blob: 00a77dc750169f4bddb7c87b930d88c7880e6502 [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"
Kevin Wolfd26c9a12013-09-23 15:26:03 +020046#include "qapi/qmp-output-visitor.h"
Peter Lieven9e7dac72014-08-13 19:20:17 +020047#include "qapi/util.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010048#include "sysemu/sysemu.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010049#include "block/block_int.h"
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -020050#include "qmp-commands.h"
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +000051#include "trace.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010052#include "sysemu/arch_init.h"
Veronia Bahaaf348b6d2016-03-20 19:16:19 +020053#include "qemu/cutils.h"
54#include "qemu/help_option.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020055
Max Reitz9c4218e2016-01-29 16:36:12 +010056static QTAILQ_HEAD(, BlockDriverState) monitor_bdrv_states =
57 QTAILQ_HEAD_INITIALIZER(monitor_bdrv_states);
58
Markus Armbruster19609662011-01-28 11:21:39 +010059static const char *const if_name[IF_COUNT] = {
60 [IF_NONE] = "none",
61 [IF_IDE] = "ide",
62 [IF_SCSI] = "scsi",
63 [IF_FLOPPY] = "floppy",
64 [IF_PFLASH] = "pflash",
65 [IF_MTD] = "mtd",
66 [IF_SD] = "sd",
67 [IF_VIRTIO] = "virtio",
68 [IF_XEN] = "xen",
69};
70
John Snow21dff8c2014-10-01 14:19:25 -040071static int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010072 /*
73 * Do not change these numbers! They govern how drive option
74 * index maps to unit and bus. That mapping is ABI.
75 *
76 * All controllers used to imlement if=T drives need to support
77 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
78 * Otherwise, some index values map to "impossible" bus, unit
79 * values.
80 *
81 * For instance, if you change [IF_SCSI] to 255, -drive
82 * if=scsi,index=12 no longer means bus=1,unit=5, but
83 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
84 * the drive can't be set up. Regression.
85 */
86 [IF_IDE] = 2,
87 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +010088};
89
John Snow21dff8c2014-10-01 14:19:25 -040090/**
91 * Boards may call this to offer board-by-board overrides
92 * of the default, global values.
93 */
94void override_max_devs(BlockInterfaceType type, int max_devs)
95{
Markus Armbruster18e46a02014-10-07 13:59:06 +020096 BlockBackend *blk;
John Snow21dff8c2014-10-01 14:19:25 -040097 DriveInfo *dinfo;
98
99 if (max_devs <= 0) {
100 return;
101 }
102
Markus Armbruster18e46a02014-10-07 13:59:06 +0200103 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
104 dinfo = blk_legacy_dinfo(blk);
John Snow21dff8c2014-10-01 14:19:25 -0400105 if (dinfo->type == type) {
106 fprintf(stderr, "Cannot override units-per-bus property of"
107 " the %s interface, because a drive of that type has"
108 " already been added.\n", if_name[type]);
109 g_assert_not_reached();
110 }
111 }
112
113 if_max_devs[type] = max_devs;
114}
115
Markus Armbruster14bafc52010-06-25 08:09:10 +0200116/*
117 * We automatically delete the drive when a device using it gets
118 * unplugged. Questionable feature, but we can't just drop it.
119 * Device models call blockdev_mark_auto_del() to schedule the
120 * automatic deletion, and generic qdev code calls blockdev_auto_del()
121 * when deletion is actually safe.
122 */
Markus Armbruster4be74632014-10-07 13:59:18 +0200123void blockdev_mark_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200124{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200125 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster4be74632014-10-07 13:59:18 +0200126 BlockDriverState *bs = blk_bs(blk);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100127 AioContext *aio_context;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200128
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200129 if (!dinfo) {
Kevin Wolf2d246f02013-09-18 15:14:47 +0200130 return;
131 }
132
Max Reitz5433c242015-10-19 17:53:29 +0200133 if (bs) {
134 aio_context = bdrv_get_aio_context(bs);
135 aio_context_acquire(aio_context);
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100136
Max Reitz5433c242015-10-19 17:53:29 +0200137 if (bs->job) {
138 block_job_cancel(bs->job);
139 }
140
141 aio_context_release(aio_context);
Paolo Bonzini12bde0e2012-03-30 13:17:10 +0200142 }
Stefan Hajnoczi91fddb02014-10-21 12:03:52 +0100143
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200144 dinfo->auto_del = 1;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200145}
146
Markus Armbruster4be74632014-10-07 13:59:18 +0200147void blockdev_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200148{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200149 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200150
Ryan Harper0fc0f1f2010-12-08 10:05:00 -0600151 if (dinfo && dinfo->auto_del) {
Max Reitzefaa7c42016-03-16 19:54:38 +0100152 monitor_remove_blk(blk);
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +0200153 blk_unref(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200154 }
155}
156
John Snowd8f94e12014-10-01 14:19:27 -0400157/**
158 * Returns the current mapping of how many units per bus
159 * a particular interface can support.
160 *
161 * A positive integer indicates n units per bus.
162 * 0 implies the mapping has not been established.
163 * -1 indicates an invalid BlockInterfaceType was given.
164 */
165int drive_get_max_devs(BlockInterfaceType type)
166{
167 if (type >= IF_IDE && type < IF_COUNT) {
168 return if_max_devs[type];
169 }
170
171 return -1;
172}
173
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100174static int drive_index_to_bus_id(BlockInterfaceType type, int index)
175{
176 int max_devs = if_max_devs[type];
177 return max_devs ? index / max_devs : 0;
178}
179
180static int drive_index_to_unit_id(BlockInterfaceType type, int index)
181{
182 int max_devs = if_max_devs[type];
183 return max_devs ? index % max_devs : index;
184}
185
Markus Armbruster2292dda2011-01-28 11:21:41 +0100186QemuOpts *drive_def(const char *optstr)
187{
Markus Armbruster70b94332015-02-13 12:50:26 +0100188 return qemu_opts_parse_noisily(qemu_find_opts("drive"), optstr, false);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100189}
190
191QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100192 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200193{
Markus Armbruster666daa62010-06-02 18:48:27 +0200194 QemuOpts *opts;
195
Markus Armbruster2292dda2011-01-28 11:21:41 +0100196 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200197 if (!opts) {
198 return NULL;
199 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100200 if (type != IF_DEFAULT) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100201 qemu_opt_set(opts, "if", if_name[type], &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100202 }
203 if (index >= 0) {
Markus Armbrustera8b18f82015-02-13 15:50:43 +0100204 qemu_opt_set_number(opts, "index", index, &error_abort);
Markus Armbruster2292dda2011-01-28 11:21:41 +0100205 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200206 if (file)
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100207 qemu_opt_set(opts, "file", file, &error_abort);
Markus Armbruster666daa62010-06-02 18:48:27 +0200208 return opts;
209}
210
211DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
212{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200213 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200214 DriveInfo *dinfo;
215
Markus Armbruster18e46a02014-10-07 13:59:06 +0200216 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
217 dinfo = blk_legacy_dinfo(blk);
218 if (dinfo && dinfo->type == type
219 && dinfo->bus == bus && dinfo->unit == unit) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200220 return dinfo;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200221 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200222 }
223
224 return NULL;
225}
226
John Snowa66c9dc2014-10-01 14:19:24 -0400227bool drive_check_orphaned(void)
228{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200229 BlockBackend *blk;
John Snowa66c9dc2014-10-01 14:19:24 -0400230 DriveInfo *dinfo;
231 bool rs = false;
232
Markus Armbruster18e46a02014-10-07 13:59:06 +0200233 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
234 dinfo = blk_legacy_dinfo(blk);
John Snowa66c9dc2014-10-01 14:19:24 -0400235 /* If dinfo->bdrv->dev is NULL, it has no device attached. */
236 /* Unless this is a default drive, this may be an oversight. */
Markus Armbrustera7f53e22014-10-07 13:59:25 +0200237 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
John Snowa66c9dc2014-10-01 14:19:24 -0400238 dinfo->type != IF_NONE) {
239 fprintf(stderr, "Warning: Orphaned drive without device: "
240 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
Max Reitz5433c242015-10-19 17:53:29 +0200241 blk_name(blk), blk_bs(blk) ? blk_bs(blk)->filename : "",
242 if_name[dinfo->type], dinfo->bus, dinfo->unit);
John Snowa66c9dc2014-10-01 14:19:24 -0400243 rs = true;
244 }
245 }
246
247 return rs;
248}
249
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100250DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
251{
252 return drive_get(type,
253 drive_index_to_bus_id(type, index),
254 drive_index_to_unit_id(type, index));
255}
256
Markus Armbruster666daa62010-06-02 18:48:27 +0200257int drive_get_max_bus(BlockInterfaceType type)
258{
259 int max_bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200260 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200261 DriveInfo *dinfo;
262
263 max_bus = -1;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200264 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
265 dinfo = blk_legacy_dinfo(blk);
266 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200267 max_bus = dinfo->bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200268 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200269 }
270 return max_bus;
271}
272
Markus Armbruster13839972011-01-28 11:21:37 +0100273/* Get a block device. This should only be used for single-drive devices
274 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
275 appropriate bus. */
276DriveInfo *drive_get_next(BlockInterfaceType type)
277{
278 static int next_block_unit[IF_COUNT];
279
280 return drive_get(type, 0, next_block_unit[type]++);
281}
282
Markus Armbruster666daa62010-06-02 18:48:27 +0200283static void bdrv_format_print(void *opaque, const char *name)
284{
Markus Armbruster807105a2011-01-17 19:31:27 +0100285 error_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200286}
287
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000288typedef struct {
289 QEMUBH *bh;
Fam Zhengfa510eb2013-08-23 09:14:51 +0800290 BlockDriverState *bs;
291} BDRVPutRefBH;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000292
Kevin Wolfb6810722013-09-20 11:33:11 +0200293static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200294{
295 if (!strcmp(buf, "ignore")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200296 return BLOCKDEV_ON_ERROR_IGNORE;
Markus Armbruster666daa62010-06-02 18:48:27 +0200297 } else if (!is_read && !strcmp(buf, "enospc")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200298 return BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200299 } else if (!strcmp(buf, "stop")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200300 return BLOCKDEV_ON_ERROR_STOP;
Markus Armbruster666daa62010-06-02 18:48:27 +0200301 } else if (!strcmp(buf, "report")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200302 return BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200303 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200304 error_setg(errp, "'%s' invalid %s error action",
305 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200306 return -1;
307 }
308}
309
Alberto Garcia40119ef2015-11-16 11:28:38 +0200310static bool parse_stats_intervals(BlockAcctStats *stats, QList *intervals,
311 Error **errp)
312{
313 const QListEntry *entry;
314 for (entry = qlist_first(intervals); entry; entry = qlist_next(entry)) {
315 switch (qobject_type(entry->value)) {
316
317 case QTYPE_QSTRING: {
318 unsigned long long length;
319 const char *str = qstring_get_str(qobject_to_qstring(entry->value));
320 if (parse_uint_full(str, &length, 10) == 0 &&
321 length > 0 && length <= UINT_MAX) {
322 block_acct_add_interval(stats, (unsigned) length);
323 } else {
324 error_setg(errp, "Invalid interval length: %s", str);
325 return false;
326 }
327 break;
328 }
329
330 case QTYPE_QINT: {
331 int64_t length = qint_get_int(qobject_to_qint(entry->value));
332 if (length > 0 && length <= UINT_MAX) {
333 block_acct_add_interval(stats, (unsigned) length);
334 } else {
335 error_setg(errp, "Invalid interval length: %" PRId64, length);
336 return false;
337 }
338 break;
339 }
340
341 default:
342 error_setg(errp, "The specification of stats-intervals is invalid");
343 return false;
344 }
345 }
346 return true;
347}
348
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200349typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
350
Max Reitzfbf81752015-10-19 17:53:31 +0200351/* All parameters but @opts are optional and may be set to NULL. */
352static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
353 const char **throttling_group, ThrottleConfig *throttle_cfg,
354 BlockdevDetectZeroesOptions *detect_zeroes, Error **errp)
355{
356 const char *discard;
357 Error *local_error = NULL;
358 const char *aio;
359
360 if (bdrv_flags) {
361 if (!qemu_opt_get_bool(opts, "read-only", false)) {
362 *bdrv_flags |= BDRV_O_RDWR;
363 }
364 if (qemu_opt_get_bool(opts, "copy-on-read", false)) {
365 *bdrv_flags |= BDRV_O_COPY_ON_READ;
366 }
367
368 if ((discard = qemu_opt_get(opts, "discard")) != NULL) {
369 if (bdrv_parse_discard_flags(discard, bdrv_flags) != 0) {
370 error_setg(errp, "Invalid discard option");
371 return;
372 }
373 }
374
Max Reitzfbf81752015-10-19 17:53:31 +0200375 if ((aio = qemu_opt_get(opts, "aio")) != NULL) {
376 if (!strcmp(aio, "native")) {
377 *bdrv_flags |= BDRV_O_NATIVE_AIO;
378 } else if (!strcmp(aio, "threads")) {
379 /* this is the default */
380 } else {
381 error_setg(errp, "invalid aio option");
382 return;
383 }
384 }
385 }
386
387 /* disk I/O throttling */
388 if (throttling_group) {
389 *throttling_group = qemu_opt_get(opts, "throttling.group");
390 }
391
392 if (throttle_cfg) {
Alberto Garcia1588ab52016-02-18 12:27:00 +0200393 throttle_config_init(throttle_cfg);
Max Reitzfbf81752015-10-19 17:53:31 +0200394 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].avg =
395 qemu_opt_get_number(opts, "throttling.bps-total", 0);
396 throttle_cfg->buckets[THROTTLE_BPS_READ].avg =
397 qemu_opt_get_number(opts, "throttling.bps-read", 0);
398 throttle_cfg->buckets[THROTTLE_BPS_WRITE].avg =
399 qemu_opt_get_number(opts, "throttling.bps-write", 0);
400 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].avg =
401 qemu_opt_get_number(opts, "throttling.iops-total", 0);
402 throttle_cfg->buckets[THROTTLE_OPS_READ].avg =
403 qemu_opt_get_number(opts, "throttling.iops-read", 0);
404 throttle_cfg->buckets[THROTTLE_OPS_WRITE].avg =
405 qemu_opt_get_number(opts, "throttling.iops-write", 0);
406
407 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].max =
408 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
409 throttle_cfg->buckets[THROTTLE_BPS_READ].max =
410 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
411 throttle_cfg->buckets[THROTTLE_BPS_WRITE].max =
412 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
413 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].max =
414 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
415 throttle_cfg->buckets[THROTTLE_OPS_READ].max =
416 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
417 throttle_cfg->buckets[THROTTLE_OPS_WRITE].max =
418 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
419
Alberto Garcia8a0fc182016-02-18 12:27:02 +0200420 throttle_cfg->buckets[THROTTLE_BPS_TOTAL].burst_length =
421 qemu_opt_get_number(opts, "throttling.bps-total-max-length", 1);
422 throttle_cfg->buckets[THROTTLE_BPS_READ].burst_length =
423 qemu_opt_get_number(opts, "throttling.bps-read-max-length", 1);
424 throttle_cfg->buckets[THROTTLE_BPS_WRITE].burst_length =
425 qemu_opt_get_number(opts, "throttling.bps-write-max-length", 1);
426 throttle_cfg->buckets[THROTTLE_OPS_TOTAL].burst_length =
427 qemu_opt_get_number(opts, "throttling.iops-total-max-length", 1);
428 throttle_cfg->buckets[THROTTLE_OPS_READ].burst_length =
429 qemu_opt_get_number(opts, "throttling.iops-read-max-length", 1);
430 throttle_cfg->buckets[THROTTLE_OPS_WRITE].burst_length =
431 qemu_opt_get_number(opts, "throttling.iops-write-max-length", 1);
432
Max Reitzfbf81752015-10-19 17:53:31 +0200433 throttle_cfg->op_size =
434 qemu_opt_get_number(opts, "throttling.iops-size", 0);
435
Alberto Garciad5851082016-02-18 12:26:59 +0200436 if (!throttle_is_valid(throttle_cfg, errp)) {
Max Reitzfbf81752015-10-19 17:53:31 +0200437 return;
438 }
439 }
440
441 if (detect_zeroes) {
442 *detect_zeroes =
443 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
444 qemu_opt_get(opts, "detect-zeroes"),
Eric Blake7fb1cf12015-11-18 01:52:57 -0700445 BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
Max Reitzfbf81752015-10-19 17:53:31 +0200446 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
447 &local_error);
448 if (local_error) {
449 error_propagate(errp, local_error);
450 return;
451 }
452
453 if (bdrv_flags &&
454 *detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
455 !(*bdrv_flags & BDRV_O_UNMAP))
456 {
457 error_setg(errp, "setting detect-zeroes to unmap is not allowed "
458 "without setting discard operation to unmap");
459 return;
460 }
461 }
462}
463
Kevin Wolff298d072013-09-10 12:01:20 +0200464/* Takes the ownership of bs_opts */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200465static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
466 Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200467{
468 const char *buf;
Markus Armbruster666daa62010-06-02 18:48:27 +0200469 int bdrv_flags = 0;
470 int on_read_error, on_write_error;
Alberto Garcia362e9292015-10-28 17:33:04 +0200471 bool account_invalid, account_failed;
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100472 bool writethrough;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200473 BlockBackend *blk;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200474 BlockDriverState *bs;
Benoît Canetcc0681c2013-09-02 14:14:39 +0200475 ThrottleConfig cfg;
Markus Armbruster666daa62010-06-02 18:48:27 +0200476 int snapshot = 0;
Stefan Hajnoczic5461942013-02-13 16:53:42 +0100477 Error *error = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100478 QemuOpts *opts;
Alberto Garcia40119ef2015-11-16 11:28:38 +0200479 QDict *interval_dict = NULL;
480 QList *interval_list = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100481 const char *id;
Max Reitzfbf81752015-10-19 17:53:31 +0200482 BlockdevDetectZeroesOptions detect_zeroes =
483 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF;
484 const char *throttling_group = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200485
Kevin Wolff298d072013-09-10 12:01:20 +0200486 /* Check common options by copying from bs_opts to opts, all other options
487 * stay in bs_opts for processing by bdrv_open(). */
488 id = qdict_get_try_str(bs_opts, "id");
Kevin Wolf00063832013-03-15 10:35:07 +0100489 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100490 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200491 error_propagate(errp, error);
Markus Armbruster6376f952014-05-28 11:17:01 +0200492 goto err_no_opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100493 }
494
Kevin Wolf00063832013-03-15 10:35:07 +0100495 qemu_opts_absorb_qdict(opts, bs_opts, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100496 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200497 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100498 goto early_err;
Kevin Wolf00063832013-03-15 10:35:07 +0100499 }
500
501 if (id) {
502 qdict_del(bs_opts, "id");
503 }
504
Markus Armbruster666daa62010-06-02 18:48:27 +0200505 /* extract parameters */
Markus Armbruster666daa62010-06-02 18:48:27 +0200506 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
Markus Armbruster666daa62010-06-02 18:48:27 +0200507
Alberto Garcia362e9292015-10-28 17:33:04 +0200508 account_invalid = qemu_opt_get_bool(opts, "stats-account-invalid", true);
509 account_failed = qemu_opt_get_bool(opts, "stats-account-failed", true);
510
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100511 writethrough = !qemu_opt_get_bool(opts, BDRV_OPT_CACHE_WB, true);
512
Alberto Garcia40119ef2015-11-16 11:28:38 +0200513 qdict_extract_subqdict(bs_opts, &interval_dict, "stats-intervals.");
514 qdict_array_split(interval_dict, &interval_list);
515
516 if (qdict_size(interval_dict) != 0) {
517 error_setg(errp, "Invalid option stats-intervals.%s",
518 qdict_first(interval_dict)->key);
519 goto early_err;
520 }
Alberto Garcia2be55062015-10-28 17:33:07 +0200521
Max Reitzfbf81752015-10-19 17:53:31 +0200522 extract_common_blockdev_options(opts, &bdrv_flags, &throttling_group, &cfg,
523 &detect_zeroes, &error);
524 if (error) {
525 error_propagate(errp, error);
526 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200527 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200528
529 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
Peter Maydellc8057f92012-08-02 13:45:54 +0100530 if (is_help_option(buf)) {
531 error_printf("Supported formats:");
532 bdrv_iterate_format(bdrv_format_print, NULL);
533 error_printf("\n");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100534 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200535 }
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200536
Max Reitze4342ce2015-02-05 13:58:14 -0500537 if (qdict_haskey(bs_opts, "driver")) {
538 error_setg(errp, "Cannot specify both 'driver' and 'format'");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100539 goto early_err;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400540 }
Max Reitze4342ce2015-02-05 13:58:14 -0500541 qdict_put(bs_opts, "driver", qstring_from_str(buf));
Markus Armbruster666daa62010-06-02 18:48:27 +0200542 }
543
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200544 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200545 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200546 on_write_error = parse_block_error_action(buf, 0, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100547 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200548 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100549 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200550 }
551 }
552
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200553 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200554 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200555 on_read_error = parse_block_error_action(buf, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100556 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200557 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100558 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200559 }
560 }
561
Max Reitz5ec18f82015-10-19 17:53:30 +0200562 if (snapshot) {
Kevin Wolf91a097e2015-05-08 17:49:53 +0200563 bdrv_flags |= BDRV_O_SNAPSHOT;
Max Reitz5ec18f82015-10-19 17:53:30 +0200564 }
565
Kevin Wolf326642b2013-07-11 12:52:34 +0200566 /* init */
Kevin Wolf39c4ae92015-11-13 14:45:42 +0100567 if ((!file || !*file) && !qdict_size(bs_opts)) {
Max Reitz5ec18f82015-10-19 17:53:30 +0200568 BlockBackendRootState *blk_rs;
569
Max Reitzefaa7c42016-03-16 19:54:38 +0100570 blk = blk_new(errp);
Max Reitze4342ce2015-02-05 13:58:14 -0500571 if (!blk) {
572 goto early_err;
573 }
574
Max Reitz5ec18f82015-10-19 17:53:30 +0200575 blk_rs = blk_get_root_state(blk);
576 blk_rs->open_flags = bdrv_flags;
Max Reitzfbf81752015-10-19 17:53:31 +0200577 blk_rs->read_only = !(bdrv_flags & BDRV_O_RDWR);
Max Reitz5ec18f82015-10-19 17:53:30 +0200578 blk_rs->detect_zeroes = detect_zeroes;
579
580 if (throttle_enabled(&cfg)) {
581 if (!throttling_group) {
582 throttling_group = blk_name(blk);
583 }
584 blk_rs->throttle_group = g_strdup(throttling_group);
585 blk_rs->throttle_state = throttle_group_incref(throttling_group);
586 blk_rs->throttle_state->cfg = cfg;
587 }
Max Reitze4342ce2015-02-05 13:58:14 -0500588
589 QDECREF(bs_opts);
590 } else {
591 if (file && !*file) {
592 file = NULL;
593 }
594
Kevin Wolf91a097e2015-05-08 17:49:53 +0200595 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
596 * with other callers) rather than what we want as the real defaults.
