nfsm_subs.h revision 1.10
1/* $OpenBSD: nfsm_subs.h,v 1.10 1999/02/06 23:07:47 millert 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/* If full is true, set all fields, otherwise just set mode and time fields */ 232#define nfsm_v3attrbuild(a, full) \ 233 { if ((a)->va_mode != (mode_t)VNOVAL) { \ 234 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 235 *tl++ = nfs_true; \ 236 *tl = txdr_unsigned((a)->va_mode); \ 237 } else { \ 238 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 239 *tl = nfs_false; \ 240 } \ 241 if ((full) && (a)->va_uid != (uid_t)VNOVAL) { \ 242 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 243 *tl++ = nfs_true; \ 244 *tl = txdr_unsigned((a)->va_uid); \ 245 } else { \ 246 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 247 *tl = nfs_false; \ 248 } \ 249 if ((full) && (a)->va_gid != (gid_t)VNOVAL) { \ 250 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 251 *tl++ = nfs_true; \ 252 *tl = txdr_unsigned((a)->va_gid); \ 253 } else { \ 254 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 255 *tl = nfs_false; \ 256 } \ 257 if ((full) && (a)->va_size != VNOVAL) { \ 258 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 259 *tl++ = nfs_true; \ 260 txdr_hyper((a)->va_size, tl); \ 261 } else { \ 262 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 263 *tl = nfs_false; \ 264 } \ 265 if ((a)->va_atime.tv_sec != VNOVAL) { \ 266 if ((a)->va_atime.tv_sec != time.tv_sec) { \ 267 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 268 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 269 txdr_nfsv3time(&(a)->va_atime, tl); \ 270 } else { \ 271 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 272 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ 273 } \ 274 } else { \ 275 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 276 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ 277 } \ 278 if ((a)->va_mtime.tv_sec != VNOVAL) { \ 279 if ((a)->va_mtime.tv_sec != time.tv_sec) { \ 280 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 281 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 282 txdr_nfsv3time(&(a)->va_mtime, tl); \ 283 } else { \ 284 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 285 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ 286 } \ 287 } else { \ 288 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 289 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ 290 } \ 291 } 292 293 294#define nfsm_strsiz(s,m) \ 295 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 296 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 297 m_freem(mrep); \ 298 error = EBADRPC; \ 299 goto nfsmout; \ 300 } } 301 302#define nfsm_srvstrsiz(s,m) \ 303 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 304 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 305 error = EBADRPC; \ 306 nfsm_reply(0); \ 307 } } 308 309#define nfsm_srvnamesiz(s) \ 310 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 311 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 312 error = NFSERR_NAMETOL; \ 313 if ((s) <= 0) \ 314 error = EBADRPC; \ 315 if (error) \ 316 nfsm_reply(0); \ 317 } 318 319#define nfsm_mtouio(p,s) \ 320 if ((s) > 0 && \ 321 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 322 error = t1; \ 323 m_freem(mrep); \ 324 goto nfsmout; \ 325 } 326 327#define nfsm_uiotom(p,s) \ 328 if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ 329 error = t1; \ 330 m_freem(mreq); \ 331 goto nfsmout; \ 332 } 333 334#define nfsm_reqhead(v,a,s) \ 335 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 336 337#define nfsm_reqdone m_freem(mrep); \ 338 nfsmout: 339 340#define nfsm_rndup(a) (((a)+3)&(~0x3)) 341 342#define nfsm_request(v, t, p, c) \ 343 if ((error = nfs_request((v), mreq, (t), (p), \ 344 (c), &mrep, &md, &dpos)) != 0) { \ 345 if (error & NFSERR_RETERR) \ 346 error &= ~NFSERR_RETERR; \ 347 else \ 348 goto nfsmout; \ 349 } 350 351#define nfsm_strtom(a,s,m) \ 352 if ((s) > (m)) { \ 353 m_freem(mreq); \ 354 error = ENAMETOOLONG; \ 355 goto nfsmout; \ 356 } \ 357 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 358 if (t2 <= M_TRAILINGSPACE(mb)) { \ 359 