root / blockdev.c @ 73f5e313
History | View | Annotate | Download (24 kB)
| 1 |
/*
|
|---|---|
| 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" |
| 16 |
#include "sysemu.h" |
| 17 |
#include "block_int.h" |
| 18 |
|
| 19 |
static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
|
| 20 |
|
| 21 |
static const char *const if_name[IF_COUNT] = { |
| 22 |
[IF_NONE] = "none",
|
| 23 |
[IF_IDE] = "ide",
|
| 24 |
[IF_SCSI] = "scsi",
|
| 25 |
[IF_FLOPPY] = "floppy",
|
| 26 |
[IF_PFLASH] = "pflash",
|
| 27 |
[IF_MTD] = "mtd",
|
| 28 |
[IF_SD] = "sd",
|
| 29 |
[IF_VIRTIO] = "virtio",
|
| 30 |
[IF_XEN] = "xen",
|
| 31 |
}; |
| 32 |
|
| 33 |
static const int if_max_devs[IF_COUNT] = { |
| 34 |
/*
|
| 35 |
* Do not change these numbers! They govern how drive option
|
| 36 |
* index maps to unit and bus. That mapping is ABI.
|
| 37 |
*
|
| 38 |
* All controllers used to imlement if=T drives need to support
|
| 39 |
* if_max_devs[T] units, for any T with if_max_devs[T] != 0.
|
| 40 |
* Otherwise, some index values map to "impossible" bus, unit
|
| 41 |
* values.
|
| 42 |
*
|
| 43 |
* For instance, if you change [IF_SCSI] to 255, -drive
|
| 44 |
* if=scsi,index=12 no longer means bus=1,unit=5, but
|
| 45 |
* bus=0,unit=12. With an lsi53c895a controller (7 units max),
|
| 46 |
* the drive can't be set up. Regression.
|
| 47 |
*/
|
| 48 |
[IF_IDE] = 2,
|
| 49 |
[IF_SCSI] = 7,
|
| 50 |
}; |
| 51 |
|
| 52 |
/*
|
| 53 |
* We automatically delete the drive when a device using it gets
|
| 54 |
* unplugged. Questionable feature, but we can't just drop it.
|
| 55 |
* Device models call blockdev_mark_auto_del() to schedule the
|
| 56 |
* automatic deletion, and generic qdev code calls blockdev_auto_del()
|
| 57 |
* when deletion is actually safe.
|
| 58 |
*/
|
| 59 |
void blockdev_mark_auto_del(BlockDriverState *bs)
|
| 60 |
{
|
| 61 |
DriveInfo *dinfo = drive_get_by_blockdev(bs); |
| 62 |
|
| 63 |
if (dinfo) {
|
| 64 |
dinfo->auto_del = 1;
|
| 65 |
} |
| 66 |
} |
| 67 |
|
| 68 |
void blockdev_auto_del(BlockDriverState *bs)
|
| 69 |
{
|
| 70 |
DriveInfo *dinfo = drive_get_by_blockdev(bs); |
| 71 |
|
| 72 |
if (dinfo && dinfo->auto_del) {
|
| 73 |
drive_put_ref(dinfo); |
| 74 |
} |
| 75 |
} |
| 76 |
|
| 77 |
static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
| 78 |
{
|
| 79 |
int max_devs = if_max_devs[type];
|
| 80 |
return max_devs ? index / max_devs : 0; |
| 81 |
} |
| 82 |
|
| 83 |
static int drive_index_to_unit_id(BlockInterfaceType type, int index) |
| 84 |
{
|
| 85 |
int max_devs = if_max_devs[type];
|
| 86 |
return max_devs ? index % max_devs : index;
|
| 87 |
} |
| 88 |
|
| 89 |
QemuOpts *drive_def(const char *optstr) |
| 90 |
{
|
| 91 |
return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); |
| 92 |
} |
| 93 |
|
| 94 |
QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
| 95 |
const char *optstr) |
| 96 |
{
|
| 97 |
QemuOpts *opts; |
| 98 |
char buf[32]; |
| 99 |
|
| 100 |
opts = drive_def(optstr); |
| 101 |
if (!opts) {
|
| 102 |
return NULL; |
| 103 |
} |
| 104 |
if (type != IF_DEFAULT) {
|
| 105 |
qemu_opt_set(opts, "if", if_name[type]);
|
| 106 |
} |
| 107 |
if (index >= 0) { |
| 108 |
snprintf(buf, sizeof(buf), "%d", index); |
| 109 |
qemu_opt_set(opts, "index", buf);
|
| 110 |
} |
| 111 |
if (file)
|
| 112 |
qemu_opt_set(opts, "file", file);
|
| 113 |
return opts;
|
| 114 |
} |
| 115 |
|
| 116 |
DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) |
| 117 |
{
|
| 118 |
DriveInfo *dinfo; |
| 119 |
|
| 120 |
