nfsm_subs.h revision 3664
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 * @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93 37 * $Id: nfsm_subs.h,v 1.4 1994/10/02 17:27:05 phk 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 */ 52extern struct mbuf *nfsm_reqh(); 53 54#define M_HASCL(m) ((m)->m_flags & M_EXT) 55#define NFSMINOFF(m) \ 56 if (M_HASCL(m)) \ 57 (m)->m_data = (m)->m_ext.ext_buf; \ 58 else if ((m)->m_flags & M_PKTHDR) \ 59 (m)->m_data = (m)->m_pktdat; \ 60 else \ 61 (m)->m_data = (m)->m_dat 62#define NFSMADV(m, s) (m)->m_data += (s) 63#define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ 64 (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) 65 66/* 67 * Now for the macros that do the simple stuff and call the functions 68 * for the hard stuff. 69 * These macros use several vars. declared in nfsm_reqhead and these 70 * vars. must not be used elsewhere unless you are careful not to corrupt 71 * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries 72 * that may be used so long as the value is not expected to retained 73 * after a macro. 74 * I know, this is kind of dorkey, but it makes the actual op functions 75 * fairly clean and deals with the mess caused by the xdr discriminating 76 * unions. 77 */ 78 79#define nfsm_build(a,c,s) \ 80 { if ((s) > M_TRAILINGSPACE(mb)) { \ 81 MGET(mb2, M_WAIT, MT_DATA); \ 82 if ((s) > MLEN) \ 83 panic("build > MLEN"); \ 84 mb->m_next = mb2; \ 85 mb = mb2; \ 86 mb->m_len = 0; \ 87 bpos = mtod(mb, caddr_t); \ 88 } \ 89 (a) = (c)(bpos); \ 90 mb->m_len += (s); \ 91 bpos += (s); } 92 93#define nfsm_dissect(a,c,s) \ 94 { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 95 if (t1 >= (s)) { \ 96 (a) = (c)(dpos); \ 97 dpos += (s); \ 98 } else { \ 99 error = nfsm_disct(&md, &dpos, (s), t1, &cp2); \ 100 if (error) { \ 101 m_freem(mrep); \ 102 goto nfsmout; \ 103 } else { \ 104 (a) = (c)cp2; \ 105 } \ 106 } } 107 108#define nfsm_fhtom(v) \ 109 nfsm_build(cp,caddr_t,NFSX_FH); \ 110 bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH) 111 112#define nfsm_srvfhtom(f) \ 113 nfsm_build(cp,caddr_t,NFSX_FH); \ 114 bcopy((caddr_t)(f), cp, NFSX_FH) 115 116#define nfsm_mtofh(d,v) \ 117 { struct nfsnode *np; nfsv2fh_t *fhp; \ 118 nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \ 119 error = nfs_nget((d)->v_mount, fhp, &np); \ 120 if (error) { \ 121 m_freem(mrep); \ 122 goto nfsmout; \ 123 } \ 124 (v) = NFSTOV(np); \ 125 nfsm_loadattr(v, (struct vattr *)0); \ 126 } 127 128#define nfsm_loadattr(v,a) \ 129 { struct vnode *tvp = (v); \ 130 error = nfs_loadattrcache(&tvp, &md, &dpos, (a)); \ 131 if (error) { \ 132 m_freem(mrep); \ 133 goto nfsmout; \ 134 } \ 135 (v) = tvp; } 136 137#define nfsm_strsiz(s,m) \ 138 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 139 if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \ 140 m_freem(mrep); \ 141 error = EBADRPC; \ 142 goto nfsmout; \ 143 } } 144 145#define nfsm_srvstrsiz(s,m) \ 146 { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ 147 if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \ 148 error = EBADRPC; \ 149 nfsm_reply(0); \ 150 } } 151 152#define nfsm_mtouio(p,s) \ 153 if ((s) > 0 && \ 154 (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ 155 m_freem(mrep); \ 156 goto nfsmout; \ 157 } 158 159#define nfsm_uiotom(p,s) \ 160 error = nfsm_uiotombuf((p),&mb,(s),&bpos); \ 161 if (error) { \ 162 m_freem(mreq); \ 163 goto nfsmout; \ 164 } 165 166#define nfsm_reqhead(v,a,s) \ 167 mb = mreq = nfsm_reqh((v),(a),(s),&bpos) 168 169#define nfsm_reqdone