mirror of
https://github.com/qemu/qemu.git
synced 2025-10-31 04:06:46 +00:00
3d3e9b1f66
Currently bdrv_all_find_snapshot() will return 0 if it finds a snapshot, -1 if an error occurs, or if it fails to find a snapshot. New callers to be added want to distinguish between the error scenario and failing to find a snapshot. Rename it to bdrv_all_has_snapshot and make it return -1 on error, 0 if no snapshot is found and 1 if snapshot is found. Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20210204124834.774401-7-berrange@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
103 lines
4.4 KiB
C
103 lines
4.4 KiB
C
/*
|
|
* Block layer snapshot related functions
|
|
*
|
|
* Copyright (c) 2003-2008 Fabrice Bellard
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef SNAPSHOT_H
|
|
#define SNAPSHOT_H
|
|
|
|
#include "qapi/qapi-builtin-types.h"
|
|
|
|
#define SNAPSHOT_OPT_BASE "snapshot."
|
|
#define SNAPSHOT_OPT_ID "snapshot.id"
|
|
#define SNAPSHOT_OPT_NAME "snapshot.name"
|
|
|
|
extern QemuOptsList internal_snapshot_opts;
|
|
|
|
typedef struct QEMUSnapshotInfo {
|
|
char id_str[128]; /* unique snapshot id */
|
|
/* the following fields are informative. They are not needed for
|
|
the consistency of the snapshot */
|
|
char name[256]; /* user chosen name */
|
|
uint64_t vm_state_size; /* VM state info size */
|
|
uint32_t date_sec; /* UTC date of the snapshot */
|
|
uint32_t date_nsec;
|
|
uint64_t vm_clock_nsec; /* VM clock relative to boot */
|
|
uint64_t icount; /* record/replay step */
|
|
} QEMUSnapshotInfo;
|
|
|
|
int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
|
|
const char *name);
|
|
bool bdrv_snapshot_find_by_id_and_name(BlockDriverState *bs,
|
|
const char *id,
|
|
const char *name,
|
|
QEMUSnapshotInfo *sn_info,
|
|
Error **errp);
|
|
int bdrv_can_snapshot(BlockDriverState *bs);
|
|
int bdrv_snapshot_create(BlockDriverState *bs,
|
|
QEMUSnapshotInfo *sn_info);
|
|
int bdrv_snapshot_goto(BlockDriverState *bs,
|
|
const char *snapshot_id,
|
|
Error **errp);
|
|
int bdrv_snapshot_delete(BlockDriverState *bs,
|
|
const char *snapshot_id,
|
|
const char *name,
|
|
Error **errp);
|
|
int bdrv_snapshot_list(BlockDriverState *bs,
|
|
QEMUSnapshotInfo **psn_info);
|
|
int bdrv_snapshot_load_tmp(BlockDriverState *bs,
|
|
const char *snapshot_id,
|
|
const char *name,
|
|
Error **errp);
|
|
int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
|
|
const char *id_or_name,
|
|
Error **errp);
|
|
|
|
|
|
/* Group operations. All block drivers are involved.
|
|
* These functions will properly handle dataplane (take aio_context_acquire
|
|
* when appropriate for appropriate block drivers */
|
|
|
|
bool bdrv_all_can_snapshot(bool has_devices, strList *devices,
|
|
Error **errp);
|
|
int bdrv_all_delete_snapshot(const char *name,
|
|
bool has_devices, strList *devices,
|
|
Error **errp);
|
|
int bdrv_all_goto_snapshot(const char *name,
|
|
bool has_devices, strList *devices,
|
|
Error **errp);
|
|
int bdrv_all_has_snapshot(const char *name,
|
|
bool has_devices, strList *devices,
|
|
Error **errp);
|
|
int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
|
|
BlockDriverState *vm_state_bs,
|
|
uint64_t vm_state_size,
|
|
bool has_devices,
|
|
strList *devices,
|
|
Error **errp);
|
|
|
|
BlockDriverState *bdrv_all_find_vmstate_bs(const char *vmstate_bs,
|
|
bool has_devices, strList *devices,
|
|
Error **errp);
|
|
|
|
#endif
|