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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2016 Flavius Anton
* Copyright (c) 2016 Mihai Tiganus
* Copyright (c) 2016-2019 Mihai Carabas
* Copyright (c) 2017-2019 Darius Mihai
* Copyright (c) 2017-2019 Elena Mihailescu
* Copyright (c) 2018-2019 Sergiu Weisz
* All rights reserved.
* The bhyve-snapshot feature was developed under sponsorships
* from Matthew Grooms.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _BHYVE_SNAPSHOT_
#define _BHYVE_SNAPSHOT_
#include <machine/vmm_snapshot.h>
#include <libxo/xo.h>
#include <ucl.h>
#define MAX_SNAPSHOT_VMNAME 100
struct vmctx;
struct restore_state {
int kdata_fd;
int vmmem_fd;
void *kdata_map;
size_t kdata_len;
size_t vmmem_len;
struct ucl_parser *meta_parser;
ucl_object_t *meta_root_obj;
};
enum checkpoint_opcodes {
START_CHECKPOINT = 0,
START_SUSPEND = 1,
};
struct checkpoint_op {
unsigned int op;
char snapshot_filename[MAX_SNAPSHOT_VMNAME];
};
struct checkpoint_thread_info {
struct vmctx *ctx;
int socket_fd;
};
typedef int (*vm_snapshot_dev_cb)(struct vm_snapshot_meta *);
typedef int (*vm_pause_dev_cb) (struct vmctx *, const char *);
typedef int (*vm_resume_dev_cb) (struct vmctx *, const char *);
struct vm_snapshot_dev_info {
const char *dev_name; /* device name */
vm_snapshot_dev_cb snapshot_cb; /* callback for device snapshot */
vm_pause_dev_cb pause_cb; /* callback for device pause */
vm_resume_dev_cb resume_cb; /* callback for device resume */
};
struct vm_snapshot_kern_info {
const char *struct_name; /* kernel structure name*/
enum snapshot_req req; /* request type */
};
void destroy_restore_state(struct restore_state *rstate);
const char *lookup_vmname(struct restore_state *rstate);
int lookup_memflags(struct restore_state *rstate);
size_t lookup_memsize(struct restore_state *rstate);
int lookup_guest_ncpus(struct restore_state *rstate);
void checkpoint_cpu_add(int vcpu);
void checkpoint_cpu_resume(int vcpu);
void checkpoint_cpu_suspend(int vcpu);
int restore_vm_mem(struct vmctx *ctx, struct restore_state *rstate);
int vm_restore_kern_structs(struct vmctx *ctx, struct restore_state *rstate);
int vm_restore_user_devs(struct vmctx *ctx, struct restore_state *rstate);
int vm_pause_user_devs(struct vmctx *ctx);
int vm_resume_user_devs(struct vmctx *ctx);
int get_checkpoint_msg(int conn_fd, struct vmctx *ctx);
void *checkpoint_thread(void *param);
int init_checkpoint_thread(struct vmctx *ctx);
int load_restore_file(const char *filename, struct restore_state *rstate);
#endif
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