From 27464aaa8e6ad0a90df705f3dd8ea4c48ffefd04 Mon Sep 17 00:00:00 2001 From: rgrimes Date: Tue, 24 May 1994 10:09:53 +0000 Subject: BSD 4.4 Lite Kernel Sources --- sys/nfsserver/nfsm_subs.h | 269 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 sys/nfsserver/nfsm_subs.h (limited to 'sys/nfsserver/nfsm_subs.h') diff --git a/sys/nfsserver/nfsm_subs.h b/sys/nfsserver/nfsm_subs.h new file mode 100644 index 0000000..879db36 --- /dev/null +++ b/sys/nfsserver/nfsm_subs.h @@ -0,0 +1,269 @@ +/* + * 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 8.1 (Berkeley) 6/16/93 + */ + +/* + * 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 + */ +extern struct mbuf *nfsm_reqh(); + +#define M_HASCL(m) ((m)->m_flags & M_EXT) +#define NFSMINOFF(m) \ + 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 +#define NFSMADV(m, s) (m)->m_data += (s) +#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) \ + { 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); } + +#define nfsm_dissect(a,c,s) \ + { t1 = mtod(md, caddr_t)+md->m_len-dpos; \ + if (t1 >= (s)) { \ + (a) = (c)(dpos); \ + dpos += (s); \ + } else if (error = nfsm_disct(&md, &dpos, (s), t1, &cp2)) { \ + m_freem(mrep); \ + goto nfsmout; \ + } else { \ + (a) = (c)cp2; \ + } } + +#define nfsm_fhtom(v) \ + nfsm_build(cp,caddr_t,NFSX_FH); \ + bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH) + +#define nfsm_srvfhtom(f) \ + nfsm_build(cp,caddr_t,NFSX_FH); \ + bcopy((caddr_t)(f), cp, NFSX_FH) + +#define nfsm_mtofh(d,v) \ + { struct nfsnode *np; nfsv2fh_t *fhp; \ + nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \ + if (error = nfs_nget((d)->v_mount, fhp, &np)) { \ + m_freem(mrep); \ + goto nfsmout; \ + } \ + (v) = NFSTOV(np); \ + nfsm_loadattr(v, (struct vattr *)0); \ + } + +#define nfsm_loadattr(v,a) \ + { struct vnode *tvp = (v); \ + if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \ + m_freem(mrep); \ + goto nfsmout; \ + } \ + (v) = tvp; } + +#define nfsm_strsiz(s,m) \ + { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ + if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \ + m_freem(mrep); \ + error = EBADRPC; \ + goto nfsmout; \ + } } + +#define nfsm_srvstrsiz(s,m) \ + { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \ + if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \ + error = EBADRPC; \ + nfsm_reply(0); \ + } } + +#define nfsm_mtouio(p,s) \ + if ((s) > 0 && \ + (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \ + m_freem(mrep); \ + goto nfsmout; \ + } + +#define nfsm_uiotom(p,s) \ + if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \ + m_freem(mreq); \ + goto nfsmout; \ + } + +#define nfsm_reqhead(v,a,s) \ + mb = mreq = nfsm_reqh((v),(a),(s),&bpos) + +#define nfsm_reqdone m_freem(mrep); \ + nfsmout: + +#define nfsm_rndup(a) (((a)+3)&(~0x3)) + +#define nfsm_request(v, t, p, c) \ + if (error = nfs_request((v), mreq, (t), (p), \ + (c), &mrep, &md, &dpos)) \ + goto nfsmout + +#define nfsm_strtom(a,s,m) \ + 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_long *,t2); \ + *tl++ = txdr_unsigned(s); \ + *(tl+((t2>>2)-2)) = 0; \ + bcopy((caddr_t)(a), (caddr_t)tl, (s)); \ + } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \ + m_freem(mreq); \ + goto nfsmout; \ + } + +#define nfsm_srvdone \ + nfsmout: \ + return(error) + +#define nfsm_reply(s) \ + { \ + nfsd->nd_repstat = error; \ + if (error) \ + (void) nfs_rephead(0, nfsd, error, cache, &frev, \ + mrq, &mb, &bpos); \ + else \ + (void) nfs_rephead((s), nfsd, error, cache, &frev, \ + mrq, &mb, &bpos); \ + m_freem(mrep); \ + mreq = *mrq; \ + if (error) \ + return(0); \ + } + +#define nfsm_adv(s) \ + t1 = mtod(md, caddr_t)+md->m_len-dpos; \ + if (t1 >= (s)) { \ + dpos += (s); \ + } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \ + m_freem(mrep); \ + goto nfsmout; \ + } + +#define nfsm_srvmtofh(f) \ + nfsm_dissect(tl, u_long *, NFSX_FH); \ + bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH) + +#define nfsm_clget \ + 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_long *)bp + +#define nfsm_srvfillattr \ + fp->fa_type = vtonfs_type(vap->va_type); \ + fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \ + fp->fa_nlink = txdr_unsigned(vap->va_nlink); \ + fp->fa_uid = txdr_unsigned(vap->va_uid); \ + fp->fa_gid = txdr_unsigned(vap->va_gid); \ + if (nfsd->nd_nqlflag == NQL_NOVAL) { \ + fp->fa_nfsblocksize = txdr_unsigned(vap->va_blocksize); \ + if (vap->va_type == VFIFO) \ + fp->fa_nfsrdev = 0xffffffff; \ + else \ + fp->fa_nfsrdev = txdr_unsigned(vap->va_rdev); \ + fp->fa_nfsfsid = txdr_unsigned(vap->va_fsid); \ + fp->fa_nfsfileid = txdr_unsigned(vap->va_fileid); \ + fp->fa_nfssize = txdr_unsigned(vap->va_size); \ + fp->fa_nfsblocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \ + txdr_nfstime(&vap->va_atime, &fp->fa_nfsatime); \ + txdr_nfstime(&vap->va_mtime, &fp->fa_nfsmtime); \ + fp->fa_nfsctime.nfs_sec = txdr_unsigned(vap->va_ctime.ts_sec); \ + fp->fa_nfsctime.nfs_usec = txdr_unsigned(vap->va_gen); \ + } else { \ + fp->fa_nqblocksize = txdr_unsigned(vap->va_blocksize); \ + if (vap->va_type == VFIFO) \ + fp->fa_nqrdev = 0xffffffff; \ + else \ + fp->fa_nqrdev = txdr_unsigned(vap->va_rdev); \ + fp->fa_nqfsid = txdr_unsigned(vap->va_fsid); \ + fp->fa_nqfileid = txdr_unsigned(vap->va_fileid); \ + txdr_hyper(&vap->va_size, &fp->fa_nqsize); \ + txdr_hyper(&vap->va_bytes, &fp->fa_nqbytes); \ + txdr_nqtime(&vap->va_atime, &fp->fa_nqatime); \ + txdr_nqtime(&vap->va_mtime, &fp->fa_nqmtime); \ + txdr_nqtime(&vap->va_ctime, &fp->fa_nqctime); \ + fp->fa_nqflags = txdr_unsigned(vap->va_flags); \ + fp->fa_nqgen = txdr_unsigned(vap->va_gen); \ + txdr_hyper(&vap->va_filerev, &fp->fa_nqfilerev); \ + } + -- cgit v1.1