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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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#include "hw/qdev.h" |
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#include "block_int.h" |
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|
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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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static const char *const if_name[IF_COUNT] = { |
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[IF_NONE] = "none",
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[IF_IDE] = "ide",
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[IF_SCSI] = "scsi",
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[IF_FLOPPY] = "floppy",
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[IF_PFLASH] = "pflash",
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[IF_MTD] = "mtd",
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[IF_SD] = "sd",
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[IF_VIRTIO] = "virtio",
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[IF_XEN] = "xen",
|
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}; |
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|
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static const int if_max_devs[IF_COUNT] = { |
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/*
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* Do not change these numbers! They govern how drive option
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* index maps to unit and bus. That mapping is ABI.
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*
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* All controllers used to imlement if=T drives need to support
|
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* if_max_devs[T] units, for any T with if_max_devs[T] != 0.
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* Otherwise, some index values map to "impossible" bus, unit
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* values.
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*
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* For instance, if you change [IF_SCSI] to 255, -drive
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* if=scsi,index=12 no longer means bus=1,unit=5, but
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* bus=0,unit=12. With an lsi53c895a controller (7 units max),
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* the drive can't be set up. Regression.
|
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*/
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[IF_IDE] = 2,
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[IF_SCSI] = 7,
|
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}; |
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|
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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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|
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if (dinfo) {
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dinfo->auto_del = 1;
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} |
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} |
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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 && 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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static int drive_index_to_bus_id(BlockInterfaceType type, int index) |
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{
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int max_devs = if_max_devs[type];
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return max_devs ? index / max_devs : 0; |
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} |
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|
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static int drive_index_to_unit_id(BlockInterfaceType type, int index) |
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{
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int max_devs = if_max_devs[type];
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return max_devs ? index % max_devs : index;
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} |
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|
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QemuOpts *drive_def(const char *optstr) |
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{
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return qemu_opts_parse(qemu_find_opts("drive"), optstr, 0); |
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} |
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|
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QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file, |
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const char *optstr) |
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{
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QemuOpts *opts; |
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char buf[32]; |
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|
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opts = drive_def(optstr); |
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if (!opts) {
