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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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static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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static const char *const if_name[IF_COUNT] = { |
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[IF_NONE] = "none",
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[IF_IDE] = "ide",
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[IF_SCSI] = "scsi",
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[IF_FLOPPY] = "floppy",
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[IF_PFLASH] = "pflash",
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[IF_MTD] = "mtd",
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[IF_SD] = "sd",
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[IF_VIRTIO] = "virtio",
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[IF_XEN] = "xen",
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}; |
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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); |
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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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} |
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static bool do_check_io_limits(BlockIOLimit *io_limits) |
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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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return false; |
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} |
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return true; |
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} |
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DriveInfo *drive_init(QemuOpts *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; |
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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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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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translation = BIOS_ATA_TRANSLATION_AUTO; |
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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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copy_on_read = qemu_opt_get_bool(opts, "copy-on-read", false); |
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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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for (type = 0; type < IF_COUNT && strcmp(buf, if_name[type]); type++) |
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; |
323 |
if (type == IF_COUNT) {
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error_report("unsupported bus type '%s'", buf);
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return NULL; |
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} |
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} else {
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type = block_default_type; |
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} |
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max_devs = if_max_devs[type]; |
332 |
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if (cyls || heads || secs) {
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if (cyls < 1) { |
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error_report("invalid physical cyls number");
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return NULL; |
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} |
338 |
if (heads < 1) { |
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error_report("invalid physical heads number");
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return NULL; |
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} |
342 |
if (secs < 1) { |
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error_report("invalid physical secs number");
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return NULL; |
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} |
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} |
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if ((buf = qemu_opt_get(opts, "trans")) != NULL) { |
349 |
if (!cyls) {
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error_report("'%s' trans must be used with cyls, heads and secs",
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buf); |
352 |
return NULL; |
353 |
} |
354 |
if (!strcmp(buf, "none")) |
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translation = BIOS_ATA_TRANSLATION_NONE; |
356 |
else if (!strcmp(buf, "lba")) |
357 |
translation = BIOS_ATA_TRANSLATION_LBA; |
358 |
else if (!strcmp(buf, "auto")) |
359 |
translation = BIOS_ATA_TRANSLATION_AUTO; |
360 |
else {
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361 |
error_report("'%s' invalid translation type", buf);
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return NULL; |
363 |
} |
364 |
} |
365 |
|
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if ((buf = qemu_opt_get(opts, "media")) != NULL) { |
367 |
if (!strcmp(buf, "disk")) { |
368 |
media = MEDIA_DISK; |
