blob: a41147749a028067d549c9f6b300f2e007237d37 [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.
8 */
9
10#include "block.h"
11#include "blockdev.h"
12#include "monitor.h"
13#include "qerror.h"
14#include "qemu-option.h"
15#include "qemu-config.h"
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +000016#include "qemu-objects.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020017#include "sysemu.h"
Ryan Harper9063f812010-11-12 11:07:13 -060018#include "block_int.h"
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -020019#include "qmp-commands.h"
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +000020#include "trace.h"
Anthony Liguoric9344f22012-02-03 11:22:35 -060021#include "arch_init.h"
Markus Armbruster666daa62010-06-02 18:48:27 +020022
Markus Armbrusterc9b62a72010-06-02 18:55:22 +020023static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
Markus Armbruster666daa62010-06-02 18:48:27 +020024
Markus Armbruster19609662011-01-28 11:21:39 +010025static const char *const if_name[IF_COUNT] = {
26 [IF_NONE] = "none",
27 [IF_IDE] = "ide",
28 [IF_SCSI] = "scsi",
29 [IF_FLOPPY] = "floppy",
30 [IF_PFLASH] = "pflash",
31 [IF_MTD] = "mtd",
32 [IF_SD] = "sd",
33 [IF_VIRTIO] = "virtio",
34 [IF_XEN] = "xen",
35};
36
37static const int if_max_devs[IF_COUNT] = {
Markus Armbruster27d6bf42011-01-28 11:21:40 +010038 /*
39 * Do not change these numbers! They govern how drive option
40 * index maps to unit and bus. That mapping is ABI.
41 *
42 * All controllers used to imlement if=T drives need to support
43 * if_max_devs[T] units, for any T with if_max_devs[T] != 0.
44 * Otherwise, some index values map to "impossible" bus, unit
45 * values.
46 *
47 * For instance, if you change [IF_SCSI] to 255, -drive
48 * if=scsi,index=12 no longer means bus=1,unit=5, but
49 * bus=0,unit=12. With an lsi53c895a controller (7 units max),
50 * the drive can't be set up. Regression.
51 */
52 [IF_IDE] = 2,
53 [IF_SCSI] = 7,
Markus Armbruster19609662011-01-28 11:21:39 +010054};
55
Markus Armbruster14bafc52010-06-25 08:09:10 +020056/*
57 * We automatically delete the drive when a device using it gets
58 * unplugged. Questionable feature, but we can't just drop it.
59 * Device models call blockdev_mark_auto_del() to schedule the
60 * automatic deletion, and generic qdev code calls blockdev_auto_del()
61 * when deletion is actually safe.
62 */
63void blockdev_mark_auto_del(BlockDriverState *bs)
64{
65 DriveInfo *dinfo = drive_get_by_blockdev(bs);
66
Paolo Bonzini12bde0e2012-03-30 13:17:10 +020067 if (bs->job) {
68 block_job_cancel(bs->job);
69 }
Ryan Harper0fc0f1f2010-12-08 10:05:00 -060070 if (dinfo) {
71 dinfo->auto_del = 1;
72 }
Markus Armbruster14bafc52010-06-25 08:09:10 +020073}
74
75void blockdev_auto_del(BlockDriverState *bs)
76{
77 DriveInfo *dinfo = drive_get_by_blockdev(bs);
78
Ryan Harper0fc0f1f2010-12-08 10:05:00 -060079 if (dinfo && dinfo->auto_del) {
Marcelo Tosatti84fb3922011-01-26 12:12:32 -020080 drive_put_ref(dinfo);
Markus Armbruster14bafc52010-06-25 08:09:10 +020081 }
82}
83
Markus Armbruster505a7fb2011-01-28 11:21:43 +010084static int drive_index_to_bus_id(BlockInterfaceType type, int index)
85{
86 int max_devs = if_max_devs[type];
87 return max_devs ? index / max_devs : 0;
88}
89
90static int drive_index_to_unit_id(BlockInterfaceType type, int index)
91{
92 int max_devs = if_max_devs[type];
93 return max_devs ? index % max_devs : index;
94}
95
Markus Armbruster2292dda2011-01-28 11:21:41 +010096QemuOpts *drive_def(const char *optstr)
97{
98 return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0);
99}
100
101QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
Markus Armbruster5645b0f2011-01-31 11:50:09 +0100102 const char *optstr)
Markus Armbruster666daa62010-06-02 18:48:27 +0200103{
Markus Armbruster666daa62010-06-02 18:48:27 +0200104 QemuOpts *opts;
Markus Armbruster2292dda2011-01-28 11:21:41 +0100105 char buf[32];
Markus Armbruster666daa62010-06-02 18:48:27 +0200106
Markus Armbruster2292dda2011-01-28 11:21:41 +0100107 opts = drive_def(optstr);
Markus Armbruster666daa62010-06-02 18:48:27 +0200108 if (!opts) {
109 return NULL;
110 }
Markus Armbruster2292dda2011-01-28 11:21:41 +0100111 if (type != IF_DEFAULT) {
112 qemu_opt_set(opts, "if", if_name[type]);
113 }
114 if (index >= 0) {
115 snprintf(buf, sizeof(buf), "%d", index);
116 qemu_opt_set(opts, "index", buf);
117 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200118 if (file)
119 qemu_opt_set(opts, "file", file);
120 return opts;
121}
122
123DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
124{
125 DriveInfo *dinfo;
126
127 /* seek interface, bus and unit */
128
129 QTAILQ_FOREACH(dinfo, &drives, next) {
130 if (dinfo->type == type &&
131 dinfo->bus == bus &&
132 dinfo->unit == unit)
133 return dinfo;
134 }
135
136 return NULL;
137}
138
Markus Armbrusterf1bd51a2011-01-28 11:21:44 +0100139DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
140{
141 return drive_get(type,
142 drive_index_to_bus_id(type, index),
143 drive_index_to_unit_id(type, index));
144}
145
Markus Armbruster666daa62010-06-02 18:48:27 +0200146int drive_get_max_bus(BlockInterfaceType type)
147{
148 int max_bus;
149 DriveInfo *dinfo;
150
151 max_bus = -1;
152 QTAILQ_FOREACH(dinfo, &drives, next) {
153 if(dinfo->type == type &&
154 dinfo->bus > max_bus)
155 max_bus = dinfo->bus;
156 }
157 return max_bus;
158}
159
Markus Armbruster13839972011-01-28 11:21:37 +0100160/* Get a block device. This should only be used for single-drive devices
161 (e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
162 appropriate bus. */
163DriveInfo *drive_get_next(BlockInterfaceType type)
164{
165 static int next_block_unit[IF_COUNT];
166
167 return drive_get(type, 0, next_block_unit[type]++);
168}
169
Markus Armbrustere4700e52010-06-24 17:25:32 +0200170DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
