nfsm_subs.h revision 1.30
1/* $OpenBSD: nfsm_subs.h,v 1.30 2008/06/14 22:44:07 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 nfsm_strtombuf(&mb, VTONFS(v)->n_fhp, \ 87 VTONFS(v)->n_fhsize); \ 88 } else { \ 89 nfsm_buftombuf(&mb, VTONFS(v)->n_fhp, NFSX_V2FH); \ 90 } } 91 92#define nfsm_srvfhtom(f, v3) \ 93 { if (v3) { \ 94 nfsm_strtombuf(&mb, (f), NFSX_V3FH); \ 95 } else { \ 96 nfsm_buftombuf(&mb, (f), NFSX_V2FH); \ 97 } } 98 99#define nfsm_srvpostop_fh(f) \ 100 { tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 101 *tl++ = nfs_true; \ 102 *tl++ = txdr_unsigned(NFSX_V3FH); \ 103 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 104 } 105 106#define nfsm_mtofh(d, v, v3, f) \ 107 { struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 108 if (v3) { \ 109 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 110 (f) = fxdr_unsigned(int, *tl); \ 111 } else \ 112 (f) = 1; \ 113 if (f) { \ 114 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 115 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 116 &ttnp)) != 0) { \ 117 error = t1; \ 118 m_freem(mrep); \ 119 goto nfsmout; \ 120 } \ 121 (v) = NFSTOV(ttnp); \ 122 } \ 123 if (v3) { \ 124 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 125 if (f) \ 126 (f) = fxdr_unsigned(int, *tl); \ 127 else if (fxdr_unsigned(int, *tl)) \ 128 nfsm_adv(NFSX_V3FATTR); \ 129 } \ 130 if (f) \ 131 nfsm_loadattr((v), (struct vattr *)0); \ 132 } 133 134#define nfsm_getfh(f, s, v3) \ 135 { if (v3) { \ 136 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 137 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 138 (s) > NFSX_V3FHMAX) { \ 139 m_freem(mrep); \ 140 error = EBADRPC; \ 141 goto nfsmout; \ 142 } \ 143 } else \ 144 (s) = NFSX_V2FH; \ 145 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); } 146 147#define nfsm_loadattr(v, a) \ 148 { struct vnode *ttvp = (v); \ 149 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 150 error = t1; \ 151 m_freem(mrep); \ 152 goto nfsmout; \ 153 } \ 154 (v) = ttvp; } 155 156#define nfsm_postop_attr(v, f) \ 157 { struct vnode *ttvp = (v); \ 158 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 159 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 160 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 161 (struct vattr *)0)) != 0) { \ 162 error = t1; \ 163 (f) = 0; \ 164 m_freem(mrep); \ 165 goto nfsmout; \ 166 } \ 167 (v) = ttvp; \ 168 } } 169 170/* Used as (f) for nfsm_wcc_data() */ 171#define NFSV3_WCCRATTR 0 172#define NFSV3_WCCCHK 1 173 174#define nfsm_wcc_data(v, f) \ 175 { int ttattrf, ttretf = 0; \ 176 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 177 if (*tl == nfs_true) { \ 178 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 179 if (f) \ 180 ttretf = (VTONFS(v)->n_mtime == \ 181 fxdr_unsigned(u_int32_t, *(tl + 2))); \ 182 } \ 183 nfsm_postop_attr((v), ttattrf); \ 184 if (f) { \ 185 (f) = ttretf; \ 186 } else { \ 187 (f) = ttattrf; \ 188 } } 189 190#define nfsm_strsiz(s,m) \ 191 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 192 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 193 m_freem(mrep); \ 194 error = EBADRPC; \ 195 goto nfsmout; \ 196 } } 197 198#define nfsm_srvstrsiz(s,m) \ 199 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 200 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ 201 error = EBADRPC; \ 202 nfsm_reply(0); \ 203 } } 204 205#define nfsm_srvnamesiz(s) \ 206 { nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 207 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 208 error = NFSERR_NAMETOL; \ 209 if ((s) <= 0) \ 210 error = EBADRPC; \ 211 if (error) \ 212 nfsm_reply(0); \ 213 } 214 215#define nfsm_mtouio(p,s) \ 216 if ((s) > 0 && \ 