56ba093ddb
correct the pointers afterwards. It's kinda bogus that we generate a 24 (?) byte filehandle (2 x int32 fsid and 16 byte VFS fhandle) and pad it out to 64 bytes for NFSv3 with garbage. The whole point of NFSv3's variable filehandle length was to allow for shorter handles, both in memory and over the wire. I plan on taking a shot at fixing this shortly.
508 lines
15 KiB
C
508 lines
15 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 8.2 (Berkeley) 3/30/95
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* $Id: nfsm_subs.h,v 1.24 1999/06/23 04:44:14 julian 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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struct ucred;
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struct vnode;
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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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struct mbuf *nfsm_reqh __P((struct vnode *vp, u_long procid, int hsiz,
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caddr_t *bposp));
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struct mbuf *nfsm_rpchead __P((struct ucred *cr, int nmflag, int procid,
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int auth_type, int auth_len, char *auth_str,
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int verf_len, char *verf_str,
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struct mbuf *mrest, int mrest_len,
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struct mbuf **mbp, u_int32_t *xidp));
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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 if ((t1 = nfsm_disct(&md, &dpos, (s), t1, &cp2)) != 0){ \
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error = t1; \
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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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#define nfsm_fhtom(v, v3) \
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{ if (v3) { \
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t2 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED; \
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if (t2 <= M_TRAILINGSPACE(mb)) { \
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nfsm_build(tl, u_int32_t *, t2); \
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*tl++ = txdr_unsigned(VTONFS(v)->n_fhsize); \
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*(tl + ((t2>>2) - 2)) = 0; \
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bcopy((caddr_t)VTONFS(v)->n_fhp,(caddr_t)tl, \
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VTONFS(v)->n_fhsize); \
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} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \
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(caddr_t)VTONFS(v)->n_fhp, \
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VTONFS(v)->n_fhsize)) != 0) { \
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error = t2; \
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m_freem(mreq); \
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goto nfsmout; \
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} \
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} else { \
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nfsm_build(cp, caddr_t, NFSX_V2FH); \
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bcopy((caddr_t)VTONFS(v)->n_fhp, cp, NFSX_V2FH); \
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} }
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#define nfsm_srvfhtom(f, v3) \
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{ if (v3) { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED + NFSX_V3FH); \
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*tl++ = txdr_unsigned(NFSX_V3FH); \
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bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \
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} else { \
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nfsm_build(cp, caddr_t, NFSX_V2FH); \
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bcopy((caddr_t)(f), cp, NFSX_V2FH); \
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} }
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#define nfsm_srvpostop_fh(f) \
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{ nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED + NFSX_V3FH); \
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*tl++ = nfs_true; \
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*tl++ = txdr_unsigned(NFSX_V3FH); \
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bcopy((caddr_t)(f), (caddr_t)tl, NFSX_V3FH); \
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}
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#define nfsm_mtofh(d, v, v3, f) \
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{ struct nfsnode *ttnp; nfsfh_t *ttfhp; int ttfhsize; \
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if (v3) { \
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nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
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(f) = fxdr_unsigned(int, *tl); \
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} else \
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(f) = 1; \
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if (f) { \
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nfsm_getfh(ttfhp, ttfhsize, (v3)); \
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if ((t1 = nfs_nget((d)->v_mount, ttfhp, ttfhsize, \
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&ttnp)) != 0) { \
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error = t1; \
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m_freem(mrep); \
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goto nfsmout; \
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} \
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(v) = NFSTOV(ttnp); \
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} \
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if (v3) { \
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nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
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if (f) \
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(f) = fxdr_unsigned(int, *tl); \
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else if (fxdr_unsigned(int, *tl)) \
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nfsm_adv(NFSX_V3FATTR); \
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} \
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if (f) \
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nfsm_loadattr((v), (struct vattr *)0); \
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}
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#define nfsm_getfh(f, s, v3) \
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{ if (v3) { \
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nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(int, *tl)) <= 0 || \
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(s) > NFSX_V3FHMAX) { \
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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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} else \
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(s) = NFSX_V2FH; \
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nfsm_dissect((f), nfsfh_t *, nfsm_rndup(s)); }
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#define nfsm_loadattr(v, a) \
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{ struct vnode *ttvp = (v); \
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if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, (a))) != 0) { \
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error = t1; \
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m_freem(mrep); \
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goto nfsmout; \
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} \
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(v) = ttvp; }
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#define nfsm_postop_attr(v, f) \
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{ struct vnode *ttvp = (v); \
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nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
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if (((f) = fxdr_unsigned(int, *tl)) != 0) { \
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if ((t1 = nfs_loadattrcache(&ttvp, &md, &dpos, \
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(struct vattr *)0)) != 0) { \
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error = t1; \
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(f) = 0; \
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m_freem(mrep); \
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goto nfsmout; \
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} \
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(v) = ttvp; \
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} }
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/* Used as (f) for nfsm_wcc_data() */
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#define NFSV3_WCCRATTR 0
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#define NFSV3_WCCCHK 1
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#define nfsm_wcc_data(v, f) \
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{ int ttattrf, ttretf = 0; \
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nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
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if (*tl == nfs_true) { \
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nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \
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if (f) \
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ttretf = (VTONFS(v)->n_mtime == \
