blob: 6332a249ea3e1691ad2dedb7cda35e0c1f1311d3 [file] [log] [blame]
Markus Armbruster666daa62010-06-02 18:48:27 +02001/*
2 * QEMU host block devices
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or
7 * later. See the COPYING file in the top-level directory.
Markus Armbruster3618a092013-03-14 13:59:53 +01008 *
9 * This file incorporates work covered by the following copyright and
10 * permission notice:
11 *
12 * Copyright (c) 2003-2008 Fabrice Bellard
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
25 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
26 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
27 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
28 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
29 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 * THE SOFTWARE.
Markus Armbruster666daa62010-06-02 18:48:27 +020031 */
32
Peter Maydelld38ea872016-01-29 17:50:05 +000033#include "qemu/osdep.h"
Markus Armbruster26f54e92014-10-07 13:59:04 +020034#include "sysemu/block-backend.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010035#include "sysemu/blockdev.h"
Paolo Bonzini0d09e412013-02-05 17:06:20 +010036#include "hw/block/block.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010037#include "block/blockjob.h"
Alberto Garcia76f4afb2015-06-08 18:17:44 +020038#include "block/throttle-groups.h"
Paolo Bonzini83c90892012-12-17 18:19:49 +010039#include "monitor/monitor.h"
Markus Armbrusterd49b6832015-03-17 18:29:20 +010040#include "qemu/error-report.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010041#include "qemu/option.h"
42#include "qemu/config-file.h"
Paolo Bonzini7b1b5d12012-12-17 18:19:43 +010043#include "qapi/qmp/types.h"
Kevin Wolfd26c9a12013-09-23 15:26:03 +020044#include "qapi-visit.h"
Markus Armbrustercc7a8ea2015-03-17 17:22:46 +010045#include "qapi/qmp/qerror.h"
Daniel P. Berrangeb3db2112016-09-30 15:45:27 +010046#include "qapi/qobject-output-visitor.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010047#include "sysemu/sysemu.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010048#include "block/block_int.h"
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -020049#include "qmp-commands.h"
Daniel P. Berrange0ab8ed12017-01-25 16:14:15 +000050#include "block/trace.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010051#include "sysemu/arch_init.h"
Thomas Huthc616f162017-05-12 12:33:49 +020052#include "sysemu/qtest.h"
Veronia Bahaaf348b6d2016-03-20 19:16:19 +020053#include "qemu/cutils.h"
54#include "qemu/help_option.h"
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +010055#include "qemu/throttle-options.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020056
Max Reitz9c4218e2016-01-29 16:36:12 +010057static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
58 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
59
Kevin Wolfb33945c2016-09-20 13:38:43 +020060static int do_open_tray(const char *blk_name, const char *qdev_id,
61 bool force, Error **errp);
Colin Lordbf18bee2016-06-06 14:15:22 -040062
Markus Armbruster19609662011-01-28 11:21:39 +010063static const char *const if_name[IF_COUNT] = {
64 [IF_NONE] = "none",
65 [IF_IDE] = "ide",
66 [IF_SCSI] = "scsi",
67 [IF_FLOPPY] = "floppy",
68 [IF_PFLASH] = "pflash",
69 [IF_MTD] = "mtd",
70 [IF_SD] = "sd",
71 [IF_VIRTIO] = "virtio",
72 [IF_XEN] = "xen",
73};
74
John Snow21dff8c2014-10-01 14:19:25 -040075static int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010076 /*
77 * Do not change these numbers! They govern how drive option
78 * index maps to unit and bus. That mapping is ABI.
79 *
Wei Jiangang547cb152016-04-26 18:12:43 +080080 * All controllers used to implement if=T drives need to support
Markus Armbruster27d6bf42011-01-28 11:21:40 +010081 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
82 * Otherwise, some index values map to "impossible" bus, unit
83 * values.
84 *
85 * For instance, if you change [IF_SCSI] to 255, -drive
86 * if=scsi,index=12 no longer means bus=1,unit=5, but
87 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
88 * the drive can't be set up. Regression.
89 */
90 [IF_IDE] = 2,
91 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +010092};
93
John Snow21dff8c2014-10-01 14:19:25 -040094/**
95 * Boards may call this to offer board-by-board overrides
96 * of the default, global values.
97 */
98void override_max_devs(BlockInterfaceType type, int max_devs)
99{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200100 BlockBackend *blk;
John Snow21dff8c2014-10-01 14:19:25 -0400101 DriveInfo *dinfo;
102
103 if (max_devs <= 0) {
104 return;
105 }
106
Markus Armbruster18e46a02014-10-07 13:59:06 +0200107 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
108 dinfo = blk_legacy_dinfo(blk);
John Snow21dff8c2014-10-01 14:19:25 -0400109 if (dinfo->type == type) {
110 fprintf(stderr, "Cannot override units-per-bus property of"
111 " the %s interface, because a drive of that type has"
112 " already been added.\n", if_name[type]);
113 g_assert_not_reached();
114 }
115 }
116
117 if_max_devs[type] = max_devs;
118}
119
Markus Armbruster14bafc52010-06-25 08:09:10 +0200120/*
121 * We automatically delete the drive when a device using it gets
122 * unplugged. Questionable feature, but we can't just drop it.
123 * Device models call blockdev_mark_auto_del() to schedule the
124 * automatic deletion, and generic qdev code calls blockdev_auto_del()
125 * when deletion is actually safe.
126 */
Markus Armbruster4be74632014-10-07 13:59:18 +0200127void blockdev_mark_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200128{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200129 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster4be74632014-10-07 13:59:18 +0200130 BlockDriverState *bs = blk_bs(blk);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100131 AioContext *aio_context;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200132
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200133 if (!dinfo) {
Kevin Wolf2d246f02013-09-18 15:14:47 +0200134 return;
135 }
136
Max Reitz5433c242015-10-19 17:53:29 +0200137 if (bs) {
138 aio_context = bdrv_get_aio_context(bs);
139 aio_context_acquire(aio_context);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100140
Max Reitz5433c242015-10-19 17:53:29 +0200141 if (bs->job) {
142 block_job_cancel(bs->job);
143 }
144
145 aio_context_release(aio_context);
Paolo Bonzini12bde0e2012-03-30 13:17:10 +0200146 }
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100147
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200148 dinfo->auto_del = 1;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200149}
150
Markus Armbruster4be74632014-10-07 13:59:18 +0200151void blockdev_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200152{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200153 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200154
Ryan Harper0fc0f1f2010-12-08 10:05:00 -0600155 if (dinfo && dinfo->auto_del) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100156 monitor_remove_blk(blk);
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +0200157 blk_unref(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200158 }
159}
160
John Snowd8f94e12014-10-01 14:19:27 -0400161/**
162 * Returns the current mapping of how many units per bus
163 * a particular interface can support.
164 *
165 * A positive integer indicates n units per bus.
166 * 0 implies the mapping has not been established.
167 * -1 indicates an invalid BlockInterfaceType was given.
168 */
169int drive_get_max_devs(BlockInterfaceType type)
170{
171 if (type >= IF_IDE && type < IF_COUNT) {
172 return if_max_devs[type];
173 }
174
175 return -1;
176}
177
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100178static int drive_index_to_bus_id(BlockInterfaceType type, int index)
179{
180 int max_devs = if_max_devs[type];
181 return max_devs ? index / max_devs : 0;
182}
183
184static int drive_index_to_unit_id(BlockInterfaceType type, int index)
185{
186 int max_devs = if_max_devs[type];
187 return max_devs ? index % max_devs : index;
188}
189
Markus Armbruster2292dda2011-01-28 11:21:41 +0100190QemuOpts *drive_def(const char *optstr)
191{
Markus Armbruster70b94332015-02-13 12:50:26 +0100192 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100193}
194
195QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100196 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200197{
Markus Armbruster666daa62010-06-02 18:48:27 +0200198 QemuOpts *opts;
199
Markus Armbruster2292dda2011-01-28 11:21:41 +0100200 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200201 if (!opts) {
202 return NULL;
203 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100204 if (type != IF_DEFAULT) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100205 qemu_opt_set(opts, "if", if_name[type], &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100206 }
207 if (index >= 0) {
Markus Armbrustera8b18f82015-02-13 15:50:43 +0100208 qemu_opt_set_number(opts, "index", index, &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100209 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200210 if (file)
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100211 qemu_opt_set(opts, "file", file, &error_abort);
Markus Armbruster666daa62010-06-02 18:48:27 +0200212 return opts;
213}
214
215DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
216{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200217 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200218 DriveInfo *dinfo;
219
Markus Armbruster18e46a02014-10-07 13:59:06 +0200220 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
221 dinfo = blk_legacy_dinfo(blk);
222 if (dinfo && dinfo->type == type
223 && dinfo->bus == bus && dinfo->unit == unit) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200224 return dinfo;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200225 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200226 }
227
228 return NULL;
229}
230
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100231void drive_check_orphaned(void)
John Snowa66c9dc2014-10-01 14:19:24 -0400232{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200233 BlockBackend *blk;
John Snowa66c9dc2014-10-01 14:19:24 -0400234 DriveInfo *dinfo;
Markus Armbruster664cc622017-02-15 11:05:45 +0100235 Location loc;
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100236 bool orphans = false;
John Snowa66c9dc2014-10-01 14:19:24 -0400237
Markus Armbruster18e46a02014-10-07 13:59:06 +0200238 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
239 dinfo = blk_legacy_dinfo(blk);
Markus Armbrustera7f53e22014-10-07 13:59:25 +0200240 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
John Snowa66c9dc2014-10-01 14:19:24 -0400241 dinfo->type != IF_NONE) {
Markus Armbruster664cc622017-02-15 11:05:45 +0100242 loc_push_none(&loc);
243 qemu_opts_loc_restore(dinfo->opts);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100244 error_report("machine type does not support"
Markus Armbruster664cc622017-02-15 11:05:45 +0100245 " if=%s,bus=%d,unit=%d",
246 if_name[dinfo->type], dinfo->bus, dinfo->unit);
247 loc_pop(&loc);
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100248 orphans = true;
John Snowa66c9dc2014-10-01 14:19:24 -0400249 }
250 }
251
Markus Armbruster720b8dc2017-02-15 11:05:46 +0100252 if (orphans) {
253 exit(1);
254 }
John Snowa66c9dc2014-10-01 14:19:24 -0400255}
256
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100257DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
258{
259 return drive_get(type,
260 drive_index_to_bus_id(type, index),
261 drive_index_to_unit_id(type, index));
262}
263
Markus Armbruster666daa62010-06-02 18:48:27 +0200264int drive_get_max_bus(BlockInterfaceType type)
265{
266 int max_bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200267 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200268 DriveInfo *dinfo;
269
270 max_bus = -1;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200271 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
272 dinfo = blk_legacy_dinfo(blk);
273 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200274 max_bus = dinfo->bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200275 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200276 }
277 return max_bus;
278}
279
Markus Armbruster13839972011-01-28 11:21:37 +0100280/* Get a block device. This should only be used for single-drive devices
281 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
282 appropriate bus. */
283DriveInfo *drive_get_next(BlockInterfaceType type)
284{
285 static int next_block_unit[IF_COUNT];
286
287 return drive_get(type, 0, next_block_unit[type]++);
288}
289
Markus Armbruster666daa62010-06-02 18:48:27 +0200290static void bdrv_format_print(void *opaque, const char *name)
291{
Markus Armbruster807105a2011-01-17 19:31:27 +0100292 error_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200293}
294
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000295typedef struct {
296 QEMUBH *bh;
Fam Zhengfa510eb2013-08-23 09:14:51 +0800297 BlockDriverState *bs;
298} BDRVPutRefBH;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000299
Kevin Wolfb6810722013-09-20 11:33:11 +0200300static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200301{
302 if (!strcmp(buf, "ignore")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200303 return BLOCKDEV_ON_ERROR_IGNORE;
Markus Armbruster666daa62010-06-02 18:48:27 +0200304 } else if (!is_read && !strcmp(buf, "enospc")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200305 return BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200306 } else if (!strcmp(buf, "stop")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200307 return BLOCKDEV_ON_ERROR_STOP;
Markus Armbruster666daa62010-06-02 18:48:27 +0200308 } else if (!strcmp(buf, "report")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200309 return BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200310 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200311 error_setg(errp, "'%s' invalid %s error action",
312 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200313 return -1;
314 }
315}
316
Alberto Garcia40119ef2015-11-16 11:28:38 +0200317static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
318 Error **errp)
319{
320 const QListEntry *entry;
321 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
322 switch (qobject_type(entry->value)) {
323
324 case QTYPE_QSTRING: {
325 unsigned long long length;
326 const char *str = qstring_get_str(qobject_to_qstring(entry->value));
327 if (parse_uint_full(str, &length, 10) == 0 &&
328 length > 0 && length <= UINT_MAX) {
329 block_acct_add_interval(stats, (unsigned) length);
330 } else {
331 error_setg(errp, "Invalid interval length: %s", str);
332 return false;
333 }
334 break;
335 }
336
Marc-André Lureau01b2ffc2017-06-07 20:35:58 +0400337 case QTYPE_QNUM: {
338 int64_t length = qnum_get_int(qobject_to_qnum(entry->value));
339
Alberto Garcia40119ef2015-11-16 11:28:38 +0200340 if (length > 0 && length <= UINT_MAX) {
341 block_acct_add_interval(stats, (unsigned) length);
342 } else {
343 error_setg(errp, "Invalid interval length: %" PRId64, length);
344 return false;
345 }
346 break;
347 }
348
349 default:
350 error_setg(errp, "The specification of stats-intervals is invalid");
351 return false;
352 }
353 }
354 return true;
355}
356
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200357typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
358
Max Reitzfbf81752015-10-19 17:53:31 +0200359/* All parameters but @opts are optional and may be set to NULL. */
360static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
361 const char **throttling_group, ThrottleConfig *throttle_cfg,
362 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
363{
Max Reitzfbf81752015-10-19 17:53:31 +0200364 Error *local_error = NULL;
365 const char *aio;
366
367 if (bdrv_flags) {
Max Reitzfbf81752015-10-19 17:53:31 +0200368 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
369 *bdrv_flags |= BDRV_O_COPY_ON_READ;
370 }
371
Max Reitzfbf81752015-10-19 17:53:31 +0200372 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
373 if (!strcmp(aio, "native")) {
374 *bdrv_flags |= BDRV_O_NATIVE_AIO;
375 } else if (!strcmp(aio, "threads")) {
376 /* this is the default */
377 } else {
378 error_setg(errp, "invalid aio option");
379 return;
380 }
381 }
382 }
383
384 /* disk I/O throttling */
385 if (throttling_group) {
386 *throttling_group = qemu_opt_get(opts, "throttling.group");
387 }
388
389 if (throttle_cfg) {
Alberto Garcia1588ab52016-02-18 12:27:00 +0200390 throttle_config_init(throttle_cfg);
Max Reitzfbf81752015-10-19 17:53:31 +0200391 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
392 qemu_opt_get_number(opts, "throttling.bps-total", 0);
393 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
394 qemu_opt_get_number(opts, "throttling.bps-read", 0);
395 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
396 qemu_opt_get_number(opts, "throttling.bps-write", 0);
397 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
398 qemu_opt_get_number(opts, "throttling.iops-total", 0);
399 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
400 qemu_opt_get_number(opts, "throttling.iops-read", 0);
401 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
402 qemu_opt_get_number(opts, "throttling.iops-write", 0);
403
404 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
405 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
406 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
407 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
408 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
409 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
410 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
411 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
412 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
413 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
414 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
415 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
416
Alberto Garcia8a0fc182016-02-18 12:27:02 +0200417 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
418 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
419 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
420 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
421 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
422 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
423 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
424 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
425 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
426 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
427 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
428 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
429
Max Reitzfbf81752015-10-19 17:53:31 +0200430 throttle_cfg->op_size =
431 qemu_opt_get_number(opts, "throttling.iops-size", 0);
432
Alberto Garciad5851082016-02-18 12:26:59 +0200433 if (!throttle_is_valid(throttle_cfg, errp)) {
Max Reitzfbf81752015-10-19 17:53:31 +0200434 return;
435 }
436 }
437
438 if (detect_zeroes) {
439 *detect_zeroes =
Marc-André Lureauf7abe0e2017-08-24 10:46:10 +0200440 qapi_enum_parse(&BlockdevDetectZeroesOptions_lookup,
Max Reitzfbf81752015-10-19 17:53:31 +0200441 qemu_opt_get(opts, "detect-zeroes"),
Max Reitzfbf81752015-10-19 17:53:31 +0200442 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
443 &local_error);
444 if (local_error) {
445 error_propagate(errp, local_error);
446 return;
447 }
Max Reitzfbf81752015-10-19 17:53:31 +0200448 }
449}
450
Kevin Wolff298d072013-09-10 12:01:20 +0200451/* Takes the ownership of bs_opts */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200452static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
453 Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200454{
455 const char *buf;
Markus Armbruster666daa62010-06-02 18:48:27 +0200456 int bdrv_flags = 0;
457 int on_read_error, on_write_error;
Alberto Garcia362e9292015-10-28 17:33:04 +0200458 bool account_invalid, account_failed;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300459 bool writethrough, read_only;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200460 BlockBackend *blk;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200461 BlockDriverState *bs;
Benoît Canetcc0681c2013-09-02 14:14:39 +0200462 ThrottleConfig cfg;
Markus Armbruster666daa62010-06-02 18:48:27 +0200463 int snapshot = 0;
Stefan Hajnoczic5461942013-02-13 16:53:42 +0100464 Error *error = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100465 QemuOpts *opts;
Alberto Garcia40119ef2015-11-16 11:28:38 +0200466 QDict *interval_dict = NULL;
467 QList *interval_list = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100468 const char *id;
Max Reitzfbf81752015-10-19 17:53:31 +0200469 BlockdevDetectZeroesOptions detect_zeroes =
470 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
471 const char *throttling_group = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200472
Kevin Wolff298d072013-09-10 12:01:20 +0200473 /* Check common options by copying from bs_opts to opts, all other options
474 * stay in bs_opts for processing by bdrv_open(). */
475 id = qdict_get_try_str(bs_opts, "id");
Kevin Wolf00063832013-03-15 10:35:07 +0100476 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100477 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200478 error_propagate(errp, error);
Markus Armbruster6376f952014-05-28 11:17:01 +0200479 goto err_no_opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100480 }
481
Kevin Wolf00063832013-03-15 10:35:07 +0100482 qemu_opts_absorb_qdict(opts, bs_opts, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100483 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200484 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100485 goto early_err;
Kevin Wolf00063832013-03-15 10:35:07 +0100486 }
487
488 if (id) {
489 qdict_del(bs_opts, "id");
490 }
491
Markus Armbruster666daa62010-06-02 18:48:27 +0200492 /* extract parameters */
Markus Armbruster666daa62010-06-02 18:48:27 +0200493 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
Markus Armbruster666daa62010-06-02 18:48:27 +0200494
Alberto Garcia362e9292015-10-28 17:33:04 +0200495 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
496 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
497
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100498 writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
499
Alberto Garciaff356ee2016-07-08 17:03:00 +0300500 id = qemu_opts_id(opts);
501
Alberto Garcia40119ef2015-11-16 11:28:38 +0200502 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
503 qdict_array_split(interval_dict, &interval_list);
504
505 if (qdict_size(interval_dict) != 0) {
506 error_setg(errp, "Invalid option stats-intervals.%s",
507 qdict_first(interval_dict)->key);
508 goto early_err;
509 }
Alberto Garcia2be55062015-10-28 17:33:07 +0200510
Max Reitzfbf81752015-10-19 17:53:31 +0200511 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
512 &detect_zeroes, &error);
513 if (error) {
514 error_propagate(errp, error);
515 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200516 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200517
518 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
Peter Maydellc8057f92012-08-02 13:45:54 +0100519 if (is_help_option(buf)) {
520 error_printf("Supported formats:");
521 bdrv_iterate_format(bdrv_format_print, NULL);
522 error_printf("\n");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100523 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200524 }
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200525
Max Reitze4342ce2015-02-05 13:58:14 -0500526 if (qdict_haskey(bs_opts, "driver")) {
527 error_setg(errp, "Cannot specify both 'driver' and 'format'");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100528 goto early_err;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400529 }
Eric Blake46f5ac22017-04-27 16:58:17 -0500530 qdict_put_str(bs_opts, "driver", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200531 }
532
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200533 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200534 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200535 on_write_error = parse_block_error_action(buf, 0, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100536 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200537 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100538 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200539 }
540 }
541
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200542 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200543 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200544 on_read_error = parse_block_error_action(buf, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100545 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200546 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100547 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200548 }
549 }
550
Max Reitz5ec18f82015-10-19 17:53:30 +0200551 if (snapshot) {
Kevin Wolf91a097e2015-05-08 17:49:53 +0200552 bdrv_flags |= BDRV_O_SNAPSHOT;
Max Reitz5ec18f82015-10-19 17:53:30 +0200553 }
554
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300555 read_only = qemu_opt_get_bool(opts, BDRV_OPT_READ_ONLY, false);
556
Kevin Wolf326642b2013-07-11 12:52:34 +0200557 /* init */
Kevin Wolf39c4ae92015-11-13 14:45:42 +0100558 if ((!file || !*file) && !qdict_size(bs_opts)) {
Max Reitz5ec18f82015-10-19 17:53:30 +0200559 BlockBackendRootState *blk_rs;
560
Kevin Wolf6d0eb642017-01-20 17:07:26 +0100561 blk = blk_new(0, BLK_PERM_ALL);
Max Reitz5ec18f82015-10-19 17:53:30 +0200562 blk_rs = blk_get_root_state(blk);
563 blk_rs->open_flags = bdrv_flags;
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300564 blk_rs->read_only = read_only;
Max Reitz5ec18f82015-10-19 17:53:30 +0200565 blk_rs->detect_zeroes = detect_zeroes;
566
Max Reitze4342ce2015-02-05 13:58:14 -0500567 QDECREF(bs_opts);
568 } else {
569 if (file && !*file) {
570 file = NULL;
571 }
572
Kevin Wolf91a097e2015-05-08 17:49:53 +0200573 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
574 * with other callers) rather than what we want as the real defaults.
