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authorrgrimes <rgrimes@FreeBSD.org>1994-05-24 10:09:53 +0000
committerrgrimes <rgrimes@FreeBSD.org>1994-05-24 10:09:53 +0000
commit27464aaa8e6ad0a90df705f3dd8ea4c48ffefd04 (patch)
tree498662170037963c8b911613f2622e38efea4434 /sys/nfs/nfs_common.h
parent41dbbe7dea1bb3e50798efb3ea01e967bf27364a (diff)
downloadFreeBSD-src-27464aaa8e6ad0a90df705f3dd8ea4c48ffefd04.zip
FreeBSD-src-27464aaa8e6ad0a90df705f3dd8ea4c48ffefd04.tar.gz
BSD 4.4 Lite Kernel Sources
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+/*
+ * Copyright (c) 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Rick Macklem at The University of Guelph.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)nfsm_subs.h 8.1 (Berkeley) 6/16/93
+ */
+
+/*
+ * These macros do strange and peculiar things to mbuf chains for
+ * the assistance of the nfs code. To attempt to use them for any
+ * other purpose will be dangerous. (they make weird assumptions)
+ */
+
+/*
+ * First define what the actual subs. return
+ */
+extern struct mbuf *nfsm_reqh();
+
+#define M_HASCL(m) ((m)->m_flags & M_EXT)
+#define NFSMINOFF(m) \
+ if (M_HASCL(m)) \
+ (m)->m_data = (m)->m_ext.ext_buf; \
+ else if ((m)->m_flags & M_PKTHDR) \
+ (m)->m_data = (m)->m_pktdat; \
+ else \
+ (m)->m_data = (m)->m_dat
+#define NFSMADV(m, s) (m)->m_data += (s)
+#define NFSMSIZ(m) ((M_HASCL(m))?MCLBYTES: \
+ (((m)->m_flags & M_PKTHDR)?MHLEN:MLEN))
+
+/*
+ * Now for the macros that do the simple stuff and call the functions
+ * for the hard stuff.
+ * These macros use several vars. declared in nfsm_reqhead and these
+ * vars. must not be used elsewhere unless you are careful not to corrupt
+ * them. The vars. starting with pN and tN (N=1,2,3,..) are temporaries
+ * that may be used so long as the value is not expected to retained
+ * after a macro.
+ * I know, this is kind of dorkey, but it makes the actual op functions
+ * fairly clean and deals with the mess caused by the xdr discriminating
+ * unions.
+ */
+
+#define nfsm_build(a,c,s) \
+ { if ((s) > M_TRAILINGSPACE(mb)) { \
+ MGET(mb2, M_WAIT, MT_DATA); \
+ if ((s) > MLEN) \
+ panic("build > MLEN"); \
+ mb->m_next = mb2; \
+ mb = mb2; \
+ mb->m_len = 0; \
+ bpos = mtod(mb, caddr_t); \
+ } \
+ (a) = (c)(bpos); \
+ mb->m_len += (s); \
+ bpos += (s); }
+
+#define nfsm_dissect(a,c,s) \
+ { t1 = mtod(md, caddr_t)+md->m_len-dpos; \
+ if (t1 >= (s)) { \
+ (a) = (c)(dpos); \
+ dpos += (s); \
+ } else if (error = nfsm_disct(&md, &dpos, (s), t1, &cp2)) { \
+ m_freem(mrep); \
+ goto nfsmout; \
+ } else { \
+ (a) = (c)cp2; \
+ } }
+
+#define nfsm_fhtom(v) \
+ nfsm_build(cp,caddr_t,NFSX_FH); \
+ bcopy((caddr_t)&(VTONFS(v)->n_fh), cp, NFSX_FH)
+
+#define nfsm_srvfhtom(f) \
+ nfsm_build(cp,caddr_t,NFSX_FH); \
+ bcopy((caddr_t)(f), cp, NFSX_FH)
+
+#define nfsm_mtofh(d,v) \
+ { struct nfsnode *np; nfsv2fh_t *fhp; \
+ nfsm_dissect(fhp,nfsv2fh_t *,NFSX_FH); \
+ if (error = nfs_nget((d)->v_mount, fhp, &np)) { \
+ m_freem(mrep); \
+ goto nfsmout; \
+ } \
+ (v) = NFSTOV(np); \
+ nfsm_loadattr(v, (struct vattr *)0); \
+ }
+
+#define nfsm_loadattr(v,a) \
+ { struct vnode *tvp = (v); \
+ if (error = nfs_loadattrcache(&tvp, &md, &dpos, (a))) { \
+ m_freem(mrep); \
+ goto nfsmout; \
+ } \
+ (v) = tvp; }
+
+#define nfsm_strsiz(s,m) \
+ { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \
+ if (((s) = fxdr_unsigned(long,*tl)) > (m)) { \
+ m_freem(mrep); \
+ error = EBADRPC; \
+ goto nfsmout; \
+ } }
+
+#define nfsm_srvstrsiz(s,m) \
+ { nfsm_dissect(tl,u_long *,NFSX_UNSIGNED); \
+ if (((s) = fxdr_unsigned(long,*tl)) > (m) || (s) <= 0) { \
+ error = EBADRPC; \
+ nfsm_reply(0); \
+ } }
+