369 |
} else if (!strcmp(buf, "cdrom")) { |
370 |
if (cyls || secs || heads) {
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371 |
error_report("CHS can't be set with media=%s", buf);
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return NULL; |
373 |
} |
374 |
media = MEDIA_CDROM; |
375 |
} else {
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376 |
error_report("'%s' invalid media", buf);
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377 |
return NULL; |
378 |
} |
379 |
} |
380 |
|
381 |
bdrv_flags |= BDRV_O_CACHE_WB; |
382 |
if ((buf = qemu_opt_get(opts, "cache")) != NULL) { |
383 |
if (bdrv_parse_cache_flags(buf, &bdrv_flags) != 0) { |
384 |
error_report("invalid cache option");
|
385 |
return NULL; |
386 |
} |
387 |
} |
388 |
|
389 |
#ifdef CONFIG_LINUX_AIO
|
390 |
if ((buf = qemu_opt_get(opts, "aio")) != NULL) { |
391 |
if (!strcmp(buf, "native")) { |
392 |
bdrv_flags |= BDRV_O_NATIVE_AIO; |
393 |
} else if (!strcmp(buf, "threads")) { |
394 |
/* this is the default */
|
395 |
} else {
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396 |
error_report("invalid aio option");
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397 |
return NULL; |
398 |
} |
399 |
} |
400 |
#endif
|
401 |
|
402 |
if ((buf = qemu_opt_get(opts, "format")) != NULL) { |
403 |
if (is_help_option(buf)) {
|
404 |
error_printf("Supported formats:");
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405 |
bdrv_iterate_format(bdrv_format_print, NULL);
|
406 |
error_printf("\n");
|
407 |
return NULL; |
408 |
} |
409 |
drv = bdrv_find_whitelisted_format(buf); |
410 |
if (!drv) {
|
411 |
error_report("'%s' invalid format", buf);
|
412 |
return NULL; |
413 |
} |
414 |
} |
415 |
|
416 |
/* disk I/O throttling */
|
417 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = |
418 |
qemu_opt_get_number(opts, "bps", 0); |
419 |
io_limits.bps[BLOCK_IO_LIMIT_READ] = |
420 |
qemu_opt_get_number(opts, "bps_rd", 0); |
421 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = |
422 |
qemu_opt_get_number(opts, "bps_wr", 0); |
423 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL] = |
424 |
qemu_opt_get_number(opts, "iops", 0); |
425 |
io_limits.iops[BLOCK_IO_LIMIT_READ] = |
426 |
qemu_opt_get_number(opts, "iops_rd", 0); |
427 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE] = |
428 |
qemu_opt_get_number(opts, "iops_wr", 0); |
429 |
|
430 |
if (!do_check_io_limits(&io_limits)) {
|
431 |
error_report("bps(iops) and bps_rd/bps_wr(iops_rd/iops_wr) "
|
432 |
"cannot be used at the same time");
|
433 |
return NULL; |
434 |
} |
435 |
|
436 |
if (qemu_opt_get(opts, "boot") != NULL) { |
437 |
fprintf(stderr, "qemu-kvm: boot=on|off is deprecated and will be "
|
438 |
"ignored. Future versions will reject this parameter. Please "
|
439 |
"update your scripts.\n");
|
440 |
} |
441 |
|
442 |
on_write_error = BLOCKDEV_ON_ERROR_ENOSPC; |
443 |
if ((buf = qemu_opt_get(opts, "werror")) != NULL) { |
444 |
if (type != IF_IDE && type != IF_SCSI && type != IF_VIRTIO && type != IF_NONE) {
|
445 |
error_report("werror is not supported by this bus type");
|
446 |
return NULL; |
447 |
} |
448 |
|
449 |
on_write_error = parse_block_error_action(buf, 0);
|
450 |
if (on_write_error < 0) { |
451 |
return NULL; |
452 |
} |
453 |
} |
454 |
|
455 |
on_read_error = BLOCKDEV_ON_ERROR_REPORT; |
456 |
if ((buf = qemu_opt_get(opts, "rerror")) != NULL) { |
457 |
if (type != IF_IDE && type != IF_VIRTIO && type != IF_SCSI && type != IF_NONE) {
|
458 |
error_report("rerror is not supported by this bus type");
|
459 |
return NULL; |
460 |
} |
461 |
|
462 |
on_read_error = parse_block_error_action(buf, 1);
|
463 |
if (on_read_error < 0) { |
464 |
return NULL; |
465 |
} |
466 |
} |
467 |
|
468 |
if ((devaddr = qemu_opt_get(opts, "addr")) != NULL) { |
469 |
if (type != IF_VIRTIO) {
|
470 |
error_report("addr is not supported by this bus type");
|
471 |
return NULL; |
472 |
} |
473 |
} |
474 |
|
475 |
/* compute bus and unit according index */
|
476 |
|
477 |
if (index != -1) { |
478 |
if (bus_id != 0 || unit_id != -1) { |
479 |
error_report("index cannot be used with bus and unit");
|
480 |
return NULL; |
481 |
} |
482 |
bus_id = drive_index_to_bus_id(type, index); |
483 |
unit_id = drive_index_to_unit_id(type, index); |
484 |
} |
485 |
|
486 |
/* if user doesn't specify a unit_id,
|
487 |
* try to find the first free
|
488 |
*/
|
489 |
|
490 |
if (unit_id == -1) { |
491 |
unit_id = 0;
|
492 |
while (drive_get(type, bus_id, unit_id) != NULL) { |
493 |
unit_id++; |
494 |
if (max_devs && unit_id >= max_devs) {
|
495 |
unit_id -= max_devs; |
496 |
bus_id++; |
497 |
} |
498 |
} |
499 |
} |
500 |
|
501 |
/* check unit id */
|
502 |
|
503 |
if (max_devs && unit_id >= max_devs) {
|
504 |
error_report("unit %d too big (max is %d)",
|
505 |
unit_id, max_devs - 1);
|
506 |
return NULL; |
507 |
} |
508 |
|
509 |
/*
|
510 |
* catch multiple definitions
|
511 |
*/
|
512 |
|
513 |
if (drive_get(type, bus_id, unit_id) != NULL) { |
514 |
error_report("drive with bus=%d, unit=%d (index=%d) exists",
|
515 |
bus_id, unit_id, index); |
516 |
return NULL; |
517 |
} |
518 |
|
519 |
/* init */
|
520 |
|
521 |
dinfo = g_malloc0(sizeof(*dinfo));
|
522 |
if ((buf = qemu_opts_id(opts)) != NULL) { |
523 |
