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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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if (dinfo->auto_del) {
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drive_uninit(dinfo); |
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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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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); |
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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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DriveInfo *drive_get(BlockInterfaceType type, int bus, int unit) |
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{ |
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DriveInfo *dinfo; |
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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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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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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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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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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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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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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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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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} |
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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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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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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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#ifdef CONFIG_LINUX_AIO
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if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
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if (!strcmp(buf, "native")) { |
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bdrv_flags |= BDRV_O_NATIVE_AIO; |
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} 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; |
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} |
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} |
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#endif
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if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
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if (strcmp(buf, "?") == 0) { |
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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; |
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} |
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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; |
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} |
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} |
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on_write_error = BLOCK_ERR_STOP_ENOSPC; |
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if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
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if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
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fprintf(stderr, "werror is not supported by this format\n");
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return NULL; |
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} |
320 |
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on_write_error = parse_block_error_action(buf, 0);
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if (on_write_error < 0) { |
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return NULL; |
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} |
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} |
326 |
|
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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_SCSI && type != IF_NONE) {
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fprintf(stderr, "rerror is not supported by this format\n");
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return NULL; |
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} |
333 |
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on_read_error = parse_block_error_action(buf, 1);
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if (on_read_error < 0) { |
336 |
return NULL; |
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} |
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} |
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|
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if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
341 |
if (type != IF_VIRTIO) {
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fprintf(stderr, "addr is not supported\n");
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return NULL; |
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} |
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} |
346 |
|
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/* 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 {
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360 |
unit_id = index % max_devs; |
361 |
bus_id = index / max_devs; |
362 |
} |
363 |
} |
364 |
|
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/* if user doesn't specify a unit_id,
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* try to find the first free
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*/
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368 |
|
369 |
if (unit_id == -1) { |
370 |
unit_id = 0;
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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 */
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381 |
|
382 |
if (max_devs && unit_id >= max_devs) {
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383 |
fprintf(stderr, "qemu: unit %d too big (max is %d)\n",
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384 |
unit_id, max_devs - 1);
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385 |
return NULL; |
386 |
} |
387 |
|
388 |
/*
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389 |
* ignore multiple definitions
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390 |
*/
|
391 |
|
392 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
393 |
*fatal_error = 0;
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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 */
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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 |
} |