2010-06-02 20:48:27 +04:00
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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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2010-11-12 20:07:13 +03:00
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#include "hw/qdev.h"
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#include "block_int.h"
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2010-06-02 20:48:27 +04:00
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2010-06-02 20:55:22 +04:00
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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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2010-06-02 20:48:27 +04:00
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2011-01-28 13:21:39 +03:00
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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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static const int if_max_devs[IF_COUNT] = {
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2011-01-28 13:21:40 +03:00
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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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2011-01-28 13:21:39 +03:00
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};
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2010-06-25 10:09:10 +04:00
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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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2010-12-08 19:05:00 +03:00
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if (dinfo) {
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dinfo->auto_del = 1;
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}
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2010-06-25 10:09:10 +04:00
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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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2010-12-08 19:05:00 +03:00
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if (dinfo && dinfo->auto_del) {
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2010-06-25 10:09:10 +04:00
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drive_uninit(dinfo);
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}
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}
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2011-01-28 13:21:43 +03:00
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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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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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2011-01-28 13:21:41 +03:00
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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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QemuOpts *drive_add(BlockInterfaceType type, int index, const char *file,
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2011-01-31 13:50:09 +03:00
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const char *optstr)
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2010-06-02 20:48:27 +04:00
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{
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QemuOpts *opts;
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2011-01-28 13:21:41 +03:00
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char buf[32];
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2010-06-02 20:48:27 +04:00
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2011-01-28 13:21:41 +03:00
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opts = drive_def(optstr);
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2010-06-02 20:48:27 +04:00
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if (!opts) {
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return NULL;
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}
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2011-01-28 13:21:41 +03:00
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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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2010-06-02 20:48:27 +04:00
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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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2011-01-28 13:21:44 +03:00
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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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2010-06-02 20:48:27 +04:00
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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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2011-01-28 13:21:37 +03:00
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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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return drive_get(type, 0, next_block_unit[type]++);
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}
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2010-06-24 19:25:32 +04:00
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DriveInfo *drive_get_by_blockdev(BlockDriverState *bs)
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2010-06-02 20:48:27 +04:00
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{
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DriveInfo *dinfo;
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QTAILQ_FOREACH(dinfo, &drives, next) {
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2010-06-24 19:25:32 +04:00
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if (dinfo->bdrv == bs) {
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return dinfo;
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}
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2010-06-02 20:48:27 +04:00
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}
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2010-06-24 19:25:32 +04:00
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return NULL;
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_printf(" %s", name);
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_report("'%s' invalid %s error action",
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buf, is_read ? "read" : "write");
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2010-06-02 20:48:27 +04:00
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return -1;
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}
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}
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2011-01-28 13:21:46 +03:00
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DriveInfo *drive_init(QemuOpts *opts, int default_to_scsi)