/* seek interface, bus and unit */
|
| 121 |
|
| 122 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 123 |
if (dinfo->type == type &&
|
| 124 |
dinfo->bus == bus && |
| 125 |
dinfo->unit == unit) |
| 126 |
return dinfo;
|
| 127 |
} |
| 128 |
|
| 129 |
return NULL; |
| 130 |
} |
| 131 |
|
| 132 |
DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
|
| 133 |
{
|
| 134 |
return drive_get(type,
|
| 135 |
drive_index_to_bus_id(type, index), |
| 136 |
drive_index_to_unit_id(type, index)); |
| 137 |
} |
| 138 |
|
| 139 |
int drive_get_max_bus(BlockInterfaceType type)
|
| 140 |
{
|
| 141 |
int max_bus;
|
| 142 |
DriveInfo *dinfo; |
| 143 |
|
| 144 |
max_bus = -1;
|
| 145 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 146 |
if(dinfo->type == type &&
|
| 147 |
dinfo->bus > max_bus) |
| 148 |
max_bus = dinfo->bus; |
| 149 |
} |
| 150 |
return max_bus;
|
| 151 |
} |
| 152 |
|
| 153 |
/* Get a block device. This should only be used for single-drive devices
|
| 154 |
(e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
|
| 155 |
appropriate bus. */
|
| 156 |
DriveInfo *drive_get_next(BlockInterfaceType type) |
| 157 |
{
|
| 158 |
static int next_block_unit[IF_COUNT]; |
| 159 |
|
| 160 |
return drive_get(type, 0, next_block_unit[type]++); |
| 161 |
} |
| 162 |
|
| 163 |
DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) |
| 164 |
{
|
| 165 |
DriveInfo *dinfo; |
| 166 |
|
| 167 |
QTAILQ_FOREACH(dinfo, &drives, next) {
|
| 168 |
if (dinfo->bdrv == bs) {
|
| 169 |
return dinfo;
|
| 170 |
} |
| 171 |
} |
| 172 |
return NULL; |
| 173 |
} |
| 174 |
|
| 175 |
static void bdrv_format_print(void *opaque, const char *name) |
| 176 |
{
|
| 177 |
error_printf(" %s", name);
|
| 178 |
} |
| 179 |
|
| 180 |
static void drive_uninit(DriveInfo *dinfo) |
| 181 |
{
|
| 182 |
qemu_opts_del(dinfo->opts); |
| 183 |
bdrv_delete(dinfo->bdrv); |
| 184 |
g_free(dinfo->id); |
| 185 |
QTAILQ_REMOVE(&drives, dinfo, next); |
| 186 |
g_free(dinfo); |
| 187 |
} |
| 188 |
|
| 189 |
void drive_put_ref(DriveInfo *dinfo)
|
| 190 |
{
|
| 191 |
assert(dinfo->refcount); |
| 192 |
if (--dinfo->refcount == 0) { |
| 193 |
drive_uninit(dinfo); |
| 194 |
} |
| 195 |
} |
| 196 |
|
| 197 |
void drive_get_ref(DriveInfo *dinfo)
|
| 198 |
{
|
| 199 |
dinfo->refcount++; |
| 200 |
} |
| 201 |
|
| 202 |
static int parse_block_error_action(const char *buf, int is_read) |
| 203 |
{
|
| 204 |
if (!strcmp(buf, "ignore")) { |
| 205 |
return BLOCK_ERR_IGNORE;
|
| 206 |
} else if (!is_read && !strcmp(buf, "enospc")) { |
| 207 |
return BLOCK_ERR_STOP_ENOSPC;
|
| 208 |
} else if (!strcmp(buf, "stop")) { |
| 209 |
return BLOCK_ERR_STOP_ANY;
|
| 210 |
} else if (!strcmp(buf, "report")) { |
| 211 |
return BLOCK_ERR_REPORT;
|
| 212 |
} else {
|
| 213 |
error_report("'%s' invalid %s error action",
|
| 214 |
buf, is_read ? "read" : "write"); |
| 215 |
return -1; |
| 216 |
} |
| 217 |
} |
| 218 |
|
| 219 |
static bool do_check_io_limits(BlockIOLimit *io_limits) |
| 220 |
{
|
| 221 |
bool bps_flag;
|
| 222 |
bool iops_flag;
|
| 223 |
|
| 224 |
assert(io_limits); |
| 225 |
|
| 226 |
bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
|
| 227 |
&& ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
|
| 228 |
|| (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
|
| 229 |
iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
|
| 230 |
&& ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
|
| 231 |
|| (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
|
| 232 |
if (bps_flag || iops_flag) {