Markus Armbruster666daa62010-06-02 18:48:27 +0200171{
172 DriveInfo *dinfo;
173
174 QTAILQ_FOREACH(dinfo, &drives, next) {
Markus Armbrustere4700e52010-06-24 17:25:32 +0200175 if (dinfo->bdrv == bs) {
176 return dinfo;
177 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200178 }
Markus Armbrustere4700e52010-06-24 17:25:32 +0200179 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200180}
181
Markus Armbruster666daa62010-06-02 18:48:27 +0200182static void bdrv_format_print(void *opaque, const char *name)
183{
Markus Armbruster807105a2011-01-17 19:31:27 +0100184 error_printf(" %s", name);
Markus Armbruster666daa62010-06-02 18:48:27 +0200185}
186
Marcelo Tosatti84fb3922011-01-26 12:12:32 -0200187static void drive_uninit(DriveInfo *dinfo)
Markus Armbruster666daa62010-06-02 18:48:27 +0200188{
189 qemu_opts_del(dinfo->opts);
190 bdrv_delete(dinfo->bdrv);
Anthony Liguori7267c092011-08-20 22:09:37 -0500191 g_free(dinfo->id);
Markus Armbruster666daa62010-06-02 18:48:27 +0200192 QTAILQ_REMOVE(&drives, dinfo, next);
Anthony Liguori7267c092011-08-20 22:09:37 -0500193 g_free(dinfo);
Markus Armbruster666daa62010-06-02 18:48:27 +0200194}
195
Marcelo Tosatti84fb3922011-01-26 12:12:32 -0200196void drive_put_ref(DriveInfo *dinfo)
197{
198 assert(dinfo->refcount);
199 if (--dinfo->refcount == 0) {
200 drive_uninit(dinfo);
201 }
202}
203
204void drive_get_ref(DriveInfo *dinfo)
205{
206 dinfo->refcount++;
207}
208
Stefan Hajnocziaa398a52012-01-18 14:40:50 +0000209typedef struct {
210 QEMUBH *bh;
211 DriveInfo *dinfo;
212} DrivePutRefBH;
213
214static void drive_put_ref_bh(void *opaque)
215{
216 DrivePutRefBH *s = opaque;
217
218 drive_put_ref(s->dinfo);
219 qemu_bh_delete(s->bh);
220 g_free(s);
221}
222
223/*
224 * Release a drive reference in a BH
225 *
226 * It is not possible to use drive_put_ref() from a callback function when the
227 * callers still need the drive. In such cases we schedule a BH to release the
228 * reference.
229 */
230static void drive_put_ref_bh_schedule(DriveInfo *dinfo)
231{
232 DrivePutRefBH *s;
233
234 s = g_new(DrivePutRefBH, 1);
235 s->bh = qemu_bh_new(drive_put_ref_bh, s);
236 s->dinfo = dinfo;
237 qemu_bh_schedule(s->bh);
238}
239
Markus Armbruster666daa62010-06-02 18:48:27 +0200240static int parse_block_error_action(const char *buf, int is_read)
241{
242 if (!strcmp(buf, "ignore")) {
243 return BLOCK_ERR_IGNORE;
244 } else if (!is_read && !strcmp(buf, "enospc")) {
245 return BLOCK_ERR_STOP_ENOSPC;
246 } else if (!strcmp(buf, "stop")) {
247 return BLOCK_ERR_STOP_ANY;
248 } else if (!strcmp(buf, "report")) {
249 return BLOCK_ERR_REPORT;
250 } else {
Markus Armbruster807105a2011-01-17 19:31:27 +0100251 error_report("'%s' invalid %s error action",
252 buf, is_read ? "read" : "write");
Markus Armbruster666daa62010-06-02 18:48:27 +0200253 return -1;
254 }
255}
256
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800257static bool do_check_io_limits(BlockIOLimit *io_limits)
258{
259 bool bps_flag;
260 bool iops_flag;
261
262 assert(io_limits);
263
264 bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
265 && ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
266 || (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
267 iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
268 && ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
269 || (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
270 if (bps_flag || iops_flag) {
271 return false;
272 }
273
274 return true;
275}
276
Markus Armbruster319ae522011-01-28 11:21:46 +0100277DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
Markus Armbruster666daa62010-06-02 18:48:27 +0200278{
279 const char *buf;
280 const char *file = NULL;
281 char devname[128];
282 const char *serial;
283 const char *mediastr = "";
284 BlockInterfaceType type;
285 enum { MEDIA_DISK, MEDIA_CDROM } media;
286 int bus_id, unit_id;
287 int cyls, heads, secs, translation;
288 BlockDriver *drv = NULL;
289 int max_devs;
290 int index;
291 int ro = 0;
292 int bdrv_flags = 0;
293 int on_read_error, on_write_error;
294 const char *devaddr;
295 DriveInfo *dinfo;
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800296 BlockIOLimit io_limits;
Markus Armbruster666daa62010-06-02 18:48:27 +0200297 int snapshot = 0;
Stefan Hajnoczifb0490f2011-11-17 13:40:32 +0000298 bool copy_on_read;
Markus Armbruster666daa62010-06-02 18:48:27 +0200299 int ret;
300
Markus Armbruster666daa62010-06-02 18:48:27 +0200301 translation = BIOS_ATA_TRANSLATION_AUTO;
Markus Armbruster666daa62010-06-02 18:48:27 +0200302 media = MEDIA_DISK;
303
304 /* extract parameters */
305 bus_id = qemu_opt_get_number(opts, "bus", 0);
306 unit_id = qemu_opt_get_number(opts, "unit", -1);
307 index = qemu_opt_get_number(opts, "index", -1);
308
309 cyls = qemu_opt_get_number(opts, "cyls", 0);
310 heads = qemu_opt_get_number(opts, "heads", 0);
311 secs = qemu_opt_get_number(opts, "secs", 0);
312
313 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
314 ro = qemu_opt_get_bool(opts, "readonly", 0);
Stefan Hajnoczifb0490f2011-11-17 13:40:32 +0000315 copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false);
Markus Armbruster666daa62010-06-02 18:48:27 +0200316
317 file = qemu_opt_get(opts, "file");
318 serial = qemu_opt_get(opts, "serial");
319
320 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
321 pstrcpy(devname, sizeof(devname), buf);
Markus Armbruster19609662011-01-28 11:21:39 +0100322 for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++)
323 ;
324 if (type == IF_COUNT) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100325 error_report("unsupported bus type '%s'", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200326 return NULL;
327 }
Luiz Capitulino2d3999f2011-07-01 10:46:12 -0300328 } else {
329 type = default_to_scsi ? IF_SCSI : IF_IDE;
