nfsm_subs.h revision 1.23
1 /* $NetBSD: nfsm_subs.h,v 1.23 2003/02/26 06:31:20 matt 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95 39 */ 40 41 42 #ifndef _NFS_NFSM_SUBS_H_ 43 #define _NFS_NFSM_SUBS_H_ 44 45 46 /* 47 * These macros do strange and peculiar things to mbuf chains for 48 * the assistance of the nfs code. To attempt to use them for any 49 * other purpose will be dangerous. (they make weird assumptions) 50 */ 51 52 /* 53 * First define what the actual subs. return 54 */ 55 56 #define M_HASCL(m) ((m)->m_flags & M_EXT) 57 #define NFSMINOFF(m) \ 58 if (M_HASCL(m)) \ 59 (m)->m_data = (m)->m_ext.ext_buf; \ 60 else if ((m)->m_flags & M_PKTHDR) \ 61 (m)->m_data = (m)->m_pktdat; \ 62 else \ 63 (m)->m_data = (m)->m_dat 64 #define NFSMADV(m, s) (m)->m_data += (s) 65 #define NFSMSIZ(m) ((M_HASCL(m)) ? (m)->m_ext.ext_size : \ 66 (((m)->m_flags & M_PKTHDR) ? MHLEN : MLEN)) 67 68 /* 69 * Now for the macros that do the simple stuff and call the functions 70 * for the hard stuff. 71 * These macros use several vars. declared in nfsm_reqhead and these 72 * vars. must not be used elsewhere unless you are careful not to corrupt 73 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 74 * that may be used so long as the value is not expected to retained 75 * after a macro. 76 * I know, this is kind of dorkey, but it makes the actual op functions 77 * fairly clean and deals with the mess caused by the xdr discriminating 78 * unions. 79 */ 80 81 #define nfsm_build(a,c,s) \ 82 { if ((s) > M_TRAILINGSPACE(mb)) { \ 83 struct mbuf *mb2; \ 84 mb2 = m_get(M_WAIT, MT_DATA); \ 85 MCLAIM(mb2, &nfs_mowner); \ 86 if ((s) > MLEN) \ 87 panic("build > MLEN"); \ 88 mb->m_next = mb2; \ 89 mb = mb2; \ 90 mb->m_len = 0; \ 91 bpos = mtod(mb, caddr_t); \ 92 } \ 93 (a) = (c)(bpos); \ 94 mb->m_len += (s); \ 95 bpos += (s); } 96 97 #define nfsm_aligned(p) ALIGNED_POINTER(p,u_int32_t) 98 99 #define nfsm_dissect(a, c, s) \ 100 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 101 if (t1 >= (s) && nfsm_aligned(dpos)) { \ 102 (a) = (c)(dpos); \ 103 dpos += (s); \ 104 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 105 error = t1; \ 106 m_freem(mrep); \ 107 goto nfsmout; \ 108 } else { \ 109 (a) = (c)cp2; \ 110 } } 111 112 #define nfsm_fhtom(v, v3) \ 113 { if (v3) { \ 114 t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ 115 if (t2 <= M_TRAILINGSPACE(mb)) { \ 116 nfsm_build(tl, u_int32_t *, t2); \ 117 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ 118 *(tl + ((t2>>2) - 2)) = 0; \ 119 memcpy((caddr_t)tl,(caddr_t)VTONFS(v)->n_fhp, \ 120 VTONFS(v)->n_fhsize); \ 121 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ 122 (caddr_t)VTONFS(v)->n_fhp, \ 123 VTONFS(v)->n_fhsize)) != 0) { \ 124 error = t2; \ 125 m_freem(mreq); \ 126 goto nfsmout; \ 127 } \ 128 } else { \ 129 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 130 memcpy(cp, (caddr_t)VTONFS(v)->n_fhp, NFSX_V2FH); \ 131 } } 132 133 #define nfsm_srvfhtom(f, v3) \ 134 { if (v3) { \ 135 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH); \ 136 *tl++ = txdr_unsigned(NFSX_V3FH); \ 137 memcpy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 138 } else { \ 139 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 140 memcpy(cp, (caddr_t)(f), NFSX_V2FH); \ 141 } } 142 143 #define nfsm_srvpostop_fh(f) \ 144 { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 145 *tl++ = nfs_true; \ 146 *tl++ = txdr_unsigned(NFSX_V3FH); \ 147 memcpy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 148 } 149 150 #define nfsm_mtofh(d, v, v3, f) \ 151 