nfsm_subs.h revision 1.41
1/* $OpenBSD: nfsm_subs.h,v 1.41 2009/08/04 17:12:39 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#define NFSMSIZ(m) (((m)->m_flags & M_EXT) ? (m)->m_ext.ext_size : \ 44 (((m)->m_flags & M_PKTHDR) ? MHLEN : MLEN)) 45 46struct nfsm_info { 47 struct mbuf *nmi_mreq; 48 struct mbuf *nmi_mrep; 49 50 struct proc *nmi_procp; /* XXX XXX XXX */ 51 struct ucred *nmi_cred; /* XXX XXX XXX */ 52 53 /* Setting up / Tearing down. */ 54 struct mbuf *nmi_md; 55 struct mbuf *nmi_mb; 56 caddr_t nmi_dpos; 57 58 int nmi_v3; 59}; 60 61#define nfsm_dissect(a, c, s) { \ 62 t1 = mtod(info.nmi_md, caddr_t) + info.nmi_md->m_len - \ 63 info.nmi_dpos; \ 64 if (t1 >= (s)) { \ 65 (a) = (c)(info.nmi_dpos); \ 66 info.nmi_dpos += (s); \ 67 } else if ((t1 = \ 68 nfsm_disct(&info.nmi_md, &info.nmi_dpos, (s), t1, \ 69 &cp2)) != 0) { \ 70 error = t1; \ 71 m_freem(info.nmi_mrep); \ 72 goto nfsmout; \ 73 } else { \ 74 (a) = (c)cp2; \ 75 } \ 76} 77 78#define nfsm_srvpostop_fh(f) { \ 79 tl = nfsm_build(&info.nmi_mb, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ 80 *tl++ = nfs_true; \ 81 *tl++ = txdr_unsigned(NFSX_V3FH); \ 82 bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ 83} 84 85#define nfsm_mtofh(d, v, v3, f) { \ 86 struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ 87 if (v3) { \ 88 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 89 (f) = fxdr_unsigned(int, *tl); \ 90 } else \ 91 (f) = 1; \ 92 if (f) { \ 93 nfsm_getfh(ttfhp, ttfhsize, (v3)); \ 94 if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ 95 &ttnp)) != 0) { \ 96 error = t1; \ 97 m_freem(info.nmi_mrep); \ 98 goto nfsmout; \ 99 } \ 100 (v) = NFSTOV(ttnp); \ 101 } \ 102 if (v3) { \ 103 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 104 if (f) \ 105 (f) = fxdr_unsigned(int, *tl); \ 106 else if (fxdr_unsigned(int, *tl)) \ 107 nfsm_adv(NFSX_V3FATTR); \ 108 } \ 109 if (f) \ 110 nfsm_loadattr((v), NULL); \ 111} 112 113#define nfsm_getfh(f, s, v3) { \ 114 if (v3) { \ 115 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 116 if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ 117 (s) > NFSX_V3FHMAX) { \ 118 m_freem(info.nmi_mrep); \ 119 error = EBADRPC; \ 120 goto nfsmout; \ 121 } \ 122 } else \ 123 (s) = NFSX_V2FH; \ 124 nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); \ 125} 126 127#define nfsm_loadattr(v, a) { \ 128 struct vnode *ttvp = (v); \ 129 if ((t1 = nfs_loadattrcache(&ttvp, &info.nmi_md, \ 130 &info.nmi_dpos, (a))) != 0) { \ 131 error = t1; \ 132 m_freem(info.nmi_mrep); \ 133 goto nfsmout; \ 134 } \ 135 (v) = ttvp; \ 136} 137 138#define nfsm_postop_attr(v, f) { if (info.nmi_mrep != NULL) { \ 139 struct vnode *ttvp = (v); \ 140 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 141 if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ 142 if ((t1 = nfs_loadattrcache(&ttvp, &info.nmi_md, \ 143 &info.nmi_dpos, NULL)) != 0) { \ 144 error = t1; \ 145 (f) = 0; \ 146 m_freem(info.nmi_mrep); \ 147 goto nfsmout; \ 148 } \ 149 (v) = ttvp; \ 150 } \ 151} } 152 153/* Used as (f) for nfsm_wcc_data() */ 154#define NFSV3_WCCRATTR 0 155#define NFSV3_WCCCHK 1 156 157#define nfsm_wcc_data(v, f) do { if (info.nmi_mrep != NULL) { \ 158 struct timespec _mtime; \ 159 int ttattrf, ttretf = 0; \ 160 \ 161 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 162 if (*tl == nfs_true) { \ 163 nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ 164 fxdr_nfsv3time(tl + 2, &_mtime); \ 165 if (f) { \ 166 ttretf = timespeccmp(&VTONFS(v)->n_mtime, \ 167 &_mtime, !