1 /* $NetBSD: nfsm_subs.h,v 1.5 1994/06/29 06:42:33 cgd Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Rick Macklem at The University of Guelph. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93 39 */ 40 41 /* 42 * These macros do strange and peculiar things to mbuf chains for 43 * the assistance of the nfs code. To attempt to use them for any 44 * other purpose will be dangerous. (they make weird assumptions) 45 */ 46 47 /* 48 * First define what the actual subs. return 49 */ 50 extern struct mbuf *nfsm_reqh(); 51 52 #define M_HASCL(m) ((m)->m_flags & M_EXT) 53 #define NFSMINOFF(m) \ 54 if (M_HASCL(m)) \ 55 (m)->m_data = (m)->m_ext.ext_buf; \ 56 else if ((m)->m_flags & M_PKTHDR) \ 57 (m)->m_data = (m)->m_pktdat; \ 58 else \ 59 (m)->m_data = (m)->m_dat 60 #define NFSMADV(m, s) (m)->m_data += (s) 61 #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ 62 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) 63 64 /* 65 * Now for the macros that do the simple stuff and call the functions 66 * for the hard stuff. 67 * These macros use several vars. declared in nfsm_reqhead and these 68 * vars. must not be used elsewhere unless you are careful not to corrupt 69 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 70 * that may be used so long as the value is not expected to retained 71 * after a macro. 72 * I know, this is kind of dorkey, but it makes the actual op functions 73 * fairly clean and deals with the mess caused by the xdr discriminating 74 * unions. 75 */ 76 77 #define nfsm_build(a,c,s) \ 78 { if ((s) > M_TRAILINGSPACE(mb)) { \ 79 MGET(mb2, M_WAIT, MT_DATA); \ 80 if ((s) > MLEN) \ 81 panic("build > MLEN"); \ 82 mb->m_next = mb2; \ 83 mb = mb2; \ 84 mb->m_len = 0; \ 85 bpos = mtod(mb, caddr_t); \ 86 } \ 87 (a) = (c)(bpos); \ 88 mb->m_len += (s); \ 89 bpos += (s); } 90 91 #define nfsm_dissect(a,c,s) \ 92 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 93 if (t1 >= (s)) { \ 94 (a) = (c)(dpos); \ 95 dpos += (s); \ 96 } else if (error = nfsm_disct(&md, &dpos, (s), t1, &cp2)) { \ 97 m_freem(mrep); \ 98 goto nfsmout; \ 99 } else { \ 100 (a) = (c)cp2; \ 101 } } 102 103 #define nfsm_fhtom(v) \ 104 nfsm_build(cp,caddr_t,NFSX_FH); \ 105 bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH) 106 107 #define nfsm_srvfhtom(f) \ 108 nfsm_build(cp,caddr_t,NFSX_FH); \ 109 bcopy((caddr_t)(f), cp, NFSX_FH) 110 111 #define nfsm_mtofh(d,v) \ 112 { struct nfsnode *np; nfsv2fh_t *fhp; \ 113 nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \ 114 if (error = nfs_nget((d)->v_mount, fhp, &np)) { \ 115 m_freem(mrep); \ 116 goto nfsmout; \ 117 } \ 118 (v) = NFSTOV(np); \ 119 nfsm_loadattr(v, (struct vattr *)0); \ 120 } 121 122 #define nfsm_loadattr(v,a) \ 123 { struct vnode *tvp = (v); \ 124 if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \ 125 m_freem(mrep); \ 126 goto nfsmout; \ 127 } \ 128 (v) = tvp; } 129 130 #define nfsm_strsiz(s,m) \ 131 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 132 if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \ 133 m_freem(mrep); \ 134 error = EBADRPC; \ 135 goto nfsmout; \ 136 } } 137 138 #define nfsm_srvstrsiz(s,m) \ 139 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 140 if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \ 141 error = EBADRPC; \ 142 nfsm_reply(0); \ 143 } } 144 145 #define nfsm_mtouio(p,s) \ 146 if ((s) > 0 && \ 147 (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ 148 m_freem(mrep); \ 149 goto nfsmout; \ 150 } 151 152 #define nfsm_uiotom(p,s) \ 153 if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \ 154 m_freem(mreq); \ 155 goto nfsmout; \ 156 } 157 158 #define nfsm_reqhead(v,a,s) \ 159 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 160 161 #define nfsm_reqdone m_freem(mrep); \ 162 nfsmout: 163 164 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 165 166 #define nfsm_request(v, t, p, c) \ 167 if (error = nfs_request((v), mreq, (t), (p), \ 168 (c), &mrep, &md, &dpos)) \ 169 goto nfsmout 170 171 #define nfsm_strtom(a,s,m) \ 172 if ((s) > (m)) { \ 173 m_freem(mreq); \ 174 error = ENAMETOOLONG; \ 175 goto nfsmout; \ 176 } \ 177 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 178 if (t2 <= M_TRAILINGSPACE(mb)) { \ 179 nfsm_build(tl,u_long *,t2); \ 180 *tl++ = txdr_unsigned(s); \ 181 *(tl+((t2>>2)-2)) = 0; \ 182 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 183 } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \ 184 m_freem(mreq); \ 185 goto nfsmout; \ 186 } 187 188 #define nfsm_srvdone \ 189 nfsmout: \ 190 return(error) 191 192 #define nfsm_reply(s) \ 193 { \ 194 nfsd->nd_repstat = error; \ 195 if (error) \ 196 (void) nfs_rephead(0, nfsd, error, cache, &frev, \ 197 mrq, &mb, &bpos); \ 198 else \ 199 (void) nfs_rephead((s), nfsd, error, cache, &frev, \ 200 mrq, &mb, &bpos); \ 201 m_freem(mrep); \ 202 mreq = *mrq; \ 203 if (error) \ 204 return(0); \ 205 } 206 207 #define nfsm_adv(s) \ 208 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 209 if (t1 >= (s)) { \ 210 dpos += (s); \ 211 } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \ 212 m_freem(mrep); \ 213 goto nfsmout; \ 214 } 215 216 #define nfsm_srvmtofh(f) \ 217 nfsm_dissect(tl, u_long *, NFSX_FH); \ 218 bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH) 219 220 #define nfsm_clget \ 221 if (bp >= be) { \ 222 if (mp == mb) \ 223 mp->m_len += bp-bpos; \ 224 MGET(mp, M_WAIT, MT_DATA); \ 225 MCLGET(mp, M_WAIT); \ 226 mp->m_len = NFSMSIZ(mp); \ 227 mp2->m_next = mp; \ 228 mp2 = mp; \ 229 bp = mtod(mp, caddr_t); \ 230 be = bp+mp->m_len; \ 231 } \ 232 tl = (u_long *)bp 233 234 #define nfsm_srvfillattr \ 235 fp->fa_type = vtonfs_type(vap->va_type); \ 236 fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ 237 fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ 238 fp->fa_uid = txdr_unsigned(vap->va_uid); \ 239 fp->fa_gid = txdr_unsigned(vap->va_gid); \ 240 if (nfsd->nd_nqlflag == NQL_NOVAL) { \ 241 fp->fa_nfsblocksize = txdr_unsigned(vap->va_blocksize); \ 242 if (vap->va_type == VFIFO) \ 243 fp->fa_nfsrdev = 0xffffffff; \ 244 else \ 245 fp->fa_nfsrdev = txdr_unsigned(vap->va_rdev); \ 246 fp->fa_nfsfsid = txdr_unsigned(vap->va_fsid); \ 247 fp->fa_nfsfileid = txdr_unsigned(vap->va_fileid); \ 248 fp->fa_nfssize = txdr_unsigned(vap->va_size); \ 249 fp->fa_nfsblocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ 250 txdr_nfstime(&vap->va_atime, &fp->fa_nfsatime); \ 251 txdr_nfstime(&vap->va_mtime, &fp->fa_nfsmtime); \ 252 txdr_nfstime(&vap->va_ctime, &fp->fa_nfsctime); \ 253 } else { \ 254 fp->fa_nqblocksize = txdr_unsigned(vap->va_blocksize); \ 255 if (vap->va_type == VFIFO) \ 256 fp->fa_nqrdev = 0xffffffff; \ 257 else \ 258 fp->fa_nqrdev = txdr_unsigned(vap->va_rdev); \ 259 fp->fa_nqfsid = txdr_unsigned(vap->va_fsid); \ 260 fp->fa_nqfileid = txdr_unsigned(vap->va_fileid); \ 261 txdr_hyper(&vap->va_size, &fp->fa_nqsize); \ 262 txdr_hyper(&vap->va_bytes, &fp->fa_nqbytes); \ 263 txdr_nqtime(&vap->va_atime, &fp->fa_nqatime); \ 264 txdr_nqtime(&vap->va_mtime, &fp->fa_nqmtime); \ 265 txdr_nqtime(&vap->va_ctime, &fp->fa_nqctime); \ 266 fp->fa_nqflags = txdr_unsigned(vap->va_flags); \ 267 fp->fa_nqgen = txdr_unsigned(vap->va_gen); \ 268 txdr_hyper(&vap->va_filerev, &fp->fa_nqfilerev); \ 269 } 270 271