1 /*-
2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * Rick Macklem at The University of Guelph.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95
33 * $FreeBSD: src/sys/nfsserver/nfsm_subs.h,v 1.40 2008/11/03 10:38:00 dfr Exp $
34 */
35
36 #ifndef _NFSSERVER_NFSM_SUBS_H_
37 #define _NFSSERVER_NFSM_SUBS_H_
38
39 #include <nfs/nfs_common.h>
40
41 #define nfstov_mode(a) (fxdr_unsigned(u_int32_t, (a)) & ALLPERMS)
42
43 /*
44 * These macros do strange and peculiar things to mbuf chains for
45 * the assistance of the nfs code. To attempt to use them for any
46 * other purpose will be dangerous. (they make weird assumptions)
47 */
48
49 /*
50 * First define what the actual subs. return
51 */
52
53 #define M_HASCL(m) ((m)->m_flags & M_EXT)
54 #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
55 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
56
57 /*
58 * Now for the macros that do the simple stuff and call the functions
59 * for the hard stuff.
60 * These macros use several vars. declared in nfsm_reqhead and these
61 * vars. must not be used elsewhere unless you are careful not to corrupt
62 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
63 * that may be used so long as the value is not expected to retained
64 * after a macro.
65 * I know, this is kind of dorkey, but it makes the actual op functions
66 * fairly clean and deals with the mess caused by the xdr discriminating
67 * unions.
68 */
69
70
71
72 /* ************************************* */
73 /* Dissection phase macros */
74
75 int nfsm_srvstrsiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
76 int nfsm_srvnamesiz_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
77 int nfsm_srvnamesiz0_xx(int *s, int m, struct mbuf **md, caddr_t *dpos);
78 int nfsm_srvmtofh_xx(fhandle_t *f, int v3, struct mbuf **md, caddr_t *dpos);
79 int nfsm_srvsattr_xx(struct vattr *a, struct mbuf **md, caddr_t *dpos);
80
81 #define nfsm_srvstrsiz(s, m) \
82 do { \
83 int t1; \
84 t1 = nfsm_srvstrsiz_xx(&(s), (m), &md, &dpos); \
85 if (t1) { \
86 error = t1; \
87 nfsm_reply(0); \
88 } \
89 } while (0)
90
91 #define nfsm_srvnamesiz(s) \
92 do { \
93 int t1; \
94 t1 = nfsm_srvnamesiz_xx(&(s), NFS_MAXNAMLEN, &md, &dpos); \
95 if (t1) { \
96 error = t1; \
97 nfsm_reply(0); \
98 } \
99 } while (0)
100
101 #define nfsm_srvpathsiz(s) \
102 do { \
103 int t1; \
104 t1 = nfsm_srvnamesiz0_xx(&(s), NFS_MAXPATHLEN, &md, &dpos); \
105 if (t1) { \
106 error = t1; \
107 nfsm_reply(0); \
108 } \
109 } while (0)
110
111 #define nfsm_srvmtofh(f) \
112 do { \
113 int t1; \
114 t1 = nfsm_srvmtofh_xx((f), nfsd->nd_flag & ND_NFSV3, &md, &dpos); \
115 if (t1) { \
116 error = t1; \
117 nfsm_reply(0); \
118 } \
119 } while (0)
120
121 /* XXX why is this different? */
122 #define nfsm_srvsattr(a) \
123 do { \
124 int t1; \
125 t1 = nfsm_srvsattr_xx((a), &md, &dpos); \
126 if (t1) { \
127 error = t1; \
128 m_freem(mrep); \
129 mrep = NULL; \
130 goto nfsmout; \
131 } \
132 } while (0)
133
134 /* ************************************* */
135 /* Prepare the reply */
136
137 #define nfsm_reply(s) \
138 do { \
139 if (mrep != NULL) { \
140 m_freem(mrep); \
141 mrep = NULL; \
142 } \
143 mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
144 *mrq = mreq; \
145 if (error == EBADRPC) { \
146 error = 0; \
147 goto nfsmout; \
148 } \
149 } while (0)
150
151 #define nfsm_writereply(s) \
152 do { \
153 mreq = nfs_rephead((s), nfsd, error, &mb, &bpos); \
154 } while(0)
155
156 /* ************************************* */
157 /* Reply phase macros - add additional reply info */
158
159 void nfsm_srvfhtom_xx(fhandle_t *f, int v3, struct mbuf **mb,
160 caddr_t *bpos);
161 void nfsm_srvpostop_fh_xx(fhandle_t *f, struct mbuf **mb, caddr_t *bpos);
162 void nfsm_clget_xx(u_int32_t **tl, struct mbuf *mb, struct mbuf **mp,
163 char **bp, char **be, caddr_t bpos);
164
165 #define nfsm_srvfhtom(f, v3) \
166 nfsm_srvfhtom_xx((f), (v3), &mb, &bpos)
167
168 #define nfsm_srvpostop_fh(f) \
169 nfsm_srvpostop_fh_xx((f), &mb, &bpos)
170
171 #define nfsm_srvwcc_data(br, b, ar, a) \
172 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos)
173
174 #define nfsm_srvpostop_attr(r, a) \
175 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos)
176
177 #define nfsm_srvfillattr(a, f) \
178 nfsm_srvfattr(nfsd, (a), (f))
179
180 #define nfsm_clget \
181 nfsm_clget_xx(&tl, mb, &mp, &bp, &be, bpos)
182
183 #endif
184
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