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/*
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* QEMU host block devices
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or
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* later. See the COPYING file in the top-level directory.
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*/
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#include "block.h" |
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#include "blockdev.h" |
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#include "monitor.h" |
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#include "qerror.h" |
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#include "qemu-option.h" |
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#include "qemu-config.h" |
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#include "sysemu.h" |
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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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/*
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* We automatically delete the drive when a device using it gets
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* unplugged. Questionable feature, but we can't just drop it.
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* Device models call blockdev_mark_auto_del() to schedule the
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* automatic deletion, and generic qdev code calls blockdev_auto_del()
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* when deletion is actually safe.
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*/
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void blockdev_mark_auto_del(BlockDriverState *bs)
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{
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DriveInfo *dinfo = drive_get_by_blockdev(bs); |
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dinfo->auto_del = 1;
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} |
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void blockdev_auto_del(BlockDriverState *bs)
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{
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DriveInfo *dinfo = drive_get_by_blockdev(bs); |
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|
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if (dinfo->auto_del) {
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drive_uninit(dinfo); |
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} |
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} |
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|
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QemuOpts *drive_add(const char *file, const char *fmt, ...) |
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{
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va_list ap; |
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char optstr[1024]; |
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QemuOpts *opts; |
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|
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va_start(ap, fmt); |
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vsnprintf(optstr, sizeof(optstr), fmt, ap);
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va_end(ap); |
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opts = qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); |
| 54 |
if (!opts) {
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return NULL; |
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} |
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if (file)
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qemu_opt_set(opts, "file", file);
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return opts;
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} |
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|
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DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) |
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{
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DriveInfo *dinfo; |
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|
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/* seek interface, bus and unit */
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (dinfo->type == type &&
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dinfo->bus == bus && |
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dinfo->unit == unit) |
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return dinfo;
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} |
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return NULL; |
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} |
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|
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int drive_get_max_bus(BlockInterfaceType type)
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{
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int max_bus;
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DriveInfo *dinfo; |
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|
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max_bus = -1;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if(dinfo->type == type &&
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dinfo->bus > max_bus) |
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max_bus = dinfo->bus; |
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} |
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return max_bus;
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} |
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|
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DriveInfo *drive_get_by_blockdev(BlockDriverState *bs) |
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{
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DriveInfo *dinfo; |
