blob: eb743a956cf68cd7b40edb28138aeb1647b3a4c1 [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
Markus Armbruster26f54e92014-10-07 13:59:04 +020033#include "sysemu/block-backend.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010034#include "sysemu/blockdev.h"
Paolo Bonzini0d09e412013-02-05 17:06:20 +010035#include "hw/block/block.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010036#include "block/blockjob.h"
Paolo Bonzini83c90892012-12-17 18:19:49 +010037#include "monitor/monitor.h"
Paolo Bonzini1de7afc2012-12-17 18:20:00 +010038#include "qemu/option.h"
39#include "qemu/config-file.h"
Paolo Bonzini7b1b5d12012-12-17 18:19:43 +010040#include "qapi/qmp/types.h"
Kevin Wolfd26c9a12013-09-23 15:26:03 +020041#include "qapi-visit.h"
42#include "qapi/qmp-output-visitor.h"
Peter Lieven9e7dac72014-08-13 19:20:17 +020043#include "qapi/util.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010044#include "sysemu/sysemu.h"
Paolo Bonzini737e1502012-12-17 18:19:44 +010045#include "block/block_int.h"
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -020046#include "qmp-commands.h"
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +000047#include "trace.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010048#include "sysemu/arch_init.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020049
Markus Armbruster19609662011-01-28 11:21:39 +010050static const char *const if_name[IF_COUNT] = {
51 [IF_NONE] = "none",
52 [IF_IDE] = "ide",
53 [IF_SCSI] = "scsi",
54 [IF_FLOPPY] = "floppy",
55 [IF_PFLASH] = "pflash",
56 [IF_MTD] = "mtd",
57 [IF_SD] = "sd",
58 [IF_VIRTIO] = "virtio",
59 [IF_XEN] = "xen",
60};
61
John Snow21dff8c2014-10-01 14:19:25 -040062static int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010063 /*
64 * Do not change these numbers! They govern how drive option
65 * index maps to unit and bus. That mapping is ABI.
66 *
67 * All controllers used to imlement if=T drives need to support
68 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
69 * Otherwise, some index values map to "impossible" bus, unit
70 * values.
71 *
72 * For instance, if you change [IF_SCSI] to 255, -drive
73 * if=scsi,index=12 no longer means bus=1,unit=5, but
74 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
75 * the drive can't be set up. Regression.
76 */
77 [IF_IDE] = 2,
78 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +010079};
80
John Snow21dff8c2014-10-01 14:19:25 -040081/**
82 * Boards may call this to offer board-by-board overrides
83 * of the default, global values.
84 */
85void override_max_devs(BlockInterfaceType type, int max_devs)
86{
Markus Armbruster18e46a02014-10-07 13:59:06 +020087 BlockBackend *blk;
John Snow21dff8c2014-10-01 14:19:25 -040088 DriveInfo *dinfo;
89
90 if (max_devs <= 0) {
91 return;
92 }
93
Markus Armbruster18e46a02014-10-07 13:59:06 +020094 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
95 dinfo = blk_legacy_dinfo(blk);
John Snow21dff8c2014-10-01 14:19:25 -040096 if (dinfo->type == type) {
97 fprintf(stderr, "Cannot override units-per-bus property of"
98 " the %s interface, because a drive of that type has"
99 " already been added.\n", if_name[type]);
100 g_assert_not_reached();
101 }
102 }
103
104 if_max_devs[type] = max_devs;
105}
106
Markus Armbruster14bafc52010-06-25 08:09:10 +0200107/*
108 * We automatically delete the drive when a device using it gets
109 * unplugged. Questionable feature, but we can't just drop it.
110 * Device models call blockdev_mark_auto_del() to schedule the
111 * automatic deletion, and generic qdev code calls blockdev_auto_del()
112 * when deletion is actually safe.
113 */
Markus Armbruster4be74632014-10-07 13:59:18 +0200114void blockdev_mark_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200115{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200116 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster4be74632014-10-07 13:59:18 +0200117 BlockDriverState *bs = blk_bs(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200118
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200119 if (!dinfo) {
Kevin Wolf2d246f02013-09-18 15:14:47 +0200120 return;
121 }
122
Paolo Bonzini12bde0e2012-03-30 13:17:10 +0200123 if (bs->job) {
124 block_job_cancel(bs->job);
125 }
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200126 dinfo->auto_del = 1;
Markus Armbruster14bafc52010-06-25 08:09:10 +0200127}
128
Markus Armbruster4be74632014-10-07 13:59:18 +0200129void blockdev_auto_del(BlockBackend *blk)
Markus Armbruster14bafc52010-06-25 08:09:10 +0200130{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200131 DriveInfo *dinfo = blk_legacy_dinfo(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200132
Ryan Harper0fc0f1f2010-12-08 10:05:00 -0600133 if (dinfo && dinfo->auto_del) {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +0200134 blk_unref(blk);
Markus Armbruster14bafc52010-06-25 08:09:10 +0200135 }
136}
137
John Snowd8f94e12014-10-01 14:19:27 -0400138/**
139 * Returns the current mapping of how many units per bus
140 * a particular interface can support.
141 *
142 * A positive integer indicates n units per bus.
143 * 0 implies the mapping has not been established.
144 * -1 indicates an invalid BlockInterfaceType was given.
145 */
146int drive_get_max_devs(BlockInterfaceType type)
147{
148 if (type >= IF_IDE && type < IF_COUNT) {
149 return if_max_devs[type];
150 }
151
152 return -1;
153}
154
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100155static int drive_index_to_bus_id(BlockInterfaceType type, int index)
156{
157 int max_devs = if_max_devs[type];
158 return max_devs ? index / max_devs : 0;
159}
160
161static int drive_index_to_unit_id(BlockInterfaceType type, int index)
162{
163 int max_devs = if_max_devs[type];
164 return max_devs ? index % max_devs : index;
165}
166
Markus Armbruster2292dda2011-01-28 11:21:41 +0100167QemuOpts *drive_def(const char *optstr)
168{
169 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
170}
171
172QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100173 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200174{
Markus Armbruster666daa62010-06-02 18:48:27 +0200175 QemuOpts *opts;
Markus Armbruster2292dda2011-01-28 11:21:41 +0100176 char buf[32];
Markus Armbruster666daa62010-06-02 18:48:27 +0200177
Markus Armbruster2292dda2011-01-28 11:21:41 +0100178 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200179 if (!opts) {
180 return NULL;
181 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100182 if (type != IF_DEFAULT) {
183 qemu_opt_set(opts, "if", if_name[type]);
184 }
185 if (index >= 0) {
186 snprintf(buf, sizeof(buf), "%d", index);
187 qemu_opt_set(opts, "index", buf);
188 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200189 if (file)
190 qemu_opt_set(opts, "file", file);
191 return opts;
192}
193
194DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
195{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200196 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200197 DriveInfo *dinfo;
198
Markus Armbruster18e46a02014-10-07 13:59:06 +0200199 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
200 dinfo = blk_legacy_dinfo(blk);
201 if (dinfo && dinfo->type == type
202 && dinfo->bus == bus && dinfo->unit == unit) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200203 return dinfo;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200204 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200205 }
206
207 return NULL;
208}
209
John Snowa66c9dc2014-10-01 14:19:24 -0400210bool drive_check_orphaned(void)
211{
Markus Armbruster18e46a02014-10-07 13:59:06 +0200212 BlockBackend *blk;
John Snowa66c9dc2014-10-01 14:19:24 -0400213 DriveInfo *dinfo;
214 bool rs = false;
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);
John Snowa66c9dc2014-10-01 14:19:24 -0400218 /* If dinfo->bdrv->dev is NULL, it has no device attached. */
219 /* Unless this is a default drive, this may be an oversight. */
Markus Armbrustera7f53e22014-10-07 13:59:25 +0200220 if (!blk_get_attached_dev(blk) && !dinfo->is_default &&
John Snowa66c9dc2014-10-01 14:19:24 -0400221 dinfo->type != IF_NONE) {
222 fprintf(stderr, "Warning: Orphaned drive without device: "
223 "id=%s,file=%s,if=%s,bus=%d,unit=%d\n",
Markus Armbrusterd3aeb1b2014-10-07 13:59:21 +0200224 blk_name(blk), blk_bs(blk)->filename, if_name[dinfo->type],
John Snowa66c9dc2014-10-01 14:19:24 -0400225 dinfo->bus, dinfo->unit);
226 rs = true;
227 }
228 }
229
230 return rs;
231}
232
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100233DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
234{
235 return drive_get(type,
236 drive_index_to_bus_id(type, index),
237 drive_index_to_unit_id(type, index));
238}
239
Markus Armbruster666daa62010-06-02 18:48:27 +0200240int drive_get_max_bus(BlockInterfaceType type)
241{
242 int max_bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200243 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +0200244 DriveInfo *dinfo;
245
246 max_bus = -1;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200247 for (blk = blk_next(NULL); blk; blk = blk_next(blk)) {
248 dinfo = blk_legacy_dinfo(blk);
249 if (dinfo && dinfo->type == type && dinfo->bus > max_bus) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200250 max_bus = dinfo->bus;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200251 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200252 }
253 return max_bus;
254}
255
Markus Armbruster13839972011-01-28 11:21:37 +0100256/* Get a block device. This should only be used for single-drive devices
257 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
258 appropriate bus. */
259DriveInfo *drive_get_next(BlockInterfaceType type)
260{
261 static int next_block_unit[IF_COUNT];
262
263 return drive_get(type, 0, next_block_unit[type]++);
264}
265
Markus Armbruster666daa62010-06-02 18:48:27 +0200266static void bdrv_format_print(void *opaque, const char *name)
267{
Markus Armbruster807105a2011-01-17 19:31:27 +0100268 error_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200269}
270
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000271typedef struct {
272 QEMUBH *bh;
Fam Zhengfa510eb2013-08-23 09:14:51 +0800273 BlockDriverState *bs;
274} BDRVPutRefBH;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000275
Fam Zhengfa510eb2013-08-23 09:14:51 +0800276static void bdrv_put_ref_bh(void *opaque)
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000277{
Fam Zhengfa510eb2013-08-23 09:14:51 +0800278 BDRVPutRefBH *s = opaque;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000279
Fam Zhengfa510eb2013-08-23 09:14:51 +0800280 bdrv_unref(s->bs);
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000281 qemu_bh_delete(s->bh);
282 g_free(s);
283}
284
285/*
Fam Zhengfa510eb2013-08-23 09:14:51 +0800286 * Release a BDS reference in a BH
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000287 *
Fam Zhengfa510eb2013-08-23 09:14:51 +0800288 * It is not safe to use bdrv_unref() from a callback function when the callers
289 * still need the BlockDriverState. In such cases we schedule a BH to release
290 * the reference.
