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1.1 root 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: *
8: * Redistribution is only permitted until one year after the first shipment
9: * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and
10: * binary forms are permitted provided that: (1) source distributions retain
11: * this entire copyright notice and comment, and (2) distributions including
12: * binaries display the following acknowledgement: This product includes
13: * software developed by the University of California, Berkeley and its
14: * contributors'' in the documentation or other materials provided with the
15: * distribution and in all advertising materials mentioning features or use
16: * of this software. Neither the name of the University nor the names of
17: * its contributors may be used to endorse or promote products derived from
18: * this software without specific prior written permission.
19: * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
20: * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
21: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
22: *
23: * @(#)nfsm_subs.h 7.10 (Berkeley) 6/28/90
24: */
25:
26: /*
27: * These macros do strange and peculiar things to mbuf chains for
28: * the assistance of the nfs code. To attempt to use them for any
29: * other purpose will be dangerous. (they make weird assumptions)
30: */
31:
32: /*
33: * First define what the actual subs. return
34: */
35: extern struct mbuf *nfsm_reqh();
36:
37: #define M_HASCL(m) ((m)->m_flags & M_EXT)
38: #define NFSMGETHDR(m) \
39: MGETHDR(m, M_WAIT, MT_DATA); \
40: (m)->m_pkthdr.len = 0; \
41: (m)->m_pkthdr.rcvif = (struct ifnet *)0
42: #define NFSMINOFF(m) \
43: if (M_HASCL(m)) \
44: (m)->m_data = (m)->m_ext.ext_buf; \
45: else \
46: (m)->m_data = (m)->m_dat
47: #define NFSMADV(m, s) (m)->m_data += (s)
48: #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
49: (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
50:
51: /*
52: * Now for the macros that do the simple stuff and call the functions
53: * for the hard stuff.
54: * These macros use several vars. declared in nfsm_reqhead and these
55: * vars. must not be used elsewhere unless you are careful not to corrupt
56: * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
57: * that may be used so long as the value is not expected to retained
58: * after a macro.
59: * I know, this is kind of dorkey, but it makes the actual op functions
60: * fairly clean and deals with the mess caused by the xdr discriminating
61: * unions.
62: */
63:
64: #ifndef lint
65: #define nfsm_build(a,c,s) \
66: t1 = NFSMSIZ(mb); \
67: if ((s) > (t1-mb->m_len)) { \
68: MGET(mb2, M_WAIT, MT_DATA); \
69: if ((s) > MLEN) \
70: panic("build > MLEN"); \
71: mb->m_next = mb2; \
72: mb = mb2; \
73: mb->m_len = 0; \
74: bpos = mtod(mb, caddr_t); \
75: } \
76: (a) = (c)(bpos); \
77: mb->m_len += (s); \
78: bpos += (s)
79: #else /* lint */
80: #define nfsm_build(a,c,s) \
81: t1 = NFSMSIZ(mb); \
82: if ((s) > (t1-mb->m_len)) { \
83: MGET(mb2, M_WAIT, MT_DATA); \
84: mb->m_next = mb2; \
85: mb = mb2; \
86: mb->m_len = 0; \
87: bpos = mtod(mb, caddr_t); \
88: } \
89: (a) = (c)(bpos); \
90: mb->m_len += (s); \
91: bpos += (s)
92: #endif /* lint */
93:
94: #define nfsm_disect(a,c,s) \
95: t1 = mtod(md, caddr_t)+md->m_len-dpos; \
96: if (t1 >= (s)) { \
97: (a) = (c)(dpos); \
98: dpos += (s); \
99: } else if (error = nfsm_disct(&md, &dpos, (s), t1, TRUE, &cp2)) { \
100: m_freem(mrep); \
101: goto nfsmout; \
102: } else { \
103: (a) = (c)cp2; \
104: }
105:
106: #define nfsm_disecton(a,c,s) \
107: t1 = mtod(md, caddr_t)+md->m_len-dpos; \
108: if (t1 >= (s)) { \
109: (a) = (c)(dpos); \
110: dpos += (s); \
111: } else if (error = nfsm_disct(&md, &dpos, (s), t1, FALSE, &cp2)) { \
112: m_freem(mrep); \
113: goto nfsmout; \
114: } else { \
115: (a) = (c)cp2; \
116: }
117:
118: #define nfsm_fhtom(v) \
119: nfsm_build(cp,caddr_t,NFSX_FH); \
120: bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH)
121:
122: #define nfsm_srvfhtom(f) \
123: nfsm_build(cp,caddr_t,NFSX_FH); \
124: bcopy((caddr_t)(f), cp, NFSX_FH)
125:
126: #define nfsm_mtofh(d,v) \
127: { struct nfsnode *np; nfsv2fh_t *fhp; \
128: nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); \
129: if (error = nfs_nget((d)->v_mount, fhp, &np)) { \
130: m_freem(mrep); \
131: goto nfsmout; \
132: } \
133: (v) = NFSTOV(np); \
