nfsm_subs.h revision 1.14
1 /* $NetBSD: nfsm_subs.h,v 1.14 1997/02/24 23:26:20 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 #define nfsm_aligned(p) ALIGNED_POINTER(p,u_int32_t) 96 97 #define nfsm_dissect(a, c, s) \ 98 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 99 if (t1 >= (s) && nfsm_aligned(dpos)) { \ 100 (a) = (c)(dpos); \ 101 dpos += (s); \ 102 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 103 error = t1; \ 104 m_freem(mrep); \ 105 goto nfsmout; \ 106 } else { \ 107 (a) = (c)cp2; \ 108 } } 109 110 #define nfsm_fhtom(v, v3) \ 111 { if (v3) { \ 112 t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ 113 if (t2 <= M_TRAILINGSPACE(mb)) { \ 114 nfsm_build(tl, u_int32_t *, t2); \ 115 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ 116 *(tl + ((t2>>2) - 2)) = 0; \ 117 bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \ 118 VTONFS(v)->n_fhsize); \ 119 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ 120 (caddr_t)VTONFS(v)->n_fhp, \ 121 VTONFS(v)->n_fhsize)) != 0) { \ 122 error = t2; \ 123 m_freem(mreq); \ 124 goto nfsmout; \ 125 } \ 126 } else { \ 127 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 128 bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \ 129 } } 130 131 #define nfsm_srvfhtom(f, v3) \ 132 { if (v3) { \ 133 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH); \ 134 *tl++ = txdr_unsigned(NFSX_V3FH); \ 135 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 136 } else { \ 137 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 138 bcopy((caddr_t)(f), cp, NFSX_V2FH); \ 139 } } 140 141 #define nfsm_srvpostop_fh(f) \ 142 { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 143 *tl++ = nfs_true; \ 144 *tl++ = txdr_unsigned(NFSX_V3FH); \ 145 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 146 } 147 148 #define nfsm_mtofh(d, v, v3, f) \ 149 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 150 if (v3) { \ 151 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 152 (f) = fxdr_unsigned(int, *tl); \ 153 } else \ 154 (f) = 1; \ 155 if (f) { \ 156 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 157 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 158 &ttnp)) != 0) { \ 159 error = t1; \ 160 m_freem(mrep); \ 161 goto nfsmout; \ 162 } \ 163 (v) = NFSTOV(ttnp); \ 164 } \ 165 if (v3) { \ 166 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 167 if (f) \ 168 (f) = fxdr_unsigned(int, *tl); \ 169 else if (fxdr_unsigned(int, *tl)) \ 170 nfsm_adv(NFSX_V3FATTR); \ 171 } \ 172 if (f) \ 173 nfsm_loadattr((v), (struct vattr *)0); \ 174 } 175 176 #define nfsm_getfh(f, s, v3) \ 177 { if (v3) { \ 178 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 179 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 180 (s) > NFSX_V3FHMAX) { \ 181 m_freem(mrep); \ 182 error = EBADRPC; \ 183 goto nfsmout; \ 184 } \ 185 } else \ 186 (s) = NFSX_V2FH; \ 187 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 188 189 #define nfsm_loadattr(v, a) \ 190 { struct vnode *ttvp = (v); \ 191 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 192 error = t1; \ 193 m_freem(mrep); \ 194 goto nfsmout; \ 195 } \ 196 (v) = ttvp; } 197 198 #define nfsm_postop_attr(v, f) \ 199 { struct vnode *ttvp = (v); \ 200 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 201 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 202 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 203 (struct vattr *)0)) != 0) { \ 204 error = t1; \ 205 (f) = 0; \ 206 m_freem(mrep); \ 207 goto nfsmout; \ 208 } \ 209 (v) = ttvp; \ 210 } } 211 212 /* Used as (f) for nfsm_wcc_data() */ 213 #define NFSV3_WCCRATTR 0 214 #define NFSV3_WCCCHK 1 215 216 #define nfsm_wcc_data(v, f) \ 217 { int ttattrf, ttretf = 0; \ 218 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 219 if (*tl == nfs_true) { \ 220 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 221 if (f) \ 222 ttretf = (VTONFS(v)->n_mtime == \ 223 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 224 } \ 225 nfsm_postop_attr((v), ttattrf); \ 226 if (f) { \ 227 (f) = ttretf; \ 228 } else { \ 229 (f) = ttattrf; \ 230 } } 231 232 #define nfsm_v3sattr(s, a) \ 233 { (s)->sa_modetrue = nfs_true; \ 234 (s)->sa_mode = vtonfsv3_mode((a)->va_mode); \ 235 (s)->sa_uidfalse = nfs_false; \ 236 (s)->sa_gidfalse = nfs_false; \ 237 (s)->sa_sizefalse = nfs_false; \ 238 (s)->sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 239 txdr_nfsv3time(&(a)->va_atime, &(s)->sa_atime); \ 240 (s)->sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 241 txdr_nfsv3time(&(a)->va_mtime, &(s)->sa_mtime); \ 242 } 243 244 #define nfsm_strsiz(s,m) \ 245 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 246 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 247 m_freem(mrep); \ 248 error = EBADRPC; \ 249 goto nfsmout; \ 250 } } 251 252 #define nfsm_srvstrsiz(s,m) \ 253 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 254 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 255 error = EBADRPC; \ 256 nfsm_reply(0); \ 257 } } 258 259 #define nfsm_srvnamesiz(s) \ 260 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 261 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 262 error = NFSERR_NAMETOL; \ 263 if ((s) <= 0) \ 264 error = EBADRPC; \ 265 if (error) \ 266 