2702 error_propagate(errp, err);
2703 goto fail;
2704 }
2705
Kevin Wolf716df212016-09-20 13:38:44 +02002706 qmp_blockdev_insert_anon_medium(blk, medium_bs, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002707 if (err) {
2708 error_propagate(errp, err);
2709 goto fail;
2710 }
2711
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002712 qmp_blockdev_close_tray(has_device, device, has_id, id, errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002713
2714fail:
2715 /* If the medium has been inserted, the device has its own reference, so
2716 * ours must be relinquished; and if it has not been inserted successfully,
2717 * the reference must be relinquished anyway */
2718 bdrv_unref(medium_bs);
2719}
2720
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002721/* throttling disk I/O limits */
Eric Blake4dc93972016-07-13 21:50:21 -06002722void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002723{
Benoît Canetcc0681c2013-09-02 14:14:39 +02002724 ThrottleConfig cfg;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002725 BlockDriverState *bs;
Fam Zhenga0e85442015-03-02 19:36:48 +08002726 BlockBackend *blk;
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002727 AioContext *aio_context;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002728
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002729 blk = qmp_get_blk(arg->has_device ? arg->device : NULL,
2730 arg->has_id ? arg->id : NULL,
2731 errp);
Fam Zhenga0e85442015-03-02 19:36:48 +08002732 if (!blk) {
Luiz Capitulino80047da2011-12-14 16:49:14 -02002733 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002734 }
Max Reitz5433c242015-10-19 17:53:29 +02002735
2736 aio_context = blk_get_aio_context(blk);
2737 aio_context_acquire(aio_context);
2738
Fam Zhenga0e85442015-03-02 19:36:48 +08002739 bs = blk_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002740 if (!bs) {
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002741 error_setg(errp, "Device has no medium");
Max Reitz5433c242015-10-19 17:53:29 +02002742 goto out;
2743 }
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002744
Alberto Garcia1588ab52016-02-18 12:27:00 +02002745 throttle_config_init(&cfg);
Eric Blake4dc93972016-07-13 21:50:21 -06002746 cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps;
2747 cfg.buckets[THROTTLE_BPS_READ].avg = arg->bps_rd;
2748 cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002749
Eric Blake4dc93972016-07-13 21:50:21 -06002750 cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops;
2751 cfg.buckets[THROTTLE_OPS_READ].avg = arg->iops_rd;
2752 cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr;
Benoît Canetcc0681c2013-09-02 14:14:39 +02002753
Eric Blake4dc93972016-07-13 21:50:21 -06002754 if (arg->has_bps_max) {
2755 cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002756 }
Eric Blake4dc93972016-07-13 21:50:21 -06002757 if (arg->has_bps_rd_max) {
2758 cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002759 }
Eric Blake4dc93972016-07-13 21:50:21 -06002760 if (arg->has_bps_wr_max) {
2761 cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002762 }
Eric Blake4dc93972016-07-13 21:50:21 -06002763 if (arg->has_iops_max) {
2764 cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002765 }
Eric Blake4dc93972016-07-13 21:50:21 -06002766 if (arg->has_iops_rd_max) {
2767 cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002768 }
Eric Blake4dc93972016-07-13 21:50:21 -06002769 if (arg->has_iops_wr_max) {
2770 cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002771 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002772
Eric Blake4dc93972016-07-13 21:50:21 -06002773 if (arg->has_bps_max_length) {
2774 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002775 }
Eric Blake4dc93972016-07-13 21:50:21 -06002776 if (arg->has_bps_rd_max_length) {
2777 cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002778 }
Eric Blake4dc93972016-07-13 21:50:21 -06002779 if (arg->has_bps_wr_max_length) {
2780 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002781 }
Eric Blake4dc93972016-07-13 21:50:21 -06002782 if (arg->has_iops_max_length) {
2783 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002784 }
Eric Blake4dc93972016-07-13 21:50:21 -06002785 if (arg->has_iops_rd_max_length) {
2786 cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002787 }
Eric Blake4dc93972016-07-13 21:50:21 -06002788 if (arg->has_iops_wr_max_length) {
2789 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002790 }
2791
Eric Blake4dc93972016-07-13 21:50:21 -06002792 if (arg->has_iops_size) {
2793 cfg.op_size = arg->iops_size;
Benoît Canet2024c1d2013-09-02 14:14:41 +02002794 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002795
Alberto Garciad5851082016-02-18 12:26:59 +02002796 if (!throttle_is_valid(&cfg, errp)) {
Max Reitz5433c242015-10-19 17:53:29 +02002797 goto out;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002798 }
2799
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002800 if (throttle_enabled(&cfg)) {
2801 /* Enable I/O limits if they're not enabled yet, otherwise
2802 * just update the throttling group. */
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002803 if (!blk_get_public(blk)->throttle_group_member.throttle_state) {
Eric Blake4dc93972016-07-13 21:50:21 -06002804 blk_io_limits_enable(blk,
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002805 arg->has_group ? arg->group :
2806 arg->has_device ? arg->device :
2807 arg->id);
Eric Blake4dc93972016-07-13 21:50:21 -06002808 } else if (arg->has_group) {
2809 blk_io_limits_update_group(blk, arg->group);
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002810 }
2811 /* Set the new throttling configuration */
Kevin Wolf97148072016-03-21 13:53:52 +01002812 blk_set_io_limits(blk, &cfg);
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002813 } else if (blk_get_public(blk)->throttle_group_member.throttle_state) {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002814 /* If all throttling settings are set to 0, disable I/O limits */
Kevin Wolf97148072016-03-21 13:53:52 +01002815 blk_io_limits_disable(blk);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002816 }
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002817
Max Reitz5433c242015-10-19 17:53:29 +02002818out:
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002819 aio_context_release(aio_context);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002820}
2821
John Snow341ebc22015-04-17 19:49:52 -04002822void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2823 bool has_granularity, uint32_t granularity,
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002824 bool has_persistent, bool persistent,
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002825 bool has_autoload, bool autoload,
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002826 bool has_disabled, bool disabled,
John Snow341ebc22015-04-17 19:49:52 -04002827 Error **errp)
2828{
John Snow341ebc22015-04-17 19:49:52 -04002829 BlockDriverState *bs;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002830 BdrvDirtyBitmap *bitmap;
John Snow341ebc22015-04-17 19:49:52 -04002831
2832 if (!name || name[0] == '\0') {
2833 error_setg(errp, "Bitmap name cannot be empty");
2834 return;
2835 }
2836
2837 bs = bdrv_lookup_bs(node, node, errp);
2838 if (!bs) {
2839 return;
2840 }
2841
John Snow341ebc22015-04-17 19:49:52 -04002842 if (has_granularity) {
2843 if (granularity < 512 || !is_power_of_2(granularity)) {
2844 error_setg(errp, "Granularity must be power of 2 "
2845 "and at least 512");
Paolo Bonzini21198822017-06-05 14:39:03 +02002846 return;
John Snow341ebc22015-04-17 19:49:52 -04002847 }
2848 } else {
2849 /* Default to cluster size, if available: */
2850 granularity = bdrv_get_default_bitmap_granularity(bs);
2851 }
2852
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002853 if (!has_persistent) {
2854 persistent = false;
2855 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002856
Vladimir Sementsov-Ogievskiy3e99da52018-02-02 19:07:52 +03002857 if (has_autoload) {
2858 warn_report("Autoload option is deprecated and its value is ignored");
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002859 }
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002860
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002861 if (!has_disabled) {
2862 disabled = false;
2863 }
2864
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002865 if (persistent &&
2866 !bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp))
2867 {
2868 return;
2869 }
2870
2871 bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp);
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002872 if (bitmap == NULL) {
2873 return;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002874 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002875
Vladimir Sementsov-Ogievskiya6e2ca52018-06-11 14:53:32 -04002876 if (disabled) {
2877 bdrv_disable_dirty_bitmap(bitmap);
2878 }
2879
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002880 bdrv_dirty_bitmap_set_persistance(bitmap, persistent);
John Snow341ebc22015-04-17 19:49:52 -04002881}
2882
2883void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2884 Error **errp)
2885{
John Snow341ebc22015-04-17 19:49:52 -04002886 BlockDriverState *bs;
2887 BdrvDirtyBitmap *bitmap;
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002888 Error *local_err = NULL;
John Snow341ebc22015-04-17 19:49:52 -04002889
Paolo Bonzini21198822017-06-05 14:39:03 +02002890 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snow341ebc22015-04-17 19:49:52 -04002891 if (!bitmap || !bs) {
2892 return;
2893 }
2894
John Snow993edc02018-10-29 16:23:16 -04002895 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
John Snow9bd2b082015-04-17 19:49:57 -04002896 error_setg(errp,
John Snow993edc02018-10-29 16:23:16 -04002897 "Bitmap '%s' is currently in use by another operation and"
2898 " cannot be removed", name);
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04002899 return;
John Snow9bd2b082015-04-17 19:49:57 -04002900 }
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002901
2902 if (bdrv_dirty_bitmap_get_persistance(bitmap)) {
2903 bdrv_remove_persistent_dirty_bitmap(bs, name, &local_err);
2904 if (local_err != NULL) {
2905 error_propagate(errp, local_err);
2906 return;
2907 }
2908 }
2909
John Snow341ebc22015-04-17 19:49:52 -04002910 bdrv_release_dirty_bitmap(bs, bitmap);
John Snow341ebc22015-04-17 19:49:52 -04002911}
2912
John Snowe74e6b72015-04-17 19:49:59 -04002913/**
2914 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2915 * immediately after a full backup operation.
