Differential D19495 Diff 69728 usr.sbin/bhyve/snapshot.h

Changeset View

Standalone View

usr.sbin/bhyve/snapshot.h

This file was added.

				/*-
				* 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
				jhbAuthorUnsubmitted Done Inline Actions Why does this need packed? If it isn't stored in a file, we should let the compiler choose the optimal layout. jhb: Why does this need packed? If it isn't stored in a file, we should let the compiler choose the…
				* 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>

				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;
				};

				struct checkpoint_thread_info {
				struct vmctx *ctx;
				int socket_fd;
				struct sockaddr_un *addr;
				} checkpoint_info;

				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