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QTAILQ_FOREACH(dinfo, &drives, next) {
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if (dinfo->bdrv == bs) {
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return dinfo;
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} |
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} |
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return NULL; |
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} |
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static void bdrv_format_print(void *opaque, const char *name) |
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{
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fprintf(stderr, " %s", name);
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} |
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void drive_uninit(DriveInfo *dinfo)
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{
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qemu_opts_del(dinfo->opts); |
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bdrv_delete(dinfo->bdrv); |
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QTAILQ_REMOVE(&drives, dinfo, next); |
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qemu_free(dinfo); |
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} |
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|
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static int parse_block_error_action(const char *buf, int is_read) |
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{
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if (!strcmp(buf, "ignore")) { |
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return BLOCK_ERR_IGNORE;
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} else if (!is_read && !strcmp(buf, "enospc")) { |
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return BLOCK_ERR_STOP_ENOSPC;
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} else if (!strcmp(buf, "stop")) { |
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return BLOCK_ERR_STOP_ANY;
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} else if (!strcmp(buf, "report")) { |
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return BLOCK_ERR_REPORT;
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} else {
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fprintf(stderr, "qemu: '%s' invalid %s error action\n",
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buf, is_read ? "read" : "write"); |
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return -1; |
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} |
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} |
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DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi, int *fatal_error) |
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{
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const char *buf; |
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const char *file = NULL; |
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char devname[128]; |
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const char *serial; |
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const char *mediastr = ""; |
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BlockInterfaceType type; |
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enum { MEDIA_DISK, MEDIA_CDROM } media;
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int bus_id, unit_id;
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int cyls, heads, secs, translation;
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BlockDriver *drv = NULL;
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int max_devs;
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int index;
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int ro = 0; |
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int bdrv_flags = 0; |
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int on_read_error, on_write_error;
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const char *devaddr; |
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DriveInfo *dinfo; |
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int snapshot = 0; |
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int ret;
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*fatal_error = 1;
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translation = BIOS_ATA_TRANSLATION_AUTO; |
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|
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if (default_to_scsi) {
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type = IF_SCSI; |
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max_devs = MAX_SCSI_DEVS; |
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pstrcpy(devname, sizeof(devname), "scsi"); |
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} else {
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type = IF_IDE; |
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max_devs = MAX_IDE_DEVS; |
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pstrcpy(devname, sizeof(devname), "ide"); |
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} |
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media = MEDIA_DISK; |
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/* extract parameters */
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bus_id = qemu_opt_get_number(opts, "bus", 0); |
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unit_id = qemu_opt_get_number(opts, "unit", -1); |
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index = qemu_opt_get_number(opts, "index", -1); |
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cyls = qemu_opt_get_number(opts, "cyls", 0); |
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heads = qemu_opt_get_number(opts, "heads", 0); |
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secs = qemu_opt_get_number(opts, "secs", 0); |
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snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