2916 */
2917void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2918 Error **errp)
2919{
John Snowe74e6b72015-04-17 19:49:59 -04002920 BdrvDirtyBitmap *bitmap;
2921 BlockDriverState *bs;
2922
Paolo Bonzini21198822017-06-05 14:39:03 +02002923 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snowe74e6b72015-04-17 19:49:59 -04002924 if (!bitmap || !bs) {
2925 return;
2926 }
2927
John Snow993edc02018-10-29 16:23:16 -04002928 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
John Snowe74e6b72015-04-17 19:49:59 -04002929 error_setg(errp,
John Snow993edc02018-10-29 16:23:16 -04002930 "Bitmap '%s' is currently in use by another operation"
2931 " and cannot be cleared", name);
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04002932 return;
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002933 } else if (bdrv_dirty_bitmap_readonly(bitmap)) {
2934 error_setg(errp, "Bitmap '%s' is readonly and cannot be cleared", name);
2935 return;
John Snowe74e6b72015-04-17 19:49:59 -04002936 }
2937
Fam Zhengdf9a6812015-11-09 18:16:54 +08002938 bdrv_clear_dirty_bitmap(bitmap, NULL);
John Snowe74e6b72015-04-17 19:49:59 -04002939}
2940
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002941void qmp_x_block_dirty_bitmap_enable(const char *node, const char *name,
2942 Error **errp)
2943{
2944 BlockDriverState *bs;
2945 BdrvDirtyBitmap *bitmap;
2946
2947 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
2948 if (!bitmap) {
2949 return;
2950 }
2951
John Snowb053bb52018-10-29 16:23:16 -04002952 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002953 error_setg(errp,
John Snowb053bb52018-10-29 16:23:16 -04002954 "Bitmap '%s' is currently in use by another operation"
2955 " and cannot be enabled", name);
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002956 return;
2957 }
2958
2959 bdrv_enable_dirty_bitmap(bitmap);
2960}
2961
2962void qmp_x_block_dirty_bitmap_disable(const char *node, const char *name,
2963 Error **errp)
2964{
2965 BlockDriverState *bs;
2966 BdrvDirtyBitmap *bitmap;
2967
2968 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
2969 if (!bitmap) {
2970 return;
2971 }
2972
John Snowb053bb52018-10-29 16:23:16 -04002973 if (bdrv_dirty_bitmap_user_locked(bitmap)) {
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002974 error_setg(errp,
John Snowb053bb52018-10-29 16:23:16 -04002975 "Bitmap '%s' is currently in use by another operation"
2976 " and cannot be disabled", name);
Vladimir Sementsov-Ogievskiy5c5d2e52018-06-11 14:53:32 -04002977 return;
2978 }
2979
2980 bdrv_disable_dirty_bitmap(bitmap);
2981}
2982
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002983void qmp_x_block_dirty_bitmap_merge(const char *node, const char *dst_name,
2984 const char *src_name, Error **errp)
2985{
2986 BlockDriverState *bs;
2987 BdrvDirtyBitmap *dst, *src;
2988
2989 dst = block_dirty_bitmap_lookup(node, dst_name, &bs, errp);
2990 if (!dst) {
2991 return;
2992 }
2993
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04002994 src = bdrv_find_dirty_bitmap(bs, src_name);
2995 if (!src) {
2996 error_setg(errp, "Dirty bitmap '%s' not found", src_name);
2997 return;
2998 }
2999
Vladimir Sementsov-Ogievskiyfa000f22018-10-29 16:23:15 -04003000 bdrv_merge_dirty_bitmap(dst, src, NULL, errp);
Vladimir Sementsov-Ogievskiyb598e532018-06-11 14:53:32 -04003001}
3002
Vladimir Sementsov-Ogievskiya3b52532017-06-28 15:05:25 +03003003BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
3004 const char *name,
3005 Error **errp)
3006{
3007 BdrvDirtyBitmap *bitmap;
3008 BlockDriverState *bs;
3009 BlockDirtyBitmapSha256 *ret = NULL;
3010 char *sha256;
3011
3012 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
3013 if (!bitmap || !bs) {
3014 return NULL;
3015 }
3016
3017 sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp);
3018 if (sha256 == NULL) {
3019 return NULL;
3020 }
3021
3022 ret = g_new(BlockDirtyBitmapSha256, 1);
3023 ret->sha256 = sha256;
3024
3025 return ret;
3026}
3027
Markus Armbruster072ebe62015-03-05 17:00:56 +01003028void hmp_drive_del(Monitor *mon, const QDict *qdict)
Ryan Harper9063f812010-11-12 11:07:13 -06003029{
3030 const char *id = qdict_get_str(qdict, "id");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02003031 BlockBackend *blk;
Ryan Harper9063f812010-11-12 11:07:13 -06003032 BlockDriverState *bs;
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003033 AioContext *aio_context;
Fam Zheng3718d8a2014-05-23 21:29:43 +08003034 Error *local_err = NULL;
Ryan Harper9063f812010-11-12 11:07:13 -06003035
Kevin Wolf2073d412016-02-23 17:50:37 +01003036 bs = bdrv_find_node(id);
3037 if (bs) {
Markus Armbruster79b7a772017-03-21 17:53:28 +01003038 qmp_blockdev_del(id, &local_err);
Kevin Wolf2073d412016-02-23 17:50:37 +01003039 if (local_err) {
3040 error_report_err(local_err);
3041 }
3042 return;
3043 }
3044
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02003045 blk = blk_by_name(id);
3046 if (!blk) {
Markus Armbrusterb1422f22014-05-16 11:00:09 +02003047 error_report("Device '%s' not found", id);
Markus Armbruster072ebe62015-03-05 17:00:56 +01003048 return;
Ryan Harper9063f812010-11-12 11:07:13 -06003049 }
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003050
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02003051 if (!blk_legacy_dinfo(blk)) {
Markus Armbruster48f364d2014-09-11 16:45:39 +02003052 error_report("Deleting device added with blockdev-add"
3053 " is not supported");
Markus Armbruster072ebe62015-03-05 17:00:56 +01003054 return;
Markus Armbruster48f364d2014-09-11 16:45:39 +02003055 }
3056
Max Reitz5433c242015-10-19 17:53:29 +02003057 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003058 aio_context_acquire(aio_context);
3059
Max Reitz5433c242015-10-19 17:53:29 +02003060 bs = blk_bs(blk);
3061 if (bs) {
3062 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
3063 error_report_err(local_err);
3064 aio_context_release(aio_context);
3065 return;
3066 }
Ryan Harper9063f812010-11-12 11:07:13 -06003067
Max Reitz938abd42016-01-29 16:36:09 +01003068 blk_remove_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02003069 }
Ryan Harper9063f812010-11-12 11:07:13 -06003070
Max Reitz7c735872016-03-16 19:54:39 +01003071 /* Make the BlockBackend and the attached BlockDriverState anonymous */
Max Reitzefaa7c42016-03-16 19:54:38 +01003072 monitor_remove_blk(blk);
3073
Max Reitz7c735872016-03-16 19:54:39 +01003074 /* If this BlockBackend has a device attached to it, its refcount will be
3075 * decremented when the device is removed; otherwise we have to do so here.
