| 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 1.2 1993/09/09 22:06:21 rgrimes Exp $ |
| 38 | */ |
| 39 | |
| 40 | #ifndef __h_nfsm_subs |
| 41 | #define __h_nfsm_subs 1 |
| 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 | #define nfsm_srvfillattr \ |
| 286 | fp->fa_type = vtonfs_type(vap->va_type); \ |
| 287 | fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ |
| 288 | fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ |
| 289 | fp->fa_uid = txdr_unsigned(vap->va_uid); \ |
| 290 | fp->fa_gid = txdr_unsigned(vap->va_gid); \ |
| 291 | fp->fa_size = txdr_unsigned(vap->va_size); \ |
| 292 | fp->fa_blocksize = txdr_unsigned(vap->va_blocksize); \ |
| 293 | if (vap->va_type == VFIFO) \ |
| 294 | fp->fa_rdev = 0xffffffffUL; \ |
| 295 | else \ |
| 296 | fp->fa_rdev = txdr_unsigned(vap->va_rdev); \ |
| 297 | fp->fa_blocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ |
| 298 | fp->fa_fsid = txdr_unsigned(vap->va_fsid); \ |
| 299 | fp->fa_fileid = txdr_unsigned(vap->va_fileid); \ |
| 300 | fp->fa_atime.tv_sec = txdr_unsigned(vap->va_atime.tv_sec); \ |
| 301 | fp->fa_atime.tv_usec = txdr_unsigned(vap->va_flags); \ |
| 302 | txdr_time(&vap->va_mtime, &fp->fa_mtime); \ |
| 303 | fp->fa_ctime.tv_sec = txdr_unsigned(vap->va_ctime.tv_sec); \ |
| 304 | fp->fa_ctime.tv_usec = txdr_unsigned(vap->va_gen) |
| 305 | |
| 306 | #ifdef KERNEL |
| 307 | struct nfsmount; |
| 308 | |
| 309 | void nfs_updatetimer __P((struct nfsmount *)); |
| 310 | void nfs_backofftimer __P((struct nfsmount *)); |
| 311 | int nfs_sigintr __P((struct proc *)); |
| 312 | void nfs_msg __P((struct proc *, const char *, const char *)); |
| 313 | void nfs_solock __P((int *)); |
| 314 | void nfs_sounlock __P((int *)); |
| 315 | int nfs_netaddr_match __P((struct mbuf *, struct mbuf *)); |
| 316 | int nfs_badnam __P((struct mbuf *, struct mbuf *, struct mbuf *)); |
| 317 | |
| 318 | extern int nfs_rephead(int, u_long, int, struct mbuf **, struct mbuf **, |
| 319 | caddr_t *); |
| 320 | extern struct mbuf *nfsm_reqh(u_long, u_long, u_long, struct ucred *, int, |
| 321 | caddr_t *, struct mbuf **, u_long *); |
| 322 | extern int nfsm_mbuftouio(struct mbuf **, struct uio *, int, caddr_t *); |
| 323 | extern int nfsm_uiotombuf(struct uio *, struct mbuf **, int, caddr_t *); |
| 324 | extern int nfsm_disct(struct mbuf **, caddr_t *, int, int, int, caddr_t *); |
| 325 | extern int nfs_adv(struct mbuf **, caddr_t *, int, int); |
| 326 | extern int nfsm_strtmbuf(struct mbuf **, char **, char *, long); |
| 327 | extern void nfs_init(void); |
| 328 | extern void nfsm_adj(struct mbuf *, int, int); |
| 329 | extern struct mbuf *nfs_compress(struct mbuf *); |
| 330 | extern struct mbuf *nfs_uncompress(struct mbuf *); |
| 331 | |
| 332 | extern int nfs_request(struct vnode *, struct mbuf *, u_long, int, |
| 333 | struct proc *, int, struct mount *, struct mbuf **, |
| 334 | struct mbuf **, caddr_t *); |
| 335 | struct nfsreq; |
| 336 | extern int nfs_receive(struct socket *, struct mbuf **, struct mbuf **, |
| 337 | struct nfsreq *); |
| 338 | extern int nfs_send(struct socket *, struct mbuf *, struct mbuf *, |
| 339 | struct nfsreq *); |
| 340 | extern int nfs_getreq(struct socket *so, u_long, u_long, int, struct mbuf **, |
| 341 | struct mbuf **, struct mbuf **, caddr_t *, u_long *, |
| 342 | u_long *, struct ucred *, struct mbuf *, struct mbuf *, |
| 343 | int *, int *); |
| 344 | extern int nfs_netaddr_match(struct mbuf *, struct mbuf *); |
| 345 | extern int nfs_badnam(struct mbuf *, struct mbuf *, struct mbuf *); |
| 346 | |
| 347 | #endif /* KERNEL */ |
| 348 | #endif /* __h_nfsm_subs */ |