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);
21 * We automatically delete the drive when a device using it gets
22 * unplugged. Questionable feature, but we can't just drop it.
23 * Device models call blockdev_mark_auto_del() to schedule the
24 * automatic deletion, and generic qdev code calls blockdev_auto_del()
25 * when deletion is actually safe.
27 void blockdev_mark_auto_del(BlockDriverState *bs)
29 DriveInfo *dinfo = drive_get_by_blockdev(bs);
34 void blockdev_auto_del(BlockDriverState *bs)
36 DriveInfo *dinfo = drive_get_by_blockdev(bs);
38 if (dinfo->auto_del) {
43 QemuOpts *drive_add(const char *file, const char *fmt, ...)
50 vsnprintf(optstr, sizeof(optstr), fmt, ap);
53 opts = qemu_opts_parse(&qemu_drive_opts, optstr, 0);
58 qemu_opt_set(opts, "file", file);
62 DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit)
66 /* seek interface, bus and unit */
68 QTAILQ_FOREACH(dinfo, &drives, next) {
69 if (dinfo->type == type &&
78 int drive_get_max_bus(BlockInterfaceType type)
84 QTAILQ_FOREACH(dinfo, &drives, next) {
85 if(dinfo->type == type &&
92 DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
96 QTAILQ_FOREACH(dinfo, &drives, next) {
97 if (dinfo->bdrv == bs) {
104 static void bdrv_format_print(void *opaque, const char *name)
106 fprintf(stderr, " %s", name);
109 void drive_uninit(DriveInfo *dinfo)
111 qemu_opts_del(dinfo->opts);
112 bdrv_delete(dinfo->bdrv);
113 QTAILQ_REMOVE(&drives, dinfo, next);
117 static int parse_block_error_action(const char *buf, int is_read)
119 if (!strcmp(buf, "ignore")) {
120 return BLOCK_ERR_IGNORE;
121 } else if (!is_read && !strcmp(buf, "enospc")) {
122 return BLOCK_ERR_STOP_ENOSPC;
123 } else if (!strcmp(buf, "stop")) {
124 return BLOCK_ERR_STOP_ANY;
125 } else if (!strcmp(buf, "report")) {
126 return BLOCK_ERR_REPORT;
128 fprintf(stderr, "qemu: '%s' invalid %s error action\n",
129 buf, is_read ? "read" : "write");
134 DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error)
137 const char *file = NULL;
140 const char *mediastr = "";
141 BlockInterfaceType type;
142 enum { MEDIA_DISK, MEDIA_CDROM } media;
144 int cyls, heads, secs, translation;
145 BlockDriver *drv = NULL;
150 int on_read_error, on_write_error;
158 translation = BIOS_ATA_TRANSLATION_AUTO;
160 if (default_to_scsi) {
162 max_devs = MAX_SCSI_DEVS;
163 pstrcpy(devname, sizeof(devname), "scsi");
166 max_devs = MAX_IDE_DEVS;
167 pstrcpy(devname, sizeof(devname), "ide");
171 /* extract parameters */
172 bus_id = qemu_opt_get_number(opts, "bus", 0);
173 unit_id = qemu_opt_get_number(opts, "unit", -1);
174 index = qemu_opt_get_number(opts, "index", -1);
176 cyls = qemu_opt_get_number(opts, "cyls", 0);
177 heads = qemu_opt_get_number(opts, "heads", 0);
178 secs = qemu_opt_get_number(opts, "secs", 0);
180 snapshot = qemu_opt_get_bool(opts, "snapshot", 0);
181 ro = qemu_opt_get_bool(opts, "readonly", 0);
183 file = qemu_opt_get(opts, "file");
184 serial = qemu_opt_get(opts, "serial");
186 if ((buf = qemu_opt_get(opts, "if")) != NULL) {
187 pstrcpy(devname, sizeof(devname), buf);
188 if (!strcmp(buf, "ide")) {
190 max_devs = MAX_IDE_DEVS;
191 } else if (!strcmp(buf, "scsi")) {
193 max_devs = MAX_SCSI_DEVS;
194 } else if (!strcmp(buf, "floppy")) {
197 } else if (!strcmp(buf, "pflash")) {
200 } else if (!strcmp(buf, "mtd")) {
203 } else if (!strcmp(buf, "sd")) {
206 } else if (!strcmp(buf, "virtio")) {
209 } else if (!strcmp(buf, "xen")) {
212 } else if (!strcmp(buf, "none")) {
216 fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf);
221 if (cyls || heads || secs) {
222 if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