|
| 233 |
return false; |
| 234 |
} |
| 235 |
|
| 236 |
return true; |
| 237 |
} |
| 238 |
|
| 239 |
DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
|
| 240 |
{
|
| 241 |
const char *buf; |
| 242 |
const char *file = NULL; |
| 243 |
char devname[128]; |
| 244 |
const char *serial; |
| 245 |
const char *mediastr = ""; |
| 246 |
BlockInterfaceType type; |
| 247 |
enum { MEDIA_DISK, MEDIA_CDROM } media;
|
| 248 |
int bus_id, unit_id;
|
| 249 |
int cyls, heads, secs, translation;
|
| 250 |
BlockDriver *drv = NULL;
|
| 251 |
int max_devs;
|
| 252 |
int index;
|
| 253 |
int ro = 0; |
| 254 |
int bdrv_flags = 0; |
| 255 |
int on_read_error, on_write_error;
|
| 256 |
const char *devaddr; |
| 257 |
DriveInfo *dinfo; |
| 258 |
BlockIOLimit io_limits; |
| 259 |
int snapshot = 0; |
| 260 |
bool copy_on_read;
|
| 261 |
int ret;
|
| 262 |
|
| 263 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
| 264 |
media = MEDIA_DISK; |
| 265 |
|
| 266 |
/* extract parameters */
|
| 267 |
bus_id = qemu_opt_get_number(opts, "bus", 0); |
| 268 |
unit_id = qemu_opt_get_number(opts, "unit", -1); |
| 269 |
index = qemu_opt_get_number(opts, "index", -1); |
| 270 |
|
| 271 |
cyls = qemu_opt_get_number(opts, "cyls", 0); |
| 272 |
heads = qemu_opt_get_number(opts, "heads", 0); |
| 273 |
secs = qemu_opt_get_number(opts, "secs", 0); |
| 274 |
|
| 275 |
snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
| 276 |
ro = qemu_opt_get_bool(opts, "readonly", 0); |
| 277 |
copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
| 278 |
|
| 279 |
file = qemu_opt_get(opts, "file");
|
| 280 |
serial = qemu_opt_get(opts, "serial");
|
| 281 |
|
| 282 |
if ((buf = qemu_opt_get(opts, "if")) != NULL) { |
| 283 |
pstrcpy(devname, sizeof(devname), buf);
|
| 284 |
for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
| 285 |
; |
| 286 |
if (type == IF_COUNT) {
|
| 287 |
error_report("unsupported bus type '%s'", buf);
|
| 288 |
return NULL; |
| 289 |
} |
| 290 |
} else {
|
| 291 |
type = default_to_scsi ? IF_SCSI : IF_IDE; |
| 292 |
pstrcpy(devname, sizeof(devname), if_name[type]);
|
| 293 |
} |
| 294 |
|
| 295 |
max_devs = if_max_devs[type]; |
| 296 |
|
| 297 |
if (cyls || heads || secs) {
|
| 298 |
if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { |
| 299 |
error_report("invalid physical cyls number");
|
| 300 |
return NULL; |
| 301 |
} |
| 302 |
if (heads < 1 || (type == IF_IDE && heads > 16)) { |
| 303 |
error_report("invalid physical heads number");
|
| 304 |
return NULL; |
| 305 |
} |
| 306 |
if (secs < 1 || (type == IF_IDE && secs > 63)) { |
| 307 |
error_report("invalid physical secs number");
|
| 308 |
return NULL; |
| 309 |
} |
| 310 |
} |
| 311 |
|
| 312 |
if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
| 313 |
if (!cyls) {
|
| 314 |
error_report("'%s' trans must be used with cyls, heads and secs",
|
| 315 |
buf); |
| 316 |
return NULL; |
| 317 |
} |
| 318 |
if (!strcmp(buf, "none")) |
| 319 |
translation = BIOS_ATA_TRANSLATION_NONE; |
| 320 |
else if (!strcmp(buf, "lba")) |
| 321 |
translation = BIOS_ATA_TRANSLATION_LBA; |
| 322 |
else if (!strcmp(buf, "auto")) |
| 323 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
| 324 |
else {
|
| 325 |
error_report("'%s' invalid translation type", buf);
|
| 326 |
return NULL; |
| 327 |
} |
| 328 |
} |
| 329 |
|
| 330 |
if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
| 331 |
if (!strcmp(buf, "disk")) { |
| 332 |
media = MEDIA_DISK; |
| 333 |
} else if (!strcmp(buf, "cdrom")) { |
| 334 |