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000291 */
Fam Zhengfa510eb2013-08-23 09:14:51 +0800292static void bdrv_put_ref_bh_schedule(BlockDriverState *bs)
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000293{
Fam Zhengfa510eb2013-08-23 09:14:51 +0800294 BDRVPutRefBH *s;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000295
Fam Zhengfa510eb2013-08-23 09:14:51 +0800296 s = g_new(BDRVPutRefBH, 1);
297 s->bh = qemu_bh_new(bdrv_put_ref_bh, s);
298 s->bs = bs;
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000299 qemu_bh_schedule(s->bh);
300}
301
Kevin Wolfb6810722013-09-20 11:33:11 +0200302static int parse_block_error_action(const char *buf, bool is_read, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200303{
304 if (!strcmp(buf, "ignore")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200305 return BLOCKDEV_ON_ERROR_IGNORE;
Markus Armbruster666daa62010-06-02 18:48:27 +0200306 } else if (!is_read && !strcmp(buf, "enospc")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200307 return BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200308 } else if (!strcmp(buf, "stop")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200309 return BLOCKDEV_ON_ERROR_STOP;
Markus Armbruster666daa62010-06-02 18:48:27 +0200310 } else if (!strcmp(buf, "report")) {
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200311 return BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200312 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200313 error_setg(errp, "'%s' invalid %s error action",
314 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200315 return -1;
316 }
317}
318
Benoît Canetcc0681c2013-09-02 14:14:39 +0200319static bool check_throttle_config(ThrottleConfig *cfg, Error **errp)
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800320{
Benoît Canetcc0681c2013-09-02 14:14:39 +0200321 if (throttle_conflicting(cfg)) {
322 error_setg(errp, "bps/iops/max total values and read/write values"
323 " cannot be used at the same time");
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800324 return false;
325 }
326
Benoît Canetcc0681c2013-09-02 14:14:39 +0200327 if (!throttle_is_valid(cfg)) {
328 error_setg(errp, "bps/iops/maxs values must be 0 or greater");
Stefan Hajnoczi7d81c142013-02-13 16:53:43 +0100329 return false;
330 }
331
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800332 return true;
333}
334
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200335typedef enum { MEDIA_DISK, MEDIA_CDROM } DriveMediaType;
336
Kevin Wolff298d072013-09-10 12:01:20 +0200337/* Takes the ownership of bs_opts */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200338static BlockBackend *blockdev_init(const char *file, QDict *bs_opts,
339 Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200340{
341 const char *buf;
Markus Armbruster666daa62010-06-02 18:48:27 +0200342 int ro = 0;
343 int bdrv_flags = 0;
344 int on_read_error, on_write_error;
Markus Armbruster26f54e92014-10-07 13:59:04 +0200345 BlockBackend *blk;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200346 BlockDriverState *bs;
Benoît Canetcc0681c2013-09-02 14:14:39 +0200347 ThrottleConfig cfg;
Markus Armbruster666daa62010-06-02 18:48:27 +0200348 int snapshot = 0;
Stefan Hajnoczifb0490f2011-11-17 13:40:32 +0000349 bool copy_on_read;
Markus Armbruster666daa62010-06-02 18:48:27 +0200350 int ret;
Stefan Hajnoczic5461942013-02-13 16:53:42 +0100351 Error *error = NULL;
Kevin Wolf00063832013-03-15 10:35:07 +0100352 QemuOpts *opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100353 const char *id;
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200354 bool has_driver_specific_opts;
Peter Lieven465bee12014-05-18 00:58:19 +0200355 BlockdevDetectZeroesOptions detect_zeroes;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400356 BlockDriver *drv = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200357
Kevin Wolff298d072013-09-10 12:01:20 +0200358 /* Check common options by copying from bs_opts to opts, all other options
359 * stay in bs_opts for processing by bdrv_open(). */
360 id = qdict_get_try_str(bs_opts, "id");
Kevin Wolf00063832013-03-15 10:35:07 +0100361 opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100362 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200363 error_propagate(errp, error);
Markus Armbruster6376f952014-05-28 11:17:01 +0200364 goto err_no_opts;
Kevin Wolf00063832013-03-15 10:35:07 +0100365 }
366
Kevin Wolf00063832013-03-15 10:35:07 +0100367 qemu_opts_absorb_qdict(opts, bs_opts, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100368 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200369 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100370 goto early_err;
Kevin Wolf00063832013-03-15 10:35:07 +0100371 }
372
373 if (id) {
374 qdict_del(bs_opts, "id");
375 }
376
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200377 has_driver_specific_opts = !!qdict_size(bs_opts);
378
Markus Armbruster666daa62010-06-02 18:48:27 +0200379 /* extract parameters */
Markus Armbruster666daa62010-06-02 18:48:27 +0200380 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
Kevin Wolf0f227a92013-07-19 20:07:29 +0200381 ro = qemu_opt_get_bool(opts, "read-only", 0);
Stefan Hajnoczifb0490f2011-11-17 13:40:32 +0000382 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
Markus Armbruster666daa62010-06-02 18:48:27 +0200383
Paolo Bonzinia9384af2013-02-08 14:06:12 +0100384 if ((buf = qemu_opt_get(opts, "discard")) != NULL) {
385 if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200386 error_setg(errp, "invalid discard option");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100387 goto early_err;
Paolo Bonzinia9384af2013-02-08 14:06:12 +0100388 }
389 }
390
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200391 if (qemu_opt_get_bool(opts, "cache.writeback", true)) {
392 bdrv_flags |= BDRV_O_CACHE_WB;
393 }
394 if (qemu_opt_get_bool(opts, "cache.direct", false)) {
395 bdrv_flags |= BDRV_O_NOCACHE;
396 }
Paolo Bonzini1df6fa42013-09-19 18:48:53 +0200397 if (qemu_opt_get_bool(opts, "cache.no-flush", false)) {
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200398 bdrv_flags |= BDRV_O_NO_FLUSH;
Markus Armbruster666daa62010-06-02 18:48:27 +0200399 }
400
401#ifdef CONFIG_LINUX_AIO
402 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
403 if (!strcmp(buf, "native")) {
404 bdrv_flags |= BDRV_O_NATIVE_AIO;
405 } else if (!strcmp(buf, "threads")) {
406 /* this is the default */
407 } else {
Kevin Wolfb6810722013-09-20 11:33:11 +0200408 error_setg(errp, "invalid aio option");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100409 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200410 }
411 }
412#endif
413
414 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
Peter Maydellc8057f92012-08-02 13:45:54 +0100415 if (is_help_option(buf)) {
416 error_printf("Supported formats:");
417 bdrv_iterate_format(bdrv_format_print, NULL);
418 error_printf("\n");
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100419 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200420 }
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200421
Kevin Wolf8f94a6e2013-10-10 11:45:55 +0200422 drv = bdrv_find_format(buf);
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400423 if (!drv) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200424 error_setg(errp, "'%s' invalid format", buf);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100425 goto early_err;
Mike Qiu6db5f5d2013-08-08 10:45:16 -0400426 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200427 }
428
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800429 /* disk I/O throttling */
Benoît Canetcc0681c2013-09-02 14:14:39 +0200430 memset(&cfg, 0, sizeof(cfg));
431 cfg.buckets[THROTTLE_BPS_TOTAL].avg =
Kevin Wolf57975222013-07-17 14:41:54 +0200432 qemu_opt_get_number(opts, "throttling.bps-total", 0);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200433 cfg.buckets[THROTTLE_BPS_READ].avg =
Kevin Wolf57975222013-07-17 14:41:54 +0200434 qemu_opt_get_number(opts, "throttling.bps-read", 0);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200435 cfg.buckets[THROTTLE_BPS_WRITE].avg =
Kevin Wolf57975222013-07-17 14:41:54 +0200436 qemu_opt_get_number(opts, "throttling.bps-write", 0);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200437 cfg.buckets[THROTTLE_OPS_TOTAL].avg =
Kevin Wolf57975222013-07-17 14:41:54 +0200438 qemu_opt_get_number(opts, "throttling.iops-total", 0);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200439 cfg.buckets[THROTTLE_OPS_READ].avg =
Kevin Wolf57975222013-07-17 14:41:54 +0200440 qemu_opt_get_number(opts, "throttling.iops-read", 0);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200441 cfg.buckets[THROTTLE_OPS_WRITE].avg =
Kevin Wolf57975222013-07-17 14:41:54 +0200442 qemu_opt_get_number(opts, "throttling.iops-write", 0);
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800443
Benoît Canet3e9fab62013-09-02 14:14:40 +0200444 cfg.buckets[THROTTLE_BPS_TOTAL].max =
445 qemu_opt_get_number(opts, "throttling.bps-total-max", 0);
446 cfg.buckets[THROTTLE_BPS_READ].max =
447 qemu_opt_get_number(opts, "throttling.bps-read-max", 0);
448 cfg.buckets[THROTTLE_BPS_WRITE].max =
449 qemu_opt_get_number(opts, "throttling.bps-write-max", 0);
450 cfg.buckets[THROTTLE_OPS_TOTAL].max =
451 qemu_opt_get_number(opts, "throttling.iops-total-max", 0);
452 cfg.buckets[THROTTLE_OPS_READ].max =
453 qemu_opt_get_number(opts, "throttling.iops-read-max", 0);
454 cfg.buckets[THROTTLE_OPS_WRITE].max =
455 qemu_opt_get_number(opts, "throttling.iops-write-max", 0);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200456
Benoît Canet2024c1d2013-09-02 14:14:41 +0200457 cfg.op_size = qemu_opt_get_number(opts, "throttling.iops-size", 0);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200458
459 if (!check_throttle_config(&cfg, &error)) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200460 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100461 goto early_err;
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800462 }
463
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200464 on_write_error = BLOCKDEV_ON_ERROR_ENOSPC;
Markus Armbruster666daa62010-06-02 18:48:27 +0200465 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200466 on_write_error = parse_block_error_action(buf, 0, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100467 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200468 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100469 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200470 }
471 }
472
Paolo Bonzini92aa5c62012-09-28 17:22:55 +0200473 on_read_error = BLOCKDEV_ON_ERROR_REPORT;
Markus Armbruster666daa62010-06-02 18:48:27 +0200474 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200475 on_read_error = parse_block_error_action(buf, 1, &error);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100476 if (error) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200477 error_propagate(errp, error);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100478 goto early_err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200479 }
480 }
481
Peter Lieven465bee12014-05-18 00:58:19 +0200482 detect_zeroes =
Peter Lieven9e7dac72014-08-13 19:20:17 +0200483 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
484 qemu_opt_get(opts, "detect-zeroes"),
485 BLOCKDEV_DETECT_ZEROES_OPTIONS_MAX,
486 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
487 &error);
Peter Lieven465bee12014-05-18 00:58:19 +0200488 if (error) {
489 error_propagate(errp, error);
490 goto early_err;
491 }
492
493 if (detect_zeroes == BLOCKDEV_DETECT_ZEROES_OPTIONS_UNMAP &&
494 !(bdrv_flags & BDRV_O_UNMAP)) {
495 error_setg(errp, "setting detect-zeroes to unmap is not allowed "
496 "without setting discard operation to unmap");
497 goto early_err;
498 }
499
Kevin Wolf326642b2013-07-11 12:52:34 +0200500 /* init */
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200501 blk = blk_new_with_bs(qemu_opts_id(opts), errp);
Markus Armbruster26f54e92014-10-07 13:59:04 +0200502 if (!blk) {
503 goto early_err;
504 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +0200505 bs = blk_bs(blk);
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200506 bs->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
507 bs->read_only = ro;
508 bs->detect_zeroes = detect_zeroes;
Markus Armbruster666daa62010-06-02 18:48:27 +0200509
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200510 bdrv_set_on_error(bs, on_read_error, on_write_error);
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200511
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800512 /* disk I/O throttling */
Benoît Canetcc0681c2013-09-02 14:14:39 +0200513 if (throttle_enabled(&cfg)) {
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200514 bdrv_io_limits_enable(bs);
515 bdrv_set_io_limits(bs, &cfg);
Benoît Canetcc0681c2013-09-02 14:14:39 +0200516 }
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800517
Markus Armbrusterdd5b0d72010-05-11 15:36:46 +0200518 if (!file || !*file) {
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200519 if (has_driver_specific_opts) {
Kevin Wolfc2ad1b02013-03-18 16:40:51 +0100520 file = NULL;
521 } else {
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100522 QDECREF(bs_opts);
523 qemu_opts_del(opts);
Markus Armbruster18e46a02014-10-07 13:59:06 +0200524 return blk;
Kevin Wolfc2ad1b02013-03-18 16:40:51 +0100525 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200526 }
527 if (snapshot) {
528 /* always use cache=unsafe with snapshot */
529 bdrv_flags &= ~BDRV_O_CACHE_MASK;
530 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
531 }
532
Stefan Hajnoczifb0490f2011-11-17 13:40:32 +0000533 if (copy_on_read) {
534 bdrv_flags |= BDRV_O_COPY_ON_READ;
535 }
536
Benoît Caneted9d4202012-03-23 08:36:50 +0100537 if (runstate_check(RUN_STATE_INMIGRATE)) {
538 bdrv_flags |= BDRV_O_INCOMING;
539 }
540
Markus Armbruster666daa62010-06-02 18:48:27 +0200541 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
542
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200543 QINCREF(bs_opts);
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200544 ret = bdrv_open(&bs, file, NULL, bs_opts, bdrv_flags, drv, &error);
Markus Armbrusterfa1d36d2014-10-07 13:59:13 +0200545 assert(bs == blk_bs(blk));
Kevin Wolf00063832013-03-15 10:35:07 +0100546
Markus Armbruster666daa62010-06-02 18:48:27 +0200547 if (ret < 0) {
Kevin Wolfb6810722013-09-20 11:33:11 +0200548 error_setg(errp, "could not open disk image %s: %s",
Markus Armbrusterd3aeb1b2014-10-07 13:59:21 +0200549 file ?: blk_name(blk), error_get_pretty(error));
Kevin Wolfb6810722013-09-20 11:33:11 +0200550 error_free(error);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100551 goto err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200552 }
553
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200554 if (bdrv_key_required(bs)) {
Markus Armbruster666daa62010-06-02 18:48:27 +0200555 autostart = 0;
Markus Armbrustera0f1eab2014-09-12 21:26:21 +0200556 }
Kevin Wolf00063832013-03-15 10:35:07 +0100557
Kevin Wolf74fe54f2013-07-09 11:09:02 +0200558 QDECREF(bs_opts);
Kevin Wolf00063832013-03-15 10:35:07 +0100559 qemu_opts_del(opts);
560
Markus Armbruster18e46a02014-10-07 13:59:06 +0200561 return blk;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100562
563err:
Markus Armbruster26f54e92014-10-07 13:59:04 +0200564 blk_unref(blk);
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100565early_err:
Stefan Hajnocziec9c10d2013-10-30 14:54:30 +0100566 qemu_opts_del(opts);
