Commit | Line | Data |
---|---|---|
a2907882 KM |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Rick Macklem at The University of Guelph. | |
7 | * | |
dbf0c423 | 8 | * %sccs.include.redist.c% |
a2907882 | 9 | * |
2c5b44a2 | 10 | * @(#)nfsm_subs.h 7.12 (Berkeley) %G% |
a2907882 KM |
11 | */ |
12 | ||
13 | /* | |
14 | * These macros do strange and peculiar things to mbuf chains for | |
15 | * the assistance of the nfs code. To attempt to use them for any | |
16 | * other purpose will be dangerous. (they make weird assumptions) | |
17 | */ | |
18 | ||
19 | /* | |
20 | * First define what the actual subs. return | |
21 | */ | |
0bd503ad | 22 | extern struct mbuf *nfsm_reqh(); |
a2907882 | 23 | |
a2907882 | 24 | #define M_HASCL(m) ((m)->m_flags & M_EXT) |
a2907882 KM |
25 | #define NFSMINOFF(m) \ |
26 | if (M_HASCL(m)) \ | |
27 | (m)->m_data = (m)->m_ext.ext_buf; \ | |
2c5b44a2 KM |
28 | else if ((m)->m_flags & M_PKTHDR) \ |
29 | (m)->m_data = (m)->m_pktdat; \ | |
a2907882 KM |
30 | else \ |
31 | (m)->m_data = (m)->m_dat | |
32 | #define NFSMADV(m, s) (m)->m_data += (s) | |
36c3043b | 33 | #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ |
a2907882 | 34 | (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) |
a2907882 KM |
35 | |
36 | /* | |
37 | * Now for the macros that do the simple stuff and call the functions | |
38 | * for the hard stuff. | |
39 | * These macros use several vars. declared in nfsm_reqhead and these | |
40 | * vars. must not be used elsewhere unless you are careful not to corrupt | |
41 | * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries | |
42 | * that may be used so long as the value is not expected to retained | |
43 | * after a macro. | |
44 | * I know, this is kind of dorkey, but it makes the actual op functions | |
45 | * fairly clean and deals with the mess caused by the xdr discriminating | |
46 | * unions. | |
47 | */ | |
48 | ||
49 | #define nfsm_build(a,c,s) \ | |
2c5b44a2 | 50 | { if ((s) > M_TRAILINGSPACE(mb)) { \ |
a2907882 KM |
51 | MGET(mb2, M_WAIT, MT_DATA); \ |
52 | if ((s) > MLEN) \ | |
53 | panic("build > MLEN"); \ | |
54 | mb->m_next = mb2; \ | |
55 | mb = mb2; \ | |
56 | mb->m_len = 0; \ | |
57 | bpos = mtod(mb, caddr_t); \ | |
58 | } \ | |
59 | (a) = (c)(bpos); \ | |
60 | mb->m_len += (s); \ | |
2c5b44a2 | 61 | bpos += (s); } |
a2907882 | 62 | |
2c5b44a2 KM |
63 | #define nfsm_dissect(a,c,s) \ |
64 | { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ | |
a2907882 KM |
65 | if (t1 >= (s)) { \ |
66 | (a) = (c)(dpos); \ | |
67 | dpos += (s); \ | |
68 | } else if (error = nfsm_disct(&md, &dpos, (s), t1, TRUE, &cp2)) { \ | |
69 | m_freem(mrep); \ | |
70 | goto nfsmout; \ | |
71 | } else { \ | |
72 | (a) = (c)cp2; \ | |
2c5b44a2 | 73 | } } |
a2907882 | 74 | |
2c5b44a2 KM |
75 | #define nfsm_dissecton(a,c,s) \ |
76 | { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ | |
a2907882 KM |
77 | if (t1 >= (s)) { \ |
78 | (a) = (c)(dpos); \ | |
79 | dpos += (s); \ | |