if (cyls || secs || heads) {
|
| 335 |
error_report("CHS can't be set with media=%s", buf);
|
| 336 |
return NULL; |
| 337 |
} |
| 338 |
media = MEDIA_CDROM; |
| 339 |
} else {
|
| 340 |
error_report("'%s' invalid media", buf);
|
| 341 |
return NULL; |
| 342 |
} |
| 343 |
} |
| 344 |
|
| 345 |
if ((buf = qemu_opt_get(opts, "cache")) != NULL) { |
| 346 |
if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { |
| 347 |
error_report("invalid cache option");
|
| 348 |
return NULL; |
| 349 |
} |
| 350 |
} |
| 351 |
|
| 352 |
#ifdef CONFIG_LINUX_AIO
|
| 353 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
| 354 |
if (!strcmp(buf, "native")) { |
| 355 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
| 356 |
} else if (!strcmp(buf, "threads")) { |
| 357 |
/* this is the default */
|
| 358 |
} else {
|
| 359 |
error_report("invalid aio option");
|
| 360 |
return NULL; |
| 361 |
} |
| 362 |
} |
| 363 |
#endif
|
| 364 |
|
| 365 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
| 366 |
if (strcmp(buf, "?") == 0) { |
| 367 |
error_printf("Supported formats:");
|
| 368 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
| 369 |
error_printf("\n");
|
| 370 |
return NULL; |
| 371 |
} |
| 372 |
drv = bdrv_find_whitelisted_format(buf); |
| 373 |
if (!drv) {
|
| 374 |
error_report("'%s' invalid format", buf);
|
| 375 |
return NULL; |
| 376 |
} |
| 377 |
} |
| 378 |
|
| 379 |
/* disk I/O throttling */
|
| 380 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = |
| 381 |
qemu_opt_get_number(opts, "bps", 0); |
| 382 |
io_limits.bps[BLOCK_IO_LIMIT_READ] = |
| 383 |
qemu_opt_get_number(opts, "bps_rd", 0); |
| 384 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = |
| 385 |
qemu_opt_get_number(opts, "bps_wr", 0); |
| 386 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = |
| 387 |
qemu_opt_get_number(opts, "iops", 0); |
| 388 |
io_limits.iops[BLOCK_IO_LIMIT_READ] = |
| 389 |
qemu_opt_get_number(opts, "iops_rd", 0); |
| 390 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE] = |
| 391 |
qemu_opt_get_number(opts, "iops_wr", 0); |
| 392 |
|
| 393 |
if (!do_check_io_limits(&io_limits)) {
|
| 394 |
error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
|
| 395 |
"cannot be used at the same time");
|
| 396 |
return NULL; |
| 397 |
} |
| 398 |
|
| 399 |
on_write_error = BLOCK_ERR_STOP_ENOSPC; |
| 400 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
| 401 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
| 402 |
error_report("werror is not supported by this bus type");
|
| 403 |
return NULL; |
| 404 |
} |
| 405 |
|
| 406 |
on_write_error = parse_block_error_action(buf, 0);
|
| 407 |
if (on_write_error < 0) { |
| 408 |
return NULL; |
| 409 |
} |
| 410 |
} |
| 411 |
|
| 412 |
on_read_error = BLOCK_ERR_REPORT; |
| 413 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
| 414 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
| 415 |
error_report("rerror is not supported by this bus type");
|
| 416 |
return NULL; |
| 417 |
} |
| 418 |
|
| 419 |
on_read_error = parse_block_error_action(buf, 1);
|
| 420 |
if (on_read_error < 0) { |
| 421 |
return NULL; |
| 422 |
} |
| 423 |
} |
| 424 |
|
| 425 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
| 426 |
if (type != IF_VIRTIO) {
|
| 427 |
error_report("addr is not supported by this bus type");
|
| 428 |
return NULL; |
| 429 |
} |
| 430 |
} |
| 431 |
|
| 432 |
/* compute bus and unit according index */
|
| 433 |
|
| 434 |
if (index != -1) { |
| 435 |
if (bus_id != 0 || unit_id != -1) { |