330 pstrcpy(devname, sizeof(devname), if_name[type]);
Markus Armbruster666daa62010-06-02 18:48:27 +0200331 }
Luiz Capitulino2d3999f2011-07-01 10:46:12 -0300332
Markus Armbruster19609662011-01-28 11:21:39 +0100333 max_devs = if_max_devs[type];
Markus Armbruster666daa62010-06-02 18:48:27 +0200334
335 if (cyls || heads || secs) {
336 if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100337 error_report("invalid physical cyls number");
Markus Armbruster666daa62010-06-02 18:48:27 +0200338 return NULL;
339 }
340 if (heads < 1 || (type == IF_IDE && heads > 16)) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100341 error_report("invalid physical heads number");
Markus Armbruster666daa62010-06-02 18:48:27 +0200342 return NULL;
343 }
344 if (secs < 1 || (type == IF_IDE && secs > 63)) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100345 error_report("invalid physical secs number");
Markus Armbruster666daa62010-06-02 18:48:27 +0200346 return NULL;
347 }
348 }
349
350 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
351 if (!cyls) {
Markus Armbrustere4080f92011-06-22 14:03:57 +0200352 error_report("'%s' trans must be used with cyls, heads and secs",
Markus Armbruster807105a2011-01-17 19:31:27 +0100353 buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200354 return NULL;
355 }
356 if (!strcmp(buf, "none"))
357 translation = BIOS_ATA_TRANSLATION_NONE;
358 else if (!strcmp(buf, "lba"))
359 translation = BIOS_ATA_TRANSLATION_LBA;
360 else if (!strcmp(buf, "auto"))
361 translation = BIOS_ATA_TRANSLATION_AUTO;
362 else {
Markus Armbruster807105a2011-01-17 19:31:27 +0100363 error_report("'%s' invalid translation type", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200364 return NULL;
365 }
366 }
367
368 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
369 if (!strcmp(buf, "disk")) {
370 media = MEDIA_DISK;
371 } else if (!strcmp(buf, "cdrom")) {
372 if (cyls || secs || heads) {
Luiz Capitulinoe7ff8f02011-07-01 10:46:13 -0300373 error_report("CHS can't be set with media=%s", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200374 return NULL;
375 }
376 media = MEDIA_CDROM;
377 } else {
Markus Armbruster807105a2011-01-17 19:31:27 +0100378 error_report("'%s' invalid media", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200379 return NULL;
380 }
381 }
382
383 if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
Stefan Hajnoczic3993cd2011-08-04 12:26:51 +0100384 if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) {
385 error_report("invalid cache option");
386 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200387 }
388 }
389
390#ifdef CONFIG_LINUX_AIO
391 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
392 if (!strcmp(buf, "native")) {
393 bdrv_flags |= BDRV_O_NATIVE_AIO;
394 } else if (!strcmp(buf, "threads")) {
395 /* this is the default */
396 } else {
Markus Armbruster807105a2011-01-17 19:31:27 +0100397 error_report("invalid aio option");
Markus Armbruster666daa62010-06-02 18:48:27 +0200398 return NULL;
399 }
400 }
401#endif
402
403 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
404 if (strcmp(buf, "?") == 0) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100405 error_printf("Supported formats:");
406 bdrv_iterate_format(bdrv_format_print, NULL);
407 error_printf("\n");
408 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200409 }
410 drv = bdrv_find_whitelisted_format(buf);
411 if (!drv) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100412 error_report("'%s' invalid format", buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200413 return NULL;
414 }
415 }
416
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800417 /* disk I/O throttling */
418 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] =
419 qemu_opt_get_number(opts, "bps", 0);
420 io_limits.bps[BLOCK_IO_LIMIT_READ] =
421 qemu_opt_get_number(opts, "bps_rd", 0);
422 io_limits.bps[BLOCK_IO_LIMIT_WRITE] =
423 qemu_opt_get_number(opts, "bps_wr", 0);
424 io_limits.iops[BLOCK_IO_LIMIT_TOTAL] =
425 qemu_opt_get_number(opts, "iops", 0);
426 io_limits.iops[BLOCK_IO_LIMIT_READ] =
427 qemu_opt_get_number(opts, "iops_rd", 0);
428 io_limits.iops[BLOCK_IO_LIMIT_WRITE] =
429 qemu_opt_get_number(opts, "iops_wr", 0);
430
431 if (!do_check_io_limits(&io_limits)) {
432 error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
433 "cannot be used at the same time");
434 return NULL;
435 }
436
Markus Armbruster666daa62010-06-02 18:48:27 +0200437 on_write_error = BLOCK_ERR_STOP_ENOSPC;
438 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
439 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100440 error_report("werror is not supported by this bus type");
Markus Armbruster666daa62010-06-02 18:48:27 +0200441 return NULL;
442 }
443
444 on_write_error = parse_block_error_action(buf, 0);
445 if (on_write_error < 0) {
446 return NULL;
447 }
448 }
449
450 on_read_error = BLOCK_ERR_REPORT;
451 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
Kevin Wolf5dba48a2010-10-25 14:52:21 +0200452 if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100453 error_report("rerror is not supported by this bus type");
Markus Armbruster666daa62010-06-02 18:48:27 +0200454 return NULL;
455 }
456
457 on_read_error = parse_block_error_action(buf, 1);
458 if (on_read_error < 0) {
459 return NULL;
460 }
461 }
462
463 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
464 if (type != IF_VIRTIO) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100465 error_report("addr is not supported by this bus type");
Markus Armbruster666daa62010-06-02 18:48:27 +0200466 return NULL;
467 }
468 }
469
470 /* compute bus and unit according index */
471
472 if (index != -1) {
473 if (bus_id != 0 || unit_id != -1) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100474 error_report("index cannot be used with bus and unit");
