efc6587313
To preserve CPR state across exec, create a QEMUFile based on a memfd, and keep the memfd open across exec. Save the value of the memfd in an environment variable so post-exec QEMU can find it. These new functions are called in a subsequent patch. Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Link: https://lore.kernel.org/r/1759332851-370353-6-git-send-email-steven.sistare@oracle.com [peterx: fix build for Windows] Signed-off-by: Peter Xu <peterx@redhat.com>
61 lines
1.8 KiB
C
61 lines
1.8 KiB
C
/*
|
|
* Copyright (c) 2021, 2024 Oracle and/or its affiliates.
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*/
|
|
|
|
#ifndef MIGRATION_CPR_H
|
|
#define MIGRATION_CPR_H
|
|
|
|
#include "qapi/qapi-types-migration.h"
|
|
#include "qemu/queue.h"
|
|
|
|
#define MIG_MODE_NONE -1
|
|
|
|
#define QEMU_CPR_FILE_MAGIC 0x51435052
|
|
#define QEMU_CPR_FILE_VERSION 0x00000001
|
|
#define CPR_STATE "CprState"
|
|
|
|
typedef QLIST_HEAD(CprFdList, CprFd) CprFdList;
|
|
typedef QLIST_HEAD(CprVFIODeviceList, CprVFIODevice) CprVFIODeviceList;
|
|
|
|
typedef struct CprState {
|
|
CprFdList fds;
|
|
CprVFIODeviceList vfio_devices;
|
|
} CprState;
|
|
|
|
extern CprState cpr_state;
|
|
|
|
void cpr_save_fd(const char *name, int id, int fd);
|
|
void cpr_delete_fd(const char *name, int id);
|
|
int cpr_find_fd(const char *name, int id);
|
|
void cpr_resave_fd(const char *name, int id, int fd);
|
|
int cpr_open_fd(const char *path, int flags, const char *name, int id,
|
|
Error **errp);
|
|
|
|
typedef bool (*cpr_walk_fd_cb)(int fd);
|
|
bool cpr_walk_fd(cpr_walk_fd_cb cb);
|
|
|
|
MigMode cpr_get_incoming_mode(void);
|
|
void cpr_set_incoming_mode(MigMode mode);
|
|
bool cpr_is_incoming(void);
|
|
|
|
int cpr_state_save(MigrationChannel *channel, Error **errp);
|
|
int cpr_state_load(MigrationChannel *channel, Error **errp);
|
|
void cpr_state_close(void);
|
|
struct QIOChannel *cpr_state_ioc(void);
|
|
|
|
bool cpr_incoming_needed(void *opaque);
|
|
int cpr_get_fd_param(const char *name, const char *fdname, int index,
|
|
Error **errp);
|
|
|
|
QEMUFile *cpr_transfer_output(MigrationChannel *channel, Error **errp);
|
|
QEMUFile *cpr_transfer_input(MigrationChannel *channel, Error **errp);
|
|
|
|
QEMUFile *cpr_exec_output(Error **errp);
|
|
QEMUFile *cpr_exec_input(Error **errp);
|
|
void cpr_exec_persist_state(QEMUFile *f);
|
|
bool cpr_exec_has_state(void);
|
|
void cpr_exec_unpersist_state(void);
|
|
#endif
|