575 * Apply the defaults here instead. */
Kevin Wolf91a097e2015-05-08 17:49:53 +0200576 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
577 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300578 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY,
579 read_only ? "on" : "off");
Kevin Wolf72e775c2016-03-15 14:34:37 +0100580 assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
Kevin Wolf91a097e2015-05-08 17:49:53 +0200581
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100582 if (runstate_check(RUN_STATE_INMIGRATE)) {
583 bdrv_flags |= BDRV_O_INACTIVE;
584 }
585
Max Reitzefaa7c42016-03-16 19:54:38 +0100586 blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
Max Reitze4342ce2015-02-05 13:58:14 -0500587 if (!blk) {
588 goto err_no_bs_opts;
589 }
590 bs = blk_bs(blk);
Max Reitze4342ce2015-02-05 13:58:14 -0500591
Max Reitz5ec18f82015-10-19 17:53:30 +0200592 bs->detect_zeroes = detect_zeroes;
593
Paolo Bonzini9caa6f32017-06-05 14:39:07 +0200594 block_acct_setup(blk_get_stats(blk), account_invalid, account_failed);
Alberto Garcia2be55062015-10-28 17:33:07 +0200595
Alberto Garcia40119ef2015-11-16 11:28:38 +0200596 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
597 blk_unref(blk);
598 blk = NULL;
599 goto err_no_bs_opts;
Alberto Garcia2be55062015-10-28 17:33:07 +0200600 }
Max Reitz5ec18f82015-10-19 17:53:30 +0200601 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200602
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100603 /* disk I/O throttling */
604 if (throttle_enabled(&cfg)) {
605 if (!throttling_group) {
Alberto Garciaff356ee2016-07-08 17:03:00 +0300606 throttling_group = id;
Kevin Wolf7ca7f0f2016-03-22 13:00:08 +0100607 }
608 blk_io_limits_enable(blk, throttling_group);
609 blk_set_io_limits(blk, &cfg);
610 }
611
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100612 blk_set_enable_write_cache(blk, !writethrough);
Max Reitz373340b2015-10-19 17:53:22 +0200613 blk_set_on_error(blk, on_read_error, on_write_error);
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200614
Alberto Garciaff356ee2016-07-08 17:03:00 +0300615 if (!monitor_add_blk(blk, id, errp)) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100616 blk_unref(blk);
617 blk = NULL;
618 goto err_no_bs_opts;
619 }
620
Max Reitze4342ce2015-02-05 13:58:14 -0500621err_no_bs_opts:
Kevin Wolf00063832013-03-15 10:35:07 +0100622 qemu_opts_del(opts);
Alberto Garcia40119ef2015-11-16 11:28:38 +0200623 QDECREF(interval_dict);
624 QDECREF(interval_list);
Markus Armbruster18e46a02014-10-07 13:59:06 +0200625 return blk;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100626
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100627early_err:
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100628 qemu_opts_del(opts);
Alberto Garcia40119ef2015-11-16 11:28:38 +0200629 QDECREF(interval_dict);
630 QDECREF(interval_list);
Markus Armbruster6376f952014-05-28 11:17:01 +0200631err_no_opts:
632 QDECREF(bs_opts);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100633 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200634}
635
Max Reitzbd745e22015-10-19 17:53:32 +0200636/* Takes the ownership of bs_opts */
637static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
638{
Max Reitzbd745e22015-10-19 17:53:32 +0200639 int bdrv_flags = 0;
640
Kevin Wolfa81d6162016-03-07 14:23:04 +0100641 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
642 * with other callers) rather than what we want as the real defaults.
643 * Apply the defaults here instead. */
Kevin Wolfa81d6162016-03-07 14:23:04 +0100644 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
645 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Alberto Garciaf87a0e22016-09-15 17:53:02 +0300646 qdict_set_default_str(bs_opts, BDRV_OPT_READ_ONLY, "off");
Kevin Wolfa81d6162016-03-07 14:23:04 +0100647
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100648 if (runstate_check(RUN_STATE_INMIGRATE)) {
649 bdrv_flags |= BDRV_O_INACTIVE;
650 }
651
Kevin Wolf74e1ae72016-09-20 20:48:52 +0200652 return bdrv_open(NULL, NULL, bs_opts, bdrv_flags, errp);
Max Reitzbd745e22015-10-19 17:53:32 +0200653}
654
Max Reitz9c4218e2016-01-29 16:36:12 +0100655void blockdev_close_all_bdrv_states(void)
656{
657 BlockDriverState *bs, *next_bs;
658
659 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
660 AioContext *ctx = bdrv_get_aio_context(bs);
661
662 aio_context_acquire(ctx);
663 bdrv_unref(bs);
664 aio_context_release(ctx);
665 }
666}
667
Max Reitz262b4e82016-03-16 19:54:41 +0100668/* Iterates over the list of monitor-owned BlockDriverStates */
669BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
670{
671 return bs ? QTAILQ_NEXT(bs, monitor_list)
672 : QTAILQ_FIRST(&monitor_bdrv_states);
673}
674
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200675static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
676 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200677{
678 const char *value;
679
680 value = qemu_opt_get(opts, from);
681 if (value) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200682 if (qemu_opt_find(opts, to)) {
683 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
684 "same time", to, from);
685 return;
686 }
Jun Li20d6cd42014-09-24 13:45:27 +0800687 }
688
689 /* rename all items in opts */
690 while ((value = qemu_opt_get(opts, from))) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100691 qemu_opt_set(opts, to, value, &error_abort);
Kevin Wolf57975222013-07-17 14:41:54 +0200692 qemu_opt_unset(opts, from);
693 }
694}
695
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200696QemuOptsList qemu_legacy_drive_opts = {
697 .name = "drive",
698 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
699 .desc = {
700 {
Kevin Wolf87a899c2013-09-10 15:48:13 +0200701 .name = "bus",
702 .type = QEMU_OPT_NUMBER,
703 .help = "bus number",
704 },{
705 .name = "unit",
706 .type = QEMU_OPT_NUMBER,
707 .help = "unit number (i.e. lun for scsi)",
708 },{
709 .name = "index",
710 .type = QEMU_OPT_NUMBER,
711 .help = "index number",
712 },{
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200713 .name = "media",
714 .type = QEMU_OPT_STRING,
715 .help = "media type (disk, cdrom)",
Kevin Wolf593d4642013-08-28 17:24:51 +0200716 },{
717 .name = "if",
718 .type = QEMU_OPT_STRING,
719 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
Kevin Wolfb41a7332013-09-09 16:49:49 +0200720 },{
721 .name = "cyls",
722 .type = QEMU_OPT_NUMBER,
723 .help = "number of cylinders (ide disk geometry)",
724 },{
725 .name = "heads",
726 .type = QEMU_OPT_NUMBER,
727 .help = "number of heads (ide disk geometry)",
728 },{
729 .name = "secs",
730 .type = QEMU_OPT_NUMBER,
731 .help = "number of sectors (ide disk geometry)",
732 },{
733 .name = "trans",
734 .type = QEMU_OPT_STRING,
735 .help = "chs translation (auto, lba, none)",
Kevin Wolf26929292013-09-09 17:01:03 +0200736 },{
737 .name = "boot",
738 .type = QEMU_OPT_BOOL,
739 .help = "(deprecated, ignored)",
Kevin Wolf394c7d42013-09-13 14:09:17 +0200740 },{
741 .name = "addr",
742 .type = QEMU_OPT_STRING,
743 .help = "pci address (virtio only)",
Max Reitzd095b462013-12-20 19:28:14 +0100744 },{
Kevin Wolfbcf83152014-06-06 15:21:48 +0200745 .name = "serial",
746 .type = QEMU_OPT_STRING,
747 .help = "disk serial number",
748 },{
Max Reitzd095b462013-12-20 19:28:14 +0100749 .name = "file",
750 .type = QEMU_OPT_STRING,
751 .help = "file name",
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200752 },
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200753
754 /* Options that are passed on, but have special semantics with -drive */
755 {
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300756 .name = BDRV_OPT_READ_ONLY,
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200757 .type = QEMU_OPT_BOOL,
758 .help = "open drive file as read-only",
759 },{
Kevin Wolfee13ed12014-02-09 09:52:32 +0100760 .name = "rerror",
761 .type = QEMU_OPT_STRING,
762 .help = "read error action",
763 },{
764 .name = "werror",
765 .type = QEMU_OPT_STRING,
766 .help = "write error action",
767 },{
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200768 .name = "copy-on-read",
769 .type = QEMU_OPT_BOOL,
770 .help = "copy read data from backing file into image file",
771 },
772
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200773 { /* end of list */ }
774 },
775};
776
Markus Armbruster60e19e02014-06-06 14:50:58 +0200777DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
Kevin Wolf57975222013-07-17 14:41:54 +0200778{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200779 const char *value;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200780 BlockBackend *blk;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200781 DriveInfo *dinfo = NULL;
Kevin Wolff298d072013-09-10 12:01:20 +0200782 QDict *bs_opts;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200783 QemuOpts *legacy_opts;
784 DriveMediaType media = MEDIA_DISK;
Kevin Wolf593d4642013-08-28 17:24:51 +0200785 BlockInterfaceType type;
Kevin Wolfb41a7332013-09-09 16:49:49 +0200786 int cyls, heads, secs, translation;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200787 int max_devs, bus_id, unit_id, index;
Kevin Wolf394c7d42013-09-13 14:09:17 +0200788 const char *devaddr;
Kevin Wolfee13ed12014-02-09 09:52:32 +0100789 const char *werror, *rerror;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800790 bool read_only = false;
791 bool copy_on_read;
Kevin Wolfbcf83152014-06-06 15:21:48 +0200792 const char *serial;
Max Reitzd095b462013-12-20 19:28:14 +0100793 const char *filename;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200794 Error *local_err = NULL;
Kevin Wolf247147f2014-09-24 16:37:14 +0200795 int i;
Thomas Huthc616f162017-05-12 12:33:49 +0200796 const char *deprecated[] = {
797 "serial", "trans", "secs", "heads", "cyls", "addr"
798 };
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200799
Kevin Wolf57975222013-07-17 14:41:54 +0200800 /* Change legacy command line options into QMP ones */
Kevin Wolf247147f2014-09-24 16:37:14 +0200801 static const struct {
802 const char *from;
803 const char *to;
804 } opt_renames[] = {
805 { "iops", "throttling.iops-total" },
806 { "iops_rd", "throttling.iops-read" },
807 { "iops_wr", "throttling.iops-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200808
Kevin Wolf247147f2014-09-24 16:37:14 +0200809 { "bps", "throttling.bps-total" },
810 { "bps_rd", "throttling.bps-read" },
811 { "bps_wr", "throttling.bps-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200812
Kevin Wolf247147f2014-09-24 16:37:14 +0200813 { "iops_max", "throttling.iops-total-max" },
814 { "iops_rd_max", "throttling.iops-read-max" },
815 { "iops_wr_max", "throttling.iops-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200816
Kevin Wolf247147f2014-09-24 16:37:14 +0200817 { "bps_max", "throttling.bps-total-max" },
818 { "bps_rd_max", "throttling.bps-read-max" },
819 { "bps_wr_max", "throttling.bps-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200820
Kevin Wolf247147f2014-09-24 16:37:14 +0200821 { "iops_size", "throttling.iops-size" },
Benoît Canet2024c1d2013-09-02 14:14:41 +0200822
Alberto Garcia76f4afb2015-06-08 18:17:44 +0200823 { "group", "throttling.group" },
824
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300825 { "readonly", BDRV_OPT_READ_ONLY },
Kevin Wolf247147f2014-09-24 16:37:14 +0200826 };
827
828 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200829 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
830 &local_err);
831 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +0100832 error_report_err(local_err);
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200833 return NULL;
834 }
Kevin Wolf247147f2014-09-24 16:37:14 +0200835 }
Kevin Wolf0f227a92013-07-19 20:07:29 +0200836
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200837 value = qemu_opt_get(all_opts, "cache");
838 if (value) {
839 int flags = 0;
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100840 bool writethrough;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200841
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100842 if (bdrv_parse_cache_mode(value, &flags, &writethrough) != 0) {
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200843 error_report("invalid cache option");
844 return NULL;
845 }
846
847 /* Specific options take precedence */
Kevin Wolf54861b92015-04-07 16:55:00 +0200848 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
849 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
Kevin Wolf04feb4a2016-03-18 15:35:51 +0100850 !writethrough, &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200851 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200852 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
853 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100854 !!(flags & BDRV_O_NOCACHE), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200855 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200856 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
857 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100858 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200859 }
860 qemu_opt_unset(all_opts, "cache");
861 }
862
Kevin Wolff298d072013-09-10 12:01:20 +0200863 /* Get a QDict for processing the options */
864 bs_opts = qdict_new();
865 qemu_opts_to_qdict(all_opts, bs_opts);
866
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800867 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
868 &error_abort);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200869 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100870 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +0100871 error_report_err(local_err);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200872 goto fail;
873 }
874
Kevin Wolf26929292013-09-09 17:01:03 +0200875 /* Deprecated option boot=[on|off] */
876 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
877 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
878 "ignored. Future versions will reject this parameter. Please "
879 "update your scripts.\n");
880 }
881
Thomas Huthc616f162017-05-12 12:33:49 +0200882 /* Other deprecated options */
883 if (!qtest_enabled()) {
884 for (i = 0; i < ARRAY_SIZE(deprecated); i++) {
885 if (qemu_opt_get(legacy_opts, deprecated[i]) != NULL) {
886 error_report("'%s' is deprecated, please use the corresponding "
887 "option of '-device' instead", deprecated[i]);
888 }
889 }
890 }
891
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200892 /* Media type */
893 value = qemu_opt_get(legacy_opts, "media");
894 if (value) {
895 if (!strcmp(value, "disk")) {
896 media = MEDIA_DISK;
897 } else if (!strcmp(value, "cdrom")) {
898 media = MEDIA_CDROM;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800899 read_only = true;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200900 } else {
901 error_report("'%s' invalid media", value);
902 goto fail;
903 }
904 }
905
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200906 /* copy-on-read is disabled with a warning for read-only devices */
Alberto Garcia4e200cf2016-09-15 17:53:05 +0300907 read_only |= qemu_opt_get_bool(legacy_opts, BDRV_OPT_READ_ONLY, false);
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200908 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
909
910 if (read_only && copy_on_read) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700911 warn_report("disabling copy-on-read on read-only drive");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200912 copy_on_read = false;
913 }
914
Eric Blake46f5ac22017-04-27 16:58:17 -0500915 qdict_put_str(bs_opts, BDRV_OPT_READ_ONLY, read_only ? "on" : "off");
916 qdict_put_str(bs_opts, "copy-on-read", copy_on_read ? "on" : "off");
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200917
Kevin Wolf593d4642013-08-28 17:24:51 +0200918 /* Controller type */
919 value = qemu_opt_get(legacy_opts, "if");
920 if (value) {
921 for (type = 0;
922 type < IF_COUNT && strcmp(value, if_name[type]);
923 type++) {
924 }
925 if (type == IF_COUNT) {
926 error_report("unsupported bus type '%s'", value);
927 goto fail;
928 }
929 } else {
930 type = block_default_type;
931 }
932
Kevin Wolfb41a7332013-09-09 16:49:49 +0200933 /* Geometry */
934 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
935 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
936 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
937
938 if (cyls || heads || secs) {
939 if (cyls < 1) {
940 error_report("invalid physical cyls number");
941 goto fail;
942 }
943 if (heads < 1) {
944 error_report("invalid physical heads number");
945 goto fail;
946 }
947 if (secs < 1) {
948 error_report("invalid physical secs number");
949 goto fail;
950 }
951 }
952
953 translation = BIOS_ATA_TRANSLATION_AUTO;
954 value = qemu_opt_get(legacy_opts, "trans");
955 if (value != NULL) {
956 if (!cyls) {
957 error_report("'%s' trans must be used with cyls, heads and secs",
958 value);
959 goto fail;
960 }
961 if (!strcmp(value, "none")) {
962 translation = BIOS_ATA_TRANSLATION_NONE;
963 } else if (!strcmp(value, "lba")) {
964 translation = BIOS_ATA_TRANSLATION_LBA;
Paolo Bonzinif31c41f2014-02-08 11:01:54 +0100965 } else if (!strcmp(value, "large")) {
966 translation = BIOS_ATA_TRANSLATION_LARGE;
967 } else if (!strcmp(value, "rechs")) {
968 translation = BIOS_ATA_TRANSLATION_RECHS;
Kevin Wolfb41a7332013-09-09 16:49:49 +0200969 } else if (!strcmp(value, "auto")) {
970 translation = BIOS_ATA_TRANSLATION_AUTO;
971 } else {
972 error_report("'%s' invalid translation type", value);
973 goto fail;
974 }
975 }
976
977 if (media == MEDIA_CDROM) {
978 if (cyls || secs || heads) {
979 error_report("CHS can't be set with media=cdrom");
980 goto fail;
981 }
982 }
983
Kevin Wolf87a899c2013-09-10 15:48:13 +0200984 /* Device address specified by bus/unit or index.