Markus Armbruster666daa62010-06-02 18:48:27 +0200475 return NULL;
476 }
Markus Armbruster505a7fb2011-01-28 11:21:43 +0100477 bus_id = drive_index_to_bus_id(type, index);
478 unit_id = drive_index_to_unit_id(type, index);
Markus Armbruster666daa62010-06-02 18:48:27 +0200479 }
480
481 /* if user doesn't specify a unit_id,
482 * try to find the first free
483 */
484
485 if (unit_id == -1) {
486 unit_id = 0;
487 while (drive_get(type, bus_id, unit_id) != NULL) {
488 unit_id++;
489 if (max_devs && unit_id >= max_devs) {
490 unit_id -= max_devs;
491 bus_id++;
492 }
493 }
494 }
495
496 /* check unit id */
497
498 if (max_devs && unit_id >= max_devs) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100499 error_report("unit %d too big (max is %d)",
500 unit_id, max_devs - 1);
Markus Armbruster666daa62010-06-02 18:48:27 +0200501 return NULL;
502 }
503
504 /*
Markus Armbruster4e5d9b52011-01-28 11:21:45 +0100505 * catch multiple definitions
Markus Armbruster666daa62010-06-02 18:48:27 +0200506 */
507
508 if (drive_get(type, bus_id, unit_id) != NULL) {
Markus Armbruster4e5d9b52011-01-28 11:21:45 +0100509 error_report("drive with bus=%d, unit=%d (index=%d) exists",
510 bus_id, unit_id, index);
Markus Armbruster666daa62010-06-02 18:48:27 +0200511 return NULL;
512 }
513
514 /* init */
515
Anthony Liguori7267c092011-08-20 22:09:37 -0500516 dinfo = g_malloc0(sizeof(*dinfo));
Markus Armbruster666daa62010-06-02 18:48:27 +0200517 if ((buf = qemu_opts_id(opts)) != NULL) {
Anthony Liguori7267c092011-08-20 22:09:37 -0500518 dinfo->id = g_strdup(buf);
Markus Armbruster666daa62010-06-02 18:48:27 +0200519 } else {
520 /* no id supplied -> create one */
Anthony Liguori7267c092011-08-20 22:09:37 -0500521 dinfo->id = g_malloc0(32);
Markus Armbruster666daa62010-06-02 18:48:27 +0200522 if (type == IF_IDE || type == IF_SCSI)
523 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
524 if (max_devs)
525 snprintf(dinfo->id, 32, "%s%i%s%i",
526 devname, bus_id, mediastr, unit_id);
527 else
528 snprintf(dinfo->id, 32, "%s%s%i",
529 devname, mediastr, unit_id);
530 }
531 dinfo->bdrv = bdrv_new(dinfo->id);
532 dinfo->devaddr = devaddr;
533 dinfo->type = type;
534 dinfo->bus = bus_id;
535 dinfo->unit = unit_id;
Markus Armbruster666daa62010-06-02 18:48:27 +0200536 dinfo->opts = opts;
Marcelo Tosatti84fb3922011-01-26 12:12:32 -0200537 dinfo->refcount = 1;
Floris Bosaa2c91b2012-03-12 21:05:10 +0100538 if (serial) {
539 pstrcpy(dinfo->serial, sizeof(dinfo->serial), serial);
540 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200541 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
542
Markus Armbrusterabd7f682010-06-02 18:55:17 +0200543 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
544
Zhi Yong Wu0563e192011-11-03 16:57:25 +0800545 /* disk I/O throttling */
546 bdrv_set_io_limits(dinfo->bdrv, &io_limits);
547
Markus Armbruster666daa62010-06-02 18:48:27 +0200548 switch(type) {
549 case IF_IDE:
550 case IF_SCSI:
551 case IF_XEN:
552 case IF_NONE:
553 switch(media) {
554 case MEDIA_DISK:
555 if (cyls != 0) {
556 bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
557 bdrv_set_translation_hint(dinfo->bdrv, translation);
558 }
559 break;
560 case MEDIA_CDROM:
Markus Armbruster95b5edc2011-05-16 15:04:56 +0200561 dinfo->media_cd = 1;
Markus Armbruster666daa62010-06-02 18:48:27 +0200562 break;
563 }
564 break;
565 case IF_SD:
Markus Armbruster666daa62010-06-02 18:48:27 +0200566 case IF_FLOPPY:
Markus Armbruster666daa62010-06-02 18:48:27 +0200567 case IF_PFLASH:
568 case IF_MTD:
569 break;
570 case IF_VIRTIO:
571 /* add virtio block device */
Gerd Hoffmann3329f072010-08-20 13:52:01 +0200572 opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
Anthony Liguorieeb9c1b2012-02-03 11:13:30 -0600573 if (arch_type == QEMU_ARCH_S390X) {
574 qemu_opt_set(opts, "driver", "virtio-blk-s390");
575 } else {
576 qemu_opt_set(opts, "driver", "virtio-blk-pci");
577 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200578 qemu_opt_set(opts, "drive", dinfo->id);
579 if (devaddr)
580 qemu_opt_set(opts, "addr", devaddr);
581 break;
Markus Armbruster2292dda2011-01-28 11:21:41 +0100582 default:
Markus Armbruster666daa62010-06-02 18:48:27 +0200583 abort();
584 }
Markus Armbrusterdd5b0d72010-05-11 15:36:46 +0200585 if (!file || !*file) {
Markus Armbruster319ae522011-01-28 11:21:46 +0100586 return dinfo;
Markus Armbruster666daa62010-06-02 18:48:27 +0200587 }
588 if (snapshot) {
589 /* always use cache=unsafe with snapshot */
590 bdrv_flags &= ~BDRV_O_CACHE_MASK;
591 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
592 }
593
Stefan Hajnoczifb0490f2011-11-17 13:40:32 +0000594 if (copy_on_read) {
595 bdrv_flags |= BDRV_O_COPY_ON_READ;
596 }
597
Benoît Caneted9d4202012-03-23 08:36:50 +0100598 if (runstate_check(RUN_STATE_INMIGRATE)) {
599 bdrv_flags |= BDRV_O_INCOMING;
600 }
601
Markus Armbruster666daa62010-06-02 18:48:27 +0200602 if (media == MEDIA_CDROM) {
603 /* CDROM is fine for any interface, don't check. */
604 ro = 1;
605 } else if (ro == 1) {
Jordan Justen1e9eb782012-02-21 23:18:48 -0800606 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
607 type != IF_NONE && type != IF_PFLASH) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100608 error_report("readonly not supported by this bus type");
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100609 goto err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200610 }
611 }
612
613 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
614
615 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
616 if (ret < 0) {
Markus Armbruster807105a2011-01-17 19:31:27 +0100617 error_report("could not open disk image %s: %s",
618 file, strerror(-ret));
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100619 goto err;
Markus Armbruster666daa62010-06-02 18:48:27 +0200620 }
621
622 if (bdrv_key_required(dinfo->bdrv))
623 autostart = 0;