Markus Armbruster6376f952014-05-28 11:17:01 +0200567err_no_opts:
568 QDECREF(bs_opts);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100569 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200570}
571
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200572static void qemu_opt_rename(QemuOpts *opts, const char *from, const char *to,
573 Error **errp)
Kevin Wolf57975222013-07-17 14:41:54 +0200574{
575 const char *value;
576
577 value = qemu_opt_get(opts, from);
578 if (value) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200579 if (qemu_opt_find(opts, to)) {
580 error_setg(errp, "'%s' and its alias '%s' can't be used at the "
581 "same time", to, from);
582 return;
583 }
Jun Li20d6cd42014-09-24 13:45:27 +0800584 }
585
586 /* rename all items in opts */
587 while ((value = qemu_opt_get(opts, from))) {
Kevin Wolf57975222013-07-17 14:41:54 +0200588 qemu_opt_set(opts, to, value);
589 qemu_opt_unset(opts, from);
590 }
591}
592
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200593QemuOptsList qemu_legacy_drive_opts = {
594 .name = "drive",
595 .head = QTAILQ_HEAD_INITIALIZER(qemu_legacy_drive_opts.head),
596 .desc = {
597 {
Kevin Wolf87a899c2013-09-10 15:48:13 +0200598 .name = "bus",
599 .type = QEMU_OPT_NUMBER,
600 .help = "bus number",
601 },{
602 .name = "unit",
603 .type = QEMU_OPT_NUMBER,
604 .help = "unit number (i.e. lun for scsi)",
605 },{
606 .name = "index",
607 .type = QEMU_OPT_NUMBER,
608 .help = "index number",
609 },{
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200610 .name = "media",
611 .type = QEMU_OPT_STRING,
612 .help = "media type (disk, cdrom)",
Kevin Wolf593d4642013-08-28 17:24:51 +0200613 },{
614 .name = "if",
615 .type = QEMU_OPT_STRING,
616 .help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
Kevin Wolfb41a7332013-09-09 16:49:49 +0200617 },{
618 .name = "cyls",
619 .type = QEMU_OPT_NUMBER,
620 .help = "number of cylinders (ide disk geometry)",
621 },{
622 .name = "heads",
623 .type = QEMU_OPT_NUMBER,
624 .help = "number of heads (ide disk geometry)",
625 },{
626 .name = "secs",
627 .type = QEMU_OPT_NUMBER,
628 .help = "number of sectors (ide disk geometry)",
629 },{
630 .name = "trans",
631 .type = QEMU_OPT_STRING,
632 .help = "chs translation (auto, lba, none)",
Kevin Wolf26929292013-09-09 17:01:03 +0200633 },{
634 .name = "boot",
635 .type = QEMU_OPT_BOOL,
636 .help = "(deprecated, ignored)",
Kevin Wolf394c7d42013-09-13 14:09:17 +0200637 },{
638 .name = "addr",
639 .type = QEMU_OPT_STRING,
640 .help = "pci address (virtio only)",
Max Reitzd095b462013-12-20 19:28:14 +0100641 },{
Kevin Wolfbcf83152014-06-06 15:21:48 +0200642 .name = "serial",
643 .type = QEMU_OPT_STRING,
644 .help = "disk serial number",
645 },{
Max Reitzd095b462013-12-20 19:28:14 +0100646 .name = "file",
647 .type = QEMU_OPT_STRING,
648 .help = "file name",
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200649 },
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200650
651 /* Options that are passed on, but have special semantics with -drive */
652 {
653 .name = "read-only",
654 .type = QEMU_OPT_BOOL,
655 .help = "open drive file as read-only",
656 },{
Kevin Wolfee13ed12014-02-09 09:52:32 +0100657 .name = "rerror",
658 .type = QEMU_OPT_STRING,
659 .help = "read error action",
660 },{
661 .name = "werror",
662 .type = QEMU_OPT_STRING,
663 .help = "write error action",
664 },{
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200665 .name = "copy-on-read",
666 .type = QEMU_OPT_BOOL,
667 .help = "copy read data from backing file into image file",
668 },
669
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200670 { /* end of list */ }
671 },
672};
673
Markus Armbruster60e19e02014-06-06 14:50:58 +0200674DriveInfo *drive_new(QemuOpts *all_opts, BlockInterfaceType block_default_type)
Kevin Wolf57975222013-07-17 14:41:54 +0200675{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200676 const char *value;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200677 BlockBackend *blk;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200678 DriveInfo *dinfo = NULL;
Kevin Wolff298d072013-09-10 12:01:20 +0200679 QDict *bs_opts;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200680 QemuOpts *legacy_opts;
681 DriveMediaType media = MEDIA_DISK;
Kevin Wolf593d4642013-08-28 17:24:51 +0200682 BlockInterfaceType type;
Kevin Wolfb41a7332013-09-09 16:49:49 +0200683 int cyls, heads, secs, translation;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200684 int max_devs, bus_id, unit_id, index;
Kevin Wolf394c7d42013-09-13 14:09:17 +0200685 const char *devaddr;
Kevin Wolfee13ed12014-02-09 09:52:32 +0100686 const char *werror, *rerror;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800687 bool read_only = false;
688 bool copy_on_read;
Kevin Wolfbcf83152014-06-06 15:21:48 +0200689 const char *serial;
Max Reitzd095b462013-12-20 19:28:14 +0100690 const char *filename;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200691 Error *local_err = NULL;
Kevin Wolf247147f2014-09-24 16:37:14 +0200692 int i;
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200693
Kevin Wolf57975222013-07-17 14:41:54 +0200694 /* Change legacy command line options into QMP ones */
Kevin Wolf247147f2014-09-24 16:37:14 +0200695 static const struct {
696 const char *from;
697 const char *to;
698 } opt_renames[] = {
699 { "iops", "throttling.iops-total" },
700 { "iops_rd", "throttling.iops-read" },
701 { "iops_wr", "throttling.iops-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200702
Kevin Wolf247147f2014-09-24 16:37:14 +0200703 { "bps", "throttling.bps-total" },
704 { "bps_rd", "throttling.bps-read" },
705 { "bps_wr", "throttling.bps-write" },
Kevin Wolf57975222013-07-17 14:41:54 +0200706
Kevin Wolf247147f2014-09-24 16:37:14 +0200707 { "iops_max", "throttling.iops-total-max" },
708 { "iops_rd_max", "throttling.iops-read-max" },
709 { "iops_wr_max", "throttling.iops-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200710
Kevin Wolf247147f2014-09-24 16:37:14 +0200711 { "bps_max", "throttling.bps-total-max" },
712 { "bps_rd_max", "throttling.bps-read-max" },
713 { "bps_wr_max", "throttling.bps-write-max" },
Benoît Canet3e9fab62013-09-02 14:14:40 +0200714
Kevin Wolf247147f2014-09-24 16:37:14 +0200715 { "iops_size", "throttling.iops-size" },
Benoît Canet2024c1d2013-09-02 14:14:41 +0200716
Kevin Wolf247147f2014-09-24 16:37:14 +0200717 { "readonly", "read-only" },
718 };
719
720 for (i = 0; i < ARRAY_SIZE(opt_renames); i++) {
Kevin Wolf5abbf0e2014-09-18 11:48:34 +0200721 qemu_opt_rename(all_opts, opt_renames[i].from, opt_renames[i].to,
722 &local_err);
723 if (local_err) {
724 error_report("%s", error_get_pretty(local_err));
725 error_free(local_err);
726 return NULL;
727 }
Kevin Wolf247147f2014-09-24 16:37:14 +0200728 }
Kevin Wolf0f227a92013-07-19 20:07:29 +0200729
Kevin Wolf29c4e2b2013-07-18 16:31:25 +0200730 value = qemu_opt_get(all_opts, "cache");
731 if (value) {
732 int flags = 0;
733
734 if (bdrv_parse_cache_flags(value, &flags) != 0) {
735 error_report("invalid cache option");
736 return NULL;
737 }
738
739 /* Specific options take precedence */
740 if (!qemu_opt_get(all_opts, "cache.writeback")) {
741 qemu_opt_set_bool(all_opts, "cache.writeback",
742 !!(flags & BDRV_O_CACHE_WB));
743 }
744 if (!qemu_opt_get(all_opts, "cache.direct")) {
745 qemu_opt_set_bool(all_opts, "cache.direct",
746 !!(flags & BDRV_O_NOCACHE));
747 }
748 if (!qemu_opt_get(all_opts, "cache.no-flush")) {
749 qemu_opt_set_bool(all_opts, "cache.no-flush",
750 !!(flags & BDRV_O_NO_FLUSH));
751 }
752 qemu_opt_unset(all_opts, "cache");
753 }
754
Kevin Wolff298d072013-09-10 12:01:20 +0200755 /* Get a QDict for processing the options */
756 bs_opts = qdict_new();
757 qemu_opts_to_qdict(all_opts, bs_opts);
758
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800759 legacy_opts = qemu_opts_create(&qemu_legacy_drive_opts, NULL, 0,
760 &error_abort);
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200761 qemu_opts_absorb_qdict(legacy_opts, bs_opts, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +0100762 if (local_err) {
Markus Armbrustere8817e72014-05-16 11:00:08 +0200763 error_report("%s", error_get_pretty(local_err));
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200764 error_free(local_err);
765 goto fail;
766 }
767
Kevin Wolf26929292013-09-09 17:01:03 +0200768 /* Deprecated option boot=[on|off] */
769 if (qemu_opt_get(legacy_opts, "boot") != NULL) {
770 fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
771 "ignored. Future versions will reject this parameter. Please "
772 "update your scripts.\n");
773 }
774
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200775 /* Media type */
776 value = qemu_opt_get(legacy_opts, "media");
777 if (value) {
778 if (!strcmp(value, "disk")) {
779 media = MEDIA_DISK;
780 } else if (!strcmp(value, "cdrom")) {
781 media = MEDIA_CDROM;
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800782 read_only = true;
Kevin Wolf33cb7dc2013-08-28 17:00:13 +0200783 } else {
784 error_report("'%s' invalid media", value);
785 goto fail;
786 }
787 }
788
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200789 /* copy-on-read is disabled with a warning for read-only devices */
Fam Zhenga7fdbcf2013-10-15 17:45:50 +0800790 read_only |= qemu_opt_get_bool(legacy_opts, "read-only", false);
Kevin Wolf0ebd24e2013-09-19 15:12:18 +0200791 copy_on_read = qemu_opt_get_bool(legacy_opts, "copy-on-read", false);
792
793 if (read_only && copy_on_read) {
794 error_report("warning: disabling copy-on-read on read-only drive");
795 copy_on_read = false;
796 }
797
798 qdict_put(bs_opts, "read-only",
799 qstring_from_str(read_only ? "on" : "off"));
800 qdict_put(bs_opts, "copy-on-read",
801 qstring_from_str(copy_on_read ? "on" :"off"));
802
Kevin Wolf593d4642013-08-28 17:24:51 +0200803 /* Controller type */
804 value = qemu_opt_get(legacy_opts, "if");
805 if (value) {
806 for (type = 0;
807 type < IF_COUNT && strcmp(value, if_name[type]);
808 type++) {
809 }
810 if (type == IF_COUNT) {
811 error_report("unsupported bus type '%s'", value);
812 goto fail;
813 }
814 } else {
815 type = block_default_type;
816 }
817
Kevin Wolfb41a7332013-09-09 16:49:49 +0200818 /* Geometry */
819 cyls = qemu_opt_get_number(legacy_opts, "cyls", 0);
820 heads = qemu_opt_get_number(legacy_opts, "heads", 0);
821 secs = qemu_opt_get_number(legacy_opts, "secs", 0);
822
823 if (cyls || heads || secs) {
824 if (cyls < 1) {
825 error_report("invalid physical cyls number");
826 goto fail;
827 }
828 if (heads < 1) {
829 error_report("invalid physical heads number");
830 goto fail;
831 }
832 if (secs < 1) {
833 error_report("invalid physical secs number");
834 goto fail;
835 }
836 }
837
838 translation = BIOS_ATA_TRANSLATION_AUTO;
839 value = qemu_opt_get(legacy_opts, "trans");
840 if (value != NULL) {
841 if (!cyls) {
842 error_report("'%s' trans must be used with cyls, heads and secs",
843 value);
844 goto fail;
845 }
846 if (!strcmp(value, "none")) {
847 translation = BIOS_ATA_TRANSLATION_NONE;
848 } else if (!strcmp(value, "lba")) {
849 translation = BIOS_ATA_TRANSLATION_LBA;
Paolo Bonzinif31c41f2014-02-08 11:01:54 +0100850 } else if (!strcmp(value, "large")) {
851 translation = BIOS_ATA_TRANSLATION_LARGE;
852 } else if (!strcmp(value, "rechs")) {
853 translation = BIOS_ATA_TRANSLATION_RECHS;
Kevin Wolfb41a7332013-09-09 16:49:49 +0200854 } else if (!strcmp(value, "auto")) {
855 translation = BIOS_ATA_TRANSLATION_AUTO;
856 } else {
857 error_report("'%s' invalid translation type", value);
858 goto fail;
859 }
860 }
861
862 if (media == MEDIA_CDROM) {
863 if (cyls || secs || heads) {
864 error_report("CHS can't be set with media=cdrom");
865 goto fail;
866 }
867 }
868
Kevin Wolf87a899c2013-09-10 15:48:13 +0200869 /* Device address specified by bus/unit or index.
870 * If none was specified, try to find the first free one. */
871 bus_id = qemu_opt_get_number(legacy_opts, "bus", 0);
872 unit_id = qemu_opt_get_number(legacy_opts, "unit", -1);
873 index = qemu_opt_get_number(legacy_opts, "index", -1);
874
875 max_devs = if_max_devs[type];
876
877 if (index != -1) {
878 if (bus_id != 0 || unit_id != -1) {
879 error_report("index cannot be used with bus and unit");
880 goto fail;
881 }
882 bus_id = drive_index_to_bus_id(type, index);
883 unit_id = drive_index_to_unit_id(type, index);
884 }
885
886 if (unit_id == -1) {
887 unit_id = 0;
888 while (drive_get(type, bus_id, unit_id) != NULL) {
889 unit_id++;
890 if (max_devs && unit_id >= max_devs) {
891 unit_id -= max_devs;
892 bus_id++;
893 }
894 }
895 }
896
897 if (max_devs && unit_id >= max_devs) {
898 error_report("unit %d too big (max is %d)", unit_id, max_devs - 1);
899 goto fail;
900 }
901
902 if (drive_get(type, bus_id, unit_id) != NULL) {
903 error_report("drive with bus=%d, unit=%d (index=%d) exists",
904 bus_id, unit_id, index);
905 goto fail;
906 }
907
Kevin Wolfbcf83152014-06-06 15:21:48 +0200908 /* Serial number */
909 serial = qemu_opt_get(legacy_opts, "serial");
910
Kevin Wolf87a899c2013-09-10 15:48:13 +0200911 /* no id supplied -> create one */
912 if (qemu_opts_id(all_opts) == NULL) {
913 char *new_id;
914 const char *mediastr = "";
915 if (type == IF_IDE || type == IF_SCSI) {
916 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
917 }
918 if (max_devs) {
919 new_id = g_strdup_printf("%s%i%s%i", if_name[type], bus_id,
920 mediastr, unit_id);
921 } else {
922 new_id = g_strdup_printf("%s%s%i", if_name[type],
923 mediastr, unit_id);
924 }
925 qdict_put(bs_opts, "id", qstring_from_str(new_id));
926 g_free(new_id);
927 }
928
Kevin Wolf394c7d42013-09-13 14:09:17 +0200929 /* Add virtio block device */
930 devaddr = qemu_opt_get(legacy_opts, "addr");
931 if (devaddr && type != IF_VIRTIO) {
932 error_report("addr is not supported by this bus type");
933 goto fail;
934 }
935
936 if (type == IF_VIRTIO) {
937 QemuOpts *devopts;
Peter Crosthwaite87ea75d2014-01-01 18:49:17 -0800938 devopts = qemu_opts_create(qemu_find_opts("device"), NULL, 0,
939 &error_abort);
Kevin Wolf394c7d42013-09-13 14:09:17 +0200940 if (arch_type == QEMU_ARCH_S390X) {
941 qemu_opt_set(devopts, "driver", "virtio-blk-s390");
942 } else {
943 qemu_opt_set(devopts, "driver", "virtio-blk-pci");
944 }
945 qemu_opt_set(devopts, "drive", qdict_get_str(bs_opts, "id"));
946 if (devaddr) {
947 qemu_opt_set(devopts, "addr", devaddr);
948 }
949 }
950
Max Reitzd095b462013-12-20 19:28:14 +0100951 filename = qemu_opt_get(legacy_opts, "file");
952
Kevin Wolfee13ed12014-02-09 09:52:32 +0100953 /* Check werror/rerror compatibility with if=... */
954 werror = qemu_opt_get(legacy_opts, "werror");
955 if (werror != NULL) {
956 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO &&
957 type != IF_NONE) {
958 error_report("werror is not supported by this bus type");
959 goto fail;
960 }
961 qdict_put(bs_opts, "werror", qstring_from_str(werror));
962 }
963
964 rerror = qemu_opt_get(legacy_opts, "rerror");
965 if (rerror != NULL) {
966 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI &&
967 type != IF_NONE) {
968 error_report("rerror is not supported by this bus type");
969 goto fail;
970 }
971 qdict_put(bs_opts, "rerror", qstring_from_str(rerror));
972 }
973
Kevin Wolf2d246f02013-09-18 15:14:47 +0200974 /* Actual block device init: Functionality shared with blockdev-add */
Markus Armbruster18e46a02014-10-07 13:59:06 +0200975 blk = blockdev_init(filename, bs_opts, &local_err);
Markus Armbruster3cb0e252014-05-28 11:17:02 +0200976 bs_opts = NULL;
Markus Armbruster18e46a02014-10-07 13:59:06 +0200977 if (!blk) {
Markus Armbruster84d18f02014-01-30 15:07:28 +0100978 if (local_err) {