223 fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
226 if (heads < 1 || (type == IF_IDE && heads > 16)) {
227 fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
230 if (secs < 1 || (type == IF_IDE && secs > 63)) {
231 fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
236 if ((buf = qemu_opt_get(opts, "trans")) != NULL) {
239 "qemu: '%s' trans must be used with cyls,heads and secs\n",
243 if (!strcmp(buf, "none"))
244 translation = BIOS_ATA_TRANSLATION_NONE;
245 else if (!strcmp(buf, "lba"))
246 translation = BIOS_ATA_TRANSLATION_LBA;
247 else if (!strcmp(buf, "auto"))
248 translation = BIOS_ATA_TRANSLATION_AUTO;
250 fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
255 if ((buf = qemu_opt_get(opts, "media")) != NULL) {
256 if (!strcmp(buf, "disk")) {
258 } else if (!strcmp(buf, "cdrom")) {
259 if (cyls || secs || heads) {
261 "qemu: '%s' invalid physical CHS format\n", buf);
266 fprintf(stderr, "qemu: '%s' invalid media\n", buf);
271 if ((buf = qemu_opt_get(opts, "cache")) != NULL) {
272 if (!strcmp(buf, "off") || !strcmp(buf, "none")) {
273 bdrv_flags |= BDRV_O_NOCACHE;
274 } else if (!strcmp(buf, "writeback")) {
275 bdrv_flags |= BDRV_O_CACHE_WB;
276 } else if (!strcmp(buf, "unsafe")) {
277 bdrv_flags |= BDRV_O_CACHE_WB;
278 bdrv_flags |= BDRV_O_NO_FLUSH;
279 } else if (!strcmp(buf, "writethrough")) {
280 /* this is the default */
282 fprintf(stderr, "qemu: invalid cache option\n");
287 #ifdef CONFIG_LINUX_AIO
288 if ((buf = qemu_opt_get(opts, "aio")) != NULL) {
289 if (!strcmp(buf, "native")) {
290 bdrv_flags |= BDRV_O_NATIVE_AIO;
291 } else if (!strcmp(buf, "threads")) {
292 /* this is the default */
294 fprintf(stderr, "qemu: invalid aio option\n");
300 if ((buf = qemu_opt_get(opts, "format")) != NULL) {
301 if (strcmp(buf, "?") == 0) {
302 fprintf(stderr, "qemu: Supported formats:");
303 bdrv_iterate_format(bdrv_format_print, NULL);
304 fprintf(stderr, "\n");
307 drv = bdrv_find_whitelisted_format(buf);
309 fprintf(stderr, "qemu: '%s' invalid format\n", buf);
314 on_write_error = BLOCK_ERR_STOP_ENOSPC;
315 if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
316 if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
317 fprintf(stderr, "werror is no supported by this format\n");
321 on_write_error = parse_block_error_action(buf, 0);
322 if (on_write_error < 0) {
327 on_read_error = BLOCK_ERR_REPORT;
328 if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
329 if (type != IF_IDE && type != IF_VIRTIO && type != IF_NONE) {
330 fprintf(stderr, "rerror is no supported by this format\n");
334 on_read_error = parse_block_error_action(buf, 1);
335 if (on_read_error < 0) {
340 if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
341 if (type != IF_VIRTIO) {
342 fprintf(stderr, "addr is not supported\n");
347 /* compute bus and unit according index */
350 if (bus_id != 0 || unit_id != -1) {
352 "qemu: index cannot be used with bus and unit\n");
360 unit_id = index % max_devs;
361 bus_id = index / max_devs;
365 /* if user doesn't specify a unit_id,
366 * try to find the first free
371 while (drive_get(type, bus_id, unit_id) != NULL) {
373 if (max_devs && unit_id >= max_devs) {
382 if (max_devs && unit_id >= max_devs) {
383 fprintf(stderr, "qemu: unit %d too big (max is %d)\n",
384 unit_id, max_devs - 1);
389 * ignore multiple definitions
392 if (drive_get(type, bus_id, unit_id) != NULL) {
399 dinfo = qemu_mallocz(sizeof(*dinfo));
400 if ((buf = qemu_opts_id(opts)) != NULL) {
401 dinfo->id = qemu_strdup(buf);
403 /* no id supplied -> create one */
404 dinfo->id = qemu_mallocz(32);