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return NULL; |
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} |
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if (type != IF_DEFAULT) {
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qemu_opt_set(opts, "if", if_name[type]);
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} |
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if (index >= 0) { |
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snprintf(buf, sizeof(buf), "%d", index); |
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qemu_opt_set(opts, "index", buf);
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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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DriveInfo *drive_get_by_index(BlockInterfaceType type, int index)
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{
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return drive_get(type,
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drive_index_to_bus_id(type, index), |
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drive_index_to_unit_id(type, index)); |
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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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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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/* Get a block device. This should only be used for single-drive devices
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(e.g. SD/Floppy/MTD). Multi-disk devices (scsi/ide) should use the
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appropriate bus. */
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DriveInfo *drive_get_next(BlockInterfaceType type) |
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{
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static int next_block_unit[IF_COUNT]; |
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|
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return drive_get(type, 0, next_block_unit[type]++); |
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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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|
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static void bdrv_format_print(void *opaque, const char *name) |
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{
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error_printf(" %s", name);
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} |
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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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error_report("'%s' invalid %s error action",
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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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|
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DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
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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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|
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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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pstrcpy(devname, sizeof(devname), "scsi"); |
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} else {
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type = IF_IDE; |
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pstrcpy(devname, sizeof(devname), "ide"); |
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} |
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media = MEDIA_DISK; |
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|
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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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|
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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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|
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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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|
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file = qemu_opt_get(opts, "file");
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serial = qemu_opt_get(opts, "serial");
|
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|
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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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for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
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; |
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if (type == IF_COUNT) {
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error_report("unsupported bus type '%s'", buf);
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return NULL; |
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} |
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} |
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max_devs = if_max_devs[type]; |
