nfsm_subs.h revision 1.12
1 /* $NetBSD: nfsm_subs.h,v 1.12 1997/02/22 03:11:12 fvdl 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))?MCLBYTES: \ 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 MGET(mb2, M_WAIT, MT_DATA); \ 84 if ((s) > MLEN) \ 85 panic("build > MLEN"); \ 86 mb->m_next = mb2; \ 87 mb = mb2; \ 88 mb->m_len = 0; \ 89 bpos = mtod(mb, caddr_t); \ 90 } \ 91 (a) = (c)(bpos); \ 92 mb->m_len += (s); \ 93 bpos += (s); } 94 95 /* 96 * XXX this is wrong for 64bit architectures, but we're dealing with 32bit 97 * chunks only here and assume (safely) that they can be addressed on 98 * 32bit boundaries. This needs to be changed if 64bit quantities will 99 * be extracted from the mbufs. Also, this isn't even needed for the i386, 100 * it handles misaligned accesses. So the ALIGN macro doesn't quite cut 101 * it here. 102 */ 103 #ifdef __i386__ 104 #define nfsm_aligned(p) 1 105 #else 106 #define nfsm_aligned(p) (((int)(p) & 3) == 0) 107 #endif 108 109 #define nfsm_dissect(a, c, s) \ 110 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 111 if (t1 >= (s) && nfsm_aligned(dpos)) { \ 112 (a) = (c)(dpos); \ 113 dpos += (s); \ 114 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 115 error = t1; \ 116 m_freem(mrep); \ 117 goto nfsmout; \ 118 } else { \ 119 (a) = (c)cp2; \ 120 } } 121 122 #define nfsm_fhtom(v, v3) \ 123 { if (v3) { \ 124 t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ 125 if (t2 <= M_TRAILINGSPACE(mb)) { \ 126 nfsm_build(tl, u_int32_t *, t2); \ 127 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ 128 *(tl + ((t2>>2) - 2)) = 0; \ 129 bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \ 130 VTONFS(v)->n_fhsize); \ 131 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ 132 (caddr_t)VTONFS(v)->n_fhp, \ 133 VTONFS(v)->n_fhsize)) != 0) { \ 134 error = t2; \ 135 m_freem(mreq); \ 136 goto nfsmout; \ 137 } \ 138 } else { \ 139 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 140 bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \ 141 } } 142 143 #define nfsm_srvfhtom(f, v3) \ 144 { if (v3) { \ 145 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH); \ 146 *tl++ = txdr_unsigned(NFSX_V3FH); \ 147 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 148 } else { \ 149 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 150 bcopy((caddr_t)(f), cp, NFSX_V2FH); \ 151 } } 152 153 #define nfsm_srvpostop_fh(f) \ 154 { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 155 *tl++ = nfs_true; \ 156 *tl++ = txdr_unsigned(NFSX_V3FH); \ 157 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 158 } 159 160 #define nfsm_mtofh(d, v, v3, f) \ 161 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 162 if (v3) { \ 163 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 164 (f) = fxdr_unsigned(int, *tl); \ 165 } else \ 166 (f) = 1; \ 167 if (f) { \ 168 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 169 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 170 &ttnp)) != 0) { \ 171 error = t1; \ 172 m_freem(mrep); \ 173 goto nfsmout; \ 174 } \ 175 (v) = NFSTOV(ttnp); \ 176 } \ 177 if (v3) { \ 178 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 179 if (f) \ 180 (f) = fxdr_unsigned(int, *tl); \ 181 else if (fxdr_unsigned(int, *tl)) \ 182 nfsm_adv(NFSX_V3FATTR); \ 183 } \ 184 if (f) \ 185 nfsm_loadattr((v), (struct vattr *)0); \ 186 } 187 188 #define nfsm_getfh(f, s, v3) \ 189 { if (v3) { \ 190 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 191 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 192 (s) > NFSX_V3FHMAX) { \ 193 m_freem(mrep); \ 194 error = EBADRPC; \ 195 goto nfsmout; \ 196 } \ 197 } else \ 198 (s) = NFSX_V2FH; \ 199 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 200 201 #define nfsm_loadattr(v, a) \ 202 { struct vnode *ttvp = (v); \ 203 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 204 error = t1; \ 205 m_freem(mrep); \ 206 goto nfsmout; \ 207 } \ 208 (v) = ttvp; } 209 210 #define nfsm_postop_attr(v, f) \ 211 { struct vnode *ttvp = (v); \ 212 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 213 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 214 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 215 (struct vattr *)0)) != 0) { \ 216 error = t1; \ 217 (f) = 0; \ 218 m_freem(mrep); \ 219 goto nfsmout; \ 220 } \ 221 (v) = ttvp; \ 222 } } 223 224 /* Used as (f) for nfsm_wcc_data() */ 225 #define NFSV3_WCCRATTR 0 226 #define NFSV3_WCCCHK 1 227 228 #define nfsm_wcc_data(v, f) \ 229 { int ttattrf, ttretf = 0; \ 230 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 231 if (*tl == nfs_true) { \ 232 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 233 if (f) \ 234 ttretf = (VTONFS(v)->n_mtime == \ 235 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 236 } \ 237 nfsm_postop_attr((v), ttattrf); \ 238 if (f) { \ 239 (f) = ttretf; \ 240 } else { \ 241 (f) = ttattrf; \ 242 } } 243 244 #define nfsm_v3sattr(s, a) \ 245 { (s)->sa_modetrue = nfs_true; \ 246 (s)->sa_mode = vtonfsv3_mode((a)->va_mode); \ 247 (s)->sa_uidfalse = nfs_false; \ 248 (s)->sa_gidfalse = nfs_false; \ 249 (s)->sa_sizefalse = nfs_false; \ 250 (s)->sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 251 txdr_nfsv3time(&(a)->va_atime, &(s)->sa_atime); \ 252 (s)->sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 253 txdr_nfsv3time(&(a)->va_mtime, &(s)->sa_mtime); \ 254 } 255 256 #define nfsm_strsiz(s,m) \ 257 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 258 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 259 m_freem(mrep); \ 260 error = EBADRPC; \ 261 goto nfsmout; \ 262 } } 263 264 #define nfsm_srvstrsiz(s,m) \ 265 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 266 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 267 error = EBADRPC; \ 268 nfsm_reply(0); \ 269 } } 270 271 #define nfsm_srvnamesiz(s) \ 272 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 273 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 274 error = NFSERR_NAMETOL; \ 275 if ((s) <= 0) \ 276 error = EBADRPC; \ 277 if (error) \ 278 nfsm_reply(0); \ 279 } 280 281 #define nfsm_mtouio(p,s) \ 282 if ((s) > 0 && \ 283 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 284 error = t1; \ 285 m_freem(mrep); \ 286 goto nfsmout; \ 287 } 288 289 #define nfsm_uiotom(p,s) \ 290 if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ 291 error = t1; \ 292 m_freem(mreq); \ 293 goto nfsmout; \ 294 } 295 296 #define nfsm_reqhead(v,a,s) \ 297 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 298 299 #define nfsm_reqdone m_freem(mrep); \ 300 nfsmout: 301 302 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 303 304 #define nfsm_request(v, t, p, c) \ 305 if ((error = nfs_request((v), mreq, (t), (p), \ 306 (c), &mrep, &md, &dpos)) != 0) { \ 307 if (error & NFSERR_RETERR) \ 308 error &= ~NFSERR_RETERR; \ 309 else \ 310 goto nfsmout; \ 311 } 312 313 #define nfsm_strtom(a,s,m) \ 314 if ((s) > (m)) { \ 315 m_freem(mreq); \ 316 error = ENAMETOOLONG; \ 317 goto nfsmout; \ 318 } \ 319 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 320 if (t2 <= M_TRAILINGSPACE(mb)) { \ 321 nfsm_build(tl,u_int32_t *,t2); \ 322 *tl++ = txdr_unsigned(s); \ 323 *(tl+((t2>>2)-2)) = 0; \ 324 bcopy((const char *)(a), (caddr_t)tl, (s)); \ 325 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 326 error = t2; \ 327 m_freem(mreq); \ 328 goto nfsmout; \ 329 } 330 331 #define nfsm_srvdone \ 332 nfsmout: \ 333 return(error) 334 335 #define nfsm_reply(s) \ 336 { \ 337 nfsd->nd_repstat = error; \ 338 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 339 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 340 mrq, &mb, &bpos); \ 341 else \ 342 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 343 mrq, &mb, &bpos); \ 344 if (mrep != NULL) { \ 345 m_freem(mrep); \ 346 mrep = NULL; \ 347 } \ 348 mreq = *mrq; \ 349 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 350 error == EBADRPC)) \ 351 return(0); \ 352 } 353 354 #define nfsm_writereply(s, v3) \ 355 { \ 356 nfsd->nd_repstat = error; \ 357 if (error && !