nfsm_subs.h revision 1.4
1/* $OpenBSD: nfsm_subs.h,v 1.4 1996/03/31 13:16:09 mickey 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95 40 */ 41 42 43#ifndef _NFS_NFSM_SUBS_H_ 44#define _NFS_NFSM_SUBS_H_ 45 46 47/* 48 * These macros do strange and peculiar things to mbuf chains for 49 * the assistance of the nfs code. To attempt to use them for any 50 * other purpose will be dangerous. (they make weird assumptions) 51 */ 52 53/* 54 * First define what the actual subs. return 55 */ 56 57#define M_HASCL(m) ((m)->m_flags & M_EXT) 58#define NFSMINOFF(m) \ 59 if (M_HASCL(m)) \ 60 (m)->m_data = (m)->m_ext.ext_buf; \ 61 else if ((m)->m_flags & M_PKTHDR) \ 62 (m)->m_data = (m)->m_pktdat; \ 63 else \ 64 (m)->m_data = (m)->m_dat 65#define NFSMADV(m, s) (m)->m_data += (s) 66#define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ 67 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) 68 69/* 70 * Now for the macros that do the simple stuff and call the functions 71 * for the hard stuff. 72 * These macros use several vars. declared in nfsm_reqhead and these 73 * vars. must not be used elsewhere unless you are careful not to corrupt 74 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 75 * that may be used so long as the value is not expected to retained 76 * after a macro. 77 * I know, this is kind of dorkey, but it makes the actual op functions 78 * fairly clean and deals with the mess caused by the xdr discriminating 79 * unions. 80 */ 81 82#define nfsm_build(a,c,s) \ 83 { if ((s) > M_TRAILINGSPACE(mb)) { \ 84 MGET(mb2, M_WAIT, MT_DATA); \ 85 if ((s) > MLEN) \ 86 panic("build > MLEN"); \ 87 mb->m_next = mb2; \ 88 mb = mb2; \ 89 mb->m_len = 0; \ 90 bpos = mtod(mb, caddr_t); \ 91 } \ 92 (a) = (c)(bpos); \ 93 mb->m_len += (s); \ 94 bpos += (s); } 95 96#define nfsm_dissect(a, c, s) \ 97 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 98 if (t1 >= (s)) { \ 99 (a) = (c)(dpos); \ 100 dpos += (s); \ 101 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 102 error = t1; \ 103 m_freem(mrep); \ 104 goto nfsmout; \ 105 } else { \ 106 (a) = (c)cp2; \ 107 } } 108 109#define nfsm_fhtom(v, v3) \ 110 { if (v3) { \ 111 t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ 112 if (t2 <= M_TRAILINGSPACE(mb)) { \ 113 nfsm_build(tl, u_int32_t *, t2); \ 114 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ 115 *(tl + ((t2>>2) - 2)) = 0; \ 116 bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \ 117 VTONFS(v)->n_fhsize); \ 118 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ 119 (caddr_t)VTONFS(v)->n_fhp, \ 120 VTONFS(v)->n_fhsize)) != 0) { \ 121 error = t2; \ 122 m_freem(mreq); \ 123 goto nfsmout; \ 124 } \ 125 } else { \ 126 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 127 bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \ 128 } } 129 130#define nfsm_srvfhtom(f, v3) \ 131 { if (v3) { \ 132 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH); \ 133 *tl++ = txdr_unsigned(NFSX_V3FH); \ 134 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 135 } else { \ 136 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 137 bcopy((caddr_t)(f), cp, NFSX_V2FH); \ 138 } } 139 140#define nfsm_srvpostop_fh(f) \ 141 { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 142 *tl++ = nfs_true; \ 143 *tl++ = txdr_unsigned(NFSX_V3FH); \ 144 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 145 } 146 147#define nfsm_mtofh(d, v, v3, f) \ 148 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 149 if (v3) { \ 150 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 151 (f) = fxdr_unsigned(int, *tl); \ 152 } else \ 153 (f) = 1; \ 154 if (f) { \ 155 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 156 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 157 &ttnp)) != 0) { \ 158 error = t1; \ 159 m_freem(mrep); \ 160 goto nfsmout; \ 161 } \ 162 (v) = NFSTOV(ttnp); \ 163 } \ 164 if (v3) { \ 165 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 166 if (f) \ 167 (f) = fxdr_unsigned(int, *tl); \ 168 