597 * Apply the defaults here instead. */
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100598 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_WB, writethrough ? "off" : "on");
Kevin Wolf91a097e2015-05-08 17:49:53 +0200599 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
600 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
Kevin Wolf72e775c2016-03-15 14:34:37 +0100601 assert((bdrv_flags & BDRV_O_CACHE_MASK) == 0);
Kevin Wolf91a097e2015-05-08 17:49:53 +0200602
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100603 if (runstate_check(RUN_STATE_INMIGRATE)) {
604 bdrv_flags |= BDRV_O_INACTIVE;
605 }
606
Max Reitzefaa7c42016-03-16 19:54:38 +0100607 blk = blk_new_open(file, NULL, bs_opts, bdrv_flags, errp);
Max Reitze4342ce2015-02-05 13:58:14 -0500608 if (!blk) {
609 goto err_no_bs_opts;
610 }
611 bs = blk_bs(blk);
Max Reitze4342ce2015-02-05 13:58:14 -0500612
Max Reitz5ec18f82015-10-19 17:53:30 +0200613 bs->detect_zeroes = detect_zeroes;
614
615 /* disk I/O throttling */
616 if (throttle_enabled(&cfg)) {
617 if (!throttling_group) {
618 throttling_group = blk_name(blk);
619 }
620 bdrv_io_limits_enable(bs, throttling_group);
621 bdrv_set_io_limits(bs, &cfg);
622 }
623
624 if (bdrv_key_required(bs)) {
625 autostart = 0;
626 }
Alberto Garcia362e9292015-10-28 17:33:04 +0200627
628 block_acct_init(blk_get_stats(blk), account_invalid, account_failed);
Alberto Garcia2be55062015-10-28 17:33:07 +0200629
Alberto Garcia40119ef2015-11-16 11:28:38 +0200630 if (!parse_stats_intervals(blk_get_stats(blk), interval_list, errp)) {
631 blk_unref(blk);
632 blk = NULL;
633 goto err_no_bs_opts;
Alberto Garcia2be55062015-10-28 17:33:07 +0200634 }
Max Reitz5ec18f82015-10-19 17:53:30 +0200635 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200636
Kevin Wolfe4b24b42016-03-15 15:39:42 +0100637 blk_set_enable_write_cache(blk, !writethrough);
Max Reitz373340b2015-10-19 17:53:22 +0200638 blk_set_on_error(blk, on_read_error, on_write_error);
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200639
Max Reitzefaa7c42016-03-16 19:54:38 +0100640 if (!monitor_add_blk(blk, qemu_opts_id(opts), errp)) {
641 blk_unref(blk);
642 blk = NULL;
643 goto err_no_bs_opts;
644 }
645
Max Reitze4342ce2015-02-05 13:58:14 -0500646err_no_bs_opts:
Kevin Wolf00063832013-03-15 10:35:07 +0100647 qemu_opts_del(opts);
Alberto Garcia40119ef2015-11-16 11:28:38 +0200648 QDECREF(interval_dict);
649 QDECREF(interval_list);
Markus Armbruster18e46a02014-10-07 13:59:06 +0200650 return blk;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100651
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100652early_err:
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100653 qemu_opts_del(opts);
Alberto Garcia40119ef2015-11-16 11:28:38 +0200654 QDECREF(interval_dict);
655 QDECREF(interval_list);
Markus Armbruster6376f952014-05-28 11:17:01 +0200656err_no_opts:
657 QDECREF(bs_opts);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100658 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200659}
660
Max Reitzbd745e22015-10-19 17:53:32 +0200661static QemuOptsList qemu_root_bds_opts;
662
663/* Takes the ownership of bs_opts */
664static BlockDriverState *bds_tree_init(QDict *bs_opts, Error **errp)
665{
666 BlockDriverState *bs;
667 QemuOpts *opts;
668 Error *local_error = NULL;
669 BlockdevDetectZeroesOptions detect_zeroes;
670 int ret;
671 int bdrv_flags = 0;
672
673 opts = qemu_opts_create(&qemu_root_bds_opts, NULL, 1, errp);
674 if (!opts) {
675 goto fail;
676 }
677
678 qemu_opts_absorb_qdict(opts, bs_opts, &local_error);
679 if (local_error) {
680 error_propagate(errp, local_error);
681 goto fail;
682 }
683
684 extract_common_blockdev_options(opts, &bdrv_flags, NULL, NULL,
685 &detect_zeroes, &local_error);
686 if (local_error) {
687 error_propagate(errp, local_error);
688 goto fail;
689 }
690
Kevin Wolfa81d6162016-03-07 14:23:04 +0100691 /* bdrv_open() defaults to the values in bdrv_flags (for compatibility
692 * with other callers) rather than what we want as the real defaults.
693 * Apply the defaults here instead. */
694 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_WB, "on");
695 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_DIRECT, "off");
696 qdict_set_default_str(bs_opts, BDRV_OPT_CACHE_NO_FLUSH, "off");
697
Kevin Wolf12d5ee32016-02-19 16:48:10 +0100698 if (runstate_check(RUN_STATE_INMIGRATE)) {
699 bdrv_flags |= BDRV_O_INACTIVE;
700 }
701
Max Reitzbd745e22015-10-19 17:53:32 +0200702 bs = NULL;
703 ret = bdrv_open(&bs, NULL, NULL, bs_opts, bdrv_flags, errp);
704 if (ret < 0) {
705 goto fail_no_bs_opts;
706 }
707
708 bs->detect_zeroes = detect_zeroes;
709
710fail_no_bs_opts:
711 qemu_opts_del(opts);
712 return bs;
713
714fail:
715 qemu_opts_del(opts);
716 QDECREF(bs_opts);
717 return NULL;
718}
719
Max Reitz9c4218e2016-01-29 16:36:12 +0100720void blockdev_close_all_bdrv_states(void)
721{
722 BlockDriverState *bs, *next_bs;
723
724 QTAILQ_FOREACH_SAFE(bs, &monitor_bdrv_states, monitor_list, next_bs) {
725 AioContext *ctx = bdrv_get_aio_context(bs);
726
727 aio_context_acquire(ctx);
728 bdrv_unref(bs);
729 aio_context_release(ctx);
730 }
731}
732
Max Reitz262b4e82016-03-16 19:54:41 +0100733/* Iterates over the list of monitor-owned BlockDriverStates */
734BlockDriverState *bdrv_next_monitor_owned(BlockDriverState *bs)
735{
736 return bs ? QTAILQ_NEXT(bs, monitor_list)
737 : QTAILQ_FIRST(&monitor_bdrv_states);
738}
739
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200740static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
741 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200742{
743 const char *value;
744
745 value = qemu_opt_get(opts, from);
746 if (value) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200747 if (qemu_opt_find(opts, to)) {
748 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
749 "same time", to, from);
750 return;
751 }
Jun Li20d6cd42014-09-24 13:45:27 +0800752 }
753
754 /* rename all items in opts */
755 while ((value = qemu_opt_get(opts, from))) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +0100756 qemu_opt_set(opts, to, value, &error_abort);
Kevin Wolf57975222013-07-17 14:41:54 +0200757 qemu_opt_unset(opts, from);
758 }
759}
760
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200761QemuOptsList qemu_legacy_drive_opts = {
762 .name = "drive",
763 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
764 .desc = {
765 {
Kevin Wolf87a899c2013-09-10 15:48:13 +0200766 .name = "bus",
767 .type = QEMU_OPT_NUMBER,
768 .help = "bus number",
769 },{
770 .name = "unit",
771 .type = QEMU_OPT_NUMBER,
772 .help = "unit number (i.e. lun for scsi)",
773 },{
774 .name = "index",
775 .type = QEMU_OPT_NUMBER,
776 .help = "index number",
777 },{
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200778 .name = "media",
779 .type = QEMU_OPT_STRING,
780 .help = "media type (disk, cdrom)",
Kevin Wolf593d4642013-08-28 17:24:51 +0200781 },{
782 .name = "if",
783 .type = QEMU_OPT_STRING,
784 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
Kevin Wolfb41a7332013-09-09 16:49:49 +0200785 },{
786 .name = "cyls",
787 .type = QEMU_OPT_NUMBER,
788 .help = "number of cylinders (ide disk geometry)",
789 },{
790 .name = "heads",
791 .type = QEMU_OPT_NUMBER,
792 .help = "number of heads (ide disk geometry)",
793 },{
794 .name = "secs",
795 .type = QEMU_OPT_NUMBER,
796 .help = "number of sectors (ide disk geometry)",
797 },{
798 .name = "trans",
799 .type = QEMU_OPT_STRING,
800 .help = "chs translation (auto, lba, none)",
Kevin Wolf26929292013-09-09 17:01:03 +0200801 },{
802 .name = "boot",
803 .type = QEMU_OPT_BOOL,
804 .help = "(deprecated, ignored)",
Kevin Wolf394c7d42013-09-13 14:09:17 +0200805 },{
806 .name = "addr",
807 .type = QEMU_OPT_STRING,
808 .help = "pci address (virtio only)",
Max Reitzd095b462013-12-20 19:28:14 +0100809 },{
Kevin Wolfbcf83152014-06-06 15:21:48 +0200810 .name = "serial",
811 .type = QEMU_OPT_STRING,
812 .help = "disk serial number",
813 },{
Max Reitzd095b462013-12-20 19:28:14 +0100814 .name = "file",
815 .type = QEMU_OPT_STRING,
816 .help = "file name",
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200817 },
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200818
819 /* Options that are passed on, but have special semantics with -drive */
820 {
821 .name = "read-only",
822 .type = QEMU_OPT_BOOL,
823 .help = "open drive file as read-only",
824 },{
Kevin Wolfee13ed12014-02-09 09:52:32 +0100825 .name = "rerror",
826 .type = QEMU_OPT_STRING,
827 .help = "read error action",
828 },{
829 .name = "werror",
830 .type = QEMU_OPT_STRING,
831 .help = "write error action",
832 },{
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200833 .name = "copy-on-read",
834 .type = QEMU_OPT_BOOL,
835 .help = "copy read data from backing file into image file",
836 },
837
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200838 { /* end of list */ }
839 },
840};
841
Markus Armbruster60e19e02014-06-06 14:50:58 +0200842DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
Kevin Wolf57975222013-07-17 14:41:54 +0200843{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200844 const char *value;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200845 BlockBackend *blk;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200846 DriveInfo *dinfo = NULL;
Kevin Wolff298d072013-09-10 12:01:20 +0200847 QDict *bs_opts;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200848 QemuOpts *legacy_opts;
849 DriveMediaType media = MEDIA_DISK;
Kevin Wolf593d4642013-08-28 17:24:51 +0200850 BlockInterfaceType type;
Kevin Wolfb41a7332013-09-09 16:49:49 +0200851 int cyls, heads, secs, translation;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200852 int max_devs, bus_id, unit_id, index;
Kevin Wolf394c7d42013-09-13 14:09:17 +0200853 const char *devaddr;
Kevin Wolfee13ed12014-02-09 09:52:32 +0100854 const char *werror, *rerror;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800855 bool read_only = false;
856 bool copy_on_read;
Kevin Wolfbcf83152014-06-06 15:21:48 +0200857 const char *serial;
Max Reitzd095b462013-12-20 19:28:14 +0100858 const char *filename;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200859 Error *local_err = NULL;
Kevin Wolf247147f2014-09-24 16:37:14 +0200860 int i;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200861
Kevin Wolf57975222013-07-17 14:41:54 +0200862 /* Change legacy command line options into QMP ones */
Kevin Wolf247147f2014-09-24 16:37:14 +0200863 static const struct {
864 const char *from;
865 const char *to;
866 } opt_renames[] = {
867 { "iops", "throttling.iops-total" },
868 { "iops_rd", "throttling.iops-read" },
869 { "iops_wr", "throttling.iops-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200870
Kevin Wolf247147f2014-09-24 16:37:14 +0200871 { "bps", "throttling.bps-total" },
872 { "bps_rd", "throttling.bps-read" },
873 { "bps_wr", "throttling.bps-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200874
Kevin Wolf247147f2014-09-24 16:37:14 +0200875 { "iops_max", "throttling.iops-total-max" },
876 { "iops_rd_max", "throttling.iops-read-max" },
877 { "iops_wr_max", "throttling.iops-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200878
Kevin Wolf247147f2014-09-24 16:37:14 +0200879 { "bps_max", "throttling.bps-total-max" },
880 { "bps_rd_max", "throttling.bps-read-max" },
881 { "bps_wr_max", "throttling.bps-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200882
Kevin Wolf247147f2014-09-24 16:37:14 +0200883 { "iops_size", "throttling.iops-size" },
Benoît Canet2024c1d2013-09-02 14:14:41 +0200884
Alberto Garcia76f4afb2015-06-08 18:17:44 +0200885 { "group", "throttling.group" },
886
Kevin Wolf247147f2014-09-24 16:37:14 +0200887 { "readonly", "read-only" },
888 };
889
890 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200891 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
892 &local_err);
893 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +0100894 error_report_err(local_err);
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200895 return NULL;
896 }
Kevin Wolf247147f2014-09-24 16:37:14 +0200897 }
Kevin Wolf0f227a92013-07-19 20:07:29 +0200898
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200899 value = qemu_opt_get(all_opts, "cache");
900 if (value) {
901 int flags = 0;
902
903 if (bdrv_parse_cache_flags(value, &flags) != 0) {
904 error_report("invalid cache option");
905 return NULL;
906 }
907
908 /* Specific options take precedence */
Kevin Wolf54861b92015-04-07 16:55:00 +0200909 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_WB)) {
910 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_WB,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100911 !!(flags & BDRV_O_CACHE_WB), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200912 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200913 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_DIRECT)) {
914 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_DIRECT,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100915 !!(flags & BDRV_O_NOCACHE), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200916 }
Kevin Wolf54861b92015-04-07 16:55:00 +0200917 if (!qemu_opt_get(all_opts, BDRV_OPT_CACHE_NO_FLUSH)) {
918 qemu_opt_set_bool(all_opts, BDRV_OPT_CACHE_NO_FLUSH,
Markus Armbrustercccb7962015-02-12 16:37:44 +0100919 !!(flags & BDRV_O_NO_FLUSH), &error_abort);
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200920 }
921 qemu_opt_unset(all_opts, "cache");
922 }
923
Kevin Wolff298d072013-09-10 12:01:20 +0200924 /* Get a QDict for processing the options */
925 bs_opts = qdict_new();
926 qemu_opts_to_qdict(all_opts, bs_opts);
927
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800928 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
929 &error_abort);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200930 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100931 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +0100932 error_report_err(local_err);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200933 goto fail;
934 }
935
Kevin Wolf26929292013-09-09 17:01:03 +0200936 /* Deprecated option boot=[on|off] */
937 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
938 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
939 "ignored. Future versions will reject this parameter. Please "
940 "update your scripts.\n");
941 }
942
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200943 /* Media type */
944 value = qemu_opt_get(legacy_opts, "media");
945 if (value) {
946 if (!strcmp(value, "disk")) {
947 media = MEDIA_DISK;
948 } else if (!strcmp(value, "cdrom")) {
949 media = MEDIA_CDROM;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800950 read_only = true;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200951 } else {
952 error_report("'%s' invalid media", value);
953 goto fail;
954 }
955 }
956
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200957 /* copy-on-read is disabled with a warning for read-only devices */
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800958 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200959 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
960
961 if (read_only && copy_on_read) {
962 error_report("warning: disabling copy-on-read on read-only drive");
963 copy_on_read = false;
964 }
965
966 qdict_put(bs_opts, "read-only",
967 qstring_from_str(read_only ? "on" : "off"));
968 qdict_put(bs_opts, "copy-on-read",
969 qstring_from_str(copy_on_read ? "on" :"off"));
970
Kevin Wolf593d4642013-08-28 17:24:51 +0200971 /* Controller type */
972 value = qemu_opt_get(legacy_opts, "if");
973 if (value) {
974 for (type = 0;
975 type < IF_COUNT && strcmp(value, if_name[type]);
976 type++) {
977 }
978 if (type == IF_COUNT) {
979 error_report("unsupported bus type '%s'", value);
980 goto fail;
981 }
982 } else {
983 type = block_default_type;
984 }
985
Kevin Wolfb41a7332013-09-09 16:49:49 +0200986 /* Geometry */
987 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
988 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
989 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
990
991 if (cyls || heads || secs) {
992 if (cyls < 1) {
993 error_report("invalid physical cyls number");
994 goto fail;
995 }
996 if (heads < 1) {
997 error_report("invalid physical heads number");
998 goto fail;
999 }
1000 if (secs < 1) {
1001 error_report("invalid physical secs number");
1002 goto fail;
1003 }
1004 }
1005
1006 translation = BIOS_ATA_TRANSLATION_AUTO;
1007 value = qemu_opt_get(legacy_opts, "trans");
1008 if (value != NULL) {
1009 if (!cyls) {
1010 error_report("'%s' trans must be used with cyls, heads and secs",
1011 value);
1012 goto fail;
1013 }
1014 if (!strcmp(value, "none")) {
1015 translation = BIOS_ATA_TRANSLATION_NONE;
1016 } else if (!strcmp(value, "lba")) {
1017 translation = BIOS_ATA_TRANSLATION_LBA;
Paolo Bonzinif31c41f2014-02-08 11:01:54 +01001018 } else if (!strcmp(value, "large")) {
1019 translation = BIOS_ATA_TRANSLATION_LARGE;
1020 } else if (!strcmp(value, "rechs")) {
1021 translation = BIOS_ATA_TRANSLATION_RECHS;
Kevin Wolfb41a7332013-09-09 16:49:49 +02001022 } else if (!strcmp(value, "auto")) {
1023 translation = BIOS_ATA_TRANSLATION_AUTO;
1024 } else {
1025 error_report("'%s' invalid translation type", value);
1026 goto fail;
1027 }
1028 }
1029
1030 if (media == MEDIA_CDROM) {
1031 if (cyls || secs || heads) {
1032 error_report("CHS can't be set with media=cdrom");
1033 goto fail;
1034 }
1035 }
1036
Kevin Wolf87a899c2013-09-10 15:48:13 +02001037 /* Device address specified by bus/unit or index.