985 * If none was specified, try to find the first free one. */
986 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
987 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
988 index = qemu_opt_get_number(legacy_opts, "index", -1);
989
990 max_devs = if_max_devs[type];
991
992 if (index != -1) {
993 if (bus_id != 0 || unit_id != -1) {
994 error_report("index cannot be used with bus and unit");
995 goto fail;
996 }
997 bus_id = drive_index_to_bus_id(type, index);
998 unit_id = drive_index_to_unit_id(type, index);
999 }
1000
1001 if (unit_id == -1) {
1002 unit_id = 0;
1003 while (drive_get(type, bus_id, unit_id) != NULL) {
1004 unit_id++;
1005 if (max_devs && unit_id >= max_devs) {
1006 unit_id -= max_devs;
1007 bus_id++;
1008 }
1009 }
1010 }
1011
1012 if (max_devs && unit_id >= max_devs) {
1013 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
1014 goto fail;
1015 }
1016
1017 if (drive_get(type, bus_id, unit_id) != NULL) {
1018 error_report("drive with bus=%d, unit=%d (index=%d) exists",
1019 bus_id, unit_id, index);
1020 goto fail;
1021 }
1022
Kevin Wolfbcf83152014-06-06 15:21:48 +02001023 /* Serial number */
1024 serial = qemu_opt_get(legacy_opts, "serial");
1025
Kevin Wolf87a899c2013-09-10 15:48:13 +02001026 /* no id supplied -> create one */
1027 if (qemu_opts_id(all_opts) == NULL) {
1028 char *new_id;
1029 const char *mediastr = "";
1030 if (type == IF_IDE || type == IF_SCSI) {
1031 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
1032 }
1033 if (max_devs) {
1034 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
1035 mediastr, unit_id);
1036 } else {
1037 new_id = g_strdup_printf("%s%s%i", if_name[type],
1038 mediastr, unit_id);
1039 }
Eric Blake46f5ac22017-04-27 16:58:17 -05001040 qdict_put_str(bs_opts, "id", new_id);
Kevin Wolf87a899c2013-09-10 15:48:13 +02001041 g_free(new_id);
1042 }
1043
Kevin Wolf394c7d42013-09-13 14:09:17 +02001044 /* Add virtio block device */
1045 devaddr = qemu_opt_get(legacy_opts, "addr");
1046 if (devaddr && type != IF_VIRTIO) {
1047 error_report("addr is not supported by this bus type");
1048 goto fail;
1049 }
1050
1051 if (type == IF_VIRTIO) {
1052 QemuOpts *devopts;
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -08001053 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
1054 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001055 if (arch_type == QEMU_ARCH_S390X) {
Alexander Graf1f68f1d2015-06-16 23:06:33 +02001056 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001057 } else {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001058 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001059 }
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001060 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
1061 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001062 if (devaddr) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001063 qemu_opt_set(devopts, "addr", devaddr, &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001064 }
1065 }
1066
Max Reitzd095b462013-12-20 19:28:14 +01001067 filename = qemu_opt_get(legacy_opts, "file");
1068
Kevin Wolfee13ed12014-02-09 09:52:32 +01001069 /* Check werror/rerror compatibility with if=... */
1070 werror = qemu_opt_get(legacy_opts, "werror");
1071 if (werror != NULL) {
1072 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
1073 type != IF_NONE) {
1074 error_report("werror is not supported by this bus type");
1075 goto fail;
1076 }
Eric Blake46f5ac22017-04-27 16:58:17 -05001077 qdict_put_str(bs_opts, "werror", werror);
Kevin Wolfee13ed12014-02-09 09:52:32 +01001078 }
1079
1080 rerror = qemu_opt_get(legacy_opts, "rerror");
1081 if (rerror != NULL) {
1082 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
1083 type != IF_NONE) {
1084 error_report("rerror is not supported by this bus type");
1085 goto fail;
1086 }
Eric Blake46f5ac22017-04-27 16:58:17 -05001087 qdict_put_str(bs_opts, "rerror", rerror);
Kevin Wolfee13ed12014-02-09 09:52:32 +01001088 }
1089
Kevin Wolf2d246f02013-09-18 15:14:47 +02001090 /* Actual block device init: Functionality shared with blockdev-add */
Markus Armbruster18e46a02014-10-07 13:59:06 +02001091 blk = blockdev_init(filename, bs_opts, &local_err);
Markus Armbruster3cb0e252014-05-28 11:17:02 +02001092 bs_opts = NULL;
Markus Armbruster18e46a02014-10-07 13:59:06 +02001093 if (!blk) {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001094 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +01001095 error_report_err(local_err);
Kevin Wolfb6810722013-09-20 11:33:11 +02001096 }
Kevin Wolf2d246f02013-09-18 15:14:47 +02001097 goto fail;
Kevin Wolfb6810722013-09-20 11:33:11 +02001098 } else {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001099 assert(!local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001100 }
1101
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001102 /* Create legacy DriveInfo */
1103 dinfo = g_malloc0(sizeof(*dinfo));
Kevin Wolff298d072013-09-10 12:01:20 +02001104 dinfo->opts = all_opts;
Kevin Wolf2d246f02013-09-18 15:14:47 +02001105
Kevin Wolfb41a7332013-09-09 16:49:49 +02001106 dinfo->cyls = cyls;
1107 dinfo->heads = heads;
1108 dinfo->secs = secs;
1109 dinfo->trans = translation;
1110
Kevin Wolfee13ed12014-02-09 09:52:32 +01001111 dinfo->type = type;
Kevin Wolf87a899c2013-09-10 15:48:13 +02001112 dinfo->bus = bus_id;
1113 dinfo->unit = unit_id;
Kevin Wolf394c7d42013-09-13 14:09:17 +02001114 dinfo->devaddr = devaddr;
Kevin Wolfbcf83152014-06-06 15:21:48 +02001115 dinfo->serial = g_strdup(serial);
1116
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001117 blk_set_legacy_dinfo(blk, dinfo);
1118
Kevin Wolfe34ef042013-09-19 14:24:10 +02001119 switch(type) {
1120 case IF_IDE:
1121 case IF_SCSI:
1122 case IF_XEN:
1123 case IF_NONE:
1124 dinfo->media_cd = media == MEDIA_CDROM;
1125 break;
1126 default:
1127 break;
1128 }
1129
Kevin Wolf2d246f02013-09-18 15:14:47 +02001130fail:
Kevin Wolf33cb7dc2013-08-28 17:00:13 +02001131 qemu_opts_del(legacy_opts);
Markus Armbruster3cb0e252014-05-28 11:17:02 +02001132 QDECREF(bs_opts);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001133 return dinfo;
Kevin Wolf57975222013-07-17 14:41:54 +02001134}
1135
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02001136static BlockDriverState *qmp_get_root_bs(const char *name, Error **errp)
1137{
1138 BlockDriverState *bs;
1139
1140 bs = bdrv_lookup_bs(name, name, errp);
1141 if (bs == NULL) {
1142 return NULL;
1143 }
1144
1145 if (!bdrv_is_root_node(bs)) {
1146 error_setg(errp, "Need a root block node");
1147 return NULL;
1148 }
1149
1150 if (!bdrv_is_inserted(bs)) {
1151 error_setg(errp, "Device has no medium");
1152 return NULL;
1153 }
1154
1155 return bs;
1156}
1157
Kevin Wolfb33945c2016-09-20 13:38:43 +02001158static BlockBackend *qmp_get_blk(const char *blk_name, const char *qdev_id,
1159 Error **errp)
1160{
1161 BlockBackend *blk;
1162
1163 if (!blk_name == !qdev_id) {
1164 error_setg(errp, "Need exactly one of 'device' and 'id'");
1165 return NULL;
1166 }
1167
1168 if (qdev_id) {
1169 blk = blk_by_qdev_id(qdev_id, errp);
1170 } else {
1171 blk = blk_by_name(blk_name);
1172 if (blk == NULL) {
1173 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1174 "Device '%s' not found", blk_name);
1175 }
1176 }
1177
1178 return blk;
1179}
1180
Markus Armbruster3e5a50d2015-02-06 13:55:43 +01001181void hmp_commit(Monitor *mon, const QDict *qdict)
Markus Armbruster666daa62010-06-02 18:48:27 +02001182{
Markus Armbruster666daa62010-06-02 18:48:27 +02001183 const char *device = qdict_get_str(qdict, "device");
Fam Zhenga0e85442015-03-02 19:36:48 +08001184 BlockBackend *blk;
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001185 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +02001186
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001187 if (!strcmp(device, "all")) {
Max Reitzda31d592016-03-16 19:54:32 +01001188 ret = blk_commit_all();
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001189 } else {
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001190 BlockDriverState *bs;
1191 AioContext *aio_context;
1192
Fam Zhenga0e85442015-03-02 19:36:48 +08001193 blk = blk_by_name(device);
1194 if (!blk) {
Jeff Cody58513bd2013-01-18 12:45:35 -05001195 monitor_printf(mon, "Device '%s' not found\n", device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001196 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001197 }
Max Reitz5433c242015-10-19 17:53:29 +02001198 if (!blk_is_available(blk)) {
1199 monitor_printf(mon, "Device '%s' has no medium\n", device);
1200 return;
1201 }
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001202
1203 bs = blk_bs(blk);
1204 aio_context = bdrv_get_aio_context(bs);
1205 aio_context_acquire(aio_context);
1206
1207 ret = bdrv_commit(bs);
1208
1209 aio_context_release(aio_context);
Jeff Cody58513bd2013-01-18 12:45:35 -05001210 }
1211 if (ret < 0) {
1212 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1213 strerror(-ret));
Markus Armbruster666daa62010-06-02 18:48:27 +02001214 }
1215}
1216
Eric Blake10f75902016-03-03 09:16:50 -07001217static void blockdev_do_action(TransactionAction *action, Error **errp)
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001218{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001219 TransactionActionList list;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001220
Eric Blake10f75902016-03-03 09:16:50 -07001221 list.value = action;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001222 list.next = NULL;
John Snow94d16a62015-11-05 18:13:18 -05001223 qmp_transaction(&list, false, NULL, errp);
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001224}
1225
Benoît Canet0901f672014-01-23 21:31:38 +01001226void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1227 bool has_node_name, const char *node_name,
1228 const char *snapshot_file,
1229 bool has_snapshot_node_name,
1230 const char *snapshot_node_name,
Luiz Capitulino6106e242011-11-25 16:15:19 -02001231 bool has_format, const char *format,
Benoît Canet0901f672014-01-23 21:31:38 +01001232 bool has_mode, NewImageMode mode, Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +01001233{
Alberto Garciaa911e6a2015-10-26 14:27:14 +02001234 BlockdevSnapshotSync snapshot = {
Benoît Canet0901f672014-01-23 21:31:38 +01001235 .has_device = has_device,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001236 .device = (char *) device,
Benoît Canet0901f672014-01-23 21:31:38 +01001237 .has_node_name = has_node_name,
1238 .node_name = (char *) node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001239 .snapshot_file = (char *) snapshot_file,
Benoît Canet0901f672014-01-23 21:31:38 +01001240 .has_snapshot_node_name = has_snapshot_node_name,
1241 .snapshot_node_name = (char *) snapshot_node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001242 .has_format = has_format,
1243 .format = (char *) format,
1244 .has_mode = has_mode,
1245 .mode = mode,
1246 };
Eric Blake10f75902016-03-03 09:16:50 -07001247 TransactionAction action = {
1248 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001249 .u.blockdev_snapshot_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001250 };
1251 blockdev_do_action(&action, errp);
Jes Sorensenf8882562010-12-16 13:52:16 +01001252}
1253
Alberto Garcia43de7e22015-10-26 14:27:16 +02001254void qmp_blockdev_snapshot(const char *node, const char *overlay,
1255 Error **errp)
1256{
1257 BlockdevSnapshot snapshot_data = {
1258 .node = (char *) node,
1259 .overlay = (char *) overlay
1260 };
Eric Blake10f75902016-03-03 09:16:50 -07001261 TransactionAction action = {
1262 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
Eric Blake32bafa82016-03-17 16:48:37 -06001263 .u.blockdev_snapshot.data = &snapshot_data,
Eric Blake10f75902016-03-03 09:16:50 -07001264 };
1265 blockdev_do_action(&action, errp);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001266}
1267
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001268void qmp_blockdev_snapshot_internal_sync(const char *device,
1269 const char *name,
1270 Error **errp)
1271{
1272 BlockdevSnapshotInternal snapshot = {
1273 .device = (char *) device,
1274 .name = (char *) name
1275 };
Eric Blake10f75902016-03-03 09:16:50 -07001276 TransactionAction action = {
1277 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001278 .u.blockdev_snapshot_internal_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001279 };
1280 blockdev_do_action(&action, errp);
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001281}
1282
Wenchao Xia44e3e052013-09-11 14:04:36 +08001283SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1284 bool has_id,
1285 const char *id,
1286 bool has_name,
1287 const char *name,
1288 Error **errp)
1289{
Fam Zhenga0e85442015-03-02 19:36:48 +08001290 BlockDriverState *bs;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001291 AioContext *aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001292 QEMUSnapshotInfo sn;
1293 Error *local_err = NULL;
1294 SnapshotInfo *info = NULL;
1295 int ret;
1296
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001297 bs = qmp_get_root_bs(device, errp);
1298 if (!bs) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001299 return NULL;
1300 }
Kevin Wolf2dfb4c02016-06-23 14:20:24 +02001301 aio_context = bdrv_get_aio_context(bs);
Max Reitz5433c242015-10-19 17:53:29 +02001302 aio_context_acquire(aio_context);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001303
1304 if (!has_id) {
1305 id = NULL;
1306 }
1307
1308 if (!has_name) {
1309 name = NULL;
1310 }
1311
1312 if (!id && !name) {
1313 error_setg(errp, "Name or id must be provided");
Max Reitz5433c242015-10-19 17:53:29 +02001314 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001315 }
1316
Stefan Hajnoczi0b928852014-11-19 14:19:43 +00001317 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1318 goto out_aio_context;
1319 }
1320
Wenchao Xia44e3e052013-09-11 14:04:36 +08001321 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001322 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001323 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001324 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001325 }
1326 if (!ret) {
1327 error_setg(errp,
1328 "Snapshot with id '%s' and name '%s' does not exist on "
1329 "device '%s'",
1330 STR_OR_NULL(id), STR_OR_NULL(name), device);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001331 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001332 }
1333
1334 bdrv_snapshot_delete(bs, id, name, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001335 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001336 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001337 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001338 }
1339
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001340 aio_context_release(aio_context);
1341
Markus Armbruster5839e532014-08-19 10:31:08 +02001342 info = g_new0(SnapshotInfo, 1);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001343 info->id = g_strdup(sn.id_str);
1344 info->name = g_strdup(sn.name);
1345 info->date_nsec = sn.date_nsec;
1346 info->date_sec = sn.date_sec;
1347 info->vm_state_size = sn.vm_state_size;
1348 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1349 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1350
1351 return info;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001352
1353out_aio_context:
1354 aio_context_release(aio_context);
1355 return NULL;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001356}
Jeff Cody8802d1f2012-02-28 15:54:06 -05001357
John Snow341ebc22015-04-17 19:49:52 -04001358/**
1359 * block_dirty_bitmap_lookup:
1360 * Return a dirty bitmap (if present), after validating
1361 * the node reference and bitmap names.
1362 *
1363 * @node: The name of the BDS node to search for bitmaps
1364 * @name: The name of the bitmap to search for
1365 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1366 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1367 * @errp: Output pointer for error information. Can be NULL.
1368 *
1369 * @return: A bitmap object on success, or NULL on failure.
1370 */
1371static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1372 const char *name,
1373 BlockDriverState **pbs,
John Snow341ebc22015-04-17 19:49:52 -04001374 Error **errp)
1375{
1376 BlockDriverState *bs;
1377 BdrvDirtyBitmap *bitmap;
John Snow341ebc22015-04-17 19:49:52 -04001378
1379 if (!node) {
1380 error_setg(errp, "Node cannot be NULL");
1381 return NULL;
1382 }
1383 if (!name) {
1384 error_setg(errp, "Bitmap name cannot be NULL");
1385 return NULL;
1386 }
1387 bs = bdrv_lookup_bs(node, node, NULL);
1388 if (!bs) {
1389 error_setg(errp, "Node '%s' not found", node);
1390 return NULL;
1391 }
1392
John Snow341ebc22015-04-17 19:49:52 -04001393 bitmap = bdrv_find_dirty_bitmap(bs, name);
1394 if (!bitmap) {
1395 error_setg(errp, "Dirty bitmap '%s' not found", name);
Paolo Bonzini21198822017-06-05 14:39:03 +02001396 return NULL;
John Snow341ebc22015-04-17 19:49:52 -04001397 }
1398
1399 if (pbs) {
1400 *pbs = bs;
1401 }
John Snow341ebc22015-04-17 19:49:52 -04001402
1403 return bitmap;
John Snow341ebc22015-04-17 19:49:52 -04001404}
1405
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00001406/* New and old BlockDriverState structs for atomic group operations */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001407
John Snow50f43f02015-11-05 18:13:09 -05001408typedef struct BlkActionState BlkActionState;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001409
John Snow50f43f02015-11-05 18:13:09 -05001410/**
1411 * BlkActionOps:
1412 * Table of operations that define an Action.
1413 *
1414 * @instance_size: Size of state struct, in bytes.
1415 * @prepare: Prepare the work, must NOT be NULL.
1416 * @commit: Commit the changes, can be NULL.
1417 * @abort: Abort the changes on fail, can be NULL.
1418 * @clean: Clean up resources after all transaction actions have called
1419 * commit() or abort(). Can be NULL.
1420 *
1421 * Only prepare() may fail. In a single transaction, only one of commit() or
1422 * abort() will be called. clean() will always be called if it is present.
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001423 */
John Snow50f43f02015-11-05 18:13:09 -05001424typedef struct BlkActionOps {
1425 size_t instance_size;
1426 void (*prepare)(BlkActionState *common, Error **errp);
1427 void (*commit)(BlkActionState *common);
1428 void (*abort)(BlkActionState *common);
1429 void (*clean)(BlkActionState *common);
1430} BlkActionOps;
1431
1432/**
1433 * BlkActionState:
1434 * Describes one Action's state within a Transaction.
1435 *
1436 * @action: QAPI-defined enum identifying which Action to perform.
1437 * @ops: Table of ActionOps this Action can perform.
John Snow94d16a62015-11-05 18:13:18 -05001438 * @block_job_txn: Transaction which this action belongs to.
John Snow50f43f02015-11-05 18:13:09 -05001439 * @entry: List membership for all Actions in this Transaction.
1440 *
1441 * This structure must be arranged as first member in a subclassed type,
1442 * assuming that the compiler will also arrange it to the same offsets as the
1443 * base class.
1444 */
1445struct BlkActionState {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001446 TransactionAction *action;
John Snow50f43f02015-11-05 18:13:09 -05001447 const BlkActionOps *ops;
John Snow94d16a62015-11-05 18:13:18 -05001448 BlockJobTxn *block_job_txn;
1449 TransactionProperties *txn_props;
John Snow50f43f02015-11-05 18:13:09 -05001450 QSIMPLEQ_ENTRY(BlkActionState) entry;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001451};
1452
Wenchao Xiabbe86012013-09-11 14:04:34 +08001453/* internal snapshot private data */
1454typedef struct InternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001455 BlkActionState common;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001456 BlockDriverState *bs;
1457 QEMUSnapshotInfo sn;
Fam Zheng507306c2015-10-23 11:08:13 +08001458 bool created;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001459} InternalSnapshotState;
1460
John Snow94d16a62015-11-05 18:13:18 -05001461
1462static int action_check_completion_mode(BlkActionState *s, Error **errp)
1463{
1464 if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
1465 error_setg(errp,
1466 "Action '%s' does not support Transaction property "
1467 "completion-mode = %s",
Markus Armbruster977c7362017-08-24 10:46:08 +02001468 TransactionActionKind_str(s->action->type),
1469 ActionCompletionMode_str(s->txn_props->completion_mode));
John Snow94d16a62015-11-05 18:13:18 -05001470 return -1;
1471 }
1472 return 0;
1473}
1474
John Snow50f43f02015-11-05 18:13:09 -05001475static void internal_snapshot_prepare(BlkActionState *common,
Wenchao Xiabbe86012013-09-11 14:04:34 +08001476 Error **errp)
1477{
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001478 Error *local_err = NULL;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001479 const char *device;
1480 const char *name;
1481 BlockDriverState *bs;
1482 QEMUSnapshotInfo old_sn, *sn;
1483 bool ret;
1484 qemu_timeval tv;
1485 BlockdevSnapshotInternal *internal;
1486 InternalSnapshotState *state;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001487 AioContext *aio_context;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001488 int ret1;
1489
Eric Blake6a8f9662015-10-26 16:34:54 -06001490 g_assert(common->action->type ==
Wenchao Xiabbe86012013-09-11 14:04:34 +08001491 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
Eric Blake32bafa82016-03-17 16:48:37 -06001492 internal = common->action->u.blockdev_snapshot_internal_sync.data;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001493 state = DO_UPCAST(InternalSnapshotState, common, common);
1494
1495 /* 1. parse input */
1496 device = internal->device;
1497 name = internal->name;
1498
1499 /* 2. check for validation */
John Snow94d16a62015-11-05 18:13:18 -05001500 if (action_check_completion_mode(common, errp) < 0) {
1501 return;
1502 }
1503
Kevin Wolf75dfd402016-06-23 14:20:24 +02001504 bs = qmp_get_root_bs(device, errp);
1505 if (!bs) {
Wenchao Xiabbe86012013-09-11 14:04:34 +08001506 return;
1507 }
1508
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001509 aio_context = bdrv_get_aio_context(bs);
1510 aio_context_acquire(aio_context);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001511
Fam Zheng507306c2015-10-23 11:08:13 +08001512 state->bs = bs;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001513
1514 /* Paired with .clean() */
Fam Zheng507306c2015-10-23 11:08:13 +08001515 bdrv_drained_begin(bs);
1516
Stefan Hajnoczi3dc7ca32014-11-21 10:49:00 +00001517 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001518 goto out;
Stefan Hajnoczi3dc7ca32014-11-21 10:49:00 +00001519 }
1520
Wenchao Xiabbe86012013-09-11 14:04:34 +08001521 if (bdrv_is_read_only(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001522 error_setg(errp, "Device '%s' is read only", device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001523 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001524 }
1525
1526 if (!bdrv_can_snapshot(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001527 error_setg(errp, "Block format '%s' used by device '%s' "
1528 "does not support internal snapshots",
1529 bs->drv->format_name, device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001530 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001531 }
1532
1533 if (!strlen(name)) {
1534 error_setg(errp, "Name is empty");
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001535 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001536 }
1537
1538 /* check whether a snapshot with name exist */
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001539 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1540 &local_err);
1541 if (local_err) {
1542 error_propagate(errp, local_err);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001543 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001544 } else if (ret) {
1545 error_setg(errp,
1546 "Snapshot with name '%s' already exists on device '%s'",
1547 name, device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001548 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001549 }
1550
1551 /* 3. take the snapshot */
1552 sn = &state->sn;
1553 pstrcpy(sn->name, sizeof(sn->name), name);
1554 qemu_gettimeofday(&tv);
1555 sn->date_sec = tv.tv_sec;
1556 sn->date_nsec = tv.tv_usec * 1000;
1557 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1558
1559 ret1 = bdrv_snapshot_create(bs, sn);
1560 if (ret1 < 0) {
1561 error_setg_errno(errp, -ret1,
1562 "Failed to create snapshot '%s' on device '%s'",
1563 name, device);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001564 goto out;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001565 }
1566
1567 /* 4. succeed, mark a snapshot is created */
Fam Zheng507306c2015-10-23 11:08:13 +08001568 state->created = true;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001569
1570out:
1571 aio_context_release(aio_context);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001572}
1573
John Snow50f43f02015-11-05 18:13:09 -05001574static void internal_snapshot_abort(BlkActionState *common)
Wenchao Xiabbe86012013-09-11 14:04:34 +08001575{
1576 InternalSnapshotState *state =
1577 DO_UPCAST(InternalSnapshotState, common, common);
1578 BlockDriverState *bs = state->bs;
1579 QEMUSnapshotInfo *sn = &state->sn;
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001580 AioContext *aio_context;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001581 Error *local_error = NULL;
1582
Fam Zheng507306c2015-10-23 11:08:13 +08001583 if (!state->created) {
Wenchao Xiabbe86012013-09-11 14:04:34 +08001584 return;
1585 }
1586
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001587 aio_context = bdrv_get_aio_context(state->bs);
1588 aio_context_acquire(aio_context);
1589
Wenchao Xiabbe86012013-09-11 14:04:34 +08001590 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
Markus Armbrusterc29b77f2015-12-18 16:35:14 +01001591 error_reportf_err(local_error,
1592 "Failed to delete snapshot with id '%s' and "
1593 "name '%s' on device '%s' in abort: ",
1594 sn->id_str, sn->name,
1595 bdrv_get_device_name(bs));
Wenchao Xiabbe86012013-09-11 14:04:34 +08001596 }
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001597
1598 aio_context_release(aio_context);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001599}
1600
John Snow50f43f02015-11-05 18:13:09 -05001601static void internal_snapshot_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001602{
1603 InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
1604 common, common);
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001605 AioContext *aio_context;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001606
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001607 if (!state->bs) {
1608 return;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001609 }
Stefan Hajnoczia36e4582017-12-06 14:45:46 +00001610
1611 aio_context = bdrv_get_aio_context(state->bs);
1612 aio_context_acquire(aio_context);
1613
1614 bdrv_drained_end(state->bs);
1615
1616 aio_context_release(aio_context);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001617}
1618
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001619/* external snapshot private data */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001620typedef struct ExternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001621 BlkActionState common;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001622 BlockDriverState *old_bs;
1623 BlockDriverState *new_bs;
Kevin Wolf067acf22017-03-02 15:26:18 +01001624 bool overlay_appended;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001625} ExternalSnapshotState;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001626
John Snow50f43f02015-11-05 18:13:09 -05001627static void external_snapshot_prepare(BlkActionState *common,
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001628 Error **errp)
1629{
Max Reitz5b363932016-05-17 16:41:31 +02001630 int flags = 0;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001631 QDict *options = NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001632 Error *local_err = NULL;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001633 /* Device and node name of the image to generate the snapshot from */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001634 const char *device;
Benoît Canet0901f672014-01-23 21:31:38 +01001635 const char *node_name;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001636 /* Reference to the new image (for 'blockdev-snapshot') */
1637 const char *snapshot_ref;
1638 /* File name of the new image (for 'blockdev-snapshot-sync') */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001639 const char *new_image_file;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001640 ExternalSnapshotState *state =
1641 DO_UPCAST(ExternalSnapshotState, common, common);
