nfsm_subs.h revision 1.40
1/* $OpenBSD: nfsm_subs.h,v 1.40 2009/07/30 14:04:28 thib 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 NFSMSIZ(m) ((M_HASCL(m)) ? (m)->m_ext.ext_size : \ 55 (((m)->m_flags & M_PKTHDR) ? MHLEN : MLEN)) 56 57/* 58 * Now for the macros that do the simple stuff and call the functions 59 * for the hard stuff. 60 * These macros use several vars. declared in nfsm_reqhead and these 61 * vars. must not be used elsewhere unless you are careful not to corrupt 62 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 63 * that may be used so long as the value is not expected to retained 64 * after a macro. 65 * I know, this is kind of dorkey, but it makes the actual op functions 66 * fairly clean and deals with the mess caused by the xdr discriminating 67 * unions. 68 */ 69 70#define nfsm_dissect(a, c, s) { \ 71 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 72 if (t1 >= (s)) { \ 73 (a) = (c)(dpos); \ 74 dpos += (s); \ 75 } else if ((t1 = \ 76 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 85#define nfsm_srvpostop_fh(f) { \ 86 tl = nfsm_build(&mb, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 87 *tl++ = nfs_true; \ 88 *tl++ = txdr_unsigned(NFSX_V3FH); \ 89 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 90} 91 92#define nfsm_mtofh(d, v, v3, f) { \ 93 struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 94 if (v3) { \ 95 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 96 (f) = fxdr_unsigned(int, *tl); \ 97 } else \ 98 (f) = 1; \ 99 if (f) { \ 100 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 101 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 102 &ttnp)) != 0) { \ 103 error = t1; \ 104 m_freem(mrep); \ 105 goto nfsmout; \ 106 } \ 107 (v) = NFSTOV(ttnp); \ 108 } \ 109 if (v3) { \ 110 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 111 if (f) \ 112 (f) = fxdr_unsigned(int, *tl); \ 113 else if (fxdr_unsigned(int, *tl)) \ 114 nfsm_adv(NFSX_V3FATTR); \ 115 } \ 116 if (f) \ 117 nfsm_loadattr((v), NULL); \ 118} 119 120#define nfsm_getfh(f, s, v3) { \ 121 if (v3) { \ 122 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 123 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 124 (s) > NFSX_V3FHMAX) { \ 125 m_freem(mrep); \ 126 error = EBADRPC; \ 127 goto nfsmout; \ 128 } \ 129 } else \ 130 (s) = NFSX_V2FH; \ 131 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); \ 132} 133 134#define nfsm_loadattr(v, a) { \ 135 struct vnode *ttvp = (v); \ 136 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ 137 error = t1; \ 138 m_freem(mrep); \ 139 goto nfsmout; \ 140 } \ 141 (v) = ttvp; \ 142} 143 144#define nfsm_postop_attr(v, f) { if (mrep != NULL) { \ 145 struct vnode *ttvp = (v); \ 146 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 147 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 148 if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ 149 NULL)) != 0) { \ 150 error = t1; \ 151 (f) = 0; \ 152 m_freem(mrep); \ 153 goto nfsmout; \ 154 } \ 155 (v) = ttvp; \ 156 } \ 157} } 158 159/* Used as (f) for nfsm_wcc_data() */ 160#define NFSV3_WCCRATTR 0 161#define NFSV3_WCCCHK 1 162 163#define nfsm_wcc_data(v, f) do { if (mrep != NULL) { \ 164 struct timespec _mtime; \ 165 int ttattrf, ttretf = 0; \ 166 \ 167 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 168 if (*tl == nfs_true) { \ 169 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 170 fxdr_nfsv3time(tl + 2, &_mtime); \ 171 if (f) { \ 172 ttretf = timespeccmp(&VTONFS(v)->n_mtime, \ 173 &_mtime, !=); \ 174 } \ 175 } \ 176 nfsm_postop_attr((v), ttattrf); \ 177 if (f) { \ 178 (f) = ttretf; \ 179 } else { \ 180 (f) = ttattrf; \ 181 } \ 182} } while (0) 183 184#define nfsm_strsiz(s,m) { \ 185 nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 186 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 187 m_freem(mrep); \ 188 error = EBADRPC; \ 189 goto nfsmout; \ 190 } \ 191} 192 193#define nfsm_srvnamesiz(s) { \ 194 nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 195 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 196 error = NFSERR_NAMETOL; \ 197 if ((s) <= 0) \ 198 error = EBADRPC; \ 199 if (error) \ 200 nfsm_reply(0); \ 201} 202 203#define nfsm_mtouio(p,s) \ 204 if ((s) > 0 && \ 205 (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ 206 error = t1; \ 207 m_freem(mrep); \ 208 goto nfsmout; \ 209 } 210 211#define nfsm_rndup(a) (((a)+3)&(~0x3)) 212 213#define nfsm_strtom(a,s,m) \ 214 if ((s) > (m)) { \ 215 m_freem(mreq); \ 216 error = ENAMETOOLONG; \ 217 goto nfsmout; \ 218 } \ 219 nfsm_strtombuf(&mb, (a), (s)) 220 221#define nfsm_reply(s) { \ 222 nfsd->nd_repstat = error; \ 223 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 224 (void) nfs_rephead(0, nfsd, slp, error, \ 225 mrq, &mb); \ 226 else \ 227 (void) nfs_rephead((s), nfsd, slp, error, \ 228 mrq, &mb); \ 229 if (mrep != NULL) { \ 230 m_freem(mrep); \ 231 mrep = NULL; \ 232 } \ 233 mreq = *mrq; \ 234 if (error && (!(nfsd->nd_flag & ND_NFSV3) || error == EBADRPC)) \ 235 return(0); \ 236} 237 238#define nfsm_writereply(s, v3) { \ 239 nfsd->nd_repstat = error; \ 240 if (error && !(v3)) \ 241 (void) nfs_rephead(0, nfsd, slp, error, &mreq, &mb); \ 242 else \ 243 (void) nfs_rephead((s), nfsd, slp, error, &mreq, &mb); \ 244} 245 246#define nfsm_adv(s) { \ 247 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 248 if (t1 >= (s)) { \ 249 dpos += (s); \ 250 } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ 251 error = t1; \ 252 m_freem(mrep); \ 253 goto nfsmout; \ 254 } \ 255} 256 257#define nfsm_srvmtofh(f) { \ 258 if (nfsd->nd_flag & ND_NFSV3) { \ 259 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 260 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 261 error = EBADRPC; \ 262 nfsm_reply(0); \ 263 } \ 264 } \ 265 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 266 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 267 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 268 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 269} 270 271#endif 272