1038 * If none was specified, try to find the first free one. */
1039 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
1040 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
1041 index = qemu_opt_get_number(legacy_opts, "index", -1);
1042
1043 max_devs = if_max_devs[type];
1044
1045 if (index != -1) {
1046 if (bus_id != 0 || unit_id != -1) {
1047 error_report("index cannot be used with bus and unit");
1048 goto fail;
1049 }
1050 bus_id = drive_index_to_bus_id(type, index);
1051 unit_id = drive_index_to_unit_id(type, index);
1052 }
1053
1054 if (unit_id == -1) {
1055 unit_id = 0;
1056 while (drive_get(type, bus_id, unit_id) != NULL) {
1057 unit_id++;
1058 if (max_devs && unit_id >= max_devs) {
1059 unit_id -= max_devs;
1060 bus_id++;
1061 }
1062 }
1063 }
1064
1065 if (max_devs && unit_id >= max_devs) {
1066 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
1067 goto fail;
1068 }
1069
1070 if (drive_get(type, bus_id, unit_id) != NULL) {
1071 error_report("drive with bus=%d, unit=%d (index=%d) exists",
1072 bus_id, unit_id, index);
1073 goto fail;
1074 }
1075
Kevin Wolfbcf83152014-06-06 15:21:48 +02001076 /* Serial number */
1077 serial = qemu_opt_get(legacy_opts, "serial");
1078
Kevin Wolf87a899c2013-09-10 15:48:13 +02001079 /* no id supplied -> create one */
1080 if (qemu_opts_id(all_opts) == NULL) {
1081 char *new_id;
1082 const char *mediastr = "";
1083 if (type == IF_IDE || type == IF_SCSI) {
1084 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
1085 }
1086 if (max_devs) {
1087 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
1088 mediastr, unit_id);
1089 } else {
1090 new_id = g_strdup_printf("%s%s%i", if_name[type],
1091 mediastr, unit_id);
1092 }
1093 qdict_put(bs_opts, "id", qstring_from_str(new_id));
1094 g_free(new_id);
1095 }
1096
Kevin Wolf394c7d42013-09-13 14:09:17 +02001097 /* Add virtio block device */
1098 devaddr = qemu_opt_get(legacy_opts, "addr");
1099 if (devaddr && type != IF_VIRTIO) {
1100 error_report("addr is not supported by this bus type");
1101 goto fail;
1102 }
1103
1104 if (type == IF_VIRTIO) {
1105 QemuOpts *devopts;
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -08001106 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
1107 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001108 if (arch_type == QEMU_ARCH_S390X) {
Alexander Graf1f68f1d2015-06-16 23:06:33 +02001109 qemu_opt_set(devopts, "driver", "virtio-blk-ccw", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001110 } else {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001111 qemu_opt_set(devopts, "driver", "virtio-blk-pci", &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001112 }
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001113 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"),
1114 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001115 if (devaddr) {
Markus Armbrusterf43e47d2015-02-12 17:52:20 +01001116 qemu_opt_set(devopts, "addr", devaddr, &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +02001117 }
1118 }
1119
Max Reitzd095b462013-12-20 19:28:14 +01001120 filename = qemu_opt_get(legacy_opts, "file");
1121
Kevin Wolfee13ed12014-02-09 09:52:32 +01001122 /* Check werror/rerror compatibility with if=... */
1123 werror = qemu_opt_get(legacy_opts, "werror");
1124 if (werror != NULL) {
1125 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
1126 type != IF_NONE) {
1127 error_report("werror is not supported by this bus type");
1128 goto fail;
1129 }
1130 qdict_put(bs_opts, "werror", qstring_from_str(werror));
1131 }
1132
1133 rerror = qemu_opt_get(legacy_opts, "rerror");
1134 if (rerror != NULL) {
1135 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
1136 type != IF_NONE) {
1137 error_report("rerror is not supported by this bus type");
1138 goto fail;
1139 }
1140 qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
1141 }
1142
Kevin Wolf2d246f02013-09-18 15:14:47 +02001143 /* Actual block device init: Functionality shared with blockdev-add */
Markus Armbruster18e46a02014-10-07 13:59:06 +02001144 blk = blockdev_init(filename, bs_opts, &local_err);
Markus Armbruster3cb0e252014-05-28 11:17:02 +02001145 bs_opts = NULL;
Markus Armbruster18e46a02014-10-07 13:59:06 +02001146 if (!blk) {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001147 if (local_err) {
Markus Armbruster565f65d2015-02-12 13:55:05 +01001148 error_report_err(local_err);
Kevin Wolfb6810722013-09-20 11:33:11 +02001149 }
Kevin Wolf2d246f02013-09-18 15:14:47 +02001150 goto fail;
Kevin Wolfb6810722013-09-20 11:33:11 +02001151 } else {
Markus Armbruster84d18f02014-01-30 15:07:28 +01001152 assert(!local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001153 }
1154
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001155 /* Create legacy DriveInfo */
1156 dinfo = g_malloc0(sizeof(*dinfo));
Kevin Wolff298d072013-09-10 12:01:20 +02001157 dinfo->opts = all_opts;
Kevin Wolf2d246f02013-09-18 15:14:47 +02001158
Kevin Wolfb41a7332013-09-09 16:49:49 +02001159 dinfo->cyls = cyls;
1160 dinfo->heads = heads;
1161 dinfo->secs = secs;
1162 dinfo->trans = translation;
1163
Kevin Wolfee13ed12014-02-09 09:52:32 +01001164 dinfo->type = type;
Kevin Wolf87a899c2013-09-10 15:48:13 +02001165 dinfo->bus = bus_id;
1166 dinfo->unit = unit_id;
Kevin Wolf394c7d42013-09-13 14:09:17 +02001167 dinfo->devaddr = devaddr;
Kevin Wolfbcf83152014-06-06 15:21:48 +02001168 dinfo->serial = g_strdup(serial);
1169
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001170 blk_set_legacy_dinfo(blk, dinfo);
1171
Kevin Wolfe34ef042013-09-19 14:24:10 +02001172 switch(type) {
1173 case IF_IDE:
1174 case IF_SCSI:
1175 case IF_XEN:
1176 case IF_NONE:
1177 dinfo->media_cd = media == MEDIA_CDROM;
1178 break;
1179 default:
1180 break;
1181 }
1182
Kevin Wolf2d246f02013-09-18 15:14:47 +02001183fail:
Kevin Wolf33cb7dc2013-08-28 17:00:13 +02001184 qemu_opts_del(legacy_opts);
Markus Armbruster3cb0e252014-05-28 11:17:02 +02001185 QDECREF(bs_opts);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001186 return dinfo;
Kevin Wolf57975222013-07-17 14:41:54 +02001187}
1188
Markus Armbruster3e5a50d2015-02-06 13:55:43 +01001189void hmp_commit(Monitor *mon, const QDict *qdict)
Markus Armbruster666daa62010-06-02 18:48:27 +02001190{
Markus Armbruster666daa62010-06-02 18:48:27 +02001191 const char *device = qdict_get_str(qdict, "device");
Fam Zhenga0e85442015-03-02 19:36:48 +08001192 BlockBackend *blk;
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001193 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +02001194
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001195 if (!strcmp(device, "all")) {
Max Reitzda31d592016-03-16 19:54:32 +01001196 ret = blk_commit_all();
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001197 } else {
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001198 BlockDriverState *bs;
1199 AioContext *aio_context;
1200
Fam Zhenga0e85442015-03-02 19:36:48 +08001201 blk = blk_by_name(device);
1202 if (!blk) {
Jeff Cody58513bd2013-01-18 12:45:35 -05001203 monitor_printf(mon, "Device '%s' not found\n", device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001204 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001205 }
Max Reitz5433c242015-10-19 17:53:29 +02001206 if (!blk_is_available(blk)) {
1207 monitor_printf(mon, "Device '%s' has no medium\n", device);
1208 return;
1209 }
Stefan Hajnoczi84aa0142015-11-04 20:27:23 +03001210
1211 bs = blk_bs(blk);
1212 aio_context = bdrv_get_aio_context(bs);
1213 aio_context_acquire(aio_context);
1214
1215 ret = bdrv_commit(bs);
1216
1217 aio_context_release(aio_context);
Jeff Cody58513bd2013-01-18 12:45:35 -05001218 }
1219 if (ret < 0) {
1220 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1221 strerror(-ret));
Markus Armbruster666daa62010-06-02 18:48:27 +02001222 }
1223}
1224
Eric Blake10f75902016-03-03 09:16:50 -07001225static void blockdev_do_action(TransactionAction *action, Error **errp)
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001226{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001227 TransactionActionList list;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001228
Eric Blake10f75902016-03-03 09:16:50 -07001229 list.value = action;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001230 list.next = NULL;
John Snow94d16a62015-11-05 18:13:18 -05001231 qmp_transaction(&list, false, NULL, errp);
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001232}
1233
Benoît Canet0901f672014-01-23 21:31:38 +01001234void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1235 bool has_node_name, const char *node_name,
1236 const char *snapshot_file,
1237 bool has_snapshot_node_name,
1238 const char *snapshot_node_name,
Luiz Capitulino6106e242011-11-25 16:15:19 -02001239 bool has_format, const char *format,
Benoît Canet0901f672014-01-23 21:31:38 +01001240 bool has_mode, NewImageMode mode, Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +01001241{
Alberto Garciaa911e6a2015-10-26 14:27:14 +02001242 BlockdevSnapshotSync snapshot = {
Benoît Canet0901f672014-01-23 21:31:38 +01001243 .has_device = has_device,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001244 .device = (char *) device,
Benoît Canet0901f672014-01-23 21:31:38 +01001245 .has_node_name = has_node_name,
1246 .node_name = (char *) node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001247 .snapshot_file = (char *) snapshot_file,
Benoît Canet0901f672014-01-23 21:31:38 +01001248 .has_snapshot_node_name = has_snapshot_node_name,
1249 .snapshot_node_name = (char *) snapshot_node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001250 .has_format = has_format,
1251 .format = (char *) format,
1252 .has_mode = has_mode,
1253 .mode = mode,
1254 };
Eric Blake10f75902016-03-03 09:16:50 -07001255 TransactionAction action = {
1256 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001257 .u.blockdev_snapshot_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001258 };
1259 blockdev_do_action(&action, errp);
Jes Sorensenf8882562010-12-16 13:52:16 +01001260}
1261
Alberto Garcia43de7e22015-10-26 14:27:16 +02001262void qmp_blockdev_snapshot(const char *node, const char *overlay,
1263 Error **errp)
1264{
1265 BlockdevSnapshot snapshot_data = {
1266 .node = (char *) node,
1267 .overlay = (char *) overlay
1268 };
Eric Blake10f75902016-03-03 09:16:50 -07001269 TransactionAction action = {
1270 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT,
Eric Blake32bafa82016-03-17 16:48:37 -06001271 .u.blockdev_snapshot.data = &snapshot_data,
Eric Blake10f75902016-03-03 09:16:50 -07001272 };
1273 blockdev_do_action(&action, errp);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001274}
1275
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001276void qmp_blockdev_snapshot_internal_sync(const char *device,
1277 const char *name,
1278 Error **errp)
1279{
1280 BlockdevSnapshotInternal snapshot = {
1281 .device = (char *) device,
1282 .name = (char *) name
1283 };
Eric Blake10f75902016-03-03 09:16:50 -07001284 TransactionAction action = {
1285 .type = TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
Eric Blake32bafa82016-03-17 16:48:37 -06001286 .u.blockdev_snapshot_internal_sync.data = &snapshot,
Eric Blake10f75902016-03-03 09:16:50 -07001287 };
1288 blockdev_do_action(&action, errp);
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001289}
1290
Wenchao Xia44e3e052013-09-11 14:04:36 +08001291SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1292 bool has_id,
1293 const char *id,
1294 bool has_name,
1295 const char *name,
1296 Error **errp)
1297{
Fam Zhenga0e85442015-03-02 19:36:48 +08001298 BlockDriverState *bs;
1299 BlockBackend *blk;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001300 AioContext *aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001301 QEMUSnapshotInfo sn;
1302 Error *local_err = NULL;
1303 SnapshotInfo *info = NULL;
1304 int ret;
1305
Fam Zhenga0e85442015-03-02 19:36:48 +08001306 blk = blk_by_name(device);
1307 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01001308 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1309 "Device '%s' not found", device);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001310 return NULL;
1311 }
Max Reitz5433c242015-10-19 17:53:29 +02001312
1313 aio_context = blk_get_aio_context(blk);
1314 aio_context_acquire(aio_context);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001315
1316 if (!has_id) {
1317 id = NULL;
1318 }
1319
1320 if (!has_name) {
1321 name = NULL;
1322 }
1323
1324 if (!id && !name) {
1325 error_setg(errp, "Name or id must be provided");
Max Reitz5433c242015-10-19 17:53:29 +02001326 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001327 }
1328
Max Reitz5433c242015-10-19 17:53:29 +02001329 if (!blk_is_available(blk)) {
1330 error_setg(errp, "Device '%s' has no medium", device);
1331 goto out_aio_context;
1332 }
1333 bs = blk_bs(blk);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001334
Stefan Hajnoczi0b928852014-11-19 14:19:43 +00001335 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT_DELETE, errp)) {
1336 goto out_aio_context;
1337 }
1338
Wenchao Xia44e3e052013-09-11 14:04:36 +08001339 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001340 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001341 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001342 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001343 }
1344 if (!ret) {
1345 error_setg(errp,
1346 "Snapshot with id '%s' and name '%s' does not exist on "
1347 "device '%s'",
1348 STR_OR_NULL(id), STR_OR_NULL(name), device);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001349 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001350 }
1351
1352 bdrv_snapshot_delete(bs, id, name, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001353 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001354 error_propagate(errp, local_err);
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001355 goto out_aio_context;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001356 }
1357
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001358 aio_context_release(aio_context);
1359
Markus Armbruster5839e532014-08-19 10:31:08 +02001360 info = g_new0(SnapshotInfo, 1);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001361 info->id = g_strdup(sn.id_str);
1362 info->name = g_strdup(sn.name);
1363 info->date_nsec = sn.date_nsec;
1364 info->date_sec = sn.date_sec;
1365 info->vm_state_size = sn.vm_state_size;
1366 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1367 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1368
1369 return info;
Stefan Hajnoczi4ef39822014-11-19 14:19:42 +00001370
1371out_aio_context:
1372 aio_context_release(aio_context);
1373 return NULL;
Wenchao Xia44e3e052013-09-11 14:04:36 +08001374}
Jeff Cody8802d1f2012-02-28 15:54:06 -05001375
John Snow341ebc22015-04-17 19:49:52 -04001376/**
1377 * block_dirty_bitmap_lookup:
1378 * Return a dirty bitmap (if present), after validating
1379 * the node reference and bitmap names.
1380 *
1381 * @node: The name of the BDS node to search for bitmaps
1382 * @name: The name of the bitmap to search for
1383 * @pbs: Output pointer for BDS lookup, if desired. Can be NULL.
1384 * @paio: Output pointer for aio_context acquisition, if desired. Can be NULL.
1385 * @errp: Output pointer for error information. Can be NULL.
1386 *
1387 * @return: A bitmap object on success, or NULL on failure.
1388 */
1389static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
1390 const char *name,
1391 BlockDriverState **pbs,
1392 AioContext **paio,
1393 Error **errp)
1394{
1395 BlockDriverState *bs;
1396 BdrvDirtyBitmap *bitmap;
1397 AioContext *aio_context;
1398
1399 if (!node) {
1400 error_setg(errp, "Node cannot be NULL");
1401 return NULL;
1402 }
1403 if (!name) {
1404 error_setg(errp, "Bitmap name cannot be NULL");
1405 return NULL;
1406 }
1407 bs = bdrv_lookup_bs(node, node, NULL);
1408 if (!bs) {
1409 error_setg(errp, "Node '%s' not found", node);
1410 return NULL;
1411 }
1412
1413 aio_context = bdrv_get_aio_context(bs);
1414 aio_context_acquire(aio_context);
1415
1416 bitmap = bdrv_find_dirty_bitmap(bs, name);
1417 if (!bitmap) {
1418 error_setg(errp, "Dirty bitmap '%s' not found", name);
1419 goto fail;
1420 }
1421
1422 if (pbs) {
1423 *pbs = bs;
1424 }
1425 if (paio) {
1426 *paio = aio_context;
1427 } else {
1428 aio_context_release(aio_context);
1429 }
1430
1431 return bitmap;
1432
1433 fail:
1434 aio_context_release(aio_context);
1435 return NULL;
1436}
1437
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00001438/* New and old BlockDriverState structs for atomic group operations */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001439
John Snow50f43f02015-11-05 18:13:09 -05001440typedef struct BlkActionState BlkActionState;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001441
John Snow50f43f02015-11-05 18:13:09 -05001442/**
1443 * BlkActionOps:
1444 * Table of operations that define an Action.
1445 *
1446 * @instance_size: Size of state struct, in bytes.
1447 * @prepare: Prepare the work, must NOT be NULL.
1448 * @commit: Commit the changes, can be NULL.
1449 * @abort: Abort the changes on fail, can be NULL.
1450 * @clean: Clean up resources after all transaction actions have called
1451 * commit() or abort(). Can be NULL.
1452 *
1453 * Only prepare() may fail. In a single transaction, only one of commit() or
1454 * abort() will be called. clean() will always be called if it is present.
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001455 */
John Snow50f43f02015-11-05 18:13:09 -05001456typedef struct BlkActionOps {
1457 size_t instance_size;
1458 void (*prepare)(BlkActionState *common, Error **errp);
1459 void (*commit)(BlkActionState *common);
1460 void (*abort)(BlkActionState *common);
1461 void (*clean)(BlkActionState *common);
1462} BlkActionOps;
1463
1464/**
1465 * BlkActionState:
1466 * Describes one Action's state within a Transaction.
1467 *
1468 * @action: QAPI-defined enum identifying which Action to perform.
1469 * @ops: Table of ActionOps this Action can perform.
John Snow94d16a62015-11-05 18:13:18 -05001470 * @block_job_txn: Transaction which this action belongs to.
John Snow50f43f02015-11-05 18:13:09 -05001471 * @entry: List membership for all Actions in this Transaction.
1472 *
1473 * This structure must be arranged as first member in a subclassed type,
1474 * assuming that the compiler will also arrange it to the same offsets as the
1475 * base class.
1476 */
1477struct BlkActionState {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001478 TransactionAction *action;
John Snow50f43f02015-11-05 18:13:09 -05001479 const BlkActionOps *ops;
John Snow94d16a62015-11-05 18:13:18 -05001480 BlockJobTxn *block_job_txn;
1481 TransactionProperties *txn_props;
John Snow50f43f02015-11-05 18:13:09 -05001482 QSIMPLEQ_ENTRY(BlkActionState) entry;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001483};
1484
Wenchao Xiabbe86012013-09-11 14:04:34 +08001485/* internal snapshot private data */
1486typedef struct InternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001487 BlkActionState common;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001488 BlockDriverState *bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001489 AioContext *aio_context;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001490 QEMUSnapshotInfo sn;
Fam Zheng507306c2015-10-23 11:08:13 +08001491 bool created;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001492} InternalSnapshotState;
1493
John Snow94d16a62015-11-05 18:13:18 -05001494
1495static int action_check_completion_mode(BlkActionState *s, Error **errp)
1496{
1497 if (s->txn_props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
1498 error_setg(errp,
1499 "Action '%s' does not support Transaction property "
1500 "completion-mode = %s",
1501 TransactionActionKind_lookup[s->action->type],
1502 ActionCompletionMode_lookup[s->txn_props->completion_mode]);
1503 return -1;
1504 }
1505 return 0;
1506}
1507
John Snow50f43f02015-11-05 18:13:09 -05001508static void internal_snapshot_prepare(BlkActionState *common,
Wenchao Xiabbe86012013-09-11 14:04:34 +08001509 Error **errp)
1510{
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001511 Error *local_err = NULL;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001512 const char *device;
1513 const char *name;
Fam Zhenga0e85442015-03-02 19:36:48 +08001514 BlockBackend *blk;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001515 BlockDriverState *bs;
1516 QEMUSnapshotInfo old_sn, *sn;
1517 bool ret;
1518 qemu_timeval tv;
1519 BlockdevSnapshotInternal *internal;
1520 InternalSnapshotState *state;
1521 int ret1;
1522
Eric Blake6a8f9662015-10-26 16:34:54 -06001523 g_assert(common->action->type ==
Wenchao Xiabbe86012013-09-11 14:04:34 +08001524 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
Eric Blake32bafa82016-03-17 16:48:37 -06001525 internal = common->action->u.blockdev_snapshot_internal_sync.data;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001526 state = DO_UPCAST(InternalSnapshotState, common, common);
1527
1528 /* 1. parse input */
1529 device = internal->device;
1530 name = internal->name;
1531
1532 /* 2. check for validation */
John Snow94d16a62015-11-05 18:13:18 -05001533 if (action_check_completion_mode(common, errp) < 0) {
1534 return;
1535 }
1536
Fam Zhenga0e85442015-03-02 19:36:48 +08001537 blk = blk_by_name(device);
1538 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01001539 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1540 "Device '%s' not found", device);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001541 return;
1542 }
1543
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001544 /* AioContext is released in .clean() */
Max Reitz5433c242015-10-19 17:53:29 +02001545 state->aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001546 aio_context_acquire(state->aio_context);
1547
Max Reitz5433c242015-10-19 17:53:29 +02001548 if (!blk_is_available(blk)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001549 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001550 return;
1551 }
Max Reitz5433c242015-10-19 17:53:29 +02001552 bs = blk_bs(blk);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001553
Fam Zheng507306c2015-10-23 11:08:13 +08001554 state->bs = bs;
1555 bdrv_drained_begin(bs);
1556
Stefan Hajnoczi3dc7ca32014-11-21 10:49:00 +00001557 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_INTERNAL_SNAPSHOT, errp)) {
1558 return;
1559 }
1560
Wenchao Xiabbe86012013-09-11 14:04:34 +08001561 if (bdrv_is_read_only(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001562 error_setg(errp, "Device '%s' is read only", device);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001563 return;
1564 }
1565
1566 if (!bdrv_can_snapshot(bs)) {
Alberto Garcia81e5f782015-04-08 12:29:19 +03001567 error_setg(errp, "Block format '%s' used by device '%s' "
1568 "does not support internal snapshots",
1569 bs->drv->format_name, device);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001570 return;
1571 }
1572
1573 if (!strlen(name)) {
1574 error_setg(errp, "Name is empty");
1575 return;
1576 }
1577
1578 /* check whether a snapshot with name exist */
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001579 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1580 &local_err);
1581 if (local_err) {
1582 error_propagate(errp, local_err);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001583 return;
1584 } else if (ret) {
1585 error_setg(errp,
1586 "Snapshot with name '%s' already exists on device '%s'",
1587 name, device);
1588 return;
1589 }
1590
1591 /* 3. take the snapshot */
1592 sn = &state->sn;
1593 pstrcpy(sn->name, sizeof(sn->name), name);
1594 qemu_gettimeofday(&tv);
1595 sn->date_sec = tv.tv_sec;
1596 sn->date_nsec = tv.tv_usec * 1000;
1597 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1598
1599 ret1 = bdrv_snapshot_create(bs, sn);
1600 if (ret1 < 0) {
1601 error_setg_errno(errp, -ret1,
1602 "Failed to create snapshot '%s' on device '%s'",
1603 name, device);
1604 return;
1605 }
1606
1607 /* 4. succeed, mark a snapshot is created */
Fam Zheng507306c2015-10-23 11:08:13 +08001608 state->created = true;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001609}
1610
John Snow50f43f02015-11-05 18:13:09 -05001611static void internal_snapshot_abort(BlkActionState *common)
Wenchao Xiabbe86012013-09-11 14:04:34 +08001612{
1613 InternalSnapshotState *state =
1614 DO_UPCAST(InternalSnapshotState, common, common);
1615 BlockDriverState *bs = state->bs;
1616 QEMUSnapshotInfo *sn = &state->sn;
1617 Error *local_error = NULL;
1618
Fam Zheng507306c2015-10-23 11:08:13 +08001619 if (!state->created) {
Wenchao Xiabbe86012013-09-11 14:04:34 +08001620 return;
1621 }
1622
1623 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
Markus Armbrusterc29b77f2015-12-18 16:35:14 +01001624 error_reportf_err(local_error,
1625 "Failed to delete snapshot with id '%s' and "
1626 "name '%s' on device '%s' in abort: ",
1627 sn->id_str, sn->name,
1628 bdrv_get_device_name(bs));
Wenchao Xiabbe86012013-09-11 14:04:34 +08001629 }
1630}
1631
John Snow50f43f02015-11-05 18:13:09 -05001632static void internal_snapshot_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001633{
1634 InternalSnapshotState *state = DO_UPCAST(InternalSnapshotState,
1635 common, common);
1636
1637 if (state->aio_context) {
Fam Zheng507306c2015-10-23 11:08:13 +08001638 if (state->bs) {
1639 bdrv_drained_end(state->bs);
1640 }
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001641 aio_context_release(state->aio_context);
1642 }
1643}
1644
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001645/* external snapshot private data */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001646typedef struct ExternalSnapshotState {
John Snow50f43f02015-11-05 18:13:09 -05001647 BlkActionState common;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001648 BlockDriverState *old_bs;