405 if (type == IF_IDE || type == IF_SCSI)
406 mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
408 snprintf(dinfo->id, 32, "%s%i%s%i",
409 devname, bus_id, mediastr, unit_id);
411 snprintf(dinfo->id, 32, "%s%s%i",
412 devname, mediastr, unit_id);
414 dinfo->bdrv = bdrv_new(dinfo->id);
415 dinfo->devaddr = devaddr;
418 dinfo->unit = unit_id;
421 strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
422 QTAILQ_INSERT_TAIL(&drives, dinfo, next);
424 bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
434 bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
435 bdrv_set_translation_hint(dinfo->bdrv, translation);
439 bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
444 /* FIXME: This isn't really a floppy, but it's a reasonable
447 bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY);
453 /* add virtio block device */
454 opts = qemu_opts_create(&qemu_device_opts, NULL, 0);
455 qemu_opt_set(opts, "driver", "virtio-blk-pci");
456 qemu_opt_set(opts, "drive", dinfo->id);
458 qemu_opt_set(opts, "addr", devaddr);
463 if (!file || !*file) {
468 /* always use cache=unsafe with snapshot */
469 bdrv_flags &= ~BDRV_O_CACHE_MASK;
470 bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
473 if (media == MEDIA_CDROM) {
474 /* CDROM is fine for any interface, don't check. */
476 } else if (ro == 1) {
477 if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
478 fprintf(stderr, "qemu: readonly flag not supported for drive with this interface\n");
483 bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
485 ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
487 fprintf(stderr, "qemu: could not open disk image %s: %s\n",
488 file, strerror(-ret));
492 if (bdrv_key_required(dinfo->bdrv))
498 void do_commit(Monitor *mon, const QDict *qdict)
500 const char *device = qdict_get_str(qdict, "device");
501 BlockDriverState *bs;
503 if (!strcmp(device, "all")) {
506 bs = bdrv_find(device);
508 qerror_report(QERR_DEVICE_NOT_FOUND, device);
515 static int eject_device(Monitor *mon, BlockDriverState *bs, int force)
518 if (!bdrv_is_removable(bs)) {
519 qerror_report(QERR_DEVICE_NOT_REMOVABLE,
520 bdrv_get_device_name(bs));
523 if (bdrv_is_locked(bs)) {
524 qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
532 int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data)
534 BlockDriverState *bs;
535 int force = qdict_get_try_bool(qdict, "force", 0);
536 const char *filename = qdict_get_str(qdict, "device");
538 bs = bdrv_find(filename);
540 qerror_report(QERR_DEVICE_NOT_FOUND, filename);
543 return eject_device(mon, bs, force);
546 int do_block_set_passwd(Monitor *mon, const QDict *qdict,
549 BlockDriverState *bs;
552 bs = bdrv_find(qdict_get_str(qdict, "device"));
554 qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
558 err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
559 if (err == -EINVAL) {
560 qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
562 } else if (err < 0) {
563 qerror_report(QERR_INVALID_PASSWORD);
570 int do_change_block(Monitor *mon, const char *device,
571 const char *filename, const char *fmt)
573 BlockDriverState *bs;
574 BlockDriver *drv = NULL;
577 bs = bdrv_find(device);
579 qerror_report(QERR_DEVICE_NOT_FOUND, device);
583 drv = bdrv_find_whitelisted_format(fmt);
585 qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt);
589 if (eject_device(mon, bs, 0) < 0) {
592 bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
593 if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
594 qerror_report(QERR_OPEN_FILE_FAILED, filename);
597 return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);