Ryan Harperd22b2f42011-03-29 20:51:47 -05003076 */
Markus Armbrustera7f53e22014-10-07 13:59:25 +02003077 if (blk_get_attached_dev(blk)) {
Stefan Hajnoczi293c51a2013-06-05 10:33:14 +02003078 /* Further I/O must not pause the guest */
Max Reitz373340b2015-10-19 17:53:22 +02003079 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
3080 BLOCKDEV_ON_ERROR_REPORT);
Ryan Harperd22b2f42011-03-29 20:51:47 -05003081 } else {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +02003082 blk_unref(blk);
Ryan Harper9063f812010-11-12 11:07:13 -06003083 }
3084
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003085 aio_context_release(aio_context);
Ryan Harper9063f812010-11-12 11:07:13 -06003086}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003087
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003088void qmp_block_resize(bool has_device, const char *device,
3089 bool has_node_name, const char *node_name,
3090 int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003091{
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003092 Error *local_err = NULL;
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003093 BlockBackend *blk = NULL;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003094 BlockDriverState *bs;
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003095 AioContext *aio_context;
Kevin Wolf87329012013-05-02 15:32:55 +02003096 int ret;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003097
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003098 bs = bdrv_lookup_bs(has_device ? device : NULL,
3099 has_node_name ? node_name : NULL,
3100 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003101 if (local_err) {
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003102 error_propagate(errp, local_err);
3103 return;
3104 }
3105
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003106 aio_context = bdrv_get_aio_context(bs);
3107 aio_context_acquire(aio_context);
3108
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003109 if (!bdrv_is_first_non_filter(bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003110 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003111 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003112 }
3113
3114 if (size < 0) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003115 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003116 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003117 }
3118
Jeff Cody9c75e162014-06-25 16:55:30 -04003119 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003120 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003121 goto out;
Jeff Cody9c75e162014-06-25 16:55:30 -04003122 }
3123
Kevin Wolf6d0eb642017-01-20 17:07:26 +01003124 blk = blk_new(BLK_PERM_RESIZE, BLK_PERM_ALL);
Kevin Wolfd7086422017-01-13 19:02:32 +01003125 ret = blk_insert_bs(blk, bs, errp);
3126 if (ret < 0) {
3127 goto out;
3128 }
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003129
John Snow698bdfa2017-05-10 13:39:45 -04003130 bdrv_drained_begin(bs);
Max Reitz3a691c52017-06-13 22:20:54 +02003131 ret = blk_truncate(blk, size, PREALLOC_MODE_OFF, errp);
John Snow698bdfa2017-05-10 13:39:45 -04003132 bdrv_drained_end(bs);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003133
3134out:
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003135 blk_unref(blk);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003136 aio_context_release(aio_context);
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003137}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003138
Alberto Garcia23233222016-07-05 17:28:59 +03003139void qmp_block_stream(bool has_job_id, const char *job_id, const char *device,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003140 bool has_base, const char *base,
Alberto Garcia312fe092016-10-28 10:08:19 +03003141 bool has_base_node, const char *base_node,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003142 bool has_backing_file, const char *backing_file,
3143 bool has_speed, int64_t speed,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003144 bool has_on_error, BlockdevOnError on_error,
John Snow241ca1a2018-09-06 09:02:23 -04003145 bool has_auto_finalize, bool auto_finalize,
3146 bool has_auto_dismiss, bool auto_dismiss,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003147 Error **errp)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003148{
Alberto Garcia554b6142016-10-28 10:08:11 +03003149 BlockDriverState *bs, *iter;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003150 BlockDriverState *base_bs = NULL;
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003151 AioContext *aio_context;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003152 Error *local_err = NULL;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003153 const char *base_name = NULL;
John Snowcf6320d2018-09-06 09:02:12 -04003154 int job_flags = JOB_DEFAULT;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003155
Paolo Bonzini1d809092012-09-28 17:22:59 +02003156 if (!has_on_error) {
3157 on_error = BLOCKDEV_ON_ERROR_REPORT;
3158 }
3159
Alberto Garcia554b6142016-10-28 10:08:11 +03003160 bs = bdrv_lookup_bs(device, device, errp);
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003161 if (!bs) {
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003162 return;
3163 }
3164
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003165 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003166 aio_context_acquire(aio_context);
3167
Alberto Garcia312fe092016-10-28 10:08:19 +03003168 if (has_base && has_base_node) {
3169 error_setg(errp, "'base' and 'base-node' cannot be specified "
3170 "at the same time");
3171 goto out;
3172 }
3173
Jeff Cody13d8cc52014-06-25 15:40:11 -04003174 if (has_base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003175 base_bs = bdrv_find_backing_image(bs, base);
3176 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003177 error_setg(errp, QERR_BASE_NOT_FOUND, base);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003178 goto out;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003179 }
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003180 assert(bdrv_get_aio_context(base_bs) == aio_context);
Jeff Cody13d8cc52014-06-25 15:40:11 -04003181 base_name = base;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003182 }
3183
Alberto Garcia312fe092016-10-28 10:08:19 +03003184 if (has_base_node) {
3185 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
3186 if (!base_bs) {
3187 goto out;
3188 }
3189 if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) {
3190 error_setg(errp, "Node '%s' is not a backing image of '%s'",
3191 base_node, device);
3192 goto out;
3193 }
3194 assert(bdrv_get_aio_context(base_bs) == aio_context);
3195 base_name = base_bs->filename;
3196 }
3197
Alberto Garcia554b6142016-10-28 10:08:11 +03003198 /* Check for op blockers in the whole chain between bs and base */
3199 for (iter = bs; iter && iter != base_bs; iter = backing_bs(iter)) {
3200 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
3201 goto out;
3202 }
3203 }
3204
Jeff Cody13d8cc52014-06-25 15:40:11 -04003205 /* if we are streaming the entire chain, the result will have no backing
3206 * file, and specifying one is therefore an error */
3207 if (base_bs == NULL && has_backing_file) {
3208 error_setg(errp, "backing file specified, but streaming the "
3209 "entire chain");
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003210 goto out;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003211 }
3212
3213 /* backing_file string overrides base bs filename */
3214 base_name = has_backing_file ? backing_file : base_name;
3215
John Snow241ca1a2018-09-06 09:02:23 -04003216 if (has_auto_finalize && !auto_finalize) {
3217 job_flags |= JOB_MANUAL_FINALIZE;
3218 }
3219 if (has_auto_dismiss && !auto_dismiss) {
3220 job_flags |= JOB_MANUAL_DISMISS;
3221 }
3222
Alberto Garcia23233222016-07-05 17:28:59 +03003223 stream_start(has_job_id ? job_id : NULL, bs, base_bs, base_name,
John Snowcf6320d2018-09-06 09:02:12 -04003224 job_flags, has_speed ? speed : 0, on_error, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003225 if (local_err) {
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003226 error_propagate(errp, local_err);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003227 goto out;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003228 }
3229
3230 trace_qmp_block_stream(bs, bs->job);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003231
3232out:
3233 aio_context_release(aio_context);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003234}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003235
Alberto Garciafd62c602016-07-05 17:29:00 +03003236void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
Kevin Wolf3c605f42017-06-27 17:18:20 +02003237 bool has_base_node, const char *base_node,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003238 bool has_base, const char *base,
Kevin Wolf3c605f42017-06-27 17:18:20 +02003239 bool has_top_node, const char *top_node,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003240 bool has_top, const char *top,
Jeff Cody54e26902014-06-25 15:40:10 -04003241 bool has_backing_file, const char *backing_file,
Jeff Codyed61fc12012-09-27 13:29:16 -04003242 bool has_speed, int64_t speed,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003243 bool has_filter_node_name, const char *filter_node_name,
John Snow96fbf532018-09-06 09:02:21 -04003244 bool has_auto_finalize, bool auto_finalize,
3245 bool has_auto_dismiss, bool auto_dismiss,
Jeff Codyed61fc12012-09-27 13:29:16 -04003246 Error **errp)
3247{
3248 BlockDriverState *bs;
Alberto Garcia058223a2016-10-28 10:08:07 +03003249 BlockDriverState *iter;
Jeff Codyed61fc12012-09-27 13:29:16 -04003250 BlockDriverState *base_bs, *top_bs;
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003251 AioContext *aio_context;
Jeff Codyed61fc12012-09-27 13:29:16 -04003252 Error *local_err = NULL;
3253 /* This will be part of the QMP command, if/when the
3254 * BlockdevOnError change for blkmirror makes it in
3255 */
Paolo Bonzini92aa5c62012-09-28 17:22:55 +02003256 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
John Snow53607822018-09-06 09:02:10 -04003257 int job_flags = JOB_DEFAULT;
Jeff Codyed61fc12012-09-27 13:29:16 -04003258
Max Reitz54504662014-04-10 19:36:25 +02003259 if (!has_speed) {
3260 speed = 0;
3261 }
Kevin Wolf0db832f2017-02-20 18:10:05 +01003262 if (!has_filter_node_name) {
3263 filter_node_name = NULL;
3264 }
John Snow96fbf532018-09-06 09:02:21 -04003265 if (has_auto_finalize && !auto_finalize) {
3266 job_flags |= JOB_MANUAL_FINALIZE;
3267 }
3268 if (has_auto_dismiss && !auto_dismiss) {
3269 job_flags |= JOB_MANUAL_DISMISS;
3270 }
Max Reitz54504662014-04-10 19:36:25 +02003271
Jeff Cody7676e2c2014-06-30 15:14:15 +02003272 /* Important Note:
3273 * libvirt relies on the DeviceNotFound error class in order to probe for
3274 * live commit feature versions; for this to work, we must make sure to
3275 * perform the device lookup before any generic errors that may occur in a
3276 * scenario in which all optional arguments are omitted. */
Kevin Wolf1d13b162016-06-23 14:20:24 +02003277 bs = qmp_get_root_bs(device, &local_err);
3278 if (!bs) {
3279 bs = bdrv_lookup_bs(device, device, NULL);
3280 if (!bs) {