Markus Armbrustere8817e72014-05-16 11:00:08 +0200979 error_report("%s", error_get_pretty(local_err));
Kevin Wolfb6810722013-09-20 11:33:11 +0200980 error_free(local_err);
981 }
Kevin Wolf2d246f02013-09-18 15:14:47 +0200982 goto fail;
Kevin Wolfb6810722013-09-20 11:33:11 +0200983 } else {
Markus Armbruster84d18f02014-01-30 15:07:28 +0100984 assert(!local_err);
Kevin Wolf2d246f02013-09-18 15:14:47 +0200985 }
986
Markus Armbruster26f8b3a2014-10-07 13:59:22 +0200987 /* Create legacy DriveInfo */
988 dinfo = g_malloc0(sizeof(*dinfo));
Kevin Wolff298d072013-09-10 12:01:20 +0200989 dinfo->opts = all_opts;
Kevin Wolf2d246f02013-09-18 15:14:47 +0200990
Kevin Wolfb41a7332013-09-09 16:49:49 +0200991 dinfo->cyls = cyls;
992 dinfo->heads = heads;
993 dinfo->secs = secs;
994 dinfo->trans = translation;
995
Kevin Wolfee13ed12014-02-09 09:52:32 +0100996 dinfo->type = type;
Kevin Wolf87a899c2013-09-10 15:48:13 +0200997 dinfo->bus = bus_id;
998 dinfo->unit = unit_id;
Kevin Wolf394c7d42013-09-13 14:09:17 +0200999 dinfo->devaddr = devaddr;
Kevin Wolfbcf83152014-06-06 15:21:48 +02001000 dinfo->serial = g_strdup(serial);
1001
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001002 blk_set_legacy_dinfo(blk, dinfo);
1003
Kevin Wolfe34ef042013-09-19 14:24:10 +02001004 switch(type) {
1005 case IF_IDE:
1006 case IF_SCSI:
1007 case IF_XEN:
1008 case IF_NONE:
1009 dinfo->media_cd = media == MEDIA_CDROM;
1010 break;
1011 default:
1012 break;
1013 }
1014
Kevin Wolf2d246f02013-09-18 15:14:47 +02001015fail:
Kevin Wolf33cb7dc2013-08-28 17:00:13 +02001016 qemu_opts_del(legacy_opts);
Markus Armbruster3cb0e252014-05-28 11:17:02 +02001017 QDECREF(bs_opts);
Kevin Wolf2d246f02013-09-18 15:14:47 +02001018 return dinfo;
Kevin Wolf57975222013-07-17 14:41:54 +02001019}
1020
Markus Armbruster666daa62010-06-02 18:48:27 +02001021void do_commit(Monitor *mon, const QDict *qdict)
1022{
Markus Armbruster666daa62010-06-02 18:48:27 +02001023 const char *device = qdict_get_str(qdict, "device");
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001024 BlockDriverState *bs;
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001025 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +02001026
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001027 if (!strcmp(device, "all")) {
Stefan Hajnoczie8877492012-03-05 18:10:11 +00001028 ret = bdrv_commit_all();
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001029 } else {
1030 bs = bdrv_find(device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001031 if (!bs) {
Jeff Cody58513bd2013-01-18 12:45:35 -05001032 monitor_printf(mon, "Device '%s' not found\n", device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +02001033 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +02001034 }
Stefan Hajnoczi2d3735d2012-01-18 14:40:41 +00001035 ret = bdrv_commit(bs);
Jeff Cody58513bd2013-01-18 12:45:35 -05001036 }
1037 if (ret < 0) {
1038 monitor_printf(mon, "'commit' error for '%s': %s\n", device,
1039 strerror(-ret));
Markus Armbruster666daa62010-06-02 18:48:27 +02001040 }
1041}
1042
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001043static void blockdev_do_action(int kind, void *data, Error **errp)
1044{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001045 TransactionAction action;
1046 TransactionActionList list;
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001047
1048 action.kind = kind;
1049 action.data = data;
1050 list.value = &action;
1051 list.next = NULL;
1052 qmp_transaction(&list, errp);
1053}
1054
Benoît Canet0901f672014-01-23 21:31:38 +01001055void qmp_blockdev_snapshot_sync(bool has_device, const char *device,
1056 bool has_node_name, const char *node_name,
1057 const char *snapshot_file,
1058 bool has_snapshot_node_name,
1059 const char *snapshot_node_name,
Luiz Capitulino6106e242011-11-25 16:15:19 -02001060 bool has_format, const char *format,
Benoît Canet0901f672014-01-23 21:31:38 +01001061 bool has_mode, NewImageMode mode, Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +01001062{
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001063 BlockdevSnapshot snapshot = {
Benoît Canet0901f672014-01-23 21:31:38 +01001064 .has_device = has_device,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001065 .device = (char *) device,
Benoît Canet0901f672014-01-23 21:31:38 +01001066 .has_node_name = has_node_name,
1067 .node_name = (char *) node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001068 .snapshot_file = (char *) snapshot_file,
Benoît Canet0901f672014-01-23 21:31:38 +01001069 .has_snapshot_node_name = has_snapshot_node_name,
1070 .snapshot_node_name = (char *) snapshot_node_name,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +01001071 .has_format = has_format,
1072 .format = (char *) format,
1073 .has_mode = has_mode,
1074 .mode = mode,
1075 };
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001076 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC,
1077 &snapshot, errp);
Jes Sorensenf8882562010-12-16 13:52:16 +01001078}
1079
Wenchao Xiaf323bc92013-09-11 14:04:35 +08001080void qmp_blockdev_snapshot_internal_sync(const char *device,
1081 const char *name,
1082 Error **errp)
1083{
1084 BlockdevSnapshotInternal snapshot = {
1085 .device = (char *) device,
1086 .name = (char *) name
1087 };
1088
1089 blockdev_do_action(TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC,
1090 &snapshot, errp);
1091}
1092
Wenchao Xia44e3e052013-09-11 14:04:36 +08001093SnapshotInfo *qmp_blockdev_snapshot_delete_internal_sync(const char *device,
1094 bool has_id,
1095 const char *id,
1096 bool has_name,
1097 const char *name,
1098 Error **errp)
1099{
1100 BlockDriverState *bs = bdrv_find(device);
1101 QEMUSnapshotInfo sn;
1102 Error *local_err = NULL;
1103 SnapshotInfo *info = NULL;
1104 int ret;
1105
1106 if (!bs) {
1107 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1108 return NULL;
1109 }
1110
1111 if (!has_id) {
1112 id = NULL;
1113 }
1114
1115 if (!has_name) {
1116 name = NULL;
1117 }
1118
1119 if (!id && !name) {
1120 error_setg(errp, "Name or id must be provided");
1121 return NULL;
1122 }
1123
1124 ret = bdrv_snapshot_find_by_id_and_name(bs, id, name, &sn, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001125 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001126 error_propagate(errp, local_err);
1127 return NULL;
1128 }
1129 if (!ret) {
1130 error_setg(errp,
1131 "Snapshot with id '%s' and name '%s' does not exist on "
1132 "device '%s'",
1133 STR_OR_NULL(id), STR_OR_NULL(name), device);
1134 return NULL;
1135 }
1136
1137 bdrv_snapshot_delete(bs, id, name, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001138 if (local_err) {
Wenchao Xia44e3e052013-09-11 14:04:36 +08001139 error_propagate(errp, local_err);
1140 return NULL;
1141 }
1142
Markus Armbruster5839e532014-08-19 10:31:08 +02001143 info = g_new0(SnapshotInfo, 1);
Wenchao Xia44e3e052013-09-11 14:04:36 +08001144 info->id = g_strdup(sn.id_str);
1145 info->name = g_strdup(sn.name);
1146 info->date_nsec = sn.date_nsec;
1147 info->date_sec = sn.date_sec;
1148 info->vm_state_size = sn.vm_state_size;
1149 info->vm_clock_nsec = sn.vm_clock_nsec % 1000000000;
1150 info->vm_clock_sec = sn.vm_clock_nsec / 1000000000;
1151
1152 return info;
1153}
Jeff Cody8802d1f2012-02-28 15:54:06 -05001154
1155/* New and old BlockDriverState structs for group snapshots */
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001156
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001157typedef struct BlkTransactionState BlkTransactionState;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001158
1159/* Only prepare() may fail. In a single transaction, only one of commit() or
1160 abort() will be called, clean() will always be called if it present. */
1161typedef struct BdrvActionOps {
1162 /* Size of state struct, in bytes. */
1163 size_t instance_size;
1164 /* Prepare the work, must NOT be NULL. */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001165 void (*prepare)(BlkTransactionState *common, Error **errp);
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02001166 /* Commit the changes, can be NULL. */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001167 void (*commit)(BlkTransactionState *common);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001168 /* Abort the changes on fail, can be NULL. */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001169 void (*abort)(BlkTransactionState *common);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001170 /* Clean up resource in the end, can be NULL. */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001171 void (*clean)(BlkTransactionState *common);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001172} BdrvActionOps;
1173
1174/*
1175 * This structure must be arranged as first member in child type, assuming
1176 * that compiler will also arrange it to the same address with parent instance.
1177 * Later it will be used in free().
1178 */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001179struct BlkTransactionState {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001180 TransactionAction *action;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001181 const BdrvActionOps *ops;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001182 QSIMPLEQ_ENTRY(BlkTransactionState) entry;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001183};
1184
Wenchao Xiabbe86012013-09-11 14:04:34 +08001185/* internal snapshot private data */
1186typedef struct InternalSnapshotState {
1187 BlkTransactionState common;
1188 BlockDriverState *bs;
1189 QEMUSnapshotInfo sn;
1190} InternalSnapshotState;
1191
1192static void internal_snapshot_prepare(BlkTransactionState *common,
1193 Error **errp)
1194{
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001195 Error *local_err = NULL;
Wenchao Xiabbe86012013-09-11 14:04:34 +08001196 const char *device;
1197 const char *name;
1198 BlockDriverState *bs;
1199 QEMUSnapshotInfo old_sn, *sn;
1200 bool ret;
1201 qemu_timeval tv;
1202 BlockdevSnapshotInternal *internal;
1203 InternalSnapshotState *state;
1204 int ret1;
1205
1206 g_assert(common->action->kind ==
1207 TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC);
1208 internal = common->action->blockdev_snapshot_internal_sync;
1209 state = DO_UPCAST(InternalSnapshotState, common, common);
1210
1211 /* 1. parse input */
1212 device = internal->device;
1213 name = internal->name;
1214
1215 /* 2. check for validation */
1216 bs = bdrv_find(device);
1217 if (!bs) {
1218 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1219 return;
1220 }
1221
1222 if (!bdrv_is_inserted(bs)) {
1223 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1224 return;
1225 }
1226
1227 if (bdrv_is_read_only(bs)) {
1228 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1229 return;
1230 }
1231
1232 if (!bdrv_can_snapshot(bs)) {
1233 error_set(errp, QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED,
1234 bs->drv->format_name, device, "internal snapshot");
1235 return;
1236 }
1237
1238 if (!strlen(name)) {
1239 error_setg(errp, "Name is empty");
1240 return;
1241 }
1242
1243 /* check whether a snapshot with name exist */
Markus Armbrusterf70edf92014-04-25 16:50:34 +02001244 ret = bdrv_snapshot_find_by_id_and_name(bs, NULL, name, &old_sn,
1245 &local_err);
1246 if (local_err) {
1247 error_propagate(errp, local_err);
Wenchao Xiabbe86012013-09-11 14:04:34 +08001248 return;
1249 } else if (ret) {
1250 error_setg(errp,
1251 "Snapshot with name '%s' already exists on device '%s'",
1252 name, device);
1253 return;
1254 }
1255
1256 /* 3. take the snapshot */
1257 sn = &state->sn;
1258 pstrcpy(sn->name, sizeof(sn->name), name);
1259 qemu_gettimeofday(&tv);
1260 sn->date_sec = tv.tv_sec;
1261 sn->date_nsec = tv.tv_usec * 1000;
1262 sn->vm_clock_nsec = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
1263
1264 ret1 = bdrv_snapshot_create(bs, sn);
1265 if (ret1 < 0) {
1266 error_setg_errno(errp, -ret1,
1267 "Failed to create snapshot '%s' on device '%s'",
1268 name, device);
1269 return;
1270 }
1271
1272 /* 4. succeed, mark a snapshot is created */
1273 state->bs = bs;
1274}
1275
1276static void internal_snapshot_abort(BlkTransactionState *common)
1277{
1278 InternalSnapshotState *state =
1279 DO_UPCAST(InternalSnapshotState, common, common);
1280 BlockDriverState *bs = state->bs;
1281 QEMUSnapshotInfo *sn = &state->sn;
1282 Error *local_error = NULL;
1283
1284 if (!bs) {
1285 return;
1286 }
1287
1288 if (bdrv_snapshot_delete(bs, sn->id_str, sn->name, &local_error) < 0) {
1289 error_report("Failed to delete snapshot with id '%s' and name '%s' on "
1290 "device '%s' in abort: %s",
1291 sn->id_str,
1292 sn->name,
1293 bdrv_get_device_name(bs),
1294 error_get_pretty(local_error));
1295 error_free(local_error);
1296 }
1297}
1298
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001299/* external snapshot private data */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001300typedef struct ExternalSnapshotState {
1301 BlkTransactionState common;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001302 BlockDriverState *old_bs;
1303 BlockDriverState *new_bs;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001304} ExternalSnapshotState;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001305
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001306static void external_snapshot_prepare(BlkTransactionState *common,
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001307 Error **errp)
1308{
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001309 BlockDriver *drv;
1310 int flags, ret;
Benoît Canet0901f672014-01-23 21:31:38 +01001311 QDict *options = NULL;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001312 Error *local_err = NULL;
Benoît Canet0901f672014-01-23 21:31:38 +01001313 bool has_device = false;
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001314 const char *device;
Benoît Canet0901f672014-01-23 21:31:38 +01001315 bool has_node_name = false;
1316 const char *node_name;
1317 bool has_snapshot_node_name = false;
1318 const char *snapshot_node_name;
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001319 const char *new_image_file;
1320 const char *format = "qcow2";
1321 enum NewImageMode mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001322 ExternalSnapshotState *state =
1323 DO_UPCAST(ExternalSnapshotState, common, common);
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001324 TransactionAction *action = common->action;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001325
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001326 /* get parameters */
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001327 g_assert(action->kind == TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC);
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001328
Benoît Canet0901f672014-01-23 21:31:38 +01001329 has_device = action->blockdev_snapshot_sync->has_device;
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001330 device = action->blockdev_snapshot_sync->device;
Benoît Canet0901f672014-01-23 21:31:38 +01001331 has_node_name = action->blockdev_snapshot_sync->has_node_name;
1332 node_name = action->blockdev_snapshot_sync->node_name;
1333 has_snapshot_node_name =
1334 action->blockdev_snapshot_sync->has_snapshot_node_name;
1335 snapshot_node_name = action->blockdev_snapshot_sync->snapshot_node_name;
1336
Wenchao Xiae2a31e82013-05-08 18:25:13 +08001337 new_image_file = action->blockdev_snapshot_sync->snapshot_file;
1338 if (action->blockdev_snapshot_sync->has_format) {
1339 format = action->blockdev_snapshot_sync->format;
1340 }
