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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 "sysemu/blockdev.h" |
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#include "hw/block-common.h" |
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#include "block/blockjob.h" |
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#include "monitor/monitor.h" |
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#include "qapi/qmp/qerror.h" |
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#include "qemu/option.h" |
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#include "qemu/config-file.h" |
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#include "qapi/qmp/types.h" |
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#include "sysemu/sysemu.h" |
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#include "block/block_int.h" |
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#include "qmp-commands.h" |
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#include "trace.h" |
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#include "sysemu/arch_init.h" |
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|
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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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extern QemuOptsList qemu_common_drive_opts;
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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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/*
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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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* 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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if (bs->job) {
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block_job_cancel(bs->job); |
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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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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 && dinfo->auto_del) {
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drive_put_ref(dinfo); |
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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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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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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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const char *optstr) |
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{ |
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QemuOpts *opts; |
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char buf[32]; |
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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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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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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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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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/* 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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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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error_printf(" %s", name);
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} |
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static 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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g_free(dinfo->id); |
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QTAILQ_REMOVE(&drives, dinfo, next); |
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g_free(dinfo->serial); |
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g_free(dinfo); |
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} |
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void drive_put_ref(DriveInfo *dinfo)
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{ |
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assert(dinfo->refcount); |
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if (--dinfo->refcount == 0) { |
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drive_uninit(dinfo); |
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} |
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} |
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void drive_get_ref(DriveInfo *dinfo)
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{ |
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dinfo->refcount++; |
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} |
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typedef struct { |
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QEMUBH *bh; |
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DriveInfo *dinfo; |
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} DrivePutRefBH; |
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static void drive_put_ref_bh(void *opaque) |
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{ |
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DrivePutRefBH *s = opaque; |
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drive_put_ref(s->dinfo); |
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qemu_bh_delete(s->bh); |
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g_free(s); |
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} |
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/*
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* Release a drive reference in a BH
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*
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* It is not possible to use drive_put_ref() from a callback function when the
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* callers still need the drive. In such cases we schedule a BH to release the
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* reference.
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*/
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static void drive_put_ref_bh_schedule(DriveInfo *dinfo) |
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{ |
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DrivePutRefBH *s; |
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s = g_new(DrivePutRefBH, 1);
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s->bh = qemu_bh_new(drive_put_ref_bh, s); |
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s->dinfo = dinfo; |
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qemu_bh_schedule(s->bh); |
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} |
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static int parse_block_error_action(const char *buf, bool is_read) |
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{ |
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if (!strcmp(buf, "ignore")) { |
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return BLOCKDEV_ON_ERROR_IGNORE;