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001642 TransactionAction *action = common->action;
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001643 AioContext *aio_context;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001644
Alberto Garcia43de7e22015-10-26 14:27:16 +02001645 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1646 * purpose but a different set of parameters */
1647 switch (action->type) {
1648 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
1649 {
Eric Blake32bafa82016-03-17 16:48:37 -06001650 BlockdevSnapshot *s = action->u.blockdev_snapshot.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001651 device = s->node;
1652 node_name = s->node;
1653 new_image_file = NULL;
1654 snapshot_ref = s->overlay;
1655 }
1656 break;
1657 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
1658 {
Eric Blake32bafa82016-03-17 16:48:37 -06001659 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001660 device = s->has_device ? s->device : NULL;
1661 node_name = s->has_node_name ? s->node_name : NULL;
1662 new_image_file = s->snapshot_file;
1663 snapshot_ref = NULL;
1664 }
1665 break;
1666 default:
1667 g_assert_not_reached();
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001668 }
1669
1670 /* start processing */
John Snow94d16a62015-11-05 18:13:18 -05001671 if (action_check_completion_mode(common, errp) < 0) {
1672 return;
1673 }
1674
Alberto Garcia43de7e22015-10-26 14:27:16 +02001675 state->old_bs = bdrv_lookup_bs(device, node_name, errp);
1676 if (!state->old_bs) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001677 return;
1678 }
1679
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001680 aio_context = bdrv_get_aio_context(state->old_bs);
1681 aio_context_acquire(aio_context);
1682
1683 /* Paired with .clean() */
Fam Zhengda763e82015-10-23 11:08:10 +08001684 bdrv_drained_begin(state->old_bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001685
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001686 if (!bdrv_is_inserted(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001687 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001688 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001689 }
1690
Fam Zheng3718d8a2014-05-23 21:29:43 +08001691 if (bdrv_op_is_blocked(state->old_bs,
1692 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001693 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001694 }
1695
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001696 if (!bdrv_is_read_only(state->old_bs)) {
1697 if (bdrv_flush(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001698 error_setg(errp, QERR_IO_ERROR);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001699 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001700 }
1701 }
1702
Benoît Canet212a5a82014-01-23 21:31:36 +01001703 if (!bdrv_is_first_non_filter(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001704 error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001705 goto out;
Benoît Canetf6186f42013-10-02 14:33:48 +02001706 }
1707
Alberto Garcia43de7e22015-10-26 14:27:16 +02001708 if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
Eric Blake32bafa82016-03-17 16:48:37 -06001709 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001710 const char *format = s->has_format ? s->format : "qcow2";
1711 enum NewImageMode mode;
1712 const char *snapshot_node_name =
1713 s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001714
Alberto Garcia43de7e22015-10-26 14:27:16 +02001715 if (node_name && !snapshot_node_name) {
1716 error_setg(errp, "New snapshot node name missing");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001717 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001718 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001719
1720 if (snapshot_node_name &&
1721 bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
1722 error_setg(errp, "New snapshot node name already in use");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001723 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001724 }
1725
1726 flags = state->old_bs->open_flags;
John Snow2a32c6e2017-07-17 20:34:21 -04001727 flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_COPY_ON_READ);
1728 flags |= BDRV_O_NO_BACKING;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001729
1730 /* create new image w/backing file */
1731 mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1732 if (mode != NEW_IMAGE_MODE_EXISTING) {
Kevin Wolff86b8b52016-03-02 12:16:44 +01001733 int64_t size = bdrv_getlength(state->old_bs);
1734 if (size < 0) {
1735 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001736 goto out;
Kevin Wolff86b8b52016-03-02 12:16:44 +01001737 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001738 bdrv_img_create(new_image_file, format,
1739 state->old_bs->filename,
1740 state->old_bs->drv->format_name,
Fam Zheng92172832017-04-21 20:27:01 +08001741 NULL, size, flags, false, &local_err);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001742 if (local_err) {
1743 error_propagate(errp, local_err);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001744 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001745 }
1746 }
1747
1748 options = qdict_new();
1749 if (s->has_snapshot_node_name) {
Eric Blake46f5ac22017-04-27 16:58:17 -05001750 qdict_put_str(options, "node-name", snapshot_node_name);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001751 }
Eric Blake46f5ac22017-04-27 16:58:17 -05001752 qdict_put_str(options, "driver", format);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001753 }
1754
Max Reitz5b363932016-05-17 16:41:31 +02001755 state->new_bs = bdrv_open(new_image_file, snapshot_ref, options, flags,
1756 errp);
Max Reitzf67503e2014-02-18 18:33:05 +01001757 /* We will manually add the backing_hd field to the bs later */
Max Reitz5b363932016-05-17 16:41:31 +02001758 if (!state->new_bs) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001759 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001760 }
1761
Kevin Wolf1f0c4612016-03-22 18:38:44 +01001762 if (bdrv_has_blk(state->new_bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02001763 error_setg(errp, "The snapshot is already in use");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001764 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001765 }
1766
1767 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1768 errp)) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001769 goto out;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001770 }
1771
1772 if (state->new_bs->backing != NULL) {
1773 error_setg(errp, "The snapshot already has a backing image");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001774 goto out;
Alberto Garcia08b24cf2015-11-03 12:32:35 +02001775 }
1776
1777 if (!state->new_bs->drv->supports_backing) {
1778 error_setg(errp, "The snapshot does not support backing images");
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001779 goto out;
Kevin Wolfb2c28322017-02-20 12:46:42 +01001780 }
1781
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001782 bdrv_set_aio_context(state->new_bs, aio_context);
Fam Zhengc26a5ab2017-04-07 14:54:09 +08001783
Kevin Wolfb2c28322017-02-20 12:46:42 +01001784 /* This removes our old bs and adds the new bs. This is an operation that
1785 * can fail, so we need to do it in .prepare; undoing it for abort is
1786 * always possible. */
1787 bdrv_ref(state->new_bs);
1788 bdrv_append(state->new_bs, state->old_bs, &local_err);
1789 if (local_err) {
1790 error_propagate(errp, local_err);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001791 goto out;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001792 }
Kevin Wolf067acf22017-03-02 15:26:18 +01001793 state->overlay_appended = true;
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001794
1795out:
1796 aio_context_release(aio_context);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001797}
1798
John Snow50f43f02015-11-05 18:13:09 -05001799static void external_snapshot_commit(BlkActionState *common)
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001800{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001801 ExternalSnapshotState *state =
1802 DO_UPCAST(ExternalSnapshotState, common, common);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001803 AioContext *aio_context;
1804
1805 aio_context = bdrv_get_aio_context(state->old_bs);
1806 aio_context_acquire(aio_context);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001807
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001808 /* We don't need (or want) to use the transactional
1809 * bdrv_reopen_multiple() across all the entries at once, because we
1810 * don't want to abort all of them if one of them fails the reopen */
Paolo Bonzinid3faa132017-06-05 14:38:50 +02001811 if (!atomic_read(&state->old_bs->copy_on_read)) {
Kevin Wolf4c844982016-02-29 13:12:26 +01001812 bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
1813 NULL);
1814 }
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001815
1816 aio_context_release(aio_context);
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001817}
1818
John Snow50f43f02015-11-05 18:13:09 -05001819static void external_snapshot_abort(BlkActionState *common)
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001820{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001821 ExternalSnapshotState *state =
1822 DO_UPCAST(ExternalSnapshotState, common, common);
1823 if (state->new_bs) {
Kevin Wolf067acf22017-03-02 15:26:18 +01001824 if (state->overlay_appended) {
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001825 AioContext *aio_context;
1826
1827 aio_context = bdrv_get_aio_context(state->old_bs);
1828 aio_context_acquire(aio_context);
1829
Jeff Cody719fc282017-06-07 09:55:22 -04001830 bdrv_ref(state->old_bs); /* we can't let bdrv_set_backind_hd()
1831 close state->old_bs; we need it */
1832 bdrv_set_backing_hd(state->new_bs, NULL, &error_abort);
Kevin Wolf5fe31c22017-03-06 16:20:51 +01001833 bdrv_replace_node(state->new_bs, state->old_bs, &error_abort);
Jeff Cody719fc282017-06-07 09:55:22 -04001834 bdrv_unref(state->old_bs); /* bdrv_replace_node() ref'ed old_bs */
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001835
1836 aio_context_release(aio_context);
Kevin Wolfb2c28322017-02-20 12:46:42 +01001837 }
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001838 }
Fam Zhengda763e82015-10-23 11:08:10 +08001839}
1840
John Snow50f43f02015-11-05 18:13:09 -05001841static void external_snapshot_clean(BlkActionState *common)
Fam Zhengda763e82015-10-23 11:08:10 +08001842{
1843 ExternalSnapshotState *state =
1844 DO_UPCAST(ExternalSnapshotState, common, common);
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001845 AioContext *aio_context;
1846
1847 if (!state->old_bs) {
1848 return;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001849 }
Stefan Hajnoczi2d24b602017-12-06 14:45:43 +00001850
1851 aio_context = bdrv_get_aio_context(state->old_bs);
1852 aio_context_acquire(aio_context);
1853
1854 bdrv_drained_end(state->old_bs);
1855 bdrv_unref(state->new_bs);
1856
1857 aio_context_release(aio_context);
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001858}
1859
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001860typedef struct DriveBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001861 BlkActionState common;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001862 BlockDriverState *bs;
1863 BlockJob *job;
1864} DriveBackupState;
1865
John Snow111049a2016-11-08 01:50:38 -05001866static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
Pavel Butsykin81206a82016-07-22 11:17:50 +03001867 Error **errp);
John Snow78f51fd2015-11-05 18:13:17 -05001868
John Snow50f43f02015-11-05 18:13:09 -05001869static void drive_backup_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001870{
1871 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001872 BlockDriverState *bs;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001873 DriveBackup *backup;
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001874 AioContext *aio_context;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001875 Error *local_err = NULL;
1876
Eric Blake6a8f9662015-10-26 16:34:54 -06001877 assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001878 backup = common->action->u.drive_backup.data;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001879
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001880 bs = qmp_get_root_bs(backup->device, errp);
1881 if (!bs) {
Fam Zheng1fdd4b72015-10-23 11:08:11 +08001882 return;
1883 }
1884
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001885 aio_context = bdrv_get_aio_context(bs);
1886 aio_context_acquire(aio_context);
1887
1888 /* Paired with .clean() */
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001889 bdrv_drained_begin(bs);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001890
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02001891 state->bs = bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001892
John Snow111049a2016-11-08 01:50:38 -05001893 state->job = do_drive_backup(backup, common->block_job_txn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001894 if (local_err) {
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001895 error_propagate(errp, local_err);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001896 goto out;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001897 }
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001898
1899out:
1900 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05001901}
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001902
John Snow111049a2016-11-08 01:50:38 -05001903static void drive_backup_commit(BlkActionState *common)
1904{
1905 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001906 AioContext *aio_context;
1907
1908 aio_context = bdrv_get_aio_context(state->bs);
1909 aio_context_acquire(aio_context);
1910
John Snow111049a2016-11-08 01:50:38 -05001911 assert(state->job);
1912 block_job_start(state->job);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001913
1914 aio_context_release(aio_context);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001915}
1916
John Snow50f43f02015-11-05 18:13:09 -05001917static void drive_backup_abort(BlkActionState *common)
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001918{
1919 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001920
John Snow111049a2016-11-08 01:50:38 -05001921 if (state->job) {
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001922 AioContext *aio_context;
1923
1924 aio_context = bdrv_get_aio_context(state->bs);
1925 aio_context_acquire(aio_context);
1926
John Snow111049a2016-11-08 01:50:38 -05001927 block_job_cancel_sync(state->job);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001928
1929 aio_context_release(aio_context);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001930 }
1931}
1932
John Snow50f43f02015-11-05 18:13:09 -05001933static void drive_backup_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001934{
1935 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001936 AioContext *aio_context;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001937
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001938 if (!state->bs) {
1939 return;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001940 }
Stefan Hajnoczi66d56052017-12-06 14:45:44 +00001941
1942 aio_context = bdrv_get_aio_context(state->bs);
1943 aio_context_acquire(aio_context);
1944
1945 bdrv_drained_end(state->bs);
1946
1947 aio_context_release(aio_context);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001948}
1949
Fam Zhengbd8baec2014-12-18 18:37:06 +08001950typedef struct BlockdevBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001951 BlkActionState common;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001952 BlockDriverState *bs;
1953 BlockJob *job;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001954} BlockdevBackupState;
1955
John Snow111049a2016-11-08 01:50:38 -05001956static BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
1957 Error **errp);
John Snow78f51fd2015-11-05 18:13:17 -05001958
John Snow50f43f02015-11-05 18:13:09 -05001959static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001960{
1961 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1962 BlockdevBackup *backup;
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001963 BlockDriverState *bs, *target;
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001964 AioContext *aio_context;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001965 Error *local_err = NULL;
1966
Eric Blake6a8f9662015-10-26 16:34:54 -06001967 assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001968 backup = common->action->u.blockdev_backup.data;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001969
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001970 bs = qmp_get_root_bs(backup->device, errp);
1971 if (!bs) {
Fam Zhengff52bf32015-10-23 11:08:12 +08001972 return;
1973 }
1974
Kevin Wolf39d990a2016-08-02 19:22:04 +02001975 target = bdrv_lookup_bs(backup->target, backup->target, errp);
Max Reitz5433c242015-10-19 17:53:29 +02001976 if (!target) {
Fam Zhengbd8baec2014-12-18 18:37:06 +08001977 return;
1978 }
1979
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001980 aio_context = bdrv_get_aio_context(bs);
1981 if (aio_context != bdrv_get_aio_context(target)) {
Fam Zhengbd8baec2014-12-18 18:37:06 +08001982 error_setg(errp, "Backup between two IO threads is not implemented");
1983 return;
1984 }
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001985 aio_context_acquire(aio_context);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02001986 state->bs = bs;
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001987
1988 /* Paired with .clean() */
Fam Zhengff52bf32015-10-23 11:08:12 +08001989 bdrv_drained_begin(state->bs);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001990
John Snow111049a2016-11-08 01:50:38 -05001991 state->job = do_blockdev_backup(backup, common->block_job_txn, &local_err);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001992 if (local_err) {
1993 error_propagate(errp, local_err);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001994 goto out;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001995 }
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00001996
1997out:
1998 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05001999}
Fam Zhengbd8baec2014-12-18 18:37:06 +08002000
John Snow111049a2016-11-08 01:50:38 -05002001static void blockdev_backup_commit(BlkActionState *common)
2002{
2003 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00002004 AioContext *aio_context;
2005
2006 aio_context = bdrv_get_aio_context(state->bs);
2007 aio_context_acquire(aio_context);
2008
John Snow111049a2016-11-08 01:50:38 -05002009 assert(state->job);
2010 block_job_start(state->job);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00002011
2012 aio_context_release(aio_context);
Fam Zhengbd8baec2014-12-18 18:37:06 +08002013}
2014
John Snow50f43f02015-11-05 18:13:09 -05002015static void blockdev_backup_abort(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08002016{
2017 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
Fam Zhengbd8baec2014-12-18 18:37:06 +08002018
John Snow111049a2016-11-08 01:50:38 -05002019 if (state->job) {
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00002020 AioContext *aio_context;
2021
2022 aio_context = bdrv_get_aio_context(state->bs);
2023 aio_context_acquire(aio_context);
2024
John Snow111049a2016-11-08 01:50:38 -05002025 block_job_cancel_sync(state->job);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00002026
2027 aio_context_release(aio_context);
Fam Zhengbd8baec2014-12-18 18:37:06 +08002028 }
2029}
2030
John Snow50f43f02015-11-05 18:13:09 -05002031static void blockdev_backup_clean(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08002032{
2033 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00002034 AioContext *aio_context;
Fam Zhengbd8baec2014-12-18 18:37:06 +08002035
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00002036 if (!state->bs) {
2037 return;
Fam Zhengbd8baec2014-12-18 18:37:06 +08002038 }
Stefan Hajnocziedd5ade2017-12-06 14:45:45 +00002039
2040 aio_context = bdrv_get_aio_context(state->bs);
2041 aio_context_acquire(aio_context);
2042
2043 bdrv_drained_end(state->bs);
2044
2045 aio_context_release(aio_context);
Fam Zhengbd8baec2014-12-18 18:37:06 +08002046}
2047
Fam Zhengdf9a6812015-11-09 18:16:54 +08002048typedef struct BlockDirtyBitmapState {
John Snow50f43f02015-11-05 18:13:09 -05002049 BlkActionState common;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002050 BdrvDirtyBitmap *bitmap;
2051 BlockDriverState *bs;
2052 AioContext *aio_context;
2053 HBitmap *backup;
2054 bool prepared;
2055} BlockDirtyBitmapState;
2056
John Snow50f43f02015-11-05 18:13:09 -05002057static void block_dirty_bitmap_add_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002058 Error **errp)
2059{
2060 Error *local_err = NULL;
2061 BlockDirtyBitmapAdd *action;
2062 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2063 common, common);
2064
John Snow94d16a62015-11-05 18:13:18 -05002065 if (action_check_completion_mode(common, errp) < 0) {
2066 return;
2067 }
2068
Eric Blake32bafa82016-03-17 16:48:37 -06002069 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002070 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
2071 qmp_block_dirty_bitmap_add(action->node, action->name,
2072 action->has_granularity, action->granularity,
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002073 action->has_persistent, action->persistent,
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002074 action->has_autoload, action->autoload,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002075 &local_err);
2076
2077 if (!local_err) {
2078 state->prepared = true;
2079 } else {
2080 error_propagate(errp, local_err);
2081 }
2082}
2083
John Snow50f43f02015-11-05 18:13:09 -05002084static void block_dirty_bitmap_add_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002085{
2086 BlockDirtyBitmapAdd *action;
2087 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2088 common, common);
2089
Eric Blake32bafa82016-03-17 16:48:37 -06002090 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002091 /* Should not be able to fail: IF the bitmap was added via .prepare(),
2092 * then the node reference and bitmap name must have been valid.
2093 */
2094 if (state->prepared) {
2095 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
2096 }
2097}
2098
John Snow50f43f02015-11-05 18:13:09 -05002099static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002100 Error **errp)
2101{
2102 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2103 common, common);
2104 BlockDirtyBitmap *action;
2105
John Snow94d16a62015-11-05 18:13:18 -05002106 if (action_check_completion_mode(common, errp) < 0) {
2107 return;
2108 }
2109
Eric Blake32bafa82016-03-17 16:48:37 -06002110 action = common->action->u.block_dirty_bitmap_clear.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002111 state->bitmap = block_dirty_bitmap_lookup(action->node,
2112 action->name,
2113 &state->bs,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002114 errp);
2115 if (!state->bitmap) {
2116 return;
2117 }
2118
2119 if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
2120 error_setg(errp, "Cannot modify a frozen bitmap");
2121 return;
2122 } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
2123 error_setg(errp, "Cannot clear a disabled bitmap");
2124 return;
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002125 } else if (bdrv_dirty_bitmap_readonly(state->bitmap)) {
2126 error_setg(errp, "Cannot clear a readonly bitmap");
2127 return;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002128 }
2129
2130 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
2131 /* AioContext is released in .clean() */
2132}
2133
John Snow50f43f02015-11-05 18:13:09 -05002134static void block_dirty_bitmap_clear_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002135{
2136 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2137 common, common);
2138
John Snow184dd9c2017-03-15 17:28:11 -04002139 if (state->backup) {
2140 bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
2141 }
Fam Zhengdf9a6812015-11-09 18:16:54 +08002142}
2143
John Snow50f43f02015-11-05 18:13:09 -05002144static void block_dirty_bitmap_clear_commit(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002145{
2146 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2147 common, common);
2148
2149 hbitmap_free(state->backup);
2150}
2151
John Snow50f43f02015-11-05 18:13:09 -05002152static void block_dirty_bitmap_clear_clean(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002153{
2154 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2155 common, common);
2156
2157 if (state->aio_context) {
2158 aio_context_release(state->aio_context);
2159 }
2160}
2161
John Snow50f43f02015-11-05 18:13:09 -05002162static void abort_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002163{
2164 error_setg(errp, "Transaction aborted using Abort action");
2165}
2166
John Snow50f43f02015-11-05 18:13:09 -05002167static void abort_commit(BlkActionState *common)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002168{
Stefan Weildfc6f862013-07-25 18:21:28 +02002169 g_assert_not_reached(); /* this action never succeeds */
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002170}
2171
John Snow50f43f02015-11-05 18:13:09 -05002172static const BlkActionOps actions[] = {
Alberto Garcia43de7e22015-10-26 14:27:16 +02002173 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2174 .instance_size = sizeof(ExternalSnapshotState),
2175 .prepare = external_snapshot_prepare,
2176 .commit = external_snapshot_commit,
2177 .abort = external_snapshot_abort,
Alberto Garcia4ad6f3d2015-11-13 15:00:24 +02002178 .clean = external_snapshot_clean,
Alberto Garcia43de7e22015-10-26 14:27:16 +02002179 },
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002180 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002181 .instance_size = sizeof(ExternalSnapshotState),
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002182 .prepare = external_snapshot_prepare,
2183 .commit = external_snapshot_commit,
2184 .abort = external_snapshot_abort,
Fam Zhengda763e82015-10-23 11:08:10 +08002185 .clean = external_snapshot_clean,
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002186 },
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002187 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2188 .instance_size = sizeof(DriveBackupState),
2189 .prepare = drive_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002190 .commit = drive_backup_commit,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002191 .abort = drive_backup_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002192 .clean = drive_backup_clean,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002193 },
Fam Zhengbd8baec2014-12-18 18:37:06 +08002194 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2195 .instance_size = sizeof(BlockdevBackupState),
2196 .prepare = blockdev_backup_prepare,
John Snow111049a2016-11-08 01:50:38 -05002197 .commit = blockdev_backup_commit,
Fam Zhengbd8baec2014-12-18 18:37:06 +08002198 .abort = blockdev_backup_abort,
2199 .clean = blockdev_backup_clean,
2200 },
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002201 [TRANSACTION_ACTION_KIND_ABORT] = {
John Snow50f43f02015-11-05 18:13:09 -05002202 .instance_size = sizeof(BlkActionState),
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002203 .prepare = abort_prepare,
2204 .commit = abort_commit,
2205 },
Wenchao Xiabbe86012013-09-11 14:04:34 +08002206 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2207 .instance_size = sizeof(InternalSnapshotState),
2208 .prepare = internal_snapshot_prepare,
2209 .abort = internal_snapshot_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002210 .clean = internal_snapshot_clean,
Wenchao Xiabbe86012013-09-11 14:04:34 +08002211 },
Fam Zhengdf9a6812015-11-09 18:16:54 +08002212 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2213 .instance_size = sizeof(BlockDirtyBitmapState),
2214 .prepare = block_dirty_bitmap_add_prepare,
2215 .abort = block_dirty_bitmap_add_abort,
2216 },
2217 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2218 .instance_size = sizeof(BlockDirtyBitmapState),
2219 .prepare = block_dirty_bitmap_clear_prepare,
2220 .commit = block_dirty_bitmap_clear_commit,
2221 .abort = block_dirty_bitmap_clear_abort,
2222 .clean = block_dirty_bitmap_clear_clean,
2223 }
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002224};
2225
John Snow94d16a62015-11-05 18:13:18 -05002226/**
2227 * Allocate a TransactionProperties structure if necessary, and fill
2228 * that structure with desired defaults if they are unset.