3281 error_free(local_err);
3282 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3283 "Device '%s' not found", device);
3284 } else {
3285 error_propagate(errp, local_err);
3286 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003287 return;
3288 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003289
Kevin Wolf1d13b162016-06-23 14:20:24 +02003290 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003291 aio_context_acquire(aio_context);
3292
Fam Zhengbb000212014-09-11 13:14:00 +08003293 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003294 goto out;
Fam Zheng628ff682014-05-23 21:29:44 +08003295 }
3296
Jeff Codyed61fc12012-09-27 13:29:16 -04003297 /* default top_bs is the active layer */
3298 top_bs = bs;
3299
Kevin Wolf3c605f42017-06-27 17:18:20 +02003300 if (has_top_node && has_top) {
3301 error_setg(errp, "'top-node' and 'top' are mutually exclusive");
3302 goto out;
3303 } else if (has_top_node) {
3304 top_bs = bdrv_lookup_bs(NULL, top_node, errp);
3305 if (top_bs == NULL) {
3306 goto out;
3307 }
3308 if (!bdrv_chain_contains(bs, top_bs)) {
3309 error_setg(errp, "'%s' is not in this backing file chain",
3310 top_node);
3311 goto out;
3312 }
3313 } else if (has_top && top) {
Jeff Codyed61fc12012-09-27 13:29:16 -04003314 if (strcmp(bs->filename, top) != 0) {
3315 top_bs = bdrv_find_backing_image(bs, top);
3316 }
3317 }
3318
3319 if (top_bs == NULL) {
3320 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003321 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003322 }
3323
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003324 assert(bdrv_get_aio_context(top_bs) == aio_context);
3325
Kevin Wolf3c605f42017-06-27 17:18:20 +02003326 if (has_base_node && has_base) {
3327 error_setg(errp, "'base-node' and 'base' are mutually exclusive");
3328 goto out;
3329 } else if (has_base_node) {
3330 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
3331 if (base_bs == NULL) {
3332 goto out;
3333 }
3334 if (!bdrv_chain_contains(top_bs, base_bs)) {
3335 error_setg(errp, "'%s' is not in this backing file chain",
3336 base_node);
3337 goto out;
3338 }
3339 } else if (has_base && base) {
Jeff Codyd5208c42012-10-16 15:49:10 -04003340 base_bs = bdrv_find_backing_image(top_bs, base);
3341 } else {
3342 base_bs = bdrv_find_base(top_bs);
3343 }
3344
3345 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003346 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003347 goto out;
Jeff Codyd5208c42012-10-16 15:49:10 -04003348 }
3349
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003350 assert(bdrv_get_aio_context(base_bs) == aio_context);
3351
Alberto Garcia058223a2016-10-28 10:08:07 +03003352 for (iter = top_bs; iter != backing_bs(base_bs); iter = backing_bs(iter)) {
3353 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3354 goto out;
3355 }
Fam Zhengbb000212014-09-11 13:14:00 +08003356 }
3357
Jeff Cody7676e2c2014-06-30 15:14:15 +02003358 /* Do not allow attempts to commit an image into itself */
3359 if (top_bs == base_bs) {
3360 error_setg(errp, "cannot commit an image into itself");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003361 goto out;
Jeff Cody7676e2c2014-06-30 15:14:15 +02003362 }
3363
Fam Zheng20a63d22013-12-16 14:45:31 +08003364 if (top_bs == bs) {
Jeff Cody54e26902014-06-25 15:40:10 -04003365 if (has_backing_file) {
3366 error_setg(errp, "'backing-file' specified,"
3367 " but 'top' is the active layer");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003368 goto out;
Jeff Cody54e26902014-06-25 15:40:10 -04003369 }
John Snow47970df2016-10-27 12:06:57 -04003370 commit_active_start(has_job_id ? job_id : NULL, bs, base_bs,
John Snow53607822018-09-06 09:02:10 -04003371 job_flags, speed, on_error,
Fam Zheng78bbd912017-04-21 20:27:04 +08003372 filter_node_name, NULL, NULL, false, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003373 } else {
Alberto Garcia058223a2016-10-28 10:08:07 +03003374 BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
3375 if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3376 goto out;
3377 }
John Snow53607822018-09-06 09:02:10 -04003378 commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, job_flags,
3379 speed, on_error, has_backing_file ? backing_file : NULL,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003380 filter_node_name, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003381 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003382 if (local_err != NULL) {
3383 error_propagate(errp, local_err);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003384 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003385 }
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003386
3387out:
3388 aio_context_release(aio_context);
Jeff Codyed61fc12012-09-27 13:29:16 -04003389}
3390
Kevin Wolf62c9e412018-04-19 16:09:52 +02003391static BlockJob *do_drive_backup(DriveBackup *backup, JobTxn *txn,
John Snow111049a2016-11-08 01:50:38 -05003392 Error **errp)
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003393{
3394 BlockDriverState *bs;
3395 BlockDriverState *target_bs;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003396 BlockDriverState *source = NULL;
John Snow111049a2016-11-08 01:50:38 -05003397 BlockJob *job = NULL;
John Snowd58d8452015-04-17 19:49:58 -04003398 BdrvDirtyBitmap *bmap = NULL;
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003399 AioContext *aio_context;
Max Reitze6641712015-08-26 19:47:48 +02003400 QDict *options = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003401 Error *local_err = NULL;
Kevin Wolfbb02b652018-04-19 17:54:56 +02003402 int flags, job_flags = JOB_DEFAULT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003403 int64_t size;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003404 bool set_backing_hd = false;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003405
Pavel Butsykin81206a82016-07-22 11:17:50 +03003406 if (!backup->has_speed) {
3407 backup->speed = 0;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003408 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003409 if (!backup->has_on_source_error) {
3410 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003411 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003412 if (!backup->has_on_target_error) {
3413 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003414 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003415 if (!backup->has_mode) {
3416 backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3417 }
3418 if (!backup->has_job_id) {
3419 backup->job_id = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003420 }
John Snowb40dacd2018-03-10 03:27:44 -05003421 if (!backup->has_auto_finalize) {
3422 backup->auto_finalize = true;
3423 }
3424 if (!backup->has_auto_dismiss) {
3425 backup->auto_dismiss = true;
3426 }
Pavel Butsykin13b94142016-07-22 11:17:52 +03003427 if (!backup->has_compress) {
3428 backup->compress = false;
3429 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003430
Pavel Butsykin81206a82016-07-22 11:17:50 +03003431 bs = qmp_get_root_bs(backup->device, errp);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003432 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003433 return NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003434 }
3435
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003436 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003437 aio_context_acquire(aio_context);
3438
Pavel Butsykin81206a82016-07-22 11:17:50 +03003439 if (!backup->has_format) {
3440 backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ?
3441 NULL : (char*) bs->drv->format_name;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003442 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003443
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003444 /* Early check to avoid creating target */
Fam Zheng3718d8a2014-05-23 21:29:43 +08003445 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003446 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003447 }
3448
Kevin Wolf61de4c62016-03-18 17:46:45 +01003449 flags = bs->open_flags | BDRV_O_RDWR;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003450
Ian Mainfc5d3f82013-07-26 11:39:04 -07003451 /* See if we have a backing HD we can use to create our new image
3452 * on top of. */
Pavel Butsykin81206a82016-07-22 11:17:50 +03003453 if (backup->sync == MIRROR_SYNC_MODE_TOP) {
Kevin Wolf760e0062015-06-17 14:55:21 +02003454 source = backing_bs(bs);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003455 if (!source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003456 backup->sync = MIRROR_SYNC_MODE_FULL;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003457 }
3458 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003459 if (backup->sync == MIRROR_SYNC_MODE_NONE) {
Ian Mainfc5d3f82013-07-26 11:39:04 -07003460 source = bs;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003461 flags |= BDRV_O_NO_BACKING;
3462 set_backing_hd = true;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003463 }
3464
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003465 size = bdrv_getlength(bs);
3466 if (size < 0) {
3467 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003468 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003469 }
3470
Pavel Butsykin81206a82016-07-22 11:17:50 +03003471 if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
3472 assert(backup->format);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003473 if (source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003474 bdrv_img_create(backup->target, backup->format, source->filename,
Ian Mainfc5d3f82013-07-26 11:39:04 -07003475 source->drv->format_name, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003476 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003477 } else {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003478 bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003479 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003480 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003481 }
3482
Markus Armbruster84d18f02014-01-30 15:07:28 +01003483 if (local_err) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003484 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003485 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003486 }
3487
Pavel Butsykin81206a82016-07-22 11:17:50 +03003488 if (backup->format) {
Fam Zhengfc0932f2017-05-03 00:35:53 +08003489 if (!options) {
3490 options = qdict_new();
3491 }
Eric Blake46f5ac22017-04-27 16:58:17 -05003492 qdict_put_str(options, "driver", backup->format);
Max Reitze6641712015-08-26 19:47:48 +02003493 }
3494
Pavel Butsykin81206a82016-07-22 11:17:50 +03003495 target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003496 if (!target_bs) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003497 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003498 }
3499
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003500 bdrv_set_aio_context(target_bs, aio_context);
3501
Fam Zhengfc0932f2017-05-03 00:35:53 +08003502 if (set_backing_hd) {
3503 bdrv_set_backing_hd(target_bs, source, &local_err);
3504 if (local_err) {
3505 bdrv_unref(target_bs);
3506 goto out;
3507 }
3508 }
3509
Pavel Butsykin81206a82016-07-22 11:17:50 +03003510 if (backup->has_bitmap) {
3511 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
