nfsm_subs.h revision 1.31
1/* $OpenBSD: nfsm_subs.h,v 1.31 2008/06/15 04:03:40 thib Exp $ */ 2/* $NetBSD: nfsm_subs.h,v 1.10 1996/03/20 21:59:56 fvdl Exp $ */ 3 4/* 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Rick Macklem at The University of Guelph. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95 36 */ 37 38 39#ifndef _NFS_NFSM_SUBS_H_ 40#define _NFS_NFSM_SUBS_H_ 41 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)) ? (m)->m_ext.ext_size : \ 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#define nfsm_dissect(a, c, s) \ 71 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 72 if (t1 >= (s)) { \ 73 (a) = (c)(dpos); \ 74 dpos += (s); \ 75 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 76 error = t1; \ 77 m_freem(mrep); \ 78 goto nfsmout; \ 79 } else { \ 80 (a) = (c)cp2; \ 81 } } 82 83#define nfsm_fhtom(v, v3) \ 84 { if (v3) { \ 85 nfsm_strtombuf(&mb, VTONFS(v)->n_fhp, \ 86 VTONFS(v)->n_fhsize); \ 87 } else { \ 88 nfsm_buftombuf(&mb, VTONFS(v)->n_fhp, NFSX_V2FH); \ 89 } } 90 91#define nfsm_srvfhtom(f, v3) \ 92 { if (v3) { \ 93 nfsm_strtombuf(&mb, (f), NFSX_V3FH); \ 94 } else { \ 95 nfsm_buftombuf(&mb, (f), NFSX_V2FH); \ 96 } } 97 98#define nfsm_srvpostop_fh(f) \ 99 { tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 100 *tl++ = nfs_true; \ 101 *tl++ = txdr_unsigned(NFSX_V3FH); \ 102 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 103 } 104 105#define nfsm_mtofh(d, v, v3, f) \ 106 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 107 if (v3) { \ 108 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 109 (f) = fxdr_unsigned(int, *tl); \ 110 } else \ 111 (f) = 1; \ 112 if (f) { \ 113 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 114 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 115 &ttnp)) != 0) { \ 116 error = t1; \ 117 m_freem(mrep); \ 118 goto nfsmout; \ 119 } \ 120 (v) = NFSTOV(ttnp); \ 121 } \ 122 if (v3) { \ 123 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 124 if (f) \ 125 (f) = fxdr_unsigned(int, *tl); \ 126 else if (fxdr_unsigned(int, *tl)) \ 127 nfsm_adv(NFSX_V3FATTR); \ 128 } \ 129 if (f) \ 130 nfsm_loadattr((v), (struct vattr *)0); \ 131 } 132 133#define nfsm_getfh(f, s, v3) \ 134 { if (v3) { \ 135 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 136 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 137 (s) > NFSX_V3FHMAX) { \ 138 m_freem(mrep); \ 139 error = EBADRPC; \ 140 goto nfsmout; \ 141 } \ 142 } else \ 143 (s) = NFSX_V2FH; \ 144 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 145 146#define nfsm_loadattr(v, a) \ 147 { struct vnode *ttvp = (v); \ 148 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 149 error = t1; \ 150 m_freem(mrep); \ 151 goto nfsmout; \ 152 } \ 153 (v) = ttvp; } 154 155#define nfsm_postop_attr(v, f) \ 156 { struct vnode *ttvp = (v); \ 157 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 158 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 159 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 160 (struct vattr *)0)) != 0) { \ 161 error = t1; \ 162 (f) = 0; \ 163 m_freem(mrep); \ 164 goto nfsmout; \ 165 } \ 166 (v) = ttvp; \ 167 } } 168 169/* Used as (f) for nfsm_wcc_data() */ 170#define NFSV3_WCCRATTR 0 171#define NFSV3_WCCCHK 1 172 173#define nfsm_wcc_data(v, f) \ 174 { int ttattrf, ttretf = 0; \ 175 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 176 if (*tl == nfs_true) { \ 177 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 178 if (f) \ 179 ttretf = (VTONFS(v)->n_mtime == \ 180 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 181 } \ 182 nfsm_postop_attr((v), ttattrf); \ 183 if (f) { \ 184 (f) = ttretf; \ 185 } else { \ 186 (f) = ttattrf; \ 187 } } 188 189#define nfsm_strsiz(s,m) \ 190 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 191 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 192 m_freem(mrep); \ 193 error = EBADRPC; \ 194 goto nfsmout; \ 195 } } 196 197#define nfsm_srvstrsiz(s,m) \ 198 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 199 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 200 error = EBADRPC; \ 201 nfsm_reply(0); \ 202 } } 203 204#define nfsm_srvnamesiz(s) \ 205 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 206 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 207 error = NFSERR_NAMETOL; \ 208 if ((s) <= 0) \ 209 error = EBADRPC; \ 210 if (error) \ 211 nfsm_reply(0); \ 212 } 213 214#define nfsm_mtouio(p,s) \ 215 if ((s) > 0 && \ 216 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 217 error = t1; \ 218 m_freem(mrep); \ 219 goto nfsmout; \ 220 } 221 222#define nfsm_rndup(a) (((a)+3)&(~0x3)) 223 224#define nfsm_request(v, t, p, c) \ 225 if ((error = nfs_request((v), mreq, (t), (p), \ 226 (c), &mrep, &md, &dpos)) != 0) { \ 227 if (error & NFSERR_RETERR) \ 228 error &= ~NFSERR_RETERR; \ 229 else \ 230 goto nfsmout; \ 231 } 232 233#define nfsm_strtom(a,s,m) \ 234 if ((s) > (m)) { \ 235 m_freem(mreq); \ 236 error = ENAMETOOLONG; \ 237 goto nfsmout; \ 238 } \ 239 nfsm_strtombuf(&mb, (a), (s)) 240 241#define nfsm_reply(s) \ 242 { \ 243 nfsd->nd_repstat = error; \ 244 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 245 (void) nfs_rephead(0, nfsd, slp, error, \ 246 mrq, &mb); \ 247 else \ 248 (void) nfs_rephead((s), nfsd, slp, error, \ 249 mrq, &mb); \ 250 if (mrep != NULL) { \ 251 m_freem(mrep); \ 252 mrep = NULL; \ 253 } \ 254 mreq = *mrq; \ 255 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 256 error == EBADRPC)) \ 257 return(0); \ 258 } 259 260#define nfsm_writereply(s, v3) \ 261 { \ 262 nfsd->nd_repstat = error; \ 263 if (error && !(v3)) \ 264 (void) nfs_rephead(0, nfsd, slp, error, \ 265 &mreq, &mb); \ 266 else \ 267 (void) nfs_rephead((s), nfsd, slp, error, \ 268 &mreq, &mb); \ 269 } 270 271#define nfsm_adv(s) \ 272 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 273 if (t1 >= (s)) { \ 274 dpos += (s); \ 275 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 276 error = t1; \ 277 m_freem(mrep); \ 278 goto nfsmout; \ 279 } } 280 281#define nfsm_srvmtofh(f) \ 282 { if (nfsd->nd_flag & ND_NFSV3) { \ 283 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 284 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 285 error = EBADRPC; \ 286 nfsm_reply(0); \ 287 } \ 288 } \ 289 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 290 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 291 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 292 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 293 } 294 295#define nfsm_srvsattr(a) \ 296 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 297 if (*tl == nfs_true) { \ 298 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 299 (a)->va_mode = nfstov_mode(*tl); \ 300 } \ 301 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 302 if (*tl == nfs_true) { \ 303 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 304 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 305 } \ 306 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 307 if (*tl == nfs_true) { \ 308 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 309 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 310 } \ 311 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 312 if (*tl == nfs_true) { \ 313 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 314 (a)->va_size = fxdr_hyper(tl); \ 315 } \ 316 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 317 switch (fxdr_unsigned(int, *tl)) { \ 318 case NFSV3SATTRTIME_TOCLIENT: \ 319 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 320 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 321 fxdr_nfsv3time(tl, &(a)->va_atime); \ 322 break; \ 323 case NFSV3SATTRTIME_TOSERVER: \ 324 getnanotime(&(a)->va_atime); \ 325 break; \ 326 }; \ 327 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 328 switch (fxdr_unsigned(int, *tl)) { \ 329 case NFSV3SATTRTIME_TOCLIENT: \ 330 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 331 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 332 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 333 break; \ 334 case NFSV3SATTRTIME_TOSERVER: \ 335 getnanotime(&(a)->va_mtime); \ 336 break; \ 337 }; } 338 339#endif 340