dinfo->id = g_strdup(buf); |
524 |
} else {
|
525 |
/* no id supplied -> create one */
|
526 |
dinfo->id = g_malloc0(32);
|
527 |
if (type == IF_IDE || type == IF_SCSI)
|
528 |
mediastr = (media == MEDIA_CDROM) ? "-cd" : "-hd"; |
529 |
if (max_devs)
|
530 |
snprintf(dinfo->id, 32, "%s%i%s%i", |
531 |
if_name[type], bus_id, mediastr, unit_id); |
532 |
else
|
533 |
snprintf(dinfo->id, 32, "%s%s%i", |
534 |
if_name[type], mediastr, unit_id); |
535 |
} |
536 |
dinfo->bdrv = bdrv_new(dinfo->id); |
537 |
dinfo->bdrv->open_flags = snapshot ? BDRV_O_SNAPSHOT : 0;
|
538 |
dinfo->bdrv->read_only = ro; |
539 |
dinfo->devaddr = devaddr; |
540 |
dinfo->type = type; |
541 |
dinfo->bus = bus_id; |
542 |
dinfo->unit = unit_id; |
543 |
dinfo->cyls = cyls; |
544 |
dinfo->heads = heads; |
545 |
dinfo->secs = secs; |
546 |
dinfo->trans = translation; |
547 |
dinfo->opts = opts; |
548 |
dinfo->refcount = 1;
|
549 |
dinfo->serial = serial; |
550 |
QTAILQ_INSERT_TAIL(&drives, dinfo, next); |
551 |
|
552 |
bdrv_set_on_error(dinfo->bdrv, on_read_error, on_write_error); |
553 |
|
554 |
/* disk I/O throttling */
|
555 |
bdrv_set_io_limits(dinfo->bdrv, &io_limits); |
556 |
|
557 |
switch(type) {
|
558 |
case IF_IDE:
|
559 |
case IF_SCSI:
|
560 |
case IF_XEN:
|
561 |
case IF_NONE:
|
562 |
dinfo->media_cd = media == MEDIA_CDROM; |
563 |
break;
|
564 |
case IF_SD:
|
565 |
case IF_FLOPPY:
|
566 |
case IF_PFLASH:
|
567 |
case IF_MTD:
|
568 |
break;
|
569 |
case IF_VIRTIO:
|
570 |
/* add virtio block device */
|
571 |
opts = qemu_opts_create_nofail(qemu_find_opts("device"));
|
572 |
if (arch_type == QEMU_ARCH_S390X) {
|
573 |
qemu_opt_set(opts, "driver", "virtio-blk-s390"); |
574 |
} else {
|
575 |
qemu_opt_set(opts, "driver", "virtio-blk-pci"); |
576 |
} |
577 |
qemu_opt_set(opts, "drive", dinfo->id);
|
578 |
if (devaddr)
|
579 |
qemu_opt_set(opts, "addr", devaddr);
|
580 |
break;
|
581 |
default:
|
582 |
abort(); |
583 |
} |
584 |
if (!file || !*file) {
|
585 |
return dinfo;
|
586 |
} |
587 |
if (snapshot) {
|
588 |
/* always use cache=unsafe with snapshot */
|
589 |
bdrv_flags &= ~BDRV_O_CACHE_MASK; |
590 |
bdrv_flags |= (BDRV_O_SNAPSHOT|BDRV_O_CACHE_WB|BDRV_O_NO_FLUSH); |
591 |
} |
592 |
|
593 |
if (copy_on_read) {
|
594 |
bdrv_flags |= BDRV_O_COPY_ON_READ; |
595 |
} |
596 |
|
597 |
if (runstate_check(RUN_STATE_INMIGRATE)) {
|
598 |
bdrv_flags |= BDRV_O_INCOMING; |
599 |
} |
600 |
|
601 |
if (media == MEDIA_CDROM) {
|
602 |
/* CDROM is fine for any interface, don't check. */
|
603 |
ro = 1;
|
604 |
} else if (ro == 1) { |
605 |
if (type != IF_SCSI && type != IF_VIRTIO && type != IF_FLOPPY &&
|
606 |
type != IF_NONE && type != IF_PFLASH) { |
607 |
error_report("readonly not supported by this bus type");
|
608 |
goto err;
|
609 |
} |
610 |
} |
611 |
|
612 |
bdrv_flags |= ro ? 0 : BDRV_O_RDWR;
|
613 |
|
614 |
if (ro && copy_on_read) {
|
615 |
error_report("warning: disabling copy_on_read on readonly drive");
|
616 |
} |
617 |
|
618 |
ret = bdrv_open(dinfo->bdrv, file, bdrv_flags, drv); |
619 |
if (ret < 0) { |
620 |
error_report("could not open disk image %s: %s",
|
621 |
file, strerror(-ret)); |
622 |
goto err;
|
623 |
} |
624 |
|
625 |
if (bdrv_key_required(dinfo->bdrv))
|
626 |
autostart = 0;
|
627 |
return dinfo;
|
628 |
|
629 |
err:
|
630 |
bdrv_delete(dinfo->bdrv); |
631 |
g_free(dinfo->id); |
632 |
QTAILQ_REMOVE(&drives, dinfo, next); |
633 |
g_free(dinfo); |
634 |
return NULL; |
635 |
} |
636 |
|
637 |
void do_commit(Monitor *mon, const QDict *qdict) |
638 |
{ |
639 |
const char *device = qdict_get_str(qdict, "device"); |
640 |
BlockDriverState *bs; |
641 |
int ret;
|
642 |
|
643 |
if (!strcmp(device, "all")) { |
644 |
ret = bdrv_commit_all(); |
645 |
if (ret == -EBUSY) {
|
646 |
qerror_report(QERR_DEVICE_IN_USE, device); |
647 |
return;
|
648 |
} |
649 |
} else {
|
650 |
bs = bdrv_find(device); |
651 |
if (!bs) {
|
652 |
qerror_report(QERR_DEVICE_NOT_FOUND, device); |
653 |
return;
|
654 |
} |
655 |
ret = bdrv_commit(bs); |
656 |
if (ret == -EBUSY) {
|
657 |
qerror_report(QERR_DEVICE_IN_USE, device); |
658 |
return;
|
659 |
} |
660 |
} |
661 |
} |
662 |
|
663 |
static void blockdev_do_action(int kind, void *data, Error **errp) |
664 |
{ |
665 |
BlockdevAction action; |
666 |
BlockdevActionList list; |
667 |
|
668 |
action.kind = kind; |
669 |
action.data = data; |
670 |
list.value = &action; |
671 |
list.next = NULL;
|
672 |
qmp_transaction(&list, errp); |
673 |
} |
674 |
|
675 |
void qmp_blockdev_snapshot_sync(const char *device, const char *snapshot_file, |
676 |
bool has_format, const char *format, |
677 |
bool has_mode, enum NewImageMode mode, |
678 |
Error **errp) |
679 |
{ |
680 |
BlockdevSnapshot snapshot = { |
681 |
.device = (char *) device,
|
682 |
.snapshot_file = (char *) snapshot_file,
|
683 |
.has_format = has_format, |
684 |
.format = (char *) format,
|
685 |
.has_mode = has_mode, |
686 |
.mode = mode, |
687 |
}; |
688 |
blockdev_do_action(BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC, &snapshot, |
689 |
errp); |
690 |
} |
691 |
|
692 |
|
693 |
/* New and old BlockDriverState structs for group snapshots */
|
694 |
typedef struct BlkTransactionStates { |
695 |
BlockDriverState *old_bs; |
696 |
BlockDriverState *new_bs; |
697 |
QSIMPLEQ_ENTRY(BlkTransactionStates) entry; |
