diff options
Diffstat (limited to 'sys/nfs/nfsm_subs.h')
| -rw-r--r-- | sys/nfs/nfsm_subs.h | 564 |
1 files changed, 564 insertions, 0 deletions
diff --git a/sys/nfs/nfsm_subs.h b/sys/nfs/nfsm_subs.h new file mode 100644 index 0000000..b13c009 --- /dev/null +++ b/sys/nfs/nfsm_subs.h @@ -0,0 +1,564 @@ +/* + * Copyright (c) 1989, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Rick Macklem at The University of Guelph. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)nfsm_subs.h 8.2 (Berkeley) 3/30/95 + * $FreeBSD$ + */ + + +#ifndef _NFS_NFSM_SUBS_H_ +#define _NFS_NFSM_SUBS_H_ + +struct ucred; +struct vnode; + +/* + * These macros do strange and peculiar things to mbuf chains for + * the assistance of the nfs code. To attempt to use them for any + * other purpose will be dangerous. (they make weird assumptions) + */ + +/* + * First define what the actual subs. return + */ +struct mbuf *nfsm_reqh __P((struct vnode *vp, u_long procid, int hsiz, + caddr_t *bposp)); +struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid, + int auth_type, int auth_len, char *auth_str, + int verf_len, char *verf_str, + struct mbuf *mrest, int mrest_len, + struct mbuf **mbp, u_int32_t *xidp)); + +#define M_HASCL(m) ((m)->m_flags & M_EXT) +#define NFSMINOFF(m) \ + do { \ + if (M_HASCL(m)) \ + (m)->m_data = (m)->m_ext.ext_buf; \ + else if ((m)->m_flags & M_PKTHDR) \ + (m)->m_data = (m)->m_pktdat; \ + else \ + (m)->m_data = (m)->m_dat; \ + } while (0) +#define NFSMADV(m, s) \ + do { \ + (m)->m_data += (s); \ + } while (0) +#define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \ + (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN)) + +/* + * Now for the macros that do the simple stuff and call the functions + * for the hard stuff. + * These macros use several vars. declared in nfsm_reqhead and these + * vars. must not be used elsewhere unless you are careful not to corrupt + * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries + * that may be used so long as the value is not expected to retained + * after a macro. + * I know, this is kind of dorkey, but it makes the actual op functions + * fairly clean and deals with the mess caused by the xdr discriminating + * unions. + */ + +#define nfsm_build(a,c,s) \ + do { \ + if ((s) > M_TRAILINGSPACE(mb)) { \ + MGET(mb2, M_WAIT, MT_DATA); \ + if ((s) > MLEN) \ + panic("build > MLEN"); \ + mb->m_next = mb2; \ + mb = mb2; \ + mb->m_len = 0; \ + bpos = mtod(mb, caddr_t); \ + } \ + (a) = (c)(bpos); \ + mb->m_len += (s); \ + bpos += (s); \ + } while (0) + +#define nfsm_dissect(a, c, s) \ + do { \ + t1 = mtod(md, caddr_t)+md->m_len-dpos; \ + if (t1 >= (s)) { \ + (a) = (c)(dpos); \ + dpos += (s); \ + } else if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \ + error = t1; \ + m_freem(mrep); \ + goto nfsmout; \ + } else { \ + (a) = (c)cp2; \ + } \ + } while (0) + +#define nfsm_fhtom(v, v3) \ + do { \ + if (v3) { \ + t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \ + if (t2 <= M_TRAILINGSPACE(mb)) { \ + nfsm_build(tl, u_int32_t *, t2); \ + *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \ + *(tl + ((t2>>2) - 2)) = 0; \ + bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \ + VTONFS(v)->n_fhsize); \ + } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \ + (caddr_t)VTONFS(v)->n_fhp, \ + VTONFS(v)->n_fhsize)) != 0) { \ + error = t2; \ + m_freem(mreq); \ + goto nfsmout; \ + } \ + } else { \ + nfsm_build(cp, caddr_t, NFSX_V2FH); \ + bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \ + } \ + } while (0) + +#define nfsm_srvfhtom(f, v3) \ + do { \ + if (v3) { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH);\ + *tl++ = txdr_unsigned(NFSX_V3FH); \ + bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ + } else { \ + nfsm_build(cp, caddr_t, NFSX_V2FH); \ + bcopy((caddr_t)(f), cp, NFSX_V2FH); \ + } \ + } while (0) + +#define nfsm_srvpostop_fh(f) \ + do { \ + nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \ + *tl++ = nfs_true; \ + *tl++ = txdr_unsigned(NFSX_V3FH); \ + bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \ + } while (0) + +#define nfsm_mtofh(d, v, v3, f) \ + do { \ + struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \ + if (v3) { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + (f) = fxdr_unsigned(int, *tl); \ + } else \ + (f) = 1; \ + if (f) { \ + nfsm_getfh(ttfhp, ttfhsize, (v3)); \ + if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \ + &ttnp)) != 0) { \ + error = t1; \ + m_freem(mrep); \ + goto nfsmout; \ + } \ + (v) = NFSTOV(ttnp); \ + } \ + if (v3) { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (f) \ + (f) = fxdr_unsigned(int, *tl); \ + else if (fxdr_unsigned(int, *tl)) \ + nfsm_adv(NFSX_V3FATTR); \ + } \ + if (f) \ + nfsm_loadattr((v), (struct vattr *)0); \ + } while (0) + +#define nfsm_getfh(f, s, v3) \ + do { \ + if (v3) { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \ + (s) > NFSX_V3FHMAX) { \ + m_freem(mrep); \ + error = EBADRPC; \ + goto nfsmout; \ + } \ + } else \ + (s) = NFSX_V2FH; \ + nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); \ + } while (0) + +#define nfsm_loadattr(v, a) \ + do { \ + struct vnode *ttvp = (v); \ + if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \ + error = t1; \ + m_freem(mrep); \ + goto nfsmout; \ + } \ + (v) = ttvp; \ + } while (0) + +#define nfsm_postop_attr(v, f) \ + do { \ + struct vnode *ttvp = (v); \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (((f) = fxdr_unsigned(int, *tl)) != 0) { \ + if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \ + (struct vattr *)0)) != 0) { \ + error = t1; \ + (f) = 0; \ + m_freem(mrep); \ + goto nfsmout; \ + } \ + (v) = ttvp; \ + } \ + } while (0) + +/* Used as (f) for nfsm_wcc_data() */ +#define NFSV3_WCCRATTR 0 +#define NFSV3_WCCCHK 1 + +#define nfsm_wcc_data(v, f) \ + do { \ + int ttattrf, ttretf = 0; \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (*tl == nfs_true) { \ + nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \ + if (f) \ + ttretf = (VTONFS(v)->n_mtime == \ + fxdr_unsigned(u_int32_t, *(tl + 2))); \ + } \ + nfsm_postop_attr((v), ttattrf); \ + if (f) { \ + (f) = ttretf; \ + } else { \ + (f) = ttattrf; \ + } \ + } while (0) + +/* If full is true, set all fields, otherwise just set mode and time fields */ +#define nfsm_v3attrbuild(a, full) \ + do { \ + if ((a)->va_mode != (mode_t)VNOVAL) { \ + nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ + *tl++ = nfs_true; \ + *tl = txdr_unsigned((a)->va_mode); \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = nfs_false; \ + } \ + if ((full) && (a)->va_uid != (uid_t)VNOVAL) { \ + nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ + *tl++ = nfs_true; \ + *tl = txdr_unsigned((a)->va_uid); \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = nfs_false; \ + } \ + if ((full) && (a)->va_gid != (gid_t)VNOVAL) { \ + nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ + *tl++ = nfs_true; \ + *tl = txdr_unsigned((a)->va_gid); \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = nfs_false; \ + } \ + if ((full) && (a)->va_size != VNOVAL) { \ + nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \ + *tl++ = nfs_true; \ + txdr_hyper((a)->va_size, tl); \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = nfs_false; \ + } \ + if ((a)->va_atime.tv_sec != VNOVAL) { \ + if ((a)->va_atime.tv_sec != time_second) { \ + nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);\ + *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);\ + txdr_nfsv3time(&(a)->va_atime, tl); \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ + } \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ + } \ + if ((a)->va_mtime.tv_sec != VNOVAL) { \ + if ((a)->va_mtime.tv_sec != time_second) { \ + nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);\ + *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);\ + txdr_nfsv3time(&(a)->va_mtime, tl); \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \ + } \ + } else { \ + nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \ + *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \ + } \ + } while (0) + + +#define nfsm_strsiz(s,m) \ + do { \ + nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ + if (((s) = fxdr_unsigned(int32_t,*tl)) > (m)) { \ + m_freem(mrep); \ + error = EBADRPC; \ + goto nfsmout; \ + } \ + } while (0) + +#define nfsm_srvstrsiz(s,m) \ + do { \ + nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ + if (((s) = fxdr_unsigned(int32_t,*tl)) > (m) || (s) <= 0) { \ + error = EBADRPC; \ + nfsm_reply(0); \ + } \ + } while (0) + +#define nfsm_srvnamesiz(s) \ + do { \ + nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \ + if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \ + error = NFSERR_NAMETOL; \ + if ((s) <= 0) \ + error = EBADRPC; \ + if (error) \ + nfsm_reply(0); \ + } while (0) + +#define nfsm_mtouio(p,s) \ + do {\ + if ((s) > 0 && \ + (t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \ + error = t1; \ + m_freem(mrep); \ + goto nfsmout; \ + } \ + } while (0) + +#define nfsm_uiotom(p,s) \ + do { \ + if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \ + error = t1; \ + m_freem(mreq); \ + goto nfsmout; \ + } \ + } while (0) + +#define nfsm_reqhead(v,a,s) \ + do { \ + mb = mreq = nfsm_reqh((v),(a),(s),&bpos); \ + } while (0) + +#define nfsm_reqdone \ + do { \ + m_freem(mrep); \ + nfsmout: \ + } while (0) + +#define nfsm_rndup(a) (((a)+3)&(~0x3)) + +#define nfsm_request(v, t, p, c) \ + do { \ + if ((error = nfs_request((v), mreq, (t), (p), \ + (c), &mrep, &md, &dpos)) != 0) { \ + if (error & NFSERR_RETERR) \ + error &= ~NFSERR_RETERR; \ + else \ + goto nfsmout; \ + } \ + } while (0) + +#define nfsm_strtom(a,s,m) \ + do {\ + if ((s) > (m)) { \ + m_freem(mreq); \ + error = ENAMETOOLONG; \ + goto nfsmout; \ + } \ + t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \ + if (t2 <= M_TRAILINGSPACE(mb)) { \ + nfsm_build(tl,u_int32_t *,t2); \ + *tl++ = txdr_unsigned(s); \ + *(tl+((t2>>2)-2)) = 0; \ + bcopy((const char *)(a), (caddr_t)tl, (s)); \ + } else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \ + error = t2; \ + m_freem(mreq); \ + goto nfsmout; \ + } \ + } while (0) + +#define nfsm_srvdone \ + do { \ + nfsmout: \ + return (error); \ + } while (0) + +#define nfsm_reply(s) \ + do { \ + nfsd->nd_repstat = error; \ + if (error && !(nfsd->nd_flag & ND_NFSV3)) \ + (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ + mrq, &mb, &bpos); \ + else \ + (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ + mrq, &mb, &bpos); \ + if (mrep != NULL) { \ + m_freem(mrep); \ + mrep = NULL; \ + } \ + mreq = *mrq; \ + if (error && (!(nfsd->nd_flag & ND_NFSV3) || \ + error == EBADRPC)) { \ + error = 0; \ + goto nfsmout; \ + } \ + } while (0) + +#define nfsm_writereply(s, v3) \ + do { \ + nfsd->nd_repstat = error; \ + if (error && !(v3)) \ + (void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \ + &mreq, &mb, &bpos); \ + else \ + (void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \ + &mreq, &mb, &bpos); \ + } while (0) + +#define nfsm_adv(s) \ + do { \ + t1 = mtod(md, caddr_t)+md->m_len-dpos; \ + if (t1 >= (s)) { \ + dpos += (s); \ + } else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \ + error = t1; \ + m_freem(mrep); \ + goto nfsmout; \ + } \ + } while (0) + +#define nfsm_srvmtofh(f) \ + do { \ + int fhlen; \ + if (nfsd->nd_flag & ND_NFSV3) { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + fhlen = fxdr_unsigned(int, *tl); \ + if (fhlen != 0 && fhlen != NFSX_V3FH) { \ + error = EBADRPC; \ + nfsm_reply(0); \ + } \ + } else { \ + fhlen = NFSX_V2FH; \ + } \ + if (fhlen != 0) { \ + nfsm_dissect(tl, u_int32_t *, fhlen); \ + bcopy((caddr_t)tl, (caddr_t)(f), fhlen); \ + } else {\ + bzero((caddr_t)(f), NFSX_V3FH); \ + } \ + } while (0) + +#define nfsm_clget \ + do { \ + if (bp >= be) { \ + if (mp == mb) \ + mp->m_len += bp-bpos; \ + MGET(mp, M_WAIT, MT_DATA); \ + MCLGET(mp, M_WAIT); \ + mp->m_len = NFSMSIZ(mp); \ + mp2->m_next = mp; \ + mp2 = mp; \ + bp = mtod(mp, caddr_t); \ + be = bp+mp->m_len; \ + } \ + tl = (u_int32_t *)bp; \ + } while (0) + +#define nfsm_srvfillattr(a, f) \ + do { \ + nfsm_srvfattr(nfsd, (a), (f)); \ + } while (0) + +#define nfsm_srvwcc_data(br, b, ar, a) \ + do { \ + nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos); \ + } while (0) + +#define nfsm_srvpostop_attr(r, a) \ + do { \ + nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos); \ + } while (0) + +#define nfsm_srvsattr(a) \ + do { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (*tl == nfs_true) { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + (a)->va_mode = nfstov_mode(*tl); \ + } \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (*tl == nfs_true) { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + (a)->va_uid = fxdr_unsigned(uid_t, *tl); \ + } \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (*tl == nfs_true) { \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + (a)->va_gid = fxdr_unsigned(gid_t, *tl); \ + } \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + if (*tl == nfs_true) { \ + nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ + (a)->va_size = fxdr_hyper(tl); \ + } \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + switch (fxdr_unsigned(int, *tl)) { \ + case NFSV3SATTRTIME_TOCLIENT: \ + nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ + fxdr_nfsv3time(tl, &(a)->va_atime); \ + break; \ + case NFSV3SATTRTIME_TOSERVER: \ + getnanotime(&(a)->va_atime); \ + break; \ + }; \ + nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \ + switch (fxdr_unsigned(int, *tl)) { \ + case NFSV3SATTRTIME_TOCLIENT: \ + nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \ + fxdr_nfsv3time(tl, &(a)->va_mtime); \ + break; \ + case NFSV3SATTRTIME_TOSERVER: \ + getnanotime(&(a)->va_mtime); \ + break; \ + } \ + } while (0) + +#endif |
