565 lines
16 KiB
C
565 lines
16 KiB
C
/* $NetBSD: nfsm_subs.h,v 1.53 2013/09/14 22:29:08 martin Exp $ */
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/*
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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. 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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*/
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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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#define M_HASCL(m) ((m)->m_flags & M_EXT)
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#define NFSMADV(m, s) (m)->m_data += (s)
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#define NFSMSIZ(m) ((M_HASCL(m)) ? (m)->m_ext.ext_size : \
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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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struct mbuf *mb2; \
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mb2 = m_get(M_WAIT, MT_DATA); \
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MCLAIM(mb2, &nfs_mowner); \
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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, char *); \
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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_aligned(p) ALIGNED_POINTER(p,u_int32_t)
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#define nfsm_dissect(a, c, s) \
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{ t1 = mtod(md, char *) + md->m_len-dpos; \
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if (t1 >= (s) && nfsm_aligned(dpos)) { \
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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(n, v3) \
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{ if (v3) { \
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t2 = nfsm_rndup((n)->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((n)->n_fhsize); \
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*(tl + ((t2>>2) - 2)) = 0; \
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memcpy(tl,(n)->n_fhp, (n)->n_fhsize); \
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} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, \
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(void *)(n)->n_fhp, (n)->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, void *, NFSX_V2FH); \
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memcpy(cp, (n)->n_fhp, 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 + \
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NFSRVFH_SIZE(f)); \
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*tl++ = txdr_unsigned(NFSRVFH_SIZE(f)); \
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memcpy(tl, NFSRVFH_DATA(f), NFSRVFH_SIZE(f)); \
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} else { \
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KASSERT(NFSRVFH_SIZE(f) == NFSX_V2FH); \
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nfsm_build(cp, void *, NFSX_V2FH); \
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memcpy(cp, NFSRVFH_DATA(f), 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 *, \
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2 * NFSX_UNSIGNED + NFSRVFH_SIZE(f)); \
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*tl++ = nfs_true; \
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*tl++ = txdr_unsigned(NFSRVFH_SIZE(f)); \
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memcpy(tl, NFSRVFH_DATA(f), NFSRVFH_SIZE(f)); \
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}
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/*
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* nfsm_mtofh: dissect a "resulted obj" part of create-like operations
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* like mkdir.
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*
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* for nfsv3, dissect post_op_fh3 and following post_op_attr.
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* for nfsv2, dissect fhandle and following fattr.
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*
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* d: (IN) the vnode of the parent directry.
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* v: (OUT) the corresponding vnode (we allocate one if needed)
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* v3: (IN) true for nfsv3.
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* f: (OUT) true if we got valid filehandle. always true for nfsv2.
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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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int hasattr = 0; \
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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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hasattr = 1; \
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} \
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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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hasattr = 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 && hasattr) \
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nfsm_loadattr((v), (struct vattr *)0, 0); \
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}
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/*
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* nfsm_getfh: dissect a filehandle.
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*
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* f: (OUT) a filehandle.
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* s: (OUT) size of the filehandle in bytes.
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* v3: (IN) true if nfsv3.
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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, flags) \
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{ struct vnode *ttvp = (v); \
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if ((t1 = nfsm_loadattrcache(&ttvp, &md, &dpos, (a), (flags))) \
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!= 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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/*
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* nfsm_postop_attr: process nfsv3 post_op_attr
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*
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* dissect post_op_attr. if we got a one,
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* call nfsm_loadattrcache to update attribute cache.
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*
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* v: (IN/OUT) the corresponding vnode
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* f: (OUT) true if we got valid attribute
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* flags: (IN) flags for nfsm_loadattrcache
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*/
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#define nfsm_postop_attr(v, f, flags) \
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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 = nfsm_loadattrcache(&ttvp, &md, &dpos, \
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(struct vattr *)0, (flags))) != 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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/*
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* nfsm_wcc_data: process nfsv3 wcc_data
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*
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* dissect pre_op_attr and then let nfsm_postop_attr dissect post_op_attr.
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*
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* v: (IN/OUT) the corresponding vnode
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* f: (IN/OUT)
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* NFSV3_WCCRATTR return true if we got valid post_op_attr.
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* NFSV3_WCCCHK return true if pre_op_attr's mtime is the same
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* as our n_mtime. (ie. our cache isn't stale.)
