1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 7.11 (Berkeley) 4/16/91 37 * $Id: nfsm_subs.h,v 1.3 1993/06/03 01:12:46 cgd Exp $ 38 */ 39 40 #ifndef _NFS_NFSM_SUBS_H_ 41 #define _NFS_NFSM_SUBS_H_ 42 43 /* 44 * These macros do strange and peculiar things to mbuf chains for 45 * the assistance of the nfs code. To attempt to use them for any 46 * other purpose will be dangerous. (they make weird assumptions) 47 */ 48 49 /* 50 * First define what the actual subs. return 51 */ 52 extern struct mbuf *nfsm_reqh(); 53 54 #define M_HASCL(m) ((m)->m_flags & M_EXT) 55 #define NFSMGETHDR(m) \ 56 MGETHDR(m, M_WAIT, MT_DATA); \ 57 (m)->m_pkthdr.len = 0; \ 58 (m)->m_pkthdr.rcvif = (struct ifnet *)0 59 #define NFSMINOFF(m) \ 60 if (M_HASCL(m)) \ 61 (m)->m_data = (m)->m_ext.ext_buf; \ 62 else \ 63 (m)->m_data = (m)->m_dat 64 #define NFSMADV(m, s) (m)->m_data += (s) 65 #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ 66 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) 67 68 /* 69 * Now for the macros that do the simple stuff and call the functions 70 * for the hard stuff. 71 * These macros use several vars. declared in nfsm_reqhead and these 72 * vars. must not be used elsewhere unless you are careful not to corrupt 73 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 74 * that may be used so long as the value is not expected to retained 75 * after a macro. 76 * I know, this is kind of dorkey, but it makes the actual op functions 77 * fairly clean and deals with the mess caused by the xdr discriminating 78 * unions. 79 */ 80 81 #ifndef lint 82 #define nfsm_build(a,c,s) \ 83 t1 = NFSMSIZ(mb); \ 84 if ((s) > (t1-mb->m_len)) { \ 85 MGET(mb2, M_WAIT, MT_DATA); \ 86 if ((s) > MLEN) \ 87 panic("build > MLEN"); \ 88 mb->m_next = mb2; \ 89 mb = mb2; \ 90 mb->m_len = 0; \ 91 bpos = mtod(mb, caddr_t); \ 92 } \ 93 (a) = (c)(bpos); \ 94 mb->m_len += (s); \ 95 bpos += (s) 96 #else /* lint */ 97 #define nfsm_build(a,c,s) \ 98 t1 = NFSMSIZ(mb); \ 99 if ((s) > (t1-mb->m_len)) { \ 100 MGET(mb2, M_WAIT, MT_DATA); \ 101 mb->m_next = mb2; \ 102 mb = mb2; \ 103 mb->m_len = 0; \ 104 bpos = mtod(mb, caddr_t); \ 105 } \ 106 (a) = (c)(bpos); \ 107 mb->m_len += (s); \ 108 bpos += (s) 109 #endif /* lint */ 110 111 #define nfsm_disect(a,c,s) \ 112 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 113 if (t1 >= (s)) { \ 114 (a) = (c)(dpos); \ 115 dpos += (s); \ 116 } else if (error = nfsm_disct(&md, &dpos, (s), t1, TRUE, &cp2)) { \ 117 m_freem(mrep); \ 118 goto nfsmout; \ 119 } else { \ 120 (a) = (c)cp2; \ 121 } 122 123 #define nfsm_disecton(a,c,s) \ 124 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 125 if (t1 >= (s)) { \ 126 (a) = (c)(dpos); \ 127 dpos += (s); \ 128 } else if (error = nfsm_disct(&md, &dpos, (s), t1, FALSE, &cp2)) { \ 129 m_freem(mrep); \ 130 goto nfsmout; \ 131 } else { \ 132 (a) = (c)cp2; \ 133 } 134 135 #define