=); \ 168 } \ 169 } \ 170 nfsm_postop_attr((v), ttattrf); \ 171 if (f) { \ 172 (f) = ttretf; \ 173 } else { \ 174 (f) = ttattrf; \ 175 } \ 176} } while (0) 177 178#define nfsm_strsiz(s,m) { \ 179 nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 180 if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ 181 m_freem(info.nmi_mrep); \ 182 error = EBADRPC; \ 183 goto nfsmout; \ 184 } \ 185} 186 187#define nfsm_srvnamesiz(s) { \ 188 nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ 189 if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ 190 error = NFSERR_NAMETOL; \ 191 if ((s) <= 0) \ 192 error = EBADRPC; \ 193 if (error) \ 194 nfsm_reply(0); \ 195} 196 197#define nfsm_mtouio(p,s) \ 198 if ((s) > 0 && \ 199 (t1 = nfsm_mbuftouio(&info.nmi_md,(p),(s), \ 200 &info.nmi_dpos)) != 0) { \ 201 error = t1; \ 202 m_freem(info.nmi_mrep); \ 203 goto nfsmout; \ 204 } 205 206#define nfsm_rndup(a) (((a)+3)&(~0x3)) 207 208#define nfsm_strtom(a,s,m) \ 209 if ((s) > (m)) { \ 210 m_freem(info.nmi_mreq); \ 211 error = ENAMETOOLONG; \ 212 goto nfsmout; \ 213 } \ 214 nfsm_strtombuf(&info.nmi_mb, (a), (s)) 215 216#define nfsm_reply(s) { \ 217 nfsd->nd_repstat = error; \ 218 if (error && !(nfsd->nd_flag & ND_NFSV3)) \ 219 (void) nfs_rephead(0, nfsd, slp, error, \ 220 &info.nmi_mreq, &info.nmi_mb); \ 221 else \ 222 (void) nfs_rephead((s), nfsd, slp, error, \ 223 &info.nmi_mreq, &info.nmi_mb); \ 224 if (info.nmi_mrep != NULL) { \ 225 m_freem(info.nmi_mrep); \ 226 info.nmi_mrep = NULL; \ 227 } \ 228 if (error && (!(nfsd->nd_flag & ND_NFSV3) || error == EBADRPC)) \ 229 return(0); \ 230} 231 232#define nfsm_writereply(s, v3) { \ 233 nfsd->nd_repstat = error; \ 234 if (error && !(v3)) \ 235 (void) nfs_rephead(0, nfsd, slp, error, &info.nmi_mreq, \ 236 &info.nmi_mb); \ 237 else \ 238 (void) nfs_rephead((s), nfsd, slp, error, &info.nmi_mreq, \ 239 &info.nmi_mb); \ 240} 241 242#define nfsm_adv(s) { \ 243 t1 = mtod(info.nmi_md, caddr_t) + info.nmi_md->m_len - \ 244 info.nmi_dpos; \ 245 if (t1 >= (s)) { \ 246 info.nmi_dpos += (s); \ 247 } else if ((t1 = nfs_adv(&info.nmi_md, &info.nmi_dpos, \ 248 (s), t1)) != 0) { \ 249 error = t1; \ 250 m_freem(info.nmi_mrep); \ 251 goto nfsmout; \ 252 } \ 253} 254 255#define nfsm_srvmtofh(f) { \ 256 if (nfsd->nd_flag & ND_NFSV3) { \ 257 nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ 258 if (fxdr_unsigned(int, *tl) != NFSX_V3FH) { \ 259 error = EBADRPC; \ 260 nfsm_reply(0); \ 261 } \ 262 } \ 263 nfsm_dissect(tl, u_int32_t *, NFSX_V3FH); \ 264 bcopy((caddr_t)tl, (caddr_t)(f), NFSX_V3FH); \ 265 if ((nfsd->nd_flag & ND_NFSV3) == 0) \ 266 nfsm_adv(NFSX_V2FH - NFSX_V3FH); \ 267} 268 269#endif 270