2 * QEMU host block devices
4 * Copyright (c) 2003-2008 Fabrice Bellard
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.
14 #include "qemu-option.h"
15 #include "qemu-config.h"
18 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
20 QemuOpts *drive_add(const char *file, const char *fmt, ...)
27 vsnprintf(optstr, sizeof(optstr), fmt, ap);
30 opts = qemu_opts_parse(&qemu_drive_opts, optstr, 0);
35 qemu_opt_set(opts, "file", file);
39 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
43 /* seek interface, bus and unit */
45 QTAILQ_FOREACH(dinfo, &drives, next) {
46 if (dinfo->type == type &&
55 DriveInfo *drive_get_by_id(const char *id)
59 QTAILQ_FOREACH(dinfo, &drives, next) {
60 if (strcmp(id, dinfo->id))
67 int drive_get_max_bus(BlockInterfaceType type)
73 QTAILQ_FOREACH(dinfo, &drives, next) {
74 if(dinfo->type == type &&
81 const char *drive_get_serial(BlockDriverState *bdrv)
85 QTAILQ_FOREACH(dinfo, &drives, next) {
86 if (dinfo->bdrv == bdrv)
93 static void bdrv_format_print(void *opaque, const char *name)
95 fprintf(stderr, " %s", name);
98 void drive_uninit(DriveInfo *dinfo)
100 qemu_opts_del(dinfo->opts);
101 bdrv_delete(dinfo->bdrv);
102 QTAILQ_REMOVE(&drives, dinfo, next);
106 static int parse_block_error_action(const char *buf, int is_read)
108 if (!strcmp(buf, "ignore")) {
109 return BLOCK_ERR_IGNORE;
110 } else if (!is_read && !strcmp(buf, "enospc")) {
111 return BLOCK_ERR_STOP_ENOSPC;
112 } else if (!strcmp(buf, "stop")) {
113 return BLOCK_ERR_STOP_ANY;
114 } else if (!strcmp(buf, "report")) {
115 return BLOCK_ERR_REPORT;
117 fprintf(stderr, "qemu: '%s' invalid %s error action\n",
118 buf, is_read ? "read" : "write");
123 DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
126 const char *file = NULL;
129 const char *mediastr = "";
130 BlockInterfaceType type;
131 enum { MEDIA_DISK, MEDIA_CDROM } media;
133 int cyls, heads, secs, translation;
134 BlockDriver *drv = NULL;
139 int on_read_error, on_write_error;
147 translation = BIOS_ATA_TRANSLATION_AUTO;
149 if (default_to_scsi) {
151 max_devs = MAX_SCSI_DEVS;
152 pstrcpy(devname, sizeof(devname), "scsi");
155 max_devs = MAX_IDE_DEVS;
156 pstrcpy(devname, sizeof(devname), "ide");
160 /* extract parameters */
161 bus_id = qemu_opt_get_number(opts, "bus", 0);
162 unit_id = qemu_opt_get_number(opts, "unit", -1);
163 index = qemu_opt_get_number(opts, "index", -1);
165 cyls = qemu_opt_get_number(opts, "cyls", 0);
166 heads = qemu_opt_get_number(opts, "heads", 0);
167 secs = qemu_opt_get_number(opts, "secs", 0);
169 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
170 ro = qemu_opt_get_bool(opts, "readonly", 0);
172 file = qemu_opt_get(opts, "file");
173 serial = qemu_opt_get(opts, "serial");
175 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
176 pstrcpy(devname, sizeof(devname), buf);
177 if (!strcmp(buf, "ide")) {
179 max_devs = MAX_IDE_DEVS;
180 } else if (!strcmp(buf, "scsi")) {
182 max_devs = MAX_SCSI_DEVS;
183 } else if (!strcmp(buf, "floppy")) {
186 } else if (!strcmp(buf, "pflash")) {
189 } else if (!strcmp(buf, "mtd")) {
192 } else if (!strcmp(buf, "sd")) {
195 } else if (!strcmp(buf, "virtio")) {
198 } else if (!strcmp(buf, "xen")) {
201 } else if (!strcmp(buf, "none")) {
205 fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf);
210 if (cyls || heads || secs) {
211 if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
212 fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
215 if (heads < 1 || (type == IF_IDE && heads > 16)) {
216 fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