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2010-06-02 20:48:27 +04:00
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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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translation = BIOS_ATA_TRANSLATION_AUTO;
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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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/* 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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2011-01-28 13:21:39 +03:00
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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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2011-01-17 21:31:27 +03:00
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error_report("unsupported bus type '%s'", buf);
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2010-06-02 20:48:27 +04:00
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return NULL;
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}
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}
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2011-01-28 13:21:39 +03:00
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max_devs = if_max_devs[type];
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2010-06-02 20:48:27 +04:00
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if (cyls || heads || secs) {
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if (cyls < 1 || (type == IF_IDE && cyls > 16383)) {
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2011-01-17 21:31:27 +03:00
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error_report("invalid physical cyls number");
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_report("invalid physical heads number");
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_report("invalid physical secs number");
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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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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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_report("'%s' invalid translation type", buf);
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_report("'%s' invalid physical CHS format", buf);
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_report("'%s' invalid media", buf);
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2010-06-02 20:48:27 +04:00
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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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2011-01-17 21:31:27 +03:00
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error_report("invalid cache option");
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2010-06-02 20:48:27 +04:00
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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;
|
|
|
|
} else if (!strcmp(buf, "threads")) {
|
|
|
|
/* this is the default */
|
|
|
|
} else {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("invalid aio option");
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
if ((buf = qemu_opt_get(opts, "format")) != NULL) {
|
|
|
|
if (strcmp(buf, "?") == 0) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_printf("Supported formats:");
|
|
|
|
bdrv_iterate_format(bdrv_format_print, NULL);
|
|
|
|
error_printf("\n");
|
|
|
|
return NULL;
|
2010-06-02 20:48:27 +04:00
|
|
|
}
|
|
|
|
drv = bdrv_find_whitelisted_format(buf);
|
|
|
|
if (!drv) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("'%s' invalid format", buf);
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
on_write_error = BLOCK_ERR_STOP_ENOSPC;
|
|
|
|
if ((buf = qemu_opt_get(opts, "werror")) != NULL) {
|
|
|
|
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("werror is not supported by this bus type");
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
on_write_error = parse_block_error_action(buf, 0);
|
|
|
|
if (on_write_error < 0) {
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
on_read_error = BLOCK_ERR_REPORT;
|
|
|
|
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) {
|
2010-10-25 16:52:21 +04:00
|
|
|
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("rerror is not supported by this bus type");
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
on_read_error = parse_block_error_action(buf, 1);
|
|
|
|
if (on_read_error < 0) {
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) {
|
|
|
|
if (type != IF_VIRTIO) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("addr is not supported by this bus type");
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* compute bus and unit according index */
|
|
|
|
|
|
|
|
if (index != -1) {
|
|
|
|
if (bus_id != 0 || unit_id != -1) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("index cannot be used with bus and unit");
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
2011-01-28 13:21:43 +03:00
|
|
|
bus_id = drive_index_to_bus_id(type, index);
|
|
|
|
unit_id = drive_index_to_unit_id(type, index);
|
2010-06-02 20:48:27 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* if user doesn't specify a unit_id,
|
|
|
|
* try to find the first free
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (unit_id == -1) {
|
|
|
|
unit_id = 0;
|
|
|
|
while (drive_get(type, bus_id, unit_id) != NULL) {
|
|
|
|
unit_id++;
|
|
|
|
if (max_devs && unit_id >= max_devs) {
|
|
|
|
unit_id -= max_devs;
|
|
|
|
bus_id++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* check unit id */
|
|
|
|
|
|
|
|
if (max_devs && unit_id >= max_devs) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("unit %d too big (max is %d)",
|
|
|
|
unit_id, max_devs - 1);
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
blockdev: Reject multiple definitions for the same drive
We silently ignore multiple definitions for the same drive:
$ qemu-system-x86_64 -nodefaults -vnc :1 -S -monitor stdio -drive if=ide,index=1,file=tmp.qcow2 -drive if=ide,index=1,file=nonexistant
QEMU 0.13.50 monitor - type 'help' for more information
(qemu) info block
ide0-hd1: type=hd removable=0 file=tmp.qcow2 backing_file=tmp.img ro=0 drv=qcow2 encrypted=0
With if=none, this can become quite confusing:
$ qemu-system-x86_64 -nodefaults -vnc :1 -S -monitor stdio -drive if=none,index=1,file=tmp.qcow2,id=eins -drive if=none,index=1,file=nonexistant,id=zwei -device ide-drive,drive=eins -device ide-drive,drive=zwei
qemu-system-x86_64: -device ide-drive,drive=zwei: Property 'ide-drive.drive' can't find value 'zwei'
The second -device fails, because it refers to drive zwei, which got
silently ignored.
Make multiple drive definitions fail cleanly.
