1 /* $OpenBSD: nfsm_subs.h,v 1.49 2024/09/11 12:22:34 claudio 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 struct nfsm_info { 43 struct mbuf *nmi_mreq; 44 struct mbuf *nmi_mrep; 45 46 struct proc *nmi_procp; /* XXX XXX XXX */ 47 struct ucred *nmi_cred; /* XXX XXX XXX */ 48 49 /* Setting up / Tearing down. */ 50 struct mbuf *nmi_md; 51 struct mbuf *nmi_mb; 52 caddr_t nmi_dpos; 53 54 int nmi_v3; 55 56 int *nmi_errorp; 57 }; 58 59 static inline void * 60 nfsm_dissect(struct nfsm_info *infop, int s) 61 { 62 caddr_t ret; 63 int avail, error; 64 65 avail = mtod(infop->nmi_md, caddr_t) + infop->nmi_md->m_len - 66 infop->nmi_dpos; 67 if (avail >= s) { 68 ret = infop->nmi_dpos; 69 infop->nmi_dpos += s; 70 return ret; 71 } 72 error = nfsm_disct(&infop->nmi_md, &infop->nmi_dpos, s, avail, &ret); 73 if (error != 0) { 74 m_freem(infop->nmi_mrep); 75 infop->nmi_mrep = NULL; 76 *infop->nmi_errorp = error; 77 return NULL; 78 } else { 79 return ret; 80 } 81 } 82 83 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 84 85 static inline int 86 nfsm_adv(struct nfsm_info *infop, int s) 87 { 88 int avail, error; 89 90 avail = mtod(infop->nmi_md, caddr_t) + infop->nmi_md->m_len - 91 infop->nmi_dpos; 92 if (avail >= s) { 93 infop->nmi_dpos += s; 94 return 0; 95 } 96 error = nfs_adv(&infop->nmi_md, &infop->nmi_dpos, s, avail); 97 if (error != 0) { 98 m_freem(infop->nmi_mrep); 99 infop->nmi_mrep = NULL; 100 *infop->nmi_errorp = error; 101 return error; 102 } 103 return 0; 104 } 105 106 static inline int 107 nfsm_postop_attr(struct nfsm_info *infop, struct vnode **vpp, int *attrflagp) 108 { 109 uint32_t *tl; 110 struct vnode *ttvp; 111 int attrflag, error; 112 113 if (infop->nmi_mrep == NULL) 114 return 0; 115 116 ttvp = *vpp; 117 tl = (uint32_t *)nfsm_dissect(infop, NFSX_UNSIGNED); 118 if (tl == NULL) 119 return 1; /* anything nonzero */ 120 attrflag = fxdr_unsigned(int, *tl); 121 if (attrflag != 0) { 122 error = nfs_loadattrcache(&ttvp, &infop->nmi_md, 123 &infop->nmi_dpos, NULL); 124 if (error != 0) { 125 m_freem(infop->nmi_mrep); 126 infop->nmi_mrep = NULL; 127 *infop->nmi_errorp = error; 128 return error; 129 } 130 *vpp = ttvp; 131 } 132 *attrflagp = attrflag; 133 return 0; 134 } 135 136 static inline int 137 nfsm_strsiz(struct nfsm_info *infop, int *lenp, int maxlen) 138 { 139 uint32_t *tl = (uint32_t *)nfsm_dissect(infop, NFSX_UNSIGNED); 140 int len; 141 if (tl == NULL) 142 return 1; 143 len = fxdr_unsigned(int32_t, *tl); 144 if (len < 0 || len > maxlen) { 145 m_freem(infop->nmi_mrep); 146 infop->nmi_mrep = NULL; 147 *infop->nmi_errorp = EBADRPC; 148 return 1; 149 } 150 *lenp = len; 151 return 0; 152 } 153 154 static inline int 155 nfsm_mtouio(struct nfsm_info *infop, struct uio *uiop, int len) 156 { 157 int error; 158 159 if (len <= 0) 160 return 0; 161 162 error = nfsm_mbuftouio(&infop->nmi_md, uiop, len, &infop->nmi_dpos); 163 if (error != 0) { 164 m_freem(infop->nmi_mrep); 165 infop->nmi_mrep = NULL; 166 *infop->nmi_errorp = error; 167 return error; 168 } 169 return 0; 170 } 171 172 static inline int 173 nfsm_strtom(struct nfsm_info *infop, char *str, size_t len, size_t maxlen) 174 { 175 if (len > maxlen) { 176 m_freem(infop->nmi_mreq); 177 infop->nmi_mreq = NULL; 178 *infop->nmi_errorp = ENAMETOOLONG; 179 return 1; 180 } 181 nfsm_strtombuf(&infop->nmi_mb, str, len); 182 return 0; 183 } 184 185 #endif 186