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Editing: rpc.proto

// SPDX-License-Identifier: MIT

syntax = "proto2";

message criu_page_server_info {
	optional string		address	= 1;
	optional int32		port	= 2;
	optional int32		pid	= 3;
	optional int32		fd	= 4;
}

message criu_veth_pair {
	required string		if_in	= 1;
	required string		if_out	= 2;
};

message ext_mount_map {
	required string		key	= 1;
	required string		val	= 2;
};

message join_namespace {
	required string		ns		= 1;
	required string		ns_file		= 2;
	optional string		extra_opt	= 3;
}

message inherit_fd {
	required string		key	= 1;
	required int32		fd	= 2;
};

message cgroup_root {
	optional string		ctrl	= 1;
	required string		path	= 2;
};

message unix_sk {
	required uint32		inode 	= 1;
};

enum criu_cg_mode {
	IGNORE	= 0;
	CG_NONE	= 1;
	PROPS	= 2;
	SOFT	= 3;
	FULL	= 4;
	STRICT	= 5;
	DEFAULT = 6;
};

enum criu_network_lock_method {
	IPTABLES = 	1;
	NFTABLES = 	2;
	SKIP =  	3;
};

enum criu_pre_dump_mode {
	SPLICE = 	1;
	VM_READ =	2;
};

message criu_opts {
	required int32			images_dir_fd	= 1 [default = -1];
	optional string			images_dir	= 68; /* used only if images_dir_fd == -1 */
	optional int32			pid		= 2; /* if not set on dump, will dump requesting process */

optional bool			leave_running	= 3;
	optional bool			ext_unix_sk	= 4;
	optional bool			tcp_established	= 5;
	optional bool			evasive_devices	= 6;
	optional bool			shell_job	= 7;
	optional bool			file_locks	= 8;
	optional int32			log_level	= 9 [default = 2];
	optional string			log_file	= 10; /* No subdirs are allowed. Consider using work-dir */

optional criu_page_server_info	ps		= 11;

optional bool			notify_scripts	= 12;

optional string			root		= 13;
	optional string			parent_img	= 14;
	optional bool			track_mem	= 15;
	optional bool			auto_dedup	= 16;

optional int32			work_dir_fd	= 17;
	optional bool			link_remap	= 18;
	repeated criu_veth_pair		veths		= 19; /* DEPRECATED, use external instead */

optional uint32			cpu_cap		= 20 [default = 0xffffffff];
	optional bool			force_irmap	= 21;
	repeated string			exec_cmd	= 22;

repeated ext_mount_map		ext_mnt		= 23; /* DEPRECATED, use external instead */
	optional bool			manage_cgroups	= 24; /* backward compatibility */
	repeated cgroup_root		cg_root		= 25;

optional bool			rst_sibling	= 26; /* swrk only */
	repeated inherit_fd		inherit_fd	= 27; /* swrk only */

optional bool			auto_ext_mnt	= 28;
	optional bool			ext_sharing 	= 29;
	optional bool			ext_masters	= 30;

repeated string			skip_mnt	= 31;
	repeated string			enable_fs	= 32;

repeated unix_sk                unix_sk_ino     = 33; /* DEPRECATED, use external instead */

optional criu_cg_mode		manage_cgroups_mode = 34;
	optional uint32			ghost_limit	= 35 [default = 0x100000];
	repeated string			irmap_scan_paths = 36;
	repeated string			external	= 37;
	optional uint32			empty_ns	= 38;
	repeated join_namespace		join_ns		= 39;

optional string			cgroup_props		= 41;
	optional string			cgroup_props_file	= 42;
	repeated string			cgroup_dump_controller	= 43;

optional string			freeze_cgroup		= 44;
	optional uint32			timeout			= 45;
	optional bool			tcp_skip_in_flight	= 46;
	optional bool			weak_sysctls		= 47;
	optional bool			lazy_pages		= 48;
	optional int32			status_fd		= 49;
	optional bool			orphan_pts_master	= 50;
	optional string			config_file		= 51;
	optional bool			tcp_close		= 52;
	optional string			lsm_profile		= 53;
	optional string			tls_cacert		= 54;
	optional string			tls_cacrl		= 55;
	optional string			tls_cert		= 56;
	optional string			tls_key			= 57;
	optional bool			tls			= 58;
	optional bool			tls_no_cn_verify	= 59;
	optional string			cgroup_yard		= 60;
	optional criu_pre_dump_mode	pre_dump_mode		= 61 [default = SPLICE];
	optional int32			pidfd_store_sk		= 62;
	optional string			lsm_mount_context	= 63;
	optional criu_network_lock_method	network_lock		= 64 [default = IPTABLES];
	optional bool			mntns_compat_mode	= 65;
	optional bool			skip_file_rwx_check	= 66;
	optional bool			unprivileged		= 67;
	optional bool			leave_stopped		= 69;
	optional bool			display_stats		= 70;
	optional bool			log_to_stderr		= 71;
	/* CloudLinux LVE: match CLI --root-only (see cr_options.h / config.c) */
	optional bool			root_only		= 72;
/*	optional bool			check_mounts		= 128;	*/
}

message criu_dump_resp {
	optional bool restored		= 1;
}

message criu_restore_resp {
	required int32 pid		= 1;
}

message criu_notify {
	optional string script		= 1;
	optional int32	pid		= 2;
}

enum criu_req_type {
	EMPTY		= 0;
	DUMP		= 1;
	RESTORE		= 2;
	CHECK		= 3;
	PRE_DUMP	= 4;
	PAGE_SERVER	= 5;

NOTIFY		= 6;

CPUINFO_DUMP	= 7;
	CPUINFO_CHECK	= 8;

FEATURE_CHECK	= 9;

VERSION		= 10;

WAIT_PID	= 11;
	PAGE_SERVER_CHLD = 12;

SINGLE_PRE_DUMP = 13;
}

/*
 * List of features which can queried via
 * CRIU_REQ_TYPE__FEATURE_CHECK
 */
message criu_features {
	optional bool			mem_track	= 1;
	optional bool			lazy_pages	= 2;
	optional bool			pidfd_store	= 3;
}

/*
 * Request -- each type corresponds to must-be-there
 * request arguments of respective type
 */

message criu_req {
	required criu_req_type		type		= 1;

optional criu_opts		opts		= 2;
	optional bool			notify_success	= 3;

/*
	 * When set service won't close the connection but
	 * will wait for more req-s to appear. Works not
	 * for all request types.
	 */
	optional bool			keep_open	= 4;
	/*
	 * 'features' can be used to query which features
	 * are supported by the installed criu/kernel
	 * via RPC.
	 */
	optional criu_features		features	= 5;

/* 'pid' is used for WAIT_PID */
	optional uint32			pid		= 6;
}

/*
 * Response -- it states whether the request was served
 * and additional request-specific information
 */

message criu_resp {
	required criu_req_type		type		= 1;
	required bool			success		= 2;

optional criu_dump_resp		dump		= 3;
	optional criu_restore_resp	restore		= 4;
	optional criu_notify		notify		= 5;
	optional criu_page_server_info	ps		= 6;

optional int32			cr_errno	= 7;
	optional criu_features		features	= 8;
	optional string			cr_errmsg	= 9;
	optional criu_version		version		= 10;

optional int32			status		= 11;
}

/* Answer for criu_req_type.VERSION requests */
message criu_version {
	required int32			major_number	= 1;
	required int32			minor_number	= 2;
	optional string			gitid		= 3;
	optional int32			sublevel	= 4;
	optional int32			extra		= 5;
	optional string			name		= 6;
}

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