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 152 if (v3) { \ 153 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 154 (f) = fxdr_unsigned(int, *tl); \ 155 } else \ 156 (f) = 1; \ 157 if (f) { \ 158 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 159 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 160 &ttnp)) != 0) { \ 161 error = t1; \ 162 m_freem(mrep); \ 163 goto nfsmout; \ 164 } \ 165 (v) = NFSTOV(ttnp); \ 166 } \ 167 if (v3) { \ 168 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 169 if (f) \ 170 (f) = fxdr_unsigned(int, *tl); \ 171 else if (fxdr_unsigned(int, *tl)) \ 172 nfsm_adv(NFSX_V3FATTR); \ 173 } \ 174 if (f) \ 175 nfsm_loadattr((v), (struct vattr *)0, 0); \ 176 } 177 178 #define nfsm_getfh(f, s, v3) \ 179 { if (v3) { \ 180 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 181 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 182 (s) > NFSX_V3FHMAX) { \ 183 m_freem(mrep); \ 184 error = EBADRPC; \ 185 goto nfsmout; \ 186 } \ 187 } else \ 188 (s) = NFSX_V2FH; \ 189 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 190 191 #define nfsm_loadattr(v, a, flags) \ 192 { struct vnode *ttvp = (v); \ 193 if ((t1 = nfsm_loadattrcache(&ttvp, &md, &dpos, (a), (flags))) \ 194 != 0) { \ 195 error = t1; \ 196 m_freem(mrep); \ 197 goto nfsmout; \ 198 } \ 199 (v) = ttvp; } 200 201 #define nfsm_postop_attr(v, f, flags) \ 202 { struct vnode *ttvp = (v); \ 203 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 204 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 205 if ((t1 = nfsm_loadattrcache(&ttvp, &md, &dpos, \ 206 (struct vattr *)0, (flags))) != 0) { \ 207 error = t1; \ 208 (f) = 0; \ 209 m_freem(mrep); \ 210 goto nfsmout; \ 211 } \ 212 (v) = ttvp; \ 213 } } 214 215 /* Used as (f) for nfsm_wcc_data() */ 216 #define NFSV3_WCCRATTR 0 217 #define NFSV3_WCCCHK 1 218 219 #define nfsm_wcc_data(v, f, flags) \ 220 { int ttattrf, ttretf = 0; \ 221 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 222 if (*tl == nfs_true) { \ 223 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 224 if (f) \ 225 ttretf = (VTONFS(v)->n_mtime == \ 226 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 227 } \ 228 nfsm_postop_attr((v), ttattrf, (flags)); \ 229 if (f) { \ 230 (f) = ttretf; \ 231 } else { \ 232 (f) = ttattrf; \ 233 } } 234 235 /* If full is true, set all fields, otherwise just set mode and time fields */ 236 #define nfsm_v3attrbuild(a, full) \ 237 { if ((a)->va_mode != (mode_t)VNOVAL) { \ 238 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 239 *tl++ = nfs_true; \ 240 *tl = txdr_unsigned((a)->va_mode); \ 241 } else { \ 242 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 243 *tl = nfs_false; \ 244 } \ 245 if ((full) && (a)->va_uid != (uid_t)VNOVAL) { \ 246 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 247 *tl++ = nfs_true; \ 248 *tl = txdr_unsigned((a)->va_uid); \ 249 } else { \ 250 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 251 *tl = nfs_false; \ 252 } \ 253 if ((full) && (a)->va_gid != (gid_t)VNOVAL) { \ 254 nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 255 *tl++ = nfs_true; \ 256 *tl = txdr_unsigned((a)->va_gid); \ 257 } else { \ 258 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 259 *tl = nfs_false; \ 260 } \ 261 if ((full) && (a)->va_size != VNOVAL) { \ 262 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 263 *tl++ = nfs_true; \ 264 txdr_hyper((a)->va_size, tl); \ 265 } else { \ 266 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 267 *tl = nfs_false; \ 268 } \ 269 if ((a)->va_atime.tv_sec != VNOVAL) { \ 270 if ((a)->va_atime.tv_sec != time.tv_sec) { \ 271 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 272 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 273 txdr_nfsv3time(&(a)->va_atime, tl); \ 274 } else { \ 275 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 276 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ 277 } \ 278 } else { \ 279 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 280 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ 281 } \ 282 if ((a)->va_mtime.tv_sec != VNOVAL) { \ 283 if ((a)->va_mtime.tv_sec != time.tv_sec) { \ 284 nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ 285 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 286 txdr_nfsv3time(&(a)->va_mtime, tl); \ 287 } else { \ 288 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 289 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ 290 } \ 291 } else { \ 292 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ 293 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ 294 } \ 295 } 296 297 298 #define nfsm_strsiz(s,m) \ 299 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 300 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 301 m_freem(mrep); \ 302 error = EBADRPC; \ 303 goto nfsmout; \ 304 } } 305 306 #define nfsm_srvstrsiz(s,m) \ 307 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 308 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 309 error = EBADRPC; \ 310 nfsm_reply(0); \ 311 } } 312 313 #define nfsm_srvnamesiz(s) \ 314 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 315 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 316 error = NFSERR_NAMETOL; \ 317 if ((s) <= 0) \ 318 error = EBADRPC; \ 319 if (error) \ 320 nfsm_reply(0); \ 321 } 322 323 #define nfsm_mtouio(p,s) \ 324 if ((s) > 0 && \ 325 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 326 error = t1; \ 327 m_freem(mrep); \ 328 goto nfsmout; \ 329 } 330 331 #define nfsm_uiotom(p,s) \ 332 if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ 333 error = t1; \ 334 m_freem(mreq); \ 335 goto nfsmout; \ 336 } 337 338 #define nfsm_reqhead(v,a,s) \ 339 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 340 341 #define nfsm_reqdone m_freem(mrep); \ 342 nfsmout: 343 344 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 345 346 #define nfsm_request(v, t, p, c) \ 347 if ((error = nfs_request((v), mreq, (t), (p), \ 348 (c), &mrep, &md, &dpos)) != 0) { \ 349 if (error & NFSERR_RETERR) \ 350 error &= ~NFSERR_RETERR; \ 351 else \ 352 goto nfsmout; \ 353 } 354 355 #define nfsm_strtom(a,s,m) \ 356 if ((s) > (m)) { \ 357 m_freem(mreq); \ 358 error = ENAMETOOLONG; \ 359 goto nfsmout; \ 360 } \ 361 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 362 if (t2 <= M_TRAILINGSPACE(mb)) { \ 363 nfsm_build(tl,u_int32_t *,t2); \ 364 *tl++ = txdr_unsigned(s); \ 365 *(tl+((t2>>2)-2)) = 0; \ 366 memcpy((caddr_t)tl, (const char *)(a), (s)); \ 367 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 368 error = t2; \ 369 m_freem(mreq); \ 370 goto nfsmout; \ 371 } 372 373 #define nfsm_srvdone \ 374 nfsmout: \ 375 return(error) 376 377 #define nfsm_reply(s) \ 378 { \ 379 nfsd->nd_repstat = error; \ 380 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 381 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 382 mrq, &mb, &bpos); \ 383 else \ 384 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 385 mrq, &mb, &bpos); \ 386 if (mrep != NULL) { \ 387 m_freem(mrep); \ 388 mrep = NULL; \ 389 } \ 390 mreq = *mrq; \ 391 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 392 error == EBADRPC)) \ 393 return(0); \ 394 } 395 396 #define nfsm_writereply(s, v3) \ 397 { \ 398 nfsd->nd_repstat = error; \ 399 if (error && !