80 | } else if (error = nfsm_disct(&md, &dpos, (s), t1, FALSE, &cp2)) { \ | |
81 | m_freem(mrep); \ | |
82 | goto nfsmout; \ | |
83 | } else { \ | |
84 | (a) = (c)cp2; \ | |
2c5b44a2 | 85 | } } |
a2907882 KM |
86 | |
87 | #define nfsm_fhtom(v) \ | |
88 | nfsm_build(cp,caddr_t,NFSX_FH); \ | |
89 | bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH) | |
90 | ||
91 | #define nfsm_srvfhtom(f) \ | |
92 | nfsm_build(cp,caddr_t,NFSX_FH); \ | |
93 | bcopy((caddr_t)(f), cp, NFSX_FH) | |
94 | ||
95 | #define nfsm_mtofh(d,v) \ | |
96 | { struct nfsnode *np; nfsv2fh_t *fhp; \ | |
2c5b44a2 | 97 | nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \ |
a2907882 KM |
98 | if (error = nfs_nget((d)->v_mount, fhp, &np)) { \ |
99 | m_freem(mrep); \ | |
100 | goto nfsmout; \ | |
101 | } \ | |
102 | (v) = NFSTOV(np); \ | |
103 | nfsm_loadattr(v, (struct vattr *)0); \ | |
a2907882 KM |
104 | } |
105 | ||
106 | #define nfsm_loadattr(v,a) \ | |
0bd503ad KM |
107 | { struct vnode *tvp = (v); \ |
108 | if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \ | |
a2907882 KM |
109 | m_freem(mrep); \ |
110 | goto nfsmout; \ | |
0bd503ad KM |
111 | } \ |
112 | (v) = tvp; } | |
a2907882 KM |
113 | |
114 | #define nfsm_strsiz(s,m) \ | |
2c5b44a2 | 115 | { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ |
9fb16cce | 116 | if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \ |
a2907882 KM |
117 | m_freem(mrep); \ |
118 | error = EBADRPC; \ | |
119 | goto nfsmout; \ | |
2c5b44a2 | 120 | } } |
a2907882 KM |
121 | |
122 | #define nfsm_srvstrsiz(s,m) \ | |
2c5b44a2 | 123 | { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ |
9fb16cce | 124 | if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \ |
a2907882 KM |
125 | error = EBADRPC; \ |
126 | nfsm_reply(0); \ | |
2c5b44a2 | 127 | } } |
a2907882 | 128 | |
a2907882 KM |
129 | #define nfsm_mtouio(p,s) \ |
130 | if ((s) > 0 && \ | |
131 | (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ | |
132 | m_freem(mrep); \ | |
133 | goto nfsmout; \ | |
134 | } | |
135 | ||
136 | #define nfsm_uiotom(p,s) \ | |
137 | if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \ | |
138 | m_freem(mreq); \ | |
139 | goto nfsmout; \ | |
140 | } | |
141 | ||
2c5b44a2 KM |
142 | #define nfsm_reqhead(v,a,s) \ |
143 | mb = mreq = nfsm_reqh((v),(a),(s),&bpos) | |
a2907882 | 144 | |
a2907882 KM |
145 | #define nfsm_reqdone m_freem(mrep); \ |
146 | nfsmout: | |
147 | ||
148 | #define nfsm_rndup(a) (((a)+3)&(~0x3)) | |
149 | ||
2c5b44a2 KM |
150 | #define nfsm_request(v, t, p, c) \ |
151 | if (error = nfs_request((v), mreq, (t), (p), \ | |
152 | (c), &mrep, &md, &dpos)) \ | |
a2907882 KM |
153 | goto nfsmout |
154 | ||
155 | #define nfsm_strtom(a,s,m) \ | |
156 | if ((s) > (m)) { \ | |
157 | m_freem(mreq); \ | |
158 | error = ENAMETOOLONG; \ | |
159 | goto nfsmout; \ | |
160 | } \ | |
161 | t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ | |
2c5b44a2 | 162 | if (t2 <= M_TRAILINGSPACE(mb)) { \ |
9fb16cce KM |
163 | nfsm_build(tl,u_long *,t2); \ |