| 436 |
error_report("index cannot be used with bus and unit");
|
| 437 |
return NULL; |
| 438 |
} |
| 439 |
bus_id = drive_index_to_bus_id(type, index); |
| 440 |
unit_id = drive_index_to_unit_id(type, index); |
| 441 |
} |
| 442 |
|
| 443 |
/* if user doesn't specify a unit_id,
|
| 444 |
* try to find the first free
|
| 445 |
*/
|
| 446 |
|
| 447 |
if (unit_id == -1) { |
| 448 |
unit_id = 0;
|
| 449 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
| 450 |
unit_id++; |
| 451 |
if (max_devs && unit_id >= max_devs) {
|
| 452 |
unit_id -= max_devs; |
| 453 |
bus_id++; |
| 454 |
} |
| 455 |
} |
| 456 |
} |
| 457 |
|
| 458 |
/* check unit id */
|
| 459 |
|
| 460 |
if (max_devs && unit_id >= max_devs) {
|
| 461 |
error_report("unit %d too big (max is %d)",
|
| 462 |
unit_id, max_devs - 1);
|
| 463 |
return NULL; |
| 464 |
} |
| 465 |
|
| 466 |
/*
|
| 467 |
* catch multiple definitions
|
| 468 |
*/
|
| 469 |
|
| 470 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
| 471 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
| 472 |
bus_id, unit_id, index); |
| 473 |
return NULL; |
| 474 |
} |
| 475 |
|
| 476 |
/* init */
|
| 477 |
|
| 478 |
dinfo = g_malloc0(sizeof(*dinfo));
|
| 479 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
| 480 |
dinfo->id = g_strdup(buf); |
| 481 |
} else {
|
| 482 |
/* no id supplied -> create one */
|
| 483 |
dinfo->id = g_malloc0(32);
|
| 484 |
if (type == IF_IDE || type == IF_SCSI)
|
| 485 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
| 486 |
if (max_devs)
|
| 487 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
| 488 |
devname, bus_id, mediastr, unit_id); |
| 489 |
else
|
| 490 |
snprintf(dinfo->id, 32, "%s%s%i", |
| 491 |
devname, mediastr, unit_id); |
| 492 |
} |
| 493 |
dinfo->bdrv = bdrv_new(dinfo->id); |
| 494 |
dinfo->devaddr = devaddr; |
| 495 |
dinfo->type = type; |
| 496 |
dinfo->bus = bus_id; |
| 497 |
dinfo->unit = unit_id; |
| 498 |
dinfo->opts = opts; |
| 499 |
dinfo->refcount = 1;
|
| 500 |
if (serial)
|
| 501 |
strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); |
| 502 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
| 503 |
|
| 504 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
| 505 |
|
| 506 |
/* disk I/O throttling */
|
| 507 |
bdrv_set_io_limits(dinfo->bdrv, &io_limits); |
| 508 |
|
| 509 |
switch(type) {
|
| 510 |
case IF_IDE:
|
| 511 |
case IF_SCSI:
|
| 512 |
case IF_XEN:
|
| 513 |
case IF_NONE:
|
| 514 |
switch(media) {
|
| 515 |
case MEDIA_DISK:
|
| 516 |
if (cyls != 0) { |
| 517 |
bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); |
| 518 |
bdrv_set_translation_hint(dinfo->bdrv, translation); |
| 519 |
} |
| 520 |
break;
|
| 521 |
case MEDIA_CDROM:
|
| 522 |
dinfo->media_cd = 1;
|
| 523 |
break;
|
| 524 |
} |
| 525 |
break;
|
| 526 |
case IF_SD:
|
| 527 |
case IF_FLOPPY:
|
| 528 |
case IF_PFLASH:
|
| 529 |
case IF_MTD:
|
| 530 |
break;
|
| 531 |
case IF_VIRTIO:
|
| 532 |
/* add virtio block device */
|
| 533 |
opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); |
| 534 |
qemu_opt_set(opts, "driver", "virtio-blk"); |
| 535 |
qemu_opt_set(opts, "drive", dinfo->id);
|
| 536 |
if (devaddr)
|
| 537 |
qemu_opt_set(opts, "addr", devaddr);
|
| 538 |
break;
|
| 539 |
default:
|
| 540 |
abort(); |
| 541 |
} |
| 542 |
if (!file || !*file) {
|
| 543 |
return dinfo;
|
| 544 |
} |
| 545 |
if (snapshot) {
|
| 546 |
/* always use cache=unsafe with snapshot */
|
| 547 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
