FreeBSD/Linux Kernel Cross Reference
sys/rpc/rpcm_subs.h
1 /* $FreeBSD$ */
2 /* $OpenBSD: nfsm_subs.h,v 1.11 2000/01/05 20:50:52 millert Exp $ */
3 /* $NetBSD: nfsm_subs.h,v 1.10 1996/03/20 21:59:56 fvdl Exp $ */
4
5 /*-
6 * SPDX-License-Identifier: BSD-3-Clause
7 *
8 * copyright (c) 2003
9 * the regents of the university of michigan
10 * all rights reserved
11 *
12 * permission is granted to use, copy, create derivative works and redistribute
13 * this software and such derivative works for any purpose, so long as the name
14 * of the university of michigan is not used in any advertising or publicity
15 * pertaining to the use or distribution of this software without specific,
16 * written prior authorization. if the above copyright notice or any other
17 * identification of the university of michigan is included in any copy of any
18 * portion of this software, then the disclaimer below must also be included.
19 *
20 * this software is provided as is, without representation from the university
21 * of michigan as to its fitness for any purpose, and without warranty by the
22 * university of michigan of any kind, either express or implied, including
23 * without limitation the implied warranties of merchantability and fitness for
24 * a particular purpose. the regents of the university of michigan shall not be
25 * liable for any damages, including special, indirect, incidental, or
26 * consequential damages, with respect to any claim arising out of or in
27 * connection with the use of the software, even if it has been or is hereafter
28 * advised of the possibility of such damages.
29 */
30
31 /*-
32 * Copyright (c) 1989, 1993
33 * The Regents of the University of California. All rights reserved.
34 *
35 * This code is derived from software contributed to Berkeley by
36 * Rick Macklem at The University of Guelph.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 * 1. Redistributions of source code must retain the above copyright
42 * notice, this list of conditions and the following disclaimer.
43 * 2. Redistributions in binary form must reproduce the above copyright
44 * notice, this list of conditions and the following disclaimer in the
45 * documentation and/or other materials provided with the distribution.
46 * 3. Neither the name of the University nor the names of its contributors
47 * may be used to endorse or promote products derived from this software
48 * without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * SUCH DAMAGE.
61 *
62 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
63 */
64
65
66 #ifndef _RPC_RPCM_SUBS_H_
67 #define _RPC_RPCM_SUBS_H_
68
69
70 /*
71 * Now for the macros that do the simple stuff and call the functions
72 * for the hard stuff.
73 * These macros use several vars. declared in rpcm_reqhead and these
74 * vars. must not be used elsewhere unless you are careful not to corrupt
75 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
76 * that may be used so long as the value is not expected to retained
77 * after a macro.
78 * I know, this is kind of dorkey, but it makes the actual op functions
79 * fairly clean and deals with the mess caused by the xdr discriminating
80 * unions.
81 */
82
83 #define rpcm_build(a,c,s) \
84 { if ((s) > M_TRAILINGSPACE(mb)) { \
85 mb2 = m_get(M_WAITOK, MT_DATA); \
86 if ((s) > MLEN) \
87 panic("build > MLEN"); \
88 mb->m_next = mb2; \
89 mb = mb2; \
90 mb->m_len = 0; \
91 bpos = mtod(mb, caddr_t); \
92 } \
93 (a) = (c)(bpos); \
94 mb->m_len += (s); \
95 bpos += (s); }
96
97 #define rpcm_dissect(a, c, s) \
98 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \
99 if (t1 >= (s)) { \
100 (a) = (c)(dpos); \
101 dpos += (s); \
102 } else if ((t1 = rpcm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \
103 error = t1; \
104 goto rpcmout; \
105 } else { \
106 (a) = (c)cp2; \
107 } }
108
109 #if 0
110 #define rpcm_mtouio(p,s) \
111 if ((s) > 0 && \
112 (t1 = rpcm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \
113 error = t1; \
114 goto rpcmout; \
115 }
116 #endif
117
118 #define rpcm_rndup(a) (((a)+3)&(~0x3))
119
120 #define rpcm_adv(s) \
121 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \
122 if (t1 >= (s)) { \
123 dpos += (s); \
124 } else if ((t1 = rpc_adv(&md, &dpos, (s), t1)) != 0) { \
125 error = t1; \
126 goto rpcmout; \
127 } }
128
129 #define RPCMADV(m, s) (m)->m_data += (s)
130
131 #endif /* _RPC_RPCM_SUBS_H_ */
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