2229 */
2230static TransactionProperties *get_transaction_properties(
2231 TransactionProperties *props)
2232{
2233 if (!props) {
2234 props = g_new0(TransactionProperties, 1);
2235 }
2236
2237 if (!props->has_completion_mode) {
2238 props->has_completion_mode = true;
2239 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2240 }
2241
2242 return props;
2243}
2244
Jeff Cody8802d1f2012-02-28 15:54:06 -05002245/*
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002246 * 'Atomic' group operations. The operations are performed as a set, and if
2247 * any fail then we roll back all operations in the group.
Jeff Cody8802d1f2012-02-28 15:54:06 -05002248 */
John Snow94d16a62015-11-05 18:13:18 -05002249void qmp_transaction(TransactionActionList *dev_list,
2250 bool has_props,
2251 struct TransactionProperties *props,
2252 Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -05002253{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002254 TransactionActionList *dev_entry = dev_list;
John Snow94d16a62015-11-05 18:13:18 -05002255 BlockJobTxn *block_job_txn = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002256 BlkActionState *state, *next;
Luiz Capitulino43e17042012-11-30 10:52:07 -02002257 Error *local_err = NULL;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002258
John Snow50f43f02015-11-05 18:13:09 -05002259 QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002260 QSIMPLEQ_INIT(&snap_bdrv_states);
2261
John Snow94d16a62015-11-05 18:13:18 -05002262 /* Does this transaction get canceled as a group on failure?
2263 * If not, we don't really need to make a BlockJobTxn.
2264 */
2265 props = get_transaction_properties(props);
2266 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
2267 block_job_txn = block_job_txn_new();
2268 }
2269
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002270 /* drain all i/o before any operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002271 bdrv_drain_all();
2272
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002273 /* We don't do anything in this loop that commits us to the operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002274 while (NULL != dev_entry) {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002275 TransactionAction *dev_info = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002276 const BlkActionOps *ops;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002277
Jeff Cody8802d1f2012-02-28 15:54:06 -05002278 dev_info = dev_entry->value;
2279 dev_entry = dev_entry->next;
2280
Eric Blake6a8f9662015-10-26 16:34:54 -06002281 assert(dev_info->type < ARRAY_SIZE(actions));
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002282
Eric Blake6a8f9662015-10-26 16:34:54 -06002283 ops = &actions[dev_info->type];
Max Reitzaa3fe712013-09-12 14:57:27 +02002284 assert(ops->instance_size > 0);
2285
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002286 state = g_malloc0(ops->instance_size);
2287 state->ops = ops;
2288 state->action = dev_info;
John Snow94d16a62015-11-05 18:13:18 -05002289 state->block_job_txn = block_job_txn;
2290 state->txn_props = props;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002291 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002292
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002293 state->ops->prepare(state, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002294 if (local_err) {
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002295 error_propagate(errp, local_err);
2296 goto delete_and_fail;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002297 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002298 }
2299
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002300 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02002301 if (state->ops->commit) {
2302 state->ops->commit(state);
2303 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002304 }
2305
2306 /* success */
2307 goto exit;
2308
2309delete_and_fail:
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002310 /* failure, and it is all-or-none; roll back all operations */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002311 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2312 if (state->ops->abort) {
2313 state->ops->abort(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002314 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002315 }
2316exit:
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002317 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
2318 if (state->ops->clean) {
2319 state->ops->clean(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002320 }
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002321 g_free(state);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002322 }
John Snow94d16a62015-11-05 18:13:18 -05002323 if (!has_props) {
2324 qapi_free_TransactionProperties(props);
2325 }
2326 block_job_txn_unref(block_job_txn);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002327}
2328
Kevin Wolffbe2d812016-09-20 13:38:46 +02002329void qmp_eject(bool has_device, const char *device,
2330 bool has_id, const char *id,
2331 bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002332{
Max Reitz38f54bd2015-10-26 21:39:12 +01002333 Error *local_err = NULL;
John Snow3a3086b2016-05-18 17:53:40 -04002334 int rc;
Markus Armbruster666daa62010-06-02 18:48:27 +02002335
John Snow3a3086b2016-05-18 17:53:40 -04002336 if (!has_force) {
2337 force = false;
2338 }
2339
Kevin Wolffbe2d812016-09-20 13:38:46 +02002340 rc = do_open_tray(has_device ? device : NULL,
2341 has_id ? id : NULL,
2342 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002343 if (rc && rc != -ENOSYS) {
Max Reitz38f54bd2015-10-26 21:39:12 +01002344 error_propagate(errp, local_err);
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02002345 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002346 }
Colin Lordbf18bee2016-06-06 14:15:22 -04002347 error_free(local_err);
John Snow3a3086b2016-05-18 17:53:40 -04002348
Kevin Wolffbe2d812016-09-20 13:38:46 +02002349 qmp_x_blockdev_remove_medium(has_device, device, has_id, id, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02002350}
2351
Benoît Canet12d3ba82014-01-23 21:31:35 +01002352void qmp_block_passwd(bool has_device, const char *device,
2353 bool has_node_name, const char *node_name,
2354 const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002355{
Daniel P. Berrangec01c2142017-06-23 17:24:16 +01002356 error_setg(errp,
2357 "Setting block passwords directly is no longer supported");
Markus Armbruster666daa62010-06-02 18:48:27 +02002358}
2359
Colin Lordbf18bee2016-06-06 14:15:22 -04002360/*
2361 * Attempt to open the tray of @device.
2362 * If @force, ignore its tray lock.
2363 * Else, if the tray is locked, don't open it, but ask the guest to open it.
2364 * On error, store an error through @errp and return -errno.
2365 * If @device does not exist, return -ENODEV.
2366 * If it has no removable media, return -ENOTSUP.
2367 * If it has no tray, return -ENOSYS.
2368 * If the guest was asked to open the tray, return -EINPROGRESS.
2369 * Else, return 0.
John Snow3a3086b2016-05-18 17:53:40 -04002370 */
Kevin Wolfb33945c2016-09-20 13:38:43 +02002371static int do_open_tray(const char *blk_name, const char *qdev_id,
2372 bool force, Error **errp)
Max Reitz7d8a9f72015-10-26 21:39:08 +01002373{
2374 BlockBackend *blk;
Kevin Wolfb33945c2016-09-20 13:38:43 +02002375 const char *device = qdev_id ?: blk_name;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002376 bool locked;
2377
Kevin Wolfb33945c2016-09-20 13:38:43 +02002378 blk = qmp_get_blk(blk_name, qdev_id, errp);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002379 if (!blk) {
John Snow3a3086b2016-05-18 17:53:40 -04002380 return -ENODEV;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002381 }
2382
2383 if (!blk_dev_has_removable_media(blk)) {
2384 error_setg(errp, "Device '%s' is not removable", device);
John Snow3a3086b2016-05-18 17:53:40 -04002385 return -ENOTSUP;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002386 }
2387
Max Reitz12c7ec82016-01-29 20:49:11 +01002388 if (!blk_dev_has_tray(blk)) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002389 error_setg(errp, "Device '%s' does not have a tray", device);
2390 return -ENOSYS;
Max Reitz12c7ec82016-01-29 20:49:11 +01002391 }
2392
Max Reitz7d8a9f72015-10-26 21:39:08 +01002393 if (blk_dev_is_tray_open(blk)) {
John Snow3a3086b2016-05-18 17:53:40 -04002394 return 0;
Max Reitz7d8a9f72015-10-26 21:39:08 +01002395 }
2396
2397 locked = blk_dev_is_medium_locked(blk);
2398 if (locked) {
2399 blk_dev_eject_request(blk, force);
2400 }
2401
2402 if (!locked || force) {
Kevin Wolf39829a02017-01-24 14:21:41 +01002403 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002404 }
John Snow3a3086b2016-05-18 17:53:40 -04002405
2406 if (locked && !force) {
Colin Lordbf18bee2016-06-06 14:15:22 -04002407 error_setg(errp, "Device '%s' is locked and force was not specified, "
2408 "wait for tray to open and try again", device);
2409 return -EINPROGRESS;
John Snow3a3086b2016-05-18 17:53:40 -04002410 }
2411
2412 return 0;
2413}
2414
Kevin Wolfb33945c2016-09-20 13:38:43 +02002415void qmp_blockdev_open_tray(bool has_device, const char *device,
2416 bool has_id, const char *id,
2417 bool has_force, bool force,
John Snow3a3086b2016-05-18 17:53:40 -04002418 Error **errp)
2419{
Colin Lordbf18bee2016-06-06 14:15:22 -04002420 Error *local_err = NULL;
2421 int rc;
2422
John Snow3a3086b2016-05-18 17:53:40 -04002423 if (!has_force) {
2424 force = false;
2425 }
Kevin Wolfb33945c2016-09-20 13:38:43 +02002426 rc = do_open_tray(has_device ? device : NULL,
2427 has_id ? id : NULL,
2428 force, &local_err);
Colin Lordbf18bee2016-06-06 14:15:22 -04002429 if (rc && rc != -ENOSYS && rc != -EINPROGRESS) {
2430 error_propagate(errp, local_err);
2431 return;
2432 }
2433 error_free(local_err);
Max Reitz7d8a9f72015-10-26 21:39:08 +01002434}
2435
Kevin Wolfb33945c2016-09-20 13:38:43 +02002436void qmp_blockdev_close_tray(bool has_device, const char *device,
2437 bool has_id, const char *id,
2438 Error **errp)
Max Reitzabaaf592015-10-26 21:39:09 +01002439{
2440 BlockBackend *blk;
Kevin Wolf39829a02017-01-24 14:21:41 +01002441 Error *local_err = NULL;
Max Reitzabaaf592015-10-26 21:39:09 +01002442
Kevin Wolfb33945c2016-09-20 13:38:43 +02002443 device = has_device ? device : NULL;
2444 id = has_id ? id : NULL;
2445
2446 blk = qmp_get_blk(device, id, errp);
Max Reitzabaaf592015-10-26 21:39:09 +01002447 if (!blk) {
Max Reitzabaaf592015-10-26 21:39:09 +01002448 return;
2449 }
2450
2451 if (!blk_dev_has_removable_media(blk)) {
Kevin Wolfb33945c2016-09-20 13:38:43 +02002452 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitzabaaf592015-10-26 21:39:09 +01002453 return;
2454 }
2455
Max Reitz12c7ec82016-01-29 20:49:11 +01002456 if (!blk_dev_has_tray(blk)) {
2457 /* Ignore this command on tray-less devices */
2458 return;
2459 }
2460
Max Reitzabaaf592015-10-26 21:39:09 +01002461 if (!blk_dev_is_tray_open(blk)) {
2462 return;
2463 }
2464
Kevin Wolf39829a02017-01-24 14:21:41 +01002465 blk_dev_change_media_cb(blk, true, &local_err);
2466 if (local_err) {
2467 error_propagate(errp, local_err);
2468 return;
2469 }
Max Reitzabaaf592015-10-26 21:39:09 +01002470}
2471
Kevin Wolf00949ba2016-09-20 13:38:45 +02002472void qmp_x_blockdev_remove_medium(bool has_device, const char *device,
2473 bool has_id, const char *id, Error **errp)
Max Reitz2814f672015-10-26 21:39:10 +01002474{
2475 BlockBackend *blk;
2476 BlockDriverState *bs;
2477 AioContext *aio_context;
Kevin Wolf00949ba2016-09-20 13:38:45 +02002478 bool has_attached_device;
Max Reitz2814f672015-10-26 21:39:10 +01002479
Kevin Wolf00949ba2016-09-20 13:38:45 +02002480 device = has_device ? device : NULL;
2481 id = has_id ? id : NULL;
2482
2483 blk = qmp_get_blk(device, id, errp);
Max Reitz2814f672015-10-26 21:39:10 +01002484 if (!blk) {
Max Reitz2814f672015-10-26 21:39:10 +01002485 return;
2486 }
2487
2488 /* For BBs without a device, we can exchange the BDS tree at will */
Kevin Wolf00949ba2016-09-20 13:38:45 +02002489 has_attached_device = blk_get_attached_dev(blk);
Max Reitz2814f672015-10-26 21:39:10 +01002490
Kevin Wolf00949ba2016-09-20 13:38:45 +02002491 if (has_attached_device && !blk_dev_has_removable_media(blk)) {
2492 error_setg(errp, "Device '%s' is not removable", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002493 return;
2494 }
2495
Kevin Wolf00949ba2016-09-20 13:38:45 +02002496 if (has_attached_device && blk_dev_has_tray(blk) &&
2497 !blk_dev_is_tray_open(blk))
2498 {
2499 error_setg(errp, "Tray of device '%s' is not open", device ?: id);
Max Reitz2814f672015-10-26 21:39:10 +01002500 return;
2501 }
2502
2503 bs = blk_bs(blk);
2504 if (!bs) {
2505 return;
2506 }
2507
2508 aio_context = bdrv_get_aio_context(bs);
2509 aio_context_acquire(aio_context);
2510
2511 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2512 goto out;
2513 }
2514
Max Reitz2814f672015-10-26 21:39:10 +01002515 blk_remove_bs(blk);
2516
Max Reitz12c7ec82016-01-29 20:49:11 +01002517 if (!blk_dev_has_tray(blk)) {
2518 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2519 * called at all); therefore, the medium needs to be ejected here.
2520 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2521 * value passed here (i.e. false). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002522 blk_dev_change_media_cb(blk, false, &error_abort);
Max Reitz12c7ec82016-01-29 20:49:11 +01002523 }
2524
Max Reitz2814f672015-10-26 21:39:10 +01002525out:
2526 aio_context_release(aio_context);
2527}
2528
Kevin Wolf716df212016-09-20 13:38:44 +02002529static void qmp_blockdev_insert_anon_medium(BlockBackend *blk,
Max Reitzd1299882015-10-26 21:39:11 +01002530 BlockDriverState *bs, Error **errp)
2531{
Kevin Wolf39829a02017-01-24 14:21:41 +01002532 Error *local_err = NULL;
Max Reitzd1299882015-10-26 21:39:11 +01002533 bool has_device;
Kevin Wolfd7086422017-01-13 19:02:32 +01002534 int ret;
Max Reitzd1299882015-10-26 21:39:11 +01002535
Max Reitzd1299882015-10-26 21:39:11 +01002536 /* For BBs without a device, we can exchange the BDS tree at will */
2537 has_device = blk_get_attached_dev(blk);
2538
2539 if (has_device && !blk_dev_has_removable_media(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002540 error_setg(errp, "Device is not removable");
Max Reitzd1299882015-10-26 21:39:11 +01002541 return;
2542 }
2543
Max Reitz12c7ec82016-01-29 20:49:11 +01002544 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002545 error_setg(errp, "Tray of the device is not open");
Max Reitzd1299882015-10-26 21:39:11 +01002546 return;
2547 }
2548
2549 if (blk_bs(blk)) {
Kevin Wolf716df212016-09-20 13:38:44 +02002550 error_setg(errp, "There already is a medium in the device");
Max Reitzd1299882015-10-26 21:39:11 +01002551 return;
2552 }
2553
Kevin Wolfd7086422017-01-13 19:02:32 +01002554 ret = blk_insert_bs(blk, bs, errp);
2555 if (ret < 0) {
2556 return;
2557 }
Max Reitzd1299882015-10-26 21:39:11 +01002558
Max Reitz12c7ec82016-01-29 20:49:11 +01002559 if (!blk_dev_has_tray(blk)) {
2560 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2561 * called at all); therefore, the medium needs to be pushed into the
2562 * slot here.
2563 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2564 * value passed here (i.e. true). */
Kevin Wolf39829a02017-01-24 14:21:41 +01002565 blk_dev_change_media_cb(blk, true, &local_err);
2566 if (local_err) {
2567 error_propagate(errp, local_err);
2568 blk_remove_bs(blk);
2569 return;
2570 }
Max Reitz12c7ec82016-01-29 20:49:11 +01002571 }
Max Reitzd1299882015-10-26 21:39:11 +01002572}
2573
Kevin Wolf716df212016-09-20 13:38:44 +02002574void qmp_x_blockdev_insert_medium(bool has_device, const char *device,
2575 bool has_id, const char *id,
2576 const char *node_name, Error **errp)
Max Reitzd1299882015-10-26 21:39:11 +01002577{
Kevin Wolf716df212016-09-20 13:38:44 +02002578 BlockBackend *blk;
Max Reitzd1299882015-10-26 21:39:11 +01002579 BlockDriverState *bs;
2580
Kevin Wolf716df212016-09-20 13:38:44 +02002581 blk = qmp_get_blk(has_device ? device : NULL,
2582 has_id ? id : NULL,
2583 errp);
2584 if (!blk) {
2585 return;
2586 }
2587
Max Reitzd1299882015-10-26 21:39:11 +01002588 bs = bdrv_find_node(node_name);
2589 if (!bs) {
2590 error_setg(errp, "Node '%s' not found", node_name);
2591 return;
2592 }
2593
Kevin Wolf1f0c4612016-03-22 18:38:44 +01002594 if (bdrv_has_blk(bs)) {
Kevin Wolfe467da72016-09-21 14:56:09 +02002595 error_setg(errp, "Node '%s' is already in use", node_name);
Max Reitzd1299882015-10-26 21:39:11 +01002596 return;
2597 }
2598
Kevin Wolf716df212016-09-20 13:38:44 +02002599 qmp_blockdev_insert_anon_medium(blk, bs, errp);
Max Reitzd1299882015-10-26 21:39:11 +01002600}
2601
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002602void qmp_blockdev_change_medium(bool has_device, const char *device,
2603 bool has_id, const char *id,
2604 const char *filename,
Max Reitz24fb4132015-11-06 16:27:06 +01002605 bool has_format, const char *format,
Max Reitz39ff43d2015-11-11 04:49:44 +01002606 bool has_read_only,
2607 BlockdevChangeReadOnlyMode read_only,
Max Reitz24fb4132015-11-06 16:27:06 +01002608 Error **errp)
Max Reitzde2c6c02015-10-26 21:39:13 +01002609{
2610 BlockBackend *blk;
2611 BlockDriverState *medium_bs = NULL;
Max Reitz5b363932016-05-17 16:41:31 +02002612 int bdrv_flags;
Kevin Wolfb85114f2016-09-12 19:08:31 +02002613 bool detect_zeroes;
Colin Lord38a53d52016-06-08 13:56:28 -04002614 int rc;
Max Reitzde2c6c02015-10-26 21:39:13 +01002615 QDict *options = NULL;
2616 Error *err = NULL;
2617
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002618 blk = qmp_get_blk(has_device ? device : NULL,
2619 has_id ? id : NULL,
2620 errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002621 if (!blk) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002622 goto fail;
2623 }
2624
2625 if (blk_bs(blk)) {
2626 blk_update_root_state(blk);
2627 }
2628
2629 bdrv_flags = blk_get_open_flags_from_root_state(blk);
Alyssa Milburn156abc22016-02-06 13:36:18 +00002630 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
2631 BDRV_O_PROTOCOL);
Max Reitzde2c6c02015-10-26 21:39:13 +01002632
Max Reitz39ff43d2015-11-11 04:49:44 +01002633 if (!has_read_only) {
2634 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2635 }
2636
2637 switch (read_only) {
2638 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2639 break;
2640
2641 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2642 bdrv_flags &= ~BDRV_O_RDWR;
2643 break;
2644
2645 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2646 bdrv_flags |= BDRV_O_RDWR;
2647 break;
2648
2649 default:
2650 abort();
2651 }
2652
Kevin Wolfb85114f2016-09-12 19:08:31 +02002653 options = qdict_new();
2654 detect_zeroes = blk_get_detect_zeroes_from_root_state(blk);
Eric Blake46f5ac22017-04-27 16:58:17 -05002655 qdict_put_str(options, "detect-zeroes", detect_zeroes ? "on" : "off");
Kevin Wolfb85114f2016-09-12 19:08:31 +02002656
Max Reitz24fb4132015-11-06 16:27:06 +01002657 if (has_format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05002658 qdict_put_str(options, "driver", format);
Max Reitzde2c6c02015-10-26 21:39:13 +01002659 }
2660
Max Reitz5b363932016-05-17 16:41:31 +02002661 medium_bs = bdrv_open(filename, NULL, options, bdrv_flags, errp);
2662 if (!medium_bs) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002663 goto fail;
2664 }
2665
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002666 rc = do_open_tray(has_device ? device : NULL,
2667 has_id ? id : NULL,
2668 false, &err);
Colin Lord38a53d52016-06-08 13:56:28 -04002669 if (rc && rc != -ENOSYS) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002670 error_propagate(errp, err);
2671 goto fail;
2672 }
Colin Lord38a53d52016-06-08 13:56:28 -04002673 error_free(err);
2674 err = NULL;
Max Reitzde2c6c02015-10-26 21:39:13 +01002675
Kevin Wolf24df38b2016-09-26 15:03:00 +02002676 qmp_x_blockdev_remove_medium(has_device, device, has_id, id, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002677 if (err) {
2678 error_propagate(errp, err);
2679 goto fail;
2680 }
2681
Kevin Wolf716df212016-09-20 13:38:44 +02002682 qmp_blockdev_insert_anon_medium(blk, medium_bs, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002683 if (err) {
2684 error_propagate(errp, err);
2685 goto fail;
2686 }
2687
Kevin Wolf70e2cb32016-09-20 13:38:47 +02002688 qmp_blockdev_close_tray(has_device, device, has_id, id, errp);
Max Reitzde2c6c02015-10-26 21:39:13 +01002689
2690fail:
2691 /* If the medium has been inserted, the device has its own reference, so
2692 * ours must be relinquished; and if it has not been inserted successfully,
2693 * the reference must be relinquished anyway */
2694 bdrv_unref(medium_bs);
2695}
2696
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002697/* throttling disk I/O limits */
Eric Blake4dc93972016-07-13 21:50:21 -06002698void qmp_block_set_io_throttle(BlockIOThrottle *arg, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002699{
Benoît Canetcc0681c2013-09-02 14:14:39 +02002700 ThrottleConfig cfg;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002701 BlockDriverState *bs;
Fam Zhenga0e85442015-03-02 19:36:48 +08002702 BlockBackend *blk;
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002703 AioContext *aio_context;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002704
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002705 blk = qmp_get_blk(arg->has_device ? arg->device : NULL,
2706 arg->has_id ? arg->id : NULL,
2707 errp);
Fam Zhenga0e85442015-03-02 19:36:48 +08002708 if (!blk) {
Luiz Capitulino80047da2011-12-14 16:49:14 -02002709 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002710 }
Max Reitz5433c242015-10-19 17:53:29 +02002711
2712 aio_context = blk_get_aio_context(blk);
2713 aio_context_acquire(aio_context);
2714
Fam Zhenga0e85442015-03-02 19:36:48 +08002715 bs = blk_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002716 if (!bs) {
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002717 error_setg(errp, "Device has no medium");
Max Reitz5433c242015-10-19 17:53:29 +02002718 goto out;
2719 }
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002720
Alberto Garcia1588ab52016-02-18 12:27:00 +02002721 throttle_config_init(&cfg);
Eric Blake4dc93972016-07-13 21:50:21 -06002722 cfg.buckets[THROTTLE_BPS_TOTAL].avg = arg->bps;
2723 cfg.buckets[THROTTLE_BPS_READ].avg = arg->bps_rd;
2724 cfg.buckets[THROTTLE_BPS_WRITE].avg = arg->bps_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002725
Eric Blake4dc93972016-07-13 21:50:21 -06002726 cfg.buckets[THROTTLE_OPS_TOTAL].avg = arg->iops;
2727 cfg.buckets[THROTTLE_OPS_READ].avg = arg->iops_rd;
2728 cfg.buckets[THROTTLE_OPS_WRITE].avg = arg->iops_wr;
Benoît Canetcc0681c2013-09-02 14:14:39 +02002729
Eric Blake4dc93972016-07-13 21:50:21 -06002730 if (arg->has_bps_max) {
2731 cfg.buckets[THROTTLE_BPS_TOTAL].max = arg->bps_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002732 }
Eric Blake4dc93972016-07-13 21:50:21 -06002733 if (arg->has_bps_rd_max) {
2734 cfg.buckets[THROTTLE_BPS_READ].max = arg->bps_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002735 }
Eric Blake4dc93972016-07-13 21:50:21 -06002736 if (arg->has_bps_wr_max) {
2737 cfg.buckets[THROTTLE_BPS_WRITE].max = arg->bps_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002738 }
Eric Blake4dc93972016-07-13 21:50:21 -06002739 if (arg->has_iops_max) {
2740 cfg.buckets[THROTTLE_OPS_TOTAL].max = arg->iops_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002741 }
Eric Blake4dc93972016-07-13 21:50:21 -06002742 if (arg->has_iops_rd_max) {
2743 cfg.buckets[THROTTLE_OPS_READ].max = arg->iops_rd_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002744 }
Eric Blake4dc93972016-07-13 21:50:21 -06002745 if (arg->has_iops_wr_max) {