nfsm_reply(0); \ 267 } 268 269 #define nfsm_mtouio(p,s) \ 270 if ((s) > 0 && \ 271 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 272 error = t1; \ 273 m_freem(mrep); \ 274 goto nfsmout; \ 275 } 276 277 #define nfsm_uiotom(p,s) \ 278 if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ 279 error = t1; \ 280 m_freem(mreq); \ 281 goto nfsmout; \ 282 } 283 284 #define nfsm_reqhead(v,a,s) \ 285 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 286 287 #define nfsm_reqdone m_freem(mrep); \ 288 nfsmout: 289 290 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 291 292 #define nfsm_request(v, t, p, c) \ 293 if ((error = nfs_request((v), mreq, (t), (p), \ 294 (c), &mrep, &md, &dpos)) != 0) { \ 295 if (error & NFSERR_RETERR) \ 296 error &= ~NFSERR_RETERR; \ 297 else \ 298 goto nfsmout; \ 299 } 300 301 #define nfsm_strtom(a,s,m) \ 302 if ((s) > (m)) { \ 303 m_freem(mreq); \ 304 error = ENAMETOOLONG; \ 305 goto nfsmout; \ 306 } \ 307 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 308 if (t2 <= M_TRAILINGSPACE(mb)) { \ 309 nfsm_build(tl,u_int32_t *,t2); \ 310 *tl++ = txdr_unsigned(s); \ 311 *(tl+((t2>>2)-2)) = 0; \ 312 bcopy((const char *)(a), (caddr_t)tl, (s)); \ 313 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 314 error = t2; \ 315 m_freem(mreq); \ 316 goto nfsmout; \ 317 } 318 319 #define nfsm_srvdone \ 320 nfsmout: \ 321 return(error) 322 323 #define nfsm_reply(s) \ 324 { \ 325 nfsd->nd_repstat = error; \ 326 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 327 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 328 mrq, &mb, &bpos); \ 329 else \ 330 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 331 mrq, &mb, &bpos); \ 332 if (mrep != NULL) { \ 333 m_freem(mrep); \ 334 mrep = NULL; \ 335 } \ 336 mreq = *mrq; \ 337 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 338 error == EBADRPC)) \ 339 return(0); \ 340 } 341 342 #define nfsm_writereply(s, v3) \ 343 { \ 344 nfsd->nd_repstat = error; \ 345 if (error && !(v3)) \ 346 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 347 &mreq, &mb, &bpos); \ 348 else \ 349 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 350 &mreq, &mb, &bpos); \ 351 } 352 353 #define nfsm_adv(s) \ 354 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 355 if (t1 >= (s)) { \ 356 dpos += (s); \ 357 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 358 error = t1; \ 359 m_freem(mrep); \ 360 goto nfsmout; \ 361 } } 362 363 #define nfsm_srvmtofh(f) \ 364 { if (nfsd->nd_flag & ND_NFSV3) { \ 365 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 366 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 367 error = EBADRPC; \ 368 nfsm_reply(0); \ 369 } \ 370 } \ 371 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 372 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 373 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 374 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 375 } 376 377 #define nfsm_clget \ 378 if (bp >= be) { \ 379 if (mp == mb) \ 380 mp->m_len += bp-bpos; \ 381 MGET(mp, M_WAIT, MT_DATA); \ 382 MCLGET(mp, M_WAIT); \ 383 mp->m_len = NFSMSIZ(mp); \ 384 mp2->m_next = mp; \ 385 mp2 = mp; \ 386 bp = mtod(mp, caddr_t); \ 387 be = bp+mp->m_len; \ 388 } \ 389 tl = (u_int32_t *)bp 390 391 #define nfsm_srvfillattr(a, f) \ 392 nfsm_srvfattr(nfsd, (a), (f)) 393 394 #define nfsm_srvwcc_data(br, b, ar, a) \ 395 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 396 397 #define nfsm_srvpostop_attr(r, a) \ 398 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 399 400 #define nfsm_srvsattr(a) \ 401 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 402 if (*tl == nfs_true) { \ 403 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 404 (a)->va_mode = nfstov_mode(*tl); \ 405 } \ 406 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 407 if (*tl == nfs_true) { \ 408 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 409 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 410 } \ 411 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 412 if (*tl == nfs_true) { \ 413 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 414 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 415 } \ 416 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 417 if (*tl == nfs_true) { \ 418 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 419 fxdr_hyper(tl, &(a)->va_size); \ 420 } \ 421 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 422 switch (fxdr_unsigned(int, *tl)) { \ 423 case NFSV3SATTRTIME_TOCLIENT: \ 424 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 425 fxdr_nfsv3time(tl, &(a)->va_atime); \ 426 break; \ 427 case NFSV3SATTRTIME_TOSERVER: \ 428 (a)->va_atime.tv_sec = time.tv_sec; \ 429 (a)->va_atime.tv_nsec = time.tv_usec * 1000; \ 430 break; \ 431 }; \ 432 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 433 switch (fxdr_unsigned(int, *tl)) { \ 434 case NFSV3SATTRTIME_TOCLIENT: \ 435 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 436 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 437 break; \ 438 case NFSV3SATTRTIME_TOSERVER: \ 439 (a)->va_mtime.tv_sec = time.tv_sec; \ 440 (a)->va_mtime.tv_nsec = time.tv_usec * 1000; \ 441 break; \ 442 }; } 443 444 #endif 445
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