text: /*-
   * SPDX-License-Identifier: BSD-3-Clause
   *
   * Copyright (c) 1989, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Rick Macklem at The University of Guelph.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   *	@(#)nfsm_subs.h	8.2 (Berkeley) 3/30/95
   * $FreeBSD$
   */
  
  #ifndef _NFS_NFS_COMMON_H_
  #define _NFS_NFS_COMMON_H_
  
  extern enum vtype nv3tov_type[];
  extern nfstype nfsv3_type[];
  
  #define	vtonfsv2_mode(t, m) \
      txdr_unsigned(((t) == VFIFO) ? MAKEIMODE(VCHR, (m)) : MAKEIMODE((t), (m)))
  
  #define	nfsv3tov_type(a)	nv3tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
  #define	vtonfsv3_type(a)	txdr_unsigned(nfsv3_type[((int32_t)(a))])
  
  int	nfs_adv(struct mbuf **, caddr_t *, int, int);
  void	*nfsm_disct(struct mbuf **, caddr_t *, int, int, int);
  int	nfs_realign(struct mbuf **, int);
  
  /* ****************************** */
  /* Build request/reply phase macros */
  
  void	*nfsm_build_xx(int s, struct mbuf **mb, caddr_t *bpos);
  
  #define	nfsm_build(c, s) \
  	(c)nfsm_build_xx((s), &mb, &bpos)
  
  /* ****************************** */
  /* Interpretation phase macros */
  
  void	*nfsm_dissect_xx(int s, struct mbuf **md, caddr_t *dpos);
  void	*nfsm_dissect_xx_nonblock(int s, struct mbuf **md, caddr_t *dpos);
  int	nfsm_strsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
  int	nfsm_adv_xx(int s, struct mbuf **md, caddr_t *dpos);
  
  /* Error check helpers */
  #define nfsm_dcheck(t1, mrep) \
  do { \
  	if (t1 != 0) { \
  		error = t1; \
  		m_freem((mrep)); \
  		(mrep) = NULL; \
  		goto nfsmout; \
  	} \
  } while (0)
  
  #define nfsm_dcheckp(retp, mrep) \
  do { \
  	if (retp == NULL) { \
  		error = EBADRPC; \
  		m_freem((mrep)); \
  		(mrep) = NULL; \
  		goto nfsmout; \
  	} \
  } while (0)
  
  #define	nfsm_dissect(c, s) \
  ({ \
  	void *ret; \
  	ret = nfsm_dissect_xx((s), &md, &dpos); \
  	nfsm_dcheckp(ret, mrep); \
  	(c)ret; \
  })
  
  #define	nfsm_dissect_nonblock(c, s) \
  ({ \
  	void *ret; \
  	ret = nfsm_dissect_xx_nonblock((s), &md, &dpos); \
  	nfsm_dcheckp(ret, mrep); \
  	(c)ret; \
  })
  
  #define	nfsm_strsiz(s,m) \
  do { \
  	int t1; \
  	t1 = nfsm_strsiz_xx(&(s), (m), &md, &dpos); \
  	nfsm_dcheck(t1, mrep); \
  } while(0)
  
  #define nfsm_mtouio(p,s) \
  do {\
  	int32_t t1 = 0; \
  	if ((s) > 0) \
  		t1 = nfsm_mbuftouio(&md, (p), (s), &dpos); \
  	nfsm_dcheck(t1, mrep); \
  } while (0)
  
  #define nfsm_rndup(a)	(((a)+3)&(~0x3))
  
  #define	nfsm_adv(s) \
  do { \
  	int t1; \
  	t1 = nfsm_adv_xx((s), &md, &dpos); \
  	nfsm_dcheck(t1, mrep); \
  } while (0)
  
  #ifdef __NO_STRICT_ALIGNMENT
  #define nfsm_aligned(p, t)	1
  #else
  #define nfsm_aligned(p, t)	((((u_long)(p)) & (sizeof(t) - 1)) == 0)
  #endif
  
  #endif
  