2746 cfg.buckets[THROTTLE_OPS_WRITE].max = arg->iops_wr_max;
Benoît Canet3e9fab62013-09-02 14:14:40 +02002747 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002748
Eric Blake4dc93972016-07-13 21:50:21 -06002749 if (arg->has_bps_max_length) {
2750 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = arg->bps_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002751 }
Eric Blake4dc93972016-07-13 21:50:21 -06002752 if (arg->has_bps_rd_max_length) {
2753 cfg.buckets[THROTTLE_BPS_READ].burst_length = arg->bps_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002754 }
Eric Blake4dc93972016-07-13 21:50:21 -06002755 if (arg->has_bps_wr_max_length) {
2756 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = arg->bps_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002757 }
Eric Blake4dc93972016-07-13 21:50:21 -06002758 if (arg->has_iops_max_length) {
2759 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = arg->iops_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002760 }
Eric Blake4dc93972016-07-13 21:50:21 -06002761 if (arg->has_iops_rd_max_length) {
2762 cfg.buckets[THROTTLE_OPS_READ].burst_length = arg->iops_rd_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002763 }
Eric Blake4dc93972016-07-13 21:50:21 -06002764 if (arg->has_iops_wr_max_length) {
2765 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = arg->iops_wr_max_length;
Alberto Garciadce13202016-02-18 12:27:03 +02002766 }
2767
Eric Blake4dc93972016-07-13 21:50:21 -06002768 if (arg->has_iops_size) {
2769 cfg.op_size = arg->iops_size;
Benoît Canet2024c1d2013-09-02 14:14:41 +02002770 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002771
Alberto Garciad5851082016-02-18 12:26:59 +02002772 if (!throttle_is_valid(&cfg, errp)) {
Max Reitz5433c242015-10-19 17:53:29 +02002773 goto out;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002774 }
2775
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002776 if (throttle_enabled(&cfg)) {
2777 /* Enable I/O limits if they're not enabled yet, otherwise
2778 * just update the throttling group. */
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002779 if (!blk_get_public(blk)->throttle_group_member.throttle_state) {
Eric Blake4dc93972016-07-13 21:50:21 -06002780 blk_io_limits_enable(blk,
Kevin Wolf7a9877a2016-09-20 13:38:48 +02002781 arg->has_group ? arg->group :
2782 arg->has_device ? arg->device :
2783 arg->id);
Eric Blake4dc93972016-07-13 21:50:21 -06002784 } else if (arg->has_group) {
2785 blk_io_limits_update_group(blk, arg->group);
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002786 }
2787 /* Set the new throttling configuration */
Kevin Wolf97148072016-03-21 13:53:52 +01002788 blk_set_io_limits(blk, &cfg);
Manos Pitsidianakis022cdc92017-08-25 16:20:23 +03002789 } else if (blk_get_public(blk)->throttle_group_member.throttle_state) {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002790 /* If all throttling settings are set to 0, disable I/O limits */
Kevin Wolf97148072016-03-21 13:53:52 +01002791 blk_io_limits_disable(blk);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002792 }
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002793
Max Reitz5433c242015-10-19 17:53:29 +02002794out:
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002795 aio_context_release(aio_context);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002796}
2797
John Snow341ebc22015-04-17 19:49:52 -04002798void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2799 bool has_granularity, uint32_t granularity,
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002800 bool has_persistent, bool persistent,
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002801 bool has_autoload, bool autoload,
John Snow341ebc22015-04-17 19:49:52 -04002802 Error **errp)
2803{
John Snow341ebc22015-04-17 19:49:52 -04002804 BlockDriverState *bs;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002805 BdrvDirtyBitmap *bitmap;
John Snow341ebc22015-04-17 19:49:52 -04002806
2807 if (!name || name[0] == '\0') {
2808 error_setg(errp, "Bitmap name cannot be empty");
2809 return;
2810 }
2811
2812 bs = bdrv_lookup_bs(node, node, errp);
2813 if (!bs) {
2814 return;
2815 }
2816
John Snow341ebc22015-04-17 19:49:52 -04002817 if (has_granularity) {
2818 if (granularity < 512 || !is_power_of_2(granularity)) {
2819 error_setg(errp, "Granularity must be power of 2 "
2820 "and at least 512");
Paolo Bonzini21198822017-06-05 14:39:03 +02002821 return;
John Snow341ebc22015-04-17 19:49:52 -04002822 }
2823 } else {
2824 /* Default to cluster size, if available: */
2825 granularity = bdrv_get_default_bitmap_granularity(bs);
2826 }
2827
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002828 if (!has_persistent) {
2829 persistent = false;
2830 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002831 if (!has_autoload) {
2832 autoload = false;
2833 }
2834
2835 if (has_autoload && !persistent) {
2836 error_setg(errp, "Autoload flag must be used only for persistent "
2837 "bitmaps");
2838 return;
2839 }
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002840
2841 if (persistent &&
2842 !bdrv_can_store_new_dirty_bitmap(bs, name, granularity, errp))
2843 {
2844 return;
2845 }
2846
2847 bitmap = bdrv_create_dirty_bitmap(bs, granularity, name, errp);
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002848 if (bitmap == NULL) {
2849 return;
Vladimir Sementsov-Ogievskiyfd5ae4c2017-06-28 15:05:23 +03002850 }
Vladimir Sementsov-Ogievskiyeb738bb2017-06-28 15:05:24 +03002851
2852 bdrv_dirty_bitmap_set_persistance(bitmap, persistent);
2853 bdrv_dirty_bitmap_set_autoload(bitmap, autoload);
John Snow341ebc22015-04-17 19:49:52 -04002854}
2855
2856void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2857 Error **errp)
2858{
John Snow341ebc22015-04-17 19:49:52 -04002859 BlockDriverState *bs;
2860 BdrvDirtyBitmap *bitmap;
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002861 Error *local_err = NULL;
John Snow341ebc22015-04-17 19:49:52 -04002862
Paolo Bonzini21198822017-06-05 14:39:03 +02002863 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snow341ebc22015-04-17 19:49:52 -04002864 if (!bitmap || !bs) {
2865 return;
2866 }
2867
John Snow9bd2b082015-04-17 19:49:57 -04002868 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2869 error_setg(errp,
2870 "Bitmap '%s' is currently frozen and cannot be removed",
2871 name);
Paolo Bonzini21198822017-06-05 14:39:03 +02002872 return;
John Snow9bd2b082015-04-17 19:49:57 -04002873 }
Vladimir Sementsov-Ogievskiy5c36c1a2017-06-28 15:05:29 +03002874
2875 if (bdrv_dirty_bitmap_get_persistance(bitmap)) {
2876 bdrv_remove_persistent_dirty_bitmap(bs, name, &local_err);
2877 if (local_err != NULL) {
2878 error_propagate(errp, local_err);
2879 return;
2880 }
2881 }
2882
John Snow20dca812015-04-17 19:50:02 -04002883 bdrv_dirty_bitmap_make_anon(bitmap);
John Snow341ebc22015-04-17 19:49:52 -04002884 bdrv_release_dirty_bitmap(bs, bitmap);
John Snow341ebc22015-04-17 19:49:52 -04002885}
2886
John Snowe74e6b72015-04-17 19:49:59 -04002887/**
2888 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2889 * immediately after a full backup operation.
2890 */
2891void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2892 Error **errp)
2893{
John Snowe74e6b72015-04-17 19:49:59 -04002894 BdrvDirtyBitmap *bitmap;
2895 BlockDriverState *bs;
2896
Paolo Bonzini21198822017-06-05 14:39:03 +02002897 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
John Snowe74e6b72015-04-17 19:49:59 -04002898 if (!bitmap || !bs) {
2899 return;
2900 }
2901
2902 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2903 error_setg(errp,
2904 "Bitmap '%s' is currently frozen and cannot be modified",
2905 name);
Paolo Bonzini21198822017-06-05 14:39:03 +02002906 return;
John Snowe74e6b72015-04-17 19:49:59 -04002907 } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
2908 error_setg(errp,
2909 "Bitmap '%s' is currently disabled and cannot be cleared",
2910 name);
Paolo Bonzini21198822017-06-05 14:39:03 +02002911 return;
Vladimir Sementsov-Ogievskiyd6883bc2017-06-28 15:05:10 +03002912 } else if (bdrv_dirty_bitmap_readonly(bitmap)) {
2913 error_setg(errp, "Bitmap '%s' is readonly and cannot be cleared", name);
2914 return;
John Snowe74e6b72015-04-17 19:49:59 -04002915 }
2916
Fam Zhengdf9a6812015-11-09 18:16:54 +08002917 bdrv_clear_dirty_bitmap(bitmap, NULL);
John Snowe74e6b72015-04-17 19:49:59 -04002918}
2919
Vladimir Sementsov-Ogievskiya3b52532017-06-28 15:05:25 +03002920BlockDirtyBitmapSha256 *qmp_x_debug_block_dirty_bitmap_sha256(const char *node,
2921 const char *name,
2922 Error **errp)
2923{
2924 BdrvDirtyBitmap *bitmap;
2925 BlockDriverState *bs;
2926 BlockDirtyBitmapSha256 *ret = NULL;
2927 char *sha256;
2928
2929 bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
2930 if (!bitmap || !bs) {
2931 return NULL;
2932 }
2933
2934 sha256 = bdrv_dirty_bitmap_sha256(bitmap, errp);
2935 if (sha256 == NULL) {
2936 return NULL;
2937 }
2938
2939 ret = g_new(BlockDirtyBitmapSha256, 1);
2940 ret->sha256 = sha256;
2941
2942 return ret;
2943}
2944
Markus Armbruster072ebe62015-03-05 17:00:56 +01002945void hmp_drive_del(Monitor *mon, const QDict *qdict)
Ryan Harper9063f812010-11-12 11:07:13 -06002946{
2947 const char *id = qdict_get_str(qdict, "id");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002948 BlockBackend *blk;
Ryan Harper9063f812010-11-12 11:07:13 -06002949 BlockDriverState *bs;
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002950 AioContext *aio_context;
Fam Zheng3718d8a2014-05-23 21:29:43 +08002951 Error *local_err = NULL;
Ryan Harper9063f812010-11-12 11:07:13 -06002952
Kevin Wolf2073d412016-02-23 17:50:37 +01002953 bs = bdrv_find_node(id);
2954 if (bs) {
Markus Armbruster79b7a772017-03-21 17:53:28 +01002955 qmp_blockdev_del(id, &local_err);
Kevin Wolf2073d412016-02-23 17:50:37 +01002956 if (local_err) {
2957 error_report_err(local_err);
2958 }
2959 return;
2960 }
2961
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002962 blk = blk_by_name(id);
2963 if (!blk) {
Markus Armbrusterb1422f22014-05-16 11:00:09 +02002964 error_report("Device '%s' not found", id);
Markus Armbruster072ebe62015-03-05 17:00:56 +01002965 return;
Ryan Harper9063f812010-11-12 11:07:13 -06002966 }
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002967
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02002968 if (!blk_legacy_dinfo(blk)) {
Markus Armbruster48f364d2014-09-11 16:45:39 +02002969 error_report("Deleting device added with blockdev-add"
2970 " is not supported");
Markus Armbruster072ebe62015-03-05 17:00:56 +01002971 return;
Markus Armbruster48f364d2014-09-11 16:45:39 +02002972 }
2973
Max Reitz5433c242015-10-19 17:53:29 +02002974 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002975 aio_context_acquire(aio_context);
2976
Max Reitz5433c242015-10-19 17:53:29 +02002977 bs = blk_bs(blk);
2978 if (bs) {
2979 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
2980 error_report_err(local_err);
2981 aio_context_release(aio_context);
2982 return;
2983 }
Ryan Harper9063f812010-11-12 11:07:13 -06002984
Max Reitz938abd42016-01-29 16:36:09 +01002985 blk_remove_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002986 }
Ryan Harper9063f812010-11-12 11:07:13 -06002987
Max Reitz7c735872016-03-16 19:54:39 +01002988 /* Make the BlockBackend and the attached BlockDriverState anonymous */
Max Reitzefaa7c42016-03-16 19:54:38 +01002989 monitor_remove_blk(blk);
2990
Max Reitz7c735872016-03-16 19:54:39 +01002991 /* If this BlockBackend has a device attached to it, its refcount will be
2992 * decremented when the device is removed; otherwise we have to do so here.
Ryan Harperd22b2f42011-03-29 20:51:47 -05002993 */
Markus Armbrustera7f53e22014-10-07 13:59:25 +02002994 if (blk_get_attached_dev(blk)) {
Stefan Hajnoczi293c51a2013-06-05 10:33:14 +02002995 /* Further I/O must not pause the guest */
Max Reitz373340b2015-10-19 17:53:22 +02002996 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
2997 BLOCKDEV_ON_ERROR_REPORT);
Ryan Harperd22b2f42011-03-29 20:51:47 -05002998 } else {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +02002999 blk_unref(blk);
Ryan Harper9063f812010-11-12 11:07:13 -06003000 }
3001
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01003002 aio_context_release(aio_context);
Ryan Harper9063f812010-11-12 11:07:13 -06003003}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003004
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003005void qmp_block_resize(bool has_device, const char *device,
3006 bool has_node_name, const char *node_name,
3007 int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003008{
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003009 Error *local_err = NULL;
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003010 BlockBackend *blk = NULL;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003011 BlockDriverState *bs;
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003012 AioContext *aio_context;
Kevin Wolf87329012013-05-02 15:32:55 +02003013 int ret;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003014
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003015 bs = bdrv_lookup_bs(has_device ? device : NULL,
3016 has_node_name ? node_name : NULL,
3017 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003018 if (local_err) {
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003019 error_propagate(errp, local_err);
3020 return;
3021 }
3022
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003023 aio_context = bdrv_get_aio_context(bs);
3024 aio_context_acquire(aio_context);
3025
Benoît Canet3b1dbd12014-01-23 21:31:37 +01003026 if (!bdrv_is_first_non_filter(bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003027 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003028 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003029 }
3030
3031 if (size < 0) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003032 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003033 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003034 }
3035
Jeff Cody9c75e162014-06-25 16:55:30 -04003036 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003037 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003038 goto out;
Jeff Cody9c75e162014-06-25 16:55:30 -04003039 }
3040
Kevin Wolf6d0eb642017-01-20 17:07:26 +01003041 blk = blk_new(BLK_PERM_RESIZE, BLK_PERM_ALL);
Kevin Wolfd7086422017-01-13 19:02:32 +01003042 ret = blk_insert_bs(blk, bs, errp);
3043 if (ret < 0) {
3044 goto out;
3045 }
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003046
John Snow698bdfa2017-05-10 13:39:45 -04003047 bdrv_drained_begin(bs);
Max Reitz3a691c52017-06-13 22:20:54 +02003048 ret = blk_truncate(blk, size, PREALLOC_MODE_OFF, errp);
John Snow698bdfa2017-05-10 13:39:45 -04003049 bdrv_drained_end(bs);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003050
3051out:
Kevin Wolf7dad9ee2017-02-17 11:23:33 +01003052 blk_unref(blk);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01003053 aio_context_release(aio_context);
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01003054}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003055
Alberto Garcia23233222016-07-05 17:28:59 +03003056void qmp_block_stream(bool has_job_id, const char *job_id, const char *device,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003057 bool has_base, const char *base,
Alberto Garcia312fe092016-10-28 10:08:19 +03003058 bool has_base_node, const char *base_node,
Jeff Cody13d8cc52014-06-25 15:40:11 -04003059 bool has_backing_file, const char *backing_file,
3060 bool has_speed, int64_t speed,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003061 bool has_on_error, BlockdevOnError on_error,
3062 Error **errp)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003063{
Alberto Garcia554b6142016-10-28 10:08:11 +03003064 BlockDriverState *bs, *iter;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003065 BlockDriverState *base_bs = NULL;
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003066 AioContext *aio_context;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003067 Error *local_err = NULL;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003068 const char *base_name = NULL;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003069
Paolo Bonzini1d809092012-09-28 17:22:59 +02003070 if (!has_on_error) {
3071 on_error = BLOCKDEV_ON_ERROR_REPORT;
3072 }
3073
Alberto Garcia554b6142016-10-28 10:08:11 +03003074 bs = bdrv_lookup_bs(device, device, errp);
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003075 if (!bs) {
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003076 return;
3077 }
3078
Kevin Wolfb6c1bae2016-06-23 14:20:24 +02003079 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003080 aio_context_acquire(aio_context);
3081
Alberto Garcia312fe092016-10-28 10:08:19 +03003082 if (has_base && has_base_node) {
3083 error_setg(errp, "'base' and 'base-node' cannot be specified "
3084 "at the same time");
3085 goto out;
3086 }
3087
Jeff Cody13d8cc52014-06-25 15:40:11 -04003088 if (has_base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003089 base_bs = bdrv_find_backing_image(bs, base);
3090 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003091 error_setg(errp, QERR_BASE_NOT_FOUND, base);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003092 goto out;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003093 }
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003094 assert(bdrv_get_aio_context(base_bs) == aio_context);
Jeff Cody13d8cc52014-06-25 15:40:11 -04003095 base_name = base;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003096 }
3097
Alberto Garcia312fe092016-10-28 10:08:19 +03003098 if (has_base_node) {
3099 base_bs = bdrv_lookup_bs(NULL, base_node, errp);
3100 if (!base_bs) {
3101 goto out;
3102 }
3103 if (bs == base_bs || !bdrv_chain_contains(bs, base_bs)) {
3104 error_setg(errp, "Node '%s' is not a backing image of '%s'",
3105 base_node, device);
3106 goto out;
3107 }
3108 assert(bdrv_get_aio_context(base_bs) == aio_context);
3109 base_name = base_bs->filename;
3110 }
3111
Alberto Garcia554b6142016-10-28 10:08:11 +03003112 /* Check for op blockers in the whole chain between bs and base */
3113 for (iter = bs; iter && iter != base_bs; iter = backing_bs(iter)) {
3114 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_STREAM, errp)) {
3115 goto out;
3116 }
3117 }
3118
Jeff Cody13d8cc52014-06-25 15:40:11 -04003119 /* if we are streaming the entire chain, the result will have no backing
3120 * file, and specifying one is therefore an error */
3121 if (base_bs == NULL && has_backing_file) {
3122 error_setg(errp, "backing file specified, but streaming the "
3123 "entire chain");
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003124 goto out;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003125 }
3126
3127 /* backing_file string overrides base bs filename */
3128 base_name = has_backing_file ? backing_file : base_name;
3129
Alberto Garcia23233222016-07-05 17:28:59 +03003130 stream_start(has_job_id ? job_id : NULL, bs, base_bs, base_name,
John Snow8254b6d2016-10-27 12:06:58 -04003131 has_speed ? speed : 0, on_error, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003132 if (local_err) {
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003133 error_propagate(errp, local_err);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003134 goto out;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003135 }
3136
3137 trace_qmp_block_stream(bs, bs->job);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003138
3139out:
3140 aio_context_release(aio_context);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003141}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003142
Alberto Garciafd62c602016-07-05 17:29:00 +03003143void qmp_block_commit(bool has_job_id, const char *job_id, const char *device,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003144 bool has_base, const char *base,
3145 bool has_top, const char *top,
Jeff Cody54e26902014-06-25 15:40:10 -04003146 bool has_backing_file, const char *backing_file,
Jeff Codyed61fc12012-09-27 13:29:16 -04003147 bool has_speed, int64_t speed,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003148 bool has_filter_node_name, const char *filter_node_name,
Jeff Codyed61fc12012-09-27 13:29:16 -04003149 Error **errp)
3150{
3151 BlockDriverState *bs;
Alberto Garcia058223a2016-10-28 10:08:07 +03003152 BlockDriverState *iter;
Jeff Codyed61fc12012-09-27 13:29:16 -04003153 BlockDriverState *base_bs, *top_bs;
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003154 AioContext *aio_context;
Jeff Codyed61fc12012-09-27 13:29:16 -04003155 Error *local_err = NULL;
3156 /* This will be part of the QMP command, if/when the
3157 * BlockdevOnError change for blkmirror makes it in
3158 */
Paolo Bonzini92aa5c62012-09-28 17:22:55 +02003159 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
Jeff Codyed61fc12012-09-27 13:29:16 -04003160
Max Reitz54504662014-04-10 19:36:25 +02003161 if (!has_speed) {
3162 speed = 0;
3163 }
Kevin Wolf0db832f2017-02-20 18:10:05 +01003164 if (!has_filter_node_name) {
3165 filter_node_name = NULL;
3166 }
Max Reitz54504662014-04-10 19:36:25 +02003167
Jeff Cody7676e2c2014-06-30 15:14:15 +02003168 /* Important Note:
3169 * libvirt relies on the DeviceNotFound error class in order to probe for
3170 * live commit feature versions; for this to work, we must make sure to
3171 * perform the device lookup before any generic errors that may occur in a
3172 * scenario in which all optional arguments are omitted. */
Kevin Wolf1d13b162016-06-23 14:20:24 +02003173 bs = qmp_get_root_bs(device, &local_err);
3174 if (!bs) {
3175 bs = bdrv_lookup_bs(device, device, NULL);
3176 if (!bs) {
3177 error_free(local_err);
3178 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3179 "Device '%s' not found", device);
3180 } else {
3181 error_propagate(errp, local_err);
3182 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003183 return;
3184 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003185
Kevin Wolf1d13b162016-06-23 14:20:24 +02003186 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003187 aio_context_acquire(aio_context);
3188
Fam Zhengbb000212014-09-11 13:14:00 +08003189 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003190 goto out;
Fam Zheng628ff682014-05-23 21:29:44 +08003191 }
3192
Jeff Codyed61fc12012-09-27 13:29:16 -04003193 /* default top_bs is the active layer */
3194 top_bs = bs;
3195
Jeff Cody7676e2c2014-06-30 15:14:15 +02003196 if (has_top && top) {
Jeff Codyed61fc12012-09-27 13:29:16 -04003197 if (strcmp(bs->filename, top) != 0) {
3198 top_bs = bdrv_find_backing_image(bs, top);
3199 }
3200 }
3201
3202 if (top_bs == NULL) {
3203 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003204 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003205 }
3206
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003207 assert(bdrv_get_aio_context(top_bs) == aio_context);
3208
Jeff Codyd5208c42012-10-16 15:49:10 -04003209 if (has_base && base) {
3210 base_bs = bdrv_find_backing_image(top_bs, base);
3211 } else {
3212 base_bs = bdrv_find_base(top_bs);
3213 }
3214
3215 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003216 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003217 goto out;
Jeff Codyd5208c42012-10-16 15:49:10 -04003218 }
3219
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003220 assert(bdrv_get_aio_context(base_bs) == aio_context);
3221
Alberto Garcia058223a2016-10-28 10:08:07 +03003222 for (iter = top_bs; iter != backing_bs(base_bs); iter = backing_bs(iter)) {
3223 if (bdrv_op_is_blocked(iter, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3224 goto out;
3225 }