1649 BlockDriverState *new_bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001650 AioContext *aio_context;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001651} ExternalSnapshotState;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001652
John Snow50f43f02015-11-05 18:13:09 -05001653static void external_snapshot_prepare(BlkActionState *common,
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001654 Error **errp)
1655{
Alberto Garcia43de7e22015-10-26 14:27:16 +02001656 int flags = 0, ret;
1657 QDict *options = NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001658 Error *local_err = NULL;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001659 /* Device and node name of the image to generate the snapshot from */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001660 const char *device;
Benoît Canet0901f672014-01-23 21:31:38 +01001661 const char *node_name;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001662 /* Reference to the new image (for 'blockdev-snapshot') */
1663 const char *snapshot_ref;
1664 /* File name of the new image (for 'blockdev-snapshot-sync') */
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001665 const char *new_image_file;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001666 ExternalSnapshotState *state =
1667 DO_UPCAST(ExternalSnapshotState, common, common);
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001668 TransactionAction *action = common->action;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001669
Alberto Garcia43de7e22015-10-26 14:27:16 +02001670 /* 'blockdev-snapshot' and 'blockdev-snapshot-sync' have similar
1671 * purpose but a different set of parameters */
1672 switch (action->type) {
1673 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT:
1674 {
Eric Blake32bafa82016-03-17 16:48:37 -06001675 BlockdevSnapshot *s = action->u.blockdev_snapshot.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001676 device = s->node;
1677 node_name = s->node;
1678 new_image_file = NULL;
1679 snapshot_ref = s->overlay;
1680 }
1681 break;
1682 case TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
1683 {
Eric Blake32bafa82016-03-17 16:48:37 -06001684 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001685 device = s->has_device ? s->device : NULL;
1686 node_name = s->has_node_name ? s->node_name : NULL;
1687 new_image_file = s->snapshot_file;
1688 snapshot_ref = NULL;
1689 }
1690 break;
1691 default:
1692 g_assert_not_reached();
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001693 }
1694
1695 /* start processing */
John Snow94d16a62015-11-05 18:13:18 -05001696 if (action_check_completion_mode(common, errp) < 0) {
1697 return;
1698 }
1699
Alberto Garcia43de7e22015-10-26 14:27:16 +02001700 state->old_bs = bdrv_lookup_bs(device, node_name, errp);
1701 if (!state->old_bs) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001702 return;
1703 }
1704
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001705 /* Acquire AioContext now so any threads operating on old_bs stop */
1706 state->aio_context = bdrv_get_aio_context(state->old_bs);
1707 aio_context_acquire(state->aio_context);
Fam Zhengda763e82015-10-23 11:08:10 +08001708 bdrv_drained_begin(state->old_bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001709
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001710 if (!bdrv_is_inserted(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001711 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001712 return;
1713 }
1714
Fam Zheng3718d8a2014-05-23 21:29:43 +08001715 if (bdrv_op_is_blocked(state->old_bs,
1716 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001717 return;
1718 }
1719
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001720 if (!bdrv_is_read_only(state->old_bs)) {
1721 if (bdrv_flush(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001722 error_setg(errp, QERR_IO_ERROR);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001723 return;
1724 }
1725 }
1726
Benoît Canet212a5a82014-01-23 21:31:36 +01001727 if (!bdrv_is_first_non_filter(state->old_bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01001728 error_setg(errp, QERR_FEATURE_DISABLED, "snapshot");
Benoît Canetf6186f42013-10-02 14:33:48 +02001729 return;
1730 }
1731
Alberto Garcia43de7e22015-10-26 14:27:16 +02001732 if (action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC) {
Eric Blake32bafa82016-03-17 16:48:37 -06001733 BlockdevSnapshotSync *s = action->u.blockdev_snapshot_sync.data;
Alberto Garcia43de7e22015-10-26 14:27:16 +02001734 const char *format = s->has_format ? s->format : "qcow2";
1735 enum NewImageMode mode;
1736 const char *snapshot_node_name =
1737 s->has_snapshot_node_name ? s->snapshot_node_name : NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001738
Alberto Garcia43de7e22015-10-26 14:27:16 +02001739 if (node_name && !snapshot_node_name) {
1740 error_setg(errp, "New snapshot node name missing");
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001741 return;
1742 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001743
1744 if (snapshot_node_name &&
1745 bdrv_lookup_bs(snapshot_node_name, snapshot_node_name, NULL)) {
1746 error_setg(errp, "New snapshot node name already in use");
1747 return;
1748 }
1749
1750 flags = state->old_bs->open_flags;
Kevin Wolf4c844982016-02-29 13:12:26 +01001751 flags &= ~(BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING | BDRV_O_COPY_ON_READ);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001752
1753 /* create new image w/backing file */
1754 mode = s->has_mode ? s->mode : NEW_IMAGE_MODE_ABSOLUTE_PATHS;
1755 if (mode != NEW_IMAGE_MODE_EXISTING) {
Kevin Wolff86b8b52016-03-02 12:16:44 +01001756 int64_t size = bdrv_getlength(state->old_bs);
1757 if (size < 0) {
1758 error_setg_errno(errp, -size, "bdrv_getlength failed");
1759 return;
1760 }
Alberto Garcia43de7e22015-10-26 14:27:16 +02001761 bdrv_img_create(new_image_file, format,
1762 state->old_bs->filename,
1763 state->old_bs->drv->format_name,
Kevin Wolff86b8b52016-03-02 12:16:44 +01001764 NULL, size, flags, &local_err, false);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001765 if (local_err) {
1766 error_propagate(errp, local_err);
1767 return;
1768 }
1769 }
1770
1771 options = qdict_new();
1772 if (s->has_snapshot_node_name) {
1773 qdict_put(options, "node-name",
1774 qstring_from_str(snapshot_node_name));
1775 }
1776 qdict_put(options, "driver", qstring_from_str(format));
1777
1778 flags |= BDRV_O_NO_BACKING;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001779 }
1780
Kevin Wolf73ac4512016-03-14 15:46:03 +01001781 /* There is no BB attached during bdrv_open(), so we can't set a
1782 * writethrough mode. bdrv_append() will swap the WCE setting so that the
1783 * backing file becomes unconditionally writeback (which is what backing
1784 * files should always be) and the new overlay gets the original setting. */
1785 flags |= BDRV_O_CACHE_WB;
1786
Max Reitzf67503e2014-02-18 18:33:05 +01001787 assert(state->new_bs == NULL);
Alberto Garcia43de7e22015-10-26 14:27:16 +02001788 ret = bdrv_open(&state->new_bs, new_image_file, snapshot_ref, options,
1789 flags, errp);
Max Reitzf67503e2014-02-18 18:33:05 +01001790 /* We will manually add the backing_hd field to the bs later */
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001791 if (ret != 0) {
Alberto Garcia43de7e22015-10-26 14:27:16 +02001792 return;
1793 }
1794
1795 if (state->new_bs->blk != NULL) {
1796 error_setg(errp, "The snapshot is already in use by %s",
1797 blk_name(state->new_bs->blk));
1798 return;
1799 }
1800
1801 if (bdrv_op_is_blocked(state->new_bs, BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT,
1802 errp)) {
1803 return;
1804 }
1805
1806 if (state->new_bs->backing != NULL) {
1807 error_setg(errp, "The snapshot already has a backing image");
Alberto Garcia08b24cf2015-11-03 12:32:35 +02001808 return;
1809 }
1810
1811 if (!state->new_bs->drv->supports_backing) {
1812 error_setg(errp, "The snapshot does not support backing images");
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001813 }
1814}
1815
John Snow50f43f02015-11-05 18:13:09 -05001816static void external_snapshot_commit(BlkActionState *common)
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001817{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001818 ExternalSnapshotState *state =
1819 DO_UPCAST(ExternalSnapshotState, common, common);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001820
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001821 bdrv_set_aio_context(state->new_bs, state->aio_context);
1822
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001823 /* This removes our old bs and adds the new bs */
1824 bdrv_append(state->new_bs, state->old_bs);
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001825 /* We don't need (or want) to use the transactional
1826 * bdrv_reopen_multiple() across all the entries at once, because we
1827 * don't want to abort all of them if one of them fails the reopen */
Kevin Wolf4c844982016-02-29 13:12:26 +01001828 if (!state->old_bs->copy_on_read) {
1829 bdrv_reopen(state->old_bs, state->old_bs->open_flags & ~BDRV_O_RDWR,
1830 NULL);
1831 }
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001832}
1833
John Snow50f43f02015-11-05 18:13:09 -05001834static void external_snapshot_abort(BlkActionState *common)
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001835{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001836 ExternalSnapshotState *state =
1837 DO_UPCAST(ExternalSnapshotState, common, common);
1838 if (state->new_bs) {
Fam Zheng4f6fd342013-08-23 09:14:47 +08001839 bdrv_unref(state->new_bs);
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001840 }
Fam Zhengda763e82015-10-23 11:08:10 +08001841}
1842
John Snow50f43f02015-11-05 18:13:09 -05001843static void external_snapshot_clean(BlkActionState *common)
Fam Zhengda763e82015-10-23 11:08:10 +08001844{
1845 ExternalSnapshotState *state =
1846 DO_UPCAST(ExternalSnapshotState, common, common);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001847 if (state->aio_context) {
Fam Zhengda763e82015-10-23 11:08:10 +08001848 bdrv_drained_end(state->old_bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001849 aio_context_release(state->aio_context);
1850 }
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001851}
1852
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001853typedef struct DriveBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001854 BlkActionState common;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001855 BlockDriverState *bs;
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001856 AioContext *aio_context;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001857 BlockJob *job;
1858} DriveBackupState;
1859
John Snow78f51fd2015-11-05 18:13:17 -05001860static void do_drive_backup(const char *device, const char *target,
1861 bool has_format, const char *format,
1862 enum MirrorSyncMode sync,
1863 bool has_mode, enum NewImageMode mode,
1864 bool has_speed, int64_t speed,
1865 bool has_bitmap, const char *bitmap,
1866 bool has_on_source_error,
1867 BlockdevOnError on_source_error,
1868 bool has_on_target_error,
1869 BlockdevOnError on_target_error,
1870 BlockJobTxn *txn, Error **errp);
1871
John Snow50f43f02015-11-05 18:13:09 -05001872static void drive_backup_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001873{
1874 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
Fam Zhenga0e85442015-03-02 19:36:48 +08001875 BlockBackend *blk;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001876 DriveBackup *backup;
1877 Error *local_err = NULL;
1878
Eric Blake6a8f9662015-10-26 16:34:54 -06001879 assert(common->action->type == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001880 backup = common->action->u.drive_backup.data;
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001881
Fam Zhenga0e85442015-03-02 19:36:48 +08001882 blk = blk_by_name(backup->device);
1883 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01001884 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
1885 "Device '%s' not found", backup->device);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001886 return;
1887 }
1888
Fam Zheng1fdd4b72015-10-23 11:08:11 +08001889 if (!blk_is_available(blk)) {
1890 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1891 return;
1892 }
1893
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001894 /* AioContext is released in .clean() */
Max Reitz5433c242015-10-19 17:53:29 +02001895 state->aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001896 aio_context_acquire(state->aio_context);
Fam Zheng1fdd4b72015-10-23 11:08:11 +08001897 bdrv_drained_begin(blk_bs(blk));
1898 state->bs = blk_bs(blk);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001899
John Snow78f51fd2015-11-05 18:13:17 -05001900 do_drive_backup(backup->device, backup->target,
1901 backup->has_format, backup->format,
1902 backup->sync,
1903 backup->has_mode, backup->mode,
1904 backup->has_speed, backup->speed,
1905 backup->has_bitmap, backup->bitmap,
1906 backup->has_on_source_error, backup->on_source_error,
1907 backup->has_on_target_error, backup->on_target_error,
John Snow94d16a62015-11-05 18:13:18 -05001908 common->block_job_txn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001909 if (local_err) {
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001910 error_propagate(errp, local_err);
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001911 return;
1912 }
1913
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001914 state->job = state->bs->job;
1915}
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);
1920 BlockDriverState *bs = state->bs;
1921
1922 /* Only cancel if it's the job we started */
1923 if (bs && bs->job && bs->job == state->job) {
1924 block_job_cancel_sync(bs->job);
1925 }
1926}
1927
John Snow50f43f02015-11-05 18:13:09 -05001928static void drive_backup_clean(BlkActionState *common)
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001929{
1930 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1931
1932 if (state->aio_context) {
Fam Zheng1fdd4b72015-10-23 11:08:11 +08001933 bdrv_drained_end(state->bs);
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00001934 aio_context_release(state->aio_context);
1935 }
1936}
1937
Fam Zhengbd8baec2014-12-18 18:37:06 +08001938typedef struct BlockdevBackupState {
John Snow50f43f02015-11-05 18:13:09 -05001939 BlkActionState common;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001940 BlockDriverState *bs;
1941 BlockJob *job;
1942 AioContext *aio_context;
1943} BlockdevBackupState;
1944
John Snow78f51fd2015-11-05 18:13:17 -05001945static void do_blockdev_backup(const char *device, const char *target,
1946 enum MirrorSyncMode sync,
1947 bool has_speed, int64_t speed,
1948 bool has_on_source_error,
1949 BlockdevOnError on_source_error,
1950 bool has_on_target_error,
1951 BlockdevOnError on_target_error,
1952 BlockJobTxn *txn, Error **errp);
1953
John Snow50f43f02015-11-05 18:13:09 -05001954static void blockdev_backup_prepare(BlkActionState *common, Error **errp)
Fam Zhengbd8baec2014-12-18 18:37:06 +08001955{
1956 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
1957 BlockdevBackup *backup;
Max Reitz5433c242015-10-19 17:53:29 +02001958 BlockBackend *blk, *target;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001959 Error *local_err = NULL;
1960
Eric Blake6a8f9662015-10-26 16:34:54 -06001961 assert(common->action->type == TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP);
Eric Blake32bafa82016-03-17 16:48:37 -06001962 backup = common->action->u.blockdev_backup.data;
Fam Zhengbd8baec2014-12-18 18:37:06 +08001963
Fam Zhenga0e85442015-03-02 19:36:48 +08001964 blk = blk_by_name(backup->device);
1965 if (!blk) {
Markus Armbruster5b347c52015-03-17 08:36:14 +01001966 error_setg(errp, "Device '%s' not found", backup->device);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001967 return;
1968 }
1969
Fam Zhengff52bf32015-10-23 11:08:12 +08001970 if (!blk_is_available(blk)) {
1971 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, backup->device);
1972 return;
1973 }
1974
Max Reitz5433c242015-10-19 17:53:29 +02001975 target = blk_by_name(backup->target);
1976 if (!target) {
Markus Armbruster5b347c52015-03-17 08:36:14 +01001977 error_setg(errp, "Device '%s' not found", backup->target);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001978 return;
1979 }
1980
1981 /* AioContext is released in .clean() */
Max Reitz5433c242015-10-19 17:53:29 +02001982 state->aio_context = blk_get_aio_context(blk);
1983 if (state->aio_context != blk_get_aio_context(target)) {
Fam Zhengbd8baec2014-12-18 18:37:06 +08001984 state->aio_context = NULL;
1985 error_setg(errp, "Backup between two IO threads is not implemented");
1986 return;
1987 }
1988 aio_context_acquire(state->aio_context);
Fam Zhengff52bf32015-10-23 11:08:12 +08001989 state->bs = blk_bs(blk);
1990 bdrv_drained_begin(state->bs);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001991
John Snow78f51fd2015-11-05 18:13:17 -05001992 do_blockdev_backup(backup->device, backup->target,
1993 backup->sync,
1994 backup->has_speed, backup->speed,
1995 backup->has_on_source_error, backup->on_source_error,
1996 backup->has_on_target_error, backup->on_target_error,
John Snow94d16a62015-11-05 18:13:18 -05001997 common->block_job_txn, &local_err);
Fam Zhengbd8baec2014-12-18 18:37:06 +08001998 if (local_err) {
1999 error_propagate(errp, local_err);
2000 return;
2001 }
2002
Fam Zhengbd8baec2014-12-18 18:37:06 +08002003 state->job = state->bs->job;
2004}
2005
John Snow50f43f02015-11-05 18:13:09 -05002006static void blockdev_backup_abort(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08002007{
2008 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
2009 BlockDriverState *bs = state->bs;
2010
2011 /* Only cancel if it's the job we started */
2012 if (bs && bs->job && bs->job == state->job) {
2013 block_job_cancel_sync(bs->job);
2014 }
2015}
2016
John Snow50f43f02015-11-05 18:13:09 -05002017static void blockdev_backup_clean(BlkActionState *common)
Fam Zhengbd8baec2014-12-18 18:37:06 +08002018{
2019 BlockdevBackupState *state = DO_UPCAST(BlockdevBackupState, common, common);
2020
2021 if (state->aio_context) {
Fam Zhengff52bf32015-10-23 11:08:12 +08002022 bdrv_drained_end(state->bs);
Fam Zhengbd8baec2014-12-18 18:37:06 +08002023 aio_context_release(state->aio_context);
2024 }
2025}
2026
Fam Zhengdf9a6812015-11-09 18:16:54 +08002027typedef struct BlockDirtyBitmapState {
John Snow50f43f02015-11-05 18:13:09 -05002028 BlkActionState common;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002029 BdrvDirtyBitmap *bitmap;
2030 BlockDriverState *bs;
2031 AioContext *aio_context;
2032 HBitmap *backup;
2033 bool prepared;
2034} BlockDirtyBitmapState;
2035
John Snow50f43f02015-11-05 18:13:09 -05002036static void block_dirty_bitmap_add_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002037 Error **errp)
2038{
2039 Error *local_err = NULL;
2040 BlockDirtyBitmapAdd *action;
2041 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2042 common, common);
2043
John Snow94d16a62015-11-05 18:13:18 -05002044 if (action_check_completion_mode(common, errp) < 0) {
2045 return;
2046 }
2047
Eric Blake32bafa82016-03-17 16:48:37 -06002048 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002049 /* AIO context taken and released within qmp_block_dirty_bitmap_add */
2050 qmp_block_dirty_bitmap_add(action->node, action->name,
2051 action->has_granularity, action->granularity,
2052 &local_err);
2053
2054 if (!local_err) {
2055 state->prepared = true;
2056 } else {
2057 error_propagate(errp, local_err);
2058 }
2059}
2060
John Snow50f43f02015-11-05 18:13:09 -05002061static void block_dirty_bitmap_add_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002062{
2063 BlockDirtyBitmapAdd *action;
2064 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2065 common, common);
2066
Eric Blake32bafa82016-03-17 16:48:37 -06002067 action = common->action->u.block_dirty_bitmap_add.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002068 /* Should not be able to fail: IF the bitmap was added via .prepare(),
2069 * then the node reference and bitmap name must have been valid.
2070 */
2071 if (state->prepared) {
2072 qmp_block_dirty_bitmap_remove(action->node, action->name, &error_abort);
2073 }
2074}
2075
John Snow50f43f02015-11-05 18:13:09 -05002076static void block_dirty_bitmap_clear_prepare(BlkActionState *common,
Fam Zhengdf9a6812015-11-09 18:16:54 +08002077 Error **errp)
2078{
2079 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2080 common, common);
2081 BlockDirtyBitmap *action;
2082
John Snow94d16a62015-11-05 18:13:18 -05002083 if (action_check_completion_mode(common, errp) < 0) {
2084 return;
2085 }
2086
Eric Blake32bafa82016-03-17 16:48:37 -06002087 action = common->action->u.block_dirty_bitmap_clear.data;
Fam Zhengdf9a6812015-11-09 18:16:54 +08002088 state->bitmap = block_dirty_bitmap_lookup(action->node,
2089 action->name,
2090 &state->bs,
2091 &state->aio_context,
2092 errp);
2093 if (!state->bitmap) {
2094 return;
2095 }
2096
2097 if (bdrv_dirty_bitmap_frozen(state->bitmap)) {
2098 error_setg(errp, "Cannot modify a frozen bitmap");
2099 return;
2100 } else if (!bdrv_dirty_bitmap_enabled(state->bitmap)) {
2101 error_setg(errp, "Cannot clear a disabled bitmap");
2102 return;
2103 }
2104
2105 bdrv_clear_dirty_bitmap(state->bitmap, &state->backup);
2106 /* AioContext is released in .clean() */
2107}
2108
John Snow50f43f02015-11-05 18:13:09 -05002109static void block_dirty_bitmap_clear_abort(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002110{
2111 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2112 common, common);
2113
2114 bdrv_undo_clear_dirty_bitmap(state->bitmap, state->backup);
2115}
2116
John Snow50f43f02015-11-05 18:13:09 -05002117static void block_dirty_bitmap_clear_commit(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002118{
2119 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2120 common, common);
2121
2122 hbitmap_free(state->backup);
2123}
2124
John Snow50f43f02015-11-05 18:13:09 -05002125static void block_dirty_bitmap_clear_clean(BlkActionState *common)
Fam Zhengdf9a6812015-11-09 18:16:54 +08002126{
2127 BlockDirtyBitmapState *state = DO_UPCAST(BlockDirtyBitmapState,
2128 common, common);
2129
2130 if (state->aio_context) {
2131 aio_context_release(state->aio_context);
2132 }
2133}
2134
John Snow50f43f02015-11-05 18:13:09 -05002135static void abort_prepare(BlkActionState *common, Error **errp)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002136{
2137 error_setg(errp, "Transaction aborted using Abort action");
2138}
2139
John Snow50f43f02015-11-05 18:13:09 -05002140static void abort_commit(BlkActionState *common)
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002141{
Stefan Weildfc6f862013-07-25 18:21:28 +02002142 g_assert_not_reached(); /* this action never succeeds */
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002143}
2144
John Snow50f43f02015-11-05 18:13:09 -05002145static const BlkActionOps actions[] = {
Alberto Garcia43de7e22015-10-26 14:27:16 +02002146 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT] = {
2147 .instance_size = sizeof(ExternalSnapshotState),
2148 .prepare = external_snapshot_prepare,
2149 .commit = external_snapshot_commit,
2150 .abort = external_snapshot_abort,
Alberto Garcia4ad6f3d2015-11-13 15:00:24 +02002151 .clean = external_snapshot_clean,
Alberto Garcia43de7e22015-10-26 14:27:16 +02002152 },
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002153 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002154 .instance_size = sizeof(ExternalSnapshotState),
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002155 .prepare = external_snapshot_prepare,
2156 .commit = external_snapshot_commit,
2157 .abort = external_snapshot_abort,
Fam Zhengda763e82015-10-23 11:08:10 +08002158 .clean = external_snapshot_clean,
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002159 },
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002160 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
2161 .instance_size = sizeof(DriveBackupState),
2162 .prepare = drive_backup_prepare,
2163 .abort = drive_backup_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002164 .clean = drive_backup_clean,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02002165 },
Fam Zhengbd8baec2014-12-18 18:37:06 +08002166 [TRANSACTION_ACTION_KIND_BLOCKDEV_BACKUP] = {
2167 .instance_size = sizeof(BlockdevBackupState),
2168 .prepare = blockdev_backup_prepare,
2169 .abort = blockdev_backup_abort,
2170 .clean = blockdev_backup_clean,
2171 },
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002172 [TRANSACTION_ACTION_KIND_ABORT] = {
John Snow50f43f02015-11-05 18:13:09 -05002173 .instance_size = sizeof(BlkActionState),
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02002174 .prepare = abort_prepare,
2175 .commit = abort_commit,
2176 },
Wenchao Xiabbe86012013-09-11 14:04:34 +08002177 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
2178 .instance_size = sizeof(InternalSnapshotState),
2179 .prepare = internal_snapshot_prepare,
2180 .abort = internal_snapshot_abort,
Stefan Hajnoczi5d6e96e2014-11-21 10:48:59 +00002181 .clean = internal_snapshot_clean,
Wenchao Xiabbe86012013-09-11 14:04:34 +08002182 },
Fam Zhengdf9a6812015-11-09 18:16:54 +08002183 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_ADD] = {
2184 .instance_size = sizeof(BlockDirtyBitmapState),
2185 .prepare = block_dirty_bitmap_add_prepare,
2186 .abort = block_dirty_bitmap_add_abort,
2187 },
2188 [TRANSACTION_ACTION_KIND_BLOCK_DIRTY_BITMAP_CLEAR] = {
2189 .instance_size = sizeof(BlockDirtyBitmapState),
2190 .prepare = block_dirty_bitmap_clear_prepare,
2191 .commit = block_dirty_bitmap_clear_commit,
2192 .abort = block_dirty_bitmap_clear_abort,
2193 .clean = block_dirty_bitmap_clear_clean,
2194 }
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002195};
2196
John Snow94d16a62015-11-05 18:13:18 -05002197/**
2198 * Allocate a TransactionProperties structure if necessary, and fill
2199 * that structure with desired defaults if they are unset.