John Snowd58d8452015-04-17 19:49:58 -04003512 if (!bmap) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003513 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
Max Reitz0702d3d2015-11-09 23:39:10 +01003514 bdrv_unref(target_bs);
John Snowd58d8452015-04-17 19:49:58 -04003515 goto out;
3516 }
John Snowb27a6b82018-10-29 16:23:16 -04003517 if (bdrv_dirty_bitmap_user_locked(bmap)) {
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04003518 error_setg(errp,
John Snowb27a6b82018-10-29 16:23:16 -04003519 "Bitmap '%s' is currently in use by another operation"
3520 " and cannot be used for backup", backup->bitmap);
Vladimir Sementsov-Ogievskiy4f43e952018-03-13 15:34:00 -04003521 goto out;
3522 }
John Snowd58d8452015-04-17 19:49:58 -04003523 }
John Snowb40dacd2018-03-10 03:27:44 -05003524 if (!backup->auto_finalize) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003525 job_flags |= JOB_MANUAL_FINALIZE;
John Snowb40dacd2018-03-10 03:27:44 -05003526 }
3527 if (!backup->auto_dismiss) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003528 job_flags |= JOB_MANUAL_DISMISS;
John Snowb40dacd2018-03-10 03:27:44 -05003529 }
John Snowd58d8452015-04-17 19:49:58 -04003530
John Snow111049a2016-11-08 01:50:38 -05003531 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
3532 backup->sync, bmap, backup->compress,
3533 backup->on_source_error, backup->on_target_error,
John Snowb40dacd2018-03-10 03:27:44 -05003534 job_flags, NULL, NULL, txn, &local_err);
Kevin Wolf5c438bc2016-04-14 13:09:53 +02003535 bdrv_unref(target_bs);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003536 if (local_err != NULL) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003537 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003538 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003539 }
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003540
3541out:
3542 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003543 return job;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003544}
3545
Pavel Butsykin81206a82016-07-22 11:17:50 +03003546void qmp_drive_backup(DriveBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003547{
John Snow111049a2016-11-08 01:50:38 -05003548
3549 BlockJob *job;
3550 job = do_drive_backup(arg, NULL, errp);
3551 if (job) {
Kevin Wolfda01ff72018-04-13 17:31:02 +02003552 job_start(&job->job);
John Snow111049a2016-11-08 01:50:38 -05003553 }
John Snow78f51fd2015-11-05 18:13:17 -05003554}
3555
Benoît Canetc13163f2014-01-23 21:31:34 +01003556BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3557{
Alberto Garciad5a8ee62015-04-17 14:52:43 +03003558 return bdrv_named_nodes_list(errp);
Benoît Canetc13163f2014-01-23 21:31:34 +01003559}
3560
Kevin Wolf62c9e412018-04-19 16:09:52 +02003561BlockJob *do_blockdev_backup(BlockdevBackup *backup, JobTxn *txn,
John Snow111049a2016-11-08 01:50:38 -05003562 Error **errp)
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003563{
3564 BlockDriverState *bs;
3565 BlockDriverState *target_bs;
3566 Error *local_err = NULL;
John Snow945c1ee2018-10-29 16:23:14 -04003567 BdrvDirtyBitmap *bmap = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003568 AioContext *aio_context;
John Snow111049a2016-11-08 01:50:38 -05003569 BlockJob *job = NULL;
Kevin Wolfbb02b652018-04-19 17:54:56 +02003570 int job_flags = JOB_DEFAULT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003571
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003572 if (!backup->has_speed) {
3573 backup->speed = 0;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003574 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003575 if (!backup->has_on_source_error) {
3576 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003577 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003578 if (!backup->has_on_target_error) {
3579 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3580 }
3581 if (!backup->has_job_id) {
3582 backup->job_id = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003583 }
John Snowb40dacd2018-03-10 03:27:44 -05003584 if (!backup->has_auto_finalize) {
3585 backup->auto_finalize = true;
3586 }
3587 if (!backup->has_auto_dismiss) {
3588 backup->auto_dismiss = true;
3589 }
Pavel Butsykin3b7b1232016-07-22 11:17:53 +03003590 if (!backup->has_compress) {
3591 backup->compress = false;
3592 }
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003593
Vladimir Sementsov-Ogievskiy930fe172018-07-02 15:46:29 -04003594 bs = bdrv_lookup_bs(backup->device, backup->device, errp);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003595 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003596 return NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003597 }
3598
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003599 aio_context = bdrv_get_aio_context(bs);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003600 aio_context_acquire(aio_context);
3601
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003602 target_bs = bdrv_lookup_bs(backup->target, backup->target, errp);
Fam Zheng0d978912016-05-23 10:19:35 +08003603 if (!target_bs) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003604 goto out;
3605 }
Max Reitz5433c242015-10-19 17:53:29 +02003606
Fam Zhengefd75562016-05-23 10:19:36 +08003607 if (bdrv_get_aio_context(target_bs) != aio_context) {
3608 if (!bdrv_has_blk(target_bs)) {
3609 /* The target BDS is not attached, we can safely move it to another
3610 * AioContext. */
3611 bdrv_set_aio_context(target_bs, aio_context);
3612 } else {
3613 error_setg(errp, "Target is attached to a different thread from "
3614 "source.");
3615 goto out;
3616 }
3617 }
John Snow945c1ee2018-10-29 16:23:14 -04003618
3619 if (backup->has_bitmap) {
3620 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
3621 if (!bmap) {
3622 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
3623 goto out;
3624 }
John Snowb27a6b82018-10-29 16:23:16 -04003625 if (bdrv_dirty_bitmap_user_locked(bmap)) {
John Snow945c1ee2018-10-29 16:23:14 -04003626 error_setg(errp,
John Snowb27a6b82018-10-29 16:23:16 -04003627 "Bitmap '%s' is currently in use by another operation"
3628 " and cannot be used for backup", backup->bitmap);
John Snow945c1ee2018-10-29 16:23:14 -04003629 goto out;
3630 }
3631 }
3632
John Snowb40dacd2018-03-10 03:27:44 -05003633 if (!backup->auto_finalize) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003634 job_flags |= JOB_MANUAL_FINALIZE;
John Snowb40dacd2018-03-10 03:27:44 -05003635 }
3636 if (!backup->auto_dismiss) {
Kevin Wolfbb02b652018-04-19 17:54:56 +02003637 job_flags |= JOB_MANUAL_DISMISS;
John Snowb40dacd2018-03-10 03:27:44 -05003638 }
John Snow111049a2016-11-08 01:50:38 -05003639 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
John Snow945c1ee2018-10-29 16:23:14 -04003640 backup->sync, bmap, backup->compress,
John Snow111049a2016-11-08 01:50:38 -05003641 backup->on_source_error, backup->on_target_error,
John Snowb40dacd2018-03-10 03:27:44 -05003642 job_flags, NULL, NULL, txn, &local_err);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003643 if (local_err != NULL) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003644 error_propagate(errp, local_err);
3645 }
3646out:
3647 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003648 return job;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003649}
3650
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003651void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003652{
John Snow111049a2016-11-08 01:50:38 -05003653 BlockJob *job;
3654 job = do_blockdev_backup(arg, NULL, errp);
3655 if (job) {
Kevin Wolfda01ff72018-04-13 17:31:02 +02003656 job_start(&job->job);
John Snow111049a2016-11-08 01:50:38 -05003657 }
John Snow78f51fd2015-11-05 18:13:17 -05003658}
3659
Fam Zheng4193cdd2015-12-24 12:45:03 +08003660/* Parameter check and block job starting for drive mirroring.
3661 * Caller should hold @device and @target's aio context (must be the same).
3662 **/
Alberto Garcia71aa9862016-07-05 17:28:57 +03003663static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003664 BlockDriverState *target,
3665 bool has_replaces, const char *replaces,
3666 enum MirrorSyncMode sync,
Max Reitz274fcce2016-06-10 20:57:47 +02003667 BlockMirrorBackingMode backing_mode,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003668 bool has_speed, int64_t speed,
3669 bool has_granularity, uint32_t granularity,
3670 bool has_buf_size, int64_t buf_size,
3671 bool has_on_source_error,
3672 BlockdevOnError on_source_error,
3673 bool has_on_target_error,
3674 BlockdevOnError on_target_error,
3675 bool has_unmap, bool unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003676 bool has_filter_node_name,
3677 const char *filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003678 bool has_copy_mode, MirrorCopyMode copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003679 bool has_auto_finalize, bool auto_finalize,
3680 bool has_auto_dismiss, bool auto_dismiss,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003681 Error **errp)
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003682{
John Snowa1999b32018-09-06 09:02:11 -04003683 int job_flags = JOB_DEFAULT;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003684
3685 if (!has_speed) {
3686 speed = 0;
3687 }
Paolo Bonzinib952b552012-10-18 16:49:28 +02003688 if (!has_on_source_error) {
3689 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3690 }
3691 if (!has_on_target_error) {
3692 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3693 }
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003694 if (!has_granularity) {
3695 granularity = 0;
3696 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003697 if (!has_buf_size) {
Wen Congyang48ac0a42015-05-15 15:51:36 +08003698 buf_size = 0;
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003699 }
Fam Zheng0fc9f8e2015-06-08 13:56:08 +08003700 if (!has_unmap) {
3701 unmap = true;
3702 }
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003703 if (!has_filter_node_name) {
3704 filter_node_name = NULL;
3705 }
Max Reitz481deba2018-06-13 20:18:22 +02003706 if (!has_copy_mode) {
3707 copy_mode = MIRROR_COPY_MODE_BACKGROUND;
3708 }
John Snowa6b58ad2018-09-06 09:02:22 -04003709 if (has_auto_finalize && !auto_finalize) {
3710 job_flags |= JOB_MANUAL_FINALIZE;
3711 }
3712 if (has_auto_dismiss && !auto_dismiss) {
3713 job_flags |= JOB_MANUAL_DISMISS;
3714 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003715
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003716 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003717 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3718 "a value in range [512B, 64MB]");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003719 return;
3720 }
3721 if (granularity & (granularity - 1)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003722 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3723 "power of 2");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003724 return;
3725 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003726
Fam Zheng4193cdd2015-12-24 12:45:03 +08003727 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3728 return;
3729 }
Fam Zhenge40e5022015-12-24 12:45:04 +08003730 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3731 return;
3732 }
