text: /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
  /* keyctl.h: keyctl command IDs
   *
   * Copyright (C) 2004, 2008 Red Hat, Inc. All Rights Reserved.
   * Written by David Howells (dhowells@redhat.com)
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   */
  
  #ifndef _LINUX_KEYCTL_H
  #define _LINUX_KEYCTL_H
  
  #include <linux/types.h>
  
  /* special process keyring shortcut IDs */
  #define KEY_SPEC_THREAD_KEYRING		-1	/* - key ID for thread-specific keyring */
  #define KEY_SPEC_PROCESS_KEYRING	-2	/* - key ID for process-specific keyring */
  #define KEY_SPEC_SESSION_KEYRING	-3	/* - key ID for session-specific keyring */
  #define KEY_SPEC_USER_KEYRING		-4	/* - key ID for UID-specific keyring */
  #define KEY_SPEC_USER_SESSION_KEYRING	-5	/* - key ID for UID-session keyring */
  #define KEY_SPEC_GROUP_KEYRING		-6	/* - key ID for GID-specific keyring */
  #define KEY_SPEC_REQKEY_AUTH_KEY	-7	/* - key ID for assumed request_key auth key */
  #define KEY_SPEC_REQUESTOR_KEYRING	-8	/* - key ID for request_key() dest keyring */
  
  /* request-key default keyrings */
  #define KEY_REQKEY_DEFL_NO_CHANGE		-1
  #define KEY_REQKEY_DEFL_DEFAULT			0
  #define KEY_REQKEY_DEFL_THREAD_KEYRING		1
  #define KEY_REQKEY_DEFL_PROCESS_KEYRING		2
  #define KEY_REQKEY_DEFL_SESSION_KEYRING		3
  #define KEY_REQKEY_DEFL_USER_KEYRING		4
  #define KEY_REQKEY_DEFL_USER_SESSION_KEYRING	5
  #define KEY_REQKEY_DEFL_GROUP_KEYRING		6
  #define KEY_REQKEY_DEFL_REQUESTOR_KEYRING	7
  
  /* keyctl commands */
  #define KEYCTL_GET_KEYRING_ID		0	/* ask for a keyring's ID */
  #define KEYCTL_JOIN_SESSION_KEYRING	1	/* join or start named session keyring */
  #define KEYCTL_UPDATE			2	/* update a key */
  #define KEYCTL_REVOKE			3	/* revoke a key */
  #define KEYCTL_CHOWN			4	/* set ownership of a key */
  #define KEYCTL_SETPERM			5	/* set perms on a key */
  #define KEYCTL_DESCRIBE			6	/* describe a key */
  #define KEYCTL_CLEAR			7	/* clear contents of a keyring */
  #define KEYCTL_LINK			8	/* link a key into a keyring */
  #define KEYCTL_UNLINK			9	/* unlink a key from a keyring */
  #define KEYCTL_SEARCH			10	/* search for a key in a keyring */
  #define KEYCTL_READ			11	/* read a key or keyring's contents */
  #define KEYCTL_INSTANTIATE		12	/* instantiate a partially constructed key */
  #define KEYCTL_NEGATE			13	/* negate a partially constructed key */
  #define KEYCTL_SET_REQKEY_KEYRING	14	/* set default request-key keyring */
  #define KEYCTL_SET_TIMEOUT		15	/* set key timeout */
  #define KEYCTL_ASSUME_AUTHORITY		16	/* assume request_key() authorisation */
  #define KEYCTL_GET_SECURITY		17	/* get key security label */
  #define KEYCTL_SESSION_TO_PARENT	18	/* apply session keyring to parent process */
  #define KEYCTL_REJECT			19	/* reject a partially constructed key */
  #define KEYCTL_INSTANTIATE_IOV		20	/* instantiate a partially constructed key */
  #define KEYCTL_INVALIDATE		21	/* invalidate a key */
  #define KEYCTL_GET_PERSISTENT		22	/* get a user's persistent keyring */
  #define KEYCTL_DH_COMPUTE		23	/* Compute Diffie-Hellman values */
  #define KEYCTL_RESTRICT_KEYRING		29	/* Restrict keys allowed to link to a keyring */
  
  /* keyctl structures */
  struct keyctl_dh_params {
  	__s32 private;
  	__s32 prime;
  	__s32 base;
  };
  
  struct keyctl_kdf_params {
  	char *hashname;
  	char *otherinfo;
  	__u32 otherinfolen;
  	__u32 __spare[8];
  };
  
  #endif /*  _LINUX_KEYCTL_H */