nfsm_subs.h revision 1.23
1/* $OpenBSD: nfsm_subs.h,v 1.23 2007/12/13 18:32:55 blambert Exp $ */ 2/* $NetBSD: nfsm_subs.h,v 1.10 1996/03/20 21:59:56 fvdl Exp $ */ 3 4/* 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Rick Macklem at The University of Guelph. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95 36 */ 37 38 39#ifndef _NFS_NFSM_SUBS_H_ 40#define _NFS_NFSM_SUBS_H_ 41 42 43/* 44 * These macros do strange and peculiar things to mbuf chains for 45 * the assistance of the nfs code. To attempt to use them for any 46 * other purpose will be dangerous. (they make weird assumptions) 47 */ 48 49/* 50 * First define what the actual subs. return 51 */ 52 53#define M_HASCL(m) ((m)->m_flags & M_EXT) 54#define NFSMADV(m, s) (m)->m_data += (s) 55#define NFSMSIZ(m) ((M_HASCL(m)) ? (m)->m_ext.ext_size : \ 56 (((m)->m_flags & M_PKTHDR) ? MHLEN : MLEN)) 57 58/* 59 * Now for the macros that do the simple stuff and call the functions 60 * for the hard stuff. 61 * These macros use several vars. declared in nfsm_reqhead and these 62 * vars. must not be used elsewhere unless you are careful not to corrupt 63 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 64 * that may be used so long as the value is not expected to retained 65 * after a macro. 66 * I know, this is kind of dorkey, but it makes the actual op functions 67 * fairly clean and deals with the mess caused by the xdr discriminating 68 * unions. 69 */ 70 71#define nfsm_build(a,c,s) \ 72 { if ((s) > M_TRAILINGSPACE(mb)) { \ 73 MGET(mb2, M_WAIT, MT_DATA); \ 74 if ((s) > MLEN) \ 75 panic("build > MLEN"); \ 76 mb->m_next = mb2; \ 77 mb = mb2; \ 78 mb->m_len = 0; \ 79 bpos = mtod(mb, caddr_t); \ 80 } \ 81 (a) = (c)(bpos); \ 82 mb->m_len += (s); \ 83 bpos += (s); } 84 85#define nfsm_dissect(a, c, s) \ 86 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 87 if (t1 >= (s)) { \ 88 (a) = (c)(dpos); \ 89 dpos += (s); \ 90 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 91 error = t1; \ 92 m_freem(mrep); \ 93 goto nfsmout; \ 94 } else { \ 95 (a) = (c)cp2; \ 96 } } 97 98#define nfsm_fhtom(v, v3) \ 99 { if (v3) { \ 100 t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ 101 if (t2 <= M_TRAILINGSPACE(mb)) { \ 102 nfsm_build(tl, u_int32_t *, t2); \ 103 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ 104 *(tl + ((t2>>2) - 2)) = 0; \ 105 bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \ 106 VTONFS(v)->n_fhsize); \ 107 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ 108 (caddr_t)VTONFS(v)->n_fhp, \ 109 VTONFS(v)->n_fhsize)) != 0) { \ 110 error = t2; \ 111 m_freem(mreq); \ 112 goto nfsmout; \ 113 } \ 114 } else { \ 115 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 116 bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \ 117 } } 118 119#define nfsm_srvfhtom(f, v3) \ 120 { if (v3) { \ 121 nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH); \ 122 *tl++ = txdr_unsigned(NFSX_V3FH); \ 123 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 124 } else { \ 125 nfsm_build(cp, caddr_t, NFSX_V2FH); \ 126 bcopy((caddr_t)(f), cp, NFSX_V2FH); \ 127 } } 128 129#define nfsm_srvpostop_fh(f) \ 130 { nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 131 *tl++ = nfs_true; \ 132 *tl++ = txdr_unsigned(NFSX_V3FH); \ 133 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 134 } 135 136#define nfsm_mtofh(d, v, v3, f) \ 137 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 138 if (v3) { \ 139 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 140 (f) = fxdr_unsigned(int, *tl); \ 141 } else \ 142 (f) = 1; \ 143 if (f) { \ 144 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 145 