Markus Armbruster666daa62010-06-02 18:48:27 +0200624 return dinfo;
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100625
626err:
627 bdrv_delete(dinfo->bdrv);
Anthony Liguori7267c092011-08-20 22:09:37 -0500628 g_free(dinfo->id);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100629 QTAILQ_REMOVE(&drives, dinfo, next);
Anthony Liguori7267c092011-08-20 22:09:37 -0500630 g_free(dinfo);
Markus Armbrustera9ae2bf2011-02-08 15:12:39 +0100631 return NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200632}
633
634void do_commit(Monitor *mon, const QDict *qdict)
635{
Markus Armbruster666daa62010-06-02 18:48:27 +0200636 const char *device = qdict_get_str(qdict, "device");
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +0200637 BlockDriverState *bs;
Stefan Hajnoczie8877492012-03-05 18:10:11 +0000638 int ret;
Markus Armbruster666daa62010-06-02 18:48:27 +0200639
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +0200640 if (!strcmp(device, "all")) {
Stefan Hajnoczie8877492012-03-05 18:10:11 +0000641 ret = bdrv_commit_all();
642 if (ret == -EBUSY) {
643 qerror_report(QERR_DEVICE_IN_USE, device);
644 return;
645 }
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +0200646 } else {
647 bs = bdrv_find(device);
Markus Armbrusterac59eb92010-06-02 18:55:19 +0200648 if (!bs) {
649 qerror_report(QERR_DEVICE_NOT_FOUND, device);
650 return;
Markus Armbruster6ab4b5a2010-06-02 18:55:18 +0200651 }
Stefan Hajnoczi2d3735d2012-01-18 14:40:41 +0000652 ret = bdrv_commit(bs);
653 if (ret == -EBUSY) {
654 qerror_report(QERR_DEVICE_IN_USE, device);
655 return;
656 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200657 }
658}
659
Paolo Bonzini6cc2a412012-03-06 18:55:59 +0100660static void blockdev_do_action(int kind, void *data, Error **errp)
661{
662 BlockdevAction action;
663 BlockdevActionList list;
664
665 action.kind = kind;
666 action.data = data;
667 list.value = &action;
668 list.next = NULL;
669 qmp_transaction(&list, errp);
670}
671
Luiz Capitulino6106e242011-11-25 16:15:19 -0200672void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file,
673 bool has_format, const char *format,
Paolo Bonzini6cc2a412012-03-06 18:55:59 +0100674 bool has_mode, enum NewImageMode mode,
Luiz Capitulino6106e242011-11-25 16:15:19 -0200675 Error **errp)
Jes Sorensenf8882562010-12-16 13:52:16 +0100676{
Paolo Bonzini6cc2a412012-03-06 18:55:59 +0100677 BlockdevSnapshot snapshot = {
678 .device = (char *) device,
679 .snapshot_file = (char *) snapshot_file,
680 .has_format = has_format,
681 .format = (char *) format,
682 .has_mode = has_mode,
683 .mode = mode,
684 };
685 blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot,
686 errp);
Jes Sorensenf8882562010-12-16 13:52:16 +0100687}
688
Jeff Cody8802d1f2012-02-28 15:54:06 -0500689
690/* New and old BlockDriverState structs for group snapshots */
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100691typedef struct BlkTransactionStates {
Jeff Cody8802d1f2012-02-28 15:54:06 -0500692 BlockDriverState *old_bs;
693 BlockDriverState *new_bs;
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100694 QSIMPLEQ_ENTRY(BlkTransactionStates) entry;
695} BlkTransactionStates;
Jeff Cody8802d1f2012-02-28 15:54:06 -0500696
697/*
698 * 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
699 * then we do not pivot any of the devices in the group, and abandon the
700 * snapshots
701 */
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100702void qmp_transaction(BlockdevActionList *dev_list, Error **errp)
Jeff Cody8802d1f2012-02-28 15:54:06 -0500703{
704 int ret = 0;
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100705 BlockdevActionList *dev_entry = dev_list;
706 BlkTransactionStates *states, *next;
Jeff Cody8802d1f2012-02-28 15:54:06 -0500707
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100708 QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states;
Jeff Cody8802d1f2012-02-28 15:54:06 -0500709 QSIMPLEQ_INIT(&snap_bdrv_states);
710
711 /* drain all i/o before any snapshots */
712 bdrv_drain_all();
713
714 /* We don't do anything in this loop that commits us to the snapshot */
715 while (NULL != dev_entry) {
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100716 BlockdevAction *dev_info = NULL;
717 BlockDriver *proto_drv;
718 BlockDriver *drv;
719 int flags;
Paolo Bonzinibc8b0942012-03-06 18:55:58 +0100720 enum NewImageMode mode;
721 const char *new_image_file;
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100722 const char *device;
723 const char *format = "qcow2";
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100724
Jeff Cody8802d1f2012-02-28 15:54:06 -0500725 dev_info = dev_entry->value;
726 dev_entry = dev_entry->next;
727
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100728 states = g_malloc0(sizeof(BlkTransactionStates));
Jeff Cody8802d1f2012-02-28 15:54:06 -0500729 QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry);
730
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100731 switch (dev_info->kind) {
732 case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
733 device = dev_info->blockdev_snapshot_sync->device;
Paolo Bonzinibc8b0942012-03-06 18:55:58 +0100734 if (!dev_info->blockdev_snapshot_sync->has_mode) {
735 dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS;
736 }
737 new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file;
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100738 if (dev_info->blockdev_snapshot_sync->has_format) {
739 format = dev_info->blockdev_snapshot_sync->format;
740 }
Paolo Bonzinibc8b0942012-03-06 18:55:58 +0100741 mode = dev_info->blockdev_snapshot_sync->mode;
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100742 break;
743 default:
744 abort();
745 }
Jeff Cody8802d1f2012-02-28 15:54:06 -0500746
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100747 drv = bdrv_find_format(format);