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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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error_report("invalid physical cyls number");
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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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error_report("invalid physical heads number");
|
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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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error_report("invalid physical secs number");
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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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error_report("'%s' trans must be used with cyls,heads and secs",
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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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error_report("'%s' invalid translation type", 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) { |
| 299 |
if (!strcmp(buf, "disk")) { |
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media = MEDIA_DISK; |
| 301 |
} else if (!strcmp(buf, "cdrom")) { |
| 302 |
if (cyls || secs || heads) {
|
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error_report("'%s' invalid physical CHS format", 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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error_report("'%s' invalid media", buf);
|
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return NULL; |
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} |
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} |
| 312 |
|
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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; |
| 318 |
} 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; |
| 321 |
} else if (!strcmp(buf, "writethrough")) { |
| 322 |
/* this is the default */
|
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} else {
|
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error_report("invalid cache option");
|
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return NULL; |
| 326 |
} |
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} |
| 328 |
|
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#ifdef CONFIG_LINUX_AIO
|
| 330 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
| 331 |
if (!strcmp(buf, "native")) { |
| 332 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
| 333 |
} else if (!strcmp(buf, "threads")) { |
| 334 |
/* this is the default */
|
| 335 |
} else {
|
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error_report("invalid aio option");
|
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return NULL; |
| 338 |
} |
| 339 |
} |
| 340 |
#endif
|
| 341 |
|
| 342 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
| 343 |
if (strcmp(buf, "?") == 0) { |
| 344 |
error_printf("Supported formats:");
|
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bdrv_iterate_format(bdrv_format_print, NULL);
|
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error_printf("\n");
|
| 347 |
return NULL; |
| 348 |
} |
| 349 |
drv = bdrv_find_whitelisted_format(buf); |
| 350 |
if (!drv) {
|
| 351 |
error_report("'%s' invalid format", buf);
|
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return NULL; |
| 353 |
} |
| 354 |
} |
| 355 |
|
| 356 |
on_write_error = BLOCK_ERR_STOP_ENOSPC; |
| 357 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
| 358 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
| 359 |
error_report("werror is not supported by this bus type");
|
| 360 |
return NULL; |
| 361 |
} |
| 362 |
|
| 363 |
on_write_error = parse_block_error_action(buf, 0);
|
| 364 |
if (on_write_error < 0) { |
| 365 |
return NULL; |
| 366 |
} |
| 367 |
} |
| 368 |
|
| 369 |
on_read_error = BLOCK_ERR_REPORT; |
| 370 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
| 371 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
| 372 |
error_report("rerror is not supported by this bus type");
|
| 373 |
return NULL; |
| 374 |
} |
| 375 |
|
| 376 |
on_read_error = parse_block_error_action(buf, 1);
|
| 377 |
if (on_read_error < 0) { |
| 378 |
return NULL; |
| 379 |
} |
| 380 |
} |
| 381 |
|
| 382 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
| 383 |
if (type != IF_VIRTIO) {
|
| 384 |
error_report("addr is not supported by this bus type");
|
| 385 |
return NULL; |
| 386 |
} |
| 387 |
} |
| 388 |
|
| 389 |
/* compute bus and unit according index */
|
| 390 |
|
| 391 |
if (index != -1) { |
| 392 |
if (bus_id != 0 || unit_id != -1) { |
| 393 |
error_report("index cannot be used with bus and unit");
|
| 394 |
return NULL; |
| 395 |
} |
| 396 |
bus_id = drive_index_to_bus_id(type, index); |
| 397 |
unit_id = drive_index_to_unit_id(type, index); |
| 398 |
} |
| 399 |
|
| 400 |
/* if user doesn't specify a unit_id,
|
| 401 |
* try to find the first free
|
| 402 |
*/
|
| 403 |
|
| 404 |
if (unit_id == -1) { |
| 405 |
unit_id = 0;
|
| 406 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
| 407 |
unit_id++; |
| 408 |
if (max_devs && unit_id >= max_devs) {
|
| 409 |
unit_id -= max_devs; |
| 410 |
bus_id++; |
| 411 |
} |
| 412 |
} |
| 413 |
} |
| 414 |
|
| 415 |
/* check unit id */
|
| 416 |
|
| 417 |
if (max_devs && unit_id >= max_devs) {
|
| 418 |
error_report("unit %d too big (max is %d)",
|
| 419 |
unit_id, max_devs - 1);