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} else if (!is_read && !strcmp(buf, "enospc")) { |
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return BLOCKDEV_ON_ERROR_ENOSPC;
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} else if (!strcmp(buf, "stop")) { |
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return BLOCKDEV_ON_ERROR_STOP;
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} else if (!strcmp(buf, "report")) { |
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return BLOCKDEV_ON_ERROR_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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} |
259 |
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static bool do_check_io_limits(BlockIOLimit *io_limits, Error **errp) |
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{ |
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bool bps_flag;
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bool iops_flag;
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assert(io_limits); |
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bps_flag = (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] != 0)
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&& ((io_limits->bps[BLOCK_IO_LIMIT_READ] != 0)
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|| (io_limits->bps[BLOCK_IO_LIMIT_WRITE] != 0));
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iops_flag = (io_limits->iops[BLOCK_IO_LIMIT_TOTAL] != 0)
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&& ((io_limits->iops[BLOCK_IO_LIMIT_READ] != 0)
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|| (io_limits->iops[BLOCK_IO_LIMIT_WRITE] != 0));
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if (bps_flag || iops_flag) {
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error_setg(errp, "bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
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"cannot be used at the same time");
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return false; |
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} |
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if (io_limits->bps[BLOCK_IO_LIMIT_TOTAL] < 0 || |
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io_limits->bps[BLOCK_IO_LIMIT_WRITE] < 0 ||
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io_limits->bps[BLOCK_IO_LIMIT_READ] < 0 ||
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io_limits->iops[BLOCK_IO_LIMIT_TOTAL] < 0 ||
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io_limits->iops[BLOCK_IO_LIMIT_WRITE] < 0 ||
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io_limits->iops[BLOCK_IO_LIMIT_READ] < 0) {
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error_setg(errp, "bps and iops values must be 0 or greater");
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return false; |
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} |
288 |
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return true; |
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} |
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DriveInfo *drive_init(QemuOpts *all_opts, BlockInterfaceType block_default_type) |
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{ |
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const char *buf; |
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const char *file = NULL; |
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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; |
306 |
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; |
310 |
BlockIOLimit io_limits; |
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int snapshot = 0; |
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bool copy_on_read;
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int ret;
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Error *error = NULL;
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QemuOpts *opts; |
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QDict *bs_opts; |
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const char *id; |
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translation = BIOS_ATA_TRANSLATION_AUTO; |
320 |
media = MEDIA_DISK; |
321 |
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/* Check common options by copying from all_opts to opts, all other options
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* are stored in bs_opts. */
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id = qemu_opts_id(all_opts); |
325 |
opts = qemu_opts_create(&qemu_common_drive_opts, id, 1, &error);
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if (error_is_set(&error)) {
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qerror_report_err(error); |
328 |
error_free(error); |
329 |
return NULL; |
330 |
} |
331 |
|
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bs_opts = qdict_new(); |
333 |
qemu_opts_to_qdict(all_opts, bs_opts); |
334 |
qemu_opts_absorb_qdict(opts, bs_opts, &error); |
335 |
if (error_is_set(&error)) {
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qerror_report_err(error); |
337 |
error_free(error); |
338 |
return NULL; |
339 |
} |
340 |
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if (id) {
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qdict_del(bs_opts, "id");
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} |
344 |
|
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/* extract parameters */
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bus_id = qemu_opt_get_number(opts, "bus", 0); |
347 |
unit_id = qemu_opt_get_number(opts, "unit", -1); |
348 |
index = qemu_opt_get_number(opts, "index", -1); |
349 |
|
350 |
cyls = qemu_opt_get_number(opts, "cyls", 0); |
351 |
heads = qemu_opt_get_number(opts, "heads", 0); |
352 |
secs = qemu_opt_get_number(opts, "secs", 0); |
353 |
|
354 |
snapshot = qemu_opt_get_bool(opts, "snapshot", 0); |
355 |
ro = qemu_opt_get_bool(opts, "readonly", 0); |
356 |
copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
357 |
|
358 |
file = qemu_opt_get(opts, "file");
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359 |
serial = qemu_opt_get(opts, "serial");
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360 |
|
361 |
if ((buf = qemu_opt_get(opts, "if")) != NULL) { |
362 |
for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
363 |
; |
364 |
if (type == IF_COUNT) {
|
365 |
error_report("unsupported bus type '%s'", buf);
|
366 |
return NULL; |
367 |
} |
368 |
} else {
|
369 |
type = block_default_type; |
370 |
} |
371 |
|
372 |
max_devs = if_max_devs[type]; |
373 |
|
374 |
if (cyls || heads || secs) {
|
375 |
if (cyls < 1) { |
376 |
error_report("invalid physical cyls number");
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377 |
return NULL; |
378 |
} |
379 |
if (heads < 1) { |
380 |
error_report("invalid physical heads number");
|
381 |
return NULL; |
382 |
} |
383 |
if (secs < 1) { |
384 |
error_report("invalid physical secs number");
|
385 |
return NULL; |
386 |
} |
387 |
} |
388 |
|
389 |
if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
390 |
if (!cyls) {
|
391 |
error_report("'%s' trans must be used with cyls, heads and secs",