748 if (!drv) {
749 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
750 goto delete_and_fail;
751 }
752
753 states->old_bs = bdrv_find(device);
Jeff Cody8802d1f2012-02-28 15:54:06 -0500754 if (!states->old_bs) {
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100755 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
Jeff Cody8802d1f2012-02-28 15:54:06 -0500756 goto delete_and_fail;
757 }
758
759 if (bdrv_in_use(states->old_bs)) {
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100760 error_set(errp, QERR_DEVICE_IN_USE, device);
Jeff Cody8802d1f2012-02-28 15:54:06 -0500761 goto delete_and_fail;
762 }
763
764 if (!bdrv_is_read_only(states->old_bs) &&
765 bdrv_is_inserted(states->old_bs)) {
766
767 if (bdrv_flush(states->old_bs)) {
768 error_set(errp, QERR_IO_ERROR);
769 goto delete_and_fail;
770 }
771 }
772
Jeff Cody8802d1f2012-02-28 15:54:06 -0500773 flags = states->old_bs->open_flags;
774
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100775 proto_drv = bdrv_find_protocol(new_image_file);
Jeff Cody8802d1f2012-02-28 15:54:06 -0500776 if (!proto_drv) {
777 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
778 goto delete_and_fail;
779 }
780
781 /* create new image w/backing file */
Paolo Bonzinibc8b0942012-03-06 18:55:58 +0100782 if (mode != NEW_IMAGE_MODE_EXISTING) {
783 ret = bdrv_img_create(new_image_file, format,
784 states->old_bs->filename,
785 states->old_bs->drv->format_name,
786 NULL, -1, flags);
787 if (ret) {
788 error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file);
789 goto delete_and_fail;
790 }
Jeff Cody8802d1f2012-02-28 15:54:06 -0500791 }
792
793 /* We will manually add the backing_hd field to the bs later */
794 states->new_bs = bdrv_new("");
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100795 ret = bdrv_open(states->new_bs, new_image_file,
Jeff Cody8802d1f2012-02-28 15:54:06 -0500796 flags | BDRV_O_NO_BACKING, drv);
797 if (ret != 0) {
Paolo Bonzini52e7c242012-03-06 18:55:57 +0100798 error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file);
Jeff Cody8802d1f2012-02-28 15:54:06 -0500799 goto delete_and_fail;
800 }
801 }
802
803
804 /* Now we are going to do the actual pivot. Everything up to this point
805 * is reversible, but we are committed at this point */
806 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
807 /* This removes our old bs from the bdrv_states, and adds the new bs */
808 bdrv_append(states->new_bs, states->old_bs);
809 }
810
811 /* success */
812 goto exit;
813
814delete_and_fail:
815 /*
816 * failure, and it is all-or-none; abandon each new bs, and keep using
817 * the original bs for all images
818 */
819 QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) {
820 if (states->new_bs) {
821 bdrv_delete(states->new_bs);
822 }
823 }
824exit:
Paolo Bonzini622d2412012-03-06 18:55:54 +0100825 QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) {
Jeff Cody8802d1f2012-02-28 15:54:06 -0500826 g_free(states);
827 }
828 return;
829}
830
831
Luiz Capitulino92d48552011-12-07 15:47:23 -0200832static void eject_device(BlockDriverState *bs, int force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200833{
Stefan Hajnoczi2d3735d2012-01-18 14:40:41 +0000834 if (bdrv_in_use(bs)) {
835 error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs));
836 return;
837 }
Markus Armbruster2c6942f2011-09-06 18:58:51 +0200838 if (!bdrv_dev_has_removable_media(bs)) {
Luiz Capitulino92d48552011-12-07 15:47:23 -0200839 error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs));
840 return;
Markus Armbrusterea8f9422011-07-20 18:23:35 +0200841 }
Luiz Capitulino92d48552011-12-07 15:47:23 -0200842
Paolo Bonzini025ccaa2011-11-07 17:50:13 +0100843 if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
844 bdrv_dev_eject_request(bs, force);
845 if (!force) {
Luiz Capitulino92d48552011-12-07 15:47:23 -0200846 error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
847 return;
Paolo Bonzini025ccaa2011-11-07 17:50:13 +0100848 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200849 }
Luiz Capitulino92d48552011-12-07 15:47:23 -0200850
Eduardo Habkost3b5276b2010-06-01 19:12:19 -0300851 bdrv_close(bs);
Markus Armbruster666daa62010-06-02 18:48:27 +0200852}
853
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -0200854void qmp_eject(const char *device, bool has_force, bool force, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200855{
856 BlockDriverState *bs;
Markus Armbruster666daa62010-06-02 18:48:27 +0200857
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -0200858 bs = bdrv_find(device);
Markus Armbruster666daa62010-06-02 18:48:27 +0200859 if (!bs) {
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -0200860 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
861 return;
Markus Armbruster666daa62010-06-02 18:48:27 +0200862 }
Luiz Capitulino92d48552011-12-07 15:47:23 -0200863
Luiz Capitulinoc245b6a2011-12-07 16:02:36 -0200864 eject_device(bs, force, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +0200865}
866
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -0200867void qmp_block_passwd(const char *device, const char *password, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200868{
869 BlockDriverState *bs;
870 int err;
871
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -0200872 bs = bdrv_find(device);
Markus Armbruster666daa62010-06-02 18:48:27 +0200873 if (!bs) {
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -0200874 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
875 return;
Markus Armbruster666daa62010-06-02 18:48:27 +0200876 }
877
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -0200878 err = bdrv_set_key(bs, password);
Markus Armbruster666daa62010-06-02 18:48:27 +0200879 if (err == -EINVAL) {
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -0200880 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