134: nfsm_loadattr(v, (struct vattr *)0); \
135: }
136:
137: #define nfsm_loadattr(v,a) \
138: { struct vnode *tvp = (v); \
139: if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \
140: m_freem(mrep); \
141: goto nfsmout; \
142: } \
143: (v) = tvp; }
144:
145: #define nfsm_strsiz(s,m) \
146: nfsm_disect(p,u_long *,NFSX_UNSIGNED); \
147: if (((s) = fxdr_unsigned(long,*p)) > (m)) { \
148: m_freem(mrep); \
149: error = EBADRPC; \
150: goto nfsmout; \
151: }
152:
153: #define nfsm_srvstrsiz(s,m) \
154: nfsm_disect(p,u_long *,NFSX_UNSIGNED); \
155: if (((s) = fxdr_unsigned(long,*p)) > (m) || (s) <= 0) { \
156: error = EBADRPC; \
157: nfsm_reply(0); \
158: }
159:
160: #define nfsm_mtouio(p,s) \
161: if ((s) > 0 && \
162: (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \
163: m_freem(mrep); \
164: goto nfsmout; \
165: }
166:
167: #define nfsm_uiotom(p,s) \
168: if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \
169: m_freem(mreq); \
170: goto nfsmout; \
171: }
172:
173: #define nfsm_reqhead(a,c,s) \
174: if ((mreq = nfsm_reqh(nfs_prog,nfs_vers,(a),(c),(s),&bpos,&mb,&xid)) == NULL) { \
175: error = ENOBUFS; \
176: goto nfsmout; \
177: }
178:
179: #define nfsm_reqdone m_freem(mrep); \
180: nfsmout:
181:
182: #define nfsm_rndup(a) (((a)+3)&(~0x3))
183:
184: #define nfsm_request(v, t, p, h) \
185: if (error = nfs_request((v), mreq, xid, (t), (p), (h), \
186: (v)->v_mount, &mrep, &md, &dpos)) \
187: goto nfsmout
188:
189: #define nfsm_strtom(a,s,m) \
190: if ((s) > (m)) { \
191: m_freem(mreq); \
192: error = ENAMETOOLONG; \
193: goto nfsmout; \
194: } \
195: t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \
196: if(t2<=(NFSMSIZ(mb)-mb->m_len)){ \
197: nfsm_build(p,u_long *,t2); \
198: *p++ = txdr_unsigned(s); \
199: *(p+((t2>>2)-2)) = 0; \
200: bcopy((caddr_t)(a), (caddr_t)p, (s)); \
201: } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \
202: m_freem(mreq); \
203: goto nfsmout; \
204: }
205:
206: #define nfsm_srvdone \
207: nfsmout: \
208: return(error)
209:
210: #ifndef lint
211: #define nfsm_reply(s) \
212: { \
213: *repstat = error; \
214: if (error) \
215: nfs_rephead(0, xid, error, mrq, &mb, &bpos); \
216: else \
217: nfs_rephead((s), xid, error, mrq, &mb, &bpos); \
218: m_freem(mrep); \
219: mreq = *mrq; \
220: if (error) \
221: return(0); \
222: }
223: #else /* lint */
224: #define nfsm_reply(s) \
225: { \
226: *repstat = error; \
227: if (error) \
228: nfs_rephead(0, xid, error, mrq, &mb, &bpos); \
229: else \
230: nfs_rephead((s), xid, error, mrq, &mb, &bpos); \
231: m_freem(mrep); \
232: mreq = *mrq; \
233: mrep = mreq; \
234: if (error) \
235: return(0); \
236: }
237: #endif /* lint */
238:
239: #define nfsm_adv(s) \
240: t1 = mtod(md, caddr_t)+md->m_len-dpos; \
241: if (t1 >= (s)) { \
242: dpos += (s); \
243: } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \
244: m_freem(mrep); \
245: goto nfsmout; \
246: }
247:
248: #define nfsm_srvmtofh(f) \
249: nfsm_disecton(p, u_long *, NFSX_FH); \
250: bcopy((caddr_t)p, (caddr_t)f, NFSX_FH)
251:
252: #define nfsm_clget \
253: if (bp >= be) { \
254: MGET(mp, M_WAIT, MT_DATA); \
255: MCLGET(mp, M_WAIT); \
256: mp->m_len = NFSMSIZ(mp); \
257: if (mp3 == NULL) \
258: mp3 = mp2 = mp; \
259: else { \
260: mp2->m_next = mp; \
261: mp2 = mp; \
262: } \
263: bp = mtod(mp, caddr_t); \
264: be = bp+mp->m_len; \
265: } \
266: p = (u_long *)bp
267:
268: #define nfsm_srvfillattr \
269: fp->fa_type = vtonfs_type(vap->va_type); \
270: fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \
271: fp->fa_nlink = txdr_unsigned(vap->va_nlink); \
272: fp->fa_uid = txdr_unsigned(vap->va_uid); \
273: fp->fa_gid = txdr_unsigned(vap->va_gid); \
274: fp->fa_size = txdr_unsigned(vap->va_size); \
275: fp->fa_blocksize = txdr_unsigned(vap->va_blocksize); \
276: if (vap->va_type == VFIFO) \
277: fp->fa_rdev = 0xffffffff; \
278: else \
279: fp->fa_rdev = txdr_unsigned(vap->va_rdev); \
280: fp->fa_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \
281: fp->fa_fsid = txdr_unsigned(vap->va_fsid); \
282: fp->fa_fileid = txdr_unsigned(vap->va_fileid); \
283: fp->fa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); \
284: fp->fa_atime.tv_usec = txdr_unsigned(vap->va_flags); \
285: txdr_time(&vap->va_mtime, &fp->fa_mtime); \
286: fp->fa_ctime.tv_sec = txdr_unsigned(vap->va_ctime.tv_sec); \
287: fp->fa_ctime.tv_usec = txdr_unsigned(vap->va_gen)
288:
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