(v3)) \ 400 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 401 &mreq, &mb, &bpos); \ 402 else \ 403 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 404 &mreq, &mb, &bpos); \ 405 } 406 407 #define nfsm_adv(s) \ 408 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 409 if (t1 >= (s)) { \ 410 dpos += (s); \ 411 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 412 error = t1; \ 413 m_freem(mrep); \ 414 goto nfsmout; \ 415 } } 416 417 #define nfsm_srvmtofh(f) \ 418 { int fhlen = NFSX_V3FH; \ 419 if (nfsd->nd_flag & ND_NFSV3) { \ 420 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 421 fhlen = fxdr_unsigned(int, *tl); \ 422 if (fhlen == 0) { \ 423 memset((caddr_t)(f), 0, NFSX_V3FH); \ 424 } else if (fhlen != NFSX_V3FH) { \ 425 error = EBADRPC; \ 426 nfsm_reply(0); \ 427 } \ 428 } \ 429 if (fhlen != 0) { \ 430 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 431 memcpy( (caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 432 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 433 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 434 } \ 435 } 436 437 #define nfsm_clget \ 438 if (bp >= be) { \ 439 if (mp == mb) \ 440 mp->m_len += bp-bpos; \ 441 mp = m_get(M_WAIT, MT_DATA); \ 442 MCLAIM(mb2, &nfs_mowner); \ 443 m_clget(mp, M_WAIT); \ 444 mp->m_len = NFSMSIZ(mp); \ 445 mp2->m_next = mp; \ 446 mp2 = mp; \ 447 bp = mtod(mp, caddr_t); \ 448 be = bp+mp->m_len; \ 449 } \ 450 tl = (u_int32_t *)bp 451 452 #define nfsm_srvfillattr(a, f) \ 453 nfsm_srvfattr(nfsd, (a), (f)) 454 455 #define nfsm_srvwcc_data(br, b, ar, a) \ 456 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 457 458 #define nfsm_srvpostop_attr(r, a) \ 459 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 460 461 #define nfsm_srvsattr(a) \ 462 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 463 if (*tl == nfs_true) { \ 464 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 465 (a)->va_mode = nfstov_mode(*tl); \ 466 } \ 467 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 468 if (*tl == nfs_true) { \ 469 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 470 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 471 } \ 472 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 473 if (*tl == nfs_true) { \ 474 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 475 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 476 } \ 477 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 478 if (*tl == nfs_true) { \ 479 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 480 (a)->va_size = fxdr_hyper(tl); \ 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_atime); \ 487 break; \ 488 case NFSV3SATTRTIME_TOSERVER: \ 489 (a)->va_atime.tv_sec = time.tv_sec; \ 490 (a)->va_atime.tv_nsec = time.tv_usec * 1000; \ 491 (a)->va_vaflags |= VA_UTIMES_NULL; \ 492 break; \ 493 }; \ 494 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 495 switch (fxdr_unsigned(int, *tl)) { \ 496 case NFSV3SATTRTIME_TOCLIENT: \ 497 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 498 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 499 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 500 break; \ 501 case NFSV3SATTRTIME_TOSERVER: \ 502 (a)->va_mtime.tv_sec = time.tv_sec; \ 503 (a)->va_mtime.tv_nsec = time.tv_usec * 1000; \ 504 (a)->va_vaflags |= VA_UTIMES_NULL; \ 505 break; \ 506 }; } 507 508 #endif 509
Indexes created Sun Sep 28 16:09:52 GMT 2025