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ro = qemu_opt_get_bool(opts, "readonly", 0); |
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file = qemu_opt_get(opts, "file");
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serial = qemu_opt_get(opts, "serial");
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if ((buf = qemu_opt_get(opts, "if")) != NULL) { |
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pstrcpy(devname, sizeof(devname), buf);
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if (!strcmp(buf, "ide")) { |
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type = IF_IDE; |
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max_devs = MAX_IDE_DEVS; |
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} else if (!strcmp(buf, "scsi")) { |
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type = IF_SCSI; |
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max_devs = MAX_SCSI_DEVS; |
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} else if (!strcmp(buf, "floppy")) { |
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type = IF_FLOPPY; |
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max_devs = 0;
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} else if (!strcmp(buf, "pflash")) { |
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type = IF_PFLASH; |
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max_devs = 0;
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} else if (!strcmp(buf, "mtd")) { |
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type = IF_MTD; |
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max_devs = 0;
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} else if (!strcmp(buf, "sd")) { |
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type = IF_SD; |
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max_devs = 0;
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} else if (!strcmp(buf, "virtio")) { |
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type = IF_VIRTIO; |
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max_devs = 0;
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} else if (!strcmp(buf, "xen")) { |
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type = IF_XEN; |
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max_devs = 0;
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} else if (!strcmp(buf, "none")) { |
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type = IF_NONE; |
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max_devs = 0;
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} else {
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fprintf(stderr, "qemu: unsupported bus type '%s'\n", buf);
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return NULL; |
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} |
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} |
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|
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if (cyls || heads || secs) {
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if (cyls < 1 || (type == IF_IDE && cyls > 16383)) { |
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fprintf(stderr, "qemu: '%s' invalid physical cyls number\n", buf);
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return NULL; |
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} |
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if (heads < 1 || (type == IF_IDE && heads > 16)) { |
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fprintf(stderr, "qemu: '%s' invalid physical heads number\n", buf);
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return NULL; |
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} |
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if (secs < 1 || (type == IF_IDE && secs > 63)) { |
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fprintf(stderr, "qemu: '%s' invalid physical secs number\n", buf);
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return NULL; |
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} |
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} |
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|
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if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
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if (!cyls) {
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fprintf(stderr, |
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"qemu: '%s' trans must be used with cyls,heads and secs\n",
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buf); |
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return NULL; |
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} |
| 243 |
if (!strcmp(buf, "none")) |
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translation = BIOS_ATA_TRANSLATION_NONE; |
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else if (!strcmp(buf, "lba")) |
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translation = BIOS_ATA_TRANSLATION_LBA; |
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else if (!strcmp(buf, "auto")) |
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translation = BIOS_ATA_TRANSLATION_AUTO; |
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else {
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fprintf(stderr, "qemu: '%s' invalid translation type\n", buf);
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return NULL; |
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} |
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} |
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|
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if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
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if (!strcmp(buf, "disk")) { |
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media = MEDIA_DISK; |
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} else if (!strcmp(buf, "cdrom")) { |