881 return;
Markus Armbruster666daa62010-06-02 18:48:27 +0200882 } else if (err < 0) {
Luiz Capitulinoa4dea8a2011-11-23 13:28:21 -0200883 error_set(errp, QERR_INVALID_PASSWORD);
884 return;
Markus Armbruster666daa62010-06-02 18:48:27 +0200885 }
Markus Armbruster666daa62010-06-02 18:48:27 +0200886}
887
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200888static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename,
889 int bdrv_flags, BlockDriver *drv,
890 const char *password, Error **errp)
891{
892 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
893 error_set(errp, QERR_OPEN_FILE_FAILED, filename);
894 return;
895 }
896
897 if (bdrv_key_required(bs)) {
898 if (password) {
899 if (bdrv_set_key(bs, password) < 0) {
900 error_set(errp, QERR_INVALID_PASSWORD);
901 }
902 } else {
903 error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs),
904 bdrv_get_encrypted_filename(bs));
905 }
906 } else if (password) {
907 error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
908 }
909}
910
911void qmp_change_blockdev(const char *device, const char *filename,
912 bool has_format, const char *format, Error **errp)
Markus Armbruster666daa62010-06-02 18:48:27 +0200913{
914 BlockDriverState *bs;
915 BlockDriver *drv = NULL;
916 int bdrv_flags;
Luiz Capitulino92d48552011-12-07 15:47:23 -0200917 Error *err = NULL;
Markus Armbruster666daa62010-06-02 18:48:27 +0200918
919 bs = bdrv_find(device);
920 if (!bs) {
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200921 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
922 return;
Markus Armbruster666daa62010-06-02 18:48:27 +0200923 }
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200924
925 if (format) {
926 drv = bdrv_find_whitelisted_format(format);
Markus Armbruster666daa62010-06-02 18:48:27 +0200927 if (!drv) {
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200928 error_set(errp, QERR_INVALID_BLOCK_FORMAT, format);
929 return;
Markus Armbruster666daa62010-06-02 18:48:27 +0200930 }
931 }
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200932
Luiz Capitulino92d48552011-12-07 15:47:23 -0200933 eject_device(bs, 0, &err);
934 if (error_is_set(&err)) {
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200935 error_propagate(errp, err);
936 return;
Markus Armbruster666daa62010-06-02 18:48:27 +0200937 }
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200938
Markus Armbruster528f7662010-06-25 15:26:48 +0200939 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
Blue Swirl199630b2010-07-25 20:49:34 +0000940 bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
Luiz Capitulino333a96e2011-12-08 11:13:50 -0200941
942 qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
Markus Armbruster666daa62010-06-02 18:48:27 +0200943}
Ryan Harper9063f812010-11-12 11:07:13 -0600944
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800945/* throttling disk I/O limits */
Luiz Capitulino80047da2011-12-14 16:49:14 -0200946void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd,
947 int64_t bps_wr, int64_t iops, int64_t iops_rd,
948 int64_t iops_wr, Error **errp)
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800949{
950 BlockIOLimit io_limits;
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800951 BlockDriverState *bs;
952
Luiz Capitulino80047da2011-12-14 16:49:14 -0200953 bs = bdrv_find(device);
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800954 if (!bs) {
Luiz Capitulino80047da2011-12-14 16:49:14 -0200955 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
956 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800957 }
958
Luiz Capitulino80047da2011-12-14 16:49:14 -0200959 io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps;
960 io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd;
961 io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr;
962 io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops;
963 io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd;
964 io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr;
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800965
966 if (!do_check_io_limits(&io_limits)) {
Luiz Capitulino80047da2011-12-14 16:49:14 -0200967 error_set(errp, QERR_INVALID_PARAMETER_COMBINATION);
968 return;
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800969 }
970
971 bs->io_limits = io_limits;
972 bs->slice_time = BLOCK_IO_SLICE_TIME;
973
974 if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
975 bdrv_io_limits_enable(bs);
976 } else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) {
977 bdrv_io_limits_disable(bs);
978 } else {
979 if (bs->block_timer) {
980 qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock));
981 }
982 }
Zhi Yong Wu727f0052011-11-08 13:00:31 +0800983}
984
Ryan Harper9063f812010-11-12 11:07:13 -0600985int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
986{
987 const char *id = qdict_get_str(qdict, "id");
988 BlockDriverState *bs;
Ryan Harper9063f812010-11-12 11:07:13 -0600989
990 bs = bdrv_find(id);
991 if (!bs) {
992 qerror_report(QERR_DEVICE_NOT_FOUND, id);
993 return -1;
994 }
Marcelo Tosatti85916752011-01-26 12:12:35 -0200995 if (bdrv_in_use(bs)) {
996 qerror_report(QERR_DEVICE_IN_USE, id);
997 return -1;
998 }
Ryan Harper9063f812010-11-12 11:07:13 -0600999
1000 /* quiesce block driver; prevent further io */
Stefan Hajnoczi922453b2011-11-30 12:23:43 +00001001 bdrv_drain_all();
Ryan Harper9063f812010-11-12 11:07:13 -06001002 bdrv_flush(bs);
1003 bdrv_close(bs);
1004
Markus Armbrusterfa879d62011-08-03 15:07:40 +02001005 /* if we have a device attached to this BlockDriverState
Ryan Harperd22b2f42011-03-29 20:51:47 -05001006 * then we need to make the drive anonymous until the device
1007 * can be removed. If this is a drive with no device backing
1008 * then we can just get rid of the block driver state right here.