Fam Zheng4193cdd2015-12-24 12:45:03 +08003733
3734 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3735 sync = MIRROR_SYNC_MODE_FULL;
3736 }
3737
3738 /* pass the node name to replace to mirror start since it's loose coupling
3739 * and will allow to check whether the node still exist at mirror completion
3740 */
Alberto Garcia71aa9862016-07-05 17:28:57 +03003741 mirror_start(job_id, bs, target,
John Snowa1999b32018-09-06 09:02:11 -04003742 has_replaces ? replaces : NULL, job_flags,
Max Reitz274fcce2016-06-10 20:57:47 +02003743 speed, granularity, buf_size, sync, backing_mode,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003744 on_source_error, on_target_error, unmap, filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003745 copy_mode, errp);
Fam Zheng4193cdd2015-12-24 12:45:03 +08003746}
3747
Eric Blakefaecd402016-07-14 16:37:58 -06003748void qmp_drive_mirror(DriveMirror *arg, Error **errp)
Fam Zheng4193cdd2015-12-24 12:45:03 +08003749{
3750 BlockDriverState *bs;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003751 BlockDriverState *source, *target_bs;
3752 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003753 BlockMirrorBackingMode backing_mode;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003754 Error *local_err = NULL;
3755 QDict *options = NULL;
3756 int flags;
3757 int64_t size;
Eric Blakefaecd402016-07-14 16:37:58 -06003758 const char *format = arg->format;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003759
Kevin Wolf0524e932016-06-23 14:20:24 +02003760 bs = qmp_get_root_bs(arg->device, errp);
3761 if (!bs) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003762 return;
3763 }
3764
Paolo Bonzinicb2af912018-02-07 17:29:20 +01003765 /* Early check to avoid creating target */
3766 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3767 return;
3768 }
3769
Kevin Wolf0524e932016-06-23 14:20:24 +02003770 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003771 aio_context_acquire(aio_context);
3772
Eric Blakefaecd402016-07-14 16:37:58 -06003773 if (!arg->has_mode) {
3774 arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003775 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003776
Eric Blakefaecd402016-07-14 16:37:58 -06003777 if (!arg->has_format) {
3778 format = (arg->mode == NEW_IMAGE_MODE_EXISTING
3779 ? NULL : bs->drv->format_name);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003780 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003781
Kevin Wolf61de4c62016-03-18 17:46:45 +01003782 flags = bs->open_flags | BDRV_O_RDWR;
Kevin Wolf760e0062015-06-17 14:55:21 +02003783 source = backing_bs(bs);
Eric Blakefaecd402016-07-14 16:37:58 -06003784 if (!source && arg->sync == MIRROR_SYNC_MODE_TOP) {
3785 arg->sync = MIRROR_SYNC_MODE_FULL;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003786 }
Eric Blakefaecd402016-07-14 16:37:58 -06003787 if (arg->sync == MIRROR_SYNC_MODE_NONE) {
Max Reitz117e0c82013-11-25 20:28:55 +01003788 source = bs;
3789 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003790
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003791 size = bdrv_getlength(bs);
3792 if (size < 0) {
3793 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003794 goto out;
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003795 }
3796
Eric Blakefaecd402016-07-14 16:37:58 -06003797 if (arg->has_replaces) {
Benoît Canet09158f02014-06-27 18:25:25 +02003798 BlockDriverState *to_replace_bs;
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003799 AioContext *replace_aio_context;
3800 int64_t replace_size;
Benoît Canet09158f02014-06-27 18:25:25 +02003801
Eric Blakefaecd402016-07-14 16:37:58 -06003802 if (!arg->has_node_name) {
Benoît Canet09158f02014-06-27 18:25:25 +02003803 error_setg(errp, "a node-name must be provided when replacing a"
3804 " named node of the graph");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003805 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003806 }
3807
Eric Blakefaecd402016-07-14 16:37:58 -06003808 to_replace_bs = check_to_replace_node(bs, arg->replaces, &local_err);
Benoît Canet09158f02014-06-27 18:25:25 +02003809
3810 if (!to_replace_bs) {
3811 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003812 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003813 }
3814
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003815 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3816 aio_context_acquire(replace_aio_context);
3817 replace_size = bdrv_getlength(to_replace_bs);
3818 aio_context_release(replace_aio_context);
3819
3820 if (size != replace_size) {
Benoît Canet09158f02014-06-27 18:25:25 +02003821 error_setg(errp, "cannot replace image with a mirror image of "
3822 "different size");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003823 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003824 }
3825 }
3826
Eric Blakefaecd402016-07-14 16:37:58 -06003827 if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
Max Reitz274fcce2016-06-10 20:57:47 +02003828 backing_mode = MIRROR_SOURCE_BACKING_CHAIN;
3829 } else {
3830 backing_mode = MIRROR_OPEN_BACKING_CHAIN;
3831 }
3832
John Snow2a32c6e2017-07-17 20:34:21 -04003833 /* Don't open backing image in create() */
3834 flags |= BDRV_O_NO_BACKING;
3835
Eric Blakefaecd402016-07-14 16:37:58 -06003836 if ((arg->sync == MIRROR_SYNC_MODE_FULL || !source)
3837 && arg->mode != NEW_IMAGE_MODE_EXISTING)
Max Reitz14526862013-11-06 19:50:44 +01003838 {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003839 /* create new image w/o backing file */
Max Reitze6641712015-08-26 19:47:48 +02003840 assert(format);
Eric Blakefaecd402016-07-14 16:37:58 -06003841 bdrv_img_create(arg->target, format,
Fam Zheng92172832017-04-21 20:27:01 +08003842 NULL, NULL, NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003843 } else {
Eric Blakefaecd402016-07-14 16:37:58 -06003844 switch (arg->mode) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003845 case NEW_IMAGE_MODE_EXISTING:
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003846 break;
3847 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3848 /* create new image with backing file */
Eric Blakefaecd402016-07-14 16:37:58 -06003849 bdrv_img_create(arg->target, format,
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003850 source->filename,
3851 source->drv->format_name,
Fam Zheng92172832017-04-21 20:27:01 +08003852 NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003853 break;
3854 default:
3855 abort();
3856 }
3857 }
3858
Markus Armbruster84d18f02014-01-30 15:07:28 +01003859 if (local_err) {
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003860 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003861 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003862 }
3863
Max Reitze6641712015-08-26 19:47:48 +02003864 options = qdict_new();
Eric Blakefaecd402016-07-14 16:37:58 -06003865 if (arg->has_node_name) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003866 qdict_put_str(options, "node-name", arg->node_name);
Benoît Canet4c828dc2014-06-16 12:00:55 +02003867 }
Max Reitze6641712015-08-26 19:47:48 +02003868 if (format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003869 qdict_put_str(options, "driver", format);
Max Reitze6641712015-08-26 19:47:48 +02003870 }
Benoît Canet4c828dc2014-06-16 12:00:55 +02003871
Paolo Bonzinib812f672013-01-21 17:09:43 +01003872 /* Mirroring takes care of copy-on-write using the source's backing
3873 * file.
3874 */
John Snow2a32c6e2017-07-17 20:34:21 -04003875 target_bs = bdrv_open(arg->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003876 if (!target_bs) {
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003877 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003878 }
3879
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003880 bdrv_set_aio_context(target_bs, aio_context);
3881
Eric Blakefaecd402016-07-14 16:37:58 -06003882 blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs,
3883 arg->has_replaces, arg->replaces, arg->sync,
3884 backing_mode, arg->has_speed, arg->speed,
3885 arg->has_granularity, arg->granularity,
3886 arg->has_buf_size, arg->buf_size,
3887 arg->has_on_source_error, arg->on_source_error,
3888 arg->has_on_target_error, arg->on_target_error,
3889 arg->has_unmap, arg->unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003890 false, NULL,
Max Reitz481deba2018-06-13 20:18:22 +02003891 arg->has_copy_mode, arg->copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003892 arg->has_auto_finalize, arg->auto_finalize,
3893 arg->has_auto_dismiss, arg->auto_dismiss,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003894 &local_err);
Kevin Wolfe253f4b2016-04-12 16:17:41 +02003895 bdrv_unref(target_bs);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003896 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003897out:
3898 aio_context_release(aio_context);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003899}
3900
Alberto Garcia71aa9862016-07-05 17:28:57 +03003901void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
3902 const char *device, const char *target,
Fam Zhengdf925622015-12-24 12:45:05 +08003903 bool has_replaces, const char *replaces,
3904 MirrorSyncMode sync,
3905 bool has_speed, int64_t speed,
3906 bool has_granularity, uint32_t granularity,
3907 bool has_buf_size, int64_t buf_size,
3908 bool has_on_source_error,
3909 BlockdevOnError on_source_error,
3910 bool has_on_target_error,
3911 BlockdevOnError on_target_error,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003912 bool has_filter_node_name,
3913 const char *filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003914 bool has_copy_mode, MirrorCopyMode copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003915 bool has_auto_finalize, bool auto_finalize,
3916 bool has_auto_dismiss, bool auto_dismiss,
Fam Zhengdf925622015-12-24 12:45:05 +08003917 Error **errp)
3918{
3919 BlockDriverState *bs;
Fam Zhengdf925622015-12-24 12:45:05 +08003920 BlockDriverState *target_bs;
3921 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003922 BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN;
Fam Zhengdf925622015-12-24 12:45:05 +08003923 Error *local_err = NULL;
3924
Kevin Wolf07eec652016-06-23 14:20:24 +02003925 bs = qmp_get_root_bs(device, errp);
Fam Zhengdf925622015-12-24 12:45:05 +08003926 if (!bs) {
Fam Zhengdf925622015-12-24 12:45:05 +08003927 return;
3928 }
3929
3930 target_bs = bdrv_lookup_bs(target, target, errp);
3931 if (!target_bs) {
3932 return;
3933 }
3934
3935 aio_context = bdrv_get_aio_context(bs);
3936 aio_context_acquire(aio_context);
3937
Fam Zhengdf925622015-12-24 12:45:05 +08003938 bdrv_set_aio_context(target_bs, aio_context);
3939
Alberto Garcia71aa9862016-07-05 17:28:57 +03003940 blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs,
Max Reitz274fcce2016-06-10 20:57:47 +02003941 has_replaces, replaces, sync, backing_mode,
Fam Zhengdf925622015-12-24 12:45:05 +08003942 has_speed, speed,
3943 has_granularity, granularity,
3944 has_buf_size, buf_size,
3945 has_on_source_error, on_source_error,
3946 has_on_target_error, on_target_error,
3947 true, true,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003948 has_filter_node_name, filter_node_name,
Max Reitz481deba2018-06-13 20:18:22 +02003949 has_copy_mode, copy_mode,
John Snowa6b58ad2018-09-06 09:02:22 -04003950 has_auto_finalize, auto_finalize,