(v3)) \ 358 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 359 &mreq, &mb, &bpos); \ 360 else \ 361 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 362 &mreq, &mb, &bpos); \ 363 } 364 365 #define nfsm_adv(s) \ 366 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 367 if (t1 >= (s)) { \ 368 dpos += (s); \ 369 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 370 error = t1; \ 371 m_freem(mrep); \ 372 goto nfsmout; \ 373 } } 374 375 #define nfsm_srvmtofh(f) \ 376 { if (nfsd->nd_flag & ND_NFSV3) { \ 377 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 378 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 379 error = EBADRPC; \ 380 nfsm_reply(0); \ 381 } \ 382 } \ 383 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 384 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 385 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 386 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 387 } 388 389 #define nfsm_clget \ 390 if (bp >= be) { \ 391 if (mp == mb) \ 392 mp->m_len += bp-bpos; \ 393 MGET(mp, M_WAIT, MT_DATA); \ 394 MCLGET(mp, M_WAIT); \ 395 mp->m_len = NFSMSIZ(mp); \ 396 mp2->m_next = mp; \ 397 mp2 = mp; \ 398 bp = mtod(mp, caddr_t); \ 399 be = bp+mp->m_len; \ 400 } \ 401 tl = (u_int32_t *)bp 402 403 #define nfsm_srvfillattr(a, f) \ 404 nfsm_srvfattr(nfsd, (a), (f)) 405 406 #define nfsm_srvwcc_data(br, b, ar, a) \ 407 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 408 409 #define nfsm_srvpostop_attr(r, a) \ 410 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 411 412 #define nfsm_srvsattr(a) \ 413 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 414 if (*tl == nfs_true) { \ 415 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 416 (a)->va_mode = nfstov_mode(*tl); \ 417 } \ 418 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 419 if (*tl == nfs_true) { \ 420 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 421 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 422 } \ 423 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 424 if (*tl == nfs_true) { \ 425 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 426 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 427 } \ 428 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 429 if (*tl == nfs_true) { \ 430 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 431 fxdr_hyper(tl, &(a)->va_size); \ 432 } \ 433 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 434 switch (fxdr_unsigned(int, *tl)) { \ 435 case NFSV3SATTRTIME_TOCLIENT: \ 436 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 437 fxdr_nfsv3time(tl, &(a)->va_atime); \ 438 break; \ 439 case NFSV3SATTRTIME_TOSERVER: \ 440 (a)->va_atime.tv_sec = time.tv_sec; \ 441 (a)->va_atime.tv_nsec = time.tv_usec * 1000; \ 442 break; \ 443 }; \ 444 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 445 switch (fxdr_unsigned(int, *tl)) { \ 446 case NFSV3SATTRTIME_TOCLIENT: \ 447 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 448 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 449 break; \ 450 case NFSV3SATTRTIME_TOSERVER: \ 451 (a)->va_mtime.tv_sec = time.tv_sec; \ 452 (a)->va_mtime.tv_nsec = time.tv_usec * 1000; \ 453 break; \ 454 }; } 455 456 #endif 457
Indexes created Mon Sep 29 21:09:56 GMT 2025