1341 if (action->blockdev_snapshot_sync->has_mode) {
1342 mode = action->blockdev_snapshot_sync->mode;
1343 }
1344
1345 /* start processing */
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001346 drv = bdrv_find_format(format);
1347 if (!drv) {
1348 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1349 return;
1350 }
1351
Benoît Canet0901f672014-01-23 21:31:38 +01001352 state->old_bs = bdrv_lookup_bs(has_device ? device : NULL,
1353 has_node_name ? node_name : NULL,
1354 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001355 if (local_err) {
Benoît Canet0901f672014-01-23 21:31:38 +01001356 error_propagate(errp, local_err);
1357 return;
1358 }
1359
1360 if (has_node_name && !has_snapshot_node_name) {
1361 error_setg(errp, "New snapshot node name missing");
1362 return;
1363 }
1364
1365 if (has_snapshot_node_name && bdrv_find_node(snapshot_node_name)) {
1366 error_setg(errp, "New snapshot node name already existing");
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001367 return;
1368 }
1369
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001370 if (!bdrv_is_inserted(state->old_bs)) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001371 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1372 return;
1373 }
1374
Fam Zheng3718d8a2014-05-23 21:29:43 +08001375 if (bdrv_op_is_blocked(state->old_bs,
1376 BLOCK_OP_TYPE_EXTERNAL_SNAPSHOT, errp)) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001377 return;
1378 }
1379
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001380 if (!bdrv_is_read_only(state->old_bs)) {
1381 if (bdrv_flush(state->old_bs)) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001382 error_set(errp, QERR_IO_ERROR);
1383 return;
1384 }
1385 }
1386
Benoît Canet212a5a82014-01-23 21:31:36 +01001387 if (!bdrv_is_first_non_filter(state->old_bs)) {
Benoît Canetf6186f42013-10-02 14:33:48 +02001388 error_set(errp, QERR_FEATURE_DISABLED, "snapshot");
1389 return;
1390 }
1391
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001392 flags = state->old_bs->open_flags;
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001393
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001394 /* create new image w/backing file */
1395 if (mode != NEW_IMAGE_MODE_EXISTING) {
1396 bdrv_img_create(new_image_file, format,
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001397 state->old_bs->filename,
1398 state->old_bs->drv->format_name,
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001399 NULL, -1, flags, &local_err, false);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001400 if (local_err) {
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001401 error_propagate(errp, local_err);
1402 return;
1403 }
1404 }
1405
Benoît Canet0901f672014-01-23 21:31:38 +01001406 if (has_snapshot_node_name) {
1407 options = qdict_new();
1408 qdict_put(options, "node-name",
1409 qstring_from_str(snapshot_node_name));
1410 }
1411
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001412 /* TODO Inherit bs->options or only take explicit options with an
1413 * extended QMP command? */
Max Reitzf67503e2014-02-18 18:33:05 +01001414 assert(state->new_bs == NULL);
Max Reitzddf56362014-02-18 18:33:06 +01001415 ret = bdrv_open(&state->new_bs, new_image_file, NULL, options,
Max Reitz34b5d2c2013-09-05 14:45:29 +02001416 flags | BDRV_O_NO_BACKING, drv, &local_err);
Max Reitzf67503e2014-02-18 18:33:05 +01001417 /* We will manually add the backing_hd field to the bs later */
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001418 if (ret != 0) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02001419 error_propagate(errp, local_err);
Wenchao Xia9b9877e2013-05-08 18:25:12 +08001420 }
1421}
1422
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001423static void external_snapshot_commit(BlkTransactionState *common)
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001424{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001425 ExternalSnapshotState *state =
1426 DO_UPCAST(ExternalSnapshotState, common, common);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001427
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001428 /* This removes our old bs and adds the new bs */
1429 bdrv_append(state->new_bs, state->old_bs);
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001430 /* We don't need (or want) to use the transactional
1431 * bdrv_reopen_multiple() across all the entries at once, because we
1432 * don't want to abort all of them if one of them fails the reopen */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001433 bdrv_reopen(state->new_bs, state->new_bs->open_flags & ~BDRV_O_RDWR,
Wenchao Xia3b0047e2013-05-08 18:25:14 +08001434 NULL);
1435}
1436
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001437static void external_snapshot_abort(BlkTransactionState *common)
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001438{
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001439 ExternalSnapshotState *state =
1440 DO_UPCAST(ExternalSnapshotState, common, common);
1441 if (state->new_bs) {
Fam Zheng4f6fd342013-08-23 09:14:47 +08001442 bdrv_unref(state->new_bs);
Wenchao Xia96b86bf2013-05-08 18:25:15 +08001443 }
1444}
1445
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001446typedef struct DriveBackupState {
1447 BlkTransactionState common;
1448 BlockDriverState *bs;
1449 BlockJob *job;
1450} DriveBackupState;
1451
1452static void drive_backup_prepare(BlkTransactionState *common, Error **errp)
1453{
1454 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1455 DriveBackup *backup;
1456 Error *local_err = NULL;
1457
1458 assert(common->action->kind == TRANSACTION_ACTION_KIND_DRIVE_BACKUP);
1459 backup = common->action->drive_backup;
1460
1461 qmp_drive_backup(backup->device, backup->target,
1462 backup->has_format, backup->format,
Stefan Hajnoczib53169e2013-06-26 14:11:57 +02001463 backup->sync,
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001464 backup->has_mode, backup->mode,
1465 backup->has_speed, backup->speed,
1466 backup->has_on_source_error, backup->on_source_error,
1467 backup->has_on_target_error, backup->on_target_error,
1468 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001469 if (local_err) {
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001470 error_propagate(errp, local_err);
1471 state->bs = NULL;
1472 state->job = NULL;
1473 return;
1474 }
1475
1476 state->bs = bdrv_find(backup->device);
1477 state->job = state->bs->job;
1478}
1479
1480static void drive_backup_abort(BlkTransactionState *common)
1481{
1482 DriveBackupState *state = DO_UPCAST(DriveBackupState, common, common);
1483 BlockDriverState *bs = state->bs;
1484
1485 /* Only cancel if it's the job we started */
1486 if (bs && bs->job && bs->job == state->job) {
1487 block_job_cancel_sync(bs->job);
1488 }
1489}
1490
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02001491static void abort_prepare(BlkTransactionState *common, Error **errp)
1492{
1493 error_setg(errp, "Transaction aborted using Abort action");
1494}
1495
1496static void abort_commit(BlkTransactionState *common)
1497{
Stefan Weildfc6f862013-07-25 18:21:28 +02001498 g_assert_not_reached(); /* this action never succeeds */
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02001499}
1500
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001501static const BdrvActionOps actions[] = {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001502 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC] = {
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001503 .instance_size = sizeof(ExternalSnapshotState),
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001504 .prepare = external_snapshot_prepare,
1505 .commit = external_snapshot_commit,
1506 .abort = external_snapshot_abort,
1507 },
Stefan Hajnoczi3037f362013-06-24 17:13:17 +02001508 [TRANSACTION_ACTION_KIND_DRIVE_BACKUP] = {
1509 .instance_size = sizeof(DriveBackupState),
1510 .prepare = drive_backup_prepare,
1511 .abort = drive_backup_abort,
1512 },
Stefan Hajnoczi78b18b72013-06-24 17:13:18 +02001513 [TRANSACTION_ACTION_KIND_ABORT] = {
1514 .instance_size = sizeof(BlkTransactionState),
1515 .prepare = abort_prepare,
1516 .commit = abort_commit,
1517 },
Wenchao Xiabbe86012013-09-11 14:04:34 +08001518 [TRANSACTION_ACTION_KIND_BLOCKDEV_SNAPSHOT_INTERNAL_SYNC] = {
1519 .instance_size = sizeof(InternalSnapshotState),
1520 .prepare = internal_snapshot_prepare,
1521 .abort = internal_snapshot_abort,
1522 },
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001523};
1524
Jeff Cody8802d1f2012-02-28 15:54:06 -05001525/*
1526 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
1527 * then we do not pivot any of the devices in the group, and abandon the
1528 * snapshots
1529 */
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001530void qmp_transaction(TransactionActionList *dev_list, Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -05001531{
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001532 TransactionActionList *dev_entry = dev_list;
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001533 BlkTransactionState *state, *next;
Luiz Capitulino43e17042012-11-30 10:52:07 -02001534 Error *local_err = NULL;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001535
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001536 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionState) snap_bdrv_states;
Jeff Cody8802d1f2012-02-28 15:54:06 -05001537 QSIMPLEQ_INIT(&snap_bdrv_states);
1538
1539 /* drain all i/o before any snapshots */
1540 bdrv_drain_all();
1541
1542 /* We don't do anything in this loop that commits us to the snapshot */
1543 while (NULL != dev_entry) {
Kevin Wolfc8a83e82013-05-13 10:43:43 +02001544 TransactionAction *dev_info = NULL;
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001545 const BdrvActionOps *ops;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01001546
Jeff Cody8802d1f2012-02-28 15:54:06 -05001547 dev_info = dev_entry->value;
1548 dev_entry = dev_entry->next;
1549
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001550 assert(dev_info->kind < ARRAY_SIZE(actions));
1551
1552 ops = &actions[dev_info->kind];
Max Reitzaa3fe712013-09-12 14:57:27 +02001553 assert(ops->instance_size > 0);
1554
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001555 state = g_malloc0(ops->instance_size);
1556 state->ops = ops;
1557 state->action = dev_info;
1558 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, state, entry);
Jeff Cody8802d1f2012-02-28 15:54:06 -05001559
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001560 state->ops->prepare(state, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001561 if (local_err) {
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001562 error_propagate(errp, local_err);
1563 goto delete_and_fail;
Paolo Bonzini52e7c242012-03-06 18:55:57 +01001564 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05001565 }
1566
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001567 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
Stefan Hajnoczif9ea81e2013-06-24 17:13:16 +02001568 if (state->ops->commit) {
1569 state->ops->commit(state);
1570 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05001571 }
1572
1573 /* success */
1574 goto exit;
1575
1576delete_and_fail:
1577 /*
1578 * failure, and it is all-or-none; abandon each new bs, and keep using
1579 * the original bs for all images
1580 */
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001581 QSIMPLEQ_FOREACH(state, &snap_bdrv_states, entry) {
1582 if (state->ops->abort) {
1583 state->ops->abort(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001584 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05001585 }
1586exit:
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001587 QSIMPLEQ_FOREACH_SAFE(state, &snap_bdrv_states, entry, next) {
1588 if (state->ops->clean) {
1589 state->ops->clean(state);
Wenchao Xiaba0c86a2013-05-08 18:25:16 +08001590 }
Stefan Hajnocziba5d6ab2013-06-24 17:13:15 +02001591 g_free(state);
Jeff Cody8802d1f2012-02-28 15:54:06 -05001592 }
Jeff Cody8802d1f2012-02-28 15:54:06 -05001593}
1594
1595
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001596static void eject_device(BlockBackend *blk, int force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02001597{
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001598 BlockDriverState *bs = blk_bs(blk);
1599
Fam Zheng3718d8a2014-05-23 21:29:43 +08001600 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_EJECT, errp)) {
Stefan Hajnoczi2d3735d2012-01-18 14:40:41 +00001601 return;
1602 }
Markus Armbrustera7f53e22014-10-07 13:59:25 +02001603 if (!blk_dev_has_removable_media(blk)) {
Cole Robinsonf231b882014-03-21 19:42:26 -04001604 error_setg(errp, "Device '%s' is not removable",
1605 bdrv_get_device_name(bs));
Luiz Capitulino92d48552011-12-07 15:47:23 -02001606 return;
Markus Armbrusterea8f9422011-07-20 18:23:35 +02001607 }
Luiz Capitulino92d48552011-12-07 15:47:23 -02001608
Markus Armbrustera7f53e22014-10-07 13:59:25 +02001609 if (blk_dev_is_medium_locked(blk) && !blk_dev_is_tray_open(blk)) {
1610 blk_dev_eject_request(blk, force);
Paolo Bonzini025ccaa2011-11-07 17:50:13 +01001611 if (!force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04001612 error_setg(errp, "Device '%s' is locked",
1613 bdrv_get_device_name(bs));
Luiz Capitulino92d48552011-12-07 15:47:23 -02001614 return;
Paolo Bonzini025ccaa2011-11-07 17:50:13 +01001615 }
Markus Armbruster666daa62010-06-02 18:48:27 +02001616 }
Luiz Capitulino92d48552011-12-07 15:47:23 -02001617
Eduardo Habkost3b5276b2010-06-01 19:12:19 -03001618 bdrv_close(bs);
Markus Armbruster666daa62010-06-02 18:48:27 +02001619}
1620
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02001621void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02001622{
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001623 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +02001624
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001625 blk = blk_by_name(device);
1626 if (!blk) {
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -02001627 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1628 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02001629 }
Luiz Capitulino92d48552011-12-07 15:47:23 -02001630
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001631 eject_device(blk, force, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02001632}
1633
Benoît Canet12d3ba82014-01-23 21:31:35 +01001634void qmp_block_passwd(bool has_device, const char *device,
1635 bool has_node_name, const char *node_name,
1636 const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02001637{
Benoît Canet12d3ba82014-01-23 21:31:35 +01001638 Error *local_err = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +02001639 BlockDriverState *bs;
1640 int err;
1641
Benoît Canet12d3ba82014-01-23 21:31:35 +01001642 bs = bdrv_lookup_bs(has_device ? device : NULL,
1643 has_node_name ? node_name : NULL,
1644 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001645 if (local_err) {
Benoît Canet12d3ba82014-01-23 21:31:35 +01001646 error_propagate(errp, local_err);
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -02001647 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02001648 }
1649
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -02001650 err = bdrv_set_key(bs, password);
Markus Armbruster666daa62010-06-02 18:48:27 +02001651 if (err == -EINVAL) {
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -02001652 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1653 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02001654 } else if (err < 0) {
