nfsm_subs.h revision 9336
1/* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93 37 * $Id: nfsm_subs.h,v 1.6 1995/05/30 08:12:51 rgrimes Exp $ 38 */ 39 40#ifndef _NFS_NFSM_SUBS_H_ 41#define _NFS_NFSM_SUBS_H_ 42 43 44/* 45 * These macros do strange and peculiar things to mbuf chains for 46 * the assistance of the nfs code. To attempt to use them for any 47 * other purpose will be dangerous. (they make weird assumptions) 48 */ 49 50/* 51 * First define what the actual subs. return 52 */ 53extern struct mbuf *nfsm_reqh(); 54 55#define M_HASCL(m) ((m)->m_flags & M_EXT) 56#define NFSMINOFF(m) \ 57 if (M_HASCL(m)) \ 58 (m)->m_data = (m)->m_ext.ext_buf; \ 59 else if ((m)->m_flags & M_PKTHDR) \ 60 (m)->m_data = (m)->m_pktdat; \ 61 else \ 62 (m)->m_data = (m)->m_dat 63#define NFSMADV(m, s) (m)->m_data += (s) 64#define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ 65 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) 66 67/* 68 * Now for the macros that do the simple stuff and call the functions 69 * for the hard stuff. 70 * These macros use several vars. declared in nfsm_reqhead and these 71 * vars. must not be used elsewhere unless you are careful not to corrupt 72 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 73 * that may be used so long as the value is not expected to retained 74 * after a macro. 75 * I know, this is kind of dorkey, but it makes the actual op functions 76 * fairly clean and deals with the mess caused by the xdr discriminating 77 * unions. 78 */ 79 80#define nfsm_build(a,c,s) \ 81 { if ((s) > M_TRAILINGSPACE(mb)) { \ 82 MGET(mb2, M_WAIT, MT_DATA); \ 83 if ((s) > MLEN) \ 84 panic("build > MLEN"); \ 85 mb->m_next = mb2; \ 86 mb = mb2; \ 87 mb->m_len = 0; \ 88 bpos = mtod(mb, caddr_t); \ 89 } \ 90 (a) = (c)(bpos); \ 91 mb->m_len += (s); \ 92 bpos += (s); } 93 94#define nfsm_dissect(a, c, s) \ 95 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 96 if (t1 >= (s)) { \ 97 (a) = (c)(dpos); \ 98 dpos += (s); \ 99 } else if (t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) { \ 100 error = t1; \ 101 m_freem(mrep); \ 102 goto nfsmout; \ 103 } else { \ 104 (a) = (c)cp2; \ 105 } } 106 107#define nfsm_fhtom(v, v3) \ 108 { if (v3) { \ 109 t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ 110 if (t2 <= M_TRAILINGSPACE(mb)) { \ 111 nfsm_build(tl, u_long *, t2); \ 112 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ 113 *(tl + ((t2>>2) - 2)) = 0; \ 114 bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \ 115 VTONFS(v)->n_fhsize); \ 116 } else if (t2 = nfsm_strtmbuf(&mb, &bpos, \ 117 (caddr_t)VTONFS(v)->n_fhp, VTONFS(v)->n_fhsize)) { \ 118 error = t2; \ 119 m_freem(mreq); \ 120 goto nfsmout; \ 121 } \ 122 } else { \ 123 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 124 bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \ 125 } } 126 127#define nfsm_srvfhtom(f, v3) \ 128 { if (v3) { \ 129 nfsm_build(tl, u_long *, NFSX_UNSIGNED + NFSX_V3FH); \ 130 *tl++ = txdr_unsigned(NFSX_V3FH); \ 131 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 132 } else { \ 133 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 134 bcopy((caddr_t)(f), cp, NFSX_V2FH); \ 135 } } 136 137#define nfsm_srvpostop_fh(f) \ 138 { nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 139 *tl++ = nfs_true; \ 140 *tl++ = txdr_unsigned(NFSX_V3FH); \ 141 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 142 } 143 144#define nfsm_mtofh(d, v, v3, f) \ 145 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 146 if (v3) { \ 147 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 148 (f) = fxdr_unsigned(int, *tl); \ 149 } else \ 150 (f) = 1; \ 151 if (f) { \ 152 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 153 if (t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 154 &ttnp)) { \ 155 error = t1; \ 156 m_freem(mrep); \ 157 goto nfsmout; \ 158 } \ 159 (v) = NFSTOV(ttnp); \ 160 } \ 161 if (v3) { \ 162 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 163 if (f) \ 164 (f) = fxdr_unsigned(int, *tl); \ 