nfsm_subs.h revision 1.31
1 /* $NetBSD: nfsm_subs.h,v 1.31 2003/08/07 16:33:56 agc 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 ttretf = (VTONFS(v)->n_mtime == \ 222 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 223 } \ 224 nfsm_postop_attr((v), ttattrf, (flags)); \ 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,uint32_t *,NFSX_UNSIGNED); \ 296 if (((s) = fxdr_unsigned(uint32_t,*tl)) > (m)) { \ 297 m_freem(mrep); \ 298 error = EBADRPC; \ 299 goto nfsmout; \ 300 } } 301 302 #define nfsm_srvnamesiz(s) \ 303 { nfsm_dissect(tl,uint32_t *,NFSX_UNSIGNED); \ 304 if (((s) = fxdr_unsigned(uint32_t,*tl)) > NFS_MAXNAMLEN) \ 305 error = NFSERR_NAMETOL; \ 306 if (error) \ 307 nfsm_reply(0); \ 308 } 309 310 #define nfsm_mtouio(p,s) \ 311 if ((s) > 0 && \ 312 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 313 error = t1; \ 314 m_freem(mrep); \ 315 goto nfsmout; \ 316 } 317 318 #define nfsm_uiotom(p,s) \ 319 if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ 320 error = t1; \ 321 m_freem(mreq); \ 322 goto nfsmout; \ 323 } 324 325 #define nfsm_reqhead(n,a,s) \ 326 mb = mreq = nfsm_reqh((n),(a),(s),&bpos) 327 328 #define nfsm_reqdone m_freem(mrep); \ 329 nfsmout: 330 331 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 332 #define nfsm_padlen(a) (nfsm_rndup(a) - (a)) 333 334 #define nfsm_request(v, t, p, c) \ 335 if ((error = nfs_request((v), mreq, (t), (p), \ 336 (c), &mrep, &md, &dpos)) != 0) { \ 337 if (error & NFSERR_RETERR) \ 338 error &= ~NFSERR_RETERR; \ 339 else \ 340 goto nfsmout; \ 341 } 342 343 #define nfsm_strtom(a,s,m) \ 344 if ((s) > (m)) { \ 345 m_freem(mreq); \ 346 error = ENAMETOOLONG; \ 347 goto nfsmout; \ 348 } \ 349 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 350 if (t2 <= M_TRAILINGSPACE(mb)) { \ 351 nfsm_build(tl,u_int32_t *,t2); \ 352 *tl++ = txdr_unsigned(s); \ 353 *(tl+((t2>>2)-2)) = 0; \ 354 memcpy((caddr_t)tl, (const char *)(a), (s)); \ 355 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 356 error = t2; \ 357 m_freem(mreq); \ 358 goto nfsmout; \ 359 } 360 361 #define nfsm_srvdone \ 362 nfsmout: \ 363 return(error) 364 365 #define nfsm_reply(s) \ 366 { \ 367 nfsd->nd_repstat = error; \ 368 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 369 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 370 mrq, &mb, &bpos); \ 371 else \ 372 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 373 mrq, &mb, &bpos); \ 374 if (mrep != NULL) { \ 375 m_freem(mrep); \ 376 mrep = NULL; \ 377 } \ 378 mreq = *mrq; \ 379 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 380 error == EBADRPC)) \ 381 return(0); \ 382 } 383 384 #define nfsm_writereply(s, v3) \ 385 { \ 386 nfsd->nd_repstat = error; \ 387 if (error && !(v3)) \ 388 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 389 &mreq, &mb, &bpos); \ 390 else \ 391 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 392 &mreq, &mb, &bpos); \ 393 } 394 395 #define nfsm_adv(s) \ 396 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 397 if (t1 >= (s)) { \ 398 dpos += (s); \ 399 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 400 error = t1; \ 401 m_freem(mrep); \ 402 goto nfsmout; \ 403 } } 404 405 #define nfsm_srvmtofh(f) \ 406 { int fhlen = NFSX_V3FH; \ 407 if (nfsd->nd_flag & ND_NFSV3) { \ 408 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 409 fhlen = fxdr_unsigned(int, *tl); \ 410 if (fhlen == 0) { \ 411 memset((caddr_t)(f), 0, NFSX_V3FH); \ 412 } else if (fhlen != NFSX_V3FH) { \ 413 error = EBADRPC; \ 414 nfsm_reply(0); \ 415 } \ 416 } \ 417 if (fhlen != 0) { \ 418 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 419 memcpy( (caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 420 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 421 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 422 } \ 423 } 424 425 #define nfsm_clget \ 426 if (bp >= be) { \ 427 if (mp == mb) \ 428 mp->m_len += bp-bpos; \ 429 mp = m_get(M_WAIT, MT_DATA); \ 430 MCLAIM(mp, &nfs_mowner); \ 431 m_clget(mp, M_WAIT); \ 432 mp->m_len = NFSMSIZ(mp); \ 433 mp2->m_next = mp; \ 434 mp2 = mp; \ 435 bp = mtod(mp, caddr_t); \ 436 be = bp+mp->m_len; \ 437 } \ 438 tl = (u_int32_t *)bp 439 440 #define nfsm_srvfillattr(a, f) \ 441 nfsm_srvfattr(nfsd, (a), (f)) 442 443 #define nfsm_srvwcc_data(br, b, ar, a) \ 444 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 445 446 #define nfsm_srvpostop_attr(r, a) \ 447 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 448 449 #define nfsm_srvsattr(a) \ 450 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 451 if (*tl == nfs_true) { \ 452 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 453 (a)->va_mode = nfstov_mode(*tl); \ 454 } \ 455 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 456 if (*tl == nfs_true) { \ 457 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 458 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 459 } \ 460 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 461 if (*tl == nfs_true) { \ 462 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 463 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 464 } \ 465 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 466 if (*tl == nfs_true) { \ 467 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 468 (a)->va_size = fxdr_hyper(tl); \ 469 } \ 470 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 471 switch (fxdr_unsigned(int, *tl)) { \ 472 case NFSV3SATTRTIME_TOCLIENT: \ 473 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 474 fxdr_nfsv3time(tl, &(a)->va_atime); \ 475 break; \ 476 case NFSV3SATTRTIME_TOSERVER: \ 477 (a)->va_atime.tv_sec = time.tv_sec; \ 478 (a)->va_atime.tv_nsec = time.tv_usec * 1000; \ 479 (a)->va_vaflags |= VA_UTIMES_NULL; \ 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 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 488 break; \ 489 case NFSV3SATTRTIME_TOSERVER: \ 490 (a)->va_mtime.tv_sec = time.tv_sec; \ 491 (a)->va_mtime.tv_nsec = time.tv_usec * 1000; \ 492 (a)->va_vaflags |= VA_UTIMES_NULL; \ 493 break; \ 494 }; } 495 496 #endif 497
Indexes created Tue Sep 30 11:09:46 GMT 2025