217 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 218 error = t1; \ 219 m_freem(mrep); \ 220 goto nfsmout; \ 221 } 222 223#define nfsm_rndup(a) (((a)+3)&(~0x3)) 224 225#define nfsm_request(v, t, p, c) \ 226 if ((error = nfs_request((v), mreq, (t), (p), \ 227 (c), &mrep, &md, &dpos)) != 0) { \ 228 if (error & NFSERR_RETERR) \ 229 error &= ~NFSERR_RETERR; \ 230 else \ 231 goto nfsmout; \ 232 } 233 234#define nfsm_strtom(a,s,m) \ 235 if ((s) > (m)) { \ 236 m_freem(mreq); \ 237 error = ENAMETOOLONG; \ 238 goto nfsmout; \ 239 } \ 240 nfsm_strtombuf(&mb, (a), (s)) 241 242#define nfsm_reply(s) \ 243 { \ 244 nfsd->nd_repstat = error; \ 245 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 246 (void) nfs_rephead(0, nfsd, slp, error, \ 247 mrq, &mb); \ 248 else \ 249 (void) nfs_rephead((s), nfsd, slp, error, \ 250 mrq, &mb); \ 251 if (mrep != NULL) { \ 252 m_freem(mrep); \ 253 mrep = NULL; \ 254 } \ 255 mreq = *mrq; \ 256 if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ 257 error == EBADRPC)) \ 258 return(0); \ 259 } 260 261#define nfsm_writereply(s, v3) \ 262 { \ 263 nfsd->nd_repstat = error; \ 264 if (error && !(v3)) \ 265 (void) nfs_rephead(0, nfsd, slp, error, \ 266 &mreq, &mb); \ 267 else \ 268 (void) nfs_rephead((s), nfsd, slp, error, \ 269 &mreq, &mb); \ 270 } 271 272#define nfsm_adv(s) \ 273 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 274 if (t1 >= (s)) { \ 275 dpos += (s); \ 276 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 277 error = t1; \ 278 m_freem(mrep); \ 279 goto nfsmout; \ 280 } } 281 282#define nfsm_srvmtofh(f) \ 283 { if (nfsd->nd_flag & ND_NFSV3) { \ 284 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 285 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 286 error = EBADRPC; \ 287 nfsm_reply(0); \ 288 } \ 289 } \ 290 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 291 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 292 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 293 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 294 } 295 296#define nfsm_srvsattr(a) \ 297 { nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 298 if (*tl == nfs_true) { \ 299 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 300 (a)->va_mode = nfstov_mode(*tl); \ 301 } \ 302 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 303 if (*tl == nfs_true) { \ 304 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 305 (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ 306 } \ 307 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 308 if (*tl == nfs_true) { \ 309 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 310 (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ 311 } \ 312 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 313 if (*tl == nfs_true) { \ 314 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 315 (a)->va_size = fxdr_hyper(tl); \ 316 } \ 317 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 318 switch (fxdr_unsigned(int, *tl)) { \ 319 case NFSV3SATTRTIME_TOCLIENT: \ 320 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 321 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 322 fxdr_nfsv3time(tl, &(a)->va_atime); \ 323 break; \ 324 case NFSV3SATTRTIME_TOSERVER: \ 325 getnanotime(&(a)->va_atime); \ 326 break; \ 327 }; \ 328 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 329 switch (fxdr_unsigned(int, *tl)) { \ 330 case NFSV3SATTRTIME_TOCLIENT: \ 331 (a)->va_vaflags &= ~VA_UTIMES_NULL; \ 332 nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ 333 fxdr_nfsv3time(tl, &(a)->va_mtime); \ 334 break; \ 335 case NFSV3SATTRTIME_TOSERVER: \ 336 getnanotime(&(a)->va_mtime); \ 337 break; \ 338 }; } 339 340#endif 341