|
392 |
buf); |
393 |
return NULL; |
394 |
} |
395 |
if (!strcmp(buf, "none")) |
396 |
translation = BIOS_ATA_TRANSLATION_NONE; |
397 |
else if (!strcmp(buf, "lba")) |
398 |
translation = BIOS_ATA_TRANSLATION_LBA; |
399 |
else if (!strcmp(buf, "auto")) |
400 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
401 |
else {
|
402 |
error_report("'%s' invalid translation type", buf);
|
403 |
return NULL; |
404 |
} |
405 |
} |
406 |
|
407 |
if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
408 |
if (!strcmp(buf, "disk")) { |
409 |
media = MEDIA_DISK; |
410 |
} else if (!strcmp(buf, "cdrom")) { |
411 |
if (cyls || secs || heads) {
|
412 |
error_report("CHS can't be set with media=%s", buf);
|
413 |
return NULL; |
414 |
} |
415 |
media = MEDIA_CDROM; |
416 |
} else {
|
417 |
error_report("'%s' invalid media", buf);
|
418 |
return NULL; |
419 |
} |
420 |
} |
421 |
|
422 |
if ((buf = qemu_opt_get(opts, "discard")) != NULL) { |
423 |
if (bdrv_parse_discard_flags(buf, &bdrv_flags) != 0) { |
424 |
error_report("invalid discard option");
|
425 |
return NULL; |
426 |
} |
427 |
} |
428 |
|
429 |
bdrv_flags |= BDRV_O_CACHE_WB; |
430 |
if ((buf = qemu_opt_get(opts, "cache")) != NULL) { |
431 |
if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { |
432 |
error_report("invalid cache option");
|
433 |
return NULL; |
434 |
} |
435 |
} |
436 |
|
437 |
#ifdef CONFIG_LINUX_AIO
|
438 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
439 |
if (!strcmp(buf, "native")) { |
440 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
441 |
} else if (!strcmp(buf, "threads")) { |
442 |
/* this is the default */
|
443 |
} else {
|
444 |
error_report("invalid aio option");
|
445 |
return NULL; |
446 |
} |
447 |
} |
448 |
#endif
|
449 |
|
450 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
451 |
if (is_help_option(buf)) {
|
452 |
error_printf("Supported formats:");
|
453 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
454 |
error_printf("\n");
|
455 |
return NULL; |
456 |
} |
457 |
drv = bdrv_find_whitelisted_format(buf); |
458 |
if (!drv) {
|
459 |
error_report("'%s' invalid format", buf);
|
460 |
return NULL; |
461 |
} |
462 |
} |
463 |
|
464 |
/* disk I/O throttling */
|
465 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = |
466 |
qemu_opt_get_number(opts, "bps", 0); |
467 |
io_limits.bps[BLOCK_IO_LIMIT_READ] = |
468 |
qemu_opt_get_number(opts, "bps_rd", 0); |
469 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = |
470 |
qemu_opt_get_number(opts, "bps_wr", 0); |
471 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = |
472 |
qemu_opt_get_number(opts, "iops", 0); |
473 |
io_limits.iops[BLOCK_IO_LIMIT_READ] = |
474 |
qemu_opt_get_number(opts, "iops_rd", 0); |
475 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE] = |
476 |
qemu_opt_get_number(opts, "iops_wr", 0); |
477 |
|
478 |
if (!do_check_io_limits(&io_limits, &error)) {
|
479 |
error_report("%s", error_get_pretty(error));
|
480 |
error_free(error); |
481 |
return NULL; |
482 |
} |
483 |
|
484 |
if (qemu_opt_get(opts, "boot") != NULL) { |
485 |
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
486 |
"ignored. Future versions will reject this parameter. Please "
|
487 |
"update your scripts.\n");
|
488 |
} |
489 |
|
490 |
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
491 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
492 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
493 |
error_report("werror is not supported by this bus type");
|
494 |
return NULL; |
495 |
} |
496 |
|
497 |
on_write_error = parse_block_error_action(buf, 0);
|
498 |
if (on_write_error < 0) { |
499 |
return NULL; |
500 |
} |
501 |
} |
502 |
|
503 |
on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
504 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
505 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
506 |
error_report("rerror is not supported by this bus type");
|
507 |
return NULL; |
508 |
} |
509 |
|
510 |
on_read_error = parse_block_error_action(buf, 1);
|
511 |
if (on_read_error < 0) { |
512 |
return NULL; |
513 |
} |
514 |
} |
515 |
|
516 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
517 |
if (type != IF_VIRTIO) {
|
518 |
error_report("addr is not supported by this bus type");
|
519 |
return NULL; |
520 |
} |
521 |
} |
522 |
|
523 |
/* compute bus and unit according index */
|
524 |
|
525 |
if (index != -1) { |
526 |
if (bus_id != 0 || unit_id != -1) { |
527 |
error_report("index cannot be used with bus and unit");
|
528 |
return NULL; |
529 |
} |
530 |
bus_id = drive_index_to_bus_id(type, index); |
531 |
unit_id = drive_index_to_unit_id(type, index); |
532 |
} |
533 |
|
534 |
/* if user doesn't specify a unit_id,
|
535 |
* try to find the first free
|
536 |
*/
|
537 |
|
538 |
if (unit_id == -1) { |
539 |
unit_id = 0;
|
540 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
541 |
unit_id++; |
542 |
if (max_devs && unit_id >= max_devs) {
|
543 |
unit_id -= max_devs; |
544 |
bus_id++; |
545 |
} |
546 |
} |
547 |
} |
548 |
|
549 |
/* check unit id */
|
550 |
|
551 |
if (max_devs && unit_id >= max_devs) {
|
552 |
error_report("unit %d too big (max is %d)",
|
553 |
unit_id, max_devs - 1);
|
554 |
return NULL; |
555 |
} |
556 |
|
557 |
/*
|
558 |
* catch multiple definitions
|
559 |
*/
|
560 |
|
561 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
562 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
563 |
bus_id, unit_id, index); |
564 |
return NULL; |
565 |
} |
566 |
|
567 |
/* init */
|
568 |
|
569 |
dinfo = g_malloc0(sizeof(*dinfo));
|
570 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
571 |
dinfo->id = g_strdup(buf); |
572 |
} else {
|
573 |
/* no id supplied -> create one */
|
574 |
dinfo->id = g_malloc0(32);
|
575 |
if (type == IF_IDE || type == IF_SCSI)
|
576 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
577 |
if (max_devs)
|
578 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
579 |
if_name[type], bus_id, mediastr, unit_id); |
580 |
else
|
581 |
snprintf(dinfo->id, 32, "%s%s%i", |
582 |
if_name[type], mediastr, unit_id); |
583 |
} |
584 |
dinfo->bdrv = bdrv_new(dinfo->id); |
585 |
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
586 |
dinfo->bdrv->read_only = ro; |
587 |
dinfo->devaddr = devaddr; |
588 |
dinfo->type = type; |
589 |
dinfo->bus = bus_id; |
590 |
dinfo->unit = unit_id; |
591 |
dinfo->cyls = cyls; |
592 |
dinfo->heads = heads; |
593 |
dinfo->secs = secs; |
594 |
dinfo->trans = translation; |
595 |
dinfo->opts = all_opts; |
596 |
dinfo->refcount = 1;
|
597 |
if (serial != NULL) { |
598 |
dinfo->serial = g_strdup(serial); |
599 |
} |
600 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
601 |
|
602 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
603 |
|
604 |
/* disk I/O throttling */
|
605 |
bdrv_set_io_limits(dinfo->bdrv, &io_limits); |
606 |
|
607 |
switch(type) {
|
608 |
case IF_IDE:
|
609 |
case IF_SCSI:
|
610 |
case IF_XEN:
|
611 |
case IF_NONE:
|
612 |
dinfo->media_cd = media == MEDIA_CDROM; |
613 |
break;
|
614 |
case IF_SD:
|
615 |
case IF_FLOPPY:
|
616 |
case IF_PFLASH:
|
617 |
case IF_MTD:
|
618 |
break;
|
619 |
case IF_VIRTIO:
|
620 |
{ |
621 |
/* add virtio block device */
|
622 |
