nfsm_subs.h revision 1.24
1/* $OpenBSD: nfsm_subs.h,v 1.24 2008/01/06 17:38:23 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_dissect(a, c, s) \ 72 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 73 if (t1 >= (s)) { \ 74 (a) = (c)(dpos); \ 75 dpos += (s); \ 76 } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ 77 error = t1; \ 78 m_freem(mrep); \ 79 goto nfsmout; \ 80 } else { \ 81 (a) = (c)cp2; \ 82 } } 83 84#define nfsm_fhtom(v, v3) \ 85 { if (v3) { \ 86 t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ 87 if (t2 <= M_TRAILINGSPACE(mb)) { \ 88 tl = nfsm_build(&mb, t2, &bpos); \ 89 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ 90 *(tl + ((t2>>2) - 2)) = 0; \ 91 bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \ 92 VTONFS(v)->n_fhsize); \ 93 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ 94 (caddr_t)VTONFS(v)->n_fhp, \ 95 VTONFS(v)->n_fhsize)) != 0) { \ 96 error = t2; \ 97 m_freem(mreq); \ 98 goto nfsmout; \ 99 } \ 100 } else { \ 101 cp = nfsm_build(&mb, NFSX_V2FH, &bpos); \ 102 bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \ 103 } } 104 105#define nfsm_srvfhtom(f, v3) \ 106 { if (v3) { \ 107 tl = nfsm_build(&mb, NFSX_UNSIGNED + NFSX_V3FH,&bpos); \ 108 *tl++ = txdr_unsigned(NFSX_V3FH); \ 109 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 110 } else { \ 111 cp = nfsm_build(&mb, NFSX_V2FH, &bpos); \ 112 bcopy((caddr_t)(f), cp, NFSX_V2FH); \ 113 } } 114 115#define nfsm_srvpostop_fh(f) \ 116 { tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED + NFSX_V3FH, &bpos); \ 117 *tl++ = nfs_true; \ 118 *tl++ = txdr_unsigned(NFSX_V3FH); \ 119 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 120 } 121 122#define nfsm_mtofh(d, v, v3, f) \ 123 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 124 if (v3) { \ 125 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 126 (f) = fxdr_unsigned(int, *tl); \ 127 } else \ 128 (f) = 1; \ 129 if (f) { \ 130 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 131 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 132 &ttnp)) != 0) { \ 133 error = t1; \ 134 m_freem(mrep); \ 135 goto nfsmout; \ 136 } \ 137 (v) = NFSTOV(ttnp); \ 138 } \ 139 if (v3) { \ 140 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 141 if (f) \ 142 (f) = fxdr_unsigned(int, *tl); \ 143 else if (fxdr_unsigned(int, *tl)) \ 144 nfsm_adv(NFSX_V3FATTR); \ 145 } \ 146 if (f) \ 147 nfsm_loadattr((v), (struct vattr *)0); \ 148 } 149 150#define nfsm_getfh(f, s, v3) \ 151 { if (v3) { \ 152 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 153 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 154 (s) > NFSX_V3FHMAX) { \ 155 m_freem(mrep); \ 156 error = EBADRPC; \ 157 goto nfsmout; \ 158 } \ 159 } else \ 160 (s) = NFSX_V2FH; \ 161 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 162 163#define nfsm_loadattr(v, a) \ 164 { struct vnode *ttvp = (v); \ 165 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 166 error = t1; \ 167 m_freem(mrep); \ 168 goto nfsmout; \ 169 } \ 170 (v) = ttvp; } 171 172#define nfsm_postop_attr(v, f) \ 173 { struct vnode *ttvp = (v); \ 174 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 175 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 176 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 177 (struct vattr *)0)) != 0) { \ 178 error = t1; \ 179 (f) = 0; \ 180 m_freem(mrep); \ 181 goto nfsmout; \ 182 } \ 183 (v) = ttvp; \ 184 } } 185 186/* Used as (f) for nfsm_wcc_data() */ 187#define NFSV3_WCCRATTR 0 188#define NFSV3_WCCCHK 1 189 190#define nfsm_wcc_data(v, f) \ 191 { int ttattrf, ttretf = 0; \ 192 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 193 if (*tl == nfs_true) { \ 194 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 195 if (f) \ 196 ttretf = (VTONFS(v)->n_mtime == \ 197 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 198 } \ 199 nfsm_postop_attr((v), ttattrf); \ 200 if (f) { \ 201 (f) = ttretf; \ 202 } else { \ 203 (f) = ttattrf; \ 204 } } 205 206#define nfsm_strsiz(s,m) \ 207 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 208 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 209 m_freem(mrep); \ 210 error = EBADRPC; \ 211 goto nfsmout; \ 212 } } 213 214#define nfsm_srvstrsiz(s,m) \ 215 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 216 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 217 error = EBADRPC; \ 218 nfsm_reply(0); \ 219 } } 220 221#define nfsm_srvnamesiz(s) \ 222 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 223 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 224 error = NFSERR_NAMETOL; \ 225 if ((s) <= 0) \ 226 error = EBADRPC; \ 227 if (error) \ 228 nfsm_reply(0); \ 229 } 