nfsm_subs.h revision 1.32
1 /* $NetBSD: nfsm_subs.h,v 1.32 2003/09/26 11:51:53 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95 35 */ 36 37 38 #ifndef _NFS_NFSM_SUBS_H_ 39 #define _NFS_NFSM_SUBS_H_ 40 41 42 /* 43 * These macros do strange and peculiar things to mbuf chains for 44 * the assistance of the nfs code. To attempt to use them for any 45 * other purpose will be dangerous. (they make weird assumptions) 46 */ 47 48 /* 49 * First define what the actual subs. return 50 */ 51 52 #define M_HASCL(m) ((m)->m_flags & M_EXT) 53 #define NFSMINOFF(m) \ 54 if (M_HASCL(m)) \ 55 (m)->m_data = (m)->m_ext.ext_buf; \ 56 else if ((m)->m_flags & M_PKTHDR) \ 57 (m)->m_data = (m)->m_pktdat; \ 58 else \ 59 (m)->m_data = (m)->m_dat 60 #define NFSMADV(m, s) (m)->m_data += (s) 61 #define NFSMSIZ(m) ((M_HASCL(m)) ? (m)->m_ext.ext_size : \ 62 (((m)->m_flags & M_PKTHDR) ? MHLEN : MLEN)) 63 64 /* 65 * Now for the macros that do the simple stuff and call the functions 66 * for the hard stuff. 67 * These macros use several vars. declared in nfsm_reqhead and these 68 * vars. must not be used elsewhere unless you are careful not to corrupt 69 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 70 * that may be used so long as the value is not expected to retained 71 * after a macro. 72 * I know, this is kind of dorkey, but it makes the actual op functions 73 * fairly clean and deals with the mess caused by the xdr discriminating 74 * unions. 75 */ 76 77 #define nfsm_build(a,c,s) \ 78 { if ((s) > M_TRAILINGSPACE(mb)) { \ 79 struct mbuf *mb2; \ 80 mb2 = m_get(M_WAIT, MT_DATA); \ 81 MCLAIM(mb2, &nfs_mowner); \ 82 if ((s) > MLEN) \ 83 panic("build > MLEN"); \ 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 93 #define nfsm_aligned(p) ALIGNED_POINTER(p,u_int32_t) 94 95 #define nfsm_dissect(a, c, s) \ 96 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 97 if (t1 >= (s) && nfsm_aligned(dpos)) { \ 98 (a) = (c)(dpos); \ 99 dpos += (s); \ 100 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 101 error = t1; \ 102 m_freem(mrep); \ 103 goto nfsmout; \ 104 } else { \ 105 (a) = (c)cp2; \ 106 } } 107 108 #define nfsm_fhtom(n, v3) \ 109 { if (v3) { \ 110 t2 = nfsm_rndup((n)->n_fhsize) + NFSX_UNSIGNED; \ 111 if (t2 <= M_TRAILINGSPACE(mb)) { \ 112 nfsm_build(tl, u_int32_t *, t2); \ 113 *tl++ = txdr_unsigned((n)->n_fhsize); \ 114 *(tl + ((t2>>2) - 2)) = 0; \ 115 memcpy((caddr_t)tl,(caddr_t)(n)->n_fhp, \ 116 (n)->n_fhsize); \ 117 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ 118 (caddr_t)(n)->n_fhp, \ 119 (n)->n_fhsize)) != 0) { \ 120 error = t2; \ 121 m_freem(mreq); \ 122 goto nfsmout; \ 123 } \ 124 } else { \ 125 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 126 memcpy(cp, (caddr_t)(n)->n_fhp, NFSX_V2FH); \ 127 } } 128 129 #define nfsm_srvfhtom(f, v3) \ 130 { if (v3) { \ 131 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH); \ 132 *tl++ = txdr_unsigned(NFSX_V3FH); \ 133 memcpy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 134 } else { \ 135 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 136 memcpy(cp, (caddr_t)(f), NFSX_V2FH); \ 137 } } 138 139 #define nfsm_srvpostop_fh(f) \ 140 { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 141 *tl++ = nfs_true; \ 142 *tl++ = txdr_unsigned(NFSX_V3FH); \ 143 memcpy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 144 } 145 146 #define nfsm_mtofh(d, v, v3, f) \ 147 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 148 if (v3) { \ 149 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 150 (f) = fxdr_unsigned(int, *tl); \ 151 } else \ 152 (f) = 1; \ 153 if (f) { \ 154 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 155 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 156 &ttnp)) != 0) { \ 157 error = t1; \ 158 m_freem(mrep); \ 159 goto nfsmout; \ 160 } \ 161 (v) = NFSTOV(ttnp); \ 162 } \ 163 if (v3) { \ 164 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 165 if (f) \ 166 (f) = fxdr_unsigned(int, *tl); \ 167 else if (fxdr_unsigned(int, *tl)) \ 168 nfsm_adv(NFSX_V3FATTR); \ 169 } \ 170 if (f) \ 171 nfsm_loadattr((v), (struct vattr *)0, 0); \ 172 } 173 174 #define nfsm_getfh(f, s, v3) \ 175 { if (v3) { \ 176 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 177 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 178 (s) > NFSX_V3FHMAX) { \ 179 m_freem(mrep); \ 180 error = EBADRPC; \ 181 goto nfsmout; \ 182 } \ 183 } else \ 184 (s) = NFSX_V2FH; \ 185 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 186 187 #define nfsm_loadattr(v, a, flags) \ 188 { struct vnode *ttvp = (v); \ 189 if ((t1 = nfsm_loadattrcache(&ttvp, &md, &dpos, (a), (flags))) \ 190 != 0) { \ 191 error = t1; \ 192 m_freem(mrep); \ 193 goto nfsmout; \ 194 } \ 195 (v) = ttvp; } 196 197 #define nfsm_postop_attr(v, f, flags) \ 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 = nfsm_loadattrcache(&ttvp, &md, &dpos, \ 202 (struct vattr *)0, (flags))) != 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, flags) \ 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 struct timespec mtime; \ 222 fxdr_nfsv3time(tl + 2, &mtime); \ 223 ttretf = timespeccmp(&VTONFS(v)->n_mtime, \ 224 &mtime, ==); \ 225 } \ 226 } \ 227 nfsm_postop_attr((v), ttattrf, (flags)); \ 228 if (f) { \ 229 (f) = ttretf; \ 230 } else { \ 231 (f) = ttattrf; \ 232 } } 233 234 /* If full is true, set all fields, otherwise just set mode and time fields */ 235 #define nfsm_v3attrbuild(a, full) \ 236 { if ((a)->va_mode != (mode_t)VNOVAL) { \ 237 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 238 *tl++ = nfs_true; \ 239 *tl = txdr_unsigned((a)->va_mode); \ 240 } else { \ 241 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 242 *tl = nfs_false; \ 243 } \ 244 if ((full) && (a)->va_uid != (uid_t)VNOVAL) { \ 245 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 246 *tl++ = nfs_true; \ 247 *tl = txdr_unsigned((a)->va_uid); \ 248 } else { \ 249 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 250 *tl = nfs_false; \ 251 } \ 252 if ((full) && (a)->va_gid != (gid_t)VNOVAL) { \ 253 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 254 *tl++ = nfs_true; \ 255 *tl = txdr_unsigned((a)->va_gid); \ 256 } else { \ 257 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 258 *tl = nfs_false; \ 259 } \ 260 if ((full) && (a)->va_size != VNOVAL) { \ 261 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 262 *tl++ = nfs_true; \ 263 txdr_hyper((a)->va_size, tl); \ 264 } else { \ 265 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 266 *tl = nfs_false; \ 267 } \ 268 if ((a)->va_atime.tv_sec != VNOVAL) { \ 269 if ((a)->va_atime.tv_sec != time.tv_sec) { \ 270 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 271 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 272 txdr_nfsv3time(&(a)->va_atime, tl); \ 273 } else { \ 274 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 275 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ 276 } \ 277 } else { \ 278 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 279 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ 280 } \ 281 if ((a)->va_mtime.tv_sec != VNOVAL) { \ 282 if ((a)->va_mtime.tv_sec != time.tv_sec) { \ 283 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 284 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 285 txdr_nfsv3time(&(a)->va_mtime, tl); \ 286 } else { \ 287 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 288 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ 289 } \ 290 } else { \ 291 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 292 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ 293 } \ 294 } 295 296 297 #define nfsm_strsiz(s,m) \ 298 { nfsm_dissect(tl,uint32_t *,NFSX_UNSIGNED); \ 299 if (((s) = fxdr_unsigned(uint32_t,*tl)) > (m)) { \ 300 m_freem(mrep); \ 301 error = EBADRPC; \ 302 goto nfsmout; \ 303 } } 304 305 #define nfsm_srvnamesiz(s) \ 306 { nfsm_dissect(tl,uint32_t *,NFSX_UNSIGNED); \ 307 if (((s) = fxdr_unsigned(uint32_t,*tl)) > NFS_MAXNAMLEN) \ 308 error = NFSERR_NAMETOL; \ 309 if (error) \ 310 nfsm_reply(0); \ 311 } 312 313 #define nfsm_mtouio(p,s) \ 314 if ((s) > 0 && \ 315 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 316 error = t1; \ 317 m_freem(mrep); \ 318 goto nfsmout; \ 319 } 320 321 #define nfsm_uiotom(p,s) \ 322 if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ 323 error = t1; \ 324 m_freem(mreq); \ 325 goto nfsmout; \ 326 } 327 328 #define nfsm_reqhead(n,a,s) \ 329 mb = mreq = nfsm_reqh((n),(a),(s),&bpos) 330 331 #define nfsm_reqdone m_freem(mrep); \ 332 nfsmout: 333 334 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 335 #define nfsm_padlen(a) (nfsm_rndup(a) - (a)) 336 337 #define nfsm_request(v, t, p, c) \ 338 if ((error = nfs_request((v), mreq, (t), (p), \ 339 (c), &mrep, &md, &dpos)) != 0) { \ 340 if (error & NFSERR_RETERR) \ 341 error &= ~NFSERR_RETERR; \ 342 else \ 343 goto nfsmout; \ 344 } 345 346 #define nfsm_strtom(a,s,m) \ 347 if ((s) > (m)) { \ 348 m_freem(mreq); \ 349 error = ENAMETOOLONG; \ 350 goto nfsmout; \ 351 } \ 352 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 353 if (t2 <= M_TRAILINGSPACE(mb)) { \ 