BSD 4.4 Lite Kernel Sources

1 files changed, 269 insertions, 0 deletions

diff --git a/sys/nfs/nfs_common.h b/sys/nfs/nfs_common.h
new file mode 100644
index 0000000..879db36
--- /dev/null
+++ b/sys/nfs/nfs_common.h
@@ -0,0 +1,269 @@
+/*
+ * 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); \
+	}
+