2200 */
2201static TransactionProperties *get_transaction_properties(
2202 TransactionProperties *props)
2203{
2204 if (!props) {
2205 props = g_new0(TransactionProperties, 1);
2206 }
2207
2208 if (!props->has_completion_mode) {
2209 props->has_completion_mode = true;
2210 props->completion_mode = ACTION_COMPLETION_MODE_INDIVIDUAL;
2211 }
2212
2213 return props;
2214}
2215
Jeff Cody8802d1f2012-02-28 15:54:06 -05002216/*
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002217 * 'Atomic' group operations. The operations are performed as a set, and if
2218 * any fail then we roll back all operations in the group.
Jeff Cody8802d1f2012-02-28 15:54:06 -05002219 */
John Snow94d16a62015-11-05 18:13:18 -05002220void qmp_transaction(TransactionActionList *dev_list,
2221 bool has_props,
2222 struct TransactionProperties *props,
2223 Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -05002224{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002225 TransactionActionList *dev_entry = dev_list;
John Snow94d16a62015-11-05 18:13:18 -05002226 BlockJobTxn *block_job_txn = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002227 BlkActionState *state, *next;
Luiz Capitulino43e17042012-11-30 10:52:07 -02002228 Error *local_err = NULL;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002229
John Snow50f43f02015-11-05 18:13:09 -05002230 QSIMPLEQ_HEAD(snap_bdrv_states, BlkActionState) snap_bdrv_states;
Jeff Cody8802d1f2012-02-28 15:54:06 -05002231 QSIMPLEQ_INIT(&snap_bdrv_states);
2232
John Snow94d16a62015-11-05 18:13:18 -05002233 /* Does this transaction get canceled as a group on failure?
2234 * If not, we don't really need to make a BlockJobTxn.
2235 */
2236 props = get_transaction_properties(props);
2237 if (props->completion_mode != ACTION_COMPLETION_MODE_INDIVIDUAL) {
2238 block_job_txn = block_job_txn_new();
2239 }
2240
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002241 /* drain all i/o before any operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002242 bdrv_drain_all();
2243
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002244 /* We don't do anything in this loop that commits us to the operations */
Jeff Cody8802d1f2012-02-28 15:54:06 -05002245 while (NULL != dev_entry) {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02002246 TransactionAction *dev_info = NULL;
John Snow50f43f02015-11-05 18:13:09 -05002247 const BlkActionOps *ops;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002248
Jeff Cody8802d1f2012-02-28 15:54:06 -05002249 dev_info = dev_entry->value;
2250 dev_entry = dev_entry->next;
2251
Eric Blake6a8f9662015-10-26 16:34:54 -06002252 assert(dev_info->type < ARRAY_SIZE(actions));
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002253
Eric Blake6a8f9662015-10-26 16:34:54 -06002254 ops = &actions[dev_info->type];
Max Reitzaa3fe712013-09-12 14:57:27 +02002255 assert(ops->instance_size > 0);
2256
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002257 state = g_malloc0(ops->instance_size);
2258 state->ops = ops;
2259 state->action = dev_info;
John Snow94d16a62015-11-05 18:13:18 -05002260 state->block_job_txn = block_job_txn;
2261 state->txn_props = props;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002262 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002263
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002264 state->ops->prepare(state, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002265 if (local_err) {
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002266 error_propagate(errp, local_err);
2267 goto delete_and_fail;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01002268 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002269 }
2270
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002271 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02002272 if (state->ops->commit) {
2273 state->ops->commit(state);
2274 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002275 }
2276
2277 /* success */
2278 goto exit;
2279
2280delete_and_fail:
Stefan Hajnoczib756b9c2014-11-21 10:48:57 +00002281 /* failure, and it is all-or-none; roll back all operations */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002282 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
2283 if (state->ops->abort) {
2284 state->ops->abort(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002285 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05002286 }
2287exit:
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002288 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
2289 if (state->ops->clean) {
2290 state->ops->clean(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08002291 }
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02002292 g_free(state);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002293 }
John Snow94d16a62015-11-05 18:13:18 -05002294 if (!has_props) {
2295 qapi_free_TransactionProperties(props);
2296 }
2297 block_job_txn_unref(block_job_txn);
Jeff Cody8802d1f2012-02-28 15:54:06 -05002298}
2299
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02002300void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002301{
Max Reitz38f54bd2015-10-26 21:39:12 +01002302 Error *local_err = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +02002303
Max Reitz38f54bd2015-10-26 21:39:12 +01002304 qmp_blockdev_open_tray(device, has_force, force, &local_err);
2305 if (local_err) {
2306 error_propagate(errp, local_err);
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02002307 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002308 }
Luiz Capitulino92d48552011-12-07 15:47:23 -02002309
Max Reitz6e0abc22015-12-11 16:23:05 +01002310 qmp_x_blockdev_remove_medium(device, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02002311}
2312
Benoît Canet12d3ba82014-01-23 21:31:35 +01002313void qmp_block_passwd(bool has_device, const char *device,
2314 bool has_node_name, const char *node_name,
2315 const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02002316{
Benoît Canet12d3ba82014-01-23 21:31:35 +01002317 Error *local_err = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +02002318 BlockDriverState *bs;
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002319 AioContext *aio_context;
Markus Armbruster666daa62010-06-02 18:48:27 +02002320
Benoît Canet12d3ba82014-01-23 21:31:35 +01002321 bs = bdrv_lookup_bs(has_device ? device : NULL,
2322 has_node_name ? node_name : NULL,
2323 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002324 if (local_err) {
Benoît Canet12d3ba82014-01-23 21:31:35 +01002325 error_propagate(errp, local_err);
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -02002326 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02002327 }
2328
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002329 aio_context = bdrv_get_aio_context(bs);
2330 aio_context_acquire(aio_context);
2331
Markus Armbruster4d2855a2015-01-29 10:37:00 +01002332 bdrv_add_key(bs, password, errp);
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002333
Stefan Hajnoczie3442092014-11-19 14:19:44 +00002334 aio_context_release(aio_context);
Markus Armbruster666daa62010-06-02 18:48:27 +02002335}
2336
Max Reitz7d8a9f72015-10-26 21:39:08 +01002337void qmp_blockdev_open_tray(const char *device, bool has_force, bool force,
2338 Error **errp)
2339{
2340 BlockBackend *blk;
2341 bool locked;
2342
2343 if (!has_force) {
2344 force = false;
2345 }
2346
2347 blk = blk_by_name(device);
2348 if (!blk) {
2349 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2350 "Device '%s' not found", device);
2351 return;
2352 }
2353
2354 if (!blk_dev_has_removable_media(blk)) {
2355 error_setg(errp, "Device '%s' is not removable", device);
2356 return;
2357 }
2358
Max Reitz12c7ec82016-01-29 20:49:11 +01002359 if (!blk_dev_has_tray(blk)) {
2360 /* Ignore this command on tray-less devices */
2361 return;
2362 }
2363
Max Reitz7d8a9f72015-10-26 21:39:08 +01002364 if (blk_dev_is_tray_open(blk)) {
2365 return;
2366 }
2367
2368 locked = blk_dev_is_medium_locked(blk);
2369 if (locked) {
2370 blk_dev_eject_request(blk, force);
2371 }
2372
2373 if (!locked || force) {
2374 blk_dev_change_media_cb(blk, false);
2375 }
2376}
2377
Max Reitzabaaf592015-10-26 21:39:09 +01002378void qmp_blockdev_close_tray(const char *device, Error **errp)
2379{
2380 BlockBackend *blk;
2381
2382 blk = blk_by_name(device);
2383 if (!blk) {
2384 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2385 "Device '%s' not found", device);
2386 return;
2387 }
2388
2389 if (!blk_dev_has_removable_media(blk)) {
2390 error_setg(errp, "Device '%s' is not removable", device);
2391 return;
2392 }
2393
Max Reitz12c7ec82016-01-29 20:49:11 +01002394 if (!blk_dev_has_tray(blk)) {
2395 /* Ignore this command on tray-less devices */
2396 return;
2397 }
2398
Max Reitzabaaf592015-10-26 21:39:09 +01002399 if (!blk_dev_is_tray_open(blk)) {
2400 return;
2401 }
2402
2403 blk_dev_change_media_cb(blk, true);
2404}
2405
Max Reitz6e0abc22015-12-11 16:23:05 +01002406void qmp_x_blockdev_remove_medium(const char *device, Error **errp)
Max Reitz2814f672015-10-26 21:39:10 +01002407{
2408 BlockBackend *blk;
2409 BlockDriverState *bs;
2410 AioContext *aio_context;
2411 bool has_device;
2412
2413 blk = blk_by_name(device);
2414 if (!blk) {
2415 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2416 "Device '%s' not found", device);
2417 return;
2418 }
2419
2420 /* For BBs without a device, we can exchange the BDS tree at will */
2421 has_device = blk_get_attached_dev(blk);
2422
2423 if (has_device && !blk_dev_has_removable_media(blk)) {
2424 error_setg(errp, "Device '%s' is not removable", device);
2425 return;
2426 }
2427
Max Reitz12c7ec82016-01-29 20:49:11 +01002428 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
Max Reitz2814f672015-10-26 21:39:10 +01002429 error_setg(errp, "Tray of device '%s' is not open", device);
2430 return;
2431 }
2432
2433 bs = blk_bs(blk);
2434 if (!bs) {
2435 return;
2436 }
2437
2438 aio_context = bdrv_get_aio_context(bs);
2439 aio_context_acquire(aio_context);
2440
2441 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
2442 goto out;
2443 }
2444
Max Reitz2814f672015-10-26 21:39:10 +01002445 blk_remove_bs(blk);
2446
Max Reitz12c7ec82016-01-29 20:49:11 +01002447 if (!blk_dev_has_tray(blk)) {
2448 /* For tray-less devices, blockdev-open-tray is a no-op (or may not be
2449 * called at all); therefore, the medium needs to be ejected here.
2450 * Do it after blk_remove_bs() so blk_is_inserted(blk) returns the @load
2451 * value passed here (i.e. false). */
2452 blk_dev_change_media_cb(blk, false);
2453 }
2454
Max Reitz2814f672015-10-26 21:39:10 +01002455out:
2456 aio_context_release(aio_context);
2457}
2458
Max Reitzd1299882015-10-26 21:39:11 +01002459static void qmp_blockdev_insert_anon_medium(const char *device,
2460 BlockDriverState *bs, Error **errp)
2461{
2462 BlockBackend *blk;
2463 bool has_device;
2464
2465 blk = blk_by_name(device);
2466 if (!blk) {
2467 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2468 "Device '%s' not found", device);
2469 return;
2470 }
2471
2472 /* For BBs without a device, we can exchange the BDS tree at will */
2473 has_device = blk_get_attached_dev(blk);
2474
2475 if (has_device && !blk_dev_has_removable_media(blk)) {
2476 error_setg(errp, "Device '%s' is not removable", device);
2477 return;
2478 }
2479
Max Reitz12c7ec82016-01-29 20:49:11 +01002480 if (has_device && blk_dev_has_tray(blk) && !blk_dev_is_tray_open(blk)) {
Max Reitzd1299882015-10-26 21:39:11 +01002481 error_setg(errp, "Tray of device '%s' is not open", device);
2482 return;
2483 }
2484
2485 if (blk_bs(blk)) {
2486 error_setg(errp, "There already is a medium in device '%s'", device);
2487 return;
2488 }
2489
2490 blk_insert_bs(blk, bs);
2491
Max Reitz12c7ec82016-01-29 20:49:11 +01002492 if (!blk_dev_has_tray(blk)) {
2493 /* For tray-less devices, blockdev-close-tray is a no-op (or may not be
2494 * called at all); therefore, the medium needs to be pushed into the
2495 * slot here.
2496 * Do it after blk_insert_bs() so blk_is_inserted(blk) returns the @load
2497 * value passed here (i.e. true). */
2498 blk_dev_change_media_cb(blk, true);
2499 }
Max Reitzd1299882015-10-26 21:39:11 +01002500}
2501
Max Reitz6e0abc22015-12-11 16:23:05 +01002502void qmp_x_blockdev_insert_medium(const char *device, const char *node_name,
2503 Error **errp)
Max Reitzd1299882015-10-26 21:39:11 +01002504{
2505 BlockDriverState *bs;
2506
2507 bs = bdrv_find_node(node_name);
2508 if (!bs) {
2509 error_setg(errp, "Node '%s' not found", node_name);
2510 return;
2511 }
2512
2513 if (bs->blk) {
2514 error_setg(errp, "Node '%s' is already in use by '%s'", node_name,
2515 blk_name(bs->blk));
2516 return;
2517 }
2518
2519 qmp_blockdev_insert_anon_medium(device, bs, errp);
2520}
2521
Max Reitz24fb4132015-11-06 16:27:06 +01002522void qmp_blockdev_change_medium(const char *device, const char *filename,
2523 bool has_format, const char *format,
Max Reitz39ff43d2015-11-11 04:49:44 +01002524 bool has_read_only,
2525 BlockdevChangeReadOnlyMode read_only,
Max Reitz24fb4132015-11-06 16:27:06 +01002526 Error **errp)
Max Reitzde2c6c02015-10-26 21:39:13 +01002527{
2528 BlockBackend *blk;
2529 BlockDriverState *medium_bs = NULL;
2530 int bdrv_flags, ret;
Kevin Wolf73ac4512016-03-14 15:46:03 +01002531 bool writethrough;
Max Reitzde2c6c02015-10-26 21:39:13 +01002532 QDict *options = NULL;
2533 Error *err = NULL;
2534
2535 blk = blk_by_name(device);
2536 if (!blk) {
2537 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2538 "Device '%s' not found", device);
2539 goto fail;
2540 }
2541
2542 if (blk_bs(blk)) {
2543 blk_update_root_state(blk);
2544 }
2545
2546 bdrv_flags = blk_get_open_flags_from_root_state(blk);
Alyssa Milburn156abc22016-02-06 13:36:18 +00002547 bdrv_flags &= ~(BDRV_O_TEMPORARY | BDRV_O_SNAPSHOT | BDRV_O_NO_BACKING |
2548 BDRV_O_PROTOCOL);
Max Reitzde2c6c02015-10-26 21:39:13 +01002549
Kevin Wolf73ac4512016-03-14 15:46:03 +01002550 /* Must open the image in writeback mode as long as no BlockBackend is
2551 * attached. The right mode can be set as the final step after changing the
2552 * medium. */
2553 writethrough = !(bdrv_flags & BDRV_O_CACHE_WB);
2554 bdrv_flags |= BDRV_O_CACHE_WB;
2555
Max Reitz39ff43d2015-11-11 04:49:44 +01002556 if (!has_read_only) {
2557 read_only = BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN;
2558 }
2559
2560 switch (read_only) {
2561 case BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN:
2562 break;
2563
2564 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_ONLY:
2565 bdrv_flags &= ~BDRV_O_RDWR;
2566 break;
2567
2568 case BLOCKDEV_CHANGE_READ_ONLY_MODE_READ_WRITE:
2569 bdrv_flags |= BDRV_O_RDWR;
2570 break;
2571
2572 default:
2573 abort();
2574 }
2575
Max Reitz24fb4132015-11-06 16:27:06 +01002576 if (has_format) {
Max Reitzde2c6c02015-10-26 21:39:13 +01002577 options = qdict_new();
2578 qdict_put(options, "driver", qstring_from_str(format));
2579 }
2580
2581 assert(!medium_bs);
2582 ret = bdrv_open(&medium_bs, filename, NULL, options, bdrv_flags, errp);
2583 if (ret < 0) {
2584 goto fail;
2585 }
2586
2587 blk_apply_root_state(blk, medium_bs);
2588
2589 bdrv_add_key(medium_bs, NULL, &err);
2590 if (err) {
2591 error_propagate(errp, err);
2592 goto fail;
2593 }
2594
2595 qmp_blockdev_open_tray(device, false, false, &err);
2596 if (err) {
2597 error_propagate(errp, err);
2598 goto fail;
2599 }
2600
Max Reitz6e0abc22015-12-11 16:23:05 +01002601 qmp_x_blockdev_remove_medium(device, &err);
Max Reitzde2c6c02015-10-26 21:39:13 +01002602 if (err) {
2603 error_propagate(errp, err);
2604 goto fail;
2605 }
2606
2607 qmp_blockdev_insert_anon_medium(device, medium_bs, &err);
2608 if (err) {
2609 error_propagate(errp, err);
2610 goto fail;
2611 }
2612
Kevin Wolf73ac4512016-03-14 15:46:03 +01002613 bdrv_set_enable_write_cache(medium_bs, !writethrough);
2614
Max Reitzde2c6c02015-10-26 21:39:13 +01002615 qmp_blockdev_close_tray(device, errp);
2616
2617fail:
2618 /* If the medium has been inserted, the device has its own reference, so
2619 * ours must be relinquished; and if it has not been inserted successfully,
2620 * the reference must be relinquished anyway */
2621 bdrv_unref(medium_bs);
2622}
2623
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002624/* throttling disk I/O limits */
Luiz Capitulino80047da2011-12-14 16:49:14 -02002625void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
Benoît Canet3e9fab62013-09-02 14:14:40 +02002626 int64_t bps_wr,
2627 int64_t iops,
2628 int64_t iops_rd,
2629 int64_t iops_wr,
2630 bool has_bps_max,
2631 int64_t bps_max,
2632 bool has_bps_rd_max,
2633 int64_t bps_rd_max,
2634 bool has_bps_wr_max,
2635 int64_t bps_wr_max,
2636 bool has_iops_max,
2637 int64_t iops_max,
2638 bool has_iops_rd_max,
2639 int64_t iops_rd_max,
2640 bool has_iops_wr_max,
Benoît Canet2024c1d2013-09-02 14:14:41 +02002641 int64_t iops_wr_max,
Alberto Garciadce13202016-02-18 12:27:03 +02002642 bool has_bps_max_length,
2643 int64_t bps_max_length,
2644 bool has_bps_rd_max_length,
2645 int64_t bps_rd_max_length,
2646 bool has_bps_wr_max_length,
2647 int64_t bps_wr_max_length,
2648 bool has_iops_max_length,
2649 int64_t iops_max_length,
2650 bool has_iops_rd_max_length,
2651 int64_t iops_rd_max_length,
2652 bool has_iops_wr_max_length,
2653 int64_t iops_wr_max_length,
Benoît Canet2024c1d2013-09-02 14:14:41 +02002654 bool has_iops_size,
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002655 int64_t iops_size,
2656 bool has_group,
2657 const char *group, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002658{
Benoît Canetcc0681c2013-09-02 14:14:39 +02002659 ThrottleConfig cfg;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002660 BlockDriverState *bs;
Fam Zhenga0e85442015-03-02 19:36:48 +08002661 BlockBackend *blk;
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002662 AioContext *aio_context;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002663
Fam Zhenga0e85442015-03-02 19:36:48 +08002664 blk = blk_by_name(device);
2665 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01002666 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
2667 "Device '%s' not found", device);
Luiz Capitulino80047da2011-12-14 16:49:14 -02002668 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002669 }
Max Reitz5433c242015-10-19 17:53:29 +02002670
2671 aio_context = blk_get_aio_context(blk);
2672 aio_context_acquire(aio_context);
2673
Fam Zhenga0e85442015-03-02 19:36:48 +08002674 bs = blk_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002675 if (!bs) {
2676 error_setg(errp, "Device '%s' has no medium", device);
2677 goto out;
2678 }
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002679
Alberto Garcia1588ab52016-02-18 12:27:00 +02002680 throttle_config_init(&cfg);
Benoît Canetcc0681c2013-09-02 14:14:39 +02002681 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
2682 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
2683 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002684
Benoît Canetcc0681c2013-09-02 14:14:39 +02002685 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
2686 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
2687 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
2688
Benoît Canet3e9fab62013-09-02 14:14:40 +02002689 if (has_bps_max) {
2690 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
2691 }
2692 if (has_bps_rd_max) {
2693 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
2694 }
2695 if (has_bps_wr_max) {
2696 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
2697 }
2698 if (has_iops_max) {
2699 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
2700 }
2701 if (has_iops_rd_max) {
2702 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
2703 }
2704 if (has_iops_wr_max) {
2705 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
2706 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002707
Alberto Garciadce13202016-02-18 12:27:03 +02002708 if (has_bps_max_length) {
2709 cfg.buckets[THROTTLE_BPS_TOTAL].burst_length = bps_max_length;
2710 }
2711 if (has_bps_rd_max_length) {
2712 cfg.buckets[THROTTLE_BPS_READ].burst_length = bps_rd_max_length;
2713 }
2714 if (has_bps_wr_max_length) {
2715 cfg.buckets[THROTTLE_BPS_WRITE].burst_length = bps_wr_max_length;
2716 }
2717 if (has_iops_max_length) {
2718 cfg.buckets[THROTTLE_OPS_TOTAL].burst_length = iops_max_length;
2719 }
2720 if (has_iops_rd_max_length) {
2721 cfg.buckets[THROTTLE_OPS_READ].burst_length = iops_rd_max_length;
2722 }
2723 if (has_iops_wr_max_length) {
2724 cfg.buckets[THROTTLE_OPS_WRITE].burst_length = iops_wr_max_length;
2725 }
2726
Benoît Canet2024c1d2013-09-02 14:14:41 +02002727 if (has_iops_size) {
2728 cfg.op_size = iops_size;
2729 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02002730
Alberto Garciad5851082016-02-18 12:26:59 +02002731 if (!throttle_is_valid(&cfg, errp)) {
Max Reitz5433c242015-10-19 17:53:29 +02002732 goto out;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002733 }
2734
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002735 if (throttle_enabled(&cfg)) {
2736 /* Enable I/O limits if they're not enabled yet, otherwise
2737 * just update the throttling group. */
Alberto Garciaa0d64a62015-11-04 15:15:36 +02002738 if (!bs->throttle_state) {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002739 bdrv_io_limits_enable(bs, has_group ? group : device);
2740 } else if (has_group) {
2741 bdrv_io_limits_update_group(bs, group);
2742 }
2743 /* Set the new throttling configuration */
Benoît Canetcc0681c2013-09-02 14:14:39 +02002744 bdrv_set_io_limits(bs, &cfg);
Alberto Garciaa0d64a62015-11-04 15:15:36 +02002745 } else if (bs->throttle_state) {
Alberto Garcia76f4afb2015-06-08 18:17:44 +02002746 /* If all throttling settings are set to 0, disable I/O limits */
2747 bdrv_io_limits_disable(bs);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002748 }
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002749
Max Reitz5433c242015-10-19 17:53:29 +02002750out:
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02002751 aio_context_release(aio_context);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08002752}
2753
John Snow341ebc22015-04-17 19:49:52 -04002754void qmp_block_dirty_bitmap_add(const char *node, const char *name,
2755 bool has_granularity, uint32_t granularity,
2756 Error **errp)
2757{
2758 AioContext *aio_context;
2759 BlockDriverState *bs;
2760
2761 if (!name || name[0] == '\0') {
2762 error_setg(errp, "Bitmap name cannot be empty");
2763 return;
2764 }
2765
2766 bs = bdrv_lookup_bs(node, node, errp);
2767 if (!bs) {
2768 return;
2769 }
2770
2771 aio_context = bdrv_get_aio_context(bs);
2772 aio_context_acquire(aio_context);
2773
2774 if (has_granularity) {
2775 if (granularity < 512 || !is_power_of_2(granularity)) {
2776 error_setg(errp, "Granularity must be power of 2 "
2777 "and at least 512");
2778 goto out;
2779 }
2780 } else {
2781 /* Default to cluster size, if available: */
2782 granularity = bdrv_get_default_bitmap_granularity(bs);
2783 }
2784
2785 bdrv_create_dirty_bitmap(bs, granularity, name, errp);
2786
2787 out:
2788 aio_context_release(aio_context);
2789}
2790
2791void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
2792 Error **errp)
2793{
2794 AioContext *aio_context;
2795 BlockDriverState *bs;
2796 BdrvDirtyBitmap *bitmap;
2797
2798 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2799 if (!bitmap || !bs) {
2800 return;
2801 }
2802
John Snow9bd2b082015-04-17 19:49:57 -04002803 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2804 error_setg(errp,
2805 "Bitmap '%s' is currently frozen and cannot be removed",
2806 name);
2807 goto out;
2808 }
John Snow20dca812015-04-17 19:50:02 -04002809 bdrv_dirty_bitmap_make_anon(bitmap);
John Snow341ebc22015-04-17 19:49:52 -04002810 bdrv_release_dirty_bitmap(bs, bitmap);
2811
John Snow9bd2b082015-04-17 19:49:57 -04002812 out:
John Snow341ebc22015-04-17 19:49:52 -04002813 aio_context_release(aio_context);
2814}
2815
John Snowe74e6b72015-04-17 19:49:59 -04002816/**
2817 * Completely clear a bitmap, for the purposes of synchronizing a bitmap
2818 * immediately after a full backup operation.