else if (fxdr_unsigned(int, *tl)) \ 169 nfsm_adv(NFSX_V3FATTR); \ 170 } \ 171 if (f) \ 172 nfsm_loadattr((v), (struct vattr *)0); \ 173 } 174 175#define nfsm_getfh(f, s, v3) \ 176 { if (v3) { \ 177 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 178 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 179 (s) > NFSX_V3FHMAX) { \ 180 m_freem(mrep); \ 181 error = EBADRPC; \ 182 goto nfsmout; \ 183 } \ 184 } else \ 185 (s) = NFSX_V2FH; \ 186 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 187 188#define nfsm_loadattr(v, a) \ 189 { struct vnode *ttvp = (v); \ 190 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 191 error = t1; \ 192 m_freem(mrep); \ 193 goto nfsmout; \ 194 } \ 195 (v) = ttvp; } 196 197#define nfsm_postop_attr(v, f) \ 198 { struct vnode *ttvp = (v); \ 199 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 200 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 201 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 202 (struct vattr *)0)) != 0) { \ 203 error = t1; \ 204 (f) = 0; \ 205 m_freem(mrep); \ 206 goto nfsmout; \ 207 } \ 208 (v) = ttvp; \ 209 } } 210 211/* Used as (f) for nfsm_wcc_data() */ 212#define NFSV3_WCCRATTR 0 213#define NFSV3_WCCCHK 1 214 215#define nfsm_wcc_data(v, f) \ 216 { int ttattrf, ttretf = 0; \ 217 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 218 if (*tl == nfs_true) { \ 219 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 220 if (f) \ 221 ttretf = (VTONFS(v)->n_mtime == \ 222 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 223 } \ 224 nfsm_postop_attr((v), ttattrf); \ 225 if (f) { \ 226 (f) = ttretf; \ 227 } else { \ 228 (f) = ttattrf; \ 229 } } 230 231#define nfsm_v3sattr(s, a) \ 232 { (s)->sa_modetrue = nfs_true; \ 233 (s)->sa_mode = vtonfsv3_mode((a)->va_mode); \ 234 (s)->sa_uidfalse = nfs_false; \ 235 (s)->sa_gidfalse = nfs_false; \ 236 (s)->sa_sizefalse = nfs_false; \ 237 (s)->sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 238 txdr_nfsv3time(&(a)->va_atime, &(s)->sa_atime); \ 239 (s)->sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 240 txdr_nfsv3time(&(a)->va_mtime, &(s)->sa_mtime); \ 241 } 242 243#define nfsm_strsiz(s,m) \ 244 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 245 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 246 m_freem(mrep); \ 247 error = EBADRPC; \ 248 goto nfsmout; \ 249 } } 250 251#define nfsm_srvstrsiz(s,m) \ 252 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 253 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 254 error = EBADRPC; \ 255 nfsm_reply(0); \ 256 } } 257 258#define nfsm_srvnamesiz(s) \ 259 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 260 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 261 error = NFSERR_NAMETOL; \ 262 if ((s) <= 0) \ 263 error = EBADRPC; \ 264 if (error) \ 265 nfsm_reply(0); \ 266 } 267 268#define nfsm_mtouio(p,s) \ 269 if ((s) > 0 && \ 270 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 271 error = t1; \ 272 m_freem(mrep); \ 273 goto nfsmout; \ 274 } 275 276#define nfsm_uiotom(p,s) \ 277 if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ 278 error = t1; \ 279 m_freem(mreq); \ 280 goto nfsmout; \ 281 } 282 283#define nfsm_reqhead(v,a,s) \ 284 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 285 286#define nfsm_reqdone m_freem(mrep); \ 287 nfsmout: 288 289#define nfsm_rndup(a) (((a)+3)&(~0x3)) 290 291#define nfsm_request(v, t, p, c) \ 292 if ((error = nfs_request((v), mreq, (t), (p), \ 293 (c), &mrep, &md, &dpos)) != 0) { \ 294 if (error & NFSERR_RETERR) \ 295 error &= ~NFSERR_RETERR; \ 296 else \ 297 goto nfsmout; \ 298 } 299 300#define nfsm_strtom(a,s,m) \ 301 if ((s) > (m)) { \ 302 m_freem(mreq); \ 303 error = ENAMETOOLONG; \ 304 goto nfsmout; \ 305 } \ 306 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 307 if (t2 <= M_TRAILINGSPACE(mb)) { \ 308 nfsm_build(tl,u_int32_t *,t2); \ 309 *tl++ = txdr_unsigned(s); \ 310 *(tl+((t2>>2)-2)) = 0; \ 311 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 