nfsm_fhtom(v) \ 136 nfsm_build(cp,caddr_t,NFSX_FH); \ 137 bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH) 138 139 #define nfsm_srvfhtom(f) \ 140 nfsm_build(cp,caddr_t,NFSX_FH); \ 141 bcopy((caddr_t)(f), cp, NFSX_FH) 142 143 #define nfsm_mtofh(d,v) \ 144 { struct nfsnode *np; nfsv2fh_t *fhp; \ 145 nfsm_disect(fhp,nfsv2fh_t *,NFSX_FH); \ 146 if (error = nfs_nget((d)->v_mount, fhp, &np)) { \ 147 m_freem(mrep); \ 148 goto nfsmout; \ 149 } \ 150 (v) = NFSTOV(np); \ 151 nfsm_loadattr(v, (struct vattr *)0); \ 152 } 153 154 #define nfsm_loadattr(v,a) \ 155 { struct vnode *tvp = (v); \ 156 if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \ 157 m_freem(mrep); \ 158 goto nfsmout; \ 159 } \ 160 (v) = tvp; } 161 162 #define nfsm_strsiz(s,m) \ 163 nfsm_disect(tl,u_long *,NFSX_UNSIGNED); \ 164 if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \ 165 m_freem(mrep); \ 166 error = EBADRPC; \ 167 goto nfsmout; \ 168 } 169 170 #define nfsm_srvstrsiz(s,m) \ 171 nfsm_disect(tl,u_long *,NFSX_UNSIGNED); \ 172 if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \ 173 error = EBADRPC; \ 174 nfsm_reply(0); \ 175 } 176 177 #define nfsm_mtouio(p,s) \ 178 if ((s) > 0 && \ 179 (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ 180 m_freem(mrep); \ 181 goto nfsmout; \ 182 } 183 184 #define nfsm_uiotom(p,s) \ 185 if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \ 186 m_freem(mreq); \ 187 goto nfsmout; \ 188 } 189 190 #define nfsm_reqhead(a,c,s) \ 191 if ((mreq = nfsm_reqh(nfs_prog,nfs_vers,(a),(c),(s),&bpos,&mb,&xid)) == NULL) { \ 192 error = ENOBUFS; \ 193 goto nfsmout; \ 194 } 195 196 #define nfsm_reqdone m_freem(mrep); \ 197 nfsmout: 198 199 #define nfsm_rndup(a) (((a)+3)&(~0x3)) 200 201 #define nfsm_request(v, t, p, h) \ 202 if (error = nfs_request((v), mreq, xid, (t), (p), (h), \ 203 (v)->v_mount, &mrep, &md, &dpos)) \ 204 goto nfsmout 205 206 #define nfsm_strtom(a,s,m) \ 207 if ((s) > (m)) { \ 208 m_freem(mreq); \ 209 error = ENAMETOOLONG; \ 210 goto nfsmout; \ 211 } \ 212 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 213 if(t2<=(NFSMSIZ(mb)-mb->m_len)){ \ 214 nfsm_build(tl,u_long *,t2); \ 215 *tl++ = txdr_unsigned(s); \ 216 *(tl+((t2>>2)-2)) = 0; \ 217 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 218 } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \ 219 m_freem(mreq); \ 220 goto nfsmout; \ 221 } 222 223 #define nfsm_srvdone \ 224 nfsmout: \ 225 return(error) 226 227 #ifndef lint 228 #define nfsm_reply(s) \ 229 { \ 230 *repstat = error; \ 231 if (error) \ 232 nfs_rephead(0, xid, error, mrq, &mb, &bpos); \ 233 else \ 234 nfs_rephead((s), xid, error, mrq, &mb, &bpos); \ 235 m_freem(mrep); \ 236 mreq = *mrq; \ 237 if (error) \ 238 return(0); \ 239 } 240 #else /* lint */ 241 #define nfsm_reply(s) \ 242 { \ 243 *repstat = error; \ 244 if (error) \ 245 nfs_rephead(0, xid, error, mrq, &mb, &bpos); \ 246 else \ 247 