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- /* $NetBSD: nfsm_subs.h,v 1.6 1995/05/23 06:25:30 mycroft Exp $ */
-
- /*
- * Copyright (c) 1989, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Rick Macklem at The University of Guelph.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93
- */
-
- /*
- * These macros do strange and peculiar things to mbuf chains for
- * the assistance of the nfs code. To attempt to use them for any
- * other purpose will be dangerous. (they make weird assumptions)
- */
-
- /*
- * First define what the actual subs. return
- */
- extern struct mbuf *nfsm_reqh();
-
- #define M_HASCL(m) ((m)->m_flags & M_EXT)
- #define NFSMINOFF(m) \
- if (M_HASCL(m)) \
- (m)->m_data = (m)->m_ext.ext_buf; \
- else if ((m)->m_flags & M_PKTHDR) \
- (m)->m_data = (m)->m_pktdat; \
- else \
- (m)->m_data = (m)->m_dat
- #define NFSMADV(m, s) (m)->m_data += (s)
- #define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
- (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
-
- /*
- * Now for the macros that do the simple stuff and call the functions
- * for the hard stuff.
- * These macros use several vars. declared in nfsm_reqhead and these
- * vars. must not be used elsewhere unless you are careful not to corrupt
- * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
- * that may be used so long as the value is not expected to retained
- * after a macro.
- * I know, this is kind of dorkey, but it makes the actual op functions
- * fairly clean and deals with the mess caused by the xdr discriminating
- * unions.
- */
-
- #define nfsm_build(a,c,s) \
- { if ((s) > M_TRAILINGSPACE(mb)) { \
- MGET(mb2, M_WAIT, MT_DATA); \
- if ((s) > MLEN) \
- panic("build > MLEN"); \
- mb->m_next = mb2; \
- mb = mb2; \
- mb->m_len = 0; \
- bpos = mtod(mb, caddr_t); \
- } \
- (a) = (c)(bpos); \
- mb->m_len += (s); \
- bpos += (s); }
-
- #define nfsm_dissect(a,c,s) \
- { t1 = mtod(md, caddr_t)+md->m_len-dpos; \
- if (t1 >= (s)) { \
- (a) = (c)(dpos); \
- dpos += (s); \
- } else if (error = nfsm_disct(&md, &dpos, (s), t1, &cp2)) { \
- m_freem(mrep); \
- goto nfsmout; \
- } else { \
- (a) = (c)cp2; \
- } }
-
- #define nfsm_fhtom(v) \
- nfsm_build(cp,caddr_t,NFSX_FH); \
- bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH)
-
- #define nfsm_srvfhtom(f) \
- nfsm_build(cp,caddr_t,NFSX_FH); \
- bcopy((caddr_t)(f), cp, NFSX_FH)
-
- #define nfsm_mtofh(d,v) \
- { struct nfsnode *np; nfsv2fh_t *fhp; \
- nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \
- if (error = nfs_nget((d)->v_mount, fhp, &np)) { \
- m_freem(mrep); \
- goto nfsmout; \
- } \
- (v) = NFSTOV(np); \
- nfsm_loadattr(v, (struct vattr *)0); \
- }
-
- #define nfsm_loadattr(v,a) \
- { struct vnode *tvp = (v); \
- if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \
- m_freem(mrep); \
- goto nfsmout; \
- } \
- (v) = tvp; }
-
- #define nfsm_strsiz(s,m) \
- { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \
- if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \
- m_freem(mrep); \
- error = EBADRPC; \
- goto nfsmout; \
- } }
-
- #define nfsm_srvstrsiz(s,m) \
- { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \
- if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \
- error = EBADRPC; \
- nfsm_reply(0); \
- } }
-
- #define nfsm_mtouio(p,s) \
- if ((s) > 0 && \
- (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \
- m_freem(mrep); \
- goto nfsmout; \
