nfsm_subs.h revision 1.4
1 /* 2 * Copyright (c) 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Rick Macklem at The University of Guelph. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93 37 * $Id: nfsm_subs.h,v 1.4 1994/06/08 11:37:09 mycroft Exp $ 38 */ 39 40 /* 41 * These macros do strange and peculiar things to mbuf chains for 42 * the assistance of the nfs code. To attempt to use them for any 43 * other purpose will be dangerous. (they make weird assumptions) 44 */ 45 46 /* 47 * First define what the actual subs. return 48 */ 49 extern struct mbuf *nfsm_reqh(); 50 51 #define M_HASCL(m) ((m)->m_flags & M_EXT) 52 #define NFSMINOFF(m) \ 53 if (M_HASCL(m)) \ 54 (m)->m_data = (m)->m_ext.ext_buf; \ 55 else if ((m)->m_flags & M_PKTHDR) \ 56 (m)->m_data = (m)->m_pktdat; \ 57 else \ 58 (m)->m_data = (m)->m_dat 59 #define NFSMADV(m, s) (m)->m_data += (s) 60 #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ 61 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) 62 63 /* 64 * Now for the macros that do the simple stuff and call the functions 65 * for the hard stuff. 66 * These macros use several vars. declared in nfsm_reqhead and these 67 * vars. must not be used elsewhere unless you are careful not to corrupt 68 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 69 * that may be used so long as the value is not expected to retained 70 * after a macro. 71 * I know, this is kind of dorkey, but it makes the actual op functions 72 * fairly clean and deals with the mess caused by the xdr discriminating 73 * unions. 74 */ 75 76 #define nfsm_build(a,c,s) \ 77 { if ((s) > M_TRAILINGSPACE(mb)) { \ 78 MGET(mb2, M_WAIT, MT_DATA); \ 79 if ((s) > MLEN) \ 80 panic("build > MLEN"); \ 81 mb->m_next = mb2; \ 82 mb = mb2; \ 83 mb->m_len = 0; \ 84 bpos = mtod(mb, caddr_t); \ 85 } \ 86 (a) = (c)(bpos); \ 87 mb->m_len += (s); \ 88 bpos += (s); } 89 90 #define nfsm_dissect(a,c,s) \ 91 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 92 if (t1 >= (s)) { \ 93 (a) = (c)(dpos); \ 94 dpos += (s); \ 95 } else if (error = nfsm_disct(&md, &dpos, (s), t1, &cp2)) { \ 96 m_freem(mrep); \ 97 goto nfsmout; \ 98 } else { \ 99 (a) = (c)cp2; \ 100 } } 101 102 #define nfsm_fhtom(v) \ 103 nfsm_build(cp,caddr_t,NFSX_FH); \ 104 bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH) 105 106 #define nfsm_srvfhtom(f) \ 107 nfsm_build(cp,caddr_t,NFSX_FH); \ 108 bcopy((caddr_t)(f), cp, NFSX_FH) 109 110 #define nfsm_mtofh(d,v) \ 111 { struct nfsnode *np; nfsv2fh_t *fhp; \ 112 nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \ 113 if (error = nfs_nget((d)->v_mount, fhp, &np)) { \ 114 m_freem(mrep); \ 115 goto nfsmout; \ 116 } \ 117 (v) = NFSTOV(np); \ 118 nfsm_loadattr(v, (struct vattr *)0); \ 119 } 120 121 #define nfsm_loadattr(v,a) \ 122 { struct vnode *tvp = (v); \ 123 if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \ 124 m_freem(mrep); \ 125 goto nfsmout; \ 126 } \ 127 (v) = tvp; } 128 129 #define nfsm_strsiz(s,m) \ 130 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 131 if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \ 132 m_freem(mrep); \ 133 error = EBADRPC; \ 134 goto nfsmout; \ 135 } } 136 137 #define nfsm_srvstrsiz(s,m) \ 138 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 139 if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \ 140 error = EBADRPC; \ 141 nfsm_reply(0); \ 142 } } 143 144 #define nfsm_mtouio(p,s) \ 145 if ((s) > 0 && \ 146 (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ 147 m_freem(mrep); \ 148 goto nfsmout; \ 149 } 150 151 #define nfsm_uiotom(p,s) \ 152 if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \ 153 m_freem(mreq); \ 154 goto nfsmout; \ 