Unfortunately, there's code that relies on multiple drive definitions
being silently ignored: main() merrily adds default drives even when
the user already defined these drives. Fix that up.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-01-28 13:21:45 +03:00
|
|
|
* catch multiple definitions
|
2010-06-02 20:48:27 +04:00
|
|
|
*/
|
|
|
|
|
|
|
|
if (drive_get(type, bus_id, unit_id) != NULL) {
|
blockdev: Reject multiple definitions for the same drive
We silently ignore multiple definitions for the same drive:
$ qemu-system-x86_64 -nodefaults -vnc :1 -S -monitor stdio -drive if=ide,index=1,file=tmp.qcow2 -drive if=ide,index=1,file=nonexistant
QEMU 0.13.50 monitor - type 'help' for more information
(qemu) info block
ide0-hd1: type=hd removable=0 file=tmp.qcow2 backing_file=tmp.img ro=0 drv=qcow2 encrypted=0
With if=none, this can become quite confusing:
$ qemu-system-x86_64 -nodefaults -vnc :1 -S -monitor stdio -drive if=none,index=1,file=tmp.qcow2,id=eins -drive if=none,index=1,file=nonexistant,id=zwei -device ide-drive,drive=eins -device ide-drive,drive=zwei
qemu-system-x86_64: -device ide-drive,drive=zwei: Property 'ide-drive.drive' can't find value 'zwei'
The second -device fails, because it refers to drive zwei, which got
silently ignored.
Make multiple drive definitions fail cleanly.
Unfortunately, there's code that relies on multiple drive definitions
being silently ignored: main() merrily adds default drives even when
the user already defined these drives. Fix that up.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2011-01-28 13:21:45 +03:00
|
|
|
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
|
|
|
bus_id, unit_id, index);
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* init */
|
|
|
|
|
|
|
|
dinfo = qemu_mallocz(sizeof(*dinfo));
|
|
|
|
if ((buf = qemu_opts_id(opts)) != NULL) {
|
|
|
|
dinfo->id = qemu_strdup(buf);
|
|
|
|
} else {
|
|
|
|
/* no id supplied -> create one */
|
|
|
|
dinfo->id = qemu_mallocz(32);
|
|
|
|
if (type == IF_IDE || type == IF_SCSI)
|
|
|
|
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd";
|
|
|
|
if (max_devs)
|
|
|
|
snprintf(dinfo->id, 32, "%s%i%s%i",
|
|
|
|
devname, bus_id, mediastr, unit_id);
|
|
|
|
else
|
|
|
|
snprintf(dinfo->id, 32, "%s%s%i",
|
|
|
|
devname, mediastr, unit_id);
|
|
|
|
}
|
|
|
|
dinfo->bdrv = bdrv_new(dinfo->id);
|
|
|
|
dinfo->devaddr = devaddr;
|
|
|
|
dinfo->type = type;
|
|
|
|
dinfo->bus = bus_id;
|
|
|
|
dinfo->unit = unit_id;
|
|
|
|
dinfo->opts = opts;
|
|
|
|
if (serial)
|
2010-06-03 00:46:31 +04:00
|
|
|
strncpy(dinfo->serial, serial, sizeof(dinfo->serial) - 1);
|
2010-06-02 20:48:27 +04:00
|
|
|
QTAILQ_INSERT_TAIL(&drives, dinfo, next);
|
|
|
|
|
2010-06-02 20:55:17 +04:00
|
|
|
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error);
|
|
|
|
|
2010-06-02 20:48:27 +04:00
|
|
|
switch(type) {
|
|
|
|
case IF_IDE:
|
|
|
|
case IF_SCSI:
|
|
|
|
case IF_XEN:
|
|
|
|
case IF_NONE:
|
|
|
|
switch(media) {
|
|
|
|
case MEDIA_DISK:
|
|
|
|
if (cyls != 0) {
|
|
|
|
bdrv_set_geometry_hint(dinfo->bdrv, cyls, heads, secs);
|
|
|
|
bdrv_set_translation_hint(dinfo->bdrv, translation);
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case MEDIA_CDROM:
|
|
|
|
bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_CDROM);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case IF_SD:
|
|
|
|
/* FIXME: This isn't really a floppy, but it's a reasonable
|
|
|
|
approximation. */
|
|
|
|
case IF_FLOPPY:
|
|
|
|
bdrv_set_type_hint(dinfo->bdrv, BDRV_TYPE_FLOPPY);
|
|
|
|
break;
|
|
|
|
case IF_PFLASH:
|
|
|
|
case IF_MTD:
|
|
|
|
break;
|
|
|
|
case IF_VIRTIO:
|
|
|
|
/* add virtio block device */
|
2010-08-20 15:52:01 +04:00
|
|
|
opts = qemu_opts_create(qemu_find_opts("device"), NULL, 0);
|
2010-06-02 20:48:27 +04:00
|
|
|
qemu_opt_set(opts, "driver", "virtio-blk-pci");
|
|
|
|
qemu_opt_set(opts, "drive", dinfo->id);
|
|
|
|
if (devaddr)
|
|
|
|
qemu_opt_set(opts, "addr", devaddr);
|
|
|
|
break;
|
2011-01-28 13:21:41 +03:00
|
|
|
default:
|
2010-06-02 20:48:27 +04:00
|
|
|
abort();
|
|
|
|
}
|
2010-05-11 17:36:46 +04:00
|
|
|
if (!file || !*file) {
|
2011-01-28 13:21:46 +03:00
|
|
|
return dinfo;
|
2010-06-02 20:48:27 +04:00
|
|
|
}
|
|
|
|
if (snapshot) {
|
|
|
|
/* always use cache=unsafe with snapshot */
|
|
|
|
bdrv_flags &= ~BDRV_O_CACHE_MASK;
|
|
|
|
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (media == MEDIA_CDROM) {
|
|
|
|
/* CDROM is fine for any interface, don't check. */
|
|
|
|
ro = 1;
|
|
|
|
} else if (ro == 1) {
|
|
|
|
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY && type != IF_NONE) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("readonly not supported by this bus type");
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
|
|
|
|
|
|
|
ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv);
|
|
|
|
if (ret < 0) {
|
2011-01-17 21:31:27 +03:00
|
|
|
error_report("could not open disk image %s: %s",
|
|
|
|
file, strerror(-ret));
|
2010-06-02 20:48:27 +04:00
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (bdrv_key_required(dinfo->bdrv))
|
|
|
|
autostart = 0;
|
|
|
|
return dinfo;
|
|
|
|
}
|
|
|
|
|
|
|
|
void do_commit(Monitor *mon, const QDict *qdict)
|
|
|
|
{
|
|
|
|
const char *device = qdict_get_str(qdict, "device");
|
2010-06-02 20:55:18 +04:00
|
|
|
BlockDriverState *bs;
|
2010-06-02 20:48:27 +04:00
|
|
|
|
2010-06-02 20:55:18 +04:00
|
|
|
if (!strcmp(device, "all")) {
|
|
|
|
bdrv_commit_all();
|
|
|
|
} else {
|
|
|
|
bs = bdrv_find(device);
|
2010-06-02 20:55:19 +04:00
|
|
|
if (!bs) {
|
|
|
|
qerror_report(QERR_DEVICE_NOT_FOUND, device);
|
|
|
|
return;
|
2010-06-02 20:55:18 +04:00
|
|
|
}
|
2010-06-02 20:55:19 +04:00
|
|
|
bdrv_commit(bs);
|
2010-06-02 20:48:27 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-12-16 15:52:16 +03:00