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -02001655 error_set(errp, QERR_INVALID_PASSWORD);
1656 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02001657 }
Markus Armbruster666daa62010-06-02 18:48:27 +02001658}
1659
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001660static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
1661 int bdrv_flags, BlockDriver *drv,
1662 const char *password, Error **errp)
1663{
Max Reitz34b5d2c2013-09-05 14:45:29 +02001664 Error *local_err = NULL;
Luiz Capitulino0eef4072013-06-07 14:33:48 -04001665 int ret;
1666
Max Reitzddf56362014-02-18 18:33:06 +01001667 ret = bdrv_open(&bs, filename, NULL, NULL, bdrv_flags, drv, &local_err);
Luiz Capitulino0eef4072013-06-07 14:33:48 -04001668 if (ret < 0) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02001669 error_propagate(errp, local_err);
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001670 return;
1671 }
1672
1673 if (bdrv_key_required(bs)) {
1674 if (password) {
1675 if (bdrv_set_key(bs, password) < 0) {
1676 error_set(errp, QERR_INVALID_PASSWORD);
1677 }
1678 } else {
1679 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
1680 bdrv_get_encrypted_filename(bs));
1681 }
1682 } else if (password) {
1683 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
1684 }
1685}
1686
1687void qmp_change_blockdev(const char *device, const char *filename,
Marc-André Lureau314f7ea2013-12-01 22:23:37 +01001688 const char *format, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +02001689{
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001690 BlockBackend *blk;
Markus Armbruster666daa62010-06-02 18:48:27 +02001691 BlockDriverState *bs;
1692 BlockDriver *drv = NULL;
1693 int bdrv_flags;
Luiz Capitulino92d48552011-12-07 15:47:23 -02001694 Error *err = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +02001695
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001696 blk = blk_by_name(device);
1697 if (!blk) {
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001698 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1699 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02001700 }
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001701 bs = blk_bs(blk);
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001702
1703 if (format) {
Fam Zhengb64ec4e2013-05-29 19:35:40 +08001704 drv = bdrv_find_whitelisted_format(format, bs->read_only);
Markus Armbruster666daa62010-06-02 18:48:27 +02001705 if (!drv) {
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001706 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
1707 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02001708 }
1709 }
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001710
Markus Armbruster6007cdd2014-10-07 13:59:24 +02001711 eject_device(blk, 0, &err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001712 if (err) {
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001713 error_propagate(errp, err);
1714 return;
Markus Armbruster666daa62010-06-02 18:48:27 +02001715 }
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001716
Markus Armbruster528f7662010-06-25 15:26:48 +02001717 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
Blue Swirl199630b2010-07-25 20:49:34 +00001718 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
Luiz Capitulino333a96e2011-12-08 11:13:50 -02001719
1720 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +02001721}
Ryan Harper9063f812010-11-12 11:07:13 -06001722
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001723/* throttling disk I/O limits */
Luiz Capitulino80047da2011-12-14 16:49:14 -02001724void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
Benoît Canet3e9fab62013-09-02 14:14:40 +02001725 int64_t bps_wr,
1726 int64_t iops,
1727 int64_t iops_rd,
1728 int64_t iops_wr,
1729 bool has_bps_max,
1730 int64_t bps_max,
1731 bool has_bps_rd_max,
1732 int64_t bps_rd_max,
1733 bool has_bps_wr_max,
1734 int64_t bps_wr_max,
1735 bool has_iops_max,
1736 int64_t iops_max,
1737 bool has_iops_rd_max,
1738 int64_t iops_rd_max,
1739 bool has_iops_wr_max,
Benoît Canet2024c1d2013-09-02 14:14:41 +02001740 int64_t iops_wr_max,
1741 bool has_iops_size,
1742 int64_t iops_size, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001743{
Benoît Canetcc0681c2013-09-02 14:14:39 +02001744 ThrottleConfig cfg;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001745 BlockDriverState *bs;
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02001746 AioContext *aio_context;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001747
Luiz Capitulino80047da2011-12-14 16:49:14 -02001748 bs = bdrv_find(device);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001749 if (!bs) {
Luiz Capitulino80047da2011-12-14 16:49:14 -02001750 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1751 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001752 }
1753
Benoît Canetcc0681c2013-09-02 14:14:39 +02001754 memset(&cfg, 0, sizeof(cfg));
1755 cfg.buckets[THROTTLE_BPS_TOTAL].avg = bps;
1756 cfg.buckets[THROTTLE_BPS_READ].avg = bps_rd;
1757 cfg.buckets[THROTTLE_BPS_WRITE].avg = bps_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001758
Benoît Canetcc0681c2013-09-02 14:14:39 +02001759 cfg.buckets[THROTTLE_OPS_TOTAL].avg = iops;
1760 cfg.buckets[THROTTLE_OPS_READ].avg = iops_rd;
1761 cfg.buckets[THROTTLE_OPS_WRITE].avg = iops_wr;
1762
Benoît Canet3e9fab62013-09-02 14:14:40 +02001763 if (has_bps_max) {
1764 cfg.buckets[THROTTLE_BPS_TOTAL].max = bps_max;
1765 }
1766 if (has_bps_rd_max) {
1767 cfg.buckets[THROTTLE_BPS_READ].max = bps_rd_max;
1768 }
1769 if (has_bps_wr_max) {
1770 cfg.buckets[THROTTLE_BPS_WRITE].max = bps_wr_max;
1771 }
1772 if (has_iops_max) {
1773 cfg.buckets[THROTTLE_OPS_TOTAL].max = iops_max;
1774 }
1775 if (has_iops_rd_max) {
1776 cfg.buckets[THROTTLE_OPS_READ].max = iops_rd_max;
1777 }
1778 if (has_iops_wr_max) {
1779 cfg.buckets[THROTTLE_OPS_WRITE].max = iops_wr_max;
1780 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02001781
Benoît Canet2024c1d2013-09-02 14:14:41 +02001782 if (has_iops_size) {
1783 cfg.op_size = iops_size;
1784 }
Benoît Canetcc0681c2013-09-02 14:14:39 +02001785
1786 if (!check_throttle_config(&cfg, errp)) {
Luiz Capitulino80047da2011-12-14 16:49:14 -02001787 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001788 }
1789
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02001790 aio_context = bdrv_get_aio_context(bs);
1791 aio_context_acquire(aio_context);
1792
Benoît Canetcc0681c2013-09-02 14:14:39 +02001793 if (!bs->io_limits_enabled && throttle_enabled(&cfg)) {
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001794 bdrv_io_limits_enable(bs);
Benoît Canetcc0681c2013-09-02 14:14:39 +02001795 } else if (bs->io_limits_enabled && !throttle_enabled(&cfg)) {
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001796 bdrv_io_limits_disable(bs);
Benoît Canetcc0681c2013-09-02 14:14:39 +02001797 }
1798
1799 if (bs->io_limits_enabled) {
1800 bdrv_set_io_limits(bs, &cfg);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001801 }
Stefan Hajnoczib15446f2014-05-14 16:22:47 +02001802
1803 aio_context_release(aio_context);
Zhi Yong Wu727f0052011-11-08 13:00:31 +08001804}
1805
Ryan Harper9063f812010-11-12 11:07:13 -06001806int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
1807{
1808 const char *id = qdict_get_str(qdict, "id");
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001809 BlockBackend *blk;
Ryan Harper9063f812010-11-12 11:07:13 -06001810 BlockDriverState *bs;
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01001811 AioContext *aio_context;
Fam Zheng3718d8a2014-05-23 21:29:43 +08001812 Error *local_err = NULL;
Ryan Harper9063f812010-11-12 11:07:13 -06001813
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001814 blk = blk_by_name(id);
1815 if (!blk) {
Markus Armbrusterb1422f22014-05-16 11:00:09 +02001816 error_report("Device '%s' not found", id);
Ryan Harper9063f812010-11-12 11:07:13 -06001817 return -1;
1818 }
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001819 bs = blk_bs(blk);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01001820
Markus Armbruster26f8b3a2014-10-07 13:59:22 +02001821 if (!blk_legacy_dinfo(blk)) {
Markus Armbruster48f364d2014-09-11 16:45:39 +02001822 error_report("Deleting device added with blockdev-add"
1823 " is not supported");
1824 return -1;
1825 }
1826
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01001827 aio_context = bdrv_get_aio_context(bs);
1828 aio_context_acquire(aio_context);
1829
Fam Zheng3718d8a2014-05-23 21:29:43 +08001830 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
1831 error_report("%s", error_get_pretty(local_err));
1832 error_free(local_err);
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01001833 aio_context_release(aio_context);
Marcelo Tosatti85916752011-01-26 12:12:35 -02001834 return -1;
1835 }
Ryan Harper9063f812010-11-12 11:07:13 -06001836
1837 /* quiesce block driver; prevent further io */
Stefan Hajnoczi922453b2011-11-30 12:23:43 +00001838 bdrv_drain_all();
Ryan Harper9063f812010-11-12 11:07:13 -06001839 bdrv_flush(bs);
1840 bdrv_close(bs);
1841
Markus Armbrusterfa879d62011-08-03 15:07:40 +02001842 /* if we have a device attached to this BlockDriverState
Ryan Harperd22b2f42011-03-29 20:51:47 -05001843 * then we need to make the drive anonymous until the device
1844 * can be removed. If this is a drive with no device backing
1845 * then we can just get rid of the block driver state right here.
1846 */
Markus Armbrustera7f53e22014-10-07 13:59:25 +02001847 if (blk_get_attached_dev(blk)) {
Markus Armbruster7e7d56d2014-10-07 13:59:05 +02001848 blk_hide_on_behalf_of_do_drive_del(blk);
Stefan Hajnoczi293c51a2013-06-05 10:33:14 +02001849 /* Further I/O must not pause the guest */
1850 bdrv_set_on_error(bs, BLOCKDEV_ON_ERROR_REPORT,
1851 BLOCKDEV_ON_ERROR_REPORT);
Ryan Harperd22b2f42011-03-29 20:51:47 -05001852 } else {
Markus Armbrusterb9fe8a72014-10-07 13:59:09 +02001853 blk_unref(blk);
Ryan Harper9063f812010-11-12 11:07:13 -06001854 }
1855
Stefan Hajnoczi8ad42022014-08-18 16:07:12 +01001856 aio_context_release(aio_context);
Ryan Harper9063f812010-11-12 11:07:13 -06001857 return 0;
1858}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001859
Benoît Canet3b1dbd12014-01-23 21:31:37 +01001860void qmp_block_resize(bool has_device, const char *device,
1861 bool has_node_name, const char *node_name,
1862 int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001863{
Benoît Canet3b1dbd12014-01-23 21:31:37 +01001864 Error *local_err = NULL;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001865 BlockDriverState *bs;
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01001866 AioContext *aio_context;
Kevin Wolf87329012013-05-02 15:32:55 +02001867 int ret;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001868
Benoît Canet3b1dbd12014-01-23 21:31:37 +01001869 bs = bdrv_lookup_bs(has_device ? device : NULL,
1870 has_node_name ? node_name : NULL,
1871 &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001872 if (local_err) {
Benoît Canet3b1dbd12014-01-23 21:31:37 +01001873 error_propagate(errp, local_err);
1874 return;
1875 }
1876
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01001877 aio_context = bdrv_get_aio_context(bs);
1878 aio_context_acquire(aio_context);
1879
Benoît Canet3b1dbd12014-01-23 21:31:37 +01001880 if (!bdrv_is_first_non_filter(bs)) {
1881 error_set(errp, QERR_FEATURE_DISABLED, "resize");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01001882 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001883 }
1884
1885 if (size < 0) {
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00001886 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01001887 goto out;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001888 }
1889
Jeff Cody9c75e162014-06-25 16:55:30 -04001890 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_RESIZE, NULL)) {
1891 error_set(errp, QERR_DEVICE_IN_USE, device);
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01001892 goto out;
Jeff Cody9c75e162014-06-25 16:55:30 -04001893 }
1894
Peter Lieven92b7a082013-03-11 11:04:24 +01001895 /* complete all in-flight operations before resizing the device */
1896 bdrv_drain_all();
1897
Kevin Wolf87329012013-05-02 15:32:55 +02001898 ret = bdrv_truncate(bs, size);
1899 switch (ret) {
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00001900 case 0:
1901 break;
1902 case -ENOMEDIUM:
1903 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1904 break;
1905 case -ENOTSUP:
1906 error_set(errp, QERR_UNSUPPORTED);
1907 break;
1908 case -EACCES:
1909 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1910 break;
1911 case -EBUSY:
1912 error_set(errp, QERR_DEVICE_IN_USE, device);
1913 break;
1914 default:
Kevin Wolf87329012013-05-02 15:32:55 +02001915 error_setg_errno(errp, -ret, "Could not resize");
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00001916 break;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001917 }
Stefan Hajnoczi927e0e72014-08-18 14:52:28 +01001918
1919out:
1920 aio_context_release(aio_context);
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001921}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001922
Jeff Cody9abf2db2012-09-27 13:29:14 -04001923static void block_job_cb(void *opaque, int ret)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001924{
1925 BlockDriverState *bs = opaque;
Wenchao Xiabcada37b2014-06-18 08:43:47 +02001926 const char *msg = NULL;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001927
Jeff Cody9abf2db2012-09-27 13:29:14 -04001928 trace_block_job_cb(bs, bs->job, ret);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001929
1930 assert(bs->job);
Wenchao Xiabcada37b2014-06-18 08:43:47 +02001931
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001932 if (ret < 0) {
Wenchao Xiabcada37b2014-06-18 08:43:47 +02001933 msg = strerror(-ret);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001934 }
1935
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00001936 if (block_job_is_cancelled(bs->job)) {
Wenchao Xiabcada37b2014-06-18 08:43:47 +02001937 block_job_event_cancelled(bs->job);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00001938 } else {
Wenchao Xiabcada37b2014-06-18 08:43:47 +02001939 block_job_event_completed(bs->job, msg);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00001940 }
Stefan Hajnocziaa398a52012-01-18 14:40:50 +00001941
Fam Zhengfa510eb2013-08-23 09:14:51 +08001942 bdrv_put_ref_bh_schedule(bs);
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001943}
1944
Jeff Cody13d8cc52014-06-25 15:40:11 -04001945void qmp_block_stream(const char *device,
1946 bool has_base, const char *base,
1947 bool has_backing_file, const char *backing_file,
1948 bool has_speed, int64_t speed,
Paolo Bonzini1d809092012-09-28 17:22:59 +02001949 bool has_on_error, BlockdevOnError on_error,
1950 Error **errp)
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001951{
1952 BlockDriverState *bs;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00001953 BlockDriverState *base_bs = NULL;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01001954 Error *local_err = NULL;
Jeff Cody13d8cc52014-06-25 15:40:11 -04001955 const char *base_name = NULL;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001956
Paolo Bonzini1d809092012-09-28 17:22:59 +02001957 if (!has_on_error) {
1958 on_error = BLOCKDEV_ON_ERROR_REPORT;
1959 }
1960
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001961 bs = bdrv_find(device);
1962 if (!bs) {
1963 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1964 return;