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fxdr_unsigned(u_int32_t, *(tl + 2))); \
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} \
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nfsm_postop_attr((v), ttattrf); \
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if (f) { \
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(f) = ttretf; \
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} else { \
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(f) = ttattrf; \
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} }
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/* If full is true, set all fields, otherwise just set mode and time fields */
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#define nfsm_v3attrbuild(a, full) \
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{ if ((a)->va_mode != (mode_t)VNOVAL) { \
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nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
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*tl++ = nfs_true; \
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*tl = txdr_unsigned((a)->va_mode); \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = nfs_false; \
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} \
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if ((full) && (a)->va_uid != (uid_t)VNOVAL) { \
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nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
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*tl++ = nfs_true; \
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*tl = txdr_unsigned((a)->va_uid); \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = nfs_false; \
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} \
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if ((full) && (a)->va_gid != (gid_t)VNOVAL) { \
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nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED); \
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*tl++ = nfs_true; \
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*tl = txdr_unsigned((a)->va_gid); \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = nfs_false; \
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} \
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if ((full) && (a)->va_size != VNOVAL) { \
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nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \
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*tl++ = nfs_true; \
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txdr_hyper((a)->va_size, tl); \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = nfs_false; \
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} \
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if ((a)->va_atime.tv_sec != VNOVAL) { \
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if ((a)->va_atime.tv_sec != time_second) { \
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nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \
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*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \
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txdr_nfsv3time(&(a)->va_atime, tl); \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \
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} \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \
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} \
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if ((a)->va_mtime.tv_sec != VNOVAL) { \
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if ((a)->va_mtime.tv_sec != time_second) { \
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nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED); \
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*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT); \
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txdr_nfsv3time(&(a)->va_mtime, tl); \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER); \
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} \
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} else { \
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED); \
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*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE); \
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} \
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}
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#define nfsm_strsiz(s,m) \
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{ nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(int32_t,*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_int32_t *,NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(int32_t,*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_srvnamesiz(s) \
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{ nfsm_dissect(tl,u_int32_t *,NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(int32_t,*tl)) > NFS_MAXNAMLEN) \
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error = NFSERR_NAMETOL; \
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if ((s) <= 0) \
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error = EBADRPC; \
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if (error) \
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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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(t1 = nfsm_mbuftouio(&md,(p),(s),&dpos)) != 0) { \
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error = t1; \
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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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if ((t1 = nfsm_uiotombuf((p),&mb,(s),&bpos)) != 0) { \
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error = t1; \
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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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if ((error = nfs_request((v), mreq, (t), (p), \
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(c), &mrep, &md, &dpos)) != 0) { \
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if (error & NFSERR_RETERR) \
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error &= ~NFSERR_RETERR; \
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else \
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goto nfsmout; \
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}
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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_int32_t *,t2); \
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*tl++ = txdr_unsigned(s); \
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*(tl+((t2>>2)-2)) = 0; \
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bcopy((const char *)(a), (caddr_t)tl, (s)); \
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} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \
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error = t2; \
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m_freem(mreq); \
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goto nfsmout; \
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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 && !(nfsd->nd_flag & ND_NFSV3)) \
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(void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \
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mrq, &mb, &bpos); \
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else \
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(void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \
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mrq, &mb, &bpos); \
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if (mrep != NULL) { \
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m_freem(mrep); \
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mrep = NULL; \
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} \
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mreq = *mrq; \
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if (error && (!(nfsd->nd_flag & ND_NFSV3) || \
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error == EBADRPC)) { \
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error = 0; \
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goto nfsmout; \
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} }
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#define nfsm_writereply(s, v3) \
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{ \
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nfsd->nd_repstat = error; \
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if (error && !(v3)) \
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(void) nfs_rephead(0, nfsd, slp, error, cache, &frev, \
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&mreq, &mb, &bpos); \
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else \
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(void) nfs_rephead((s), nfsd, slp, error, cache, &frev, \
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&mreq, &mb, &bpos); \
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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); \
|
|
} else if ((t1 = nfs_adv(&md, &dpos, (s), t1)) != 0) { \
|
|
error = t1; \
|
|
m_freem(mrep); \
|
|
goto nfsmout; \
|
|
} }
|
|
|
|
#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 \
|
|
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
|
|
|
|
#define nfsm_srvfillattr(a, f) \
|
|
nfsm_srvfattr(nfsd, (a), (f))
|
|
|
|
#define nfsm_srvwcc_data(br, b, ar, a) \
|
|
nfsm_srvwcc(nfsd, (br), (b), (ar), (a), &mb, &bpos)
|
|
|
|
#define nfsm_srvpostop_attr(r, a) \
|
|
nfsm_srvpostopattr(nfsd, (r), (a), &mb, &bpos)
|
|
|
|
#define nfsm_srvsattr(a) \
|
|
{ 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; \
|
|
}; }
|
|
|
|
#endif
|