155 } 156 157 #define nfsm_reqhead(v,a,s) \ 158 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 159 160 #define nfsm_reqdone m_freem(mrep); \ 161 nfsmout: 162 163 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 164 165 #define nfsm_request(v, t, p, c) \ 166 if (error = nfs_request((v), mreq, (t), (p), \ 167 (c), &mrep, &md, &dpos)) \ 168 goto nfsmout 169 170 #define nfsm_strtom(a,s,m) \ 171 if ((s) > (m)) { \ 172 m_freem(mreq); \ 173 error = ENAMETOOLONG; \ 174 goto nfsmout; \ 175 } \ 176 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 177 if (t2 <= M_TRAILINGSPACE(mb)) { \ 178 nfsm_build(tl,u_long *,t2); \ 179 *tl++ = txdr_unsigned(s); \ 180 *(tl+((t2>>2)-2)) = 0; \ 181 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 182 } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \ 183 m_freem(mreq); \ 184 goto nfsmout; \ 185 } 186 187 #define nfsm_srvdone \ 188 nfsmout: \ 189 return(error) 190 191 #define nfsm_reply(s) \ 192 { \ 193 nfsd->nd_repstat = error; \ 194 if (error) \ 195 (void) nfs_rephead(0, nfsd, error, cache, &frev, \ 196 mrq, &mb, &bpos); \ 197 else \ 198 (void) nfs_rephead((s), nfsd, error, cache, &frev, \ 199 mrq, &mb, &bpos); \ 200 m_freem(mrep); \ 201 mreq = *mrq; \ 202 if (error) \ 203 return(0); \ 204 } 205 206 #define nfsm_adv(s) \ 207 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 208 if (t1 >= (s)) { \ 209 dpos += (s); \ 210 } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \ 211 m_freem(mrep); \ 212 goto nfsmout; \ 213 } 214 215 #define nfsm_srvmtofh(f) \ 216 nfsm_dissect(tl, u_long *, NFSX_FH); \ 217 bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH) 218 219 #define nfsm_clget \ 220 if (bp >= be) { \ 221 if (mp == mb) \ 222 mp->m_len += bp-bpos; \ 223 MGET(mp, M_WAIT, MT_DATA); \ 224 MCLGET(mp, M_WAIT); \ 225 mp->m_len = NFSMSIZ(mp); \ 226 mp2->m_next = mp; \ 227 mp2 = mp; \ 228 bp = mtod(mp, caddr_t); \ 229 be = bp+mp->m_len; \ 230 } \ 231 tl = (u_long *)bp 232 233 #define nfsm_srvfillattr \ 234 fp->fa_type = vtonfs_type(vap->va_type); \ 235 fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ 236 fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ 237 fp->fa_uid = txdr_unsigned(vap->va_uid); \ 238 fp->fa_gid = txdr_unsigned(vap->va_gid); \ 239 if (nfsd->nd_nqlflag == NQL_NOVAL) { \ 240 fp->fa_nfsblocksize = txdr_unsigned(vap->va_blocksize); \ 241 if (vap->va_type == VFIFO) \ 242 fp->fa_nfsrdev = 0xffffffff; \ 243 else \ 244 fp->fa_nfsrdev = txdr_unsigned(vap->va_rdev); \ 245 fp->fa_nfsfsid = txdr_unsigned(vap->va_fsid); \ 246 fp->fa_nfsfileid = txdr_unsigned(vap->va_fileid); \ 247 fp->fa_nfssize = txdr_unsigned(vap->va_size); \ 248 fp->fa_nfsblocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ 249 txdr_nfstime(&vap->va_atime, &fp->fa_nfsatime); \ 250 txdr_nfstime(&vap->va_mtime, &fp->fa_nfsmtime); \ 251 txdr_nfstime(&vap->va_ctime, &fp->fa_nfsctime); \ 252 } else { \ 253 fp->fa_nqblocksize = txdr_unsigned(vap->va_blocksize); \ 254 if (vap->va_type == VFIFO) \ 255 fp->fa_nqrdev = 0xffffffff; \ 256 else \ 257 fp->fa_nqrdev = txdr_unsigned(vap->va_rdev); \ 258 fp->fa_nqfsid = txdr_unsigned(vap->va_fsid); \ 259 fp->fa_nqfileid = txdr_unsigned(vap->va_fileid); \ 260 txdr_hyper(&vap->va_size, &fp->fa_nqsize); \ 261 txdr_hyper(&vap->va_bytes, &fp->fa_nqbytes); \ 262 txdr_nqtime(&vap->va_atime, &fp->fa_nqatime); \ 263 txdr_nqtime(&vap->va_mtime, &fp->fa_nqmtime); \ 264 txdr_nqtime(&vap->va_ctime, &fp->fa_nqctime); \ 265 fp->fa_nqflags = txdr_unsigned(vap->va_flags); \ 266 fp->fa_nqgen = txdr_unsigned(vap->va_gen); \ 267 txdr_hyper(&vap->va_filerev, &fp->fa_nqfilerev); \ 268 } 269 270
Indexes created Mon Sep 29 21:09:56 GMT 2025