Fam Zhengbb000212014-09-11 13:14:00 +08003226 }
3227
Jeff Cody7676e2c2014-06-30 15:14:15 +02003228 /* Do not allow attempts to commit an image into itself */
3229 if (top_bs == base_bs) {
3230 error_setg(errp, "cannot commit an image into itself");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003231 goto out;
Jeff Cody7676e2c2014-06-30 15:14:15 +02003232 }
3233
Fam Zheng20a63d22013-12-16 14:45:31 +08003234 if (top_bs == bs) {
Jeff Cody54e26902014-06-25 15:40:10 -04003235 if (has_backing_file) {
3236 error_setg(errp, "'backing-file' specified,"
3237 " but 'top' is the active layer");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003238 goto out;
Jeff Cody54e26902014-06-25 15:40:10 -04003239 }
John Snow47970df2016-10-27 12:06:57 -04003240 commit_active_start(has_job_id ? job_id : NULL, bs, base_bs,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003241 BLOCK_JOB_DEFAULT, speed, on_error,
Fam Zheng78bbd912017-04-21 20:27:04 +08003242 filter_node_name, NULL, NULL, false, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003243 } else {
Alberto Garcia058223a2016-10-28 10:08:07 +03003244 BlockDriverState *overlay_bs = bdrv_find_overlay(bs, top_bs);
3245 if (bdrv_op_is_blocked(overlay_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3246 goto out;
3247 }
Alberto Garciafd62c602016-07-05 17:29:00 +03003248 commit_start(has_job_id ? job_id : NULL, bs, base_bs, top_bs, speed,
John Snow8254b6d2016-10-27 12:06:58 -04003249 on_error, has_backing_file ? backing_file : NULL,
Kevin Wolf0db832f2017-02-20 18:10:05 +01003250 filter_node_name, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003251 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003252 if (local_err != NULL) {
3253 error_propagate(errp, local_err);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003254 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003255 }
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003256
3257out:
3258 aio_context_release(aio_context);
Jeff Codyed61fc12012-09-27 13:29:16 -04003259}
3260
John Snow111049a2016-11-08 01:50:38 -05003261static BlockJob *do_drive_backup(DriveBackup *backup, BlockJobTxn *txn,
3262 Error **errp)
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003263{
3264 BlockDriverState *bs;
3265 BlockDriverState *target_bs;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003266 BlockDriverState *source = NULL;
John Snow111049a2016-11-08 01:50:38 -05003267 BlockJob *job = NULL;
John Snowd58d8452015-04-17 19:49:58 -04003268 BdrvDirtyBitmap *bmap = NULL;
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003269 AioContext *aio_context;
Max Reitze6641712015-08-26 19:47:48 +02003270 QDict *options = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003271 Error *local_err = NULL;
3272 int flags;
3273 int64_t size;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003274 bool set_backing_hd = false;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003275
Pavel Butsykin81206a82016-07-22 11:17:50 +03003276 if (!backup->has_speed) {
3277 backup->speed = 0;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003278 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003279 if (!backup->has_on_source_error) {
3280 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003281 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003282 if (!backup->has_on_target_error) {
3283 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003284 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003285 if (!backup->has_mode) {
3286 backup->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3287 }
3288 if (!backup->has_job_id) {
3289 backup->job_id = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003290 }
Pavel Butsykin13b94142016-07-22 11:17:52 +03003291 if (!backup->has_compress) {
3292 backup->compress = false;
3293 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003294
Pavel Butsykin81206a82016-07-22 11:17:50 +03003295 bs = qmp_get_root_bs(backup->device, errp);
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003296 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003297 return NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003298 }
3299
Kevin Wolfb7e4fa22016-06-23 14:20:24 +02003300 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003301 aio_context_acquire(aio_context);
3302
Pavel Butsykin81206a82016-07-22 11:17:50 +03003303 if (!backup->has_format) {
3304 backup->format = backup->mode == NEW_IMAGE_MODE_EXISTING ?
3305 NULL : (char*) bs->drv->format_name;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003306 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003307
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003308 /* Early check to avoid creating target */
Fam Zheng3718d8a2014-05-23 21:29:43 +08003309 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003310 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003311 }
3312
Kevin Wolf61de4c62016-03-18 17:46:45 +01003313 flags = bs->open_flags | BDRV_O_RDWR;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003314
Ian Mainfc5d3f82013-07-26 11:39:04 -07003315 /* See if we have a backing HD we can use to create our new image
3316 * on top of. */
Pavel Butsykin81206a82016-07-22 11:17:50 +03003317 if (backup->sync == MIRROR_SYNC_MODE_TOP) {
Kevin Wolf760e0062015-06-17 14:55:21 +02003318 source = backing_bs(bs);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003319 if (!source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003320 backup->sync = MIRROR_SYNC_MODE_FULL;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003321 }
3322 }
Pavel Butsykin81206a82016-07-22 11:17:50 +03003323 if (backup->sync == MIRROR_SYNC_MODE_NONE) {
Ian Mainfc5d3f82013-07-26 11:39:04 -07003324 source = bs;
Fam Zhengfc0932f2017-05-03 00:35:53 +08003325 flags |= BDRV_O_NO_BACKING;
3326 set_backing_hd = true;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003327 }
3328
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003329 size = bdrv_getlength(bs);
3330 if (size < 0) {
3331 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003332 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003333 }
3334
Pavel Butsykin81206a82016-07-22 11:17:50 +03003335 if (backup->mode != NEW_IMAGE_MODE_EXISTING) {
3336 assert(backup->format);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003337 if (source) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003338 bdrv_img_create(backup->target, backup->format, source->filename,
Ian Mainfc5d3f82013-07-26 11:39:04 -07003339 source->drv->format_name, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003340 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003341 } else {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003342 bdrv_img_create(backup->target, backup->format, NULL, NULL, NULL,
Fam Zheng92172832017-04-21 20:27:01 +08003343 size, flags, false, &local_err);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003344 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003345 }
3346
Markus Armbruster84d18f02014-01-30 15:07:28 +01003347 if (local_err) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003348 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003349 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003350 }
3351
Pavel Butsykin81206a82016-07-22 11:17:50 +03003352 if (backup->format) {
Fam Zhengfc0932f2017-05-03 00:35:53 +08003353 if (!options) {
3354 options = qdict_new();
3355 }
Eric Blake46f5ac22017-04-27 16:58:17 -05003356 qdict_put_str(options, "driver", backup->format);
Max Reitze6641712015-08-26 19:47:48 +02003357 }
3358
Pavel Butsykin81206a82016-07-22 11:17:50 +03003359 target_bs = bdrv_open(backup->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003360 if (!target_bs) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003361 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003362 }
3363
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003364 bdrv_set_aio_context(target_bs, aio_context);
3365
Fam Zhengfc0932f2017-05-03 00:35:53 +08003366 if (set_backing_hd) {
3367 bdrv_set_backing_hd(target_bs, source, &local_err);
3368 if (local_err) {
3369 bdrv_unref(target_bs);
3370 goto out;
3371 }
3372 }
3373
Pavel Butsykin81206a82016-07-22 11:17:50 +03003374 if (backup->has_bitmap) {
3375 bmap = bdrv_find_dirty_bitmap(bs, backup->bitmap);
John Snowd58d8452015-04-17 19:49:58 -04003376 if (!bmap) {
Pavel Butsykin81206a82016-07-22 11:17:50 +03003377 error_setg(errp, "Bitmap '%s' could not be found", backup->bitmap);
Max Reitz0702d3d2015-11-09 23:39:10 +01003378 bdrv_unref(target_bs);
John Snowd58d8452015-04-17 19:49:58 -04003379 goto out;
3380 }
3381 }
3382
John Snow111049a2016-11-08 01:50:38 -05003383 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
3384 backup->sync, bmap, backup->compress,
3385 backup->on_source_error, backup->on_target_error,
3386 BLOCK_JOB_DEFAULT, NULL, NULL, txn, &local_err);
Kevin Wolf5c438bc2016-04-14 13:09:53 +02003387 bdrv_unref(target_bs);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003388 if (local_err != NULL) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003389 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003390 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003391 }
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003392
3393out:
3394 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003395 return job;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003396}
3397
Pavel Butsykin81206a82016-07-22 11:17:50 +03003398void qmp_drive_backup(DriveBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003399{
John Snow111049a2016-11-08 01:50:38 -05003400
3401 BlockJob *job;
3402 job = do_drive_backup(arg, NULL, errp);
3403 if (job) {
3404 block_job_start(job);
3405 }
John Snow78f51fd2015-11-05 18:13:17 -05003406}
3407
Benoît Canetc13163f2014-01-23 21:31:34 +01003408BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3409{
Alberto Garciad5a8ee62015-04-17 14:52:43 +03003410 return bdrv_named_nodes_list(errp);
Benoît Canetc13163f2014-01-23 21:31:34 +01003411}
3412
John Snow111049a2016-11-08 01:50:38 -05003413BlockJob *do_blockdev_backup(BlockdevBackup *backup, BlockJobTxn *txn,
3414 Error **errp)
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003415{
3416 BlockDriverState *bs;
3417 BlockDriverState *target_bs;
3418 Error *local_err = NULL;
3419 AioContext *aio_context;
John Snow111049a2016-11-08 01:50:38 -05003420 BlockJob *job = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003421
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003422 if (!backup->has_speed) {
3423 backup->speed = 0;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003424 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003425 if (!backup->has_on_source_error) {
3426 backup->on_source_error = BLOCKDEV_ON_ERROR_REPORT;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003427 }
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003428 if (!backup->has_on_target_error) {
3429 backup->on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3430 }
3431 if (!backup->has_job_id) {
3432 backup->job_id = NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003433 }
Pavel Butsykin3b7b1232016-07-22 11:17:53 +03003434 if (!backup->has_compress) {
3435 backup->compress = false;
3436 }
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003437
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003438 bs = qmp_get_root_bs(backup->device, errp);
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003439 if (!bs) {
John Snow111049a2016-11-08 01:50:38 -05003440 return NULL;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003441 }
3442
Kevin Wolfcef34ee2016-06-23 14:20:24 +02003443 aio_context = bdrv_get_aio_context(bs);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003444 aio_context_acquire(aio_context);
3445
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003446 target_bs = bdrv_lookup_bs(backup->target, backup->target, errp);
Fam Zheng0d978912016-05-23 10:19:35 +08003447 if (!target_bs) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003448 goto out;
3449 }
Max Reitz5433c242015-10-19 17:53:29 +02003450
Fam Zhengefd75562016-05-23 10:19:36 +08003451 if (bdrv_get_aio_context(target_bs) != aio_context) {
3452 if (!bdrv_has_blk(target_bs)) {
3453 /* The target BDS is not attached, we can safely move it to another
3454 * AioContext. */
3455 bdrv_set_aio_context(target_bs, aio_context);
3456 } else {
3457 error_setg(errp, "Target is attached to a different thread from "
3458 "source.");
3459 goto out;
3460 }
3461 }
John Snow111049a2016-11-08 01:50:38 -05003462 job = backup_job_create(backup->job_id, bs, target_bs, backup->speed,
3463 backup->sync, NULL, backup->compress,
3464 backup->on_source_error, backup->on_target_error,
3465 BLOCK_JOB_DEFAULT, NULL, NULL, txn, &local_err);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003466 if (local_err != NULL) {
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003467 error_propagate(errp, local_err);
3468 }
3469out:
3470 aio_context_release(aio_context);
John Snow111049a2016-11-08 01:50:38 -05003471 return job;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003472}
3473
Pavel Butsykindc7a4a92016-07-22 11:17:51 +03003474void qmp_blockdev_backup(BlockdevBackup *arg, Error **errp)
John Snow78f51fd2015-11-05 18:13:17 -05003475{
John Snow111049a2016-11-08 01:50:38 -05003476 BlockJob *job;
3477 job = do_blockdev_backup(arg, NULL, errp);
3478 if (job) {
3479 block_job_start(job);
3480 }
John Snow78f51fd2015-11-05 18:13:17 -05003481}
3482
Fam Zheng4193cdd2015-12-24 12:45:03 +08003483/* Parameter check and block job starting for drive mirroring.
3484 * Caller should hold @device and @target's aio context (must be the same).
3485 **/
Alberto Garcia71aa9862016-07-05 17:28:57 +03003486static void blockdev_mirror_common(const char *job_id, BlockDriverState *bs,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003487 BlockDriverState *target,
3488 bool has_replaces, const char *replaces,
3489 enum MirrorSyncMode sync,
Max Reitz274fcce2016-06-10 20:57:47 +02003490 BlockMirrorBackingMode backing_mode,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003491 bool has_speed, int64_t speed,
3492 bool has_granularity, uint32_t granularity,
3493 bool has_buf_size, int64_t buf_size,
3494 bool has_on_source_error,
3495 BlockdevOnError on_source_error,
3496 bool has_on_target_error,
3497 BlockdevOnError on_target_error,
3498 bool has_unmap, bool unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003499 bool has_filter_node_name,
3500 const char *filter_node_name,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003501 Error **errp)
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003502{
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003503
3504 if (!has_speed) {
3505 speed = 0;
3506 }
Paolo Bonzinib952b552012-10-18 16:49:28 +02003507 if (!has_on_source_error) {
3508 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3509 }
3510 if (!has_on_target_error) {
3511 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3512 }
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003513 if (!has_granularity) {
3514 granularity = 0;
3515 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003516 if (!has_buf_size) {
Wen Congyang48ac0a42015-05-15 15:51:36 +08003517 buf_size = 0;
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003518 }
Fam Zheng0fc9f8e2015-06-08 13:56:08 +08003519 if (!has_unmap) {
3520 unmap = true;
3521 }
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003522 if (!has_filter_node_name) {
3523 filter_node_name = NULL;
3524 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003525
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003526 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003527 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3528 "a value in range [512B, 64MB]");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003529 return;
3530 }
3531 if (granularity & (granularity - 1)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003532 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3533 "power of 2");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003534 return;
3535 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003536
Fam Zheng4193cdd2015-12-24 12:45:03 +08003537 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3538 return;
3539 }
Fam Zhenge40e5022015-12-24 12:45:04 +08003540 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3541 return;
3542 }
Fam Zheng4193cdd2015-12-24 12:45:03 +08003543
3544 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3545 sync = MIRROR_SYNC_MODE_FULL;
3546 }
3547
3548 /* pass the node name to replace to mirror start since it's loose coupling
3549 * and will allow to check whether the node still exist at mirror completion
3550 */
Alberto Garcia71aa9862016-07-05 17:28:57 +03003551 mirror_start(job_id, bs, target,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003552 has_replaces ? replaces : NULL,
Max Reitz274fcce2016-06-10 20:57:47 +02003553 speed, granularity, buf_size, sync, backing_mode,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003554 on_source_error, on_target_error, unmap, filter_node_name,
3555 errp);
Fam Zheng4193cdd2015-12-24 12:45:03 +08003556}
3557
Eric Blakefaecd402016-07-14 16:37:58 -06003558void qmp_drive_mirror(DriveMirror *arg, Error **errp)
Fam Zheng4193cdd2015-12-24 12:45:03 +08003559{
3560 BlockDriverState *bs;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003561 BlockDriverState *source, *target_bs;
3562 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003563 BlockMirrorBackingMode backing_mode;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003564 Error *local_err = NULL;
3565 QDict *options = NULL;
3566 int flags;
3567 int64_t size;
Eric Blakefaecd402016-07-14 16:37:58 -06003568 const char *format = arg->format;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003569
Kevin Wolf0524e932016-06-23 14:20:24 +02003570 bs = qmp_get_root_bs(arg->device, errp);
3571 if (!bs) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003572 return;
3573 }
3574
Kevin Wolf0524e932016-06-23 14:20:24 +02003575 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003576 aio_context_acquire(aio_context);
3577
Eric Blakefaecd402016-07-14 16:37:58 -06003578 if (!arg->has_mode) {
3579 arg->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
Fam Zheng4193cdd2015-12-24 12:45:03 +08003580 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003581
Eric Blakefaecd402016-07-14 16:37:58 -06003582 if (!arg->has_format) {
3583 format = (arg->mode == NEW_IMAGE_MODE_EXISTING
3584 ? NULL : bs->drv->format_name);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003585 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003586
Kevin Wolf61de4c62016-03-18 17:46:45 +01003587 flags = bs->open_flags | BDRV_O_RDWR;
Kevin Wolf760e0062015-06-17 14:55:21 +02003588 source = backing_bs(bs);
Eric Blakefaecd402016-07-14 16:37:58 -06003589 if (!source && arg->sync == MIRROR_SYNC_MODE_TOP) {
3590 arg->sync = MIRROR_SYNC_MODE_FULL;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003591 }
Eric Blakefaecd402016-07-14 16:37:58 -06003592 if (arg->sync == MIRROR_SYNC_MODE_NONE) {
Max Reitz117e0c82013-11-25 20:28:55 +01003593 source = bs;
3594 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003595
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003596 size = bdrv_getlength(bs);
3597 if (size < 0) {
3598 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003599 goto out;
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003600 }
3601
Eric Blakefaecd402016-07-14 16:37:58 -06003602 if (arg->has_replaces) {
Benoît Canet09158f02014-06-27 18:25:25 +02003603 BlockDriverState *to_replace_bs;
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003604 AioContext *replace_aio_context;
3605 int64_t replace_size;
Benoît Canet09158f02014-06-27 18:25:25 +02003606
Eric Blakefaecd402016-07-14 16:37:58 -06003607 if (!arg->has_node_name) {
Benoît Canet09158f02014-06-27 18:25:25 +02003608 error_setg(errp, "a node-name must be provided when replacing a"
3609 " named node of the graph");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003610 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003611 }
3612
Eric Blakefaecd402016-07-14 16:37:58 -06003613 to_replace_bs = check_to_replace_node(bs, arg->replaces, &local_err);
Benoît Canet09158f02014-06-27 18:25:25 +02003614
3615 if (!to_replace_bs) {
3616 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003617 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003618 }
3619
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003620 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3621 aio_context_acquire(replace_aio_context);
3622 replace_size = bdrv_getlength(to_replace_bs);
3623 aio_context_release(replace_aio_context);
3624
3625 if (size != replace_size) {
Benoît Canet09158f02014-06-27 18:25:25 +02003626 error_setg(errp, "cannot replace image with a mirror image of "
3627 "different size");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003628 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003629 }
3630 }
3631
Eric Blakefaecd402016-07-14 16:37:58 -06003632 if (arg->mode == NEW_IMAGE_MODE_ABSOLUTE_PATHS) {
Max Reitz274fcce2016-06-10 20:57:47 +02003633 backing_mode = MIRROR_SOURCE_BACKING_CHAIN;
3634 } else {
3635 backing_mode = MIRROR_OPEN_BACKING_CHAIN;
3636 }
3637
John Snow2a32c6e2017-07-17 20:34:21 -04003638 /* Don't open backing image in create() */
3639 flags |= BDRV_O_NO_BACKING;
3640
Eric Blakefaecd402016-07-14 16:37:58 -06003641 if ((arg->sync == MIRROR_SYNC_MODE_FULL || !source)
3642 && arg->mode != NEW_IMAGE_MODE_EXISTING)
Max Reitz14526862013-11-06 19:50:44 +01003643 {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003644 /* create new image w/o backing file */
Max Reitze6641712015-08-26 19:47:48 +02003645 assert(format);
Eric Blakefaecd402016-07-14 16:37:58 -06003646 bdrv_img_create(arg->target, format,
Fam Zheng92172832017-04-21 20:27:01 +08003647 NULL, NULL, NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003648 } else {
Eric Blakefaecd402016-07-14 16:37:58 -06003649 switch (arg->mode) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003650 case NEW_IMAGE_MODE_EXISTING:
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003651 break;
3652 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3653 /* create new image with backing file */
Eric Blakefaecd402016-07-14 16:37:58 -06003654 bdrv_img_create(arg->target, format,
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003655 source->filename,
3656 source->drv->format_name,
Fam Zheng92172832017-04-21 20:27:01 +08003657 NULL, size, flags, false, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003658 break;
3659 default:
3660 abort();
3661 }
3662 }
3663
Markus Armbruster84d18f02014-01-30 15:07:28 +01003664 if (local_err) {
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003665 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003666 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003667 }
3668
Max Reitze6641712015-08-26 19:47:48 +02003669 options = qdict_new();
Eric Blakefaecd402016-07-14 16:37:58 -06003670 if (arg->has_node_name) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003671 qdict_put_str(options, "node-name", arg->node_name);
Benoît Canet4c828dc2014-06-16 12:00:55 +02003672 }
Max Reitze6641712015-08-26 19:47:48 +02003673 if (format) {
Eric Blake46f5ac22017-04-27 16:58:17 -05003674 qdict_put_str(options, "driver", format);
Max Reitze6641712015-08-26 19:47:48 +02003675 }
Benoît Canet4c828dc2014-06-16 12:00:55 +02003676
Paolo Bonzinib812f672013-01-21 17:09:43 +01003677 /* Mirroring takes care of copy-on-write using the source's backing
3678 * file.