219 if (secs < 1 || (type == IF_IDE && secs > 63)) {
220 fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
225 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
228 "qemu: '%s' trans must be used with cyls,heads and secs\n",
232 if (!strcmp(buf, "none"))
233 translation = BIOS_ATA_TRANSLATION_NONE;
234 else if (!strcmp(buf, "lba"))
235 translation = BIOS_ATA_TRANSLATION_LBA;
236 else if (!strcmp(buf, "auto"))
237 translation = BIOS_ATA_TRANSLATION_AUTO;
239 fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
244 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
245 if (!strcmp(buf, "disk")) {
247 } else if (!strcmp(buf, "cdrom")) {
248 if (cyls || secs || heads) {
250 "qemu: '%s' invalid physical CHS format\n", buf);
255 fprintf(stderr, "qemu: '%s' invalid media\n", buf);
260 if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
261 if (!strcmp(buf, "off") || !strcmp(buf, "none")) {
262 bdrv_flags |= BDRV_O_NOCACHE;
263 } else if (!strcmp(buf, "writeback")) {
264 bdrv_flags |= BDRV_O_CACHE_WB;
265 } else if (!strcmp(buf, "unsafe")) {
266 bdrv_flags |= BDRV_O_CACHE_WB;
267 bdrv_flags |= BDRV_O_NO_FLUSH;
268 } else if (!strcmp(buf, "writethrough")) {
269 /* this is the default */
271 fprintf(stderr, "qemu: invalid cache option\n");
276 #ifdef CONFIG_LINUX_AIO
277 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
278 if (!strcmp(buf, "native")) {
279 bdrv_flags |= BDRV_O_NATIVE_AIO;
280 } else if (!strcmp(buf, "threads")) {
281 /* this is the default */
283 fprintf(stderr, "qemu: invalid aio option\n");
289 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
290 if (strcmp(buf, "?") == 0) {
291 fprintf(stderr, "qemu: Supported formats:");
292 bdrv_iterate_format(bdrv_format_print, NULL);
293 fprintf(stderr, "\n");
296 drv = bdrv_find_whitelisted_format(buf);
298 fprintf(stderr, "qemu: '%s' invalid format\n", buf);
303 on_write_error = BLOCK_ERR_STOP_ENOSPC;
304 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
305 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
306 fprintf(stderr, "werror is no supported by this format\n");
310 on_write_error = parse_block_error_action(buf, 0);
311 if (on_write_error < 0) {
316 on_read_error = BLOCK_ERR_REPORT;
317 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
318 if (type != IF_IDE && type != IF_VIRTIO && type != IF_NONE) {
319 fprintf(stderr, "rerror is no supported by this format\n");
323 on_read_error = parse_block_error_action(buf, 1);
324 if (on_read_error < 0) {
329 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
330 if (type != IF_VIRTIO) {
331 fprintf(stderr, "addr is not supported\n");
336 /* compute bus and unit according index */
339 if (bus_id != 0 || unit_id != -1) {
341 "qemu: index cannot be used with bus and unit\n");
349 unit_id = index % max_devs;
350 bus_id = index / max_devs;
354 /* if user doesn't specify a unit_id,
355 * try to find the first free
360 while (drive_get(type, bus_id, unit_id) != NULL) {
362 if (max_devs && unit_id >= max_devs) {
371 if (max_devs && unit_id >= max_devs) {
372 fprintf(stderr, "qemu: unit %d too big (max is %d)\n",
373 unit_id, max_devs - 1);
378 * ignore multiple definitions
381 if (drive_get(type, bus_id, unit_id) != NULL) {
388 dinfo = qemu_mallocz(sizeof(*dinfo));
389 if ((buf = qemu_opts_id(opts)) != NULL) {
390 dinfo->id = qemu_strdup(buf);
392 /* no id supplied -> create one */
393 dinfo->id = qemu_mallocz(32);
394 if (type == IF_IDE || type == IF_SCSI)
395 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