|
|
|
int do_snapshot_blkdev(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
|
|
|
{
|
|
|
|
const char *device = qdict_get_str(qdict, "device");
|
|
|
|
const char *filename = qdict_get_try_str(qdict, "snapshot_file");
|
|
|
|
const char *format = qdict_get_try_str(qdict, "format");
|
|
|
|
BlockDriverState *bs;
|
|
|
|
BlockDriver *drv, *proto_drv;
|
|
|
|
int ret = 0;
|
|
|
|
int flags;
|
|
|
|
|
2011-01-06 19:02:23 +03:00
|
|
|
if (!filename) {
|
|
|
|
qerror_report(QERR_MISSING_PARAMETER, "snapshot_file");
|
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
2010-12-16 15:52:16 +03:00
|
|
|
bs = bdrv_find(device);
|
|
|
|
if (!bs) {
|
|
|
|
qerror_report(QERR_DEVICE_NOT_FOUND, device);
|
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!format) {
|
|
|
|
format = "qcow2";
|
|
|
|
}
|
|
|
|
|
|
|
|
drv = bdrv_find_format(format);
|
|
|
|
if (!drv) {
|
|
|
|
qerror_report(QERR_INVALID_BLOCK_FORMAT, format);
|
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
proto_drv = bdrv_find_protocol(filename);
|
|
|
|
if (!proto_drv) {
|
|
|
|
qerror_report(QERR_INVALID_BLOCK_FORMAT, format);
|
|
|
|
ret = -1;
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = bdrv_img_create(filename, format, bs->filename,
|
|
|
|
bs->drv->format_name, NULL, -1, bs->open_flags);
|
|
|
|
if (ret) {
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
qemu_aio_flush();
|
|
|
|
bdrv_flush(bs);
|
|
|
|
|
|
|
|
flags = bs->open_flags;
|
|
|
|
bdrv_close(bs);
|
|
|
|
ret = bdrv_open(bs, filename, flags, drv);
|
|
|
|
/*
|
|
|
|
* If reopening the image file we just created fails, we really
|
|
|
|
* are in trouble :(
|
|
|
|
*/
|
|
|
|
if (ret != 0) {
|
|
|
|
abort();
|
|
|
|
}
|
|
|
|
out:
|
|
|
|
if (ret) {
|
|
|
|
ret = -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-06-02 20:48:27 +04:00
|
|
|
static int eject_device(Monitor *mon, BlockDriverState *bs, int force)
|
|
|
|
{
|
2010-06-02 02:12:19 +04:00
|
|
|
if (!force) {
|
|
|
|
if (!bdrv_is_removable(bs)) {
|
|
|
|
qerror_report(QERR_DEVICE_NOT_REMOVABLE,
|
|
|
|
bdrv_get_device_name(bs));
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
if (bdrv_is_locked(bs)) {
|
|
|
|
qerror_report(QERR_DEVICE_LOCKED, bdrv_get_device_name(bs));
|
|
|
|
return -1;
|
2010-06-02 20:48:27 +04:00
|
|
|
}
|
|
|
|
}
|
2010-06-02 02:12:19 +04:00
|
|
|
bdrv_close(bs);
|
2010-06-02 20:48:27 +04:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
int do_eject(Monitor *mon, const QDict *qdict, QObject **ret_data)
|
|
|
|
{
|
|
|
|
BlockDriverState *bs;
|
Monitor: handle optional '-' arg as a bool
Historically, user monitor arguments beginning with '-' (eg. '-f')
were passed as integers down to handlers.
I've maintained this behavior in the new monitor because we didn't
have a boolean type at the very beginning of QMP. Today we have it
and this behavior is causing trouble to QMP's argument checker.