354 nfsm_build(tl,u_int32_t *,t2); \ 355 *tl++ = txdr_unsigned(s); \ 356 *(tl+((t2>>2)-2)) = 0; \ 357 memcpy((caddr_t)tl, (const char *)(a), (s)); \ 358 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 359 error = t2; \ 360 m_freem(mreq); \ 361 goto nfsmout; \ 362 } 363 364 #define nfsm_srvdone \ 365 nfsmout: \ 366 return(error) 367 368 #define nfsm_reply(s) \ 369 { \ 370 nfsd->nd_repstat = error; \ 371 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 372 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 373 mrq, &mb, &bpos); \ 374 else \ 375 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 376 mrq, &mb, &bpos); \ 377 if (mrep != NULL) { \ 378 m_freem(mrep); \ 379 mrep = NULL; \ 380 } \ 381 mreq = *mrq; \ 382 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 383 error == EBADRPC)) \ 384 return(0); \ 385 } 386 387 #define nfsm_writereply(s, v3) \ 388 { \ 389 nfsd->nd_repstat = error; \ 390 if (error && !(v3)) \ 391 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 392 &mreq, &mb, &bpos); \ 393 else \ 394 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 395 &mreq, &mb, &bpos); \ 396 } 397 398 #define nfsm_adv(s) \ 399 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 400 if (t1 >= (s)) { \ 401 dpos += (s); \ 402 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 403 error = t1; \ 404 m_freem(mrep); \ 405 goto nfsmout; \ 406 } } 407 408 #define nfsm_srvmtofh(f) \ 409 { int fhlen = NFSX_V3FH; \ 410 if (nfsd->nd_flag & ND_NFSV3) { \ 411 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 412 fhlen = fxdr_unsigned(int, *tl); \ 413 if (fhlen == 0) { \ 414 memset((caddr_t)(f), 0, NFSX_V3FH); \ 415 } else if (fhlen != NFSX_V3FH) { \ 416 error = EBADRPC; \ 417 nfsm_reply(0); \ 418 } \ 419 } \ 420 if (fhlen != 0) { \ 421 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 422 memcpy( (caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 423 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 424 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 425 } \ 426 } 427 428 #define nfsm_clget \ 429 if (bp >= be) { \ 430 if (mp == mb) \ 431 mp->m_len += bp-bpos; \ 432 mp = m_get(M_WAIT, MT_DATA); \ 433 MCLAIM(mp, &nfs_mowner); \ 434 m_clget(mp, M_WAIT); \ 435 mp->m_len = NFSMSIZ(mp); \ 436 mp2->m_next = mp; \ 437 mp2 = mp; \ 438 bp = mtod(mp, caddr_t); \ 439 be = bp+mp->m_len; \ 440 } \ 441 tl = (u_int32_t *)bp 442 443 #define nfsm_srvfillattr(a, f) \ 444 nfsm_srvfattr(nfsd, (a), (f)) 445 446 #define nfsm_srvwcc_data(br, b, ar, a) \ 447 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 448 449 #define nfsm_srvpostop_attr(r, a) \ 450 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 451 452 #define nfsm_srvsattr(a) \ 453 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 454 if (*tl == nfs_true) { \ 455 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 456 (a)->va_mode = nfstov_mode(*tl); \ 457 } \ 458 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 459 if (*tl == nfs_true) { \ 460 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 461 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 462 } \ 463 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 464 if (*tl == nfs_true) { \ 465 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 466 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 467 } \ 468 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 469 if (*tl == nfs_true) { \ 470 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 471 (a)->va_size = fxdr_hyper(tl); \ 472 } \ 473 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 474 switch (fxdr_unsigned(int, *tl)) { \ 475 case NFSV3SATTRTIME_TOCLIENT: \ 476 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 477 fxdr_nfsv3time(tl, &(a)->va_atime); \ 478 break; \ 479 case NFSV3SATTRTIME_TOSERVER: \ 480 (a)->va_atime.tv_sec = time.tv_sec; \ 481 (a)->va_atime.tv_nsec = time.tv_usec * 1000; \ 482 (a)->va_vaflags |= VA_UTIMES_NULL; \ 483 break; \ 484 }; \ 485 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 486 switch (fxdr_unsigned(int, *tl)) { \ 487 case NFSV3SATTRTIME_TOCLIENT: \ 488 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 489 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 490 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 491 break; \ 492 case NFSV3SATTRTIME_TOSERVER: \ 493 (a)->va_mtime.tv_sec = time.tv_sec; \ 494 (a)->va_mtime.tv_nsec = time.tv_usec * 1000; \ 495 (a)->va_vaflags |= VA_UTIMES_NULL; \ 496 break; \ 497 }; } 498 499 #endif 500
Indexes created Mon Sep 29 21:09:56 GMT 2025