3679 */
John Snow2a32c6e2017-07-17 20:34:21 -04003680 target_bs = bdrv_open(arg->target, NULL, options, flags, errp);
Max Reitz5b363932016-05-17 16:41:31 +02003681 if (!target_bs) {
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003682 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003683 }
3684
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003685 bdrv_set_aio_context(target_bs, aio_context);
3686
Eric Blakefaecd402016-07-14 16:37:58 -06003687 blockdev_mirror_common(arg->has_job_id ? arg->job_id : NULL, bs, target_bs,
3688 arg->has_replaces, arg->replaces, arg->sync,
3689 backing_mode, arg->has_speed, arg->speed,
3690 arg->has_granularity, arg->granularity,
3691 arg->has_buf_size, arg->buf_size,
3692 arg->has_on_source_error, arg->on_source_error,
3693 arg->has_on_target_error, arg->on_target_error,
3694 arg->has_unmap, arg->unmap,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003695 false, NULL,
Fam Zheng4193cdd2015-12-24 12:45:03 +08003696 &local_err);
Kevin Wolfe253f4b2016-04-12 16:17:41 +02003697 bdrv_unref(target_bs);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003698 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003699out:
3700 aio_context_release(aio_context);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003701}
3702
Alberto Garcia71aa9862016-07-05 17:28:57 +03003703void qmp_blockdev_mirror(bool has_job_id, const char *job_id,
3704 const char *device, const char *target,
Fam Zhengdf925622015-12-24 12:45:05 +08003705 bool has_replaces, const char *replaces,
3706 MirrorSyncMode sync,
3707 bool has_speed, int64_t speed,
3708 bool has_granularity, uint32_t granularity,
3709 bool has_buf_size, int64_t buf_size,
3710 bool has_on_source_error,
3711 BlockdevOnError on_source_error,
3712 bool has_on_target_error,
3713 BlockdevOnError on_target_error,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003714 bool has_filter_node_name,
3715 const char *filter_node_name,
Fam Zhengdf925622015-12-24 12:45:05 +08003716 Error **errp)
3717{
3718 BlockDriverState *bs;
Fam Zhengdf925622015-12-24 12:45:05 +08003719 BlockDriverState *target_bs;
3720 AioContext *aio_context;
Max Reitz274fcce2016-06-10 20:57:47 +02003721 BlockMirrorBackingMode backing_mode = MIRROR_LEAVE_BACKING_CHAIN;
Fam Zhengdf925622015-12-24 12:45:05 +08003722 Error *local_err = NULL;
3723
Kevin Wolf07eec652016-06-23 14:20:24 +02003724 bs = qmp_get_root_bs(device, errp);
Fam Zhengdf925622015-12-24 12:45:05 +08003725 if (!bs) {
Fam Zhengdf925622015-12-24 12:45:05 +08003726 return;
3727 }
3728
3729 target_bs = bdrv_lookup_bs(target, target, errp);
3730 if (!target_bs) {
3731 return;
3732 }
3733
3734 aio_context = bdrv_get_aio_context(bs);
3735 aio_context_acquire(aio_context);
3736
Fam Zhengdf925622015-12-24 12:45:05 +08003737 bdrv_set_aio_context(target_bs, aio_context);
3738
Alberto Garcia71aa9862016-07-05 17:28:57 +03003739 blockdev_mirror_common(has_job_id ? job_id : NULL, bs, target_bs,
Max Reitz274fcce2016-06-10 20:57:47 +02003740 has_replaces, replaces, sync, backing_mode,
Fam Zhengdf925622015-12-24 12:45:05 +08003741 has_speed, speed,
3742 has_granularity, granularity,
3743 has_buf_size, buf_size,
3744 has_on_source_error, on_source_error,
3745 has_on_target_error, on_target_error,
3746 true, true,
Kevin Wolf6cdbceb2017-02-20 18:10:05 +01003747 has_filter_node_name, filter_node_name,
Fam Zhengdf925622015-12-24 12:45:05 +08003748 &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003749 error_propagate(errp, local_err);
Fam Zhengdf925622015-12-24 12:45:05 +08003750
3751 aio_context_release(aio_context);
3752}
3753
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003754/* Get a block job using its ID and acquire its AioContext */
3755static BlockJob *find_block_job(const char *id, AioContext **aio_context,
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003756 Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003757{
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003758 BlockJob *job;
3759
3760 assert(id != NULL);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003761
Max Reitz5433c242015-10-19 17:53:29 +02003762 *aio_context = NULL;
3763
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003764 job = block_job_get(id);
3765
3766 if (!job) {
3767 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
3768 "Block job '%s' not found", id);
3769 return NULL;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003770 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003771
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003772 *aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003773 aio_context_acquire(*aio_context);
3774
Alberto Garcia3ddf3ef2016-07-05 17:28:55 +03003775 return job;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003776}
3777
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003778void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003779{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003780 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003781 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003782
3783 if (!job) {
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003784 return;
3785 }
3786
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003787 block_job_set_speed(job, speed, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003788 aio_context_release(aio_context);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003789}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003790
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003791void qmp_block_job_cancel(const char *device,
3792 bool has_force, bool force, Error **errp)
3793{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003794 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003795 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003796
3797 if (!job) {
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003798 return;
3799 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003800
3801 if (!has_force) {
3802 force = false;
3803 }
3804
John Snow0df4ba52016-10-27 12:06:59 -04003805 if (block_job_user_paused(job) && !force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04003806 error_setg(errp, "The block job for device '%s' is currently paused",
3807 device);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003808 goto out;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003809 }
3810
3811 trace_qmp_block_job_cancel(job);
3812 block_job_cancel(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003813out:
3814 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003815}
3816
3817void qmp_block_job_pause(const char *device, Error **errp)
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003818{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003819 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003820 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003821
John Snow0df4ba52016-10-27 12:06:59 -04003822 if (!job || block_job_user_paused(job)) {
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003823 return;
3824 }
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003825
3826 trace_qmp_block_job_pause(job);
John Snow0df4ba52016-10-27 12:06:59 -04003827 block_job_user_pause(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003828 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003829}
3830
3831void qmp_block_job_resume(const char *device, Error **errp)
3832{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003833 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003834 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003835
John Snow0df4ba52016-10-27 12:06:59 -04003836 if (!job || !block_job_user_paused(job)) {
Paolo Bonzini8acc72a2012-09-28 17:22:50 +02003837 return;
3838 }
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003839
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003840 trace_qmp_block_job_resume(job);
John Snow0df4ba52016-10-27 12:06:59 -04003841 block_job_user_resume(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003842 aio_context_release(aio_context);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003843}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00003844
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003845void qmp_block_job_complete(const char *device, Error **errp)
3846{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003847 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003848 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003849
3850 if (!job) {
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003851 return;
3852 }
3853
3854 trace_qmp_block_job_complete(job);
3855 block_job_complete(job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003856 aio_context_release(aio_context);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003857}
3858
Jeff Codyfa40e652014-07-01 09:52:16 +02003859void qmp_change_backing_file(const char *device,
3860 const char *image_node_name,
3861 const char *backing_file,
3862 Error **errp)
3863{
3864 BlockDriverState *bs = NULL;
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003865 AioContext *aio_context;
Jeff Codyfa40e652014-07-01 09:52:16 +02003866 BlockDriverState *image_bs = NULL;
3867 Error *local_err = NULL;
3868 bool ro;
3869 int open_flags;
3870 int ret;
3871
Kevin Wolf7b5dca32016-06-23 14:20:24 +02003872 bs = qmp_get_root_bs(device, errp);
3873 if (!bs) {
Jeff Codyfa40e652014-07-01 09:52:16 +02003874 return;
3875 }
3876
Kevin Wolf7b5dca32016-06-23 14:20:24 +02003877 aio_context = bdrv_get_aio_context(bs);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003878 aio_context_acquire(aio_context);
3879
Jeff Codyfa40e652014-07-01 09:52:16 +02003880 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
3881 if (local_err) {
3882 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003883 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003884 }
3885
3886 if (!image_bs) {
3887 error_setg(errp, "image file not found");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003888 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003889 }
3890
3891 if (bdrv_find_base(image_bs) == image_bs) {
3892 error_setg(errp, "not allowing backing file change on an image "
3893 "without a backing file");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003894 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003895 }
3896
3897 /* even though we are not necessarily operating on bs, we need it to
3898 * determine if block ops are currently prohibited on the chain */
3899 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003900 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003901 }
3902
3903 /* final sanity check */
3904 if (!bdrv_chain_contains(bs, image_bs)) {
3905 error_setg(errp, "'%s' and image file are not in the same chain",
3906 device);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003907 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003908 }
3909
3910 /* if not r/w, reopen to make r/w */
3911 open_flags = image_bs->open_flags;
3912 ro = bdrv_is_read_only(image_bs);
3913
3914 if (ro) {
3915 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
3916 if (local_err) {
3917 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003918 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003919 }
3920 }
3921
3922 ret = bdrv_change_backing_file(image_bs, backing_file,
3923 image_bs->drv ? image_bs->drv->format_name : "");
3924
3925 if (ret < 0) {
3926 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
3927 backing_file);
3928 /* don't exit here, so we can try to restore open flags if
3929 * appropriate */
3930 }
3931
3932 if (ro) {
3933 bdrv_reopen(image_bs, open_flags, &local_err);
Eduardo Habkost621ff942016-06-13 18:57:56 -03003934 error_propagate(errp, local_err);
Jeff Codyfa40e652014-07-01 09:52:16 +02003935 }
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003936
3937out:
3938 aio_context_release(aio_context);
Jeff Codyfa40e652014-07-01 09:52:16 +02003939}
3940
Kevin Wolfabb21ac2016-02-23 17:33:24 +01003941void hmp_drive_add_node(Monitor *mon, const char *optstr)
3942{
3943 QemuOpts *opts;
3944 QDict *qdict;
3945 Error *local_err = NULL;
3946
3947 opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
3948 if (!opts) {
3949 return;
3950 }
3951
3952 qdict = qemu_opts_to_qdict(opts, NULL);
3953
3954 if (!qdict_get_try_str(qdict, "node-name")) {
Kevin Wolff8746fb2016-03-16 11:14:31 +01003955 QDECREF(qdict);
Kevin Wolfabb21ac2016-02-23 17:33:24 +01003956 error_report("'node-name' needs to be specified");
3957 goto out;
3958 }
3959
3960 BlockDriverState *bs = bds_tree_init(qdict, &local_err);
3961 if (!bs) {
3962 error_report_err(local_err);
3963 goto out;
3964 }
3965
3966 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
3967
3968out:
3969 qemu_opts_del(opts);
3970}
3971
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003972void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
3973{
Max Reitzbe4b67b2015-10-19 17:53:09 +02003974 BlockDriverState *bs;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003975 QObject *obj;
Daniel P. Berrange7d5e1992016-09-30 15:45:28 +01003976 Visitor *v = qobject_output_visitor_new(&obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003977 QDict *qdict;
Markus Armbrusterc42e8742017-07-18 08:54:00 +02003978 const QDictEntry *ent;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003979 Error *local_err = NULL;
3980
Eric Blake3b098d52016-06-09 10:48:43 -06003981 visit_type_BlockdevOptions(v, NULL, &options, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003982 if (local_err) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003983 error_propagate(errp, local_err);
3984 goto fail;
3985 }
3986
Eric Blake3b098d52016-06-09 10:48:43 -06003987 visit_complete(v, &obj);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003988 qdict = qobject_to_qdict(obj);
3989
3990 qdict_flatten(qdict);
3991
Markus Armbrusterc42e8742017-07-18 08:54:00 +02003992 /*
3993 * Rewrite "backing": null to "backing": ""
3994 * TODO Rewrite "" to null instead, and perhaps not even here
3995 */
3996 for (ent = qdict_first(qdict); ent; ent = qdict_next(qdict, ent)) {
3997 char *dot = strrchr(ent->key, '.');
3998
3999 if (!strcmp(dot ? dot + 1 : ent->key, "backing")
4000 && qobject_type(ent->value) == QTYPE_QNULL) {
4001 qdict_put(qdict, ent->key, qstring_new());
4002 }
4003 }
4004
Kevin Wolf9ec88732016-09-21 14:56:11 +02004005 if (!qdict_get_try_str(qdict, "node-name")) {
4006 error_setg(errp, "'node-name' must be specified for the root node");
4007 goto fail;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004008 }
4009
Kevin Wolf9ec88732016-09-21 14:56:11 +02004010 bs = bds_tree_init(qdict, errp);
4011 if (!bs) {
4012 goto fail;
4013 }
4014
4015 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
4016
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004017fail:
Eric Blake3b098d52016-06-09 10:48:43 -06004018 visit_free(v);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004019}
4020
Markus Armbruster79b7a772017-03-21 17:53:28 +01004021void qmp_blockdev_del(const char *node_name, Error **errp)
Alberto Garcia81b936a2015-11-02 16:51:55 +02004022{
4023 AioContext *aio_context;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004024 BlockDriverState *bs;
4025
Kevin Wolf9ec88732016-09-21 14:56:11 +02004026 bs = bdrv_find_node(node_name);
4027 if (!bs) {
4028 error_setg(errp, "Cannot find node %s", node_name);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004029 return;
4030 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004031 if (bdrv_has_blk(bs)) {
4032 error_setg(errp, "Node %s is in use", node_name);
4033 return;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004034 }
Kevin Wolf9ec88732016-09-21 14:56:11 +02004035 aio_context = bdrv_get_aio_context(bs);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004036 aio_context_acquire(aio_context);
4037
Kevin Wolf9ec88732016-09-21 14:56:11 +02004038 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
4039 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004040 }
4041
Kevin Wolf9ec88732016-09-21 14:56:11 +02004042 if (!bs->monitor_list.tqe_prev) {
4043 error_setg(errp, "Node %s is not owned by the monitor",
4044 bs->node_name);
4045 goto out;
Alberto Garcia81b936a2015-11-02 16:51:55 +02004046 }
4047
Kevin Wolf9ec88732016-09-21 14:56:11 +02004048 if (bs->refcnt > 1) {
4049 error_setg(errp, "Block device %s is in use",
4050 bdrv_get_device_or_node_name(bs));
4051 goto out;
4052 }
4053
4054 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
4055 bdrv_unref(bs);
4056
Alberto Garcia81b936a2015-11-02 16:51:55 +02004057out:
4058 aio_context_release(aio_context);
4059}
4060
Wen Congyang7f821592016-05-10 15:36:39 +08004061static BdrvChild *bdrv_find_child(BlockDriverState *parent_bs,
4062 const char *child_name)
4063{
4064 BdrvChild *child;
4065
4066 QLIST_FOREACH(child, &parent_bs->children, next) {
4067 if (strcmp(child->name, child_name) == 0) {
4068 return child;
4069 }
4070 }
4071
4072 return NULL;
4073}
4074
4075void qmp_x_blockdev_change(const char *parent, bool has_child,
4076 const char *child, bool has_node,
4077 const char *node, Error **errp)
4078{
4079 BlockDriverState *parent_bs, *new_bs = NULL;
4080 BdrvChild *p_child;
4081
4082 parent_bs = bdrv_lookup_bs(parent, parent, errp);
4083 if (!parent_bs) {
4084 return;
4085 }
4086
4087 if (has_child == has_node) {
4088 if (has_child) {
4089 error_setg(errp, "The parameters child and node are in conflict");
4090 } else {
4091 error_setg(errp, "Either child or node must be specified");
4092 }
4093 return;
4094 }
4095
4096 if (has_child) {
4097 p_child = bdrv_find_child(parent_bs, child);
4098 if (!p_child) {
4099 error_setg(errp, "Node '%s' does not have child '%s'",
4100 parent, child);
4101 return;
4102 }
4103 bdrv_del_child(parent_bs, p_child, errp);
4104 }
4105
4106 if (has_node) {
4107 new_bs = bdrv_find_node(node);
4108 if (!new_bs) {
4109 error_setg(errp, "Node '%s' not found", node);
4110 return;
4111 }
4112 bdrv_add_child(parent_bs, new_bs, errp);
4113 }
4114}
4115
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004116BlockJobInfoList *qmp_query_block_jobs(Error **errp)
4117{
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004118 BlockJobInfoList *head = NULL, **p_next = &head;
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004119 BlockJob *job;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004120
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004121 for (job = block_job_next(NULL); job; job = block_job_next(job)) {
John Snow559b9352016-10-27 12:06:55 -04004122 BlockJobInfoList *elem;
4123 AioContext *aio_context;
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004124
John Snow559b9352016-10-27 12:06:55 -04004125 if (block_job_is_internal(job)) {
4126 continue;
4127 }
4128 elem = g_new0(BlockJobInfoList, 1);
4129 aio_context = blk_get_aio_context(job->blk);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004130 aio_context_acquire(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004131 elem->value = block_job_query(job, errp);
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004132 aio_context_release(aio_context);
John Snow559b9352016-10-27 12:06:55 -04004133 if (!elem->value) {
4134 g_free(elem);
4135 qapi_free_BlockJobInfoList(head);
4136 return NULL;
4137 }
Alberto Garciaf0f55de2016-05-27 12:53:37 +02004138 *p_next = elem;
4139 p_next = &elem->next;
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004140 }
4141
4142 return head;
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004143}
Paolo Bonzini4d454572012-11-26 16:03:42 +01004144
Kevin Wolf00063832013-03-15 10:35:07 +01004145QemuOptsList qemu_common_drive_opts = {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004146 .name = "drive",
Kevin Wolf00063832013-03-15 10:35:07 +01004147 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
Paolo Bonzini4d454572012-11-26 16:03:42 +01004148 .desc = {
4149 {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004150 .name = "snapshot",
4151 .type = QEMU_OPT_BOOL,
4152 .help = "enable/disable snapshot mode",
4153 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004154 .name = "aio",
4155 .type = QEMU_OPT_STRING,
4156 .help = "host AIO implementation (threads, native)",
4157 },{
Kevin Wolfe4b24b42016-03-15 15:39:42 +01004158 .name = BDRV_OPT_CACHE_WB,
4159 .type = QEMU_OPT_BOOL,
4160 .help = "Enable writeback mode",
4161 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004162 .name = "format",
4163 .type = QEMU_OPT_STRING,
4164 .help = "disk format (raw, qcow2, ...)",
4165 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004166 .name = "rerror",
4167 .type = QEMU_OPT_STRING,
4168 .help = "read error action",
4169 },{
4170 .name = "werror",
4171 .type = QEMU_OPT_STRING,
4172 .help = "write error action",
4173 },{
Alberto Garcia4e200cf2016-09-15 17:53:05 +03004174 .name = BDRV_OPT_READ_ONLY,
Paolo Bonzini4d454572012-11-26 16:03:42 +01004175 .type = QEMU_OPT_BOOL,
4176 .help = "open drive file as read-only",
Pradeep Jagadeesha2a78622017-02-28 10:31:46 +01004177 },
4178
4179 THROTTLE_OPTS,
4180
4181 {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02004182 .name = "throttling.group",
4183 .type = QEMU_OPT_STRING,
4184 .help = "name of the block throttling group",
4185 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004186 .name = "copy-on-read",
4187 .type = QEMU_OPT_BOOL,
4188 .help = "copy read data from backing file into image file",
Peter Lieven465bee12014-05-18 00:58:19 +02004189 },{
4190 .name = "detect-zeroes",
4191 .type = QEMU_OPT_STRING,
4192 .help = "try to optimize zero writes (off, on, unmap)",
Alberto Garcia362e9292015-10-28 17:33:04 +02004193 },{
4194 .name = "stats-account-invalid",
4195 .type = QEMU_OPT_BOOL,
4196 .help = "whether to account for invalid I/O operations "
4197 "in the statistics",
4198 },{
4199 .name = "stats-account-failed",
4200 .type = QEMU_OPT_BOOL,
4201 .help = "whether to account for failed I/O operations "
4202 "in the statistics",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004203 },
4204 { /* end of list */ }
4205 },
4206};
Kevin Wolf00063832013-03-15 10:35:07 +01004207
4208QemuOptsList qemu_drive_opts = {
4209 .name = "drive",
4210 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4211 .desc = {
Kevin Wolf492fdc62013-06-19 13:44:17 +02004212 /*
4213 * no elements => accept any params
4214 * validation will happen later
4215 */
Kevin Wolf00063832013-03-15 10:35:07 +01004216 { /* end of list */ }
4217 },
4218};