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if (cyls || secs || heads) {
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fprintf(stderr, |
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"qemu: '%s' invalid physical CHS format\n", buf);
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return NULL; |
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} |
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media = MEDIA_CDROM; |
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} else {
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fprintf(stderr, "qemu: '%s' invalid media\n", buf);
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return NULL; |
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} |
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} |
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|
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if ((buf = qemu_opt_get(opts, "cache")) != NULL) { |
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if (!strcmp(buf, "off") || !strcmp(buf, "none")) { |
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bdrv_flags |= BDRV_O_NOCACHE; |
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} else if (!strcmp(buf, "writeback")) { |
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bdrv_flags |= BDRV_O_CACHE_WB; |
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} else if (!strcmp(buf, "unsafe")) { |
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bdrv_flags |= BDRV_O_CACHE_WB; |
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bdrv_flags |= BDRV_O_NO_FLUSH; |
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} else if (!strcmp(buf, "writethrough")) { |
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/* this is the default */
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} else {
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fprintf(stderr, "qemu: invalid cache option\n");
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return NULL; |
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} |
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} |
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|
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#ifdef CONFIG_LINUX_AIO
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if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
| 289 |
if (!strcmp(buf, "native")) { |
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bdrv_flags |= BDRV_O_NATIVE_AIO; |
| 291 |
} else if (!strcmp(buf, "threads")) { |
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/* this is the default */
|
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} else {
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fprintf(stderr, "qemu: invalid aio option\n");
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return NULL; |
| 296 |
} |
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} |
| 298 |
#endif
|
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|
| 300 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
| 301 |
if (strcmp(buf, "?") == 0) { |
| 302 |
fprintf(stderr, "qemu: Supported formats:");
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bdrv_iterate_format(bdrv_format_print, NULL);
|
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fprintf(stderr, "\n");
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return NULL; |
| 306 |
} |
| 307 |
drv = bdrv_find_whitelisted_format(buf); |
| 308 |
if (!drv) {
|
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fprintf(stderr, "qemu: '%s' invalid format\n", buf);
|
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return NULL; |
| 311 |
} |
| 312 |
} |
| 313 |
|
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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) {
|
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fprintf(stderr, "werror is no supported by this format\n");
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return NULL; |
| 319 |
} |
| 320 |
|
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on_write_error = parse_block_error_action(buf, 0);
|
| 322 |
if (on_write_error < 0) { |
| 323 |
return NULL; |
| 324 |
} |
| 325 |
} |
| 326 |
|
| 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");
|
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return NULL; |
| 332 |
} |
| 333 |
|
| 334 |
on_read_error = parse_block_error_action(buf, 1);
|
| 335 |
if (on_read_error < 0) { |
| 336 |
return NULL; |
| 337 |
} |
| 338 |
} |
| 339 |
|
| 340 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
| 341 |
if (type != IF_VIRTIO) {
|
| 342 |
fprintf(stderr, "addr is not supported\n");
|
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return NULL; |
| 344 |
} |
| 345 |
} |
| 346 |
|
| 347 |
/* compute bus and unit according index */
|
| 348 |
|
| 349 |
if (index != -1) { |
| 350 |
if (bus_id != 0 || unit_id != -1) { |
| 351 |
fprintf(stderr, |
| 352 |
"qemu: index cannot be used with bus and unit\n");
|
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return NULL; |
| 354 |
} |
| 355 |
if (max_devs == 0) |
| 356 |
{
|
| 357 |
unit_id = index; |
| 358 |
bus_id = 0;
|
| 359 |
} else {
|
| 360 |
unit_id = index % max_devs; |
| 361 |
bus_id = index / max_devs; |
| 362 |
} |
| 363 |
} |
| 364 |
|
| 365 |
/* if user doesn't specify a unit_id,
|
| 366 |
* try to find the first free
|
| 367 |
*/
|
| 368 |
|
| 369 |
if (unit_id == -1) { |
| 370 |
unit_id = 0;
|
| 371 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
| 372 |
unit_id++; |
| 373 |
if (max_devs && unit_id >= max_devs) {
|
| 374 |
unit_id -= max_devs; |
| 375 |
bus_id++; |
| 376 |
} |
| 377 |
} |
| 378 |
} |
| 379 |
|
| 380 |
/* check unit id */
|
| 381 |
|
| 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);
|
| 385 |
return NULL; |
| 386 |
} |
| 387 |
|
| 388 |
/*
|
| 389 |
* ignore multiple definitions
|
| 390 |
*/
|
| 391 |
|
| 392 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
| 393 |
*fatal_error = 0;
|
| 394 |
return NULL; |
| 395 |
} |
| 396 |
|
| 397 |