2819 */
2820void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
2821 Error **errp)
2822{
2823 AioContext *aio_context;
2824 BdrvDirtyBitmap *bitmap;
2825 BlockDriverState *bs;
2826
2827 bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
2828 if (!bitmap || !bs) {
2829 return;
2830 }
2831
2832 if (bdrv_dirty_bitmap_frozen(bitmap)) {
2833 error_setg(errp,
2834 "Bitmap '%s' is currently frozen and cannot be modified",
2835 name);
2836 goto out;
2837 } else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
2838 error_setg(errp,
2839 "Bitmap '%s' is currently disabled and cannot be cleared",
2840 name);
2841 goto out;
2842 }
2843
Fam Zhengdf9a6812015-11-09 18:16:54 +08002844 bdrv_clear_dirty_bitmap(bitmap, NULL);
John Snowe74e6b72015-04-17 19:49:59 -04002845
2846 out:
2847 aio_context_release(aio_context);
2848}
2849
Markus Armbruster072ebe62015-03-05 17:00:56 +01002850void hmp_drive_del(Monitor *mon, const QDict *qdict)
Ryan Harper9063f812010-11-12 11:07:13 -06002851{
2852 const char *id = qdict_get_str(qdict, "id");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002853 BlockBackend *blk;
Ryan Harper9063f812010-11-12 11:07:13 -06002854 BlockDriverState *bs;
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002855 AioContext *aio_context;
Fam Zheng3718d8a2014-05-23 21:29:43 +08002856 Error *local_err = NULL;
Ryan Harper9063f812010-11-12 11:07:13 -06002857
Kevin Wolf2073d412016-02-23 17:50:37 +01002858 bs = bdrv_find_node(id);
2859 if (bs) {
2860 qmp_x_blockdev_del(false, NULL, true, id, &local_err);
2861 if (local_err) {
2862 error_report_err(local_err);
2863 }
2864 return;
2865 }
2866
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02002867 blk = blk_by_name(id);
2868 if (!blk) {
Markus Armbrusterb1422f22014-05-16 11:00:09 +02002869 error_report("Device '%s' not found", id);
Markus Armbruster072ebe62015-03-05 17:00:56 +01002870 return;
Ryan Harper9063f812010-11-12 11:07:13 -06002871 }
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002872
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02002873 if (!blk_legacy_dinfo(blk)) {
Markus Armbruster48f364d2014-09-11 16:45:39 +02002874 error_report("Deleting device added with blockdev-add"
2875 " is not supported");
Markus Armbruster072ebe62015-03-05 17:00:56 +01002876 return;
Markus Armbruster48f364d2014-09-11 16:45:39 +02002877 }
2878
Max Reitz5433c242015-10-19 17:53:29 +02002879 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002880 aio_context_acquire(aio_context);
2881
Max Reitz5433c242015-10-19 17:53:29 +02002882 bs = blk_bs(blk);
2883 if (bs) {
2884 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
2885 error_report_err(local_err);
2886 aio_context_release(aio_context);
2887 return;
2888 }
Ryan Harper9063f812010-11-12 11:07:13 -06002889
Max Reitz938abd42016-01-29 16:36:09 +01002890 blk_remove_bs(blk);
Max Reitz5433c242015-10-19 17:53:29 +02002891 }
Ryan Harper9063f812010-11-12 11:07:13 -06002892
Max Reitz7c735872016-03-16 19:54:39 +01002893 /* Make the BlockBackend and the attached BlockDriverState anonymous */
Max Reitzefaa7c42016-03-16 19:54:38 +01002894 monitor_remove_blk(blk);
2895
Max Reitz7c735872016-03-16 19:54:39 +01002896 /* If this BlockBackend has a device attached to it, its refcount will be
2897 * decremented when the device is removed; otherwise we have to do so here.
Ryan Harperd22b2f42011-03-29 20:51:47 -05002898 */
Markus Armbrustera7f53e22014-10-07 13:59:25 +02002899 if (blk_get_attached_dev(blk)) {
Stefan Hajnoczi293c51a2013-06-05 10:33:14 +02002900 /* Further I/O must not pause the guest */
Max Reitz373340b2015-10-19 17:53:22 +02002901 blk_set_on_error(blk, BLOCKDEV_ON_ERROR_REPORT,
2902 BLOCKDEV_ON_ERROR_REPORT);
Ryan Harperd22b2f42011-03-29 20:51:47 -05002903 } else {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +02002904 blk_unref(blk);
Ryan Harper9063f812010-11-12 11:07:13 -06002905 }
2906
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01002907 aio_context_release(aio_context);
Ryan Harper9063f812010-11-12 11:07:13 -06002908}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002909
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002910void qmp_block_resize(bool has_device, const char *device,
2911 bool has_node_name, const char *node_name,
2912 int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002913{
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002914 Error *local_err = NULL;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002915 BlockDriverState *bs;
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002916 AioContext *aio_context;
Kevin Wolf87329012013-05-02 15:32:55 +02002917 int ret;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002918
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002919 bs = bdrv_lookup_bs(has_device ? device : NULL,
2920 has_node_name ? node_name : NULL,
2921 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002922 if (local_err) {
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002923 error_propagate(errp, local_err);
2924 return;
2925 }
2926
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002927 aio_context = bdrv_get_aio_context(bs);
2928 aio_context_acquire(aio_context);
2929
Benoît Canet3b1dbd12014-01-23 21:31:37 +01002930 if (!bdrv_is_first_non_filter(bs)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002931 error_setg(errp, QERR_FEATURE_DISABLED, "resize");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002932 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002933 }
2934
2935 if (size < 0) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002936 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002937 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002938 }
2939
Jeff Cody9c75e162014-06-25 16:55:30 -04002940 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002941 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002942 goto out;
Jeff Cody9c75e162014-06-25 16:55:30 -04002943 }
2944
Peter Lieven92b7a082013-03-11 11:04:24 +01002945 /* complete all in-flight operations before resizing the device */
2946 bdrv_drain_all();
2947
Kevin Wolf87329012013-05-02 15:32:55 +02002948 ret = bdrv_truncate(bs, size);
2949 switch (ret) {
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002950 case 0:
2951 break;
2952 case -ENOMEDIUM:
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002953 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002954 break;
2955 case -ENOTSUP:
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002956 error_setg(errp, QERR_UNSUPPORTED);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002957 break;
2958 case -EACCES:
Alberto Garcia81e5f782015-04-08 12:29:19 +03002959 error_setg(errp, "Device '%s' is read only", device);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002960 break;
2961 case -EBUSY:
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01002962 error_setg(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002963 break;
2964 default:
Kevin Wolf87329012013-05-02 15:32:55 +02002965 error_setg_errno(errp, -ret, "Could not resize");
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00002966 break;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002967 }
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01002968
2969out:
2970 aio_context_release(aio_context);
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01002971}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002972
Jeff Cody9abf2db2012-09-27 13:29:14 -04002973static void block_job_cb(void *opaque, int ret)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002974{
Stefan Hajnoczi723c5d92014-10-21 12:03:53 +01002975 /* Note that this function may be executed from another AioContext besides
2976 * the QEMU main loop. If you need to access anything that assumes the
2977 * QEMU global mutex, use a BH or introduce a mutex.
2978 */
2979
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002980 BlockDriverState *bs = opaque;
Wenchao Xiabcada37b2014-06-18 08:43:47 +02002981 const char *msg = NULL;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002982
Jeff Cody9abf2db2012-09-27 13:29:14 -04002983 trace_block_job_cb(bs, bs->job, ret);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002984
2985 assert(bs->job);
Wenchao Xiabcada37b2014-06-18 08:43:47 +02002986
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002987 if (ret < 0) {
Wenchao Xiabcada37b2014-06-18 08:43:47 +02002988 msg = strerror(-ret);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002989 }
2990
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002991 if (block_job_is_cancelled(bs->job)) {
Wenchao Xiabcada37b2014-06-18 08:43:47 +02002992 block_job_event_cancelled(bs->job);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002993 } else {
Wenchao Xiabcada37b2014-06-18 08:43:47 +02002994 block_job_event_completed(bs->job, msg);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002995 }
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00002996}
2997
Jeff Cody13d8cc52014-06-25 15:40:11 -04002998void qmp_block_stream(const char *device,
2999 bool has_base, const char *base,
3000 bool has_backing_file, const char *backing_file,
3001 bool has_speed, int64_t speed,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003002 bool has_on_error, BlockdevOnError on_error,
3003 Error **errp)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003004{
Fam Zhenga0e85442015-03-02 19:36:48 +08003005 BlockBackend *blk;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003006 BlockDriverState *bs;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003007 BlockDriverState *base_bs = NULL;
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003008 AioContext *aio_context;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003009 Error *local_err = NULL;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003010 const char *base_name = NULL;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003011
Paolo Bonzini1d809092012-09-28 17:22:59 +02003012 if (!has_on_error) {
3013 on_error = BLOCKDEV_ON_ERROR_REPORT;
3014 }
3015
Fam Zhenga0e85442015-03-02 19:36:48 +08003016 blk = blk_by_name(device);
3017 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01003018 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3019 "Device '%s' not found", device);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003020 return;
3021 }
3022
Max Reitz5433c242015-10-19 17:53:29 +02003023 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003024 aio_context_acquire(aio_context);
3025
Max Reitz5433c242015-10-19 17:53:29 +02003026 if (!blk_is_available(blk)) {
3027 error_setg(errp, "Device '%s' has no medium", device);
3028 goto out;
3029 }
3030 bs = blk_bs(blk);
3031
Fam Zheng628ff682014-05-23 21:29:44 +08003032 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003033 goto out;
Fam Zheng628ff682014-05-23 21:29:44 +08003034 }
3035
Jeff Cody13d8cc52014-06-25 15:40:11 -04003036 if (has_base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003037 base_bs = bdrv_find_backing_image(bs, base);
3038 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003039 error_setg(errp, QERR_BASE_NOT_FOUND, base);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003040 goto out;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00003041 }
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003042 assert(bdrv_get_aio_context(base_bs) == aio_context);
Jeff Cody13d8cc52014-06-25 15:40:11 -04003043 base_name = base;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003044 }
3045
Jeff Cody13d8cc52014-06-25 15:40:11 -04003046 /* if we are streaming the entire chain, the result will have no backing
3047 * file, and specifying one is therefore an error */
3048 if (base_bs == NULL && has_backing_file) {
3049 error_setg(errp, "backing file specified, but streaming the "
3050 "entire chain");
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003051 goto out;
Jeff Cody13d8cc52014-06-25 15:40:11 -04003052 }
3053
3054 /* backing_file string overrides base bs filename */
3055 base_name = has_backing_file ? backing_file : base_name;
3056
3057 stream_start(bs, base_bs, base_name, has_speed ? speed : 0,
Paolo Bonzini1d809092012-09-28 17:22:59 +02003058 on_error, block_job_cb, bs, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003059 if (local_err) {
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01003060 error_propagate(errp, local_err);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003061 goto out;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003062 }
3063
3064 trace_qmp_block_stream(bs, bs->job);
Stefan Hajnoczif3e69be2014-10-21 12:03:57 +01003065
3066out:
3067 aio_context_release(aio_context);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00003068}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003069
Jeff Codyed61fc12012-09-27 13:29:16 -04003070void qmp_block_commit(const char *device,
Jeff Cody7676e2c2014-06-30 15:14:15 +02003071 bool has_base, const char *base,
3072 bool has_top, const char *top,
Jeff Cody54e26902014-06-25 15:40:10 -04003073 bool has_backing_file, const char *backing_file,
Jeff Codyed61fc12012-09-27 13:29:16 -04003074 bool has_speed, int64_t speed,
3075 Error **errp)
3076{
Fam Zhenga0e85442015-03-02 19:36:48 +08003077 BlockBackend *blk;
Jeff Codyed61fc12012-09-27 13:29:16 -04003078 BlockDriverState *bs;
3079 BlockDriverState *base_bs, *top_bs;
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003080 AioContext *aio_context;
Jeff Codyed61fc12012-09-27 13:29:16 -04003081 Error *local_err = NULL;
3082 /* This will be part of the QMP command, if/when the
3083 * BlockdevOnError change for blkmirror makes it in
3084 */
Paolo Bonzini92aa5c62012-09-28 17:22:55 +02003085 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
Jeff Codyed61fc12012-09-27 13:29:16 -04003086
Max Reitz54504662014-04-10 19:36:25 +02003087 if (!has_speed) {
3088 speed = 0;
3089 }
3090
Jeff Cody7676e2c2014-06-30 15:14:15 +02003091 /* Important Note:
3092 * libvirt relies on the DeviceNotFound error class in order to probe for
3093 * live commit feature versions; for this to work, we must make sure to
3094 * perform the device lookup before any generic errors that may occur in a
3095 * scenario in which all optional arguments are omitted. */
Fam Zhenga0e85442015-03-02 19:36:48 +08003096 blk = blk_by_name(device);
3097 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01003098 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3099 "Device '%s' not found", device);
Jeff Codyed61fc12012-09-27 13:29:16 -04003100 return;
3101 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003102
Max Reitz5433c242015-10-19 17:53:29 +02003103 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003104 aio_context_acquire(aio_context);
3105
Max Reitz5433c242015-10-19 17:53:29 +02003106 if (!blk_is_available(blk)) {
3107 error_setg(errp, "Device '%s' has no medium", device);
3108 goto out;
3109 }
3110 bs = blk_bs(blk);
3111
Fam Zhengbb000212014-09-11 13:14:00 +08003112 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT_SOURCE, errp)) {
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003113 goto out;
Fam Zheng628ff682014-05-23 21:29:44 +08003114 }
3115
Jeff Codyed61fc12012-09-27 13:29:16 -04003116 /* default top_bs is the active layer */
3117 top_bs = bs;
3118
Jeff Cody7676e2c2014-06-30 15:14:15 +02003119 if (has_top && top) {
Jeff Codyed61fc12012-09-27 13:29:16 -04003120 if (strcmp(bs->filename, top) != 0) {
3121 top_bs = bdrv_find_backing_image(bs, top);
3122 }
3123 }
3124
3125 if (top_bs == NULL) {
3126 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003127 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003128 }
3129
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003130 assert(bdrv_get_aio_context(top_bs) == aio_context);
3131
Jeff Codyd5208c42012-10-16 15:49:10 -04003132 if (has_base && base) {
3133 base_bs = bdrv_find_backing_image(top_bs, base);
3134 } else {
3135 base_bs = bdrv_find_base(top_bs);
3136 }
3137
3138 if (base_bs == NULL) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003139 error_setg(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003140 goto out;
Jeff Codyd5208c42012-10-16 15:49:10 -04003141 }
3142
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003143 assert(bdrv_get_aio_context(base_bs) == aio_context);
3144
Fam Zhengbb000212014-09-11 13:14:00 +08003145 if (bdrv_op_is_blocked(base_bs, BLOCK_OP_TYPE_COMMIT_TARGET, errp)) {
3146 goto out;
3147 }
3148
Jeff Cody7676e2c2014-06-30 15:14:15 +02003149 /* Do not allow attempts to commit an image into itself */
3150 if (top_bs == base_bs) {
3151 error_setg(errp, "cannot commit an image into itself");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003152 goto out;
Jeff Cody7676e2c2014-06-30 15:14:15 +02003153 }
3154
Fam Zheng20a63d22013-12-16 14:45:31 +08003155 if (top_bs == bs) {
Jeff Cody54e26902014-06-25 15:40:10 -04003156 if (has_backing_file) {
3157 error_setg(errp, "'backing-file' specified,"
3158 " but 'top' is the active layer");
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003159 goto out;
Jeff Cody54e26902014-06-25 15:40:10 -04003160 }
Fam Zheng20a63d22013-12-16 14:45:31 +08003161 commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
3162 bs, &local_err);
3163 } else {
3164 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
Jeff Cody54e26902014-06-25 15:40:10 -04003165 has_backing_file ? backing_file : NULL, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08003166 }
Jeff Codyed61fc12012-09-27 13:29:16 -04003167 if (local_err != NULL) {
3168 error_propagate(errp, local_err);
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003169 goto out;
Jeff Codyed61fc12012-09-27 13:29:16 -04003170 }
Stefan Hajnoczi9e85cd52014-10-21 12:03:59 +01003171
3172out:
3173 aio_context_release(aio_context);
Jeff Codyed61fc12012-09-27 13:29:16 -04003174}
3175
John Snow78f51fd2015-11-05 18:13:17 -05003176static void do_drive_backup(const char *device, const char *target,
3177 bool has_format, const char *format,
3178 enum MirrorSyncMode sync,
3179 bool has_mode, enum NewImageMode mode,
3180 bool has_speed, int64_t speed,
3181 bool has_bitmap, const char *bitmap,
3182 bool has_on_source_error,
3183 BlockdevOnError on_source_error,
3184 bool has_on_target_error,
3185 BlockdevOnError on_target_error,
3186 BlockJobTxn *txn, Error **errp)
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003187{
Fam Zhenga0e85442015-03-02 19:36:48 +08003188 BlockBackend *blk;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003189 BlockDriverState *bs;
3190 BlockDriverState *target_bs;
Ian Mainfc5d3f82013-07-26 11:39:04 -07003191 BlockDriverState *source = NULL;
John Snowd58d8452015-04-17 19:49:58 -04003192 BdrvDirtyBitmap *bmap = NULL;
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003193 AioContext *aio_context;