|
| 420 |
return NULL; |
| 421 |
} |
| 422 |
|
| 423 |
/*
|
| 424 |
* catch multiple definitions
|
| 425 |
*/
|
| 426 |
|
| 427 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
| 428 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
| 429 |
bus_id, unit_id, index); |
| 430 |
return NULL; |
| 431 |
} |
| 432 |
|
| 433 |
/* init */
|
| 434 |
|
| 435 |
dinfo = qemu_mallocz(sizeof(*dinfo));
|
| 436 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
| 437 |
dinfo->id = qemu_strdup(buf); |
| 438 |
} else {
|
| 439 |
/* no id supplied -> create one */
|
| 440 |
dinfo->id = qemu_mallocz(32);
|
| 441 |
if (type == IF_IDE || type == IF_SCSI)
|
| 442 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
| 443 |
if (max_devs)
|
| 444 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
| 445 |
devname, bus_id, mediastr, unit_id); |
| 446 |
else
|
| 447 |
snprintf(dinfo->id, 32, "%s%s%i", |
| 448 |
devname, mediastr, unit_id); |
| 449 |
} |
| 450 |
dinfo->bdrv = bdrv_new(dinfo->id); |
| 451 |
dinfo->devaddr = devaddr; |
| 452 |
dinfo->type = type; |
| 453 |
dinfo->bus = bus_id; |
| 454 |
dinfo->unit = unit_id; |
| 455 |
dinfo->opts = opts; |
| 456 |
if (serial)
|
| 457 |
strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1); |
| 458 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
| 459 |
|
| 460 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
| 461 |
|
| 462 |
switch(type) {
|
| 463 |
case IF_IDE:
|
| 464 |
case IF_SCSI:
|
| 465 |
case IF_XEN:
|
| 466 |
case IF_NONE:
|
| 467 |
switch(media) {
|
| 468 |
case MEDIA_DISK:
|
| 469 |
if (cyls != 0) { |
| 470 |
bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs); |
| 471 |
bdrv_set_translation_hint(dinfo->bdrv, translation); |
| 472 |
} |
| 473 |
break;
|
| 474 |
case MEDIA_CDROM:
|
| 475 |
bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM); |
| 476 |
break;
|
| 477 |
} |
| 478 |
break;
|
| 479 |
case IF_SD:
|
| 480 |
/* FIXME: This isn't really a floppy, but it's a reasonable
|
| 481 |
approximation. */
|
| 482 |
case IF_FLOPPY:
|
| 483 |
bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY); |
| 484 |
break;
|
| 485 |
case IF_PFLASH:
|
| 486 |
case IF_MTD:
|
| 487 |
break;
|
| 488 |
case IF_VIRTIO:
|
| 489 |
/* add virtio block device */
|
| 490 |
opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0); |
| 491 |
qemu_opt_set(opts, "driver", "virtio-blk-pci"); |
| 492 |
qemu_opt_set(opts, "drive", dinfo->id);
|
| 493 |
if (devaddr)
|
| 494 |
qemu_opt_set(opts, "addr", devaddr);
|
| 495 |
break;
|
| 496 |
default:
|
| 497 |
abort(); |
| 498 |
} |
| 499 |
if (!file || !*file) {
|
| 500 |
return dinfo;
|
| 501 |
} |
| 502 |
if (snapshot) {
|
| 503 |
/* always use cache=unsafe with snapshot */
|
| 504 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
| 505 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
| 506 |
} |
| 507 |
|
| 508 |
if (media == MEDIA_CDROM) {
|
| 509 |
/* CDROM is fine for any interface, don't check. */
|
| 510 |
ro = 1;
|
| 511 |
} else if (ro == 1) { |
| 512 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
|
| 513 |
error_report("readonly not supported by this bus type");
|
| 514 |
return NULL; |
| 515 |
} |
| 516 |
} |
| 517 |
|
| 518 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
| 519 |
|
| 520 |
ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); |
| 521 |
if (ret < 0) { |
| 522 |
error_report("could not open disk image %s: %s",
|
| 523 |
file, strerror(-ret)); |
| 524 |
return NULL; |
| 525 |
} |
| 526 |
|
| 527 |
if (bdrv_key_required(dinfo->bdrv))
|
| 528 |
autostart = 0;
|
| 529 |
return dinfo;
|
| 530 |
} |
| 531 |
|
| 532 |
void do_commit(Monitor *mon, const QDict *qdict) |
| 533 |
{
|
| 534 |
const char *device = qdict_get_str(qdict, "device"); |
| 535 |
BlockDriverState *bs; |
| 536 |
|
| 537 |
if (!strcmp(device, "all")) { |
| 538 |
bdrv_commit_all(); |
| 539 |
} else {
|
| 540 |
bs = bdrv_find(device); |
| 541 |
if (!bs) {
|
| 542 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 543 |
return;
|
| 544 |
} |
| 545 |
bdrv_commit(bs); |
| 546 |
} |
| 547 |
} |
| 548 |
|
| 549 |
int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 550 |
{
|
| 551 |
const char *device = qdict_get_str(qdict, "device"); |
| 552 |
const char *filename = qdict_get_try_str(qdict, "snapshot_file"); |
| 553 |
const char *format = qdict_get_try_str(qdict, "format"); |
| 554 |
BlockDriverState *bs; |
| 555 |
BlockDriver *drv, *proto_drv; |
| 556 |
int ret = 0; |
| 557 |
int flags;
|
| 558 |
|
| 559 |
if (!filename) {
|
| 560 |
qerror_report(QERR_MISSING_PARAMETER, "snapshot_file");
|
| 561 |
ret = -1;
|
| 562 |
goto out;
|
| 563 |
} |
| 564 |
|
| 565 |
bs = bdrv_find(device); |
| 566 |
if (!bs) {
|
| 567 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 568 |
ret = -1;
|
| 569 |
goto out;
|
| 570 |
} |
| 571 |
|
| 572 |
if (!format) {
|
| 573 |
format = "qcow2";
|
| 574 |
} |
| 575 |
|
| 576 |
drv = bdrv_find_format(format); |
| 577 |
if (!drv) {
|
| 578 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, format); |
| 579 |
ret = -1;
|
| 580 |
goto out;
|
| 581 |
} |
| 582 |
|
| 583 |
proto_drv = bdrv_find_protocol(filename); |
| 584 |
if (!proto_drv) {
|
| 585 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, format); |
| 586 |
ret = -1;
|
| 587 |
goto out;
|
| 588 |
} |
| 589 |
|
| 590 |
ret = bdrv_img_create(filename, format, bs->filename, |
| 591 |