QemuOpts *devopts; |
623 |
devopts = qemu_opts_create_nofail(qemu_find_opts("device"));
|
624 |
if (arch_type == QEMU_ARCH_S390X) {
|
625 |
qemu_opt_set(devopts, "driver", "virtio-blk-s390"); |
626 |
} else {
|
627 |
qemu_opt_set(devopts, "driver", "virtio-blk-pci"); |
628 |
} |
629 |
qemu_opt_set(devopts, "drive", dinfo->id);
|
630 |
if (devaddr)
|
631 |
qemu_opt_set(devopts, "addr", devaddr);
|
632 |
break;
|
633 |
} |
634 |
default:
|
635 |
abort(); |
636 |
} |
637 |
if (!file || !*file) {
|
638 |
return dinfo;
|
639 |
} |
640 |
if (snapshot) {
|
641 |
/* always use cache=unsafe with snapshot */
|
642 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
643 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
644 |
} |
645 |
|
646 |
if (copy_on_read) {
|
647 |
bdrv_flags |= BDRV_O_COPY_ON_READ; |
648 |
} |
649 |
|
650 |
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
651 |
bdrv_flags |= BDRV_O_INCOMING; |
652 |
} |
653 |
|
654 |
if (media == MEDIA_CDROM) {
|
655 |
/* CDROM is fine for any interface, don't check. */
|
656 |
ro = 1;
|
657 |
} else if (ro == 1) { |
658 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
|
659 |
type != IF_NONE && type != IF_PFLASH) { |
660 |
error_report("readonly not supported by this bus type");
|
661 |
goto err;
|
662 |
} |
663 |
} |
664 |
|
665 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
666 |
|
667 |
if (ro && copy_on_read) {
|
668 |
error_report("warning: disabling copy_on_read on readonly drive");
|
669 |
} |
670 |
|
671 |
ret = bdrv_open(dinfo->bdrv, file, bs_opts, bdrv_flags, drv); |
672 |
bs_opts = NULL;
|
673 |
|
674 |
if (ret < 0) { |
675 |
if (ret == -EMEDIUMTYPE) {
|
676 |
error_report("could not open disk image %s: not in %s format",
|
677 |
file, drv->format_name); |
678 |
} else {
|
679 |
error_report("could not open disk image %s: %s",
|
680 |
file, strerror(-ret)); |
681 |
} |
682 |
goto err;
|
683 |
} |
684 |
|
685 |
if (bdrv_key_required(dinfo->bdrv))
|
686 |
autostart = 0;
|
687 |
|
688 |
qemu_opts_del(opts); |
689 |
|
690 |
return dinfo;
|
691 |
|
692 |
err:
|
693 |
qemu_opts_del(opts); |
694 |
QDECREF(bs_opts); |
695 |
bdrv_delete(dinfo->bdrv); |
696 |
g_free(dinfo->id); |
697 |
QTAILQ_REMOVE(&drives, dinfo, next); |
698 |
g_free(dinfo); |
699 |
return NULL; |
700 |
} |
701 |
|
702 |
void do_commit(Monitor *mon, const QDict *qdict) |
703 |
{ |
704 |
const char *device = qdict_get_str(qdict, "device"); |
705 |
BlockDriverState *bs; |
706 |
int ret;
|
707 |
|
708 |
if (!strcmp(device, "all")) { |
709 |
ret = bdrv_commit_all(); |
710 |
} else {
|
711 |
bs = bdrv_find(device); |
712 |
if (!bs) {
|
713 |
monitor_printf(mon, "Device '%s' not found\n", device);
|
714 |
return;
|
715 |
} |
716 |
ret = bdrv_commit(bs); |
717 |
} |
718 |
if (ret < 0) { |
719 |
monitor_printf(mon, "'commit' error for '%s': %s\n", device,
|
720 |
strerror(-ret)); |
721 |
} |
722 |
} |
723 |
|
724 |
static void blockdev_do_action(int kind, void *data, Error **errp) |
725 |
{ |
726 |
BlockdevAction action; |
727 |
BlockdevActionList list; |
728 |
|
729 |
action.kind = kind; |
730 |
action.data = data; |
731 |
list.value = &action; |
732 |
list.next = NULL;
|
733 |
qmp_transaction(&list, errp); |
734 |
} |
735 |
|
736 |
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
737 |
bool has_format, const char *format, |
738 |
bool has_mode, enum NewImageMode mode, |
739 |
Error **errp) |
740 |
{ |
741 |
BlockdevSnapshot snapshot = { |
742 |
.device = (char *) device,
|
743 |
.snapshot_file = (char *) snapshot_file,
|
744 |
.has_format = has_format, |
745 |
.format = (char *) format,
|
746 |
.has_mode = has_mode, |
747 |
.mode = mode, |
748 |
}; |
749 |
blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot, |
750 |
errp); |
751 |
} |
752 |
|
753 |
|
754 |
/* New and old BlockDriverState structs for group snapshots */
|
755 |
typedef struct BlkTransactionStates { |
756 |
BlockDriverState *old_bs; |
757 |
BlockDriverState *new_bs; |
758 |
QSIMPLEQ_ENTRY(BlkTransactionStates) entry; |
759 |
} BlkTransactionStates; |
760 |
|
761 |
/*
|
762 |
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
763 |
* then we do not pivot any of the devices in the group, and abandon the
|
764 |
* snapshots
|
765 |
*/
|
766 |
void qmp_transaction(BlockdevActionList *dev_list, Error **errp)
|
767 |
{ |
768 |
int ret = 0; |
769 |
BlockdevActionList *dev_entry = dev_list; |
770 |
BlkTransactionStates *states, *next; |
771 |
Error *local_err = NULL;
|
772 |
|
773 |
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states; |
774 |
QSIMPLEQ_INIT(&snap_bdrv_states); |
775 |
|
776 |
/* drain all i/o before any snapshots */
|
777 |
bdrv_drain_all(); |
778 |
|
779 |
/* We don't do anything in this loop that commits us to the snapshot */
|
780 |
while (NULL != dev_entry) { |
781 |
BlockdevAction *dev_info = NULL;
|
782 |
BlockDriver *proto_drv; |
783 |
BlockDriver *drv; |
784 |
int flags;
|
785 |
enum NewImageMode mode;
|
786 |
const char *new_image_file; |
787 |
const char *device; |
788 |
const char *format = "qcow2"; |
789 |
|
790 |
dev_info = dev_entry->value; |
791 |
dev_entry = dev_entry->next; |
792 |
|
793 |
states = g_malloc0(sizeof(BlkTransactionStates));
|
794 |
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry); |
795 |
|
796 |
switch (dev_info->kind) {
|
797 |
case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
|
798 |
device = dev_info->blockdev_snapshot_sync->device; |
799 |
if (!dev_info->blockdev_snapshot_sync->has_mode) {
|
800 |
dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
801 |
} |
802 |
new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file; |
803 |
if (dev_info->blockdev_snapshot_sync->has_format) {
|
804 |
format = dev_info->blockdev_snapshot_sync->format; |
805 |
} |
806 |
mode = dev_info->blockdev_snapshot_sync->mode; |
807 |
break;
|
808 |
default:
|
809 |
abort(); |
810 |
} |
811 |
|
812 |
drv = bdrv_find_format(format); |
813 |
if (!drv) {
|
814 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
815 |
goto delete_and_fail;
|
816 |
} |
817 |
|
818 |
states->old_bs = bdrv_find(device); |
819 |
if (!states->old_bs) {
|
820 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
821 |
goto delete_and_fail;
|
822 |
} |
823 |
|
824 |
if (!bdrv_is_inserted(states->old_bs)) {
|
825 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
826 |
goto delete_and_fail;
|
827 |
} |
828 |
|
829 |
if (bdrv_in_use(states->old_bs)) {
|
830 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
831 |
goto delete_and_fail;
|
832 |
} |
833 |
|
834 |
if (!bdrv_is_read_only(states->old_bs)) {
|
835 |
if (bdrv_flush(states->old_bs)) {
|
836 |
error_set(errp, QERR_IO_ERROR); |
837 |
goto delete_and_fail;
|
838 |
} |
839 |
} |
840 |
|
841 |
flags = states->old_bs->open_flags; |
842 |
|
843 |
proto_drv = bdrv_find_protocol(new_image_file); |
844 |
if (!proto_drv) {
|
845 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
846 |
goto delete_and_fail;
|
847 |
} |
848 |
|
849 |
/* create new image w/backing file */
|
850 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
851 |
bdrv_img_create(new_image_file, format, |
852 |
states->old_bs->filename, |
853 |
states->old_bs->drv->format_name, |
854 |
NULL, -1, flags, &local_err, false); |