Max Reitze6641712015-08-26 19:47:48 +02003194 QDict *options = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003195 Error *local_err = NULL;
3196 int flags;
3197 int64_t size;
3198 int ret;
3199
3200 if (!has_speed) {
3201 speed = 0;
3202 }
3203 if (!has_on_source_error) {
3204 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3205 }
3206 if (!has_on_target_error) {
3207 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3208 }
3209 if (!has_mode) {
3210 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3211 }
3212
Fam Zhenga0e85442015-03-02 19:36:48 +08003213 blk = blk_by_name(device);
3214 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01003215 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3216 "Device '%s' not found", device);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003217 return;
3218 }
3219
Max Reitz5433c242015-10-19 17:53:29 +02003220 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003221 aio_context_acquire(aio_context);
3222
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003223 /* Although backup_run has this check too, we need to use bs->drv below, so
3224 * do an early check redundantly. */
Max Reitz5433c242015-10-19 17:53:29 +02003225 if (!blk_is_available(blk)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003226 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003227 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003228 }
Max Reitz5433c242015-10-19 17:53:29 +02003229 bs = blk_bs(blk);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003230
3231 if (!has_format) {
3232 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
3233 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003234
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003235 /* Early check to avoid creating target */
Fam Zheng3718d8a2014-05-23 21:29:43 +08003236 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003237 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003238 }
3239
Kevin Wolf73ac4512016-03-14 15:46:03 +01003240 flags = bs->open_flags | BDRV_O_CACHE_WB | BDRV_O_RDWR;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003241
Ian Mainfc5d3f82013-07-26 11:39:04 -07003242 /* See if we have a backing HD we can use to create our new image
3243 * on top of. */
3244 if (sync == MIRROR_SYNC_MODE_TOP) {
Kevin Wolf760e0062015-06-17 14:55:21 +02003245 source = backing_bs(bs);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003246 if (!source) {
3247 sync = MIRROR_SYNC_MODE_FULL;
3248 }
3249 }
3250 if (sync == MIRROR_SYNC_MODE_NONE) {
3251 source = bs;
3252 }
3253
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003254 size = bdrv_getlength(bs);
3255 if (size < 0) {
3256 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003257 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003258 }
3259
3260 if (mode != NEW_IMAGE_MODE_EXISTING) {
Max Reitze6641712015-08-26 19:47:48 +02003261 assert(format);
Ian Mainfc5d3f82013-07-26 11:39:04 -07003262 if (source) {
3263 bdrv_img_create(target, format, source->filename,
3264 source->drv->format_name, NULL,
3265 size, flags, &local_err, false);
3266 } else {
3267 bdrv_img_create(target, format, NULL, NULL, NULL,
3268 size, flags, &local_err, false);
3269 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003270 }
3271
Markus Armbruster84d18f02014-01-30 15:07:28 +01003272 if (local_err) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003273 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003274 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003275 }
3276
Max Reitze6641712015-08-26 19:47:48 +02003277 if (format) {
3278 options = qdict_new();
3279 qdict_put(options, "driver", qstring_from_str(format));
3280 }
3281
Max Reitzf67503e2014-02-18 18:33:05 +01003282 target_bs = NULL;
Max Reitz6ebf9aa2015-08-26 19:47:49 +02003283 ret = bdrv_open(&target_bs, target, NULL, options, flags, &local_err);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003284 if (ret < 0) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02003285 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003286 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003287 }
3288
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003289 bdrv_set_aio_context(target_bs, aio_context);
3290
John Snowd58d8452015-04-17 19:49:58 -04003291 if (has_bitmap) {
3292 bmap = bdrv_find_dirty_bitmap(bs, bitmap);
3293 if (!bmap) {
3294 error_setg(errp, "Bitmap '%s' could not be found", bitmap);
Max Reitz0702d3d2015-11-09 23:39:10 +01003295 bdrv_unref(target_bs);
John Snowd58d8452015-04-17 19:49:58 -04003296 goto out;
3297 }
3298 }
3299
3300 backup_start(bs, target_bs, speed, sync, bmap,
3301 on_source_error, on_target_error,
John Snow78f51fd2015-11-05 18:13:17 -05003302 block_job_cb, bs, txn, &local_err);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003303 if (local_err != NULL) {
Fam Zheng4f6fd342013-08-23 09:14:47 +08003304 bdrv_unref(target_bs);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003305 error_propagate(errp, local_err);
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003306 goto out;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003307 }
Stefan Hajnoczi761731b2014-10-21 12:03:56 +01003308
3309out:
3310 aio_context_release(aio_context);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02003311}
3312
John Snow78f51fd2015-11-05 18:13:17 -05003313void qmp_drive_backup(const char *device, const char *target,
3314 bool has_format, const char *format,
3315 enum MirrorSyncMode sync,
3316 bool has_mode, enum NewImageMode mode,
3317 bool has_speed, int64_t speed,
3318 bool has_bitmap, const char *bitmap,
3319 bool has_on_source_error, BlockdevOnError on_source_error,
3320 bool has_on_target_error, BlockdevOnError on_target_error,
3321 Error **errp)
3322{
3323 return do_drive_backup(device, target, has_format, format, sync,
3324 has_mode, mode, has_speed, speed,
3325 has_bitmap, bitmap,
3326 has_on_source_error, on_source_error,
3327 has_on_target_error, on_target_error,
3328 NULL, errp);
3329}
3330
Benoît Canetc13163f2014-01-23 21:31:34 +01003331BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
3332{
Alberto Garciad5a8ee62015-04-17 14:52:43 +03003333 return bdrv_named_nodes_list(errp);
Benoît Canetc13163f2014-01-23 21:31:34 +01003334}
3335
John Snow78f51fd2015-11-05 18:13:17 -05003336void do_blockdev_backup(const char *device, const char *target,
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003337 enum MirrorSyncMode sync,
3338 bool has_speed, int64_t speed,
3339 bool has_on_source_error,
3340 BlockdevOnError on_source_error,
3341 bool has_on_target_error,
3342 BlockdevOnError on_target_error,
John Snow78f51fd2015-11-05 18:13:17 -05003343 BlockJobTxn *txn, Error **errp)
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003344{
Max Reitz5433c242015-10-19 17:53:29 +02003345 BlockBackend *blk, *target_blk;
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003346 BlockDriverState *bs;
3347 BlockDriverState *target_bs;
3348 Error *local_err = NULL;
3349 AioContext *aio_context;
3350
3351 if (!has_speed) {
3352 speed = 0;
3353 }
3354 if (!has_on_source_error) {
3355 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3356 }
3357 if (!has_on_target_error) {
3358 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3359 }
3360
Fam Zhenga0e85442015-03-02 19:36:48 +08003361 blk = blk_by_name(device);
3362 if (!blk) {
Markus Armbruster5b347c52015-03-17 08:36:14 +01003363 error_setg(errp, "Device '%s' not found", device);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003364 return;
3365 }
3366
Max Reitz5433c242015-10-19 17:53:29 +02003367 aio_context = blk_get_aio_context(blk);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003368 aio_context_acquire(aio_context);
3369
Max Reitz5433c242015-10-19 17:53:29 +02003370 if (!blk_is_available(blk)) {
3371 error_setg(errp, "Device '%s' has no medium", device);
3372 goto out;
3373 }
3374 bs = blk_bs(blk);
3375
3376 target_blk = blk_by_name(target);
3377 if (!target_blk) {
Markus Armbruster5b347c52015-03-17 08:36:14 +01003378 error_setg(errp, "Device '%s' not found", target);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003379 goto out;
3380 }
Max Reitz5433c242015-10-19 17:53:29 +02003381
3382 if (!blk_is_available(target_blk)) {
3383 error_setg(errp, "Device '%s' has no medium", target);
3384 goto out;
3385 }
3386 target_bs = blk_bs(target_blk);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003387
3388 bdrv_ref(target_bs);
3389 bdrv_set_aio_context(target_bs, aio_context);
John Snowd58d8452015-04-17 19:49:58 -04003390 backup_start(bs, target_bs, speed, sync, NULL, on_source_error,
John Snow78f51fd2015-11-05 18:13:17 -05003391 on_target_error, block_job_cb, bs, txn, &local_err);
Fam Zhengc29c1dd2014-12-18 18:37:05 +08003392 if (local_err != NULL) {
3393 bdrv_unref(target_bs);
3394 error_propagate(errp, local_err);
3395 }
3396out:
3397 aio_context_release(aio_context);
3398}
3399
John Snow78f51fd2015-11-05 18:13:17 -05003400void qmp_blockdev_backup(const char *device, const char *target,
3401 enum MirrorSyncMode sync,
3402 bool has_speed, int64_t speed,
3403 bool has_on_source_error,
3404 BlockdevOnError on_source_error,
3405 bool has_on_target_error,
3406 BlockdevOnError on_target_error,
3407 Error **errp)
3408{
3409 do_blockdev_backup(device, target, sync, has_speed, speed,
3410 has_on_source_error, on_source_error,
3411 has_on_target_error, on_target_error,
3412 NULL, errp);
3413}
3414
Fam Zheng4193cdd2015-12-24 12:45:03 +08003415/* Parameter check and block job starting for drive mirroring.
3416 * Caller should hold @device and @target's aio context (must be the same).
3417 **/
3418static void blockdev_mirror_common(BlockDriverState *bs,
3419 BlockDriverState *target,
3420 bool has_replaces, const char *replaces,
3421 enum MirrorSyncMode sync,
3422 bool has_speed, int64_t speed,
3423 bool has_granularity, uint32_t granularity,
3424 bool has_buf_size, int64_t buf_size,
3425 bool has_on_source_error,
3426 BlockdevOnError on_source_error,
3427 bool has_on_target_error,
3428 BlockdevOnError on_target_error,
3429 bool has_unmap, bool unmap,
3430 Error **errp)
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003431{
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003432
3433 if (!has_speed) {
3434 speed = 0;
3435 }
Paolo Bonzinib952b552012-10-18 16:49:28 +02003436 if (!has_on_source_error) {
3437 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
3438 }
3439 if (!has_on_target_error) {
3440 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
3441 }
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003442 if (!has_granularity) {
3443 granularity = 0;
3444 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003445 if (!has_buf_size) {
Wen Congyang48ac0a42015-05-15 15:51:36 +08003446 buf_size = 0;
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003447 }
Fam Zheng0fc9f8e2015-06-08 13:56:08 +08003448 if (!has_unmap) {
3449 unmap = true;
3450 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01003451
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003452 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003453 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3454 "a value in range [512B, 64MB]");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003455 return;
3456 }
3457 if (granularity & (granularity - 1)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003458 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
3459 "power of 2");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01003460 return;
3461 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003462
Fam Zheng4193cdd2015-12-24 12:45:03 +08003463 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR_SOURCE, errp)) {
3464 return;
3465 }
Fam Zhenge40e5022015-12-24 12:45:04 +08003466 if (bdrv_op_is_blocked(target, BLOCK_OP_TYPE_MIRROR_TARGET, errp)) {
3467 return;
3468 }
Fam Zhengdf925622015-12-24 12:45:05 +08003469 if (target->blk) {
3470 error_setg(errp, "Cannot mirror to an attached block device");
3471 return;
3472 }
Fam Zheng4193cdd2015-12-24 12:45:03 +08003473
3474 if (!bs->backing && sync == MIRROR_SYNC_MODE_TOP) {
3475 sync = MIRROR_SYNC_MODE_FULL;
3476 }
3477
3478 /* pass the node name to replace to mirror start since it's loose coupling
3479 * and will allow to check whether the node still exist at mirror completion
3480 */
3481 mirror_start(bs, target,
3482 has_replaces ? replaces : NULL,
3483 speed, granularity, buf_size, sync,
3484 on_source_error, on_target_error, unmap,
3485 block_job_cb, bs, errp);
3486}
3487
3488void qmp_drive_mirror(const char *device, const char *target,
3489 bool has_format, const char *format,
3490 bool has_node_name, const char *node_name,
3491 bool has_replaces, const char *replaces,
3492 enum MirrorSyncMode sync,
3493 bool has_mode, enum NewImageMode mode,
3494 bool has_speed, int64_t speed,
3495 bool has_granularity, uint32_t granularity,
3496 bool has_buf_size, int64_t buf_size,
3497 bool has_on_source_error, BlockdevOnError on_source_error,
3498 bool has_on_target_error, BlockdevOnError on_target_error,
3499 bool has_unmap, bool unmap,
3500 Error **errp)
3501{
3502 BlockDriverState *bs;
3503 BlockBackend *blk;
3504 BlockDriverState *source, *target_bs;
3505 AioContext *aio_context;
3506 Error *local_err = NULL;
3507 QDict *options = NULL;
3508 int flags;
3509 int64_t size;
3510 int ret;
3511
Fam Zhenga0e85442015-03-02 19:36:48 +08003512 blk = blk_by_name(device);
3513 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01003514 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3515 "Device '%s' not found", device);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003516 return;
3517 }
3518
Max Reitz5433c242015-10-19 17:53:29 +02003519 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003520 aio_context_acquire(aio_context);
3521
Max Reitz5433c242015-10-19 17:53:29 +02003522 if (!blk_is_available(blk)) {
Markus Armbrusterc6bd8c72015-03-17 11:54:50 +01003523 error_setg(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003524 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003525 }
Max Reitz5433c242015-10-19 17:53:29 +02003526 bs = blk_bs(blk);
Fam Zheng4193cdd2015-12-24 12:45:03 +08003527 if (!has_mode) {
3528 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
3529 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003530
3531 if (!has_format) {
3532 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
3533 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003534
Kevin Wolf73ac4512016-03-14 15:46:03 +01003535 flags = bs->open_flags | BDRV_O_CACHE_WB | BDRV_O_RDWR;
Kevin Wolf760e0062015-06-17 14:55:21 +02003536 source = backing_bs(bs);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003537 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
3538 sync = MIRROR_SYNC_MODE_FULL;
3539 }
Max Reitz117e0c82013-11-25 20:28:55 +01003540 if (sync == MIRROR_SYNC_MODE_NONE) {
3541 source = bs;
3542 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003543
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003544 size = bdrv_getlength(bs);
3545 if (size < 0) {
3546 error_setg_errno(errp, -size, "bdrv_getlength failed");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003547 goto out;
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02003548 }
3549
Benoît Canet09158f02014-06-27 18:25:25 +02003550 if (has_replaces) {
3551 BlockDriverState *to_replace_bs;
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003552 AioContext *replace_aio_context;
3553 int64_t replace_size;
Benoît Canet09158f02014-06-27 18:25:25 +02003554
3555 if (!has_node_name) {
3556 error_setg(errp, "a node-name must be provided when replacing a"
3557 " named node of the graph");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003558 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003559 }
3560
Wen Congyange12f3782015-07-17 10:12:22 +08003561 to_replace_bs = check_to_replace_node(bs, replaces, &local_err);
Benoît Canet09158f02014-06-27 18:25:25 +02003562
3563 if (!to_replace_bs) {
3564 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003565 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003566 }
3567
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003568 replace_aio_context = bdrv_get_aio_context(to_replace_bs);
3569 aio_context_acquire(replace_aio_context);
3570 replace_size = bdrv_getlength(to_replace_bs);
3571 aio_context_release(replace_aio_context);
3572
3573 if (size != replace_size) {
Benoît Canet09158f02014-06-27 18:25:25 +02003574 error_setg(errp, "cannot replace image with a mirror image of "
3575 "different size");
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003576 goto out;
Benoît Canet09158f02014-06-27 18:25:25 +02003577 }
3578 }
3579
Max Reitz14526862013-11-06 19:50:44 +01003580 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
3581 && mode != NEW_IMAGE_MODE_EXISTING)
3582 {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003583 /* create new image w/o backing file */
Max Reitze6641712015-08-26 19:47:48 +02003584 assert(format);
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003585 bdrv_img_create(target, format,
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01003586 NULL, NULL, NULL, size, flags, &local_err, false);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003587 } else {
3588 switch (mode) {
3589 case NEW_IMAGE_MODE_EXISTING:
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003590 break;
3591 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
3592 /* create new image with backing file */
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003593 bdrv_img_create(target, format,
3594 source->filename,
3595 source->drv->format_name,
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01003596 NULL, size, flags, &local_err, false);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003597 break;
3598 default:
3599 abort();
3600 }
3601 }
3602
Markus Armbruster84d18f02014-01-30 15:07:28 +01003603 if (local_err) {
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02003604 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003605 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003606 }
3607
Max Reitze6641712015-08-26 19:47:48 +02003608 options = qdict_new();
Benoît Canet4c828dc2014-06-16 12:00:55 +02003609 if (has_node_name) {
Benoît Canet4c828dc2014-06-16 12:00:55 +02003610 qdict_put(options, "node-name", qstring_from_str(node_name));
3611 }
Max Reitze6641712015-08-26 19:47:48 +02003612 if (format) {
3613 qdict_put(options, "driver", qstring_from_str(format));
3614 }
Benoît Canet4c828dc2014-06-16 12:00:55 +02003615
Paolo Bonzinib812f672013-01-21 17:09:43 +01003616 /* Mirroring takes care of copy-on-write using the source's backing
3617 * file.