165 else if (fxdr_unsigned(int, *tl)) \ 166 nfsm_adv(NFSX_V3FATTR); \ 167 } \ 168 if (f) \ 169 nfsm_loadattr((v), (struct vattr *)0); \ 170 } 171 172#define nfsm_getfh(f, s, v3) \ 173 { if (v3) { \ 174 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 175 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 176 (s) > NFSX_V3FHMAX) { \ 177 m_freem(mrep); \ 178 error = EBADRPC; \ 179 goto nfsmout; \ 180 } \ 181 } else \ 182 (s) = NFSX_V2FH; \ 183 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 184 185#define nfsm_loadattr(v, a) \ 186 { struct vnode *ttvp = (v); \ 187 if (t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) { \ 188 error = t1; \ 189 m_freem(mrep); \ 190 goto nfsmout; \ 191 } \ 192 (v) = ttvp; } 193 194#define nfsm_postop_attr(v, f) \ 195 { struct vnode *ttvp = (v); \ 196 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 197 if ((f) = fxdr_unsigned(int, *tl)) { \ 198 if (t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 199 (struct vattr *)0)) { \ 200 error = t1; \ 201 (f) = 0; \ 202 m_freem(mrep); \ 203 goto nfsmout; \ 204 } \ 205 (v) = ttvp; \ 206 } } 207 208/* Used as (f) for nfsm_wcc_data() */ 209#define NFSV3_WCCRATTR 0 210#define NFSV3_WCCCHK 1 211 212#define nfsm_wcc_data(v, f) \ 213 { int ttattrf, ttretf = 0; \ 214 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 215 if (*tl == nfs_true) { \ 216 nfsm_dissect(tl, u_long *, 6 * NFSX_UNSIGNED); \ 217 if (f) \ 218 ttretf = (VTONFS(v)->n_mtime == \ 219 fxdr_unsigned(u_long, *(tl + 2))); \ 220 } \ 221 nfsm_postop_attr((v), ttattrf); \ 222 if (f) { \ 223 (f) = ttretf; \ 224 } else { \ 225 (f) = ttattrf; \ 226 } } 227 228#define nfsm_v3sattr(s, a, u, g) \ 229 { (s)->sa_modetrue = nfs_true; \ 230 (s)->sa_mode = vtonfsv3_mode((a)->va_mode); \ 231 (s)->sa_uidtrue = nfs_true; \ 232 (s)->sa_uid = txdr_unsigned(u); \ 233 (s)->sa_gidtrue = nfs_true; \ 234 (s)->sa_gid = txdr_unsigned(g); \ 235 (s)->sa_sizefalse = nfs_false; \ 236 (s)->sa_atimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 237 txdr_nfsv3time(&(a)->va_atime, &(s)->sa_atime); \ 238 (s)->sa_mtimetype = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \ 239 txdr_nfsv3time(&(a)->va_mtime, &(s)->sa_mtime); \ 240 } 241 242#define nfsm_strsiz(s,m) \ 243 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 244 if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \ 245 m_freem(mrep); \ 246 error = EBADRPC; \ 247 goto nfsmout; \ 248 } } 249 250#define nfsm_srvstrsiz(s,m) \ 251 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 252 if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \ 253 error = EBADRPC; \ 254 nfsm_reply(0); \ 255 } } 256 257#define nfsm_srvnamesiz(s) \ 258 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 259 if (((s) = fxdr_unsigned(long,*tl)) > NFS_MAXNAMLEN) \ 260 error = NFSERR_NAMETOL; \ 261 if ((s) <= 0) \ 262 error = EBADRPC; \ 263 if (error) \ 264 nfsm_reply(0); \ 265 } 266 267#define nfsm_mtouio(p,s) \ 268 if ((s) > 0 && \ 269 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ 270 error = t1; \ 271 m_freem(mrep); \ 272 goto nfsmout; \ 273 } 274 275#define nfsm_uiotom(p,s) \ 276 if (t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \ 277 error = t1; \ 278 m_freem(mreq); \ 279 goto nfsmout; \ 280 } 281 282#define nfsm_reqhead(v,a,s) \ 283 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 284 285#define nfsm_reqdone m_freem(mrep); \ 286 nfsmout: 287 288#define nfsm_rndup(a) (((a)+3)&(~0x3)) 289 290#define nfsm_request(v, t, p, c) \ 291 if (error = nfs_request((v), mreq, (t), (p), \ 292 (c), &mrep, &md, &dpos)) { \ 293 if (error & NFSERR_RETERR) \ 294 error &= ~NFSERR_RETERR; \ 295 else \ 296 goto nfsmout; \ 297 } 298 299#define nfsm_strtom(a,s,m) \ 300 if ((s) > (m)) { \ 301 m_freem(mreq); \ 302 error = ENAMETOOLONG; \ 303 goto nfsmout; \ 304 } \ 305 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 306 if (t2 <= M_TRAILINGSPACE(mb)) { \ 307 nfsm_build(tl,u_long *,t2); \ 308 *tl++ = txdr_unsigned(s); \ 309 *(tl+((t2>>2)-2)) = 0; \ 310 