1009 */
Markus Armbrusterfa879d62011-08-03 15:07:40 +02001010 if (bdrv_get_attached_dev(bs)) {
Ryan Harperd22b2f42011-03-29 20:51:47 -05001011 bdrv_make_anon(bs);
1012 } else {
1013 drive_uninit(drive_get_by_blockdev(bs));
Ryan Harper9063f812010-11-12 11:07:13 -06001014 }
1015
Ryan Harper9063f812010-11-12 11:07:13 -06001016 return 0;
1017}
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001018
Luiz Capitulino5e7caac2011-11-25 14:57:10 -02001019void qmp_block_resize(const char *device, int64_t size, Error **errp)
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001020{
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001021 BlockDriverState *bs;
1022
1023 bs = bdrv_find(device);
1024 if (!bs) {
Luiz Capitulino5e7caac2011-11-25 14:57:10 -02001025 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1026 return;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001027 }
1028
1029 if (size < 0) {
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00001030 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size");
Luiz Capitulino5e7caac2011-11-25 14:57:10 -02001031 return;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001032 }
1033
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00001034 switch (bdrv_truncate(bs, size)) {
1035 case 0:
1036 break;
1037 case -ENOMEDIUM:
1038 error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device);
1039 break;
1040 case -ENOTSUP:
1041 error_set(errp, QERR_UNSUPPORTED);
1042 break;
1043 case -EACCES:
1044 error_set(errp, QERR_DEVICE_IS_READ_ONLY, device);
1045 break;
1046 case -EBUSY:
1047 error_set(errp, QERR_DEVICE_IN_USE, device);
1048 break;
1049 default:
Luiz Capitulino5e7caac2011-11-25 14:57:10 -02001050 error_set(errp, QERR_UNDEFINED_ERROR);
Stefan Hajnoczi939a1cc2012-01-04 22:23:34 +00001051 break;
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001052 }
Christoph Hellwig6d4a2b32011-01-24 13:32:33 +01001053}
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001054
1055static QObject *qobject_from_block_job(BlockJob *job)
1056{
1057 return qobject_from_jsonf("{ 'type': %s,"
1058 "'device': %s,"
1059 "'len': %" PRId64 ","
1060 "'offset': %" PRId64 ","
1061 "'speed': %" PRId64 " }",
1062 job->job_type->job_type,
1063 bdrv_get_device_name(job->bs),
1064 job->len,
1065 job->offset,
1066 job->speed);
1067}
1068
1069static void block_stream_cb(void *opaque, int ret)
1070{
1071 BlockDriverState *bs = opaque;
1072 QObject *obj;
1073
1074 trace_block_stream_cb(bs, bs->job, ret);
1075
1076 assert(bs->job);
1077 obj = qobject_from_block_job(bs->job);
1078 if (ret < 0) {
1079 QDict *dict = qobject_to_qdict(obj);
1080 qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
1081 }
1082
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00001083 if (block_job_is_cancelled(bs->job)) {
1084 monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj);
1085 } else {
1086 monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj);
1087 }
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001088 qobject_decref(obj);
Stefan Hajnocziaa398a52012-01-18 14:40:50 +00001089
1090 drive_put_ref_bh_schedule(drive_get_by_blockdev(bs));
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001091}
1092
1093void qmp_block_stream(const char *device, bool has_base,
1094 const char *base, Error **errp)
1095{
1096 BlockDriverState *bs;
Marcelo Tosattic8c30802012-01-18 14:40:53 +00001097 BlockDriverState *base_bs = NULL;
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01001098 Error *local_err = NULL;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001099
1100 bs = bdrv_find(device);
1101 if (!bs) {
1102 error_set(errp, QERR_DEVICE_NOT_FOUND, device);
1103 return;
1104 }
1105
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001106 if (base) {
Marcelo Tosattic8c30802012-01-18 14:40:53 +00001107 base_bs = bdrv_find_backing_image(bs, base);
1108 if (base_bs == NULL) {
1109 error_set(errp, QERR_BASE_NOT_FOUND, base);
1110 return;
1111 }
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001112 }
1113
Stefan Hajnoczifd7f8c62012-04-25 16:51:00 +01001114 stream_start(bs, base_bs, base, block_stream_cb, bs, &local_err);
1115 if (error_is_set(&local_err)) {
1116 error_propagate(errp, local_err);
1117 return;
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001118 }
1119
Stefan Hajnocziaa398a52012-01-18 14:40:50 +00001120 /* Grab a reference so hotplug does not delete the BlockDriverState from
1121 * underneath us.
1122 */
1123 drive_get_ref(drive_get_by_blockdev(bs));
1124
Stefan Hajnoczi12bd4512012-01-18 14:40:46 +00001125 trace_qmp_block_stream(bs, bs->job);
1126}
Stefan Hajnoczi2d47c6e2012-01-18 14:40:47 +00001127
1128static BlockJob *find_block_job(const char *device)
1129{
1130 BlockDriverState *bs;
1131
1132 bs = bdrv_find(device);
1133 if (!bs || !bs->job) {
1134 return NULL;
1135 }
1136 return bs->job;
1137}
1138
1139void qmp_block_job_set_speed(const char *device, int64_t value, Error **errp)
1140{
1141 BlockJob *job = find_block_job(device);
1142
1143 if (!job) {
1144 error_set(errp, QERR_DEVICE_NOT_ACTIVE, device);
1145 return;
1146 }
1147
1148 if (block_job_set_speed(job, value) < 0) {
1149 error_set(errp, QERR_NOT_SUPPORTED);
1150 }
1151}
Stefan Hajnoczi370521a2012-01-18 14:40:48 +00001152
1153void qmp_block_job_cancel(const char *device, Error **errp)
1154{
1155 BlockJob *job = find_block_job(device);
1156
1157 if (!job) {
1158 error_set(errp, QERR_DEVICE_NOT_ACTIVE, device);
1159 return;
1160 }
1161
1162 trace_qmp_block_job_cancel(job);
1163 block_job_cancel(job);
1164}
Stefan Hajnoczifb5458c2012-01-18 14:40:49 +00001165
1166static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs)
1167{
1168 BlockJobInfoList **prev = opaque;
1169 BlockJob *job = bs->job;
1170
1171 if (job) {
1172 BlockJobInfoList *elem;
1173 BlockJobInfo *info = g_new(BlockJobInfo, 1);
1174 *info = (BlockJobInfo){
1175 .type = g_strdup(job->job_type->job_type),
1176 .device = g_strdup(bdrv_get_device_name(bs)),
1177 .len = job->len,
1178 .offset = job->offset,
1179 .speed = job->speed,
1180 };
1181
1182 elem = g_new0(BlockJobInfoList, 1);
1183 elem->value = info;
1184
1185 (*prev)->next = elem;
1186 *prev = elem;
1187 }
1188}
1189
1190BlockJobInfoList *qmp_query_block_jobs(Error **errp)
1191{
1192 /* Dummy is a fake list element for holding the head pointer */
1193 BlockJobInfoList dummy = {};
1194 BlockJobInfoList *prev = &dummy;
1195 bdrv_iterate(do_qmp_query_block_jobs_one, &prev);
1196 return dummy.next;
1197}