1965 }
1966
Fam Zheng628ff682014-05-23 21:29:44 +08001967 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_STREAM, errp)) {
1968 return;
1969 }
1970
Jeff Cody13d8cc52014-06-25 15:40:11 -04001971 if (has_base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00001972 base_bs = bdrv_find_backing_image(bs, base);
1973 if (base_bs == NULL) {
1974 error_set(errp, QERR_BASE_NOT_FOUND, base);
1975 return;
1976 }
Jeff Cody13d8cc52014-06-25 15:40:11 -04001977 base_name = base;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001978 }
1979
Jeff Cody13d8cc52014-06-25 15:40:11 -04001980 /* if we are streaming the entire chain, the result will have no backing
1981 * file, and specifying one is therefore an error */
1982 if (base_bs == NULL && has_backing_file) {
1983 error_setg(errp, "backing file specified, but streaming the "
1984 "entire chain");
1985 return;
1986 }
1987
1988 /* backing_file string overrides base bs filename */
1989 base_name = has_backing_file ? backing_file : base_name;
1990
1991 stream_start(bs, base_bs, base_name, has_speed ? speed : 0,
Paolo Bonzini1d809092012-09-28 17:22:59 +02001992 on_error, block_job_cb, bs, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01001993 if (local_err) {
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01001994 error_propagate(errp, local_err);
1995 return;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001996 }
1997
1998 trace_qmp_block_stream(bs, bs->job);
1999}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00002000
Jeff Codyed61fc12012-09-27 13:29:16 -04002001void qmp_block_commit(const char *device,
Jeff Cody7676e2c2014-06-30 15:14:15 +02002002 bool has_base, const char *base,
2003 bool has_top, const char *top,
Jeff Cody54e26902014-06-25 15:40:10 -04002004 bool has_backing_file, const char *backing_file,
Jeff Codyed61fc12012-09-27 13:29:16 -04002005 bool has_speed, int64_t speed,
2006 Error **errp)
2007{
2008 BlockDriverState *bs;
2009 BlockDriverState *base_bs, *top_bs;
2010 Error *local_err = NULL;
2011 /* This will be part of the QMP command, if/when the
2012 * BlockdevOnError change for blkmirror makes it in
2013 */
Paolo Bonzini92aa5c62012-09-28 17:22:55 +02002014 BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT;
Jeff Codyed61fc12012-09-27 13:29:16 -04002015
Max Reitz54504662014-04-10 19:36:25 +02002016 if (!has_speed) {
2017 speed = 0;
2018 }
2019
Jeff Codyed61fc12012-09-27 13:29:16 -04002020 /* drain all i/o before commits */
2021 bdrv_drain_all();
2022
Jeff Cody7676e2c2014-06-30 15:14:15 +02002023 /* Important Note:
2024 * libvirt relies on the DeviceNotFound error class in order to probe for
2025 * live commit feature versions; for this to work, we must make sure to
2026 * perform the device lookup before any generic errors that may occur in a
2027 * scenario in which all optional arguments are omitted. */
Jeff Codyed61fc12012-09-27 13:29:16 -04002028 bs = bdrv_find(device);
2029 if (!bs) {
2030 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
2031 return;
2032 }
Jeff Codyed61fc12012-09-27 13:29:16 -04002033
Fam Zheng628ff682014-05-23 21:29:44 +08002034 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_COMMIT, errp)) {
2035 return;
2036 }
2037
Jeff Codyed61fc12012-09-27 13:29:16 -04002038 /* default top_bs is the active layer */
2039 top_bs = bs;
2040
Jeff Cody7676e2c2014-06-30 15:14:15 +02002041 if (has_top && top) {
Jeff Codyed61fc12012-09-27 13:29:16 -04002042 if (strcmp(bs->filename, top) != 0) {
2043 top_bs = bdrv_find_backing_image(bs, top);
2044 }
2045 }
2046
2047 if (top_bs == NULL) {
2048 error_setg(errp, "Top image file %s not found", top ? top : "NULL");
2049 return;
2050 }
2051
Jeff Codyd5208c42012-10-16 15:49:10 -04002052 if (has_base && base) {
2053 base_bs = bdrv_find_backing_image(top_bs, base);
2054 } else {
2055 base_bs = bdrv_find_base(top_bs);
2056 }
2057
2058 if (base_bs == NULL) {
2059 error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
2060 return;
2061 }
2062
Jeff Cody7676e2c2014-06-30 15:14:15 +02002063 /* Do not allow attempts to commit an image into itself */
2064 if (top_bs == base_bs) {
2065 error_setg(errp, "cannot commit an image into itself");
2066 return;
2067 }
2068
Fam Zheng20a63d22013-12-16 14:45:31 +08002069 if (top_bs == bs) {
Jeff Cody54e26902014-06-25 15:40:10 -04002070 if (has_backing_file) {
2071 error_setg(errp, "'backing-file' specified,"
2072 " but 'top' is the active layer");
2073 return;
2074 }
Fam Zheng20a63d22013-12-16 14:45:31 +08002075 commit_active_start(bs, base_bs, speed, on_error, block_job_cb,
2076 bs, &local_err);
2077 } else {
2078 commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs,
Jeff Cody54e26902014-06-25 15:40:10 -04002079 has_backing_file ? backing_file : NULL, &local_err);
Fam Zheng20a63d22013-12-16 14:45:31 +08002080 }
Jeff Codyed61fc12012-09-27 13:29:16 -04002081 if (local_err != NULL) {
2082 error_propagate(errp, local_err);
2083 return;
2084 }
Jeff Codyed61fc12012-09-27 13:29:16 -04002085}
2086
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002087void qmp_drive_backup(const char *device, const char *target,
2088 bool has_format, const char *format,
Stefan Hajnoczib53169e2013-06-26 14:11:57 +02002089 enum MirrorSyncMode sync,
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002090 bool has_mode, enum NewImageMode mode,
2091 bool has_speed, int64_t speed,
2092 bool has_on_source_error, BlockdevOnError on_source_error,
2093 bool has_on_target_error, BlockdevOnError on_target_error,
2094 Error **errp)
2095{
2096 BlockDriverState *bs;
2097 BlockDriverState *target_bs;
Ian Mainfc5d3f82013-07-26 11:39:04 -07002098 BlockDriverState *source = NULL;
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002099 BlockDriver *drv = NULL;
2100 Error *local_err = NULL;
2101 int flags;
2102 int64_t size;
2103 int ret;
2104
2105 if (!has_speed) {
2106 speed = 0;
2107 }
2108 if (!has_on_source_error) {
2109 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
2110 }
2111 if (!has_on_target_error) {
2112 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
2113 }
2114 if (!has_mode) {
2115 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
2116 }
2117
2118 bs = bdrv_find(device);
2119 if (!bs) {
2120 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
2121 return;
2122 }
2123
2124 if (!bdrv_is_inserted(bs)) {
2125 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
2126 return;
2127 }
2128
2129 if (!has_format) {
2130 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
2131 }
2132 if (format) {
2133 drv = bdrv_find_format(format);
2134 if (!drv) {
2135 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
2136 return;
2137 }
2138 }
2139
Fam Zheng3718d8a2014-05-23 21:29:43 +08002140 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_BACKUP_SOURCE, errp)) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002141 return;
2142 }
2143
2144 flags = bs->open_flags | BDRV_O_RDWR;
2145
Ian Mainfc5d3f82013-07-26 11:39:04 -07002146 /* See if we have a backing HD we can use to create our new image
2147 * on top of. */
2148 if (sync == MIRROR_SYNC_MODE_TOP) {
2149 source = bs->backing_hd;
2150 if (!source) {
2151 sync = MIRROR_SYNC_MODE_FULL;
2152 }
2153 }
2154 if (sync == MIRROR_SYNC_MODE_NONE) {
2155 source = bs;
2156 }
2157
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002158 size = bdrv_getlength(bs);
2159 if (size < 0) {
2160 error_setg_errno(errp, -size, "bdrv_getlength failed");
2161 return;
2162 }
2163
2164 if (mode != NEW_IMAGE_MODE_EXISTING) {
2165 assert(format && drv);
Ian Mainfc5d3f82013-07-26 11:39:04 -07002166 if (source) {
2167 bdrv_img_create(target, format, source->filename,
2168 source->drv->format_name, NULL,
2169 size, flags, &local_err, false);
2170 } else {
2171 bdrv_img_create(target, format, NULL, NULL, NULL,
2172 size, flags, &local_err, false);
2173 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002174 }
2175
Markus Armbruster84d18f02014-01-30 15:07:28 +01002176 if (local_err) {
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002177 error_propagate(errp, local_err);
2178 return;
2179 }
2180
Max Reitzf67503e2014-02-18 18:33:05 +01002181 target_bs = NULL;
Max Reitzddf56362014-02-18 18:33:06 +01002182 ret = bdrv_open(&target_bs, target, NULL, NULL, flags, drv, &local_err);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002183 if (ret < 0) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02002184 error_propagate(errp, local_err);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002185 return;
2186 }
2187
Ian Mainfc5d3f82013-07-26 11:39:04 -07002188 backup_start(bs, target_bs, speed, sync, on_source_error, on_target_error,
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002189 block_job_cb, bs, &local_err);
2190 if (local_err != NULL) {
Fam Zheng4f6fd342013-08-23 09:14:47 +08002191 bdrv_unref(target_bs);
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002192 error_propagate(errp, local_err);
2193 return;
2194 }
Stefan Hajnoczi99a9add2013-06-24 17:13:14 +02002195}
2196
Benoît Canetc13163f2014-01-23 21:31:34 +01002197BlockDeviceInfoList *qmp_query_named_block_nodes(Error **errp)
2198{
2199 return bdrv_named_nodes_list();
2200}
2201
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01002202#define DEFAULT_MIRROR_BUF_SIZE (10 << 20)
2203
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002204void qmp_drive_mirror(const char *device, const char *target,
2205 bool has_format, const char *format,
Benoît Canet4c828dc2014-06-16 12:00:55 +02002206 bool has_node_name, const char *node_name,
Benoît Canet09158f02014-06-27 18:25:25 +02002207 bool has_replaces, const char *replaces,
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002208 enum MirrorSyncMode sync,
2209 bool has_mode, enum NewImageMode mode,
Paolo Bonzinib952b552012-10-18 16:49:28 +02002210 bool has_speed, int64_t speed,
Paolo Bonzinieee13df2013-01-21 17:09:46 +01002211 bool has_granularity, uint32_t granularity,
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01002212 bool has_buf_size, int64_t buf_size,
Paolo Bonzinib952b552012-10-18 16:49:28 +02002213 bool has_on_source_error, BlockdevOnError on_source_error,
2214 bool has_on_target_error, BlockdevOnError on_target_error,
2215 Error **errp)
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002216{
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002217 BlockDriverState *bs;
2218 BlockDriverState *source, *target_bs;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002219 BlockDriver *drv = NULL;
2220 Error *local_err = NULL;
Benoît Canet4c828dc2014-06-16 12:00:55 +02002221 QDict *options = NULL;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002222 int flags;
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02002223 int64_t size;
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002224 int ret;
2225
2226 if (!has_speed) {
2227 speed = 0;
2228 }
Paolo Bonzinib952b552012-10-18 16:49:28 +02002229 if (!has_on_source_error) {
2230 on_source_error = BLOCKDEV_ON_ERROR_REPORT;
2231 }
2232 if (!has_on_target_error) {
2233 on_target_error = BLOCKDEV_ON_ERROR_REPORT;
2234 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002235 if (!has_mode) {
2236 mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
2237 }
Paolo Bonzinieee13df2013-01-21 17:09:46 +01002238 if (!has_granularity) {
2239 granularity = 0;
2240 }
Paolo Bonzini08e4ed62013-01-22 09:03:13 +01002241 if (!has_buf_size) {
2242 buf_size = DEFAULT_MIRROR_BUF_SIZE;
2243 }
2244
Paolo Bonzinieee13df2013-01-21 17:09:46 +01002245 if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) {
Stefan Hajnoczi3cbbe9f2014-08-27 14:29:59 +01002246 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "granularity",
2247 "a value in range [512B, 64MB]");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01002248 return;
2249 }
2250 if (granularity & (granularity - 1)) {
Stefan Hajnoczi3cbbe9f2014-08-27 14:29:59 +01002251 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "granularity", "power of 2");
Paolo Bonzinieee13df2013-01-21 17:09:46 +01002252 return;
2253 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002254
2255 bs = bdrv_find(device);
2256 if (!bs) {
2257 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
2258 return;
2259 }
2260
2261 if (!bdrv_is_inserted(bs)) {
2262 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
2263 return;
2264 }
2265
2266 if (!has_format) {
2267 format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
2268 }
2269 if (format) {
2270 drv = bdrv_find_format(format);
2271 if (!drv) {
2272 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
2273 return;
2274 }
2275 }
2276
Fam Zheng3718d8a2014-05-23 21:29:43 +08002277 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_MIRROR, errp)) {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002278 return;
2279 }
2280
2281 flags = bs->open_flags | BDRV_O_RDWR;
2282 source = bs->backing_hd;
2283 if (!source && sync == MIRROR_SYNC_MODE_TOP) {
2284 sync = MIRROR_SYNC_MODE_FULL;
2285 }
Max Reitz117e0c82013-11-25 20:28:55 +01002286 if (sync == MIRROR_SYNC_MODE_NONE) {
2287 source = bs;
2288 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002289
Stefan Hajnocziac3c5d82013-06-24 17:13:13 +02002290 size = bdrv_getlength(bs);
2291 if (size < 0) {
2292 error_setg_errno(errp, -size, "bdrv_getlength failed");
2293 return;
2294 }
2295
Benoît Canet09158f02014-06-27 18:25:25 +02002296 if (has_replaces) {
2297 BlockDriverState *to_replace_bs;
2298
2299 if (!has_node_name) {
2300 error_setg(errp, "a node-name must be provided when replacing a"
2301 " named node of the graph");
2302 return;
2303 }
2304
2305 to_replace_bs = check_to_replace_node(replaces, &local_err);
2306
2307 if (!to_replace_bs) {
2308 error_propagate(errp, local_err);
2309 return;
2310 }
2311
2312 if (size != bdrv_getlength(to_replace_bs)) {
2313 error_setg(errp, "cannot replace image with a mirror image of "
2314 "different size");
2315 return;
2316 }
2317 }
2318
Max Reitz14526862013-11-06 19:50:44 +01002319 if ((sync == MIRROR_SYNC_MODE_FULL || !source)
2320 && mode != NEW_IMAGE_MODE_EXISTING)
2321 {
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002322 /* create new image w/o backing file */
2323 assert(format && drv);
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02002324 bdrv_img_create(target, format,
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002325 NULL, NULL, NULL, size, flags, &local_err, false);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002326 } else {
2327 switch (mode) {
2328 case NEW_IMAGE_MODE_EXISTING:
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002329 break;
2330 case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
2331 /* create new image with backing file */
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02002332 bdrv_img_create(target, format,
2333 source->filename,
2334 source->drv->format_name,
Miroslav Rezaninaf382d432013-02-13 09:09:40 +01002335 NULL, size, flags, &local_err, false);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002336 break;
2337 default:
2338 abort();
2339 }
2340 }
2341
Markus Armbruster84d18f02014-01-30 15:07:28 +01002342 if (local_err) {
Luiz Capitulinocf8f2422012-11-30 10:52:08 -02002343 error_propagate(errp, local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002344 return;
2345 }
2346
Benoît Canet4c828dc2014-06-16 12:00:55 +02002347 if (has_node_name) {
2348 options = qdict_new();
2349 qdict_put(options, "node-name", qstring_from_str(node_name));
2350 }
2351
Paolo Bonzinib812f672013-01-21 17:09:43 +01002352 /* Mirroring takes care of copy-on-write using the source's backing
2353 * file.