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 146 &ttnp)) != 0) { \ 147 error = t1; \ 148 m_freem(mrep); \ 149 goto nfsmout; \ 150 } \ 151 (v) = NFSTOV(ttnp); \ 152 } \ 153 if (v3) { \ 154 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 155 if (f) \ 156 (f) = fxdr_unsigned(int, *tl); \ 157 else if (fxdr_unsigned(int, *tl)) \ 158 nfsm_adv(NFSX_V3FATTR); \ 159 } \ 160 if (f) \ 161 nfsm_loadattr((v), (struct vattr *)0); \ 162 } 163 164#define nfsm_getfh(f, s, v3) \ 165 { if (v3) { \ 166 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 167 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 168 (s) > NFSX_V3FHMAX) { \ 169 m_freem(mrep); \ 170 error = EBADRPC; \ 171 goto nfsmout; \ 172 } \ 173 } else \ 174 (s) = NFSX_V2FH; \ 175 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 176 177#define nfsm_loadattr(v, a) \ 178 { struct vnode *ttvp = (v); \ 179 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 180 error = t1; \ 181 m_freem(mrep); \ 182 goto nfsmout; \ 183 } \ 184 (v) = ttvp; } 185 186#define nfsm_postop_attr(v, f) \ 187 { struct vnode *ttvp = (v); \ 188 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 189 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 190 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 191 (struct vattr *)0)) != 0) { \ 192 error = t1; \ 193 (f) = 0; \ 194 m_freem(mrep); \ 195 goto nfsmout; \ 196 } \ 197 (v) = ttvp; \ 198 } } 199 200/* Used as (f) for nfsm_wcc_data() */ 201#define NFSV3_WCCRATTR 0 202#define NFSV3_WCCCHK 1 203 204#define nfsm_wcc_data(v, f) \ 205 { int ttattrf, ttretf = 0; \ 206 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 207 if (*tl == nfs_true) { \ 208 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 209 if (f) \ 210 ttretf = (VTONFS(v)->n_mtime == \ 211 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 212 } \ 213 nfsm_postop_attr((v), ttattrf); \ 214 if (f) { \ 215 (f) = ttretf; \ 216 } else { \ 217 (f) = ttattrf; \ 218 } } 219 220#define nfsm_strsiz(s,m) \ 221 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 222 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 223 m_freem(mrep); \ 224 error = EBADRPC; \ 225 goto nfsmout; \ 226 } } 227 228#define nfsm_srvstrsiz(s,m) \ 229 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 230 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 231 error = EBADRPC; \ 232 nfsm_reply(0); \ 233 } } 234 235#define nfsm_srvnamesiz(s) \ 236 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 237 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 238 error = NFSERR_NAMETOL; \ 239 if ((s) <= 0) \ 240 error = EBADRPC; \ 241 if (error) \ 242 nfsm_reply(0); \ 243 } 244 245#define nfsm_mtouio(p,s) \ 246 if ((s) > 0 && \ 247 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 248 error = t1; \ 249 m_freem(mrep); \ 250 goto nfsmout; \ 251 } 252 253#define nfsm_reqhead(v,a,s) \ 254 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 255 256#define nfsm_rndup(a) (((a)+3)&(~0x3)) 257 258#define nfsm_request(v, t, p, c) \ 259 if ((error = nfs_request((v), mreq, (t), (p), \ 260 (c), &mrep, &md, &dpos)) != 0) { \ 261 if (error & NFSERR_RETERR) \ 262 error &= ~NFSERR_RETERR; \ 263 else \ 264 goto nfsmout; \ 265 } 266 267#define nfsm_strtom(a,s,m) \ 268 if ((s) > (m)) { \ 269 m_freem(mreq); \ 270 error = ENAMETOOLONG; \ 271 goto nfsmout; \ 272 } \ 273 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 274 if (t2 <= M_TRAILINGSPACE(mb)) { \ 275 nfsm_build(tl,u_int32_t *,t2); \ 276 *tl++ = txdr_unsigned(s); \ 277 *(tl+((t2>>2)-2)) = 0; \ 278 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 279 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 