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6ae324074a
But mostly it is changes to use the list-maintenance macros instead of doing the pointer-gymnastics by hand. Obtained from: NetBSD
287 lines
8.4 KiB
C
287 lines
8.4 KiB
C
/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93
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* $Id: nfsm_subs.h,v 1.4 1994/10/02 17:27:05 phk Exp $
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*/
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#ifndef _NFS_NFSM_SUBS_H_
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#define _NFS_NFSM_SUBS_H_
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/*
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* These macros do strange and peculiar things to mbuf chains for
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* the assistance of the nfs code. To attempt to use them for any
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* other purpose will be dangerous. (they make weird assumptions)
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*/
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/*
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* First define what the actual subs. return
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*/
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extern struct mbuf *nfsm_reqh();
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#define M_HASCL(m) ((m)->m_flags & M_EXT)
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#define NFSMINOFF(m) \
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if (M_HASCL(m)) \
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(m)->m_data = (m)->m_ext.ext_buf; \
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else if ((m)->m_flags & M_PKTHDR) \
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(m)->m_data = (m)->m_pktdat; \
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else \
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(m)->m_data = (m)->m_dat
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#define NFSMADV(m, s) (m)->m_data += (s)
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#define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
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(((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
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/*
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* Now for the macros that do the simple stuff and call the functions
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* for the hard stuff.
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* These macros use several vars. declared in nfsm_reqhead and these
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* vars. must not be used elsewhere unless you are careful not to corrupt
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* them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
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* that may be used so long as the value is not expected to retained
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* after a macro.
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* I know, this is kind of dorkey, but it makes the actual op functions
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* fairly clean and deals with the mess caused by the xdr discriminating
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* unions.
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*/
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#define nfsm_build(a,c,s) \
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{ if ((s) > M_TRAILINGSPACE(mb)) { \
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MGET(mb2, M_WAIT, MT_DATA); \
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if ((s) > MLEN) \
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panic("build > MLEN"); \
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mb->m_next = mb2; \
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mb = mb2; \
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mb->m_len = 0; \
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bpos = mtod(mb, caddr_t); \
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} \
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(a) = (c)(bpos); \
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mb->m_len += (s); \
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bpos += (s); }
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#define nfsm_dissect(a,c,s) \
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{ t1 = mtod(md, caddr_t)+md->m_len-dpos; \
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if (t1 >= (s)) { \
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(a) = (c)(dpos); \
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dpos += (s); \
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} else { \
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error = nfsm_disct(&md, &dpos, (s), t1, &cp2); \
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if (error) { \
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m_freem(mrep); \
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goto nfsmout; \
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} else { \
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(a) = (c)cp2; \
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} \
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} }
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#define nfsm_fhtom(v) \
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nfsm_build(cp,caddr_t,NFSX_FH); \
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bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH)
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#define nfsm_srvfhtom(f) \
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nfsm_build(cp,caddr_t,NFSX_FH); \
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bcopy((caddr_t)(f), cp, NFSX_FH)
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#define nfsm_mtofh(d,v) \
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{ struct nfsnode *np; nfsv2fh_t *fhp; \
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nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \
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error = nfs_nget((d)->v_mount, fhp, &np); \
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if (error) { \
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m_freem(mrep); \
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goto nfsmout; \
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} \
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(v) = NFSTOV(np); \
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nfsm_loadattr(v, (struct vattr *)0); \
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}
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#define nfsm_loadattr(v,a) \
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{ struct vnode *tvp = (v); \
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error = nfs_loadattrcache(&tvp, &md, &dpos, (a)); \
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if (error) { \
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m_freem(mrep); \
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goto nfsmout; \
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} \
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(v) = tvp; }
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#define nfsm_strsiz(s,m) \
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{ nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \
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m_freem(mrep); \
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error = EBADRPC; \
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goto nfsmout; \
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} }
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#define nfsm_srvstrsiz(s,m) \
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{ nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \
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error = EBADRPC; \
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nfsm_reply(0); \
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} }
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#define nfsm_mtouio(p,s) \
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if ((s) > 0 && \
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(error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \
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m_freem(mrep); \
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goto nfsmout; \
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}
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#define nfsm_uiotom(p,s) \
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error = nfsm_uiotombuf((p),&mb,(s),&bpos); \
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if (error) { \
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m_freem(mreq); \
