cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

cld.h (3122B)

      1/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
      2/*
      3 * Upcall description for nfsdcld communication
      4 *
      5 * Copyright (c) 2012 Red Hat, Inc.
      6 * Author(s): Jeff Layton <jlayton@redhat.com>
      7 *
      8 *  This program is free software; you can redistribute it and/or modify
      9 *  it under the terms of the GNU General Public License as published by
     10 *  the Free Software Foundation; either version 2 of the License, or
     11 *  (at your option) any later version.
     12 *
     13 *  This program is distributed in the hope that it will be useful,
     14 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     15 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     16 *  GNU General Public License for more details.
     17 *
     18 *  You should have received a copy of the GNU General Public License
     19 *  along with this program; if not, write to the Free Software
     20 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
     21 */
     22
     23#ifndef _NFSD_CLD_H
     24#define _NFSD_CLD_H
     25
     26#include <linux/types.h>
     27
     28/* latest upcall version available */
     29#define CLD_UPCALL_VERSION 2
     30
     31/* defined by RFC3530 */
     32#define NFS4_OPAQUE_LIMIT 1024
     33
     34#ifndef SHA256_DIGEST_SIZE
     35#define SHA256_DIGEST_SIZE      32
     36#endif
     37
     38enum cld_command {
     39	Cld_Create,		/* create a record for this cm_id */
     40	Cld_Remove,		/* remove record of this cm_id */
     41	Cld_Check,		/* is this cm_id allowed? */
     42	Cld_GraceDone,		/* grace period is complete */
     43	Cld_GraceStart,		/* grace start (upload client records) */
     44	Cld_GetVersion,		/* query max supported upcall version */
     45};
     46
     47/* representation of long-form NFSv4 client ID */
     48struct cld_name {
     49	__u16		cn_len;				/* length of cm_id */
     50	unsigned char	cn_id[NFS4_OPAQUE_LIMIT];	/* client-provided */
     51} __attribute__((packed));
     52
     53/* sha256 hash of the kerberos principal */
     54struct cld_princhash {
     55	__u8		cp_len;				/* length of cp_data */
     56	unsigned char	cp_data[SHA256_DIGEST_SIZE];	/* hash of principal */
     57} __attribute__((packed));
     58
     59struct cld_clntinfo {
     60	struct cld_name		cc_name;
     61	struct cld_princhash	cc_princhash;
     62} __attribute__((packed));
     63
     64/* message struct for communication with userspace */
     65struct cld_msg {
     66	__u8		cm_vers;		/* upcall version */
     67	__u8		cm_cmd;			/* upcall command */
     68	__s16		cm_status;		/* return code */
     69	__u32		cm_xid;			/* transaction id */
     70	union {
     71		__s64		cm_gracetime;	/* grace period start time */
     72		struct cld_name	cm_name;
     73		__u8		cm_version;	/* for getting max version */
     74	} __attribute__((packed)) cm_u;
     75} __attribute__((packed));
     76
     77/* version 2 message can include hash of kerberos principal */
     78struct cld_msg_v2 {
     79	__u8		cm_vers;		/* upcall version */
     80	__u8		cm_cmd;			/* upcall command */
     81	__s16		cm_status;		/* return code */
     82	__u32		cm_xid;			/* transaction id */
     83	union {
     84		struct cld_name	cm_name;
     85		__u8		cm_version;	/* for getting max version */
     86		struct cld_clntinfo cm_clntinfo; /* name & princ hash */
     87	} __attribute__((packed)) cm_u;
     88} __attribute__((packed));
     89
     90struct cld_msg_hdr {
     91	__u8		cm_vers;		/* upcall version */
     92	__u8		cm_cmd;			/* upcall command */
     93	__s16		cm_status;		/* return code */
     94	__u32		cm_xid;			/* transaction id */
     95} __attribute__((packed));
     96
     97#endif /* !_NFSD_CLD_H */