19ec7b004SRick Macklem /*- 29ec7b004SRick Macklem * Copyright (c) 1989, 1993 39ec7b004SRick Macklem * The Regents of the University of California. All rights reserved. 49ec7b004SRick Macklem * 59ec7b004SRick Macklem * This code is derived from software contributed to Berkeley by 69ec7b004SRick Macklem * Rick Macklem at The University of Guelph. 79ec7b004SRick Macklem * 89ec7b004SRick Macklem * Redistribution and use in source and binary forms, with or without 99ec7b004SRick Macklem * modification, are permitted provided that the following conditions 109ec7b004SRick Macklem * are met: 119ec7b004SRick Macklem * 1. Redistributions of source code must retain the above copyright 129ec7b004SRick Macklem * notice, this list of conditions and the following disclaimer. 139ec7b004SRick Macklem * 2. Redistributions in binary form must reproduce the above copyright 149ec7b004SRick Macklem * notice, this list of conditions and the following disclaimer in the 159ec7b004SRick Macklem * documentation and/or other materials provided with the distribution. 169ec7b004SRick Macklem * 4. Neither the name of the University nor the names of its contributors 179ec7b004SRick Macklem * may be used to endorse or promote products derived from this software 189ec7b004SRick Macklem * without specific prior written permission. 199ec7b004SRick Macklem * 209ec7b004SRick Macklem * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 219ec7b004SRick Macklem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 229ec7b004SRick Macklem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 239ec7b004SRick Macklem * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 249ec7b004SRick Macklem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 259ec7b004SRick Macklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 269ec7b004SRick Macklem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 279ec7b004SRick Macklem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 289ec7b004SRick Macklem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 299ec7b004SRick Macklem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 309ec7b004SRick Macklem * SUCH DAMAGE. 319ec7b004SRick Macklem * 329ec7b004SRick Macklem * $FreeBSD$ 339ec7b004SRick Macklem */ 349ec7b004SRick Macklem 359ec7b004SRick Macklem #ifndef _NFS_NFSM_SUBS_H_ 369ec7b004SRick Macklem #define _NFS_NFSM_SUBS_H_ 379ec7b004SRick Macklem 389ec7b004SRick Macklem 399ec7b004SRick Macklem /* 409ec7b004SRick Macklem * These macros do strange and peculiar things to mbuf chains for 419ec7b004SRick Macklem * the assistance of the nfs code. To attempt to use them for any 429ec7b004SRick Macklem * other purpose will be dangerous. (they make weird assumptions) 439ec7b004SRick Macklem */ 449ec7b004SRick Macklem 459ec7b004SRick Macklem #ifndef APPLE 469ec7b004SRick Macklem /* 479ec7b004SRick Macklem * First define what the actual subs. return 489ec7b004SRick Macklem */ 499ec7b004SRick Macklem #define M_HASCL(m) ((m)->m_flags & M_EXT) 509ec7b004SRick Macklem #define NFSMINOFF(m) \ 519ec7b004SRick Macklem if (M_HASCL(m)) \ 529ec7b004SRick Macklem (m)->m_data = (m)->m_ext.ext_buf; \ 539ec7b004SRick Macklem else if ((m)->m_flags & M_PKTHDR) \ 549ec7b004SRick Macklem (m)->m_data = (m)->m_pktdat; \ 559ec7b004SRick Macklem else \ 569ec7b004SRick Macklem (m)->m_data = (m)->m_dat 579ec7b004SRick Macklem #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ 589ec7b004SRick Macklem (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) 599ec7b004SRick Macklem #define NFSM_DATAP(m, s) (m)->m_data += (s) 609ec7b004SRick Macklem 619ec7b004SRick Macklem /* 629ec7b004SRick Macklem * Now for the macros that do the simple stuff and call the functions 639ec7b004SRick Macklem * for the hard stuff. 