m_freem(mrep); \ 170 nfsmout: 171 172#define nfsm_rndup(a) (((a)+3)&(~0x3)) 173 174#define nfsm_request(v, t, p, c) \ 175 error = nfs_request((v), mreq, (t), (p), \ 176 (c), &mrep, &md, &dpos); \ 177 if (error) \ 178 goto nfsmout 179 180#define nfsm_strtom(a,s,m) \ 181 if ((s) > (m)) { \ 182 m_freem(mreq); \ 183 error = ENAMETOOLONG; \ 184 goto nfsmout; \ 185 } \ 186 t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ 187 if (t2 <= M_TRAILINGSPACE(mb)) { \ 188 nfsm_build(tl,u_long *,t2); \ 189 *tl++ = txdr_unsigned(s); \ 190 *(tl+((t2>>2)-2)) = 0; \ 191 bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ 192 } else { \ 193 error = nfsm_strtmbuf(&mb, &bpos, (a), (s)); \ 194 if (error) { \ 195 m_freem(mreq); \ 196 goto nfsmout; \ 197 } \ 198 } 199 200#define nfsm_srvdone \ 201 nfsmout: \ 202 return(error) 203 204#define nfsm_reply(s) \ 205 { \ 206 nfsd->nd_repstat = error; \ 207 if (error) \ 208 (void) nfs_rephead(0, nfsd, error, cache, &frev, \ 209 mrq, &mb, &bpos); \ 210 else \ 211 (void) nfs_rephead((s), nfsd, error, cache, &frev, \ 212 mrq, &mb, &bpos); \ 213 m_freem(mrep); \ 214 mreq = *mrq; \ 215 if (error) \ 216 return(0); \ 217 } 218 219#define nfsm_adv(s) \ 220 t1 = mtod(md, caddr_t)+md->m_len-dpos; \ 221 if (t1 >= (s)) { \ 222 dpos += (s); \ 223 } else { \ 224 error = nfs_adv(&md, &dpos, (s), t1); \ 225 if (error) { \ 226 m_freem(mrep); \ 227 goto nfsmout; \ 228 } \ 229 } 230 231#define nfsm_srvmtofh(f) \ 232 nfsm_dissect(tl, u_long *, NFSX_FH); \ 233 bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH) 234 235#define nfsm_clget \ 236 if (bp >= be) { \ 237 if (mp == mb) \ 238 mp->m_len += bp-bpos; \ 239 MGET(mp, M_WAIT, MT_DATA); \ 240 MCLGET(mp, M_WAIT); \ 241 mp->m_len = NFSMSIZ(mp); \ 242 mp2->m_next = mp; \ 243 mp2 = mp; \ 244 bp = mtod(mp, caddr_t); \ 245 be = bp+mp->m_len; \ 246 } \ 247 tl = (u_long *)bp 248 249#define nfsm_srvfillattr \ 250 fp->fa_type = vtonfs_type(vap->va_type); \ 251 fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ 252 fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ 253 fp->fa_uid = txdr_unsigned(vap->va_uid); \ 254 fp->fa_gid = txdr_unsigned(vap->va_gid); \ 255 if (nfsd->nd_nqlflag == NQL_NOVAL) { \ 256 fp->fa_nfsblocksize = txdr_unsigned(vap->va_blocksize); \ 257 if (vap->va_type == VFIFO) \ 258 fp->fa_nfsrdev = 0xffffffff; \ 259 else \ 260 fp->fa_nfsrdev = txdr_unsigned(vap->va_rdev); \ 261 fp->fa_nfsfsid = txdr_unsigned(vap->va_fsid); \ 262 fp->fa_nfsfileid = txdr_unsigned(vap->va_fileid); \ 263 fp->fa_nfssize = txdr_unsigned(vap->va_size); \ 264 fp->fa_nfsblocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ 265 txdr_nfstime(&vap->va_atime, &fp->fa_nfsatime); \ 266 txdr_nfstime(&vap->va_mtime, &fp->fa_nfsmtime); \ 267 txdr_nfstime(&vap->va_ctime, &fp->fa_nfsctime); \ 268 } else { \ 269 fp->fa_nqblocksize = txdr_unsigned(vap->va_blocksize); \ 270 if (vap->va_type == VFIFO) \ 271 fp->fa_nqrdev = 0xffffffff; \ 272 else \ 273 fp->fa_nqrdev = txdr_unsigned(vap->va_rdev); \ 274 fp->fa_nqfsid = txdr_unsigned(vap->va_fsid); \ 275 fp->fa_nqfileid = txdr_unsigned(vap->va_fileid); \ 276 txdr_hyper(&vap->va_size, &fp->fa_nqsize); \ 277 txdr_hyper(&vap->va_bytes, &fp->fa_nqbytes); \ 278 txdr_nqtime(&vap->va_atime, &fp->fa_nqatime); \ 279 txdr_nqtime(&vap->va_mtime, &fp->fa_nqmtime); \ 280 txdr_nqtime(&vap->va_ctime, &fp->fa_nqctime); \ 281 fp->fa_nqflags = txdr_unsigned(vap->va_flags); \ 282 fp->fa_nqgen = txdr_unsigned(vap->va_gen); \ 283 txdr_hyper(&vap->va_filerev, &fp->fa_nqfilerev); \ 284 } 285 286#endif 287