698 |
} BlkTransactionStates; |
699 |
|
700 |
/*
|
701 |
* 'Atomic' group snapshots. The snapshots are taken as a set, and if any fail
|
702 |
* then we do not pivot any of the devices in the group, and abandon the
|
703 |
* snapshots
|
704 |
*/
|
705 |
void qmp_transaction(BlockdevActionList *dev_list, Error **errp)
|
706 |
{ |
707 |
int ret = 0; |
708 |
BlockdevActionList *dev_entry = dev_list; |
709 |
BlkTransactionStates *states, *next; |
710 |
Error *local_err = NULL;
|
711 |
|
712 |
QSIMPLEQ_HEAD(snap_bdrv_states, BlkTransactionStates) snap_bdrv_states; |
713 |
QSIMPLEQ_INIT(&snap_bdrv_states); |
714 |
|
715 |
/* drain all i/o before any snapshots */
|
716 |
bdrv_drain_all(); |
717 |
|
718 |
/* We don't do anything in this loop that commits us to the snapshot */
|
719 |
while (NULL != dev_entry) { |
720 |
BlockdevAction *dev_info = NULL;
|
721 |
BlockDriver *proto_drv; |
722 |
BlockDriver *drv; |
723 |
int flags;
|
724 |
enum NewImageMode mode;
|
725 |
const char *new_image_file; |
726 |
const char *device; |
727 |
const char *format = "qcow2"; |
728 |
|
729 |
dev_info = dev_entry->value; |
730 |
dev_entry = dev_entry->next; |
731 |
|
732 |
states = g_malloc0(sizeof(BlkTransactionStates));
|
733 |
QSIMPLEQ_INSERT_TAIL(&snap_bdrv_states, states, entry); |
734 |
|
735 |
switch (dev_info->kind) {
|
736 |
case BLOCKDEV_ACTION_KIND_BLOCKDEV_SNAPSHOT_SYNC:
|
737 |
device = dev_info->blockdev_snapshot_sync->device; |
738 |
if (!dev_info->blockdev_snapshot_sync->has_mode) {
|
739 |
dev_info->blockdev_snapshot_sync->mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
740 |
} |
741 |
new_image_file = dev_info->blockdev_snapshot_sync->snapshot_file; |
742 |
if (dev_info->blockdev_snapshot_sync->has_format) {
|
743 |
format = dev_info->blockdev_snapshot_sync->format; |
744 |
} |
745 |
mode = dev_info->blockdev_snapshot_sync->mode; |
746 |
break;
|
747 |
default:
|
748 |
abort(); |
749 |
} |
750 |
|
751 |
drv = bdrv_find_format(format); |
752 |
if (!drv) {
|
753 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
754 |
goto delete_and_fail;
|
755 |
} |
756 |
|
757 |
states->old_bs = bdrv_find(device); |
758 |
if (!states->old_bs) {
|
759 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
760 |
goto delete_and_fail;
|
761 |
} |
762 |
|
763 |
if (!bdrv_is_inserted(states->old_bs)) {
|
764 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
765 |
goto delete_and_fail;
|
766 |
} |
767 |
|
768 |
if (bdrv_in_use(states->old_bs)) {
|
769 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
770 |
goto delete_and_fail;
|
771 |
} |
772 |
|
773 |
if (!bdrv_is_read_only(states->old_bs)) {
|
774 |
if (bdrv_flush(states->old_bs)) {
|
775 |
error_set(errp, QERR_IO_ERROR); |
776 |
goto delete_and_fail;
|
777 |
} |
778 |
} |
779 |
|
780 |
flags = states->old_bs->open_flags; |
781 |
|
782 |
proto_drv = bdrv_find_protocol(new_image_file); |
783 |
if (!proto_drv) {
|
784 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
785 |
goto delete_and_fail;
|
786 |
} |
787 |
|
788 |
/* create new image w/backing file */
|
789 |
if (mode != NEW_IMAGE_MODE_EXISTING) {
|
790 |
bdrv_img_create(new_image_file, format, |
791 |
states->old_bs->filename, |
792 |
states->old_bs->drv->format_name, |
793 |
NULL, -1, flags, &local_err); |
794 |
if (error_is_set(&local_err)) {
|
795 |
error_propagate(errp, local_err); |
796 |
goto delete_and_fail;
|
797 |
} |
798 |
} |
799 |
|
800 |
/* We will manually add the backing_hd field to the bs later */
|
801 |
states->new_bs = bdrv_new("");
|
802 |
ret = bdrv_open(states->new_bs, new_image_file, |
803 |
flags | BDRV_O_NO_BACKING, drv); |
804 |
if (ret != 0) { |
805 |
error_set(errp, QERR_OPEN_FILE_FAILED, new_image_file); |
806 |
goto delete_and_fail;
|
807 |
} |
808 |
} |
809 |
|
810 |
|
811 |
/* Now we are going to do the actual pivot. Everything up to this point
|
812 |
* is reversible, but we are committed at this point */
|
813 |
QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { |
814 |
/* This removes our old bs from the bdrv_states, and adds the new bs */
|
815 |
bdrv_append(states->new_bs, states->old_bs); |
816 |
/* We don't need (or want) to use the transactional
|
817 |
* bdrv_reopen_multiple() across all the entries at once, because we
|
818 |
* don't want to abort all of them if one of them fails the reopen */
|
819 |
bdrv_reopen(states->new_bs, states->new_bs->open_flags & ~BDRV_O_RDWR, |
820 |
NULL);
|
821 |
} |
822 |
|
823 |
/* success */
|
824 |
goto exit;
|
825 |
|
826 |
delete_and_fail:
|
827 |
/*
|
828 |
* failure, and it is all-or-none; abandon each new bs, and keep using
|
829 |
* the original bs for all images
|
830 |
*/
|
831 |
QSIMPLEQ_FOREACH(states, &snap_bdrv_states, entry) { |
832 |
if (states->new_bs) {
|
833 |
bdrv_delete(states->new_bs); |
834 |
} |
835 |
} |
836 |
exit:
|
837 |
QSIMPLEQ_FOREACH_SAFE(states, &snap_bdrv_states, entry, next) { |
838 |
g_free(states); |
839 |
} |
840 |
} |
841 |
|
842 |
|
843 |
static void eject_device(BlockDriverState *bs, int force, Error **errp) |
844 |
{ |
845 |
if (bdrv_in_use(bs)) {
|
846 |
error_set(errp, QERR_DEVICE_IN_USE, bdrv_get_device_name(bs)); |
847 |
return;
|
848 |
} |
849 |
if (!bdrv_dev_has_removable_media(bs)) {
|
850 |