nfsm_build(tl,u_int32_t *,t2); \ 360 *tl++ = txdr_unsigned(s); \ 361 *(tl+((t2>>2)-2)) = 0; \ 362 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 363 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 364 error = t2; \ 365 m_freem(mreq); \ 366 goto nfsmout; \ 367 } 368 369#define nfsm_srvdone \ 370 nfsmout: \ 371 return(error) 372 373#define nfsm_reply(s) \ 374 { \ 375 nfsd->nd_repstat = error; \ 376 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 377 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 378 mrq, &mb, &bpos); \ 379 else \ 380 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 381 mrq, &mb, &bpos); \ 382 if (mrep != NULL) { \ 383 m_freem(mrep); \ 384 mrep = NULL; \ 385 } \ 386 mreq = *mrq; \ 387 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 388 error == EBADRPC)) \ 389 return(0); \ 390 } 391 392#define nfsm_writereply(s, v3) \ 393 { \ 394 nfsd->nd_repstat = error; \ 395 if (error && !(v3)) \ 396 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 397 &mreq, &mb, &bpos); \ 398 else \ 399 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 400 &mreq, &mb, &bpos); \ 401 } 402 403#define nfsm_adv(s) \ 404 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 405 if (t1 >= (s)) { \ 406 dpos += (s); \ 407 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 408 error = t1; \ 409 m_freem(mrep); \ 410 goto nfsmout; \ 411 } } 412 413#define nfsm_srvmtofh(f) \ 414 { if (nfsd->nd_flag & ND_NFSV3) { \ 415 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 416 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 417 error = EBADRPC; \ 418 nfsm_reply(0); \ 419 } \ 420 } \ 421 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 422 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 423 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 424 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 425 } 426 427#define nfsm_clget \ 428 if (bp >= be) { \ 429 if (mp == mb) \ 430 mp->m_len += bp-bpos; \ 431 MGET(mp, M_WAIT, MT_DATA); \ 432 MCLGET(mp, M_WAIT); \ 433 mp->m_len = NFSMSIZ(mp); \ 434 mp2->m_next = mp; \ 435 mp2 = mp; \ 436 bp = mtod(mp, caddr_t); \ 437 be = bp+mp->m_len; \ 438 } \ 439 tl = (u_int32_t *)bp 440 441#define nfsm_srvfillattr(a, f) \ 442 nfsm_srvfattr(nfsd, (a), (f)) 443 444#define nfsm_srvwcc_data(br, b, ar, a) \ 445 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 446 447#define nfsm_srvpostop_attr(r, a) \ 448 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 449 450#define nfsm_srvsattr(a) \ 451 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 452 if (*tl == nfs_true) { \ 453 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 454 (a)->va_mode = nfstov_mode(*tl); \ 455 } \ 456 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 457 if (*tl == nfs_true) { \ 458 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 459 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 460 } \ 461 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 462 if (*tl == nfs_true) { \ 463 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 464 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 465 } \ 466 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 467 if (*tl == nfs_true) { \ 468 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 469 (a)->va_size = fxdr_hyper(tl); \ 470 } \ 471 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 472 switch (fxdr_unsigned(int, *tl)) { \ 473 case NFSV3SATTRTIME_TOCLIENT: \ 474 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 475 fxdr_nfsv3time(tl, &(a)->va_atime); \ 476 break; \ 477 case NFSV3SATTRTIME_TOSERVER: \ 478 (a)->va_atime.tv_sec = time.tv_sec; \ 479 (a)->va_atime.tv_nsec = time.tv_usec * 1000; \ 480 break; \ 481 }; \ 482 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 483 switch (fxdr_unsigned(int, *tl)) { \ 484 case NFSV3SATTRTIME_TOCLIENT: \ 485 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 486 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 487 break; \ 488 case NFSV3SATTRTIME_TOSERVER: \ 489 (a)->va_mtime.tv_sec = time.tv_sec; \ 490 (a)->va_mtime.tv_nsec = time.tv_usec * 1000; \ 491 break; \ 492 }; } 493 494#endif 495