3618 */
Max Reitzf67503e2014-02-18 18:33:05 +01003619 target_bs = NULL;
Benoît Canet4c828dc2014-06-16 12:00:55 +02003620 ret = bdrv_open(&target_bs, target, NULL, options,
Max Reitz6ebf9aa2015-08-26 19:47:49 +02003621 flags | BDRV_O_NO_BACKING, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003622 if (ret < 0) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02003623 error_propagate(errp, local_err);
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003624 goto out;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003625 }
3626
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003627 bdrv_set_aio_context(target_bs, aio_context);
3628
Fam Zheng4193cdd2015-12-24 12:45:03 +08003629 blockdev_mirror_common(bs, target_bs,
3630 has_replaces, replaces, sync,
3631 has_speed, speed,
3632 has_granularity, granularity,
3633 has_buf_size, buf_size,
3634 has_on_source_error, on_source_error,
3635 has_on_target_error, on_target_error,
3636 has_unmap, unmap,
3637 &local_err);
3638 if (local_err) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003639 error_propagate(errp, local_err);
Fam Zheng4193cdd2015-12-24 12:45:03 +08003640 bdrv_unref(target_bs);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003641 }
Stefan Hajnoczi5a7e7a02014-10-21 12:03:58 +01003642out:
3643 aio_context_release(aio_context);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02003644}
3645
Fam Zhengdf925622015-12-24 12:45:05 +08003646void qmp_blockdev_mirror(const char *device, const char *target,
3647 bool has_replaces, const char *replaces,
3648 MirrorSyncMode sync,
3649 bool has_speed, int64_t speed,
3650 bool has_granularity, uint32_t granularity,
3651 bool has_buf_size, int64_t buf_size,
3652 bool has_on_source_error,
3653 BlockdevOnError on_source_error,
3654 bool has_on_target_error,
3655 BlockdevOnError on_target_error,
3656 Error **errp)
3657{
3658 BlockDriverState *bs;
3659 BlockBackend *blk;
3660 BlockDriverState *target_bs;
3661 AioContext *aio_context;
3662 Error *local_err = NULL;
3663
3664 blk = blk_by_name(device);
3665 if (!blk) {
3666 error_setg(errp, "Device '%s' not found", device);
3667 return;
3668 }
3669 bs = blk_bs(blk);
3670
3671 if (!bs) {
3672 error_setg(errp, "Device '%s' has no media", device);
3673 return;
3674 }
3675
3676 target_bs = bdrv_lookup_bs(target, target, errp);
3677 if (!target_bs) {
3678 return;
3679 }
3680
3681 aio_context = bdrv_get_aio_context(bs);
3682 aio_context_acquire(aio_context);
3683
3684 bdrv_ref(target_bs);
3685 bdrv_set_aio_context(target_bs, aio_context);
3686
3687 blockdev_mirror_common(bs, target_bs,
3688 has_replaces, replaces, sync,
3689 has_speed, speed,
3690 has_granularity, granularity,
3691 has_buf_size, buf_size,
3692 has_on_source_error, on_source_error,
3693 has_on_target_error, on_target_error,
3694 true, true,
3695 &local_err);
3696 if (local_err) {
3697 error_propagate(errp, local_err);
3698 bdrv_unref(target_bs);
3699 }
3700
3701 aio_context_release(aio_context);
3702}
3703
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003704/* Get the block job for a given device name and acquire its AioContext */
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003705static BlockJob *find_block_job(const char *device, AioContext **aio_context,
3706 Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003707{
Fam Zhenga0e85442015-03-02 19:36:48 +08003708 BlockBackend *blk;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003709 BlockDriverState *bs;
3710
Max Reitz5433c242015-10-19 17:53:29 +02003711 *aio_context = NULL;
3712
Fam Zhenga0e85442015-03-02 19:36:48 +08003713 blk = blk_by_name(device);
3714 if (!blk) {
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003715 goto notfound;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003716 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003717
Max Reitz5433c242015-10-19 17:53:29 +02003718 *aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003719 aio_context_acquire(*aio_context);
3720
Max Reitz5433c242015-10-19 17:53:29 +02003721 if (!blk_is_available(blk)) {
3722 goto notfound;
3723 }
3724 bs = blk_bs(blk);
3725
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003726 if (!bs->job) {
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003727 goto notfound;
3728 }
3729
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003730 return bs->job;
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003731
3732notfound:
Markus Armbruster2e3a0262015-01-29 10:36:59 +01003733 error_set(errp, ERROR_CLASS_DEVICE_NOT_ACTIVE,
3734 "No active block job on device '%s'", device);
Max Reitz5433c242015-10-19 17:53:29 +02003735 if (*aio_context) {
3736 aio_context_release(*aio_context);
3737 *aio_context = NULL;
3738 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003739 return NULL;
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003740}
3741
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003742void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003743{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003744 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003745 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003746
3747 if (!job) {
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003748 return;
3749 }
3750
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01003751 block_job_set_speed(job, speed, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003752 aio_context_release(aio_context);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00003753}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003754
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003755void qmp_block_job_cancel(const char *device,
3756 bool has_force, bool force, Error **errp)
3757{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003758 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003759 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003760
3761 if (!job) {
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003762 return;
3763 }
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003764
3765 if (!has_force) {
3766 force = false;
3767 }
3768
Fam Zheng751ebd72015-04-03 22:05:18 +08003769 if (job->user_paused && !force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04003770 error_setg(errp, "The block job for device '%s' is currently paused",
3771 device);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003772 goto out;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003773 }
3774
3775 trace_qmp_block_job_cancel(job);
3776 block_job_cancel(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003777out:
3778 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003779}
3780
3781void qmp_block_job_pause(const char *device, Error **errp)
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003782{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003783 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003784 BlockJob *job = find_block_job(device, &aio_context, errp);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003785
Fam Zheng751ebd72015-04-03 22:05:18 +08003786 if (!job || job->user_paused) {
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003787 return;
3788 }
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003789
Fam Zheng751ebd72015-04-03 22:05:18 +08003790 job->user_paused = true;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003791 trace_qmp_block_job_pause(job);
3792 block_job_pause(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003793 aio_context_release(aio_context);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003794}
3795
3796void qmp_block_job_resume(const char *device, Error **errp)
3797{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003798 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003799 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003800
Fam Zheng751ebd72015-04-03 22:05:18 +08003801 if (!job || !job->user_paused) {
Paolo Bonzini8acc72a2012-09-28 17:22:50 +02003802 return;
3803 }
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003804
Fam Zheng751ebd72015-04-03 22:05:18 +08003805 job->user_paused = false;
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02003806 trace_qmp_block_job_resume(job);
3807 block_job_resume(job);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003808 aio_context_release(aio_context);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00003809}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00003810
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003811void qmp_block_job_complete(const char *device, Error **errp)
3812{
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003813 AioContext *aio_context;
Markus Armbruster24d6bff2015-01-29 10:36:58 +01003814 BlockJob *job = find_block_job(device, &aio_context, errp);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003815
3816 if (!job) {
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003817 return;
3818 }
3819
3820 trace_qmp_block_job_complete(job);
3821 block_job_complete(job, errp);
Stefan Hajnoczi3d948cd2014-10-21 12:03:50 +01003822 aio_context_release(aio_context);
Paolo Bonziniaeae8832012-10-18 16:49:21 +02003823}
3824
Jeff Codyfa40e652014-07-01 09:52:16 +02003825void qmp_change_backing_file(const char *device,
3826 const char *image_node_name,
3827 const char *backing_file,
3828 Error **errp)
3829{
Fam Zhenga0e85442015-03-02 19:36:48 +08003830 BlockBackend *blk;
Jeff Codyfa40e652014-07-01 09:52:16 +02003831 BlockDriverState *bs = NULL;
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003832 AioContext *aio_context;
Jeff Codyfa40e652014-07-01 09:52:16 +02003833 BlockDriverState *image_bs = NULL;
3834 Error *local_err = NULL;
3835 bool ro;
3836 int open_flags;
3837 int ret;
3838
Fam Zhenga0e85442015-03-02 19:36:48 +08003839 blk = blk_by_name(device);
3840 if (!blk) {
Markus Armbruster75158eb2015-03-16 08:57:47 +01003841 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
3842 "Device '%s' not found", device);
Jeff Codyfa40e652014-07-01 09:52:16 +02003843 return;
3844 }
3845
Max Reitz5433c242015-10-19 17:53:29 +02003846 aio_context = blk_get_aio_context(blk);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003847 aio_context_acquire(aio_context);
3848
Max Reitz5433c242015-10-19 17:53:29 +02003849 if (!blk_is_available(blk)) {
3850 error_setg(errp, "Device '%s' has no medium", device);
3851 goto out;
3852 }
3853 bs = blk_bs(blk);
3854
Jeff Codyfa40e652014-07-01 09:52:16 +02003855 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
3856 if (local_err) {
3857 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003858 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003859 }
3860
3861 if (!image_bs) {
3862 error_setg(errp, "image file not found");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003863 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003864 }
3865
3866 if (bdrv_find_base(image_bs) == image_bs) {
3867 error_setg(errp, "not allowing backing file change on an image "
3868 "without a backing file");
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003869 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003870 }
3871
3872 /* even though we are not necessarily operating on bs, we need it to
3873 * determine if block ops are currently prohibited on the chain */
3874 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003875 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003876 }
3877
3878 /* final sanity check */
3879 if (!bdrv_chain_contains(bs, image_bs)) {
3880 error_setg(errp, "'%s' and image file are not in the same chain",
3881 device);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003882 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003883 }
3884
3885 /* if not r/w, reopen to make r/w */
3886 open_flags = image_bs->open_flags;
3887 ro = bdrv_is_read_only(image_bs);
3888
3889 if (ro) {
3890 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
3891 if (local_err) {
3892 error_propagate(errp, local_err);
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003893 goto out;
Jeff Codyfa40e652014-07-01 09:52:16 +02003894 }
3895 }
3896
3897 ret = bdrv_change_backing_file(image_bs, backing_file,
3898 image_bs->drv ? image_bs->drv->format_name : "");
3899
3900 if (ret < 0) {
3901 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
3902 backing_file);
3903 /* don't exit here, so we can try to restore open flags if
3904 * appropriate */
3905 }
3906
3907 if (ro) {
3908 bdrv_reopen(image_bs, open_flags, &local_err);
3909 if (local_err) {
3910 error_propagate(errp, local_err); /* will preserve prior errp */
3911 }
3912 }
Stefan Hajnoczi729962f2014-11-19 14:19:45 +00003913
3914out:
3915 aio_context_release(aio_context);
Jeff Codyfa40e652014-07-01 09:52:16 +02003916}
3917
Kevin Wolfabb21ac2016-02-23 17:33:24 +01003918void hmp_drive_add_node(Monitor *mon, const char *optstr)
3919{
3920 QemuOpts *opts;
3921 QDict *qdict;
3922 Error *local_err = NULL;
3923
3924 opts = qemu_opts_parse_noisily(&qemu_drive_opts, optstr, false);
3925 if (!opts) {
3926 return;
3927 }
3928
3929 qdict = qemu_opts_to_qdict(opts, NULL);
3930
3931 if (!qdict_get_try_str(qdict, "node-name")) {
Kevin Wolff8746fb2016-03-16 11:14:31 +01003932 QDECREF(qdict);
Kevin Wolfabb21ac2016-02-23 17:33:24 +01003933 error_report("'node-name' needs to be specified");
3934 goto out;
3935 }
3936
3937 BlockDriverState *bs = bds_tree_init(qdict, &local_err);
3938 if (!bs) {
3939 error_report_err(local_err);
3940 goto out;
3941 }
3942
3943 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
3944
3945out:
3946 qemu_opts_del(opts);
3947}
3948
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003949void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
3950{
3951 QmpOutputVisitor *ov = qmp_output_visitor_new();
Max Reitzbe4b67b2015-10-19 17:53:09 +02003952 BlockDriverState *bs;
3953 BlockBackend *blk = NULL;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003954 QObject *obj;
3955 QDict *qdict;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003956 Error *local_err = NULL;
3957
Markus Armbruster60e19e02014-06-06 14:50:58 +02003958 /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003959 * cache.direct=false instead of silently switching to aio=threads, except
Markus Armbruster60e19e02014-06-06 14:50:58 +02003960 * when called from drive_new().
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003961 *
3962 * For now, simply forbidding the combination for all drivers will do. */
3963 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
Kevin Wolfc6e0bd92014-03-06 15:47:32 +01003964 bool direct = options->has_cache &&
3965 options->cache->has_direct &&
3966 options->cache->direct;
3967 if (!direct) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003968 error_setg(errp, "aio=native requires cache.direct=true");
3969 goto fail;
3970 }
3971 }
3972
Eric Blake51e72bc2016-01-29 06:48:54 -07003973 visit_type_BlockdevOptions(qmp_output_get_visitor(ov), NULL, &options,
3974 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01003975 if (local_err) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02003976 error_propagate(errp, local_err);
3977 goto fail;
3978 }
3979
3980 obj = qmp_output_get_qobject(ov);
3981 qdict = qobject_to_qdict(obj);
3982
3983 qdict_flatten(qdict);
3984
Max Reitzbe4b67b2015-10-19 17:53:09 +02003985 if (options->has_id) {
3986 blk = blockdev_init(NULL, qdict, &local_err);
3987 if (local_err) {
3988 error_propagate(errp, local_err);
3989 goto fail;
3990 }
3991
3992 bs = blk_bs(blk);
3993 } else {
Max Reitzbe4b67b2015-10-19 17:53:09 +02003994 if (!qdict_get_try_str(qdict, "node-name")) {
3995 error_setg(errp, "'id' and/or 'node-name' need to be specified for "
3996 "the root node");
3997 goto fail;
3998 }
3999
Max Reitzbd745e22015-10-19 17:53:32 +02004000 bs = bds_tree_init(qdict, errp);
4001 if (!bs) {
Max Reitzbe4b67b2015-10-19 17:53:09 +02004002 goto fail;
4003 }
Max Reitz9c4218e2016-01-29 16:36:12 +01004004
4005 QTAILQ_INSERT_TAIL(&monitor_bdrv_states, bs, monitor_list);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004006 }
4007
Max Reitzbe4b67b2015-10-19 17:53:09 +02004008 if (bs && bdrv_key_required(bs)) {
4009 if (blk) {
Max Reitzefaa7c42016-03-16 19:54:38 +01004010 monitor_remove_blk(blk);
Max Reitzbe4b67b2015-10-19 17:53:09 +02004011 blk_unref(blk);
4012 } else {
Max Reitz9c4218e2016-01-29 16:36:12 +01004013 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
Max Reitzbe4b67b2015-10-19 17:53:09 +02004014 bdrv_unref(bs);
4015 }
Kevin Wolf8ae8e902014-03-06 15:43:42 +01004016 error_setg(errp, "blockdev-add doesn't support encrypted devices");
4017 goto fail;
4018 }
4019
Kevin Wolfd26c9a12013-09-23 15:26:03 +02004020fail:
4021 qmp_output_visitor_cleanup(ov);
4022}
4023
Alberto Garcia81b936a2015-11-02 16:51:55 +02004024void qmp_x_blockdev_del(bool has_id, const char *id,
4025 bool has_node_name, const char *node_name, Error **errp)
4026{
4027 AioContext *aio_context;
4028 BlockBackend *blk;
4029 BlockDriverState *bs;
4030
4031 if (has_id && has_node_name) {
4032 error_setg(errp, "Only one of id and node-name must be specified");
4033 return;
4034 } else if (!has_id && !has_node_name) {
4035 error_setg(errp, "No block device specified");
4036 return;
4037 }
4038
4039 if (has_id) {
Max Reitzefaa7c42016-03-16 19:54:38 +01004040 /* blk_by_name() never returns a BB that is not owned by the monitor */
Alberto Garcia81b936a2015-11-02 16:51:55 +02004041 blk = blk_by_name(id);
4042 if (!blk) {
4043 error_setg(errp, "Cannot find block backend %s", id);
4044 return;
4045 }
4046 if (blk_get_refcnt(blk) > 1) {
4047 error_setg(errp, "Block backend %s is in use", id);
4048 return;
4049 }
4050 bs = blk_bs(blk);
4051 aio_context = blk_get_aio_context(blk);
4052 } else {
4053 bs = bdrv_find_node(node_name);
4054 if (!bs) {
4055 error_setg(errp, "Cannot find node %s", node_name);
4056 return;
4057 }
4058 blk = bs->blk;
4059 if (blk) {
4060 error_setg(errp, "Node %s is in use by %s",
4061 node_name, blk_name(blk));
4062 return;
4063 }
4064 aio_context = bdrv_get_aio_context(bs);
4065 }
4066
4067 aio_context_acquire(aio_context);
4068
4069 if (bs) {
4070 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, errp)) {
4071 goto out;
4072 }
4073
Max Reitz9c4218e2016-01-29 16:36:12 +01004074 if (!blk && !bs->monitor_list.tqe_prev) {
4075 error_setg(errp, "Node %s is not owned by the monitor",
4076 bs->node_name);
4077 goto out;
4078 }
4079
4080 if (bs->refcnt > 1) {
Alberto Garcia81b936a2015-11-02 16:51:55 +02004081 error_setg(errp, "Block device %s is in use",
4082 bdrv_get_device_or_node_name(bs));
4083 goto out;
4084 }
4085 }
4086
4087 if (blk) {
Max Reitzefaa7c42016-03-16 19:54:38 +01004088 monitor_remove_blk(blk);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004089 blk_unref(blk);
4090 } else {
Max Reitz9c4218e2016-01-29 16:36:12 +01004091 QTAILQ_REMOVE(&monitor_bdrv_states, bs, monitor_list);
Alberto Garcia81b936a2015-11-02 16:51:55 +02004092 bdrv_unref(bs);
4093 }
4094
4095out:
4096 aio_context_release(aio_context);
4097}
4098
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004099BlockJobInfoList *qmp_query_block_jobs(Error **errp)
4100{
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004101 BlockJobInfoList *head = NULL, **p_next = &head;
4102 BlockDriverState *bs;
4103
4104 for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004105 AioContext *aio_context = bdrv_get_aio_context(bs);
4106
4107 aio_context_acquire(aio_context);
4108
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004109 if (bs->job) {
4110 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
4111 elem->value = block_job_query(bs->job);
4112 *p_next = elem;
4113 p_next = &elem->next;
4114 }
Stefan Hajnoczi69691e72014-10-21 12:03:51 +01004115
4116 aio_context_release(aio_context);
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02004117 }
4118
4119 return head;
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00004120}
Paolo Bonzini4d454572012-11-26 16:03:42 +01004121
Kevin Wolf00063832013-03-15 10:35:07 +01004122QemuOptsList qemu_common_drive_opts = {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004123 .name = "drive",
Kevin Wolf00063832013-03-15 10:35:07 +01004124 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
Paolo Bonzini4d454572012-11-26 16:03:42 +01004125 .desc = {
4126 {
Paolo Bonzini4d454572012-11-26 16:03:42 +01004127 .name = "snapshot",
4128 .type = QEMU_OPT_BOOL,
4129 .help = "enable/disable snapshot mode",
4130 },{
Paolo Bonzinia9384af2013-02-08 14:06:12 +01004131 .name = "discard",
4132 .type = QEMU_OPT_STRING,
4133 .help = "discard operation (ignore/off, unmap/on)",
4134 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004135 .name = "aio",
4136 .type = QEMU_OPT_STRING,
4137 .help = "host AIO implementation (threads, native)",
4138 },{
Kevin Wolfe4b24b42016-03-15 15:39:42 +01004139 .name = BDRV_OPT_CACHE_WB,
4140 .type = QEMU_OPT_BOOL,
4141 .help = "Enable writeback mode",
4142 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004143 .name = "format",
4144 .type = QEMU_OPT_STRING,
4145 .help = "disk format (raw, qcow2, ...)",
4146 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004147 .name = "rerror",
4148 .type = QEMU_OPT_STRING,
4149 .help = "read error action",
4150 },{
4151 .name = "werror",
4152 .type = QEMU_OPT_STRING,
4153 .help = "write error action",
4154 },{
Kevin Wolf0f227a92013-07-19 20:07:29 +02004155 .name = "read-only",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004156 .type = QEMU_OPT_BOOL,
4157 .help = "open drive file as read-only",
4158 },{
Kevin Wolf57975222013-07-17 14:41:54 +02004159 .name = "throttling.iops-total",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004160 .type = QEMU_OPT_NUMBER,
4161 .help = "limit total I/O operations per second",
4162 },{
Kevin Wolf57975222013-07-17 14:41:54 +02004163 .name = "throttling.iops-read",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004164 .type = QEMU_OPT_NUMBER,
4165 .help = "limit read operations per second",
4166 },{
Kevin Wolf57975222013-07-17 14:41:54 +02004167 .name = "throttling.iops-write",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004168 .type = QEMU_OPT_NUMBER,
4169 .help = "limit write operations per second",
4170 },{
Kevin Wolf57975222013-07-17 14:41:54 +02004171 .name = "throttling.bps-total",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004172 .type = QEMU_OPT_NUMBER,
4173 .help = "limit total bytes per second",
4174 },{
Kevin Wolf57975222013-07-17 14:41:54 +02004175 .name = "throttling.bps-read",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004176 .type = QEMU_OPT_NUMBER,
4177 .help = "limit read bytes per second",
4178 },{
Kevin Wolf57975222013-07-17 14:41:54 +02004179 .name = "throttling.bps-write",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004180 .type = QEMU_OPT_NUMBER,
4181 .help = "limit write bytes per second",
4182 },{
Benoît Canet3e9fab62013-09-02 14:14:40 +02004183 .name = "throttling.iops-total-max",
4184 .type = QEMU_OPT_NUMBER,
4185 .help = "I/O operations burst",
4186 },{
4187 .name = "throttling.iops-read-max",
4188 .type = QEMU_OPT_NUMBER,
4189 .help = "I/O operations read burst",
4190 },{
4191 .name = "throttling.iops-write-max",
4192 .type = QEMU_OPT_NUMBER,
4193 .help = "I/O operations write burst",
4194 },{
4195 .name = "throttling.bps-total-max",
4196 .type = QEMU_OPT_NUMBER,
4197 .help = "total bytes burst",
4198 },{
4199 .name = "throttling.bps-read-max",
4200 .type = QEMU_OPT_NUMBER,
4201 .help = "total bytes read burst",
4202 },{
4203 .name = "throttling.bps-write-max",
4204 .type = QEMU_OPT_NUMBER,
4205 .help = "total bytes write burst",
4206 },{
Alberto Garcia8a0fc182016-02-18 12:27:02 +02004207 .name = "throttling.iops-total-max-length",
4208 .type = QEMU_OPT_NUMBER,
4209 .help = "length of the iops-total-max burst period, in seconds",
4210 },{
4211 .name = "throttling.iops-read-max-length",
4212 .type = QEMU_OPT_NUMBER,
4213 .help = "length of the iops-read-max burst period, in seconds",
4214 },{
4215 .name = "throttling.iops-write-max-length",
4216 .type = QEMU_OPT_NUMBER,
4217 .help = "length of the iops-write-max burst period, in seconds",
4218 },{
4219 .name = "throttling.bps-total-max-length",
4220 .type = QEMU_OPT_NUMBER,
4221 .help = "length of the bps-total-max burst period, in seconds",
4222 },{
4223 .name = "throttling.bps-read-max-length",
4224 .type = QEMU_OPT_NUMBER,
4225 .help = "length of the bps-read-max burst period, in seconds",
4226 },{
4227 .name = "throttling.bps-write-max-length",
4228 .type = QEMU_OPT_NUMBER,
4229 .help = "length of the bps-write-max burst period, in seconds",
4230 },{
Benoît Canet2024c1d2013-09-02 14:14:41 +02004231 .name = "throttling.iops-size",
4232 .type = QEMU_OPT_NUMBER,
4233 .help = "when limiting by iops max size of an I/O in bytes",
4234 },{
Alberto Garcia76f4afb2015-06-08 18:17:44 +02004235 .name = "throttling.group",
4236 .type = QEMU_OPT_STRING,
4237 .help = "name of the block throttling group",
4238 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01004239 .name = "copy-on-read",
4240 .type = QEMU_OPT_BOOL,
4241 .help = "copy read data from backing file into image file",
Peter Lieven465bee12014-05-18 00:58:19 +02004242 },{
4243 .name = "detect-zeroes",
4244 .type = QEMU_OPT_STRING,
4245 .help = "try to optimize zero writes (off, on, unmap)",
Alberto Garcia362e9292015-10-28 17:33:04 +02004246 },{
4247 .name = "stats-account-invalid",
4248 .type = QEMU_OPT_BOOL,
4249 .help = "whether to account for invalid I/O operations "
4250 "in the statistics",
4251 },{
4252 .name = "stats-account-failed",
4253 .type = QEMU_OPT_BOOL,
4254 .help = "whether to account for failed I/O operations "
4255 "in the statistics",
Paolo Bonzini4d454572012-11-26 16:03:42 +01004256 },
4257 { /* end of list */ }
4258 },
4259};
Kevin Wolf00063832013-03-15 10:35:07 +01004260
Max Reitzbd745e22015-10-19 17:53:32 +02004261static QemuOptsList qemu_root_bds_opts = {
4262 .name = "root-bds",
Kevin Wolf23f7fcb2016-03-15 14:43:14 +01004263 .head = QTAILQ_HEAD_INITIALIZER(qemu_root_bds_opts.head),
Max Reitzbd745e22015-10-19 17:53:32 +02004264 .desc = {
4265 {
4266 .name = "discard",
4267 .type = QEMU_OPT_STRING,
4268 .help = "discard operation (ignore/off, unmap/on)",
4269 },{
Max Reitzbd745e22015-10-19 17:53:32 +02004270 .name = "aio",
4271 .type = QEMU_OPT_STRING,
4272 .help = "host AIO implementation (threads, native)",
4273 },{
4274 .name = "read-only",
4275 .type = QEMU_OPT_BOOL,
4276 .help = "open drive file as read-only",
4277 },{
4278 .name = "copy-on-read",
4279 .type = QEMU_OPT_BOOL,
4280 .help = "copy read data from backing file into image file",
4281 },{
4282 .name = "detect-zeroes",
4283 .type = QEMU_OPT_STRING,
4284 .help = "try to optimize zero writes (off, on, unmap)",
4285 },
4286 { /* end of list */ }
4287 },
4288};
4289
Kevin Wolf00063832013-03-15 10:35:07 +01004290QemuOptsList qemu_drive_opts = {
4291 .name = "drive",
4292 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
4293 .desc = {
Kevin Wolf492fdc62013-06-19 13:44:17 +02004294 /*
4295 * no elements => accept any params
4296 * validation will happen later
4297 */
Kevin Wolf00063832013-03-15 10:35:07 +01004298 { /* end of list */ }
4299 },
4300};