a9085f9b55
to create snapshot for all loaded block drivers. The patch also ensures proper locking. Signed-off-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> CC: Kevin Wolf <kwolf@redhat.com> Tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
95 lines
4.1 KiB
C
95 lines
4.1 KiB
C
/*
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* Block layer snapshot related functions
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef SNAPSHOT_H
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#define SNAPSHOT_H
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#include "qemu-common.h"
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#include "qapi/error.h"
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#include "qemu/option.h"
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#define SNAPSHOT_OPT_BASE "snapshot."
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#define SNAPSHOT_OPT_ID "snapshot.id"
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#define SNAPSHOT_OPT_NAME "snapshot.name"
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extern QemuOptsList internal_snapshot_opts;
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typedef struct QEMUSnapshotInfo {
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char id_str[128]; /* unique snapshot id */
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/* the following fields are informative. They are not needed for
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the consistency of the snapshot */
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char name[256]; /* user chosen name */
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uint64_t vm_state_size; /* VM state info size */
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uint32_t date_sec; /* UTC date of the snapshot */
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uint32_t date_nsec;
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uint64_t vm_clock_nsec; /* VM clock relative to boot */
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} QEMUSnapshotInfo;
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int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
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const char *name);
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bool bdrv_snapshot_find_by_id_and_name(BlockDriverState *bs,
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const char *id,
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const char *name,
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QEMUSnapshotInfo *sn_info,
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Error **errp);
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int bdrv_can_snapshot(BlockDriverState *bs);
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int bdrv_snapshot_create(BlockDriverState *bs,
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QEMUSnapshotInfo *sn_info);
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int bdrv_snapshot_goto(BlockDriverState *bs,
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const char *snapshot_id);
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int bdrv_snapshot_delete(BlockDriverState *bs,
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const char *snapshot_id,
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const char *name,
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Error **errp);
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int bdrv_snapshot_delete_by_id_or_name(BlockDriverState *bs,
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const char *id_or_name,
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Error **errp);
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int bdrv_snapshot_list(BlockDriverState *bs,
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QEMUSnapshotInfo **psn_info);
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int bdrv_snapshot_load_tmp(BlockDriverState *bs,
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const char *snapshot_id,
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const char *name,
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Error **errp);
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int bdrv_snapshot_load_tmp_by_id_or_name(BlockDriverState *bs,
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const char *id_or_name,
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Error **errp);
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/* Group operations. All block drivers are involved.
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* These functions will properly handle dataplane (take aio_context_acquire
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* when appropriate for appropriate block drivers */
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bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs);
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int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bsd_bs,
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Error **err);
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int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bsd_bs);
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int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs);
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int bdrv_all_create_snapshot(QEMUSnapshotInfo *sn,
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BlockDriverState *vm_state_bs,
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uint64_t vm_state_size,
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BlockDriverState **first_bad_bs);
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#endif
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