855 |
if (error_is_set(&local_err)) {
|
856 |
error_propagate(errp, local_err); |
857 |
goto delete_and_fail;
|
858 |
} |
859 |
} |
860 |
|
861 |
/* We will manually add the backing_hd field to the bs later */
|
862 |
states->new_bs = bdrv_new("");
|
863 |
/* TODO Inherit bs->options or only take explicit options with an
|
864 |
* extended QMP command? */
|
865 |
ret = bdrv_open(states->new_bs, new_image_file, NULL,
|
866 |
flags | BDRV_O_NO_BACKING, drv); |
867 |
if (ret != 0) { |
868 |
error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); |
869 |
goto delete_and_fail;
|
870 |
} |
871 |
} |
872 |
|
873 |
|
874 |
/* Now we are going to do the actual pivot. Everything up to this point
|
875 |
* is reversible, but we are committed at this point */
|
876 |
QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { |
877 |
/* This removes our old bs from the bdrv_states, and adds the new bs */
|
878 |
bdrv_append(states->new_bs, states->old_bs); |
879 |
/* We don't need (or want) to use the transactional
|
880 |
* bdrv_reopen_multiple() across all the entries at once, because we
|
881 |
* don't want to abort all of them if one of them fails the reopen */
|
882 |
bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR, |
883 |
NULL);
|
884 |
} |
885 |
|
886 |
/* success */
|
887 |
goto exit;
|
888 |
|
889 |
delete_and_fail:
|
890 |
/*
|
891 |
* failure, and it is all-or-none; abandon each new bs, and keep using
|
892 |
* the original bs for all images
|
893 |
*/
|
894 |
QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { |
895 |
if (states->new_bs) {
|
896 |
bdrv_delete(states->new_bs); |
897 |
} |
898 |
} |
899 |
exit:
|
900 |
QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) { |
901 |
g_free(states); |
902 |
} |
903 |
} |
904 |
|
905 |
|
906 |
static void eject_device(BlockDriverState *bs, int force, Error **errp) |
907 |
{ |
908 |
if (bdrv_in_use(bs)) {
|
909 |
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
910 |
return;
|
911 |
} |
912 |
if (!bdrv_dev_has_removable_media(bs)) {
|
913 |
error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
914 |
return;
|
915 |
} |
916 |
|
917 |
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
918 |
bdrv_dev_eject_request(bs, force); |
919 |
if (!force) {
|
920 |
error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
921 |
return;
|
922 |
} |
923 |
} |
924 |
|
925 |
bdrv_close(bs); |
926 |
} |
927 |
|
928 |
void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
929 |
{ |
930 |
BlockDriverState *bs; |
931 |
|
932 |
bs = bdrv_find(device); |
933 |
if (!bs) {
|
934 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
935 |
return;
|
936 |
} |
937 |
|
938 |
eject_device(bs, force, errp); |
939 |
} |
940 |
|
941 |
void qmp_block_passwd(const char *device, const char *password, Error **errp) |
942 |
{ |
943 |
BlockDriverState *bs; |
944 |
int err;
|
945 |
|
946 |
bs = bdrv_find(device); |
947 |
if (!bs) {
|
948 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
949 |
return;
|
950 |
} |
951 |
|
952 |
err = bdrv_set_key(bs, password); |
953 |
if (err == -EINVAL) {
|
954 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
955 |
return;
|
956 |
} else if (err < 0) { |
957 |
error_set(errp, QERR_INVALID_PASSWORD); |
958 |
return;
|
959 |
} |
960 |
} |
961 |
|
962 |
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
963 |
int bdrv_flags, BlockDriver *drv,
|
964 |
const char *password, Error **errp) |
965 |
{ |
966 |
if (bdrv_open(bs, filename, NULL, bdrv_flags, drv) < 0) { |
967 |
error_set(errp, QERR_OPEN_FILE_FAILED, filename); |
968 |
return;
|
969 |
} |
970 |
|
971 |
if (bdrv_key_required(bs)) {
|
972 |
if (password) {
|
973 |
if (bdrv_set_key(bs, password) < 0) { |
974 |
error_set(errp, QERR_INVALID_PASSWORD); |
975 |
} |
976 |
} else {
|
977 |
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), |
978 |
bdrv_get_encrypted_filename(bs)); |
979 |
} |
980 |
} else if (password) { |
981 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
982 |
} |
983 |
} |
984 |
|
985 |
void qmp_change_blockdev(const char *device, const char *filename, |
986 |
bool has_format, const char *format, Error **errp) |
987 |
{ |
988 |
BlockDriverState *bs; |
989 |
BlockDriver *drv = NULL;
|
990 |
int bdrv_flags;
|
991 |
Error *err = NULL;
|
992 |
|
993 |
bs = bdrv_find(device); |
994 |
if (!bs) {
|
995 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
996 |
return;
|
997 |
} |
998 |
|
999 |
if (format) {
|
1000 |
drv = bdrv_find_whitelisted_format(format); |
1001 |
if (!drv) {
|
1002 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1003 |
return;
|
1004 |
} |
1005 |
} |
1006 |
|
1007 |
eject_device(bs, 0, &err);
|
1008 |
if (error_is_set(&err)) {
|
1009 |
error_propagate(errp, err); |
1010 |
return;
|
1011 |
} |
1012 |
|
1013 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
1014 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
1015 |
|
1016 |
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
1017 |
} |
1018 |
|
1019 |
/* throttling disk I/O limits */
|
1020 |
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
1021 |
int64_t bps_wr, int64_t iops, int64_t iops_rd, |
1022 |
int64_t iops_wr, Error **errp) |
1023 |
{ |
1024 |
BlockIOLimit io_limits; |
1025 |
BlockDriverState *bs; |
1026 |
|
1027 |
bs = bdrv_find(device); |
1028 |
if (!bs) {
|
1029 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1030 |
return;
|
1031 |
} |
1032 |
|
1033 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; |
1034 |
io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; |
1035 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; |
1036 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; |
1037 |
io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; |
1038 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; |
1039 |
|
1040 |
if (!do_check_io_limits(&io_limits, errp)) {
|
1041 |
return;
|
1042 |
} |
1043 |
|
1044 |
bs->io_limits = io_limits; |
1045 |
bs->slice_time = BLOCK_IO_SLICE_TIME; |
1046 |
|
1047 |
if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
|
1048 |
bdrv_io_limits_enable(bs); |
1049 |
} else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { |
1050 |
bdrv_io_limits_disable(bs); |
1051 |
} else {
|
1052 |
if (bs->block_timer) {
|
1053 |
qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); |
1054 |
} |
1055 |
} |
1056 |
} |
1057 |
|
1058 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
1059 |
{ |
1060 |
const char *id = qdict_get_str(qdict, "id"); |
1061 |
BlockDriverState *bs; |
1062 |
|
1063 |
bs = bdrv_find(id); |
1064 |
if (!bs) {
|
1065 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
1066 |
return -1; |
1067 |
} |
1068 |
if (bdrv_in_use(bs)) {
|
1069 |
qerror_report(QERR_DEVICE_IN_USE, id); |
1070 |
return -1; |
1071 |
} |
1072 |
|
1073 |
/* quiesce block driver; prevent further io */
|
1074 |
bdrv_drain_all(); |
1075 |
bdrv_flush(bs); |
1076 |
bdrv_close(bs); |
1077 |
|
1078 |
/* if we have a device attached to this BlockDriverState
|
1079 |
* then we need to make the drive anonymous until the device
|
1080 |
* can be removed. If this is a drive with no device backing
|
1081 |
* then we can just get rid of the block driver state right here.