bs->drv->format_name, NULL, -1, bs->open_flags); |
| 592 |
if (ret) {
|
| 593 |
goto out;
|
| 594 |
} |
| 595 |
|
| 596 |
qemu_aio_flush(); |
| 597 |
bdrv_flush(bs); |
| 598 |
|
| 599 |
flags = bs->open_flags; |
| 600 |
bdrv_close(bs); |
| 601 |
ret = bdrv_open(bs, filename, flags, drv); |
| 602 |
/*
|
| 603 |
* If reopening the image file we just created fails, we really
|
| 604 |
* are in trouble :(
|
| 605 |
*/
|
| 606 |
if (ret != 0) { |
| 607 |
abort(); |
| 608 |
} |
| 609 |
out:
|
| 610 |
if (ret) {
|
| 611 |
ret = -1;
|
| 612 |
} |
| 613 |
|
| 614 |
return ret;
|
| 615 |
} |
| 616 |
|
| 617 |
static int eject_device(Monitor *mon, BlockDriverState *bs, int force) |
| 618 |
{
|
| 619 |
if (!force) {
|
| 620 |
if (!bdrv_is_removable(bs)) {
|
| 621 |
qerror_report(QERR_DEVICE_NOT_REMOVABLE, |
| 622 |
bdrv_get_device_name(bs)); |
| 623 |
return -1; |
| 624 |
} |
| 625 |
if (bdrv_is_locked(bs)) {
|
| 626 |
qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
| 627 |
return -1; |
| 628 |
} |
| 629 |
} |
| 630 |
bdrv_close(bs); |
| 631 |
return 0; |
| 632 |
} |
| 633 |
|
| 634 |
int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 635 |
{
|
| 636 |
BlockDriverState *bs; |
| 637 |
int force = qdict_get_try_bool(qdict, "force", 0); |
| 638 |
const char *filename = qdict_get_str(qdict, "device"); |
| 639 |
|
| 640 |
bs = bdrv_find(filename); |
| 641 |
if (!bs) {
|
| 642 |
qerror_report(QERR_DEVICE_NOT_FOUND, filename); |
| 643 |
return -1; |
| 644 |
} |
| 645 |
return eject_device(mon, bs, force);
|
| 646 |
} |
| 647 |
|
| 648 |
int do_block_set_passwd(Monitor *mon, const QDict *qdict, |
| 649 |
QObject **ret_data) |
| 650 |
{
|
| 651 |
BlockDriverState *bs; |
| 652 |
int err;
|
| 653 |
|
| 654 |
bs = bdrv_find(qdict_get_str(qdict, "device"));
|
| 655 |
if (!bs) {
|
| 656 |
qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
|
| 657 |
return -1; |
| 658 |
} |
| 659 |
|
| 660 |
err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
|
| 661 |
if (err == -EINVAL) {
|
| 662 |
qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
| 663 |
return -1; |
| 664 |
} else if (err < 0) { |
| 665 |
qerror_report(QERR_INVALID_PASSWORD); |
| 666 |
return -1; |
| 667 |
} |
| 668 |
|
| 669 |
return 0; |
| 670 |
} |
| 671 |
|
| 672 |
int do_change_block(Monitor *mon, const char *device, |
| 673 |
const char *filename, const char *fmt) |
| 674 |
{
|
| 675 |
BlockDriverState *bs; |
| 676 |
BlockDriver *drv = NULL;
|
| 677 |
int bdrv_flags;
|
| 678 |
|
| 679 |
bs = bdrv_find(device); |
| 680 |
if (!bs) {
|
| 681 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 682 |
return -1; |
| 683 |
} |
| 684 |
if (fmt) {
|
| 685 |
drv = bdrv_find_whitelisted_format(fmt); |
| 686 |
if (!drv) {
|
| 687 |
qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt); |
| 688 |
return -1; |
| 689 |
} |
| 690 |
} |
| 691 |
if (eject_device(mon, bs, 0) < 0) { |
| 692 |
return -1; |
| 693 |
} |
| 694 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
| 695 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
| 696 |
if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { |
| 697 |
qerror_report(QERR_OPEN_FILE_FAILED, filename); |
| 698 |
return -1; |
| 699 |
} |
| 700 |
return monitor_read_bdrv_key_start(mon, bs, NULL, NULL); |
| 701 |
} |
| 702 |
|
| 703 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 704 |
{
|
| 705 |
const char *id = qdict_get_str(qdict, "id"); |
| 706 |
BlockDriverState *bs; |
| 707 |
BlockDriverState **ptr; |
| 708 |
Property *prop; |
| 709 |
|
| 710 |
bs = bdrv_find(id); |
| 711 |
if (!bs) {
|
| 712 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
| 713 |
return -1; |
| 714 |
} |
| 715 |
|
| 716 |
/* quiesce block driver; prevent further io */
|
| 717 |
qemu_aio_flush(); |
| 718 |
bdrv_flush(bs); |
| 719 |
bdrv_close(bs); |
| 720 |
|
| 721 |
/* clean up guest state from pointing to host resource by
|
| 722 |
* finding and removing DeviceState "drive" property */
|
| 723 |
if (bs->peer) {
|
| 724 |
for (prop = bs->peer->info->props; prop && prop->name; prop++) {
|
| 725 |
if (prop->info->type == PROP_TYPE_DRIVE) {
|
| 726 |
ptr = qdev_get_prop_ptr(bs->peer, prop); |
| 727 |
if (*ptr == bs) {
|
| 728 |
bdrv_detach(bs, bs->peer); |
| 729 |
*ptr = NULL;
|
| 730 |
break;
|
| 731 |
} |
| 732 |
} |
| 733 |
} |
| 734 |
} |
| 735 |
|
| 736 |
/* clean up host side */
|
| 737 |
drive_uninit(drive_get_by_blockdev(bs)); |
| 738 |
|
| 739 |
return 0; |
| 740 |
} |
| 741 |
|
| 742 |
/*
|
| 743 |
* XXX: replace the QERR_UNDEFINED_ERROR errors with real values once the
|
| 744 |
* existing QERR_ macro mess is cleaned up. A good example for better
|
| 745 |
* error reports can be found in the qemu-img resize code.
|
| 746 |
*/
|
| 747 |
int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data) |
| 748 |
{
|
| 749 |
const char *device = qdict_get_str(qdict, "device"); |
| 750 |
int64_t size = qdict_get_int(qdict, "size");
|
| 751 |
BlockDriverState *bs; |
| 752 |
|
| 753 |
bs = bdrv_find(device); |
| 754 |
if (!bs) {
|
| 755 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
| 756 |
return -1; |
| 757 |
} |
| 758 |
|
| 759 |
if (size < 0) { |
| 760 |
qerror_report(QERR_UNDEFINED_ERROR); |
| 761 |
return -1; |
| 762 |
} |
| 763 |
|
| 764 |
if (bdrv_truncate(bs, size)) {
|
| 765 |
qerror_report(QERR_UNDEFINED_ERROR); |
| 766 |
return -1; |
| 767 |
} |
| 768 |
|
| 769 |
return 0; |
| 770 |
} |