280 error = t2; \ 281 m_freem(mreq); \ 282 goto nfsmout; \ 283 } 284 285#define nfsm_reply(s) \ 286 { \ 287 nfsd->nd_repstat = error; \ 288 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 289 (void) nfs_rephead(0, nfsd, slp, error, \ 290 mrq, &mb, &bpos); \ 291 else \ 292 (void) nfs_rephead((s), nfsd, slp, error, \ 293 mrq, &mb, &bpos); \ 294 if (mrep != NULL) { \ 295 m_freem(mrep); \ 296 mrep = NULL; \ 297 } \ 298 mreq = *mrq; \ 299 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 300 error == EBADRPC)) \ 301 return(0); \ 302 } 303 304#define nfsm_writereply(s, v3) \ 305 { \ 306 nfsd->nd_repstat = error; \ 307 if (error && !(v3)) \ 308 (void) nfs_rephead(0, nfsd, slp, error, \ 309 &mreq, &mb, &bpos); \ 310 else \ 311 (void) nfs_rephead((s), nfsd, slp, error, \ 312 &mreq, &mb, &bpos); \ 313 } 314 315#define nfsm_adv(s) \ 316 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 317 if (t1 >= (s)) { \ 318 dpos += (s); \ 319 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 320 error = t1; \ 321 m_freem(mrep); \ 322 goto nfsmout; \ 323 } } 324 325#define nfsm_srvmtofh(f) \ 326 { if (nfsd->nd_flag & ND_NFSV3) { \ 327 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 328 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 329 error = EBADRPC; \ 330 nfsm_reply(0); \ 331 } \ 332 } \ 333 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 334 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 335 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 336 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 337 } 338 339#define nfsm_clget \ 340 if (bp >= be) { \ 341 if (mp == mb) \ 342 mp->m_len += bp-bpos; \ 343 MGET(mp, M_WAIT, MT_DATA); \ 344 MCLGET(mp, M_WAIT); \ 345 mp->m_len = NFSMSIZ(mp); \ 346 mp2->m_next = mp; \ 347 mp2 = mp; \ 348 bp = mtod(mp, caddr_t); \ 349 be = bp+mp->m_len; \ 350 } \ 351 tl = (u_int32_t *)bp 352 353#define nfsm_srvpostop_attr(r, a) \ 354 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 355 356#define nfsm_srvsattr(a) \ 357 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 358 if (*tl == nfs_true) { \ 359 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 360 (a)->va_mode = nfstov_mode(*tl); \ 361 } \ 362 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 363 if (*tl == nfs_true) { \ 364 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 365 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 366 } \ 367 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 368 if (*tl == nfs_true) { \ 369 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 370 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 371 } \ 372 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 373 if (*tl == nfs_true) { \ 374 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 375 (a)->va_size = fxdr_hyper(tl); \ 376 } \ 377 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 378 switch (fxdr_unsigned(int, *tl)) { \ 379 case NFSV3SATTRTIME_TOCLIENT: \ 380 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 381 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 382 fxdr_nfsv3time(tl, &(a)->va_atime); \ 383 break; \ 384 case NFSV3SATTRTIME_TOSERVER: \ 385 getnanotime(&(a)->va_atime); \ 386 break; \ 387 }; \ 388 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 389 switch (fxdr_unsigned(int, *tl)) { \ 390 case NFSV3SATTRTIME_TOCLIENT: \ 391 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 392 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 393 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 394 break; \ 395 case NFSV3SATTRTIME_TOSERVER: \ 396 getnanotime(&(a)->va_mtime); \ 397 break; \ 398 }; } 399 400#endif 401