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/nfsclient/nfsm_subs.h,v 1.38 2008/02/13 00:04:58 jhb Exp $
34 */
35
36 #ifndef _NFSCLIENT_NFSM_SUBS_H_
37 #define _NFSCLIENT_NFSM_SUBS_H_
38
39 #include <nfs/nfs_common.h>
40
41 #define nfsv2tov_type(a) nv2tov_type[fxdr_unsigned(u_int32_t,(a))&0x7]
42
43 struct ucred;
44 struct vnode;
45
46 /*
47 * These macros do strange and peculiar things to mbuf chains for
48 * the assistance of the nfs code. To attempt to use them for any
49 * other purpose will be dangerous. (they make weird assumptions)
50 */
51
52 /*
53 * First define what the actual subs. return
54 */
55 u_int32_t nfs_xid_gen(void);
56 struct mbuf *nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz);
57 struct mbuf *nfsm_rpchead(struct ucred *cr, int nmflag, int procid,
58 int auth_type, int auth_len,
59 struct mbuf *mrest, int mrest_len,
60 struct mbuf **mbp, u_int32_t **xidpp);
61
62 #define M_HASCL(m) ((m)->m_flags & M_EXT)
63 #define NFSMINOFF(m) \
64 do { \
65 if (M_HASCL(m)) \
66 (m)->m_data = (m)->m_ext.ext_buf; \
67 else if ((m)->m_flags & M_PKTHDR) \
68 (m)->m_data = (m)->m_pktdat; \
69 else \
70 (m)->m_data = (m)->m_dat; \
71 } while (0)
72 #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
73 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
74
75 /*
76 * Now for the macros that do the simple stuff and call the functions
77 * for the hard stuff.
78 * These macros use several vars. declared in nfsm_reqhead and these
79 * vars. must not be used elsewhere unless you are careful not to corrupt
80 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
81 * that may be used so long as the value is not expected to retained
82 * after a macro.
83 * I know, this is kind of dorkey, but it makes the actual op functions
84 * fairly clean and deals with the mess caused by the xdr discriminating
85 * unions.
86 */
87
88
89 /* *********************************** */
90 /* Request generation phase macros */
91
92 int nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb,
93 caddr_t *bpos);
94 void nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
95 caddr_t *bpos);
96 int nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb,
97 caddr_t *bpos);
98
99 #define nfsm_bcheck(t1, mreq) \
100 do { \
101 if (t1) { \
102 error = t1; \
103 m_freem(mreq); \
104 goto nfsmout; \
105 } \
106 } while (0)
107
108 #define nfsm_fhtom(v, v3) \
109 do { \
110 int32_t t1; \
111 t1 = nfsm_fhtom_xx((v), (v3), &mb, &bpos); \
112 nfsm_bcheck(t1, mreq); \
113 } while (0)
114
115 /* If full is true, set all fields, otherwise just set mode and time fields */
116 #define nfsm_v3attrbuild(a, full) \
117 nfsm_v3attrbuild_xx(a, full, &mb, &bpos)
118
119 #define nfsm_uiotom(p, s) \
120 do { \
121 int t1; \
122 t1 = nfsm_uiotombuf((p), &mb, (s), &bpos); \
123 nfsm_bcheck(t1, mreq); \
124 } while (0)
125
126 #define nfsm_strtom(a, s, m) \
127 do { \
128 int t1; \
129 t1 = nfsm_strtom_xx((a), (s), (m), &mb, &bpos); \
130 nfsm_bcheck(t1, mreq); \
131 } while (0)
132
133 /* *********************************** */
134 /* Send the request */
135
136 #define nfsm_request(v, t, p, c) \
137 do { \
138 sigset_t oldset; \
139 nfs_set_sigmask(p, &oldset); \
140 error = nfs_request((v), mreq, (t), (p), (c), &mrep, &md, &dpos); \
141 nfs_restore_sigmask(p, &oldset); \
142 if (error != 0) { \
143 if (error & NFSERR_RETERR) \
144 error &= ~NFSERR_RETERR; \
145 else \
146 goto nfsmout; \
147 } \
148 } while (0)
149
150 #define nfsm_request_mnt(n, t, p, c) \
151 do { \
152 error = nfs4_request_mnt((n), mreq, (t), (p), (c), &mrep, &md, &dpos); \
153 if (error != 0) { \
154 if (error & NFSERR_RETERR) \
155 error &= ~NFSERR_RETERR; \
156 else \
157 goto nfsmout; \
158 } \
159 } while (0)
160
161 /* *********************************** */
162 /* Reply interpretation phase macros */
163
164 int nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
165 struct mbuf **md, caddr_t *dpos);
166 int nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md,
167 caddr_t *dpos);
168 int nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
169 caddr_t *dpos);
170 int nfsm_postop_attr_xx(struct vnode **v, int *f, struct mbuf **md,
171 caddr_t *dpos);
172 int nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md,
173 caddr_t *dpos);
174
175 #define nfsm_mtofh(d, v, v3, f) \
176 do { \
177 int32_t t1; \
178 t1 = nfsm_mtofh_xx((d), &(v), (v3), &(f), &md, &dpos); \
179 nfsm_dcheck(t1, mrep); \
180 } while (0)
181
182 #define nfsm_getfh(f, s, v3) \
183 do { \
184 int32_t t1; \
185 t1 = nfsm_getfh_xx(&(f), &(s), (v3), &md, &dpos); \
186 nfsm_dcheck(t1, mrep); \
187 } while (0)
188
189 #define nfsm_loadattr(v, a) \
190 do { \
191 int32_t t1; \
192 t1 = nfsm_loadattr_xx(&v, a, &md, &dpos); \
193 nfsm_dcheck(t1, mrep); \
194 } while (0)
195
196 #define nfsm_postop_attr(v, f) \
197 do { \
198 int32_t t1; \
199 t1 = nfsm_postop_attr_xx(&v, &f, &md, &dpos); \
200 nfsm_dcheck(t1, mrep); \
201 } while (0)
202
203 /* Used as (f) for nfsm_wcc_data() */
204 #define NFSV3_WCCRATTR 0
205 #define NFSV3_WCCCHK 1
206
207 #define nfsm_wcc_data(v, f) \
208 do { \
209 int32_t t1; \
210 t1 = nfsm_wcc_data_xx(&v, &f, &md, &dpos); \
211 nfsm_dcheck(t1, mrep); \
212 } while (0)
213
214 #endif
215
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