error_set(errp, QERR_DEVICE_NOT_REMOVABLE, bdrv_get_device_name(bs)); |
851 |
return;
|
852 |
} |
853 |
|
854 |
if (bdrv_dev_is_medium_locked(bs) && !bdrv_dev_is_tray_open(bs)) {
|
855 |
bdrv_dev_eject_request(bs, force); |
856 |
if (!force) {
|
857 |
error_set(errp, QERR_DEVICE_LOCKED, bdrv_get_device_name(bs)); |
858 |
return;
|
859 |
} |
860 |
} |
861 |
|
862 |
bdrv_close(bs); |
863 |
} |
864 |
|
865 |
void qmp_eject(const char *device, bool has_force, bool force, Error **errp) |
866 |
{ |
867 |
BlockDriverState *bs; |
868 |
|
869 |
bs = bdrv_find(device); |
870 |
if (!bs) {
|
871 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
872 |
return;
|
873 |
} |
874 |
|
875 |
eject_device(bs, force, errp); |
876 |
} |
877 |
|
878 |
void qmp_block_passwd(const char *device, const char *password, Error **errp) |
879 |
{ |
880 |
BlockDriverState *bs; |
881 |
int err;
|
882 |
|
883 |
bs = bdrv_find(device); |
884 |
if (!bs) {
|
885 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
886 |
return;
|
887 |
} |
888 |
|
889 |
err = bdrv_set_key(bs, password); |
890 |
if (err == -EINVAL) {
|
891 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
892 |
return;
|
893 |
} else if (err < 0) { |
894 |
error_set(errp, QERR_INVALID_PASSWORD); |
895 |
return;
|
896 |
} |
897 |
} |
898 |
|
899 |
static void qmp_bdrv_open_encrypted(BlockDriverState *bs, const char *filename, |
900 |
int bdrv_flags, BlockDriver *drv,
|
901 |
const char *password, Error **errp) |
902 |
{ |
903 |
if (bdrv_open(bs, filename, bdrv_flags, drv) < 0) { |
904 |
error_set(errp, QERR_OPEN_FILE_FAILED, filename); |
905 |
return;
|
906 |
} |
907 |
|
908 |
if (bdrv_key_required(bs)) {
|
909 |
if (password) {
|
910 |
if (bdrv_set_key(bs, password) < 0) { |
911 |
error_set(errp, QERR_INVALID_PASSWORD); |
912 |
} |
913 |
} else {
|
914 |
error_set(errp, QERR_DEVICE_ENCRYPTED, bdrv_get_device_name(bs), |
915 |
bdrv_get_encrypted_filename(bs)); |
916 |
} |
917 |
} else if (password) { |
918 |
error_set(errp, QERR_DEVICE_NOT_ENCRYPTED, bdrv_get_device_name(bs)); |
919 |
} |
920 |
} |
921 |
|
922 |
void qmp_change_blockdev(const char *device, const char *filename, |
923 |
bool has_format, const char *format, Error **errp) |
924 |
{ |
925 |
BlockDriverState *bs; |
926 |
BlockDriver *drv = NULL;
|
927 |
int bdrv_flags;
|
928 |
Error *err = NULL;
|
929 |
|
930 |
bs = bdrv_find(device); |
931 |
if (!bs) {
|
932 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
933 |
return;
|
934 |
} |
935 |
|
936 |
if (format) {
|
937 |
drv = bdrv_find_whitelisted_format(format); |
938 |
if (!drv) {
|
939 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
940 |
return;
|
941 |
} |
942 |
} |
943 |
|
944 |
eject_device(bs, 0, &err);
|
945 |
if (error_is_set(&err)) {
|
946 |
error_propagate(errp, err); |
947 |
return;
|
948 |
} |
949 |
|
950 |
bdrv_flags = bdrv_is_read_only(bs) ? 0 : BDRV_O_RDWR;
|
951 |
bdrv_flags |= bdrv_is_snapshot(bs) ? BDRV_O_SNAPSHOT : 0;
|
952 |
|
953 |
qmp_bdrv_open_encrypted(bs, filename, bdrv_flags, drv, NULL, errp);
|
954 |
} |
955 |
|
956 |
/* throttling disk I/O limits */
|
957 |
void qmp_block_set_io_throttle(const char *device, int64_t bps, int64_t bps_rd, |
958 |
int64_t bps_wr, int64_t iops, int64_t iops_rd, |
959 |
int64_t iops_wr, Error **errp) |
960 |
{ |
961 |
BlockIOLimit io_limits; |
962 |
BlockDriverState *bs; |
963 |
|
964 |
bs = bdrv_find(device); |
965 |
if (!bs) {
|
966 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
967 |
return;
|
968 |
} |
969 |
|
970 |
io_limits.bps[BLOCK_IO_LIMIT_TOTAL] = bps; |
971 |
io_limits.bps[BLOCK_IO_LIMIT_READ] = bps_rd; |
972 |
io_limits.bps[BLOCK_IO_LIMIT_WRITE] = bps_wr; |
973 |
io_limits.iops[BLOCK_IO_LIMIT_TOTAL]= iops; |
974 |
io_limits.iops[BLOCK_IO_LIMIT_READ] = iops_rd; |
975 |
io_limits.iops[BLOCK_IO_LIMIT_WRITE]= iops_wr; |
976 |
|
977 |
if (!do_check_io_limits(&io_limits)) {
|
978 |
error_set(errp, QERR_INVALID_PARAMETER_COMBINATION); |
979 |
return;
|
980 |
} |
981 |
|
982 |
bs->io_limits = io_limits; |
983 |
bs->slice_time = BLOCK_IO_SLICE_TIME; |
984 |
|
985 |
if (!bs->io_limits_enabled && bdrv_io_limits_enabled(bs)) {
|
986 |
bdrv_io_limits_enable(bs); |
987 |
} else if (bs->io_limits_enabled && !bdrv_io_limits_enabled(bs)) { |
988 |
bdrv_io_limits_disable(bs); |
989 |
} else {
|
990 |
if (bs->block_timer) {
|
991 |
qemu_mod_timer(bs->block_timer, qemu_get_clock_ns(vm_clock)); |
992 |
} |
993 |
} |
994 |
} |
995 |
|
996 |
int do_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) |
997 |
{ |
998 |
const char *id = qdict_get_str(qdict, "id"); |
999 |
BlockDriverState *bs; |
1000 |
|
1001 |
bs = bdrv_find(id); |
1002 |
if (!bs) {
|
1003 |
qerror_report(QERR_DEVICE_NOT_FOUND, id); |
1004 |
return -1; |
1005 |
} |
1006 |
if (bdrv_in_use(bs)) {
|
1007 |
qerror_report(QERR_DEVICE_IN_USE, id); |
1008 |
return -1; |
1009 |
} |
1010 |
|
1011 |
/* quiesce block driver; prevent further io */
|
1012 |
bdrv_drain_all(); |
1013 |
bdrv_flush(bs); |
1014 |
bdrv_close(bs); |
1015 |
|
1016 |
/* if we have a device attached to this BlockDriverState
|
1017 |
* then we need to make the drive anonymous until the device
|
1018 |
* can be removed. If this is a drive with no device backing
|
1019 |
* then we can just get rid of the block driver state right here.