312 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 313 error = t2; \ 314 m_freem(mreq); \ 315 goto nfsmout; \ 316 } 317 318#define nfsm_srvdone \ 319 nfsmout: \ 320 return(error) 321 322#define nfsm_reply(s) \ 323 { \ 324 nfsd->nd_repstat = error; \ 325 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 326 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 327 mrq, &mb, &bpos); \ 328 else \ 329 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 330 mrq, &mb, &bpos); \ 331 if (mrep != NULL) { \ 332 m_freem(mrep); \ 333 mrep = NULL; \ 334 } \ 335 mreq = *mrq; \ 336 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 337 error == EBADRPC)) \ 338 return(0); \ 339 } 340 341#define nfsm_writereply(s, v3) \ 342 { \ 343 nfsd->nd_repstat = error; \ 344 if (error && !(v3)) \ 345 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 346 &mreq, &mb, &bpos); \ 347 else \ 348 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 349 &mreq, &mb, &bpos); \ 350 } 351 352#define nfsm_adv(s) \ 353 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 354 if (t1 >= (s)) { \ 355 dpos += (s); \ 356 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 357 error = t1; \ 358 m_freem(mrep); \ 359 goto nfsmout; \ 360 } } 361 362#define nfsm_srvmtofh(f) \ 363 { if (nfsd->nd_flag & ND_NFSV3) { \ 364 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 365 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 366 error = EBADRPC; \ 367 nfsm_reply(0); \ 368 } \ 369 } \ 370 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 371 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 372 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 373 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 374 } 375 376#define nfsm_clget \ 377 if (bp >= be) { \ 378 if (mp == mb) \ 379 mp->m_len += bp-bpos; \ 380 MGET(mp, M_WAIT, MT_DATA); \ 381 MCLGET(mp, M_WAIT); \ 382 mp->m_len = NFSMSIZ(mp); \ 383 mp2->m_next = mp; \ 384 mp2 = mp; \ 385 bp = mtod(mp, caddr_t); \ 386 be = bp+mp->m_len; \ 387 } \ 388 tl = (u_int32_t *)bp 389 390#define nfsm_srvfillattr(a, f) \ 391 nfsm_srvfattr(nfsd, (a), (f)) 392 393#define nfsm_srvwcc_data(br, b, ar, a) \ 394 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 395 396#define nfsm_srvpostop_attr(r, a) \ 397 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 398 399#define nfsm_srvsattr(a) \ 400 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 401 if (*tl == nfs_true) { \ 402 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 403 (a)->va_mode = nfstov_mode(*tl); \ 404 } \ 405 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 406 if (*tl == nfs_true) { \ 407 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 408 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 409 } \ 410 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 411 if (*tl == nfs_true) { \ 412 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 413 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 414 } \ 415 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 416 if (*tl == nfs_true) { \ 417 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 418 fxdr_hyper(tl, &(a)->va_size); \ 419 } \ 420 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 421 switch (fxdr_unsigned(int, *tl)) { \ 422 case NFSV3SATTRTIME_TOCLIENT: \ 423 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 424 fxdr_nfsv3time(tl, &(a)->va_atime); \ 425 break; \ 426 case NFSV3SATTRTIME_TOSERVER: \ 427 (a)->va_atime.tv_sec = time.tv_sec; \ 428 (a)->va_atime.tv_nsec = time.tv_usec * 1000; \ 429 break; \ 430 }; \ 431 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 432 switch (fxdr_unsigned(int, *tl)) { \ 433 case NFSV3SATTRTIME_TOCLIENT: \ 434 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 435 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 436 break; \ 437 case NFSV3SATTRTIME_TOSERVER: \ 438 (a)->va_mtime.tv_sec = time.tv_sec; \ 439 (a)->va_mtime.tv_nsec = time.tv_usec * 1000; \ 440 break; \ 441 }; } 442 443#endif 444