2354 */
Max Reitzf67503e2014-02-18 18:33:05 +01002355 target_bs = NULL;
Benoît Canet4c828dc2014-06-16 12:00:55 +02002356 ret = bdrv_open(&target_bs, target, NULL, options,
2357 flags | BDRV_O_NO_BACKING, drv, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002358 if (ret < 0) {
Max Reitz34b5d2c2013-09-05 14:45:29 +02002359 error_propagate(errp, local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002360 return;
2361 }
2362
Benoît Canet09158f02014-06-27 18:25:25 +02002363 /* pass the node name to replace to mirror start since it's loose coupling
2364 * and will allow to check whether the node still exist at mirror completion
2365 */
2366 mirror_start(bs, target_bs,
2367 has_replaces ? replaces : NULL,
2368 speed, granularity, buf_size, sync,
Paolo Bonzinieee13df2013-01-21 17:09:46 +01002369 on_source_error, on_target_error,
Paolo Bonzinib952b552012-10-18 16:49:28 +02002370 block_job_cb, bs, &local_err);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002371 if (local_err != NULL) {
Fam Zheng4f6fd342013-08-23 09:14:47 +08002372 bdrv_unref(target_bs);
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002373 error_propagate(errp, local_err);
2374 return;
2375 }
Paolo Bonzinid9b902d2012-10-18 16:49:24 +02002376}
2377
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00002378static BlockJob *find_block_job(const char *device)
2379{
2380 BlockDriverState *bs;
2381
2382 bs = bdrv_find(device);
2383 if (!bs || !bs->job) {
2384 return NULL;
2385 }
2386 return bs->job;
2387}
2388
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01002389void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp)
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00002390{
2391 BlockJob *job = find_block_job(device);
2392
2393 if (!job) {
Paolo Bonzini7ef15072012-09-28 17:22:44 +02002394 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00002395 return;
2396 }
2397
Stefan Hajnoczi882ec7c2012-04-25 16:51:02 +01002398 block_job_set_speed(job, speed, errp);
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00002399}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002400
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02002401void qmp_block_job_cancel(const char *device,
2402 bool has_force, bool force, Error **errp)
2403{
2404 BlockJob *job = find_block_job(device);
2405
2406 if (!has_force) {
2407 force = false;
2408 }
2409
2410 if (!job) {
2411 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2412 return;
2413 }
2414 if (job->paused && !force) {
Cole Robinsonf231b882014-03-21 19:42:26 -04002415 error_setg(errp, "The block job for device '%s' is currently paused",
2416 device);
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02002417 return;
2418 }
2419
2420 trace_qmp_block_job_cancel(job);
2421 block_job_cancel(job);
2422}
2423
2424void qmp_block_job_pause(const char *device, Error **errp)
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002425{
2426 BlockJob *job = find_block_job(device);
2427
2428 if (!job) {
Paolo Bonzini7ef15072012-09-28 17:22:44 +02002429 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002430 return;
2431 }
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02002432
2433 trace_qmp_block_job_pause(job);
2434 block_job_pause(job);
2435}
2436
2437void qmp_block_job_resume(const char *device, Error **errp)
2438{
2439 BlockJob *job = find_block_job(device);
2440
2441 if (!job) {
2442 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
Paolo Bonzini8acc72a2012-09-28 17:22:50 +02002443 return;
2444 }
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002445
Paolo Bonzini6e37fb82012-09-28 17:22:51 +02002446 trace_qmp_block_job_resume(job);
2447 block_job_resume(job);
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00002448}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00002449
Paolo Bonziniaeae8832012-10-18 16:49:21 +02002450void qmp_block_job_complete(const char *device, Error **errp)
2451{
2452 BlockJob *job = find_block_job(device);
2453
2454 if (!job) {
2455 error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device);
2456 return;
2457 }
2458
2459 trace_qmp_block_job_complete(job);
2460 block_job_complete(job, errp);
2461}
2462
Jeff Codyfa40e652014-07-01 09:52:16 +02002463void qmp_change_backing_file(const char *device,
2464 const char *image_node_name,
2465 const char *backing_file,
2466 Error **errp)
2467{
2468 BlockDriverState *bs = NULL;
2469 BlockDriverState *image_bs = NULL;
2470 Error *local_err = NULL;
2471 bool ro;
2472 int open_flags;
2473 int ret;
2474
2475 /* find the top layer BDS of the chain */
2476 bs = bdrv_find(device);
2477 if (!bs) {
2478 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
2479 return;
2480 }
2481
2482 image_bs = bdrv_lookup_bs(NULL, image_node_name, &local_err);
2483 if (local_err) {
2484 error_propagate(errp, local_err);
2485 return;
2486 }
2487
2488 if (!image_bs) {
2489 error_setg(errp, "image file not found");
2490 return;
2491 }
2492
2493 if (bdrv_find_base(image_bs) == image_bs) {
2494 error_setg(errp, "not allowing backing file change on an image "
2495 "without a backing file");
2496 return;
2497 }
2498
2499 /* even though we are not necessarily operating on bs, we need it to
2500 * determine if block ops are currently prohibited on the chain */
2501 if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_CHANGE, errp)) {
2502 return;
2503 }
2504
2505 /* final sanity check */
2506 if (!bdrv_chain_contains(bs, image_bs)) {
2507 error_setg(errp, "'%s' and image file are not in the same chain",
2508 device);
2509 return;
2510 }
2511
2512 /* if not r/w, reopen to make r/w */
2513 open_flags = image_bs->open_flags;
2514 ro = bdrv_is_read_only(image_bs);
2515
2516 if (ro) {
2517 bdrv_reopen(image_bs, open_flags | BDRV_O_RDWR, &local_err);
2518 if (local_err) {
2519 error_propagate(errp, local_err);
2520 return;
2521 }
2522 }
2523
2524 ret = bdrv_change_backing_file(image_bs, backing_file,
2525 image_bs->drv ? image_bs->drv->format_name : "");
2526
2527 if (ret < 0) {
2528 error_setg_errno(errp, -ret, "Could not change backing file to '%s'",
2529 backing_file);
2530 /* don't exit here, so we can try to restore open flags if
2531 * appropriate */
2532 }
2533
2534 if (ro) {
2535 bdrv_reopen(image_bs, open_flags, &local_err);
2536 if (local_err) {
2537 error_propagate(errp, local_err); /* will preserve prior errp */
2538 }
2539 }
2540}
2541
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002542void qmp_blockdev_add(BlockdevOptions *options, Error **errp)
2543{
2544 QmpOutputVisitor *ov = qmp_output_visitor_new();
Markus Armbruster18e46a02014-10-07 13:59:06 +02002545 BlockBackend *blk;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002546 QObject *obj;
2547 QDict *qdict;
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002548 Error *local_err = NULL;
2549
2550 /* Require an ID in the top level */
2551 if (!options->has_id) {
2552 error_setg(errp, "Block device needs an ID");
2553 goto fail;
2554 }
2555
Markus Armbruster60e19e02014-06-06 14:50:58 +02002556 /* TODO Sort it out in raw-posix and drive_new(): Reject aio=native with
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002557 * cache.direct=false instead of silently switching to aio=threads, except
Markus Armbruster60e19e02014-06-06 14:50:58 +02002558 * when called from drive_new().
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002559 *
2560 * For now, simply forbidding the combination for all drivers will do. */
2561 if (options->has_aio && options->aio == BLOCKDEV_AIO_OPTIONS_NATIVE) {
Kevin Wolfc6e0bd92014-03-06 15:47:32 +01002562 bool direct = options->has_cache &&
2563 options->cache->has_direct &&
2564 options->cache->direct;
2565 if (!direct) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002566 error_setg(errp, "aio=native requires cache.direct=true");
2567 goto fail;
2568 }
2569 }
2570
2571 visit_type_BlockdevOptions(qmp_output_get_visitor(ov),
2572 &options, NULL, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002573 if (local_err) {
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002574 error_propagate(errp, local_err);
2575 goto fail;
2576 }
2577
2578 obj = qmp_output_get_qobject(ov);
2579 qdict = qobject_to_qdict(obj);
2580
2581 qdict_flatten(qdict);
2582
Markus Armbruster18e46a02014-10-07 13:59:06 +02002583 blk = blockdev_init(NULL, qdict, &local_err);
Markus Armbruster84d18f02014-01-30 15:07:28 +01002584 if (local_err) {
Kevin Wolfb6810722013-09-20 11:33:11 +02002585 error_propagate(errp, local_err);
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002586 goto fail;
2587 }
2588
Markus Armbruster18e46a02014-10-07 13:59:06 +02002589 if (bdrv_key_required(blk_bs(blk))) {
Markus Armbruster18e46a02014-10-07 13:59:06 +02002590 blk_unref(blk);
Kevin Wolf8ae8e902014-03-06 15:43:42 +01002591 error_setg(errp, "blockdev-add doesn't support encrypted devices");
2592 goto fail;
2593 }
2594
Kevin Wolfd26c9a12013-09-23 15:26:03 +02002595fail:
2596 qmp_output_visitor_cleanup(ov);
2597}
2598
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00002599BlockJobInfoList *qmp_query_block_jobs(Error **errp)
2600{
Markus Armbrusterfea68bb2014-10-07 13:59:10 +02002601 BlockJobInfoList *head = NULL, **p_next = &head;
2602 BlockDriverState *bs;
2603
2604 for (bs = bdrv_next(NULL); bs; bs = bdrv_next(bs)) {
2605 if (bs->job) {
2606 BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
2607 elem->value = block_job_query(bs->job);
2608 *p_next = elem;
2609 p_next = &elem->next;
2610 }
2611 }
2612
2613 return head;
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00002614}
Paolo Bonzini4d454572012-11-26 16:03:42 +01002615
Kevin Wolf00063832013-03-15 10:35:07 +01002616QemuOptsList qemu_common_drive_opts = {
Paolo Bonzini4d454572012-11-26 16:03:42 +01002617 .name = "drive",
Kevin Wolf00063832013-03-15 10:35:07 +01002618 .head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head),
Paolo Bonzini4d454572012-11-26 16:03:42 +01002619 .desc = {
2620 {
Paolo Bonzini4d454572012-11-26 16:03:42 +01002621 .name = "snapshot",
2622 .type = QEMU_OPT_BOOL,
2623 .help = "enable/disable snapshot mode",
2624 },{
Paolo Bonzinia9384af2013-02-08 14:06:12 +01002625 .name = "discard",
2626 .type = QEMU_OPT_STRING,
2627 .help = "discard operation (ignore/off, unmap/on)",
2628 },{
Kevin Wolf29c4e2b2013-07-18 16:31:25 +02002629 .name = "cache.writeback",
2630 .type = QEMU_OPT_BOOL,
2631 .help = "enables writeback mode for any caches",
2632 },{
2633 .name = "cache.direct",
2634 .type = QEMU_OPT_BOOL,
2635 .help = "enables use of O_DIRECT (bypass the host page cache)",
2636 },{
2637 .name = "cache.no-flush",
2638 .type = QEMU_OPT_BOOL,
2639 .help = "ignore any flush requests for the device",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002640 },{
2641 .name = "aio",
2642 .type = QEMU_OPT_STRING,
2643 .help = "host AIO implementation (threads, native)",
2644 },{
2645 .name = "format",
2646 .type = QEMU_OPT_STRING,
2647 .help = "disk format (raw, qcow2, ...)",
2648 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01002649 .name = "rerror",
2650 .type = QEMU_OPT_STRING,
2651 .help = "read error action",
2652 },{
2653 .name = "werror",
2654 .type = QEMU_OPT_STRING,
2655 .help = "write error action",
2656 },{
Kevin Wolf0f227a92013-07-19 20:07:29 +02002657 .name = "read-only",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002658 .type = QEMU_OPT_BOOL,
2659 .help = "open drive file as read-only",
2660 },{
Kevin Wolf57975222013-07-17 14:41:54 +02002661 .name = "throttling.iops-total",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002662 .type = QEMU_OPT_NUMBER,
2663 .help = "limit total I/O operations per second",
2664 },{
Kevin Wolf57975222013-07-17 14:41:54 +02002665 .name = "throttling.iops-read",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002666 .type = QEMU_OPT_NUMBER,
2667 .help = "limit read operations per second",
2668 },{
Kevin Wolf57975222013-07-17 14:41:54 +02002669 .name = "throttling.iops-write",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002670 .type = QEMU_OPT_NUMBER,
2671 .help = "limit write operations per second",
2672 },{
Kevin Wolf57975222013-07-17 14:41:54 +02002673 .name = "throttling.bps-total",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002674 .type = QEMU_OPT_NUMBER,
2675 .help = "limit total bytes per second",
2676 },{
Kevin Wolf57975222013-07-17 14:41:54 +02002677 .name = "throttling.bps-read",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002678 .type = QEMU_OPT_NUMBER,
2679 .help = "limit read bytes per second",
2680 },{
Kevin Wolf57975222013-07-17 14:41:54 +02002681 .name = "throttling.bps-write",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002682 .type = QEMU_OPT_NUMBER,
2683 .help = "limit write bytes per second",
2684 },{
Benoît Canet3e9fab62013-09-02 14:14:40 +02002685 .name = "throttling.iops-total-max",
2686 .type = QEMU_OPT_NUMBER,
2687 .help = "I/O operations burst",
2688 },{
2689 .name = "throttling.iops-read-max",
2690 .type = QEMU_OPT_NUMBER,
2691 .help = "I/O operations read burst",
2692 },{
2693 .name = "throttling.iops-write-max",
2694 .type = QEMU_OPT_NUMBER,
2695 .help = "I/O operations write burst",
2696 },{
2697 .name = "throttling.bps-total-max",
2698 .type = QEMU_OPT_NUMBER,
2699 .help = "total bytes burst",
2700 },{
2701 .name = "throttling.bps-read-max",
2702 .type = QEMU_OPT_NUMBER,
2703 .help = "total bytes read burst",
2704 },{
2705 .name = "throttling.bps-write-max",
2706 .type = QEMU_OPT_NUMBER,
2707 .help = "total bytes write burst",
2708 },{
Benoît Canet2024c1d2013-09-02 14:14:41 +02002709 .name = "throttling.iops-size",
2710 .type = QEMU_OPT_NUMBER,
2711 .help = "when limiting by iops max size of an I/O in bytes",
2712 },{
Paolo Bonzini4d454572012-11-26 16:03:42 +01002713 .name = "copy-on-read",
2714 .type = QEMU_OPT_BOOL,
2715 .help = "copy read data from backing file into image file",
Peter Lieven465bee12014-05-18 00:58:19 +02002716 },{
2717 .name = "detect-zeroes",
2718 .type = QEMU_OPT_STRING,
2719 .help = "try to optimize zero writes (off, on, unmap)",
Paolo Bonzini4d454572012-11-26 16:03:42 +01002720 },
2721 { /* end of list */ }
2722 },
2723};
Kevin Wolf00063832013-03-15 10:35:07 +01002724
2725QemuOptsList qemu_drive_opts = {
2726 .name = "drive",
2727 .head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head),
2728 .desc = {
Kevin Wolf492fdc62013-06-19 13:44:17 +02002729 /*
2730 * no elements => accept any params
2731 * validation will happen later
2732 */
Kevin Wolf00063832013-03-15 10:35:07 +01002733 { /* end of list */ }
2734 },
2735};