|
1082 |
*/
|
1083 |
if (bdrv_get_attached_dev(bs)) {
|
1084 |
bdrv_make_anon(bs); |
1085 |
} else {
|
1086 |
drive_uninit(drive_get_by_blockdev(bs)); |
1087 |
} |
1088 |
|
1089 |
return 0; |
1090 |
} |
1091 |
|
1092 |
void qmp_block_resize(const char *device, int64_t size, Error **errp) |
1093 |
{ |
1094 |
BlockDriverState *bs; |
1095 |
|
1096 |
bs = bdrv_find(device); |
1097 |
if (!bs) {
|
1098 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1099 |
return;
|
1100 |
} |
1101 |
|
1102 |
if (size < 0) { |
1103 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
1104 |
return;
|
1105 |
} |
1106 |
|
1107 |
switch (bdrv_truncate(bs, size)) {
|
1108 |
case 0: |
1109 |
break;
|
1110 |
case -ENOMEDIUM:
|
1111 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1112 |
break;
|
1113 |
case -ENOTSUP:
|
1114 |
error_set(errp, QERR_UNSUPPORTED); |
1115 |
break;
|
1116 |
case -EACCES:
|
1117 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
1118 |
break;
|
1119 |
case -EBUSY:
|
1120 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1121 |
break;
|
1122 |
default:
|
1123 |
error_set(errp, QERR_UNDEFINED_ERROR); |
1124 |
break;
|
1125 |
} |
1126 |
} |
1127 |
|
1128 |
static void block_job_cb(void *opaque, int ret) |
1129 |
{ |
1130 |
BlockDriverState *bs = opaque; |
1131 |
QObject *obj; |
1132 |
|
1133 |
trace_block_job_cb(bs, bs->job, ret); |
1134 |
|
1135 |
assert(bs->job); |
1136 |
obj = qobject_from_block_job(bs->job); |
1137 |
if (ret < 0) { |
1138 |
QDict *dict = qobject_to_qdict(obj); |
1139 |
qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
|
1140 |
} |
1141 |
|
1142 |
if (block_job_is_cancelled(bs->job)) {
|
1143 |
monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); |
1144 |
} else {
|
1145 |
monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); |
1146 |
} |
1147 |
qobject_decref(obj); |
1148 |
|
1149 |
drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); |
1150 |
} |
1151 |
|
1152 |
void qmp_block_stream(const char *device, bool has_base, |
1153 |
const char *base, bool has_speed, int64_t speed, |
1154 |
bool has_on_error, BlockdevOnError on_error,
|
1155 |
Error **errp) |
1156 |
{ |
1157 |
BlockDriverState *bs; |
1158 |
BlockDriverState *base_bs = NULL;
|
1159 |
Error *local_err = NULL;
|
1160 |
|
1161 |
if (!has_on_error) {
|
1162 |
on_error = BLOCKDEV_ON_ERROR_REPORT; |
1163 |
} |
1164 |
|
1165 |
bs = bdrv_find(device); |
1166 |
if (!bs) {
|
1167 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1168 |
return;
|
1169 |
} |
1170 |
|
1171 |
if (base) {
|
1172 |
base_bs = bdrv_find_backing_image(bs, base); |
1173 |
if (base_bs == NULL) { |
1174 |
error_set(errp, QERR_BASE_NOT_FOUND, base); |
1175 |
return;
|
1176 |
} |
1177 |
} |
1178 |
|
1179 |
stream_start(bs, base_bs, base, has_speed ? speed : 0,
|
1180 |
on_error, block_job_cb, bs, &local_err); |
1181 |
if (error_is_set(&local_err)) {
|
1182 |
error_propagate(errp, local_err); |
1183 |
return;
|
1184 |
} |
1185 |
|
1186 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1187 |
* underneath us.
|
1188 |
*/
|
1189 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1190 |
|
1191 |
trace_qmp_block_stream(bs, bs->job); |
1192 |
} |
1193 |
|
1194 |
void qmp_block_commit(const char *device, |
1195 |
bool has_base, const char *base, const char *top, |
1196 |
bool has_speed, int64_t speed,
|
1197 |
Error **errp) |
1198 |
{ |
1199 |
BlockDriverState *bs; |
1200 |
BlockDriverState *base_bs, *top_bs; |
1201 |
Error *local_err = NULL;
|
1202 |
/* This will be part of the QMP command, if/when the
|
1203 |
* BlockdevOnError change for blkmirror makes it in
|
1204 |
*/
|
1205 |
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
1206 |
|
1207 |
/* drain all i/o before commits */
|
1208 |
bdrv_drain_all(); |
1209 |
|
1210 |
bs = bdrv_find(device); |
1211 |
if (!bs) {
|
1212 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1213 |
return;
|
1214 |
} |
1215 |
|
1216 |
/* default top_bs is the active layer */
|
1217 |
top_bs = bs; |
1218 |
|
1219 |
if (top) {
|
1220 |
if (strcmp(bs->filename, top) != 0) { |
1221 |
top_bs = bdrv_find_backing_image(bs, top); |
1222 |
} |
1223 |
} |
1224 |
|
1225 |
if (top_bs == NULL) { |
1226 |
error_setg(errp, "Top image file %s not found", top ? top : "NULL"); |
1227 |
return;
|
1228 |
} |
1229 |
|
1230 |
if (has_base && base) {
|
1231 |
base_bs = bdrv_find_backing_image(top_bs, base); |
1232 |
} else {
|
1233 |
base_bs = bdrv_find_base(top_bs); |
1234 |
} |
1235 |
|
1236 |
if (base_bs == NULL) { |
1237 |
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
1238 |
return;
|
1239 |
} |
1240 |
|
1241 |
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, |
1242 |
&local_err); |
1243 |
if (local_err != NULL) { |
1244 |
error_propagate(errp, local_err); |
1245 |
return;
|
1246 |
} |
1247 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1248 |
* underneath us.