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* flags: (IN) flags for nfsm_loadattrcache
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* docheck: (IN) true if timestamp change is expected
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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, flags, docheck) \
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{ int ttattrf, ttretf = 0, renewctime = 0, renewnctime = 0; \
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struct timespec ctime, mtime; \
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struct nfsnode *nfsp = VTONFS(v); \
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bool haspreopattr = false; \
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nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
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if (*tl == nfs_true) { \
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haspreopattr = true; \
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nfsm_dissect(tl, u_int32_t *, 6 * NFSX_UNSIGNED); \
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fxdr_nfsv3time(tl + 2, &mtime); \
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fxdr_nfsv3time(tl + 4, &ctime); \
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if (nfsp->n_ctime == ctime.tv_sec) \
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renewctime = 1; \
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if ((v)->v_type == VDIR) { \
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if (timespeccmp(&nfsp->n_nctime, &ctime, ==)) \
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renewnctime = 1; \
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} \
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if (f) { \
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ttretf = timespeccmp(&nfsp->n_mtime, &mtime, ==);\
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} \
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} \
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nfsm_postop_attr((v), ttattrf, (flags)); \
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nfsp = VTONFS(v); \
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if (ttattrf) { \
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if (haspreopattr && \
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nfs_check_wccdata(nfsp, &ctime, &mtime, (docheck))) \
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renewctime = renewnctime = ttretf = 0; \
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if (renewctime) \
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nfsp->n_ctime = nfsp->n_vattr->va_ctime.tv_sec; \
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if (renewnctime) \
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nfsp->n_nctime = nfsp->n_vattr->va_ctime; \
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} \
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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,uint32_t *,NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(uint32_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_srvnamesiz(s) \
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{ nfsm_dissect(tl,uint32_t *,NFSX_UNSIGNED); \
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if (((s) = fxdr_unsigned(uint32_t,*tl)) > NFS_MAXNAMLEN) \
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error = NFSERR_NAMETOL; \
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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(n,a,s) \
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mb = mreq = nfsm_reqh((n),(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_padlen(a) (nfsm_rndup(a) - (a))
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#define nfsm_request1(v, t, p, c, rexmitp) \
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if ((error = nfs_request((v), mreq, (t), (p), \
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(c), &mrep, &md, &dpos, (rexmitp))) != 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_request(v, t, p, c) nfsm_request1((v), (t), (p), (c), NULL)
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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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memcpy(tl, (const char *)(a), (s)); \
|
|
} else if ((t2 = nfsm_strtmbuf(&mb, &bpos, (a), (s))) != 0) { \
|
|
error = t2; \
|
|
m_freem(mreq); \
|
|
goto nfsmout; \
|
|
}
|
|
|
|
#define nfsm_srvdone \
|
|
nfsmout: \
|
|
return(error)
|
|
|
|
#define nfsm_reply(s) \
|
|
{ \
|
|
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; \
|
|
} \
|
|
}
|
|
|
|
#define nfsm_writereply(s, v3) \
|
|
{ \
|
|
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); \
|
|
}
|
|
|
|
#define nfsm_adv(s) \
|
|
{ t1 = mtod(md, char *) + 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; \
|
|
} }
|
|
|
|
#define nfsm_srvmtofh(nsfh) \
|
|
{ int fhlen = NFSX_V3FH; \
|
|
if (nfsd->nd_flag & ND_NFSV3) { \
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED); \
|
|
fhlen = fxdr_unsigned(int, *tl); \
|
|
if (fhlen > NFSX_V3FHMAX || \
|
|
(fhlen < FHANDLE_SIZE_MIN && fhlen > 0)) { \
|
|
error = EBADRPC; \
|
|
nfsm_reply(0); \
|
|
} \
|
|
} else { \
|
|
fhlen = NFSX_V2FH; \
|
|
} \
|
|
(nsfh)->nsfh_size = fhlen; \
|
|
if (fhlen != 0) { \
|
|
nfsm_dissect(tl, u_int32_t *, fhlen); \
|
|
memcpy(NFSRVFH_DATA(nsfh), tl, fhlen); \
|
|
} \
|
|
}
|
|
|
|
#define nfsm_clget \
|
|
if (bp >= be) { \
|
|
if (mp == mb) \
|
|
mp->m_len += bp-bpos; \
|
|
mp = m_get(M_WAIT, MT_DATA); \
|
|
MCLAIM(mp, &nfs_mowner); \
|
|
m_clget(mp, M_WAIT); \
|
|
mp->m_len = NFSMSIZ(mp); \
|
|
mp2->m_next = mp; \
|
|
mp2 = mp; \
|
|
bp = mtod(mp, char *); \
|
|
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); \
|
|
(a)->va_vaflags |= VA_UTIMES_NULL; \
|
|
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); \
|
|
(a)->va_vaflags &= ~VA_UTIMES_NULL; \
|
|
break; \
|
|
case NFSV3SATTRTIME_TOSERVER: \
|
|
getnanotime(&(a)->va_mtime); \
|
|
(a)->va_vaflags |= VA_UTIMES_NULL; \
|
|
break; \
|
|
}; }
|
|
|
|
#endif
|