| 548 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
| 549 |
} |
| 550 |
|
| 551 |
if (copy_on_read) {
|
| 552 |
bdrv_flags |= BDRV_O_COPY_ON_READ; |
| 553 |
} |
| 554 |
|
| 555 |
if (media == MEDIA_CDROM) {
|
| 556 |
/* CDROM is fine for any interface, don't check. */
|
| 557 |
ro = 1;
|
| 558 |
} else if (ro == 1) { |
| 559 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
|
| 560 |
error_report("readonly not supported by this bus type");
|
| 561 |
goto err;
|
| 562 |
} |
| 563 |
} |
| 564 |
|
| 565 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
| 566 |
|
| 567 |
ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); |
| 568 |
if (ret < 0) { |
| 569 |
error_report("could not open disk image %s: %s",
|
| 570 |
file, strerror(-ret)); |
| 571 |
goto err;
|
| 572 |
} |
| 573 |
|
| 574 |
if (bdrv_key_required(dinfo->bdrv))
|
| 575 |
autostart = 0;
|
| 576 |
return dinfo;
|
| 577 |
|
| 578 |
err:
|
| 579 |
bdrv_delete(dinfo->bdrv); |
| 580 |
g_free(dinfo->id); |
| 581 |
QTAILQ_REMOVE(&drives, dinfo, next); |
| 582 |
g_free(dinfo); |
| 583 |
return NULL; |
| 584 |
} |
| 585 |
|
| 586 |
void do_commit(Monitor *mon, const QDict *qdict) |
| 587 |
{
|
| 588 |
const char *device = qdict_get_str(qdict, "device"); |
| 589 |
BlockDriverState *bs; |
| 590 |
|
| 591 |
if (!strcmp(device, "all")) { |
| 592 |
bdrv_commit_all(); |
| 593 |
} else {
|
| 594 |
bs = bdrv_find(device); |
| 595 |
if (!bs) {
|
| 596 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 597 |
return;
|
| 598 |
} |
| 599 |
bdrv_commit(bs); |
| 600 |
} |
| 601 |
} |
| 602 |
|
| 603 |
int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 604 |
{
|
| 605 |
const char *device = qdict_get_str(qdict, "device"); |
| 606 |
const char *filename = qdict_get_try_str(qdict, "snapshot-file"); |
| 607 |
const char *format = qdict_get_try_str(qdict, "format"); |
| 608 |
BlockDriverState *bs; |
| 609 |
BlockDriver *drv, *old_drv, *proto_drv; |
| 610 |
int ret = 0; |
| 611 |
int flags;
|
| 612 |
char old_filename[1024]; |
| 613 |
|
| 614 |
if (!filename) {
|
| 615 |
qerror_report(QERR_MISSING_PARAMETER, "snapshot-file");
|
| 616 |
ret = -1;
|
| 617 |
goto out;
|
| 618 |
} |
| 619 |
|
| 620 |
bs = bdrv_find(device); |
| 621 |
if (!bs) {
|
| 622 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 623 |
ret = -1;
|
| 624 |
goto out;
|
| 625 |
} |
| 626 |
|
| 627 |
pstrcpy(old_filename, sizeof(old_filename), bs->filename);
|
| 628 |
|
| 629 |
old_drv = bs->drv; |
| 630 |
flags = bs->open_flags; |
| 631 |
|
| 632 |
if (!format) {
|
| 633 |
format = "qcow2";
|
| 634 |
} |
| 635 |
|
| 636 |
drv = bdrv_find_format(format); |
| 637 |
if (!drv) {
|
| 638 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, format); |
| 639 |
ret = -1;
|
| 640 |
goto out;
|
| 641 |
} |
| 642 |
|
| 643 |
proto_drv = bdrv_find_protocol(filename); |
| 644 |
if (!proto_drv) {
|
| 645 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, format); |
| 646 |
ret = -1;
|
| 647 |
goto out;
|
| 648 |
} |
| 649 |
|
| 650 |
ret = bdrv_img_create(filename, format, bs->filename, |
| 651 |
bs->drv->format_name, NULL, -1, flags); |
| 652 |
if (ret) {
|
| 653 |
goto out;
|
| 654 |
} |
| 655 |
|
| 656 |
bdrv_drain_all(); |
| 657 |
bdrv_flush(bs); |
| 658 |
|
| 659 |
bdrv_close(bs); |
| 660 |
ret = bdrv_open(bs, filename, flags, drv); |
| 661 |
/*
|
| 662 |
* If reopening the image file we just created fails, fall back
|
| 663 |
* and try to re-open the original image. If that fails too, we
|
| 664 |
* are in serious trouble.