164 | *tl++ = txdr_unsigned(s); \ | |
165 | *(tl+((t2>>2)-2)) = 0; \ | |
166 | bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ | |
a2907882 KM |
167 | } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \ |
168 | m_freem(mreq); \ | |
169 | goto nfsmout; \ | |
170 | } | |
171 | ||
a2907882 KM |
172 | #define nfsm_srvdone \ |
173 | nfsmout: \ | |
174 | return(error) | |
175 | ||
176 | #define nfsm_reply(s) \ | |
177 | { \ | |
2c5b44a2 | 178 | nfsd->nd_repstat = error; \ |
a2907882 | 179 | if (error) \ |
2c5b44a2 KM |
180 | (void) nfs_rephead(0, nfsd, error, cache, &frev, \ |
181 | mrq, &mb, &bpos); \ | |
a2907882 | 182 | else \ |
2c5b44a2 KM |
183 | (void) nfs_rephead((s), nfsd, error, cache, &frev, \ |
184 | mrq, &mb, &bpos); \ | |
a2907882 | 185 | m_freem(mrep); \ |
66435314 | 186 | mreq = *mrq; \ |
a2907882 KM |
187 | if (error) \ |
188 | return(0); \ | |
189 | } | |
190 | ||
191 | #define nfsm_adv(s) \ | |
192 | t1 = mtod(md, caddr_t)+md->m_len-dpos; \ | |
193 | if (t1 >= (s)) { \ | |
194 | dpos += (s); \ | |
195 | } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \ | |
196 | m_freem(mrep); \ | |
197 | goto nfsmout; \ | |
198 | } | |
199 | ||
200 | #define nfsm_srvmtofh(f) \ | |
2c5b44a2 | 201 | nfsm_dissecton(tl, u_long *, NFSX_FH); \ |
9fb16cce | 202 | bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH) |
a2907882 KM |
203 | |
204 | #define nfsm_clget \ | |
205 | if (bp >= be) { \ | |
2c5b44a2 KM |
206 | if (mp == mb) \ |
207 | mp->m_len += bp-bpos; \ | |
a2907882 | 208 | MGET(mp, M_WAIT, MT_DATA); \ |
f0f1cbaa | 209 | MCLGET(mp, M_WAIT); \ |
a2907882 | 210 | mp->m_len = NFSMSIZ(mp); \ |
2c5b44a2 KM |
211 | mp2->m_next = mp; \ |
212 | mp2 = mp; \ | |
a2907882 KM |
213 | bp = mtod(mp, caddr_t); \ |
214 | be = bp+mp->m_len; \ | |
215 | } \ | |
9fb16cce | 216 | tl = (u_long *)bp |
a2907882 | 217 | |
66435314 KM |
218 | #define nfsm_srvfillattr \ |
219 | fp->fa_type = vtonfs_type(vap->va_type); \ | |
220 | fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ | |
221 | fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ | |
222 | fp->fa_uid = txdr_unsigned(vap->va_uid); \ | |
223 | fp->fa_gid = txdr_unsigned(vap->va_gid); \ | |
224 | fp->fa_size = txdr_unsigned(vap->va_size); \ | |
225 | fp->fa_blocksize = txdr_unsigned(vap->va_blocksize); \ | |
d4e5799e KM |
226 | if (vap->va_type == VFIFO) \ |
227 | fp->fa_rdev = 0xffffffff; \ | |
228 | else \ | |
229 | fp->fa_rdev = txdr_unsigned(vap->va_rdev); \ | |
230 | fp->fa_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ | |
66435314 KM |
231 | fp->fa_fsid = txdr_unsigned(vap->va_fsid); \ |
232 | fp->fa_fileid = txdr_unsigned(vap->va_fileid); \ | |
233 | fp->fa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); \ | |
234 | fp->fa_atime.tv_usec = txdr_unsigned(vap->va_flags); \ | |
235 | txdr_time(&vap->va_mtime, &fp->fa_mtime); \ | |
236 | fp->fa_ctime.tv_sec = txdr_unsigned(vap->va_ctime.tv_sec); \ | |
237 | fp->fa_ctime.tv_usec = txdr_unsigned(vap->va_gen) | |
238 |