649ec7b004SRick Macklem * They use fields in struct nfsrv_descript to handle the mbuf queues. 659ec7b004SRick Macklem * Replace most of the macro with an inline function, to minimize 669ec7b004SRick Macklem * the machine code. The inline functions in lower case can be called 679ec7b004SRick Macklem * directly, bypassing the macro. 689ec7b004SRick Macklem */ 699ec7b004SRick Macklem static __inline void * 709ec7b004SRick Macklem nfsm_build(struct nfsrv_descript *nd, int siz) 719ec7b004SRick Macklem { 729ec7b004SRick Macklem void *retp; 739ec7b004SRick Macklem struct mbuf *mb2; 749ec7b004SRick Macklem 759ec7b004SRick Macklem if (siz > M_TRAILINGSPACE(nd->nd_mb)) { 769ec7b004SRick Macklem NFSMCLGET(mb2, M_DONTWAIT); 779ec7b004SRick Macklem if (siz > MLEN) 789ec7b004SRick Macklem panic("build > MLEN"); 799ec7b004SRick Macklem mbuf_setlen(mb2, 0); 809ec7b004SRick Macklem nd->nd_bpos = NFSMTOD(mb2, caddr_t); 819ec7b004SRick Macklem nd->nd_mb->m_next = mb2; 829ec7b004SRick Macklem nd->nd_mb = mb2; 839ec7b004SRick Macklem } 849ec7b004SRick Macklem retp = (void *)(nd->nd_bpos); 859ec7b004SRick Macklem nd->nd_mb->m_len += siz; 869ec7b004SRick Macklem nd->nd_bpos += siz; 879ec7b004SRick Macklem return (retp); 889ec7b004SRick Macklem } 899ec7b004SRick Macklem 909ec7b004SRick Macklem #define NFSM_BUILD(a, c, s) ((a) = (c)nfsm_build(nd, (s))) 919ec7b004SRick Macklem 929ec7b004SRick Macklem static __inline void * 939ec7b004SRick Macklem nfsm_dissect(struct nfsrv_descript *nd, int siz) 949ec7b004SRick Macklem { 959ec7b004SRick Macklem int tt1; 969ec7b004SRick Macklem void *retp; 979ec7b004SRick Macklem 989ec7b004SRick Macklem tt1 = NFSMTOD(nd->nd_md, caddr_t) + nd->nd_md->m_len - nd->nd_dpos; 999ec7b004SRick Macklem if (tt1 >= siz) { 1009ec7b004SRick Macklem retp = (void *)nd->nd_dpos; 1019ec7b004SRick Macklem nd->nd_dpos += siz; 1029ec7b004SRick Macklem } else { 1039ec7b004SRick Macklem retp = nfsm_dissct(nd, siz); 1049ec7b004SRick Macklem } 1059ec7b004SRick Macklem return (retp); 1069ec7b004SRick Macklem } 1079ec7b004SRick Macklem 1089ec7b004SRick Macklem #define NFSM_DISSECT(a, c, s) \ 1099ec7b004SRick Macklem do { \ 1109ec7b004SRick Macklem (a) = (c)nfsm_dissect(nd, (s)); \ 1119ec7b004SRick Macklem if ((a) == NULL) { \ 1129ec7b004SRick Macklem error = EBADRPC; \ 1139ec7b004SRick Macklem goto nfsmout; \ 1149ec7b004SRick Macklem } \ 1159ec7b004SRick Macklem } while (0) 1169ec7b004SRick Macklem #endif /* !APPLE */ 1179ec7b004SRick Macklem 1189ec7b004SRick Macklem #define NFSM_STRSIZ(s, m) \ 1199ec7b004SRick Macklem do { \ 1209ec7b004SRick Macklem tl = (u_int32_t *)nfsm_dissect(nd, NFSX_UNSIGNED); \ 1219ec7b004SRick Macklem if (!tl || ((s) = fxdr_unsigned(int32_t, *tl)) > (m)) { \ 1229ec7b004SRick Macklem error = EBADRPC; \ 1239ec7b004SRick Macklem goto nfsmout; \ 1249ec7b004SRick Macklem } \ 1259ec7b004SRick Macklem } while (0) 1269ec7b004SRick Macklem 1279ec7b004SRick Macklem #define NFSM_RNDUP(a) (((a)+3)&(~0x3)) 1289ec7b004SRick Macklem 1299ec7b004SRick Macklem #endif /* _NFS_NFSM_SUBS_H_ */ 130