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 311 } else if (t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \ 312 error = t2; \ 313 m_freem(mreq); \ 314 goto nfsmout; \ 315 } 316 317#define nfsm_srvdone \ 318 nfsmout: \ 319 return(error) 320 321#define nfsm_reply(s) \ 322 { \ 323 nfsd->nd_repstat = error; \ 324 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 325 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 326 mrq, &mb, &bpos); \ 327 else \ 328 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 329 mrq, &mb, &bpos); \ 330 m_freem(mrep); \ 331 mreq = *mrq; \ 332 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 333 error == EBADRPC)) \ 334 return(0); \ 335 } 336 337#define nfsm_writereply(s, v3) \ 338 { \ 339 nfsd->nd_repstat = error; \ 340 if (error && !(v3)) \ 341 (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ 342 &mreq, &mb, &bpos); \ 343 else \ 344 (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ 345 &mreq, &mb, &bpos); \ 346 } 347 348#define nfsm_adv(s) \ 349 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 350 if (t1 >= (s)) { \ 351 dpos += (s); \ 352 } else if (t1 = nfs_adv(&md, &dpos, (s), t1)) { \ 353 error = t1; \ 354 m_freem(mrep); \ 355 goto nfsmout; \ 356 } } 357 358#define nfsm_srvmtofh(f) \ 359 { if (nfsd->nd_flag & ND_NFSV3) { \ 360 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 361 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 362 error = EBADRPC; \ 363 nfsm_reply(0); \ 364 } \ 365 } \ 366 nfsm_dissect(tl, u_long *, NFSX_V3FH); \ 367 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 368 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 369 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 370 } 371 372#define nfsm_clget \ 373 if (bp >= be) { \ 374 if (mp == mb) \ 375 mp->m_len += bp-bpos; \ 376 MGET(mp, M_WAIT, MT_DATA); \ 377 MCLGET(mp, M_WAIT); \ 378 mp->m_len = NFSMSIZ(mp); \ 379 mp2->m_next = mp; \ 380 mp2 = mp; \ 381 bp = mtod(mp, caddr_t); \ 382 be = bp+mp->m_len; \ 383 } \ 384 tl = (u_long *)bp 385 386#define nfsm_srvfillattr(a, f) \ 387 nfsm_srvfattr(nfsd, (a), (f)) 388 389#define nfsm_srvwcc_data(br, b, ar, a) \ 390 nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos) 391 392#define nfsm_srvpostop_attr(r, a) \ 393 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 394 395#define nfsm_srvsattr(a) \ 396 { nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 397 if (*tl == nfs_true) { \ 398 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 399 (a)->va_mode = nfstov_mode(*tl); \ 400 } \ 401 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 402 if (*tl == nfs_true) { \ 403 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 404 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 405 } \ 406 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 407 if (*tl == nfs_true) { \ 408 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 409 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 410 } \ 411 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 412 if (*tl == nfs_true) { \ 413 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); \ 414 fxdr_hyper(tl, &(a)->va_size); \ 415 } \ 416 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 417 switch (fxdr_unsigned(int, *tl)) { \ 418 case NFSV3SATTRTIME_TOCLIENT: \ 419 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); \ 420 fxdr_nfsv3time(tl, &(a)->va_atime); \ 421 break; \ 422 case NFSV3SATTRTIME_TOSERVER: \ 423 (a)->va_atime.ts_sec = time.tv_sec; \ 424 (a)->va_atime.ts_nsec = time.tv_usec * 1000; \ 425 break; \ 426 }; \ 427 nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); \ 428 switch (fxdr_unsigned(int, *tl)) { \ 429 case NFSV3SATTRTIME_TOCLIENT: \ 430 nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); \ 431 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 432 break; \ 433 case NFSV3SATTRTIME_TOSERVER: \ 434 (a)->va_mtime.ts_sec = time.tv_sec; \ 435 (a)->va_mtime.ts_nsec = time.tv_usec * 1000; \ 436 break; \ 437 }; } 438 439#endif 440