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goto nfsmout; \
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}
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#define nfsm_reqhead(v,a,s) \
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mb = mreq = nfsm_reqh((v),(a),(s),&bpos)
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#define nfsm_reqdone m_freem(mrep); \
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nfsmout:
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#define nfsm_rndup(a) (((a)+3)&(~0x3))
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#define nfsm_request(v, t, p, c) \
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error = nfs_request((v), mreq, (t), (p), \
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(c), &mrep, &md, &dpos); \
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if (error) \
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goto nfsmout
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#define nfsm_strtom(a,s,m) \
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if ((s) > (m)) { \
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m_freem(mreq); \
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error = ENAMETOOLONG; \
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goto nfsmout; \
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} \
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t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \
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if (t2 <= M_TRAILINGSPACE(mb)) { \
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nfsm_build(tl,u_long *,t2); \
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*tl++ = txdr_unsigned(s); \
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*(tl+((t2>>2)-2)) = 0; \
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bcopy((caddr_t)(a), (caddr_t)tl, (s)); \
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} else { \
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error = nfsm_strtmbuf(&mb, &bpos, (a), (s)); \
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if (error) { \
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m_freem(mreq); \
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goto nfsmout; \
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} \
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}
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#define nfsm_srvdone \
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nfsmout: \
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return(error)
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#define nfsm_reply(s) \
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{ \
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nfsd->nd_repstat = error; \
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if (error) \
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(void) nfs_rephead(0, nfsd, error, cache, &frev, \
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mrq, &mb, &bpos); \
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else \
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(void) nfs_rephead((s), nfsd, error, cache, &frev, \
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mrq, &mb, &bpos); \
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m_freem(mrep); \
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mreq = *mrq; \
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if (error) \
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return(0); \
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}
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#define nfsm_adv(s) \
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t1 = mtod(md, caddr_t)+md->m_len-dpos; \
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if (t1 >= (s)) { \
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dpos += (s); \
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} else { \
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error = nfs_adv(&md, &dpos, (s), t1); \
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if (error) { \
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m_freem(mrep); \
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goto nfsmout; \
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} \
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}
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#define nfsm_srvmtofh(f) \
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nfsm_dissect(tl, u_long *, NFSX_FH); \
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bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH)
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#define nfsm_clget \
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if (bp >= be) { \
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if (mp == mb) \
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mp->m_len += bp-bpos; \
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MGET(mp, M_WAIT, MT_DATA); \
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MCLGET(mp, M_WAIT); \
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mp->m_len = NFSMSIZ(mp); \
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mp2->m_next = mp; \
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mp2 = mp; \
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bp = mtod(mp, caddr_t); \
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be = bp+mp->m_len; \
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} \
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tl = (u_long *)bp
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#define nfsm_srvfillattr \
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fp->fa_type = vtonfs_type(vap->va_type); \
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fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \
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fp->fa_nlink = txdr_unsigned(vap->va_nlink); \
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fp->fa_uid = txdr_unsigned(vap->va_uid); \
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fp->fa_gid = txdr_unsigned(vap->va_gid); \
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if (nfsd->nd_nqlflag == NQL_NOVAL) { \
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fp->fa_nfsblocksize = txdr_unsigned(vap->va_blocksize); \
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if (vap->va_type == VFIFO) \
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fp->fa_nfsrdev = 0xffffffff; \
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else \
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fp->fa_nfsrdev = txdr_unsigned(vap->va_rdev); \
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fp->fa_nfsfsid = txdr_unsigned(vap->va_fsid); \
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fp->fa_nfsfileid = txdr_unsigned(vap->va_fileid); \
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fp->fa_nfssize = txdr_unsigned(vap->va_size); \
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fp->fa_nfsblocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \
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txdr_nfstime(&vap->va_atime, &fp->fa_nfsatime); \
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txdr_nfstime(&vap->va_mtime, &fp->fa_nfsmtime); \
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txdr_nfstime(&vap->va_ctime, &fp->fa_nfsctime); \
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} else { \
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fp->fa_nqblocksize = txdr_unsigned(vap->va_blocksize); \
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if (vap->va_type == VFIFO) \
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fp->fa_nqrdev = 0xffffffff; \
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else \
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fp->fa_nqrdev = txdr_unsigned(vap->va_rdev); \
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fp->fa_nqfsid = txdr_unsigned(vap->va_fsid); \
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fp->fa_nqfileid = txdr_unsigned(vap->va_fileid); \
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txdr_hyper(&vap->va_size, &fp->fa_nqsize); \
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txdr_hyper(&vap->va_bytes, &fp->fa_nqbytes); \
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txdr_nqtime(&vap->va_atime, &fp->fa_nqatime); \
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txdr_nqtime(&vap->va_mtime, &fp->fa_nqmtime); \
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txdr_nqtime(&vap->va_ctime, &fp->fa_nqctime); \
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fp->fa_nqflags = txdr_unsigned(vap->va_flags); \
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fp->fa_nqgen = txdr_unsigned(vap->va_gen); \
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txdr_hyper(&vap->va_filerev, &fp->fa_nqfilerev); \
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}
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#endif
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