|
1249 |
*/
|
1250 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1251 |
} |
1252 |
|
1253 |
#define DEFAULT_MIRROR_BUF_SIZE (10 << 20) |
1254 |
|
1255 |
void qmp_drive_mirror(const char *device, const char *target, |
1256 |
bool has_format, const char *format, |
1257 |
enum MirrorSyncMode sync,
|
1258 |
bool has_mode, enum NewImageMode mode, |
1259 |
bool has_speed, int64_t speed,
|
1260 |
bool has_granularity, uint32_t granularity,
|
1261 |
bool has_buf_size, int64_t buf_size,
|
1262 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1263 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1264 |
Error **errp) |
1265 |
{ |
1266 |
BlockDriverState *bs; |
1267 |
BlockDriverState *source, *target_bs; |
1268 |
BlockDriver *proto_drv; |
1269 |
BlockDriver *drv = NULL;
|
1270 |
Error *local_err = NULL;
|
1271 |
int flags;
|
1272 |
uint64_t size; |
1273 |
int ret;
|
1274 |
|
1275 |
if (!has_speed) {
|
1276 |
speed = 0;
|
1277 |
} |
1278 |
if (!has_on_source_error) {
|
1279 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1280 |
} |
1281 |
if (!has_on_target_error) {
|
1282 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1283 |
} |
1284 |
if (!has_mode) {
|
1285 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1286 |
} |
1287 |
if (!has_granularity) {
|
1288 |
granularity = 0;
|
1289 |
} |
1290 |
if (!has_buf_size) {
|
1291 |
buf_size = DEFAULT_MIRROR_BUF_SIZE; |
1292 |
} |
1293 |
|
1294 |
if (granularity != 0 && (granularity < 512 || granularity > 1048576 * 64)) { |
1295 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1296 |
return;
|
1297 |
} |
1298 |
if (granularity & (granularity - 1)) { |
1299 |
error_set(errp, QERR_INVALID_PARAMETER, device); |
1300 |
return;
|
1301 |
} |
1302 |
|
1303 |
bs = bdrv_find(device); |
1304 |
if (!bs) {
|
1305 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1306 |
return;
|
1307 |
} |
1308 |
|
1309 |
if (!bdrv_is_inserted(bs)) {
|
1310 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1311 |
return;
|
1312 |
} |
1313 |
|
1314 |
if (!has_format) {
|
1315 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1316 |
} |
1317 |
if (format) {
|
1318 |
drv = bdrv_find_format(format); |
1319 |
if (!drv) {
|
1320 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1321 |
return;
|
1322 |
} |
1323 |
} |
1324 |
|
1325 |
if (bdrv_in_use(bs)) {
|
1326 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1327 |
return;
|
1328 |
} |
1329 |
|
1330 |
flags = bs->open_flags | BDRV_O_RDWR; |
1331 |
source = bs->backing_hd; |
1332 |
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
1333 |
sync = MIRROR_SYNC_MODE_FULL; |
1334 |
} |
1335 |
|
1336 |
proto_drv = bdrv_find_protocol(target); |
1337 |
if (!proto_drv) {
|
1338 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1339 |
return;
|
1340 |
} |
1341 |
|
1342 |
bdrv_get_geometry(bs, &size); |
1343 |
size *= 512;
|
1344 |
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
|
1345 |
/* create new image w/o backing file */
|
1346 |
assert(format && drv); |
1347 |
bdrv_img_create(target, format, |
1348 |
NULL, NULL, NULL, size, flags, &local_err, false); |
1349 |
} else {
|
1350 |
switch (mode) {
|
1351 |
case NEW_IMAGE_MODE_EXISTING:
|
1352 |
ret = 0;
|
1353 |
break;
|
1354 |
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
1355 |
/* create new image with backing file */
|
1356 |
bdrv_img_create(target, format, |
1357 |
source->filename, |
1358 |
source->drv->format_name, |
1359 |
NULL, size, flags, &local_err, false); |
1360 |
break;
|
1361 |
default:
|
1362 |
abort(); |
1363 |
} |
1364 |
} |
1365 |
|
1366 |
if (error_is_set(&local_err)) {
|
1367 |
error_propagate(errp, local_err); |
1368 |
return;
|
1369 |
} |
1370 |
|
1371 |
/* Mirroring takes care of copy-on-write using the source's backing
|
1372 |
* file.
|
1373 |
*/
|
1374 |
target_bs = bdrv_new("");
|
1375 |
ret = bdrv_open(target_bs, target, NULL, flags | BDRV_O_NO_BACKING, drv);
|
1376 |
|
1377 |
if (ret < 0) { |
1378 |
bdrv_delete(target_bs); |
1379 |
error_set(errp, QERR_OPEN_FILE_FAILED, target); |
1380 |
return;
|
1381 |
} |
1382 |
|
1383 |
mirror_start(bs, target_bs, speed, granularity, buf_size, sync, |
1384 |
on_source_error, on_target_error, |
1385 |
block_job_cb, bs, &local_err); |
1386 |
if (local_err != NULL) { |
1387 |
bdrv_delete(target_bs); |
1388 |
error_propagate(errp, local_err); |
1389 |
return;
|
1390 |
} |
1391 |
|
1392 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1393 |
* underneath us.
|
1394 |
*/
|
1395 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1396 |
} |
1397 |
|
1398 |
static BlockJob *find_block_job(const char *device) |
1399 |
{ |
1400 |
BlockDriverState *bs; |
1401 |
|
1402 |
bs = bdrv_find(device); |
1403 |
if (!bs || !bs->job) {
|
1404 |
return NULL; |
1405 |
} |
1406 |
return bs->job;
|
1407 |
} |
1408 |
|
1409 |
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
1410 |
{ |
1411 |
BlockJob *job = find_block_job(device); |
1412 |
|
1413 |
if (!job) {
|
1414 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1415 |
return;
|
1416 |
} |
1417 |
|
1418 |
block_job_set_speed(job, speed, errp); |
1419 |
} |
1420 |
|
1421 |
void qmp_block_job_cancel(const char *device, |
1422 |
bool has_force, bool force, Error **errp) |
1423 |
{ |
1424 |
BlockJob *job = find_block_job(device); |
1425 |
|
1426 |
if (!has_force) {
|
1427 |
force = false;
|
1428 |
} |
1429 |
|
1430 |
if (!job) {
|
1431 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1432 |
return;
|
1433 |
} |
1434 |
if (job->paused && !force) {
|
1435 |
error_set(errp, QERR_BLOCK_JOB_PAUSED, device); |
1436 |
return;
|
1437 |
} |
1438 |
|
1439 |
trace_qmp_block_job_cancel(job); |
1440 |
block_job_cancel(job); |
1441 |
} |
1442 |
|
1443 |
void qmp_block_job_pause(const char *device, Error **errp) |
