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      1 /*	$NetBSD: nfs_common.h,v 1.1.1.1 2013/09/30 07:19:32 dholland Exp $	*/
      2 /*-
      3  * Copyright (c) 1989, 1993
      4  *	The Regents of the University of California.  All rights reserved.
      5  *
      6  * This code is derived from software contributed to Berkeley by
      7  * Rick Macklem at The University of Guelph.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	@(#)nfsm_subs.h	8.2 (Berkeley) 3/30/95
     34  * FreeBSD: head/sys/nfs/nfs_common.h 245568 2013-01-17 19:03:24Z jhb
     35  * $NetBSD: nfs_common.h,v 1.1.1.1 2013/09/30 07:19:32 dholland Exp $
     36  */
     37 
     38 #ifndef _NFS_NFS_COMMON_H_
     39 #define _NFS_NFS_COMMON_H_
     40 
     41 extern enum vtype nv3tov_type[];
     42 extern nfstype nfsv3_type[];
     43 
     44 #define	vtonfsv2_mode(t, m) \
     45     txdr_unsigned(((t) == VFIFO) ? MAKEIMODE(VCHR, (m)) : MAKEIMODE((t), (m)))
     46 
     47 #define	nfsv3tov_type(a)	nv3tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
     48 #define	vtonfsv3_type(a)	txdr_unsigned(nfsv3_type[((int32_t)(a))])
     49 
     50 int	nfs_adv(struct mbuf **, caddr_t *, int, int);
     51 void	*nfsm_disct(struct mbuf **, caddr_t *, int, int, int);
     52 int	nfs_realign(struct mbuf **, int);
     53 
     54 /* ****************************** */
     55 /* Build request/reply phase macros */
     56 
     57 void	*nfsm_build_xx(int s, struct mbuf **mb, caddr_t *bpos);
     58 
     59 #define	nfsm_build(c, s) \
     60 	(c)nfsm_build_xx((s), &mb, &bpos)
     61 
     62 /* ****************************** */
     63 /* Interpretation phase macros */
     64 
     65 void	*nfsm_dissect_xx(int s, struct mbuf **md, caddr_t *dpos);
     66 void	*nfsm_dissect_xx_nonblock(int s, struct mbuf **md, caddr_t *dpos);
     67 int	nfsm_strsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
     68 int	nfsm_adv_xx(int s, struct mbuf **md, caddr_t *dpos);
     69 
     70 /* Error check helpers */
     71 #define nfsm_dcheck(t1, mrep) \
     72 do { \
     73 	if (t1 != 0) { \
     74 		error = t1; \
     75 		m_freem((mrep)); \
     76 		(mrep) = NULL; \
     77 		goto nfsmout; \
     78 	} \
     79 } while (0)
     80 
     81 #define nfsm_dcheckp(retp, mrep) \
     82 do { \
     83 	if (retp == NULL) { \
     84 		error = EBADRPC; \
     85 		m_freem((mrep)); \
     86 		(mrep) = NULL; \
     87 		goto nfsmout; \
     88 	} \
     89 } while (0)
     90 
     91 #define	nfsm_dissect(c, s) \
     92 ({ \
     93 	void *ret; \
     94 	ret = nfsm_dissect_xx((s), &md, &dpos); \
     95 	nfsm_dcheckp(ret, mrep); \
     96 	(c)ret; \
     97 })
     98 
     99 #define	nfsm_dissect_nonblock(c, s) \
    100 ({ \
    101 	void *ret; \
    102 	ret = nfsm_dissect_xx_nonblock((s), &md, &dpos); \
    103 	nfsm_dcheckp(ret, mrep); \
    104 	(c)ret; \
    105 })
    106 
    107 #define	nfsm_strsiz(s,m) \
    108 do { \
    109 	int t1; \
    110 	t1 = nfsm_strsiz_xx(&(s), (m), &md, &dpos); \
    111 	nfsm_dcheck(t1, mrep); \
    112 } while(0)
    113 
    114 #define nfsm_mtouio(p,s) \
    115 do {\
    116 	int32_t t1 = 0; \
    117 	if ((s) > 0) \
    118 		t1 = nfsm_mbuftouio(&md, (p), (s), &dpos); \
    119 	nfsm_dcheck(t1, mrep); \
    120 } while (0)
    121 
    122 #define nfsm_rndup(a)	(((a)+3)&(~0x3))
    123 
    124 #define	nfsm_adv(s) \
    125 do { \
    126 	int t1; \
    127 	t1 = nfsm_adv_xx((s), &md, &dpos); \
    128 	nfsm_dcheck(t1, mrep); \
    129 } while (0)
    130 
    131 #ifdef __NO_STRICT_ALIGNMENT
    132 #define nfsm_aligned(p, t)	1
    133 #else
    134 #define nfsm_aligned(p, t)	((((u_long)(p)) & (sizeof(t) - 1)) == 0)
    135 #endif
    136 
    137 #endif
    138