1191783Srmacklem/*- 2191783Srmacklem * Copyright (c) 1989, 1993 3191783Srmacklem * The Regents of the University of California. All rights reserved. 4191783Srmacklem * 5191783Srmacklem * This code is derived from software contributed to Berkeley by 6191783Srmacklem * Rick Macklem at The University of Guelph. 7191783Srmacklem * 8191783Srmacklem * Redistribution and use in source and binary forms, with or without 9191783Srmacklem * modification, are permitted provided that the following conditions 10191783Srmacklem * are met: 11191783Srmacklem * 1. Redistributions of source code must retain the above copyright 12191783Srmacklem * notice, this list of conditions and the following disclaimer. 13191783Srmacklem * 2. Redistributions in binary form must reproduce the above copyright 14191783Srmacklem * notice, this list of conditions and the following disclaimer in the 15191783Srmacklem * documentation and/or other materials provided with the distribution. 16191783Srmacklem * 4. Neither the name of the University nor the names of its contributors 17191783Srmacklem * may be used to endorse or promote products derived from this software 18191783Srmacklem * without specific prior written permission. 19191783Srmacklem * 20191783Srmacklem * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21191783Srmacklem * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22191783Srmacklem * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23191783Srmacklem * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24191783Srmacklem * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25191783Srmacklem * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26191783Srmacklem * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27191783Srmacklem * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28191783Srmacklem * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29191783Srmacklem * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30191783Srmacklem * SUCH DAMAGE. 31191783Srmacklem * 32191783Srmacklem * $FreeBSD$ 33191783Srmacklem */ 34191783Srmacklem 35191783Srmacklem#ifndef _NFS_NFSM_SUBS_H_ 36191783Srmacklem#define _NFS_NFSM_SUBS_H_ 37191783Srmacklem 38191783Srmacklem 39191783Srmacklem/* 40191783Srmacklem * These macros do strange and peculiar things to mbuf chains for 41191783Srmacklem * the assistance of the nfs code. To attempt to use them for any 42191783Srmacklem * other purpose will be dangerous. (they make weird assumptions) 43191783Srmacklem */ 44191783Srmacklem 45191783Srmacklem#ifndef APPLE 46191783Srmacklem/* 47191783Srmacklem * First define what the actual subs. return 48191783Srmacklem */ 49191783Srmacklem#define NFSM_DATAP(m, s) (m)->m_data += (s) 50191783Srmacklem 51191783Srmacklem/* 52191783Srmacklem * Now for the macros that do the simple stuff and call the functions 53191783Srmacklem * for the hard stuff. 54191783Srmacklem * They use fields in struct nfsrv_descript to handle the mbuf queues. 55191783Srmacklem * Replace most of the macro with an inline function, to minimize 56191783Srmacklem * the machine code. The inline functions in lower case can be called 57191783Srmacklem * directly, bypassing the macro. 58191783Srmacklem */ 59191783Srmacklemstatic __inline void * 60191783Srmacklemnfsm_build(struct nfsrv_descript *nd, int siz) 61191783Srmacklem{ 62191783Srmacklem void *retp; 63191783Srmacklem struct mbuf *mb2; 64191783Srmacklem 65191783Srmacklem if (siz > M_TRAILINGSPACE(nd->nd_mb)) { 66243882Sglebius NFSMCLGET(mb2, M_NOWAIT); 67191783Srmacklem if (siz > MLEN) 68191783Srmacklem panic("build > MLEN"); 69191783Srmacklem mbuf_setlen(mb2, 0); 70191783Srmacklem nd->nd_bpos = NFSMTOD(mb2, caddr_t); 71191783Srmacklem nd->nd_mb->m_next = mb2; 72191783Srmacklem nd->nd_mb = mb2; 73191783Srmacklem } 74191783Srmacklem retp = (void *)(nd->nd_bpos); 75191783Srmacklem nd->nd_mb->m_len += siz; 76191783Srmacklem nd->nd_bpos += siz; 77191783Srmacklem return (retp); 78191783Srmacklem} 79191783Srmacklem 80191783Srmacklem#define NFSM_BUILD(a, c, s) ((a) = (c)nfsm_build(nd, (s))) 81191783Srmacklem 82191783Srmacklemstatic __inline void * 83191783Srmacklemnfsm_dissect(struct nfsrv_descript *nd, int siz) 84191783Srmacklem{ 85191783Srmacklem int tt1; 86191783Srmacklem void *retp; 87191783Srmacklem 88191783Srmacklem tt1 = NFSMTOD(nd->nd_md, caddr_t) + nd->nd_md->m_len - nd->nd_dpos; 89191783Srmacklem if (tt1 >= siz) { 90191783Srmacklem retp = (void *)nd->nd_dpos; 91191783Srmacklem nd->nd_dpos += siz; 92191783Srmacklem } else { 93249592Sken retp = nfsm_dissct(nd, siz, M_WAITOK); 94191783Srmacklem } 95191783Srmacklem return (retp); 96191783Srmacklem} 97191783Srmacklem 98249592Skenstatic __inline void * 99249592Skennfsm_dissect_nonblock(struct nfsrv_descript *nd, int siz) 100249592Sken{ 101249592Sken int tt1; 102249592Sken void *retp; 103249592Sken 104249592Sken tt1 = NFSMTOD(nd->nd_md, caddr_t) + nd->nd_md->m_len - nd->nd_dpos; 105249592Sken if (tt1 >= siz) { 106249592Sken retp = (void *)nd->nd_dpos; 107249592Sken nd->nd_dpos += siz; 108249592Sken } else { 109249592Sken retp = nfsm_dissct(nd, siz, M_NOWAIT); 110249592Sken } 111249592Sken return (retp); 112249592Sken} 113249592Sken 114191783Srmacklem#define NFSM_DISSECT(a, c, s) \ 115191783Srmacklem do { \ 116191783Srmacklem (a) = (c)nfsm_dissect(nd, (s)); \ 117191783Srmacklem if ((a) == NULL) { \ 118191783Srmacklem error = EBADRPC; \ 119191783Srmacklem goto nfsmout; \ 120191783Srmacklem } \ 121191783Srmacklem } while (0) 122249592Sken 123249592Sken#define NFSM_DISSECT_NONBLOCK(a, c, s) \ 124249592Sken do { \ 125249592Sken (a) = (c)nfsm_dissect_nonblock(nd, (s)); \ 126249592Sken if ((a) == NULL) { \ 127249592Sken error = EBADRPC; \ 128249592Sken goto nfsmout; \ 129249592Sken } \ 130249592Sken } while (0) 131191783Srmacklem#endif /* !APPLE */ 132191783Srmacklem 133191783Srmacklem#define NFSM_STRSIZ(s, m) \ 134191783Srmacklem do { \ 135191783Srmacklem tl = (u_int32_t *)nfsm_dissect(nd, NFSX_UNSIGNED); \ 136191783Srmacklem if (!tl || ((s) = fxdr_unsigned(int32_t, *tl)) > (m)) { \ 137191783Srmacklem error = EBADRPC; \ 138191783Srmacklem goto nfsmout; \ 139191783Srmacklem } \ 140191783Srmacklem } while (0) 141191783Srmacklem 142191783Srmacklem#define NFSM_RNDUP(a) (((a)+3)&(~0x3)) 143191783Srmacklem 144191783Srmacklem#endif /* _NFS_NFSM_SUBS_H_ */ 145