|
| 665 |
*/
|
| 666 |
if (ret != 0) { |
| 667 |
ret = bdrv_open(bs, old_filename, flags, old_drv); |
| 668 |
if (ret != 0) { |
| 669 |
qerror_report(QERR_OPEN_FILE_FAILED, old_filename); |
| 670 |
} else {
|
| 671 |
qerror_report(QERR_OPEN_FILE_FAILED, filename); |
| 672 |
} |
| 673 |
} |
| 674 |
out:
|
| 675 |
if (ret) {
|
| 676 |
ret = -1;
|
| 677 |
} |
| 678 |
|
| 679 |
return ret;
|
| 680 |
} |
| 681 |
|
| 682 |
static int eject_device(Monitor *mon, BlockDriverState *bs, int force) |
| 683 |
{
|
| 684 |
if (!bdrv_dev_has_removable_media(bs)) {
|
| 685 |
qerror_report(QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
| 686 |
return -1; |
| 687 |
} |
| 688 |
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
| 689 |
bdrv_dev_eject_request(bs, force); |
| 690 |
if (!force) {
|
| 691 |
qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
| 692 |
return -1; |
| 693 |
} |
| 694 |
} |
| 695 |
bdrv_close(bs); |
| 696 |
return 0; |
| 697 |
} |
| 698 |
|
| 699 |
int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 700 |
{
|
| 701 |
BlockDriverState *bs; |
| 702 |
int force = qdict_get_try_bool(qdict, "force", 0); |
| 703 |
const char *filename = qdict_get_str(qdict, "device"); |
| 704 |
|
| 705 |
bs = bdrv_find(filename); |
| 706 |
if (!bs) {
|
| 707 |
qerror_report(QERR_DEVICE_NOT_FOUND, filename); |
| 708 |
return -1; |
| 709 |
} |
| 710 |
return eject_device(mon, bs, force);
|
| 711 |
} |
| 712 |
|
| 713 |
int do_block_set_passwd(Monitor *mon, const QDict *qdict, |
| 714 |
QObject **ret_data) |
| 715 |
{
|
| 716 |
BlockDriverState *bs; |
| 717 |
int err;
|
| 718 |
|
| 719 |
bs = bdrv_find(qdict_get_str(qdict, "device"));
|
| 720 |
if (!bs) {
|
| 721 |
qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
|
| 722 |
return -1; |
| 723 |
} |
| 724 |
|
| 725 |
err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
|
| 726 |
if (err == -EINVAL) {
|
| 727 |
qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
| 728 |
return -1; |
| 729 |
} else if (err < 0) { |
| 730 |
qerror_report(QERR_INVALID_PASSWORD); |
| 731 |
return -1; |
| 732 |
} |
| 733 |
|
| 734 |
return 0; |
| 735 |
} |
| 736 |
|
| 737 |
int do_change_block(Monitor *mon, const char *device, |
| 738 |
const char *filename, const char *fmt) |
| 739 |
{
|
| 740 |
BlockDriverState *bs; |
| 741 |
BlockDriver *drv = NULL;
|
| 742 |
int bdrv_flags;
|
| 743 |
|
| 744 |
bs = bdrv_find(device); |
| 745 |
if (!bs) {
|
| 746 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 747 |
return -1; |
| 748 |
} |
| 749 |
if (fmt) {
|
| 750 |
drv = bdrv_find_whitelisted_format(fmt); |
| 751 |
if (!drv) {
|
| 752 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt); |
| 753 |
return -1; |
| 754 |
} |
| 755 |
} |
| 756 |
if (eject_device(mon, bs, 0) < 0) { |
| 757 |
return -1; |
| 758 |
} |
| 759 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
| 760 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
| 761 |
if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { |
| 762 |
qerror_report(QERR_OPEN_FILE_FAILED, filename); |
| 763 |
return -1; |
| 764 |
} |
| 765 |
return monitor_read_bdrv_key_start(mon, bs, NULL, NULL); |
| 766 |
} |
| 767 |
|
| 768 |
/* throttling disk I/O limits */
|
| 769 |
int do_block_set_io_throttle(Monitor *mon,
|
| 770 |
const QDict *qdict, QObject **ret_data)
|
| 771 |
{
|
| 772 |
BlockIOLimit io_limits; |
| 773 |
const char *devname = qdict_get_str(qdict, "device"); |
| 774 |
BlockDriverState *bs; |
| 775 |
|
| 776 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] |
| 777 |
= qdict_get_try_int(qdict, "bps", -1); |
| 778 |
io_limits.bps[BLOCK_IO_LIMIT_READ] |
| 779 |
= qdict_get_try_int(qdict, "bps_rd", -1); |
| 780 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] |