/* init */
|
| 398 |
|
| 399 |
dinfo = qemu_mallocz(sizeof(*dinfo));
|
| 400 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
| 401 |
dinfo->id = qemu_strdup(buf); |
| 402 |
} else {
|
| 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"; |
| 407 |
if (max_devs)
|
| 408 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
| 409 |
devname, bus_id, mediastr, unit_id); |
| 410 |
else
|
| 411 |
snprintf(dinfo->id, 32, "%s%s%i", |
| 412 |
devname, mediastr, unit_id); |
| 413 |
} |
| 414 |
dinfo->bdrv = bdrv_new(dinfo->id); |
| 415 |
dinfo->devaddr = devaddr; |
| 416 |
dinfo->type = type; |
| 417 |
dinfo->bus = bus_id; |
| 418 |
dinfo->unit = unit_id; |
| 419 |
dinfo->opts = opts; |
| 420 |
if (serial)
|
| 421 |
strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); |
| 422 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
| 423 |
|
| 424 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
| 425 |
|
| 426 |
switch(type) {
|
| 427 |
case IF_IDE:
|
| 428 |
case IF_SCSI:
|
| 429 |
case IF_XEN:
|
| 430 |
case IF_NONE:
|
| 431 |
switch(media) {
|
| 432 |
case MEDIA_DISK:
|
| 433 |
if (cyls != 0) { |
| 434 |
bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); |
| 435 |
bdrv_set_translation_hint(dinfo->bdrv, translation); |
| 436 |
} |
| 437 |
break;
|
| 438 |
case MEDIA_CDROM:
|
| 439 |
bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM); |
| 440 |
break;
|
| 441 |
} |
| 442 |
break;
|
| 443 |
case IF_SD:
|
| 444 |
/* FIXME: This isn't really a floppy, but it's a reasonable
|
| 445 |
approximation. */
|
| 446 |
case IF_FLOPPY:
|
| 447 |
bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY); |
| 448 |
break;
|
| 449 |
case IF_PFLASH:
|
| 450 |
case IF_MTD:
|
| 451 |
break;
|
| 452 |
case IF_VIRTIO:
|
| 453 |
/* add virtio block device */
|
| 454 |
opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); |
| 455 |
qemu_opt_set(opts, "driver", "virtio-blk-pci"); |
| 456 |
qemu_opt_set(opts, "drive", dinfo->id);
|
| 457 |
if (devaddr)
|
| 458 |
qemu_opt_set(opts, "addr", devaddr);
|
| 459 |
break;
|
| 460 |
case IF_COUNT:
|
| 461 |
abort(); |
| 462 |
} |
| 463 |
if (!file || !*file) {
|
| 464 |
*fatal_error = 0;
|
| 465 |
return NULL; |
| 466 |
} |
| 467 |
if (snapshot) {
|
| 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); |
| 471 |
} |
| 472 |
|
| 473 |
if (media == MEDIA_CDROM) {
|
| 474 |
/* CDROM is fine for any interface, don't check. */
|
| 475 |
ro = 1;
|
| 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");
|
| 479 |
return NULL; |
| 480 |
} |
| 481 |
} |
| 482 |
|
| 483 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
| 484 |
|
| 485 |
ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); |
| 486 |
if (ret < 0) { |
| 487 |
fprintf(stderr, "qemu: could not open disk image %s: %s\n",
|
| 488 |
file, strerror(-ret)); |
| 489 |
return NULL; |
| 490 |
} |
| 491 |
|
| 492 |
if (bdrv_key_required(dinfo->bdrv))
|
| 493 |
autostart = 0;
|
| 494 |
*fatal_error = 0;
|
| 495 |
return dinfo;
|
| 496 |
} |
| 497 |
|
| 498 |
void do_commit(Monitor *mon, const QDict *qdict) |
| 499 |
{
|
| 500 |
const char *device = qdict_get_str(qdict, "device"); |
| 501 |
BlockDriverState *bs; |
| 502 |
|
| 503 |
if (!strcmp(device, "all")) { |
| 504 |
bdrv_commit_all(); |
| 505 |
} else {
|
| 506 |
bs = bdrv_find(device); |
| 507 |
if (!bs) {
|
| 508 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 509 |
return;
|
| 510 |
} |
| 511 |
bdrv_commit(bs); |
| 512 |
} |
| 513 |
} |
| 514 |
|
| 515 |
static int eject_device(Monitor *mon, BlockDriverState *bs, int force) |
| 516 |
{
|
| 517 |
if (!force) {
|
| 518 |
if (!bdrv_is_removable(bs)) {
|
| 519 |
qerror_report(QERR_DEVICE_NOT_REMOVABLE, |
| 520 |
bdrv_get_device_name(bs)); |
| 521 |
return -1; |
| 522 |
} |
| 523 |
if (bdrv_is_locked(bs)) {
|
| 524 |
qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
| 525 |
return -1; |
| 526 |
} |
| 527 |
} |
| 528 |
bdrv_close(bs); |
| 529 |
return 0; |
| 530 |
} |
| 531 |
|
| 532 |
int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 533 |
{
|
| 534 |
BlockDriverState *bs; |
| 535 |
int force = qdict_get_try_bool(qdict, "force", 0); |
| 536 |
const char *filename = qdict_get_str(qdict, "device"); |
| 537 |
|
| 538 |
bs = bdrv_find(filename); |
| 539 |
if (!bs) {
|
| 540 |
qerror_report(QERR_DEVICE_NOT_FOUND, filename); |
| 541 |
return -1; |
| 542 |
} |
| 543 |
return eject_device(mon, bs, force);
|
| 544 |
} |
| 545 |
|
| 546 |
int do_block_set_passwd(Monitor *mon, const QDict *qdict, |
| 547 |
QObject **ret_data) |
| 548 |
{
|
| 549 |
BlockDriverState *bs; |
| 550 |
int err;
|
| 551 |
|
| 552 |
bs = bdrv_find(qdict_get_str(qdict, "device"));
|
| 553 |
if (!bs) {
|
| 554 |
qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
|
| 555 |
return -1; |
| 556 |
} |
| 557 |
|
| 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)); |
| 561 |
return -1; |
| 562 |
} else if (err < 0) { |
| 563 |
qerror_report(QERR_INVALID_PASSWORD); |
| 564 |
return -1; |
| 565 |
} |
| 566 |
|
| 567 |
return 0; |
| 568 |
} |
| 569 |
|
| 570 |
int do_change_block(Monitor *mon, const char *device, |
| 571 |
const char *filename, const char *fmt) |
| 572 |
{
|
| 573 |
BlockDriverState *bs; |
| 574 |
BlockDriver *drv = NULL;
|
| 575 |
int bdrv_flags;
|
| 576 |
|
| 577 |
bs = bdrv_find(device); |
| 578 |
if (!bs) {
|
| 579 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 580 |
return -1; |
| 581 |
} |
| 582 |
if (fmt) {
|
| 583 |
drv = bdrv_find_whitelisted_format(fmt); |
| 584 |
if (!drv) {
|
| 585 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt); |
| 586 |
return -1; |
| 587 |
} |
| 588 |
} |
| 589 |
if (eject_device(mon, bs, 0) < 0) { |
| 590 |
return -1; |
| 591 |
} |
| 592 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
| 593 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
| 594 |
if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { |
| 595 |
qerror_report(QERR_OPEN_FILE_FAILED, filename); |
| 596 |
return -1; |
| 597 |
} |
| 598 |
return monitor_read_bdrv_key_start(mon, bs, NULL, NULL); |
| 599 |
} |