230 231#define nfsm_mtouio(p,s) \ 232 if ((s) > 0 && \ 233 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 234 error = t1; \ 235 m_freem(mrep); \ 236 goto nfsmout; \ 237 } 238 239#define nfsm_reqhead(v,a,s) \ 240 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 241 242#define nfsm_rndup(a) (((a)+3)&(~0x3)) 243 244#define nfsm_request(v, t, p, c) \ 245 if ((error = nfs_request((v), mreq, (t), (p), \ 246 (c), &mrep, &md, &dpos)) != 0) { \ 247 if (error & NFSERR_RETERR) \ 248 error &= ~NFSERR_RETERR; \ 249 else \ 250 goto nfsmout; \ 251 } 252 253#define nfsm_strtom(a,s,m) \ 254 if ((s) > (m)) { \ 255 m_freem(mreq); \ 256 error = ENAMETOOLONG; \ 257 goto nfsmout; \ 258 } \ 259 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 260 if (t2 <= M_TRAILINGSPACE(mb)) { \ 261 tl = nfsm_build(&mb, t2, &bpos); \ 262 *tl++ = txdr_unsigned(s); \ 263 *(tl+((t2>>2)-2)) = 0; \ 264 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 265 } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ 266 error = t2; \ 267 m_freem(mreq); \ 268 goto nfsmout; \ 269 } 270 271#define nfsm_reply(s) \ 272 { \ 273 nfsd->nd_repstat = error; \ 274 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 275 (void) nfs_rephead(0, nfsd, slp, error, \ 276 mrq, &mb, &bpos); \ 277 else \ 278 (void) nfs_rephead((s), nfsd, slp, error, \ 279 mrq, &mb, &bpos); \ 280 if (mrep != NULL) { \ 281 m_freem(mrep); \ 282 mrep = NULL; \ 283 } \ 284 mreq = *mrq; \ 285 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 286 error == EBADRPC)) \ 287 return(0); \ 288 } 289 290#define nfsm_writereply(s, v3) \ 291 { \ 292 nfsd->nd_repstat = error; \ 293 if (error && !(v3)) \ 294 (void) nfs_rephead(0, nfsd, slp, error, \ 295 &mreq, &mb, &bpos); \ 296 else \ 297 (void) nfs_rephead((s), nfsd, slp, error, \ 298 &mreq, &mb, &bpos); \ 299 } 300 301#define nfsm_adv(s) \ 302 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 303 if (t1 >= (s)) { \ 304 dpos += (s); \ 305 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 306 error = t1; \ 307 m_freem(mrep); \ 308 goto nfsmout; \ 309 } } 310 311#define nfsm_srvmtofh(f) \ 312 { if (nfsd->nd_flag & ND_NFSV3) { \ 313 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 314 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 315 error = EBADRPC; \ 316 nfsm_reply(0); \ 317 } \ 318 } \ 319 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 320 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 321 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 322 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 323 } 324 325#define nfsm_clget \ 326 if (bp >= be) { \ 327 if (mp == mb) \ 328 mp->m_len += bp-bpos; \ 329 MGET(mp, M_WAIT, MT_DATA); \ 330 MCLGET(mp, M_WAIT); \ 331 mp->m_len = NFSMSIZ(mp); \ 332 mp2->m_next = mp; \ 333 mp2 = mp; \ 334 bp = mtod(mp, caddr_t); \ 335 be = bp+mp->m_len; \ 336 } \ 337 tl = (u_int32_t *)bp 338 339#define nfsm_srvpostop_attr(r, a) \ 340 nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos) 341 342#define nfsm_srvsattr(a) \ 343 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 344 if (*tl == nfs_true) { \ 345 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 346 (a)->va_mode = nfstov_mode(*tl); \ 347 } \ 348 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 349 if (*tl == nfs_true) { \ 350 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 351 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 352 } \ 353 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 354 if (*tl == nfs_true) { \ 355 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 356 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 357 } \ 358 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 359 if (*tl == nfs_true) { \ 360 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 361 (a)->va_size = fxdr_hyper(tl); \ 362 } \ 363 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 364 switch (fxdr_unsigned(int, *tl)) { \ 365 case NFSV3SATTRTIME_TOCLIENT: \ 366 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 367 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 368 fxdr_nfsv3time(tl, &(a)->va_atime); \ 369 break; \ 370 case NFSV3SATTRTIME_TOSERVER: \ 371 getnanotime(&(a)->va_atime); \ 372 break; \ 373 }; \ 374 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 375 switch (fxdr_unsigned(int, *tl)) { \ 376 case NFSV3SATTRTIME_TOCLIENT: \ 377 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 378 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 379 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 380 break; \ 381 case NFSV3SATTRTIME_TOSERVER: \ 382 getnanotime(&(a)->va_mtime); \ 383 break; \ 384 }; } 385 386#endif 387