| 781 |
= qdict_get_try_int(qdict, "bps_wr", -1); |
| 782 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL] |
| 783 |
= qdict_get_try_int(qdict, "iops", -1); |
| 784 |
io_limits.iops[BLOCK_IO_LIMIT_READ] |
| 785 |
= qdict_get_try_int(qdict, "iops_rd", -1); |
| 786 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE] |
| 787 |
= qdict_get_try_int(qdict, "iops_wr", -1); |
| 788 |
|
| 789 |
bs = bdrv_find(devname); |
| 790 |
if (!bs) {
|
| 791 |
qerror_report(QERR_DEVICE_NOT_FOUND, devname); |
| 792 |
return -1; |
| 793 |
} |
| 794 |
|
| 795 |
if ((io_limits.bps[BLOCK_IO_LIMIT_TOTAL] == -1) |
| 796 |
|| (io_limits.bps[BLOCK_IO_LIMIT_READ] == -1)
|
| 797 |
|| (io_limits.bps[BLOCK_IO_LIMIT_WRITE] == -1)
|
| 798 |
|| (io_limits.iops[BLOCK_IO_LIMIT_TOTAL] == -1)
|
| 799 |
|| (io_limits.iops[BLOCK_IO_LIMIT_READ] == -1)
|
| 800 |
|| (io_limits.iops[BLOCK_IO_LIMIT_WRITE] == -1)) {
|
| 801 |
qerror_report(QERR_MISSING_PARAMETER, |
| 802 |
"bps/bps_rd/bps_wr/iops/iops_rd/iops_wr");
|
| 803 |
return -1; |
| 804 |
} |
| 805 |
|
| 806 |
if (!do_check_io_limits(&io_limits)) {
|
| 807 |
qerror_report(QERR_INVALID_PARAMETER_COMBINATION); |
| 808 |
return -1; |
| 809 |
} |
| 810 |
|
| 811 |
bs->io_limits = io_limits; |
| 812 |
bs->slice_time = BLOCK_IO_SLICE_TIME; |
| 813 |
|
| 814 |
if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
|
| 815 |
bdrv_io_limits_enable(bs); |
| 816 |
} else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { |
| 817 |
bdrv_io_limits_disable(bs); |
| 818 |
} else {
|
| 819 |
if (bs->block_timer) {
|
| 820 |
qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); |
| 821 |
} |
| 822 |
} |
| 823 |
|
| 824 |
return 0; |
| 825 |
} |
| 826 |
|
| 827 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 828 |
{
|
| 829 |
const char *id = qdict_get_str(qdict, "id"); |
| 830 |
BlockDriverState *bs; |
| 831 |
|
| 832 |
bs = bdrv_find(id); |
| 833 |
if (!bs) {
|
| 834 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
| 835 |
return -1; |
| 836 |
} |
| 837 |
if (bdrv_in_use(bs)) {
|
| 838 |
qerror_report(QERR_DEVICE_IN_USE, id); |
| 839 |
return -1; |
| 840 |
} |
| 841 |
|
| 842 |
/* quiesce block driver; prevent further io */
|
| 843 |
bdrv_drain_all(); |
| 844 |
bdrv_flush(bs); |
| 845 |
bdrv_close(bs); |
| 846 |
|
| 847 |
/* if we have a device attached to this BlockDriverState
|
| 848 |
* then we need to make the drive anonymous until the device
|
| 849 |
* can be removed. If this is a drive with no device backing
|
| 850 |
* then we can just get rid of the block driver state right here.
|
| 851 |
*/
|
| 852 |
if (bdrv_get_attached_dev(bs)) {
|
| 853 |
bdrv_make_anon(bs); |
| 854 |
} else {
|
| 855 |
drive_uninit(drive_get_by_blockdev(bs)); |
| 856 |
} |
| 857 |
|
| 858 |
return 0; |
| 859 |
} |
| 860 |
|
| 861 |
/*
|
| 862 |
* XXX: replace the QERR_UNDEFINED_ERROR errors with real values once the
|
| 863 |
* existing QERR_ macro mess is cleaned up. A good example for better
|
| 864 |
* error reports can be found in the qemu-img resize code.
|
| 865 |
*/
|
| 866 |
int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 867 |
{
|
| 868 |
const char *device = qdict_get_str(qdict, "device"); |
| 869 |
int64_t size = qdict_get_int(qdict, "size");
|
| 870 |
BlockDriverState *bs; |
| 871 |
|
| 872 |
bs = bdrv_find(device); |
| 873 |
if (!bs) {
|
| 874 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 875 |
return -1; |
| 876 |
} |
| 877 |
|
| 878 |
if (size < 0) { |
| 879 |
qerror_report(QERR_UNDEFINED_ERROR); |
| 880 |
return -1; |
| 881 |
} |
| 882 |
|
| 883 |
if (bdrv_truncate(bs, size)) {
|
| 884 |
qerror_report(QERR_UNDEFINED_ERROR); |
| 885 |
return -1; |
| 886 |
} |
| 887 |
|
| 888 |
return 0; |
| 889 |
} |