|
1020 |
*/
|
1021 |
if (bdrv_get_attached_dev(bs)) {
|
1022 |
bdrv_make_anon(bs); |
1023 |
} else {
|
1024 |
drive_uninit(drive_get_by_blockdev(bs)); |
1025 |
} |
1026 |
|
1027 |
return 0; |
1028 |
} |
1029 |
|
1030 |
void qmp_block_resize(const char *device, int64_t size, Error **errp) |
1031 |
{ |
1032 |
BlockDriverState *bs; |
1033 |
|
1034 |
bs = bdrv_find(device); |
1035 |
if (!bs) {
|
1036 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1037 |
return;
|
1038 |
} |
1039 |
|
1040 |
if (size < 0) { |
1041 |
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "size", "a >0 size"); |
1042 |
return;
|
1043 |
} |
1044 |
|
1045 |
switch (bdrv_truncate(bs, size)) {
|
1046 |
case 0: |
1047 |
break;
|
1048 |
case -ENOMEDIUM:
|
1049 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1050 |
break;
|
1051 |
case -ENOTSUP:
|
1052 |
error_set(errp, QERR_UNSUPPORTED); |
1053 |
break;
|
1054 |
case -EACCES:
|
1055 |
error_set(errp, QERR_DEVICE_IS_READ_ONLY, device); |
1056 |
break;
|
1057 |
case -EBUSY:
|
1058 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1059 |
break;
|
1060 |
default:
|
1061 |
error_set(errp, QERR_UNDEFINED_ERROR); |
1062 |
break;
|
1063 |
} |
1064 |
} |
1065 |
|
1066 |
static void block_job_cb(void *opaque, int ret) |
1067 |
{ |
1068 |
BlockDriverState *bs = opaque; |
1069 |
QObject *obj; |
1070 |
|
1071 |
trace_block_job_cb(bs, bs->job, ret); |
1072 |
|
1073 |
assert(bs->job); |
1074 |
obj = qobject_from_block_job(bs->job); |
1075 |
if (ret < 0) { |
1076 |
QDict *dict = qobject_to_qdict(obj); |
1077 |
qdict_put(dict, "error", qstring_from_str(strerror(-ret)));
|
1078 |
} |
1079 |
|
1080 |
if (block_job_is_cancelled(bs->job)) {
|
1081 |
monitor_protocol_event(QEVENT_BLOCK_JOB_CANCELLED, obj); |
1082 |
} else {
|
1083 |
monitor_protocol_event(QEVENT_BLOCK_JOB_COMPLETED, obj); |
1084 |
} |
1085 |
qobject_decref(obj); |
1086 |
|
1087 |
drive_put_ref_bh_schedule(drive_get_by_blockdev(bs)); |
1088 |
} |
1089 |
|
1090 |
void qmp_block_stream(const char *device, bool has_base, |
1091 |
const char *base, bool has_speed, int64_t speed, |
1092 |
bool has_on_error, BlockdevOnError on_error,
|
1093 |
Error **errp) |
1094 |
{ |
1095 |
BlockDriverState *bs; |
1096 |
BlockDriverState *base_bs = NULL;
|
1097 |
Error *local_err = NULL;
|
1098 |
|
1099 |
if (!has_on_error) {
|
1100 |
on_error = BLOCKDEV_ON_ERROR_REPORT; |
1101 |
} |
1102 |
|
1103 |
bs = bdrv_find(device); |
1104 |
if (!bs) {
|
1105 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1106 |
return;
|
1107 |
} |
1108 |
|
1109 |
if (base) {
|
1110 |
base_bs = bdrv_find_backing_image(bs, base); |
1111 |
if (base_bs == NULL) { |
1112 |
error_set(errp, QERR_BASE_NOT_FOUND, base); |
1113 |
return;
|
1114 |
} |
1115 |
} |
1116 |
|
1117 |
stream_start(bs, base_bs, base, has_speed ? speed : 0,
|
1118 |
on_error, block_job_cb, bs, &local_err); |
1119 |
if (error_is_set(&local_err)) {
|
1120 |
error_propagate(errp, local_err); |
1121 |
return;
|
1122 |
} |
1123 |
|
1124 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1125 |
* underneath us.