3951 has_auto_dismiss, auto_dismiss,
Fam Zhengdf925622015-12-24 12:45:05 +08003952 &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003953 error_propagate(errp, local_err);
Fam Zhengdf925622015-12-24 12:45:05 +08003954
3955 aio_context_release(aio_context);
3956}
3957
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003958/* Get a block job using its ID and acquire its AioContext */
3959static BlockJob *find_block_job(const char *id, AioContext **aio_context,
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003960 Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003961{
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003962 BlockJob *job;
3963
3964 assert(id != NULL);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003965
Max Reitz5433c242015-10-19 17:53:29 +02003966 *aio_context = NULL;
3967
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003968 job = block_job_get(id);
3969
3970 if (!job) {
3971 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
3972 "Block job '%s' not found", id);
3973 return NULL;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003974 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003975
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003976 *aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003977 aio_context_acquire(*aio_context);
3978
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003979 return job;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003980}
3981
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003982void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003983{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003984 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003985 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003986
3987 if (!job) {
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003988 return;
3989 }
3990
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003991 block_job_set_speed(job, speed, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003992 aio_context_release(aio_context);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003993}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003994
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003995void qmp_block_job_cancel(const char *device,
3996 bool has_force, bool force, Error **errp)
3997{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003998 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003999 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004000
4001 if (!job) {
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004002 return;
4003 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004004
4005 if (!has_force) {
4006 force = false;
4007 }
4008
Kevin Wolfb15de822018-04-18 17:10:26 +02004009 if (job_user_paused(&job->job) && !force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04004010 error_setg(errp, "The block job for device '%s' is currently paused",
4011 device);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004012 goto out;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004013 }
4014
4015 trace_qmp_block_job_cancel(job);
Kevin Wolf3d70ff52018-04-24 16:13:52 +02004016 job_user_cancel(&job->job, force, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004017out:
4018 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004019}
4020
4021void qmp_block_job_pause(const char *device, Error **errp)
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004022{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004023 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004024 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004025
John Snow0ec4dfb2018-03-10 03:27:32 -05004026 if (!job) {
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004027 return;
4028 }
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004029
4030 trace_qmp_block_job_pause(job);
Kevin Wolfb15de822018-04-18 17:10:26 +02004031 job_user_pause(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004032 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004033}
4034
4035void qmp_block_job_resume(const char *device, Error **errp)
4036{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004037 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004038 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004039
John Snow0ec4dfb2018-03-10 03:27:32 -05004040 if (!job) {
Paolo Bonzini8acc72a2012-09-28 17:22:50 +02004041 return;
4042 }
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004043
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02004044 trace_qmp_block_job_resume(job);
Kevin Wolfb15de822018-04-18 17:10:26 +02004045 job_user_resume(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004046 aio_context_release(aio_context);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00004047}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004048
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004049void qmp_block_job_complete(const char *device, Error **errp)
4050{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004051 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01004052 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004053
4054 if (!job) {
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004055 return;
4056 }
4057
4058 trace_qmp_block_job_complete(job);
Kevin Wolf3453d972018-04-23 12:24:16 +02004059 job_complete(&job->job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01004060 aio_context_release(aio_context);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02004061}
4062
John Snow11b61fb2018-03-10 03:27:43 -05004063void qmp_block_job_finalize(const char *id, Error **errp)
4064{
4065 AioContext *aio_context;
4066 BlockJob *job = find_block_job(id, &aio_context, errp);
4067
4068 if (!job) {
4069 return;
4070 }
4071
4072 trace_qmp_block_job_finalize(job);
Kevin Wolf7eaa8fb2018-04-23 16:06:26 +02004073 job_finalize(&job->job, errp);
John Snow11b61fb2018-03-10 03:27:43 -05004074 aio_context_release(aio_context);
4075}
4076
John Snow75f71052018-03-10 03:27:36 -05004077void qmp_block_job_dismiss(const char *id, Error **errp)
4078{
4079 AioContext *aio_context;
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004080 BlockJob *bjob = find_block_job(id, &aio_context, errp);
4081 Job *job;
John Snow75f71052018-03-10 03:27:36 -05004082
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004083 if (!bjob) {
John Snow75f71052018-03-10 03:27:36 -05004084 return;
4085 }
4086
Kevin Wolf5f9a6a02018-04-24 17:10:12 +02004087 trace_qmp_block_job_dismiss(bjob);
4088 job = &bjob->job;
4089 job_dismiss(&job, errp);
John Snow75f71052018-03-10 03:27:36 -05004090 aio_context_release(aio_context);
4091}
4092
Jeff Codyfa40e652014-07-01 09:52:16 +02004093void qmp_change_backing_file(const char *device,
4094 const char *image_node_name,
4095 const char *backing_file,
4096 Error **errp)
4097{
4098 BlockDriverState *bs = NULL;
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004099 AioContext *aio_context;
Jeff Codyfa40e652014-07-01 09:52:16 +02004100 BlockDriverState *image_bs = NULL;
4101 Error *local_err = NULL;
4102 bool ro;
4103 int open_flags;
4104 int ret;
4105
Kevin Wolf7b5dca32016-06-23 14:20:24 +02004106 bs = qmp_get_root_bs(device, errp);
4107 if (!bs) {
Jeff Codyfa40e652014-07-01 09:52:16 +02004108 return;
4109 }
4110
Kevin Wolf7b5dca32016-06-23 14:20:24 +02004111 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004112 aio_context_acquire(aio_context);
4113
Jeff Codyfa40e652014-07-01 09:52:16 +02004114 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
4115 if (local_err) {
4116 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004117 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004118 }
4119
4120 if (!image_bs) {
4121 error_setg(errp, "image file not found");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004122 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004123 }
4124
4125 if (bdrv_find_base(image_bs) == image_bs) {
4126 error_setg(errp, "not allowing backing file change on an image "
4127 "without a backing file");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004128 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004129 }
4130
4131 /* even though we are not necessarily operating on bs, we need it to
4132 * determine if block ops are currently prohibited on the chain */
4133 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004134 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004135 }
4136
4137 /* final sanity check */
4138 if (!bdrv_chain_contains(bs, image_bs)) {
4139 error_setg(errp, "'%s' and image file are not in the same chain",
4140 device);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004141 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004142 }
4143
4144 /* if not r/w, reopen to make r/w */
4145 open_flags = image_bs->open_flags;
4146 ro = bdrv_is_read_only(image_bs);
4147
4148 if (ro) {
4149 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
4150 if (local_err) {
4151 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004152 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02004153 }
4154 }
4155
4156 ret = bdrv_change_backing_file(image_bs, backing_file,
4157 image_bs->drv ? image_bs->drv->format_name : "");
4158
4159 if (ret < 0) {
4160 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
4161 backing_file);
4162 /* don't exit here, so we can try to restore open flags if
4163 * appropriate */
4164 }
4165
4166 if (ro) {
4167 bdrv_reopen(image_bs, open_flags, &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03004168 error_propagate(errp, local_err);
Jeff Codyfa40e652014-07-01 09:52:16 +02004169 }
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00004170
4171out:
4172 aio_context_release(aio_context);
Jeff Codyfa40e652014-07-01 09:52:16 +02004173}
4174
Kevin Wolfabb21ac2016-02-23 17:33:24 +01004175void hmp_drive_add_node(Monitor *mon, const char *optstr)
4176{
4177 QemuOpts *opts;
4178 QDict *qdict;
4179 Error *local_err = NULL;
4180
4181 opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
4182 if (!opts) {
4183 return;
4184 }
4185
4186 qdict = qemu_opts_to_qdict(opts, NULL);
4187
4188 if (!qdict_get_try_str(qdict, "node-name")) {
Marc-André Lureaucb3e7f02018-04-19 17:01:43 +02004189 qobject_unref(qdict);
Kevin Wolfabb21ac2016-02-23 17:33:24 +01004190 error_report("'node-name' needs to be specified");
4191 goto out;
4192 }
4193
4194 BlockDriverState *bs = bds_tree_init(qdict, &local_err);
4195 if (!bs) {
4196 error_report_err(local_err);
4197 goto out;
4198 }
4199
4200 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4201
4202out:
4203 qemu_opts_del(opts);
4204}
4205
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004206void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
4207{
Max Reitzbe4b67b2015-10-19 17:53:09 +02004208 BlockDriverState *bs;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004209 QObject *obj;
Daniel P. Berrange7d5e1992016-09-30 15:45:28 +01004210 Visitor *v = qobject_output_visitor_new(&obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004211 QDict *qdict;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004212 Error *local_err = NULL;
4213