nfs_rephead((s), xid, error, mrq, &mb, &bpos); \ 248 m_freem(mrep); \ 249 mreq = *mrq; \ 250 mrep = mreq; \ 251 if (error) \ 252 return(0); \ 253 } 254 #endif /* lint */ 255 256 #define nfsm_adv(s) \ 257 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 258 if (t1 >= (s)) { \ 259 dpos += (s); \ 260 } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \ 261 m_freem(mrep); \ 262 goto nfsmout; \ 263 } 264 265 #define nfsm_srvmtofh(f) \ 266 nfsm_disecton(tl, u_long *, NFSX_FH); \ 267 bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH) 268 269 #define nfsm_clget \ 270 if (bp >= be) { \ 271 MGET(mp, M_WAIT, MT_DATA); \ 272 MCLGET(mp, M_WAIT); \ 273 mp->m_len = NFSMSIZ(mp); \ 274 if (mp3 == NULL) \ 275 mp3 = mp2 = mp; \ 276 else { \ 277 mp2->m_next = mp; \ 278 mp2 = mp; \ 279 } \ 280 bp = mtod(mp, caddr_t); \ 281 be = bp+mp->m_len; \ 282 } \ 283 tl = (u_long *)bp 284 285 #if 0 /* va_atime.tv_usec is not unused (jfw@ksr.com 6/2/93) */ 286 #define nfsm_srvfillattr \ 287 fp->fa_type = vtonfs_type(vap->va_type); \ 288 fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ 289 fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ 290 fp->fa_uid = txdr_unsigned(vap->va_uid); \ 291 fp->fa_gid = txdr_unsigned(vap->va_gid); \ 292 fp->fa_size = txdr_unsigned(vap->va_size); \ 293 fp->fa_blocksize = txdr_unsigned(vap->va_blocksize); \ 294 if (vap->va_type == VFIFO) \ 295 fp->fa_rdev = 0xffffffff; \ 296 else \ 297 fp->fa_rdev = txdr_unsigned(vap->va_rdev); \ 298 fp->fa_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ 299 fp->fa_fsid = txdr_unsigned(vap->va_fsid); \ 300 fp->fa_fileid = txdr_unsigned(vap->va_fileid); \ 301 fp->fa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); \ 302 fp->fa_atime.tv_usec = txdr_unsigned(vap->va_flags); \ 303 txdr_time(&vap->va_mtime, &fp->fa_mtime); \ 304 fp->fa_ctime.tv_sec = txdr_unsigned(vap->va_ctime.tv_sec); \ 305 fp->fa_ctime.tv_usec = txdr_unsigned(vap->va_gen) 306 #else /* don't try to extend the poor NFS protocol */ 307 #define nfsm_srvfillattr \ 308 fp->fa_type = vtonfs_type(vap->va_type); \ 309 fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ 310 fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ 311 fp->fa_uid = txdr_unsigned(vap->va_uid); \ 312 fp->fa_gid = txdr_unsigned(vap->va_gid); \ 313 fp->fa_size = txdr_unsigned(vap->va_size); \ 314 fp->fa_blocksize = txdr_unsigned(vap->va_blocksize); \ 315 if (vap->va_type == VFIFO) \ 316 fp->fa_rdev = 0xffffffff; \ 317 else \ 318 fp->fa_rdev = txdr_unsigned(vap->va_rdev); \ 319 fp->fa_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ 320 fp->fa_fsid = txdr_unsigned(vap->va_fsid); \ 321 fp->fa_fileid = txdr_unsigned(vap->va_fileid); \ 322 txdr_time(&vap->va_atime, &fp->fa_atime); \ 323 txdr_time(&vap->va_mtime, &fp->fa_mtime); \ 324 txdr_time(&vap->va_ctime, &fp->fa_ctime); 325 #endif 326 327 #endif /* !_NFS_NFSM_SUBS_H_ */ 328