1444 |
{ |
1445 |
BlockJob *job = find_block_job(device); |
1446 |
|
1447 |
if (!job) {
|
1448 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1449 |
return;
|
1450 |
} |
1451 |
|
1452 |
trace_qmp_block_job_pause(job); |
1453 |
block_job_pause(job); |
1454 |
} |
1455 |
|
1456 |
void qmp_block_job_resume(const char *device, Error **errp) |
1457 |
{ |
1458 |
BlockJob *job = find_block_job(device); |
1459 |
|
1460 |
if (!job) {
|
1461 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1462 |
return;
|
1463 |
} |
1464 |
|
1465 |
trace_qmp_block_job_resume(job); |
1466 |
block_job_resume(job); |
1467 |
} |
1468 |
|
1469 |
void qmp_block_job_complete(const char *device, Error **errp) |
1470 |
{ |
1471 |
BlockJob *job = find_block_job(device); |
1472 |
|
1473 |
if (!job) {
|
1474 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1475 |
return;
|
1476 |
} |
1477 |
|
1478 |
trace_qmp_block_job_complete(job); |
1479 |
block_job_complete(job, errp); |
1480 |
} |
1481 |
|
1482 |
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
1483 |
{ |
1484 |
BlockJobInfoList **prev = opaque; |
1485 |
BlockJob *job = bs->job; |
1486 |
|
1487 |
if (job) {
|
1488 |
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
1489 |
elem->value = block_job_query(bs->job); |
1490 |
(*prev)->next = elem; |
1491 |
*prev = elem; |
1492 |
} |
1493 |
} |
1494 |
|
1495 |
BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
1496 |
{ |
1497 |
/* Dummy is a fake list element for holding the head pointer */
|
1498 |
BlockJobInfoList dummy = {}; |
1499 |
BlockJobInfoList *prev = &dummy; |
1500 |
bdrv_iterate(do_qmp_query_block_jobs_one, &prev); |
1501 |
return dummy.next;
|
1502 |
} |
1503 |
|
1504 |
QemuOptsList qemu_common_drive_opts = { |
1505 |
.name = "drive",
|
1506 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_common_drive_opts.head), |
1507 |
.desc = { |
1508 |
{ |
1509 |
.name = "bus",
|
1510 |
.type = QEMU_OPT_NUMBER, |
1511 |
.help = "bus number",
|
1512 |
},{ |
1513 |
.name = "unit",
|
1514 |
.type = QEMU_OPT_NUMBER, |
1515 |
.help = "unit number (i.e. lun for scsi)",
|
1516 |
},{ |
1517 |
.name = "if",
|
1518 |
.type = QEMU_OPT_STRING, |
1519 |
.help = "interface (ide, scsi, sd, mtd, floppy, pflash, virtio)",
|
1520 |
},{ |
1521 |
.name = "index",
|
1522 |
.type = QEMU_OPT_NUMBER, |
1523 |
.help = "index number",
|
1524 |
},{ |
1525 |
.name = "cyls",
|
1526 |
.type = QEMU_OPT_NUMBER, |
1527 |
.help = "number of cylinders (ide disk geometry)",
|
1528 |
},{ |
1529 |
.name = "heads",
|
1530 |
.type = QEMU_OPT_NUMBER, |
1531 |
.help = "number of heads (ide disk geometry)",
|
1532 |
},{ |
1533 |
.name = "secs",
|
1534 |
.type = QEMU_OPT_NUMBER, |
1535 |
.help = "number of sectors (ide disk geometry)",
|
1536 |
},{ |
1537 |
.name = "trans",
|
1538 |
.type = QEMU_OPT_STRING, |
1539 |
.help = "chs translation (auto, lba. none)",
|
1540 |
},{ |
1541 |
.name = "media",
|
1542 |
.type = QEMU_OPT_STRING, |
1543 |
.help = "media type (disk, cdrom)",
|
1544 |
},{ |
1545 |
.name = "snapshot",
|
1546 |
.type = QEMU_OPT_BOOL, |
1547 |
.help = "enable/disable snapshot mode",
|
1548 |
},{ |
1549 |
.name = "file",
|
1550 |
.type = QEMU_OPT_STRING, |
1551 |
.help = "disk image",
|
1552 |
},{ |
1553 |
.name = "discard",
|
1554 |
.type = QEMU_OPT_STRING, |
1555 |
.help = "discard operation (ignore/off, unmap/on)",
|
1556 |
},{ |
1557 |
.name = "cache",
|
1558 |
.type = QEMU_OPT_STRING, |
1559 |
.help = "host cache usage (none, writeback, writethrough, "
|
1560 |
"directsync, unsafe)",
|
1561 |
},{ |
1562 |
.name = "aio",
|
1563 |
.type = QEMU_OPT_STRING, |
1564 |
.help = "host AIO implementation (threads, native)",
|
1565 |
},{ |
1566 |
.name = "format",
|
1567 |
.type = QEMU_OPT_STRING, |
1568 |
.help = "disk format (raw, qcow2, ...)",
|
1569 |
},{ |
1570 |
.name = "serial",
|
1571 |
.type = QEMU_OPT_STRING, |
1572 |
.help = "disk serial number",
|
1573 |
},{ |
1574 |
.name = "rerror",
|
1575 |
.type = QEMU_OPT_STRING, |
1576 |
.help = "read error action",
|
1577 |
},{ |
1578 |
.name = "werror",
|
1579 |
.type = QEMU_OPT_STRING, |
1580 |
.help = "write error action",
|
1581 |
},{ |
1582 |
.name = "addr",
|
1583 |
.type = QEMU_OPT_STRING, |
1584 |
.help = "pci address (virtio only)",
|
1585 |
},{ |
1586 |
.name = "readonly",
|
1587 |
.type = QEMU_OPT_BOOL, |
1588 |
.help = "open drive file as read-only",
|
1589 |
},{ |
1590 |
.name = "iops",
|
1591 |
.type = QEMU_OPT_NUMBER, |
1592 |
.help = "limit total I/O operations per second",
|
1593 |
},{ |
1594 |
.name = "iops_rd",
|
1595 |
.type = QEMU_OPT_NUMBER, |
1596 |
.help = "limit read operations per second",
|
1597 |
},{ |
1598 |
.name = "iops_wr",
|
1599 |
.type = QEMU_OPT_NUMBER, |
1600 |
.help = "limit write operations per second",
|
1601 |
},{ |
1602 |
.name = "bps",
|
1603 |
.type = QEMU_OPT_NUMBER, |
1604 |
.help = "limit total bytes per second",
|
1605 |
},{ |
1606 |
.name = "bps_rd",
|
1607 |
.type = QEMU_OPT_NUMBER, |
1608 |
.help = "limit read bytes per second",
|
1609 |
},{ |
1610 |
.name = "bps_wr",
|
1611 |
.type = QEMU_OPT_NUMBER, |
1612 |
.help = "limit write bytes per second",
|
1613 |
},{ |
1614 |
.name = "copy-on-read",
|
1615 |
.type = QEMU_OPT_BOOL, |
1616 |
.help = "copy read data from backing file into image file",
|
1617 |
},{ |
1618 |
.name = "boot",
|
1619 |
.type = QEMU_OPT_BOOL, |
1620 |
.help = "(deprecated, ignored)",
|
1621 |
}, |
1622 |
{ /* end of list */ }
|
1623 |
}, |
1624 |
}; |
1625 |
|
1626 |
QemuOptsList qemu_drive_opts = { |
1627 |
.name = "drive",
|
1628 |
.head = QTAILQ_HEAD_INITIALIZER(qemu_drive_opts.head), |
1629 |
.desc = { |
1630 |
/*
|
1631 |
* no elements => accept any params
|
1632 |
* validation will happen later
|
1633 |
*/
|
1634 |
{ /* end of list */ }
|
1635 |
}, |
1636 |
}; |