- }
-
- #define nfsm_uiotom(p,s) \
- if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \
- m_freem(mreq); \
- goto nfsmout; \
- }
-
- #define nfsm_reqhead(v,a,s) \
- mb = mreq = nfsm_reqh((v),(a),(s),&bpos)
-
- #define nfsm_reqdone m_freem(mrep); \
- nfsmout:
-
- #define nfsm_rndup(a) (((a)+3)&(~0x3))
-
- #define nfsm_request(v, t, p, c) \
- if (error = nfs_request((v), mreq, (t), (p), \
- (c), &mrep, &md, &dpos)) \
- goto nfsmout
-
- #define nfsm_strtom(a,s,m) \
- if ((s) > (m)) { \
- m_freem(mreq); \
- error = ENAMETOOLONG; \
- goto nfsmout; \
- } \
- t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \
- if (t2 <= M_TRAILINGSPACE(mb)) { \
- nfsm_build(tl,u_long *,t2); \
- *tl++ = txdr_unsigned(s); \
- *(tl+((t2>>2)-2)) = 0; \
- bcopy((caddr_t)(a), (caddr_t)tl, (s)); \
- } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \
- m_freem(mreq); \
- goto nfsmout; \
- }
-
- #define nfsm_srvdone \
- nfsmout: \
- return(error)
-
- #define nfsm_reply(s) \
- { \
- nfsd->nd_repstat = error; \
- if (error) \
- (void) nfs_rephead(0, nfsd, error, cache, &frev, \
- mrq, &mb, &bpos); \
- else \
- (void) nfs_rephead((s), nfsd, error, cache, &frev, \
- mrq, &mb, &bpos); \
- m_freem(mrep); \
- mreq = *mrq; \
- if (error) \
- return(0); \
- }
-
- #define nfsm_adv(s) \
- t1 = mtod(md, caddr_t)+md->m_len-dpos; \
- if (t1 >= (s)) { \
- dpos += (s); \
- } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \
- m_freem(mrep); \
- goto nfsmout; \
- }
-
- #define nfsm_srvmtofh(f) \
- nfsm_dissect(tl, u_long *, NFSX_FH); \
- bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH)
-
- #define nfsm_clget \
- if (bp >= be) { \
- if (mp == mb) \
- mp->m_len += bp-bpos; \
- MGET(mp, M_WAIT, MT_DATA); \
- MCLGET(mp, M_WAIT); \
- mp->m_len = NFSMSIZ(mp); \
- mp2->m_next = mp; \
- mp2 = mp; \
- bp = mtod(mp, caddr_t); \
- be = bp+mp->m_len; \
- } \
- tl = (u_long *)bp
-
- #define nfsm_srvfillattr \
- fp->fa_type = vtonfs_type(va.va_type); \
- fp->fa_mode = vtonfs_mode(va.va_type, va.va_mode); \
- fp->fa_nlink = txdr_unsigned(va.va_nlink); \
- fp->fa_uid = txdr_unsigned(va.va_uid); \
- fp->fa_gid = txdr_unsigned(va.va_gid); \
- if (nfsd->nd_nqlflag == NQL_NOVAL) { \
- fp->fa_nfsblocksize = txdr_unsigned(va.va_blocksize); \
- if (va.va_type == VFIFO) \
- fp->fa_nfsrdev = 0xffffffff; \
- else \
- fp->fa_nfsrdev = txdr_unsigned(va.va_rdev); \
- fp->fa_nfsfsid = txdr_unsigned(va.va_fsid); \
- fp->fa_nfsfileid = txdr_unsigned(va.va_fileid); \
- fp->fa_nfssize = txdr_unsigned(va.va_size); \
- fp->fa_nfsblocks = txdr_unsigned(va.va_bytes / NFS_FABLKSIZE); \
- txdr_nfstime(&va.va_atime, &fp->fa_nfsatime); \
- txdr_nfstime(&va.va_mtime, &fp->fa_nfsmtime); \
- txdr_nfstime(&va.va_ctime, &fp->fa_nfsctime); \
- } else { \
- fp->fa_nqblocksize = txdr_unsigned(va.va_blocksize); \
- if (va.va_type == VFIFO) \
- fp->fa_nqrdev = 0xffffffff; \
- else \
- fp->fa_nqrdev = txdr_unsigned(va.va_rdev); \
- fp->fa_nqfsid = txdr_unsigned(va.va_fsid); \
- fp->fa_nqfileid = txdr_unsigned(va.va_fileid); \
- txdr_hyper(&va.va_size, &fp->fa_nqsize); \
- txdr_hyper(&va.va_bytes, &fp->fa_nqbytes); \
- txdr_nqtime(&va.va_atime, &fp->fa_nqatime); \
- txdr_nqtime(&va.va_mtime, &fp->fa_nqmtime); \
- txdr_nqtime(&va.va_ctime, &fp->fa_nqctime); \
- fp->fa_nqflags = txdr_unsigned(va.va_flags); \
- fp->fa_nqgen = txdr_unsigned(va.va_gen); \
- txdr_hyper(&va.va_filerev, &fp->fa_nqfilerev); \
- }
-
-