+#define nfsm_mtouio(p,s) \
+ if ((s) > 0 && \
+ (error = nfsm_mbuftouio(&md,(p),(s),&dpos))) { \
+ m_freem(mrep); \
+ goto nfsmout; \
+ }
+
+#define nfsm_uiotom(p,s) \
+ if (error = nfsm_uiotombuf((p),&mb,(s),&bpos)) { \
+ m_freem(mreq); \
+ goto nfsmout; \
+ }
+
+#define nfsm_reqhead(v,a,s) \
+ mb = mreq = nfsm_reqh((v),(a),(s),&bpos)
+
+#define nfsm_reqdone m_freem(mrep); \
+ nfsmout:
+
+#define nfsm_rndup(a) (((a)+3)&(~0x3))
+
+#define nfsm_request(v, t, p, c) \
+ if (error = nfs_request((v), mreq, (t), (p), \
+ (c), &mrep, &md, &dpos)) \
+ goto nfsmout
+
+#define nfsm_strtom(a,s,m) \
+ if ((s) > (m)) { \
+ m_freem(mreq); \
+ error = ENAMETOOLONG; \
+ goto nfsmout; \
+ } \
+ t2 = nfsm_rndup(s)+NFSX_UNSIGNED; \
+ if (t2 <= M_TRAILINGSPACE(mb)) { \
+ nfsm_build(tl,u_long *,t2); \
+ *tl++ = txdr_unsigned(s); \
+ *(tl+((t2>>2)-2)) = 0; \
+ bcopy((caddr_t)(a), (caddr_t)tl, (s)); \
+ } else if (error = nfsm_strtmbuf(&mb, &bpos, (a), (s))) { \
+ m_freem(mreq); \
+ goto nfsmout; \
+ }
+
+#define nfsm_srvdone \
+ nfsmout: \
+ return(error)
+
+#define nfsm_reply(s) \
+ { \
+ nfsd->nd_repstat = error; \
+ if (error) \
+ (void) nfs_rephead(0, nfsd, error, cache, &frev, \
+ mrq, &mb, &bpos); \
+ else \
+ (void) nfs_rephead((s), nfsd, error, cache, &frev, \
+ mrq, &mb, &bpos); \
+ m_freem(mrep); \
+ mreq = *mrq; \
+ if (error) \
+ return(0); \
+ }
+
+#define nfsm_adv(s) \
+ t1 = mtod(md, caddr_t)+md->m_len-dpos; \
+ if (t1 >= (s)) { \
+ dpos += (s); \
+ } else if (error = nfs_adv(&md, &dpos, (s), t1)) { \
+ m_freem(mrep); \
+ goto nfsmout; \
+ }
+
+#define nfsm_srvmtofh(f) \
+ nfsm_dissect(tl, u_long *, NFSX_FH); \
+ bcopy((caddr_t)tl, (caddr_t)f, NFSX_FH)
+
+#define nfsm_clget \
+ if (bp >= be) { \
+ if (mp == mb) \
+ mp->m_len += bp-bpos; \
+ MGET(mp, M_WAIT, MT_DATA); \
+ MCLGET(mp, M_WAIT); \
+ mp->m_len = NFSMSIZ(mp); \
+ mp2->m_next = mp; \
+ mp2 = mp; \
+ bp = mtod(mp, caddr_t); \
+ be = bp+mp->m_len; \
+ } \
+ tl = (u_long *)bp
+
+#define nfsm_srvfillattr \
+ fp->fa_type = vtonfs_type(vap->va_type); \
+ fp->fa_mode = vtonfs_mode(vap->va_type, vap->va_mode); \
+ fp->fa_nlink = txdr_unsigned(vap->va_nlink); \
+ fp->fa_uid = txdr_unsigned(vap->va_uid); \
+ fp->fa_gid = txdr_unsigned(vap->va_gid); \
+ if (nfsd->nd_nqlflag == NQL_NOVAL) { \
+ fp->fa_nfsblocksize = txdr_unsigned(vap->va_blocksize); \
+ if (vap->va_type == VFIFO) \
+ fp->fa_nfsrdev = 0xffffffff; \
+ else \
+ fp->fa_nfsrdev = txdr_unsigned(vap->va_rdev); \
+ fp->fa_nfsfsid = txdr_unsigned(vap->va_fsid); \
+ fp->fa_nfsfileid = txdr_unsigned(vap->va_fileid); \
+ fp->fa_nfssize = txdr_unsigned(vap->va_size); \
+ fp->fa_nfsblocks = txdr_unsigned(vap->va_bytes / NFS_FABLKSIZE); \
+ txdr_nfstime(&vap->va_atime, &fp->fa_nfsatime); \
+ txdr_nfstime(&vap->va_mtime, &fp->fa_nfsmtime); \
+ fp->fa_nfsctime.nfs_sec = txdr_unsigned(vap->va_ctime.ts_sec); \
+ fp->fa_nfsctime.nfs_usec = txdr_unsigned(vap->va_gen); \
+ } else { \
+ fp->fa_nqblocksize = txdr_unsigned(vap->va_blocksize); \
+ if (vap->va_type == VFIFO) \
+ fp->fa_nqrdev = 0xffffffff; \
+ else \
+ fp->fa_nqrdev = txdr_unsigned(vap->va_rdev); \
+ fp->fa_nqfsid = txdr_unsigned(vap->va_fsid); \
+ fp->fa_nqfileid = txdr_unsigned(vap->va_fileid); \
+ txdr_hyper(&vap->va_size, &fp->fa_nqsize); \
+ txdr_hyper(&vap->va_bytes, &fp->fa_nqbytes); \
+ txdr_nqtime(&vap->va_atime, &fp->fa_nqatime); \
+ txdr_nqtime(&vap->va_mtime, &fp->fa_nqmtime); \
+ txdr_nqtime(&vap->va_ctime, &fp->fa_nqctime); \
+ fp->fa_nqflags = txdr_unsigned(vap->va_flags); \
+ fp->fa_nqgen = txdr_unsigned(vap->va_gen); \
+ txdr_hyper(&vap->va_filerev, &fp->fa_nqfilerev); \
+ }
+
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