397 snprintf(dinfo->id, 32, "%s%i%s%i",
398 devname, bus_id, mediastr, unit_id);
400 snprintf(dinfo->id, 32, "%s%s%i",
401 devname, mediastr, unit_id);
403 dinfo->bdrv = bdrv_new(dinfo->id);
404 dinfo->devaddr = devaddr;
407 dinfo->unit = unit_id;
410 strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
411 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
413 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
423 bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
424 bdrv_set_translation_hint(dinfo->bdrv, translation);
428 bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
433 /* FIXME: This isn't really a floppy, but it's a reasonable
436 bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY);
442 /* add virtio block device */
443 opts = qemu_opts_create(&qemu_device_opts, NULL, 0);
444 qemu_opt_set(opts, "driver", "virtio-blk-pci");
445 qemu_opt_set(opts, "drive", dinfo->id);
447 qemu_opt_set(opts, "addr", devaddr);
452 if (!file || !*file) {
457 /* always use cache=unsafe with snapshot */
458 bdrv_flags &= ~BDRV_O_CACHE_MASK;
459 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
462 if (media == MEDIA_CDROM) {
463 /* CDROM is fine for any interface, don't check. */
465 } else if (ro == 1) {
466 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
467 fprintf(stderr, "qemu: readonly flag not supported for drive with this interface\n");
472 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
474 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
476 fprintf(stderr, "qemu: could not open disk image %s: %s\n",
477 file, strerror(-ret));
481 if (bdrv_key_required(dinfo->bdrv))
487 void do_commit(Monitor *mon, const QDict *qdict)
489 const char *device = qdict_get_str(qdict, "device");
490 BlockDriverState *bs;
492 if (!strcmp(device, "all")) {
495 bs = bdrv_find(device);
497 qerror_report(QERR_DEVICE_NOT_FOUND, device);
504 static int eject_device(Monitor *mon, BlockDriverState *bs, int force)
507 if (!bdrv_is_removable(bs)) {
508 qerror_report(QERR_DEVICE_NOT_REMOVABLE,
509 bdrv_get_device_name(bs));
512 if (bdrv_is_locked(bs)) {
513 qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
521 int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data)
523 BlockDriverState *bs;
524 int force = qdict_get_try_bool(qdict, "force", 0);
525 const char *filename = qdict_get_str(qdict, "device");
527 bs = bdrv_find(filename);
529 qerror_report(QERR_DEVICE_NOT_FOUND, filename);
532 return eject_device(mon, bs, force);
535 int do_block_set_passwd(Monitor *mon, const QDict *qdict,
538 BlockDriverState *bs;
541 bs = bdrv_find(qdict_get_str(qdict, "device"));
543 qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
547 err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
548 if (err == -EINVAL) {
549 qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
551 } else if (err < 0) {
552 qerror_report(QERR_INVALID_PASSWORD);
559 int do_change_block(Monitor *mon, const char *device,
560 const char *filename, const char *fmt)
562 BlockDriverState *bs;
563 BlockDriver *drv = NULL;
566 bs = bdrv_find(device);
568 qerror_report(QERR_DEVICE_NOT_FOUND, device);
572 drv = bdrv_find_whitelisted_format(fmt);
574 qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt);
578 if (eject_device(mon, bs, 0) < 0) {
581 bdrv_flags = bdrv_get_type_hint(bs) == BDRV_TYPE_CDROM ? 0 : BDRV_O_RDWR;
582 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
583 qerror_report(QERR_OPEN_FILE_FAILED, filename);
586 return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);