This commit fixes the problem by doing the following changes:
1. User Monitor
Before: the optional arg was represented as a QInt, we'd pass 1
down to handlers if the user specified the argument or
0 otherwise
This commit: the optional arg is represented as a QBool, we pass
true down to handlers if the user specified the
argument, otherwise _nothing_ is passed
2. QMP
Before: the client was required to pass the arg as QBool, but we'd
convert it to QInt internally. If the argument wasn't passed,
we'd pass 0 down
This commit: still require a QBool, but doesn't do any conversion and
doesn't pass any default value
3. Convert existing handlers (do_eject()/do_migrate()) to the new way
Before: Both handlers would expect a QInt value, either 0 or 1
This commit: Change the handlers to accept a QBool, they handle the
following cases:
A) true is passed: the option is enabled
B) false is passed: the option is disabled
C) nothing is passed: option not specified, use
default behavior
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2010-05-28 22:25:24 +04:00
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int force = qdict_get_try_bool(qdict, "force", 0);
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2010-06-02 20:48:27 +04:00
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const char *filename = qdict_get_str(qdict, "device");
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bs = bdrv_find(filename);
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if (!bs) {
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qerror_report(QERR_DEVICE_NOT_FOUND, filename);
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return -1;
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}
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return eject_device(mon, bs, force);
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}
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int do_block_set_passwd(Monitor *mon, const QDict *qdict,
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QObject **ret_data)
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{
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BlockDriverState *bs;
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int err;
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bs = bdrv_find(qdict_get_str(qdict, "device"));
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if (!bs) {
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qerror_report(QERR_DEVICE_NOT_FOUND, qdict_get_str(qdict, "device"));
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return -1;
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}
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err = bdrv_set_key(bs, qdict_get_str(qdict, "password"));
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if (err == -EINVAL) {
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qerror_report(QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs));
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return -1;
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} else if (err < 0) {
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qerror_report(QERR_INVALID_PASSWORD);
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return -1;
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}
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return 0;
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}
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int do_change_block(Monitor *mon, const char *device,
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const char *filename, const char *fmt)
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{
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BlockDriverState *bs;
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BlockDriver *drv = NULL;
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int bdrv_flags;
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bs = bdrv_find(device);
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if (!bs) {
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qerror_report(QERR_DEVICE_NOT_FOUND, device);
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return -1;
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}
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if (fmt) {
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drv = bdrv_find_whitelisted_format(fmt);
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if (!drv) {
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qerror_report(QERR_INVALID_BLOCK_FORMAT, fmt);
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return -1;
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}
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}
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if (eject_device(mon, bs, 0) < 0) {
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return -1;
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}
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2010-06-25 17:26:48 +04:00
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bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
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2010-07-26 00:49:34 +04:00
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bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
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2010-06-02 20:48:27 +04:00
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if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) {
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qerror_report(QERR_OPEN_FILE_FAILED, filename);
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return -1;
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}
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return monitor_read_bdrv_key_start(mon, bs, NULL, NULL);
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}
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2010-11-12 20:07:13 +03:00
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int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data)
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{
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const char *id = qdict_get_str(qdict, "id");
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BlockDriverState *bs;
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BlockDriverState **ptr;
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Property *prop;
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bs = bdrv_find(id);
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if (!bs) {
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qerror_report(QERR_DEVICE_NOT_FOUND, id);
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return -1;
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}
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/* quiesce block driver; prevent further io */
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qemu_aio_flush();
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bdrv_flush(bs);
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bdrv_close(bs);
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/* clean up guest state from pointing to host resource by
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* finding and removing DeviceState "drive" property */
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2011-01-17 21:31:29 +03:00
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if (bs->peer) {
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for (prop = bs->peer->info->props; prop && prop->name; prop++) {
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if (prop->info->type == PROP_TYPE_DRIVE) {
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ptr = qdev_get_prop_ptr(bs->peer, prop);
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if (*ptr == bs) {
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bdrv_detach(bs, bs->peer);
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*ptr = NULL;
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break;
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}
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2010-11-12 20:07:13 +03:00
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}
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}
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}
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/* clean up host side */
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drive_uninit(drive_get_by_blockdev(bs));
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return 0;
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}
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2011-01-24 15:32:33 +03:00
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/*
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* XXX: replace the QERR_UNDEFINED_ERROR errors with real values once the
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* existing QERR_ macro mess is cleaned up. A good example for better
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* error reports can be found in the qemu-img resize code.
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*/
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int do_block_resize(Monitor *mon, const QDict *qdict, QObject **ret_data)
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{
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const char *device = qdict_get_str(qdict, "device");
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int64_t size = qdict_get_int(qdict, "size");
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BlockDriverState *bs;
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bs = bdrv_find(device);
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if (!bs) {
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qerror_report(QERR_DEVICE_NOT_FOUND, device);
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return -1;
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}
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if (size < 0) {
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qerror_report(QERR_UNDEFINED_ERROR);
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return -1;
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}
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if (bdrv_truncate(bs, size)) {
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qerror_report(QERR_UNDEFINED_ERROR);
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return -1;
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}
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return 0;
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}
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