include/block/snapshot.h

   1 /*
   2  * Block layer snapshot related functions
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #ifndef SNAPSHOT_H
  26 #define SNAPSHOT_H
  27
  28 #include "qemu-common.h"
  29
  30 typedef struct QEMUSnapshotInfo {
  31     char id_str[128]; /* unique snapshot id */
  32     /* the following fields are informative. They are not needed for
  33        the consistency of the snapshot */
  34     char name[256]; /* user chosen name */
  35     uint64_t vm_state_size; /* VM state info size */
  36     uint32_t date_sec; /* UTC date of the snapshot */
  37     uint32_t date_nsec;
  38     uint64_t vm_clock_nsec; /* VM clock relative to boot */
  39 } QEMUSnapshotInfo;
  40
  41 int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
  42                        const char *name);
  43 int bdrv_can_snapshot(BlockDriverState *bs);
  44 int bdrv_snapshot_create(BlockDriverState *bs,
  45                          QEMUSnapshotInfo *sn_info);
  46 int bdrv_snapshot_goto(BlockDriverState *bs,
  47                        const char *snapshot_id);
  48 int bdrv_snapshot_delete(BlockDriverState *bs, const char *snapshot_id);
  49 int bdrv_snapshot_list(BlockDriverState *bs,
  50                        QEMUSnapshotInfo **psn_info);
  51 int bdrv_snapshot_load_tmp(BlockDriverState *bs,
  52                            const char *snapshot_name);
  53 #endif