|
1126 |
*/
|
1127 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1128 |
|
1129 |
trace_qmp_block_stream(bs, bs->job); |
1130 |
} |
1131 |
|
1132 |
void qmp_block_commit(const char *device, |
1133 |
bool has_base, const char *base, const char *top, |
1134 |
bool has_speed, int64_t speed,
|
1135 |
Error **errp) |
1136 |
{ |
1137 |
BlockDriverState *bs; |
1138 |
BlockDriverState *base_bs, *top_bs; |
1139 |
Error *local_err = NULL;
|
1140 |
/* This will be part of the QMP command, if/when the
|
1141 |
* BlockdevOnError change for blkmirror makes it in
|
1142 |
*/
|
1143 |
BlockdevOnError on_error = BLOCKDEV_ON_ERROR_REPORT; |
1144 |
|
1145 |
/* drain all i/o before commits */
|
1146 |
bdrv_drain_all(); |
1147 |
|
1148 |
bs = bdrv_find(device); |
1149 |
if (!bs) {
|
1150 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1151 |
return;
|
1152 |
} |
1153 |
|
1154 |
/* default top_bs is the active layer */
|
1155 |
top_bs = bs; |
1156 |
|
1157 |
if (top) {
|
1158 |
if (strcmp(bs->filename, top) != 0) { |
1159 |
top_bs = bdrv_find_backing_image(bs, top); |
1160 |
} |
1161 |
} |
1162 |
|
1163 |
if (top_bs == NULL) { |
1164 |
error_setg(errp, "Top image file %s not found", top ? top : "NULL"); |
1165 |
return;
|
1166 |
} |
1167 |
|
1168 |
if (has_base && base) {
|
1169 |
base_bs = bdrv_find_backing_image(top_bs, base); |
1170 |
} else {
|
1171 |
base_bs = bdrv_find_base(top_bs); |
1172 |
} |
1173 |
|
1174 |
if (base_bs == NULL) { |
1175 |
error_set(errp, QERR_BASE_NOT_FOUND, base ? base : "NULL");
|
1176 |
return;
|
1177 |
} |
1178 |
|
1179 |
commit_start(bs, base_bs, top_bs, speed, on_error, block_job_cb, bs, |
1180 |
&local_err); |
1181 |
if (local_err != NULL) { |
1182 |
error_propagate(errp, local_err); |
1183 |
return;
|
1184 |
} |
1185 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1186 |
* underneath us.
|
1187 |
*/
|
1188 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1189 |
} |
1190 |
|
1191 |
void qmp_drive_mirror(const char *device, const char *target, |
1192 |
bool has_format, const char *format, |
1193 |
enum MirrorSyncMode sync,
|
1194 |
bool has_mode, enum NewImageMode mode, |
1195 |
bool has_speed, int64_t speed,
|
1196 |
bool has_on_source_error, BlockdevOnError on_source_error,
|
1197 |
bool has_on_target_error, BlockdevOnError on_target_error,
|
1198 |
Error **errp) |
1199 |
{ |
1200 |
BlockDriverInfo bdi; |
1201 |
BlockDriverState *bs; |
1202 |
BlockDriverState *source, *target_bs; |
1203 |
BlockDriver *proto_drv; |
1204 |
BlockDriver *drv = NULL;
|
1205 |
Error *local_err = NULL;
|
1206 |
int flags;
|
1207 |
uint64_t size; |
1208 |
int ret;
|
1209 |
|
1210 |
if (!has_speed) {
|
1211 |
speed = 0;
|
1212 |
} |
1213 |
if (!has_on_source_error) {
|
1214 |
on_source_error = BLOCKDEV_ON_ERROR_REPORT; |
1215 |
} |
1216 |
if (!has_on_target_error) {
|
1217 |
on_target_error = BLOCKDEV_ON_ERROR_REPORT; |
1218 |
} |
1219 |
if (!has_mode) {
|
1220 |
mode = NEW_IMAGE_MODE_ABSOLUTE_PATHS; |
1221 |
} |
1222 |
|
1223 |
bs = bdrv_find(device); |
1224 |
if (!bs) {
|
1225 |
error_set(errp, QERR_DEVICE_NOT_FOUND, device); |
1226 |
return;
|
1227 |
} |
1228 |
|
1229 |
if (!bdrv_is_inserted(bs)) {
|
1230 |
error_set(errp, QERR_DEVICE_HAS_NO_MEDIUM, device); |
1231 |
return;
|
1232 |
} |
1233 |
|
1234 |
if (!has_format) {
|
1235 |
format = mode == NEW_IMAGE_MODE_EXISTING ? NULL : bs->drv->format_name;
|
1236 |
} |
1237 |
if (format) {
|
1238 |
drv = bdrv_find_format(format); |
1239 |
if (!drv) {
|
1240 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1241 |
return;
|
1242 |
} |
1243 |
} |
1244 |
|
1245 |
if (bdrv_in_use(bs)) {
|
1246 |
error_set(errp, QERR_DEVICE_IN_USE, device); |
1247 |
return;
|
1248 |
} |
1249 |
|
1250 |
flags = bs->open_flags | BDRV_O_RDWR; |
1251 |
source = bs->backing_hd; |
1252 |
if (!source && sync == MIRROR_SYNC_MODE_TOP) {
|
1253 |
sync = MIRROR_SYNC_MODE_FULL; |
1254 |
} |
1255 |
|
1256 |
proto_drv = bdrv_find_protocol(target); |
1257 |
if (!proto_drv) {
|
1258 |
error_set(errp, QERR_INVALID_BLOCK_FORMAT, format); |
1259 |
return;
|
1260 |
} |
1261 |
|
1262 |
if (sync == MIRROR_SYNC_MODE_FULL && mode != NEW_IMAGE_MODE_EXISTING) {
|
1263 |
/* create new image w/o backing file */
|
1264 |
assert(format && drv); |
1265 |
bdrv_get_geometry(bs, &size); |
1266 |
size *= 512;
|
1267 |
bdrv_img_create(target, format, |
1268 |
NULL, NULL, NULL, size, flags, &local_err); |
1269 |
} else {
|
1270 |
switch (mode) {
|
1271 |
case NEW_IMAGE_MODE_EXISTING:
|
1272 |
ret = 0;
|
1273 |
break;
|
1274 |
case NEW_IMAGE_MODE_ABSOLUTE_PATHS:
|
1275 |
/* create new image with backing file */
|
1276 |
bdrv_img_create(target, format, |
1277 |
source->filename, |
1278 |
source->drv->format_name, |
1279 |
NULL, -1, flags, &local_err); |
1280 |
break;
|
1281 |
default:
|
1282 |
abort(); |
1283 |
} |
1284 |
} |
1285 |
|
1286 |
if (error_is_set(&local_err)) {
|
1287 |
error_propagate(errp, local_err); |
1288 |
return;
|
1289 |
} |
1290 |
|
1291 |
target_bs = bdrv_new("");
|
1292 |
ret = bdrv_open(target_bs, target, flags | BDRV_O_NO_BACKING, drv); |
1293 |
|
1294 |
if (ret < 0) { |
1295 |
bdrv_delete(target_bs); |
1296 |
error_set(errp, QERR_OPEN_FILE_FAILED, target); |
1297 |
return;
|
1298 |
} |
1299 |
|
1300 |
/* We need a backing file if we will copy parts of a cluster. */
|
1301 |
if (bdrv_get_info(target_bs, &bdi) >= 0 && bdi.cluster_size != 0 && |
1302 |
bdi.cluster_size >= BDRV_SECTORS_PER_DIRTY_CHUNK * 512) {
|
1303 |
ret = bdrv_open_backing_file(target_bs); |
1304 |
if (ret < 0) { |
1305 |
bdrv_delete(target_bs); |
1306 |
error_set(errp, QERR_OPEN_FILE_FAILED, target); |
1307 |
return;
|
1308 |
} |
1309 |
} |
1310 |
|
1311 |
mirror_start(bs, target_bs, speed, sync, on_source_error, on_target_error, |
1312 |
block_job_cb, bs, &local_err); |
1313 |
if (local_err != NULL) { |
1314 |
bdrv_delete(target_bs); |
1315 |
error_propagate(errp, local_err); |
1316 |
return;
|
1317 |
} |
1318 |
|
1319 |
/* Grab a reference so hotplug does not delete the BlockDriverState from
|
1320 |
* underneath us.
|
1321 |
*/
|
1322 |
drive_get_ref(drive_get_by_blockdev(bs)); |
1323 |
} |
1324 |
|
1325 |
static BlockJob *find_block_job(const char *device) |
1326 |
{ |
1327 |
BlockDriverState *bs; |
1328 |
|
1329 |
bs = bdrv_find(device); |
1330 |
if (!bs || !bs->job) {
|
1331 |
return NULL; |
1332 |
} |
1333 |
return bs->job;
|
1334 |
} |
1335 |
|
1336 |
void qmp_block_job_set_speed(const char *device, int64_t speed, Error **errp) |
1337 |
{ |
1338 |
BlockJob *job = find_block_job(device); |
1339 |
|
1340 |
if (!job) {
|
1341 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1342 |
return;
|
1343 |
} |
1344 |
|
1345 |
block_job_set_speed(job, speed, errp); |
1346 |
} |
1347 |
|
1348 |
void qmp_block_job_cancel(const char *device, |
1349 |
bool has_force, bool force, Error **errp) |
1350 |
{ |
1351 |
BlockJob *job = find_block_job(device); |
1352 |
|
1353 |
if (!has_force) {
|
1354 |
force = false;
|
1355 |
} |
1356 |
|
1357 |
if (!job) {
|
1358 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1359 |
return;
|
1360 |
} |
1361 |
if (job->paused && !force) {
|
1362 |
error_set(errp, QERR_BLOCK_JOB_PAUSED, device); |
1363 |
return;
|
1364 |
} |
1365 |
|
1366 |
trace_qmp_block_job_cancel(job); |
1367 |
block_job_cancel(job); |
1368 |
} |
1369 |
|
1370 |
void qmp_block_job_pause(const char *device, Error **errp) |
1371 |
{ |
1372 |
BlockJob *job = find_block_job(device); |
1373 |
|
1374 |
if (!job) {
|
1375 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1376 |
return;
|
1377 |
} |
1378 |
|
1379 |
trace_qmp_block_job_pause(job); |
1380 |
block_job_pause(job); |
1381 |
} |
1382 |
|
1383 |
void qmp_block_job_resume(const char *device, Error **errp) |
1384 |
{ |
1385 |
BlockJob *job = find_block_job(device); |
1386 |
|
1387 |
if (!job) {
|
1388 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1389 |
return;
|
1390 |
} |
1391 |
|
1392 |
trace_qmp_block_job_resume(job); |
1393 |
block_job_resume(job); |
1394 |
} |
1395 |
|
1396 |
void qmp_block_job_complete(const char *device, Error **errp) |
1397 |
{ |
1398 |
BlockJob *job = find_block_job(device); |
1399 |
|
1400 |
if (!job) {
|
1401 |
error_set(errp, QERR_BLOCK_JOB_NOT_ACTIVE, device); |
1402 |
return;
|
1403 |
} |
1404 |
|
1405 |
trace_qmp_block_job_complete(job); |
1406 |
block_job_complete(job, errp); |
1407 |
} |
1408 |
|
1409 |
static void do_qmp_query_block_jobs_one(void *opaque, BlockDriverState *bs) |
1410 |
{ |
1411 |
BlockJobInfoList **prev = opaque; |
1412 |
BlockJob *job = bs->job; |
1413 |
|
1414 |
if (job) {
|
1415 |
BlockJobInfoList *elem = g_new0(BlockJobInfoList, 1);
|
1416 |
elem->value = block_job_query(bs->job); |
1417 |
(*prev)->next = elem; |
1418 |
*prev = elem; |
1419 |
} |
1420 |
} |
1421 |
|
1422 |
BlockJobInfoList *qmp_query_block_jobs(Error **errp) |
1423 |
{ |
1424 |
/* Dummy is a fake list element for holding the head pointer */
|
1425 |
BlockJobInfoList dummy = {}; |
1426 |
BlockJobInfoList *prev = &dummy; |
1427 |
bdrv_iterate(do_qmp_query_block_jobs_one, &prev); |
1428 |
return dummy.next;
|
1429 |
} |