Eric Blake3b098d52016-06-09 10:48:43 -06004214 visit_type_BlockdevOptions(v, NULL, &options, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01004215 if (local_err) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004216 error_propagate(errp, local_err);
4217 goto fail;
4218 }
4219
Eric Blake3b098d52016-06-09 10:48:43 -06004220 visit_complete(v, &obj);
Max Reitz7dc847e2018-02-24 16:40:29 +01004221 qdict = qobject_to(QDict, obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004222
4223 qdict_flatten(qdict);
4224
Kevin Wolf9ec88732016-09-21 14:56:11 +02004225 if (!qdict_get_try_str(qdict, "node-name")) {
4226 error_setg(errp, "'node-name' must be specified for the root node");
4227 goto fail;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004228 }
4229
Kevin Wolf9ec88732016-09-21 14:56:11 +02004230 bs = bds_tree_init(qdict, errp);
4231 if (!bs) {
4232 goto fail;
4233 }
4234
4235 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4236
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004237fail:
Eric Blake3b098d52016-06-09 10:48:43 -06004238 visit_free(v);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004239}
4240
Markus Armbruster79b7a772017-03-21 17:53:28 +01004241void qmp_blockdev_del(const char *node_name, Error **errp)
Alberto Garcia81b936a2015-11-02 16:51:55 +02004242{
4243 AioContext *aio_context;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004244 BlockDriverState *bs;
4245
Kevin Wolf9ec88732016-09-21 14:56:11 +02004246 bs = bdrv_find_node(node_name);
4247 if (!bs) {
4248 error_setg(errp, "Cannot find node %s", node_name);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004249 return;
4250 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004251 if (bdrv_has_blk(bs)) {
4252 error_setg(errp, "Node %s is in use", node_name);
4253 return;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004254 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004255 aio_context = bdrv_get_aio_context(bs);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004256 aio_context_acquire(aio_context);
4257
Kevin Wolf9ec88732016-09-21 14:56:11 +02004258 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
4259 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004260 }
4261
Kevin Wolf9ec88732016-09-21 14:56:11 +02004262 if (!bs->monitor_list.tqe_prev) {
4263 error_setg(errp, "Node %s is not owned by the monitor",
4264 bs->node_name);
4265 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004266 }
4267
Kevin Wolf9ec88732016-09-21 14:56:11 +02004268 if (bs->refcnt > 1) {
4269 error_setg(errp, "Block device %s is in use",
4270 bdrv_get_device_or_node_name(bs));
4271 goto out;
4272 }
4273
4274 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
4275 bdrv_unref(bs);
4276
Alberto Garcia81b936a2015-11-02 16:51:55 +02004277out:
4278 aio_context_release(aio_context);
4279}
4280
Wen Congyang7f821592016-05-10 15:36:39 +08004281static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs,
4282 const char *child_name)
4283{
4284 BdrvChild *child;
4285
4286 QLIST_FOREACH(child, &parent_bs->children, next) {
4287 if (strcmp(child->name, child_name) == 0) {
4288 return child;
4289 }
4290 }
4291
4292 return NULL;
4293}
4294
4295void qmp_x_blockdev_change(const char *parent, bool has_child,
4296 const char *child, bool has_node,
4297 const char *node, Error **errp)
4298{
4299 BlockDriverState *parent_bs, *new_bs = NULL;
4300 BdrvChild *p_child;
4301
4302 parent_bs = bdrv_lookup_bs(parent, parent, errp);
4303 if (!parent_bs) {
4304 return;
4305 }
4306
4307 if (has_child == has_node) {
4308 if (has_child) {
4309 error_setg(errp, "The parameters child and node are in conflict");
4310 } else {
4311 error_setg(errp, "Either child or node must be specified");
4312 }
4313 return;
4314 }
4315
4316 if (has_child) {
4317 p_child = bdrv_find_child(parent_bs, child);
4318 if (!p_child) {
4319 error_setg(errp, "Node '%s' does not have child '%s'",
4320 parent, child);
4321 return;
4322 }
4323 bdrv_del_child(parent_bs, p_child, errp);
4324 }
4325
4326 if (has_node) {
4327 new_bs = bdrv_find_node(node);
4328 if (!new_bs) {
4329 error_setg(errp, "Node '%s' not found", node);
4330 return;
4331 }
4332 bdrv_add_child(parent_bs, new_bs, errp);
4333 }
4334}
4335
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004336BlockJobInfoList *qmp_query_block_jobs(Error **errp)
4337{
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004338 BlockJobInfoList *head = NULL, **p_next = &head;
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004339 BlockJob *job;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004340
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004341 for (job = block_job_next(NULL); job; job = block_job_next(job)) {
John Snow559b9352016-10-27 12:06:55 -04004342 BlockJobInfoList *elem;
4343 AioContext *aio_context;
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004344
John Snow559b9352016-10-27 12:06:55 -04004345 if (block_job_is_internal(job)) {
4346 continue;
4347 }
4348 elem = g_new0(BlockJobInfoList, 1);
4349 aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004350 aio_context_acquire(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004351 elem->value = block_job_query(job, errp);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004352 aio_context_release(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004353 if (!elem->value) {
4354 g_free(elem);
4355 qapi_free_BlockJobInfoList(head);
4356 return NULL;
4357 }
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004358 *p_next = elem;
4359 p_next = &elem->next;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004360 }
4361
4362 return head;
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004363}
Paolo Bonzini4d454572012-11-26 16:03:42 +01004364
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004365void qmp_x_blockdev_set_iothread(const char *node_name, StrOrNull *iothread,
Stefan Hajnoczi882e9b82017-12-07 20:13:17 +00004366 bool has_force, bool force, Error **errp)
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004367{
4368 AioContext *old_context;
4369 AioContext *new_context;
4370 BlockDriverState *bs;
4371
4372 bs = bdrv_find_node(node_name);
4373 if (!bs) {
4374 error_setg(errp, "Cannot find node %s", node_name);
4375 return;
4376 }
4377
Stefan Hajnoczi882e9b82017-12-07 20:13:17 +00004378 /* Protects against accidents. */
4379 if (!(has_force && force) && bdrv_has_blk(bs)) {
4380 error_setg(errp, "Node %s is associated with a BlockBackend and could "
4381 "be in use (use force=true to override this check)",
4382 node_name);
Stefan Hajnoczica00bbb2017-12-06 14:45:49 +00004383 return;
4384 }
4385
4386 if (iothread->type == QTYPE_QSTRING) {
4387 IOThread *obj = iothread_by_id(iothread->u.s);
4388 if (!obj) {
4389 error_setg(errp, "Cannot find iothread %s", iothread->u.s);
4390 return;
4391 }
4392
4393 new_context = iothread_get_aio_context(obj);
4394 } else {
4395 new_context = qemu_get_aio_context();
4396 }
4397
4398 old_context = bdrv_get_aio_context(bs);
4399 aio_context_acquire(old_context);
4400
4401 bdrv_set_aio_context(bs, new_context);
4402
4403 aio_context_release(old_context);
4404}
4405
Vladimir Sementsov-Ogievskiy7e5c7762018-03-09 19:52:12 +03004406void qmp_x_block_latency_histogram_set(
4407 const char *device,
4408 bool has_boundaries, uint64List *boundaries,
4409 bool has_boundaries_read, uint64List *boundaries_read,
4410 bool has_boundaries_write, uint64List *boundaries_write,
4411 bool has_boundaries_flush, uint64List *boundaries_flush,
4412 Error **errp)
4413{
4414 BlockBackend *blk = blk_by_name(device);
4415 BlockAcctStats *stats;
4416
4417 if (!blk) {
4418 error_setg(errp, "Device '%s' not found", device);
4419 return;
4420 }
4421 stats = blk_get_stats(blk);
4422
4423 if (!has_boundaries && !has_boundaries_read && !has_boundaries_write &&
4424 !has_boundaries_flush)
4425 {
4426 block_latency_histograms_clear(stats);
4427 return;
4428 }
4429
4430 if (has_boundaries || has_boundaries_read) {
4431 block_latency_histogram_set(
4432 stats, BLOCK_ACCT_READ,
4433 has_boundaries_read ? boundaries_read : boundaries);
4434 }
4435
4436 if (has_boundaries || has_boundaries_write) {
4437 block_latency_histogram_set(
4438 stats, BLOCK_ACCT_WRITE,
4439 has_boundaries_write ? boundaries_write : boundaries);
4440 }
4441
4442 if (has_boundaries || has_boundaries_flush) {
4443 block_latency_histogram_set(
4444 stats, BLOCK_ACCT_FLUSH,
4445 has_boundaries_flush ? boundaries_flush : boundaries);
4446 }
4447}
4448
Kevin Wolf00063832013-03-15 10:35:07 +01004449QemuOptsList qemu_common_drive_opts = {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004450 .name = "drive",
Kevin Wolf00063832013-03-15 10:35:07 +01004451 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
Paolo Bonzini4d454572012-11-26 16:03:42 +01004452 .desc = {
4453 {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004454 .name = "snapshot",
4455 .type = QEMU_OPT_BOOL,
4456 .help = "enable/disable snapshot mode",
4457 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004458 .name = "aio",
4459 .type = QEMU_OPT_STRING,
4460 .help = "host AIO implementation (threads, native)",
4461 },{
Kevin Wolfe4b24b42016-03-15 15:39:42 +01004462 .name = BDRV_OPT_CACHE_WB,
4463 .type = QEMU_OPT_BOOL,
4464 .help = "Enable writeback mode",
4465 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004466 .name = "format",
4467 .type = QEMU_OPT_STRING,
4468 .help = "disk format (raw, qcow2, ...)",
4469 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004470 .name = "rerror",
4471 .type = QEMU_OPT_STRING,
4472 .help = "read error action",
4473 },{
4474 .name = "werror",
4475 .type = QEMU_OPT_STRING,
4476 .help = "write error action",
4477 },{
Alberto Garcia4e200cf2016-09-15 17:53:05 +03004478 .name = BDRV_OPT_READ_ONLY,
Paolo Bonzini4d454572012-11-26 16:03:42 +01004479 .type = QEMU_OPT_BOOL,
4480 .help = "open drive file as read-only",
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +01004481 },
4482
4483 THROTTLE_OPTS,
4484
4485 {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02004486 .name = "throttling.group",
4487 .type = QEMU_OPT_STRING,
4488 .help = "name of the block throttling group",
4489 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004490 .name = "copy-on-read",
4491 .type = QEMU_OPT_BOOL,
4492 .help = "copy read data from backing file into image file",
Peter Lieven465bee12014-05-18 00:58:19 +02004493 },{
4494 .name = "detect-zeroes",
4495 .type = QEMU_OPT_STRING,
4496 .help = "try to optimize zero writes (off, on, unmap)",
Alberto Garcia362e9292015-10-28 17:33:04 +02004497 },{
4498 .name = "stats-account-invalid",
4499 .type = QEMU_OPT_BOOL,
4500 .help = "whether to account for invalid I/O operations "
4501 "in the statistics",
4502 },{
4503 .name = "stats-account-failed",
4504 .type = QEMU_OPT_BOOL,
4505 .help = "whether to account for failed I/O operations "
4506 "in the statistics",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004507 },
4508 { /* end of list */ }
4509 },
4510};
Kevin Wolf00063832013-03-15 10:35:07 +01004511
4512QemuOptsList qemu_drive_opts = {
4513 .name = "drive",
4514 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4515 .desc = {
Kevin Wolf492fdc62013-06-19 13:44:17 +02004516 /*
4517 * no elements => accept any params
4518 * validation will happen later
4519 */
Kevin Wolf00063832013-03-15 10:35:07 +01004520 { /* end of list */ }
4521 },
4522};