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https://github.com/checkpoint-restore/criu.git
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d36c4058bc
So it won't depend on the order in declaration. Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
131 lines
4.2 KiB
C
131 lines
4.2 KiB
C
/*
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* This file defines types and macros for CRIU plugins.
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* Copyright (C) 2013-2014 Parallels, Inc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __CRIU_PLUGIN_H__
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#define __CRIU_PLUGIN_H__
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#include <limits.h>
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#include <stdbool.h>
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#define CRIU_PLUGIN_GEN_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
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#define CRIU_PLUGIN_VERSION_MAJOR 0
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#define CRIU_PLUGIN_VERSION_MINOR 2
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#define CRIU_PLUGIN_VERSION_SUBLEVEL 0
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#define CRIU_PLUGIN_VERSION_OLD CRIU_PLUGIN_GEN_VERSION(0,1,0)
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#define CRIU_PLUGIN_VERSION \
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CRIU_PLUGIN_GEN_VERSION(CRIU_PLUGIN_VERSION_MAJOR, \
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CRIU_PLUGIN_VERSION_MINOR, \
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CRIU_PLUGIN_VERSION_SUBLEVEL)
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/*
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* Plugin hook points and their arguments in hooks.
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*/
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enum {
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CR_PLUGIN_HOOK__DUMP_UNIX_SK = 0,
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CR_PLUGIN_HOOK__RESTORE_UNIX_SK = 1,
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CR_PLUGIN_HOOK__DUMP_EXT_FILE = 2,
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CR_PLUGIN_HOOK__RESTORE_EXT_FILE = 3,
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CR_PLUGIN_HOOK__DUMP_EXT_MOUNT = 4,
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CR_PLUGIN_HOOK__RESTORE_EXT_MOUNT = 5,
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CR_PLUGIN_HOOK__DUMP_EXT_LINK = 6,
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CR_PLUGIN_HOOK__MAX
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};
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#define DECLARE_PLUGIN_HOOK_ARGS(__hook, ...) \
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typedef int (__hook ##_t)(__VA_ARGS__)
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DECLARE_PLUGIN_HOOK_ARGS(CR_PLUGIN_HOOK__DUMP_UNIX_SK, int fd, int id);
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DECLARE_PLUGIN_HOOK_ARGS(CR_PLUGIN_HOOK__RESTORE_UNIX_SK, int id);
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DECLARE_PLUGIN_HOOK_ARGS(CR_PLUGIN_HOOK__DUMP_EXT_FILE, int fd, int id);
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DECLARE_PLUGIN_HOOK_ARGS(CR_PLUGIN_HOOK__RESTORE_EXT_FILE, int id);
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DECLARE_PLUGIN_HOOK_ARGS(CR_PLUGIN_HOOK__DUMP_EXT_MOUNT, char *mountpoint, int id);
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DECLARE_PLUGIN_HOOK_ARGS(CR_PLUGIN_HOOK__RESTORE_EXT_MOUNT, int id, char *mountpoint, char *old_root, int *is_file);
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DECLARE_PLUGIN_HOOK_ARGS(CR_PLUGIN_HOOK__DUMP_EXT_LINK, int index, int type, char *kind);
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enum {
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CR_PLUGIN_STAGE__DUMP,
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CR_PLUGIN_STAGE__RESTORE,
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CR_PLUGIN_STAGE_MAX
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};
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/*
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* Plugin descriptor.
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*/
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typedef struct {
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const char *name;
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int (*init)(int stage);
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void (*exit)(int stage, int ret);
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unsigned int version;
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unsigned int max_hooks;
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void *hooks[CR_PLUGIN_HOOK__MAX];
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} cr_plugin_desc_t;
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extern cr_plugin_desc_t CR_PLUGIN_DESC;
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#define CR_PLUGIN_REGISTER(___name, ___init, ___exit) \
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cr_plugin_desc_t CR_PLUGIN_DESC = { \
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.name = ___name, \
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.init = ___init, \
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.exit = ___exit, \
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.version = CRIU_PLUGIN_VERSION, \
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.max_hooks = CR_PLUGIN_HOOK__MAX, \
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};
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static inline int cr_plugin_dummy_init(int stage) { return 0; }
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static inline void cr_plugin_dummy_exit(int stage, int ret) { }
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#define CR_PLUGIN_REGISTER_DUMMY(___name) \
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cr_plugin_desc_t CR_PLUGIN_DESC = { \
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.name = ___name, \
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.init = cr_plugin_dummy_init, \
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.exit = cr_plugin_dummy_exit, \
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.version = CRIU_PLUGIN_VERSION, \
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.max_hooks = CR_PLUGIN_HOOK__MAX, \
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};
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#define CR_PLUGIN_REGISTER_HOOK(__hook, __func) \
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static void __attribute__((constructor)) cr_plugin_register_hook_##__func (void) \
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{ \
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CR_PLUGIN_DESC.hooks[__hook] = (void *)__func; \
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}
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/* Public API */
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extern int criu_get_image_dir(void);
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/*
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* Deprecated, will be removed in next version.
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*/
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typedef int (cr_plugin_init_t)(void);
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typedef void (cr_plugin_fini_t)(void);
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typedef int (cr_plugin_dump_unix_sk_t)(int fd, int id);
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typedef int (cr_plugin_restore_unix_sk_t)(int id);
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typedef int (cr_plugin_dump_file_t)(int fd, int id);
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typedef int (cr_plugin_restore_file_t)(int id);
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typedef int (cr_plugin_dump_ext_mount_t)(char *mountpoint, int id);
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typedef int (cr_plugin_restore_ext_mount_t)(int id, char *mountpoint, char *old_root, int *is_file);
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typedef int (cr_plugin_dump_ext_link_t)(int index, int type, char *kind);
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#endif /* __CRIU_PLUGIN_H__ */
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